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 | ||
34 | static struct genl_family l2tp_nl_family = { | |
35 | .id = GENL_ID_GENERATE, | |
36 | .name = L2TP_GENL_NAME, | |
37 | .version = L2TP_GENL_VERSION, | |
38 | .hdrsize = 0, | |
39 | .maxattr = L2TP_ATTR_MAX, | |
b6fdfdfa | 40 | .netnsok = true, |
309795f4 JC |
41 | }; |
42 | ||
33f72e6f BH |
43 | static const struct genl_multicast_group l2tp_multicast_group[] = { |
44 | { | |
45 | .name = L2TP_GENL_MCGROUP, | |
46 | }, | |
47 | }; | |
48 | ||
49 | static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 portid, u32 seq, | |
50 | int flags, struct l2tp_tunnel *tunnel, u8 cmd); | |
51 | static int l2tp_nl_session_send(struct sk_buff *skb, u32 portid, u32 seq, | |
52 | int flags, struct l2tp_session *session, | |
53 | u8 cmd); | |
54 | ||
309795f4 JC |
55 | /* Accessed under genl lock */ |
56 | static const struct l2tp_nl_cmd_ops *l2tp_nl_cmd_ops[__L2TP_PWTYPE_MAX]; | |
57 | ||
58 | static struct l2tp_session *l2tp_nl_session_find(struct genl_info *info) | |
59 | { | |
60 | u32 tunnel_id; | |
61 | u32 session_id; | |
62 | char *ifname; | |
63 | struct l2tp_tunnel *tunnel; | |
64 | struct l2tp_session *session = NULL; | |
65 | struct net *net = genl_info_net(info); | |
66 | ||
67 | if (info->attrs[L2TP_ATTR_IFNAME]) { | |
68 | ifname = nla_data(info->attrs[L2TP_ATTR_IFNAME]); | |
69 | session = l2tp_session_find_by_ifname(net, ifname); | |
70 | } else if ((info->attrs[L2TP_ATTR_SESSION_ID]) && | |
71 | (info->attrs[L2TP_ATTR_CONN_ID])) { | |
72 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
73 | session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]); | |
74 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
75 | if (tunnel) | |
76 | session = l2tp_session_find(net, tunnel, session_id); | |
77 | } | |
78 | ||
79 | return session; | |
80 | } | |
81 | ||
82 | static int l2tp_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info) | |
83 | { | |
84 | struct sk_buff *msg; | |
85 | void *hdr; | |
86 | int ret = -ENOBUFS; | |
87 | ||
58050fce | 88 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
309795f4 JC |
89 | if (!msg) { |
90 | ret = -ENOMEM; | |
91 | goto out; | |
92 | } | |
93 | ||
15e47304 | 94 | hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, |
309795f4 | 95 | &l2tp_nl_family, 0, L2TP_CMD_NOOP); |
7f8436a1 WY |
96 | if (!hdr) { |
97 | ret = -EMSGSIZE; | |
309795f4 JC |
98 | goto err_out; |
99 | } | |
100 | ||
101 | genlmsg_end(msg, hdr); | |
102 | ||
15e47304 | 103 | return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid); |
309795f4 JC |
104 | |
105 | err_out: | |
106 | nlmsg_free(msg); | |
107 | ||
108 | out: | |
109 | return ret; | |
110 | } | |
111 | ||
33f72e6f BH |
112 | static int l2tp_tunnel_notify(struct genl_family *family, |
113 | struct genl_info *info, | |
114 | struct l2tp_tunnel *tunnel, | |
115 | u8 cmd) | |
116 | { | |
117 | struct sk_buff *msg; | |
118 | int ret; | |
119 | ||
120 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
121 | if (!msg) | |
122 | return -ENOMEM; | |
123 | ||
124 | ret = l2tp_nl_tunnel_send(msg, info->snd_portid, info->snd_seq, | |
125 | NLM_F_ACK, tunnel, cmd); | |
126 | ||
127 | if (ret >= 0) | |
128 | return genlmsg_multicast_allns(family, msg, 0, 0, GFP_ATOMIC); | |
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 | ||
150 | if (ret >= 0) | |
151 | return genlmsg_multicast_allns(family, msg, 0, 0, GFP_ATOMIC); | |
152 | ||
153 | nlmsg_free(msg); | |
154 | ||
155 | return ret; | |
156 | } | |
157 | ||
309795f4 JC |
158 | static int l2tp_nl_cmd_tunnel_create(struct sk_buff *skb, struct genl_info *info) |
159 | { | |
160 | u32 tunnel_id; | |
161 | u32 peer_tunnel_id; | |
162 | int proto_version; | |
163 | int fd; | |
164 | int ret = 0; | |
165 | struct l2tp_tunnel_cfg cfg = { 0, }; | |
166 | struct l2tp_tunnel *tunnel; | |
167 | struct net *net = genl_info_net(info); | |
168 | ||
169 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
170 | ret = -EINVAL; | |
171 | goto out; | |
172 | } | |
173 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
174 | ||
175 | if (!info->attrs[L2TP_ATTR_PEER_CONN_ID]) { | |
176 | ret = -EINVAL; | |
177 | goto out; | |
178 | } | |
179 | peer_tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_CONN_ID]); | |
180 | ||
181 | if (!info->attrs[L2TP_ATTR_PROTO_VERSION]) { | |
182 | ret = -EINVAL; | |
183 | goto out; | |
184 | } | |
185 | proto_version = nla_get_u8(info->attrs[L2TP_ATTR_PROTO_VERSION]); | |
186 | ||
187 | if (!info->attrs[L2TP_ATTR_ENCAP_TYPE]) { | |
188 | ret = -EINVAL; | |
189 | goto out; | |
190 | } | |
191 | cfg.encap = nla_get_u16(info->attrs[L2TP_ATTR_ENCAP_TYPE]); | |
192 | ||
789a4a2c JC |
193 | fd = -1; |
194 | if (info->attrs[L2TP_ATTR_FD]) { | |
195 | fd = nla_get_u32(info->attrs[L2TP_ATTR_FD]); | |
196 | } else { | |
f9bac8df CE |
197 | #if IS_ENABLED(CONFIG_IPV6) |
198 | if (info->attrs[L2TP_ATTR_IP6_SADDR] && | |
199 | info->attrs[L2TP_ATTR_IP6_DADDR]) { | |
200 | cfg.local_ip6 = nla_data( | |
201 | info->attrs[L2TP_ATTR_IP6_SADDR]); | |
202 | cfg.peer_ip6 = nla_data( | |
203 | info->attrs[L2TP_ATTR_IP6_DADDR]); | |
204 | } else | |
205 | #endif | |
206 | if (info->attrs[L2TP_ATTR_IP_SADDR] && | |
207 | info->attrs[L2TP_ATTR_IP_DADDR]) { | |
67b61f6c | 208 | cfg.local_ip.s_addr = nla_get_in_addr( |
f9bac8df | 209 | info->attrs[L2TP_ATTR_IP_SADDR]); |
67b61f6c | 210 | cfg.peer_ip.s_addr = nla_get_in_addr( |
f9bac8df CE |
211 | info->attrs[L2TP_ATTR_IP_DADDR]); |
212 | } else { | |
213 | ret = -EINVAL; | |
214 | goto out; | |
215 | } | |
789a4a2c JC |
216 | if (info->attrs[L2TP_ATTR_UDP_SPORT]) |
217 | cfg.local_udp_port = nla_get_u16(info->attrs[L2TP_ATTR_UDP_SPORT]); | |
218 | if (info->attrs[L2TP_ATTR_UDP_DPORT]) | |
219 | cfg.peer_udp_port = nla_get_u16(info->attrs[L2TP_ATTR_UDP_DPORT]); | |
220 | if (info->attrs[L2TP_ATTR_UDP_CSUM]) | |
221 | cfg.use_udp_checksums = nla_get_flag(info->attrs[L2TP_ATTR_UDP_CSUM]); | |
6b649fea TH |
222 | |
223 | #if IS_ENABLED(CONFIG_IPV6) | |
224 | if (info->attrs[L2TP_ATTR_UDP_ZERO_CSUM6_TX]) | |
225 | cfg.udp6_zero_tx_checksums = nla_get_flag(info->attrs[L2TP_ATTR_UDP_ZERO_CSUM6_TX]); | |
226 | if (info->attrs[L2TP_ATTR_UDP_ZERO_CSUM6_RX]) | |
227 | cfg.udp6_zero_rx_checksums = nla_get_flag(info->attrs[L2TP_ATTR_UDP_ZERO_CSUM6_RX]); | |
228 | #endif | |
309795f4 | 229 | } |
309795f4 JC |
230 | |
231 | if (info->attrs[L2TP_ATTR_DEBUG]) | |
232 | cfg.debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); | |
233 | ||
234 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
235 | if (tunnel != NULL) { | |
236 | ret = -EEXIST; | |
237 | goto out; | |
238 | } | |
239 | ||
240 | ret = -EINVAL; | |
241 | switch (cfg.encap) { | |
242 | case L2TP_ENCAPTYPE_UDP: | |
243 | case L2TP_ENCAPTYPE_IP: | |
244 | ret = l2tp_tunnel_create(net, fd, proto_version, tunnel_id, | |
245 | peer_tunnel_id, &cfg, &tunnel); | |
246 | break; | |
247 | } | |
248 | ||
33f72e6f BH |
249 | if (ret >= 0) |
250 | ret = l2tp_tunnel_notify(&l2tp_nl_family, info, | |
251 | tunnel, L2TP_CMD_TUNNEL_CREATE); | |
309795f4 JC |
252 | out: |
253 | return ret; | |
254 | } | |
255 | ||
256 | static int l2tp_nl_cmd_tunnel_delete(struct sk_buff *skb, struct genl_info *info) | |
257 | { | |
258 | struct l2tp_tunnel *tunnel; | |
259 | u32 tunnel_id; | |
260 | int ret = 0; | |
261 | struct net *net = genl_info_net(info); | |
262 | ||
263 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
264 | ret = -EINVAL; | |
265 | goto out; | |
266 | } | |
267 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
268 | ||
269 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
270 | if (tunnel == NULL) { | |
271 | ret = -ENODEV; | |
272 | goto out; | |
273 | } | |
274 | ||
33f72e6f BH |
275 | l2tp_tunnel_notify(&l2tp_nl_family, info, |
276 | tunnel, L2TP_CMD_TUNNEL_DELETE); | |
277 | ||
309795f4 JC |
278 | (void) l2tp_tunnel_delete(tunnel); |
279 | ||
280 | out: | |
281 | return ret; | |
282 | } | |
283 | ||
284 | static int l2tp_nl_cmd_tunnel_modify(struct sk_buff *skb, struct genl_info *info) | |
285 | { | |
286 | struct l2tp_tunnel *tunnel; | |
287 | u32 tunnel_id; | |
288 | int ret = 0; | |
289 | struct net *net = genl_info_net(info); | |
290 | ||
291 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
292 | ret = -EINVAL; | |
293 | goto out; | |
294 | } | |
295 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
296 | ||
297 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
298 | if (tunnel == NULL) { | |
299 | ret = -ENODEV; | |
300 | goto out; | |
301 | } | |
302 | ||
303 | if (info->attrs[L2TP_ATTR_DEBUG]) | |
304 | tunnel->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); | |
305 | ||
33f72e6f BH |
306 | ret = l2tp_tunnel_notify(&l2tp_nl_family, info, |
307 | tunnel, L2TP_CMD_TUNNEL_MODIFY); | |
308 | ||
309795f4 JC |
309 | out: |
310 | return ret; | |
311 | } | |
312 | ||
15e47304 | 313 | static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 portid, u32 seq, int flags, |
33f72e6f | 314 | struct l2tp_tunnel *tunnel, u8 cmd) |
309795f4 JC |
315 | { |
316 | void *hdr; | |
317 | struct nlattr *nest; | |
318 | struct sock *sk = NULL; | |
319 | struct inet_sock *inet; | |
f9bac8df CE |
320 | #if IS_ENABLED(CONFIG_IPV6) |
321 | struct ipv6_pinfo *np = NULL; | |
322 | #endif | |
309795f4 | 323 | |
33f72e6f | 324 | hdr = genlmsg_put(skb, portid, seq, &l2tp_nl_family, flags, cmd); |
7f8436a1 WY |
325 | if (!hdr) |
326 | return -EMSGSIZE; | |
309795f4 | 327 | |
60aed2ab DM |
328 | if (nla_put_u8(skb, L2TP_ATTR_PROTO_VERSION, tunnel->version) || |
329 | nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id) || | |
330 | nla_put_u32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id) || | |
331 | nla_put_u32(skb, L2TP_ATTR_DEBUG, tunnel->debug) || | |
332 | nla_put_u16(skb, L2TP_ATTR_ENCAP_TYPE, tunnel->encap)) | |
333 | goto nla_put_failure; | |
309795f4 JC |
334 | |
335 | nest = nla_nest_start(skb, L2TP_ATTR_STATS); | |
336 | if (nest == NULL) | |
337 | goto nla_put_failure; | |
338 | ||
7b7c0719 TP |
339 | if (nla_put_u64(skb, L2TP_ATTR_TX_PACKETS, |
340 | atomic_long_read(&tunnel->stats.tx_packets)) || | |
341 | nla_put_u64(skb, L2TP_ATTR_TX_BYTES, | |
342 | atomic_long_read(&tunnel->stats.tx_bytes)) || | |
343 | nla_put_u64(skb, L2TP_ATTR_TX_ERRORS, | |
344 | atomic_long_read(&tunnel->stats.tx_errors)) || | |
345 | nla_put_u64(skb, L2TP_ATTR_RX_PACKETS, | |
346 | atomic_long_read(&tunnel->stats.rx_packets)) || | |
347 | nla_put_u64(skb, L2TP_ATTR_RX_BYTES, | |
348 | atomic_long_read(&tunnel->stats.rx_bytes)) || | |
60aed2ab | 349 | nla_put_u64(skb, L2TP_ATTR_RX_SEQ_DISCARDS, |
7b7c0719 | 350 | atomic_long_read(&tunnel->stats.rx_seq_discards)) || |
60aed2ab | 351 | nla_put_u64(skb, L2TP_ATTR_RX_OOS_PACKETS, |
7b7c0719 TP |
352 | atomic_long_read(&tunnel->stats.rx_oos_packets)) || |
353 | nla_put_u64(skb, L2TP_ATTR_RX_ERRORS, | |
354 | atomic_long_read(&tunnel->stats.rx_errors))) | |
60aed2ab | 355 | goto nla_put_failure; |
309795f4 JC |
356 | nla_nest_end(skb, nest); |
357 | ||
358 | sk = tunnel->sock; | |
359 | if (!sk) | |
360 | goto out; | |
361 | ||
f9bac8df CE |
362 | #if IS_ENABLED(CONFIG_IPV6) |
363 | if (sk->sk_family == AF_INET6) | |
364 | np = inet6_sk(sk); | |
365 | #endif | |
366 | ||
309795f4 JC |
367 | inet = inet_sk(sk); |
368 | ||
369 | switch (tunnel->encap) { | |
370 | case L2TP_ENCAPTYPE_UDP: | |
60aed2ab DM |
371 | if (nla_put_u16(skb, L2TP_ATTR_UDP_SPORT, ntohs(inet->inet_sport)) || |
372 | nla_put_u16(skb, L2TP_ATTR_UDP_DPORT, ntohs(inet->inet_dport)) || | |
28448b80 | 373 | nla_put_u8(skb, L2TP_ATTR_UDP_CSUM, !sk->sk_no_check_tx)) |
60aed2ab | 374 | goto nla_put_failure; |
309795f4 JC |
375 | /* NOBREAK */ |
376 | case L2TP_ENCAPTYPE_IP: | |
f9bac8df CE |
377 | #if IS_ENABLED(CONFIG_IPV6) |
378 | if (np) { | |
930345ea JB |
379 | if (nla_put_in6_addr(skb, L2TP_ATTR_IP6_SADDR, |
380 | &np->saddr) || | |
381 | nla_put_in6_addr(skb, L2TP_ATTR_IP6_DADDR, | |
382 | &sk->sk_v6_daddr)) | |
f9bac8df CE |
383 | goto nla_put_failure; |
384 | } else | |
385 | #endif | |
930345ea JB |
386 | if (nla_put_in_addr(skb, L2TP_ATTR_IP_SADDR, |
387 | inet->inet_saddr) || | |
388 | nla_put_in_addr(skb, L2TP_ATTR_IP_DADDR, | |
389 | inet->inet_daddr)) | |
60aed2ab | 390 | goto nla_put_failure; |
309795f4 JC |
391 | break; |
392 | } | |
393 | ||
394 | out: | |
053c095a JB |
395 | genlmsg_end(skb, hdr); |
396 | return 0; | |
309795f4 JC |
397 | |
398 | nla_put_failure: | |
399 | genlmsg_cancel(skb, hdr); | |
400 | return -1; | |
401 | } | |
402 | ||
403 | static int l2tp_nl_cmd_tunnel_get(struct sk_buff *skb, struct genl_info *info) | |
404 | { | |
405 | struct l2tp_tunnel *tunnel; | |
406 | struct sk_buff *msg; | |
407 | u32 tunnel_id; | |
408 | int ret = -ENOBUFS; | |
409 | struct net *net = genl_info_net(info); | |
410 | ||
411 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
412 | ret = -EINVAL; | |
413 | goto out; | |
414 | } | |
415 | ||
416 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
417 | ||
418 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
419 | if (tunnel == NULL) { | |
420 | ret = -ENODEV; | |
421 | goto out; | |
422 | } | |
423 | ||
58050fce | 424 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
309795f4 JC |
425 | if (!msg) { |
426 | ret = -ENOMEM; | |
427 | goto out; | |
428 | } | |
429 | ||
15e47304 | 430 | ret = l2tp_nl_tunnel_send(msg, info->snd_portid, info->snd_seq, |
33f72e6f | 431 | NLM_F_ACK, tunnel, L2TP_CMD_TUNNEL_GET); |
309795f4 JC |
432 | if (ret < 0) |
433 | goto err_out; | |
434 | ||
15e47304 | 435 | return genlmsg_unicast(net, msg, info->snd_portid); |
309795f4 JC |
436 | |
437 | err_out: | |
438 | nlmsg_free(msg); | |
439 | ||
440 | out: | |
441 | return ret; | |
442 | } | |
443 | ||
444 | static int l2tp_nl_cmd_tunnel_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
445 | { | |
446 | int ti = cb->args[0]; | |
447 | struct l2tp_tunnel *tunnel; | |
448 | struct net *net = sock_net(skb->sk); | |
449 | ||
450 | for (;;) { | |
451 | tunnel = l2tp_tunnel_find_nth(net, ti); | |
452 | if (tunnel == NULL) | |
453 | goto out; | |
454 | ||
15e47304 | 455 | if (l2tp_nl_tunnel_send(skb, NETLINK_CB(cb->skb).portid, |
309795f4 | 456 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
053c095a | 457 | tunnel, L2TP_CMD_TUNNEL_GET) < 0) |
309795f4 JC |
458 | goto out; |
459 | ||
460 | ti++; | |
461 | } | |
462 | ||
463 | out: | |
464 | cb->args[0] = ti; | |
465 | ||
466 | return skb->len; | |
467 | } | |
468 | ||
469 | static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *info) | |
470 | { | |
471 | u32 tunnel_id = 0; | |
472 | u32 session_id; | |
473 | u32 peer_session_id; | |
474 | int ret = 0; | |
475 | struct l2tp_tunnel *tunnel; | |
476 | struct l2tp_session *session; | |
477 | struct l2tp_session_cfg cfg = { 0, }; | |
478 | struct net *net = genl_info_net(info); | |
479 | ||
480 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
481 | ret = -EINVAL; | |
482 | goto out; | |
483 | } | |
484 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
485 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
486 | if (!tunnel) { | |
487 | ret = -ENODEV; | |
488 | goto out; | |
489 | } | |
490 | ||
491 | if (!info->attrs[L2TP_ATTR_SESSION_ID]) { | |
492 | ret = -EINVAL; | |
493 | goto out; | |
494 | } | |
495 | session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]); | |
496 | session = l2tp_session_find(net, tunnel, session_id); | |
497 | if (session) { | |
498 | ret = -EEXIST; | |
499 | goto out; | |
500 | } | |
501 | ||
502 | if (!info->attrs[L2TP_ATTR_PEER_SESSION_ID]) { | |
503 | ret = -EINVAL; | |
504 | goto out; | |
505 | } | |
506 | peer_session_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_SESSION_ID]); | |
507 | ||
508 | if (!info->attrs[L2TP_ATTR_PW_TYPE]) { | |
509 | ret = -EINVAL; | |
510 | goto out; | |
511 | } | |
512 | cfg.pw_type = nla_get_u16(info->attrs[L2TP_ATTR_PW_TYPE]); | |
513 | if (cfg.pw_type >= __L2TP_PWTYPE_MAX) { | |
514 | ret = -EINVAL; | |
515 | goto out; | |
516 | } | |
517 | ||
518 | if (tunnel->version > 2) { | |
519 | if (info->attrs[L2TP_ATTR_OFFSET]) | |
520 | cfg.offset = nla_get_u16(info->attrs[L2TP_ATTR_OFFSET]); | |
521 | ||
522 | if (info->attrs[L2TP_ATTR_DATA_SEQ]) | |
523 | cfg.data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]); | |
524 | ||
525 | cfg.l2specific_type = L2TP_L2SPECTYPE_DEFAULT; | |
526 | if (info->attrs[L2TP_ATTR_L2SPEC_TYPE]) | |
527 | cfg.l2specific_type = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_TYPE]); | |
528 | ||
529 | cfg.l2specific_len = 4; | |
530 | if (info->attrs[L2TP_ATTR_L2SPEC_LEN]) | |
531 | cfg.l2specific_len = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_LEN]); | |
532 | ||
533 | if (info->attrs[L2TP_ATTR_COOKIE]) { | |
534 | u16 len = nla_len(info->attrs[L2TP_ATTR_COOKIE]); | |
535 | if (len > 8) { | |
536 | ret = -EINVAL; | |
537 | goto out; | |
538 | } | |
539 | cfg.cookie_len = len; | |
540 | memcpy(&cfg.cookie[0], nla_data(info->attrs[L2TP_ATTR_COOKIE]), len); | |
541 | } | |
542 | if (info->attrs[L2TP_ATTR_PEER_COOKIE]) { | |
543 | u16 len = nla_len(info->attrs[L2TP_ATTR_PEER_COOKIE]); | |
544 | if (len > 8) { | |
545 | ret = -EINVAL; | |
546 | goto out; | |
547 | } | |
548 | cfg.peer_cookie_len = len; | |
549 | memcpy(&cfg.peer_cookie[0], nla_data(info->attrs[L2TP_ATTR_PEER_COOKIE]), len); | |
550 | } | |
551 | if (info->attrs[L2TP_ATTR_IFNAME]) | |
552 | cfg.ifname = nla_data(info->attrs[L2TP_ATTR_IFNAME]); | |
553 | ||
554 | if (info->attrs[L2TP_ATTR_VLAN_ID]) | |
555 | cfg.vlan_id = nla_get_u16(info->attrs[L2TP_ATTR_VLAN_ID]); | |
556 | } | |
557 | ||
558 | if (info->attrs[L2TP_ATTR_DEBUG]) | |
559 | cfg.debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); | |
560 | ||
561 | if (info->attrs[L2TP_ATTR_RECV_SEQ]) | |
562 | cfg.recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]); | |
563 | ||
564 | if (info->attrs[L2TP_ATTR_SEND_SEQ]) | |
565 | cfg.send_seq = nla_get_u8(info->attrs[L2TP_ATTR_SEND_SEQ]); | |
566 | ||
567 | if (info->attrs[L2TP_ATTR_LNS_MODE]) | |
568 | cfg.lns_mode = nla_get_u8(info->attrs[L2TP_ATTR_LNS_MODE]); | |
569 | ||
570 | if (info->attrs[L2TP_ATTR_RECV_TIMEOUT]) | |
571 | cfg.reorder_timeout = nla_get_msecs(info->attrs[L2TP_ATTR_RECV_TIMEOUT]); | |
572 | ||
573 | if (info->attrs[L2TP_ATTR_MTU]) | |
574 | cfg.mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]); | |
575 | ||
576 | if (info->attrs[L2TP_ATTR_MRU]) | |
577 | cfg.mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]); | |
578 | ||
f1f39f91 | 579 | #ifdef CONFIG_MODULES |
580 | if (l2tp_nl_cmd_ops[cfg.pw_type] == NULL) { | |
581 | genl_unlock(); | |
582 | request_module("net-l2tp-type-%u", cfg.pw_type); | |
583 | genl_lock(); | |
584 | } | |
585 | #endif | |
309795f4 JC |
586 | if ((l2tp_nl_cmd_ops[cfg.pw_type] == NULL) || |
587 | (l2tp_nl_cmd_ops[cfg.pw_type]->session_create == NULL)) { | |
588 | ret = -EPROTONOSUPPORT; | |
589 | goto out; | |
590 | } | |
591 | ||
592 | /* Check that pseudowire-specific params are present */ | |
593 | switch (cfg.pw_type) { | |
594 | case L2TP_PWTYPE_NONE: | |
595 | break; | |
596 | case L2TP_PWTYPE_ETH_VLAN: | |
597 | if (!info->attrs[L2TP_ATTR_VLAN_ID]) { | |
598 | ret = -EINVAL; | |
599 | goto out; | |
600 | } | |
601 | break; | |
602 | case L2TP_PWTYPE_ETH: | |
603 | break; | |
604 | case L2TP_PWTYPE_PPP: | |
605 | case L2TP_PWTYPE_PPP_AC: | |
606 | break; | |
607 | case L2TP_PWTYPE_IP: | |
608 | default: | |
609 | ret = -EPROTONOSUPPORT; | |
610 | break; | |
611 | } | |
612 | ||
613 | ret = -EPROTONOSUPPORT; | |
614 | if (l2tp_nl_cmd_ops[cfg.pw_type]->session_create) | |
615 | ret = (*l2tp_nl_cmd_ops[cfg.pw_type]->session_create)(net, tunnel_id, | |
616 | session_id, peer_session_id, &cfg); | |
617 | ||
33f72e6f BH |
618 | if (ret >= 0) { |
619 | session = l2tp_session_find(net, tunnel, session_id); | |
620 | if (session) | |
621 | ret = l2tp_session_notify(&l2tp_nl_family, info, session, | |
622 | L2TP_CMD_SESSION_CREATE); | |
623 | } | |
624 | ||
309795f4 JC |
625 | out: |
626 | return ret; | |
627 | } | |
628 | ||
629 | static int l2tp_nl_cmd_session_delete(struct sk_buff *skb, struct genl_info *info) | |
630 | { | |
631 | int ret = 0; | |
632 | struct l2tp_session *session; | |
633 | u16 pw_type; | |
634 | ||
635 | session = l2tp_nl_session_find(info); | |
636 | if (session == NULL) { | |
637 | ret = -ENODEV; | |
638 | goto out; | |
639 | } | |
640 | ||
33f72e6f BH |
641 | l2tp_session_notify(&l2tp_nl_family, info, |
642 | session, L2TP_CMD_SESSION_DELETE); | |
643 | ||
309795f4 JC |
644 | pw_type = session->pwtype; |
645 | if (pw_type < __L2TP_PWTYPE_MAX) | |
646 | if (l2tp_nl_cmd_ops[pw_type] && l2tp_nl_cmd_ops[pw_type]->session_delete) | |
647 | ret = (*l2tp_nl_cmd_ops[pw_type]->session_delete)(session); | |
648 | ||
649 | out: | |
650 | return ret; | |
651 | } | |
652 | ||
653 | static int l2tp_nl_cmd_session_modify(struct sk_buff *skb, struct genl_info *info) | |
654 | { | |
655 | int ret = 0; | |
656 | struct l2tp_session *session; | |
657 | ||
658 | session = l2tp_nl_session_find(info); | |
659 | if (session == NULL) { | |
660 | ret = -ENODEV; | |
661 | goto out; | |
662 | } | |
663 | ||
664 | if (info->attrs[L2TP_ATTR_DEBUG]) | |
665 | session->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); | |
666 | ||
667 | if (info->attrs[L2TP_ATTR_DATA_SEQ]) | |
668 | session->data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]); | |
669 | ||
670 | if (info->attrs[L2TP_ATTR_RECV_SEQ]) | |
671 | session->recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]); | |
672 | ||
bb5016ea | 673 | if (info->attrs[L2TP_ATTR_SEND_SEQ]) { |
309795f4 | 674 | session->send_seq = nla_get_u8(info->attrs[L2TP_ATTR_SEND_SEQ]); |
bb5016ea GN |
675 | l2tp_session_set_header_len(session, session->tunnel->version); |
676 | } | |
309795f4 JC |
677 | |
678 | if (info->attrs[L2TP_ATTR_LNS_MODE]) | |
679 | session->lns_mode = nla_get_u8(info->attrs[L2TP_ATTR_LNS_MODE]); | |
680 | ||
681 | if (info->attrs[L2TP_ATTR_RECV_TIMEOUT]) | |
682 | session->reorder_timeout = nla_get_msecs(info->attrs[L2TP_ATTR_RECV_TIMEOUT]); | |
683 | ||
684 | if (info->attrs[L2TP_ATTR_MTU]) | |
685 | session->mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]); | |
686 | ||
687 | if (info->attrs[L2TP_ATTR_MRU]) | |
688 | session->mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]); | |
689 | ||
33f72e6f BH |
690 | ret = l2tp_session_notify(&l2tp_nl_family, info, |
691 | session, L2TP_CMD_SESSION_MODIFY); | |
692 | ||
309795f4 JC |
693 | out: |
694 | return ret; | |
695 | } | |
696 | ||
15e47304 | 697 | static int l2tp_nl_session_send(struct sk_buff *skb, u32 portid, u32 seq, int flags, |
33f72e6f | 698 | struct l2tp_session *session, u8 cmd) |
309795f4 JC |
699 | { |
700 | void *hdr; | |
701 | struct nlattr *nest; | |
702 | struct l2tp_tunnel *tunnel = session->tunnel; | |
703 | struct sock *sk = NULL; | |
704 | ||
705 | sk = tunnel->sock; | |
706 | ||
33f72e6f | 707 | hdr = genlmsg_put(skb, portid, seq, &l2tp_nl_family, flags, cmd); |
7f8436a1 WY |
708 | if (!hdr) |
709 | return -EMSGSIZE; | |
309795f4 | 710 | |
60aed2ab DM |
711 | if (nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id) || |
712 | nla_put_u32(skb, L2TP_ATTR_SESSION_ID, session->session_id) || | |
713 | nla_put_u32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id) || | |
714 | nla_put_u32(skb, L2TP_ATTR_PEER_SESSION_ID, | |
715 | session->peer_session_id) || | |
716 | nla_put_u32(skb, L2TP_ATTR_DEBUG, session->debug) || | |
717 | nla_put_u16(skb, L2TP_ATTR_PW_TYPE, session->pwtype) || | |
718 | nla_put_u16(skb, L2TP_ATTR_MTU, session->mtu) || | |
719 | (session->mru && | |
720 | nla_put_u16(skb, L2TP_ATTR_MRU, session->mru))) | |
721 | goto nla_put_failure; | |
722 | ||
e269ed26 | 723 | if ((session->ifname[0] && |
60aed2ab DM |
724 | nla_put_string(skb, L2TP_ATTR_IFNAME, session->ifname)) || |
725 | (session->cookie_len && | |
726 | nla_put(skb, L2TP_ATTR_COOKIE, session->cookie_len, | |
727 | &session->cookie[0])) || | |
728 | (session->peer_cookie_len && | |
729 | nla_put(skb, L2TP_ATTR_PEER_COOKIE, session->peer_cookie_len, | |
730 | &session->peer_cookie[0])) || | |
731 | nla_put_u8(skb, L2TP_ATTR_RECV_SEQ, session->recv_seq) || | |
732 | nla_put_u8(skb, L2TP_ATTR_SEND_SEQ, session->send_seq) || | |
733 | nla_put_u8(skb, L2TP_ATTR_LNS_MODE, session->lns_mode) || | |
309795f4 | 734 | #ifdef CONFIG_XFRM |
60aed2ab DM |
735 | (((sk) && (sk->sk_policy[0] || sk->sk_policy[1])) && |
736 | nla_put_u8(skb, L2TP_ATTR_USING_IPSEC, 1)) || | |
309795f4 | 737 | #endif |
60aed2ab DM |
738 | (session->reorder_timeout && |
739 | nla_put_msecs(skb, L2TP_ATTR_RECV_TIMEOUT, session->reorder_timeout))) | |
740 | goto nla_put_failure; | |
5de7aee5 | 741 | |
309795f4 JC |
742 | nest = nla_nest_start(skb, L2TP_ATTR_STATS); |
743 | if (nest == NULL) | |
744 | goto nla_put_failure; | |
5de7aee5 | 745 | |
7b7c0719 TP |
746 | if (nla_put_u64(skb, L2TP_ATTR_TX_PACKETS, |
747 | atomic_long_read(&session->stats.tx_packets)) || | |
748 | nla_put_u64(skb, L2TP_ATTR_TX_BYTES, | |
749 | atomic_long_read(&session->stats.tx_bytes)) || | |
750 | nla_put_u64(skb, L2TP_ATTR_TX_ERRORS, | |
751 | atomic_long_read(&session->stats.tx_errors)) || | |
752 | nla_put_u64(skb, L2TP_ATTR_RX_PACKETS, | |
753 | atomic_long_read(&session->stats.rx_packets)) || | |
754 | nla_put_u64(skb, L2TP_ATTR_RX_BYTES, | |
755 | atomic_long_read(&session->stats.rx_bytes)) || | |
60aed2ab | 756 | nla_put_u64(skb, L2TP_ATTR_RX_SEQ_DISCARDS, |
7b7c0719 | 757 | atomic_long_read(&session->stats.rx_seq_discards)) || |
60aed2ab | 758 | nla_put_u64(skb, L2TP_ATTR_RX_OOS_PACKETS, |
7b7c0719 TP |
759 | atomic_long_read(&session->stats.rx_oos_packets)) || |
760 | nla_put_u64(skb, L2TP_ATTR_RX_ERRORS, | |
761 | atomic_long_read(&session->stats.rx_errors))) | |
60aed2ab | 762 | goto nla_put_failure; |
309795f4 JC |
763 | nla_nest_end(skb, nest); |
764 | ||
053c095a JB |
765 | genlmsg_end(skb, hdr); |
766 | return 0; | |
309795f4 JC |
767 | |
768 | nla_put_failure: | |
769 | genlmsg_cancel(skb, hdr); | |
770 | return -1; | |
771 | } | |
772 | ||
773 | static int l2tp_nl_cmd_session_get(struct sk_buff *skb, struct genl_info *info) | |
774 | { | |
775 | struct l2tp_session *session; | |
776 | struct sk_buff *msg; | |
777 | int ret; | |
778 | ||
779 | session = l2tp_nl_session_find(info); | |
780 | if (session == NULL) { | |
781 | ret = -ENODEV; | |
782 | goto out; | |
783 | } | |
784 | ||
58050fce | 785 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
309795f4 JC |
786 | if (!msg) { |
787 | ret = -ENOMEM; | |
788 | goto out; | |
789 | } | |
790 | ||
15e47304 | 791 | ret = l2tp_nl_session_send(msg, info->snd_portid, info->snd_seq, |
33f72e6f | 792 | 0, session, L2TP_CMD_SESSION_GET); |
309795f4 JC |
793 | if (ret < 0) |
794 | goto err_out; | |
795 | ||
15e47304 | 796 | return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid); |
309795f4 JC |
797 | |
798 | err_out: | |
799 | nlmsg_free(msg); | |
800 | ||
801 | out: | |
802 | return ret; | |
803 | } | |
804 | ||
805 | static int l2tp_nl_cmd_session_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
806 | { | |
807 | struct net *net = sock_net(skb->sk); | |
808 | struct l2tp_session *session; | |
809 | struct l2tp_tunnel *tunnel = NULL; | |
810 | int ti = cb->args[0]; | |
811 | int si = cb->args[1]; | |
812 | ||
813 | for (;;) { | |
814 | if (tunnel == NULL) { | |
815 | tunnel = l2tp_tunnel_find_nth(net, ti); | |
816 | if (tunnel == NULL) | |
817 | goto out; | |
818 | } | |
819 | ||
820 | session = l2tp_session_find_nth(tunnel, si); | |
821 | if (session == NULL) { | |
822 | ti++; | |
823 | tunnel = NULL; | |
824 | si = 0; | |
825 | continue; | |
826 | } | |
827 | ||
15e47304 | 828 | if (l2tp_nl_session_send(skb, NETLINK_CB(cb->skb).portid, |
309795f4 | 829 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
053c095a | 830 | session, L2TP_CMD_SESSION_GET) < 0) |
309795f4 JC |
831 | break; |
832 | ||
833 | si++; | |
834 | } | |
835 | ||
836 | out: | |
837 | cb->args[0] = ti; | |
838 | cb->args[1] = si; | |
839 | ||
840 | return skb->len; | |
841 | } | |
842 | ||
843 | static struct nla_policy l2tp_nl_policy[L2TP_ATTR_MAX + 1] = { | |
844 | [L2TP_ATTR_NONE] = { .type = NLA_UNSPEC, }, | |
845 | [L2TP_ATTR_PW_TYPE] = { .type = NLA_U16, }, | |
846 | [L2TP_ATTR_ENCAP_TYPE] = { .type = NLA_U16, }, | |
847 | [L2TP_ATTR_OFFSET] = { .type = NLA_U16, }, | |
848 | [L2TP_ATTR_DATA_SEQ] = { .type = NLA_U8, }, | |
849 | [L2TP_ATTR_L2SPEC_TYPE] = { .type = NLA_U8, }, | |
850 | [L2TP_ATTR_L2SPEC_LEN] = { .type = NLA_U8, }, | |
851 | [L2TP_ATTR_PROTO_VERSION] = { .type = NLA_U8, }, | |
852 | [L2TP_ATTR_CONN_ID] = { .type = NLA_U32, }, | |
853 | [L2TP_ATTR_PEER_CONN_ID] = { .type = NLA_U32, }, | |
854 | [L2TP_ATTR_SESSION_ID] = { .type = NLA_U32, }, | |
855 | [L2TP_ATTR_PEER_SESSION_ID] = { .type = NLA_U32, }, | |
856 | [L2TP_ATTR_UDP_CSUM] = { .type = NLA_U8, }, | |
857 | [L2TP_ATTR_VLAN_ID] = { .type = NLA_U16, }, | |
858 | [L2TP_ATTR_DEBUG] = { .type = NLA_U32, }, | |
859 | [L2TP_ATTR_RECV_SEQ] = { .type = NLA_U8, }, | |
860 | [L2TP_ATTR_SEND_SEQ] = { .type = NLA_U8, }, | |
861 | [L2TP_ATTR_LNS_MODE] = { .type = NLA_U8, }, | |
862 | [L2TP_ATTR_USING_IPSEC] = { .type = NLA_U8, }, | |
863 | [L2TP_ATTR_RECV_TIMEOUT] = { .type = NLA_MSECS, }, | |
864 | [L2TP_ATTR_FD] = { .type = NLA_U32, }, | |
865 | [L2TP_ATTR_IP_SADDR] = { .type = NLA_U32, }, | |
866 | [L2TP_ATTR_IP_DADDR] = { .type = NLA_U32, }, | |
867 | [L2TP_ATTR_UDP_SPORT] = { .type = NLA_U16, }, | |
868 | [L2TP_ATTR_UDP_DPORT] = { .type = NLA_U16, }, | |
869 | [L2TP_ATTR_MTU] = { .type = NLA_U16, }, | |
870 | [L2TP_ATTR_MRU] = { .type = NLA_U16, }, | |
871 | [L2TP_ATTR_STATS] = { .type = NLA_NESTED, }, | |
f9bac8df CE |
872 | [L2TP_ATTR_IP6_SADDR] = { |
873 | .type = NLA_BINARY, | |
874 | .len = sizeof(struct in6_addr), | |
875 | }, | |
876 | [L2TP_ATTR_IP6_DADDR] = { | |
877 | .type = NLA_BINARY, | |
878 | .len = sizeof(struct in6_addr), | |
879 | }, | |
309795f4 JC |
880 | [L2TP_ATTR_IFNAME] = { |
881 | .type = NLA_NUL_STRING, | |
882 | .len = IFNAMSIZ - 1, | |
883 | }, | |
884 | [L2TP_ATTR_COOKIE] = { | |
885 | .type = NLA_BINARY, | |
886 | .len = 8, | |
887 | }, | |
888 | [L2TP_ATTR_PEER_COOKIE] = { | |
889 | .type = NLA_BINARY, | |
890 | .len = 8, | |
891 | }, | |
892 | }; | |
893 | ||
4534de83 | 894 | static const struct genl_ops l2tp_nl_ops[] = { |
309795f4 JC |
895 | { |
896 | .cmd = L2TP_CMD_NOOP, | |
897 | .doit = l2tp_nl_cmd_noop, | |
898 | .policy = l2tp_nl_policy, | |
899 | /* can be retrieved by unprivileged users */ | |
900 | }, | |
901 | { | |
902 | .cmd = L2TP_CMD_TUNNEL_CREATE, | |
903 | .doit = l2tp_nl_cmd_tunnel_create, | |
904 | .policy = l2tp_nl_policy, | |
905 | .flags = GENL_ADMIN_PERM, | |
906 | }, | |
907 | { | |
908 | .cmd = L2TP_CMD_TUNNEL_DELETE, | |
909 | .doit = l2tp_nl_cmd_tunnel_delete, | |
910 | .policy = l2tp_nl_policy, | |
911 | .flags = GENL_ADMIN_PERM, | |
912 | }, | |
913 | { | |
914 | .cmd = L2TP_CMD_TUNNEL_MODIFY, | |
915 | .doit = l2tp_nl_cmd_tunnel_modify, | |
916 | .policy = l2tp_nl_policy, | |
917 | .flags = GENL_ADMIN_PERM, | |
918 | }, | |
919 | { | |
920 | .cmd = L2TP_CMD_TUNNEL_GET, | |
921 | .doit = l2tp_nl_cmd_tunnel_get, | |
922 | .dumpit = l2tp_nl_cmd_tunnel_dump, | |
923 | .policy = l2tp_nl_policy, | |
924 | .flags = GENL_ADMIN_PERM, | |
925 | }, | |
926 | { | |
927 | .cmd = L2TP_CMD_SESSION_CREATE, | |
928 | .doit = l2tp_nl_cmd_session_create, | |
929 | .policy = l2tp_nl_policy, | |
930 | .flags = GENL_ADMIN_PERM, | |
931 | }, | |
932 | { | |
933 | .cmd = L2TP_CMD_SESSION_DELETE, | |
934 | .doit = l2tp_nl_cmd_session_delete, | |
935 | .policy = l2tp_nl_policy, | |
936 | .flags = GENL_ADMIN_PERM, | |
937 | }, | |
938 | { | |
939 | .cmd = L2TP_CMD_SESSION_MODIFY, | |
940 | .doit = l2tp_nl_cmd_session_modify, | |
941 | .policy = l2tp_nl_policy, | |
942 | .flags = GENL_ADMIN_PERM, | |
943 | }, | |
944 | { | |
945 | .cmd = L2TP_CMD_SESSION_GET, | |
946 | .doit = l2tp_nl_cmd_session_get, | |
947 | .dumpit = l2tp_nl_cmd_session_dump, | |
948 | .policy = l2tp_nl_policy, | |
949 | .flags = GENL_ADMIN_PERM, | |
950 | }, | |
951 | }; | |
952 | ||
953 | int l2tp_nl_register_ops(enum l2tp_pwtype pw_type, const struct l2tp_nl_cmd_ops *ops) | |
954 | { | |
955 | int ret; | |
956 | ||
957 | ret = -EINVAL; | |
958 | if (pw_type >= __L2TP_PWTYPE_MAX) | |
959 | goto err; | |
960 | ||
961 | genl_lock(); | |
962 | ret = -EBUSY; | |
963 | if (l2tp_nl_cmd_ops[pw_type]) | |
964 | goto out; | |
965 | ||
966 | l2tp_nl_cmd_ops[pw_type] = ops; | |
8cb49014 | 967 | ret = 0; |
309795f4 JC |
968 | |
969 | out: | |
970 | genl_unlock(); | |
971 | err: | |
8cb49014 | 972 | return ret; |
309795f4 JC |
973 | } |
974 | EXPORT_SYMBOL_GPL(l2tp_nl_register_ops); | |
975 | ||
976 | void l2tp_nl_unregister_ops(enum l2tp_pwtype pw_type) | |
977 | { | |
978 | if (pw_type < __L2TP_PWTYPE_MAX) { | |
979 | genl_lock(); | |
980 | l2tp_nl_cmd_ops[pw_type] = NULL; | |
981 | genl_unlock(); | |
982 | } | |
983 | } | |
984 | EXPORT_SYMBOL_GPL(l2tp_nl_unregister_ops); | |
985 | ||
986 | static int l2tp_nl_init(void) | |
987 | { | |
a4ca44fa | 988 | pr_info("L2TP netlink interface\n"); |
33f72e6f BH |
989 | return genl_register_family_with_ops_groups(&l2tp_nl_family, |
990 | l2tp_nl_ops, | |
991 | l2tp_multicast_group); | |
309795f4 JC |
992 | } |
993 | ||
994 | static void l2tp_nl_cleanup(void) | |
995 | { | |
996 | genl_unregister_family(&l2tp_nl_family); | |
997 | } | |
998 | ||
999 | module_init(l2tp_nl_init); | |
1000 | module_exit(l2tp_nl_cleanup); | |
1001 | ||
1002 | MODULE_AUTHOR("James Chapman <jchapman@katalix.com>"); | |
1003 | MODULE_DESCRIPTION("L2TP netlink"); | |
1004 | MODULE_LICENSE("GPL"); | |
1005 | MODULE_VERSION("1.0"); | |
e9412c37 | 1006 | MODULE_ALIAS_GENL_FAMILY("l2tp"); |