/* * NET3:	Fibre Channel device handling subroutines *  *		This program is free software; you can redistribute it and/or *		modify it under the terms of the GNU General Public License *		as published by the Free Software Foundation; either version *		2 of the License, or (at your option) any later version. * *		Vineet Abraham <vma@iol.unh.edu> *		v 1.0 03/22/99 */ #include <linux/config.h>#include <asm/uaccess.h>#include <asm/system.h>#include <linux/types.h>#include <linux/kernel.h>#include <linux/sched.h>#include <linux/string.h>#include <linux/mm.h>#include <linux/socket.h>#include <linux/in.h>#include <linux/inet.h>#include <linux/netdevice.h>#include <linux/fcdevice.h>#include <linux/skbuff.h>#include <linux/errno.h>#include <linux/timer.h>#include <linux/net.h>#include <linux/proc_fs.h>#include <linux/init.h>#include <net/arp.h> /* *	Put the headers on a Fibre Channel packet.  */ static int fc_header(struct sk_buff *skb, struct net_device *dev,		     unsigned short type,		     void *daddr, void *saddr, unsigned len) {	struct fch_hdr *fch;	int hdr_len; 	/* 	 * Add the 802.2 SNAP header if IP as the IPv4 code calls  	 * dev->hard_header directly.	 */	if (type == ETH_P_IP || type == ETH_P_ARP)	{		struct fcllc *fcllc; 		hdr_len = sizeof(struct fch_hdr) + sizeof(struct fcllc);		fch = (struct fch_hdr *)skb_push(skb, hdr_len);		fcllc = (struct fcllc *)(fch+1);		fcllc->dsap = fcllc->ssap = EXTENDED_SAP;		fcllc->llc = UI_CMD;		fcllc->protid[0] = fcllc->protid[1] = fcllc->protid[2] = 0x00;		fcllc->ethertype = htons(type);	}	else	{		hdr_len = sizeof(struct fch_hdr);		fch = (struct fch_hdr *)skb_push(skb, hdr_len);		} 	if(saddr)		memcpy(fch->saddr,saddr,dev->addr_len);	else		memcpy(fch->saddr,dev->dev_addr,dev->addr_len); 	if(daddr) 	{		memcpy(fch->daddr,daddr,dev->addr_len);		return(hdr_len);	}	return -hdr_len;}	/* *	A neighbour discovery of some species (eg arp) has completed. We *	can now send the packet. */ static int fc_rebuild_header(struct sk_buff *skb) {	struct fch_hdr *fch=(struct fch_hdr *)skb->data;	struct fcllc *fcllc=(struct fcllc *)(skb->data+sizeof(struct fch_hdr));	if(fcllc->ethertype != htons(ETH_P_IP)) {		printk("fc_rebuild_header: Don't know how to resolve type %04X addresses ?\n", ntohs(fcllc->ethertype));		return 0;	}#ifdef CONFIG_INET	return arp_find(fch->daddr, skb);#else	return 0;#endif} static void fc_setup(struct net_device *dev){	dev->hard_header	= fc_header;	dev->rebuild_header	= fc_rebuild_header;                	dev->type		= ARPHRD_IEEE802;	dev->hard_header_len	= FC_HLEN;	dev->mtu		= 2024;	dev->addr_len		= FC_ALEN;	dev->tx_queue_len	= 100; /* Long queues on fc */	dev->flags		= IFF_BROADCAST; 	memset(dev->broadcast, 0xFF, FC_ALEN);} /** * alloc_fcdev - Register fibre channel device * @sizeof_priv: Size of additional driver-private structure to be allocated *	for this fibre channel device * * Fill in the fields of the device structure with fibre channel-generic values. * * Constructs a new net device, complete with a private data area of * size @sizeof_priv.  A 32-byte (not bit) alignment is enforced for * this private data area. */struct net_device *alloc_fcdev(int sizeof_priv){	return alloc_netdev(sizeof_priv, "fc%d", fc_setup);}EXPORT_SYMBOL(alloc_fcdev);