linux-imx

/*

 *  Internet Control Message Protocol (ICMPv6)

 *  Linux INET6 implementation

 *

 *  Authors:

 *  Pedro Roque     <roque@di.fc.ul.pt>

 *

 *  Based on net/ipv4/icmp.c

 *

 *  RFC 1885

 *

 *  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.

 */

​

/*

 *  Changes:

 *

 *  Andi Kleen      :   exception handling

 *  Andi Kleen          add rate limits. never reply to a icmp.

 *                  add more length checks and other fixes.

 *  yoshfuji        :   ensure to sent parameter problem for

 *                  fragments.

 *  YOSHIFUJI Hideaki @USAGI:   added sysctl for icmp rate limit.

 *  Randy Dunlap and

 *  YOSHIFUJI Hideaki @USAGI:   Per-interface statistics support

 *  Kazunori MIYAZAWA @USAGI:       change output process to use ip6_append_data

 */

​

#define pr_fmt(fmt) "IPv6: " fmt

​

#include <linux/module.h>

#include <linux/errno.h>

#include <linux/types.h>

#include <linux/socket.h>

#include <linux/in.h>

#include <linux/kernel.h>

#include <linux/sockios.h>

#include <linux/net.h>

#include <linux/skbuff.h>

#include <linux/init.h>

#include <linux/netfilter.h>

#include <linux/slab.h>

​

#ifdef CONFIG_SYSCTL

#include <linux/sysctl.h>

#endif

​

#include <linux/inet.h>

#include <linux/netdevice.h>

#include <linux/icmpv6.h>

​

#include <net/ip.h>

#include <net/sock.h>

​

#include <net/ipv6.h>

#include <net/ip6_checksum.h>

#include <net/ping.h>

#include <net/protocol.h>

#include <net/raw.h>

#include <net/rawv6.h>

#include <net/transp_v6.h>

#include <net/ip6_route.h>

#include <net/addrconf.h>

#include <net/icmp.h>

#include <net/xfrm.h>

#include <net/inet_common.h>

#include <net/dsfield.h>

#include <net/l3mdev.h>

​

#include <linux/uaccess.h>

​

/*

 *  The ICMP socket(s). This is the most convenient way to flow control

 *  our ICMP output as well as maintain a clean interface throughout

 *  all layers. All Socketless IP sends will soon be gone.

 *

 *  On SMP we have one ICMP socket per-cpu.

 */

static inline struct sock *icmpv6_sk(struct net *net)

{

    return *this_cpu_ptr(net->ipv6.icmp_sk);

}

​

static int icmpv6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,

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

{

    /* icmpv6_notify checks 8 bytes can be pulled, icmp6hdr is 8 bytes */

    struct icmp6hdr *icmp6 = (struct icmp6hdr *) (skb->data + offset);

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