Commit | Line | Data |
---|---|---|
4638de5a KM |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* Multipath TCP | |
3 | * | |
4 | * Copyright (c) 2022, Intel Corporation. | |
5 | */ | |
6 | ||
7 | #include "protocol.h" | |
d2d21f17 | 8 | #include "mib.h" |
76a86686 | 9 | #include "mptcp_pm_gen.h" |
4638de5a KM |
10 | |
11 | void mptcp_free_local_addr_list(struct mptcp_sock *msk) | |
12 | { | |
13 | struct mptcp_pm_addr_entry *entry, *tmp; | |
14 | struct sock *sk = (struct sock *)msk; | |
15 | LIST_HEAD(free_list); | |
16 | ||
17 | if (!mptcp_pm_is_userspace(msk)) | |
18 | return; | |
19 | ||
20 | spin_lock_bh(&msk->pm.lock); | |
21 | list_splice_init(&msk->pm.userspace_pm_local_addr_list, &free_list); | |
22 | spin_unlock_bh(&msk->pm.lock); | |
23 | ||
24 | list_for_each_entry_safe(entry, tmp, &free_list, list) { | |
25 | sock_kfree_s(sk, entry, sizeof(*entry)); | |
26 | } | |
27 | } | |
28 | ||
aa5887dc | 29 | static int mptcp_userspace_pm_append_new_local_addr(struct mptcp_sock *msk, |
6c347be6 GT |
30 | struct mptcp_pm_addr_entry *entry, |
31 | bool needs_id) | |
4638de5a KM |
32 | { |
33 | DECLARE_BITMAP(id_bitmap, MPTCP_PM_MAX_ADDR_ID + 1); | |
34 | struct mptcp_pm_addr_entry *match = NULL; | |
35 | struct sock *sk = (struct sock *)msk; | |
36 | struct mptcp_pm_addr_entry *e; | |
37 | bool addr_match = false; | |
38 | bool id_match = false; | |
39 | int ret = -EINVAL; | |
40 | ||
41 | bitmap_zero(id_bitmap, MPTCP_PM_MAX_ADDR_ID + 1); | |
42 | ||
43 | spin_lock_bh(&msk->pm.lock); | |
44 | list_for_each_entry(e, &msk->pm.userspace_pm_local_addr_list, list) { | |
45 | addr_match = mptcp_addresses_equal(&e->addr, &entry->addr, true); | |
6c347be6 | 46 | if (addr_match && entry->addr.id == 0 && needs_id) |
4638de5a KM |
47 | entry->addr.id = e->addr.id; |
48 | id_match = (e->addr.id == entry->addr.id); | |
49 | if (addr_match && id_match) { | |
50 | match = e; | |
51 | break; | |
52 | } else if (addr_match || id_match) { | |
53 | break; | |
54 | } | |
55 | __set_bit(e->addr.id, id_bitmap); | |
56 | } | |
57 | ||
58 | if (!match && !addr_match && !id_match) { | |
59 | /* Memory for the entry is allocated from the | |
60 | * sock option buffer. | |
61 | */ | |
62 | e = sock_kmalloc(sk, sizeof(*e), GFP_ATOMIC); | |
63 | if (!e) { | |
40c71f76 MB |
64 | ret = -ENOMEM; |
65 | goto append_err; | |
4638de5a KM |
66 | } |
67 | ||
68 | *e = *entry; | |
6c347be6 | 69 | if (!e->addr.id && needs_id) |
4638de5a KM |
70 | e->addr.id = find_next_zero_bit(id_bitmap, |
71 | MPTCP_PM_MAX_ADDR_ID + 1, | |
72 | 1); | |
73 | list_add_tail_rcu(&e->list, &msk->pm.userspace_pm_local_addr_list); | |
77e4b94a | 74 | msk->pm.local_addr_used++; |
4638de5a KM |
75 | ret = e->addr.id; |
76 | } else if (match) { | |
77 | ret = entry->addr.id; | |
78 | } | |
79 | ||
40c71f76 | 80 | append_err: |
4638de5a KM |
81 | spin_unlock_bh(&msk->pm.lock); |
82 | return ret; | |
83 | } | |
8b201370 | 84 | |
24430f8b GT |
85 | /* If the subflow is closed from the other peer (not via a |
86 | * subflow destroy command then), we want to keep the entry | |
87 | * not to assign the same ID to another address and to be | |
88 | * able to send RM_ADDR after the removal of the subflow. | |
89 | */ | |
90 | static int mptcp_userspace_pm_delete_local_addr(struct mptcp_sock *msk, | |
91 | struct mptcp_pm_addr_entry *addr) | |
92 | { | |
93 | struct mptcp_pm_addr_entry *entry, *tmp; | |
94 | ||
95 | list_for_each_entry_safe(entry, tmp, &msk->pm.userspace_pm_local_addr_list, list) { | |
96 | if (mptcp_addresses_equal(&entry->addr, &addr->addr, false)) { | |
97 | /* TODO: a refcount is needed because the entry can | |
98 | * be used multiple times (e.g. fullmesh mode). | |
99 | */ | |
100 | list_del_rcu(&entry->list); | |
101 | kfree(entry); | |
77e4b94a | 102 | msk->pm.local_addr_used--; |
24430f8b GT |
103 | return 0; |
104 | } | |
105 | } | |
106 | ||
107 | return -EINVAL; | |
108 | } | |
109 | ||
06afe090 GT |
110 | static struct mptcp_pm_addr_entry * |
111 | mptcp_userspace_pm_lookup_addr_by_id(struct mptcp_sock *msk, unsigned int id) | |
112 | { | |
113 | struct mptcp_pm_addr_entry *entry; | |
114 | ||
115 | list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) { | |
116 | if (entry->addr.id == id) | |
117 | return entry; | |
118 | } | |
119 | return NULL; | |
120 | } | |
121 | ||
8b201370 KM |
122 | int mptcp_userspace_pm_get_local_id(struct mptcp_sock *msk, |
123 | struct mptcp_addr_info *skc) | |
124 | { | |
f012d796 | 125 | struct mptcp_pm_addr_entry *entry = NULL, *e, new_entry; |
8b201370 KM |
126 | __be16 msk_sport = ((struct inet_sock *) |
127 | inet_sk((struct sock *)msk))->inet_sport; | |
128 | ||
f012d796 GT |
129 | spin_lock_bh(&msk->pm.lock); |
130 | list_for_each_entry(e, &msk->pm.userspace_pm_local_addr_list, list) { | |
131 | if (mptcp_addresses_equal(&e->addr, skc, false)) { | |
132 | entry = e; | |
133 | break; | |
134 | } | |
135 | } | |
136 | spin_unlock_bh(&msk->pm.lock); | |
137 | if (entry) | |
138 | return entry->addr.id; | |
139 | ||
8b201370 KM |
140 | memset(&new_entry, 0, sizeof(struct mptcp_pm_addr_entry)); |
141 | new_entry.addr = *skc; | |
142 | new_entry.addr.id = 0; | |
143 | new_entry.flags = MPTCP_PM_ADDR_FLAG_IMPLICIT; | |
144 | ||
145 | if (new_entry.addr.port == msk_sport) | |
146 | new_entry.addr.port = 0; | |
147 | ||
6c347be6 | 148 | return mptcp_userspace_pm_append_new_local_addr(msk, &new_entry, true); |
8b201370 | 149 | } |
9ab4807c | 150 | |
6834097f MBN |
151 | bool mptcp_userspace_pm_is_backup(struct mptcp_sock *msk, |
152 | struct mptcp_addr_info *skc) | |
153 | { | |
154 | struct mptcp_pm_addr_entry *entry; | |
155 | bool backup = false; | |
156 | ||
157 | spin_lock_bh(&msk->pm.lock); | |
158 | list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) { | |
159 | if (mptcp_addresses_equal(&entry->addr, skc, false)) { | |
160 | backup = !!(entry->flags & MPTCP_PM_ADDR_FLAG_BACKUP); | |
161 | break; | |
162 | } | |
163 | } | |
164 | spin_unlock_bh(&msk->pm.lock); | |
165 | ||
166 | return backup; | |
167 | } | |
168 | ||
1e07938e | 169 | int mptcp_pm_nl_announce_doit(struct sk_buff *skb, struct genl_info *info) |
9ab4807c KM |
170 | { |
171 | struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN]; | |
172 | struct nlattr *addr = info->attrs[MPTCP_PM_ATTR_ADDR]; | |
173 | struct mptcp_pm_addr_entry addr_val; | |
174 | struct mptcp_sock *msk; | |
175 | int err = -EINVAL; | |
14cb0e0b | 176 | struct sock *sk; |
9ab4807c KM |
177 | u32 token_val; |
178 | ||
179 | if (!addr || !token) { | |
180 | GENL_SET_ERR_MSG(info, "missing required inputs"); | |
181 | return err; | |
182 | } | |
183 | ||
184 | token_val = nla_get_u32(token); | |
185 | ||
186 | msk = mptcp_token_get_sock(sock_net(skb->sk), token_val); | |
187 | if (!msk) { | |
188 | NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token"); | |
189 | return err; | |
190 | } | |
191 | ||
14cb0e0b GT |
192 | sk = (struct sock *)msk; |
193 | ||
9ab4807c KM |
194 | if (!mptcp_pm_is_userspace(msk)) { |
195 | GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected"); | |
196 | goto announce_err; | |
197 | } | |
198 | ||
199 | err = mptcp_pm_parse_entry(addr, info, true, &addr_val); | |
200 | if (err < 0) { | |
201 | GENL_SET_ERR_MSG(info, "error parsing local address"); | |
202 | goto announce_err; | |
203 | } | |
204 | ||
205 | if (addr_val.addr.id == 0 || !(addr_val.flags & MPTCP_PM_ADDR_FLAG_SIGNAL)) { | |
206 | GENL_SET_ERR_MSG(info, "invalid addr id or flags"); | |
e0fe1123 | 207 | err = -EINVAL; |
9ab4807c KM |
208 | goto announce_err; |
209 | } | |
210 | ||
6c347be6 | 211 | err = mptcp_userspace_pm_append_new_local_addr(msk, &addr_val, false); |
9ab4807c KM |
212 | if (err < 0) { |
213 | GENL_SET_ERR_MSG(info, "did not match address and id"); | |
214 | goto announce_err; | |
215 | } | |
216 | ||
14cb0e0b | 217 | lock_sock(sk); |
9ab4807c KM |
218 | spin_lock_bh(&msk->pm.lock); |
219 | ||
528cb5f2 | 220 | if (mptcp_pm_alloc_anno_list(msk, &addr_val.addr)) { |
77e4b94a | 221 | msk->pm.add_addr_signaled++; |
9ab4807c KM |
222 | mptcp_pm_announce_addr(msk, &addr_val.addr, false); |
223 | mptcp_pm_nl_addr_send_ack(msk); | |
224 | } | |
225 | ||
226 | spin_unlock_bh(&msk->pm.lock); | |
14cb0e0b | 227 | release_sock(sk); |
9ab4807c KM |
228 | |
229 | err = 0; | |
230 | announce_err: | |
14cb0e0b | 231 | sock_put(sk); |
9ab4807c KM |
232 | return err; |
233 | } | |
d9a4594e | 234 | |
84c531f5 GT |
235 | static int mptcp_userspace_pm_remove_id_zero_address(struct mptcp_sock *msk, |
236 | struct genl_info *info) | |
237 | { | |
238 | struct mptcp_rm_list list = { .nr = 0 }; | |
239 | struct mptcp_subflow_context *subflow; | |
240 | struct sock *sk = (struct sock *)msk; | |
241 | bool has_id_0 = false; | |
242 | int err = -EINVAL; | |
243 | ||
244 | lock_sock(sk); | |
245 | mptcp_for_each_subflow(msk, subflow) { | |
a7cfe776 | 246 | if (READ_ONCE(subflow->local_id) == 0) { |
84c531f5 GT |
247 | has_id_0 = true; |
248 | break; | |
249 | } | |
250 | } | |
251 | if (!has_id_0) { | |
252 | GENL_SET_ERR_MSG(info, "address with id 0 not found"); | |
253 | goto remove_err; | |
254 | } | |
255 | ||
256 | list.ids[list.nr++] = 0; | |
257 | ||
258 | spin_lock_bh(&msk->pm.lock); | |
259 | mptcp_pm_remove_addr(msk, &list); | |
260 | spin_unlock_bh(&msk->pm.lock); | |
261 | ||
262 | err = 0; | |
263 | ||
264 | remove_err: | |
265 | release_sock(sk); | |
266 | return err; | |
267 | } | |
268 | ||
1e07938e | 269 | int mptcp_pm_nl_remove_doit(struct sk_buff *skb, struct genl_info *info) |
d9a4594e KM |
270 | { |
271 | struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN]; | |
272 | struct nlattr *id = info->attrs[MPTCP_PM_ATTR_LOC_ID]; | |
06afe090 | 273 | struct mptcp_pm_addr_entry *match; |
d9a4594e KM |
274 | struct mptcp_pm_addr_entry *entry; |
275 | struct mptcp_sock *msk; | |
276 | LIST_HEAD(free_list); | |
277 | int err = -EINVAL; | |
14cb0e0b | 278 | struct sock *sk; |
d9a4594e KM |
279 | u32 token_val; |
280 | u8 id_val; | |
281 | ||
282 | if (!id || !token) { | |
283 | GENL_SET_ERR_MSG(info, "missing required inputs"); | |
284 | return err; | |
285 | } | |
286 | ||
287 | id_val = nla_get_u8(id); | |
288 | token_val = nla_get_u32(token); | |
289 | ||
290 | msk = mptcp_token_get_sock(sock_net(skb->sk), token_val); | |
291 | if (!msk) { | |
292 | NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token"); | |
293 | return err; | |
294 | } | |
295 | ||
14cb0e0b GT |
296 | sk = (struct sock *)msk; |
297 | ||
d9a4594e KM |
298 | if (!mptcp_pm_is_userspace(msk)) { |
299 | GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected"); | |
b3ac570a | 300 | goto out; |
d9a4594e KM |
301 | } |
302 | ||
84c531f5 GT |
303 | if (id_val == 0) { |
304 | err = mptcp_userspace_pm_remove_id_zero_address(msk, info); | |
b3ac570a | 305 | goto out; |
84c531f5 GT |
306 | } |
307 | ||
14cb0e0b | 308 | lock_sock(sk); |
d9a4594e | 309 | |
06afe090 | 310 | match = mptcp_userspace_pm_lookup_addr_by_id(msk, id_val); |
d9a4594e KM |
311 | if (!match) { |
312 | GENL_SET_ERR_MSG(info, "address with specified id not found"); | |
14cb0e0b | 313 | release_sock(sk); |
b3ac570a | 314 | goto out; |
d9a4594e KM |
315 | } |
316 | ||
317 | list_move(&match->list, &free_list); | |
318 | ||
8b1c94da | 319 | mptcp_pm_remove_addrs(msk, &free_list); |
d9a4594e | 320 | |
14cb0e0b | 321 | release_sock(sk); |
d9a4594e KM |
322 | |
323 | list_for_each_entry_safe(match, entry, &free_list, list) { | |
14cb0e0b | 324 | sock_kfree_s(sk, match, sizeof(*match)); |
d9a4594e KM |
325 | } |
326 | ||
327 | err = 0; | |
b3ac570a | 328 | out: |
14cb0e0b | 329 | sock_put(sk); |
d9a4594e KM |
330 | return err; |
331 | } | |
702c2f64 | 332 | |
1e07938e | 333 | int mptcp_pm_nl_subflow_create_doit(struct sk_buff *skb, struct genl_info *info) |
702c2f64 FW |
334 | { |
335 | struct nlattr *raddr = info->attrs[MPTCP_PM_ATTR_ADDR_REMOTE]; | |
336 | struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN]; | |
337 | struct nlattr *laddr = info->attrs[MPTCP_PM_ATTR_ADDR]; | |
b83fbca1 | 338 | struct mptcp_pm_addr_entry entry = { 0 }; |
702c2f64 | 339 | struct mptcp_addr_info addr_r; |
b83fbca1 | 340 | struct mptcp_pm_local local; |
702c2f64 FW |
341 | struct mptcp_sock *msk; |
342 | int err = -EINVAL; | |
343 | struct sock *sk; | |
344 | u32 token_val; | |
345 | ||
346 | if (!laddr || !raddr || !token) { | |
347 | GENL_SET_ERR_MSG(info, "missing required inputs"); | |
348 | return err; | |
349 | } | |
350 | ||
351 | token_val = nla_get_u32(token); | |
352 | ||
353 | msk = mptcp_token_get_sock(genl_info_net(info), token_val); | |
354 | if (!msk) { | |
355 | NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token"); | |
356 | return err; | |
357 | } | |
358 | ||
a6c85fc6 GT |
359 | sk = (struct sock *)msk; |
360 | ||
702c2f64 FW |
361 | if (!mptcp_pm_is_userspace(msk)) { |
362 | GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected"); | |
363 | goto create_err; | |
364 | } | |
365 | ||
b83fbca1 | 366 | err = mptcp_pm_parse_entry(laddr, info, true, &entry); |
702c2f64 FW |
367 | if (err < 0) { |
368 | NL_SET_ERR_MSG_ATTR(info->extack, laddr, "error parsing local addr"); | |
369 | goto create_err; | |
370 | } | |
371 | ||
b83fbca1 | 372 | if (entry.flags & MPTCP_PM_ADDR_FLAG_SIGNAL) { |
c19ee3c7 GT |
373 | GENL_SET_ERR_MSG(info, "invalid addr flags"); |
374 | err = -EINVAL; | |
375 | goto create_err; | |
376 | } | |
b83fbca1 | 377 | entry.flags |= MPTCP_PM_ADDR_FLAG_SUBFLOW; |
c19ee3c7 | 378 | |
702c2f64 FW |
379 | err = mptcp_pm_parse_addr(raddr, info, &addr_r); |
380 | if (err < 0) { | |
381 | NL_SET_ERR_MSG_ATTR(info->extack, raddr, "error parsing remote addr"); | |
382 | goto create_err; | |
383 | } | |
384 | ||
b83fbca1 | 385 | if (!mptcp_pm_addr_families_match(sk, &entry.addr, &addr_r)) { |
fb00ee4f MB |
386 | GENL_SET_ERR_MSG(info, "families mismatch"); |
387 | err = -EINVAL; | |
388 | goto create_err; | |
389 | } | |
390 | ||
b83fbca1 | 391 | err = mptcp_userspace_pm_append_new_local_addr(msk, &entry, false); |
24430f8b GT |
392 | if (err < 0) { |
393 | GENL_SET_ERR_MSG(info, "did not match address and id"); | |
394 | goto create_err; | |
395 | } | |
396 | ||
b83fbca1 MBN |
397 | local.addr = entry.addr; |
398 | local.flags = entry.flags; | |
399 | local.ifindex = entry.ifindex; | |
702c2f64 | 400 | |
b83fbca1 MBN |
401 | lock_sock(sk); |
402 | err = __mptcp_subflow_connect(sk, &local, &addr_r); | |
702c2f64 FW |
403 | release_sock(sk); |
404 | ||
24430f8b GT |
405 | spin_lock_bh(&msk->pm.lock); |
406 | if (err) | |
b83fbca1 | 407 | mptcp_userspace_pm_delete_local_addr(msk, &entry); |
77e4b94a GT |
408 | else |
409 | msk->pm.subflows++; | |
24430f8b GT |
410 | spin_unlock_bh(&msk->pm.lock); |
411 | ||
702c2f64 | 412 | create_err: |
a6c85fc6 | 413 | sock_put(sk); |
702c2f64 FW |
414 | return err; |
415 | } | |
416 | ||
417 | static struct sock *mptcp_nl_find_ssk(struct mptcp_sock *msk, | |
418 | const struct mptcp_addr_info *local, | |
419 | const struct mptcp_addr_info *remote) | |
420 | { | |
702c2f64 | 421 | struct mptcp_subflow_context *subflow; |
702c2f64 FW |
422 | |
423 | if (local->family != remote->family) | |
424 | return NULL; | |
425 | ||
702c2f64 FW |
426 | mptcp_for_each_subflow(msk, subflow) { |
427 | const struct inet_sock *issk; | |
428 | struct sock *ssk; | |
429 | ||
430 | ssk = mptcp_subflow_tcp_sock(subflow); | |
431 | ||
432 | if (local->family != ssk->sk_family) | |
433 | continue; | |
434 | ||
435 | issk = inet_sk(ssk); | |
436 | ||
437 | switch (ssk->sk_family) { | |
438 | case AF_INET: | |
439 | if (issk->inet_saddr != local->addr.s_addr || | |
440 | issk->inet_daddr != remote->addr.s_addr) | |
441 | continue; | |
442 | break; | |
443 | #if IS_ENABLED(CONFIG_MPTCP_IPV6) | |
444 | case AF_INET6: { | |
445 | const struct ipv6_pinfo *pinfo = inet6_sk(ssk); | |
446 | ||
447 | if (!ipv6_addr_equal(&local->addr6, &pinfo->saddr) || | |
448 | !ipv6_addr_equal(&remote->addr6, &ssk->sk_v6_daddr)) | |
449 | continue; | |
450 | break; | |
451 | } | |
452 | #endif | |
453 | default: | |
454 | continue; | |
455 | } | |
456 | ||
457 | if (issk->inet_sport == local->port && | |
5ccecaec PA |
458 | issk->inet_dport == remote->port) |
459 | return ssk; | |
702c2f64 FW |
460 | } |
461 | ||
5ccecaec | 462 | return NULL; |
702c2f64 FW |
463 | } |
464 | ||
1e07938e | 465 | int mptcp_pm_nl_subflow_destroy_doit(struct sk_buff *skb, struct genl_info *info) |
702c2f64 FW |
466 | { |
467 | struct nlattr *raddr = info->attrs[MPTCP_PM_ATTR_ADDR_REMOTE]; | |
468 | struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN]; | |
469 | struct nlattr *laddr = info->attrs[MPTCP_PM_ATTR_ADDR]; | |
470 | struct mptcp_addr_info addr_l; | |
471 | struct mptcp_addr_info addr_r; | |
472 | struct mptcp_sock *msk; | |
473 | struct sock *sk, *ssk; | |
474 | int err = -EINVAL; | |
475 | u32 token_val; | |
476 | ||
477 | if (!laddr || !raddr || !token) { | |
478 | GENL_SET_ERR_MSG(info, "missing required inputs"); | |
479 | return err; | |
480 | } | |
481 | ||
482 | token_val = nla_get_u32(token); | |
483 | ||
484 | msk = mptcp_token_get_sock(genl_info_net(info), token_val); | |
485 | if (!msk) { | |
486 | NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token"); | |
487 | return err; | |
488 | } | |
489 | ||
a6c85fc6 GT |
490 | sk = (struct sock *)msk; |
491 | ||
702c2f64 FW |
492 | if (!mptcp_pm_is_userspace(msk)) { |
493 | GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected"); | |
494 | goto destroy_err; | |
495 | } | |
496 | ||
497 | err = mptcp_pm_parse_addr(laddr, info, &addr_l); | |
498 | if (err < 0) { | |
499 | NL_SET_ERR_MSG_ATTR(info->extack, laddr, "error parsing local addr"); | |
500 | goto destroy_err; | |
501 | } | |
502 | ||
503 | err = mptcp_pm_parse_addr(raddr, info, &addr_r); | |
504 | if (err < 0) { | |
505 | NL_SET_ERR_MSG_ATTR(info->extack, raddr, "error parsing remote addr"); | |
506 | goto destroy_err; | |
507 | } | |
508 | ||
535d620e GT |
509 | #if IS_ENABLED(CONFIG_MPTCP_IPV6) |
510 | if (addr_l.family == AF_INET && ipv6_addr_v4mapped(&addr_r.addr6)) { | |
511 | ipv6_addr_set_v4mapped(addr_l.addr.s_addr, &addr_l.addr6); | |
512 | addr_l.family = AF_INET6; | |
513 | } | |
514 | if (addr_r.family == AF_INET && ipv6_addr_v4mapped(&addr_l.addr6)) { | |
515 | ipv6_addr_set_v4mapped(addr_r.addr.s_addr, &addr_r.addr6); | |
516 | addr_r.family = AF_INET6; | |
517 | } | |
518 | #endif | |
702c2f64 FW |
519 | if (addr_l.family != addr_r.family) { |
520 | GENL_SET_ERR_MSG(info, "address families do not match"); | |
e0fe1123 | 521 | err = -EINVAL; |
702c2f64 FW |
522 | goto destroy_err; |
523 | } | |
524 | ||
525 | if (!addr_l.port || !addr_r.port) { | |
526 | GENL_SET_ERR_MSG(info, "missing local or remote port"); | |
e0fe1123 | 527 | err = -EINVAL; |
702c2f64 FW |
528 | goto destroy_err; |
529 | } | |
530 | ||
5ccecaec | 531 | lock_sock(sk); |
702c2f64 FW |
532 | ssk = mptcp_nl_find_ssk(msk, &addr_l, &addr_r); |
533 | if (ssk) { | |
534 | struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk); | |
24430f8b | 535 | struct mptcp_pm_addr_entry entry = { .addr = addr_l }; |
702c2f64 | 536 | |
24430f8b GT |
537 | spin_lock_bh(&msk->pm.lock); |
538 | mptcp_userspace_pm_delete_local_addr(msk, &entry); | |
539 | spin_unlock_bh(&msk->pm.lock); | |
702c2f64 FW |
540 | mptcp_subflow_shutdown(sk, ssk, RCV_SHUTDOWN | SEND_SHUTDOWN); |
541 | mptcp_close_ssk(sk, ssk, subflow); | |
d2d21f17 | 542 | MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_RMSUBFLOW); |
702c2f64 FW |
543 | err = 0; |
544 | } else { | |
545 | err = -ESRCH; | |
546 | } | |
5ccecaec | 547 | release_sock(sk); |
702c2f64 | 548 | |
5ccecaec | 549 | destroy_err: |
a6c85fc6 | 550 | sock_put(sk); |
702c2f64 FW |
551 | return err; |
552 | } | |
892f396c | 553 | |
6a42477f | 554 | int mptcp_userspace_pm_set_flags(struct sk_buff *skb, struct genl_info *info) |
892f396c | 555 | { |
6a42477f GT |
556 | struct mptcp_pm_addr_entry loc = { .addr = { .family = AF_UNSPEC }, }; |
557 | struct mptcp_pm_addr_entry rem = { .addr = { .family = AF_UNSPEC }, }; | |
558 | struct nlattr *attr_rem = info->attrs[MPTCP_PM_ATTR_ADDR_REMOTE]; | |
559 | struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN]; | |
560 | struct nlattr *attr = info->attrs[MPTCP_PM_ATTR_ADDR]; | |
561 | struct net *net = sock_net(skb->sk); | |
892f396c KM |
562 | struct mptcp_sock *msk; |
563 | int ret = -EINVAL; | |
14cb0e0b | 564 | struct sock *sk; |
892f396c | 565 | u32 token_val; |
6a42477f | 566 | u8 bkup = 0; |
892f396c KM |
567 | |
568 | token_val = nla_get_u32(token); | |
569 | ||
570 | msk = mptcp_token_get_sock(net, token_val); | |
a4d68b16 GT |
571 | if (!msk) { |
572 | NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token"); | |
892f396c | 573 | return ret; |
a4d68b16 | 574 | } |
892f396c | 575 | |
14cb0e0b GT |
576 | sk = (struct sock *)msk; |
577 | ||
a4d68b16 GT |
578 | if (!mptcp_pm_is_userspace(msk)) { |
579 | GENL_SET_ERR_MSG(info, "userspace PM not selected"); | |
892f396c | 580 | goto set_flags_err; |
a4d68b16 | 581 | } |
892f396c | 582 | |
6a42477f GT |
583 | ret = mptcp_pm_parse_entry(attr, info, false, &loc); |
584 | if (ret < 0) | |
892f396c KM |
585 | goto set_flags_err; |
586 | ||
6a42477f GT |
587 | if (attr_rem) { |
588 | ret = mptcp_pm_parse_entry(attr_rem, info, false, &rem); | |
589 | if (ret < 0) | |
590 | goto set_flags_err; | |
591 | } | |
592 | ||
593 | if (loc.addr.family == AF_UNSPEC || | |
594 | rem.addr.family == AF_UNSPEC) { | |
a4d68b16 | 595 | GENL_SET_ERR_MSG(info, "invalid address families"); |
6a42477f GT |
596 | ret = -EINVAL; |
597 | goto set_flags_err; | |
598 | } | |
599 | ||
600 | if (loc.flags & MPTCP_PM_ADDR_FLAG_BACKUP) | |
601 | bkup = 1; | |
602 | ||
14cb0e0b | 603 | lock_sock(sk); |
6a42477f | 604 | ret = mptcp_pm_nl_mp_prio_send_ack(msk, &loc.addr, &rem.addr, bkup); |
14cb0e0b | 605 | release_sock(sk); |
892f396c KM |
606 | |
607 | set_flags_err: | |
14cb0e0b | 608 | sock_put(sk); |
892f396c KM |
609 | return ret; |
610 | } | |
34e74a5c GT |
611 | |
612 | int mptcp_userspace_pm_dump_addr(struct sk_buff *msg, | |
613 | struct netlink_callback *cb) | |
614 | { | |
615 | struct id_bitmap { | |
616 | DECLARE_BITMAP(map, MPTCP_PM_MAX_ADDR_ID + 1); | |
617 | } *bitmap; | |
618 | const struct genl_info *info = genl_info_dump(cb); | |
619 | struct net *net = sock_net(msg->sk); | |
620 | struct mptcp_pm_addr_entry *entry; | |
621 | struct mptcp_sock *msk; | |
622 | struct nlattr *token; | |
623 | int ret = -EINVAL; | |
624 | struct sock *sk; | |
625 | void *hdr; | |
626 | ||
627 | bitmap = (struct id_bitmap *)cb->ctx; | |
628 | token = info->attrs[MPTCP_PM_ATTR_TOKEN]; | |
629 | ||
630 | msk = mptcp_token_get_sock(net, nla_get_u32(token)); | |
631 | if (!msk) { | |
632 | NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token"); | |
633 | return ret; | |
634 | } | |
635 | ||
636 | sk = (struct sock *)msk; | |
637 | ||
638 | if (!mptcp_pm_is_userspace(msk)) { | |
639 | GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected"); | |
640 | goto out; | |
641 | } | |
642 | ||
643 | lock_sock(sk); | |
644 | spin_lock_bh(&msk->pm.lock); | |
645 | list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) { | |
646 | if (test_bit(entry->addr.id, bitmap->map)) | |
647 | continue; | |
648 | ||
649 | hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, | |
650 | cb->nlh->nlmsg_seq, &mptcp_genl_family, | |
651 | NLM_F_MULTI, MPTCP_PM_CMD_GET_ADDR); | |
652 | if (!hdr) | |
653 | break; | |
654 | ||
655 | if (mptcp_nl_fill_addr(msg, entry) < 0) { | |
656 | genlmsg_cancel(msg, hdr); | |
657 | break; | |
658 | } | |
659 | ||
660 | __set_bit(entry->addr.id, bitmap->map); | |
661 | genlmsg_end(msg, hdr); | |
662 | } | |
663 | spin_unlock_bh(&msk->pm.lock); | |
664 | release_sock(sk); | |
665 | ret = msg->len; | |
666 | ||
667 | out: | |
668 | sock_put(sk); | |
669 | return ret; | |
670 | } | |
d32c8fb1 GT |
671 | |
672 | int mptcp_userspace_pm_get_addr(struct sk_buff *skb, | |
673 | struct genl_info *info) | |
674 | { | |
675 | struct nlattr *attr = info->attrs[MPTCP_PM_ENDPOINT_ADDR]; | |
676 | struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN]; | |
677 | struct mptcp_pm_addr_entry addr, *entry; | |
678 | struct net *net = sock_net(skb->sk); | |
679 | struct mptcp_sock *msk; | |
680 | struct sk_buff *msg; | |
681 | int ret = -EINVAL; | |
682 | struct sock *sk; | |
683 | void *reply; | |
684 | ||
685 | msk = mptcp_token_get_sock(net, nla_get_u32(token)); | |
686 | if (!msk) { | |
687 | NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token"); | |
688 | return ret; | |
689 | } | |
690 | ||
691 | sk = (struct sock *)msk; | |
692 | ||
693 | if (!mptcp_pm_is_userspace(msk)) { | |
694 | GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected"); | |
695 | goto out; | |
696 | } | |
697 | ||
698 | ret = mptcp_pm_parse_entry(attr, info, false, &addr); | |
699 | if (ret < 0) | |
700 | goto out; | |
701 | ||
702 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
703 | if (!msg) { | |
704 | ret = -ENOMEM; | |
705 | goto out; | |
706 | } | |
707 | ||
708 | reply = genlmsg_put_reply(msg, info, &mptcp_genl_family, 0, | |
709 | info->genlhdr->cmd); | |
710 | if (!reply) { | |
711 | GENL_SET_ERR_MSG(info, "not enough space in Netlink message"); | |
712 | ret = -EMSGSIZE; | |
713 | goto fail; | |
714 | } | |
715 | ||
716 | lock_sock(sk); | |
717 | spin_lock_bh(&msk->pm.lock); | |
718 | entry = mptcp_userspace_pm_lookup_addr_by_id(msk, addr.addr.id); | |
719 | if (!entry) { | |
720 | GENL_SET_ERR_MSG(info, "address not found"); | |
721 | ret = -EINVAL; | |
722 | goto unlock_fail; | |
723 | } | |
724 | ||
725 | ret = mptcp_nl_fill_addr(msg, entry); | |
726 | if (ret) | |
727 | goto unlock_fail; | |
728 | ||
729 | genlmsg_end(msg, reply); | |
730 | ret = genlmsg_reply(msg, info); | |
731 | spin_unlock_bh(&msk->pm.lock); | |
732 | release_sock(sk); | |
733 | sock_put(sk); | |
734 | return ret; | |
735 | ||
736 | unlock_fail: | |
737 | spin_unlock_bh(&msk->pm.lock); | |
738 | release_sock(sk); | |
739 | fail: | |
740 | nlmsg_free(msg); | |
741 | out: | |
742 | sock_put(sk); | |
743 | return ret; | |
744 | } |