1/*
2** Copyright 2006, The Android Open Source Project
3**
4** Licensed under the Apache License, Version 2.0 (the "License");
5** you may not use this file except in compliance with the License.
6** You may obtain a copy of the License at
7**
8**     http://www.apache.org/licenses/LICENSE-2.0
9**
10** Unless required by applicable law or agreed to in writing, software
11** distributed under the License is distributed on an "AS IS" BASIS,
12** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13** See the License for the specific language governing permissions and
14** limitations under the License.
15*/
16
17#include <errno.h>
18#include <stddef.h>
19#include <stdlib.h>
20#include <string.h>
21#include <unistd.h>
22
23#define LISTEN_BACKLOG 4
24
25#ifndef HAVE_WINSOCK
26#include <sys/socket.h>
27#include <sys/select.h>
28#include <sys/types.h>
29#include <netinet/in.h>
30#endif
31
32#include <cutils/sockets.h>
33
34/* open listen() port on loopback interface */
35int socket_loopback_server(int port, int type)
36{
37    struct sockaddr_in addr;
38    int s, n;
39
40    memset(&addr, 0, sizeof(addr));
41    addr.sin_family = AF_INET;
42    addr.sin_port = htons(port);
43    addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
44
45    s = socket(AF_INET, type, 0);
46    if(s < 0) return -1;
47
48    n = 1;
49    setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char *) &n, sizeof(n));
50
51    if(bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
52        close(s);
53        return -1;
54    }
55
56    if (type == SOCK_STREAM) {
57        int ret;
58
59        ret = listen(s, LISTEN_BACKLOG);
60
61        if (ret < 0) {
62            close(s);
63            return -1;
64        }
65    }
66
67    return s;
68}
69
70