*/
-#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 <tcpdump-stdinc.h>
#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#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
* 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];
};
/*
};
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
{ 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;
+
+#ifdef INET6
+ case AFNUM_INET6:
+ ND_PRINT((ndo, ", %s", ip6addr_string(ndo, tptr + 1)));
+ break;
+#endif
+
+ 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 {
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);
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);
}
}
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 */
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;
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"));
}
projects / tcpdump / blobdiff