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/* $OpenBSD: print-ip6opts.c,v 1.7 2020/01/24 22:46:37 procter Exp $ */
/*
* 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.
*/
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip6.h>
#include <stdio.h>
#include "interface.h"
#include "addrtoname.h"
void
ip6_opt_print(const u_char *bp, int len)
{
int i;
int optlen;
for (i = 0; i < len; i += optlen) {
switch (bp[i]) {
case IP6OPT_PAD1:
optlen = 1;
break;
case IP6OPT_PADN:
if (len - i < IP6OPT_MINLEN) {
printf("(padn: trunc)");
goto trunc;
}
optlen = bp[i + 1] + 2;
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) ", ntohs(*(u_short *)&bp[i + 2]));
optlen = IP6OPT_RTALERT_LEN;
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) ", (u_int32_t)ntohl(*(u_int *)&bp[i + 2]));
optlen = IP6OPT_JUMBO_LEN;
break;
default:
if (len - i < IP6OPT_MINLEN) {
printf("(type %d: trunc)", bp[i]);
goto trunc;
}
printf("(type 0x%02x: len=%d) ", bp[i], bp[i + 1]);
optlen = bp[i + 1] + 2;
break;
}
}
#if 0
end:
#endif
return;
trunc:
printf("[trunc] ");
}
int
hbhopt_print(const u_char *bp)
{
const struct ip6_hbh *dp = (struct ip6_hbh *)bp;
const u_char *ep;
int hbhlen = 0;
/* 'ep' points to the end of avaible data. */
ep = snapend;
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:
printf("[|HBH]");
return(hbhlen);
}
int
dstopt_print(const u_char *bp)
{
const struct ip6_dest *dp = (struct ip6_dest *)bp;
const u_char *ep;
int dstoptlen = 0;
/* 'ep' points to the end of avaible data. */
ep = snapend;
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:
printf("[|DSTOPT]");
return(dstoptlen);
}
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