Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / netrom / nr_dev.c

diff --git a/kernel/net/netrom/nr_dev.c b/kernel/net/netrom/nr_dev.c
new file mode 100644 (file)
index 0000000..988f542
--- /dev/null
+++ b/kernel/net/netrom/nr_dev.c
@@ -0,0 +1,181 @@
+/*
+ * 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 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>    /* For the statistics structure. */
+#include <linux/slab.h>
+#include <linux/uaccess.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/netrom.h>
+
+/*
+ *     Only allow IP over NET/ROM frames through if the netrom device is up.
+ */
+
+int nr_rx_ip(struct sk_buff *skb, struct net_device *dev)
+{
+       struct net_device_stats *stats = &dev->stats;
+
+       if (!netif_running(dev)) {
+               stats->rx_dropped++;
+               return 0;
+       }
+
+       stats->rx_packets++;
+       stats->rx_bytes += skb->len;
+
+       skb->protocol = htons(ETH_P_IP);
+
+       /* Spoof incoming device */
+       skb->dev      = dev;
+       skb->mac_header = skb->network_header;
+       skb_reset_network_header(skb);
+       skb->pkt_type = PACKET_HOST;
+
+       netif_rx(skb);
+
+       return 1;
+}
+
+static int nr_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, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
+
+       memcpy(buff, (saddr != NULL) ? saddr : dev->dev_addr, dev->addr_len);
+       buff[6] &= ~AX25_CBIT;
+       buff[6] &= ~AX25_EBIT;
+       buff[6] |= AX25_SSSID_SPARE;
+       buff    += AX25_ADDR_LEN;
+
+       if (daddr != NULL)
+               memcpy(buff, daddr, dev->addr_len);
+       buff[6] &= ~AX25_CBIT;
+       buff[6] |= AX25_EBIT;
+       buff[6] |= AX25_SSSID_SPARE;
+       buff    += AX25_ADDR_LEN;
+
+       *buff++ = sysctl_netrom_network_ttl_initialiser;
+
+       *buff++ = NR_PROTO_IP;
+       *buff++ = NR_PROTO_IP;
+       *buff++ = 0;
+       *buff++ = 0;
+       *buff++ = NR_PROTOEXT;
+
+       if (daddr != NULL)
+               return 37;
+
+       return -37;
+}
+
+static int __must_check nr_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 = ax25_listen_register((ax25_address *)sa->sa_data, NULL);
+               if (err)
+                       return err;
+
+               ax25_listen_release((ax25_address *)dev->dev_addr, NULL);
+       }
+
+       memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
+
+       return 0;
+}
+
+static int nr_open(struct net_device *dev)
+{
+       int err;
+
+       err = ax25_listen_register((ax25_address *)dev->dev_addr, NULL);
+       if (err)
+               return err;
+
+       netif_start_queue(dev);
+
+       return 0;
+}
+
+static int nr_close(struct net_device *dev)
+{
+       ax25_listen_release((ax25_address *)dev->dev_addr, NULL);
+       netif_stop_queue(dev);
+       return 0;
+}
+
+static netdev_tx_t nr_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+       struct net_device_stats *stats = &dev->stats;
+       unsigned int len = skb->len;
+
+       if (!nr_route_frame(skb, NULL)) {
+               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 nr_header_ops = {
+       .create = nr_header,
+};
+
+static const struct net_device_ops nr_netdev_ops = {
+       .ndo_open               = nr_open,
+       .ndo_stop               = nr_close,
+       .ndo_start_xmit         = nr_xmit,
+       .ndo_set_mac_address    = nr_set_mac_address,
+};
+
+void nr_setup(struct net_device *dev)
+{
+       dev->mtu                = NR_MAX_PACKET_SIZE;
+       dev->netdev_ops         = &nr_netdev_ops;
+       dev->header_ops         = &nr_header_ops;
+       dev->hard_header_len    = NR_NETWORK_LEN + NR_TRANSPORT_LEN;
+       dev->addr_len           = AX25_ADDR_LEN;
+       dev->type               = ARPHRD_NETROM;
+
+       /* New-style flags. */
+       dev->flags              = IFF_NOARP;
+}