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 #if !defined(_WIN32)
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
_socket_loopback_server(int family,int type,struct sockaddr * addr,size_t size)34 static int _socket_loopback_server(int family, int type, struct sockaddr * addr, size_t size)
35 {
36 int s, n;
37
38 s = socket(family, type, 0);
39 if(s < 0)
40 return -1;
41
42 n = 1;
43 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char *) &n, sizeof(n));
44
45 if(bind(s, addr, size) < 0) {
46 close(s);
47 return -1;
48 }
49
50 if (type == SOCK_STREAM) {
51 int ret;
52
53 ret = listen(s, LISTEN_BACKLOG);
54
55 if (ret < 0) {
56 close(s);
57 return -1;
58 }
59 }
60
61 return s;
62 }
63
64 /* open listen() port on loopback IPv6 interface */
socket_loopback_server6(int port,int type)65 int socket_loopback_server6(int port, int type)
66 {
67 struct sockaddr_in6 addr;
68
69 memset(&addr, 0, sizeof(addr));
70 addr.sin6_family = AF_INET6;
71 addr.sin6_port = htons(port);
72 addr.sin6_addr = in6addr_loopback;
73
74 return _socket_loopback_server(AF_INET6, type, (struct sockaddr *) &addr, sizeof(addr));
75 }
76
77 /* open listen() port on loopback interface */
socket_loopback_server(int port,int type)78 int socket_loopback_server(int port, int type)
79 {
80 struct sockaddr_in addr;
81
82 memset(&addr, 0, sizeof(addr));
83 addr.sin_family = AF_INET;
84 addr.sin_port = htons(port);
85 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
86
87 return _socket_loopback_server(AF_INET, type, (struct sockaddr *) &addr, sizeof(addr));
88 }
89