76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
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/*
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* $smu-mark$
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* $name: libpcap_stuff.c$
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* $author: Salvatore Sanfilippo <antirez@invece.org>$
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* $copyright: Copyright (C) 1999 by Salvatore Sanfilippo$
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* $license: This software is under GPL version 2 of license$
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* $date: Fri Nov 5 11:55:48 MET 1999$
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* $rev: 8$
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*/
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#include "hping2.h"
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/* This is not be compiled if the target is linux without libpcap */
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#if (!defined OSTYPE_LINUX) || (defined FORCE_LIBPCAP)
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <pcap.h>
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#include <net/bpf.h>
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#include "globals.h"
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int open_pcap()
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{
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int on;
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on = 1; /* no warning if BIOCIMMEDIATE will not be compiled */
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if (opt_debug)
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printf("DEBUG: pcap_open_live(%s, 99999, 0, 1, %p)\n",
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ifname, errbuf);
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pcapfp = pcap_open_live(ifname, 99999, 0, 1, errbuf);
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if (pcapfp == NULL) {
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printf("[open_pcap] pcap_open_live: %s\n", errbuf);
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return -1;
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}
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#if (!defined OSTYPE_LINUX) && (!defined __sun__)
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/* Return the packets to userspace as fast as possible */
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if (ioctl(pcap_fileno(pcapfp), BIOCIMMEDIATE, &on) == -1)
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perror("[open_pcap] ioctl(... BIOCIMMEDIATE ...)");
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#endif
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return 0;
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}
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int close_pcap()
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{
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pcap_close(pcapfp);
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return 0;
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}
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int pcap_recv(char *packet, unsigned int size)
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{
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char *p = NULL;
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int pcapsize;
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if (opt_debug)
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printf("DEBUG: under pcap_recv()\n");
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while(p == NULL) {
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p = (unsigned char*) pcap_next(pcapfp, &hdr);
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if (p == NULL && opt_debug)
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printf("DEBUG: [pcap_recv] p = NULL\n");
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}
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pcapsize = hdr.caplen;
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if (pcapsize < size)
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size = pcapsize;
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memcpy(packet, p, pcapsize);
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return pcapsize;
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}
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#endif /* ! OSTYPE_LINUX || FORCE_LIBPCAP */
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