#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 1.66 2000-06-01 01:09:32 assar Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
#endif
#include <sys/param.h>
#include <sys/time.h>
+#include <rpc/rpc.h>
+
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#define TCPOPT_CCECHO 13 /* T/TCP CC options (rfc1644) */
#endif
+/*
+ * Definitions required for ECN
+ * for use if the OS running tcpdump does not have ECN
+ */
+#ifndef TH_ECNECHO
+#define TH_ECNECHO 0x40 /* ECN Echo in tcp header */
+#endif
+#ifndef TH_CWR
+#define TH_CWR 0x80 /* ECN Cwnd Reduced in tcp header*/
+#endif
+
struct tha {
#ifndef INET6
struct in_addr src;
static struct tcp_seq_hash tcp_seq_hash[TSEQ_HASHSIZE];
+#ifndef TELNET_PORT
+#define TELNET_PORT 23
+#endif
+#ifndef BGP_PORT
+#define BGP_PORT 179
+#endif
+#define NETBIOS_SSN_PORT 139
+#ifndef NFS_PORT
+#define NFS_PORT 2049
+#endif
+
void
tcp_print(register const u_char *bp, register u_int length,
register const u_char *bp2)
register u_char flags;
register int hlen;
register char ch;
- u_short sport, dport, win, urp;
+ u_int16_t sport, dport, win, urp;
u_int32_t seq, ack, thseq, thack;
int threv;
#ifdef INET6
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);
+
+ hlen = tp->th_off * 4;
+
+ /*
+ * If data present and NFS port used, assume NFS.
+ * Pass offset of data plus 4 bytes for RPC TCP msg length
+ * to NFS print routines.
+ */
+ if (!qflag) {
+ if ((u_char *)tp + 4 + sizeof(struct rpc_msg) <= snapend &&
+ dport == NFS_PORT) {
+ nfsreq_print((u_char *)tp + hlen + 4, length-hlen,
+ (u_char *)ip);
+ return;
+ } else if ((u_char *)tp + 4 + sizeof(struct rpc_msg)
+ <= snapend &&
+ sport == NFS_PORT) {
+ nfsreply_print((u_char *)tp + hlen + 4,length-hlen,
+ (u_char *)ip);
+ return;
+ }
+ }
#ifdef INET6
if (ip6) {
if (ip6->ip6_nxt == IPPROTO_TCP) {
}
}
+ TCHECK(*tp);
+
+ seq = (u_int32_t)ntohl(tp->th_seq);
+ ack = (u_int32_t)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;
}
-#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 = tp->th_flags) & (TH_SYN|TH_FIN|TH_RST|TH_PUSH|
+ TH_ECNECHO|TH_CWR)) {
if (flags & TH_SYN)
putchar('S');
if (flags & TH_FIN)
putchar('R');
if (flags & TH_PUSH)
putchar('P');
-#ifdef TH_ECN
- if (flags & TH_ECN)
- putchar('C');
-#endif
+ if (flags & TH_CWR)
+ putchar('W'); /* congestion _W_indow reduced (ECN) */
+ if (flags & TH_ECNECHO)
+ putchar('E'); /* ecn _E_cho sent (ECN) */
} else
putchar('.');
- if (flags&0xc0) {
- printf(" [");
- if (flags&0x40)
- printf("ECN-Echo");
- if (flags&0x80)
- printf("%sCWR", (flags&0x40) ? "," : "");
- printf("]");
- }
-
if (!Sflag && (flags & TH_ACK)) {
register struct tcp_seq_hash *th;
register int rev;
sizeof(th->addr)))
break;
- if (!th->nxt || flags & TH_SYN) {
+ if (!th->nxt || (flags & TH_SYN)) {
/* didn't find it or new conversation */
if (th->nxt == NULL) {
th->nxt = (struct tcp_seq_hash *)
th->ack = seq, th->seq = ack - 1;
else
th->seq = seq, th->ack = ack - 1;
- } else {
-
- thseq = th->seq;
- thack = th->ack;
+ } else {
if (rev)
seq -= th->ack, ack -= th->seq;
else
seq -= th->seq, ack -= th->ack;
}
+
+ thseq = th->seq;
+ thack = th->ack;
+ } else {
+ /*fool gcc*/
+ thseq = thack = threv = 0;
}
- hlen = tp->th_off * 4;
if (hlen > length) {
(void)printf(" [bad hdr 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);
* Decode payload if necessary.
*/
bp += (tp->th_off * 4);
- if (sport == 179 || dport == 179)
+ if (!qflag && vflag && length > 0
+ && (sport == TELNET_PORT || dport == TELNET_PORT))
+ telnet_print(bp, length);
+ else if (sport == BGP_PORT || dport == BGP_PORT)
bgp_print(bp, length);
+ else if (sport == NETBIOS_SSN_PORT || dport == NETBIOS_SSN_PORT)
+ nbt_tcp_print(bp, length);
return;
bad:
fputs("[bad opt]", stdout);
projects / tcpdump / blobdiff