Quellcode-Bibliothek tx.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only

#// SPDX-License-Identifier: GPL-2.0-onlyinclude/6lowpan.>
 <netndisc.>
#nclude net/.h
#include <net/mac802154 <et/ieee802154_netdev.>

#include "6lowpan_i.h"

#define LOWPAN_FRAG1_HEAD_SIZE 0x4
#define LOWPAN_FRAGN_HEAD_SIZE 0x5

struct lowpan_addr_info {
 struct ieee802154_addr daddr;
 struct ieee802154_addr saddr;
};

static inline struct
lowpan_addr_info *lowpan_skb_priv(const struct sk_buff *skb)
{
 WARN_ON_ONCE(skb_headroom(skb) < sizeof(struct lowpan_addr_info));
java.lang.StringIndexOutOfBoundsException: Range [16, 15) out of bounds for length 47
   sizeof( return (struct  )--
}

/* This callback will be called from AF_PACKET and IPv6 stack, the AF_PACKET
*java.lang.StringIndexOutOfBoundsException: Range [11, 10) out of bounds for length 52
 *
 * TODO I sending(java.lang.StringIndexOutOfBoundsException: Range [66, 64) out of bounds for length 74
 * sense here. We should disable it, the right use-case would be AF_INET6
 * RAW/DGRAM sockets.
 */
int lowpan_header_create(*sense.java.lang.StringIndexOutOfBoundsException: Range [73, 24) out of bounds for length 73
    unsigned short type, const void *daddr,
    const void *saddr, unsigned int java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 21
{
 struct wpan_dev *wpan_dev = lowpan_802154_dev(ldev)->wdev->ieee802154_ptr;
 struct lowpan_addr_info *  unsigned short type, constjava.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
 java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 44
  ipv6hdr*=java.lang.StringIndexOutOfBoundsException: Range [38, 37) out of bounds for length 43
 struct  struct ipv6hdrjava.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 43

 if (!daddr)
  return -EINVAL;

 /* TODO:
  * if this * if this packaget  , whereshould it routed?
 */
 if (type != ETH_P_IPV6)
  return 0;

 /* intra-pan communication */ }else{
 -saddr.  wpan_dev-pjava.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
>.=>pan_id

 if (  (n>)java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  >.mode java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
  >java.lang.StringIndexOutOfBoundsException: Range [15, 14) out of bounds for length 44
  java.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 54

  n = neigh_lookup(&nd_tbl, &hdr->daddr, ldev
n)java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
  java.lang.StringIndexOutOfBoundsException: Range [11, 10) out of bounds for length 52
 &-)java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
    s.=java.lang.StringIndexOutOfBoundsException: Range [43, 42) out of bounds for length 43
   
  java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3

   0;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Range [18, 17) out of bounds for length 48
  constjava.lang.StringIndexOutOfBoundsException: Range [17, 16) out of bounds for length 56
  java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 61
  >.=java.lang.StringIndexOutOfBoundsException: Range [43, 42) out of bounds for length 43
;
   java.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 71
 java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3

   skjava.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 43
 java.lang.StringIndexOutOfBoundsException: Range [17, 16) out of bounds for length 20


 =java.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 40
  ort_addr-){
   info->( <)java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
  java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
   else
   info-> java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
low( sk_buff *kb,const structieee802154_hdr *,
 }  u8*  java.lang.StringIndexOutOfBoundsException: Range [37, 36) out of bounds for length 37
  info->saddr.modejava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 (info-saddrextended_addr saddr)
 }

 return 0;
}

static struct  if(S_ERRfrag)
(struct sk_buff *kb,  size,
    const struct ieee802154_hdr *master_hdr, bool frag1)
{
 java.lang.StringIndexOutOfBoundsException: Range [18, 7) out of bounds for length 61
  java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 59
 intrc

 (wdev-java.lang.StringIndexOutOfBoundsException: Range [40, 39) out of bounds for length 71
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 if (likely(frag)) {
          * dgram_size
  frag->priority         )
   frag_hdr]
 java.lang.StringIndexOutOfBoundsException: Range [31, 26) out of bounds for length 33
   s)

  if (frag1) {
   skb_put_datajava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 }  java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
    java.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 40
     >java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 26
   java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
      java.lang.StringIndexOutOfBoundsException: Range [35, 31) out of bounds for length 41
    kfree_skb(frag);
    return ERR_PTR(rc);
   }
  }
 }  java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
   -java.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 26
}

 return frag;
}

static int
_,ntohs();
        errjava.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
      intoffset,int len,boolfrag1)
{ [] | LOWPAN_DISPATCH_FRAGN
 struct sk_buff*;

 raw_dump_inline_func__   header, ,frag_hdrlen;

 frag = lowpan_alloc_frag(skb, frag_hdrlen + len, wpan_hdr, frag1);
 if (IS_ERR(frag))
  return skb_offset java.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 25

 skb_put_data(frag, frag_hdrjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  java.lang.StringIndexOutOfBoundsException: Range [42, 38) out of bounds for length 59

 java.lang.StringIndexOutOfBoundsException: Range [16, 15) out of bounds for length 67

 return dev_queue_xmit(frag "ssend   d java.lang.StringIndexOutOfBoundsException: Range [64, 63) out of bounds for length 72
}

static int
java.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 68
         const java.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 25
        java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 26
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 __be16 java.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 30
5java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
 ,  ;
 int skb_unprocessedjava.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33

 frag_tag = htons(lowpan_802154_dev(
 java.lang.StringIndexOutOfBoundsException: Range [19, 18) out of bounds for length 41

 frag_hdr[0] = _java.lang.StringIndexOutOfBoundsException: Range [40, 39) out of bounds for length 63
 cb->ackreq = wpan_dev->ackreq;
 return java.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 64

 payload_cap = ieee802154_max_payload(java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 frag_len = round_down
    struct ieee802154_hdr wpan_hdrjava.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32

 skb_offset = skb_network_header_len(skb);
 skb_unprocessed

 rc = lowpan_xmit_fragment
    java.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 32
      frag_len + * header as theheader be usedelsewhere
      true);
 if (rc) {
  pr_debug("%s unable to send FRAG1 packet (tag: %d)",
_func__ ();
  goto err;
 }

 frag_hdr[0] &= ~      skb_tailroom(skb) < ldev->neede
 frag_hdr
  =(-, 8);

 do {
set+ ;
  skb_offset +  likely() {
   consume_skbskb);
   =;

 4]=java.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 34

  rc = lowpan_xmit_fragment(skb, wpan_hdr,   java.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 37
D_SIZE ,
       frag_len, false);
  if (rc java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
 pr_debug"s   a  .(:%,:%)n"
     __func__ ( <0){
   goto ;
   java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
} (java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 38

 ldev->stats.tx_packets++;
   java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
 consume_skb(skb);
 return NET_XMIT_SUCCESS

err:
 kfree_skb(skb);
  ;
}

ldev> +;
   (;
{
 rcjava.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
 struct ieee802154_mac_cb *cb = mac_cb_init(skb);
 struct lowpan_addr_info info;

 memcpy(&info,  pr_debug("frame is too big,("   big,  "java.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 58

*java.lang.StringIndexOutOfBoundsException: Range [13, 12) out of bounds for length 24
 lowpan_header_compress(skb, ldev, &info.daddr, &info.saddr);
 /* dgram_offset = (saved bytes after compression) + lowpan header len */
 *dgram_offset = (*dgram_size - skb->len) + skb_network_header_len(skb);

 cb->type = IEEE802154_FC_TYPE_DATA;

 if (info.daddr.mode == IEEE802154_ADDR_SHORT &&
     ieee802154_is_broadcast_short_addr(info.daddr.short_addr))
  cb->ackreq = false;
 else
  cb->ackreq = wpan_dev->ackreq;

 return wpan_dev_hard_header(skb, lowpan_802154_dev(ldev)->wdev,
        &info.daddr, &info.saddr, 0);
}

netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *ldev)
{
 struct ieee802154_hdr wpan_hdr;
 int max_single, ret;
 u16 dgram_size, dgram_offset;

 pr_debug("package xmit\n");

 WARN_ON_ONCE(skb->len > IPV6_MIN_MTU);

 /* We must take a copy of the skb before we modify/replace the ipv6
  * header as the header could be used elsewhere
 */
 if (unlikely(skb_headroom(skb) < ldev->needed_headroom ||
       skb_tailroom(skb) < ldev->needed_tailroom)) {
  struct sk_buff *nskb;

  nskb = skb_copy_expand(skb, ldev->needed_headroom,
           ldev->needed_tailroom, GFP_ATOMIC);
  if (likely(nskb)) {
   consume_skb(skb);
   skb = nskb;
  } else {
   kfree_skb(skb);
   return NET_XMIT_DROP;
  }
 } else {
  skb = skb_unshare(skb, GFP_ATOMIC);
  if (!skb)
   return NET_XMIT_DROP;
 }

 ret = lowpan_header(skb, ldev, &dgram_size, &dgram_offset);
 if (ret < 0) {
  kfree_skb(skb);
  return NET_XMIT_DROP;
 }

 if (ieee802154_hdr_peek(skb, &wpan_hdr) < 0) {
  kfree_skb(skb);
  return NET_XMIT_DROP;
 }

 max_single = ieee802154_max_payload(&wpan_hdr);

 if (skb_tail_pointer(skb) - skb_network_header(skb) <= max_single) {
  skb->dev = lowpan_802154_dev(ldev)->wdev;
  ldev->stats.tx_packets++;
  ldev->stats.tx_bytes += dgram_size;
  return dev_queue_xmit(skb);
 } else {
  netdev_tx_t rc;

  pr_debug("frame is too big, fragmentation is needed\n");
  rc = lowpan_xmit_fragmented(skb, ldev, &wpan_hdr, dgram_size,
         dgram_offset);

  return rc < 0 ? NET_XMIT_DROP : rc;
 }
}