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enet.h
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/**
* include/enet.h - a Single-Header auto-generated variant of enet.h library.
*
* Usage:
* #define ENET_IMPLEMENTATION exactly in ONE source file right BEFORE including the library, like:
*
* #define ENET_IMPLEMENTATION
* #include <enet.h>
*
* License:
* The MIT License (MIT)
*
* Copyright (c) 2002-2016 Lee Salzman
* Copyright (c) 2017-2018 Vladyslav Hrytsenko, Dominik Madarász
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef ENET_INCLUDE_H
#define ENET_INCLUDE_H
#include <stdlib.h>
#include <stdbool.h>
#include <stdint.h>
#include <time.h>
#define ENET_VERSION_MAJOR 2
#define ENET_VERSION_MINOR 2
#define ENET_VERSION_PATCH 0
#define ENET_VERSION_CREATE(major, minor, patch) (((major)<<16) | ((minor)<<8) | (patch))
#define ENET_VERSION_GET_MAJOR(version) (((version)>>16)&0xFF)
#define ENET_VERSION_GET_MINOR(version) (((version)>>8)&0xFF)
#define ENET_VERSION_GET_PATCH(version) ((version)&0xFF)
#define ENET_VERSION ENET_VERSION_CREATE(ENET_VERSION_MAJOR, ENET_VERSION_MINOR, ENET_VERSION_PATCH)
#define ENET_TIME_OVERFLOW 86400000
#define ENET_TIME_LESS(a, b) ((a) - (b) >= ENET_TIME_OVERFLOW)
#define ENET_TIME_GREATER(a, b) ((b) - (a) >= ENET_TIME_OVERFLOW)
#define ENET_TIME_LESS_EQUAL(a, b) (! ENET_TIME_GREATER (a, b))
#define ENET_TIME_GREATER_EQUAL(a, b) (! ENET_TIME_LESS (a, b))
#define ENET_TIME_DIFFERENCE(a, b) ((a) - (b) >= ENET_TIME_OVERFLOW ? (b) - (a) : (a) - (b))
// =======================================================================//
// !
// ! System differences
// !
// =======================================================================//
#if defined(_WIN32)
#if defined(_MSC_VER) && defined(ENET_IMPLEMENTATION)
#pragma warning (disable: 4267) // size_t to int conversion
#pragma warning (disable: 4244) // 64bit to 32bit int
#pragma warning (disable: 4018) // signed/unsigned mismatch
#pragma warning (disable: 4146) // unary minus operator applied to unsigned type
#endif
#ifndef ENET_NO_PRAGMA_LINK
#pragma comment(lib, "ws2_32.lib")
#pragma comment(lib, "winmm.lib")
#endif
#if _MSC_VER >= 1910
/* It looks like there were changes as of Visual Studio 2017 and there are no 32/64 bit
versions of _InterlockedExchange[operation], only InterlockedExchange[operation]
(without leading underscore), so we have to distinguish between compiler versions */
#define NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
#endif
#ifdef __GNUC__
#if (_WIN32_WINNT < 0x0501)
#undef _WIN32_WINNT
#define _WIN32_WINNT 0x0501
#endif
#endif
#include <winsock2.h>
#include <ws2tcpip.h>
#include <mmsystem.h>
#include <intrin.h>
#if defined(_WIN32) && defined(_MSC_VER)
#if _MSC_VER < 1900
typedef struct timespec {
long tv_sec;
long tv_nsec;
};
#endif
#define CLOCK_MONOTONIC 0
#endif
typedef SOCKET ENetSocket;
#define ENET_SOCKET_NULL INVALID_SOCKET
#define ENET_HOST_TO_NET_16(value) (htons(value))
#define ENET_HOST_TO_NET_32(value) (htonl(value))
#define ENET_NET_TO_HOST_16(value) (ntohs(value))
#define ENET_NET_TO_HOST_32(value) (ntohl(value))
typedef struct {
size_t dataLength;
void * data;
} ENetBuffer;
#define ENET_CALLBACK __cdecl
#ifdef ENET_DLL
#ifdef ENET_IMPLEMENTATION
#define ENET_API __declspec( dllexport )
#else
#define ENET_API __declspec( dllimport )
#endif // ENET_IMPLEMENTATION
#else
#define ENET_API extern
#endif // ENET_DLL
typedef fd_set ENetSocketSet;
#define ENET_SOCKETSET_EMPTY(sockset) FD_ZERO(&(sockset))
#define ENET_SOCKETSET_ADD(sockset, socket) FD_SET(socket, &(sockset))
#define ENET_SOCKETSET_REMOVE(sockset, socket) FD_CLR(socket, &(sockset))
#define ENET_SOCKETSET_CHECK(sockset, socket) FD_ISSET(socket, &(sockset))
#else
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <poll.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <netdb.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#ifdef __APPLE__
#include <mach/clock.h>
#include <mach/mach.h>
#include <Availability.h>
#endif
#ifndef MSG_NOSIGNAL
#define MSG_NOSIGNAL 0
#endif
#ifdef MSG_MAXIOVLEN
#define ENET_BUFFER_MAXIMUM MSG_MAXIOVLEN
#endif
typedef int ENetSocket;
#define ENET_SOCKET_NULL -1
#define ENET_HOST_TO_NET_16(value) (htons(value)) /**< macro that converts host to net byte-order of a 16-bit value */
#define ENET_HOST_TO_NET_32(value) (htonl(value)) /**< macro that converts host to net byte-order of a 32-bit value */
#define ENET_NET_TO_HOST_16(value) (ntohs(value)) /**< macro that converts net to host byte-order of a 16-bit value */
#define ENET_NET_TO_HOST_32(value) (ntohl(value)) /**< macro that converts net to host byte-order of a 32-bit value */
typedef struct {
void * data;
size_t dataLength;
} ENetBuffer;
#define ENET_CALLBACK
#define ENET_API extern
typedef fd_set ENetSocketSet;
#define ENET_SOCKETSET_EMPTY(sockset) FD_ZERO(&(sockset))
#define ENET_SOCKETSET_ADD(sockset, socket) FD_SET(socket, &(sockset))
#define ENET_SOCKETSET_REMOVE(sockset, socket) FD_CLR(socket, &(sockset))
#define ENET_SOCKETSET_CHECK(sockset, socket) FD_ISSET(socket, &(sockset))
#endif
#ifndef ENET_BUFFER_MAXIMUM
#define ENET_BUFFER_MAXIMUM (1 + 2 * ENET_PROTOCOL_MAXIMUM_PACKET_COMMANDS)
#endif
#define ENET_MAX(x, y) ((x) > (y) ? (x) : (y))
#define ENET_MIN(x, y) ((x) < (y) ? (x) : (y))
#define ENET_IPV6 1
#define ENET_HOST_ANY in6addr_any
#define ENET_HOST_BROADCAST 0xFFFFFFFFU
#define ENET_PORT_ANY 0
#ifdef __cplusplus
extern "C" {
#endif
// =======================================================================//
// !
// ! Basic stuff
// !
// =======================================================================//
typedef uint8_t enet_uint8; /**< unsigned 8-bit type */
typedef uint16_t enet_uint16; /**< unsigned 16-bit type */
typedef uint32_t enet_uint32; /**< unsigned 32-bit type */
typedef uint64_t enet_uint64; /**< unsigned 64-bit type */
typedef enet_uint32 ENetVersion;
typedef struct _ENetCallbacks {
void *(ENET_CALLBACK *malloc) (size_t size);
void (ENET_CALLBACK *free) (void *memory);
void (ENET_CALLBACK *no_memory) (void);
} ENetCallbacks;
extern void *enet_malloc(size_t);
extern void enet_free(void *);
// =======================================================================//
// !
// ! List
// !
// =======================================================================//
typedef struct _ENetListNode {
struct _ENetListNode *next;
struct _ENetListNode *previous;
} ENetListNode;
typedef ENetListNode *ENetListIterator;
typedef struct _ENetList {
ENetListNode sentinel;
} ENetList;
extern ENetListIterator enet_list_insert(ENetListIterator, void *);
extern ENetListIterator enet_list_move(ENetListIterator, void *, void *);
extern void *enet_list_remove(ENetListIterator);
extern void enet_list_clear(ENetList *);
extern size_t enet_list_size(ENetList *);
#define enet_list_begin(list) ((list)->sentinel.next)
#define enet_list_end(list) (&(list)->sentinel)
#define enet_list_empty(list) (enet_list_begin(list) == enet_list_end(list))
#define enet_list_next(iterator) ((iterator)->next)
#define enet_list_previous(iterator) ((iterator)->previous)
#define enet_list_front(list) ((void *)(list)->sentinel.next)
#define enet_list_back(list) ((void *)(list)->sentinel.previous)
// =======================================================================//
// !
// ! Protocol
// !
// =======================================================================//
enum {
ENET_PROTOCOL_MINIMUM_MTU = 576,
ENET_PROTOCOL_MAXIMUM_MTU = 4096,
ENET_PROTOCOL_MAXIMUM_PACKET_COMMANDS = 32,
ENET_PROTOCOL_MINIMUM_WINDOW_SIZE = 4096,
ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE = 65536,
ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT = 1,
ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT = 255,
ENET_PROTOCOL_MAXIMUM_PEER_ID = 0xFFF,
ENET_PROTOCOL_MAXIMUM_FRAGMENT_COUNT = 1024 * 1024
};
typedef enum _ENetProtocolCommand {
ENET_PROTOCOL_COMMAND_NONE = 0,
ENET_PROTOCOL_COMMAND_ACKNOWLEDGE = 1,
ENET_PROTOCOL_COMMAND_CONNECT = 2,
ENET_PROTOCOL_COMMAND_VERIFY_CONNECT = 3,
ENET_PROTOCOL_COMMAND_DISCONNECT = 4,
ENET_PROTOCOL_COMMAND_PING = 5,
ENET_PROTOCOL_COMMAND_SEND_RELIABLE = 6,
ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE = 7,
ENET_PROTOCOL_COMMAND_SEND_FRAGMENT = 8,
ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED = 9,
ENET_PROTOCOL_COMMAND_BANDWIDTH_LIMIT = 10,
ENET_PROTOCOL_COMMAND_THROTTLE_CONFIGURE = 11,
ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE_FRAGMENT = 12,
ENET_PROTOCOL_COMMAND_COUNT = 13,
ENET_PROTOCOL_COMMAND_MASK = 0x0F
} ENetProtocolCommand;
typedef enum _ENetProtocolFlag {
ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE = (1 << 7),
ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED = (1 << 6),
ENET_PROTOCOL_HEADER_FLAG_COMPRESSED = (1 << 14),
ENET_PROTOCOL_HEADER_FLAG_SENT_TIME = (1 << 15),
ENET_PROTOCOL_HEADER_FLAG_MASK = ENET_PROTOCOL_HEADER_FLAG_COMPRESSED | ENET_PROTOCOL_HEADER_FLAG_SENT_TIME,
ENET_PROTOCOL_HEADER_SESSION_MASK = (3 << 12),
ENET_PROTOCOL_HEADER_SESSION_SHIFT = 12
} ENetProtocolFlag;
#ifdef _MSC_VER
#pragma pack(push, 1)
#define ENET_PACKED
#elif defined(__GNUC__) || defined(__clang__)
#define ENET_PACKED __attribute__ ((packed))
#else
#define ENET_PACKED
#endif
typedef struct _ENetProtocolHeader {
enet_uint16 peerID;
enet_uint16 sentTime;
} ENET_PACKED ENetProtocolHeader;
typedef struct _ENetProtocolCommandHeader {
enet_uint8 command;
enet_uint8 channelID;
enet_uint16 reliableSequenceNumber;
} ENET_PACKED ENetProtocolCommandHeader;
typedef struct _ENetProtocolAcknowledge {
ENetProtocolCommandHeader header;
enet_uint16 receivedReliableSequenceNumber;
enet_uint16 receivedSentTime;
} ENET_PACKED ENetProtocolAcknowledge;
typedef struct _ENetProtocolConnect {
ENetProtocolCommandHeader header;
enet_uint16 outgoingPeerID;
enet_uint8 incomingSessionID;
enet_uint8 outgoingSessionID;
enet_uint32 mtu;
enet_uint32 windowSize;
enet_uint32 channelCount;
enet_uint32 incomingBandwidth;
enet_uint32 outgoingBandwidth;
enet_uint32 packetThrottleInterval;
enet_uint32 packetThrottleAcceleration;
enet_uint32 packetThrottleDeceleration;
enet_uint32 connectID;
enet_uint32 data;
} ENET_PACKED ENetProtocolConnect;
typedef struct _ENetProtocolVerifyConnect {
ENetProtocolCommandHeader header;
enet_uint16 outgoingPeerID;
enet_uint8 incomingSessionID;
enet_uint8 outgoingSessionID;
enet_uint32 mtu;
enet_uint32 windowSize;
enet_uint32 channelCount;
enet_uint32 incomingBandwidth;
enet_uint32 outgoingBandwidth;
enet_uint32 packetThrottleInterval;
enet_uint32 packetThrottleAcceleration;
enet_uint32 packetThrottleDeceleration;
enet_uint32 connectID;
} ENET_PACKED ENetProtocolVerifyConnect;
typedef struct _ENetProtocolBandwidthLimit {
ENetProtocolCommandHeader header;
enet_uint32 incomingBandwidth;
enet_uint32 outgoingBandwidth;
} ENET_PACKED ENetProtocolBandwidthLimit;
typedef struct _ENetProtocolThrottleConfigure {
ENetProtocolCommandHeader header;
enet_uint32 packetThrottleInterval;
enet_uint32 packetThrottleAcceleration;
enet_uint32 packetThrottleDeceleration;
} ENET_PACKED ENetProtocolThrottleConfigure;
typedef struct _ENetProtocolDisconnect {
ENetProtocolCommandHeader header;
enet_uint32 data;
} ENET_PACKED ENetProtocolDisconnect;
typedef struct _ENetProtocolPing {
ENetProtocolCommandHeader header;
} ENET_PACKED ENetProtocolPing;
typedef struct _ENetProtocolSendReliable {
ENetProtocolCommandHeader header;
enet_uint16 dataLength;
} ENET_PACKED ENetProtocolSendReliable;
typedef struct _ENetProtocolSendUnreliable {
ENetProtocolCommandHeader header;
enet_uint16 unreliableSequenceNumber;
enet_uint16 dataLength;
} ENET_PACKED ENetProtocolSendUnreliable;
typedef struct _ENetProtocolSendUnsequenced {
ENetProtocolCommandHeader header;
enet_uint16 unsequencedGroup;
enet_uint16 dataLength;
} ENET_PACKED ENetProtocolSendUnsequenced;
typedef struct _ENetProtocolSendFragment {
ENetProtocolCommandHeader header;
enet_uint16 startSequenceNumber;
enet_uint16 dataLength;
enet_uint32 fragmentCount;
enet_uint32 fragmentNumber;
enet_uint32 totalLength;
enet_uint32 fragmentOffset;
} ENET_PACKED ENetProtocolSendFragment;
typedef union _ENetProtocol {
ENetProtocolCommandHeader header;
ENetProtocolAcknowledge acknowledge;
ENetProtocolConnect connect;
ENetProtocolVerifyConnect verifyConnect;
ENetProtocolDisconnect disconnect;
ENetProtocolPing ping;
ENetProtocolSendReliable sendReliable;
ENetProtocolSendUnreliable sendUnreliable;
ENetProtocolSendUnsequenced sendUnsequenced;
ENetProtocolSendFragment sendFragment;
ENetProtocolBandwidthLimit bandwidthLimit;
ENetProtocolThrottleConfigure throttleConfigure;
} ENET_PACKED ENetProtocol;
#ifdef _MSC_VER
#pragma pack(pop)
#endif
// =======================================================================//
// !
// ! General ENet structs/enums
// !
// =======================================================================//
typedef enum _ENetSocketType {
ENET_SOCKET_TYPE_STREAM = 1,
ENET_SOCKET_TYPE_DATAGRAM = 2
} ENetSocketType;
typedef enum _ENetSocketWait {
ENET_SOCKET_WAIT_NONE = 0,
ENET_SOCKET_WAIT_SEND = (1 << 0),
ENET_SOCKET_WAIT_RECEIVE = (1 << 1),
ENET_SOCKET_WAIT_INTERRUPT = (1 << 2)
} ENetSocketWait;
typedef enum _ENetSocketOption {
ENET_SOCKOPT_NONBLOCK = 1,
ENET_SOCKOPT_BROADCAST = 2,
ENET_SOCKOPT_RCVBUF = 3,
ENET_SOCKOPT_SNDBUF = 4,
ENET_SOCKOPT_REUSEADDR = 5,
ENET_SOCKOPT_RCVTIMEO = 6,
ENET_SOCKOPT_SNDTIMEO = 7,
ENET_SOCKOPT_ERROR = 8,
ENET_SOCKOPT_NODELAY = 9,
ENET_SOCKOPT_IPV6_V6ONLY = 10,
} ENetSocketOption;
typedef enum _ENetSocketShutdown {
ENET_SOCKET_SHUTDOWN_READ = 0,
ENET_SOCKET_SHUTDOWN_WRITE = 1,
ENET_SOCKET_SHUTDOWN_READ_WRITE = 2
} ENetSocketShutdown;
/**
* Portable internet address structure.
*
* The host must be specified in network byte-order, and the port must be in host
* byte-order. The constant ENET_HOST_ANY may be used to specify the default
* server host. The constant ENET_HOST_BROADCAST may be used to specify the
* broadcast address (255.255.255.255). This makes sense for enet_host_connect,
* but not for enet_host_create. Once a server responds to a broadcast, the
* address is updated from ENET_HOST_BROADCAST to the server's actual IP address.
*/
typedef struct _ENetAddress {
struct in6_addr host;
enet_uint16 port;
enet_uint16 sin6_scope_id;
} ENetAddress;
#define in6_equal(in6_addr_a, in6_addr_b) (memcmp(&in6_addr_a, &in6_addr_b, sizeof(struct in6_addr)) == 0)
/**
* Packet flag bit constants.
*
* The host must be specified in network byte-order, and the port must be in
* host byte-order. The constant ENET_HOST_ANY may be used to specify the
* default server host.
*
* @sa ENetPacket
*/
typedef enum _ENetPacketFlag {
ENET_PACKET_FLAG_RELIABLE = (1 << 0), /** packet must be received by the target peer and resend attempts should be made until the packet is delivered */
ENET_PACKET_FLAG_UNSEQUENCED = (1 << 1), /** packet will not be sequenced with other packets not supported for reliable packets */
ENET_PACKET_FLAG_NO_ALLOCATE = (1 << 2), /** packet will not allocate data, and user must supply it instead */
ENET_PACKET_FLAG_UNRELIABLE_FRAGMENT = (1 << 3), /** packet will be fragmented using unreliable (instead of reliable) sends if it exceeds the MTU */
ENET_PACKET_FLAG_SENT = (1 << 8), /** whether the packet has been sent from all queues it has been entered into */
} ENetPacketFlag;
typedef void (ENET_CALLBACK *ENetPacketFreeCallback)(void *);
/**
* ENet packet structure.
*
* An ENet data packet that may be sent to or received from a peer. The shown
* fields should only be read and never modified. The data field contains the
* allocated data for the packet. The dataLength fields specifies the length
* of the allocated data. The flags field is either 0 (specifying no flags),
* or a bitwise-or of any combination of the following flags:
*
* ENET_PACKET_FLAG_RELIABLE - packet must be received by the target peer and resend attempts should be made until the packet is delivered
* ENET_PACKET_FLAG_UNSEQUENCED - packet will not be sequenced with other packets (not supported for reliable packets)
* ENET_PACKET_FLAG_NO_ALLOCATE - packet will not allocate data, and user must supply it instead
* ENET_PACKET_FLAG_UNRELIABLE_FRAGMENT - packet will be fragmented using unreliable (instead of reliable) sends if it exceeds the MTU
* ENET_PACKET_FLAG_SENT - whether the packet has been sent from all queues it has been entered into
* @sa ENetPacketFlag
*/
typedef struct _ENetPacket {
size_t referenceCount; /**< internal use only */
enet_uint32 flags; /**< bitwise-or of ENetPacketFlag constants */
enet_uint8 * data; /**< allocated data for packet */
size_t dataLength; /**< length of data */
ENetPacketFreeCallback freeCallback; /**< function to be called when the packet is no longer in use */
void * userData; /**< application private data, may be freely modified */
} ENetPacket;
typedef struct _ENetAcknowledgement {
ENetListNode acknowledgementList;
enet_uint32 sentTime;
ENetProtocol command;
} ENetAcknowledgement;
typedef struct _ENetOutgoingCommand {
ENetListNode outgoingCommandList;
enet_uint16 reliableSequenceNumber;
enet_uint16 unreliableSequenceNumber;
enet_uint32 sentTime;
enet_uint32 roundTripTimeout;
enet_uint32 roundTripTimeoutLimit;
enet_uint32 fragmentOffset;
enet_uint16 fragmentLength;
enet_uint16 sendAttempts;
ENetProtocol command;
ENetPacket * packet;
} ENetOutgoingCommand;
typedef struct _ENetIncomingCommand {
ENetListNode incomingCommandList;
enet_uint16 reliableSequenceNumber;
enet_uint16 unreliableSequenceNumber;
ENetProtocol command;
enet_uint32 fragmentCount;
enet_uint32 fragmentsRemaining;
enet_uint32 *fragments;
ENetPacket * packet;
} ENetIncomingCommand;
typedef enum _ENetPeerState {
ENET_PEER_STATE_DISCONNECTED = 0,
ENET_PEER_STATE_CONNECTING = 1,
ENET_PEER_STATE_ACKNOWLEDGING_CONNECT = 2,
ENET_PEER_STATE_CONNECTION_PENDING = 3,
ENET_PEER_STATE_CONNECTION_SUCCEEDED = 4,
ENET_PEER_STATE_CONNECTED = 5,
ENET_PEER_STATE_DISCONNECT_LATER = 6,
ENET_PEER_STATE_DISCONNECTING = 7,
ENET_PEER_STATE_ACKNOWLEDGING_DISCONNECT = 8,
ENET_PEER_STATE_ZOMBIE = 9
} ENetPeerState;
enum {
ENET_HOST_RECEIVE_BUFFER_SIZE = 256 * 1024,
ENET_HOST_SEND_BUFFER_SIZE = 256 * 1024,
ENET_HOST_BANDWIDTH_THROTTLE_INTERVAL = 1000,
ENET_HOST_DEFAULT_MTU = 1400,
ENET_HOST_DEFAULT_MAXIMUM_PACKET_SIZE = 32 * 1024 * 1024,
ENET_HOST_DEFAULT_MAXIMUM_WAITING_DATA = 32 * 1024 * 1024,
ENET_PEER_DEFAULT_ROUND_TRIP_TIME = 500,
ENET_PEER_DEFAULT_PACKET_THROTTLE = 32,
ENET_PEER_PACKET_THROTTLE_SCALE = 32,
ENET_PEER_PACKET_THROTTLE_COUNTER = 7,
ENET_PEER_PACKET_THROTTLE_ACCELERATION = 2,
ENET_PEER_PACKET_THROTTLE_DECELERATION = 2,
ENET_PEER_PACKET_THROTTLE_INTERVAL = 5000,
ENET_PEER_PACKET_LOSS_SCALE = (1 << 16),
ENET_PEER_PACKET_LOSS_INTERVAL = 10000,
ENET_PEER_WINDOW_SIZE_SCALE = 64 * 1024,
ENET_PEER_TIMEOUT_LIMIT = 32,
ENET_PEER_TIMEOUT_MINIMUM = 5000,
ENET_PEER_TIMEOUT_MAXIMUM = 30000,
ENET_PEER_PING_INTERVAL = 500,
ENET_PEER_UNSEQUENCED_WINDOWS = 64,
ENET_PEER_UNSEQUENCED_WINDOW_SIZE = 1024,
ENET_PEER_FREE_UNSEQUENCED_WINDOWS = 32,
ENET_PEER_RELIABLE_WINDOWS = 16,
ENET_PEER_RELIABLE_WINDOW_SIZE = 0x1000,
ENET_PEER_FREE_RELIABLE_WINDOWS = 8
};
typedef struct _ENetChannel {
enet_uint16 outgoingReliableSequenceNumber;
enet_uint16 outgoingUnreliableSequenceNumber;
enet_uint16 usedReliableWindows;
enet_uint16 reliableWindows[ENET_PEER_RELIABLE_WINDOWS];
enet_uint16 incomingReliableSequenceNumber;
enet_uint16 incomingUnreliableSequenceNumber;
ENetList incomingReliableCommands;
ENetList incomingUnreliableCommands;
} ENetChannel;
/**
* An ENet peer which data packets may be sent or received from.
*
* No fields should be modified unless otherwise specified.
*/
typedef struct _ENetPeer {
ENetListNode dispatchList;
struct _ENetHost *host;
enet_uint16 outgoingPeerID;
enet_uint16 incomingPeerID;
enet_uint32 connectID;
enet_uint8 outgoingSessionID;
enet_uint8 incomingSessionID;
ENetAddress address; /**< Internet address of the peer */
void * data; /**< Application private data, may be freely modified */
ENetPeerState state;
ENetChannel * channels;
size_t channelCount; /**< Number of channels allocated for communication with peer */
enet_uint32 incomingBandwidth; /**< Downstream bandwidth of the client in bytes/second */
enet_uint32 outgoingBandwidth; /**< Upstream bandwidth of the client in bytes/second */
enet_uint32 incomingBandwidthThrottleEpoch;
enet_uint32 outgoingBandwidthThrottleEpoch;
enet_uint32 incomingDataTotal;
enet_uint64 totalDataReceived;
enet_uint32 outgoingDataTotal;
enet_uint64 totalDataSent;
enet_uint32 lastSendTime;
enet_uint32 lastReceiveTime;
enet_uint32 nextTimeout;
enet_uint32 earliestTimeout;
enet_uint32 packetLossEpoch;
enet_uint32 packetsSent;
enet_uint64 totalPacketsSent; /**< total number of packets sent during a session */
enet_uint32 packetsLost;
enet_uint32 totalPacketsLost; /**< total number of packets lost during a session */
enet_uint32 packetLoss; /**< mean packet loss of reliable packets as a ratio with respect to the constant ENET_PEER_PACKET_LOSS_SCALE */
enet_uint32 packetLossVariance;
enet_uint32 packetThrottle;
enet_uint32 packetThrottleLimit;
enet_uint32 packetThrottleCounter;
enet_uint32 packetThrottleEpoch;
enet_uint32 packetThrottleAcceleration;
enet_uint32 packetThrottleDeceleration;
enet_uint32 packetThrottleInterval;
enet_uint32 pingInterval;
enet_uint32 timeoutLimit;
enet_uint32 timeoutMinimum;
enet_uint32 timeoutMaximum;
enet_uint32 lastRoundTripTime;
enet_uint32 lowestRoundTripTime;
enet_uint32 lastRoundTripTimeVariance;
enet_uint32 highestRoundTripTimeVariance;
enet_uint32 roundTripTime; /**< mean round trip time (RTT), in milliseconds, between sending a reliable packet and receiving its acknowledgement */
enet_uint32 roundTripTimeVariance;
enet_uint32 mtu;
enet_uint32 windowSize;
enet_uint32 reliableDataInTransit;
enet_uint16 outgoingReliableSequenceNumber;
ENetList acknowledgements;
ENetList sentReliableCommands;
ENetList sentUnreliableCommands;
ENetList outgoingReliableCommands;
ENetList outgoingUnreliableCommands;
ENetList dispatchedCommands;
int needsDispatch;
enet_uint16 incomingUnsequencedGroup;
enet_uint16 outgoingUnsequencedGroup;
enet_uint32 unsequencedWindow[ENET_PEER_UNSEQUENCED_WINDOW_SIZE / 32];
enet_uint32 eventData;
size_t totalWaitingData;
} ENetPeer;
/** An ENet packet compressor for compressing UDP packets before socket sends or receives. */
typedef struct _ENetCompressor {
/** Context data for the compressor. Must be non-NULL. */
void *context;
/** Compresses from inBuffers[0:inBufferCount-1], containing inLimit bytes, to outData, outputting at most outLimit bytes. Should return 0 on failure. */
size_t(ENET_CALLBACK * compress) (void *context, const ENetBuffer * inBuffers, size_t inBufferCount, size_t inLimit, enet_uint8 * outData, size_t outLimit);
/** Decompresses from inData, containing inLimit bytes, to outData, outputting at most outLimit bytes. Should return 0 on failure. */
size_t(ENET_CALLBACK * decompress) (void *context, const enet_uint8 * inData, size_t inLimit, enet_uint8 * outData, size_t outLimit);
/** Destroys the context when compression is disabled or the host is destroyed. May be NULL. */
void (ENET_CALLBACK * destroy)(void *context);
} ENetCompressor;
/** Callback that computes the checksum of the data held in buffers[0:bufferCount-1] */
typedef enet_uint32 (ENET_CALLBACK * ENetChecksumCallback)(const ENetBuffer *buffers, size_t bufferCount);
/** Callback for intercepting received raw UDP packets. Should return 1 to intercept, 0 to ignore, or -1 to propagate an error. */
typedef int (ENET_CALLBACK * ENetInterceptCallback)(struct _ENetHost *host, void *event);
/** An ENet host for communicating with peers.
*
* No fields should be modified unless otherwise stated.
*
* @sa enet_host_create()
* @sa enet_host_destroy()
* @sa enet_host_connect()
* @sa enet_host_service()
* @sa enet_host_flush()
* @sa enet_host_broadcast()
* @sa enet_host_compress()
* @sa enet_host_channel_limit()
* @sa enet_host_bandwidth_limit()
* @sa enet_host_bandwidth_throttle()
*/
typedef struct _ENetHost {
ENetSocket socket;
ENetAddress address; /**< Internet address of the host */
enet_uint32 incomingBandwidth; /**< downstream bandwidth of the host */
enet_uint32 outgoingBandwidth; /**< upstream bandwidth of the host */
enet_uint32 bandwidthThrottleEpoch;
enet_uint32 mtu;
enet_uint32 randomSeed;
int recalculateBandwidthLimits;
ENetPeer * peers; /**< array of peers allocated for this host */
size_t peerCount; /**< number of peers allocated for this host */
size_t channelLimit; /**< maximum number of channels allowed for connected peers */
enet_uint32 serviceTime;
ENetList dispatchQueue;
int continueSending;
size_t packetSize;
enet_uint16 headerFlags;
ENetProtocol commands[ENET_PROTOCOL_MAXIMUM_PACKET_COMMANDS];
size_t commandCount;
ENetBuffer buffers[ENET_BUFFER_MAXIMUM];
size_t bufferCount;
ENetChecksumCallback checksum; /**< callback the user can set to enable packet checksums for this host */
ENetCompressor compressor;
enet_uint8 packetData[2][ENET_PROTOCOL_MAXIMUM_MTU];
ENetAddress receivedAddress;
enet_uint8 * receivedData;
size_t receivedDataLength;
enet_uint32 totalSentData; /**< total data sent, user should reset to 0 as needed to prevent overflow */
enet_uint32 totalSentPackets; /**< total UDP packets sent, user should reset to 0 as needed to prevent overflow */
enet_uint32 totalReceivedData; /**< total data received, user should reset to 0 as needed to prevent overflow */
enet_uint32 totalReceivedPackets; /**< total UDP packets received, user should reset to 0 as needed to prevent overflow */
ENetInterceptCallback intercept; /**< callback the user can set to intercept received raw UDP packets */
size_t connectedPeers;
size_t bandwidthLimitedPeers;
size_t duplicatePeers; /**< optional number of allowed peers from duplicate IPs, defaults to ENET_PROTOCOL_MAXIMUM_PEER_ID */
size_t maximumPacketSize; /**< the maximum allowable packet size that may be sent or received on a peer */
size_t maximumWaitingData; /**< the maximum aggregate amount of buffer space a peer may use waiting for packets to be delivered */
} ENetHost;
/**
* An ENet event type, as specified in @ref ENetEvent.
*/
typedef enum _ENetEventType {
/** no event occurred within the specified time limit */
ENET_EVENT_TYPE_NONE = 0,
/** a connection request initiated by enet_host_connect has completed.
* The peer field contains the peer which successfully connected.
*/
ENET_EVENT_TYPE_CONNECT = 1,
/** a peer has disconnected. This event is generated on a successful
* completion of a disconnect initiated by enet_peer_disconnect, if
* a peer has timed out. The peer field contains the peer
* which disconnected. The data field contains user supplied data
* describing the disconnection, or 0, if none is available.
*/
ENET_EVENT_TYPE_DISCONNECT = 2,
/** a packet has been received from a peer. The peer field specifies the
* peer which sent the packet. The channelID field specifies the channel
* number upon which the packet was received. The packet field contains
* the packet that was received; this packet must be destroyed with
* enet_packet_destroy after use.
*/
ENET_EVENT_TYPE_RECEIVE = 3,
/** a peer is disconnected because the host didn't receive the acknowledgment
* packet within certain maximum time out. The reason could be because of bad
* network connection or host crashed.
*/
ENET_EVENT_TYPE_DISCONNECT_TIMEOUT = 4,
} ENetEventType;
/**
* An ENet event as returned by enet_host_service().
*
* @sa enet_host_service
*/
typedef struct _ENetEvent {
ENetEventType type; /**< type of the event */
ENetPeer * peer; /**< peer that generated a connect, disconnect or receive event */
enet_uint8 channelID; /**< channel on the peer that generated the event, if appropriate */
enet_uint32 data; /**< data associated with the event, if appropriate */
ENetPacket * packet; /**< packet associated with the event, if appropriate */
} ENetEvent;
// =======================================================================//
// !
// ! Public API
// !
// =======================================================================//
/**
* Initializes ENet globally. Must be called prior to using any functions in ENet.
* @returns 0 on success, < 0 on failure
*/
ENET_API int enet_initialize(void);
/**
* Initializes ENet globally and supplies user-overridden callbacks. Must be called prior to using any functions in ENet. Do not use enet_initialize() if you use this variant. Make sure the ENetCallbacks structure is zeroed out so that any additional callbacks added in future versions will be properly ignored.
*
* @param version the constant ENET_VERSION should be supplied so ENet knows which version of ENetCallbacks struct to use
* @param inits user-overridden callbacks where any NULL callbacks will use ENet's defaults
* @returns 0 on success, < 0 on failure
*/
ENET_API int enet_initialize_with_callbacks(ENetVersion version, const ENetCallbacks * inits);
/**
* Shuts down ENet globally. Should be called when a program that has initialized ENet exits.
*/
ENET_API void enet_deinitialize(void);
/**
* Gives the linked version of the ENet library.
* @returns the version number
*/
ENET_API ENetVersion enet_linked_version(void);
/** Returns the monotonic time in milliseconds. Its initial value is unspecified unless otherwise set. */
ENET_API enet_uint32 enet_time_get(void);
/** ENet socket functions */
ENET_API ENetSocket enet_socket_create(ENetSocketType);
ENET_API int enet_socket_bind(ENetSocket, const ENetAddress *);
ENET_API int enet_socket_get_address(ENetSocket, ENetAddress *);
ENET_API int enet_socket_listen(ENetSocket, int);
ENET_API ENetSocket enet_socket_accept(ENetSocket, ENetAddress *);
ENET_API int enet_socket_connect(ENetSocket, const ENetAddress *);
ENET_API int enet_socket_send(ENetSocket, const ENetAddress *, const ENetBuffer *, size_t);
ENET_API int enet_socket_receive(ENetSocket, ENetAddress *, ENetBuffer *, size_t);
ENET_API int enet_socket_wait(ENetSocket, enet_uint32 *, enet_uint64);
ENET_API int enet_socket_set_option(ENetSocket, ENetSocketOption, int);
ENET_API int enet_socket_get_option(ENetSocket, ENetSocketOption, int *);
ENET_API int enet_socket_shutdown(ENetSocket, ENetSocketShutdown);
ENET_API void enet_socket_destroy(ENetSocket);
ENET_API int enet_socketset_select(ENetSocket, ENetSocketSet *, ENetSocketSet *, enet_uint32);
/** Attempts to parse the printable form of the IP address in the parameter hostName
and sets the host field in the address parameter if successful.
@param address destination to store the parsed IP address
@param hostName IP address to parse
@retval 0 on success
@retval < 0 on failure
@returns the address of the given hostName in address on success
*/
ENET_API int enet_address_set_host_ip(ENetAddress * address, const char * hostName);
/** Attempts to resolve the host named by the parameter hostName and sets
the host field in the address parameter if successful.
@param address destination to store resolved address
@param hostName host name to lookup
@retval 0 on success
@retval < 0 on failure
@returns the address of the given hostName in address on success
*/
ENET_API int enet_address_set_host(ENetAddress * address, const char * hostName);
/** Gives the printable form of the IP address specified in the address parameter.
@param address address printed
@param hostName destination for name, must not be NULL
@param nameLength maximum length of hostName.
@returns the null-terminated name of the host in hostName on success
@retval 0 on success
@retval < 0 on failure
*/
ENET_API int enet_address_get_host_ip(const ENetAddress * address, char * hostName, size_t nameLength);
/** Attempts to do a reverse lookup of the host field in the address parameter.
@param address address used for reverse lookup
@param hostName destination for name, must not be NULL
@param nameLength maximum length of hostName.
@returns the null-terminated name of the host in hostName on success
@retval 0 on success
@retval < 0 on failure
*/
ENET_API int enet_address_get_host(const ENetAddress * address, char * hostName, size_t nameLength);
ENET_API enet_uint32 enet_host_get_peers_count(ENetHost *);
ENET_API enet_uint32 enet_host_get_packets_sent(ENetHost *);
ENET_API enet_uint32 enet_host_get_packets_received(ENetHost *);
ENET_API enet_uint32 enet_host_get_bytes_sent(ENetHost *);
ENET_API enet_uint32 enet_host_get_bytes_received(ENetHost *);
ENET_API enet_uint32 enet_host_get_received_data(ENetHost *, enet_uint8** data);
ENET_API enet_uint32 enet_host_get_mtu(ENetHost *);
ENET_API enet_uint32 enet_peer_get_id(ENetPeer *);
ENET_API enet_uint32 enet_peer_get_ip(ENetPeer *, char * ip, size_t ipLength);
ENET_API enet_uint16 enet_peer_get_port(ENetPeer *);
ENET_API enet_uint32 enet_peer_get_rtt(ENetPeer *);
ENET_API enet_uint64 enet_peer_get_packets_sent(ENetPeer *);
ENET_API enet_uint32 enet_peer_get_packets_lost(ENetPeer *);
ENET_API enet_uint64 enet_peer_get_bytes_sent(ENetPeer *);
ENET_API enet_uint64 enet_peer_get_bytes_received(ENetPeer *);
ENET_API ENetPeerState enet_peer_get_state(ENetPeer *);
ENET_API void * enet_peer_get_data(ENetPeer *);
ENET_API void enet_peer_set_data(ENetPeer *, const void *);
ENET_API void * enet_packet_get_data(ENetPacket *);
ENET_API enet_uint32 enet_packet_get_length(ENetPacket *);
ENET_API void enet_packet_set_free_callback(ENetPacket *, void *);
ENET_API ENetPacket * enet_packet_create(const void *, size_t, enet_uint32);
ENET_API ENetPacket * enet_packet_create_offset(const void *, size_t, size_t, enet_uint32);
ENET_API void enet_packet_destroy(ENetPacket *);
ENET_API enet_uint32 enet_crc32(const ENetBuffer *, size_t);
ENET_API ENetHost * enet_host_create(const ENetAddress *, size_t, size_t, enet_uint32, enet_uint32);
ENET_API void enet_host_destroy(ENetHost *);
ENET_API ENetPeer * enet_host_connect(ENetHost *, const ENetAddress *, size_t, enet_uint32);
ENET_API int enet_host_check_events(ENetHost *, ENetEvent *);
ENET_API int enet_host_service(ENetHost *, ENetEvent *, enet_uint32);
ENET_API int enet_host_send_raw(ENetHost *, const ENetAddress *, enet_uint8 *, size_t);
ENET_API int enet_host_send_raw_ex(ENetHost *host, const ENetAddress* address, enet_uint8* data, size_t skipBytes, size_t bytesToSend);
ENET_API void enet_host_set_intercept(ENetHost *, const ENetInterceptCallback);
ENET_API void enet_host_flush(ENetHost *);
ENET_API void enet_host_broadcast(ENetHost *, enet_uint8, ENetPacket *);
ENET_API void enet_host_compress(ENetHost *, const ENetCompressor *);
ENET_API void enet_host_channel_limit(ENetHost *, size_t);
ENET_API void enet_host_bandwidth_limit(ENetHost *, enet_uint32, enet_uint32);
extern void enet_host_bandwidth_throttle(ENetHost *);
extern enet_uint64 enet_host_random_seed(void);
ENET_API int enet_peer_send(ENetPeer *, enet_uint8, ENetPacket *);
ENET_API ENetPacket * enet_peer_receive(ENetPeer *, enet_uint8 * channelID);
ENET_API void enet_peer_ping(ENetPeer *);
ENET_API void enet_peer_ping_interval(ENetPeer *, enet_uint32);
ENET_API void enet_peer_timeout(ENetPeer *, enet_uint32, enet_uint32, enet_uint32);
ENET_API void enet_peer_reset(ENetPeer *);
ENET_API void enet_peer_disconnect(ENetPeer *, enet_uint32);
ENET_API void enet_peer_disconnect_now(ENetPeer *, enet_uint32);
ENET_API void enet_peer_disconnect_later(ENetPeer *, enet_uint32);
ENET_API void enet_peer_throttle_configure(ENetPeer *, enet_uint32, enet_uint32, enet_uint32);
extern int enet_peer_throttle(ENetPeer *, enet_uint32);
extern void enet_peer_reset_queues(ENetPeer *);
extern void enet_peer_setup_outgoing_command(ENetPeer *, ENetOutgoingCommand *);
extern ENetOutgoingCommand * enet_peer_queue_outgoing_command(ENetPeer *, const ENetProtocol *, ENetPacket *, enet_uint32, enet_uint16);
extern ENetIncomingCommand * enet_peer_queue_incoming_command(ENetPeer *, const ENetProtocol *, const void *, size_t, enet_uint32, enet_uint32);
extern ENetAcknowledgement * enet_peer_queue_acknowledgement(ENetPeer *, const ENetProtocol *, enet_uint16);
extern void enet_peer_dispatch_incoming_unreliable_commands(ENetPeer *, ENetChannel *);
extern void enet_peer_dispatch_incoming_reliable_commands(ENetPeer *, ENetChannel *);
extern void enet_peer_on_connect(ENetPeer *);
extern void enet_peer_on_disconnect(ENetPeer *);
extern size_t enet_protocol_command_size (enet_uint8);
#ifdef __cplusplus
}
#endif
#if defined(ENET_IMPLEMENTATION) && !defined(ENET_IMPLEMENTATION_DONE)
#define ENET_IMPLEMENTATION_DONE 1
#ifdef __cplusplus
extern "C" {
#endif
// =======================================================================//
// !
// ! Atomics
// !
// =======================================================================//
#if defined(_MSC_VER)