361 lines
13 KiB
C
361 lines
13 KiB
C
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/*
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* Copyright (c) 1998-2007 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 Light Weight Access Point Protocol as per draft-ohara-capwap-lwapp-04
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*
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* Original code by Carles Kishimoto <carles.kishimoto@gmail.com>
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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-lwapp.c,v 1.1 2007-07-24 16:07:30 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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/*
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* LWAPP transport (common) header
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* 0 1 2 3
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* 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
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* |VER| RID |C|F|L| Frag ID | Length |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Status/WLANs | Payload... |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*
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*/
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struct lwapp_transport_header {
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u_int8_t version;
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u_int8_t frag_id;
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u_int8_t length[2];
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u_int16_t status;
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};
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/*
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* LWAPP control header
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* 0 1 2 3
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* 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
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Message Type | Seq Num | Msg Element Length |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Session ID |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Msg Element [0..N] |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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struct lwapp_control_header {
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u_int8_t msg_type;
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u_int8_t seq_num;
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u_int8_t len[2];
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u_int8_t session_id[4];
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};
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#define LWAPP_VERSION 0
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#define LWAPP_EXTRACT_VERSION(x) (((x)&0xC0)>>6)
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#define LWAPP_EXTRACT_RID(x) (((x)&0x38)>>3)
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#define LWAPP_EXTRACT_CONTROL_BIT(x) (((x)&0x04)>>2)
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static const struct tok lwapp_header_bits_values[] = {
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{ 0x01, "Last Fragment Bit"},
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{ 0x02, "Fragment Bit"},
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{ 0x04, "Control Bit"},
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{ 0, NULL}
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};
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#define LWAPP_MSGTYPE_DISCOVERY_REQUEST 1
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#define LWAPP_MSGTYPE_DISCOVERY_RESPONSE 2
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#define LWAPP_MSGTYPE_JOIN_REQUEST 3
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#define LWAPP_MSGTYPE_JOIN_RESPONSE 4
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#define LWAPP_MSGTYPE_JOIN_ACK 5
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#define LWAPP_MSGTYPE_JOIN_CONFIRM 6
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#define LWAPP_MSGTYPE_CONFIGURE_REQUEST 10
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#define LWAPP_MSGTYPE_CONFIGURE_RESPONSE 11
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#define LWAPP_MSGTYPE_CONF_UPDATE_REQUEST 12
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#define LWAPP_MSGTYPE_CONF_UPDATE_RESPONSE 13
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#define LWAPP_MSGTYPE_WTP_EVENT_REQUEST 14
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#define LWAPP_MSGTYPE_WTP_EVENT_RESPONSE 15
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#define LWAPP_MSGTYPE_CHANGE_STATE_EVENT_REQUEST 16
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#define LWAPP_MSGTYPE_CHANGE_STATE_EVENT_RESPONSE 17
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#define LWAPP_MSGTYPE_ECHO_REQUEST 22
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#define LWAPP_MSGTYPE_ECHO_RESPONSE 23
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#define LWAPP_MSGTYPE_IMAGE_DATA_REQUEST 24
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#define LWAPP_MSGTYPE_IMAGE_DATA_RESPONSE 25
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#define LWAPP_MSGTYPE_RESET_REQUEST 26
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#define LWAPP_MSGTYPE_RESET_RESPONSE 27
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#define LWAPP_MSGTYPE_KEY_UPDATE_REQUEST 30
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#define LWAPP_MSGTYPE_KEY_UPDATE_RESPONSE 31
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#define LWAPP_MSGTYPE_PRIMARY_DISCOVERY_REQUEST 32
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#define LWAPP_MSGTYPE_PRIMARY_DISCOVERY_RESPONSE 33
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#define LWAPP_MSGTYPE_DATA_TRANSFER_REQUEST 34
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#define LWAPP_MSGTYPE_DATA_TRANSFER_RESPONSE 35
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#define LWAPP_MSGTYPE_CLEAR_CONFIG_INDICATION 36
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#define LWAPP_MSGTYPE_WLAN_CONFIG_REQUEST 37
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#define LWAPP_MSGTYPE_WLAN_CONFIG_RESPONSE 38
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#define LWAPP_MSGTYPE_MOBILE_CONFIG_REQUEST 39
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#define LWAPP_MSGTYPE_MOBILE_CONFIG_RESPONSE 40
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static const struct tok lwapp_msg_type_values[] = {
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{ LWAPP_MSGTYPE_DISCOVERY_REQUEST, "Discovery req"},
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{ LWAPP_MSGTYPE_DISCOVERY_RESPONSE, "Discovery resp"},
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{ LWAPP_MSGTYPE_JOIN_REQUEST, "Join req"},
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{ LWAPP_MSGTYPE_JOIN_RESPONSE, "Join resp"},
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{ LWAPP_MSGTYPE_JOIN_ACK, "Join ack"},
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{ LWAPP_MSGTYPE_JOIN_CONFIRM, "Join confirm"},
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{ LWAPP_MSGTYPE_CONFIGURE_REQUEST, "Configure req"},
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{ LWAPP_MSGTYPE_CONFIGURE_RESPONSE, "Configure resp"},
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{ LWAPP_MSGTYPE_CONF_UPDATE_REQUEST, "Update req"},
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{ LWAPP_MSGTYPE_CONF_UPDATE_RESPONSE, "Update resp"},
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{ LWAPP_MSGTYPE_WTP_EVENT_REQUEST, "WTP event req"},
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{ LWAPP_MSGTYPE_WTP_EVENT_RESPONSE, "WTP event resp"},
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{ LWAPP_MSGTYPE_CHANGE_STATE_EVENT_REQUEST, "Change state event req"},
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{ LWAPP_MSGTYPE_CHANGE_STATE_EVENT_RESPONSE, "Change state event resp"},
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{ LWAPP_MSGTYPE_ECHO_REQUEST, "Echo req"},
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{ LWAPP_MSGTYPE_ECHO_RESPONSE, "Echo resp"},
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{ LWAPP_MSGTYPE_IMAGE_DATA_REQUEST, "Image data req"},
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{ LWAPP_MSGTYPE_IMAGE_DATA_RESPONSE, "Image data resp"},
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{ LWAPP_MSGTYPE_RESET_REQUEST, "Channel status req"},
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{ LWAPP_MSGTYPE_RESET_RESPONSE, "Channel status resp"},
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{ LWAPP_MSGTYPE_KEY_UPDATE_REQUEST, "Key update req"},
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{ LWAPP_MSGTYPE_KEY_UPDATE_RESPONSE, "Key update resp"},
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{ LWAPP_MSGTYPE_PRIMARY_DISCOVERY_REQUEST, "Primary discovery req"},
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{ LWAPP_MSGTYPE_PRIMARY_DISCOVERY_RESPONSE, "Primary discovery resp"},
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{ LWAPP_MSGTYPE_DATA_TRANSFER_REQUEST, "Data transfer req"},
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{ LWAPP_MSGTYPE_DATA_TRANSFER_RESPONSE, "Data transfer resp"},
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{ LWAPP_MSGTYPE_CLEAR_CONFIG_INDICATION, "Clear config ind"},
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{ LWAPP_MSGTYPE_WLAN_CONFIG_REQUEST, "Wlan config req"},
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{ LWAPP_MSGTYPE_WLAN_CONFIG_RESPONSE, "Wlan config resp"},
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{ LWAPP_MSGTYPE_MOBILE_CONFIG_REQUEST, "Mobile config req"},
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{ LWAPP_MSGTYPE_MOBILE_CONFIG_RESPONSE, "Mobile config resp"},
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{ 0, NULL}
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};
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/*
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* LWAPP message elements
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*
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* 0 1 2 3
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* 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
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Type | Length | Value ... |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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struct lwapp_message_header {
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u_int8_t type;
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u_int8_t length[2];
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};
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void
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lwapp_control_print(const u_char *pptr, u_int len, int has_ap_ident) {
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const struct lwapp_transport_header *lwapp_trans_header;
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const struct lwapp_control_header *lwapp_control_header;
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const u_char *tptr;
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int hexdump,tlen;
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int msg_tlen;
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tptr=pptr;
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if (has_ap_ident) {
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/* check if enough bytes for AP identity */
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if (!TTEST2(*tptr, 6))
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goto trunc;
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lwapp_trans_header = (const struct lwapp_transport_header *)(pptr+6);
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} else {
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lwapp_trans_header = (const struct lwapp_transport_header *)pptr;
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}
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TCHECK(*lwapp_trans_header);
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/*
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* Sanity checking of the header.
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*/
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if (LWAPP_EXTRACT_VERSION(lwapp_trans_header->version) != LWAPP_VERSION) {
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printf("LWAPP version %u packet not supported",
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LWAPP_EXTRACT_VERSION(lwapp_trans_header->version));
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return;
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}
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/* non-verbose */
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if (vflag < 1) {
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printf("LWAPPv%u, %s frame, Flags [%s], length %u",
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LWAPP_EXTRACT_VERSION(lwapp_trans_header->version),
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LWAPP_EXTRACT_CONTROL_BIT(lwapp_trans_header->version) ? "Control" : "Data",
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bittok2str(lwapp_header_bits_values,"none",(lwapp_trans_header->version)&0x07),
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len);
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return;
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}
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/* ok they seem to want to know everything - lets fully decode it */
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tlen=EXTRACT_16BITS(lwapp_trans_header->length);
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printf("LWAPPv%u, %s frame, Radio-id %u, Flags [%s], Frag-id %u, length %u",
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LWAPP_EXTRACT_VERSION(lwapp_trans_header->version),
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LWAPP_EXTRACT_CONTROL_BIT(lwapp_trans_header->version) ? "Control" : "Data",
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LWAPP_EXTRACT_RID(lwapp_trans_header->version),
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bittok2str(lwapp_header_bits_values,"none",(lwapp_trans_header->version)&0x07),
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lwapp_trans_header->frag_id,
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tlen);
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if (has_ap_ident) {
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printf("\n\tAP identity: %s",
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etheraddr_string(tptr));
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tptr+=sizeof(const struct lwapp_transport_header)+6;
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} else {
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tptr+=sizeof(const struct lwapp_transport_header);
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}
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while(tlen>0) {
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/* did we capture enough for fully decoding the object header ? */
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if (!TTEST2(*tptr, sizeof(struct lwapp_control_header)))
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goto trunc;
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lwapp_control_header = (const struct lwapp_control_header *)tptr;
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msg_tlen = EXTRACT_16BITS(lwapp_control_header->len);
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/* print message header */
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printf("\n\t Msg type: %s (%u), Seqnum: %u, Msg len: %d, Session: 0x%08x",
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tok2str(lwapp_msg_type_values,"Unknown",lwapp_control_header->msg_type),
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lwapp_control_header->msg_type,
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lwapp_control_header->seq_num,
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msg_tlen,
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EXTRACT_32BITS(lwapp_control_header->session_id));
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/* did we capture enough for fully decoding the message */
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if (!TTEST2(*tptr, msg_tlen))
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goto trunc;
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hexdump=FALSE;
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/* XXX - Decode sub messages for each message */
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switch(lwapp_control_header->msg_type) {
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case LWAPP_MSGTYPE_DISCOVERY_REQUEST:
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case LWAPP_MSGTYPE_DISCOVERY_RESPONSE:
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case LWAPP_MSGTYPE_JOIN_REQUEST:
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case LWAPP_MSGTYPE_JOIN_RESPONSE:
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case LWAPP_MSGTYPE_JOIN_ACK:
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case LWAPP_MSGTYPE_JOIN_CONFIRM:
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case LWAPP_MSGTYPE_CONFIGURE_REQUEST:
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case LWAPP_MSGTYPE_CONFIGURE_RESPONSE:
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case LWAPP_MSGTYPE_CONF_UPDATE_REQUEST:
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case LWAPP_MSGTYPE_CONF_UPDATE_RESPONSE:
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case LWAPP_MSGTYPE_WTP_EVENT_REQUEST:
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case LWAPP_MSGTYPE_WTP_EVENT_RESPONSE:
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case LWAPP_MSGTYPE_CHANGE_STATE_EVENT_REQUEST:
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case LWAPP_MSGTYPE_CHANGE_STATE_EVENT_RESPONSE:
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case LWAPP_MSGTYPE_ECHO_REQUEST:
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case LWAPP_MSGTYPE_ECHO_RESPONSE:
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case LWAPP_MSGTYPE_IMAGE_DATA_REQUEST:
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case LWAPP_MSGTYPE_IMAGE_DATA_RESPONSE:
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case LWAPP_MSGTYPE_RESET_REQUEST:
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case LWAPP_MSGTYPE_RESET_RESPONSE:
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case LWAPP_MSGTYPE_KEY_UPDATE_REQUEST:
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case LWAPP_MSGTYPE_KEY_UPDATE_RESPONSE:
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case LWAPP_MSGTYPE_PRIMARY_DISCOVERY_REQUEST:
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case LWAPP_MSGTYPE_PRIMARY_DISCOVERY_RESPONSE:
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case LWAPP_MSGTYPE_DATA_TRANSFER_REQUEST:
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case LWAPP_MSGTYPE_DATA_TRANSFER_RESPONSE:
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case LWAPP_MSGTYPE_CLEAR_CONFIG_INDICATION:
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case LWAPP_MSGTYPE_WLAN_CONFIG_REQUEST:
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case LWAPP_MSGTYPE_WLAN_CONFIG_RESPONSE:
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case LWAPP_MSGTYPE_MOBILE_CONFIG_REQUEST:
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case LWAPP_MSGTYPE_MOBILE_CONFIG_RESPONSE:
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default:
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break;
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}
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tptr += sizeof(struct lwapp_control_header) + msg_tlen;
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tlen -= sizeof(struct lwapp_control_header) + msg_tlen;
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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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void
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lwapp_data_print(const u_char *pptr, u_int len) {
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const struct lwapp_transport_header *lwapp_trans_header;
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const u_char *tptr;
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int tlen;
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tptr=pptr;
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/* check if enough bytes for AP identity */
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if (!TTEST2(*tptr, 6))
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goto trunc;
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lwapp_trans_header = (const struct lwapp_transport_header *)pptr;
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TCHECK(*lwapp_trans_header);
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/*
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* Sanity checking of the header.
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*/
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if (LWAPP_EXTRACT_VERSION(lwapp_trans_header->version) != LWAPP_VERSION) {
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printf("LWAPP version %u packet not supported",
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LWAPP_EXTRACT_VERSION(lwapp_trans_header->version));
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|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* non-verbose */
|
||
|
|
if (vflag < 1) {
|
||
|
|
printf("LWAPPv%u, %s frame, Flags [%s], length %u",
|
||
|
|
LWAPP_EXTRACT_VERSION(lwapp_trans_header->version),
|
||
|
|
LWAPP_EXTRACT_CONTROL_BIT(lwapp_trans_header->version) ? "Control" : "Data",
|
||
|
|
bittok2str(lwapp_header_bits_values,"none",(lwapp_trans_header->version)&0x07),
|
||
|
|
len);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* ok they seem to want to know everything - lets fully decode it */
|
||
|
|
tlen=EXTRACT_16BITS(lwapp_trans_header->length);
|
||
|
|
|
||
|
|
printf("LWAPPv%u, %s frame, Radio-id %u, Flags [%s], Frag-id %u, length %u",
|
||
|
|
LWAPP_EXTRACT_VERSION(lwapp_trans_header->version),
|
||
|
|
LWAPP_EXTRACT_CONTROL_BIT(lwapp_trans_header->version) ? "Control" : "Data",
|
||
|
|
LWAPP_EXTRACT_RID(lwapp_trans_header->version),
|
||
|
|
bittok2str(lwapp_header_bits_values,"none",(lwapp_trans_header->version)&0x07),
|
||
|
|
lwapp_trans_header->frag_id,
|
||
|
|
tlen);
|
||
|
|
|
||
|
|
tptr+=sizeof(const struct lwapp_transport_header);
|
||
|
|
tlen-=sizeof(const struct lwapp_transport_header);
|
||
|
|
|
||
|
|
/* FIX - An IEEE 802.11 frame follows - hexdump for now */
|
||
|
|
print_unknown_data(tptr, "\n\t", tlen);
|
||
|
|
|
||
|
|
return;
|
||
|
|
|
||
|
|
trunc:
|
||
|
|
printf("\n\t\t packet exceeded snapshot");
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Local Variables:
|
||
|
|
* c-style: whitesmith
|
||
|
|
* c-basic-offset: 8
|
||
|
|
* End:
|
||
|
|
*/
|