2 * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
4 * James Leu (jleu@mindspring.net).
5 * Copyright (C) 2001 by various other people who didn't put their name here.
6 * Licensed under the GPL.
12 #include <sys/types.h>
13 #include <sys/socket.h>
19 #include <um_malloc.h>
21 enum request_type { REQ_NEW_CONTROL };
23 #define SWITCH_MAGIC 0xfeedface
28 enum request_type type;
29 struct sockaddr_un sock;
32 static struct sockaddr_un *new_addr(void *name, int len)
34 struct sockaddr_un *sun;
36 sun = uml_kmalloc(sizeof(struct sockaddr_un), UM_GFP_KERNEL);
38 printk(UM_KERN_ERR "new_addr: allocation of sockaddr_un "
42 sun->sun_family = AF_UNIX;
43 memcpy(sun->sun_path, name, len);
47 static int connect_to_switch(struct daemon_data *pri)
49 struct sockaddr_un *ctl_addr = pri->ctl_addr;
50 struct sockaddr_un *local_addr = pri->local_addr;
51 struct sockaddr_un *sun;
52 struct request_v3 req;
55 pri->control = socket(AF_UNIX, SOCK_STREAM, 0);
56 if (pri->control < 0) {
58 printk(UM_KERN_ERR "daemon_open : control socket failed, "
59 "errno = %d\n", -err);
63 if (connect(pri->control, (struct sockaddr *) ctl_addr,
64 sizeof(*ctl_addr)) < 0) {
66 printk(UM_KERN_ERR "daemon_open : control connect failed, "
67 "errno = %d\n", -err);
71 fd = socket(AF_UNIX, SOCK_DGRAM, 0);
74 printk(UM_KERN_ERR "daemon_open : data socket failed, "
75 "errno = %d\n", -err);
78 if (bind(fd, (struct sockaddr *) local_addr, sizeof(*local_addr)) < 0) {
80 printk(UM_KERN_ERR "daemon_open : data bind failed, "
81 "errno = %d\n", -err);
85 sun = uml_kmalloc(sizeof(struct sockaddr_un), UM_GFP_KERNEL);
87 printk(UM_KERN_ERR "new_addr: allocation of sockaddr_un "
93 req.magic = SWITCH_MAGIC;
94 req.version = SWITCH_VERSION;
95 req.type = REQ_NEW_CONTROL;
96 req.sock = *local_addr;
97 n = write(pri->control, &req, sizeof(req));
98 if (n != sizeof(req)) {
99 printk(UM_KERN_ERR "daemon_open : control setup request "
100 "failed, err = %d\n", -errno);
105 n = read(pri->control, sun, sizeof(*sun));
106 if (n != sizeof(*sun)) {
107 printk(UM_KERN_ERR "daemon_open : read of data socket failed, "
108 "err = %d\n", -errno);
113 pri->data_addr = sun;
125 static int daemon_user_init(void *data, void *dev)
127 struct daemon_data *pri = data;
135 if (!strcmp(pri->sock_type, "unix"))
136 pri->ctl_addr = new_addr(pri->ctl_sock,
137 strlen(pri->ctl_sock) + 1);
139 name.pid = os_getpid();
140 gettimeofday(&tv, NULL);
141 name.usecs = tv.tv_usec;
142 pri->local_addr = new_addr(&name, sizeof(name));
144 pri->fd = connect_to_switch(pri);
146 kfree(pri->local_addr);
147 pri->local_addr = NULL;
154 static int daemon_open(void *data)
156 struct daemon_data *pri = data;
160 static void daemon_remove(void *data)
162 struct daemon_data *pri = data;
169 kfree(pri->data_addr);
170 pri->data_addr = NULL;
171 kfree(pri->ctl_addr);
172 pri->ctl_addr = NULL;
173 kfree(pri->local_addr);
174 pri->local_addr = NULL;
177 int daemon_user_write(int fd, void *buf, int len, struct daemon_data *pri)
179 struct sockaddr_un *data_addr = pri->data_addr;
181 return net_sendto(fd, buf, len, data_addr, sizeof(*data_addr));
184 const struct net_user_info daemon_user_info = {
185 .init = daemon_user_init,
188 .remove = daemon_remove,
190 .delete_address = NULL,
191 .mtu = ETH_MAX_PACKET,
192 .max_packet = ETH_MAX_PACKET + ETH_HEADER_OTHER,