Commit | Line | Data |
---|---|---|
309795f4 JC |
1 | /* |
2 | * L2TP netlink layer, for management | |
3 | * | |
4 | * Copyright (c) 2008,2009,2010 Katalix Systems Ltd | |
5 | * | |
6 | * Partly based on the IrDA nelink implementation | |
7 | * (see net/irda/irnetlink.c) which is: | |
8 | * Copyright (c) 2007 Samuel Ortiz <samuel@sortiz.org> | |
9 | * which is in turn partly based on the wireless netlink code: | |
10 | * Copyright 2006 Johannes Berg <johannes@sipsolutions.net> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | */ | |
16 | ||
a4ca44fa JP |
17 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
18 | ||
309795f4 JC |
19 | #include <net/sock.h> |
20 | #include <net/genetlink.h> | |
21 | #include <net/udp.h> | |
22 | #include <linux/in.h> | |
23 | #include <linux/udp.h> | |
24 | #include <linux/socket.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/list.h> | |
27 | #include <net/net_namespace.h> | |
28 | ||
29 | #include <linux/l2tp.h> | |
30 | ||
31 | #include "l2tp_core.h" | |
32 | ||
33 | ||
489111e5 | 34 | static struct genl_family l2tp_nl_family; |
309795f4 | 35 | |
33f72e6f BH |
36 | static const struct genl_multicast_group l2tp_multicast_group[] = { |
37 | { | |
38 | .name = L2TP_GENL_MCGROUP, | |
39 | }, | |
40 | }; | |
41 | ||
42 | static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 portid, u32 seq, | |
43 | int flags, struct l2tp_tunnel *tunnel, u8 cmd); | |
44 | static int l2tp_nl_session_send(struct sk_buff *skb, u32 portid, u32 seq, | |
45 | int flags, struct l2tp_session *session, | |
46 | u8 cmd); | |
47 | ||
309795f4 JC |
48 | /* Accessed under genl lock */ |
49 | static const struct l2tp_nl_cmd_ops *l2tp_nl_cmd_ops[__L2TP_PWTYPE_MAX]; | |
50 | ||
2777e2ab GN |
51 | static struct l2tp_session *l2tp_nl_session_get(struct genl_info *info, |
52 | bool do_ref) | |
309795f4 JC |
53 | { |
54 | u32 tunnel_id; | |
55 | u32 session_id; | |
56 | char *ifname; | |
57 | struct l2tp_tunnel *tunnel; | |
58 | struct l2tp_session *session = NULL; | |
59 | struct net *net = genl_info_net(info); | |
60 | ||
61 | if (info->attrs[L2TP_ATTR_IFNAME]) { | |
62 | ifname = nla_data(info->attrs[L2TP_ATTR_IFNAME]); | |
2777e2ab | 63 | session = l2tp_session_get_by_ifname(net, ifname, do_ref); |
309795f4 JC |
64 | } else if ((info->attrs[L2TP_ATTR_SESSION_ID]) && |
65 | (info->attrs[L2TP_ATTR_CONN_ID])) { | |
66 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
67 | session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]); | |
68 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
69 | if (tunnel) | |
2777e2ab GN |
70 | session = l2tp_session_get(net, tunnel, session_id, |
71 | do_ref); | |
309795f4 JC |
72 | } |
73 | ||
74 | return session; | |
75 | } | |
76 | ||
77 | static int l2tp_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info) | |
78 | { | |
79 | struct sk_buff *msg; | |
80 | void *hdr; | |
81 | int ret = -ENOBUFS; | |
82 | ||
58050fce | 83 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
309795f4 JC |
84 | if (!msg) { |
85 | ret = -ENOMEM; | |
86 | goto out; | |
87 | } | |
88 | ||
15e47304 | 89 | hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, |
309795f4 | 90 | &l2tp_nl_family, 0, L2TP_CMD_NOOP); |
7f8436a1 WY |
91 | if (!hdr) { |
92 | ret = -EMSGSIZE; | |
309795f4 JC |
93 | goto err_out; |
94 | } | |
95 | ||
96 | genlmsg_end(msg, hdr); | |
97 | ||
15e47304 | 98 | return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid); |
309795f4 JC |
99 | |
100 | err_out: | |
101 | nlmsg_free(msg); | |
102 | ||
103 | out: | |
104 | return ret; | |
105 | } | |
106 | ||
33f72e6f BH |
107 | static int l2tp_tunnel_notify(struct genl_family *family, |
108 | struct genl_info *info, | |
109 | struct l2tp_tunnel *tunnel, | |
110 | u8 cmd) | |
111 | { | |
112 | struct sk_buff *msg; | |
113 | int ret; | |
114 | ||
115 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
116 | if (!msg) | |
117 | return -ENOMEM; | |
118 | ||
119 | ret = l2tp_nl_tunnel_send(msg, info->snd_portid, info->snd_seq, | |
120 | NLM_F_ACK, tunnel, cmd); | |
121 | ||
853effc5 MT |
122 | if (ret >= 0) { |
123 | ret = genlmsg_multicast_allns(family, msg, 0, 0, GFP_ATOMIC); | |
124 | /* We don't care if no one is listening */ | |
125 | if (ret == -ESRCH) | |
126 | ret = 0; | |
127 | return ret; | |
128 | } | |
33f72e6f BH |
129 | |
130 | nlmsg_free(msg); | |
131 | ||
132 | return ret; | |
133 | } | |
134 | ||
135 | static int l2tp_session_notify(struct genl_family *family, | |
136 | struct genl_info *info, | |
137 | struct l2tp_session *session, | |
138 | u8 cmd) | |
139 | { | |
140 | struct sk_buff *msg; | |
141 | int ret; | |
142 | ||
143 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
144 | if (!msg) | |
145 | return -ENOMEM; | |
146 | ||
147 | ret = l2tp_nl_session_send(msg, info->snd_portid, info->snd_seq, | |
148 | NLM_F_ACK, session, cmd); | |
149 | ||
853effc5 MT |
150 | if (ret >= 0) { |
151 | ret = genlmsg_multicast_allns(family, msg, 0, 0, GFP_ATOMIC); | |
152 | /* We don't care if no one is listening */ | |
153 | if (ret == -ESRCH) | |
154 | ret = 0; | |
155 | return ret; | |
156 | } | |
33f72e6f BH |
157 | |
158 | nlmsg_free(msg); | |
159 | ||
160 | return ret; | |
161 | } | |
162 | ||
309795f4 JC |
163 | static int l2tp_nl_cmd_tunnel_create(struct sk_buff *skb, struct genl_info *info) |
164 | { | |
165 | u32 tunnel_id; | |
166 | u32 peer_tunnel_id; | |
167 | int proto_version; | |
168 | int fd; | |
169 | int ret = 0; | |
170 | struct l2tp_tunnel_cfg cfg = { 0, }; | |
171 | struct l2tp_tunnel *tunnel; | |
172 | struct net *net = genl_info_net(info); | |
173 | ||
174 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
175 | ret = -EINVAL; | |
176 | goto out; | |
177 | } | |
178 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
179 | ||
180 | if (!info->attrs[L2TP_ATTR_PEER_CONN_ID]) { | |
181 | ret = -EINVAL; | |
182 | goto out; | |
183 | } | |
184 | peer_tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_CONN_ID]); | |
185 | ||
186 | if (!info->attrs[L2TP_ATTR_PROTO_VERSION]) { | |
187 | ret = -EINVAL; | |
188 | goto out; | |
189 | } | |
190 | proto_version = nla_get_u8(info->attrs[L2TP_ATTR_PROTO_VERSION]); | |
191 | ||
192 | if (!info->attrs[L2TP_ATTR_ENCAP_TYPE]) { | |
193 | ret = -EINVAL; | |
194 | goto out; | |
195 | } | |
196 | cfg.encap = nla_get_u16(info->attrs[L2TP_ATTR_ENCAP_TYPE]); | |
197 | ||
789a4a2c JC |
198 | fd = -1; |
199 | if (info->attrs[L2TP_ATTR_FD]) { | |
200 | fd = nla_get_u32(info->attrs[L2TP_ATTR_FD]); | |
201 | } else { | |
f9bac8df CE |
202 | #if IS_ENABLED(CONFIG_IPV6) |
203 | if (info->attrs[L2TP_ATTR_IP6_SADDR] && | |
204 | info->attrs[L2TP_ATTR_IP6_DADDR]) { | |
205 | cfg.local_ip6 = nla_data( | |
206 | info->attrs[L2TP_ATTR_IP6_SADDR]); | |
207 | cfg.peer_ip6 = nla_data( | |
208 | info->attrs[L2TP_ATTR_IP6_DADDR]); | |
209 | } else | |
210 | #endif | |
211 | if (info->attrs[L2TP_ATTR_IP_SADDR] && | |
212 | info->attrs[L2TP_ATTR_IP_DADDR]) { | |
67b61f6c | 213 | cfg.local_ip.s_addr = nla_get_in_addr( |
f9bac8df | 214 | info->attrs[L2TP_ATTR_IP_SADDR]); |
67b61f6c | 215 | cfg.peer_ip.s_addr = nla_get_in_addr( |
f9bac8df CE |
216 | info->attrs[L2TP_ATTR_IP_DADDR]); |
217 | } else { | |
218 | ret = -EINVAL; | |
219 | goto out; | |
220 | } | |
789a4a2c JC |
221 | if (info->attrs[L2TP_ATTR_UDP_SPORT]) |
222 | cfg.local_udp_port = nla_get_u16(info->attrs[L2TP_ATTR_UDP_SPORT]); | |
223 | if (info->attrs[L2TP_ATTR_UDP_DPORT]) | |
224 | cfg.peer_udp_port = nla_get_u16(info->attrs[L2TP_ATTR_UDP_DPORT]); | |
57ceb861 AST |
225 | cfg.use_udp_checksums = nla_get_flag( |
226 | info->attrs[L2TP_ATTR_UDP_CSUM]); | |
6b649fea TH |
227 | |
228 | #if IS_ENABLED(CONFIG_IPV6) | |
57ceb861 AST |
229 | cfg.udp6_zero_tx_checksums = nla_get_flag( |
230 | info->attrs[L2TP_ATTR_UDP_ZERO_CSUM6_TX]); | |
231 | cfg.udp6_zero_rx_checksums = nla_get_flag( | |
232 | info->attrs[L2TP_ATTR_UDP_ZERO_CSUM6_RX]); | |
6b649fea | 233 | #endif |
309795f4 | 234 | } |
309795f4 JC |
235 | |
236 | if (info->attrs[L2TP_ATTR_DEBUG]) | |
237 | cfg.debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); | |
238 | ||
239 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
240 | if (tunnel != NULL) { | |
241 | ret = -EEXIST; | |
242 | goto out; | |
243 | } | |
244 | ||
245 | ret = -EINVAL; | |
246 | switch (cfg.encap) { | |
247 | case L2TP_ENCAPTYPE_UDP: | |
248 | case L2TP_ENCAPTYPE_IP: | |
249 | ret = l2tp_tunnel_create(net, fd, proto_version, tunnel_id, | |
250 | peer_tunnel_id, &cfg, &tunnel); | |
251 | break; | |
252 | } | |
253 | ||
33f72e6f BH |
254 | if (ret >= 0) |
255 | ret = l2tp_tunnel_notify(&l2tp_nl_family, info, | |
256 | tunnel, L2TP_CMD_TUNNEL_CREATE); | |
309795f4 JC |
257 | out: |
258 | return ret; | |
259 | } | |
260 | ||
261 | static int l2tp_nl_cmd_tunnel_delete(struct sk_buff *skb, struct genl_info *info) | |
262 | { | |
263 | struct l2tp_tunnel *tunnel; | |
264 | u32 tunnel_id; | |
265 | int ret = 0; | |
266 | struct net *net = genl_info_net(info); | |
267 | ||
268 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
269 | ret = -EINVAL; | |
270 | goto out; | |
271 | } | |
272 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
273 | ||
274 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
275 | if (tunnel == NULL) { | |
276 | ret = -ENODEV; | |
277 | goto out; | |
278 | } | |
279 | ||
33f72e6f BH |
280 | l2tp_tunnel_notify(&l2tp_nl_family, info, |
281 | tunnel, L2TP_CMD_TUNNEL_DELETE); | |
282 | ||
309795f4 JC |
283 | (void) l2tp_tunnel_delete(tunnel); |
284 | ||
285 | out: | |
286 | return ret; | |
287 | } | |
288 | ||
289 | static int l2tp_nl_cmd_tunnel_modify(struct sk_buff *skb, struct genl_info *info) | |
290 | { | |
291 | struct l2tp_tunnel *tunnel; | |
292 | u32 tunnel_id; | |
293 | int ret = 0; | |
294 | struct net *net = genl_info_net(info); | |
295 | ||
296 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
297 | ret = -EINVAL; | |
298 | goto out; | |
299 | } | |
300 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
301 | ||
302 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
303 | if (tunnel == NULL) { | |
304 | ret = -ENODEV; | |
305 | goto out; | |
306 | } | |
307 | ||
308 | if (info->attrs[L2TP_ATTR_DEBUG]) | |
309 | tunnel->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); | |
310 | ||
33f72e6f BH |
311 | ret = l2tp_tunnel_notify(&l2tp_nl_family, info, |
312 | tunnel, L2TP_CMD_TUNNEL_MODIFY); | |
313 | ||
309795f4 JC |
314 | out: |
315 | return ret; | |
316 | } | |
317 | ||
15e47304 | 318 | static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 portid, u32 seq, int flags, |
33f72e6f | 319 | struct l2tp_tunnel *tunnel, u8 cmd) |
309795f4 JC |
320 | { |
321 | void *hdr; | |
322 | struct nlattr *nest; | |
323 | struct sock *sk = NULL; | |
324 | struct inet_sock *inet; | |
f9bac8df CE |
325 | #if IS_ENABLED(CONFIG_IPV6) |
326 | struct ipv6_pinfo *np = NULL; | |
327 | #endif | |
309795f4 | 328 | |
33f72e6f | 329 | hdr = genlmsg_put(skb, portid, seq, &l2tp_nl_family, flags, cmd); |
7f8436a1 WY |
330 | if (!hdr) |
331 | return -EMSGSIZE; | |
309795f4 | 332 | |
60aed2ab DM |
333 | if (nla_put_u8(skb, L2TP_ATTR_PROTO_VERSION, tunnel->version) || |
334 | nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id) || | |
335 | nla_put_u32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id) || | |
336 | nla_put_u32(skb, L2TP_ATTR_DEBUG, tunnel->debug) || | |
337 | nla_put_u16(skb, L2TP_ATTR_ENCAP_TYPE, tunnel->encap)) | |
338 | goto nla_put_failure; | |
309795f4 JC |
339 | |
340 | nest = nla_nest_start(skb, L2TP_ATTR_STATS); | |
341 | if (nest == NULL) | |
342 | goto nla_put_failure; | |
343 | ||
1c714a92 ND |
344 | if (nla_put_u64_64bit(skb, L2TP_ATTR_TX_PACKETS, |
345 | atomic_long_read(&tunnel->stats.tx_packets), | |
346 | L2TP_ATTR_STATS_PAD) || | |
347 | nla_put_u64_64bit(skb, L2TP_ATTR_TX_BYTES, | |
348 | atomic_long_read(&tunnel->stats.tx_bytes), | |
349 | L2TP_ATTR_STATS_PAD) || | |
350 | nla_put_u64_64bit(skb, L2TP_ATTR_TX_ERRORS, | |
351 | atomic_long_read(&tunnel->stats.tx_errors), | |
352 | L2TP_ATTR_STATS_PAD) || | |
353 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_PACKETS, | |
354 | atomic_long_read(&tunnel->stats.rx_packets), | |
355 | L2TP_ATTR_STATS_PAD) || | |
356 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_BYTES, | |
357 | atomic_long_read(&tunnel->stats.rx_bytes), | |
358 | L2TP_ATTR_STATS_PAD) || | |
359 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_SEQ_DISCARDS, | |
360 | atomic_long_read(&tunnel->stats.rx_seq_discards), | |
361 | L2TP_ATTR_STATS_PAD) || | |
362 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_OOS_PACKETS, | |
363 | atomic_long_read(&tunnel->stats.rx_oos_packets), | |
364 | L2TP_ATTR_STATS_PAD) || | |
365 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_ERRORS, | |
366 | atomic_long_read(&tunnel->stats.rx_errors), | |
367 | L2TP_ATTR_STATS_PAD)) | |
60aed2ab | 368 | goto nla_put_failure; |
309795f4 JC |
369 | nla_nest_end(skb, nest); |
370 | ||
371 | sk = tunnel->sock; | |
372 | if (!sk) | |
373 | goto out; | |
374 | ||
f9bac8df CE |
375 | #if IS_ENABLED(CONFIG_IPV6) |
376 | if (sk->sk_family == AF_INET6) | |
377 | np = inet6_sk(sk); | |
378 | #endif | |
379 | ||
309795f4 JC |
380 | inet = inet_sk(sk); |
381 | ||
382 | switch (tunnel->encap) { | |
383 | case L2TP_ENCAPTYPE_UDP: | |
7ff516ff AST |
384 | switch (sk->sk_family) { |
385 | case AF_INET: | |
386 | if (nla_put_u8(skb, L2TP_ATTR_UDP_CSUM, !sk->sk_no_check_tx)) | |
387 | goto nla_put_failure; | |
388 | break; | |
97b7af09 AST |
389 | #if IS_ENABLED(CONFIG_IPV6) |
390 | case AF_INET6: | |
391 | if (udp_get_no_check6_tx(sk) && | |
392 | nla_put_flag(skb, L2TP_ATTR_UDP_ZERO_CSUM6_TX)) | |
393 | goto nla_put_failure; | |
394 | if (udp_get_no_check6_rx(sk) && | |
395 | nla_put_flag(skb, L2TP_ATTR_UDP_ZERO_CSUM6_RX)) | |
396 | goto nla_put_failure; | |
397 | break; | |
398 | #endif | |
7ff516ff | 399 | } |
60aed2ab | 400 | if (nla_put_u16(skb, L2TP_ATTR_UDP_SPORT, ntohs(inet->inet_sport)) || |
7ff516ff | 401 | nla_put_u16(skb, L2TP_ATTR_UDP_DPORT, ntohs(inet->inet_dport))) |
60aed2ab | 402 | goto nla_put_failure; |
309795f4 JC |
403 | /* NOBREAK */ |
404 | case L2TP_ENCAPTYPE_IP: | |
f9bac8df CE |
405 | #if IS_ENABLED(CONFIG_IPV6) |
406 | if (np) { | |
930345ea JB |
407 | if (nla_put_in6_addr(skb, L2TP_ATTR_IP6_SADDR, |
408 | &np->saddr) || | |
409 | nla_put_in6_addr(skb, L2TP_ATTR_IP6_DADDR, | |
410 | &sk->sk_v6_daddr)) | |
f9bac8df CE |
411 | goto nla_put_failure; |
412 | } else | |
413 | #endif | |
930345ea JB |
414 | if (nla_put_in_addr(skb, L2TP_ATTR_IP_SADDR, |
415 | inet->inet_saddr) || | |
416 | nla_put_in_addr(skb, L2TP_ATTR_IP_DADDR, | |
417 | inet->inet_daddr)) | |
60aed2ab | 418 | goto nla_put_failure; |
309795f4 JC |
419 | break; |
420 | } | |
421 | ||
422 | out: | |
053c095a JB |
423 | genlmsg_end(skb, hdr); |
424 | return 0; | |
309795f4 JC |
425 | |
426 | nla_put_failure: | |
427 | genlmsg_cancel(skb, hdr); | |
428 | return -1; | |
429 | } | |
430 | ||
431 | static int l2tp_nl_cmd_tunnel_get(struct sk_buff *skb, struct genl_info *info) | |
432 | { | |
433 | struct l2tp_tunnel *tunnel; | |
434 | struct sk_buff *msg; | |
435 | u32 tunnel_id; | |
436 | int ret = -ENOBUFS; | |
437 | struct net *net = genl_info_net(info); | |
438 | ||
439 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
440 | ret = -EINVAL; | |
441 | goto out; | |
442 | } | |
443 | ||
444 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
445 | ||
446 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
447 | if (tunnel == NULL) { | |
448 | ret = -ENODEV; | |
449 | goto out; | |
450 | } | |
451 | ||
58050fce | 452 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
309795f4 JC |
453 | if (!msg) { |
454 | ret = -ENOMEM; | |
455 | goto out; | |
456 | } | |
457 | ||
15e47304 | 458 | ret = l2tp_nl_tunnel_send(msg, info->snd_portid, info->snd_seq, |
33f72e6f | 459 | NLM_F_ACK, tunnel, L2TP_CMD_TUNNEL_GET); |
309795f4 JC |
460 | if (ret < 0) |
461 | goto err_out; | |
462 | ||
15e47304 | 463 | return genlmsg_unicast(net, msg, info->snd_portid); |
309795f4 JC |
464 | |
465 | err_out: | |
466 | nlmsg_free(msg); | |
467 | ||
468 | out: | |
469 | return ret; | |
470 | } | |
471 | ||
472 | static int l2tp_nl_cmd_tunnel_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
473 | { | |
474 | int ti = cb->args[0]; | |
475 | struct l2tp_tunnel *tunnel; | |
476 | struct net *net = sock_net(skb->sk); | |
477 | ||
478 | for (;;) { | |
479 | tunnel = l2tp_tunnel_find_nth(net, ti); | |
480 | if (tunnel == NULL) | |
481 | goto out; | |
482 | ||
15e47304 | 483 | if (l2tp_nl_tunnel_send(skb, NETLINK_CB(cb->skb).portid, |
309795f4 | 484 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
053c095a | 485 | tunnel, L2TP_CMD_TUNNEL_GET) < 0) |
309795f4 JC |
486 | goto out; |
487 | ||
488 | ti++; | |
489 | } | |
490 | ||
491 | out: | |
492 | cb->args[0] = ti; | |
493 | ||
494 | return skb->len; | |
495 | } | |
496 | ||
497 | static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *info) | |
498 | { | |
499 | u32 tunnel_id = 0; | |
500 | u32 session_id; | |
501 | u32 peer_session_id; | |
502 | int ret = 0; | |
503 | struct l2tp_tunnel *tunnel; | |
504 | struct l2tp_session *session; | |
505 | struct l2tp_session_cfg cfg = { 0, }; | |
506 | struct net *net = genl_info_net(info); | |
507 | ||
508 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
509 | ret = -EINVAL; | |
510 | goto out; | |
511 | } | |
512 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
513 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
514 | if (!tunnel) { | |
515 | ret = -ENODEV; | |
516 | goto out; | |
517 | } | |
518 | ||
519 | if (!info->attrs[L2TP_ATTR_SESSION_ID]) { | |
520 | ret = -EINVAL; | |
521 | goto out; | |
522 | } | |
523 | session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]); | |
309795f4 JC |
524 | |
525 | if (!info->attrs[L2TP_ATTR_PEER_SESSION_ID]) { | |
526 | ret = -EINVAL; | |
527 | goto out; | |
528 | } | |
529 | peer_session_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_SESSION_ID]); | |
530 | ||
531 | if (!info->attrs[L2TP_ATTR_PW_TYPE]) { | |
532 | ret = -EINVAL; | |
533 | goto out; | |
534 | } | |
535 | cfg.pw_type = nla_get_u16(info->attrs[L2TP_ATTR_PW_TYPE]); | |
536 | if (cfg.pw_type >= __L2TP_PWTYPE_MAX) { | |
537 | ret = -EINVAL; | |
538 | goto out; | |
539 | } | |
540 | ||
541 | if (tunnel->version > 2) { | |
542 | if (info->attrs[L2TP_ATTR_OFFSET]) | |
543 | cfg.offset = nla_get_u16(info->attrs[L2TP_ATTR_OFFSET]); | |
544 | ||
545 | if (info->attrs[L2TP_ATTR_DATA_SEQ]) | |
546 | cfg.data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]); | |
547 | ||
548 | cfg.l2specific_type = L2TP_L2SPECTYPE_DEFAULT; | |
549 | if (info->attrs[L2TP_ATTR_L2SPEC_TYPE]) | |
550 | cfg.l2specific_type = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_TYPE]); | |
551 | ||
552 | cfg.l2specific_len = 4; | |
553 | if (info->attrs[L2TP_ATTR_L2SPEC_LEN]) | |
554 | cfg.l2specific_len = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_LEN]); | |
555 | ||
556 | if (info->attrs[L2TP_ATTR_COOKIE]) { | |
557 | u16 len = nla_len(info->attrs[L2TP_ATTR_COOKIE]); | |
558 | if (len > 8) { | |
559 | ret = -EINVAL; | |
560 | goto out; | |
561 | } | |
562 | cfg.cookie_len = len; | |
563 | memcpy(&cfg.cookie[0], nla_data(info->attrs[L2TP_ATTR_COOKIE]), len); | |
564 | } | |
565 | if (info->attrs[L2TP_ATTR_PEER_COOKIE]) { | |
566 | u16 len = nla_len(info->attrs[L2TP_ATTR_PEER_COOKIE]); | |
567 | if (len > 8) { | |
568 | ret = -EINVAL; | |
569 | goto out; | |
570 | } | |
571 | cfg.peer_cookie_len = len; | |
572 | memcpy(&cfg.peer_cookie[0], nla_data(info->attrs[L2TP_ATTR_PEER_COOKIE]), len); | |
573 | } | |
574 | if (info->attrs[L2TP_ATTR_IFNAME]) | |
575 | cfg.ifname = nla_data(info->attrs[L2TP_ATTR_IFNAME]); | |
576 | ||
577 | if (info->attrs[L2TP_ATTR_VLAN_ID]) | |
578 | cfg.vlan_id = nla_get_u16(info->attrs[L2TP_ATTR_VLAN_ID]); | |
579 | } | |
580 | ||
581 | if (info->attrs[L2TP_ATTR_DEBUG]) | |
582 | cfg.debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); | |
583 | ||
584 | if (info->attrs[L2TP_ATTR_RECV_SEQ]) | |
585 | cfg.recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]); | |
586 | ||
587 | if (info->attrs[L2TP_ATTR_SEND_SEQ]) | |
588 | cfg.send_seq = nla_get_u8(info->attrs[L2TP_ATTR_SEND_SEQ]); | |
589 | ||
590 | if (info->attrs[L2TP_ATTR_LNS_MODE]) | |
591 | cfg.lns_mode = nla_get_u8(info->attrs[L2TP_ATTR_LNS_MODE]); | |
592 | ||
593 | if (info->attrs[L2TP_ATTR_RECV_TIMEOUT]) | |
594 | cfg.reorder_timeout = nla_get_msecs(info->attrs[L2TP_ATTR_RECV_TIMEOUT]); | |
595 | ||
596 | if (info->attrs[L2TP_ATTR_MTU]) | |
597 | cfg.mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]); | |
598 | ||
599 | if (info->attrs[L2TP_ATTR_MRU]) | |
600 | cfg.mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]); | |
601 | ||
f1f39f91 | 602 | #ifdef CONFIG_MODULES |
603 | if (l2tp_nl_cmd_ops[cfg.pw_type] == NULL) { | |
604 | genl_unlock(); | |
605 | request_module("net-l2tp-type-%u", cfg.pw_type); | |
606 | genl_lock(); | |
607 | } | |
608 | #endif | |
309795f4 JC |
609 | if ((l2tp_nl_cmd_ops[cfg.pw_type] == NULL) || |
610 | (l2tp_nl_cmd_ops[cfg.pw_type]->session_create == NULL)) { | |
611 | ret = -EPROTONOSUPPORT; | |
612 | goto out; | |
613 | } | |
614 | ||
615 | /* Check that pseudowire-specific params are present */ | |
616 | switch (cfg.pw_type) { | |
617 | case L2TP_PWTYPE_NONE: | |
618 | break; | |
619 | case L2TP_PWTYPE_ETH_VLAN: | |
620 | if (!info->attrs[L2TP_ATTR_VLAN_ID]) { | |
621 | ret = -EINVAL; | |
622 | goto out; | |
623 | } | |
624 | break; | |
625 | case L2TP_PWTYPE_ETH: | |
626 | break; | |
627 | case L2TP_PWTYPE_PPP: | |
628 | case L2TP_PWTYPE_PPP_AC: | |
629 | break; | |
630 | case L2TP_PWTYPE_IP: | |
631 | default: | |
632 | ret = -EPROTONOSUPPORT; | |
633 | break; | |
634 | } | |
635 | ||
636 | ret = -EPROTONOSUPPORT; | |
637 | if (l2tp_nl_cmd_ops[cfg.pw_type]->session_create) | |
638 | ret = (*l2tp_nl_cmd_ops[cfg.pw_type]->session_create)(net, tunnel_id, | |
639 | session_id, peer_session_id, &cfg); | |
640 | ||
33f72e6f | 641 | if (ret >= 0) { |
5e6a9e5a GN |
642 | session = l2tp_session_get(net, tunnel, session_id, false); |
643 | if (session) { | |
33f72e6f BH |
644 | ret = l2tp_session_notify(&l2tp_nl_family, info, session, |
645 | L2TP_CMD_SESSION_CREATE); | |
5e6a9e5a GN |
646 | l2tp_session_dec_refcount(session); |
647 | } | |
33f72e6f BH |
648 | } |
649 | ||
309795f4 JC |
650 | out: |
651 | return ret; | |
652 | } | |
653 | ||
654 | static int l2tp_nl_cmd_session_delete(struct sk_buff *skb, struct genl_info *info) | |
655 | { | |
656 | int ret = 0; | |
657 | struct l2tp_session *session; | |
658 | u16 pw_type; | |
659 | ||
2777e2ab | 660 | session = l2tp_nl_session_get(info, true); |
309795f4 JC |
661 | if (session == NULL) { |
662 | ret = -ENODEV; | |
663 | goto out; | |
664 | } | |
665 | ||
33f72e6f BH |
666 | l2tp_session_notify(&l2tp_nl_family, info, |
667 | session, L2TP_CMD_SESSION_DELETE); | |
668 | ||
309795f4 JC |
669 | pw_type = session->pwtype; |
670 | if (pw_type < __L2TP_PWTYPE_MAX) | |
671 | if (l2tp_nl_cmd_ops[pw_type] && l2tp_nl_cmd_ops[pw_type]->session_delete) | |
672 | ret = (*l2tp_nl_cmd_ops[pw_type]->session_delete)(session); | |
673 | ||
2777e2ab GN |
674 | if (session->deref) |
675 | session->deref(session); | |
676 | l2tp_session_dec_refcount(session); | |
677 | ||
309795f4 JC |
678 | out: |
679 | return ret; | |
680 | } | |
681 | ||
682 | static int l2tp_nl_cmd_session_modify(struct sk_buff *skb, struct genl_info *info) | |
683 | { | |
684 | int ret = 0; | |
685 | struct l2tp_session *session; | |
686 | ||
2777e2ab | 687 | session = l2tp_nl_session_get(info, false); |
309795f4 JC |
688 | if (session == NULL) { |
689 | ret = -ENODEV; | |
690 | goto out; | |
691 | } | |
692 | ||
693 | if (info->attrs[L2TP_ATTR_DEBUG]) | |
694 | session->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); | |
695 | ||
696 | if (info->attrs[L2TP_ATTR_DATA_SEQ]) | |
697 | session->data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]); | |
698 | ||
699 | if (info->attrs[L2TP_ATTR_RECV_SEQ]) | |
700 | session->recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]); | |
701 | ||
bb5016ea | 702 | if (info->attrs[L2TP_ATTR_SEND_SEQ]) { |
309795f4 | 703 | session->send_seq = nla_get_u8(info->attrs[L2TP_ATTR_SEND_SEQ]); |
bb5016ea GN |
704 | l2tp_session_set_header_len(session, session->tunnel->version); |
705 | } | |
309795f4 JC |
706 | |
707 | if (info->attrs[L2TP_ATTR_LNS_MODE]) | |
708 | session->lns_mode = nla_get_u8(info->attrs[L2TP_ATTR_LNS_MODE]); | |
709 | ||
710 | if (info->attrs[L2TP_ATTR_RECV_TIMEOUT]) | |
711 | session->reorder_timeout = nla_get_msecs(info->attrs[L2TP_ATTR_RECV_TIMEOUT]); | |
712 | ||
713 | if (info->attrs[L2TP_ATTR_MTU]) | |
714 | session->mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]); | |
715 | ||
716 | if (info->attrs[L2TP_ATTR_MRU]) | |
717 | session->mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]); | |
718 | ||
33f72e6f BH |
719 | ret = l2tp_session_notify(&l2tp_nl_family, info, |
720 | session, L2TP_CMD_SESSION_MODIFY); | |
721 | ||
2777e2ab GN |
722 | l2tp_session_dec_refcount(session); |
723 | ||
309795f4 JC |
724 | out: |
725 | return ret; | |
726 | } | |
727 | ||
15e47304 | 728 | static int l2tp_nl_session_send(struct sk_buff *skb, u32 portid, u32 seq, int flags, |
33f72e6f | 729 | struct l2tp_session *session, u8 cmd) |
309795f4 JC |
730 | { |
731 | void *hdr; | |
732 | struct nlattr *nest; | |
733 | struct l2tp_tunnel *tunnel = session->tunnel; | |
734 | struct sock *sk = NULL; | |
735 | ||
736 | sk = tunnel->sock; | |
737 | ||
33f72e6f | 738 | hdr = genlmsg_put(skb, portid, seq, &l2tp_nl_family, flags, cmd); |
7f8436a1 WY |
739 | if (!hdr) |
740 | return -EMSGSIZE; | |
309795f4 | 741 | |
60aed2ab DM |
742 | if (nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id) || |
743 | nla_put_u32(skb, L2TP_ATTR_SESSION_ID, session->session_id) || | |
744 | nla_put_u32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id) || | |
745 | nla_put_u32(skb, L2TP_ATTR_PEER_SESSION_ID, | |
746 | session->peer_session_id) || | |
747 | nla_put_u32(skb, L2TP_ATTR_DEBUG, session->debug) || | |
748 | nla_put_u16(skb, L2TP_ATTR_PW_TYPE, session->pwtype) || | |
749 | nla_put_u16(skb, L2TP_ATTR_MTU, session->mtu) || | |
750 | (session->mru && | |
751 | nla_put_u16(skb, L2TP_ATTR_MRU, session->mru))) | |
752 | goto nla_put_failure; | |
753 | ||
e269ed26 | 754 | if ((session->ifname[0] && |
60aed2ab DM |
755 | nla_put_string(skb, L2TP_ATTR_IFNAME, session->ifname)) || |
756 | (session->cookie_len && | |
757 | nla_put(skb, L2TP_ATTR_COOKIE, session->cookie_len, | |
758 | &session->cookie[0])) || | |
759 | (session->peer_cookie_len && | |
760 | nla_put(skb, L2TP_ATTR_PEER_COOKIE, session->peer_cookie_len, | |
761 | &session->peer_cookie[0])) || | |
762 | nla_put_u8(skb, L2TP_ATTR_RECV_SEQ, session->recv_seq) || | |
763 | nla_put_u8(skb, L2TP_ATTR_SEND_SEQ, session->send_seq) || | |
764 | nla_put_u8(skb, L2TP_ATTR_LNS_MODE, session->lns_mode) || | |
309795f4 | 765 | #ifdef CONFIG_XFRM |
60aed2ab DM |
766 | (((sk) && (sk->sk_policy[0] || sk->sk_policy[1])) && |
767 | nla_put_u8(skb, L2TP_ATTR_USING_IPSEC, 1)) || | |
309795f4 | 768 | #endif |
60aed2ab | 769 | (session->reorder_timeout && |
2175d87c ND |
770 | nla_put_msecs(skb, L2TP_ATTR_RECV_TIMEOUT, |
771 | session->reorder_timeout, L2TP_ATTR_PAD))) | |
60aed2ab | 772 | goto nla_put_failure; |
5de7aee5 | 773 | |
309795f4 JC |
774 | nest = nla_nest_start(skb, L2TP_ATTR_STATS); |
775 | if (nest == NULL) | |
776 | goto nla_put_failure; | |
5de7aee5 | 777 | |
1c714a92 ND |
778 | if (nla_put_u64_64bit(skb, L2TP_ATTR_TX_PACKETS, |
779 | atomic_long_read(&session->stats.tx_packets), | |
780 | L2TP_ATTR_STATS_PAD) || | |
781 | nla_put_u64_64bit(skb, L2TP_ATTR_TX_BYTES, | |
782 | atomic_long_read(&session->stats.tx_bytes), | |
783 | L2TP_ATTR_STATS_PAD) || | |
784 | nla_put_u64_64bit(skb, L2TP_ATTR_TX_ERRORS, | |
785 | atomic_long_read(&session->stats.tx_errors), | |
786 | L2TP_ATTR_STATS_PAD) || | |
787 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_PACKETS, | |
788 | atomic_long_read(&session->stats.rx_packets), | |
789 | L2TP_ATTR_STATS_PAD) || | |
790 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_BYTES, | |
791 | atomic_long_read(&session->stats.rx_bytes), | |
792 | L2TP_ATTR_STATS_PAD) || | |
793 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_SEQ_DISCARDS, | |
794 | atomic_long_read(&session->stats.rx_seq_discards), | |
795 | L2TP_ATTR_STATS_PAD) || | |
796 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_OOS_PACKETS, | |
797 | atomic_long_read(&session->stats.rx_oos_packets), | |
798 | L2TP_ATTR_STATS_PAD) || | |
799 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_ERRORS, | |
800 | atomic_long_read(&session->stats.rx_errors), | |
801 | L2TP_ATTR_STATS_PAD)) | |
60aed2ab | 802 | goto nla_put_failure; |
309795f4 JC |
803 | nla_nest_end(skb, nest); |
804 | ||
053c095a JB |
805 | genlmsg_end(skb, hdr); |
806 | return 0; | |
309795f4 JC |
807 | |
808 | nla_put_failure: | |
809 | genlmsg_cancel(skb, hdr); | |
810 | return -1; | |
811 | } | |
812 | ||
813 | static int l2tp_nl_cmd_session_get(struct sk_buff *skb, struct genl_info *info) | |
814 | { | |
815 | struct l2tp_session *session; | |
816 | struct sk_buff *msg; | |
817 | int ret; | |
818 | ||
2777e2ab | 819 | session = l2tp_nl_session_get(info, false); |
309795f4 JC |
820 | if (session == NULL) { |
821 | ret = -ENODEV; | |
2777e2ab | 822 | goto err; |
309795f4 JC |
823 | } |
824 | ||
58050fce | 825 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
309795f4 JC |
826 | if (!msg) { |
827 | ret = -ENOMEM; | |
2777e2ab | 828 | goto err_ref; |
309795f4 JC |
829 | } |
830 | ||
15e47304 | 831 | ret = l2tp_nl_session_send(msg, info->snd_portid, info->snd_seq, |
33f72e6f | 832 | 0, session, L2TP_CMD_SESSION_GET); |
309795f4 | 833 | if (ret < 0) |
2777e2ab | 834 | goto err_ref_msg; |
309795f4 | 835 | |
2777e2ab | 836 | ret = genlmsg_unicast(genl_info_net(info), msg, info->snd_portid); |
309795f4 | 837 | |
2777e2ab | 838 | l2tp_session_dec_refcount(session); |
309795f4 | 839 | |
2777e2ab GN |
840 | return ret; |
841 | ||
842 | err_ref_msg: | |
843 | nlmsg_free(msg); | |
844 | err_ref: | |
845 | l2tp_session_dec_refcount(session); | |
846 | err: | |
309795f4 JC |
847 | return ret; |
848 | } | |
849 | ||
850 | static int l2tp_nl_cmd_session_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
851 | { | |
852 | struct net *net = sock_net(skb->sk); | |
853 | struct l2tp_session *session; | |
854 | struct l2tp_tunnel *tunnel = NULL; | |
855 | int ti = cb->args[0]; | |
856 | int si = cb->args[1]; | |
857 | ||
858 | for (;;) { | |
859 | if (tunnel == NULL) { | |
860 | tunnel = l2tp_tunnel_find_nth(net, ti); | |
861 | if (tunnel == NULL) | |
862 | goto out; | |
863 | } | |
864 | ||
e08293a4 | 865 | session = l2tp_session_get_nth(tunnel, si, false); |
309795f4 JC |
866 | if (session == NULL) { |
867 | ti++; | |
868 | tunnel = NULL; | |
869 | si = 0; | |
870 | continue; | |
871 | } | |
872 | ||
15e47304 | 873 | if (l2tp_nl_session_send(skb, NETLINK_CB(cb->skb).portid, |
309795f4 | 874 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
e08293a4 GN |
875 | session, L2TP_CMD_SESSION_GET) < 0) { |
876 | l2tp_session_dec_refcount(session); | |
309795f4 | 877 | break; |
e08293a4 GN |
878 | } |
879 | l2tp_session_dec_refcount(session); | |
309795f4 JC |
880 | |
881 | si++; | |
882 | } | |
883 | ||
884 | out: | |
885 | cb->args[0] = ti; | |
886 | cb->args[1] = si; | |
887 | ||
888 | return skb->len; | |
889 | } | |
890 | ||
f5bb341e | 891 | static const struct nla_policy l2tp_nl_policy[L2TP_ATTR_MAX + 1] = { |
309795f4 JC |
892 | [L2TP_ATTR_NONE] = { .type = NLA_UNSPEC, }, |
893 | [L2TP_ATTR_PW_TYPE] = { .type = NLA_U16, }, | |
894 | [L2TP_ATTR_ENCAP_TYPE] = { .type = NLA_U16, }, | |
895 | [L2TP_ATTR_OFFSET] = { .type = NLA_U16, }, | |
896 | [L2TP_ATTR_DATA_SEQ] = { .type = NLA_U8, }, | |
897 | [L2TP_ATTR_L2SPEC_TYPE] = { .type = NLA_U8, }, | |
898 | [L2TP_ATTR_L2SPEC_LEN] = { .type = NLA_U8, }, | |
899 | [L2TP_ATTR_PROTO_VERSION] = { .type = NLA_U8, }, | |
900 | [L2TP_ATTR_CONN_ID] = { .type = NLA_U32, }, | |
901 | [L2TP_ATTR_PEER_CONN_ID] = { .type = NLA_U32, }, | |
902 | [L2TP_ATTR_SESSION_ID] = { .type = NLA_U32, }, | |
903 | [L2TP_ATTR_PEER_SESSION_ID] = { .type = NLA_U32, }, | |
904 | [L2TP_ATTR_UDP_CSUM] = { .type = NLA_U8, }, | |
905 | [L2TP_ATTR_VLAN_ID] = { .type = NLA_U16, }, | |
906 | [L2TP_ATTR_DEBUG] = { .type = NLA_U32, }, | |
907 | [L2TP_ATTR_RECV_SEQ] = { .type = NLA_U8, }, | |
908 | [L2TP_ATTR_SEND_SEQ] = { .type = NLA_U8, }, | |
909 | [L2TP_ATTR_LNS_MODE] = { .type = NLA_U8, }, | |
910 | [L2TP_ATTR_USING_IPSEC] = { .type = NLA_U8, }, | |
911 | [L2TP_ATTR_RECV_TIMEOUT] = { .type = NLA_MSECS, }, | |
912 | [L2TP_ATTR_FD] = { .type = NLA_U32, }, | |
913 | [L2TP_ATTR_IP_SADDR] = { .type = NLA_U32, }, | |
914 | [L2TP_ATTR_IP_DADDR] = { .type = NLA_U32, }, | |
915 | [L2TP_ATTR_UDP_SPORT] = { .type = NLA_U16, }, | |
916 | [L2TP_ATTR_UDP_DPORT] = { .type = NLA_U16, }, | |
917 | [L2TP_ATTR_MTU] = { .type = NLA_U16, }, | |
918 | [L2TP_ATTR_MRU] = { .type = NLA_U16, }, | |
919 | [L2TP_ATTR_STATS] = { .type = NLA_NESTED, }, | |
f9bac8df CE |
920 | [L2TP_ATTR_IP6_SADDR] = { |
921 | .type = NLA_BINARY, | |
922 | .len = sizeof(struct in6_addr), | |
923 | }, | |
924 | [L2TP_ATTR_IP6_DADDR] = { | |
925 | .type = NLA_BINARY, | |
926 | .len = sizeof(struct in6_addr), | |
927 | }, | |
309795f4 JC |
928 | [L2TP_ATTR_IFNAME] = { |
929 | .type = NLA_NUL_STRING, | |
930 | .len = IFNAMSIZ - 1, | |
931 | }, | |
932 | [L2TP_ATTR_COOKIE] = { | |
933 | .type = NLA_BINARY, | |
934 | .len = 8, | |
935 | }, | |
936 | [L2TP_ATTR_PEER_COOKIE] = { | |
937 | .type = NLA_BINARY, | |
938 | .len = 8, | |
939 | }, | |
940 | }; | |
941 | ||
4534de83 | 942 | static const struct genl_ops l2tp_nl_ops[] = { |
309795f4 JC |
943 | { |
944 | .cmd = L2TP_CMD_NOOP, | |
945 | .doit = l2tp_nl_cmd_noop, | |
946 | .policy = l2tp_nl_policy, | |
947 | /* can be retrieved by unprivileged users */ | |
948 | }, | |
949 | { | |
950 | .cmd = L2TP_CMD_TUNNEL_CREATE, | |
951 | .doit = l2tp_nl_cmd_tunnel_create, | |
952 | .policy = l2tp_nl_policy, | |
953 | .flags = GENL_ADMIN_PERM, | |
954 | }, | |
955 | { | |
956 | .cmd = L2TP_CMD_TUNNEL_DELETE, | |
957 | .doit = l2tp_nl_cmd_tunnel_delete, | |
958 | .policy = l2tp_nl_policy, | |
959 | .flags = GENL_ADMIN_PERM, | |
960 | }, | |
961 | { | |
962 | .cmd = L2TP_CMD_TUNNEL_MODIFY, | |
963 | .doit = l2tp_nl_cmd_tunnel_modify, | |
964 | .policy = l2tp_nl_policy, | |
965 | .flags = GENL_ADMIN_PERM, | |
966 | }, | |
967 | { | |
968 | .cmd = L2TP_CMD_TUNNEL_GET, | |
969 | .doit = l2tp_nl_cmd_tunnel_get, | |
970 | .dumpit = l2tp_nl_cmd_tunnel_dump, | |
971 | .policy = l2tp_nl_policy, | |
972 | .flags = GENL_ADMIN_PERM, | |
973 | }, | |
974 | { | |
975 | .cmd = L2TP_CMD_SESSION_CREATE, | |
976 | .doit = l2tp_nl_cmd_session_create, | |
977 | .policy = l2tp_nl_policy, | |
978 | .flags = GENL_ADMIN_PERM, | |
979 | }, | |
980 | { | |
981 | .cmd = L2TP_CMD_SESSION_DELETE, | |
982 | .doit = l2tp_nl_cmd_session_delete, | |
983 | .policy = l2tp_nl_policy, | |
984 | .flags = GENL_ADMIN_PERM, | |
985 | }, | |
986 | { | |
987 | .cmd = L2TP_CMD_SESSION_MODIFY, | |
988 | .doit = l2tp_nl_cmd_session_modify, | |
989 | .policy = l2tp_nl_policy, | |
990 | .flags = GENL_ADMIN_PERM, | |
991 | }, | |
992 | { | |
993 | .cmd = L2TP_CMD_SESSION_GET, | |
994 | .doit = l2tp_nl_cmd_session_get, | |
995 | .dumpit = l2tp_nl_cmd_session_dump, | |
996 | .policy = l2tp_nl_policy, | |
997 | .flags = GENL_ADMIN_PERM, | |
998 | }, | |
999 | }; | |
1000 | ||
56989f6d | 1001 | static struct genl_family l2tp_nl_family __ro_after_init = { |
489111e5 JB |
1002 | .name = L2TP_GENL_NAME, |
1003 | .version = L2TP_GENL_VERSION, | |
1004 | .hdrsize = 0, | |
1005 | .maxattr = L2TP_ATTR_MAX, | |
1006 | .netnsok = true, | |
1007 | .module = THIS_MODULE, | |
1008 | .ops = l2tp_nl_ops, | |
1009 | .n_ops = ARRAY_SIZE(l2tp_nl_ops), | |
1010 | .mcgrps = l2tp_multicast_group, | |
1011 | .n_mcgrps = ARRAY_SIZE(l2tp_multicast_group), | |
1012 | }; | |
1013 | ||
309795f4 JC |
1014 | int l2tp_nl_register_ops(enum l2tp_pwtype pw_type, const struct l2tp_nl_cmd_ops *ops) |
1015 | { | |
1016 | int ret; | |
1017 | ||
1018 | ret = -EINVAL; | |
1019 | if (pw_type >= __L2TP_PWTYPE_MAX) | |
1020 | goto err; | |
1021 | ||
1022 | genl_lock(); | |
1023 | ret = -EBUSY; | |
1024 | if (l2tp_nl_cmd_ops[pw_type]) | |
1025 | goto out; | |
1026 | ||
1027 | l2tp_nl_cmd_ops[pw_type] = ops; | |
8cb49014 | 1028 | ret = 0; |
309795f4 JC |
1029 | |
1030 | out: | |
1031 | genl_unlock(); | |
1032 | err: | |
8cb49014 | 1033 | return ret; |
309795f4 JC |
1034 | } |
1035 | EXPORT_SYMBOL_GPL(l2tp_nl_register_ops); | |
1036 | ||
1037 | void l2tp_nl_unregister_ops(enum l2tp_pwtype pw_type) | |
1038 | { | |
1039 | if (pw_type < __L2TP_PWTYPE_MAX) { | |
1040 | genl_lock(); | |
1041 | l2tp_nl_cmd_ops[pw_type] = NULL; | |
1042 | genl_unlock(); | |
1043 | } | |
1044 | } | |
1045 | EXPORT_SYMBOL_GPL(l2tp_nl_unregister_ops); | |
1046 | ||
56989f6d | 1047 | static int __init l2tp_nl_init(void) |
309795f4 | 1048 | { |
a4ca44fa | 1049 | pr_info("L2TP netlink interface\n"); |
489111e5 | 1050 | return genl_register_family(&l2tp_nl_family); |
309795f4 JC |
1051 | } |
1052 | ||
1053 | static void l2tp_nl_cleanup(void) | |
1054 | { | |
1055 | genl_unregister_family(&l2tp_nl_family); | |
1056 | } | |
1057 | ||
1058 | module_init(l2tp_nl_init); | |
1059 | module_exit(l2tp_nl_cleanup); | |
1060 | ||
1061 | MODULE_AUTHOR("James Chapman <jchapman@katalix.com>"); | |
1062 | MODULE_DESCRIPTION("L2TP netlink"); | |
1063 | MODULE_LICENSE("GPL"); | |
1064 | MODULE_VERSION("1.0"); | |
e9412c37 | 1065 | MODULE_ALIAS_GENL_FAMILY("l2tp"); |