X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/2eb023747062b79164c8f34adbf893bec938dd9a..0023eaa78f123676bfa9c5fba72ea4b8a59aaa70:/util-print.c?ds=sidebyside diff --git a/util-print.c b/util-print.c index f9ea618d..a1269a52 100644 --- a/util-print.c +++ b/util-print.c @@ -35,17 +35,12 @@ * FOR A PARTICULAR PURPOSE. */ -#ifdef HAVE_CONFIG_H #include -#endif #include "netdissect-stdinc.h" #include -#ifdef HAVE_FCNTL_H -#include -#endif #include #include #include @@ -94,33 +89,6 @@ fn_print_str(netdissect_options *ndo, const u_char *s) } } -/* - * Print out a null-terminated filename (or other ASCII string), part of - * the packet buffer. - * If ep is NULL, assume no truncation check is needed. - * Return true if truncated. - * Stop at ep (if given) or before the null char, whichever is first. - */ -int -nd_print(netdissect_options *ndo, - const u_char *s, const u_char *ep) -{ - int ret; - u_char c; - - ret = 1; /* assume truncated */ - while (ep == NULL || s < ep) { - c = GET_U_1(s); - s++; - if (c == '\0') { - ret = 0; - break; - } - fn_print_char(ndo, c); - } - return(ret); -} - /* * Print out a null-terminated filename (or other ASCII string) from * a fixed-length field in the packet buffer, or from what remains of @@ -198,6 +166,23 @@ nd_printn(netdissect_options *ndo, return (n == 0) ? 0 : 1; } +/* + * Print a counted filename (or other ASCII string), part of + * the packet buffer, filtering out non-printable characters. + * Stop if truncated (via GET_U_1/longjmp) or after n bytes, + * whichever is first. + * The suffix comes from: j:longJmp, n:after N bytes. + */ +void +nd_printjn(netdissect_options *ndo, const u_char *s, u_int n) +{ + while (n > 0) { + fn_print_char(ndo, GET_U_1(s)); + n--; + s++; + } +} + /* * Print a null-padded filename (or other ASCII string), part of * the packet buffer, filtering out non-printable characters. @@ -224,17 +209,21 @@ nd_printjnp(netdissect_options *ndo, const u_char *s, u_int n) * Print the timestamp .FRAC part (Microseconds/nanoseconds) */ static void -ts_frac_print(netdissect_options *ndo, long usec) +ts_frac_print(netdissect_options *ndo, const struct timeval *tv) { #ifdef HAVE_PCAP_SET_TSTAMP_PRECISION switch (ndo->ndo_tstamp_precision) { case PCAP_TSTAMP_PRECISION_MICRO: - ND_PRINT(".%06u", (unsigned)usec); + ND_PRINT(".%06u", (unsigned)tv->tv_usec); + if ((unsigned)tv->tv_usec > ND_MICRO_PER_SEC - 1) + ND_PRINT(" " ND_INVALID_MICRO_SEC_STR); break; case PCAP_TSTAMP_PRECISION_NANO: - ND_PRINT(".%09u", (unsigned)usec); + ND_PRINT(".%09u", (unsigned)tv->tv_usec); + if ((unsigned)tv->tv_usec > ND_NANO_PER_SEC - 1) + ND_PRINT(" " ND_INVALID_NANO_SEC_STR); break; default: @@ -242,7 +231,9 @@ ts_frac_print(netdissect_options *ndo, long usec) break; } #else - ND_PRINT(".%06u", (unsigned)usec); + ND_PRINT(".%06u", (unsigned)tv->tv_usec); + if ((unsigned)tv->tv_usec > ND_MICRO_PER_SEC - 1) + ND_PRINT(" " ND_INVALID_MICRO_SEC_STR); #endif } @@ -252,49 +243,64 @@ ts_frac_print(netdissect_options *ndo, long usec) * if date_flag == WITH_DATE print YY:MM:DD before HH:MM:SS.FRAC */ static void -ts_date_hmsfrac_print(netdissect_options *ndo, long sec, long usec, +ts_date_hmsfrac_print(netdissect_options *ndo, const struct timeval *tv, enum date_flag date_flag, enum time_flag time_flag) { - time_t Time = sec; struct tm *tm; - char timestr[32]; + char timebuf[32]; + const char *timestr; +#ifdef _WIN32 + time_t sec; +#endif - if ((unsigned)sec & 0x80000000) { - ND_PRINT("[Error converting time]"); + if (tv->tv_sec < 0) { + ND_PRINT("[timestamp overflow]"); return; } +#ifdef _WIN32 + /* on Windows tv->tv_sec is a long not a 64-bit time_t. */ + sec = tv->tv_sec; +#endif + if (time_flag == LOCAL_TIME) - tm = localtime(&Time); +#ifdef _WIN32 + tm = localtime(&sec); +#else + tm = localtime(&tv->tv_sec); +#endif else - tm = gmtime(&Time); +#ifdef _WIN32 + tm = gmtime(&sec); +#else + tm = gmtime(&tv->tv_sec); +#endif - if (!tm) { - ND_PRINT("[Error converting time]"); - return; + if (date_flag == WITH_DATE) { + timestr = nd_format_time(timebuf, sizeof(timebuf), + "%Y-%m-%d %H:%M:%S", tm); + } else { + timestr = nd_format_time(timebuf, sizeof(timebuf), + "%H:%M:%S", tm); } - if (date_flag == WITH_DATE) - strftime(timestr, sizeof(timestr), "%Y-%m-%d %H:%M:%S", tm); - else - strftime(timestr, sizeof(timestr), "%H:%M:%S", tm); ND_PRINT("%s", timestr); - ts_frac_print(ndo, usec); + ts_frac_print(ndo, tv); } /* * Print the timestamp - Unix timeval style, as SECS.FRAC. */ static void -ts_unix_print(netdissect_options *ndo, long sec, long usec) +ts_unix_print(netdissect_options *ndo, const struct timeval *tv) { - if ((unsigned)sec & 0x80000000) { - ND_PRINT("[Error converting time]"); + if (tv->tv_sec < 0) { + ND_PRINT("[timestamp overflow]"); return; } - ND_PRINT("%u", (unsigned)sec); - ts_frac_print(ndo, usec); + ND_PRINT("%" PRId64, (int64_t)tv->tv_sec); + ts_frac_print(ndo, tv); } /* @@ -312,8 +318,7 @@ ts_print(netdissect_options *ndo, switch (ndo->ndo_tflag) { case 0: /* Default */ - ts_date_hmsfrac_print(ndo, tvp->tv_sec, tvp->tv_usec, - WITHOUT_DATE, LOCAL_TIME); + ts_date_hmsfrac_print(ndo, tvp, WITHOUT_DATE, LOCAL_TIME); ND_PRINT(" "); break; @@ -321,7 +326,7 @@ ts_print(netdissect_options *ndo, break; case 2: /* Unix timeval style */ - ts_unix_print(ndo, tvp->tv_sec, tvp->tv_usec); + ts_unix_print(ndo, tvp); ND_PRINT(" "); break; @@ -352,8 +357,7 @@ ts_print(netdissect_options *ndo, netdissect_timevalsub(tvp, &tv_ref, &tv_result, nano_prec); ND_PRINT((negative_offset ? "-" : " ")); - ts_date_hmsfrac_print(ndo, tv_result.tv_sec, tv_result.tv_usec, - WITHOUT_DATE, UTC_TIME); + ts_date_hmsfrac_print(ndo, &tv_result, WITHOUT_DATE, UTC_TIME); ND_PRINT(" "); if (ndo->ndo_tflag == 3) @@ -361,8 +365,7 @@ ts_print(netdissect_options *ndo, break; case 4: /* Date + Default */ - ts_date_hmsfrac_print(ndo, tvp->tv_sec, tvp->tv_usec, - WITH_DATE, LOCAL_TIME); + ts_date_hmsfrac_print(ndo, tvp, WITH_DATE, LOCAL_TIME); ND_PRINT(" "); break; } @@ -432,6 +435,26 @@ signed_relts_print(netdissect_options *ndo, unsigned_relts_print(ndo, secs); } +/* + * Format a struct tm with strftime(). + * If the pointer to the struct tm is null, that means that the + * routine to convert a time_t to a struct tm failed; the localtime() + * and gmtime() in the Microsoft Visual Studio C library will fail, + * returning null, if the value is before the UNIX Epoch. + */ +const char * +nd_format_time(char *buf, size_t bufsize, const char *format, + const struct tm *timeptr) +{ + if (timeptr != NULL) { + if (strftime(buf, bufsize, format, timeptr) != 0) + return (buf); + else + return ("[nd_format_time() buffer is too small]"); + } else + return ("[localtime() or gmtime() couldn't convert the date and time]"); +} + /* Print the truncated string */ void nd_print_trunc(netdissect_options *ndo) { @@ -466,28 +489,23 @@ void nd_print_invalid(netdissect_options *ndo) int print_unknown_data(netdissect_options *ndo, const u_char *cp, - const char *ident, u_int len) + const char *indent, u_int len) { - u_int len_to_print; - - len_to_print = len; if (!ND_TTEST_LEN(cp, 0)) { - ND_PRINT("%sDissector error: print_unknown_data called with pointer past end of packet", - ident); + ND_PRINT("%sDissector error: %s() called with pointer past end of packet", + indent, __func__); return(0); } - if (ND_BYTES_AVAILABLE_AFTER(cp) < len_to_print) - len_to_print = ND_BYTES_AVAILABLE_AFTER(cp); - hex_print(ndo, ident, cp, len_to_print); + hex_print(ndo, indent, cp, ND_MIN(len, ND_BYTES_AVAILABLE_AFTER(cp))); return(1); /* everything is ok */ } /* * Convert a token value to a string; use "fmt" if not found. */ -const char * +static const char * tok2strbuf(const struct tok *lp, const char *fmt, - u_int v, char *buf, size_t bufsize) + const u_int v, char *buf, const size_t bufsize) { if (lp != NULL) { while (lp->s != NULL) { @@ -509,8 +527,7 @@ tok2strbuf(const struct tok *lp, const char *fmt, * in round-robin fashion. */ const char * -tok2str(const struct tok *lp, const char *fmt, - u_int v) +tok2str(const struct tok *lp, const char *fmt, const u_int v) { static char buf[4][TOKBUFSIZE]; static int idx = 0; @@ -531,7 +548,7 @@ tok2str(const struct tok *lp, const char *fmt, */ static char * bittok2str_internal(const struct tok *lp, const char *fmt, - u_int v, const char *sep) + const u_int v, const char *sep) { static char buf[1024+1]; /* our string buffer */ char *bufp = buf; @@ -571,8 +588,7 @@ bittok2str_internal(const struct tok *lp, const char *fmt, * this is useful for parsing bitfields, the output strings are not separated. */ char * -bittok2str_nosep(const struct tok *lp, const char *fmt, - u_int v) +bittok2str_nosep(const struct tok *lp, const char *fmt, const u_int v) { return (bittok2str_internal(lp, fmt, v, "")); } @@ -582,8 +598,7 @@ bittok2str_nosep(const struct tok *lp, const char *fmt, * this is useful for parsing bitfields, the output strings are comma separated. */ char * -bittok2str(const struct tok *lp, const char *fmt, - u_int v) +bittok2str(const struct tok *lp, const char *fmt, const u_int v) { return (bittok2str_internal(lp, fmt, v, ", ")); } @@ -595,8 +610,7 @@ bittok2str(const struct tok *lp, const char *fmt, * correct for bounds-checking. */ const char * -tok2strary_internal(const char **lp, int n, const char *fmt, - int v) +tok2strary_internal(const char **lp, int n, const char *fmt, const int v) { static char buf[TOKBUFSIZE]; @@ -629,9 +643,9 @@ uint2tokary_internal(const struct uint_tokary dict[], const size_t size, */ int -mask2plen(uint32_t mask) +mask2plen(const uint32_t mask) { - uint32_t bitmasks[33] = { + const uint32_t bitmasks[33] = { 0x00000000, 0x80000000, 0xc0000000, 0xe0000000, 0xf0000000, 0xf8000000, 0xfc000000, 0xfe000000, 0xff000000, @@ -695,9 +709,9 @@ mask62plen(const u_char *mask) * either a space character at the beginning of the line (this * includes a blank line) or no more tokens remaining on the line. */ -static int +static u_int fetch_token(netdissect_options *ndo, const u_char *pptr, u_int idx, u_int len, - u_char *tbuf, size_t tbuflen) + u_char *tbuf, size_t tbuflen) { size_t toklen = 0; u_char c; @@ -821,11 +835,10 @@ print_txt_line(netdissect_options *ndo, const char *prefix, /* * All printable ASCII, but no line ending after that point - * in the buffer; treat this as if it were truncated. + * in the buffer. */ linelen = idx - startidx; ND_PRINT("%s%.*s", prefix, (int)linelen, pptr + startidx); - nd_print_trunc(ndo); return (0); print: @@ -944,7 +957,7 @@ txtproto_print(netdissect_options *ndo, const u_char *pptr, u_int len, (defined(__s390__) || defined(__s390x__) || defined(__zarch__)) || \ defined(__vax__) /* - * The procesor natively handles unaligned loads, so just use memcpy() + * The processor natively handles unaligned loads, so just use memcpy() * and memcmp(), to enable those optimizations. * * XXX - are those all the x86 tests we need?