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 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 35 printk("daemon backend (uml_switch version %d) - %s:%s", 36 SWITCH_VERSION, dpri->sock_type, dpri->ctl_sock); 37 printk("\n"); 38 } 39 40 static int daemon_read(int fd, struct sk_buff **skb, 41 struct uml_net_private *lp) 42 { 43 *skb = ether_adjust_skb(*skb, ETH_HEADER_OTHER); 44 if(*skb == NULL) return(-ENOMEM); 45 return(net_recvfrom(fd, (*skb)->mac.raw, 46 (*skb)->dev->mtu + ETH_HEADER_OTHER)); 47 } 48 49 static int daemon_write(int fd, struct sk_buff **skb, 50 struct uml_net_private *lp) 51 { 52 return(daemon_user_write(fd, (*skb)->data, (*skb)->len, 53 (struct daemon_data *) &lp->user)); 54 } 55 56 static struct net_kern_info daemon_kern_info = { 57 .init = daemon_init, 58 .protocol = eth_protocol, 59 .read = daemon_read, 60 .write = daemon_write, 61 }; 62 63 int daemon_setup(char *str, char **mac_out, void *data) 64 { 65 struct daemon_init *init = data; 66 char *remain; 67 68 *init = ((struct daemon_init) 69 { .sock_type = "unix", 70 .ctl_sock = "/tmp/uml.ctl" }); 71 72 remain = split_if_spec(str, mac_out, &init->sock_type, &init->ctl_sock, 73 NULL); 74 if(remain != NULL) 75 printk(KERN_WARNING "daemon_setup : Ignoring data socket " 76 "specification\n"); 77 78 return(1); 79 } 80 81 static struct transport daemon_transport = { 82 .list = LIST_HEAD_INIT(daemon_transport.list), 83 .name = "daemon", 84 .setup = daemon_setup, 85 .user = &daemon_user_info, 86 .kern = &daemon_kern_info, 87 .private_size = sizeof(struct daemon_data), 88 .setup_size = sizeof(struct daemon_init), 89 }; 90 91 static int register_daemon(void) 92 { 93 register_transport(&daemon_transport); 94 return(1); 95 } 96 97 __initcall(register_daemon); 98 99 /* 100 * Overrides for Emacs so that we follow Linus's tabbing style. 101 * Emacs will notice this stuff at the end of the file and automatically 102 * adjust the settings for this buffer only. This must remain at the end 103 * of the file. 104 * --------------------------------------------------------------------------- 105 * Local variables: 106 * c-file-style: "linux" 107 * End: 108 */ 109