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");