X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/ab3d424294b1daebe35c1b1b946da8f5dea1a916..e76768c97a70934b8f3a41fe2df705c61a924a47:/tcpdump.c diff --git a/tcpdump.c b/tcpdump.c index b08e00f1..d9f3e0fa 100644 --- a/tcpdump.c +++ b/tcpdump.c @@ -57,6 +57,10 @@ extern int SIZE_BUF; #include #endif +#ifdef HAVE_LIBCRYPTO +#include +#endif + #ifdef HAVE_GETOPT_LONG #include #else @@ -122,7 +126,8 @@ int32_t thiszone; /* seconds offset from gmt to local time */ /* Forwards */ static RETSIGTYPE cleanup(int); static RETSIGTYPE child_cleanup(int); -static void usage(void) __attribute__((noreturn)); +static void print_version(void); +static void print_usage(void); static void show_dlts_and_exit(const char *device, pcap_t *pd) __attribute__((noreturn)); static void print_packet(u_char *, const struct pcap_pkthdr *, const u_char *); @@ -638,13 +643,16 @@ show_devices_and_exit (void) * doesn't make sense; it should be --verbosity={N} or something such * as that. * - * We do not currently have long options with no corresponding short - * options; for those, we should define values outside the range of - * ASCII graphic characters, make that the last component of the - * entry for the long option, and have a case for that option in the - * switch statement. + * For long options with no corresponding short options, we define values + * outside the range of ASCII graphic characters, make that the last + * component of the entry for the long option, and have a case for that + * option in the switch statement. */ -static struct option longopts[] = { +#define OPTION_NUMBER 128 +#define OPTION_VERSION 129 +#define OPTION_TSTAMP_PRECISION 130 + +static const struct option longopts[] = { #if defined(HAVE_PCAP_CREATE) || defined(WIN32) { "buffer-size", required_argument, NULL, 'B' }, #endif @@ -658,6 +666,7 @@ static struct option longopts[] = { { "time-stamp-type", required_argument, NULL, 'j' }, { "list-time-stamp-types", no_argument, NULL, 'J' }, #endif + { "time-stamp-precision", required_argument, NULL, OPTION_TSTAMP_PRECISION}, { "dont-verify-checksums", no_argument, NULL, 'K' }, { "list-data-link-types", no_argument, NULL, 'L' }, { "no-optimize", no_argument, NULL, 'O' }, @@ -675,7 +684,8 @@ static struct option longopts[] = { { "debug-filter-parser", no_argument, NULL, 'Y' }, #endif { "relinquish-privileges", required_argument, NULL, 'Z' }, - { "number", no_argument, NULL, 'z' + 1}, + { "number", no_argument, NULL, OPTION_NUMBER }, + { "version", no_argument, NULL, OPTION_VERSION }, { NULL, 0, NULL, 0 } }; @@ -703,7 +713,10 @@ droproot(const char *username, const char *chroot_dir) #ifdef HAVE_CAP_NG_H int ret = capng_change_id(pw->pw_uid, pw->pw_gid, CAPNG_NO_FLAG); if (ret < 0) { - printf("error : ret %d\n", ret); + fprintf(stderr, "error : ret %d\n", ret); + } + else { + printf("dropped privs to %s\n", username); } /* We don't need CAP_SETUID and CAP_SETGID */ capng_update(CAPNG_DROP, CAPNG_EFFECTIVE, CAP_SETUID); @@ -722,6 +735,9 @@ droproot(const char *username, const char *chroot_dir) pcap_strerror(errno)); exit(1); } + else { + printf("dropped privs to %s\n", username); + } #endif /* HAVE_CAP_NG_H */ } else { @@ -832,6 +848,18 @@ get_next_file(FILE *VFile, char *ptr) return ret; } +static int +tstamp_precision_from_string(const char *precision) +{ + if (strncmp(precision, "nano", strlen("nano")) == 0) + return PCAP_TSTAMP_PRECISION_NANO; + + if (strncmp(precision, "micro", strlen("micro")) == 0) + return PCAP_TSTAMP_PRECISION_MICRO; + + return -EINVAL; +} + int main(int argc, char **argv) { @@ -979,7 +1007,8 @@ main(int argc, char **argv) break; case 'h': - usage(); + print_usage(); + exit(0); break; case 'H': @@ -1257,12 +1286,24 @@ main(int argc, char **argv) username = strdup(optarg); break; - case 'z' + 1: + case OPTION_NUMBER: gndo->ndo_packet_number = 1; break; + case OPTION_VERSION: + print_version(); + exit(0); + break; + + case OPTION_TSTAMP_PRECISION: + gndo->ndo_tstamp_precision = tstamp_precision_from_string(optarg); + if (gndo->ndo_tstamp_precision < 0) + error("unsupported time stamp precision"); + break; + default: - usage(); + print_usage(); + exit(1); /* NOTREACHED */ } @@ -1351,7 +1392,11 @@ main(int argc, char **argv) RFileName = VFileLine; } - pd = pcap_open_offline(RFileName, ebuf); + if (gndo->ndo_tstamp_precision == PCAP_TSTAMP_PRECISION_NANO) + pd = pcap_open_offline_with_tstamp_precision(RFileName, PCAP_TSTAMP_PRECISION_NANO, ebuf); + else + pd = pcap_open_offline_with_tstamp_precision(RFileName, PCAP_TSTAMP_PRECISION_MICRO, ebuf); + if (pd == NULL) error("%s", ebuf); dlt = pcap_datalink(pd); @@ -1398,6 +1443,13 @@ main(int argc, char **argv) if (Jflag) show_tstamp_types_and_exit(device, pd); #endif + if (gndo->ndo_tstamp_precision == PCAP_TSTAMP_PRECISION_NANO) { + status = pcap_set_tstamp_precision(pd, PCAP_TSTAMP_PRECISION_NANO); + if (status != 0) + error("%s: Can't set nanosecond time stamp precision: %s", + device, pcap_statustostr(status)); + } + /* * Is this an interface that supports monitor mode? */ @@ -2242,8 +2294,9 @@ static void verbose_stats_dump(int sig _U_) } #endif +USES_APPLE_DEPRECATED_API static void -usage(void) +print_version(void) { extern char version[]; #ifndef HAVE_PCAP_LIB_VERSION @@ -2270,6 +2323,21 @@ usage(void) (void)fprintf(stderr, "libpcap version %s\n", pcap_version); #endif /* WIN32 */ #endif /* HAVE_PCAP_LIB_VERSION */ + +#if defined(HAVE_LIBCRYPTO) && defined(SSLEAY_VERSION) + (void)fprintf (stderr, "%s\n", SSLeay_version(SSLEAY_VERSION)); +#endif + +#if defined(HAVE_SMI_H) + (void)fprintf (stderr, "SMI-library: %s\n", smi_version_string); +#endif +} +USES_APPLE_RST + +static void +print_usage(void) +{ + print_version(); (void)fprintf(stderr, "Usage: %s [-aAbd" D_FLAG "efhH" I_FLAG J_FLAG "KlLnNOpqRStu" U_FLAG "vxX]" B_FLAG_USAGE " [ -c count ]\n", program_name); (void)fprintf(stderr, @@ -2281,12 +2349,11 @@ usage(void) "\t\t[ -Q in|out|inout ]\n"); #endif (void)fprintf(stderr, -"\t\t[ -r file ] [ -s snaplen ] [ -T type ] [ -V file ] [ -w file ]\n"); +"\t\t[ -r file ] [ -s snaplen ] [ -T type ] [ --version ] [ -V file ]\n"); (void)fprintf(stderr, -"\t\t[ -W filecount ] [ -y datalinktype ] [ -z command ]\n"); +"\t\t[ -w file ] [ -W filecount ] [ -y datalinktype ] [ -z command ]\n"); (void)fprintf(stderr, "\t\t[ -Z user ] [ expression ]\n"); - exit(1); }