Virgin import of unmodified tcpdump v3.2.1 distribution from LBL.

Obtained from: ftp://ftp.ee.lbl.gov/tcpdump.tar.Z on 19-Aug-1996.

1 files changed, 360 insertions, 0 deletions

diff --git a/contrib/tcpdump/print-tcp.c b/contrib/tcpdump/print-tcp.c
new file mode 100644
index 0000000..a865e19
--- /dev/null
+++ b/contrib/tcpdump/print-tcp.c
@@ -0,0 +1,360 @@
+/*
+ * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
+ *	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 1.46 96/07/23 14:17:27 leres Exp $ (LBL)";
+#endif
+
+#include <sys/param.h>
+#include <sys/time.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>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "interface.h"
+#include "addrtoname.h"
+#include "extract.h"
+
+/* Compatibility */
+#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
+#ifndef TCPOPT_TIMESTAMP
+#define TCPOPT_TIMESTAMP	8	/* timestamps (rfc1323) */
+#endif
+#ifndef TCPOPT_CC
+#define TCPOPT_CC		11	/* T/TCP CC options (rfc1644) */
+#endif
+#ifndef TCPOPT_CCNEW
+#define TCPOPT_CCNEW		12	/* T/TCP CC options (rfc1644) */
+#endif
+#ifndef TCPOPT_CCECHO
+#define TCPOPT_CCECHO		13	/* T/TCP CC options (rfc1644) */
+#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
+
+/* These tcp optinos do not have the size octet */
+#define ZEROLENOPT(o) ((o) == TCPOPT_EOL || (o) == TCPOPT_NOP)
+
+static struct tcp_seq_hash tcp_seq_hash[TSEQ_HASHSIZE];
+
+
+void
+tcp_print(register const u_char *bp, register u_int length,
+	  register const u_char *bp2)
+{
+	register const struct tcphdr *tp;
+	register const struct ip *ip;
+	register u_char flags;
+	register u_int hlen;
+	register char ch;
+	u_short sport, dport, win, urp;
+	u_int32_t seq, ack;
+
+	tp = (struct tcphdr *)bp;
+	ip = (struct ip *)bp2;
+	ch = '\0';
+	TCHECK(*tp);
+	if (length < sizeof(*tp)) {
+		(void)printf("truncated-tcp %d", length);
+		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);
+
+	(void)printf("%s.%s > %s.%s: ",
+		ipaddr_string(&ip->ip_src), tcpport_string(sport),
+		ipaddr_string(&ip->ip_dst), tcpport_string(dport));
+
+	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 (sport < dport ||
+		    (sport == dport &&
+		     ip->ip_src.s_addr < ip->ip_dst.s_addr)) {
+			tha.src = ip->ip_src, tha.dst = ip->ip_dst;
+			tha.port = sport << 16 | dport;
+			rev = 0;
+		} else {
+			tha.src = ip->ip_dst, tha.dst = ip->ip_src;
+			tha.port = dport << 16 | sport;
+			rev = 1;
+		}
+
+		for (th = &tcp_seq_hash[tha.port % TSEQ_HASHSIZE];
+		     th->nxt; th = th->nxt)
+			if (!memcmp((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 == NULL) {
+				th->nxt = (struct tcp_seq_hash *)
+					calloc(1, sizeof(*th));
+				if (th->nxt == NULL)
+					error("tcp_print: calloc");
+			}
+			th->addr = tha;
+			if (rev)
+				th->ack = seq, th->seq = ack - 1;
+			else
+				th->seq = seq, th->ack = ack - 1;
+		} else {
+			if (rev)
+				seq -= th->ack, ack -= th->seq;
+			else
+				seq -= th->seq, ack -= th->ack;
+		}
+	}
+	hlen = tp->th_off * 4;
+	length -= hlen;
+	if (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);
+
+	(void)printf(" win %d", win);
+
+	if (flags & TH_URG)
+		(void)printf(" urg %d", urp);
+	/*
+	 * Handle any options.
+	 */
+	if ((hlen -= sizeof(*tp)) > 0) {
+		register const u_char *cp;
+		register int i, opt, len, datalen;
+
+		cp = (const u_char *)tp + sizeof(*tp);
+		putchar(' ');
+		ch = '<';
+		while (hlen > 0) {
+			--hlen;
+			putchar(ch);
+			if (cp > snapend)
+				goto trunc;
+			opt = *cp++;
+			if (ZEROLENOPT(opt))
+				len = 1;
+			else {
+				if (cp > snapend)
+					goto trunc;
+				len = *cp++;
+				--hlen;
+			}
+			datalen = 0;
+			switch (opt) {
+
+			case TCPOPT_MAXSEG:
+				(void)printf("mss");
+				datalen = 2;
+				if (cp + datalen > snapend)
+					goto trunc;
+				(void)printf(" %u", EXTRACT_16BITS(cp));
+
+				break;
+
+			case TCPOPT_EOL:
+				(void)printf("eol");
+				break;
+
+			case TCPOPT_NOP:
+				(void)printf("nop");
+				break;
+
+			case TCPOPT_WSCALE:
+				(void)printf("wscale");
+				datalen = 1;
+				if (cp + datalen > snapend)
+					goto trunc;
+				(void)printf(" %u", *cp);
+				break;
+
+			case TCPOPT_SACKOK:
+				(void)printf("sackOK");
+				break;
+
+			case TCPOPT_SACK:
+				(void)printf("sack");
+				datalen = len - 2;
+				i = datalen;
+				for (i = datalen; i > 0; i -= 4) {
+					if (cp + i + 4 > snapend)
+						goto trunc;
+					/* block-size@relative-origin */
+					(void)printf(" %u@%u",
+					    EXTRACT_16BITS(cp + 2),
+					    EXTRACT_16BITS(cp));
+				}
+				if (datalen % 4)
+					(void)printf("[len %d]", len);
+				break;
+
+			case TCPOPT_ECHO:
+				(void)printf("echo");
+				datalen = 4;
+				if (cp + datalen > snapend)
+					goto trunc;
+				(void)printf(" %u", EXTRACT_32BITS(cp));
+				break;
+
+			case TCPOPT_ECHOREPLY:
+				(void)printf("echoreply");
+				datalen = 4;
+				if (cp + datalen > snapend)
+					goto trunc;
+				(void)printf(" %u", EXTRACT_32BITS(cp));
+				break;
+
+			case TCPOPT_TIMESTAMP:
+				(void)printf("timestamp");
+				datalen = 4;
+				if (cp + datalen > snapend)
+					goto trunc;
+				(void)printf(" %u", EXTRACT_32BITS(cp));
+				datalen += 4;
+				if (cp + datalen > snapend)
+					goto trunc;
+				(void)printf(" %u", EXTRACT_32BITS(cp + 4));
+				break;
+
+			case TCPOPT_CC:
+				(void)printf("cc");
+				datalen = 4;
+				if (cp + datalen > snapend)
+					goto trunc;
+				(void)printf(" %u", EXTRACT_32BITS(cp));
+				break;
+
+			case TCPOPT_CCNEW:
+				(void)printf("ccnew");
+				datalen = 4;
+				if (cp + datalen > snapend)
+					goto trunc;
+				(void)printf(" %u", EXTRACT_32BITS(cp));
+				break;
+
+			case TCPOPT_CCECHO:
+				(void)printf("ccecho");
+				datalen = 4;
+				if (cp + datalen > snapend)
+					goto trunc;
+				(void)printf(" %u", EXTRACT_32BITS(cp));
+				break;
+
+			default:
+				(void)printf("opt-%d:", opt);
+				datalen = len - 2;
+				if  (datalen < 0)
+					datalen = 0;
+				for (i = 0; i < datalen; ++i) {
+					if (cp + i > snapend)
+						goto trunc;
+					(void)printf("%02x", cp[i]);
+				}
+				break;
+			}
+
+			/* Account for data printed */
+			cp += datalen;
+			hlen -= datalen;
+
+			/* Check specification against observed length */
+			++datalen;			/* option octet */
+			if (!ZEROLENOPT(opt))
+				++datalen;		/* size octet */
+			if (datalen != len)
+				(void)printf("[len %d]", len);
+			ch = ',';
+		}
+		putchar('>');
+	}
+	return;
+trunc:
+	fputs("[|tcp]", stdout);
+	if (ch != '\0')
+		putchar('>');
+}
+