net/inet/p8022.c

/* */
This source file includes following definitions.
find_8022_client
p8022_rcv
p8022_datalink_header
p8022_proto_init
register_8022_client
   1 #include <linux/netdevice.h>
   2 #include <linux/skbuff.h>
   3 #include "datalink.h"
   4 #include <linux/mm.h>
   5 #include <linux/in.h>
   6 
   7 static struct datalink_proto *p8022_list = NULL;
   8 
   9 static struct datalink_proto *
  10 find_8022_client(unsigned char type)
     /*  */
  11 {
  12         struct datalink_proto   *proto;
  13 
  14         for (proto = p8022_list;
  15                 ((proto != NULL) && (*(proto->type) != type));
  16                 proto = proto->next)
  17                 ;
  18 
  19         return proto;
  20 }
  21 
  22 int
  23 p8022_rcv(struct sk_buff *skb, struct device *dev, struct packet_type *pt)
     /*  */
  24 {
  25         struct datalink_proto   *proto;
  26 
  27         proto = find_8022_client(*(skb->h.raw));
  28         if (proto != NULL) {
  29                 skb->h.raw += 3;
  30                 skb->len -= 3;
  31                 return proto->rcvfunc(skb, dev, pt);
  32         }
  33 
  34         skb->sk = NULL;
  35         kfree_skb(skb, FREE_READ);
  36         return 0;
  37 }
  38 
  39 static void
  40 p8022_datalink_header(struct datalink_proto *dl, 
     /*  */
  41                 struct sk_buff *skb, unsigned char *dest_node)
  42 {
  43         struct device   *dev = skb->dev;
  44         unsigned long   len = skb->len;
  45         unsigned long   hard_len = dev->hard_header_len;
  46         unsigned char   *rawp;
  47 
  48         dev->hard_header(skb->data, dev, len - hard_len,
  49                         dest_node, NULL, len - hard_len, skb);
  50         rawp = skb->data + hard_len;
  51         *rawp = dl->type[0];
  52         rawp++;
  53         *rawp = dl->type[0];
  54         rawp++;
  55         *rawp = 0x03;   /* UI */
  56         rawp++;
  57         skb->h.raw = rawp;
  58 }
  59 
  60 static struct packet_type p8022_packet_type = 
  61 {
  62         0,      /* MUTTER ntohs(ETH_P_IPX),*/
  63         NULL,           /* All devices */
  64         p8022_rcv,
  65         NULL,
  66         NULL,
  67 };
  68  
  69 
  70 void p8022_proto_init(struct net_proto *pro)
     /*  */
  71 {
  72         p8022_packet_type.type=htons(ETH_P_802_2);
  73         dev_add_pack(&p8022_packet_type);
  74 }
  75         
  76 struct datalink_proto *
  77 register_8022_client(unsigned char type, int (*rcvfunc)(struct sk_buff *, struct device *, struct packet_type *))
     /*  */
  78 {
  79         struct datalink_proto   *proto;
  80 
  81         if (find_8022_client(type) != NULL)
  82                 return NULL;
  83 
  84         proto = (struct datalink_proto *) kmalloc(sizeof(*proto), GFP_ATOMIC);
  85         if (proto != NULL) {
  86                 proto->type[0] = type;
  87                 proto->type_len = 1;
  88                 proto->rcvfunc = rcvfunc;
  89                 proto->header_length = 3;
  90                 proto->datalink_header = p8022_datalink_header;
  91                 proto->string_name = "802.2";
  92                 proto->next = p8022_list;
  93                 p8022_list = proto;
  94         }
  95 
  96         return proto;
  97 }
  98
/* */
root/net/inet/p8022.c

DEFINITIONS
