![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
221 lines
4.5 KiB
C
221 lines
4.5 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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/config.h>
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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/sched.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 <asm/system.h>
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#include <asm/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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#ifdef CONFIG_INET
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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 = netdev_priv(dev);
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if (!netif_running(dev)) {
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stats->rx_errors++;
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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->h.raw = skb->data;
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skb->nh.raw = skb->data;
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skb->pkt_type = PACKET_HOST;
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ip_rcv(skb, skb->dev, NULL);
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return 1;
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}
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static int nr_rebuild_header(struct sk_buff *skb)
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{
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struct net_device *dev = skb->dev;
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struct net_device_stats *stats = netdev_priv(dev);
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struct sk_buff *skbn;
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unsigned char *bp = skb->data;
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int len;
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if (arp_find(bp + 7, skb)) {
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return 1;
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}
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bp[6] &= ~AX25_CBIT;
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bp[6] &= ~AX25_EBIT;
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bp[6] |= AX25_SSSID_SPARE;
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bp += AX25_ADDR_LEN;
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bp[6] &= ~AX25_CBIT;
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bp[6] |= AX25_EBIT;
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bp[6] |= AX25_SSSID_SPARE;
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if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
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kfree_skb(skb);
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return 1;
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}
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if (skb->sk != NULL)
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skb_set_owner_w(skbn, skb->sk);
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kfree_skb(skb);
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len = skbn->len;
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if (!nr_route_frame(skbn, NULL)) {
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kfree_skb(skbn);
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stats->tx_errors++;
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}
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stats->tx_packets++;
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stats->tx_bytes += len;
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return 1;
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}
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#else
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static int nr_rebuild_header(struct sk_buff *skb)
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{
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return 1;
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}
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#endif
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static int nr_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
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void *daddr, void *saddr, unsigned 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 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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if (dev->flags & IFF_UP)
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ax25_listen_release((ax25_address *)dev->dev_addr, NULL);
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memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
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if (dev->flags & IFF_UP)
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ax25_listen_register((ax25_address *)dev->dev_addr, NULL);
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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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netif_start_queue(dev);
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ax25_listen_register((ax25_address *)dev->dev_addr, NULL);
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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 int nr_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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struct net_device_stats *stats = netdev_priv(dev);
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dev_kfree_skb(skb);
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stats->tx_errors++;
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return 0;
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}
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static struct net_device_stats *nr_get_stats(struct net_device *dev)
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{
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return netdev_priv(dev);
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}
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void nr_setup(struct net_device *dev)
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{
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SET_MODULE_OWNER(dev);
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dev->mtu = NR_MAX_PACKET_SIZE;
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dev->hard_start_xmit = nr_xmit;
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dev->open = nr_open;
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dev->stop = nr_close;
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dev->hard_header = nr_header;
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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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dev->tx_queue_len = 40;
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dev->rebuild_header = nr_rebuild_header;
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dev->set_mac_address = nr_set_mac_address;
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/* New-style flags. */
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dev->flags = 0;
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dev->get_stats = nr_get_stats;
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}
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