/* parseoptions.c -- options handling * Copyright(C) 1999-2001 Salvatore Sanfilippo * Under GPL, see the COPYING file for more information about * the license. */ /* $Id: parseoptions.c,v 1.25 2003/08/08 14:39:00 antirez Exp $ */ #include #include #include #include #include #include #include #include #include #include "antigetopt.h" #include "hping2.h" #include "globals.h" enum { OPT_COUNT, OPT_INTERVAL, OPT_NUMERIC, OPT_QUIET, OPT_INTERFACE, OPT_HELP, OPT_VERSION, OPT_DESTPORT, OPT_BASEPORT, OPT_TTL, OPT_ID, OPT_WIN, OPT_SPOOF, OPT_FIN, OPT_SYN, OPT_RST, OPT_PUSH, OPT_ACK, OPT_URG, OPT_XMAS, OPT_YMAS, OPT_FRAG, OPT_MOREFRAG, OPT_DONTFRAG, OPT_FRAGOFF, OPT_TCPOFF, OPT_REL, OPT_DATA, OPT_RAWIP, OPT_ICMP, OPT_UDP, OPT_BIND, OPT_UNBIND, OPT_DEBUG, OPT_VERBOSE, OPT_WINID, OPT_KEEP, OPT_FILE, OPT_DUMP, OPT_PRINT, OPT_SIGN, OPT_LISTEN, OPT_SAFE, OPT_TRACEROUTE, OPT_TOS, OPT_MTU, OPT_SEQNUM, OPT_BADCKSUM, OPT_SETSEQ, OPT_SETACK, OPT_ICMPTYPE, OPT_ICMPCODE, OPT_END, OPT_RROUTE, OPT_IPPROTO, OPT_ICMP_IPVER, OPT_ICMP_IPHLEN, OPT_ICMP_IPLEN, OPT_ICMP_IPID, OPT_ICMP_IPPROTO, OPT_ICMP_CKSUM, OPT_ICMP_TS, OPT_ICMP_ADDR, OPT_TCPEXITCODE, OPT_FAST, OPT_TR_KEEP_TTL, OPT_TCP_TIMESTAMP, OPT_TR_STOP, OPT_TR_NO_RTT, OPT_ICMP_HELP, OPT_RAND_DEST, OPT_RAND_SOURCE, OPT_LSRR, OPT_SSRR, OPT_ROUTE_HELP, OPT_ICMP_IPSRC, OPT_ICMP_IPDST, OPT_ICMP_SRCPORT, OPT_ICMP_DSTPORT, OPT_ICMP_GW, OPT_FORCE_ICMP, OPT_APD_SEND, OPT_SCAN, OPT_FASTER, OPT_BPS, OPT_PPS, OPT_IPV6, OPT_LHS ,OPT_FLOOD }; static struct ago_optlist hping_optlist[] = { { 'c', "count", OPT_COUNT, AGO_NEEDARG }, { 'i', "interval", OPT_INTERVAL, AGO_NEEDARG|AGO_EXCEPT0 }, { 'n', "numeric", OPT_NUMERIC, AGO_NOARG }, { 'q', "quiet", OPT_QUIET, AGO_NOARG }, { 'I', "interface", OPT_INTERFACE, AGO_NEEDARG }, { 'h', "help", OPT_HELP, AGO_NOARG }, { 'v', "version", OPT_VERSION, AGO_NOARG }, { 'p', "destport", OPT_DESTPORT, AGO_NEEDARG|AGO_EXCEPT0 }, { 's', "baseport", OPT_BASEPORT, AGO_NEEDARG|AGO_EXCEPT0 }, { 't', "ttl", OPT_TTL, AGO_NEEDARG }, { 'N', "id", OPT_ID, AGO_NEEDARG|AGO_EXCEPT0 }, { 'w', "win", OPT_WIN, AGO_NEEDARG|AGO_EXCEPT0 }, { 'a', "spoof", OPT_SPOOF, AGO_NEEDARG|AGO_EXCEPT0 }, { 'F', "fin", OPT_FIN, AGO_NOARG|AGO_EXCEPT0 }, { 'S', "syn", OPT_SYN, AGO_NOARG|AGO_EXCEPT0 }, { 'R', "rst", OPT_RST, AGO_NOARG|AGO_EXCEPT0 }, { 'P', "push", OPT_PUSH, AGO_NOARG|AGO_EXCEPT0 }, { 'A', "ack", OPT_ACK, AGO_NOARG|AGO_EXCEPT0 }, { 'U', "urg", OPT_URG, AGO_NOARG|AGO_EXCEPT0 }, { 'X', "xmas", OPT_XMAS, AGO_NOARG|AGO_EXCEPT0 }, { 'Y', "ymas", OPT_YMAS, AGO_NOARG|AGO_EXCEPT0 }, { 'f', "frag", OPT_FRAG, AGO_NOARG|AGO_EXCEPT0 }, { 'x', "morefrag", OPT_MOREFRAG, AGO_NOARG|AGO_EXCEPT0 }, { 'y', "dontfrag", OPT_DONTFRAG, AGO_NOARG }, { 'g', "fragoff", OPT_FRAGOFF, AGO_NEEDARG|AGO_EXCEPT0 }, { 'O', "tcpoff", OPT_TCPOFF, AGO_NEEDARG|AGO_EXCEPT0 }, { 'r', "rel", OPT_REL, AGO_NOARG }, { 'd', "data", OPT_DATA, AGO_NEEDARG|AGO_EXCEPT0 }, { '0', "rawip", OPT_RAWIP, AGO_NOARG|AGO_EXCEPT0 }, { '1', "icmp", OPT_ICMP, AGO_NOARG }, { '2', "udp", OPT_UDP, AGO_NOARG }, { '8', "scan", OPT_SCAN, AGO_NEEDARG }, { 'z', "bind", OPT_BIND, AGO_NOARG }, { 'Z', "unbind", OPT_UNBIND, AGO_NOARG }, { 'D', "debug", OPT_DEBUG, AGO_NOARG }, { 'V', "verbose", OPT_VERBOSE, AGO_NOARG }, { 'W', "winid", OPT_WINID, AGO_NOARG }, { 'k', "keep", OPT_KEEP, AGO_NOARG }, { 'E', "file", OPT_FILE, AGO_NEEDARG|AGO_EXCEPT0 }, { 'j', "dump", OPT_DUMP, AGO_NOARG|AGO_EXCEPT0 }, { 'J', "print", OPT_PRINT, AGO_NOARG|AGO_EXCEPT0 }, { 'e', "sign", OPT_SIGN, AGO_NEEDARG|AGO_EXCEPT0 }, { '9', "listen", OPT_LISTEN, AGO_NEEDARG|AGO_EXCEPT0 }, { 'B', "safe", OPT_SAFE, AGO_NOARG|AGO_EXCEPT0 }, { 'T', "traceroute", OPT_TRACEROUTE, AGO_NOARG }, { 'o', "tos", OPT_TOS, AGO_NEEDARG }, { 'm', "mtu", OPT_MTU, AGO_NEEDARG|AGO_EXCEPT0 }, { 'Q', "seqnum", OPT_SEQNUM, AGO_NOARG|AGO_EXCEPT0 }, { 'b', "badcksum", OPT_BADCKSUM, AGO_NOARG|AGO_EXCEPT0 }, { 'M', "setseq", OPT_SETSEQ, AGO_NEEDARG|AGO_EXCEPT0 }, { 'L', "setack", OPT_SETACK, AGO_NEEDARG|AGO_EXCEPT0 }, { 'C', "icmptype", OPT_ICMPTYPE, AGO_NEEDARG|AGO_EXCEPT0 }, { 'K', "icmpcode", OPT_ICMPCODE, AGO_NEEDARG|AGO_EXCEPT0 }, { 'u', "end", OPT_END, AGO_NOARG|AGO_EXCEPT0 }, { 'G', "rroute", OPT_RROUTE, AGO_NOARG }, { 'H', "ipproto", OPT_IPPROTO, AGO_NEEDARG|AGO_EXCEPT0 }, { '\0', "icmp-help", OPT_ICMP_HELP, AGO_NOARG }, { '\0', "icmp-ipver", OPT_ICMP_IPVER, AGO_NEEDARG|AGO_EXCEPT0 }, { '\0', "icmp-iphlen", OPT_ICMP_IPHLEN, AGO_NEEDARG|AGO_EXCEPT0 }, { '\0', "icmp-iplen", OPT_ICMP_IPLEN, AGO_NEEDARG|AGO_EXCEPT0 }, { '\0', "icmp-ipid", OPT_ICMP_IPID, AGO_NEEDARG|AGO_EXCEPT0 }, { '\0', "icmp-ipproto", OPT_ICMP_IPPROTO, AGO_NEEDARG|AGO_EXCEPT0 }, { '\0', "icmp-cksum", OPT_ICMP_CKSUM, AGO_NEEDARG|AGO_EXCEPT0 }, { '\0', "icmp-ts", OPT_ICMP_TS, AGO_NOARG }, { '\0', "icmp-addr", OPT_ICMP_ADDR, AGO_NOARG }, { '\0', "tcpexitcode", OPT_TCPEXITCODE, AGO_NOARG }, { '\0', "fast", OPT_FAST, AGO_NOARG|AGO_EXCEPT0 }, { '\0', "faster", OPT_FASTER, AGO_NOARG|AGO_EXCEPT0 }, { '\0', "tr-keep-ttl", OPT_TR_KEEP_TTL, AGO_NOARG }, { '\0', "tcp-timestamp",OPT_TCP_TIMESTAMP, AGO_NOARG }, { '\0', "tr-stop", OPT_TR_STOP, AGO_NOARG }, { '\0', "tr-no-rtt", OPT_TR_NO_RTT, AGO_NOARG }, { '\0', "rand-dest", OPT_RAND_DEST, AGO_NOARG }, { '\0', "rand-source", OPT_RAND_SOURCE, AGO_NOARG }, { '\0', "lsrr", OPT_LSRR, AGO_NEEDARG|AGO_EXCEPT0 }, { '\0', "ssrr", OPT_SSRR, AGO_NEEDARG|AGO_EXCEPT0 }, { '\0', "route-help", OPT_ROUTE_HELP, AGO_NOARG }, { '\0', "apd-send", OPT_APD_SEND, AGO_NEEDARG }, { '\0', "icmp-ipsrc", OPT_ICMP_IPSRC, AGO_NEEDARG|AGO_EXCEPT0 }, { '\0', "icmp-ipdst", OPT_ICMP_IPDST, AGO_NEEDARG|AGO_EXCEPT0 }, { '\0', "icmp-gw", OPT_ICMP_GW, AGO_NEEDARG|AGO_EXCEPT0 }, { '\0', "icmp-srcport", OPT_ICMP_SRCPORT, AGO_NEEDARG|AGO_EXCEPT0 }, { '\0', "icmp-dstport", OPT_ICMP_DSTPORT, AGO_NEEDARG|AGO_EXCEPT0 }, { '\0', "force-icmp", OPT_FORCE_ICMP, AGO_NOARG }, { '\0', "bps", OPT_BPS, AGO_NEEDARG }, { '\0', "pps", OPT_PPS, AGO_NEEDARG }, { '6', "ipv6", OPT_IPV6, AGO_NOARG }, { '\0', "lhs", OPT_LHS, AGO_NEEDARG }, { '\0', "flood", OPT_FLOOD, AGO_NOARG }, AGO_LIST_TERM }; /* The following var is turned to 1 if the -i option is used. * This allows to assign a different delay default value if * the scanning mode is selected. */ static int delay_changed = 0; static int suidtester(void) { return (getuid() != geteuid()); } void fail_parse_route(void) { fprintf(stderr, "RECTUM\n"); exit(1); } void parse_route(unsigned char *route, unsigned int *route_len, char *str) { struct in_addr ip; unsigned int i = 0; unsigned int j; unsigned int n = 0; unsigned int route_ptr = 256; char c; route += 3; while (str[i] != '\0') { for (j = i; isalnum(str[j]) || str[j] == '.'; j++); switch(c = str[j]) { case '\0': case '/': if (n >= 62) { fprintf(stderr, "too long route\n"); fail_parse_route(); } str[j] = '\0'; if (inet_aton(str+i, &ip)) { memcpy(route+4*n, &ip.s_addr, 4); n++; if (c == '/') str[j++] = '/'; break; } fprintf(stderr, "invalid IP adress in route\n"); fail_parse_route(); case ':': if ((!i) && j && j < 4) { sscanf(str, "%u:%n", &route_ptr, &i); if (i == ++j) { if (route_ptr < 256) break; } } default: fail_parse_route(); } i = j; } if (route_ptr == 256) route[-1] = (unsigned char) ( n ? 8 : 4 ); else route[-1] = (unsigned char) route_ptr; *route_len = 4*n + 3; route[-2] = (unsigned char) *route_len; } int parse_options(int argc, char **argv) { int src_ttl_set = 0; int targethost_set = 0; int o; char *mult; int typeset = 0; if (argc < 2) return -1; ago_set_exception(0, suidtester, "Option disabled when setuid"); while ((o = antigetopt(argc, argv, hping_optlist)) != AGO_EOF) { switch(o) { case AGO_UNKNOWN: case AGO_REQARG: case AGO_AMBIG: ago_gnu_error("hping", o); fprintf(stderr, "Try hping --help\n"); exit(1); case AGO_ALONE: if (targethost_set == 1) { fprintf(stderr, "hping: you must specify only " "one target host at a time\n"); exit(1); } else { strlcpy(targetname, ago_optarg, 1024); targethost_set = 1; } break; case OPT_COUNT: count = strtol(ago_optarg, NULL, 0); break; case OPT_INTERVAL: delay_changed = 1; if (*ago_optarg == 'u') { opt_waitinusec = TRUE; usec_delay.it_value.tv_sec = usec_delay.it_interval.tv_sec = 0; usec_delay.it_value.tv_usec = usec_delay.it_interval.tv_usec = atol(ago_optarg+1); } else sending_wait = strtol(ago_optarg, NULL, 0); break; case OPT_NUMERIC: opt_numeric = TRUE; break; case OPT_QUIET: opt_quiet = TRUE; break; case OPT_INTERFACE: strlcpy (ifname, ago_optarg, 1024); break; case OPT_HELP: show_usage(); break; case OPT_VERSION: show_version(); break; case OPT_DESTPORT: if (*ago_optarg == '+') { opt_incdport = TRUE; ago_optarg++; } if (*ago_optarg == '+') { opt_force_incdport = TRUE; ago_optarg++; } base_dst_port = dst_port = strtol(ago_optarg, NULL, 0); break; case OPT_BASEPORT: initsport = strtol(ago_optarg, NULL, 0); break; case OPT_TTL: src_ttl = strtol(ago_optarg, NULL, 0); src_ttl_set = 1; break; case OPT_ID: src_id = strtol(ago_optarg, NULL, 0); break; case OPT_WIN: src_winsize = strtol(ago_optarg, NULL, 0); break; case OPT_SPOOF: strlcpy (spoofaddr, ago_optarg, 1024); break; case OPT_FIN: tcp_th_flags |= TH_FIN; break; case OPT_SYN: tcp_th_flags |= TH_SYN; break; case OPT_RST: tcp_th_flags |= TH_RST; break; case OPT_PUSH: tcp_th_flags |= TH_PUSH; break; case OPT_ACK: tcp_th_flags |= TH_ACK; break; case OPT_URG: tcp_th_flags |= TH_URG; break; case OPT_XMAS: tcp_th_flags |= TH_X; break; case OPT_YMAS: tcp_th_flags |= TH_Y; break; case OPT_FRAG: opt_fragment = TRUE; break; case OPT_MOREFRAG: opt_mf = TRUE; break; case OPT_DONTFRAG: opt_df = TRUE; break; case OPT_FRAGOFF: ip_frag_offset = strtol(ago_optarg, NULL, 0); break; case OPT_TCPOFF: src_thoff = strtol(ago_optarg, NULL, 0); break; case OPT_REL: opt_relid = TRUE; break; case OPT_DATA: data_size = strtol(ago_optarg, NULL, 0); break; case OPT_RAWIP: opt_rawipmode = TRUE; break; case OPT_ICMP: opt_icmpmode = TRUE; break; case OPT_ICMP_TS: opt_icmpmode = TRUE; opt_icmptype = 13; break; case OPT_ICMP_ADDR: opt_icmpmode = TRUE; opt_icmptype = 17; break; case OPT_UDP: opt_udpmode = TRUE; break; case OPT_SCAN: opt_scanmode = TRUE; opt_scanports = strdup(ago_optarg); break; case OPT_LISTEN: opt_listenmode = TRUE; strlcpy(sign, ago_optarg, 1024); signlen = strlen(ago_optarg); break; case OPT_IPPROTO: raw_ip_protocol = strtol(ago_optarg, NULL, 0); break; case OPT_ICMPTYPE: opt_icmpmode= TRUE; opt_icmptype = strtol(ago_optarg, NULL, 0); typeset = 1; break; case OPT_ICMPCODE: opt_icmpmode= TRUE; opt_icmpcode = strtol(ago_optarg, NULL, 0); break; case OPT_BIND: ctrlzbind = BIND_TTL; break; case OPT_UNBIND: ctrlzbind = BIND_NONE; break; case OPT_DEBUG: opt_debug = TRUE; break; case OPT_VERBOSE: opt_verbose = TRUE; break; case OPT_WINID: opt_winid_order = TRUE; break; case OPT_KEEP: opt_keepstill = TRUE; break; case OPT_FILE: opt_datafromfile = TRUE; strlcpy(datafilename, ago_optarg, 1024); break; case OPT_DUMP: opt_hexdump = TRUE; break; case OPT_PRINT: opt_contdump = TRUE; break; case OPT_SIGN: opt_sign = TRUE; strlcpy(sign, ago_optarg, 1024); signlen = strlen(ago_optarg); break; case OPT_SAFE: opt_safe = TRUE; break; case OPT_END: opt_end = TRUE; break; case OPT_TRACEROUTE: opt_traceroute = TRUE; break; case OPT_TOS: if (!strcmp(ago_optarg, "help")) tos_help(); else { static unsigned int tos_tmp = 0; sscanf(ago_optarg, "%2x", &tos_tmp); ip_tos |= tos_tmp; /* OR tos */ } break; case OPT_MTU: virtual_mtu = strtol(ago_optarg, NULL, 0); opt_fragment = TRUE; if(virtual_mtu > 65535) { virtual_mtu = 65535; printf("Specified MTU too high, " "fixed to 65535.\n"); } break; case OPT_SEQNUM: opt_seqnum = TRUE; break; case OPT_BADCKSUM: opt_badcksum = TRUE; break; case OPT_SETSEQ: set_seqnum = TRUE; tcp_seqnum = strtoul(ago_optarg, NULL, 0); break; case OPT_SETACK: set_ack = TRUE; tcp_ack = strtoul(ago_optarg, NULL, 0); break; case OPT_RROUTE: opt_rroute = TRUE; break; case OPT_ICMP_HELP: icmp_help(); /* ICMP options help */ break; case OPT_ICMP_IPVER: icmp_ip_version = strtol(ago_optarg, NULL, 0); break; case OPT_ICMP_IPHLEN: icmp_ip_ihl = strtol(ago_optarg, NULL, 0); break; case OPT_ICMP_IPLEN: icmp_ip_tot_len = strtol(ago_optarg, NULL, 0); break; case OPT_ICMP_IPID: icmp_ip_id = strtol(ago_optarg, NULL, 0); break; case OPT_ICMP_IPPROTO: icmp_ip_protocol = strtol(ago_optarg, NULL, 0); break; case OPT_ICMP_IPSRC: strlcpy (icmp_ip_srcip, ago_optarg, 1024); break; case OPT_ICMP_IPDST: strlcpy (icmp_ip_dstip, ago_optarg, 1024); break; case OPT_ICMP_GW: strlcpy (icmp_gwip, ago_optarg, 1024); break; case OPT_ICMP_SRCPORT: icmp_ip_srcport = strtol(ago_optarg, NULL, 0); break; case OPT_ICMP_DSTPORT: icmp_ip_dstport = strtol(ago_optarg, NULL, 0); break; case OPT_FORCE_ICMP: opt_force_icmp = TRUE; break; case OPT_ICMP_CKSUM: icmp_cksum = strtol(ago_optarg, NULL, 0); break; case OPT_TCPEXITCODE: opt_tcpexitcode = TRUE; break; case OPT_FAST: delay_changed = 1; opt_waitinusec = TRUE; usec_delay.it_value.tv_sec = usec_delay.it_interval.tv_sec = 0; usec_delay.it_value.tv_usec = usec_delay.it_interval.tv_usec = 100000; break; case OPT_FASTER: delay_changed = 1; opt_waitinusec = TRUE; usec_delay.it_value.tv_sec = usec_delay.it_interval.tv_sec = 0; usec_delay.it_value.tv_usec = usec_delay.it_interval.tv_usec = 1; case OPT_TR_KEEP_TTL: opt_tr_keep_ttl = TRUE; break; case OPT_TCP_TIMESTAMP: opt_tcp_timestamp = TRUE; break; case OPT_TR_STOP: opt_tr_stop = TRUE; break; case OPT_TR_NO_RTT: opt_tr_no_rtt = TRUE; break; case OPT_RAND_DEST: opt_rand_dest = TRUE; break; case OPT_RAND_SOURCE: opt_rand_source = TRUE; break; case OPT_LSRR: opt_lsrr = TRUE; parse_route(lsr, &lsr_length, ago_optarg); if (lsr[0]) printf("Warning: erasing previously given " "loose source route"); lsr[0] = 131; break; case OPT_SSRR: opt_ssrr = TRUE; parse_route(ssr, &ssr_length, ago_optarg); if (ssr[0]) printf("Warning: erasing previously given " "strong source route"); ssr[0] = 137; break; case OPT_ROUTE_HELP: route_help(); break; case OPT_APD_SEND: hping_ars_send(ago_optarg); break; case OPT_FLOOD: opt_flood = TRUE; break; case OPT_BPS: opt_bps = strtol(ago_optarg, &mult, 0); switch(*mult) { case 'k': case 'K': opt_bps *= 1000; break; case 'm': case 'M': opt_bps *= 1000000; break; case 'g': case 'G': opt_bps *= 1000000000; break; case 0: break; default: printf("invalid character in --bps argument: `%c'\n", *mult); exit(1); } opt_bps /= 8; break; case OPT_PPS: opt_pps = strtol(ago_optarg, &mult, 0); switch(*mult) { case 'k': case 'K': opt_pps *= 1000; break; case 'm': case 'M': opt_pps *= 1000000; break; case 'g': case 'G': opt_bps *= 1000000000; break; case 0: break; default: printf("invalid character in --pps argument: `%c'\n", *mult); exit(1); } break; case OPT_IPV6: opt_ipv6 = TRUE; opt_af = AF_INET6; break; case OPT_LHS: linkhdr_size = atoi(ago_optarg); break; } } if(typeset == 0 && opt_icmptype == DEFAULT_ICMP_TYPE && opt_ipv6 == 1) opt_icmptype = ICMP6_ECHO; /* missing target host? */ if (targethost_set == 0 && opt_listenmode && opt_safe) { printf( "you must specify a target host if you require safe protocol\n" "because hping needs a target for HCMP packets\n"); exit(1); } if (targethost_set == 0 && !opt_listenmode) return -1; if (opt_numeric == TRUE) opt_gethost = FALSE; /* some error condition */ if (data_size+IPHDR_SIZE+TCPHDR_SIZE > 65535) { printf("Option error: sorry, data size must be <= %lu\n", (unsigned long)(65535-IPHDR_SIZE+TCPHDR_SIZE)); exit(1); } else if (count <= 0 && count != -1) { printf("Option error: count must > 0\n"); exit(1); } else if (sending_wait < 0) { printf("Option error: bad timing interval\n"); exit(1); } else if (opt_waitinusec == TRUE && usec_delay.it_value.tv_usec < 0) { printf("Option error: bad timing interval\n"); exit(1); } else if (opt_datafromfile == TRUE && data_size == 0) { printf("Option error: -E option useless without -d\n"); exit(1); } else if (opt_sign && data_size && signlen > data_size) { printf( "Option error: signature (%d bytes) is larger than data size\n" "check -d option, don't specify -d to let hping compute it\n", signlen); exit(1); } else if ((opt_sign || opt_listenmode) && signlen > 1024) { printf("Option error: signature too big\n"); exit(1); } else if (opt_safe == TRUE && src_id != -1) { printf("Option error: sorry, you can't set id and " "use safe protocol at some time\n"); exit(1); } else if (opt_safe == TRUE && opt_datafromfile == FALSE && opt_listenmode == FALSE) { printf("Option error: sorry, safe protocol is useless " "without 'data from file' option\n"); exit(1); } else if (opt_safe == TRUE && opt_sign == FALSE && opt_listenmode == FALSE) { printf("Option error: sorry, safe protocol require you " "sign your packets, see --sign | -e option\n"); exit(1); } else if (opt_rand_dest == TRUE && ifname[0] == '\0') { printf("Option error: you need to specify an interface " "when the --rand-dest option is enabled\n"); exit(1); } /* dependences */ if (opt_safe == TRUE) src_id = 1; if (opt_traceroute == TRUE && ctrlzbind == BIND_DPORT) ctrlzbind = BIND_TTL; if (opt_traceroute == TRUE && src_ttl_set == 0) src_ttl = DEFAULT_TRACEROUTE_TTL; /* set the data size to the signature len if the no data size * was specified */ if (opt_sign && !data_size) data_size = signlen; /* If scan mode is on, and the -i option was not used, * set the default delay to zero, that's send packets * as fast as possible. */ if (opt_scanmode && !delay_changed) { opt_waitinusec = TRUE; usec_delay.it_value.tv_sec = usec_delay.it_interval.tv_sec = 0; usec_delay.it_value.tv_usec = usec_delay.it_interval.tv_usec = 0; } return 1; }