libhdhomerun/hdhomerun_sock_windows.c - vendor/opensource/hdhomerun_plugin - Git at Google

 /*
  * hdhomerun_sock_windows.c
  *
  * Copyright © 2010 Silicondust USA Inc. <www.silicondust.com>.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
  *
  * As a special exception to the GNU Lesser General Public License,
  * you may link, statically or dynamically, an application with a
  * publicly distributed version of the Library to produce an
  * executable file containing portions of the Library, and
  * distribute that executable file under terms of your choice,
  * without any of the additional requirements listed in clause 4 of
  * the GNU Lesser General Public License.
  *
  * By "a publicly distributed version of the Library", we mean
  * either the unmodified Library as distributed by Silicondust, or a
  * modified version of the Library that is distributed under the
  * conditions defined in the GNU Lesser General Public License.
  */

 /*
  * Implementation notes:
  *
  * API specifies timeout for each operation (or zero for non-blocking).
  *
  * It is not possible to rely on the OS socket timeout as this will fail to
  * detect the command-response situation where data is sent successfully and
  * the other end chooses not to send a response (other than the TCP ack).
  *
  * Windows supports select() however native WSA events are used to:
  * - avoid problems with socket numbers above 1024.
  * - wait without allowing other events handlers to run (important for use
  *   with win7 WMC).
  */

 #include "hdhomerun.h"
 #include <windows.h>
 #include <iphlpapi.h>

 int hdhomerun_local_ip_info(struct hdhomerun_local_ip_info_t ip_info_list[], int max_count)
 {
 	PIP_ADAPTER_INFO AdapterInfo;
 	ULONG AdapterInfoLength = sizeof(IP_ADAPTER_INFO) * 16;

 	while (1) {
 		AdapterInfo = (IP_ADAPTER_INFO *)malloc(AdapterInfoLength);
 		if (!AdapterInfo) {
 			return -1;
 		}

 		ULONG LengthNeeded = AdapterInfoLength;
 		DWORD Ret = GetAdaptersInfo(AdapterInfo, &LengthNeeded);
 		if (Ret == NO_ERROR) {
 			break;
 		}

 		free(AdapterInfo);

 		if (Ret != ERROR_BUFFER_OVERFLOW) {
 			return -1;
 		}
 		if (AdapterInfoLength >= LengthNeeded) {
 			return -1;
 		}

 		AdapterInfoLength = LengthNeeded;
 	}

 	int count = 0;
 	PIP_ADAPTER_INFO Adapter = AdapterInfo;
 	while (Adapter) {
 		IP_ADDR_STRING *IPAddr = &Adapter->IpAddressList;
 		while (IPAddr) {
 			uint32_t ip_addr = ntohl(inet_addr(IPAddr->IpAddress.String));
 			uint32_t subnet_mask = ntohl(inet_addr(IPAddr->IpMask.String));

 			if (ip_addr == 0) {
 				IPAddr = IPAddr->Next;
 				continue;
 			}

 			struct hdhomerun_local_ip_info_t *ip_info = &ip_info_list[count++];
 			ip_info->ip_addr = ip_addr;
 			ip_info->subnet_mask = subnet_mask;

 			if (count >= max_count) {
 				break;
 			}

 			IPAddr = IPAddr->Next;
 		}

 		if (count >= max_count) {
 			break;
 		}

 		Adapter = Adapter->Next;
 	}

 	free(AdapterInfo);
 	return count;
 }

 hdhomerun_sock_t hdhomerun_sock_create_udp(void)
 {
 	/* Create socket. */
 	hdhomerun_sock_t sock = (hdhomerun_sock_t)socket(AF_INET, SOCK_DGRAM, 0);
 	if (sock == -1) {
 		return HDHOMERUN_SOCK_INVALID;
 	}

 	/* Set non-blocking */
 	unsigned long mode = 1;
 	if (ioctlsocket(sock, FIONBIO, &mode) != 0) {
 		closesocket(sock);
 		return HDHOMERUN_SOCK_INVALID;
 	}

 	/* Allow broadcast. */
 	int sock_opt = 1;
 	setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (char *)&sock_opt, sizeof(sock_opt));

 	/* Success. */
 	return sock;
 }

 hdhomerun_sock_t hdhomerun_sock_create_tcp(void)
 {
 	/* Create socket. */
 	hdhomerun_sock_t sock = (hdhomerun_sock_t)socket(AF_INET, SOCK_STREAM, 0);
 	if (sock == -1) {
 		return HDHOMERUN_SOCK_INVALID;
 	}

 	/* Set non-blocking */
 	unsigned long mode = 1;
 	if (ioctlsocket(sock, FIONBIO, &mode) != 0) {
 		closesocket(sock);
 		return HDHOMERUN_SOCK_INVALID;
 	}

 	/* Success. */
 	return sock;
 }

 void hdhomerun_sock_destroy(hdhomerun_sock_t sock)
 {
 	closesocket(sock);
 }

 int hdhomerun_sock_getlasterror(void)
 {
 	return WSAGetLastError();
 }

 uint32_t hdhomerun_sock_getsockname_addr(hdhomerun_sock_t sock)
 {
 	struct sockaddr_in sock_addr;
 	int sockaddr_size = sizeof(sock_addr);

 	if (getsockname(sock, (struct sockaddr *)&sock_addr, &sockaddr_size) != 0) {
 		return 0;
 	}

 	return ntohl(sock_addr.sin_addr.s_addr);
 }

 uint16_t hdhomerun_sock_getsockname_port(hdhomerun_sock_t sock)
 {
 	struct sockaddr_in sock_addr;
 	int sockaddr_size = sizeof(sock_addr);

 	if (getsockname(sock, (struct sockaddr *)&sock_addr, &sockaddr_size) != 0) {
 		return 0;
 	}

 	return ntohs(sock_addr.sin_port);
 }

 uint32_t hdhomerun_sock_getpeername_addr(hdhomerun_sock_t sock)
 {
 	struct sockaddr_in sock_addr;
 	int sockaddr_size = sizeof(sock_addr);

 	if (getpeername(sock, (struct sockaddr *)&sock_addr, &sockaddr_size) != 0) {
 		return 0;
 	}

 	return ntohl(sock_addr.sin_addr.s_addr);
 }

 uint32_t hdhomerun_sock_getaddrinfo_addr(hdhomerun_sock_t sock, const char *name)
 {
 	struct addrinfo hints;
 	memset(&hints, 0, sizeof(hints));
 	hints.ai_family = AF_INET;
 	hints.ai_socktype = SOCK_STREAM;
 	hints.ai_protocol = IPPROTO_TCP;

 	struct addrinfo *sock_info;
 	if (getaddrinfo(name, "", &hints, &sock_info) != 0) {
 		return 0;
 	}

 	struct sockaddr_in *sock_addr = (struct sockaddr_in *)sock_info->ai_addr;
 	uint32_t addr = ntohl(sock_addr->sin_addr.s_addr);

 	freeaddrinfo(sock_info);
 	return addr;
 }

 bool_t hdhomerun_sock_join_multicast_group(hdhomerun_sock_t sock, uint32_t multicast_ip, uint32_t local_ip)
 {
 	struct ip_mreq imr;
 	memset(&imr, 0, sizeof(imr));
 	imr.imr_multiaddr.s_addr  = htonl(multicast_ip);
 	imr.imr_interface.s_addr  = htonl(local_ip);

 	if (setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const char *)&imr, sizeof(imr)) != 0) {
 		return FALSE;
 	}

 	return TRUE;
 }

 bool_t hdhomerun_sock_leave_multicast_group(hdhomerun_sock_t sock, uint32_t multicast_ip, uint32_t local_ip)
 {
 	struct ip_mreq imr;
 	memset(&imr, 0, sizeof(imr));
 	imr.imr_multiaddr.s_addr  = htonl(multicast_ip);
 	imr.imr_interface.s_addr  = htonl(local_ip);

 	if (setsockopt(sock, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const char *)&imr, sizeof(imr)) != 0) {
 		return FALSE;
 	}

 	return TRUE;
 }

 bool_t hdhomerun_sock_bind(hdhomerun_sock_t sock, uint32_t local_addr, uint16_t local_port, bool_t allow_reuse)
 {
 	int sock_opt = allow_reuse;
 	setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&sock_opt, sizeof(sock_opt));

 	struct sockaddr_in sock_addr;
 	memset(&sock_addr, 0, sizeof(sock_addr));
 	sock_addr.sin_family = AF_INET;
 	sock_addr.sin_addr.s_addr = htonl(local_addr);
 	sock_addr.sin_port = htons(local_port);

 	if (bind(sock, (struct sockaddr *)&sock_addr, sizeof(sock_addr)) != 0) {
 		return FALSE;
 	}

 	return TRUE;
 }

 bool_t hdhomerun_sock_connect(hdhomerun_sock_t sock, uint32_t remote_addr, uint16_t remote_port, uint64_t timeout)
 {
 	WSAEVENT wsa_event = WSACreateEvent();
 	if (wsa_event == WSA_INVALID_EVENT) {
 		return FALSE;
 	}

 	if (WSAEventSelect(sock, wsa_event, FD_CONNECT) == SOCKET_ERROR) {
 		WSACloseEvent(wsa_event);
 		return FALSE;
 	}

 	/* Connect (non-blocking). */
 	struct sockaddr_in sock_addr;
 	memset(&sock_addr, 0, sizeof(sock_addr));
 	sock_addr.sin_family = AF_INET;
 	sock_addr.sin_addr.s_addr = htonl(remote_addr);
 	sock_addr.sin_port = htons(remote_port);

 	if (connect(sock, (struct sockaddr *)&sock_addr, sizeof(sock_addr)) != 0) {
 		if (WSAGetLastError() != WSAEWOULDBLOCK) {
 			WSACloseEvent(wsa_event);
 			return FALSE;
 		}
 	}

 	/* Wait for connect to complete (both success and failure will signal). */
 	DWORD ret = WaitForSingleObjectEx(wsa_event, (DWORD)timeout, FALSE);
 	WSACloseEvent(wsa_event);

 	if (ret != WAIT_OBJECT_0) {
 		return FALSE;
 	}

 	/* Detect success/failure. */
 	int sockaddr_size = sizeof(sock_addr);
 	if (getpeername(sock, (struct sockaddr *)&sock_addr, &sockaddr_size) != 0) {
 		return FALSE;
 	}

 	return TRUE;
 }

 static bool_t hdhomerun_sock_wait_for_event(hdhomerun_sock_t sock, long event_type, uint64_t stop_time)
 {
 	uint64_t current_time = getcurrenttime();
 	if (current_time >= stop_time) {
 		return FALSE;
 	}

 	WSAEVENT wsa_event = WSACreateEvent();
 	if (wsa_event == WSA_INVALID_EVENT) {
 		return FALSE;
 	}

 	if (WSAEventSelect(sock, wsa_event, event_type) == SOCKET_ERROR) {
 		WSACloseEvent(wsa_event);
 		return FALSE;
 	}

 	DWORD ret = WaitForSingleObjectEx(wsa_event, (DWORD)(stop_time - current_time), FALSE);
 	WSACloseEvent(wsa_event);

 	if (ret != WAIT_OBJECT_0) {
 		return FALSE;
 	}

 	return TRUE;
 }

 bool_t hdhomerun_sock_send(hdhomerun_sock_t sock, const void *data, size_t length, uint64_t timeout)
 {
 	uint64_t stop_time = getcurrenttime() + timeout;
 	const uint8_t *ptr = (uint8_t *)data;

 	while (1) {
 		int ret = send(sock, (char *)ptr, (int)length, 0);
 		if (ret >= (int)length) {
 			return TRUE;
 		}

 		if (ret > 0) {
 			ptr += ret;
 			length -= ret;
 		}

 		if (WSAGetLastError() != WSAEWOULDBLOCK) {
 			return FALSE;
 		}

 		if (!hdhomerun_sock_wait_for_event(sock, FD_WRITE | FD_CLOSE, stop_time)) {
 			return FALSE;
 		}
 	}
 }

 bool_t hdhomerun_sock_sendto(hdhomerun_sock_t sock, uint32_t remote_addr, uint16_t remote_port, const void *data, size_t length, uint64_t timeout)
 {
 	uint64_t stop_time = getcurrenttime() + timeout;
 	const uint8_t *ptr = (uint8_t *)data;

 	while (1) {
 		struct sockaddr_in sock_addr;
 		memset(&sock_addr, 0, sizeof(sock_addr));
 		sock_addr.sin_family = AF_INET;
 		sock_addr.sin_addr.s_addr = htonl(remote_addr);
 		sock_addr.sin_port = htons(remote_port);

 		int ret = sendto(sock, (char *)ptr, (int)length, 0, (struct sockaddr *)&sock_addr, sizeof(sock_addr));
 		if (ret >= (int)length) {
 			return TRUE;
 		}

 		if (ret > 0) {
 			ptr += ret;
 			length -= ret;
 		}

 		if (WSAGetLastError() != WSAEWOULDBLOCK) {
 			return FALSE;
 		}

 		if (!hdhomerun_sock_wait_for_event(sock, FD_WRITE | FD_CLOSE, stop_time)) {
 			return FALSE;
 		}
 	}
 }

 bool_t hdhomerun_sock_recv(hdhomerun_sock_t sock, void *data, size_t *length, uint64_t timeout)
 {
 	uint64_t stop_time = getcurrenttime() + timeout;

 	while (1) {
 		int ret = recv(sock, (char *)data, (int)(*length), 0);
 		if (ret > 0) {
 			*length = ret;
 			return TRUE;
 		}

 		if (WSAGetLastError() != WSAEWOULDBLOCK) {
 			return FALSE;
 		}

 		if (!hdhomerun_sock_wait_for_event(sock, FD_READ | FD_CLOSE, stop_time)) {
 			return FALSE;
 		}
 	}
 }

 bool_t hdhomerun_sock_recvfrom(hdhomerun_sock_t sock, uint32_t *remote_addr, uint16_t *remote_port, void *data, size_t *length, uint64_t timeout)
 {
 	uint64_t stop_time = getcurrenttime() + timeout;

 	while (1) {
 		struct sockaddr_in sock_addr;
 		memset(&sock_addr, 0, sizeof(sock_addr));
 		int sockaddr_size = sizeof(sock_addr);

 		int ret = recvfrom(sock, (char *)data, (int)(*length), 0, (struct sockaddr *)&sock_addr, &sockaddr_size);
 		if (ret > 0) {
 			*remote_addr = ntohl(sock_addr.sin_addr.s_addr);
 			*remote_port = ntohs(sock_addr.sin_port);
 			*length = ret;
 			return TRUE;
 		}

 		if (WSAGetLastError() != WSAEWOULDBLOCK) {
 			return FALSE;
 		}

 		if (!hdhomerun_sock_wait_for_event(sock, FD_READ | FD_CLOSE, stop_time)) {
 			return FALSE;
 		}
 	}
 }
	/*
	* hdhomerun_sock_windows.c
	*
	* Copyright © 2010 Silicondust USA Inc. <www.silicondust.com>.
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 3 of the License, or (at your option) any later version.
	*
	* This library is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with this library. If not, see <http://www.gnu.org/licenses/>.
	*
	* As a special exception to the GNU Lesser General Public License,
	* you may link, statically or dynamically, an application with a
	* publicly distributed version of the Library to produce an
	* executable file containing portions of the Library, and
	* distribute that executable file under terms of your choice,
	* without any of the additional requirements listed in clause 4 of
	* the GNU Lesser General Public License.
	*
	* By "a publicly distributed version of the Library", we mean
	* either the unmodified Library as distributed by Silicondust, or a
	* modified version of the Library that is distributed under the
	* conditions defined in the GNU Lesser General Public License.
	*/

	/*
	* Implementation notes:
	*
	* API specifies timeout for each operation (or zero for non-blocking).
	*
	* It is not possible to rely on the OS socket timeout as this will fail to
	* detect the command-response situation where data is sent successfully and
	* the other end chooses not to send a response (other than the TCP ack).
	*
	* Windows supports select() however native WSA events are used to:
	* - avoid problems with socket numbers above 1024.
	* - wait without allowing other events handlers to run (important for use
	* with win7 WMC).
	*/

	#include "hdhomerun.h"
	#include <windows.h>
	#include <iphlpapi.h>

	int hdhomerun_local_ip_info(struct hdhomerun_local_ip_info_t ip_info_list[], int max_count)
	{
	PIP_ADAPTER_INFO AdapterInfo;
	ULONG AdapterInfoLength = sizeof(IP_ADAPTER_INFO) * 16;

	while (1) {
	AdapterInfo = (IP_ADAPTER_INFO *)malloc(AdapterInfoLength);
	if (!AdapterInfo) {
	return -1;
	}

	ULONG LengthNeeded = AdapterInfoLength;
	DWORD Ret = GetAdaptersInfo(AdapterInfo, &LengthNeeded);
	if (Ret == NO_ERROR) {
	break;
	}

	free(AdapterInfo);

	if (Ret != ERROR_BUFFER_OVERFLOW) {
	return -1;
	}
	if (AdapterInfoLength >= LengthNeeded) {
	return -1;
	}

	AdapterInfoLength = LengthNeeded;
	}

	int count = 0;
	PIP_ADAPTER_INFO Adapter = AdapterInfo;
	while (Adapter) {
	IP_ADDR_STRING *IPAddr = &Adapter->IpAddressList;
	while (IPAddr) {
	uint32_t ip_addr = ntohl(inet_addr(IPAddr->IpAddress.String));
	uint32_t subnet_mask = ntohl(inet_addr(IPAddr->IpMask.String));

	if (ip_addr == 0) {
	IPAddr = IPAddr->Next;
	continue;
	}

	struct hdhomerun_local_ip_info_t *ip_info = &ip_info_list[count++];
	ip_info->ip_addr = ip_addr;
	ip_info->subnet_mask = subnet_mask;

	if (count >= max_count) {
	break;
	}

	IPAddr = IPAddr->Next;
	}

	if (count >= max_count) {
	break;
	}

	Adapter = Adapter->Next;
	}

	free(AdapterInfo);
	return count;
	}

	hdhomerun_sock_t hdhomerun_sock_create_udp(void)
	{
	/* Create socket. */
	hdhomerun_sock_t sock = (hdhomerun_sock_t)socket(AF_INET, SOCK_DGRAM, 0);
	if (sock == -1) {
	return HDHOMERUN_SOCK_INVALID;
	}

	/* Set non-blocking */
	unsigned long mode = 1;
	if (ioctlsocket(sock, FIONBIO, &mode) != 0) {
	closesocket(sock);
	return HDHOMERUN_SOCK_INVALID;
	}

	/* Allow broadcast. */
	int sock_opt = 1;
	setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (char *)&sock_opt, sizeof(sock_opt));

	/* Success. */
	return sock;
	}

	hdhomerun_sock_t hdhomerun_sock_create_tcp(void)
	{
	/* Create socket. */
	hdhomerun_sock_t sock = (hdhomerun_sock_t)socket(AF_INET, SOCK_STREAM, 0);
	if (sock == -1) {
	return HDHOMERUN_SOCK_INVALID;
	}

	/* Set non-blocking */
	unsigned long mode = 1;
	if (ioctlsocket(sock, FIONBIO, &mode) != 0) {
	closesocket(sock);
	return HDHOMERUN_SOCK_INVALID;
	}

	/* Success. */
	return sock;
	}

	void hdhomerun_sock_destroy(hdhomerun_sock_t sock)
	{
	closesocket(sock);
	}

	int hdhomerun_sock_getlasterror(void)
	{
	return WSAGetLastError();
	}

	uint32_t hdhomerun_sock_getsockname_addr(hdhomerun_sock_t sock)
	{
	struct sockaddr_in sock_addr;
	int sockaddr_size = sizeof(sock_addr);

	if (getsockname(sock, (struct sockaddr *)&sock_addr, &sockaddr_size) != 0) {
	return 0;
	}

	return ntohl(sock_addr.sin_addr.s_addr);
	}

	uint16_t hdhomerun_sock_getsockname_port(hdhomerun_sock_t sock)
	{
	struct sockaddr_in sock_addr;
	int sockaddr_size = sizeof(sock_addr);

	if (getsockname(sock, (struct sockaddr *)&sock_addr, &sockaddr_size) != 0) {
	return 0;
	}

	return ntohs(sock_addr.sin_port);
	}

	uint32_t hdhomerun_sock_getpeername_addr(hdhomerun_sock_t sock)
	{
	struct sockaddr_in sock_addr;
	int sockaddr_size = sizeof(sock_addr);

	if (getpeername(sock, (struct sockaddr *)&sock_addr, &sockaddr_size) != 0) {
	return 0;
	}

	return ntohl(sock_addr.sin_addr.s_addr);
	}

	uint32_t hdhomerun_sock_getaddrinfo_addr(hdhomerun_sock_t sock, const char *name)
	{
	struct addrinfo hints;
	memset(&hints, 0, sizeof(hints));
	hints.ai_family = AF_INET;
	hints.ai_socktype = SOCK_STREAM;
	hints.ai_protocol = IPPROTO_TCP;

	struct addrinfo *sock_info;
	if (getaddrinfo(name, "", &hints, &sock_info) != 0) {
	return 0;
	}

	struct sockaddr_in sock_addr = (struct sockaddr_in )sock_info->ai_addr;
	uint32_t addr = ntohl(sock_addr->sin_addr.s_addr);

	freeaddrinfo(sock_info);
	return addr;
	}

	bool_t hdhomerun_sock_join_multicast_group(hdhomerun_sock_t sock, uint32_t multicast_ip, uint32_t local_ip)
	{
	struct ip_mreq imr;
	memset(&imr, 0, sizeof(imr));
	imr.imr_multiaddr.s_addr = htonl(multicast_ip);
	imr.imr_interface.s_addr = htonl(local_ip);

	if (setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const char *)&imr, sizeof(imr)) != 0) {
	return FALSE;
	}

	return TRUE;
	}

	bool_t hdhomerun_sock_leave_multicast_group(hdhomerun_sock_t sock, uint32_t multicast_ip, uint32_t local_ip)
	{
	struct ip_mreq imr;
	memset(&imr, 0, sizeof(imr));
	imr.imr_multiaddr.s_addr = htonl(multicast_ip);
	imr.imr_interface.s_addr = htonl(local_ip);

	if (setsockopt(sock, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const char *)&imr, sizeof(imr)) != 0) {
	return FALSE;
	}

	return TRUE;
	}

	bool_t hdhomerun_sock_bind(hdhomerun_sock_t sock, uint32_t local_addr, uint16_t local_port, bool_t allow_reuse)
	{
	int sock_opt = allow_reuse;
	setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&sock_opt, sizeof(sock_opt));

	struct sockaddr_in sock_addr;
	memset(&sock_addr, 0, sizeof(sock_addr));
	sock_addr.sin_family = AF_INET;
	sock_addr.sin_addr.s_addr = htonl(local_addr);
	sock_addr.sin_port = htons(local_port);

	if (bind(sock, (struct sockaddr *)&sock_addr, sizeof(sock_addr)) != 0) {
	return FALSE;
	}

	return TRUE;
	}

	bool_t hdhomerun_sock_connect(hdhomerun_sock_t sock, uint32_t remote_addr, uint16_t remote_port, uint64_t timeout)
	{
	WSAEVENT wsa_event = WSACreateEvent();
	if (wsa_event == WSA_INVALID_EVENT) {
	return FALSE;
	}

	if (WSAEventSelect(sock, wsa_event, FD_CONNECT) == SOCKET_ERROR) {
	WSACloseEvent(wsa_event);
	return FALSE;
	}

	/* Connect (non-blocking). */
	struct sockaddr_in sock_addr;
	memset(&sock_addr, 0, sizeof(sock_addr));
	sock_addr.sin_family = AF_INET;
	sock_addr.sin_addr.s_addr = htonl(remote_addr);
	sock_addr.sin_port = htons(remote_port);

	if (connect(sock, (struct sockaddr *)&sock_addr, sizeof(sock_addr)) != 0) {
	if (WSAGetLastError() != WSAEWOULDBLOCK) {
	WSACloseEvent(wsa_event);
	return FALSE;
	}
	}

	/* Wait for connect to complete (both success and failure will signal). */
	DWORD ret = WaitForSingleObjectEx(wsa_event, (DWORD)timeout, FALSE);
	WSACloseEvent(wsa_event);

	if (ret != WAIT_OBJECT_0) {
	return FALSE;
	}

	/* Detect success/failure. */
	int sockaddr_size = sizeof(sock_addr);
	if (getpeername(sock, (struct sockaddr *)&sock_addr, &sockaddr_size) != 0) {
	return FALSE;
	}

	return TRUE;
	}

	static bool_t hdhomerun_sock_wait_for_event(hdhomerun_sock_t sock, long event_type, uint64_t stop_time)
	{
	uint64_t current_time = getcurrenttime();
	if (current_time >= stop_time) {
	return FALSE;
	}

	WSAEVENT wsa_event = WSACreateEvent();
	if (wsa_event == WSA_INVALID_EVENT) {
	return FALSE;
	}

	if (WSAEventSelect(sock, wsa_event, event_type) == SOCKET_ERROR) {
	WSACloseEvent(wsa_event);
	return FALSE;
	}

	DWORD ret = WaitForSingleObjectEx(wsa_event, (DWORD)(stop_time - current_time), FALSE);
	WSACloseEvent(wsa_event);

	if (ret != WAIT_OBJECT_0) {
	return FALSE;
	}

	return TRUE;
	}

	bool_t hdhomerun_sock_send(hdhomerun_sock_t sock, const void *data, size_t length, uint64_t timeout)
	{
	uint64_t stop_time = getcurrenttime() + timeout;
	const uint8_t ptr = (uint8_t )data;

	while (1) {
	int ret = send(sock, (char *)ptr, (int)length, 0);
	if (ret >= (int)length) {
	return TRUE;
	}

	if (ret > 0) {
	ptr += ret;
	length -= ret;
	}

	if (WSAGetLastError() != WSAEWOULDBLOCK) {
	return FALSE;
	}

	if (!hdhomerun_sock_wait_for_event(sock, FD_WRITE \| FD_CLOSE, stop_time)) {
	return FALSE;
	}
	}
	}

	bool_t hdhomerun_sock_sendto(hdhomerun_sock_t sock, uint32_t remote_addr, uint16_t remote_port, const void *data, size_t length, uint64_t timeout)
	{
	uint64_t stop_time = getcurrenttime() + timeout;
	const uint8_t ptr = (uint8_t )data;

	while (1) {
	struct sockaddr_in sock_addr;
	memset(&sock_addr, 0, sizeof(sock_addr));
	sock_addr.sin_family = AF_INET;
	sock_addr.sin_addr.s_addr = htonl(remote_addr);
	sock_addr.sin_port = htons(remote_port);

	int ret = sendto(sock, (char )ptr, (int)length, 0, (struct sockaddr )&sock_addr, sizeof(sock_addr));
	if (ret >= (int)length) {
	return TRUE;
	}

	if (ret > 0) {
	ptr += ret;
	length -= ret;
	}

	if (WSAGetLastError() != WSAEWOULDBLOCK) {
	return FALSE;
	}

	if (!hdhomerun_sock_wait_for_event(sock, FD_WRITE \| FD_CLOSE, stop_time)) {
	return FALSE;
	}
	}
	}

	bool_t hdhomerun_sock_recv(hdhomerun_sock_t sock, void data, size_t length, uint64_t timeout)
	{
	uint64_t stop_time = getcurrenttime() + timeout;

	while (1) {
	int ret = recv(sock, (char )data, (int)(length), 0);
	if (ret > 0) {
	*length = ret;
	return TRUE;
	}

	if (WSAGetLastError() != WSAEWOULDBLOCK) {
	return FALSE;
	}

	if (!hdhomerun_sock_wait_for_event(sock, FD_READ \| FD_CLOSE, stop_time)) {
	return FALSE;
	}
	}
	}

	bool_t hdhomerun_sock_recvfrom(hdhomerun_sock_t sock, uint32_t remote_addr, uint16_t remote_port, void data, size_t length, uint64_t timeout)
	{
	uint64_t stop_time = getcurrenttime() + timeout;

	while (1) {
	struct sockaddr_in sock_addr;
	memset(&sock_addr, 0, sizeof(sock_addr));
	int sockaddr_size = sizeof(sock_addr);

	int ret = recvfrom(sock, (char )data, (int)(length), 0, (struct sockaddr *)&sock_addr, &sockaddr_size);
	if (ret > 0) {
	*remote_addr = ntohl(sock_addr.sin_addr.s_addr);
	*remote_port = ntohs(sock_addr.sin_port);
	*length = ret;
	return TRUE;
	}

	if (WSAGetLastError() != WSAEWOULDBLOCK) {
	return FALSE;
	}

	if (!hdhomerun_sock_wait_for_event(sock, FD_READ \| FD_CLOSE, stop_time)) {
	return FALSE;
	}
	}
	}