zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/net/netrom/nr_dev.c b/ap/os/linux/linux-3.4.x/net/netrom/nr_dev.c
new file mode 100644
index 0000000..1c51d7a
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/net/netrom/nr_dev.c
@@ -0,0 +1,212 @@
+/*
+ * 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 <asm/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;
+}
+
+#ifdef CONFIG_INET
+
+static int nr_rebuild_header(struct sk_buff *skb)
+{
+ unsigned char *bp = skb->data;
+
+ if (arp_find(bp + 7, skb))
+ return 1;
+
+ bp[6] &= ~AX25_CBIT;
+ bp[6] &= ~AX25_EBIT;
+ bp[6] |= AX25_SSSID_SPARE;
+ bp += AX25_ADDR_LEN;
+
+ bp[6] &= ~AX25_CBIT;
+ bp[6] |= AX25_EBIT;
+ bp[6] |= AX25_SSSID_SPARE;
+
+ return 0;
+}
+
+#else
+
+static int nr_rebuild_header(struct sk_buff *skb)
+{
+ return 1;
+}
+
+#endif
+
+static int nr_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type,
+ const void *daddr, const void *saddr, unsigned 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,
+ .rebuild= nr_rebuild_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;
+}