161 lines
4.2 KiB
C
161 lines
4.2 KiB
C
/* $NetBSD: print-ip6opts.c,v 1.4 1999/12/10 05:45:08 itojun Exp $ */
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/*
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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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#ifndef lint
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: print-ip6opts.c,v 1.4 1999/12/10 05:45:08 itojun Exp $");
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#endif
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#ifdef INET6
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netinet/ip6.h>
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#include <stdio.h>
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#include "interface.h"
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#include "addrtoname.h"
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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;
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for (i = 0; i < len; i += optlen) {
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switch (bp[i]) {
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case IP6OPT_PAD1:
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optlen = 1;
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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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optlen = bp[i + 1] + 2;
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break;
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case IP6OPT_RTALERT:
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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) ", ntohs(*(u_short *)&bp[i + 2]));
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optlen = IP6OPT_RTALERT_LEN;
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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) ", (u_int32_t)ntohl(*(u_int *)&bp[i + 2]));
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optlen = IP6OPT_JUMBO_LEN;
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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("(type 0x%02x: len=%d) ", bp[i], bp[i + 1]);
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optlen = bp[i + 1] + 2;
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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 avaible 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(hbhlen);
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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 avaible 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(dstoptlen);
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}
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#endif /* INET6 */
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