/* $NetBSD: print-mobility.c,v 1.2 2007/07/24 11:53:45 drochner Exp $ */ /* * Copyright (C) 2002 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 #include #ifndef lint #if 0 static const char rcsid[] _U_ = "@(#) Header: /tcpdump/master/tcpdump/print-mobility.c,v 1.11.2.1 2005/04/20 22:21:16 guy Exp"; #else __RCSID("$NetBSD: print-mobility.c,v 1.2 2007/07/24 11:53:45 drochner Exp $"); #endif #endif #ifdef INET6 #include #include #include "ip6.h" #include "interface.h" #include "addrtoname.h" #include "extract.h" /* must come after interface.h */ /* Mobility header */ struct ip6_mobility { u_int8_t ip6m_pproto; /* following payload protocol (for PG) */ u_int8_t ip6m_len; /* length in units of 8 octets */ u_int8_t ip6m_type; /* message type */ u_int8_t reserved; /* reserved */ u_int16_t ip6m_cksum; /* sum of IPv6 pseudo-header and MH */ union { u_int16_t ip6m_un_data16[1]; /* type-specific field */ u_int8_t ip6m_un_data8[2]; /* type-specific fiedl */ } ip6m_dataun; }; #define ip6m_data16 ip6m_dataun.ip6m_un_data16 #define ip6m_data8 ip6m_dataun.ip6m_un_data8 #define IP6M_MINLEN 8 /* message type */ #define IP6M_BINDING_REQUEST 0 /* Binding Refresh Request */ #define IP6M_HOME_TEST_INIT 1 /* Home Test Init */ #define IP6M_CAREOF_TEST_INIT 2 /* Care-of Test Init */ #define IP6M_HOME_TEST 3 /* Home Test */ #define IP6M_CAREOF_TEST 4 /* Care-of Test */ #define IP6M_BINDING_UPDATE 5 /* Binding Update */ #define IP6M_BINDING_ACK 6 /* Binding Acknowledgement */ #define IP6M_BINDING_ERROR 7 /* Binding Error */ /* Mobility Header Options */ #define IP6MOPT_MINLEN 2 #define IP6MOPT_PAD1 0x0 /* Pad1 */ #define IP6MOPT_PADN 0x1 /* PadN */ #define IP6MOPT_REFRESH 0x2 /* Binding Refresh Advice */ #define IP6MOPT_REFRESH_MINLEN 4 #define IP6MOPT_ALTCOA 0x3 /* Alternate Care-of Address */ #define IP6MOPT_ALTCOA_MINLEN 18 #define IP6MOPT_NONCEID 0x4 /* Nonce Indices */ #define IP6MOPT_NONCEID_MINLEN 6 #define IP6MOPT_AUTH 0x5 /* Binding Authorization Data */ #define IP6MOPT_AUTH_MINLEN 12 static void mobility_opt_print(const u_char *bp, int len) { int i; int optlen; for (i = 0; i < len; i += optlen) { if (bp[i] == IP6MOPT_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 IP6MOPT_PAD1: printf("(pad1)"); break; case IP6MOPT_PADN: if (len - i < IP6MOPT_MINLEN) { printf("(padn: trunc)"); goto trunc; } printf("(padn)"); break; case IP6MOPT_REFRESH: if (len - i < IP6MOPT_REFRESH_MINLEN) { printf("(refresh: trunc)"); goto trunc; } /* units of 4 secs */ printf("(refresh: %d)", EXTRACT_16BITS(&bp[i+2]) << 2); break; case IP6MOPT_ALTCOA: if (len - i < IP6MOPT_ALTCOA_MINLEN) { printf("(altcoa: trunc)"); goto trunc; } printf("(alt-CoA: %s)", ip6addr_string(&bp[i+2])); break; case IP6MOPT_NONCEID: if (len - i < IP6MOPT_NONCEID_MINLEN) { printf("(ni: trunc)"); goto trunc; } printf("(ni: ho=0x%04x co=0x%04x)", EXTRACT_16BITS(&bp[i+2]), EXTRACT_16BITS(&bp[i+4])); break; case IP6MOPT_AUTH: if (len - i < IP6MOPT_AUTH_MINLEN) { printf("(auth: trunc)"); goto trunc; } printf("(auth)"); break; default: if (len - i < IP6MOPT_MINLEN) { printf("(sopt_type %d: trunc)", bp[i]); goto trunc; } printf("(type-0x%02x: len=%d)", bp[i], bp[i + 1]); break; } } return; trunc: printf("[trunc] "); } /* * Mobility Header */ int mobility_print(const u_char *bp, const u_char *bp2 _U_) { const struct ip6_mobility *mh; const u_char *ep; int mhlen, hlen, type; mh = (struct ip6_mobility *)bp; /* 'ep' points to the end of available data. */ ep = snapend; if (!TTEST(mh->ip6m_len)) { /* * There's not enough captured data to include the * mobility header length. * * Our caller expects us to return the length, however, * so return a value that will run to the end of the * captured data. * * XXX - "ip6_print()" doesn't do anything with the * returned length, however, as it breaks out of the * header-processing loop. */ mhlen = ep - bp; goto trunc; } mhlen = (int)((mh->ip6m_len + 1) << 3); /* XXX ip6m_cksum */ TCHECK(mh->ip6m_type); type = mh->ip6m_type; switch (type) { case IP6M_BINDING_REQUEST: printf("mobility: BRR"); hlen = IP6M_MINLEN; break; case IP6M_HOME_TEST_INIT: case IP6M_CAREOF_TEST_INIT: printf("mobility: %soTI", type == IP6M_HOME_TEST_INIT ? "H" : "C"); hlen = IP6M_MINLEN; if (vflag) { TCHECK2(*mh, hlen + 8); printf(" %s Init Cookie=%08x:%08x", type == IP6M_HOME_TEST_INIT ? "Home" : "Care-of", EXTRACT_32BITS(&bp[hlen]), EXTRACT_32BITS(&bp[hlen + 4])); } hlen += 8; break; case IP6M_HOME_TEST: case IP6M_CAREOF_TEST: printf("mobility: %soT", type == IP6M_HOME_TEST ? "H" : "C"); TCHECK(mh->ip6m_data16[0]); printf(" nonce id=0x%x", EXTRACT_16BITS(&mh->ip6m_data16[0])); hlen = IP6M_MINLEN; if (vflag) { TCHECK2(*mh, hlen + 8); printf(" %s Init Cookie=%08x:%08x", type == IP6M_HOME_TEST ? "Home" : "Care-of", EXTRACT_32BITS(&bp[hlen]), EXTRACT_32BITS(&bp[hlen + 4])); } hlen += 8; if (vflag) { TCHECK2(*mh, hlen + 8); printf(" %s Keygen Token=%08x:%08x", type == IP6M_HOME_TEST ? "Home" : "Care-of", EXTRACT_32BITS(&bp[hlen]), EXTRACT_32BITS(&bp[hlen + 4])); } hlen += 8; break; case IP6M_BINDING_UPDATE: printf("mobility: BU"); TCHECK(mh->ip6m_data16[0]); printf(" seq#=%d", EXTRACT_16BITS(&mh->ip6m_data16[0])); hlen = IP6M_MINLEN; TCHECK2(*mh, hlen + 1); if (bp[hlen] & 0xf0) printf(" "); if (bp[hlen] & 0x80) printf("A"); if (bp[hlen] & 0x40) printf("H"); if (bp[hlen] & 0x20) printf("L"); if (bp[hlen] & 0x10) printf("K"); /* Reserved (4bits) */ hlen += 1; /* Reserved (8bits) */ hlen += 1; TCHECK2(*mh, hlen + 2); /* units of 4 secs */ printf(" lifetime=%d", EXTRACT_16BITS(&bp[hlen]) << 2); hlen += 2; break; case IP6M_BINDING_ACK: printf("mobility: BA"); TCHECK(mh->ip6m_data8[0]); printf(" status=%d", mh->ip6m_data8[0]); if (mh->ip6m_data8[1] & 0x80) printf(" K"); /* Reserved (7bits) */ hlen = IP6M_MINLEN; TCHECK2(*mh, hlen + 2); printf(" seq#=%d", EXTRACT_16BITS(&bp[hlen])); hlen += 2; TCHECK2(*mh, hlen + 2); /* units of 4 secs */ printf(" lifetime=%d", EXTRACT_16BITS(&bp[hlen]) << 2); hlen += 2; break; case IP6M_BINDING_ERROR: printf("mobility: BE"); TCHECK(mh->ip6m_data8[0]); printf(" status=%d", mh->ip6m_data8[0]); /* Reserved */ hlen = IP6M_MINLEN; TCHECK2(*mh, hlen + 16); printf(" homeaddr %s", ip6addr_string(&bp[hlen])); hlen += 16; break; default: printf("mobility: type-#%d len=%d", type, mh->ip6m_len); return(mhlen); break; } if (vflag) mobility_opt_print(&bp[hlen], mhlen - hlen); return(mhlen); trunc: fputs("[|MOBILITY]", stdout); return(mhlen); } #endif /* INET6 */