print-ip6opts.c - platform/external/tcpdump - Git at Google

 /*
  * Copyright (C) 1998 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-ip6opts.c,v 1.17.2.1 2005/04/20 22:19:06 guy Exp $";
 #endif

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

 #include <stdio.h>

 #include "ip6.h"

 #include "interface.h"
 #include "addrtoname.h"
 #include "extract.h"

 /* items outside of rfc2292bis */
 #ifndef IP6OPT_MINLEN
 #define IP6OPT_MINLEN	2
 #endif
 #ifndef IP6OPT_RTALERT_LEN
 #define IP6OPT_RTALERT_LEN	4
 #endif
 #ifndef IP6OPT_JUMBO_LEN
 #define IP6OPT_JUMBO_LEN	6
 #endif
 #define IP6OPT_HOMEADDR_MINLEN 18
 #define IP6OPT_BU_MINLEN       10
 #define IP6OPT_BA_MINLEN       13
 #define IP6OPT_BR_MINLEN        2
 #define IP6SOPT_UI            0x2
 #define IP6SOPT_UI_MINLEN       4
 #define IP6SOPT_ALTCOA        0x3
 #define IP6SOPT_ALTCOA_MINLEN  18
 #define IP6SOPT_AUTH          0x4
 #define IP6SOPT_AUTH_MINLEN     6

 static void ip6_sopt_print(const u_char *, int);

 static void
 ip6_sopt_print(const u_char *bp, int len)
 {
     int i;
     int optlen;

     for (i = 0; i < len; i += optlen) {
 	if (bp[i] == IP6OPT_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 IP6OPT_PAD1:
             printf(", pad1");
 	    break;
 	case IP6OPT_PADN:
 	    if (len - i < IP6OPT_MINLEN) {
 		printf(", padn: trunc");
 		goto trunc;
 	    }
             printf(", padn");
 	    break;
         case IP6SOPT_UI:
              if (len - i < IP6SOPT_UI_MINLEN) {
 		printf(", ui: trunc");
 		goto trunc;
 	    }
             printf(", ui: 0x%04x ", EXTRACT_16BITS(&bp[i + 2]));
 	    break;
         case IP6SOPT_ALTCOA:
              if (len - i < IP6SOPT_ALTCOA_MINLEN) {
 		printf(", altcoa: trunc");
 		goto trunc;
 	    }
             printf(", alt-CoA: %s", ip6addr_string(&bp[i+2]));
 	    break;
         case IP6SOPT_AUTH:
              if (len - i < IP6SOPT_AUTH_MINLEN) {
 		printf(", auth: trunc");
 		goto trunc;
 	    }
             printf(", auth spi: 0x%08x", EXTRACT_32BITS(&bp[i + 2]));
 	    break;
 	default:
 	    if (len - i < IP6OPT_MINLEN) {
 		printf(", sopt_type %d: trunc)", bp[i]);
 		goto trunc;
 	    }
 	    printf(", sopt_type 0x%02x: len=%d", bp[i], bp[i + 1]);
 	    break;
 	}
     }
     return;

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

 void
 ip6_opt_print(const u_char *bp, int len)
 {
     int i;
     int optlen = 0;

     for (i = 0; i < len; i += optlen) {
 	if (bp[i] == IP6OPT_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 IP6OPT_PAD1:
             printf("(pad1)");
 	    break;
 	case IP6OPT_PADN:
 	    if (len - i < IP6OPT_MINLEN) {
 		printf("(padn: trunc)");
 		goto trunc;
 	    }
             printf("(padn)");
 	    break;
 	case IP6OPT_ROUTER_ALERT:
 	    if (len - i < IP6OPT_RTALERT_LEN) {
 		printf("(rtalert: trunc)");
 		goto trunc;
 	    }
 	    if (bp[i + 1] != IP6OPT_RTALERT_LEN - 2) {
 		printf("(rtalert: invalid len %d)", bp[i + 1]);
 		goto trunc;
 	    }
 	    printf("(rtalert: 0x%04x) ", EXTRACT_16BITS(&bp[i + 2]));
 	    break;
 	case IP6OPT_JUMBO:
 	    if (len - i < IP6OPT_JUMBO_LEN) {
 		printf("(jumbo: trunc)");
 		goto trunc;
 	    }
 	    if (bp[i + 1] != IP6OPT_JUMBO_LEN - 2) {
 		printf("(jumbo: invalid len %d)", bp[i + 1]);
 		goto trunc;
 	    }
 	    printf("(jumbo: %u) ", EXTRACT_32BITS(&bp[i + 2]));
 	    break;
         case IP6OPT_HOME_ADDRESS:
 	    if (len - i < IP6OPT_HOMEADDR_MINLEN) {
 		printf("(homeaddr: trunc)");
 		goto trunc;
 	    }
 	    if (bp[i + 1] < IP6OPT_HOMEADDR_MINLEN - 2) {
 		printf("(homeaddr: invalid len %d)", bp[i + 1]);
 		goto trunc;
 	    }
 	    printf("(homeaddr: %s", ip6addr_string(&bp[i + 2]));
             if (bp[i + 1] > IP6OPT_HOMEADDR_MINLEN - 2) {
 		ip6_sopt_print(&bp[i + IP6OPT_HOMEADDR_MINLEN],
 		    (optlen - IP6OPT_HOMEADDR_MINLEN));
 	    }
             printf(")");
 	    break;
         case IP6OPT_BINDING_UPDATE:
 	    if (len - i < IP6OPT_BU_MINLEN) {
 		printf("(bu: trunc)");
 		goto trunc;
 	    }
 	    if (bp[i + 1] < IP6OPT_BU_MINLEN - 2) {
 		printf("(bu: invalid len %d)", bp[i + 1]);
 		goto trunc;
 	    }
 	    printf("(bu: ");
 	    if (bp[i + 2] & 0x80)
 		    printf("A");
 	    if (bp[i + 2] & 0x40)
 		    printf("H");
 	    if (bp[i + 2] & 0x20)
 		    printf("S");
 	    if (bp[i + 2] & 0x10)
 		    printf("D");
 	    if ((bp[i + 2] & 0x0f) || bp[i + 3] || bp[i + 4])
 		    printf("res");
 	    printf(", sequence: %u", bp[i + 5]);
 	    printf(", lifetime: %u", EXTRACT_32BITS(&bp[i + 6]));

 	    if (bp[i + 1] > IP6OPT_BU_MINLEN - 2) {
 		ip6_sopt_print(&bp[i + IP6OPT_BU_MINLEN],
 		    (optlen - IP6OPT_BU_MINLEN));
 	    }
 	    printf(")");
 	    break;
 	case IP6OPT_BINDING_ACK:
 	    if (len - i < IP6OPT_BA_MINLEN) {
 		printf("(ba: trunc)");
 		goto trunc;
 	    }
 	    if (bp[i + 1] < IP6OPT_BA_MINLEN - 2) {
 		printf("(ba: invalid len %d)", bp[i + 1]);
 		goto trunc;
 	    }
 	    printf("(ba: ");
 	    printf("status: %u", bp[i + 2]);
 	    if (bp[i + 3])
 		    printf("res");
 	    printf(", sequence: %u", bp[i + 4]);
 	    printf(", lifetime: %u", EXTRACT_32BITS(&bp[i + 5]));
 	    printf(", refresh: %u", EXTRACT_32BITS(&bp[i + 9]));

 	    if (bp[i + 1] > IP6OPT_BA_MINLEN - 2) {
 		ip6_sopt_print(&bp[i + IP6OPT_BA_MINLEN],
 		    (optlen - IP6OPT_BA_MINLEN));
 	    }
             printf(")");
 	    break;
         case IP6OPT_BINDING_REQ:
 	    if (len - i < IP6OPT_BR_MINLEN) {
 		printf("(br: trunc)");
 		goto trunc;
 	    }
             printf("(br");
             if (bp[i + 1] > IP6OPT_BR_MINLEN - 2) {
 		ip6_sopt_print(&bp[i + IP6OPT_BR_MINLEN],
 		    (optlen - IP6OPT_BR_MINLEN));
 	    }
             printf(")");
 	    break;
 	default:
 	    if (len - i < IP6OPT_MINLEN) {
 		printf("(type %d: trunc)", bp[i]);
 		goto trunc;
 	    }
 	    printf("(opt_type 0x%02x: len=%d) ", bp[i], bp[i + 1]);
 	    break;
 	}
     }

 #if 0
 end:
 #endif
     return;

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

 int
 hbhopt_print(register const u_char *bp)
 {
     const struct ip6_hbh *dp = (struct ip6_hbh *)bp;
     int hbhlen = 0;

     TCHECK(dp->ip6h_len);
     hbhlen = (int)((dp->ip6h_len + 1) << 3);
     TCHECK2(*dp, hbhlen);
     printf("HBH ");
     if (vflag)
 	ip6_opt_print((const u_char *)dp + sizeof(*dp), hbhlen - sizeof(*dp));

     return(hbhlen);

   trunc:
     fputs("[|HBH]", stdout);
     return(-1);
 }

 int
 dstopt_print(register const u_char *bp)
 {
     const struct ip6_dest *dp = (struct ip6_dest *)bp;
     int dstoptlen = 0;

     TCHECK(dp->ip6d_len);
     dstoptlen = (int)((dp->ip6d_len + 1) << 3);
     TCHECK2(*dp, dstoptlen);
     printf("DSTOPT ");
     if (vflag) {
 	ip6_opt_print((const u_char *)dp + sizeof(*dp),
 	    dstoptlen - sizeof(*dp));
     }

     return(dstoptlen);

   trunc:
     fputs("[|DSTOPT]", stdout);
     return(-1);
 }
 #endif /* INET6 */
	/*
	* Copyright (C) 1998 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-ip6opts.c,v 1.17.2.1 2005/04/20 22:19:06 guy Exp $";
	#endif

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

	#include <stdio.h>

	#include "ip6.h"

	#include "interface.h"
	#include "addrtoname.h"
	#include "extract.h"

	/* items outside of rfc2292bis */
	#ifndef IP6OPT_MINLEN
	#define IP6OPT_MINLEN 2
	#endif
	#ifndef IP6OPT_RTALERT_LEN
	#define IP6OPT_RTALERT_LEN 4
	#endif
	#ifndef IP6OPT_JUMBO_LEN
	#define IP6OPT_JUMBO_LEN 6
	#endif
	#define IP6OPT_HOMEADDR_MINLEN 18
	#define IP6OPT_BU_MINLEN 10
	#define IP6OPT_BA_MINLEN 13
	#define IP6OPT_BR_MINLEN 2
	#define IP6SOPT_UI 0x2
	#define IP6SOPT_UI_MINLEN 4
	#define IP6SOPT_ALTCOA 0x3
	#define IP6SOPT_ALTCOA_MINLEN 18
	#define IP6SOPT_AUTH 0x4
	#define IP6SOPT_AUTH_MINLEN 6

	static void ip6_sopt_print(const u_char *, int);

	static void
	ip6_sopt_print(const u_char *bp, int len)
	{
	int i;
	int optlen;

	for (i = 0; i < len; i += optlen) {
	if (bp[i] == IP6OPT_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 IP6OPT_PAD1:
	printf(", pad1");
	break;
	case IP6OPT_PADN:
	if (len - i < IP6OPT_MINLEN) {
	printf(", padn: trunc");
	goto trunc;
	}
	printf(", padn");
	break;
	case IP6SOPT_UI:
	if (len - i < IP6SOPT_UI_MINLEN) {
	printf(", ui: trunc");
	goto trunc;
	}
	printf(", ui: 0x%04x ", EXTRACT_16BITS(&bp[i + 2]));
	break;
	case IP6SOPT_ALTCOA:
	if (len - i < IP6SOPT_ALTCOA_MINLEN) {
	printf(", altcoa: trunc");
	goto trunc;
	}
	printf(", alt-CoA: %s", ip6addr_string(&bp[i+2]));
	break;
	case IP6SOPT_AUTH:
	if (len - i < IP6SOPT_AUTH_MINLEN) {
	printf(", auth: trunc");
	goto trunc;
	}
	printf(", auth spi: 0x%08x", EXTRACT_32BITS(&bp[i + 2]));
	break;
	default:
	if (len - i < IP6OPT_MINLEN) {
	printf(", sopt_type %d: trunc)", bp[i]);
	goto trunc;
	}
	printf(", sopt_type 0x%02x: len=%d", bp[i], bp[i + 1]);
	break;
	}
	}
	return;

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

	void
	ip6_opt_print(const u_char *bp, int len)
	{
	int i;
	int optlen = 0;

	for (i = 0; i < len; i += optlen) {
	if (bp[i] == IP6OPT_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 IP6OPT_PAD1:
	printf("(pad1)");
	break;
	case IP6OPT_PADN:
	if (len - i < IP6OPT_MINLEN) {
	printf("(padn: trunc)");
	goto trunc;
	}
	printf("(padn)");
	break;
	case IP6OPT_ROUTER_ALERT:
	if (len - i < IP6OPT_RTALERT_LEN) {
	printf("(rtalert: trunc)");
	goto trunc;
	}
	if (bp[i + 1] != IP6OPT_RTALERT_LEN - 2) {
	printf("(rtalert: invalid len %d)", bp[i + 1]);
	goto trunc;
	}
	printf("(rtalert: 0x%04x) ", EXTRACT_16BITS(&bp[i + 2]));
	break;
	case IP6OPT_JUMBO:
	if (len - i < IP6OPT_JUMBO_LEN) {
	printf("(jumbo: trunc)");
	goto trunc;
	}
	if (bp[i + 1] != IP6OPT_JUMBO_LEN - 2) {
	printf("(jumbo: invalid len %d)", bp[i + 1]);
	goto trunc;
	}
	printf("(jumbo: %u) ", EXTRACT_32BITS(&bp[i + 2]));
	break;
	case IP6OPT_HOME_ADDRESS:
	if (len - i < IP6OPT_HOMEADDR_MINLEN) {
	printf("(homeaddr: trunc)");
	goto trunc;
	}
	if (bp[i + 1] < IP6OPT_HOMEADDR_MINLEN - 2) {
	printf("(homeaddr: invalid len %d)", bp[i + 1]);
	goto trunc;
	}
	printf("(homeaddr: %s", ip6addr_string(&bp[i + 2]));
	if (bp[i + 1] > IP6OPT_HOMEADDR_MINLEN - 2) {
	ip6_sopt_print(&bp[i + IP6OPT_HOMEADDR_MINLEN],
	(optlen - IP6OPT_HOMEADDR_MINLEN));
	}
	printf(")");
	break;
	case IP6OPT_BINDING_UPDATE:
	if (len - i < IP6OPT_BU_MINLEN) {
	printf("(bu: trunc)");
	goto trunc;
	}
	if (bp[i + 1] < IP6OPT_BU_MINLEN - 2) {
	printf("(bu: invalid len %d)", bp[i + 1]);
	goto trunc;
	}
	printf("(bu: ");
	if (bp[i + 2] & 0x80)
	printf("A");
	if (bp[i + 2] & 0x40)
	printf("H");
	if (bp[i + 2] & 0x20)
	printf("S");
	if (bp[i + 2] & 0x10)
	printf("D");
	if ((bp[i + 2] & 0x0f) \|\| bp[i + 3] \|\| bp[i + 4])
	printf("res");
	printf(", sequence: %u", bp[i + 5]);
	printf(", lifetime: %u", EXTRACT_32BITS(&bp[i + 6]));

	if (bp[i + 1] > IP6OPT_BU_MINLEN - 2) {
	ip6_sopt_print(&bp[i + IP6OPT_BU_MINLEN],
	(optlen - IP6OPT_BU_MINLEN));
	}
	printf(")");
	break;
	case IP6OPT_BINDING_ACK:
	if (len - i < IP6OPT_BA_MINLEN) {
	printf("(ba: trunc)");
	goto trunc;
	}
	if (bp[i + 1] < IP6OPT_BA_MINLEN - 2) {
	printf("(ba: invalid len %d)", bp[i + 1]);
	goto trunc;
	}
	printf("(ba: ");
	printf("status: %u", bp[i + 2]);
	if (bp[i + 3])
	printf("res");
	printf(", sequence: %u", bp[i + 4]);
	printf(", lifetime: %u", EXTRACT_32BITS(&bp[i + 5]));
	printf(", refresh: %u", EXTRACT_32BITS(&bp[i + 9]));

	if (bp[i + 1] > IP6OPT_BA_MINLEN - 2) {
	ip6_sopt_print(&bp[i + IP6OPT_BA_MINLEN],
	(optlen - IP6OPT_BA_MINLEN));
	}
	printf(")");
	break;
	case IP6OPT_BINDING_REQ:
	if (len - i < IP6OPT_BR_MINLEN) {
	printf("(br: trunc)");
	goto trunc;
	}
	printf("(br");
	if (bp[i + 1] > IP6OPT_BR_MINLEN - 2) {
	ip6_sopt_print(&bp[i + IP6OPT_BR_MINLEN],
	(optlen - IP6OPT_BR_MINLEN));
	}
	printf(")");
	break;
	default:
	if (len - i < IP6OPT_MINLEN) {
	printf("(type %d: trunc)", bp[i]);
	goto trunc;
	}
	printf("(opt_type 0x%02x: len=%d) ", bp[i], bp[i + 1]);
	break;
	}
	}

	#if 0
	end:
	#endif
	return;

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

	int
	hbhopt_print(register const u_char *bp)
	{
	const struct ip6_hbh dp = (struct ip6_hbh )bp;
	int hbhlen = 0;

	TCHECK(dp->ip6h_len);
	hbhlen = (int)((dp->ip6h_len + 1) << 3);
	TCHECK2(*dp, hbhlen);
	printf("HBH ");
	if (vflag)
	ip6_opt_print((const u_char )dp + sizeof(dp), hbhlen - sizeof(*dp));

	return(hbhlen);

	trunc:
	fputs("[\|HBH]", stdout);
	return(-1);
	}

	int
	dstopt_print(register const u_char *bp)
	{
	const struct ip6_dest dp = (struct ip6_dest )bp;
	int dstoptlen = 0;

	TCHECK(dp->ip6d_len);
	dstoptlen = (int)((dp->ip6d_len + 1) << 3);
	TCHECK2(*dp, dstoptlen);
	printf("DSTOPT ");
	if (vflag) {
	ip6_opt_print((const u_char )dp + sizeof(dp),
	dstoptlen - sizeof(*dp));
	}

	return(dstoptlen);

	trunc:
	fputs("[\|DSTOPT]", stdout);
	return(-1);
	}
	#endif /* INET6 */