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Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
179 lines
4.7 KiB
C
179 lines
4.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* FDDI-type device handling.
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*
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* Version: @(#)fddi.c 1.0.0 08/12/96
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*
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* Authors: Lawrence V. Stefani, <stefani@lkg.dec.com>
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*
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* fddi.c is based on previous eth.c and tr.c work by
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* Ross Biro
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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* Mark Evans, <evansmp@uhura.aston.ac.uk>
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* Florian La Roche, <rzsfl@rz.uni-sb.de>
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* Alan Cox, <gw4pts@gw4pts.ampr.org>
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*
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* Changes
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* Alan Cox : New arp/rebuild header
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* Maciej W. Rozycki : IPv6 support
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/socket.h>
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#include <linux/in.h>
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#include <linux/inet.h>
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#include <linux/netdevice.h>
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#include <linux/fddidevice.h>
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#include <linux/if_ether.h>
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#include <linux/skbuff.h>
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#include <linux/errno.h>
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#include <net/arp.h>
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#include <net/sock.h>
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/*
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* Create the FDDI MAC header for an arbitrary protocol layer
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*
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* saddr=NULL means use device source address
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* daddr=NULL means leave destination address (eg unresolved arp)
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*/
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static int fddi_header(struct sk_buff *skb, struct net_device *dev,
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unsigned short type,
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const void *daddr, const void *saddr, unsigned int len)
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{
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int hl = FDDI_K_SNAP_HLEN;
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struct fddihdr *fddi;
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if(type != ETH_P_IP && type != ETH_P_IPV6 && type != ETH_P_ARP)
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hl=FDDI_K_8022_HLEN-3;
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fddi = skb_push(skb, hl);
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fddi->fc = FDDI_FC_K_ASYNC_LLC_DEF;
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if(type == ETH_P_IP || type == ETH_P_IPV6 || type == ETH_P_ARP)
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{
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fddi->hdr.llc_snap.dsap = FDDI_EXTENDED_SAP;
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fddi->hdr.llc_snap.ssap = FDDI_EXTENDED_SAP;
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fddi->hdr.llc_snap.ctrl = FDDI_UI_CMD;
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fddi->hdr.llc_snap.oui[0] = 0x00;
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fddi->hdr.llc_snap.oui[1] = 0x00;
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fddi->hdr.llc_snap.oui[2] = 0x00;
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fddi->hdr.llc_snap.ethertype = htons(type);
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}
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/* Set the source and destination hardware addresses */
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if (saddr != NULL)
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memcpy(fddi->saddr, saddr, dev->addr_len);
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else
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memcpy(fddi->saddr, dev->dev_addr, dev->addr_len);
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if (daddr != NULL)
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{
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memcpy(fddi->daddr, daddr, dev->addr_len);
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return hl;
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}
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return -hl;
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}
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/*
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* Determine the packet's protocol ID and fill in skb fields.
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* This routine is called before an incoming packet is passed
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* up. It's used to fill in specific skb fields and to set
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* the proper pointer to the start of packet data (skb->data).
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*/
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__be16 fddi_type_trans(struct sk_buff *skb, struct net_device *dev)
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{
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struct fddihdr *fddi = (struct fddihdr *)skb->data;
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__be16 type;
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/*
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* Set mac.raw field to point to FC byte, set data field to point
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* to start of packet data. Assume 802.2 SNAP frames for now.
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*/
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skb->dev = dev;
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skb_reset_mac_header(skb); /* point to frame control (FC) */
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if(fddi->hdr.llc_8022_1.dsap==0xe0)
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{
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skb_pull(skb, FDDI_K_8022_HLEN-3);
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type = htons(ETH_P_802_2);
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}
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else
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{
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skb_pull(skb, FDDI_K_SNAP_HLEN); /* adjust for 21 byte header */
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type=fddi->hdr.llc_snap.ethertype;
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}
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/* Set packet type based on destination address and flag settings */
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if (*fddi->daddr & 0x01)
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{
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if (memcmp(fddi->daddr, dev->broadcast, FDDI_K_ALEN) == 0)
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skb->pkt_type = PACKET_BROADCAST;
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else
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skb->pkt_type = PACKET_MULTICAST;
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}
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else if (dev->flags & IFF_PROMISC)
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{
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if (memcmp(fddi->daddr, dev->dev_addr, FDDI_K_ALEN))
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skb->pkt_type = PACKET_OTHERHOST;
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}
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/* Assume 802.2 SNAP frames, for now */
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return type;
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}
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EXPORT_SYMBOL(fddi_type_trans);
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static const struct header_ops fddi_header_ops = {
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.create = fddi_header,
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};
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static void fddi_setup(struct net_device *dev)
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{
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dev->header_ops = &fddi_header_ops;
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dev->type = ARPHRD_FDDI;
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dev->hard_header_len = FDDI_K_SNAP_HLEN+3; /* Assume 802.2 SNAP hdr len + 3 pad bytes */
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dev->mtu = FDDI_K_SNAP_DLEN; /* Assume max payload of 802.2 SNAP frame */
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dev->min_mtu = FDDI_K_SNAP_HLEN;
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dev->max_mtu = FDDI_K_SNAP_DLEN;
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dev->addr_len = FDDI_K_ALEN;
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dev->tx_queue_len = 100; /* Long queues on FDDI */
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dev->flags = IFF_BROADCAST | IFF_MULTICAST;
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memset(dev->broadcast, 0xFF, FDDI_K_ALEN);
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}
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/**
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* alloc_fddidev - Register FDDI device
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* @sizeof_priv: Size of additional driver-private structure to be allocated
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* for this FDDI device
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*
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* Fill in the fields of the device structure with FDDI-generic values.
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*
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* Constructs a new net device, complete with a private data area of
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* size @sizeof_priv. A 32-byte (not bit) alignment is enforced for
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* this private data area.
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*/
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struct net_device *alloc_fddidev(int sizeof_priv)
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{
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return alloc_netdev(sizeof_priv, "fddi%d", NET_NAME_UNKNOWN,
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fddi_setup);
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}
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EXPORT_SYMBOL(alloc_fddidev);
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MODULE_LICENSE("GPL");
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