fc.c
上传用户:jlfgdled
上传日期:2013-04-10
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文件大小:2k
- /*
- * 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.
- */
-
- 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=(struct fcllc *)(fch+1);
- 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.
- */
-
- 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",(unsigned int)htons(fcllc->ethertype));
- return 0;
- }
- #ifdef CONFIG_INET
- return arp_find(fch->daddr, skb);
- #else
- return 0;
- #endif
- }
-