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![Thomas Gleixner](/assets/img/avatar_default.png)
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>
178 lines
3.7 KiB
C
178 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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*
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* Copyright 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> /* For the statistics structure. */
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#include <linux/slab.h>
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#include <linux/uaccess.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/netrom.h>
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/*
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* Only allow IP over NET/ROM frames through if the netrom device is up.
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*/
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int nr_rx_ip(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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if (!netif_running(dev)) {
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stats->rx_dropped++;
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return 0;
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}
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stats->rx_packets++;
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stats->rx_bytes += skb->len;
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skb->protocol = htons(ETH_P_IP);
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/* Spoof incoming device */
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skb->dev = dev;
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skb->mac_header = skb->network_header;
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skb_reset_network_header(skb);
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skb->pkt_type = PACKET_HOST;
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netif_rx(skb);
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return 1;
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}
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static int nr_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, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
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memcpy(buff, (saddr != NULL) ? saddr : dev->dev_addr, dev->addr_len);
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buff[6] &= ~AX25_CBIT;
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buff[6] &= ~AX25_EBIT;
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buff[6] |= AX25_SSSID_SPARE;
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buff += AX25_ADDR_LEN;
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if (daddr != NULL)
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memcpy(buff, daddr, dev->addr_len);
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buff[6] &= ~AX25_CBIT;
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buff[6] |= AX25_EBIT;
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buff[6] |= AX25_SSSID_SPARE;
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buff += AX25_ADDR_LEN;
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*buff++ = sysctl_netrom_network_ttl_initialiser;
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*buff++ = NR_PROTO_IP;
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*buff++ = NR_PROTO_IP;
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*buff++ = 0;
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*buff++ = 0;
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*buff++ = NR_PROTOEXT;
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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 __must_check nr_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 = ax25_listen_register((ax25_address *)sa->sa_data, NULL);
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if (err)
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return err;
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ax25_listen_release((ax25_address *)dev->dev_addr, NULL);
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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 nr_open(struct net_device *dev)
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{
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int err;
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err = ax25_listen_register((ax25_address *)dev->dev_addr, NULL);
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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 nr_close(struct net_device *dev)
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{
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ax25_listen_release((ax25_address *)dev->dev_addr, NULL);
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netif_stop_queue(dev);
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return 0;
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}
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static netdev_tx_t nr_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 (!nr_route_frame(skb, NULL)) {
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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 nr_header_ops = {
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.create = nr_header,
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};
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static const struct net_device_ops nr_netdev_ops = {
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.ndo_open = nr_open,
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.ndo_stop = nr_close,
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.ndo_start_xmit = nr_xmit,
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.ndo_set_mac_address = nr_set_mac_address,
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};
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void nr_setup(struct net_device *dev)
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{
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dev->mtu = NR_MAX_PACKET_SIZE;
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dev->netdev_ops = &nr_netdev_ops;
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dev->header_ops = &nr_header_ops;
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dev->hard_header_len = NR_NETWORK_LEN + NR_TRANSPORT_LEN;
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dev->addr_len = AX25_ADDR_LEN;
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dev->type = ARPHRD_NETROM;
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/* New-style flags. */
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dev->flags = IFF_NOARP;
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}
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