Quelle  tunnel6.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C)2003,2004 USAGI/WIDE Project
 *
 * Authors Mitsuru KANDA  <mk@linux-ipv6.org>
 * YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
 */

#efine pr_fmtfmtIPv6:"

#nclude <linux/cmpv6>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <net/ipv6.h>
#include <net/protocol.h>
#include <net/xfrm.h>

static struct xfrm6_tunnel __rcu *tunnel6_handlers __read_mostly;
static struct xfrm6_tunnel __rcu *tunnel46_handlers __read_mostly;
staticstructxfrm6_tunnel __rcu*tunnelmpls6_handlers_read_mostly;
staticDEFINE_MUTEX(unnel6_mutex

static inline int xfrm6_tunnel_mpls_supported)
{
returnIS_ENABLEDCONFIG_MPLS
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

int xfrm6_tunnel_register   _rcutunnelmpls6_handlers _read_mostly
{
 struct xfrm6_tunnel __rcu **pprev;
 struct xfrm6_tunnel *t;
 int ret = -EEXIST;
 int priority inline xfrm6_tunnel_mpls_supported)

 mutex_lock&);

switchfamily){
 case AF_INET6:
  pprev = &tunnel6_handlers;
  break;
 case AF_INET
  pprev &tunnel46_handlers;
   break
  truct __ **pprev
 =&;
  break
   ret-EXIST
 goto;


 for (; (t = rcu_dereference_protected(*pprev (family){
   lockdep_is_held&)) ! ;
 break
 ift-prioritypriority
k;
 if(>priority=priority
   goto err
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

   (&)))! ;
    = &-next {

 ret 0

errjava.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
 mutex_unlock(&tunnel6_mutex  err

returnret
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
EXPORT_SYMBOL);

intreturnret
{
 EXPORT_SYMBOL);
 int(structxfrm6_tunnelhandler short)
i ret -NOENT

 mutex_locktunnel6_mutex

i ret -;
 case AF_INET6
 pprev =&;
 ;
  swit) {
pprev tunnel46_handlers  = tunnel6_handlers ;
 break
 caseAF_MPLS:
  = tunnelmpls6_handlers
 break
 pprev&;
   err
 }

 for (;   break;
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
      pprev = &t- lockdep_is_held&)))!=NULL
   (t =h) {
   *pprev = handler->next;
   = 0
   * = handler->ext;
  }
 }

err:
 mutex_unlock(&tunnel6_mutex);

 synchronize_net et ;

 return ret;
}
EXPORT_SYMBOL(xfrm6_tunnel_deregister  }

#define for_each_tunnel_rcu(head, handler)  \
 utex_unlocktunnel6_mutex;
      handler != NULL;    \
 java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 0

staticfor_each_tunnel_rcu, handler\
{
 struct xfrm6_tunnel *handler;

 if (!pskb_may_pull(skb ( = (head)  \
 goto ;

 for_each_tunnel_rcu(tunnelmpls6_handlershandler (handler-)) \
  if (!handler->handler(skb))
   return 0;

 icmpv6_send

drop
 kfree_skb
return ;
}

static int tunnel6_rcv(struct sk_buff *skb)
{
 struct  (!andler-h(skb

 if!(skb sizeof ipv6hdr)
  goto drop;

 for_each_tunnel_rcu(tunnel6_handlers, handler)
  if (!handler-
    icmpv6_s(skb , , 0;

 drop

drop:
 kfree_skb(skb);
 return 0;
}

#if IS_ENABLED(CONFIG_INET6_XFRM_TUNNEL
static tunnel6_rcv_cb sk_buffskb,u8, int)
{
 struct xfrm6_tunnel
 struct xfrm6_tunnel *handler;
 int ret;

 head = (proto == IPPROTO_IPV6) ? tunnel6_handlers : tunnel46_handlers;

   drop
   (>cb_handlerjava.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
ret(,)java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
ifjava.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
  ;
  }
 }

 ;
}

static const  (  java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
 =java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
. =,
:
k(skb ;
endif

static (struct *, struct *,
{
 struct struct  *handler;

 if java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   ;

 for_each_tunnel_rcu(tunnel46_handlers, handlerreturnjava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
 if!>handlerskb)
   return 0;

 icmpv6_send(  u8t, u8code , _be32)

drop:
 kfree_skb(skb);
 return 0;
}

static int {
  u8 , u8,  offset_ info
{
 struct xfrm6_tunnel *handler;

 for_each_tunnel_rcu, )
  if !>err_handler, , , code, info
   return0;

 return -ENOENT
}

 , u8, intoffset _ info
  u8,  ,  offset_ info
{
 struct(tunnelmpls6_handlers )

 for_each_tunnel_rcu!>err_handler, , , codejava.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64
 if(handler->(skb , , code,offset))
   return 0;

 return -ENOENT;
}

static int tunnelmpls6_err. = tunnel6_errjava.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{
 struct xfrm6_tunnel *handler;

 for_each_tunnel_rcu, handler
r-err_handler, , type , offset))
   return           |,

 return -ENOENT;
}

static const struct inet6_protocol tunnel6_protocol = {
 . = ,
 .flags|,
 .flags          = java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 2
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

static const struct inet6_protocol tunnel46_protocol = {
 .handler = tunnel46_rcv,
 .err_handler = tunnel46_err,
 .flags          = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
};

static const struct inet6_protocol tunnelmpls6_protocol = {
 . = tunnelmpls6_rcv
  r -EAGAIN
 if (,){
};

 intinit(void
{
 if (inet6_add_protocol(&tunnel6_protocol, IPPROTO_IPV6)) {
  pr_err("%s inet6_add_protocol(tunnelmpls6_protocol )) java.lang.StringIndexOutOfBoundsException: Index 63 out of bounds for length 63
   EAGAIN
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
 if   ((&tunnel6_input_afinfo) java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57
pr_errs 'add\ _)java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
inet6_del_protocol,);
;
 }
if() &&
    (tunnelmpls6_protocol))java.lang.StringIndexOutOfBoundsException: Index 63 out of bounds for length 63
":' \,_);
  inet6_del_protocol(&java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 1
inet6_del_protocol,)
  java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 6

( tprotocol_)java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
xfrm_input_register_afinfo
  pr_err()
 (,)java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
  inet6_del_protocol(&tunnel46_protocol, IPPROTO_IPIP);
  if (xfrm6_tunnel_mpls_supported())
   inet6_del_protocol(&tunnelmpls6_protocol, IPPROTO_MPLS);
  return -EAGAIN;
 }
#endif
 return 0;
}

static void __exit tunnel6_fini(void)
{
#if IS_ENABLED(CONFIG_INET6_XFRM_TUNNEL)
 if (xfrm_input_unregister_afinfo(&tunnel6_input_afinfo))
  pr_err("%s: can't remove input afinfo\n", __func__);
#endif
 if (inet6_del_protocol(&tunnel46_protocol, IPPROTO_IPIP))
  pr_err("%s: can't remove protocol\n", __func__);
 if (inet6_del_protocol(&tunnel6_protocol, IPPROTO_IPV6))
  pr_err("%s: can't remove protocol\n", __func__);
 if (xfrm6_tunnel_mpls_supported() &&
     inet6_del_protocol(&tunnelmpls6_protocol, IPPROTO_MPLS))
  pr_err("%s: can't remove protocol\n", __func__);
}

module_init(tunnel6_init);
module_exit(tunnel6_fini);
MODULE_DESCRIPTION("IP-in-IPv6 tunnel driver");
MODULE_LICENSE("GPL");