* Copyright (c) 1998-2006 The TCPDUMP project

/*
* 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 ([email protected])
*/

#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: print-slow.c,v 1.11 2024/09/02 16:15:33 christos Exp $");
#endif

/* \summary: IEEE "slow protocols" (802.3ad/802.3ah) printer */

#include <config.h>

#include "netdissect-stdinc.h"

#define ND_LONGJMP_FROM_TCHECK
#include "netdissect.h"
#include "extract.h"
#include "addrtoname.h"
#include "oui.h"

#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 {
nd_uint8_t info_type;
nd_uint8_t info_length;
nd_uint8_t oam_version;
nd_uint16_t revision;
nd_uint8_t state;
nd_uint8_t oam_config;
nd_uint16_t oam_pdu_config;
nd_uint24_t oui;
nd_uint32_t vendor_private;
};

#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 {
nd_uint8_t event_type;
nd_uint8_t event_length;
nd_uint16_t time_stamp;
nd_uint64_t window;
nd_uint64_t threshold;
nd_uint64_t errors;
nd_uint64_t errors_running_total;
nd_uint32_t event_running_total;
};

struct slow_oam_variablerequest_t {
nd_uint8_t branch;
nd_uint16_t leaf;
};

struct slow_oam_variableresponse_t {
nd_uint8_t branch;
nd_uint16_t leaf;
nd_uint8_t length;
};

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 {
nd_uint16_t sys_pri;
nd_mac_addr sys;
nd_uint16_t key;
nd_uint16_t port_pri;
nd_uint16_t port;
nd_uint8_t state;
nd_byte pad[3];
};

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 {
nd_uint16_t req_port;
nd_mac_addr req_sys;
nd_uint32_t req_trans_id;
nd_byte pad[2];
};

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;
subtype = GET_U_1(pptr);

/*
* Sanity checking of the header.
*/
switch (subtype) {
case SLOW_PROTO_LACP:
if (len < 2)
goto tooshort;
if (GET_U_1(pptr + 1) != LACP_VERSION) {
ND_PRINT("LACP version %u packet not supported",
GET_U_1(pptr + 1));
return;
}
print_version = 1;
break;

case SLOW_PROTO_MARKER:
if (len < 2)
goto tooshort;
if (GET_U_1(pptr + 1) != MARKER_VERSION) {
ND_PRINT("MARKER version %u packet not supported",
GET_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),
GET_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");
}

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 ? */
tlv_header = (const struct tlv_header_t *)tptr;
tlv_type = GET_U_1(tlv_header->type);
tlv_len = GET_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 >= %zu",
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 %zu",
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]",
GET_ETHERADDR_STRING(tlv_ptr.lacp_tlv_actor_partner_info->sys),
GET_BE_U_2(tlv_ptr.lacp_tlv_actor_partner_info->sys_pri),
GET_BE_U_2(tlv_ptr.lacp_tlv_actor_partner_info->key),
GET_BE_U_2(tlv_ptr.lacp_tlv_actor_partner_info->port),
GET_BE_U_2(tlv_ptr.lacp_tlv_actor_partner_info->port_pri),
bittok2str(lacp_tlv_actor_partner_info_state_values,
"none",
GET_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 %zu",
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",
GET_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 %zu",
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",
GET_ETHERADDR_STRING(tlv_ptr.marker_tlv_marker_info->req_sys),
GET_BE_U_2(tlv_ptr.marker_tlv_marker_info->req_port),
GET_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");
}

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 = GET_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",
GET_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 = GET_U_1(ptr.slow_oam_tlv_header->type);
length = GET_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 >= %zu",
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 (GET_U_1(tlv.slow_oam_info->info_length) !=
sizeof(struct slow_oam_info_t)) {
ND_PRINT("\n\t ERROR: illegal length - should be %zu",
sizeof(struct slow_oam_info_t));
hexdump = TRUE;
goto badlength_code_info;
}

ND_PRINT("\n\t OAM-Version %u, Revision %u",
GET_U_1(tlv.slow_oam_info->oam_version),
GET_BE_U_2(tlv.slow_oam_info->revision));

state = GET_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",
GET_U_1(tlv.slow_oam_info->oam_config)),
GET_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",
GET_BE_U_3(tlv.slow_oam_info->oui)),
GET_BE_U_3(tlv.slow_oam_info->oui),
GET_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_PRINT("\n\t Sequence Number %u", GET_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;
type = GET_U_1(ptr.slow_oam_tlv_header->type);
length = GET_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 >= %zu",
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 (GET_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 %zu",
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",
GET_BE_U_2(tlv.slow_oam_link_event->time_stamp)*100,
GET_BE_U_8(tlv.slow_oam_link_event->window),
GET_BE_U_8(tlv.slow_oam_link_event->threshold),
GET_BE_U_8(tlv.slow_oam_link_event->errors),
GET_BE_U_8(tlv.slow_oam_link_event->errors_running_total),
GET_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;
command = GET_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");
}