blob: d53ff52bb40447942cff82fd93d001cfcc7200e1 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Dikecd1ae0e2007-10-16 01:27:29 -07002 * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 * James Leu (jleu@mindspring.net).
Jeff Dikecd1ae0e2007-10-16 01:27:29 -07004 * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * Copyright (C) 2001 by various other people who didn't put their name here.
6 * Licensed under the GPL.
7 */
8
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include "linux/init.h"
Jeff Dikecd1ae0e2007-10-16 01:27:29 -070010#include <linux/netdevice.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include "net_kern.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include "daemon.h"
13
14struct daemon_init {
15 char *sock_type;
16 char *ctl_sock;
17};
18
Paolo 'Blaisorblade' Giarrusso42947cb2006-02-01 03:06:29 -080019static void daemon_init(struct net_device *dev, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -070020{
21 struct uml_net_private *pri;
22 struct daemon_data *dpri;
23 struct daemon_init *init = data;
24
25 pri = dev->priv;
26 dpri = (struct daemon_data *) pri->user;
27 dpri->sock_type = init->sock_type;
28 dpri->ctl_sock = init->ctl_sock;
29 dpri->fd = -1;
30 dpri->control = -1;
31 dpri->dev = dev;
Paolo 'Blaisorblade' Giarrussoc42791b2006-01-18 17:42:53 -080032 /* We will free this pointer. If it contains crap we're burned. */
33 dpri->ctl_addr = NULL;
34 dpri->data_addr = NULL;
35 dpri->local_addr = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
Jeff Dikecd1ae0e2007-10-16 01:27:29 -070037 printk("daemon backend (uml_switch version %d) - %s:%s",
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 SWITCH_VERSION, dpri->sock_type, dpri->ctl_sock);
39 printk("\n");
40}
41
Jeff Dikeb53f35a2007-10-16 01:27:31 -070042static int daemon_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070043{
Jeff Dikeb53f35a2007-10-16 01:27:31 -070044 return net_recvfrom(fd, skb_mac_header(skb),
45 skb->dev->mtu + ETH_HEADER_OTHER);
Linus Torvalds1da177e2005-04-16 15:20:36 -070046}
47
Jeff Dikeb53f35a2007-10-16 01:27:31 -070048static int daemon_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070049{
Jeff Dikeb53f35a2007-10-16 01:27:31 -070050 return daemon_user_write(fd, skb->data, skb->len,
Jeff Dikecd1ae0e2007-10-16 01:27:29 -070051 (struct daemon_data *) &lp->user);
Linus Torvalds1da177e2005-04-16 15:20:36 -070052}
53
Jeff Dike5e7672e2006-09-27 01:50:33 -070054static const struct net_kern_info daemon_kern_info = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 .init = daemon_init,
56 .protocol = eth_protocol,
57 .read = daemon_read,
58 .write = daemon_write,
59};
60
Paolo 'Blaisorblade' Giarrusso42947cb2006-02-01 03:06:29 -080061static int daemon_setup(char *str, char **mac_out, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -070062{
63 struct daemon_init *init = data;
64 char *remain;
65
66 *init = ((struct daemon_init)
67 { .sock_type = "unix",
68 .ctl_sock = "/tmp/uml.ctl" });
Jeff Dikecd1ae0e2007-10-16 01:27:29 -070069
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 remain = split_if_spec(str, mac_out, &init->sock_type, &init->ctl_sock,
71 NULL);
Jeff Dikecd1ae0e2007-10-16 01:27:29 -070072 if (remain != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 printk(KERN_WARNING "daemon_setup : Ignoring data socket "
74 "specification\n");
Jeff Dikecd1ae0e2007-10-16 01:27:29 -070075
76 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077}
78
79static struct transport daemon_transport = {
80 .list = LIST_HEAD_INIT(daemon_transport.list),
81 .name = "daemon",
82 .setup = daemon_setup,
83 .user = &daemon_user_info,
84 .kern = &daemon_kern_info,
85 .private_size = sizeof(struct daemon_data),
86 .setup_size = sizeof(struct daemon_init),
87};
88
89static int register_daemon(void)
90{
91 register_transport(&daemon_transport);
Jeff Dikef4c57a72006-03-31 02:30:10 -080092 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070093}
94
Jeff Dike8210fd22006-12-06 20:34:55 -080095late_initcall(register_daemon);