1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
4*4882a593Smuzhiyun * James Leu (jleu@mindspring.net).
5*4882a593Smuzhiyun * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
6*4882a593Smuzhiyun * Copyright (C) 2001 by various other people who didn't put their name here.
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/init.h>
10*4882a593Smuzhiyun #include <linux/netdevice.h>
11*4882a593Smuzhiyun #include <net_kern.h>
12*4882a593Smuzhiyun #include "daemon.h"
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun struct daemon_init {
15*4882a593Smuzhiyun char *sock_type;
16*4882a593Smuzhiyun char *ctl_sock;
17*4882a593Smuzhiyun };
18*4882a593Smuzhiyun
daemon_init(struct net_device * dev,void * data)19*4882a593Smuzhiyun static void daemon_init(struct net_device *dev, void *data)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun struct uml_net_private *pri;
22*4882a593Smuzhiyun struct daemon_data *dpri;
23*4882a593Smuzhiyun struct daemon_init *init = data;
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun pri = netdev_priv(dev);
26*4882a593Smuzhiyun dpri = (struct daemon_data *) pri->user;
27*4882a593Smuzhiyun dpri->sock_type = init->sock_type;
28*4882a593Smuzhiyun dpri->ctl_sock = init->ctl_sock;
29*4882a593Smuzhiyun dpri->fd = -1;
30*4882a593Smuzhiyun dpri->control = -1;
31*4882a593Smuzhiyun dpri->dev = dev;
32*4882a593Smuzhiyun /* We will free this pointer. If it contains crap we're burned. */
33*4882a593Smuzhiyun dpri->ctl_addr = NULL;
34*4882a593Smuzhiyun dpri->data_addr = NULL;
35*4882a593Smuzhiyun dpri->local_addr = NULL;
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun printk("daemon backend (uml_switch version %d) - %s:%s",
38*4882a593Smuzhiyun SWITCH_VERSION, dpri->sock_type, dpri->ctl_sock);
39*4882a593Smuzhiyun printk("\n");
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
daemon_read(int fd,struct sk_buff * skb,struct uml_net_private * lp)42*4882a593Smuzhiyun static int daemon_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
43*4882a593Smuzhiyun {
44*4882a593Smuzhiyun return net_recvfrom(fd, skb_mac_header(skb),
45*4882a593Smuzhiyun skb->dev->mtu + ETH_HEADER_OTHER);
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun
daemon_write(int fd,struct sk_buff * skb,struct uml_net_private * lp)48*4882a593Smuzhiyun static int daemon_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
49*4882a593Smuzhiyun {
50*4882a593Smuzhiyun return daemon_user_write(fd, skb->data, skb->len,
51*4882a593Smuzhiyun (struct daemon_data *) &lp->user);
52*4882a593Smuzhiyun }
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun static const struct net_kern_info daemon_kern_info = {
55*4882a593Smuzhiyun .init = daemon_init,
56*4882a593Smuzhiyun .protocol = eth_protocol,
57*4882a593Smuzhiyun .read = daemon_read,
58*4882a593Smuzhiyun .write = daemon_write,
59*4882a593Smuzhiyun };
60*4882a593Smuzhiyun
daemon_setup(char * str,char ** mac_out,void * data)61*4882a593Smuzhiyun static int daemon_setup(char *str, char **mac_out, void *data)
62*4882a593Smuzhiyun {
63*4882a593Smuzhiyun struct daemon_init *init = data;
64*4882a593Smuzhiyun char *remain;
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun *init = ((struct daemon_init)
67*4882a593Smuzhiyun { .sock_type = "unix",
68*4882a593Smuzhiyun .ctl_sock = "/tmp/uml.ctl" });
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun remain = split_if_spec(str, mac_out, &init->sock_type, &init->ctl_sock,
71*4882a593Smuzhiyun NULL);
72*4882a593Smuzhiyun if (remain != NULL)
73*4882a593Smuzhiyun printk(KERN_WARNING "daemon_setup : Ignoring data socket "
74*4882a593Smuzhiyun "specification\n");
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun return 1;
77*4882a593Smuzhiyun }
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun static struct transport daemon_transport = {
80*4882a593Smuzhiyun .list = LIST_HEAD_INIT(daemon_transport.list),
81*4882a593Smuzhiyun .name = "daemon",
82*4882a593Smuzhiyun .setup = daemon_setup,
83*4882a593Smuzhiyun .user = &daemon_user_info,
84*4882a593Smuzhiyun .kern = &daemon_kern_info,
85*4882a593Smuzhiyun .private_size = sizeof(struct daemon_data),
86*4882a593Smuzhiyun .setup_size = sizeof(struct daemon_init),
87*4882a593Smuzhiyun };
88*4882a593Smuzhiyun
register_daemon(void)89*4882a593Smuzhiyun static int register_daemon(void)
90*4882a593Smuzhiyun {
91*4882a593Smuzhiyun register_transport(&daemon_transport);
92*4882a593Smuzhiyun return 0;
93*4882a593Smuzhiyun }
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun late_initcall(register_daemon);
96