print-mobility.c - platform/external/tcpdump - Git at Google

 /*
  * Copyright (C) 2002 WIDE Project.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. Neither the name of the project nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */

 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif

 #ifndef lint
 static const char rcsid[] _U_ =
      "@(#) $Header: /tcpdump/master/tcpdump/print-mobility.c,v 1.12 2005-04-20 22:21:00 guy Exp $";
 #endif

 #ifdef INET6
 #include <tcpdump-stdinc.h>

 #include <stdio.h>

 #include "ip6.h"

 #include "interface.h"
 #include "addrtoname.h"
 #include "extract.h"		/* must come after interface.h */

 /* Mobility header */
 struct ip6_mobility {
 	u_int8_t ip6m_pproto;	/* following payload protocol (for PG) */
 	u_int8_t ip6m_len;	/* length in units of 8 octets */
 	u_int8_t ip6m_type;	/* message type */
 	u_int8_t reserved;	/* reserved */
 	u_int16_t ip6m_cksum;	/* sum of IPv6 pseudo-header and MH */
 	union {
 		u_int16_t	ip6m_un_data16[1]; /* type-specific field */
 		u_int8_t	ip6m_un_data8[2];  /* type-specific fiedl */
 	} ip6m_dataun;
 };

 #define ip6m_data16	ip6m_dataun.ip6m_un_data16
 #define ip6m_data8	ip6m_dataun.ip6m_un_data8

 #define IP6M_MINLEN	8

 /* message type */
 #define IP6M_BINDING_REQUEST	0	/* Binding Refresh Request */
 #define IP6M_HOME_TEST_INIT	1	/* Home Test Init */
 #define IP6M_CAREOF_TEST_INIT	2	/* Care-of Test Init */
 #define IP6M_HOME_TEST		3	/* Home Test */
 #define IP6M_CAREOF_TEST	4	/* Care-of Test */
 #define IP6M_BINDING_UPDATE	5	/* Binding Update */
 #define IP6M_BINDING_ACK	6	/* Binding Acknowledgement */
 #define IP6M_BINDING_ERROR	7	/* Binding Error */

 /* Mobility Header Options */
 #define IP6MOPT_MINLEN		2
 #define IP6MOPT_PAD1          0x0	/* Pad1 */
 #define IP6MOPT_PADN          0x1	/* PadN */
 #define IP6MOPT_REFRESH	      0x2	/* Binding Refresh Advice */
 #define IP6MOPT_REFRESH_MINLEN  4
 #define IP6MOPT_ALTCOA        0x3	/* Alternate Care-of Address */
 #define IP6MOPT_ALTCOA_MINLEN  18
 #define IP6MOPT_NONCEID       0x4	/* Nonce Indices */
 #define IP6MOPT_NONCEID_MINLEN  6
 #define IP6MOPT_AUTH          0x5	/* Binding Authorization Data */
 #define IP6MOPT_AUTH_MINLEN    12

 static void
 mobility_opt_print(const u_char *bp, int len)
 {
 	int i;
 	int optlen;

 	for (i = 0; i < len; i += optlen) {
 		if (bp[i] == IP6MOPT_PAD1)
 			optlen = 1;
 		else {
 			if (i + 1 < len)
 				optlen = bp[i + 1] + 2;
 			else
 				goto trunc;
 		}
 		if (i + optlen > len)
 			goto trunc;

 		switch (bp[i]) {
 		case IP6MOPT_PAD1:
 			printf("(pad1)");
 			break;
 		case IP6MOPT_PADN:
 			if (len - i < IP6MOPT_MINLEN) {
 				printf("(padn: trunc)");
 				goto trunc;
 			}
 			printf("(padn)");
 			break;
 		case IP6MOPT_REFRESH:
 			if (len - i < IP6MOPT_REFRESH_MINLEN) {
 				printf("(refresh: trunc)");
 				goto trunc;
 			}
 			/* units of 4 secs */
 			printf("(refresh: %d)",
 				EXTRACT_16BITS(&bp[i+2]) << 2);
 			break;
 		case IP6MOPT_ALTCOA:
 			if (len - i < IP6MOPT_ALTCOA_MINLEN) {
 				printf("(altcoa: trunc)");
 				goto trunc;
 			}
 			printf("(alt-CoA: %s)", ip6addr_string(&bp[i+2]));
 			break;
 		case IP6MOPT_NONCEID:
 			if (len - i < IP6MOPT_NONCEID_MINLEN) {
 				printf("(ni: trunc)");
 				goto trunc;
 			}
 			printf("(ni: ho=0x%04x co=0x%04x)",
 				EXTRACT_16BITS(&bp[i+2]),
 				EXTRACT_16BITS(&bp[i+4]));
 			break;
 		case IP6MOPT_AUTH:
 			if (len - i < IP6MOPT_AUTH_MINLEN) {
 				printf("(auth: trunc)");
 				goto trunc;
 			}
 			printf("(auth)");
 			break;
 		default:
 			if (len - i < IP6MOPT_MINLEN) {
 				printf("(sopt_type %d: trunc)", bp[i]);
 				goto trunc;
 			}
 			printf("(type-0x%02x: len=%d)", bp[i], bp[i + 1]);
 			break;
 		}
 	}
 	return;

 trunc:
 	printf("[trunc] ");
 }

 /*
  * Mobility Header
  */
 int
 mobility_print(const u_char *bp, const u_char *bp2 _U_)
 {
 	const struct ip6_mobility *mh;
 	const u_char *ep;
 	int mhlen, hlen, type;

 	mh = (struct ip6_mobility *)bp;

 	/* 'ep' points to the end of available data. */
 	ep = snapend;

 	if (!TTEST(mh->ip6m_len)) {
 		/*
 		 * There's not enough captured data to include the
 		 * mobility header length.
 		 *
 		 * Our caller expects us to return the length, however,
 		 * so return a value that will run to the end of the
 		 * captured data.
 		 *
 		 * XXX - "ip6_print()" doesn't do anything with the
 		 * returned length, however, as it breaks out of the
 		 * header-processing loop.
 		 */
 		mhlen = ep - bp;
 		goto trunc;
 	}
 	mhlen = (int)((mh->ip6m_len + 1) << 3);

 	/* XXX ip6m_cksum */

 	TCHECK(mh->ip6m_type);
 	type = mh->ip6m_type;
 	switch (type) {
 	case IP6M_BINDING_REQUEST:
 		printf("mobility: BRR");
 		hlen = IP6M_MINLEN;
 		break;
 	case IP6M_HOME_TEST_INIT:
 	case IP6M_CAREOF_TEST_INIT:
 		printf("mobility: %soTI",
 			type == IP6M_HOME_TEST_INIT ? "H" : "C");
 		hlen = IP6M_MINLEN;
     		if (vflag) {
 			TCHECK2(*mh, hlen + 8);
 			printf(" %s Init Cookie=%08x:%08x",
 			       type == IP6M_HOME_TEST_INIT ? "Home" : "Care-of",
 			       EXTRACT_32BITS(&bp[hlen]),
 			       EXTRACT_32BITS(&bp[hlen + 4]));
 		}
 		hlen += 8;
 		break;
 	case IP6M_HOME_TEST:
 	case IP6M_CAREOF_TEST:
 		printf("mobility: %soT",
 			type == IP6M_HOME_TEST ? "H" : "C");
 		TCHECK(mh->ip6m_data16[0]);
 		printf(" nonce id=0x%x", EXTRACT_16BITS(&mh->ip6m_data16[0]));
 		hlen = IP6M_MINLEN;
     		if (vflag) {
 			TCHECK2(*mh, hlen + 8);
 			printf(" %s Init Cookie=%08x:%08x",
 			       type == IP6M_HOME_TEST ? "Home" : "Care-of",
 			       EXTRACT_32BITS(&bp[hlen]),
 			       EXTRACT_32BITS(&bp[hlen + 4]));
 		}
 		hlen += 8;
     		if (vflag) {
 			TCHECK2(*mh, hlen + 8);
 			printf(" %s Keygen Token=%08x:%08x",
 			       type == IP6M_HOME_TEST ? "Home" : "Care-of",
 			       EXTRACT_32BITS(&bp[hlen]),
 			       EXTRACT_32BITS(&bp[hlen + 4]));
 		}
 		hlen += 8;
 		break;
 	case IP6M_BINDING_UPDATE:
 		printf("mobility: BU");
 		TCHECK(mh->ip6m_data16[0]);
 		printf(" seq#=%d", EXTRACT_16BITS(&mh->ip6m_data16[0]));
 		hlen = IP6M_MINLEN;
 		TCHECK2(*mh, hlen + 1);
 		if (bp[hlen] & 0xf0)
 			printf(" ");
 		if (bp[hlen] & 0x80)
 			printf("A");
 		if (bp[hlen] & 0x40)
 			printf("H");
 		if (bp[hlen] & 0x20)
 			printf("L");
 		if (bp[hlen] & 0x10)
 			printf("K");
 		/* Reserved (4bits) */
 		hlen += 1;
 		/* Reserved (8bits) */
 		hlen += 1;
 		TCHECK2(*mh, hlen + 2);
 		/* units of 4 secs */
 		printf(" lifetime=%d", EXTRACT_16BITS(&bp[hlen]) << 2);
 		hlen += 2;
 		break;
 	case IP6M_BINDING_ACK:
 		printf("mobility: BA");
 		TCHECK(mh->ip6m_data8[0]);
 		printf(" status=%d", mh->ip6m_data8[0]);
 		if (mh->ip6m_data8[1] & 0x80)
 			printf(" K");
 		/* Reserved (7bits) */
 		hlen = IP6M_MINLEN;
 		TCHECK2(*mh, hlen + 2);
 		printf(" seq#=%d", EXTRACT_16BITS(&bp[hlen]));
 		hlen += 2;
 		TCHECK2(*mh, hlen + 2);
 		/* units of 4 secs */
 		printf(" lifetime=%d", EXTRACT_16BITS(&bp[hlen]) << 2);
 		hlen += 2;
 		break;
 	case IP6M_BINDING_ERROR:
 		printf("mobility: BE");
 		TCHECK(mh->ip6m_data8[0]);
 		printf(" status=%d", mh->ip6m_data8[0]);
 		/* Reserved */
 		hlen = IP6M_MINLEN;
 		TCHECK2(*mh, hlen + 16);
 		printf(" homeaddr %s", ip6addr_string(&bp[hlen]));
 		hlen += 16;
 		break;
 	default:
 		printf("mobility: type-#%d len=%d", type, mh->ip6m_len);
 		return(mhlen);
 		break;
 	}
     	if (vflag)
 		mobility_opt_print(&bp[hlen], mhlen - hlen);

 	return(mhlen);

  trunc:
 	fputs("[|MOBILITY]", stdout);
 	return(mhlen);
 }
 #endif /* INET6 */
	/*
	* Copyright (C) 2002 WIDE Project.
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	* 3. Neither the name of the project nor the names of its contributors
	* may be used to endorse or promote products derived from this software
	* without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	* SUCH DAMAGE.
	*/

	#ifdef HAVE_CONFIG_H
	#include "config.h"
	#endif

	#ifndef lint
	static const char rcsid[] _U_ =
	"@(#) $Header: /tcpdump/master/tcpdump/print-mobility.c,v 1.12 2005-04-20 22:21:00 guy Exp $";
	#endif

	#ifdef INET6
	#include <tcpdump-stdinc.h>

	#include <stdio.h>

	#include "ip6.h"

	#include "interface.h"
	#include "addrtoname.h"
	#include "extract.h" /* must come after interface.h */

	/* Mobility header */
	struct ip6_mobility {
	u_int8_t ip6m_pproto; /* following payload protocol (for PG) */
	u_int8_t ip6m_len; /* length in units of 8 octets */
	u_int8_t ip6m_type; /* message type */
	u_int8_t reserved; /* reserved */
	u_int16_t ip6m_cksum; /* sum of IPv6 pseudo-header and MH */
	union {
	u_int16_t ip6m_un_data16[1]; /* type-specific field */
	u_int8_t ip6m_un_data8[2]; /* type-specific fiedl */
	} ip6m_dataun;
	};

	#define ip6m_data16 ip6m_dataun.ip6m_un_data16
	#define ip6m_data8 ip6m_dataun.ip6m_un_data8

	#define IP6M_MINLEN 8

	/* message type */
	#define IP6M_BINDING_REQUEST 0 /* Binding Refresh Request */
	#define IP6M_HOME_TEST_INIT 1 /* Home Test Init */
	#define IP6M_CAREOF_TEST_INIT 2 /* Care-of Test Init */
	#define IP6M_HOME_TEST 3 /* Home Test */
	#define IP6M_CAREOF_TEST 4 /* Care-of Test */
	#define IP6M_BINDING_UPDATE 5 /* Binding Update */
	#define IP6M_BINDING_ACK 6 /* Binding Acknowledgement */
	#define IP6M_BINDING_ERROR 7 /* Binding Error */

	/* Mobility Header Options */
	#define IP6MOPT_MINLEN 2
	#define IP6MOPT_PAD1 0x0 /* Pad1 */
	#define IP6MOPT_PADN 0x1 /* PadN */
	#define IP6MOPT_REFRESH 0x2 /* Binding Refresh Advice */
	#define IP6MOPT_REFRESH_MINLEN 4
	#define IP6MOPT_ALTCOA 0x3 /* Alternate Care-of Address */
	#define IP6MOPT_ALTCOA_MINLEN 18
	#define IP6MOPT_NONCEID 0x4 /* Nonce Indices */
	#define IP6MOPT_NONCEID_MINLEN 6
	#define IP6MOPT_AUTH 0x5 /* Binding Authorization Data */
	#define IP6MOPT_AUTH_MINLEN 12

	static void
	mobility_opt_print(const u_char *bp, int len)
	{
	int i;
	int optlen;

	for (i = 0; i < len; i += optlen) {
	if (bp[i] == IP6MOPT_PAD1)
	optlen = 1;
	else {
	if (i + 1 < len)
	optlen = bp[i + 1] + 2;
	else
	goto trunc;
	}
	if (i + optlen > len)
	goto trunc;

	switch (bp[i]) {
	case IP6MOPT_PAD1:
	printf("(pad1)");
	break;
	case IP6MOPT_PADN:
	if (len - i < IP6MOPT_MINLEN) {
	printf("(padn: trunc)");
	goto trunc;
	}
	printf("(padn)");
	break;
	case IP6MOPT_REFRESH:
	if (len - i < IP6MOPT_REFRESH_MINLEN) {
	printf("(refresh: trunc)");
	goto trunc;
	}
	/* units of 4 secs */
	printf("(refresh: %d)",
	EXTRACT_16BITS(&bp[i+2]) << 2);
	break;
	case IP6MOPT_ALTCOA:
	if (len - i < IP6MOPT_ALTCOA_MINLEN) {
	printf("(altcoa: trunc)");
	goto trunc;
	}
	printf("(alt-CoA: %s)", ip6addr_string(&bp[i+2]));
	break;
	case IP6MOPT_NONCEID:
	if (len - i < IP6MOPT_NONCEID_MINLEN) {
	printf("(ni: trunc)");
	goto trunc;
	}
	printf("(ni: ho=0x%04x co=0x%04x)",
	EXTRACT_16BITS(&bp[i+2]),
	EXTRACT_16BITS(&bp[i+4]));
	break;
	case IP6MOPT_AUTH:
	if (len - i < IP6MOPT_AUTH_MINLEN) {
	printf("(auth: trunc)");
	goto trunc;
	}
	printf("(auth)");
	break;
	default:
	if (len - i < IP6MOPT_MINLEN) {
	printf("(sopt_type %d: trunc)", bp[i]);
	goto trunc;
	}
	printf("(type-0x%02x: len=%d)", bp[i], bp[i + 1]);
	break;
	}
	}
	return;

	trunc:
	printf("[trunc] ");
	}

	/*
	* Mobility Header
	*/
	int
	mobility_print(const u_char bp, const u_char bp2 _U_)
	{
	const struct ip6_mobility *mh;
	const u_char *ep;
	int mhlen, hlen, type;

	mh = (struct ip6_mobility *)bp;

	/* 'ep' points to the end of available data. */
	ep = snapend;

	if (!TTEST(mh->ip6m_len)) {
	/*
	* There's not enough captured data to include the
	* mobility header length.
	*
	* Our caller expects us to return the length, however,
	* so return a value that will run to the end of the
	* captured data.
	*
	* XXX - "ip6_print()" doesn't do anything with the
	* returned length, however, as it breaks out of the
	* header-processing loop.
	*/
	mhlen = ep - bp;
	goto trunc;
	}
	mhlen = (int)((mh->ip6m_len + 1) << 3);

	/* XXX ip6m_cksum */

	TCHECK(mh->ip6m_type);
	type = mh->ip6m_type;
	switch (type) {
	case IP6M_BINDING_REQUEST:
	printf("mobility: BRR");
	hlen = IP6M_MINLEN;
	break;
	case IP6M_HOME_TEST_INIT:
	case IP6M_CAREOF_TEST_INIT:
	printf("mobility: %soTI",
	type == IP6M_HOME_TEST_INIT ? "H" : "C");
	hlen = IP6M_MINLEN;
	if (vflag) {
	TCHECK2(*mh, hlen + 8);
	printf(" %s Init Cookie=%08x:%08x",
	type == IP6M_HOME_TEST_INIT ? "Home" : "Care-of",
	EXTRACT_32BITS(&bp[hlen]),
	EXTRACT_32BITS(&bp[hlen + 4]));
	}
	hlen += 8;
	break;
	case IP6M_HOME_TEST:
	case IP6M_CAREOF_TEST:
	printf("mobility: %soT",
	type == IP6M_HOME_TEST ? "H" : "C");
	TCHECK(mh->ip6m_data16[0]);
	printf(" nonce id=0x%x", EXTRACT_16BITS(&mh->ip6m_data16[0]));
	hlen = IP6M_MINLEN;
	if (vflag) {
	TCHECK2(*mh, hlen + 8);
	printf(" %s Init Cookie=%08x:%08x",
	type == IP6M_HOME_TEST ? "Home" : "Care-of",
	EXTRACT_32BITS(&bp[hlen]),
	EXTRACT_32BITS(&bp[hlen + 4]));
	}
	hlen += 8;
	if (vflag) {
	TCHECK2(*mh, hlen + 8);
	printf(" %s Keygen Token=%08x:%08x",
	type == IP6M_HOME_TEST ? "Home" : "Care-of",
	EXTRACT_32BITS(&bp[hlen]),
	EXTRACT_32BITS(&bp[hlen + 4]));
	}
	hlen += 8;
	break;
	case IP6M_BINDING_UPDATE:
	printf("mobility: BU");
	TCHECK(mh->ip6m_data16[0]);
	printf(" seq#=%d", EXTRACT_16BITS(&mh->ip6m_data16[0]));
	hlen = IP6M_MINLEN;
	TCHECK2(*mh, hlen + 1);
	if (bp[hlen] & 0xf0)
	printf(" ");
	if (bp[hlen] & 0x80)
	printf("A");
	if (bp[hlen] & 0x40)
	printf("H");
	if (bp[hlen] & 0x20)
	printf("L");
	if (bp[hlen] & 0x10)
	printf("K");
	/* Reserved (4bits) */
	hlen += 1;
	/* Reserved (8bits) */
	hlen += 1;
	TCHECK2(*mh, hlen + 2);
	/* units of 4 secs */
	printf(" lifetime=%d", EXTRACT_16BITS(&bp[hlen]) << 2);
	hlen += 2;
	break;
	case IP6M_BINDING_ACK:
	printf("mobility: BA");
	TCHECK(mh->ip6m_data8[0]);
	printf(" status=%d", mh->ip6m_data8[0]);
	if (mh->ip6m_data8[1] & 0x80)
	printf(" K");
	/* Reserved (7bits) */
	hlen = IP6M_MINLEN;
	TCHECK2(*mh, hlen + 2);
	printf(" seq#=%d", EXTRACT_16BITS(&bp[hlen]));
	hlen += 2;
	TCHECK2(*mh, hlen + 2);
	/* units of 4 secs */
	printf(" lifetime=%d", EXTRACT_16BITS(&bp[hlen]) << 2);
	hlen += 2;
	break;
	case IP6M_BINDING_ERROR:
	printf("mobility: BE");
	TCHECK(mh->ip6m_data8[0]);
	printf(" status=%d", mh->ip6m_data8[0]);
	/* Reserved */
	hlen = IP6M_MINLEN;
	TCHECK2(*mh, hlen + 16);
	printf(" homeaddr %s", ip6addr_string(&bp[hlen]));
	hlen += 16;
	break;
	default:
	printf("mobility: type-#%d len=%d", type, mh->ip6m_len);
	return(mhlen);
	break;
	}
	if (vflag)
	mobility_opt_print(&bp[hlen], mhlen - hlen);

	return(mhlen);

	trunc:
	fputs("[\|MOBILITY]", stdout);
	return(mhlen);
	}
	#endif /* INET6 */