/* * Copyright (c) 1998-2007 The TCPDUMP project * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that: (1) source code * distributions retain the above copyright notice and this paragraph * in its entirety, and (2) distributions including binary code include * the above copyright notice and this paragraph in its entirety in * the documentation or other materials provided with the distribution. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE. * * Support for the Light Weight Access Point Protocol as per draft-ohara-capwap-lwapp-04 * * Original code by Carles Kishimoto <carles.kishimoto@gmail.com> */#ifndef lintstatic const char rcsid[] _U_ ="@(#) $Header: /tcpdump/master/tcpdump/print-lwapp.c,v 1.1 2007-07-24 16:07:30 hannes Exp $";#endif#ifdef HAVE_CONFIG_H#include "config.h"#endif#include <tcpdump-stdinc.h>#include <stdio.h>#include <stdlib.h>#include <string.h>#include "interface.h"#include "extract.h"#include "addrtoname.h"/*  * LWAPP transport (common) header *      0                   1                   2                   3 *     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 *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ *    |VER| RID |C|F|L|    Frag ID    |            Length             | *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ *    |          Status/WLANs         |   Payload...  | *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * */struct lwapp_transport_header {    u_int8_t  version;    u_int8_t  frag_id;    u_int8_t  length[2];    u_int16_t status;};/* * LWAPP control header *      0                   1                   2                   3 *      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 *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ *     |  Message Type |    Seq Num    |      Msg Element Length       | *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ *     |                           Session ID                          | *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ *     |      Msg Element [0..N]       | *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */struct lwapp_control_header {    u_int8_t  msg_type;    u_int8_t  seq_num;    u_int8_t  len[2];    u_int8_t  session_id[4];};#define LWAPP_VERSION 0#define	LWAPP_EXTRACT_VERSION(x) (((x)&0xC0)>>6) #define	LWAPP_EXTRACT_RID(x) (((x)&0x38)>>3) #define LWAPP_EXTRACT_CONTROL_BIT(x) (((x)&0x04)>>2) static const struct tok lwapp_header_bits_values[] = {    { 0x01, "Last Fragment Bit"},    { 0x02, "Fragment Bit"},    { 0x04, "Control Bit"},    { 0, NULL}};#define	LWAPP_MSGTYPE_DISCOVERY_REQUEST			1#define	LWAPP_MSGTYPE_DISCOVERY_RESPONSE		2#define	LWAPP_MSGTYPE_JOIN_REQUEST			3#define LWAPP_MSGTYPE_JOIN_RESPONSE			4#define LWAPP_MSGTYPE_JOIN_ACK				5#define LWAPP_MSGTYPE_JOIN_CONFIRM			6#define LWAPP_MSGTYPE_CONFIGURE_REQUEST			10#define LWAPP_MSGTYPE_CONFIGURE_RESPONSE		11#define LWAPP_MSGTYPE_CONF_UPDATE_REQUEST		12#define LWAPP_MSGTYPE_CONF_UPDATE_RESPONSE		13#define LWAPP_MSGTYPE_WTP_EVENT_REQUEST			14#define LWAPP_MSGTYPE_WTP_EVENT_RESPONSE		15#define LWAPP_MSGTYPE_CHANGE_STATE_EVENT_REQUEST	16#define LWAPP_MSGTYPE_CHANGE_STATE_EVENT_RESPONSE	17#define LWAPP_MSGTYPE_ECHO_REQUEST			22#define LWAPP_MSGTYPE_ECHO_RESPONSE			23#define LWAPP_MSGTYPE_IMAGE_DATA_REQUEST		24#define LWAPP_MSGTYPE_IMAGE_DATA_RESPONSE		25#define LWAPP_MSGTYPE_RESET_REQUEST			26#define LWAPP_MSGTYPE_RESET_RESPONSE			27#define LWAPP_MSGTYPE_KEY_UPDATE_REQUEST		30#define LWAPP_MSGTYPE_KEY_UPDATE_RESPONSE		31#define LWAPP_MSGTYPE_PRIMARY_DISCOVERY_REQUEST		32#define LWAPP_MSGTYPE_PRIMARY_DISCOVERY_RESPONSE	33#define LWAPP_MSGTYPE_DATA_TRANSFER_REQUEST		34#define LWAPP_MSGTYPE_DATA_TRANSFER_RESPONSE		35#define LWAPP_MSGTYPE_CLEAR_CONFIG_INDICATION		36#define LWAPP_MSGTYPE_WLAN_CONFIG_REQUEST		37#define LWAPP_MSGTYPE_WLAN_CONFIG_RESPONSE		38#define LWAPP_MSGTYPE_MOBILE_CONFIG_REQUEST		39#define LWAPP_MSGTYPE_MOBILE_CONFIG_RESPONSE		40static const struct tok lwapp_msg_type_values[] = {    { LWAPP_MSGTYPE_DISCOVERY_REQUEST, "Discovery req"},    { LWAPP_MSGTYPE_DISCOVERY_RESPONSE, "Discovery resp"},    { LWAPP_MSGTYPE_JOIN_REQUEST, "Join req"},    { LWAPP_MSGTYPE_JOIN_RESPONSE, "Join resp"},    { LWAPP_MSGTYPE_JOIN_ACK, "Join ack"},    { LWAPP_MSGTYPE_JOIN_CONFIRM, "Join confirm"},    { LWAPP_MSGTYPE_CONFIGURE_REQUEST, "Configure req"},    { LWAPP_MSGTYPE_CONFIGURE_RESPONSE, "Configure resp"},    { LWAPP_MSGTYPE_CONF_UPDATE_REQUEST, "Update req"},    { LWAPP_MSGTYPE_CONF_UPDATE_RESPONSE, "Update resp"},    { LWAPP_MSGTYPE_WTP_EVENT_REQUEST, "WTP event req"},    { LWAPP_MSGTYPE_WTP_EVENT_RESPONSE, "WTP event resp"},    { LWAPP_MSGTYPE_CHANGE_STATE_EVENT_REQUEST, "Change state event req"},    { LWAPP_MSGTYPE_CHANGE_STATE_EVENT_RESPONSE, "Change state event resp"},    { LWAPP_MSGTYPE_ECHO_REQUEST, "Echo req"},    { LWAPP_MSGTYPE_ECHO_RESPONSE, "Echo resp"},    { LWAPP_MSGTYPE_IMAGE_DATA_REQUEST, "Image data req"},    { LWAPP_MSGTYPE_IMAGE_DATA_RESPONSE, "Image data resp"},    { LWAPP_MSGTYPE_RESET_REQUEST, "Channel status req"},    { LWAPP_MSGTYPE_RESET_RESPONSE, "Channel status resp"},    { LWAPP_MSGTYPE_KEY_UPDATE_REQUEST, "Key update req"},    { LWAPP_MSGTYPE_KEY_UPDATE_RESPONSE, "Key update resp"},    { LWAPP_MSGTYPE_PRIMARY_DISCOVERY_REQUEST, "Primary discovery req"},    { LWAPP_MSGTYPE_PRIMARY_DISCOVERY_RESPONSE, "Primary discovery resp"},    { LWAPP_MSGTYPE_DATA_TRANSFER_REQUEST, "Data transfer req"},    { LWAPP_MSGTYPE_DATA_TRANSFER_RESPONSE, "Data transfer resp"},    { LWAPP_MSGTYPE_CLEAR_CONFIG_INDICATION, "Clear config ind"},    { LWAPP_MSGTYPE_WLAN_CONFIG_REQUEST, "Wlan config req"},    { LWAPP_MSGTYPE_WLAN_CONFIG_RESPONSE, "Wlan config resp"},    { LWAPP_MSGTYPE_MOBILE_CONFIG_REQUEST, "Mobile config req"},    { LWAPP_MSGTYPE_MOBILE_CONFIG_RESPONSE, "Mobile config resp"},    { 0, NULL}};/*  * LWAPP message elements *  * 0                   1                   2                   3 * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * |      Type     |             Length            |   Value ...   | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */struct lwapp_message_header {    u_int8_t type;    u_int8_t length[2];};voidlwapp_control_print(const u_char *pptr, u_int len, int has_ap_ident) {    const struct lwapp_transport_header *lwapp_trans_header;    const struct lwapp_control_header *lwapp_control_header;    const u_char *tptr;    int hexdump,tlen;    int  msg_tlen;    tptr=pptr;    if (has_ap_ident) {        /* check if enough bytes for AP identity */        if (!TTEST2(*tptr, 6))            goto trunc;        lwapp_trans_header = (const struct lwapp_transport_header *)(pptr+6);    } else {        lwapp_trans_header = (const struct lwapp_transport_header *)pptr;    }    TCHECK(*lwapp_trans_header);    /*     * Sanity checking of the header.     */    if (LWAPP_EXTRACT_VERSION(lwapp_trans_header->version) != LWAPP_VERSION) {	printf("LWAPP version %u packet not supported",               LWAPP_EXTRACT_VERSION(lwapp_trans_header->version));	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);    if (has_ap_ident) {        printf("\n\tAP identity: %s",               etheraddr_string(tptr));        tptr+=sizeof(const struct lwapp_transport_header)+6;    } else {        tptr+=sizeof(const struct lwapp_transport_header);    }    while(tlen>0) {        /* did we capture enough for fully decoding the object header ? */        if (!TTEST2(*tptr, sizeof(struct lwapp_control_header)))            goto trunc;        lwapp_control_header = (const struct lwapp_control_header *)tptr;	msg_tlen = EXTRACT_16BITS(lwapp_control_header->len);	/* print message header */         printf("\n\t  Msg type: %s (%u), Seqnum: %u, Msg len: %d, Session: 0x%08x",               tok2str(lwapp_msg_type_values,"Unknown",lwapp_control_header->msg_type),               lwapp_control_header->msg_type,               lwapp_control_header->seq_num,               msg_tlen,               EXTRACT_32BITS(lwapp_control_header->session_id));        /* did we capture enough for fully decoding the message */        if (!TTEST2(*tptr, msg_tlen))            goto trunc;        hexdump=FALSE;	/* XXX - Decode sub messages for each message */        switch(lwapp_control_header->msg_type) {        case LWAPP_MSGTYPE_DISCOVERY_REQUEST:        case LWAPP_MSGTYPE_DISCOVERY_RESPONSE:        case LWAPP_MSGTYPE_JOIN_REQUEST:        case LWAPP_MSGTYPE_JOIN_RESPONSE:        case LWAPP_MSGTYPE_JOIN_ACK:        case LWAPP_MSGTYPE_JOIN_CONFIRM:        case LWAPP_MSGTYPE_CONFIGURE_REQUEST:        case LWAPP_MSGTYPE_CONFIGURE_RESPONSE:        case LWAPP_MSGTYPE_CONF_UPDATE_REQUEST:        case LWAPP_MSGTYPE_CONF_UPDATE_RESPONSE:        case LWAPP_MSGTYPE_WTP_EVENT_REQUEST:        case LWAPP_MSGTYPE_WTP_EVENT_RESPONSE:        case LWAPP_MSGTYPE_CHANGE_STATE_EVENT_REQUEST:        case LWAPP_MSGTYPE_CHANGE_STATE_EVENT_RESPONSE:        case LWAPP_MSGTYPE_ECHO_REQUEST:        case LWAPP_MSGTYPE_ECHO_RESPONSE:        case LWAPP_MSGTYPE_IMAGE_DATA_REQUEST:        case LWAPP_MSGTYPE_IMAGE_DATA_RESPONSE:        case LWAPP_MSGTYPE_RESET_REQUEST:        case LWAPP_MSGTYPE_RESET_RESPONSE:        case LWAPP_MSGTYPE_KEY_UPDATE_REQUEST:        case LWAPP_MSGTYPE_KEY_UPDATE_RESPONSE:        case LWAPP_MSGTYPE_PRIMARY_DISCOVERY_REQUEST:        case LWAPP_MSGTYPE_PRIMARY_DISCOVERY_RESPONSE:        case LWAPP_MSGTYPE_DATA_TRANSFER_REQUEST:        case LWAPP_MSGTYPE_DATA_TRANSFER_RESPONSE:        case LWAPP_MSGTYPE_CLEAR_CONFIG_INDICATION:        case LWAPP_MSGTYPE_WLAN_CONFIG_REQUEST:        case LWAPP_MSGTYPE_WLAN_CONFIG_RESPONSE:        case LWAPP_MSGTYPE_MOBILE_CONFIG_REQUEST:        case LWAPP_MSGTYPE_MOBILE_CONFIG_RESPONSE:        default:            break;        }        tptr += sizeof(struct lwapp_control_header) + msg_tlen;        tlen -= sizeof(struct lwapp_control_header) + msg_tlen;    }    return; trunc:    printf("\n\t\t packet exceeded snapshot");}voidlwapp_data_print(const u_char *pptr, u_int len) {    const struct lwapp_transport_header *lwapp_trans_header;    const u_char *tptr;    int tlen;    tptr=pptr;    /* check if enough bytes for AP identity */    if (!TTEST2(*tptr, 6))        goto trunc;    lwapp_trans_header = (const struct lwapp_transport_header *)pptr;    TCHECK(*lwapp_trans_header);    /*     * Sanity checking of the header.     */    if (LWAPP_EXTRACT_VERSION(lwapp_trans_header->version) != LWAPP_VERSION) {        printf("LWAPP version %u packet not supported",               LWAPP_EXTRACT_VERSION(lwapp_trans_header->version));        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: */