/* $OpenBSD: print-ip6opts.c,v 1.6 2018/10/22 16:12:45 kn 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 #include #include #include #include #include #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: fputs("[|HBH]", stdout); 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: fputs("[|DSTOPT]", stdout); return(dstoptlen); }