summaryrefslogtreecommitdiff
path: root/source4/lib/socket/socket_unix.c
blob: 7cf12db4b2e503153338941c0311b3fb81f22e32 (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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
/* 
   Unix SMB/CIFS implementation.

   unix domain socket functions

   Copyright (C) Stefan Metzmacher 2004
   Copyright (C) Andrew Tridgell 2004-2005
   
   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.
*/

#include "includes.h"
#include "lib/socket/socket.h"
#include "lib/socket/socket.h"
#include "system/network.h"
#include "system/filesys.h"



/*
  approximate errno mapping
*/
static NTSTATUS unixdom_error(int ernum)
{
	return map_nt_error_from_unix(ernum);
}

static NTSTATUS unixdom_init(struct socket_context *sock)
{
	sock->fd = socket(PF_UNIX, SOCK_STREAM, 0);
	if (sock->fd == -1) {
		return NT_STATUS_INSUFFICIENT_RESOURCES;
	}
	sock->private_data = NULL;

	return NT_STATUS_OK;
}

static void unixdom_close(struct socket_context *sock)
{
	close(sock->fd);
}

static NTSTATUS unixdom_connect_complete(struct socket_context *sock, uint32_t flags)
{
	int error=0, ret;
	socklen_t len = sizeof(error);

	/* check for any errors that may have occurred - this is needed
	   for non-blocking connect */
	ret = getsockopt(sock->fd, SOL_SOCKET, SO_ERROR, &error, &len);
	if (ret == -1) {
		return map_nt_error_from_unix(errno);
	}
	if (error != 0) {
		return map_nt_error_from_unix(error);
	}

	if (!(flags & SOCKET_FLAG_BLOCK)) {
		ret = set_blocking(sock->fd, False);
		if (ret == -1) {
			return map_nt_error_from_unix(errno);
		}
	}

	sock->state = SOCKET_STATE_CLIENT_CONNECTED;

	return NT_STATUS_OK;
}

static NTSTATUS unixdom_connect(struct socket_context *sock,
				const char *my_address, int my_port,
				const char *srv_address, int srv_port,
				uint32_t flags)
{
	struct sockaddr_un srv_addr;
	int ret;

	if (strlen(srv_address)+1 > sizeof(srv_addr.sun_path)) {
		return NT_STATUS_INVALID_PARAMETER;
	}

	ZERO_STRUCT(srv_addr);
	srv_addr.sun_family = AF_UNIX;
	strncpy(srv_addr.sun_path, srv_address, sizeof(srv_addr.sun_path));

	ret = connect(sock->fd, (const struct sockaddr *)&srv_addr, sizeof(srv_addr));
	if (ret == -1) {
		return unixdom_error(errno);
	}

	return unixdom_connect_complete(sock, flags);
}

static NTSTATUS unixdom_listen(struct socket_context *sock,
			       const char *my_address, int port,
			       int queue_size, uint32_t flags)
{
	struct sockaddr_un my_addr;
	int ret;

	if (strlen(my_address)+1 > sizeof(my_addr.sun_path)) {
		return NT_STATUS_INVALID_PARAMETER;
	}

	/* delete if it already exists */
	unlink(my_address);

	ZERO_STRUCT(my_addr);
	my_addr.sun_family = AF_UNIX;
	strncpy(my_addr.sun_path, my_address, sizeof(my_addr.sun_path));

	ret = bind(sock->fd, (struct sockaddr *)&my_addr, sizeof(my_addr));
	if (ret == -1) {
		return unixdom_error(errno);
	}

	ret = listen(sock->fd, queue_size);
	if (ret == -1) {
		return unixdom_error(errno);
	}

	if (!(flags & SOCKET_FLAG_BLOCK)) {
		ret = set_blocking(sock->fd, False);
		if (ret == -1) {
			return unixdom_error(errno);
		}
	}

	sock->state = SOCKET_STATE_SERVER_LISTEN;
	sock->private_data = (void *)talloc_strdup(sock, my_address);

	return NT_STATUS_OK;
}

static NTSTATUS unixdom_accept(struct socket_context *sock, 
			       struct socket_context **new_sock)
{
	struct sockaddr_un cli_addr;
	socklen_t cli_addr_len = sizeof(cli_addr);
	int new_fd;

	new_fd = accept(sock->fd, (struct sockaddr *)&cli_addr, &cli_addr_len);
	if (new_fd == -1) {
		return unixdom_error(errno);
	}

	if (!(sock->flags & SOCKET_FLAG_BLOCK)) {
		int ret = set_blocking(new_fd, False);
		if (ret == -1) {
			close(new_fd);
			return map_nt_error_from_unix(errno);
		}
	}

	(*new_sock) = talloc(NULL, struct socket_context);
	if (!(*new_sock)) {
		close(new_fd);
		return NT_STATUS_NO_MEMORY;
	}

	/* copy the socket_context */
	(*new_sock)->type		= sock->type;
	(*new_sock)->state		= SOCKET_STATE_SERVER_CONNECTED;
	(*new_sock)->flags		= sock->flags;

	(*new_sock)->fd			= new_fd;

	(*new_sock)->private_data	= NULL;
	(*new_sock)->ops		= sock->ops;

	return NT_STATUS_OK;
}

static NTSTATUS unixdom_recv(struct socket_context *sock, void *buf, 
			     size_t wantlen, size_t *nread, uint32_t flags)
{
	ssize_t gotlen;
	int flgs = 0;

	/* TODO: we need to map all flags here */
	if (flags & SOCKET_FLAG_PEEK) {
		flgs |= MSG_PEEK;
	}

	if (flags & SOCKET_FLAG_BLOCK) {
		flgs |= MSG_WAITALL;
	}

	*nread = 0;

	gotlen = recv(sock->fd, buf, wantlen, flgs);
	if (gotlen == 0) {
		return NT_STATUS_END_OF_FILE;
	} else if (gotlen == -1) {
		return unixdom_error(errno);
	}

	*nread = gotlen;

	return NT_STATUS_OK;
}

static NTSTATUS unixdom_send(struct socket_context *sock,
			     const DATA_BLOB *blob, size_t *sendlen, uint32_t flags)
{
	ssize_t len;
	int flgs = 0;

	*sendlen = 0;

	len = send(sock->fd, blob->data, blob->length, flgs);
	if (len == -1) {
		return unixdom_error(errno);
	}	

	*sendlen = len;

	return NT_STATUS_OK;
}

static NTSTATUS unixdom_set_option(struct socket_context *sock, 
				   const char *option, const char *val)
{
	return NT_STATUS_OK;
}

static char *unixdom_get_peer_name(struct socket_context *sock, TALLOC_CTX *mem_ctx)
{
	return talloc_strdup(mem_ctx, "LOCAL/unixdom");
}

static char *unixdom_get_peer_addr(struct socket_context *sock, TALLOC_CTX *mem_ctx)
{
	return talloc_strdup(mem_ctx, "LOCAL/unixdom");
}

static int unixdom_get_peer_port(struct socket_context *sock)
{
	return 0;
}

static char *unixdom_get_my_addr(struct socket_context *sock, TALLOC_CTX *mem_ctx)
{
	return talloc_strdup(mem_ctx, "LOCAL/unixdom");
}

static int unixdom_get_my_port(struct socket_context *sock)
{
	return 0;
}

static int unixdom_get_fd(struct socket_context *sock)
{
	return sock->fd;
}

static const struct socket_ops unixdom_ops = {
	.name			= "unix",
	.fn_init		= unixdom_init,
	.fn_connect		= unixdom_connect,
	.fn_connect_complete	= unixdom_connect_complete,
	.fn_listen		= unixdom_listen,
	.fn_accept		= unixdom_accept,
	.fn_recv		= unixdom_recv,
	.fn_send		= unixdom_send,
	.fn_close		= unixdom_close,

	.fn_set_option		= unixdom_set_option,

	.fn_get_peer_name	= unixdom_get_peer_name,
	.fn_get_peer_addr	= unixdom_get_peer_addr,
	.fn_get_peer_port	= unixdom_get_peer_port,
	.fn_get_my_addr		= unixdom_get_my_addr,
	.fn_get_my_port		= unixdom_get_my_port,

	.fn_get_fd		= unixdom_get_fd
};

const struct socket_ops *socket_unixdom_ops(enum socket_type type)
{
	if (type != SOCKET_TYPE_STREAM) {
		return NULL;
	}
	return &unixdom_ops;
}