/* * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL. */ #include <linux/if_arp.h> #include <linux/init.h> #include <linux/netdevice.h> #include <net_kern.h> #include "slip.h" struct slip_init { char *gate_addr; }; static void slip_init(struct net_device *dev, void *data) { struct uml_net_private *private; struct slip_data *spri; struct slip_init *init = data; private = netdev_priv(dev); spri = (struct slip_data *) private->user; memset(spri->name, 0, sizeof(spri->name)); spri->addr = NULL; spri->gate_addr = init->gate_addr; spri->slave = -1; spri->dev = dev; slip_proto_init(&spri->slip); dev->hard_header_len = 0; dev->header_ops = NULL; dev->addr_len = 0; dev->type = ARPHRD_SLIP; dev->tx_queue_len = 256; dev->flags = IFF_NOARP; printk("SLIP backend - SLIP IP = %s\n", spri->gate_addr); } static unsigned short slip_protocol(struct sk_buff *skbuff) { return htons(ETH_P_IP); } static int slip_read(int fd, struct sk_buff *skb, struct uml_net_private *lp) { return slip_user_read(fd, skb_mac_header(skb), skb->dev->mtu, (struct slip_data *) &lp->user); } static int slip_write(int fd, struct sk_buff *skb, struct uml_net_private *lp) { return slip_user_write(fd, skb->data, skb->len, (struct slip_data *) &lp->user); } static const struct net_kern_info slip_kern_info = { .init = slip_init, .protocol = slip_protocol, .read = slip_read, .write = slip_write, }; static int slip_setup(char *str, char **mac_out, void *data) { struct slip_init *init = data; *init = ((struct slip_init) { .gate_addr = NULL }); if (str[0] != '\0') init->gate_addr = str; return 1; } static struct transport slip_transport = { .list = LIST_HEAD_INIT(slip_transport.list), .name = "slip", .setup = slip_setup, .user = &slip_user_info, .kern = &slip_kern_info, .private_size = sizeof(struct slip_data), .setup_size = sizeof(struct slip_init), }; static int register_slip(void) { register_transport(&slip_transport); return 0; } late_initcall(register_slip);