/* * 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 <linux/string.h> #include <net_kern.h> #include <net_user.h> #include "slirp.h" struct slirp_init { struct arg_list_dummy_wrapper argw; /* XXX should be simpler... */ }; void slirp_init(struct net_device *dev, void *data) { struct uml_net_private *private; struct slirp_data *spri; struct slirp_init *init = data; int i; private = netdev_priv(dev); spri = (struct slirp_data *) private->user; spri->argw = init->argw; spri->pid = -1; 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("SLIRP backend - command line:"); for (i = 0; spri->argw.argv[i] != NULL; i++) printk(" '%s'",spri->argw.argv[i]); printk("\n"); } static unsigned short slirp_protocol(struct sk_buff *skbuff) { return htons(ETH_P_IP); } static int slirp_read(int fd, struct sk_buff *skb, struct uml_net_private *lp) { return slirp_user_read(fd, skb_mac_header(skb), skb->dev->mtu, (struct slirp_data *) &lp->user); } static int slirp_write(int fd, struct sk_buff *skb, struct uml_net_private *lp) { return slirp_user_write(fd, skb->data, skb->len, (struct slirp_data *) &lp->user); } const struct net_kern_info slirp_kern_info = { .init = slirp_init, .protocol = slirp_protocol, .read = slirp_read, .write = slirp_write, }; static int slirp_setup(char *str, char **mac_out, void *data) { struct slirp_init *init = data; int i=0; *init = ((struct slirp_init) { .argw = { { "slirp", NULL } } }); str = split_if_spec(str, mac_out, NULL); if (str == NULL) /* no command line given after MAC addr */ return 1; do { if (i >= SLIRP_MAX_ARGS - 1) { printk(KERN_WARNING "slirp_setup: truncating slirp " "arguments\n"); break; } init->argw.argv[i++] = str; while(*str && *str!=',') { if (*str == '_') *str=' '; str++; } if (*str != ',') break; *str++ = '\0'; } while (1); init->argw.argv[i] = NULL; return 1; } static struct transport slirp_transport = { .list = LIST_HEAD_INIT(slirp_transport.list), .name = "slirp", .setup = slirp_setup, .user = &slirp_user_info, .kern = &slirp_kern_info, .private_size = sizeof(struct slirp_data), .setup_size = sizeof(struct slirp_init), }; static int register_slirp(void) { register_transport(&slirp_transport); return 0; } late_initcall(register_slirp);