| /* |
| * 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. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #ifndef lint |
| static const char rcsid[] _U_ = |
| "@(#) $Header: /tcpdump/master/tcpdump/print-ip6opts.c,v 1.18 2005-04-20 22:18:50 guy Exp $"; |
| #endif |
| |
| #ifdef INET6 |
| #include <tcpdump-stdinc.h> |
| |
| #include <stdio.h> |
| |
| #include "ip6.h" |
| |
| #include "interface.h" |
| #include "addrtoname.h" |
| #include "extract.h" |
| |
| /* items outside of rfc2292bis */ |
| #ifndef IP6OPT_MINLEN |
| #define IP6OPT_MINLEN 2 |
| #endif |
| #ifndef IP6OPT_RTALERT_LEN |
| #define IP6OPT_RTALERT_LEN 4 |
| #endif |
| #ifndef IP6OPT_JUMBO_LEN |
| #define IP6OPT_JUMBO_LEN 6 |
| #endif |
| #define IP6OPT_HOMEADDR_MINLEN 18 |
| #define IP6OPT_BU_MINLEN 10 |
| #define IP6OPT_BA_MINLEN 13 |
| #define IP6OPT_BR_MINLEN 2 |
| #define IP6SOPT_UI 0x2 |
| #define IP6SOPT_UI_MINLEN 4 |
| #define IP6SOPT_ALTCOA 0x3 |
| #define IP6SOPT_ALTCOA_MINLEN 18 |
| #define IP6SOPT_AUTH 0x4 |
| #define IP6SOPT_AUTH_MINLEN 6 |
| |
| static void ip6_sopt_print(const u_char *, int); |
| |
| static void |
| ip6_sopt_print(const u_char *bp, int len) |
| { |
| int i; |
| int optlen; |
| |
| for (i = 0; i < len; i += optlen) { |
| if (bp[i] == IP6OPT_PAD1) |
| optlen = 1; |
| else { |
| if (i + 1 < len) |
| optlen = bp[i + 1] + 2; |
| else |
| goto trunc; |
| } |
| if (i + optlen > len) |
| goto trunc; |
| |
| switch (bp[i]) { |
| case IP6OPT_PAD1: |
| printf(", pad1"); |
| break; |
| case IP6OPT_PADN: |
| if (len - i < IP6OPT_MINLEN) { |
| printf(", padn: trunc"); |
| goto trunc; |
| } |
| printf(", padn"); |
| break; |
| case IP6SOPT_UI: |
| if (len - i < IP6SOPT_UI_MINLEN) { |
| printf(", ui: trunc"); |
| goto trunc; |
| } |
| printf(", ui: 0x%04x ", EXTRACT_16BITS(&bp[i + 2])); |
| break; |
| case IP6SOPT_ALTCOA: |
| if (len - i < IP6SOPT_ALTCOA_MINLEN) { |
| printf(", altcoa: trunc"); |
| goto trunc; |
| } |
| printf(", alt-CoA: %s", ip6addr_string(&bp[i+2])); |
| break; |
| case IP6SOPT_AUTH: |
| if (len - i < IP6SOPT_AUTH_MINLEN) { |
| printf(", auth: trunc"); |
| goto trunc; |
| } |
| printf(", auth spi: 0x%08x", EXTRACT_32BITS(&bp[i + 2])); |
| break; |
| default: |
| if (len - i < IP6OPT_MINLEN) { |
| printf(", sopt_type %d: trunc)", bp[i]); |
| goto trunc; |
| } |
| printf(", sopt_type 0x%02x: len=%d", bp[i], bp[i + 1]); |
| break; |
| } |
| } |
| return; |
| |
| trunc: |
| printf("[trunc] "); |
| } |
| |
| void |
| ip6_opt_print(const u_char *bp, int len) |
| { |
| int i; |
| int optlen = 0; |
| |
| if (len == 0) |
| return; |
| for (i = 0; i < len; i += optlen) { |
| if (bp[i] == IP6OPT_PAD1) |
| optlen = 1; |
| else { |
| if (i + 1 < len) |
| optlen = bp[i + 1] + 2; |
| else |
| goto trunc; |
| } |
| if (i + optlen > len) |
| goto trunc; |
| |
| switch (bp[i]) { |
| case IP6OPT_PAD1: |
| printf("(pad1)"); |
| break; |
| case IP6OPT_PADN: |
| if (len - i < IP6OPT_MINLEN) { |
| printf("(padn: trunc)"); |
| goto trunc; |
| } |
| printf("(padn)"); |
| 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) ", EXTRACT_16BITS(&bp[i + 2])); |
| 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) ", EXTRACT_32BITS(&bp[i + 2])); |
| break; |
| case IP6OPT_HOME_ADDRESS: |
| if (len - i < IP6OPT_HOMEADDR_MINLEN) { |
| printf("(homeaddr: trunc)"); |
| goto trunc; |
| } |
| if (bp[i + 1] < IP6OPT_HOMEADDR_MINLEN - 2) { |
| printf("(homeaddr: invalid len %d)", bp[i + 1]); |
| goto trunc; |
| } |
| printf("(homeaddr: %s", ip6addr_string(&bp[i + 2])); |
| if (bp[i + 1] > IP6OPT_HOMEADDR_MINLEN - 2) { |
| ip6_sopt_print(&bp[i + IP6OPT_HOMEADDR_MINLEN], |
| (optlen - IP6OPT_HOMEADDR_MINLEN)); |
| } |
| printf(")"); |
| break; |
| case IP6OPT_BINDING_UPDATE: |
| if (len - i < IP6OPT_BU_MINLEN) { |
| printf("(bu: trunc)"); |
| goto trunc; |
| } |
| if (bp[i + 1] < IP6OPT_BU_MINLEN - 2) { |
| printf("(bu: invalid len %d)", bp[i + 1]); |
| goto trunc; |
| } |
| printf("(bu: "); |
| if (bp[i + 2] & 0x80) |
| printf("A"); |
| if (bp[i + 2] & 0x40) |
| printf("H"); |
| if (bp[i + 2] & 0x20) |
| printf("S"); |
| if (bp[i + 2] & 0x10) |
| printf("D"); |
| if ((bp[i + 2] & 0x0f) || bp[i + 3] || bp[i + 4]) |
| printf("res"); |
| printf(", sequence: %u", bp[i + 5]); |
| printf(", lifetime: %u", EXTRACT_32BITS(&bp[i + 6])); |
| |
| if (bp[i + 1] > IP6OPT_BU_MINLEN - 2) { |
| ip6_sopt_print(&bp[i + IP6OPT_BU_MINLEN], |
| (optlen - IP6OPT_BU_MINLEN)); |
| } |
| printf(")"); |
| break; |
| case IP6OPT_BINDING_ACK: |
| if (len - i < IP6OPT_BA_MINLEN) { |
| printf("(ba: trunc)"); |
| goto trunc; |
| } |
| if (bp[i + 1] < IP6OPT_BA_MINLEN - 2) { |
| printf("(ba: invalid len %d)", bp[i + 1]); |
| goto trunc; |
| } |
| printf("(ba: "); |
| printf("status: %u", bp[i + 2]); |
| if (bp[i + 3]) |
| printf("res"); |
| printf(", sequence: %u", bp[i + 4]); |
| printf(", lifetime: %u", EXTRACT_32BITS(&bp[i + 5])); |
| printf(", refresh: %u", EXTRACT_32BITS(&bp[i + 9])); |
| |
| if (bp[i + 1] > IP6OPT_BA_MINLEN - 2) { |
| ip6_sopt_print(&bp[i + IP6OPT_BA_MINLEN], |
| (optlen - IP6OPT_BA_MINLEN)); |
| } |
| printf(")"); |
| break; |
| case IP6OPT_BINDING_REQ: |
| if (len - i < IP6OPT_BR_MINLEN) { |
| printf("(br: trunc)"); |
| goto trunc; |
| } |
| printf("(br"); |
| if (bp[i + 1] > IP6OPT_BR_MINLEN - 2) { |
| ip6_sopt_print(&bp[i + IP6OPT_BR_MINLEN], |
| (optlen - IP6OPT_BR_MINLEN)); |
| } |
| printf(")"); |
| break; |
| default: |
| if (len - i < IP6OPT_MINLEN) { |
| printf("(type %d: trunc)", bp[i]); |
| goto trunc; |
| } |
| printf("(opt_type 0x%02x: len=%d)", bp[i], bp[i + 1]); |
| break; |
| } |
| } |
| printf(" "); |
| |
| #if 0 |
| end: |
| #endif |
| return; |
| |
| trunc: |
| printf("[trunc] "); |
| } |
| |
| int |
| hbhopt_print(register const u_char *bp) |
| { |
| const struct ip6_hbh *dp = (struct ip6_hbh *)bp; |
| int hbhlen = 0; |
| |
| 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(-1); |
| } |
| |
| int |
| dstopt_print(register const u_char *bp) |
| { |
| const struct ip6_dest *dp = (struct ip6_dest *)bp; |
| int dstoptlen = 0; |
| |
| 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(-1); |
| } |
| #endif /* INET6 */ |