X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/e070cf232ffadbdbbca68b132ef369675890e566..refs/heads/master:/print-lane.c

diff --git a/print-lane.c b/print-lane.c
index fe0afb4b..3836b066 100644
--- a/print-lane.c
+++ b/print-lane.c
@@ -20,25 +20,29 @@
  *
  */
 
-#ifndef lint
-static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-lane.c,v 1.18 2002-12-18 08:53:22 guy Exp $ (LBL)";
-#endif
+/* \summary: ATM LANE printer */
 
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+#include <config.h>
 
-#include <tcpdump-stdinc.h>
+#include "netdissect-stdinc.h"
 
-#include <stdio.h>
-#include <pcap.h>
-
-#include "interface.h"
-#include "addrtoname.h"
+#define ND_LONGJMP_FROM_TCHECK
+#include "netdissect.h"
 #include "extract.h"
-#include "ether.h"
-#include "lane.h"
+
+struct lecdatahdr_8023 {
+  nd_uint16_t le_header;
+  nd_mac48 h_dest;
+  nd_mac48 h_source;
+  nd_uint16_t h_type;
+};
+
+struct lane_controlhdr {
+  nd_uint16_t lec_header;
+  nd_uint8_t  lec_proto;
+  nd_uint8_t  lec_vers;
+  nd_uint16_t lec_opcode;
+};
 
 static const struct tok lecop2str[] = {
 	{ 0x0001,	"configure request" },
@@ -60,124 +64,45 @@ static const struct tok lecop2str[] = {
 	{ 0,		NULL }
 };
 
-static inline void
-lane_hdr_print(register const u_char *bp, int length)
+static void
+lane_hdr_print(netdissect_options *ndo, const u_char *bp)
 {
-	register const struct lecdatahdr_8023 *ep;
-
-	ep = (const struct lecdatahdr_8023 *)bp;
-	if (qflag)
-		(void)printf("lecid:%x %s %s %d: ",
-			     EXTRACT_16BITS(&ep->le_header),
-			     etheraddr_string(ep->h_source),
-			     etheraddr_string(ep->h_dest),
-			     length);
-	else
-		(void)printf("lecid:%x %s %s %s %d: ",
-			     EXTRACT_16BITS(&ep->le_header),
-			     etheraddr_string(ep->h_source),
-			     etheraddr_string(ep->h_dest),
-			     etherproto_string(ep->h_type),
-			     length);
+	ND_PRINT("lecid:%x ", GET_BE_U_2(bp));
 }
 
 /*
- * This is the top level routine of the printer.  'p' points
- * to the LANE header of the packet, 'h->ts' is the timestamp,
- * 'h->length' is the length of the packet off the wire, and 'h->caplen'
- * is the number of bytes actually captured.
- *
  * This assumes 802.3, not 802.5, LAN emulation.
  */
 void
-lane_print(const u_char *p, u_int length, u_int caplen)
+lane_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen)
 {
-	struct lane_controlhdr *lec;
-	struct lecdatahdr_8023 *ep;
-	u_short ether_type;
-	u_short extracted_ethertype;
+	const struct lane_controlhdr *lec;
 
-	if (caplen < sizeof(struct lane_controlhdr)) {
-		printf("[|lane]");
-		return;
-	}
+	ndo->ndo_protocol = "lane";
 
-	lec = (struct lane_controlhdr *)p;
-	if (EXTRACT_16BITS(&lec->lec_header) == 0xff00) {
+	lec = (const struct lane_controlhdr *)p;
+	if (GET_BE_U_2(lec->lec_header) == 0xff00) {
 		/*
 		 * LE Control.
 		 */
-		printf("lec: proto %x vers %x %s",
-		    lec->lec_proto, lec->lec_vers,
-		    tok2str(lecop2str, "opcode-#%u", EXTRACT_16BITS(&lec->lec_opcode)));
-		return;
-	}
-
-	if (caplen < sizeof(struct lecdatahdr_8023)) {
-		printf("[|lane]");
+		ND_PRINT("lec: proto %x vers %x %s",
+			 GET_U_1(lec->lec_proto),
+			 GET_U_1(lec->lec_vers),
+			 tok2str(lecop2str, "opcode-#%u", GET_BE_U_2(lec->lec_opcode)));
 		return;
 	}
 
-	if (eflag)
-		lane_hdr_print(p, length);
-
 	/*
-	 * Some printers want to check that they're not walking off the
-	 * end of the packet.
-	 * Rather than pass it all the way down, we set this global.
+	 * Go past the LE header.
 	 */
-	snapend = p + caplen;
-
-	length -= sizeof(struct lecdatahdr_8023);
-	caplen -= sizeof(struct lecdatahdr_8023);
-	ep = (struct lecdatahdr_8023 *)p;
-	p += sizeof(struct lecdatahdr_8023);
-
-	ether_type = EXTRACT_16BITS(&ep->h_type);
+	ND_TCHECK_2(p); /* Needed */
+	length -= 2;
+	caplen -= 2;
+	p += 2;
 
 	/*
-	 * Is it (gag) an 802.3 encapsulation?
+	 * Now print the encapsulated frame, under the assumption
+	 * that it's an Ethernet frame.
 	 */
-	extracted_ethertype = 0;
-	if (ether_type <= ETHERMTU) {
-		/* Try to print the LLC-layer header & higher layers */
-		if (llc_print(p, length, caplen, ep->h_source, ep->h_dest,
-		    &extracted_ethertype) == 0) {
-			/* ether_type not known, print raw packet */
-			if (!eflag)
-				lane_hdr_print((u_char *)ep, length + sizeof(*ep));
-			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,
-	    &extracted_ethertype) == 0) {
-		/* ether_type not known, print raw packet */
-		if (!eflag)
-			lane_hdr_print((u_char *)ep, length + sizeof(*ep));
-		if (!xflag && !qflag)
-			default_print(p, caplen);
-	}
-	if (xflag)
-		default_print(p, caplen);
-}
-
-void
-lane_if_print(u_char *user _U_, const struct pcap_pkthdr *h, const u_char *p)
-{
-	int caplen = h->caplen;
-	int length = h->len;
-
-	++infodelay;
-	ts_print(&h->ts);
-
-	lane_print(p, length, caplen);
-
-	putchar('\n');
-	--infodelay;
-	if (infoprint)
-		info(0);
+	ether_print(ndo, p, length, caplen, lane_hdr_print, p - 2);
 }