1 files changed, 241 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-sl.c b/contrib/tcpdump/print-sl.c
new file mode 100644
index 0000000..dd02767
--- /dev/null
+++ b/contrib/tcpdump/print-sl.c
@@ -0,0 +1,241 @@
+/*
+ * Copyright (c) 1989, 1990, 1991, 1993, 1994, 1995, 1996, 1997
+ *	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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+    "@(#) $Header: /tcpdump/master/tcpdump/print-sl.c,v 1.65 2005-04-06 21:32:42 mcr Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <pcap.h>
+#include <stdio.h>
+
+#include "interface.h"
+#include "addrtoname.h"
+#include "extract.h"			/* must come after interface.h */
+
+#include "ip.h"
+#include "tcp.h"
+#include "slip.h"
+#include "slcompress.h"
+
+static u_int lastlen[2][256];
+static u_int lastconn = 255;
+
+static void sliplink_print(const u_char *, const struct ip *, u_int);
+static void compressed_sl_print(const u_char *, const struct ip *, u_int, int);
+
+u_int
+sl_if_print(const struct pcap_pkthdr *h, const u_char *p)
+{
+	register u_int caplen = h->caplen;
+	register u_int length = h->len;
+	register const struct ip *ip;
+
+	if (caplen < SLIP_HDRLEN) {
+		printf("[|slip]");
+		return (caplen);
+	}
+
+	length -= SLIP_HDRLEN;
+
+	ip = (struct ip *)(p + SLIP_HDRLEN);
+
+	if (eflag)
+		sliplink_print(p, ip, length);
+
+	switch (IP_V(ip)) {
+	case 4:
+	        ip_print(gndo, (u_char *)ip, length);
+		break;
+#ifdef INET6
+	case 6:
+		ip6_print((u_char *)ip, length);
+		break;
+#endif
+	default:
+		printf ("ip v%d", IP_V(ip));
+	}
+
+	return (SLIP_HDRLEN);
+}
+
+u_int
+sl_bsdos_if_print(const struct pcap_pkthdr *h, const u_char *p)
+{
+	register u_int caplen = h->caplen;
+	register u_int length = h->len;
+	register const struct ip *ip;
+
+	if (caplen < SLIP_HDRLEN) {
+		printf("[|slip]");
+		return (caplen);
+	}
+
+	length -= SLIP_HDRLEN;
+
+	ip = (struct ip *)(p + SLIP_HDRLEN);
+
+#ifdef notdef
+	if (eflag)
+		sliplink_print(p, ip, length);
+#endif
+
+	ip_print(gndo, (u_char *)ip, length);
+
+	return (SLIP_HDRLEN);
+}
+
+static void
+sliplink_print(register const u_char *p, register const struct ip *ip,
+	       register u_int length)
+{
+	int dir;
+	u_int hlen;
+
+	dir = p[SLX_DIR];
+	putchar(dir == SLIPDIR_IN ? 'I' : 'O');
+	putchar(' ');
+
+	if (nflag) {
+		/* XXX just dump the header */
+		register int i;
+
+		for (i = SLX_CHDR; i < SLX_CHDR + CHDR_LEN - 1; ++i)
+			printf("%02x.", p[i]);
+		printf("%02x: ", p[SLX_CHDR + CHDR_LEN - 1]);
+		return;
+	}
+	switch (p[SLX_CHDR] & 0xf0) {
+
+	case TYPE_IP:
+		printf("ip %d: ", length + SLIP_HDRLEN);
+		break;
+
+	case TYPE_UNCOMPRESSED_TCP:
+		/*
+		 * The connection id is stored in the IP protocol field.
+		 * Get it from the link layer since sl_uncompress_tcp()
+		 * has restored the IP header copy to IPPROTO_TCP.
+		 */
+		lastconn = ((struct ip *)&p[SLX_CHDR])->ip_p;
+		hlen = IP_HL(ip);
+		hlen += TH_OFF((struct tcphdr *)&((int *)ip)[hlen]);
+		lastlen[dir][lastconn] = length - (hlen << 2);
+		printf("utcp %d: ", lastconn);
+		break;
+
+	default:
+		if (p[SLX_CHDR] & TYPE_COMPRESSED_TCP) {
+			compressed_sl_print(&p[SLX_CHDR], ip,
+			    length, dir);
+			printf(": ");
+		} else
+			printf("slip-%d!: ", p[SLX_CHDR]);
+	}
+}
+
+static const u_char *
+print_sl_change(const char *str, register const u_char *cp)
+{
+	register u_int i;
+
+	if ((i = *cp++) == 0) {
+		i = EXTRACT_16BITS(cp);
+		cp += 2;
+	}
+	printf(" %s%d", str, i);
+	return (cp);
+}
+
+static const u_char *
+print_sl_winchange(register const u_char *cp)
+{
+	register short i;
+
+	if ((i = *cp++) == 0) {
+		i = EXTRACT_16BITS(cp);
+		cp += 2;
+	}
+	if (i >= 0)
+		printf(" W+%d", i);
+	else
+		printf(" W%d", i);
+	return (cp);
+}
+
+static void
+compressed_sl_print(const u_char *chdr, const struct ip *ip,
+		    u_int length, int dir)
+{
+	register const u_char *cp = chdr;
+	register u_int flags, hlen;
+
+	flags = *cp++;
+	if (flags & NEW_C) {
+		lastconn = *cp++;
+		printf("ctcp %d", lastconn);
+	} else
+		printf("ctcp *");
+
+	/* skip tcp checksum */
+	cp += 2;
+
+	switch (flags & SPECIALS_MASK) {
+	case SPECIAL_I:
+		printf(" *SA+%d", lastlen[dir][lastconn]);
+		break;
+
+	case SPECIAL_D:
+		printf(" *S+%d", lastlen[dir][lastconn]);
+		break;
+
+	default:
+		if (flags & NEW_U)
+			cp = print_sl_change("U=", cp);
+		if (flags & NEW_W)
+			cp = print_sl_winchange(cp);
+		if (flags & NEW_A)
+			cp = print_sl_change("A+", cp);
+		if (flags & NEW_S)
+			cp = print_sl_change("S+", cp);
+		break;
+	}
+	if (flags & NEW_I)
+		cp = print_sl_change("I+", cp);
+
+	/*
+	 * 'hlen' is the length of the uncompressed TCP/IP header (in words).
+	 * 'cp - chdr' is the length of the compressed header.
+	 * 'length - hlen' is the amount of data in the packet.
+	 */
+	hlen = IP_HL(ip);
+	hlen += TH_OFF((struct tcphdr *)&((int32_t *)ip)[hlen]);
+	lastlen[dir][lastconn] = length - (hlen << 2);
+	printf(" %d (%ld)", lastlen[dir][lastconn], (long)(cp - chdr));
+}