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.
25 static const char copyright[] _U_ =
26 "@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000\n\
27 The Regents of the University of California. All rights reserved.\n";
41 #include <sys/types.h>
45 #include "pcap/funcattrs.h"
48 #include "portability.h"
51 static char *program_name;
54 static void countme(u_char *, const struct pcap_pkthdr *, const u_char *);
55 static void PCAP_NORETURN usage(void);
56 static void PCAP_NORETURN error(const char *, ...) PCAP_PRINTFLIKE(1, 2);
57 static void warning(const char *, ...) PCAP_PRINTFLIKE(1, 2);
58 static char *copy_argv(char **);
63 main(int argc, char **argv)
66 register char *cp, *cmdbuf, *device;
73 bpf_u_int32 localnet, netmask;
74 struct bpf_program fcode;
75 char ebuf[PCAP_ERRBUF_SIZE];
80 if ((cp = strrchr(argv[0], '/')) != NULL)
81 program_name = cp + 1;
83 program_name = argv[0];
86 while ((op = getopt(argc, argv, "i:mnt:")) != -1) {
102 longarg = strtol(optarg, &p, 10);
103 if (p == optarg || *p != '\0') {
104 error("Timeout value \"%s\" is not a number",
109 error("Timeout value %ld is negative", longarg);
112 if (longarg > INT_MAX) {
113 error("Timeout value %ld is too large (> %d)",
117 timeout = (int)longarg;
126 if (device == NULL) {
127 if (pcap_findalldevs(&devlist, ebuf) == -1)
130 error("no interfaces available for capture");
131 device = strdup(devlist->name);
132 pcap_freealldevs(devlist);
135 pd = pcap_create(device, ebuf);
138 status = pcap_set_snaplen(pd, 65535);
140 error("%s: pcap_set_snaplen failed: %s",
141 device, pcap_statustostr(status));
143 status = pcap_set_immediate_mode(pd, 1);
145 error("%s: pcap_set_immediate_mode failed: %s",
146 device, pcap_statustostr(status));
148 status = pcap_set_timeout(pd, timeout);
150 error("%s: pcap_set_timeout failed: %s",
151 device, pcap_statustostr(status));
152 status = pcap_activate(pd);
155 * pcap_activate() failed.
157 error("%s: %s\n(%s)", device,
158 pcap_statustostr(status), pcap_geterr(pd));
159 } else if (status > 0) {
161 * pcap_activate() succeeded, but it's warning us
162 * of a problem it had.
164 warning("%s: %s\n(%s)", device,
165 pcap_statustostr(status), pcap_geterr(pd));
167 if (pcap_lookupnet(device, &localnet, &netmask, ebuf) < 0) {
172 cmdbuf = copy_argv(&argv[optind]);
174 if (pcap_compile(pd, &fcode, cmdbuf, 1, netmask) < 0)
175 error("%s", pcap_geterr(pd));
177 if (pcap_setfilter(pd, &fcode) < 0)
178 error("%s", pcap_geterr(pd));
179 if (pcap_setnonblock(pd, nonblock, ebuf) == -1)
180 error("pcap_setnonblock failed: %s", ebuf);
181 printf("Listening on %s\n", device);
184 status = pcap_dispatch(pd, -1, countme,
185 (u_char *)&packet_count);
189 printf("%d packets seen, %d packets counted after pcap_dispatch returns\n",
190 status, packet_count);
195 * We got interrupted, so perhaps we didn't
196 * manage to finish a line we were printing.
197 * Print an extra newline, just in case.
201 (void)fflush(stdout);
206 (void)fprintf(stderr, "%s: pcap_loop: %s\n",
207 program_name, pcap_geterr(pd));
210 pcap_freecode(&fcode);
212 exit(status == -1 ? 1 : 0);
216 countme(u_char *user, const struct pcap_pkthdr *h _U_, const u_char *sp _U_)
218 int *counterp = (int *)user;
226 (void)fprintf(stderr, "Usage: %s [ -mn ] [ -i interface ] [ -t timeout] [expression]\n",
233 error(const char *fmt, ...)
237 (void)fprintf(stderr, "%s: ", program_name);
239 (void)vfprintf(stderr, fmt, ap);
244 (void)fputc('\n', stderr);
252 warning(const char *fmt, ...)
256 (void)fprintf(stderr, "%s: WARNING: ", program_name);
258 (void)vfprintf(stderr, fmt, ap);
263 (void)fputc('\n', stderr);
268 * Copy arg vector into a new buffer, concatenating arguments with spaces.
271 copy_argv(register char **argv)
274 register u_int len = 0;
283 len += strlen(*p++) + 1;
285 buf = (char *)malloc(len);
287 error("copy_argv: malloc");
291 while ((src = *p++) != NULL) {
292 while ((*dst++ = *src++) != '\0')