X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/777892a591065d32fb8744675574f9214398283a..c23f7b7dcf9c014cf531d75c22cc254c7ca35e55:/tcpdump.c diff --git a/tcpdump.c b/tcpdump.c index 54809fc5..1ec0a0ff 100644 --- a/tcpdump.c +++ b/tcpdump.c @@ -1,5 +1,5 @@ /* - * 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 @@ -21,10 +21,10 @@ #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 1.134 1999-11-21 03:50:26 assar Exp $ (LBL)"; + "@(#) $Header: /tcpdump/master/tcpdump/tcpdump.c,v 1.166 2001-07-04 22:03:13 fenner Exp $ (LBL)"; #endif /* @@ -35,6 +35,10 @@ static const char rcsid[] = * combined efforts of Van, Steve McCanne and Craig Leres of LBL. */ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + #include #include @@ -46,9 +50,8 @@ static const char rcsid[] = #include #include #include +#include -#include -#include #include "interface.h" #include "addrtoname.h" @@ -66,27 +69,31 @@ 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 *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)); +#ifdef SIGINFO +RETSIGTYPE requestinfo(int); +#endif /* Length of saved portion of packet. */ int snaplen = DEFAULT_SNAPLEN; @@ -97,13 +104,17 @@ struct printer { }; 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 }, @@ -111,10 +122,31 @@ static struct printer printers[] = { { 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 { NULL, 0 }, }; @@ -128,7 +160,7 @@ lookup_printer(int type) if (type == p->type) return p->f; - error("unknown data link type 0x%x", type); + error("unknown data link type %d", type); /* NOTREACHED */ } @@ -160,27 +192,22 @@ main(int argc, char **argv) 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:lnNOpqr:Rs:StT:vw:xY")) != EOF) + (op = getopt(argc, argv, "ac: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 'c': cnt = atoi(optarg); if (cnt <= 0) @@ -196,7 +223,7 @@ main(int argc, char **argv) break; case 'E': -#ifndef CRYPTO +#ifndef HAVE_LIBCRYPTO warning("crypto code not compiled in"); #endif espsecret = optarg; @@ -230,6 +257,18 @@ main(int argc, char **argv) ++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; @@ -250,11 +289,17 @@ main(int argc, char **argv) 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; @@ -277,10 +322,16 @@ main(int argc, char **argv) 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; @@ -288,6 +339,16 @@ main(int argc, char **argv) case 'w': WFileName = optarg; break; + + case 'x': + ++xflag; + break; + + case 'X': + ++xflag; + ++Xflag; + break; + #ifdef YYDEBUG case 'Y': { @@ -297,10 +358,6 @@ main(int argc, char **argv) } break; #endif - case 'x': - ++xflag; - break; - default: usage(); /* NOTREACHED */ @@ -333,9 +390,12 @@ main(int argc, char **argv) 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); @@ -381,6 +441,9 @@ main(int argc, char **argv) } 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", @@ -397,86 +460,85 @@ main(int argc, char **argv) } /* 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); } +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; +} + /* 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[]; @@ -485,10 +547,10 @@ usage(void) (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, "\t\t[ -T type ] [ -w file ] [ expression ]\n"); - exit(-1); + exit(1); }