X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/87b129ad3a96a9a29d3bd36a945f69ddf4dad911..72b94e239a5cbebf59d8640f574d8fd5d1763398:/tcpdump.c diff --git a/tcpdump.c b/tcpdump.c index 7f6e0780..65defd0d 100644 --- a/tcpdump.c +++ b/tcpdump.c @@ -132,7 +132,6 @@ The Regents of the University of California. All rights reserved.\n"; #include "interface.h" #include "addrtoname.h" #include "machdep.h" -#include "gmt2local.h" #include "pcap-missing.h" #include "ascii_strcasecmp.h" @@ -142,9 +141,9 @@ The Regents of the University of California. All rights reserved.\n"; #define PATH_MAX 1024 #endif -#ifdef SIGINFO +#if defined(SIGINFO) #define SIGNAL_REQ_INFO SIGINFO -#elif SIGUSR1 +#elif defined(SIGUSR1) #define SIGNAL_REQ_INFO SIGUSR1 #endif @@ -152,7 +151,9 @@ The Regents of the University of California. All rights reserved.\n"; #define SIGNAL_FLUSH_PCAP SIGUSR2 #endif +#if defined(HAVE_PCAP_CREATE) || defined(_WIN32) static int Bflag; /* buffer size */ +#endif #ifdef HAVE_PCAP_DUMP_FTELL64 static int64_t Cflag; /* rotate dump files after this many bytes */ #else @@ -186,13 +187,15 @@ static int Lflag; /* list available data link types and exit */ static int Iflag; /* rfmon (monitor) mode */ #ifdef HAVE_PCAP_SET_TSTAMP_TYPE static int Jflag; /* list available time stamp types */ -#endif static int jflag = -1; /* packet time stamp source */ +#endif static int pflag; /* don't go promiscuous */ #ifdef HAVE_PCAP_SETDIRECTION static int Qflag = -1; /* restrict captured packet by send/receive direction */ #endif +#ifdef HAVE_PCAP_DUMP_FLUSH static int Uflag; /* "unbuffered" output of dump files */ +#endif static int Wflag; /* recycle output files after this number of files */ static int WflagChars; static char *zflag = NULL; /* compress each savefile using a specified command (like gzip or bzip2) */ @@ -218,7 +221,9 @@ static void cleanup(int); static void child_cleanup(int); static void print_version(void); static void print_usage(void); +#ifdef HAVE_PCAP_SET_TSTAMP_TYPE static NORETURN void show_tstamp_types_and_exit(pcap_t *, const char *device); +#endif static NORETURN void show_dlts_and_exit(pcap_t *, const char *device); #ifdef HAVE_PCAP_FINDALLDEVS static NORETURN void show_devices_and_exit(void); @@ -233,11 +238,11 @@ static void dump_packet(u_char *, const struct pcap_pkthdr *, const u_char *); static void droproot(const char *, const char *); #ifdef SIGNAL_REQ_INFO -void requestinfo(int); +static void requestinfo(int); #endif #ifdef SIGNAL_FLUSH_PCAP -void flushpcap(int); +static void flushpcap(int); #endif #ifdef _WIN32 @@ -259,6 +264,9 @@ static const struct tok status_flags[] = { { PCAP_IF_RUNNING, "Running" }, #endif { PCAP_IF_LOOPBACK, "Loopback" }, +#ifdef PCAP_IF_WIRELESS + { PCAP_IF_WIRELESS, "Wireless" }, +#endif { 0, NULL } }; #endif @@ -477,8 +485,50 @@ show_devices_and_exit(void) printf("%d.%s", i+1, dev->name); if (dev->description != NULL) printf(" (%s)", dev->description); - if (dev->flags != 0) - printf(" [%s]", bittok2str(status_flags, "none", dev->flags)); + if (dev->flags != 0) { + printf(" ["); + printf("%s", bittok2str(status_flags, "none", dev->flags)); +#ifdef PCAP_IF_WIRELESS + if (dev->flags & PCAP_IF_WIRELESS) { + switch (dev->flags & PCAP_IF_CONNECTION_STATUS) { + + case PCAP_IF_CONNECTION_STATUS_UNKNOWN: + printf(", Association status unknown"); + break; + + case PCAP_IF_CONNECTION_STATUS_CONNECTED: + printf(", Associated"); + break; + + case PCAP_IF_CONNECTION_STATUS_DISCONNECTED: + printf(", Not associated"); + break; + + case PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE: + break; + } + } else { + switch (dev->flags & PCAP_IF_CONNECTION_STATUS) { + + case PCAP_IF_CONNECTION_STATUS_UNKNOWN: + printf(", Connection status unknown"); + break; + + case PCAP_IF_CONNECTION_STATUS_CONNECTED: + printf(", Connected"); + break; + + case PCAP_IF_CONNECTION_STATUS_DISCONNECTED: + printf(", Disconnected"); + break; + + case PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE: + break; + } + } +#endif + printf("]"); + } printf("\n"); } pcap_freealldevs(devlist); @@ -687,50 +737,38 @@ droproot(const char *username, const char *chroot_dir) { struct passwd *pw = NULL; - if (chroot_dir && !username) { - fprintf(stderr, "%s: Chroot without dropping root is insecure\n", - program_name); - exit_tcpdump(S_ERR_HOST_PROGRAM); - } + if (chroot_dir && !username) + error("Chroot without dropping root is insecure"); pw = getpwnam(username); if (pw) { if (chroot_dir) { - if (chroot(chroot_dir) != 0 || chdir ("/") != 0) { - fprintf(stderr, "%s: Couldn't chroot/chdir to '%.64s': %s\n", - program_name, chroot_dir, pcap_strerror(errno)); - exit_tcpdump(S_ERR_HOST_PROGRAM); - } + if (chroot(chroot_dir) != 0 || chdir ("/") != 0) + error("Couldn't chroot/chdir to '%.64s': %s", + chroot_dir, pcap_strerror(errno)); } #ifdef HAVE_LIBCAP_NG { int ret = capng_change_id(pw->pw_uid, pw->pw_gid, CAPNG_NO_FLAG); - if (ret < 0) { - fprintf(stderr, "error : ret %d\n", ret); - } else { + if (ret < 0) + error("capng_change_id(): return %d\n", ret); + else fprintf(stderr, "dropped privs to %s\n", username); - } } #else if (initgroups(pw->pw_name, pw->pw_gid) != 0 || - setgid(pw->pw_gid) != 0 || setuid(pw->pw_uid) != 0) { - fprintf(stderr, "%s: Couldn't change to '%.32s' uid=%lu gid=%lu: %s\n", - program_name, username, + setgid(pw->pw_gid) != 0 || setuid(pw->pw_uid) != 0) + error("Couldn't change to '%.32s' uid=%lu gid=%lu: %s", + username, (unsigned long)pw->pw_uid, (unsigned long)pw->pw_gid, pcap_strerror(errno)); - exit_tcpdump(S_ERR_HOST_PROGRAM); - } else { fprintf(stderr, "dropped privs to %s\n", username); } #endif /* HAVE_LIBCAP_NG */ - } - else { - fprintf(stderr, "%s: Couldn't find user '%.32s'\n", - program_name, username); - exit_tcpdump(S_ERR_HOST_PROGRAM); - } + } else + error("Couldn't find user '%.32s'", username); #ifdef HAVE_LIBCAP_NG /* We don't need CAP_SETUID, CAP_SETGID and CAP_SYS_CHROOT any more. */ DIAG_OFF_CLANG(assign-enum) @@ -1074,7 +1112,11 @@ parse_interface_number(const char *device) } static char * -find_interface_by_number(const char *url, long devnum) +find_interface_by_number(const char *url +#ifndef HAVE_PCAP_FINDALLDEVS_EX +_U_ +#endif +, long devnum) { pcap_if_t *dev, *devlist; long i; @@ -1205,9 +1247,9 @@ open_interface(const char *device, netdissect_options *ndo, char *ebuf) status = pcap_set_tstamp_precision(pc, ndo->ndo_tstamp_precision); if (status != 0) error("%s: Can't set %ssecond time stamp precision: %s", - device, - tstamp_precision_to_string(ndo->ndo_tstamp_precision), - pcap_statustostr(status)); + device, + tstamp_precision_to_string(ndo->ndo_tstamp_precision), + pcap_statustostr(status)); #endif #ifdef HAVE_PCAP_SET_IMMEDIATE_MODE @@ -1215,8 +1257,7 @@ open_interface(const char *device, netdissect_options *ndo, char *ebuf) status = pcap_set_immediate_mode(pc, 1); if (status != 0) error("%s: Can't set immediate mode: %s", - device, - pcap_statustostr(status)); + device, pcap_statustostr(status)); } #endif /* @@ -1261,7 +1302,11 @@ open_interface(const char *device, netdissect_options *ndo, char *ebuf) status = pcap_set_tstamp_type(pc, jflag); if (status < 0) error("%s: Can't set time stamp type: %s", - device, pcap_statustostr(status)); + device, pcap_statustostr(status)); + else if (status > 0) + warning("When trying to set timestamp type '%s' on %s: %s", + pcap_tstamp_type_val_to_name(jflag), device, + pcap_statustostr(status)); } #endif status = pcap_activate(pc); @@ -1366,7 +1411,6 @@ main(int argc, char **argv) { int cnt, op, i; bpf_u_int32 localnet = 0, netmask = 0; - int timezone_offset = 0; char *cp, *infile, *cmdbuf, *device, *RFileName, *VFileName, *WFileName; char *endp; pcap_handler callback; @@ -1823,14 +1867,11 @@ main(int argc, char **argv) switch (ndo->ndo_tflag) { case 0: /* Default */ - case 4: /* Default + Date*/ - timezone_offset = gmt2local(0); - break; - case 1: /* No time stamp */ case 2: /* Unix timeval style */ - case 3: /* Microseconds since previous packet */ - case 5: /* Microseconds since first packet */ + case 3: /* Microseconds/nanoseconds since previous packet */ + case 4: /* Date + Default */ + case 5: /* Microseconds/nanoseconds since first packet */ break; default: /* Not supported */ @@ -1941,6 +1982,10 @@ main(int argc, char **argv) RFileName, dlt_name, pcap_datalink_val_to_description(dlt)); } +#ifdef DLT_LINUX_SLL2 + if (dlt == DLT_LINUX_SLL2) + fprintf(stderr, "Warning: interface names might be incorrect\n"); +#endif } else { /* * We're doing a live capture. @@ -2088,7 +2133,7 @@ main(int argc, char **argv) capdns = capdns_setup(); #endif /* HAVE_CASPER */ - init_print(ndo, localnet, netmask, timezone_offset); + init_print(ndo, localnet, netmask); #ifndef _WIN32 (void)setsignal(SIGPIPE, cleanup); @@ -2910,7 +2955,8 @@ print_packet(u_char *user, const struct pcap_pkthdr *h, const u_char *sp) } #ifdef SIGNAL_REQ_INFO -void requestinfo(int signo _U_) +static void +requestinfo(int signo _U_) { if (infodelay) ++infoprint; @@ -2920,7 +2966,8 @@ void requestinfo(int signo _U_) #endif #ifdef SIGNAL_FLUSH_PCAP -void flushpcap(int signo _U_) +static void +flushpcap(int signo _U_) { if (pdd != NULL) pcap_dump_flush(pdd);