X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/59864b113d8f2310a38d916e11a27c6f7e979ad9..0845bc813c1cc48b18cdefff0b387c110647463c:/print-sll.c

diff --git a/print-sll.c b/print-sll.c
index e15afa9e..5003a3dd 100644
--- a/print-sll.c
+++ b/print-sll.c
@@ -25,7 +25,7 @@
 
 #include <tcpdump-stdinc.h>
 
-#include "interface.h"
+#include "netdissect.h"
 #include "addrtoname.h"
 #include "ethertype.h"
 #include "extract.h"
@@ -197,6 +197,8 @@ sll_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char
 	u_int length = h->len;
 	register const struct sll_header *sllp;
 	u_short ether_type;
+	int llc_hdrlen;
+	u_int hdrlen;
 
 	if (caplen < SLL_HDR_LEN) {
 		/*
@@ -219,6 +221,7 @@ sll_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char
 	length -= SLL_HDR_LEN;
 	caplen -= SLL_HDR_LEN;
 	p += SLL_HDR_LEN;
+	hdrlen = SLL_HDR_LEN;
 
 	ether_type = EXTRACT_16BITS(&sllp->sll_protocol);
 
@@ -245,15 +248,17 @@ recurse:
 			 * 802.2.
 			 * Try to print the LLC-layer header & higher layers.
 			 */
-			if (llc_print(ndo, p, length, caplen, NULL, NULL) == 0)
+			llc_hdrlen = llc_print(ndo, p, length, caplen, NULL, NULL);
+			if (llc_hdrlen < 0)
 				goto unknown;	/* unknown LLC type */
+			hdrlen += llc_hdrlen;
 			break;
 
 		default:
 			/*FALLTHROUGH*/
 
 		unknown:
-			/* ether_type not known, print raw packet */
+			/* packet type not known, print raw packet */
 			if (!ndo->ndo_suppress_default_print)
 				ND_DEFAULTPRINT(p, caplen);
 			break;
@@ -263,9 +268,13 @@ recurse:
 		 * Print VLAN information, and then go back and process
 		 * the enclosed type field.
 		 */
-		if (caplen < 4 || length < 4) {
+		if (caplen < 4) {
+			ND_PRINT((ndo, "[|vlan]"));
+			return (hdrlen + caplen);
+		}
+		if (length < 4) {
 			ND_PRINT((ndo, "[|vlan]"));
-			return (SLL_HDR_LEN);
+			return (hdrlen + length);
 		}
 	        if (ndo->ndo_eflag) {
 	        	uint16_t tag = EXTRACT_16BITS(p);
@@ -283,6 +292,7 @@ recurse:
 		p += 4;
 		length -= 4;
 		caplen -= 4;
+		hdrlen += 4;
 		goto recurse;
 	} else {
 		if (ethertype_print(ndo, ether_type, p, length, caplen) == 0) {
@@ -294,5 +304,5 @@ recurse:
 		}
 	}
 
-	return (SLL_HDR_LEN);
+	return (hdrlen);
 }