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 | ||
51 | static struct l2tp_session *l2tp_nl_session_find(struct genl_info *info) | |
52 | { | |
53 | u32 tunnel_id; | |
54 | u32 session_id; | |
55 | char *ifname; | |
56 | struct l2tp_tunnel *tunnel; | |
57 | struct l2tp_session *session = NULL; | |
58 | struct net *net = genl_info_net(info); | |
59 | ||
60 | if (info->attrs[L2TP_ATTR_IFNAME]) { | |
61 | ifname = nla_data(info->attrs[L2TP_ATTR_IFNAME]); | |
62 | session = l2tp_session_find_by_ifname(net, ifname); | |
63 | } else if ((info->attrs[L2TP_ATTR_SESSION_ID]) && | |
64 | (info->attrs[L2TP_ATTR_CONN_ID])) { | |
65 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
66 | session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]); | |
67 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
68 | if (tunnel) | |
69 | session = l2tp_session_find(net, tunnel, session_id); | |
70 | } | |
71 | ||
72 | return session; | |
73 | } | |
74 | ||
75 | static int l2tp_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info) | |
76 | { | |
77 | struct sk_buff *msg; | |
78 | void *hdr; | |
79 | int ret = -ENOBUFS; | |
80 | ||
58050fce | 81 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
309795f4 JC |
82 | if (!msg) { |
83 | ret = -ENOMEM; | |
84 | goto out; | |
85 | } | |
86 | ||
15e47304 | 87 | hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, |
309795f4 | 88 | &l2tp_nl_family, 0, L2TP_CMD_NOOP); |
7f8436a1 WY |
89 | if (!hdr) { |
90 | ret = -EMSGSIZE; | |
309795f4 JC |
91 | goto err_out; |
92 | } | |
93 | ||
94 | genlmsg_end(msg, hdr); | |
95 | ||
15e47304 | 96 | return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid); |
309795f4 JC |
97 | |
98 | err_out: | |
99 | nlmsg_free(msg); | |
100 | ||
101 | out: | |
102 | return ret; | |
103 | } | |
104 | ||
33f72e6f BH |
105 | static int l2tp_tunnel_notify(struct genl_family *family, |
106 | struct genl_info *info, | |
107 | struct l2tp_tunnel *tunnel, | |
108 | u8 cmd) | |
109 | { | |
110 | struct sk_buff *msg; | |
111 | int ret; | |
112 | ||
113 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
114 | if (!msg) | |
115 | return -ENOMEM; | |
116 | ||
117 | ret = l2tp_nl_tunnel_send(msg, info->snd_portid, info->snd_seq, | |
118 | NLM_F_ACK, tunnel, cmd); | |
119 | ||
853effc5 MT |
120 | if (ret >= 0) { |
121 | ret = genlmsg_multicast_allns(family, msg, 0, 0, GFP_ATOMIC); | |
122 | /* We don't care if no one is listening */ | |
123 | if (ret == -ESRCH) | |
124 | ret = 0; | |
125 | return ret; | |
126 | } | |
33f72e6f BH |
127 | |
128 | nlmsg_free(msg); | |
129 | ||
130 | return ret; | |
131 | } | |
132 | ||
133 | static int l2tp_session_notify(struct genl_family *family, | |
134 | struct genl_info *info, | |
135 | struct l2tp_session *session, | |
136 | u8 cmd) | |
137 | { | |
138 | struct sk_buff *msg; | |
139 | int ret; | |
140 | ||
141 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
142 | if (!msg) | |
143 | return -ENOMEM; | |
144 | ||
145 | ret = l2tp_nl_session_send(msg, info->snd_portid, info->snd_seq, | |
146 | NLM_F_ACK, session, cmd); | |
147 | ||
853effc5 MT |
148 | if (ret >= 0) { |
149 | ret = genlmsg_multicast_allns(family, msg, 0, 0, GFP_ATOMIC); | |
150 | /* We don't care if no one is listening */ | |
151 | if (ret == -ESRCH) | |
152 | ret = 0; | |
153 | return ret; | |
154 | } | |
33f72e6f BH |
155 | |
156 | nlmsg_free(msg); | |
157 | ||
158 | return ret; | |
159 | } | |
160 | ||
309795f4 JC |
161 | static int l2tp_nl_cmd_tunnel_create(struct sk_buff *skb, struct genl_info *info) |
162 | { | |
163 | u32 tunnel_id; | |
164 | u32 peer_tunnel_id; | |
165 | int proto_version; | |
166 | int fd; | |
167 | int ret = 0; | |
168 | struct l2tp_tunnel_cfg cfg = { 0, }; | |
169 | struct l2tp_tunnel *tunnel; | |
170 | struct net *net = genl_info_net(info); | |
171 | ||
172 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
173 | ret = -EINVAL; | |
174 | goto out; | |
175 | } | |
176 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
177 | ||
178 | if (!info->attrs[L2TP_ATTR_PEER_CONN_ID]) { | |
179 | ret = -EINVAL; | |
180 | goto out; | |
181 | } | |
182 | peer_tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_CONN_ID]); | |
183 | ||
184 | if (!info->attrs[L2TP_ATTR_PROTO_VERSION]) { | |
185 | ret = -EINVAL; | |
186 | goto out; | |
187 | } | |
188 | proto_version = nla_get_u8(info->attrs[L2TP_ATTR_PROTO_VERSION]); | |
189 | ||
190 | if (!info->attrs[L2TP_ATTR_ENCAP_TYPE]) { | |
191 | ret = -EINVAL; | |
192 | goto out; | |
193 | } | |
194 | cfg.encap = nla_get_u16(info->attrs[L2TP_ATTR_ENCAP_TYPE]); | |
195 | ||
789a4a2c JC |
196 | fd = -1; |
197 | if (info->attrs[L2TP_ATTR_FD]) { | |
198 | fd = nla_get_u32(info->attrs[L2TP_ATTR_FD]); | |
199 | } else { | |
f9bac8df CE |
200 | #if IS_ENABLED(CONFIG_IPV6) |
201 | if (info->attrs[L2TP_ATTR_IP6_SADDR] && | |
202 | info->attrs[L2TP_ATTR_IP6_DADDR]) { | |
203 | cfg.local_ip6 = nla_data( | |
204 | info->attrs[L2TP_ATTR_IP6_SADDR]); | |
205 | cfg.peer_ip6 = nla_data( | |
206 | info->attrs[L2TP_ATTR_IP6_DADDR]); | |
207 | } else | |
208 | #endif | |
209 | if (info->attrs[L2TP_ATTR_IP_SADDR] && | |
210 | info->attrs[L2TP_ATTR_IP_DADDR]) { | |
67b61f6c | 211 | cfg.local_ip.s_addr = nla_get_in_addr( |
f9bac8df | 212 | info->attrs[L2TP_ATTR_IP_SADDR]); |
67b61f6c | 213 | cfg.peer_ip.s_addr = nla_get_in_addr( |
f9bac8df CE |
214 | info->attrs[L2TP_ATTR_IP_DADDR]); |
215 | } else { | |
216 | ret = -EINVAL; | |
217 | goto out; | |
218 | } | |
789a4a2c JC |
219 | if (info->attrs[L2TP_ATTR_UDP_SPORT]) |
220 | cfg.local_udp_port = nla_get_u16(info->attrs[L2TP_ATTR_UDP_SPORT]); | |
221 | if (info->attrs[L2TP_ATTR_UDP_DPORT]) | |
222 | cfg.peer_udp_port = nla_get_u16(info->attrs[L2TP_ATTR_UDP_DPORT]); | |
57ceb861 AST |
223 | cfg.use_udp_checksums = nla_get_flag( |
224 | info->attrs[L2TP_ATTR_UDP_CSUM]); | |
6b649fea TH |
225 | |
226 | #if IS_ENABLED(CONFIG_IPV6) | |
57ceb861 AST |
227 | cfg.udp6_zero_tx_checksums = nla_get_flag( |
228 | info->attrs[L2TP_ATTR_UDP_ZERO_CSUM6_TX]); | |
229 | cfg.udp6_zero_rx_checksums = nla_get_flag( | |
230 | info->attrs[L2TP_ATTR_UDP_ZERO_CSUM6_RX]); | |
6b649fea | 231 | #endif |
309795f4 | 232 | } |
309795f4 JC |
233 | |
234 | if (info->attrs[L2TP_ATTR_DEBUG]) | |
235 | cfg.debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); | |
236 | ||
237 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
238 | if (tunnel != NULL) { | |
239 | ret = -EEXIST; | |
240 | goto out; | |
241 | } | |
242 | ||
243 | ret = -EINVAL; | |
244 | switch (cfg.encap) { | |
245 | case L2TP_ENCAPTYPE_UDP: | |
246 | case L2TP_ENCAPTYPE_IP: | |
247 | ret = l2tp_tunnel_create(net, fd, proto_version, tunnel_id, | |
248 | peer_tunnel_id, &cfg, &tunnel); | |
249 | break; | |
250 | } | |
251 | ||
33f72e6f BH |
252 | if (ret >= 0) |
253 | ret = l2tp_tunnel_notify(&l2tp_nl_family, info, | |
254 | tunnel, L2TP_CMD_TUNNEL_CREATE); | |
309795f4 JC |
255 | out: |
256 | return ret; | |
257 | } | |
258 | ||
259 | static int l2tp_nl_cmd_tunnel_delete(struct sk_buff *skb, struct genl_info *info) | |
260 | { | |
261 | struct l2tp_tunnel *tunnel; | |
262 | u32 tunnel_id; | |
263 | int ret = 0; | |
264 | struct net *net = genl_info_net(info); | |
265 | ||
266 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
267 | ret = -EINVAL; | |
268 | goto out; | |
269 | } | |
270 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
271 | ||
272 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
273 | if (tunnel == NULL) { | |
274 | ret = -ENODEV; | |
275 | goto out; | |
276 | } | |
277 | ||
33f72e6f BH |
278 | l2tp_tunnel_notify(&l2tp_nl_family, info, |
279 | tunnel, L2TP_CMD_TUNNEL_DELETE); | |
280 | ||
309795f4 JC |
281 | (void) l2tp_tunnel_delete(tunnel); |
282 | ||
283 | out: | |
284 | return ret; | |
285 | } | |
286 | ||
287 | static int l2tp_nl_cmd_tunnel_modify(struct sk_buff *skb, struct genl_info *info) | |
288 | { | |
289 | struct l2tp_tunnel *tunnel; | |
290 | u32 tunnel_id; | |
291 | int ret = 0; | |
292 | struct net *net = genl_info_net(info); | |
293 | ||
294 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
295 | ret = -EINVAL; | |
296 | goto out; | |
297 | } | |
298 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
299 | ||
300 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
301 | if (tunnel == NULL) { | |
302 | ret = -ENODEV; | |
303 | goto out; | |
304 | } | |
305 | ||
306 | if (info->attrs[L2TP_ATTR_DEBUG]) | |
307 | tunnel->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); | |
308 | ||
33f72e6f BH |
309 | ret = l2tp_tunnel_notify(&l2tp_nl_family, info, |
310 | tunnel, L2TP_CMD_TUNNEL_MODIFY); | |
311 | ||
309795f4 JC |
312 | out: |
313 | return ret; | |
314 | } | |
315 | ||
15e47304 | 316 | static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 portid, u32 seq, int flags, |
33f72e6f | 317 | struct l2tp_tunnel *tunnel, u8 cmd) |
309795f4 JC |
318 | { |
319 | void *hdr; | |
320 | struct nlattr *nest; | |
321 | struct sock *sk = NULL; | |
322 | struct inet_sock *inet; | |
f9bac8df CE |
323 | #if IS_ENABLED(CONFIG_IPV6) |
324 | struct ipv6_pinfo *np = NULL; | |
325 | #endif | |
309795f4 | 326 | |
33f72e6f | 327 | hdr = genlmsg_put(skb, portid, seq, &l2tp_nl_family, flags, cmd); |
7f8436a1 WY |
328 | if (!hdr) |
329 | return -EMSGSIZE; | |
309795f4 | 330 | |
60aed2ab DM |
331 | if (nla_put_u8(skb, L2TP_ATTR_PROTO_VERSION, tunnel->version) || |
332 | nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id) || | |
333 | nla_put_u32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id) || | |
334 | nla_put_u32(skb, L2TP_ATTR_DEBUG, tunnel->debug) || | |
335 | nla_put_u16(skb, L2TP_ATTR_ENCAP_TYPE, tunnel->encap)) | |
336 | goto nla_put_failure; | |
309795f4 JC |
337 | |
338 | nest = nla_nest_start(skb, L2TP_ATTR_STATS); | |
339 | if (nest == NULL) | |
340 | goto nla_put_failure; | |
341 | ||
1c714a92 ND |
342 | if (nla_put_u64_64bit(skb, L2TP_ATTR_TX_PACKETS, |
343 | atomic_long_read(&tunnel->stats.tx_packets), | |
344 | L2TP_ATTR_STATS_PAD) || | |
345 | nla_put_u64_64bit(skb, L2TP_ATTR_TX_BYTES, | |
346 | atomic_long_read(&tunnel->stats.tx_bytes), | |
347 | L2TP_ATTR_STATS_PAD) || | |
348 | nla_put_u64_64bit(skb, L2TP_ATTR_TX_ERRORS, | |
349 | atomic_long_read(&tunnel->stats.tx_errors), | |
350 | L2TP_ATTR_STATS_PAD) || | |
351 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_PACKETS, | |
352 | atomic_long_read(&tunnel->stats.rx_packets), | |
353 | L2TP_ATTR_STATS_PAD) || | |
354 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_BYTES, | |
355 | atomic_long_read(&tunnel->stats.rx_bytes), | |
356 | L2TP_ATTR_STATS_PAD) || | |
357 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_SEQ_DISCARDS, | |
358 | atomic_long_read(&tunnel->stats.rx_seq_discards), | |
359 | L2TP_ATTR_STATS_PAD) || | |
360 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_OOS_PACKETS, | |
361 | atomic_long_read(&tunnel->stats.rx_oos_packets), | |
362 | L2TP_ATTR_STATS_PAD) || | |
363 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_ERRORS, | |
364 | atomic_long_read(&tunnel->stats.rx_errors), | |
365 | L2TP_ATTR_STATS_PAD)) | |
60aed2ab | 366 | goto nla_put_failure; |
309795f4 JC |
367 | nla_nest_end(skb, nest); |
368 | ||
369 | sk = tunnel->sock; | |
370 | if (!sk) | |
371 | goto out; | |
372 | ||
f9bac8df CE |
373 | #if IS_ENABLED(CONFIG_IPV6) |
374 | if (sk->sk_family == AF_INET6) | |
375 | np = inet6_sk(sk); | |
376 | #endif | |
377 | ||
309795f4 JC |
378 | inet = inet_sk(sk); |
379 | ||
380 | switch (tunnel->encap) { | |
381 | case L2TP_ENCAPTYPE_UDP: | |
7ff516ff AST |
382 | switch (sk->sk_family) { |
383 | case AF_INET: | |
384 | if (nla_put_u8(skb, L2TP_ATTR_UDP_CSUM, !sk->sk_no_check_tx)) | |
385 | goto nla_put_failure; | |
386 | break; | |
97b7af09 AST |
387 | #if IS_ENABLED(CONFIG_IPV6) |
388 | case AF_INET6: | |
389 | if (udp_get_no_check6_tx(sk) && | |
390 | nla_put_flag(skb, L2TP_ATTR_UDP_ZERO_CSUM6_TX)) | |
391 | goto nla_put_failure; | |
392 | if (udp_get_no_check6_rx(sk) && | |
393 | nla_put_flag(skb, L2TP_ATTR_UDP_ZERO_CSUM6_RX)) | |
394 | goto nla_put_failure; | |
395 | break; | |
396 | #endif | |
7ff516ff | 397 | } |
60aed2ab | 398 | if (nla_put_u16(skb, L2TP_ATTR_UDP_SPORT, ntohs(inet->inet_sport)) || |
7ff516ff | 399 | nla_put_u16(skb, L2TP_ATTR_UDP_DPORT, ntohs(inet->inet_dport))) |
60aed2ab | 400 | goto nla_put_failure; |
309795f4 JC |
401 | /* NOBREAK */ |
402 | case L2TP_ENCAPTYPE_IP: | |
f9bac8df CE |
403 | #if IS_ENABLED(CONFIG_IPV6) |
404 | if (np) { | |
930345ea JB |
405 | if (nla_put_in6_addr(skb, L2TP_ATTR_IP6_SADDR, |
406 | &np->saddr) || | |
407 | nla_put_in6_addr(skb, L2TP_ATTR_IP6_DADDR, | |
408 | &sk->sk_v6_daddr)) | |
f9bac8df CE |
409 | goto nla_put_failure; |
410 | } else | |
411 | #endif | |
930345ea JB |
412 | if (nla_put_in_addr(skb, L2TP_ATTR_IP_SADDR, |
413 | inet->inet_saddr) || | |
414 | nla_put_in_addr(skb, L2TP_ATTR_IP_DADDR, | |
415 | inet->inet_daddr)) | |
60aed2ab | 416 | goto nla_put_failure; |
309795f4 JC |
417 | break; |
418 | } | |
419 | ||
420 | out: | |
053c095a JB |
421 | genlmsg_end(skb, hdr); |
422 | return 0; | |
309795f4 JC |
423 | |
424 | nla_put_failure: | |
425 | genlmsg_cancel(skb, hdr); | |
426 | return -1; | |
427 | } | |
428 | ||
429 | static int l2tp_nl_cmd_tunnel_get(struct sk_buff *skb, struct genl_info *info) | |
430 | { | |
431 | struct l2tp_tunnel *tunnel; | |
432 | struct sk_buff *msg; | |
433 | u32 tunnel_id; | |
434 | int ret = -ENOBUFS; | |
435 | struct net *net = genl_info_net(info); | |
436 | ||
437 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
438 | ret = -EINVAL; | |
439 | goto out; | |
440 | } | |
441 | ||
442 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
443 | ||
444 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
445 | if (tunnel == NULL) { | |
446 | ret = -ENODEV; | |
447 | goto out; | |
448 | } | |
449 | ||
58050fce | 450 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
309795f4 JC |
451 | if (!msg) { |
452 | ret = -ENOMEM; | |
453 | goto out; | |
454 | } | |
455 | ||
15e47304 | 456 | ret = l2tp_nl_tunnel_send(msg, info->snd_portid, info->snd_seq, |
33f72e6f | 457 | NLM_F_ACK, tunnel, L2TP_CMD_TUNNEL_GET); |
309795f4 JC |
458 | if (ret < 0) |
459 | goto err_out; | |
460 | ||
15e47304 | 461 | return genlmsg_unicast(net, msg, info->snd_portid); |
309795f4 JC |
462 | |
463 | err_out: | |
464 | nlmsg_free(msg); | |
465 | ||
466 | out: | |
467 | return ret; | |
468 | } | |
469 | ||
470 | static int l2tp_nl_cmd_tunnel_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
471 | { | |
472 | int ti = cb->args[0]; | |
473 | struct l2tp_tunnel *tunnel; | |
474 | struct net *net = sock_net(skb->sk); | |
475 | ||
476 | for (;;) { | |
477 | tunnel = l2tp_tunnel_find_nth(net, ti); | |
478 | if (tunnel == NULL) | |
479 | goto out; | |
480 | ||
15e47304 | 481 | if (l2tp_nl_tunnel_send(skb, NETLINK_CB(cb->skb).portid, |
309795f4 | 482 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
053c095a | 483 | tunnel, L2TP_CMD_TUNNEL_GET) < 0) |
309795f4 JC |
484 | goto out; |
485 | ||
486 | ti++; | |
487 | } | |
488 | ||
489 | out: | |
490 | cb->args[0] = ti; | |
491 | ||
492 | return skb->len; | |
493 | } | |
494 | ||
495 | static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *info) | |
496 | { | |
497 | u32 tunnel_id = 0; | |
498 | u32 session_id; | |
499 | u32 peer_session_id; | |
500 | int ret = 0; | |
501 | struct l2tp_tunnel *tunnel; | |
502 | struct l2tp_session *session; | |
503 | struct l2tp_session_cfg cfg = { 0, }; | |
504 | struct net *net = genl_info_net(info); | |
505 | ||
506 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
507 | ret = -EINVAL; | |
508 | goto out; | |
509 | } | |
510 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
511 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
512 | if (!tunnel) { | |
513 | ret = -ENODEV; | |
514 | goto out; | |
515 | } | |
516 | ||
517 | if (!info->attrs[L2TP_ATTR_SESSION_ID]) { | |
518 | ret = -EINVAL; | |
519 | goto out; | |
520 | } | |
521 | session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]); | |
522 | session = l2tp_session_find(net, tunnel, session_id); | |
523 | if (session) { | |
524 | ret = -EEXIST; | |
525 | goto out; | |
526 | } | |
527 | ||
528 | if (!info->attrs[L2TP_ATTR_PEER_SESSION_ID]) { | |
529 | ret = -EINVAL; | |
530 | goto out; | |
531 | } | |
532 | peer_session_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_SESSION_ID]); | |
533 | ||
534 | if (!info->attrs[L2TP_ATTR_PW_TYPE]) { | |
535 | ret = -EINVAL; | |
536 | goto out; | |
537 | } | |
538 | cfg.pw_type = nla_get_u16(info->attrs[L2TP_ATTR_PW_TYPE]); | |
539 | if (cfg.pw_type >= __L2TP_PWTYPE_MAX) { | |
540 | ret = -EINVAL; | |
541 | goto out; | |
542 | } | |
543 | ||
544 | if (tunnel->version > 2) { | |
545 | if (info->attrs[L2TP_ATTR_OFFSET]) | |
546 | cfg.offset = nla_get_u16(info->attrs[L2TP_ATTR_OFFSET]); | |
547 | ||
548 | if (info->attrs[L2TP_ATTR_DATA_SEQ]) | |
549 | cfg.data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]); | |
550 | ||
551 | cfg.l2specific_type = L2TP_L2SPECTYPE_DEFAULT; | |
552 | if (info->attrs[L2TP_ATTR_L2SPEC_TYPE]) | |
553 | cfg.l2specific_type = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_TYPE]); | |
554 | ||
555 | cfg.l2specific_len = 4; | |
556 | if (info->attrs[L2TP_ATTR_L2SPEC_LEN]) | |
557 | cfg.l2specific_len = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_LEN]); | |
558 | ||
559 | if (info->attrs[L2TP_ATTR_COOKIE]) { | |
560 | u16 len = nla_len(info->attrs[L2TP_ATTR_COOKIE]); | |
561 | if (len > 8) { | |
562 | ret = -EINVAL; | |
563 | goto out; | |
564 | } | |
565 | cfg.cookie_len = len; | |
566 | memcpy(&cfg.cookie[0], nla_data(info->attrs[L2TP_ATTR_COOKIE]), len); | |
567 | } | |
568 | if (info->attrs[L2TP_ATTR_PEER_COOKIE]) { | |
569 | u16 len = nla_len(info->attrs[L2TP_ATTR_PEER_COOKIE]); | |
570 | if (len > 8) { | |
571 | ret = -EINVAL; | |
572 | goto out; | |
573 | } | |
574 | cfg.peer_cookie_len = len; | |
575 | memcpy(&cfg.peer_cookie[0], nla_data(info->attrs[L2TP_ATTR_PEER_COOKIE]), len); | |
576 | } | |
577 | if (info->attrs[L2TP_ATTR_IFNAME]) | |
578 | cfg.ifname = nla_data(info->attrs[L2TP_ATTR_IFNAME]); | |
579 | ||
580 | if (info->attrs[L2TP_ATTR_VLAN_ID]) | |
581 | cfg.vlan_id = nla_get_u16(info->attrs[L2TP_ATTR_VLAN_ID]); | |
582 | } | |
583 | ||
584 | if (info->attrs[L2TP_ATTR_DEBUG]) | |
585 | cfg.debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); | |
586 | ||
587 | if (info->attrs[L2TP_ATTR_RECV_SEQ]) | |
588 | cfg.recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]); | |
589 | ||
590 | if (info->attrs[L2TP_ATTR_SEND_SEQ]) | |
591 | cfg.send_seq = nla_get_u8(info->attrs[L2TP_ATTR_SEND_SEQ]); | |
592 | ||
593 | if (info->attrs[L2TP_ATTR_LNS_MODE]) | |
594 | cfg.lns_mode = nla_get_u8(info->attrs[L2TP_ATTR_LNS_MODE]); | |
595 | ||
596 | if (info->attrs[L2TP_ATTR_RECV_TIMEOUT]) | |
597 | cfg.reorder_timeout = nla_get_msecs(info->attrs[L2TP_ATTR_RECV_TIMEOUT]); | |
598 | ||
599 | if (info->attrs[L2TP_ATTR_MTU]) | |
600 | cfg.mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]); | |
601 | ||
602 | if (info->attrs[L2TP_ATTR_MRU]) | |
603 | cfg.mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]); | |
604 | ||
f1f39f91 | 605 | #ifdef CONFIG_MODULES |
606 | if (l2tp_nl_cmd_ops[cfg.pw_type] == NULL) { | |
607 | genl_unlock(); | |
608 | request_module("net-l2tp-type-%u", cfg.pw_type); | |
609 | genl_lock(); | |
610 | } | |
611 | #endif | |
309795f4 JC |
612 | if ((l2tp_nl_cmd_ops[cfg.pw_type] == NULL) || |
613 | (l2tp_nl_cmd_ops[cfg.pw_type]->session_create == NULL)) { | |
614 | ret = -EPROTONOSUPPORT; | |
615 | goto out; | |
616 | } | |
617 | ||
618 | /* Check that pseudowire-specific params are present */ | |
619 | switch (cfg.pw_type) { | |
620 | case L2TP_PWTYPE_NONE: | |
621 | break; | |
622 | case L2TP_PWTYPE_ETH_VLAN: | |
623 | if (!info->attrs[L2TP_ATTR_VLAN_ID]) { | |
624 | ret = -EINVAL; | |
625 | goto out; | |
626 | } | |
627 | break; | |
628 | case L2TP_PWTYPE_ETH: | |
629 | break; | |
630 | case L2TP_PWTYPE_PPP: | |
631 | case L2TP_PWTYPE_PPP_AC: | |
632 | break; | |
633 | case L2TP_PWTYPE_IP: | |
634 | default: | |
635 | ret = -EPROTONOSUPPORT; | |
636 | break; | |
637 | } | |
638 | ||
639 | ret = -EPROTONOSUPPORT; | |
640 | if (l2tp_nl_cmd_ops[cfg.pw_type]->session_create) | |
641 | ret = (*l2tp_nl_cmd_ops[cfg.pw_type]->session_create)(net, tunnel_id, | |
642 | session_id, peer_session_id, &cfg); | |
643 | ||
33f72e6f BH |
644 | if (ret >= 0) { |
645 | session = l2tp_session_find(net, tunnel, session_id); | |
646 | if (session) | |
647 | ret = l2tp_session_notify(&l2tp_nl_family, info, session, | |
648 | L2TP_CMD_SESSION_CREATE); | |
649 | } | |
650 | ||
309795f4 JC |
651 | out: |
652 | return ret; | |
653 | } | |
654 | ||
655 | static int l2tp_nl_cmd_session_delete(struct sk_buff *skb, struct genl_info *info) | |
656 | { | |
657 | int ret = 0; | |
658 | struct l2tp_session *session; | |
659 | u16 pw_type; | |
660 | ||
661 | session = l2tp_nl_session_find(info); | |
662 | if (session == NULL) { | |
663 | ret = -ENODEV; | |
664 | goto out; | |
665 | } | |
666 | ||
33f72e6f BH |
667 | l2tp_session_notify(&l2tp_nl_family, info, |
668 | session, L2TP_CMD_SESSION_DELETE); | |
669 | ||
309795f4 JC |
670 | pw_type = session->pwtype; |
671 | if (pw_type < __L2TP_PWTYPE_MAX) | |
672 | if (l2tp_nl_cmd_ops[pw_type] && l2tp_nl_cmd_ops[pw_type]->session_delete) | |
673 | ret = (*l2tp_nl_cmd_ops[pw_type]->session_delete)(session); | |
674 | ||
675 | out: | |
676 | return ret; | |
677 | } | |
678 | ||
679 | static int l2tp_nl_cmd_session_modify(struct sk_buff *skb, struct genl_info *info) | |
680 | { | |
681 | int ret = 0; | |
682 | struct l2tp_session *session; | |
683 | ||
684 | session = l2tp_nl_session_find(info); | |
685 | if (session == NULL) { | |
686 | ret = -ENODEV; | |
687 | goto out; | |
688 | } | |
689 | ||
690 | if (info->attrs[L2TP_ATTR_DEBUG]) | |
691 | session->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); | |
692 | ||
693 | if (info->attrs[L2TP_ATTR_DATA_SEQ]) | |
694 | session->data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]); | |
695 | ||
696 | if (info->attrs[L2TP_ATTR_RECV_SEQ]) | |
697 | session->recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]); | |
698 | ||
bb5016ea | 699 | if (info->attrs[L2TP_ATTR_SEND_SEQ]) { |
309795f4 | 700 | session->send_seq = nla_get_u8(info->attrs[L2TP_ATTR_SEND_SEQ]); |
bb5016ea GN |
701 | l2tp_session_set_header_len(session, session->tunnel->version); |
702 | } | |
309795f4 JC |
703 | |
704 | if (info->attrs[L2TP_ATTR_LNS_MODE]) | |
705 | session->lns_mode = nla_get_u8(info->attrs[L2TP_ATTR_LNS_MODE]); | |
706 | ||
707 | if (info->attrs[L2TP_ATTR_RECV_TIMEOUT]) | |
708 | session->reorder_timeout = nla_get_msecs(info->attrs[L2TP_ATTR_RECV_TIMEOUT]); | |
709 | ||
710 | if (info->attrs[L2TP_ATTR_MTU]) | |
711 | session->mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]); | |
712 | ||
713 | if (info->attrs[L2TP_ATTR_MRU]) | |
714 | session->mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]); | |
715 | ||
33f72e6f BH |
716 | ret = l2tp_session_notify(&l2tp_nl_family, info, |
717 | session, L2TP_CMD_SESSION_MODIFY); | |
718 | ||
309795f4 JC |
719 | out: |
720 | return ret; | |
721 | } | |
722 | ||
15e47304 | 723 | static int l2tp_nl_session_send(struct sk_buff *skb, u32 portid, u32 seq, int flags, |
33f72e6f | 724 | struct l2tp_session *session, u8 cmd) |
309795f4 JC |
725 | { |
726 | void *hdr; | |
727 | struct nlattr *nest; | |
728 | struct l2tp_tunnel *tunnel = session->tunnel; | |
729 | struct sock *sk = NULL; | |
730 | ||
731 | sk = tunnel->sock; | |
732 | ||
33f72e6f | 733 | hdr = genlmsg_put(skb, portid, seq, &l2tp_nl_family, flags, cmd); |
7f8436a1 WY |
734 | if (!hdr) |
735 | return -EMSGSIZE; | |
309795f4 | 736 | |
60aed2ab DM |
737 | if (nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id) || |
738 | nla_put_u32(skb, L2TP_ATTR_SESSION_ID, session->session_id) || | |
739 | nla_put_u32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id) || | |
740 | nla_put_u32(skb, L2TP_ATTR_PEER_SESSION_ID, | |
741 | session->peer_session_id) || | |
742 | nla_put_u32(skb, L2TP_ATTR_DEBUG, session->debug) || | |
743 | nla_put_u16(skb, L2TP_ATTR_PW_TYPE, session->pwtype) || | |
744 | nla_put_u16(skb, L2TP_ATTR_MTU, session->mtu) || | |
745 | (session->mru && | |
746 | nla_put_u16(skb, L2TP_ATTR_MRU, session->mru))) | |
747 | goto nla_put_failure; | |
748 | ||
e269ed26 | 749 | if ((session->ifname[0] && |
60aed2ab DM |
750 | nla_put_string(skb, L2TP_ATTR_IFNAME, session->ifname)) || |
751 | (session->cookie_len && | |
752 | nla_put(skb, L2TP_ATTR_COOKIE, session->cookie_len, | |
753 | &session->cookie[0])) || | |
754 | (session->peer_cookie_len && | |
755 | nla_put(skb, L2TP_ATTR_PEER_COOKIE, session->peer_cookie_len, | |
756 | &session->peer_cookie[0])) || | |
757 | nla_put_u8(skb, L2TP_ATTR_RECV_SEQ, session->recv_seq) || | |
758 | nla_put_u8(skb, L2TP_ATTR_SEND_SEQ, session->send_seq) || | |
759 | nla_put_u8(skb, L2TP_ATTR_LNS_MODE, session->lns_mode) || | |
309795f4 | 760 | #ifdef CONFIG_XFRM |
60aed2ab DM |
761 | (((sk) && (sk->sk_policy[0] || sk->sk_policy[1])) && |
762 | nla_put_u8(skb, L2TP_ATTR_USING_IPSEC, 1)) || | |
309795f4 | 763 | #endif |
60aed2ab | 764 | (session->reorder_timeout && |
2175d87c ND |
765 | nla_put_msecs(skb, L2TP_ATTR_RECV_TIMEOUT, |
766 | session->reorder_timeout, L2TP_ATTR_PAD))) | |
60aed2ab | 767 | goto nla_put_failure; |
5de7aee5 | 768 | |
309795f4 JC |
769 | nest = nla_nest_start(skb, L2TP_ATTR_STATS); |
770 | if (nest == NULL) | |
771 | goto nla_put_failure; | |
5de7aee5 | 772 | |
1c714a92 ND |
773 | if (nla_put_u64_64bit(skb, L2TP_ATTR_TX_PACKETS, |
774 | atomic_long_read(&session->stats.tx_packets), | |
775 | L2TP_ATTR_STATS_PAD) || | |
776 | nla_put_u64_64bit(skb, L2TP_ATTR_TX_BYTES, | |
777 | atomic_long_read(&session->stats.tx_bytes), | |
778 | L2TP_ATTR_STATS_PAD) || | |
779 | nla_put_u64_64bit(skb, L2TP_ATTR_TX_ERRORS, | |
780 | atomic_long_read(&session->stats.tx_errors), | |
781 | L2TP_ATTR_STATS_PAD) || | |
782 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_PACKETS, | |
783 | atomic_long_read(&session->stats.rx_packets), | |
784 | L2TP_ATTR_STATS_PAD) || | |
785 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_BYTES, | |
786 | atomic_long_read(&session->stats.rx_bytes), | |
787 | L2TP_ATTR_STATS_PAD) || | |
788 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_SEQ_DISCARDS, | |
789 | atomic_long_read(&session->stats.rx_seq_discards), | |
790 | L2TP_ATTR_STATS_PAD) || | |
791 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_OOS_PACKETS, | |
792 | atomic_long_read(&session->stats.rx_oos_packets), | |
793 | L2TP_ATTR_STATS_PAD) || | |
794 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_ERRORS, | |
795 | atomic_long_read(&session->stats.rx_errors), | |
796 | L2TP_ATTR_STATS_PAD)) | |
60aed2ab | 797 | goto nla_put_failure; |
309795f4 JC |
798 | nla_nest_end(skb, nest); |
799 | ||
053c095a JB |
800 | genlmsg_end(skb, hdr); |
801 | return 0; | |
309795f4 JC |
802 | |
803 | nla_put_failure: | |
804 | genlmsg_cancel(skb, hdr); | |
805 | return -1; | |
806 | } | |
807 | ||
808 | static int l2tp_nl_cmd_session_get(struct sk_buff *skb, struct genl_info *info) | |
809 | { | |
810 | struct l2tp_session *session; | |
811 | struct sk_buff *msg; | |
812 | int ret; | |
813 | ||
814 | session = l2tp_nl_session_find(info); | |
815 | if (session == NULL) { | |
816 | ret = -ENODEV; | |
817 | goto out; | |
818 | } | |
819 | ||
58050fce | 820 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
309795f4 JC |
821 | if (!msg) { |
822 | ret = -ENOMEM; | |
823 | goto out; | |
824 | } | |
825 | ||
15e47304 | 826 | ret = l2tp_nl_session_send(msg, info->snd_portid, info->snd_seq, |
33f72e6f | 827 | 0, session, L2TP_CMD_SESSION_GET); |
309795f4 JC |
828 | if (ret < 0) |
829 | goto err_out; | |
830 | ||
15e47304 | 831 | return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid); |
309795f4 JC |
832 | |
833 | err_out: | |
834 | nlmsg_free(msg); | |
835 | ||
836 | out: | |
837 | return ret; | |
838 | } | |
839 | ||
840 | static int l2tp_nl_cmd_session_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
841 | { | |
842 | struct net *net = sock_net(skb->sk); | |
843 | struct l2tp_session *session; | |
844 | struct l2tp_tunnel *tunnel = NULL; | |
845 | int ti = cb->args[0]; | |
846 | int si = cb->args[1]; | |
847 | ||
848 | for (;;) { | |
849 | if (tunnel == NULL) { | |
850 | tunnel = l2tp_tunnel_find_nth(net, ti); | |
851 | if (tunnel == NULL) | |
852 | goto out; | |
853 | } | |
854 | ||
855 | session = l2tp_session_find_nth(tunnel, si); | |
856 | if (session == NULL) { | |
857 | ti++; | |
858 | tunnel = NULL; | |
859 | si = 0; | |
860 | continue; | |
861 | } | |
862 | ||
15e47304 | 863 | if (l2tp_nl_session_send(skb, NETLINK_CB(cb->skb).portid, |
309795f4 | 864 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
053c095a | 865 | session, L2TP_CMD_SESSION_GET) < 0) |
309795f4 JC |
866 | break; |
867 | ||
868 | si++; | |
869 | } | |
870 | ||
871 | out: | |
872 | cb->args[0] = ti; | |
873 | cb->args[1] = si; | |
874 | ||
875 | return skb->len; | |
876 | } | |
877 | ||
f5bb341e | 878 | static const struct nla_policy l2tp_nl_policy[L2TP_ATTR_MAX + 1] = { |
309795f4 JC |
879 | [L2TP_ATTR_NONE] = { .type = NLA_UNSPEC, }, |
880 | [L2TP_ATTR_PW_TYPE] = { .type = NLA_U16, }, | |
881 | [L2TP_ATTR_ENCAP_TYPE] = { .type = NLA_U16, }, | |
882 | [L2TP_ATTR_OFFSET] = { .type = NLA_U16, }, | |
883 | [L2TP_ATTR_DATA_SEQ] = { .type = NLA_U8, }, | |
884 | [L2TP_ATTR_L2SPEC_TYPE] = { .type = NLA_U8, }, | |
885 | [L2TP_ATTR_L2SPEC_LEN] = { .type = NLA_U8, }, | |
886 | [L2TP_ATTR_PROTO_VERSION] = { .type = NLA_U8, }, | |
887 | [L2TP_ATTR_CONN_ID] = { .type = NLA_U32, }, | |
888 | [L2TP_ATTR_PEER_CONN_ID] = { .type = NLA_U32, }, | |
889 | [L2TP_ATTR_SESSION_ID] = { .type = NLA_U32, }, | |
890 | [L2TP_ATTR_PEER_SESSION_ID] = { .type = NLA_U32, }, | |
891 | [L2TP_ATTR_UDP_CSUM] = { .type = NLA_U8, }, | |
892 | [L2TP_ATTR_VLAN_ID] = { .type = NLA_U16, }, | |
893 | [L2TP_ATTR_DEBUG] = { .type = NLA_U32, }, | |
894 | [L2TP_ATTR_RECV_SEQ] = { .type = NLA_U8, }, | |
895 | [L2TP_ATTR_SEND_SEQ] = { .type = NLA_U8, }, | |
896 | [L2TP_ATTR_LNS_MODE] = { .type = NLA_U8, }, | |
897 | [L2TP_ATTR_USING_IPSEC] = { .type = NLA_U8, }, | |
898 | [L2TP_ATTR_RECV_TIMEOUT] = { .type = NLA_MSECS, }, | |
899 | [L2TP_ATTR_FD] = { .type = NLA_U32, }, | |
900 | [L2TP_ATTR_IP_SADDR] = { .type = NLA_U32, }, | |
901 | [L2TP_ATTR_IP_DADDR] = { .type = NLA_U32, }, | |
902 | [L2TP_ATTR_UDP_SPORT] = { .type = NLA_U16, }, | |
903 | [L2TP_ATTR_UDP_DPORT] = { .type = NLA_U16, }, | |
904 | [L2TP_ATTR_MTU] = { .type = NLA_U16, }, | |
905 | [L2TP_ATTR_MRU] = { .type = NLA_U16, }, | |
906 | [L2TP_ATTR_STATS] = { .type = NLA_NESTED, }, | |
f9bac8df CE |
907 | [L2TP_ATTR_IP6_SADDR] = { |
908 | .type = NLA_BINARY, | |
909 | .len = sizeof(struct in6_addr), | |
910 | }, | |
911 | [L2TP_ATTR_IP6_DADDR] = { | |
912 | .type = NLA_BINARY, | |
913 | .len = sizeof(struct in6_addr), | |
914 | }, | |
309795f4 JC |
915 | [L2TP_ATTR_IFNAME] = { |
916 | .type = NLA_NUL_STRING, | |
917 | .len = IFNAMSIZ - 1, | |
918 | }, | |
919 | [L2TP_ATTR_COOKIE] = { | |
920 | .type = NLA_BINARY, | |
921 | .len = 8, | |
922 | }, | |
923 | [L2TP_ATTR_PEER_COOKIE] = { | |
924 | .type = NLA_BINARY, | |
925 | .len = 8, | |
926 | }, | |
927 | }; | |
928 | ||
4534de83 | 929 | static const struct genl_ops l2tp_nl_ops[] = { |
309795f4 JC |
930 | { |
931 | .cmd = L2TP_CMD_NOOP, | |
932 | .doit = l2tp_nl_cmd_noop, | |
933 | .policy = l2tp_nl_policy, | |
934 | /* can be retrieved by unprivileged users */ | |
935 | }, | |
936 | { | |
937 | .cmd = L2TP_CMD_TUNNEL_CREATE, | |
938 | .doit = l2tp_nl_cmd_tunnel_create, | |
939 | .policy = l2tp_nl_policy, | |
940 | .flags = GENL_ADMIN_PERM, | |
941 | }, | |
942 | { | |
943 | .cmd = L2TP_CMD_TUNNEL_DELETE, | |
944 | .doit = l2tp_nl_cmd_tunnel_delete, | |
945 | .policy = l2tp_nl_policy, | |
946 | .flags = GENL_ADMIN_PERM, | |
947 | }, | |
948 | { | |
949 | .cmd = L2TP_CMD_TUNNEL_MODIFY, | |
950 | .doit = l2tp_nl_cmd_tunnel_modify, | |
951 | .policy = l2tp_nl_policy, | |
952 | .flags = GENL_ADMIN_PERM, | |
953 | }, | |
954 | { | |
955 | .cmd = L2TP_CMD_TUNNEL_GET, | |
956 | .doit = l2tp_nl_cmd_tunnel_get, | |
957 | .dumpit = l2tp_nl_cmd_tunnel_dump, | |
958 | .policy = l2tp_nl_policy, | |
959 | .flags = GENL_ADMIN_PERM, | |
960 | }, | |
961 | { | |
962 | .cmd = L2TP_CMD_SESSION_CREATE, | |
963 | .doit = l2tp_nl_cmd_session_create, | |
964 | .policy = l2tp_nl_policy, | |
965 | .flags = GENL_ADMIN_PERM, | |
966 | }, | |
967 | { | |
968 | .cmd = L2TP_CMD_SESSION_DELETE, | |
969 | .doit = l2tp_nl_cmd_session_delete, | |
970 | .policy = l2tp_nl_policy, | |
971 | .flags = GENL_ADMIN_PERM, | |
972 | }, | |
973 | { | |
974 | .cmd = L2TP_CMD_SESSION_MODIFY, | |
975 | .doit = l2tp_nl_cmd_session_modify, | |
976 | .policy = l2tp_nl_policy, | |
977 | .flags = GENL_ADMIN_PERM, | |
978 | }, | |
979 | { | |
980 | .cmd = L2TP_CMD_SESSION_GET, | |
981 | .doit = l2tp_nl_cmd_session_get, | |
982 | .dumpit = l2tp_nl_cmd_session_dump, | |
983 | .policy = l2tp_nl_policy, | |
984 | .flags = GENL_ADMIN_PERM, | |
985 | }, | |
986 | }; | |
987 | ||
56989f6d | 988 | static struct genl_family l2tp_nl_family __ro_after_init = { |
489111e5 JB |
989 | .name = L2TP_GENL_NAME, |
990 | .version = L2TP_GENL_VERSION, | |
991 | .hdrsize = 0, | |
992 | .maxattr = L2TP_ATTR_MAX, | |
993 | .netnsok = true, | |
994 | .module = THIS_MODULE, | |
995 | .ops = l2tp_nl_ops, | |
996 | .n_ops = ARRAY_SIZE(l2tp_nl_ops), | |
997 | .mcgrps = l2tp_multicast_group, | |
998 | .n_mcgrps = ARRAY_SIZE(l2tp_multicast_group), | |
999 | }; | |
1000 | ||
309795f4 JC |
1001 | int l2tp_nl_register_ops(enum l2tp_pwtype pw_type, const struct l2tp_nl_cmd_ops *ops) |
1002 | { | |
1003 | int ret; | |
1004 | ||
1005 | ret = -EINVAL; | |
1006 | if (pw_type >= __L2TP_PWTYPE_MAX) | |
1007 | goto err; | |
1008 | ||
1009 | genl_lock(); | |
1010 | ret = -EBUSY; | |
1011 | if (l2tp_nl_cmd_ops[pw_type]) | |
1012 | goto out; | |
1013 | ||
1014 | l2tp_nl_cmd_ops[pw_type] = ops; | |
8cb49014 | 1015 | ret = 0; |
309795f4 JC |
1016 | |
1017 | out: | |
1018 | genl_unlock(); | |
1019 | err: | |
8cb49014 | 1020 | return ret; |
309795f4 JC |
1021 | } |
1022 | EXPORT_SYMBOL_GPL(l2tp_nl_register_ops); | |
1023 | ||
1024 | void l2tp_nl_unregister_ops(enum l2tp_pwtype pw_type) | |
1025 | { | |
1026 | if (pw_type < __L2TP_PWTYPE_MAX) { | |
1027 | genl_lock(); | |
1028 | l2tp_nl_cmd_ops[pw_type] = NULL; | |
1029 | genl_unlock(); | |
1030 | } | |
1031 | } | |
1032 | EXPORT_SYMBOL_GPL(l2tp_nl_unregister_ops); | |
1033 | ||
56989f6d | 1034 | static int __init l2tp_nl_init(void) |
309795f4 | 1035 | { |
a4ca44fa | 1036 | pr_info("L2TP netlink interface\n"); |
489111e5 | 1037 | return genl_register_family(&l2tp_nl_family); |
309795f4 JC |
1038 | } |
1039 | ||
1040 | static void l2tp_nl_cleanup(void) | |
1041 | { | |
1042 | genl_unregister_family(&l2tp_nl_family); | |
1043 | } | |
1044 | ||
1045 | module_init(l2tp_nl_init); | |
1046 | module_exit(l2tp_nl_cleanup); | |
1047 | ||
1048 | MODULE_AUTHOR("James Chapman <jchapman@katalix.com>"); | |
1049 | MODULE_DESCRIPTION("L2TP netlink"); | |
1050 | MODULE_LICENSE("GPL"); | |
1051 | MODULE_VERSION("1.0"); | |
e9412c37 | 1052 | MODULE_ALIAS_GENL_FAMILY("l2tp"); |