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tcpdump/print-slow.c
Guy Harris c6415c9854 Fix bugs, add checks. 
Add multiple bounds and length checks to make sure we don't run past the
end of the packet.

Don't check the length of "end of TLV" indicators; 802.3 says it should
be ignored.

The Event Notification OAMPDU has a sequence number; report it.
2017-01-18 09:16:40 +01:00

745 lines
25 KiB
C
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/*
* 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@juniper.net)
*/
/* \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 "ether.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 {
uint8_t info_type;
uint8_t info_length;
uint8_t oam_version;
uint8_t revision[2];
uint8_t state;
uint8_t oam_config;
uint8_t oam_pdu_config[2];
uint8_t oui[3];
uint8_t vendor_private[4];
};
#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 {
uint8_t event_type;
uint8_t event_length;
uint8_t time_stamp[2];
uint8_t window[8];
uint8_t threshold[8];
uint8_t errors[8];
uint8_t errors_running_total[8];
uint8_t event_running_total[4];
};
struct slow_oam_variablerequest_t {
uint8_t branch;
uint8_t leaf[2];
};
struct slow_oam_variableresponse_t {
uint8_t branch;
uint8_t leaf[2];
uint8_t length;
};
struct slow_oam_loopbackctrl_t {
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 {
uint8_t type;
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 {
uint8_t sys_pri[2];
uint8_t sys[ETHER_ADDR_LEN];
uint8_t key[2];
uint8_t port_pri[2];
uint8_t port[2];
uint8_t state;
uint8_t 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 {
uint8_t max_delay[2];
uint8_t pad[12];
};
struct marker_tlv_marker_info_t {
uint8_t req_port[2];
uint8_t req_sys[ETHER_ADDR_LEN];
uint8_t req_trans_id[4];
uint8_t pad[2];
};
struct lacp_marker_tlv_terminator_t {
uint8_t pad[50];
};
static void slow_marker_lacp_print(netdissect_options *, register const u_char *, register u_int, u_int);
static void slow_oam_print(netdissect_options *, register const u_char *, register u_int);
void
slow_print(netdissect_options *ndo,
register const u_char *pptr, register u_int len)
{
int print_version;
u_int subtype;
if (len < 1)
goto tooshort;
ND_TCHECK(*pptr);
subtype = *pptr;
/*
* Sanity checking of the header.
*/
switch (subtype) {
case SLOW_PROTO_LACP:
if (len < 2)
goto tooshort;
ND_TCHECK(*(pptr+1));
if (*(pptr+1) != LACP_VERSION) {
ND_PRINT((ndo, "LACP version %u packet not supported", *(pptr+1)));
return;
}
print_version = 1;
break;
case SLOW_PROTO_MARKER:
if (len < 2)
goto tooshort;
ND_TCHECK(*(pptr+1));
if (*(pptr+1) != MARKER_VERSION) {
ND_PRINT((ndo, "MARKER version %u packet not supported", *(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((ndo, "%sv%u, length %u",
tok2str(slow_proto_values, "unknown (%u)", subtype),
*(pptr+1),
len));
} else {
/* some slow protos don't have a version number in the header */
ND_PRINT((ndo, "%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((ndo, " (packet is too short)"));
else
ND_PRINT((ndo, "\n\t\t packet is too short"));
return;
trunc:
if (!ndo->ndo_vflag)
ND_PRINT((ndo, " (packet exceeded snapshot)"));
else
ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
}
static void
slow_marker_lacp_print(netdissect_options *ndo,
register const u_char *tptr, register u_int tlen,
u_int proto_subtype)
{
const struct tlv_header_t *tlv_header;
const u_char *tlv_tptr;
u_int 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_TCHECK2(*tptr, sizeof(struct tlv_header_t));
tlv_header = (const struct tlv_header_t *)tptr;
tlv_len = tlv_header->length;
ND_PRINT((ndo, "\n\t%s TLV (0x%02x), length %u",
tok2str(slow_tlv_values,
"Unknown",
(proto_subtype << 8) + tlv_header->type),
tlv_header->type,
tlv_len));
if (tlv_header->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((ndo, "\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_TCHECK2(*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_header->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((ndo, "\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((ndo, "\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_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->sys_pri),
EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->key),
EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port),
EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port_pri),
bittok2str(lacp_tlv_actor_partner_info_state_values,
"none",
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((ndo, "\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((ndo, "\n\t Max Delay %u",
EXTRACT_16BITS(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((ndo, "\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((ndo, "\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_16BITS(tlv_ptr.marker_tlv_marker_info->req_port),
EXTRACT_32BITS(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((ndo, "\n\t\t packet is too short"));
return;
trunc:
ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
}
static void
slow_oam_print(netdissect_options *ndo,
register const u_char *tptr, register u_int tlen)
{
u_int hexdump;
struct slow_oam_common_header_t {
uint8_t flags[2];
uint8_t code;
};
struct slow_oam_tlv_header_t {
uint8_t type;
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(*ptr.slow_oam_common_header);
tptr += sizeof(struct slow_oam_common_header_t);
tlen -= sizeof(struct slow_oam_common_header_t);
ND_PRINT((ndo, "\n\tCode %s OAM PDU, Flags [%s]",
tok2str(slow_oam_code_values, "Unknown (%u)", ptr.slow_oam_common_header->code),
bittok2str(slow_oam_flag_values,
"none",
EXTRACT_16BITS(&ptr.slow_oam_common_header->flags))));
switch (ptr.slow_oam_common_header->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(*ptr.slow_oam_tlv_header);
ND_PRINT((ndo, "\n\t %s Information Type (%u), length %u",
tok2str(slow_oam_info_type_values, "Reserved",
ptr.slow_oam_tlv_header->type),
ptr.slow_oam_tlv_header->type,
ptr.slow_oam_tlv_header->length));
if (ptr.slow_oam_tlv_header->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 (ptr.slow_oam_tlv_header->length < sizeof(struct slow_oam_tlv_header_t)) {
ND_PRINT((ndo, "\n\t ERROR: illegal length - should be >= %u",
(u_int)sizeof(struct slow_oam_tlv_header_t)));
return;
}
if (tlen < ptr.slow_oam_tlv_header->length)
goto tooshort;
ND_TCHECK2(*tptr, ptr.slow_oam_tlv_header->length);
hexdump = FALSE;
switch (ptr.slow_oam_tlv_header->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 (tlv.slow_oam_info->info_length !=
sizeof(struct slow_oam_info_t)) {
ND_PRINT((ndo, "\n\t ERROR: illegal length - should be %lu",
(unsigned long) sizeof(struct slow_oam_info_t)));
hexdump = TRUE;
goto badlength_code_info;
}
ND_PRINT((ndo, "\n\t OAM-Version %u, Revision %u",
tlv.slow_oam_info->oam_version,
EXTRACT_16BITS(&tlv.slow_oam_info->revision)));
ND_PRINT((ndo, "\n\t State-Parser-Action %s, State-MUX-Action %s",
tok2str(slow_oam_info_type_state_parser_values, "Reserved",
tlv.slow_oam_info->state & OAM_INFO_TYPE_PARSER_MASK),
tok2str(slow_oam_info_type_state_mux_values, "Reserved",
tlv.slow_oam_info->state & OAM_INFO_TYPE_MUX_MASK)));
ND_PRINT((ndo, "\n\t OAM-Config Flags [%s], OAM-PDU-Config max-PDU size %u",
bittok2str(slow_oam_info_type_oam_config_values, "none",
tlv.slow_oam_info->oam_config),
EXTRACT_16BITS(&tlv.slow_oam_info->oam_pdu_config) &
OAM_INFO_TYPE_PDU_SIZE_MASK));
ND_PRINT((ndo, "\n\t OUI %s (0x%06x), Vendor-Private 0x%08x",
tok2str(oui_values, "Unknown",
EXTRACT_24BITS(&tlv.slow_oam_info->oui)),
EXTRACT_24BITS(&tlv.slow_oam_info->oui),
EXTRACT_32BITS(&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 ",
ptr.slow_oam_tlv_header->length);
}
tlen -= ptr.slow_oam_tlv_header->length;
tptr += ptr.slow_oam_tlv_header->length;
}
break;
case SLOW_OAM_CODE_EVENT_NOTIF:
/* Sequence number */
if (tlen < 2)
goto tooshort;
ND_TCHECK2(*tptr, 2);
ND_PRINT((ndo, "\n\t Sequence Number %u", EXTRACT_16BITS(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(*ptr.slow_oam_tlv_header);
ND_PRINT((ndo, "\n\t %s Link Event Type (%u), length %u",
tok2str(slow_oam_link_event_values, "Reserved",
ptr.slow_oam_tlv_header->type),
ptr.slow_oam_tlv_header->type,
ptr.slow_oam_tlv_header->length));
if (ptr.slow_oam_tlv_header->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 (ptr.slow_oam_tlv_header->length < sizeof(struct slow_oam_tlv_header_t)) {
ND_PRINT((ndo, "\n\t ERROR: illegal length - should be >= %u",
(u_int)sizeof(struct slow_oam_tlv_header_t)));
return;
}
if (tlen < ptr.slow_oam_tlv_header->length)
goto tooshort;
ND_TCHECK2(*tptr, ptr.slow_oam_tlv_header->length);
hexdump = FALSE;
switch (ptr.slow_oam_tlv_header->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 (tlv.slow_oam_link_event->event_length !=
sizeof(struct slow_oam_link_event_t)) {
ND_PRINT((ndo, "\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((ndo, "\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_16BITS(&tlv.slow_oam_link_event->time_stamp)*100,
EXTRACT_64BITS(&tlv.slow_oam_link_event->window),
EXTRACT_64BITS(&tlv.slow_oam_link_event->threshold),
EXTRACT_64BITS(&tlv.slow_oam_link_event->errors),
EXTRACT_64BITS(&tlv.slow_oam_link_event->errors_running_total),
EXTRACT_32BITS(&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 ",
ptr.slow_oam_tlv_header->length);
}
tlen -= ptr.slow_oam_tlv_header->length;
tptr += ptr.slow_oam_tlv_header->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(*tlv.slow_oam_loopbackctrl);
ND_PRINT((ndo, "\n\t Command %s (%u)",
tok2str(slow_oam_loopbackctrl_cmd_values,
"Unknown",
tlv.slow_oam_loopbackctrl->command),
tlv.slow_oam_loopbackctrl->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((ndo, "\n\t\t packet is too short"));
return;
trunc:
ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
}
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