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@@ -0,0 +1,830 @@
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+/*
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+ * L2TP netlink layer, for management
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+ *
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+ * Copyright (c) 2008,2009,2010 Katalix Systems Ltd
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+ *
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+ * Partly based on the IrDA nelink implementation
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+ * (see net/irda/irnetlink.c) which is:
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+ * Copyright (c) 2007 Samuel Ortiz <samuel@sortiz.org>
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+ * which is in turn partly based on the wireless netlink code:
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+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ */
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+
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+#include <net/sock.h>
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+#include <net/genetlink.h>
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+#include <net/udp.h>
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+#include <linux/in.h>
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+#include <linux/udp.h>
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+#include <linux/socket.h>
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+#include <linux/module.h>
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+#include <linux/list.h>
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+#include <net/net_namespace.h>
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+
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+#include <linux/l2tp.h>
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+
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+#include "l2tp_core.h"
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+
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+
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+static struct genl_family l2tp_nl_family = {
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+ .id = GENL_ID_GENERATE,
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+ .name = L2TP_GENL_NAME,
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+ .version = L2TP_GENL_VERSION,
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+ .hdrsize = 0,
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+ .maxattr = L2TP_ATTR_MAX,
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+};
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+
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+/* Accessed under genl lock */
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+static const struct l2tp_nl_cmd_ops *l2tp_nl_cmd_ops[__L2TP_PWTYPE_MAX];
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+
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+static struct l2tp_session *l2tp_nl_session_find(struct genl_info *info)
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+{
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+ u32 tunnel_id;
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+ u32 session_id;
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+ char *ifname;
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+ struct l2tp_tunnel *tunnel;
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+ struct l2tp_session *session = NULL;
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+ struct net *net = genl_info_net(info);
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+
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+ if (info->attrs[L2TP_ATTR_IFNAME]) {
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+ ifname = nla_data(info->attrs[L2TP_ATTR_IFNAME]);
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+ session = l2tp_session_find_by_ifname(net, ifname);
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+ } else if ((info->attrs[L2TP_ATTR_SESSION_ID]) &&
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+ (info->attrs[L2TP_ATTR_CONN_ID])) {
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+ tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
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+ session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]);
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+ tunnel = l2tp_tunnel_find(net, tunnel_id);
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+ if (tunnel)
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+ session = l2tp_session_find(net, tunnel, session_id);
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+ }
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+
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+ return session;
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+}
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+
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+static int l2tp_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
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+{
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+ struct sk_buff *msg;
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+ void *hdr;
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+ int ret = -ENOBUFS;
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+
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+ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
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+ if (!msg) {
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+ ret = -ENOMEM;
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+ goto out;
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+ }
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+
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+ hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
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+ &l2tp_nl_family, 0, L2TP_CMD_NOOP);
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+ if (IS_ERR(hdr)) {
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+ ret = PTR_ERR(hdr);
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+ goto err_out;
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+ }
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+
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+ genlmsg_end(msg, hdr);
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+
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+ return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid);
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+
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+err_out:
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+ nlmsg_free(msg);
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+
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+out:
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+ return ret;
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+}
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+
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+static int l2tp_nl_cmd_tunnel_create(struct sk_buff *skb, struct genl_info *info)
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+{
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+ u32 tunnel_id;
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+ u32 peer_tunnel_id;
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+ int proto_version;
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+ int fd;
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+ int ret = 0;
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+ struct l2tp_tunnel_cfg cfg = { 0, };
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+ struct l2tp_tunnel *tunnel;
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+ struct net *net = genl_info_net(info);
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+
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+ if (!info->attrs[L2TP_ATTR_CONN_ID]) {
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+ ret = -EINVAL;
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+ goto out;
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+ }
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+ tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
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+
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+ if (!info->attrs[L2TP_ATTR_PEER_CONN_ID]) {
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+ ret = -EINVAL;
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+ goto out;
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+ }
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+ peer_tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_CONN_ID]);
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+
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+ if (!info->attrs[L2TP_ATTR_PROTO_VERSION]) {
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+ ret = -EINVAL;
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+ goto out;
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+ }
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+ proto_version = nla_get_u8(info->attrs[L2TP_ATTR_PROTO_VERSION]);
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+
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+ if (!info->attrs[L2TP_ATTR_ENCAP_TYPE]) {
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+ ret = -EINVAL;
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+ goto out;
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+ }
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+ cfg.encap = nla_get_u16(info->attrs[L2TP_ATTR_ENCAP_TYPE]);
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+
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+ if (!info->attrs[L2TP_ATTR_FD]) {
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+ ret = -EINVAL;
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+ goto out;
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+ }
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+ fd = nla_get_u32(info->attrs[L2TP_ATTR_FD]);
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+
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+ if (info->attrs[L2TP_ATTR_DEBUG])
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+ cfg.debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]);
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+
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+ tunnel = l2tp_tunnel_find(net, tunnel_id);
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+ if (tunnel != NULL) {
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+ ret = -EEXIST;
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+ goto out;
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+ }
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+
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+ ret = -EINVAL;
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+ switch (cfg.encap) {
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+ case L2TP_ENCAPTYPE_UDP:
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+ case L2TP_ENCAPTYPE_IP:
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+ ret = l2tp_tunnel_create(net, fd, proto_version, tunnel_id,
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+ peer_tunnel_id, &cfg, &tunnel);
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+ break;
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+ }
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+
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+out:
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+ return ret;
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+}
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+
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+static int l2tp_nl_cmd_tunnel_delete(struct sk_buff *skb, struct genl_info *info)
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+{
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+ struct l2tp_tunnel *tunnel;
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+ u32 tunnel_id;
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+ int ret = 0;
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+ struct net *net = genl_info_net(info);
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+
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+ if (!info->attrs[L2TP_ATTR_CONN_ID]) {
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+ ret = -EINVAL;
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+ goto out;
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+ }
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+ tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
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+
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+ tunnel = l2tp_tunnel_find(net, tunnel_id);
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+ if (tunnel == NULL) {
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+ ret = -ENODEV;
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+ goto out;
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+ }
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+
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+ (void) l2tp_tunnel_delete(tunnel);
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+
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+out:
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+ return ret;
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+}
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+
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+static int l2tp_nl_cmd_tunnel_modify(struct sk_buff *skb, struct genl_info *info)
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+{
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+ struct l2tp_tunnel *tunnel;
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+ u32 tunnel_id;
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+ int ret = 0;
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+ struct net *net = genl_info_net(info);
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+
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+ if (!info->attrs[L2TP_ATTR_CONN_ID]) {
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+ ret = -EINVAL;
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+ goto out;
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+ }
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+ tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
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+
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+ tunnel = l2tp_tunnel_find(net, tunnel_id);
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+ if (tunnel == NULL) {
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+ ret = -ENODEV;
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+ goto out;
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+ }
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+
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+ if (info->attrs[L2TP_ATTR_DEBUG])
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+ tunnel->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]);
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+
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+out:
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+ return ret;
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+}
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+
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+static int l2tp_nl_tunnel_send(struct sk_buff *skb, u32 pid, u32 seq, int flags,
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+ struct l2tp_tunnel *tunnel)
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+{
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+ void *hdr;
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+ struct nlattr *nest;
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+ struct sock *sk = NULL;
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+ struct inet_sock *inet;
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+
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+ hdr = genlmsg_put(skb, pid, seq, &l2tp_nl_family, flags,
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+ L2TP_CMD_TUNNEL_GET);
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+ if (IS_ERR(hdr))
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+ return PTR_ERR(hdr);
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+
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+ NLA_PUT_U8(skb, L2TP_ATTR_PROTO_VERSION, tunnel->version);
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+ NLA_PUT_U32(skb, L2TP_ATTR_CONN_ID, tunnel->tunnel_id);
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+ NLA_PUT_U32(skb, L2TP_ATTR_PEER_CONN_ID, tunnel->peer_tunnel_id);
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+ NLA_PUT_U32(skb, L2TP_ATTR_DEBUG, tunnel->debug);
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+ NLA_PUT_U16(skb, L2TP_ATTR_ENCAP_TYPE, tunnel->encap);
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+
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+ nest = nla_nest_start(skb, L2TP_ATTR_STATS);
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+ if (nest == NULL)
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+ goto nla_put_failure;
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+
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+ NLA_PUT_U64(skb, L2TP_ATTR_TX_PACKETS, tunnel->stats.tx_packets);
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+ NLA_PUT_U64(skb, L2TP_ATTR_TX_BYTES, tunnel->stats.tx_bytes);
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+ NLA_PUT_U64(skb, L2TP_ATTR_TX_ERRORS, tunnel->stats.tx_errors);
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+ NLA_PUT_U64(skb, L2TP_ATTR_RX_PACKETS, tunnel->stats.rx_packets);
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+ NLA_PUT_U64(skb, L2TP_ATTR_RX_BYTES, tunnel->stats.rx_bytes);
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+ NLA_PUT_U64(skb, L2TP_ATTR_RX_SEQ_DISCARDS, tunnel->stats.rx_seq_discards);
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+ NLA_PUT_U64(skb, L2TP_ATTR_RX_OOS_PACKETS, tunnel->stats.rx_oos_packets);
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+ NLA_PUT_U64(skb, L2TP_ATTR_RX_ERRORS, tunnel->stats.rx_errors);
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+ nla_nest_end(skb, nest);
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+
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+ sk = tunnel->sock;
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+ if (!sk)
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+ goto out;
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+
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+ inet = inet_sk(sk);
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+
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+ switch (tunnel->encap) {
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+ case L2TP_ENCAPTYPE_UDP:
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+ NLA_PUT_U16(skb, L2TP_ATTR_UDP_SPORT, ntohs(inet->inet_sport));
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+ NLA_PUT_U16(skb, L2TP_ATTR_UDP_DPORT, ntohs(inet->inet_dport));
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+ NLA_PUT_U8(skb, L2TP_ATTR_UDP_CSUM, (sk->sk_no_check != UDP_CSUM_NOXMIT));
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+ /* NOBREAK */
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+ case L2TP_ENCAPTYPE_IP:
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+ NLA_PUT_BE32(skb, L2TP_ATTR_IP_SADDR, inet->inet_saddr);
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+ NLA_PUT_BE32(skb, L2TP_ATTR_IP_DADDR, inet->inet_daddr);
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+ break;
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+ }
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+
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+out:
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+ return genlmsg_end(skb, hdr);
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+
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+nla_put_failure:
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+ genlmsg_cancel(skb, hdr);
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+ return -1;
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+}
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+
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+static int l2tp_nl_cmd_tunnel_get(struct sk_buff *skb, struct genl_info *info)
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+{
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+ struct l2tp_tunnel *tunnel;
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+ struct sk_buff *msg;
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+ u32 tunnel_id;
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+ int ret = -ENOBUFS;
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+ struct net *net = genl_info_net(info);
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+
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+ if (!info->attrs[L2TP_ATTR_CONN_ID]) {
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+ ret = -EINVAL;
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+ goto out;
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+ }
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+
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+ tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
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+
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+ tunnel = l2tp_tunnel_find(net, tunnel_id);
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+ if (tunnel == NULL) {
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+ ret = -ENODEV;
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+ goto out;
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+ }
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+
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+ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
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+ if (!msg) {
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+ ret = -ENOMEM;
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+ goto out;
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+ }
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+
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+ ret = l2tp_nl_tunnel_send(msg, info->snd_pid, info->snd_seq,
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+ NLM_F_ACK, tunnel);
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+ if (ret < 0)
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+ goto err_out;
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+
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+ return genlmsg_unicast(net, msg, info->snd_pid);
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+
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+err_out:
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+ nlmsg_free(msg);
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+
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+out:
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+ return ret;
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+}
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+
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+static int l2tp_nl_cmd_tunnel_dump(struct sk_buff *skb, struct netlink_callback *cb)
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+{
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+ int ti = cb->args[0];
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+ struct l2tp_tunnel *tunnel;
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+ struct net *net = sock_net(skb->sk);
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+
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+ for (;;) {
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+ tunnel = l2tp_tunnel_find_nth(net, ti);
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+ if (tunnel == NULL)
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+ goto out;
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+
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+ if (l2tp_nl_tunnel_send(skb, NETLINK_CB(cb->skb).pid,
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+ cb->nlh->nlmsg_seq, NLM_F_MULTI,
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+ tunnel) <= 0)
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+ goto out;
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+
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+ ti++;
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+ }
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+
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+out:
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+ cb->args[0] = ti;
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+
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+ return skb->len;
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+}
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+
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+static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *info)
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+{
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+ u32 tunnel_id = 0;
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+ u32 session_id;
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+ u32 peer_session_id;
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+ int ret = 0;
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+ struct l2tp_tunnel *tunnel;
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+ struct l2tp_session *session;
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+ struct l2tp_session_cfg cfg = { 0, };
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+ struct net *net = genl_info_net(info);
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+
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+ if (!info->attrs[L2TP_ATTR_CONN_ID]) {
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+ ret = -EINVAL;
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+ goto out;
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+ }
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+ tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
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+ tunnel = l2tp_tunnel_find(net, tunnel_id);
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+ if (!tunnel) {
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+ ret = -ENODEV;
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+ goto out;
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+ }
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+
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+ if (!info->attrs[L2TP_ATTR_SESSION_ID]) {
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+ ret = -EINVAL;
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+ goto out;
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+ }
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+ session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]);
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+ session = l2tp_session_find(net, tunnel, session_id);
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+ if (session) {
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+ ret = -EEXIST;
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+ goto out;
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+ }
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+
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+ if (!info->attrs[L2TP_ATTR_PEER_SESSION_ID]) {
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+ ret = -EINVAL;
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+ goto out;
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+ }
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+ peer_session_id = nla_get_u32(info->attrs[L2TP_ATTR_PEER_SESSION_ID]);
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+
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+ if (!info->attrs[L2TP_ATTR_PW_TYPE]) {
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+ ret = -EINVAL;
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+ goto out;
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+ }
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+ cfg.pw_type = nla_get_u16(info->attrs[L2TP_ATTR_PW_TYPE]);
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+ if (cfg.pw_type >= __L2TP_PWTYPE_MAX) {
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+ ret = -EINVAL;
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+ goto out;
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+ }
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+
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+ if (tunnel->version > 2) {
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+ if (info->attrs[L2TP_ATTR_OFFSET])
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+ cfg.offset = nla_get_u16(info->attrs[L2TP_ATTR_OFFSET]);
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+
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+ if (info->attrs[L2TP_ATTR_DATA_SEQ])
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|
|
+ 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")
|