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/* $OpenBSD: print-ip6opts.c,v 1.5 2015/11/16 00:16:39 mmcc 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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#ifdef INET6 |
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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_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) ", 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(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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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(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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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 */ |