[deliverable/linux.git] / arch / um / drivers / daemon_user.c

/*
 * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and 
 * James Leu (jleu@mindspring.net).
 * Copyright (C) 2001 by various other people who didn't put their name here.
 * Licensed under the GPL.
 */

#include <errno.h>
#include <unistd.h>
#include <stdint.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/time.h>
#include "net_user.h"
#include "daemon.h"
#include "kern_util.h"
#include "user_util.h"
#include "user.h"
#include "os.h"

#define MAX_PACKET (ETH_MAX_PACKET + ETH_HEADER_OTHER)

enum request_type { REQ_NEW_CONTROL };

#define SWITCH_MAGIC 0xfeedface

struct request_v3 {
	uint32_t magic;
	uint32_t version;
	enum request_type type;
	struct sockaddr_un sock;
};

static struct sockaddr_un *new_addr(void *name, int len)
{
	struct sockaddr_un *sun;

	sun = um_kmalloc(sizeof(struct sockaddr_un));
	if(sun == NULL){
		printk("new_addr: allocation of sockaddr_un failed\n");
		return(NULL);
	}
	sun->sun_family = AF_UNIX;
	memcpy(sun->sun_path, name, len);
	return(sun);
}

static int connect_to_switch(struct daemon_data *pri)
{
	struct sockaddr_un *ctl_addr = pri->ctl_addr;
	struct sockaddr_un *local_addr = pri->local_addr;
	struct sockaddr_un *sun;
	struct request_v3 req;
	int fd, n, err;

	pri->control = socket(AF_UNIX, SOCK_STREAM, 0);
	if(pri->control < 0){
		printk("daemon_open : control socket failed, errno = %d\n", 
		       errno);		
		return(-errno);
	}

	if(connect(pri->control, (struct sockaddr *) ctl_addr, 
		   sizeof(*ctl_addr)) < 0){
		printk("daemon_open : control connect failed, errno = %d\n",
		       errno);
		err = -errno;
		goto out;
	}

	fd = socket(AF_UNIX, SOCK_DGRAM, 0);
	if(fd < 0){
		printk("daemon_open : data socket failed, errno = %d\n", 
		       errno);
		err = -errno;
		goto out;
	}
	if(bind(fd, (struct sockaddr *) local_addr, sizeof(*local_addr)) < 0){
		printk("daemon_open : data bind failed, errno = %d\n", 
		       errno);
		err = -errno;
		goto out_close;
	}

	sun = um_kmalloc(sizeof(struct sockaddr_un));
	if(sun == NULL){
		printk("new_addr: allocation of sockaddr_un failed\n");
		err = -ENOMEM;
		goto out_close;
	}

	req.magic = SWITCH_MAGIC;
	req.version = SWITCH_VERSION;
	req.type = REQ_NEW_CONTROL;
	req.sock = *local_addr;
	n = os_write_file(pri->control, &req, sizeof(req));
	if(n != sizeof(req)){
		printk("daemon_open : control setup request failed, err = %d\n",
		       -n);
		err = -ENOTCONN;
		goto out_free;
	}

	n = os_read_file(pri->control, sun, sizeof(*sun));
	if(n != sizeof(*sun)){
		printk("daemon_open : read of data socket failed, err = %d\n",
		       -n);
		err = -ENOTCONN;
		goto out_free;
	}

	pri->data_addr = sun;
	return(fd);

 out_free:
	kfree(sun);
 out_close:
	os_close_file(fd);
 out:
	os_close_file(pri->control);
	return(err);
}

static void daemon_user_init(void *data, void *dev)
{
	struct daemon_data *pri = data;
	struct timeval tv;
	struct {
		char zero;
		int pid;
		int usecs;
	} name;

	if(!strcmp(pri->sock_type, "unix"))
		pri->ctl_addr = new_addr(pri->ctl_sock, 
					 strlen(pri->ctl_sock) + 1);
	name.zero = 0;
	name.pid = os_getpid();
	gettimeofday(&tv, NULL);
	name.usecs = tv.tv_usec;
	pri->local_addr = new_addr(&name, sizeof(name));
	pri->dev = dev;
	pri->fd = connect_to_switch(pri);
	if(pri->fd < 0){
		kfree(pri->local_addr);
		pri->local_addr = NULL;
	}
}

static int daemon_open(void *data)
{
	struct daemon_data *pri = data;
	return(pri->fd);
}

static void daemon_remove(void *data)
{
	struct daemon_data *pri = data;

	os_close_file(pri->fd);
	pri->fd = -1;
	os_close_file(pri->control);
	pri->control = -1;

	kfree(pri->data_addr);
	pri->data_addr = NULL;
	kfree(pri->ctl_addr);
	pri->ctl_addr = NULL;
	kfree(pri->local_addr);
	pri->local_addr = NULL;
}

int daemon_user_write(int fd, void *buf, int len, struct daemon_data *pri)
{
	struct sockaddr_un *data_addr = pri->data_addr;

	return(net_sendto(fd, buf, len, data_addr, sizeof(*data_addr)));
}

static int daemon_set_mtu(int mtu, void *data)
{
	return(mtu);
}

const struct net_user_info daemon_user_info = {
	.init		= daemon_user_init,
	.open		= daemon_open,
	.close	 	= NULL,
	.remove	 	= daemon_remove,
	.set_mtu	= daemon_set_mtu,
	.add_address	= NULL,
	.delete_address = NULL,
	.max_packet	= MAX_PACKET - ETH_HEADER_OTHER
};

/*
 * Overrides for Emacs so that we follow Linus's tabbing style.
 * Emacs will notice this stuff at the end of the file and automatically
 * adjust the settings for this buffer only.  This must remain at the end
 * of the file.
 * ---------------------------------------------------------------------------
 * Local variables:
 * c-file-style: "linux"
 * End:
 */
Commit	Line	Data
1da177e4 LT	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 <errno.h>
	9	#include <unistd.h>
	10	#include <stdint.h>
	11	#include <sys/socket.h>
	12	#include <sys/un.h>
	13	#include <sys/time.h>
	14	#include "net_user.h"
	15	#include "daemon.h"
	16	#include "kern_util.h"
	17	#include "user_util.h"
	18	#include "user.h"
	19	#include "os.h"
	20
	21	#define MAX_PACKET (ETH_MAX_PACKET + ETH_HEADER_OTHER)
	22
	23	enum request_type { REQ_NEW_CONTROL };
	24
	25	#define SWITCH_MAGIC 0xfeedface
	26
	27	struct request_v3 {
	28	uint32_t magic;
	29	uint32_t version;
	30	enum request_type type;
	31	struct sockaddr_un sock;
	32	};
	33
	34	static struct sockaddr_un new_addr(void name, int len)
	35	{
	36	struct sockaddr_un *sun;
	37
	38	sun = um_kmalloc(sizeof(struct sockaddr_un));
	39	if(sun == NULL){
	40	printk("new_addr: allocation of sockaddr_un failed\n");
	41	return(NULL);
	42	}
	43	sun->sun_family = AF_UNIX;
	44	memcpy(sun->sun_path, name, len);
	45	return(sun);
	46	}
	47
	48	static int connect_to_switch(struct daemon_data *pri)
	49	{
	50	struct sockaddr_un *ctl_addr = pri->ctl_addr;
	51	struct sockaddr_un *local_addr = pri->local_addr;
	52	struct sockaddr_un *sun;
	53	struct request_v3 req;
	54	int fd, n, err;
	55
	56	pri->control = socket(AF_UNIX, SOCK_STREAM, 0);
	57	if(pri->control < 0){
	58	printk("daemon_open : control socket failed, errno = %d\n",
	59	errno);
	60	return(-errno);
	61	}
	62
	63	if(connect(pri->control, (struct sockaddr *) ctl_addr,
	64	sizeof(*ctl_addr)) < 0){
65	printk("daemon_open : control connect failed, errno = %d\n",
66	errno);
67	err = -errno;
68	goto out;
69	}
70
71	fd = socket(AF_UNIX, SOCK_DGRAM, 0);
72	if(fd < 0){
73	printk("daemon_open : data socket failed, errno = %d\n",
74	errno);
75	err = -errno;
76	goto out;
77	}
78	if(bind(fd, (struct sockaddr ) local_addr, sizeof(local_addr)) < 0){
79	printk("daemon_open : data bind failed, errno = %d\n",
80	errno);
81	err = -errno;
82	goto out_close;
83	}
84
85	sun = um_kmalloc(sizeof(struct sockaddr_un));
86	if(sun == NULL){
87	printk("new_addr: allocation of sockaddr_un failed\n");
88	err = -ENOMEM;
89	goto out_close;
90	}
91
92	req.magic = SWITCH_MAGIC;
93	req.version = SWITCH_VERSION;
94	req.type = REQ_NEW_CONTROL;
95	req.sock = *local_addr;
96	n = os_write_file(pri->control, &req, sizeof(req));
97	if(n != sizeof(req)){
98	printk("daemon_open : control setup request failed, err = %d\n",
99	-n);
100	err = -ENOTCONN;
ba260e23	101	goto out_free;
1da177e4 LT	102	}
	103
	104	n = os_read_file(pri->control, sun, sizeof(*sun));
	105	if(n != sizeof(*sun)){
	106	printk("daemon_open : read of data socket failed, err = %d\n",
	107	-n);
	108	err = -ENOTCONN;
ba260e23	109	goto out_free;
1da177e4 LT	110	}
	111
	112	pri->data_addr = sun;
	113	return(fd);
	114
ba260e23 PBG	115	out_free:
ba260e23 PBG	116	kfree(sun);
1da177e4 LT	117	out_close:
	118	os_close_file(fd);
	119	out:
	120	os_close_file(pri->control);
	121	return(err);
	122	}
	123
	124	static void daemon_user_init(void data, void dev)
	125	{
	126	struct daemon_data *pri = data;
	127	struct timeval tv;
	128	struct {
	129	char zero;
	130	int pid;
	131	int usecs;
	132	} name;
	133
	134	if(!strcmp(pri->sock_type, "unix"))
	135	pri->ctl_addr = new_addr(pri->ctl_sock,
	136	strlen(pri->ctl_sock) + 1);
	137	name.zero = 0;
	138	name.pid = os_getpid();
	139	gettimeofday(&tv, NULL);
	140	name.usecs = tv.tv_usec;
	141	pri->local_addr = new_addr(&name, sizeof(name));
	142	pri->dev = dev;
	143	pri->fd = connect_to_switch(pri);
	144	if(pri->fd < 0){
	145	kfree(pri->local_addr);
	146	pri->local_addr = NULL;
	147	}
	148	}
	149
	150	static int daemon_open(void *data)
	151	{
	152	struct daemon_data *pri = data;
	153	return(pri->fd);
	154	}
	155
	156	static void daemon_remove(void *data)
	157	{
	158	struct daemon_data *pri = data;
	159
	160	os_close_file(pri->fd);
c42791b6	161	pri->fd = -1;
1da177e4	162	os_close_file(pri->control);
c42791b6 PBG	163	pri->control = -1;
c42791b6 PBG	164
41f2148a	165	kfree(pri->data_addr);
c42791b6	166	pri->data_addr = NULL;
41f2148a	167	kfree(pri->ctl_addr);
c42791b6	168	pri->ctl_addr = NULL;
41f2148a	169	kfree(pri->local_addr);
c42791b6	170	pri->local_addr = NULL;
1da177e4 LT	171	}
	172
	173	int daemon_user_write(int fd, void buf, int len, struct daemon_data pri)
	174	{
	175	struct sockaddr_un *data_addr = pri->data_addr;
	176
	177	return(net_sendto(fd, buf, len, data_addr, sizeof(*data_addr)));
	178	}
	179
	180	static int daemon_set_mtu(int mtu, void *data)
	181	{
	182	return(mtu);
	183	}
	184
5e7672ec	185	const struct net_user_info daemon_user_info = {
1da177e4 LT	186	.init = daemon_user_init,
	187	.open = daemon_open,
	188	.close = NULL,
	189	.remove = daemon_remove,
	190	.set_mtu = daemon_set_mtu,
	191	.add_address = NULL,
	192	.delete_address = NULL,
	193	.max_packet = MAX_PACKET - ETH_HEADER_OTHER
	194	};
	195
	196	/*
	197	* Overrides for Emacs so that we follow Linus's tabbing style.
	198	* Emacs will notice this stuff at the end of the file and automatically
	199	* adjust the settings for this buffer only. This must remain at the end
	200	* of the file.
	201	* ---------------------------------------------------------------------------
	202	* Local variables:
	203	* c-file-style: "linux"
	204	* End:
	205	*/