* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/util.c,v 1.77 2002-08-01 08:53:37 risso Exp $ (LBL)";
-#endif
-
+#define NETDISSECT_REWORKED
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/stat.h>
-#include <errno.h>
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
-#include <pcap.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
-#ifdef TIME_WITH_SYS_TIME
-#include <time.h>
-#endif
#include "interface.h"
/*
- * Print out a filename (or other ascii string).
+ * Print out a null-terminated filename (or other ascii string).
* If ep is NULL, assume no truncation check is needed.
* Return true if truncated.
*/
int
-fn_print(register const u_char *s, register const u_char *ep)
+fn_print(netdissect_options *ndo,
+ register const u_char *s, register const u_char *ep)
{
register int ret;
register u_char c;
ret = 0;
break;
}
- if (!isascii(c)) {
- c = toascii(c);
- putchar('M');
- putchar('-');
+ if (!ND_ISASCII(c)) {
+ c = ND_TOASCII(c);
+ ND_PRINT((ndo, "M-"));
}
- if (!isprint(c)) {
+ if (!ND_ISPRINT(c)) {
c ^= 0x40; /* DEL to ?, others to alpha */
- putchar('^');
+ ND_PRINT((ndo, "^"));
}
- putchar(c);
+ ND_PRINT((ndo, "%c", c));
}
return(ret);
}
* Return true if truncated.
*/
int
-fn_printn(register const u_char *s, register u_int n,
- register const u_char *ep)
+fn_printn(netdissect_options *ndo,
+ register const u_char *s, register u_int n, register const u_char *ep)
+{
+ register u_char c;
+
+ while (n > 0 && (ep == NULL || s < ep)) {
+ n--;
+ c = *s++;
+ if (!ND_ISASCII(c)) {
+ c = ND_TOASCII(c);
+ ND_PRINT((ndo, "M-"));
+ }
+ if (!ND_ISPRINT(c)) {
+ c ^= 0x40; /* DEL to ?, others to alpha */
+ ND_PRINT((ndo, "^"));
+ }
+ ND_PRINT((ndo, "%c", c));
+ }
+ return (n == 0) ? 0 : 1;
+}
+
+/*
+ * Print out a null-padded filename (or other ascii string).
+ * If ep is NULL, assume no truncation check is needed.
+ * Return true if truncated.
+ */
+int
+fn_printzp(netdissect_options *ndo,
+ register const u_char *s, register u_int n,
+ register const u_char *ep)
{
register int ret;
register u_char c;
ret = 1; /* assume truncated */
- while (ep == NULL || s < ep) {
- if (n-- <= 0) {
+ while (n > 0 && (ep == NULL || s < ep)) {
+ n--;
+ c = *s++;
+ if (c == '\0') {
ret = 0;
break;
}
- c = *s++;
- if (!isascii(c)) {
- c = toascii(c);
- putchar('M');
- putchar('-');
+ if (!ND_ISASCII(c)) {
+ c = ND_TOASCII(c);
+ ND_PRINT((ndo, "M-"));
}
- if (!isprint(c)) {
+ if (!ND_ISPRINT(c)) {
c ^= 0x40; /* DEL to ?, others to alpha */
- putchar('^');
+ ND_PRINT((ndo, "^"));
}
- putchar(c);
+ ND_PRINT((ndo, "%c", c));
}
- return(ret);
+ return (n == 0) ? 0 : ret;
+}
+
+/*
+ * Format the timestamp
+ */
+static char *
+ts_format(netdissect_options *ndo, int sec, int usec)
+{
+ static char buf[sizeof("00:00:00.000000000")];
+ const char *format;
+
+#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
+ switch (ndo->ndo_tstamp_precision) {
+
+ case PCAP_TSTAMP_PRECISION_MICRO:
+ format = "%02d:%02d:%02d.%06u";
+ break;
+
+ case PCAP_TSTAMP_PRECISION_NANO:
+ format = "%02d:%02d:%02d.%09u";
+ break;
+
+ default:
+ format = "%02d:%02d:%02d.{unknown precision}";
+ break;
+ }
+#else
+ format = "%02d:%02d:%02d.%06u";
+#endif
+
+ snprintf(buf, sizeof(buf), format,
+ sec / 3600, (sec % 3600) / 60, sec % 60, usec);
+
+ return buf;
}
/*
* Print the timestamp
*/
void
-ts_print(register const struct timeval *tvp)
+ts_print(netdissect_options *ndo,
+ register const struct timeval *tvp)
{
register int s;
struct tm *tm;
time_t Time;
static unsigned b_sec;
static unsigned b_usec;
+ int d_usec;
+ int d_sec;
- switch(tflag) {
- case 1: /* Default */
+ switch (ndo->ndo_tflag) {
+
+ case 0: /* Default */
s = (tvp->tv_sec + thiszone) % 86400;
- (void)printf("%02d:%02d:%02d.%06u ",
- s / 3600, (s % 3600) / 60, s % 60,
- (unsigned)tvp->tv_usec);
+ ND_PRINT((ndo, "%s ", ts_format(ndo, s, tvp->tv_usec)));
+ break;
+
+ case 1: /* No time stamp */
break;
- case -1: /* Unix timeval style */
- (void)printf("%u.%06u ",
+
+ case 2: /* Unix timeval style */
+ ND_PRINT((ndo, "%u.%06u ",
(unsigned)tvp->tv_sec,
- (unsigned)tvp->tv_usec);
+ (unsigned)tvp->tv_usec));
break;
- case -2:
+
+ case 3: /* Microseconds since previous packet */
+ case 5: /* Microseconds since first packet */
if (b_sec == 0) {
- printf("000000 ");
- } else {
- int d_usec = tvp->tv_usec - b_usec;
- int d_sec = tvp->tv_sec - b_sec;
-
- while (d_usec < 0) {
- d_usec += 1000000;
- d_sec--;
- }
- if (d_sec)
- printf("%d. ", d_sec);
- printf("%06d ", d_usec);
- }
- b_sec = tvp->tv_sec;
- b_usec = tvp->tv_usec;
+ /* init timestamp for first packet */
+ b_usec = tvp->tv_usec;
+ b_sec = tvp->tv_sec;
+ }
+
+ d_usec = tvp->tv_usec - b_usec;
+ d_sec = tvp->tv_sec - b_sec;
+
+ while (d_usec < 0) {
+ d_usec += 1000000;
+ d_sec--;
+ }
+
+ ND_PRINT((ndo, "%s ", ts_format(ndo, d_sec, d_usec)));
+
+ if (ndo->ndo_tflag == 3) { /* set timestamp for last packet */
+ b_sec = tvp->tv_sec;
+ b_usec = tvp->tv_usec;
+ }
break;
- case -3: /* Default + Date*/
+
+ case 4: /* Default + Date*/
s = (tvp->tv_sec + thiszone) % 86400;
Time = (tvp->tv_sec + thiszone) - s;
- tm = gmtime (&Time);
- (void)printf("%02d/%02d/%04d %02d:%02d:%02d.%06u ",
- tm->tm_mon+1, tm->tm_mday,
- tm->tm_year+1900,
- s / 3600, (s % 3600) / 60,
- s % 60, (unsigned)tvp->tv_usec);
+ tm = gmtime (&Time);
+ if (!tm)
+ ND_PRINT((ndo, "Date fail "));
+ else
+ ND_PRINT((ndo, "%04d-%02d-%02d %s ",
+ tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday,
+ ts_format(ndo, s, tvp->tv_usec)));
break;
}
}
* is represented as 1y1w1d1h1m1s.
*/
void
-relts_print(int secs)
+relts_print(netdissect_options *ndo,
+ int secs)
{
static const char *lengths[] = {"y", "w", "d", "h", "m", "s"};
static const int seconds[] = {31536000, 604800, 86400, 3600, 60, 1};
const int *s = seconds;
if (secs == 0) {
- (void)printf("0s");
+ ND_PRINT((ndo, "0s"));
return;
}
if (secs < 0) {
- (void)printf("-");
+ ND_PRINT((ndo, "-"));
secs = -secs;
}
while (secs > 0) {
if (secs >= *s) {
- (void)printf("%d%s", secs / *s, *l);
+ ND_PRINT((ndo, "%d%s", secs / *s, *l));
secs -= (secs / *s) * *s;
}
s++;
*/
int
-print_unknown_data(const u_char *cp,const char *lf,int len)
+print_unknown_data(netdissect_options *ndo, const u_char *cp,const char *ident,int len)
{
- int i;
-
- printf("%s0x0000: ",lf);
- for(i=0;i<len;i++) {
- if (!TTEST2(*(cp+i), 1)) {
- printf("%spacket exceeded snapshot",lf);
- return(0);
- }
- printf("%02x",*(cp+i));
- if (i%2)
- printf(" ");
- if (i/16!=(i+1)/16) {
- if (i<(len-1))
- printf("%s0x%04x: ",lf,i);
- }
+ if (len < 0) {
+ ND_PRINT((ndo,"%sDissector error: print_unknown_data called with negative length",
+ ident));
+ return(0);
}
+ if (ndo->ndo_snapend - cp < len)
+ len = ndo->ndo_snapend - cp;
+ if (len < 0) {
+ ND_PRINT((ndo,"%sDissector error: print_unknown_data called with pointer past end of packet",
+ ident));
+ return(0);
+ }
+ hex_print(ndo, ident,cp,len);
return(1); /* everything is ok */
}
+/*
+ * Convert a token value to a string; use "fmt" if not found.
+ */
+const char *
+tok2strbuf(register const struct tok *lp, register const char *fmt,
+ register u_int v, char *buf, size_t bufsize)
+{
+ if (lp != NULL) {
+ while (lp->s != NULL) {
+ if (lp->v == v)
+ return (lp->s);
+ ++lp;
+ }
+ }
+ if (fmt == NULL)
+ fmt = "#%d";
+
+ (void)snprintf(buf, bufsize, fmt, v);
+ return (const char *)buf;
+}
+
/*
* Convert a token value to a string; use "fmt" if not found.
*/
tok2str(register const struct tok *lp, register const char *fmt,
register int v)
{
- static char buf[128];
+ static char buf[4][128];
+ static int idx = 0;
+ char *ret;
- while (lp->s != NULL) {
- if (lp->v == v)
- return (lp->s);
- ++lp;
+ ret = buf[idx];
+ idx = (idx+1) & 3;
+ return tok2strbuf(lp, fmt, v, ret, sizeof(buf[0]));
+}
+
+/*
+ * Convert a bit token value to a string; use "fmt" if not found.
+ * this is useful for parsing bitfields, the output strings are seperated
+ * if the s field is positive.
+ */
+static char *
+bittok2str_internal(register const struct tok *lp, register const char *fmt,
+ register int v, register int sep)
+{
+ static char buf[256]; /* our stringbuffer */
+ int buflen=0;
+ register int rotbit; /* this is the bit we rotate through all bitpositions */
+ register 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 */
+ buflen+=snprintf(buf+buflen, sizeof(buf)-buflen, "%s%s",
+ sepstr, lp->s);
+ sepstr = sep ? ", " : "";
+ break;
+ }
+ rotbit=rotbit<<1; /* no match - lets shift and try again */
+ }
+ lp++;
}
- if (fmt == NULL)
- fmt = "#%d";
- (void)snprintf(buf, sizeof(buf), fmt, v);
- return (buf);
+
+ if (buflen == 0)
+ /* bummer - lets print the "unknown" message as advised in the fmt string if we got one */
+ (void)snprintf(buf, sizeof(buf), fmt == NULL ? "#%d" : fmt, v);
+ return (buf);
+}
+
+/*
+ * Convert a bit token value to a string; use "fmt" if not found.
+ * this is useful for parsing bitfields, the output strings are not seperated.
+ */
+char *
+bittok2str_nosep(register const struct tok *lp, register const char *fmt,
+ register int v)
+{
+ return (bittok2str_internal(lp, fmt, v, 0));
+}
+
+/*
+ * Convert a bit token value to a string; use "fmt" if not found.
+ * this is useful for parsing bitfields, the output strings are comma seperated.
+ */
+char *
+bittok2str(register const struct tok *lp, register const char *fmt,
+ register int v)
+{
+ return (bittok2str_internal(lp, fmt, v, 1));
}
/*
return (buf);
}
+/*
+ * Convert a 32-bit netmask to prefixlen if possible
+ * the function returns the prefix-len; if plen == -1
+ * then conversion was not possible;
+ */
+
+int
+mask2plen(uint32_t mask)
+{
+ uint32_t bitmasks[33] = {
+ 0x00000000,
+ 0x80000000, 0xc0000000, 0xe0000000, 0xf0000000,
+ 0xf8000000, 0xfc000000, 0xfe000000, 0xff000000,
+ 0xff800000, 0xffc00000, 0xffe00000, 0xfff00000,
+ 0xfff80000, 0xfffc0000, 0xfffe0000, 0xffff0000,
+ 0xffff8000, 0xffffc000, 0xffffe000, 0xfffff000,
+ 0xfffff800, 0xfffffc00, 0xfffffe00, 0xffffff00,
+ 0xffffff80, 0xffffffc0, 0xffffffe0, 0xfffffff0,
+ 0xfffffff8, 0xfffffffc, 0xfffffffe, 0xffffffff
+ };
+ int prefix_len = 32;
+
+ /* let's see if we can transform the mask into a prefixlen */
+ while (prefix_len >= 0) {
+ if (bitmasks[prefix_len] == mask)
+ break;
+ prefix_len--;
+ }
+ return (prefix_len);
+}
+
+#ifdef INET6
+int
+mask62plen(const u_char *mask)
+{
+ u_char bitmasks[9] = {
+ 0x00,
+ 0x80, 0xc0, 0xe0, 0xf0,
+ 0xf8, 0xfc, 0xfe, 0xff
+ };
+ int byte;
+ int cidr_len = 0;
+
+ for (byte = 0; byte < 16; byte++) {
+ u_int bits;
+
+ for (bits = 0; bits < (sizeof (bitmasks) / sizeof (bitmasks[0])); bits++) {
+ if (mask[byte] == bitmasks[bits]) {
+ cidr_len += bits;
+ break;
+ }
+ }
+
+ if (mask[byte] != 0xff)
+ break;
+ }
+ return (cidr_len);
+}
+#endif /* INET6 */
+
/* VARARGS */
void
error(const char *fmt, ...)
return buf;
}
+/*
+ * On Windows, we need to open the file in binary mode, so that
+ * we get all the bytes specified by the size we get from "fstat()".
+ * On UNIX, that's not necessary. O_BINARY is defined on Windows;
+ * we define it as 0 if it's not defined, so it does nothing.
+ */
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
char *
read_infile(char *fname)
{
- register int fd, cc;
+ register int i, fd, cc;
register char *cp;
struct stat buf;
- fd = open(fname, O_RDONLY);
+ fd = open(fname, O_RDONLY|O_BINARY);
if (fd < 0)
error("can't open %s: %s", fname, pcap_strerror(errno));
if (cc < 0)
error("read %s: %s", fname, pcap_strerror(errno));
if (cc != buf.st_size)
-#ifndef WIN32
error("short read %s (%d != %d)", fname, cc, (int)buf.st_size);
-#else
-/* Windows seems not to like the final \xa character */
- {
- char *pdest;
- pdest=strchr( cp, '\xa');
- *pdest=0;
- }
-#endif WIN32
- cp[(int)buf.st_size] = '\0';
+ close(fd);
+ /* replace "# comment" with spaces */
+ for (i = 0; i < cc; i++) {
+ if (cp[i] == '#')
+ while (i < cc && cp[i] != '\n')
+ cp[i++] = ' ';
+ }
+ cp[cc] = '\0';
return (cp);
}
void
-safeputs(const char *s)
+safeputs(netdissect_options *ndo,
+ const u_char *s, const u_int maxlen)
{
- while (*s) {
- safeputchar(*s);
+ u_int idx = 0;
+
+ while (*s && idx < maxlen) {
+ safeputchar(ndo, *s);
+ idx++;
s++;
}
}
void
-safeputchar(int c)
+safeputchar(netdissect_options *ndo,
+ const u_char c)
{
- unsigned char ch;
+ ND_PRINT((ndo, (c < 0x80 && ND_ISPRINT(c)) ? "%c" : "\\0x%02x", c));
+}
- ch = (unsigned char)(c & 0xff);
- if (ch < 0x80 && isprint(ch))
- printf("%c", ch);
- else
- printf("\\%03o", ch);
+#ifdef LBL_ALIGN
+/*
+ * Some compilers try to optimize memcpy(), using the alignment constraint
+ * on the argument pointer type. by using this function, we try to avoid the
+ * optimization.
+ */
+void
+unaligned_memcpy(void *p, const void *q, size_t l)
+{
+ memcpy(p, q, l);
}
+
+/* As with memcpy(), so with memcmp(). */
+int
+unaligned_memcmp(const void *p, const void *q, size_t l)
+{
+ return (memcmp(p, q, l));
+}
+#endif
projects / tcpdump / blobdiff