2 * Copyright (C) 2002 WIDE Project.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
30 /* \summary: IPv6 mobility printer */
37 #include <netdissect-stdinc.h>
39 #include "netdissect.h"
40 #include "addrtoname.h"
45 static const char tstr[] = "[|MOBILITY]";
49 uint8_t ip6m_pproto; /* following payload protocol (for PG) */
50 uint8_t ip6m_len; /* length in units of 8 octets */
51 uint8_t ip6m_type; /* message type */
52 uint8_t reserved; /* reserved */
53 uint16_t ip6m_cksum; /* sum of IPv6 pseudo-header and MH */
55 uint16_t ip6m_un_data16[1]; /* type-specific field */
56 uint8_t ip6m_un_data8[2]; /* type-specific field */
60 #define ip6m_data16 ip6m_dataun.ip6m_un_data16
61 #define ip6m_data8 ip6m_dataun.ip6m_un_data8
65 /* http://www.iana.org/assignments/mobility-parameters/mobility-parameters.xhtml */
68 #define IP6M_BINDING_REQUEST 0 /* Binding Refresh Request */
69 #define IP6M_HOME_TEST_INIT 1 /* Home Test Init */
70 #define IP6M_CAREOF_TEST_INIT 2 /* Care-of Test Init */
71 #define IP6M_HOME_TEST 3 /* Home Test */
72 #define IP6M_CAREOF_TEST 4 /* Care-of Test */
73 #define IP6M_BINDING_UPDATE 5 /* Binding Update */
74 #define IP6M_BINDING_ACK 6 /* Binding Acknowledgement */
75 #define IP6M_BINDING_ERROR 7 /* Binding Error */
78 static const struct tok ip6m_str[] = {
79 { IP6M_BINDING_REQUEST, "BRR" },
80 { IP6M_HOME_TEST_INIT, "HoTI" },
81 { IP6M_CAREOF_TEST_INIT, "CoTI" },
82 { IP6M_HOME_TEST, "HoT" },
83 { IP6M_CAREOF_TEST, "CoT" },
84 { IP6M_BINDING_UPDATE, "BU" },
85 { IP6M_BINDING_ACK, "BA" },
86 { IP6M_BINDING_ERROR, "BE" },
90 static const unsigned ip6m_hdrlen[IP6M_MAX + 1] = {
91 IP6M_MINLEN, /* IP6M_BINDING_REQUEST */
92 IP6M_MINLEN + 8, /* IP6M_HOME_TEST_INIT */
93 IP6M_MINLEN + 8, /* IP6M_CAREOF_TEST_INIT */
94 IP6M_MINLEN + 16, /* IP6M_HOME_TEST */
95 IP6M_MINLEN + 16, /* IP6M_CAREOF_TEST */
96 IP6M_MINLEN + 4, /* IP6M_BINDING_UPDATE */
97 IP6M_MINLEN + 4, /* IP6M_BINDING_ACK */
98 IP6M_MINLEN + 16, /* IP6M_BINDING_ERROR */
101 /* Mobility Header Options */
102 #define IP6MOPT_MINLEN 2
103 #define IP6MOPT_PAD1 0x0 /* Pad1 */
104 #define IP6MOPT_PADN 0x1 /* PadN */
105 #define IP6MOPT_REFRESH 0x2 /* Binding Refresh Advice */
106 #define IP6MOPT_REFRESH_MINLEN 4
107 #define IP6MOPT_ALTCOA 0x3 /* Alternate Care-of Address */
108 #define IP6MOPT_ALTCOA_MINLEN 18
109 #define IP6MOPT_NONCEID 0x4 /* Nonce Indices */
110 #define IP6MOPT_NONCEID_MINLEN 6
111 #define IP6MOPT_AUTH 0x5 /* Binding Authorization Data */
112 #define IP6MOPT_AUTH_MINLEN 12
115 mobility_opt_print(netdissect_options *ndo,
116 const u_char *bp, const unsigned len)
120 for (i = 0; i < len; i += optlen) {
122 if (bp[i] == IP6MOPT_PAD1)
126 ND_TCHECK(bp[i + 1]);
127 optlen = bp[i + 1] + 2;
132 if (i + optlen > len)
134 ND_TCHECK(bp[i + optlen]);
138 ND_PRINT((ndo, "(pad1)"));
141 if (len - i < IP6MOPT_MINLEN) {
142 ND_PRINT((ndo, "(padn: trunc)"));
145 ND_PRINT((ndo, "(padn)"));
147 case IP6MOPT_REFRESH:
148 if (len - i < IP6MOPT_REFRESH_MINLEN) {
149 ND_PRINT((ndo, "(refresh: trunc)"));
152 /* units of 4 secs */
153 ND_TCHECK_16BITS(&bp[i+2]);
154 ND_PRINT((ndo, "(refresh: %u)",
155 EXTRACT_16BITS(&bp[i+2]) << 2));
158 if (len - i < IP6MOPT_ALTCOA_MINLEN) {
159 ND_PRINT((ndo, "(altcoa: trunc)"));
162 ND_TCHECK_128BITS(&bp[i+2]);
163 ND_PRINT((ndo, "(alt-CoA: %s)", ip6addr_string(ndo, &bp[i+2])));
165 case IP6MOPT_NONCEID:
166 if (len - i < IP6MOPT_NONCEID_MINLEN) {
167 ND_PRINT((ndo, "(ni: trunc)"));
170 ND_TCHECK_16BITS(&bp[i+2]);
171 ND_TCHECK_16BITS(&bp[i+4]);
172 ND_PRINT((ndo, "(ni: ho=0x%04x co=0x%04x)",
173 EXTRACT_16BITS(&bp[i+2]),
174 EXTRACT_16BITS(&bp[i+4])));
177 if (len - i < IP6MOPT_AUTH_MINLEN) {
178 ND_PRINT((ndo, "(auth: trunc)"));
181 ND_PRINT((ndo, "(auth)"));
184 if (len - i < IP6MOPT_MINLEN) {
185 ND_PRINT((ndo, "(sopt_type %u: trunc)", bp[i]));
188 ND_PRINT((ndo, "(type-0x%02x: len=%u)", bp[i], bp[i + 1]));
202 mobility_print(netdissect_options *ndo,
203 const u_char *bp, const u_char *bp2 _U_)
205 const struct ip6_mobility *mh;
207 unsigned mhlen, hlen;
210 mh = (const struct ip6_mobility *)bp;
212 /* 'ep' points to the end of available data. */
213 ep = ndo->ndo_snapend;
215 if (!ND_TTEST(mh->ip6m_len)) {
217 * There's not enough captured data to include the
218 * mobility header length.
220 * Our caller expects us to return the length, however,
221 * so return a value that will run to the end of the
224 * XXX - "ip6_print()" doesn't do anything with the
225 * returned length, however, as it breaks out of the
226 * header-processing loop.
231 mhlen = (mh->ip6m_len + 1) << 3;
235 ND_TCHECK(mh->ip6m_type);
236 type = mh->ip6m_type;
237 if (type <= IP6M_MAX && mhlen < ip6m_hdrlen[type]) {
238 ND_PRINT((ndo, "(header length %u is too small for type %u)", mhlen, type));
241 ND_PRINT((ndo, "mobility: %s", tok2str(ip6m_str, "type-#%u", type)));
243 case IP6M_BINDING_REQUEST:
246 case IP6M_HOME_TEST_INIT:
247 case IP6M_CAREOF_TEST_INIT:
249 if (ndo->ndo_vflag) {
250 ND_TCHECK_32BITS(&bp[hlen + 4]);
251 ND_PRINT((ndo, " %s Init Cookie=%08x:%08x",
252 type == IP6M_HOME_TEST_INIT ? "Home" : "Care-of",
253 EXTRACT_32BITS(&bp[hlen]),
254 EXTRACT_32BITS(&bp[hlen + 4])));
259 case IP6M_CAREOF_TEST:
260 ND_TCHECK(mh->ip6m_data16[0]);
261 ND_PRINT((ndo, " nonce id=0x%x", EXTRACT_16BITS(&mh->ip6m_data16[0])));
263 if (ndo->ndo_vflag) {
264 ND_TCHECK_32BITS(&bp[hlen + 4]);
265 ND_PRINT((ndo, " %s Init Cookie=%08x:%08x",
266 type == IP6M_HOME_TEST ? "Home" : "Care-of",
267 EXTRACT_32BITS(&bp[hlen]),
268 EXTRACT_32BITS(&bp[hlen + 4])));
271 if (ndo->ndo_vflag) {
272 ND_TCHECK_32BITS(&bp[hlen + 4]);
273 ND_PRINT((ndo, " %s Keygen Token=%08x:%08x",
274 type == IP6M_HOME_TEST ? "Home" : "Care-of",
275 EXTRACT_32BITS(&bp[hlen]),
276 EXTRACT_32BITS(&bp[hlen + 4])));
280 case IP6M_BINDING_UPDATE:
281 ND_TCHECK(mh->ip6m_data16[0]);
282 ND_PRINT((ndo, " seq#=%u", EXTRACT_16BITS(&mh->ip6m_data16[0])));
284 ND_TCHECK_16BITS(&bp[hlen]);
285 if (bp[hlen] & 0xf0) {
286 ND_PRINT((ndo, " "));
288 ND_PRINT((ndo, "A"));
290 ND_PRINT((ndo, "H"));
292 ND_PRINT((ndo, "L"));
294 ND_PRINT((ndo, "K"));
296 /* Reserved (4bits) */
298 /* Reserved (8bits) */
300 ND_TCHECK_16BITS(&bp[hlen]);
301 /* units of 4 secs */
302 ND_PRINT((ndo, " lifetime=%u", EXTRACT_16BITS(&bp[hlen]) << 2));
305 case IP6M_BINDING_ACK:
306 ND_TCHECK(mh->ip6m_data8[0]);
307 ND_PRINT((ndo, " status=%u", mh->ip6m_data8[0]));
308 ND_TCHECK(mh->ip6m_data8[1]);
309 if (mh->ip6m_data8[1] & 0x80)
310 ND_PRINT((ndo, " K"));
311 /* Reserved (7bits) */
313 ND_TCHECK_16BITS(&bp[hlen]);
314 ND_PRINT((ndo, " seq#=%u", EXTRACT_16BITS(&bp[hlen])));
316 ND_TCHECK_16BITS(&bp[hlen]);
317 /* units of 4 secs */
318 ND_PRINT((ndo, " lifetime=%u", EXTRACT_16BITS(&bp[hlen]) << 2));
321 case IP6M_BINDING_ERROR:
322 ND_TCHECK(mh->ip6m_data8[0]);
323 ND_PRINT((ndo, " status=%u", mh->ip6m_data8[0]));
326 ND_TCHECK2(bp[hlen], 16);
327 ND_PRINT((ndo, " homeaddr %s", ip6addr_string(ndo, &bp[hlen])));
331 ND_PRINT((ndo, " len=%u", mh->ip6m_len));
336 if (mobility_opt_print(ndo, &bp[hlen], mhlen - hlen))
342 ND_PRINT((ndo, "%s", tstr));