/* * 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. * * Original code by Hannes Gredler (hannes@gredler.at) */ /* \summary: IEEE 802.1ag Connectivity Fault Management (CFM) protocols printer */ #include #include "netdissect-stdinc.h" #include "netdissect.h" #include "extract.h" #include "addrtoname.h" #include "oui.h" #include "af.h" struct cfm_common_header_t { nd_uint8_t mdlevel_version; nd_uint8_t opcode; nd_uint8_t flags; nd_uint8_t first_tlv_offset; }; #define CFM_VERSION 0 #define CFM_EXTRACT_VERSION(x) ((x)&0x1f) #define CFM_EXTRACT_MD_LEVEL(x) (((x)&0xe0)>>5) #define CFM_OPCODE_CCM 1 #define CFM_OPCODE_LBR 2 #define CFM_OPCODE_LBM 3 #define CFM_OPCODE_LTR 4 #define CFM_OPCODE_LTM 5 static const struct tok cfm_opcode_values[] = { { CFM_OPCODE_CCM, "Continuity Check Message"}, { CFM_OPCODE_LBR, "Loopback Reply"}, { CFM_OPCODE_LBM, "Loopback Message"}, { CFM_OPCODE_LTR, "Linktrace Reply"}, { CFM_OPCODE_LTM, "Linktrace Message"}, { 0, NULL} }; /* * Message Formats. */ struct cfm_ccm_t { nd_uint32_t sequence; nd_uint16_t ma_epi; nd_byte names[48]; nd_byte itu_t_y_1731[16]; }; /* * Timer Bases for the CCM Interval field. * Expressed in units of seconds. */ static const float ccm_interval_base[8] = {0.0f, 0.003333f, 0.01f, 0.1f, 1.0f, 10.0f, 60.0f, 600.0f}; #define CCM_INTERVAL_MIN_MULTIPLIER 3.25 #define CCM_INTERVAL_MAX_MULTIPLIER 3.5 #define CFM_CCM_RDI_FLAG 0x80 #define CFM_EXTRACT_CCM_INTERVAL(x) ((x)&0x07) #define CFM_CCM_MD_FORMAT_8021 0 #define CFM_CCM_MD_FORMAT_NONE 1 #define CFM_CCM_MD_FORMAT_DNS 2 #define CFM_CCM_MD_FORMAT_MAC 3 #define CFM_CCM_MD_FORMAT_CHAR 4 static const struct tok cfm_md_nameformat_values[] = { { CFM_CCM_MD_FORMAT_8021, "IEEE 802.1"}, { CFM_CCM_MD_FORMAT_NONE, "No MD Name present"}, { CFM_CCM_MD_FORMAT_DNS, "DNS string"}, { CFM_CCM_MD_FORMAT_MAC, "MAC + 16Bit Integer"}, { CFM_CCM_MD_FORMAT_CHAR, "Character string"}, { 0, NULL} }; #define CFM_CCM_MA_FORMAT_8021 0 #define CFM_CCM_MA_FORMAT_VID 1 #define CFM_CCM_MA_FORMAT_CHAR 2 #define CFM_CCM_MA_FORMAT_INT 3 #define CFM_CCM_MA_FORMAT_VPN 4 static const struct tok cfm_ma_nameformat_values[] = { { CFM_CCM_MA_FORMAT_8021, "IEEE 802.1"}, { CFM_CCM_MA_FORMAT_VID, "Primary VID"}, { CFM_CCM_MA_FORMAT_CHAR, "Character string"}, { CFM_CCM_MA_FORMAT_INT, "16Bit Integer"}, { CFM_CCM_MA_FORMAT_VPN, "RFC2685 VPN-ID"}, { 0, NULL} }; struct cfm_lbm_t { nd_uint32_t transaction_id; }; struct cfm_ltm_t { nd_uint32_t transaction_id; nd_uint8_t ttl; nd_mac_addr original_mac; nd_mac_addr target_mac; }; static const struct tok cfm_ltm_flag_values[] = { { 0x80, "Use Forwarding-DB only"}, { 0, NULL} }; struct cfm_ltr_t { nd_uint32_t transaction_id; nd_uint8_t ttl; nd_uint8_t replay_action; }; static const struct tok cfm_ltr_flag_values[] = { { 0x80, "UseFDB Only"}, { 0x40, "FwdYes"}, { 0x20, "Terminal MEP"}, { 0, NULL} }; static const struct tok cfm_ltr_replay_action_values[] = { { 1, "Exact Match"}, { 2, "Filtering DB"}, { 3, "MIP CCM DB"}, { 0, NULL} }; #define CFM_TLV_END 0 #define CFM_TLV_SENDER_ID 1 #define CFM_TLV_PORT_STATUS 2 #define CFM_TLV_INTERFACE_STATUS 3 #define CFM_TLV_DATA 4 #define CFM_TLV_REPLY_INGRESS 5 #define CFM_TLV_REPLY_EGRESS 6 #define CFM_TLV_PRIVATE 31 static const struct tok cfm_tlv_values[] = { { CFM_TLV_END, "End"}, { CFM_TLV_SENDER_ID, "Sender ID"}, { CFM_TLV_PORT_STATUS, "Port status"}, { CFM_TLV_INTERFACE_STATUS, "Interface status"}, { CFM_TLV_DATA, "Data"}, { CFM_TLV_REPLY_INGRESS, "Reply Ingress"}, { CFM_TLV_REPLY_EGRESS, "Reply Egress"}, { CFM_TLV_PRIVATE, "Organization Specific"}, { 0, NULL} }; /* * TLVs */ struct cfm_tlv_header_t { nd_uint8_t type; nd_uint16_t length; }; /* FIXME define TLV formats */ static const struct tok cfm_tlv_port_status_values[] = { { 1, "Blocked"}, { 2, "Up"}, { 0, NULL} }; static const struct tok cfm_tlv_interface_status_values[] = { { 1, "Up"}, { 2, "Down"}, { 3, "Testing"}, { 5, "Dormant"}, { 6, "not present"}, { 7, "lower Layer down"}, { 0, NULL} }; #define CFM_CHASSIS_ID_CHASSIS_COMPONENT 1 #define CFM_CHASSIS_ID_INTERFACE_ALIAS 2 #define CFM_CHASSIS_ID_PORT_COMPONENT 3 #define CFM_CHASSIS_ID_MAC_ADDRESS 4 #define CFM_CHASSIS_ID_NETWORK_ADDRESS 5 #define CFM_CHASSIS_ID_INTERFACE_NAME 6 #define CFM_CHASSIS_ID_LOCAL 7 static const struct tok cfm_tlv_senderid_chassisid_values[] = { { 0, "Reserved"}, { CFM_CHASSIS_ID_CHASSIS_COMPONENT, "Chassis component"}, { CFM_CHASSIS_ID_INTERFACE_ALIAS, "Interface alias"}, { CFM_CHASSIS_ID_PORT_COMPONENT, "Port component"}, { CFM_CHASSIS_ID_MAC_ADDRESS, "MAC address"}, { CFM_CHASSIS_ID_NETWORK_ADDRESS, "Network address"}, { CFM_CHASSIS_ID_INTERFACE_NAME, "Interface name"}, { CFM_CHASSIS_ID_LOCAL, "Locally assigned"}, { 0, NULL} }; static int cfm_network_addr_print(netdissect_options *ndo, const u_char *tptr, const u_int length) { u_int network_addr_type; u_int hexdump = FALSE; /* * Although AFIs are typically 2 octets wide, * 802.1ab specifies that this field width * is only one octet. */ if (length < 1) { ND_PRINT("\n\t Network Address Type (invalid, no data"); return hexdump; } /* The calling function must make any due ND_TCHECK calls. */ network_addr_type = GET_U_1(tptr); ND_PRINT("\n\t Network Address Type %s (%u)", tok2str(af_values, "Unknown", network_addr_type), network_addr_type); /* * Resolve the passed in Address. */ switch(network_addr_type) { case AFNUM_INET: if (length != 1 + 4) { ND_PRINT("(invalid IPv4 address length %u)", length - 1); hexdump = TRUE; break; } ND_PRINT(", %s", GET_IPADDR_STRING(tptr + 1)); break; case AFNUM_INET6: if (length != 1 + 16) { ND_PRINT("(invalid IPv6 address length %u)", length - 1); hexdump = TRUE; break; } ND_PRINT(", %s", GET_IP6ADDR_STRING(tptr + 1)); break; default: hexdump = TRUE; break; } return hexdump; } void cfm_print(netdissect_options *ndo, const u_char *pptr, u_int length) { const struct cfm_common_header_t *cfm_common_header; uint8_t mdlevel_version, opcode, flags, first_tlv_offset; const struct cfm_tlv_header_t *cfm_tlv_header; const uint8_t *tptr, *tlv_ptr; const uint8_t *namesp; u_int names_data_remaining; uint8_t md_nameformat, md_namelength; const uint8_t *md_name; uint8_t ma_nameformat, ma_namelength; const uint8_t *ma_name; u_int hexdump, tlen, cfm_tlv_len, cfm_tlv_type, ccm_interval; union { const struct cfm_ccm_t *cfm_ccm; const struct cfm_lbm_t *cfm_lbm; const struct cfm_ltm_t *cfm_ltm; const struct cfm_ltr_t *cfm_ltr; } msg_ptr; ndo->ndo_protocol = "cfm"; tptr=pptr; cfm_common_header = (const struct cfm_common_header_t *)pptr; if (length < sizeof(*cfm_common_header)) goto tooshort; ND_TCHECK_SIZE(cfm_common_header); /* * Sanity checking of the header. */ mdlevel_version = GET_U_1(cfm_common_header->mdlevel_version); if (CFM_EXTRACT_VERSION(mdlevel_version) != CFM_VERSION) { ND_PRINT("CFMv%u not supported, length %u", CFM_EXTRACT_VERSION(mdlevel_version), length); return; } opcode = GET_U_1(cfm_common_header->opcode); ND_PRINT("CFMv%u %s, MD Level %u, length %u", CFM_EXTRACT_VERSION(mdlevel_version), tok2str(cfm_opcode_values, "unknown (%u)", opcode), CFM_EXTRACT_MD_LEVEL(mdlevel_version), length); /* * In non-verbose mode just print the opcode and md-level. */ if (ndo->ndo_vflag < 1) { return; } flags = GET_U_1(cfm_common_header->flags); first_tlv_offset = GET_U_1(cfm_common_header->first_tlv_offset); ND_PRINT("\n\tFirst TLV offset %u", first_tlv_offset); tptr += sizeof(struct cfm_common_header_t); tlen = length - sizeof(struct cfm_common_header_t); /* * Sanity check the first TLV offset. */ if (first_tlv_offset > tlen) { ND_PRINT(" (too large, must be <= %u)", tlen); return; } switch (opcode) { case CFM_OPCODE_CCM: msg_ptr.cfm_ccm = (const struct cfm_ccm_t *)tptr; if (first_tlv_offset < sizeof(*msg_ptr.cfm_ccm)) { ND_PRINT(" (too small 1, must be >= %zu)", sizeof(*msg_ptr.cfm_ccm)); return; } if (tlen < sizeof(*msg_ptr.cfm_ccm)) goto tooshort; ND_TCHECK_SIZE(msg_ptr.cfm_ccm); ccm_interval = CFM_EXTRACT_CCM_INTERVAL(flags); ND_PRINT(", Flags [CCM Interval %u%s]", ccm_interval, flags & CFM_CCM_RDI_FLAG ? ", RDI" : ""); /* * Resolve the CCM interval field. */ if (ccm_interval) { ND_PRINT("\n\t CCM Interval %.3fs" ", min CCM Lifetime %.3fs, max CCM Lifetime %.3fs", ccm_interval_base[ccm_interval], ccm_interval_base[ccm_interval] * CCM_INTERVAL_MIN_MULTIPLIER, ccm_interval_base[ccm_interval] * CCM_INTERVAL_MAX_MULTIPLIER); } ND_PRINT("\n\t Sequence Number 0x%08x, MA-End-Point-ID 0x%04x", GET_BE_U_4(msg_ptr.cfm_ccm->sequence), GET_BE_U_2(msg_ptr.cfm_ccm->ma_epi)); namesp = msg_ptr.cfm_ccm->names; names_data_remaining = sizeof(msg_ptr.cfm_ccm->names); /* * Resolve the MD fields. */ md_nameformat = GET_U_1(namesp); namesp++; names_data_remaining--; /* We know this is != 0 */ if (md_nameformat != CFM_CCM_MD_FORMAT_NONE) { md_namelength = GET_U_1(namesp); namesp++; names_data_remaining--; /* We know this is !=0 */ ND_PRINT("\n\t MD Name Format %s (%u), MD Name length %u", tok2str(cfm_md_nameformat_values, "Unknown", md_nameformat), md_nameformat, md_namelength); /* * -3 for the MA short name format and length and one byte * of MA short name. */ if (md_namelength > names_data_remaining - 3) { ND_PRINT(" (too large, must be <= %u)", names_data_remaining - 2); return; } md_name = namesp; ND_PRINT("\n\t MD Name: "); switch (md_nameformat) { case CFM_CCM_MD_FORMAT_DNS: case CFM_CCM_MD_FORMAT_CHAR: nd_printjnp(ndo, md_name, md_namelength); break; case CFM_CCM_MD_FORMAT_MAC: if (md_namelength == MAC_ADDR_LEN) { ND_PRINT("\n\t MAC %s", GET_ETHERADDR_STRING(md_name)); } else { ND_PRINT("\n\t MAC (length invalid)"); } break; /* FIXME add printers for those MD formats - hexdump for now */ case CFM_CCM_MA_FORMAT_8021: default: print_unknown_data(ndo, md_name, "\n\t ", md_namelength); } namesp += md_namelength; names_data_remaining -= md_namelength; } else { ND_PRINT("\n\t MD Name Format %s (%u)", tok2str(cfm_md_nameformat_values, "Unknown", md_nameformat), md_nameformat); } /* * Resolve the MA fields. */ ma_nameformat = GET_U_1(namesp); namesp++; names_data_remaining--; /* We know this is != 0 */ ma_namelength = GET_U_1(namesp); namesp++; names_data_remaining--; /* We know this is != 0 */ ND_PRINT("\n\t MA Name-Format %s (%u), MA name length %u", tok2str(cfm_ma_nameformat_values, "Unknown", ma_nameformat), ma_nameformat, ma_namelength); if (ma_namelength > names_data_remaining) { ND_PRINT(" (too large, must be <= %u)", names_data_remaining); return; } ma_name = namesp; ND_PRINT("\n\t MA Name: "); switch (ma_nameformat) { case CFM_CCM_MA_FORMAT_CHAR: nd_printjnp(ndo, ma_name, ma_namelength); break; /* FIXME add printers for those MA formats - hexdump for now */ case CFM_CCM_MA_FORMAT_8021: case CFM_CCM_MA_FORMAT_VID: case CFM_CCM_MA_FORMAT_INT: case CFM_CCM_MA_FORMAT_VPN: default: print_unknown_data(ndo, ma_name, "\n\t ", ma_namelength); } break; case CFM_OPCODE_LTM: msg_ptr.cfm_ltm = (const struct cfm_ltm_t *)tptr; if (first_tlv_offset < sizeof(*msg_ptr.cfm_ltm)) { ND_PRINT(" (too small 4, must be >= %zu)", sizeof(*msg_ptr.cfm_ltm)); return; } if (tlen < sizeof(*msg_ptr.cfm_ltm)) goto tooshort; ND_TCHECK_SIZE(msg_ptr.cfm_ltm); ND_PRINT(", Flags [%s]", bittok2str(cfm_ltm_flag_values, "none", flags)); ND_PRINT("\n\t Transaction-ID 0x%08x, ttl %u", GET_BE_U_4(msg_ptr.cfm_ltm->transaction_id), GET_U_1(msg_ptr.cfm_ltm->ttl)); ND_PRINT("\n\t Original-MAC %s, Target-MAC %s", GET_ETHERADDR_STRING(msg_ptr.cfm_ltm->original_mac), GET_ETHERADDR_STRING(msg_ptr.cfm_ltm->target_mac)); break; case CFM_OPCODE_LTR: msg_ptr.cfm_ltr = (const struct cfm_ltr_t *)tptr; if (first_tlv_offset < sizeof(*msg_ptr.cfm_ltr)) { ND_PRINT(" (too small 5, must be >= %zu)", sizeof(*msg_ptr.cfm_ltr)); return; } if (tlen < sizeof(*msg_ptr.cfm_ltr)) goto tooshort; ND_TCHECK_SIZE(msg_ptr.cfm_ltr); ND_PRINT(", Flags [%s]", bittok2str(cfm_ltr_flag_values, "none", flags)); ND_PRINT("\n\t Transaction-ID 0x%08x, ttl %u", GET_BE_U_4(msg_ptr.cfm_ltr->transaction_id), GET_U_1(msg_ptr.cfm_ltr->ttl)); ND_PRINT("\n\t Replay-Action %s (%u)", tok2str(cfm_ltr_replay_action_values, "Unknown", GET_U_1(msg_ptr.cfm_ltr->replay_action)), GET_U_1(msg_ptr.cfm_ltr->replay_action)); break; /* * No message decoder yet. * Hexdump everything up until the start of the TLVs */ case CFM_OPCODE_LBR: case CFM_OPCODE_LBM: default: print_unknown_data(ndo, tptr, "\n\t ", tlen - first_tlv_offset); break; } tptr += first_tlv_offset; tlen -= first_tlv_offset; while (tlen > 0) { cfm_tlv_header = (const struct cfm_tlv_header_t *)tptr; /* Enough to read the tlv type ? */ cfm_tlv_type = GET_U_1(cfm_tlv_header->type); ND_PRINT("\n\t%s TLV (0x%02x)", tok2str(cfm_tlv_values, "Unknown", cfm_tlv_type), cfm_tlv_type); if (cfm_tlv_type == CFM_TLV_END) { /* Length is "Not present if the Type field is 0." */ return; } /* do we have the full tlv header ? */ if (tlen < sizeof(struct cfm_tlv_header_t)) goto tooshort; ND_TCHECK_LEN(tptr, sizeof(struct cfm_tlv_header_t)); cfm_tlv_len=GET_BE_U_2(cfm_tlv_header->length); ND_PRINT(", length %u", cfm_tlv_len); tptr += sizeof(struct cfm_tlv_header_t); tlen -= sizeof(struct cfm_tlv_header_t); tlv_ptr = tptr; /* do we have the full tlv ? */ if (tlen < cfm_tlv_len) goto tooshort; ND_TCHECK_LEN(tptr, cfm_tlv_len); hexdump = FALSE; switch(cfm_tlv_type) { case CFM_TLV_PORT_STATUS: if (cfm_tlv_len < 1) { ND_PRINT(" (too short, must be >= 1)"); return; } ND_PRINT(", Status: %s (%u)", tok2str(cfm_tlv_port_status_values, "Unknown", GET_U_1(tptr)), GET_U_1(tptr)); break; case CFM_TLV_INTERFACE_STATUS: if (cfm_tlv_len < 1) { ND_PRINT(" (too short, must be >= 1)"); return; } ND_PRINT(", Status: %s (%u)", tok2str(cfm_tlv_interface_status_values, "Unknown", GET_U_1(tptr)), GET_U_1(tptr)); break; case CFM_TLV_PRIVATE: if (cfm_tlv_len < 4) { ND_PRINT(" (too short, must be >= 4)"); return; } ND_PRINT(", Vendor: %s (%u), Sub-Type %u", tok2str(oui_values,"Unknown", GET_BE_U_3(tptr)), GET_BE_U_3(tptr), GET_U_1(tptr + 3)); hexdump = TRUE; break; case CFM_TLV_SENDER_ID: { u_int chassis_id_type, chassis_id_length; u_int mgmt_addr_length; if (cfm_tlv_len < 1) { ND_PRINT(" (too short, must be >= 1)"); goto next_tlv; } /* * Get the Chassis ID length and check it. * IEEE 802.1Q-2014 Section 21.5.3.1 */ chassis_id_length = GET_U_1(tptr); tptr++; tlen--; cfm_tlv_len--; if (chassis_id_length) { /* * IEEE 802.1Q-2014 Section 21.5.3.2: Chassis ID Subtype, references * IEEE 802.1AB-2005 Section 9.5.2.2, subsequently * IEEE 802.1AB-2016 Section 8.5.2.2: chassis ID subtype */ if (cfm_tlv_len < 1) { ND_PRINT("\n\t (TLV too short)"); goto next_tlv; } chassis_id_type = GET_U_1(tptr); cfm_tlv_len--; ND_PRINT("\n\t Chassis-ID Type %s (%u), Chassis-ID length %u", tok2str(cfm_tlv_senderid_chassisid_values, "Unknown", chassis_id_type), chassis_id_type, chassis_id_length); if (cfm_tlv_len < chassis_id_length) { ND_PRINT("\n\t (TLV too short)"); goto next_tlv; } /* IEEE 802.1Q-2014 Section 21.5.3.3: Chassis ID */ switch (chassis_id_type) { case CFM_CHASSIS_ID_MAC_ADDRESS: if (chassis_id_length != MAC_ADDR_LEN) { ND_PRINT(" (invalid MAC address length)"); hexdump = TRUE; break; } ND_PRINT("\n\t MAC %s", GET_ETHERADDR_STRING(tptr + 1)); break; case CFM_CHASSIS_ID_NETWORK_ADDRESS: hexdump |= cfm_network_addr_print(ndo, tptr + 1, chassis_id_length); break; case CFM_CHASSIS_ID_INTERFACE_NAME: /* fall through */ case CFM_CHASSIS_ID_INTERFACE_ALIAS: case CFM_CHASSIS_ID_LOCAL: case CFM_CHASSIS_ID_CHASSIS_COMPONENT: case CFM_CHASSIS_ID_PORT_COMPONENT: nd_printjnp(ndo, tptr + 1, chassis_id_length); break; default: hexdump = TRUE; break; } cfm_tlv_len -= chassis_id_length; tptr += 1 + chassis_id_length; tlen -= 1 + chassis_id_length; } /* * Check if there is a Management Address. * IEEE 802.1Q-2014 Section 21.5.3.4: Management Address Domain Length * This and all subsequent fields are not present if the TLV length * allows only the above fields. */ if (cfm_tlv_len == 0) { /* No, there isn't; we're done. */ break; } /* Here mgmt_addr_length stands for the management domain length. */ mgmt_addr_length = GET_U_1(tptr); tptr++; tlen--; cfm_tlv_len--; ND_PRINT("\n\t Management Address Domain Length %u", mgmt_addr_length); if (mgmt_addr_length) { /* IEEE 802.1Q-2014 Section 21.5.3.5: Management Address Domain */ if (cfm_tlv_len < mgmt_addr_length) { ND_PRINT("\n\t (TLV too short)"); goto next_tlv; } cfm_tlv_len -= mgmt_addr_length; /* * XXX - this is an OID; print it as such. */ hex_print(ndo, "\n\t Management Address Domain: ", tptr, mgmt_addr_length); tptr += mgmt_addr_length; tlen -= mgmt_addr_length; /* * IEEE 802.1Q-2014 Section 21.5.3.6: Management Address Length * This field is present if Management Address Domain Length is not 0. */ if (cfm_tlv_len < 1) { ND_PRINT(" (Management Address Length is missing)"); hexdump = TRUE; break; } /* Here mgmt_addr_length stands for the management address length. */ mgmt_addr_length = GET_U_1(tptr); tptr++; tlen--; cfm_tlv_len--; ND_PRINT("\n\t Management Address Length %u", mgmt_addr_length); if (mgmt_addr_length) { /* IEEE 802.1Q-2014 Section 21.5.3.7: Management Address */ if (cfm_tlv_len < mgmt_addr_length) { ND_PRINT("\n\t (TLV too short)"); return; } cfm_tlv_len -= mgmt_addr_length; /* * XXX - this is a TransportDomain; print it as such. */ hex_print(ndo, "\n\t Management Address: ", tptr, mgmt_addr_length); tptr += mgmt_addr_length; tlen -= mgmt_addr_length; } } break; } /* * FIXME those are the defined TLVs that lack a decoder * you are welcome to contribute code ;-) */ case CFM_TLV_DATA: case CFM_TLV_REPLY_INGRESS: case CFM_TLV_REPLY_EGRESS: default: hexdump = TRUE; break; } /* do we want to see an additional hexdump ? */ if (hexdump || ndo->ndo_vflag > 1) print_unknown_data(ndo, tlv_ptr, "\n\t ", cfm_tlv_len); next_tlv: tptr+=cfm_tlv_len; tlen-=cfm_tlv_len; } return; tooshort: ND_PRINT("\n\t\t packet is too short"); return; trunc: nd_print_trunc(ndo); }