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- /*
- * Copyright (c) 1988-1990 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that: (1) source code distributions
- * retain the above copyright notice and this paragraph in its entirety, (2)
- * distributions including binary code include the above copyright notice and
- * this paragraph in its entirety in the documentation or other materials
- * provided with the distribution, and (3) all advertising materials mentioning
- * features or use of this software display the following acknowledgement:
- * ``This product includes software developed by the University of California,
- * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
- * the University nor the names of its contributors may be used to endorse
- * or promote products derived from this software without specific prior
- * written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- #ifndef lint
- static char rcsid[] =
- "@(#) $Header: print-tcp.c,v 1.18 92/05/25 14:29:04 mccanne Exp $ (LBL)";
- #endif
-
- #include <sys/param.h>
- #include <sys/types.h>
- #include <netinet/in.h>
- #include <netinet/in_systm.h>
- #include <netinet/ip.h>
- #include <netinet/ip_var.h>
- #include <netinet/tcp.h>
- #include <netinet/tcpip.h>
-
- #ifdef X10
- #include <X/X.h>
- #include <X/Xproto.h>
- #endif
-
- #include "interface.h"
- #include "addrtoname.h"
-
- #ifndef TCPOPT_WSCALE
- #define TCPOPT_WSCALE 3 /* window scale factor (rfc1072) */
- #endif
- #ifndef TCPOPT_SACKOK
- #define TCPOPT_SACKOK 4 /* selective ack ok (rfc1072) */
- #endif
- #ifndef TCPOPT_SACK
- #define TCPOPT_SACK 5 /* selective ack (rfc1072) */
- #endif
- #ifndef TCPOPT_ECHO
- #define TCPOPT_ECHO 6 /* echo (rfc1072) */
- #endif
- #ifndef TCPOPT_ECHOREPLY
- #define TCPOPT_ECHOREPLY 7 /* echo (rfc1072) */
- #endif
-
- struct tha {
- struct in_addr src;
- struct in_addr dst;
- u_int port;
- };
-
- struct tcp_seq_hash {
- struct tcp_seq_hash *nxt;
- struct tha addr;
- tcp_seq seq;
- tcp_seq ack;
- };
-
- #define TSEQ_HASHSIZE 919
-
- static struct tcp_seq_hash tcp_seq_hash[TSEQ_HASHSIZE];
-
-
- void
- tcp_print(tp, length, ip)
- register struct tcphdr *tp;
- register int length;
- register struct ip *ip;
- {
- register u_char flags;
- register int hlen;
-
- if ((u_char *)(tp + 1) > snapend) {
- printf("[|tcp]");
- return;
- }
- if (length < sizeof(struct tcphdr)) {
- (void)printf("truncated-tcp %d", length);
- return;
- }
-
- NTOHS(tp->th_sport);
- NTOHS(tp->th_dport);
- NTOHL(tp->th_seq);
- NTOHL(tp->th_ack);
- NTOHS(tp->th_win);
- NTOHS(tp->th_urp);
-
- (void)printf("%s.%s > %s.%s: ",
- ipaddr_string(&ip->ip_src), tcpport_string(tp->th_sport),
- ipaddr_string(&ip->ip_dst), tcpport_string(tp->th_dport));
-
- if (!qflag) {
- #ifdef X10
- register int be;
-
- if ((be = (tp->th_sport == X_TCP_BI_PORT ||
- tp->th_dport == X_TCP_BI_PORT)) ||
- tp->th_sport == X_TCP_LI_PORT ||
- tp->th_dport == X_TCP_LI_PORT) {
- register XReq *xp = (XReq *)(tp + 1);
-
- x10_print(xp, length - sizeof(struct tcphdr), be);
- return;
- }
- #endif
- }
-
- if (qflag) {
- (void)printf("tcp %d", length - tp->th_off * 4);
- return;
- }
- if ((flags = tp->th_flags) & (TH_SYN|TH_FIN|TH_RST|TH_PUSH)) {
- if (flags & TH_SYN)
- putchar('S');
- if (flags & TH_FIN)
- putchar('F');
- if (flags & TH_RST)
- putchar('R');
- if (flags & TH_PUSH)
- putchar('P');
- } else
- putchar('.');
-
- if (!Sflag && (flags & TH_ACK)) {
- register struct tcp_seq_hash *th;
- register int rev;
- struct tha tha;
- /*
- * Find (or record) the initial sequence numbers for
- * this conversation. (we pick an arbitrary
- * collating order so there's only one entry for
- * both directions).
- */
- if (tp->th_sport < tp->th_dport ||
- (tp->th_sport == tp->th_dport &&
- ip->ip_src.s_addr < ip->ip_dst.s_addr)) {
- tha.src = ip->ip_src, tha.dst = ip->ip_dst;
- tha.port = tp->th_sport << 16 | tp->th_dport;
- rev = 0;
- } else {
- tha.src = ip->ip_dst, tha.dst = ip->ip_src;
- tha.port = tp->th_dport << 16 | tp->th_sport;
- rev = 1;
- }
-
- for (th = &tcp_seq_hash[tha.port % TSEQ_HASHSIZE];
- th->nxt; th = th->nxt)
- if (!bcmp((char *)&tha, (char *)&th->addr,
- sizeof(th->addr)))
- break;
-
- if (!th->nxt || flags & TH_SYN) {
- /* didn't find it or new conversation */
- if (!th->nxt)
- th->nxt = (struct tcp_seq_hash *)
- calloc(1, sizeof (*th));
- th->addr = tha;
- if (rev)
- th->ack = tp->th_seq, th->seq = tp->th_ack - 1;
- else
- th->seq = tp->th_seq, th->ack = tp->th_ack - 1;
- } else {
- if (rev)
- tp->th_seq -= th->ack, tp->th_ack -= th->seq;
- else
- tp->th_seq -= th->seq, tp->th_ack -= th->ack;
- }
- }
- hlen = tp->th_off * 4;
- length -= hlen;
- if (length > 0 || flags & (TH_SYN | TH_FIN | TH_RST))
- (void)printf(" %lu:%lu(%d)", tp->th_seq, tp->th_seq + length,
- length);
- if (flags & TH_ACK)
- (void)printf(" ack %lu", tp->th_ack);
-
- (void)printf(" win %d", tp->th_win);
-
- if (flags & TH_URG)
- (void)printf(" urg %d", tp->th_urp);
- /*
- * Handle any options.
- */
- if ((hlen -= sizeof(struct tcphdr)) > 0) {
- register u_char *cp = (u_char *)tp + sizeof(struct tcphdr);
- int i;
- char ch = '<';
-
- putchar(' ');
- while (--hlen >= 0) {
- putchar(ch);
- switch (*cp++) {
- case TCPOPT_MAXSEG:
- {
- u_short mss;
- #ifdef TCPDUMP_ALIGN
- bcopy((char *)cp + 1, (char *)&mss,
- sizeof(mss));
- #else
- mss = *(u_short *)(cp + 1);
- #endif
- (void)printf("mss %d", ntohs(mss));
- if (*cp != 4)
- (void)printf("[len %d]", *cp);
- cp += 3;
- hlen -= 3;
- break;
- }
- case TCPOPT_EOL:
- (void)printf("eol");
- break;
- case TCPOPT_NOP:
- (void)printf("nop");
- break;
- case TCPOPT_WSCALE:
- (void)printf("wscale %d", cp[1]);
- if (*cp != 3)
- (void)printf("[len %d]", *cp);
- cp += 2;
- hlen -= 2;
- break;
- case TCPOPT_SACKOK:
- (void)printf("sackOK");
- if (*cp != 2)
- (void)printf("[len %d]", *cp);
- cp += 1;
- hlen -= 1;
- break;
- case TCPOPT_ECHO:
- {
- u_long v;
- #ifdef TCPDUMP_ALIGN
- bcopy((char *)cp + 1, (char *)&v,
- sizeof(v));
- #else
- v = *(u_long *)(cp + 1);
- #endif
- (void)printf("echo %lu", v);
- if (*cp != 6)
- (void)printf("[len %d]", *cp);
- cp += 5;
- hlen -= 5;
- break;
- }
- case TCPOPT_ECHOREPLY:
- {
- u_long v;
- #ifdef TCPDUMP_ALIGN
- bcopy((char *)cp + 1, (char *)&v,
- sizeof(v));
- #else
- v = *(u_long *)(cp + 1);
- #endif
- (void)printf("echoreply %lu", v);
- if (*cp != 6)
- (void)printf("[len %d]", *cp);
- cp += 5;
- hlen -= 5;
- break;
- }
- default:
- (void)printf("opt-%d:", cp[-1]);
- for (i = *cp++ - 2, hlen -= i + 1; i > 0; --i)
- (void)printf("%02x", *cp++);
- break;
- }
- ch = ',';
- }
- putchar('>');
- }
- }
-
-