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";
51 #include <sys/socket.h>
52 #include <arpa/inet.h>
54 #include <sys/types.h>
57 #include "pcap/funcattrs.h"
61 * We have pcap_set_optimizer_debug() and pcap_set_print_dot_graph() in
62 * libpcap; declare them (they're not declared by any libpcap header,
63 * because they're special hacks, only available if libpcap was configured
64 * to include them, and only intended for use by libpcap developers trying
65 * to debug the optimizer for filter expressions).
67 PCAP_API void pcap_set_optimizer_debug(int);
68 PCAP_API void pcap_set_print_dot_graph(int);
71 static char *program_name;
74 static void PCAP_NORETURN usage(void);
75 static void PCAP_NORETURN error(const char *, ...) PCAP_PRINTFLIKE(1, 2);
76 static void warn(const char *, ...) PCAP_PRINTFLIKE(1, 2);
79 * On Windows, we need to open the file in binary mode, so that
80 * we get all the bytes specified by the size we get from "fstat()".
81 * On UNIX, that's not necessary. O_BINARY is defined on Windows;
82 * we define it as 0 if it's not defined, so it does nothing.
89 read_infile(char *fname)
91 register int i, fd, cc;
95 fd = open(fname, O_RDONLY|O_BINARY);
97 error("can't open %s: %s", fname, pcap_strerror(errno));
99 if (fstat(fd, &buf) < 0)
100 error("can't stat %s: %s", fname, pcap_strerror(errno));
102 cp = malloc((u_int)buf.st_size + 1);
104 error("malloc(%d) for %s: %s", (u_int)buf.st_size + 1,
105 fname, pcap_strerror(errno));
106 cc = read(fd, cp, (u_int)buf.st_size);
108 error("read %s: %s", fname, pcap_strerror(errno));
109 if (cc != buf.st_size)
110 error("short read %s (%d != %d)", fname, cc, (int)buf.st_size);
113 /* replace "# comment" with spaces */
114 for (i = 0; i < cc; i++) {
116 while (i < cc && cp[i] != '\n')
125 error(const char *fmt, ...)
129 (void)fprintf(stderr, "%s: ", program_name);
131 (void)vfprintf(stderr, fmt, ap);
136 (void)fputc('\n', stderr);
144 warn(const char *fmt, ...)
148 (void)fprintf(stderr, "%s: WARNING: ", program_name);
150 (void)vfprintf(stderr, fmt, ap);
155 (void)fputc('\n', stderr);
160 * Copy arg vector into a new buffer, concatenating arguments with spaces.
163 copy_argv(register char **argv)
166 register u_int len = 0;
175 len += strlen(*p++) + 1;
177 buf = (char *)malloc(len);
179 error("copy_argv: malloc");
183 while ((src = *p++) != NULL) {
184 while ((*dst++ = *src++) != '\0')
194 main(int argc, char **argv)
206 bpf_u_int32 netmask = PCAP_NETMASK_UNKNOWN;
209 struct bpf_program fcode;
212 if (pcap_wsockinit() != 0)
223 if ((cp = strrchr(argv[0], '/')) != NULL)
224 program_name = cp + 1;
226 program_name = argv[0];
229 while ((op = getopt(argc, argv, "dF:gm:Os:")) != -1) {
240 error("libpcap and filtertest not built with optimizer debugging enabled");
255 switch (inet_pton(AF_INET, optarg, &addr)) {
258 error("invalid netmask %s", optarg);
262 error("invalid netmask %s: %s", optarg,
263 pcap_strerror(errno));
276 snaplen = strtol(optarg, &end, 0);
277 if (optarg == end || *end != '\0'
278 || snaplen < 0 || snaplen > 65535)
279 error("invalid snaplen %s", optarg);
280 else if (snaplen == 0)
291 if (optind >= argc) {
296 dlt = pcap_datalink_name_to_val(argv[optind]);
298 dlt = (int)strtol(argv[optind], &p, 10);
299 if (p == argv[optind] || *p != '\0')
300 error("invalid data link type %s", argv[optind]);
304 cmdbuf = read_infile(infile);
306 cmdbuf = copy_argv(&argv[optind+1]);
309 pcap_set_optimizer_debug(dflag);
310 pcap_set_print_dot_graph(gflag);
313 pd = pcap_open_dead(dlt, snaplen);
315 error("Can't open fake pcap_t");
317 if (pcap_compile(pd, &fcode, cmdbuf, Oflag, netmask) < 0)
318 error("%s", pcap_geterr(pd));
321 if (!bpf_validate(fcode.bf_insns, fcode.bf_len))
322 warn("Filter doesn't pass validation");
325 if (cmdbuf != NULL) {
326 // replace line feed with space
327 for (cp = cmdbuf; *cp != '\0'; ++cp) {
328 if (*cp == '\r' || *cp == '\n') {
332 // only show machine code if BDEBUG defined, since dflag > 3
333 printf("machine codes for filter: %s\n", cmdbuf);
335 printf("machine codes for empty filter:\n");
338 bpf_dump(&fcode, dflag);
341 pcap_freecode (&fcode);
349 (void)fprintf(stderr, "%s, with %s\n", program_name,
351 (void)fprintf(stderr,
353 "Usage: %s [-dgO] [ -F file ] [ -m netmask] [ -s snaplen ] dlt [ expression ]\n",
355 "Usage: %s [-dO] [ -F file ] [ -m netmask] [ -s snaplen ] dlt [ expression ]\n",