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
16struct daemon_init {
17	char *sock_type;
18	char *ctl_sock;
19};
20
21static 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
44static 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_header(*skb),
50			    (*skb)->dev->mtu + ETH_HEADER_OTHER));
51}
52
53static 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
60static const 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
67static 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
85static 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
95static int register_daemon(void)
96{
97	register_transport(&daemon_transport);
98	return 0;
99}
100
101late_initcall(register_daemon);
102