/*
-Minetest-c55
-Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
+GNU Lesser General Public License for more details.
-You should have received a copy of the GNU General Public License along
+You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "socket.h"
+
+#ifdef _WIN32
+ #ifndef WIN32_LEAN_AND_MEAN
+ #define WIN32_LEAN_AND_MEAN
+ #endif
+ // Without this some of the network functions are not found on mingw
+ #ifndef _WIN32_WINNT
+ #define _WIN32_WINNT 0x0501
+ #endif
+ #include <windows.h>
+ #include <winsock2.h>
+ #include <ws2tcpip.h>
+ #ifdef _MSC_VER
+ #pragma comment(lib, "ws2_32.lib")
+ #endif
+typedef SOCKET socket_t;
+typedef int socklen_t;
+#else
+ #include <sys/types.h>
+ #include <sys/socket.h>
+ #include <netinet/in.h>
+ #include <fcntl.h>
+ #include <netdb.h>
+ #include <unistd.h>
+ #include <arpa/inet.h>
+typedef int socket_t;
+#endif
+
+#include "constants.h"
#include "debug.h"
+#include "settings.h"
+#include "main.h" // for g_settings
#include <stdio.h>
#include <iostream>
#include <stdlib.h>
+#include <string.h>
#include <errno.h>
+#include <sstream>
+#include "util/string.h"
+#include "util/numeric.h"
-// Debug printing options
-#define DP 0
-#define DPS ""
+// Set to true to enable verbose debug output
+bool socket_enable_debug_output = false;
bool g_sockets_initialized = false;
+// Initialize sockets
void sockets_init()
{
#ifdef _WIN32
+ // Windows needs sockets to be initialized before use
WSADATA WsaData;
if(WSAStartup( MAKEWORD(2,2), &WsaData ) != NO_ERROR)
throw SocketException("WSAStartup failed");
-#else
#endif
g_sockets_initialized = true;
}
void sockets_cleanup()
{
#ifdef _WIN32
+ // On Windows, cleanup sockets after use
WSACleanup();
#endif
}
+/*
+ Address
+*/
+
Address::Address()
{
+ m_addr_family = 0;
+ memset(&m_address, 0, sizeof m_address);
+ m_port = 0;
}
-Address::Address(unsigned int address, unsigned short port)
+Address::Address(u32 address, u16 port)
{
- m_address = address;
- m_port = port;
+ setAddress(address);
+ setPort(port);
}
-Address::Address(unsigned int a, unsigned int b,
- unsigned int c, unsigned int d,
- unsigned short port)
+Address::Address(u8 a, u8 b, u8 c, u8 d, u16 port)
{
- m_address = (a<<24) | (b<<16) | ( c<<8) | d;
- m_port = port;
+ setAddress(a, b, c, d);
+ setPort(port);
+}
+
+Address::Address(const IPv6AddressBytes * ipv6_bytes, u16 port)
+{
+ setAddress(ipv6_bytes);
+ setPort(port);
}
+// Equality (address family, address and port must be equal)
bool Address::operator==(Address &address)
{
- return (m_address == address.m_address
- && m_port == address.m_port);
+ if(address.m_addr_family != m_addr_family || address.m_port != m_port)
+ return false;
+ else if(m_addr_family == AF_INET)
+ {
+ return m_address.ipv4.sin_addr.s_addr ==
+ address.m_address.ipv4.sin_addr.s_addr;
+ }
+ else if(m_addr_family == AF_INET6)
+ {
+ return memcmp(m_address.ipv6.sin6_addr.s6_addr,
+ address.m_address.ipv6.sin6_addr.s6_addr, 16) == 0;
+ }
+ else
+ return false;
}
bool Address::operator!=(Address &address)
void Address::Resolve(const char *name)
{
- struct addrinfo *resolved;
- int e = getaddrinfo(name, NULL, NULL, &resolved);
+ struct addrinfo *resolved, hints;
+ memset(&hints, 0, sizeof(hints));
+
+ // Setup hints
+ hints.ai_socktype = 0;
+ hints.ai_protocol = 0;
+ hints.ai_flags = 0;
+ if(g_settings->getBool("enable_ipv6"))
+ {
+ // AF_UNSPEC allows both IPv6 and IPv4 addresses to be returned
+ hints.ai_family = AF_UNSPEC;
+ }
+ else
+ {
+ hints.ai_family = AF_INET;
+ }
+
+ // Do getaddrinfo()
+ int e = getaddrinfo(name, NULL, &hints, &resolved);
if(e != 0)
+ throw ResolveError(gai_strerror(e));
+
+ // Copy data
+ if(resolved->ai_family == AF_INET)
+ {
+ struct sockaddr_in *t = (struct sockaddr_in *) resolved->ai_addr;
+ m_addr_family = AF_INET;
+ m_address.ipv4 = *t;
+ }
+ else if(resolved->ai_family == AF_INET6)
+ {
+ struct sockaddr_in6 *t = (struct sockaddr_in6 *) resolved->ai_addr;
+ m_addr_family = AF_INET6;
+ m_address.ipv6 = *t;
+ }
+ else
+ {
+ freeaddrinfo(resolved);
throw ResolveError("");
- /*
- FIXME: This is an ugly hack; change the whole class
- to store the address as sockaddr
- */
- struct sockaddr_in *t = (struct sockaddr_in*)resolved->ai_addr;
- m_address = ntohl(t->sin_addr.s_addr);
+ }
freeaddrinfo(resolved);
}
-unsigned int Address::getAddress() const
+// IP address -> textual representation
+std::string Address::serializeString() const
+{
+// windows XP doesnt have inet_ntop, maybe use better func
+#ifdef _WIN32
+ if(m_addr_family == AF_INET)
+ {
+ u8 a, b, c, d, addr;
+ addr = ntohl(m_address.ipv4.sin_addr.s_addr);
+ a = (addr & 0xFF000000) >> 24;
+ b = (addr & 0x00FF0000) >> 16;
+ c = (addr & 0x0000FF00) >> 8;
+ d = (addr & 0x000000FF);
+ return itos(a) + "." + itos(b) + "." + itos(c) + "." + itos(d);
+ }
+ else if(m_addr_family == AF_INET6)
+ {
+ std::ostringstream os;
+ for(int i = 0; i < 16; i += 2)
+ {
+ u16 section =
+ (m_address.ipv6.sin6_addr.s6_addr[i] << 8) |
+ (m_address.ipv6.sin6_addr.s6_addr[i + 1]);
+ os << std::hex << section;
+ if(i < 14)
+ os << ":";
+ }
+ return os.str();
+ }
+ else
+ return std::string("");
+#else
+ char str[INET6_ADDRSTRLEN];
+ 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) {
+ return std::string("");
+ }
+ return std::string(str);
+#endif
+}
+
+struct sockaddr_in Address::getAddress() const
+{
+ return m_address.ipv4; // NOTE: NO PORT INCLUDED, use getPort()
+}
+
+struct sockaddr_in6 Address::getAddress6() const
{
- return m_address;
+ return m_address.ipv6; // NOTE: NO PORT INCLUDED, use getPort()
}
-unsigned short Address::getPort() const
+u16 Address::getPort() const
{
return m_port;
}
-void Address::setAddress(unsigned int address)
+int Address::getFamily() const
{
- m_address = address;
+ return m_addr_family;
}
-void Address::setPort(unsigned short port)
+bool Address::isIPv6() const
{
- m_port = port;
+ return m_addr_family == AF_INET6;
}
-void Address::print(std::ostream *s) const
+void Address::setAddress(u32 address)
+{
+ m_addr_family = AF_INET;
+ m_address.ipv4.sin_family = AF_INET;
+ m_address.ipv4.sin_addr.s_addr = htonl(address);
+}
+
+void Address::setAddress(u8 a, u8 b, u8 c, u8 d)
+{
+ m_addr_family = AF_INET;
+ m_address.ipv4.sin_family = AF_INET;
+ u32 addr = htonl((a << 24) | (b << 16) | (c << 8) | d);
+ m_address.ipv4.sin_addr.s_addr = addr;
+}
+
+void Address::setAddress(const IPv6AddressBytes * ipv6_bytes)
{
- (*s)<<((m_address>>24)&0xff)<<"."
- <<((m_address>>16)&0xff)<<"."
- <<((m_address>>8)&0xff)<<"."
- <<((m_address>>0)&0xff)<<":"
- <<m_port;
+ m_addr_family = AF_INET6;
+ m_address.ipv6.sin6_family = AF_INET6;
+ if(ipv6_bytes)
+ memcpy(m_address.ipv6.sin6_addr.s6_addr, ipv6_bytes->bytes, 16);
+ else
+ memset(m_address.ipv6.sin6_addr.s6_addr, 0, 16);
}
-void Address::print() const
+void Address::setPort(u16 port)
{
- print(&dstream);
+ m_port = port;
}
-UDPSocket::UDPSocket()
+void Address::print(std::ostream *s) const
+{
+ if(m_addr_family == AF_INET6)
+ {
+ (*s) << "[" << serializeString() << "]:" << m_port;
+ }
+ else
+ {
+ (*s) << serializeString() << ":" << m_port;
+ }
+}
+
+/*
+ UDPSocket
+*/
+
+UDPSocket::UDPSocket(bool ipv6)
{
if(g_sockets_initialized == false)
throw SocketException("Sockets not initialized");
-
- m_handle = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
-
- if(DP)
- dstream<<DPS<<"UDPSocket("<<(int)m_handle<<")::UDPSocket()"<<std::endl;
-
- if(m_handle <= 0)
- {
- throw SocketException("Failed to create socket");
- }
-/*#ifdef _WIN32
- DWORD nonblocking = 0;
- if(ioctlsocket(m_handle, FIONBIO, &nonblocking) != 0)
+ // Use IPv6 if specified
+ m_addr_family = ipv6 ? AF_INET6 : AF_INET;
+ m_handle = socket(m_addr_family, SOCK_DGRAM, IPPROTO_UDP);
+
+ if(socket_enable_debug_output)
{
- throw SocketException("Failed set non-blocking mode");
+ dstream << "UDPSocket(" << (int) m_handle
+ << ")::UDPSocket(): ipv6 = "
+ << (ipv6 ? "true" : "false")
+ << std::endl;
}
-#else
- int nonblocking = 0;
- if(fcntl(m_handle, F_SETFL, O_NONBLOCK, nonblocking) == -1)
+
+ if(m_handle <= 0)
{
- throw SocketException("Failed set non-blocking mode");
+ throw SocketException("Failed to create socket");
}
-#endif*/
setTimeoutMs(0);
}
UDPSocket::~UDPSocket()
{
- if(DP)
- dstream<<DPS<<"UDPSocket("<<(int)m_handle<<")::~UDPSocket()"<<std::endl;
+ if(socket_enable_debug_output)
+ {
+ dstream << "UDPSocket( " << (int) m_handle << ")::~UDPSocket()"
+ << std::endl;
+ }
#ifdef _WIN32
closesocket(m_handle);
#endif
}
-void UDPSocket::Bind(unsigned short port)
+void UDPSocket::Bind(u16 port)
{
- if(DP)
- dstream<<DPS<<"UDPSocket("<<(int)m_handle
- <<")::Bind(): port="<<port<<std::endl;
-
- sockaddr_in address;
- address.sin_family = AF_INET;
- address.sin_addr.s_addr = INADDR_ANY;
- address.sin_port = htons(port);
-
- if(bind(m_handle, (const sockaddr*)&address, sizeof(sockaddr_in)) < 0)
- {
-#ifndef DISABLE_ERRNO
- dstream<<(int)m_handle<<": Bind failed: "<<strerror(errno)<<std::endl;
-#endif
- throw SocketException("Failed to bind socket");
- }
+ if(socket_enable_debug_output)
+ {
+ dstream << "UDPSocket(" << (int) m_handle << ")::Bind(): "
+ << "port=" << port << std::endl;
+ }
+
+ if(m_addr_family == AF_INET6)
+ {
+ struct sockaddr_in6 address;
+ address.sin6_family = AF_INET6;
+ address.sin6_addr = in6addr_any;
+ address.sin6_port = htons(port);
+
+ if(bind(m_handle, (const struct sockaddr *) &address,
+ sizeof(struct sockaddr_in6)) < 0)
+ {
+ dstream << (int) m_handle << ": Bind failed: "
+ << strerror(errno) << std::endl;
+ throw SocketException("Failed to bind socket");
+ }
+ }
+ else
+ {
+ struct sockaddr_in address;
+ address.sin_family = AF_INET;
+ address.sin_addr.s_addr = INADDR_ANY;
+ address.sin_port = htons(port);
+
+ if(bind(m_handle, (const struct sockaddr *) &address,
+ sizeof(struct sockaddr_in)) < 0)
+ {
+ dstream << (int) m_handle << ": Bind failed: "
+ << strerror(errno) << std::endl;
+ throw SocketException("Failed to bind socket");
+ }
+ }
}
void UDPSocket::Send(const Address & destination, const void * data, int size)
{
- bool dumping_packet = false;
+ bool dumping_packet = false; // for INTERNET_SIMULATOR
+
if(INTERNET_SIMULATOR)
- dumping_packet = (rand()%10==0); //easy
- //dumping_packet = (rand()%4==0); // hard
-
- if(DP){
- /*dstream<<DPS<<"UDPSocket("<<(int)m_handle
- <<")::Send(): destination=";*/
- dstream<<DPS;
- dstream<<(int)m_handle<<" -> ";
- destination.print();
- dstream<<", size="<<size<<", data=";
- for(int i=0; i<size && i<20; i++){
- if(i%2==0) printf(" ");
- DEBUGPRINT("%.2X", ((int)((const char*)data)[i])&0xff);
+ dumping_packet = (myrand() % INTERNET_SIMULATOR_PACKET_LOSS == 0);
+
+ if(socket_enable_debug_output)
+ {
+ // Print packet destination and size
+ dstream << (int) m_handle << " -> ";
+ destination.print(&dstream);
+ dstream << ", size=" << size;
+
+ // Print packet contents
+ dstream << ", data=";
+ for(int i = 0; i < size && i < 20; i++)
+ {
+ if(i % 2 == 0)
+ DEBUGPRINT(" ");
+ unsigned int a = ((const unsigned char *) data)[i];
+ DEBUGPRINT("%.2X", a);
}
- if(size>20)
- dstream<<"...";
+
+ if(size > 20)
+ dstream << "...";
+
if(dumping_packet)
- dstream<<" (DUMPED BY INTERNET_SIMULATOR)";
- dstream<<std::endl;
- }
- else if(dumping_packet)
- {
- // Lol let's forget it
- dstream<<"UDPSocket::Send(): "
- "INTERNET_SIMULATOR: dumping packet."
- <<std::endl;
+ dstream << " (DUMPED BY INTERNET_SIMULATOR)";
+
+ dstream << std::endl;
}
if(dumping_packet)
+ {
+ // Lol let's forget it
+ dstream << "UDPSocket::Send(): "
+ "INTERNET_SIMULATOR: dumping packet."
+ << std::endl;
return;
+ }
- sockaddr_in address;
- address.sin_family = AF_INET;
- address.sin_addr.s_addr = htonl(destination.getAddress());
- address.sin_port = htons(destination.getPort());
+ if(destination.getFamily() != m_addr_family)
+ throw SendFailedException("Address family mismatch");
- int sent = sendto(m_handle, (const char*)data, size,
- 0, (sockaddr*)&address, sizeof(sockaddr_in));
+ int sent;
+ if(m_addr_family == AF_INET6)
+ {
+ struct sockaddr_in6 address = destination.getAddress6();
+ address.sin6_port = htons(destination.getPort());
+ sent = sendto(m_handle, (const char *) data, size,
+ 0, (struct sockaddr *) &address, sizeof(struct sockaddr_in6));
+ }
+ else
+ {
+ struct sockaddr_in address = destination.getAddress();
+ address.sin_port = htons(destination.getPort());
+ sent = sendto(m_handle, (const char *) data, size,
+ 0, (struct sockaddr *) &address, sizeof(struct sockaddr_in));
+ }
- if(sent != size)
- {
+ if(sent != size)
+ {
throw SendFailedException("Failed to send packet");
- }
+ }
}
int UDPSocket::Receive(Address & sender, void * data, int size)
{
+ // Return on timeout
if(WaitData(m_timeout_ms) == false)
{
return -1;
}
- sockaddr_in address;
- socklen_t address_len = sizeof(address);
+ int received;
+ if(m_addr_family == AF_INET6)
+ {
+ struct sockaddr_in6 address;
+ socklen_t address_len = sizeof(address);
- int received = recvfrom(m_handle, (char*)data,
- size, 0, (sockaddr*)&address, &address_len);
+ received = recvfrom(m_handle, (char *) data,
+ size, 0, (struct sockaddr *) &address, &address_len);
- if(received < 0)
- return -1;
+ if(received < 0)
+ return -1;
- unsigned int address_ip = ntohl(address.sin_addr.s_addr);
- unsigned int address_port = ntohs(address.sin_port);
+ u16 address_port = ntohs(address.sin6_port);
+ IPv6AddressBytes bytes;
+ memcpy(bytes.bytes, address.sin6_addr.s6_addr, 16);
+ sender = Address(&bytes, address_port);
+ }
+ else
+ {
+ struct sockaddr_in address;
+ socklen_t address_len = sizeof(address);
+
+ received = recvfrom(m_handle, (char *) data,
+ size, 0, (struct sockaddr *) &address, &address_len);
+
+ if(received < 0)
+ return -1;
+
+ u32 address_ip = ntohl(address.sin_addr.s_addr);
+ u16 address_port = ntohs(address.sin_port);
- sender = Address(address_ip, address_port);
+ sender = Address(address_ip, address_port);
+ }
- if(DP){
- //dstream<<DPS<<"UDPSocket("<<(int)m_handle<<")::Receive(): sender=";
- dstream<<DPS<<(int)m_handle<<" <- ";
- sender.print();
- //dstream<<", received="<<received<<std::endl;
- dstream<<", size="<<received<<", data=";
- for(int i=0; i<received && i<20; i++){
- if(i%2==0) printf(" ");
- DEBUGPRINT("%.2X", ((int)((const char*)data)[i])&0xff);
+ if(socket_enable_debug_output)
+ {
+ // Print packet sender and size
+ dstream << (int) m_handle << " <- ";
+ sender.print(&dstream);
+ dstream << ", size=" << received;
+
+ // Print packet contents
+ dstream << ", data=";
+ for(int i = 0; i < received && i < 20; i++)
+ {
+ if(i % 2 == 0)
+ DEBUGPRINT(" ");
+ unsigned int a = ((const unsigned char *) data)[i];
+ DEBUGPRINT("%.2X", a);
}
- if(received>20)
- dstream<<"...";
- dstream<<std::endl;
+ if(received > 20)
+ dstream << "...";
+
+ dstream << std::endl;
}
return received;
struct timeval tv;
tv.tv_sec = 0;
tv.tv_usec = timeout_ms * 1000;
+
// select()
result = select(m_handle+1, &readset, NULL, NULL, &tv);
- if(result == 0){
- // Timeout
- /*dstream<<"Select timed out (timeout_ms="
- <<timeout_ms<<")"<<std::endl;*/
+ if(result == 0)
return false;
- }
- else if(result < 0){
- // Error
-#ifndef DISABLE_ERRNO
- dstream<<(int)m_handle<<": Select failed: "<<strerror(errno)<<std::endl;
-#endif
+ else if(result < 0 && errno == EINTR)
+ return false;
+ else if(result < 0)
+ {
+ dstream << (int) m_handle << ": Select failed: "
+ << strerror(errno) << std::endl;
+
#ifdef _WIN32
int e = WSAGetLastError();
- dstream<<(int)m_handle<<": WSAGetLastError()="<<e<<std::endl;
- if(e == 10004 /*=WSAEINTR*/)
+ dstream << (int) m_handle << ": WSAGetLastError()="
+ << e << std::endl;
+ if(e == 10004 /* = WSAEINTR */)
{
- dstream<<"WARNING: Ignoring WSAEINTR."<<std::endl;
+ dstream << "WARNING: Ignoring WSAEINTR." << std::endl;
return false;
}
#endif
+
throw SocketException("Select failed");
}
- else if(FD_ISSET(m_handle, &readset) == false){
+ else if(FD_ISSET(m_handle, &readset) == false)
+ {
// No data
- //dstream<<"Select reported no data in m_handle"<<std::endl;
return false;
}
// There is data
- //dstream<<"Select reported data in m_handle"<<std::endl;
return true;
}
projects / oweals / minetest.git / blobdiff