/* * 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 1.17.2.1 2005/04/20 22:19:06 guy Exp $"; #endif #ifdef INET6 #include #include #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; 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; } } #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 */