3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 #ifndef WIN32_LEAN_AND_MEAN
24 #define WIN32_LEAN_AND_MEAN
26 // Without this some of the network functions are not found on mingw
28 #define _WIN32_WINNT 0x0501
34 #pragma comment(lib, "ws2_32.lib")
36 typedef SOCKET socket_t;
37 typedef int socklen_t;
39 #include <sys/types.h>
40 #include <sys/socket.h>
41 #include <netinet/in.h>
45 #include <arpa/inet.h>
49 #include "constants.h"
52 #include "main.h" // for g_settings
60 #include "util/string.h"
61 #include "util/numeric.h"
63 // Set to true to enable verbose debug output
64 bool socket_enable_debug_output = false;
66 bool g_sockets_initialized = false;
72 // Windows needs sockets to be initialized before use
74 if(WSAStartup( MAKEWORD(2,2), &WsaData ) != NO_ERROR)
75 throw SocketException("WSAStartup failed");
77 g_sockets_initialized = true;
80 void sockets_cleanup()
83 // On Windows, cleanup sockets after use
95 memset(&m_address, 0, sizeof(m_address));
99 Address::Address(u32 address, u16 port)
101 memset(&m_address, 0, sizeof(m_address));
106 Address::Address(u8 a, u8 b, u8 c, u8 d, u16 port)
108 memset(&m_address, 0, sizeof(m_address));
109 setAddress(a, b, c, d);
113 Address::Address(const IPv6AddressBytes * ipv6_bytes, u16 port)
115 memset(&m_address, 0, sizeof(m_address));
116 setAddress(ipv6_bytes);
120 // Equality (address family, address and port must be equal)
121 bool Address::operator==(Address &address)
123 if(address.m_addr_family != m_addr_family || address.m_port != m_port)
125 else if(m_addr_family == AF_INET)
127 return m_address.ipv4.sin_addr.s_addr ==
128 address.m_address.ipv4.sin_addr.s_addr;
130 else if(m_addr_family == AF_INET6)
132 return memcmp(m_address.ipv6.sin6_addr.s6_addr,
133 address.m_address.ipv6.sin6_addr.s6_addr, 16) == 0;
139 bool Address::operator!=(Address &address)
141 return !(*this == address);
144 void Address::Resolve(const char *name)
146 struct addrinfo *resolved, hints;
147 memset(&hints, 0, sizeof(hints));
150 hints.ai_socktype = 0;
151 hints.ai_protocol = 0;
153 if(g_settings->getBool("enable_ipv6"))
155 // AF_UNSPEC allows both IPv6 and IPv4 addresses to be returned
156 hints.ai_family = AF_UNSPEC;
160 hints.ai_family = AF_INET;
164 int e = getaddrinfo(name, NULL, &hints, &resolved);
166 throw ResolveError(gai_strerror(e));
169 if(resolved->ai_family == AF_INET)
171 struct sockaddr_in *t = (struct sockaddr_in *) resolved->ai_addr;
172 m_addr_family = AF_INET;
175 else if(resolved->ai_family == AF_INET6)
177 struct sockaddr_in6 *t = (struct sockaddr_in6 *) resolved->ai_addr;
178 m_addr_family = AF_INET6;
183 freeaddrinfo(resolved);
184 throw ResolveError("");
186 freeaddrinfo(resolved);
189 // IP address -> textual representation
190 std::string Address::serializeString() const
192 // windows XP doesnt have inet_ntop, maybe use better func
194 if(m_addr_family == AF_INET)
197 addr = ntohl(m_address.ipv4.sin_addr.s_addr);
198 a = (addr & 0xFF000000) >> 24;
199 b = (addr & 0x00FF0000) >> 16;
200 c = (addr & 0x0000FF00) >> 8;
201 d = (addr & 0x000000FF);
202 return itos(a) + "." + itos(b) + "." + itos(c) + "." + itos(d);
204 else if(m_addr_family == AF_INET6)
206 std::ostringstream os;
207 for(int i = 0; i < 16; i += 2)
210 (m_address.ipv6.sin6_addr.s6_addr[i] << 8) |
211 (m_address.ipv6.sin6_addr.s6_addr[i + 1]);
212 os << std::hex << section;
219 return std::string("");
221 char str[INET6_ADDRSTRLEN];
222 if (inet_ntop(m_addr_family, (m_addr_family == AF_INET) ? (void*)&(m_address.ipv4.sin_addr) : (void*)&(m_address.ipv6.sin6_addr), str, INET6_ADDRSTRLEN) == NULL) {
223 return std::string("");
225 return std::string(str);
229 struct sockaddr_in Address::getAddress() const
231 return m_address.ipv4; // NOTE: NO PORT INCLUDED, use getPort()
234 struct sockaddr_in6 Address::getAddress6() const
236 return m_address.ipv6; // NOTE: NO PORT INCLUDED, use getPort()
239 u16 Address::getPort() const
244 int Address::getFamily() const
246 return m_addr_family;
249 bool Address::isIPv6() const
251 return m_addr_family == AF_INET6;
254 void Address::setAddress(u32 address)
256 m_addr_family = AF_INET;
257 m_address.ipv4.sin_family = AF_INET;
258 m_address.ipv4.sin_addr.s_addr = htonl(address);
261 void Address::setAddress(u8 a, u8 b, u8 c, u8 d)
263 m_addr_family = AF_INET;
264 m_address.ipv4.sin_family = AF_INET;
265 u32 addr = htonl((a << 24) | (b << 16) | (c << 8) | d);
266 m_address.ipv4.sin_addr.s_addr = addr;
269 void Address::setAddress(const IPv6AddressBytes * ipv6_bytes)
271 m_addr_family = AF_INET6;
272 m_address.ipv6.sin6_family = AF_INET6;
274 memcpy(m_address.ipv6.sin6_addr.s6_addr, ipv6_bytes->bytes, 16);
276 memset(m_address.ipv6.sin6_addr.s6_addr, 0, 16);
279 void Address::setPort(u16 port)
284 void Address::print(std::ostream *s) const
286 if(m_addr_family == AF_INET6)
288 (*s) << "[" << serializeString() << "]:" << m_port;
292 (*s) << serializeString() << ":" << m_port;
300 UDPSocket::UDPSocket(bool ipv6)
302 if(g_sockets_initialized == false)
303 throw SocketException("Sockets not initialized");
305 // Use IPv6 if specified
306 m_addr_family = ipv6 ? AF_INET6 : AF_INET;
307 m_handle = socket(m_addr_family, SOCK_DGRAM, IPPROTO_UDP);
309 if(socket_enable_debug_output)
311 dstream << "UDPSocket(" << (int) m_handle
312 << ")::UDPSocket(): ipv6 = "
313 << (ipv6 ? "true" : "false")
319 throw SocketException("Failed to create socket");
325 UDPSocket::~UDPSocket()
327 if(socket_enable_debug_output)
329 dstream << "UDPSocket( " << (int) m_handle << ")::~UDPSocket()"
334 closesocket(m_handle);
340 void UDPSocket::Bind(Address addr)
342 if(socket_enable_debug_output)
344 dstream << "UDPSocket(" << (int) m_handle << ")::Bind(): "
345 << addr.serializeString() << ":"
346 << addr.getPort() << std::endl;
349 if (addr.getFamily() != m_addr_family)
351 char errmsg[] = "Socket and bind address families do not match";
352 errorstream << "Bind failed: " << errmsg << std::endl;
353 throw SocketException(errmsg);
356 if(m_addr_family == AF_INET6)
358 struct sockaddr_in6 address;
359 memset(&address, 0, sizeof(address));
361 address = addr.getAddress6();
362 address.sin6_family = AF_INET6;
363 address.sin6_port = htons(addr.getPort());
365 if(bind(m_handle, (const struct sockaddr *) &address,
366 sizeof(struct sockaddr_in6)) < 0)
368 dstream << (int) m_handle << ": Bind failed: "
369 << strerror(errno) << std::endl;
370 throw SocketException("Failed to bind socket");
375 struct sockaddr_in address;
376 memset(&address, 0, sizeof(address));
378 address = addr.getAddress();
379 address.sin_family = AF_INET;
380 address.sin_port = htons(addr.getPort());
382 if(bind(m_handle, (const struct sockaddr *) &address,
383 sizeof(struct sockaddr_in)) < 0)
385 dstream << (int) m_handle << ": Bind failed: "
386 << strerror(errno) << std::endl;
387 throw SocketException("Failed to bind socket");
392 void UDPSocket::Send(const Address & destination, const void * data, int size)
394 bool dumping_packet = false; // for INTERNET_SIMULATOR
396 if(INTERNET_SIMULATOR)
397 dumping_packet = (myrand() % INTERNET_SIMULATOR_PACKET_LOSS == 0);
399 if(socket_enable_debug_output)
401 // Print packet destination and size
402 dstream << (int) m_handle << " -> ";
403 destination.print(&dstream);
404 dstream << ", size=" << size;
406 // Print packet contents
407 dstream << ", data=";
408 for(int i = 0; i < size && i < 20; i++)
412 unsigned int a = ((const unsigned char *) data)[i];
413 dstream << std::hex << std::setw(2) << std::setfill('0')
421 dstream << " (DUMPED BY INTERNET_SIMULATOR)";
423 dstream << std::endl;
428 // Lol let's forget it
429 dstream << "UDPSocket::Send(): "
430 "INTERNET_SIMULATOR: dumping packet."
435 if(destination.getFamily() != m_addr_family)
436 throw SendFailedException("Address family mismatch");
439 if(m_addr_family == AF_INET6)
441 struct sockaddr_in6 address = destination.getAddress6();
442 address.sin6_port = htons(destination.getPort());
443 sent = sendto(m_handle, (const char *) data, size,
444 0, (struct sockaddr *) &address, sizeof(struct sockaddr_in6));
448 struct sockaddr_in address = destination.getAddress();
449 address.sin_port = htons(destination.getPort());
450 sent = sendto(m_handle, (const char *) data, size,
451 0, (struct sockaddr *) &address, sizeof(struct sockaddr_in));
456 throw SendFailedException("Failed to send packet");
460 int UDPSocket::Receive(Address & sender, void * data, int size)
463 if(WaitData(m_timeout_ms) == false)
469 if(m_addr_family == AF_INET6)
471 struct sockaddr_in6 address;
472 memset(&address, 0, sizeof(address));
473 socklen_t address_len = sizeof(address);
475 received = recvfrom(m_handle, (char *) data,
476 size, 0, (struct sockaddr *) &address, &address_len);
481 u16 address_port = ntohs(address.sin6_port);
482 IPv6AddressBytes bytes;
483 memcpy(bytes.bytes, address.sin6_addr.s6_addr, 16);
484 sender = Address(&bytes, address_port);
488 struct sockaddr_in address;
489 memset(&address, 0, sizeof(address));
491 socklen_t address_len = sizeof(address);
493 received = recvfrom(m_handle, (char *) data,
494 size, 0, (struct sockaddr *) &address, &address_len);
499 u32 address_ip = ntohl(address.sin_addr.s_addr);
500 u16 address_port = ntohs(address.sin_port);
502 sender = Address(address_ip, address_port);
505 if(socket_enable_debug_output)
507 // Print packet sender and size
508 dstream << (int) m_handle << " <- ";
509 sender.print(&dstream);
510 dstream << ", size=" << received;
512 // Print packet contents
513 dstream << ", data=";
514 for(int i = 0; i < received && i < 20; i++)
518 unsigned int a = ((const unsigned char *) data)[i];
519 dstream << std::hex << std::setw(2) << std::setfill('0')
525 dstream << std::endl;
531 int UDPSocket::GetHandle()
536 void UDPSocket::setTimeoutMs(int timeout_ms)
538 m_timeout_ms = timeout_ms;
541 bool UDPSocket::WaitData(int timeout_ms)
546 // Initialize the set
548 FD_SET(m_handle, &readset);
550 // Initialize time out struct
553 tv.tv_usec = timeout_ms * 1000;
556 result = select(m_handle+1, &readset, NULL, NULL, &tv);
560 else if(result < 0 && (errno == EINTR || errno == EBADF))
561 // N.B. select() fails when sockets are destroyed on Connection's dtor
562 // with EBADF. Instead of doing tricky synchronization, allow this
563 // thread to exit but don't throw an exception.
567 dstream << (int) m_handle << ": Select failed: "
568 << strerror(errno) << std::endl;
571 int e = WSAGetLastError();
572 dstream << (int) m_handle << ": WSAGetLastError()="
574 if(e == 10004 /* = WSAEINTR */ || e == 10009 /*WSAEBADF*/)
576 dstream << "WARNING: Ignoring WSAEINTR/WSAEBADF." << std::endl;
581 throw SocketException("Select failed");
583 else if(FD_ISSET(m_handle, &readset) == false)