contrib/tcpdump-3.9/print-slow.c

   1 /*
   2  * Copyright (c) 1998-2005 The TCPDUMP project
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that: (1) source code
   6  * distributions retain the above copyright notice and this paragraph
   7  * in its entirety, and (2) distributions including binary code include
   8  * the above copyright notice and this paragraph in its entirety in
   9  * the documentation or other materials provided with the distribution.
  10  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
  11  * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
  12  * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  13  * FOR A PARTICULAR PURPOSE.
  14  *
  15  * support for the IEEE "slow protocols" LACP, MARKER as per 802.3ad
  16  *
  17  * Original code by Hannes Gredler (hannes@juniper.net)
  18  */
  19
  20 #ifndef lint
  21 static const char rcsid[] _U_ =
  22     "@(#) $Header: /tcpdump/master/tcpdump/print-slow.c,v 1.1.2.1 2005/07/10 14:47:56 hannes Exp $";
  23 #endif
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include "config.h"
  27 #endif
  28
  29 #include <tcpdump-stdinc.h>
  30
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <string.h>
  34
  35 #include "interface.h"
  36 #include "extract.h"
  37 #include "addrtoname.h"
  38 #include "ether.h"
  39
  40 struct slow_common_header {
  41     u_int8_t proto_subtype;
  42     u_int8_t version;
  43 };
  44
  45 #define SLOW_PROTO_LACP                     1
  46 #define SLOW_PROTO_MARKER                   2
  47
  48 #define LACP_VERSION                        1
  49 #define MARKER_VERSION                      1
  50
  51 static const struct tok slow_proto_values[] = {
  52     { SLOW_PROTO_LACP, "LACP" },
  53     { SLOW_PROTO_MARKER, "MARKER" },
  54     { 0, NULL}
  55 };
  56
  57 struct tlv_header_t {
  58     u_int8_t type;
  59     u_int8_t length;
  60 };
  61
  62 #define LACP_TLV_TERMINATOR     0x00
  63 #define LACP_TLV_ACTOR_INFO     0x01
  64 #define LACP_TLV_PARTNER_INFO   0x02
  65 #define LACP_TLV_COLLECTOR_INFO 0x03
  66
  67 #define MARKER_TLV_TERMINATOR   0x00
  68 #define MARKER_TLV_MARKER_INFO  0x01
  69
  70 static const struct tok slow_tlv_values[] = {
  71     { (SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR, "Terminator"},
  72     { (SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO, "Actor Information"},
  73     { (SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO, "Partner Information"},
  74     { (SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO, "Collector Information"},
  75
  76     { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_TERMINATOR, "Terminator"},
  77     { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO, "Marker Information"},
  78     { 0, NULL}
  79 };
  80
  81 struct lacp_tlv_actor_partner_info_t {
  82     u_int8_t sys_pri[2];
  83     u_int8_t sys[ETHER_ADDR_LEN];
  84     u_int8_t key[2];
  85     u_int8_t port_pri[2];
  86     u_int8_t port[2];
  87     u_int8_t state;
  88     u_int8_t pad[3];
  89 };
  90
  91 static const struct tok lacp_tlv_actor_partner_info_state_values[] = {
  92     { 0x01, "Activity"},
  93     { 0x02, "Timeout"},
  94     { 0x04, "Aggregation"},
  95     { 0x08, "Synchronization"},
  96     { 0x10, "Collecting"},
  97     { 0x20, "Distributing"},
  98     { 0x40, "Default"},
  99     { 0x80, "Expired"},
 100     { 0, NULL}
 101 };
 102
 103 struct lacp_tlv_collector_info_t {
 104     u_int8_t max_delay[2];
 105     u_int8_t pad[12];
 106 };
 107
 108 struct marker_tlv_marker_info_t {
 109     u_int8_t req_port[2];
 110     u_int8_t req_sys[ETHER_ADDR_LEN];
 111     u_int8_t req_trans_id[4];
 112     u_int8_t pad[2];
 113 };
 114
 115 struct lacp_marker_tlv_terminator_t {
 116     u_int8_t pad[50];
 117 };
 118
 119 void
 120 slow_print(register const u_char *pptr, register u_int len) {
 121
 122     const struct slow_common_header *slow_com_header;
 123     const struct tlv_header_t *tlv_header;
 124     const u_char *tptr,*tlv_tptr;
 125     u_int tlv_len,tlen,tlv_tlen;
 126
 127     union {
 128         const struct lacp_marker_tlv_terminator_t *lacp_marker_tlv_terminator;
 129         const struct lacp_tlv_actor_partner_info_t *lacp_tlv_actor_partner_info;
 130         const struct lacp_tlv_collector_info_t *lacp_tlv_collector_info;
 131         const struct marker_tlv_marker_info_t *marker_tlv_marker_info;
 132     } tlv_ptr;
 133
 134     tptr=pptr;
 135     slow_com_header = (const struct slow_common_header *)pptr;
 136     TCHECK(*slow_com_header);
 137
 138     /*
 139      * Sanity checking of the header.
 140      */
 141     if (slow_com_header->proto_subtype == SLOW_PROTO_LACP &&
 142         slow_com_header->version != LACP_VERSION) {
 143         printf("LACP version %u packet not supported",slow_com_header->version);
 144         return;
 145     }
 146     if (slow_com_header->proto_subtype == SLOW_PROTO_MARKER &&
 147         slow_com_header->version != MARKER_VERSION) {
 148         printf("MARKER version %u packet not supported",slow_com_header->version);
 149         return;
 150     }
 151
 152     printf("%sv%u, length: %u",
 153            tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
 154            slow_com_header->version,
 155            len);
 156
 157     if (!vflag)
 158         return;
 159
 160     /* ok they seem to want to know everything - lets fully decode it */
 161     tlen=len-sizeof(struct slow_common_header);
 162     tptr+=sizeof(const struct slow_common_header);
 163
 164     while(tlen>0) {
 165         /* did we capture enough for fully decoding the tlv header ? */
 166         TCHECK2(*tptr, sizeof(struct tlv_header_t));
 167         tlv_header = (const struct tlv_header_t *)tptr;
 168         tlv_len = tlv_header->length;
 169
 170         printf("\n\t%s TLV (0x%02x), length: %u",
 171                tok2str(slow_tlv_values,
 172                        "Unknown",
 173                        (slow_com_header->proto_subtype << 8) + tlv_header->type),
 174                tlv_header->type,
 175                tlv_len);
 176
 177         if ((tlv_len < sizeof(struct tlv_header_t) ||
 178             tlv_len > tlen) &&
 179             tlv_header->type != LACP_TLV_TERMINATOR &&
 180             tlv_header->type != MARKER_TLV_TERMINATOR) {
 181             printf("\n\t-----trailing data-----");
 182             print_unknown_data(tptr+sizeof(sizeof(struct tlv_header_t)),"\n\t  ",tlen);
 183             return;
 184         }
 185
 186         tlv_tptr=tptr+sizeof(struct tlv_header_t);
 187         tlv_tlen=tlv_len-sizeof(struct tlv_header_t);
 188
 189         /* did we capture enough for fully decoding the tlv ? */
 190         TCHECK2(*tptr, tlv_len);
 191
 192         switch((slow_com_header->proto_subtype << 8) + tlv_header->type) {
 193
 194             /* those two TLVs have the same structure -> fall through */
 195         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO):
 196         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO):
 197             tlv_ptr.lacp_tlv_actor_partner_info = (const struct lacp_tlv_actor_partner_info_t *)tlv_tptr;
 198
 199             printf("\n\t  System %s, System Priority %u, Key %u" \
 200                    ", Port %u, Port Priority %u\n\t  State Flags [%s]",
 201                    etheraddr_string(tlv_ptr.lacp_tlv_actor_partner_info->sys),
 202                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->sys_pri),
 203                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->key),
 204                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port),
 205                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port_pri),
 206                    bittok2str(lacp_tlv_actor_partner_info_state_values,
 207                               "none",
 208                               tlv_ptr.lacp_tlv_actor_partner_info->state));
 209
 210             break;
 211
 212         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO):
 213             tlv_ptr.lacp_tlv_collector_info = (const struct lacp_tlv_collector_info_t *)tlv_tptr;
 214
 215             printf("\n\t  Max Delay %u",
 216                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_collector_info->max_delay));
 217
 218             break;
 219
 220         case ((SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO):
 221             tlv_ptr.marker_tlv_marker_info = (const struct marker_tlv_marker_info_t *)tlv_tptr;
 222
 223             printf("\n\t  Request System %s, Request Port %u, Request Transaction ID 0x%08x",
 224                    etheraddr_string(tlv_ptr.marker_tlv_marker_info->req_sys),
 225                    EXTRACT_16BITS(tlv_ptr.marker_tlv_marker_info->req_port),
 226                    EXTRACT_32BITS(tlv_ptr.marker_tlv_marker_info->req_trans_id));
 227
 228             break;
 229
 230             /* those two TLVs have the same structure -> fall through */
 231         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR):
 232         case ((SLOW_PROTO_MARKER << 8) + LACP_TLV_TERMINATOR):
 233             tlv_ptr.lacp_marker_tlv_terminator = (const struct lacp_marker_tlv_terminator_t *)tlv_tptr;
 234             if (tlv_len == 0) {
 235                 tlv_len = sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad) +
 236                     sizeof(struct tlv_header_t);
 237                 /* tell the user that we modified the length field  */
 238                 if (vflag>1)
 239                     printf(" (=%u)",tlv_len);
 240                 /* we have messed around with the length field - now we need to check
 241                  * again if there are enough bytes on the wire for the hexdump */
 242                 TCHECK2(tlv_ptr.lacp_marker_tlv_terminator->pad[0],
 243                         sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad));
 244             }
 245
 246             break;
 247
 248         default:
 249             if (vflag <= 1)
 250                 print_unknown_data(tlv_tptr,"\n\t  ",tlv_tlen);
 251             break;
 252         }
 253         /* do we want to see an additionally hexdump ? */
 254         if (vflag > 1)
 255             print_unknown_data(tptr+sizeof(sizeof(struct tlv_header_t)),"\n\t  ",
 256                                tlv_len-sizeof(struct tlv_header_t));
 257
 258         tptr+=tlv_len;
 259         tlen-=tlv_len;
 260     }
 261     return;
 262 trunc:
 263     printf("\n\t\t packet exceeded snapshot");
 264 }