265 lines
9.0 KiB
C
265 lines
9.0 KiB
C
/*
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* Copyright (c) 1998-2005 The TCPDUMP project
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code
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* distributions retain the above copyright notice and this paragraph
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* in its entirety, and (2) distributions including binary code include
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* the above copyright notice and this paragraph in its entirety in
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* the documentation or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND
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* WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
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* LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE.
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*
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* support for the IEEE "slow protocols" LACP, MARKER as per 802.3ad
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*
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* Original code by Hannes Gredler (hannes@juniper.net)
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*/
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#ifndef lint
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static const char rcsid[] _U_ =
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"@(#) $Header: /tcpdump/master/tcpdump/print-slow.c,v 1.1.2.1 2005/07/10 14:47:56 hannes Exp $";
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#endif
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "interface.h"
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#include "extract.h"
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#include "addrtoname.h"
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#include "ether.h"
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struct slow_common_header {
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u_int8_t proto_subtype;
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u_int8_t version;
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};
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#define SLOW_PROTO_LACP 1
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#define SLOW_PROTO_MARKER 2
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#define LACP_VERSION 1
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#define MARKER_VERSION 1
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static const struct tok slow_proto_values[] = {
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{ SLOW_PROTO_LACP, "LACP" },
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{ SLOW_PROTO_MARKER, "MARKER" },
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{ 0, NULL}
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};
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struct tlv_header_t {
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u_int8_t type;
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u_int8_t length;
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};
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#define LACP_TLV_TERMINATOR 0x00
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#define LACP_TLV_ACTOR_INFO 0x01
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#define LACP_TLV_PARTNER_INFO 0x02
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#define LACP_TLV_COLLECTOR_INFO 0x03
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#define MARKER_TLV_TERMINATOR 0x00
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#define MARKER_TLV_MARKER_INFO 0x01
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static const struct tok slow_tlv_values[] = {
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{ (SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR, "Terminator"},
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{ (SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO, "Actor Information"},
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{ (SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO, "Partner Information"},
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{ (SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO, "Collector Information"},
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{ (SLOW_PROTO_MARKER << 8) + MARKER_TLV_TERMINATOR, "Terminator"},
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{ (SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO, "Marker Information"},
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{ 0, NULL}
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};
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struct lacp_tlv_actor_partner_info_t {
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u_int8_t sys_pri[2];
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u_int8_t sys[ETHER_ADDR_LEN];
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u_int8_t key[2];
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u_int8_t port_pri[2];
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u_int8_t port[2];
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u_int8_t state;
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u_int8_t pad[3];
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};
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static const struct tok lacp_tlv_actor_partner_info_state_values[] = {
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{ 0x01, "Activity"},
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{ 0x02, "Timeout"},
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{ 0x04, "Aggregation"},
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{ 0x08, "Synchronization"},
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{ 0x10, "Collecting"},
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{ 0x20, "Distributing"},
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{ 0x40, "Default"},
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{ 0x80, "Expired"},
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{ 0, NULL}
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};
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struct lacp_tlv_collector_info_t {
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u_int8_t max_delay[2];
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u_int8_t pad[12];
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};
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struct marker_tlv_marker_info_t {
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u_int8_t req_port[2];
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u_int8_t req_sys[ETHER_ADDR_LEN];
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u_int8_t req_trans_id[4];
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u_int8_t pad[2];
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};
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struct lacp_marker_tlv_terminator_t {
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u_int8_t pad[50];
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};
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void
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slow_print(register const u_char *pptr, register u_int len) {
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const struct slow_common_header *slow_com_header;
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const struct tlv_header_t *tlv_header;
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const u_char *tptr,*tlv_tptr;
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u_int tlv_len,tlen,tlv_tlen;
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union {
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const struct lacp_marker_tlv_terminator_t *lacp_marker_tlv_terminator;
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const struct lacp_tlv_actor_partner_info_t *lacp_tlv_actor_partner_info;
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const struct lacp_tlv_collector_info_t *lacp_tlv_collector_info;
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const struct marker_tlv_marker_info_t *marker_tlv_marker_info;
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} tlv_ptr;
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tptr=pptr;
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slow_com_header = (const struct slow_common_header *)pptr;
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TCHECK(*slow_com_header);
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/*
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* Sanity checking of the header.
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*/
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if (slow_com_header->proto_subtype == SLOW_PROTO_LACP &&
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slow_com_header->version != LACP_VERSION) {
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printf("LACP version %u packet not supported",slow_com_header->version);
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return;
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}
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if (slow_com_header->proto_subtype == SLOW_PROTO_MARKER &&
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slow_com_header->version != MARKER_VERSION) {
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printf("MARKER version %u packet not supported",slow_com_header->version);
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return;
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}
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printf("%sv%u, length: %u",
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tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
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slow_com_header->version,
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len);
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if (!vflag)
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return;
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/* ok they seem to want to know everything - lets fully decode it */
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tlen=len-sizeof(struct slow_common_header);
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tptr+=sizeof(const struct slow_common_header);
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while(tlen>0) {
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/* did we capture enough for fully decoding the tlv header ? */
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TCHECK2(*tptr, sizeof(struct tlv_header_t));
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tlv_header = (const struct tlv_header_t *)tptr;
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tlv_len = tlv_header->length;
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printf("\n\t%s TLV (0x%02x), length: %u",
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tok2str(slow_tlv_values,
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"Unknown",
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(slow_com_header->proto_subtype << 8) + tlv_header->type),
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tlv_header->type,
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tlv_len);
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if ((tlv_len < sizeof(struct tlv_header_t) ||
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tlv_len > tlen) &&
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tlv_header->type != LACP_TLV_TERMINATOR &&
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tlv_header->type != MARKER_TLV_TERMINATOR) {
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printf("\n\t-----trailing data-----");
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print_unknown_data(tptr+sizeof(sizeof(struct tlv_header_t)),"\n\t ",tlen);
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return;
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}
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tlv_tptr=tptr+sizeof(struct tlv_header_t);
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tlv_tlen=tlv_len-sizeof(struct tlv_header_t);
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/* did we capture enough for fully decoding the tlv ? */
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TCHECK2(*tptr, tlv_len);
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switch((slow_com_header->proto_subtype << 8) + tlv_header->type) {
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/* those two TLVs have the same structure -> fall through */
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case ((SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO):
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case ((SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO):
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tlv_ptr.lacp_tlv_actor_partner_info = (const struct lacp_tlv_actor_partner_info_t *)tlv_tptr;
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printf("\n\t System %s, System Priority %u, Key %u" \
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", Port %u, Port Priority %u\n\t State Flags [%s]",
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etheraddr_string(tlv_ptr.lacp_tlv_actor_partner_info->sys),
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EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->sys_pri),
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EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->key),
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EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port),
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EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port_pri),
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bittok2str(lacp_tlv_actor_partner_info_state_values,
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"none",
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tlv_ptr.lacp_tlv_actor_partner_info->state));
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break;
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case ((SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO):
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tlv_ptr.lacp_tlv_collector_info = (const struct lacp_tlv_collector_info_t *)tlv_tptr;
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printf("\n\t Max Delay %u",
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EXTRACT_16BITS(tlv_ptr.lacp_tlv_collector_info->max_delay));
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break;
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case ((SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO):
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tlv_ptr.marker_tlv_marker_info = (const struct marker_tlv_marker_info_t *)tlv_tptr;
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printf("\n\t Request System %s, Request Port %u, Request Transaction ID 0x%08x",
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etheraddr_string(tlv_ptr.marker_tlv_marker_info->req_sys),
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EXTRACT_16BITS(tlv_ptr.marker_tlv_marker_info->req_port),
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EXTRACT_32BITS(tlv_ptr.marker_tlv_marker_info->req_trans_id));
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break;
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/* those two TLVs have the same structure -> fall through */
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case ((SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR):
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case ((SLOW_PROTO_MARKER << 8) + LACP_TLV_TERMINATOR):
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tlv_ptr.lacp_marker_tlv_terminator = (const struct lacp_marker_tlv_terminator_t *)tlv_tptr;
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if (tlv_len == 0) {
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tlv_len = sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad) +
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sizeof(struct tlv_header_t);
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/* tell the user that we modified the length field */
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if (vflag>1)
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printf(" (=%u)",tlv_len);
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/* we have messed around with the length field - now we need to check
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* again if there are enough bytes on the wire for the hexdump */
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TCHECK2(tlv_ptr.lacp_marker_tlv_terminator->pad[0],
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sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad));
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}
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break;
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default:
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if (vflag <= 1)
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print_unknown_data(tlv_tptr,"\n\t ",tlv_tlen);
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break;
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}
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/* do we want to see an additionally hexdump ? */
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if (vflag > 1)
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print_unknown_data(tptr+sizeof(sizeof(struct tlv_header_t)),"\n\t ",
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tlv_len-sizeof(struct tlv_header_t));
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tptr+=tlv_len;
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tlen-=tlv_len;
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}
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return;
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trunc:
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printf("\n\t\t packet exceeded snapshot");
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}
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