2 * L2TP netlink layer, for management
4 * Copyright (c) 2008,2009,2010 Katalix Systems Ltd
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>
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.
17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20 #include <net/genetlink.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>
29 #include <linux/l2tp.h>
31 #include "l2tp_core.h"
34 static struct genl_family l2tp_nl_family
= {
35 .id
= GENL_ID_GENERATE
,
36 .name
= L2TP_GENL_NAME
,
37 .version
= L2TP_GENL_VERSION
,
39 .maxattr
= L2TP_ATTR_MAX
,
43 static const struct genl_multicast_group l2tp_multicast_group
[] = {
45 .name
= L2TP_GENL_MCGROUP
,
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
,
55 /* Accessed under genl lock */
56 static const struct l2tp_nl_cmd_ops
*l2tp_nl_cmd_ops
[__L2TP_PWTYPE_MAX
];
58 static struct l2tp_session
*l2tp_nl_session_find(struct genl_info
*info
)
63 struct l2tp_tunnel
*tunnel
;
64 struct l2tp_session
*session
= NULL
;
65 struct net
*net
= genl_info_net(info
);
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
);
76 session
= l2tp_session_find(net
, tunnel
, session_id
);
82 static int l2tp_nl_cmd_noop(struct sk_buff
*skb
, struct genl_info
*info
)
88 msg
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
94 hdr
= genlmsg_put(msg
, info
->snd_portid
, info
->snd_seq
,
95 &l2tp_nl_family
, 0, L2TP_CMD_NOOP
);
101 genlmsg_end(msg
, hdr
);
103 return genlmsg_unicast(genl_info_net(info
), msg
, info
->snd_portid
);
112 static int l2tp_tunnel_notify(struct genl_family
*family
,
113 struct genl_info
*info
,
114 struct l2tp_tunnel
*tunnel
,
120 msg
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
124 ret
= l2tp_nl_tunnel_send(msg
, info
->snd_portid
, info
->snd_seq
,
125 NLM_F_ACK
, tunnel
, cmd
);
128 ret
= genlmsg_multicast_allns(family
, msg
, 0, 0, GFP_ATOMIC
);
129 /* We don't care if no one is listening */
140 static int l2tp_session_notify(struct genl_family
*family
,
141 struct genl_info
*info
,
142 struct l2tp_session
*session
,
148 msg
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
152 ret
= l2tp_nl_session_send(msg
, info
->snd_portid
, info
->snd_seq
,
153 NLM_F_ACK
, session
, cmd
);
156 ret
= genlmsg_multicast_allns(family
, msg
, 0, 0, GFP_ATOMIC
);
157 /* We don't care if no one is listening */
168 static int l2tp_nl_cmd_tunnel_create(struct sk_buff
*skb
, struct genl_info
*info
)
175 struct l2tp_tunnel_cfg cfg
= { 0, };
176 struct l2tp_tunnel
*tunnel
;
177 struct net
*net
= genl_info_net(info
);
179 if (!info
->attrs
[L2TP_ATTR_CONN_ID
]) {
183 tunnel_id
= nla_get_u32(info
->attrs
[L2TP_ATTR_CONN_ID
]);
185 if (!info
->attrs
[L2TP_ATTR_PEER_CONN_ID
]) {
189 peer_tunnel_id
= nla_get_u32(info
->attrs
[L2TP_ATTR_PEER_CONN_ID
]);
191 if (!info
->attrs
[L2TP_ATTR_PROTO_VERSION
]) {
195 proto_version
= nla_get_u8(info
->attrs
[L2TP_ATTR_PROTO_VERSION
]);
197 if (!info
->attrs
[L2TP_ATTR_ENCAP_TYPE
]) {
201 cfg
.encap
= nla_get_u16(info
->attrs
[L2TP_ATTR_ENCAP_TYPE
]);
204 if (info
->attrs
[L2TP_ATTR_FD
]) {
205 fd
= nla_get_u32(info
->attrs
[L2TP_ATTR_FD
]);
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
]);
216 if (info
->attrs
[L2TP_ATTR_IP_SADDR
] &&
217 info
->attrs
[L2TP_ATTR_IP_DADDR
]) {
218 cfg
.local_ip
.s_addr
= nla_get_in_addr(
219 info
->attrs
[L2TP_ATTR_IP_SADDR
]);
220 cfg
.peer_ip
.s_addr
= nla_get_in_addr(
221 info
->attrs
[L2TP_ATTR_IP_DADDR
]);
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
]);
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
]);
241 if (info
->attrs
[L2TP_ATTR_DEBUG
])
242 cfg
.debug
= nla_get_u32(info
->attrs
[L2TP_ATTR_DEBUG
]);
244 tunnel
= l2tp_tunnel_find(net
, tunnel_id
);
245 if (tunnel
!= NULL
) {
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
);
260 ret
= l2tp_tunnel_notify(&l2tp_nl_family
, info
,
261 tunnel
, L2TP_CMD_TUNNEL_CREATE
);
266 static int l2tp_nl_cmd_tunnel_delete(struct sk_buff
*skb
, struct genl_info
*info
)
268 struct l2tp_tunnel
*tunnel
;
271 struct net
*net
= genl_info_net(info
);
273 if (!info
->attrs
[L2TP_ATTR_CONN_ID
]) {
277 tunnel_id
= nla_get_u32(info
->attrs
[L2TP_ATTR_CONN_ID
]);
279 tunnel
= l2tp_tunnel_find(net
, tunnel_id
);
280 if (tunnel
== NULL
) {
285 l2tp_tunnel_notify(&l2tp_nl_family
, info
,
286 tunnel
, L2TP_CMD_TUNNEL_DELETE
);
288 (void) l2tp_tunnel_delete(tunnel
);
294 static int l2tp_nl_cmd_tunnel_modify(struct sk_buff
*skb
, struct genl_info
*info
)
296 struct l2tp_tunnel
*tunnel
;
299 struct net
*net
= genl_info_net(info
);
301 if (!info
->attrs
[L2TP_ATTR_CONN_ID
]) {
305 tunnel_id
= nla_get_u32(info
->attrs
[L2TP_ATTR_CONN_ID
]);
307 tunnel
= l2tp_tunnel_find(net
, tunnel_id
);
308 if (tunnel
== NULL
) {
313 if (info
->attrs
[L2TP_ATTR_DEBUG
])
314 tunnel
->debug
= nla_get_u32(info
->attrs
[L2TP_ATTR_DEBUG
]);
316 ret
= l2tp_tunnel_notify(&l2tp_nl_family
, info
,
317 tunnel
, L2TP_CMD_TUNNEL_MODIFY
);
323 static int l2tp_nl_tunnel_send(struct sk_buff
*skb
, u32 portid
, u32 seq
, int flags
,
324 struct l2tp_tunnel
*tunnel
, u8 cmd
)
328 struct sock
*sk
= NULL
;
329 struct inet_sock
*inet
;
330 #if IS_ENABLED(CONFIG_IPV6)
331 struct ipv6_pinfo
*np
= NULL
;
334 hdr
= genlmsg_put(skb
, portid
, seq
, &l2tp_nl_family
, flags
, cmd
);
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
;
345 nest
= nla_nest_start(skb
, L2TP_ATTR_STATS
);
347 goto nla_put_failure
;
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
)) ||
359 nla_put_u64(skb
, L2TP_ATTR_RX_SEQ_DISCARDS
,
360 atomic_long_read(&tunnel
->stats
.rx_seq_discards
)) ||
361 nla_put_u64(skb
, L2TP_ATTR_RX_OOS_PACKETS
,
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
)))
365 goto nla_put_failure
;
366 nla_nest_end(skb
, nest
);
372 #if IS_ENABLED(CONFIG_IPV6)
373 if (sk
->sk_family
== AF_INET6
)
379 switch (tunnel
->encap
) {
380 case L2TP_ENCAPTYPE_UDP
:
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
)) ||
383 nla_put_u8(skb
, L2TP_ATTR_UDP_CSUM
, !sk
->sk_no_check_tx
))
384 goto nla_put_failure
;
386 case L2TP_ENCAPTYPE_IP
:
387 #if IS_ENABLED(CONFIG_IPV6)
389 if (nla_put_in6_addr(skb
, L2TP_ATTR_IP6_SADDR
,
391 nla_put_in6_addr(skb
, L2TP_ATTR_IP6_DADDR
,
393 goto nla_put_failure
;
396 if (nla_put_in_addr(skb
, L2TP_ATTR_IP_SADDR
,
398 nla_put_in_addr(skb
, L2TP_ATTR_IP_DADDR
,
400 goto nla_put_failure
;
405 genlmsg_end(skb
, hdr
);
409 genlmsg_cancel(skb
, hdr
);
413 static int l2tp_nl_cmd_tunnel_get(struct sk_buff
*skb
, struct genl_info
*info
)
415 struct l2tp_tunnel
*tunnel
;
419 struct net
*net
= genl_info_net(info
);
421 if (!info
->attrs
[L2TP_ATTR_CONN_ID
]) {
426 tunnel_id
= nla_get_u32(info
->attrs
[L2TP_ATTR_CONN_ID
]);
428 tunnel
= l2tp_tunnel_find(net
, tunnel_id
);
429 if (tunnel
== NULL
) {
434 msg
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
440 ret
= l2tp_nl_tunnel_send(msg
, info
->snd_portid
, info
->snd_seq
,
441 NLM_F_ACK
, tunnel
, L2TP_CMD_TUNNEL_GET
);
445 return genlmsg_unicast(net
, msg
, info
->snd_portid
);
454 static int l2tp_nl_cmd_tunnel_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
456 int ti
= cb
->args
[0];
457 struct l2tp_tunnel
*tunnel
;
458 struct net
*net
= sock_net(skb
->sk
);
461 tunnel
= l2tp_tunnel_find_nth(net
, ti
);
465 if (l2tp_nl_tunnel_send(skb
, NETLINK_CB(cb
->skb
).portid
,
466 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
467 tunnel
, L2TP_CMD_TUNNEL_GET
) < 0)
479 static int l2tp_nl_cmd_session_create(struct sk_buff
*skb
, struct genl_info
*info
)
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
);
490 if (!info
->attrs
[L2TP_ATTR_CONN_ID
]) {
494 tunnel_id
= nla_get_u32(info
->attrs
[L2TP_ATTR_CONN_ID
]);
495 tunnel
= l2tp_tunnel_find(net
, tunnel_id
);
501 if (!info
->attrs
[L2TP_ATTR_SESSION_ID
]) {
505 session_id
= nla_get_u32(info
->attrs
[L2TP_ATTR_SESSION_ID
]);
506 session
= l2tp_session_find(net
, tunnel
, session_id
);
512 if (!info
->attrs
[L2TP_ATTR_PEER_SESSION_ID
]) {
516 peer_session_id
= nla_get_u32(info
->attrs
[L2TP_ATTR_PEER_SESSION_ID
]);
518 if (!info
->attrs
[L2TP_ATTR_PW_TYPE
]) {
522 cfg
.pw_type
= nla_get_u16(info
->attrs
[L2TP_ATTR_PW_TYPE
]);
523 if (cfg
.pw_type
>= __L2TP_PWTYPE_MAX
) {
528 if (tunnel
->version
> 2) {
529 if (info
->attrs
[L2TP_ATTR_OFFSET
])
530 cfg
.offset
= nla_get_u16(info
->attrs
[L2TP_ATTR_OFFSET
]);
532 if (info
->attrs
[L2TP_ATTR_DATA_SEQ
])
533 cfg
.data_seq
= nla_get_u8(info
->attrs
[L2TP_ATTR_DATA_SEQ
]);
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
]);
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
]);
543 if (info
->attrs
[L2TP_ATTR_COOKIE
]) {
544 u16 len
= nla_len(info
->attrs
[L2TP_ATTR_COOKIE
]);
549 cfg
.cookie_len
= len
;
550 memcpy(&cfg
.cookie
[0], nla_data(info
->attrs
[L2TP_ATTR_COOKIE
]), len
);
552 if (info
->attrs
[L2TP_ATTR_PEER_COOKIE
]) {
553 u16 len
= nla_len(info
->attrs
[L2TP_ATTR_PEER_COOKIE
]);
558 cfg
.peer_cookie_len
= len
;
559 memcpy(&cfg
.peer_cookie
[0], nla_data(info
->attrs
[L2TP_ATTR_PEER_COOKIE
]), len
);
561 if (info
->attrs
[L2TP_ATTR_IFNAME
])
562 cfg
.ifname
= nla_data(info
->attrs
[L2TP_ATTR_IFNAME
]);
564 if (info
->attrs
[L2TP_ATTR_VLAN_ID
])
565 cfg
.vlan_id
= nla_get_u16(info
->attrs
[L2TP_ATTR_VLAN_ID
]);
568 if (info
->attrs
[L2TP_ATTR_DEBUG
])
569 cfg
.debug
= nla_get_u32(info
->attrs
[L2TP_ATTR_DEBUG
]);
571 if (info
->attrs
[L2TP_ATTR_RECV_SEQ
])
572 cfg
.recv_seq
= nla_get_u8(info
->attrs
[L2TP_ATTR_RECV_SEQ
]);
574 if (info
->attrs
[L2TP_ATTR_SEND_SEQ
])
575 cfg
.send_seq
= nla_get_u8(info
->attrs
[L2TP_ATTR_SEND_SEQ
]);
577 if (info
->attrs
[L2TP_ATTR_LNS_MODE
])
578 cfg
.lns_mode
= nla_get_u8(info
->attrs
[L2TP_ATTR_LNS_MODE
]);
580 if (info
->attrs
[L2TP_ATTR_RECV_TIMEOUT
])
581 cfg
.reorder_timeout
= nla_get_msecs(info
->attrs
[L2TP_ATTR_RECV_TIMEOUT
]);
583 if (info
->attrs
[L2TP_ATTR_MTU
])
584 cfg
.mtu
= nla_get_u16(info
->attrs
[L2TP_ATTR_MTU
]);
586 if (info
->attrs
[L2TP_ATTR_MRU
])
587 cfg
.mru
= nla_get_u16(info
->attrs
[L2TP_ATTR_MRU
]);
589 #ifdef CONFIG_MODULES
590 if (l2tp_nl_cmd_ops
[cfg
.pw_type
] == NULL
) {
592 request_module("net-l2tp-type-%u", cfg
.pw_type
);
596 if ((l2tp_nl_cmd_ops
[cfg
.pw_type
] == NULL
) ||
597 (l2tp_nl_cmd_ops
[cfg
.pw_type
]->session_create
== NULL
)) {
598 ret
= -EPROTONOSUPPORT
;
602 /* Check that pseudowire-specific params are present */
603 switch (cfg
.pw_type
) {
604 case L2TP_PWTYPE_NONE
:
606 case L2TP_PWTYPE_ETH_VLAN
:
607 if (!info
->attrs
[L2TP_ATTR_VLAN_ID
]) {
612 case L2TP_PWTYPE_ETH
:
614 case L2TP_PWTYPE_PPP
:
615 case L2TP_PWTYPE_PPP_AC
:
619 ret
= -EPROTONOSUPPORT
;
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
);
629 session
= l2tp_session_find(net
, tunnel
, session_id
);
631 ret
= l2tp_session_notify(&l2tp_nl_family
, info
, session
,
632 L2TP_CMD_SESSION_CREATE
);
639 static int l2tp_nl_cmd_session_delete(struct sk_buff
*skb
, struct genl_info
*info
)
642 struct l2tp_session
*session
;
645 session
= l2tp_nl_session_find(info
);
646 if (session
== NULL
) {
651 l2tp_session_notify(&l2tp_nl_family
, info
,
652 session
, L2TP_CMD_SESSION_DELETE
);
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
);
663 static int l2tp_nl_cmd_session_modify(struct sk_buff
*skb
, struct genl_info
*info
)
666 struct l2tp_session
*session
;
668 session
= l2tp_nl_session_find(info
);
669 if (session
== NULL
) {
674 if (info
->attrs
[L2TP_ATTR_DEBUG
])
675 session
->debug
= nla_get_u32(info
->attrs
[L2TP_ATTR_DEBUG
]);
677 if (info
->attrs
[L2TP_ATTR_DATA_SEQ
])
678 session
->data_seq
= nla_get_u8(info
->attrs
[L2TP_ATTR_DATA_SEQ
]);
680 if (info
->attrs
[L2TP_ATTR_RECV_SEQ
])
681 session
->recv_seq
= nla_get_u8(info
->attrs
[L2TP_ATTR_RECV_SEQ
]);
683 if (info
->attrs
[L2TP_ATTR_SEND_SEQ
]) {
684 session
->send_seq
= nla_get_u8(info
->attrs
[L2TP_ATTR_SEND_SEQ
]);
685 l2tp_session_set_header_len(session
, session
->tunnel
->version
);
688 if (info
->attrs
[L2TP_ATTR_LNS_MODE
])
689 session
->lns_mode
= nla_get_u8(info
->attrs
[L2TP_ATTR_LNS_MODE
]);
691 if (info
->attrs
[L2TP_ATTR_RECV_TIMEOUT
])
692 session
->reorder_timeout
= nla_get_msecs(info
->attrs
[L2TP_ATTR_RECV_TIMEOUT
]);
694 if (info
->attrs
[L2TP_ATTR_MTU
])
695 session
->mtu
= nla_get_u16(info
->attrs
[L2TP_ATTR_MTU
]);
697 if (info
->attrs
[L2TP_ATTR_MRU
])
698 session
->mru
= nla_get_u16(info
->attrs
[L2TP_ATTR_MRU
]);
700 ret
= l2tp_session_notify(&l2tp_nl_family
, info
,
701 session
, L2TP_CMD_SESSION_MODIFY
);
707 static int l2tp_nl_session_send(struct sk_buff
*skb
, u32 portid
, u32 seq
, int flags
,
708 struct l2tp_session
*session
, u8 cmd
)
712 struct l2tp_tunnel
*tunnel
= session
->tunnel
;
713 struct sock
*sk
= NULL
;
717 hdr
= genlmsg_put(skb
, portid
, seq
, &l2tp_nl_family
, flags
, cmd
);
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
) ||
730 nla_put_u16(skb
, L2TP_ATTR_MRU
, session
->mru
)))
731 goto nla_put_failure
;
733 if ((session
->ifname
[0] &&
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
) ||
745 (((sk
) && (sk
->sk_policy
[0] || sk
->sk_policy
[1])) &&
746 nla_put_u8(skb
, L2TP_ATTR_USING_IPSEC
, 1)) ||
748 (session
->reorder_timeout
&&
749 nla_put_msecs(skb
, L2TP_ATTR_RECV_TIMEOUT
, session
->reorder_timeout
)))
750 goto nla_put_failure
;
752 nest
= nla_nest_start(skb
, L2TP_ATTR_STATS
);
754 goto nla_put_failure
;
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
)) ||
766 nla_put_u64(skb
, L2TP_ATTR_RX_SEQ_DISCARDS
,
767 atomic_long_read(&session
->stats
.rx_seq_discards
)) ||
768 nla_put_u64(skb
, L2TP_ATTR_RX_OOS_PACKETS
,
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
)))
772 goto nla_put_failure
;
773 nla_nest_end(skb
, nest
);
775 genlmsg_end(skb
, hdr
);
779 genlmsg_cancel(skb
, hdr
);
783 static int l2tp_nl_cmd_session_get(struct sk_buff
*skb
, struct genl_info
*info
)
785 struct l2tp_session
*session
;
789 session
= l2tp_nl_session_find(info
);
790 if (session
== NULL
) {
795 msg
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
801 ret
= l2tp_nl_session_send(msg
, info
->snd_portid
, info
->snd_seq
,
802 0, session
, L2TP_CMD_SESSION_GET
);
806 return genlmsg_unicast(genl_info_net(info
), msg
, info
->snd_portid
);
815 static int l2tp_nl_cmd_session_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
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];
824 if (tunnel
== NULL
) {
825 tunnel
= l2tp_tunnel_find_nth(net
, ti
);
830 session
= l2tp_session_find_nth(tunnel
, si
);
831 if (session
== NULL
) {
838 if (l2tp_nl_session_send(skb
, NETLINK_CB(cb
->skb
).portid
,
839 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
840 session
, L2TP_CMD_SESSION_GET
) < 0)
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
, },
882 [L2TP_ATTR_IP6_SADDR
] = {
884 .len
= sizeof(struct in6_addr
),
886 [L2TP_ATTR_IP6_DADDR
] = {
888 .len
= sizeof(struct in6_addr
),
890 [L2TP_ATTR_IFNAME
] = {
891 .type
= NLA_NUL_STRING
,
894 [L2TP_ATTR_COOKIE
] = {
898 [L2TP_ATTR_PEER_COOKIE
] = {
904 static const struct genl_ops l2tp_nl_ops
[] = {
906 .cmd
= L2TP_CMD_NOOP
,
907 .doit
= l2tp_nl_cmd_noop
,
908 .policy
= l2tp_nl_policy
,
909 /* can be retrieved by unprivileged users */
912 .cmd
= L2TP_CMD_TUNNEL_CREATE
,
913 .doit
= l2tp_nl_cmd_tunnel_create
,
914 .policy
= l2tp_nl_policy
,
915 .flags
= GENL_ADMIN_PERM
,
918 .cmd
= L2TP_CMD_TUNNEL_DELETE
,
919 .doit
= l2tp_nl_cmd_tunnel_delete
,
920 .policy
= l2tp_nl_policy
,
921 .flags
= GENL_ADMIN_PERM
,
924 .cmd
= L2TP_CMD_TUNNEL_MODIFY
,
925 .doit
= l2tp_nl_cmd_tunnel_modify
,
926 .policy
= l2tp_nl_policy
,
927 .flags
= GENL_ADMIN_PERM
,
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
,
937 .cmd
= L2TP_CMD_SESSION_CREATE
,
938 .doit
= l2tp_nl_cmd_session_create
,
939 .policy
= l2tp_nl_policy
,
940 .flags
= GENL_ADMIN_PERM
,
943 .cmd
= L2TP_CMD_SESSION_DELETE
,
944 .doit
= l2tp_nl_cmd_session_delete
,
945 .policy
= l2tp_nl_policy
,
946 .flags
= GENL_ADMIN_PERM
,
949 .cmd
= L2TP_CMD_SESSION_MODIFY
,
950 .doit
= l2tp_nl_cmd_session_modify
,
951 .policy
= l2tp_nl_policy
,
952 .flags
= GENL_ADMIN_PERM
,
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
,
963 int l2tp_nl_register_ops(enum l2tp_pwtype pw_type
, const struct l2tp_nl_cmd_ops
*ops
)
968 if (pw_type
>= __L2TP_PWTYPE_MAX
)
973 if (l2tp_nl_cmd_ops
[pw_type
])
976 l2tp_nl_cmd_ops
[pw_type
] = ops
;
984 EXPORT_SYMBOL_GPL(l2tp_nl_register_ops
);
986 void l2tp_nl_unregister_ops(enum l2tp_pwtype pw_type
)
988 if (pw_type
< __L2TP_PWTYPE_MAX
) {
990 l2tp_nl_cmd_ops
[pw_type
] = NULL
;
994 EXPORT_SYMBOL_GPL(l2tp_nl_unregister_ops
);
996 static int l2tp_nl_init(void)
998 pr_info("L2TP netlink interface\n");
999 return genl_register_family_with_ops_groups(&l2tp_nl_family
,
1001 l2tp_multicast_group
);
1004 static void l2tp_nl_cleanup(void)
1006 genl_unregister_family(&l2tp_nl_family
);
1009 module_init(l2tp_nl_init
);
1010 module_exit(l2tp_nl_cleanup
);
1012 MODULE_AUTHOR("James Chapman <jchapman@katalix.com>");
1013 MODULE_DESCRIPTION("L2TP netlink");
1014 MODULE_LICENSE("GPL");
1015 MODULE_VERSION("1.0");
1016 MODULE_ALIAS_GENL_FAMILY("l2tp");