Import of Linux/MIPS 1.3.0

1 files changed, 254 insertions, 0 deletions

diff --git a/net/netrom/nr_dev.c b/net/netrom/nr_dev.c
new file mode 100644
index 000000000..f9fd83f73
--- /dev/null
+++ b/net/netrom/nr_dev.c
@@ -0,0 +1,254 @@
+/*
+ *	NET/ROM release 002
+ *
+ *	This is ALPHA test software. This code may break your machine, randomly fail to work with new 
+ *	releases, misbehave and/or generally screw up. It might even work. 
+ *
+ *	This code REQUIRES 1.3.0 or higher/ NET3.029
+ *
+ *	This module:
+ *		This module 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.
+ *
+ *	History
+ *	NET/ROM 001	Jonathan(G4KLX)	Cloned from loopback.c
+ */
+
+#include <linux/config.h>
+#ifdef CONFIG_NETROM
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/fs.h>
+#include <linux/types.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 <asm/system.h>
+#include <asm/segment.h>
+#include <asm/io.h>
+
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.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 device *dev)
+{
+	struct enet_statistics *stats = (struct enet_statistics *)dev->priv;
+
+	if (!dev->start) {
+		stats->rx_errors++;
+		return 0;
+	}
+
+	stats->rx_packets++;
+	skb->protocol=htons(ETH_P_IP);
+	/* Spoof incoming device */
+	skb->dev=dev;
+
+	ip_rcv(skb, dev, NULL);
+
+	return 1;
+}
+
+/*
+ * We can't handle ARP so put some identification characters into the ARP
+ * packet so that the transmit routine can identify it, and throw it away.
+ */
+
+static int nr_header(unsigned char *buff, struct device *dev, unsigned short type,
+	void *daddr, void *saddr, unsigned len, struct sk_buff *skb)
+{
+	if (type == ETH_P_ARP) {
+		*buff++ = 0xFF;		/* Mark it */
+		*buff++ = 0xFE;
+		return 37;
+	}
+
+	buff += 16;
+	
+	*buff++ = AX25_P_NETROM;
+	
+	memcpy(buff, (saddr != NULL) ? saddr : dev->dev_addr, dev->addr_len);
+	buff[6] &= ~LAPB_C;
+	buff[6] &= ~LAPB_E;
+	buff[6] |= SSID_SPARE;
+	buff += dev->addr_len;
+
+	if (daddr != NULL)
+		memcpy(buff, daddr, dev->addr_len);
+	buff[6] &= ~LAPB_C;
+	buff[6] |= LAPB_E;
+	buff[6] |= SSID_SPARE;
+	buff += dev->addr_len;
+
+	*buff++ = nr_default.ttl;
+
+	*buff++ = NR_PROTO_IP;
+	*buff++ = NR_PROTO_IP;
+	*buff++ = 0;
+	*buff++ = 0;
+	*buff++ = NR_PROTOEXT;
+
+	if (daddr != NULL)
+		return 37;
+	
+	return -37;	
+}
+
+static int nr_rebuild_header(void *buff, struct device *dev,
+	unsigned long raddr, struct sk_buff *skb)
+{
+	unsigned char *bp = (unsigned char *)buff;
+
+	if (arp_find(bp + 24, raddr, dev, dev->pa_addr, skb))
+		return 1;
+
+	bp[23] &= ~LAPB_C;
+	bp[23] &= ~LAPB_E;
+	bp[23] |= SSID_SPARE;
+	
+	bp[30] &= ~LAPB_C;
+	bp[30] |= LAPB_E;
+	bp[30] |= SSID_SPARE;
+
+	return 0;
+}
+
+static int nr_set_mac_address(struct device *dev, void *addr)
+{
+	memcpy(dev->dev_addr, addr, dev->addr_len);
+
+	return 0;
+}
+
+static int nr_open(struct device *dev)
+{
+	dev->tbusy = 0;
+	dev->start = 1;
+
+	return 0;
+}
+
+static int nr_close(struct device *dev)
+{
+	dev->tbusy = 1;
+	dev->start = 0;
+
+	return 0;
+}
+
+static int nr_xmit(struct sk_buff *skb, struct device *dev)
+{
+	struct enet_statistics *stats = (struct enet_statistics *)dev->priv;
+	struct sk_buff *skbn;
+
+	if (skb == NULL || dev == NULL)
+		return 0;
+
+	if (!dev->start) {
+		printk("netrom: xmit call when iface is down\n");
+		return 1;
+	}
+
+	cli();
+
+	if (dev->tbusy != 0) {
+		sti();
+		stats->tx_errors++;
+		return 1;
+	}
+
+	dev->tbusy = 1;
+
+	sti();
+
+	if (skb->data[0] != 0xFF && skb->data[1] != 0xFE) {
+		if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
+			dev->tbusy = 0;
+			stats->tx_errors++;
+			return 1;
+		}
+
+		if (!nr_route_frame(skbn, NULL)) {
+			skbn->free = 1;
+			kfree_skb(skbn, FREE_WRITE);
+			dev->tbusy = 0;
+			stats->tx_errors++;
+			return 1;
+		}
+	}
+
+	dev_kfree_skb(skb, FREE_WRITE);
+
+	stats->tx_packets++;
+
+	dev->tbusy = 0;
+
+	mark_bh(NET_BH);
+
+	return 0;
+}
+
+static struct enet_statistics *nr_get_stats(struct device *dev)
+{
+	return (struct enet_statistics *)dev->priv;
+}
+
+int nr_init(struct device *dev)
+{
+	int i;
+
+	dev->mtu		= 236;		/* MTU			*/
+	dev->tbusy		= 0;
+	dev->hard_start_xmit	= nr_xmit;
+	dev->open		= nr_open;
+	dev->stop		= nr_close;
+
+	dev->hard_header	= nr_header;
+	dev->hard_header_len	= 37;
+	dev->addr_len		= 7;
+	dev->type		= ARPHRD_NETROM;
+	dev->rebuild_header	= nr_rebuild_header;
+	dev->set_mac_address    = nr_set_mac_address;
+
+	/* New-style flags. */
+	dev->flags		= 0;
+	dev->family		= AF_INET;
+
+	dev->pa_addr		= 0;
+	dev->pa_brdaddr		= 0;
+	dev->pa_mask		= 0;
+	dev->pa_alen		= sizeof(unsigned long);
+
+	dev->priv = kmalloc(sizeof(struct enet_statistics), GFP_KERNEL);
+
+	memset(dev->priv, 0, sizeof(struct enet_statistics));
+
+	dev->get_stats = nr_get_stats;
+
+	/* Fill in the generic fields of the device structure. */
+	for (i = 0; i < DEV_NUMBUFFS; i++)
+		skb_queue_head_init(&dev->buffs[i]);
+
+	return 0;
+};
+
+#endif