/*
- * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
+ * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Support for splitting captures into multiple files with a maximum
+ * file size:
+ *
+ * Copyright (c) 2001
*/
#ifndef lint
static const char copyright[] =
- "@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997\n\
+ "@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000\n\
The Regents of the University of California. All rights reserved.\n";
static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/tcpdump.c,v 1.136 1999-12-13 18:06:15 mcr Exp $ (LBL)";
+ "@(#) $Header: /tcpdump/master/tcpdump/tcpdump.c,v 1.179 2002-07-11 09:17:25 guy Exp $ (LBL)";
#endif
/*
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+#include <ctype.h>
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
#include "interface.h"
#include "addrtoname.h"
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 */
+off_t Cflag = 0; /* rotate dump files after this many bytes */
+int Aflag = 0; /* print packet only in ascii observing LF, CR, TAB, SPACE */
-char *ahsecret = NULL; /* AH secret key */
char *espsecret = NULL; /* ESP secret key */
int packettype;
+int infodelay;
+int infoprint;
char *program_name;
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));
+
+static void dump_and_trunc(u_char *, const struct pcap_pkthdr *, const u_char *);
+
+#ifdef SIGINFO
+RETSIGTYPE requestinfo(int);
+#endif
/* 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_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_CHDLC
- { chdlc_if_print, DLT_CHDLC },
+#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_PPP_ETHER
+ { pppoe_if_print, DLT_PPP_ETHER },
+#endif
+#ifdef DLT_LINUX_SLL
+ { sll_if_print, DLT_LINUX_SLL },
+#endif
+#ifdef DLT_IEEE802_11
+ { ieee802_11_if_print, DLT_IEEE802_11},
+#endif
+#ifdef DLT_LTALK
+ { ltalk_if_print, DLT_LTALK },
+#endif
+#ifdef DLT_PFLOG
+ { pflog_if_print, DLT_PFLOG },
+#endif
+#ifdef DLT_FR
+ { fr_if_print, DLT_FR },
+#endif
+#ifdef DLT_FRELAY
+ { fr_if_print, DLT_FRELAY },
+#endif
+#ifdef DLT_SUNATM
+ { sunatm_if_print, DLT_SUNATM },
#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 */
}
extern int opterr;
extern char *optarg;
+struct dump_info {
+ char *WFileName;
+ pcap_t *pd;
+ pcap_dumper_t *p;
+};
+
int
main(int argc, char **argv)
{
pcap_handler printer;
struct bpf_program fcode;
RETSIGTYPE (*oldhandler)(int);
+ struct dump_info dumpinfo;
u_char *pcap_userdata;
char ebuf[PCAP_ERRBUF_SIZE];
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:deE:fF:i:lnNm:Opqr:Rs:StT:vw:xY")) != EOF)
+ (op = getopt(argc, argv, "aAc:C:deE:fF:i:lm:nNOpqr:Rs:StT:uvw:xXY")) != -1)
switch (op) {
case 'a':
++aflag;
break;
-#if 0
- case 'A':
-#ifndef CRYPTO
- warning("crypto code not compiled in");
-#endif
- ahsecret = optarg;
- break;
-#endif
+ case 'A':
+ ++xflag;
+ ++Xflag;
+ ++Aflag;
+ break;
case 'c':
cnt = atoi(optarg);
error("invalid packet count %s", optarg);
break;
+ case 'C':
+ Cflag = atoi(optarg) * 1000000;
+ if (Cflag < 0)
+ error("invalid file size %s", optarg);
+ break;
+
case 'd':
++dflag;
break;
break;
case 'E':
-#ifndef CRYPTO
+#ifndef HAVE_LIBCRYPTO
warning("crypto code not compiled in");
#endif
espsecret = optarg;
program_name, optarg);
(void)fprintf(stderr, "(no libsmi support)\n");
#endif
-
+
case 'O':
Oflag = 0;
break;
Rflag = 0;
break;
- case 's':
- snaplen = atoi(optarg);
- if (snaplen <= 0)
+ 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_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);
pcap_dumper_t *p = pcap_dump_open(pd, WFileName);
if (p == NULL)
error("%s", pcap_geterr(pd));
- printer = pcap_dump;
- pcap_userdata = (u_char *)p;
+ if (Cflag != 0) {
+ printer = dump_and_trunc;
+ dumpinfo.WFileName = WFileName;
+ dumpinfo.pd = pd;
+ dumpinfo.p = p;
+ pcap_userdata = (u_char *)&dumpinfo;
+ } else {
+ printer = pcap_dump;
+ pcap_userdata = (u_char *)p;
+ }
} else {
printer = lookup_printer(pcap_datalink(pd));
pcap_userdata = 0;
+#ifdef SIGINFO
+ (void)setsignal(SIGINFO, requestinfo);
+#endif
}
if (RFileName == NULL) {
(void)fprintf(stderr, "%s: listening on %s\n",
if (pcap_loop(pd, cnt, printer, pcap_userdata) < 0) {
(void)fprintf(stderr, "%s: pcap_loop: %s\n",
program_name, pcap_geterr(pd));
+ cleanup(0);
+ pcap_close(pd);
exit(1);
}
+ if (RFileName == NULL)
+ info(1);
pcap_close(pd);
exit(0);
}
/* make a clean exit on interrupts */
-RETSIGTYPE
+static RETSIGTYPE
cleanup(int signo)
{
- struct pcap_stat stat;
/* Can't print the summary if reading from a savefile */
if (pd != NULL && pcap_file(pd) == NULL) {
(void)fflush(stdout);
putc('\n', stderr);
- if (pcap_stats(pd, &stat) < 0)
- (void)fprintf(stderr, "pcap_stats: %s\n",
- pcap_geterr(pd));
- else {
- (void)fprintf(stderr, "%d packets received by filter\n",
- stat.ps_recv);
- (void)fprintf(stderr, "%d packets dropped by kernel\n",
- stat.ps_drop);
- }
+ info(1);
}
- exit(0);
+ if (signo)
+ exit(0);
+}
+
+void
+info(register int verbose)
+{
+ struct pcap_stat stat;
+
+ if (pcap_stats(pd, &stat) < 0) {
+ (void)fprintf(stderr, "pcap_stats: %s\n", pcap_geterr(pd));
+ return;
+ }
+ if (!verbose)
+ fprintf(stderr, "%s: ", program_name);
+ (void)fprintf(stderr, "%d packets received by filter", stat.ps_recv);
+ if (!verbose)
+ fputs(", ", stderr);
+ else
+ putc('\n', stderr);
+ (void)fprintf(stderr, "%d packets dropped by kernel\n", stat.ps_drop);
+ infoprint = 0;
+}
+
+static void
+reverse(char *s)
+{
+ int i, j, c;
+
+ for (i = 0, j = strlen(s) - 1; i < j; i++, j--) {
+ c = s[i];
+ s[i] = s[j];
+ s[j] = c;
+ }
+}
+
+
+static void
+swebitoa(unsigned int n, char *s)
+{
+ unsigned int i;
+
+ i = 0;
+ do {
+ s[i++] = n % 10 + '0';
+ } while ((n /= 10) > 0);
+
+ s[i] = '\0';
+ reverse(s);
+}
+
+static void
+dump_and_trunc(u_char *user, const struct pcap_pkthdr *h, const u_char *sp)
+{
+ struct dump_info *info;
+ static uint cnt = 2;
+ char *name;
+
+ info = (struct dump_info *)user;
+
+ /*
+ * XXX - this won't prevent capture files from getting
+ * larger than Cflag - the last packet written to the
+ * file could put it over Cflag.
+ */
+ if (ftell((FILE *)info->p) > Cflag) {
+ name = (char *) malloc(strlen(info->WFileName) + 4);
+ if (name == NULL)
+ error("dump_and_trunc: malloc");
+ strcpy(name, info->WFileName);
+ swebitoa(cnt, name + strlen(info->WFileName));
+ cnt++;
+ pcap_dump_close(info->p);
+ info->p = pcap_dump_open(info->pd, name);
+ free(name);
+ if (info->p == NULL)
+ error("%s", pcap_geterr(pd));
+ }
+
+ pcap_dump((u_char *)info->p, h, sp);
}
/* Like default_print() but data need not be aligned */
void
default_print_unaligned(register const u_char *cp, register u_int length)
{
- register u_int i, s;
- register int nshorts;
-
- char line[81];
-
- nshorts = (u_int) length / sizeof(u_short);
- i = 0;
- memset(line, ' ', 80);
- line[81]='\0';
-
- putchar('\n');
- while (nshorts >= 0) {
-
- sprintf(line+20+i*5, "%02x%02x ", cp[0], cp[1]);
-
- if(isprint(cp[0])) {
- line[62+i*2]=cp[0];
- } else {
- line[62+i*2]='.';
- }
- if(isprint(cp[1])) {
- line[62+i*2+1]=cp[1];
- } else {
- line[62+i*2+1]='.';
- }
- i++;
- if (i == 8) {
- line[60]=' ';
- line[61]=' ';
- line[62+16]='\0';
- puts(line);
- i=0;
- }
- cp += 2;
- nshorts--;
- }
+ 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) {
+ if ((i++ % 8) == 0)
+ (void)printf("\n\t\t\t");
+ s = *cp++;
+ (void)printf(" %02x%02x", s, *cp++);
+ }
+ if (length & 1) {
+ if ((i % 8) == 0)
+ (void)printf("\n\t\t\t");
+ (void)printf(" %02x", *cp);
+ }
}
/*
* 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;
-
default_print_unaligned(bp, length);
}
-__dead void
+#ifdef SIGINFO
+RETSIGTYPE requestinfo(int signo)
+{
+ if (infodelay)
+ ++infoprint;
+ else
+ info(0);
+}
+#endif
+
+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 [-aAdeflnNOpqRStuvxX] [ -c count ] [ -C file_size ]\n", program_name);
(void)fprintf(stderr,
-"\t\t[ -i interface ] [ -r file ] [ -s snaplen ]\n");
+"\t\t[ -F file ] [ -i interface ] [ -r file ] [ -s snaplen ]\n");
(void)fprintf(stderr,
-"\t\t[ -T type ] [ -w file ] [ expression ]\n");
- exit(-1);
+"\t\t[ -T type ] [ -w file ] [ -E algo:secret ] [ expression ]\n");
+ exit(1);
}
projects / tcpdump / blobdiff