Bring in KAME IPv6 tcpdump. replaces esp/ah/isakmp decoder.

[tcpdump] / print-tcp.c

diff --git a/print-tcp.c b/print-tcp.c
index ffce8b956737710eeaaf86c333154692c2502d05..80335c1ddde11410697bfb8d1ae8ae10cec78160 100644 (file)
--- a/print-tcp.c
+++ b/print-tcp.c
@@ -21,17 +21,16 @@
 
 #ifndef lint
 static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-tcp.c,v 1.56 1999-10-17 21:37:16 mcr Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/tcpdump/print-tcp.c,v 1.57 1999-10-30 05:11:21 itojun Exp $ (LBL)";
 #endif
 
 #include <sys/param.h>
 #include <sys/time.h>
 
-#define __FAVOR_BSD
-
 #include <netinet/in.h>
 #include <netinet/in_systm.h>
 #include <netinet/ip.h>
+#include <netinet/ip_var.h>
 #include <netinet/tcp.h>
 
 #ifdef HAVE_MEMORY_H
@@ -42,6 +41,10 @@ static const char rcsid[] =
 #include <string.h>
 #include <unistd.h>
 
+#ifdef INET6
+#include <netinet/ip6.h>
+#endif
+
 #include "interface.h"
 #include "addrtoname.h"
 #include "extract.h"
@@ -76,8 +79,13 @@ static const char rcsid[] =
 #endif
 
 struct tha {
+#ifndef INET6
        struct in_addr src;
        struct in_addr dst;
+#else
+       struct in6_addr src;
+       struct in6_addr dst;
+#endif /*INET6*/
        u_int port;
 };
 
@@ -107,9 +115,18 @@ tcp_print(register const u_char *bp, register u_int length,
        register char ch;
        u_short sport, dport, win, urp;
        u_int32_t seq, ack;
+#ifdef INET6
+       register const struct ip6_hdr *ip6;
+#endif
 
        tp = (struct tcphdr *)bp;
        ip = (struct ip *)bp2;
+#ifdef INET6
+       if (ip->ip_v == 6)
+               ip6 = (struct ip6_hdr *)bp2;
+       else
+               ip6 = NULL;
+#endif /*INET6*/
        ch = '\0';
        TCHECK(*tp);
        if (length < sizeof(*tp)) {
@@ -124,15 +141,42 @@ tcp_print(register const u_char *bp, register u_int length,
        win = ntohs(tp->th_win);
        urp = ntohs(tp->th_urp);
 
-       (void)printf("%s.%s > %s.%s: ",
-               ipaddr_string(&ip->ip_src), tcpport_string(sport),
-               ipaddr_string(&ip->ip_dst), tcpport_string(dport));
+#ifdef INET6
+       if (ip6) {
+               if (ip6->ip6_nxt == IPPROTO_TCP) {
+                       (void)printf("%s.%s > %s.%s: ",
+                               ip6addr_string(&ip6->ip6_src),
+                               tcpport_string(sport),
+                               ip6addr_string(&ip6->ip6_dst),
+                               tcpport_string(dport));
+               } else {
+                       (void)printf("%s > %s: ",
+                               tcpport_string(sport), tcpport_string(dport));
+               }
+       } else
+#endif /*INET6*/
+       {
+               if (ip->ip_p == IPPROTO_TCP) {
+                       (void)printf("%s.%s > %s.%s: ",
+                               ipaddr_string(&ip->ip_src),
+                               tcpport_string(sport),
+                               ipaddr_string(&ip->ip_dst),
+                               tcpport_string(dport));
+               } else {
+                       (void)printf("%s > %s: ",
+                               tcpport_string(sport), tcpport_string(dport));
+               }
+       }
 
        if (qflag) {
                (void)printf("tcp %d", length - tp->th_off * 4);
                return;
        }
+#ifdef TH_ECN
+       if ((flags = tp->th_flags) & (TH_SYN|TH_FIN|TH_RST|TH_PUSH|TH_ECN)) {
+#else
        if ((flags = tp->th_flags) & (TH_SYN|TH_FIN|TH_RST|TH_PUSH)) {
+#endif
                if (flags & TH_SYN)
                        putchar('S');
                if (flags & TH_FIN)
@@ -141,6 +185,10 @@ tcp_print(register const u_char *bp, register u_int length,
                        putchar('R');
                if (flags & TH_PUSH)
                        putchar('P');
+#ifdef TH_ECN
+               if (flags & TH_ECN)
+                       putchar('C');
+#endif
        } else
                putchar('.');
 
@@ -154,6 +202,49 @@ tcp_print(register const u_char *bp, register u_int length,
                 * collating order so there's only one entry for
                 * both directions).
                 */
+#ifdef INET6
+               bzero(&tha, sizeof(tha));
+               rev = 0;
+               if (ip6) {
+                       if (sport > dport) {
+                               rev = 1;
+                       } else if (sport == dport) {
+                           int i;
+
+                           for (i = 0; i < 4; i++) {
+                               if (((u_int32_t *)(&ip6->ip6_src))[i] >
+                                   ((u_int32_t *)(&ip6->ip6_dst))[i]) {
+                                       rev = 1;
+                                       break;
+                               }
+                           }
+                       }
+                       if (rev) {
+                               tha.src = ip6->ip6_dst;
+                               tha.dst = ip6->ip6_src;
+                               tha.port = dport << 16 | sport;
+                       } else {
+                               tha.dst = ip6->ip6_dst;
+                               tha.src = ip6->ip6_src;
+                               tha.port = sport << 16 | dport;
+                       }
+               } else {
+                       if (sport > dport ||
+                           (sport == dport &&
+                            ip->ip_src.s_addr > ip->ip_dst.s_addr)) {
+                               rev = 1;
+                       }
+                       if (rev) {
+                               *(struct in_addr *)&tha.src = ip->ip_dst;
+                               *(struct in_addr *)&tha.dst = ip->ip_src;
+                               tha.port = dport << 16 | sport;
+                       } else {
+                               *(struct in_addr *)&tha.dst = ip->ip_dst;
+                               *(struct in_addr *)&tha.src = ip->ip_src;
+                               tha.port = sport << 16 | dport;
+                       }
+               }
+#else
                if (sport < dport ||
                    (sport == dport &&
                     ip->ip_src.s_addr < ip->ip_dst.s_addr)) {
@@ -165,6 +256,7 @@ tcp_print(register const u_char *bp, register u_int length,
                        tha.port = dport << 16 | sport;
                        rev = 1;
                }
+#endif
 
                for (th = &tcp_seq_hash[tha.port % TSEQ_HASHSIZE];
                     th->nxt; th = th->nxt)
@@ -349,6 +441,16 @@ tcp_print(register const u_char *bp, register u_int length,
                }
                putchar('>');
        }
+
+       if (length <= 0)
+               return;
+
+       /*
+        * Decode payload if necessary.
+        */
+       bp += (tp->th_off * 4);
+       if (sport == 179 || dport == 179)
+               bgp_print(bp, length);
        return;
 bad:
        fputs("[bad opt]", stdout);