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perfect_dark/port/include/external/enet.h
T

5099 lines
175 KiB
C

/*
* ENet reliable UDP networking library
* Copyright (c) 2018 Lee Salzman, Vladyslav Hrytsenko, Dominik Madarász, Stanislav Denisov
*
* 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_H
#define ENET_H
#include <stdlib.h>
#include <stdbool.h>
#include <stdint.h>
#include <time.h>
#define ENET_VERSION_MAJOR 2
#define ENET_VERSION_MINOR 4
#define ENET_VERSION_PATCH 8
#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))
#define ENET_MAX(x, y) ((x) > (y) ? (x) : (y))
#define ENET_MIN(x, y) ((x) < (y) ? (x) : (y))
/*
=======================================================================
System differences
=======================================================================
*/
#ifdef _WIN32
#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 ENET_NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
#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
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
#else
#define ENET_API extern
#endif
#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
typedef struct {
void* data;
size_t dataLength;
} ENetBuffer;
#define ENET_CALLBACK
#define ENET_API extern
#endif
#ifndef ENET_BUFFER_MAXIMUM
#define ENET_BUFFER_MAXIMUM (1 + 2 * ENET_PROTOCOL_MAXIMUM_PACKET_COMMANDS)
#endif
#define ENET_HOST_ANY in6addr_any
#define ENET_PORT_ANY 0
#define ENET_HOST_SIZE 1025
#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))
#if __BIG_ENDIAN__
#define ENET_HOST_TO_NET_64(x) (x)
#define ENET_NET_TO_HOST_64(x) (x)
#else
#define ENET_HOST_TO_NET_64(x) (((uint64_t)htonl((x) & 0xFFFFFFFF) << 32) | htonl((x) >> 32))
#define ENET_NET_TO_HOST_64(x) (((uint64_t)ntohl((x) & 0xFFFFFFFF) << 32) | ntohl((x) >> 32))
#endif
#ifdef __cplusplus
extern "C" {
#endif
/*
=======================================================================
Internals
=======================================================================
*/
typedef uint32_t ENetVersion;
typedef fd_set ENetSocketSet;
typedef struct _ENetCallbacks {
void* (ENET_CALLBACK *malloc)(size_t size);
void (ENET_CALLBACK *free)(void* memory);
void (ENET_CALLBACK *noMemory)(void);
} ENetCallbacks;
extern void* enet_malloc(size_t);
extern void enet_free(void*);
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)
#define enet_in6_equal(a, b) (memcmp(&a, &b, sizeof(struct in6_addr)) == 0)
/*
=======================================================================
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_SENT_TIME = (1 << 14),
ENET_PROTOCOL_HEADER_FLAG_MASK = 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 {
uint16_t peerID;
uint16_t sentTime;
} ENET_PACKED ENetProtocolHeader;
typedef struct _ENetProtocolCommandHeader {
uint8_t command;
uint8_t channelID;
uint16_t reliableSequenceNumber;
} ENET_PACKED ENetProtocolCommandHeader;
typedef struct _ENetProtocolAcknowledge {
ENetProtocolCommandHeader header;
uint16_t receivedReliableSequenceNumber;
uint16_t receivedSentTime;
} ENET_PACKED ENetProtocolAcknowledge;
typedef struct _ENetProtocolConnect {
ENetProtocolCommandHeader header;
uint16_t outgoingPeerID;
uint8_t incomingSessionID;
uint8_t outgoingSessionID;
uint32_t mtu;
uint32_t windowSize;
uint32_t channelCount;
uint32_t incomingBandwidth;
uint32_t outgoingBandwidth;
uint32_t packetThrottleInterval;
uint32_t packetThrottleAcceleration;
uint32_t packetThrottleDeceleration;
uint32_t connectID;
uint32_t data;
} ENET_PACKED ENetProtocolConnect;
typedef struct _ENetProtocolVerifyConnect {
ENetProtocolCommandHeader header;
uint16_t outgoingPeerID;
uint8_t incomingSessionID;
uint8_t outgoingSessionID;
uint32_t mtu;
uint32_t windowSize;
uint32_t channelCount;
uint32_t incomingBandwidth;
uint32_t outgoingBandwidth;
uint32_t packetThrottleInterval;
uint32_t packetThrottleAcceleration;
uint32_t packetThrottleDeceleration;
uint32_t connectID;
} ENET_PACKED ENetProtocolVerifyConnect;
typedef struct _ENetProtocolBandwidthLimit {
ENetProtocolCommandHeader header;
uint32_t incomingBandwidth;
uint32_t outgoingBandwidth;
} ENET_PACKED ENetProtocolBandwidthLimit;
typedef struct _ENetProtocolThrottleConfigure {
ENetProtocolCommandHeader header;
uint32_t packetThrottleInterval;
uint32_t packetThrottleAcceleration;
uint32_t packetThrottleDeceleration;
} ENET_PACKED ENetProtocolThrottleConfigure;
typedef struct _ENetProtocolDisconnect {
ENetProtocolCommandHeader header;
uint32_t data;
} ENET_PACKED ENetProtocolDisconnect;
typedef struct _ENetProtocolPing {
ENetProtocolCommandHeader header;
} ENET_PACKED ENetProtocolPing;
typedef struct _ENetProtocolSendReliable {
ENetProtocolCommandHeader header;
uint16_t dataLength;
} ENET_PACKED ENetProtocolSendReliable;
typedef struct _ENetProtocolSendUnreliable {
ENetProtocolCommandHeader header;
uint16_t unreliableSequenceNumber;
uint16_t dataLength;
} ENET_PACKED ENetProtocolSendUnreliable;
typedef struct _ENetProtocolSendUnsequenced {
ENetProtocolCommandHeader header;
uint16_t unsequencedGroup;
uint16_t dataLength;
} ENET_PACKED ENetProtocolSendUnsequenced;
typedef struct _ENetProtocolSendFragment {
ENetProtocolCommandHeader header;
uint16_t startSequenceNumber;
uint16_t dataLength;
uint32_t fragmentCount;
uint32_t fragmentNumber;
uint32_t totalLength;
uint32_t 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 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;
typedef struct _ENetAddress {
union {
struct in6_addr ipv6;
struct {
uint8_t zeros[10];
uint16_t ffff;
struct in_addr ip;
} ipv4;
};
uint16_t port;
} ENetAddress;
typedef enum _ENetPacketFlag {
ENET_PACKET_FLAG_NONE = 0,
ENET_PACKET_FLAG_RELIABLE = (1 << 0),
ENET_PACKET_FLAG_UNSEQUENCED = (1 << 1),
ENET_PACKET_FLAG_NO_ALLOCATE = (1 << 2),
ENET_PACKET_FLAG_UNRELIABLE_FRAGMENTED = (1 << 3),
ENET_PACKET_FLAG_INSTANT = (1 << 4),
ENET_PACKET_FLAG_UNTHROTTLED = (1 << 5),
ENET_PACKET_FLAG_SENT = (1 << 8)
} ENetPacketFlag;
typedef void (ENET_CALLBACK *ENetPacketFreeCallback)(void*);
typedef struct _ENetPacket {
uint32_t flags;
uint32_t dataLength;
uint8_t* data;
ENetPacketFreeCallback freeCallback;
uint32_t referenceCount;
void* userData;
} ENetPacket;
typedef struct _ENetAcknowledgement {
ENetListNode acknowledgementList;
uint32_t sentTime;
ENetProtocol command;
} ENetAcknowledgement;
typedef struct _ENetOutgoingCommand {
ENetListNode outgoingCommandList;
uint16_t reliableSequenceNumber;
uint16_t unreliableSequenceNumber;
uint32_t sentTime;
uint32_t roundTripTimeout;
uint32_t roundTripTimeoutLimit;
uint32_t fragmentOffset;
uint16_t fragmentLength;
uint16_t sendAttempts;
ENetProtocol command;
ENetPacket* packet;
} ENetOutgoingCommand;
typedef struct _ENetIncomingCommand {
ENetListNode incomingCommandList;
uint16_t reliableSequenceNumber;
uint16_t unreliableSequenceNumber;
ENetProtocol command;
uint32_t fragmentCount;
uint32_t fragmentsRemaining;
uint32_t* 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_BUFFER_SIZE_MIN = 256 * 1024,
ENET_HOST_BUFFER_SIZE_MAX = 1024 * 1024,
ENET_HOST_BANDWIDTH_THROTTLE_INTERVAL = 1000,
ENET_HOST_DEFAULT_MTU = 1280,
ENET_HOST_DEFAULT_MAXIMUM_PACKET_SIZE = 32 * 1024 * 1024,
ENET_HOST_DEFAULT_MAXIMUM_WAITING_DATA = 32 * 1024 * 1024,
ENET_PEER_DEFAULT_ROUND_TRIP_TIME = 1,
ENET_PEER_DEFAULT_PACKET_THROTTLE = 32,
ENET_PEER_PACKET_THROTTLE_THRESHOLD = 40,
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_WINDOW_SIZE_SCALE = 64 * 1024,
ENET_PEER_TIMEOUT_LIMIT = 32,
ENET_PEER_TIMEOUT_MINIMUM = 5000,
ENET_PEER_TIMEOUT_MAXIMUM = 30000,
ENET_PEER_PING_INTERVAL = 250,
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 {
uint16_t outgoingReliableSequenceNumber;
uint16_t outgoingUnreliableSequenceNumber;
uint16_t usedReliableWindows;
uint16_t reliableWindows[ENET_PEER_RELIABLE_WINDOWS];
uint16_t incomingReliableSequenceNumber;
uint16_t incomingUnreliableSequenceNumber;
ENetList incomingReliableCommands;
ENetList incomingUnreliableCommands;
} ENetChannel;
typedef struct _ENetPeer {
ENetListNode dispatchList;
struct _ENetHost* host;
uint16_t outgoingPeerID;
uint16_t incomingPeerID;
uint32_t connectID;
uint8_t outgoingSessionID;
uint8_t incomingSessionID;
ENetAddress address;
void* data;
ENetPeerState state;
ENetChannel* channels;
size_t channelCount;
uint32_t incomingBandwidth;
uint32_t outgoingBandwidth;
uint32_t incomingBandwidthThrottleEpoch;
uint32_t outgoingBandwidthThrottleEpoch;
uint32_t incomingDataTotal;
uint64_t totalDataReceived;
uint32_t outgoingDataTotal;
uint64_t totalDataSent;
uint32_t lastSendTime;
uint32_t lastReceiveTime;
uint32_t nextTimeout;
uint32_t earliestTimeout;
uint64_t totalPacketsSent;
uint64_t totalPacketsLost;
uint32_t packetThrottle;
uint32_t packetThrottleThreshold;
uint32_t packetThrottleLimit;
uint32_t packetThrottleCounter;
uint32_t packetThrottleEpoch;
uint32_t packetThrottleAcceleration;
uint32_t packetThrottleDeceleration;
uint32_t packetThrottleInterval;
uint32_t pingInterval;
uint32_t timeoutLimit;
uint32_t timeoutMinimum;
uint32_t timeoutMaximum;
uint32_t lastRoundTripTime;
uint32_t lowestRoundTripTime;
uint32_t lastRoundTripTimeVariance;
uint32_t highestRoundTripTimeVariance;
uint32_t roundTripTime;
uint32_t roundTripTimeVariance;
uint32_t mtu;
uint32_t windowSize;
uint32_t reliableDataInTransit;
uint16_t outgoingReliableSequenceNumber;
ENetList acknowledgements;
ENetList sentReliableCommands;
ENetList sentUnreliableCommands;
ENetList outgoingCommands;
ENetList dispatchedCommands;
int needsDispatch;
uint16_t incomingUnsequencedGroup;
uint16_t outgoingUnsequencedGroup;
uint32_t unsequencedWindow[ENET_PEER_UNSEQUENCED_WINDOW_SIZE / 32];
uint32_t eventData;
size_t totalWaitingData;
} ENetPeer;
typedef enum _ENetEventType {
ENET_EVENT_TYPE_NONE = 0,
ENET_EVENT_TYPE_CONNECT = 1,
ENET_EVENT_TYPE_DISCONNECT = 2,
ENET_EVENT_TYPE_RECEIVE = 3,
ENET_EVENT_TYPE_DISCONNECT_TIMEOUT = 4
} ENetEventType;
typedef struct _ENetEvent {
ENetEventType type;
ENetPeer* peer;
uint8_t channelID;
uint32_t data;
ENetPacket* packet;
} ENetEvent;
typedef uint64_t (ENET_CALLBACK *ENetChecksumCallback)(const ENetBuffer* buffers, int bufferCount);
typedef int (ENET_CALLBACK *ENetInterceptCallback)(ENetEvent* event, ENetAddress* address, uint8_t* receivedData, int receivedDataLength);
typedef struct _ENetHost {
ENetSocket socket;
ENetAddress address;
uint32_t incomingBandwidth;
uint32_t outgoingBandwidth;
uint32_t bandwidthThrottleEpoch;
uint32_t mtu;
uint32_t randomSeed;
int recalculateBandwidthLimits;
uint8_t preventConnections;
ENetPeer* peers;
size_t peerCount;
size_t channelLimit;
uint32_t serviceTime;
ENetList dispatchQueue;
int continueSending;
size_t packetSize;
uint16_t headerFlags;
uint32_t totalSentData;
uint32_t totalSentPackets;
uint32_t totalReceivedData;
uint32_t totalReceivedPackets;
ENetProtocol commands[ENET_PROTOCOL_MAXIMUM_PACKET_COMMANDS];
size_t commandCount;
ENetBuffer buffers[ENET_BUFFER_MAXIMUM];
size_t bufferCount;
ENetChecksumCallback checksumCallback;
uint8_t packetData[2][ENET_PROTOCOL_MAXIMUM_MTU];
ENetAddress receivedAddress;
uint8_t* receivedData;
size_t receivedDataLength;
ENetInterceptCallback interceptCallback;
size_t connectedPeers;
size_t bandwidthLimitedPeers;
size_t duplicatePeers;
size_t maximumPacketSize;
size_t maximumWaitingData;
} ENetHost;
/*
=======================================================================
Public API
=======================================================================
*/
ENET_API int enet_initialize(void);
ENET_API int enet_initialize_with_callbacks(ENetVersion, const ENetCallbacks*);
ENET_API void enet_deinitialize(void);
ENET_API ENetVersion enet_linked_version(void);
ENET_API int enet_array_is_zeroed(const uint8_t*, int);
ENET_API uint32_t enet_time_get(void);
ENET_API uint64_t enet_crc64(const ENetBuffer*, int);
ENET_API ENetPacket* enet_packet_create(const void*, size_t, uint32_t);
ENET_API ENetPacket* enet_packet_create_offset(const void*, size_t, size_t, uint32_t);
ENET_API void enet_packet_destroy(ENetPacket*);
ENET_API int enet_peer_send(ENetPeer*, uint8_t, ENetPacket*);
ENET_API ENetPacket* enet_peer_receive(ENetPeer*, uint8_t*);
ENET_API void enet_peer_ping(ENetPeer*);
ENET_API void enet_peer_ping_interval(ENetPeer*, uint32_t);
ENET_API void enet_peer_timeout(ENetPeer*, uint32_t, uint32_t, uint32_t);
ENET_API void enet_peer_reset(ENetPeer*);
ENET_API void enet_peer_disconnect(ENetPeer*, uint32_t);
ENET_API void enet_peer_disconnect_now(ENetPeer*, uint32_t);
ENET_API void enet_peer_disconnect_later(ENetPeer*, uint32_t);
ENET_API void enet_peer_throttle_configure(ENetPeer*, uint32_t, uint32_t, uint32_t, uint32_t);
ENET_API ENetHost* enet_host_create(const ENetAddress*, size_t, size_t, uint32_t, uint32_t, int);
ENET_API void enet_host_destroy(ENetHost*);
ENET_API void enet_host_prevent_connections(ENetHost*, uint8_t);
ENET_API ENetPeer* enet_host_connect(ENetHost*, const ENetAddress*, size_t, uint32_t);
ENET_API int enet_host_check_events(ENetHost*, ENetEvent*);
ENET_API int enet_host_service(ENetHost*, ENetEvent*, uint32_t);
ENET_API void enet_host_flush(ENetHost*);
ENET_API void enet_host_broadcast(ENetHost*, uint8_t, ENetPacket*);
ENET_API void enet_host_broadcast_exclude(ENetHost*, uint8_t, ENetPacket*, ENetPeer*);
ENET_API void enet_host_broadcast_selective(ENetHost*, uint8_t, ENetPacket*, ENetPeer**, size_t);
ENET_API void enet_host_channel_limit(ENetHost*, size_t);
ENET_API void enet_host_bandwidth_limit(ENetHost*, uint32_t, uint32_t);
ENET_API int enet_address_set_ip(ENetAddress*, const char*);
ENET_API int enet_address_set_hostname(ENetAddress*, const char*);
ENET_API int enet_address_get_ip(const ENetAddress*, char*, size_t);
ENET_API int enet_address_get_hostname(const ENetAddress*, char*, size_t);
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, uint32_t*, uint64_t);
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_socket_set_select(ENetSocket, ENetSocketSet*, ENetSocketSet*, uint32_t);
/* Extended API for easier binding in other programming languages */
ENET_API void* enet_packet_get_data(const ENetPacket*);
ENET_API void* enet_packet_get_user_data(const ENetPacket*);
ENET_API void enet_packet_set_user_data(ENetPacket*, void* userData);
ENET_API int enet_packet_get_length(const ENetPacket*);
ENET_API void enet_packet_set_free_callback(ENetPacket*, ENetPacketFreeCallback);
ENET_API int enet_packet_check_references(const ENetPacket*);
ENET_API void enet_packet_dispose(ENetPacket*);
ENET_API uint32_t enet_host_get_peers_count(const ENetHost*);
ENET_API uint32_t enet_host_get_packets_sent(const ENetHost*);
ENET_API uint32_t enet_host_get_packets_received(const ENetHost*);
ENET_API uint32_t enet_host_get_bytes_sent(const ENetHost*);
ENET_API uint32_t enet_host_get_bytes_received(const ENetHost*);
ENET_API void enet_host_set_max_duplicate_peers(ENetHost*, uint16_t);
ENET_API void enet_host_set_intercept_callback(ENetHost*, ENetInterceptCallback);
ENET_API void enet_host_set_checksum_callback(ENetHost*, ENetChecksumCallback);
ENET_API uint32_t enet_peer_get_id(const ENetPeer*);
ENET_API int enet_peer_get_ip(const ENetPeer*, char*, size_t);
ENET_API uint16_t enet_peer_get_port(const ENetPeer*);
ENET_API uint32_t enet_peer_get_mtu(const ENetPeer*);
ENET_API ENetPeerState enet_peer_get_state(const ENetPeer*);
ENET_API uint32_t enet_peer_get_rtt(const ENetPeer*);
ENET_API uint32_t enet_peer_get_last_rtt(const ENetPeer* peer);
ENET_API uint32_t enet_peer_get_lastsendtime(const ENetPeer*);
ENET_API uint32_t enet_peer_get_lastreceivetime(const ENetPeer*);
ENET_API uint64_t enet_peer_get_packets_sent(const ENetPeer*);
ENET_API uint64_t enet_peer_get_packets_lost(const ENetPeer*);
ENET_API float enet_peer_get_packets_throttle(const ENetPeer*);
ENET_API uint64_t enet_peer_get_bytes_sent(const ENetPeer*);
ENET_API uint64_t enet_peer_get_bytes_received(const ENetPeer*);
ENET_API void* enet_peer_get_data(const ENetPeer*);
ENET_API void enet_peer_set_data(ENetPeer*, const void*);
/*
=======================================================================
Private API
=======================================================================
*/
extern void enet_host_bandwidth_throttle(ENetHost*);
extern uint64_t enet_host_random_seed(void);
extern int enet_peer_throttle(ENetPeer*, uint32_t);
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*, uint32_t, uint16_t);
extern ENetIncomingCommand* enet_peer_queue_incoming_command(ENetPeer*, const ENetProtocol*, const void*, size_t, uint32_t, uint32_t);
extern ENetAcknowledgement* enet_peer_queue_acknowledgement(ENetPeer*, const ENetProtocol*, uint16_t);
extern void enet_peer_dispatch_incoming_unreliable_commands(ENetPeer*, ENetChannel*, ENetIncomingCommand*);
extern void enet_peer_dispatch_incoming_reliable_commands(ENetPeer*, ENetChannel*, ENetIncomingCommand*);
extern void enet_peer_on_connect(ENetPeer*);
extern void enet_peer_on_disconnect(ENetPeer*);
extern size_t enet_protocol_command_size(uint8_t);
#ifdef __cplusplus
}
#endif
#if defined(ENET_IMPLEMENTATION) && !defined(ENET_IMPLEMENTATION_DONE)
#define ENET_IMPLEMENTATION_DONE 1
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4244) /* 64-bit to 32-bit integer conversion */
#pragma warning(disable: 4267) /* size_t to integer conversion */
#endif
/*
=======================================================================
Atomics
=======================================================================
*/
#ifdef _MSC_VER
#define ENET_AT_CASSERT_PRED(predicate) sizeof(char[2 * !!(predicate) - 1])
#define ENET_IS_SUPPORTED_ATOMIC(size) ENET_AT_CASSERT_PRED(size == 1 || size == 2 || size == 4 || size == 8)
#define ENET_ATOMIC_SIZEOF(variable) (ENET_IS_SUPPORTED_ATOMIC(sizeof(*(variable))), sizeof(*(variable)))
__inline int64_t enet_at_atomic_read(char* ptr, size_t size) {
switch (size) {
case 1:
return _InterlockedExchangeAdd8((volatile char*)ptr, 0);
case 2:
return _InterlockedExchangeAdd16((volatile SHORT*)ptr, 0);
case 4:
#ifdef ENET_NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
return InterlockedExchangeAdd((volatile LONG*)ptr, 0);
#else
return _InterlockedExchangeAdd((volatile LONG*)ptr, 0);
#endif
case 8:
#ifdef ENET_NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
return InterlockedExchangeAdd64((volatile LONGLONG*)ptr, 0);
#else
return _InterlockedExchangeAdd64((volatile LONGLONG*)ptr, 0);
#endif
default:
return 0x0;
}
}
__inline int64_t enet_at_atomic_write(char* ptr, int64_t value, size_t size) {
switch (size) {
case 1:
return _InterlockedExchange8((volatile char*)ptr, (char)value);
case 2:
return _InterlockedExchange16((volatile SHORT*)ptr, (SHORT)value);
case 4:
#ifdef ENET_NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
return InterlockedExchange((volatile LONG*)ptr, (LONG)value);
#else
return _InterlockedExchange((volatile LONG*)ptr, (LONG)value);
#endif
case 8:
#ifdef ENET_NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
return InterlockedExchange64((volatile LONGLONG*)ptr, (LONGLONG)value);
#else
return _InterlockedExchange64((volatile LONGLONG*)ptr, (LONGLONG)value);
#endif
default:
return 0x0;
}
}
__inline int64_t enet_at_atomic_cas(char* ptr, int64_t new_val, int64_t old_val, size_t size) {
switch (size) {
case 1:
return _InterlockedCompareExchange8((volatile char*)ptr, (char)new_val, (char)old_val);
case 2:
return _InterlockedCompareExchange16((volatile SHORT*)ptr, (SHORT)new_val, (SHORT)old_val);
case 4:
#ifdef ENET_NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
return InterlockedCompareExchange((volatile LONG*)ptr, (LONG)new_val, (LONG)old_val);
#else
return _InterlockedCompareExchange((volatile LONG*)ptr, (LONG)new_val, (LONG)old_val);
#endif
case 8:
#ifdef ENET_NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
return InterlockedCompareExchange64((volatile LONGLONG*)ptr, (LONGLONG)new_val, (LONGLONG)old_val);
#else
return _InterlockedCompareExchange64((volatile LONGLONG*)ptr, (LONGLONG)new_val, (LONGLONG)old_val);
#endif
default:
return 0x0;
}
}
__inline int64_t enet_at_atomic_inc(char* ptr, int64_t delta, size_t data_size) {
switch (data_size) {
case 1:
return _InterlockedExchangeAdd8((volatile char*)ptr, (char)delta);
case 2:
return _InterlockedExchangeAdd16((volatile SHORT*)ptr, (SHORT)delta);
case 4:
#ifdef ENET_NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
return InterlockedExchangeAdd((volatile LONG*)ptr, (LONG)delta);
#else
return _InterlockedExchangeAdd((volatile LONG*)ptr, (LONG)delta);
#endif
case 8:
#ifdef ENET_NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
return InterlockedExchangeAdd64((volatile LONGLONG*)ptr, (LONGLONG)delta);
#else
return _InterlockedExchangeAdd64((volatile LONGLONG*)ptr, (LONGLONG)delta);
#endif
default:
return 0x0;
}
}
#define ENET_ATOMIC_READ(variable) enet_at_atomic_read((char*)(variable), ENET_ATOMIC_SIZEOF(variable))
#define ENET_ATOMIC_WRITE(variable, new_val) enet_at_atomic_write((char*)(variable), (int64_t)(new_val), ENET_ATOMIC_SIZEOF(variable))
#define ENET_ATOMIC_CAS(variable, old_value, new_val) enet_at_atomic_cas((char*)(variable), (int64_t)(new_val), (int64_t)(old_value), ENET_ATOMIC_SIZEOF(variable))
#define ENET_ATOMIC_INC(variable) enet_at_atomic_inc((char*)(variable), 1, ENET_ATOMIC_SIZEOF(variable))
#define ENET_ATOMIC_DEC(variable) enet_at_atomic_inc((char*)(variable), -1, ENET_ATOMIC_SIZEOF(variable))
#define ENET_ATOMIC_INC_BY(variable, delta) enet_at_atomic_inc((char*)(variable), (delta), ENET_ATOMIC_SIZEOF(variable))
#define ENET_ATOMIC_DEC_BY(variable, delta) enet_at_atomic_inc((char*)(variable), -(delta), ENET_ATOMIC_SIZEOF(variable))
#elif defined(__GNUC__) || defined(__clang__)
#if defined(__clang__) || (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7))
#define AT_HAVE_ATOMICS
#endif
/* We want to use __atomic built-ins if possible because the __sync primitives are
deprecated, because the __atomic build-ins allow us to use ENET_ATOMIC_WRITE on
uninitialized memory without running into undefined behavior, and because the
__atomic versions generate more efficient code since we don't need to rely on
CAS when we don't actually want it.
Note that we use acquire-release memory order (like mutexes do). We could use
sequentially consistent memory order but that has lower performance and is
almost always unneeded. */
#ifdef AT_HAVE_ATOMICS
#define ENET_ATOMIC_READ(ptr) __atomic_load_n((ptr), __ATOMIC_ACQUIRE)
#define ENET_ATOMIC_WRITE(ptr, value) __atomic_store_n((ptr), (value), __ATOMIC_RELEASE)
#ifndef typeof
#define typeof __typeof__
#endif
/* clang_analyzer doesn't know that CAS writes to memory so it complains about
potentially lost data. Replace the code with the equivalent non-sync code. */
#ifdef __clang_analyzer__
#define ENET_ATOMIC_CAS(ptr, old_value, new_value)\
({\
typeof(*(ptr)) ENET_ATOMIC_CAS_old_actual_ = (*(ptr));\
if (ATOMIC_CAS_old_actual_ == (old_value))\
*(ptr) = new_value;\
ENET_ATOMIC_CAS_old_actual_;\
})
#else
/* Could use __auto_type instead of typeof but that shouldn't work in C++.
The ({ }) syntax is a GCC extension called statement expression. It lets
us return a value out of the macro.
TODO We should return bool here instead of the old value to avoid the ABA
problem. */
#define ENET_ATOMIC_CAS(ptr, old_value, new_value)\
({\
typeof(*(ptr)) ENET_ATOMIC_CAS_expected_ = (old_value);\
__atomic_compare_exchange_n((ptr), &ENET_ATOMIC_CAS_expected_, (new_value), false,\
__ATOMIC_ACQ_REL, __ATOMIC_ACQUIRE);\
ENET_ATOMIC_CAS_expected_;\
})
#endif
#define ENET_ATOMIC_INC(ptr) __atomic_fetch_add((ptr), 1, __ATOMIC_ACQ_REL)
#define ENET_ATOMIC_DEC(ptr) __atomic_fetch_sub((ptr), 1, __ATOMIC_ACQ_REL)
#define ENET_ATOMIC_INC_BY(ptr, delta) __atomic_fetch_add((ptr), (delta), __ATOMIC_ACQ_REL)
#define ENET_ATOMIC_DEC_BY(ptr, delta) __atomic_fetch_sub((ptr), (delta), __ATOMIC_ACQ_REL)
#else
#define ENET_ATOMIC_READ(variable) __sync_fetch_and_add(variable, 0)
#define ENET_ATOMIC_WRITE(variable, new_val) (void)__sync_val_compare_and_swap((variable), *(variable), (new_val))
#define ENET_ATOMIC_CAS(variable, old_value, new_val) __sync_val_compare_and_swap((variable), (old_value), (new_val))
#define ENET_ATOMIC_INC(variable) __sync_fetch_and_add((variable), 1)
#define ENET_ATOMIC_DEC(variable) __sync_fetch_and_sub((variable), 1)
#define ENET_ATOMIC_INC_BY(variable, delta) __sync_fetch_and_add((variable), (delta), 1)
#define ENET_ATOMIC_DEC_BY(variable, delta) __sync_fetch_and_sub((variable), (delta), 1)
#endif
#undef AT_HAVE_ATOMICS
#endif
/*
=======================================================================
Callbacks
=======================================================================
*/
static ENetCallbacks callbacks = {
malloc,
free,
abort
};
int enet_initialize_with_callbacks(ENetVersion version, const ENetCallbacks* inits) {
if (version < ENET_VERSION_CREATE(1, 3, 0))
return -1;
if (inits->malloc != NULL || inits->free != NULL) {
if (inits->malloc == NULL || inits->free == NULL)
return -1;
callbacks.malloc = inits->malloc;
callbacks.free = inits->free;
}
if (inits->noMemory != NULL)
callbacks.noMemory = inits->noMemory;
return enet_initialize();
}
void* enet_malloc(size_t size) {
void* memory = callbacks.malloc(size);
if (memory == NULL)
callbacks.noMemory();
return memory;
}
void enet_free(void* memory) {
callbacks.free(memory);
}
/*
=======================================================================
List
=======================================================================
*/
void enet_list_clear(ENetList* list) {
list->sentinel.next = &list->sentinel;
list->sentinel.previous = &list->sentinel;
}
ENetListIterator enet_list_insert(ENetListIterator position, void* data) {
ENetListIterator result = (ENetListIterator)data;
result->previous = position->previous;
result->next = position;
result->previous->next = result;
position->previous = result;
return result;
}
void* enet_list_remove(ENetListIterator position) {
position->previous->next = position->next;
position->next->previous = position->previous;
return position;
}
ENetListIterator enet_list_move(ENetListIterator position, void* dataFirst, void* dataLast) {
ENetListIterator first = (ENetListIterator)dataFirst;
ENetListIterator last = (ENetListIterator)dataLast;
first->previous->next = last->next;
last->next->previous = first->previous;
first->previous = position->previous;
last->next = position;
first->previous->next = first;
position->previous = last;
return first;
}
size_t enet_list_size(ENetList* list) {
size_t size = 0;
ENetListIterator position;
for (position = enet_list_begin(list); position != enet_list_end(list); position = enet_list_next(position)) {
++size;
}
return size;
}
/*
=======================================================================
Utilities
=======================================================================
*/
ENetVersion enet_linked_version(void) {
return ENET_VERSION;
}
int enet_array_is_zeroed(const uint8_t* array, int length) {
size_t i;
for (i = 0; i < length; i++) {
if (array[i] != 0)
return -1;
}
return 0;
}
/*
=======================================================================
Time
=======================================================================
*/
#ifdef _WIN32
static LARGE_INTEGER gettime_offset(void) {
SYSTEMTIME s;
FILETIME f;
LARGE_INTEGER t;
s.wYear = 1970;
s.wMonth = 1;
s.wDay = 1;
s.wHour = 0;
s.wMinute = 0;
s.wSecond = 0;
s.wMilliseconds = 0;
SystemTimeToFileTime(&s, &f);
t.QuadPart = f.dwHighDateTime;
t.QuadPart <<= 32;
t.QuadPart |= f.dwLowDateTime;
return t;
}
int clock_gettime(int X, struct timespec* tv) {
LARGE_INTEGER t;
FILETIME f;
double microseconds;
static LARGE_INTEGER offset;
static double frequencyToMicroseconds;
static int initialized = 0;
static BOOL usePerformanceCounter = 0;
if (!initialized) {
LARGE_INTEGER performanceFrequency;
initialized = 1;
usePerformanceCounter = QueryPerformanceFrequency(&performanceFrequency);
if (usePerformanceCounter) {
QueryPerformanceCounter(&offset);
frequencyToMicroseconds = (double)performanceFrequency.QuadPart / 1000000.;
} else {
offset = gettime_offset();
frequencyToMicroseconds = 10.;
}
}
if (usePerformanceCounter) {
QueryPerformanceCounter(&t);
} else {
GetSystemTimeAsFileTime(&f);
t.QuadPart = f.dwHighDateTime;
t.QuadPart <<= 32;
t.QuadPart |= f.dwLowDateTime;
}
t.QuadPart -= offset.QuadPart;
microseconds = (double)t.QuadPart / frequencyToMicroseconds;
t.QuadPart = (LONGLONG)microseconds;
tv->tv_sec = (long)(t.QuadPart / 1000000);
tv->tv_nsec = t.QuadPart % 1000000 * 1000;
return 0;
}
#elif __APPLE__ && (__MAC_OS_X_VERSION_MIN_REQUIRED < 101200 || __IPHONE_OS_VERSION_MIN_REQUIRED < 100000) && !defined(CLOCK_MONOTONIC)
#define CLOCK_MONOTONIC 0
int clock_gettime(int X, struct timespec* ts) {
clock_serv_t cclock;
mach_timespec_t mts;
host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &cclock);
clock_get_time(cclock, &mts);
mach_port_deallocate(mach_task_self(), cclock);
ts->tv_sec = mts.tv_sec;
ts->tv_nsec = mts.tv_nsec;
return 0;
}
#endif
uint32_t enet_time_get(void) {
static uint64_t start_time_ns = 0;
struct timespec ts;
#ifdef CLOCK_MONOTONIC_RAW
clock_gettime(CLOCK_MONOTONIC_RAW, &ts);
#else
clock_gettime(CLOCK_MONOTONIC, &ts);
#endif
static const uint64_t ns_in_s = 1000 * 1000 * 1000;
static const uint64_t ns_in_ms = 1000 * 1000;
uint64_t current_time_ns = ts.tv_nsec + (uint64_t)ts.tv_sec * ns_in_s;
uint64_t offset_ns = ENET_ATOMIC_READ(&start_time_ns);
if (offset_ns == 0) {
uint64_t want_value = current_time_ns - 1 * ns_in_ms;
uint64_t old_value = ENET_ATOMIC_CAS(&start_time_ns, 0, want_value);
offset_ns = old_value == 0 ? want_value : old_value;
}
uint64_t result_in_ns = current_time_ns - offset_ns;
return (uint32_t)(result_in_ns / ns_in_ms);
}
/*
=======================================================================
Checksum
=======================================================================
*/
typedef uint64_t enet_checksum;
static const uint64_t crcTable[256] = {
UINT64_C(0x0000000000000000), UINT64_C(0x7ad870c830358979),
UINT64_C(0xf5b0e190606b12f2), UINT64_C(0x8f689158505e9b8b),
UINT64_C(0xc038e5739841b68f), UINT64_C(0xbae095bba8743ff6),
UINT64_C(0x358804e3f82aa47d), UINT64_C(0x4f50742bc81f2d04),
UINT64_C(0xab28ecb46814fe75), UINT64_C(0xd1f09c7c5821770c),
UINT64_C(0x5e980d24087fec87), UINT64_C(0x24407dec384a65fe),
UINT64_C(0x6b1009c7f05548fa), UINT64_C(0x11c8790fc060c183),
UINT64_C(0x9ea0e857903e5a08), UINT64_C(0xe478989fa00bd371),
UINT64_C(0x7d08ff3b88be6f81), UINT64_C(0x07d08ff3b88be6f8),
UINT64_C(0x88b81eabe8d57d73), UINT64_C(0xf2606e63d8e0f40a),
UINT64_C(0xbd301a4810ffd90e), UINT64_C(0xc7e86a8020ca5077),
UINT64_C(0x4880fbd87094cbfc), UINT64_C(0x32588b1040a14285),
UINT64_C(0xd620138fe0aa91f4), UINT64_C(0xacf86347d09f188d),
UINT64_C(0x2390f21f80c18306), UINT64_C(0x594882d7b0f40a7f),
UINT64_C(0x1618f6fc78eb277b), UINT64_C(0x6cc0863448deae02),
UINT64_C(0xe3a8176c18803589), UINT64_C(0x997067a428b5bcf0),
UINT64_C(0xfa11fe77117cdf02), UINT64_C(0x80c98ebf2149567b),
UINT64_C(0x0fa11fe77117cdf0), UINT64_C(0x75796f2f41224489),
UINT64_C(0x3a291b04893d698d), UINT64_C(0x40f16bccb908e0f4),
UINT64_C(0xcf99fa94e9567b7f), UINT64_C(0xb5418a5cd963f206),
UINT64_C(0x513912c379682177), UINT64_C(0x2be1620b495da80e),
UINT64_C(0xa489f35319033385), UINT64_C(0xde51839b2936bafc),
UINT64_C(0x9101f7b0e12997f8), UINT64_C(0xebd98778d11c1e81),
UINT64_C(0x64b116208142850a), UINT64_C(0x1e6966e8b1770c73),
UINT64_C(0x8719014c99c2b083), UINT64_C(0xfdc17184a9f739fa),
UINT64_C(0x72a9e0dcf9a9a271), UINT64_C(0x08719014c99c2b08),
UINT64_C(0x4721e43f0183060c), UINT64_C(0x3df994f731b68f75),
UINT64_C(0xb29105af61e814fe), UINT64_C(0xc849756751dd9d87),
UINT64_C(0x2c31edf8f1d64ef6), UINT64_C(0x56e99d30c1e3c78f),
UINT64_C(0xd9810c6891bd5c04), UINT64_C(0xa3597ca0a188d57d),
UINT64_C(0xec09088b6997f879), UINT64_C(0x96d1784359a27100),
UINT64_C(0x19b9e91b09fcea8b), UINT64_C(0x636199d339c963f2),
UINT64_C(0xdf7adabd7a6e2d6f), UINT64_C(0xa5a2aa754a5ba416),
UINT64_C(0x2aca3b2d1a053f9d), UINT64_C(0x50124be52a30b6e4),
UINT64_C(0x1f423fcee22f9be0), UINT64_C(0x659a4f06d21a1299),
UINT64_C(0xeaf2de5e82448912), UINT64_C(0x902aae96b271006b),
UINT64_C(0x74523609127ad31a), UINT64_C(0x0e8a46c1224f5a63),
UINT64_C(0x81e2d7997211c1e8), UINT64_C(0xfb3aa75142244891),
UINT64_C(0xb46ad37a8a3b6595), UINT64_C(0xceb2a3b2ba0eecec),
UINT64_C(0x41da32eaea507767), UINT64_C(0x3b024222da65fe1e),
UINT64_C(0xa2722586f2d042ee), UINT64_C(0xd8aa554ec2e5cb97),
UINT64_C(0x57c2c41692bb501c), UINT64_C(0x2d1ab4dea28ed965),
UINT64_C(0x624ac0f56a91f461), UINT64_C(0x1892b03d5aa47d18),
UINT64_C(0x97fa21650afae693), UINT64_C(0xed2251ad3acf6fea),
UINT64_C(0x095ac9329ac4bc9b), UINT64_C(0x7382b9faaaf135e2),
UINT64_C(0xfcea28a2faafae69), UINT64_C(0x8632586aca9a2710),
UINT64_C(0xc9622c4102850a14), UINT64_C(0xb3ba5c8932b0836d),
UINT64_C(0x3cd2cdd162ee18e6), UINT64_C(0x460abd1952db919f),
UINT64_C(0x256b24ca6b12f26d), UINT64_C(0x5fb354025b277b14),
UINT64_C(0xd0dbc55a0b79e09f), UINT64_C(0xaa03b5923b4c69e6),
UINT64_C(0xe553c1b9f35344e2), UINT64_C(0x9f8bb171c366cd9b),
UINT64_C(0x10e3202993385610), UINT64_C(0x6a3b50e1a30ddf69),
UINT64_C(0x8e43c87e03060c18), UINT64_C(0xf49bb8b633338561),
UINT64_C(0x7bf329ee636d1eea), UINT64_C(0x012b592653589793),
UINT64_C(0x4e7b2d0d9b47ba97), UINT64_C(0x34a35dc5ab7233ee),
UINT64_C(0xbbcbcc9dfb2ca865), UINT64_C(0xc113bc55cb19211c),
UINT64_C(0x5863dbf1e3ac9dec), UINT64_C(0x22bbab39d3991495),
UINT64_C(0xadd33a6183c78f1e), UINT64_C(0xd70b4aa9b3f20667),
UINT64_C(0x985b3e827bed2b63), UINT64_C(0xe2834e4a4bd8a21a),
UINT64_C(0x6debdf121b863991), UINT64_C(0x1733afda2bb3b0e8),
UINT64_C(0xf34b37458bb86399), UINT64_C(0x8993478dbb8deae0),
UINT64_C(0x06fbd6d5ebd3716b), UINT64_C(0x7c23a61ddbe6f812),
UINT64_C(0x3373d23613f9d516), UINT64_C(0x49aba2fe23cc5c6f),
UINT64_C(0xc6c333a67392c7e4), UINT64_C(0xbc1b436e43a74e9d),
UINT64_C(0x95ac9329ac4bc9b5), UINT64_C(0xef74e3e19c7e40cc),
UINT64_C(0x601c72b9cc20db47), UINT64_C(0x1ac40271fc15523e),
UINT64_C(0x5594765a340a7f3a), UINT64_C(0x2f4c0692043ff643),
UINT64_C(0xa02497ca54616dc8), UINT64_C(0xdafce7026454e4b1),
UINT64_C(0x3e847f9dc45f37c0), UINT64_C(0x445c0f55f46abeb9),
UINT64_C(0xcb349e0da4342532), UINT64_C(0xb1eceec59401ac4b),
UINT64_C(0xfebc9aee5c1e814f), UINT64_C(0x8464ea266c2b0836),
UINT64_C(0x0b0c7b7e3c7593bd), UINT64_C(0x71d40bb60c401ac4),
UINT64_C(0xe8a46c1224f5a634), UINT64_C(0x927c1cda14c02f4d),
UINT64_C(0x1d148d82449eb4c6), UINT64_C(0x67ccfd4a74ab3dbf),
UINT64_C(0x289c8961bcb410bb), UINT64_C(0x5244f9a98c8199c2),
UINT64_C(0xdd2c68f1dcdf0249), UINT64_C(0xa7f41839ecea8b30),
UINT64_C(0x438c80a64ce15841), UINT64_C(0x3954f06e7cd4d138),
UINT64_C(0xb63c61362c8a4ab3), UINT64_C(0xcce411fe1cbfc3ca),
UINT64_C(0x83b465d5d4a0eece), UINT64_C(0xf96c151de49567b7),
UINT64_C(0x76048445b4cbfc3c), UINT64_C(0x0cdcf48d84fe7545),
UINT64_C(0x6fbd6d5ebd3716b7), UINT64_C(0x15651d968d029fce),
UINT64_C(0x9a0d8ccedd5c0445), UINT64_C(0xe0d5fc06ed698d3c),
UINT64_C(0xaf85882d2576a038), UINT64_C(0xd55df8e515432941),
UINT64_C(0x5a3569bd451db2ca), UINT64_C(0x20ed197575283bb3),
UINT64_C(0xc49581ead523e8c2), UINT64_C(0xbe4df122e51661bb),
UINT64_C(0x3125607ab548fa30), UINT64_C(0x4bfd10b2857d7349),
UINT64_C(0x04ad64994d625e4d), UINT64_C(0x7e7514517d57d734),
UINT64_C(0xf11d85092d094cbf), UINT64_C(0x8bc5f5c11d3cc5c6),
UINT64_C(0x12b5926535897936), UINT64_C(0x686de2ad05bcf04f),
UINT64_C(0xe70573f555e26bc4), UINT64_C(0x9ddd033d65d7e2bd),
UINT64_C(0xd28d7716adc8cfb9), UINT64_C(0xa85507de9dfd46c0),
UINT64_C(0x273d9686cda3dd4b), UINT64_C(0x5de5e64efd965432),
UINT64_C(0xb99d7ed15d9d8743), UINT64_C(0xc3450e196da80e3a),
UINT64_C(0x4c2d9f413df695b1), UINT64_C(0x36f5ef890dc31cc8),
UINT64_C(0x79a59ba2c5dc31cc), UINT64_C(0x037deb6af5e9b8b5),
UINT64_C(0x8c157a32a5b7233e), UINT64_C(0xf6cd0afa9582aa47),
UINT64_C(0x4ad64994d625e4da), UINT64_C(0x300e395ce6106da3),
UINT64_C(0xbf66a804b64ef628), UINT64_C(0xc5bed8cc867b7f51),
UINT64_C(0x8aeeace74e645255), UINT64_C(0xf036dc2f7e51db2c),
UINT64_C(0x7f5e4d772e0f40a7), UINT64_C(0x05863dbf1e3ac9de),
UINT64_C(0xe1fea520be311aaf), UINT64_C(0x9b26d5e88e0493d6),
UINT64_C(0x144e44b0de5a085d), UINT64_C(0x6e963478ee6f8124),
UINT64_C(0x21c640532670ac20), UINT64_C(0x5b1e309b16452559),
UINT64_C(0xd476a1c3461bbed2), UINT64_C(0xaeaed10b762e37ab),
UINT64_C(0x37deb6af5e9b8b5b), UINT64_C(0x4d06c6676eae0222),
UINT64_C(0xc26e573f3ef099a9), UINT64_C(0xb8b627f70ec510d0),
UINT64_C(0xf7e653dcc6da3dd4), UINT64_C(0x8d3e2314f6efb4ad),
UINT64_C(0x0256b24ca6b12f26), UINT64_C(0x788ec2849684a65f),
UINT64_C(0x9cf65a1b368f752e), UINT64_C(0xe62e2ad306bafc57),
UINT64_C(0x6946bb8b56e467dc), UINT64_C(0x139ecb4366d1eea5),
UINT64_C(0x5ccebf68aecec3a1), UINT64_C(0x2616cfa09efb4ad8),
UINT64_C(0xa97e5ef8cea5d153), UINT64_C(0xd3a62e30fe90582a),
UINT64_C(0xb0c7b7e3c7593bd8), UINT64_C(0xca1fc72bf76cb2a1),
UINT64_C(0x45775673a732292a), UINT64_C(0x3faf26bb9707a053),
UINT64_C(0x70ff52905f188d57), UINT64_C(0x0a2722586f2d042e),
UINT64_C(0x854fb3003f739fa5), UINT64_C(0xff97c3c80f4616dc),
UINT64_C(0x1bef5b57af4dc5ad), UINT64_C(0x61372b9f9f784cd4),
UINT64_C(0xee5fbac7cf26d75f), UINT64_C(0x9487ca0fff135e26),
UINT64_C(0xdbd7be24370c7322), UINT64_C(0xa10fceec0739fa5b),
UINT64_C(0x2e675fb4576761d0), UINT64_C(0x54bf2f7c6752e8a9),
UINT64_C(0xcdcf48d84fe75459), UINT64_C(0xb71738107fd2dd20),
UINT64_C(0x387fa9482f8c46ab), UINT64_C(0x42a7d9801fb9cfd2),
UINT64_C(0x0df7adabd7a6e2d6), UINT64_C(0x772fdd63e7936baf),
UINT64_C(0xf8474c3bb7cdf024), UINT64_C(0x829f3cf387f8795d),
UINT64_C(0x66e7a46c27f3aa2c), UINT64_C(0x1c3fd4a417c62355),
UINT64_C(0x935745fc4798b8de), UINT64_C(0xe98f353477ad31a7),
UINT64_C(0xa6df411fbfb21ca3), UINT64_C(0xdc0731d78f8795da),
UINT64_C(0x536fa08fdfd90e51), UINT64_C(0x29b7d047efec8728),
};
uint64_t enet_crc64(const ENetBuffer* buffers, int bufferCount) {
uint64_t crc = 0xFFFFFFFFFFFFFFFF;
while (bufferCount-- > 0) {
const uint8_t* data = (const uint8_t*)buffers->data;
const uint8_t* dataEnd = &data[buffers->dataLength];
while (data < dataEnd) {
crc = (crc >> 8) ^ crcTable[(uint8_t)crc ^* data++];
}
++buffers;
}
return ENET_HOST_TO_NET_64(~crc);
}
/*
=======================================================================
Packet
=======================================================================
*/
ENetPacket* enet_packet_create(const void* data, size_t dataLength, uint32_t flags) {
ENetPacket* packet;
if (flags & ENET_PACKET_FLAG_NO_ALLOCATE) {
packet = (ENetPacket*)enet_malloc(sizeof(ENetPacket));
if (packet == NULL)
return NULL;
packet->data = (uint8_t*)data;
} else {
packet = (ENetPacket*)enet_malloc(sizeof(ENetPacket) + dataLength);
if (packet == NULL)
return NULL;
packet->data = (uint8_t*)packet + sizeof(ENetPacket);
if (data != NULL)
memcpy(packet->data, data, dataLength);
}
packet->referenceCount = 0;
packet->flags = flags;
packet->dataLength = dataLength;
packet->freeCallback = NULL;
packet->userData = NULL;
return packet;
}
ENetPacket* enet_packet_create_offset(const void* data, size_t dataLength, size_t dataOffset, uint32_t flags) {
ENetPacket* packet;
if (flags & ENET_PACKET_FLAG_NO_ALLOCATE) {
packet = (ENetPacket*)enet_malloc(sizeof(ENetPacket));
if (packet == NULL)
return NULL;
packet->data = (uint8_t*)data;
} else {
packet = (ENetPacket*)enet_malloc(sizeof(ENetPacket) + dataLength - dataOffset);
if (packet == NULL)
return NULL;
packet->data = (uint8_t*)packet + sizeof(ENetPacket);
if (data != NULL)
memcpy(packet->data, (char*)data + dataOffset, dataLength - dataOffset);
}
packet->referenceCount = 0;
packet->flags = flags;
packet->dataLength = dataLength - dataOffset;
packet->freeCallback = NULL;
packet->userData = NULL;
return packet;
}
void enet_packet_destroy(ENetPacket* packet) {
if (packet == NULL)
return;
if (packet->freeCallback != NULL)
(*packet->freeCallback)((void*)packet);
enet_free(packet);
}
/*
=======================================================================
Protocol
=======================================================================
*/
static size_t commandSizes[ENET_PROTOCOL_COMMAND_COUNT] = {
0,
sizeof(ENetProtocolAcknowledge),
sizeof(ENetProtocolConnect),
sizeof(ENetProtocolVerifyConnect),
sizeof(ENetProtocolDisconnect),
sizeof(ENetProtocolPing),
sizeof(ENetProtocolSendReliable),
sizeof(ENetProtocolSendUnreliable),
sizeof(ENetProtocolSendFragment),
sizeof(ENetProtocolSendUnsequenced),
sizeof(ENetProtocolBandwidthLimit),
sizeof(ENetProtocolThrottleConfigure),
sizeof(ENetProtocolSendFragment)
};
size_t enet_protocol_command_size(uint8_t commandNumber) {
return commandSizes[commandNumber & ENET_PROTOCOL_COMMAND_MASK];
}
static void enet_protocol_change_state(ENetHost* host, ENetPeer* peer, ENetPeerState state) {
if (state == ENET_PEER_STATE_CONNECTED || state == ENET_PEER_STATE_DISCONNECT_LATER)
enet_peer_on_connect(peer);
else
enet_peer_on_disconnect(peer);
peer->state = state;
}
static void enet_protocol_dispatch_state(ENetHost* host, ENetPeer* peer, ENetPeerState state) {
enet_protocol_change_state(host, peer, state);
if (!peer->needsDispatch) {
enet_list_insert(enet_list_end(&host->dispatchQueue), &peer->dispatchList);
peer->needsDispatch = 1;
}
}
static int enet_protocol_dispatch_incoming_commands(ENetHost* host, ENetEvent* event) {
while (!enet_list_empty(&host->dispatchQueue)) {
ENetPeer* peer = (ENetPeer*)enet_list_remove(enet_list_begin(&host->dispatchQueue));
peer->needsDispatch = 0;
switch (peer->state) {
case ENET_PEER_STATE_CONNECTION_PENDING:
case ENET_PEER_STATE_CONNECTION_SUCCEEDED:
enet_protocol_change_state(host, peer, ENET_PEER_STATE_CONNECTED);
event->type = ENET_EVENT_TYPE_CONNECT;
event->peer = peer;
event->data = peer->eventData;
return 1;
case ENET_PEER_STATE_ZOMBIE:
host->recalculateBandwidthLimits = 1;
event->type = ENET_EVENT_TYPE_DISCONNECT;
event->peer = peer;
event->data = peer->eventData;
enet_peer_reset(peer);
return 1;
case ENET_PEER_STATE_CONNECTED:
if (enet_list_empty(&peer->dispatchedCommands))
continue;
event->packet = enet_peer_receive(peer, &event->channelID);
if (event->packet == NULL)
continue;
event->type = ENET_EVENT_TYPE_RECEIVE;
event->peer = peer;
if (!enet_list_empty(&peer->dispatchedCommands)) {
peer->needsDispatch = 1;
enet_list_insert(enet_list_end(&host->dispatchQueue), &peer->dispatchList);
}
return 1;
default:
break;
}
}
return 0;
}
static void enet_protocol_notify_connect(ENetHost* host, ENetPeer* peer, ENetEvent* event) {
host->recalculateBandwidthLimits = 1;
if (event != NULL) {
enet_protocol_change_state(host, peer, ENET_PEER_STATE_CONNECTED);
peer->totalDataSent = 0;
peer->totalDataReceived = 0;
peer->totalPacketsSent = 0;
peer->totalPacketsLost = 0;
event->type = ENET_EVENT_TYPE_CONNECT;
event->peer = peer;
event->data = peer->eventData;
} else {
enet_protocol_dispatch_state(host, peer, peer->state == ENET_PEER_STATE_CONNECTING ? ENET_PEER_STATE_CONNECTION_SUCCEEDED : ENET_PEER_STATE_CONNECTION_PENDING);
}
}
static void enet_protocol_notify_disconnect(ENetHost* host, ENetPeer* peer, ENetEvent* event) {
if (peer->state >= ENET_PEER_STATE_CONNECTION_PENDING)
host->recalculateBandwidthLimits = 1;
if (peer->state != ENET_PEER_STATE_CONNECTING && peer->state < ENET_PEER_STATE_CONNECTION_SUCCEEDED) {
enet_peer_reset(peer);
} else if (event != NULL) {
event->type = ENET_EVENT_TYPE_DISCONNECT;
event->peer = peer;
event->data = 0;
enet_peer_reset(peer);
} else {
peer->eventData = 0;
enet_protocol_dispatch_state(host, peer, ENET_PEER_STATE_ZOMBIE);
}
}
static void enet_protocol_notify_disconnect_timeout(ENetHost* host, ENetPeer* peer, ENetEvent* event) {
if (peer->state >= ENET_PEER_STATE_CONNECTION_PENDING)
host->recalculateBandwidthLimits = 1;
if (peer->state != ENET_PEER_STATE_CONNECTING && peer->state < ENET_PEER_STATE_CONNECTION_SUCCEEDED) {
enet_peer_reset(peer);
} else if (event != NULL) {
event->type = ENET_EVENT_TYPE_DISCONNECT_TIMEOUT;
event->peer = peer;
event->data = 0;
enet_peer_reset(peer);
} else {
peer->eventData = 0;
enet_protocol_dispatch_state(host, peer, ENET_PEER_STATE_ZOMBIE);
}
}
static void enet_protocol_remove_sent_unreliable_commands(ENetPeer* peer) {
ENetOutgoingCommand* outgoingCommand;
if (enet_list_empty(&peer->sentUnreliableCommands))
return;
do {
outgoingCommand = (ENetOutgoingCommand*)enet_list_front(&peer->sentUnreliableCommands);
enet_list_remove(&outgoingCommand->outgoingCommandList);
if (outgoingCommand->packet != NULL) {
--outgoingCommand->packet->referenceCount;
if (outgoingCommand->packet->referenceCount == 0) {
outgoingCommand->packet->flags |= ENET_PACKET_FLAG_SENT;
enet_packet_destroy(outgoingCommand->packet);
}
}
enet_free(outgoingCommand);
}
while (!enet_list_empty(&peer->sentUnreliableCommands));
if (peer->state == ENET_PEER_STATE_DISCONNECT_LATER && enet_list_empty(&peer->outgoingCommands) && enet_list_empty(&peer->sentReliableCommands))
enet_peer_disconnect(peer, peer->eventData);
}
static ENetProtocolCommand enet_protocol_remove_sent_reliable_command(ENetPeer* peer, uint16_t reliableSequenceNumber, uint8_t channelID) {
ENetOutgoingCommand* outgoingCommand = NULL;
ENetListIterator currentCommand;
ENetProtocolCommand commandNumber;
int wasSent = 1;
for (currentCommand = enet_list_begin(&peer->sentReliableCommands); currentCommand != enet_list_end(&peer->sentReliableCommands); currentCommand = enet_list_next(currentCommand)) {
outgoingCommand = (ENetOutgoingCommand*)currentCommand;
if (outgoingCommand->reliableSequenceNumber == reliableSequenceNumber && outgoingCommand->command.header.channelID == channelID)
break;
}
if (currentCommand == enet_list_end(&peer->sentReliableCommands)) {
for (currentCommand = enet_list_begin(&peer->outgoingCommands); currentCommand != enet_list_end(&peer->outgoingCommands); currentCommand = enet_list_next(currentCommand)) {
outgoingCommand = (ENetOutgoingCommand*)currentCommand;
if (outgoingCommand->sendAttempts < 1)
return ENET_PROTOCOL_COMMAND_NONE;
if (outgoingCommand->reliableSequenceNumber == reliableSequenceNumber && outgoingCommand->command.header.channelID == channelID)
break;
}
if (currentCommand == enet_list_end(&peer->outgoingCommands))
return ENET_PROTOCOL_COMMAND_NONE;
wasSent = 0;
}
if (outgoingCommand == NULL)
return ENET_PROTOCOL_COMMAND_NONE;
if (channelID < peer->channelCount) {
ENetChannel* channel = &peer->channels[channelID];
uint16_t reliableWindow = reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
if (channel->reliableWindows[reliableWindow] > 0) {
--channel->reliableWindows[reliableWindow];
if (!channel->reliableWindows[reliableWindow])
channel->usedReliableWindows &= ~(1 << reliableWindow);
}
}
commandNumber = (ENetProtocolCommand)(outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK);
enet_list_remove(&outgoingCommand->outgoingCommandList);
if (outgoingCommand->packet != NULL) {
if (wasSent)
peer->reliableDataInTransit -= outgoingCommand->fragmentLength;
--outgoingCommand->packet->referenceCount;
if (outgoingCommand->packet->referenceCount == 0) {
outgoingCommand->packet->flags |= ENET_PACKET_FLAG_SENT;
enet_packet_destroy(outgoingCommand->packet);
}
}
enet_free(outgoingCommand);
if (enet_list_empty(&peer->sentReliableCommands))
return commandNumber;
outgoingCommand = (ENetOutgoingCommand*)enet_list_front(&peer->sentReliableCommands);
peer->nextTimeout = outgoingCommand->sentTime + outgoingCommand->roundTripTimeout;
return commandNumber;
}
static ENetPeer* enet_protocol_handle_connect(ENetHost* host, ENetProtocolHeader* header, ENetProtocol* command) {
uint8_t incomingSessionID, outgoingSessionID;
uint32_t mtu, windowSize;
ENetChannel* channel;
size_t channelCount, duplicatePeers = 0;
ENetPeer* currentPeer, *peer = NULL;
ENetProtocol verifyCommand;
channelCount = ENET_NET_TO_HOST_32(command->connect.channelCount);
if (channelCount < ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT || channelCount > ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT)
return NULL;
for (currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
if (currentPeer->state == ENET_PEER_STATE_DISCONNECTED) {
if (peer == NULL)
peer = currentPeer;
} else if (currentPeer->state != ENET_PEER_STATE_CONNECTING && enet_in6_equal(currentPeer->address.ipv6, host->receivedAddress.ipv6)) {
if (currentPeer->address.port == host->receivedAddress.port && currentPeer->connectID == command->connect.connectID)
return NULL;
++duplicatePeers;
}
}
if (peer == NULL || duplicatePeers >= host->duplicatePeers)
return NULL;
if (channelCount > host->channelLimit)
channelCount = host->channelLimit;
peer->channels = (ENetChannel*)enet_malloc(channelCount * sizeof(ENetChannel));
if (peer->channels == NULL)
return NULL;
peer->channelCount = channelCount;
peer->state = ENET_PEER_STATE_ACKNOWLEDGING_CONNECT;
peer->connectID = command->connect.connectID;
peer->address = host->receivedAddress;
peer->outgoingPeerID = ENET_NET_TO_HOST_16(command->connect.outgoingPeerID);
peer->incomingBandwidth = ENET_NET_TO_HOST_32(command->connect.incomingBandwidth);
peer->outgoingBandwidth = ENET_NET_TO_HOST_32(command->connect.outgoingBandwidth);
peer->packetThrottleInterval = ENET_NET_TO_HOST_32(command->connect.packetThrottleInterval);
peer->packetThrottleAcceleration = ENET_NET_TO_HOST_32(command->connect.packetThrottleAcceleration);
peer->packetThrottleDeceleration = ENET_NET_TO_HOST_32(command->connect.packetThrottleDeceleration);
peer->eventData = ENET_NET_TO_HOST_32(command->connect.data);
incomingSessionID = command->connect.incomingSessionID == 0xFF ? peer->outgoingSessionID : command->connect.incomingSessionID;
incomingSessionID = (incomingSessionID + 1) & (ENET_PROTOCOL_HEADER_SESSION_MASK >> ENET_PROTOCOL_HEADER_SESSION_SHIFT);
if (incomingSessionID == peer->outgoingSessionID)
incomingSessionID = (incomingSessionID + 1) & (ENET_PROTOCOL_HEADER_SESSION_MASK >> ENET_PROTOCOL_HEADER_SESSION_SHIFT);
peer->outgoingSessionID = incomingSessionID;
outgoingSessionID = command->connect.outgoingSessionID == 0xFF ? peer->incomingSessionID : command->connect.outgoingSessionID;
outgoingSessionID = (outgoingSessionID + 1) & (ENET_PROTOCOL_HEADER_SESSION_MASK >> ENET_PROTOCOL_HEADER_SESSION_SHIFT);
if (outgoingSessionID == peer->incomingSessionID)
outgoingSessionID = (outgoingSessionID + 1) & (ENET_PROTOCOL_HEADER_SESSION_MASK >> ENET_PROTOCOL_HEADER_SESSION_SHIFT);
peer->incomingSessionID = outgoingSessionID;
for (channel = peer->channels; channel < &peer->channels[channelCount]; ++channel) {
channel->outgoingReliableSequenceNumber = 0;
channel->outgoingUnreliableSequenceNumber = 0;
channel->incomingReliableSequenceNumber = 0;
channel->incomingUnreliableSequenceNumber = 0;
enet_list_clear(&channel->incomingReliableCommands);
enet_list_clear(&channel->incomingUnreliableCommands);
channel->usedReliableWindows = 0;
memset(channel->reliableWindows, 0, sizeof(channel->reliableWindows));
}
mtu = ENET_NET_TO_HOST_32(command->connect.mtu);
if (mtu < ENET_PROTOCOL_MINIMUM_MTU)
mtu = ENET_PROTOCOL_MINIMUM_MTU;
else if (mtu > ENET_PROTOCOL_MAXIMUM_MTU)
mtu = ENET_PROTOCOL_MAXIMUM_MTU;
peer->mtu = mtu;
if (host->outgoingBandwidth == 0 && peer->incomingBandwidth == 0)
peer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
else if (host->outgoingBandwidth == 0 || peer->incomingBandwidth == 0)
peer->windowSize = (ENET_MAX(host->outgoingBandwidth, peer->incomingBandwidth) / ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
else
peer->windowSize = (ENET_MIN(host->outgoingBandwidth, peer->incomingBandwidth) / ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
if (peer->windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
peer->windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
else if (peer->windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
peer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
if (host->incomingBandwidth == 0)
windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
else
windowSize = (host->incomingBandwidth / ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
if (windowSize > ENET_NET_TO_HOST_32(command->connect.windowSize))
windowSize = ENET_NET_TO_HOST_32(command->connect.windowSize);
if (windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
else if (windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
verifyCommand.header.command = ENET_PROTOCOL_COMMAND_VERIFY_CONNECT | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
verifyCommand.header.channelID = 0xFF;
verifyCommand.verifyConnect.outgoingPeerID = ENET_HOST_TO_NET_16(peer->incomingPeerID);
verifyCommand.verifyConnect.incomingSessionID = incomingSessionID;
verifyCommand.verifyConnect.outgoingSessionID = outgoingSessionID;
verifyCommand.verifyConnect.mtu = ENET_HOST_TO_NET_32(peer->mtu);
verifyCommand.verifyConnect.windowSize = ENET_HOST_TO_NET_32(windowSize);
verifyCommand.verifyConnect.channelCount = ENET_HOST_TO_NET_32(channelCount);
verifyCommand.verifyConnect.incomingBandwidth = ENET_HOST_TO_NET_32(host->incomingBandwidth);
verifyCommand.verifyConnect.outgoingBandwidth = ENET_HOST_TO_NET_32(host->outgoingBandwidth);
verifyCommand.verifyConnect.packetThrottleInterval = ENET_HOST_TO_NET_32(peer->packetThrottleInterval);
verifyCommand.verifyConnect.packetThrottleAcceleration = ENET_HOST_TO_NET_32(peer->packetThrottleAcceleration);
verifyCommand.verifyConnect.packetThrottleDeceleration = ENET_HOST_TO_NET_32(peer->packetThrottleDeceleration);
verifyCommand.verifyConnect.connectID = peer->connectID;
enet_peer_queue_outgoing_command(peer, &verifyCommand, NULL, 0, 0);
return peer;
}
static int enet_protocol_handle_send_reliable(ENetHost* host, ENetPeer* peer, const ENetProtocol* command, uint8_t** currentData) {
size_t dataLength;
if (command->header.channelID >= peer->channelCount || (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER))
return -1;
dataLength = ENET_NET_TO_HOST_16(command->sendReliable.dataLength);
*currentData += dataLength;
if (dataLength > host->maximumPacketSize || *currentData < host->receivedData || *currentData > &host->receivedData[host->receivedDataLength])
return -1;
if (enet_peer_queue_incoming_command(peer, command, (const uint8_t*)command + sizeof(ENetProtocolSendReliable), dataLength, ENET_PACKET_FLAG_RELIABLE, 0) == NULL)
return -1;
return 0;
}
static int enet_protocol_handle_send_unsequenced(ENetHost* host, ENetPeer* peer, const ENetProtocol* command, uint8_t** currentData) {
uint32_t unsequencedGroup, index;
size_t dataLength;
if (command->header.channelID >= peer->channelCount || (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER))
return -1;
dataLength = ENET_NET_TO_HOST_16(command->sendUnsequenced.dataLength);
*currentData += dataLength;
if (dataLength > host->maximumPacketSize || *currentData < host->receivedData || *currentData > &host->receivedData[host->receivedDataLength])
return -1;
unsequencedGroup = ENET_NET_TO_HOST_16(command->sendUnsequenced.unsequencedGroup);
index = unsequencedGroup % ENET_PEER_UNSEQUENCED_WINDOW_SIZE;
if (unsequencedGroup < peer->incomingUnsequencedGroup)
unsequencedGroup += 0x10000;
if (unsequencedGroup >= (uint32_t)peer->incomingUnsequencedGroup + ENET_PEER_FREE_UNSEQUENCED_WINDOWS * ENET_PEER_UNSEQUENCED_WINDOW_SIZE)
return 0;
unsequencedGroup &= 0xFFFF;
if (unsequencedGroup - index != peer->incomingUnsequencedGroup) {
peer->incomingUnsequencedGroup = unsequencedGroup - index;
memset(peer->unsequencedWindow, 0, sizeof(peer->unsequencedWindow));
} else if (peer->unsequencedWindow[index / 32] & (1 << (index % 32))) {
return 0;
}
if (enet_peer_queue_incoming_command(peer, command, (const uint8_t*)command + sizeof(ENetProtocolSendUnsequenced), dataLength, ENET_PACKET_FLAG_UNSEQUENCED, 0) == NULL)
return -1;
peer->unsequencedWindow[index / 32] |= 1 << (index % 32);
return 0;
}
static int enet_protocol_handle_send_unreliable(ENetHost* host, ENetPeer* peer, const ENetProtocol* command, uint8_t** currentData) {
size_t dataLength;
if (command->header.channelID >= peer->channelCount || (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER))
return -1;
dataLength = ENET_NET_TO_HOST_16(command->sendUnreliable.dataLength);
*currentData += dataLength;
if (dataLength > host->maximumPacketSize || *currentData < host->receivedData || *currentData > &host->receivedData[host->receivedDataLength])
return -1;
if (enet_peer_queue_incoming_command(peer, command, (const uint8_t*)command + sizeof(ENetProtocolSendUnreliable), dataLength, 0, 0) == NULL)
return -1;
return 0;
}
static int enet_protocol_handle_send_fragment(ENetHost* host, ENetPeer* peer, const ENetProtocol* command, uint8_t** currentData) {
uint32_t fragmentNumber, fragmentCount, fragmentOffset, fragmentLength, startSequenceNumber, totalLength;
ENetChannel* channel;
uint16_t startWindow, currentWindow;
ENetListIterator currentCommand;
ENetIncomingCommand* startCommand = NULL;
if (command->header.channelID >= peer->channelCount || (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER))
return -1;
fragmentLength = ENET_NET_TO_HOST_16(command->sendFragment.dataLength);
*currentData += fragmentLength;
if (fragmentLength > host->maximumPacketSize || *currentData < host->receivedData || *currentData > &host->receivedData[host->receivedDataLength])
return -1;
channel = &peer->channels[command->header.channelID];
startSequenceNumber = ENET_NET_TO_HOST_16(command->sendFragment.startSequenceNumber);
startWindow = startSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
currentWindow = channel->incomingReliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
if (startSequenceNumber < channel->incomingReliableSequenceNumber)
startWindow += ENET_PEER_RELIABLE_WINDOWS;
if (startWindow < currentWindow || startWindow >= currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS - 1)
return 0;
fragmentNumber = ENET_NET_TO_HOST_32(command->sendFragment.fragmentNumber);
fragmentCount = ENET_NET_TO_HOST_32(command->sendFragment.fragmentCount);
fragmentOffset = ENET_NET_TO_HOST_32(command->sendFragment.fragmentOffset);
totalLength = ENET_NET_TO_HOST_32(command->sendFragment.totalLength);
if (fragmentCount > ENET_PROTOCOL_MAXIMUM_FRAGMENT_COUNT || fragmentNumber >= fragmentCount || totalLength > host->maximumPacketSize || fragmentOffset >= totalLength || fragmentLength > totalLength - fragmentOffset)
return -1;
for (currentCommand = enet_list_previous(enet_list_end(&channel->incomingReliableCommands)); currentCommand != enet_list_end(&channel->incomingReliableCommands); currentCommand = enet_list_previous(currentCommand)) {
ENetIncomingCommand* incomingCommand = (ENetIncomingCommand*)currentCommand;
if (startSequenceNumber >= channel->incomingReliableSequenceNumber) {
if (incomingCommand->reliableSequenceNumber < channel->incomingReliableSequenceNumber)
continue;
} else if (incomingCommand->reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
break;
}
if (incomingCommand->reliableSequenceNumber <= startSequenceNumber) {
if (incomingCommand->reliableSequenceNumber < startSequenceNumber)
break;
if ((incomingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK) != ENET_PROTOCOL_COMMAND_SEND_FRAGMENT || totalLength != incomingCommand->packet->dataLength || fragmentCount != incomingCommand->fragmentCount)
return -1;
startCommand = incomingCommand;
break;
}
}
if (startCommand == NULL) {
ENetProtocol hostCommand = *command;
hostCommand.header.reliableSequenceNumber = startSequenceNumber;
startCommand = enet_peer_queue_incoming_command(peer, &hostCommand, NULL, totalLength, ENET_PACKET_FLAG_RELIABLE, fragmentCount);
if (startCommand == NULL)
return -1;
}
if ((startCommand->fragments[fragmentNumber / 32] & (1 << (fragmentNumber % 32))) == 0) {
--startCommand->fragmentsRemaining;
startCommand->fragments[fragmentNumber / 32] |= (1 << (fragmentNumber % 32));
if (fragmentOffset + fragmentLength > startCommand->packet->dataLength)
fragmentLength = startCommand->packet->dataLength - fragmentOffset;
memcpy(startCommand->packet->data + fragmentOffset, (uint8_t*)command + sizeof(ENetProtocolSendFragment), fragmentLength);
if (startCommand->fragmentsRemaining <= 0)
enet_peer_dispatch_incoming_reliable_commands(peer, channel, NULL);
}
return 0;
}
static int enet_protocol_handle_send_unreliable_fragment(ENetHost* host, ENetPeer* peer, const ENetProtocol* command, uint8_t** currentData) {
uint32_t fragmentNumber, fragmentCount, fragmentOffset, fragmentLength, reliableSequenceNumber, startSequenceNumber, totalLength;
uint16_t reliableWindow, currentWindow;
ENetChannel* channel;
ENetListIterator currentCommand;
ENetIncomingCommand* startCommand = NULL;
if (command->header.channelID >= peer->channelCount || (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER))
return -1;
fragmentLength = ENET_NET_TO_HOST_16(command->sendFragment.dataLength);
*currentData += fragmentLength;
if (fragmentLength > host->maximumPacketSize || *currentData < host->receivedData || *currentData > &host->receivedData[host->receivedDataLength])
return -1;
channel = &peer->channels[command->header.channelID];
reliableSequenceNumber = command->header.reliableSequenceNumber;
startSequenceNumber = ENET_NET_TO_HOST_16(command->sendFragment.startSequenceNumber);
reliableWindow = reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
currentWindow = channel->incomingReliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
if (reliableSequenceNumber < channel->incomingReliableSequenceNumber)
reliableWindow += ENET_PEER_RELIABLE_WINDOWS;
if (reliableWindow < currentWindow || reliableWindow >= currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS - 1)
return 0;
if (reliableSequenceNumber == channel->incomingReliableSequenceNumber && startSequenceNumber <= channel->incomingUnreliableSequenceNumber)
return 0;
fragmentNumber = ENET_NET_TO_HOST_32(command->sendFragment.fragmentNumber);
fragmentCount = ENET_NET_TO_HOST_32(command->sendFragment.fragmentCount);
fragmentOffset = ENET_NET_TO_HOST_32(command->sendFragment.fragmentOffset);
totalLength = ENET_NET_TO_HOST_32(command->sendFragment.totalLength);
if (fragmentCount > ENET_PROTOCOL_MAXIMUM_FRAGMENT_COUNT || fragmentNumber >= fragmentCount || totalLength > host->maximumPacketSize || fragmentOffset >= totalLength || fragmentLength > totalLength - fragmentOffset)
return -1;
for (currentCommand = enet_list_previous(enet_list_end(&channel->incomingUnreliableCommands)); currentCommand != enet_list_end(&channel->incomingUnreliableCommands); currentCommand = enet_list_previous(currentCommand)) {
ENetIncomingCommand* incomingCommand = (ENetIncomingCommand*)currentCommand;
if (reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
if (incomingCommand->reliableSequenceNumber < channel->incomingReliableSequenceNumber)
continue;
} else if (incomingCommand->reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
break;
}
if (incomingCommand->reliableSequenceNumber < reliableSequenceNumber)
break;
if (incomingCommand->reliableSequenceNumber > reliableSequenceNumber)
continue;
if (incomingCommand->unreliableSequenceNumber <= startSequenceNumber) {
if (incomingCommand->unreliableSequenceNumber < startSequenceNumber)
break;
if ((incomingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK) != ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE_FRAGMENT || totalLength != incomingCommand->packet->dataLength || fragmentCount != incomingCommand->fragmentCount)
return -1;
startCommand = incomingCommand;
break;
}
}
if (startCommand == NULL) {
startCommand = enet_peer_queue_incoming_command(peer, command, NULL, totalLength, ENET_PACKET_FLAG_UNRELIABLE_FRAGMENTED, fragmentCount);
if (startCommand == NULL)
return -1;
}
if ((startCommand->fragments[fragmentNumber / 32] & (1 << (fragmentNumber % 32))) == 0) {
--startCommand->fragmentsRemaining;
startCommand->fragments[fragmentNumber / 32] |= (1 << (fragmentNumber % 32));
if (fragmentOffset + fragmentLength > startCommand->packet->dataLength)
fragmentLength = startCommand->packet->dataLength - fragmentOffset;
memcpy(startCommand->packet->data + fragmentOffset, (uint8_t*)command + sizeof(ENetProtocolSendFragment), fragmentLength);
if (startCommand->fragmentsRemaining <= 0)
enet_peer_dispatch_incoming_unreliable_commands(peer, channel, NULL);
}
return 0;
}
static int enet_protocol_handle_ping(ENetHost* host, ENetPeer* peer, const ENetProtocol* command) {
if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)
return -1;
return 0;
}
static int enet_protocol_handle_bandwidth_limit(ENetHost* host, ENetPeer* peer, const ENetProtocol* command) {
if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)
return -1;
if (peer->incomingBandwidth != 0)
--host->bandwidthLimitedPeers;
peer->incomingBandwidth = ENET_NET_TO_HOST_32(command->bandwidthLimit.incomingBandwidth);
peer->outgoingBandwidth = ENET_NET_TO_HOST_32(command->bandwidthLimit.outgoingBandwidth);
if (peer->incomingBandwidth != 0)
++host->bandwidthLimitedPeers;
if (peer->incomingBandwidth == 0 && host->outgoingBandwidth == 0)
peer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
else if (peer->incomingBandwidth == 0 || host->outgoingBandwidth == 0)
peer->windowSize = (ENET_MAX(peer->incomingBandwidth, host->outgoingBandwidth) / ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
else
peer->windowSize = (ENET_MIN(peer->incomingBandwidth, host->outgoingBandwidth) / ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
if (peer->windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
peer->windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
else if (peer->windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
peer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
return 0;
}
static int enet_protocol_handle_throttle_configure(ENetHost* host, ENetPeer* peer, const ENetProtocol* command) {
if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)
return -1;
peer->packetThrottleInterval = ENET_NET_TO_HOST_32(command->throttleConfigure.packetThrottleInterval);
peer->packetThrottleAcceleration = ENET_NET_TO_HOST_32(command->throttleConfigure.packetThrottleAcceleration);
peer->packetThrottleDeceleration = ENET_NET_TO_HOST_32(command->throttleConfigure.packetThrottleDeceleration);
return 0;
}
static int enet_protocol_handle_disconnect(ENetHost* host, ENetPeer* peer, const ENetProtocol* command) {
if (peer->state == ENET_PEER_STATE_DISCONNECTED || peer->state == ENET_PEER_STATE_ZOMBIE || peer->state == ENET_PEER_STATE_ACKNOWLEDGING_DISCONNECT)
return 0;
enet_peer_reset_queues(peer);
if (peer->state == ENET_PEER_STATE_CONNECTION_SUCCEEDED || peer->state == ENET_PEER_STATE_DISCONNECTING || peer->state == ENET_PEER_STATE_CONNECTING) {
enet_protocol_dispatch_state(host, peer, ENET_PEER_STATE_ZOMBIE);
} else if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) {
if (peer->state == ENET_PEER_STATE_CONNECTION_PENDING)
host->recalculateBandwidthLimits = 1;
enet_peer_reset(peer);
} else if (command->header.command & ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE) {
enet_protocol_change_state(host, peer, ENET_PEER_STATE_ACKNOWLEDGING_DISCONNECT);
} else {
enet_protocol_dispatch_state(host, peer, ENET_PEER_STATE_ZOMBIE);
}
if (peer->state != ENET_PEER_STATE_DISCONNECTED)
peer->eventData = ENET_NET_TO_HOST_32(command->disconnect.data);
return 0;
}
static int enet_protocol_handle_acknowledge(ENetHost* host, ENetEvent* event, ENetPeer* peer, const ENetProtocol* command) {
uint32_t roundTripTime, receivedSentTime, receivedReliableSequenceNumber;
ENetProtocolCommand commandNumber;
if (peer->state == ENET_PEER_STATE_DISCONNECTED || peer->state == ENET_PEER_STATE_ZOMBIE)
return 0;
receivedSentTime = ENET_NET_TO_HOST_16(command->acknowledge.receivedSentTime);
receivedSentTime |= host->serviceTime & 0xFFFF0000;
if ((receivedSentTime & 0x8000) > (host->serviceTime & 0x8000))
receivedSentTime -= 0x10000;
if (ENET_TIME_LESS(host->serviceTime, receivedSentTime))
return 0;
roundTripTime = ENET_TIME_DIFFERENCE(host->serviceTime, receivedSentTime);
if (roundTripTime == 0)
roundTripTime = 1;
enet_peer_throttle(peer, roundTripTime);
if (peer->lastReceiveTime > 0) {
if (roundTripTime >= peer->roundTripTime) {
uint32_t diff = roundTripTime - peer->roundTripTime;
peer->roundTripTimeVariance -= peer->roundTripTimeVariance / 4;
peer->roundTripTimeVariance += diff / 4;
peer->roundTripTime += diff / 8;
} else {
uint32_t diff = peer->roundTripTime - roundTripTime;
if (diff <= peer->roundTripTimeVariance) {
peer->roundTripTimeVariance -= peer->roundTripTimeVariance / 4;
peer->roundTripTimeVariance += diff / 4;
} else {
peer->roundTripTimeVariance -= peer->roundTripTimeVariance / 32;
peer->roundTripTimeVariance += diff / 32;
}
peer->roundTripTime -= diff / 8;
}
} else {
peer->roundTripTime = roundTripTime;
peer->roundTripTimeVariance = roundTripTime / 2;
}
if (peer->roundTripTime < peer->lowestRoundTripTime)
peer->lowestRoundTripTime = peer->roundTripTime;
if (peer->roundTripTimeVariance > peer->highestRoundTripTimeVariance)
peer->highestRoundTripTimeVariance = peer->roundTripTimeVariance;
if (peer->packetThrottleEpoch == 0 || ENET_TIME_DIFFERENCE(host->serviceTime, peer->packetThrottleEpoch) >= peer->packetThrottleInterval) {
peer->lastRoundTripTime = peer->lowestRoundTripTime;
peer->lastRoundTripTimeVariance = peer->highestRoundTripTimeVariance;
peer->lowestRoundTripTime = peer->roundTripTime;
peer->highestRoundTripTimeVariance = peer->roundTripTimeVariance;
peer->packetThrottleEpoch = host->serviceTime;
}
peer->lastReceiveTime = ENET_MAX(host->serviceTime, 1);
peer->earliestTimeout = 0;
receivedReliableSequenceNumber = ENET_NET_TO_HOST_16(command->acknowledge.receivedReliableSequenceNumber);
commandNumber = enet_protocol_remove_sent_reliable_command(peer, receivedReliableSequenceNumber, command->header.channelID);
switch (peer->state) {
case ENET_PEER_STATE_ACKNOWLEDGING_CONNECT:
if (commandNumber != ENET_PROTOCOL_COMMAND_VERIFY_CONNECT)
return -1;
enet_protocol_notify_connect(host, peer, event);
break;
case ENET_PEER_STATE_DISCONNECTING:
if (commandNumber != ENET_PROTOCOL_COMMAND_DISCONNECT)
return -1;
enet_protocol_notify_disconnect(host, peer, event);
break;
case ENET_PEER_STATE_DISCONNECT_LATER:
if (enet_list_empty(&peer->outgoingCommands) && enet_list_empty(&peer->sentReliableCommands))
enet_peer_disconnect(peer, peer->eventData);
break;
default:
break;
}
return 0;
}
static int enet_protocol_handle_verify_connect(ENetHost* host, ENetEvent* event, ENetPeer* peer, const ENetProtocol* command) {
uint32_t mtu, windowSize;
size_t channelCount;
if (peer->state != ENET_PEER_STATE_CONNECTING)
return 0;
channelCount = ENET_NET_TO_HOST_32(command->verifyConnect.channelCount);
if (channelCount < ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT || channelCount > ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT || ENET_NET_TO_HOST_32(command->verifyConnect.packetThrottleInterval) != peer->packetThrottleInterval || ENET_NET_TO_HOST_32(command->verifyConnect.packetThrottleAcceleration) != peer->packetThrottleAcceleration || ENET_NET_TO_HOST_32(command->verifyConnect.packetThrottleDeceleration) != peer->packetThrottleDeceleration || command->verifyConnect.connectID != peer->connectID) {
peer->eventData = 0;
enet_protocol_dispatch_state(host, peer, ENET_PEER_STATE_ZOMBIE);
return -1;
}
enet_protocol_remove_sent_reliable_command(peer, 1, 0xFF);
if (channelCount < peer->channelCount)
peer->channelCount = channelCount;
peer->outgoingPeerID = ENET_NET_TO_HOST_16(command->verifyConnect.outgoingPeerID);
peer->incomingSessionID = command->verifyConnect.incomingSessionID;
peer->outgoingSessionID = command->verifyConnect.outgoingSessionID;
mtu = ENET_NET_TO_HOST_32(command->verifyConnect.mtu);
if (mtu < ENET_PROTOCOL_MINIMUM_MTU)
mtu = ENET_PROTOCOL_MINIMUM_MTU;
else if (mtu > ENET_PROTOCOL_MAXIMUM_MTU)
mtu = ENET_PROTOCOL_MAXIMUM_MTU;
if (mtu < peer->mtu)
peer->mtu = mtu;
windowSize = ENET_NET_TO_HOST_32(command->verifyConnect.windowSize);
if (windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
if (windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
if (windowSize < peer->windowSize)
peer->windowSize = windowSize;
peer->incomingBandwidth = ENET_NET_TO_HOST_32(command->verifyConnect.incomingBandwidth);
peer->outgoingBandwidth = ENET_NET_TO_HOST_32(command->verifyConnect.outgoingBandwidth);
enet_protocol_notify_connect(host, peer, event);
return 0;
}
static int enet_protocol_handle_incoming_commands(ENetHost* host, ENetEvent* event) {
ENetProtocolHeader* header;
ENetProtocol* command;
ENetPeer* peer;
uint8_t* currentData;
size_t headerSize;
uint16_t peerID, flags;
uint8_t sessionID;
if (host->receivedDataLength < (size_t)&((ENetProtocolHeader*)0)->sentTime)
return 0;
header = (ENetProtocolHeader*)host->receivedData;
peerID = ENET_NET_TO_HOST_16(header->peerID);
sessionID = (peerID & ENET_PROTOCOL_HEADER_SESSION_MASK) >> ENET_PROTOCOL_HEADER_SESSION_SHIFT;
flags = peerID & ENET_PROTOCOL_HEADER_FLAG_MASK;
peerID &= ~(ENET_PROTOCOL_HEADER_FLAG_MASK | ENET_PROTOCOL_HEADER_SESSION_MASK);
headerSize = (flags & ENET_PROTOCOL_HEADER_FLAG_SENT_TIME ? sizeof(ENetProtocolHeader) : (size_t)&((ENetProtocolHeader*)0)->sentTime);
if (host->checksumCallback != NULL)
headerSize += sizeof(enet_checksum);
if (peerID == ENET_PROTOCOL_MAXIMUM_PEER_ID) {
peer = NULL;
} else if (peerID >= host->peerCount) {
return 0;
} else {
peer = &host->peers[peerID];
if (peer->state == ENET_PEER_STATE_DISCONNECTED || peer->state == ENET_PEER_STATE_ZOMBIE || ((!enet_in6_equal(host->receivedAddress.ipv6, peer->address.ipv6) || host->receivedAddress.port != peer->address.port) && peer->address.ipv4.ip.s_addr != INADDR_BROADCAST) || (peer->outgoingPeerID < ENET_PROTOCOL_MAXIMUM_PEER_ID && sessionID != peer->incomingSessionID))
return 0;
}
if (host->checksumCallback != NULL) {
enet_checksum* checksum = (enet_checksum*)&host->receivedData[headerSize - sizeof(enet_checksum)];
enet_checksum desiredChecksum = *checksum;
ENetBuffer buffer;
*checksum = peer != NULL ? peer->connectID : 0;
buffer.data = host->receivedData;
buffer.dataLength = host->receivedDataLength;
if (host->checksumCallback(&buffer, 1) != desiredChecksum)
return 0;
}
if (peer != NULL) {
peer->address.ipv6 = host->receivedAddress.ipv6;
peer->address.port = host->receivedAddress.port;
peer->incomingDataTotal += host->receivedDataLength;
peer->totalDataReceived += host->receivedDataLength;
}
currentData = host->receivedData + headerSize;
while (currentData < &host->receivedData[host->receivedDataLength]) {
uint8_t commandNumber;
size_t commandSize;
command = (ENetProtocol*)currentData;
if (currentData + sizeof(ENetProtocolCommandHeader) > &host->receivedData[host->receivedDataLength])
break;
commandNumber = command->header.command & ENET_PROTOCOL_COMMAND_MASK;
if (commandNumber >= ENET_PROTOCOL_COMMAND_COUNT)
break;
commandSize = commandSizes[commandNumber];
if (commandSize == 0 || currentData + commandSize > &host->receivedData[host->receivedDataLength])
break;
currentData += commandSize;
if (peer == NULL && (commandNumber != ENET_PROTOCOL_COMMAND_CONNECT || currentData < &host->receivedData[host->receivedDataLength]))
break;
command->header.reliableSequenceNumber = ENET_NET_TO_HOST_16(command->header.reliableSequenceNumber);
switch (commandNumber) {
case ENET_PROTOCOL_COMMAND_ACKNOWLEDGE:
if (enet_protocol_handle_acknowledge(host, event, peer, command))
goto commandError;
break;
case ENET_PROTOCOL_COMMAND_CONNECT:
if (peer != NULL)
goto commandError;
if (host->preventConnections == 0) {
peer = enet_protocol_handle_connect(host, header, command);
if (peer == NULL)
goto commandError;
}
break;
case ENET_PROTOCOL_COMMAND_VERIFY_CONNECT:
if (enet_protocol_handle_verify_connect(host, event, peer, command))
goto commandError;
break;
case ENET_PROTOCOL_COMMAND_DISCONNECT:
if (enet_protocol_handle_disconnect(host, peer, command))
goto commandError;
break;
case ENET_PROTOCOL_COMMAND_PING:
if (enet_protocol_handle_ping(host, peer, command))
goto commandError;
break;
case ENET_PROTOCOL_COMMAND_SEND_RELIABLE:
if (enet_protocol_handle_send_reliable(host, peer, command, &currentData))
goto commandError;
break;
case ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE:
if (enet_protocol_handle_send_unreliable(host, peer, command, &currentData))
goto commandError;
break;
case ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED:
if (enet_protocol_handle_send_unsequenced(host, peer, command, &currentData))
goto commandError;
break;
case ENET_PROTOCOL_COMMAND_SEND_FRAGMENT:
if (enet_protocol_handle_send_fragment(host, peer, command, &currentData))
goto commandError;
break;
case ENET_PROTOCOL_COMMAND_BANDWIDTH_LIMIT:
if (enet_protocol_handle_bandwidth_limit(host, peer, command))
goto commandError;
break;
case ENET_PROTOCOL_COMMAND_THROTTLE_CONFIGURE:
if (enet_protocol_handle_throttle_configure(host, peer, command))
goto commandError;
break;
case ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE_FRAGMENT:
if (enet_protocol_handle_send_unreliable_fragment(host, peer, command, &currentData))
goto commandError;
break;
default:
goto commandError;
}
if (peer != NULL && (command->header.command & ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE) != 0) {
uint16_t sentTime;
if (!(flags & ENET_PROTOCOL_HEADER_FLAG_SENT_TIME))
break;
sentTime = ENET_NET_TO_HOST_16(header->sentTime);
switch (peer->state) {
case ENET_PEER_STATE_DISCONNECTING:
case ENET_PEER_STATE_ACKNOWLEDGING_CONNECT:
case ENET_PEER_STATE_DISCONNECTED:
case ENET_PEER_STATE_ZOMBIE:
break;
case ENET_PEER_STATE_ACKNOWLEDGING_DISCONNECT:
if ((command->header.command & ENET_PROTOCOL_COMMAND_MASK) == ENET_PROTOCOL_COMMAND_DISCONNECT)
enet_peer_queue_acknowledgement(peer, command, sentTime);
break;
default:
enet_peer_queue_acknowledgement(peer, command, sentTime);
break;
}
}
}
commandError:
if (event != NULL && event->type != ENET_EVENT_TYPE_NONE)
return 1;
return 0;
}
static int enet_protocol_receive_incoming_commands(ENetHost* host, ENetEvent* event) {
int packets;
for (packets = 0; packets < 256; ++packets) {
int receivedLength;
ENetBuffer buffer;
buffer.data = host->packetData[0];
buffer.dataLength = host->mtu;
receivedLength = enet_socket_receive(host->socket, &host->receivedAddress, &buffer, 1);
if (receivedLength == -2)
continue;
if (receivedLength < 0)
return -1;
if (receivedLength == 0)
return 0;
host->receivedData = host->packetData[0];
host->receivedDataLength = receivedLength;
host->totalReceivedData += receivedLength;
host->totalReceivedPackets++;
if (host->interceptCallback != NULL) {
switch (host->interceptCallback(event, &host->receivedAddress, host->receivedData, host->receivedDataLength)) {
case 1:
if (event != NULL && event->type != ENET_EVENT_TYPE_NONE)
return 1;
continue;
case -1:
return -1;
default:
break;
}
}
switch (enet_protocol_handle_incoming_commands(host, event)) {
case 1:
return 1;
case -1:
return -1;
default:
break;
}
}
return 0;
}
static void enet_protocol_send_acknowledgements(ENetHost* host, ENetPeer* peer) {
ENetProtocol* command = &host->commands[host->commandCount];
ENetBuffer* buffer = &host->buffers[host->bufferCount];
ENetAcknowledgement* acknowledgement;
ENetListIterator currentAcknowledgement;
uint16_t reliableSequenceNumber;
currentAcknowledgement = enet_list_begin(&peer->acknowledgements);
while (currentAcknowledgement != enet_list_end(&peer->acknowledgements)) {
if (command >= &host->commands[sizeof(host->commands) / sizeof(ENetProtocol)] || buffer >= &host->buffers[sizeof(host->buffers) / sizeof(ENetBuffer)] || peer->mtu - host->packetSize < sizeof(ENetProtocolAcknowledge)) {
host->continueSending = 1;
break;
}
acknowledgement = (ENetAcknowledgement*)currentAcknowledgement;
currentAcknowledgement = enet_list_next(currentAcknowledgement);
buffer->data = command;
buffer->dataLength = sizeof(ENetProtocolAcknowledge);
host->packetSize += buffer->dataLength;
reliableSequenceNumber = ENET_HOST_TO_NET_16(acknowledgement->command.header.reliableSequenceNumber);
command->header.command = ENET_PROTOCOL_COMMAND_ACKNOWLEDGE;
command->header.channelID = acknowledgement->command.header.channelID;
command->header.reliableSequenceNumber = reliableSequenceNumber;
command->acknowledge.receivedReliableSequenceNumber = reliableSequenceNumber;
command->acknowledge.receivedSentTime = ENET_HOST_TO_NET_16(acknowledgement->sentTime);
if ((acknowledgement->command.header.command & ENET_PROTOCOL_COMMAND_MASK) == ENET_PROTOCOL_COMMAND_DISCONNECT)
enet_protocol_dispatch_state(host, peer, ENET_PEER_STATE_ZOMBIE);
enet_list_remove(&acknowledgement->acknowledgementList);
enet_free(acknowledgement);
++command;
++buffer;
}
host->commandCount = command - host->commands;
host->bufferCount = buffer - host->buffers;
}
static int enet_protocol_check_timeouts(ENetHost* host, ENetPeer* peer, ENetEvent* event) {
ENetOutgoingCommand* outgoingCommand;
ENetListIterator currentCommand, insertPosition;
currentCommand = enet_list_begin(&peer->sentReliableCommands);
insertPosition = enet_list_begin(&peer->outgoingCommands);
while (currentCommand != enet_list_end(&peer->sentReliableCommands)) {
outgoingCommand = (ENetOutgoingCommand*)currentCommand;
currentCommand = enet_list_next(currentCommand);
if (ENET_TIME_DIFFERENCE(host->serviceTime, outgoingCommand->sentTime) < outgoingCommand->roundTripTimeout)
continue;
if (peer->earliestTimeout == 0 || ENET_TIME_LESS(outgoingCommand->sentTime, peer->earliestTimeout))
peer->earliestTimeout = outgoingCommand->sentTime;
if (peer->earliestTimeout != 0 && (ENET_TIME_DIFFERENCE(host->serviceTime, peer->earliestTimeout) >= peer->timeoutMaximum || (outgoingCommand->roundTripTimeout >= outgoingCommand->roundTripTimeoutLimit && ENET_TIME_DIFFERENCE(host->serviceTime, peer->earliestTimeout) >= peer->timeoutMinimum))) {
enet_protocol_notify_disconnect_timeout(host, peer, event);
return 1;
}
if (outgoingCommand->packet != NULL)
peer->reliableDataInTransit -= outgoingCommand->fragmentLength;
++peer->totalPacketsLost;
outgoingCommand->roundTripTimeout = peer->roundTripTime + 4 * peer->roundTripTimeVariance;
outgoingCommand->roundTripTimeoutLimit = peer->timeoutLimit * outgoingCommand->roundTripTimeout;
enet_list_insert(insertPosition, enet_list_remove(&outgoingCommand->outgoingCommandList));
if (currentCommand == enet_list_begin(&peer->sentReliableCommands) && !enet_list_empty(&peer->sentReliableCommands)) {
outgoingCommand = (ENetOutgoingCommand*)currentCommand;
peer->nextTimeout = outgoingCommand->sentTime + outgoingCommand->roundTripTimeout;
}
}
return 0;
}
static int enet_protocol_check_outgoing_commands(ENetHost* host, ENetPeer* peer) {
ENetProtocol* command = &host->commands[host->commandCount];
ENetBuffer* buffer = &host->buffers[host->bufferCount];
ENetOutgoingCommand* outgoingCommand;
ENetListIterator currentCommand;
ENetChannel* channel = NULL;
uint16_t reliableWindow = 0;
size_t commandSize = 0;
int windowExceeded = 0, windowWrap = 0, canPing = 1;
currentCommand = enet_list_begin(&peer->outgoingCommands);
while (currentCommand != enet_list_end(&peer->outgoingCommands)) {
outgoingCommand = (ENetOutgoingCommand*)currentCommand;
if (outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE) {
channel = outgoingCommand->command.header.channelID < peer->channelCount ? &peer->channels[outgoingCommand->command.header.channelID] : NULL;
reliableWindow = outgoingCommand->reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
if (channel != NULL) {
if (!windowWrap && outgoingCommand->sendAttempts < 1 && !(outgoingCommand->reliableSequenceNumber % ENET_PEER_RELIABLE_WINDOW_SIZE) && (channel->reliableWindows[(reliableWindow + ENET_PEER_RELIABLE_WINDOWS - 1) % ENET_PEER_RELIABLE_WINDOWS] >= ENET_PEER_RELIABLE_WINDOW_SIZE || channel->usedReliableWindows & ((((1 << (ENET_PEER_FREE_RELIABLE_WINDOWS + 2)) - 1) << reliableWindow) | (((1 << (ENET_PEER_FREE_RELIABLE_WINDOWS + 2)) - 1) >> (ENET_PEER_RELIABLE_WINDOWS - reliableWindow)))))
windowWrap = 1;
if (windowWrap) {
currentCommand = enet_list_next(currentCommand);
continue;
}
}
if (outgoingCommand->packet != NULL) {
if (!windowExceeded) {
uint32_t windowSize = (peer->packetThrottle * peer->windowSize) / ENET_PEER_PACKET_THROTTLE_SCALE;
if (peer->reliableDataInTransit + outgoingCommand->fragmentLength > ENET_MAX(windowSize, peer->mtu))
windowExceeded = 1;
}
if (windowExceeded) {
currentCommand = enet_list_next(currentCommand);
continue;
}
}
canPing = 0;
}
commandSize = commandSizes[outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK];
if (command >= &host->commands[sizeof(host->commands) / sizeof(ENetProtocol)] || buffer + 1 >= &host->buffers[sizeof(host->buffers) / sizeof(ENetBuffer)] || peer->mtu - host->packetSize < commandSize || (outgoingCommand->packet != NULL && (uint16_t)(peer->mtu - host->packetSize) < (uint16_t)(commandSize + outgoingCommand->fragmentLength))) {
host->continueSending = 1;
break;
}
currentCommand = enet_list_next(currentCommand);
if (outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE) {
if (channel != NULL && outgoingCommand->sendAttempts < 1) {
channel->usedReliableWindows |= 1 << reliableWindow;
++channel->reliableWindows[reliableWindow];
}
++outgoingCommand->sendAttempts;
if (outgoingCommand->roundTripTimeout == 0) {
outgoingCommand->roundTripTimeout = peer->roundTripTime + 4 * peer->roundTripTimeVariance;
outgoingCommand->roundTripTimeoutLimit = peer->timeoutLimit * outgoingCommand->roundTripTimeout;
}
if (enet_list_empty(&peer->sentReliableCommands))
peer->nextTimeout = host->serviceTime + outgoingCommand->roundTripTimeout;
enet_list_insert(enet_list_end(&peer->sentReliableCommands),
enet_list_remove(&outgoingCommand->outgoingCommandList));
outgoingCommand->sentTime = host->serviceTime;
host->headerFlags |= ENET_PROTOCOL_HEADER_FLAG_SENT_TIME;
peer->reliableDataInTransit += outgoingCommand->fragmentLength;
} else {
if (outgoingCommand->packet != NULL && outgoingCommand->fragmentOffset == 0 && !(outgoingCommand->packet->flags & (ENET_PACKET_FLAG_UNTHROTTLED))) {
peer->packetThrottleCounter += ENET_PEER_PACKET_THROTTLE_COUNTER;
peer->packetThrottleCounter %= ENET_PEER_PACKET_THROTTLE_SCALE;
if (peer->packetThrottleCounter > peer->packetThrottle) {
uint16_t reliableSequenceNumber = outgoingCommand->reliableSequenceNumber,
unreliableSequenceNumber = outgoingCommand->unreliableSequenceNumber;
for (;;) {
--outgoingCommand->packet->referenceCount;
if (outgoingCommand->packet->referenceCount == 0)
enet_packet_destroy(outgoingCommand->packet);
enet_list_remove(&outgoingCommand->outgoingCommandList);
enet_free(outgoingCommand);
if (currentCommand == enet_list_end(&peer->outgoingCommands))
break;
outgoingCommand = (ENetOutgoingCommand*)currentCommand;
if (outgoingCommand->reliableSequenceNumber != reliableSequenceNumber || outgoingCommand->unreliableSequenceNumber != unreliableSequenceNumber)
break;
currentCommand = enet_list_next(currentCommand);
}
continue;
}
}
enet_list_remove(&outgoingCommand->outgoingCommandList);
if (outgoingCommand->packet != NULL)
enet_list_insert(enet_list_end(&peer->sentUnreliableCommands), outgoingCommand);
}
buffer->data = command;
buffer->dataLength = commandSize;
host->packetSize += buffer->dataLength;
*command = outgoingCommand->command;
if (outgoingCommand->packet != NULL) {
++buffer;
buffer->data = outgoingCommand->packet->data + outgoingCommand->fragmentOffset;
buffer->dataLength = outgoingCommand->fragmentLength;
host->packetSize += outgoingCommand->fragmentLength;
} else if (!(outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE)) {
enet_free(outgoingCommand);
}
++peer->totalPacketsSent;
++command;
++buffer;
}
host->commandCount = command - host->commands;
host->bufferCount = buffer - host->buffers;
if (peer->state == ENET_PEER_STATE_DISCONNECT_LATER && enet_list_empty(&peer->outgoingCommands) && enet_list_empty(&peer->sentReliableCommands) && enet_list_empty(&peer->sentUnreliableCommands))
enet_peer_disconnect(peer, peer->eventData);
return canPing;
}
static int enet_protocol_send_outgoing_commands(ENetHost* host, ENetEvent* event, int checkForTimeouts) {
uint8_t headerData[sizeof(ENetProtocolHeader) + sizeof(enet_checksum)];
ENetProtocolHeader* header = (ENetProtocolHeader*)headerData;
ENetPeer* currentPeer;
int sentLength;
host->continueSending = 1;
while (host->continueSending) {
for (host->continueSending = 0, currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
if (currentPeer->state == ENET_PEER_STATE_DISCONNECTED || currentPeer->state == ENET_PEER_STATE_ZOMBIE)
continue;
host->headerFlags = 0;
host->commandCount = 0;
host->bufferCount = 1;
host->packetSize = sizeof(ENetProtocolHeader);
if (host->checksumCallback != NULL)
host->packetSize += sizeof(enet_checksum);
if (!enet_list_empty(&currentPeer->acknowledgements))
enet_protocol_send_acknowledgements(host, currentPeer);
if (checkForTimeouts != 0 && !enet_list_empty(&currentPeer->sentReliableCommands) && ENET_TIME_GREATER_EQUAL(host->serviceTime, currentPeer->nextTimeout) && enet_protocol_check_timeouts(host, currentPeer, event) == 1) {
if (event != NULL && event->type != ENET_EVENT_TYPE_NONE)
return 1;
else
continue;
}
if ((enet_list_empty(&currentPeer->outgoingCommands) || enet_protocol_check_outgoing_commands(host, currentPeer)) && enet_list_empty(&currentPeer->sentReliableCommands) && ENET_TIME_DIFFERENCE(host->serviceTime, currentPeer->lastReceiveTime) >= currentPeer->pingInterval && currentPeer->mtu - host->packetSize >= sizeof(ENetProtocolPing)) {
enet_peer_ping(currentPeer);
enet_protocol_check_outgoing_commands(host, currentPeer);
}
if (host->commandCount == 0)
continue;
host->buffers->data = headerData;
if (host->headerFlags & ENET_PROTOCOL_HEADER_FLAG_SENT_TIME) {
header->sentTime = ENET_HOST_TO_NET_16(host->serviceTime & 0xFFFF);
host->buffers->dataLength = sizeof(ENetProtocolHeader);
} else {
host->buffers->dataLength = (size_t)&((ENetProtocolHeader*)0)->sentTime;
}
if (currentPeer->outgoingPeerID < ENET_PROTOCOL_MAXIMUM_PEER_ID)
host->headerFlags |= currentPeer->outgoingSessionID << ENET_PROTOCOL_HEADER_SESSION_SHIFT;
header->peerID = ENET_HOST_TO_NET_16(currentPeer->outgoingPeerID | host->headerFlags);
if (host->checksumCallback != NULL) {
enet_checksum* checksum = (enet_checksum*)&headerData[host->buffers->dataLength];
*checksum = currentPeer->outgoingPeerID < ENET_PROTOCOL_MAXIMUM_PEER_ID ? currentPeer->connectID : 0;
host->buffers->dataLength += sizeof(enet_checksum);
*checksum = host->checksumCallback(host->buffers, host->bufferCount);
}
currentPeer->lastSendTime = host->serviceTime;
sentLength = enet_socket_send(host->socket, &currentPeer->address, host->buffers, host->bufferCount);
enet_protocol_remove_sent_unreliable_commands(currentPeer);
if (sentLength < 0)
return -1;
host->totalSentData += sentLength;
currentPeer->totalDataSent += sentLength;
host->totalSentPackets++;
}
}
return 0;
}
void enet_host_flush(ENetHost* host) {
host->serviceTime = enet_time_get();
enet_protocol_send_outgoing_commands(host, NULL, 0);
}
int enet_host_check_events(ENetHost* host, ENetEvent* event) {
if (event == NULL)
return -1;
event->type = ENET_EVENT_TYPE_NONE;
event->peer = NULL;
event->packet = NULL;
return enet_protocol_dispatch_incoming_commands(host, event);
}
int enet_host_service(ENetHost* host, ENetEvent* event, uint32_t timeout) {
uint32_t waitCondition;
if (event != NULL) {
event->type = ENET_EVENT_TYPE_NONE;
event->peer = NULL;
event->packet = NULL;
switch (enet_protocol_dispatch_incoming_commands(host, event)) {
case 1:
return 1;
case -1:
#ifdef ENET_DEBUG
perror("Error dispatching incoming packets");
#endif
return -1;
default:
break;
}
}
host->serviceTime = enet_time_get();
timeout += host->serviceTime;
do {
if (ENET_TIME_DIFFERENCE(host->serviceTime, host->bandwidthThrottleEpoch) >= ENET_HOST_BANDWIDTH_THROTTLE_INTERVAL)
enet_host_bandwidth_throttle(host);
switch (enet_protocol_send_outgoing_commands(host, event, 1)) {
case 1:
return 1;
case -1:
#ifdef ENET_DEBUG
perror("Error sending outgoing packets");
#endif
return -1;
default:
break;
}
switch (enet_protocol_receive_incoming_commands(host, event)) {
case 1:
return 1;
case -1:
#ifdef ENET_DEBUG
perror("Error receiving incoming packets");
#endif
return -1;
default:
break;
}
switch (enet_protocol_send_outgoing_commands(host, event, 1)) {
case 1:
return 1;
case -1:
#ifdef ENET_DEBUG
perror("Error sending outgoing packets");
#endif
return -1;
default:
break;
}
if (event != NULL) {
switch (enet_protocol_dispatch_incoming_commands(host, event)) {
case 1:
return 1;
case -1:
#ifdef ENET_DEBUG
perror("Error dispatching incoming packets");
#endif
return -1;
default:
break;
}
}
if (ENET_TIME_GREATER_EQUAL(host->serviceTime, timeout))
return 0;
do {
host->serviceTime = enet_time_get();
if (ENET_TIME_GREATER_EQUAL(host->serviceTime, timeout))
return 0;
waitCondition = ENET_SOCKET_WAIT_RECEIVE | ENET_SOCKET_WAIT_INTERRUPT;
if (enet_socket_wait(host->socket, &waitCondition, ENET_TIME_DIFFERENCE(timeout, host->serviceTime)) != 0)
return -1;
}
while (waitCondition & ENET_SOCKET_WAIT_INTERRUPT);
host->serviceTime = enet_time_get();
}
while (waitCondition & ENET_SOCKET_WAIT_RECEIVE);
return 0;
}
/*
=======================================================================
Peer
=======================================================================
*/
void enet_peer_throttle_configure(ENetPeer* peer, uint32_t interval, uint32_t acceleration, uint32_t deceleration, uint32_t threshold) {
ENetProtocol command;
peer->packetThrottleThreshold = threshold;
peer->packetThrottleInterval = interval;
peer->packetThrottleAcceleration = acceleration;
peer->packetThrottleDeceleration = deceleration;
command.header.command = ENET_PROTOCOL_COMMAND_THROTTLE_CONFIGURE | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
command.header.channelID = 0xFF;
command.throttleConfigure.packetThrottleInterval = ENET_HOST_TO_NET_32(interval);
command.throttleConfigure.packetThrottleAcceleration = ENET_HOST_TO_NET_32(acceleration);
command.throttleConfigure.packetThrottleDeceleration = ENET_HOST_TO_NET_32(deceleration);
enet_peer_queue_outgoing_command(peer, &command, NULL, 0, 0);
}
int enet_peer_throttle(ENetPeer* peer, uint32_t rtt) {
if (peer->lastRoundTripTime <= peer->lastRoundTripTimeVariance) {
peer->packetThrottle = peer->packetThrottleLimit;
} else if (rtt < peer->lastRoundTripTime + (peer->lastRoundTripTimeVariance + 1) / 2) {
peer->packetThrottle += peer->packetThrottleAcceleration;
if (peer->packetThrottle > peer->packetThrottleLimit)
peer->packetThrottle = peer->packetThrottleLimit;
return 1;
} else if (rtt > peer->lastRoundTripTime + peer->packetThrottleThreshold + 2 * peer->lastRoundTripTimeVariance) {
if (peer->packetThrottle > peer->packetThrottleDeceleration)
peer->packetThrottle -= peer->packetThrottleDeceleration;
else
peer->packetThrottle = 0;
return -1;
}
return 0;
}
int enet_peer_send(ENetPeer* peer, uint8_t channelID, ENetPacket* packet) {
ENetChannel* channel;
ENetProtocol command;
size_t fragmentLength;
if (peer->state != ENET_PEER_STATE_CONNECTED || channelID >= peer->channelCount || packet->dataLength > peer->host->maximumPacketSize)
return -1;
channel = &peer->channels[channelID];
fragmentLength = peer->mtu - sizeof(ENetProtocolHeader) - sizeof(ENetProtocolSendFragment) - sizeof(ENetProtocolAcknowledge);
if (peer->host->checksumCallback != NULL)
fragmentLength -= sizeof(enet_checksum);
if (packet->dataLength > fragmentLength) {
uint32_t fragmentCount = (packet->dataLength + fragmentLength - 1) / fragmentLength, fragmentNumber, fragmentOffset;
uint8_t commandNumber;
uint16_t startSequenceNumber;
ENetList fragments;
ENetOutgoingCommand* fragment;
if (fragmentCount > ENET_PROTOCOL_MAXIMUM_FRAGMENT_COUNT)
return -1;
if ((packet->flags & (ENET_PACKET_FLAG_RELIABLE | ENET_PACKET_FLAG_UNRELIABLE_FRAGMENTED)) == ENET_PACKET_FLAG_UNRELIABLE_FRAGMENTED && channel->outgoingUnreliableSequenceNumber < 0xFFFF) {
commandNumber = ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE_FRAGMENT;
startSequenceNumber = ENET_HOST_TO_NET_16(channel->outgoingUnreliableSequenceNumber + 1);
} else {
commandNumber = ENET_PROTOCOL_COMMAND_SEND_FRAGMENT | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
startSequenceNumber = ENET_HOST_TO_NET_16(channel->outgoingReliableSequenceNumber + 1);
}
enet_list_clear(&fragments);
for (fragmentNumber = 0, fragmentOffset = 0; fragmentOffset < packet->dataLength; ++fragmentNumber, fragmentOffset += fragmentLength) {
if (packet->dataLength - fragmentOffset < fragmentLength)
fragmentLength = packet->dataLength - fragmentOffset;
fragment = (ENetOutgoingCommand*)enet_malloc(sizeof(ENetOutgoingCommand));
if (fragment == NULL) {
while (!enet_list_empty(&fragments)) {
fragment = (ENetOutgoingCommand*)enet_list_remove(enet_list_begin(&fragments));
enet_free(fragment);
}
return -1;
}
fragment->fragmentOffset = fragmentOffset;
fragment->fragmentLength = fragmentLength;
fragment->packet = packet;
fragment->command.header.command = commandNumber;
fragment->command.header.channelID = channelID;
fragment->command.sendFragment.startSequenceNumber = startSequenceNumber;
fragment->command.sendFragment.dataLength = ENET_HOST_TO_NET_16(fragmentLength);
fragment->command.sendFragment.fragmentCount = ENET_HOST_TO_NET_32(fragmentCount);
fragment->command.sendFragment.fragmentNumber = ENET_HOST_TO_NET_32(fragmentNumber);
fragment->command.sendFragment.totalLength = ENET_HOST_TO_NET_32(packet->dataLength);
fragment->command.sendFragment.fragmentOffset = ENET_NET_TO_HOST_32(fragmentOffset);
enet_list_insert(enet_list_end(&fragments), fragment);
}
packet->referenceCount += fragmentNumber;
while (!enet_list_empty(&fragments)) {
fragment = (ENetOutgoingCommand*)enet_list_remove(enet_list_begin(&fragments));
enet_peer_setup_outgoing_command(peer, fragment);
}
return 0;
}
command.header.channelID = channelID;
if ((packet->flags & (ENET_PACKET_FLAG_RELIABLE | ENET_PACKET_FLAG_UNSEQUENCED)) == ENET_PACKET_FLAG_UNSEQUENCED) {
command.header.command = ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED | ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED;
command.sendUnsequenced.dataLength = ENET_HOST_TO_NET_16(packet->dataLength);
} else if (packet->flags & ENET_PACKET_FLAG_RELIABLE || channel->outgoingUnreliableSequenceNumber >= 0xFFFF) {
command.header.command = ENET_PROTOCOL_COMMAND_SEND_RELIABLE | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
command.sendReliable.dataLength = ENET_HOST_TO_NET_16(packet->dataLength);
} else {
command.header.command = ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE;
command.sendUnreliable.dataLength = ENET_HOST_TO_NET_16(packet->dataLength);
}
if (enet_peer_queue_outgoing_command(peer, &command, packet, 0, packet->dataLength) == NULL)
return -1;
if (packet->flags & ENET_PACKET_FLAG_INSTANT)
enet_host_flush(peer->host);
return 0;
}
ENetPacket* enet_peer_receive(ENetPeer* peer, uint8_t* channelID) {
ENetIncomingCommand* incomingCommand;
ENetPacket* packet;
if (enet_list_empty(&peer->dispatchedCommands))
return NULL;
incomingCommand = (ENetIncomingCommand*)enet_list_remove(enet_list_begin(&peer->dispatchedCommands));
if (channelID != NULL)
*channelID = incomingCommand->command.header.channelID;
packet = incomingCommand->packet;
--packet->referenceCount;
if (incomingCommand->fragments != NULL)
enet_free(incomingCommand->fragments);
enet_free(incomingCommand);
peer->totalWaitingData -= packet->dataLength;
return packet;
}
static void enet_peer_reset_outgoing_commands(ENetList* queue) {
ENetOutgoingCommand* outgoingCommand;
while (!enet_list_empty(queue)) {
outgoingCommand = (ENetOutgoingCommand*)enet_list_remove(enet_list_begin(queue));
if (outgoingCommand->packet != NULL) {
--outgoingCommand->packet->referenceCount;
if (outgoingCommand->packet->referenceCount == 0)
enet_packet_destroy(outgoingCommand->packet);
}
enet_free(outgoingCommand);
}
}
static void enet_peer_remove_incoming_commands(ENetList* queue, ENetListIterator startCommand, ENetListIterator endCommand, ENetIncomingCommand* excludeCommand) {
ENetListIterator currentCommand;
for (currentCommand = startCommand; currentCommand != endCommand;) {
ENetIncomingCommand* incomingCommand = (ENetIncomingCommand*)currentCommand;
currentCommand = enet_list_next(currentCommand);
if (incomingCommand == excludeCommand)
continue;
enet_list_remove(&incomingCommand->incomingCommandList);
if (incomingCommand->packet != NULL) {
--incomingCommand->packet->referenceCount;
if (incomingCommand->packet->referenceCount == 0)
enet_packet_destroy(incomingCommand->packet);
}
if (incomingCommand->fragments != NULL)
enet_free(incomingCommand->fragments);
enet_free(incomingCommand);
}
}
static void enet_peer_reset_incoming_commands(ENetList* queue) {
enet_peer_remove_incoming_commands(queue, enet_list_begin(queue), enet_list_end(queue), NULL);
}
void enet_peer_reset_queues(ENetPeer* peer) {
ENetChannel* channel;
if (peer->needsDispatch) {
enet_list_remove(&peer->dispatchList);
peer->needsDispatch = 0;
}
while (!enet_list_empty(&peer->acknowledgements)) {
enet_free(enet_list_remove(enet_list_begin(&peer->acknowledgements)));
}
enet_peer_reset_outgoing_commands(&peer->sentReliableCommands);
enet_peer_reset_outgoing_commands(&peer->sentUnreliableCommands);
enet_peer_reset_outgoing_commands(&peer->outgoingCommands);
enet_peer_reset_incoming_commands(&peer->dispatchedCommands);
if (peer->channels != NULL && peer->channelCount > 0) {
for (channel = peer->channels; channel < &peer->channels[peer->channelCount]; ++channel) {
enet_peer_reset_incoming_commands(&channel->incomingReliableCommands);
enet_peer_reset_incoming_commands(&channel->incomingUnreliableCommands);
}
enet_free(peer->channels);
}
peer->channels = NULL;
peer->channelCount = 0;
}
void enet_peer_on_connect(ENetPeer* peer) {
if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) {
if (peer->incomingBandwidth != 0)
++peer->host->bandwidthLimitedPeers;
++peer->host->connectedPeers;
}
}
void enet_peer_on_disconnect(ENetPeer* peer) {
if (peer->state == ENET_PEER_STATE_CONNECTED || peer->state == ENET_PEER_STATE_DISCONNECT_LATER) {
if (peer->incomingBandwidth != 0)
--peer->host->bandwidthLimitedPeers;
--peer->host->connectedPeers;
}
}
void enet_peer_reset(ENetPeer* peer) {
enet_peer_on_disconnect(peer);
peer->outgoingPeerID = ENET_PROTOCOL_MAXIMUM_PEER_ID;
peer->state = ENET_PEER_STATE_DISCONNECTED;
peer->incomingBandwidth = 0;
peer->outgoingBandwidth = 0;
peer->incomingBandwidthThrottleEpoch = 0;
peer->outgoingBandwidthThrottleEpoch = 0;
peer->incomingDataTotal = 0;
peer->totalDataReceived = 0;
peer->outgoingDataTotal = 0;
peer->totalDataSent = 0;
peer->lastSendTime = 0;
peer->lastReceiveTime = 0;
peer->nextTimeout = 0;
peer->earliestTimeout = 0;
peer->totalPacketsSent = 0;
peer->totalPacketsLost = 0;
peer->packetThrottle = ENET_PEER_DEFAULT_PACKET_THROTTLE;
peer->packetThrottleThreshold = ENET_PEER_PACKET_THROTTLE_THRESHOLD;
peer->packetThrottleLimit = ENET_PEER_PACKET_THROTTLE_SCALE;
peer->packetThrottleCounter = 0;
peer->packetThrottleEpoch = 0;
peer->packetThrottleAcceleration = ENET_PEER_PACKET_THROTTLE_ACCELERATION;
peer->packetThrottleDeceleration = ENET_PEER_PACKET_THROTTLE_DECELERATION;
peer->packetThrottleInterval = ENET_PEER_PACKET_THROTTLE_INTERVAL;
peer->pingInterval = ENET_PEER_PING_INTERVAL;
peer->timeoutLimit = ENET_PEER_TIMEOUT_LIMIT;
peer->timeoutMinimum = ENET_PEER_TIMEOUT_MINIMUM;
peer->timeoutMaximum = ENET_PEER_TIMEOUT_MAXIMUM;
peer->lastRoundTripTime = ENET_PEER_DEFAULT_ROUND_TRIP_TIME;
peer->lowestRoundTripTime = ENET_PEER_DEFAULT_ROUND_TRIP_TIME;
peer->lastRoundTripTimeVariance = 0;
peer->highestRoundTripTimeVariance = 0;
peer->roundTripTime = 1;
peer->roundTripTimeVariance = 0;
peer->mtu = peer->host->mtu;
peer->reliableDataInTransit = 0;
peer->outgoingReliableSequenceNumber = 0;
peer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
peer->incomingUnsequencedGroup = 0;
peer->outgoingUnsequencedGroup = 0;
peer->eventData = 0;
peer->totalWaitingData = 0;
memset(peer->unsequencedWindow, 0, sizeof(peer->unsequencedWindow));
enet_peer_reset_queues(peer);
}
void enet_peer_ping(ENetPeer* peer) {
ENetProtocol command;
if (peer->state != ENET_PEER_STATE_CONNECTED)
return;
command.header.command = ENET_PROTOCOL_COMMAND_PING | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
command.header.channelID = 0xFF;
enet_peer_queue_outgoing_command(peer, &command, NULL, 0, 0);
}
void enet_peer_ping_interval(ENetPeer* peer, uint32_t pingInterval) {
peer->pingInterval = pingInterval ? pingInterval : ENET_PEER_PING_INTERVAL;
}
void enet_peer_timeout(ENetPeer* peer, uint32_t timeoutLimit, uint32_t timeoutMinimum, uint32_t timeoutMaximum) {
peer->timeoutLimit = timeoutLimit ? timeoutLimit : ENET_PEER_TIMEOUT_LIMIT;
peer->timeoutMinimum = timeoutMinimum ? timeoutMinimum : ENET_PEER_TIMEOUT_MINIMUM;
peer->timeoutMaximum = timeoutMaximum ? timeoutMaximum : ENET_PEER_TIMEOUT_MAXIMUM;
}
void enet_peer_disconnect_now(ENetPeer* peer, uint32_t data) {
ENetProtocol command;
if (peer->state == ENET_PEER_STATE_DISCONNECTED)
return;
if (peer->state != ENET_PEER_STATE_ZOMBIE && peer->state != ENET_PEER_STATE_DISCONNECTING) {
enet_peer_reset_queues(peer);
command.header.command = ENET_PROTOCOL_COMMAND_DISCONNECT | ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED;
command.header.channelID = 0xFF;
command.disconnect.data = ENET_HOST_TO_NET_32(data);
enet_peer_queue_outgoing_command(peer, &command, NULL, 0, 0);
enet_host_flush(peer->host);
}
enet_peer_reset(peer);
}
void enet_peer_disconnect(ENetPeer* peer, uint32_t data) {
ENetProtocol command;
if (peer->state == ENET_PEER_STATE_DISCONNECTING || peer->state == ENET_PEER_STATE_DISCONNECTED || peer->state == ENET_PEER_STATE_ACKNOWLEDGING_DISCONNECT || peer->state == ENET_PEER_STATE_ZOMBIE)
return;
enet_peer_reset_queues(peer);
command.header.command = ENET_PROTOCOL_COMMAND_DISCONNECT;
command.header.channelID = 0xFF;
command.disconnect.data = ENET_HOST_TO_NET_32(data);
if (peer->state == ENET_PEER_STATE_CONNECTED || peer->state == ENET_PEER_STATE_DISCONNECT_LATER)
command.header.command |= ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
else
command.header.command |= ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED;
enet_peer_queue_outgoing_command(peer, &command, NULL, 0, 0);
if (peer->state == ENET_PEER_STATE_CONNECTED || peer->state == ENET_PEER_STATE_DISCONNECT_LATER) {
enet_peer_on_disconnect(peer);
peer->state = ENET_PEER_STATE_DISCONNECTING;
} else {
enet_host_flush(peer->host);
enet_peer_reset(peer);
}
}
void enet_peer_disconnect_later(ENetPeer* peer, uint32_t data) {
if ((peer->state == ENET_PEER_STATE_CONNECTED || peer->state == ENET_PEER_STATE_DISCONNECT_LATER) && !(enet_list_empty(&peer->outgoingCommands) && enet_list_empty(&peer->sentReliableCommands))) {
peer->state = ENET_PEER_STATE_DISCONNECT_LATER;
peer->eventData = data;
} else {
enet_peer_disconnect(peer, data);
}
}
ENetAcknowledgement* enet_peer_queue_acknowledgement(ENetPeer* peer, const ENetProtocol* command, uint16_t sentTime) {
ENetAcknowledgement* acknowledgement;
if (command->header.channelID < peer->channelCount) {
ENetChannel* channel = &peer->channels[command->header.channelID];
uint16_t reliableWindow = command->header.reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
uint16_t currentWindow = channel->incomingReliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
if (command->header.reliableSequenceNumber < channel->incomingReliableSequenceNumber)
reliableWindow += ENET_PEER_RELIABLE_WINDOWS;
if (reliableWindow >= currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS - 1 && reliableWindow <= currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS)
return NULL;
}
acknowledgement = (ENetAcknowledgement*)enet_malloc(sizeof(ENetAcknowledgement));
if (acknowledgement == NULL)
return NULL;
peer->outgoingDataTotal += sizeof(ENetProtocolAcknowledge);
acknowledgement->sentTime = sentTime;
acknowledgement->command = *command;
enet_list_insert(enet_list_end(&peer->acknowledgements), acknowledgement);
return acknowledgement;
}
void enet_peer_setup_outgoing_command(ENetPeer* peer, ENetOutgoingCommand* outgoingCommand) {
ENetChannel* channel = &peer->channels[outgoingCommand->command.header.channelID];
peer->outgoingDataTotal += enet_protocol_command_size(outgoingCommand->command.header.command) + outgoingCommand->fragmentLength;
if (outgoingCommand->command.header.channelID == 0xFF) {
++peer->outgoingReliableSequenceNumber;
outgoingCommand->reliableSequenceNumber = peer->outgoingReliableSequenceNumber;
outgoingCommand->unreliableSequenceNumber = 0;
} else if (outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE) {
++channel->outgoingReliableSequenceNumber;
channel->outgoingUnreliableSequenceNumber = 0;
outgoingCommand->reliableSequenceNumber = channel->outgoingReliableSequenceNumber;
outgoingCommand->unreliableSequenceNumber = 0;
} else if (outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED) {
++peer->outgoingUnsequencedGroup;
outgoingCommand->reliableSequenceNumber = 0;
outgoingCommand->unreliableSequenceNumber = 0;
} else {
if (outgoingCommand->fragmentOffset == 0)
++channel->outgoingUnreliableSequenceNumber;
outgoingCommand->reliableSequenceNumber = channel->outgoingReliableSequenceNumber;
outgoingCommand->unreliableSequenceNumber = channel->outgoingUnreliableSequenceNumber;
}
outgoingCommand->sendAttempts = 0;
outgoingCommand->sentTime = 0;
outgoingCommand->roundTripTimeout = 0;
outgoingCommand->roundTripTimeoutLimit = 0;
outgoingCommand->command.header.reliableSequenceNumber = ENET_HOST_TO_NET_16(outgoingCommand->reliableSequenceNumber);
switch (outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK) {
case ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE:
outgoingCommand->command.sendUnreliable.unreliableSequenceNumber = ENET_HOST_TO_NET_16(outgoingCommand->unreliableSequenceNumber);
break;
case ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED:
outgoingCommand->command.sendUnsequenced.unsequencedGroup = ENET_HOST_TO_NET_16(peer->outgoingUnsequencedGroup);
break;
default:
break;
}
enet_list_insert(enet_list_end(&peer->outgoingCommands), outgoingCommand);
}
ENetOutgoingCommand* enet_peer_queue_outgoing_command(ENetPeer* peer, const ENetProtocol* command, ENetPacket* packet, uint32_t offset, uint16_t length) {
ENetOutgoingCommand* outgoingCommand = (ENetOutgoingCommand*)enet_malloc(sizeof(ENetOutgoingCommand));
if (outgoingCommand == NULL)
return NULL;
outgoingCommand->command = *command;
outgoingCommand->fragmentOffset = offset;
outgoingCommand->fragmentLength = length;
outgoingCommand->packet = packet;
if (packet != NULL)
++packet->referenceCount;
enet_peer_setup_outgoing_command(peer, outgoingCommand);
return outgoingCommand;
}
void enet_peer_dispatch_incoming_unreliable_commands(ENetPeer* peer, ENetChannel* channel, ENetIncomingCommand* queuedCommand) {
ENetListIterator droppedCommand, startCommand, currentCommand;
for (droppedCommand = startCommand = currentCommand = enet_list_begin(&channel->incomingUnreliableCommands); currentCommand != enet_list_end(&channel->incomingUnreliableCommands); currentCommand = enet_list_next(currentCommand)) {
ENetIncomingCommand* incomingCommand = (ENetIncomingCommand*)currentCommand;
if ((incomingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK) == ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED)
continue;
if (incomingCommand->reliableSequenceNumber == channel->incomingReliableSequenceNumber) {
if (incomingCommand->fragmentsRemaining <= 0) {
channel->incomingUnreliableSequenceNumber = incomingCommand->unreliableSequenceNumber;
continue;
}
if (startCommand != currentCommand) {
enet_list_move(enet_list_end(&peer->dispatchedCommands), startCommand, enet_list_previous(currentCommand));
if (!peer->needsDispatch) {
enet_list_insert(enet_list_end(&peer->host->dispatchQueue), &peer->dispatchList);
peer->needsDispatch = 1;
}
droppedCommand = currentCommand;
} else if (droppedCommand != currentCommand) {
droppedCommand = enet_list_previous(currentCommand);
}
} else {
uint16_t reliableWindow = incomingCommand->reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
uint16_t currentWindow = channel->incomingReliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
if (incomingCommand->reliableSequenceNumber < channel->incomingReliableSequenceNumber)
reliableWindow += ENET_PEER_RELIABLE_WINDOWS;
if (reliableWindow >= currentWindow && reliableWindow < currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS - 1)
break;
droppedCommand = enet_list_next(currentCommand);
if (startCommand != currentCommand) {
enet_list_move(enet_list_end(&peer->dispatchedCommands), startCommand, enet_list_previous(currentCommand));
if (!peer->needsDispatch) {
enet_list_insert(enet_list_end(&peer->host->dispatchQueue), &peer->dispatchList);
peer->needsDispatch = 1;
}
}
}
startCommand = enet_list_next(currentCommand);
}
if (startCommand != currentCommand) {
enet_list_move(enet_list_end(&peer->dispatchedCommands), startCommand, enet_list_previous(currentCommand));
if (!peer->needsDispatch) {
enet_list_insert(enet_list_end(&peer->host->dispatchQueue), &peer->dispatchList);
peer->needsDispatch = 1;
}
droppedCommand = currentCommand;
}
enet_peer_remove_incoming_commands(&channel->incomingUnreliableCommands, enet_list_begin(&channel->incomingUnreliableCommands), droppedCommand, queuedCommand);
}
void enet_peer_dispatch_incoming_reliable_commands(ENetPeer* peer, ENetChannel* channel, ENetIncomingCommand* queuedCommand) {
ENetListIterator currentCommand;
for (currentCommand = enet_list_begin(&channel->incomingReliableCommands); currentCommand != enet_list_end(&channel->incomingReliableCommands); currentCommand = enet_list_next(currentCommand)) {
ENetIncomingCommand* incomingCommand = (ENetIncomingCommand*)currentCommand;
if (incomingCommand->fragmentsRemaining > 0 || incomingCommand->reliableSequenceNumber != (uint16_t)(channel->incomingReliableSequenceNumber + 1))
break;
channel->incomingReliableSequenceNumber = incomingCommand->reliableSequenceNumber;
if (incomingCommand->fragmentCount > 0)
channel->incomingReliableSequenceNumber += incomingCommand->fragmentCount - 1;
}
if (currentCommand == enet_list_begin(&channel->incomingReliableCommands))
return;
channel->incomingUnreliableSequenceNumber = 0;
enet_list_move(enet_list_end(&peer->dispatchedCommands), enet_list_begin(&channel->incomingReliableCommands), enet_list_previous(currentCommand));
if (!peer->needsDispatch) {
enet_list_insert(enet_list_end(&peer->host->dispatchQueue), &peer->dispatchList);
peer->needsDispatch = 1;
}
if (!enet_list_empty(&channel->incomingUnreliableCommands))
enet_peer_dispatch_incoming_unreliable_commands(peer, channel, queuedCommand);
}
ENetIncomingCommand* enet_peer_queue_incoming_command(ENetPeer* peer, const ENetProtocol* command, const void* data, size_t dataLength, uint32_t flags, uint32_t fragmentCount) {
static ENetIncomingCommand dummyCommand;
ENetChannel* channel = &peer->channels[command->header.channelID];
uint32_t unreliableSequenceNumber = 0, reliableSequenceNumber = 0;
uint16_t reliableWindow, currentWindow;
ENetIncomingCommand* incomingCommand;
ENetListIterator currentCommand;
ENetPacket* packet = NULL;
if (peer->state == ENET_PEER_STATE_DISCONNECT_LATER)
goto discardCommand;
if ((command->header.command & ENET_PROTOCOL_COMMAND_MASK) != ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED) {
reliableSequenceNumber = command->header.reliableSequenceNumber;
reliableWindow = reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
currentWindow = channel->incomingReliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
if (reliableSequenceNumber < channel->incomingReliableSequenceNumber)
reliableWindow += ENET_PEER_RELIABLE_WINDOWS;
if (reliableWindow < currentWindow || reliableWindow >= currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS - 1)
goto discardCommand;
}
switch (command->header.command & ENET_PROTOCOL_COMMAND_MASK) {
case ENET_PROTOCOL_COMMAND_SEND_FRAGMENT:
case ENET_PROTOCOL_COMMAND_SEND_RELIABLE:
if (reliableSequenceNumber == channel->incomingReliableSequenceNumber)
goto discardCommand;
for (currentCommand = enet_list_previous(enet_list_end(&channel->incomingReliableCommands)); currentCommand != enet_list_end(&channel->incomingReliableCommands); currentCommand = enet_list_previous(currentCommand)) {
incomingCommand = (ENetIncomingCommand*)currentCommand;
if (reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
if (incomingCommand->reliableSequenceNumber < channel->incomingReliableSequenceNumber)
continue;
} else if (incomingCommand->reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
break;
}
if (incomingCommand->reliableSequenceNumber <= reliableSequenceNumber) {
if (incomingCommand->reliableSequenceNumber < reliableSequenceNumber)
break;
goto discardCommand;
}
}
break;
case ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE:
case ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE_FRAGMENT:
unreliableSequenceNumber = ENET_NET_TO_HOST_16(command->sendUnreliable.unreliableSequenceNumber);
if (reliableSequenceNumber == channel->incomingReliableSequenceNumber && unreliableSequenceNumber <= channel->incomingUnreliableSequenceNumber)
goto discardCommand;
for (currentCommand = enet_list_previous(enet_list_end(&channel->incomingUnreliableCommands)); currentCommand != enet_list_end(&channel->incomingUnreliableCommands); currentCommand = enet_list_previous(currentCommand)) {
incomingCommand = (ENetIncomingCommand*)currentCommand;
if ((command->header.command & ENET_PROTOCOL_COMMAND_MASK) == ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED)
continue;
if (reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
if (incomingCommand->reliableSequenceNumber < channel->incomingReliableSequenceNumber)
continue;
} else if (incomingCommand->reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
break;
}
if (incomingCommand->reliableSequenceNumber < reliableSequenceNumber)
break;
if (incomingCommand->reliableSequenceNumber > reliableSequenceNumber)
continue;
if (incomingCommand->unreliableSequenceNumber <= unreliableSequenceNumber) {
if (incomingCommand->unreliableSequenceNumber < unreliableSequenceNumber)
break;
goto discardCommand;
}
}
break;
case ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED:
currentCommand = enet_list_end(&channel->incomingUnreliableCommands);
break;
default:
goto discardCommand;
}
if (peer->totalWaitingData >= peer->host->maximumWaitingData)
goto notifyError;
packet = enet_packet_create(data, dataLength, flags);
if (packet == NULL)
goto notifyError;
incomingCommand = (ENetIncomingCommand*)enet_malloc(sizeof(ENetIncomingCommand));
if (incomingCommand == NULL)
goto notifyError;
incomingCommand->reliableSequenceNumber = command->header.reliableSequenceNumber;
incomingCommand->unreliableSequenceNumber = unreliableSequenceNumber & 0xFFFF;
incomingCommand->command = *command;
incomingCommand->fragmentCount = fragmentCount;
incomingCommand->fragmentsRemaining = fragmentCount;
incomingCommand->packet = packet;
incomingCommand->fragments = NULL;
if (fragmentCount > 0) {
if (fragmentCount <= ENET_PROTOCOL_MAXIMUM_FRAGMENT_COUNT)
incomingCommand->fragments = (uint32_t*)enet_malloc((fragmentCount + 31) / 32 * sizeof(uint32_t));
if (incomingCommand->fragments == NULL) {
enet_free(incomingCommand);
goto notifyError;
}
memset(incomingCommand->fragments, 0, (fragmentCount + 31) / 32 * sizeof(uint32_t));
}
if (packet != NULL) {
++packet->referenceCount;
peer->totalWaitingData += packet->dataLength;
}
enet_list_insert(enet_list_next(currentCommand), incomingCommand);
switch (command->header.command & ENET_PROTOCOL_COMMAND_MASK) {
case ENET_PROTOCOL_COMMAND_SEND_FRAGMENT:
case ENET_PROTOCOL_COMMAND_SEND_RELIABLE:
enet_peer_dispatch_incoming_reliable_commands(peer, channel, incomingCommand);
break;
default:
enet_peer_dispatch_incoming_unreliable_commands(peer, channel, incomingCommand);
break;
}
return incomingCommand;
discardCommand:
if (fragmentCount > 0)
goto notifyError;
if (packet != NULL && packet->referenceCount == 0)
enet_packet_destroy(packet);
return &dummyCommand;
notifyError:
if (packet != NULL && packet->referenceCount == 0)
enet_packet_destroy(packet);
return NULL;
}
/*
=======================================================================
Host
=======================================================================
*/
ENetHost* enet_host_create(const ENetAddress* address, size_t peerCount, size_t channelLimit, uint32_t incomingBandwidth, uint32_t outgoingBandwidth, int bufferSize) {
ENetHost* host;
ENetPeer* currentPeer;
if (peerCount > ENET_PROTOCOL_MAXIMUM_PEER_ID)
return NULL;
host = (ENetHost*)enet_malloc(sizeof(ENetHost));
if (host == NULL)
return NULL;
memset(host, 0, sizeof(ENetHost));
host->peers = (ENetPeer*)enet_malloc(peerCount * sizeof(ENetPeer));
if (host->peers == NULL) {
enet_free(host);
return NULL;
}
memset(host->peers, 0, peerCount * sizeof(ENetPeer));
host->socket = enet_socket_create(ENET_SOCKET_TYPE_DATAGRAM);
if (host->socket != ENET_SOCKET_NULL)
enet_socket_set_option(host->socket, ENET_SOCKOPT_IPV6_V6ONLY, 0);
if (host->socket == ENET_SOCKET_NULL || (address != NULL && enet_socket_bind(host->socket, address) < 0)) {
if (host->socket != ENET_SOCKET_NULL)
enet_socket_destroy(host->socket);
enet_free(host->peers);
enet_free(host);
return NULL;
}
if (bufferSize > ENET_HOST_BUFFER_SIZE_MAX)
bufferSize = ENET_HOST_BUFFER_SIZE_MAX;
else if (bufferSize < ENET_HOST_BUFFER_SIZE_MIN)
bufferSize = ENET_HOST_BUFFER_SIZE_MIN;
enet_socket_set_option(host->socket, ENET_SOCKOPT_NONBLOCK, 1);
enet_socket_set_option(host->socket, ENET_SOCKOPT_BROADCAST, 1);
enet_socket_set_option(host->socket, ENET_SOCKOPT_RCVBUF, bufferSize);
enet_socket_set_option(host->socket, ENET_SOCKOPT_SNDBUF, bufferSize);
if (address != NULL && enet_socket_get_address(host->socket, &host->address) < 0)
host->address = *address;
if (!channelLimit || channelLimit > ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT)
channelLimit = ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT;
else if (channelLimit < ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT)
channelLimit = ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT;
host->randomSeed = (uint32_t)(size_t)host;
host->randomSeed += enet_host_random_seed();
host->randomSeed = (host->randomSeed << 16) | (host->randomSeed >> 16);
host->channelLimit = channelLimit;
host->incomingBandwidth = incomingBandwidth;
host->outgoingBandwidth = outgoingBandwidth;
host->bandwidthThrottleEpoch = 0;
host->recalculateBandwidthLimits = 0;
host->preventConnections = 0;
host->mtu = ENET_HOST_DEFAULT_MTU;
host->peerCount = peerCount;
host->commandCount = 0;
host->bufferCount = 0;
host->checksumCallback = NULL;
host->receivedAddress.ipv6 = ENET_HOST_ANY;
host->receivedAddress.port = 0;
host->receivedData = NULL;
host->receivedDataLength = 0;
host->totalSentData = 0;
host->totalSentPackets = 0;
host->totalReceivedData = 0;
host->totalReceivedPackets = 0;
host->connectedPeers = 0;
host->bandwidthLimitedPeers = 0;
host->duplicatePeers = ENET_PROTOCOL_MAXIMUM_PEER_ID;
host->maximumPacketSize = ENET_HOST_DEFAULT_MAXIMUM_PACKET_SIZE;
host->maximumWaitingData = ENET_HOST_DEFAULT_MAXIMUM_WAITING_DATA;
host->interceptCallback = NULL;
enet_list_clear(&host->dispatchQueue);
for (currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
currentPeer->host = host;
currentPeer->incomingPeerID = currentPeer - host->peers;
currentPeer->outgoingSessionID = currentPeer->incomingSessionID = 0xFF;
currentPeer->data = NULL;
enet_list_clear(&currentPeer->acknowledgements);
enet_list_clear(&currentPeer->sentReliableCommands);
enet_list_clear(&currentPeer->sentUnreliableCommands);
enet_list_clear(&currentPeer->outgoingCommands);
enet_list_clear(&currentPeer->dispatchedCommands);
enet_peer_reset(currentPeer);
}
return host;
}
void enet_host_destroy(ENetHost* host) {
ENetPeer* currentPeer;
if (host == NULL)
return;
enet_socket_destroy(host->socket);
for (currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
enet_peer_reset(currentPeer);
}
enet_free(host->peers);
enet_free(host);
}
void enet_host_prevent_connections(ENetHost* host, uint8_t state) {
if (host == NULL)
return;
host->preventConnections = state;
}
ENetPeer* enet_host_connect(ENetHost* host, const ENetAddress* address, size_t channelCount, uint32_t data) {
ENetPeer* currentPeer;
ENetChannel* channel;
ENetProtocol command;
if (channelCount < ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT)
channelCount = ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT;
else if (channelCount > ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT)
channelCount = ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT;
for (currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
if (currentPeer->state == ENET_PEER_STATE_DISCONNECTED)
break;
}
if (currentPeer >= &host->peers[host->peerCount])
return NULL;
currentPeer->channels = (ENetChannel*)enet_malloc(channelCount * sizeof(ENetChannel));
if (currentPeer->channels == NULL)
return NULL;
currentPeer->channelCount = channelCount;
currentPeer->state = ENET_PEER_STATE_CONNECTING;
currentPeer->address = *address;
currentPeer->connectID = ++host->randomSeed;
if (host->outgoingBandwidth == 0)
currentPeer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
else
currentPeer->windowSize = (host->outgoingBandwidth / ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
if (currentPeer->windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
currentPeer->windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
else if (currentPeer->windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
currentPeer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
for (channel = currentPeer->channels; channel < &currentPeer->channels[channelCount]; ++channel) {
channel->outgoingReliableSequenceNumber = 0;
channel->outgoingUnreliableSequenceNumber = 0;
channel->incomingReliableSequenceNumber = 0;
channel->incomingUnreliableSequenceNumber = 0;
enet_list_clear(&channel->incomingReliableCommands);
enet_list_clear(&channel->incomingUnreliableCommands);
channel->usedReliableWindows = 0;
memset(channel->reliableWindows, 0, sizeof(channel->reliableWindows));
}
command.header.command = ENET_PROTOCOL_COMMAND_CONNECT | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
command.header.channelID = 0xFF;
command.connect.outgoingPeerID = ENET_HOST_TO_NET_16(currentPeer->incomingPeerID);
command.connect.incomingSessionID = currentPeer->incomingSessionID;
command.connect.outgoingSessionID = currentPeer->outgoingSessionID;
command.connect.mtu = ENET_HOST_TO_NET_32(currentPeer->mtu);
command.connect.windowSize = ENET_HOST_TO_NET_32(currentPeer->windowSize);
command.connect.channelCount = ENET_HOST_TO_NET_32(channelCount);
command.connect.incomingBandwidth = ENET_HOST_TO_NET_32(host->incomingBandwidth);
command.connect.outgoingBandwidth = ENET_HOST_TO_NET_32(host->outgoingBandwidth);
command.connect.packetThrottleInterval = ENET_HOST_TO_NET_32(currentPeer->packetThrottleInterval);
command.connect.packetThrottleAcceleration = ENET_HOST_TO_NET_32(currentPeer->packetThrottleAcceleration);
command.connect.packetThrottleDeceleration = ENET_HOST_TO_NET_32(currentPeer->packetThrottleDeceleration);
command.connect.connectID = currentPeer->connectID;
command.connect.data = ENET_HOST_TO_NET_32(data);
enet_peer_queue_outgoing_command(currentPeer, &command, NULL, 0, 0);
return currentPeer;
}
void enet_host_broadcast(ENetHost* host, uint8_t channelID, ENetPacket* packet) {
ENetPeer* currentPeer;
if (packet->flags & ENET_PACKET_FLAG_INSTANT)
++packet->referenceCount;
for (currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
if (currentPeer->state != ENET_PEER_STATE_CONNECTED)
continue;
enet_peer_send(currentPeer, channelID, packet);
}
if (packet->flags & ENET_PACKET_FLAG_INSTANT)
--packet->referenceCount;
if (packet->referenceCount == 0)
enet_packet_destroy(packet);
}
void enet_host_broadcast_exclude(ENetHost* host, uint8_t channelID, ENetPacket* packet, ENetPeer* excludedPeer) {
ENetPeer* currentPeer;
if (packet->flags & ENET_PACKET_FLAG_INSTANT)
++packet->referenceCount;
for (currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
if (currentPeer->state != ENET_PEER_STATE_CONNECTED || currentPeer == excludedPeer)
continue;
enet_peer_send(currentPeer, channelID, packet);
}
if (packet->flags & ENET_PACKET_FLAG_INSTANT)
--packet->referenceCount;
if (packet->referenceCount == 0)
enet_packet_destroy(packet);
}
void enet_host_broadcast_selective(ENetHost* host, uint8_t channelID, ENetPacket* packet, ENetPeer** peers, size_t length) {
ENetPeer* currentPeer;
size_t i;
if (host == NULL)
return;
if (packet->flags & ENET_PACKET_FLAG_INSTANT)
++packet->referenceCount;
for (i = 0; i < length; i++) {
currentPeer = peers[i];
if (currentPeer == NULL || currentPeer->state != ENET_PEER_STATE_CONNECTED)
continue;
enet_peer_send(currentPeer, channelID, packet);
}
if (packet->flags & ENET_PACKET_FLAG_INSTANT)
--packet->referenceCount;
if (packet->referenceCount == 0)
enet_packet_destroy(packet);
}
void enet_host_channel_limit(ENetHost* host, size_t channelLimit) {
if (!channelLimit || channelLimit > ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT)
channelLimit = ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT;
else if (channelLimit < ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT)
channelLimit = ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT;
host->channelLimit = channelLimit;
}
void enet_host_bandwidth_limit(ENetHost* host, uint32_t incomingBandwidth, uint32_t outgoingBandwidth) {
host->incomingBandwidth = incomingBandwidth;
host->outgoingBandwidth = outgoingBandwidth;
host->recalculateBandwidthLimits = 1;
}
void enet_host_bandwidth_throttle(ENetHost* host) {
uint32_t timeCurrent = enet_time_get();
uint32_t elapsedTime = timeCurrent - host->bandwidthThrottleEpoch;
uint32_t peersRemaining = (uint32_t)host->connectedPeers;
uint32_t dataTotal = ~0;
uint32_t bandwidth = ~0;
uint32_t throttle = 0;
uint32_t bandwidthLimit = 0;
int needsAdjustment = host->bandwidthLimitedPeers > 0 ? 1 : 0;
ENetPeer* peer;
ENetProtocol command;
if (elapsedTime < ENET_HOST_BANDWIDTH_THROTTLE_INTERVAL)
return;
if (host->outgoingBandwidth == 0 && host->incomingBandwidth == 0)
return;
host->bandwidthThrottleEpoch = timeCurrent;
if (peersRemaining == 0)
return;
if (host->outgoingBandwidth != 0) {
dataTotal = 0;
bandwidth = (host->outgoingBandwidth * elapsedTime) / 1000;
for (peer = host->peers; peer < &host->peers[host->peerCount]; ++peer) {
if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)
continue;
dataTotal += peer->outgoingDataTotal;
}
}
while (peersRemaining > 0 && needsAdjustment != 0) {
needsAdjustment = 0;
if (dataTotal <= bandwidth)
throttle = ENET_PEER_PACKET_THROTTLE_SCALE;
else
throttle = (bandwidth * ENET_PEER_PACKET_THROTTLE_SCALE) / dataTotal;
for (peer = host->peers; peer < &host->peers[host->peerCount]; ++peer) {
uint32_t peerBandwidth;
if ((peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) || peer->incomingBandwidth == 0 || peer->outgoingBandwidthThrottleEpoch == timeCurrent)
continue;
peerBandwidth = (peer->incomingBandwidth * elapsedTime) / 1000;
if ((throttle * peer->outgoingDataTotal) / ENET_PEER_PACKET_THROTTLE_SCALE <= peerBandwidth)
continue;
peer->packetThrottleLimit = (peerBandwidth * ENET_PEER_PACKET_THROTTLE_SCALE) / peer->outgoingDataTotal;
if (peer->packetThrottleLimit == 0)
peer->packetThrottleLimit = 1;
if (peer->packetThrottle > peer->packetThrottleLimit)
peer->packetThrottle = peer->packetThrottleLimit;
peer->outgoingBandwidthThrottleEpoch = timeCurrent;
peer->incomingDataTotal = 0;
peer->outgoingDataTotal = 0;
needsAdjustment = 1;
--peersRemaining;
bandwidth -= peerBandwidth;
dataTotal -= peerBandwidth;
}
}
if (peersRemaining > 0) {
if (dataTotal <= bandwidth)
throttle = ENET_PEER_PACKET_THROTTLE_SCALE;
else
throttle = (bandwidth * ENET_PEER_PACKET_THROTTLE_SCALE) / dataTotal;
for (peer = host->peers; peer < &host->peers[host->peerCount]; ++peer) {
if ((peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) || peer->outgoingBandwidthThrottleEpoch == timeCurrent)
continue;
peer->packetThrottleLimit = throttle;
if (peer->packetThrottle > peer->packetThrottleLimit)
peer->packetThrottle = peer->packetThrottleLimit;
peer->incomingDataTotal = 0;
peer->outgoingDataTotal = 0;
}
}
if (host->recalculateBandwidthLimits) {
host->recalculateBandwidthLimits = 0;
peersRemaining = (uint32_t)host->connectedPeers;
bandwidth = host->incomingBandwidth;
needsAdjustment = 1;
if (bandwidth == 0) {
bandwidthLimit = 0;
} else {
while (peersRemaining > 0 && needsAdjustment != 0) {
needsAdjustment = 0;
bandwidthLimit = bandwidth / peersRemaining;
for (peer = host->peers; peer < &host->peers[host->peerCount]; ++peer) {
if ((peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) || peer->incomingBandwidthThrottleEpoch == timeCurrent)
continue;
if (peer->outgoingBandwidth > 0 && peer->outgoingBandwidth >= bandwidthLimit)
continue;
peer->incomingBandwidthThrottleEpoch = timeCurrent;
needsAdjustment = 1;
--peersRemaining;
bandwidth -= peer->outgoingBandwidth;
}
}
}
for (peer = host->peers; peer < &host->peers[host->peerCount]; ++peer) {
if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)
continue;
command.header.command = ENET_PROTOCOL_COMMAND_BANDWIDTH_LIMIT | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
command.header.channelID = 0xFF;
command.bandwidthLimit.outgoingBandwidth = ENET_HOST_TO_NET_32(host->outgoingBandwidth);
if (peer->incomingBandwidthThrottleEpoch == timeCurrent)
command.bandwidthLimit.incomingBandwidth = ENET_HOST_TO_NET_32(peer->outgoingBandwidth);
else
command.bandwidthLimit.incomingBandwidth = ENET_HOST_TO_NET_32(bandwidthLimit);
enet_peer_queue_outgoing_command(peer, &command, NULL, 0, 0);
}
}
}
/*
=======================================================================
Address
=======================================================================
*/
int enet_address_set_ip(ENetAddress* address, const char* ip) {
int type = AF_INET6;
void* destination = &address->ipv6;
if (strchr(ip, ':') == NULL) {
type = AF_INET;
memset(address, 0, sizeof(address->ipv4.zeros));
address->ipv4.ffff = 0xFFFF;
destination = &address->ipv4.ip;
}
if (!inet_pton(type, ip, destination))
return -1;
return 0;
}
int enet_address_set_hostname(ENetAddress* address, const char* name) {
struct addrinfo hints, *resultList = NULL, *result = NULL;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
if (getaddrinfo(name, NULL, &hints, &resultList) != 0)
return -1;
for (result = resultList; result != NULL; result = result->ai_next) {
if (result->ai_addr != NULL && result->ai_addrlen >= sizeof(struct sockaddr_in)) {
if (result->ai_family == AF_INET) {
struct sockaddr_in* sin = (struct sockaddr_in*)result->ai_addr;
memset(address, 0, sizeof(address->ipv4.zeros));
address->ipv4.ffff = 0xFFFF;
address->ipv4.ip.s_addr = sin->sin_addr.s_addr;
freeaddrinfo(resultList);
return 0;
} else if (result->ai_family == AF_INET6) {
struct sockaddr_in6* sin = (struct sockaddr_in6*)result->ai_addr;
address->ipv6 = sin->sin6_addr;
freeaddrinfo(resultList);
return 0;
}
}
}
if (resultList != NULL)
freeaddrinfo(resultList);
return enet_address_set_ip(address, name);
}
int enet_address_get_ip(const ENetAddress* address, char* ip, size_t ipLength) {
if (address->ipv4.ffff == 0xFFFF && enet_array_is_zeroed(address->ipv4.zeros, sizeof(address->ipv4.zeros)) == 0) {
if (inet_ntop(AF_INET, &address->ipv4.ip, ip, ipLength) == NULL)
return -1;
} else if (inet_ntop(AF_INET6, &address->ipv6, ip, ipLength) == NULL) {
return -1;
}
return 0;
}
int enet_address_get_hostname(const ENetAddress* address, char* name, size_t nameLength) {
struct sockaddr_in6 sin;
int err;
memset(&sin, 0, sizeof(struct sockaddr_in6));
sin.sin6_family = AF_INET6;
sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
sin.sin6_addr = address->ipv6;
err = getnameinfo((struct sockaddr*)&sin, sizeof(sin), name, nameLength, NULL, 0, NI_NAMEREQD);
if (!err) {
if (name != NULL && nameLength > 0 && !memchr(name, '\0', nameLength))
return -1;
return 0;
}
if (err != EAI_NONAME)
return -1;
return enet_address_get_ip(address, name, nameLength);
}
/*
=======================================================================
Platform-specific (Unix)
=======================================================================
*/
#ifndef _WIN32
int enet_initialize(void) {
return 0;
}
void enet_deinitialize(void) { }
uint64_t enet_host_random_seed(void) {
struct timeval timeVal;
gettimeofday(&timeVal, NULL);
return (timeVal.tv_sec * 1000) ^ (timeVal.tv_usec / 1000);
}
int enet_socket_bind(ENetSocket socket, const ENetAddress* address) {
struct sockaddr_in6 sin;
memset(&sin, 0, sizeof(struct sockaddr_in6));
sin.sin6_family = AF_INET6;
if (address != NULL) {
sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
sin.sin6_addr = address->ipv6;
} else {
sin.sin6_port = 0;
sin.sin6_addr = ENET_HOST_ANY;
}
return bind(socket, (struct sockaddr*)&sin, sizeof(struct sockaddr_in6));
}
int enet_socket_get_address(ENetSocket socket, ENetAddress* address) {
struct sockaddr_storage ss;
socklen_t saLength = sizeof(ss);
if (getsockname(socket, (struct sockaddr*)&ss, &saLength) == -1)
return -1;
if (ss.ss_family == AF_INET) {
struct sockaddr_in* sin = (struct sockaddr_in*)&ss;
memset(address, 0, sizeof(address->ipv4.zeros));
address->ipv4.ffff = 0xFFFF;
address->ipv4.ip = sin->sin_addr;
address->port = ENET_NET_TO_HOST_16(sin->sin_port);
} else if (ss.ss_family == AF_INET6) {
struct sockaddr_in6* sin = (struct sockaddr_in6*)&ss;
address->ipv6 = sin->sin6_addr;
address->port = ENET_NET_TO_HOST_16(sin->sin6_port);
}
return 0;
}
int enet_socket_listen(ENetSocket socket, int backlog) {
return listen(socket, backlog < 0 ? SOMAXCONN : backlog);
}
ENetSocket enet_socket_create(ENetSocketType type) {
int socketType = (type == ENET_SOCKET_TYPE_DATAGRAM ? SOCK_DGRAM : SOCK_STREAM);
#ifdef SOCK_CLOEXEC
socketType |= SOCK_CLOEXEC;
#endif
return socket(PF_INET6, socketType, 0);
}
int enet_socket_set_option(ENetSocket socket, ENetSocketOption option, int value) {
int result = -1;
switch (option) {
case ENET_SOCKOPT_NONBLOCK:
result = fcntl(socket, F_SETFL, (value ? O_NONBLOCK : 0) | (fcntl(socket, F_GETFL) & ~O_NONBLOCK));
break;
case ENET_SOCKOPT_BROADCAST:
result = setsockopt(socket, SOL_SOCKET, SO_BROADCAST, (char*)&value, sizeof(int));
break;
case ENET_SOCKOPT_REUSEADDR:
result = setsockopt(socket, SOL_SOCKET, SO_REUSEADDR, (char*)&value, sizeof(int));
break;
case ENET_SOCKOPT_RCVBUF:
result = setsockopt(socket, SOL_SOCKET, SO_RCVBUF, (char*)&value, sizeof(int));
break;
case ENET_SOCKOPT_SNDBUF:
result = setsockopt(socket, SOL_SOCKET, SO_SNDBUF, (char*)&value, sizeof(int));
break;
case ENET_SOCKOPT_RCVTIMEO: {
struct timeval timeVal;
timeVal.tv_sec = value / 1000;
timeVal.tv_usec = (value % 1000) * 1000;
result = setsockopt(socket, SOL_SOCKET, SO_RCVTIMEO, (char*)&timeVal, sizeof(struct timeval));
break;
}
case ENET_SOCKOPT_SNDTIMEO: {
struct timeval timeVal;
timeVal.tv_sec = value / 1000;
timeVal.tv_usec = (value % 1000) * 1000;
result = setsockopt(socket, SOL_SOCKET, SO_SNDTIMEO, (char*)&timeVal, sizeof(struct timeval));
break;
}
case ENET_SOCKOPT_NODELAY:
result = setsockopt(socket, IPPROTO_TCP, TCP_NODELAY, (char*)&value, sizeof(int));
break;
case ENET_SOCKOPT_IPV6_V6ONLY:
result = setsockopt(socket, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&value, sizeof(int));
break;
default:
break;
}
return result == -1 ? -1 : 0;
}
int enet_socket_get_option(ENetSocket socket, ENetSocketOption option, int* value) {
int result = -1;
socklen_t len;
switch (option) {
case ENET_SOCKOPT_ERROR:
len = sizeof(int);
result = getsockopt(socket, SOL_SOCKET, SO_ERROR, value, &len);
break;
default:
break;
}
return result == -1 ? -1 : 0;
}
int enet_socket_connect(ENetSocket socket, const ENetAddress* address) {
int result = -1;
struct sockaddr_in6 sin;
memset(&sin, 0, sizeof(struct sockaddr_in6));
sin.sin6_family = AF_INET6;
sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
sin.sin6_addr = address->ipv6;
result = connect(socket, (struct sockaddr*)&sin, sizeof(struct sockaddr_in6));
if (result == -1 && errno == EINPROGRESS)
return 0;
return result;
}
ENetSocket enet_socket_accept(ENetSocket socket, ENetAddress* address) {
int result = -1;
struct sockaddr_in6 sin;
socklen_t sinLength = sizeof(struct sockaddr_in6);
result = accept(socket, address != NULL ? (struct sockaddr*)&sin : NULL, address != NULL ? &sinLength : NULL);
if (result == -1)
return ENET_SOCKET_NULL;
if (address != NULL) {
address->ipv6 = sin.sin6_addr;
address->port = ENET_NET_TO_HOST_16(sin.sin6_port);
}
return result;
}
int enet_socket_shutdown(ENetSocket socket, ENetSocketShutdown how) {
return shutdown(socket, (int)how);
}
void enet_socket_destroy(ENetSocket socket) {
if (socket != ENET_SOCKET_NULL)
close(socket);
}
int enet_socket_send(ENetSocket socket, const ENetAddress* address, const ENetBuffer* buffers, size_t bufferCount) {
struct msghdr msgHdr;
struct sockaddr_in6 sin;
int sentLength;
memset(&msgHdr, 0, sizeof(struct msghdr));
if (address != NULL) {
memset(&sin, 0, sizeof(struct sockaddr_in6));
sin.sin6_family = AF_INET6;
sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
sin.sin6_addr = address->ipv6;
msgHdr.msg_name = &sin;
msgHdr.msg_namelen = sizeof(struct sockaddr_in6);
}
msgHdr.msg_iov = (struct iovec*)buffers;
msgHdr.msg_iovlen = bufferCount;
sentLength = sendmsg(socket, &msgHdr, MSG_NOSIGNAL);
if (sentLength == -1) {
if (errno == EWOULDBLOCK)
return 0;
return -1;
}
return sentLength;
}
int enet_socket_receive(ENetSocket socket, ENetAddress* address, ENetBuffer* buffers, size_t bufferCount) {
struct msghdr msgHdr;
struct sockaddr_in6 sin;
int recvLength;
memset(&msgHdr, 0, sizeof(struct msghdr));
if (address != NULL) {
msgHdr.msg_name = &sin;
msgHdr.msg_namelen = sizeof(struct sockaddr_in6);
}
msgHdr.msg_iov = (struct iovec*)buffers;
msgHdr.msg_iovlen = bufferCount;
recvLength = recvmsg(socket, &msgHdr, MSG_NOSIGNAL);
if (recvLength == -1) {
if (errno == EWOULDBLOCK)
return 0;
return -1;
}
if (msgHdr.msg_flags & MSG_TRUNC)
return -2;
if (address != NULL) {
address->ipv6 = sin.sin6_addr;
address->port = ENET_NET_TO_HOST_16(sin.sin6_port);
}
return recvLength;
}
int enet_socket_set_select(ENetSocket maxSocket, ENetSocketSet* readSet, ENetSocketSet* writeSet, uint32_t timeout) {
struct timeval timeVal;
timeVal.tv_sec = timeout / 1000;
timeVal.tv_usec = (timeout % 1000) * 1000;
return select(maxSocket + 1, readSet, writeSet, NULL, &timeVal);
}
int enet_socket_wait(ENetSocket socket, uint32_t* condition, uint64_t timeout) {
struct pollfd pollSocket;
int pollCount;
pollSocket.fd = socket;
pollSocket.events = 0;
if (*condition & ENET_SOCKET_WAIT_SEND)
pollSocket.events |= POLLOUT;
if (*condition & ENET_SOCKET_WAIT_RECEIVE)
pollSocket.events |= POLLIN;
pollCount = poll(&pollSocket, 1, timeout);
if (pollCount < 0) {
if (errno == EINTR && *condition & ENET_SOCKET_WAIT_INTERRUPT) {
*condition = ENET_SOCKET_WAIT_INTERRUPT;
return 0;
}
return -1;
}
*condition = ENET_SOCKET_WAIT_NONE;
if (pollCount == 0)
return 0;
if (pollSocket.revents & POLLOUT)
*condition |= ENET_SOCKET_WAIT_SEND;
if (pollSocket.revents & POLLIN)
*condition |= ENET_SOCKET_WAIT_RECEIVE;
return 0;
}
#endif
/*
=======================================================================
Platform-specific (Windows)
=======================================================================
*/
#ifdef _WIN32
int enet_initialize(void) {
WORD versionRequested = MAKEWORD(2, 2);
WSADATA wsaData;
if (WSAStartup(versionRequested, &wsaData))
return -1;
if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) {
WSACleanup();
return -1;
}
timeBeginPeriod(1);
return 0;
}
void enet_deinitialize(void) {
timeEndPeriod(1);
WSACleanup();
}
uint64_t enet_host_random_seed(void) {
return (uint64_t)timeGetTime();
}
int enet_socket_bind(ENetSocket socket, const ENetAddress* address) {
struct sockaddr_in6 sin;
memset(&sin, 0, sizeof(struct sockaddr_in6));
sin.sin6_family = AF_INET6;
if (address != NULL) {
sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
sin.sin6_addr = address->ipv6;
} else {
sin.sin6_port = 0;
sin.sin6_addr = in6addr_any;
}
return bind(socket, (struct sockaddr*)&sin, sizeof(struct sockaddr_in6)) == SOCKET_ERROR ? -1 : 0;
}
int enet_socket_get_address(ENetSocket socket, ENetAddress* address) {
struct sockaddr_storage ss;
int saLength = sizeof(ss);
if (getsockname(socket, (struct sockaddr*)&ss, &saLength) == -1)
return -1;
if (ss.ss_family == AF_INET) {
struct sockaddr_in* sin = (struct sockaddr_in*)&ss;
memset(address, 0, sizeof(address->ipv4.zeros));
address->ipv4.ffff = 0xFFFF;
address->ipv4.ip = sin->sin_addr;
address->port = ENET_NET_TO_HOST_16(sin->sin_port);
} else if (ss.ss_family == AF_INET6) {
struct sockaddr_in6* sin = (struct sockaddr_in6*)&ss;
address->ipv6 = sin->sin6_addr;
address->port = ENET_NET_TO_HOST_16(sin->sin6_port);
}
return 0;
}
int enet_socket_listen(ENetSocket socket, int backlog) {
return listen(socket, backlog < 0 ? SOMAXCONN : backlog) == SOCKET_ERROR ? -1 : 0;
}
ENetSocket enet_socket_create(ENetSocketType type) {
return socket(PF_INET6, type == ENET_SOCKET_TYPE_DATAGRAM ? SOCK_DGRAM : SOCK_STREAM, 0);
}
int enet_socket_set_option(ENetSocket socket, ENetSocketOption option, int value) {
int result = SOCKET_ERROR;
switch (option) {
case ENET_SOCKOPT_NONBLOCK: {
u_long nonBlocking = (u_long)value;
result = ioctlsocket(socket, FIONBIO, &nonBlocking);
break;
}
case ENET_SOCKOPT_BROADCAST:
result = setsockopt(socket, SOL_SOCKET, SO_BROADCAST, (char*)&value, sizeof(int));
break;
case ENET_SOCKOPT_REUSEADDR:
result = setsockopt(socket, SOL_SOCKET, SO_REUSEADDR, (char*)&value, sizeof(int));
break;
case ENET_SOCKOPT_RCVBUF:
result = setsockopt(socket, SOL_SOCKET, SO_RCVBUF, (char*)&value, sizeof(int));
break;
case ENET_SOCKOPT_SNDBUF:
result = setsockopt(socket, SOL_SOCKET, SO_SNDBUF, (char*)&value, sizeof(int));
break;
case ENET_SOCKOPT_RCVTIMEO:
result = setsockopt(socket, SOL_SOCKET, SO_RCVTIMEO, (char*)&value, sizeof(int));
break;
case ENET_SOCKOPT_SNDTIMEO:
result = setsockopt(socket, SOL_SOCKET, SO_SNDTIMEO, (char*)&value, sizeof(int));
break;
case ENET_SOCKOPT_NODELAY:
result = setsockopt(socket, IPPROTO_TCP, TCP_NODELAY, (char*)&value, sizeof(int));
break;
case ENET_SOCKOPT_IPV6_V6ONLY:
result = setsockopt(socket, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&value, sizeof(int));
break;
default:
break;
}
return result == SOCKET_ERROR ? -1 : 0;
}
int enet_socket_get_option(ENetSocket socket, ENetSocketOption option, int* value) {
int result = SOCKET_ERROR, len;
switch (option) {
case ENET_SOCKOPT_ERROR:
len = sizeof(int);
result = getsockopt(socket, SOL_SOCKET, SO_ERROR, (char*)value, &len);
break;
default:
break;
}
return result == SOCKET_ERROR ? -1 : 0;
}
int enet_socket_connect(ENetSocket socket, const ENetAddress* address) {
int result = -1;
struct sockaddr_in6 sin;
memset(&sin, 0, sizeof(struct sockaddr_in6));
sin.sin6_family = AF_INET6;
sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
sin.sin6_addr = address->ipv6;
result = connect(socket, (struct sockaddr*)&sin, sizeof(struct sockaddr_in6));
if (result == SOCKET_ERROR && WSAGetLastError() != WSAEWOULDBLOCK)
return -1;
return 0;
}
ENetSocket enet_socket_accept(ENetSocket socket, ENetAddress* address) {
SOCKET result;
struct sockaddr_in6 sin;
int sinLength = sizeof(struct sockaddr_in6);
result = accept(socket, address != NULL ? (struct sockaddr*)&sin : NULL, address != NULL ? &sinLength : NULL);
if (result == INVALID_SOCKET)
return ENET_SOCKET_NULL;
if (address != NULL) {
address->ipv6 = sin.sin6_addr;
address->port = ENET_NET_TO_HOST_16(sin.sin6_port);
}
return result;
}
int enet_socket_shutdown(ENetSocket socket, ENetSocketShutdown how) {
return shutdown(socket, (int)how) == SOCKET_ERROR ? -1 : 0;
}
void enet_socket_destroy(ENetSocket socket) {
if (socket != INVALID_SOCKET)
closesocket(socket);
}
int enet_socket_send(ENetSocket socket, const ENetAddress* address, const ENetBuffer* buffers, size_t bufferCount) {
struct sockaddr_in6 sin;
DWORD sentLength = 0;
if (address != NULL) {
memset(&sin, 0, sizeof(struct sockaddr_in6));
sin.sin6_family = AF_INET6;
sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
sin.sin6_addr = address->ipv6;
}
if (WSASendTo(socket, (LPWSABUF)buffers, (DWORD)bufferCount, &sentLength, 0, address != NULL ? (struct sockaddr*)&sin : NULL, address != NULL ? sizeof(struct sockaddr_in6) : 0, NULL, NULL) == SOCKET_ERROR)
return (WSAGetLastError() == WSAEWOULDBLOCK) ? 0 : -1;
return (int)sentLength;
}
int enet_socket_receive(ENetSocket socket, ENetAddress* address, ENetBuffer* buffers, size_t bufferCount) {
INT sinLength = sizeof(struct sockaddr_in6);
DWORD flags = 0, recvLength = 0;
struct sockaddr_in6 sin;
if (WSARecvFrom(socket, (LPWSABUF)buffers, (DWORD)bufferCount, &recvLength, &flags, address != NULL ? (struct sockaddr*)&sin : NULL, address != NULL ? &sinLength : NULL, NULL, NULL) == SOCKET_ERROR) {
switch (WSAGetLastError()) {
case WSAEWOULDBLOCK:
case WSAECONNRESET:
return 0;
}
return -1;
}
if (flags & MSG_PARTIAL)
return -2;
if (address != NULL) {
address->ipv6 = sin.sin6_addr;
address->port = ENET_NET_TO_HOST_16(sin.sin6_port);
}
return (int)recvLength;
}
int enet_socket_set_select(ENetSocket maxSocket, ENetSocketSet* readSet, ENetSocketSet* writeSet, uint32_t timeout) {
struct timeval timeVal;
timeVal.tv_sec = timeout / 1000;
timeVal.tv_usec = (timeout % 1000) * 1000;
return select(maxSocket + 1, readSet, writeSet, NULL, &timeVal);
}
int enet_socket_wait(ENetSocket socket, uint32_t* condition, uint64_t timeout) {
fd_set readSet, writeSet;
struct timeval timeVal;
int selectCount;
timeVal.tv_sec = timeout / 1000;
timeVal.tv_usec = (timeout % 1000) * 1000;
FD_ZERO(&readSet);
FD_ZERO(&writeSet);
if (*condition & ENET_SOCKET_WAIT_SEND)
FD_SET(socket, &writeSet);
if (*condition & ENET_SOCKET_WAIT_RECEIVE)
FD_SET(socket, &readSet);
selectCount = select(socket + 1, &readSet, &writeSet, NULL, &timeVal);
if (selectCount < 0)
return -1;
*condition = ENET_SOCKET_WAIT_NONE;
if (selectCount == 0)
return 0;
if (FD_ISSET(socket, &writeSet))
*condition |= ENET_SOCKET_WAIT_SEND;
if (FD_ISSET(socket, &readSet))
*condition |= ENET_SOCKET_WAIT_RECEIVE;
return 0;
}
#endif
/*
=======================================================================
Extended functionality
=======================================================================
*/
void* enet_packet_get_data(const ENetPacket* packet) {
return (void*)packet->data;
}
void* enet_packet_get_user_data(const ENetPacket* packet) {
return packet->userData;
}
void enet_packet_set_user_data(ENetPacket* packet, void* userData) {
packet->userData = userData;
}
int enet_packet_get_length(const ENetPacket* packet) {
return packet->dataLength;
}
void enet_packet_set_free_callback(ENetPacket* packet, ENetPacketFreeCallback callback) {
packet->freeCallback = callback;
}
int enet_packet_check_references(const ENetPacket* packet) {
return (int)packet->referenceCount;
}
void enet_packet_dispose(ENetPacket* packet) {
if (packet->referenceCount == 0)
enet_packet_destroy(packet);
}
uint32_t enet_host_get_peers_count(const ENetHost* host) {
return host->connectedPeers;
}
uint32_t enet_host_get_packets_sent(const ENetHost* host) {
return host->totalSentPackets;
}
uint32_t enet_host_get_packets_received(const ENetHost* host) {
return host->totalReceivedPackets;
}
uint32_t enet_host_get_bytes_sent(const ENetHost* host) {
return host->totalSentData;
}
uint32_t enet_host_get_bytes_received(const ENetHost* host) {
return host->totalReceivedData;
}
void enet_host_set_max_duplicate_peers(ENetHost* host, uint16_t number) {
if (number < 1)
number = 1;
if (number > ENET_PROTOCOL_MAXIMUM_PEER_ID)
number = ENET_PROTOCOL_MAXIMUM_PEER_ID;
host->duplicatePeers = number;
}
void enet_host_set_intercept_callback(ENetHost* host, ENetInterceptCallback callback) {
host->interceptCallback = callback;
}
void enet_host_set_checksum_callback(ENetHost* host, ENetChecksumCallback callback) {
host->checksumCallback = callback;
}
uint32_t enet_peer_get_id(const ENetPeer* peer) {
return peer->incomingPeerID;
}
int enet_peer_get_ip(const ENetPeer* peer, char* ip, size_t ipLength) {
return enet_address_get_ip(&peer->address, ip, ipLength);
}
uint16_t enet_peer_get_port(const ENetPeer* peer) {
return peer->address.port;
}
uint32_t enet_peer_get_mtu(const ENetPeer* peer) {
return peer->mtu;
}
ENetPeerState enet_peer_get_state(const ENetPeer* peer) {
return peer->state;
}
uint32_t enet_peer_get_rtt(const ENetPeer* peer) {
return peer->roundTripTime;
}
uint32_t enet_peer_get_last_rtt(const ENetPeer* peer) {
return peer->lastRoundTripTime;
}
uint32_t enet_peer_get_lastsendtime(const ENetPeer* peer) {
return peer->lastSendTime;
}
uint32_t enet_peer_get_lastreceivetime(const ENetPeer* peer) {
return peer->lastReceiveTime;
}
uint64_t enet_peer_get_packets_sent(const ENetPeer* peer) {
return peer->totalPacketsSent;
}
uint64_t enet_peer_get_packets_lost(const ENetPeer* peer) {
return peer->totalPacketsLost;
}
float enet_peer_get_packets_throttle(const ENetPeer* peer) {
return peer->packetThrottle / (float)ENET_PEER_PACKET_THROTTLE_SCALE * 100.0f;
}
uint64_t enet_peer_get_bytes_sent(const ENetPeer* peer) {
return peer->totalDataSent;
}
uint64_t enet_peer_get_bytes_received(const ENetPeer* peer) {
return peer->totalDataReceived;
}
void* enet_peer_get_data(const ENetPeer* peer) {
return (void*)peer->data;
}
void enet_peer_set_data(ENetPeer* peer, const void* data) {
peer->data = (uint32_t*)data;
}
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#endif // ENET_IMPLEMENTATION
#endif // ENET_H