2001-06-25 23:59:56 +04:00
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/* $NetBSD: print-ppp.c,v 1.2 2001/06/25 20:00:00 itojun Exp $ */
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2001-06-25 23:26:28 +04:00
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/*
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* Copyright (c) 1990, 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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* Extensively modified by Motonori Shindo (mshindo@mshindo.net) for more
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* complete PPP support.
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*/
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/*
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* TODO:
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* o resolve XXX as much as possible
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* o MP support
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* o BAP support
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*/
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2001-06-25 23:59:56 +04:00
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#include <sys/cdefs.h>
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2001-06-25 23:26:28 +04:00
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#ifndef lint
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2001-06-25 23:59:56 +04:00
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#if 0
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2001-06-25 23:26:28 +04:00
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static const char rcsid[] =
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"@(#) Header: /tcpdump/master/tcpdump/print-ppp.c,v 1.61 2001/06/11 10:33:03 itojun Exp (LBL)";
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2001-06-25 23:59:56 +04:00
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#else
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__RCSID("$NetBSD: print-ppp.c,v 1.2 2001/06/25 20:00:00 itojun Exp $");
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#endif
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2001-06-25 23:26:28 +04:00
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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 <sys/param.h>
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#include <sys/time.h>
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#ifdef __bsdi__
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#include <net/slcompress.h>
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#include <net/if_ppp.h>
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#endif
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#include <netinet/in.h>
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#include <ctype.h>
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#include <netdb.h>
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#include <pcap.h>
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#include <stdio.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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#include "ppp.h"
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#include "chdlc.h"
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#include "ethertype.h"
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/*
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* The following constatns are defined by IANA. Please refer to
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* http://www.isi.edu/in-notes/iana/assignments/ppp-numbers
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* for the up-to-date information.
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*/
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/* Control Protocols (LCP/IPCP/CCP etc.) Codes */
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#define CPCODES_VEXT 0 /* Vendor-Specific (RFC2153) */
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#define CPCODES_CONF_REQ 1 /* Configure-Request */
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#define CPCODES_CONF_ACK 2 /* Configure-Ack */
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#define CPCODES_CONF_NAK 3 /* Configure-Nak */
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#define CPCODES_CONF_REJ 4 /* Configure-Reject */
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#define CPCODES_TERM_REQ 5 /* Terminate-Request */
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#define CPCODES_TERM_ACK 6 /* Terminate-Ack */
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#define CPCODES_CODE_REJ 7 /* Code-Reject */
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#define CPCODES_PROT_REJ 8 /* Protocol-Reject (LCP only) */
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#define CPCODES_ECHO_REQ 9 /* Echo-Request (LCP only) */
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#define CPCODES_ECHO_RPL 10 /* Echo-Reply (LCP only) */
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#define CPCODES_DISC_REQ 11 /* Discard-Request (LCP only) */
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#define CPCODES_ID 12 /* Identification (LCP only) */
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#define CPCODES_TIME_REM 13 /* Time-Remaining (LCP only) */
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#define CPCODES_RESET_REQ 14 /* Reset-Request (CCP only) */
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#define CPCODES_RESET_REP 15 /* Reset-Reply (CCP only) */
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#define CPCODES_MIN CPCODES_VEXT
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#define CPCODES_MAX CPCODES_RESET_REP
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static const char *cpcodes[] = {
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/*
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* Control Protocol code values (RFC1661)
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*/
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"Vend-Ext", /* (0) RFC2153 */
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"Conf-Req", /* (1) */
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"Conf-Ack", /* (2) */
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"Conf-Nak", /* (3) */
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"Conf-Rej", /* (4) */
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"Term-Req", /* (5) */
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"Term-Ack", /* (6) */
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"Code-Rej", /* (7) */
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"Prot-Rej", /* (8) */
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"Echo-Req", /* (9) */
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"Echo-Rep", /* (10) */
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"Disc-Req", /* (11) */
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"Ident", /* (12) RFC1570 */
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"Time-Rem", /* (13) RFC1570 */
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"Reset-Req", /* (14) RFC1962 */
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"Reset-Ack", /* (15) RFC1962 */
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};
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/* LCP Config Options */
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#define LCPOPT_VEXT 0
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#define LCPOPT_MRU 1
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#define LCPOPT_ACCM 2
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#define LCPOPT_AP 3
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#define LCPOPT_QP 4
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#define LCPOPT_MN 5
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#define LCPOPT_DEP6 6
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#define LCPOPT_PFC 7
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#define LCPOPT_ACFC 8
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#define LCPOPT_FCSALT 9
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#define LCPOPT_SDP 10
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#define LCPOPT_NUMMODE 11
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#define LCPOPT_DEP12 12
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#define LCPOPT_CBACK 13
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#define LCPOPT_DEP14 14
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#define LCPOPT_DEP15 15
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#define LCPOPT_DEP16 16
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#define LCPOPT_MLMRRU 17
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#define LCPOPT_MLSSNHF 18
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#define LCPOPT_MLED 19
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#define LCPOPT_PROP 20
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#define LCPOPT_DCEID 21
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#define LCPOPT_MPP 22
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#define LCPOPT_LD 23
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#define LCPOPT_LCPAOPT 24
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#define LCPOPT_COBS 25
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#define LCPOPT_PE 26
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#define LCPOPT_MLHF 27
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#define LCPOPT_I18N 28
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#define LCPOPT_SDLOS 29
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#define LCPOPT_PPPMUX 30
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#define LCPOPT_MIN LCPOPT_VEXT
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#define LCPOPT_MAX LCPOPT_PPPMUX
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static const char *lcpconfopts[] = {
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"Vend-Ext", /* (0) */
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"MRU", /* (1) */
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"ACCM", /* (2) */
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"Auth-Prot", /* (3) */
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"Qual-Prot", /* (4) */
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"Magic-Num", /* (5) */
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"deprecated(6)", /* used to be a Quality Protocol */
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"PFC", /* (7) */
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"ACFC", /* (8) */
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"FCS-Alt", /* (9) */
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"SDP", /* (10) */
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"Num-Mode", /* (11) */
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"deprecated(12)", /* used to be a Multi-Link-Procedure*/
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"Call-Back", /* (13) */
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"deprecated(14)", /* used to be a Connect-Time */
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"deprecated(15)", /* used to be a Compund-Frames */
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"deprecated(16)", /* used to be a Nominal-Data-Encap */
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"MRRU", /* (17) */
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"SSNHF", /* (18) */
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"End-Disc", /* (19) */
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"Proprietary", /* (20) */
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"DCE-Id", /* (21) */
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"MP+", /* (22) */
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"Link-Disc", /* (23) */
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"LCP-Auth-Opt", /* (24) */
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"COBS", /* (25) */
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"Prefix-elision", /* (26) */
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"Multilink-header-Form",/* (27) */
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"I18N", /* (28) */
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"SDL-over-SONET/SDH", /* (29) */
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"PPP-Muxing", /* (30) */
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};
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/* IPV6CP - to be supported */
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/* ECP - to be supported */
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/* CCP Config Options */
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#define CCPOPT_OUI 0 /* RFC1962 */
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#define CCPOPT_PRED1 1 /* RFC1962 */
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#define CCPOPT_PRED2 2 /* RFC1962 */
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#define CCPOPT_PJUMP 3 /* RFC1962 */
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/* 4-15 unassigned */
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#define CCPOPT_HPPPC 16 /* RFC1962 */
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#define CCPOPT_STACLZS 17 /* RFC1974 */
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#define CCPOPT_MPPC 18 /* RFC2118 */
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#define CCPOPT_GFZA 19 /* RFC1962 */
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#define CCPOPT_V42BIS 20 /* RFC1962 */
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#define CCPOPT_BSDCOMP 21 /* RFC1977 */
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/* 22 unassigned */
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#define CCPOPT_LZSDCP 23 /* RFC1967 */
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#define CCPOPT_MVRCA 24 /* RFC1975 */
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#define CCPOPT_DEC 25 /* RFC1976 */
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#define CCPOPT_DEFLATE 26 /* RFC1979 */
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/* 27-254 unassigned */
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#define CCPOPT_RESV 255 /* RFC1962 */
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#define CCPOPT_MIN CCPOPT_OUI
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#define CCPOPT_MAX CCPOPT_DEFLATE /* XXX: should be CCPOPT_RESV but... */
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static const char *ccpconfopts[] = {
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"OUI", /* (0) */
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"Pred-1", /* (1) */
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"Pred-2", /* (2) */
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"Puddle", /* (3) */
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"unassigned(4)", /* (4) */
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"unassigned(5)", /* (5) */
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"unassigned(6)", /* (6) */
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"unassigned(7)", /* (7) */
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"unassigned(8)", /* (8) */
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"unassigned(9)", /* (9) */
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"unassigned(10)", /* (10) */
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"unassigned(11)", /* (11) */
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"unassigned(12)", /* (12) */
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"unassigned(13)", /* (13) */
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"unassigned(14)", /* (14) */
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"unassigned(15)", /* (15) */
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"HP-PPC", /* (16) */
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"Stac-LZS", /* (17) */
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"MPPC", /* (18) */
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"Gand-FZA", /* (19) */
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"V.42bis", /* (20) */
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"BSD-Comp", /* (21) */
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"unassigned(22)", /* (22) */
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"LZS-DCP", /* (23) */
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"MVRCA", /* (24) */
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"DEC", /* (25) */
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"Deflate", /* (26) */
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};
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/* BACP Config Options */
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#define BACPOPT_FPEER 1 /* RFC2125 */
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/* SDCP - to be supported */
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/* IPCP Config Options */
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#define IPCPOPT_2ADDR 1 /* RFC1172, RFC1332 (deprecated) */
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#define IPCPOPT_IPCOMP 2 /* RFC1332 */
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#define IPCPOPT_ADDR 3 /* RFC1332 */
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#define IPCPOPT_MOBILE4 4 /* RFC2290 */
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#define IPCPOPT_PRIDNS 129 /* RFC1877 */
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#define IPCPOPT_PRINBNS 130 /* RFC1877 */
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#define IPCPOPT_SECDNS 131 /* RFC1877 */
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#define IPCPOPT_SECNBNS 132 /* RFC1877 */
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/* ATCP - to be supported */
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/* OSINLCP - to be supported */
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/* BVCP - to be supported */
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/* BCP - to be supported */
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/* IPXCP - to be supported */
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/* Auth Algorithms */
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/* 0-4 Reserved (RFC1994) */
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#define AUTHALG_CHAPMD5 5 /* RFC1994 */
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#define AUTHALG_MSCHAP1 128 /* RFC2433 */
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#define AUTHALG_MSCHAP2 129 /* RFC2795 */
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/* FCS Alternatives - to be supported */
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/* Multilink Endpoint Discriminator (RFC1717) */
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#define MEDCLASS_NULL 0 /* Null Class */
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#define MEDCLASS_LOCAL 1 /* Locally Assigned */
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#define MEDCLASS_IPV4 2 /* Internet Protocol (IPv4) */
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#define MEDCLASS_MAC 3 /* IEEE 802.1 global MAC address */
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#define MEDCLASS_MNB 4 /* PPP Magic Number Block */
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#define MEDCLASS_PSNDN 5 /* Public Switched Network Director Number */
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/* PPP LCP Callback */
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#define CALLBACK_AUTH 0 /* Location determined by user auth */
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#define CALLBACK_DSTR 1 /* Dialing string */
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#define CALLBACK_LID 2 /* Location identifier */
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#define CALLBACK_E164 3 /* E.164 number */
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#define CALLBACK_X500 4 /* X.500 distinguished name */
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#define CALLBACK_CBCP 6 /* Location is determined during CBCP nego */
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/* CHAP */
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#define CHAP_CHAL 1
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#define CHAP_RESP 2
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#define CHAP_SUCC 3
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#define CHAP_FAIL 4
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|
|
|
#define CHAP_CODEMIN CHAP_CHAL
|
|
|
|
|
#define CHAP_CODEMAX CHAP_FAIL
|
|
|
|
|
|
|
|
|
|
static const char *chapcode[] = {
|
|
|
|
|
"Chal", /* (1) */
|
|
|
|
|
"Resp", /* (2) */
|
|
|
|
|
"Succ", /* (3) */
|
|
|
|
|
"Fail", /* (4) */
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* PAP */
|
|
|
|
|
|
|
|
|
|
#define PAP_AREQ 1
|
|
|
|
|
#define PAP_AACK 2
|
|
|
|
|
#define PAP_ANAK 3
|
|
|
|
|
|
|
|
|
|
#define PAP_CODEMIN PAP_AREQ
|
|
|
|
|
#define PAP_CODEMAX PAP_ANAK
|
|
|
|
|
|
|
|
|
|
static const char *papcode[] = {
|
|
|
|
|
"Auth-Req", /* (1) */
|
|
|
|
|
"Auth-Ack", /* (2) */
|
|
|
|
|
"Auth-Nak", /* (3) */
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* BAP */
|
|
|
|
|
#define BAP_CALLREQ 1
|
|
|
|
|
#define BAP_CALLRES 2
|
|
|
|
|
#define BAP_CBREQ 3
|
|
|
|
|
#define BAP_CBRES 4
|
|
|
|
|
#define BAP_LDQREQ 5
|
|
|
|
|
#define BAP_LDQRES 6
|
|
|
|
|
#define BAP_CSIND 7
|
|
|
|
|
#define BAP_CSRES 8
|
|
|
|
|
|
|
|
|
|
static const char *ppp_protoname (u_int proto);
|
|
|
|
|
static void handle_ctrl_proto (u_int proto,const u_char *p, int length);
|
|
|
|
|
static void handle_chap (const u_char *p, int length);
|
|
|
|
|
static void handle_pap (const u_char *p, int length);
|
|
|
|
|
static void handle_bap (const u_char *p, int length);
|
|
|
|
|
static int print_lcp_config_options (const u_char *p, int);
|
|
|
|
|
static int print_ipcp_config_options (const u_char *p, int);
|
|
|
|
|
static int print_ccp_config_options (const u_char *p, int);
|
|
|
|
|
static int print_bacp_config_options (const u_char *p, int);
|
|
|
|
|
static void handle_ppp (u_int proto, const u_char *p, int length);
|
|
|
|
|
|
|
|
|
|
static const char *
|
|
|
|
|
ppp_protoname(u_int proto)
|
|
|
|
|
{
|
|
|
|
|
static char buf[20];
|
|
|
|
|
|
|
|
|
|
switch (proto) {
|
|
|
|
|
case PPP_IP: return "IP";
|
|
|
|
|
case PPP_IPV6: return "IPv6";
|
|
|
|
|
#ifdef PPP_XNS
|
|
|
|
|
case PPP_XNS: return "XNS";
|
|
|
|
|
#endif
|
|
|
|
|
case PPP_IPX: return "IPX";
|
|
|
|
|
case PPP_VJC: return "VJC";
|
|
|
|
|
case PPP_VJNC: return "VJNC";
|
|
|
|
|
case PPP_COMP: return "COMP";
|
|
|
|
|
case PPP_IPCP: return "IPCP";
|
|
|
|
|
case PPP_IPV6CP: return "IPv6CP";
|
|
|
|
|
case PPP_IPXCP: return "IPXCP";
|
|
|
|
|
case PPP_CCP: return "CCP";
|
|
|
|
|
case PPP_LCP: return "LCP";
|
|
|
|
|
case PPP_PAP: return "PAP";
|
|
|
|
|
#ifdef PPP_LQR
|
|
|
|
|
case PPP_LQR: return "LQR";
|
|
|
|
|
#endif
|
|
|
|
|
case PPP_CHAP: return "CHAP";
|
|
|
|
|
case PPP_BACP: return "BACP";
|
|
|
|
|
case PPP_BAP: return "BAP";
|
|
|
|
|
default:
|
|
|
|
|
snprintf(buf, sizeof(buf), "unknown-0x%04x", proto);
|
|
|
|
|
return buf;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* generic Control Protocol (e.g. LCP, IPCP, CCP, etc.) handler */
|
|
|
|
|
static void
|
|
|
|
|
handle_ctrl_proto(u_int proto, const u_char *p, int length)
|
|
|
|
|
{
|
|
|
|
|
u_int code, len;
|
|
|
|
|
int (*pfunc)(const u_char *, int);
|
|
|
|
|
int x, j;
|
|
|
|
|
|
|
|
|
|
if (length < 1) {
|
|
|
|
|
printf("[|%s]", ppp_protoname(proto));
|
|
|
|
|
return;
|
|
|
|
|
} else if (length < 4) {
|
|
|
|
|
printf("[|%s 0x%02x]", ppp_protoname(proto), *p);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
code = *p;
|
|
|
|
|
if ((code >= CPCODES_MIN) && (code <= CPCODES_MAX))
|
|
|
|
|
printf("%s", cpcodes[code]);
|
|
|
|
|
else {
|
|
|
|
|
printf("0x%02x", code);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
p++;
|
|
|
|
|
|
|
|
|
|
printf("(%u)", *p); /* ID */
|
|
|
|
|
p++;
|
|
|
|
|
|
|
|
|
|
len = EXTRACT_16BITS(p);
|
|
|
|
|
p += 2;
|
|
|
|
|
|
|
|
|
|
if (length <= 4)
|
|
|
|
|
return; /* there may be a NULL confreq etc. */
|
|
|
|
|
|
|
|
|
|
switch (code) {
|
|
|
|
|
case CPCODES_VEXT:
|
|
|
|
|
if (length < 11)
|
|
|
|
|
break;
|
|
|
|
|
printf(", Magic-Num=%08x", EXTRACT_32BITS(p));
|
|
|
|
|
p += 4;
|
|
|
|
|
printf(" OUI=%02x%02x%02x", p[0], p[1], p[2]);
|
|
|
|
|
/* XXX: need to decode Kind and Value(s)? */
|
|
|
|
|
break;
|
|
|
|
|
case CPCODES_CONF_REQ:
|
|
|
|
|
case CPCODES_CONF_ACK:
|
|
|
|
|
case CPCODES_CONF_NAK:
|
|
|
|
|
case CPCODES_CONF_REJ:
|
|
|
|
|
x = len - 4; /* Code(1), Identifier(1) and Length(2) */
|
|
|
|
|
do {
|
|
|
|
|
switch (proto) {
|
|
|
|
|
case PPP_LCP:
|
|
|
|
|
pfunc = print_lcp_config_options;
|
|
|
|
|
break;
|
|
|
|
|
case PPP_IPCP:
|
|
|
|
|
pfunc = print_ipcp_config_options;
|
|
|
|
|
break;
|
|
|
|
|
case PPP_CCP:
|
|
|
|
|
pfunc = print_ccp_config_options;
|
|
|
|
|
break;
|
|
|
|
|
case PPP_BACP:
|
|
|
|
|
pfunc = print_bacp_config_options;
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
/*
|
|
|
|
|
* This should never happen, but we set
|
|
|
|
|
* "pfunc" to squelch uninitialized
|
|
|
|
|
* variable warnings from compilers.
|
|
|
|
|
*/
|
|
|
|
|
pfunc = NULL;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if ((j = (*pfunc)(p, len)) == 0)
|
|
|
|
|
break;
|
|
|
|
|
x -= j;
|
|
|
|
|
p += j;
|
|
|
|
|
} while (x > 0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case CPCODES_TERM_REQ:
|
|
|
|
|
case CPCODES_TERM_ACK:
|
|
|
|
|
/* XXX: need to decode Data? */
|
|
|
|
|
break;
|
|
|
|
|
case CPCODES_CODE_REJ:
|
|
|
|
|
/* XXX: need to decode Rejected-Packet? */
|
|
|
|
|
break;
|
|
|
|
|
case CPCODES_PROT_REJ:
|
|
|
|
|
if (length < 6)
|
|
|
|
|
break;
|
|
|
|
|
printf(", Rejected-Protocol=%04x", EXTRACT_16BITS(p));
|
|
|
|
|
/* XXX: need to decode Rejected-Information? */
|
|
|
|
|
break;
|
|
|
|
|
case CPCODES_ECHO_REQ:
|
|
|
|
|
case CPCODES_ECHO_RPL:
|
|
|
|
|
case CPCODES_DISC_REQ:
|
|
|
|
|
case CPCODES_ID:
|
|
|
|
|
if (length < 8)
|
|
|
|
|
break;
|
|
|
|
|
printf(", Magic-Num=%08x", EXTRACT_32BITS(p));
|
|
|
|
|
/* XXX: need to decode Data? */
|
|
|
|
|
break;
|
|
|
|
|
case CPCODES_TIME_REM:
|
|
|
|
|
if (length < 12)
|
|
|
|
|
break;
|
|
|
|
|
printf(", Magic-Num=%08x", EXTRACT_32BITS(p));
|
|
|
|
|
printf(" Seconds-Remaining=%u", EXTRACT_32BITS(p + 4));
|
|
|
|
|
/* XXX: need to decode Message? */
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
printf(", unknown-Codes-0x%02x", code);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* LCP config options */
|
|
|
|
|
static int
|
|
|
|
|
print_lcp_config_options(const u_char *p, int length)
|
|
|
|
|
{
|
|
|
|
|
int len, opt;
|
|
|
|
|
|
|
|
|
|
if (length < 2)
|
|
|
|
|
return 0;
|
|
|
|
|
len = p[1];
|
|
|
|
|
opt = p[0];
|
|
|
|
|
if (length < len)
|
|
|
|
|
return 0;
|
|
|
|
|
if ((opt >= LCPOPT_MIN) && (opt <= LCPOPT_MAX))
|
|
|
|
|
printf(", %s", lcpconfopts[opt]);
|
|
|
|
|
else {
|
|
|
|
|
printf(", unknwhown-%d", opt);
|
|
|
|
|
return len;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
switch (opt) {
|
|
|
|
|
case LCPOPT_VEXT:
|
|
|
|
|
if (len >= 6) {
|
|
|
|
|
printf(" OUI=%02x%02x%02x", p[2], p[3], p[4]);
|
|
|
|
|
#if 0
|
|
|
|
|
printf(" kind=%02x", p[5]);
|
|
|
|
|
printf(" val=")
|
|
|
|
|
for (i = 0; i < len - 6; i++) {
|
|
|
|
|
printf("%02x", p[6 + i]);
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case LCPOPT_MRU:
|
|
|
|
|
if (len == 4)
|
|
|
|
|
printf("=%u", EXTRACT_16BITS(p + 2));
|
|
|
|
|
break;
|
|
|
|
|
case LCPOPT_ACCM:
|
|
|
|
|
if (len == 6)
|
|
|
|
|
printf("=%08x", EXTRACT_32BITS(p + 2));
|
|
|
|
|
break;
|
|
|
|
|
case LCPOPT_AP:
|
|
|
|
|
if (len >= 4) {
|
|
|
|
|
if (p[2] == 0xc0 && p[3] == 0x23)
|
|
|
|
|
printf(" PAP");
|
|
|
|
|
else if (p[2] == 0xc2 && p[3] == 0x23) {
|
|
|
|
|
printf(" CHAP/");
|
|
|
|
|
switch (p[4]) {
|
|
|
|
|
default:
|
|
|
|
|
printf("unknown-algorithm-%u", p[4]);
|
|
|
|
|
break;
|
|
|
|
|
case AUTHALG_CHAPMD5:
|
|
|
|
|
printf("MD5");
|
|
|
|
|
break;
|
|
|
|
|
case AUTHALG_MSCHAP1:
|
|
|
|
|
printf("MSCHAPv1");
|
|
|
|
|
break;
|
|
|
|
|
case AUTHALG_MSCHAP2:
|
|
|
|
|
printf("MSCHAPv2");
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
else if (p[2] == 0xc2 && p[3] == 0x27)
|
|
|
|
|
printf(" EAP");
|
|
|
|
|
else if (p[2] == 0xc0 && p[3] == 0x27)
|
|
|
|
|
printf(" SPAP");
|
|
|
|
|
else if (p[2] == 0xc1 && p[3] == 0x23)
|
|
|
|
|
printf(" Old-SPAP");
|
|
|
|
|
else
|
|
|
|
|
printf("unknown");
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case LCPOPT_QP:
|
|
|
|
|
if (len >= 4) {
|
|
|
|
|
if (p[2] == 0xc0 && p[3] == 0x25)
|
|
|
|
|
printf(" LQR");
|
|
|
|
|
else
|
|
|
|
|
printf(" unknown");
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case LCPOPT_MN:
|
|
|
|
|
if (len == 6)
|
|
|
|
|
printf("=%08x", EXTRACT_32BITS(p + 2));
|
|
|
|
|
break;
|
|
|
|
|
case LCPOPT_PFC:
|
|
|
|
|
break;
|
|
|
|
|
case LCPOPT_ACFC:
|
|
|
|
|
break;
|
|
|
|
|
case LCPOPT_LD:
|
|
|
|
|
if (len == 4)
|
|
|
|
|
printf("=%04x", EXTRACT_16BITS(p + 2));
|
|
|
|
|
break;
|
|
|
|
|
case LCPOPT_CBACK:
|
|
|
|
|
if (len < 3)
|
|
|
|
|
break;
|
|
|
|
|
switch (p[2]) { /* Operation */
|
|
|
|
|
case CALLBACK_AUTH:
|
|
|
|
|
printf(" UserAuth");
|
|
|
|
|
break;
|
|
|
|
|
case CALLBACK_DSTR:
|
|
|
|
|
printf(" DialString");
|
|
|
|
|
break;
|
|
|
|
|
case CALLBACK_LID:
|
|
|
|
|
printf(" LocalID");
|
|
|
|
|
break;
|
|
|
|
|
case CALLBACK_E164:
|
|
|
|
|
printf(" E.164");
|
|
|
|
|
break;
|
|
|
|
|
case CALLBACK_X500:
|
|
|
|
|
printf(" X.500");
|
|
|
|
|
break;
|
|
|
|
|
case CALLBACK_CBCP:
|
|
|
|
|
printf(" CBCP");
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
printf(" unknown-operation=%u", p[2]);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case LCPOPT_MLMRRU:
|
|
|
|
|
if (len == 4)
|
|
|
|
|
printf("=%u", EXTRACT_16BITS(p + 2));
|
|
|
|
|
break;
|
|
|
|
|
case LCPOPT_MLED:
|
|
|
|
|
if (len < 3)
|
|
|
|
|
break;
|
|
|
|
|
switch (p[2]) { /* class */
|
|
|
|
|
case MEDCLASS_NULL:
|
|
|
|
|
printf(" Null");
|
|
|
|
|
break;
|
|
|
|
|
case MEDCLASS_LOCAL:
|
|
|
|
|
printf(" Local"); /* XXX */
|
|
|
|
|
break;
|
|
|
|
|
case MEDCLASS_IPV4:
|
|
|
|
|
if (len != 7)
|
|
|
|
|
break;
|
|
|
|
|
printf(" IPv4=%s", ipaddr_string(p + 3));
|
|
|
|
|
break;
|
|
|
|
|
case MEDCLASS_MAC:
|
|
|
|
|
if (len != 9)
|
|
|
|
|
break;
|
|
|
|
|
printf(" MAC=%02x:%02x:%02x:%02x:%02x:%02x",
|
|
|
|
|
p[3], p[4], p[5], p[6], p[7], p[8]);
|
|
|
|
|
break;
|
|
|
|
|
case MEDCLASS_MNB:
|
|
|
|
|
printf(" Magic-Num-Block"); /* XXX */
|
|
|
|
|
break;
|
|
|
|
|
case MEDCLASS_PSNDN:
|
|
|
|
|
printf(" PSNDN"); /* XXX */
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* XXX: to be supported */
|
|
|
|
|
#if 0
|
|
|
|
|
case LCPOPT_DEP6:
|
|
|
|
|
case LCPOPT_FCSALT:
|
|
|
|
|
case LCPOPT_SDP:
|
|
|
|
|
case LCPOPT_NUMMODE:
|
|
|
|
|
case LCPOPT_DEP12:
|
|
|
|
|
case LCPOPT_DEP14:
|
|
|
|
|
case LCPOPT_DEP15:
|
|
|
|
|
case LCPOPT_DEP16:
|
|
|
|
|
case LCPOPT_MLSSNHF:
|
|
|
|
|
case LCPOPT_PROP:
|
|
|
|
|
case LCPOPT_DCEID:
|
|
|
|
|
case LCPOPT_MPP:
|
|
|
|
|
case LCPOPT_LCPAOPT:
|
|
|
|
|
case LCPOPT_COBS:
|
|
|
|
|
case LCPOPT_PE:
|
|
|
|
|
case LCPOPT_MLHF:
|
|
|
|
|
case LCPOPT_I18N:
|
|
|
|
|
case LCPOPT_SDLOS:
|
|
|
|
|
case LCPOPT_PPPMUX:
|
|
|
|
|
break;
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
return len;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* CHAP */
|
|
|
|
|
static void
|
|
|
|
|
handle_chap(const u_char *p, int length)
|
|
|
|
|
{
|
|
|
|
|
u_int code, len;
|
|
|
|
|
int val_size, name_size, msg_size;
|
|
|
|
|
const u_char *p0;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
p0 = p;
|
|
|
|
|
if (length < 1) {
|
|
|
|
|
printf("[|chap]");
|
|
|
|
|
return;
|
|
|
|
|
} else if (length < 4) {
|
|
|
|
|
printf("[|chap 0x%02x]", *p);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
code = *p;
|
|
|
|
|
if ((code >= CHAP_CODEMIN) && (code <= CHAP_CODEMAX))
|
|
|
|
|
printf("%s", chapcode[code - 1]);
|
|
|
|
|
else {
|
|
|
|
|
printf("0x%02x", code);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
p++;
|
|
|
|
|
|
|
|
|
|
printf("(%u)", *p); /* ID */
|
|
|
|
|
p++;
|
|
|
|
|
|
|
|
|
|
len = EXTRACT_16BITS(p);
|
|
|
|
|
p += 2;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Note that this is a generic CHAP decoding routine. Since we
|
|
|
|
|
* don't know which flavor of CHAP (i.e. CHAP-MD5, MS-CHAPv1,
|
|
|
|
|
* MS-CHAPv2) is used at this point, we can't decode packet
|
|
|
|
|
* specifically to each algorithms. Instead, we simply decode
|
|
|
|
|
* the GCD (Gratest Common Denominator) for all algorithms.
|
|
|
|
|
*/
|
|
|
|
|
switch (code) {
|
|
|
|
|
case CHAP_CHAL:
|
|
|
|
|
case CHAP_RESP:
|
|
|
|
|
if (length - (p - p0) < 1)
|
|
|
|
|
return;
|
|
|
|
|
val_size = *p; /* value size */
|
|
|
|
|
p++;
|
|
|
|
|
if (length - (p - p0) < val_size)
|
|
|
|
|
return;
|
|
|
|
|
printf(", Value=");
|
|
|
|
|
for (i = 0; i < val_size; i++)
|
|
|
|
|
printf("%02x", *p++);
|
|
|
|
|
name_size = len - (p - p0);
|
|
|
|
|
printf(", Name=");
|
|
|
|
|
for (i = 0; i < name_size; i++)
|
|
|
|
|
safeputchar(*p++);
|
|
|
|
|
break;
|
|
|
|
|
case CHAP_SUCC:
|
|
|
|
|
case CHAP_FAIL:
|
|
|
|
|
msg_size = len - (p - p0);
|
|
|
|
|
printf(", Msg=");
|
|
|
|
|
for (i = 0; i< msg_size; i++)
|
|
|
|
|
safeputchar(*p++);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* PAP (see RFC 1334) */
|
|
|
|
|
static void
|
|
|
|
|
handle_pap(const u_char *p, int length)
|
|
|
|
|
{
|
|
|
|
|
u_int code, len;
|
|
|
|
|
int peerid_len, passwd_len, msg_len;
|
|
|
|
|
const u_char *p0;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
p0 = p;
|
|
|
|
|
if (length < 1) {
|
|
|
|
|
printf("[|pap]");
|
|
|
|
|
return;
|
|
|
|
|
} else if (length < 4) {
|
|
|
|
|
printf("[|pap 0x%02x]", *p);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
code = *p;
|
|
|
|
|
if ((code >= PAP_CODEMIN) && (code <= PAP_CODEMAX))
|
|
|
|
|
printf("%s", papcode[code - 1]);
|
|
|
|
|
else {
|
|
|
|
|
printf("0x%02x", code);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
p++;
|
|
|
|
|
|
|
|
|
|
printf("(%u)", *p); /* ID */
|
|
|
|
|
p++;
|
|
|
|
|
|
|
|
|
|
len = EXTRACT_16BITS(p);
|
|
|
|
|
p += 2;
|
|
|
|
|
|
|
|
|
|
switch (code) {
|
|
|
|
|
case PAP_AREQ:
|
|
|
|
|
if (length - (p - p0) < 1)
|
|
|
|
|
return;
|
|
|
|
|
peerid_len = *p; /* Peer-ID Length */
|
|
|
|
|
p++;
|
|
|
|
|
if (length - (p - p0) < peerid_len)
|
|
|
|
|
return;
|
|
|
|
|
printf(", Peer=");
|
|
|
|
|
for (i = 0; i < peerid_len; i++)
|
|
|
|
|
safeputchar(*p++);
|
|
|
|
|
|
|
|
|
|
if (length - (p - p0) < 1)
|
|
|
|
|
return;
|
|
|
|
|
passwd_len = *p; /* Password Length */
|
|
|
|
|
p++;
|
|
|
|
|
if (length - (p - p0) < passwd_len)
|
|
|
|
|
return;
|
|
|
|
|
printf(", Name=");
|
|
|
|
|
for (i = 0; i < passwd_len; i++)
|
|
|
|
|
safeputchar(*p++);
|
|
|
|
|
break;
|
|
|
|
|
case PAP_AACK:
|
|
|
|
|
case PAP_ANAK:
|
|
|
|
|
if (length - (p - p0) < 1)
|
|
|
|
|
return;
|
|
|
|
|
msg_len = *p; /* Msg-Length */
|
|
|
|
|
p++;
|
|
|
|
|
if (length - (p - p0) < msg_len)
|
|
|
|
|
return;
|
|
|
|
|
printf(", Msg=");
|
|
|
|
|
for (i = 0; i< msg_len; i++)
|
|
|
|
|
safeputchar(*p++);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* BAP */
|
|
|
|
|
static void
|
|
|
|
|
handle_bap(const u_char *p, int length)
|
|
|
|
|
{
|
|
|
|
|
/* XXX: to be supported!! */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* IPCP config options */
|
|
|
|
|
static int
|
|
|
|
|
print_ipcp_config_options(const u_char *p, int length)
|
|
|
|
|
{
|
|
|
|
|
int len, opt;
|
|
|
|
|
|
|
|
|
|
if (length < 2)
|
|
|
|
|
return 0;
|
|
|
|
|
len = p[1];
|
|
|
|
|
opt = p[0];
|
|
|
|
|
if (length < len)
|
|
|
|
|
return 0;
|
|
|
|
|
switch (opt) {
|
|
|
|
|
case IPCPOPT_2ADDR: /* deprecated */
|
|
|
|
|
if (len != 10)
|
|
|
|
|
goto invlen;
|
|
|
|
|
printf(", IP-Addrs src=%s dst=%s",
|
|
|
|
|
ipaddr_string(p + 2),
|
|
|
|
|
ipaddr_string(p + 6));
|
|
|
|
|
break;
|
|
|
|
|
case IPCPOPT_IPCOMP:
|
|
|
|
|
if (len < 4)
|
|
|
|
|
goto invlen;
|
|
|
|
|
printf(", IP-Comp");
|
|
|
|
|
if (EXTRACT_16BITS(p + 2) == PPP_VJC) {
|
|
|
|
|
printf(" VJ-Comp");
|
|
|
|
|
/* XXX: VJ-Comp parameters should be decoded */
|
|
|
|
|
} else
|
|
|
|
|
printf(" unknown-comp-proto=%04x", EXTRACT_16BITS(p + 2));
|
|
|
|
|
break;
|
|
|
|
|
case IPCPOPT_ADDR:
|
|
|
|
|
if (len != 6)
|
|
|
|
|
goto invlen;
|
|
|
|
|
printf(", IP-Addr=%s", ipaddr_string(p + 2));
|
|
|
|
|
break;
|
|
|
|
|
case IPCPOPT_MOBILE4:
|
|
|
|
|
if (len != 6)
|
|
|
|
|
goto invlen;
|
|
|
|
|
printf(", Home-Addr=%s", ipaddr_string(p + 2));
|
|
|
|
|
break;
|
|
|
|
|
case IPCPOPT_PRIDNS:
|
|
|
|
|
if (len != 6)
|
|
|
|
|
goto invlen;
|
|
|
|
|
printf(", Pri-DNS=%s", ipaddr_string(p + 2));
|
|
|
|
|
break;
|
|
|
|
|
case IPCPOPT_PRINBNS:
|
|
|
|
|
if (len != 6)
|
|
|
|
|
goto invlen;
|
|
|
|
|
printf(", Pri-NBNS=%s", ipaddr_string(p + 2));
|
|
|
|
|
break;
|
|
|
|
|
case IPCPOPT_SECDNS:
|
|
|
|
|
if (len != 6)
|
|
|
|
|
goto invlen;
|
|
|
|
|
printf(", Sec-DNS=%s", ipaddr_string(p + 2));
|
|
|
|
|
break;
|
|
|
|
|
case IPCPOPT_SECNBNS:
|
|
|
|
|
if (len != 6)
|
|
|
|
|
goto invlen;
|
|
|
|
|
printf(", Sec-NBNS=%s", ipaddr_string(p + 2));
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
printf(", unknown-%d", opt);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
return len;
|
|
|
|
|
|
|
|
|
|
invlen:
|
|
|
|
|
printf(", invalid-length-%d", opt);
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* CCP config options */
|
|
|
|
|
static int
|
|
|
|
|
print_ccp_config_options(const u_char *p, int length)
|
|
|
|
|
{
|
|
|
|
|
int len, opt;
|
|
|
|
|
|
|
|
|
|
if (length < 2)
|
|
|
|
|
return 0;
|
|
|
|
|
len = p[1];
|
|
|
|
|
opt = p[0];
|
|
|
|
|
if (length < len)
|
|
|
|
|
return 0;
|
|
|
|
|
if ((opt >= CCPOPT_MIN) && (opt <= CCPOPT_MAX))
|
|
|
|
|
printf(", %s", ccpconfopts[opt]);
|
|
|
|
|
#if 0 /* XXX */
|
|
|
|
|
switch (opt) {
|
|
|
|
|
case CCPOPT_OUI:
|
|
|
|
|
case CCPOPT_PRED1:
|
|
|
|
|
case CCPOPT_PRED2:
|
|
|
|
|
case CCPOPT_PJUMP:
|
|
|
|
|
case CCPOPT_HPPPC:
|
|
|
|
|
case CCPOPT_STACLZS:
|
|
|
|
|
case CCPOPT_MPPC:
|
|
|
|
|
case CCPOPT_GFZA:
|
|
|
|
|
case CCPOPT_V42BIS:
|
|
|
|
|
case CCPOPT_BSDCOMP:
|
|
|
|
|
case CCPOPT_LZSDCP:
|
|
|
|
|
case CCPOPT_MVRCA:
|
|
|
|
|
case CCPOPT_DEC:
|
|
|
|
|
case CCPOPT_DEFLATE:
|
|
|
|
|
case CCPOPT_RESV:
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
printf(", unknown-%d", opt);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
return len;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* BACP config options */
|
|
|
|
|
static int
|
|
|
|
|
print_bacp_config_options(const u_char *p, int length)
|
|
|
|
|
{
|
|
|
|
|
int len, opt;
|
|
|
|
|
|
|
|
|
|
if (length < 2)
|
|
|
|
|
return 0;
|
|
|
|
|
len = p[1];
|
|
|
|
|
opt = p[0];
|
|
|
|
|
if (length < len)
|
|
|
|
|
return 0;
|
|
|
|
|
if (opt == BACPOPT_FPEER) {
|
|
|
|
|
printf(", Favored-Peer");
|
|
|
|
|
printf(" Magic-Num=%08x", EXTRACT_32BITS(p + 2));
|
|
|
|
|
} else {
|
|
|
|
|
printf(", unknown-option-%d", opt);
|
|
|
|
|
}
|
|
|
|
|
return len;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* PPP */
|
|
|
|
|
static void
|
|
|
|
|
handle_ppp(u_int proto, const u_char *p, int length)
|
|
|
|
|
{
|
|
|
|
|
switch (proto) {
|
|
|
|
|
case PPP_LCP:
|
|
|
|
|
case PPP_IPCP:
|
|
|
|
|
case PPP_CCP:
|
|
|
|
|
case PPP_BACP:
|
|
|
|
|
handle_ctrl_proto(proto, p, length);
|
|
|
|
|
break;
|
|
|
|
|
case PPP_CHAP:
|
|
|
|
|
handle_chap(p, length);
|
|
|
|
|
break;
|
|
|
|
|
case PPP_PAP:
|
|
|
|
|
handle_pap(p, length);
|
|
|
|
|
break;
|
|
|
|
|
case PPP_BAP: /* XXX: not yet completed */
|
|
|
|
|
handle_bap(p, length);
|
|
|
|
|
break;
|
|
|
|
|
case ETHERTYPE_IP: /*XXX*/
|
|
|
|
|
case PPP_IP:
|
|
|
|
|
ip_print(p, length);
|
|
|
|
|
break;
|
|
|
|
|
#ifdef INET6
|
|
|
|
|
case ETHERTYPE_IPV6: /*XXX*/
|
|
|
|
|
case PPP_IPV6:
|
|
|
|
|
ip6_print(p, length);
|
|
|
|
|
break;
|
|
|
|
|
#endif
|
|
|
|
|
case ETHERTYPE_IPX: /*XXX*/
|
|
|
|
|
case PPP_IPX:
|
|
|
|
|
ipx_print(p, length);
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Standard PPP printer */
|
|
|
|
|
void
|
|
|
|
|
ppp_print(register const u_char *p, u_int length)
|
|
|
|
|
{
|
|
|
|
|
u_int proto;
|
|
|
|
|
u_int full_length = length;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Here, we assume that p points to the Address and Control
|
|
|
|
|
* field (if they present).
|
|
|
|
|
*/
|
|
|
|
|
if (length < 2)
|
|
|
|
|
goto trunc;
|
|
|
|
|
if (*p == PPP_ADDRESS && *(p + 1) == PPP_CONTROL) {
|
|
|
|
|
p += 2; /* ACFC not used */
|
|
|
|
|
length -= 2;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (length < 2)
|
|
|
|
|
goto trunc;
|
|
|
|
|
if (*p % 2) {
|
|
|
|
|
proto = *p; /* PFC is used */
|
|
|
|
|
p++;
|
|
|
|
|
length--;
|
|
|
|
|
} else {
|
|
|
|
|
proto = EXTRACT_16BITS(p);
|
|
|
|
|
p += 2;
|
|
|
|
|
length -= 2;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (eflag)
|
|
|
|
|
printf("%s %d: ", ppp_protoname(proto), full_length);
|
|
|
|
|
|
|
|
|
|
handle_ppp(proto, p, length);
|
|
|
|
|
return;
|
|
|
|
|
trunc:
|
|
|
|
|
printf("[|ppp]");
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* PPP I/F printer */
|
|
|
|
|
void
|
|
|
|
|
ppp_if_print(u_char *user, const struct pcap_pkthdr *h,
|
|
|
|
|
register const u_char *p)
|
|
|
|
|
{
|
|
|
|
|
register u_int length = h->len;
|
|
|
|
|
register u_int caplen = h->caplen;
|
|
|
|
|
|
|
|
|
|
ts_print(&h->ts);
|
|
|
|
|
|
|
|
|
|
if (caplen < PPP_HDRLEN) {
|
|
|
|
|
printf("[|ppp]");
|
|
|
|
|
goto out;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Some printers want to get back at the link level addresses,
|
|
|
|
|
* and/or check that they're not walking off the end of the packet.
|
|
|
|
|
* Rather than pass them all the way down, we set these globals. */
|
|
|
|
|
|
|
|
|
|
packetp = p;
|
|
|
|
|
snapend = p + caplen;
|
|
|
|
|
|
|
|
|
|
#if 0
|
|
|
|
|
/*
|
|
|
|
|
* XXX: seems to assume that there are 2 octets prepended to an
|
|
|
|
|
* actual PPP frame. The 1st octet looks like Input/Output flag
|
|
|
|
|
* while 2nd octet is unknown, at least to me
|
|
|
|
|
* (mshindo@mshindo.net).
|
|
|
|
|
*
|
|
|
|
|
* That was what the original tcpdump code did.
|
|
|
|
|
*
|
|
|
|
|
* FreeBSD's "if_ppp.c" *does* set the first octet to 1 for outbound
|
|
|
|
|
* packets and 0 for inbound packets - but only if the
|
|
|
|
|
* protocol field has the 0x8000 bit set (i.e., it's a network
|
|
|
|
|
* control protocol); it does so before running the packet through
|
|
|
|
|
* "bpf_filter" to see if it should be discarded, and to see
|
|
|
|
|
* if we should update the time we sent the most recent packet...
|
|
|
|
|
*
|
|
|
|
|
* ...but it puts the original address field back after doing
|
|
|
|
|
* so.
|
|
|
|
|
*
|
|
|
|
|
* NetBSD's "if_ppp.c" doesn't set the first octet in that fashion.
|
|
|
|
|
*
|
|
|
|
|
* I don't know if any PPP implementation handed up to a BPF
|
|
|
|
|
* device packets with the first octet being 1 for outbound and
|
|
|
|
|
* 0 for inbound packets, so I (guy@alum.mit.edu) don't know
|
|
|
|
|
* whether that ever needs to be checked or not.
|
|
|
|
|
*
|
|
|
|
|
* Note that NetBSD has a DLT_PPP_SERIAL, which it uses for PPP,
|
|
|
|
|
* and its tcpdump appears to assume that the frame always
|
|
|
|
|
* begins with an address field and a control field, and that
|
|
|
|
|
* the address field might be 0x0f or 0x8f, for Cisco
|
|
|
|
|
* point-to-point with HDLC framing as per section 4.3.1 of RFC
|
|
|
|
|
* 1547, as well as 0xff, for PPP in HDLC-like framing as per
|
|
|
|
|
* RFC 1662.
|
|
|
|
|
*
|
|
|
|
|
* (Is the Cisco framing in question what DLT_C_HDLC, in
|
|
|
|
|
* BSD/OS, is?)
|
|
|
|
|
*/
|
|
|
|
|
if (eflag)
|
|
|
|
|
printf("%c %4d %02x ", p[0] ? 'O' : 'I', length, p[1]);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
ppp_print(p, length);
|
|
|
|
|
|
|
|
|
|
if (xflag)
|
|
|
|
|
default_print(p, caplen);
|
|
|
|
|
out:
|
|
|
|
|
putchar('\n');
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* PPP I/F printer to use if we know that RFC 1662-style PPP in HDLC-like
|
|
|
|
|
* framing, or Cisco PPP with HDLC framing as per section 4.3.1 of RFC 1547,
|
|
|
|
|
* is being used (i.e., we don't check for PPP_ADDRESS and PPP_CONTROL,
|
|
|
|
|
* discard them *if* those are the first two octets, and parse the remaining
|
|
|
|
|
* packet as a PPP packet, as "ppp_print()" does).
|
|
|
|
|
*
|
|
|
|
|
* This handles, for example, DLT_PPP_SERIAL in NetBSD.
|
|
|
|
|
*/
|
|
|
|
|
void
|
|
|
|
|
ppp_hdlc_if_print(u_char *user, const struct pcap_pkthdr *h,
|
|
|
|
|
register const u_char *p)
|
|
|
|
|
{
|
|
|
|
|
register u_int length = h->len;
|
|
|
|
|
register u_int caplen = h->caplen;
|
|
|
|
|
u_int proto;
|
|
|
|
|
|
|
|
|
|
if (caplen < 2) {
|
|
|
|
|
printf("[|ppp]");
|
|
|
|
|
goto out;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Some printers want to get back at the link level addresses,
|
|
|
|
|
* and/or check that they're not walking off the end of the packet.
|
|
|
|
|
* Rather than pass them all the way down, we set these globals.
|
|
|
|
|
*/
|
|
|
|
|
packetp = p;
|
|
|
|
|
snapend = p + caplen;
|
|
|
|
|
|
|
|
|
|
switch (p[0]) {
|
|
|
|
|
|
|
|
|
|
case PPP_ADDRESS:
|
|
|
|
|
if (caplen < 4) {
|
|
|
|
|
printf("[|ppp]");
|
|
|
|
|
goto out;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ts_print(&h->ts);
|
|
|
|
|
if (eflag)
|
|
|
|
|
printf("%02x %02x %d ", p[0], p[1], length);
|
|
|
|
|
p += 2;
|
|
|
|
|
length -= 2;
|
|
|
|
|
|
|
|
|
|
proto = EXTRACT_16BITS(p);
|
|
|
|
|
p += 2;
|
|
|
|
|
length -= 2;
|
|
|
|
|
if (eflag)
|
|
|
|
|
printf("%s: ", ppp_protoname(proto));
|
|
|
|
|
|
|
|
|
|
handle_ppp(proto, p, length);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case CHDLC_UNICAST:
|
|
|
|
|
case CHDLC_BCAST:
|
|
|
|
|
/*
|
|
|
|
|
* Have the Cisco HDLC print routine do all the work.
|
|
|
|
|
*/
|
|
|
|
|
chdlc_if_print(user, h, p);
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
ts_print(&h->ts);
|
|
|
|
|
if (eflag)
|
|
|
|
|
printf("%02x %02x %d ", p[0], p[1], length);
|
|
|
|
|
p += 2;
|
|
|
|
|
length -= 2;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* XXX - NetBSD's "ppp_netbsd_serial_if_print()" treats
|
|
|
|
|
* the next two octets as an Ethernet type; does that
|
|
|
|
|
* ever happen?
|
|
|
|
|
*/
|
|
|
|
|
printf("unknown addr %02x; ctrl %02x", p[0], p[1]);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (xflag)
|
|
|
|
|
default_print(p, caplen);
|
|
|
|
|
out:
|
|
|
|
|
putchar('\n');
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
struct tok ppptype2str[] = {
|
|
|
|
|
{ PPP_IP, "IP" },
|
|
|
|
|
{ PPP_OSI, "OSI" },
|
|
|
|
|
{ PPP_NS, "NS" },
|
|
|
|
|
{ PPP_DECNET, "DECNET" },
|
|
|
|
|
{ PPP_APPLE, "APPLE" },
|
|
|
|
|
{ PPP_IPX, "IPX" },
|
|
|
|
|
{ PPP_VJC, "VJC" },
|
|
|
|
|
{ PPP_VJNC, "VJNC" },
|
|
|
|
|
{ PPP_BRPDU, "BRPDU" },
|
|
|
|
|
{ PPP_STII, "STII" },
|
|
|
|
|
{ PPP_VINES, "VINES" },
|
|
|
|
|
|
|
|
|
|
{ PPP_HELLO, "HELLO" },
|
|
|
|
|
{ PPP_LUXCOM, "LUXCOM" },
|
|
|
|
|
{ PPP_SNS, "SNS" },
|
|
|
|
|
{ PPP_IPCP, "IPCP" },
|
|
|
|
|
{ PPP_OSICP, "OSICP" },
|
|
|
|
|
{ PPP_NSCP, "NSCP" },
|
|
|
|
|
{ PPP_DECNETCP, "DECNETCP" },
|
|
|
|
|
{ PPP_APPLECP, "APPLECP" },
|
|
|
|
|
{ PPP_IPXCP, "IPXCP" },
|
|
|
|
|
{ PPP_STIICP, "STIICP" },
|
|
|
|
|
{ PPP_VINESCP, "VINESCP" },
|
|
|
|
|
|
|
|
|
|
{ PPP_LCP, "LCP" },
|
|
|
|
|
{ PPP_PAP, "PAP" },
|
|
|
|
|
{ PPP_LQM, "LQM" },
|
|
|
|
|
{ PPP_CHAP, "CHAP" },
|
|
|
|
|
{ PPP_BACP, "BACP" },
|
|
|
|
|
{ PPP_BAP, "BAP" },
|
|
|
|
|
{ PPP_MP, "MP" },
|
|
|
|
|
{ 0, NULL }
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
#define PPP_BSDI_HDRLEN 24
|
|
|
|
|
|
|
|
|
|
/* BSD/OS specific PPP printer */
|
|
|
|
|
void
|
|
|
|
|
ppp_bsdos_if_print(u_char *user, const struct pcap_pkthdr *h,
|
|
|
|
|
register const u_char *p)
|
|
|
|
|
{
|
|
|
|
|
#ifdef __bsdi__
|
|
|
|
|
register u_int length = h->len;
|
|
|
|
|
register u_int caplen = h->caplen;
|
|
|
|
|
register int hdrlength;
|
|
|
|
|
u_int16_t ptype;
|
|
|
|
|
const u_char *q;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
ts_print(&h->ts);
|
|
|
|
|
|
|
|
|
|
if (caplen < PPP_BSDI_HDRLEN) {
|
|
|
|
|
printf("[|ppp]");
|
|
|
|
|
goto out;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Some printers want to get back at the link level addresses,
|
|
|
|
|
* and/or check that they're not walking off the end of the packet.
|
|
|
|
|
* Rather than pass them all the way down, we set these globals.
|
|
|
|
|
*/
|
|
|
|
|
packetp = p;
|
|
|
|
|
snapend = p + caplen;
|
|
|
|
|
hdrlength = 0;
|
|
|
|
|
|
|
|
|
|
#if 0
|
|
|
|
|
if (p[0] == PPP_ADDRESS && p[1] == PPP_CONTROL) {
|
|
|
|
|
if (eflag)
|
|
|
|
|
printf("%02x %02x ", p[0], p[1]);
|
|
|
|
|
p += 2;
|
|
|
|
|
hdrlength = 2;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (eflag)
|
|
|
|
|
printf("%d ", length);
|
|
|
|
|
/* Retrieve the protocol type */
|
|
|
|
|
if (*p & 01) {
|
|
|
|
|
/* Compressed protocol field */
|
|
|
|
|
ptype = *p;
|
|
|
|
|
if (eflag)
|
|
|
|
|
printf("%02x ", ptype);
|
|
|
|
|
p++;
|
|
|
|
|
hdrlength += 1;
|
|
|
|
|
} else {
|
|
|
|
|
/* Un-compressed protocol field */
|
|
|
|
|
ptype = ntohs(*(u_int16_t *)p);
|
|
|
|
|
if (eflag)
|
|
|
|
|
printf("%04x ", ptype);
|
|
|
|
|
p += 2;
|
|
|
|
|
hdrlength += 2;
|
|
|
|
|
}
|
|
|
|
|
#else
|
|
|
|
|
ptype = 0; /*XXX*/
|
|
|
|
|
if (eflag)
|
|
|
|
|
printf("%c ", p[SLC_DIR] ? 'O' : 'I');
|
|
|
|
|
if (p[SLC_LLHL]) {
|
|
|
|
|
/* link level header */
|
|
|
|
|
struct ppp_header *ph;
|
|
|
|
|
|
|
|
|
|
q = p + SLC_BPFHDRLEN;
|
|
|
|
|
ph = (struct ppp_header *)q;
|
|
|
|
|
if (ph->phdr_addr == PPP_ADDRESS
|
|
|
|
|
&& ph->phdr_ctl == PPP_CONTROL) {
|
|
|
|
|
if (eflag)
|
|
|
|
|
printf("%02x %02x ", q[0], q[1]);
|
|
|
|
|
ptype = ntohs(ph->phdr_type);
|
|
|
|
|
if (eflag && (ptype == PPP_VJC || ptype == PPP_VJNC)) {
|
|
|
|
|
printf("%s ", tok2str(ppptype2str,
|
|
|
|
|
"proto-#%d", ptype));
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
if (eflag) {
|
|
|
|
|
printf("LLH=[");
|
|
|
|
|
for (i = 0; i < p[SLC_LLHL]; i++)
|
|
|
|
|
printf("%02x", q[i]);
|
|
|
|
|
printf("] ");
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
if (eflag)
|
|
|
|
|
printf("%d ", length);
|
|
|
|
|
if (p[SLC_CHL]) {
|
|
|
|
|
q = p + SLC_BPFHDRLEN + p[SLC_LLHL];
|
|
|
|
|
|
|
|
|
|
switch (ptype) {
|
|
|
|
|
case PPP_VJC:
|
|
|
|
|
ptype = vjc_print(q, length - (q - p), ptype);
|
|
|
|
|
hdrlength = PPP_BSDI_HDRLEN;
|
|
|
|
|
p += hdrlength;
|
|
|
|
|
switch (ptype) {
|
|
|
|
|
case PPP_IP:
|
|
|
|
|
ip_print(p, length);
|
|
|
|
|
break;
|
|
|
|
|
#ifdef INET6
|
|
|
|
|
case PPP_IPV6:
|
|
|
|
|
ip6_print(p, length);
|
|
|
|
|
break;
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
goto printx;
|
|
|
|
|
case PPP_VJNC:
|
|
|
|
|
ptype = vjc_print(q, length - (q - p), ptype);
|
|
|
|
|
hdrlength = PPP_BSDI_HDRLEN;
|
|
|
|
|
p += hdrlength;
|
|
|
|
|
switch (ptype) {
|
|
|
|
|
case PPP_IP:
|
|
|
|
|
ip_print(p, length);
|
|
|
|
|
break;
|
|
|
|
|
#ifdef INET6
|
|
|
|
|
case PPP_IPV6:
|
|
|
|
|
ip6_print(p, length);
|
|
|
|
|
break;
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
goto printx;
|
|
|
|
|
default:
|
|
|
|
|
if (eflag) {
|
|
|
|
|
printf("CH=[");
|
|
|
|
|
for (i = 0; i < p[SLC_LLHL]; i++)
|
|
|
|
|
printf("%02x", q[i]);
|
|
|
|
|
printf("] ");
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
hdrlength = PPP_BSDI_HDRLEN;
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
length -= hdrlength;
|
|
|
|
|
p += hdrlength;
|
|
|
|
|
|
|
|
|
|
switch (ptype) {
|
|
|
|
|
case PPP_IP:
|
|
|
|
|
ip_print(p, length);
|
|
|
|
|
break;
|
|
|
|
|
#ifdef INET6
|
|
|
|
|
case PPP_IPV6:
|
|
|
|
|
ip6_print(p, length);
|
|
|
|
|
break;
|
|
|
|
|
#endif
|
|
|
|
|
default:
|
|
|
|
|
printf("%s ", tok2str(ppptype2str, "proto-#%d", ptype));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
printx:
|
|
|
|
|
if (xflag)
|
|
|
|
|
default_print((const u_char *)p, caplen - hdrlength);
|
|
|
|
|
out:
|
|
|
|
|
putchar('\n');
|
|
|
|
|
#endif /* __bsdi__ */
|
|
|
|
|
}
|
