237 lines
5.7 KiB
C
237 lines
5.7 KiB
C
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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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#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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#else
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#include <unistd.h>
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#endif
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#include <errno.h>
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#include "pcap/funcattrs.h"
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#ifdef _WIN32
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#include "portability.h"
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#endif
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#define MAXIMUM_SNAPLEN 65535
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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 warning(const char *, ...) PCAP_PRINTFLIKE(1, 2);
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int
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main(int argc, char **argv)
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{
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register int op;
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register char *cp, *device;
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int dorfmon, dopromisc, snaplen, useactivate, bufsize;
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char ebuf[PCAP_ERRBUF_SIZE];
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pcap_if_t *devlist;
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pcap_t *pd;
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int status = 0;
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device = NULL;
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dorfmon = 0;
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dopromisc = 0;
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snaplen = MAXIMUM_SNAPLEN;
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bufsize = 0;
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useactivate = 0;
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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, "i:Ips:aB:")) != -1) {
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switch (op) {
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case 'i':
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device = optarg;
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break;
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case 'I':
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dorfmon = 1;
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useactivate = 1; /* required for rfmon */
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break;
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case 'p':
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dopromisc = 1;
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break;
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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 > MAXIMUM_SNAPLEN)
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error("invalid snaplen %s", optarg);
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else if (snaplen == 0)
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snaplen = MAXIMUM_SNAPLEN;
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break;
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}
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case 'B':
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bufsize = atoi(optarg)*1024;
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if (bufsize <= 0)
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error("invalid packet buffer size %s", optarg);
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useactivate = 1; /* required for bufsize */
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break;
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case 'a':
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useactivate = 1;
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break;
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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 (device == NULL) {
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if (pcap_findalldevs(&devlist, ebuf) == -1)
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error("%s", ebuf);
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if (devlist == NULL)
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error("no interfaces available for capture");
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device = strdup(devlist->name);
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pcap_freealldevs(devlist);
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}
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if (useactivate) {
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pd = pcap_create(device, ebuf);
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if (pd == NULL)
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error("%s: pcap_create failed: %s", device, ebuf);
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status = pcap_set_snaplen(pd, snaplen);
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if (status != 0)
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error("%s: pcap_set_snaplen failed: %s",
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device, pcap_statustostr(status));
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if (dopromisc) {
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status = pcap_set_promisc(pd, 1);
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if (status != 0)
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error("%s: pcap_set_promisc failed: %s",
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device, pcap_statustostr(status));
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}
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if (dorfmon) {
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status = pcap_set_rfmon(pd, 1);
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if (status != 0)
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error("%s: pcap_set_rfmon failed: %s",
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device, pcap_statustostr(status));
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}
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status = pcap_set_timeout(pd, 1000);
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if (status != 0)
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error("%s: pcap_set_timeout failed: %s",
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device, pcap_statustostr(status));
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if (bufsize != 0) {
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status = pcap_set_buffer_size(pd, bufsize);
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if (status != 0)
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error("%s: pcap_set_buffer_size failed: %s",
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device, pcap_statustostr(status));
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}
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status = pcap_activate(pd);
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if (status < 0) {
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/*
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* pcap_activate() failed.
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*/
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error("%s: %s\n(%s)", device,
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pcap_statustostr(status), pcap_geterr(pd));
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} else if (status > 0) {
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/*
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* pcap_activate() succeeded, but it's warning us
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* of a problem it had.
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*/
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warning("%s: %s\n(%s)", device,
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pcap_statustostr(status), pcap_geterr(pd));
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} else
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printf("%s opened successfully\n", device);
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} else {
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*ebuf = '\0';
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pd = pcap_open_live(device, 65535, 0, 1000, ebuf);
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if (pd == NULL)
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error("%s", ebuf);
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else if (*ebuf)
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warning("%s", ebuf);
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else
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printf("%s opened successfully\n", device);
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}
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pcap_close(pd);
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exit(status < 0 ? 1 : 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,
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"Usage: %s [ -Ipa ] [ -i interface ] [ -s snaplen ] [ -B bufsize ]\n",
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program_name);
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exit(1);
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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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warning(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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