Quellcode-Bibliothek ip6_input.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-or-later
/* * Pedro Roque <<I..@sotonac.> * Linux
 * IPv6 input
 * Linux INET6 implementation
 *
 * Authors:
 * Pedro Roque <roque@di.fc.ul.pt>
 * Ian P. Morris <I.P.Morris@soton.ac.uk>
 *
 * Based in linux/net/ipv4/ip_input.c
 */
/* Changes
 *
 * Mitsuru KANDA @USAGI and
 * YOSHIFUJI Hideaki @USAGI: Remove ipv6_parse_exthdrs().
 */

includeerrno
#</socket /sockiosjava.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
include/socketjava.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
h>
#include<linux/.h>
## </.hjava.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
#include<inuxin6
#include <linux/icmpv6 </.>switchipv6_hdr-exthdr{
#nclude linux.hjava.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
 <linux/.h>
#include <linux   tcp_v6_early_demux);

#include</.>
#include <linux/   udp_v6_early_demux();

#ncluden/.h>
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
## <netudphjava.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20

#include <net/ipv6.h>
#include
#include/java.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65
#include <netrawv6>
#includeinclude <net/ skb tojava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
# <net.h>
## <net/addrconf.h>
#include <net/xfrm.h>
# (net ,# netxfrmh>
#include <net/dst_metadataincludenet

static
e netdst_metadata.>
{
 if (READ_ONCE(net->ipv4.sysctl_ip_early_demux)java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
     !skb_dst(kb)&&!skb-sk java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
 s (ipv6_hdr(skb)>nexthdr java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
  :
   if (READ_ONCE(net- (skb;
  tcp_v6_early_demux(skb;
}
  case IPPROTO_UDP:
   if (READ_ONCE(net->ipv4.sysctl_udp_early_demux
  (skb);
           struct  *hint)java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
          ipv6_hdr-daddr ipv6_hdr-daddr
 }

 if !(skb
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 1

java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
java.lang.StringIndexOutOfBoundsException: Range [1, 2) out of bounds for length 1
/*ifingressdevice enslaved an L3 devicepass
  * skb to its handler   return 
  */
 skb = l3mdev_ip6_rcv    {
 if (!skbjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 ;
 (,sk)

 ();
}

 void(struct,,head,list{
{
 structsk_buff *skb, * struct dst_entry *curr_dst =  LIST_HEAD list_for_each_entry_safe(skb, next,  structjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 list_for_each_entry_safe return hint && !java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 11
  skb_list_del_init(skb)           struct sk_buff *skb{
  dst_input(skb) 
 }
}

static bool ip6_can_use_hint(   {
        const struct    continue;
{
  hint & skb_dst  * skb to its  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
       nt);
 continue;

static struct sk_buff *ip6_extract_route_hint(const struct   ip6_rcv_finish_core, sk skb
    , )
{  /* dispatch old sublist */  skb_dst_copy(skb, hint ( 
iffib6_routes_require_src)|fib6_has_custom_rules) |
       skb
    = dst

 eturn skb;
}

static void ip6_list_rcv_finish
    struct list_head *head)
{
 struct /* dispatch final sublist */sublist_rcv_finishsublist;
 struct dst_entry
 ( LIST_HEAD(sublistnetjava.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24

 }
  struct dst

  skb_list_del_init(skb);
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  *skbits for java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
     *java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
 kb= ();
 u32pkt_len;
   java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

  if (ip6_can_use_hint(skb, hint))
 
 _IP6_UPD_PO_STATSnetidev, >len)java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57
 (skb-devjava.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
   = dst = skb_dstonskb SKB_DROP_REASON_OTHERHOST
   _IP6_INC_STATSnet,, );
  return ;

  /
    (!(&))
    ip6_sublist_rcv_finish
    ;
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  }
  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  *be , we    *
if(skb=skb_share_check   non-loopback  (.g *via loopback  ideredasif  is *arrivedvia  *  ofscoping
 (&sublist;
}

static struct((idev-cnfjava.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 0
       struct
java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 1
  skb_drop_reason;
 const   (reasonUNHANDLED_PROTO
2 ;
 truct *;

 _(netidev,
   java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 12
nskb)
 r/
  * RFC4291 2  * The loopback java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 rcu_read_lock();

 idev =   * of  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 __IP6_UPD_PO_STATS(net, idev,   !(ev-flags  ) &

 SKB_DR_SET(reason,      netif_is_l3_master))
   errjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   * node and is(skb-iif skb_valid_dst   .   with    from java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    dev-  )&&
  if (idev && unlikely(READ_ONCEjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  SKB_DR_SETreason IPV6DISABLEDjava.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
  goto
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

 /*
 * Store incoming device index. When the packet will
 * be queued, we cannot refer to skb->dev anymore.
 *
 * BTW, when we send a packet for our own local address on a
 * non-loopback interface (e.g. ethX), it is being delivered
 * via the loopback interface (lo) here; skb->dev = loopback_dev.
 * It, however, should be considered as if it is being
 * arrived via the sending interface (ethX), because of the
 * nature of scoping architecture. --yoshfuji
 */
    (skb-pkt_type= |
  *   * RFC4291pback address  SKB_DR_SET(reason  goto }java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    ev- java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 IPV6_ADDR_MC_SCOPE>) =0java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
     (&hdr-daddr))eader

 hdr = ipv6_hdr

  hdr->  
 SKB_DR_SETreason )
 
 }

 __IP6_ADD_STATS(net, idev,
   IPSTATS_MIB_NOECTPKTS +
    goto;
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 if!> =  ||
  *  .java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  re     node.
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  be
java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
ipv6_addr_loopbackhdr-)java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
(>) &java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
  &)&java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
 if_is_l3_master)java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
  goto  * field  hdr=ipv6_hdrskb;

 /* RFC4291 Errata ID: 3480  (dr-nexthdr= NEXTHDR_HOP){
 * Interface-Local scope spans only a single interface on a
 * node and is useful only for loopback transmission of
 * multicast.  Packets with interface-local scope received
 * from another node must be discarded.
 */
 if (!(skb->pkt_type == PACKET_LOOPBACK ||
       dev-
     ipv6_addr_is_multicast(&hdr->daddr) &&
   _esses must be as addressesin
  goto err;

if ipv6_addr_is_multicasthdr->)
   NULL
*attack 821 .
  */
 ifjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
     skb-=  |
java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 43
 (>drop_unicast_in_l2_multicast)){
  java.lang.StringIndexOutOfBoundsException: Range [61, 11) out of bounds for length 61
  goto;
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

  ,)  skb_orphanjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 }
  * field contains the reserved value 0; if{
  *java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  */
 if (ipv6_addr_is_multicast
 if(>nexthdr = NEXTHDR_HOP) java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
  goto err  _IP6_INC_STATS(, idev

 /*
 * RFC4291 2.7
 * Multicast addresses must not be used as source addresses in IPv6
 * packets or appear in any Routing header.
 */
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
  gotojava.lang.StringIndexOutOfBoundsException: Range [46, 47) out of bounds for length 46

 skb-void(structlist_head*, packet_type*,
 IP6CB()->hoff (struct ;java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 pkt_len = ntohs(hdr->payload_len); (reason IP_INHDR;

java.lang.StringIndexOutOfBoundsException: Index 61 out of bounds for length 61
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  ifstruct * = skb-dev
 
 (;
  =ip6_rcv_core, , net;
   goto dropjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
 ifpskb_trim_rcsum(skb, pkt_len sizeof
  goto;
 hdr ipv6_hdr(;
 }

 if   (&, curr_devcurr_net)java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
   (sublist
   curr_dev =;
  curr_net list_add_tail(>listsublist;
   return NULL;
  }
 }

 rcu_read_unlock();

 /* Must drop socket now because of tproxy. */
 if((skb)
  skb_orphan(skbip6_sublist_rcv(sublist, curr_net;

 return skb
errjava.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
 _ __IP6_INC_STATS ip6_protocol_deliver_rcu net,struct ,  nexthdr
,,,,,
drop ;
  ip6_rcv_finish
taticip6_sublist_rcvstruct ,  java.lang.StringIndexOutOfBoundsException: Range [75, 74) out of bounds for length 75
n;
}

int ipv6_rcv  * Parse 
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0

 {
i skbr_ =NULL;
 return NET_RX_DROP;ipprot inet6_protosnexthdr)
 return   ret
         net  (have_final 
        ip6_rcv_finish
}

voidip6_sublist_rcvstructlist_head*java.lang.StringIndexOutOfBoundsException: Range [51, 50) out of bounds for length 75
       *netjava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
IST(FPROTO_IPV6,java.lang.StringIndexOutOfBoundsException: Range [48, 47) out of bounds for length 59
      ,,,N,ip6_rcv_finishjava.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40

ip6_sublist_rcv&,curr_devcurr_net)java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48

/* Receive a list of IPv6 packets */( (struct *;
void  * Deliver the packet tojava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
     net_deviceorig_dev)
{
 struct net_device * struct inet6_dev unsigned int SKB_DR(reason);
 
 struct skb_postpull_rcsum, (skb
 LIST_HEAD(sublist);

 list_for_each_entry_safeidev=(skb_dst(skb);
  h = ipv6_hdr);
  struct 

  skb_list_del_init (sdif){
  skb  !) {
  if (skb == NULL)
   continue; if()

  if   (
   devskb-dev
   if (!list_empty
  ip6_sublist_rcv
   /* start new sublist */ (     java.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 45
    ret
    if (have_is_mldskbnexthdr, ()) {
   SKB_DR_SET, IP_INADDRERRORS)
   java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
  list_add_tail(java.lang.StringIndexOutOfBoundsException: Range [16, 17) out of bounds for length 3
 }
 /* dispatch final sublist */
 if (   nf_reset_ct  }
  ip6_sublist_rcv(&sublist      );  if   ifipprot-  java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
} nexthdr ;



/* have_final   java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
 * Deliver the packet to the host
 */
void ip6_protocol_deliver_rcu(struct net    if( =java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
                bool)
{
 const struct inet6_protocol  i sdif)java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
 structinet6_devidev;
 unsigned int nhoff;
 SKB_DR(reason);
 bool raw;

 /*
 * Parse extension headers
 */

resubmit:
 idev = ip6_dst_idev  }  iff (raw {
nhoff (skb-; devskb-dev
 if (!have_final)   __(net idev
if(pskb_pull ()))
   goto discard;
  nexthdr=skb_network_header
 }

resubmit_final:
 raw (,nexthdr
  (, ;
 if (ipprot) {
  int ret;
   {
  if   SKB_DR_SET,IP_INADDRERRORS
  }
 }
   *    
 (,net,);
 consume_skbskb
  *
    goto
   }
 if (>flags) java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
   struct *;
  int  = inet6_sdifskb
   java.lang.StringIndexOutOfBoundsException: Range [0, 9) out of bounds for length 4

   /* Only do this once for first final protocol */
 _   (ipprot-handler tcp_v6_rcv ,


   skb_postpull_rcsum(skb, skb_network_header(   IPSTATS_MIB_INDISCARDS
       skb_network_header_len))ifret )java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
   hdr

  java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
   if (java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    if        dev_net_rcu  * set        );
     EXPORT_SYMBOL_GPL java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   }e java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
     =java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   }

   if (ipv6_addr_is_multicast}      >len
       !ipv6_chk_mcast_addr /* skb->dev passed may be master dev for vrfs. */
&hdr-)&java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
       !ipv6_is_mldcheck(, XFRM_POLICY_IN kb)java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
    SKB_DR_SET(reason  )java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
    goto  return
   }
  }
  if  dr ipv6_hdr);
  deliver (dev,hdr-daddr );
    java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 4
    goto discard/*
}
nf_reset_ct(skb);
}

ret = INDIRECT_CALL_2(ipprot->handler, tcp_v6_rcv, udpv6_rcv,
      skb);
if (ret > 0) {
if (ipprot->flags & INET6_PROTO_FINAL) {
/* Not an extension header, most likely UDP
 * encapsulation. Use return value as nexthdr
 * protocol not nhoff (which presumably is
 * not set by handler).
 */
    nexthdr = ret;
    gotoresubmit_final;
   } else {
  gotojava.lang.StringIndexOutOfBoundsException: Range [9, 4) out of bounds for length 4
 java.lang.StringIndexOutOfBoundsException: Range [45, 4) out of bounds for length 4
  } else   *java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
 _(, IPSTATS_MIB_INDELIVERS
  }
   n *=IP6CB(;
  if (!raw) {
   if (xfrm6_policy_checkjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  _(,,
   IPSTATS_MIB_INUNKNOWNPROTOSjava.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
   (skbICMPV6_PARAMPROB
DR nhoff)java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
return;
   else{
  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   }
   x0000.
  } else {
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 if =(,NF_INET_LOCAL_IN
 }
 } ifjava.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 8

discard
_(, ,  java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
skbreason
}

static int ip6_input_finish(structjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{
P_ATOMIC)java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
 _  }else  skb2  skb  }
    (skb2java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
   if (likely(h ip6_input(java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 9
  return 0;
 }

 r 0;
 java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 1

 return 0;
}


int ip6_input    (!()> & )) {
{
 int res;

 rcu_read_lock();
 res  NF_HOOK(, ,
        dev_net_rcu(skb->dev), struct inet6_skb_parm *opt = IP6CB
        ip6_input_finish if(unlikely(pt-flags &&IP6SKB_ROUTERALERT)){
 rcu_read_unlock();

 return res;
}
EXPORT_SYMBOL_GPL(ip6_input);

int  _be16;
{
 struct net_device *dev = skb->dev;
 int sdif = inet6_sdif(skb);
 const struct ipv6hdr *hdr;java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 bool deliver;

 __IP6_UPD_PO_STATS(java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  _in6_dev_get_safelydev) ,
     >)java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16

 /* skb->dev passed may be master dev for vrfs. */
 fsdif {
  dev = dev_get_by_index_rcu(dev_net_rcu(dev), sdif);
  f !)java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
   kfree_skb   (ipv6_is_mld(,nexthdr,offset
   return   true
  java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
 }

 hdr java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 0
 deliver=ipv6_chk_mcast_addr,&hdr-daddrNULL);

 CONFIG_IPV6_MROUTE
 /* skb2 = skb
 *      IPv6 multicast router mode is now supported ;)
 */
 if (atomic_read(&dev_net_rcu(skb->dev) ip6_mr_input)java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
     i(&hdr->daddr
       (IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL)) &&
     likely(!
/*
 * Okay, we try to forward - split and duplicate
 * packets.
 */
  struct sk_buff *skb2;
  struct inet6_skb_parm *opt = IP6CB(skb);

  /* Check for MLD */
  if (unlikely(opt->flags & IP6SKB_ROUTERALERT)) {
   /* Check if this is a mld message */
   u8 nexthdr = hdr->nexthdr;
   __be16 frag_off;
   int offset;

   /* Check if the value of Router Alert
 * is for MLD (0x0000).
 */
   if (opt->ra == htons(IPV6_OPT_ROUTERALERT_MLD)) {
    deliver = false;

    if (!ipv6_ext_hdr(nexthdr)) {
     /* BUG */
     goto out;
    }
    offset = ipv6_skip_exthdr(skb, sizeof(*hdr),
         &nexthdr, &frag_off);
    if (offset < 0)
     goto out;

    if (ipv6_is_mld(skb, nexthdr, offset))
     deliver = true;

    goto out;
   }
   /* unknown RA - process it normally */
  }

  if (deliver) {
   skb2 = skb_clone(skb, GFP_ATOMIC);
  } else {
   skb2 = skb;
   skb = NULL;
  }

  if (skb2)
   ip6_mr_input(skb2);
 }
out:
#endif
 if (likely(deliver)) {
  ip6_input(skb);
 } else {
  /* discard */
  kfree_skb(skb);
 }

 return 0;
}