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@@ -1,590 +0,0 @@
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-/*
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-Minetest
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-Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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-
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-This program is free software; you can redistribute it and/or modify
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-it under the terms of the GNU Lesser General Public License as published by
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-the Free Software Foundation; either version 2.1 of the License, or
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-(at your option) any later version.
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-
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-This program is distributed in the hope that it will be useful,
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-but WITHOUT ANY WARRANTY; without even the implied warranty of
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-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-GNU Lesser General Public License for more details.
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-
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-You should have received a copy of the GNU Lesser General Public License along
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-with this program; if not, write to the Free Software Foundation, Inc.,
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-51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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-*/
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-
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-#include "socket.h"
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-
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-#include <cstdio>
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-#include <iostream>
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-#include <cstdlib>
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-#include <cstring>
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-#include <cerrno>
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-#include <sstream>
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-#include <iomanip>
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-#include "util/string.h"
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-#include "util/numeric.h"
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-#include "constants.h"
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-#include "debug.h"
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-#include "settings.h"
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-#include "log.h"
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-
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-#ifdef _WIN32
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- // Without this some of the network functions are not found on mingw
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- #ifndef _WIN32_WINNT
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- #define _WIN32_WINNT 0x0501
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- #endif
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- #include <windows.h>
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- #include <winsock2.h>
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- #include <ws2tcpip.h>
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- #define LAST_SOCKET_ERR() WSAGetLastError()
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- typedef SOCKET socket_t;
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- typedef int socklen_t;
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-#else
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- #include <sys/types.h>
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- #include <sys/socket.h>
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- #include <netinet/in.h>
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- #include <fcntl.h>
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- #include <netdb.h>
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- #include <unistd.h>
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- #include <arpa/inet.h>
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- #define LAST_SOCKET_ERR() (errno)
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- typedef int socket_t;
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-#endif
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-
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-// Set to true to enable verbose debug output
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-bool socket_enable_debug_output = false; // yuck
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-
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-static bool g_sockets_initialized = false;
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-
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-// Initialize sockets
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-void sockets_init()
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-{
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-#ifdef _WIN32
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- // Windows needs sockets to be initialized before use
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- WSADATA WsaData;
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- if(WSAStartup( MAKEWORD(2,2), &WsaData ) != NO_ERROR)
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- throw SocketException("WSAStartup failed");
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-#endif
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- g_sockets_initialized = true;
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-}
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-
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-void sockets_cleanup()
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-{
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-#ifdef _WIN32
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- // On Windows, cleanup sockets after use
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- WSACleanup();
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-#endif
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-}
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-
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-/*
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- Address
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-*/
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-
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-Address::Address()
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-{
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- memset(&m_address, 0, sizeof(m_address));
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-}
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-
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-Address::Address(u32 address, u16 port)
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-{
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- memset(&m_address, 0, sizeof(m_address));
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- setAddress(address);
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- setPort(port);
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-}
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-
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-Address::Address(u8 a, u8 b, u8 c, u8 d, u16 port)
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-{
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- memset(&m_address, 0, sizeof(m_address));
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- setAddress(a, b, c, d);
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- setPort(port);
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-}
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-
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-Address::Address(const IPv6AddressBytes *ipv6_bytes, u16 port)
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-{
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- memset(&m_address, 0, sizeof(m_address));
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- setAddress(ipv6_bytes);
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- setPort(port);
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-}
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-
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-// Equality (address family, address and port must be equal)
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-bool Address::operator==(const Address &address)
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-{
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- if (address.m_addr_family != m_addr_family || address.m_port != m_port)
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- return false;
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-
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- if (m_addr_family == AF_INET) {
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- return m_address.ipv4.sin_addr.s_addr ==
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- address.m_address.ipv4.sin_addr.s_addr;
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- }
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-
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- if (m_addr_family == AF_INET6) {
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- return memcmp(m_address.ipv6.sin6_addr.s6_addr,
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- address.m_address.ipv6.sin6_addr.s6_addr, 16) == 0;
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- }
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-
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- return false;
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-}
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-
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-bool Address::operator!=(const Address &address)
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-{
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- return !(*this == address);
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-}
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-
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-void Address::Resolve(const char *name)
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-{
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- if (!name || name[0] == 0) {
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- if (m_addr_family == AF_INET) {
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- setAddress((u32) 0);
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- } else if (m_addr_family == AF_INET6) {
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- setAddress((IPv6AddressBytes*) 0);
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- }
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- return;
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- }
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-
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- struct addrinfo *resolved, hints;
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- memset(&hints, 0, sizeof(hints));
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-
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- // Setup hints
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- hints.ai_socktype = 0;
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- hints.ai_protocol = 0;
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- hints.ai_flags = 0;
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- if(g_settings->getBool("enable_ipv6"))
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- {
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- // AF_UNSPEC allows both IPv6 and IPv4 addresses to be returned
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- hints.ai_family = AF_UNSPEC;
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- }
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- else
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- {
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- hints.ai_family = AF_INET;
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- }
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-
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- // Do getaddrinfo()
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- int e = getaddrinfo(name, NULL, &hints, &resolved);
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- if(e != 0)
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- throw ResolveError(gai_strerror(e));
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-
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- // Copy data
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- if(resolved->ai_family == AF_INET)
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- {
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- struct sockaddr_in *t = (struct sockaddr_in *) resolved->ai_addr;
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- m_addr_family = AF_INET;
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- m_address.ipv4 = *t;
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- }
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- else if(resolved->ai_family == AF_INET6)
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- {
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- struct sockaddr_in6 *t = (struct sockaddr_in6 *) resolved->ai_addr;
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- m_addr_family = AF_INET6;
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- m_address.ipv6 = *t;
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- }
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- else
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- {
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- freeaddrinfo(resolved);
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- throw ResolveError("");
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- }
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- freeaddrinfo(resolved);
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-}
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-
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-// IP address -> textual representation
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-std::string Address::serializeString() const
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-{
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-// windows XP doesnt have inet_ntop, maybe use better func
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-#ifdef _WIN32
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- if(m_addr_family == AF_INET)
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- {
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- u8 a, b, c, d;
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- u32 addr;
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- addr = ntohl(m_address.ipv4.sin_addr.s_addr);
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- a = (addr & 0xFF000000) >> 24;
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- b = (addr & 0x00FF0000) >> 16;
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- c = (addr & 0x0000FF00) >> 8;
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- d = (addr & 0x000000FF);
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- return itos(a) + "." + itos(b) + "." + itos(c) + "." + itos(d);
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- }
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- else if(m_addr_family == AF_INET6)
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- {
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- std::ostringstream os;
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- for(int i = 0; i < 16; i += 2)
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- {
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- u16 section =
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- (m_address.ipv6.sin6_addr.s6_addr[i] << 8) |
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- (m_address.ipv6.sin6_addr.s6_addr[i + 1]);
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- os << std::hex << section;
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- if(i < 14)
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- os << ":";
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- }
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- return os.str();
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- }
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- else
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- return std::string("");
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-#else
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- char str[INET6_ADDRSTRLEN];
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- 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) {
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- return std::string("");
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- }
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- return std::string(str);
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-#endif
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-}
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-
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-struct sockaddr_in Address::getAddress() const
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-{
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- return m_address.ipv4; // NOTE: NO PORT INCLUDED, use getPort()
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-}
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-
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-struct sockaddr_in6 Address::getAddress6() const
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-{
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- return m_address.ipv6; // NOTE: NO PORT INCLUDED, use getPort()
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-}
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-
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-u16 Address::getPort() const
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-{
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- return m_port;
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-}
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-
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-int Address::getFamily() const
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-{
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- return m_addr_family;
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-}
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-
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-bool Address::isIPv6() const
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-{
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- return m_addr_family == AF_INET6;
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-}
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-
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-bool Address::isZero() const
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-{
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- if (m_addr_family == AF_INET) {
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- return m_address.ipv4.sin_addr.s_addr == 0;
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- }
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-
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- if (m_addr_family == AF_INET6) {
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- static const char zero[16] = {0};
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- return memcmp(m_address.ipv6.sin6_addr.s6_addr,
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- zero, 16) == 0;
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- }
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- return false;
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-}
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-
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-void Address::setAddress(u32 address)
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-{
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- m_addr_family = AF_INET;
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- m_address.ipv4.sin_family = AF_INET;
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- m_address.ipv4.sin_addr.s_addr = htonl(address);
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-}
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-
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-void Address::setAddress(u8 a, u8 b, u8 c, u8 d)
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-{
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- m_addr_family = AF_INET;
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- m_address.ipv4.sin_family = AF_INET;
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- u32 addr = htonl((a << 24) | (b << 16) | (c << 8) | d);
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- m_address.ipv4.sin_addr.s_addr = addr;
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-}
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-
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-void Address::setAddress(const IPv6AddressBytes *ipv6_bytes)
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-{
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- m_addr_family = AF_INET6;
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- m_address.ipv6.sin6_family = AF_INET6;
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- if (ipv6_bytes)
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- memcpy(m_address.ipv6.sin6_addr.s6_addr, ipv6_bytes->bytes, 16);
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- else
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- memset(m_address.ipv6.sin6_addr.s6_addr, 0, 16);
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-}
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-
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-void Address::setPort(u16 port)
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-{
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- m_port = port;
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-}
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-
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-void Address::print(std::ostream *s) const
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-{
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- if(m_addr_family == AF_INET6)
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- *s << "[" << serializeString() << "]:" << m_port;
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- else
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- *s << serializeString() << ":" << m_port;
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-}
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-
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-/*
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- UDPSocket
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-*/
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-
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-UDPSocket::UDPSocket(bool ipv6)
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-{
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- init(ipv6, false);
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-}
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-
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-bool UDPSocket::init(bool ipv6, bool noExceptions)
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-{
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- if (!g_sockets_initialized) {
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- dstream << "Sockets not initialized" << std::endl;
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- return false;
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- }
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-
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- // Use IPv6 if specified
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- m_addr_family = ipv6 ? AF_INET6 : AF_INET;
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- m_handle = socket(m_addr_family, SOCK_DGRAM, IPPROTO_UDP);
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-
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- if (socket_enable_debug_output) {
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- dstream << "UDPSocket(" << (int) m_handle
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- << ")::UDPSocket(): ipv6 = "
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- << (ipv6 ? "true" : "false")
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- << std::endl;
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- }
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-
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- if (m_handle <= 0) {
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- if (noExceptions) {
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- return false;
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- }
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-
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- throw SocketException(std::string("Failed to create socket: error ")
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- + itos(LAST_SOCKET_ERR()));
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- }
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-
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- setTimeoutMs(0);
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-
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- return true;
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-}
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-
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-
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-UDPSocket::~UDPSocket()
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-{
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- if (socket_enable_debug_output) {
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- dstream << "UDPSocket( " << (int) m_handle << ")::~UDPSocket()"
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- << std::endl;
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- }
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-
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-#ifdef _WIN32
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- closesocket(m_handle);
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-#else
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- close(m_handle);
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-#endif
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-}
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-
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-void UDPSocket::Bind(Address addr)
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-{
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- if(socket_enable_debug_output) {
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- dstream << "UDPSocket(" << (int) m_handle << ")::Bind(): "
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- << addr.serializeString() << ":"
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- << addr.getPort() << std::endl;
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- }
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-
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- if (addr.getFamily() != m_addr_family) {
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- static const char *errmsg = "Socket and bind address families do not match";
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- errorstream << "Bind failed: " << errmsg << std::endl;
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- throw SocketException(errmsg);
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- }
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-
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- if(m_addr_family == AF_INET6) {
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- struct sockaddr_in6 address;
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- memset(&address, 0, sizeof(address));
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-
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- address = addr.getAddress6();
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- address.sin6_family = AF_INET6;
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- address.sin6_port = htons(addr.getPort());
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-
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- if(bind(m_handle, (const struct sockaddr *) &address,
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- sizeof(struct sockaddr_in6)) < 0) {
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- dstream << (int) m_handle << ": Bind failed: "
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- << strerror(errno) << std::endl;
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- throw SocketException("Failed to bind socket");
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- }
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- } else {
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- struct sockaddr_in address;
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- memset(&address, 0, sizeof(address));
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-
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- address = addr.getAddress();
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- address.sin_family = AF_INET;
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- address.sin_port = htons(addr.getPort());
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-
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- if (bind(m_handle, (const struct sockaddr *) &address,
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- sizeof(struct sockaddr_in)) < 0) {
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- dstream << (int)m_handle << ": Bind failed: "
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- << strerror(errno) << std::endl;
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- throw SocketException("Failed to bind socket");
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- }
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- }
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-}
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-
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-void UDPSocket::Send(const Address & destination, const void * data, int size)
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-{
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- bool dumping_packet = false; // for INTERNET_SIMULATOR
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-
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- if(INTERNET_SIMULATOR)
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- dumping_packet = myrand() % INTERNET_SIMULATOR_PACKET_LOSS == 0;
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-
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- if(socket_enable_debug_output) {
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- // Print packet destination and size
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- dstream << (int)m_handle << " -> ";
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- destination.print(&dstream);
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- dstream << ", size=" << size;
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-
|
|
|
- // Print packet contents
|
|
|
- dstream << ", data=";
|
|
|
- for(int i = 0; i < size && i < 20; i++) {
|
|
|
- if(i % 2 == 0)
|
|
|
- dstream << " ";
|
|
|
- unsigned int a = ((const unsigned char *)data)[i];
|
|
|
- dstream << std::hex << std::setw(2) << std::setfill('0') << a;
|
|
|
- }
|
|
|
-
|
|
|
- if(size > 20)
|
|
|
- dstream << "...";
|
|
|
-
|
|
|
- if(dumping_packet)
|
|
|
- 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;
|
|
|
- }
|
|
|
-
|
|
|
- if(destination.getFamily() != m_addr_family)
|
|
|
- throw SendFailedException("Address family mismatch");
|
|
|
-
|
|
|
- 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)
|
|
|
- throw SendFailedException("Failed to send packet");
|
|
|
-}
|
|
|
-
|
|
|
-int UDPSocket::Receive(Address & sender, void *data, int size)
|
|
|
-{
|
|
|
- // Return on timeout
|
|
|
- if (!WaitData(m_timeout_ms))
|
|
|
- return -1;
|
|
|
-
|
|
|
- int received;
|
|
|
- if (m_addr_family == AF_INET6) {
|
|
|
- struct sockaddr_in6 address;
|
|
|
- memset(&address, 0, sizeof(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;
|
|
|
-
|
|
|
- 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;
|
|
|
- memset(&address, 0, sizeof(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);
|
|
|
- }
|
|
|
-
|
|
|
- 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)
|
|
|
- dstream << " ";
|
|
|
- unsigned int a = ((const unsigned char *) data)[i];
|
|
|
- dstream << std::hex << std::setw(2) << std::setfill('0') << a;
|
|
|
- }
|
|
|
- if(received > 20)
|
|
|
- dstream << "...";
|
|
|
-
|
|
|
- dstream << std::endl;
|
|
|
- }
|
|
|
-
|
|
|
- return received;
|
|
|
-}
|
|
|
-
|
|
|
-int UDPSocket::GetHandle()
|
|
|
-{
|
|
|
- return m_handle;
|
|
|
-}
|
|
|
-
|
|
|
-void UDPSocket::setTimeoutMs(int timeout_ms)
|
|
|
-{
|
|
|
- m_timeout_ms = timeout_ms;
|
|
|
-}
|
|
|
-
|
|
|
-bool UDPSocket::WaitData(int timeout_ms)
|
|
|
-{
|
|
|
- fd_set readset;
|
|
|
- int result;
|
|
|
-
|
|
|
- // Initialize the set
|
|
|
- FD_ZERO(&readset);
|
|
|
- FD_SET(m_handle, &readset);
|
|
|
-
|
|
|
- // Initialize time out struct
|
|
|
- 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)
|
|
|
- return false;
|
|
|
-
|
|
|
- if (result < 0 && (errno == EINTR || errno == EBADF)) {
|
|
|
- // N.B. select() fails when sockets are destroyed on Connection's dtor
|
|
|
- // with EBADF. Instead of doing tricky synchronization, allow this
|
|
|
- // thread to exit but don't throw an exception.
|
|
|
- return false;
|
|
|
- }
|
|
|
-
|
|
|
- if (result < 0) {
|
|
|
- dstream << 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 */ || e == 10009 /* WSAEBADF */) {
|
|
|
- infostream << "Ignoring WSAEINTR/WSAEBADF." << std::endl;
|
|
|
- return false;
|
|
|
- }
|
|
|
-#endif
|
|
|
-
|
|
|
- throw SocketException("Select failed");
|
|
|
- } else if (!FD_ISSET(m_handle, &readset)) {
|
|
|
- // No data
|
|
|
- return false;
|
|
|
- }
|
|
|
-
|
|
|
- // There is data
|
|
|
- return true;
|
|
|
-}
|