* 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)
+ * Original code by Hannes Gredler (hannes@gredler.at)
*/
-#ifndef lint
-static const char rcsid[] _U_ =
- "@(#) $Header: /tcpdump/master/tcpdump/print-slow.c,v 1.4 2006-05-16 21:57:26 hannes Exp $";
-#endif
+/* \summary: IEEE "slow protocols" (802.3ad/802.3ah) printer */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <tcpdump-stdinc.h>
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
+#include <netdissect-stdinc.h>
-#include "interface.h"
+#include "netdissect.h"
#include "extract.h"
#include "addrtoname.h"
#include "ether.h"
#include "oui.h"
-struct slow_common_header_t {
- u_int8_t proto_subtype;
- u_int8_t version;
-};
-
#define SLOW_PROTO_LACP 1
#define SLOW_PROTO_MARKER 2
#define SLOW_PROTO_OAM 3
{ 0x0020, "Remote Evaluating" },
{ 0x0040, "Remote Stable" },
{ 0, NULL}
-};
+};
#define SLOW_OAM_CODE_INFO 0x00
#define SLOW_OAM_CODE_EVENT_NOTIF 0x01
};
struct slow_oam_info_t {
- u_int8_t info_type;
- u_int8_t info_len;
- u_int8_t oam_version;
- u_int8_t revision[2];
- u_int8_t state;
- u_int8_t oam_config;
- u_int8_t oam_pdu_config;
- u_int8_t oui[3];
- u_int8_t vendor_private[4];
+ 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
{ 0, NULL}
};
-#define SLOW_OAM_INFO_TYPE_LOCAL_REMOTE_MINLEN 16
-
#define OAM_INFO_TYPE_PARSER_MASK 0x3
static const struct tok slow_oam_info_type_state_parser_values[] = {
{ 0x00, "forwarding" },
/* 11 Bits */
#define OAM_INFO_TYPE_PDU_SIZE_MASK 0x7ff
-struct slow_oam_eventnotification_t {
- u_int8_t event_type;
- u_int8_t event_length;
- u_int8_t event_time_stamp[2];
- u_int8_t window[8];
- u_int8_t threshold[8];
- u_int8_t errors[8];
- u_int8_t errors_running_total[8];
- u_int8_t event_running_total[4];
+#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 {
- u_int8_t branch;
- u_int8_t leaf[2];
+ uint8_t branch;
+ uint8_t leaf[2];
};
struct slow_oam_variableresponse_t {
- u_int8_t branch;
- u_int8_t leaf[2];
- u_int8_t length;
+ 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[] = {
};
struct tlv_header_t {
- u_int8_t type;
- u_int8_t length;
+ uint8_t type;
+ uint8_t length;
};
-#define LACP_TLV_TERMINATOR 0x00
-#define LACP_TLV_ACTOR_INFO 0x01
-#define LACP_TLV_PARTNER_INFO 0x02
-#define LACP_TLV_COLLECTOR_INFO 0x03
+#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_TERMINATOR 0x00
-#define MARKER_TLV_MARKER_INFO 0x01
+#define MARKER_TLV_MARKER_INFO 0x01
static const struct tok slow_tlv_values[] = {
- { (SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR, "Terminator"},
+ { (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) + MARKER_TLV_TERMINATOR, "Terminator"},
+ { (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 {
- u_int8_t sys_pri[2];
- u_int8_t sys[ETHER_ADDR_LEN];
- u_int8_t key[2];
- u_int8_t port_pri[2];
- u_int8_t port[2];
- u_int8_t state;
- u_int8_t pad[3];
-};
+ 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"},
};
struct lacp_tlv_collector_info_t {
- u_int8_t max_delay[2];
- u_int8_t pad[12];
-};
+ uint8_t max_delay[2];
+ uint8_t pad[12];
+};
struct marker_tlv_marker_info_t {
- u_int8_t req_port[2];
- u_int8_t req_sys[ETHER_ADDR_LEN];
- u_int8_t req_trans_id[4];
- u_int8_t pad[2];
-};
+ 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 {
- u_int8_t pad[50];
-};
-
-void slow_marker_lacp_print(register const u_char *, register u_int);
-void slow_oam_print(register const u_char *, register u_int);
+ uint8_t pad[50];
+};
-const struct slow_common_header_t *slow_com_header;
+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(register const u_char *pptr, register u_int len) {
-
+slow_print(netdissect_options *ndo,
+ register const u_char *pptr, register u_int len)
+{
int print_version;
+ u_int subtype;
- slow_com_header = (const struct slow_common_header_t *)pptr;
- TCHECK(*slow_com_header);
+ if (len < 1)
+ goto tooshort;
+ ND_TCHECK(*pptr);
+ subtype = *pptr;
/*
* Sanity checking of the header.
*/
- switch (slow_com_header->proto_subtype) {
+ switch (subtype) {
case SLOW_PROTO_LACP:
- if (slow_com_header->version != LACP_VERSION) {
- printf("LACP version %u packet not supported",slow_com_header->version);
+ 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 (slow_com_header->version != MARKER_VERSION) {
- printf("MARKER version %u packet not supported",slow_com_header->version);
+ 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;
}
- if (print_version) {
- printf("%sv%u, length %u",
- tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
- slow_com_header->version,
- len);
+ 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 */
- printf("%s, length %u",
- tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
- len);
+ ND_PRINT((ndo, "%s, length %u",
+ tok2str(slow_proto_values, "unknown (%u)", subtype),
+ len));
}
/* unrecognized subtype */
if (print_version == -1) {
- print_unknown_data(pptr, "\n\t", len);
+ print_unknown_data(ndo, pptr, "\n\t", len);
return;
}
- if (!vflag)
+ if (!ndo->ndo_vflag)
return;
- switch (slow_com_header->proto_subtype) {
+ switch (subtype) {
default: /* should not happen */
break;
case SLOW_PROTO_OAM:
- /* skip proto_subtype */
- slow_oam_print(pptr+1, len-1);
+ /* 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 slow_common_header */
- len -= sizeof(const struct slow_common_header_t);
- pptr += sizeof(const struct slow_common_header_t);
- slow_marker_lacp_print(pptr, len);
+ /* 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:
- printf("\n\t\t packet exceeded snapshot");
+ if (!ndo->ndo_vflag)
+ ND_PRINT((ndo, " (packet exceeded snapshot)"));
+ else
+ ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
}
-void slow_marker_lacp_print(register const u_char *tptr, register u_int tlen) {
-
+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;
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 ? */
- TCHECK2(*tptr, sizeof(struct tlv_header_t));
+ ND_TCHECK2(*tptr, sizeof(struct tlv_header_t));
tlv_header = (const struct tlv_header_t *)tptr;
tlv_len = tlv_header->length;
- printf("\n\t%s TLV (0x%02x), length %u",
+ ND_PRINT((ndo, "\n\t%s TLV (0x%02x), length %u",
tok2str(slow_tlv_values,
"Unknown",
- (slow_com_header->proto_subtype << 8) + tlv_header->type),
+ (proto_subtype << 8) + tlv_header->type),
tlv_header->type,
- tlv_len);
-
- if ((tlv_len < sizeof(struct tlv_header_t) ||
- tlv_len > tlen) &&
- tlv_header->type != LACP_TLV_TERMINATOR &&
- tlv_header->type != MARKER_TLV_TERMINATOR) {
- printf("\n\t-----trailing data-----");
- print_unknown_data(tptr+sizeof(sizeof(struct tlv_header_t)),"\n\t ",tlen);
+ 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;
}
- tlv_tptr=tptr+sizeof(struct tlv_header_t);
- tlv_tlen=tlv_len-sizeof(struct tlv_header_t);
+ /* 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 ? */
- TCHECK2(*tptr, tlv_len);
+ ND_TCHECK2(*tptr, tlv_len);
+
+ tlv_tptr=tptr+sizeof(struct tlv_header_t);
+ tlv_tlen=tlv_len-sizeof(struct tlv_header_t);
- switch((slow_com_header->proto_subtype << 8) + tlv_header->type) {
+ 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;
- printf("\n\t System %s, System Priority %u, Key %u" \
+ ND_PRINT((ndo, "\n\t System %s, System Priority %u, Key %u" \
", Port %u, Port Priority %u\n\t State Flags [%s]",
- etheraddr_string(tlv_ptr.lacp_tlv_actor_partner_info->sys),
+ 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));
+ 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;
- printf("\n\t Max Delay %u",
- EXTRACT_16BITS(tlv_ptr.lacp_tlv_collector_info->max_delay));
+ 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;
- printf("\n\t Request System %s, Request Port %u, Request Transaction ID 0x%08x",
- etheraddr_string(tlv_ptr.marker_tlv_marker_info->req_sys),
+ 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;
-
- /* those two TLVs have the same structure -> fall through */
- case ((SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR):
- case ((SLOW_PROTO_MARKER << 8) + LACP_TLV_TERMINATOR):
- tlv_ptr.lacp_marker_tlv_terminator = (const struct lacp_marker_tlv_terminator_t *)tlv_tptr;
- if (tlv_len == 0) {
- tlv_len = sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad) +
- sizeof(struct tlv_header_t);
- /* tell the user that we modified the length field */
- if (vflag>1)
- printf(" (=%u)",tlv_len);
- /* we have messed around with the length field - now we need to check
- * again if there are enough bytes on the wire for the hexdump */
- TCHECK2(tlv_ptr.lacp_marker_tlv_terminator->pad[0],
- sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad));
- }
+ EXTRACT_32BITS(tlv_ptr.marker_tlv_marker_info->req_trans_id)));
break;
default:
- if (vflag <= 1)
- print_unknown_data(tlv_tptr,"\n\t ",tlv_tlen);
+ 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 (vflag > 1) {
- print_unknown_data(tptr+sizeof(sizeof(struct tlv_header_t)),"\n\t ",
+ if (ndo->ndo_vflag > 1) {
+ print_unknown_data(ndo, tptr+sizeof(struct tlv_header_t), "\n\t ",
tlv_len-sizeof(struct tlv_header_t));
}
tlen-=tlv_len;
}
return;
+
+tooshort:
+ ND_PRINT((ndo, "\n\t\t packet is too short"));
+ return;
+
trunc:
- printf("\n\t\t packet exceeded snapshot");
+ ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
}
-void slow_oam_print(register const u_char *tptr, register u_int tlen) {
+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 {
- u_int8_t flags[2];
- u_int8_t code;
+ uint8_t flags[2];
+ uint8_t code;
+ };
+
+ struct slow_oam_tlv_header_t {
+ uint8_t type;
+ uint8_t length;
};
- const struct slow_oam_common_header_t *slow_oam_common_header;
+
+ 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_eventnotification_t *slow_oam_eventnotification;
+ 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;
-
- slow_oam_common_header = (struct slow_oam_common_header_t *)tptr;
+
+ 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);
- printf("\n\tCode %s OAM PDU, Flags [%s]",
- tok2str(slow_oam_code_values, "Unknown (%u)", slow_oam_common_header->code),
+ 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(&slow_oam_common_header->flags)));
+ EXTRACT_16BITS(&ptr.slow_oam_common_header->flags))));
- switch (slow_oam_common_header->code) {
+ switch (ptr.slow_oam_common_header->code) {
case SLOW_OAM_CODE_INFO:
while (tlen > 0) {
- tlv.slow_oam_info = (const struct slow_oam_info_t *)tptr;
- printf("\n\t %s Information Type (%u), Version %u, Rev %u, length %u",
- tok2str(slow_oam_info_type_values, "Reserved", tlv.slow_oam_info->info_type),
- tlv.slow_oam_info->info_type,
- tlv.slow_oam_info->oam_version,
- EXTRACT_16BITS(&tlv.slow_oam_info->revision),
- tlv.slow_oam_info->info_len);
-
- switch (tlv.slow_oam_info->info_type) {
- case SLOW_OAM_INFO_TYPE_END_OF_TLV:
-
- if (tlv.slow_oam_info->info_len != 0) {
- printf("\n\t ERROR: illegal length - should be 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:
-
- if (tlv.slow_oam_info->info_len !=
- SLOW_OAM_INFO_TYPE_LOCAL_REMOTE_MINLEN) {
- printf("\n\t ERROR: illegal length - should be %u",
- SLOW_OAM_INFO_TYPE_LOCAL_REMOTE_MINLEN);
- return;
+ 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;
}
-
- printf("\n\t State-MUX-Action %s, State-Parser-Action %s",
+
+ 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));
- printf("\n\t OAM-Config Flags [%s], OAM-PDU-Config max-PDU size %u",
+ 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);
- printf("\n\t OUI %s (0x%06x), Vendor-Private 0x%08x",
+ 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));
+ EXTRACT_32BITS(&tlv.slow_oam_info->vendor_private)));
break;
-
+
case SLOW_OAM_INFO_TYPE_ORG_SPECIFIC:
- /* FIXME hexdump */
+ hexdump = TRUE;
break;
-
+
default:
+ hexdump = TRUE;
break;
}
- /* infinite loop check */
- if (!tlv.slow_oam_info->info_len) {
- return;
+ 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 -= tlv.slow_oam_info->info_len;
- tptr += tlv.slow_oam_info->info_len;
+
+ tlen -= ptr.slow_oam_tlv_header->length;
+ tptr += ptr.slow_oam_tlv_header->length;
}
break;
- /* FIXME no codes yet known - just hexdump for now */
+
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_LOOPBACK_CTRL:
case SLOW_OAM_CODE_PRIVATE:
default:
- if (vflag <= 1) {
- print_unknown_data(tptr,"\n\t ", tlen);
+ if (ndo->ndo_vflag <= 1) {
+ print_unknown_data(ndo, tptr, "\n\t ", tlen);
}
break;
}
- /* do we want to see an additional hexdump ? */
- if (vflag > 1) {
- print_unknown_data(tptr,"\n\t ", tlen);
- }
+ return;
+tooshort:
+ ND_PRINT((ndo, "\n\t\t packet is too short"));
return;
+
+trunc:
+ ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
}
projects / tcpdump / blobdiff