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[netsniff-ng.git] / proto_ipv6_mobility_hdr.c
blob549d4f040b4fa151f0bf8ef98a4667c5e9482c62
1 /*
2 * netsniff-ng - the packet sniffing beast
3 * Copyright 2012 Markus Amend <markus@netsniff-ng.org>, Deutsche Flugsicherung GmbH
4 * Subject to the GPL, version 2.
6 * IPv6 Mobility Header described in RFC6275
7 */
9 #include <stdio.h>
10 #include <stdint.h>
11 #include <netinet/in.h> /* for ntohs() */
12 #include <arpa/inet.h>
14 #include "proto.h"
15 #include "protos.h"
16 #include "dissector_eth.h"
17 #include "built_in.h"
18 #include "pkt_buff.h"
20 #define BINDING_REFRESH_REQUEST_MESSAGE 0x00
21 #define HOME_TEST_INIT_MESSAGE 0x01
22 #define CARE_OF_TEST_INIT_MESSAGE 0x02
23 #define HOME_TEST_MESSAGE 0x03
24 #define CARE_OF_TEST_MESSAGE 0x04
25 #define BINDING_UPDATE_MESSAGE 0x05
26 #define BINDING_ACKNOWLEDGEMENT_MESSAGE 0x06
27 #define BINDING_ERROR_MESSAGE 0x07
29 struct mobilityhdr {
30 uint8_t payload_proto;
31 uint8_t hdr_len;
32 uint8_t MH_type;
33 uint8_t reserved;
34 uint16_t chksum;
35 uint8_t msgdata[0];
36 } __packed;
38 struct bin_refr_req_msg {
39 uint16_t reserved;
40 uint8_t mobility_opt[0];
41 } __packed;
43 /* for 0x01 and 0x02 */
44 struct tst_init_msg {
45 uint16_t reserved;
46 uint64_t init_cookie;
47 uint8_t mobility_opt[0];
48 } __packed;
50 /* for 0x03 and 0x04 */
51 struct tst_msg {
52 uint16_t nonce_index;
53 uint64_t init_cookie;
54 uint64_t keygen_token;
55 uint8_t mobility_opt[0];
56 } __packed;
58 struct bind_upd_msg {
59 uint16_t sequence;
60 uint16_t ahlk_res;
61 uint16_t lifetime;
62 uint8_t mobility_opt[0];
63 } __packed;
65 struct bind_ack_msg {
66 uint8_t status;
67 uint8_t k_res;
68 uint16_t sequence;
69 uint16_t lifetime;
70 uint8_t mobility_opt[0];
71 } __packed;
73 struct bind_err_msg {
74 uint8_t status;
75 uint8_t res;
76 uint64_t home_addr;
77 uint8_t mobility_opt[0];
78 } __packed;
81 static void dissect_mobility_options(struct pkt_buff *pkt,
82 ssize_t *message_data_len)
84 /* Have to been upgraded.
85 * http://tools.ietf.org/html/rfc6275#section-6.2.1
87 if (*message_data_len)
88 tprintf("MH Option(s) recognized ");
90 /* If adding dissector reduce message_data_len for each using of
91 * pkt_pull to the same size.
95 static void dissect_mobilityhdr_type_0(struct pkt_buff *pkt,
96 ssize_t *message_data_len)
98 struct bin_refr_req_msg *type_0;
100 type_0 = (struct bin_refr_req_msg *) pkt_pull(pkt, sizeof(*type_0));
101 *message_data_len -= sizeof(*type_0);
102 if (type_0 == NULL || *message_data_len > pkt_len(pkt) ||
103 *message_data_len < 0)
104 return;
106 dissect_mobility_options(pkt, message_data_len);
109 static void dissect_mobilityhdr_type_1_2(struct pkt_buff *pkt,
110 ssize_t *message_data_len)
112 struct tst_init_msg *type_1_2;
114 type_1_2 = (struct tst_init_msg *) pkt_pull(pkt, sizeof(*type_1_2));
115 *message_data_len -= sizeof(*type_1_2);
116 if (type_1_2 == NULL || *message_data_len > pkt_len(pkt) ||
117 *message_data_len < 0)
118 return;
120 tprintf("Init Cookie (0x%lx)", ntohll(type_1_2->init_cookie));
122 dissect_mobility_options(pkt, message_data_len);
125 static void dissect_mobilityhdr_type_3_4(struct pkt_buff *pkt,
126 ssize_t *message_data_len)
128 struct tst_msg *type_3_4;
130 type_3_4 = (struct tst_msg *) pkt_pull(pkt, sizeof(*type_3_4));
131 *message_data_len -= sizeof(*type_3_4);
132 if (type_3_4 == NULL || *message_data_len > pkt_len(pkt) ||
133 *message_data_len < 0)
134 return;
136 tprintf("HN Index (%u) ", ntohs(type_3_4->nonce_index));
137 tprintf("Init Cookie (0x%lx) ", ntohll(type_3_4->init_cookie));
138 tprintf("Keygen Token (0x%lx)", ntohll(type_3_4->keygen_token));
140 dissect_mobility_options(pkt, message_data_len);
143 static void dissect_mobilityhdr_type_5(struct pkt_buff *pkt,
144 ssize_t *message_data_len)
146 struct bind_upd_msg *type_5;
148 type_5 = (struct bind_upd_msg *) pkt_pull(pkt, sizeof(*type_5));
149 *message_data_len -= sizeof(*type_5);
150 if (type_5 == NULL || *message_data_len > pkt_len(pkt) ||
151 *message_data_len < 0)
152 return;
154 tprintf("Sequence (0x%x) ", ntohs(type_5->sequence));
155 tprintf("A|H|L|K (0x%x) ", ntohs(type_5->ahlk_res) >> 12);
156 tprintf("Lifetime (%us)", ntohs(type_5->lifetime) * 4);
158 dissect_mobility_options(pkt, message_data_len);
161 static void dissect_mobilityhdr_type_6(struct pkt_buff *pkt,
162 ssize_t *message_data_len)
164 struct bind_ack_msg *type_6;
166 type_6 = (struct bind_ack_msg *) pkt_pull(pkt, sizeof(*type_6));
167 *message_data_len -= sizeof(*type_6);
168 if (type_6 == NULL || *message_data_len > pkt_len(pkt) ||
169 *message_data_len < 0)
170 return;
172 tprintf("Status (0x%x) ", type_6->status);
173 tprintf("K (%u) ", type_6->k_res >> 7);
174 tprintf("Sequence (0x%x)", ntohs(type_6->sequence));
175 tprintf("Lifetime (%us)", ntohs(type_6->lifetime) * 4);
177 dissect_mobility_options(pkt, message_data_len);
180 static void dissect_mobilityhdr_type_7(struct pkt_buff *pkt,
181 ssize_t *message_data_len)
183 char address[INET6_ADDRSTRLEN];
184 uint64_t addr;
185 struct bind_err_msg *type_7;
187 type_7 = (struct bind_err_msg *) pkt_pull(pkt, sizeof(*type_7));
188 *message_data_len -= sizeof(*type_7);
189 addr = ntohll(type_7->home_addr);
190 if (type_7 == NULL || *message_data_len > pkt_len(pkt) ||
191 *message_data_len < 0)
192 return;
194 tprintf("Status (0x%x) ", type_7->status);
195 tprintf("Home Addr (%s)",
196 inet_ntop(AF_INET6, &addr, address,
197 sizeof(address)));
199 dissect_mobility_options(pkt, message_data_len);
202 static void get_mh_type(struct pkt_buff *pkt, ssize_t *message_data_len,
203 uint8_t *mh_type)
205 switch (*mh_type) {
206 case BINDING_REFRESH_REQUEST_MESSAGE:
207 tprintf("Binding Refresh Request Message ");
208 dissect_mobilityhdr_type_0(pkt, message_data_len);
209 break;
210 case HOME_TEST_INIT_MESSAGE:
211 tprintf("Home Test Init Message ");
212 dissect_mobilityhdr_type_1_2(pkt, message_data_len);
213 break;
214 case CARE_OF_TEST_INIT_MESSAGE:
215 tprintf("Care-of Test Init Message ");
216 dissect_mobilityhdr_type_1_2(pkt, message_data_len);
217 break;
218 case HOME_TEST_MESSAGE:
219 tprintf("Binding Refresh Request Message ");
220 dissect_mobilityhdr_type_3_4(pkt, message_data_len);
221 break;
222 case CARE_OF_TEST_MESSAGE:
223 tprintf("Binding Refresh Request Message ");
224 dissect_mobilityhdr_type_3_4(pkt, message_data_len);
225 break;
226 case BINDING_UPDATE_MESSAGE:
227 tprintf("Binding Refresh Request Message ");
228 dissect_mobilityhdr_type_5(pkt, message_data_len);
229 break;
230 case BINDING_ACKNOWLEDGEMENT_MESSAGE:
231 tprintf("Binding Refresh Request Message ");
232 dissect_mobilityhdr_type_6(pkt, message_data_len);
233 break;
234 case BINDING_ERROR_MESSAGE:
235 tprintf("Binding Refresh Request Message ");
236 dissect_mobilityhdr_type_7(pkt, message_data_len);
237 break;
238 default:
239 tprintf("Type %u is unknown. Error", *mh_type);
243 static void mobility(struct pkt_buff *pkt)
245 uint16_t hdr_ext_len;
246 ssize_t message_data_len;
247 struct mobilityhdr *mobility;
249 mobility = (struct mobilityhdr *) pkt_pull(pkt, sizeof(*mobility));
250 if (mobility == NULL)
251 return;
253 /* Total Header Length in Bytes */
254 hdr_ext_len = (mobility->hdr_len + 1) * 8;
255 /* Total Message Data length in Bytes*/
256 message_data_len = (hdr_ext_len - sizeof(*mobility));
258 tprintf("\t [ Mobility ");
259 tprintf("NextHdr (%u), ", mobility->payload_proto);
260 if (message_data_len > pkt_len(pkt) || message_data_len < 0){
261 tprintf("HdrExtLen (%u, %u Bytes %s), ", mobility->hdr_len,
262 hdr_ext_len, colorize_start_full(black, red)
263 "invalid" colorize_end());
264 return;
266 tprintf("HdrExtLen (%u, %u Bytes), ", mobility->hdr_len,
267 hdr_ext_len);
268 tprintf("MH Type (%u), ", mobility->MH_type);
269 tprintf("Res (0x%x), ", mobility->reserved);
270 tprintf("Chks (0x%x), ", ntohs(mobility->chksum));
271 tprintf("MH Data ");
273 get_mh_type(pkt, &message_data_len, &mobility->MH_type);
275 tprintf(" ]\n");
277 if (message_data_len > pkt_len(pkt) || message_data_len < 0)
278 return;
280 pkt_pull(pkt, message_data_len);
281 pkt_set_proto(pkt, &eth_lay3, mobility->payload_proto);
284 static void mobility_less(struct pkt_buff *pkt)
286 uint16_t hdr_ext_len;
287 ssize_t message_data_len;
288 struct mobilityhdr *mobility;
290 mobility = (struct mobilityhdr *) pkt_pull(pkt, sizeof(*mobility));
291 if (mobility == NULL)
292 return;
294 /* Total Header Length in Bytes */
295 hdr_ext_len = (mobility->hdr_len + 1) * 8;
296 /* Total Message Data length in Bytes*/
297 message_data_len = (hdr_ext_len - sizeof(*mobility));
298 if (message_data_len > pkt_len(pkt) || message_data_len < 0)
299 return;
301 tprintf(" Mobility Type (%u), ", mobility->MH_type);
303 pkt_pull(pkt, message_data_len);
304 pkt_set_proto(pkt, &eth_lay3, mobility->payload_proto);
307 struct protocol ipv6_mobility_ops = {
308 .key = 0x87,
309 .print_full = mobility,
310 .print_less = mobility_less,