2874c5fd28
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>
142 lines
2.9 KiB
C
142 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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*
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* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
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*/
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#include <linux/module.h>
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#include <linux/proc_fs.h>
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/fs.h>
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#include <linux/types.h>
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#include <linux/sysctl.h>
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#include <linux/string.h>
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#include <linux/socket.h>
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#include <linux/errno.h>
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#include <linux/fcntl.h>
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#include <linux/in.h>
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#include <linux/if_ether.h>
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#include <linux/slab.h>
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#include <asm/io.h>
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#include <linux/inet.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/if_arp.h>
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#include <linux/skbuff.h>
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#include <net/ip.h>
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#include <net/arp.h>
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#include <net/ax25.h>
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#include <net/rose.h>
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static int rose_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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unsigned char *buff = skb_push(skb, ROSE_MIN_LEN + 2);
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if (daddr)
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memcpy(buff + 7, daddr, dev->addr_len);
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*buff++ = ROSE_GFI | ROSE_Q_BIT;
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*buff++ = 0x00;
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*buff++ = ROSE_DATA;
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*buff++ = 0x7F;
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*buff++ = AX25_P_IP;
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if (daddr != NULL)
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return 37;
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return -37;
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}
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static int rose_set_mac_address(struct net_device *dev, void *addr)
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{
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struct sockaddr *sa = addr;
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int err;
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if (!memcmp(dev->dev_addr, sa->sa_data, dev->addr_len))
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return 0;
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if (dev->flags & IFF_UP) {
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err = rose_add_loopback_node((rose_address *)sa->sa_data);
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if (err)
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return err;
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rose_del_loopback_node((rose_address *)dev->dev_addr);
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}
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memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
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return 0;
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}
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static int rose_open(struct net_device *dev)
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{
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int err;
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err = rose_add_loopback_node((rose_address *)dev->dev_addr);
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if (err)
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return err;
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netif_start_queue(dev);
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return 0;
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}
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static int rose_close(struct net_device *dev)
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{
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netif_stop_queue(dev);
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rose_del_loopback_node((rose_address *)dev->dev_addr);
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return 0;
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}
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static netdev_tx_t rose_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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struct net_device_stats *stats = &dev->stats;
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unsigned int len = skb->len;
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if (!netif_running(dev)) {
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printk(KERN_ERR "ROSE: rose_xmit - called when iface is down\n");
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return NETDEV_TX_BUSY;
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}
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if (!rose_route_frame(skb, NULL)) {
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dev_kfree_skb(skb);
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stats->tx_errors++;
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return NETDEV_TX_OK;
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}
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stats->tx_packets++;
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stats->tx_bytes += len;
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return NETDEV_TX_OK;
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}
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static const struct header_ops rose_header_ops = {
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.create = rose_header,
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};
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static const struct net_device_ops rose_netdev_ops = {
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.ndo_open = rose_open,
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.ndo_stop = rose_close,
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.ndo_start_xmit = rose_xmit,
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.ndo_set_mac_address = rose_set_mac_address,
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};
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void rose_setup(struct net_device *dev)
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{
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dev->mtu = ROSE_MAX_PACKET_SIZE - 2;
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dev->netdev_ops = &rose_netdev_ops;
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dev->header_ops = &rose_header_ops;
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dev->hard_header_len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
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dev->addr_len = ROSE_ADDR_LEN;
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dev->type = ARPHRD_ROSE;
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/* New-style flags. */
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dev->flags = IFF_NOARP;
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}
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