--- /dev/null
+/*
+ * 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
+ *
+ */
+
+#ifndef lint
+static 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 40
+
+static 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];
+};
+
+void
+lwapp_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");
+}
+
+void
+lwapp_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:
+ */
projects / tcpdump / commitdiff
