external/bsd/tcpdump/dist/print-lwapp.c

   1 /*
   2  * Copyright (c) 1998-2007 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 Light Weight Access Point Protocol as per RFC 5412
  16  *
  17  * Original code by Carles Kishimoto <carles.kishimoto@gmail.com>
  18  */
  19
  20 #include <sys/cdefs.h>
  21 #ifndef lint
  22 __RCSID("$NetBSD: print-lwapp.c,v 1.5 2015/03/31 21:59:35 christos Exp $");
  23 #endif
  24
  25 #define NETDISSECT_REWORKED
  26 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29
  30 #include <tcpdump-stdinc.h>
  31
  32 #include "interface.h"
  33 #include "extract.h"
  34 #include "addrtoname.h"
  35
  36 /*
  37  * LWAPP transport (common) header
  38  *      0                   1                   2                   3
  39  *     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
  40  *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  41  *    |VER| RID |C|F|L|    Frag ID    |            Length             |
  42  *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  43  *    |          Status/WLANs         |   Payload...  |
  44  *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  45  *
  46  */
  47
  48 struct lwapp_transport_header {
  49     uint8_t  version;
  50     uint8_t  frag_id;
  51     uint8_t  length[2];
  52     uint16_t status;
  53 };
  54
  55 /*
  56  * LWAPP control header
  57  *      0                   1                   2                   3
  58  *      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
  59  *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  60  *     |  Message Type |    Seq Num    |      Msg Element Length       |
  61  *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  62  *     |                           Session ID                          |
  63  *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  64  *     |      Msg Element [0..N]       |
  65  *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  66  */
  67
  68 struct lwapp_control_header {
  69     uint8_t  msg_type;
  70     uint8_t  seq_num;
  71     uint8_t  len[2];
  72     uint8_t  session_id[4];
  73 };
  74
  75 #define LWAPP_VERSION 0
  76 #define LWAPP_EXTRACT_VERSION(x) (((x)&0xC0)>>6)
  77 #define LWAPP_EXTRACT_RID(x) (((x)&0x38)>>3)
  78 #define LWAPP_EXTRACT_CONTROL_BIT(x) (((x)&0x04)>>2)
  79
  80 static const struct tok lwapp_header_bits_values[] = {
  81     { 0x01, "Last Fragment Bit"},
  82     { 0x02, "Fragment Bit"},
  83     { 0x04, "Control Bit"},
  84     { 0, NULL}
  85 };
  86
  87 #define LWAPP_MSGTYPE_DISCOVERY_REQUEST                 1
  88 #define LWAPP_MSGTYPE_DISCOVERY_RESPONSE                2
  89 #define LWAPP_MSGTYPE_JOIN_REQUEST                      3
  90 #define LWAPP_MSGTYPE_JOIN_RESPONSE                     4
  91 #define LWAPP_MSGTYPE_JOIN_ACK                          5
  92 #define LWAPP_MSGTYPE_JOIN_CONFIRM                      6
  93 #define LWAPP_MSGTYPE_CONFIGURE_REQUEST                 10
  94 #define LWAPP_MSGTYPE_CONFIGURE_RESPONSE                11
  95 #define LWAPP_MSGTYPE_CONF_UPDATE_REQUEST               12
  96 #define LWAPP_MSGTYPE_CONF_UPDATE_RESPONSE              13
  97 #define LWAPP_MSGTYPE_WTP_EVENT_REQUEST                 14
  98 #define LWAPP_MSGTYPE_WTP_EVENT_RESPONSE                15
  99 #define LWAPP_MSGTYPE_CHANGE_STATE_EVENT_REQUEST        16
 100 #define LWAPP_MSGTYPE_CHANGE_STATE_EVENT_RESPONSE       17
 101 #define LWAPP_MSGTYPE_ECHO_REQUEST                      22
 102 #define LWAPP_MSGTYPE_ECHO_RESPONSE                     23
 103 #define LWAPP_MSGTYPE_IMAGE_DATA_REQUEST                24
 104 #define LWAPP_MSGTYPE_IMAGE_DATA_RESPONSE               25
 105 #define LWAPP_MSGTYPE_RESET_REQUEST                     26
 106 #define LWAPP_MSGTYPE_RESET_RESPONSE                    27
 107 #define LWAPP_MSGTYPE_KEY_UPDATE_REQUEST                30
 108 #define LWAPP_MSGTYPE_KEY_UPDATE_RESPONSE               31
 109 #define LWAPP_MSGTYPE_PRIMARY_DISCOVERY_REQUEST         32
 110 #define LWAPP_MSGTYPE_PRIMARY_DISCOVERY_RESPONSE        33
 111 #define LWAPP_MSGTYPE_DATA_TRANSFER_REQUEST             34
 112 #define LWAPP_MSGTYPE_DATA_TRANSFER_RESPONSE            35
 113 #define LWAPP_MSGTYPE_CLEAR_CONFIG_INDICATION           36
 114 #define LWAPP_MSGTYPE_WLAN_CONFIG_REQUEST               37
 115 #define LWAPP_MSGTYPE_WLAN_CONFIG_RESPONSE              38
 116 #define LWAPP_MSGTYPE_MOBILE_CONFIG_REQUEST             39
 117 #define LWAPP_MSGTYPE_MOBILE_CONFIG_RESPONSE            40
 118
 119 static const struct tok lwapp_msg_type_values[] = {
 120     { LWAPP_MSGTYPE_DISCOVERY_REQUEST, "Discovery req"},
 121     { LWAPP_MSGTYPE_DISCOVERY_RESPONSE, "Discovery resp"},
 122     { LWAPP_MSGTYPE_JOIN_REQUEST, "Join req"},
 123     { LWAPP_MSGTYPE_JOIN_RESPONSE, "Join resp"},
 124     { LWAPP_MSGTYPE_JOIN_ACK, "Join ack"},
 125     { LWAPP_MSGTYPE_JOIN_CONFIRM, "Join confirm"},
 126     { LWAPP_MSGTYPE_CONFIGURE_REQUEST, "Configure req"},
 127     { LWAPP_MSGTYPE_CONFIGURE_RESPONSE, "Configure resp"},
 128     { LWAPP_MSGTYPE_CONF_UPDATE_REQUEST, "Update req"},
 129     { LWAPP_MSGTYPE_CONF_UPDATE_RESPONSE, "Update resp"},
 130     { LWAPP_MSGTYPE_WTP_EVENT_REQUEST, "WTP event req"},
 131     { LWAPP_MSGTYPE_WTP_EVENT_RESPONSE, "WTP event resp"},
 132     { LWAPP_MSGTYPE_CHANGE_STATE_EVENT_REQUEST, "Change state event req"},
 133     { LWAPP_MSGTYPE_CHANGE_STATE_EVENT_RESPONSE, "Change state event resp"},
 134     { LWAPP_MSGTYPE_ECHO_REQUEST, "Echo req"},
 135     { LWAPP_MSGTYPE_ECHO_RESPONSE, "Echo resp"},
 136     { LWAPP_MSGTYPE_IMAGE_DATA_REQUEST, "Image data req"},
 137     { LWAPP_MSGTYPE_IMAGE_DATA_RESPONSE, "Image data resp"},
 138     { LWAPP_MSGTYPE_RESET_REQUEST, "Channel status req"},
 139     { LWAPP_MSGTYPE_RESET_RESPONSE, "Channel status resp"},
 140     { LWAPP_MSGTYPE_KEY_UPDATE_REQUEST, "Key update req"},
 141     { LWAPP_MSGTYPE_KEY_UPDATE_RESPONSE, "Key update resp"},
 142     { LWAPP_MSGTYPE_PRIMARY_DISCOVERY_REQUEST, "Primary discovery req"},
 143     { LWAPP_MSGTYPE_PRIMARY_DISCOVERY_RESPONSE, "Primary discovery resp"},
 144     { LWAPP_MSGTYPE_DATA_TRANSFER_REQUEST, "Data transfer req"},
 145     { LWAPP_MSGTYPE_DATA_TRANSFER_RESPONSE, "Data transfer resp"},
 146     { LWAPP_MSGTYPE_CLEAR_CONFIG_INDICATION, "Clear config ind"},
 147     { LWAPP_MSGTYPE_WLAN_CONFIG_REQUEST, "Wlan config req"},
 148     { LWAPP_MSGTYPE_WLAN_CONFIG_RESPONSE, "Wlan config resp"},
 149     { LWAPP_MSGTYPE_MOBILE_CONFIG_REQUEST, "Mobile config req"},
 150     { LWAPP_MSGTYPE_MOBILE_CONFIG_RESPONSE, "Mobile config resp"},
 151     { 0, NULL}
 152 };
 153
 154 /*
 155  * LWAPP message elements
 156  *
 157  * 0                   1                   2                   3
 158  * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
 159  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 160  * |      Type     |             Length            |   Value ...   |
 161  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 162  */
 163 struct lwapp_message_header {
 164     uint8_t type;
 165     uint8_t length[2];
 166 };
 167
 168 void
 169 lwapp_control_print(netdissect_options *ndo,
 170                     const u_char *pptr, u_int len, int has_ap_ident)
 171 {
 172     const struct lwapp_transport_header *lwapp_trans_header;
 173     const struct lwapp_control_header *lwapp_control_header;
 174     const u_char *tptr;
 175     int  tlen;
 176     int  msg_tlen;
 177
 178     tptr=pptr;
 179
 180     if (has_ap_ident) {
 181         /* check if enough bytes for AP identity */
 182         ND_TCHECK2(*tptr, 6);
 183         lwapp_trans_header = (const struct lwapp_transport_header *)(pptr+6);
 184     } else {
 185         lwapp_trans_header = (const struct lwapp_transport_header *)pptr;
 186     }
 187     ND_TCHECK(*lwapp_trans_header);
 188
 189     /*
 190      * Sanity checking of the header.
 191      */
 192     if (LWAPP_EXTRACT_VERSION(lwapp_trans_header->version) != LWAPP_VERSION) {
 193         ND_PRINT((ndo, "LWAPP version %u packet not supported",
 194                LWAPP_EXTRACT_VERSION(lwapp_trans_header->version)));
 195         return;
 196     }
 197
 198     /* non-verbose */
 199     if (ndo->ndo_vflag < 1) {
 200         ND_PRINT((ndo, "LWAPPv%u, %s frame, Flags [%s], length %u",
 201                LWAPP_EXTRACT_VERSION(lwapp_trans_header->version),
 202                LWAPP_EXTRACT_CONTROL_BIT(lwapp_trans_header->version) ? "Control" : "Data",
 203                bittok2str(lwapp_header_bits_values,"none",(lwapp_trans_header->version)&0x07),
 204                len));
 205         return;
 206     }
 207
 208     /* ok they seem to want to know everything - lets fully decode it */
 209     tlen=EXTRACT_16BITS(lwapp_trans_header->length);
 210
 211     ND_PRINT((ndo, "LWAPPv%u, %s frame, Radio-id %u, Flags [%s], Frag-id %u, length %u",
 212            LWAPP_EXTRACT_VERSION(lwapp_trans_header->version),
 213            LWAPP_EXTRACT_CONTROL_BIT(lwapp_trans_header->version) ? "Control" : "Data",
 214            LWAPP_EXTRACT_RID(lwapp_trans_header->version),
 215            bittok2str(lwapp_header_bits_values,"none",(lwapp_trans_header->version)&0x07),
 216            lwapp_trans_header->frag_id,
 217            tlen));
 218
 219     if (has_ap_ident) {
 220         ND_PRINT((ndo, "\n\tAP identity: %s", etheraddr_string(ndo, tptr)));
 221         tptr+=sizeof(const struct lwapp_transport_header)+6;
 222     } else {
 223         tptr+=sizeof(const struct lwapp_transport_header);
 224     }
 225
 226     while(tlen>0) {
 227
 228         /* did we capture enough for fully decoding the object header ? */
 229         ND_TCHECK2(*tptr, sizeof(struct lwapp_control_header));
 230
 231         lwapp_control_header = (const struct lwapp_control_header *)tptr;
 232         msg_tlen = EXTRACT_16BITS(lwapp_control_header->len);
 233
 234         /* print message header */
 235         ND_PRINT((ndo, "\n\t  Msg type: %s (%u), Seqnum: %u, Msg len: %d, Session: 0x%08x",
 236                tok2str(lwapp_msg_type_values,"Unknown",lwapp_control_header->msg_type),
 237                lwapp_control_header->msg_type,
 238                lwapp_control_header->seq_num,
 239                msg_tlen,
 240                EXTRACT_32BITS(lwapp_control_header->session_id)));
 241
 242         /* did we capture enough for fully decoding the message */
 243         ND_TCHECK2(*tptr, msg_tlen);
 244
 245         /* XXX - Decode sub messages for each message */
 246         switch(lwapp_control_header->msg_type) {
 247         case LWAPP_MSGTYPE_DISCOVERY_REQUEST:
 248         case LWAPP_MSGTYPE_DISCOVERY_RESPONSE:
 249         case LWAPP_MSGTYPE_JOIN_REQUEST:
 250         case LWAPP_MSGTYPE_JOIN_RESPONSE:
 251         case LWAPP_MSGTYPE_JOIN_ACK:
 252         case LWAPP_MSGTYPE_JOIN_CONFIRM:
 253         case LWAPP_MSGTYPE_CONFIGURE_REQUEST:
 254         case LWAPP_MSGTYPE_CONFIGURE_RESPONSE:
 255         case LWAPP_MSGTYPE_CONF_UPDATE_REQUEST:
 256         case LWAPP_MSGTYPE_CONF_UPDATE_RESPONSE:
 257         case LWAPP_MSGTYPE_WTP_EVENT_REQUEST:
 258         case LWAPP_MSGTYPE_WTP_EVENT_RESPONSE:
 259         case LWAPP_MSGTYPE_CHANGE_STATE_EVENT_REQUEST:
 260         case LWAPP_MSGTYPE_CHANGE_STATE_EVENT_RESPONSE:
 261         case LWAPP_MSGTYPE_ECHO_REQUEST:
 262         case LWAPP_MSGTYPE_ECHO_RESPONSE:
 263         case LWAPP_MSGTYPE_IMAGE_DATA_REQUEST:
 264         case LWAPP_MSGTYPE_IMAGE_DATA_RESPONSE:
 265         case LWAPP_MSGTYPE_RESET_REQUEST:
 266         case LWAPP_MSGTYPE_RESET_RESPONSE:
 267         case LWAPP_MSGTYPE_KEY_UPDATE_REQUEST:
 268         case LWAPP_MSGTYPE_KEY_UPDATE_RESPONSE:
 269         case LWAPP_MSGTYPE_PRIMARY_DISCOVERY_REQUEST:
 270         case LWAPP_MSGTYPE_PRIMARY_DISCOVERY_RESPONSE:
 271         case LWAPP_MSGTYPE_DATA_TRANSFER_REQUEST:
 272         case LWAPP_MSGTYPE_DATA_TRANSFER_RESPONSE:
 273         case LWAPP_MSGTYPE_CLEAR_CONFIG_INDICATION:
 274         case LWAPP_MSGTYPE_WLAN_CONFIG_REQUEST:
 275         case LWAPP_MSGTYPE_WLAN_CONFIG_RESPONSE:
 276         case LWAPP_MSGTYPE_MOBILE_CONFIG_REQUEST:
 277         case LWAPP_MSGTYPE_MOBILE_CONFIG_RESPONSE:
 278         default:
 279             break;
 280         }
 281
 282         tptr += sizeof(struct lwapp_control_header) + msg_tlen;
 283         tlen -= sizeof(struct lwapp_control_header) + msg_tlen;
 284     }
 285     return;
 286
 287  trunc:
 288     ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
 289 }
 290
 291 void
 292 lwapp_data_print(netdissect_options *ndo,
 293                  const u_char *pptr, u_int len)
 294 {
 295     const struct lwapp_transport_header *lwapp_trans_header;
 296     const u_char *tptr;
 297     int tlen;
 298
 299     tptr=pptr;
 300
 301     /* check if enough bytes for AP identity */
 302     ND_TCHECK2(*tptr, 6);
 303     lwapp_trans_header = (const struct lwapp_transport_header *)pptr;
 304     ND_TCHECK(*lwapp_trans_header);
 305
 306     /*
 307      * Sanity checking of the header.
 308      */
 309     if (LWAPP_EXTRACT_VERSION(lwapp_trans_header->version) != LWAPP_VERSION) {
 310         ND_PRINT((ndo, "LWAPP version %u packet not supported",
 311                LWAPP_EXTRACT_VERSION(lwapp_trans_header->version)));
 312         return;
 313     }
 314
 315     /* non-verbose */
 316     if (ndo->ndo_vflag < 1) {
 317         ND_PRINT((ndo, "LWAPPv%u, %s frame, Flags [%s], length %u",
 318                LWAPP_EXTRACT_VERSION(lwapp_trans_header->version),
 319                LWAPP_EXTRACT_CONTROL_BIT(lwapp_trans_header->version) ? "Control" : "Data",
 320                bittok2str(lwapp_header_bits_values,"none",(lwapp_trans_header->version)&0x07),
 321                len));
 322         return;
 323     }
 324
 325     /* ok they seem to want to know everything - lets fully decode it */
 326     tlen=EXTRACT_16BITS(lwapp_trans_header->length);
 327
 328     ND_PRINT((ndo, "LWAPPv%u, %s frame, Radio-id  %u, Flags [%s], Frag-id  %u, length %u",
 329            LWAPP_EXTRACT_VERSION(lwapp_trans_header->version),
 330            LWAPP_EXTRACT_CONTROL_BIT(lwapp_trans_header->version) ? "Control" : "Data",
 331            LWAPP_EXTRACT_RID(lwapp_trans_header->version),
 332            bittok2str(lwapp_header_bits_values,"none",(lwapp_trans_header->version)&0x07),
 333            lwapp_trans_header->frag_id,
 334            tlen));
 335
 336     tptr+=sizeof(const struct lwapp_transport_header);
 337     tlen-=sizeof(const struct lwapp_transport_header);
 338
 339     /* FIX - An IEEE 802.11 frame follows - hexdump for now */
 340     print_unknown_data(ndo, tptr, "\n\t", tlen);
 341
 342     return;
 343
 344  trunc:
 345     ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
 346 }
 347
 348 /*
 349  * Local Variables:
 350  * c-style: whitesmith
 351  * c-basic-offset: 8
 352  * End:
 353  */