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_get(struct genl_info *info,
64 struct l2tp_tunnel *tunnel;
65 struct l2tp_session *session = NULL;
66 struct net *net = genl_info_net(info);
68 if (info->attrs[L2TP_ATTR_IFNAME]) {
69 ifname = nla_data(info->attrs[L2TP_ATTR_IFNAME]);
70 session = l2tp_session_get_by_ifname(net, ifname, do_ref);
71 } else if ((info->attrs[L2TP_ATTR_SESSION_ID]) &&
72 (info->attrs[L2TP_ATTR_CONN_ID])) {
73 tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
74 session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]);
75 tunnel = l2tp_tunnel_get(net, tunnel_id);
77 session = l2tp_session_get(net, tunnel, session_id,
79 l2tp_tunnel_dec_refcount(tunnel);
86 static int l2tp_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
92 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
98 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
99 &l2tp_nl_family, 0, L2TP_CMD_NOOP);
105 genlmsg_end(msg, hdr);
107 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
116 static int l2tp_tunnel_notify(struct genl_family *family,
117 struct genl_info *info,
118 struct l2tp_tunnel *tunnel,
124 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
128 ret = l2tp_nl_tunnel_send(msg, info->snd_portid, info->snd_seq,
129 NLM_F_ACK, tunnel, cmd);
132 ret = genlmsg_multicast_allns(family, msg, 0, 0, GFP_ATOMIC);
133 /* We don't care if no one is listening */
144 static int l2tp_session_notify(struct genl_family *family,
145 struct genl_info *info,
146 struct l2tp_session *session,
152 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
156 ret = l2tp_nl_session_send(msg, info->snd_portid, info->snd_seq,
157 NLM_F_ACK, session, cmd);
160 ret = genlmsg_multicast_allns(family, msg, 0, 0, GFP_ATOMIC);
161 /* We don't care if no one is listening */
172 static int l2tp_nl_cmd_tunnel_create(struct sk_buff *skb, struct genl_info *info)
179 struct l2tp_tunnel_cfg cfg = { 0, };
180 struct l2tp_tunnel *tunnel;
181 struct net *net = genl_info_net(info);
183 if (!info->attrs[L2TP_ATTR_CONN_ID]) {
187 tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
189 if (!info->attrs[L2TP_ATTR_PEER_CONN_ID]) {
193 peer_tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_CONN_ID]);
195 if (!info->attrs[L2TP_ATTR_PROTO_VERSION]) {
199 proto_version = nla_get_u8(info->attrs[L2TP_ATTR_PROTO_VERSION]);
201 if (!info->attrs[L2TP_ATTR_ENCAP_TYPE]) {
205 cfg.encap = nla_get_u16(info->attrs[L2TP_ATTR_ENCAP_TYPE]);
208 if (info->attrs[L2TP_ATTR_FD]) {
209 fd = nla_get_u32(info->attrs[L2TP_ATTR_FD]);
211 #if IS_ENABLED(CONFIG_IPV6)
212 if (info->attrs[L2TP_ATTR_IP6_SADDR] &&
213 info->attrs[L2TP_ATTR_IP6_DADDR]) {
214 cfg.local_ip6 = nla_data(
215 info->attrs[L2TP_ATTR_IP6_SADDR]);
216 cfg.peer_ip6 = nla_data(
217 info->attrs[L2TP_ATTR_IP6_DADDR]);
220 if (info->attrs[L2TP_ATTR_IP_SADDR] &&
221 info->attrs[L2TP_ATTR_IP_DADDR]) {
222 cfg.local_ip.s_addr = nla_get_in_addr(
223 info->attrs[L2TP_ATTR_IP_SADDR]);
224 cfg.peer_ip.s_addr = nla_get_in_addr(
225 info->attrs[L2TP_ATTR_IP_DADDR]);
230 if (info->attrs[L2TP_ATTR_UDP_SPORT])
231 cfg.local_udp_port = nla_get_u16(info->attrs[L2TP_ATTR_UDP_SPORT]);
232 if (info->attrs[L2TP_ATTR_UDP_DPORT])
233 cfg.peer_udp_port = nla_get_u16(info->attrs[L2TP_ATTR_UDP_DPORT]);
234 if (info->attrs[L2TP_ATTR_UDP_CSUM])
235 cfg.use_udp_checksums = nla_get_flag(info->attrs[L2TP_ATTR_UDP_CSUM]);
237 #if IS_ENABLED(CONFIG_IPV6)
238 if (info->attrs[L2TP_ATTR_UDP_ZERO_CSUM6_TX])
239 cfg.udp6_zero_tx_checksums = nla_get_flag(info->attrs[L2TP_ATTR_UDP_ZERO_CSUM6_TX]);
240 if (info->attrs[L2TP_ATTR_UDP_ZERO_CSUM6_RX])
241 cfg.udp6_zero_rx_checksums = nla_get_flag(info->attrs[L2TP_ATTR_UDP_ZERO_CSUM6_RX]);
245 if (info->attrs[L2TP_ATTR_DEBUG])
246 cfg.debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]);
248 tunnel = l2tp_tunnel_find(net, tunnel_id);
249 if (tunnel != NULL) {
256 case L2TP_ENCAPTYPE_UDP:
257 case L2TP_ENCAPTYPE_IP:
258 ret = l2tp_tunnel_create(net, fd, proto_version, tunnel_id,
259 peer_tunnel_id, &cfg, &tunnel);
264 ret = l2tp_tunnel_notify(&l2tp_nl_family, info,
265 tunnel, L2TP_CMD_TUNNEL_CREATE);
270 static int l2tp_nl_cmd_tunnel_delete(struct sk_buff *skb, struct genl_info *info)
272 struct l2tp_tunnel *tunnel;
275 struct net *net = genl_info_net(info);
277 if (!info->attrs[L2TP_ATTR_CONN_ID]) {
281 tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
283 tunnel = l2tp_tunnel_get(net, tunnel_id);
289 l2tp_tunnel_notify(&l2tp_nl_family, info,
290 tunnel, L2TP_CMD_TUNNEL_DELETE);
292 l2tp_tunnel_delete(tunnel);
294 l2tp_tunnel_dec_refcount(tunnel);
300 static int l2tp_nl_cmd_tunnel_modify(struct sk_buff *skb, struct genl_info *info)
302 struct l2tp_tunnel *tunnel;
305 struct net *net = genl_info_net(info);
307 if (!info->attrs[L2TP_ATTR_CONN_ID]) {
311 tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
313 tunnel = l2tp_tunnel_get(net, tunnel_id);
319 if (info->attrs[L2TP_ATTR_DEBUG])
320 tunnel->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]);
322 ret = l2tp_tunnel_notify(&l2tp_nl_family, info,
323 tunnel, L2TP_CMD_TUNNEL_MODIFY);
325 l2tp_tunnel_dec_refcount(tunnel);
331 static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 portid, u32 seq, int flags,
332 struct l2tp_tunnel *tunnel, u8 cmd)
336 struct sock *sk = NULL;
337 struct inet_sock *inet;
338 #if IS_ENABLED(CONFIG_IPV6)
339 struct ipv6_pinfo *np = NULL;
342 hdr = genlmsg_put(skb, portid, seq, &l2tp_nl_family, flags, cmd);
346 if (nla_put_u8(skb, L2TP_ATTR_PROTO_VERSION, tunnel->version) ||
347 nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id) ||
348 nla_put_u32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id) ||
349 nla_put_u32(skb, L2TP_ATTR_DEBUG, tunnel->debug) ||
350 nla_put_u16(skb, L2TP_ATTR_ENCAP_TYPE, tunnel->encap))
351 goto nla_put_failure;
353 nest = nla_nest_start(skb, L2TP_ATTR_STATS);
355 goto nla_put_failure;
357 if (nla_put_u64_64bit(skb, L2TP_ATTR_TX_PACKETS,
358 atomic_long_read(&tunnel->stats.tx_packets),
359 L2TP_ATTR_STATS_PAD) ||
360 nla_put_u64_64bit(skb, L2TP_ATTR_TX_BYTES,
361 atomic_long_read(&tunnel->stats.tx_bytes),
362 L2TP_ATTR_STATS_PAD) ||
363 nla_put_u64_64bit(skb, L2TP_ATTR_TX_ERRORS,
364 atomic_long_read(&tunnel->stats.tx_errors),
365 L2TP_ATTR_STATS_PAD) ||
366 nla_put_u64_64bit(skb, L2TP_ATTR_RX_PACKETS,
367 atomic_long_read(&tunnel->stats.rx_packets),
368 L2TP_ATTR_STATS_PAD) ||
369 nla_put_u64_64bit(skb, L2TP_ATTR_RX_BYTES,
370 atomic_long_read(&tunnel->stats.rx_bytes),
371 L2TP_ATTR_STATS_PAD) ||
372 nla_put_u64_64bit(skb, L2TP_ATTR_RX_SEQ_DISCARDS,
373 atomic_long_read(&tunnel->stats.rx_seq_discards),
374 L2TP_ATTR_STATS_PAD) ||
375 nla_put_u64_64bit(skb, L2TP_ATTR_RX_OOS_PACKETS,
376 atomic_long_read(&tunnel->stats.rx_oos_packets),
377 L2TP_ATTR_STATS_PAD) ||
378 nla_put_u64_64bit(skb, L2TP_ATTR_RX_ERRORS,
379 atomic_long_read(&tunnel->stats.rx_errors),
380 L2TP_ATTR_STATS_PAD))
381 goto nla_put_failure;
382 nla_nest_end(skb, nest);
388 #if IS_ENABLED(CONFIG_IPV6)
389 if (sk->sk_family == AF_INET6)
395 switch (tunnel->encap) {
396 case L2TP_ENCAPTYPE_UDP:
397 if (nla_put_u16(skb, L2TP_ATTR_UDP_SPORT, ntohs(inet->inet_sport)) ||
398 nla_put_u16(skb, L2TP_ATTR_UDP_DPORT, ntohs(inet->inet_dport)) ||
399 nla_put_u8(skb, L2TP_ATTR_UDP_CSUM, !sk->sk_no_check_tx))
400 goto nla_put_failure;
402 case L2TP_ENCAPTYPE_IP:
403 #if IS_ENABLED(CONFIG_IPV6)
405 if (nla_put_in6_addr(skb, L2TP_ATTR_IP6_SADDR,
407 nla_put_in6_addr(skb, L2TP_ATTR_IP6_DADDR,
409 goto nla_put_failure;
412 if (nla_put_in_addr(skb, L2TP_ATTR_IP_SADDR,
414 nla_put_in_addr(skb, L2TP_ATTR_IP_DADDR,
416 goto nla_put_failure;
421 genlmsg_end(skb, hdr);
425 genlmsg_cancel(skb, hdr);
429 static int l2tp_nl_cmd_tunnel_get(struct sk_buff *skb, struct genl_info *info)
431 struct l2tp_tunnel *tunnel;
435 struct net *net = genl_info_net(info);
437 if (!info->attrs[L2TP_ATTR_CONN_ID]) {
442 tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
444 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
450 tunnel = l2tp_tunnel_get(net, tunnel_id);
456 ret = l2tp_nl_tunnel_send(msg, info->snd_portid, info->snd_seq,
457 NLM_F_ACK, tunnel, L2TP_CMD_TUNNEL_GET);
459 goto err_nlmsg_tunnel;
461 l2tp_tunnel_dec_refcount(tunnel);
463 return genlmsg_unicast(net, msg, info->snd_portid);
466 l2tp_tunnel_dec_refcount(tunnel);
473 static int l2tp_nl_cmd_tunnel_dump(struct sk_buff *skb, struct netlink_callback *cb)
475 int ti = cb->args[0];
476 struct l2tp_tunnel *tunnel;
477 struct net *net = sock_net(skb->sk);
480 tunnel = l2tp_tunnel_find_nth(net, ti);
484 if (l2tp_nl_tunnel_send(skb, NETLINK_CB(cb->skb).portid,
485 cb->nlh->nlmsg_seq, NLM_F_MULTI,
486 tunnel, L2TP_CMD_TUNNEL_GET) < 0)
498 static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *info)
504 struct l2tp_tunnel *tunnel;
505 struct l2tp_session *session;
506 struct l2tp_session_cfg cfg = { 0, };
507 struct net *net = genl_info_net(info);
509 if (!info->attrs[L2TP_ATTR_CONN_ID]) {
514 tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
515 tunnel = l2tp_tunnel_get(net, tunnel_id);
521 if (!info->attrs[L2TP_ATTR_SESSION_ID]) {
525 session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]);
527 if (!info->attrs[L2TP_ATTR_PEER_SESSION_ID]) {
531 peer_session_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_SESSION_ID]);
533 if (!info->attrs[L2TP_ATTR_PW_TYPE]) {
537 cfg.pw_type = nla_get_u16(info->attrs[L2TP_ATTR_PW_TYPE]);
538 if (cfg.pw_type >= __L2TP_PWTYPE_MAX) {
543 if (tunnel->version > 2) {
544 if (info->attrs[L2TP_ATTR_DATA_SEQ])
545 cfg.data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]);
547 cfg.l2specific_type = L2TP_L2SPECTYPE_DEFAULT;
548 if (info->attrs[L2TP_ATTR_L2SPEC_TYPE])
549 cfg.l2specific_type = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_TYPE]);
551 cfg.l2specific_len = 4;
552 if (info->attrs[L2TP_ATTR_L2SPEC_LEN])
553 cfg.l2specific_len = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_LEN]);
555 if (info->attrs[L2TP_ATTR_COOKIE]) {
556 u16 len = nla_len(info->attrs[L2TP_ATTR_COOKIE]);
561 cfg.cookie_len = len;
562 memcpy(&cfg.cookie[0], nla_data(info->attrs[L2TP_ATTR_COOKIE]), len);
564 if (info->attrs[L2TP_ATTR_PEER_COOKIE]) {
565 u16 len = nla_len(info->attrs[L2TP_ATTR_PEER_COOKIE]);
570 cfg.peer_cookie_len = len;
571 memcpy(&cfg.peer_cookie[0], nla_data(info->attrs[L2TP_ATTR_PEER_COOKIE]), len);
573 if (info->attrs[L2TP_ATTR_IFNAME])
574 cfg.ifname = nla_data(info->attrs[L2TP_ATTR_IFNAME]);
576 if (info->attrs[L2TP_ATTR_VLAN_ID])
577 cfg.vlan_id = nla_get_u16(info->attrs[L2TP_ATTR_VLAN_ID]);
580 if (info->attrs[L2TP_ATTR_DEBUG])
581 cfg.debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]);
583 if (info->attrs[L2TP_ATTR_RECV_SEQ])
584 cfg.recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]);
586 if (info->attrs[L2TP_ATTR_SEND_SEQ])
587 cfg.send_seq = nla_get_u8(info->attrs[L2TP_ATTR_SEND_SEQ]);
589 if (info->attrs[L2TP_ATTR_LNS_MODE])
590 cfg.lns_mode = nla_get_u8(info->attrs[L2TP_ATTR_LNS_MODE]);
592 if (info->attrs[L2TP_ATTR_RECV_TIMEOUT])
593 cfg.reorder_timeout = nla_get_msecs(info->attrs[L2TP_ATTR_RECV_TIMEOUT]);
595 if (info->attrs[L2TP_ATTR_MTU])
596 cfg.mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]);
598 if (info->attrs[L2TP_ATTR_MRU])
599 cfg.mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]);
601 #ifdef CONFIG_MODULES
602 if (l2tp_nl_cmd_ops[cfg.pw_type] == NULL) {
604 request_module("net-l2tp-type-%u", cfg.pw_type);
608 if ((l2tp_nl_cmd_ops[cfg.pw_type] == NULL) ||
609 (l2tp_nl_cmd_ops[cfg.pw_type]->session_create == NULL)) {
610 ret = -EPROTONOSUPPORT;
614 /* Check that pseudowire-specific params are present */
615 switch (cfg.pw_type) {
616 case L2TP_PWTYPE_NONE:
618 case L2TP_PWTYPE_ETH_VLAN:
619 if (!info->attrs[L2TP_ATTR_VLAN_ID]) {
624 case L2TP_PWTYPE_ETH:
626 case L2TP_PWTYPE_PPP:
627 case L2TP_PWTYPE_PPP_AC:
631 ret = -EPROTONOSUPPORT;
635 ret = l2tp_nl_cmd_ops[cfg.pw_type]->session_create(net, tunnel,
641 session = l2tp_session_get(net, tunnel, session_id, false);
643 ret = l2tp_session_notify(&l2tp_nl_family, info, session,
644 L2TP_CMD_SESSION_CREATE);
645 l2tp_session_dec_refcount(session);
650 l2tp_tunnel_dec_refcount(tunnel);
655 static int l2tp_nl_cmd_session_delete(struct sk_buff *skb, struct genl_info *info)
658 struct l2tp_session *session;
661 session = l2tp_nl_session_get(info, true);
662 if (session == NULL) {
667 l2tp_session_notify(&l2tp_nl_family, info,
668 session, L2TP_CMD_SESSION_DELETE);
670 pw_type = session->pwtype;
671 if (pw_type < __L2TP_PWTYPE_MAX)
672 if (l2tp_nl_cmd_ops[pw_type] && l2tp_nl_cmd_ops[pw_type]->session_delete)
673 ret = (*l2tp_nl_cmd_ops[pw_type]->session_delete)(session);
676 session->deref(session);
677 l2tp_session_dec_refcount(session);
683 static int l2tp_nl_cmd_session_modify(struct sk_buff *skb, struct genl_info *info)
686 struct l2tp_session *session;
688 session = l2tp_nl_session_get(info, false);
689 if (session == NULL) {
694 if (info->attrs[L2TP_ATTR_DEBUG])
695 session->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]);
697 if (info->attrs[L2TP_ATTR_DATA_SEQ])
698 session->data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]);
700 if (info->attrs[L2TP_ATTR_RECV_SEQ])
701 session->recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]);
703 if (info->attrs[L2TP_ATTR_SEND_SEQ]) {
704 session->send_seq = nla_get_u8(info->attrs[L2TP_ATTR_SEND_SEQ]);
705 l2tp_session_set_header_len(session, session->tunnel->version);
708 if (info->attrs[L2TP_ATTR_LNS_MODE])
709 session->lns_mode = nla_get_u8(info->attrs[L2TP_ATTR_LNS_MODE]);
711 if (info->attrs[L2TP_ATTR_RECV_TIMEOUT])
712 session->reorder_timeout = nla_get_msecs(info->attrs[L2TP_ATTR_RECV_TIMEOUT]);
714 if (info->attrs[L2TP_ATTR_MTU])
715 session->mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]);
717 if (info->attrs[L2TP_ATTR_MRU])
718 session->mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]);
720 ret = l2tp_session_notify(&l2tp_nl_family, info,
721 session, L2TP_CMD_SESSION_MODIFY);
723 l2tp_session_dec_refcount(session);
729 static int l2tp_nl_session_send(struct sk_buff *skb, u32 portid, u32 seq, int flags,
730 struct l2tp_session *session, u8 cmd)
734 struct l2tp_tunnel *tunnel = session->tunnel;
735 struct sock *sk = NULL;
739 hdr = genlmsg_put(skb, portid, seq, &l2tp_nl_family, flags, cmd);
743 if (nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id) ||
744 nla_put_u32(skb, L2TP_ATTR_SESSION_ID, session->session_id) ||
745 nla_put_u32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id) ||
746 nla_put_u32(skb, L2TP_ATTR_PEER_SESSION_ID,
747 session->peer_session_id) ||
748 nla_put_u32(skb, L2TP_ATTR_DEBUG, session->debug) ||
749 nla_put_u16(skb, L2TP_ATTR_PW_TYPE, session->pwtype) ||
750 nla_put_u16(skb, L2TP_ATTR_MTU, session->mtu) ||
752 nla_put_u16(skb, L2TP_ATTR_MRU, session->mru)))
753 goto nla_put_failure;
755 if ((session->ifname[0] &&
756 nla_put_string(skb, L2TP_ATTR_IFNAME, session->ifname)) ||
757 (session->cookie_len &&
758 nla_put(skb, L2TP_ATTR_COOKIE, session->cookie_len,
759 &session->cookie[0])) ||
760 (session->peer_cookie_len &&
761 nla_put(skb, L2TP_ATTR_PEER_COOKIE, session->peer_cookie_len,
762 &session->peer_cookie[0])) ||
763 nla_put_u8(skb, L2TP_ATTR_RECV_SEQ, session->recv_seq) ||
764 nla_put_u8(skb, L2TP_ATTR_SEND_SEQ, session->send_seq) ||
765 nla_put_u8(skb, L2TP_ATTR_LNS_MODE, session->lns_mode) ||
767 (((sk) && (sk->sk_policy[0] || sk->sk_policy[1])) &&
768 nla_put_u8(skb, L2TP_ATTR_USING_IPSEC, 1)) ||
770 (session->reorder_timeout &&
771 nla_put_msecs(skb, L2TP_ATTR_RECV_TIMEOUT,
772 session->reorder_timeout, L2TP_ATTR_PAD)))
773 goto nla_put_failure;
775 nest = nla_nest_start(skb, L2TP_ATTR_STATS);
777 goto nla_put_failure;
779 if (nla_put_u64_64bit(skb, L2TP_ATTR_TX_PACKETS,
780 atomic_long_read(&session->stats.tx_packets),
781 L2TP_ATTR_STATS_PAD) ||
782 nla_put_u64_64bit(skb, L2TP_ATTR_TX_BYTES,
783 atomic_long_read(&session->stats.tx_bytes),
784 L2TP_ATTR_STATS_PAD) ||
785 nla_put_u64_64bit(skb, L2TP_ATTR_TX_ERRORS,
786 atomic_long_read(&session->stats.tx_errors),
787 L2TP_ATTR_STATS_PAD) ||
788 nla_put_u64_64bit(skb, L2TP_ATTR_RX_PACKETS,
789 atomic_long_read(&session->stats.rx_packets),
790 L2TP_ATTR_STATS_PAD) ||
791 nla_put_u64_64bit(skb, L2TP_ATTR_RX_BYTES,
792 atomic_long_read(&session->stats.rx_bytes),
793 L2TP_ATTR_STATS_PAD) ||
794 nla_put_u64_64bit(skb, L2TP_ATTR_RX_SEQ_DISCARDS,
795 atomic_long_read(&session->stats.rx_seq_discards),
796 L2TP_ATTR_STATS_PAD) ||
797 nla_put_u64_64bit(skb, L2TP_ATTR_RX_OOS_PACKETS,
798 atomic_long_read(&session->stats.rx_oos_packets),
799 L2TP_ATTR_STATS_PAD) ||
800 nla_put_u64_64bit(skb, L2TP_ATTR_RX_ERRORS,
801 atomic_long_read(&session->stats.rx_errors),
802 L2TP_ATTR_STATS_PAD))
803 goto nla_put_failure;
804 nla_nest_end(skb, nest);
806 genlmsg_end(skb, hdr);
810 genlmsg_cancel(skb, hdr);
814 static int l2tp_nl_cmd_session_get(struct sk_buff *skb, struct genl_info *info)
816 struct l2tp_session *session;
820 session = l2tp_nl_session_get(info, false);
821 if (session == NULL) {
826 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
832 ret = l2tp_nl_session_send(msg, info->snd_portid, info->snd_seq,
833 0, session, L2TP_CMD_SESSION_GET);
837 ret = genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
839 l2tp_session_dec_refcount(session);
846 l2tp_session_dec_refcount(session);
851 static int l2tp_nl_cmd_session_dump(struct sk_buff *skb, struct netlink_callback *cb)
853 struct net *net = sock_net(skb->sk);
854 struct l2tp_session *session;
855 struct l2tp_tunnel *tunnel = NULL;
856 int ti = cb->args[0];
857 int si = cb->args[1];
860 if (tunnel == NULL) {
861 tunnel = l2tp_tunnel_find_nth(net, ti);
866 session = l2tp_session_get_nth(tunnel, si, false);
867 if (session == NULL) {
874 if (l2tp_nl_session_send(skb, NETLINK_CB(cb->skb).portid,
875 cb->nlh->nlmsg_seq, NLM_F_MULTI,
876 session, L2TP_CMD_SESSION_GET) < 0) {
877 l2tp_session_dec_refcount(session);
880 l2tp_session_dec_refcount(session);
892 static const struct nla_policy l2tp_nl_policy[L2TP_ATTR_MAX + 1] = {
893 [L2TP_ATTR_NONE] = { .type = NLA_UNSPEC, },
894 [L2TP_ATTR_PW_TYPE] = { .type = NLA_U16, },
895 [L2TP_ATTR_ENCAP_TYPE] = { .type = NLA_U16, },
896 [L2TP_ATTR_OFFSET] = { .type = NLA_U16, },
897 [L2TP_ATTR_DATA_SEQ] = { .type = NLA_U8, },
898 [L2TP_ATTR_L2SPEC_TYPE] = { .type = NLA_U8, },
899 [L2TP_ATTR_L2SPEC_LEN] = { .type = NLA_U8, },
900 [L2TP_ATTR_PROTO_VERSION] = { .type = NLA_U8, },
901 [L2TP_ATTR_CONN_ID] = { .type = NLA_U32, },
902 [L2TP_ATTR_PEER_CONN_ID] = { .type = NLA_U32, },
903 [L2TP_ATTR_SESSION_ID] = { .type = NLA_U32, },
904 [L2TP_ATTR_PEER_SESSION_ID] = { .type = NLA_U32, },
905 [L2TP_ATTR_UDP_CSUM] = { .type = NLA_U8, },
906 [L2TP_ATTR_VLAN_ID] = { .type = NLA_U16, },
907 [L2TP_ATTR_DEBUG] = { .type = NLA_U32, },
908 [L2TP_ATTR_RECV_SEQ] = { .type = NLA_U8, },
909 [L2TP_ATTR_SEND_SEQ] = { .type = NLA_U8, },
910 [L2TP_ATTR_LNS_MODE] = { .type = NLA_U8, },
911 [L2TP_ATTR_USING_IPSEC] = { .type = NLA_U8, },
912 [L2TP_ATTR_RECV_TIMEOUT] = { .type = NLA_MSECS, },
913 [L2TP_ATTR_FD] = { .type = NLA_U32, },
914 [L2TP_ATTR_IP_SADDR] = { .type = NLA_U32, },
915 [L2TP_ATTR_IP_DADDR] = { .type = NLA_U32, },
916 [L2TP_ATTR_UDP_SPORT] = { .type = NLA_U16, },
917 [L2TP_ATTR_UDP_DPORT] = { .type = NLA_U16, },
918 [L2TP_ATTR_MTU] = { .type = NLA_U16, },
919 [L2TP_ATTR_MRU] = { .type = NLA_U16, },
920 [L2TP_ATTR_STATS] = { .type = NLA_NESTED, },
921 [L2TP_ATTR_IP6_SADDR] = {
923 .len = sizeof(struct in6_addr),
925 [L2TP_ATTR_IP6_DADDR] = {
927 .len = sizeof(struct in6_addr),
929 [L2TP_ATTR_IFNAME] = {
930 .type = NLA_NUL_STRING,
933 [L2TP_ATTR_COOKIE] = {
937 [L2TP_ATTR_PEER_COOKIE] = {
943 static const struct genl_ops l2tp_nl_ops[] = {
945 .cmd = L2TP_CMD_NOOP,
946 .doit = l2tp_nl_cmd_noop,
947 .policy = l2tp_nl_policy,
948 /* can be retrieved by unprivileged users */
951 .cmd = L2TP_CMD_TUNNEL_CREATE,
952 .doit = l2tp_nl_cmd_tunnel_create,
953 .policy = l2tp_nl_policy,
954 .flags = GENL_ADMIN_PERM,
957 .cmd = L2TP_CMD_TUNNEL_DELETE,
958 .doit = l2tp_nl_cmd_tunnel_delete,
959 .policy = l2tp_nl_policy,
960 .flags = GENL_ADMIN_PERM,
963 .cmd = L2TP_CMD_TUNNEL_MODIFY,
964 .doit = l2tp_nl_cmd_tunnel_modify,
965 .policy = l2tp_nl_policy,
966 .flags = GENL_ADMIN_PERM,
969 .cmd = L2TP_CMD_TUNNEL_GET,
970 .doit = l2tp_nl_cmd_tunnel_get,
971 .dumpit = l2tp_nl_cmd_tunnel_dump,
972 .policy = l2tp_nl_policy,
973 .flags = GENL_ADMIN_PERM,
976 .cmd = L2TP_CMD_SESSION_CREATE,
977 .doit = l2tp_nl_cmd_session_create,
978 .policy = l2tp_nl_policy,
979 .flags = GENL_ADMIN_PERM,
982 .cmd = L2TP_CMD_SESSION_DELETE,
983 .doit = l2tp_nl_cmd_session_delete,
984 .policy = l2tp_nl_policy,
985 .flags = GENL_ADMIN_PERM,
988 .cmd = L2TP_CMD_SESSION_MODIFY,
989 .doit = l2tp_nl_cmd_session_modify,
990 .policy = l2tp_nl_policy,
991 .flags = GENL_ADMIN_PERM,
994 .cmd = L2TP_CMD_SESSION_GET,
995 .doit = l2tp_nl_cmd_session_get,
996 .dumpit = l2tp_nl_cmd_session_dump,
997 .policy = l2tp_nl_policy,
998 .flags = GENL_ADMIN_PERM,
1002 int l2tp_nl_register_ops(enum l2tp_pwtype pw_type, const struct l2tp_nl_cmd_ops *ops)
1007 if (pw_type >= __L2TP_PWTYPE_MAX)
1012 if (l2tp_nl_cmd_ops[pw_type])
1015 l2tp_nl_cmd_ops[pw_type] = ops;
1023 EXPORT_SYMBOL_GPL(l2tp_nl_register_ops);
1025 void l2tp_nl_unregister_ops(enum l2tp_pwtype pw_type)
1027 if (pw_type < __L2TP_PWTYPE_MAX) {
1029 l2tp_nl_cmd_ops[pw_type] = NULL;
1033 EXPORT_SYMBOL_GPL(l2tp_nl_unregister_ops);
1035 static int l2tp_nl_init(void)
1037 pr_info("L2TP netlink interface\n");
1038 return genl_register_family_with_ops_groups(&l2tp_nl_family,
1040 l2tp_multicast_group);
1043 static void l2tp_nl_cleanup(void)
1045 genl_unregister_family(&l2tp_nl_family);
1048 module_init(l2tp_nl_init);
1049 module_exit(l2tp_nl_cleanup);
1051 MODULE_AUTHOR("James Chapman <jchapman@katalix.com>");
1052 MODULE_DESCRIPTION("L2TP netlink");
1053 MODULE_LICENSE("GPL");
1054 MODULE_VERSION("1.0");
1055 MODULE_ALIAS_GENL_FAMILY("l2tp");