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, 196 insertions, 0 deletions

diff --git a/contrib/tcpdump/print-ether.c b/contrib/tcpdump/print-ether.c
new file mode 100644
index 0000000..b2a1644
--- /dev/null
+++ b/contrib/tcpdump/print-ether.c
@@ -0,0 +1,196 @@
+/*
+ * 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-ether.c,v 1.42 96/07/23 14:17:23 leres Exp $ (LBL)";
+#endif
+
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+
+#if __STDC__
+struct mbuf;
+struct rtentry;
+#endif
+#include <net/if.h>
+
+#include <netinet/in.h>
+#include <netinet/if_ether.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/ip_var.h>
+#include <netinet/udp.h>
+#include <netinet/udp_var.h>
+#include <netinet/tcp.h>
+#include <netinet/tcpip.h>
+
+#include <stdio.h>
+#include <pcap.h>
+
+#include "interface.h"
+#include "addrtoname.h"
+#include "ethertype.h"
+
+const u_char *packetp;
+const u_char *snapend;
+
+static inline void
+ether_print(register const u_char *bp, u_int length)
+{
+	register const struct ether_header *ep;
+
+	ep = (const struct ether_header *)bp;
+	if (qflag)
+		(void)printf("%s %s %d: ",
+			     etheraddr_string(ESRC(ep)),
+			     etheraddr_string(EDST(ep)),
+			     length);
+	else
+		(void)printf("%s %s %s %d: ",
+			     etheraddr_string(ESRC(ep)),
+			     etheraddr_string(EDST(ep)),
+			     etherproto_string(ep->ether_type),
+			     length);
+}
+
+/*
+ * This is the top level routine of the printer.  'p' is the points
+ * to the ether header of the packet, 'tvp' is the timestamp,
+ * 'length' is the length of the packet off the wire, and 'caplen'
+ * is the number of bytes actually captured.
+ */
+void
+ether_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
+{
+	u_int caplen = h->caplen;
+	u_int length = h->len;
+	struct ether_header *ep;
+	u_short ether_type;
+	extern u_short extracted_ethertype;
+
+	ts_print(&h->ts);
+
+	if (caplen < sizeof(struct ether_header)) {
+		printf("[|ether]");
+		goto out;
+	}
+
+	if (eflag)
+		ether_print(p, length);
+
+	/*
+	 * Some printers want to get back at the ethernet addresses,
+	 * and/or check that they're not walking off the end of the packet.
+	 * Rather than pass them all the way down, we set these globals.
+	 */
+	packetp = p;
+	snapend = p + caplen;
+
+	length -= sizeof(struct ether_header);
+	caplen -= sizeof(struct ether_header);
+	ep = (struct ether_header *)p;
+	p += sizeof(struct ether_header);
+
+	ether_type = ntohs(ep->ether_type);
+
+	/*
+	 * Is it (gag) an 802.3 encapsulation?
+	 */
+	extracted_ethertype = 0;
+	if (ether_type < ETHERMTU) {
+		/* Try to print the LLC-layer header & higher layers */
+		if (llc_print(p, length, caplen, ESRC(ep), EDST(ep)) == 0) {
+			/* ether_type not known, print raw packet */
+			if (!eflag)
+				ether_print((u_char *)ep, length);
+			if (extracted_ethertype) {
+				printf("(LLC %s) ",
+			       etherproto_string(htons(extracted_ethertype)));
+			}
+			if (!xflag && !qflag)
+				default_print(p, caplen);
+		}
+	} else if (ether_encap_print(ether_type, p, length, caplen) == 0) {
+		/* ether_type not known, print raw packet */
+		if (!eflag)
+			ether_print((u_char *)ep, length + sizeof(*ep));
+		if (!xflag && !qflag)
+			default_print(p, caplen);
+	}
+	if (xflag)
+		default_print(p, caplen);
+ out:
+	putchar('\n');
+}
+
+/*
+ * Prints the packet encapsulated in an Ethernet data segment
+ * (or an equivalent encapsulation), given the Ethernet type code.
+ *
+ * Returns non-zero if it can do so, zero if the ethertype is unknown.
+ *
+ * Stuffs the ether type into a global for the benefit of lower layers
+ * that might want to know what it is.
+ */
+
+u_short	extracted_ethertype;
+
+int
+ether_encap_print(u_short ethertype, const u_char *p,
+    u_int length, u_int caplen)
+{
+	extracted_ethertype = ethertype;
+
+	switch (ethertype) {
+
+	case ETHERTYPE_IP:
+		ip_print(p, length);
+		return (1);
+
+	case ETHERTYPE_ARP:
+	case ETHERTYPE_REVARP:
+		arp_print(p, length, caplen);
+		return (1);
+
+	case ETHERTYPE_DN:
+		decnet_print(p, length, caplen);
+		return (1);
+
+	case ETHERTYPE_ATALK:
+		if (vflag)
+			fputs("et1 ", stdout);
+		atalk_print(p, length);
+		return (1);
+
+	case ETHERTYPE_AARP:
+		aarp_print(p, length);
+		return (1);
+
+	case ETHERTYPE_LAT:
+	case ETHERTYPE_SCA:
+	case ETHERTYPE_MOPRC:
+	case ETHERTYPE_MOPDL:
+		/* default_print for now */
+	default:
+		return (0);
+	}
+}