/* * 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 */ #include <config.h> #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"); }