patch-2.3.50 linux/drivers/net/ipddp.c

• Lines: 359
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.49/linux/drivers/net/ipddp.c
• Orig date: Fri Jan 7 19:13:22 2000

diff -u --recursive --new-file v2.3.49/linux/drivers/net/ipddp.c linux/drivers/net/ipddp.c
@@ -1,358 +0,0 @@
-/*
- *	ipddp.c: IP to Appletalk-IP Encapsulation driver for Linux
- *		 Appletalk-IP to IP Decapsulation driver for Linux
- *
- *	Authors:
- *      - DDP-IP Encap by: Bradford W. Johnson <johns393@maroon.tc.umn.edu>
- *	- DDP-IP Decap by: Jay Schulist <jschlst@turbolinux.com>
- *
- *	Derived from:
- *	- Almost all code already existed in net/appletalk/ddp.c I just
- *	  moved/reorginized it into a driver file. Original IP-over-DDP code
- *	  was done by Bradford W. Johnson <johns393@maroon.tc.umn.edu>
- *      - skeleton.c: A network driver outline for linux.
- *        Written 1993-94 by Donald Becker.
- *	- dummy.c: A dummy net driver. By Nick Holloway.
- *	- MacGate: A user space Daemon for Appletalk-IP Decap for
- *	  Linux by Jay Schulist <jschlst@turbolinux.com>
- *
- *      Copyright 1993 United States Government as represented by the
- *      Director, National Security Agency.
- *
- *      This software may be used and distributed according to the terms
- *      of the GNU Public License, incorporated herein by reference.
- */
-
-static const char *version = 
-	"ipddp.c:v0.01 8/28/97 Bradford W. Johnson <johns393@maroon.tc.umn.edu>\n";
-
-#include <linux/config.h>
-#ifdef MODULE
-#include <linux/module.h>
-#include <linux/version.h>
-#endif
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/types.h>
-#include <linux/fcntl.h>
-#include <linux/interrupt.h>
-#include <linux/ptrace.h>
-#include <linux/ioport.h>
-#include <linux/in.h>
-#include <linux/malloc.h>
-#include <linux/string.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <asm/bitops.h>
-#include <asm/io.h>
-#include <asm/dma.h>
-#include <linux/errno.h>
-#include <linux/netdevice.h>
-#include <linux/inetdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/if_arp.h>
-#include <linux/atalk.h>
-#include <linux/ip.h>
-#include <net/route.h>
-#include <linux/inet.h>
-
-#include "ipddp.h"		/* Our stuff */
-
-static struct ipddp_route *ipddp_route_list = NULL;
-
-#ifdef CONFIG_IPDDP_ENCAP
-static int ipddp_mode = IPDDP_ENCAP;
-#else
-static int ipddp_mode = IPDDP_DECAP;
-#endif
-
-/* Use 0 for production, 1 for verification, 2 for debug, 3 for verbose debug */
-#ifndef IPDDP_DEBUG
-#define IPDDP_DEBUG 1
-#endif
-static unsigned int ipddp_debug = IPDDP_DEBUG;
-
-/* Index to functions, as function prototypes. */
-static int ipddp_xmit(struct sk_buff *skb, struct net_device *dev);
-static struct net_device_stats *ipddp_get_stats(struct net_device *dev);
-static int ipddp_create(struct ipddp_route *new_rt);
-static int ipddp_delete(struct ipddp_route *rt);
-static struct ipddp_route* ipddp_find_route(struct ipddp_route *rt);
-static int ipddp_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
-
-
-static int ipddp_open(struct net_device *dev)
-{
-#ifdef MODULE
-        MOD_INC_USE_COUNT;
-#endif
-
-        return 0;
-}
-
-static int ipddp_close(struct net_device *dev)
-{
-#ifdef MODULE
-        MOD_DEC_USE_COUNT;
-#endif
-
-        return 0;
-}
-
-int ipddp_init(struct net_device *dev)
-{
-	static unsigned version_printed = 0;
-
-	if (ipddp_debug && version_printed++ == 0)
-                printk("%s", version);
-
-	/* Let the user now what mode we are in */
-	if(ipddp_mode == IPDDP_ENCAP)
-		printk("%s: Appletalk-IP Encap. mode by Bradford W. Johnson <johns393@maroon.tc.umn.edu>\n", 
-			dev->name);
-	if(ipddp_mode == IPDDP_DECAP)
-		printk("%s: Appletalk-IP Decap. mode by Jay Schulist <jschlst@turbolinux.com>\n", 
-			dev->name);
-
-	/* Fill in the device structure with ethernet-generic values. */
-        ether_setup(dev);
-
-	/* Initalize the device structure. */
-        dev->hard_start_xmit = ipddp_xmit;
-
-        dev->priv = kmalloc(sizeof(struct enet_statistics), GFP_KERNEL);
-        if(!dev->priv)
-                return -ENOMEM;
-        memset(dev->priv,0,sizeof(struct enet_statistics));
-
-	dev->open 	    = ipddp_open;
-        dev->stop 	    = ipddp_close;
-        dev->get_stats      = ipddp_get_stats;
-        dev->do_ioctl       = ipddp_ioctl;
-
-        dev->type = ARPHRD_IPDDP;       	/* IP over DDP tunnel */
-        dev->mtu = 585;
-        dev->flags |= IFF_NOARP;
-
-        /*
-         *      The worst case header we will need is currently a
-         *      ethernet header (14 bytes) and a ddp header (sizeof ddpehdr+1)
-         *      We send over SNAP so that takes another 8 bytes.
-         */
-        dev->hard_header_len = 14+8+sizeof(struct ddpehdr)+1;
-
-        return 0;
-}
-
-/*
- * Get the current statistics. This may be called with the card open or closed.
- */
-static struct net_device_stats *ipddp_get_stats(struct net_device *dev)
-{
-        return (struct net_device_stats *)dev->priv;
-}
-
-/*
- * Transmit LLAP/ELAP frame using aarp_send_ddp.
- */
-static int ipddp_xmit(struct sk_buff *skb, struct net_device *dev)
-{
-	u32 paddr = ((struct rtable*)skb->dst)->rt_gateway;
-        struct ddpehdr *ddp;
-        struct ipddp_route *rt;
-        struct at_addr *our_addr;
-
-	/*
-         * Find appropriate route to use, based only on IP number.
-         */
-        for(rt = ipddp_route_list; rt != NULL; rt = rt->next)
-        {
-                if(rt->ip == paddr)
-                        break;
-        }
-        if(rt == NULL)
-                return 0;
-
-        our_addr = atalk_find_dev_addr(rt->dev);
-
-	if(ipddp_mode == IPDDP_DECAP)
-		/* 
-		 * Pull off the excess room that should not be there.
-		 * This is due to a hard-header problem. This is the
-		 * quick fix for now though, till it breaks.
-		 */
-		skb_pull(skb, 35-(sizeof(struct ddpehdr)+1));
-
-	/* Create the Extended DDP header */
-	ddp = (struct ddpehdr *)skb->data;
-        ddp->deh_len = skb->len;
-        ddp->deh_hops = 1;
-        ddp->deh_pad = 0;
-        ddp->deh_sum = 0;
-
-	/*
-         * For Localtalk we need aarp_send_ddp to strip the
-         * long DDP header and place a shot DDP header on it.
-         */
-        if(rt->dev->type == ARPHRD_LOCALTLK)
-        {
-                ddp->deh_dnet  = 0;   /* FIXME more hops?? */
-                ddp->deh_snet  = 0;
-        }
-        else
-        {
-                ddp->deh_dnet  = rt->at.s_net;   /* FIXME more hops?? */
-                ddp->deh_snet  = our_addr->s_net;
-        }
-        ddp->deh_dnode = rt->at.s_node;
-        ddp->deh_snode = our_addr->s_node;
-        ddp->deh_dport = 72;
-        ddp->deh_sport = 72;
-
-        *((__u8 *)(ddp+1)) = 22;        	/* ddp type = IP */
-        *((__u16 *)ddp)=ntohs(*((__u16 *)ddp));	/* fix up length field */
-
-        skb->protocol = htons(ETH_P_ATALK);     /* Protocol has changed */
-
-	((struct net_device_stats *) dev->priv)->tx_packets++;
-        ((struct net_device_stats *) dev->priv)->tx_bytes+=skb->len;
-
-        if(aarp_send_ddp(rt->dev, skb, &rt->at, NULL) < 0)
-                dev_kfree_skb(skb);
-
-        return 0;
-}
-
-/*
- * Create a routing entry. We first verify that the
- * record does not already exist. If it does we return -EEXIST
- */
-static int ipddp_create(struct ipddp_route *new_rt)
-{
-        struct ipddp_route *rt =(struct ipddp_route*) kmalloc(sizeof(*rt), GFP_KERNEL);
-	struct ipddp_route *test;
-
-        if(rt == NULL)
-                return -ENOMEM;
-
-        rt->ip = new_rt->ip;
-        rt->at = new_rt->at;
-        rt->next = NULL;
-        rt->dev = atrtr_get_dev(&rt->at);
-        if(rt->dev == NULL)
-                return (-ENETUNREACH);
-
-	test = ipddp_find_route(rt);
-	if(test != NULL)
-		return (-EEXIST);
-	
-        rt->next = ipddp_route_list;
-        ipddp_route_list = rt;
-
-        return 0;
-}
-
-/*
- * Delete a route, we only delete a FULL match.
- * If route does not exist we return -ENOENT.
- */
-static int ipddp_delete(struct ipddp_route *rt)
-{
-        struct ipddp_route **r = &ipddp_route_list;
-        struct ipddp_route *tmp;
-
-        while((tmp = *r) != NULL)
-        {
-                if(tmp->ip == rt->ip
-                        && tmp->at.s_net == rt->at.s_net
-                        && tmp->at.s_node == rt->at.s_node)
-                {
-                        *r = tmp->next;
-                        kfree_s(tmp, sizeof(struct ipddp_route));
-                        return 0;
-                }
-                r = &tmp->next;
-        }
-
-        return (-ENOENT);
-}
-
-/*
- * Find a routing entry, we only return a FULL match
- */
-static struct ipddp_route* ipddp_find_route(struct ipddp_route *rt)
-{
-        struct ipddp_route *f;
-
-        for(f = ipddp_route_list; f != NULL; f = f->next)
-        {
-                if(f->ip == rt->ip
-                        && f->at.s_net == rt->at.s_net
-                        && f->at.s_node == rt->at.s_node)
-                        return (f);
-        }
-
-        return (NULL);
-}
-
-static int ipddp_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
-{
-        struct ipddp_route *rt = (struct ipddp_route *)ifr->ifr_data;
-
-        if(!capable(CAP_NET_ADMIN))
-                return -EPERM;
-
-        switch(cmd)
-        {
-		case SIOCADDIPDDPRT:
-                        return (ipddp_create(rt));
-
-                case SIOCFINDIPDDPRT:
-                        if(copy_to_user(rt, ipddp_find_route(rt), sizeof(struct ipddp_route)))
-                                return -EFAULT;
-                        return 0;
-
-                case SIOCDELIPDDPRT:
-                        return (ipddp_delete(rt));
-
-                default:
-                        return -EINVAL;
-        }
-}
-
-#ifdef MODULE	/* Module specific functions for ipddp.c */
-
-static struct net_device dev_ipddp=
-{
-        "ipddp0\0   ",
-                0, 0, 0, 0,
-                0x0, 0,
-                0, 0, 0, NULL, ipddp_init
-};
-
-MODULE_PARM(ipddp_mode, "i");
-
-int init_module(void)
-{
-	int err;
-
-	err=dev_alloc_name(&dev_ipddp, "ipddp%d");
-        if(err < 0)
-                return err;
-
-	if(register_netdev(&dev_ipddp) != 0)
-                return -EIO;
-
-	return 0;
-}
-
-void cleanup_module(void)
-{
-	unregister_netdev(&dev_ipddp);
-        kfree(dev_ipddp.priv);
-	dev_ipddp.priv = NULL;
-}
-
-#endif /* MODULE */