X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/b258556bb81a53e61ad3a2ce642b50959e0ddc06..44d21c36a135710261a1ae9733f12bf9ef9c2aa6:/print-ether.c

diff --git a/print-ether.c b/print-ether.c
index 6202a699..299c2013 100644
--- a/print-ether.c
+++ b/print-ether.c
@@ -100,6 +100,8 @@ const struct tok ethertype_values[] = {
     { ETHERTYPE_GEONET,         "GeoNet"},
     { ETHERTYPE_CALM_FAST,      "CALM FAST"},
     { ETHERTYPE_AOE,            "AoE" },
+    { ETHERTYPE_PTP,            "PTP" },
+    { ETHERTYPE_ARISTA,         "Arista Vendor Specific Protocol" },
     { 0, NULL}
 };
 
@@ -108,7 +110,7 @@ ether_addresses_print(netdissect_options *ndo, const u_char *src,
 		      const u_char *dst)
 {
 	ND_PRINT("%s > %s, ",
-		 etheraddr_string(ndo, src), etheraddr_string(ndo, dst));
+		 GET_ETHERADDR_STRING(src), GET_ETHERADDR_STRING(dst));
 }
 
 static void
@@ -131,7 +133,7 @@ ether_type_print(netdissect_options *ndo, uint16_t type)
  * printing Ethernet header information (such as a LANE ID for ATM LANE).
  */
 static u_int
-ether_print_common(netdissect_options *ndo, const u_char *p, u_int length,
+ether_common_print(netdissect_options *ndo, const u_char *p, u_int length,
     u_int caplen,
     void (*print_switch_tag)(netdissect_options *ndo, const u_char *),
     u_int switch_tag_len,
@@ -193,10 +195,11 @@ ether_print_common(netdissect_options *ndo, const u_char *p, u_int length,
 	 * Get the length/type field, skip past it, and print it
 	 * if we're printing the link-layer header.
 	 */
+recurse:
 	length_type = GET_BE_U_2(p);
 
 	length -= 2;
-	caplen += 2;
+	caplen -= 2;
 	p += 2;
 	hdrlen += 2;
 
@@ -287,7 +290,7 @@ ether_print_common(netdissect_options *ndo, const u_char *p, u_int length,
 		 * It's a type field, with the type for Alteon jumbo frames.
 		 * See
 		 *
-		 *	http://tools.ietf.org/html/draft-ietf-isis-ext-eth-01
+		 *	https://tools.ietf.org/html/draft-ietf-isis-ext-eth-01
 		 *
 		 * which indicates that, following the type field,
 		 * there's an LLC header and payload.
@@ -301,6 +304,34 @@ ether_print_common(netdissect_options *ndo, const u_char *p, u_int length,
 			llc_hdrlen = -llc_hdrlen;
 		}
 		hdrlen += llc_hdrlen;
+	} else if (length_type == ETHERTYPE_ARISTA) {
+		if (caplen < 2) {
+			ND_PRINT("[|arista]");
+			return (hdrlen + caplen);
+		}
+		if (length < 2) {
+			ND_PRINT("[|arista]");
+			return (hdrlen + length);
+		}
+		ether_type_print(ndo, length_type);
+		ND_PRINT(", length %u: ", orig_length);
+		int bytesConsumed = arista_ethertype_print(ndo, p, length);
+		if (bytesConsumed > 0) {
+			p += bytesConsumed;
+			length -= bytesConsumed;
+			caplen -= bytesConsumed;
+			hdrlen += bytesConsumed;
+			goto recurse;
+		} else {
+			/* subtype/version not known, print raw packet */
+			if (!ndo->ndo_eflag && length_type > MAX_ETHERNET_LENGTH_VAL) {
+				ether_addresses_print(ndo, src.addr, dst.addr);
+				ether_type_print(ndo, length_type);
+				ND_PRINT(", length %u: ", orig_length);
+			}
+			 if (!ndo->ndo_suppress_default_print)
+				 ND_DEFAULTPRINT(p, caplen);
+		}
 	} else {
 		/*
 		 * It's a type field with some other value.
@@ -344,12 +375,12 @@ ether_print_common(netdissect_options *ndo, const u_char *p, u_int length,
  * FIXME: caplen can and should be derived from ndo->ndo_snapend and p.
  */
 u_int
-ether_print_switch_tag(netdissect_options *ndo, const u_char *p, u_int length,
+ether_switch_tag_print(netdissect_options *ndo, const u_char *p, u_int length,
     u_int caplen,
     void (*print_switch_tag)(netdissect_options *, const u_char *),
     u_int switch_tag_len)
 {
-	return (ether_print_common(ndo, p, length, caplen, print_switch_tag,
+	return (ether_common_print(ndo, p, length, caplen, print_switch_tag,
 				   switch_tag_len, NULL, NULL));
 }
 
@@ -368,8 +399,8 @@ ether_print(netdissect_options *ndo,
 	    const u_char *encap_header_arg)
 {
 	ndo->ndo_protocol = "ether";
-	return (ether_print_common(ndo, p, length, caplen, NULL, 0,
-				    print_encap_header, encap_header_arg));
+	return (ether_common_print(ndo, p, length, caplen, NULL, 0,
+				   print_encap_header, encap_header_arg));
 }
 
 /*
@@ -570,6 +601,10 @@ ethertype_print(netdissect_options *ndo,
 		aoe_print(ndo, p, length);
 		return (1);
 
+	case ETHERTYPE_PTP:
+		ptp_print(ndo, p, length);
+		return (1);
+
 	case ETHERTYPE_LAT:
 	case ETHERTYPE_SCA:
 	case ETHERTYPE_MOPRC: