336 lines
8.4 KiB
C
336 lines
8.4 KiB
C
/*
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* Copyright (C) 1998 WIDE Project.
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* 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 the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifndef lint
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static const char rcsid[] _U_ =
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"@(#) $Header: /tcpdump/master/tcpdump/print-ip6opts.c,v 1.14.2.3 2003/11/19 00:35:44 guy Exp $";
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#endif
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#ifdef INET6
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#include <tcpdump-stdinc.h>
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#include <stdio.h>
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#include "ip6.h"
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#include "interface.h"
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#include "addrtoname.h"
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#include "extract.h"
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/* items outside of rfc2292bis */
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#ifndef IP6OPT_MINLEN
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#define IP6OPT_MINLEN 2
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#endif
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#ifndef IP6OPT_RTALERT_LEN
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#define IP6OPT_RTALERT_LEN 4
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#endif
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#ifndef IP6OPT_JUMBO_LEN
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#define IP6OPT_JUMBO_LEN 6
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#endif
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#define IP6OPT_HOMEADDR_MINLEN 18
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#define IP6OPT_BU_MINLEN 10
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#define IP6OPT_BA_MINLEN 13
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#define IP6OPT_BR_MINLEN 2
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#define IP6SOPT_UI 0x2
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#define IP6SOPT_UI_MINLEN 4
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#define IP6SOPT_ALTCOA 0x3
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#define IP6SOPT_ALTCOA_MINLEN 18
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#define IP6SOPT_AUTH 0x4
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#define IP6SOPT_AUTH_MINLEN 6
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static void ip6_sopt_print(const u_char *, int);
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static void
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ip6_sopt_print(const u_char *bp, int len)
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{
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int i;
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int optlen;
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for (i = 0; i < len; i += optlen) {
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if (bp[i] == IP6OPT_PAD1)
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optlen = 1;
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else {
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if (i + 1 < len)
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optlen = bp[i + 1] + 2;
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else
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goto trunc;
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}
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if (i + optlen > len)
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goto trunc;
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switch (bp[i]) {
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case IP6OPT_PAD1:
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printf(", pad1");
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break;
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case IP6OPT_PADN:
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if (len - i < IP6OPT_MINLEN) {
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printf(", padn: trunc");
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goto trunc;
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}
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printf(", padn");
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break;
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case IP6SOPT_UI:
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if (len - i < IP6SOPT_UI_MINLEN) {
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printf(", ui: trunc");
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goto trunc;
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}
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printf(", ui: 0x%04x ", EXTRACT_16BITS(&bp[i + 2]));
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break;
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case IP6SOPT_ALTCOA:
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if (len - i < IP6SOPT_ALTCOA_MINLEN) {
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printf(", altcoa: trunc");
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goto trunc;
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}
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printf(", alt-CoA: %s", ip6addr_string(&bp[i+2]));
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break;
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case IP6SOPT_AUTH:
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if (len - i < IP6SOPT_AUTH_MINLEN) {
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printf(", auth: trunc");
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goto trunc;
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}
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printf(", auth spi: 0x%08x", EXTRACT_32BITS(&bp[i + 2]));
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break;
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default:
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if (len - i < IP6OPT_MINLEN) {
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printf(", sopt_type %d: trunc)", bp[i]);
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goto trunc;
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}
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printf(", sopt_type 0x%02x: len=%d", bp[i], bp[i + 1]);
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break;
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}
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}
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return;
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trunc:
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printf("[trunc] ");
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}
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void
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ip6_opt_print(const u_char *bp, int len)
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{
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int i;
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int optlen = 0;
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for (i = 0; i < len; i += optlen) {
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if (bp[i] == IP6OPT_PAD1)
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optlen = 1;
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else {
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if (i + 1 < len)
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optlen = bp[i + 1] + 2;
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else
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goto trunc;
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}
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if (i + optlen > len)
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goto trunc;
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switch (bp[i]) {
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case IP6OPT_PAD1:
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printf("(pad1)");
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break;
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case IP6OPT_PADN:
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if (len - i < IP6OPT_MINLEN) {
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printf("(padn: trunc)");
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goto trunc;
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}
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printf("(padn)");
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break;
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case IP6OPT_ROUTER_ALERT:
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if (len - i < IP6OPT_RTALERT_LEN) {
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printf("(rtalert: trunc)");
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goto trunc;
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}
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if (bp[i + 1] != IP6OPT_RTALERT_LEN - 2) {
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printf("(rtalert: invalid len %d)", bp[i + 1]);
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goto trunc;
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}
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printf("(rtalert: 0x%04x) ", EXTRACT_16BITS(&bp[i + 2]));
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break;
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case IP6OPT_JUMBO:
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if (len - i < IP6OPT_JUMBO_LEN) {
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printf("(jumbo: trunc)");
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goto trunc;
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}
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if (bp[i + 1] != IP6OPT_JUMBO_LEN - 2) {
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printf("(jumbo: invalid len %d)", bp[i + 1]);
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goto trunc;
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}
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printf("(jumbo: %u) ", EXTRACT_32BITS(&bp[i + 2]));
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break;
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case IP6OPT_HOME_ADDRESS:
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if (len - i < IP6OPT_HOMEADDR_MINLEN) {
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printf("(homeaddr: trunc)");
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goto trunc;
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}
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if (bp[i + 1] < IP6OPT_HOMEADDR_MINLEN - 2) {
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printf("(homeaddr: invalid len %d)", bp[i + 1]);
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goto trunc;
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}
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printf("(homeaddr: %s", ip6addr_string(&bp[i + 2]));
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if (bp[i + 1] > IP6OPT_HOMEADDR_MINLEN - 2) {
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ip6_sopt_print(&bp[i + IP6OPT_HOMEADDR_MINLEN],
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(optlen - IP6OPT_HOMEADDR_MINLEN));
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}
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printf(")");
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break;
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case IP6OPT_BINDING_UPDATE:
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if (len - i < IP6OPT_BU_MINLEN) {
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printf("(bu: trunc)");
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goto trunc;
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}
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if (bp[i + 1] < IP6OPT_BU_MINLEN - 2) {
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printf("(bu: invalid len %d)", bp[i + 1]);
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goto trunc;
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}
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printf("(bu: ");
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if (bp[i + 2] & 0x80)
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printf("A");
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if (bp[i + 2] & 0x40)
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printf("H");
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if (bp[i + 2] & 0x20)
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printf("S");
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if (bp[i + 2] & 0x10)
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printf("D");
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if ((bp[i + 2] & 0x0f) || bp[i + 3] || bp[i + 4])
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printf("res");
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printf(", sequence: %u", bp[i + 5]);
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printf(", lifetime: %u", EXTRACT_32BITS(&bp[i + 6]));
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if (bp[i + 1] > IP6OPT_BU_MINLEN - 2) {
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ip6_sopt_print(&bp[i + IP6OPT_BU_MINLEN],
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(optlen - IP6OPT_BU_MINLEN));
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}
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printf(")");
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break;
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case IP6OPT_BINDING_ACK:
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if (len - i < IP6OPT_BA_MINLEN) {
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printf("(ba: trunc)");
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goto trunc;
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}
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if (bp[i + 1] < IP6OPT_BA_MINLEN - 2) {
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printf("(ba: invalid len %d)", bp[i + 1]);
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goto trunc;
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}
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printf("(ba: ");
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printf("status: %u", bp[i + 2]);
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if (bp[i + 3])
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printf("res");
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printf(", sequence: %u", bp[i + 4]);
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printf(", lifetime: %u", EXTRACT_32BITS(&bp[i + 5]));
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printf(", refresh: %u", EXTRACT_32BITS(&bp[i + 9]));
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if (bp[i + 1] > IP6OPT_BA_MINLEN - 2) {
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ip6_sopt_print(&bp[i + IP6OPT_BA_MINLEN],
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(optlen - IP6OPT_BA_MINLEN));
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}
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printf(")");
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break;
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case IP6OPT_BINDING_REQ:
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if (len - i < IP6OPT_BR_MINLEN) {
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printf("(br: trunc)");
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goto trunc;
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}
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printf("(br");
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if (bp[i + 1] > IP6OPT_BR_MINLEN - 2) {
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ip6_sopt_print(&bp[i + IP6OPT_BR_MINLEN],
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(optlen - IP6OPT_BR_MINLEN));
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}
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printf(")");
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break;
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default:
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if (len - i < IP6OPT_MINLEN) {
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printf("(type %d: trunc)", bp[i]);
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goto trunc;
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}
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printf("(opt_type 0x%02x: len=%d) ", bp[i], bp[i + 1]);
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break;
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}
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}
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#if 0
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end:
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#endif
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return;
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trunc:
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printf("[trunc] ");
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}
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int
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hbhopt_print(register const u_char *bp)
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{
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const struct ip6_hbh *dp = (struct ip6_hbh *)bp;
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register const u_char *ep;
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int hbhlen = 0;
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/* 'ep' points to the end of available data. */
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ep = snapend;
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TCHECK(dp->ip6h_len);
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hbhlen = (int)((dp->ip6h_len + 1) << 3);
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TCHECK2(*dp, hbhlen);
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printf("HBH ");
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if (vflag)
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ip6_opt_print((const u_char *)dp + sizeof(*dp), hbhlen - sizeof(*dp));
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return(hbhlen);
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trunc:
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fputs("[|HBH]", stdout);
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return(-1);
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}
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int
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dstopt_print(register const u_char *bp)
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{
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const struct ip6_dest *dp = (struct ip6_dest *)bp;
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register const u_char *ep;
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int dstoptlen = 0;
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/* 'ep' points to the end of available data. */
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ep = snapend;
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TCHECK(dp->ip6d_len);
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dstoptlen = (int)((dp->ip6d_len + 1) << 3);
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TCHECK2(*dp, dstoptlen);
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printf("DSTOPT ");
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if (vflag) {
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ip6_opt_print((const u_char *)dp + sizeof(*dp),
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dstoptlen - sizeof(*dp));
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}
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return(dstoptlen);
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trunc:
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fputs("[|DSTOPT]", stdout);
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return(-1);
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}
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#endif /* INET6 */
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