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Network cleanup (#6302)

Browse source 
* Cleanup network headers

* Move peerhandler to a specific header to reduce compilation times
* Move socket.cpp/h to network folder

* More work

* Network code cleanups

* Move socket.{cpp,h} to network folder
* Move Address object to network/address.{cpp,h}
* Move network exceptions to network/networkexceptions.h
* Client: use unique_ptr for Connection
* Server/ClientIface: use shared_ptr for Connection

* Format fixes

* Remove socket.cpp socket.h from clang-format whitelist

* Also fix NetworkPacket code style & make it under clang-format
This commit is contained in:
Loïc Blot 2017-08-24 08:28:54 +02:00 • committed by GitHub
parent 928609c8bd
commit c7160cb629
27 changed files with 1059 additions and 924 deletions
Download patch file Download diff file Expand all files Collapse all files

2
src/network/CMakeLists.txt
View file

@ -1,8 +1,10 @@
set(common_network_SRCS
${CMAKE_CURRENT_SOURCE_DIR}/address.cpp
${CMAKE_CURRENT_SOURCE_DIR}/connection.cpp
${CMAKE_CURRENT_SOURCE_DIR}/networkpacket.cpp
${CMAKE_CURRENT_SOURCE_DIR}/serverpackethandler.cpp
${CMAKE_CURRENT_SOURCE_DIR}/serveropcodes.cpp
${CMAKE_CURRENT_SOURCE_DIR}/socket.cpp
PARENT_SCOPE
)

273
src/network/address.cpp Normal file
View file

@ -0,0 +1,273 @@
/*
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 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 Lesser General Public License for more details.
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 "address.h"
#include <cstdio>
#include <iostream>
#include <cstdlib>
#include <cstring>
#include <cerrno>
#include <sstream>
#include <iomanip>
#include "network/networkexceptions.h"
#include "util/string.h"
#include "util/numeric.h"
#include "constants.h"
#include "debug.h"
#include "settings.h"
#include "log.h"
#ifdef _WIN32
// 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>
#define LAST_SOCKET_ERR() WSAGetLastError()
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>
#define LAST_SOCKET_ERR() (errno)
typedef int socket_t;
#endif
/*
Address
*/
Address::Address()
{
memset(&m_address, 0, sizeof(m_address));
}
Address::Address(u32 address, u16 port)
{
memset(&m_address, 0, sizeof(m_address));
setAddress(address);
setPort(port);
}
Address::Address(u8 a, u8 b, u8 c, u8 d, u16 port)
{
memset(&m_address, 0, sizeof(m_address));
setAddress(a, b, c, d);
setPort(port);
}
Address::Address(const IPv6AddressBytes *ipv6_bytes, u16 port)
{
memset(&m_address, 0, sizeof(m_address));
setAddress(ipv6_bytes);
setPort(port);
}
// Equality (address family, address and port must be equal)
bool Address::operator==(const Address &address)
{
if (address.m_addr_family != m_addr_family || address.m_port != m_port)
return false;
if (m_addr_family == AF_INET) {
return m_address.ipv4.sin_addr.s_addr ==
address.m_address.ipv4.sin_addr.s_addr;
}
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;
}
return false;
}
bool Address::operator!=(const Address &address)
{
return !(*this == address);
}
void Address::Resolve(const char *name)
{
if (!name || name[0] == 0) {
if (m_addr_family == AF_INET) {
setAddress((u32)0);
} else if (m_addr_family == AF_INET6) {
setAddress((IPv6AddressBytes *)0);
}
return;
}
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("");
}
freeaddrinfo(resolved);
}
// 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;
u32 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.ipv6; // NOTE: NO PORT INCLUDED, use getPort()
}
u16 Address::getPort() const
{
return m_port;
}
int Address::getFamily() const
{
return m_addr_family;
}
bool Address::isIPv6() const
{
return m_addr_family == AF_INET6;
}
bool Address::isZero() const
{
if (m_addr_family == AF_INET) {
return m_address.ipv4.sin_addr.s_addr == 0;
}
if (m_addr_family == AF_INET6) {
static const char zero[16] = {0};
return memcmp(m_address.ipv6.sin6_addr.s6_addr, zero, 16) == 0;
}
return false;
}
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)
{
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::setPort(u16 port)
{
m_port = port;
}
void Address::print(std::ostream *s) const
{
if (m_addr_family == AF_INET6)
*s << "[" << serializeString() << "]:" << m_port;
else
*s << serializeString() << ":" << m_port;
}

77
src/network/address.h Normal file
View file

@ -0,0 +1,77 @@
/*
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 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 Lesser General Public License for more details.
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.
*/
#pragma once
#ifdef _WIN32
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0501
#endif
#include <windows.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#else
#include <netinet/in.h>
#endif
#include <ostream>
#include <cstring>
#include "irrlichttypes.h"
#include "networkexceptions.h"
class IPv6AddressBytes
{
public:
u8 bytes[16];
IPv6AddressBytes() { memset(bytes, 0, 16); }
};
class Address
{
public:
Address();
Address(u32 address, u16 port);
Address(u8 a, u8 b, u8 c, u8 d, u16 port);
Address(const IPv6AddressBytes *ipv6_bytes, u16 port);
bool operator==(const Address &address);
bool operator!=(const Address &address);
// Resolve() may throw ResolveError (address is unchanged in this case)
void Resolve(const char *name);
struct sockaddr_in getAddress() const;
unsigned short getPort() const;
void setAddress(u32 address);
void setAddress(u8 a, u8 b, u8 c, u8 d);
void setAddress(const IPv6AddressBytes *ipv6_bytes);
struct sockaddr_in6 getAddress6() const;
int getFamily() const;
bool isIPv6() const;
bool isZero() const;
void setPort(unsigned short port);
void print(std::ostream *s) const;
std::string serializeString() const;
private:
unsigned int m_addr_family = 0;
union
{
struct sockaddr_in ipv4;
struct sockaddr_in6 ipv6;
} m_address;
u16 m_port = 0; // Port is separate from sockaddr structures
};

3
src/network/clientpackethandler.cpp
View file

@ -31,6 +31,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "server.h"
#include "util/strfnd.h"
#include "network/clientopcodes.h"
#include "network/connection.h"
#include "script/scripting_client.h"
#include "util/serialize.h"
#include "util/srp.h"
@ -97,7 +98,7 @@ void Client::handleCommand_Hello(NetworkPacket* pkt)
m_chosen_auth_mech = AUTH_MECHANISM_NONE;
m_access_denied = true;
m_access_denied_reason = "Unknown";
m_con.Disconnect();
m_con->Disconnect();
}
}

1
src/network/connection.cpp
View file

@ -24,6 +24,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "log.h"
#include "porting.h"
#include "network/networkpacket.h"
#include "network/peerhandler.h"
#include "util/serialize.h"
#include "util/numeric.h"
#include "util/string.h"

131
src/network/connection.h
View file

@ -20,8 +20,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#pragma once
#include "irrlichttypes_bloated.h"
#include "peerhandler.h"
#include "socket.h"
#include "exceptions.h"
#include "constants.h"
#include "util/pointer.h"
#include "util/container.h"
@ -37,89 +37,6 @@ class NetworkPacket;
namespace con
{
/*
Exceptions
*/
class NotFoundException : public BaseException
{
public:
NotFoundException(const char *s):
BaseException(s)
{}
};
class PeerNotFoundException : public BaseException
{
public:
PeerNotFoundException(const char *s):
BaseException(s)
{}
};
class ConnectionException : public BaseException
{
public:
ConnectionException(const char *s):
BaseException(s)
{}
};
class ConnectionBindFailed : public BaseException
{
public:
ConnectionBindFailed(const char *s):
BaseException(s)
{}
};
class InvalidIncomingDataException : public BaseException
{
public:
InvalidIncomingDataException(const char *s):
BaseException(s)
{}
};
class InvalidOutgoingDataException : public BaseException
{
public:
InvalidOutgoingDataException(const char *s):
BaseException(s)
{}
};
class NoIncomingDataException : public BaseException
{
public:
NoIncomingDataException(const char *s):
BaseException(s)
{}
};
class ProcessedSilentlyException : public BaseException
{
public:
ProcessedSilentlyException(const char *s):
BaseException(s)
{}
};
class ProcessedQueued : public BaseException
{
public:
ProcessedQueued(const char *s):
BaseException(s)
{}
};
class IncomingDataCorruption : public BaseException
{
public:
IncomingDataCorruption(const char *s):
BaseException(s)
{}
};
typedef enum MTProtocols {
MTP_PRIMARY,
MTP_UDP,
@ -566,41 +483,6 @@ private:
class Peer;
enum PeerChangeType
{
PEER_ADDED,
PEER_REMOVED
};
struct PeerChange
{
PeerChange(PeerChangeType t, u16 _peer_id, bool _timeout):
type(t), peer_id(_peer_id), timeout(_timeout) {}
PeerChange() = delete;
PeerChangeType type;
u16 peer_id;
bool timeout;
};
class PeerHandler
{
public:
PeerHandler() = default;
virtual ~PeerHandler() = default;
/*
This is called after the Peer has been inserted into the
Connection's peer container.
*/
virtual void peerAdded(Peer *peer) = 0;
/*
This is called before the Peer has been removed from the
Connection's peer container.
*/
virtual void deletingPeer(Peer *peer, bool timeout) = 0;
};
class PeerHelper
{
public:
@ -620,15 +502,6 @@ private:
class Connection;
typedef enum {
MIN_RTT,
MAX_RTT,
AVG_RTT,
MIN_JITTER,
MAX_JITTER,
AVG_JITTER
} rtt_stat_type;
typedef enum {
CUR_DL_RATE,
AVG_DL_RATE,
@ -974,6 +847,8 @@ private:
Connection *m_connection = nullptr;
};
class PeerHandler;
class Connection
{
public:

106
src/network/networkexceptions.h Normal file
View file

@ -0,0 +1,106 @@
/*
Minetest
Copyright (C) 2013-2017 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 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 Lesser General Public License for more details.
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.
*/
#pragma once
#include "exceptions.h"
namespace con
{
/*
Exceptions
*/
class NotFoundException : public BaseException
{
public:
NotFoundException(const char *s) : BaseException(s) {}
};
class PeerNotFoundException : public BaseException
{
public:
PeerNotFoundException(const char *s) : BaseException(s) {}
};
class ConnectionException : public BaseException
{
public:
ConnectionException(const char *s) : BaseException(s) {}
};
class ConnectionBindFailed : public BaseException
{
public:
ConnectionBindFailed(const char *s) : BaseException(s) {}
};
class InvalidIncomingDataException : public BaseException
{
public:
InvalidIncomingDataException(const char *s) : BaseException(s) {}
};
class InvalidOutgoingDataException : public BaseException
{
public:
InvalidOutgoingDataException(const char *s) : BaseException(s) {}
};
class NoIncomingDataException : public BaseException
{
public:
NoIncomingDataException(const char *s) : BaseException(s) {}
};
class ProcessedSilentlyException : public BaseException
{
public:
ProcessedSilentlyException(const char *s) : BaseException(s) {}
};
class ProcessedQueued : public BaseException
{
public:
ProcessedQueued(const char *s) : BaseException(s) {}
};
class IncomingDataCorruption : public BaseException
{
public:
IncomingDataCorruption(const char *s) : BaseException(s) {}
};
}
class SocketException : public BaseException
{
public:
SocketException(const std::string &s) : BaseException(s) {}
};
class ResolveError : public BaseException
{
public:
ResolveError(const std::string &s) : BaseException(s) {}
};
class SendFailedException : public BaseException
{
public:
SendFailedException(const std::string &s) : BaseException(s) {}
};

2
src/network/networkpacket.cpp
View file

@ -19,7 +19,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "networkpacket.h"
#include <sstream>
#include "exceptions.h"
#include "networkexceptions.h"
#include "util/serialize.h"
NetworkPacket::NetworkPacket(u16 command, u32 datasize, u16 peer_id):

151
src/network/networkpacket.h
View file

@ -28,109 +28,112 @@ class NetworkPacket
{
public:
NetworkPacket(u16 command, u32 datasize, u16 peer_id);
NetworkPacket(u16 command, u32 datasize);
NetworkPacket() = default;
NetworkPacket(u16 command, u32 datasize, u16 peer_id);
NetworkPacket(u16 command, u32 datasize);
NetworkPacket() = default;
~NetworkPacket();
~NetworkPacket();
void putRawPacket(u8 *data, u32 datasize, u16 peer_id);
void putRawPacket(u8 *data, u32 datasize, u16 peer_id);
// Getters
u32 getSize() { return m_datasize; }
u16 getPeerId() { return m_peer_id; }
u16 getCommand() { return m_command; }
const u32 getRemainingBytes() const { return m_datasize - m_read_offset; }
const char* getRemainingString() { return getString(m_read_offset); }
// Getters
u32 getSize() { return m_datasize; }
u16 getPeerId() { return m_peer_id; }
u16 getCommand() { return m_command; }
const u32 getRemainingBytes() const { return m_datasize - m_read_offset; }
const char *getRemainingString() { return getString(m_read_offset); }
// Returns a c-string without copying.
// A better name for this would be getRawString()
const char* getString(u32 from_offset);
// major difference to putCString(): doesn't write len into the buffer
void putRawString(const char* src, u32 len);
void putRawString(const std::string &src)
{ putRawString(src.c_str(), src.size()); }
// Returns a c-string without copying.
// A better name for this would be getRawString()
const char *getString(u32 from_offset);
// major difference to putCString(): doesn't write len into the buffer
void putRawString(const char *src, u32 len);
void putRawString(const std::string &src)
{
putRawString(src.c_str(), src.size());
}
NetworkPacket& operator>>(std::string& dst);
NetworkPacket& operator<<(const std::string &src);
NetworkPacket &operator>>(std::string &dst);
NetworkPacket &operator<<(const std::string &src);
void putLongString(const std::string &src);
void putLongString(const std::string &src);
NetworkPacket& operator>>(std::wstring& dst);
NetworkPacket& operator<<(const std::wstring &src);
NetworkPacket &operator>>(std::wstring &dst);
NetworkPacket &operator<<(const std::wstring &src);
std::string readLongString();
std::string readLongString();
char getChar(u32 offset);
NetworkPacket& operator>>(char& dst);
NetworkPacket& operator<<(char src);
char getChar(u32 offset);
NetworkPacket &operator>>(char &dst);
NetworkPacket &operator<<(char src);
NetworkPacket& operator>>(bool& dst);
NetworkPacket& operator<<(bool src);
NetworkPacket &operator>>(bool &dst);
NetworkPacket &operator<<(bool src);
u8 getU8(u32 offset);
u8 getU8(u32 offset);
NetworkPacket& operator>>(u8& dst);
NetworkPacket& operator<<(u8 src);
NetworkPacket &operator>>(u8 &dst);
NetworkPacket &operator<<(u8 src);
u8* getU8Ptr(u32 offset);
u8 *getU8Ptr(u32 offset);
u16 getU16(u32 from_offset);
NetworkPacket& operator>>(u16& dst);
NetworkPacket& operator<<(u16 src);
u16 getU16(u32 from_offset);
NetworkPacket &operator>>(u16 &dst);
NetworkPacket &operator<<(u16 src);
NetworkPacket& operator>>(u32& dst);
NetworkPacket& operator<<(u32 src);
NetworkPacket &operator>>(u32 &dst);
NetworkPacket &operator<<(u32 src);
NetworkPacket& operator>>(u64& dst);
NetworkPacket& operator<<(u64 src);
NetworkPacket &operator>>(u64 &dst);
NetworkPacket &operator<<(u64 src);
NetworkPacket& operator>>(std::time_t& dst);
NetworkPacket& operator<<(std::time_t src);
NetworkPacket &operator>>(std::time_t &dst);
NetworkPacket &operator<<(std::time_t src);
NetworkPacket& operator>>(float& dst);
NetworkPacket& operator<<(float src);
NetworkPacket &operator>>(float &dst);
NetworkPacket &operator<<(float src);
NetworkPacket& operator>>(v2f& dst);
NetworkPacket& operator<<(v2f src);
NetworkPacket &operator>>(v2f &dst);
NetworkPacket &operator<<(v2f src);
NetworkPacket& operator>>(v3f& dst);
NetworkPacket& operator<<(v3f src);
NetworkPacket &operator>>(v3f &dst);
NetworkPacket &operator<<(v3f src);
NetworkPacket& operator>>(s16& dst);
NetworkPacket& operator<<(s16 src);
NetworkPacket &operator>>(s16 &dst);
NetworkPacket &operator<<(s16 src);
NetworkPacket& operator>>(s32& dst);
NetworkPacket& operator<<(s32 src);
NetworkPacket &operator>>(s32 &dst);
NetworkPacket &operator<<(s32 src);
NetworkPacket& operator>>(v2s32& dst);
NetworkPacket& operator<<(v2s32 src);
NetworkPacket &operator>>(v2s32 &dst);
NetworkPacket &operator<<(v2s32 src);
NetworkPacket& operator>>(v3s16& dst);
NetworkPacket& operator<<(v3s16 src);
NetworkPacket &operator>>(v3s16 &dst);
NetworkPacket &operator<<(v3s16 src);
NetworkPacket& operator>>(v3s32& dst);
NetworkPacket& operator<<(v3s32 src);
NetworkPacket &operator>>(v3s32 &dst);
NetworkPacket &operator<<(v3s32 src);
NetworkPacket& operator>>(video::SColor& dst);
NetworkPacket& operator<<(video::SColor src);
NetworkPacket &operator>>(video::SColor &dst);
NetworkPacket &operator<<(video::SColor src);
// Temp, we remove SharedBuffer when migration finished
Buffer<u8> oldForgePacket();
// Temp, we remove SharedBuffer when migration finished
Buffer<u8> oldForgePacket();
private:
void checkReadOffset(u32 from_offset, u32 field_size);
void checkReadOffset(u32 from_offset, u32 field_size);
inline void checkDataSize(u32 field_size)
{
if (m_read_offset + field_size > m_datasize) {
m_datasize = m_read_offset + field_size;
m_data.resize(m_datasize);
}
inline void checkDataSize(u32 field_size)
{
if (m_read_offset + field_size > m_datasize) {
m_datasize = m_read_offset + field_size;
m_data.resize(m_datasize);
}
}
std::vector<u8> m_data;
u32 m_datasize = 0;
u32 m_read_offset = 0;
u16 m_command = 0;
u16 m_peer_id = 0;
std::vector<u8> m_data;
u32 m_datasize = 0;
u32 m_read_offset = 0;
u16 m_command = 0;
u16 m_peer_id = 0;
};

73
src/network/peerhandler.h Normal file
View file

@ -0,0 +1,73 @@
/*
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 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 Lesser General Public License for more details.
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.
*/
#pragma once
namespace con
{
typedef enum {
MIN_RTT,
MAX_RTT,
AVG_RTT,
MIN_JITTER,
MAX_JITTER,
AVG_JITTER
} rtt_stat_type;
class Peer;
class PeerHandler
{
public:
PeerHandler() = default;
virtual ~PeerHandler() = default;
/*
This is called after the Peer has been inserted into the
Connection's peer container.
*/
virtual void peerAdded(Peer *peer) = 0;
/*
This is called before the Peer has been removed from the
Connection's peer container.
*/
virtual void deletingPeer(Peer *peer, bool timeout) = 0;
};
enum PeerChangeType
{
PEER_ADDED,
PEER_REMOVED
};
struct PeerChange
{
PeerChange(PeerChangeType t, u16 _peer_id, bool _timeout)
: type(t), peer_id(_peer_id), timeout(_timeout)
{
}
PeerChange() = delete;
PeerChangeType type;
u16 peer_id;
bool timeout;
};
}

39
src/network/serverpackethandler.cpp
View file

@ -30,6 +30,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "settings.h"
#include "tool.h"
#include "version.h"
#include "network/connection.h"
#include "network/networkprotocol.h"
#include "network/serveropcodes.h"
#include "util/auth.h"
@ -686,7 +687,7 @@ void Server::handleCommand_ClientReady(NetworkPacket* pkt)
actionstream
<< "TOSERVER_CLIENT_READY stage 2 client init failed for peer_id: "
<< peer_id << std::endl;
m_con.DisconnectPeer(peer_id);
m_con->DisconnectPeer(peer_id);
return;
}
@ -695,7 +696,7 @@ void Server::handleCommand_ClientReady(NetworkPacket* pkt)
errorstream
<< "TOSERVER_CLIENT_READY client sent inconsistent data, disconnecting peer_id: "
<< peer_id << std::endl;
m_con.DisconnectPeer(peer_id);
m_con->DisconnectPeer(peer_id);
return;
}
@ -830,7 +831,7 @@ void Server::handleCommand_PlayerPos(NetworkPacket* pkt)
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
m_con->DisconnectPeer(pkt->getPeerId());
return;
}
@ -839,7 +840,7 @@ void Server::handleCommand_PlayerPos(NetworkPacket* pkt)
errorstream << "Server::ProcessData(): Canceling: "
"No player object for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
m_con->DisconnectPeer(pkt->getPeerId());
return;
}
@ -891,7 +892,7 @@ void Server::handleCommand_InventoryAction(NetworkPacket* pkt)
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
m_con->DisconnectPeer(pkt->getPeerId());
return;
}
@ -900,7 +901,7 @@ void Server::handleCommand_InventoryAction(NetworkPacket* pkt)
errorstream << "Server::ProcessData(): Canceling: "
"No player object for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
m_con->DisconnectPeer(pkt->getPeerId());
return;
}
@ -1072,7 +1073,7 @@ void Server::handleCommand_ChatMessage(NetworkPacket* pkt)
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
m_con->DisconnectPeer(pkt->getPeerId());
return;
}
@ -1100,7 +1101,7 @@ void Server::handleCommand_Damage(NetworkPacket* pkt)
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
m_con->DisconnectPeer(pkt->getPeerId());
return;
}
@ -1109,7 +1110,7 @@ void Server::handleCommand_Damage(NetworkPacket* pkt)
errorstream << "Server::ProcessData(): Canceling: "
"No player object for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
m_con->DisconnectPeer(pkt->getPeerId());
return;
}
@ -1166,7 +1167,7 @@ void Server::handleCommand_Password(NetworkPacket* pkt)
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
m_con->DisconnectPeer(pkt->getPeerId());
return;
}
@ -1219,7 +1220,7 @@ void Server::handleCommand_PlayerItem(NetworkPacket* pkt)
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
m_con->DisconnectPeer(pkt->getPeerId());
return;
}
@ -1228,7 +1229,7 @@ void Server::handleCommand_PlayerItem(NetworkPacket* pkt)
errorstream << "Server::ProcessData(): Canceling: "
"No player object for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
m_con->DisconnectPeer(pkt->getPeerId());
return;
}
@ -1246,7 +1247,7 @@ void Server::handleCommand_Respawn(NetworkPacket* pkt)
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
m_con->DisconnectPeer(pkt->getPeerId());
return;
}
@ -1299,7 +1300,7 @@ void Server::handleCommand_Interact(NetworkPacket* pkt)
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
m_con->DisconnectPeer(pkt->getPeerId());
return;
}
@ -1308,7 +1309,7 @@ void Server::handleCommand_Interact(NetworkPacket* pkt)
errorstream << "Server::ProcessData(): Canceling: "
"No player object for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
m_con->DisconnectPeer(pkt->getPeerId());
return;
}
@ -1738,7 +1739,7 @@ void Server::handleCommand_NodeMetaFields(NetworkPacket* pkt)
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
m_con->DisconnectPeer(pkt->getPeerId());
return;
}
@ -1747,7 +1748,7 @@ void Server::handleCommand_NodeMetaFields(NetworkPacket* pkt)
errorstream << "Server::ProcessData(): Canceling: "
"No player object for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
m_con->DisconnectPeer(pkt->getPeerId());
return;
}
@ -1789,7 +1790,7 @@ void Server::handleCommand_InventoryFields(NetworkPacket* pkt)
errorstream << "Server::ProcessData(): Canceling: "
"No player for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
m_con->DisconnectPeer(pkt->getPeerId());
return;
}
@ -1798,7 +1799,7 @@ void Server::handleCommand_InventoryFields(NetworkPacket* pkt)
errorstream << "Server::ProcessData(): Canceling: "
"No player object for peer_id=" << pkt->getPeerId()
<< " disconnecting peer!" << std::endl;
m_con.DisconnectPeer(pkt->getPeerId());
m_con->DisconnectPeer(pkt->getPeerId());
return;
}

363
src/network/socket.cpp Normal file
View file

@ -0,0 +1,363 @@
/*
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 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 Lesser General Public License for more details.
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"
#include <cstdio>
#include <iostream>
#include <cstdlib>
#include <cstring>
#include <cerrno>
#include <sstream>
#include <iomanip>
#include "util/string.h"
#include "util/numeric.h"
#include "constants.h"
#include "debug.h"
#include "settings.h"
#include "log.h"
#ifdef _WIN32
// 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>
#define LAST_SOCKET_ERR() WSAGetLastError()
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>
#define LAST_SOCKET_ERR() (errno)
typedef int socket_t;
#endif
// Set to true to enable verbose debug output
bool socket_enable_debug_output = false; // yuck
static 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");
#endif
g_sockets_initialized = true;
}
void sockets_cleanup()
{
#ifdef _WIN32
// On Windows, cleanup sockets after use
WSACleanup();
#endif
}
/*
UDPSocket
*/
UDPSocket::UDPSocket(bool ipv6)
{
init(ipv6, false);
}
bool UDPSocket::init(bool ipv6, bool noExceptions)
{
if (!g_sockets_initialized) {
dstream << "Sockets not initialized" << std::endl;
return false;
}
// 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) {
dstream << "UDPSocket(" << (int)m_handle
<< ")::UDPSocket(): ipv6 = " << (ipv6 ? "true" : "false")
<< std::endl;
}
if (m_handle <= 0) {
if (noExceptions) {
return false;
}
throw SocketException(std::string("Failed to create socket: error ") +
itos(LAST_SOCKET_ERR()));
}
setTimeoutMs(0);
return true;
}
UDPSocket::~UDPSocket()
{
if (socket_enable_debug_output) {
dstream << "UDPSocket( " << (int)m_handle << ")::~UDPSocket()"
<< std::endl;
}
#ifdef _WIN32
closesocket(m_handle);
#else
close(m_handle);
#endif
}
void UDPSocket::Bind(Address addr)
{
if (socket_enable_debug_output) {
dstream << "UDPSocket(" << (int)m_handle
<< ")::Bind(): " << addr.serializeString() << ":"
<< addr.getPort() << std::endl;
}
if (addr.getFamily() != m_addr_family) {
static const char *errmsg =
"Socket and bind address families do not match";
errorstream << "Bind failed: " << errmsg << std::endl;
throw SocketException(errmsg);
}
if (m_addr_family == AF_INET6) {
struct sockaddr_in6 address;
memset(&address, 0, sizeof(address));
address = addr.getAddress6();
address.sin6_family = AF_INET6;
address.sin6_port = htons(addr.getPort());
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;
memset(&address, 0, sizeof(address));
address = addr.getAddress();
address.sin_family = AF_INET;
address.sin_port = htons(addr.getPort());
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; // for INTERNET_SIMULATOR
if (INTERNET_SIMULATOR)
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)
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;
}

70
src/network/socket.h Normal file
View file

@ -0,0 +1,70 @@
/*
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 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 Lesser General Public License for more details.
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.
*/
#pragma once
#ifdef _WIN32
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0501
#endif
#include <windows.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#else
#include <sys/socket.h>
#include <netinet/in.h>
#endif
#include <ostream>
#include <cstring>
#include "address.h"
#include "irrlichttypes.h"
#include "networkexceptions.h"
extern bool socket_enable_debug_output;
void sockets_init();
void sockets_cleanup();
class UDPSocket
{
public:
UDPSocket() = default;
UDPSocket(bool ipv6);
~UDPSocket();
void Bind(Address addr);
bool init(bool ipv6, bool noExceptions = false);
// void Close();
// bool IsOpen();
void Send(const Address &destination, const void *data, int size);
// Returns -1 if there is no data
int Receive(Address &sender, void *data, int size);
int GetHandle(); // For debugging purposes only
void setTimeoutMs(int timeout_ms);
// Returns true if there is data, false if timeout occurred
bool WaitData(int timeout_ms);
private:
int m_handle;
int m_timeout_ms;
int m_addr_family;
};