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 */
37int 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