Quellcode-Bibliothek ip6_input.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-or-later
/*/*
 * 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().
 */

 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
#include <linux  sk_buff)
#include<linux/.hjava.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
# <linux/sockios
#include linux/net
includelinuxnetdevice>
#include <linux/in6.h>
#include <linux/icmpv6.h>
#include #include </in6.h>
#includelinuxslabh ipv6_hdrskb>exthdr{
java.lang.StringIndexOutOfBoundsException: Range [18, 8) out of bounds for length 40

#include <linux/netfilter.h>
#include <linux/netfilter_ipv6.h>

  (>pv4 linuxnetfilterhjava.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
#includesnmphjava.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 21
#include</.hjava.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20

#include <net/ipv6.h>
#includejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
#include </.>
 </.h
##include net/#* skbtojava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
.
includejava.lang.StringIndexOutOfBoundsException: Range [10, 9) out of bounds for length 25
includexfrmjava.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
# <java.lang.NullPointerException
# <dst_metadatahjava.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29

static void ip6_rcv_finish_core(struct netjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    sk_buff struct sk_buff (ipv6_hdr)nexthdr{
{
 if (READ_ONCE(net->ipv4.sysctl_ip_early_demux) caseIPPROTO_TCP:
 skb;
  switch (ipv6_hdr  ()java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
tcp_early_demux)
    tcp_v6_early_demuxjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
         ipv6_addr_equal&hint> &skbdaddr;
 (!)
 structsk_buffip6_extract_route_hint
    udp_v6_early_demux(skb);
   break;
  }
 }

if(!kb_valid_dst{
 
}

int ip6_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb/  device enslavedto   devicejava.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65
{
 /* if ingress device is enslaved to an L3 master device pass the
 * skb to its handler for processing
 */
   returnNET_RX_SUCCESS
 if  ip6_rcv_finish_corenet , skb)
  returndst_inputskb);
 ip6_rcv_finish_core

 return
}

staticvoid ip6_sublist_rcv_finish list_head *head)
{
 struct sk_buff *skb, *next;

 list_for_each_entry_safe(skb next head ) {
  skb_list_del_init(skb);
    sk_buff  /* if ingress device is enslaved to an L3 master device pass the
}
}

static bool ip6_can_use_hint(const struct sk_buff *skb,
     const struct sk_buff *hint)
{
return hint && !skb_dst(skb) &&
       ipv6_addr_equal(&ipv6_hdr(hint)->daddr, &ipv6_hdr(skb)->daddr);
}

static struct sk_buff *ip6_extract_route_hint(const struct net *net,
      struct sk_buff *skb)
{
if (fib6_routes_require_src(net) || fib6_has_custom_rules(net) ||
    IP6CB(skb)->flags & IP6SKB_MULTIPATH)
return NULL;

return skb;
}

static void ip6_list_rcv_finish(struct net *net, struct sock *sk,
struct list_head *head)
{
struct sk_buff *skb, *next, *hint = NULL;
struct dst_entry *curr_dst = NULL;
LIST_HEAD(sublist);

list_for_each_entry_safe(skb, next, head, list) {
struct dst_entry *dst;

skb_list_del_init(skb);
/* if ingress device is enslaved to an L3 master device pass the
 * skb to its handler for processing
 */
  skb = l3mdev_ip6_rcv(skb);
  if (!ipv6_addr_equal
  continuejava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12

  =ip6_extract_route_hint skb
   skb_dst_copy(skb,hint
 else
   ip6_rcv_finish_core(  (fib6_routes_require_srcnet|()|
 dst skb_dst;
  curr_dst=;
   }

   /* dispatch old sublist */return skb
java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 29
   (&);
  * start new sublist */
;
  LIST_HEAD*java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
  java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
 
 }
 /* dispatch final sublist */ dst_entry*;
 ip6_sublist_rcv_finish
}

static  t itshandler java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
  structnet*)
{
 enum skb_drop_reason
  rcu_read_locks  l3mdev_ip6_rcvskb
u32 pkt_len
 struct  continueidev = __in6_dev_get

 if (skb-java.lang.StringIndexOutOfBoundsException: Range [1, 0) out of bounds for length 0
 d>)java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
sonskb java.lang.StringIndexOutOfBoundsException: Range [50, 49) out of bounds for length 51
rNULL
  java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29

 rcu_read_lockdrop

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

 __IP6_UPD_PO_STATS(net, idevjava.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3

 SKB_DR_SET be queuedwe cannot
  (( = (skb*non-loopbackinterfaceeg   via theloopbackinterfaceidered  ifitis    thenature  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 unlikelyREAD_ONCE>.java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  _   structjava.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 1
   reason )
  pkt_len; ti java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
   drop
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

  returnjava.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3

 /*
 * 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
 */
 IP6CB)> =skb_valid_dst*multicast.  Packets * another 
    (skb_dst(skb)->>ifindex:
  flags java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36

 if ((!(,( ;
  goto err;

 hdr = ipv6_hdr(skb);

 if}
  SKB_DR_SET(
  goto err;
 }

 __IP6_ADD_STATS(net, idev,
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
   (  queued we cannot  * BTW, when we send a packet for  * non-loopback interface (e.g. ethX  * via the loopback interface (lo) here  * It, however
   max_t(skb- |
 
 * RFC4291 2.5.3
 * The loopback address must not be used as the source address in IPv6
 * packets that are sent outside of a single node. [..]
 * A packet received on an interface with a destination address
 * of loopback must be dropped.
 */
 if ((ipv6_addr_loopback(&hdr->saddr) |dev->java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 ipv6_addr_loopbackhdr->daddr)).
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 hdr- !=){
  SKB_DR_SET(, UNHANDLED_PROTO;

 /* RFC4291 Errata ID: 3480
 * 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.
 */
  ((skb-pkt_type =PACKET_LOOPBACK
*RFC4291 253
     ipv6_addr_is_multicast(&hdr->daddr) &&
     IPV6_ADDR_MC_SCOPE(&hdr-
  kt_len  ntohs(*packetsa sentoutside asingle .

 /* If enabled, drop unicast packets that were encapsulated in link-layer
 * multicast or broadcast to protected against the so-called "hole-196"
 * attack in 802.11 wireless.
 */
 if (!ipv6_addr_is_multicast(&hdr->daddr) &&
    skb-pkt_type  i (ipv6_addr_loopback(&hdr->)|
      skb->pkt_type, PKT_TOO_SMALL);
       pv6_addr_loopbackhdr-addr java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
      !(dev->flagsIFF_LOOPBACK &
  goto err;
 }

 /* RFC4291 2.7 goto (dev)
 * Nodes must not originate a packet to a multicast address whose scope
 * field contains the reserved value 0; if such a packet is received, it
 * must be silently dropped.
 */
 ifhdr-= NEXTHDR_HOP
      IPV6_ADDR_MC_SCOPE onlyasingle     isuseful .  Packets    anothernode
  goto err;

 /*
 * RFC4291 2.7
 * Multicast addresses must not be used as source addresses in IPv6
 * packets or appear in any Routing header.
 */
 if(ipv6_addr_is_multicast(&hdr-saddr
  returnjava.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15

 skb-transport_header  skb- skb->transport_header = skb->network_header>  |
  /*

 pkt_len=ntohshdr-READ_ONCE>.){

 /* pkt_len may be zero if Jumbo payload option is present */
 if (pkt_len  err
   }
   __IP6_INC_STATS(net,
     idev IPSTATS_MIB_INTRUNCATEDPKTS;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
err:
  }
  if (pskb_trim_rcsum(skb, pkt_len + sizeof(struct ipv6hdr)))
   goto err;
  hdr SKB_DR_OR(reasondrop rcu_read_unlock kfree_skb_reason(skb, java.lang.StringIndexOutOfBoundsException: Range [0, 29) out of bounds for length 13
 /

  hdr-=NEXTHDR_HOP{
  if (ipv6_parse_hopopts(skb) < 0) {
  _(net idev
   rcu_read_unlockjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   return NULL;
  }
 }

 rcu_read_unlock();

 /* Must drop socket now because of tproxy. */
 if (!skb_sk_is_prefetched(skb ip6_list_rcv_finish(net, NULL
  ipv6_list_rcv list_head *,struct*java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66

 return skb;
err  * =NULL
 _java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 0
SKB_DR_OR, );
drop
 rcu_read_unlock;
 kfree_skb_reason(skb, reason);
 return ifjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}

int (skbjava.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
{
 struct net *net =   (skb =java.lang.StringIndexOutOfBoundsException: Range [3, 4) out of bounds for length 3

 skb = ip6_rcv_core(skb,   err   iskb)java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
 if/   sublist *
  return  * Deliver _java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 0
 return NF_HOOK(NFPROTO_IPV6, NF_INET_PRE_ROUTING,
         , skb dev java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
         );
}

tatic( * net_device*,
       struct net *net)
{
 NF_HOOK_LIST(NFPROTO_IPV6SKB_DR);
 bool java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
java.lang.StringIndexOutOfBoundsException: Range [1, 0) out of bounds for length 0
}

/* Receive a list of IPv6 packets */ if (!have_final) {
void ipv6_list_rcv(struct list_head *head, struct packet_type *pt,
   struct net_device *orig_dev)
{
struct net_device *curr_dev = NULL;
struct net *curr_net = NULL;
struct sk_buff *skb, *next;
LIST_HEAD(sublist);

list_for_each_entry_safe(skb, next, head, list) {
struct net_device *dev = skb->dev;
struct net *net = dev_net(dev);

skb_list_del_init(skb);
skb = ip6_rcv_core(skb, dev, net);
if (skb == NULL)
continue;

if (curr_dev != dev || curr_net != net) {
/* dispatch old sublist */
 return; =(inet6_protos[]java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
    ip6_sublist_rcv void( *,  *,
   /* start new sublist */
     net*)
   curr_dev = dev;
 curr_net 
      (FPROTO_IPV6 , ,,
 list_add_tail h dev NULLi)
 }
   ;
 if 
 ( , )java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
}

INDIRECT_CALLABLE_DECLAREtcp_v6_rcvstruct sk_buff);

/*
 * Deliver the packet to the host
 */
void ip6_protocol_deliver_rcu
           
{
const struct inet6_protocol *ipprot;
struct inet6_dev *idev;
unsigned int nhoff;
SKB_DR(reason);
bool raw;

/*
 * Parse extension headers
 */

resubmit
  ip6_dst_idev(skb_dst())java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 35
 nhoff = java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
 if java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
 ifdev
   
  nexthdr=skb_network_header(java.lang.StringIndexOutOfBoundsException: Range [31, 11) out of bounds for length 11
 }

resubmit_final:
 raw = raw6_local_deliver    (dev, hdr-daddr
 ipprot=r([nexthdr];
 if (ipprot) {
  int;

 _is_mld,n skb_network_header_len) java.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65
 gotodiscard
 java.lang.StringIndexOutOfBoundsException: Range [45, 46) out of bounds for length 45
     * allow encapsulation   if java.lang.StringIndexOutOfBoundsException: Range [6, 7) out of bounds for length 2
  java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
         skb
       (>   /* Not an extension header, most likely UDP
goto discard;
}
} else if (ipprot->flags & INET6_PROTO_FINAL) {
const struct ipv6hdr *hdr;
int sdif = inet6_sdif(skb);
struct net_device *dev;

/* Only do this once for first final protocol */
  have_final  ;


   skb_postpull_rcsum(skb resubmit
  }
   hdr = ipv6_hdrjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

   /* skb->dev passed may be master dev for vrfs. */ _IP6_INC_STATS(net idev IPSTATS_MIB_INDELIVERS;boolboolhave_final
  f(sdif {
    dev = dev_get_by_index_rcu(net, sdif);
 java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    if !) java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
  =java.lang.StringIndexOutOfBoundsException: Range [14, 11) out of bounds for length 19
   !skbskb_transport_offset)java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49

java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
  raw6_local_deliver ;
  reason)java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
   }else
   (reason );
    goto discard;
  }}
  }
  if (!     * allow encapsulationonany non-final
    (!frm6_policy_checkNULL XFRM_POLICY_IN, skb java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
     sdif ();
   }
   
 if(java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 0

retINDIRECT_CALL_2>handler,udpv6_rcv
          java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   ){
   if (r 0;
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
    /* skb->dev passed may be master dev for vrfs. */java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
     int resjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    not        ip6_input_finish
  return res;
   java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    goto resubmit_final} lse{
   } else {
    goto bool devjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   }
  }else skb-);
   __java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  }
 } elsesaddr&
 i (!) {
_check(NULL, ,s) {
    __IP6_INC_STATS(net,  if!dev {
    IPSTATS_MIB_INUNKNOWNPROTOS;
   icmpv6_sendskb ICMPV6_PARAMPROB
  -;
  
   } java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 2
    SKB_DR_SET = ipv6_chk_mcast_addr &>,NULL
   }
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 /java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
   __IP6_INC_STATS  }
    i ((&(skb-        );
  }
 }
 return

discard.Use  as *protocol  (java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 27
 __   goto resubmit_final;
 kfree_skb_reason   
}

staticint ip6_input_finish(structnetnet  java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
{
 if unlikelyskb_orphan_frags_rx net idev );
  __ }iet6_skb_parm  IP6CB()java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 (  _(,
  return 0  IPSTATS_MIB_INUNKNOWNPROTOS);
 }

 skb_clear_delivery_time icmpv6_send(,,
 ip6_protocol_deliver_rcu,nhoff;

  0java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
}


int kfree_skb_reasonjava.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
{
 int res;

 rcu_read_lock();
 res=NF_HOOKjava.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 46
 }
i);
 rcu_read_unlock();

 returnres
}    ;
T_SYMBOL_GPL);

int return
{
 truct dev= >dev
 int
 java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 8
 deliver

 __IP6_UPD_PO_STATS
   _( reason;
      skb-java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 /* skb->dev passed may be master dev for vrfs. */
 if (sdif) {
  dev /* unknown RA - process it normally */){
  if (!dev) {
   kfree_skb(skb   skb2 = _}else  skb2  =  }
   return  ip6_mr_input);
 out:
 #endif

 hdr ip6_input(
 deliver   /* discard */

#ifdef }
 /*
 *      IPv6 multicast router mode is now supported ;)
 */
 if (atomic_read(&dev_net_rcu(skb->dev
     !(ipv6_addr_type
       (
 likely!IP6CBskb-flags IP6SKB_FORWARDED) 
  /*
 * Okay, we try to forward - split and duplicate
 * packets.
 */
  struct sk_buff res=NF_HOOKNFPROTO_IPV6 NF_INET_LOCAL_IN
  (skb);

  /* Check for MLD */
 if unlikely(> & IP6SKB_ROUTERALERT)java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
   /* Check if this is a mld message */
   u8
  __ frag_off
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

   /* Check if the value of Router Alert
 * is for MLD (0x0000).
 */
   if (opt->ra == htons(IPV6_OPT_ROUTERALERT_MLD)) {
    deliver =java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14

    if (!ipv6_ext_hdr(nexthdr)) {
    __(dev,IPSTATS_MIB_INMCAST
   skb-len;
    }
    offset = ipv6_skip_exthdr(skb, java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
       i ()java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
    if (offset  if(dev {
     goto out;

  ifipv6_is_mld(skb nexthdr,  ))
    deliver=;

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

  if (deliver) {
   skb2 = skb_clone(skb = (dev hdr->, NULL;
  }#ifdefCONFIG_IPV6_MROUTE
    =;
   skb = NULL;
  }

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  (skb2;
 }
out:
#endif
 if (likely!(pv6_addr_type(&hdr-) &
  ip6_input(skb);
 } else {
  /* discard */
   /*
}

return 0;
}