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-rw-r--r--print-slow.c737
1 files changed, 737 insertions, 0 deletions
diff --git a/print-slow.c b/print-slow.c
new file mode 100644
index 0000000..1183818
--- /dev/null
+++ b/print-slow.c
@@ -0,0 +1,737 @@
+/*
+ * Copyright (c) 1998-2006 The TCPDUMP project
+ *
+ * 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.
+ *
+ * support for the IEEE "slow protocols" LACP, MARKER as per 802.3ad
+ * OAM as per 802.3ah
+ *
+ * Original code by Hannes Gredler (hannes@gredler.at)
+ */
+
+/* \summary: IEEE "slow protocols" (802.3ad/802.3ah) printer */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#define ND_LONGJMP_FROM_TCHECK
+#include "netdissect.h"
+#include "extract.h"
+#include "addrtoname.h"
+#include "oui.h"
+
+
+#define SLOW_PROTO_LACP 1
+#define SLOW_PROTO_MARKER 2
+#define SLOW_PROTO_OAM 3
+
+#define LACP_VERSION 1
+#define MARKER_VERSION 1
+
+static const struct tok slow_proto_values[] = {
+ { SLOW_PROTO_LACP, "LACP" },
+ { SLOW_PROTO_MARKER, "MARKER" },
+ { SLOW_PROTO_OAM, "OAM" },
+ { 0, NULL}
+};
+
+static const struct tok slow_oam_flag_values[] = {
+ { 0x0001, "Link Fault" },
+ { 0x0002, "Dying Gasp" },
+ { 0x0004, "Critical Event" },
+ { 0x0008, "Local Evaluating" },
+ { 0x0010, "Local Stable" },
+ { 0x0020, "Remote Evaluating" },
+ { 0x0040, "Remote Stable" },
+ { 0, NULL}
+};
+
+#define SLOW_OAM_CODE_INFO 0x00
+#define SLOW_OAM_CODE_EVENT_NOTIF 0x01
+#define SLOW_OAM_CODE_VAR_REQUEST 0x02
+#define SLOW_OAM_CODE_VAR_RESPONSE 0x03
+#define SLOW_OAM_CODE_LOOPBACK_CTRL 0x04
+#define SLOW_OAM_CODE_PRIVATE 0xfe
+
+static const struct tok slow_oam_code_values[] = {
+ { SLOW_OAM_CODE_INFO, "Information" },
+ { SLOW_OAM_CODE_EVENT_NOTIF, "Event Notification" },
+ { SLOW_OAM_CODE_VAR_REQUEST, "Variable Request" },
+ { SLOW_OAM_CODE_VAR_RESPONSE, "Variable Response" },
+ { SLOW_OAM_CODE_LOOPBACK_CTRL, "Loopback Control" },
+ { SLOW_OAM_CODE_PRIVATE, "Vendor Private" },
+ { 0, NULL}
+};
+
+struct slow_oam_info_t {
+ nd_uint8_t info_type;
+ nd_uint8_t info_length;
+ nd_uint8_t oam_version;
+ nd_uint16_t revision;
+ nd_uint8_t state;
+ nd_uint8_t oam_config;
+ nd_uint16_t oam_pdu_config;
+ nd_uint24_t oui;
+ nd_uint32_t vendor_private;
+};
+
+#define SLOW_OAM_INFO_TYPE_END_OF_TLV 0x00
+#define SLOW_OAM_INFO_TYPE_LOCAL 0x01
+#define SLOW_OAM_INFO_TYPE_REMOTE 0x02
+#define SLOW_OAM_INFO_TYPE_ORG_SPECIFIC 0xfe
+
+static const struct tok slow_oam_info_type_values[] = {
+ { SLOW_OAM_INFO_TYPE_END_OF_TLV, "End of TLV marker" },
+ { SLOW_OAM_INFO_TYPE_LOCAL, "Local" },
+ { SLOW_OAM_INFO_TYPE_REMOTE, "Remote" },
+ { SLOW_OAM_INFO_TYPE_ORG_SPECIFIC, "Organization specific" },
+ { 0, NULL}
+};
+
+#define OAM_INFO_TYPE_PARSER_MASK 0x3
+static const struct tok slow_oam_info_type_state_parser_values[] = {
+ { 0x00, "forwarding" },
+ { 0x01, "looping back" },
+ { 0x02, "discarding" },
+ { 0x03, "reserved" },
+ { 0, NULL}
+};
+
+#define OAM_INFO_TYPE_MUX_MASK 0x4
+static const struct tok slow_oam_info_type_state_mux_values[] = {
+ { 0x00, "forwarding" },
+ { 0x04, "discarding" },
+ { 0, NULL}
+};
+
+static const struct tok slow_oam_info_type_oam_config_values[] = {
+ { 0x01, "Active" },
+ { 0x02, "Unidirectional" },
+ { 0x04, "Remote-Loopback" },
+ { 0x08, "Link-Events" },
+ { 0x10, "Variable-Retrieval" },
+ { 0, NULL}
+};
+
+/* 11 Bits */
+#define OAM_INFO_TYPE_PDU_SIZE_MASK 0x7ff
+
+#define SLOW_OAM_LINK_EVENT_END_OF_TLV 0x00
+#define SLOW_OAM_LINK_EVENT_ERR_SYM_PER 0x01
+#define SLOW_OAM_LINK_EVENT_ERR_FRM 0x02
+#define SLOW_OAM_LINK_EVENT_ERR_FRM_PER 0x03
+#define SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM 0x04
+#define SLOW_OAM_LINK_EVENT_ORG_SPECIFIC 0xfe
+
+static const struct tok slow_oam_link_event_values[] = {
+ { SLOW_OAM_LINK_EVENT_END_OF_TLV, "End of TLV marker" },
+ { SLOW_OAM_LINK_EVENT_ERR_SYM_PER, "Errored Symbol Period Event" },
+ { SLOW_OAM_LINK_EVENT_ERR_FRM, "Errored Frame Event" },
+ { SLOW_OAM_LINK_EVENT_ERR_FRM_PER, "Errored Frame Period Event" },
+ { SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM, "Errored Frame Seconds Summary Event" },
+ { SLOW_OAM_LINK_EVENT_ORG_SPECIFIC, "Organization specific" },
+ { 0, NULL}
+};
+
+struct slow_oam_link_event_t {
+ nd_uint8_t event_type;
+ nd_uint8_t event_length;
+ nd_uint16_t time_stamp;
+ nd_uint64_t window;
+ nd_uint64_t threshold;
+ nd_uint64_t errors;
+ nd_uint64_t errors_running_total;
+ nd_uint32_t event_running_total;
+};
+
+struct slow_oam_variablerequest_t {
+ nd_uint8_t branch;
+ nd_uint16_t leaf;
+};
+
+struct slow_oam_variableresponse_t {
+ nd_uint8_t branch;
+ nd_uint16_t leaf;
+ nd_uint8_t length;
+};
+
+struct slow_oam_loopbackctrl_t {
+ nd_uint8_t command;
+};
+
+static const struct tok slow_oam_loopbackctrl_cmd_values[] = {
+ { 0x01, "Enable OAM Remote Loopback" },
+ { 0x02, "Disable OAM Remote Loopback" },
+ { 0, NULL}
+};
+
+struct tlv_header_t {
+ nd_uint8_t type;
+ nd_uint8_t length;
+};
+
+#define LACP_MARKER_TLV_TERMINATOR 0x00 /* same code for LACP and Marker */
+
+#define LACP_TLV_ACTOR_INFO 0x01
+#define LACP_TLV_PARTNER_INFO 0x02
+#define LACP_TLV_COLLECTOR_INFO 0x03
+
+#define MARKER_TLV_MARKER_INFO 0x01
+
+static const struct tok slow_tlv_values[] = {
+ { (SLOW_PROTO_LACP << 8) + LACP_MARKER_TLV_TERMINATOR, "Terminator"},
+ { (SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO, "Actor Information"},
+ { (SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO, "Partner Information"},
+ { (SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO, "Collector Information"},
+
+ { (SLOW_PROTO_MARKER << 8) + LACP_MARKER_TLV_TERMINATOR, "Terminator"},
+ { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO, "Marker Information"},
+ { 0, NULL}
+};
+
+struct lacp_tlv_actor_partner_info_t {
+ nd_uint16_t sys_pri;
+ nd_mac_addr sys;
+ nd_uint16_t key;
+ nd_uint16_t port_pri;
+ nd_uint16_t port;
+ nd_uint8_t state;
+ nd_byte pad[3];
+};
+
+static const struct tok lacp_tlv_actor_partner_info_state_values[] = {
+ { 0x01, "Activity"},
+ { 0x02, "Timeout"},
+ { 0x04, "Aggregation"},
+ { 0x08, "Synchronization"},
+ { 0x10, "Collecting"},
+ { 0x20, "Distributing"},
+ { 0x40, "Default"},
+ { 0x80, "Expired"},
+ { 0, NULL}
+};
+
+struct lacp_tlv_collector_info_t {
+ nd_uint16_t max_delay;
+ nd_byte pad[12];
+};
+
+struct marker_tlv_marker_info_t {
+ nd_uint16_t req_port;
+ nd_mac_addr req_sys;
+ nd_uint32_t req_trans_id;
+ nd_byte pad[2];
+};
+
+struct lacp_marker_tlv_terminator_t {
+ nd_byte pad[50];
+};
+
+static void slow_marker_lacp_print(netdissect_options *, const u_char *, u_int, u_int);
+static void slow_oam_print(netdissect_options *, const u_char *, u_int);
+
+void
+slow_print(netdissect_options *ndo,
+ const u_char *pptr, u_int len)
+{
+ int print_version;
+ u_int subtype;
+
+ ndo->ndo_protocol = "slow";
+ if (len < 1)
+ goto tooshort;
+ subtype = GET_U_1(pptr);
+
+ /*
+ * Sanity checking of the header.
+ */
+ switch (subtype) {
+ case SLOW_PROTO_LACP:
+ if (len < 2)
+ goto tooshort;
+ if (GET_U_1(pptr + 1) != LACP_VERSION) {
+ ND_PRINT("LACP version %u packet not supported",
+ GET_U_1(pptr + 1));
+ return;
+ }
+ print_version = 1;
+ break;
+
+ case SLOW_PROTO_MARKER:
+ if (len < 2)
+ goto tooshort;
+ if (GET_U_1(pptr + 1) != MARKER_VERSION) {
+ ND_PRINT("MARKER version %u packet not supported",
+ GET_U_1(pptr + 1));
+ return;
+ }
+ print_version = 1;
+ break;
+
+ case SLOW_PROTO_OAM: /* fall through */
+ print_version = 0;
+ break;
+
+ default:
+ /* print basic information and exit */
+ print_version = -1;
+ break;
+ }
+
+ if (print_version == 1) {
+ ND_PRINT("%sv%u, length %u",
+ tok2str(slow_proto_values, "unknown (%u)", subtype),
+ GET_U_1((pptr + 1)),
+ len);
+ } else {
+ /* some slow protos don't have a version number in the header */
+ ND_PRINT("%s, length %u",
+ tok2str(slow_proto_values, "unknown (%u)", subtype),
+ len);
+ }
+
+ /* unrecognized subtype */
+ if (print_version == -1) {
+ print_unknown_data(ndo, pptr, "\n\t", len);
+ return;
+ }
+
+ if (!ndo->ndo_vflag)
+ return;
+
+ switch (subtype) {
+ default: /* should not happen */
+ break;
+
+ case SLOW_PROTO_OAM:
+ /* skip subtype */
+ len -= 1;
+ pptr += 1;
+ slow_oam_print(ndo, pptr, len);
+ break;
+
+ case SLOW_PROTO_LACP: /* LACP and MARKER share the same semantics */
+ case SLOW_PROTO_MARKER:
+ /* skip subtype and version */
+ len -= 2;
+ pptr += 2;
+ slow_marker_lacp_print(ndo, pptr, len, subtype);
+ break;
+ }
+ return;
+
+tooshort:
+ if (!ndo->ndo_vflag)
+ ND_PRINT(" (packet is too short)");
+ else
+ ND_PRINT("\n\t\t packet is too short");
+}
+
+static void
+slow_marker_lacp_print(netdissect_options *ndo,
+ const u_char *tptr, u_int tlen,
+ u_int proto_subtype)
+{
+ const struct tlv_header_t *tlv_header;
+ const u_char *tlv_tptr;
+ u_int tlv_type, tlv_len, tlv_tlen;
+
+ union {
+ const struct lacp_marker_tlv_terminator_t *lacp_marker_tlv_terminator;
+ const struct lacp_tlv_actor_partner_info_t *lacp_tlv_actor_partner_info;
+ const struct lacp_tlv_collector_info_t *lacp_tlv_collector_info;
+ const struct marker_tlv_marker_info_t *marker_tlv_marker_info;
+ } tlv_ptr;
+
+ while(tlen>0) {
+ /* is the packet big enough to include the tlv header ? */
+ if (tlen < sizeof(struct tlv_header_t))
+ goto tooshort;
+ /* did we capture enough for fully decoding the tlv header ? */
+ tlv_header = (const struct tlv_header_t *)tptr;
+ tlv_type = GET_U_1(tlv_header->type);
+ tlv_len = GET_U_1(tlv_header->length);
+
+ ND_PRINT("\n\t%s TLV (0x%02x), length %u",
+ tok2str(slow_tlv_values,
+ "Unknown",
+ (proto_subtype << 8) + tlv_type),
+ tlv_type,
+ tlv_len);
+
+ if (tlv_type == LACP_MARKER_TLV_TERMINATOR) {
+ /*
+ * This TLV has a length of zero, and means there are no
+ * more TLVs to process.
+ */
+ return;
+ }
+
+ /* length includes the type and length fields */
+ if (tlv_len < sizeof(struct tlv_header_t)) {
+ ND_PRINT("\n\t ERROR: illegal length - should be >= %zu",
+ sizeof(struct tlv_header_t));
+ return;
+ }
+
+ /* is the packet big enough to include the tlv ? */
+ if (tlen < tlv_len)
+ goto tooshort;
+ /* did we capture enough for fully decoding the tlv ? */
+ ND_TCHECK_LEN(tptr, tlv_len);
+
+ tlv_tptr=tptr+sizeof(struct tlv_header_t);
+ tlv_tlen=tlv_len-sizeof(struct tlv_header_t);
+
+ switch((proto_subtype << 8) + tlv_type) {
+
+ /* those two TLVs have the same structure -> fall through */
+ case ((SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO):
+ case ((SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO):
+ if (tlv_tlen !=
+ sizeof(struct lacp_tlv_actor_partner_info_t)) {
+ ND_PRINT("\n\t ERROR: illegal length - should be %zu",
+ sizeof(struct tlv_header_t) + sizeof(struct lacp_tlv_actor_partner_info_t));
+ goto badlength;
+ }
+
+ tlv_ptr.lacp_tlv_actor_partner_info = (const struct lacp_tlv_actor_partner_info_t *)tlv_tptr;
+
+ ND_PRINT("\n\t System %s, System Priority %u, Key %u"
+ ", Port %u, Port Priority %u\n\t State Flags [%s]",
+ GET_ETHERADDR_STRING(tlv_ptr.lacp_tlv_actor_partner_info->sys),
+ GET_BE_U_2(tlv_ptr.lacp_tlv_actor_partner_info->sys_pri),
+ GET_BE_U_2(tlv_ptr.lacp_tlv_actor_partner_info->key),
+ GET_BE_U_2(tlv_ptr.lacp_tlv_actor_partner_info->port),
+ GET_BE_U_2(tlv_ptr.lacp_tlv_actor_partner_info->port_pri),
+ bittok2str(lacp_tlv_actor_partner_info_state_values,
+ "none",
+ GET_U_1(tlv_ptr.lacp_tlv_actor_partner_info->state)));
+
+ break;
+
+ case ((SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO):
+ if (tlv_tlen !=
+ sizeof(struct lacp_tlv_collector_info_t)) {
+ ND_PRINT("\n\t ERROR: illegal length - should be %zu",
+ sizeof(struct tlv_header_t) + sizeof(struct lacp_tlv_collector_info_t));
+ goto badlength;
+ }
+
+ tlv_ptr.lacp_tlv_collector_info = (const struct lacp_tlv_collector_info_t *)tlv_tptr;
+
+ ND_PRINT("\n\t Max Delay %u",
+ GET_BE_U_2(tlv_ptr.lacp_tlv_collector_info->max_delay));
+
+ break;
+
+ case ((SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO):
+ if (tlv_tlen !=
+ sizeof(struct marker_tlv_marker_info_t)) {
+ ND_PRINT("\n\t ERROR: illegal length - should be %zu",
+ sizeof(struct tlv_header_t) + sizeof(struct marker_tlv_marker_info_t));
+ goto badlength;
+ }
+
+ tlv_ptr.marker_tlv_marker_info = (const struct marker_tlv_marker_info_t *)tlv_tptr;
+
+ ND_PRINT("\n\t Request System %s, Request Port %u, Request Transaction ID 0x%08x",
+ GET_ETHERADDR_STRING(tlv_ptr.marker_tlv_marker_info->req_sys),
+ GET_BE_U_2(tlv_ptr.marker_tlv_marker_info->req_port),
+ GET_BE_U_4(tlv_ptr.marker_tlv_marker_info->req_trans_id));
+
+ break;
+
+ default:
+ if (ndo->ndo_vflag <= 1)
+ print_unknown_data(ndo, tlv_tptr, "\n\t ", tlv_tlen);
+ break;
+ }
+
+ badlength:
+ /* do we want to see an additional hexdump ? */
+ if (ndo->ndo_vflag > 1) {
+ print_unknown_data(ndo, tptr+sizeof(struct tlv_header_t), "\n\t ",
+ tlv_len-sizeof(struct tlv_header_t));
+ }
+
+ tptr+=tlv_len;
+ tlen-=tlv_len;
+ }
+ return;
+
+tooshort:
+ ND_PRINT("\n\t\t packet is too short");
+}
+
+static void
+slow_oam_print(netdissect_options *ndo,
+ const u_char *tptr, u_int tlen)
+{
+ uint8_t code;
+ uint8_t type, length;
+ uint8_t state;
+ uint8_t command;
+ u_int hexdump;
+
+ struct slow_oam_common_header_t {
+ nd_uint16_t flags;
+ nd_uint8_t code;
+ };
+
+ struct slow_oam_tlv_header_t {
+ nd_uint8_t type;
+ nd_uint8_t length;
+ };
+
+ union {
+ const struct slow_oam_common_header_t *slow_oam_common_header;
+ const struct slow_oam_tlv_header_t *slow_oam_tlv_header;
+ } ptr;
+
+ union {
+ const struct slow_oam_info_t *slow_oam_info;
+ const struct slow_oam_link_event_t *slow_oam_link_event;
+ const struct slow_oam_variablerequest_t *slow_oam_variablerequest;
+ const struct slow_oam_variableresponse_t *slow_oam_variableresponse;
+ const struct slow_oam_loopbackctrl_t *slow_oam_loopbackctrl;
+ } tlv;
+
+ ptr.slow_oam_common_header = (const struct slow_oam_common_header_t *)tptr;
+ if (tlen < sizeof(*ptr.slow_oam_common_header))
+ goto tooshort;
+ ND_TCHECK_SIZE(ptr.slow_oam_common_header);
+ tptr += sizeof(struct slow_oam_common_header_t);
+ tlen -= sizeof(struct slow_oam_common_header_t);
+
+ code = GET_U_1(ptr.slow_oam_common_header->code);
+ ND_PRINT("\n\tCode %s OAM PDU, Flags [%s]",
+ tok2str(slow_oam_code_values, "Unknown (%u)", code),
+ bittok2str(slow_oam_flag_values,
+ "none",
+ GET_BE_U_2(ptr.slow_oam_common_header->flags)));
+
+ switch (code) {
+ case SLOW_OAM_CODE_INFO:
+ while (tlen > 0) {
+ ptr.slow_oam_tlv_header = (const struct slow_oam_tlv_header_t *)tptr;
+ if (tlen < sizeof(*ptr.slow_oam_tlv_header))
+ goto tooshort;
+ ND_TCHECK_SIZE(ptr.slow_oam_tlv_header);
+ type = GET_U_1(ptr.slow_oam_tlv_header->type);
+ length = GET_U_1(ptr.slow_oam_tlv_header->length);
+ ND_PRINT("\n\t %s Information Type (%u), length %u",
+ tok2str(slow_oam_info_type_values, "Reserved", type),
+ type,
+ length);
+
+ if (type == SLOW_OAM_INFO_TYPE_END_OF_TLV) {
+ /*
+ * As IEEE Std 802.3-2015 says for the End of TLV Marker,
+ * "(the length and value of the Type 0x00 TLV can be ignored)".
+ */
+ return;
+ }
+
+ /* length includes the type and length fields */
+ if (length < sizeof(struct slow_oam_tlv_header_t)) {
+ ND_PRINT("\n\t ERROR: illegal length - should be >= %zu",
+ sizeof(struct slow_oam_tlv_header_t));
+ return;
+ }
+
+ if (tlen < length)
+ goto tooshort;
+ ND_TCHECK_LEN(tptr, length);
+
+ hexdump = FALSE;
+ switch (type) {
+ case SLOW_OAM_INFO_TYPE_LOCAL: /* identical format - fall through */
+ case SLOW_OAM_INFO_TYPE_REMOTE:
+ tlv.slow_oam_info = (const struct slow_oam_info_t *)tptr;
+
+ if (GET_U_1(tlv.slow_oam_info->info_length) !=
+ sizeof(struct slow_oam_info_t)) {
+ ND_PRINT("\n\t ERROR: illegal length - should be %zu",
+ sizeof(struct slow_oam_info_t));
+ hexdump = TRUE;
+ goto badlength_code_info;
+ }
+
+ ND_PRINT("\n\t OAM-Version %u, Revision %u",
+ GET_U_1(tlv.slow_oam_info->oam_version),
+ GET_BE_U_2(tlv.slow_oam_info->revision));
+
+ state = GET_U_1(tlv.slow_oam_info->state);
+ ND_PRINT("\n\t State-Parser-Action %s, State-MUX-Action %s",
+ tok2str(slow_oam_info_type_state_parser_values, "Reserved",
+ state & OAM_INFO_TYPE_PARSER_MASK),
+ tok2str(slow_oam_info_type_state_mux_values, "Reserved",
+ state & OAM_INFO_TYPE_MUX_MASK));
+ ND_PRINT("\n\t OAM-Config Flags [%s], OAM-PDU-Config max-PDU size %u",
+ bittok2str(slow_oam_info_type_oam_config_values, "none",
+ GET_U_1(tlv.slow_oam_info->oam_config)),
+ GET_BE_U_2(tlv.slow_oam_info->oam_pdu_config) &
+ OAM_INFO_TYPE_PDU_SIZE_MASK);
+ ND_PRINT("\n\t OUI %s (0x%06x), Vendor-Private 0x%08x",
+ tok2str(oui_values, "Unknown",
+ GET_BE_U_3(tlv.slow_oam_info->oui)),
+ GET_BE_U_3(tlv.slow_oam_info->oui),
+ GET_BE_U_4(tlv.slow_oam_info->vendor_private));
+ break;
+
+ case SLOW_OAM_INFO_TYPE_ORG_SPECIFIC:
+ hexdump = TRUE;
+ break;
+
+ default:
+ hexdump = TRUE;
+ break;
+ }
+
+ badlength_code_info:
+ /* do we also want to see a hex dump ? */
+ if (ndo->ndo_vflag > 1 || hexdump==TRUE) {
+ print_unknown_data(ndo, tptr, "\n\t ",
+ length);
+ }
+
+ tlen -= length;
+ tptr += length;
+ }
+ break;
+
+ case SLOW_OAM_CODE_EVENT_NOTIF:
+ /* Sequence number */
+ if (tlen < 2)
+ goto tooshort;
+ ND_PRINT("\n\t Sequence Number %u", GET_BE_U_2(tptr));
+ tlen -= 2;
+ tptr += 2;
+
+ /* TLVs */
+ while (tlen > 0) {
+ ptr.slow_oam_tlv_header = (const struct slow_oam_tlv_header_t *)tptr;
+ if (tlen < sizeof(*ptr.slow_oam_tlv_header))
+ goto tooshort;
+ type = GET_U_1(ptr.slow_oam_tlv_header->type);
+ length = GET_U_1(ptr.slow_oam_tlv_header->length);
+ ND_PRINT("\n\t %s Link Event Type (%u), length %u",
+ tok2str(slow_oam_link_event_values, "Reserved",
+ type),
+ type,
+ length);
+
+ if (type == SLOW_OAM_INFO_TYPE_END_OF_TLV) {
+ /*
+ * As IEEE Std 802.3-2015 says for the End of TLV Marker,
+ * "(the length and value of the Type 0x00 TLV can be ignored)".
+ */
+ return;
+ }
+
+ /* length includes the type and length fields */
+ if (length < sizeof(struct slow_oam_tlv_header_t)) {
+ ND_PRINT("\n\t ERROR: illegal length - should be >= %zu",
+ sizeof(struct slow_oam_tlv_header_t));
+ return;
+ }
+
+ if (tlen < length)
+ goto tooshort;
+ ND_TCHECK_LEN(tptr, length);
+
+ hexdump = FALSE;
+ switch (type) {
+ case SLOW_OAM_LINK_EVENT_ERR_SYM_PER: /* identical format - fall through */
+ case SLOW_OAM_LINK_EVENT_ERR_FRM:
+ case SLOW_OAM_LINK_EVENT_ERR_FRM_PER:
+ case SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM:
+ tlv.slow_oam_link_event = (const struct slow_oam_link_event_t *)tptr;
+
+ if (GET_U_1(tlv.slow_oam_link_event->event_length) !=
+ sizeof(struct slow_oam_link_event_t)) {
+ ND_PRINT("\n\t ERROR: illegal length - should be %zu",
+ sizeof(struct slow_oam_link_event_t));
+ hexdump = TRUE;
+ goto badlength_event_notif;
+ }
+
+ ND_PRINT("\n\t Timestamp %u ms, Errored Window %" PRIu64
+ "\n\t Errored Threshold %" PRIu64
+ "\n\t Errors %" PRIu64
+ "\n\t Error Running Total %" PRIu64
+ "\n\t Event Running Total %u",
+ GET_BE_U_2(tlv.slow_oam_link_event->time_stamp)*100,
+ GET_BE_U_8(tlv.slow_oam_link_event->window),
+ GET_BE_U_8(tlv.slow_oam_link_event->threshold),
+ GET_BE_U_8(tlv.slow_oam_link_event->errors),
+ GET_BE_U_8(tlv.slow_oam_link_event->errors_running_total),
+ GET_BE_U_4(tlv.slow_oam_link_event->event_running_total));
+ break;
+
+ case SLOW_OAM_LINK_EVENT_ORG_SPECIFIC:
+ hexdump = TRUE;
+ break;
+
+ default:
+ hexdump = TRUE;
+ break;
+ }
+
+ badlength_event_notif:
+ /* do we also want to see a hex dump ? */
+ if (ndo->ndo_vflag > 1 || hexdump==TRUE) {
+ print_unknown_data(ndo, tptr, "\n\t ",
+ length);
+ }
+
+ tlen -= length;
+ tptr += length;
+ }
+ break;
+
+ case SLOW_OAM_CODE_LOOPBACK_CTRL:
+ tlv.slow_oam_loopbackctrl = (const struct slow_oam_loopbackctrl_t *)tptr;
+ if (tlen < sizeof(*tlv.slow_oam_loopbackctrl))
+ goto tooshort;
+ command = GET_U_1(tlv.slow_oam_loopbackctrl->command);
+ ND_PRINT("\n\t Command %s (%u)",
+ tok2str(slow_oam_loopbackctrl_cmd_values,
+ "Unknown",
+ command),
+ command);
+ tptr ++;
+ tlen --;
+ break;
+
+ /*
+ * FIXME those are the defined codes that lack a decoder
+ * you are welcome to contribute code ;-)
+ */
+ case SLOW_OAM_CODE_VAR_REQUEST:
+ case SLOW_OAM_CODE_VAR_RESPONSE:
+ case SLOW_OAM_CODE_PRIVATE:
+ default:
+ if (ndo->ndo_vflag <= 1) {
+ print_unknown_data(ndo, tptr, "\n\t ", tlen);
+ }
+ break;
+ }
+ return;
+
+tooshort:
+ ND_PRINT("\n\t\t packet is too short");
+}