The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2002 WIDE Project. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. Neither the name of the project nor the names of its contributors |
| 14 | * may be used to endorse or promote products derived from this software |
| 15 | * without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | #ifdef HAVE_CONFIG_H |
| 31 | #include "config.h" |
| 32 | #endif |
| 33 | |
| 34 | #ifndef lint |
| 35 | static const char rcsid[] _U_ = |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 36 | "@(#) $Header: /tcpdump/master/tcpdump/print-mobility.c,v 1.12 2005-04-20 22:21:00 guy Exp $"; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 37 | #endif |
| 38 | |
| 39 | #ifdef INET6 |
| 40 | #include <tcpdump-stdinc.h> |
| 41 | |
| 42 | #include <stdio.h> |
| 43 | |
| 44 | #include "ip6.h" |
| 45 | |
| 46 | #include "interface.h" |
| 47 | #include "addrtoname.h" |
| 48 | #include "extract.h" /* must come after interface.h */ |
| 49 | |
| 50 | /* Mobility header */ |
| 51 | struct ip6_mobility { |
| 52 | u_int8_t ip6m_pproto; /* following payload protocol (for PG) */ |
| 53 | u_int8_t ip6m_len; /* length in units of 8 octets */ |
| 54 | u_int8_t ip6m_type; /* message type */ |
| 55 | u_int8_t reserved; /* reserved */ |
| 56 | u_int16_t ip6m_cksum; /* sum of IPv6 pseudo-header and MH */ |
| 57 | union { |
| 58 | u_int16_t ip6m_un_data16[1]; /* type-specific field */ |
| 59 | u_int8_t ip6m_un_data8[2]; /* type-specific fiedl */ |
| 60 | } ip6m_dataun; |
| 61 | }; |
| 62 | |
| 63 | #define ip6m_data16 ip6m_dataun.ip6m_un_data16 |
| 64 | #define ip6m_data8 ip6m_dataun.ip6m_un_data8 |
| 65 | |
| 66 | #define IP6M_MINLEN 8 |
| 67 | |
| 68 | /* message type */ |
| 69 | #define IP6M_BINDING_REQUEST 0 /* Binding Refresh Request */ |
| 70 | #define IP6M_HOME_TEST_INIT 1 /* Home Test Init */ |
| 71 | #define IP6M_CAREOF_TEST_INIT 2 /* Care-of Test Init */ |
| 72 | #define IP6M_HOME_TEST 3 /* Home Test */ |
| 73 | #define IP6M_CAREOF_TEST 4 /* Care-of Test */ |
| 74 | #define IP6M_BINDING_UPDATE 5 /* Binding Update */ |
| 75 | #define IP6M_BINDING_ACK 6 /* Binding Acknowledgement */ |
| 76 | #define IP6M_BINDING_ERROR 7 /* Binding Error */ |
| 77 | |
| 78 | /* Mobility Header Options */ |
| 79 | #define IP6MOPT_MINLEN 2 |
| 80 | #define IP6MOPT_PAD1 0x0 /* Pad1 */ |
| 81 | #define IP6MOPT_PADN 0x1 /* PadN */ |
| 82 | #define IP6MOPT_REFRESH 0x2 /* Binding Refresh Advice */ |
| 83 | #define IP6MOPT_REFRESH_MINLEN 4 |
| 84 | #define IP6MOPT_ALTCOA 0x3 /* Alternate Care-of Address */ |
| 85 | #define IP6MOPT_ALTCOA_MINLEN 18 |
| 86 | #define IP6MOPT_NONCEID 0x4 /* Nonce Indices */ |
| 87 | #define IP6MOPT_NONCEID_MINLEN 6 |
| 88 | #define IP6MOPT_AUTH 0x5 /* Binding Authorization Data */ |
| 89 | #define IP6MOPT_AUTH_MINLEN 12 |
| 90 | |
| 91 | static void |
| 92 | mobility_opt_print(const u_char *bp, int len) |
| 93 | { |
| 94 | int i; |
| 95 | int optlen; |
| 96 | |
| 97 | for (i = 0; i < len; i += optlen) { |
| 98 | if (bp[i] == IP6MOPT_PAD1) |
| 99 | optlen = 1; |
| 100 | else { |
| 101 | if (i + 1 < len) |
| 102 | optlen = bp[i + 1] + 2; |
| 103 | else |
| 104 | goto trunc; |
| 105 | } |
| 106 | if (i + optlen > len) |
| 107 | goto trunc; |
| 108 | |
| 109 | switch (bp[i]) { |
| 110 | case IP6MOPT_PAD1: |
| 111 | printf("(pad1)"); |
| 112 | break; |
| 113 | case IP6MOPT_PADN: |
| 114 | if (len - i < IP6MOPT_MINLEN) { |
| 115 | printf("(padn: trunc)"); |
| 116 | goto trunc; |
| 117 | } |
| 118 | printf("(padn)"); |
| 119 | break; |
| 120 | case IP6MOPT_REFRESH: |
| 121 | if (len - i < IP6MOPT_REFRESH_MINLEN) { |
| 122 | printf("(refresh: trunc)"); |
| 123 | goto trunc; |
| 124 | } |
| 125 | /* units of 4 secs */ |
| 126 | printf("(refresh: %d)", |
| 127 | EXTRACT_16BITS(&bp[i+2]) << 2); |
| 128 | break; |
| 129 | case IP6MOPT_ALTCOA: |
| 130 | if (len - i < IP6MOPT_ALTCOA_MINLEN) { |
| 131 | printf("(altcoa: trunc)"); |
| 132 | goto trunc; |
| 133 | } |
| 134 | printf("(alt-CoA: %s)", ip6addr_string(&bp[i+2])); |
| 135 | break; |
| 136 | case IP6MOPT_NONCEID: |
| 137 | if (len - i < IP6MOPT_NONCEID_MINLEN) { |
| 138 | printf("(ni: trunc)"); |
| 139 | goto trunc; |
| 140 | } |
| 141 | printf("(ni: ho=0x%04x co=0x%04x)", |
| 142 | EXTRACT_16BITS(&bp[i+2]), |
| 143 | EXTRACT_16BITS(&bp[i+4])); |
| 144 | break; |
| 145 | case IP6MOPT_AUTH: |
| 146 | if (len - i < IP6MOPT_AUTH_MINLEN) { |
| 147 | printf("(auth: trunc)"); |
| 148 | goto trunc; |
| 149 | } |
| 150 | printf("(auth)"); |
| 151 | break; |
| 152 | default: |
| 153 | if (len - i < IP6MOPT_MINLEN) { |
| 154 | printf("(sopt_type %d: trunc)", bp[i]); |
| 155 | goto trunc; |
| 156 | } |
| 157 | printf("(type-0x%02x: len=%d)", bp[i], bp[i + 1]); |
| 158 | break; |
| 159 | } |
| 160 | } |
| 161 | return; |
| 162 | |
| 163 | trunc: |
| 164 | printf("[trunc] "); |
| 165 | } |
| 166 | |
| 167 | /* |
| 168 | * Mobility Header |
| 169 | */ |
| 170 | int |
| 171 | mobility_print(const u_char *bp, const u_char *bp2 _U_) |
| 172 | { |
| 173 | const struct ip6_mobility *mh; |
| 174 | const u_char *ep; |
| 175 | int mhlen, hlen, type; |
| 176 | |
| 177 | mh = (struct ip6_mobility *)bp; |
| 178 | |
| 179 | /* 'ep' points to the end of available data. */ |
| 180 | ep = snapend; |
| 181 | |
| 182 | if (!TTEST(mh->ip6m_len)) { |
| 183 | /* |
| 184 | * There's not enough captured data to include the |
| 185 | * mobility header length. |
| 186 | * |
| 187 | * Our caller expects us to return the length, however, |
| 188 | * so return a value that will run to the end of the |
| 189 | * captured data. |
| 190 | * |
| 191 | * XXX - "ip6_print()" doesn't do anything with the |
| 192 | * returned length, however, as it breaks out of the |
| 193 | * header-processing loop. |
| 194 | */ |
| 195 | mhlen = ep - bp; |
| 196 | goto trunc; |
| 197 | } |
| 198 | mhlen = (int)((mh->ip6m_len + 1) << 3); |
| 199 | |
| 200 | /* XXX ip6m_cksum */ |
| 201 | |
| 202 | TCHECK(mh->ip6m_type); |
| 203 | type = mh->ip6m_type; |
| 204 | switch (type) { |
| 205 | case IP6M_BINDING_REQUEST: |
| 206 | printf("mobility: BRR"); |
| 207 | hlen = IP6M_MINLEN; |
| 208 | break; |
| 209 | case IP6M_HOME_TEST_INIT: |
| 210 | case IP6M_CAREOF_TEST_INIT: |
| 211 | printf("mobility: %soTI", |
| 212 | type == IP6M_HOME_TEST_INIT ? "H" : "C"); |
| 213 | hlen = IP6M_MINLEN; |
| 214 | if (vflag) { |
| 215 | TCHECK2(*mh, hlen + 8); |
| 216 | printf(" %s Init Cookie=%08x:%08x", |
| 217 | type == IP6M_HOME_TEST_INIT ? "Home" : "Care-of", |
| 218 | EXTRACT_32BITS(&bp[hlen]), |
| 219 | EXTRACT_32BITS(&bp[hlen + 4])); |
| 220 | } |
| 221 | hlen += 8; |
| 222 | break; |
| 223 | case IP6M_HOME_TEST: |
| 224 | case IP6M_CAREOF_TEST: |
| 225 | printf("mobility: %soT", |
| 226 | type == IP6M_HOME_TEST ? "H" : "C"); |
| 227 | TCHECK(mh->ip6m_data16[0]); |
| 228 | printf(" nonce id=0x%x", EXTRACT_16BITS(&mh->ip6m_data16[0])); |
| 229 | hlen = IP6M_MINLEN; |
| 230 | if (vflag) { |
| 231 | TCHECK2(*mh, hlen + 8); |
| 232 | printf(" %s Init Cookie=%08x:%08x", |
| 233 | type == IP6M_HOME_TEST ? "Home" : "Care-of", |
| 234 | EXTRACT_32BITS(&bp[hlen]), |
| 235 | EXTRACT_32BITS(&bp[hlen + 4])); |
| 236 | } |
| 237 | hlen += 8; |
| 238 | if (vflag) { |
| 239 | TCHECK2(*mh, hlen + 8); |
| 240 | printf(" %s Keygen Token=%08x:%08x", |
| 241 | type == IP6M_HOME_TEST ? "Home" : "Care-of", |
| 242 | EXTRACT_32BITS(&bp[hlen]), |
| 243 | EXTRACT_32BITS(&bp[hlen + 4])); |
| 244 | } |
| 245 | hlen += 8; |
| 246 | break; |
| 247 | case IP6M_BINDING_UPDATE: |
| 248 | printf("mobility: BU"); |
| 249 | TCHECK(mh->ip6m_data16[0]); |
| 250 | printf(" seq#=%d", EXTRACT_16BITS(&mh->ip6m_data16[0])); |
| 251 | hlen = IP6M_MINLEN; |
| 252 | TCHECK2(*mh, hlen + 1); |
| 253 | if (bp[hlen] & 0xf0) |
| 254 | printf(" "); |
| 255 | if (bp[hlen] & 0x80) |
| 256 | printf("A"); |
| 257 | if (bp[hlen] & 0x40) |
| 258 | printf("H"); |
| 259 | if (bp[hlen] & 0x20) |
| 260 | printf("L"); |
| 261 | if (bp[hlen] & 0x10) |
| 262 | printf("K"); |
| 263 | /* Reserved (4bits) */ |
| 264 | hlen += 1; |
| 265 | /* Reserved (8bits) */ |
| 266 | hlen += 1; |
| 267 | TCHECK2(*mh, hlen + 2); |
| 268 | /* units of 4 secs */ |
| 269 | printf(" lifetime=%d", EXTRACT_16BITS(&bp[hlen]) << 2); |
| 270 | hlen += 2; |
| 271 | break; |
| 272 | case IP6M_BINDING_ACK: |
| 273 | printf("mobility: BA"); |
| 274 | TCHECK(mh->ip6m_data8[0]); |
| 275 | printf(" status=%d", mh->ip6m_data8[0]); |
| 276 | if (mh->ip6m_data8[1] & 0x80) |
| 277 | printf(" K"); |
| 278 | /* Reserved (7bits) */ |
| 279 | hlen = IP6M_MINLEN; |
| 280 | TCHECK2(*mh, hlen + 2); |
| 281 | printf(" seq#=%d", EXTRACT_16BITS(&bp[hlen])); |
| 282 | hlen += 2; |
| 283 | TCHECK2(*mh, hlen + 2); |
| 284 | /* units of 4 secs */ |
| 285 | printf(" lifetime=%d", EXTRACT_16BITS(&bp[hlen]) << 2); |
| 286 | hlen += 2; |
| 287 | break; |
| 288 | case IP6M_BINDING_ERROR: |
| 289 | printf("mobility: BE"); |
| 290 | TCHECK(mh->ip6m_data8[0]); |
| 291 | printf(" status=%d", mh->ip6m_data8[0]); |
| 292 | /* Reserved */ |
| 293 | hlen = IP6M_MINLEN; |
| 294 | TCHECK2(*mh, hlen + 16); |
| 295 | printf(" homeaddr %s", ip6addr_string(&bp[hlen])); |
| 296 | hlen += 16; |
| 297 | break; |
| 298 | default: |
| 299 | printf("mobility: type-#%d len=%d", type, mh->ip6m_len); |
| 300 | return(mhlen); |
| 301 | break; |
| 302 | } |
| 303 | if (vflag) |
| 304 | mobility_opt_print(&bp[hlen], mhlen - hlen); |
| 305 | |
| 306 | return(mhlen); |
| 307 | |
| 308 | trunc: |
| 309 | fputs("[|MOBILITY]", stdout); |
| 310 | return(mhlen); |
| 311 | } |
| 312 | #endif /* INET6 */ |