1 /* 2 * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and 3 * James Leu (jleu@mindspring.net). 4 * Copyright (C) 2001 by various other people who didn't put their name here. 5 * Licensed under the GPL. 6 */ 7 8 #include "linux/kernel.h" 9 #include "linux/init.h" 10 #include "linux/netdevice.h" 11 #include "linux/etherdevice.h" 12 #include "net_kern.h" 13 #include "net_user.h" 14 #include "daemon.h" 15 16 struct daemon_init { 17 char *sock_type; 18 char *ctl_sock; 19 }; 20 21 static void daemon_init(struct net_device *dev, void *data) 22 { 23 struct uml_net_private *pri; 24 struct daemon_data *dpri; 25 struct daemon_init *init = data; 26 27 pri = dev->priv; 28 dpri = (struct daemon_data *) pri->user; 29 dpri->sock_type = init->sock_type; 30 dpri->ctl_sock = init->ctl_sock; 31 dpri->fd = -1; 32 dpri->control = -1; 33 dpri->dev = dev; 34 /* We will free this pointer. If it contains crap we're burned. */ 35 dpri->ctl_addr = NULL; 36 dpri->data_addr = NULL; 37 dpri->local_addr = NULL; 38 39 printk("daemon backend (uml_switch version %d) - %s:%s", 40 SWITCH_VERSION, dpri->sock_type, dpri->ctl_sock); 41 printk("\n"); 42 } 43 44 static int daemon_read(int fd, struct sk_buff **skb, 45 struct uml_net_private *lp) 46 { 47 *skb = ether_adjust_skb(*skb, ETH_HEADER_OTHER); 48 if(*skb == NULL) return(-ENOMEM); 49 return(net_recvfrom(fd, (*skb)->mac.raw, 50 (*skb)->dev->mtu + ETH_HEADER_OTHER)); 51 } 52 53 static int daemon_write(int fd, struct sk_buff **skb, 54 struct uml_net_private *lp) 55 { 56 return(daemon_user_write(fd, (*skb)->data, (*skb)->len, 57 (struct daemon_data *) &lp->user)); 58 } 59 60 static struct net_kern_info daemon_kern_info = { 61 .init = daemon_init, 62 .protocol = eth_protocol, 63 .read = daemon_read, 64 .write = daemon_write, 65 }; 66 67 static int daemon_setup(char *str, char **mac_out, void *data) 68 { 69 struct daemon_init *init = data; 70 char *remain; 71 72 *init = ((struct daemon_init) 73 { .sock_type = "unix", 74 .ctl_sock = "/tmp/uml.ctl" }); 75 76 remain = split_if_spec(str, mac_out, &init->sock_type, &init->ctl_sock, 77 NULL); 78 if(remain != NULL) 79 printk(KERN_WARNING "daemon_setup : Ignoring data socket " 80 "specification\n"); 81 82 return(1); 83 } 84 85 static struct transport daemon_transport = { 86 .list = LIST_HEAD_INIT(daemon_transport.list), 87 .name = "daemon", 88 .setup = daemon_setup, 89 .user = &daemon_user_info, 90 .kern = &daemon_kern_info, 91 .private_size = sizeof(struct daemon_data), 92 .setup_size = sizeof(struct daemon_init), 93 }; 94 95 static int register_daemon(void) 96 { 97 register_transport(&daemon_transport); 98 return 0; 99 } 100 101 __initcall(register_daemon); 102