8f9cbee708b9ec446765d38f2923c55cff194206
[dragonfly.git] / contrib / tcpdump-3.9 / print-mobility.c
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_ =
36      "@(#) $Header: /tcpdump/master/tcpdump/print-mobility.c,v 1.11.2.1 2005/04/20 22:21:16 guy Exp $";
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 */