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>
41 static char *program_name;
44 static void countme(u_char *, const struct pcap_pkthdr *, const u_char *);
45 static void usage(void) __attribute__((noreturn));
46 static void error(const char *, ...);
47 static void warning(const char *, ...);
48 static char *copy_argv(char **);
57 main(int argc, char **argv)
60 register char *cp, *cmdbuf, *device;
66 bpf_u_int32 localnet, netmask;
67 struct bpf_program fcode;
68 char ebuf[PCAP_ERRBUF_SIZE];
73 if ((cp = strrchr(argv[0], '/')) != NULL)
74 program_name = cp + 1;
76 program_name = argv[0];
79 while ((op = getopt(argc, argv, "i:mnt:")) != -1) {
95 longarg = strtol(optarg, &p, 10);
96 if (p == optarg || *p != '\0') {
97 error("Timeout value \"%s\" is not a number",
102 error("Timeout value %ld is negative", longarg);
105 if (longarg > INT_MAX) {
106 error("Timeout value %ld is too large (> %d)",
110 timeout = (int)longarg;
119 if (device == NULL) {
120 device = pcap_lookupdev(ebuf);
125 pd = pcap_create(device, ebuf);
128 status = pcap_set_snaplen(pd, 65535);
130 error("%s: pcap_set_snaplen failed: %s",
131 device, pcap_statustostr(status));
133 status = pcap_set_immediate_mode(pd, 1);
135 error("%s: pcap_set_immediate_mode failed: %s",
136 device, pcap_statustostr(status));
138 status = pcap_set_timeout(pd, timeout);
140 error("%s: pcap_set_timeout failed: %s",
141 device, pcap_statustostr(status));
142 status = pcap_activate(pd);
145 * pcap_activate() failed.
147 error("%s: %s\n(%s)", device,
148 pcap_statustostr(status), pcap_geterr(pd));
149 } else if (status > 0) {
151 * pcap_activate() succeeded, but it's warning us
152 * of a problem it had.
154 warning("%s: %s\n(%s)", device,
155 pcap_statustostr(status), pcap_geterr(pd));
157 if (pcap_lookupnet(device, &localnet, &netmask, ebuf) < 0) {
162 cmdbuf = copy_argv(&argv[optind]);
164 if (pcap_compile(pd, &fcode, cmdbuf, 1, netmask) < 0)
165 error("%s", pcap_geterr(pd));
167 if (pcap_setfilter(pd, &fcode) < 0)
168 error("%s", pcap_geterr(pd));
169 if (pcap_setnonblock(pd, nonblock, ebuf) == -1)
170 error("pcap_setnonblock failed: %s", ebuf);
171 printf("Listening on %s\n", device);
174 status = pcap_dispatch(pd, -1, countme,
175 (u_char *)&packet_count);
179 printf("%d packets seen, %d packets counted after pcap_dispatch returns\n",
180 status, packet_count);
185 * We got interrupted, so perhaps we didn't
186 * manage to finish a line we were printing.
187 * Print an extra newline, just in case.
191 (void)fflush(stdout);
196 (void)fprintf(stderr, "%s: pcap_loop: %s\n",
197 program_name, pcap_geterr(pd));
200 exit(status == -1 ? 1 : 0);
204 countme(u_char *user, const struct pcap_pkthdr *h, const u_char *sp)
206 int *counterp = (int *)user;
214 (void)fprintf(stderr, "Usage: %s [ -mn ] [ -i interface ] [ -t timeout] [expression]\n",
221 error(const char *fmt, ...)
225 (void)fprintf(stderr, "%s: ", program_name);
227 (void)vfprintf(stderr, fmt, ap);
232 (void)fputc('\n', stderr);
240 warning(const char *fmt, ...)
244 (void)fprintf(stderr, "%s: WARNING: ", program_name);
246 (void)vfprintf(stderr, fmt, ap);
251 (void)fputc('\n', stderr);
256 * Copy arg vector into a new buffer, concatenating arguments with spaces.
259 copy_argv(register char **argv)
262 register u_int len = 0;
271 len += strlen(*p++) + 1;
273 buf = (char *)malloc(len);
275 error("copy_argv: malloc");
279 while ((src = *p++) != NULL) {
280 while ((*dst++ = *src++) != '\0')