"@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997\n\
The Regents of the University of California. All rights reserved.\n";
static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/tcpdump.c,v 1.129 1999-10-07 23:47:13 mcr Exp $ (LBL)";
+ "@(#) $Header: /tcpdump/master/tcpdump/tcpdump.c,v 1.161 2001-04-30 16:08:43 fenner Exp $ (LBL)";
#endif
/*
* combined efforts of Van, Steve McCanne and Craig Leres of LBL.
*/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
#include <sys/types.h>
#include <sys/time.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+#include <ctype.h>
+
#include "interface.h"
#include "addrtoname.h"
int Oflag = 1; /* run filter code optimizer */
int pflag; /* don't go promiscuous */
int qflag; /* quick (shorter) output */
+int Rflag = 1; /* print sequence # field in AH/ESP*/
+int sflag = 0; /* use the libsmi to translate OIDs */
int Sflag; /* print raw TCP sequence numbers */
int tflag = 1; /* print packet arrival time */
+int uflag = 0; /* Print undecoded NFS handles */
int vflag; /* verbose */
int xflag; /* print packet in hex */
+int Xflag; /* print packet in ascii as well as hex */
+
+char *espsecret = NULL; /* ESP secret key */
int packettype;
int32_t thiszone; /* seconds offset from gmt to local time */
-/* Externs */
-extern void bpf_dump(struct bpf_program *, int);
-
/* Forwards */
-RETSIGTYPE cleanup(int);
-extern __dead void usage(void) __attribute__((volatile));
+static RETSIGTYPE cleanup(int);
+static void usage(void) __attribute__((noreturn));
/* Length of saved portion of packet. */
int snaplen = DEFAULT_SNAPLEN;
};
static struct printer printers[] = {
+ { arcnet_if_print, DLT_ARCNET },
{ ether_if_print, DLT_EN10MB },
- { ether_if_print, DLT_IEEE802 },
+ { token_if_print, DLT_IEEE802 },
+#ifdef DLT_LANE8023
+ { lane_if_print, DLT_LANE8023 },
+#endif
+#ifdef DLT_CIP
+ { cip_if_print, DLT_CIP },
+#endif
+#ifdef DLT_ATM_CLIP
+ { cip_if_print, DLT_ATM_CLIP },
+#endif
{ sl_if_print, DLT_SLIP },
{ sl_bsdos_if_print, DLT_SLIP_BSDOS },
{ ppp_if_print, DLT_PPP },
{ ppp_bsdos_if_print, DLT_PPP_BSDOS },
{ fddi_if_print, DLT_FDDI },
{ null_if_print, DLT_NULL },
+#ifdef DLT_LOOP
+ { null_if_print, DLT_LOOP },
+#endif
{ raw_if_print, DLT_RAW },
{ atm_if_print, DLT_ATM_RFC1483 },
+#ifdef DLT_C_HDLC
+ { chdlc_if_print, DLT_C_HDLC },
+#endif
+#ifdef DLT_HDLC
+ { chdlc_if_print, DLT_HDLC },
+#endif
+#ifdef DLT_PPP_SERIAL
+ { ppp_hdlc_if_print, DLT_PPP_SERIAL },
+#endif
+#ifdef DLT_LINUX_SLL
+ { sll_if_print, DLT_LINUX_SLL },
+#endif
{ NULL, 0 },
};
if (type == p->type)
return p->f;
- error("unknown data link type 0x%x", type);
+ error("unknown data link type %d", type);
/* NOTREACHED */
}
else
program_name = argv[0];
- if (abort_on_misalignment(ebuf) < 0)
+ if (abort_on_misalignment(ebuf, sizeof(ebuf)) < 0)
error("%s", ebuf);
+#ifdef LIBSMI
+ smiInit("tcpdump");
+#endif
+
opterr = 0;
while (
- (op = getopt(argc, argv, "ac:defF:i:lnNOpqr:s:StT:vw:xY")) != EOF)
+ (op = getopt(argc, argv, "ac:deE:fF:i:lm:nNOpqr:Rs:StT:uvw:xXY")) != -1)
switch (op) {
case 'a':
++eflag;
break;
+ case 'E':
+#ifndef HAVE_LIBCRYPTO
+ warning("crypto code not compiled in");
+#endif
+ espsecret = optarg;
+ break;
+
case 'f':
++fflag;
break;
++Nflag;
break;
+ case 'm':
+#ifdef LIBSMI
+ if (smiLoadModule(optarg) == 0) {
+ error("could not load MIB module %s", optarg);
+ }
+ sflag = 1;
+#else
+ (void)fprintf(stderr, "%s: ignoring option `-m %s' ",
+ program_name, optarg);
+ (void)fprintf(stderr, "(no libsmi support)\n");
+#endif
+
case 'O':
Oflag = 0;
break;
RFileName = optarg;
break;
- case 's':
- snaplen = atoi(optarg);
- if (snaplen <= 0)
+ case 'R':
+ Rflag = 0;
+ break;
+
+ case 's': {
+ char *end;
+
+ snaplen = strtol(optarg, &end, 0);
+ if (optarg == end || *end != '\0'
+ || snaplen < 0 || snaplen > 65535)
error("invalid snaplen %s", optarg);
+ else if (snaplen == 0)
+ snaplen = 65535;
break;
+ }
case 'S':
++Sflag;
packettype = PT_RTP;
else if (strcasecmp(optarg, "rtcp") == 0)
packettype = PT_RTCP;
+ else if (strcasecmp(optarg, "snmp") == 0)
+ packettype = PT_SNMP;
+ else if (strcasecmp(optarg, "cnfp") == 0)
+ packettype = PT_CNFP;
else
error("unknown packet type `%s'", optarg);
break;
+ case 'u':
+ ++uflag;
+ break;
+
case 'v':
++vflag;
break;
case 'w':
WFileName = optarg;
break;
+
+ case 'x':
+ ++xflag;
+ break;
+
+ case 'X':
+ ++xflag;
+ ++Xflag;
+ break;
+
#ifdef YYDEBUG
case 'Y':
{
}
break;
#endif
- case 'x':
- ++xflag;
- break;
-
default:
usage();
/* NOTREACHED */
if (device == NULL)
error("%s", ebuf);
}
+ *ebuf = '\0';
pd = pcap_open_live(device, snaplen, !pflag, 1000, ebuf);
if (pd == NULL)
error("%s", ebuf);
+ else if (*ebuf)
+ warning("%s", ebuf);
i = pcap_snapshot(pd);
if (snaplen < i) {
warning("snaplen raised from %d to %d", snaplen, i);
}
/* make a clean exit on interrupts */
-RETSIGTYPE
+static RETSIGTYPE
cleanup(int signo)
{
struct pcap_stat stat;
register u_int i, s;
register int nshorts;
+ if (Xflag) {
+ ascii_print(cp, length);
+ return;
+ }
nshorts = (u_int) length / sizeof(u_short);
i = 0;
while (--nshorts >= 0) {
/*
* By default, print the packet out in hex.
- *
- * (BTW, please don't send us patches to print the packet out in ascii)
*/
void
default_print(register const u_char *bp, register u_int length)
{
- register const u_short *sp;
- register u_int i;
- register int nshorts;
-
- if ((long)bp & 1) {
- default_print_unaligned(bp, length);
- return;
- }
- sp = (u_short *)bp;
- nshorts = (u_int) length / sizeof(u_short);
- i = 0;
- while (--nshorts >= 0) {
- if ((i++ % 8) == 0)
- (void)printf("\n\t\t\t");
- (void)printf(" %04x", ntohs(*sp++));
- }
- if (length & 1) {
- if ((i % 8) == 0)
- (void)printf("\n\t\t\t");
- (void)printf(" %02x", *(u_char *)sp);
- }
+ default_print_unaligned(bp, length);
}
-__dead void
+static void
usage(void)
{
extern char version[];
(void)fprintf(stderr, "%s version %s\n", program_name, version);
(void)fprintf(stderr, "libpcap version %s\n", pcap_version);
(void)fprintf(stderr,
-"Usage: %s [-adeflnNOpqStvx] [-c count] [ -F file ]\n", program_name);
+"Usage: %s [-adeflnNOpqStuvxX] [-c count] [ -F file ]\n", program_name);
(void)fprintf(stderr,
"\t\t[ -i interface ] [ -r file ] [ -s snaplen ]\n");
(void)fprintf(stderr,
projects / tcpdump / blobdiff