summaryrefslogtreecommitdiffstats
path: root/src/osd/modules/file/winsocket.cpp
blob: d04538963ead0baefe8a8b30602928394a0640c3 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
// license:BSD-3-Clause
// copyright-holders:Aaron Giles, Vas Crabb
//============================================================
//
//  winsocket.c - Windows socket (inet) access functions
//
//============================================================

#include "winfile.h"

// MAMEOS headers
#include "winutil.h"

// MAME headers
#include "osdcore.h"

#include <cassert>
#include <cstdio>
#include <cstring>

// standard windows headers
#include <windows.h>
#include <winioctl.h>
#include <tchar.h>
#include <cstdlib>
#include <cctype>


namespace {

char const *const winfile_socket_identifier  = "socket.";


class win_osd_socket : public osd_file
{
public:
	win_osd_socket(win_osd_socket const &) = delete;
	win_osd_socket(win_osd_socket &&) = delete;
	win_osd_socket& operator=(win_osd_socket const &) = delete;
	win_osd_socket& operator=(win_osd_socket &&) = delete;

	win_osd_socket(SOCKET s, bool l) noexcept
		: m_socket(s)
		, m_listening(l)
	{
		assert(INVALID_SOCKET != m_socket);
	}

	virtual ~win_osd_socket() override
	{
		closesocket(m_socket);
	}

	virtual std::error_condition read(void *buffer, std::uint64_t offset, std::uint32_t length, std::uint32_t &actual) noexcept override
	{
		fd_set readfds;
		FD_ZERO(&readfds);
		FD_SET(m_socket, &readfds);

		struct timeval timeout;
		timeout.tv_sec = timeout.tv_usec = 0;

		if (select(m_socket + 1, &readfds, nullptr, nullptr, &timeout) < 0)
		{
			return wsa_error_to_file_error(WSAGetLastError());
		}
		else if (FD_ISSET(m_socket, &readfds))
		{
			if (!m_listening)
			{
				// connected socket
				int const result = recv(m_socket, (char*)buffer, length, 0);
				if (result < 0)
				{
					return wsa_error_to_file_error(WSAGetLastError());
				}
				else
				{
					actual = result;
					return std::error_condition();
				}
			}
			else
			{
				// listening socket
				SOCKET const accepted = accept(m_socket, nullptr, nullptr);
				if (INVALID_SOCKET == accepted)
				{
					return wsa_error_to_file_error(WSAGetLastError());
				}
				else
				{
					closesocket(m_socket);
					m_socket = accepted;
					m_listening = false;
					actual = 0;

					return std::error_condition();
				}
			}
		}
		else
		{
			// no data available
			actual = 0;
			return std::errc::operation_would_block;
		}
	}

	virtual std::error_condition write(void const *buffer, std::uint64_t offset, std::uint32_t length, std::uint32_t &actual) noexcept override
	{
		auto const result = send(m_socket, reinterpret_cast<const char *>(buffer), length, 0);
		if (result < 0)
			return wsa_error_to_file_error(WSAGetLastError());

		actual = result;
		return std::error_condition();
	}

	virtual std::error_condition truncate(std::uint64_t offset) noexcept override
	{
		// doesn't make sense for a socket
		return std::errc::bad_file_descriptor;
	}

	virtual std::error_condition flush() noexcept override
	{
		// no buffers to flush
		return std::error_condition();
	}

	static std::error_condition wsa_error_to_file_error(int err)
	{
		// TODO: determine if there's a better way to do this
		switch (err)
		{
		case 0:                     return std::error_condition();
		case WSA_NOT_ENOUGH_MEMORY: return std::errc::not_enough_memory;
		case WSA_INVALID_PARAMETER: return std::errc::invalid_argument;
		case WSAEINTR:              return std::errc::interrupted;
		case WSAEBADF:              return std::errc::bad_file_descriptor;
		case WSAEACCES:             return std::errc::permission_denied;
		case WSAEFAULT:             return std::errc::bad_address;
		case WSAEINVAL:             return std::errc::invalid_argument;
		case WSAEMFILE:             return std::errc::too_many_files_open;
		case WSAENETRESET:          return std::errc::network_reset;
		case WSAECONNABORTED:       return std::errc::connection_aborted;
		case WSAEWOULDBLOCK:        return std::errc::operation_would_block;
		case WSAEINPROGRESS:        return std::errc::operation_in_progress;
		case WSAEALREADY:           return std::errc::connection_already_in_progress;
		case WSAENOTSOCK:           return std::errc::not_a_socket;
		case WSAEDESTADDRREQ:       return std::errc::destination_address_required;
		case WSAEMSGSIZE:           return std::errc::message_size;
		case WSAEPROTOTYPE:         return std::errc::wrong_protocol_type;
		case WSAENOPROTOOPT:        return std::errc::no_protocol_option;
		case WSAEPROTONOSUPPORT:    return std::errc::protocol_not_supported;
		case WSAEOPNOTSUPP:         return std::errc::operation_not_supported;
		case WSAEAFNOSUPPORT:       return std::errc::address_family_not_supported;
		case WSAEADDRINUSE:         return std::errc::address_in_use;
		case WSAEADDRNOTAVAIL:      return std::errc::address_not_available;
		case WSAENETDOWN:           return std::errc::network_down;
		case WSAENETUNREACH:        return std::errc::network_unreachable;
		case WSAECONNRESET:         return std::errc::connection_reset;
		case WSAENOBUFS:            return std::errc::no_buffer_space;
		case WSAEISCONN:            return std::errc::already_connected;
		case WSAENOTCONN:           return std::errc::not_connected;
		case WSAETIMEDOUT:          return std::errc::timed_out;
		case WSAECONNREFUSED:       return std::errc::connection_refused;
		case WSAEHOSTUNREACH:       return std::errc::host_unreachable;
		case WSAECANCELLED:         return std::errc::operation_canceled;

		// TODO: better default error code?
		default:                    return std::errc::io_error;
		}
	}

private:
	SOCKET  m_socket;
	bool    m_listening;
};

} // anonymous namespace


bool win_init_sockets() noexcept
{
	WSADATA wsaData;
	WORD const version = MAKEWORD(2, 0);
	int const error = WSAStartup(version, &wsaData);

	// check for error
	if (error)
	{
		// error occurred
		return false;
	}

	// check for correct version
	if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion ) != 0)
	{
		// incorrect WinSock version
		WSACleanup();
		return false;
	}

	// WinSock has been initialized
	return true;
}


void win_cleanup_sockets() noexcept
{
	WSACleanup();
}


bool win_check_socket_path(std::string const &path) noexcept
{
	if (strncmp(path.c_str(), winfile_socket_identifier, strlen(winfile_socket_identifier)) == 0 &&
		strchr(path.c_str(), ':') != nullptr) return true;
	return false;
}


std::error_condition win_open_socket(std::string const &path, std::uint32_t openflags, osd_file::ptr &file, std::uint64_t &filesize) noexcept
{
	char hostname[256];
	int port;
	std::sscanf(&path[strlen(winfile_socket_identifier)], "%255[^:]:%d", hostname, &port);

	struct hostent const *const localhost = gethostbyname(hostname);
	if (!localhost)
		return std::errc::no_such_file_or_directory;

	struct sockaddr_in sai;
	memset(&sai, 0, sizeof(sai));
	sai.sin_family = AF_INET;
	sai.sin_port = htons(port);
	sai.sin_addr = *reinterpret_cast<struct in_addr *>(localhost->h_addr);

	SOCKET sock = socket(AF_INET, SOCK_STREAM, 0);
	if (INVALID_SOCKET == sock)
		return win_osd_socket::wsa_error_to_file_error(WSAGetLastError());

	int const flag = 1;
	if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, reinterpret_cast<const char *>(&flag), sizeof(flag)) == SOCKET_ERROR)
	{
		int const err = WSAGetLastError();
		closesocket(sock);
		return win_osd_socket::wsa_error_to_file_error(err);
	}

	// listening socket support
	osd_file::ptr result;
	if (openflags & OPEN_FLAG_CREATE)
	{
		//printf("Listening for client at '%s' on port '%d'\n", hostname, port);
		// bind socket...
		if (bind(sock, reinterpret_cast<struct sockaddr const *>(&sai), sizeof(sai)) == SOCKET_ERROR)
		{
			int const err = WSAGetLastError();
			closesocket(sock);
			return win_osd_socket::wsa_error_to_file_error(err);
		}

		// start to listen...
		if (listen(sock, 1) == SOCKET_ERROR)
		{
			int const err = WSAGetLastError();
			closesocket(sock);
			return win_osd_socket::wsa_error_to_file_error(err);
		}

		// mark socket as "listening"
		result.reset(new (std::nothrow) win_osd_socket(sock, true));
	}
	else
	{
		//printf("Connecting to server '%s' on port '%d'\n", hostname, port);
		if (connect(sock, reinterpret_cast<struct sockaddr const *>(&sai), sizeof(sai)) == SOCKET_ERROR)
		{
			int const err = WSAGetLastError();
			closesocket(sock);
			return win_osd_socket::wsa_error_to_file_error(err);
		}
		result.reset(new (std::nothrow) win_osd_socket(sock, false));
	}

	if (!result)
	{
		closesocket(sock);
		return std::errc::not_enough_memory;
	}
	file = std::move(result);
	filesize = 0;
	return std::error_condition();
}