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Restore a few necessary parts of libpcap. Final commit for libpcap 1.9.0 upgrade
This commit is contained in:
dmiller
359
libpcap/testprogs/filtertest.c
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359
libpcap/testprogs/filtertest.c
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@@ -0,0 +1,359 @@
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/*
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* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include "varattrs.h"
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#ifndef lint
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static const char copyright[] _U_ =
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"@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <pcap.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#ifdef _WIN32
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#include "getopt.h"
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#include "unix.h"
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#else
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#include <unistd.h>
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#endif
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#include <fcntl.h>
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#include <errno.h>
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#ifdef _WIN32
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#include <winsock2.h>
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#include <ws2tcpip.h>
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#else
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "pcap/funcattrs.h"
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#ifdef BDEBUG
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/*
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* We have pcap_set_optimizer_debug() and pcap_set_print_dot_graph() in
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* libpcap; declare them (they're not declared by any libpcap header,
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* because they're special hacks, only available if libpcap was configured
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* to include them, and only intended for use by libpcap developers trying
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* to debug the optimizer for filter expressions).
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*/
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PCAP_API void pcap_set_optimizer_debug(int);
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PCAP_API void pcap_set_print_dot_graph(int);
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#endif
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static char *program_name;
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/* Forwards */
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static void PCAP_NORETURN usage(void);
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static void PCAP_NORETURN error(const char *, ...) PCAP_PRINTFLIKE(1, 2);
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static void warn(const char *, ...) PCAP_PRINTFLIKE(1, 2);
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/*
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* On Windows, we need to open the file in binary mode, so that
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* we get all the bytes specified by the size we get from "fstat()".
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* On UNIX, that's not necessary. O_BINARY is defined on Windows;
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* we define it as 0 if it's not defined, so it does nothing.
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*/
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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static char *
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read_infile(char *fname)
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{
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register int i, fd, cc;
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register char *cp;
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struct stat buf;
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fd = open(fname, O_RDONLY|O_BINARY);
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if (fd < 0)
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error("can't open %s: %s", fname, pcap_strerror(errno));
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if (fstat(fd, &buf) < 0)
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error("can't stat %s: %s", fname, pcap_strerror(errno));
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cp = malloc((u_int)buf.st_size + 1);
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if (cp == NULL)
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error("malloc(%d) for %s: %s", (u_int)buf.st_size + 1,
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fname, pcap_strerror(errno));
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cc = read(fd, cp, (u_int)buf.st_size);
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if (cc < 0)
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error("read %s: %s", fname, pcap_strerror(errno));
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if (cc != buf.st_size)
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error("short read %s (%d != %d)", fname, cc, (int)buf.st_size);
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close(fd);
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/* replace "# comment" with spaces */
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for (i = 0; i < cc; i++) {
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if (cp[i] == '#')
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while (i < cc && cp[i] != '\n')
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cp[i++] = ' ';
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}
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cp[cc] = '\0';
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return (cp);
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}
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/* VARARGS */
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static void
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error(const char *fmt, ...)
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{
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va_list ap;
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(void)fprintf(stderr, "%s: ", program_name);
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va_start(ap, fmt);
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(void)vfprintf(stderr, fmt, ap);
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va_end(ap);
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if (*fmt) {
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fmt += strlen(fmt);
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if (fmt[-1] != '\n')
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(void)fputc('\n', stderr);
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}
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exit(1);
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/* NOTREACHED */
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}
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/* VARARGS */
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static void
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warn(const char *fmt, ...)
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{
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va_list ap;
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(void)fprintf(stderr, "%s: WARNING: ", program_name);
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va_start(ap, fmt);
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(void)vfprintf(stderr, fmt, ap);
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va_end(ap);
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if (*fmt) {
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fmt += strlen(fmt);
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if (fmt[-1] != '\n')
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(void)fputc('\n', stderr);
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}
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}
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/*
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* Copy arg vector into a new buffer, concatenating arguments with spaces.
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*/
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static char *
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copy_argv(register char **argv)
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{
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register char **p;
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register u_int len = 0;
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char *buf;
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char *src, *dst;
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p = argv;
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if (*p == 0)
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return 0;
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while (*p)
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len += strlen(*p++) + 1;
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buf = (char *)malloc(len);
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if (buf == NULL)
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error("copy_argv: malloc");
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p = argv;
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dst = buf;
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while ((src = *p++) != NULL) {
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while ((*dst++ = *src++) != '\0')
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;
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dst[-1] = ' ';
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}
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dst[-1] = '\0';
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return buf;
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}
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int
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main(int argc, char **argv)
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{
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char *cp;
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int op;
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int dflag;
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int gflag;
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char *infile;
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int Oflag;
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long snaplen;
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char *p;
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int dlt;
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int have_fcode = 0;
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bpf_u_int32 netmask = PCAP_NETMASK_UNKNOWN;
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char *cmdbuf;
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pcap_t *pd;
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struct bpf_program fcode;
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#ifdef _WIN32
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if (pcap_wsockinit() != 0)
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return 1;
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#endif /* _WIN32 */
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dflag = 1;
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gflag = 0;
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infile = NULL;
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Oflag = 1;
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snaplen = 68;
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if ((cp = strrchr(argv[0], '/')) != NULL)
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program_name = cp + 1;
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else
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program_name = argv[0];
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opterr = 0;
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while ((op = getopt(argc, argv, "dF:gm:Os:")) != -1) {
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switch (op) {
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case 'd':
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++dflag;
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break;
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case 'g':
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#ifdef BDEBUG
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++gflag;
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#else
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error("libpcap and filtertest not built with optimizer debugging enabled");
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#endif
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break;
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case 'F':
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infile = optarg;
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break;
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case 'O':
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Oflag = 0;
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break;
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case 'm': {
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bpf_u_int32 addr;
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switch (inet_pton(AF_INET, optarg, &addr)) {
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case 0:
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error("invalid netmask %s", optarg);
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break;
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case -1:
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error("invalid netmask %s: %s", optarg,
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pcap_strerror(errno));
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break;
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case 1:
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netmask = addr;
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break;
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}
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break;
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}
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case 's': {
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char *end;
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snaplen = strtol(optarg, &end, 0);
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if (optarg == end || *end != '\0'
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|| snaplen < 0 || snaplen > 65535)
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error("invalid snaplen %s", optarg);
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else if (snaplen == 0)
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snaplen = 65535;
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break;
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}
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default:
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usage();
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/* NOTREACHED */
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}
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}
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if (optind >= argc) {
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usage();
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/* NOTREACHED */
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}
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dlt = pcap_datalink_name_to_val(argv[optind]);
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if (dlt < 0) {
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dlt = (int)strtol(argv[optind], &p, 10);
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if (p == argv[optind] || *p != '\0')
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error("invalid data link type %s", argv[optind]);
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}
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if (infile)
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cmdbuf = read_infile(infile);
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else
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cmdbuf = copy_argv(&argv[optind+1]);
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#ifdef BDEBUG
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pcap_set_optimizer_debug(dflag);
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pcap_set_print_dot_graph(gflag);
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#endif
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pd = pcap_open_dead(dlt, snaplen);
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if (pd == NULL)
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error("Can't open fake pcap_t");
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if (pcap_compile(pd, &fcode, cmdbuf, Oflag, netmask) < 0)
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error("%s", pcap_geterr(pd));
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have_fcode = 1;
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if (!bpf_validate(fcode.bf_insns, fcode.bf_len))
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warn("Filter doesn't pass validation");
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#ifdef BDEBUG
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if (cmdbuf != NULL) {
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// replace line feed with space
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for (cp = cmdbuf; *cp != '\0'; ++cp) {
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if (*cp == '\r' || *cp == '\n') {
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*cp = ' ';
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}
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}
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// only show machine code if BDEBUG defined, since dflag > 3
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printf("machine codes for filter: %s\n", cmdbuf);
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} else
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printf("machine codes for empty filter:\n");
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#endif
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bpf_dump(&fcode, dflag);
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free(cmdbuf);
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if (have_fcode)
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pcap_freecode (&fcode);
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pcap_close(pd);
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exit(0);
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr, "%s, with %s\n", program_name,
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pcap_lib_version());
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(void)fprintf(stderr,
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#ifdef BDEBUG
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"Usage: %s [-dgO] [ -F file ] [ -m netmask] [ -s snaplen ] dlt [ expression ]\n",
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#else
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"Usage: %s [-dO] [ -F file ] [ -m netmask] [ -s snaplen ] dlt [ expression ]\n",
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#endif
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program_name);
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exit(1);
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}
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