linux-imx

/* GTP according to GSM TS 09.60 / 3GPP TS 29.060

 *

 * (C) 2012-2014 by sysmocom - s.f.m.c. GmbH

 * (C) 2016 by Pablo Neira Ayuso <pablo@netfilter.org>

 *

 * Author: Harald Welte <hwelte@sysmocom.de>

 *     Pablo Neira Ayuso <pablo@netfilter.org>

 *     Andreas Schultz <aschultz@travelping.com>

 *

 * 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/module.h>

#include <linux/skbuff.h>

#include <linux/udp.h>

#include <linux/rculist.h>

#include <linux/jhash.h>

#include <linux/if_tunnel.h>

#include <linux/net.h>

#include <linux/file.h>

#include <linux/gtp.h>

​

#include <net/net_namespace.h>

#include <net/protocol.h>

#include <net/ip.h>

#include <net/udp.h>

#include <net/udp_tunnel.h>

#include <net/icmp.h>

#include <net/xfrm.h>

#include <net/genetlink.h>

#include <net/netns/generic.h>

#include <net/gtp.h>

​

/* An active session for the subscriber. */

struct pdp_ctx {

    struct hlist_node   hlist_tid;

    struct hlist_node   hlist_addr;

​

    union {

        u64     tid;

        struct {

            u64 tid;

            u16 flow;

        } v0;

        struct {

            u32 i_tei;

            u32 o_tei;

        } v1;

    } u;

    u8          gtp_version;

    u16         af;

​

    struct in_addr      ms_addr_ip4;

    struct in_addr      peer_addr_ip4;

​

    struct sock     *sk;

    struct net_device       *dev;

​

    atomic_t        tx_seq;

    struct rcu_head     rcu_head;

};

​

/* One instance of the GTP device. */

struct gtp_dev {

    struct list_head    list;

​

    struct sock     *sk0;

    struct sock     *sk1u;

​

    struct net_device   *dev;

​

    unsigned int        role;

    unsigned int        hash_size;

    struct hlist_head   *tid_hash;

    struct hlist_head   *addr_hash;

};

​

static unsigned int gtp_net_id __read_mostly;

​

struct gtp_net {

    struct list_head gtp_dev_list;

};

​

static u32 gtp_h_initval;

​

static void pdp_context_delete(struct pdp_ctx *pctx);

​