James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 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 | |
Joe Perches | a4ca44f | 2012-05-16 09:55:56 +0000 | [diff] [blame] | 17 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 18 | |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 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, |
| 40 | }; |
| 41 | |
| 42 | /* Accessed under genl lock */ |
| 43 | static const struct l2tp_nl_cmd_ops *l2tp_nl_cmd_ops[__L2TP_PWTYPE_MAX]; |
| 44 | |
| 45 | static struct l2tp_session *l2tp_nl_session_find(struct genl_info *info) |
| 46 | { |
| 47 | u32 tunnel_id; |
| 48 | u32 session_id; |
| 49 | char *ifname; |
| 50 | struct l2tp_tunnel *tunnel; |
| 51 | struct l2tp_session *session = NULL; |
| 52 | struct net *net = genl_info_net(info); |
| 53 | |
| 54 | if (info->attrs[L2TP_ATTR_IFNAME]) { |
| 55 | ifname = nla_data(info->attrs[L2TP_ATTR_IFNAME]); |
| 56 | session = l2tp_session_find_by_ifname(net, ifname); |
| 57 | } else if ((info->attrs[L2TP_ATTR_SESSION_ID]) && |
| 58 | (info->attrs[L2TP_ATTR_CONN_ID])) { |
| 59 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); |
| 60 | session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]); |
| 61 | tunnel = l2tp_tunnel_find(net, tunnel_id); |
| 62 | if (tunnel) |
| 63 | session = l2tp_session_find(net, tunnel, session_id); |
| 64 | } |
| 65 | |
| 66 | return session; |
| 67 | } |
| 68 | |
| 69 | static int l2tp_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info) |
| 70 | { |
| 71 | struct sk_buff *msg; |
| 72 | void *hdr; |
| 73 | int ret = -ENOBUFS; |
| 74 | |
Thomas Graf | 58050fc | 2012-06-28 03:57:45 +0000 | [diff] [blame] | 75 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 76 | if (!msg) { |
| 77 | ret = -ENOMEM; |
| 78 | goto out; |
| 79 | } |
| 80 | |
| 81 | hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq, |
| 82 | &l2tp_nl_family, 0, L2TP_CMD_NOOP); |
| 83 | if (IS_ERR(hdr)) { |
| 84 | ret = PTR_ERR(hdr); |
| 85 | goto err_out; |
| 86 | } |
| 87 | |
| 88 | genlmsg_end(msg, hdr); |
| 89 | |
| 90 | return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid); |
| 91 | |
| 92 | err_out: |
| 93 | nlmsg_free(msg); |
| 94 | |
| 95 | out: |
| 96 | return ret; |
| 97 | } |
| 98 | |
| 99 | static int l2tp_nl_cmd_tunnel_create(struct sk_buff *skb, struct genl_info *info) |
| 100 | { |
| 101 | u32 tunnel_id; |
| 102 | u32 peer_tunnel_id; |
| 103 | int proto_version; |
| 104 | int fd; |
| 105 | int ret = 0; |
| 106 | struct l2tp_tunnel_cfg cfg = { 0, }; |
| 107 | struct l2tp_tunnel *tunnel; |
| 108 | struct net *net = genl_info_net(info); |
| 109 | |
| 110 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { |
| 111 | ret = -EINVAL; |
| 112 | goto out; |
| 113 | } |
| 114 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); |
| 115 | |
| 116 | if (!info->attrs[L2TP_ATTR_PEER_CONN_ID]) { |
| 117 | ret = -EINVAL; |
| 118 | goto out; |
| 119 | } |
| 120 | peer_tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_CONN_ID]); |
| 121 | |
| 122 | if (!info->attrs[L2TP_ATTR_PROTO_VERSION]) { |
| 123 | ret = -EINVAL; |
| 124 | goto out; |
| 125 | } |
| 126 | proto_version = nla_get_u8(info->attrs[L2TP_ATTR_PROTO_VERSION]); |
| 127 | |
| 128 | if (!info->attrs[L2TP_ATTR_ENCAP_TYPE]) { |
| 129 | ret = -EINVAL; |
| 130 | goto out; |
| 131 | } |
| 132 | cfg.encap = nla_get_u16(info->attrs[L2TP_ATTR_ENCAP_TYPE]); |
| 133 | |
James Chapman | 789a4a2 | 2010-04-02 06:19:40 +0000 | [diff] [blame] | 134 | fd = -1; |
| 135 | if (info->attrs[L2TP_ATTR_FD]) { |
| 136 | fd = nla_get_u32(info->attrs[L2TP_ATTR_FD]); |
| 137 | } else { |
Chris Elston | f9bac8d | 2012-04-29 21:48:52 +0000 | [diff] [blame] | 138 | #if IS_ENABLED(CONFIG_IPV6) |
| 139 | if (info->attrs[L2TP_ATTR_IP6_SADDR] && |
| 140 | info->attrs[L2TP_ATTR_IP6_DADDR]) { |
| 141 | cfg.local_ip6 = nla_data( |
| 142 | info->attrs[L2TP_ATTR_IP6_SADDR]); |
| 143 | cfg.peer_ip6 = nla_data( |
| 144 | info->attrs[L2TP_ATTR_IP6_DADDR]); |
| 145 | } else |
| 146 | #endif |
| 147 | if (info->attrs[L2TP_ATTR_IP_SADDR] && |
| 148 | info->attrs[L2TP_ATTR_IP_DADDR]) { |
| 149 | cfg.local_ip.s_addr = nla_get_be32( |
| 150 | info->attrs[L2TP_ATTR_IP_SADDR]); |
| 151 | cfg.peer_ip.s_addr = nla_get_be32( |
| 152 | info->attrs[L2TP_ATTR_IP_DADDR]); |
| 153 | } else { |
| 154 | ret = -EINVAL; |
| 155 | goto out; |
| 156 | } |
James Chapman | 789a4a2 | 2010-04-02 06:19:40 +0000 | [diff] [blame] | 157 | if (info->attrs[L2TP_ATTR_UDP_SPORT]) |
| 158 | cfg.local_udp_port = nla_get_u16(info->attrs[L2TP_ATTR_UDP_SPORT]); |
| 159 | if (info->attrs[L2TP_ATTR_UDP_DPORT]) |
| 160 | cfg.peer_udp_port = nla_get_u16(info->attrs[L2TP_ATTR_UDP_DPORT]); |
| 161 | if (info->attrs[L2TP_ATTR_UDP_CSUM]) |
| 162 | cfg.use_udp_checksums = nla_get_flag(info->attrs[L2TP_ATTR_UDP_CSUM]); |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 163 | } |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 164 | |
| 165 | if (info->attrs[L2TP_ATTR_DEBUG]) |
| 166 | cfg.debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); |
| 167 | |
| 168 | tunnel = l2tp_tunnel_find(net, tunnel_id); |
| 169 | if (tunnel != NULL) { |
| 170 | ret = -EEXIST; |
| 171 | goto out; |
| 172 | } |
| 173 | |
| 174 | ret = -EINVAL; |
| 175 | switch (cfg.encap) { |
| 176 | case L2TP_ENCAPTYPE_UDP: |
| 177 | case L2TP_ENCAPTYPE_IP: |
| 178 | ret = l2tp_tunnel_create(net, fd, proto_version, tunnel_id, |
| 179 | peer_tunnel_id, &cfg, &tunnel); |
| 180 | break; |
| 181 | } |
| 182 | |
| 183 | out: |
| 184 | return ret; |
| 185 | } |
| 186 | |
| 187 | static int l2tp_nl_cmd_tunnel_delete(struct sk_buff *skb, struct genl_info *info) |
| 188 | { |
| 189 | struct l2tp_tunnel *tunnel; |
| 190 | u32 tunnel_id; |
| 191 | int ret = 0; |
| 192 | struct net *net = genl_info_net(info); |
| 193 | |
| 194 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { |
| 195 | ret = -EINVAL; |
| 196 | goto out; |
| 197 | } |
| 198 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); |
| 199 | |
| 200 | tunnel = l2tp_tunnel_find(net, tunnel_id); |
| 201 | if (tunnel == NULL) { |
| 202 | ret = -ENODEV; |
| 203 | goto out; |
| 204 | } |
| 205 | |
| 206 | (void) l2tp_tunnel_delete(tunnel); |
| 207 | |
| 208 | out: |
| 209 | return ret; |
| 210 | } |
| 211 | |
| 212 | static int l2tp_nl_cmd_tunnel_modify(struct sk_buff *skb, struct genl_info *info) |
| 213 | { |
| 214 | struct l2tp_tunnel *tunnel; |
| 215 | u32 tunnel_id; |
| 216 | int ret = 0; |
| 217 | struct net *net = genl_info_net(info); |
| 218 | |
| 219 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { |
| 220 | ret = -EINVAL; |
| 221 | goto out; |
| 222 | } |
| 223 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); |
| 224 | |
| 225 | tunnel = l2tp_tunnel_find(net, tunnel_id); |
| 226 | if (tunnel == NULL) { |
| 227 | ret = -ENODEV; |
| 228 | goto out; |
| 229 | } |
| 230 | |
| 231 | if (info->attrs[L2TP_ATTR_DEBUG]) |
| 232 | tunnel->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); |
| 233 | |
| 234 | out: |
| 235 | return ret; |
| 236 | } |
| 237 | |
| 238 | static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 pid, u32 seq, int flags, |
| 239 | struct l2tp_tunnel *tunnel) |
| 240 | { |
| 241 | void *hdr; |
| 242 | struct nlattr *nest; |
| 243 | struct sock *sk = NULL; |
| 244 | struct inet_sock *inet; |
Chris Elston | f9bac8d | 2012-04-29 21:48:52 +0000 | [diff] [blame] | 245 | #if IS_ENABLED(CONFIG_IPV6) |
| 246 | struct ipv6_pinfo *np = NULL; |
| 247 | #endif |
James Chapman | 5de7aee | 2012-04-29 21:48:46 +0000 | [diff] [blame] | 248 | struct l2tp_stats stats; |
| 249 | unsigned int start; |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 250 | |
| 251 | hdr = genlmsg_put(skb, pid, seq, &l2tp_nl_family, flags, |
| 252 | L2TP_CMD_TUNNEL_GET); |
| 253 | if (IS_ERR(hdr)) |
| 254 | return PTR_ERR(hdr); |
| 255 | |
David S. Miller | 60aed2a | 2012-04-01 19:59:31 -0400 | [diff] [blame] | 256 | if (nla_put_u8(skb, L2TP_ATTR_PROTO_VERSION, tunnel->version) || |
| 257 | nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id) || |
| 258 | nla_put_u32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id) || |
| 259 | nla_put_u32(skb, L2TP_ATTR_DEBUG, tunnel->debug) || |
| 260 | nla_put_u16(skb, L2TP_ATTR_ENCAP_TYPE, tunnel->encap)) |
| 261 | goto nla_put_failure; |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 262 | |
| 263 | nest = nla_nest_start(skb, L2TP_ATTR_STATS); |
| 264 | if (nest == NULL) |
| 265 | goto nla_put_failure; |
| 266 | |
James Chapman | 5de7aee | 2012-04-29 21:48:46 +0000 | [diff] [blame] | 267 | do { |
| 268 | start = u64_stats_fetch_begin(&tunnel->stats.syncp); |
| 269 | stats.tx_packets = tunnel->stats.tx_packets; |
| 270 | stats.tx_bytes = tunnel->stats.tx_bytes; |
| 271 | stats.tx_errors = tunnel->stats.tx_errors; |
| 272 | stats.rx_packets = tunnel->stats.rx_packets; |
| 273 | stats.rx_bytes = tunnel->stats.rx_bytes; |
| 274 | stats.rx_errors = tunnel->stats.rx_errors; |
| 275 | stats.rx_seq_discards = tunnel->stats.rx_seq_discards; |
| 276 | stats.rx_oos_packets = tunnel->stats.rx_oos_packets; |
| 277 | } while (u64_stats_fetch_retry(&tunnel->stats.syncp, start)); |
| 278 | |
| 279 | if (nla_put_u64(skb, L2TP_ATTR_TX_PACKETS, stats.tx_packets) || |
| 280 | nla_put_u64(skb, L2TP_ATTR_TX_BYTES, stats.tx_bytes) || |
| 281 | nla_put_u64(skb, L2TP_ATTR_TX_ERRORS, stats.tx_errors) || |
| 282 | nla_put_u64(skb, L2TP_ATTR_RX_PACKETS, stats.rx_packets) || |
| 283 | nla_put_u64(skb, L2TP_ATTR_RX_BYTES, stats.rx_bytes) || |
David S. Miller | 60aed2a | 2012-04-01 19:59:31 -0400 | [diff] [blame] | 284 | nla_put_u64(skb, L2TP_ATTR_RX_SEQ_DISCARDS, |
James Chapman | 5de7aee | 2012-04-29 21:48:46 +0000 | [diff] [blame] | 285 | stats.rx_seq_discards) || |
David S. Miller | 60aed2a | 2012-04-01 19:59:31 -0400 | [diff] [blame] | 286 | nla_put_u64(skb, L2TP_ATTR_RX_OOS_PACKETS, |
James Chapman | 5de7aee | 2012-04-29 21:48:46 +0000 | [diff] [blame] | 287 | stats.rx_oos_packets) || |
| 288 | nla_put_u64(skb, L2TP_ATTR_RX_ERRORS, stats.rx_errors)) |
David S. Miller | 60aed2a | 2012-04-01 19:59:31 -0400 | [diff] [blame] | 289 | goto nla_put_failure; |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 290 | nla_nest_end(skb, nest); |
| 291 | |
| 292 | sk = tunnel->sock; |
| 293 | if (!sk) |
| 294 | goto out; |
| 295 | |
Chris Elston | f9bac8d | 2012-04-29 21:48:52 +0000 | [diff] [blame] | 296 | #if IS_ENABLED(CONFIG_IPV6) |
| 297 | if (sk->sk_family == AF_INET6) |
| 298 | np = inet6_sk(sk); |
| 299 | #endif |
| 300 | |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 301 | inet = inet_sk(sk); |
| 302 | |
| 303 | switch (tunnel->encap) { |
| 304 | case L2TP_ENCAPTYPE_UDP: |
David S. Miller | 60aed2a | 2012-04-01 19:59:31 -0400 | [diff] [blame] | 305 | if (nla_put_u16(skb, L2TP_ATTR_UDP_SPORT, ntohs(inet->inet_sport)) || |
| 306 | nla_put_u16(skb, L2TP_ATTR_UDP_DPORT, ntohs(inet->inet_dport)) || |
| 307 | nla_put_u8(skb, L2TP_ATTR_UDP_CSUM, |
| 308 | (sk->sk_no_check != UDP_CSUM_NOXMIT))) |
| 309 | goto nla_put_failure; |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 310 | /* NOBREAK */ |
| 311 | case L2TP_ENCAPTYPE_IP: |
Chris Elston | f9bac8d | 2012-04-29 21:48:52 +0000 | [diff] [blame] | 312 | #if IS_ENABLED(CONFIG_IPV6) |
| 313 | if (np) { |
| 314 | if (nla_put(skb, L2TP_ATTR_IP6_SADDR, sizeof(np->saddr), |
| 315 | &np->saddr) || |
| 316 | nla_put(skb, L2TP_ATTR_IP6_DADDR, sizeof(np->daddr), |
| 317 | &np->daddr)) |
| 318 | goto nla_put_failure; |
| 319 | } else |
| 320 | #endif |
David S. Miller | 60aed2a | 2012-04-01 19:59:31 -0400 | [diff] [blame] | 321 | if (nla_put_be32(skb, L2TP_ATTR_IP_SADDR, inet->inet_saddr) || |
| 322 | nla_put_be32(skb, L2TP_ATTR_IP_DADDR, inet->inet_daddr)) |
| 323 | goto nla_put_failure; |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 324 | break; |
| 325 | } |
| 326 | |
| 327 | out: |
| 328 | return genlmsg_end(skb, hdr); |
| 329 | |
| 330 | nla_put_failure: |
| 331 | genlmsg_cancel(skb, hdr); |
| 332 | return -1; |
| 333 | } |
| 334 | |
| 335 | static int l2tp_nl_cmd_tunnel_get(struct sk_buff *skb, struct genl_info *info) |
| 336 | { |
| 337 | struct l2tp_tunnel *tunnel; |
| 338 | struct sk_buff *msg; |
| 339 | u32 tunnel_id; |
| 340 | int ret = -ENOBUFS; |
| 341 | struct net *net = genl_info_net(info); |
| 342 | |
| 343 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { |
| 344 | ret = -EINVAL; |
| 345 | goto out; |
| 346 | } |
| 347 | |
| 348 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); |
| 349 | |
| 350 | tunnel = l2tp_tunnel_find(net, tunnel_id); |
| 351 | if (tunnel == NULL) { |
| 352 | ret = -ENODEV; |
| 353 | goto out; |
| 354 | } |
| 355 | |
Thomas Graf | 58050fc | 2012-06-28 03:57:45 +0000 | [diff] [blame] | 356 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 357 | if (!msg) { |
| 358 | ret = -ENOMEM; |
| 359 | goto out; |
| 360 | } |
| 361 | |
| 362 | ret = l2tp_nl_tunnel_send(msg, info->snd_pid, info->snd_seq, |
| 363 | NLM_F_ACK, tunnel); |
| 364 | if (ret < 0) |
| 365 | goto err_out; |
| 366 | |
| 367 | return genlmsg_unicast(net, msg, info->snd_pid); |
| 368 | |
| 369 | err_out: |
| 370 | nlmsg_free(msg); |
| 371 | |
| 372 | out: |
| 373 | return ret; |
| 374 | } |
| 375 | |
| 376 | static int l2tp_nl_cmd_tunnel_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 377 | { |
| 378 | int ti = cb->args[0]; |
| 379 | struct l2tp_tunnel *tunnel; |
| 380 | struct net *net = sock_net(skb->sk); |
| 381 | |
| 382 | for (;;) { |
| 383 | tunnel = l2tp_tunnel_find_nth(net, ti); |
| 384 | if (tunnel == NULL) |
| 385 | goto out; |
| 386 | |
| 387 | if (l2tp_nl_tunnel_send(skb, NETLINK_CB(cb->skb).pid, |
| 388 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
| 389 | tunnel) <= 0) |
| 390 | goto out; |
| 391 | |
| 392 | ti++; |
| 393 | } |
| 394 | |
| 395 | out: |
| 396 | cb->args[0] = ti; |
| 397 | |
| 398 | return skb->len; |
| 399 | } |
| 400 | |
| 401 | static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *info) |
| 402 | { |
| 403 | u32 tunnel_id = 0; |
| 404 | u32 session_id; |
| 405 | u32 peer_session_id; |
| 406 | int ret = 0; |
| 407 | struct l2tp_tunnel *tunnel; |
| 408 | struct l2tp_session *session; |
| 409 | struct l2tp_session_cfg cfg = { 0, }; |
| 410 | struct net *net = genl_info_net(info); |
| 411 | |
| 412 | if (!info->attrs[L2TP_ATTR_CONN_ID]) { |
| 413 | ret = -EINVAL; |
| 414 | goto out; |
| 415 | } |
| 416 | tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); |
| 417 | tunnel = l2tp_tunnel_find(net, tunnel_id); |
| 418 | if (!tunnel) { |
| 419 | ret = -ENODEV; |
| 420 | goto out; |
| 421 | } |
| 422 | |
| 423 | if (!info->attrs[L2TP_ATTR_SESSION_ID]) { |
| 424 | ret = -EINVAL; |
| 425 | goto out; |
| 426 | } |
| 427 | session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]); |
| 428 | session = l2tp_session_find(net, tunnel, session_id); |
| 429 | if (session) { |
| 430 | ret = -EEXIST; |
| 431 | goto out; |
| 432 | } |
| 433 | |
| 434 | if (!info->attrs[L2TP_ATTR_PEER_SESSION_ID]) { |
| 435 | ret = -EINVAL; |
| 436 | goto out; |
| 437 | } |
| 438 | peer_session_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_SESSION_ID]); |
| 439 | |
| 440 | if (!info->attrs[L2TP_ATTR_PW_TYPE]) { |
| 441 | ret = -EINVAL; |
| 442 | goto out; |
| 443 | } |
| 444 | cfg.pw_type = nla_get_u16(info->attrs[L2TP_ATTR_PW_TYPE]); |
| 445 | if (cfg.pw_type >= __L2TP_PWTYPE_MAX) { |
| 446 | ret = -EINVAL; |
| 447 | goto out; |
| 448 | } |
| 449 | |
| 450 | if (tunnel->version > 2) { |
| 451 | if (info->attrs[L2TP_ATTR_OFFSET]) |
| 452 | cfg.offset = nla_get_u16(info->attrs[L2TP_ATTR_OFFSET]); |
| 453 | |
| 454 | if (info->attrs[L2TP_ATTR_DATA_SEQ]) |
| 455 | cfg.data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]); |
| 456 | |
| 457 | cfg.l2specific_type = L2TP_L2SPECTYPE_DEFAULT; |
| 458 | if (info->attrs[L2TP_ATTR_L2SPEC_TYPE]) |
| 459 | cfg.l2specific_type = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_TYPE]); |
| 460 | |
| 461 | cfg.l2specific_len = 4; |
| 462 | if (info->attrs[L2TP_ATTR_L2SPEC_LEN]) |
| 463 | cfg.l2specific_len = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_LEN]); |
| 464 | |
| 465 | if (info->attrs[L2TP_ATTR_COOKIE]) { |
| 466 | u16 len = nla_len(info->attrs[L2TP_ATTR_COOKIE]); |
| 467 | if (len > 8) { |
| 468 | ret = -EINVAL; |
| 469 | goto out; |
| 470 | } |
| 471 | cfg.cookie_len = len; |
| 472 | memcpy(&cfg.cookie[0], nla_data(info->attrs[L2TP_ATTR_COOKIE]), len); |
| 473 | } |
| 474 | if (info->attrs[L2TP_ATTR_PEER_COOKIE]) { |
| 475 | u16 len = nla_len(info->attrs[L2TP_ATTR_PEER_COOKIE]); |
| 476 | if (len > 8) { |
| 477 | ret = -EINVAL; |
| 478 | goto out; |
| 479 | } |
| 480 | cfg.peer_cookie_len = len; |
| 481 | memcpy(&cfg.peer_cookie[0], nla_data(info->attrs[L2TP_ATTR_PEER_COOKIE]), len); |
| 482 | } |
| 483 | if (info->attrs[L2TP_ATTR_IFNAME]) |
| 484 | cfg.ifname = nla_data(info->attrs[L2TP_ATTR_IFNAME]); |
| 485 | |
| 486 | if (info->attrs[L2TP_ATTR_VLAN_ID]) |
| 487 | cfg.vlan_id = nla_get_u16(info->attrs[L2TP_ATTR_VLAN_ID]); |
| 488 | } |
| 489 | |
| 490 | if (info->attrs[L2TP_ATTR_DEBUG]) |
| 491 | cfg.debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); |
| 492 | |
| 493 | if (info->attrs[L2TP_ATTR_RECV_SEQ]) |
| 494 | cfg.recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]); |
| 495 | |
| 496 | if (info->attrs[L2TP_ATTR_SEND_SEQ]) |
| 497 | cfg.send_seq = nla_get_u8(info->attrs[L2TP_ATTR_SEND_SEQ]); |
| 498 | |
| 499 | if (info->attrs[L2TP_ATTR_LNS_MODE]) |
| 500 | cfg.lns_mode = nla_get_u8(info->attrs[L2TP_ATTR_LNS_MODE]); |
| 501 | |
| 502 | if (info->attrs[L2TP_ATTR_RECV_TIMEOUT]) |
| 503 | cfg.reorder_timeout = nla_get_msecs(info->attrs[L2TP_ATTR_RECV_TIMEOUT]); |
| 504 | |
| 505 | if (info->attrs[L2TP_ATTR_MTU]) |
| 506 | cfg.mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]); |
| 507 | |
| 508 | if (info->attrs[L2TP_ATTR_MRU]) |
| 509 | cfg.mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]); |
| 510 | |
| 511 | if ((l2tp_nl_cmd_ops[cfg.pw_type] == NULL) || |
| 512 | (l2tp_nl_cmd_ops[cfg.pw_type]->session_create == NULL)) { |
| 513 | ret = -EPROTONOSUPPORT; |
| 514 | goto out; |
| 515 | } |
| 516 | |
| 517 | /* Check that pseudowire-specific params are present */ |
| 518 | switch (cfg.pw_type) { |
| 519 | case L2TP_PWTYPE_NONE: |
| 520 | break; |
| 521 | case L2TP_PWTYPE_ETH_VLAN: |
| 522 | if (!info->attrs[L2TP_ATTR_VLAN_ID]) { |
| 523 | ret = -EINVAL; |
| 524 | goto out; |
| 525 | } |
| 526 | break; |
| 527 | case L2TP_PWTYPE_ETH: |
| 528 | break; |
| 529 | case L2TP_PWTYPE_PPP: |
| 530 | case L2TP_PWTYPE_PPP_AC: |
| 531 | break; |
| 532 | case L2TP_PWTYPE_IP: |
| 533 | default: |
| 534 | ret = -EPROTONOSUPPORT; |
| 535 | break; |
| 536 | } |
| 537 | |
| 538 | ret = -EPROTONOSUPPORT; |
| 539 | if (l2tp_nl_cmd_ops[cfg.pw_type]->session_create) |
| 540 | ret = (*l2tp_nl_cmd_ops[cfg.pw_type]->session_create)(net, tunnel_id, |
| 541 | session_id, peer_session_id, &cfg); |
| 542 | |
| 543 | out: |
| 544 | return ret; |
| 545 | } |
| 546 | |
| 547 | static int l2tp_nl_cmd_session_delete(struct sk_buff *skb, struct genl_info *info) |
| 548 | { |
| 549 | int ret = 0; |
| 550 | struct l2tp_session *session; |
| 551 | u16 pw_type; |
| 552 | |
| 553 | session = l2tp_nl_session_find(info); |
| 554 | if (session == NULL) { |
| 555 | ret = -ENODEV; |
| 556 | goto out; |
| 557 | } |
| 558 | |
| 559 | pw_type = session->pwtype; |
| 560 | if (pw_type < __L2TP_PWTYPE_MAX) |
| 561 | if (l2tp_nl_cmd_ops[pw_type] && l2tp_nl_cmd_ops[pw_type]->session_delete) |
| 562 | ret = (*l2tp_nl_cmd_ops[pw_type]->session_delete)(session); |
| 563 | |
| 564 | out: |
| 565 | return ret; |
| 566 | } |
| 567 | |
| 568 | static int l2tp_nl_cmd_session_modify(struct sk_buff *skb, struct genl_info *info) |
| 569 | { |
| 570 | int ret = 0; |
| 571 | struct l2tp_session *session; |
| 572 | |
| 573 | session = l2tp_nl_session_find(info); |
| 574 | if (session == NULL) { |
| 575 | ret = -ENODEV; |
| 576 | goto out; |
| 577 | } |
| 578 | |
| 579 | if (info->attrs[L2TP_ATTR_DEBUG]) |
| 580 | session->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]); |
| 581 | |
| 582 | if (info->attrs[L2TP_ATTR_DATA_SEQ]) |
| 583 | session->data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]); |
| 584 | |
| 585 | if (info->attrs[L2TP_ATTR_RECV_SEQ]) |
| 586 | session->recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]); |
| 587 | |
| 588 | if (info->attrs[L2TP_ATTR_SEND_SEQ]) |
| 589 | session->send_seq = nla_get_u8(info->attrs[L2TP_ATTR_SEND_SEQ]); |
| 590 | |
| 591 | if (info->attrs[L2TP_ATTR_LNS_MODE]) |
| 592 | session->lns_mode = nla_get_u8(info->attrs[L2TP_ATTR_LNS_MODE]); |
| 593 | |
| 594 | if (info->attrs[L2TP_ATTR_RECV_TIMEOUT]) |
| 595 | session->reorder_timeout = nla_get_msecs(info->attrs[L2TP_ATTR_RECV_TIMEOUT]); |
| 596 | |
| 597 | if (info->attrs[L2TP_ATTR_MTU]) |
| 598 | session->mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]); |
| 599 | |
| 600 | if (info->attrs[L2TP_ATTR_MRU]) |
| 601 | session->mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]); |
| 602 | |
| 603 | out: |
| 604 | return ret; |
| 605 | } |
| 606 | |
| 607 | static int l2tp_nl_session_send(struct sk_buff *skb, u32 pid, u32 seq, int flags, |
| 608 | struct l2tp_session *session) |
| 609 | { |
| 610 | void *hdr; |
| 611 | struct nlattr *nest; |
| 612 | struct l2tp_tunnel *tunnel = session->tunnel; |
| 613 | struct sock *sk = NULL; |
James Chapman | 5de7aee | 2012-04-29 21:48:46 +0000 | [diff] [blame] | 614 | struct l2tp_stats stats; |
| 615 | unsigned int start; |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 616 | |
| 617 | sk = tunnel->sock; |
| 618 | |
| 619 | hdr = genlmsg_put(skb, pid, seq, &l2tp_nl_family, flags, L2TP_CMD_SESSION_GET); |
| 620 | if (IS_ERR(hdr)) |
| 621 | return PTR_ERR(hdr); |
| 622 | |
David S. Miller | 60aed2a | 2012-04-01 19:59:31 -0400 | [diff] [blame] | 623 | if (nla_put_u32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id) || |
| 624 | nla_put_u32(skb, L2TP_ATTR_SESSION_ID, session->session_id) || |
| 625 | nla_put_u32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id) || |
| 626 | nla_put_u32(skb, L2TP_ATTR_PEER_SESSION_ID, |
| 627 | session->peer_session_id) || |
| 628 | nla_put_u32(skb, L2TP_ATTR_DEBUG, session->debug) || |
| 629 | nla_put_u16(skb, L2TP_ATTR_PW_TYPE, session->pwtype) || |
| 630 | nla_put_u16(skb, L2TP_ATTR_MTU, session->mtu) || |
| 631 | (session->mru && |
| 632 | nla_put_u16(skb, L2TP_ATTR_MRU, session->mru))) |
| 633 | goto nla_put_failure; |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 634 | |
David S. Miller | 60aed2a | 2012-04-01 19:59:31 -0400 | [diff] [blame] | 635 | if ((session->ifname && session->ifname[0] && |
| 636 | nla_put_string(skb, L2TP_ATTR_IFNAME, session->ifname)) || |
| 637 | (session->cookie_len && |
| 638 | nla_put(skb, L2TP_ATTR_COOKIE, session->cookie_len, |
| 639 | &session->cookie[0])) || |
| 640 | (session->peer_cookie_len && |
| 641 | nla_put(skb, L2TP_ATTR_PEER_COOKIE, session->peer_cookie_len, |
| 642 | &session->peer_cookie[0])) || |
| 643 | nla_put_u8(skb, L2TP_ATTR_RECV_SEQ, session->recv_seq) || |
| 644 | nla_put_u8(skb, L2TP_ATTR_SEND_SEQ, session->send_seq) || |
| 645 | nla_put_u8(skb, L2TP_ATTR_LNS_MODE, session->lns_mode) || |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 646 | #ifdef CONFIG_XFRM |
David S. Miller | 60aed2a | 2012-04-01 19:59:31 -0400 | [diff] [blame] | 647 | (((sk) && (sk->sk_policy[0] || sk->sk_policy[1])) && |
| 648 | nla_put_u8(skb, L2TP_ATTR_USING_IPSEC, 1)) || |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 649 | #endif |
David S. Miller | 60aed2a | 2012-04-01 19:59:31 -0400 | [diff] [blame] | 650 | (session->reorder_timeout && |
| 651 | nla_put_msecs(skb, L2TP_ATTR_RECV_TIMEOUT, session->reorder_timeout))) |
| 652 | goto nla_put_failure; |
James Chapman | 5de7aee | 2012-04-29 21:48:46 +0000 | [diff] [blame] | 653 | |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 654 | nest = nla_nest_start(skb, L2TP_ATTR_STATS); |
| 655 | if (nest == NULL) |
| 656 | goto nla_put_failure; |
James Chapman | 5de7aee | 2012-04-29 21:48:46 +0000 | [diff] [blame] | 657 | |
| 658 | do { |
| 659 | start = u64_stats_fetch_begin(&session->stats.syncp); |
| 660 | stats.tx_packets = session->stats.tx_packets; |
| 661 | stats.tx_bytes = session->stats.tx_bytes; |
| 662 | stats.tx_errors = session->stats.tx_errors; |
| 663 | stats.rx_packets = session->stats.rx_packets; |
| 664 | stats.rx_bytes = session->stats.rx_bytes; |
| 665 | stats.rx_errors = session->stats.rx_errors; |
| 666 | stats.rx_seq_discards = session->stats.rx_seq_discards; |
| 667 | stats.rx_oos_packets = session->stats.rx_oos_packets; |
| 668 | } while (u64_stats_fetch_retry(&session->stats.syncp, start)); |
| 669 | |
| 670 | if (nla_put_u64(skb, L2TP_ATTR_TX_PACKETS, stats.tx_packets) || |
| 671 | nla_put_u64(skb, L2TP_ATTR_TX_BYTES, stats.tx_bytes) || |
| 672 | nla_put_u64(skb, L2TP_ATTR_TX_ERRORS, stats.tx_errors) || |
| 673 | nla_put_u64(skb, L2TP_ATTR_RX_PACKETS, stats.rx_packets) || |
| 674 | nla_put_u64(skb, L2TP_ATTR_RX_BYTES, stats.rx_bytes) || |
David S. Miller | 60aed2a | 2012-04-01 19:59:31 -0400 | [diff] [blame] | 675 | nla_put_u64(skb, L2TP_ATTR_RX_SEQ_DISCARDS, |
James Chapman | 5de7aee | 2012-04-29 21:48:46 +0000 | [diff] [blame] | 676 | stats.rx_seq_discards) || |
David S. Miller | 60aed2a | 2012-04-01 19:59:31 -0400 | [diff] [blame] | 677 | nla_put_u64(skb, L2TP_ATTR_RX_OOS_PACKETS, |
James Chapman | 5de7aee | 2012-04-29 21:48:46 +0000 | [diff] [blame] | 678 | stats.rx_oos_packets) || |
| 679 | nla_put_u64(skb, L2TP_ATTR_RX_ERRORS, stats.rx_errors)) |
David S. Miller | 60aed2a | 2012-04-01 19:59:31 -0400 | [diff] [blame] | 680 | goto nla_put_failure; |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 681 | nla_nest_end(skb, nest); |
| 682 | |
| 683 | return genlmsg_end(skb, hdr); |
| 684 | |
| 685 | nla_put_failure: |
| 686 | genlmsg_cancel(skb, hdr); |
| 687 | return -1; |
| 688 | } |
| 689 | |
| 690 | static int l2tp_nl_cmd_session_get(struct sk_buff *skb, struct genl_info *info) |
| 691 | { |
| 692 | struct l2tp_session *session; |
| 693 | struct sk_buff *msg; |
| 694 | int ret; |
| 695 | |
| 696 | session = l2tp_nl_session_find(info); |
| 697 | if (session == NULL) { |
| 698 | ret = -ENODEV; |
| 699 | goto out; |
| 700 | } |
| 701 | |
Thomas Graf | 58050fc | 2012-06-28 03:57:45 +0000 | [diff] [blame] | 702 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 703 | if (!msg) { |
| 704 | ret = -ENOMEM; |
| 705 | goto out; |
| 706 | } |
| 707 | |
| 708 | ret = l2tp_nl_session_send(msg, info->snd_pid, info->snd_seq, |
| 709 | 0, session); |
| 710 | if (ret < 0) |
| 711 | goto err_out; |
| 712 | |
| 713 | return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid); |
| 714 | |
| 715 | err_out: |
| 716 | nlmsg_free(msg); |
| 717 | |
| 718 | out: |
| 719 | return ret; |
| 720 | } |
| 721 | |
| 722 | static int l2tp_nl_cmd_session_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 723 | { |
| 724 | struct net *net = sock_net(skb->sk); |
| 725 | struct l2tp_session *session; |
| 726 | struct l2tp_tunnel *tunnel = NULL; |
| 727 | int ti = cb->args[0]; |
| 728 | int si = cb->args[1]; |
| 729 | |
| 730 | for (;;) { |
| 731 | if (tunnel == NULL) { |
| 732 | tunnel = l2tp_tunnel_find_nth(net, ti); |
| 733 | if (tunnel == NULL) |
| 734 | goto out; |
| 735 | } |
| 736 | |
| 737 | session = l2tp_session_find_nth(tunnel, si); |
| 738 | if (session == NULL) { |
| 739 | ti++; |
| 740 | tunnel = NULL; |
| 741 | si = 0; |
| 742 | continue; |
| 743 | } |
| 744 | |
| 745 | if (l2tp_nl_session_send(skb, NETLINK_CB(cb->skb).pid, |
| 746 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
| 747 | session) <= 0) |
| 748 | break; |
| 749 | |
| 750 | si++; |
| 751 | } |
| 752 | |
| 753 | out: |
| 754 | cb->args[0] = ti; |
| 755 | cb->args[1] = si; |
| 756 | |
| 757 | return skb->len; |
| 758 | } |
| 759 | |
| 760 | static struct nla_policy l2tp_nl_policy[L2TP_ATTR_MAX + 1] = { |
| 761 | [L2TP_ATTR_NONE] = { .type = NLA_UNSPEC, }, |
| 762 | [L2TP_ATTR_PW_TYPE] = { .type = NLA_U16, }, |
| 763 | [L2TP_ATTR_ENCAP_TYPE] = { .type = NLA_U16, }, |
| 764 | [L2TP_ATTR_OFFSET] = { .type = NLA_U16, }, |
| 765 | [L2TP_ATTR_DATA_SEQ] = { .type = NLA_U8, }, |
| 766 | [L2TP_ATTR_L2SPEC_TYPE] = { .type = NLA_U8, }, |
| 767 | [L2TP_ATTR_L2SPEC_LEN] = { .type = NLA_U8, }, |
| 768 | [L2TP_ATTR_PROTO_VERSION] = { .type = NLA_U8, }, |
| 769 | [L2TP_ATTR_CONN_ID] = { .type = NLA_U32, }, |
| 770 | [L2TP_ATTR_PEER_CONN_ID] = { .type = NLA_U32, }, |
| 771 | [L2TP_ATTR_SESSION_ID] = { .type = NLA_U32, }, |
| 772 | [L2TP_ATTR_PEER_SESSION_ID] = { .type = NLA_U32, }, |
| 773 | [L2TP_ATTR_UDP_CSUM] = { .type = NLA_U8, }, |
| 774 | [L2TP_ATTR_VLAN_ID] = { .type = NLA_U16, }, |
| 775 | [L2TP_ATTR_DEBUG] = { .type = NLA_U32, }, |
| 776 | [L2TP_ATTR_RECV_SEQ] = { .type = NLA_U8, }, |
| 777 | [L2TP_ATTR_SEND_SEQ] = { .type = NLA_U8, }, |
| 778 | [L2TP_ATTR_LNS_MODE] = { .type = NLA_U8, }, |
| 779 | [L2TP_ATTR_USING_IPSEC] = { .type = NLA_U8, }, |
| 780 | [L2TP_ATTR_RECV_TIMEOUT] = { .type = NLA_MSECS, }, |
| 781 | [L2TP_ATTR_FD] = { .type = NLA_U32, }, |
| 782 | [L2TP_ATTR_IP_SADDR] = { .type = NLA_U32, }, |
| 783 | [L2TP_ATTR_IP_DADDR] = { .type = NLA_U32, }, |
| 784 | [L2TP_ATTR_UDP_SPORT] = { .type = NLA_U16, }, |
| 785 | [L2TP_ATTR_UDP_DPORT] = { .type = NLA_U16, }, |
| 786 | [L2TP_ATTR_MTU] = { .type = NLA_U16, }, |
| 787 | [L2TP_ATTR_MRU] = { .type = NLA_U16, }, |
| 788 | [L2TP_ATTR_STATS] = { .type = NLA_NESTED, }, |
Chris Elston | f9bac8d | 2012-04-29 21:48:52 +0000 | [diff] [blame] | 789 | [L2TP_ATTR_IP6_SADDR] = { |
| 790 | .type = NLA_BINARY, |
| 791 | .len = sizeof(struct in6_addr), |
| 792 | }, |
| 793 | [L2TP_ATTR_IP6_DADDR] = { |
| 794 | .type = NLA_BINARY, |
| 795 | .len = sizeof(struct in6_addr), |
| 796 | }, |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 797 | [L2TP_ATTR_IFNAME] = { |
| 798 | .type = NLA_NUL_STRING, |
| 799 | .len = IFNAMSIZ - 1, |
| 800 | }, |
| 801 | [L2TP_ATTR_COOKIE] = { |
| 802 | .type = NLA_BINARY, |
| 803 | .len = 8, |
| 804 | }, |
| 805 | [L2TP_ATTR_PEER_COOKIE] = { |
| 806 | .type = NLA_BINARY, |
| 807 | .len = 8, |
| 808 | }, |
| 809 | }; |
| 810 | |
| 811 | static struct genl_ops l2tp_nl_ops[] = { |
| 812 | { |
| 813 | .cmd = L2TP_CMD_NOOP, |
| 814 | .doit = l2tp_nl_cmd_noop, |
| 815 | .policy = l2tp_nl_policy, |
| 816 | /* can be retrieved by unprivileged users */ |
| 817 | }, |
| 818 | { |
| 819 | .cmd = L2TP_CMD_TUNNEL_CREATE, |
| 820 | .doit = l2tp_nl_cmd_tunnel_create, |
| 821 | .policy = l2tp_nl_policy, |
| 822 | .flags = GENL_ADMIN_PERM, |
| 823 | }, |
| 824 | { |
| 825 | .cmd = L2TP_CMD_TUNNEL_DELETE, |
| 826 | .doit = l2tp_nl_cmd_tunnel_delete, |
| 827 | .policy = l2tp_nl_policy, |
| 828 | .flags = GENL_ADMIN_PERM, |
| 829 | }, |
| 830 | { |
| 831 | .cmd = L2TP_CMD_TUNNEL_MODIFY, |
| 832 | .doit = l2tp_nl_cmd_tunnel_modify, |
| 833 | .policy = l2tp_nl_policy, |
| 834 | .flags = GENL_ADMIN_PERM, |
| 835 | }, |
| 836 | { |
| 837 | .cmd = L2TP_CMD_TUNNEL_GET, |
| 838 | .doit = l2tp_nl_cmd_tunnel_get, |
| 839 | .dumpit = l2tp_nl_cmd_tunnel_dump, |
| 840 | .policy = l2tp_nl_policy, |
| 841 | .flags = GENL_ADMIN_PERM, |
| 842 | }, |
| 843 | { |
| 844 | .cmd = L2TP_CMD_SESSION_CREATE, |
| 845 | .doit = l2tp_nl_cmd_session_create, |
| 846 | .policy = l2tp_nl_policy, |
| 847 | .flags = GENL_ADMIN_PERM, |
| 848 | }, |
| 849 | { |
| 850 | .cmd = L2TP_CMD_SESSION_DELETE, |
| 851 | .doit = l2tp_nl_cmd_session_delete, |
| 852 | .policy = l2tp_nl_policy, |
| 853 | .flags = GENL_ADMIN_PERM, |
| 854 | }, |
| 855 | { |
| 856 | .cmd = L2TP_CMD_SESSION_MODIFY, |
| 857 | .doit = l2tp_nl_cmd_session_modify, |
| 858 | .policy = l2tp_nl_policy, |
| 859 | .flags = GENL_ADMIN_PERM, |
| 860 | }, |
| 861 | { |
| 862 | .cmd = L2TP_CMD_SESSION_GET, |
| 863 | .doit = l2tp_nl_cmd_session_get, |
| 864 | .dumpit = l2tp_nl_cmd_session_dump, |
| 865 | .policy = l2tp_nl_policy, |
| 866 | .flags = GENL_ADMIN_PERM, |
| 867 | }, |
| 868 | }; |
| 869 | |
| 870 | int l2tp_nl_register_ops(enum l2tp_pwtype pw_type, const struct l2tp_nl_cmd_ops *ops) |
| 871 | { |
| 872 | int ret; |
| 873 | |
| 874 | ret = -EINVAL; |
| 875 | if (pw_type >= __L2TP_PWTYPE_MAX) |
| 876 | goto err; |
| 877 | |
| 878 | genl_lock(); |
| 879 | ret = -EBUSY; |
| 880 | if (l2tp_nl_cmd_ops[pw_type]) |
| 881 | goto out; |
| 882 | |
| 883 | l2tp_nl_cmd_ops[pw_type] = ops; |
David S. Miller | 8cb4901 | 2011-04-17 17:01:05 -0700 | [diff] [blame] | 884 | ret = 0; |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 885 | |
| 886 | out: |
| 887 | genl_unlock(); |
| 888 | err: |
David S. Miller | 8cb4901 | 2011-04-17 17:01:05 -0700 | [diff] [blame] | 889 | return ret; |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 890 | } |
| 891 | EXPORT_SYMBOL_GPL(l2tp_nl_register_ops); |
| 892 | |
| 893 | void l2tp_nl_unregister_ops(enum l2tp_pwtype pw_type) |
| 894 | { |
| 895 | if (pw_type < __L2TP_PWTYPE_MAX) { |
| 896 | genl_lock(); |
| 897 | l2tp_nl_cmd_ops[pw_type] = NULL; |
| 898 | genl_unlock(); |
| 899 | } |
| 900 | } |
| 901 | EXPORT_SYMBOL_GPL(l2tp_nl_unregister_ops); |
| 902 | |
| 903 | static int l2tp_nl_init(void) |
| 904 | { |
| 905 | int err; |
| 906 | |
Joe Perches | a4ca44f | 2012-05-16 09:55:56 +0000 | [diff] [blame] | 907 | pr_info("L2TP netlink interface\n"); |
James Chapman | 309795f | 2010-04-02 06:19:10 +0000 | [diff] [blame] | 908 | err = genl_register_family_with_ops(&l2tp_nl_family, l2tp_nl_ops, |
| 909 | ARRAY_SIZE(l2tp_nl_ops)); |
| 910 | |
| 911 | return err; |
| 912 | } |
| 913 | |
| 914 | static void l2tp_nl_cleanup(void) |
| 915 | { |
| 916 | genl_unregister_family(&l2tp_nl_family); |
| 917 | } |
| 918 | |
| 919 | module_init(l2tp_nl_init); |
| 920 | module_exit(l2tp_nl_cleanup); |
| 921 | |
| 922 | MODULE_AUTHOR("James Chapman <jchapman@katalix.com>"); |
| 923 | MODULE_DESCRIPTION("L2TP netlink"); |
| 924 | MODULE_LICENSE("GPL"); |
| 925 | MODULE_VERSION("1.0"); |
Neil Horman | e9412c3 | 2012-05-29 09:30:41 +0000 | [diff] [blame] | 926 | MODULE_ALIAS_GENL_FAMILY("l2tp"); |