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Linux/net/802/p8023.c

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  1 /*
  2  *      NET3:   802.3 data link hooks used for IPX 802.3
  3  *
  4  *      This program is free software; you can redistribute it and/or
  5  *      modify it under the terms of the GNU General Public License
  6  *      as published by the Free Software Foundation; either version
  7  *      2 of the License, or (at your option) any later version.
  8  *
  9  *      802.3 isn't really a protocol data link layer. Some old IPX stuff
 10  *      uses it however. Note that there is only one 802.3 protocol layer
 11  *      in the system. We don't currently support different protocols
 12  *      running raw 802.3 on different devices. Thankfully nobody else
 13  *      has done anything like the old IPX.
 14  */
 15 
 16 #include <linux/in.h>
 17 #include <linux/mm.h>
 18 #include <linux/module.h>
 19 #include <linux/netdevice.h>
 20 #include <linux/skbuff.h>
 21 #include <linux/slab.h>
 22 
 23 #include <net/datalink.h>
 24 #include <net/p8022.h>
 25 
 26 /*
 27  *      Place an 802.3 header on a packet. The driver will do the mac
 28  *      addresses, we just need to give it the buffer length.
 29  */
 30 static int p8023_request(struct datalink_proto *dl,
 31                          struct sk_buff *skb, unsigned char *dest_node)
 32 {
 33         struct net_device *dev = skb->dev;
 34 
 35         dev_hard_header(skb, dev, ETH_P_802_3, dest_node, NULL, skb->len);
 36         return dev_queue_xmit(skb);
 37 }
 38 
 39 /*
 40  *      Create an 802.3 client. Note there can be only one 802.3 client
 41  */
 42 struct datalink_proto *make_8023_client(void)
 43 {
 44         struct datalink_proto *proto = kmalloc(sizeof(*proto), GFP_ATOMIC);
 45 
 46         if (proto) {
 47                 proto->header_length = 0;
 48                 proto->request       = p8023_request;
 49         }
 50         return proto;
 51 }
 52 
 53 /*
 54  *      Destroy the 802.3 client.
 55  */
 56 void destroy_8023_client(struct datalink_proto *dl)
 57 {
 58         kfree(dl);
 59 }
 60 
 61 EXPORT_SYMBOL(destroy_8023_client);
 62 EXPORT_SYMBOL(make_8023_client);
 63 
 64 MODULE_LICENSE("GPL");
 65 

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