From 0793998de885cef77e9eeb455351ad5c2e4112e6 Mon Sep 17 00:00:00 2001 From: Larvan2 <78135608+Larvan2@users.noreply.github.com> Date: Fri, 16 Aug 2024 14:15:36 +0800 Subject: [PATCH] chore: drop support of eBPF --- Makefile | 4 - component/ebpf/bpf/bpf_endian.h | 99 - component/ebpf/bpf/bpf_helper_defs.h | 4139 ----------------- component/ebpf/bpf/bpf_helpers.h | 262 -- component/ebpf/bpf/redir.c | 342 -- component/ebpf/bpf/tc.c | 103 - component/ebpf/byteorder/byteorder.go | 13 - .../ebpf/byteorder/byteorder_bigendian.go | 12 - .../ebpf/byteorder/byteorder_littleendian.go | 15 - component/ebpf/ebpf.go | 33 - component/ebpf/ebpf_linux.go | 137 - component/ebpf/ebpf_others.go | 21 - component/ebpf/redir/auto_redirect.go | 216 - component/ebpf/redir/bpf_bpfeb.go | 139 - component/ebpf/redir/bpf_bpfeb.o | Bin 15608 -> 0 bytes component/ebpf/redir/bpf_bpfel.go | 139 - component/ebpf/redir/bpf_bpfel.o | Bin 15624 -> 0 bytes component/ebpf/tc/bpf_bpfeb.go | 120 - component/ebpf/tc/bpf_bpfeb.o | Bin 5168 -> 0 bytes component/ebpf/tc/bpf_bpfel.go | 120 - component/ebpf/tc/bpf_bpfel.o | Bin 5168 -> 0 bytes component/ebpf/tc/redirect_to_tun.go | 147 - config/config.go | 13 - constant/ebpf.go | 20 - docs/config.yaml | 7 - go.mod | 2 +- go.sum | 8 +- hub/executor/executor.go | 5 - listener/autoredir/tcp.go | 95 - listener/listener.go | 94 - test/go.mod | 1 - test/go.sum | 2 - 32 files changed, 4 insertions(+), 6304 deletions(-) delete mode 100644 component/ebpf/bpf/bpf_endian.h delete mode 100644 component/ebpf/bpf/bpf_helper_defs.h delete mode 100644 component/ebpf/bpf/bpf_helpers.h delete mode 100644 component/ebpf/bpf/redir.c delete mode 100644 component/ebpf/bpf/tc.c delete mode 100644 component/ebpf/byteorder/byteorder.go delete mode 100644 component/ebpf/byteorder/byteorder_bigendian.go delete mode 100644 component/ebpf/byteorder/byteorder_littleendian.go delete mode 100644 component/ebpf/ebpf.go delete mode 100644 component/ebpf/ebpf_linux.go delete mode 100644 component/ebpf/ebpf_others.go delete mode 100644 component/ebpf/redir/auto_redirect.go delete mode 100644 component/ebpf/redir/bpf_bpfeb.go delete mode 100644 component/ebpf/redir/bpf_bpfeb.o delete mode 100644 component/ebpf/redir/bpf_bpfel.go delete mode 100644 component/ebpf/redir/bpf_bpfel.o delete mode 100644 component/ebpf/tc/bpf_bpfeb.go delete mode 100644 component/ebpf/tc/bpf_bpfeb.o delete mode 100644 component/ebpf/tc/bpf_bpfel.go delete mode 100644 component/ebpf/tc/bpf_bpfel.o delete mode 100644 component/ebpf/tc/redirect_to_tun.go delete mode 100644 constant/ebpf.go delete mode 100644 listener/autoredir/tcp.go diff --git a/Makefile b/Makefile index 59bec41e..36c640d5 100644 --- a/Makefile +++ b/Makefile @@ -163,7 +163,3 @@ clean: CLANG ?= clang-14 CFLAGS := -O2 -g -Wall -Werror $(CFLAGS) -ebpf: export BPF_CLANG := $(CLANG) -ebpf: export BPF_CFLAGS := $(CFLAGS) -ebpf: - cd component/ebpf/ && go generate ./... diff --git a/component/ebpf/bpf/bpf_endian.h b/component/ebpf/bpf/bpf_endian.h deleted file mode 100644 index ec9db4fe..00000000 --- a/component/ebpf/bpf/bpf_endian.h +++ /dev/null @@ -1,99 +0,0 @@ -/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */ -#ifndef __BPF_ENDIAN__ -#define __BPF_ENDIAN__ - -/* - * Isolate byte #n and put it into byte #m, for __u##b type. - * E.g., moving byte #6 (nnnnnnnn) into byte #1 (mmmmmmmm) for __u64: - * 1) xxxxxxxx nnnnnnnn xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx mmmmmmmm xxxxxxxx - * 2) nnnnnnnn xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx mmmmmmmm xxxxxxxx 00000000 - * 3) 00000000 00000000 00000000 00000000 00000000 00000000 00000000 nnnnnnnn - * 4) 00000000 00000000 00000000 00000000 00000000 00000000 nnnnnnnn 00000000 - */ -#define ___bpf_mvb(x, b, n, m) ((__u##b)(x) << (b-(n+1)*8) >> (b-8) << (m*8)) - -#define ___bpf_swab16(x) ((__u16)( \ - ___bpf_mvb(x, 16, 0, 1) | \ - ___bpf_mvb(x, 16, 1, 0))) - -#define ___bpf_swab32(x) ((__u32)( \ - ___bpf_mvb(x, 32, 0, 3) | \ - ___bpf_mvb(x, 32, 1, 2) | \ - ___bpf_mvb(x, 32, 2, 1) | \ - ___bpf_mvb(x, 32, 3, 0))) - -#define ___bpf_swab64(x) ((__u64)( \ - ___bpf_mvb(x, 64, 0, 7) | \ - ___bpf_mvb(x, 64, 1, 6) | \ - ___bpf_mvb(x, 64, 2, 5) | \ - ___bpf_mvb(x, 64, 3, 4) | \ - ___bpf_mvb(x, 64, 4, 3) | \ - ___bpf_mvb(x, 64, 5, 2) | \ - ___bpf_mvb(x, 64, 6, 1) | \ - ___bpf_mvb(x, 64, 7, 0))) - -/* LLVM's BPF target selects the endianness of the CPU - * it compiles on, or the user specifies (bpfel/bpfeb), - * respectively. The used __BYTE_ORDER__ is defined by - * the compiler, we cannot rely on __BYTE_ORDER from - * libc headers, since it doesn't reflect the actual - * requested byte order. - * - * Note, LLVM's BPF target has different __builtin_bswapX() - * semantics. It does map to BPF_ALU | BPF_END | BPF_TO_BE - * in bpfel and bpfeb case, which means below, that we map - * to cpu_to_be16(). We could use it unconditionally in BPF - * case, but better not rely on it, so that this header here - * can be used from application and BPF program side, which - * use different targets. - */ -#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ -# define __bpf_ntohs(x) __builtin_bswap16(x) -# define __bpf_htons(x) __builtin_bswap16(x) -# define __bpf_constant_ntohs(x) ___bpf_swab16(x) -# define __bpf_constant_htons(x) ___bpf_swab16(x) -# define __bpf_ntohl(x) __builtin_bswap32(x) -# define __bpf_htonl(x) __builtin_bswap32(x) -# define __bpf_constant_ntohl(x) ___bpf_swab32(x) -# define __bpf_constant_htonl(x) ___bpf_swab32(x) -# define __bpf_be64_to_cpu(x) __builtin_bswap64(x) -# define __bpf_cpu_to_be64(x) __builtin_bswap64(x) -# define __bpf_constant_be64_to_cpu(x) ___bpf_swab64(x) -# define __bpf_constant_cpu_to_be64(x) ___bpf_swab64(x) -#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ -# define __bpf_ntohs(x) (x) -# define __bpf_htons(x) (x) -# define __bpf_constant_ntohs(x) (x) -# define __bpf_constant_htons(x) (x) -# define __bpf_ntohl(x) (x) -# define __bpf_htonl(x) (x) -# define __bpf_constant_ntohl(x) (x) -# define __bpf_constant_htonl(x) (x) -# define __bpf_be64_to_cpu(x) (x) -# define __bpf_cpu_to_be64(x) (x) -# define __bpf_constant_be64_to_cpu(x) (x) -# define __bpf_constant_cpu_to_be64(x) (x) -#else -# error "Fix your compiler's __BYTE_ORDER__?!" -#endif - -#define bpf_htons(x) \ - (__builtin_constant_p(x) ? \ - __bpf_constant_htons(x) : __bpf_htons(x)) -#define bpf_ntohs(x) \ - (__builtin_constant_p(x) ? \ - __bpf_constant_ntohs(x) : __bpf_ntohs(x)) -#define bpf_htonl(x) \ - (__builtin_constant_p(x) ? \ - __bpf_constant_htonl(x) : __bpf_htonl(x)) -#define bpf_ntohl(x) \ - (__builtin_constant_p(x) ? \ - __bpf_constant_ntohl(x) : __bpf_ntohl(x)) -#define bpf_cpu_to_be64(x) \ - (__builtin_constant_p(x) ? \ - __bpf_constant_cpu_to_be64(x) : __bpf_cpu_to_be64(x)) -#define bpf_be64_to_cpu(x) \ - (__builtin_constant_p(x) ? \ - __bpf_constant_be64_to_cpu(x) : __bpf_be64_to_cpu(x)) - -#endif /* __BPF_ENDIAN__ */ diff --git a/component/ebpf/bpf/bpf_helper_defs.h b/component/ebpf/bpf/bpf_helper_defs.h deleted file mode 100644 index 8a4edf61..00000000 --- a/component/ebpf/bpf/bpf_helper_defs.h +++ /dev/null @@ -1,4139 +0,0 @@ -/* This is auto-generated file. See bpf_doc.py for details. */ - -/* Forward declarations of BPF structs */ -struct bpf_fib_lookup; -struct bpf_sk_lookup; -struct bpf_perf_event_data; -struct bpf_perf_event_value; -struct bpf_pidns_info; -struct bpf_redir_neigh; -struct bpf_sock; -struct bpf_sock_addr; -struct bpf_sock_ops; -struct bpf_sock_tuple; -struct bpf_spin_lock; -struct bpf_sysctl; -struct bpf_tcp_sock; -struct bpf_tunnel_key; -struct bpf_xfrm_state; -struct linux_binprm; -struct pt_regs; -struct sk_reuseport_md; -struct sockaddr; -struct tcphdr; -struct seq_file; -struct tcp6_sock; -struct tcp_sock; -struct tcp_timewait_sock; -struct tcp_request_sock; -struct udp6_sock; -struct unix_sock; -struct task_struct; -struct __sk_buff; -struct sk_msg_md; -struct xdp_md; -struct path; -struct btf_ptr; -struct inode; -struct socket; -struct file; -struct bpf_timer; - -/* - * bpf_map_lookup_elem - * - * Perform a lookup in *map* for an entry associated to *key*. - * - * Returns - * Map value associated to *key*, or **NULL** if no entry was - * found. - */ -static void *(*bpf_map_lookup_elem)(void *map, const void *key) = (void *) 1; - -/* - * bpf_map_update_elem - * - * Add or update the value of the entry associated to *key* in - * *map* with *value*. *flags* is one of: - * - * **BPF_NOEXIST** - * The entry for *key* must not exist in the map. - * **BPF_EXIST** - * The entry for *key* must already exist in the map. - * **BPF_ANY** - * No condition on the existence of the entry for *key*. - * - * Flag value **BPF_NOEXIST** cannot be used for maps of types - * **BPF_MAP_TYPE_ARRAY** or **BPF_MAP_TYPE_PERCPU_ARRAY** (all - * elements always exist), the helper would return an error. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_map_update_elem)(void *map, const void *key, const void *value, __u64 flags) = (void *) 2; - -/* - * bpf_map_delete_elem - * - * Delete entry with *key* from *map*. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_map_delete_elem)(void *map, const void *key) = (void *) 3; - -/* - * bpf_probe_read - * - * For tracing programs, safely attempt to read *size* bytes from - * kernel space address *unsafe_ptr* and store the data in *dst*. - * - * Generally, use **bpf_probe_read_user**\ () or - * **bpf_probe_read_kernel**\ () instead. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_probe_read)(void *dst, __u32 size, const void *unsafe_ptr) = (void *) 4; - -/* - * bpf_ktime_get_ns - * - * Return the time elapsed since system boot, in nanoseconds. - * Does not include time the system was suspended. - * See: **clock_gettime**\ (**CLOCK_MONOTONIC**) - * - * Returns - * Current *ktime*. - */ -static __u64 (*bpf_ktime_get_ns)(void) = (void *) 5; - -/* - * bpf_trace_printk - * - * This helper is a "printk()-like" facility for debugging. It - * prints a message defined by format *fmt* (of size *fmt_size*) - * to file *\/sys/kernel/debug/tracing/trace* from DebugFS, if - * available. It can take up to three additional **u64** - * arguments (as an eBPF helpers, the total number of arguments is - * limited to five). - * - * Each time the helper is called, it appends a line to the trace. - * Lines are discarded while *\/sys/kernel/debug/tracing/trace* is - * open, use *\/sys/kernel/debug/tracing/trace_pipe* to avoid this. - * The format of the trace is customizable, and the exact output - * one will get depends on the options set in - * *\/sys/kernel/debug/tracing/trace_options* (see also the - * *README* file under the same directory). However, it usually - * defaults to something like: - * - * :: - * - * telnet-470 [001] .N.. 419421.045894: 0x00000001: - * - * In the above: - * - * * ``telnet`` is the name of the current task. - * * ``470`` is the PID of the current task. - * * ``001`` is the CPU number on which the task is - * running. - * * In ``.N..``, each character refers to a set of - * options (whether irqs are enabled, scheduling - * options, whether hard/softirqs are running, level of - * preempt_disabled respectively). **N** means that - * **TIF_NEED_RESCHED** and **PREEMPT_NEED_RESCHED** - * are set. - * * ``419421.045894`` is a timestamp. - * * ``0x00000001`` is a fake value used by BPF for the - * instruction pointer register. - * * ```` is the message formatted with - * *fmt*. - * - * The conversion specifiers supported by *fmt* are similar, but - * more limited than for printk(). They are **%d**, **%i**, - * **%u**, **%x**, **%ld**, **%li**, **%lu**, **%lx**, **%lld**, - * **%lli**, **%llu**, **%llx**, **%p**, **%s**. No modifier (size - * of field, padding with zeroes, etc.) is available, and the - * helper will return **-EINVAL** (but print nothing) if it - * encounters an unknown specifier. - * - * Also, note that **bpf_trace_printk**\ () is slow, and should - * only be used for debugging purposes. For this reason, a notice - * block (spanning several lines) is printed to kernel logs and - * states that the helper should not be used "for production use" - * the first time this helper is used (or more precisely, when - * **trace_printk**\ () buffers are allocated). For passing values - * to user space, perf events should be preferred. - * - * Returns - * The number of bytes written to the buffer, or a negative error - * in case of failure. - */ -static long (*bpf_trace_printk)(const char *fmt, __u32 fmt_size, ...) = (void *) 6; - -/* - * bpf_get_prandom_u32 - * - * Get a pseudo-random number. - * - * From a security point of view, this helper uses its own - * pseudo-random internal state, and cannot be used to infer the - * seed of other random functions in the kernel. However, it is - * essential to note that the generator used by the helper is not - * cryptographically secure. - * - * Returns - * A random 32-bit unsigned value. - */ -static __u32 (*bpf_get_prandom_u32)(void) = (void *) 7; - -/* - * bpf_get_smp_processor_id - * - * Get the SMP (symmetric multiprocessing) processor id. Note that - * all programs run with migration disabled, which means that the - * SMP processor id is stable during all the execution of the - * program. - * - * Returns - * The SMP id of the processor running the program. - */ -static __u32 (*bpf_get_smp_processor_id)(void) = (void *) 8; - -/* - * bpf_skb_store_bytes - * - * Store *len* bytes from address *from* into the packet - * associated to *skb*, at *offset*. *flags* are a combination of - * **BPF_F_RECOMPUTE_CSUM** (automatically recompute the - * checksum for the packet after storing the bytes) and - * **BPF_F_INVALIDATE_HASH** (set *skb*\ **->hash**, *skb*\ - * **->swhash** and *skb*\ **->l4hash** to 0). - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_skb_store_bytes)(struct __sk_buff *skb, __u32 offset, const void *from, __u32 len, __u64 flags) = (void *) 9; - -/* - * bpf_l3_csum_replace - * - * Recompute the layer 3 (e.g. IP) checksum for the packet - * associated to *skb*. Computation is incremental, so the helper - * must know the former value of the header field that was - * modified (*from*), the new value of this field (*to*), and the - * number of bytes (2 or 4) for this field, stored in *size*. - * Alternatively, it is possible to store the difference between - * the previous and the new values of the header field in *to*, by - * setting *from* and *size* to 0. For both methods, *offset* - * indicates the location of the IP checksum within the packet. - * - * This helper works in combination with **bpf_csum_diff**\ (), - * which does not update the checksum in-place, but offers more - * flexibility and can handle sizes larger than 2 or 4 for the - * checksum to update. - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_l3_csum_replace)(struct __sk_buff *skb, __u32 offset, __u64 from, __u64 to, __u64 size) = (void *) 10; - -/* - * bpf_l4_csum_replace - * - * Recompute the layer 4 (e.g. TCP, UDP or ICMP) checksum for the - * packet associated to *skb*. Computation is incremental, so the - * helper must know the former value of the header field that was - * modified (*from*), the new value of this field (*to*), and the - * number of bytes (2 or 4) for this field, stored on the lowest - * four bits of *flags*. Alternatively, it is possible to store - * the difference between the previous and the new values of the - * header field in *to*, by setting *from* and the four lowest - * bits of *flags* to 0. For both methods, *offset* indicates the - * location of the IP checksum within the packet. In addition to - * the size of the field, *flags* can be added (bitwise OR) actual - * flags. With **BPF_F_MARK_MANGLED_0**, a null checksum is left - * untouched (unless **BPF_F_MARK_ENFORCE** is added as well), and - * for updates resulting in a null checksum the value is set to - * **CSUM_MANGLED_0** instead. Flag **BPF_F_PSEUDO_HDR** indicates - * the checksum is to be computed against a pseudo-header. - * - * This helper works in combination with **bpf_csum_diff**\ (), - * which does not update the checksum in-place, but offers more - * flexibility and can handle sizes larger than 2 or 4 for the - * checksum to update. - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_l4_csum_replace)(struct __sk_buff *skb, __u32 offset, __u64 from, __u64 to, __u64 flags) = (void *) 11; - -/* - * bpf_tail_call - * - * This special helper is used to trigger a "tail call", or in - * other words, to jump into another eBPF program. The same stack - * frame is used (but values on stack and in registers for the - * caller are not accessible to the callee). This mechanism allows - * for program chaining, either for raising the maximum number of - * available eBPF instructions, or to execute given programs in - * conditional blocks. For security reasons, there is an upper - * limit to the number of successive tail calls that can be - * performed. - * - * Upon call of this helper, the program attempts to jump into a - * program referenced at index *index* in *prog_array_map*, a - * special map of type **BPF_MAP_TYPE_PROG_ARRAY**, and passes - * *ctx*, a pointer to the context. - * - * If the call succeeds, the kernel immediately runs the first - * instruction of the new program. This is not a function call, - * and it never returns to the previous program. If the call - * fails, then the helper has no effect, and the caller continues - * to run its subsequent instructions. A call can fail if the - * destination program for the jump does not exist (i.e. *index* - * is superior to the number of entries in *prog_array_map*), or - * if the maximum number of tail calls has been reached for this - * chain of programs. This limit is defined in the kernel by the - * macro **MAX_TAIL_CALL_CNT** (not accessible to user space), - * which is currently set to 33. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_tail_call)(void *ctx, void *prog_array_map, __u32 index) = (void *) 12; - -/* - * bpf_clone_redirect - * - * Clone and redirect the packet associated to *skb* to another - * net device of index *ifindex*. Both ingress and egress - * interfaces can be used for redirection. The **BPF_F_INGRESS** - * value in *flags* is used to make the distinction (ingress path - * is selected if the flag is present, egress path otherwise). - * This is the only flag supported for now. - * - * In comparison with **bpf_redirect**\ () helper, - * **bpf_clone_redirect**\ () has the associated cost of - * duplicating the packet buffer, but this can be executed out of - * the eBPF program. Conversely, **bpf_redirect**\ () is more - * efficient, but it is handled through an action code where the - * redirection happens only after the eBPF program has returned. - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_clone_redirect)(struct __sk_buff *skb, __u32 ifindex, __u64 flags) = (void *) 13; - -/* - * bpf_get_current_pid_tgid - * - * - * Returns - * A 64-bit integer containing the current tgid and pid, and - * created as such: - * *current_task*\ **->tgid << 32 \|** - * *current_task*\ **->pid**. - */ -static __u64 (*bpf_get_current_pid_tgid)(void) = (void *) 14; - -/* - * bpf_get_current_uid_gid - * - * - * Returns - * A 64-bit integer containing the current GID and UID, and - * created as such: *current_gid* **<< 32 \|** *current_uid*. - */ -static __u64 (*bpf_get_current_uid_gid)(void) = (void *) 15; - -/* - * bpf_get_current_comm - * - * Copy the **comm** attribute of the current task into *buf* of - * *size_of_buf*. The **comm** attribute contains the name of - * the executable (excluding the path) for the current task. The - * *size_of_buf* must be strictly positive. On success, the - * helper makes sure that the *buf* is NUL-terminated. On failure, - * it is filled with zeroes. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_get_current_comm)(void *buf, __u32 size_of_buf) = (void *) 16; - -/* - * bpf_get_cgroup_classid - * - * Retrieve the classid for the current task, i.e. for the net_cls - * cgroup to which *skb* belongs. - * - * This helper can be used on TC egress path, but not on ingress. - * - * The net_cls cgroup provides an interface to tag network packets - * based on a user-provided identifier for all traffic coming from - * the tasks belonging to the related cgroup. See also the related - * kernel documentation, available from the Linux sources in file - * *Documentation/admin-guide/cgroup-v1/net_cls.rst*. - * - * The Linux kernel has two versions for cgroups: there are - * cgroups v1 and cgroups v2. Both are available to users, who can - * use a mixture of them, but note that the net_cls cgroup is for - * cgroup v1 only. This makes it incompatible with BPF programs - * run on cgroups, which is a cgroup-v2-only feature (a socket can - * only hold data for one version of cgroups at a time). - * - * This helper is only available is the kernel was compiled with - * the **CONFIG_CGROUP_NET_CLASSID** configuration option set to - * "**y**" or to "**m**". - * - * Returns - * The classid, or 0 for the default unconfigured classid. - */ -static __u32 (*bpf_get_cgroup_classid)(struct __sk_buff *skb) = (void *) 17; - -/* - * bpf_skb_vlan_push - * - * Push a *vlan_tci* (VLAN tag control information) of protocol - * *vlan_proto* to the packet associated to *skb*, then update - * the checksum. Note that if *vlan_proto* is different from - * **ETH_P_8021Q** and **ETH_P_8021AD**, it is considered to - * be **ETH_P_8021Q**. - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_skb_vlan_push)(struct __sk_buff *skb, __be16 vlan_proto, __u16 vlan_tci) = (void *) 18; - -/* - * bpf_skb_vlan_pop - * - * Pop a VLAN header from the packet associated to *skb*. - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_skb_vlan_pop)(struct __sk_buff *skb) = (void *) 19; - -/* - * bpf_skb_get_tunnel_key - * - * Get tunnel metadata. This helper takes a pointer *key* to an - * empty **struct bpf_tunnel_key** of **size**, that will be - * filled with tunnel metadata for the packet associated to *skb*. - * The *flags* can be set to **BPF_F_TUNINFO_IPV6**, which - * indicates that the tunnel is based on IPv6 protocol instead of - * IPv4. - * - * The **struct bpf_tunnel_key** is an object that generalizes the - * principal parameters used by various tunneling protocols into a - * single struct. This way, it can be used to easily make a - * decision based on the contents of the encapsulation header, - * "summarized" in this struct. In particular, it holds the IP - * address of the remote end (IPv4 or IPv6, depending on the case) - * in *key*\ **->remote_ipv4** or *key*\ **->remote_ipv6**. Also, - * this struct exposes the *key*\ **->tunnel_id**, which is - * generally mapped to a VNI (Virtual Network Identifier), making - * it programmable together with the **bpf_skb_set_tunnel_key**\ - * () helper. - * - * Let's imagine that the following code is part of a program - * attached to the TC ingress interface, on one end of a GRE - * tunnel, and is supposed to filter out all messages coming from - * remote ends with IPv4 address other than 10.0.0.1: - * - * :: - * - * int ret; - * struct bpf_tunnel_key key = {}; - * - * ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key), 0); - * if (ret < 0) - * return TC_ACT_SHOT; // drop packet - * - * if (key.remote_ipv4 != 0x0a000001) - * return TC_ACT_SHOT; // drop packet - * - * return TC_ACT_OK; // accept packet - * - * This interface can also be used with all encapsulation devices - * that can operate in "collect metadata" mode: instead of having - * one network device per specific configuration, the "collect - * metadata" mode only requires a single device where the - * configuration can be extracted from this helper. - * - * This can be used together with various tunnels such as VXLan, - * Geneve, GRE or IP in IP (IPIP). - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_skb_get_tunnel_key)(struct __sk_buff *skb, struct bpf_tunnel_key *key, __u32 size, __u64 flags) = (void *) 20; - -/* - * bpf_skb_set_tunnel_key - * - * Populate tunnel metadata for packet associated to *skb.* The - * tunnel metadata is set to the contents of *key*, of *size*. The - * *flags* can be set to a combination of the following values: - * - * **BPF_F_TUNINFO_IPV6** - * Indicate that the tunnel is based on IPv6 protocol - * instead of IPv4. - * **BPF_F_ZERO_CSUM_TX** - * For IPv4 packets, add a flag to tunnel metadata - * indicating that checksum computation should be skipped - * and checksum set to zeroes. - * **BPF_F_DONT_FRAGMENT** - * Add a flag to tunnel metadata indicating that the - * packet should not be fragmented. - * **BPF_F_SEQ_NUMBER** - * Add a flag to tunnel metadata indicating that a - * sequence number should be added to tunnel header before - * sending the packet. This flag was added for GRE - * encapsulation, but might be used with other protocols - * as well in the future. - * - * Here is a typical usage on the transmit path: - * - * :: - * - * struct bpf_tunnel_key key; - * populate key ... - * bpf_skb_set_tunnel_key(skb, &key, sizeof(key), 0); - * bpf_clone_redirect(skb, vxlan_dev_ifindex, 0); - * - * See also the description of the **bpf_skb_get_tunnel_key**\ () - * helper for additional information. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_skb_set_tunnel_key)(struct __sk_buff *skb, struct bpf_tunnel_key *key, __u32 size, __u64 flags) = (void *) 21; - -/* - * bpf_perf_event_read - * - * Read the value of a perf event counter. This helper relies on a - * *map* of type **BPF_MAP_TYPE_PERF_EVENT_ARRAY**. The nature of - * the perf event counter is selected when *map* is updated with - * perf event file descriptors. The *map* is an array whose size - * is the number of available CPUs, and each cell contains a value - * relative to one CPU. The value to retrieve is indicated by - * *flags*, that contains the index of the CPU to look up, masked - * with **BPF_F_INDEX_MASK**. Alternatively, *flags* can be set to - * **BPF_F_CURRENT_CPU** to indicate that the value for the - * current CPU should be retrieved. - * - * Note that before Linux 4.13, only hardware perf event can be - * retrieved. - * - * Also, be aware that the newer helper - * **bpf_perf_event_read_value**\ () is recommended over - * **bpf_perf_event_read**\ () in general. The latter has some ABI - * quirks where error and counter value are used as a return code - * (which is wrong to do since ranges may overlap). This issue is - * fixed with **bpf_perf_event_read_value**\ (), which at the same - * time provides more features over the **bpf_perf_event_read**\ - * () interface. Please refer to the description of - * **bpf_perf_event_read_value**\ () for details. - * - * Returns - * The value of the perf event counter read from the map, or a - * negative error code in case of failure. - */ -static __u64 (*bpf_perf_event_read)(void *map, __u64 flags) = (void *) 22; - -/* - * bpf_redirect - * - * Redirect the packet to another net device of index *ifindex*. - * This helper is somewhat similar to **bpf_clone_redirect**\ - * (), except that the packet is not cloned, which provides - * increased performance. - * - * Except for XDP, both ingress and egress interfaces can be used - * for redirection. The **BPF_F_INGRESS** value in *flags* is used - * to make the distinction (ingress path is selected if the flag - * is present, egress path otherwise). Currently, XDP only - * supports redirection to the egress interface, and accepts no - * flag at all. - * - * The same effect can also be attained with the more generic - * **bpf_redirect_map**\ (), which uses a BPF map to store the - * redirect target instead of providing it directly to the helper. - * - * Returns - * For XDP, the helper returns **XDP_REDIRECT** on success or - * **XDP_ABORTED** on error. For other program types, the values - * are **TC_ACT_REDIRECT** on success or **TC_ACT_SHOT** on - * error. - */ -static long (*bpf_redirect)(__u32 ifindex, __u64 flags) = (void *) 23; - -/* - * bpf_get_route_realm - * - * Retrieve the realm or the route, that is to say the - * **tclassid** field of the destination for the *skb*. The - * identifier retrieved is a user-provided tag, similar to the - * one used with the net_cls cgroup (see description for - * **bpf_get_cgroup_classid**\ () helper), but here this tag is - * held by a route (a destination entry), not by a task. - * - * Retrieving this identifier works with the clsact TC egress hook - * (see also **tc-bpf(8)**), or alternatively on conventional - * classful egress qdiscs, but not on TC ingress path. In case of - * clsact TC egress hook, this has the advantage that, internally, - * the destination entry has not been dropped yet in the transmit - * path. Therefore, the destination entry does not need to be - * artificially held via **netif_keep_dst**\ () for a classful - * qdisc until the *skb* is freed. - * - * This helper is available only if the kernel was compiled with - * **CONFIG_IP_ROUTE_CLASSID** configuration option. - * - * Returns - * The realm of the route for the packet associated to *skb*, or 0 - * if none was found. - */ -static __u32 (*bpf_get_route_realm)(struct __sk_buff *skb) = (void *) 24; - -/* - * bpf_perf_event_output - * - * Write raw *data* blob into a special BPF perf event held by - * *map* of type **BPF_MAP_TYPE_PERF_EVENT_ARRAY**. This perf - * event must have the following attributes: **PERF_SAMPLE_RAW** - * as **sample_type**, **PERF_TYPE_SOFTWARE** as **type**, and - * **PERF_COUNT_SW_BPF_OUTPUT** as **config**. - * - * The *flags* are used to indicate the index in *map* for which - * the value must be put, masked with **BPF_F_INDEX_MASK**. - * Alternatively, *flags* can be set to **BPF_F_CURRENT_CPU** - * to indicate that the index of the current CPU core should be - * used. - * - * The value to write, of *size*, is passed through eBPF stack and - * pointed by *data*. - * - * The context of the program *ctx* needs also be passed to the - * helper. - * - * On user space, a program willing to read the values needs to - * call **perf_event_open**\ () on the perf event (either for - * one or for all CPUs) and to store the file descriptor into the - * *map*. This must be done before the eBPF program can send data - * into it. An example is available in file - * *samples/bpf/trace_output_user.c* in the Linux kernel source - * tree (the eBPF program counterpart is in - * *samples/bpf/trace_output_kern.c*). - * - * **bpf_perf_event_output**\ () achieves better performance - * than **bpf_trace_printk**\ () for sharing data with user - * space, and is much better suitable for streaming data from eBPF - * programs. - * - * Note that this helper is not restricted to tracing use cases - * and can be used with programs attached to TC or XDP as well, - * where it allows for passing data to user space listeners. Data - * can be: - * - * * Only custom structs, - * * Only the packet payload, or - * * A combination of both. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_perf_event_output)(void *ctx, void *map, __u64 flags, void *data, __u64 size) = (void *) 25; - -/* - * bpf_skb_load_bytes - * - * This helper was provided as an easy way to load data from a - * packet. It can be used to load *len* bytes from *offset* from - * the packet associated to *skb*, into the buffer pointed by - * *to*. - * - * Since Linux 4.7, usage of this helper has mostly been replaced - * by "direct packet access", enabling packet data to be - * manipulated with *skb*\ **->data** and *skb*\ **->data_end** - * pointing respectively to the first byte of packet data and to - * the byte after the last byte of packet data. However, it - * remains useful if one wishes to read large quantities of data - * at once from a packet into the eBPF stack. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_skb_load_bytes)(const void *skb, __u32 offset, void *to, __u32 len) = (void *) 26; - -/* - * bpf_get_stackid - * - * Walk a user or a kernel stack and return its id. To achieve - * this, the helper needs *ctx*, which is a pointer to the context - * on which the tracing program is executed, and a pointer to a - * *map* of type **BPF_MAP_TYPE_STACK_TRACE**. - * - * The last argument, *flags*, holds the number of stack frames to - * skip (from 0 to 255), masked with - * **BPF_F_SKIP_FIELD_MASK**. The next bits can be used to set - * a combination of the following flags: - * - * **BPF_F_USER_STACK** - * Collect a user space stack instead of a kernel stack. - * **BPF_F_FAST_STACK_CMP** - * Compare stacks by hash only. - * **BPF_F_REUSE_STACKID** - * If two different stacks hash into the same *stackid*, - * discard the old one. - * - * The stack id retrieved is a 32 bit long integer handle which - * can be further combined with other data (including other stack - * ids) and used as a key into maps. This can be useful for - * generating a variety of graphs (such as flame graphs or off-cpu - * graphs). - * - * For walking a stack, this helper is an improvement over - * **bpf_probe_read**\ (), which can be used with unrolled loops - * but is not efficient and consumes a lot of eBPF instructions. - * Instead, **bpf_get_stackid**\ () can collect up to - * **PERF_MAX_STACK_DEPTH** both kernel and user frames. Note that - * this limit can be controlled with the **sysctl** program, and - * that it should be manually increased in order to profile long - * user stacks (such as stacks for Java programs). To do so, use: - * - * :: - * - * # sysctl kernel.perf_event_max_stack= - * - * Returns - * The positive or null stack id on success, or a negative error - * in case of failure. - */ -static long (*bpf_get_stackid)(void *ctx, void *map, __u64 flags) = (void *) 27; - -/* - * bpf_csum_diff - * - * Compute a checksum difference, from the raw buffer pointed by - * *from*, of length *from_size* (that must be a multiple of 4), - * towards the raw buffer pointed by *to*, of size *to_size* - * (same remark). An optional *seed* can be added to the value - * (this can be cascaded, the seed may come from a previous call - * to the helper). - * - * This is flexible enough to be used in several ways: - * - * * With *from_size* == 0, *to_size* > 0 and *seed* set to - * checksum, it can be used when pushing new data. - * * With *from_size* > 0, *to_size* == 0 and *seed* set to - * checksum, it can be used when removing data from a packet. - * * With *from_size* > 0, *to_size* > 0 and *seed* set to 0, it - * can be used to compute a diff. Note that *from_size* and - * *to_size* do not need to be equal. - * - * This helper can be used in combination with - * **bpf_l3_csum_replace**\ () and **bpf_l4_csum_replace**\ (), to - * which one can feed in the difference computed with - * **bpf_csum_diff**\ (). - * - * Returns - * The checksum result, or a negative error code in case of - * failure. - */ -static __s64 (*bpf_csum_diff)(__be32 *from, __u32 from_size, __be32 *to, __u32 to_size, __wsum seed) = (void *) 28; - -/* - * bpf_skb_get_tunnel_opt - * - * Retrieve tunnel options metadata for the packet associated to - * *skb*, and store the raw tunnel option data to the buffer *opt* - * of *size*. - * - * This helper can be used with encapsulation devices that can - * operate in "collect metadata" mode (please refer to the related - * note in the description of **bpf_skb_get_tunnel_key**\ () for - * more details). A particular example where this can be used is - * in combination with the Geneve encapsulation protocol, where it - * allows for pushing (with **bpf_skb_get_tunnel_opt**\ () helper) - * and retrieving arbitrary TLVs (Type-Length-Value headers) from - * the eBPF program. This allows for full customization of these - * headers. - * - * Returns - * The size of the option data retrieved. - */ -static long (*bpf_skb_get_tunnel_opt)(struct __sk_buff *skb, void *opt, __u32 size) = (void *) 29; - -/* - * bpf_skb_set_tunnel_opt - * - * Set tunnel options metadata for the packet associated to *skb* - * to the option data contained in the raw buffer *opt* of *size*. - * - * See also the description of the **bpf_skb_get_tunnel_opt**\ () - * helper for additional information. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_skb_set_tunnel_opt)(struct __sk_buff *skb, void *opt, __u32 size) = (void *) 30; - -/* - * bpf_skb_change_proto - * - * Change the protocol of the *skb* to *proto*. Currently - * supported are transition from IPv4 to IPv6, and from IPv6 to - * IPv4. The helper takes care of the groundwork for the - * transition, including resizing the socket buffer. The eBPF - * program is expected to fill the new headers, if any, via - * **skb_store_bytes**\ () and to recompute the checksums with - * **bpf_l3_csum_replace**\ () and **bpf_l4_csum_replace**\ - * (). The main case for this helper is to perform NAT64 - * operations out of an eBPF program. - * - * Internally, the GSO type is marked as dodgy so that headers are - * checked and segments are recalculated by the GSO/GRO engine. - * The size for GSO target is adapted as well. - * - * All values for *flags* are reserved for future usage, and must - * be left at zero. - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_skb_change_proto)(struct __sk_buff *skb, __be16 proto, __u64 flags) = (void *) 31; - -/* - * bpf_skb_change_type - * - * Change the packet type for the packet associated to *skb*. This - * comes down to setting *skb*\ **->pkt_type** to *type*, except - * the eBPF program does not have a write access to *skb*\ - * **->pkt_type** beside this helper. Using a helper here allows - * for graceful handling of errors. - * - * The major use case is to change incoming *skb*s to - * **PACKET_HOST** in a programmatic way instead of having to - * recirculate via **redirect**\ (..., **BPF_F_INGRESS**), for - * example. - * - * Note that *type* only allows certain values. At this time, they - * are: - * - * **PACKET_HOST** - * Packet is for us. - * **PACKET_BROADCAST** - * Send packet to all. - * **PACKET_MULTICAST** - * Send packet to group. - * **PACKET_OTHERHOST** - * Send packet to someone else. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_skb_change_type)(struct __sk_buff *skb, __u32 type) = (void *) 32; - -/* - * bpf_skb_under_cgroup - * - * Check whether *skb* is a descendant of the cgroup2 held by - * *map* of type **BPF_MAP_TYPE_CGROUP_ARRAY**, at *index*. - * - * Returns - * The return value depends on the result of the test, and can be: - * - * * 0, if the *skb* failed the cgroup2 descendant test. - * * 1, if the *skb* succeeded the cgroup2 descendant test. - * * A negative error code, if an error occurred. - */ -static long (*bpf_skb_under_cgroup)(struct __sk_buff *skb, void *map, __u32 index) = (void *) 33; - -/* - * bpf_get_hash_recalc - * - * Retrieve the hash of the packet, *skb*\ **->hash**. If it is - * not set, in particular if the hash was cleared due to mangling, - * recompute this hash. Later accesses to the hash can be done - * directly with *skb*\ **->hash**. - * - * Calling **bpf_set_hash_invalid**\ (), changing a packet - * prototype with **bpf_skb_change_proto**\ (), or calling - * **bpf_skb_store_bytes**\ () with the - * **BPF_F_INVALIDATE_HASH** are actions susceptible to clear - * the hash and to trigger a new computation for the next call to - * **bpf_get_hash_recalc**\ (). - * - * Returns - * The 32-bit hash. - */ -static __u32 (*bpf_get_hash_recalc)(struct __sk_buff *skb) = (void *) 34; - -/* - * bpf_get_current_task - * - * - * Returns - * A pointer to the current task struct. - */ -static __u64 (*bpf_get_current_task)(void) = (void *) 35; - -/* - * bpf_probe_write_user - * - * Attempt in a safe way to write *len* bytes from the buffer - * *src* to *dst* in memory. It only works for threads that are in - * user context, and *dst* must be a valid user space address. - * - * This helper should not be used to implement any kind of - * security mechanism because of TOC-TOU attacks, but rather to - * debug, divert, and manipulate execution of semi-cooperative - * processes. - * - * Keep in mind that this feature is meant for experiments, and it - * has a risk of crashing the system and running programs. - * Therefore, when an eBPF program using this helper is attached, - * a warning including PID and process name is printed to kernel - * logs. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_probe_write_user)(void *dst, const void *src, __u32 len) = (void *) 36; - -/* - * bpf_current_task_under_cgroup - * - * Check whether the probe is being run is the context of a given - * subset of the cgroup2 hierarchy. The cgroup2 to test is held by - * *map* of type **BPF_MAP_TYPE_CGROUP_ARRAY**, at *index*. - * - * Returns - * The return value depends on the result of the test, and can be: - * - * * 0, if current task belongs to the cgroup2. - * * 1, if current task does not belong to the cgroup2. - * * A negative error code, if an error occurred. - */ -static long (*bpf_current_task_under_cgroup)(void *map, __u32 index) = (void *) 37; - -/* - * bpf_skb_change_tail - * - * Resize (trim or grow) the packet associated to *skb* to the - * new *len*. The *flags* are reserved for future usage, and must - * be left at zero. - * - * The basic idea is that the helper performs the needed work to - * change the size of the packet, then the eBPF program rewrites - * the rest via helpers like **bpf_skb_store_bytes**\ (), - * **bpf_l3_csum_replace**\ (), **bpf_l3_csum_replace**\ () - * and others. This helper is a slow path utility intended for - * replies with control messages. And because it is targeted for - * slow path, the helper itself can afford to be slow: it - * implicitly linearizes, unclones and drops offloads from the - * *skb*. - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_skb_change_tail)(struct __sk_buff *skb, __u32 len, __u64 flags) = (void *) 38; - -/* - * bpf_skb_pull_data - * - * Pull in non-linear data in case the *skb* is non-linear and not - * all of *len* are part of the linear section. Make *len* bytes - * from *skb* readable and writable. If a zero value is passed for - * *len*, then the whole length of the *skb* is pulled. - * - * This helper is only needed for reading and writing with direct - * packet access. - * - * For direct packet access, testing that offsets to access - * are within packet boundaries (test on *skb*\ **->data_end**) is - * susceptible to fail if offsets are invalid, or if the requested - * data is in non-linear parts of the *skb*. On failure the - * program can just bail out, or in the case of a non-linear - * buffer, use a helper to make the data available. The - * **bpf_skb_load_bytes**\ () helper is a first solution to access - * the data. Another one consists in using **bpf_skb_pull_data** - * to pull in once the non-linear parts, then retesting and - * eventually access the data. - * - * At the same time, this also makes sure the *skb* is uncloned, - * which is a necessary condition for direct write. As this needs - * to be an invariant for the write part only, the verifier - * detects writes and adds a prologue that is calling - * **bpf_skb_pull_data()** to effectively unclone the *skb* from - * the very beginning in case it is indeed cloned. - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_skb_pull_data)(struct __sk_buff *skb, __u32 len) = (void *) 39; - -/* - * bpf_csum_update - * - * Add the checksum *csum* into *skb*\ **->csum** in case the - * driver has supplied a checksum for the entire packet into that - * field. Return an error otherwise. This helper is intended to be - * used in combination with **bpf_csum_diff**\ (), in particular - * when the checksum needs to be updated after data has been - * written into the packet through direct packet access. - * - * Returns - * The checksum on success, or a negative error code in case of - * failure. - */ -static __s64 (*bpf_csum_update)(struct __sk_buff *skb, __wsum csum) = (void *) 40; - -/* - * bpf_set_hash_invalid - * - * Invalidate the current *skb*\ **->hash**. It can be used after - * mangling on headers through direct packet access, in order to - * indicate that the hash is outdated and to trigger a - * recalculation the next time the kernel tries to access this - * hash or when the **bpf_get_hash_recalc**\ () helper is called. - * - */ -static void (*bpf_set_hash_invalid)(struct __sk_buff *skb) = (void *) 41; - -/* - * bpf_get_numa_node_id - * - * Return the id of the current NUMA node. The primary use case - * for this helper is the selection of sockets for the local NUMA - * node, when the program is attached to sockets using the - * **SO_ATTACH_REUSEPORT_EBPF** option (see also **socket(7)**), - * but the helper is also available to other eBPF program types, - * similarly to **bpf_get_smp_processor_id**\ (). - * - * Returns - * The id of current NUMA node. - */ -static long (*bpf_get_numa_node_id)(void) = (void *) 42; - -/* - * bpf_skb_change_head - * - * Grows headroom of packet associated to *skb* and adjusts the - * offset of the MAC header accordingly, adding *len* bytes of - * space. It automatically extends and reallocates memory as - * required. - * - * This helper can be used on a layer 3 *skb* to push a MAC header - * for redirection into a layer 2 device. - * - * All values for *flags* are reserved for future usage, and must - * be left at zero. - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_skb_change_head)(struct __sk_buff *skb, __u32 len, __u64 flags) = (void *) 43; - -/* - * bpf_xdp_adjust_head - * - * Adjust (move) *xdp_md*\ **->data** by *delta* bytes. Note that - * it is possible to use a negative value for *delta*. This helper - * can be used to prepare the packet for pushing or popping - * headers. - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_xdp_adjust_head)(struct xdp_md *xdp_md, int delta) = (void *) 44; - -/* - * bpf_probe_read_str - * - * Copy a NUL terminated string from an unsafe kernel address - * *unsafe_ptr* to *dst*. See **bpf_probe_read_kernel_str**\ () for - * more details. - * - * Generally, use **bpf_probe_read_user_str**\ () or - * **bpf_probe_read_kernel_str**\ () instead. - * - * Returns - * On success, the strictly positive length of the string, - * including the trailing NUL character. On error, a negative - * value. - */ -static long (*bpf_probe_read_str)(void *dst, __u32 size, const void *unsafe_ptr) = (void *) 45; - -/* - * bpf_get_socket_cookie - * - * If the **struct sk_buff** pointed by *skb* has a known socket, - * retrieve the cookie (generated by the kernel) of this socket. - * If no cookie has been set yet, generate a new cookie. Once - * generated, the socket cookie remains stable for the life of the - * socket. This helper can be useful for monitoring per socket - * networking traffic statistics as it provides a global socket - * identifier that can be assumed unique. - * - * Returns - * A 8-byte long unique number on success, or 0 if the socket - * field is missing inside *skb*. - */ -static __u64 (*bpf_get_socket_cookie)(void *ctx) = (void *) 46; - -/* - * bpf_get_socket_uid - * - * - * Returns - * The owner UID of the socket associated to *skb*. If the socket - * is **NULL**, or if it is not a full socket (i.e. if it is a - * time-wait or a request socket instead), **overflowuid** value - * is returned (note that **overflowuid** might also be the actual - * UID value for the socket). - */ -static __u32 (*bpf_get_socket_uid)(struct __sk_buff *skb) = (void *) 47; - -/* - * bpf_set_hash - * - * Set the full hash for *skb* (set the field *skb*\ **->hash**) - * to value *hash*. - * - * Returns - * 0 - */ -static long (*bpf_set_hash)(struct __sk_buff *skb, __u32 hash) = (void *) 48; - -/* - * bpf_setsockopt - * - * Emulate a call to **setsockopt()** on the socket associated to - * *bpf_socket*, which must be a full socket. The *level* at - * which the option resides and the name *optname* of the option - * must be specified, see **setsockopt(2)** for more information. - * The option value of length *optlen* is pointed by *optval*. - * - * *bpf_socket* should be one of the following: - * - * * **struct bpf_sock_ops** for **BPF_PROG_TYPE_SOCK_OPS**. - * * **struct bpf_sock_addr** for **BPF_CGROUP_INET4_CONNECT** - * and **BPF_CGROUP_INET6_CONNECT**. - * - * This helper actually implements a subset of **setsockopt()**. - * It supports the following *level*\ s: - * - * * **SOL_SOCKET**, which supports the following *optname*\ s: - * **SO_RCVBUF**, **SO_SNDBUF**, **SO_MAX_PACING_RATE**, - * **SO_PRIORITY**, **SO_RCVLOWAT**, **SO_MARK**, - * **SO_BINDTODEVICE**, **SO_KEEPALIVE**. - * * **IPPROTO_TCP**, which supports the following *optname*\ s: - * **TCP_CONGESTION**, **TCP_BPF_IW**, - * **TCP_BPF_SNDCWND_CLAMP**, **TCP_SAVE_SYN**, - * **TCP_KEEPIDLE**, **TCP_KEEPINTVL**, **TCP_KEEPCNT**, - * **TCP_SYNCNT**, **TCP_USER_TIMEOUT**, **TCP_NOTSENT_LOWAT**. - * * **IPPROTO_IP**, which supports *optname* **IP_TOS**. - * * **IPPROTO_IPV6**, which supports *optname* **IPV6_TCLASS**. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_setsockopt)(void *bpf_socket, int level, int optname, void *optval, int optlen) = (void *) 49; - -/* - * bpf_skb_adjust_room - * - * Grow or shrink the room for data in the packet associated to - * *skb* by *len_diff*, and according to the selected *mode*. - * - * By default, the helper will reset any offloaded checksum - * indicator of the skb to CHECKSUM_NONE. This can be avoided - * by the following flag: - * - * * **BPF_F_ADJ_ROOM_NO_CSUM_RESET**: Do not reset offloaded - * checksum data of the skb to CHECKSUM_NONE. - * - * There are two supported modes at this time: - * - * * **BPF_ADJ_ROOM_MAC**: Adjust room at the mac layer - * (room space is added or removed below the layer 2 header). - * - * * **BPF_ADJ_ROOM_NET**: Adjust room at the network layer - * (room space is added or removed below the layer 3 header). - * - * The following flags are supported at this time: - * - * * **BPF_F_ADJ_ROOM_FIXED_GSO**: Do not adjust gso_size. - * Adjusting mss in this way is not allowed for datagrams. - * - * * **BPF_F_ADJ_ROOM_ENCAP_L3_IPV4**, - * **BPF_F_ADJ_ROOM_ENCAP_L3_IPV6**: - * Any new space is reserved to hold a tunnel header. - * Configure skb offsets and other fields accordingly. - * - * * **BPF_F_ADJ_ROOM_ENCAP_L4_GRE**, - * **BPF_F_ADJ_ROOM_ENCAP_L4_UDP**: - * Use with ENCAP_L3 flags to further specify the tunnel type. - * - * * **BPF_F_ADJ_ROOM_ENCAP_L2**\ (*len*): - * Use with ENCAP_L3/L4 flags to further specify the tunnel - * type; *len* is the length of the inner MAC header. - * - * * **BPF_F_ADJ_ROOM_ENCAP_L2_ETH**: - * Use with BPF_F_ADJ_ROOM_ENCAP_L2 flag to further specify the - * L2 type as Ethernet. - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_skb_adjust_room)(struct __sk_buff *skb, __s32 len_diff, __u32 mode, __u64 flags) = (void *) 50; - -/* - * bpf_redirect_map - * - * Redirect the packet to the endpoint referenced by *map* at - * index *key*. Depending on its type, this *map* can contain - * references to net devices (for forwarding packets through other - * ports), or to CPUs (for redirecting XDP frames to another CPU; - * but this is only implemented for native XDP (with driver - * support) as of this writing). - * - * The lower two bits of *flags* are used as the return code if - * the map lookup fails. This is so that the return value can be - * one of the XDP program return codes up to **XDP_TX**, as chosen - * by the caller. The higher bits of *flags* can be set to - * BPF_F_BROADCAST or BPF_F_EXCLUDE_INGRESS as defined below. - * - * With BPF_F_BROADCAST the packet will be broadcasted to all the - * interfaces in the map, with BPF_F_EXCLUDE_INGRESS the ingress - * interface will be excluded when do broadcasting. - * - * See also **bpf_redirect**\ (), which only supports redirecting - * to an ifindex, but doesn't require a map to do so. - * - * Returns - * **XDP_REDIRECT** on success, or the value of the two lower bits - * of the *flags* argument on error. - */ -static long (*bpf_redirect_map)(void *map, __u32 key, __u64 flags) = (void *) 51; - -/* - * bpf_sk_redirect_map - * - * Redirect the packet to the socket referenced by *map* (of type - * **BPF_MAP_TYPE_SOCKMAP**) at index *key*. Both ingress and - * egress interfaces can be used for redirection. The - * **BPF_F_INGRESS** value in *flags* is used to make the - * distinction (ingress path is selected if the flag is present, - * egress path otherwise). This is the only flag supported for now. - * - * Returns - * **SK_PASS** on success, or **SK_DROP** on error. - */ -static long (*bpf_sk_redirect_map)(struct __sk_buff *skb, void *map, __u32 key, __u64 flags) = (void *) 52; - -/* - * bpf_sock_map_update - * - * Add an entry to, or update a *map* referencing sockets. The - * *skops* is used as a new value for the entry associated to - * *key*. *flags* is one of: - * - * **BPF_NOEXIST** - * The entry for *key* must not exist in the map. - * **BPF_EXIST** - * The entry for *key* must already exist in the map. - * **BPF_ANY** - * No condition on the existence of the entry for *key*. - * - * If the *map* has eBPF programs (parser and verdict), those will - * be inherited by the socket being added. If the socket is - * already attached to eBPF programs, this results in an error. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_sock_map_update)(struct bpf_sock_ops *skops, void *map, void *key, __u64 flags) = (void *) 53; - -/* - * bpf_xdp_adjust_meta - * - * Adjust the address pointed by *xdp_md*\ **->data_meta** by - * *delta* (which can be positive or negative). Note that this - * operation modifies the address stored in *xdp_md*\ **->data**, - * so the latter must be loaded only after the helper has been - * called. - * - * The use of *xdp_md*\ **->data_meta** is optional and programs - * are not required to use it. The rationale is that when the - * packet is processed with XDP (e.g. as DoS filter), it is - * possible to push further meta data along with it before passing - * to the stack, and to give the guarantee that an ingress eBPF - * program attached as a TC classifier on the same device can pick - * this up for further post-processing. Since TC works with socket - * buffers, it remains possible to set from XDP the **mark** or - * **priority** pointers, or other pointers for the socket buffer. - * Having this scratch space generic and programmable allows for - * more flexibility as the user is free to store whatever meta - * data they need. - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_xdp_adjust_meta)(struct xdp_md *xdp_md, int delta) = (void *) 54; - -/* - * bpf_perf_event_read_value - * - * Read the value of a perf event counter, and store it into *buf* - * of size *buf_size*. This helper relies on a *map* of type - * **BPF_MAP_TYPE_PERF_EVENT_ARRAY**. The nature of the perf event - * counter is selected when *map* is updated with perf event file - * descriptors. The *map* is an array whose size is the number of - * available CPUs, and each cell contains a value relative to one - * CPU. The value to retrieve is indicated by *flags*, that - * contains the index of the CPU to look up, masked with - * **BPF_F_INDEX_MASK**. Alternatively, *flags* can be set to - * **BPF_F_CURRENT_CPU** to indicate that the value for the - * current CPU should be retrieved. - * - * This helper behaves in a way close to - * **bpf_perf_event_read**\ () helper, save that instead of - * just returning the value observed, it fills the *buf* - * structure. This allows for additional data to be retrieved: in - * particular, the enabled and running times (in *buf*\ - * **->enabled** and *buf*\ **->running**, respectively) are - * copied. In general, **bpf_perf_event_read_value**\ () is - * recommended over **bpf_perf_event_read**\ (), which has some - * ABI issues and provides fewer functionalities. - * - * These values are interesting, because hardware PMU (Performance - * Monitoring Unit) counters are limited resources. When there are - * more PMU based perf events opened than available counters, - * kernel will multiplex these events so each event gets certain - * percentage (but not all) of the PMU time. In case that - * multiplexing happens, the number of samples or counter value - * will not reflect the case compared to when no multiplexing - * occurs. This makes comparison between different runs difficult. - * Typically, the counter value should be normalized before - * comparing to other experiments. The usual normalization is done - * as follows. - * - * :: - * - * normalized_counter = counter * t_enabled / t_running - * - * Where t_enabled is the time enabled for event and t_running is - * the time running for event since last normalization. The - * enabled and running times are accumulated since the perf event - * open. To achieve scaling factor between two invocations of an - * eBPF program, users can use CPU id as the key (which is - * typical for perf array usage model) to remember the previous - * value and do the calculation inside the eBPF program. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_perf_event_read_value)(void *map, __u64 flags, struct bpf_perf_event_value *buf, __u32 buf_size) = (void *) 55; - -/* - * bpf_perf_prog_read_value - * - * For en eBPF program attached to a perf event, retrieve the - * value of the event counter associated to *ctx* and store it in - * the structure pointed by *buf* and of size *buf_size*. Enabled - * and running times are also stored in the structure (see - * description of helper **bpf_perf_event_read_value**\ () for - * more details). - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_perf_prog_read_value)(struct bpf_perf_event_data *ctx, struct bpf_perf_event_value *buf, __u32 buf_size) = (void *) 56; - -/* - * bpf_getsockopt - * - * Emulate a call to **getsockopt()** on the socket associated to - * *bpf_socket*, which must be a full socket. The *level* at - * which the option resides and the name *optname* of the option - * must be specified, see **getsockopt(2)** for more information. - * The retrieved value is stored in the structure pointed by - * *opval* and of length *optlen*. - * - * *bpf_socket* should be one of the following: - * - * * **struct bpf_sock_ops** for **BPF_PROG_TYPE_SOCK_OPS**. - * * **struct bpf_sock_addr** for **BPF_CGROUP_INET4_CONNECT** - * and **BPF_CGROUP_INET6_CONNECT**. - * - * This helper actually implements a subset of **getsockopt()**. - * It supports the following *level*\ s: - * - * * **IPPROTO_TCP**, which supports *optname* - * **TCP_CONGESTION**. - * * **IPPROTO_IP**, which supports *optname* **IP_TOS**. - * * **IPPROTO_IPV6**, which supports *optname* **IPV6_TCLASS**. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_getsockopt)(void *bpf_socket, int level, int optname, void *optval, int optlen) = (void *) 57; - -/* - * bpf_override_return - * - * Used for error injection, this helper uses kprobes to override - * the return value of the probed function, and to set it to *rc*. - * The first argument is the context *regs* on which the kprobe - * works. - * - * This helper works by setting the PC (program counter) - * to an override function which is run in place of the original - * probed function. This means the probed function is not run at - * all. The replacement function just returns with the required - * value. - * - * This helper has security implications, and thus is subject to - * restrictions. It is only available if the kernel was compiled - * with the **CONFIG_BPF_KPROBE_OVERRIDE** configuration - * option, and in this case it only works on functions tagged with - * **ALLOW_ERROR_INJECTION** in the kernel code. - * - * Also, the helper is only available for the architectures having - * the CONFIG_FUNCTION_ERROR_INJECTION option. As of this writing, - * x86 architecture is the only one to support this feature. - * - * Returns - * 0 - */ -static long (*bpf_override_return)(struct pt_regs *regs, __u64 rc) = (void *) 58; - -/* - * bpf_sock_ops_cb_flags_set - * - * Attempt to set the value of the **bpf_sock_ops_cb_flags** field - * for the full TCP socket associated to *bpf_sock_ops* to - * *argval*. - * - * The primary use of this field is to determine if there should - * be calls to eBPF programs of type - * **BPF_PROG_TYPE_SOCK_OPS** at various points in the TCP - * code. A program of the same type can change its value, per - * connection and as necessary, when the connection is - * established. This field is directly accessible for reading, but - * this helper must be used for updates in order to return an - * error if an eBPF program tries to set a callback that is not - * supported in the current kernel. - * - * *argval* is a flag array which can combine these flags: - * - * * **BPF_SOCK_OPS_RTO_CB_FLAG** (retransmission time out) - * * **BPF_SOCK_OPS_RETRANS_CB_FLAG** (retransmission) - * * **BPF_SOCK_OPS_STATE_CB_FLAG** (TCP state change) - * * **BPF_SOCK_OPS_RTT_CB_FLAG** (every RTT) - * - * Therefore, this function can be used to clear a callback flag by - * setting the appropriate bit to zero. e.g. to disable the RTO - * callback: - * - * **bpf_sock_ops_cb_flags_set(bpf_sock,** - * **bpf_sock->bpf_sock_ops_cb_flags & ~BPF_SOCK_OPS_RTO_CB_FLAG)** - * - * Here are some examples of where one could call such eBPF - * program: - * - * * When RTO fires. - * * When a packet is retransmitted. - * * When the connection terminates. - * * When a packet is sent. - * * When a packet is received. - * - * Returns - * Code **-EINVAL** if the socket is not a full TCP socket; - * otherwise, a positive number containing the bits that could not - * be set is returned (which comes down to 0 if all bits were set - * as required). - */ -static long (*bpf_sock_ops_cb_flags_set)(struct bpf_sock_ops *bpf_sock, int argval) = (void *) 59; - -/* - * bpf_msg_redirect_map - * - * This helper is used in programs implementing policies at the - * socket level. If the message *msg* is allowed to pass (i.e. if - * the verdict eBPF program returns **SK_PASS**), redirect it to - * the socket referenced by *map* (of type - * **BPF_MAP_TYPE_SOCKMAP**) at index *key*. Both ingress and - * egress interfaces can be used for redirection. The - * **BPF_F_INGRESS** value in *flags* is used to make the - * distinction (ingress path is selected if the flag is present, - * egress path otherwise). This is the only flag supported for now. - * - * Returns - * **SK_PASS** on success, or **SK_DROP** on error. - */ -static long (*bpf_msg_redirect_map)(struct sk_msg_md *msg, void *map, __u32 key, __u64 flags) = (void *) 60; - -/* - * bpf_msg_apply_bytes - * - * For socket policies, apply the verdict of the eBPF program to - * the next *bytes* (number of bytes) of message *msg*. - * - * For example, this helper can be used in the following cases: - * - * * A single **sendmsg**\ () or **sendfile**\ () system call - * contains multiple logical messages that the eBPF program is - * supposed to read and for which it should apply a verdict. - * * An eBPF program only cares to read the first *bytes* of a - * *msg*. If the message has a large payload, then setting up - * and calling the eBPF program repeatedly for all bytes, even - * though the verdict is already known, would create unnecessary - * overhead. - * - * When called from within an eBPF program, the helper sets a - * counter internal to the BPF infrastructure, that is used to - * apply the last verdict to the next *bytes*. If *bytes* is - * smaller than the current data being processed from a - * **sendmsg**\ () or **sendfile**\ () system call, the first - * *bytes* will be sent and the eBPF program will be re-run with - * the pointer for start of data pointing to byte number *bytes* - * **+ 1**. If *bytes* is larger than the current data being - * processed, then the eBPF verdict will be applied to multiple - * **sendmsg**\ () or **sendfile**\ () calls until *bytes* are - * consumed. - * - * Note that if a socket closes with the internal counter holding - * a non-zero value, this is not a problem because data is not - * being buffered for *bytes* and is sent as it is received. - * - * Returns - * 0 - */ -static long (*bpf_msg_apply_bytes)(struct sk_msg_md *msg, __u32 bytes) = (void *) 61; - -/* - * bpf_msg_cork_bytes - * - * For socket policies, prevent the execution of the verdict eBPF - * program for message *msg* until *bytes* (byte number) have been - * accumulated. - * - * This can be used when one needs a specific number of bytes - * before a verdict can be assigned, even if the data spans - * multiple **sendmsg**\ () or **sendfile**\ () calls. The extreme - * case would be a user calling **sendmsg**\ () repeatedly with - * 1-byte long message segments. Obviously, this is bad for - * performance, but it is still valid. If the eBPF program needs - * *bytes* bytes to validate a header, this helper can be used to - * prevent the eBPF program to be called again until *bytes* have - * been accumulated. - * - * Returns - * 0 - */ -static long (*bpf_msg_cork_bytes)(struct sk_msg_md *msg, __u32 bytes) = (void *) 62; - -/* - * bpf_msg_pull_data - * - * For socket policies, pull in non-linear data from user space - * for *msg* and set pointers *msg*\ **->data** and *msg*\ - * **->data_end** to *start* and *end* bytes offsets into *msg*, - * respectively. - * - * If a program of type **BPF_PROG_TYPE_SK_MSG** is run on a - * *msg* it can only parse data that the (**data**, **data_end**) - * pointers have already consumed. For **sendmsg**\ () hooks this - * is likely the first scatterlist element. But for calls relying - * on the **sendpage** handler (e.g. **sendfile**\ ()) this will - * be the range (**0**, **0**) because the data is shared with - * user space and by default the objective is to avoid allowing - * user space to modify data while (or after) eBPF verdict is - * being decided. This helper can be used to pull in data and to - * set the start and end pointer to given values. Data will be - * copied if necessary (i.e. if data was not linear and if start - * and end pointers do not point to the same chunk). - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * All values for *flags* are reserved for future usage, and must - * be left at zero. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_msg_pull_data)(struct sk_msg_md *msg, __u32 start, __u32 end, __u64 flags) = (void *) 63; - -/* - * bpf_bind - * - * Bind the socket associated to *ctx* to the address pointed by - * *addr*, of length *addr_len*. This allows for making outgoing - * connection from the desired IP address, which can be useful for - * example when all processes inside a cgroup should use one - * single IP address on a host that has multiple IP configured. - * - * This helper works for IPv4 and IPv6, TCP and UDP sockets. The - * domain (*addr*\ **->sa_family**) must be **AF_INET** (or - * **AF_INET6**). It's advised to pass zero port (**sin_port** - * or **sin6_port**) which triggers IP_BIND_ADDRESS_NO_PORT-like - * behavior and lets the kernel efficiently pick up an unused - * port as long as 4-tuple is unique. Passing non-zero port might - * lead to degraded performance. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_bind)(struct bpf_sock_addr *ctx, struct sockaddr *addr, int addr_len) = (void *) 64; - -/* - * bpf_xdp_adjust_tail - * - * Adjust (move) *xdp_md*\ **->data_end** by *delta* bytes. It is - * possible to both shrink and grow the packet tail. - * Shrink done via *delta* being a negative integer. - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_xdp_adjust_tail)(struct xdp_md *xdp_md, int delta) = (void *) 65; - -/* - * bpf_skb_get_xfrm_state - * - * Retrieve the XFRM state (IP transform framework, see also - * **ip-xfrm(8)**) at *index* in XFRM "security path" for *skb*. - * - * The retrieved value is stored in the **struct bpf_xfrm_state** - * pointed by *xfrm_state* and of length *size*. - * - * All values for *flags* are reserved for future usage, and must - * be left at zero. - * - * This helper is available only if the kernel was compiled with - * **CONFIG_XFRM** configuration option. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_skb_get_xfrm_state)(struct __sk_buff *skb, __u32 index, struct bpf_xfrm_state *xfrm_state, __u32 size, __u64 flags) = (void *) 66; - -/* - * bpf_get_stack - * - * Return a user or a kernel stack in bpf program provided buffer. - * To achieve this, the helper needs *ctx*, which is a pointer - * to the context on which the tracing program is executed. - * To store the stacktrace, the bpf program provides *buf* with - * a nonnegative *size*. - * - * The last argument, *flags*, holds the number of stack frames to - * skip (from 0 to 255), masked with - * **BPF_F_SKIP_FIELD_MASK**. The next bits can be used to set - * the following flags: - * - * **BPF_F_USER_STACK** - * Collect a user space stack instead of a kernel stack. - * **BPF_F_USER_BUILD_ID** - * Collect buildid+offset instead of ips for user stack, - * only valid if **BPF_F_USER_STACK** is also specified. - * - * **bpf_get_stack**\ () can collect up to - * **PERF_MAX_STACK_DEPTH** both kernel and user frames, subject - * to sufficient large buffer size. Note that - * this limit can be controlled with the **sysctl** program, and - * that it should be manually increased in order to profile long - * user stacks (such as stacks for Java programs). To do so, use: - * - * :: - * - * # sysctl kernel.perf_event_max_stack= - * - * Returns - * A non-negative value equal to or less than *size* on success, - * or a negative error in case of failure. - */ -static long (*bpf_get_stack)(void *ctx, void *buf, __u32 size, __u64 flags) = (void *) 67; - -/* - * bpf_skb_load_bytes_relative - * - * This helper is similar to **bpf_skb_load_bytes**\ () in that - * it provides an easy way to load *len* bytes from *offset* - * from the packet associated to *skb*, into the buffer pointed - * by *to*. The difference to **bpf_skb_load_bytes**\ () is that - * a fifth argument *start_header* exists in order to select a - * base offset to start from. *start_header* can be one of: - * - * **BPF_HDR_START_MAC** - * Base offset to load data from is *skb*'s mac header. - * **BPF_HDR_START_NET** - * Base offset to load data from is *skb*'s network header. - * - * In general, "direct packet access" is the preferred method to - * access packet data, however, this helper is in particular useful - * in socket filters where *skb*\ **->data** does not always point - * to the start of the mac header and where "direct packet access" - * is not available. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_skb_load_bytes_relative)(const void *skb, __u32 offset, void *to, __u32 len, __u32 start_header) = (void *) 68; - -/* - * bpf_fib_lookup - * - * Do FIB lookup in kernel tables using parameters in *params*. - * If lookup is successful and result shows packet is to be - * forwarded, the neighbor tables are searched for the nexthop. - * If successful (ie., FIB lookup shows forwarding and nexthop - * is resolved), the nexthop address is returned in ipv4_dst - * or ipv6_dst based on family, smac is set to mac address of - * egress device, dmac is set to nexthop mac address, rt_metric - * is set to metric from route (IPv4/IPv6 only), and ifindex - * is set to the device index of the nexthop from the FIB lookup. - * - * *plen* argument is the size of the passed in struct. - * *flags* argument can be a combination of one or more of the - * following values: - * - * **BPF_FIB_LOOKUP_DIRECT** - * Do a direct table lookup vs full lookup using FIB - * rules. - * **BPF_FIB_LOOKUP_OUTPUT** - * Perform lookup from an egress perspective (default is - * ingress). - * - * *ctx* is either **struct xdp_md** for XDP programs or - * **struct sk_buff** tc cls_act programs. - * - * Returns - * * < 0 if any input argument is invalid - * * 0 on success (packet is forwarded, nexthop neighbor exists) - * * > 0 one of **BPF_FIB_LKUP_RET_** codes explaining why the - * packet is not forwarded or needs assist from full stack - * - * If lookup fails with BPF_FIB_LKUP_RET_FRAG_NEEDED, then the MTU - * was exceeded and output params->mtu_result contains the MTU. - */ -static long (*bpf_fib_lookup)(void *ctx, struct bpf_fib_lookup *params, int plen, __u32 flags) = (void *) 69; - -/* - * bpf_sock_hash_update - * - * Add an entry to, or update a sockhash *map* referencing sockets. - * The *skops* is used as a new value for the entry associated to - * *key*. *flags* is one of: - * - * **BPF_NOEXIST** - * The entry for *key* must not exist in the map. - * **BPF_EXIST** - * The entry for *key* must already exist in the map. - * **BPF_ANY** - * No condition on the existence of the entry for *key*. - * - * If the *map* has eBPF programs (parser and verdict), those will - * be inherited by the socket being added. If the socket is - * already attached to eBPF programs, this results in an error. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_sock_hash_update)(struct bpf_sock_ops *skops, void *map, void *key, __u64 flags) = (void *) 70; - -/* - * bpf_msg_redirect_hash - * - * This helper is used in programs implementing policies at the - * socket level. If the message *msg* is allowed to pass (i.e. if - * the verdict eBPF program returns **SK_PASS**), redirect it to - * the socket referenced by *map* (of type - * **BPF_MAP_TYPE_SOCKHASH**) using hash *key*. Both ingress and - * egress interfaces can be used for redirection. The - * **BPF_F_INGRESS** value in *flags* is used to make the - * distinction (ingress path is selected if the flag is present, - * egress path otherwise). This is the only flag supported for now. - * - * Returns - * **SK_PASS** on success, or **SK_DROP** on error. - */ -static long (*bpf_msg_redirect_hash)(struct sk_msg_md *msg, void *map, void *key, __u64 flags) = (void *) 71; - -/* - * bpf_sk_redirect_hash - * - * This helper is used in programs implementing policies at the - * skb socket level. If the sk_buff *skb* is allowed to pass (i.e. - * if the verdict eBPF program returns **SK_PASS**), redirect it - * to the socket referenced by *map* (of type - * **BPF_MAP_TYPE_SOCKHASH**) using hash *key*. Both ingress and - * egress interfaces can be used for redirection. The - * **BPF_F_INGRESS** value in *flags* is used to make the - * distinction (ingress path is selected if the flag is present, - * egress otherwise). This is the only flag supported for now. - * - * Returns - * **SK_PASS** on success, or **SK_DROP** on error. - */ -static long (*bpf_sk_redirect_hash)(struct __sk_buff *skb, void *map, void *key, __u64 flags) = (void *) 72; - -/* - * bpf_lwt_push_encap - * - * Encapsulate the packet associated to *skb* within a Layer 3 - * protocol header. This header is provided in the buffer at - * address *hdr*, with *len* its size in bytes. *type* indicates - * the protocol of the header and can be one of: - * - * **BPF_LWT_ENCAP_SEG6** - * IPv6 encapsulation with Segment Routing Header - * (**struct ipv6_sr_hdr**). *hdr* only contains the SRH, - * the IPv6 header is computed by the kernel. - * **BPF_LWT_ENCAP_SEG6_INLINE** - * Only works if *skb* contains an IPv6 packet. Insert a - * Segment Routing Header (**struct ipv6_sr_hdr**) inside - * the IPv6 header. - * **BPF_LWT_ENCAP_IP** - * IP encapsulation (GRE/GUE/IPIP/etc). The outer header - * must be IPv4 or IPv6, followed by zero or more - * additional headers, up to **LWT_BPF_MAX_HEADROOM** - * total bytes in all prepended headers. Please note that - * if **skb_is_gso**\ (*skb*) is true, no more than two - * headers can be prepended, and the inner header, if - * present, should be either GRE or UDP/GUE. - * - * **BPF_LWT_ENCAP_SEG6**\ \* types can be called by BPF programs - * of type **BPF_PROG_TYPE_LWT_IN**; **BPF_LWT_ENCAP_IP** type can - * be called by bpf programs of types **BPF_PROG_TYPE_LWT_IN** and - * **BPF_PROG_TYPE_LWT_XMIT**. - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_lwt_push_encap)(struct __sk_buff *skb, __u32 type, void *hdr, __u32 len) = (void *) 73; - -/* - * bpf_lwt_seg6_store_bytes - * - * Store *len* bytes from address *from* into the packet - * associated to *skb*, at *offset*. Only the flags, tag and TLVs - * inside the outermost IPv6 Segment Routing Header can be - * modified through this helper. - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_lwt_seg6_store_bytes)(struct __sk_buff *skb, __u32 offset, const void *from, __u32 len) = (void *) 74; - -/* - * bpf_lwt_seg6_adjust_srh - * - * Adjust the size allocated to TLVs in the outermost IPv6 - * Segment Routing Header contained in the packet associated to - * *skb*, at position *offset* by *delta* bytes. Only offsets - * after the segments are accepted. *delta* can be as well - * positive (growing) as negative (shrinking). - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_lwt_seg6_adjust_srh)(struct __sk_buff *skb, __u32 offset, __s32 delta) = (void *) 75; - -/* - * bpf_lwt_seg6_action - * - * Apply an IPv6 Segment Routing action of type *action* to the - * packet associated to *skb*. Each action takes a parameter - * contained at address *param*, and of length *param_len* bytes. - * *action* can be one of: - * - * **SEG6_LOCAL_ACTION_END_X** - * End.X action: Endpoint with Layer-3 cross-connect. - * Type of *param*: **struct in6_addr**. - * **SEG6_LOCAL_ACTION_END_T** - * End.T action: Endpoint with specific IPv6 table lookup. - * Type of *param*: **int**. - * **SEG6_LOCAL_ACTION_END_B6** - * End.B6 action: Endpoint bound to an SRv6 policy. - * Type of *param*: **struct ipv6_sr_hdr**. - * **SEG6_LOCAL_ACTION_END_B6_ENCAP** - * End.B6.Encap action: Endpoint bound to an SRv6 - * encapsulation policy. - * Type of *param*: **struct ipv6_sr_hdr**. - * - * A call to this helper is susceptible to change the underlying - * packet buffer. Therefore, at load time, all checks on pointers - * previously done by the verifier are invalidated and must be - * performed again, if the helper is used in combination with - * direct packet access. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_lwt_seg6_action)(struct __sk_buff *skb, __u32 action, void *param, __u32 param_len) = (void *) 76; - -/* - * bpf_rc_repeat - * - * This helper is used in programs implementing IR decoding, to - * report a successfully decoded repeat key message. This delays - * the generation of a key up event for previously generated - * key down event. - * - * Some IR protocols like NEC have a special IR message for - * repeating last button, for when a button is held down. - * - * The *ctx* should point to the lirc sample as passed into - * the program. - * - * This helper is only available is the kernel was compiled with - * the **CONFIG_BPF_LIRC_MODE2** configuration option set to - * "**y**". - * - * Returns - * 0 - */ -static long (*bpf_rc_repeat)(void *ctx) = (void *) 77; - -/* - * bpf_rc_keydown - * - * This helper is used in programs implementing IR decoding, to - * report a successfully decoded key press with *scancode*, - * *toggle* value in the given *protocol*. The scancode will be - * translated to a keycode using the rc keymap, and reported as - * an input key down event. After a period a key up event is - * generated. This period can be extended by calling either - * **bpf_rc_keydown**\ () again with the same values, or calling - * **bpf_rc_repeat**\ (). - * - * Some protocols include a toggle bit, in case the button was - * released and pressed again between consecutive scancodes. - * - * The *ctx* should point to the lirc sample as passed into - * the program. - * - * The *protocol* is the decoded protocol number (see - * **enum rc_proto** for some predefined values). - * - * This helper is only available is the kernel was compiled with - * the **CONFIG_BPF_LIRC_MODE2** configuration option set to - * "**y**". - * - * Returns - * 0 - */ -static long (*bpf_rc_keydown)(void *ctx, __u32 protocol, __u64 scancode, __u32 toggle) = (void *) 78; - -/* - * bpf_skb_cgroup_id - * - * Return the cgroup v2 id of the socket associated with the *skb*. - * This is roughly similar to the **bpf_get_cgroup_classid**\ () - * helper for cgroup v1 by providing a tag resp. identifier that - * can be matched on or used for map lookups e.g. to implement - * policy. The cgroup v2 id of a given path in the hierarchy is - * exposed in user space through the f_handle API in order to get - * to the same 64-bit id. - * - * This helper can be used on TC egress path, but not on ingress, - * and is available only if the kernel was compiled with the - * **CONFIG_SOCK_CGROUP_DATA** configuration option. - * - * Returns - * The id is returned or 0 in case the id could not be retrieved. - */ -static __u64 (*bpf_skb_cgroup_id)(struct __sk_buff *skb) = (void *) 79; - -/* - * bpf_get_current_cgroup_id - * - * - * Returns - * A 64-bit integer containing the current cgroup id based - * on the cgroup within which the current task is running. - */ -static __u64 (*bpf_get_current_cgroup_id)(void) = (void *) 80; - -/* - * bpf_get_local_storage - * - * Get the pointer to the local storage area. - * The type and the size of the local storage is defined - * by the *map* argument. - * The *flags* meaning is specific for each map type, - * and has to be 0 for cgroup local storage. - * - * Depending on the BPF program type, a local storage area - * can be shared between multiple instances of the BPF program, - * running simultaneously. - * - * A user should care about the synchronization by himself. - * For example, by using the **BPF_ATOMIC** instructions to alter - * the shared data. - * - * Returns - * A pointer to the local storage area. - */ -static void *(*bpf_get_local_storage)(void *map, __u64 flags) = (void *) 81; - -/* - * bpf_sk_select_reuseport - * - * Select a **SO_REUSEPORT** socket from a - * **BPF_MAP_TYPE_REUSEPORT_SOCKARRAY** *map*. - * It checks the selected socket is matching the incoming - * request in the socket buffer. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_sk_select_reuseport)(struct sk_reuseport_md *reuse, void *map, void *key, __u64 flags) = (void *) 82; - -/* - * bpf_skb_ancestor_cgroup_id - * - * Return id of cgroup v2 that is ancestor of cgroup associated - * with the *skb* at the *ancestor_level*. The root cgroup is at - * *ancestor_level* zero and each step down the hierarchy - * increments the level. If *ancestor_level* == level of cgroup - * associated with *skb*, then return value will be same as that - * of **bpf_skb_cgroup_id**\ (). - * - * The helper is useful to implement policies based on cgroups - * that are upper in hierarchy than immediate cgroup associated - * with *skb*. - * - * The format of returned id and helper limitations are same as in - * **bpf_skb_cgroup_id**\ (). - * - * Returns - * The id is returned or 0 in case the id could not be retrieved. - */ -static __u64 (*bpf_skb_ancestor_cgroup_id)(struct __sk_buff *skb, int ancestor_level) = (void *) 83; - -/* - * bpf_sk_lookup_tcp - * - * Look for TCP socket matching *tuple*, optionally in a child - * network namespace *netns*. The return value must be checked, - * and if non-**NULL**, released via **bpf_sk_release**\ (). - * - * The *ctx* should point to the context of the program, such as - * the skb or socket (depending on the hook in use). This is used - * to determine the base network namespace for the lookup. - * - * *tuple_size* must be one of: - * - * **sizeof**\ (*tuple*\ **->ipv4**) - * Look for an IPv4 socket. - * **sizeof**\ (*tuple*\ **->ipv6**) - * Look for an IPv6 socket. - * - * If the *netns* is a negative signed 32-bit integer, then the - * socket lookup table in the netns associated with the *ctx* - * will be used. For the TC hooks, this is the netns of the device - * in the skb. For socket hooks, this is the netns of the socket. - * If *netns* is any other signed 32-bit value greater than or - * equal to zero then it specifies the ID of the netns relative to - * the netns associated with the *ctx*. *netns* values beyond the - * range of 32-bit integers are reserved for future use. - * - * All values for *flags* are reserved for future usage, and must - * be left at zero. - * - * This helper is available only if the kernel was compiled with - * **CONFIG_NET** configuration option. - * - * Returns - * Pointer to **struct bpf_sock**, or **NULL** in case of failure. - * For sockets with reuseport option, the **struct bpf_sock** - * result is from *reuse*\ **->socks**\ [] using the hash of the - * tuple. - */ -static struct bpf_sock *(*bpf_sk_lookup_tcp)(void *ctx, struct bpf_sock_tuple *tuple, __u32 tuple_size, __u64 netns, __u64 flags) = (void *) 84; - -/* - * bpf_sk_lookup_udp - * - * Look for UDP socket matching *tuple*, optionally in a child - * network namespace *netns*. The return value must be checked, - * and if non-**NULL**, released via **bpf_sk_release**\ (). - * - * The *ctx* should point to the context of the program, such as - * the skb or socket (depending on the hook in use). This is used - * to determine the base network namespace for the lookup. - * - * *tuple_size* must be one of: - * - * **sizeof**\ (*tuple*\ **->ipv4**) - * Look for an IPv4 socket. - * **sizeof**\ (*tuple*\ **->ipv6**) - * Look for an IPv6 socket. - * - * If the *netns* is a negative signed 32-bit integer, then the - * socket lookup table in the netns associated with the *ctx* - * will be used. For the TC hooks, this is the netns of the device - * in the skb. For socket hooks, this is the netns of the socket. - * If *netns* is any other signed 32-bit value greater than or - * equal to zero then it specifies the ID of the netns relative to - * the netns associated with the *ctx*. *netns* values beyond the - * range of 32-bit integers are reserved for future use. - * - * All values for *flags* are reserved for future usage, and must - * be left at zero. - * - * This helper is available only if the kernel was compiled with - * **CONFIG_NET** configuration option. - * - * Returns - * Pointer to **struct bpf_sock**, or **NULL** in case of failure. - * For sockets with reuseport option, the **struct bpf_sock** - * result is from *reuse*\ **->socks**\ [] using the hash of the - * tuple. - */ -static struct bpf_sock *(*bpf_sk_lookup_udp)(void *ctx, struct bpf_sock_tuple *tuple, __u32 tuple_size, __u64 netns, __u64 flags) = (void *) 85; - -/* - * bpf_sk_release - * - * Release the reference held by *sock*. *sock* must be a - * non-**NULL** pointer that was returned from - * **bpf_sk_lookup_xxx**\ (). - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_sk_release)(void *sock) = (void *) 86; - -/* - * bpf_map_push_elem - * - * Push an element *value* in *map*. *flags* is one of: - * - * **BPF_EXIST** - * If the queue/stack is full, the oldest element is - * removed to make room for this. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_map_push_elem)(void *map, const void *value, __u64 flags) = (void *) 87; - -/* - * bpf_map_pop_elem - * - * Pop an element from *map*. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_map_pop_elem)(void *map, void *value) = (void *) 88; - -/* - * bpf_map_peek_elem - * - * Get an element from *map* without removing it. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_map_peek_elem)(void *map, void *value) = (void *) 89; - -/* - * bpf_msg_push_data - * - * For socket policies, insert *len* bytes into *msg* at offset - * *start*. - * - * If a program of type **BPF_PROG_TYPE_SK_MSG** is run on a - * *msg* it may want to insert metadata or options into the *msg*. - * This can later be read and used by any of the lower layer BPF - * hooks. - * - * This helper may fail if under memory pressure (a malloc - * fails) in these cases BPF programs will get an appropriate - * error and BPF programs will need to handle them. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_msg_push_data)(struct sk_msg_md *msg, __u32 start, __u32 len, __u64 flags) = (void *) 90; - -/* - * bpf_msg_pop_data - * - * Will remove *len* bytes from a *msg* starting at byte *start*. - * This may result in **ENOMEM** errors under certain situations if - * an allocation and copy are required due to a full ring buffer. - * However, the helper will try to avoid doing the allocation - * if possible. Other errors can occur if input parameters are - * invalid either due to *start* byte not being valid part of *msg* - * payload and/or *pop* value being to large. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_msg_pop_data)(struct sk_msg_md *msg, __u32 start, __u32 len, __u64 flags) = (void *) 91; - -/* - * bpf_rc_pointer_rel - * - * This helper is used in programs implementing IR decoding, to - * report a successfully decoded pointer movement. - * - * The *ctx* should point to the lirc sample as passed into - * the program. - * - * This helper is only available is the kernel was compiled with - * the **CONFIG_BPF_LIRC_MODE2** configuration option set to - * "**y**". - * - * Returns - * 0 - */ -static long (*bpf_rc_pointer_rel)(void *ctx, __s32 rel_x, __s32 rel_y) = (void *) 92; - -/* - * bpf_spin_lock - * - * Acquire a spinlock represented by the pointer *lock*, which is - * stored as part of a value of a map. Taking the lock allows to - * safely update the rest of the fields in that value. The - * spinlock can (and must) later be released with a call to - * **bpf_spin_unlock**\ (\ *lock*\ ). - * - * Spinlocks in BPF programs come with a number of restrictions - * and constraints: - * - * * **bpf_spin_lock** objects are only allowed inside maps of - * types **BPF_MAP_TYPE_HASH** and **BPF_MAP_TYPE_ARRAY** (this - * list could be extended in the future). - * * BTF description of the map is mandatory. - * * The BPF program can take ONE lock at a time, since taking two - * or more could cause dead locks. - * * Only one **struct bpf_spin_lock** is allowed per map element. - * * When the lock is taken, calls (either BPF to BPF or helpers) - * are not allowed. - * * The **BPF_LD_ABS** and **BPF_LD_IND** instructions are not - * allowed inside a spinlock-ed region. - * * The BPF program MUST call **bpf_spin_unlock**\ () to release - * the lock, on all execution paths, before it returns. - * * The BPF program can access **struct bpf_spin_lock** only via - * the **bpf_spin_lock**\ () and **bpf_spin_unlock**\ () - * helpers. Loading or storing data into the **struct - * bpf_spin_lock** *lock*\ **;** field of a map is not allowed. - * * To use the **bpf_spin_lock**\ () helper, the BTF description - * of the map value must be a struct and have **struct - * bpf_spin_lock** *anyname*\ **;** field at the top level. - * Nested lock inside another struct is not allowed. - * * The **struct bpf_spin_lock** *lock* field in a map value must - * be aligned on a multiple of 4 bytes in that value. - * * Syscall with command **BPF_MAP_LOOKUP_ELEM** does not copy - * the **bpf_spin_lock** field to user space. - * * Syscall with command **BPF_MAP_UPDATE_ELEM**, or update from - * a BPF program, do not update the **bpf_spin_lock** field. - * * **bpf_spin_lock** cannot be on the stack or inside a - * networking packet (it can only be inside of a map values). - * * **bpf_spin_lock** is available to root only. - * * Tracing programs and socket filter programs cannot use - * **bpf_spin_lock**\ () due to insufficient preemption checks - * (but this may change in the future). - * * **bpf_spin_lock** is not allowed in inner maps of map-in-map. - * - * Returns - * 0 - */ -static long (*bpf_spin_lock)(struct bpf_spin_lock *lock) = (void *) 93; - -/* - * bpf_spin_unlock - * - * Release the *lock* previously locked by a call to - * **bpf_spin_lock**\ (\ *lock*\ ). - * - * Returns - * 0 - */ -static long (*bpf_spin_unlock)(struct bpf_spin_lock *lock) = (void *) 94; - -/* - * bpf_sk_fullsock - * - * This helper gets a **struct bpf_sock** pointer such - * that all the fields in this **bpf_sock** can be accessed. - * - * Returns - * A **struct bpf_sock** pointer on success, or **NULL** in - * case of failure. - */ -static struct bpf_sock *(*bpf_sk_fullsock)(struct bpf_sock *sk) = (void *) 95; - -/* - * bpf_tcp_sock - * - * This helper gets a **struct bpf_tcp_sock** pointer from a - * **struct bpf_sock** pointer. - * - * Returns - * A **struct bpf_tcp_sock** pointer on success, or **NULL** in - * case of failure. - */ -static struct bpf_tcp_sock *(*bpf_tcp_sock)(struct bpf_sock *sk) = (void *) 96; - -/* - * bpf_skb_ecn_set_ce - * - * Set ECN (Explicit Congestion Notification) field of IP header - * to **CE** (Congestion Encountered) if current value is **ECT** - * (ECN Capable Transport). Otherwise, do nothing. Works with IPv6 - * and IPv4. - * - * Returns - * 1 if the **CE** flag is set (either by the current helper call - * or because it was already present), 0 if it is not set. - */ -static long (*bpf_skb_ecn_set_ce)(struct __sk_buff *skb) = (void *) 97; - -/* - * bpf_get_listener_sock - * - * Return a **struct bpf_sock** pointer in **TCP_LISTEN** state. - * **bpf_sk_release**\ () is unnecessary and not allowed. - * - * Returns - * A **struct bpf_sock** pointer on success, or **NULL** in - * case of failure. - */ -static struct bpf_sock *(*bpf_get_listener_sock)(struct bpf_sock *sk) = (void *) 98; - -/* - * bpf_skc_lookup_tcp - * - * Look for TCP socket matching *tuple*, optionally in a child - * network namespace *netns*. The return value must be checked, - * and if non-**NULL**, released via **bpf_sk_release**\ (). - * - * This function is identical to **bpf_sk_lookup_tcp**\ (), except - * that it also returns timewait or request sockets. Use - * **bpf_sk_fullsock**\ () or **bpf_tcp_sock**\ () to access the - * full structure. - * - * This helper is available only if the kernel was compiled with - * **CONFIG_NET** configuration option. - * - * Returns - * Pointer to **struct bpf_sock**, or **NULL** in case of failure. - * For sockets with reuseport option, the **struct bpf_sock** - * result is from *reuse*\ **->socks**\ [] using the hash of the - * tuple. - */ -static struct bpf_sock *(*bpf_skc_lookup_tcp)(void *ctx, struct bpf_sock_tuple *tuple, __u32 tuple_size, __u64 netns, __u64 flags) = (void *) 99; - -/* - * bpf_tcp_check_syncookie - * - * Check whether *iph* and *th* contain a valid SYN cookie ACK for - * the listening socket in *sk*. - * - * *iph* points to the start of the IPv4 or IPv6 header, while - * *iph_len* contains **sizeof**\ (**struct iphdr**) or - * **sizeof**\ (**struct ip6hdr**). - * - * *th* points to the start of the TCP header, while *th_len* - * contains **sizeof**\ (**struct tcphdr**). - * - * Returns - * 0 if *iph* and *th* are a valid SYN cookie ACK, or a negative - * error otherwise. - */ -static long (*bpf_tcp_check_syncookie)(void *sk, void *iph, __u32 iph_len, struct tcphdr *th, __u32 th_len) = (void *) 100; - -/* - * bpf_sysctl_get_name - * - * Get name of sysctl in /proc/sys/ and copy it into provided by - * program buffer *buf* of size *buf_len*. - * - * The buffer is always NUL terminated, unless it's zero-sized. - * - * If *flags* is zero, full name (e.g. "net/ipv4/tcp_mem") is - * copied. Use **BPF_F_SYSCTL_BASE_NAME** flag to copy base name - * only (e.g. "tcp_mem"). - * - * Returns - * Number of character copied (not including the trailing NUL). - * - * **-E2BIG** if the buffer wasn't big enough (*buf* will contain - * truncated name in this case). - */ -static long (*bpf_sysctl_get_name)(struct bpf_sysctl *ctx, char *buf, unsigned long buf_len, __u64 flags) = (void *) 101; - -/* - * bpf_sysctl_get_current_value - * - * Get current value of sysctl as it is presented in /proc/sys - * (incl. newline, etc), and copy it as a string into provided - * by program buffer *buf* of size *buf_len*. - * - * The whole value is copied, no matter what file position user - * space issued e.g. sys_read at. - * - * The buffer is always NUL terminated, unless it's zero-sized. - * - * Returns - * Number of character copied (not including the trailing NUL). - * - * **-E2BIG** if the buffer wasn't big enough (*buf* will contain - * truncated name in this case). - * - * **-EINVAL** if current value was unavailable, e.g. because - * sysctl is uninitialized and read returns -EIO for it. - */ -static long (*bpf_sysctl_get_current_value)(struct bpf_sysctl *ctx, char *buf, unsigned long buf_len) = (void *) 102; - -/* - * bpf_sysctl_get_new_value - * - * Get new value being written by user space to sysctl (before - * the actual write happens) and copy it as a string into - * provided by program buffer *buf* of size *buf_len*. - * - * User space may write new value at file position > 0. - * - * The buffer is always NUL terminated, unless it's zero-sized. - * - * Returns - * Number of character copied (not including the trailing NUL). - * - * **-E2BIG** if the buffer wasn't big enough (*buf* will contain - * truncated name in this case). - * - * **-EINVAL** if sysctl is being read. - */ -static long (*bpf_sysctl_get_new_value)(struct bpf_sysctl *ctx, char *buf, unsigned long buf_len) = (void *) 103; - -/* - * bpf_sysctl_set_new_value - * - * Override new value being written by user space to sysctl with - * value provided by program in buffer *buf* of size *buf_len*. - * - * *buf* should contain a string in same form as provided by user - * space on sysctl write. - * - * User space may write new value at file position > 0. To override - * the whole sysctl value file position should be set to zero. - * - * Returns - * 0 on success. - * - * **-E2BIG** if the *buf_len* is too big. - * - * **-EINVAL** if sysctl is being read. - */ -static long (*bpf_sysctl_set_new_value)(struct bpf_sysctl *ctx, const char *buf, unsigned long buf_len) = (void *) 104; - -/* - * bpf_strtol - * - * Convert the initial part of the string from buffer *buf* of - * size *buf_len* to a long integer according to the given base - * and save the result in *res*. - * - * The string may begin with an arbitrary amount of white space - * (as determined by **isspace**\ (3)) followed by a single - * optional '**-**' sign. - * - * Five least significant bits of *flags* encode base, other bits - * are currently unused. - * - * Base must be either 8, 10, 16 or 0 to detect it automatically - * similar to user space **strtol**\ (3). - * - * Returns - * Number of characters consumed on success. Must be positive but - * no more than *buf_len*. - * - * **-EINVAL** if no valid digits were found or unsupported base - * was provided. - * - * **-ERANGE** if resulting value was out of range. - */ -static long (*bpf_strtol)(const char *buf, unsigned long buf_len, __u64 flags, long *res) = (void *) 105; - -/* - * bpf_strtoul - * - * Convert the initial part of the string from buffer *buf* of - * size *buf_len* to an unsigned long integer according to the - * given base and save the result in *res*. - * - * The string may begin with an arbitrary amount of white space - * (as determined by **isspace**\ (3)). - * - * Five least significant bits of *flags* encode base, other bits - * are currently unused. - * - * Base must be either 8, 10, 16 or 0 to detect it automatically - * similar to user space **strtoul**\ (3). - * - * Returns - * Number of characters consumed on success. Must be positive but - * no more than *buf_len*. - * - * **-EINVAL** if no valid digits were found or unsupported base - * was provided. - * - * **-ERANGE** if resulting value was out of range. - */ -static long (*bpf_strtoul)(const char *buf, unsigned long buf_len, __u64 flags, unsigned long *res) = (void *) 106; - -/* - * bpf_sk_storage_get - * - * Get a bpf-local-storage from a *sk*. - * - * Logically, it could be thought of getting the value from - * a *map* with *sk* as the **key**. From this - * perspective, the usage is not much different from - * **bpf_map_lookup_elem**\ (*map*, **&**\ *sk*) except this - * helper enforces the key must be a full socket and the map must - * be a **BPF_MAP_TYPE_SK_STORAGE** also. - * - * Underneath, the value is stored locally at *sk* instead of - * the *map*. The *map* is used as the bpf-local-storage - * "type". The bpf-local-storage "type" (i.e. the *map*) is - * searched against all bpf-local-storages residing at *sk*. - * - * *sk* is a kernel **struct sock** pointer for LSM program. - * *sk* is a **struct bpf_sock** pointer for other program types. - * - * An optional *flags* (**BPF_SK_STORAGE_GET_F_CREATE**) can be - * used such that a new bpf-local-storage will be - * created if one does not exist. *value* can be used - * together with **BPF_SK_STORAGE_GET_F_CREATE** to specify - * the initial value of a bpf-local-storage. If *value* is - * **NULL**, the new bpf-local-storage will be zero initialized. - * - * Returns - * A bpf-local-storage pointer is returned on success. - * - * **NULL** if not found or there was an error in adding - * a new bpf-local-storage. - */ -static void *(*bpf_sk_storage_get)(void *map, void *sk, void *value, __u64 flags) = (void *) 107; - -/* - * bpf_sk_storage_delete - * - * Delete a bpf-local-storage from a *sk*. - * - * Returns - * 0 on success. - * - * **-ENOENT** if the bpf-local-storage cannot be found. - * **-EINVAL** if sk is not a fullsock (e.g. a request_sock). - */ -static long (*bpf_sk_storage_delete)(void *map, void *sk) = (void *) 108; - -/* - * bpf_send_signal - * - * Send signal *sig* to the process of the current task. - * The signal may be delivered to any of this process's threads. - * - * Returns - * 0 on success or successfully queued. - * - * **-EBUSY** if work queue under nmi is full. - * - * **-EINVAL** if *sig* is invalid. - * - * **-EPERM** if no permission to send the *sig*. - * - * **-EAGAIN** if bpf program can try again. - */ -static long (*bpf_send_signal)(__u32 sig) = (void *) 109; - -/* - * bpf_tcp_gen_syncookie - * - * Try to issue a SYN cookie for the packet with corresponding - * IP/TCP headers, *iph* and *th*, on the listening socket in *sk*. - * - * *iph* points to the start of the IPv4 or IPv6 header, while - * *iph_len* contains **sizeof**\ (**struct iphdr**) or - * **sizeof**\ (**struct ip6hdr**). - * - * *th* points to the start of the TCP header, while *th_len* - * contains the length of the TCP header. - * - * Returns - * On success, lower 32 bits hold the generated SYN cookie in - * followed by 16 bits which hold the MSS value for that cookie, - * and the top 16 bits are unused. - * - * On failure, the returned value is one of the following: - * - * **-EINVAL** SYN cookie cannot be issued due to error - * - * **-ENOENT** SYN cookie should not be issued (no SYN flood) - * - * **-EOPNOTSUPP** kernel configuration does not enable SYN cookies - * - * **-EPROTONOSUPPORT** IP packet version is not 4 or 6 - */ -static __s64 (*bpf_tcp_gen_syncookie)(void *sk, void *iph, __u32 iph_len, struct tcphdr *th, __u32 th_len) = (void *) 110; - -/* - * bpf_skb_output - * - * Write raw *data* blob into a special BPF perf event held by - * *map* of type **BPF_MAP_TYPE_PERF_EVENT_ARRAY**. This perf - * event must have the following attributes: **PERF_SAMPLE_RAW** - * as **sample_type**, **PERF_TYPE_SOFTWARE** as **type**, and - * **PERF_COUNT_SW_BPF_OUTPUT** as **config**. - * - * The *flags* are used to indicate the index in *map* for which - * the value must be put, masked with **BPF_F_INDEX_MASK**. - * Alternatively, *flags* can be set to **BPF_F_CURRENT_CPU** - * to indicate that the index of the current CPU core should be - * used. - * - * The value to write, of *size*, is passed through eBPF stack and - * pointed by *data*. - * - * *ctx* is a pointer to in-kernel struct sk_buff. - * - * This helper is similar to **bpf_perf_event_output**\ () but - * restricted to raw_tracepoint bpf programs. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_skb_output)(void *ctx, void *map, __u64 flags, void *data, __u64 size) = (void *) 111; - -/* - * bpf_probe_read_user - * - * Safely attempt to read *size* bytes from user space address - * *unsafe_ptr* and store the data in *dst*. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_probe_read_user)(void *dst, __u32 size, const void *unsafe_ptr) = (void *) 112; - -/* - * bpf_probe_read_kernel - * - * Safely attempt to read *size* bytes from kernel space address - * *unsafe_ptr* and store the data in *dst*. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_probe_read_kernel)(void *dst, __u32 size, const void *unsafe_ptr) = (void *) 113; - -/* - * bpf_probe_read_user_str - * - * Copy a NUL terminated string from an unsafe user address - * *unsafe_ptr* to *dst*. The *size* should include the - * terminating NUL byte. In case the string length is smaller than - * *size*, the target is not padded with further NUL bytes. If the - * string length is larger than *size*, just *size*-1 bytes are - * copied and the last byte is set to NUL. - * - * On success, returns the number of bytes that were written, - * including the terminal NUL. This makes this helper useful in - * tracing programs for reading strings, and more importantly to - * get its length at runtime. See the following snippet: - * - * :: - * - * SEC("kprobe/sys_open") - * void bpf_sys_open(struct pt_regs *ctx) - * { - * char buf[PATHLEN]; // PATHLEN is defined to 256 - * int res = bpf_probe_read_user_str(buf, sizeof(buf), - * ctx->di); - * - * // Consume buf, for example push it to - * // userspace via bpf_perf_event_output(); we - * // can use res (the string length) as event - * // size, after checking its boundaries. - * } - * - * In comparison, using **bpf_probe_read_user**\ () helper here - * instead to read the string would require to estimate the length - * at compile time, and would often result in copying more memory - * than necessary. - * - * Another useful use case is when parsing individual process - * arguments or individual environment variables navigating - * *current*\ **->mm->arg_start** and *current*\ - * **->mm->env_start**: using this helper and the return value, - * one can quickly iterate at the right offset of the memory area. - * - * Returns - * On success, the strictly positive length of the output string, - * including the trailing NUL character. On error, a negative - * value. - */ -static long (*bpf_probe_read_user_str)(void *dst, __u32 size, const void *unsafe_ptr) = (void *) 114; - -/* - * bpf_probe_read_kernel_str - * - * Copy a NUL terminated string from an unsafe kernel address *unsafe_ptr* - * to *dst*. Same semantics as with **bpf_probe_read_user_str**\ () apply. - * - * Returns - * On success, the strictly positive length of the string, including - * the trailing NUL character. On error, a negative value. - */ -static long (*bpf_probe_read_kernel_str)(void *dst, __u32 size, const void *unsafe_ptr) = (void *) 115; - -/* - * bpf_tcp_send_ack - * - * Send out a tcp-ack. *tp* is the in-kernel struct **tcp_sock**. - * *rcv_nxt* is the ack_seq to be sent out. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_tcp_send_ack)(void *tp, __u32 rcv_nxt) = (void *) 116; - -/* - * bpf_send_signal_thread - * - * Send signal *sig* to the thread corresponding to the current task. - * - * Returns - * 0 on success or successfully queued. - * - * **-EBUSY** if work queue under nmi is full. - * - * **-EINVAL** if *sig* is invalid. - * - * **-EPERM** if no permission to send the *sig*. - * - * **-EAGAIN** if bpf program can try again. - */ -static long (*bpf_send_signal_thread)(__u32 sig) = (void *) 117; - -/* - * bpf_jiffies64 - * - * Obtain the 64bit jiffies - * - * Returns - * The 64 bit jiffies - */ -static __u64 (*bpf_jiffies64)(void) = (void *) 118; - -/* - * bpf_read_branch_records - * - * For an eBPF program attached to a perf event, retrieve the - * branch records (**struct perf_branch_entry**) associated to *ctx* - * and store it in the buffer pointed by *buf* up to size - * *size* bytes. - * - * Returns - * On success, number of bytes written to *buf*. On error, a - * negative value. - * - * The *flags* can be set to **BPF_F_GET_BRANCH_RECORDS_SIZE** to - * instead return the number of bytes required to store all the - * branch entries. If this flag is set, *buf* may be NULL. - * - * **-EINVAL** if arguments invalid or **size** not a multiple - * of **sizeof**\ (**struct perf_branch_entry**\ ). - * - * **-ENOENT** if architecture does not support branch records. - */ -static long (*bpf_read_branch_records)(struct bpf_perf_event_data *ctx, void *buf, __u32 size, __u64 flags) = (void *) 119; - -/* - * bpf_get_ns_current_pid_tgid - * - * Returns 0 on success, values for *pid* and *tgid* as seen from the current - * *namespace* will be returned in *nsdata*. - * - * Returns - * 0 on success, or one of the following in case of failure: - * - * **-EINVAL** if dev and inum supplied don't match dev_t and inode number - * with nsfs of current task, or if dev conversion to dev_t lost high bits. - * - * **-ENOENT** if pidns does not exists for the current task. - */ -static long (*bpf_get_ns_current_pid_tgid)(__u64 dev, __u64 ino, struct bpf_pidns_info *nsdata, __u32 size) = (void *) 120; - -/* - * bpf_xdp_output - * - * Write raw *data* blob into a special BPF perf event held by - * *map* of type **BPF_MAP_TYPE_PERF_EVENT_ARRAY**. This perf - * event must have the following attributes: **PERF_SAMPLE_RAW** - * as **sample_type**, **PERF_TYPE_SOFTWARE** as **type**, and - * **PERF_COUNT_SW_BPF_OUTPUT** as **config**. - * - * The *flags* are used to indicate the index in *map* for which - * the value must be put, masked with **BPF_F_INDEX_MASK**. - * Alternatively, *flags* can be set to **BPF_F_CURRENT_CPU** - * to indicate that the index of the current CPU core should be - * used. - * - * The value to write, of *size*, is passed through eBPF stack and - * pointed by *data*. - * - * *ctx* is a pointer to in-kernel struct xdp_buff. - * - * This helper is similar to **bpf_perf_eventoutput**\ () but - * restricted to raw_tracepoint bpf programs. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_xdp_output)(void *ctx, void *map, __u64 flags, void *data, __u64 size) = (void *) 121; - -/* - * bpf_get_netns_cookie - * - * Retrieve the cookie (generated by the kernel) of the network - * namespace the input *ctx* is associated with. The network - * namespace cookie remains stable for its lifetime and provides - * a global identifier that can be assumed unique. If *ctx* is - * NULL, then the helper returns the cookie for the initial - * network namespace. The cookie itself is very similar to that - * of **bpf_get_socket_cookie**\ () helper, but for network - * namespaces instead of sockets. - * - * Returns - * A 8-byte long opaque number. - */ -static __u64 (*bpf_get_netns_cookie)(void *ctx) = (void *) 122; - -/* - * bpf_get_current_ancestor_cgroup_id - * - * Return id of cgroup v2 that is ancestor of the cgroup associated - * with the current task at the *ancestor_level*. The root cgroup - * is at *ancestor_level* zero and each step down the hierarchy - * increments the level. If *ancestor_level* == level of cgroup - * associated with the current task, then return value will be the - * same as that of **bpf_get_current_cgroup_id**\ (). - * - * The helper is useful to implement policies based on cgroups - * that are upper in hierarchy than immediate cgroup associated - * with the current task. - * - * The format of returned id and helper limitations are same as in - * **bpf_get_current_cgroup_id**\ (). - * - * Returns - * The id is returned or 0 in case the id could not be retrieved. - */ -static __u64 (*bpf_get_current_ancestor_cgroup_id)(int ancestor_level) = (void *) 123; - -/* - * bpf_sk_assign - * - * Helper is overloaded depending on BPF program type. This - * description applies to **BPF_PROG_TYPE_SCHED_CLS** and - * **BPF_PROG_TYPE_SCHED_ACT** programs. - * - * Assign the *sk* to the *skb*. When combined with appropriate - * routing configuration to receive the packet towards the socket, - * will cause *skb* to be delivered to the specified socket. - * Subsequent redirection of *skb* via **bpf_redirect**\ (), - * **bpf_clone_redirect**\ () or other methods outside of BPF may - * interfere with successful delivery to the socket. - * - * This operation is only valid from TC ingress path. - * - * The *flags* argument must be zero. - * - * Returns - * 0 on success, or a negative error in case of failure: - * - * **-EINVAL** if specified *flags* are not supported. - * - * **-ENOENT** if the socket is unavailable for assignment. - * - * **-ENETUNREACH** if the socket is unreachable (wrong netns). - * - * **-EOPNOTSUPP** if the operation is not supported, for example - * a call from outside of TC ingress. - * - * **-ESOCKTNOSUPPORT** if the socket type is not supported - * (reuseport). - */ -static long (*bpf_sk_assign)(void *ctx, void *sk, __u64 flags) = (void *) 124; - -/* - * bpf_ktime_get_boot_ns - * - * Return the time elapsed since system boot, in nanoseconds. - * Does include the time the system was suspended. - * See: **clock_gettime**\ (**CLOCK_BOOTTIME**) - * - * Returns - * Current *ktime*. - */ -static __u64 (*bpf_ktime_get_boot_ns)(void) = (void *) 125; - -/* - * bpf_seq_printf - * - * **bpf_seq_printf**\ () uses seq_file **seq_printf**\ () to print - * out the format string. - * The *m* represents the seq_file. The *fmt* and *fmt_size* are for - * the format string itself. The *data* and *data_len* are format string - * arguments. The *data* are a **u64** array and corresponding format string - * values are stored in the array. For strings and pointers where pointees - * are accessed, only the pointer values are stored in the *data* array. - * The *data_len* is the size of *data* in bytes - must be a multiple of 8. - * - * Formats **%s**, **%p{i,I}{4,6}** requires to read kernel memory. - * Reading kernel memory may fail due to either invalid address or - * valid address but requiring a major memory fault. If reading kernel memory - * fails, the string for **%s** will be an empty string, and the ip - * address for **%p{i,I}{4,6}** will be 0. Not returning error to - * bpf program is consistent with what **bpf_trace_printk**\ () does for now. - * - * Returns - * 0 on success, or a negative error in case of failure: - * - * **-EBUSY** if per-CPU memory copy buffer is busy, can try again - * by returning 1 from bpf program. - * - * **-EINVAL** if arguments are invalid, or if *fmt* is invalid/unsupported. - * - * **-E2BIG** if *fmt* contains too many format specifiers. - * - * **-EOVERFLOW** if an overflow happened: The same object will be tried again. - */ -static long (*bpf_seq_printf)(struct seq_file *m, const char *fmt, __u32 fmt_size, const void *data, __u32 data_len) = (void *) 126; - -/* - * bpf_seq_write - * - * **bpf_seq_write**\ () uses seq_file **seq_write**\ () to write the data. - * The *m* represents the seq_file. The *data* and *len* represent the - * data to write in bytes. - * - * Returns - * 0 on success, or a negative error in case of failure: - * - * **-EOVERFLOW** if an overflow happened: The same object will be tried again. - */ -static long (*bpf_seq_write)(struct seq_file *m, const void *data, __u32 len) = (void *) 127; - -/* - * bpf_sk_cgroup_id - * - * Return the cgroup v2 id of the socket *sk*. - * - * *sk* must be a non-**NULL** pointer to a socket, e.g. one - * returned from **bpf_sk_lookup_xxx**\ (), - * **bpf_sk_fullsock**\ (), etc. The format of returned id is - * same as in **bpf_skb_cgroup_id**\ (). - * - * This helper is available only if the kernel was compiled with - * the **CONFIG_SOCK_CGROUP_DATA** configuration option. - * - * Returns - * The id is returned or 0 in case the id could not be retrieved. - */ -static __u64 (*bpf_sk_cgroup_id)(void *sk) = (void *) 128; - -/* - * bpf_sk_ancestor_cgroup_id - * - * Return id of cgroup v2 that is ancestor of cgroup associated - * with the *sk* at the *ancestor_level*. The root cgroup is at - * *ancestor_level* zero and each step down the hierarchy - * increments the level. If *ancestor_level* == level of cgroup - * associated with *sk*, then return value will be same as that - * of **bpf_sk_cgroup_id**\ (). - * - * The helper is useful to implement policies based on cgroups - * that are upper in hierarchy than immediate cgroup associated - * with *sk*. - * - * The format of returned id and helper limitations are same as in - * **bpf_sk_cgroup_id**\ (). - * - * Returns - * The id is returned or 0 in case the id could not be retrieved. - */ -static __u64 (*bpf_sk_ancestor_cgroup_id)(void *sk, int ancestor_level) = (void *) 129; - -/* - * bpf_ringbuf_output - * - * Copy *size* bytes from *data* into a ring buffer *ringbuf*. - * If **BPF_RB_NO_WAKEUP** is specified in *flags*, no notification - * of new data availability is sent. - * If **BPF_RB_FORCE_WAKEUP** is specified in *flags*, notification - * of new data availability is sent unconditionally. - * If **0** is specified in *flags*, an adaptive notification - * of new data availability is sent. - * - * An adaptive notification is a notification sent whenever the user-space - * process has caught up and consumed all available payloads. In case the user-space - * process is still processing a previous payload, then no notification is needed - * as it will process the newly added payload automatically. - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_ringbuf_output)(void *ringbuf, void *data, __u64 size, __u64 flags) = (void *) 130; - -/* - * bpf_ringbuf_reserve - * - * Reserve *size* bytes of payload in a ring buffer *ringbuf*. - * *flags* must be 0. - * - * Returns - * Valid pointer with *size* bytes of memory available; NULL, - * otherwise. - */ -static void *(*bpf_ringbuf_reserve)(void *ringbuf, __u64 size, __u64 flags) = (void *) 131; - -/* - * bpf_ringbuf_submit - * - * Submit reserved ring buffer sample, pointed to by *data*. - * If **BPF_RB_NO_WAKEUP** is specified in *flags*, no notification - * of new data availability is sent. - * If **BPF_RB_FORCE_WAKEUP** is specified in *flags*, notification - * of new data availability is sent unconditionally. - * If **0** is specified in *flags*, an adaptive notification - * of new data availability is sent. - * - * See 'bpf_ringbuf_output()' for the definition of adaptive notification. - * - * Returns - * Nothing. Always succeeds. - */ -static void (*bpf_ringbuf_submit)(void *data, __u64 flags) = (void *) 132; - -/* - * bpf_ringbuf_discard - * - * Discard reserved ring buffer sample, pointed to by *data*. - * If **BPF_RB_NO_WAKEUP** is specified in *flags*, no notification - * of new data availability is sent. - * If **BPF_RB_FORCE_WAKEUP** is specified in *flags*, notification - * of new data availability is sent unconditionally. - * If **0** is specified in *flags*, an adaptive notification - * of new data availability is sent. - * - * See 'bpf_ringbuf_output()' for the definition of adaptive notification. - * - * Returns - * Nothing. Always succeeds. - */ -static void (*bpf_ringbuf_discard)(void *data, __u64 flags) = (void *) 133; - -/* - * bpf_ringbuf_query - * - * Query various characteristics of provided ring buffer. What - * exactly is queries is determined by *flags*: - * - * * **BPF_RB_AVAIL_DATA**: Amount of data not yet consumed. - * * **BPF_RB_RING_SIZE**: The size of ring buffer. - * * **BPF_RB_CONS_POS**: Consumer position (can wrap around). - * * **BPF_RB_PROD_POS**: Producer(s) position (can wrap around). - * - * Data returned is just a momentary snapshot of actual values - * and could be inaccurate, so this facility should be used to - * power heuristics and for reporting, not to make 100% correct - * calculation. - * - * Returns - * Requested value, or 0, if *flags* are not recognized. - */ -static __u64 (*bpf_ringbuf_query)(void *ringbuf, __u64 flags) = (void *) 134; - -/* - * bpf_csum_level - * - * Change the skbs checksum level by one layer up or down, or - * reset it entirely to none in order to have the stack perform - * checksum validation. The level is applicable to the following - * protocols: TCP, UDP, GRE, SCTP, FCOE. For example, a decap of - * | ETH | IP | UDP | GUE | IP | TCP | into | ETH | IP | TCP | - * through **bpf_skb_adjust_room**\ () helper with passing in - * **BPF_F_ADJ_ROOM_NO_CSUM_RESET** flag would require one call - * to **bpf_csum_level**\ () with **BPF_CSUM_LEVEL_DEC** since - * the UDP header is removed. Similarly, an encap of the latter - * into the former could be accompanied by a helper call to - * **bpf_csum_level**\ () with **BPF_CSUM_LEVEL_INC** if the - * skb is still intended to be processed in higher layers of the - * stack instead of just egressing at tc. - * - * There are three supported level settings at this time: - * - * * **BPF_CSUM_LEVEL_INC**: Increases skb->csum_level for skbs - * with CHECKSUM_UNNECESSARY. - * * **BPF_CSUM_LEVEL_DEC**: Decreases skb->csum_level for skbs - * with CHECKSUM_UNNECESSARY. - * * **BPF_CSUM_LEVEL_RESET**: Resets skb->csum_level to 0 and - * sets CHECKSUM_NONE to force checksum validation by the stack. - * * **BPF_CSUM_LEVEL_QUERY**: No-op, returns the current - * skb->csum_level. - * - * Returns - * 0 on success, or a negative error in case of failure. In the - * case of **BPF_CSUM_LEVEL_QUERY**, the current skb->csum_level - * is returned or the error code -EACCES in case the skb is not - * subject to CHECKSUM_UNNECESSARY. - */ -static long (*bpf_csum_level)(struct __sk_buff *skb, __u64 level) = (void *) 135; - -/* - * bpf_skc_to_tcp6_sock - * - * Dynamically cast a *sk* pointer to a *tcp6_sock* pointer. - * - * Returns - * *sk* if casting is valid, or **NULL** otherwise. - */ -static struct tcp6_sock *(*bpf_skc_to_tcp6_sock)(void *sk) = (void *) 136; - -/* - * bpf_skc_to_tcp_sock - * - * Dynamically cast a *sk* pointer to a *tcp_sock* pointer. - * - * Returns - * *sk* if casting is valid, or **NULL** otherwise. - */ -static struct tcp_sock *(*bpf_skc_to_tcp_sock)(void *sk) = (void *) 137; - -/* - * bpf_skc_to_tcp_timewait_sock - * - * Dynamically cast a *sk* pointer to a *tcp_timewait_sock* pointer. - * - * Returns - * *sk* if casting is valid, or **NULL** otherwise. - */ -static struct tcp_timewait_sock *(*bpf_skc_to_tcp_timewait_sock)(void *sk) = (void *) 138; - -/* - * bpf_skc_to_tcp_request_sock - * - * Dynamically cast a *sk* pointer to a *tcp_request_sock* pointer. - * - * Returns - * *sk* if casting is valid, or **NULL** otherwise. - */ -static struct tcp_request_sock *(*bpf_skc_to_tcp_request_sock)(void *sk) = (void *) 139; - -/* - * bpf_skc_to_udp6_sock - * - * Dynamically cast a *sk* pointer to a *udp6_sock* pointer. - * - * Returns - * *sk* if casting is valid, or **NULL** otherwise. - */ -static struct udp6_sock *(*bpf_skc_to_udp6_sock)(void *sk) = (void *) 140; - -/* - * bpf_get_task_stack - * - * Return a user or a kernel stack in bpf program provided buffer. - * To achieve this, the helper needs *task*, which is a valid - * pointer to **struct task_struct**. To store the stacktrace, the - * bpf program provides *buf* with a nonnegative *size*. - * - * The last argument, *flags*, holds the number of stack frames to - * skip (from 0 to 255), masked with - * **BPF_F_SKIP_FIELD_MASK**. The next bits can be used to set - * the following flags: - * - * **BPF_F_USER_STACK** - * Collect a user space stack instead of a kernel stack. - * **BPF_F_USER_BUILD_ID** - * Collect buildid+offset instead of ips for user stack, - * only valid if **BPF_F_USER_STACK** is also specified. - * - * **bpf_get_task_stack**\ () can collect up to - * **PERF_MAX_STACK_DEPTH** both kernel and user frames, subject - * to sufficient large buffer size. Note that - * this limit can be controlled with the **sysctl** program, and - * that it should be manually increased in order to profile long - * user stacks (such as stacks for Java programs). To do so, use: - * - * :: - * - * # sysctl kernel.perf_event_max_stack= - * - * Returns - * A non-negative value equal to or less than *size* on success, - * or a negative error in case of failure. - */ -static long (*bpf_get_task_stack)(struct task_struct *task, void *buf, __u32 size, __u64 flags) = (void *) 141; - -/* - * bpf_load_hdr_opt - * - * Load header option. Support reading a particular TCP header - * option for bpf program (**BPF_PROG_TYPE_SOCK_OPS**). - * - * If *flags* is 0, it will search the option from the - * *skops*\ **->skb_data**. The comment in **struct bpf_sock_ops** - * has details on what skb_data contains under different - * *skops*\ **->op**. - * - * The first byte of the *searchby_res* specifies the - * kind that it wants to search. - * - * If the searching kind is an experimental kind - * (i.e. 253 or 254 according to RFC6994). It also - * needs to specify the "magic" which is either - * 2 bytes or 4 bytes. It then also needs to - * specify the size of the magic by using - * the 2nd byte which is "kind-length" of a TCP - * header option and the "kind-length" also - * includes the first 2 bytes "kind" and "kind-length" - * itself as a normal TCP header option also does. - * - * For example, to search experimental kind 254 with - * 2 byte magic 0xeB9F, the searchby_res should be - * [ 254, 4, 0xeB, 0x9F, 0, 0, .... 0 ]. - * - * To search for the standard window scale option (3), - * the *searchby_res* should be [ 3, 0, 0, .... 0 ]. - * Note, kind-length must be 0 for regular option. - * - * Searching for No-Op (0) and End-of-Option-List (1) are - * not supported. - * - * *len* must be at least 2 bytes which is the minimal size - * of a header option. - * - * Supported flags: - * - * * **BPF_LOAD_HDR_OPT_TCP_SYN** to search from the - * saved_syn packet or the just-received syn packet. - * - * - * Returns - * > 0 when found, the header option is copied to *searchby_res*. - * The return value is the total length copied. On failure, a - * negative error code is returned: - * - * **-EINVAL** if a parameter is invalid. - * - * **-ENOMSG** if the option is not found. - * - * **-ENOENT** if no syn packet is available when - * **BPF_LOAD_HDR_OPT_TCP_SYN** is used. - * - * **-ENOSPC** if there is not enough space. Only *len* number of - * bytes are copied. - * - * **-EFAULT** on failure to parse the header options in the - * packet. - * - * **-EPERM** if the helper cannot be used under the current - * *skops*\ **->op**. - */ -static long (*bpf_load_hdr_opt)(struct bpf_sock_ops *skops, void *searchby_res, __u32 len, __u64 flags) = (void *) 142; - -/* - * bpf_store_hdr_opt - * - * Store header option. The data will be copied - * from buffer *from* with length *len* to the TCP header. - * - * The buffer *from* should have the whole option that - * includes the kind, kind-length, and the actual - * option data. The *len* must be at least kind-length - * long. The kind-length does not have to be 4 byte - * aligned. The kernel will take care of the padding - * and setting the 4 bytes aligned value to th->doff. - * - * This helper will check for duplicated option - * by searching the same option in the outgoing skb. - * - * This helper can only be called during - * **BPF_SOCK_OPS_WRITE_HDR_OPT_CB**. - * - * - * Returns - * 0 on success, or negative error in case of failure: - * - * **-EINVAL** If param is invalid. - * - * **-ENOSPC** if there is not enough space in the header. - * Nothing has been written - * - * **-EEXIST** if the option already exists. - * - * **-EFAULT** on failrue to parse the existing header options. - * - * **-EPERM** if the helper cannot be used under the current - * *skops*\ **->op**. - */ -static long (*bpf_store_hdr_opt)(struct bpf_sock_ops *skops, const void *from, __u32 len, __u64 flags) = (void *) 143; - -/* - * bpf_reserve_hdr_opt - * - * Reserve *len* bytes for the bpf header option. The - * space will be used by **bpf_store_hdr_opt**\ () later in - * **BPF_SOCK_OPS_WRITE_HDR_OPT_CB**. - * - * If **bpf_reserve_hdr_opt**\ () is called multiple times, - * the total number of bytes will be reserved. - * - * This helper can only be called during - * **BPF_SOCK_OPS_HDR_OPT_LEN_CB**. - * - * - * Returns - * 0 on success, or negative error in case of failure: - * - * **-EINVAL** if a parameter is invalid. - * - * **-ENOSPC** if there is not enough space in the header. - * - * **-EPERM** if the helper cannot be used under the current - * *skops*\ **->op**. - */ -static long (*bpf_reserve_hdr_opt)(struct bpf_sock_ops *skops, __u32 len, __u64 flags) = (void *) 144; - -/* - * bpf_inode_storage_get - * - * Get a bpf_local_storage from an *inode*. - * - * Logically, it could be thought of as getting the value from - * a *map* with *inode* as the **key**. From this - * perspective, the usage is not much different from - * **bpf_map_lookup_elem**\ (*map*, **&**\ *inode*) except this - * helper enforces the key must be an inode and the map must also - * be a **BPF_MAP_TYPE_INODE_STORAGE**. - * - * Underneath, the value is stored locally at *inode* instead of - * the *map*. The *map* is used as the bpf-local-storage - * "type". The bpf-local-storage "type" (i.e. the *map*) is - * searched against all bpf_local_storage residing at *inode*. - * - * An optional *flags* (**BPF_LOCAL_STORAGE_GET_F_CREATE**) can be - * used such that a new bpf_local_storage will be - * created if one does not exist. *value* can be used - * together with **BPF_LOCAL_STORAGE_GET_F_CREATE** to specify - * the initial value of a bpf_local_storage. If *value* is - * **NULL**, the new bpf_local_storage will be zero initialized. - * - * Returns - * A bpf_local_storage pointer is returned on success. - * - * **NULL** if not found or there was an error in adding - * a new bpf_local_storage. - */ -static void *(*bpf_inode_storage_get)(void *map, void *inode, void *value, __u64 flags) = (void *) 145; - -/* - * bpf_inode_storage_delete - * - * Delete a bpf_local_storage from an *inode*. - * - * Returns - * 0 on success. - * - * **-ENOENT** if the bpf_local_storage cannot be found. - */ -static int (*bpf_inode_storage_delete)(void *map, void *inode) = (void *) 146; - -/* - * bpf_d_path - * - * Return full path for given **struct path** object, which - * needs to be the kernel BTF *path* object. The path is - * returned in the provided buffer *buf* of size *sz* and - * is zero terminated. - * - * - * Returns - * On success, the strictly positive length of the string, - * including the trailing NUL character. On error, a negative - * value. - */ -static long (*bpf_d_path)(struct path *path, char *buf, __u32 sz) = (void *) 147; - -/* - * bpf_copy_from_user - * - * Read *size* bytes from user space address *user_ptr* and store - * the data in *dst*. This is a wrapper of **copy_from_user**\ (). - * - * Returns - * 0 on success, or a negative error in case of failure. - */ -static long (*bpf_copy_from_user)(void *dst, __u32 size, const void *user_ptr) = (void *) 148; - -/* - * bpf_snprintf_btf - * - * Use BTF to store a string representation of *ptr*->ptr in *str*, - * using *ptr*->type_id. This value should specify the type - * that *ptr*->ptr points to. LLVM __builtin_btf_type_id(type, 1) - * can be used to look up vmlinux BTF type ids. Traversing the - * data structure using BTF, the type information and values are - * stored in the first *str_size* - 1 bytes of *str*. Safe copy of - * the pointer data is carried out to avoid kernel crashes during - * operation. Smaller types can use string space on the stack; - * larger programs can use map data to store the string - * representation. - * - * The string can be subsequently shared with userspace via - * bpf_perf_event_output() or ring buffer interfaces. - * bpf_trace_printk() is to be avoided as it places too small - * a limit on string size to be useful. - * - * *flags* is a combination of - * - * **BTF_F_COMPACT** - * no formatting around type information - * **BTF_F_NONAME** - * no struct/union member names/types - * **BTF_F_PTR_RAW** - * show raw (unobfuscated) pointer values; - * equivalent to printk specifier %px. - * **BTF_F_ZERO** - * show zero-valued struct/union members; they - * are not displayed by default - * - * - * Returns - * The number of bytes that were written (or would have been - * written if output had to be truncated due to string size), - * or a negative error in cases of failure. - */ -static long (*bpf_snprintf_btf)(char *str, __u32 str_size, struct btf_ptr *ptr, __u32 btf_ptr_size, __u64 flags) = (void *) 149; - -/* - * bpf_seq_printf_btf - * - * Use BTF to write to seq_write a string representation of - * *ptr*->ptr, using *ptr*->type_id as per bpf_snprintf_btf(). - * *flags* are identical to those used for bpf_snprintf_btf. - * - * Returns - * 0 on success or a negative error in case of failure. - */ -static long (*bpf_seq_printf_btf)(struct seq_file *m, struct btf_ptr *ptr, __u32 ptr_size, __u64 flags) = (void *) 150; - -/* - * bpf_skb_cgroup_classid - * - * See **bpf_get_cgroup_classid**\ () for the main description. - * This helper differs from **bpf_get_cgroup_classid**\ () in that - * the cgroup v1 net_cls class is retrieved only from the *skb*'s - * associated socket instead of the current process. - * - * Returns - * The id is returned or 0 in case the id could not be retrieved. - */ -static __u64 (*bpf_skb_cgroup_classid)(struct __sk_buff *skb) = (void *) 151; - -/* - * bpf_redirect_neigh - * - * Redirect the packet to another net device of index *ifindex* - * and fill in L2 addresses from neighboring subsystem. This helper - * is somewhat similar to **bpf_redirect**\ (), except that it - * populates L2 addresses as well, meaning, internally, the helper - * relies on the neighbor lookup for the L2 address of the nexthop. - * - * The helper will perform a FIB lookup based on the skb's - * networking header to get the address of the next hop, unless - * this is supplied by the caller in the *params* argument. The - * *plen* argument indicates the len of *params* and should be set - * to 0 if *params* is NULL. - * - * The *flags* argument is reserved and must be 0. The helper is - * currently only supported for tc BPF program types, and enabled - * for IPv4 and IPv6 protocols. - * - * Returns - * The helper returns **TC_ACT_REDIRECT** on success or - * **TC_ACT_SHOT** on error. - */ -static long (*bpf_redirect_neigh)(__u32 ifindex, struct bpf_redir_neigh *params, int plen, __u64 flags) = (void *) 152; - -/* - * bpf_per_cpu_ptr - * - * Take a pointer to a percpu ksym, *percpu_ptr*, and return a - * pointer to the percpu kernel variable on *cpu*. A ksym is an - * extern variable decorated with '__ksym'. For ksym, there is a - * global var (either static or global) defined of the same name - * in the kernel. The ksym is percpu if the global var is percpu. - * The returned pointer points to the global percpu var on *cpu*. - * - * bpf_per_cpu_ptr() has the same semantic as per_cpu_ptr() in the - * kernel, except that bpf_per_cpu_ptr() may return NULL. This - * happens if *cpu* is larger than nr_cpu_ids. The caller of - * bpf_per_cpu_ptr() must check the returned value. - * - * Returns - * A pointer pointing to the kernel percpu variable on *cpu*, or - * NULL, if *cpu* is invalid. - */ -static void *(*bpf_per_cpu_ptr)(const void *percpu_ptr, __u32 cpu) = (void *) 153; - -/* - * bpf_this_cpu_ptr - * - * Take a pointer to a percpu ksym, *percpu_ptr*, and return a - * pointer to the percpu kernel variable on this cpu. See the - * description of 'ksym' in **bpf_per_cpu_ptr**\ (). - * - * bpf_this_cpu_ptr() has the same semantic as this_cpu_ptr() in - * the kernel. Different from **bpf_per_cpu_ptr**\ (), it would - * never return NULL. - * - * Returns - * A pointer pointing to the kernel percpu variable on this cpu. - */ -static void *(*bpf_this_cpu_ptr)(const void *percpu_ptr) = (void *) 154; - -/* - * bpf_redirect_peer - * - * Redirect the packet to another net device of index *ifindex*. - * This helper is somewhat similar to **bpf_redirect**\ (), except - * that the redirection happens to the *ifindex*' peer device and - * the netns switch takes place from ingress to ingress without - * going through the CPU's backlog queue. - * - * The *flags* argument is reserved and must be 0. The helper is - * currently only supported for tc BPF program types at the ingress - * hook and for veth device types. The peer device must reside in a - * different network namespace. - * - * Returns - * The helper returns **TC_ACT_REDIRECT** on success or - * **TC_ACT_SHOT** on error. - */ -static long (*bpf_redirect_peer)(__u32 ifindex, __u64 flags) = (void *) 155; - -/* - * bpf_task_storage_get - * - * Get a bpf_local_storage from the *task*. - * - * Logically, it could be thought of as getting the value from - * a *map* with *task* as the **key**. From this - * perspective, the usage is not much different from - * **bpf_map_lookup_elem**\ (*map*, **&**\ *task*) except this - * helper enforces the key must be an task_struct and the map must also - * be a **BPF_MAP_TYPE_TASK_STORAGE**. - * - * Underneath, the value is stored locally at *task* instead of - * the *map*. The *map* is used as the bpf-local-storage - * "type". The bpf-local-storage "type" (i.e. the *map*) is - * searched against all bpf_local_storage residing at *task*. - * - * An optional *flags* (**BPF_LOCAL_STORAGE_GET_F_CREATE**) can be - * used such that a new bpf_local_storage will be - * created if one does not exist. *value* can be used - * together with **BPF_LOCAL_STORAGE_GET_F_CREATE** to specify - * the initial value of a bpf_local_storage. If *value* is - * **NULL**, the new bpf_local_storage will be zero initialized. - * - * Returns - * A bpf_local_storage pointer is returned on success. - * - * **NULL** if not found or there was an error in adding - * a new bpf_local_storage. - */ -static void *(*bpf_task_storage_get)(void *map, struct task_struct *task, void *value, __u64 flags) = (void *) 156; - -/* - * bpf_task_storage_delete - * - * Delete a bpf_local_storage from a *task*. - * - * Returns - * 0 on success. - * - * **-ENOENT** if the bpf_local_storage cannot be found. - */ -static long (*bpf_task_storage_delete)(void *map, struct task_struct *task) = (void *) 157; - -/* - * bpf_get_current_task_btf - * - * Return a BTF pointer to the "current" task. - * This pointer can also be used in helpers that accept an - * *ARG_PTR_TO_BTF_ID* of type *task_struct*. - * - * Returns - * Pointer to the current task. - */ -static struct task_struct *(*bpf_get_current_task_btf)(void) = (void *) 158; - -/* - * bpf_bprm_opts_set - * - * Set or clear certain options on *bprm*: - * - * **BPF_F_BPRM_SECUREEXEC** Set the secureexec bit - * which sets the **AT_SECURE** auxv for glibc. The bit - * is cleared if the flag is not specified. - * - * Returns - * **-EINVAL** if invalid *flags* are passed, zero otherwise. - */ -static long (*bpf_bprm_opts_set)(struct linux_binprm *bprm, __u64 flags) = (void *) 159; - -/* - * bpf_ktime_get_coarse_ns - * - * Return a coarse-grained version of the time elapsed since - * system boot, in nanoseconds. Does not include time the system - * was suspended. - * - * See: **clock_gettime**\ (**CLOCK_MONOTONIC_COARSE**) - * - * Returns - * Current *ktime*. - */ -static __u64 (*bpf_ktime_get_coarse_ns)(void) = (void *) 160; - -/* - * bpf_ima_inode_hash - * - * Returns the stored IMA hash of the *inode* (if it's avaialable). - * If the hash is larger than *size*, then only *size* - * bytes will be copied to *dst* - * - * Returns - * The **hash_algo** is returned on success, - * **-EOPNOTSUP** if IMA is disabled or **-EINVAL** if - * invalid arguments are passed. - */ -static long (*bpf_ima_inode_hash)(struct inode *inode, void *dst, __u32 size) = (void *) 161; - -/* - * bpf_sock_from_file - * - * If the given file represents a socket, returns the associated - * socket. - * - * Returns - * A pointer to a struct socket on success or NULL if the file is - * not a socket. - */ -static struct socket *(*bpf_sock_from_file)(struct file *file) = (void *) 162; - -/* - * bpf_check_mtu - * - * Check packet size against exceeding MTU of net device (based - * on *ifindex*). This helper will likely be used in combination - * with helpers that adjust/change the packet size. - * - * The argument *len_diff* can be used for querying with a planned - * size change. This allows to check MTU prior to changing packet - * ctx. Providing an *len_diff* adjustment that is larger than the - * actual packet size (resulting in negative packet size) will in - * principle not exceed the MTU, why it is not considered a - * failure. Other BPF-helpers are needed for performing the - * planned size change, why the responsability for catch a negative - * packet size belong in those helpers. - * - * Specifying *ifindex* zero means the MTU check is performed - * against the current net device. This is practical if this isn't - * used prior to redirect. - * - * On input *mtu_len* must be a valid pointer, else verifier will - * reject BPF program. If the value *mtu_len* is initialized to - * zero then the ctx packet size is use. When value *mtu_len* is - * provided as input this specify the L3 length that the MTU check - * is done against. Remember XDP and TC length operate at L2, but - * this value is L3 as this correlate to MTU and IP-header tot_len - * values which are L3 (similar behavior as bpf_fib_lookup). - * - * The Linux kernel route table can configure MTUs on a more - * specific per route level, which is not provided by this helper. - * For route level MTU checks use the **bpf_fib_lookup**\ () - * helper. - * - * *ctx* is either **struct xdp_md** for XDP programs or - * **struct sk_buff** for tc cls_act programs. - * - * The *flags* argument can be a combination of one or more of the - * following values: - * - * **BPF_MTU_CHK_SEGS** - * This flag will only works for *ctx* **struct sk_buff**. - * If packet context contains extra packet segment buffers - * (often knows as GSO skb), then MTU check is harder to - * check at this point, because in transmit path it is - * possible for the skb packet to get re-segmented - * (depending on net device features). This could still be - * a MTU violation, so this flag enables performing MTU - * check against segments, with a different violation - * return code to tell it apart. Check cannot use len_diff. - * - * On return *mtu_len* pointer contains the MTU value of the net - * device. Remember the net device configured MTU is the L3 size, - * which is returned here and XDP and TC length operate at L2. - * Helper take this into account for you, but remember when using - * MTU value in your BPF-code. - * - * - * Returns - * * 0 on success, and populate MTU value in *mtu_len* pointer. - * - * * < 0 if any input argument is invalid (*mtu_len* not updated) - * - * MTU violations return positive values, but also populate MTU - * value in *mtu_len* pointer, as this can be needed for - * implementing PMTU handing: - * - * * **BPF_MTU_CHK_RET_FRAG_NEEDED** - * * **BPF_MTU_CHK_RET_SEGS_TOOBIG** - */ -static long (*bpf_check_mtu)(void *ctx, __u32 ifindex, __u32 *mtu_len, __s32 len_diff, __u64 flags) = (void *) 163; - -/* - * bpf_for_each_map_elem - * - * For each element in **map**, call **callback_fn** function with - * **map**, **callback_ctx** and other map-specific parameters. - * The **callback_fn** should be a static function and - * the **callback_ctx** should be a pointer to the stack. - * The **flags** is used to control certain aspects of the helper. - * Currently, the **flags** must be 0. - * - * The following are a list of supported map types and their - * respective expected callback signatures: - * - * BPF_MAP_TYPE_HASH, BPF_MAP_TYPE_PERCPU_HASH, - * BPF_MAP_TYPE_LRU_HASH, BPF_MAP_TYPE_LRU_PERCPU_HASH, - * BPF_MAP_TYPE_ARRAY, BPF_MAP_TYPE_PERCPU_ARRAY - * - * long (\*callback_fn)(struct bpf_map \*map, const void \*key, void \*value, void \*ctx); - * - * For per_cpu maps, the map_value is the value on the cpu where the - * bpf_prog is running. - * - * If **callback_fn** return 0, the helper will continue to the next - * element. If return value is 1, the helper will skip the rest of - * elements and return. Other return values are not used now. - * - * - * Returns - * The number of traversed map elements for success, **-EINVAL** for - * invalid **flags**. - */ -static long (*bpf_for_each_map_elem)(void *map, void *callback_fn, void *callback_ctx, __u64 flags) = (void *) 164; - -/* - * bpf_snprintf - * - * Outputs a string into the **str** buffer of size **str_size** - * based on a format string stored in a read-only map pointed by - * **fmt**. - * - * Each format specifier in **fmt** corresponds to one u64 element - * in the **data** array. For strings and pointers where pointees - * are accessed, only the pointer values are stored in the *data* - * array. The *data_len* is the size of *data* in bytes - must be - * a multiple of 8. - * - * Formats **%s** and **%p{i,I}{4,6}** require to read kernel - * memory. Reading kernel memory may fail due to either invalid - * address or valid address but requiring a major memory fault. If - * reading kernel memory fails, the string for **%s** will be an - * empty string, and the ip address for **%p{i,I}{4,6}** will be 0. - * Not returning error to bpf program is consistent with what - * **bpf_trace_printk**\ () does for now. - * - * - * Returns - * The strictly positive length of the formatted string, including - * the trailing zero character. If the return value is greater than - * **str_size**, **str** contains a truncated string, guaranteed to - * be zero-terminated except when **str_size** is 0. - * - * Or **-EBUSY** if the per-CPU memory copy buffer is busy. - */ -static long (*bpf_snprintf)(char *str, __u32 str_size, const char *fmt, __u64 *data, __u32 data_len) = (void *) 165; - -/* - * bpf_sys_bpf - * - * Execute bpf syscall with given arguments. - * - * Returns - * A syscall result. - */ -static long (*bpf_sys_bpf)(__u32 cmd, void *attr, __u32 attr_size) = (void *) 166; - -/* - * bpf_btf_find_by_name_kind - * - * Find BTF type with given name and kind in vmlinux BTF or in module's BTFs. - * - * Returns - * Returns btf_id and btf_obj_fd in lower and upper 32 bits. - */ -static long (*bpf_btf_find_by_name_kind)(char *name, int name_sz, __u32 kind, int flags) = (void *) 167; - -/* - * bpf_sys_close - * - * Execute close syscall for given FD. - * - * Returns - * A syscall result. - */ -static long (*bpf_sys_close)(__u32 fd) = (void *) 168; - -/* - * bpf_timer_init - * - * Initialize the timer. - * First 4 bits of *flags* specify clockid. - * Only CLOCK_MONOTONIC, CLOCK_REALTIME, CLOCK_BOOTTIME are allowed. - * All other bits of *flags* are reserved. - * The verifier will reject the program if *timer* is not from - * the same *map*. - * - * Returns - * 0 on success. - * **-EBUSY** if *timer* is already initialized. - * **-EINVAL** if invalid *flags* are passed. - * **-EPERM** if *timer* is in a map that doesn't have any user references. - * The user space should either hold a file descriptor to a map with timers - * or pin such map in bpffs. When map is unpinned or file descriptor is - * closed all timers in the map will be cancelled and freed. - */ -static long (*bpf_timer_init)(struct bpf_timer *timer, void *map, __u64 flags) = (void *) 169; - -/* - * bpf_timer_set_callback - * - * Configure the timer to call *callback_fn* static function. - * - * Returns - * 0 on success. - * **-EINVAL** if *timer* was not initialized with bpf_timer_init() earlier. - * **-EPERM** if *timer* is in a map that doesn't have any user references. - * The user space should either hold a file descriptor to a map with timers - * or pin such map in bpffs. When map is unpinned or file descriptor is - * closed all timers in the map will be cancelled and freed. - */ -static long (*bpf_timer_set_callback)(struct bpf_timer *timer, void *callback_fn) = (void *) 170; - -/* - * bpf_timer_start - * - * Set timer expiration N nanoseconds from the current time. The - * configured callback will be invoked in soft irq context on some cpu - * and will not repeat unless another bpf_timer_start() is made. - * In such case the next invocation can migrate to a different cpu. - * Since struct bpf_timer is a field inside map element the map - * owns the timer. The bpf_timer_set_callback() will increment refcnt - * of BPF program to make sure that callback_fn code stays valid. - * When user space reference to a map reaches zero all timers - * in a map are cancelled and corresponding program's refcnts are - * decremented. This is done to make sure that Ctrl-C of a user - * process doesn't leave any timers running. If map is pinned in - * bpffs the callback_fn can re-arm itself indefinitely. - * bpf_map_update/delete_elem() helpers and user space sys_bpf commands - * cancel and free the timer in the given map element. - * The map can contain timers that invoke callback_fn-s from different - * programs. The same callback_fn can serve different timers from - * different maps if key/value layout matches across maps. - * Every bpf_timer_set_callback() can have different callback_fn. - * - * - * Returns - * 0 on success. - * **-EINVAL** if *timer* was not initialized with bpf_timer_init() earlier - * or invalid *flags* are passed. - */ -static long (*bpf_timer_start)(struct bpf_timer *timer, __u64 nsecs, __u64 flags) = (void *) 171; - -/* - * bpf_timer_cancel - * - * Cancel the timer and wait for callback_fn to finish if it was running. - * - * Returns - * 0 if the timer was not active. - * 1 if the timer was active. - * **-EINVAL** if *timer* was not initialized with bpf_timer_init() earlier. - * **-EDEADLK** if callback_fn tried to call bpf_timer_cancel() on its - * own timer which would have led to a deadlock otherwise. - */ -static long (*bpf_timer_cancel)(struct bpf_timer *timer) = (void *) 172; - -/* - * bpf_get_func_ip - * - * Get address of the traced function (for tracing and kprobe programs). - * - * Returns - * Address of the traced function. - */ -static __u64 (*bpf_get_func_ip)(void *ctx) = (void *) 173; - -/* - * bpf_get_attach_cookie - * - * Get bpf_cookie value provided (optionally) during the program - * attachment. It might be different for each individual - * attachment, even if BPF program itself is the same. - * Expects BPF program context *ctx* as a first argument. - * - * Supported for the following program types: - * - kprobe/uprobe; - * - tracepoint; - * - perf_event. - * - * Returns - * Value specified by user at BPF link creation/attachment time - * or 0, if it was not specified. - */ -static __u64 (*bpf_get_attach_cookie)(void *ctx) = (void *) 174; - -/* - * bpf_task_pt_regs - * - * Get the struct pt_regs associated with **task**. - * - * Returns - * A pointer to struct pt_regs. - */ -static long (*bpf_task_pt_regs)(struct task_struct *task) = (void *) 175; - -/* - * bpf_get_branch_snapshot - * - * Get branch trace from hardware engines like Intel LBR. The - * hardware engine is stopped shortly after the helper is - * called. Therefore, the user need to filter branch entries - * based on the actual use case. To capture branch trace - * before the trigger point of the BPF program, the helper - * should be called at the beginning of the BPF program. - * - * The data is stored as struct perf_branch_entry into output - * buffer *entries*. *size* is the size of *entries* in bytes. - * *flags* is reserved for now and must be zero. - * - * - * Returns - * On success, number of bytes written to *buf*. On error, a - * negative value. - * - * **-EINVAL** if *flags* is not zero. - * - * **-ENOENT** if architecture does not support branch records. - */ -static long (*bpf_get_branch_snapshot)(void *entries, __u32 size, __u64 flags) = (void *) 176; - -/* - * bpf_trace_vprintk - * - * Behaves like **bpf_trace_printk**\ () helper, but takes an array of u64 - * to format and can handle more format args as a result. - * - * Arguments are to be used as in **bpf_seq_printf**\ () helper. - * - * Returns - * The number of bytes written to the buffer, or a negative error - * in case of failure. - */ -static long (*bpf_trace_vprintk)(const char *fmt, __u32 fmt_size, const void *data, __u32 data_len) = (void *) 177; - -/* - * bpf_skc_to_unix_sock - * - * Dynamically cast a *sk* pointer to a *unix_sock* pointer. - * - * Returns - * *sk* if casting is valid, or **NULL** otherwise. - */ -static struct unix_sock *(*bpf_skc_to_unix_sock)(void *sk) = (void *) 178; - -/* - * bpf_kallsyms_lookup_name - * - * Get the address of a kernel symbol, returned in *res*. *res* is - * set to 0 if the symbol is not found. - * - * Returns - * On success, zero. On error, a negative value. - * - * **-EINVAL** if *flags* is not zero. - * - * **-EINVAL** if string *name* is not the same size as *name_sz*. - * - * **-ENOENT** if symbol is not found. - * - * **-EPERM** if caller does not have permission to obtain kernel address. - */ -static long (*bpf_kallsyms_lookup_name)(const char *name, int name_sz, int flags, __u64 *res) = (void *) 179; - -/* - * bpf_find_vma - * - * Find vma of *task* that contains *addr*, call *callback_fn* - * function with *task*, *vma*, and *callback_ctx*. - * The *callback_fn* should be a static function and - * the *callback_ctx* should be a pointer to the stack. - * The *flags* is used to control certain aspects of the helper. - * Currently, the *flags* must be 0. - * - * The expected callback signature is - * - * long (\*callback_fn)(struct task_struct \*task, struct vm_area_struct \*vma, void \*callback_ctx); - * - * - * Returns - * 0 on success. - * **-ENOENT** if *task->mm* is NULL, or no vma contains *addr*. - * **-EBUSY** if failed to try lock mmap_lock. - * **-EINVAL** for invalid **flags**. - */ -static long (*bpf_find_vma)(struct task_struct *task, __u64 addr, void *callback_fn, void *callback_ctx, __u64 flags) = (void *) 180; - - diff --git a/component/ebpf/bpf/bpf_helpers.h b/component/ebpf/bpf/bpf_helpers.h deleted file mode 100644 index 963b1060..00000000 --- a/component/ebpf/bpf/bpf_helpers.h +++ /dev/null @@ -1,262 +0,0 @@ -/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */ -#ifndef __BPF_HELPERS__ -#define __BPF_HELPERS__ - -/* - * Note that bpf programs need to include either - * vmlinux.h (auto-generated from BTF) or linux/types.h - * in advance since bpf_helper_defs.h uses such types - * as __u64. - */ -#include "bpf_helper_defs.h" - -#define __uint(name, val) int (*name)[val] -#define __type(name, val) typeof(val) *name -#define __array(name, val) typeof(val) *name[] - -/* - * Helper macro to place programs, maps, license in - * different sections in elf_bpf file. Section names - * are interpreted by libbpf depending on the context (BPF programs, BPF maps, - * extern variables, etc). - * To allow use of SEC() with externs (e.g., for extern .maps declarations), - * make sure __attribute__((unused)) doesn't trigger compilation warning. - */ -#define SEC(name) \ - _Pragma("GCC diagnostic push") \ - _Pragma("GCC diagnostic ignored \"-Wignored-attributes\"") \ - __attribute__((section(name), used)) \ - _Pragma("GCC diagnostic pop") \ - -/* Avoid 'linux/stddef.h' definition of '__always_inline'. */ -#undef __always_inline -#define __always_inline inline __attribute__((always_inline)) - -#ifndef __noinline -#define __noinline __attribute__((noinline)) -#endif -#ifndef __weak -#define __weak __attribute__((weak)) -#endif - -/* - * Use __hidden attribute to mark a non-static BPF subprogram effectively - * static for BPF verifier's verification algorithm purposes, allowing more - * extensive and permissive BPF verification process, taking into account - * subprogram's caller context. - */ -#define __hidden __attribute__((visibility("hidden"))) - -/* When utilizing vmlinux.h with BPF CO-RE, user BPF programs can't include - * any system-level headers (such as stddef.h, linux/version.h, etc), and - * commonly-used macros like NULL and KERNEL_VERSION aren't available through - * vmlinux.h. This just adds unnecessary hurdles and forces users to re-define - * them on their own. So as a convenience, provide such definitions here. - */ -#ifndef NULL -#define NULL ((void *)0) -#endif - -#ifndef KERNEL_VERSION -#define KERNEL_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + ((c) > 255 ? 255 : (c))) -#endif - -/* - * Helper macros to manipulate data structures - */ -#ifndef offsetof -#define offsetof(TYPE, MEMBER) ((unsigned long)&((TYPE *)0)->MEMBER) -#endif -#ifndef container_of -#define container_of(ptr, type, member) \ - ({ \ - void *__mptr = (void *)(ptr); \ - ((type *)(__mptr - offsetof(type, member))); \ - }) -#endif - -/* - * Helper macro to throw a compilation error if __bpf_unreachable() gets - * built into the resulting code. This works given BPF back end does not - * implement __builtin_trap(). This is useful to assert that certain paths - * of the program code are never used and hence eliminated by the compiler. - * - * For example, consider a switch statement that covers known cases used by - * the program. __bpf_unreachable() can then reside in the default case. If - * the program gets extended such that a case is not covered in the switch - * statement, then it will throw a build error due to the default case not - * being compiled out. - */ -#ifndef __bpf_unreachable -# define __bpf_unreachable() __builtin_trap() -#endif - -/* - * Helper function to perform a tail call with a constant/immediate map slot. - */ -#if __clang_major__ >= 8 && defined(__bpf__) -static __always_inline void -bpf_tail_call_static(void *ctx, const void *map, const __u32 slot) -{ - if (!__builtin_constant_p(slot)) - __bpf_unreachable(); - - /* - * Provide a hard guarantee that LLVM won't optimize setting r2 (map - * pointer) and r3 (constant map index) from _different paths_ ending - * up at the _same_ call insn as otherwise we won't be able to use the - * jmpq/nopl retpoline-free patching by the x86-64 JIT in the kernel - * given they mismatch. See also d2e4c1e6c294 ("bpf: Constant map key - * tracking for prog array pokes") for details on verifier tracking. - * - * Note on clobber list: we need to stay in-line with BPF calling - * convention, so even if we don't end up using r0, r4, r5, we need - * to mark them as clobber so that LLVM doesn't end up using them - * before / after the call. - */ - asm volatile("r1 = %[ctx]\n\t" - "r2 = %[map]\n\t" - "r3 = %[slot]\n\t" - "call 12" - :: [ctx]"r"(ctx), [map]"r"(map), [slot]"i"(slot) - : "r0", "r1", "r2", "r3", "r4", "r5"); -} -#endif - -/* - * Helper structure used by eBPF C program - * to describe BPF map attributes to libbpf loader - */ -struct bpf_map_def { - unsigned int type; - unsigned int key_size; - unsigned int value_size; - unsigned int max_entries; - unsigned int map_flags; -}; - -enum libbpf_pin_type { - LIBBPF_PIN_NONE, - /* PIN_BY_NAME: pin maps by name (in /sys/fs/bpf by default) */ - LIBBPF_PIN_BY_NAME, -}; - -enum libbpf_tristate { - TRI_NO = 0, - TRI_YES = 1, - TRI_MODULE = 2, -}; - -#define __kconfig __attribute__((section(".kconfig"))) -#define __ksym __attribute__((section(".ksyms"))) - -#ifndef ___bpf_concat -#define ___bpf_concat(a, b) a ## b -#endif -#ifndef ___bpf_apply -#define ___bpf_apply(fn, n) ___bpf_concat(fn, n) -#endif -#ifndef ___bpf_nth -#define ___bpf_nth(_, _1, _2, _3, _4, _5, _6, _7, _8, _9, _a, _b, _c, N, ...) N -#endif -#ifndef ___bpf_narg -#define ___bpf_narg(...) \ - ___bpf_nth(_, ##__VA_ARGS__, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0) -#endif - -#define ___bpf_fill0(arr, p, x) do {} while (0) -#define ___bpf_fill1(arr, p, x) arr[p] = x -#define ___bpf_fill2(arr, p, x, args...) arr[p] = x; ___bpf_fill1(arr, p + 1, args) -#define ___bpf_fill3(arr, p, x, args...) arr[p] = x; ___bpf_fill2(arr, p + 1, args) -#define ___bpf_fill4(arr, p, x, args...) arr[p] = x; ___bpf_fill3(arr, p + 1, args) -#define ___bpf_fill5(arr, p, x, args...) arr[p] = x; ___bpf_fill4(arr, p + 1, args) -#define ___bpf_fill6(arr, p, x, args...) arr[p] = x; ___bpf_fill5(arr, p + 1, args) -#define ___bpf_fill7(arr, p, x, args...) arr[p] = x; ___bpf_fill6(arr, p + 1, args) -#define ___bpf_fill8(arr, p, x, args...) arr[p] = x; ___bpf_fill7(arr, p + 1, args) -#define ___bpf_fill9(arr, p, x, args...) arr[p] = x; ___bpf_fill8(arr, p + 1, args) -#define ___bpf_fill10(arr, p, x, args...) arr[p] = x; ___bpf_fill9(arr, p + 1, args) -#define ___bpf_fill11(arr, p, x, args...) arr[p] = x; ___bpf_fill10(arr, p + 1, args) -#define ___bpf_fill12(arr, p, x, args...) arr[p] = x; ___bpf_fill11(arr, p + 1, args) -#define ___bpf_fill(arr, args...) \ - ___bpf_apply(___bpf_fill, ___bpf_narg(args))(arr, 0, args) - -/* - * BPF_SEQ_PRINTF to wrap bpf_seq_printf to-be-printed values - * in a structure. - */ -#define BPF_SEQ_PRINTF(seq, fmt, args...) \ -({ \ - static const char ___fmt[] = fmt; \ - unsigned long long ___param[___bpf_narg(args)]; \ - \ - _Pragma("GCC diagnostic push") \ - _Pragma("GCC diagnostic ignored \"-Wint-conversion\"") \ - ___bpf_fill(___param, args); \ - _Pragma("GCC diagnostic pop") \ - \ - bpf_seq_printf(seq, ___fmt, sizeof(___fmt), \ - ___param, sizeof(___param)); \ -}) - -/* - * BPF_SNPRINTF wraps the bpf_snprintf helper with variadic arguments instead of - * an array of u64. - */ -#define BPF_SNPRINTF(out, out_size, fmt, args...) \ -({ \ - static const char ___fmt[] = fmt; \ - unsigned long long ___param[___bpf_narg(args)]; \ - \ - _Pragma("GCC diagnostic push") \ - _Pragma("GCC diagnostic ignored \"-Wint-conversion\"") \ - ___bpf_fill(___param, args); \ - _Pragma("GCC diagnostic pop") \ - \ - bpf_snprintf(out, out_size, ___fmt, \ - ___param, sizeof(___param)); \ -}) - -#ifdef BPF_NO_GLOBAL_DATA -#define BPF_PRINTK_FMT_MOD -#else -#define BPF_PRINTK_FMT_MOD static const -#endif - -#define __bpf_printk(fmt, ...) \ -({ \ - BPF_PRINTK_FMT_MOD char ____fmt[] = fmt; \ - bpf_trace_printk(____fmt, sizeof(____fmt), \ - ##__VA_ARGS__); \ -}) - -/* - * __bpf_vprintk wraps the bpf_trace_vprintk helper with variadic arguments - * instead of an array of u64. - */ -#define __bpf_vprintk(fmt, args...) \ -({ \ - static const char ___fmt[] = fmt; \ - unsigned long long ___param[___bpf_narg(args)]; \ - \ - _Pragma("GCC diagnostic push") \ - _Pragma("GCC diagnostic ignored \"-Wint-conversion\"") \ - ___bpf_fill(___param, args); \ - _Pragma("GCC diagnostic pop") \ - \ - bpf_trace_vprintk(___fmt, sizeof(___fmt), \ - ___param, sizeof(___param)); \ -}) - -/* Use __bpf_printk when bpf_printk call has 3 or fewer fmt args - * Otherwise use __bpf_vprintk - */ -#define ___bpf_pick_printk(...) \ - ___bpf_nth(_, ##__VA_ARGS__, __bpf_vprintk, __bpf_vprintk, __bpf_vprintk, \ - __bpf_vprintk, __bpf_vprintk, __bpf_vprintk, __bpf_vprintk, \ - __bpf_vprintk, __bpf_vprintk, __bpf_printk /*3*/, __bpf_printk /*2*/,\ - __bpf_printk /*1*/, __bpf_printk /*0*/) - -/* Helper macro to print out debug messages */ -#define bpf_printk(fmt, args...) ___bpf_pick_printk(args)(fmt, ##args) - -#endif diff --git a/component/ebpf/bpf/redir.c b/component/ebpf/bpf/redir.c deleted file mode 100644 index 6ef5ee0c..00000000 --- a/component/ebpf/bpf/redir.c +++ /dev/null @@ -1,342 +0,0 @@ -#include -#include -//#include - -#include -#include -//#include -//#include -#include -#include -#include -//#include - -#include - -#include "bpf_endian.h" -#include "bpf_helpers.h" - -#define IP_CSUM_OFF (ETH_HLEN + offsetof(struct iphdr, check)) -#define IP_DST_OFF (ETH_HLEN + offsetof(struct iphdr, daddr)) -#define IP_SRC_OFF (ETH_HLEN + offsetof(struct iphdr, saddr)) -#define IP_PROTO_OFF (ETH_HLEN + offsetof(struct iphdr, protocol)) -#define TCP_CSUM_OFF (ETH_HLEN + sizeof(struct iphdr) + offsetof(struct tcphdr, check)) -#define TCP_SRC_OFF (ETH_HLEN + sizeof(struct iphdr) + offsetof(struct tcphdr, source)) -#define TCP_DST_OFF (ETH_HLEN + sizeof(struct iphdr) + offsetof(struct tcphdr, dest)) -//#define UDP_CSUM_OFF (ETH_HLEN + sizeof(struct iphdr) + offsetof(struct udphdr, check)) -//#define UDP_SRC_OFF (ETH_HLEN + sizeof(struct iphdr) + offsetof(struct udphdr, source)) -//#define UDP_DST_OFF (ETH_HLEN + sizeof(struct iphdr) + offsetof(struct udphdr, dest)) -#define IS_PSEUDO 0x10 - -struct origin_info { - __be32 ip; - __be16 port; - __u16 pad; -}; - -struct origin_info *origin_info_unused __attribute__((unused)); - -struct redir_info { - __be32 sip; - __be32 dip; - __be16 sport; - __be16 dport; -}; - -struct redir_info *redir_info_unused __attribute__((unused)); - -struct { - __uint(type, BPF_MAP_TYPE_LRU_HASH); - __type(key, struct redir_info); - __type(value, struct origin_info); - __uint(max_entries, 65535); - __uint(pinning, LIBBPF_PIN_BY_NAME); -} pair_original_dst_map SEC(".maps"); - -struct { - __uint(type, BPF_MAP_TYPE_ARRAY); - __type(key, __u32); - __type(value, __u32); - __uint(max_entries, 3); - __uint(pinning, LIBBPF_PIN_BY_NAME); -} redir_params_map SEC(".maps"); - -static __always_inline int rewrite_ip(struct __sk_buff *skb, __be32 new_ip, bool is_dest) { - int ret, off = 0, flags = IS_PSEUDO; - __be32 old_ip; - - if (is_dest) - ret = bpf_skb_load_bytes(skb, IP_DST_OFF, &old_ip, 4); - else - ret = bpf_skb_load_bytes(skb, IP_SRC_OFF, &old_ip, 4); - - if (ret < 0) { - return ret; - } - - off = TCP_CSUM_OFF; -// __u8 proto; -// -// ret = bpf_skb_load_bytes(skb, IP_PROTO_OFF, &proto, 1); -// if (ret < 0) { -// return BPF_DROP; -// } -// -// switch (proto) { -// case IPPROTO_TCP: -// off = TCP_CSUM_OFF; -// break; -// -// case IPPROTO_UDP: -// off = UDP_CSUM_OFF; -// flags |= BPF_F_MARK_MANGLED_0; -// break; -// -// case IPPROTO_ICMPV6: -// off = offsetof(struct icmp6hdr, icmp6_cksum); -// break; -// } -// -// if (off) { - ret = bpf_l4_csum_replace(skb, off, old_ip, new_ip, flags | sizeof(new_ip)); - if (ret < 0) { - return ret; - } -// } - - ret = bpf_l3_csum_replace(skb, IP_CSUM_OFF, old_ip, new_ip, sizeof(new_ip)); - if (ret < 0) { - return ret; - } - - if (is_dest) - ret = bpf_skb_store_bytes(skb, IP_DST_OFF, &new_ip, sizeof(new_ip), 0); - else - ret = bpf_skb_store_bytes(skb, IP_SRC_OFF, &new_ip, sizeof(new_ip), 0); - - if (ret < 0) { - return ret; - } - - return 1; -} - -static __always_inline int rewrite_port(struct __sk_buff *skb, __be16 new_port, bool is_dest) { - int ret, off = 0; - __be16 old_port; - - if (is_dest) - ret = bpf_skb_load_bytes(skb, TCP_DST_OFF, &old_port, 2); - else - ret = bpf_skb_load_bytes(skb, TCP_SRC_OFF, &old_port, 2); - - if (ret < 0) { - return ret; - } - - off = TCP_CSUM_OFF; - - ret = bpf_l4_csum_replace(skb, off, old_port, new_port, sizeof(new_port)); - if (ret < 0) { - return ret; - } - - if (is_dest) - ret = bpf_skb_store_bytes(skb, TCP_DST_OFF, &new_port, sizeof(new_port), 0); - else - ret = bpf_skb_store_bytes(skb, TCP_SRC_OFF, &new_port, sizeof(new_port), 0); - - if (ret < 0) { - return ret; - } - - return 1; -} - -static __always_inline bool is_lan_ip(__be32 addr) { - if (addr == 0xffffffff) - return true; - - __u8 fist = (__u8)(addr & 0xff); - - if (fist == 127 || fist == 10) - return true; - - __u8 second = (__u8)((addr >> 8) & 0xff); - - if (fist == 172 && second >= 16 && second <= 31) - return true; - - if (fist == 192 && second == 168) - return true; - - return false; -} - -SEC("tc_mihomo_auto_redir_ingress") -int tc_redir_ingress_func(struct __sk_buff *skb) { - void *data = (void *)(long)skb->data; - void *data_end = (void *)(long)skb->data_end; - struct ethhdr *eth = data; - - if ((void *)(eth + 1) > data_end) - return TC_ACT_OK; - - if (eth->h_proto != bpf_htons(ETH_P_IP)) - return TC_ACT_OK; - - struct iphdr *iph = (struct iphdr *)(eth + 1); - if ((void *)(iph + 1) > data_end) - return TC_ACT_OK; - - __u32 key = 0, *route_index, *redir_ip, *redir_port; - - route_index = bpf_map_lookup_elem(&redir_params_map, &key); - if (!route_index) - return TC_ACT_OK; - - if (iph->protocol == IPPROTO_ICMP && *route_index != 0) - return bpf_redirect(*route_index, 0); - - if (iph->protocol != IPPROTO_TCP) - return TC_ACT_OK; - - struct tcphdr *tcph = (struct tcphdr *)(iph + 1); - if ((void *)(tcph + 1) > data_end) - return TC_ACT_SHOT; - - key = 1; - redir_ip = bpf_map_lookup_elem(&redir_params_map, &key); - if (!redir_ip) - return TC_ACT_OK; - - key = 2; - redir_port = bpf_map_lookup_elem(&redir_params_map, &key); - if (!redir_port) - return TC_ACT_OK; - - __be32 new_ip = bpf_htonl(*redir_ip); - __be16 new_port = bpf_htonl(*redir_port) >> 16; - __be32 old_ip = iph->daddr; - __be16 old_port = tcph->dest; - - if (old_ip == new_ip || is_lan_ip(old_ip) || bpf_ntohs(old_port) == 53) { - return TC_ACT_OK; - } - - struct redir_info p_key = { - .sip = iph->saddr, - .sport = tcph->source, - .dip = new_ip, - .dport = new_port, - }; - - if (tcph->syn && !tcph->ack) { - struct origin_info origin = { - .ip = old_ip, - .port = old_port, - }; - - bpf_map_update_elem(&pair_original_dst_map, &p_key, &origin, BPF_NOEXIST); - - if (rewrite_ip(skb, new_ip, true) < 0) { - return TC_ACT_SHOT; - } - - if (rewrite_port(skb, new_port, true) < 0) { - return TC_ACT_SHOT; - } - } else { - struct origin_info *origin = bpf_map_lookup_elem(&pair_original_dst_map, &p_key); - if (!origin) { - return TC_ACT_OK; - } - - if (rewrite_ip(skb, new_ip, true) < 0) { - return TC_ACT_SHOT; - } - - if (rewrite_port(skb, new_port, true) < 0) { - return TC_ACT_SHOT; - } - } - - return TC_ACT_OK; -} - -SEC("tc_mihomo_auto_redir_egress") -int tc_redir_egress_func(struct __sk_buff *skb) { - void *data = (void *)(long)skb->data; - void *data_end = (void *)(long)skb->data_end; - struct ethhdr *eth = data; - - if ((void *)(eth + 1) > data_end) - return TC_ACT_OK; - - if (eth->h_proto != bpf_htons(ETH_P_IP)) - return TC_ACT_OK; - - __u32 key = 0, *redir_ip, *redir_port; // *mihomo_mark - -// mihomo_mark = bpf_map_lookup_elem(&redir_params_map, &key); -// if (mihomo_mark && *mihomo_mark != 0 && *mihomo_mark == skb->mark) -// return TC_ACT_OK; - - struct iphdr *iph = (struct iphdr *)(eth + 1); - if ((void *)(iph + 1) > data_end) - return TC_ACT_OK; - - if (iph->protocol != IPPROTO_TCP) - return TC_ACT_OK; - - struct tcphdr *tcph = (struct tcphdr *)(iph + 1); - if ((void *)(tcph + 1) > data_end) - return TC_ACT_SHOT; - - key = 1; - redir_ip = bpf_map_lookup_elem(&redir_params_map, &key); - if (!redir_ip) - return TC_ACT_OK; - - key = 2; - redir_port = bpf_map_lookup_elem(&redir_params_map, &key); - if (!redir_port) - return TC_ACT_OK; - - __be32 new_ip = bpf_htonl(*redir_ip); - __be16 new_port = bpf_htonl(*redir_port) >> 16; - __be32 old_ip = iph->saddr; - __be16 old_port = tcph->source; - - if (old_ip != new_ip || old_port != new_port) { - return TC_ACT_OK; - } - - struct redir_info p_key = { - .sip = iph->daddr, - .sport = tcph->dest, - .dip = iph->saddr, - .dport = tcph->source, - }; - - struct origin_info *origin = bpf_map_lookup_elem(&pair_original_dst_map, &p_key); - if (!origin) { - return TC_ACT_OK; - } - - if (tcph->fin && tcph->ack) { - bpf_map_delete_elem(&pair_original_dst_map, &p_key); - } - - if (rewrite_ip(skb, origin->ip, false) < 0) { - return TC_ACT_SHOT; - } - - if (rewrite_port(skb, origin->port, false) < 0) { - return TC_ACT_SHOT; - } - - return TC_ACT_OK; -} - -char _license[] SEC("license") = "GPL"; diff --git a/component/ebpf/bpf/tc.c b/component/ebpf/bpf/tc.c deleted file mode 100644 index 3513bf04..00000000 --- a/component/ebpf/bpf/tc.c +++ /dev/null @@ -1,103 +0,0 @@ -#include -#include -#include -#include -#include -//#include -//#include -#include - -#include "bpf_endian.h" -#include "bpf_helpers.h" - -struct { - __uint(type, BPF_MAP_TYPE_ARRAY); - __type(key, __u32); - __type(value, __u32); - __uint(max_entries, 2); - __uint(pinning, LIBBPF_PIN_BY_NAME); -} tc_params_map SEC(".maps"); - -static __always_inline bool is_lan_ip(__be32 addr) { - if (addr == 0xffffffff) - return true; - - __u8 fist = (__u8)(addr & 0xff); - - if (fist == 127 || fist == 10) - return true; - - __u8 second = (__u8)((addr >> 8) & 0xff); - - if (fist == 172 && second >= 16 && second <= 31) - return true; - - if (fist == 192 && second == 168) - return true; - - return false; -} - -SEC("tc_mihomo_redirect_to_tun") -int tc_tun_func(struct __sk_buff *skb) { - void *data = (void *)(long)skb->data; - void *data_end = (void *)(long)skb->data_end; - struct ethhdr *eth = data; - - if ((void *)(eth + 1) > data_end) - return TC_ACT_OK; - - if (eth->h_proto == bpf_htons(ETH_P_ARP)) - return TC_ACT_OK; - - __u32 key = 0, *mihomo_mark, *tun_ifindex; - - mihomo_mark = bpf_map_lookup_elem(&tc_params_map, &key); - if (!mihomo_mark) - return TC_ACT_OK; - - if (skb->mark == *mihomo_mark) - return TC_ACT_OK; - - if (eth->h_proto == bpf_htons(ETH_P_IP)) { - struct iphdr *iph = (struct iphdr *)(eth + 1); - if ((void *)(iph + 1) > data_end) - return TC_ACT_OK; - - if (iph->protocol == IPPROTO_ICMP) - return TC_ACT_OK; - - __be32 daddr = iph->daddr; - - if (is_lan_ip(daddr)) - return TC_ACT_OK; - -// if (iph->protocol == IPPROTO_TCP) { -// struct tcphdr *tcph = (struct tcphdr *)(iph + 1); -// if ((void *)(tcph + 1) > data_end) -// return TC_ACT_OK; -// -// __u16 source = bpf_ntohs(tcph->source); -// if (source == 22 || source == 80 || source == 443 || source == 8080 || source == 8443 || source == 9090 || (source >= 7890 && source <= 7895)) -// return TC_ACT_OK; -// } else if (iph->protocol == IPPROTO_UDP) { -// struct udphdr *udph = (struct udphdr *)(iph + 1); -// if ((void *)(udph + 1) > data_end) -// return TC_ACT_OK; -// -// __u16 source = bpf_ntohs(udph->source); -// if (source == 53 || (source >= 135 && source <= 139)) -// return TC_ACT_OK; -// } - } - - key = 1; - tun_ifindex = bpf_map_lookup_elem(&tc_params_map, &key); - if (!tun_ifindex) - return TC_ACT_OK; - - //return bpf_redirect(*tun_ifindex, BPF_F_INGRESS); // __bpf_rx_skb - return bpf_redirect(*tun_ifindex, 0); // __bpf_tx_skb / __dev_xmit_skb -} - -char _license[] SEC("license") = "GPL"; diff --git a/component/ebpf/byteorder/byteorder.go b/component/ebpf/byteorder/byteorder.go deleted file mode 100644 index 63e0c611..00000000 --- a/component/ebpf/byteorder/byteorder.go +++ /dev/null @@ -1,13 +0,0 @@ -package byteorder - -import ( - "net" -) - -// NetIPv4ToHost32 converts an net.IP to a uint32 in host byte order. ip -// must be a IPv4 address, otherwise the function will panic. -func NetIPv4ToHost32(ip net.IP) uint32 { - ipv4 := ip.To4() - _ = ipv4[3] // Assert length of ipv4. - return Native.Uint32(ipv4) -} diff --git a/component/ebpf/byteorder/byteorder_bigendian.go b/component/ebpf/byteorder/byteorder_bigendian.go deleted file mode 100644 index 4c5d7105..00000000 --- a/component/ebpf/byteorder/byteorder_bigendian.go +++ /dev/null @@ -1,12 +0,0 @@ -//go:build arm64be || armbe || mips || mips64 || mips64p32 || ppc64 || s390 || s390x || sparc || sparc64 - -package byteorder - -import "encoding/binary" - -var Native binary.ByteOrder = binary.BigEndian - -func HostToNetwork16(u uint16) uint16 { return u } -func HostToNetwork32(u uint32) uint32 { return u } -func NetworkToHost16(u uint16) uint16 { return u } -func NetworkToHost32(u uint32) uint32 { return u } diff --git a/component/ebpf/byteorder/byteorder_littleendian.go b/component/ebpf/byteorder/byteorder_littleendian.go deleted file mode 100644 index d40f3517..00000000 --- a/component/ebpf/byteorder/byteorder_littleendian.go +++ /dev/null @@ -1,15 +0,0 @@ -//go:build 386 || amd64 || amd64p32 || arm || arm64 || mips64le || mips64p32le || mipsle || ppc64le || riscv64 || loong64 - -package byteorder - -import ( - "encoding/binary" - "math/bits" -) - -var Native binary.ByteOrder = binary.LittleEndian - -func HostToNetwork16(u uint16) uint16 { return bits.ReverseBytes16(u) } -func HostToNetwork32(u uint32) uint32 { return bits.ReverseBytes32(u) } -func NetworkToHost16(u uint16) uint16 { return bits.ReverseBytes16(u) } -func NetworkToHost32(u uint32) uint32 { return bits.ReverseBytes32(u) } diff --git a/component/ebpf/ebpf.go b/component/ebpf/ebpf.go deleted file mode 100644 index b0f5a65f..00000000 --- a/component/ebpf/ebpf.go +++ /dev/null @@ -1,33 +0,0 @@ -package ebpf - -import ( - "net/netip" - - C "github.com/metacubex/mihomo/constant" - "github.com/metacubex/mihomo/transport/socks5" -) - -type TcEBpfProgram struct { - pros []C.EBpf - rawNICs []string -} - -func (t *TcEBpfProgram) RawNICs() []string { - return t.rawNICs -} - -func (t *TcEBpfProgram) Close() { - for _, p := range t.pros { - p.Close() - } -} - -func (t *TcEBpfProgram) Lookup(srcAddrPort netip.AddrPort) (addr socks5.Addr, err error) { - for _, p := range t.pros { - addr, err = p.Lookup(srcAddrPort) - if err == nil { - return - } - } - return -} diff --git a/component/ebpf/ebpf_linux.go b/component/ebpf/ebpf_linux.go deleted file mode 100644 index 304f32fe..00000000 --- a/component/ebpf/ebpf_linux.go +++ /dev/null @@ -1,137 +0,0 @@ -//go:build !android - -package ebpf - -import ( - "fmt" - "net/netip" - - "github.com/metacubex/mihomo/common/cmd" - "github.com/metacubex/mihomo/component/dialer" - "github.com/metacubex/mihomo/component/ebpf/redir" - "github.com/metacubex/mihomo/component/ebpf/tc" - C "github.com/metacubex/mihomo/constant" - "github.com/sagernet/netlink" -) - -func GetAutoDetectInterface() (string, error) { - routes, err := netlink.RouteList(nil, netlink.FAMILY_V4) - if err != nil { - return "", err - } - - for _, route := range routes { - if route.Dst == nil { - lk, err := netlink.LinkByIndex(route.LinkIndex) - if err != nil { - return "", err - } - - if lk.Type() == "tuntap" { - continue - } - - return lk.Attrs().Name, nil - } - } - - return "", fmt.Errorf("interface not found") -} - -// NewTcEBpfProgram new redirect to tun ebpf program -func NewTcEBpfProgram(ifaceNames []string, tunName string) (*TcEBpfProgram, error) { - tunIface, err := netlink.LinkByName(tunName) - if err != nil { - return nil, fmt.Errorf("lookup network iface %q: %w", tunName, err) - } - - tunIndex := uint32(tunIface.Attrs().Index) - - dialer.DefaultRoutingMark.Store(C.MihomoTrafficMark) - - ifMark := uint32(dialer.DefaultRoutingMark.Load()) - - var pros []C.EBpf - for _, ifaceName := range ifaceNames { - iface, err := netlink.LinkByName(ifaceName) - if err != nil { - return nil, fmt.Errorf("lookup network iface %q: %w", ifaceName, err) - } - if iface.Attrs().OperState != netlink.OperUp { - return nil, fmt.Errorf("network iface %q is down", ifaceName) - } - - attrs := iface.Attrs() - index := attrs.Index - - tcPro := tc.NewEBpfTc(ifaceName, index, ifMark, tunIndex) - if err = tcPro.Start(); err != nil { - return nil, err - } - - pros = append(pros, tcPro) - } - - systemSetting(ifaceNames...) - - return &TcEBpfProgram{pros: pros, rawNICs: ifaceNames}, nil -} - -// NewRedirEBpfProgram new auto redirect ebpf program -func NewRedirEBpfProgram(ifaceNames []string, redirPort uint16, defaultRouteInterfaceName string) (*TcEBpfProgram, error) { - defaultRouteInterface, err := netlink.LinkByName(defaultRouteInterfaceName) - if err != nil { - return nil, fmt.Errorf("lookup network iface %q: %w", defaultRouteInterfaceName, err) - } - - defaultRouteIndex := uint32(defaultRouteInterface.Attrs().Index) - - var pros []C.EBpf - for _, ifaceName := range ifaceNames { - iface, err := netlink.LinkByName(ifaceName) - if err != nil { - return nil, fmt.Errorf("lookup network iface %q: %w", ifaceName, err) - } - - attrs := iface.Attrs() - index := attrs.Index - - addrs, err := netlink.AddrList(iface, netlink.FAMILY_V4) - if err != nil { - return nil, fmt.Errorf("lookup network iface %q address: %w", ifaceName, err) - } - - if len(addrs) == 0 { - return nil, fmt.Errorf("network iface %q does not contain any ipv4 addresses", ifaceName) - } - - address, _ := netip.AddrFromSlice(addrs[0].IP) - redirAddrPort := netip.AddrPortFrom(address, redirPort) - - redirPro := redir.NewEBpfRedirect(ifaceName, index, 0, defaultRouteIndex, redirAddrPort) - if err = redirPro.Start(); err != nil { - return nil, err - } - - pros = append(pros, redirPro) - } - - systemSetting(ifaceNames...) - - return &TcEBpfProgram{pros: pros, rawNICs: ifaceNames}, nil -} - -func systemSetting(ifaceNames ...string) { - _, _ = cmd.ExecCmd("sysctl -w net.ipv4.ip_forward=1") - _, _ = cmd.ExecCmd("sysctl -w net.ipv4.conf.all.forwarding=1") - _, _ = cmd.ExecCmd("sysctl -w net.ipv4.conf.all.accept_local=1") - _, _ = cmd.ExecCmd("sysctl -w net.ipv4.conf.all.accept_redirects=1") - _, _ = cmd.ExecCmd("sysctl -w net.ipv4.conf.all.rp_filter=0") - - for _, ifaceName := range ifaceNames { - _, _ = cmd.ExecCmd(fmt.Sprintf("sysctl -w net.ipv4.conf.%s.forwarding=1", ifaceName)) - _, _ = cmd.ExecCmd(fmt.Sprintf("sysctl -w net.ipv4.conf.%s.accept_local=1", ifaceName)) - _, _ = cmd.ExecCmd(fmt.Sprintf("sysctl -w net.ipv4.conf.%s.accept_redirects=1", ifaceName)) - _, _ = cmd.ExecCmd(fmt.Sprintf("sysctl -w net.ipv4.conf.%s.rp_filter=0", ifaceName)) - } -} diff --git a/component/ebpf/ebpf_others.go b/component/ebpf/ebpf_others.go deleted file mode 100644 index 44cf1c3a..00000000 --- a/component/ebpf/ebpf_others.go +++ /dev/null @@ -1,21 +0,0 @@ -//go:build !linux || android - -package ebpf - -import ( - "fmt" -) - -// NewTcEBpfProgram new ebpf tc program -func NewTcEBpfProgram(_ []string, _ string) (*TcEBpfProgram, error) { - return nil, fmt.Errorf("system not supported") -} - -// NewRedirEBpfProgram new ebpf redirect program -func NewRedirEBpfProgram(_ []string, _ uint16, _ string) (*TcEBpfProgram, error) { - return nil, fmt.Errorf("system not supported") -} - -func GetAutoDetectInterface() (string, error) { - return "", fmt.Errorf("system not supported") -} diff --git a/component/ebpf/redir/auto_redirect.go b/component/ebpf/redir/auto_redirect.go deleted file mode 100644 index 57c99616..00000000 --- a/component/ebpf/redir/auto_redirect.go +++ /dev/null @@ -1,216 +0,0 @@ -//go:build linux - -package redir - -import ( - "encoding/binary" - "fmt" - "io" - "net" - "net/netip" - "os" - "path/filepath" - - "github.com/cilium/ebpf" - "github.com/cilium/ebpf/rlimit" - "github.com/sagernet/netlink" - "golang.org/x/sys/unix" - - "github.com/metacubex/mihomo/component/ebpf/byteorder" - C "github.com/metacubex/mihomo/constant" - "github.com/metacubex/mihomo/transport/socks5" -) - -//go:generate go run github.com/cilium/ebpf/cmd/bpf2go -cc $BPF_CLANG -cflags $BPF_CFLAGS bpf ../bpf/redir.c - -const ( - mapKey1 uint32 = 0 - mapKey2 uint32 = 1 - mapKey3 uint32 = 2 -) - -type EBpfRedirect struct { - objs io.Closer - originMap *ebpf.Map - qdisc netlink.Qdisc - filter netlink.Filter - filterEgress netlink.Filter - - ifName string - ifIndex int - ifMark uint32 - rtIndex uint32 - redirIp uint32 - redirPort uint16 - - bpfPath string -} - -func NewEBpfRedirect(ifName string, ifIndex int, ifMark uint32, routeIndex uint32, redirAddrPort netip.AddrPort) *EBpfRedirect { - return &EBpfRedirect{ - ifName: ifName, - ifIndex: ifIndex, - ifMark: ifMark, - rtIndex: routeIndex, - redirIp: binary.BigEndian.Uint32(redirAddrPort.Addr().AsSlice()), - redirPort: redirAddrPort.Port(), - } -} - -func (e *EBpfRedirect) Start() error { - if err := rlimit.RemoveMemlock(); err != nil { - return fmt.Errorf("remove memory lock: %w", err) - } - - e.bpfPath = filepath.Join(C.BpfFSPath, e.ifName) - if err := os.MkdirAll(e.bpfPath, os.ModePerm); err != nil { - return fmt.Errorf("failed to create bpf fs subpath: %w", err) - } - - var objs bpfObjects - if err := loadBpfObjects(&objs, &ebpf.CollectionOptions{ - Maps: ebpf.MapOptions{ - PinPath: e.bpfPath, - }, - }); err != nil { - e.Close() - return fmt.Errorf("loading objects: %w", err) - } - - e.objs = &objs - e.originMap = objs.bpfMaps.PairOriginalDstMap - - if err := objs.bpfMaps.RedirParamsMap.Update(mapKey1, e.rtIndex, ebpf.UpdateAny); err != nil { - e.Close() - return fmt.Errorf("storing objects: %w", err) - } - - if err := objs.bpfMaps.RedirParamsMap.Update(mapKey2, e.redirIp, ebpf.UpdateAny); err != nil { - e.Close() - return fmt.Errorf("storing objects: %w", err) - } - - if err := objs.bpfMaps.RedirParamsMap.Update(mapKey3, uint32(e.redirPort), ebpf.UpdateAny); err != nil { - e.Close() - return fmt.Errorf("storing objects: %w", err) - } - - attrs := netlink.QdiscAttrs{ - LinkIndex: e.ifIndex, - Handle: netlink.MakeHandle(0xffff, 0), - Parent: netlink.HANDLE_CLSACT, - } - - qdisc := &netlink.GenericQdisc{ - QdiscAttrs: attrs, - QdiscType: "clsact", - } - - e.qdisc = qdisc - - if err := netlink.QdiscAdd(qdisc); err != nil { - if os.IsExist(err) { - _ = netlink.QdiscDel(qdisc) - err = netlink.QdiscAdd(qdisc) - } - - if err != nil { - e.Close() - return fmt.Errorf("cannot add clsact qdisc: %w", err) - } - } - - filterAttrs := netlink.FilterAttrs{ - LinkIndex: e.ifIndex, - Parent: netlink.HANDLE_MIN_INGRESS, - Handle: netlink.MakeHandle(0, 1), - Protocol: unix.ETH_P_IP, - Priority: 0, - } - - filter := &netlink.BpfFilter{ - FilterAttrs: filterAttrs, - Fd: objs.bpfPrograms.TcRedirIngressFunc.FD(), - Name: "mihomo-redir-ingress-" + e.ifName, - DirectAction: true, - } - - if err := netlink.FilterAdd(filter); err != nil { - e.Close() - return fmt.Errorf("cannot attach ebpf object to filter ingress: %w", err) - } - - e.filter = filter - - filterAttrsEgress := netlink.FilterAttrs{ - LinkIndex: e.ifIndex, - Parent: netlink.HANDLE_MIN_EGRESS, - Handle: netlink.MakeHandle(0, 1), - Protocol: unix.ETH_P_IP, - Priority: 0, - } - - filterEgress := &netlink.BpfFilter{ - FilterAttrs: filterAttrsEgress, - Fd: objs.bpfPrograms.TcRedirEgressFunc.FD(), - Name: "mihomo-redir-egress-" + e.ifName, - DirectAction: true, - } - - if err := netlink.FilterAdd(filterEgress); err != nil { - e.Close() - return fmt.Errorf("cannot attach ebpf object to filter egress: %w", err) - } - - e.filterEgress = filterEgress - - return nil -} - -func (e *EBpfRedirect) Close() { - if e.filter != nil { - _ = netlink.FilterDel(e.filter) - } - if e.filterEgress != nil { - _ = netlink.FilterDel(e.filterEgress) - } - if e.qdisc != nil { - _ = netlink.QdiscDel(e.qdisc) - } - if e.objs != nil { - _ = e.objs.Close() - } - _ = os.Remove(filepath.Join(e.bpfPath, "redir_params_map")) - _ = os.Remove(filepath.Join(e.bpfPath, "pair_original_dst_map")) -} - -func (e *EBpfRedirect) Lookup(srcAddrPort netip.AddrPort) (socks5.Addr, error) { - rAddr := srcAddrPort.Addr().Unmap() - if rAddr.Is6() { - return nil, fmt.Errorf("remote address is ipv6") - } - - srcIp := binary.BigEndian.Uint32(rAddr.AsSlice()) - scrPort := srcAddrPort.Port() - - key := bpfRedirInfo{ - Sip: byteorder.HostToNetwork32(srcIp), - Sport: byteorder.HostToNetwork16(scrPort), - Dip: byteorder.HostToNetwork32(e.redirIp), - Dport: byteorder.HostToNetwork16(e.redirPort), - } - - origin := bpfOriginInfo{} - - err := e.originMap.Lookup(key, &origin) - if err != nil { - return nil, err - } - - addr := make([]byte, net.IPv4len+3) - addr[0] = socks5.AtypIPv4 - - binary.BigEndian.PutUint32(addr[1:1+net.IPv4len], byteorder.NetworkToHost32(origin.Ip)) // big end - binary.BigEndian.PutUint16(addr[1+net.IPv4len:3+net.IPv4len], byteorder.NetworkToHost16(origin.Port)) // big end - return addr, nil -} diff --git a/component/ebpf/redir/bpf_bpfeb.go b/component/ebpf/redir/bpf_bpfeb.go deleted file mode 100644 index 57a526e8..00000000 --- a/component/ebpf/redir/bpf_bpfeb.go +++ /dev/null @@ -1,139 +0,0 @@ -// Code generated by bpf2go; DO NOT EDIT. -//go:build arm64be || armbe || mips || mips64 || mips64p32 || ppc64 || s390 || s390x || sparc || sparc64 -// +build arm64be armbe mips mips64 mips64p32 ppc64 s390 s390x sparc sparc64 - -package redir - -import ( - "bytes" - _ "embed" - "fmt" - "io" - - "github.com/cilium/ebpf" -) - -type bpfOriginInfo struct { - Ip uint32 - Port uint16 - Pad uint16 -} - -type bpfRedirInfo struct { - Sip uint32 - Dip uint32 - Sport uint16 - Dport uint16 -} - -// loadBpf returns the embedded CollectionSpec for bpf. -func loadBpf() (*ebpf.CollectionSpec, error) { - reader := bytes.NewReader(_BpfBytes) - spec, err := ebpf.LoadCollectionSpecFromReader(reader) - if err != nil { - return nil, fmt.Errorf("can't load bpf: %w", err) - } - - return spec, err -} - -// loadBpfObjects loads bpf and converts it into a struct. -// -// The following types are suitable as obj argument: -// -// *bpfObjects -// *bpfPrograms -// *bpfMaps -// -// See ebpf.CollectionSpec.LoadAndAssign documentation for details. -func loadBpfObjects(obj interface{}, opts *ebpf.CollectionOptions) error { - spec, err := loadBpf() - if err != nil { - return err - } - - return spec.LoadAndAssign(obj, opts) -} - -// bpfSpecs contains maps and programs before they are loaded into the kernel. -// -// It can be passed ebpf.CollectionSpec.Assign. -type bpfSpecs struct { - bpfProgramSpecs - bpfMapSpecs -} - -// bpfSpecs contains programs before they are loaded into the kernel. -// -// It can be passed ebpf.CollectionSpec.Assign. -type bpfProgramSpecs struct { - TcRedirEgressFunc *ebpf.ProgramSpec `ebpf:"tc_redir_egress_func"` - TcRedirIngressFunc *ebpf.ProgramSpec `ebpf:"tc_redir_ingress_func"` -} - -// bpfMapSpecs contains maps before they are loaded into the kernel. -// -// It can be passed ebpf.CollectionSpec.Assign. -type bpfMapSpecs struct { - PairOriginalDstMap *ebpf.MapSpec `ebpf:"pair_original_dst_map"` - RedirParamsMap *ebpf.MapSpec `ebpf:"redir_params_map"` -} - -// bpfObjects contains all objects after they have been loaded into the kernel. -// -// It can be passed to loadBpfObjects or ebpf.CollectionSpec.LoadAndAssign. -type bpfObjects struct { - bpfPrograms - bpfMaps -} - -func (o *bpfObjects) Close() error { - return _BpfClose( - &o.bpfPrograms, - &o.bpfMaps, - ) -} - -// bpfMaps contains all maps after they have been loaded into the kernel. -// -// It can be passed to loadBpfObjects or ebpf.CollectionSpec.LoadAndAssign. -type bpfMaps struct { - PairOriginalDstMap *ebpf.Map `ebpf:"pair_original_dst_map"` - RedirParamsMap *ebpf.Map `ebpf:"redir_params_map"` -} - -func (m *bpfMaps) Close() error { - return _BpfClose( - m.PairOriginalDstMap, - m.RedirParamsMap, - ) -} - -// bpfPrograms contains all programs after they have been loaded into the kernel. -// -// It can be passed to loadBpfObjects or ebpf.CollectionSpec.LoadAndAssign. -type bpfPrograms struct { - TcRedirEgressFunc *ebpf.Program `ebpf:"tc_redir_egress_func"` - TcRedirIngressFunc *ebpf.Program `ebpf:"tc_redir_ingress_func"` -} - -func (p *bpfPrograms) Close() error { - return _BpfClose( - p.TcRedirEgressFunc, - p.TcRedirIngressFunc, - ) -} - -func _BpfClose(closers 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-package tc - -import ( - "bytes" - _ "embed" - "fmt" - "io" - - "github.com/cilium/ebpf" -) - -// loadBpf returns the embedded CollectionSpec for bpf. -func loadBpf() (*ebpf.CollectionSpec, error) { - reader := bytes.NewReader(_BpfBytes) - spec, err := ebpf.LoadCollectionSpecFromReader(reader) - if err != nil { - return nil, fmt.Errorf("can't load bpf: %w", err) - } - - return spec, err -} - -// loadBpfObjects loads bpf and converts it into a struct. -// -// The following types are suitable as obj argument: -// -// *bpfObjects -// *bpfPrograms -// *bpfMaps -// -// See ebpf.CollectionSpec.LoadAndAssign documentation for details. -func loadBpfObjects(obj interface{}, opts *ebpf.CollectionOptions) error { - spec, err := loadBpf() - if err != nil { - return err - } - - return spec.LoadAndAssign(obj, opts) -} - -// bpfSpecs contains maps and programs before they are loaded into the kernel. -// -// It can be passed ebpf.CollectionSpec.Assign. -type bpfSpecs struct { - bpfProgramSpecs - bpfMapSpecs -} - -// bpfSpecs contains programs before they are loaded into the kernel. -// -// It can be passed ebpf.CollectionSpec.Assign. -type bpfProgramSpecs struct { - TcTunFunc *ebpf.ProgramSpec `ebpf:"tc_tun_func"` -} - -// bpfMapSpecs contains maps before they are loaded into the kernel. -// -// It can be passed ebpf.CollectionSpec.Assign. -type bpfMapSpecs struct { - TcParamsMap *ebpf.MapSpec `ebpf:"tc_params_map"` -} - -// bpfObjects contains all objects after they have been loaded into the kernel. -// -// It can be passed to loadBpfObjects or ebpf.CollectionSpec.LoadAndAssign. -type bpfObjects struct { - bpfPrograms - bpfMaps -} - -func (o *bpfObjects) Close() error { - return _BpfClose( - &o.bpfPrograms, - &o.bpfMaps, - ) -} - -// bpfMaps contains all maps after they have been loaded into the kernel. -// -// It can be passed to loadBpfObjects or ebpf.CollectionSpec.LoadAndAssign. -type bpfMaps struct { - TcParamsMap *ebpf.Map `ebpf:"tc_params_map"` -} - -func (m *bpfMaps) Close() error { - return _BpfClose( - m.TcParamsMap, - ) -} - -// bpfPrograms contains all programs after they have been loaded into the kernel. -// -// It can be passed to loadBpfObjects or ebpf.CollectionSpec.LoadAndAssign. -type bpfPrograms struct { - TcTunFunc *ebpf.Program `ebpf:"tc_tun_func"` -} - -func (p *bpfPrograms) Close() error { - return _BpfClose( - p.TcTunFunc, - ) -} - -func _BpfClose(closers ...io.Closer) error { - for _, closer := range closers { - if err := closer.Close(); err != nil { - return err - } - } - return nil -} - -// Do not access this directly. -// -//go:embed bpf_bpfeb.o -var _BpfBytes []byte diff --git a/component/ebpf/tc/bpf_bpfeb.o b/component/ebpf/tc/bpf_bpfeb.o deleted file mode 100644 index f0e7e608f54b58168a4598bf254cedd82c996a43..0000000000000000000000000000000000000000 GIT binary patch literal 0 HcmV?d00001 literal 5168 zcmb_fZ-`u16+drw(yVQ=U8}L1NbHS;IGb)}casJFZbW!mdz8U zeZL~=_xtZm7{5k{?^g}y93nc-tS9Z>$7q!C(PQ*5)4TQmX+;m9|7`ppMf@KY`v;jG 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for bpf. -func loadBpf() (*ebpf.CollectionSpec, error) { - reader := bytes.NewReader(_BpfBytes) - spec, err := ebpf.LoadCollectionSpecFromReader(reader) - if err != nil { - return nil, fmt.Errorf("can't load bpf: %w", err) - } - - return spec, err -} - -// loadBpfObjects loads bpf and converts it into a struct. -// -// The following types are suitable as obj argument: -// -// *bpfObjects -// *bpfPrograms -// *bpfMaps -// -// See ebpf.CollectionSpec.LoadAndAssign documentation for details. -func loadBpfObjects(obj interface{}, opts *ebpf.CollectionOptions) error { - spec, err := loadBpf() - if err != nil { - return err - } - - return spec.LoadAndAssign(obj, opts) -} - -// bpfSpecs contains maps and programs before they are loaded into the kernel. -// -// It can be passed ebpf.CollectionSpec.Assign. -type bpfSpecs struct { - bpfProgramSpecs - bpfMapSpecs -} - -// bpfSpecs contains programs before they are loaded into the kernel. -// -// It can be passed ebpf.CollectionSpec.Assign. -type bpfProgramSpecs struct { - TcTunFunc *ebpf.ProgramSpec `ebpf:"tc_tun_func"` -} - -// bpfMapSpecs contains maps before they are loaded into the kernel. -// -// It can be passed ebpf.CollectionSpec.Assign. -type bpfMapSpecs struct { - TcParamsMap *ebpf.MapSpec `ebpf:"tc_params_map"` -} - -// bpfObjects contains all objects after they have been loaded into the kernel. -// -// It can be passed to loadBpfObjects or ebpf.CollectionSpec.LoadAndAssign. -type bpfObjects struct { - bpfPrograms - bpfMaps -} - -func (o *bpfObjects) Close() error { - return _BpfClose( - &o.bpfPrograms, - &o.bpfMaps, - ) -} - -// bpfMaps contains all maps after they have been loaded into the kernel. -// -// It can be passed to loadBpfObjects or ebpf.CollectionSpec.LoadAndAssign. -type bpfMaps struct { - TcParamsMap *ebpf.Map `ebpf:"tc_params_map"` -} - -func (m *bpfMaps) Close() error { - return _BpfClose( - m.TcParamsMap, - ) -} - -// bpfPrograms contains all programs after they have been loaded into the kernel. -// -// It can be passed to loadBpfObjects or ebpf.CollectionSpec.LoadAndAssign. -type bpfPrograms struct { - TcTunFunc *ebpf.Program `ebpf:"tc_tun_func"` -} - -func (p *bpfPrograms) Close() error { - return _BpfClose( - p.TcTunFunc, - ) -} - -func _BpfClose(closers ...io.Closer) error { - for _, closer := range closers { - if err := closer.Close(); err != nil { - return err - } - } - return nil -} - -// Do not access this directly. -// -//go:embed bpf_bpfel.o -var _BpfBytes []byte diff --git a/component/ebpf/tc/bpf_bpfel.o b/component/ebpf/tc/bpf_bpfel.o deleted file mode 100644 index 290ae9cad7b7873a457a1a8757c0bee298fa8840..0000000000000000000000000000000000000000 GIT binary patch literal 0 HcmV?d00001 literal 5168 zcmbtYZ)jXu6+bi0+QcSlH*0FPQoZX!nRJs$(tj3e%d|^&w-D*jjc!*hFE2B1GSAGP zxAWd)6RqrYK~zv_VFf|du!8hMkqY82vXFdJ{8U6iP$c3vl{FxuAIiqxx%b?em%CZ( zpF`d|zu&p%o_p@O_r3cjuguOplg(tvN{0SHJ!Y*$+lP9%pkaZA;JNWZV}Ij)M*C|; z4gA$Ptv7BO`+fu+2AsToQX5{nIcW5&Ls~CoiTZ)AjA%-u**x_lrj1+r+=Cr%*?8Tw 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zitO^bso6dqE8Xx_u}4nW&%!>EinAr{eC9uz`s&F^u;;biew~_c0&eQ?4Z_{|vjEf4 zV)<*RISZzy+wZ10N1NbA2)A>e0xlNIi-vajg2N++cN~7p;p+~+=kQI3-*@)8hZh`Pbohe9BZqe!e#_zO4!`H{O^4ri_?E-B9Zq;Bu-N(9cbw(Q zX&)LsNckjKO(@?AYWYj^&*U}HFV@3NY`pEhw>`RYA!rnO+y zyY5`ywD5EF@A}(yw0-(55Y5j$|28fNw`z=k5JHr`o8KcmPupLnr_VSZ->rdNe~zCP z+uz#e0ru+uTx$PVU)JoKmKz|hjoas>|6iQ}-TJMZwv>;M1& diff --git a/component/ebpf/tc/redirect_to_tun.go b/component/ebpf/tc/redirect_to_tun.go deleted file mode 100644 index d7be64af..00000000 --- a/component/ebpf/tc/redirect_to_tun.go +++ /dev/null @@ -1,147 +0,0 @@ -//go:build linux - -package tc - -import ( - "fmt" - "io" - "net/netip" - "os" - "path/filepath" - - "github.com/cilium/ebpf" - "github.com/cilium/ebpf/rlimit" - "github.com/sagernet/netlink" - "golang.org/x/sys/unix" - - C "github.com/metacubex/mihomo/constant" - "github.com/metacubex/mihomo/transport/socks5" -) - -//go:generate go run github.com/cilium/ebpf/cmd/bpf2go -cc $BPF_CLANG -cflags $BPF_CFLAGS bpf ../bpf/tc.c - -const ( - mapKey1 uint32 = 0 - mapKey2 uint32 = 1 -) - -type EBpfTC struct { - objs io.Closer - qdisc netlink.Qdisc - filter netlink.Filter - - ifName string - ifIndex int - ifMark uint32 - tunIfIndex uint32 - - bpfPath string -} - -func NewEBpfTc(ifName string, ifIndex int, ifMark uint32, tunIfIndex uint32) *EBpfTC { - return &EBpfTC{ - ifName: ifName, - ifIndex: ifIndex, - ifMark: ifMark, - tunIfIndex: tunIfIndex, - } -} - -func (e *EBpfTC) Start() error { - if err := rlimit.RemoveMemlock(); err != nil { - return fmt.Errorf("remove memory lock: %w", err) - } - - e.bpfPath = filepath.Join(C.BpfFSPath, e.ifName) - if err := os.MkdirAll(e.bpfPath, os.ModePerm); err != nil { - return fmt.Errorf("failed to create bpf fs subpath: %w", err) - } - - var objs bpfObjects - if err := loadBpfObjects(&objs, &ebpf.CollectionOptions{ - Maps: ebpf.MapOptions{ - PinPath: e.bpfPath, - }, - }); err != nil { - e.Close() - return fmt.Errorf("loading objects: %w", err) - } - - e.objs = &objs - - if err := objs.bpfMaps.TcParamsMap.Update(mapKey1, e.ifMark, ebpf.UpdateAny); err != nil { - e.Close() - return fmt.Errorf("storing objects: %w", err) - } - - if err := objs.bpfMaps.TcParamsMap.Update(mapKey2, e.tunIfIndex, ebpf.UpdateAny); err != nil { - e.Close() - return fmt.Errorf("storing objects: %w", err) - } - - attrs := netlink.QdiscAttrs{ - LinkIndex: e.ifIndex, - Handle: netlink.MakeHandle(0xffff, 0), - Parent: netlink.HANDLE_CLSACT, - } - - qdisc := &netlink.GenericQdisc{ - QdiscAttrs: attrs, - QdiscType: "clsact", - } - - e.qdisc = qdisc - - if err := netlink.QdiscAdd(qdisc); err != nil { - if os.IsExist(err) { - _ = netlink.QdiscDel(qdisc) - err = netlink.QdiscAdd(qdisc) - } - - if err != nil { - e.Close() - return fmt.Errorf("cannot add clsact qdisc: %w", err) - } - } - - filterAttrs := netlink.FilterAttrs{ - LinkIndex: e.ifIndex, - Parent: netlink.HANDLE_MIN_EGRESS, - Handle: netlink.MakeHandle(0, 1), - Protocol: unix.ETH_P_ALL, - Priority: 1, - } - - filter := &netlink.BpfFilter{ - FilterAttrs: filterAttrs, - Fd: objs.bpfPrograms.TcTunFunc.FD(), - Name: "mihomo-tc-" + e.ifName, - DirectAction: true, - } - - if err := netlink.FilterAdd(filter); err != nil { - e.Close() - return fmt.Errorf("cannot attach ebpf object to filter: %w", err) - } - - e.filter = filter - - return nil -} - -func (e *EBpfTC) Close() { - if e.filter != nil { - _ = netlink.FilterDel(e.filter) - } - if e.qdisc != nil { - _ = netlink.QdiscDel(e.qdisc) - } - if e.objs != nil { - _ = e.objs.Close() - } - _ = os.Remove(filepath.Join(e.bpfPath, "tc_params_map")) -} - -func (e *EBpfTC) Lookup(_ netip.AddrPort) (socks5.Addr, error) { - return nil, fmt.Errorf("not supported") -} diff --git a/config/config.go b/config/config.go index d4868c02..788f227b 100644 --- a/config/config.go +++ b/config/config.go @@ -66,7 +66,6 @@ type General struct { TCPConcurrent bool `json:"tcp-concurrent"` FindProcessMode P.FindProcessMode `json:"find-process-mode"` Sniffing bool `json:"sniffing"` - EBpf EBpf `json:"-"` GlobalClientFingerprint string `json:"global-client-fingerprint"` GlobalUA string `json:"global-ua"` } @@ -343,7 +342,6 @@ type RawConfig struct { DNS RawDNS `yaml:"dns" json:"dns"` Tun RawTun `yaml:"tun"` TuicServer RawTuicServer `yaml:"tuic-server"` - EBpf EBpf `yaml:"ebpf"` IPTables IPTables `yaml:"iptables"` Experimental Experimental `yaml:"experimental"` Profile Profile `yaml:"profile"` @@ -382,12 +380,6 @@ type RawSniffingConfig struct { OverrideDest *bool `yaml:"override-destination" json:"override-destination"` } -// EBpf config -type EBpf struct { - RedirectToTun []string `yaml:"redirect-to-tun" json:"redirect-to-tun"` - AutoRedir []string `yaml:"auto-redir" json:"auto-redir"` -} - var ( GroupsList = list.New() ProxiesList = list.New() @@ -448,10 +440,6 @@ func UnmarshalRawConfig(buf []byte) (*RawConfig, error) { ALPN: []string{"h3"}, MaxUdpRelayPacketSize: 1500, }, - EBpf: EBpf{ - RedirectToTun: []string{}, - AutoRedir: []string{}, - }, IPTables: IPTables{ Enable: false, InboundInterface: "lo", @@ -720,7 +708,6 @@ func parseGeneral(cfg *RawConfig) (*General, error) { GeodataLoader: cfg.GeodataLoader, TCPConcurrent: cfg.TCPConcurrent, FindProcessMode: cfg.FindProcessMode, - EBpf: cfg.EBpf, GlobalClientFingerprint: cfg.GlobalClientFingerprint, GlobalUA: cfg.GlobalUA, }, nil diff --git a/constant/ebpf.go b/constant/ebpf.go deleted file mode 100644 index e3bb62fe..00000000 --- a/constant/ebpf.go +++ /dev/null @@ -1,20 +0,0 @@ -package constant - -import ( - "net/netip" - - "github.com/metacubex/mihomo/transport/socks5" -) - -const ( - BpfFSPath = "/sys/fs/bpf/mihomo" - - TcpAutoRedirPort = 't'<<8 | 'r'<<0 - MihomoTrafficMark = 'c'<<24 | 'l'<<16 | 't'<<8 | 'm'<<0 -) - -type EBpf interface { - Start() error - Close() - Lookup(srcAddrPort netip.AddrPort) (socks5.Addr, error) -} diff --git a/docs/config.yaml b/docs/config.yaml index 8db06b6d..647cf14c 100644 --- a/docs/config.yaml +++ b/docs/config.yaml @@ -166,13 +166,6 @@ tun: # exclude-package: # 排除被路由的 Android 应用包名 # - com.android.captiveportallogin -#ebpf 配置 -ebpf: - auto-redir: # redirect 模式，仅支持 TCP - - eth0 - redirect-to-tun: # UDP+TCP 使用该功能请勿启用 auto-route - - eth0 - # 嗅探域名 可选配置 sniffer: enable: false diff --git a/go.mod b/go.mod index bc9fccba..796e0962 100644 --- a/go.mod +++ b/go.mod @@ -5,7 +5,6 @@ go 1.20 require ( github.com/3andne/restls-client-go v0.1.6 github.com/bahlo/generic-list-go v0.2.0 - github.com/cilium/ebpf v0.12.3 github.com/coreos/go-iptables v0.7.0 github.com/dlclark/regexp2 v1.11.4 github.com/go-chi/chi/v5 v5.1.0 @@ -82,6 +81,7 @@ require ( github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38 // indirect github.com/hashicorp/yamux v0.1.1 // indirect github.com/josharian/native v1.1.0 // indirect + github.com/kr/text v0.2.0 // indirect github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 // indirect github.com/mailru/easyjson v0.7.7 // indirect github.com/mdlayher/socket v0.4.1 // indirect diff --git a/go.sum b/go.sum index d5b57053..a3478860 100644 --- a/go.sum +++ b/go.sum @@ -17,12 +17,11 @@ github.com/buger/jsonparser v1.1.1/go.mod h1:6RYKKt7H4d4+iWqouImQ9R2FZql3VbhNgx2 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI= github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI= github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU= -github.com/cilium/ebpf v0.12.3 h1:8ht6F9MquybnY97at+VDZb3eQQr8ev79RueWeVaEcG4= -github.com/cilium/ebpf v0.12.3/go.mod h1:TctK1ivibvI3znr66ljgi4hqOT8EYQjz1KWBfb1UVgM= github.com/cloudflare/circl v1.3.7 h1:qlCDlTPz2n9fu58M0Nh1J/JzcFpfgkFHHX3O35r5vcU= github.com/cloudflare/circl v1.3.7/go.mod h1:sRTcRWXGLrKw6yIGJ+l7amYJFfAXbZG0kBSc8r4zxgA= github.com/coreos/go-iptables v0.7.0 h1:XWM3V+MPRr5/q51NuWSgU0fqMad64Zyxs8ZUoMsamr8= github.com/coreos/go-iptables v0.7.0/go.mod h1:Qe8Bv2Xik5FyTXwgIbLAnv2sWSBmvWdFETJConOQ//Q= +github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E= github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= @@ -37,7 +36,6 @@ github.com/ericlagergren/siv v0.0.0-20220507050439-0b757b3aa5f1 h1:tlDMEdcPRQKBE github.com/ericlagergren/siv v0.0.0-20220507050439-0b757b3aa5f1/go.mod h1:4RfsapbGx2j/vU5xC/5/9qB3kn9Awp1YDiEnN43QrJ4= github.com/ericlagergren/subtle v0.0.0-20220507045147-890d697da010 h1:fuGucgPk5dN6wzfnxl3D0D3rVLw4v2SbBT9jb4VnxzA= github.com/ericlagergren/subtle v0.0.0-20220507045147-890d697da010/go.mod h1:JtBcj7sBuTTRupn7c2bFspMDIObMJsVK8TeUvpShPok= -github.com/frankban/quicktest v1.14.5 h1:dfYrrRyLtiqT9GyKXgdh+k4inNeTvmGbuSgZ3lx3GhA= github.com/fsnotify/fsnotify v1.7.0 h1:8JEhPFa5W2WU7YfeZzPNqzMP6Lwt7L2715Ggo0nosvA= github.com/fsnotify/fsnotify v1.7.0/go.mod h1:40Bi/Hjc2AVfZrqy+aj+yEI+/bRxZnMJyTJwOpGvigM= github.com/gaukas/godicttls v0.0.4 h1:NlRaXb3J6hAnTmWdsEKb9bcSBD6BvcIjdGdeb0zfXbk= @@ -85,8 +83,9 @@ github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2 github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw= github.com/klauspost/cpuid/v2 v2.2.8 h1:+StwCXwm9PdpiEkPyzBXIy+M9KUb4ODm0Zarf1kS5BM= github.com/klauspost/cpuid/v2 v2.2.8/go.mod h1:Lcz8mBdAVJIBVzewtcLocK12l3Y+JytZYpaMropDUws= -github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE= +github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI= github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY= +github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE= github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 h1:6E+4a0GO5zZEnZ81pIr0yLvtUWk2if982qA3F3QD6H4= github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0/go.mod h1:zJYVVT2jmtg6P3p1VtQj7WsuWi/y4VnjVBn7F8KPB3I= github.com/lunixbochs/struc v0.0.0-20200707160740-784aaebc1d40 h1:EnfXoSqDfSNJv0VBNqY/88RNnhSGYkrHaO0mmFGbVsc= @@ -155,7 +154,6 @@ github.com/quic-go/qpack v0.4.0 h1:Cr9BXA1sQS2SmDUWjSofMPNKmvF6IiIfDRmgU0w1ZCo= github.com/quic-go/qpack v0.4.0/go.mod h1:UZVnYIfi5GRk+zI9UMaCPsmZ2xKJP7XBUvVyT1Knj9A= github.com/quic-go/qtls-go1-20 v0.4.1 h1:D33340mCNDAIKBqXuAvexTNMUByrYmFYVfKfDN5nfFs= github.com/quic-go/qtls-go1-20 v0.4.1/go.mod h1:X9Nh97ZL80Z+bX/gUXMbipO6OxdiDi58b/fMC9mAL+k= -github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8= github.com/sagernet/bbolt v0.0.0-20231014093535-ea5cb2fe9f0a h1:+NkI2670SQpQWvkkD2QgdTuzQG263YZ+2emfpeyGqW0= github.com/sagernet/bbolt v0.0.0-20231014093535-ea5cb2fe9f0a/go.mod h1:63s7jpZqcDAIpj8oI/1v4Izok+npJOHACFCU6+huCkM= github.com/sagernet/fswatch v0.1.1 h1:YqID+93B7VRfqIH3PArW/XpJv5H4OLEVWDfProGoRQs= diff --git a/hub/executor/executor.go b/hub/executor/executor.go index 6504e96a..89145241 100644 --- a/hub/executor/executor.go +++ b/hub/executor/executor.go @@ -26,7 +26,6 @@ import ( "github.com/metacubex/mihomo/component/updater" "github.com/metacubex/mihomo/config" C "github.com/metacubex/mihomo/constant" - "github.com/metacubex/mihomo/constant/features" "github.com/metacubex/mihomo/constant/provider" "github.com/metacubex/mihomo/dns" "github.com/metacubex/mihomo/listener" @@ -182,9 +181,6 @@ func updateListeners(general *config.General, listeners map[string]C.InboundList listener.ReCreateHTTP(general.Port, tunnel.Tunnel) listener.ReCreateSocks(general.SocksPort, tunnel.Tunnel) listener.ReCreateRedir(general.RedirPort, tunnel.Tunnel) - if !features.CMFA { - listener.ReCreateAutoRedir(general.EBpf.AutoRedir, tunnel.Tunnel) - } listener.ReCreateTProxy(general.TProxyPort, tunnel.Tunnel) listener.ReCreateMixed(general.MixedPort, tunnel.Tunnel) listener.ReCreateShadowSocks(general.ShadowSocksConfig, tunnel.Tunnel) @@ -352,7 +348,6 @@ func updateTun(general *config.General) { return } listener.ReCreateTun(general.Tun, tunnel.Tunnel) - listener.ReCreateRedirToTun(general.EBpf.RedirectToTun) } func updateSniffer(sniffer *config.Sniffer) { diff --git a/listener/autoredir/tcp.go b/listener/autoredir/tcp.go deleted file mode 100644 index 2b21b087..00000000 --- a/listener/autoredir/tcp.go +++ /dev/null @@ -1,95 +0,0 @@ -package autoredir - -import ( - "net" - "net/netip" - - "github.com/metacubex/mihomo/adapter/inbound" - N "github.com/metacubex/mihomo/common/net" - C "github.com/metacubex/mihomo/constant" - "github.com/metacubex/mihomo/log" - "github.com/metacubex/mihomo/transport/socks5" -) - -type Listener struct { - listener net.Listener - addr string - closed bool - additions []inbound.Addition - lookupFunc func(netip.AddrPort) (socks5.Addr, error) -} - -// RawAddress implements C.Listener -func (l *Listener) RawAddress() string { - return l.addr -} - -// Address implements C.Listener -func (l *Listener) Address() string { - return l.listener.Addr().String() -} - -// Close implements C.Listener -func (l *Listener) Close() error { - l.closed = true - return l.listener.Close() -} - -func (l *Listener) TCPAddr() netip.AddrPort { - return l.listener.Addr().(*net.TCPAddr).AddrPort() -} - -func (l *Listener) SetLookupFunc(lookupFunc func(netip.AddrPort) (socks5.Addr, error)) { - l.lookupFunc = lookupFunc -} - -func (l *Listener) handleRedir(conn net.Conn, tunnel C.Tunnel) { - if l.lookupFunc == nil { - log.Errorln("[Auto Redirect] lookup function is nil") - return - } - - target, err := l.lookupFunc(conn.RemoteAddr().(*net.TCPAddr).AddrPort()) - if err != nil { - log.Warnln("[Auto Redirect] %v", err) - _ = conn.Close() - return - } - - N.TCPKeepAlive(conn) - - tunnel.HandleTCPConn(inbound.NewSocket(target, conn, C.REDIR, l.additions...)) -} - -func New(addr string, tunnel C.Tunnel, additions ...inbound.Addition) (*Listener, error) { - if len(additions) == 0 { - additions = []inbound.Addition{ - inbound.WithInName("DEFAULT-REDIR"), - inbound.WithSpecialRules(""), - } - } - l, err := net.Listen("tcp", addr) - if err != nil { - return nil, err - } - rl := &Listener{ - listener: l, - addr: addr, - additions: additions, - } - - go func() { - for { - c, err := l.Accept() - if err != nil { - if rl.closed { - break - } - continue - } - go rl.handleRedir(c, tunnel) - } - }() - - return rl, nil -} diff --git a/listener/listener.go b/listener/listener.go index 76860e0d..4d106778 100644 --- a/listener/listener.go +++ b/listener/listener.go @@ -9,9 +9,7 @@ import ( "strings" "sync" - "github.com/metacubex/mihomo/component/ebpf" C "github.com/metacubex/mihomo/constant" - "github.com/metacubex/mihomo/listener/autoredir" LC "github.com/metacubex/mihomo/listener/config" "github.com/metacubex/mihomo/listener/http" "github.com/metacubex/mihomo/listener/mixed" @@ -49,9 +47,6 @@ var ( shadowSocksListener C.MultiAddrListener vmessListener *sing_vmess.Listener tuicListener *tuic.Listener - autoRedirListener *autoredir.Listener - autoRedirProgram *ebpf.TcEBpfProgram - tcProgram *ebpf.TcEBpfProgram // lock for recreate function socksMux sync.Mutex @@ -540,95 +535,6 @@ func ReCreateTun(tunConf LC.Tun, tunnel C.Tunnel) { log.Infoln("[TUN] Tun adapter listening at: %s", tunLister.Address()) } -func ReCreateRedirToTun(ifaceNames []string) { - tcMux.Lock() - defer tcMux.Unlock() - - nicArr := ifaceNames - slices.Sort(nicArr) - nicArr = slices.Compact(nicArr) - - if tcProgram != nil { - tcProgram.Close() - tcProgram = nil - } - - if len(nicArr) == 0 { - return - } - - tunConf := GetTunConf() - - if !tunConf.Enable { - return - } - - program, err := ebpf.NewTcEBpfProgram(nicArr, tunConf.Device) - if err != nil { - log.Errorln("Attached tc ebpf program error: %v", err) - return - } - tcProgram = program - - log.Infoln("Attached tc ebpf program to interfaces %v", tcProgram.RawNICs()) -} - -func ReCreateAutoRedir(ifaceNames []string, tunnel C.Tunnel) { - autoRedirMux.Lock() - defer autoRedirMux.Unlock() - - var err error - defer func() { - if err != nil { - if autoRedirListener != nil { - _ = autoRedirListener.Close() - autoRedirListener = nil - } - if autoRedirProgram != nil { - autoRedirProgram.Close() - autoRedirProgram = nil - } - log.Errorln("Start auto redirect server error: %s", err.Error()) - } - }() - - nicArr := ifaceNames - slices.Sort(nicArr) - nicArr = slices.Compact(nicArr) - - if autoRedirListener != nil && autoRedirProgram != nil { - _ = autoRedirListener.Close() - autoRedirProgram.Close() - autoRedirListener = nil - autoRedirProgram = nil - } - - if len(nicArr) == 0 { - return - } - - defaultRouteInterfaceName, err := ebpf.GetAutoDetectInterface() - if err != nil { - return - } - - addr := genAddr("*", C.TcpAutoRedirPort, true) - - autoRedirListener, err = autoredir.New(addr, tunnel) - if err != nil { - return - } - - autoRedirProgram, err = ebpf.NewRedirEBpfProgram(nicArr, autoRedirListener.TCPAddr().Port(), defaultRouteInterfaceName) - if err != nil { - return - } - - autoRedirListener.SetLookupFunc(autoRedirProgram.Lookup) - - log.Infoln("Auto redirect proxy listening at: %s, attached tc ebpf program to interfaces %v", autoRedirListener.Address(), autoRedirProgram.RawNICs()) -} - func PatchTunnel(tunnels []LC.Tunnel, tunnel C.Tunnel) { tunnelMux.Lock() defer tunnelMux.Unlock() diff --git a/test/go.mod b/test/go.mod index 92374886..f364c2c8 100644 --- a/test/go.mod +++ b/test/go.mod @@ -22,7 +22,6 @@ require ( github.com/andybalholm/brotli v1.0.5 // indirect github.com/bahlo/generic-list-go v0.2.0 // indirect github.com/buger/jsonparser v1.1.1 // indirect - github.com/cilium/ebpf v0.12.3 // indirect github.com/coreos/go-iptables v0.7.0 // indirect github.com/davecgh/go-spew v1.1.1 // indirect github.com/distribution/reference v0.5.0 // indirect diff --git a/test/go.sum b/test/go.sum index af34b356..05a23ce9 100644 --- a/test/go.sum +++ b/test/go.sum @@ -19,8 +19,6 @@ github.com/buger/jsonparser v1.1.1/go.mod h1:6RYKKt7H4d4+iWqouImQ9R2FZql3VbhNgx2 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI= github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI= github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU= -github.com/cilium/ebpf v0.12.3 h1:8ht6F9MquybnY97at+VDZb3eQQr8ev79RueWeVaEcG4= -github.com/cilium/ebpf v0.12.3/go.mod h1:TctK1ivibvI3znr66ljgi4hqOT8EYQjz1KWBfb1UVgM= github.com/coreos/go-iptables v0.7.0 h1:XWM3V+MPRr5/q51NuWSgU0fqMad64Zyxs8ZUoMsamr8= github.com/coreos/go-iptables v0.7.0/go.mod h1:Qe8Bv2Xik5FyTXwgIbLAnv2sWSBmvWdFETJConOQ//Q= github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=