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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /net/rose/rose_dev.c
Initial import
Diffstat (limited to 'net/rose/rose_dev.c')
-rw-r--r--net/rose/rose_dev.c144
1 files changed, 144 insertions, 0 deletions
diff --git a/net/rose/rose_dev.c b/net/rose/rose_dev.c
new file mode 100644
index 000000000..369ca81a8
--- /dev/null
+++ b/net/rose/rose_dev.c
@@ -0,0 +1,144 @@
+/*
+ * 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.
+ *
+ * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
+ */
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/fs.h>
+#include <linux/types.h>
+#include <linux/sysctl.h>
+#include <linux/string.h>
+#include <linux/socket.h>
+#include <linux/errno.h>
+#include <linux/fcntl.h>
+#include <linux/in.h>
+#include <linux/if_ether.h>
+#include <linux/slab.h>
+
+#include <asm/io.h>
+
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/if_arp.h>
+#include <linux/skbuff.h>
+
+#include <net/ip.h>
+#include <net/arp.h>
+
+#include <net/ax25.h>
+#include <net/rose.h>
+
+static int rose_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type,
+ const void *daddr, const void *saddr, unsigned int len)
+{
+ unsigned char *buff = skb_push(skb, ROSE_MIN_LEN + 2);
+
+ if (daddr)
+ memcpy(buff + 7, daddr, dev->addr_len);
+
+ *buff++ = ROSE_GFI | ROSE_Q_BIT;
+ *buff++ = 0x00;
+ *buff++ = ROSE_DATA;
+ *buff++ = 0x7F;
+ *buff++ = AX25_P_IP;
+
+ if (daddr != NULL)
+ return 37;
+
+ return -37;
+}
+
+static int rose_set_mac_address(struct net_device *dev, void *addr)
+{
+ struct sockaddr *sa = addr;
+ int err;
+
+ if (!memcmp(dev->dev_addr, sa->sa_data, dev->addr_len))
+ return 0;
+
+ if (dev->flags & IFF_UP) {
+ err = rose_add_loopback_node((rose_address *)sa->sa_data);
+ if (err)
+ return err;
+
+ rose_del_loopback_node((rose_address *)dev->dev_addr);
+ }
+
+ memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
+
+ return 0;
+}
+
+static int rose_open(struct net_device *dev)
+{
+ int err;
+
+ err = rose_add_loopback_node((rose_address *)dev->dev_addr);
+ if (err)
+ return err;
+
+ netif_start_queue(dev);
+
+ return 0;
+}
+
+static int rose_close(struct net_device *dev)
+{
+ netif_stop_queue(dev);
+ rose_del_loopback_node((rose_address *)dev->dev_addr);
+ return 0;
+}
+
+static netdev_tx_t rose_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct net_device_stats *stats = &dev->stats;
+ unsigned int len = skb->len;
+
+ if (!netif_running(dev)) {
+ printk(KERN_ERR "ROSE: rose_xmit - called when iface is down\n");
+ return NETDEV_TX_BUSY;
+ }
+
+ if (!rose_route_frame(skb, NULL)) {
+ dev_kfree_skb(skb);
+ stats->tx_errors++;
+ return NETDEV_TX_OK;
+ }
+
+ stats->tx_packets++;
+ stats->tx_bytes += len;
+ return NETDEV_TX_OK;
+}
+
+static const struct header_ops rose_header_ops = {
+ .create = rose_header,
+};
+
+static const struct net_device_ops rose_netdev_ops = {
+ .ndo_open = rose_open,
+ .ndo_stop = rose_close,
+ .ndo_start_xmit = rose_xmit,
+ .ndo_set_mac_address = rose_set_mac_address,
+};
+
+void rose_setup(struct net_device *dev)
+{
+ dev->mtu = ROSE_MAX_PACKET_SIZE - 2;
+ dev->netdev_ops = &rose_netdev_ops;
+
+ dev->header_ops = &rose_header_ops;
+ dev->hard_header_len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
+ dev->addr_len = ROSE_ADDR_LEN;
+ dev->type = ARPHRD_ROSE;
+
+ /* New-style flags. */
+ dev->flags = IFF_NOARP;
+}