X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/1226a40cb01eb295df68f072f43209baac4948cd..refs/pull/482/head:/print-cfm.c diff --git a/print-cfm.c b/print-cfm.c index 7f4360f0..2d67e84c 100644 --- a/print-cfm.c +++ b/print-cfm.c @@ -17,31 +17,26 @@ * Original code by Hannes Gredler (hannes@juniper.net) */ -#ifndef lint -static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/tcpdump/print-cfm.c,v 1.1 2006-10-12 10:26:12 hannes Exp $"; -#endif - #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include +#include #include -#include -#include -#include "interface.h" +#include "netdissect.h" #include "extract.h" #include "ether.h" #include "addrtoname.h" +#include "oui.h" +#include "af.h" struct cfm_common_header_t { - u_int8_t mdlevel_version; - u_int8_t opcode; - u_int8_t flags; - u_int8_t first_tlv_offset; + uint8_t mdlevel_version; + uint8_t opcode; + uint8_t flags; + uint8_t first_tlv_offset; }; #define CFM_VERSION 0 @@ -67,13 +62,13 @@ static const struct tok cfm_opcode_values[] = { * Message Formats. */ struct cfm_ccm_t { - u_int8_t sequence[4]; - u_int8_t ma_epi[2]; - u_int8_t md_nameformat; - u_int8_t md_namelength; - u_int8_t md_name[46]; /* md name and short ma name */ - u_int8_t reserved_itu[16]; - u_int8_t reserved[6]; + uint8_t sequence[4]; + uint8_t ma_epi[2]; + uint8_t md_nameformat; + uint8_t md_namelength; + uint8_t md_name[46]; /* md name and short ma name */ + uint8_t reserved_itu[16]; + uint8_t reserved[6]; }; /* @@ -118,37 +113,48 @@ static const struct tok cfm_ma_nameformat_values[] = { }; struct cfm_lbm_t { - u_int8_t transaction_id[4]; - u_int8_t reserved[4]; + uint8_t transaction_id[4]; + uint8_t reserved[4]; }; struct cfm_ltm_t { - u_int8_t transaction_id[4]; - u_int8_t egress_id[8]; - u_int8_t ttl; - u_int8_t original_mac[ETHER_ADDR_LEN]; - u_int8_t target_mac[ETHER_ADDR_LEN]; - u_int8_t reserved[3]; + uint8_t transaction_id[4]; + uint8_t egress_id[8]; + uint8_t ttl; + uint8_t original_mac[ETHER_ADDR_LEN]; + uint8_t target_mac[ETHER_ADDR_LEN]; + uint8_t reserved[3]; +}; + +static const struct tok cfm_ltm_flag_values[] = { + { 0x80, "Use Forwarding-DB only"}, + { 0, NULL} }; struct cfm_ltr_t { - u_int8_t transaction_id[4]; - u_int8_t last_egress_id[8]; - u_int8_t next_egress_id[8]; - u_int8_t ttl; - u_int8_t replay_action; - u_int8_t reserved[6]; + uint8_t transaction_id[4]; + uint8_t last_egress_id[8]; + uint8_t next_egress_id[8]; + uint8_t ttl; + uint8_t replay_action; + uint8_t reserved[6]; }; -/* - * TLVs - */ +static const struct tok cfm_ltr_flag_values[] = { + { 0x80, "UseFDB Only"}, + { 0x40, "FwdYes"}, + { 0x20, "Terminal MEP"}, + { 0, NULL} +}; -struct cfm_tlv_header_t { - u_int8_t type; - u_int8_t length[2]; +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 @@ -170,15 +176,115 @@ static const struct tok cfm_tlv_values[] = { { 0, NULL} }; +/* + * TLVs + */ + +struct cfm_tlv_header_t { + uint8_t type; + uint8_t length[2]; +}; + /* FIXME define TLV formats */ -void -cfm_print(register const u_char *pptr, register u_int length) { +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_mgmt_addr_print(netdissect_options *ndo, + register const u_char *tptr) +{ + u_int mgmt_addr_type; + u_int hexdump = FALSE; + /* + * Altough AFIs are tpically 2 octects wide, + * 802.1ab specifies that this field width + * is only once octet + */ + mgmt_addr_type = *tptr; + ND_PRINT((ndo, "\n\t Management Address Type %s (%u)", + tok2str(af_values, "Unknown", mgmt_addr_type), + mgmt_addr_type)); + + /* + * Resolve the passed in Address. + */ + switch(mgmt_addr_type) { + case AFNUM_INET: + ND_PRINT((ndo, ", %s", ipaddr_string(ndo, tptr + 1))); + break; + + case AFNUM_INET6: + ND_PRINT((ndo, ", %s", ip6addr_string(ndo, tptr + 1))); + break; + + default: + hexdump = TRUE; + break; + } + + return hexdump; +} + +/* + * The egress-ID string is a 16-Bit string plus a MAC address. + */ +static const char * +cfm_egress_id_string(netdissect_options *ndo, register const u_char *tptr) +{ + static char egress_id_buffer[80]; + + snprintf(egress_id_buffer, sizeof(egress_id_buffer), + "MAC 0x%4x-%s", + EXTRACT_16BITS(tptr), + etheraddr_string(ndo, tptr+2)); + + return egress_id_buffer; +} + +void +cfm_print(netdissect_options *ndo, + register const u_char *pptr, register u_int length) +{ const struct cfm_common_header_t *cfm_common_header; const struct cfm_tlv_header_t *cfm_tlv_header; - const u_int8_t *tptr, *tlv_tptr, *ma_name, *ma_nameformat, *ma_namelength; - u_int tlen, cfm_tlv_len, cfm_tlv_type, tlv_tlen, ccm_interval; + const uint8_t *tptr, *tlv_ptr, *ma_name, *ma_nameformat, *ma_namelength; + u_int hexdump, tlen, cfm_tlv_len, cfm_tlv_type, ccm_interval; union { @@ -190,32 +296,31 @@ cfm_print(register const u_char *pptr, register u_int length) { tptr=pptr; cfm_common_header = (const struct cfm_common_header_t *)pptr; - TCHECK(*cfm_common_header); + ND_TCHECK(*cfm_common_header); /* * Sanity checking of the header. */ if (CFM_EXTRACT_VERSION(cfm_common_header->mdlevel_version) != CFM_VERSION) { - printf("CFMv%u not supported, length %u", - CFM_EXTRACT_VERSION(cfm_common_header->mdlevel_version), length); + ND_PRINT((ndo, "CFMv%u not supported, length %u", + CFM_EXTRACT_VERSION(cfm_common_header->mdlevel_version), length)); return; } - printf("CFMv%u %s, length %u", + ND_PRINT((ndo, "CFMv%u %s, MD Level %u, length %u", CFM_EXTRACT_VERSION(cfm_common_header->mdlevel_version), tok2str(cfm_opcode_values, "unknown (%u)", cfm_common_header->opcode), - length); + CFM_EXTRACT_MD_LEVEL(cfm_common_header->mdlevel_version), + length)); /* - * In non-verbose mode just lets print the opcode and bail. + * In non-verbose mode just print the opcode and md-level. */ - if (vflag < 1) { + if (ndo->ndo_vflag < 1) { return; } - printf("\n\tMD Level %u, First TLV offset %u", - CFM_EXTRACT_MD_LEVEL(cfm_common_header->mdlevel_version), - cfm_common_header->first_tlv_offset); + ND_PRINT((ndo, "\n\tFirst TLV offset %u", cfm_common_header->first_tlv_offset)); tptr += sizeof(const struct cfm_common_header_t); tlen = length - sizeof(struct cfm_common_header_t); @@ -225,49 +330,53 @@ cfm_print(register const u_char *pptr, register u_int length) { msg_ptr.cfm_ccm = (const struct cfm_ccm_t *)tptr; ccm_interval = CFM_EXTRACT_CCM_INTERVAL(cfm_common_header->flags); - printf(", Flags [CCM Interval %u%s]", + ND_PRINT((ndo, ", Flags [CCM Interval %u%s]", ccm_interval, cfm_common_header->flags & CFM_CCM_RDI_FLAG ? - ", RDI" : ""); + ", RDI" : "")); /* * Resolve the CCM interval field. */ if (ccm_interval) { - printf("\n\t CCM Interval %.3fs" + ND_PRINT((ndo, "\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); + ccm_interval_base[ccm_interval] * CCM_INTERVAL_MAX_MULTIPLIER)); } - printf("\n\t Sequence Number 0x%08x, MA-End-Point-ID 0x%04x", + ND_PRINT((ndo, "\n\t Sequence Number 0x%08x, MA-End-Point-ID 0x%04x", EXTRACT_32BITS(msg_ptr.cfm_ccm->sequence), - EXTRACT_16BITS(msg_ptr.cfm_ccm->ma_epi)); + EXTRACT_16BITS(msg_ptr.cfm_ccm->ma_epi))); /* * Resolve the MD fields. */ - printf("\n\t MD Name Format %s (%u), MD Name length %u", + ND_PRINT((ndo, "\n\t MD Name Format %s (%u), MD Name length %u", tok2str(cfm_md_nameformat_values, "Unknown", msg_ptr.cfm_ccm->md_nameformat), msg_ptr.cfm_ccm->md_nameformat, - msg_ptr.cfm_ccm->md_namelength); + msg_ptr.cfm_ccm->md_namelength)); if (msg_ptr.cfm_ccm->md_nameformat != CFM_CCM_MD_FORMAT_NONE) { - printf("\n\t MD Name: "); + ND_PRINT((ndo, "\n\t MD Name: ")); switch (msg_ptr.cfm_ccm->md_nameformat) { case CFM_CCM_MD_FORMAT_DNS: case CFM_CCM_MD_FORMAT_CHAR: - safeputs(msg_ptr.cfm_ccm->md_name, msg_ptr.cfm_ccm->md_namelength); + safeputs(ndo, msg_ptr.cfm_ccm->md_name, msg_ptr.cfm_ccm->md_namelength); + break; + + case CFM_CCM_MD_FORMAT_MAC: + ND_PRINT((ndo, "\n\t MAC %s", etheraddr_string(ndo, + msg_ptr.cfm_ccm->md_name))); break; /* FIXME add printers for those MD formats - hexdump for now */ case CFM_CCM_MA_FORMAT_8021: - case CFM_CCM_MD_FORMAT_MAC: default: - print_unknown_data(msg_ptr.cfm_ccm->md_name, "\n\t ", + print_unknown_data(ndo, msg_ptr.cfm_ccm->md_name, "\n\t ", msg_ptr.cfm_ccm->md_namelength); } } @@ -280,16 +389,16 @@ cfm_print(register const u_char *pptr, register u_int length) { ma_namelength = msg_ptr.cfm_ccm->md_name + msg_ptr.cfm_ccm->md_namelength + 1; ma_name = msg_ptr.cfm_ccm->md_name + msg_ptr.cfm_ccm->md_namelength + 2; - printf("\n\t MA Name-Format %s (%u), MA name length %u", + ND_PRINT((ndo, "\n\t MA Name-Format %s (%u), MA name length %u", tok2str(cfm_ma_nameformat_values, "Unknown", *ma_nameformat), *ma_nameformat, - *ma_namelength); + *ma_namelength)); - printf("\n\t MA Name: "); + ND_PRINT((ndo, "\n\t MA Name: ")); switch (*ma_nameformat) { case CFM_CCM_MA_FORMAT_CHAR: - safeputs(ma_name, *ma_namelength); + safeputs(ndo, ma_name, *ma_namelength); break; /* FIXME add printers for those MA formats - hexdump for now */ @@ -298,21 +407,56 @@ cfm_print(register const u_char *pptr, register u_int length) { case CFM_CCM_MA_FORMAT_INT: case CFM_CCM_MA_FORMAT_VPN: default: - print_unknown_data(ma_name, "\n\t ", *ma_namelength); + 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; + + ND_PRINT((ndo, ", Flags [%s]", + bittok2str(cfm_ltm_flag_values, "none", cfm_common_header->flags))); + + ND_PRINT((ndo, "\n\t Transaction-ID 0x%08x, Egress-ID %s, ttl %u", + EXTRACT_32BITS(msg_ptr.cfm_ltm->transaction_id), + cfm_egress_id_string(ndo, msg_ptr.cfm_ltm->egress_id), + msg_ptr.cfm_ltm->ttl)); + + ND_PRINT((ndo, "\n\t Original-MAC %s, Target-MAC %s", + etheraddr_string(ndo, msg_ptr.cfm_ltm->original_mac), + etheraddr_string(ndo, msg_ptr.cfm_ltm->target_mac))); + break; + + case CFM_OPCODE_LTR: + msg_ptr.cfm_ltr = (const struct cfm_ltr_t *)tptr; + + ND_PRINT((ndo, ", Flags [%s]", + bittok2str(cfm_ltr_flag_values, "none", cfm_common_header->flags))); + + ND_PRINT((ndo, "\n\t Transaction-ID 0x%08x, Last-Egress-ID %s", + EXTRACT_32BITS(msg_ptr.cfm_ltr->transaction_id), + cfm_egress_id_string(ndo, msg_ptr.cfm_ltr->last_egress_id))); + + ND_PRINT((ndo, "\n\t Next-Egress-ID %s, ttl %u", + cfm_egress_id_string(ndo, msg_ptr.cfm_ltr->next_egress_id), + msg_ptr.cfm_ltr->ttl)); + + ND_PRINT((ndo, "\n\t Replay-Action %s (%u)", + tok2str(cfm_ltr_replay_action_values, + "Unknown", + msg_ptr.cfm_ltr->replay_action), + 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: - case CFM_OPCODE_LTR: - case CFM_OPCODE_LTM: default: if (tlen > cfm_common_header->first_tlv_offset) { - print_unknown_data(tptr, "\n\t ", + print_unknown_data(ndo, tptr, "\n\t ", tlen - cfm_common_header->first_tlv_offset); } break; @@ -327,63 +471,164 @@ cfm_print(register const u_char *pptr, register u_int length) { tptr += cfm_common_header->first_tlv_offset; tlen -= cfm_common_header->first_tlv_offset; - - while (tlen > 0) { - /* did we capture enough for fully decoding the object header ? */ - TCHECK2(*tptr, sizeof(struct cfm_tlv_header_t)); + while (tlen > 0) { cfm_tlv_header = (const struct cfm_tlv_header_t *)tptr; - cfm_tlv_len=EXTRACT_16BITS(&cfm_tlv_header->length); + + /* Enough to read the tlv type ? */ + ND_TCHECK2(*tptr, 1); cfm_tlv_type=cfm_tlv_header->type; - if (cfm_tlv_len < sizeof(struct cfm_tlv_header_t) || - cfm_tlv_len > tlen) { - print_unknown_data(tptr+sizeof(sizeof(struct cfm_tlv_header_t)),"\n\t ",tlen); - return; + if (cfm_tlv_type != CFM_TLV_END) { + /* did we capture enough for fully decoding the object header ? */ + ND_TCHECK2(*tptr, sizeof(struct cfm_tlv_header_t)); + cfm_tlv_len=EXTRACT_16BITS(&cfm_tlv_header->length); + } else { + cfm_tlv_len = 0; } - printf("\n\t %s TLV (0x%04x), length: %u", - tok2str(cfm_tlv_values, - "Unknown", - cfm_tlv_type), + ND_PRINT((ndo, "\n\t%s TLV (0x%02x), length %u", + tok2str(cfm_tlv_values, "Unknown", cfm_tlv_type), cfm_tlv_type, - cfm_tlv_len); + cfm_tlv_len)); + + /* sanity check for not walking off and infinite loop check. */ + if ((cfm_tlv_type != CFM_TLV_END) && + ((cfm_tlv_len + sizeof(struct cfm_tlv_header_t) > tlen) || + (!cfm_tlv_len))) { + print_unknown_data(ndo, tptr, "\n\t ", tlen); + return; + } - tlv_tptr=tptr+sizeof(struct cfm_tlv_header_t); - tlv_tlen=cfm_tlv_len-sizeof(struct cfm_tlv_header_t); + tptr += sizeof(struct cfm_tlv_header_t); + tlen -= sizeof(struct cfm_tlv_header_t); + tlv_ptr = tptr; /* did we capture enough for fully decoding the object ? */ - TCHECK2(*tptr, cfm_tlv_len); + if (cfm_tlv_type != CFM_TLV_END) { + ND_TCHECK2(*tptr, cfm_tlv_len); + } + hexdump = FALSE; switch(cfm_tlv_type) { + case CFM_TLV_END: + /* we are done - bail out */ + return; + + case CFM_TLV_PORT_STATUS: + ND_PRINT((ndo, ", Status: %s (%u)", + tok2str(cfm_tlv_port_status_values, "Unknown", *tptr), + *tptr)); + break; + + case CFM_TLV_INTERFACE_STATUS: + ND_PRINT((ndo, ", Status: %s (%u)", + tok2str(cfm_tlv_interface_status_values, "Unknown", *tptr), + *tptr)); + break; + + case CFM_TLV_PRIVATE: + ND_PRINT((ndo, ", Vendor: %s (%u), Sub-Type %u", + tok2str(oui_values,"Unknown", EXTRACT_24BITS(tptr)), + EXTRACT_24BITS(tptr), + *(tptr + 3))); + hexdump = TRUE; + break; + + case CFM_TLV_SENDER_ID: + { + u_int chassis_id_type, chassis_id_length; + u_int mgmt_addr_length; + + /* + * Check if there is a Chassis-ID. + */ + chassis_id_length = *tptr; + if (chassis_id_length > tlen) { + hexdump = TRUE; + break; + } + + tptr++; + tlen--; + + if (chassis_id_length) { + chassis_id_type = *tptr; + ND_PRINT((ndo, "\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)); + + switch (chassis_id_type) { + case CFM_CHASSIS_ID_MAC_ADDRESS: + ND_PRINT((ndo, "\n\t MAC %s", etheraddr_string(ndo, tptr + 1))); + break; + + case CFM_CHASSIS_ID_NETWORK_ADDRESS: + hexdump |= cfm_mgmt_addr_print(ndo, tptr); + 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: + safeputs(ndo, tptr + 1, chassis_id_length); + break; + + default: + hexdump = TRUE; + break; + } + } + + tptr += chassis_id_length; + tlen -= chassis_id_length; + + /* + * Check if there is a Management Address. + */ + mgmt_addr_length = *tptr; + if (mgmt_addr_length > tlen) { + hexdump = TRUE; + break; + } + + tptr++; + tlen--; + + if (mgmt_addr_length) { + hexdump |= cfm_mgmt_addr_print(ndo, tptr); + } + + 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_END: - case CFM_TLV_SENDER_ID: - case CFM_TLV_PORT_STATUS: - case CFM_TLV_INTERFACE_STATUS: case CFM_TLV_DATA: case CFM_TLV_REPLY_INGRESS: case CFM_TLV_REPLY_EGRESS: - case CFM_TLV_PRIVATE: default: - if (vflag <= 1) - print_unknown_data(tlv_tptr,"\n\t ",tlv_tlen); + hexdump = TRUE; break; } /* do we want to see an additional hexdump ? */ - if (vflag > 1) - print_unknown_data(tptr+sizeof(sizeof(struct cfm_tlv_header_t)),"\n\t ", - cfm_tlv_len-sizeof(struct cfm_tlv_header_t)); + if (hexdump || ndo->ndo_vflag > 1) + print_unknown_data(ndo, tlv_ptr, "\n\t ", cfm_tlv_len); tptr+=cfm_tlv_len; tlen-=cfm_tlv_len; } return; trunc: - printf("\n\t\t packet exceeded snapshot"); + ND_PRINT((ndo, "\n\t\t packet exceeded snapshot")); }