mirror of
https://github.com/the-tcpdump-group/tcpdump.git
synced 2024-11-24 18:43:39 +08:00
add support for CFM Link-trace msg, Link-trace-Reply msg, Sender-ID tlv, private tlv
This commit is contained in:
hannes
parent
cb7aa23f20
commit
ec950b64f2
254
print-cfm.c
254
print-cfm.c
@ -19,7 +19,7 @@
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#ifndef lint
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static const char rcsid[] _U_ =
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"@(#) $Header: /tcpdump/master/tcpdump/print-cfm.c,v 1.2 2006-10-20 18:07:55 hannes Exp $";
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"@(#) $Header: /tcpdump/master/tcpdump/print-cfm.c,v 1.3 2006-10-29 23:10:07 hannes Exp $";
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#endif
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#ifdef HAVE_CONFIG_H
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@ -36,6 +36,14 @@ static const char rcsid[] _U_ =
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#include "extract.h"
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#include "ether.h"
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#include "addrtoname.h"
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#include "oui.h"
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#include "af.h"
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/*
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* Prototypes
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*/
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const char * cfm_egress_id_string(register const u_char *);
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int cfm_mgmt_addr_print(register const u_char *);
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struct cfm_common_header_t {
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u_int8_t mdlevel_version;
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@ -131,6 +139,11 @@ struct cfm_ltm_t {
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u_int8_t reserved[3];
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};
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static const struct tok cfm_ltm_flag_values[] = {
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{ 0x80, "Use Forwarding-DB only"},
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{ 0, NULL}
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};
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struct cfm_ltr_t {
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u_int8_t transaction_id[4];
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u_int8_t last_egress_id[8];
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@ -140,6 +153,20 @@ struct cfm_ltr_t {
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u_int8_t reserved[6];
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};
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static const struct tok cfm_ltr_flag_values[] = {
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{ 0x80, "Forwarded"},
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{ 0x40, "Terminal MEP"},
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{ 0, NULL}
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};
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static const struct tok cfm_ltr_replay_action_values[] = {
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{ 1, "Exact Match"},
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{ 2, "Filtering DB"},
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{ 3, "MIP CCM DB"},
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{ 0, NULL}
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};
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#define CFM_TLV_END 0
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#define CFM_TLV_SENDER_ID 1
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#define CFM_TLV_PORT_STATUS 2
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@ -188,13 +215,85 @@ static const struct tok cfm_tlv_interface_status_values[] = {
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{ 0, NULL}
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};
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#define CFM_CHASSIS_ID_CHASSIS_COMPONENT 1
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#define CFM_CHASSIS_ID_INTERFACE_ALIAS 2
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#define CFM_CHASSIS_ID_PORT_COMPONENT 3
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#define CFM_CHASSIS_ID_MAC_ADDRESS 4
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#define CFM_CHASSIS_ID_NETWORK_ADDRESS 5
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#define CFM_CHASSIS_ID_INTERFACE_NAME 6
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#define CFM_CHASSIS_ID_LOCAL 7
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static const struct tok cfm_tlv_senderid_chassisid_values[] = {
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{ 0, "Reserved"},
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{ CFM_CHASSIS_ID_CHASSIS_COMPONENT, "Chassis component"},
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{ CFM_CHASSIS_ID_INTERFACE_ALIAS, "Interface alias"},
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{ CFM_CHASSIS_ID_PORT_COMPONENT, "Port component"},
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{ CFM_CHASSIS_ID_MAC_ADDRESS, "MAC address"},
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{ CFM_CHASSIS_ID_NETWORK_ADDRESS, "Network address"},
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{ CFM_CHASSIS_ID_INTERFACE_NAME, "Interface name"},
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{ CFM_CHASSIS_ID_LOCAL, "Locally assigned"},
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{ 0, NULL}
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};
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int
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cfm_mgmt_addr_print(register const u_char *tptr) {
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u_int mgmt_addr_type;
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u_int hexdump = FALSE;
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/*
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* Altough AFIs are tpically 2 octects wide,
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* 802.1ab specifies that this field width
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* is only once octet
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*/
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mgmt_addr_type = *tptr;
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printf("\n\t Management Address Type %s (%u)",
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tok2str(af_values, "Unknown", mgmt_addr_type),
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mgmt_addr_type);
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/*
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* Resolve the passed in Address.
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*/
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switch(mgmt_addr_type) {
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case AFNUM_INET:
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printf(", %s", ipaddr_string(tptr + 1));
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break;
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case AFNUM_INET6:
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printf(", %s", ip6addr_string(tptr + 1));
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break;
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default:
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hexdump = TRUE;
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break;
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}
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return hexdump;
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}
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/*
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* The egress-ID string is a 16-Bit string plus a MAC address.
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*/
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const char *
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cfm_egress_id_string(register const u_char *tptr) {
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static char egress_id_buffer[80];
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snprintf(egress_id_buffer, sizeof(egress_id_buffer),
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"MAC %0x4x-%s",
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EXTRACT_16BITS(tptr),
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etheraddr_string(tptr+2));
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return egress_id_buffer;
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}
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void
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cfm_print(register const u_char *pptr, register u_int length) {
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const struct cfm_common_header_t *cfm_common_header;
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const struct cfm_tlv_header_t *cfm_tlv_header;
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const u_int8_t *tptr, *ma_name, *ma_nameformat, *ma_namelength;
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u_int tlen, cfm_tlv_len, cfm_tlv_type, ccm_interval;
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const u_int8_t *tptr, *tlv_ptr, *ma_name, *ma_nameformat, *ma_namelength;
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u_int hexdump, tlen, cfm_tlv_len, cfm_tlv_type, ccm_interval;
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union {
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@ -217,21 +316,20 @@ cfm_print(register const u_char *pptr, register u_int length) {
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return;
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}
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printf("CFMv%u %s, length %u",
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printf("CFMv%u %s, MD Level %u, length %u",
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CFM_EXTRACT_VERSION(cfm_common_header->mdlevel_version),
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tok2str(cfm_opcode_values, "unknown (%u)", cfm_common_header->opcode),
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CFM_EXTRACT_MD_LEVEL(cfm_common_header->mdlevel_version),
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length);
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/*
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* In non-verbose mode just lets print the opcode and bail.
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* In non-verbose mode just print the opcode and md-level.
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*/
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if (vflag < 1) {
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return;
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}
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printf("\n\tMD Level %u, First TLV offset %u",
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CFM_EXTRACT_MD_LEVEL(cfm_common_header->mdlevel_version),
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cfm_common_header->first_tlv_offset);
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printf("\n\tFirst TLV offset %u", cfm_common_header->first_tlv_offset);
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tptr += sizeof(const struct cfm_common_header_t);
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tlen = length - sizeof(struct cfm_common_header_t);
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@ -279,9 +377,13 @@ cfm_print(register const u_char *pptr, register u_int length) {
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safeputs(msg_ptr.cfm_ccm->md_name, msg_ptr.cfm_ccm->md_namelength);
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break;
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case CFM_CCM_MD_FORMAT_MAC:
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printf("\n\t MAC %s", etheraddr_string(
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msg_ptr.cfm_ccm->md_name));
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break;
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/* FIXME add printers for those MD formats - hexdump for now */
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case CFM_CCM_MA_FORMAT_8021:
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case CFM_CCM_MD_FORMAT_MAC:
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default:
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print_unknown_data(msg_ptr.cfm_ccm->md_name, "\n\t ",
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msg_ptr.cfm_ccm->md_namelength);
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@ -318,14 +420,45 @@ cfm_print(register const u_char *pptr, register u_int length) {
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}
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break;
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case CFM_OPCODE_LTM:
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printf(", Flags [%s]",
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bittok2str(cfm_ltm_flag_values, "none", cfm_common_header->flags));
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printf("\n\t Transaction-ID 0x%08x, Egress-ID %s, ttl %u",
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EXTRACT_32BITS(msg_ptr.cfm_ltm->transaction_id),
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cfm_egress_id_string(msg_ptr.cfm_ltm->egress_id),
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msg_ptr.cfm_ltm->ttl);
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printf("\n\t Original-MAC %s, Target-MAC %s",
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etheraddr_string(msg_ptr.cfm_ltm->original_mac),
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etheraddr_string(msg_ptr.cfm_ltm->target_mac));
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break;
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case CFM_OPCODE_LTR:
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printf(", Flags [%s]",
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bittok2str(cfm_ltr_flag_values, "none", cfm_common_header->flags));
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printf("\n\t Transaction-ID 0x%08x, Last-Egress-ID %s",
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EXTRACT_32BITS(msg_ptr.cfm_ltr->transaction_id),
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cfm_egress_id_string(msg_ptr.cfm_ltr->last_egress_id));
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printf("\n\t Next-Egress-ID %s, ttl %u",
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cfm_egress_id_string(msg_ptr.cfm_ltr->next_egress_id),
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msg_ptr.cfm_ltr->ttl);
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printf("\n\t Replay-Action %s (%u)",
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tok2str(cfm_ltr_replay_action_values,
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"Unknown",
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msg_ptr.cfm_ltr->replay_action),
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msg_ptr.cfm_ltr->replay_action);
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break;
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/*
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* No message decoder yet.
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* Hexdump everything up until the start of the TLVs
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*/
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case CFM_OPCODE_LBR:
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case CFM_OPCODE_LBM:
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case CFM_OPCODE_LTR:
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case CFM_OPCODE_LTM:
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default:
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if (tlen > cfm_common_header->first_tlv_offset) {
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print_unknown_data(tptr, "\n\t ",
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@ -360,9 +493,7 @@ cfm_print(register const u_char *pptr, register u_int length) {
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}
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printf("\n\t%s TLV (0x%02x), length %u",
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tok2str(cfm_tlv_values,
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"Unknown",
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cfm_tlv_type),
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tok2str(cfm_tlv_values, "Unknown", cfm_tlv_type),
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cfm_tlv_type,
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cfm_tlv_len);
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@ -376,45 +507,128 @@ cfm_print(register const u_char *pptr, register u_int length) {
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tptr += sizeof(struct cfm_tlv_header_t);
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tlen -= sizeof(struct cfm_tlv_header_t);
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tlv_ptr = tptr;
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/* did we capture enough for fully decoding the object ? */
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if (cfm_tlv_type != CFM_TLV_END) {
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TCHECK2(*tptr, cfm_tlv_len);
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}
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hexdump = FALSE;
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switch(cfm_tlv_type) {
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case CFM_TLV_END:
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/* we are done - bail out */
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return;
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case CFM_TLV_PORT_STATUS:
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printf(", Status: %s (%u)",
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tok2str(cfm_tlv_port_status_values, "Unknown", *tptr),
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*tptr);
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break;
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case CFM_TLV_INTERFACE_STATUS:
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printf(", Status: %s (%u)",
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tok2str(cfm_tlv_interface_status_values, "Unknown", *tptr),
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*tptr);
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break;
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case CFM_TLV_PRIVATE:
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printf(", Vendor: %s (%u), Sub-Type %u",
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tok2str(oui_values,"Unknown", EXTRACT_24BITS(tptr)),
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EXTRACT_24BITS(tptr),
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*(tptr+3));
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hexdump = TRUE;
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break;
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case CFM_TLV_SENDER_ID:
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{
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u_int chassis_id_type, chassis_id_length;
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u_int mgmt_addr_length;
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/*
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* Check if there is a Chassis-ID.
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*/
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chassis_id_length = *tptr;
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if (chassis_id_length > tlen) {
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hexdump = TRUE;
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break;
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}
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tptr++;
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tlen--;
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if (chassis_id_length) {
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chassis_id_type = *tptr;
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printf("\n\t Chassis-ID Type %s (%u), Chassis-ID length %u",
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tok2str(cfm_tlv_senderid_chassisid_values,
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"Unknown",
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chassis_id_type),
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chassis_id_type,
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chassis_id_length);
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switch (chassis_id_type) {
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case CFM_CHASSIS_ID_MAC_ADDRESS:
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printf("\n\t MAC %s", etheraddr_string(tptr+1));
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break;
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case CFM_CHASSIS_ID_NETWORK_ADDRESS:
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hexdump |= cfm_mgmt_addr_print(tptr);
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break;
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case CFM_CHASSIS_ID_INTERFACE_NAME: /* fall through */
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case CFM_CHASSIS_ID_INTERFACE_ALIAS:
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case CFM_CHASSIS_ID_LOCAL:
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case CFM_CHASSIS_ID_CHASSIS_COMPONENT:
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case CFM_CHASSIS_ID_PORT_COMPONENT:
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safeputs(tptr+1, chassis_id_length);
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break;
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default:
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hexdump = TRUE;
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break;
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}
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}
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tptr += chassis_id_length;
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tlen -= chassis_id_length;
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/*
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* Check if there is a Management Address.
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*/
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mgmt_addr_length = *tptr;
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if (mgmt_addr_length > tlen) {
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hexdump = TRUE;
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break;
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}
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tptr++;
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tlen--;
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if (mgmt_addr_length) {
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hexdump |= cfm_mgmt_addr_print(tptr);
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}
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tptr += mgmt_addr_length;
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tlen -= mgmt_addr_length;
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}
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break;
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/*
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* FIXME those are the defined TLVs that lack a decoder
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* you are welcome to contribute code ;-)
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*/
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case CFM_TLV_SENDER_ID:
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case CFM_TLV_DATA:
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case CFM_TLV_REPLY_INGRESS:
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case CFM_TLV_REPLY_EGRESS:
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case CFM_TLV_PRIVATE:
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default:
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if (vflag <= 1)
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print_unknown_data(tptr,"\n\t ",cfm_tlv_len);
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hexdump = TRUE;
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break;
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}
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/* do we want to see an additional hexdump ? */
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if (vflag > 1)
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print_unknown_data(tptr, "\n\t ", cfm_tlv_len);
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if (hexdump || vflag > 1)
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print_unknown_data(tlv_ptr, "\n\t ", cfm_tlv_len);
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tptr+=cfm_tlv_len;
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tlen-=cfm_tlv_len;
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