*/
/*
* @(#)Copyright (c) 1994, Simon J. Gerraty.
- *
+ *
* This is free software. It comes with NO WARRANTY.
- * Permission to use, modify and distribute this source code
+ * Permission to use, modify and distribute this source code
* is granted subject to the following conditions.
- * 1/ that the above copyright notice and this notice
+ * 1/ that the above copyright notice and this notice
* are preserved in all copies.
*/
#endif
#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-telnet.c,v 1.15 2001-06-25 23:03:57 itojun Exp $";
+static const char rcsid[] _U_ =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-telnet.c,v 1.24 2003-12-29 11:05:10 hannes Exp $";
#endif
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <ctype.h>
-
-#include <netinet/in.h>
-
-#define TELCMDS
-#define TELOPTS
-#include <arpa/telnet.h>
+#include <tcpdump-stdinc.h>
#include <stdio.h>
#include <stdlib.h>
-#include <unistd.h>
#include <string.h>
#include "interface.h"
#include "addrtoname.h"
-#ifndef TELCMD_FIRST
-# define TELCMD_FIRST SE
-#endif
+#define TELCMDS
+#define TELOPTS
+#include "telnet.h"
+
+/* normal */
+static const char *cmds[] = {
+ "IS", "SEND", "INFO",
+};
+
+/* 37: Authentication */
+static const char *authcmd[] = {
+ "IS", "SEND", "REPLY", "NAME",
+};
+static const char *authtype[] = {
+ "NULL", "KERBEROS_V4", "KERBEROS_V5", "SPX", "MINK",
+ "SRP", "RSA", "SSL", NULL, NULL,
+ "LOKI", "SSA", "KEA_SJ", "KEA_SJ_INTEG", "DSS",
+ "NTLM",
+};
-/* sp points to IAB byte */
+/* 38: Encryption */
+static const char *enccmd[] = {
+ "IS", "SUPPORT", "REPLY", "START", "END",
+ "REQUEST-START", "REQUEST-END", "END_KEYID", "DEC_KEYID",
+};
+static const char *enctype[] = {
+ "NULL", "DES_CFB64", "DES_OFB64", "DES3_CFB64", "DES3_OFB64",
+ NULL, "CAST5_40_CFB64", "CAST5_40_OFB64", "CAST128_CFB64", "CAST128_OFB64",
+};
+
+#define STR_OR_ID(x, tab) \
+ (((x) < sizeof(tab)/sizeof(tab[0]) && tab[(x)]) ? tab[(x)] : numstr(x))
+
+static char *
+numstr(int x)
+{
+ static char buf[20];
+
+ snprintf(buf, sizeof(buf), "%#x", x);
+ return buf;
+}
+
+/* sp points to IAC byte */
static int
telnet_parse(const u_char *sp, u_int length, int print)
{
- int i, c, x;
+ int i, x;
+ u_int c;
const u_char *osp, *p;
-#define PEEK(c, sp, length) \
- do { \
- if (length < 1) \
- goto trunc; \
- c = *sp; \
- } while (0)
#define FETCH(c, sp, length) \
do { \
- PEEK((c), (sp), (length)); \
- sp++; \
+ if (length < 1) \
+ goto pktend; \
+ TCHECK(*sp); \
+ c = *sp++; \
length--; \
} while (0)
FETCH(c, sp, length);
if (c != IAC)
- goto trunc;
+ goto pktend;
FETCH(c, sp, length);
if (c == IAC) { /* <IAC><IAC>! */
if (print)
i = c - TELCMD_FIRST;
if (i < 0 || i > IAC - TELCMD_FIRST)
- goto trunc;
+ goto pktend;
switch (c) {
case DONT:
break;
/* IAC SB .... IAC SE */
p = sp;
- while (length > p + 1 - sp) {
+ while (length > (u_int)(p + 1 - sp)) {
if (p[0] == IAC && p[1] == SE)
break;
p++;
}
if (*p != IAC)
- goto trunc;
-
- PEEK(c, sp, length);
- if (c) {
- while (p > sp) {
- FETCH(x, sp, length);
- if (print)
- (void)printf(" %#x", x);
- }
- } else {
+ goto pktend;
+
+ switch (x) {
+ case TELOPT_AUTHENTICATION:
+ if (p <= sp)
+ break;
+ FETCH(c, sp, length);
+ if (print)
+ (void)printf(" %s", STR_OR_ID(c, authcmd));
+ if (p <= sp)
+ break;
+ FETCH(c, sp, length);
+ if (print)
+ (void)printf(" %s", STR_OR_ID(c, authtype));
+ break;
+ case TELOPT_ENCRYPT:
+ if (p <= sp)
+ break;
FETCH(c, sp, length);
if (print)
- (void)printf(" IS '");
- while (p > sp) {
- FETCH(x, sp, length);
- if (print)
- safeputchar(x);
- }
- /* terminating IAC SE */
+ (void)printf(" %s", STR_OR_ID(c, enccmd));
+ if (p <= sp)
+ break;
+ FETCH(c, sp, length);
+ if (print)
+ (void)printf(" %s", STR_OR_ID(c, enctype));
+ break;
+ default:
+ if (p <= sp)
+ break;
+ FETCH(c, sp, length);
if (print)
- (void)printf("'");
+ (void)printf(" %s", STR_OR_ID(c, cmds));
+ break;
+ }
+ while (p > sp) {
+ FETCH(x, sp, length);
+ if (print)
+ (void)printf(" %#x", x);
}
/* terminating IAC SE */
if (print)
return sp - osp;
trunc:
+ (void)printf("[|telnet]");
+pktend:
return -1;
-#undef PEEK
#undef FETCH
}
int l;
osp = sp;
-
+
while (length > 0 && *sp == IAC) {
l = telnet_parse(sp, length, 0);
if (l < 0)
if (Xflag && 2 < vflag) {
if (first)
printf("\nTelnet:");
- hex_print_with_offset(sp, l, sp - osp);
+ hex_print_with_offset("\n", sp, l, sp - osp);
if (l > 8)
printf("\n\t\t\t\t");
else
projects / tcpdump / blobdiff