diff options
Diffstat (limited to 'print-slow.c')
| -rw-r--r-- | print-slow.c | 737 |
1 files changed, 737 insertions, 0 deletions
diff --git a/print-slow.c b/print-slow.c new file mode 100644 index 00000000..11838180 --- /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"); +} |