summaryrefslogtreecommitdiffstats
path: root/src/local.c
blob: 258605f14cde501314083a5d4d3197c8bf0fbdcd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
/*
 * (C) 2006-2007 by Pablo Neira Ayuso <pablo@netfilter.org>
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Description: UNIX sockets library
 */

#include "local.h"

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <arpa/inet.h>
#include <sys/un.h>

int local_server_create(struct local_server *server, struct local_conf *conf)
{
	int fd;
	int len;
	struct sockaddr_un local;

	if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
		return -1;

	if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &conf->reuseaddr, 
				sizeof(conf->reuseaddr)) == -1) {
		close(fd);
		unlink(conf->path);
		return -1;
	}

	local.sun_family = AF_UNIX;
	strcpy(local.sun_path, conf->path);
	len = strlen(local.sun_path) + sizeof(local.sun_family);
	unlink(conf->path);

	if (bind(fd, (struct sockaddr *) &local, len) == -1) {
		close(fd);
		unlink(conf->path);
		return -1;
	}

	if (listen(fd, conf->backlog) == -1) {
		close(fd);
		unlink(conf->path);
		return -1;
	}

	server->fd = fd;
	strcpy(server->path, conf->path);

	return 0;
}

void local_server_destroy(struct local_server *server)
{
	unlink(server->path);
	close(server->fd);
}

int do_local_server_step(struct local_server *server, void *data, 
			 void (*process)(int fd, void *data))
{
	int rfd;
	struct sockaddr_un local;
	socklen_t sin_size = sizeof(struct sockaddr_un);
	
	rfd = accept(server->fd, (struct sockaddr *) &local, &sin_size);
	if (rfd == -1)
		return -1;

	process(rfd, data);
	close(rfd);

	return 0;
}

int local_client_create(struct local_conf *conf)
{
	int len;
	struct sockaddr_un local;
	int fd;

	if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
		return -1;

	local.sun_family = AF_UNIX;
	strcpy(local.sun_path, conf->path);
	len = strlen(local.sun_path) + sizeof(local.sun_family);

	if (connect(fd, (struct sockaddr *) &local, len) == -1) {
		close(fd);
		return -1;
	}

	return fd;
}

void local_client_destroy(int fd)
{
	close(fd);
}

int do_local_client_step(int fd, void (*process)(char *buf))
{
	int numbytes;
	char buf[1024];

	memset(buf, 0, sizeof(buf));
	while ((numbytes = recv(fd, buf, sizeof(buf)-1, 0)) > 0) {
		buf[sizeof(buf)-1] = '\0';
		if (process)
			process(buf);
		memset(buf, 0, sizeof(buf));
	}

	return 0;
}

void local_step(char *buf)
{
	printf(buf);
}

int do_local_request(int request,
		     struct local_conf *conf,
		     void (*step)(char *buf))
{
	int fd, ret;

	fd = local_client_create(conf);
	if (fd == -1)
		return -1;

	ret = send(fd, &request, sizeof(int), 0);
	if (ret == -1)
		return -1;

	do_local_client_step(fd, step);

	local_client_destroy(fd);
	
	return 0;
}