703 lines
20 KiB
C
703 lines
20 KiB
C
/*
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* Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997
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* The Regents of the University of California. All rights reserved.
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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 distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* L2TP support contributed by Motonori Shindo (mshindo@mshindo.net)
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*/
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#ifndef lint
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static const char rcsid[] =
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"@(#) $Header: /tcpdump/master/tcpdump/print-l2tp.c,v 1.10.2.1 2002/05/25 09:47:07 guy 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 <stdio.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include "l2tp.h"
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#include "interface.h"
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#include "extract.h"
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static char tstr[] = " [|l2tp]";
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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#define L2TP_MSGTYPE_SCCRQ 1 /* Start-Control-Connection-Request */
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#define L2TP_MSGTYPE_SCCRP 2 /* Start-Control-Connection-Reply */
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#define L2TP_MSGTYPE_SCCCN 3 /* Start-Control-Connection-Connected */
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#define L2TP_MSGTYPE_STOPCCN 4 /* Stop-Control-Connection-Notification */
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#define L2TP_MSGTYPE_HELLO 6 /* Hello */
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#define L2TP_MSGTYPE_OCRQ 7 /* Outgoing-Call-Request */
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#define L2TP_MSGTYPE_OCRP 8 /* Outgoing-Call-Reply */
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#define L2TP_MSGTYPE_OCCN 9 /* Outgoing-Call-Connected */
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#define L2TP_MSGTYPE_ICRQ 10 /* Incoming-Call-Request */
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#define L2TP_MSGTYPE_ICRP 11 /* Incoming-Call-Reply */
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#define L2TP_MSGTYPE_ICCN 12 /* Incoming-Call-Connected */
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#define L2TP_MSGTYPE_CDN 14 /* Call-Disconnect-Notify */
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#define L2TP_MSGTYPE_WEN 15 /* WAN-Error-Notify */
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#define L2TP_MSGTYPE_SLI 16 /* Set-Link-Info */
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static struct tok l2tp_msgtype2str[] = {
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{ L2TP_MSGTYPE_SCCRQ, "SCCRQ" },
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{ L2TP_MSGTYPE_SCCRP, "SCCRP" },
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{ L2TP_MSGTYPE_SCCCN, "SCCCN" },
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{ L2TP_MSGTYPE_STOPCCN, "StopCCN" },
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{ L2TP_MSGTYPE_HELLO, "HELLO" },
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{ L2TP_MSGTYPE_OCRQ, "OCRQ" },
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{ L2TP_MSGTYPE_OCRP, "OCRP" },
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{ L2TP_MSGTYPE_OCCN, "OCCN" },
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{ L2TP_MSGTYPE_ICRQ, "ICRQ" },
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{ L2TP_MSGTYPE_ICRP, "ICRP" },
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{ L2TP_MSGTYPE_ICCN, "ICCN" },
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{ L2TP_MSGTYPE_CDN, "CDN" },
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{ L2TP_MSGTYPE_WEN, "WEN" },
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{ L2TP_MSGTYPE_SLI, "SLI" },
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{ 0, NULL }
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};
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#define L2TP_AVP_MSGTYPE 0 /* Message Type */
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#define L2TP_AVP_RESULT_CODE 1 /* Result Code */
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#define L2TP_AVP_PROTO_VER 2 /* Protocol Version */
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#define L2TP_AVP_FRAMING_CAP 3 /* Framing Capabilities */
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#define L2TP_AVP_BEARER_CAP 4 /* Bearer Capabilities */
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#define L2TP_AVP_TIE_BREAKER 5 /* Tie Breaker */
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#define L2TP_AVP_FIRM_VER 6 /* Firmware Revision */
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#define L2TP_AVP_HOST_NAME 7 /* Host Name */
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#define L2TP_AVP_VENDOR_NAME 8 /* Vendor Name */
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#define L2TP_AVP_ASSND_TUN_ID 9 /* Assigned Tunnel ID */
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#define L2TP_AVP_RECV_WIN_SIZE 10 /* Receive Window Size */
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#define L2TP_AVP_CHALLENGE 11 /* Challenge */
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#define L2TP_AVP_Q931_CC 12 /* Q.931 Cause Code */
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#define L2TP_AVP_CHALLENGE_RESP 13 /* Challenge Response */
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#define L2TP_AVP_ASSND_SESS_ID 14 /* Assigned Session ID */
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#define L2TP_AVP_CALL_SER_NUM 15 /* Call Serial Number */
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#define L2TP_AVP_MINIMUM_BPS 16 /* Minimum BPS */
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#define L2TP_AVP_MAXIMUM_BPS 17 /* Maximum BPS */
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#define L2TP_AVP_BEARER_TYPE 18 /* Bearer Type */
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#define L2TP_AVP_FRAMING_TYPE 19 /* Framing Type */
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#define L2TP_AVP_PACKET_PROC_DELAY 20 /* Packet Processing Delay (OBSOLETE) */
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#define L2TP_AVP_CALLED_NUMBER 21 /* Called Number */
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#define L2TP_AVP_CALLING_NUMBER 22 /* Calling Number */
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#define L2TP_AVP_SUB_ADDRESS 23 /* Sub-Address */
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#define L2TP_AVP_TX_CONN_SPEED 24 /* (Tx) Connect Speed */
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#define L2TP_AVP_PHY_CHANNEL_ID 25 /* Physical Channel ID */
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#define L2TP_AVP_INI_RECV_LCP 26 /* Initial Received LCP CONFREQ */
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#define L2TP_AVP_LAST_SENT_LCP 27 /* Last Sent LCP CONFREQ */
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#define L2TP_AVP_LAST_RECV_LCP 28 /* Last Received LCP CONFREQ */
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#define L2TP_AVP_PROXY_AUTH_TYPE 29 /* Proxy Authen Type */
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#define L2TP_AVP_PROXY_AUTH_NAME 30 /* Proxy Authen Name */
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#define L2TP_AVP_PROXY_AUTH_CHAL 31 /* Proxy Authen Challenge */
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#define L2TP_AVP_PROXY_AUTH_ID 32 /* Proxy Authen ID */
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#define L2TP_AVP_PROXY_AUTH_RESP 33 /* Proxy Authen Response */
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#define L2TP_AVP_CALL_ERRORS 34 /* Call Errors */
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#define L2TP_AVP_ACCM 35 /* ACCM */
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#define L2TP_AVP_RANDOM_VECTOR 36 /* Random Vector */
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#define L2TP_AVP_PRIVATE_GRP_ID 37 /* Private Group ID */
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#define L2TP_AVP_RX_CONN_SPEED 38 /* (Rx) Connect Speed */
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#define L2TP_AVP_SEQ_REQUIRED 39 /* Sequencing Required */
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#define L2TP_AVP_PPP_DISCON_CC 46 /* PPP Disconnect Cause Code */
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static struct tok l2tp_avp2str[] = {
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{ L2TP_AVP_MSGTYPE, "MSGTYPE" },
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{ L2TP_AVP_RESULT_CODE, "RESULT_CODE" },
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{ L2TP_AVP_PROTO_VER, "PROTO_VER" },
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{ L2TP_AVP_FRAMING_CAP, "FRAMING_CAP" },
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{ L2TP_AVP_BEARER_CAP, "BEARER_CAP" },
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{ L2TP_AVP_TIE_BREAKER, "TIE_BREAKER" },
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{ L2TP_AVP_FIRM_VER, "FIRM_VER" },
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{ L2TP_AVP_HOST_NAME, "HOST_NAME" },
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{ L2TP_AVP_VENDOR_NAME, "VENDOR_NAME" },
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{ L2TP_AVP_ASSND_TUN_ID, "ASSND_TUN_ID" },
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{ L2TP_AVP_RECV_WIN_SIZE, "RECV_WIN_SIZE" },
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{ L2TP_AVP_CHALLENGE, "CHALLENGE" },
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{ L2TP_AVP_Q931_CC, "Q931_CC", },
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{ L2TP_AVP_CHALLENGE_RESP, "CHALLENGE_RESP" },
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{ L2TP_AVP_ASSND_SESS_ID, "ASSND_SESS_ID" },
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{ L2TP_AVP_CALL_SER_NUM, "CALL_SER_NUM" },
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{ L2TP_AVP_MINIMUM_BPS, "MINIMUM_BPS" },
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{ L2TP_AVP_MAXIMUM_BPS, "MAXIMUM_BPS" },
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{ L2TP_AVP_BEARER_TYPE, "BEARER_TYPE" },
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{ L2TP_AVP_FRAMING_TYPE, "FRAMING_TYPE" },
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{ L2TP_AVP_PACKET_PROC_DELAY, "PACKET_PROC_DELAY" },
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{ L2TP_AVP_CALLED_NUMBER, "CALLED_NUMBER" },
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{ L2TP_AVP_CALLING_NUMBER, "CALLING_NUMBER" },
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{ L2TP_AVP_SUB_ADDRESS, "SUB_ADDRESS" },
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{ L2TP_AVP_TX_CONN_SPEED, "TX_CONN_SPEED" },
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{ L2TP_AVP_PHY_CHANNEL_ID, "PHY_CHANNEL_ID" },
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{ L2TP_AVP_INI_RECV_LCP, "INI_RECV_LCP" },
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{ L2TP_AVP_LAST_SENT_LCP, "LAST_SENT_LCP" },
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{ L2TP_AVP_LAST_RECV_LCP, "LAST_RECV_LCP" },
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{ L2TP_AVP_PROXY_AUTH_TYPE, "PROXY_AUTH_TYPE" },
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{ L2TP_AVP_PROXY_AUTH_NAME, "PROXY_AUTH_NAME" },
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{ L2TP_AVP_PROXY_AUTH_CHAL, "PROXY_AUTH_CHAL" },
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{ L2TP_AVP_PROXY_AUTH_ID, "PROXY_AUTH_ID" },
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{ L2TP_AVP_PROXY_AUTH_RESP, "PROXY_AUTH_RESP" },
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{ L2TP_AVP_CALL_ERRORS, "CALL_ERRORS" },
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{ L2TP_AVP_ACCM, "ACCM" },
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{ L2TP_AVP_RANDOM_VECTOR, "RANDOM_VECTOR" },
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{ L2TP_AVP_PRIVATE_GRP_ID, "PRIVATE_GRP_ID" },
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{ L2TP_AVP_RX_CONN_SPEED, "RX_CONN_SPEED" },
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{ L2TP_AVP_SEQ_REQUIRED, "SEQ_REQUIRED" },
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{ L2TP_AVP_PPP_DISCON_CC, "PPP_DISCON_CC" },
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{ 0, NULL }
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};
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static struct tok l2tp_authentype2str[] = {
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{ L2TP_AUTHEN_TYPE_RESERVED, "Reserved" },
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{ L2TP_AUTHEN_TYPE_TEXTUAL, "Textual" },
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{ L2TP_AUTHEN_TYPE_CHAP, "CHAP" },
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{ L2TP_AUTHEN_TYPE_PAP, "PAP" },
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{ L2TP_AUTHEN_TYPE_NO_AUTH, "No Auth" },
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{ L2TP_AUTHEN_TYPE_MSCHAPv1, "MS-CHAPv1" },
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{ 0, NULL }
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};
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#define L2TP_PPP_DISCON_CC_DIRECTION_GLOBAL 0
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#define L2TP_PPP_DISCON_CC_DIRECTION_AT_PEER 1
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#define L2TP_PPP_DISCON_CC_DIRECTION_AT_LOCAL 2
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static struct tok l2tp_cc_direction2str[] = {
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{ L2TP_PPP_DISCON_CC_DIRECTION_GLOBAL, "global error" },
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{ L2TP_PPP_DISCON_CC_DIRECTION_AT_PEER, "at peer" },
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{ L2TP_PPP_DISCON_CC_DIRECTION_AT_LOCAL,"at local" },
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{ 0, NULL }
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};
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#if 0
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static char *l2tp_result_code_StopCCN[] = {
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"Reserved",
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"General request to clear control connection",
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"General error--Error Code indicates the problem",
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"Control channel already exists",
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"Requester is not authorized to establish a control channel",
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"The protocol version of the requester is not supported",
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"Requester is being shut down",
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"Finite State Machine error"
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#define L2TP_MAX_RESULT_CODE_STOPCC_INDEX 8
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};
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#endif
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#if 0
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static char *l2tp_result_code_CDN[] = {
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"Reserved",
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"Call disconnected due to loss of carrier",
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"Call disconnected for the reason indicated in error code",
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"Call disconnected for administrative reasons",
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"Call failed due to lack of appropriate facilities being " \
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"available (temporary condition)",
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"Call failed due to lack of appropriate facilities being " \
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"available (permanent condition)",
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"Invalid destination",
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"Call failed due to no carrier detected",
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"Call failed due to detection of a busy signal",
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"Call failed due to lack of a dial tone",
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"Call was not established within time allotted by LAC",
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"Call was connected but no appropriate framing was detected"
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#define L2TP_MAX_RESULT_CODE_CDN_INDEX 12
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};
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#endif
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#if 0
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static char *l2tp_error_code_general[] = {
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"No general error",
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"No control connection exists yet for this LAC-LNS pair",
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"Length is wrong",
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"One of the field values was out of range or " \
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"reserved field was non-zero"
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"Insufficient resources to handle this operation now",
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"The Session ID is invalid in this context",
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"A generic vendor-specific error occurred in the LAC",
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"Try another"
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#define L2TP_MAX_ERROR_CODE_GENERAL_INDEX 8
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};
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#endif
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/******************************/
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/* generic print out routines */
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/******************************/
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static void
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print_string(const u_char *dat, u_int length)
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{
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int i;
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for (i=0; i<length; i++) {
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printf("%c", *dat++);
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}
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}
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static void
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print_octets(const u_char *dat, u_int length)
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{
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int i;
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for (i=0; i<length; i++) {
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printf("%02x", *dat++);
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}
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}
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static void
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print_16bits_val(const u_int16_t *dat)
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{
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printf("%u", EXTRACT_16BITS(dat));
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}
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static void
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print_32bits_val(const u_int32_t *dat)
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{
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printf("%lu", (u_long)EXTRACT_32BITS(dat));
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}
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/***********************************/
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/* AVP-specific print out routines */
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/***********************************/
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static void
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l2tp_msgtype_print(const u_char *dat)
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{
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u_int16_t *ptr = (u_int16_t*)dat;
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printf("%s", tok2str(l2tp_msgtype2str, "MSGTYPE-#%u",
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EXTRACT_16BITS(ptr)));
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}
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static void
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l2tp_result_code_print(const u_char *dat, u_int length)
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{
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u_int16_t *ptr = (u_int16_t *)dat;
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printf("%u", EXTRACT_16BITS(ptr)); ptr++; /* Result Code */
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if (length > 2) { /* Error Code (opt) */
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printf("/%u", EXTRACT_16BITS(ptr)); ptr++;
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}
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if (length > 4) { /* Error Message (opt) */
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printf(" ");
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print_string((u_char *)ptr, length - 4);
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}
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}
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static void
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l2tp_proto_ver_print(const u_int16_t *dat)
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{
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printf("%u.%u", (EXTRACT_16BITS(dat) >> 8),
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(EXTRACT_16BITS(dat) & 0xff));
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}
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static void
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l2tp_framing_cap_print(const u_char *dat)
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{
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u_int32_t *ptr = (u_int32_t *)dat;
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if (EXTRACT_32BITS(ptr) & L2TP_FRAMING_CAP_ASYNC_MASK) {
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printf("A");
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}
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if (EXTRACT_32BITS(ptr) & L2TP_FRAMING_CAP_SYNC_MASK) {
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printf("S");
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}
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}
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static void
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l2tp_bearer_cap_print(const u_char *dat)
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{
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u_int32_t *ptr = (u_int32_t *)dat;
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if (EXTRACT_32BITS(ptr) & L2TP_BEARER_CAP_ANALOG_MASK) {
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printf("A");
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}
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if (EXTRACT_32BITS(ptr) & L2TP_BEARER_CAP_DIGITAL_MASK) {
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printf("D");
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}
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}
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static void
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l2tp_q931_cc_print(const u_char *dat, u_int length)
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{
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print_16bits_val((u_int16_t *)dat);
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printf(", %02x", dat[2]);
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if (length > 3) {
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printf(" ");
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print_string(dat+3, length-3);
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}
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}
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static void
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l2tp_bearer_type_print(const u_char *dat)
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{
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u_int32_t *ptr = (u_int32_t *)dat;
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if (EXTRACT_32BITS(ptr) & L2TP_BEARER_TYPE_ANALOG_MASK) {
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printf("A");
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}
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if (EXTRACT_32BITS(ptr) & L2TP_BEARER_TYPE_DIGITAL_MASK) {
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printf("D");
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}
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}
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static void
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l2tp_framing_type_print(const u_char *dat)
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{
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u_int32_t *ptr = (u_int32_t *)dat;
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if (EXTRACT_32BITS(ptr) & L2TP_FRAMING_TYPE_ASYNC_MASK) {
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printf("A");
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}
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if (EXTRACT_32BITS(ptr) & L2TP_FRAMING_TYPE_SYNC_MASK) {
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printf("S");
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}
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}
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static void
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l2tp_packet_proc_delay_print(void)
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{
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printf("obsolete");
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}
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static void
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l2tp_proxy_auth_type_print(const u_char *dat)
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{
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u_int16_t *ptr = (u_int16_t *)dat;
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printf("%s", tok2str(l2tp_authentype2str,
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"AuthType-#%u", EXTRACT_16BITS(ptr)));
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}
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static void
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l2tp_proxy_auth_id_print(const u_char *dat)
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{
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u_int16_t *ptr = (u_int16_t *)dat;
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printf("%u", EXTRACT_16BITS(ptr) & L2TP_PROXY_AUTH_ID_MASK);
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}
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static void
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l2tp_call_errors_print(const u_char *dat)
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{
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u_int16_t *ptr = (u_int16_t *)dat;
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u_int16_t val_h, val_l;
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ptr++; /* skip "Reserved" */
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val_h = EXTRACT_16BITS(ptr); ptr++;
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val_l = EXTRACT_16BITS(ptr); ptr++;
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printf("CRCErr=%u ", (val_h<<16) + val_l);
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val_h = EXTRACT_16BITS(ptr); ptr++;
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val_l = EXTRACT_16BITS(ptr); ptr++;
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printf("FrameErr=%u ", (val_h<<16) + val_l);
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val_h = EXTRACT_16BITS(ptr); ptr++;
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val_l = EXTRACT_16BITS(ptr); ptr++;
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printf("HardOver=%u ", (val_h<<16) + val_l);
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val_h = EXTRACT_16BITS(ptr); ptr++;
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val_l = EXTRACT_16BITS(ptr); ptr++;
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printf("BufOver=%u ", (val_h<<16) + val_l);
|
|
|
|
val_h = EXTRACT_16BITS(ptr); ptr++;
|
|
val_l = EXTRACT_16BITS(ptr); ptr++;
|
|
printf("Timeout=%u ", (val_h<<16) + val_l);
|
|
|
|
val_h = EXTRACT_16BITS(ptr); ptr++;
|
|
val_l = EXTRACT_16BITS(ptr); ptr++;
|
|
printf("AlignErr=%u ", (val_h<<16) + val_l);
|
|
}
|
|
|
|
static void
|
|
l2tp_accm_print(const u_char *dat)
|
|
{
|
|
u_int16_t *ptr = (u_int16_t *)dat;
|
|
u_int16_t val_h, val_l;
|
|
|
|
ptr++; /* skip "Reserved" */
|
|
|
|
val_h = EXTRACT_16BITS(ptr); ptr++;
|
|
val_l = EXTRACT_16BITS(ptr); ptr++;
|
|
printf("send=%08x ", (val_h<<16) + val_l);
|
|
|
|
val_h = EXTRACT_16BITS(ptr); ptr++;
|
|
val_l = EXTRACT_16BITS(ptr); ptr++;
|
|
printf("recv=%08x ", (val_h<<16) + val_l);
|
|
}
|
|
|
|
static void
|
|
l2tp_ppp_discon_cc_print(const u_char *dat, u_int length)
|
|
{
|
|
u_int16_t *ptr = (u_int16_t *)dat;
|
|
|
|
printf("%04x, ", EXTRACT_16BITS(ptr)); ptr++; /* Disconnect Code */
|
|
printf("%04x ", EXTRACT_16BITS(ptr)); ptr++; /* Control Protocol Number */
|
|
printf("%s", tok2str(l2tp_cc_direction2str,
|
|
"Direction-#%u", *((u_char *)ptr++)));
|
|
|
|
if (length > 5) {
|
|
printf(" ");
|
|
print_string((const u_char *)ptr, length-5);
|
|
}
|
|
}
|
|
|
|
static void
|
|
l2tp_avp_print(const u_char *dat, int length)
|
|
{
|
|
u_int len;
|
|
const u_int16_t *ptr = (u_int16_t *)dat;
|
|
u_int16_t attr_type;
|
|
int hidden = FALSE;
|
|
|
|
if (length <= 0) {
|
|
return;
|
|
}
|
|
|
|
printf(" ");
|
|
|
|
TCHECK(*ptr); /* Flags & Length */
|
|
len = EXTRACT_16BITS(ptr) & L2TP_AVP_HDR_LEN_MASK;
|
|
|
|
/* If it is not long enough to decode the entire AVP, we'll
|
|
abandon. */
|
|
TCHECK2(*ptr, len);
|
|
/* After this point, no need to worry about truncation */
|
|
|
|
if (EXTRACT_16BITS(ptr) & L2TP_AVP_HDR_FLAG_MANDATORY) {
|
|
printf("*");
|
|
}
|
|
if (EXTRACT_16BITS(ptr) & L2TP_AVP_HDR_FLAG_HIDDEN) {
|
|
hidden = TRUE;
|
|
printf("?");
|
|
}
|
|
ptr++;
|
|
|
|
if (EXTRACT_16BITS(ptr)) {
|
|
/* Vendor Specific Attribute */
|
|
printf("VENDOR%04x:", EXTRACT_16BITS(ptr)); ptr++;
|
|
printf("ATTR%04x", EXTRACT_16BITS(ptr)); ptr++;
|
|
printf("(");
|
|
print_octets((u_char *)ptr, len-6);
|
|
printf(")");
|
|
} else {
|
|
/* IETF-defined Attributes */
|
|
ptr++;
|
|
attr_type = EXTRACT_16BITS(ptr); ptr++;
|
|
printf("%s", tok2str(l2tp_avp2str, "AVP-#%u", attr_type));
|
|
printf("(");
|
|
if (hidden) {
|
|
printf("???");
|
|
} else {
|
|
switch (attr_type) {
|
|
case L2TP_AVP_MSGTYPE:
|
|
l2tp_msgtype_print((u_char *)ptr);
|
|
break;
|
|
case L2TP_AVP_RESULT_CODE:
|
|
l2tp_result_code_print((u_char *)ptr, len-6);
|
|
break;
|
|
case L2TP_AVP_PROTO_VER:
|
|
l2tp_proto_ver_print(ptr);
|
|
break;
|
|
case L2TP_AVP_FRAMING_CAP:
|
|
l2tp_framing_cap_print((u_char *)ptr);
|
|
break;
|
|
case L2TP_AVP_BEARER_CAP:
|
|
l2tp_bearer_cap_print((u_char *)ptr);
|
|
break;
|
|
case L2TP_AVP_TIE_BREAKER:
|
|
print_octets((u_char *)ptr, 8);
|
|
break;
|
|
case L2TP_AVP_FIRM_VER:
|
|
case L2TP_AVP_ASSND_TUN_ID:
|
|
case L2TP_AVP_RECV_WIN_SIZE:
|
|
case L2TP_AVP_ASSND_SESS_ID:
|
|
print_16bits_val(ptr);
|
|
break;
|
|
case L2TP_AVP_HOST_NAME:
|
|
case L2TP_AVP_VENDOR_NAME:
|
|
case L2TP_AVP_CALLING_NUMBER:
|
|
case L2TP_AVP_CALLED_NUMBER:
|
|
case L2TP_AVP_SUB_ADDRESS:
|
|
case L2TP_AVP_PROXY_AUTH_NAME:
|
|
case L2TP_AVP_PRIVATE_GRP_ID:
|
|
print_string((u_char *)ptr, len-6);
|
|
break;
|
|
case L2TP_AVP_CHALLENGE:
|
|
case L2TP_AVP_INI_RECV_LCP:
|
|
case L2TP_AVP_LAST_SENT_LCP:
|
|
case L2TP_AVP_LAST_RECV_LCP:
|
|
case L2TP_AVP_PROXY_AUTH_CHAL:
|
|
case L2TP_AVP_PROXY_AUTH_RESP:
|
|
case L2TP_AVP_RANDOM_VECTOR:
|
|
print_octets((u_char *)ptr, len-6);
|
|
break;
|
|
case L2TP_AVP_Q931_CC:
|
|
l2tp_q931_cc_print((u_char *)ptr, len-6);
|
|
break;
|
|
case L2TP_AVP_CHALLENGE_RESP:
|
|
print_octets((u_char *)ptr, 16);
|
|
break;
|
|
case L2TP_AVP_CALL_SER_NUM:
|
|
case L2TP_AVP_MINIMUM_BPS:
|
|
case L2TP_AVP_MAXIMUM_BPS:
|
|
case L2TP_AVP_TX_CONN_SPEED:
|
|
case L2TP_AVP_PHY_CHANNEL_ID:
|
|
case L2TP_AVP_RX_CONN_SPEED:
|
|
print_32bits_val((u_int32_t *)ptr);
|
|
break;
|
|
case L2TP_AVP_BEARER_TYPE:
|
|
l2tp_bearer_type_print((u_char *)ptr);
|
|
break;
|
|
case L2TP_AVP_FRAMING_TYPE:
|
|
l2tp_framing_type_print((u_char *)ptr);
|
|
break;
|
|
case L2TP_AVP_PACKET_PROC_DELAY:
|
|
l2tp_packet_proc_delay_print();
|
|
break;
|
|
case L2TP_AVP_PROXY_AUTH_TYPE:
|
|
l2tp_proxy_auth_type_print((u_char *)ptr);
|
|
break;
|
|
case L2TP_AVP_PROXY_AUTH_ID:
|
|
l2tp_proxy_auth_id_print((u_char *)ptr);
|
|
break;
|
|
case L2TP_AVP_CALL_ERRORS:
|
|
l2tp_call_errors_print((u_char *)ptr);
|
|
break;
|
|
case L2TP_AVP_ACCM:
|
|
l2tp_accm_print((u_char *)ptr);
|
|
break;
|
|
case L2TP_AVP_SEQ_REQUIRED:
|
|
break; /* No Attribute Value */
|
|
case L2TP_AVP_PPP_DISCON_CC:
|
|
l2tp_ppp_discon_cc_print((u_char *)ptr, len-6);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
printf(")");
|
|
}
|
|
|
|
l2tp_avp_print(dat+len, length-len);
|
|
return;
|
|
|
|
trunc:
|
|
printf("|...");
|
|
}
|
|
|
|
|
|
void
|
|
l2tp_print(const u_char *dat, u_int length)
|
|
{
|
|
const u_int16_t *ptr = (u_int16_t *)dat;
|
|
u_int cnt = 0; /* total octets consumed */
|
|
u_int16_t pad;
|
|
int flag_t, flag_l, flag_s, flag_o, flag_p;
|
|
u_int16_t l2tp_len;
|
|
|
|
flag_t = flag_l = flag_s = flag_o = flag_p = FALSE;
|
|
|
|
TCHECK(*ptr); /* Flags & Version */
|
|
if ((EXTRACT_16BITS(ptr) & L2TP_VERSION_MASK) == L2TP_VERSION_L2TP) {
|
|
printf(" l2tp:");
|
|
} else if ((EXTRACT_16BITS(ptr) & L2TP_VERSION_MASK) == L2TP_VERSION_L2F) {
|
|
printf(" l2f:");
|
|
return; /* nothing to do */
|
|
} else {
|
|
printf(" Unknown Version, neither L2F(1) nor L2TP(2)");
|
|
return; /* nothing we can do */
|
|
}
|
|
|
|
printf("[");
|
|
if (EXTRACT_16BITS(ptr) & L2TP_FLAG_TYPE) {
|
|
flag_t = TRUE;
|
|
printf("T");
|
|
}
|
|
if (EXTRACT_16BITS(ptr) & L2TP_FLAG_LENGTH) {
|
|
flag_l = TRUE;
|
|
printf("L");
|
|
}
|
|
if (EXTRACT_16BITS(ptr) & L2TP_FLAG_SEQUENCE) {
|
|
flag_s = TRUE;
|
|
printf("S");
|
|
}
|
|
if (EXTRACT_16BITS(ptr) & L2TP_FLAG_OFFSET) {
|
|
flag_o = TRUE;
|
|
printf("O");
|
|
}
|
|
if (EXTRACT_16BITS(ptr) & L2TP_FLAG_PRIORITY) {
|
|
flag_p = TRUE;
|
|
printf("P");
|
|
}
|
|
printf("]");
|
|
|
|
ptr++;
|
|
cnt += 2;
|
|
|
|
if (flag_l) {
|
|
TCHECK(*ptr); /* Length */
|
|
l2tp_len = EXTRACT_16BITS(ptr); ptr++;
|
|
cnt += 2;
|
|
} else {
|
|
l2tp_len = 0;
|
|
}
|
|
|
|
TCHECK(*ptr); /* Tunnel ID */
|
|
printf("(%u/", EXTRACT_16BITS(ptr)); ptr++;
|
|
cnt += 2;
|
|
TCHECK(*ptr); /* Session ID */
|
|
printf("%u)", EXTRACT_16BITS(ptr)); ptr++;
|
|
cnt += 2;
|
|
|
|
if (flag_s) {
|
|
TCHECK(*ptr); /* Ns */
|
|
printf("Ns=%u,", EXTRACT_16BITS(ptr)); ptr++;
|
|
cnt += 2;
|
|
TCHECK(*ptr); /* Nr */
|
|
printf("Nr=%u", EXTRACT_16BITS(ptr)); ptr++;
|
|
cnt += 2;
|
|
}
|
|
|
|
if (flag_o) {
|
|
TCHECK(*ptr); /* Offset Size */
|
|
pad = EXTRACT_16BITS(ptr); ptr++;
|
|
ptr += pad / sizeof(*ptr);
|
|
cnt += (2 + pad);
|
|
}
|
|
|
|
if (flag_t) {
|
|
if (length - cnt == 0) {
|
|
printf(" ZLB");
|
|
} else {
|
|
l2tp_avp_print((u_char *)ptr, length - cnt);
|
|
}
|
|
} else {
|
|
printf(" {");
|
|
ppp_print((u_char *)ptr, length - cnt);
|
|
printf("}");
|
|
}
|
|
|
|
return;
|
|
|
|
trunc:
|
|
printf("%s", tstr);
|
|
}
|