David Pursell | 0eb8e1b | 2016-01-14 17:18:27 -0800 | [diff] [blame] | 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 | |
David Pursell | 0eb8e1b | 2016-01-14 17:18:27 -0800 | [diff] [blame] | 29 | #include <cutils/sockets.h> |
| 30 | |
Elliott Hughes | 8e9aeb9 | 2017-11-10 10:22:07 -0800 | [diff] [blame] | 31 | #include <errno.h> |
| 32 | |
David Pursell | 0eb8e1b | 2016-01-14 17:18:27 -0800 | [diff] [blame] | 33 | #define LISTEN_BACKLOG 4 |
| 34 | |
| 35 | extern bool initialize_windows_sockets(); |
| 36 | |
| 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 | } |