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8d91eee3 MW |
1 | /* |
2 | * Copyright (C) 2013 Martin Willi | |
19ef2aec TB |
3 | * |
4 | * Copyright (C) secunet Security Networks AG | |
8d91eee3 MW |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2 of the License, or (at your | |
9 | * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
13 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | * for more details. | |
15 | */ | |
16 | ||
ebb9362d MW |
17 | /* Windows 7, for some fwpmu.h functionality */ |
18 | #define _WIN32_WINNT 0x0601 | |
19 | ||
b1ba0a66 | 20 | #include "kernel_wfp_compat.h" |
8d91eee3 MW |
21 | #include "kernel_wfp_ipsec.h" |
22 | ||
23 | #include <daemon.h> | |
96ab7a80 MW |
24 | #include <threading/mutex.h> |
25 | #include <collections/array.h> | |
26 | #include <collections/hashtable.h> | |
af098b50 | 27 | #include <processing/jobs/callback_job.h> |
8d91eee3 | 28 | |
9d240b07 | 29 | #ifndef IPPROTO_IPIP |
a8142a17 | 30 | #define IPPROTO_IPIP 4 |
9d240b07 TB |
31 | #endif |
32 | #ifndef IPPROTO_IPV6 | |
a8142a17 | 33 | #define IPPROTO_IPV6 41 |
9d240b07 | 34 | #endif |
ebb9362d | 35 | |
8d91eee3 MW |
36 | typedef struct private_kernel_wfp_ipsec_t private_kernel_wfp_ipsec_t; |
37 | ||
38 | struct private_kernel_wfp_ipsec_t { | |
39 | ||
40 | /** | |
41 | * Public interface | |
42 | */ | |
43 | kernel_wfp_ipsec_t public; | |
96ab7a80 MW |
44 | |
45 | /** | |
46 | * Next SPI to allocate | |
47 | */ | |
48 | refcount_t nextspi; | |
49 | ||
bbe42a1f MW |
50 | /** |
51 | * Mix value to distribute SPI allocation randomly | |
52 | */ | |
b12c53ce | 53 | uint32_t mixspi; |
bbe42a1f | 54 | |
f206e069 MW |
55 | /** |
56 | * IKE bypass filters, as UINT64 filter LUID | |
57 | */ | |
58 | array_t *bypass; | |
59 | ||
96ab7a80 | 60 | /** |
f351d9ef | 61 | * Temporary SAD/SPD entries referenced reqid, as uintptr_t => entry_t |
96ab7a80 | 62 | */ |
f351d9ef | 63 | hashtable_t *tsas; |
96ab7a80 MW |
64 | |
65 | /** | |
f351d9ef | 66 | * SAD/SPD entries referenced by inbound SA, as sa_entry_t => entry_t |
96ab7a80 | 67 | */ |
f351d9ef MW |
68 | hashtable_t *isas; |
69 | ||
70 | /** | |
71 | * SAD/SPD entries referenced by outbound SA, as sa_entry_t => entry_t | |
72 | */ | |
73 | hashtable_t *osas; | |
96ab7a80 | 74 | |
b714746e MW |
75 | /** |
76 | * Installed routes, as route_t => route_t | |
77 | */ | |
78 | hashtable_t *routes; | |
79 | ||
c6f189e4 MW |
80 | /** |
81 | * Installed traps, as trap_t => trap_t | |
82 | */ | |
83 | hashtable_t *traps; | |
84 | ||
96ab7a80 MW |
85 | /** |
86 | * Mutex for accessing entries | |
87 | */ | |
88 | mutex_t *mutex; | |
ebb9362d MW |
89 | |
90 | /** | |
91 | * WFP session handle | |
92 | */ | |
93 | HANDLE handle; | |
f5ddda7f MW |
94 | |
95 | /** | |
96 | * Provider charon registers as | |
97 | */ | |
98 | FWPM_PROVIDER0 provider; | |
28683140 MW |
99 | |
100 | /** | |
101 | * Event handle | |
102 | */ | |
103 | HANDLE event; | |
8d91eee3 MW |
104 | }; |
105 | ||
96ab7a80 MW |
106 | /** |
107 | * Security association entry | |
108 | */ | |
109 | typedef struct { | |
110 | /** SPI for this SA */ | |
b12c53ce | 111 | uint32_t spi; |
f351d9ef | 112 | /** protocol, IPPROTO_ESP/IPPROTO_AH */ |
b12c53ce | 113 | uint8_t protocol; |
b3f90915 | 114 | /** hard lifetime of SA */ |
b12c53ce | 115 | uint32_t lifetime; |
96ab7a80 MW |
116 | /** destination host address for this SPI */ |
117 | host_t *dst; | |
96ab7a80 MW |
118 | struct { |
119 | /** algorithm */ | |
b12c53ce | 120 | uint16_t alg; |
96ab7a80 MW |
121 | /** key */ |
122 | chunk_t key; | |
123 | } integ, encr; | |
124 | } sa_entry_t; | |
125 | ||
96ab7a80 MW |
126 | /** |
127 | * Hash function for sas lookup table | |
128 | */ | |
129 | static u_int hash_sa(sa_entry_t *key) | |
130 | { | |
131 | return chunk_hash_inc(chunk_from_thing(key->spi), | |
132 | chunk_hash(key->dst->get_address(key->dst))); | |
133 | } | |
134 | ||
135 | /** | |
136 | * equals function for sas lookup table | |
137 | */ | |
138 | static bool equals_sa(sa_entry_t *a, sa_entry_t *b) | |
139 | { | |
140 | return a->spi == b->spi && a->dst->ip_equals(a->dst, b->dst); | |
141 | } | |
142 | ||
143 | /** | |
144 | * Security policy entry | |
145 | */ | |
146 | typedef struct { | |
147 | /** policy source addresses */ | |
148 | traffic_selector_t *src; | |
b3ab7a48 | 149 | /** policy destination addresses */ |
96ab7a80 | 150 | traffic_selector_t *dst; |
4b512803 | 151 | /** WFP allocated LUID for inbound filter ID */ |
b12c53ce | 152 | uint64_t policy_in; |
4b512803 | 153 | /** WFP allocated LUID for outbound filter ID */ |
b12c53ce | 154 | uint64_t policy_out; |
4b512803 | 155 | /** WFP allocated LUID for forward inbound filter ID, tunnel mode only */ |
b12c53ce | 156 | uint64_t policy_fwd_in; |
4b512803 | 157 | /** WFP allocated LUID for forward outbound filter ID, tunnel mode only */ |
b12c53ce | 158 | uint64_t policy_fwd_out; |
4b512803 MW |
159 | /** have installed a route for it? */ |
160 | bool route; | |
96ab7a80 MW |
161 | } sp_entry_t; |
162 | ||
163 | /** | |
164 | * Destroy an SP entry | |
165 | */ | |
166 | static void sp_entry_destroy(sp_entry_t *sp) | |
167 | { | |
168 | sp->src->destroy(sp->src); | |
169 | sp->dst->destroy(sp->dst); | |
170 | free(sp); | |
171 | } | |
172 | ||
173 | /** | |
174 | * Collection of SA/SP database entries for a reqid | |
175 | */ | |
176 | typedef struct { | |
177 | /** reqid of entry */ | |
b12c53ce | 178 | uint32_t reqid; |
96ab7a80 MW |
179 | /** outer address on local host */ |
180 | host_t *local; | |
181 | /** outer address on remote host */ | |
182 | host_t *remote; | |
f351d9ef MW |
183 | /** inbound SA entry */ |
184 | sa_entry_t isa; | |
185 | /** outbound SA entry */ | |
186 | sa_entry_t osa; | |
187 | /** associated (outbound) policies, as sp_entry_t* */ | |
96ab7a80 | 188 | array_t *sps; |
96ab7a80 MW |
189 | /** IPsec mode, tunnel|transport */ |
190 | ipsec_mode_t mode; | |
191 | /** UDP encapsulation */ | |
192 | bool encap; | |
1678f0a9 | 193 | /** provider context, for tunnel mode only */ |
b12c53ce | 194 | uint64_t provider; |
149fc48e | 195 | /** WFP allocated LUID for SA context */ |
b12c53ce | 196 | uint64_t sa_id; |
e1a44831 | 197 | /** WFP allocated LUID for tunnel mode IP-IPv4 inbound filter */ |
b12c53ce | 198 | uint64_t ip_ipv4_in; |
e1a44831 | 199 | /** WFP allocated LUID for tunnel mode IP-IPv4 outbound filter */ |
b12c53ce | 200 | uint64_t ip_ipv4_out; |
e1a44831 | 201 | /** WFP allocated LUID for tunnel mode IP-IPv6 inbound filter */ |
b12c53ce | 202 | uint64_t ip_ipv6_in; |
e1a44831 | 203 | /** WFP allocated LUID for tunnel mode IP-IPv6 outbound filter */ |
b12c53ce | 204 | uint64_t ip_ipv6_out; |
96ab7a80 MW |
205 | } entry_t; |
206 | ||
b714746e MW |
207 | /** |
208 | * Installed route | |
209 | */ | |
210 | typedef struct { | |
211 | /** destination net of route */ | |
212 | host_t *dst; | |
213 | /** prefix length of dst */ | |
b12c53ce | 214 | uint8_t mask; |
b714746e MW |
215 | /** source address for route */ |
216 | host_t *src; | |
217 | /** gateway of route, NULL if directly attached */ | |
218 | host_t *gtw; | |
219 | /** references for route */ | |
220 | u_int refs; | |
221 | } route_t; | |
222 | ||
223 | /** | |
224 | * Destroy a route_t | |
225 | */ | |
226 | static void destroy_route(route_t *this) | |
227 | { | |
228 | this->dst->destroy(this->dst); | |
229 | this->src->destroy(this->src); | |
230 | DESTROY_IF(this->gtw); | |
231 | free(this); | |
232 | } | |
233 | ||
234 | /** | |
235 | * Hashtable equals function for routes | |
236 | */ | |
237 | static bool equals_route(route_t *a, route_t *b) | |
238 | { | |
239 | return a->mask == b->mask && | |
240 | a->dst->ip_equals(a->dst, b->dst) && | |
241 | a->src->ip_equals(a->src, b->src); | |
242 | } | |
243 | ||
244 | /** | |
245 | * Hashtable hash function for routes | |
246 | */ | |
247 | static u_int hash_route(route_t *route) | |
248 | { | |
249 | return chunk_hash_inc(route->src->get_address(route->src), | |
250 | chunk_hash_inc(route->dst->get_address(route->dst), route->mask)); | |
251 | } | |
252 | ||
253 | /** forward declaration */ | |
254 | static bool manage_routes(private_kernel_wfp_ipsec_t *this, entry_t *entry, | |
255 | bool add); | |
256 | ||
4a8b8568 MW |
257 | /** |
258 | * Remove policies associated to an entry from kernel | |
259 | */ | |
260 | static void cleanup_policies(private_kernel_wfp_ipsec_t *this, entry_t *entry) | |
261 | { | |
4b512803 MW |
262 | enumerator_t *enumerator; |
263 | sp_entry_t *sp; | |
264 | ||
b714746e MW |
265 | if (entry->mode == MODE_TUNNEL) |
266 | { | |
267 | manage_routes(this, entry, FALSE); | |
4b512803 MW |
268 | } |
269 | ||
270 | enumerator = array_create_enumerator(entry->sps); | |
271 | while (enumerator->enumerate(enumerator, &sp)) | |
272 | { | |
273 | if (sp->policy_in) | |
6de78870 | 274 | { |
4b512803 MW |
275 | FwpmFilterDeleteById0(this->handle, sp->policy_in); |
276 | sp->policy_in = 0; | |
6de78870 | 277 | } |
4b512803 | 278 | if (sp->policy_out) |
6de78870 | 279 | { |
4b512803 MW |
280 | FwpmFilterDeleteById0(this->handle, sp->policy_out); |
281 | sp->policy_out = 0; | |
282 | } | |
283 | if (sp->policy_fwd_in) | |
284 | { | |
285 | FwpmFilterDeleteById0(this->handle, sp->policy_fwd_in); | |
286 | sp->policy_fwd_in = 0; | |
287 | } | |
288 | if (sp->policy_fwd_out) | |
289 | { | |
290 | FwpmFilterDeleteById0(this->handle, sp->policy_fwd_out); | |
291 | sp->policy_fwd_out = 0; | |
6de78870 | 292 | } |
b714746e | 293 | } |
4b512803 | 294 | enumerator->destroy(enumerator); |
4a8b8568 MW |
295 | } |
296 | ||
297 | /** | |
298 | * Destroy a SA/SP entry set | |
299 | */ | |
300 | static void entry_destroy(private_kernel_wfp_ipsec_t *this, entry_t *entry) | |
301 | { | |
e1a44831 | 302 | if (entry->ip_ipv4_in) |
a8142a17 | 303 | { |
e1a44831 | 304 | FwpmFilterDeleteById0(this->handle, entry->ip_ipv4_in); |
a8142a17 | 305 | } |
e1a44831 | 306 | if (entry->ip_ipv4_out) |
a8142a17 | 307 | { |
e1a44831 MW |
308 | FwpmFilterDeleteById0(this->handle, entry->ip_ipv4_out); |
309 | } | |
310 | if (entry->ip_ipv6_in) | |
311 | { | |
312 | FwpmFilterDeleteById0(this->handle, entry->ip_ipv6_in); | |
313 | } | |
314 | if (entry->ip_ipv6_out) | |
315 | { | |
316 | FwpmFilterDeleteById0(this->handle, entry->ip_ipv6_out); | |
a8142a17 | 317 | } |
4a8b8568 MW |
318 | if (entry->sa_id) |
319 | { | |
320 | IPsecSaContextDeleteById0(this->handle, entry->sa_id); | |
149fc48e | 321 | } |
1678f0a9 MW |
322 | if (entry->provider) |
323 | { | |
324 | FwpmProviderContextDeleteById0(this->handle, entry->provider); | |
325 | } | |
4a8b8568 | 326 | cleanup_policies(this, entry); |
f351d9ef | 327 | array_destroy_function(entry->sps, (void*)sp_entry_destroy, NULL); |
96ab7a80 MW |
328 | entry->local->destroy(entry->local); |
329 | entry->remote->destroy(entry->remote); | |
f351d9ef MW |
330 | chunk_clear(&entry->isa.integ.key); |
331 | chunk_clear(&entry->isa.encr.key); | |
332 | chunk_clear(&entry->osa.integ.key); | |
333 | chunk_clear(&entry->osa.encr.key); | |
96ab7a80 MW |
334 | free(entry); |
335 | } | |
336 | ||
149fc48e MW |
337 | /** |
338 | * Append/Realloc a filter condition to an existing condition set | |
339 | */ | |
340 | static FWPM_FILTER_CONDITION0 *append_condition(FWPM_FILTER_CONDITION0 *conds[], | |
341 | int *count) | |
342 | { | |
343 | FWPM_FILTER_CONDITION0 *cond; | |
344 | ||
345 | (*count)++; | |
346 | *conds = realloc(*conds, *count * sizeof(*cond)); | |
347 | cond = *conds + *count - 1; | |
348 | memset(cond, 0, sizeof(*cond)); | |
349 | ||
350 | return cond; | |
351 | } | |
352 | ||
353 | /** | |
354 | * Convert an IPv4 prefix to a host order subnet mask | |
355 | */ | |
b12c53ce | 356 | static uint32_t prefix2mask(uint8_t prefix) |
149fc48e | 357 | { |
b12c53ce | 358 | uint8_t netmask[4] = {}; |
149fc48e MW |
359 | int i; |
360 | ||
361 | for (i = 0; i < sizeof(netmask); i++) | |
362 | { | |
363 | if (prefix < 8) | |
364 | { | |
365 | netmask[i] = 0xFF << (8 - prefix); | |
366 | break; | |
367 | } | |
368 | netmask[i] = 0xFF; | |
369 | prefix -= 8; | |
370 | } | |
371 | return untoh32(netmask); | |
372 | } | |
373 | ||
374 | /** | |
375 | * Convert a 16-bit range to a WFP condition | |
376 | */ | |
377 | static void range2cond(FWPM_FILTER_CONDITION0 *cond, | |
b12c53ce | 378 | uint16_t from, uint16_t to) |
149fc48e MW |
379 | { |
380 | if (from == to) | |
381 | { | |
382 | cond->matchType = FWP_MATCH_EQUAL; | |
383 | cond->conditionValue.type = FWP_UINT16; | |
384 | cond->conditionValue.uint16 = from; | |
385 | } | |
386 | else | |
387 | { | |
388 | cond->matchType = FWP_MATCH_RANGE; | |
389 | cond->conditionValue.type = FWP_RANGE_TYPE; | |
390 | cond->conditionValue.rangeValue = calloc(1, sizeof(FWP_RANGE0)); | |
391 | cond->conditionValue.rangeValue->valueLow.type = FWP_UINT16; | |
392 | cond->conditionValue.rangeValue->valueLow.uint16 = from; | |
393 | cond->conditionValue.rangeValue->valueHigh.type = FWP_UINT16; | |
394 | cond->conditionValue.rangeValue->valueHigh.uint16 = to; | |
395 | } | |
396 | } | |
397 | ||
398 | /** | |
399 | * (Re-)allocate filter conditions for given local or remote traffic selector | |
400 | */ | |
6de78870 | 401 | static bool ts2condition(traffic_selector_t *ts, const GUID *target, |
149fc48e MW |
402 | FWPM_FILTER_CONDITION0 *conds[], int *count) |
403 | { | |
404 | FWPM_FILTER_CONDITION0 *cond; | |
405 | FWP_BYTE_ARRAY16 *addr; | |
406 | FWP_RANGE0 *range; | |
b12c53ce | 407 | uint16_t from_port, to_port; |
149fc48e | 408 | void *from, *to; |
b12c53ce | 409 | uint8_t proto; |
149fc48e | 410 | host_t *net; |
b12c53ce | 411 | uint8_t prefix; |
149fc48e MW |
412 | |
413 | from = ts->get_from_address(ts).ptr; | |
414 | to = ts->get_to_address(ts).ptr; | |
415 | from_port = ts->get_from_port(ts); | |
416 | to_port = ts->get_to_port(ts); | |
417 | ||
418 | cond = append_condition(conds, count); | |
6de78870 | 419 | cond->fieldKey = *target; |
149fc48e MW |
420 | if (ts->is_host(ts, NULL)) |
421 | { | |
422 | cond->matchType = FWP_MATCH_EQUAL; | |
423 | switch (ts->get_type(ts)) | |
424 | { | |
425 | case TS_IPV4_ADDR_RANGE: | |
426 | cond->conditionValue.type = FWP_UINT32; | |
427 | cond->conditionValue.uint32 = untoh32(from); | |
428 | break; | |
429 | case TS_IPV6_ADDR_RANGE: | |
430 | cond->conditionValue.type = FWP_BYTE_ARRAY16_TYPE; | |
431 | cond->conditionValue.byteArray16 = addr = malloc(sizeof(*addr)); | |
432 | memcpy(addr, from, sizeof(*addr)); | |
433 | break; | |
434 | default: | |
435 | return FALSE; | |
436 | } | |
437 | } | |
438 | else if (ts->to_subnet(ts, &net, &prefix)) | |
439 | { | |
440 | FWP_V6_ADDR_AND_MASK *m6; | |
441 | FWP_V4_ADDR_AND_MASK *m4; | |
442 | ||
443 | cond->matchType = FWP_MATCH_EQUAL; | |
444 | switch (net->get_family(net)) | |
445 | { | |
446 | case AF_INET: | |
447 | cond->conditionValue.type = FWP_V4_ADDR_MASK; | |
448 | cond->conditionValue.v4AddrMask = m4 = calloc(1, sizeof(*m4)); | |
449 | m4->addr = untoh32(from); | |
450 | m4->mask = prefix2mask(prefix); | |
451 | break; | |
452 | case AF_INET6: | |
453 | cond->conditionValue.type = FWP_V6_ADDR_MASK; | |
454 | cond->conditionValue.v6AddrMask = m6 = calloc(1, sizeof(*m6)); | |
455 | memcpy(m6->addr, from, sizeof(m6->addr)); | |
456 | m6->prefixLength = prefix; | |
457 | break; | |
458 | default: | |
459 | net->destroy(net); | |
460 | return FALSE; | |
461 | } | |
462 | net->destroy(net); | |
463 | } | |
464 | else | |
465 | { | |
466 | cond->matchType = FWP_MATCH_RANGE; | |
467 | cond->conditionValue.type = FWP_RANGE_TYPE; | |
468 | cond->conditionValue.rangeValue = range = calloc(1, sizeof(*range)); | |
469 | switch (ts->get_type(ts)) | |
470 | { | |
471 | case TS_IPV4_ADDR_RANGE: | |
472 | range->valueLow.type = FWP_UINT32; | |
473 | range->valueLow.uint32 = untoh32(from); | |
474 | range->valueHigh.type = FWP_UINT32; | |
475 | range->valueHigh.uint32 = untoh32(to); | |
476 | break; | |
477 | case TS_IPV6_ADDR_RANGE: | |
478 | range->valueLow.type = FWP_BYTE_ARRAY16_TYPE; | |
479 | range->valueLow.byteArray16 = addr = malloc(sizeof(*addr)); | |
480 | memcpy(addr, from, sizeof(*addr)); | |
481 | range->valueHigh.type = FWP_BYTE_ARRAY16_TYPE; | |
482 | range->valueHigh.byteArray16 = addr = malloc(sizeof(*addr)); | |
483 | memcpy(addr, to, sizeof(*addr)); | |
484 | break; | |
485 | default: | |
486 | return FALSE; | |
487 | } | |
488 | } | |
489 | ||
490 | proto = ts->get_protocol(ts); | |
6de78870 | 491 | if (proto && target == &FWPM_CONDITION_IP_LOCAL_ADDRESS) |
149fc48e MW |
492 | { |
493 | cond = append_condition(conds, count); | |
494 | cond->fieldKey = FWPM_CONDITION_IP_PROTOCOL; | |
495 | cond->matchType = FWP_MATCH_EQUAL; | |
496 | cond->conditionValue.type = FWP_UINT8; | |
497 | cond->conditionValue.uint8 = proto; | |
498 | } | |
499 | ||
500 | if (proto == IPPROTO_ICMP) | |
501 | { | |
6de78870 | 502 | if (target == &FWPM_CONDITION_IP_LOCAL_ADDRESS) |
149fc48e | 503 | { |
b12c53ce | 504 | uint8_t from_type, to_type, from_code, to_code; |
149fc48e MW |
505 | |
506 | from_type = traffic_selector_icmp_type(from_port); | |
507 | to_type = traffic_selector_icmp_type(to_port); | |
508 | from_code = traffic_selector_icmp_code(from_port); | |
509 | to_code = traffic_selector_icmp_code(to_port); | |
510 | ||
511 | if (from_type != 0 || to_type != 0xFF) | |
512 | { | |
513 | cond = append_condition(conds, count); | |
514 | cond->fieldKey = FWPM_CONDITION_ICMP_TYPE; | |
515 | range2cond(cond, from_type, to_type); | |
516 | } | |
517 | if (from_code != 0 || to_code != 0xFF) | |
518 | { | |
519 | cond = append_condition(conds, count); | |
520 | cond->fieldKey = FWPM_CONDITION_ICMP_CODE; | |
521 | range2cond(cond, from_code, to_code); | |
522 | } | |
523 | } | |
524 | } | |
525 | else if (from_port != 0 || to_port != 0xFFFF) | |
526 | { | |
6de78870 | 527 | if (target == &FWPM_CONDITION_IP_LOCAL_ADDRESS) |
149fc48e | 528 | { |
6de78870 | 529 | cond = append_condition(conds, count); |
149fc48e | 530 | cond->fieldKey = FWPM_CONDITION_IP_LOCAL_PORT; |
6de78870 | 531 | range2cond(cond, from_port, to_port); |
149fc48e | 532 | } |
6de78870 | 533 | if (target == &FWPM_CONDITION_IP_REMOTE_ADDRESS) |
149fc48e | 534 | { |
6de78870 | 535 | cond = append_condition(conds, count); |
149fc48e | 536 | cond->fieldKey = FWPM_CONDITION_IP_REMOTE_PORT; |
6de78870 | 537 | range2cond(cond, from_port, to_port); |
149fc48e | 538 | } |
149fc48e MW |
539 | } |
540 | return TRUE; | |
541 | } | |
542 | ||
543 | /** | |
544 | * Free memory associated to a single condition | |
545 | */ | |
546 | static void free_condition(FWP_DATA_TYPE type, void *value) | |
547 | { | |
548 | FWP_RANGE0 *range; | |
549 | ||
550 | switch (type) | |
551 | { | |
552 | case FWP_BYTE_ARRAY16_TYPE: | |
553 | case FWP_V4_ADDR_MASK: | |
554 | case FWP_V6_ADDR_MASK: | |
555 | free(value); | |
556 | break; | |
557 | case FWP_RANGE_TYPE: | |
558 | range = value; | |
559 | free_condition(range->valueLow.type, range->valueLow.sd); | |
560 | free_condition(range->valueHigh.type, range->valueHigh.sd); | |
561 | free(range); | |
562 | break; | |
563 | default: | |
564 | break; | |
565 | } | |
566 | } | |
567 | ||
568 | /** | |
569 | * Free memory used by a set of conditions | |
570 | */ | |
571 | static void free_conditions(FWPM_FILTER_CONDITION0 *conds, int count) | |
572 | { | |
573 | int i; | |
574 | ||
575 | for (i = 0; i < count; i++) | |
576 | { | |
577 | free_condition(conds[i].conditionValue.type, conds[i].conditionValue.sd); | |
578 | } | |
579 | free(conds); | |
580 | } | |
581 | ||
6de78870 MW |
582 | /** |
583 | * Find the callout GUID for given parameters | |
584 | */ | |
585 | static bool find_callout(bool tunnel, bool v6, bool inbound, bool forward, | |
a8142a17 | 586 | bool ale, GUID *layer, GUID *sublayer, GUID *callout) |
6de78870 MW |
587 | { |
588 | struct { | |
589 | bool tunnel; | |
590 | bool v6; | |
591 | bool inbound; | |
592 | bool forward; | |
a8142a17 | 593 | bool ale; |
6de78870 | 594 | const GUID *layer; |
4a8ba369 | 595 | const GUID *sublayer; |
6de78870 MW |
596 | const GUID *callout; |
597 | } map[] = { | |
a8142a17 MW |
598 | { 0, 0, 0, 0, 0, &FWPM_LAYER_OUTBOUND_TRANSPORT_V4, NULL, |
599 | &FWPM_CALLOUT_IPSEC_OUTBOUND_TRANSPORT_V4 }, | |
600 | { 0, 0, 1, 0, 0, &FWPM_LAYER_INBOUND_TRANSPORT_V4, NULL, | |
601 | &FWPM_CALLOUT_IPSEC_INBOUND_TRANSPORT_V4 }, | |
602 | { 0, 1, 0, 0, 0, &FWPM_LAYER_OUTBOUND_TRANSPORT_V6, NULL, | |
603 | &FWPM_CALLOUT_IPSEC_OUTBOUND_TRANSPORT_V6 }, | |
604 | { 0, 1, 1, 0, 0, &FWPM_LAYER_INBOUND_TRANSPORT_V6, NULL, | |
605 | &FWPM_CALLOUT_IPSEC_INBOUND_TRANSPORT_V6 }, | |
606 | { 1, 0, 0, 0, 0, &FWPM_LAYER_OUTBOUND_TRANSPORT_V4, | |
607 | &FWPM_SUBLAYER_IPSEC_TUNNEL, | |
608 | &FWPM_CALLOUT_IPSEC_OUTBOUND_TUNNEL_V4 }, | |
609 | { 1, 0, 0, 1, 0, &FWPM_LAYER_IPFORWARD_V4, | |
610 | &FWPM_SUBLAYER_IPSEC_FORWARD_OUTBOUND_TUNNEL, | |
611 | &FWPM_CALLOUT_IPSEC_FORWARD_OUTBOUND_TUNNEL_V4 }, | |
612 | { 1, 0, 1, 0, 0, &FWPM_LAYER_INBOUND_TRANSPORT_V4, | |
613 | &FWPM_SUBLAYER_IPSEC_TUNNEL, | |
614 | &FWPM_CALLOUT_IPSEC_INBOUND_TUNNEL_V4 }, | |
615 | { 1, 0, 1, 1, 0, &FWPM_LAYER_IPFORWARD_V4, | |
616 | &FWPM_SUBLAYER_IPSEC_TUNNEL, | |
617 | &FWPM_CALLOUT_IPSEC_FORWARD_INBOUND_TUNNEL_V4 }, | |
618 | { 1, 0, 0, 0, 1, &FWPM_LAYER_ALE_AUTH_CONNECT_V4, NULL, | |
619 | &FWPM_CALLOUT_IPSEC_ALE_CONNECT_V4 }, | |
620 | { 1, 0, 1, 0, 1, &FWPM_LAYER_ALE_AUTH_RECV_ACCEPT_V4, NULL, | |
621 | &FWPM_CALLOUT_IPSEC_INBOUND_TUNNEL_ALE_ACCEPT_V4}, | |
622 | { 1, 1, 0, 0, 0, &FWPM_LAYER_OUTBOUND_TRANSPORT_V6, | |
623 | &FWPM_SUBLAYER_IPSEC_TUNNEL, | |
624 | &FWPM_CALLOUT_IPSEC_OUTBOUND_TUNNEL_V6 }, | |
625 | { 1, 1, 0, 1, 0, &FWPM_LAYER_IPFORWARD_V6, | |
626 | &FWPM_SUBLAYER_IPSEC_FORWARD_OUTBOUND_TUNNEL, | |
627 | &FWPM_CALLOUT_IPSEC_FORWARD_OUTBOUND_TUNNEL_V6 }, | |
628 | { 1, 1, 1, 0, 0, &FWPM_LAYER_INBOUND_TRANSPORT_V6, | |
629 | &FWPM_SUBLAYER_IPSEC_TUNNEL, | |
630 | &FWPM_CALLOUT_IPSEC_INBOUND_TUNNEL_V6 }, | |
631 | { 1, 1, 1, 1, 0, &FWPM_LAYER_IPFORWARD_V6, | |
632 | &FWPM_SUBLAYER_IPSEC_TUNNEL, | |
633 | &FWPM_CALLOUT_IPSEC_FORWARD_INBOUND_TUNNEL_V6 }, | |
634 | { 1, 1, 0, 0, 1, &FWPM_LAYER_ALE_AUTH_CONNECT_V6, NULL, | |
635 | &FWPM_CALLOUT_IPSEC_ALE_CONNECT_V6 }, | |
636 | { 1, 1, 1, 0, 1, &FWPM_LAYER_ALE_AUTH_RECV_ACCEPT_V6, NULL, | |
637 | &FWPM_CALLOUT_IPSEC_INBOUND_TUNNEL_ALE_ACCEPT_V6}, | |
6de78870 MW |
638 | }; |
639 | int i; | |
640 | ||
641 | for (i = 0; i < countof(map); i++) | |
642 | { | |
643 | if (tunnel == map[i].tunnel && | |
644 | v6 == map[i].v6 && | |
645 | inbound == map[i].inbound && | |
a8142a17 MW |
646 | forward == map[i].forward && |
647 | ale == map[i].ale) | |
6de78870 MW |
648 | { |
649 | *callout = *map[i].callout; | |
650 | *layer = *map[i].layer; | |
4a8ba369 MW |
651 | if (map[i].sublayer) |
652 | { | |
653 | *sublayer = *map[i].sublayer; | |
654 | } | |
6de78870 MW |
655 | return TRUE; |
656 | } | |
657 | } | |
658 | return FALSE; | |
659 | } | |
660 | ||
149fc48e | 661 | /** |
1678f0a9 | 662 | * Install a single policy in to the kernel |
149fc48e | 663 | */ |
6de78870 MW |
664 | static bool install_sp(private_kernel_wfp_ipsec_t *this, sp_entry_t *sp, |
665 | GUID *context, bool inbound, bool fwd, UINT64 *filter_id) | |
149fc48e MW |
666 | { |
667 | FWPM_FILTER_CONDITION0 *conds = NULL; | |
149fc48e | 668 | traffic_selector_t *local, *remote; |
6de78870 MW |
669 | const GUID *ltarget, *rtarget; |
670 | int count = 0; | |
671 | bool v6; | |
149fc48e MW |
672 | DWORD res; |
673 | FWPM_FILTER0 filter = { | |
674 | .displayData = { | |
1678f0a9 | 675 | .name = L"charon IPsec policy", |
149fc48e MW |
676 | }, |
677 | .action = { | |
678 | .type = FWP_ACTION_CALLOUT_TERMINATING, | |
149fc48e | 679 | }, |
149fc48e MW |
680 | }; |
681 | ||
1678f0a9 MW |
682 | if (context) |
683 | { | |
1678f0a9 | 684 | filter.flags |= FWPM_FILTER_FLAG_HAS_PROVIDER_CONTEXT; |
6de78870 MW |
685 | filter.providerKey = (GUID*)&this->provider.providerKey; |
686 | filter.providerContextKey = *context; | |
687 | } | |
688 | ||
689 | v6 = sp->src->get_type(sp->src) == TS_IPV6_ADDR_RANGE; | |
a8142a17 | 690 | if (!find_callout(context != NULL, v6, inbound, fwd, FALSE, |
4a8ba369 MW |
691 | &filter.layerKey, &filter.subLayerKey, |
692 | &filter.action.calloutKey)) | |
6de78870 MW |
693 | { |
694 | return FALSE; | |
695 | } | |
696 | ||
697 | if (inbound && fwd) | |
698 | { | |
699 | local = sp->dst; | |
700 | remote = sp->src; | |
1678f0a9 MW |
701 | } |
702 | else | |
703 | { | |
6de78870 MW |
704 | local = sp->src; |
705 | remote = sp->dst; | |
706 | } | |
707 | if (fwd) | |
708 | { | |
709 | ltarget = &FWPM_CONDITION_IP_SOURCE_ADDRESS; | |
710 | rtarget = &FWPM_CONDITION_IP_DESTINATION_ADDRESS; | |
711 | } | |
712 | else | |
713 | { | |
714 | ltarget = &FWPM_CONDITION_IP_LOCAL_ADDRESS; | |
715 | rtarget = &FWPM_CONDITION_IP_REMOTE_ADDRESS; | |
1678f0a9 | 716 | } |
6de78870 MW |
717 | if (!ts2condition(local, ltarget, &conds, &count) || |
718 | !ts2condition(remote, rtarget, &conds, &count)) | |
719 | { | |
720 | free_conditions(conds, count); | |
721 | return FALSE; | |
722 | } | |
723 | ||
724 | filter.numFilterConditions = count; | |
725 | filter.filterCondition = conds; | |
726 | ||
727 | res = FwpmFilterAdd0(this->handle, &filter, NULL, filter_id); | |
728 | free_conditions(conds, count); | |
729 | if (res != ERROR_SUCCESS) | |
730 | { | |
a8142a17 MW |
731 | DBG1(DBG_KNL, "installing IPv%d %s%sbound %s WFP filter failed: 0x%08x", |
732 | v6 ? 6 : 4, fwd ? "forward " : "", inbound ? "in" : "out", | |
733 | context ? "tunnel" : "transport", res); | |
734 | return FALSE; | |
735 | } | |
736 | return TRUE; | |
737 | } | |
738 | ||
739 | /** | |
740 | * Install an IP-IP allow filter for SA specific hosts | |
741 | */ | |
742 | static bool install_ipip_ale(private_kernel_wfp_ipsec_t *this, | |
743 | host_t *local, host_t *remote, GUID *context, | |
b12c53ce | 744 | bool inbound, int proto, uint64_t *filter_id) |
a8142a17 MW |
745 | { |
746 | traffic_selector_t *lts, *rts; | |
747 | FWPM_FILTER_CONDITION0 *conds = NULL; | |
748 | int count = 0; | |
749 | bool v6; | |
750 | DWORD res; | |
751 | FWPM_FILTER0 filter = { | |
752 | .displayData = { | |
753 | .name = L"charon IPsec IP-in-IP ALE policy", | |
754 | }, | |
755 | .action = { | |
756 | .type = FWP_ACTION_CALLOUT_TERMINATING, | |
757 | }, | |
a8142a17 MW |
758 | }; |
759 | ||
e1a44831 MW |
760 | if (context) |
761 | { | |
762 | filter.flags |= FWPM_FILTER_FLAG_HAS_PROVIDER_CONTEXT; | |
763 | filter.providerKey = (GUID*)&this->provider.providerKey; | |
764 | filter.providerContextKey = *context; | |
765 | } | |
766 | ||
a8142a17 | 767 | v6 = local->get_family(local) == AF_INET6; |
e1a44831 | 768 | if (!find_callout(TRUE, v6, inbound, FALSE, TRUE, &filter.layerKey, |
a8142a17 MW |
769 | &filter.subLayerKey, &filter.action.calloutKey)) |
770 | { | |
771 | return FALSE; | |
772 | } | |
773 | ||
774 | lts = traffic_selector_create_from_subnet(local->clone(local), | |
775 | v6 ? 128 : 32 , proto, 0, 65535); | |
776 | rts = traffic_selector_create_from_subnet(remote->clone(remote), | |
777 | v6 ? 128 : 32 , proto, 0, 65535); | |
778 | if (!ts2condition(lts, &FWPM_CONDITION_IP_LOCAL_ADDRESS, &conds, &count) || | |
779 | !ts2condition(rts, &FWPM_CONDITION_IP_REMOTE_ADDRESS, &conds, &count)) | |
780 | { | |
781 | free_conditions(conds, count); | |
782 | lts->destroy(lts); | |
783 | rts->destroy(rts); | |
784 | return FALSE; | |
785 | } | |
786 | lts->destroy(lts); | |
787 | rts->destroy(rts); | |
788 | ||
789 | filter.numFilterConditions = count; | |
790 | filter.filterCondition = conds; | |
791 | ||
792 | res = FwpmFilterAdd0(this->handle, &filter, NULL, filter_id); | |
793 | free_conditions(conds, count); | |
794 | if (res != ERROR_SUCCESS) | |
795 | { | |
e1a44831 MW |
796 | DBG1(DBG_KNL, "installing IP-IPv%d %s ALE WFP filter failed: 0x%08x", |
797 | v6 ? 6 : 4, inbound ? "inbound" : "outbound", res); | |
6de78870 MW |
798 | return FALSE; |
799 | } | |
800 | return TRUE; | |
801 | } | |
802 | ||
803 | /** | |
804 | * Install a set of policies in to the kernel | |
805 | */ | |
806 | static bool install_sps(private_kernel_wfp_ipsec_t *this, | |
807 | entry_t *entry, GUID *context) | |
808 | { | |
809 | enumerator_t *enumerator; | |
810 | sp_entry_t *sp; | |
a8142a17 | 811 | bool has_v4 = FALSE, has_v6 = FALSE; |
1678f0a9 | 812 | |
149fc48e MW |
813 | enumerator = array_create_enumerator(entry->sps); |
814 | while (enumerator->enumerate(enumerator, &sp)) | |
815 | { | |
a8142a17 MW |
816 | switch (sp->src->get_type(sp->src)) |
817 | { | |
818 | case TS_IPV4_ADDR_RANGE: | |
819 | has_v4 = TRUE; | |
820 | break; | |
821 | case TS_IPV6_ADDR_RANGE: | |
822 | has_v6 = TRUE; | |
823 | break; | |
d71d181d TB |
824 | default: |
825 | continue; | |
a8142a17 MW |
826 | } |
827 | ||
6de78870 | 828 | /* inbound policy */ |
4b512803 | 829 | if (!install_sp(this, sp, context, TRUE, FALSE, &sp->policy_in)) |
149fc48e | 830 | { |
6de78870 MW |
831 | enumerator->destroy(enumerator); |
832 | return FALSE; | |
149fc48e | 833 | } |
6de78870 | 834 | /* outbound policy */ |
4b512803 | 835 | if (!install_sp(this, sp, context, FALSE, FALSE, &sp->policy_out)) |
149fc48e | 836 | { |
149fc48e MW |
837 | enumerator->destroy(enumerator); |
838 | return FALSE; | |
839 | } | |
a8142a17 | 840 | |
6de78870 MW |
841 | if (context) |
842 | { | |
843 | if (!sp->src->is_host(sp->src, entry->local) || | |
844 | !sp->dst->is_host(sp->dst, entry->remote)) | |
845 | { | |
846 | /* inbound forward policy, from decapsulation */ | |
a8142a17 MW |
847 | if (!install_sp(this, sp, context, TRUE, TRUE, |
848 | &sp->policy_fwd_in)) | |
6de78870 MW |
849 | { |
850 | enumerator->destroy(enumerator); | |
851 | return FALSE; | |
852 | } | |
853 | /* outbound forward policy, to encapsulate */ | |
a8142a17 MW |
854 | if (!install_sp(this, sp, context, FALSE, TRUE, |
855 | &sp->policy_fwd_out)) | |
6de78870 MW |
856 | { |
857 | enumerator->destroy(enumerator); | |
858 | return FALSE; | |
859 | } | |
860 | } | |
861 | } | |
149fc48e MW |
862 | } |
863 | enumerator->destroy(enumerator); | |
864 | ||
a8142a17 MW |
865 | if (context) |
866 | { | |
867 | /* In tunnel mode, Windows does firewall filtering on decrypted but | |
868 | * non-unwrapped packets: It sees them as IP-in-IP packets. When using | |
869 | * a default-drop policy, we need to allow such packets explicitly. */ | |
870 | if (has_v4) | |
871 | { | |
872 | if (!install_ipip_ale(this, entry->local, entry->remote, context, | |
e1a44831 MW |
873 | TRUE, IPPROTO_IPIP, &entry->ip_ipv4_in)) |
874 | { | |
875 | return FALSE; | |
876 | } | |
877 | if (!install_ipip_ale(this, entry->local, entry->remote, NULL, | |
878 | FALSE, IPPROTO_IPIP, &entry->ip_ipv4_out)) | |
a8142a17 MW |
879 | { |
880 | return FALSE; | |
881 | } | |
882 | } | |
883 | if (has_v6) | |
884 | { | |
885 | if (!install_ipip_ale(this, entry->local, entry->remote, context, | |
e1a44831 MW |
886 | TRUE, IPPROTO_IPV6, &entry->ip_ipv6_in)) |
887 | { | |
888 | return FALSE; | |
889 | } | |
890 | if (!install_ipip_ale(this, entry->local, entry->remote, NULL, | |
891 | FALSE, IPPROTO_IPV6, &entry->ip_ipv6_out)) | |
a8142a17 MW |
892 | { |
893 | return FALSE; | |
894 | } | |
895 | } | |
896 | } | |
149fc48e MW |
897 | return TRUE; |
898 | } | |
899 | ||
900 | /** | |
901 | * Convert a chunk_t to a WFP FWP_BYTE_BLOB | |
902 | */ | |
903 | static inline FWP_BYTE_BLOB chunk2blob(chunk_t chunk) | |
904 | { | |
905 | return (FWP_BYTE_BLOB){ | |
906 | .size = chunk.len, | |
907 | .data = chunk.ptr, | |
908 | }; | |
909 | } | |
910 | ||
911 | /** | |
912 | * Convert an integrity_algorithm_t to a WFP IPSEC_AUTH_TRANFORM_ID0 | |
913 | */ | |
914 | static bool alg2auth(integrity_algorithm_t alg, | |
915 | IPSEC_SA_AUTH_INFORMATION0 *info) | |
916 | { | |
917 | struct { | |
918 | integrity_algorithm_t alg; | |
919 | IPSEC_AUTH_TRANSFORM_ID0 transform; | |
920 | } map[] = { | |
921 | { AUTH_HMAC_MD5_96, IPSEC_AUTH_TRANSFORM_ID_HMAC_MD5_96 }, | |
922 | { AUTH_HMAC_SHA1_96, IPSEC_AUTH_TRANSFORM_ID_HMAC_SHA_1_96 }, | |
923 | { AUTH_HMAC_SHA2_256_128, IPSEC_AUTH_TRANSFORM_ID_HMAC_SHA_256_128}, | |
924 | { AUTH_AES_128_GMAC, IPSEC_AUTH_TRANSFORM_ID_GCM_AES_128 }, | |
925 | { AUTH_AES_192_GMAC, IPSEC_AUTH_TRANSFORM_ID_GCM_AES_192 }, | |
926 | { AUTH_AES_256_GMAC, IPSEC_AUTH_TRANSFORM_ID_GCM_AES_256 }, | |
927 | }; | |
928 | int i; | |
929 | ||
930 | for (i = 0; i < countof(map); i++) | |
931 | { | |
932 | if (map[i].alg == alg) | |
933 | { | |
934 | info->authTransform.authTransformId = map[i].transform; | |
935 | return TRUE; | |
936 | } | |
937 | } | |
938 | return FALSE; | |
939 | } | |
940 | ||
941 | /** | |
942 | * Convert an encryption_algorithm_t to a WFP IPSEC_CIPHER_TRANFORM_ID0 | |
943 | */ | |
944 | static bool alg2cipher(encryption_algorithm_t alg, int keylen, | |
945 | IPSEC_SA_CIPHER_INFORMATION0 *info) | |
946 | { | |
947 | struct { | |
948 | encryption_algorithm_t alg; | |
949 | int keylen; | |
950 | IPSEC_CIPHER_TRANSFORM_ID0 transform; | |
951 | } map[] = { | |
952 | { ENCR_DES, 8, IPSEC_CIPHER_TRANSFORM_ID_CBC_DES }, | |
953 | { ENCR_3DES, 24, IPSEC_CIPHER_TRANSFORM_ID_CBC_3DES }, | |
954 | { ENCR_AES_CBC, 16, IPSEC_CIPHER_TRANSFORM_ID_AES_128 }, | |
955 | { ENCR_AES_CBC, 24, IPSEC_CIPHER_TRANSFORM_ID_AES_192 }, | |
956 | { ENCR_AES_CBC, 32, IPSEC_CIPHER_TRANSFORM_ID_AES_256 }, | |
957 | { ENCR_AES_GCM_ICV16, 20, IPSEC_CIPHER_TRANSFORM_ID_GCM_AES_128 }, | |
958 | { ENCR_AES_GCM_ICV16, 28, IPSEC_CIPHER_TRANSFORM_ID_GCM_AES_192 }, | |
959 | { ENCR_AES_GCM_ICV16, 36, IPSEC_CIPHER_TRANSFORM_ID_GCM_AES_256 }, | |
960 | }; | |
961 | int i; | |
962 | ||
963 | for (i = 0; i < countof(map); i++) | |
964 | { | |
965 | if (map[i].alg == alg && map[i].keylen == keylen) | |
966 | { | |
967 | info->cipherTransform.cipherTransformId = map[i].transform; | |
968 | return TRUE; | |
969 | } | |
970 | } | |
971 | return FALSE; | |
972 | } | |
973 | ||
974 | /** | |
975 | * Get the integrity algorithm used for an AEAD transform | |
976 | */ | |
977 | static integrity_algorithm_t encr2integ(encryption_algorithm_t encr, int keylen) | |
978 | { | |
979 | struct { | |
980 | encryption_algorithm_t encr; | |
981 | int keylen; | |
982 | integrity_algorithm_t integ; | |
983 | } map[] = { | |
984 | { ENCR_NULL_AUTH_AES_GMAC, 20, AUTH_AES_128_GMAC }, | |
985 | { ENCR_NULL_AUTH_AES_GMAC, 28, AUTH_AES_192_GMAC }, | |
986 | { ENCR_NULL_AUTH_AES_GMAC, 36, AUTH_AES_256_GMAC }, | |
987 | { ENCR_AES_GCM_ICV16, 20, AUTH_AES_128_GMAC }, | |
988 | { ENCR_AES_GCM_ICV16, 28, AUTH_AES_192_GMAC }, | |
989 | { ENCR_AES_GCM_ICV16, 36, AUTH_AES_256_GMAC }, | |
990 | }; | |
991 | int i; | |
992 | ||
993 | for (i = 0; i < countof(map); i++) | |
994 | { | |
995 | if (map[i].encr == encr && map[i].keylen == keylen) | |
996 | { | |
997 | return map[i].integ; | |
998 | } | |
999 | } | |
1000 | return AUTH_UNDEFINED; | |
1001 | } | |
1002 | ||
1003 | /** | |
4a8b8568 | 1004 | * Install a single SA |
149fc48e | 1005 | */ |
f351d9ef MW |
1006 | static bool install_sa(private_kernel_wfp_ipsec_t *this, entry_t *entry, |
1007 | bool inbound, sa_entry_t *sa, FWP_IP_VERSION version) | |
149fc48e MW |
1008 | { |
1009 | IPSEC_SA_AUTH_AND_CIPHER_INFORMATION0 info = {}; | |
1010 | IPSEC_SA0 ipsec = { | |
1011 | .spi = ntohl(sa->spi), | |
1012 | }; | |
1013 | IPSEC_SA_BUNDLE0 bundle = { | |
b3f90915 MW |
1014 | .lifetime = { |
1015 | .lifetimeSeconds = inbound ? entry->isa.lifetime | |
1016 | : entry->osa.lifetime, | |
1017 | }, | |
149fc48e MW |
1018 | .saList = &ipsec, |
1019 | .numSAs = 1, | |
1020 | .ipVersion = version, | |
1021 | }; | |
1022 | struct { | |
b12c53ce | 1023 | uint16_t alg; |
149fc48e MW |
1024 | chunk_t key; |
1025 | } integ = {}, encr = {}; | |
1026 | DWORD res; | |
1027 | ||
f351d9ef | 1028 | switch (sa->protocol) |
149fc48e MW |
1029 | { |
1030 | case IPPROTO_AH: | |
1031 | ipsec.saTransformType = IPSEC_TRANSFORM_AH; | |
1032 | ipsec.ahInformation = &info.saAuthInformation; | |
1033 | integ.key = sa->integ.key; | |
1034 | integ.alg = sa->integ.alg; | |
1035 | break; | |
1036 | case IPPROTO_ESP: | |
1037 | if (sa->encr.alg == ENCR_NULL || | |
1038 | sa->encr.alg == ENCR_NULL_AUTH_AES_GMAC) | |
1039 | { | |
1040 | ipsec.saTransformType = IPSEC_TRANSFORM_ESP_AUTH; | |
1041 | ipsec.espAuthInformation = &info.saAuthInformation; | |
1042 | } | |
1043 | else | |
1044 | { | |
1045 | ipsec.saTransformType = IPSEC_TRANSFORM_ESP_AUTH_AND_CIPHER; | |
1046 | ipsec.espAuthAndCipherInformation = &info; | |
1047 | encr.key = sa->encr.key; | |
1048 | encr.alg = sa->encr.alg; | |
1049 | } | |
1050 | if (encryption_algorithm_is_aead(sa->encr.alg)) | |
1051 | { | |
1052 | integ.alg = encr2integ(sa->encr.alg, sa->encr.key.len); | |
1053 | integ.key = sa->encr.key; | |
1054 | } | |
1055 | else | |
1056 | { | |
1057 | integ.alg = sa->integ.alg; | |
1058 | integ.key = sa->integ.key; | |
1059 | } | |
1060 | break; | |
1061 | default: | |
1062 | return FALSE; | |
1063 | } | |
1064 | ||
1065 | if (integ.alg) | |
1066 | { | |
1067 | info.saAuthInformation.authKey = chunk2blob(integ.key); | |
1068 | if (!alg2auth(integ.alg, &info.saAuthInformation)) | |
1069 | { | |
1070 | DBG1(DBG_KNL, "integrity algorithm %N not supported by WFP", | |
1071 | integrity_algorithm_names, integ.alg); | |
1072 | return FALSE; | |
1073 | } | |
1074 | } | |
1075 | if (encr.alg) | |
1076 | { | |
1077 | info.saCipherInformation.cipherKey = chunk2blob(encr.key); | |
1078 | if (!alg2cipher(encr.alg, encr.key.len, &info.saCipherInformation)) | |
1079 | { | |
1080 | DBG1(DBG_KNL, "encryption algorithm %N not supported by WFP", | |
1081 | encryption_algorithm_names, encr.alg); | |
1082 | return FALSE; | |
1083 | } | |
1084 | } | |
1085 | ||
f351d9ef | 1086 | if (inbound) |
149fc48e MW |
1087 | { |
1088 | res = IPsecSaContextAddInbound0(this->handle, entry->sa_id, &bundle); | |
1089 | } | |
1090 | else | |
1091 | { | |
a4f3b363 | 1092 | bundle.flags |= IPSEC_SA_BUNDLE_FLAG_ASSUME_UDP_CONTEXT_OUTBOUND; |
149fc48e MW |
1093 | res = IPsecSaContextAddOutbound0(this->handle, entry->sa_id, &bundle); |
1094 | } | |
1095 | if (res != ERROR_SUCCESS) | |
1096 | { | |
1097 | DBG1(DBG_KNL, "adding %sbound WFP SA failed: 0x%08x", | |
f351d9ef | 1098 | inbound ? "in" : "out", res); |
149fc48e MW |
1099 | return FALSE; |
1100 | } | |
1101 | return TRUE; | |
1102 | } | |
1103 | ||
6aaa4327 MW |
1104 | /** |
1105 | * Convert an IPv6 host address to WFP representation | |
1106 | */ | |
1107 | static void host2address6(host_t *host, void *out) | |
1108 | { | |
b12c53ce | 1109 | uint32_t *src, *dst = out; |
6aaa4327 | 1110 | |
b12c53ce | 1111 | src = (uint32_t*)host->get_address(host).ptr; |
6aaa4327 MW |
1112 | |
1113 | dst[0] = untoh32(&src[3]); | |
1114 | dst[1] = untoh32(&src[2]); | |
1115 | dst[2] = untoh32(&src[1]); | |
1116 | dst[3] = untoh32(&src[0]); | |
1117 | } | |
1118 | ||
9b5c9564 MW |
1119 | /** |
1120 | * Fill in traffic structure from entry addresses | |
1121 | */ | |
1122 | static bool hosts2traffic(private_kernel_wfp_ipsec_t *this, | |
1123 | host_t *l, host_t *r, IPSEC_TRAFFIC1 *traffic) | |
1124 | { | |
1125 | if (l->get_family(l) != r->get_family(r)) | |
1126 | { | |
1127 | return FALSE; | |
1128 | } | |
1129 | switch (l->get_family(l)) | |
1130 | { | |
1131 | case AF_INET: | |
1132 | traffic->ipVersion = FWP_IP_VERSION_V4; | |
1133 | traffic->localV4Address = untoh32(l->get_address(l).ptr); | |
1134 | traffic->remoteV4Address = untoh32(r->get_address(r).ptr); | |
1135 | return TRUE; | |
1136 | case AF_INET6: | |
1137 | traffic->ipVersion = FWP_IP_VERSION_V6; | |
6aaa4327 MW |
1138 | host2address6(l, &traffic->localV6Address); |
1139 | host2address6(r, &traffic->remoteV6Address); | |
9b5c9564 MW |
1140 | return TRUE; |
1141 | default: | |
1142 | return FALSE; | |
1143 | } | |
1144 | } | |
1145 | ||
149fc48e | 1146 | /** |
4a8b8568 | 1147 | * Install SAs to the kernel |
149fc48e | 1148 | */ |
4a8b8568 MW |
1149 | static bool install_sas(private_kernel_wfp_ipsec_t *this, entry_t *entry, |
1150 | IPSEC_TRAFFIC_TYPE type) | |
149fc48e | 1151 | { |
9b5c9564 | 1152 | IPSEC_TRAFFIC1 traffic = { |
4a8b8568 | 1153 | .trafficType = type, |
149fc48e MW |
1154 | }; |
1155 | IPSEC_GETSPI1 spi = { | |
1156 | .inboundIpsecTraffic = { | |
4a8b8568 | 1157 | .trafficType = type, |
149fc48e MW |
1158 | }, |
1159 | }; | |
4b512803 MW |
1160 | enumerator_t *enumerator; |
1161 | sp_entry_t *sp; | |
149fc48e MW |
1162 | DWORD res; |
1163 | ||
4a8b8568 MW |
1164 | if (type == IPSEC_TRAFFIC_TYPE_TRANSPORT) |
1165 | { | |
4b512803 MW |
1166 | enumerator = array_create_enumerator(entry->sps); |
1167 | if (enumerator->enumerate(enumerator, &sp)) | |
1168 | { | |
1169 | traffic.ipsecFilterId = sp->policy_out; | |
1170 | spi.inboundIpsecTraffic.ipsecFilterId = sp->policy_in; | |
1171 | } | |
1172 | else | |
1173 | { | |
1174 | enumerator->destroy(enumerator); | |
1175 | return FALSE; | |
1176 | } | |
1177 | enumerator->destroy(enumerator); | |
4a8b8568 MW |
1178 | } |
1179 | else | |
1180 | { | |
1678f0a9 MW |
1181 | traffic.tunnelPolicyId = entry->provider; |
1182 | spi.inboundIpsecTraffic.tunnelPolicyId = entry->provider; | |
4a8b8568 MW |
1183 | } |
1184 | ||
9b5c9564 | 1185 | if (!hosts2traffic(this, entry->local, entry->remote, &traffic)) |
149fc48e | 1186 | { |
9b5c9564 | 1187 | return FALSE; |
149fc48e MW |
1188 | } |
1189 | ||
9b5c9564 MW |
1190 | res = IPsecSaContextCreate1(this->handle, &traffic, NULL, NULL, |
1191 | &entry->sa_id); | |
149fc48e MW |
1192 | if (res != ERROR_SUCCESS) |
1193 | { | |
1194 | DBG1(DBG_KNL, "creating WFP SA context failed: 0x%08x", res); | |
1195 | return FALSE; | |
1196 | } | |
1197 | ||
149fc48e MW |
1198 | memcpy(spi.inboundIpsecTraffic.localV6Address, traffic.localV6Address, |
1199 | sizeof(traffic.localV6Address)); | |
1200 | memcpy(spi.inboundIpsecTraffic.remoteV6Address, traffic.remoteV6Address, | |
1201 | sizeof(traffic.remoteV6Address)); | |
1202 | spi.ipVersion = traffic.ipVersion; | |
1203 | ||
f351d9ef MW |
1204 | res = IPsecSaContextSetSpi0(this->handle, entry->sa_id, &spi, |
1205 | ntohl(entry->isa.spi)); | |
149fc48e MW |
1206 | if (res != ERROR_SUCCESS) |
1207 | { | |
1208 | DBG1(DBG_KNL, "setting WFP SA SPI failed: 0x%08x", res); | |
1209 | IPsecSaContextDeleteById0(this->handle, entry->sa_id); | |
1210 | entry->sa_id = 0; | |
1211 | return FALSE; | |
1212 | } | |
1213 | ||
f351d9ef MW |
1214 | if (!install_sa(this, entry, TRUE, &entry->isa, spi.ipVersion) || |
1215 | !install_sa(this, entry, FALSE, &entry->osa, spi.ipVersion)) | |
149fc48e | 1216 | { |
f351d9ef MW |
1217 | IPsecSaContextDeleteById0(this->handle, entry->sa_id); |
1218 | entry->sa_id = 0; | |
1219 | return FALSE; | |
149fc48e | 1220 | } |
149fc48e | 1221 | |
1987b709 MW |
1222 | if (entry->encap) |
1223 | { | |
1224 | IPSEC_V4_UDP_ENCAPSULATION0 encap = { | |
1225 | .localUdpEncapPort = entry->local->get_port(entry->local), | |
1226 | .remoteUdpEncapPort = entry->remote->get_port(entry->remote), | |
1227 | }; | |
1228 | IPSEC_SA_CONTEXT1 *ctx; | |
1229 | ||
1230 | res = IPsecSaContextGetById1(this->handle, entry->sa_id, &ctx); | |
1231 | if (res != ERROR_SUCCESS) | |
1232 | { | |
1233 | DBG1(DBG_KNL, "getting WFP SA for UDP encap failed: 0x%08x", res); | |
1234 | IPsecSaContextDeleteById0(this->handle, entry->sa_id); | |
1235 | entry->sa_id = 0; | |
1236 | return FALSE; | |
1237 | } | |
1238 | ctx->inboundSa->udpEncapsulation = &encap; | |
1239 | ctx->outboundSa->udpEncapsulation = &encap; | |
1240 | ||
1241 | res = IPsecSaContextUpdate0(this->handle, | |
1242 | IPSEC_SA_DETAILS_UPDATE_UDP_ENCAPSULATION, ctx); | |
1243 | FwpmFreeMemory0((void**)&ctx); | |
1244 | if (res != ERROR_SUCCESS) | |
1245 | { | |
1246 | DBG1(DBG_KNL, "enable WFP UDP encap failed: 0x%08x", res); | |
1247 | IPsecSaContextDeleteById0(this->handle, entry->sa_id); | |
1248 | entry->sa_id = 0; | |
1249 | return FALSE; | |
1250 | } | |
1251 | } | |
1252 | ||
149fc48e MW |
1253 | return TRUE; |
1254 | } | |
1255 | ||
1256 | /** | |
1257 | * Install a transport mode SA/SP set to the kernel | |
1258 | */ | |
1259 | static bool install_transport(private_kernel_wfp_ipsec_t *this, entry_t *entry) | |
1260 | { | |
6de78870 | 1261 | if (install_sps(this, entry, NULL) && |
4a8b8568 | 1262 | install_sas(this, entry, IPSEC_TRAFFIC_TYPE_TRANSPORT)) |
149fc48e MW |
1263 | { |
1264 | return TRUE; | |
1265 | } | |
4a8b8568 MW |
1266 | cleanup_policies(this, entry); |
1267 | return FALSE; | |
1268 | } | |
1269 | ||
1270 | /** | |
1271 | * Generate a new GUID, random | |
1272 | */ | |
1273 | static bool generate_guid(private_kernel_wfp_ipsec_t *this, GUID *guid) | |
1274 | { | |
1275 | bool ok; | |
1276 | rng_t *rng; | |
1277 | ||
1278 | rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK); | |
1279 | if (!rng) | |
149fc48e | 1280 | { |
4a8b8568 | 1281 | return FALSE; |
149fc48e | 1282 | } |
b12c53ce | 1283 | ok = rng->get_bytes(rng, sizeof(GUID), (uint8_t*)guid); |
4a8b8568 MW |
1284 | rng->destroy(rng); |
1285 | return ok; | |
1286 | } | |
1287 | ||
1288 | /** | |
6de78870 | 1289 | * Register a dummy tunnel provider to associate tunnel filters to |
4a8b8568 | 1290 | */ |
6de78870 MW |
1291 | static bool add_tunnel_provider(private_kernel_wfp_ipsec_t *this, |
1292 | entry_t *entry, GUID *guid, UINT64 *luid) | |
4a8b8568 | 1293 | { |
4a8b8568 MW |
1294 | DWORD res; |
1295 | ||
1296 | IPSEC_AUTH_TRANSFORM0 transform = { | |
1297 | /* Create any valid proposal. This is actually not used, as we | |
1298 | * don't create an SA from this information. */ | |
1299 | .authTransformId = IPSEC_AUTH_TRANSFORM_ID_HMAC_SHA_1_96, | |
1300 | }; | |
1301 | IPSEC_SA_TRANSFORM0 transforms = { | |
1302 | .ipsecTransformType = IPSEC_TRANSFORM_ESP_AUTH, | |
1303 | .espAuthTransform = &transform, | |
1304 | }; | |
1305 | IPSEC_PROPOSAL0 proposal = { | |
1306 | .lifetime = { | |
1307 | /* We need a valid lifetime, even if we don't create any SA | |
1308 | * from these values. Pick some values accepted. */ | |
1309 | .lifetimeSeconds = 0xFFFF, | |
1310 | .lifetimeKilobytes = 0xFFFFFFFF, | |
1311 | .lifetimePackets = 0xFFFFFFFF, | |
1312 | }, | |
1313 | .numSaTransforms = 1, | |
1314 | .saTransforms = &transforms, | |
1315 | }; | |
1316 | IPSEC_TUNNEL_POLICY0 policy = { | |
1317 | .numIpsecProposals = 1, | |
1318 | .ipsecProposals = &proposal, | |
1319 | .saIdleTimeout = { | |
1320 | /* not used, set to lifetime for maximum */ | |
1321 | .idleTimeoutSeconds = proposal.lifetime.lifetimeSeconds, | |
1322 | .idleTimeoutSecondsFailOver = proposal.lifetime.lifetimeSeconds, | |
1323 | }, | |
1324 | }; | |
1678f0a9 | 1325 | FWPM_PROVIDER_CONTEXT0 qm = { |
4a8b8568 | 1326 | .displayData = { |
6de78870 | 1327 | .name = L"charon tunnel provider", |
4a8b8568 MW |
1328 | }, |
1329 | .providerKey = (GUID*)&this->provider.providerKey, | |
1330 | .type = FWPM_IPSEC_IKE_QM_TUNNEL_CONTEXT, | |
1331 | .ikeQmTunnelPolicy = &policy, | |
1332 | }; | |
1333 | ||
1334 | switch (entry->local->get_family(entry->local)) | |
149fc48e | 1335 | { |
4a8b8568 MW |
1336 | case AF_INET: |
1337 | policy.tunnelEndpoints.ipVersion = FWP_IP_VERSION_V4; | |
1338 | policy.tunnelEndpoints.localV4Address = | |
1339 | untoh32(entry->local->get_address(entry->local).ptr); | |
1340 | policy.tunnelEndpoints.remoteV4Address = | |
1341 | untoh32(entry->remote->get_address(entry->remote).ptr); | |
1342 | break; | |
1343 | case AF_INET6: | |
1344 | policy.tunnelEndpoints.ipVersion = FWP_IP_VERSION_V6; | |
6de78870 MW |
1345 | host2address6(entry->local, &policy.tunnelEndpoints.localV6Address); |
1346 | host2address6(entry->remote, &policy.tunnelEndpoints.remoteV6Address); | |
4a8b8568 MW |
1347 | break; |
1348 | default: | |
1349 | return FALSE; | |
1350 | } | |
1351 | ||
1352 | if (!generate_guid(this, &qm.providerContextKey)) | |
1353 | { | |
1354 | return FALSE; | |
1355 | } | |
1356 | ||
6de78870 | 1357 | res = FwpmProviderContextAdd0(this->handle, &qm, NULL, luid); |
4a8b8568 MW |
1358 | if (res != ERROR_SUCCESS) |
1359 | { | |
1678f0a9 | 1360 | DBG1(DBG_KNL, "adding provider context failed: 0x%08x", res); |
4a8b8568 MW |
1361 | return FALSE; |
1362 | } | |
6de78870 MW |
1363 | *guid = qm.providerContextKey; |
1364 | return TRUE; | |
1365 | } | |
4a8b8568 | 1366 | |
6de78870 MW |
1367 | /** |
1368 | * Install tunnel mode SPs to the kernel | |
1369 | */ | |
1370 | static bool install_tunnel_sps(private_kernel_wfp_ipsec_t *this, entry_t *entry) | |
1371 | { | |
1372 | GUID guid; | |
1373 | ||
1374 | if (!add_tunnel_provider(this, entry, &guid, &entry->provider)) | |
1375 | { | |
1376 | return FALSE; | |
1377 | } | |
1378 | if (!install_sps(this, entry, &guid)) | |
4a8b8568 | 1379 | { |
4a8b8568 MW |
1380 | return FALSE; |
1381 | } | |
4a8b8568 MW |
1382 | return TRUE; |
1383 | } | |
1384 | ||
b714746e MW |
1385 | /** |
1386 | * Reduce refcount, or uninstall a route if all refs gone | |
1387 | */ | |
1388 | static bool uninstall_route(private_kernel_wfp_ipsec_t *this, | |
b12c53ce | 1389 | host_t *dst, uint8_t mask, host_t *src, host_t *gtw) |
b714746e MW |
1390 | { |
1391 | route_t *route, key = { | |
1392 | .dst = dst, | |
1393 | .mask = mask, | |
1394 | .src = src, | |
1395 | }; | |
1396 | char *name; | |
1397 | bool res = FALSE; | |
1398 | ||
1399 | this->mutex->lock(this->mutex); | |
1400 | route = this->routes->get(this->routes, &key); | |
1401 | if (route) | |
1402 | { | |
1403 | if (--route->refs == 0) | |
1404 | { | |
8394ea2a | 1405 | if (charon->kernel->get_interface(charon->kernel, src, &name)) |
b714746e | 1406 | { |
8394ea2a | 1407 | res = charon->kernel->del_route(charon->kernel, |
09f4bccf NK |
1408 | dst->get_address(dst), mask, gtw, src, |
1409 | name, FALSE) == SUCCESS; | |
b714746e MW |
1410 | free(name); |
1411 | } | |
1412 | route = this->routes->remove(this->routes, route); | |
1413 | if (route) | |
1414 | { | |
1415 | destroy_route(route); | |
1416 | } | |
1417 | } | |
1418 | else | |
1419 | { | |
1420 | res = TRUE; | |
1421 | } | |
1422 | } | |
1423 | this->mutex->unlock(this->mutex); | |
1424 | ||
1425 | return res; | |
1426 | } | |
1427 | ||
1428 | /** | |
1429 | * Install a single route, or refcount if exists | |
1430 | */ | |
1431 | static bool install_route(private_kernel_wfp_ipsec_t *this, | |
b12c53ce | 1432 | host_t *dst, uint8_t mask, host_t *src, host_t *gtw) |
b714746e MW |
1433 | { |
1434 | route_t *route, key = { | |
1435 | .dst = dst, | |
1436 | .mask = mask, | |
1437 | .src = src, | |
1438 | }; | |
1439 | char *name; | |
1440 | bool res = FALSE; | |
1441 | ||
1442 | this->mutex->lock(this->mutex); | |
1443 | route = this->routes->get(this->routes, &key); | |
1444 | if (route) | |
1445 | { | |
1446 | route->refs++; | |
1447 | res = TRUE; | |
1448 | } | |
1449 | else | |
1450 | { | |
8394ea2a | 1451 | if (charon->kernel->get_interface(charon->kernel, src, &name)) |
b714746e | 1452 | { |
09f4bccf NK |
1453 | if (charon->kernel->add_route(charon->kernel, dst->get_address(dst), |
1454 | mask, gtw, src, name, FALSE) == SUCCESS) | |
b714746e MW |
1455 | { |
1456 | INIT(route, | |
1457 | .dst = dst->clone(dst), | |
1458 | .mask = mask, | |
1459 | .src = src->clone(src), | |
1460 | .gtw = gtw ? gtw->clone(gtw) : NULL, | |
1461 | .refs = 1, | |
1462 | ); | |
1463 | route = this->routes->put(this->routes, route, route); | |
1464 | if (route) | |
1465 | { | |
1466 | destroy_route(route); | |
1467 | } | |
1468 | res = TRUE; | |
1469 | } | |
1470 | free(name); | |
1471 | } | |
1472 | } | |
1473 | this->mutex->unlock(this->mutex); | |
1474 | ||
1475 | return res; | |
1476 | } | |
1477 | ||
e36d1d41 MW |
1478 | /** |
1479 | * (Un)-install a single route | |
1480 | */ | |
1481 | static bool manage_route(private_kernel_wfp_ipsec_t *this, | |
1482 | host_t *local, host_t *remote, | |
1483 | traffic_selector_t *src_ts, traffic_selector_t *dst_ts, | |
1484 | bool add) | |
1485 | { | |
1486 | host_t *src, *dst, *gtw; | |
b12c53ce | 1487 | uint8_t mask; |
e36d1d41 MW |
1488 | bool done; |
1489 | ||
1490 | if (!dst_ts->to_subnet(dst_ts, &dst, &mask)) | |
1491 | { | |
1492 | return FALSE; | |
1493 | } | |
8394ea2a TB |
1494 | if (charon->kernel->get_address_by_ts(charon->kernel, src_ts, &src, |
1495 | NULL) != SUCCESS) | |
e36d1d41 MW |
1496 | { |
1497 | dst->destroy(dst); | |
1498 | return FALSE; | |
1499 | } | |
99a57aa5 | 1500 | gtw = charon->kernel->get_nexthop(charon->kernel, remote, -1, local, NULL); |
e36d1d41 MW |
1501 | if (add) |
1502 | { | |
1503 | done = install_route(this, dst, mask, src, gtw); | |
1504 | } | |
1505 | else | |
1506 | { | |
1507 | done = uninstall_route(this, dst, mask, src, gtw); | |
1508 | } | |
1509 | dst->destroy(dst); | |
1510 | src->destroy(src); | |
1511 | DESTROY_IF(gtw); | |
1512 | ||
1513 | if (!done) | |
1514 | { | |
1515 | DBG1(DBG_KNL, "%sinstalling route for policy %R === %R failed", | |
1516 | add ? "" : "un", src_ts, dst_ts); | |
1517 | } | |
1518 | return done; | |
1519 | } | |
1520 | ||
b714746e MW |
1521 | /** |
1522 | * (Un)-install routes for IPsec policies | |
1523 | */ | |
1524 | static bool manage_routes(private_kernel_wfp_ipsec_t *this, entry_t *entry, | |
1525 | bool add) | |
1526 | { | |
1527 | enumerator_t *enumerator; | |
b714746e | 1528 | sp_entry_t *sp; |
b714746e MW |
1529 | |
1530 | enumerator = array_create_enumerator(entry->sps); | |
1531 | while (enumerator->enumerate(enumerator, &sp)) | |
1532 | { | |
4b512803 MW |
1533 | if (add && sp->route) |
1534 | { | |
1535 | continue; | |
1536 | } | |
1537 | if (!add && !sp->route) | |
1538 | { | |
1539 | continue; | |
1540 | } | |
e36d1d41 MW |
1541 | if (manage_route(this, entry->local, entry->remote, |
1542 | sp->src, sp->dst, add)) | |
b714746e | 1543 | { |
e36d1d41 | 1544 | sp->route = add; |
b714746e | 1545 | } |
b714746e MW |
1546 | } |
1547 | enumerator->destroy(enumerator); | |
1548 | ||
1549 | return TRUE; | |
1550 | } | |
1551 | ||
4a8b8568 MW |
1552 | /** |
1553 | * Install a tunnel mode SA/SP set to the kernel | |
1554 | */ | |
1555 | static bool install_tunnel(private_kernel_wfp_ipsec_t *this, entry_t *entry) | |
1556 | { | |
1557 | if (install_tunnel_sps(this, entry) && | |
b714746e | 1558 | manage_routes(this, entry, TRUE) && |
4a8b8568 MW |
1559 | install_sas(this, entry, IPSEC_TRAFFIC_TYPE_TUNNEL)) |
1560 | { | |
1561 | return TRUE; | |
149fc48e | 1562 | } |
4a8b8568 | 1563 | cleanup_policies(this, entry); |
149fc48e MW |
1564 | return FALSE; |
1565 | } | |
1566 | ||
1567 | /** | |
1568 | * Install a SA/SP set to the kernel | |
1569 | */ | |
1570 | static bool install(private_kernel_wfp_ipsec_t *this, entry_t *entry) | |
1571 | { | |
1572 | switch (entry->mode) | |
1573 | { | |
1574 | case MODE_TRANSPORT: | |
1575 | return install_transport(this, entry); | |
1576 | case MODE_TUNNEL: | |
4a8b8568 | 1577 | return install_tunnel(this, entry); |
149fc48e MW |
1578 | case MODE_BEET: |
1579 | default: | |
1580 | return FALSE; | |
1581 | } | |
1582 | } | |
1583 | ||
c6f189e4 MW |
1584 | /** |
1585 | * Installed trap entry | |
1586 | */ | |
1587 | typedef struct { | |
1588 | /** reqid this trap is installed for */ | |
b12c53ce | 1589 | uint32_t reqid; |
6de78870 MW |
1590 | /** is this a forward policy trap for tunnel mode? */ |
1591 | bool fwd; | |
78bde29a MW |
1592 | /** do we have installed a route for this trap policy? */ |
1593 | bool route; | |
1594 | /** local address of associated route */ | |
1595 | host_t *local; | |
1596 | /** remote address of associated route */ | |
1597 | host_t *remote; | |
6de78870 MW |
1598 | /** src traffic selector */ |
1599 | traffic_selector_t *src; | |
1600 | /** dst traffic selector */ | |
1601 | traffic_selector_t *dst; | |
c6f189e4 MW |
1602 | /** LUID of installed tunnel policy filter */ |
1603 | UINT64 filter_id; | |
1604 | } trap_t; | |
1605 | ||
1606 | /** | |
1607 | * Destroy a trap entry | |
1608 | */ | |
1609 | static void destroy_trap(trap_t *this) | |
1610 | { | |
78bde29a MW |
1611 | this->local->destroy(this->local); |
1612 | this->remote->destroy(this->remote); | |
6de78870 MW |
1613 | this->src->destroy(this->src); |
1614 | this->dst->destroy(this->dst); | |
c6f189e4 MW |
1615 | free(this); |
1616 | } | |
1617 | ||
1618 | /** | |
1619 | * Hashtable equals function for traps | |
1620 | */ | |
1621 | static bool equals_trap(trap_t *a, trap_t *b) | |
1622 | { | |
1623 | return a->filter_id == b->filter_id; | |
1624 | } | |
1625 | ||
1626 | /** | |
1627 | * Hashtable hash function for traps | |
1628 | */ | |
1629 | static u_int hash_trap(trap_t *trap) | |
1630 | { | |
1631 | return chunk_hash(chunk_from_thing(trap->filter_id)); | |
1632 | } | |
1633 | ||
1634 | /** | |
1635 | * Send an acquire for an installed trap filter | |
1636 | */ | |
1637 | static void acquire(private_kernel_wfp_ipsec_t *this, UINT64 filter_id, | |
1638 | traffic_selector_t *src, traffic_selector_t *dst) | |
1639 | { | |
3b699c72 | 1640 | kernel_acquire_data_t data = {}; |
b12c53ce | 1641 | uint32_t reqid = 0; |
c6f189e4 MW |
1642 | trap_t *trap, key = { |
1643 | .filter_id = filter_id, | |
1644 | }; | |
1645 | ||
1646 | this->mutex->lock(this->mutex); | |
1647 | trap = this->traps->get(this->traps, &key); | |
1648 | if (trap) | |
1649 | { | |
1650 | reqid = trap->reqid; | |
1651 | } | |
1652 | this->mutex->unlock(this->mutex); | |
1653 | ||
1654 | if (reqid) | |
1655 | { | |
3b699c72 TB |
1656 | data.src = src ? src->clone(src) : NULL; |
1657 | data.dst = dst ? dst->clone(dst) : NULL; | |
1658 | ||
1659 | charon->kernel->acquire(charon->kernel, reqid, &data); | |
1660 | ||
1661 | DESTROY_IF(data.src); | |
1662 | DESTROY_IF(data.dst); | |
c6f189e4 MW |
1663 | } |
1664 | } | |
1665 | ||
1666 | /** | |
1667 | * Create a single host traffic selector from an FWP address definition | |
1668 | */ | |
1669 | static traffic_selector_t *addr2ts(FWP_IP_VERSION version, void *data, | |
b12c53ce | 1670 | uint8_t protocol, uint16_t from_port, uint16_t to_port) |
c6f189e4 MW |
1671 | { |
1672 | ts_type_t type; | |
1673 | UINT32 ints[4]; | |
1674 | chunk_t addr; | |
1675 | ||
1676 | switch (version) | |
1677 | { | |
1678 | case FWP_IP_VERSION_V4: | |
1679 | ints[0] = untoh32(data); | |
1680 | addr = chunk_from_thing(ints[0]); | |
1681 | type = TS_IPV4_ADDR_RANGE; | |
1682 | break; | |
1683 | case FWP_IP_VERSION_V6: | |
1684 | ints[3] = untoh32(data); | |
1685 | ints[2] = untoh32(data + 4); | |
1686 | ints[1] = untoh32(data + 8); | |
1687 | ints[0] = untoh32(data + 12); | |
1688 | addr = chunk_from_thing(ints); | |
1689 | type = TS_IPV6_ADDR_RANGE; | |
1690 | break; | |
1691 | default: | |
1692 | return NULL; | |
1693 | } | |
1694 | return traffic_selector_create_from_bytes(protocol, type, addr, from_port, | |
1695 | addr, to_port); | |
1696 | } | |
1697 | ||
28683140 MW |
1698 | /** |
1699 | * FwpmNetEventSubscribe0() callback | |
1700 | */ | |
cab59c73 | 1701 | static void WINAPI event_callback(void *user, const FWPM_NET_EVENT1 *event) |
28683140 | 1702 | { |
cab59c73 | 1703 | private_kernel_wfp_ipsec_t *this = user; |
c6f189e4 | 1704 | traffic_selector_t *local = NULL, *remote = NULL; |
b12c53ce AS |
1705 | uint8_t protocol = 0; |
1706 | uint16_t from_local = 0, to_local = 65535; | |
1707 | uint16_t from_remote = 0, to_remote = 65535; | |
c6f189e4 MW |
1708 | |
1709 | if ((event->header.flags & FWPM_NET_EVENT_FLAG_LOCAL_ADDR_SET) && | |
1710 | (event->header.flags & FWPM_NET_EVENT_FLAG_REMOTE_ADDR_SET)) | |
1711 | { | |
1712 | if (event->header.flags & FWPM_NET_EVENT_FLAG_LOCAL_PORT_SET) | |
1713 | { | |
1714 | from_local = to_local = event->header.localPort; | |
1715 | } | |
1716 | if (event->header.flags & FWPM_NET_EVENT_FLAG_LOCAL_PORT_SET) | |
1717 | { | |
1718 | from_remote = to_remote = event->header.remotePort; | |
1719 | } | |
1720 | if (event->header.flags & FWPM_NET_EVENT_FLAG_IP_PROTOCOL_SET) | |
1721 | { | |
1722 | protocol = event->header.ipProtocol; | |
1723 | } | |
1724 | ||
1725 | local = addr2ts(event->header.ipVersion, | |
1726 | (void*)&event->header.localAddrV6, | |
1727 | protocol, from_local, to_local); | |
1728 | remote = addr2ts(event->header.ipVersion, | |
1729 | (void*)&event->header.remoteAddrV6, | |
1730 | protocol, from_remote, to_remote); | |
1731 | } | |
1732 | ||
1733 | switch (event->type) | |
1734 | { | |
1735 | case FWPM_NET_EVENT_TYPE_CLASSIFY_DROP: | |
1736 | acquire(this, event->classifyDrop->filterId, local, remote); | |
1737 | break; | |
1738 | case FWPM_NET_EVENT_TYPE_IKEEXT_MM_FAILURE: | |
4d48dfd6 MW |
1739 | DBG1(DBG_KNL, "WFP MM failure: %R === %R, 0x%08x, filterId %llu", |
1740 | local, remote, event->ikeMmFailure->failureErrorCode, | |
1741 | event->ikeMmFailure->mmFilterId); | |
1742 | break; | |
c6f189e4 | 1743 | case FWPM_NET_EVENT_TYPE_IKEEXT_QM_FAILURE: |
4d48dfd6 MW |
1744 | DBG1(DBG_KNL, "WFP QM failure: %R === %R, 0x%08x, filterId %llu", |
1745 | local, remote, event->ikeQmFailure->failureErrorCode, | |
1746 | event->ikeQmFailure->qmFilterId); | |
1747 | break; | |
c6f189e4 | 1748 | case FWPM_NET_EVENT_TYPE_IKEEXT_EM_FAILURE: |
4d48dfd6 MW |
1749 | DBG1(DBG_KNL, "WFP EM failure: %R === %R, 0x%08x, filterId %llu", |
1750 | local, remote, event->ikeEmFailure->failureErrorCode, | |
1751 | event->ikeEmFailure->qmFilterId); | |
1752 | break; | |
c6f189e4 | 1753 | case FWPM_NET_EVENT_TYPE_IPSEC_KERNEL_DROP: |
c7d30c2a MW |
1754 | DBG1(DBG_KNL, "IPsec kernel drop: %R === %R, error 0x%08x, " |
1755 | "SPI 0x%08x, %s filterId %llu", local, remote, | |
1756 | event->ipsecDrop->failureStatus, event->ipsecDrop->spi, | |
1757 | event->ipsecDrop->direction ? "in" : "out", | |
1758 | event->ipsecDrop->filterId); | |
1759 | break; | |
c6f189e4 MW |
1760 | case FWPM_NET_EVENT_TYPE_IPSEC_DOSP_DROP: |
1761 | default: | |
1762 | break; | |
1763 | } | |
1764 | ||
1765 | DESTROY_IF(local); | |
1766 | DESTROY_IF(remote); | |
28683140 MW |
1767 | } |
1768 | ||
1769 | /** | |
1770 | * Register for net events | |
1771 | */ | |
1772 | static bool register_events(private_kernel_wfp_ipsec_t *this) | |
1773 | { | |
1774 | FWPM_NET_EVENT_SUBSCRIPTION0 subscription = {}; | |
1775 | DWORD res; | |
1776 | ||
1777 | res = FwpmNetEventSubscribe0(this->handle, &subscription, | |
cab59c73 | 1778 | event_callback, this, &this->event); |
28683140 MW |
1779 | if (res != ERROR_SUCCESS) |
1780 | { | |
1781 | DBG1(DBG_KNL, "registering for WFP events failed: 0x%08x", res); | |
1782 | return FALSE; | |
1783 | } | |
1784 | return TRUE; | |
1785 | } | |
1786 | ||
c6f189e4 MW |
1787 | /** |
1788 | * Install a trap policy to kernel | |
1789 | */ | |
1790 | static bool install_trap(private_kernel_wfp_ipsec_t *this, trap_t *trap) | |
1791 | { | |
1792 | FWPM_FILTER_CONDITION0 *conds = NULL; | |
1793 | int count = 0; | |
1794 | DWORD res; | |
6de78870 | 1795 | const GUID *starget, *dtarget; |
c6f189e4 MW |
1796 | UINT64 weight = 0x000000000000ff00; |
1797 | FWPM_FILTER0 filter = { | |
1798 | .displayData = { | |
1799 | .name = L"charon IPsec trap", | |
1800 | }, | |
1801 | .action = { | |
1802 | .type = FWP_ACTION_BLOCK, | |
1803 | }, | |
1804 | .weight = { | |
1805 | .type = FWP_UINT64, | |
1806 | .uint64 = &weight, | |
1807 | }, | |
1808 | }; | |
1809 | ||
6de78870 | 1810 | if (trap->fwd) |
c6f189e4 | 1811 | { |
6de78870 MW |
1812 | if (trap->src->get_type(trap->src) == TS_IPV4_ADDR_RANGE) |
1813 | { | |
1814 | filter.layerKey = FWPM_LAYER_IPFORWARD_V4; | |
1815 | } | |
1816 | else | |
1817 | { | |
1818 | filter.layerKey = FWPM_LAYER_IPFORWARD_V6; | |
1819 | } | |
1820 | starget = &FWPM_CONDITION_IP_SOURCE_ADDRESS; | |
1821 | dtarget = &FWPM_CONDITION_IP_DESTINATION_ADDRESS; | |
1822 | } | |
1823 | else | |
1824 | { | |
1825 | if (trap->src->get_type(trap->src) == TS_IPV4_ADDR_RANGE) | |
1826 | { | |
c6f189e4 | 1827 | filter.layerKey = FWPM_LAYER_OUTBOUND_TRANSPORT_V4; |
6de78870 MW |
1828 | } |
1829 | else | |
1830 | { | |
c6f189e4 | 1831 | filter.layerKey = FWPM_LAYER_OUTBOUND_TRANSPORT_V6; |
6de78870 MW |
1832 | } |
1833 | starget = &FWPM_CONDITION_IP_LOCAL_ADDRESS; | |
1834 | dtarget = &FWPM_CONDITION_IP_REMOTE_ADDRESS; | |
c6f189e4 MW |
1835 | } |
1836 | ||
6de78870 MW |
1837 | if (!ts2condition(trap->src, starget, &conds, &count) || |
1838 | !ts2condition(trap->dst, dtarget, &conds, &count)) | |
c6f189e4 MW |
1839 | { |
1840 | free_conditions(conds, count); | |
1841 | return FALSE; | |
1842 | } | |
1843 | ||
1844 | filter.numFilterConditions = count; | |
1845 | filter.filterCondition = conds; | |
1846 | ||
1847 | res = FwpmFilterAdd0(this->handle, &filter, NULL, &trap->filter_id); | |
1848 | free_conditions(conds, count); | |
1849 | if (res != ERROR_SUCCESS) | |
1850 | { | |
6de78870 | 1851 | DBG1(DBG_KNL, "installing WFP trap filter failed: 0x%08x", res); |
c6f189e4 MW |
1852 | return FALSE; |
1853 | } | |
1854 | return TRUE; | |
1855 | } | |
1856 | ||
1857 | /** | |
1858 | * Uninstall a trap policy from kernel | |
1859 | */ | |
1860 | static bool uninstall_trap(private_kernel_wfp_ipsec_t *this, trap_t *trap) | |
1861 | { | |
1862 | DWORD res; | |
1863 | ||
1864 | res = FwpmFilterDeleteById0(this->handle, trap->filter_id); | |
1865 | if (res != ERROR_SUCCESS) | |
1866 | { | |
6de78870 | 1867 | DBG1(DBG_KNL, "uninstalling WFP trap filter failed: 0x%08x", res); |
c6f189e4 MW |
1868 | return FALSE; |
1869 | } | |
1870 | return TRUE; | |
1871 | } | |
1872 | ||
1873 | /** | |
1874 | * Create and install a new trap entry | |
1875 | */ | |
6de78870 | 1876 | static bool add_trap(private_kernel_wfp_ipsec_t *this, |
b12c53ce | 1877 | uint32_t reqid, bool fwd, host_t *local, host_t *remote, |
6de78870 | 1878 | traffic_selector_t *src, traffic_selector_t *dst) |
c6f189e4 MW |
1879 | { |
1880 | trap_t *trap; | |
1881 | ||
1882 | INIT(trap, | |
1883 | .reqid = reqid, | |
6de78870 MW |
1884 | .fwd = fwd, |
1885 | .src = src->clone(src), | |
1886 | .dst = dst->clone(dst), | |
78bde29a MW |
1887 | .local = local->clone(local), |
1888 | .remote = remote->clone(remote), | |
c6f189e4 MW |
1889 | ); |
1890 | ||
1891 | if (!install_trap(this, trap)) | |
1892 | { | |
1893 | destroy_trap(trap); | |
1894 | return FALSE; | |
1895 | } | |
78bde29a MW |
1896 | |
1897 | trap->route = manage_route(this, local, remote, src, dst, TRUE); | |
1898 | ||
c6f189e4 MW |
1899 | this->mutex->lock(this->mutex); |
1900 | this->traps->put(this->traps, trap, trap); | |
1901 | this->mutex->unlock(this->mutex); | |
1902 | return TRUE; | |
1903 | } | |
1904 | ||
1905 | /** | |
1906 | * Uninstall and remove a new trap entry | |
1907 | */ | |
6de78870 | 1908 | static bool remove_trap(private_kernel_wfp_ipsec_t *this, |
b12c53ce | 1909 | uint32_t reqid, bool fwd, |
6de78870 | 1910 | traffic_selector_t *src, traffic_selector_t *dst) |
c6f189e4 MW |
1911 | { |
1912 | enumerator_t *enumerator; | |
1913 | trap_t *trap, *found = NULL; | |
1914 | ||
1915 | this->mutex->lock(this->mutex); | |
1916 | enumerator = this->traps->create_enumerator(this->traps); | |
1917 | while (enumerator->enumerate(enumerator, NULL, &trap)) | |
1918 | { | |
1919 | if (reqid == trap->reqid && | |
6de78870 MW |
1920 | fwd == trap->fwd && |
1921 | src->equals(src, trap->src) && | |
1922 | dst->equals(dst, trap->dst)) | |
c6f189e4 MW |
1923 | { |
1924 | this->traps->remove_at(this->traps, enumerator); | |
1925 | found = trap; | |
1926 | break; | |
1927 | } | |
1928 | } | |
1929 | enumerator->destroy(enumerator); | |
1930 | this->mutex->unlock(this->mutex); | |
1931 | ||
1932 | if (found) | |
1933 | { | |
78bde29a MW |
1934 | if (trap->route) |
1935 | { | |
1936 | trap->route = !manage_route(this, trap->local, trap->remote, | |
1937 | src, dst, FALSE); | |
1938 | } | |
c6f189e4 MW |
1939 | uninstall_trap(this, found); |
1940 | destroy_trap(found); | |
1941 | return TRUE; | |
1942 | } | |
1943 | return FALSE; | |
1944 | } | |
1945 | ||
8d91eee3 MW |
1946 | METHOD(kernel_ipsec_t, get_features, kernel_feature_t, |
1947 | private_kernel_wfp_ipsec_t *this) | |
1948 | { | |
b9349298 | 1949 | return KERNEL_ESP_V3_TFC | KERNEL_NO_POLICY_UPDATES; |
8d91eee3 MW |
1950 | } |
1951 | ||
bbe42a1f MW |
1952 | /** |
1953 | * Initialize seeds for SPI generation | |
1954 | */ | |
1955 | static bool init_spi(private_kernel_wfp_ipsec_t *this) | |
1956 | { | |
1957 | bool ok = TRUE; | |
1958 | rng_t *rng; | |
1959 | ||
1960 | rng = lib->crypto->create_rng(lib->crypto, RNG_STRONG); | |
1961 | if (!rng) | |
1962 | { | |
1963 | return FALSE; | |
1964 | } | |
b12c53ce | 1965 | ok = rng->get_bytes(rng, sizeof(this->nextspi), (uint8_t*)&this->nextspi); |
bbe42a1f MW |
1966 | if (ok) |
1967 | { | |
b12c53ce | 1968 | ok = rng->get_bytes(rng, sizeof(this->mixspi), (uint8_t*)&this->mixspi); |
bbe42a1f MW |
1969 | } |
1970 | rng->destroy(rng); | |
1971 | return ok; | |
1972 | } | |
1973 | ||
1974 | /** | |
1975 | * Map an integer x with a one-to-one function using quadratic residues. | |
1976 | */ | |
1977 | static u_int permute(u_int x, u_int p) | |
1978 | { | |
1979 | u_int qr; | |
1980 | ||
1981 | x = x % p; | |
b12c53ce | 1982 | qr = ((uint64_t)x * x) % p; |
bbe42a1f MW |
1983 | if (x <= p / 2) |
1984 | { | |
1985 | return qr; | |
1986 | } | |
1987 | return p - qr; | |
1988 | } | |
1989 | ||
8d91eee3 MW |
1990 | METHOD(kernel_ipsec_t, get_spi, status_t, |
1991 | private_kernel_wfp_ipsec_t *this, host_t *src, host_t *dst, | |
b12c53ce | 1992 | uint8_t protocol, uint32_t *spi) |
8d91eee3 | 1993 | { |
2db6d5b8 | 1994 | /* To avoid sequential SPIs, we use a one-to-one permutation function on |
bbe42a1f MW |
1995 | * an incrementing counter, that is a full period PRNG for the range we |
1996 | * allocate SPIs in. We add some randomness using a fixed XOR and start | |
1997 | * the counter at random position. This is not cryptographically safe, | |
1998 | * but that is actually not required. | |
1999 | * The selected prime should be smaller than the range we allocate SPIs | |
2000 | * in, and it must satisfy p % 4 == 3 to map x > p/2 using p - qr. */ | |
2001 | static const u_int p = 268435399, offset = 0xc0000000; | |
2002 | ||
2003 | *spi = htonl(offset + permute(ref_get(&this->nextspi) ^ this->mixspi, p)); | |
96ab7a80 | 2004 | return SUCCESS; |
8d91eee3 MW |
2005 | } |
2006 | ||
2007 | METHOD(kernel_ipsec_t, get_cpi, status_t, | |
2008 | private_kernel_wfp_ipsec_t *this, host_t *src, host_t *dst, | |
b12c53ce | 2009 | uint16_t *cpi) |
8d91eee3 MW |
2010 | { |
2011 | return NOT_SUPPORTED; | |
2012 | } | |
2013 | ||
af098b50 MW |
2014 | /** |
2015 | * Data for an expire callback job | |
2016 | */ | |
2017 | typedef struct { | |
2018 | /* backref to kernel backend */ | |
2019 | private_kernel_wfp_ipsec_t *this; | |
2020 | /* SPI of expiring SA */ | |
b12c53ce | 2021 | uint32_t spi; |
af098b50 MW |
2022 | /* destination address of expiring SA */ |
2023 | host_t *dst; | |
2024 | /* is this a hard expire, or a rekey request? */ | |
2025 | bool hard; | |
2026 | } expire_data_t; | |
2027 | ||
2028 | /** | |
2029 | * Clean up expire data | |
2030 | */ | |
2031 | static void expire_data_destroy(expire_data_t *data) | |
2032 | { | |
2033 | data->dst->destroy(data->dst); | |
2034 | free(data); | |
2035 | } | |
2036 | ||
2037 | /** | |
2038 | * Callback job for SA expiration | |
2039 | */ | |
2040 | static job_requeue_t expire_job(expire_data_t *data) | |
2041 | { | |
2042 | private_kernel_wfp_ipsec_t *this = data->this; | |
b12c53ce | 2043 | uint8_t protocol; |
f81a9497 | 2044 | entry_t *entry = NULL; |
af098b50 MW |
2045 | sa_entry_t key = { |
2046 | .spi = data->spi, | |
2047 | .dst = data->dst, | |
2048 | }; | |
2049 | ||
2050 | if (data->hard) | |
2051 | { | |
2052 | this->mutex->lock(this->mutex); | |
2053 | entry = this->isas->remove(this->isas, &key); | |
2054 | this->mutex->unlock(this->mutex); | |
2055 | if (entry) | |
2056 | { | |
2057 | protocol = entry->isa.protocol; | |
af098b50 MW |
2058 | if (entry->osa.dst) |
2059 | { | |
2060 | key.dst = entry->osa.dst; | |
2061 | key.spi = entry->osa.spi; | |
2062 | this->osas->remove(this->osas, &key); | |
2063 | } | |
2064 | entry_destroy(this, entry); | |
2065 | } | |
2066 | } | |
2067 | else | |
2068 | { | |
2069 | this->mutex->lock(this->mutex); | |
2070 | entry = this->isas->get(this->isas, &key); | |
2071 | if (entry) | |
2072 | { | |
2073 | protocol = entry->isa.protocol; | |
af098b50 MW |
2074 | } |
2075 | this->mutex->unlock(this->mutex); | |
2076 | } | |
2077 | ||
f81a9497 | 2078 | if (entry) |
af098b50 | 2079 | { |
8394ea2a TB |
2080 | charon->kernel->expire(charon->kernel, protocol, data->spi, data->dst, |
2081 | data->hard); | |
af098b50 MW |
2082 | } |
2083 | ||
2084 | return JOB_REQUEUE_NONE; | |
2085 | } | |
2086 | ||
2087 | /** | |
2088 | * Schedule an expire event for an SA | |
2089 | */ | |
b12c53ce AS |
2090 | static void schedule_expire(private_kernel_wfp_ipsec_t *this, uint32_t spi, |
2091 | host_t *dst, uint32_t lifetime, bool hard) | |
af098b50 MW |
2092 | { |
2093 | expire_data_t *data; | |
2094 | ||
2095 | INIT(data, | |
2096 | .this = this, | |
2097 | .spi = spi, | |
2098 | .dst = dst->clone(dst), | |
2099 | .hard = hard, | |
2100 | ); | |
2101 | ||
2102 | lib->scheduler->schedule_job(lib->scheduler, (job_t*) | |
2103 | callback_job_create((void*)expire_job, data, | |
2104 | (void*)expire_data_destroy, NULL), | |
2105 | lifetime); | |
2106 | } | |
2107 | ||
8d91eee3 | 2108 | METHOD(kernel_ipsec_t, add_sa, status_t, |
89da06ac TB |
2109 | private_kernel_wfp_ipsec_t *this, kernel_ipsec_sa_id_t *id, |
2110 | kernel_ipsec_add_sa_t *data) | |
8d91eee3 | 2111 | { |
96ab7a80 MW |
2112 | host_t *local, *remote; |
2113 | entry_t *entry; | |
96ab7a80 | 2114 | |
89da06ac | 2115 | if (data->inbound) |
96ab7a80 | 2116 | { |
f351d9ef | 2117 | /* comes first, create new entry */ |
89da06ac TB |
2118 | local = id->dst->clone(id->dst); |
2119 | remote = id->src->clone(id->src); | |
f351d9ef MW |
2120 | |
2121 | INIT(entry, | |
89da06ac | 2122 | .reqid = data->reqid, |
f351d9ef | 2123 | .isa = { |
89da06ac | 2124 | .spi = id->spi, |
f351d9ef | 2125 | .dst = local, |
89da06ac TB |
2126 | .protocol = id->proto, |
2127 | .lifetime = data->lifetime->time.life, | |
f351d9ef | 2128 | .encr = { |
89da06ac TB |
2129 | .alg = data->enc_alg, |
2130 | .key = chunk_clone(data->enc_key), | |
f351d9ef MW |
2131 | }, |
2132 | .integ = { | |
89da06ac TB |
2133 | .alg = data->int_alg, |
2134 | .key = chunk_clone(data->int_key), | |
f351d9ef MW |
2135 | }, |
2136 | }, | |
2137 | .sps = array_create(0, 0), | |
2138 | .local = local, | |
2139 | .remote = remote, | |
89da06ac TB |
2140 | .mode = data->mode, |
2141 | .encap = data->encap, | |
f351d9ef MW |
2142 | ); |
2143 | ||
89da06ac | 2144 | if (data->lifetime->time.life) |
af098b50 | 2145 | { |
89da06ac TB |
2146 | schedule_expire(this, id->spi, local, |
2147 | data->lifetime->time.life, TRUE); | |
af098b50 | 2148 | } |
89da06ac TB |
2149 | if (data->lifetime->time.rekey && |
2150 | data->lifetime->time.rekey != data->lifetime->time.life) | |
af098b50 | 2151 | { |
89da06ac TB |
2152 | schedule_expire(this, id->spi, local, |
2153 | data->lifetime->time.rekey, FALSE); | |
af098b50 MW |
2154 | } |
2155 | ||
f351d9ef | 2156 | this->mutex->lock(this->mutex); |
89da06ac | 2157 | this->tsas->put(this->tsas, (void*)(uintptr_t)data->reqid, entry); |
f351d9ef MW |
2158 | this->isas->put(this->isas, &entry->isa, entry); |
2159 | this->mutex->unlock(this->mutex); | |
96ab7a80 MW |
2160 | } |
2161 | else | |
2162 | { | |
f351d9ef MW |
2163 | /* comes after inbound, update entry */ |
2164 | this->mutex->lock(this->mutex); | |
89da06ac | 2165 | entry = this->tsas->remove(this->tsas, (void*)(uintptr_t)data->reqid); |
f351d9ef | 2166 | this->mutex->unlock(this->mutex); |
96ab7a80 | 2167 | |
f351d9ef MW |
2168 | if (!entry) |
2169 | { | |
2170 | DBG1(DBG_KNL, "adding outbound SA failed, no inbound SA found " | |
89da06ac | 2171 | "for reqid %u ", data->reqid); |
f351d9ef MW |
2172 | return NOT_FOUND; |
2173 | } | |
2174 | /* TODO: should we check for local/remote, mode etc.? */ | |
2175 | ||
2176 | entry->osa = (sa_entry_t){ | |
89da06ac | 2177 | .spi = id->spi, |
f351d9ef | 2178 | .dst = entry->remote, |
89da06ac TB |
2179 | .protocol = id->proto, |
2180 | .lifetime = data->lifetime->time.life, | |
96ab7a80 | 2181 | .encr = { |
89da06ac TB |
2182 | .alg = data->enc_alg, |
2183 | .key = chunk_clone(data->enc_key), | |
96ab7a80 MW |
2184 | }, |
2185 | .integ = { | |
89da06ac TB |
2186 | .alg = data->int_alg, |
2187 | .key = chunk_clone(data->int_key), | |
96ab7a80 | 2188 | }, |
f351d9ef MW |
2189 | }; |
2190 | ||
2191 | this->mutex->lock(this->mutex); | |
2192 | this->osas->put(this->osas, &entry->osa, entry); | |
2193 | this->mutex->unlock(this->mutex); | |
96ab7a80 | 2194 | } |
96ab7a80 | 2195 | |
f351d9ef | 2196 | return SUCCESS; |
8d91eee3 MW |
2197 | } |
2198 | ||
2199 | METHOD(kernel_ipsec_t, update_sa, status_t, | |
89da06ac TB |
2200 | private_kernel_wfp_ipsec_t *this, kernel_ipsec_sa_id_t *id, |
2201 | kernel_ipsec_update_sa_t *data) | |
8d91eee3 | 2202 | { |
5a5b9925 MW |
2203 | entry_t *entry; |
2204 | sa_entry_t key = { | |
89da06ac TB |
2205 | .dst = id->dst, |
2206 | .spi = id->spi, | |
5a5b9925 MW |
2207 | }; |
2208 | UINT64 sa_id = 0; | |
2209 | IPSEC_SA_CONTEXT1 *ctx; | |
2210 | IPSEC_V4_UDP_ENCAPSULATION0 ports; | |
2211 | UINT32 flags = IPSEC_SA_DETAILS_UPDATE_TRAFFIC; | |
2212 | DWORD res; | |
2213 | ||
2214 | this->mutex->lock(this->mutex); | |
2215 | entry = this->osas->get(this->osas, &key); | |
2216 | this->mutex->unlock(this->mutex); | |
2217 | ||
2218 | if (entry) | |
2219 | { | |
2220 | /* outbound entry, nothing to do */ | |
2221 | return SUCCESS; | |
2222 | } | |
2223 | ||
2224 | this->mutex->lock(this->mutex); | |
2225 | entry = this->isas->get(this->isas, &key); | |
2226 | if (entry) | |
2227 | { | |
2228 | /* inbound entry, do update */ | |
2229 | sa_id = entry->sa_id; | |
1f060357 TB |
2230 | ports.localUdpEncapPort = data->new_dst->get_port(data->new_dst); |
2231 | ports.remoteUdpEncapPort = data->new_src->get_port(data->new_src); | |
5a5b9925 MW |
2232 | } |
2233 | this->mutex->unlock(this->mutex); | |
2234 | ||
2235 | if (!sa_id) | |
2236 | { | |
2237 | return NOT_FOUND; | |
2238 | } | |
2239 | ||
2240 | res = IPsecSaContextGetById1(this->handle, sa_id, &ctx); | |
2241 | if (res != ERROR_SUCCESS) | |
2242 | { | |
2243 | DBG1(DBG_KNL, "getting WFP SA context for updated failed: 0x%08x", res); | |
2244 | return FAILED; | |
2245 | } | |
89da06ac TB |
2246 | if (!hosts2traffic(this, data->new_dst, data->new_src, &ctx->inboundSa->traffic) || |
2247 | !hosts2traffic(this, data->new_dst, data->new_src, &ctx->outboundSa->traffic)) | |
5a5b9925 MW |
2248 | { |
2249 | FwpmFreeMemory0((void**)&ctx); | |
2250 | return FAILED; | |
2251 | } | |
2252 | ||
89da06ac | 2253 | if (data->new_encap != data->encap) |
5a5b9925 | 2254 | { |
89da06ac | 2255 | if (data->new_encap) |
5a5b9925 MW |
2256 | { |
2257 | ctx->inboundSa->udpEncapsulation = &ports; | |
2258 | ctx->outboundSa->udpEncapsulation = &ports; | |
2259 | } | |
2260 | else | |
2261 | { | |
2262 | ctx->inboundSa->udpEncapsulation = NULL; | |
2263 | ctx->outboundSa->udpEncapsulation = NULL; | |
2264 | } | |
2265 | flags |= IPSEC_SA_DETAILS_UPDATE_UDP_ENCAPSULATION; | |
2266 | } | |
2267 | ||
2268 | res = IPsecSaContextUpdate0(this->handle, flags, ctx); | |
2269 | FwpmFreeMemory0((void**)&ctx); | |
2270 | if (res != ERROR_SUCCESS) | |
2271 | { | |
2272 | DBG1(DBG_KNL, "updating WFP SA context failed: 0x%08x", res); | |
2273 | return FAILED; | |
2274 | } | |
2275 | ||
2276 | this->mutex->lock(this->mutex); | |
2277 | entry = this->isas->remove(this->isas, &key); | |
2278 | if (entry) | |
2279 | { | |
2280 | key.spi = entry->osa.spi; | |
2281 | key.dst = entry->osa.dst; | |
2282 | this->osas->remove(this->osas, &key); | |
2283 | ||
1b3af3e3 TB |
2284 | if (data->new_reqid) |
2285 | { | |
2286 | entry->reqid = data->new_reqid; | |
2287 | } | |
5a5b9925 MW |
2288 | entry->local->destroy(entry->local); |
2289 | entry->remote->destroy(entry->remote); | |
89da06ac TB |
2290 | entry->local = data->new_dst->clone(data->new_dst); |
2291 | entry->remote = data->new_src->clone(data->new_src); | |
5a5b9925 MW |
2292 | entry->isa.dst = entry->local; |
2293 | entry->osa.dst = entry->remote; | |
2294 | ||
2295 | this->isas->put(this->isas, &entry->isa, entry); | |
2296 | this->osas->put(this->osas, &entry->osa, entry); | |
2297 | ||
2298 | manage_routes(this, entry, FALSE); | |
2299 | manage_routes(this, entry, TRUE); | |
2300 | } | |
2301 | this->mutex->unlock(this->mutex); | |
2302 | ||
2303 | return SUCCESS; | |
8d91eee3 MW |
2304 | } |
2305 | ||
2306 | METHOD(kernel_ipsec_t, query_sa, status_t, | |
89da06ac TB |
2307 | private_kernel_wfp_ipsec_t *this, kernel_ipsec_sa_id_t *id, |
2308 | kernel_ipsec_query_sa_t *data, uint64_t *bytes, uint64_t *packets, | |
2309 | time_t *time) | |
8d91eee3 | 2310 | { |
b50d486e MW |
2311 | /* It does not seem that WFP provides any means of getting per-SA traffic |
2312 | * statistics. IPsecGetStatistics0/1() provides global stats, and | |
2313 | * IPsecSaContextEnum0/1() and IPsecSaEnum0/1() return the configured | |
2314 | * values only. */ | |
8d91eee3 MW |
2315 | return NOT_SUPPORTED; |
2316 | } | |
2317 | ||
2318 | METHOD(kernel_ipsec_t, del_sa, status_t, | |
89da06ac TB |
2319 | private_kernel_wfp_ipsec_t *this, kernel_ipsec_sa_id_t *id, |
2320 | kernel_ipsec_del_sa_t *data) | |
8d91eee3 | 2321 | { |
96ab7a80 | 2322 | entry_t *entry; |
f351d9ef | 2323 | sa_entry_t key = { |
89da06ac TB |
2324 | .dst = id->dst, |
2325 | .spi = id->spi, | |
96ab7a80 MW |
2326 | }; |
2327 | ||
2328 | this->mutex->lock(this->mutex); | |
f351d9ef MW |
2329 | entry = this->isas->remove(this->isas, &key); |
2330 | this->mutex->unlock(this->mutex); | |
96ab7a80 | 2331 | |
96ab7a80 MW |
2332 | if (entry) |
2333 | { | |
f351d9ef MW |
2334 | /* keep entry until removal of outbound */ |
2335 | return SUCCESS; | |
96ab7a80 MW |
2336 | } |
2337 | ||
f351d9ef MW |
2338 | this->mutex->lock(this->mutex); |
2339 | entry = this->osas->remove(this->osas, &key); | |
96ab7a80 MW |
2340 | this->mutex->unlock(this->mutex); |
2341 | ||
f351d9ef MW |
2342 | if (entry) |
2343 | { | |
2344 | entry_destroy(this, entry); | |
2345 | return SUCCESS; | |
2346 | } | |
2347 | ||
2348 | return NOT_FOUND; | |
8d91eee3 MW |
2349 | } |
2350 | ||
2351 | METHOD(kernel_ipsec_t, flush_sas, status_t, | |
2352 | private_kernel_wfp_ipsec_t *this) | |
2353 | { | |
2354 | return NOT_SUPPORTED; | |
2355 | } | |
2356 | ||
2357 | METHOD(kernel_ipsec_t, add_policy, status_t, | |
89da06ac TB |
2358 | private_kernel_wfp_ipsec_t *this, kernel_ipsec_policy_id_t *id, |
2359 | kernel_ipsec_manage_policy_t *data) | |
8d91eee3 | 2360 | { |
96ab7a80 | 2361 | status_t status = SUCCESS; |
96ab7a80 MW |
2362 | entry_t *entry; |
2363 | sp_entry_t *sp; | |
f351d9ef | 2364 | sa_entry_t key = { |
89da06ac TB |
2365 | .spi = data->sa->esp.use ? data->sa->esp.spi : data->sa->ah.spi, |
2366 | .dst = data->dst, | |
f351d9ef | 2367 | }; |
96ab7a80 | 2368 | |
89da06ac | 2369 | if (data->sa->esp.use && data->sa->ah.use) |
96ab7a80 | 2370 | { |
f351d9ef | 2371 | return NOT_SUPPORTED; |
96ab7a80 MW |
2372 | } |
2373 | ||
89da06ac | 2374 | switch (data->type) |
b9349298 MW |
2375 | { |
2376 | case POLICY_IPSEC: | |
2377 | break; | |
2378 | case POLICY_PASS: | |
2379 | case POLICY_DROP: | |
2380 | return NOT_SUPPORTED; | |
2381 | } | |
2382 | ||
89da06ac | 2383 | switch (id->dir) |
96ab7a80 | 2384 | { |
f351d9ef MW |
2385 | case POLICY_OUT: |
2386 | break; | |
2387 | case POLICY_IN: | |
2388 | case POLICY_FWD: | |
2389 | /* not required */ | |
2390 | return SUCCESS; | |
2391 | default: | |
2392 | return NOT_SUPPORTED; | |
96ab7a80 | 2393 | } |
f351d9ef | 2394 | |
89da06ac | 2395 | switch (data->prio) |
96ab7a80 | 2396 | { |
f351d9ef MW |
2397 | case POLICY_PRIORITY_DEFAULT: |
2398 | break; | |
f351d9ef | 2399 | case POLICY_PRIORITY_ROUTED: |
89da06ac TB |
2400 | if (!add_trap(this, data->sa->reqid, FALSE, data->src, data->dst, |
2401 | id->src_ts, id->dst_ts)) | |
6de78870 MW |
2402 | { |
2403 | return FAILED; | |
2404 | } | |
89da06ac | 2405 | if (data->sa->mode == MODE_TUNNEL) |
c6f189e4 | 2406 | { |
89da06ac TB |
2407 | if (!add_trap(this, data->sa->reqid, TRUE, data->src, data->dst, |
2408 | id->src_ts, id->dst_ts)) | |
6de78870 MW |
2409 | { |
2410 | return FAILED; | |
2411 | } | |
c6f189e4 | 2412 | } |
6de78870 | 2413 | return SUCCESS; |
b9349298 | 2414 | case POLICY_PRIORITY_FALLBACK: |
f351d9ef MW |
2415 | default: |
2416 | return NOT_SUPPORTED; | |
96ab7a80 MW |
2417 | } |
2418 | ||
2419 | this->mutex->lock(this->mutex); | |
f351d9ef | 2420 | entry = this->osas->get(this->osas, &key); |
96ab7a80 MW |
2421 | if (entry) |
2422 | { | |
89da06ac | 2423 | if (data->sa->mode == MODE_TUNNEL || array_count(entry->sps) == 0) |
149fc48e | 2424 | { |
f351d9ef | 2425 | INIT(sp, |
89da06ac TB |
2426 | .src = id->src_ts->clone(id->src_ts), |
2427 | .dst = id->dst_ts->clone(id->dst_ts), | |
f351d9ef MW |
2428 | ); |
2429 | array_insert(entry->sps, -1, sp); | |
89da06ac | 2430 | if (array_count(entry->sps) == data->sa->policy_count) |
149fc48e | 2431 | { |
4b512803 MW |
2432 | if (!install(this, entry)) |
2433 | { | |
2434 | status = FAILED; | |
2435 | } | |
149fc48e MW |
2436 | } |
2437 | } | |
f351d9ef MW |
2438 | else |
2439 | { | |
2440 | /* TODO: reinstall with a filter using multiple TS? | |
2441 | * Filters are ANDed for a match, but we could install a filter | |
2442 | * with the inverse TS set using NOT-matches... */ | |
4b512803 MW |
2443 | DBG1(DBG_KNL, "multiple transport mode traffic selectors not " |
2444 | "supported by WFP"); | |
f351d9ef MW |
2445 | status = NOT_SUPPORTED; |
2446 | } | |
96ab7a80 MW |
2447 | } |
2448 | else | |
2449 | { | |
f351d9ef | 2450 | DBG1(DBG_KNL, "adding SP failed, no SA found for SPI 0x%08x", key.spi); |
96ab7a80 MW |
2451 | status = FAILED; |
2452 | } | |
2453 | this->mutex->unlock(this->mutex); | |
2454 | ||
2455 | return status; | |
8d91eee3 MW |
2456 | } |
2457 | ||
2458 | METHOD(kernel_ipsec_t, query_policy, status_t, | |
89da06ac TB |
2459 | private_kernel_wfp_ipsec_t *this, kernel_ipsec_policy_id_t *id, |
2460 | kernel_ipsec_query_policy_t *data, time_t *use_time) | |
8d91eee3 | 2461 | { |
b50d486e | 2462 | /* see query_sa() for some notes */ |
8d91eee3 MW |
2463 | return NOT_SUPPORTED; |
2464 | } | |
2465 | ||
2466 | METHOD(kernel_ipsec_t, del_policy, status_t, | |
89da06ac TB |
2467 | private_kernel_wfp_ipsec_t *this, kernel_ipsec_policy_id_t *id, |
2468 | kernel_ipsec_manage_policy_t *data) | |
8d91eee3 | 2469 | { |
89da06ac | 2470 | if (id->dir == POLICY_OUT && data->prio == POLICY_PRIORITY_ROUTED) |
c6f189e4 | 2471 | { |
89da06ac TB |
2472 | if (remove_trap(this, data->sa->reqid, FALSE, id->src_ts, |
2473 | id->dst_ts)) | |
c6f189e4 | 2474 | { |
89da06ac TB |
2475 | remove_trap(this, data->sa->reqid, TRUE, id->src_ts, |
2476 | id->dst_ts); | |
c6f189e4 MW |
2477 | return SUCCESS; |
2478 | } | |
2479 | return NOT_FOUND; | |
2480 | } | |
f351d9ef MW |
2481 | /* not required, as we delete the whole SA/SP set during del_sa() */ |
2482 | return SUCCESS; | |
8d91eee3 MW |
2483 | } |
2484 | ||
2485 | METHOD(kernel_ipsec_t, flush_policies, status_t, | |
2486 | private_kernel_wfp_ipsec_t *this) | |
2487 | { | |
2488 | return NOT_SUPPORTED; | |
2489 | } | |
2490 | ||
f206e069 MW |
2491 | /** |
2492 | * Add a bypass policy for a specific UDP port | |
2493 | */ | |
2494 | static bool add_bypass(private_kernel_wfp_ipsec_t *this, | |
b12c53ce | 2495 | int family, uint16_t port, bool inbound, UINT64 *luid) |
f206e069 MW |
2496 | { |
2497 | FWPM_FILTER_CONDITION0 *cond, *conds = NULL; | |
2498 | int count = 0; | |
2499 | DWORD res; | |
2500 | UINT64 weight = 0xff00000000000000; | |
2501 | FWPM_FILTER0 filter = { | |
2502 | .displayData = { | |
2503 | .name = L"charon IKE bypass", | |
2504 | }, | |
2505 | .action = { | |
2506 | .type = FWP_ACTION_PERMIT, | |
2507 | }, | |
2508 | .weight = { | |
2509 | .type = FWP_UINT64, | |
2510 | .uint64 = &weight, | |
2511 | }, | |
2512 | }; | |
2513 | ||
2514 | switch (family) | |
2515 | { | |
2516 | case AF_INET: | |
2517 | filter.layerKey = inbound ? FWPM_LAYER_INBOUND_TRANSPORT_V4 | |
2518 | : FWPM_LAYER_OUTBOUND_TRANSPORT_V4; | |
2519 | break; | |
2520 | case AF_INET6: | |
2521 | filter.layerKey = inbound ? FWPM_LAYER_INBOUND_TRANSPORT_V6 | |
2522 | : FWPM_LAYER_OUTBOUND_TRANSPORT_V6; | |
2523 | break; | |
2524 | default: | |
2525 | return FALSE; | |
2526 | } | |
2527 | ||
2528 | cond = append_condition(&conds, &count); | |
2529 | cond->fieldKey = FWPM_CONDITION_IP_PROTOCOL; | |
2530 | cond->matchType = FWP_MATCH_EQUAL; | |
2531 | cond->conditionValue.type = FWP_UINT8; | |
2532 | cond->conditionValue.uint8 = IPPROTO_UDP; | |
2533 | ||
2534 | cond = append_condition(&conds, &count); | |
2535 | cond->fieldKey = FWPM_CONDITION_IP_LOCAL_PORT; | |
2536 | cond->matchType = FWP_MATCH_EQUAL; | |
2537 | cond->conditionValue.type = FWP_UINT16; | |
2538 | cond->conditionValue.uint16 = port; | |
2539 | ||
2540 | filter.numFilterConditions = count; | |
2541 | filter.filterCondition = conds; | |
2542 | ||
2543 | res = FwpmFilterAdd0(this->handle, &filter, NULL, luid); | |
2544 | free_conditions(conds, count); | |
2545 | if (res != ERROR_SUCCESS) | |
2546 | { | |
6de78870 | 2547 | DBG1(DBG_KNL, "installing WFP bypass filter failed: 0x%08x", res); |
f206e069 MW |
2548 | return FALSE; |
2549 | } | |
2550 | return TRUE; | |
2551 | } | |
2552 | ||
8d91eee3 MW |
2553 | METHOD(kernel_ipsec_t, bypass_socket, bool, |
2554 | private_kernel_wfp_ipsec_t *this, int fd, int family) | |
2555 | { | |
f206e069 MW |
2556 | union { |
2557 | struct sockaddr sa; | |
2558 | SOCKADDR_IN in; | |
2559 | SOCKADDR_IN6 in6; | |
2560 | } saddr; | |
2561 | int addrlen = sizeof(saddr); | |
2562 | UINT64 filter_out, filter_in = 0; | |
b12c53ce | 2563 | uint16_t port; |
f206e069 MW |
2564 | |
2565 | if (getsockname(fd, &saddr.sa, &addrlen) == SOCKET_ERROR) | |
2566 | { | |
2567 | return FALSE; | |
2568 | } | |
2569 | switch (family) | |
2570 | { | |
2571 | case AF_INET: | |
2572 | port = ntohs(saddr.in.sin_port); | |
2573 | break; | |
2574 | case AF_INET6: | |
2575 | port = ntohs(saddr.in6.sin6_port); | |
2576 | break; | |
2577 | default: | |
2578 | return FALSE; | |
2579 | } | |
2580 | ||
2581 | if (!add_bypass(this, family, port, TRUE, &filter_in) || | |
2582 | !add_bypass(this, family, port, FALSE, &filter_out)) | |
2583 | { | |
2584 | if (filter_in) | |
2585 | { | |
2586 | FwpmFilterDeleteById0(this->handle, filter_in); | |
2587 | } | |
2588 | return FALSE; | |
2589 | } | |
2590 | ||
2591 | this->mutex->lock(this->mutex); | |
2592 | array_insert(this->bypass, ARRAY_TAIL, &filter_in); | |
2593 | array_insert(this->bypass, ARRAY_TAIL, &filter_out); | |
2594 | this->mutex->unlock(this->mutex); | |
2595 | ||
2596 | return TRUE; | |
8d91eee3 MW |
2597 | } |
2598 | ||
2599 | METHOD(kernel_ipsec_t, enable_udp_decap, bool, | |
b12c53ce | 2600 | private_kernel_wfp_ipsec_t *this, int fd, int family, uint16_t port) |
8d91eee3 | 2601 | { |
f206e069 | 2602 | return FALSE; |
8d91eee3 MW |
2603 | } |
2604 | ||
2605 | METHOD(kernel_ipsec_t, destroy, void, | |
2606 | private_kernel_wfp_ipsec_t *this) | |
2607 | { | |
f206e069 MW |
2608 | UINT64 filter; |
2609 | ||
2610 | while (array_remove(this->bypass, ARRAY_TAIL, &filter)) | |
2611 | { | |
2612 | FwpmFilterDeleteById0(this->handle, filter); | |
2613 | } | |
ebb9362d MW |
2614 | if (this->handle) |
2615 | { | |
28683140 MW |
2616 | if (this->event) |
2617 | { | |
2618 | FwpmNetEventUnsubscribe0(this->handle, this->event); | |
2619 | } | |
f5ddda7f | 2620 | FwpmProviderDeleteByKey0(this->handle, &this->provider.providerKey); |
ebb9362d MW |
2621 | FwpmEngineClose0(this->handle); |
2622 | } | |
f206e069 | 2623 | array_destroy(this->bypass); |
f351d9ef MW |
2624 | this->tsas->destroy(this->tsas); |
2625 | this->isas->destroy(this->isas); | |
2626 | this->osas->destroy(this->osas); | |
b714746e | 2627 | this->routes->destroy(this->routes); |
c6f189e4 | 2628 | this->traps->destroy(this->traps); |
96ab7a80 | 2629 | this->mutex->destroy(this->mutex); |
8d91eee3 MW |
2630 | free(this); |
2631 | } | |
2632 | ||
2633 | /* | |
2634 | * Described in header. | |
2635 | */ | |
2636 | kernel_wfp_ipsec_t *kernel_wfp_ipsec_create() | |
2637 | { | |
2638 | private_kernel_wfp_ipsec_t *this; | |
ebb9362d MW |
2639 | DWORD res; |
2640 | FWPM_SESSION0 session = { | |
2641 | .displayData = { | |
2642 | .name = L"charon", | |
2643 | .description = L"strongSwan IKE kernel-wfp backend", | |
2644 | }, | |
2645 | }; | |
8d91eee3 MW |
2646 | |
2647 | INIT(this, | |
2648 | .public = { | |
2649 | .interface = { | |
2650 | .get_features = _get_features, | |
2651 | .get_spi = _get_spi, | |
2652 | .get_cpi = _get_cpi, | |
2653 | .add_sa = _add_sa, | |
2654 | .update_sa = _update_sa, | |
2655 | .query_sa = _query_sa, | |
2656 | .del_sa = _del_sa, | |
2657 | .flush_sas = _flush_sas, | |
2658 | .add_policy = _add_policy, | |
2659 | .query_policy = _query_policy, | |
2660 | .del_policy = _del_policy, | |
2661 | .flush_policies = _flush_policies, | |
2662 | .bypass_socket = _bypass_socket, | |
2663 | .enable_udp_decap = _enable_udp_decap, | |
2664 | .destroy = _destroy, | |
2665 | }, | |
2666 | }, | |
f5ddda7f MW |
2667 | .provider = { |
2668 | .displayData = { | |
2669 | .name = L"charon", | |
2670 | .description = L"strongSwan IKE kernel-wfp backend", | |
2671 | }, | |
2672 | .providerKey = { 0x59cdae2e, 0xf6bb, 0x4c09, | |
2673 | { 0xa9,0x59,0x9d,0x91,0xac,0xaf,0xf9,0x19 }}, | |
2674 | }, | |
b714746e | 2675 | .mutex = mutex_create(MUTEX_TYPE_RECURSIVE), |
f206e069 | 2676 | .bypass = array_create(sizeof(UINT64), 2), |
f351d9ef MW |
2677 | .tsas = hashtable_create(hashtable_hash_ptr, hashtable_equals_ptr, 4), |
2678 | .isas = hashtable_create((void*)hash_sa, (void*)equals_sa, 4), | |
2679 | .osas = hashtable_create((void*)hash_sa, (void*)equals_sa, 4), | |
b714746e | 2680 | .routes = hashtable_create((void*)hash_route, (void*)equals_route, 4), |
c6f189e4 | 2681 | .traps = hashtable_create((void*)hash_trap, (void*)equals_trap, 4), |
8d91eee3 MW |
2682 | ); |
2683 | ||
bbe42a1f MW |
2684 | if (!init_spi(this)) |
2685 | { | |
2686 | destroy(this); | |
2687 | return NULL; | |
2688 | } | |
2689 | ||
ebb9362d MW |
2690 | res = FwpmEngineOpen0(NULL, RPC_C_AUTHN_WINNT, NULL, &session, |
2691 | &this->handle); | |
2692 | if (res != ERROR_SUCCESS) | |
2693 | { | |
2694 | DBG1(DBG_KNL, "opening WFP engine failed: 0x%08x", res); | |
2695 | destroy(this); | |
2696 | return NULL; | |
2697 | } | |
2698 | ||
f5ddda7f MW |
2699 | res = FwpmProviderAdd0(this->handle, &this->provider, NULL); |
2700 | if (res != ERROR_SUCCESS && res != FWP_E_ALREADY_EXISTS) | |
2701 | { | |
2702 | DBG1(DBG_KNL, "registering WFP provider failed: 0x%08x", res); | |
2703 | destroy(this); | |
2704 | return NULL; | |
2705 | } | |
2706 | ||
28683140 MW |
2707 | if (!register_events(this)) |
2708 | { | |
2709 | destroy(this); | |
2710 | return NULL; | |
2711 | } | |
2712 | ||
8d91eee3 | 2713 | return &this->public; |
ebb9362d | 2714 | } |