/*

* 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 */

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif

#include "netdissect-stdinc.h"

#include "netdissect.h"

#include "extract.h"

#include "addrtoname.h"

#include "oui.h"

static const char tstr[] = " [|slow]";

#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 {

};

#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 {

};

struct slow_oam_variablerequest_t {

nd_uint8_t branch;

nd_uint16_t leaf;

};

struct slow_oam_variableresponse_t {

};

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 {

};

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 {

};

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;

ND_TCHECK_1(pptr);

subtype = EXTRACT_U_1(pptr);

/*

* Sanity checking of the header.

*/

switch (subtype) {

case SLOW_PROTO_LACP:

if (len < 2)

goto tooshort;

ND_TCHECK_1(pptr + 1);

if (EXTRACT_U_1(pptr + 1) != LACP_VERSION) {

ND_PRINT("LACP version %u packet not supported", EXTRACT_U_1(pptr + 1));

return;

}

print_version = 1;

break;

case SLOW_PROTO_MARKER:

if (len < 2)

goto tooshort;

ND_TCHECK_1(pptr + 1);

if (EXTRACT_U_1(pptr + 1) != MARKER_VERSION) {

ND_PRINT("MARKER version %u packet not supported", EXTRACT_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),

EXTRACT_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");

return;

trunc:

ND_PRINT("%s", tstr);

}

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 ? */

ND_TCHECK_LEN(tptr, sizeof(struct tlv_header_t));

tlv_header = (const struct tlv_header_t *)tptr;

tlv_type = EXTRACT_U_1(tlv_header->type);

tlv_len = EXTRACT_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 >= %lu",

(unsigned long) 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 %lu",

(unsigned long) (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]",

etheraddr_string(ndo, tlv_ptr.lacp_tlv_actor_partner_info->sys),

EXTRACT_BE_U_2(tlv_ptr.lacp_tlv_actor_partner_info->sys_pri),

EXTRACT_BE_U_2(tlv_ptr.lacp_tlv_actor_partner_info->key),

EXTRACT_BE_U_2(tlv_ptr.lacp_tlv_actor_partner_info->port),

EXTRACT_BE_U_2(tlv_ptr.lacp_tlv_actor_partner_info->port_pri),

bittok2str(lacp_tlv_actor_partner_info_state_values,

"none",

EXTRACT_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 %lu",

(unsigned long) (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",

EXTRACT_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 %lu",

(unsigned long) (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",

etheraddr_string(ndo, tlv_ptr.marker_tlv_marker_info->req_sys),

EXTRACT_BE_U_2(tlv_ptr.marker_tlv_marker_info->req_port),

EXTRACT_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");

return;

trunc:

ND_PRINT("%s", tstr);

}

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 = EXTRACT_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",

EXTRACT_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 = EXTRACT_U_1(ptr.slow_oam_tlv_header->type);

length = EXTRACT_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 >= %u",

(u_int)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 (EXTRACT_U_1(tlv.slow_oam_info->info_length) !=

sizeof(struct slow_oam_info_t)) {

ND_PRINT("\n\t ERROR: illegal length - should be %lu",

(unsigned long) sizeof(struct slow_oam_info_t));

hexdump = TRUE;

goto badlength_code_info;

}

ND_PRINT("\n\t OAM-Version %u, Revision %u",

EXTRACT_U_1(tlv.slow_oam_info->oam_version),

EXTRACT_BE_U_2(tlv.slow_oam_info->revision));

state = EXTRACT_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",

EXTRACT_U_1(tlv.slow_oam_info->oam_config)),

EXTRACT_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",

EXTRACT_BE_U_3(tlv.slow_oam_info->oui)),

EXTRACT_BE_U_3(tlv.slow_oam_info->oui),

EXTRACT_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_TCHECK_2(tptr);

ND_PRINT("\n\t Sequence Number %u", EXTRACT_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;

ND_TCHECK_SIZE(ptr.slow_oam_tlv_header);

type = EXTRACT_U_1(ptr.slow_oam_tlv_header->type);

length = EXTRACT_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 >= %u",

(u_int)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 (EXTRACT_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 %lu",

(unsigned long) 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",

EXTRACT_BE_U_2(tlv.slow_oam_link_event->time_stamp)*100,

EXTRACT_BE_U_8(tlv.slow_oam_link_event->window),

EXTRACT_BE_U_8(tlv.slow_oam_link_event->threshold),

EXTRACT_BE_U_8(tlv.slow_oam_link_event->errors),

EXTRACT_BE_U_8(tlv.slow_oam_link_event->errors_running_total),

EXTRACT_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;

ND_TCHECK_SIZE(tlv.slow_oam_loopbackctrl);

command = EXTRACT_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");

return;

trunc:

ND_PRINT("%s", tstr);

}