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
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30 /* \summary: IPv6 mobility printer */
36 #include <netdissect-stdinc.h>
39 #include "netdissect.h"
40 #include "addrtoname.h"
43 static const char tstr[] = "[|MOBILITY]";
47 uint8_t ip6m_pproto; /* following payload protocol (for PG) */
48 uint8_t ip6m_len; /* length in units of 8 octets */
49 uint8_t ip6m_type; /* message type */
50 uint8_t reserved; /* reserved */
51 uint16_t ip6m_cksum; /* sum of IPv6 pseudo-header and MH */
53 uint16_t ip6m_un_data16[1]; /* type-specific field */
54 uint8_t ip6m_un_data8[2]; /* type-specific field */
58 #define ip6m_data16 ip6m_dataun.ip6m_un_data16
59 #define ip6m_data8 ip6m_dataun.ip6m_un_data8
63 /* http://www.iana.org/assignments/mobility-parameters/mobility-parameters.xhtml */
66 #define IP6M_BINDING_REQUEST 0 /* Binding Refresh Request */
67 #define IP6M_HOME_TEST_INIT 1 /* Home Test Init */
68 #define IP6M_CAREOF_TEST_INIT 2 /* Care-of Test Init */
69 #define IP6M_HOME_TEST 3 /* Home Test */
70 #define IP6M_CAREOF_TEST 4 /* Care-of Test */
71 #define IP6M_BINDING_UPDATE 5 /* Binding Update */
72 #define IP6M_BINDING_ACK 6 /* Binding Acknowledgement */
73 #define IP6M_BINDING_ERROR 7 /* Binding Error */
76 static const struct tok ip6m_str[] = {
77 { IP6M_BINDING_REQUEST, "BRR" },
78 { IP6M_HOME_TEST_INIT, "HoTI" },
79 { IP6M_CAREOF_TEST_INIT, "CoTI" },
80 { IP6M_HOME_TEST, "HoT" },
81 { IP6M_CAREOF_TEST, "CoT" },
82 { IP6M_BINDING_UPDATE, "BU" },
83 { IP6M_BINDING_ACK, "BA" },
84 { IP6M_BINDING_ERROR, "BE" },
88 static const unsigned ip6m_hdrlen[IP6M_MAX + 1] = {
89 IP6M_MINLEN, /* IP6M_BINDING_REQUEST */
90 IP6M_MINLEN + 8, /* IP6M_HOME_TEST_INIT */
91 IP6M_MINLEN + 8, /* IP6M_CAREOF_TEST_INIT */
92 IP6M_MINLEN + 16, /* IP6M_HOME_TEST */
93 IP6M_MINLEN + 16, /* IP6M_CAREOF_TEST */
94 IP6M_MINLEN + 4, /* IP6M_BINDING_UPDATE */
95 IP6M_MINLEN + 4, /* IP6M_BINDING_ACK */
96 IP6M_MINLEN + 16, /* IP6M_BINDING_ERROR */
99 /* Mobility Header Options */
100 #define IP6MOPT_MINLEN 2
101 #define IP6MOPT_PAD1 0x0 /* Pad1 */
102 #define IP6MOPT_PADN 0x1 /* PadN */
103 #define IP6MOPT_REFRESH 0x2 /* Binding Refresh Advice */
104 #define IP6MOPT_REFRESH_MINLEN 4
105 #define IP6MOPT_ALTCOA 0x3 /* Alternate Care-of Address */
106 #define IP6MOPT_ALTCOA_MINLEN 18
107 #define IP6MOPT_NONCEID 0x4 /* Nonce Indices */
108 #define IP6MOPT_NONCEID_MINLEN 6
109 #define IP6MOPT_AUTH 0x5 /* Binding Authorization Data */
110 #define IP6MOPT_AUTH_MINLEN 12
113 mobility_opt_print(netdissect_options *ndo,
114 const u_char *bp, const unsigned len)
118 for (i = 0; i < len; i += optlen) {
120 if (bp[i] == IP6MOPT_PAD1)
124 ND_TCHECK(bp[i + 1]);
125 optlen = bp[i + 1] + 2;
130 if (i + optlen > len)
132 ND_TCHECK(bp[i + optlen]);
136 ND_PRINT((ndo, "(pad1)"));
139 if (len - i < IP6MOPT_MINLEN) {
140 ND_PRINT((ndo, "(padn: trunc)"));
143 ND_PRINT((ndo, "(padn)"));
145 case IP6MOPT_REFRESH:
146 if (len - i < IP6MOPT_REFRESH_MINLEN) {
147 ND_PRINT((ndo, "(refresh: trunc)"));
150 /* units of 4 secs */
151 ND_PRINT((ndo, "(refresh: %u)",
152 EXTRACT_16BITS(&bp[i+2]) << 2));
155 if (len - i < IP6MOPT_ALTCOA_MINLEN) {
156 ND_PRINT((ndo, "(altcoa: trunc)"));
159 ND_PRINT((ndo, "(alt-CoA: %s)", ip6addr_string(ndo, &bp[i+2])));
161 case IP6MOPT_NONCEID:
162 if (len - i < IP6MOPT_NONCEID_MINLEN) {
163 ND_PRINT((ndo, "(ni: trunc)"));
166 ND_PRINT((ndo, "(ni: ho=0x%04x co=0x%04x)",
167 EXTRACT_16BITS(&bp[i+2]),
168 EXTRACT_16BITS(&bp[i+4])));
171 if (len - i < IP6MOPT_AUTH_MINLEN) {
172 ND_PRINT((ndo, "(auth: trunc)"));
175 ND_PRINT((ndo, "(auth)"));
178 if (len - i < IP6MOPT_MINLEN) {
179 ND_PRINT((ndo, "(sopt_type %u: trunc)", bp[i]));
182 ND_PRINT((ndo, "(type-0x%02x: len=%u)", bp[i], bp[i + 1]));
196 mobility_print(netdissect_options *ndo,
197 const u_char *bp, const u_char *bp2 _U_)
199 const struct ip6_mobility *mh;
201 unsigned mhlen, hlen;
204 mh = (const struct ip6_mobility *)bp;
206 /* 'ep' points to the end of available data. */
207 ep = ndo->ndo_snapend;
209 if (!ND_TTEST(mh->ip6m_len)) {
211 * There's not enough captured data to include the
212 * mobility header length.
214 * Our caller expects us to return the length, however,
215 * so return a value that will run to the end of the
218 * XXX - "ip6_print()" doesn't do anything with the
219 * returned length, however, as it breaks out of the
220 * header-processing loop.
225 mhlen = (mh->ip6m_len + 1) << 3;
229 ND_TCHECK(mh->ip6m_type);
230 type = mh->ip6m_type;
231 if (type <= IP6M_MAX && mhlen < ip6m_hdrlen[type]) {
232 ND_PRINT((ndo, "(header length %u is too small for type %u)", mhlen, type));
235 ND_PRINT((ndo, "mobility: %s", tok2str(ip6m_str, "type-#%u", type)));
237 case IP6M_BINDING_REQUEST:
240 case IP6M_HOME_TEST_INIT:
241 case IP6M_CAREOF_TEST_INIT:
243 if (ndo->ndo_vflag) {
244 ND_TCHECK2(*mh, hlen + 8);
245 ND_PRINT((ndo, " %s Init Cookie=%08x:%08x",
246 type == IP6M_HOME_TEST_INIT ? "Home" : "Care-of",
247 EXTRACT_32BITS(&bp[hlen]),
248 EXTRACT_32BITS(&bp[hlen + 4])));
253 case IP6M_CAREOF_TEST:
254 ND_TCHECK(mh->ip6m_data16[0]);
255 ND_PRINT((ndo, " nonce id=0x%x", EXTRACT_16BITS(&mh->ip6m_data16[0])));
257 if (ndo->ndo_vflag) {
258 ND_TCHECK2(*mh, hlen + 8);
259 ND_PRINT((ndo, " %s Init Cookie=%08x:%08x",
260 type == IP6M_HOME_TEST ? "Home" : "Care-of",
261 EXTRACT_32BITS(&bp[hlen]),
262 EXTRACT_32BITS(&bp[hlen + 4])));
265 if (ndo->ndo_vflag) {
266 ND_TCHECK2(*mh, hlen + 8);
267 ND_PRINT((ndo, " %s Keygen Token=%08x:%08x",
268 type == IP6M_HOME_TEST ? "Home" : "Care-of",
269 EXTRACT_32BITS(&bp[hlen]),
270 EXTRACT_32BITS(&bp[hlen + 4])));
274 case IP6M_BINDING_UPDATE:
275 ND_TCHECK(mh->ip6m_data16[0]);
276 ND_PRINT((ndo, " seq#=%u", EXTRACT_16BITS(&mh->ip6m_data16[0])));
278 ND_TCHECK2(*mh, hlen + 1);
280 ND_PRINT((ndo, " "));
282 ND_PRINT((ndo, "A"));
284 ND_PRINT((ndo, "H"));
286 ND_PRINT((ndo, "L"));
288 ND_PRINT((ndo, "K"));
289 /* Reserved (4bits) */
291 /* Reserved (8bits) */
293 ND_TCHECK2(*mh, hlen + 2);
294 /* units of 4 secs */
295 ND_PRINT((ndo, " lifetime=%u", EXTRACT_16BITS(&bp[hlen]) << 2));
298 case IP6M_BINDING_ACK:
299 ND_TCHECK(mh->ip6m_data8[0]);
300 ND_PRINT((ndo, " status=%u", mh->ip6m_data8[0]));
301 if (mh->ip6m_data8[1] & 0x80)
302 ND_PRINT((ndo, " K"));
303 /* Reserved (7bits) */
305 ND_TCHECK2(*mh, hlen + 2);
306 ND_PRINT((ndo, " seq#=%u", EXTRACT_16BITS(&bp[hlen])));
308 ND_TCHECK2(*mh, hlen + 2);
309 /* units of 4 secs */
310 ND_PRINT((ndo, " lifetime=%u", EXTRACT_16BITS(&bp[hlen]) << 2));
313 case IP6M_BINDING_ERROR:
314 ND_TCHECK(mh->ip6m_data8[0]);
315 ND_PRINT((ndo, " status=%u", mh->ip6m_data8[0]));
318 ND_TCHECK2(*mh, hlen + 16);
319 ND_PRINT((ndo, " homeaddr %s", ip6addr_string(ndo, &bp[hlen])));
323 ND_PRINT((ndo, " len=%u", mh->ip6m_len));
328 if (mobility_opt_print(ndo, &bp[hlen], mhlen - hlen))
334 ND_PRINT((ndo, "%s", tstr));