Print IP src and dst even when udp is truncated.

[tcpdump] / print-tcp.c

diff --git a/print-tcp.c b/print-tcp.c
index 532d7bd8b0e588fdcea2ec8b773ace7bcd86ec77..895be3bf6fee27e457ae31eade0052ef782e8b72 100644 (file)
--- a/print-tcp.c
+++ b/print-tcp.c
@@ -21,7 +21,11 @@
 
 #ifndef lint
 static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-tcp.c,v 1.58 1999-11-21 03:50:02 assar Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/tcpdump/print-tcp.c,v 1.61 1999-11-22 04:27:10 fenner Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
 #endif
 
 #include <sys/param.h>
@@ -104,6 +108,8 @@ struct tcp_seq_hash {
 static struct tcp_seq_hash tcp_seq_hash[TSEQ_HASHSIZE];
 
 
+#define NETBIOS_SSN_PORT 139
+
 void
 tcp_print(register const u_char *bp, register u_int length,
          register const u_char *bp2)
@@ -129,18 +135,15 @@ tcp_print(register const u_char *bp, register u_int length,
                ip6 = NULL;
 #endif /*INET6*/
        ch = '\0';
-       TCHECK(*tp);
-       if (length < sizeof(*tp)) {
-               (void)printf("truncated-tcp %d", length);
+       if (!TTEST(tp->th_dport)) {
+               (void)printf("%s > %s: [|tcp]",
+                       ipaddr_string(&ip->ip_src),
+                       ipaddr_string(&ip->ip_dst));
                return;
        }
 
        sport = ntohs(tp->th_sport);
        dport = ntohs(tp->th_dport);
-       seq = ntohl(tp->th_seq);
-       ack = ntohl(tp->th_ack);
-       win = ntohs(tp->th_win);
-       urp = ntohs(tp->th_urp);
 
 #ifdef INET6
        if (ip6) {
@@ -169,6 +172,13 @@ tcp_print(register const u_char *bp, register u_int length,
                }
        }
 
+       TCHECK(*tp);
+
+       seq = ntohl(tp->th_seq);
+       ack = ntohl(tp->th_ack);
+       win = ntohs(tp->th_win);
+       urp = ntohs(tp->th_urp);
+
        if (qflag) {
                (void)printf("tcp %d", length - tp->th_off * 4);
                return;
@@ -305,7 +315,7 @@ tcp_print(register const u_char *bp, register u_int length,
                return;
        }
        length -= hlen;
-       if (length > 0 || flags & (TH_SYN | TH_FIN | TH_RST))
+       if (vflag > 1 || length > 0 || flags & (TH_SYN | TH_FIN | TH_RST))
                (void)printf(" %u:%u(%d)", seq, seq + length, length);
        if (flags & TH_ACK)
                (void)printf(" ack %u", ack);
@@ -479,6 +489,8 @@ tcp_print(register const u_char *bp, register u_int length,
        bp += (tp->th_off * 4);
        if (sport == 179 || dport == 179)
                bgp_print(bp, length);
+       if (sport == NETBIOS_SSN_PORT || dport == NETBIOS_SSN_PORT)
+               nbt_tcp_print(bp, length);
        return;
 bad:
        fputs("[bad opt]", stdout);