#ifdef __KERNEL__
#include <linux/socket.h>
#include <linux/in.h>
+#else
+#include <netinet/in.h>
#endif
#define IPPROTO_L2TP 115
* @l2tp_addr: protocol specific address information
* @l2tp_conn_id: connection id of tunnel
*/
+#define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
struct sockaddr_l2tpip {
/* The first fields must match struct sockaddr_in */
sa_family_t l2tp_family; /* AF_INET */
sizeof(__u32)];
};
+/*****************************************************************************
+ * NETLINK_GENERIC netlink family.
+ *****************************************************************************/
+
+/*
+ * Commands.
+ * Valid TLVs of each command are:-
+ * TUNNEL_CREATE - CONN_ID, pw_type, netns, ifname, ipinfo, udpinfo, udpcsum, vlanid
+ * TUNNEL_DELETE - CONN_ID
+ * TUNNEL_MODIFY - CONN_ID, udpcsum
+ * TUNNEL_GETSTATS - CONN_ID, (stats)
+ * TUNNEL_GET - CONN_ID, (...)
+ * SESSION_CREATE - SESSION_ID, PW_TYPE, offset, data_seq, cookie, peer_cookie, offset, l2spec
+ * SESSION_DELETE - SESSION_ID
+ * SESSION_MODIFY - SESSION_ID, data_seq
+ * SESSION_GET - SESSION_ID, (...)
+ * SESSION_GETSTATS - SESSION_ID, (stats)
+ *
+ */
+enum {
+ L2TP_CMD_NOOP,
+ L2TP_CMD_TUNNEL_CREATE,
+ L2TP_CMD_TUNNEL_DELETE,
+ L2TP_CMD_TUNNEL_MODIFY,
+ L2TP_CMD_TUNNEL_GET,
+ L2TP_CMD_SESSION_CREATE,
+ L2TP_CMD_SESSION_DELETE,
+ L2TP_CMD_SESSION_MODIFY,
+ L2TP_CMD_SESSION_GET,
+ __L2TP_CMD_MAX,
+};
+
+#define L2TP_CMD_MAX (__L2TP_CMD_MAX - 1)
+
+/*
+ * ATTR types defined for L2TP
+ */
+enum {
+ L2TP_ATTR_NONE, /* no data */
+ L2TP_ATTR_PW_TYPE, /* u16, enum l2tp_pwtype */
+ L2TP_ATTR_ENCAP_TYPE, /* u16, enum l2tp_encap_type */
+ L2TP_ATTR_OFFSET, /* u16 */
+ L2TP_ATTR_DATA_SEQ, /* u16 */
+ L2TP_ATTR_L2SPEC_TYPE, /* u8, enum l2tp_l2spec_type */
+ L2TP_ATTR_L2SPEC_LEN, /* u8, enum l2tp_l2spec_type */
+ L2TP_ATTR_PROTO_VERSION, /* u8 */
+ L2TP_ATTR_IFNAME, /* string */
+ L2TP_ATTR_CONN_ID, /* u32 */
+ L2TP_ATTR_PEER_CONN_ID, /* u32 */
+ L2TP_ATTR_SESSION_ID, /* u32 */
+ L2TP_ATTR_PEER_SESSION_ID, /* u32 */
+ L2TP_ATTR_UDP_CSUM, /* u8 */
+ L2TP_ATTR_VLAN_ID, /* u16 */
+ L2TP_ATTR_COOKIE, /* 0, 4 or 8 bytes */
+ L2TP_ATTR_PEER_COOKIE, /* 0, 4 or 8 bytes */
+ L2TP_ATTR_DEBUG, /* u32 */
+ L2TP_ATTR_RECV_SEQ, /* u8 */
+ L2TP_ATTR_SEND_SEQ, /* u8 */
+ L2TP_ATTR_LNS_MODE, /* u8 */
+ L2TP_ATTR_USING_IPSEC, /* u8 */
+ L2TP_ATTR_RECV_TIMEOUT, /* msec */
+ L2TP_ATTR_FD, /* int */
+ L2TP_ATTR_IP_SADDR, /* u32 */
+ L2TP_ATTR_IP_DADDR, /* u32 */
+ L2TP_ATTR_UDP_SPORT, /* u16 */
+ L2TP_ATTR_UDP_DPORT, /* u16 */
+ L2TP_ATTR_MTU, /* u16 */
+ L2TP_ATTR_MRU, /* u16 */
+ L2TP_ATTR_STATS, /* nested */
+ __L2TP_ATTR_MAX,
+};
+
+#define L2TP_ATTR_MAX (__L2TP_ATTR_MAX - 1)
+
+/* Nested in L2TP_ATTR_STATS */
+enum {
+ L2TP_ATTR_STATS_NONE, /* no data */
+ L2TP_ATTR_TX_PACKETS, /* u64 */
+ L2TP_ATTR_TX_BYTES, /* u64 */
+ L2TP_ATTR_TX_ERRORS, /* u64 */
+ L2TP_ATTR_RX_PACKETS, /* u64 */
+ L2TP_ATTR_RX_BYTES, /* u64 */
+ L2TP_ATTR_RX_SEQ_DISCARDS, /* u64 */
+ L2TP_ATTR_RX_OOS_PACKETS, /* u64 */
+ L2TP_ATTR_RX_ERRORS, /* u64 */
+ __L2TP_ATTR_STATS_MAX,
+};
+
+#define L2TP_ATTR_STATS_MAX (__L2TP_ATTR_STATS_MAX - 1)
+
+enum l2tp_pwtype {
+ L2TP_PWTYPE_NONE = 0x0000,
+ L2TP_PWTYPE_ETH_VLAN = 0x0004,
+ L2TP_PWTYPE_ETH = 0x0005,
+ L2TP_PWTYPE_PPP = 0x0007,
+ L2TP_PWTYPE_PPP_AC = 0x0008,
+ L2TP_PWTYPE_IP = 0x000b,
+ __L2TP_PWTYPE_MAX
+};
+
+enum l2tp_l2spec_type {
+ L2TP_L2SPECTYPE_NONE,
+ L2TP_L2SPECTYPE_DEFAULT,
+};
+
+enum l2tp_encap_type {
+ L2TP_ENCAPTYPE_UDP,
+ L2TP_ENCAPTYPE_IP,
+};
+
+enum l2tp_seqmode {
+ L2TP_SEQ_NONE = 0,
+ L2TP_SEQ_IP = 1,
+ L2TP_SEQ_ALL = 2,
+};
+
+/*
+ * NETLINK_GENERIC related info
+ */
+#define L2TP_GENL_NAME "l2tp"
+#define L2TP_GENL_VERSION 0x1
+
#endif
--- /dev/null
+/*
+ * L2TP netlink layer, for management
+ *
+ * Copyright (c) 2008,2009,2010 Katalix Systems Ltd
+ *
+ * Partly based on the IrDA nelink implementation
+ * (see net/irda/irnetlink.c) which is:
+ * Copyright (c) 2007 Samuel Ortiz <samuel@sortiz.org>
+ * which is in turn partly based on the wireless netlink code:
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <net/sock.h>
+#include <net/genetlink.h>
+#include <net/udp.h>
+#include <linux/in.h>
+#include <linux/udp.h>
+#include <linux/socket.h>
+#include <linux/module.h>
+#include <linux/list.h>
+#include <net/net_namespace.h>
+
+#include <linux/l2tp.h>
+
+#include "l2tp_core.h"
+
+
+static struct genl_family l2tp_nl_family = {
+ .id = GENL_ID_GENERATE,
+ .name = L2TP_GENL_NAME,
+ .version = L2TP_GENL_VERSION,
+ .hdrsize = 0,
+ .maxattr = L2TP_ATTR_MAX,
+};
+
+/* Accessed under genl lock */
+static const struct l2tp_nl_cmd_ops *l2tp_nl_cmd_ops[__L2TP_PWTYPE_MAX];
+
+static struct l2tp_session *l2tp_nl_session_find(struct genl_info *info)
+{
+ u32 tunnel_id;
+ u32 session_id;
+ char *ifname;
+ struct l2tp_tunnel *tunnel;
+ struct l2tp_session *session = NULL;
+ struct net *net = genl_info_net(info);
+
+ if (info->attrs[L2TP_ATTR_IFNAME]) {
+ ifname = nla_data(info->attrs[L2TP_ATTR_IFNAME]);
+ session = l2tp_session_find_by_ifname(net, ifname);
+ } else if ((info->attrs[L2TP_ATTR_SESSION_ID]) &&
+ (info->attrs[L2TP_ATTR_CONN_ID])) {
+ tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
+ session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]);
+ tunnel = l2tp_tunnel_find(net, tunnel_id);
+ if (tunnel)
+ session = l2tp_session_find(net, tunnel, session_id);
+ }
+
+ return session;
+}
+
+static int l2tp_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
+{
+ struct sk_buff *msg;
+ void *hdr;
+ int ret = -ENOBUFS;
+
+ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!msg) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
+ &l2tp_nl_family, 0, L2TP_CMD_NOOP);
+ if (IS_ERR(hdr)) {
+ ret = PTR_ERR(hdr);
+ goto err_out;
+ }
+
+ genlmsg_end(msg, hdr);
+
+ return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid);
+
+err_out:
+ nlmsg_free(msg);
+
+out:
+ return ret;
+}
+
+static int l2tp_nl_cmd_tunnel_create(struct sk_buff *skb, struct genl_info *info)
+{
+ u32 tunnel_id;
+ u32 peer_tunnel_id;
+ int proto_version;
+ int fd;
+ int ret = 0;
+ struct l2tp_tunnel_cfg cfg = { 0, };
+ struct l2tp_tunnel *tunnel;
+ struct net *net = genl_info_net(info);
+
+ if (!info->attrs[L2TP_ATTR_CONN_ID]) {
+ ret = -EINVAL;
+ goto out;
+ }
+ tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
+
+ if (!info->attrs[L2TP_ATTR_PEER_CONN_ID]) {
+ ret = -EINVAL;
+ goto out;
+ }
+ peer_tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_CONN_ID]);
+
+ if (!info->attrs[L2TP_ATTR_PROTO_VERSION]) {
+ ret = -EINVAL;
+ goto out;
+ }
+ proto_version = nla_get_u8(info->attrs[L2TP_ATTR_PROTO_VERSION]);
+
+ if (!info->attrs[L2TP_ATTR_ENCAP_TYPE]) {
+ ret = -EINVAL;
+ goto out;
+ }
+ cfg.encap = nla_get_u16(info->attrs[L2TP_ATTR_ENCAP_TYPE]);
+
+ if (!info->attrs[L2TP_ATTR_FD]) {
+ ret = -EINVAL;
+ goto out;
+ }
+ fd = nla_get_u32(info->attrs[L2TP_ATTR_FD]);
+
+ if (info->attrs[L2TP_ATTR_DEBUG])
+ cfg.debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]);
+
+ tunnel = l2tp_tunnel_find(net, tunnel_id);
+ if (tunnel != NULL) {
+ ret = -EEXIST;
+ goto out;
+ }
+
+ ret = -EINVAL;
+ switch (cfg.encap) {
+ case L2TP_ENCAPTYPE_UDP:
+ case L2TP_ENCAPTYPE_IP:
+ ret = l2tp_tunnel_create(net, fd, proto_version, tunnel_id,
+ peer_tunnel_id, &cfg, &tunnel);
+ break;
+ }
+
+out:
+ return ret;
+}
+
+static int l2tp_nl_cmd_tunnel_delete(struct sk_buff *skb, struct genl_info *info)
+{
+ struct l2tp_tunnel *tunnel;
+ u32 tunnel_id;
+ int ret = 0;
+ struct net *net = genl_info_net(info);
+
+ if (!info->attrs[L2TP_ATTR_CONN_ID]) {
+ ret = -EINVAL;
+ goto out;
+ }
+ tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
+
+ tunnel = l2tp_tunnel_find(net, tunnel_id);
+ if (tunnel == NULL) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ (void) l2tp_tunnel_delete(tunnel);
+
+out:
+ return ret;
+}
+
+static int l2tp_nl_cmd_tunnel_modify(struct sk_buff *skb, struct genl_info *info)
+{
+ struct l2tp_tunnel *tunnel;
+ u32 tunnel_id;
+ int ret = 0;
+ struct net *net = genl_info_net(info);
+
+ if (!info->attrs[L2TP_ATTR_CONN_ID]) {
+ ret = -EINVAL;
+ goto out;
+ }
+ tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
+
+ tunnel = l2tp_tunnel_find(net, tunnel_id);
+ if (tunnel == NULL) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ if (info->attrs[L2TP_ATTR_DEBUG])
+ tunnel->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]);
+
+out:
+ return ret;
+}
+
+static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 pid, u32 seq, int flags,
+ struct l2tp_tunnel *tunnel)
+{
+ void *hdr;
+ struct nlattr *nest;
+ struct sock *sk = NULL;
+ struct inet_sock *inet;
+
+ hdr = genlmsg_put(skb, pid, seq, &l2tp_nl_family, flags,
+ L2TP_CMD_TUNNEL_GET);
+ if (IS_ERR(hdr))
+ return PTR_ERR(hdr);
+
+ NLA_PUT_U8(skb, L2TP_ATTR_PROTO_VERSION, tunnel->version);
+ NLA_PUT_U32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id);
+ NLA_PUT_U32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id);
+ NLA_PUT_U32(skb, L2TP_ATTR_DEBUG, tunnel->debug);
+ NLA_PUT_U16(skb, L2TP_ATTR_ENCAP_TYPE, tunnel->encap);
+
+ nest = nla_nest_start(skb, L2TP_ATTR_STATS);
+ if (nest == NULL)
+ goto nla_put_failure;
+
+ NLA_PUT_U64(skb, L2TP_ATTR_TX_PACKETS, tunnel->stats.tx_packets);
+ NLA_PUT_U64(skb, L2TP_ATTR_TX_BYTES, tunnel->stats.tx_bytes);
+ NLA_PUT_U64(skb, L2TP_ATTR_TX_ERRORS, tunnel->stats.tx_errors);
+ NLA_PUT_U64(skb, L2TP_ATTR_RX_PACKETS, tunnel->stats.rx_packets);
+ NLA_PUT_U64(skb, L2TP_ATTR_RX_BYTES, tunnel->stats.rx_bytes);
+ NLA_PUT_U64(skb, L2TP_ATTR_RX_SEQ_DISCARDS, tunnel->stats.rx_seq_discards);
+ NLA_PUT_U64(skb, L2TP_ATTR_RX_OOS_PACKETS, tunnel->stats.rx_oos_packets);
+ NLA_PUT_U64(skb, L2TP_ATTR_RX_ERRORS, tunnel->stats.rx_errors);
+ nla_nest_end(skb, nest);
+
+ sk = tunnel->sock;
+ if (!sk)
+ goto out;
+
+ inet = inet_sk(sk);
+
+ switch (tunnel->encap) {
+ case L2TP_ENCAPTYPE_UDP:
+ NLA_PUT_U16(skb, L2TP_ATTR_UDP_SPORT, ntohs(inet->inet_sport));
+ NLA_PUT_U16(skb, L2TP_ATTR_UDP_DPORT, ntohs(inet->inet_dport));
+ NLA_PUT_U8(skb, L2TP_ATTR_UDP_CSUM, (sk->sk_no_check != UDP_CSUM_NOXMIT));
+ /* NOBREAK */
+ case L2TP_ENCAPTYPE_IP:
+ NLA_PUT_BE32(skb, L2TP_ATTR_IP_SADDR, inet->inet_saddr);
+ NLA_PUT_BE32(skb, L2TP_ATTR_IP_DADDR, inet->inet_daddr);
+ break;
+ }
+
+out:
+ return genlmsg_end(skb, hdr);
+
+nla_put_failure:
+ genlmsg_cancel(skb, hdr);
+ return -1;
+}
+
+static int l2tp_nl_cmd_tunnel_get(struct sk_buff *skb, struct genl_info *info)
+{
+ struct l2tp_tunnel *tunnel;
+ struct sk_buff *msg;
+ u32 tunnel_id;
+ int ret = -ENOBUFS;
+ struct net *net = genl_info_net(info);
+
+ if (!info->attrs[L2TP_ATTR_CONN_ID]) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
+
+ tunnel = l2tp_tunnel_find(net, tunnel_id);
+ if (tunnel == NULL) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!msg) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = l2tp_nl_tunnel_send(msg, info->snd_pid, info->snd_seq,
+ NLM_F_ACK, tunnel);
+ if (ret < 0)
+ goto err_out;
+
+ return genlmsg_unicast(net, msg, info->snd_pid);
+
+err_out:
+ nlmsg_free(msg);
+
+out:
+ return ret;
+}
+
+static int l2tp_nl_cmd_tunnel_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ int ti = cb->args[0];
+ struct l2tp_tunnel *tunnel;
+ struct net *net = sock_net(skb->sk);
+
+ for (;;) {
+ tunnel = l2tp_tunnel_find_nth(net, ti);
+ if (tunnel == NULL)
+ goto out;
+
+ if (l2tp_nl_tunnel_send(skb, NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, NLM_F_MULTI,
+ tunnel) <= 0)
+ goto out;
+
+ ti++;
+ }
+
+out:
+ cb->args[0] = ti;
+
+ return skb->len;
+}
+
+static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *info)
+{
+ u32 tunnel_id = 0;
+ u32 session_id;
+ u32 peer_session_id;
+ int ret = 0;
+ struct l2tp_tunnel *tunnel;
+ struct l2tp_session *session;
+ struct l2tp_session_cfg cfg = { 0, };
+ struct net *net = genl_info_net(info);
+
+ if (!info->attrs[L2TP_ATTR_CONN_ID]) {
+ ret = -EINVAL;
+ goto out;
+ }
+ tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
+ tunnel = l2tp_tunnel_find(net, tunnel_id);
+ if (!tunnel) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ if (!info->attrs[L2TP_ATTR_SESSION_ID]) {
+ ret = -EINVAL;
+ goto out;
+ }
+ session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]);
+ session = l2tp_session_find(net, tunnel, session_id);
+ if (session) {
+ ret = -EEXIST;
+ goto out;
+ }
+
+ if (!info->attrs[L2TP_ATTR_PEER_SESSION_ID]) {
+ ret = -EINVAL;
+ goto out;
+ }
+ peer_session_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_SESSION_ID]);
+
+ if (!info->attrs[L2TP_ATTR_PW_TYPE]) {
+ ret = -EINVAL;
+ goto out;
+ }
+ cfg.pw_type = nla_get_u16(info->attrs[L2TP_ATTR_PW_TYPE]);
+ if (cfg.pw_type >= __L2TP_PWTYPE_MAX) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (tunnel->version > 2) {
+ if (info->attrs[L2TP_ATTR_OFFSET])
+ cfg.offset = nla_get_u16(info->attrs[L2TP_ATTR_OFFSET]);
+
+ if (info->attrs[L2TP_ATTR_DATA_SEQ])
+ cfg.data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]);
+
+ cfg.l2specific_type = L2TP_L2SPECTYPE_DEFAULT;
+ if (info->attrs[L2TP_ATTR_L2SPEC_TYPE])
+ cfg.l2specific_type = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_TYPE]);
+
+ cfg.l2specific_len = 4;
+ if (info->attrs[L2TP_ATTR_L2SPEC_LEN])
+ cfg.l2specific_len = nla_get_u8(info->attrs[L2TP_ATTR_L2SPEC_LEN]);
+
+ if (info->attrs[L2TP_ATTR_COOKIE]) {
+ u16 len = nla_len(info->attrs[L2TP_ATTR_COOKIE]);
+ if (len > 8) {
+ ret = -EINVAL;
+ goto out;
+ }
+ cfg.cookie_len = len;
+ memcpy(&cfg.cookie[0], nla_data(info->attrs[L2TP_ATTR_COOKIE]), len);
+ }
+ if (info->attrs[L2TP_ATTR_PEER_COOKIE]) {
+ u16 len = nla_len(info->attrs[L2TP_ATTR_PEER_COOKIE]);
+ if (len > 8) {
+ ret = -EINVAL;
+ goto out;
+ }
+ cfg.peer_cookie_len = len;
+ memcpy(&cfg.peer_cookie[0], nla_data(info->attrs[L2TP_ATTR_PEER_COOKIE]), len);
+ }
+ if (info->attrs[L2TP_ATTR_IFNAME])
+ cfg.ifname = nla_data(info->attrs[L2TP_ATTR_IFNAME]);
+
+ if (info->attrs[L2TP_ATTR_VLAN_ID])
+ cfg.vlan_id = nla_get_u16(info->attrs[L2TP_ATTR_VLAN_ID]);
+ }
+
+ if (info->attrs[L2TP_ATTR_DEBUG])
+ cfg.debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]);
+
+ if (info->attrs[L2TP_ATTR_RECV_SEQ])
+ cfg.recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]);
+
+ if (info->attrs[L2TP_ATTR_SEND_SEQ])
+ cfg.send_seq = nla_get_u8(info->attrs[L2TP_ATTR_SEND_SEQ]);
+
+ if (info->attrs[L2TP_ATTR_LNS_MODE])
+ cfg.lns_mode = nla_get_u8(info->attrs[L2TP_ATTR_LNS_MODE]);
+
+ if (info->attrs[L2TP_ATTR_RECV_TIMEOUT])
+ cfg.reorder_timeout = nla_get_msecs(info->attrs[L2TP_ATTR_RECV_TIMEOUT]);
+
+ if (info->attrs[L2TP_ATTR_MTU])
+ cfg.mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]);
+
+ if (info->attrs[L2TP_ATTR_MRU])
+ cfg.mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]);
+
+ if ((l2tp_nl_cmd_ops[cfg.pw_type] == NULL) ||
+ (l2tp_nl_cmd_ops[cfg.pw_type]->session_create == NULL)) {
+ ret = -EPROTONOSUPPORT;
+ goto out;
+ }
+
+ /* Check that pseudowire-specific params are present */
+ switch (cfg.pw_type) {
+ case L2TP_PWTYPE_NONE:
+ break;
+ case L2TP_PWTYPE_ETH_VLAN:
+ if (!info->attrs[L2TP_ATTR_VLAN_ID]) {
+ ret = -EINVAL;
+ goto out;
+ }
+ break;
+ case L2TP_PWTYPE_ETH:
+ break;
+ case L2TP_PWTYPE_PPP:
+ case L2TP_PWTYPE_PPP_AC:
+ break;
+ case L2TP_PWTYPE_IP:
+ default:
+ ret = -EPROTONOSUPPORT;
+ break;
+ }
+
+ ret = -EPROTONOSUPPORT;
+ if (l2tp_nl_cmd_ops[cfg.pw_type]->session_create)
+ ret = (*l2tp_nl_cmd_ops[cfg.pw_type]->session_create)(net, tunnel_id,
+ session_id, peer_session_id, &cfg);
+
+out:
+ return ret;
+}
+
+static int l2tp_nl_cmd_session_delete(struct sk_buff *skb, struct genl_info *info)
+{
+ int ret = 0;
+ struct l2tp_session *session;
+ u16 pw_type;
+
+ session = l2tp_nl_session_find(info);
+ if (session == NULL) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ pw_type = session->pwtype;
+ if (pw_type < __L2TP_PWTYPE_MAX)
+ if (l2tp_nl_cmd_ops[pw_type] && l2tp_nl_cmd_ops[pw_type]->session_delete)
+ ret = (*l2tp_nl_cmd_ops[pw_type]->session_delete)(session);
+
+out:
+ return ret;
+}
+
+static int l2tp_nl_cmd_session_modify(struct sk_buff *skb, struct genl_info *info)
+{
+ int ret = 0;
+ struct l2tp_session *session;
+
+ session = l2tp_nl_session_find(info);
+ if (session == NULL) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ if (info->attrs[L2TP_ATTR_DEBUG])
+ session->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]);
+
+ if (info->attrs[L2TP_ATTR_DATA_SEQ])
+ session->data_seq = nla_get_u8(info->attrs[L2TP_ATTR_DATA_SEQ]);
+
+ if (info->attrs[L2TP_ATTR_RECV_SEQ])
+ session->recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]);
+
+ if (info->attrs[L2TP_ATTR_SEND_SEQ])
+ session->send_seq = nla_get_u8(info->attrs[L2TP_ATTR_SEND_SEQ]);
+
+ if (info->attrs[L2TP_ATTR_LNS_MODE])
+ session->lns_mode = nla_get_u8(info->attrs[L2TP_ATTR_LNS_MODE]);
+
+ if (info->attrs[L2TP_ATTR_RECV_TIMEOUT])
+ session->reorder_timeout = nla_get_msecs(info->attrs[L2TP_ATTR_RECV_TIMEOUT]);
+
+ if (info->attrs[L2TP_ATTR_MTU])
+ session->mtu = nla_get_u16(info->attrs[L2TP_ATTR_MTU]);
+
+ if (info->attrs[L2TP_ATTR_MRU])
+ session->mru = nla_get_u16(info->attrs[L2TP_ATTR_MRU]);
+
+out:
+ return ret;
+}
+
+static int l2tp_nl_session_send(struct sk_buff *skb, u32 pid, u32 seq, int flags,
+ struct l2tp_session *session)
+{
+ void *hdr;
+ struct nlattr *nest;
+ struct l2tp_tunnel *tunnel = session->tunnel;
+ struct sock *sk = NULL;
+
+ sk = tunnel->sock;
+
+ hdr = genlmsg_put(skb, pid, seq, &l2tp_nl_family, flags, L2TP_CMD_SESSION_GET);
+ if (IS_ERR(hdr))
+ return PTR_ERR(hdr);
+
+ NLA_PUT_U32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id);
+ NLA_PUT_U32(skb, L2TP_ATTR_SESSION_ID, session->session_id);
+ NLA_PUT_U32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id);
+ NLA_PUT_U32(skb, L2TP_ATTR_PEER_SESSION_ID, session->peer_session_id);
+ NLA_PUT_U32(skb, L2TP_ATTR_DEBUG, session->debug);
+ NLA_PUT_U16(skb, L2TP_ATTR_PW_TYPE, session->pwtype);
+ NLA_PUT_U16(skb, L2TP_ATTR_MTU, session->mtu);
+ if (session->mru)
+ NLA_PUT_U16(skb, L2TP_ATTR_MRU, session->mru);
+
+ if (session->ifname && session->ifname[0])
+ NLA_PUT_STRING(skb, L2TP_ATTR_IFNAME, session->ifname);
+ if (session->cookie_len)
+ NLA_PUT(skb, L2TP_ATTR_COOKIE, session->cookie_len, &session->cookie[0]);
+ if (session->peer_cookie_len)
+ NLA_PUT(skb, L2TP_ATTR_PEER_COOKIE, session->peer_cookie_len, &session->peer_cookie[0]);
+ NLA_PUT_U8(skb, L2TP_ATTR_RECV_SEQ, session->recv_seq);
+ NLA_PUT_U8(skb, L2TP_ATTR_SEND_SEQ, session->send_seq);
+ NLA_PUT_U8(skb, L2TP_ATTR_LNS_MODE, session->lns_mode);
+#ifdef CONFIG_XFRM
+ if ((sk) && (sk->sk_policy[0] || sk->sk_policy[1]))
+ NLA_PUT_U8(skb, L2TP_ATTR_USING_IPSEC, 1);
+#endif
+ if (session->reorder_timeout)
+ NLA_PUT_MSECS(skb, L2TP_ATTR_RECV_TIMEOUT, session->reorder_timeout);
+
+ nest = nla_nest_start(skb, L2TP_ATTR_STATS);
+ if (nest == NULL)
+ goto nla_put_failure;
+ NLA_PUT_U64(skb, L2TP_ATTR_TX_PACKETS, session->stats.tx_packets);
+ NLA_PUT_U64(skb, L2TP_ATTR_TX_BYTES, session->stats.tx_bytes);
+ NLA_PUT_U64(skb, L2TP_ATTR_TX_ERRORS, session->stats.tx_errors);
+ NLA_PUT_U64(skb, L2TP_ATTR_RX_PACKETS, session->stats.rx_packets);
+ NLA_PUT_U64(skb, L2TP_ATTR_RX_BYTES, session->stats.rx_bytes);
+ NLA_PUT_U64(skb, L2TP_ATTR_RX_SEQ_DISCARDS, session->stats.rx_seq_discards);
+ NLA_PUT_U64(skb, L2TP_ATTR_RX_OOS_PACKETS, session->stats.rx_oos_packets);
+ NLA_PUT_U64(skb, L2TP_ATTR_RX_ERRORS, session->stats.rx_errors);
+ nla_nest_end(skb, nest);
+
+ return genlmsg_end(skb, hdr);
+
+ nla_put_failure:
+ genlmsg_cancel(skb, hdr);
+ return -1;
+}
+
+static int l2tp_nl_cmd_session_get(struct sk_buff *skb, struct genl_info *info)
+{
+ struct l2tp_session *session;
+ struct sk_buff *msg;
+ int ret;
+
+ session = l2tp_nl_session_find(info);
+ if (session == NULL) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!msg) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = l2tp_nl_session_send(msg, info->snd_pid, info->snd_seq,
+ 0, session);
+ if (ret < 0)
+ goto err_out;
+
+ return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid);
+
+err_out:
+ nlmsg_free(msg);
+
+out:
+ return ret;
+}
+
+static int l2tp_nl_cmd_session_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct net *net = sock_net(skb->sk);
+ struct l2tp_session *session;
+ struct l2tp_tunnel *tunnel = NULL;
+ int ti = cb->args[0];
+ int si = cb->args[1];
+
+ for (;;) {
+ if (tunnel == NULL) {
+ tunnel = l2tp_tunnel_find_nth(net, ti);
+ if (tunnel == NULL)
+ goto out;
+ }
+
+ session = l2tp_session_find_nth(tunnel, si);
+ if (session == NULL) {
+ ti++;
+ tunnel = NULL;
+ si = 0;
+ continue;
+ }
+
+ if (l2tp_nl_session_send(skb, NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, NLM_F_MULTI,
+ session) <= 0)
+ break;
+
+ si++;
+ }
+
+out:
+ cb->args[0] = ti;
+ cb->args[1] = si;
+
+ return skb->len;
+}
+
+static struct nla_policy l2tp_nl_policy[L2TP_ATTR_MAX + 1] = {
+ [L2TP_ATTR_NONE] = { .type = NLA_UNSPEC, },
+ [L2TP_ATTR_PW_TYPE] = { .type = NLA_U16, },
+ [L2TP_ATTR_ENCAP_TYPE] = { .type = NLA_U16, },
+ [L2TP_ATTR_OFFSET] = { .type = NLA_U16, },
+ [L2TP_ATTR_DATA_SEQ] = { .type = NLA_U8, },
+ [L2TP_ATTR_L2SPEC_TYPE] = { .type = NLA_U8, },
+ [L2TP_ATTR_L2SPEC_LEN] = { .type = NLA_U8, },
+ [L2TP_ATTR_PROTO_VERSION] = { .type = NLA_U8, },
+ [L2TP_ATTR_CONN_ID] = { .type = NLA_U32, },
+ [L2TP_ATTR_PEER_CONN_ID] = { .type = NLA_U32, },
+ [L2TP_ATTR_SESSION_ID] = { .type = NLA_U32, },
+ [L2TP_ATTR_PEER_SESSION_ID] = { .type = NLA_U32, },
+ [L2TP_ATTR_UDP_CSUM] = { .type = NLA_U8, },
+ [L2TP_ATTR_VLAN_ID] = { .type = NLA_U16, },
+ [L2TP_ATTR_DEBUG] = { .type = NLA_U32, },
+ [L2TP_ATTR_RECV_SEQ] = { .type = NLA_U8, },
+ [L2TP_ATTR_SEND_SEQ] = { .type = NLA_U8, },
+ [L2TP_ATTR_LNS_MODE] = { .type = NLA_U8, },
+ [L2TP_ATTR_USING_IPSEC] = { .type = NLA_U8, },
+ [L2TP_ATTR_RECV_TIMEOUT] = { .type = NLA_MSECS, },
+ [L2TP_ATTR_FD] = { .type = NLA_U32, },
+ [L2TP_ATTR_IP_SADDR] = { .type = NLA_U32, },
+ [L2TP_ATTR_IP_DADDR] = { .type = NLA_U32, },
+ [L2TP_ATTR_UDP_SPORT] = { .type = NLA_U16, },
+ [L2TP_ATTR_UDP_DPORT] = { .type = NLA_U16, },
+ [L2TP_ATTR_MTU] = { .type = NLA_U16, },
+ [L2TP_ATTR_MRU] = { .type = NLA_U16, },
+ [L2TP_ATTR_STATS] = { .type = NLA_NESTED, },
+ [L2TP_ATTR_IFNAME] = {
+ .type = NLA_NUL_STRING,
+ .len = IFNAMSIZ - 1,
+ },
+ [L2TP_ATTR_COOKIE] = {
+ .type = NLA_BINARY,
+ .len = 8,
+ },
+ [L2TP_ATTR_PEER_COOKIE] = {
+ .type = NLA_BINARY,
+ .len = 8,
+ },
+};
+
+static struct genl_ops l2tp_nl_ops[] = {
+ {
+ .cmd = L2TP_CMD_NOOP,
+ .doit = l2tp_nl_cmd_noop,
+ .policy = l2tp_nl_policy,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = L2TP_CMD_TUNNEL_CREATE,
+ .doit = l2tp_nl_cmd_tunnel_create,
+ .policy = l2tp_nl_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = L2TP_CMD_TUNNEL_DELETE,
+ .doit = l2tp_nl_cmd_tunnel_delete,
+ .policy = l2tp_nl_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = L2TP_CMD_TUNNEL_MODIFY,
+ .doit = l2tp_nl_cmd_tunnel_modify,
+ .policy = l2tp_nl_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = L2TP_CMD_TUNNEL_GET,
+ .doit = l2tp_nl_cmd_tunnel_get,
+ .dumpit = l2tp_nl_cmd_tunnel_dump,
+ .policy = l2tp_nl_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = L2TP_CMD_SESSION_CREATE,
+ .doit = l2tp_nl_cmd_session_create,
+ .policy = l2tp_nl_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = L2TP_CMD_SESSION_DELETE,
+ .doit = l2tp_nl_cmd_session_delete,
+ .policy = l2tp_nl_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = L2TP_CMD_SESSION_MODIFY,
+ .doit = l2tp_nl_cmd_session_modify,
+ .policy = l2tp_nl_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = L2TP_CMD_SESSION_GET,
+ .doit = l2tp_nl_cmd_session_get,
+ .dumpit = l2tp_nl_cmd_session_dump,
+ .policy = l2tp_nl_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
+};
+
+int l2tp_nl_register_ops(enum l2tp_pwtype pw_type, const struct l2tp_nl_cmd_ops *ops)
+{
+ int ret;
+
+ ret = -EINVAL;
+ if (pw_type >= __L2TP_PWTYPE_MAX)
+ goto err;
+
+ genl_lock();
+ ret = -EBUSY;
+ if (l2tp_nl_cmd_ops[pw_type])
+ goto out;
+
+ l2tp_nl_cmd_ops[pw_type] = ops;
+
+out:
+ genl_unlock();
+err:
+ return 0;
+}
+EXPORT_SYMBOL_GPL(l2tp_nl_register_ops);
+
+void l2tp_nl_unregister_ops(enum l2tp_pwtype pw_type)
+{
+ if (pw_type < __L2TP_PWTYPE_MAX) {
+ genl_lock();
+ l2tp_nl_cmd_ops[pw_type] = NULL;
+ genl_unlock();
+ }
+}
+EXPORT_SYMBOL_GPL(l2tp_nl_unregister_ops);
+
+static int l2tp_nl_init(void)
+{
+ int err;
+
+ printk(KERN_INFO "L2TP netlink interface\n");
+ err = genl_register_family_with_ops(&l2tp_nl_family, l2tp_nl_ops,
+ ARRAY_SIZE(l2tp_nl_ops));
+
+ return err;
+}
+
+static void l2tp_nl_cleanup(void)
+{
+ genl_unregister_family(&l2tp_nl_family);
+}
+
+module_init(l2tp_nl_init);
+module_exit(l2tp_nl_cleanup);
+
+MODULE_AUTHOR("James Chapman <jchapman@katalix.com>");
+MODULE_DESCRIPTION("L2TP netlink");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("1.0");
+MODULE_ALIAS("net-pf-" __stringify(PF_NETLINK) "-proto-" \
+ __stringify(NETLINK_GENERIC) "-type-" "l2tp")
#include <linux/hash.h>
#include <linux/sort.h>
#include <linux/proc_fs.h>
+#include <linux/l2tp.h>
#include <linux/nsproxy.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
if (tunnel_id == 0)
goto end;
+ tunnel = l2tp_tunnel_find(sock_net(sk), tunnel_id);
+
/* Special case: create tunnel context if session_id and
* peer_session_id is 0. Otherwise look up tunnel using supplied
* tunnel id.
*/
if ((session_id == 0) && (peer_session_id == 0)) {
- error = l2tp_tunnel_create(sock_net(sk), fd, ver, tunnel_id, peer_tunnel_id, NULL, &tunnel);
- if (error < 0)
- goto end;
+ if (tunnel == NULL) {
+ struct l2tp_tunnel_cfg tcfg = {
+ .encap = L2TP_ENCAPTYPE_UDP,
+ .debug = 0,
+ };
+ error = l2tp_tunnel_create(sock_net(sk), fd, ver, tunnel_id, peer_tunnel_id, &tcfg, &tunnel);
+ if (error < 0)
+ goto end;
+ }
} else {
- tunnel = l2tp_tunnel_find(sock_net(sk), tunnel_id);
-
/* Error if we can't find the tunnel */
error = -ENOENT;
if (tunnel == NULL)
if (tunnel->recv_payload_hook == NULL)
tunnel->recv_payload_hook = pppol2tp_recv_payload_hook;
- /* Check that this session doesn't already exist */
- error = -EEXIST;
- session = l2tp_session_find(sock_net(sk), tunnel, session_id);
- if (session != NULL)
- goto end;
-
- /* Default MTU values. */
- if (cfg.mtu == 0)
- cfg.mtu = 1500 - PPPOL2TP_HEADER_OVERHEAD;
- if (cfg.mru == 0)
- cfg.mru = cfg.mtu;
- cfg.debug = tunnel->debug;
+ if (tunnel->peer_tunnel_id == 0) {
+ if (ver == 2)
+ tunnel->peer_tunnel_id = sp->pppol2tp.d_tunnel;
+ else
+ tunnel->peer_tunnel_id = sp3->pppol2tp.d_tunnel;
+ }
- /* Allocate and initialize a new session context. */
- session = l2tp_session_create(sizeof(struct pppol2tp_session),
- tunnel, session_id,
- peer_session_id, &cfg);
+ /* Create session if it doesn't already exist. We handle the
+ * case where a session was previously created by the netlink
+ * interface by checking that the session doesn't already have
+ * a socket and its tunnel socket are what we expect. If any
+ * of those checks fail, return EEXIST to the caller.
+ */
+ session = l2tp_session_find(sock_net(sk), tunnel, session_id);
if (session == NULL) {
- error = -ENOMEM;
- goto end;
+ /* Default MTU must allow space for UDP/L2TP/PPP
+ * headers.
+ */
+ cfg.mtu = cfg.mru = 1500 - PPPOL2TP_HEADER_OVERHEAD;
+
+ /* Allocate and initialize a new session context. */
+ session = l2tp_session_create(sizeof(struct pppol2tp_session),
+ tunnel, session_id,
+ peer_session_id, &cfg);
+ if (session == NULL) {
+ error = -ENOMEM;
+ goto end;
+ }
+ } else {
+ ps = l2tp_session_priv(session);
+ error = -EEXIST;
+ if (ps->sock != NULL)
+ goto end;
+
+ /* consistency checks */
+ if (ps->tunnel_sock != tunnel->sock)
+ goto end;
}
+ /* Associate session with its PPPoL2TP socket */
ps = l2tp_session_priv(session);
ps->owner = current->pid;
ps->sock = sk;
return error;
}
+#ifdef CONFIG_L2TP_V3
+
+/* Called when creating sessions via the netlink interface.
+ */
+static int pppol2tp_session_create(struct net *net, u32 tunnel_id, u32 session_id, u32 peer_session_id, struct l2tp_session_cfg *cfg)
+{
+ int error;
+ struct l2tp_tunnel *tunnel;
+ struct l2tp_session *session;
+ struct pppol2tp_session *ps;
+
+ tunnel = l2tp_tunnel_find(net, tunnel_id);
+
+ /* Error if we can't find the tunnel */
+ error = -ENOENT;
+ if (tunnel == NULL)
+ goto out;
+
+ /* Error if tunnel socket is not prepped */
+ if (tunnel->sock == NULL)
+ goto out;
+
+ /* Check that this session doesn't already exist */
+ error = -EEXIST;
+ session = l2tp_session_find(net, tunnel, session_id);
+ if (session != NULL)
+ goto out;
+
+ /* Default MTU values. */
+ if (cfg->mtu == 0)
+ cfg->mtu = 1500 - PPPOL2TP_HEADER_OVERHEAD;
+ if (cfg->mru == 0)
+ cfg->mru = cfg->mtu;
+
+ /* Allocate and initialize a new session context. */
+ error = -ENOMEM;
+ session = l2tp_session_create(sizeof(struct pppol2tp_session),
+ tunnel, session_id,
+ peer_session_id, cfg);
+ if (session == NULL)
+ goto out;
+
+ ps = l2tp_session_priv(session);
+ ps->tunnel_sock = tunnel->sock;
+
+ PRINTK(session->debug, PPPOL2TP_MSG_CONTROL, KERN_INFO,
+ "%s: created\n", session->name);
+
+ error = 0;
+
+out:
+ return error;
+}
+
+/* Called when deleting sessions via the netlink interface.
+ */
+static int pppol2tp_session_delete(struct l2tp_session *session)
+{
+ struct pppol2tp_session *ps = l2tp_session_priv(session);
+
+ if (ps->sock == NULL)
+ l2tp_session_dec_refcount(session);
+
+ return 0;
+}
+
+#endif /* CONFIG_L2TP_V3 */
+
/* getname() support.
*/
static int pppol2tp_getname(struct socket *sock, struct sockaddr *uaddr,
.ioctl = pppol2tp_ioctl
};
+#ifdef CONFIG_L2TP_V3
+
+static const struct l2tp_nl_cmd_ops pppol2tp_nl_cmd_ops = {
+ .session_create = pppol2tp_session_create,
+ .session_delete = pppol2tp_session_delete,
+};
+
+#endif /* CONFIG_L2TP_V3 */
+
static int __init pppol2tp_init(void)
{
int err;
if (err)
goto out_unregister_pppol2tp_proto;
+#ifdef CONFIG_L2TP_V3
+ err = l2tp_nl_register_ops(L2TP_PWTYPE_PPP, &pppol2tp_nl_cmd_ops);
+ if (err)
+ goto out_unregister_pppox;
+#endif
+
printk(KERN_INFO "PPPoL2TP kernel driver, %s\n",
PPPOL2TP_DRV_VERSION);
out:
return err;
+
+#ifdef CONFIG_L2TP_V3
+out_unregister_pppox:
+ unregister_pppox_proto(PX_PROTO_OL2TP);
+#endif
out_unregister_pppol2tp_proto:
proto_unregister(&pppol2tp_sk_proto);
out_unregister_pppol2tp_pernet:
static void __exit pppol2tp_exit(void)
{
+#ifdef CONFIG_L2TP_V3
+ l2tp_nl_unregister_ops(L2TP_PWTYPE_PPP);
+#endif
unregister_pppox_proto(PX_PROTO_OL2TP);
proto_unregister(&pppol2tp_sk_proto);
unregister_pernet_device(&pppol2tp_net_ops);
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff