net/l2tp/l2tp_core.h

1 /* SPDX-License-Identifier: GPL-2.0-only */
12 #include <net/sock.h>
63  * Is linked into a per-tunnel session list and a per-net ("global") IDR tree.
88 	struct list_head	list;		/* per-tunnel list node */
90 	struct hlist_node	hlist;		/* per-net session hlist */
117 	 * out pseudowire-specific shutdown actions.
124 	 * Pseudowire-specific implementation of debugfs session rendering.
128 	void (*show)(struct seq_file *m, void *priv);
130 	u8			priv[];		/* private data */  member
137 	/* Used only for kernel-created sockets */
155  * Is linked into a per-net list of tunnels.
162 	spinlock_t		list_lock;	/* write-protection for session_list */
178 	struct sock		*sock;		/* parent socket */  member
191 	 * session instance, as well as carry out any pseudowire-specific initialisation.
200 	 * It must call l2tp_session_delete, as well as carry out any pseudowire-specific
208 	return &session->priv[0];  in l2tp_session_priv()
222 struct l2tp_session *l2tp_v3_session_get(const struct net *net, struct sock *sk, u32 session_id);
224 struct l2tp_session *l2tp_session_get(const struct net *net, struct sock *sk, int pver,
226 struct l2tp_session *l2tp_session_get_next(const struct net *net, struct sock *sk, int pver,
232  * Creation of a new instance is a two-step process: create, then register.
257 int l2tp_udp_encap_recv(struct sock *sk, struct sk_buff *skb);
272 int l2tp_ioctl(struct sock *sk, int cmd, int *karg);
274 struct l2tp_tunnel *l2tp_sk_to_tunnel(const struct sock *sk);
278 	switch (session->l2specific_type) {  in l2tp_get_l2specific_len()
292 	dst = sk_dst_get(tunnel->sock);  in l2tp_tunnel_dst_mtu()
305 	struct sock *sk = tunnel->sock;  in l2tp_tunnel_uses_xfrm()
307 	return sk && (rcu_access_pointer(sk->sk_policy[0]) ||  in l2tp_tunnel_uses_xfrm()
308 		      rcu_access_pointer(sk->sk_policy[1]));  in l2tp_tunnel_uses_xfrm()
320 	int opt_len = session->peer_cookie_len + l2tp_get_l2specific_len(session);  in l2tp_v3_ensure_opt_in_linear()
323 		int off = *ptr - *optr;  in l2tp_v3_ensure_opt_in_linear()
326 			return -1;  in l2tp_v3_ensure_opt_in_linear()
328 		if (skb->data != *optr) {  in l2tp_v3_ensure_opt_in_linear()
329 			*optr = skb->data;  in l2tp_v3_ensure_opt_in_linear()
330 			*ptr = skb->data + off;  in l2tp_v3_ensure_opt_in_linear()
338 	MODULE_ALIAS("net-l2tp-type-" __stringify(type))