1 /* libs/cutils/socket_loopback_client.c
2 **
3 ** Copyright 2006, The Android Open Source Project
4 **
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
8 **
9 ** http://www.apache.org/licenses/LICENSE-2.0
10 **
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
16 */
17
18 #include <cutils/sockets.h>
19
20 #include <stdlib.h>
21 #include <string.h>
22 #include <unistd.h>
23 #include <errno.h>
24 #include <stddef.h>
25
26 #ifndef HAVE_WINSOCK
27 #include <sys/socket.h>
28 #include <sys/select.h>
29 #include <sys/types.h>
30 #include <netinet/in.h>
31 #endif
32
33 /* Connect to port on the loopback IP interface. type is
34 * SOCK_STREAM or SOCK_DGRAM.
35 * return is a file descriptor or -1 on error
36 */
socket_loopback_client(int port,int type)37 int socket_loopback_client(int port, int type)
38 {
39 struct sockaddr_in addr;
40 socklen_t alen;
41 int s;
42
43 memset(&addr, 0, sizeof(addr));
44 addr.sin_family = AF_INET;
45 addr.sin_port = htons(port);
46 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
47
48 s = socket(AF_INET, type, 0);
49 if(s < 0) return -1;
50
51 if(connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
52 close(s);
53 return -1;
54 }
55
56 return s;
57
58 }
59
60