1 /*
2 * Copyright (C) 2015 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <errno.h>
30
31 #include <cutils/sockets.h>
32
33 #define LISTEN_BACKLOG 4
34
35 extern bool initialize_windows_sockets();
36
socket_inaddr_any_server(int port,int type)37 SOCKET socket_inaddr_any_server(int port, int type) {
38 if (!initialize_windows_sockets()) {
39 return INVALID_SOCKET;
40 }
41
42 SOCKET sock = socket(AF_INET6, type, 0);
43 if (sock == INVALID_SOCKET) {
44 return INVALID_SOCKET;
45 }
46
47 // Enforce exclusive addresses so nobody can steal the port from us (1),
48 // and enable dual-stack so both IPv4 and IPv6 work (2).
49 // (1) https://msdn.microsoft.com/en-us/library/windows/desktop/ms740621(v=vs.85).aspx.
50 // (2) https://msdn.microsoft.com/en-us/library/windows/desktop/bb513665(v=vs.85).aspx.
51 int exclusive = 1;
52 DWORD v6_only = 0;
53 if (setsockopt(sock, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (char*)&exclusive,
54 sizeof(exclusive)) == SOCKET_ERROR ||
55 setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&v6_only,
56 sizeof(v6_only)) == SOCKET_ERROR) {
57 closesocket(sock);
58 return INVALID_SOCKET;
59 }
60
61 // Bind the socket to our local port.
62 struct sockaddr_in6 addr;
63 memset(&addr, 0, sizeof(addr));
64 addr.sin6_family = AF_INET6;
65 addr.sin6_port = htons(port);
66 addr.sin6_addr = in6addr_any;
67 if (bind(sock, (struct sockaddr*)&addr, sizeof(addr)) == SOCKET_ERROR) {
68 closesocket(sock);
69 return INVALID_SOCKET;
70 }
71
72 // Start listening for connections if this is a TCP socket.
73 if (type == SOCK_STREAM && listen(sock, LISTEN_BACKLOG) == SOCKET_ERROR) {
74 closesocket(sock);
75 return INVALID_SOCKET;
76 }
77
78 return sock;
79 }
80