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 | ||
1c714a92 ND |
349 | if (nla_put_u64_64bit(skb, L2TP_ATTR_TX_PACKETS, |
350 | atomic_long_read(&tunnel->stats.tx_packets), | |
351 | L2TP_ATTR_STATS_PAD) || | |
352 | nla_put_u64_64bit(skb, L2TP_ATTR_TX_BYTES, | |
353 | atomic_long_read(&tunnel->stats.tx_bytes), | |
354 | L2TP_ATTR_STATS_PAD) || | |
355 | nla_put_u64_64bit(skb, L2TP_ATTR_TX_ERRORS, | |
356 | atomic_long_read(&tunnel->stats.tx_errors), | |
357 | L2TP_ATTR_STATS_PAD) || | |
358 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_PACKETS, | |
359 | atomic_long_read(&tunnel->stats.rx_packets), | |
360 | L2TP_ATTR_STATS_PAD) || | |
361 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_BYTES, | |
362 | atomic_long_read(&tunnel->stats.rx_bytes), | |
363 | L2TP_ATTR_STATS_PAD) || | |
364 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_SEQ_DISCARDS, | |
365 | atomic_long_read(&tunnel->stats.rx_seq_discards), | |
366 | L2TP_ATTR_STATS_PAD) || | |
367 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_OOS_PACKETS, | |
368 | atomic_long_read(&tunnel->stats.rx_oos_packets), | |
369 | L2TP_ATTR_STATS_PAD) || | |
370 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_ERRORS, | |
371 | atomic_long_read(&tunnel->stats.rx_errors), | |
372 | L2TP_ATTR_STATS_PAD)) | |
60aed2ab | 373 | goto nla_put_failure; |
309795f4 JC |
374 | nla_nest_end(skb, nest); |
375 | ||
376 | sk = tunnel->sock; | |
377 | if (!sk) | |
378 | goto out; | |
379 | ||
f9bac8df CE |
380 | #if IS_ENABLED(CONFIG_IPV6) |
381 | if (sk->sk_family == AF_INET6) | |
382 | np = inet6_sk(sk); | |
383 | #endif | |
384 | ||
309795f4 JC |
385 | inet = inet_sk(sk); |
386 | ||
387 | switch (tunnel->encap) { | |
388 | case L2TP_ENCAPTYPE_UDP: | |
60aed2ab DM |
389 | if (nla_put_u16(skb, L2TP_ATTR_UDP_SPORT, ntohs(inet->inet_sport)) || |
390 | nla_put_u16(skb, L2TP_ATTR_UDP_DPORT, ntohs(inet->inet_dport)) || | |
28448b80 | 391 | nla_put_u8(skb, L2TP_ATTR_UDP_CSUM, !sk->sk_no_check_tx)) |
60aed2ab | 392 | goto nla_put_failure; |
309795f4 JC |
393 | /* NOBREAK */ |
394 | case L2TP_ENCAPTYPE_IP: | |
f9bac8df CE |
395 | #if IS_ENABLED(CONFIG_IPV6) |
396 | if (np) { | |
930345ea JB |
397 | if (nla_put_in6_addr(skb, L2TP_ATTR_IP6_SADDR, |
398 | &np->saddr) || | |
399 | nla_put_in6_addr(skb, L2TP_ATTR_IP6_DADDR, | |
400 | &sk->sk_v6_daddr)) | |
f9bac8df CE |
401 | goto nla_put_failure; |
402 | } else | |
403 | #endif | |
930345ea JB |
404 | if (nla_put_in_addr(skb, L2TP_ATTR_IP_SADDR, |
405 | inet->inet_saddr) || | |
406 | nla_put_in_addr(skb, L2TP_ATTR_IP_DADDR, | |
407 | inet->inet_daddr)) | |
60aed2ab | 408 | goto nla_put_failure; |
309795f4 JC |
409 | break; |
410 | } | |
411 | ||
412 | out: | |
053c095a JB |
413 | genlmsg_end(skb, hdr); |
414 | return 0; | |
309795f4 JC |
415 | |
416 | nla_put_failure: | |
417 | genlmsg_cancel(skb, hdr); | |
418 | return -1; | |
419 | } | |
420 | ||
421 | static int l2tp_nl_cmd_tunnel_get(struct sk_buff *skb, struct genl_info *info) | |
422 | { | |
423 | struct l2tp_tunnel *tunnel; | |
424 | struct sk_buff *msg; | |
425 | u32 tunnel_id; | |
426 | int ret = -ENOBUFS; | |
427 | struct net *net = genl_info_net(info); | |
428 | ||
429 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
430 | ret = -EINVAL; | |
431 | goto out; | |
432 | } | |
433 | ||
434 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
435 | ||
436 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
437 | if (tunnel == NULL) { | |
438 | ret = -ENODEV; | |
439 | goto out; | |
440 | } | |
441 | ||
58050fce | 442 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
309795f4 JC |
443 | if (!msg) { |
444 | ret = -ENOMEM; | |
445 | goto out; | |
446 | } | |
447 | ||
15e47304 | 448 | ret = l2tp_nl_tunnel_send(msg, info->snd_portid, info->snd_seq, |
33f72e6f | 449 | NLM_F_ACK, tunnel, L2TP_CMD_TUNNEL_GET); |
309795f4 JC |
450 | if (ret < 0) |
451 | goto err_out; | |
452 | ||
15e47304 | 453 | return genlmsg_unicast(net, msg, info->snd_portid); |
309795f4 JC |
454 | |
455 | err_out: | |
456 | nlmsg_free(msg); | |
457 | ||
458 | out: | |
459 | return ret; | |
460 | } | |
461 | ||
462 | static int l2tp_nl_cmd_tunnel_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
463 | { | |
464 | int ti = cb->args[0]; | |
465 | struct l2tp_tunnel *tunnel; | |
466 | struct net *net = sock_net(skb->sk); | |
467 | ||
468 | for (;;) { | |
469 | tunnel = l2tp_tunnel_find_nth(net, ti); | |
470 | if (tunnel == NULL) | |
471 | goto out; | |
472 | ||
15e47304 | 473 | if (l2tp_nl_tunnel_send(skb, NETLINK_CB(cb->skb).portid, |
309795f4 | 474 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
053c095a | 475 | tunnel, L2TP_CMD_TUNNEL_GET) < 0) |
309795f4 JC |
476 | goto out; |
477 | ||
478 | ti++; | |
479 | } | |
480 | ||
481 | out: | |
482 | cb->args[0] = ti; | |
483 | ||
484 | return skb->len; | |
485 | } | |
486 | ||
487 | static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *info) | |
488 | { | |
489 | u32 tunnel_id = 0; | |
490 | u32 session_id; | |
491 | u32 peer_session_id; | |
492 | int ret = 0; | |
493 | struct l2tp_tunnel *tunnel; | |
494 | struct l2tp_session *session; | |
495 | struct l2tp_session_cfg cfg = { 0, }; | |
496 | struct net *net = genl_info_net(info); | |
497 | ||
498 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { | |
499 | ret = -EINVAL; | |
500 | goto out; | |
501 | } | |
502 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); | |
503 | tunnel = l2tp_tunnel_find(net, tunnel_id); | |
504 | if (!tunnel) { | |
505 | ret = -ENODEV; | |
506 | goto out; | |
507 | } | |
508 | ||
509 | if (!info->attrs[L2TP_ATTR_SESSION_ID]) { | |
510 | ret = -EINVAL; | |
511 | goto out; | |
512 | } | |
513 | session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]); | |
514 | session = l2tp_session_find(net, tunnel, session_id); | |
515 | if (session) { | |
516 | ret = -EEXIST; | |
517 | goto out; | |
518 | } | |
519 | ||
520 | if (!info->attrs[L2TP_ATTR_PEER_SESSION_ID]) { | |
521 | ret = -EINVAL; | |
522 | goto out; | |
523 | } | |
524 | peer_session_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_SESSION_ID]); | |
525 | ||
526 | if (!info->attrs[L2TP_ATTR_PW_TYPE]) { | |
527 | ret = -EINVAL; | |
528 | goto out; | |
529 | } | |
530 | cfg.pw_type = nla_get_u16(info->attrs[L2TP_ATTR_PW_TYPE]); | |
531 | if (cfg.pw_type >= __L2TP_PWTYPE_MAX) { | |
532 | ret = -EINVAL; | |
533 | goto out; | |
534 | } | |
535 | ||
536 | if (tunnel->version > 2) { | |
537 | if (info->attrs[L2TP_ATTR_OFFSET]) | |
538 | cfg.offset = nla_get_u16(info->attrs[L2TP_ATTR_OFFSET]); | |
539 | ||
540 | if (info->attrs[L2TP_ATTR_DATA_SEQ]) | |
541 | cfg.data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]); | |
542 | ||
543 | cfg.l2specific_type = L2TP_L2SPECTYPE_DEFAULT; | |
544 | if (info->attrs[L2TP_ATTR_L2SPEC_TYPE]) | |
545 | cfg.l2specific_type = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_TYPE]); | |
546 | ||
547 | cfg.l2specific_len = 4; | |
548 | if (info->attrs[L2TP_ATTR_L2SPEC_LEN]) | |
549 | cfg.l2specific_len = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_LEN]); | |
550 | ||
551 | if (info->attrs[L2TP_ATTR_COOKIE]) { | |
552 | u16 len = nla_len(info->attrs[L2TP_ATTR_COOKIE]); | |
553 | if (len > 8) { | |
554 | ret = -EINVAL; | |
555 | goto out; | |
556 | } | |
557 | cfg.cookie_len = len; | |
558 | memcpy(&cfg.cookie[0], nla_data(info->attrs[L2TP_ATTR_COOKIE]), len); | |
559 | } | |
560 | if (info->attrs[L2TP_ATTR_PEER_COOKIE]) { | |
561 | u16 len = nla_len(info->attrs[L2TP_ATTR_PEER_COOKIE]); | |
562 | if (len > 8) { | |
563 | ret = -EINVAL; | |
564 | goto out; | |
565 | } | |
566 | cfg.peer_cookie_len = len; | |
567 | memcpy(&cfg.peer_cookie[0], nla_data(info->attrs[L2TP_ATTR_PEER_COOKIE]), len); | |
568 | } | |
569 | if (info->attrs[L2TP_ATTR_IFNAME]) | |
570 | cfg.ifname = nla_data(info->attrs[L2TP_ATTR_IFNAME]); | |
571 | ||
572 | if (info->attrs[L2TP_ATTR_VLAN_ID]) | |
573 | cfg.vlan_id = nla_get_u16(info->attrs[L2TP_ATTR_VLAN_ID]); | |
574 | } | |
575 | ||
576 | if (info->attrs[L2TP_ATTR_DEBUG]) | |
577 | cfg.debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); | |
578 | ||
579 | if (info->attrs[L2TP_ATTR_RECV_SEQ]) | |
580 | cfg.recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]); | |
581 | ||
582 | if (info->attrs[L2TP_ATTR_SEND_SEQ]) | |
583 | cfg.send_seq = nla_get_u8(info->attrs[L2TP_ATTR_SEND_SEQ]); | |
584 | ||
585 | if (info->attrs[L2TP_ATTR_LNS_MODE]) | |
586 | cfg.lns_mode = nla_get_u8(info->attrs[L2TP_ATTR_LNS_MODE]); | |
587 | ||
588 | if (info->attrs[L2TP_ATTR_RECV_TIMEOUT]) | |
589 | cfg.reorder_timeout = nla_get_msecs(info->attrs[L2TP_ATTR_RECV_TIMEOUT]); | |
590 | ||
591 | if (info->attrs[L2TP_ATTR_MTU]) | |
592 | cfg.mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]); | |
593 | ||
594 | if (info->attrs[L2TP_ATTR_MRU]) | |
595 | cfg.mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]); | |
596 | ||
f1f39f91 | 597 | #ifdef CONFIG_MODULES |
598 | if (l2tp_nl_cmd_ops[cfg.pw_type] == NULL) { | |
599 | genl_unlock(); | |
600 | request_module("net-l2tp-type-%u", cfg.pw_type); | |
601 | genl_lock(); | |
602 | } | |
603 | #endif | |
309795f4 JC |
604 | if ((l2tp_nl_cmd_ops[cfg.pw_type] == NULL) || |
605 | (l2tp_nl_cmd_ops[cfg.pw_type]->session_create == NULL)) { | |
606 | ret = -EPROTONOSUPPORT; | |
607 | goto out; | |
608 | } | |
609 | ||
610 | /* Check that pseudowire-specific params are present */ | |
611 | switch (cfg.pw_type) { | |
612 | case L2TP_PWTYPE_NONE: | |
613 | break; | |
614 | case L2TP_PWTYPE_ETH_VLAN: | |
615 | if (!info->attrs[L2TP_ATTR_VLAN_ID]) { | |
616 | ret = -EINVAL; | |
617 | goto out; | |
618 | } | |
619 | break; | |
620 | case L2TP_PWTYPE_ETH: | |
621 | break; | |
622 | case L2TP_PWTYPE_PPP: | |
623 | case L2TP_PWTYPE_PPP_AC: | |
624 | break; | |
625 | case L2TP_PWTYPE_IP: | |
626 | default: | |
627 | ret = -EPROTONOSUPPORT; | |
628 | break; | |
629 | } | |
630 | ||
631 | ret = -EPROTONOSUPPORT; | |
632 | if (l2tp_nl_cmd_ops[cfg.pw_type]->session_create) | |
633 | ret = (*l2tp_nl_cmd_ops[cfg.pw_type]->session_create)(net, tunnel_id, | |
634 | session_id, peer_session_id, &cfg); | |
635 | ||
33f72e6f BH |
636 | if (ret >= 0) { |
637 | session = l2tp_session_find(net, tunnel, session_id); | |
638 | if (session) | |
639 | ret = l2tp_session_notify(&l2tp_nl_family, info, session, | |
640 | L2TP_CMD_SESSION_CREATE); | |
641 | } | |
642 | ||
309795f4 JC |
643 | out: |
644 | return ret; | |
645 | } | |
646 | ||
647 | static int l2tp_nl_cmd_session_delete(struct sk_buff *skb, struct genl_info *info) | |
648 | { | |
649 | int ret = 0; | |
650 | struct l2tp_session *session; | |
651 | u16 pw_type; | |
652 | ||
653 | session = l2tp_nl_session_find(info); | |
654 | if (session == NULL) { | |
655 | ret = -ENODEV; | |
656 | goto out; | |
657 | } | |
658 | ||
33f72e6f BH |
659 | l2tp_session_notify(&l2tp_nl_family, info, |
660 | session, L2TP_CMD_SESSION_DELETE); | |
661 | ||
309795f4 JC |
662 | pw_type = session->pwtype; |
663 | if (pw_type < __L2TP_PWTYPE_MAX) | |
664 | if (l2tp_nl_cmd_ops[pw_type] && l2tp_nl_cmd_ops[pw_type]->session_delete) | |
665 | ret = (*l2tp_nl_cmd_ops[pw_type]->session_delete)(session); | |
666 | ||
667 | out: | |
668 | return ret; | |
669 | } | |
670 | ||
671 | static int l2tp_nl_cmd_session_modify(struct sk_buff *skb, struct genl_info *info) | |
672 | { | |
673 | int ret = 0; | |
674 | struct l2tp_session *session; | |
675 | ||
676 | session = l2tp_nl_session_find(info); | |
677 | if (session == NULL) { | |
678 | ret = -ENODEV; | |
679 | goto out; | |
680 | } | |
681 | ||
682 | if (info->attrs[L2TP_ATTR_DEBUG]) | |
683 | session->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); | |
684 | ||
685 | if (info->attrs[L2TP_ATTR_DATA_SEQ]) | |
686 | session->data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]); | |
687 | ||
688 | if (info->attrs[L2TP_ATTR_RECV_SEQ]) | |
689 | session->recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]); | |
690 | ||
bb5016ea | 691 | if (info->attrs[L2TP_ATTR_SEND_SEQ]) { |
309795f4 | 692 | session->send_seq = nla_get_u8(info->attrs[L2TP_ATTR_SEND_SEQ]); |
bb5016ea GN |
693 | l2tp_session_set_header_len(session, session->tunnel->version); |
694 | } | |
309795f4 JC |
695 | |
696 | if (info->attrs[L2TP_ATTR_LNS_MODE]) | |
697 | session->lns_mode = nla_get_u8(info->attrs[L2TP_ATTR_LNS_MODE]); | |
698 | ||
699 | if (info->attrs[L2TP_ATTR_RECV_TIMEOUT]) | |
700 | session->reorder_timeout = nla_get_msecs(info->attrs[L2TP_ATTR_RECV_TIMEOUT]); | |
701 | ||
702 | if (info->attrs[L2TP_ATTR_MTU]) | |
703 | session->mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]); | |
704 | ||
705 | if (info->attrs[L2TP_ATTR_MRU]) | |
706 | session->mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]); | |
707 | ||
33f72e6f BH |
708 | ret = l2tp_session_notify(&l2tp_nl_family, info, |
709 | session, L2TP_CMD_SESSION_MODIFY); | |
710 | ||
309795f4 JC |
711 | out: |
712 | return ret; | |
713 | } | |
714 | ||
15e47304 | 715 | static int l2tp_nl_session_send(struct sk_buff *skb, u32 portid, u32 seq, int flags, |
33f72e6f | 716 | struct l2tp_session *session, u8 cmd) |
309795f4 JC |
717 | { |
718 | void *hdr; | |
719 | struct nlattr *nest; | |
720 | struct l2tp_tunnel *tunnel = session->tunnel; | |
721 | struct sock *sk = NULL; | |
722 | ||
723 | sk = tunnel->sock; | |
724 | ||
33f72e6f | 725 | hdr = genlmsg_put(skb, portid, seq, &l2tp_nl_family, flags, cmd); |
7f8436a1 WY |
726 | if (!hdr) |
727 | return -EMSGSIZE; | |
309795f4 | 728 | |
60aed2ab DM |
729 | if (nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id) || |
730 | nla_put_u32(skb, L2TP_ATTR_SESSION_ID, session->session_id) || | |
731 | nla_put_u32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id) || | |
732 | nla_put_u32(skb, L2TP_ATTR_PEER_SESSION_ID, | |
733 | session->peer_session_id) || | |
734 | nla_put_u32(skb, L2TP_ATTR_DEBUG, session->debug) || | |
735 | nla_put_u16(skb, L2TP_ATTR_PW_TYPE, session->pwtype) || | |
736 | nla_put_u16(skb, L2TP_ATTR_MTU, session->mtu) || | |
737 | (session->mru && | |
738 | nla_put_u16(skb, L2TP_ATTR_MRU, session->mru))) | |
739 | goto nla_put_failure; | |
740 | ||
e269ed26 | 741 | if ((session->ifname[0] && |
60aed2ab DM |
742 | nla_put_string(skb, L2TP_ATTR_IFNAME, session->ifname)) || |
743 | (session->cookie_len && | |
744 | nla_put(skb, L2TP_ATTR_COOKIE, session->cookie_len, | |
745 | &session->cookie[0])) || | |
746 | (session->peer_cookie_len && | |
747 | nla_put(skb, L2TP_ATTR_PEER_COOKIE, session->peer_cookie_len, | |
748 | &session->peer_cookie[0])) || | |
749 | nla_put_u8(skb, L2TP_ATTR_RECV_SEQ, session->recv_seq) || | |
750 | nla_put_u8(skb, L2TP_ATTR_SEND_SEQ, session->send_seq) || | |
751 | nla_put_u8(skb, L2TP_ATTR_LNS_MODE, session->lns_mode) || | |
309795f4 | 752 | #ifdef CONFIG_XFRM |
60aed2ab DM |
753 | (((sk) && (sk->sk_policy[0] || sk->sk_policy[1])) && |
754 | nla_put_u8(skb, L2TP_ATTR_USING_IPSEC, 1)) || | |
309795f4 | 755 | #endif |
60aed2ab | 756 | (session->reorder_timeout && |
2175d87c ND |
757 | nla_put_msecs(skb, L2TP_ATTR_RECV_TIMEOUT, |
758 | session->reorder_timeout, L2TP_ATTR_PAD))) | |
60aed2ab | 759 | goto nla_put_failure; |
5de7aee5 | 760 | |
309795f4 JC |
761 | nest = nla_nest_start(skb, L2TP_ATTR_STATS); |
762 | if (nest == NULL) | |
763 | goto nla_put_failure; | |
5de7aee5 | 764 | |
1c714a92 ND |
765 | if (nla_put_u64_64bit(skb, L2TP_ATTR_TX_PACKETS, |
766 | atomic_long_read(&session->stats.tx_packets), | |
767 | L2TP_ATTR_STATS_PAD) || | |
768 | nla_put_u64_64bit(skb, L2TP_ATTR_TX_BYTES, | |
769 | atomic_long_read(&session->stats.tx_bytes), | |
770 | L2TP_ATTR_STATS_PAD) || | |
771 | nla_put_u64_64bit(skb, L2TP_ATTR_TX_ERRORS, | |
772 | atomic_long_read(&session->stats.tx_errors), | |
773 | L2TP_ATTR_STATS_PAD) || | |
774 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_PACKETS, | |
775 | atomic_long_read(&session->stats.rx_packets), | |
776 | L2TP_ATTR_STATS_PAD) || | |
777 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_BYTES, | |
778 | atomic_long_read(&session->stats.rx_bytes), | |
779 | L2TP_ATTR_STATS_PAD) || | |
780 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_SEQ_DISCARDS, | |
781 | atomic_long_read(&session->stats.rx_seq_discards), | |
782 | L2TP_ATTR_STATS_PAD) || | |
783 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_OOS_PACKETS, | |
784 | atomic_long_read(&session->stats.rx_oos_packets), | |
785 | L2TP_ATTR_STATS_PAD) || | |
786 | nla_put_u64_64bit(skb, L2TP_ATTR_RX_ERRORS, | |
787 | atomic_long_read(&session->stats.rx_errors), | |
788 | L2TP_ATTR_STATS_PAD)) | |
60aed2ab | 789 | goto nla_put_failure; |
309795f4 JC |
790 | nla_nest_end(skb, nest); |
791 | ||
053c095a JB |
792 | genlmsg_end(skb, hdr); |
793 | return 0; | |
309795f4 JC |
794 | |
795 | nla_put_failure: | |
796 | genlmsg_cancel(skb, hdr); | |
797 | return -1; | |
798 | } | |
799 | ||
800 | static int l2tp_nl_cmd_session_get(struct sk_buff *skb, struct genl_info *info) | |
801 | { | |
802 | struct l2tp_session *session; | |
803 | struct sk_buff *msg; | |
804 | int ret; | |
805 | ||
806 | session = l2tp_nl_session_find(info); | |
807 | if (session == NULL) { | |
808 | ret = -ENODEV; | |
809 | goto out; | |
810 | } | |
811 | ||
58050fce | 812 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
309795f4 JC |
813 | if (!msg) { |
814 | ret = -ENOMEM; | |
815 | goto out; | |
816 | } | |
817 | ||
15e47304 | 818 | ret = l2tp_nl_session_send(msg, info->snd_portid, info->snd_seq, |
33f72e6f | 819 | 0, session, L2TP_CMD_SESSION_GET); |
309795f4 JC |
820 | if (ret < 0) |
821 | goto err_out; | |
822 | ||
15e47304 | 823 | return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid); |
309795f4 JC |
824 | |
825 | err_out: | |
826 | nlmsg_free(msg); | |
827 | ||
828 | out: | |
829 | return ret; | |
830 | } | |
831 | ||
832 | static int l2tp_nl_cmd_session_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
833 | { | |
834 | struct net *net = sock_net(skb->sk); | |
835 | struct l2tp_session *session; | |
836 | struct l2tp_tunnel *tunnel = NULL; | |
837 | int ti = cb->args[0]; | |
838 | int si = cb->args[1]; | |
839 | ||
840 | for (;;) { | |
841 | if (tunnel == NULL) { | |
842 | tunnel = l2tp_tunnel_find_nth(net, ti); | |
843 | if (tunnel == NULL) | |
844 | goto out; | |
845 | } | |
846 | ||
847 | session = l2tp_session_find_nth(tunnel, si); | |
848 | if (session == NULL) { | |
849 | ti++; | |
850 | tunnel = NULL; | |
851 | si = 0; | |
852 | continue; | |
853 | } | |
854 | ||
15e47304 | 855 | if (l2tp_nl_session_send(skb, NETLINK_CB(cb->skb).portid, |
309795f4 | 856 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
053c095a | 857 | session, L2TP_CMD_SESSION_GET) < 0) |
309795f4 JC |
858 | break; |
859 | ||
860 | si++; | |
861 | } | |
862 | ||
863 | out: | |
864 | cb->args[0] = ti; | |
865 | cb->args[1] = si; | |
866 | ||
867 | return skb->len; | |
868 | } | |
869 | ||
870 | static struct nla_policy l2tp_nl_policy[L2TP_ATTR_MAX + 1] = { | |
871 | [L2TP_ATTR_NONE] = { .type = NLA_UNSPEC, }, | |
872 | [L2TP_ATTR_PW_TYPE] = { .type = NLA_U16, }, | |
873 | [L2TP_ATTR_ENCAP_TYPE] = { .type = NLA_U16, }, | |
874 | [L2TP_ATTR_OFFSET] = { .type = NLA_U16, }, | |
875 | [L2TP_ATTR_DATA_SEQ] = { .type = NLA_U8, }, | |
876 | [L2TP_ATTR_L2SPEC_TYPE] = { .type = NLA_U8, }, | |
877 | [L2TP_ATTR_L2SPEC_LEN] = { .type = NLA_U8, }, | |
878 | [L2TP_ATTR_PROTO_VERSION] = { .type = NLA_U8, }, | |
879 | [L2TP_ATTR_CONN_ID] = { .type = NLA_U32, }, | |
880 | [L2TP_ATTR_PEER_CONN_ID] = { .type = NLA_U32, }, | |
881 | [L2TP_ATTR_SESSION_ID] = { .type = NLA_U32, }, | |
882 | [L2TP_ATTR_PEER_SESSION_ID] = { .type = NLA_U32, }, | |
883 | [L2TP_ATTR_UDP_CSUM] = { .type = NLA_U8, }, | |
884 | [L2TP_ATTR_VLAN_ID] = { .type = NLA_U16, }, | |
885 | [L2TP_ATTR_DEBUG] = { .type = NLA_U32, }, | |
886 | [L2TP_ATTR_RECV_SEQ] = { .type = NLA_U8, }, | |
887 | [L2TP_ATTR_SEND_SEQ] = { .type = NLA_U8, }, | |
888 | [L2TP_ATTR_LNS_MODE] = { .type = NLA_U8, }, | |
889 | [L2TP_ATTR_USING_IPSEC] = { .type = NLA_U8, }, | |
890 | [L2TP_ATTR_RECV_TIMEOUT] = { .type = NLA_MSECS, }, | |
891 | [L2TP_ATTR_FD] = { .type = NLA_U32, }, | |
892 | [L2TP_ATTR_IP_SADDR] = { .type = NLA_U32, }, | |
893 | [L2TP_ATTR_IP_DADDR] = { .type = NLA_U32, }, | |
894 | [L2TP_ATTR_UDP_SPORT] = { .type = NLA_U16, }, | |
895 | [L2TP_ATTR_UDP_DPORT] = { .type = NLA_U16, }, | |
896 | [L2TP_ATTR_MTU] = { .type = NLA_U16, }, | |
897 | [L2TP_ATTR_MRU] = { .type = NLA_U16, }, | |
898 | [L2TP_ATTR_STATS] = { .type = NLA_NESTED, }, | |
f9bac8df CE |
899 | [L2TP_ATTR_IP6_SADDR] = { |
900 | .type = NLA_BINARY, | |
901 | .len = sizeof(struct in6_addr), | |
902 | }, | |
903 | [L2TP_ATTR_IP6_DADDR] = { | |
904 | .type = NLA_BINARY, | |
905 | .len = sizeof(struct in6_addr), | |
906 | }, | |
309795f4 JC |
907 | [L2TP_ATTR_IFNAME] = { |
908 | .type = NLA_NUL_STRING, | |
909 | .len = IFNAMSIZ - 1, | |
910 | }, | |
911 | [L2TP_ATTR_COOKIE] = { | |
912 | .type = NLA_BINARY, | |
913 | .len = 8, | |
914 | }, | |
915 | [L2TP_ATTR_PEER_COOKIE] = { | |
916 | .type = NLA_BINARY, | |
917 | .len = 8, | |
918 | }, | |
919 | }; | |
920 | ||
4534de83 | 921 | static const struct genl_ops l2tp_nl_ops[] = { |
309795f4 JC |
922 | { |
923 | .cmd = L2TP_CMD_NOOP, | |
924 | .doit = l2tp_nl_cmd_noop, | |
925 | .policy = l2tp_nl_policy, | |
926 | /* can be retrieved by unprivileged users */ | |
927 | }, | |
928 | { | |
929 | .cmd = L2TP_CMD_TUNNEL_CREATE, | |
930 | .doit = l2tp_nl_cmd_tunnel_create, | |
931 | .policy = l2tp_nl_policy, | |
932 | .flags = GENL_ADMIN_PERM, | |
933 | }, | |
934 | { | |
935 | .cmd = L2TP_CMD_TUNNEL_DELETE, | |
936 | .doit = l2tp_nl_cmd_tunnel_delete, | |
937 | .policy = l2tp_nl_policy, | |
938 | .flags = GENL_ADMIN_PERM, | |
939 | }, | |
940 | { | |
941 | .cmd = L2TP_CMD_TUNNEL_MODIFY, | |
942 | .doit = l2tp_nl_cmd_tunnel_modify, | |
943 | .policy = l2tp_nl_policy, | |
944 | .flags = GENL_ADMIN_PERM, | |
945 | }, | |
946 | { | |
947 | .cmd = L2TP_CMD_TUNNEL_GET, | |
948 | .doit = l2tp_nl_cmd_tunnel_get, | |
949 | .dumpit = l2tp_nl_cmd_tunnel_dump, | |
950 | .policy = l2tp_nl_policy, | |
951 | .flags = GENL_ADMIN_PERM, | |
952 | }, | |
953 | { | |
954 | .cmd = L2TP_CMD_SESSION_CREATE, | |
955 | .doit = l2tp_nl_cmd_session_create, | |
956 | .policy = l2tp_nl_policy, | |
957 | .flags = GENL_ADMIN_PERM, | |
958 | }, | |
959 | { | |
960 | .cmd = L2TP_CMD_SESSION_DELETE, | |
961 | .doit = l2tp_nl_cmd_session_delete, | |
962 | .policy = l2tp_nl_policy, | |
963 | .flags = GENL_ADMIN_PERM, | |
964 | }, | |
965 | { | |
966 | .cmd = L2TP_CMD_SESSION_MODIFY, | |
967 | .doit = l2tp_nl_cmd_session_modify, | |
968 | .policy = l2tp_nl_policy, | |
969 | .flags = GENL_ADMIN_PERM, | |
970 | }, | |
971 | { | |
972 | .cmd = L2TP_CMD_SESSION_GET, | |
973 | .doit = l2tp_nl_cmd_session_get, | |
974 | .dumpit = l2tp_nl_cmd_session_dump, | |
975 | .policy = l2tp_nl_policy, | |
976 | .flags = GENL_ADMIN_PERM, | |
977 | }, | |
978 | }; | |
979 | ||
980 | int l2tp_nl_register_ops(enum l2tp_pwtype pw_type, const struct l2tp_nl_cmd_ops *ops) | |
981 | { | |
982 | int ret; | |
983 | ||
984 | ret = -EINVAL; | |
985 | if (pw_type >= __L2TP_PWTYPE_MAX) | |
986 | goto err; | |
987 | ||
988 | genl_lock(); | |
989 | ret = -EBUSY; | |
990 | if (l2tp_nl_cmd_ops[pw_type]) | |
991 | goto out; | |
992 | ||
993 | l2tp_nl_cmd_ops[pw_type] = ops; | |
8cb49014 | 994 | ret = 0; |
309795f4 JC |
995 | |
996 | out: | |
997 | genl_unlock(); | |
998 | err: | |
8cb49014 | 999 | return ret; |
309795f4 JC |
1000 | } |
1001 | EXPORT_SYMBOL_GPL(l2tp_nl_register_ops); | |
1002 | ||
1003 | void l2tp_nl_unregister_ops(enum l2tp_pwtype pw_type) | |
1004 | { | |
1005 | if (pw_type < __L2TP_PWTYPE_MAX) { | |
1006 | genl_lock(); | |
1007 | l2tp_nl_cmd_ops[pw_type] = NULL; | |
1008 | genl_unlock(); | |
1009 | } | |
1010 | } | |
1011 | EXPORT_SYMBOL_GPL(l2tp_nl_unregister_ops); | |
1012 | ||
1013 | static int l2tp_nl_init(void) | |
1014 | { | |
a4ca44fa | 1015 | pr_info("L2TP netlink interface\n"); |
33f72e6f BH |
1016 | return genl_register_family_with_ops_groups(&l2tp_nl_family, |
1017 | l2tp_nl_ops, | |
1018 | l2tp_multicast_group); | |
309795f4 JC |
1019 | } |
1020 | ||
1021 | static void l2tp_nl_cleanup(void) | |
1022 | { | |
1023 | genl_unregister_family(&l2tp_nl_family); | |
1024 | } | |
1025 | ||
1026 | module_init(l2tp_nl_init); | |
1027 | module_exit(l2tp_nl_cleanup); | |
1028 | ||
1029 | MODULE_AUTHOR("James Chapman <jchapman@katalix.com>"); | |
1030 | MODULE_DESCRIPTION("L2TP netlink"); | |
1031 | MODULE_LICENSE("GPL"); | |
1032 | MODULE_VERSION("1.0"); | |
e9412c37 | 1033 | MODULE_ALIAS_GENL_FAMILY("l2tp"); |