Add printing for HSR/PRP protocols

CMakeLists.txt

@@ -1124,6 +1124,7 @@ set(NETDISSECT_SOURCE_LIST_C
     print-geonet.c
     print-gre.c
     print-hncp.c
+    print-hsr-prp.c
     print-hsrp.c
     print-http.c
     print-icmp.c

Makefile.in

@@ -142,6 +142,7 @@ LIBNETDISSECT_SRC=\
 	print-geonet.c \
 	print-gre.c \
 	print-hncp.c \
+	print-hsr-prp.c \
 	print-hsrp.c \
 	print-http.c \
 	print-icmp.c \

ethertype.h

@@ -185,6 +185,12 @@
 #ifndef ETHERTYPE_PTP
 #define ETHERTYPE_PTP		0x88f7
 #endif
+#ifndef ETHERTYPE_HSR
+#define ETHERTYPE_HSR		0x892f
+#endif
+#ifndef ETHERTYPE_HSR_PRP_SUP
+#define ETHERTYPE_HSR_PRP_SUP	0x88fb
+#endif
 #ifndef	ETHERTYPE_LOOPBACK
 #define	ETHERTYPE_LOOPBACK	0x9000
 #endif

netdissect.h

@@ -223,6 +223,7 @@ struct netdissect_options {
   int ndo_Aflag;		/* print packet only in ASCII observing TAB,
 				 * LF, CR and SPACE as graphical chars
 				 */
+  int ndo_Pflag;		/* print PRP trailer */
   int ndo_Hflag;		/* dissect 802.11s draft mesh standard */
   const char *ndo_protocol;	/* protocol */
   jmp_buf ndo_early_end;	/* jmp_buf for setjmp()/longjmp() */
@@ -654,6 +655,9 @@ extern void hex_and_ascii_print(netdissect_options *, const char *, const u_char
 extern void hex_print(netdissect_options *, const char *indent, const u_char *cp, u_int);
 extern void hex_print_with_offset(netdissect_options *, const char *indent, const u_char *cp, u_int, u_int);
 extern void hncp_print(netdissect_options *, const u_char *, u_int);
+extern void hsr_print(netdissect_options *, const u_char *, u_int);
+extern void prp_print(netdissect_options *, const u_char *, u_int);
+extern void hsr_prp_supervision_print(netdissect_options *ndo, const u_char *bp, u_int length);
 extern void hsrp_print(netdissect_options *, const u_char *, u_int);
 extern void http_print(netdissect_options *, const u_char *, u_int);
 extern void icmp6_print(netdissect_options *, const u_char *, u_int, const u_char *, int);

print-ether.c

@@ -103,6 +103,8 @@ const struct tok ethertype_values[] = {
     { ETHERTYPE_CALM_FAST,      "CALM FAST"},
     { ETHERTYPE_AOE,            "AoE" },
     { ETHERTYPE_PTP,            "PTP" },
+    { ETHERTYPE_HSR,            "HSR" },
+    { ETHERTYPE_HSR_PRP_SUP,    "HSR/PRP Supervision" },
     { ETHERTYPE_ARISTA,         "Arista Vendor Specific Protocol" },
     { 0, NULL}
 };
@@ -149,6 +151,7 @@ ether_common_print(netdissect_options *ndo, const u_char *p, u_int length,
 	int printed_length;
 	int llc_hdrlen;
 	struct lladdr_info src, dst;
+	int prp_suffix;
 
 	if (length < caplen) {
 		ND_PRINT("[length %u < caplen %u]", length, caplen);
@@ -287,6 +290,31 @@ ether_common_print(netdissect_options *ndo, const u_char *p, u_int length,
 		hdrlen += 4;
 	}
 
+	if (length_type == ETHERTYPE_HSR) {
+		if (ndo->ndo_eflag) {
+			ether_type_print(ndo, length_type);
+			if (!printed_length) {
+				ND_PRINT(", length %u: ", orig_length);
+				printed_length = 1;
+			} else
+				ND_PRINT(", ");
+			hsr_print(ndo, p, length);
+		}
+
+		length_type = GET_BE_U_2(p + 4);
+		p += 6;
+		length -= 6;
+		caplen -= 6;
+		hdrlen += 6;
+	}
+
+	if (ndo->ndo_Pflag && caplen >= 6) {
+		prp_suffix = GET_BE_U_2(p + caplen - 2);
+		if (prp_suffix == 0x88fb) {
+			prp_print(ndo, p, caplen);
+		}
+	}
+
 	/*
 	 * We now have the final length/type field.
 	 */
@@ -653,6 +681,10 @@ ethertype_print(netdissect_options *ndo,
 		ptp_print(ndo, p, length);
 		return (1);
 
+	case ETHERTYPE_HSR_PRP_SUP:
+		hsr_prp_supervision_print(ndo, p, length);
+		return (1);
+
 	case ETHERTYPE_LAT:
 	case ETHERTYPE_SCA:
 	case ETHERTYPE_MOPRC:

print-hsr-prp.c

@@ -0,0 +1,225 @@
+/*
+ * 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, and (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.
+ * 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.
+ */
+
+/* \summary: High-availability Seamless Redundancy (HSR) and
+ * Parallel Redundancy Protocol (PRP) printer */
+
+/* specification: https://webstore.iec.ch/publication/64423 */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+#include "netdissect.h"
+#include "extract.h"
+#include "addrtoname.h"
+
+/*
+ * HSR header
+ *     0                   1                   2                   3
+ *     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *    |NetID|L|       LSDUsize        |         Sequence number       |
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *     0                   1                   2                   3
+ *
+ * L = LanID
+ * LSDUsize = Link Service Data Unit size = size of the packet excluding MAC
+ * header, tags before the HSR tag (e.g. VLAN), and the HSR ethertype field.
+ * For PRP it includes the PRP suffix.
+ *
+ *
+ * PRP trailer
+ *     0                   1                   2                   3
+ *     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *    |         Sequence number       | LanId |       LSDUsize        |
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *    |         PRP Suffix (0x88fb)   |
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *     0                   1                   2                   3
+ *
+ * PRP uses a trailer on the packets, making it harder to parse. The suffix
+ * 0x88fb indicates that it is a PRP frame, but since this could occur
+ * naturally in a packet there is also the LSDUsize that indicates the size of
+ * the packet. If this size does not match then it is not a PRP trailer.
+ * Unfortunately, this could still match on other packets if coincidentally
+ * both the suffix and LSDUsize matches up. We could also verify that LanId is
+ * valid (0xA or 0xB) to further reduce likelihood of bad matches.
+ *
+ * LanId in HSR header is 0 = LAN A and 1 = LAN B. In PRP frames it is
+ * represented as 0xA and 0xB.
+ *
+ *
+ * HSR/PRP Supervision frame
+ *     0                   1                   2                   3
+ *     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *    |PathId |       version         |         Sequence number       |
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *    |   TLV1 Type   |  TLV1 Length  |   MAC Address of DANP/DANH    |
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+                               +
+ *    |                                                               |
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *    |   TLV2 Type   |  TLV2 Length  |     RedBox MAC Address        |
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+                               +
+ *    |                                                               |
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *    |   TLV0 Type   |  TLV0 Length  |
+ *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *     0                   1                   2                   3
+ *
+ * DANP = Doubly Attached Node PRP
+ * DANH = Doubly Attached Node HSR
+ */
+
+#define HSR_HDR_LEN 6
+#define HSR_PRP_SUPERVISION_LEN 22
+
+void hsr_print(netdissect_options *ndo, const u_char *bp, u_int length)
+{
+	int lanid, netid;
+	uint16_t lsdu_size;
+	uint16_t hdr;
+	uint32_t seq_nr;
+
+	ND_ICHECK_U(length, <, HSR_HDR_LEN);
+
+	hdr = GET_BE_U_2(bp);
+	lsdu_size = hdr & 0xFFF;
+	lanid = (hdr >> 12) & 0x1;
+	netid = hdr >> 13;
+
+	length -= 2;
+	bp += 2;
+	seq_nr = GET_BE_U_2(bp);
+
+	ND_PRINT("LSDUsize %u, SeqNr %u, LanId %s, NetId %u, ",
+		 lsdu_size, seq_nr, lanid ? "A" : "B", netid);
+
+	return;
+
+invalid:
+	nd_print_invalid(ndo);
+}
+
+void prp_print(netdissect_options *ndo, const u_char *bp, u_int length)
+{
+	u_int lsdu_size, lanid, seqnr;
+
+	lsdu_size = GET_BE_U_2(bp + length - 4) & 0xfff;
+	lanid = GET_BE_U_2(bp + length - 4) >> 12;
+
+	/* If length does not match LSDUsize or LanId isn't valid it isn't a
+	 * valid PRP trailer. This length assumes VLAN tags have been stripped
+	 * away already.
+	 */
+	if (lsdu_size == length && (lanid == 0xA || lanid == 0xB)) {
+		seqnr = GET_BE_U_2(bp + length - 6);
+		ND_PRINT("PRP trailer (0x88fb), LSDUsize %d, SeqNr %d, LanId %s, ",
+			 lsdu_size, seqnr, lanid == 0xA ? "A" : "B");
+	}
+}
+
+void hsr_prp_supervision_print(netdissect_options *ndo, const u_char *bp, u_int length)
+{
+	int tlvtype, tlvlength;
+	uint32_t seq_nr;
+	uint16_t hdr;
+	int version;
+	int pathid;
+
+	ndo->ndo_protocol = "hsr-prp-supervision";
+	if (!ndo->ndo_eflag) {
+		nd_print_protocol_caps(ndo);
+		ND_PRINT(", ");
+	}
+	ND_ICHECK_U(length, <, HSR_PRP_SUPERVISION_LEN);
+
+	hdr = GET_BE_U_2(bp);
+	version = hdr & 0xFFF;
+	/* PathId is always set to 0 according to current standard */
+	pathid = (hdr >> 12);
+	length -= 2;
+	bp += 2;
+	seq_nr = GET_BE_U_2(bp);
+	length -= 2;
+	bp += 2;
+	ND_PRINT("Version %d, SeqNr %d, PathId %d", version, seq_nr, pathid);
+
+	tlvtype = GET_BE_U_2(bp) >> 8;
+	tlvlength = GET_BE_U_2(bp) & 0xFF;
+	length -= 2;
+	bp += 2;
+
+	if (tlvlength != 6)
+		goto invalid;
+
+	/* TLV1 */
+	if (tlvtype == 20) {
+		/* PRP: VDAN MAC for RedBox or DANP MAC for both ports in PRP Duplicate Discard */
+		ND_PRINT(", VDAN/DANP %s", GET_MAC48_STRING(bp));
+	} else if (tlvtype == 21) {
+		/* PRP: Not valid for RedBox. DANP MAC for both ports in PRP Duplicate Accept mode */
+		ND_PRINT(", DANP %s", GET_MAC48_STRING(bp));
+	} else if (tlvtype == 23) {
+		/* HSR: MAC address of DANH */
+		ND_PRINT(", DANH %s", GET_MAC48_STRING(bp));
+	} else {
+		goto invalid;
+	}
+	length -= 6;
+	bp += 6;
+
+	tlvtype = GET_BE_U_2(bp) >> 8;
+	tlvlength = GET_BE_U_2(bp) & 0xFF;
+	length -= 2;
+	bp += 2;
+
+	/* No TLV2 indicates the device is not a RedBox */
+	if (tlvtype == 0 && tlvlength == 0)
+		return;
+	if (tlvlength != 6) {
+		goto invalid;
+	}
+
+	/* TLV2 */
+	if (tlvtype == 30) {
+		/* HSR and PRP: RedBox MAC */
+		ND_PRINT(", RedBox %s", GET_MAC48_STRING(bp));
+		length -= 6;
+		bp += 6;
+	} else {
+		goto invalid;
+	}
+
+	tlvtype = GET_BE_U_2(bp) >> 8;
+	tlvlength = GET_BE_U_2(bp) & 0xFF;
+	length -= 2;
+	bp += 2;
+
+	/* TLV0 */
+	if (tlvtype == 0 && tlvlength == 0) {
+		/* HSR and PRP closing TLV, should always be type and length 0.
+		 */
+		return;
+	}
+
+invalid:
+	nd_print_invalid(ndo);
+}
+

tcpdump.c

@@ -672,7 +672,7 @@ show_remote_devices_and_exit(void)
 #define U_FLAG
 #endif
 
-#define SHORTOPTS "aAb" B_FLAG "c:C:d" D_FLAG "eE:fF:G:hHi:" I_FLAG j_FLAG J_FLAG "KlLm:M:nNOpq" Q_FLAG "r:s:StT:u" U_FLAG "vV:w:W:xXy:Yz:Z:#"
+#define SHORTOPTS "aAb" B_FLAG "c:C:d" D_FLAG "eE:fF:G:hHi:" I_FLAG j_FLAG J_FLAG "KlLm:M:nNOpPq" Q_FLAG "r:s:StT:u" U_FLAG "vV:w:W:xXy:Yz:Z:#"
 
 /*
  * Long options.
@@ -1829,6 +1829,10 @@ main(int argc, char **argv)
 			++pflag;
 			break;
 
+		case 'P':
+			++ndo->ndo_Pflag;
+			break;
+
 		case 'q':
 			++ndo->ndo_qflag;
 			++ndo->ndo_suppress_default_print;

tests/TESTLIST

@@ -959,6 +959,10 @@ nhrp-trace			nhrp-trace.pcap			nhrp-trace.out	-v
 nhrp				nhrp.pcapng			nhrp.out	-v
 pb_nhrp_1			pb_nhrp_1.pcap			pb_nhrp_1.out	-v
 
+# HSR/PRP tests
+hsr		hsr.pcap	hsr.out		-e
+prp		prp.pcap	prp.out		-e -P
+
 # Undefined behavior tests
 ip-snmp-leftshift-unsigned ip-snmp-leftshift-unsigned.pcap ip-snmp-leftshift-unsigned.out
 ip6-snmp-oid-unsigned ip6-snmp-oid-unsigned.pcap ip6-snmp-oid-unsigned.out

tests/hsr.out

@@ -0,0 +1,24 @@
+    1  10:27:45.556140 7a:32:3c:8c:19:05 > ff:ff:ff:ff:ff:ff, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6787, LanId B, NetId 0, ethertype ARP (0x0806), Request who-has 142.250.74.110 tell 192.168.0.10, length 46
+    2  10:27:45.556152 3a:d6:01:92:63:1d > ff:ff:ff:ff:ff:ff, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6787, LanId A, NetId 0, ethertype ARP (0x0806), Request who-has 142.250.74.110 tell 192.168.0.10, length 46
+    3  10:27:46.580164 7a:32:3c:8c:19:05 > ff:ff:ff:ff:ff:ff, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6788, LanId B, NetId 0, ethertype ARP (0x0806), Request who-has 142.250.74.110 tell 192.168.0.10, length 46
+    4  10:27:46.580176 3a:d6:01:92:63:1d > ff:ff:ff:ff:ff:ff, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6788, LanId A, NetId 0, ethertype ARP (0x0806), Request who-has 142.250.74.110 tell 192.168.0.10, length 46
+    5  10:27:46.900124 7a:32:3c:8c:19:05 > 01:15:4e:00:01:00, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6789, LanId B, NetId 0, ethertype HSR/PRP Supervision (0x88fb), Version 1, SeqNr 38836, PathId 0, DANH 7a:32:3c:8c:19:05
+    6  10:27:46.900137 3a:d6:01:92:63:1d > 01:15:4e:00:01:00, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6789, LanId A, NetId 0, ethertype HSR/PRP Supervision (0x88fb), Version 1, SeqNr 38836, PathId 0, DANH 7a:32:3c:8c:19:05
+    7  10:27:47.604149 7a:32:3c:8c:19:05 > ff:ff:ff:ff:ff:ff, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6790, LanId B, NetId 0, ethertype ARP (0x0806), Request who-has 142.250.74.110 tell 192.168.0.10, length 46
+    8  10:27:47.604158 3a:d6:01:92:63:1d > ff:ff:ff:ff:ff:ff, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6790, LanId A, NetId 0, ethertype ARP (0x0806), Request who-has 142.250.74.110 tell 192.168.0.10, length 46
+    9  10:27:48.628147 7a:32:3c:8c:19:05 > ff:ff:ff:ff:ff:ff, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6791, LanId B, NetId 0, ethertype ARP (0x0806), Request who-has 142.250.74.110 tell 192.168.0.10, length 46
+   10  10:27:48.628158 3a:d6:01:92:63:1d > ff:ff:ff:ff:ff:ff, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6791, LanId A, NetId 0, ethertype ARP (0x0806), Request who-has 142.250.74.110 tell 192.168.0.10, length 46
+   11  10:27:48.920143 7a:32:3c:8c:19:05 > 01:15:4e:00:01:00, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6792, LanId B, NetId 0, ethertype HSR/PRP Supervision (0x88fb), Version 1, SeqNr 38837, PathId 0, DANH 7a:32:3c:8c:19:05
+   12  10:27:48.920154 3a:d6:01:92:63:1d > 01:15:4e:00:01:00, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6792, LanId A, NetId 0, ethertype HSR/PRP Supervision (0x88fb), Version 1, SeqNr 38837, PathId 0, DANH 7a:32:3c:8c:19:05
+   13  10:27:49.652077 7a:32:3c:8c:19:05 > ff:ff:ff:ff:ff:ff, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6793, LanId B, NetId 0, ethertype ARP (0x0806), Request who-has 142.250.74.110 tell 192.168.0.10, length 46
+   14  10:27:49.652086 3a:d6:01:92:63:1d > ff:ff:ff:ff:ff:ff, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6793, LanId A, NetId 0, ethertype ARP (0x0806), Request who-has 142.250.74.110 tell 192.168.0.10, length 46
+   15  10:27:50.676324 7a:32:3c:8c:19:05 > ff:ff:ff:ff:ff:ff, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6794, LanId B, NetId 0, ethertype ARP (0x0806), Request who-has 142.250.74.110 tell 192.168.0.10, length 46
+   16  10:27:50.676332 3a:d6:01:92:63:1d > ff:ff:ff:ff:ff:ff, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6794, LanId A, NetId 0, ethertype ARP (0x0806), Request who-has 142.250.74.110 tell 192.168.0.10, length 46
+   17  10:27:50.932131 7a:32:3c:8c:19:05 > 01:15:4e:00:01:00, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6795, LanId B, NetId 0, ethertype HSR/PRP Supervision (0x88fb), Version 1, SeqNr 38838, PathId 0, DANH 7a:32:3c:8c:19:05
+   18  10:27:50.932147 3a:d6:01:92:63:1d > 01:15:4e:00:01:00, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6795, LanId A, NetId 0, ethertype HSR/PRP Supervision (0x88fb), Version 1, SeqNr 38838, PathId 0, DANH 7a:32:3c:8c:19:05
+   19  10:27:51.700163 7a:32:3c:8c:19:05 > ff:ff:ff:ff:ff:ff, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6796, LanId B, NetId 0, ethertype ARP (0x0806), Request who-has 142.250.74.110 tell 192.168.0.10, length 46
+   20  10:27:51.700174 3a:d6:01:92:63:1d > ff:ff:ff:ff:ff:ff, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6796, LanId A, NetId 0, ethertype ARP (0x0806), Request who-has 142.250.74.110 tell 192.168.0.10, length 46
+   21  10:27:52.724026 7a:32:3c:8c:19:05 > ff:ff:ff:ff:ff:ff, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6797, LanId B, NetId 0, ethertype ARP (0x0806), Request who-has 142.250.74.110 tell 192.168.0.10, length 46
+   22  10:27:52.724036 3a:d6:01:92:63:1d > ff:ff:ff:ff:ff:ff, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6797, LanId A, NetId 0, ethertype ARP (0x0806), Request who-has 142.250.74.110 tell 192.168.0.10, length 46
+   23  10:27:52.948107 7a:32:3c:8c:19:05 > 01:15:4e:00:01:00, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6798, LanId B, NetId 0, ethertype HSR/PRP Supervision (0x88fb), Version 1, SeqNr 38839, PathId 0, DANH 7a:32:3c:8c:19:05
+   24  10:27:52.948116 3a:d6:01:92:63:1d > 01:15:4e:00:01:00, ethertype HSR (0x892f), length 66: LSDUsize 52, SeqNr 6798, LanId A, NetId 0, ethertype HSR/PRP Supervision (0x88fb), Version 1, SeqNr 38839, PathId 0, DANH 7a:32:3c:8c:19:05