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 | ||
853effc5 MT |
127 | if (ret >= 0) { |
128 | ret = genlmsg_multicast_allns(family, msg, 0, 0, GFP_ATOMIC); | |
129 | /* We don't care if no one is listening */ | |
130 | if (ret == -ESRCH) | |
131 | ret = 0; | |
132 | return ret; | |
133 | } | |
33f72e6f BH |
134 | |
135 | nlmsg_free(msg); | |
136 | ||
137 | return ret; | |
138 | } | |
139 | ||
140 | static int l2tp_session_notify(struct genl_family *family, | |
141 | struct genl_info *info, | |
142 | struct l2tp_session *session, | |
143 | u8 cmd) | |
144 | { | |
145 | struct sk_buff *msg; | |
146 | int ret; | |
147 | ||
148 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
149 | if (!msg) | |
150 | return -ENOMEM; | |
151 | ||
152 | ret = l2tp_nl_session_send(msg, info->snd_portid, info->snd_seq, | |
153 | NLM_F_ACK, session, cmd); | |
154 | ||
853effc5 MT |
155 | if (ret >= 0) { |
156 | ret = genlmsg_multicast_allns(family, msg, 0, 0, GFP_ATOMIC); | |
157 | /* We don't care if no one is listening */ | |
158 | if (ret == -ESRCH) | |
159 | ret = 0; | |
160 | return ret; | |
161 | } | |
33f72e6f BH |
162 | |
163 | nlmsg_free(msg); | |
164 | ||
165 | return ret; | |
166 | } | |
167 | ||
309795f4 JC |
168 | static int l2tp_nl_cmd_tunnel_create(struct sk_buff *skb, struct genl_info *info) |
169 | { | |
170 | u32 tunnel_id; | |
171 | u32 peer_tunnel_id; | |
172 | int proto_version; | |
173 | int fd; | |
174 | int ret = 0; | |
175 | struct l2tp_tunnel_cfg cfg = { 0, }; | |
176 | struct l2tp_tunnel *tunnel; | |
177 | struct net *net = genl_info_net(info); | |
178 | ||
179 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
180 | ret = -EINVAL; | |
181 | goto out; | |
182 | } | |
183 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
184 | ||
185 | if (!info->attrs[L2TP_ATTR_PEER_CONN_ID]) { | |
186 | ret = -EINVAL; | |
187 | goto out; | |
188 | } | |
189 | peer_tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_CONN_ID]); | |
190 | ||
191 | if (!info->attrs[L2TP_ATTR_PROTO_VERSION]) { | |
192 | ret = -EINVAL; | |
193 | goto out; | |
194 | } | |
195 | proto_version = nla_get_u8(info->attrs[L2TP_ATTR_PROTO_VERSION]); | |
196 | ||
197 | if (!info->attrs[L2TP_ATTR_ENCAP_TYPE]) { | |
198 | ret = -EINVAL; | |
199 | goto out; | |
200 | } | |
201 | cfg.encap = nla_get_u16(info->attrs[L2TP_ATTR_ENCAP_TYPE]); | |
202 | ||
789a4a2c JC |
203 | fd = -1; |
204 | if (info->attrs[L2TP_ATTR_FD]) { | |
205 | fd = nla_get_u32(info->attrs[L2TP_ATTR_FD]); | |
206 | } else { | |
f9bac8df CE |
207 | #if IS_ENABLED(CONFIG_IPV6) |
208 | if (info->attrs[L2TP_ATTR_IP6_SADDR] && | |
209 | info->attrs[L2TP_ATTR_IP6_DADDR]) { | |
210 | cfg.local_ip6 = nla_data( | |
211 | info->attrs[L2TP_ATTR_IP6_SADDR]); | |
212 | cfg.peer_ip6 = nla_data( | |
213 | info->attrs[L2TP_ATTR_IP6_DADDR]); | |
214 | } else | |
215 | #endif | |
216 | if (info->attrs[L2TP_ATTR_IP_SADDR] && | |
217 | info->attrs[L2TP_ATTR_IP_DADDR]) { | |
67b61f6c | 218 | cfg.local_ip.s_addr = nla_get_in_addr( |
f9bac8df | 219 | info->attrs[L2TP_ATTR_IP_SADDR]); |
67b61f6c | 220 | cfg.peer_ip.s_addr = nla_get_in_addr( |
f9bac8df CE |
221 | info->attrs[L2TP_ATTR_IP_DADDR]); |
222 | } else { | |
223 | ret = -EINVAL; | |
224 | goto out; | |
225 | } | |
789a4a2c JC |
226 | if (info->attrs[L2TP_ATTR_UDP_SPORT]) |
227 | cfg.local_udp_port = nla_get_u16(info->attrs[L2TP_ATTR_UDP_SPORT]); | |
228 | if (info->attrs[L2TP_ATTR_UDP_DPORT]) | |
229 | cfg.peer_udp_port = nla_get_u16(info->attrs[L2TP_ATTR_UDP_DPORT]); | |
230 | if (info->attrs[L2TP_ATTR_UDP_CSUM]) | |
231 | cfg.use_udp_checksums = nla_get_flag(info->attrs[L2TP_ATTR_UDP_CSUM]); | |
6b649fea TH |
232 | |
233 | #if IS_ENABLED(CONFIG_IPV6) | |
234 | if (info->attrs[L2TP_ATTR_UDP_ZERO_CSUM6_TX]) | |
235 | cfg.udp6_zero_tx_checksums = nla_get_flag(info->attrs[L2TP_ATTR_UDP_ZERO_CSUM6_TX]); | |
236 | if (info->attrs[L2TP_ATTR_UDP_ZERO_CSUM6_RX]) | |
237 | cfg.udp6_zero_rx_checksums = nla_get_flag(info->attrs[L2TP_ATTR_UDP_ZERO_CSUM6_RX]); | |
238 | #endif | |
309795f4 | 239 | } |
309795f4 JC |
240 | |
241 | if (info->attrs[L2TP_ATTR_DEBUG]) | |
242 | cfg.debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); | |
243 | ||
244 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
245 | if (tunnel != NULL) { | |
246 | ret = -EEXIST; | |
247 | goto out; | |
248 | } | |
249 | ||
250 | ret = -EINVAL; | |
251 | switch (cfg.encap) { | |
252 | case L2TP_ENCAPTYPE_UDP: | |
253 | case L2TP_ENCAPTYPE_IP: | |
254 | ret = l2tp_tunnel_create(net, fd, proto_version, tunnel_id, | |
255 | peer_tunnel_id, &cfg, &tunnel); | |
256 | break; | |
257 | } | |
258 | ||
33f72e6f BH |
259 | if (ret >= 0) |
260 | ret = l2tp_tunnel_notify(&l2tp_nl_family, info, | |
261 | tunnel, L2TP_CMD_TUNNEL_CREATE); | |
309795f4 JC |
262 | out: |
263 | return ret; | |
264 | } | |
265 | ||
266 | static int l2tp_nl_cmd_tunnel_delete(struct sk_buff *skb, struct genl_info *info) | |
267 | { | |
268 | struct l2tp_tunnel *tunnel; | |
269 | u32 tunnel_id; | |
270 | int ret = 0; | |
271 | struct net *net = genl_info_net(info); | |
272 | ||
273 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
274 | ret = -EINVAL; | |
275 | goto out; | |
276 | } | |
277 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
278 | ||
279 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
280 | if (tunnel == NULL) { | |
281 | ret = -ENODEV; | |
282 | goto out; | |
283 | } | |
284 | ||
33f72e6f BH |
285 | l2tp_tunnel_notify(&l2tp_nl_family, info, |
286 | tunnel, L2TP_CMD_TUNNEL_DELETE); | |
287 | ||
309795f4 JC |
288 | (void) l2tp_tunnel_delete(tunnel); |
289 | ||
290 | out: | |
291 | return ret; | |
292 | } | |
293 | ||
294 | static int l2tp_nl_cmd_tunnel_modify(struct sk_buff *skb, struct genl_info *info) | |
295 | { | |
296 | struct l2tp_tunnel *tunnel; | |
297 | u32 tunnel_id; | |
298 | int ret = 0; | |
299 | struct net *net = genl_info_net(info); | |
300 | ||
301 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
302 | ret = -EINVAL; | |
303 | goto out; | |
304 | } | |
305 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
306 | ||
307 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
308 | if (tunnel == NULL) { | |
309 | ret = -ENODEV; | |
310 | goto out; | |
311 | } | |
312 | ||
313 | if (info->attrs[L2TP_ATTR_DEBUG]) | |
314 | tunnel->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); | |
315 | ||
33f72e6f BH |
316 | ret = l2tp_tunnel_notify(&l2tp_nl_family, info, |
317 | tunnel, L2TP_CMD_TUNNEL_MODIFY); | |
318 | ||
309795f4 JC |
319 | out: |
320 | return ret; | |
321 | } | |
322 | ||
15e47304 | 323 | static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 portid, u32 seq, int flags, |
33f72e6f | 324 | struct l2tp_tunnel *tunnel, u8 cmd) |
309795f4 JC |
325 | { |
326 | void *hdr; | |
327 | struct nlattr *nest; | |
328 | struct sock *sk = NULL; | |
329 | struct inet_sock *inet; | |
f9bac8df CE |
330 | #if IS_ENABLED(CONFIG_IPV6) |
331 | struct ipv6_pinfo *np = NULL; | |
332 | #endif | |
309795f4 | 333 | |
33f72e6f | 334 | hdr = genlmsg_put(skb, portid, seq, &l2tp_nl_family, flags, cmd); |
7f8436a1 WY |
335 | if (!hdr) |
336 | return -EMSGSIZE; | |
309795f4 | 337 | |
60aed2ab DM |
338 | if (nla_put_u8(skb, L2TP_ATTR_PROTO_VERSION, tunnel->version) || |
339 | nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id) || | |
340 | nla_put_u32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id) || | |
341 | nla_put_u32(skb, L2TP_ATTR_DEBUG, tunnel->debug) || | |
342 | nla_put_u16(skb, L2TP_ATTR_ENCAP_TYPE, tunnel->encap)) | |
343 | goto nla_put_failure; | |
309795f4 JC |
344 | |
345 | nest = nla_nest_start(skb, L2TP_ATTR_STATS); | |
346 | if (nest == NULL) | |
347 | goto nla_put_failure; | |
348 | ||
7b7c0719 TP |
349 | if (nla_put_u64(skb, L2TP_ATTR_TX_PACKETS, |
350 | atomic_long_read(&tunnel->stats.tx_packets)) || | |
351 | nla_put_u64(skb, L2TP_ATTR_TX_BYTES, | |
352 | atomic_long_read(&tunnel->stats.tx_bytes)) || | |
353 | nla_put_u64(skb, L2TP_ATTR_TX_ERRORS, | |
354 | atomic_long_read(&tunnel->stats.tx_errors)) || | |
355 | nla_put_u64(skb, L2TP_ATTR_RX_PACKETS, | |
356 | atomic_long_read(&tunnel->stats.rx_packets)) || | |
357 | nla_put_u64(skb, L2TP_ATTR_RX_BYTES, | |
358 | atomic_long_read(&tunnel->stats.rx_bytes)) || | |
60aed2ab | 359 | nla_put_u64(skb, L2TP_ATTR_RX_SEQ_DISCARDS, |
7b7c0719 | 360 | atomic_long_read(&tunnel->stats.rx_seq_discards)) || |
60aed2ab | 361 | nla_put_u64(skb, L2TP_ATTR_RX_OOS_PACKETS, |
7b7c0719 TP |
362 | atomic_long_read(&tunnel->stats.rx_oos_packets)) || |
363 | nla_put_u64(skb, L2TP_ATTR_RX_ERRORS, | |
364 | atomic_long_read(&tunnel->stats.rx_errors))) | |
60aed2ab | 365 | goto nla_put_failure; |
309795f4 JC |
366 | nla_nest_end(skb, nest); |
367 | ||
368 | sk = tunnel->sock; | |
369 | if (!sk) | |
370 | goto out; | |
371 | ||
f9bac8df CE |
372 | #if IS_ENABLED(CONFIG_IPV6) |
373 | if (sk->sk_family == AF_INET6) | |
374 | np = inet6_sk(sk); | |
375 | #endif | |
376 | ||
309795f4 JC |
377 | inet = inet_sk(sk); |
378 | ||
379 | switch (tunnel->encap) { | |
380 | case L2TP_ENCAPTYPE_UDP: | |
60aed2ab DM |
381 | if (nla_put_u16(skb, L2TP_ATTR_UDP_SPORT, ntohs(inet->inet_sport)) || |
382 | nla_put_u16(skb, L2TP_ATTR_UDP_DPORT, ntohs(inet->inet_dport)) || | |
28448b80 | 383 | nla_put_u8(skb, L2TP_ATTR_UDP_CSUM, !sk->sk_no_check_tx)) |
60aed2ab | 384 | goto nla_put_failure; |
309795f4 JC |
385 | /* NOBREAK */ |
386 | case L2TP_ENCAPTYPE_IP: | |
f9bac8df CE |
387 | #if IS_ENABLED(CONFIG_IPV6) |
388 | if (np) { | |
930345ea JB |
389 | if (nla_put_in6_addr(skb, L2TP_ATTR_IP6_SADDR, |
390 | &np->saddr) || | |
391 | nla_put_in6_addr(skb, L2TP_ATTR_IP6_DADDR, | |
392 | &sk->sk_v6_daddr)) | |
f9bac8df CE |
393 | goto nla_put_failure; |
394 | } else | |
395 | #endif | |
930345ea JB |
396 | if (nla_put_in_addr(skb, L2TP_ATTR_IP_SADDR, |
397 | inet->inet_saddr) || | |
398 | nla_put_in_addr(skb, L2TP_ATTR_IP_DADDR, | |
399 | inet->inet_daddr)) | |
60aed2ab | 400 | goto nla_put_failure; |
309795f4 JC |
401 | break; |
402 | } | |
403 | ||
404 | out: | |
053c095a JB |
405 | genlmsg_end(skb, hdr); |
406 | return 0; | |
309795f4 JC |
407 | |
408 | nla_put_failure: | |
409 | genlmsg_cancel(skb, hdr); | |
410 | return -1; | |
411 | } | |
412 | ||
413 | static int l2tp_nl_cmd_tunnel_get(struct sk_buff *skb, struct genl_info *info) | |
414 | { | |
415 | struct l2tp_tunnel *tunnel; | |
416 | struct sk_buff *msg; | |
417 | u32 tunnel_id; | |
418 | int ret = -ENOBUFS; | |
419 | struct net *net = genl_info_net(info); | |
420 | ||
421 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
422 | ret = -EINVAL; | |
423 | goto out; | |
424 | } | |
425 | ||
426 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
427 | ||
428 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
429 | if (tunnel == NULL) { | |
430 | ret = -ENODEV; | |
431 | goto out; | |
432 | } | |
433 | ||
58050fce | 434 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
309795f4 JC |
435 | if (!msg) { |
436 | ret = -ENOMEM; | |
437 | goto out; | |
438 | } | |
439 | ||
15e47304 | 440 | ret = l2tp_nl_tunnel_send(msg, info->snd_portid, info->snd_seq, |
33f72e6f | 441 | NLM_F_ACK, tunnel, L2TP_CMD_TUNNEL_GET); |
309795f4 JC |
442 | if (ret < 0) |
443 | goto err_out; | |
444 | ||
15e47304 | 445 | return genlmsg_unicast(net, msg, info->snd_portid); |
309795f4 JC |
446 | |
447 | err_out: | |
448 | nlmsg_free(msg); | |
449 | ||
450 | out: | |
451 | return ret; | |
452 | } | |
453 | ||
454 | static int l2tp_nl_cmd_tunnel_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
455 | { | |
456 | int ti = cb->args[0]; | |
457 | struct l2tp_tunnel *tunnel; | |
458 | struct net *net = sock_net(skb->sk); | |
459 | ||
460 | for (;;) { | |
461 | tunnel = l2tp_tunnel_find_nth(net, ti); | |
462 | if (tunnel == NULL) | |
463 | goto out; | |
464 | ||
15e47304 | 465 | if (l2tp_nl_tunnel_send(skb, NETLINK_CB(cb->skb).portid, |
309795f4 | 466 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
053c095a | 467 | tunnel, L2TP_CMD_TUNNEL_GET) < 0) |
309795f4 JC |
468 | goto out; |
469 | ||
470 | ti++; | |
471 | } | |
472 | ||
473 | out: | |
474 | cb->args[0] = ti; | |
475 | ||
476 | return skb->len; | |
477 | } | |
478 | ||
479 | static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *info) | |
480 | { | |
481 | u32 tunnel_id = 0; | |
482 | u32 session_id; | |
483 | u32 peer_session_id; | |
484 | int ret = 0; | |
485 | struct l2tp_tunnel *tunnel; | |
486 | struct l2tp_session *session; | |
487 | struct l2tp_session_cfg cfg = { 0, }; | |
488 | struct net *net = genl_info_net(info); | |
489 | ||
490 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
491 | ret = -EINVAL; | |
492 | goto out; | |
493 | } | |
494 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
495 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
496 | if (!tunnel) { | |
497 | ret = -ENODEV; | |
498 | goto out; | |
499 | } | |
500 | ||
501 | if (!info->attrs[L2TP_ATTR_SESSION_ID]) { | |
502 | ret = -EINVAL; | |
503 | goto out; | |
504 | } | |
505 | session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]); | |
506 | session = l2tp_session_find(net, tunnel, session_id); | |
507 | if (session) { | |
508 | ret = -EEXIST; | |
509 | goto out; | |
510 | } | |
511 | ||
512 | if (!info->attrs[L2TP_ATTR_PEER_SESSION_ID]) { | |
513 | ret = -EINVAL; | |
514 | goto out; | |
515 | } | |
516 | peer_session_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_SESSION_ID]); | |
517 | ||
518 | if (!info->attrs[L2TP_ATTR_PW_TYPE]) { | |
519 | ret = -EINVAL; | |
520 | goto out; | |
521 | } | |
522 | cfg.pw_type = nla_get_u16(info->attrs[L2TP_ATTR_PW_TYPE]); | |
523 | if (cfg.pw_type >= __L2TP_PWTYPE_MAX) { | |
524 | ret = -EINVAL; | |
525 | goto out; | |
526 | } | |
527 | ||
528 | if (tunnel->version > 2) { | |
529 | if (info->attrs[L2TP_ATTR_OFFSET]) | |
530 | cfg.offset = nla_get_u16(info->attrs[L2TP_ATTR_OFFSET]); | |
531 | ||
532 | if (info->attrs[L2TP_ATTR_DATA_SEQ]) | |
533 | cfg.data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]); | |
534 | ||
535 | cfg.l2specific_type = L2TP_L2SPECTYPE_DEFAULT; | |
536 | if (info->attrs[L2TP_ATTR_L2SPEC_TYPE]) | |
537 | cfg.l2specific_type = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_TYPE]); | |
538 | ||
539 | cfg.l2specific_len = 4; | |
540 | if (info->attrs[L2TP_ATTR_L2SPEC_LEN]) | |
541 | cfg.l2specific_len = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_LEN]); | |
542 | ||
543 | if (info->attrs[L2TP_ATTR_COOKIE]) { | |
544 | u16 len = nla_len(info->attrs[L2TP_ATTR_COOKIE]); | |
545 | if (len > 8) { | |
546 | ret = -EINVAL; | |
547 | goto out; | |
548 | } | |
549 | cfg.cookie_len = len; | |
550 | memcpy(&cfg.cookie[0], nla_data(info->attrs[L2TP_ATTR_COOKIE]), len); | |
551 | } | |
552 | if (info->attrs[L2TP_ATTR_PEER_COOKIE]) { | |
553 | u16 len = nla_len(info->attrs[L2TP_ATTR_PEER_COOKIE]); | |
554 | if (len > 8) { | |
555 | ret = -EINVAL; | |
556 | goto out; | |
557 | } | |
558 | cfg.peer_cookie_len = len; | |
559 | memcpy(&cfg.peer_cookie[0], nla_data(info->attrs[L2TP_ATTR_PEER_COOKIE]), len); | |
560 | } | |
561 | if (info->attrs[L2TP_ATTR_IFNAME]) | |
562 | cfg.ifname = nla_data(info->attrs[L2TP_ATTR_IFNAME]); | |
563 | ||
564 | if (info->attrs[L2TP_ATTR_VLAN_ID]) | |
565 | cfg.vlan_id = nla_get_u16(info->attrs[L2TP_ATTR_VLAN_ID]); | |
566 | } | |
567 | ||
568 | if (info->attrs[L2TP_ATTR_DEBUG]) | |
569 | cfg.debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); | |
570 | ||
571 | if (info->attrs[L2TP_ATTR_RECV_SEQ]) | |
572 | cfg.recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]); | |
573 | ||
574 | if (info->attrs[L2TP_ATTR_SEND_SEQ]) | |
575 | cfg.send_seq = nla_get_u8(info->attrs[L2TP_ATTR_SEND_SEQ]); | |
576 | ||
577 | if (info->attrs[L2TP_ATTR_LNS_MODE]) | |
578 | cfg.lns_mode = nla_get_u8(info->attrs[L2TP_ATTR_LNS_MODE]); | |
579 | ||
580 | if (info->attrs[L2TP_ATTR_RECV_TIMEOUT]) | |
581 | cfg.reorder_timeout = nla_get_msecs(info->attrs[L2TP_ATTR_RECV_TIMEOUT]); | |
582 | ||
583 | if (info->attrs[L2TP_ATTR_MTU]) | |
584 | cfg.mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]); | |
585 | ||
586 | if (info->attrs[L2TP_ATTR_MRU]) | |
587 | cfg.mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]); | |
588 | ||
f1f39f91 | 589 | #ifdef CONFIG_MODULES |
590 | if (l2tp_nl_cmd_ops[cfg.pw_type] == NULL) { | |
591 | genl_unlock(); | |
592 | request_module("net-l2tp-type-%u", cfg.pw_type); | |
593 | genl_lock(); | |
594 | } | |
595 | #endif | |
309795f4 JC |
596 | if ((l2tp_nl_cmd_ops[cfg.pw_type] == NULL) || |
597 | (l2tp_nl_cmd_ops[cfg.pw_type]->session_create == NULL)) { | |
598 | ret = -EPROTONOSUPPORT; | |
599 | goto out; | |
600 | } | |
601 | ||
602 | /* Check that pseudowire-specific params are present */ | |
603 | switch (cfg.pw_type) { | |
604 | case L2TP_PWTYPE_NONE: | |
605 | break; | |
606 | case L2TP_PWTYPE_ETH_VLAN: | |
607 | if (!info->attrs[L2TP_ATTR_VLAN_ID]) { | |
608 | ret = -EINVAL; | |
609 | goto out; | |
610 | } | |
611 | break; | |
612 | case L2TP_PWTYPE_ETH: | |
613 | break; | |
614 | case L2TP_PWTYPE_PPP: | |
615 | case L2TP_PWTYPE_PPP_AC: | |
616 | break; | |
617 | case L2TP_PWTYPE_IP: | |
618 | default: | |
619 | ret = -EPROTONOSUPPORT; | |
620 | break; | |
621 | } | |
622 | ||
623 | ret = -EPROTONOSUPPORT; | |
624 | if (l2tp_nl_cmd_ops[cfg.pw_type]->session_create) | |
625 | ret = (*l2tp_nl_cmd_ops[cfg.pw_type]->session_create)(net, tunnel_id, | |
626 | session_id, peer_session_id, &cfg); | |
627 | ||
33f72e6f BH |
628 | if (ret >= 0) { |
629 | session = l2tp_session_find(net, tunnel, session_id); | |
630 | if (session) | |
631 | ret = l2tp_session_notify(&l2tp_nl_family, info, session, | |
632 | L2TP_CMD_SESSION_CREATE); | |
633 | } | |
634 | ||
309795f4 JC |
635 | out: |
636 | return ret; | |
637 | } | |
638 | ||
639 | static int l2tp_nl_cmd_session_delete(struct sk_buff *skb, struct genl_info *info) | |
640 | { | |
641 | int ret = 0; | |
642 | struct l2tp_session *session; | |
643 | u16 pw_type; | |
644 | ||
645 | session = l2tp_nl_session_find(info); | |
646 | if (session == NULL) { | |
647 | ret = -ENODEV; | |
648 | goto out; | |
649 | } | |
650 | ||
33f72e6f BH |
651 | l2tp_session_notify(&l2tp_nl_family, info, |
652 | session, L2TP_CMD_SESSION_DELETE); | |
653 | ||
309795f4 JC |
654 | pw_type = session->pwtype; |
655 | if (pw_type < __L2TP_PWTYPE_MAX) | |
656 | if (l2tp_nl_cmd_ops[pw_type] && l2tp_nl_cmd_ops[pw_type]->session_delete) | |
657 | ret = (*l2tp_nl_cmd_ops[pw_type]->session_delete)(session); | |
658 | ||
659 | out: | |
660 | return ret; | |
661 | } | |
662 | ||
663 | static int l2tp_nl_cmd_session_modify(struct sk_buff *skb, struct genl_info *info) | |
664 | { | |
665 | int ret = 0; | |
666 | struct l2tp_session *session; | |
667 | ||
668 | session = l2tp_nl_session_find(info); | |
669 | if (session == NULL) { | |
670 | ret = -ENODEV; | |
671 | goto out; | |
672 | } | |
673 | ||
674 | if (info->attrs[L2TP_ATTR_DEBUG]) | |
675 | session->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); | |
676 | ||
677 | if (info->attrs[L2TP_ATTR_DATA_SEQ]) | |
678 | session->data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]); | |
679 | ||
680 | if (info->attrs[L2TP_ATTR_RECV_SEQ]) | |
681 | session->recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]); | |
682 | ||
bb5016ea | 683 | if (info->attrs[L2TP_ATTR_SEND_SEQ]) { |
309795f4 | 684 | session->send_seq = nla_get_u8(info->attrs[L2TP_ATTR_SEND_SEQ]); |
bb5016ea GN |
685 | l2tp_session_set_header_len(session, session->tunnel->version); |
686 | } | |
309795f4 JC |
687 | |
688 | if (info->attrs[L2TP_ATTR_LNS_MODE]) | |
689 | session->lns_mode = nla_get_u8(info->attrs[L2TP_ATTR_LNS_MODE]); | |
690 | ||
691 | if (info->attrs[L2TP_ATTR_RECV_TIMEOUT]) | |
692 | session->reorder_timeout = nla_get_msecs(info->attrs[L2TP_ATTR_RECV_TIMEOUT]); | |
693 | ||
694 | if (info->attrs[L2TP_ATTR_MTU]) | |
695 | session->mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]); | |
696 | ||
697 | if (info->attrs[L2TP_ATTR_MRU]) | |
698 | session->mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]); | |
699 | ||
33f72e6f BH |
700 | ret = l2tp_session_notify(&l2tp_nl_family, info, |
701 | session, L2TP_CMD_SESSION_MODIFY); | |
702 | ||
309795f4 JC |
703 | out: |
704 | return ret; | |
705 | } | |
706 | ||
15e47304 | 707 | static int l2tp_nl_session_send(struct sk_buff *skb, u32 portid, u32 seq, int flags, |
33f72e6f | 708 | struct l2tp_session *session, u8 cmd) |
309795f4 JC |
709 | { |
710 | void *hdr; | |
711 | struct nlattr *nest; | |
712 | struct l2tp_tunnel *tunnel = session->tunnel; | |
713 | struct sock *sk = NULL; | |
714 | ||
715 | sk = tunnel->sock; | |
716 | ||
33f72e6f | 717 | hdr = genlmsg_put(skb, portid, seq, &l2tp_nl_family, flags, cmd); |
7f8436a1 WY |
718 | if (!hdr) |
719 | return -EMSGSIZE; | |
309795f4 | 720 | |
60aed2ab DM |
721 | if (nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id) || |
722 | nla_put_u32(skb, L2TP_ATTR_SESSION_ID, session->session_id) || | |
723 | nla_put_u32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id) || | |
724 | nla_put_u32(skb, L2TP_ATTR_PEER_SESSION_ID, | |
725 | session->peer_session_id) || | |
726 | nla_put_u32(skb, L2TP_ATTR_DEBUG, session->debug) || | |
727 | nla_put_u16(skb, L2TP_ATTR_PW_TYPE, session->pwtype) || | |
728 | nla_put_u16(skb, L2TP_ATTR_MTU, session->mtu) || | |
729 | (session->mru && | |
730 | nla_put_u16(skb, L2TP_ATTR_MRU, session->mru))) | |
731 | goto nla_put_failure; | |
732 | ||
e269ed26 | 733 | if ((session->ifname[0] && |
60aed2ab DM |
734 | nla_put_string(skb, L2TP_ATTR_IFNAME, session->ifname)) || |
735 | (session->cookie_len && | |
736 | nla_put(skb, L2TP_ATTR_COOKIE, session->cookie_len, | |
737 | &session->cookie[0])) || | |
738 | (session->peer_cookie_len && | |
739 | nla_put(skb, L2TP_ATTR_PEER_COOKIE, session->peer_cookie_len, | |
740 | &session->peer_cookie[0])) || | |
741 | nla_put_u8(skb, L2TP_ATTR_RECV_SEQ, session->recv_seq) || | |
742 | nla_put_u8(skb, L2TP_ATTR_SEND_SEQ, session->send_seq) || | |
743 | nla_put_u8(skb, L2TP_ATTR_LNS_MODE, session->lns_mode) || | |
309795f4 | 744 | #ifdef CONFIG_XFRM |
60aed2ab DM |
745 | (((sk) && (sk->sk_policy[0] || sk->sk_policy[1])) && |
746 | nla_put_u8(skb, L2TP_ATTR_USING_IPSEC, 1)) || | |
309795f4 | 747 | #endif |
60aed2ab DM |
748 | (session->reorder_timeout && |
749 | nla_put_msecs(skb, L2TP_ATTR_RECV_TIMEOUT, session->reorder_timeout))) | |
750 | goto nla_put_failure; | |
5de7aee5 | 751 | |
309795f4 JC |
752 | nest = nla_nest_start(skb, L2TP_ATTR_STATS); |
753 | if (nest == NULL) | |
754 | goto nla_put_failure; | |
5de7aee5 | 755 | |
7b7c0719 TP |
756 | if (nla_put_u64(skb, L2TP_ATTR_TX_PACKETS, |
757 | atomic_long_read(&session->stats.tx_packets)) || | |
758 | nla_put_u64(skb, L2TP_ATTR_TX_BYTES, | |
759 | atomic_long_read(&session->stats.tx_bytes)) || | |
760 | nla_put_u64(skb, L2TP_ATTR_TX_ERRORS, | |
761 | atomic_long_read(&session->stats.tx_errors)) || | |
762 | nla_put_u64(skb, L2TP_ATTR_RX_PACKETS, | |
763 | atomic_long_read(&session->stats.rx_packets)) || | |
764 | nla_put_u64(skb, L2TP_ATTR_RX_BYTES, | |
765 | atomic_long_read(&session->stats.rx_bytes)) || | |
60aed2ab | 766 | nla_put_u64(skb, L2TP_ATTR_RX_SEQ_DISCARDS, |
7b7c0719 | 767 | atomic_long_read(&session->stats.rx_seq_discards)) || |
60aed2ab | 768 | nla_put_u64(skb, L2TP_ATTR_RX_OOS_PACKETS, |
7b7c0719 TP |
769 | atomic_long_read(&session->stats.rx_oos_packets)) || |
770 | nla_put_u64(skb, L2TP_ATTR_RX_ERRORS, | |
771 | atomic_long_read(&session->stats.rx_errors))) | |
60aed2ab | 772 | goto nla_put_failure; |
309795f4 JC |
773 | nla_nest_end(skb, nest); |
774 | ||
053c095a JB |
775 | genlmsg_end(skb, hdr); |
776 | return 0; | |
309795f4 JC |
777 | |
778 | nla_put_failure: | |
779 | genlmsg_cancel(skb, hdr); | |
780 | return -1; | |
781 | } | |
782 | ||
783 | static int l2tp_nl_cmd_session_get(struct sk_buff *skb, struct genl_info *info) | |
784 | { | |
785 | struct l2tp_session *session; | |
786 | struct sk_buff *msg; | |
787 | int ret; | |
788 | ||
789 | session = l2tp_nl_session_find(info); | |
790 | if (session == NULL) { | |
791 | ret = -ENODEV; | |
792 | goto out; | |
793 | } | |
794 | ||
58050fce | 795 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
309795f4 JC |
796 | if (!msg) { |
797 | ret = -ENOMEM; | |
798 | goto out; | |
799 | } | |
800 | ||
15e47304 | 801 | ret = l2tp_nl_session_send(msg, info->snd_portid, info->snd_seq, |
33f72e6f | 802 | 0, session, L2TP_CMD_SESSION_GET); |
309795f4 JC |
803 | if (ret < 0) |
804 | goto err_out; | |
805 | ||
15e47304 | 806 | return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid); |
309795f4 JC |
807 | |
808 | err_out: | |
809 | nlmsg_free(msg); | |
810 | ||
811 | out: | |
812 | return ret; | |
813 | } | |
814 | ||
815 | static int l2tp_nl_cmd_session_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
816 | { | |
817 | struct net *net = sock_net(skb->sk); | |
818 | struct l2tp_session *session; | |
819 | struct l2tp_tunnel *tunnel = NULL; | |
820 | int ti = cb->args[0]; | |
821 | int si = cb->args[1]; | |
822 | ||
823 | for (;;) { | |
824 | if (tunnel == NULL) { | |
825 | tunnel = l2tp_tunnel_find_nth(net, ti); | |
826 | if (tunnel == NULL) | |
827 | goto out; | |
828 | } | |
829 | ||
830 | session = l2tp_session_find_nth(tunnel, si); | |
831 | if (session == NULL) { | |
832 | ti++; | |
833 | tunnel = NULL; | |
834 | si = 0; | |
835 | continue; | |
836 | } | |
837 | ||
15e47304 | 838 | if (l2tp_nl_session_send(skb, NETLINK_CB(cb->skb).portid, |
309795f4 | 839 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
053c095a | 840 | session, L2TP_CMD_SESSION_GET) < 0) |
309795f4 JC |
841 | break; |
842 | ||
843 | si++; | |
844 | } | |
845 | ||
846 | out: | |
847 | cb->args[0] = ti; | |
848 | cb->args[1] = si; | |
849 | ||
850 | return skb->len; | |
851 | } | |
852 | ||
853 | static struct nla_policy l2tp_nl_policy[L2TP_ATTR_MAX + 1] = { | |
854 | [L2TP_ATTR_NONE] = { .type = NLA_UNSPEC, }, | |
855 | [L2TP_ATTR_PW_TYPE] = { .type = NLA_U16, }, | |
856 | [L2TP_ATTR_ENCAP_TYPE] = { .type = NLA_U16, }, | |
857 | [L2TP_ATTR_OFFSET] = { .type = NLA_U16, }, | |
858 | [L2TP_ATTR_DATA_SEQ] = { .type = NLA_U8, }, | |
859 | [L2TP_ATTR_L2SPEC_TYPE] = { .type = NLA_U8, }, | |
860 | [L2TP_ATTR_L2SPEC_LEN] = { .type = NLA_U8, }, | |
861 | [L2TP_ATTR_PROTO_VERSION] = { .type = NLA_U8, }, | |
862 | [L2TP_ATTR_CONN_ID] = { .type = NLA_U32, }, | |
863 | [L2TP_ATTR_PEER_CONN_ID] = { .type = NLA_U32, }, | |
864 | [L2TP_ATTR_SESSION_ID] = { .type = NLA_U32, }, | |
865 | [L2TP_ATTR_PEER_SESSION_ID] = { .type = NLA_U32, }, | |
866 | [L2TP_ATTR_UDP_CSUM] = { .type = NLA_U8, }, | |
867 | [L2TP_ATTR_VLAN_ID] = { .type = NLA_U16, }, | |
868 | [L2TP_ATTR_DEBUG] = { .type = NLA_U32, }, | |
869 | [L2TP_ATTR_RECV_SEQ] = { .type = NLA_U8, }, | |
870 | [L2TP_ATTR_SEND_SEQ] = { .type = NLA_U8, }, | |
871 | [L2TP_ATTR_LNS_MODE] = { .type = NLA_U8, }, | |
872 | [L2TP_ATTR_USING_IPSEC] = { .type = NLA_U8, }, | |
873 | [L2TP_ATTR_RECV_TIMEOUT] = { .type = NLA_MSECS, }, | |
874 | [L2TP_ATTR_FD] = { .type = NLA_U32, }, | |
875 | [L2TP_ATTR_IP_SADDR] = { .type = NLA_U32, }, | |
876 | [L2TP_ATTR_IP_DADDR] = { .type = NLA_U32, }, | |
877 | [L2TP_ATTR_UDP_SPORT] = { .type = NLA_U16, }, | |
878 | [L2TP_ATTR_UDP_DPORT] = { .type = NLA_U16, }, | |
879 | [L2TP_ATTR_MTU] = { .type = NLA_U16, }, | |
880 | [L2TP_ATTR_MRU] = { .type = NLA_U16, }, | |
881 | [L2TP_ATTR_STATS] = { .type = NLA_NESTED, }, | |
f9bac8df CE |
882 | [L2TP_ATTR_IP6_SADDR] = { |
883 | .type = NLA_BINARY, | |
884 | .len = sizeof(struct in6_addr), | |
885 | }, | |
886 | [L2TP_ATTR_IP6_DADDR] = { | |
887 | .type = NLA_BINARY, | |
888 | .len = sizeof(struct in6_addr), | |
889 | }, | |
309795f4 JC |
890 | [L2TP_ATTR_IFNAME] = { |
891 | .type = NLA_NUL_STRING, | |
892 | .len = IFNAMSIZ - 1, | |
893 | }, | |
894 | [L2TP_ATTR_COOKIE] = { | |
895 | .type = NLA_BINARY, | |
896 | .len = 8, | |
897 | }, | |
898 | [L2TP_ATTR_PEER_COOKIE] = { | |
899 | .type = NLA_BINARY, | |
900 | .len = 8, | |
901 | }, | |
902 | }; | |
903 | ||
4534de83 | 904 | static const struct genl_ops l2tp_nl_ops[] = { |
309795f4 JC |
905 | { |
906 | .cmd = L2TP_CMD_NOOP, | |
907 | .doit = l2tp_nl_cmd_noop, | |
908 | .policy = l2tp_nl_policy, | |
909 | /* can be retrieved by unprivileged users */ | |
910 | }, | |
911 | { | |
912 | .cmd = L2TP_CMD_TUNNEL_CREATE, | |
913 | .doit = l2tp_nl_cmd_tunnel_create, | |
914 | .policy = l2tp_nl_policy, | |
915 | .flags = GENL_ADMIN_PERM, | |
916 | }, | |
917 | { | |
918 | .cmd = L2TP_CMD_TUNNEL_DELETE, | |
919 | .doit = l2tp_nl_cmd_tunnel_delete, | |
920 | .policy = l2tp_nl_policy, | |
921 | .flags = GENL_ADMIN_PERM, | |
922 | }, | |
923 | { | |
924 | .cmd = L2TP_CMD_TUNNEL_MODIFY, | |
925 | .doit = l2tp_nl_cmd_tunnel_modify, | |
926 | .policy = l2tp_nl_policy, | |
927 | .flags = GENL_ADMIN_PERM, | |
928 | }, | |
929 | { | |
930 | .cmd = L2TP_CMD_TUNNEL_GET, | |
931 | .doit = l2tp_nl_cmd_tunnel_get, | |
932 | .dumpit = l2tp_nl_cmd_tunnel_dump, | |
933 | .policy = l2tp_nl_policy, | |
934 | .flags = GENL_ADMIN_PERM, | |
935 | }, | |
936 | { | |
937 | .cmd = L2TP_CMD_SESSION_CREATE, | |
938 | .doit = l2tp_nl_cmd_session_create, | |
939 | .policy = l2tp_nl_policy, | |
940 | .flags = GENL_ADMIN_PERM, | |
941 | }, | |
942 | { | |
943 | .cmd = L2TP_CMD_SESSION_DELETE, | |
944 | .doit = l2tp_nl_cmd_session_delete, | |
945 | .policy = l2tp_nl_policy, | |
946 | .flags = GENL_ADMIN_PERM, | |
947 | }, | |
948 | { | |
949 | .cmd = L2TP_CMD_SESSION_MODIFY, | |
950 | .doit = l2tp_nl_cmd_session_modify, | |
951 | .policy = l2tp_nl_policy, | |
952 | .flags = GENL_ADMIN_PERM, | |
953 | }, | |
954 | { | |
955 | .cmd = L2TP_CMD_SESSION_GET, | |
956 | .doit = l2tp_nl_cmd_session_get, | |
957 | .dumpit = l2tp_nl_cmd_session_dump, | |
958 | .policy = l2tp_nl_policy, | |
959 | .flags = GENL_ADMIN_PERM, | |
960 | }, | |
961 | }; | |
962 | ||
963 | int l2tp_nl_register_ops(enum l2tp_pwtype pw_type, const struct l2tp_nl_cmd_ops *ops) | |
964 | { | |
965 | int ret; | |
966 | ||
967 | ret = -EINVAL; | |
968 | if (pw_type >= __L2TP_PWTYPE_MAX) | |
969 | goto err; | |
970 | ||
971 | genl_lock(); | |
972 | ret = -EBUSY; | |
973 | if (l2tp_nl_cmd_ops[pw_type]) | |
974 | goto out; | |
975 | ||
976 | l2tp_nl_cmd_ops[pw_type] = ops; | |
8cb49014 | 977 | ret = 0; |
309795f4 JC |
978 | |
979 | out: | |
980 | genl_unlock(); | |
981 | err: | |
8cb49014 | 982 | return ret; |
309795f4 JC |
983 | } |
984 | EXPORT_SYMBOL_GPL(l2tp_nl_register_ops); | |
985 | ||
986 | void l2tp_nl_unregister_ops(enum l2tp_pwtype pw_type) | |
987 | { | |
988 | if (pw_type < __L2TP_PWTYPE_MAX) { | |
989 | genl_lock(); | |
990 | l2tp_nl_cmd_ops[pw_type] = NULL; | |
991 | genl_unlock(); | |
992 | } | |
993 | } | |
994 | EXPORT_SYMBOL_GPL(l2tp_nl_unregister_ops); | |
995 | ||
996 | static int l2tp_nl_init(void) | |
997 | { | |
a4ca44fa | 998 | pr_info("L2TP netlink interface\n"); |
33f72e6f BH |
999 | return genl_register_family_with_ops_groups(&l2tp_nl_family, |
1000 | l2tp_nl_ops, | |
1001 | l2tp_multicast_group); | |
309795f4 JC |
1002 | } |
1003 | ||
1004 | static void l2tp_nl_cleanup(void) | |
1005 | { | |
1006 | genl_unregister_family(&l2tp_nl_family); | |
1007 | } | |
1008 | ||
1009 | module_init(l2tp_nl_init); | |
1010 | module_exit(l2tp_nl_cleanup); | |
1011 | ||
1012 | MODULE_AUTHOR("James Chapman <jchapman@katalix.com>"); | |
1013 | MODULE_DESCRIPTION("L2TP netlink"); | |
1014 | MODULE_LICENSE("GPL"); | |
1015 | MODULE_VERSION("1.0"); | |
e9412c37 | 1016 | MODULE_ALIAS_GENL_FAMILY("l2tp"); |