Imported Upstream version 4.3.0upstream/4.3.0

1 files changed, 231 insertions, 0 deletions

diff --git a/print-sll.c b/print-sll.c
new file mode 100644
index 0000000..a044de6
--- /dev/null
+++ b/print-sll.c
@@ -0,0 +1,231 @@
+/*
+ * Copyright (c) 1988, 1989, 1990, 1991, 1992, 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.
+ */
+#ifndef lint
+static const char rcsid[] _U_ =
+    "@(#) $Header: /tcpdump/master/tcpdump/print-sll.c,v 1.19 2005-11-13 12:12:43 guy Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <pcap.h>
+
+#include "interface.h"
+#include "addrtoname.h"
+#include "ethertype.h"
+#include "extract.h"
+
+#include "ether.h"
+#include "sll.h"
+
+const struct tok sll_pkttype_values[] = {
+    { LINUX_SLL_HOST, "In" },
+    { LINUX_SLL_BROADCAST, "B" },
+    { LINUX_SLL_MULTICAST, "M" },
+    { LINUX_SLL_OTHERHOST, "P" },
+    { LINUX_SLL_OUTGOING, "Out" },
+    { 0, NULL}
+};
+
+static inline void
+sll_print(register const struct sll_header *sllp, u_int length)
+{
+	u_short ether_type;
+
+        printf("%3s ",tok2str(sll_pkttype_values,"?",EXTRACT_16BITS(&sllp->sll_pkttype)));
+
+	/*
+	 * XXX - check the link-layer address type value?
+	 * For now, we just assume 6 means Ethernet.
+	 * XXX - print others as strings of hex?
+	 */
+	if (EXTRACT_16BITS(&sllp->sll_halen) == 6)
+		(void)printf("%s ", etheraddr_string(sllp->sll_addr));
+
+	if (!qflag) {
+		ether_type = EXTRACT_16BITS(&sllp->sll_protocol);
+	
+		if (ether_type <= ETHERMTU) {
+			/*
+			 * Not an Ethernet type; what type is it?
+			 */
+			switch (ether_type) {
+
+			case LINUX_SLL_P_802_3:
+				/*
+				 * Ethernet_802.3 IPX frame.
+				 */
+				(void)printf("802.3");
+				break;
+
+			case LINUX_SLL_P_802_2:
+				/*
+				 * 802.2.
+				 */
+				(void)printf("802.2");
+				break;
+
+			default:
+				/*
+				 * What is it?
+				 */
+				(void)printf("ethertype Unknown (0x%04x)",
+				    ether_type);
+				break;
+			}
+		} else {
+			(void)printf("ethertype %s (0x%04x)",
+			    tok2str(ethertype_values, "Unknown", ether_type),
+			    ether_type);
+		}
+		(void)printf(", length %u: ", length);
+	}
+}
+
+/*
+ * This is the top level routine of the printer.  'p' points to the
+ * Linux "cooked capture" header of the packet, 'h->ts' is the timestamp,
+ * 'h->len' is the length of the packet off the wire, and 'h->caplen'
+ * is the number of bytes actually captured.
+ */
+u_int
+sll_if_print(const struct pcap_pkthdr *h, const u_char *p)
+{
+	u_int caplen = h->caplen;
+	u_int length = h->len;
+	register const struct sll_header *sllp;
+	u_short ether_type;
+	u_short extracted_ethertype;
+
+	if (caplen < SLL_HDR_LEN) {
+		/*
+		 * XXX - this "can't happen" because "pcap-linux.c" always
+		 * adds this many bytes of header to every packet in a
+		 * cooked socket capture.
+		 */
+		printf("[|sll]");
+		return (caplen);
+	}
+
+	sllp = (const struct sll_header *)p;
+
+	if (eflag)
+		sll_print(sllp, length);
+
+	/*
+	 * Go past the cooked-mode header.
+	 */
+	length -= SLL_HDR_LEN;
+	caplen -= SLL_HDR_LEN;
+	p += SLL_HDR_LEN;
+
+	ether_type = EXTRACT_16BITS(&sllp->sll_protocol);
+
+recurse:
+	/*
+	 * Is it (gag) an 802.3 encapsulation, or some non-Ethernet
+	 * packet type?
+	 */
+	if (ether_type <= ETHERMTU) {
+		/*
+		 * Yes - what type is it?
+		 */
+		switch (ether_type) {
+
+		case LINUX_SLL_P_802_3:
+			/*
+			 * Ethernet_802.3 IPX frame.
+			 */
+			ipx_print(p, length);
+			break;
+
+		case LINUX_SLL_P_802_2:
+			/*
+			 * 802.2.
+			 * Try to print the LLC-layer header & higher layers.
+			 */
+			if (llc_print(p, length, caplen, NULL, NULL,
+			    &extracted_ethertype) == 0)
+				goto unknown;	/* unknown LLC type */
+			break;
+
+		default:
+			extracted_ethertype = 0;
+			/*FALLTHROUGH*/
+
+		unknown:
+			/* ether_type not known, print raw packet */
+			if (!eflag)
+				sll_print(sllp, length + SLL_HDR_LEN);
+			if (extracted_ethertype) {
+				printf("(LLC %s) ",
+			       etherproto_string(htons(extracted_ethertype)));
+			}
+			if (!suppress_default_print)
+				default_print(p, caplen);
+			break;
+		}
+	} else if (ether_type == ETHERTYPE_8021Q) {
+		/*
+		 * Print VLAN information, and then go back and process
+		 * the enclosed type field.
+		 */
+		if (caplen < 4 || length < 4) {
+			printf("[|vlan]");
+			return (SLL_HDR_LEN);
+		}
+	        if (eflag) {
+	        	u_int16_t tag = EXTRACT_16BITS(p);
+
+			printf("vlan %u, p %u%s, ",
+			    tag & 0xfff,
+			    tag >> 13,
+			    (tag & 0x1000) ? ", CFI" : "");
+		}
+
+		ether_type = EXTRACT_16BITS(p + 2);
+		if (ether_type <= ETHERMTU)
+			ether_type = LINUX_SLL_P_802_2;
+		if (!qflag) {
+			(void)printf("ethertype %s, ",
+			    tok2str(ethertype_values, "Unknown", ether_type));
+		}
+		p += 4;
+		length -= 4;
+		caplen -= 4;
+		goto recurse;
+	} else {
+		if (ethertype_print(gndo, ether_type, p, length, caplen) == 0) {
+			/* ether_type not known, print raw packet */
+			if (!eflag)
+				sll_print(sllp, length + SLL_HDR_LEN);
+			if (!suppress_default_print)
+				default_print(p, caplen);
+		}
+	}
+
+	return (SLL_HDR_LEN);
+}