net/tcp/eth.c

/* */
This source file includes following definitions.
print_eth
eth_hard_header
eth_rebuild_header
eth_add_arp
eth_type_trans
   1 /* eth.c */
   2 /*
   3     Copyright (C) 1992  Ross Biro
   4 
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2, or (at your option)
   8     any later version.
   9 
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14 
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 
  18 
  19     The Author may be reached as bir7@leland.stanford.edu or
  20     C/O Department of Mathematics; Stanford University; Stanford, CA 94305
  21 */
  22 
  23 #include <asm/segment.h>
  24 #include <asm/system.h>
  25 #include <linux/types.h>
  26 #include <linux/kernel.h>
  27 #include <linux/sched.h>
  28 #include <linux/string.h>
  29 #include <linux/mm.h>
  30 #include <linux/socket.h>
  31 #include <netinet/in.h>
  32 #include <asm/memory.h>
  33 #include "dev.h"
  34 #include "eth.h"
  35 #include "timer.h"
  36 #include "ip.h"
  37 #include "tcp.h"
  38 #include "sock.h"
  39 #include <linux/errno.h>
  40 #include "arp.h"
  41 
  42 #undef ETH_DEBUG
  43 #ifdef ETH_DEBUG
  44 #define PRINTK printk
  45 #else
  46 #define PRINTK dummy_routine
  47 #endif
  48 
  49 void
  50 print_eth (struct enet_header *eth)
     /*  */
  51 {
  52   int i;
  53   PRINTK ("ether source addr: ");
  54   for (i =0 ; i < ETHER_ADDR_LEN; i++)
  55     {
  56       PRINTK ("0x%2X ",eth->saddr[i]);
  57     }
  58   PRINTK ("\n");
  59 
  60   PRINTK ("ether dest addr: ");
  61   for (i =0 ; i < ETHER_ADDR_LEN; i++)
  62     {
  63       PRINTK ("0x%2X ",eth->daddr[i]);
  64     }
  65   PRINTK ("\n");
  66   PRINTK ("ethertype = %X\n",net16(eth->type));
  67 }
  68 
  69 int
  70 eth_hard_header (unsigned char *buff, struct device *dev,
     /*  */
  71                  unsigned short type, unsigned long daddr,
  72                  unsigned long saddr, unsigned len)
  73 {
  74   struct enet_header *eth;
  75   eth = (struct enet_header *)buff;
  76   eth->type = net16(type);
  77   memcpy (eth->saddr, dev->dev_addr, dev->addr_len);
  78   if (daddr == 0)
  79     {
  80       memset (eth->daddr, 0xff, dev->addr_len);
  81       return (14);
  82     }
  83   if (!arp_find (eth->daddr, daddr, dev, saddr))
  84     {
  85       return (14);
  86     }
  87   else
  88     {
  89       *(unsigned long *)eth->saddr = saddr;
  90        return (-14);
  91     }
  92 }
  93 
  94 int
  95 eth_rebuild_header (void *buff, struct device *dev)
     /*  */
  96 {
  97   struct enet_header *eth;
  98   eth = buff;
  99   if (arp_find(eth->daddr, *(unsigned long*)eth->daddr, dev, 
 100                    *(unsigned long *)eth->saddr))
 101     return (1);
 102   memcpy (eth->saddr, dev->dev_addr, dev->addr_len);
 103   return (0);
 104 }
 105 
 106 void
 107 eth_add_arp (unsigned long addr, struct sk_buff *skb, struct device *dev)
     /*  */
 108 {
 109    struct enet_header *eh;
 110    eh = (struct enet_header *)(skb + 1);
 111    arp_add (addr, eh->saddr, dev);
 112 }
 113 
 114 unsigned short
 115 eth_type_trans (struct sk_buff *skb, struct device *dev)
     /*  */
 116 {
 117    struct enet_header *eh;
 118    eh = (struct enet_header *)(skb + 1);
 119    return (eh->type);
 120 }
/* */
root/net/tcp/eth.c

DEFINITIONS
