linux-imx

/*

 * L2TPv3 IP encapsulation support for IPv6

 *

 * Copyright (c) 2012 Katalix Systems Ltd

 *

 *  This program is free software; you can redistribute it and/or

 *  modify it under the terms of the GNU General Public License

 *  as published by the Free Software Foundation; either version

 *  2 of the License, or (at your option) any later version.

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/icmp.h>

#include <linux/module.h>

#include <linux/skbuff.h>

#include <linux/random.h>

#include <linux/socket.h>

#include <linux/l2tp.h>

#include <linux/in.h>

#include <linux/in6.h>

#include <net/sock.h>

#include <net/ip.h>

#include <net/icmp.h>

#include <net/udp.h>

#include <net/inet_common.h>

#include <net/inet_hashtables.h>

#include <net/inet6_hashtables.h>

#include <net/tcp_states.h>

#include <net/protocol.h>

#include <net/xfrm.h>

​

#include <net/transp_v6.h>

#include <net/addrconf.h>

#include <net/ip6_route.h>

​

#include "l2tp_core.h"

​

struct l2tp_ip6_sock {

    /* inet_sock has to be the first member of l2tp_ip6_sock */

    struct inet_sock    inet;

​

    u32         conn_id;

    u32         peer_conn_id;

​

    /* ipv6_pinfo has to be the last member of l2tp_ip6_sock, see

       inet6_sk_generic */

    struct ipv6_pinfo   inet6;

};

​

static DEFINE_RWLOCK(l2tp_ip6_lock);

static struct hlist_head l2tp_ip6_table;

static struct hlist_head l2tp_ip6_bind_table;

​

static inline struct l2tp_ip6_sock *l2tp_ip6_sk(const struct sock *sk)

{

    return (struct l2tp_ip6_sock *)sk;

}

​

static struct sock *__l2tp_ip6_bind_lookup(const struct net *net,

                       const struct in6_addr *laddr,

                       const struct in6_addr *raddr,

                       int dif, u32 tunnel_id)