2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
23 static const char copyright[] =
24 "@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000\n\
25 The Regents of the University of California. All rights reserved.\n";
35 #include <sys/types.h>
36 #include <sys/select.h>
42 static void countme(u_char *, const struct pcap_pkthdr *, const u_char *);
43 static void usage(void) __attribute__((noreturn));
44 static void error(const char *, ...);
45 static void warning(const char *, ...);
46 static char *copy_argv(char **);
55 main(int argc, char **argv)
58 bpf_u_int32 localnet, netmask;
59 register char *cp, *cmdbuf, *device;
60 struct bpf_program fcode;
61 char ebuf[PCAP_ERRBUF_SIZE];
66 if ((cp = strrchr(argv[0], '/')) != NULL)
67 program_name = cp + 1;
69 program_name = argv[0];
72 while ((op = getopt(argc, argv, "i:")) != -1) {
86 device = pcap_lookupdev(ebuf);
91 pd = pcap_open_live(device, 65535, 0, 1000, ebuf);
96 if (pcap_lookupnet(device, &localnet, &netmask, ebuf) < 0) {
101 cmdbuf = copy_argv(&argv[optind]);
103 if (pcap_compile(pd, &fcode, cmdbuf, 1, netmask) < 0)
104 error("%s", pcap_geterr(pd));
106 if (pcap_setfilter(pd, &fcode) < 0)
107 error("%s", pcap_geterr(pd));
108 if (pcap_setnonblock(pd, 1, ebuf) == -1)
109 error("pcap_setnonblock failed: %s", ebuf);
110 printf("Listening on %s\n", device);
113 status = pcap_dispatch(pd, -1, countme,
114 (u_char *)&packet_count);
118 printf("%d packets seen, %d packets counted after pcap_dispatch returns\n",
119 status, packet_count);
124 * We got interrupted, so perhaps we didn't
125 * manage to finish a line we were printing.
126 * Print an extra newline, just in case.
130 (void)fflush(stdout);
135 (void)fprintf(stderr, "%s: pcap_loop: %s\n",
136 program_name, pcap_geterr(pd));
139 exit(status == -1 ? 1 : 0);
143 countme(u_char *user, const struct pcap_pkthdr *h, const u_char *sp)
145 int *counterp = (int *)user;
153 (void)fprintf(stderr, "Usage: %s [ -sptn ] [ -i interface ] [expression]\n",
160 error(const char *fmt, ...)
164 (void)fprintf(stderr, "%s: ", program_name);
166 (void)vfprintf(stderr, fmt, ap);
171 (void)fputc('\n', stderr);
179 warning(const char *fmt, ...)
183 (void)fprintf(stderr, "%s: WARNING: ", program_name);
185 (void)vfprintf(stderr, fmt, ap);
190 (void)fputc('\n', stderr);
195 * Copy arg vector into a new buffer, concatenating arguments with spaces.
198 copy_argv(register char **argv)
201 register u_int len = 0;
210 len += strlen(*p++) + 1;
212 buf = (char *)malloc(len);
214 error("copy_argv: malloc");
218 while ((src = *p++) != NULL) {
219 while ((*dst++ = *src++) != '\0')