diff options
Diffstat (limited to 'contrib/tcpdump/tcpdump.c')
| -rw-r--r-- | contrib/tcpdump/tcpdump.c | 691 |
1 files changed, 517 insertions, 174 deletions
diff --git a/contrib/tcpdump/tcpdump.c b/contrib/tcpdump/tcpdump.c index dd39e4bf36e5..4314a1a8b390 100644 --- a/contrib/tcpdump/tcpdump.c +++ b/contrib/tcpdump/tcpdump.c @@ -26,11 +26,11 @@ */ #ifndef lint -static const char copyright[] = +static const char copyright[] _U_ = "@(#) 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 1.173 2001/12/22 22:12:23 guy Exp $ (LBL)"; +static const char rcsid[] _U_ = + "@(#) $Header: /tcpdump/master/tcpdump/tcpdump.c,v 1.216.2.10 2004/03/17 19:47:48 guy Exp $ (LBL)"; #endif /* $FreeBSD$ */ @@ -47,27 +47,30 @@ static const char rcsid[] = #include "config.h" #endif -#include <sys/types.h> -#include <sys/time.h> +#include <tcpdump-stdinc.h> -#include <netinet/in.h> +#ifdef WIN32 +#include "getopt.h" +#include "w32_fzs.h" +extern int strcasecmp (const char *__s1, const char *__s2); +extern int SIZE_BUF; +#define off_t long +#define uint UINT +#endif /* WIN32 */ #include <pcap.h> #include <signal.h> #include <stdio.h> #include <stdlib.h> #include <string.h> -#include <unistd.h> -#include <ctype.h> - #include "interface.h" #include "addrtoname.h" #include "machdep.h" #include "setsignal.h" #include "gmt2local.h" +#include "pcap-missing.h" -int aflag; /* translate network and broadcast addresses */ int dflag; /* print filter code */ int eflag; /* print ethernet header */ int fflag; /* don't translate "foreign" IP address */ @@ -81,12 +84,14 @@ 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; /* "unbuffered" output of dump files */ 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 dlt = -1; /* if != -1, ask libpcap for the DLT it names */ +int Aflag = 0; /* print packet only in ascii observing LF, CR, TAB, SPACE */ +int dlt = -1; /* if != -1, ask libpcap for the DLT it names */ const char *dlt_name = NULL; @@ -94,8 +99,8 @@ char *espsecret = NULL; /* ESP secret key */ int packettype; -int infodelay; -int infoprint; +static int infodelay; +static int infoprint; char *program_name; @@ -106,22 +111,32 @@ static RETSIGTYPE cleanup(int); static void usage(void) __attribute__((noreturn)); static void show_dlts_and_exit(pcap_t *pd) __attribute__((noreturn)); -static void dump_and_trunc(u_char *, const struct pcap_pkthdr *, const u_char *); +static void print_packet(u_char *, const struct pcap_pkthdr *, const u_char *); +static void dump_packet_and_trunc(u_char *, const struct pcap_pkthdr *, const u_char *); +static void dump_packet(u_char *, const struct pcap_pkthdr *, const u_char *); #ifdef SIGINFO RETSIGTYPE requestinfo(int); #endif +static void info(int); +static u_int packets_captured; + /* Length of saved portion of packet. */ int snaplen = DEFAULT_SNAPLEN; +typedef u_int (*if_printer)(const struct pcap_pkthdr *, const u_char *); + struct printer { - pcap_handler f; + if_printer f; int type; }; static struct printer printers[] = { { arcnet_if_print, DLT_ARCNET }, +#ifdef DLT_ARCNET_LINUX + { arcnet_linux_if_print, DLT_ARCNET_LINUX }, +#endif { ether_if_print, DLT_EN10MB }, { token_if_print, DLT_IEEE802 }, #ifdef DLT_LANE8023 @@ -134,9 +149,13 @@ static struct printer printers[] = { { cip_if_print, DLT_ATM_CLIP }, #endif { sl_if_print, DLT_SLIP }, +#ifdef DLT_SLIP_BSDOS { sl_bsdos_if_print, DLT_SLIP_BSDOS }, +#endif { ppp_if_print, DLT_PPP }, +#ifdef DLT_PPP_BSDOS { ppp_bsdos_if_print, DLT_PPP_BSDOS }, +#endif { fddi_if_print, DLT_FDDI }, { null_if_print, DLT_NULL }, #ifdef DLT_LOOP @@ -165,10 +184,37 @@ static struct printer printers[] = { #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 +#ifdef DLT_IP_OVER_FC + { ipfc_if_print, DLT_IP_OVER_FC }, +#endif +#ifdef DLT_PRISM_HEADER + { prism_if_print, DLT_PRISM_HEADER }, +#endif +#ifdef DLT_IEEE802_11_RADIO + { ieee802_11_radio_if_print, DLT_IEEE802_11_RADIO }, +#endif +#ifdef DLT_ENC + { enc_if_print, DLT_ENC }, +#endif +#ifdef DLT_APPLE_IP_OVER_IEEE1394 + { ap1394_if_print, DLT_APPLE_IP_OVER_IEEE1394 }, +#endif { NULL, 0 }, }; -static pcap_handler +static if_printer lookup_printer(int type) { struct printer *p; @@ -177,7 +223,7 @@ lookup_printer(int type) if (type == p->type) return p->f; - error("unknown data link type %d", type); + return NULL; /* NOTREACHED */ } @@ -187,112 +233,101 @@ extern int optind; extern int opterr; extern char *optarg; +struct print_info { + if_printer printer; +}; + struct dump_info { char *WFileName; pcap_t *pd; pcap_dumper_t *p; }; -struct dlt_choice { - const char* name; - int dlt; -}; - -#define DLT_CHOICE(code) { #code, code } -#define DLT_CHOICE_SENTINEL { NULL, 0 } - -struct dlt_choice dlt_choices[] = { - DLT_CHOICE(DLT_ARCNET), - DLT_CHOICE(DLT_EN10MB), - DLT_CHOICE(DLT_IEEE802), -#ifdef DLT_LANE8023 - DLT_CHOICE(DLT_LANE8023), -#endif -#ifdef DLT_CIP - DLT_CHOICE(DLT_CIP), -#endif -#ifdef DLT_ATM_CLIP - DLT_CHOICE(DLT_ATM_CLIP), -#endif - DLT_CHOICE(DLT_SLIP), - DLT_CHOICE(DLT_SLIP_BSDOS), - DLT_CHOICE(DLT_PPP), - DLT_CHOICE(DLT_PPP_BSDOS), - DLT_CHOICE(DLT_FDDI), - DLT_CHOICE(DLT_NULL), -#ifdef DLT_LOOP - DLT_CHOICE(DLT_LOOP), -#endif - DLT_CHOICE(DLT_RAW), - DLT_CHOICE(DLT_ATM_RFC1483), -#ifdef DLT_C_HDLC - DLT_CHOICE(DLT_C_HDLC), -#endif -#ifdef DLT_HDLC - DLT_CHOICE(DLT_HDLC), -#endif -#ifdef DLT_PPP_SERIAL - DLT_CHOICE(DLT_PPP_SERIAL), -#endif -#ifdef DLT_PPP_ETHER - DLT_CHOICE(DLT_PPP_ETHER), -#endif -#ifdef DLT_LINUX_SLL - DLT_CHOICE(DLT_LINUX_SLL), -#endif -#ifdef DLT_IEEE802_11 - DLT_CHOICE(DLT_IEEE802_11), -#endif -#ifdef DLT_LTALK - DLT_CHOICE(DLT_LTALK), -#endif -#ifdef DLT_PFLOG - DLT_CHOICE(DLT_PFLOG), -#endif - DLT_CHOICE_SENTINEL -}; - static void show_dlts_and_exit(pcap_t *pd) { - int i, n_dlts; + int n_dlts; int *dlts = 0; + const char *dlt_name; + n_dlts = pcap_list_datalinks(pd, &dlts); if (n_dlts < 0) error("%s", pcap_geterr(pd)); else if (n_dlts == 0 || !dlts) error("No data link types."); - (void) fprintf(stderr, "Data link types (use option -y):\n"); + (void) fprintf(stderr, "Data link types (use option -y to set):\n"); while (--n_dlts >= 0) { - for (i = 0; dlt_choices[i].name; i++) { - if (dlt_choices[i].dlt != dlts[n_dlts]) { - continue; - } - (void) fprintf(stderr, " %s\n", - dlt_choices[i].name + sizeof("DLT_") - 1); - break; + dlt_name = pcap_datalink_val_to_name(dlts[n_dlts]); + if (dlt_name != NULL) { + (void) fprintf(stderr, " %s (%s)", dlt_name, + pcap_datalink_val_to_description(dlts[n_dlts])); + + /* + * OK, does tcpdump handle that type? + */ + if (lookup_printer(dlts[n_dlts]) == NULL) + (void) fprintf(stderr, " (not supported)"); + putchar('\n'); + } else { + (void) fprintf(stderr, " DLT %d (not supported)\n", + dlts[n_dlts]); } - if (!dlt_choices[i].name) - fprintf(stderr, " %d (not supported)\n", dlts[n_dlts]); } free(dlts); exit(0); } +/* + * Set up flags that might or might not be supported depending on the + * version of libpcap we're using. + */ +#ifdef WIN32 +#define B_FLAG "B:" +#define B_FLAG_USAGE " [ -B size ]" +#else /* WIN32 */ +#define B_FLAG +#define B_FLAG_USAGE +#endif /* WIN32 */ + +#ifdef HAVE_PCAP_FINDALLDEVS +#define D_FLAG "D" +#else +#define D_FLAG +#endif + +#ifdef HAVE_PCAP_DUMP_FLUSH +#define U_FLAG "U" +#else +#define U_FLAG +#endif + int main(int argc, char **argv) { register int cnt, op, i; bpf_u_int32 localnet, netmask; register char *cp, *infile, *cmdbuf, *device, *RFileName, *WFileName; - pcap_handler printer; + pcap_handler callback; + int type; struct bpf_program fcode; +#ifndef WIN32 RETSIGTYPE (*oldhandler)(int); +#endif + struct print_info printinfo; struct dump_info dumpinfo; u_char *pcap_userdata; char ebuf[PCAP_ERRBUF_SIZE]; +#ifdef HAVE_PCAP_FINDALLDEVS + pcap_if_t *devpointer; + int devnum; +#endif + int status; +#ifdef WIN32 + u_int UserBufferSize = 1000000; + if(wsockinit() != 0) return 1; +#endif /* WIN32 */ cnt = -1; device = NULL; @@ -310,15 +345,29 @@ main(int argc, char **argv) #ifdef LIBSMI smiInit("tcpdump"); #endif - + opterr = 0; while ( - (op = getopt(argc, argv, "ac:C:deE:fF:i:lLm:nNOpqr:Rs:StT:uvw:xXy:Y")) != -1) + (op = getopt(argc, argv, "aA" B_FLAG "c:C:d" D_FLAG "eE:fF:i:lLm:nNOpqr:Rs:StT:u" U_FLAG "vw:xXy:Y")) != -1) switch (op) { case 'a': - ++aflag; + /* compatibility for old -a */ + break; + + case 'A': + ++xflag; + ++Xflag; + ++Aflag; + break; + +#ifdef WIN32 + case 'B': + UserBufferSize = atoi(optarg)*1024; + if (UserBufferSize < 0) + error("invalid packet buffer size %s", optarg); break; +#endif /* WIN32 */ case 'c': cnt = atoi(optarg); @@ -328,7 +377,7 @@ main(int argc, char **argv) case 'C': Cflag = atoi(optarg) * 1000000; - if (Cflag < 0) + if (Cflag < 0) error("invalid file size %s", optarg); break; @@ -336,6 +385,22 @@ main(int argc, char **argv) ++dflag; break; +#ifdef HAVE_PCAP_FINDALLDEVS + case 'D': + if (pcap_findalldevs(&devpointer, ebuf) < 0) + error("%s", ebuf); + else { + for (i = 0; devpointer != 0; i++) { + printf("%d.%s", i+1, devpointer->name); + if (devpointer->description != NULL) + printf(" (%s)", devpointer->description); + printf("\n"); + devpointer = devpointer->next; + } + } + return 0; +#endif /* HAVE_PCAP_FINDALLDEVS */ + case 'L': Lflag++; break; @@ -360,15 +425,59 @@ main(int argc, char **argv) break; case 'i': + if (optarg[0] == '0' && optarg[1] == 0) + error("Invalid adapter index"); + +#ifdef HAVE_PCAP_FINDALLDEVS + /* + * If the argument is a number, treat it as + * an index into the list of adapters, as + * printed by "tcpdump -D". + * + * This should be OK on UNIX systems, as interfaces + * shouldn't have names that begin with digits. + * It can be useful on Windows, where more than + * one interface can have the same name. + */ + if ((devnum = atoi(optarg)) != 0) { + if (devnum < 0) + error("Invalid adapter index"); + + if (pcap_findalldevs(&devpointer, ebuf) < 0) + error("%s", ebuf); + else { + for (i = 0; i < devnum-1; i++){ + devpointer = devpointer->next; + if (devpointer == NULL) + error("Invalid adapter index"); + } + } + device = devpointer->name; + break; + } +#endif /* HAVE_PCAP_FINDALLDEVS */ device = optarg; break; case 'l': +#ifdef WIN32 + /* + * _IOLBF is the same as _IOFBF in Microsoft's C + * libraries; the only alternative they offer + * is _IONBF. + * + * XXX - this should really be checking for MSVC++, + * not WIN32, if, for example, MinGW has its own + * C library that is more UNIX-compatible. + */ + setvbuf(stdout, NULL, _IONBF, 0); +#else /* WIN32 */ #ifdef HAVE_SETLINEBUF setlinebuf(stdout); #else setvbuf(stdout, NULL, _IOLBF, 0); #endif +#endif /* WIN32 */ break; case 'n': @@ -390,7 +499,8 @@ main(int argc, char **argv) program_name, optarg); (void)fprintf(stderr, "(no libsmi support)\n"); #endif - + break; + case 'O': Oflag = 0; break; @@ -446,6 +556,10 @@ main(int argc, char **argv) packettype = PT_SNMP; else if (strcasecmp(optarg, "cnfp") == 0) packettype = PT_CNFP; + else if (strcasecmp(optarg, "tftp") == 0) + packettype = PT_TFTP; + else if (strcasecmp(optarg, "aodv") == 0) + packettype = PT_AODV; else error("unknown packet type `%s'", optarg); break; @@ -453,7 +567,13 @@ main(int argc, char **argv) case 'u': ++uflag; break; - + +#ifdef HAVE_PCAP_DUMP_FLUSH + case 'U': + ++Uflag; + break; +#endif + case 'v': ++vflag; break; @@ -467,31 +587,28 @@ main(int argc, char **argv) break; case 'X': - ++xflag; + ++xflag; ++Xflag; break; case 'y': - for (i = 0; dlt_choices[i].name; i++) { - if (!strcasecmp(dlt_choices[i].name + - sizeof("DLT_") - 1, - optarg)) { - dlt = dlt_choices[i].dlt; - dlt_name = dlt_choices[i].name; - break; - } - } - if (dlt < 0) { - error("invalid data link type %s", optarg); - } + dlt_name = optarg; + dlt = pcap_datalink_name_to_val(dlt_name); + if (dlt < 0) + error("invalid data link type %s", dlt_name); break; -#ifdef YYDEBUG +#if defined(HAVE_PCAP_DEBUG) || defined(HAVE_YYDEBUG) case 'Y': { /* Undocumented flag */ +#ifdef HAVE_PCAP_DEBUG + extern int pcap_debug; + pcap_debug = 1; +#else extern int yydebug; yydebug = 1; +#endif } break; #endif @@ -500,23 +617,39 @@ main(int argc, char **argv) /* NOTREACHED */ } - if (aflag && nflag) - error("-a and -n options are incompatible"); - if (tflag > 0) thiszone = gmt2local(0); if (RFileName != NULL) { + int dlt; + const char *dlt_name; + +#ifndef WIN32 /* - * We don't need network access, so set it back to the user id. - * Also, this prevents the user from reading anyone's - * trace file. + * We don't need network access, so relinquish any set-UID + * or set-GID privileges we have (if any). + * + * We do *not* want set-UID privileges when opening a + * trace file, as that might let the user read other + * people's trace files (especially if we're set-UID + * root). */ setuid(getuid()); - +#endif /* WIN32 */ pd = pcap_open_offline(RFileName, ebuf); if (pd == NULL) error("%s", ebuf); + dlt = pcap_datalink(pd); + dlt_name = pcap_datalink_val_to_name(dlt); + if (dlt_name == NULL) { + fprintf(stderr, "reading from file %s, link-type %u\n", + RFileName, dlt); + } else { + fprintf(stderr, + "reading from file %s, link-type %s (%s)\n", + RFileName, dlt_name, + pcap_datalink_val_to_description(dlt)); + } localnet = 0; netmask = 0; if (fflag != 0) @@ -527,18 +660,44 @@ main(int argc, char **argv) if (device == NULL) error("%s", ebuf); } +#ifdef WIN32 + if(IsTextUnicode(device, + wcslen((short*)device), // Device always ends with a double \0, so this way to determine its + // length should be always valid + NULL)) + { + fprintf(stderr, "%s: listening on %ws\n", program_name, device); + } + else + { + fprintf(stderr, "%s: listening on %s\n", program_name, device); + } + + fflush(stderr); +#endif /* WIN32 */ *ebuf = '\0'; pd = pcap_open_live(device, snaplen, !pflag, 1000, ebuf); if (pd == NULL) error("%s", ebuf); else if (*ebuf) warning("%s", ebuf); - if (Lflag) { + if (Lflag) show_dlts_and_exit(pd); - } if (dlt >= 0) { +#ifdef HAVE_PCAP_SET_DATALINK if (pcap_set_datalink(pd, dlt) < 0) error("%s", pcap_geterr(pd)); +#else + /* + * We don't actually support changing the + * data link type, so we only let them + * set it to what it already is. + */ + if (dlt != pcap_datalink(pd)) { + error("%s is not one of the DLTs supported by this device\n", + dlt_name); + } +#endif (void)fprintf(stderr, "%s: data link type %s\n", program_name, dlt_name); (void)fflush(stderr); @@ -556,7 +715,9 @@ main(int argc, char **argv) /* * Let user own process after socket has been opened. */ +#ifndef WIN32 setuid(getuid()); +#endif /* WIN32 */ } if (infile) cmdbuf = read_infile(infile); @@ -567,15 +728,21 @@ main(int argc, char **argv) error("%s", pcap_geterr(pd)); if (dflag) { bpf_dump(&fcode, dflag); + pcap_close(pd); exit(0); } init_addrtoname(localnet, netmask); +#ifndef WIN32 + (void)setsignal(SIGPIPE, cleanup); +#endif /* WIN32 */ (void)setsignal(SIGTERM, cleanup); (void)setsignal(SIGINT, cleanup); /* Cooperate with nohup(1) */ +#ifndef WIN32 if ((oldhandler = setsignal(SIGHUP, cleanup)) != SIG_DFL) (void)setsignal(SIGHUP, oldhandler); +#endif /* WIN32 */ if (pcap_setfilter(pd, &fcode) < 0) error("%s", pcap_geterr(pd)); @@ -584,53 +751,123 @@ main(int argc, char **argv) if (p == NULL) error("%s", pcap_geterr(pd)); if (Cflag != 0) { - printer = dump_and_trunc; + callback = dump_packet_and_trunc; dumpinfo.WFileName = WFileName; dumpinfo.pd = pd; dumpinfo.p = p; pcap_userdata = (u_char *)&dumpinfo; } else { - printer = pcap_dump; + callback = dump_packet; pcap_userdata = (u_char *)p; } } else { - printer = lookup_printer(pcap_datalink(pd)); - pcap_userdata = 0; + type = pcap_datalink(pd); + printinfo.printer = lookup_printer(type); + if (printinfo.printer == NULL) { + dlt_name = pcap_datalink_val_to_name(type); + if (dlt_name != NULL) + error("unsupported data link type %s", dlt_name); + else + error("unsupported data link type %d", type); + } + callback = print_packet; + pcap_userdata = (u_char *)&printinfo; + } #ifdef SIGINFO - (void)setsignal(SIGINFO, requestinfo); + (void)setsignal(SIGINFO, requestinfo); #endif - } +#ifndef WIN32 if (RFileName == NULL) { - (void)fprintf(stderr, "%s: listening on %s\n", - program_name, device); + int dlt; + const char *dlt_name; + + if (!vflag && !WFileName) { + (void)fprintf(stderr, + "%s: verbose output suppressed, use -v or -vv for full protocol decode\n", + program_name); + } else + (void)fprintf(stderr, "%s: ", program_name); + dlt = pcap_datalink(pd); + dlt_name = pcap_datalink_val_to_name(dlt); + if (dlt_name == NULL) { + (void)fprintf(stderr, "listening on %s, link-type %u, capture size %u bytes\n", + device, dlt, snaplen); + } else { + (void)fprintf(stderr, "listening on %s, link-type %s (%s), capture size %u bytes\n", + device, dlt_name, + pcap_datalink_val_to_description(dlt), snaplen); + } (void)fflush(stderr); } - if (pcap_loop(pd, cnt, printer, pcap_userdata) < 0) { +#endif /* WIN32 */ + status = pcap_loop(pd, cnt, callback, pcap_userdata); + if (WFileName == NULL) { + /* + * We're printing packets. Flush the printed output, + * so it doesn't get intermingled with error output. + */ + if (status == -2) { + /* + * We got interrupted, so perhaps we didn't + * manage to finish a line we were printing. + * Print an extra newline, just in case. + */ + putchar('\n'); + } + (void)fflush(stdout); + } + if (status == -1) { + /* + * Error. Report it. + */ (void)fprintf(stderr, "%s: pcap_loop: %s\n", program_name, pcap_geterr(pd)); - exit(1); } - if (RFileName == NULL) + if (RFileName == NULL) { + /* + * We're doing a live capture. Report the capture + * statistics. + */ info(1); + } pcap_close(pd); - exit(0); + exit(status == -1 ? 1 : 0); } /* make a clean exit on interrupts */ static RETSIGTYPE -cleanup(int signo) +cleanup(int signo _U_) { - - /* Can't print the summary if reading from a savefile */ +#ifdef HAVE_PCAP_BREAKLOOP + /* + * We have "pcap_breakloop()"; use it, so that we do as little + * as possible in the signal handler (it's probably not safe + * to do anything with standard I/O streams in a signal handler - + * the ANSI C standard doesn't say it is). + */ + pcap_breakloop(pd); +#else + /* + * We don't have "pcap_breakloop()"; this isn't safe, but + * it's the best we can do. Print the summary if we're + * not reading from a savefile - i.e., if we're doing a + * live capture - and exit. + */ if (pd != NULL && pcap_file(pd) == NULL) { + /* + * We got interrupted, so perhaps we didn't + * manage to finish a line we were printing. + * Print an extra newline, just in case. + */ + putchar('\n'); (void)fflush(stdout); - putc('\n', stderr); info(1); } exit(0); +#endif } -void +static void info(register int verbose) { struct pcap_stat stat; @@ -639,8 +876,15 @@ info(register int verbose) (void)fprintf(stderr, "pcap_stats: %s\n", pcap_geterr(pd)); return; } + if (!verbose) fprintf(stderr, "%s: ", program_name); + + (void)fprintf(stderr, "%u packets captured", packets_captured); + if (!verbose) + fputs(", ", stderr); + else + putc('\n', stderr); (void)fprintf(stderr, "%d packets received by filter", stat.ps_recv); if (!verbose) fputs(", ", stderr); @@ -678,73 +922,156 @@ swebitoa(unsigned int n, char *s) } static void -dump_and_trunc(u_char *user, const struct pcap_pkthdr *h, const u_char *sp) +dump_packet_and_trunc(u_char *user, const struct pcap_pkthdr *h, const u_char *sp) { - struct dump_info *info; + struct dump_info *dump_info; static uint cnt = 2; char *name; - info = (struct dump_info *)user; - + ++packets_captured; + + ++infodelay; + + dump_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 (ftell((FILE *)dump_info->p) > Cflag) { + /* + * Close the current file and open a new one. + */ + pcap_dump_close(dump_info->p); + if (cnt >= 1000) + error("too many output files"); + name = (char *) malloc(strlen(dump_info->WFileName) + 4); if (name == NULL) - error("dump_and_trunc: malloc"); - strcpy(name, info->WFileName); - swebitoa(cnt, name + strlen(info->WFileName)); + error("dump_packet_and_trunc: malloc"); + strcpy(name, dump_info->WFileName); + swebitoa(cnt, name + strlen(dump_info->WFileName)); cnt++; - pcap_dump_close(info->p); - info->p = pcap_dump_open(info->pd, name); + dump_info->p = pcap_dump_open(dump_info->pd, name); free(name); - if (info->p == NULL) + if (dump_info->p == NULL) error("%s", pcap_geterr(pd)); } - pcap_dump((u_char *)info->p, h, sp); + pcap_dump((u_char *)dump_info->p, h, sp); +#ifdef HAVE_PCAP_DUMP_FLUSH + if (Uflag) + pcap_dump_flush(dump_info->p); +#endif + + --infodelay; + if (infoprint) + info(0); } -/* Like default_print() but data need not be aligned */ -void -default_print_unaligned(register const u_char *cp, register u_int length) +static void +dump_packet(u_char *user, const struct pcap_pkthdr *h, const u_char *sp) { - register u_int i, s; - register int nshorts; + ++packets_captured; - 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); + ++infodelay; + + pcap_dump(user, h, sp); +#ifdef HAVE_PCAP_DUMP_FLUSH + if (Uflag) + pcap_dump_flush((pcap_dumper_t *)user); +#endif + + --infodelay; + if (infoprint) + info(0); +} + +static void +print_packet(u_char *user, const struct pcap_pkthdr *h, const u_char *sp) +{ + struct print_info *print_info; + u_int hdrlen; + + ++packets_captured; + + ++infodelay; + ts_print(&h->ts); + + print_info = (struct print_info *)user; + + /* + * Some printers want to check that they're not walking off the + * end of the packet. + * Rather than pass it all the way down, we set this global. + */ + snapend = sp + h->caplen; + + hdrlen = (*print_info->printer)(h, sp); + if (xflag) { + /* + * Print the raw packet data. + */ + if (xflag > 1) { + /* + * Include the link-layer header. + */ + default_print(sp, h->caplen); + } else { + /* + * Don't include the link-layer header - and if + * we have nothing past the link-layer header, + * print nothing. + */ + if (h->caplen > hdrlen) + default_print(sp + hdrlen, + h->caplen - hdrlen); + } } + + putchar('\n'); + + --infodelay; + if (infoprint) + info(0); } +#ifdef WIN32 + /* + * XXX - there should really be libpcap calls to get the version + * number as a string (the string would be generated from #defines + * at run time, so that it's not generated from string constants + * in the library, as, on many UNIX systems, those constants would + * be statically linked into the application executable image, and + * would thus reflect the version of libpcap on the system on + * which the application was *linked*, not the system on which it's + * *running*. + * + * That routine should be documented, unlike the "version[]" + * string, so that UNIX vendors providing their own libpcaps + * don't omit it (as a couple of vendors have...). + * + * Packet.dll should perhaps also export a routine to return the + * version number of the Packet.dll code, to supply the + * "Wpcap_version" information on Windows. + */ + char WDversion[]="current-cvs.tcpdump.org"; + char version[]="current-cvs.tcpdump.org"; + char pcap_version[]="current-cvs.tcpdump.org"; + char Wpcap_version[]="3.0 alpha"; +#endif + /* - * By default, print the packet out in hex. + * By default, print the specified data out in hex. */ void default_print(register const u_char *bp, register u_int length) { - default_print_unaligned(bp, length); + ascii_print("\n\t", bp, length); /* pass on lf and identation string */ } #ifdef SIGINFO -RETSIGTYPE requestinfo(int signo) +RETSIGTYPE requestinfo(int signo _U_) { if (infodelay) ++infoprint; @@ -757,16 +1084,32 @@ static void usage(void) { extern char version[]; +#ifndef HAVE_PCAP_LIB_VERSION +#if defined(WIN32) || defined(HAVE_PCAP_VERSION) extern char pcap_version[]; +#else /* defined(WIN32) || defined(HAVE_PCAP_VERSION) */ + static char pcap_version[] = "unknown"; +#endif /* defined(WIN32) || defined(HAVE_PCAP_VERSION) */ +#endif /* HAVE_PCAP_LIB_VERSION */ +#ifdef HAVE_PCAP_LIB_VERSION + (void)fprintf(stderr, "%s version %s\n", program_name, version); + (void)fprintf(stderr, "%s\n", pcap_lib_version()); +#else /* HAVE_PCAP_LIB_VERSION */ +#ifdef WIN32 + (void)fprintf(stderr, "%s version %s, based on tcpdump version %s\n", program_name, WDversion, version); + (void)fprintf(stderr, "WinPcap version %s, based on libpcap version %s\n",Wpcap_version, pcap_version); +#else /* WIN32 */ (void)fprintf(stderr, "%s version %s\n", program_name, version); (void)fprintf(stderr, "libpcap version %s\n", pcap_version); +#endif /* WIN32 */ +#endif /* HAVE_PCAP_LIB_VERSION */ (void)fprintf(stderr, -"Usage: %s [-adeflLnNOpqRStuvxX] [ -c count ] [ -C file_size ]\n", program_name); +"Usage: %s [-aAd" D_FLAG "eflLnNOpqRStu" U_FLAG "vxX]" B_FLAG_USAGE " [-c count] [ -C file_size ]\n", program_name); (void)fprintf(stderr, -"\t\t[ -F file ] [ -i interface ] [ -r file ] [ -s snaplen ]\n"); +"\t\t[ -E algo:secret ] [ -F file ] [ -i interface ] [ -r file ]\n"); (void)fprintf(stderr, -"\t\t[ -T type ] [ -w file ] [ -E algo:secret ] [ -y datalinktype ]\n"); +"\t\t[ -s snaplen ] [ -T type ] [ -w file ] [ -y datalinktype ]\n"); (void)fprintf(stderr, "\t\t[ expression ]\n"); exit(1); |