* FOR A PARTICULAR PURPOSE.
*/
-#ifdef HAVE_CONFIG_H
#include <config.h>
-#endif
#include "netdissect-stdinc.h"
#include <sys/stat.h>
-#ifdef HAVE_FCNTL_H
-#include <fcntl.h>
-#endif
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
}
}
-/*
- * 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
}
/*
- * Print out a null-padded 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 after n bytes or before the null char,
+ * 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.
*/
-int
-nd_printzp(netdissect_options *ndo,
- const u_char *s, u_int n,
- const u_char *ep)
+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.
+ * Stop if truncated (via GET_U_1/longjmp) or after n bytes or before
+ * the null char, whichever occurs first.
+ * The suffix comes from: j:longJmp, n:after N bytes, p:null-Padded.
+ */
+void
+nd_printjnp(netdissect_options *ndo, const u_char *s, u_int n)
{
- int ret;
u_char c;
- ret = 1; /* assume truncated */
- while (n > 0 && (ep == NULL || s < ep)) {
- n--;
+ while (n != 0) {
c = GET_U_1(s);
- s++;
- if (c == '\0') {
- ret = 0;
+ if (c == '\0')
break;
- }
fn_print_char(ndo, c);
+ n--;
+ s++;
}
- return (n == 0) ? 0 : ret;
}
/*
* 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:
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
}
* 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);
}
/*
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;
break;
case 2: /* Unix timeval style */
- ts_unix_print(ndo, tvp->tv_sec, tvp->tv_usec);
+ ts_unix_print(ndo, tvp);
ND_PRINT(" ");
break;
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)
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;
}
ND_PRINT("0s");
return;
}
- while (secs > 0) {
+ while (secs != 0) {
if (secs >= *s) {
ND_PRINT("%u%s", secs / *s, *l);
secs -= (secs / *s) * *s;
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)
{
ND_PRINT(" (invalid)");
}
+/*
+ * Print a sequence of bytes, separated by a single space.
+ * Stop if truncated (via GET_U_1/longjmp) or after n bytes,
+ * whichever is first.
+ */
+void
+nd_print_bytes_hex(netdissect_options *ndo, const u_char *cp, u_int n)
+{
+ while (n > 0) {
+ ND_PRINT("%02x", GET_U_1(cp));
+ n--;
+ cp++;
+ if (n > 0)
+ ND_PRINT(" ");
+ }
+}
+
/*
* this is a generic routine for printing unknown data;
* we pass on the linefeed plus indentation string to
*/
int
-print_unknown_data(netdissect_options *ndo, const u_char *cp,const char *ident,int len)
+print_unknown_data(netdissect_options *ndo, const u_char *cp,
+ const char *indent, u_int len)
{
- if (len < 0) {
- ND_PRINT("%sDissector error: print_unknown_data called with negative length",
- ident);
+ if (!ND_TTEST_LEN(cp, 0)) {
+ ND_PRINT("%sDissector error: %s() called with pointer past end of packet",
+ indent, __func__);
return(0);
}
- if (ndo->ndo_snapend - cp < len)
- len = ndo->ndo_snapend - cp;
- if (len < 0) {
- ND_PRINT("%sDissector error: print_unknown_data called with pointer past end of packet",
- ident);
- return(0);
- }
- hex_print(ndo, ident,cp,len);
+ 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) {
* 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;
* Convert a bit token value to a string; use "fmt" if not found.
* this is useful for parsing bitfields, the output strings are separated
* if the s field is positive.
+ *
+ * A token matches iff it has one or more bits set and every bit that is set
+ * in the token is set in v. Consequently, a 0 token never matches.
*/
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;
size_t space_left = sizeof(buf), string_size;
- u_int rotbit; /* this is the bit we rotate through all bitpositions */
- u_int tokval;
const char * sepstr = "";
- while (lp != NULL && lp->s != NULL) {
- tokval=lp->v; /* load our first value */
- rotbit=1;
- while (rotbit != 0) {
- /*
- * lets AND the rotating bit with our token value
- * and see if we have got a match
- */
- if (tokval == (v&rotbit)) {
- /* ok we have found something */
- if (space_left <= 1)
- return (buf); /* only enough room left for NUL, if that */
- string_size = strlcpy(bufp, sepstr, space_left);
- if (string_size >= space_left)
- return (buf); /* we ran out of room */
- bufp += string_size;
- space_left -= string_size;
- if (space_left <= 1)
- return (buf); /* only enough room left for NUL, if that */
- string_size = strlcpy(bufp, lp->s, space_left);
- if (string_size >= space_left)
- return (buf); /* we ran out of room */
- bufp += string_size;
- space_left -= string_size;
- sepstr = sep;
- break;
- }
- rotbit=rotbit<<1; /* no match - lets shift and try again */
+ while (lp != NULL && lp->s != NULL) {
+ if (lp->v && (v & lp->v) == lp->v) {
+ /* ok we have found something */
+ if (space_left <= 1)
+ return (buf); /* only enough room left for NUL, if that */
+ string_size = strlcpy(bufp, sepstr, space_left);
+ if (string_size >= space_left)
+ return (buf); /* we ran out of room */
+ bufp += string_size;
+ space_left -= string_size;
+ if (space_left <= 1)
+ return (buf); /* only enough room left for NUL, if that */
+ string_size = strlcpy(bufp, lp->s, space_left);
+ if (string_size >= space_left)
+ return (buf); /* we ran out of room */
+ bufp += string_size;
+ space_left -= string_size;
+ sepstr = sep;
}
lp++;
- }
+ }
if (bufp == buf)
/* bummer - lets print the "unknown" message as advised in the fmt string if we got one */
* 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, ""));
}
* 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, ", "));
}
* 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];
return (buf);
}
+const struct tok *
+uint2tokary_internal(const struct uint_tokary dict[], const size_t size,
+ const u_int val)
+{
+ size_t i;
+ /* Try a direct lookup before the full scan. */
+ if (val < size && dict[val].uintval == val)
+ return dict[val].tokary; /* OK if NULL */
+ for (i = 0; i < size; i++)
+ if (dict[i].uintval == val)
+ return dict[i].tokary; /* OK if NULL */
+ return NULL;
+}
+
/*
* Convert a 32-bit netmask to prefixlen if possible
* the function returns the prefix-len; if plen == -1
*/
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,
* 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;
startidx = idx;
while (idx < len) {
- ND_TCHECK_1(pptr + idx);
c = GET_U_1(pptr + idx);
if (c == '\n') {
/*
/* not in this packet */
return (0);
}
- ND_TCHECK_1(pptr + idx + 1);
if (GET_U_1(pptr + idx + 1) == '\n') {
/*
* CR-LF; end of line.
/*
* All printable ASCII, but no line ending after that point
- * in the buffer; treat this as if it were truncated.
+ * in the buffer.
*/
-trunc:
linelen = idx - startidx;
ND_PRINT("%s%.*s", prefix, (int)linelen, pptr + startidx);
- nd_print_trunc(ndo);
return (0);
print:
(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?
projects / tcpdump / blobdiff