linux-imx

/*

 * IP Payload Compression Protocol (IPComp) for IPv6 - RFC3173

 *

 * Copyright (C)2003 USAGI/WIDE Project

 *

 * Author   Mitsuru KANDA  <mk@linux-ipv6.org>

 *

 * 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.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, see <http://www.gnu.org/licenses/>.

 */

/*

 * [Memo]

 *

 * Outbound:

 *  The compression of IP datagram MUST be done before AH/ESP processing,

 *  fragmentation, and the addition of Hop-by-Hop/Routing header.

 *

 * Inbound:

 *  The decompression of IP datagram MUST be done after the reassembly,

 *  AH/ESP processing.

 */

​

#define pr_fmt(fmt) "IPv6: " fmt

​

#include <linux/module.h>

#include <net/ip.h>

#include <net/xfrm.h>

#include <net/ipcomp.h>

#include <linux/crypto.h>

#include <linux/err.h>

#include <linux/pfkeyv2.h>

#include <linux/random.h>

#include <linux/percpu.h>

#include <linux/smp.h>

#include <linux/list.h>

#include <linux/vmalloc.h>

#include <linux/rtnetlink.h>

#include <net/ip6_route.h>

#include <net/icmp.h>

#include <net/ipv6.h>

#include <net/protocol.h>

#include <linux/ipv6.h>

#include <linux/icmpv6.h>

#include <linux/mutex.h>

​

static int ipcomp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,

                u8 type, u8 code, int offset, __be32 info)

{

    struct net *net = dev_net(skb->dev);

    __be32 spi;

    const struct ipv6hdr *iph = (const struct ipv6hdr *)skb->data;

    struct ip_comp_hdr *ipcomph =

        (struct ip_comp_hdr *)(skb->data + offset);