net/ieee802154/reassembly.h

   1 #ifndef __IEEE802154_6LOWPAN_REASSEMBLY_H__
   2 #define __IEEE802154_6LOWPAN_REASSEMBLY_H__
   3
   4 #include <net/inet_frag.h>
   5
   6 struct lowpan_create_arg {
   7         __be16 tag;
   8         u16 d_size;
   9         const struct ieee802154_addr_sa *src;
  10         const struct ieee802154_addr_sa *dst;
  11 };
  12
  13 /* Equivalent of ipv4 struct ip
  14  */
  15 struct lowpan_frag_queue {
  16         struct inet_frag_queue  q;
  17
  18         __be16                  tag;
  19         u16                     d_size;
  20         struct ieee802154_addr_sa       saddr;
  21         struct ieee802154_addr_sa       daddr;
  22 };
  23
  24 static inline u32 ieee802154_addr_hash(const struct ieee802154_addr_sa *a)
  25 {
  26         switch (a->addr_type) {
  27         case IEEE802154_ADDR_LONG:
  28                 return (__force u32)((((u32 *)a->hwaddr))[0] ^
  29                                       ((u32 *)(a->hwaddr))[1]);
  30         case IEEE802154_ADDR_SHORT:
  31                 return (__force u32)(a->short_addr);
  32         default:
  33                 return 0;
  34         }
  35 }
  36
  37 static inline bool
  38 ieee802154_addr_addr_equal(const struct ieee802154_addr_sa *a1,
  39                            const struct ieee802154_addr_sa *a2)
  40 {
  41         if (a1->pan_id != a2->pan_id)
  42                 return false;
  43
  44         if (a1->addr_type != a2->addr_type)
  45                 return false;
  46
  47         switch (a1->addr_type) {
  48         case IEEE802154_ADDR_LONG:
  49                 if (memcmp(a1->hwaddr, a2->hwaddr, IEEE802154_ADDR_LEN))
  50                         return false;
  51                 break;
  52         case IEEE802154_ADDR_SHORT:
  53                 if (a1->short_addr != a2->short_addr)
  54                         return false;
  55                 break;
  56         default:
  57                 return false;
  58         }
  59
  60         return true;
  61 }
  62
  63 int lowpan_frag_rcv(struct sk_buff *skb, const u8 frag_type);
  64 void lowpan_net_frag_exit(void);
  65 int lowpan_net_frag_init(void);
  66
  67 #endif /* __IEEE802154_6LOWPAN_REASSEMBLY_H__ */