blob: 1d73206984ea858a7dc0189165a708c5a574bf0a [file] [log] [blame]
/*
* Copyright (C) 2015 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <cutils/sockets.h>
#include <errno.h>
#define LISTEN_BACKLOG 4
extern bool initialize_windows_sockets();
SOCKET socket_inaddr_any_server(int port, int type) {
if (!initialize_windows_sockets()) {
return INVALID_SOCKET;
}
SOCKET sock = socket(AF_INET6, type, 0);
if (sock == INVALID_SOCKET) {
return INVALID_SOCKET;
}
// Enforce exclusive addresses so nobody can steal the port from us (1),
// and enable dual-stack so both IPv4 and IPv6 work (2).
// (1) https://msdn.microsoft.com/en-us/library/windows/desktop/ms740621(v=vs.85).aspx.
// (2) https://msdn.microsoft.com/en-us/library/windows/desktop/bb513665(v=vs.85).aspx.
int exclusive = 1;
DWORD v6_only = 0;
if (setsockopt(sock, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (char*)&exclusive,
sizeof(exclusive)) == SOCKET_ERROR ||
setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&v6_only,
sizeof(v6_only)) == SOCKET_ERROR) {
closesocket(sock);
return INVALID_SOCKET;
}
// Bind the socket to our local port.
struct sockaddr_in6 addr;
memset(&addr, 0, sizeof(addr));
addr.sin6_family = AF_INET6;
addr.sin6_port = htons(port);
addr.sin6_addr = in6addr_any;
if (bind(sock, (struct sockaddr*)&addr, sizeof(addr)) == SOCKET_ERROR) {
closesocket(sock);
return INVALID_SOCKET;
}
// Start listening for connections if this is a TCP socket.
if (type == SOCK_STREAM && listen(sock, LISTEN_BACKLOG) == SOCKET_ERROR) {
closesocket(sock);
return INVALID_SOCKET;
}
return sock;
}