diff options
Diffstat (limited to 'libs/raylib/src/rnet.h')
| -rw-r--r-- | libs/raylib/src/rnet.h | 2060 |
1 files changed, 1948 insertions, 112 deletions
diff --git a/libs/raylib/src/rnet.h b/libs/raylib/src/rnet.h index ef4b90b..21c8361 100644 --- a/libs/raylib/src/rnet.h +++ b/libs/raylib/src/rnet.h @@ -1,9 +1,9 @@ /********************************************************************************************** * -* rnet - Provides cross-platform network defines, macros etc +* rnet - A simple and easy-to-use network module for raylib * -* DEPENDENCIES: -* <limits.h> - Used for cross-platform type specifiers +* FEATURES: +* - Provides a simple and (hopefully) easy to use wrapper around the Berkeley socket API * * INSPIRED BY: * SFML Sockets - https://www.sfml-dev.org/documentation/2.5.1/classsf_1_1Socket.php @@ -12,14 +12,13 @@ * BEEJ - https://beej.us/guide/bgnet/html/single/bgnet.html * Winsock2 - https://docs.microsoft.com/en-us/windows/desktop/api/winsock2 * -* * CONTRIBUTORS: * Jak Barnes (github: @syphonx) (Feb. 2019) - Initial version * * * LICENSE: zlib/libpng * -* Copyright (c) 2019 Jak Barnes (github: @syphonx) and Ramon Santamaria (@raysan5) +* Copyright (c) 2019-2020 Jak Barnes (@syphonx) and Ramon Santamaria (@raysan5) * * This software is provided "as-is", without any express or implied warranty. In no event * will the authors be held liable for any damages arising from the use of this software. @@ -78,15 +77,15 @@ #define NOMSG // typedef MSG and associated routines #define NOOPENFILE // OpenFile(), OemToAnsi, AnsiToOem, and OF_* #define NOSCROLL // SB_* and scrolling routines -#define NOSERVICE // All Service Controller routines, SERVICE_ equates, etc. -#define NOSOUND // Sound driver routines +#define NOSERVICE // All Service Controller routines, SERVICE_ equates, etc. +#define NOSOUND // Sound driver routines #define NOTEXTMETRIC // typedef TEXTMETRIC and associated routines #define NOWH // SetWindowsHook and WH_* #define NOWINOFFSETS // GWL_*, GCL_*, associated routines -#define NOCOMM // COMM driver routines -#define NOKANJI // Kanji support stuff. -#define NOHELP // Help engine interface. -#define NOPROFILER // Profiler interface. +#define NOCOMM // COMM driver routines +#define NOKANJI // Kanji support stuff. +#define NOHELP // Help engine interface. +#define NOPROFILER // Profiler interface. #define NODEFERWINDOWPOS // DeferWindowPos routines #define NOMCX // Modem Configuration Extensions #define MMNOSOUND @@ -135,14 +134,14 @@ typedef int socklen_t; //---------------------------------------------------------------------------------- // Include system network headers -#if defined(_WIN32) +#if defined(_WIN32) // Windows #define __USE_W32_SOCKETS #define WIN32_LEAN_AND_MEAN #include <winsock2.h> #include <ws2tcpip.h> #include <io.h> #define IPTOS_LOWDELAY 0x10 -#else // Unix +#else // Unix #include <sys/types.h> #include <fcntl.h> #include <netinet/in.h> @@ -178,27 +177,34 @@ typedef int socklen_t; //---------------------------------------------------------------------------------- // Network connection related defines -#define SOCKET_MAX_SET_SIZE (32) // Maximum sockets in a set -#define SOCKET_MAX_QUEUE_SIZE (16) // Maximum socket queue size -#define SOCKET_MAX_SOCK_OPTS (4) // Maximum socket options -#define SOCKET_MAX_UDPCHANNELS (32) // Maximum UDP channels -#define SOCKET_MAX_UDPADDRESSES (4) // Maximum bound UDP addresses - +#define SOCKET_MAX_SET_SIZE 32 // Maximum sockets in a set +#define SOCKET_MAX_QUEUE_SIZE 16 // Maximum socket queue size +#define SOCKET_MAX_SOCK_OPTS 4 // Maximum socket options +#define SOCKET_MAX_UDPCHANNELS 32 // Maximum UDP channels +#define SOCKET_MAX_UDPADDRESSES 4 // Maximum bound UDP addresses // Network address related defines -#define ADDRESS_IPV4_ADDRSTRLEN (22) // IPv4 string length -#define ADDRESS_IPV6_ADDRSTRLEN (65) // IPv6 string length -#define ADDRESS_TYPE_ANY (0) // AF_UNSPEC -#define ADDRESS_TYPE_IPV4 (2) // AF_INET -#define ADDRESS_TYPE_IPV6 (23) // AF_INET6 -#define ADDRESS_MAXHOST (1025) // Max size of a fully-qualified domain name -#define ADDRESS_MAXSERV (32) // Max size of a service name +#define ADDRESS_IPV4_ADDRSTRLEN 22 // IPv4 string length +#define ADDRESS_IPV6_ADDRSTRLEN 65 // IPv6 string length +#define ADDRESS_TYPE_ANY 0 // AF_UNSPEC +#define ADDRESS_TYPE_IPV4 2 // AF_INET +#define ADDRESS_TYPE_IPV6 23 // AF_INET6 +#define ADDRESS_MAXHOST 1025 // Max size of a fully-qualified domain name +#define ADDRESS_MAXSERV 32 // Max size of a service name // Network address related defines -#define ADDRESS_ANY ((unsigned long) 0x00000000) -#define ADDRESS_LOOPBACK (0x7f000001) -#define ADDRESS_BROADCAST ((unsigned long) 0xffffffff) -#define ADDRESS_NONE (0xffffffff) +#define ADDRESS_ANY (unsigned long)0x00000000 +#define ADDRESS_LOOPBACK 0x7f000001 +#define ADDRESS_BROADCAST (unsigned long)0xffffffff +#define ADDRESS_NONE 0xffffffff + +// Network resolution related defines +#define NAME_INFO_DEFAULT 0x00 // No flags set +#define NAME_INFO_NOFQDN 0x01 // Only return nodename portion for local hosts +#define NAME_INFO_NUMERICHOST 0x02 // Return numeric form of the host's address +#define NAME_INFO_NAMEREQD 0x04 // Error if the host's name not in DNS +#define NAME_INFO_NUMERICSERV 0x08 // Return numeric form of the service (port #) +#define NAME_INFO_DGRAM 0x10 // Service is a datagram service // Address resolution related defines #if defined(_WIN32) @@ -220,14 +226,6 @@ typedef int socklen_t; #define ADDRESS_INFO_RESOLUTION_HANDLE (0x40000000) // Request resolution handle #endif -// Network resolution related defines -#define NAME_INFO_DEFAULT (0x00) // No flags set -#define NAME_INFO_NOFQDN (0x01) // Only return nodename portion for local hosts -#define NAME_INFO_NUMERICHOST (0x02) // Return numeric form of the host's address -#define NAME_INFO_NAMEREQD (0x04) // Error if the host's name not in DNS -#define NAME_INFO_NUMERICSERV (0x08) // Return numeric form of the service (port #) -#define NAME_INFO_DGRAM (0x10) // Service is a datagram service - //---------------------------------------------------------------------------------- // Types and Structures Definition //---------------------------------------------------------------------------------- @@ -239,6 +237,11 @@ typedef int socklen_t; typedef enum { false, true } bool; #endif +typedef enum { + SOCKET_TCP = 0, // SOCK_STREAM + SOCKET_UDP = 1 // SOCK_DGRAM +} SocketType; + // Network typedefs typedef uint32_t SocketChannel; typedef struct _AddressInformation *AddressInformation; @@ -249,83 +252,79 @@ typedef struct _SocketAddressStorage *SocketAddressStorage; // IPAddress definition (in network byte order) typedef struct IPAddress { - unsigned long host; /* 32-bit IPv4 host address */ - unsigned short port; /* 16-bit protocol port */ + unsigned long host; // 32-bit IPv4 host address + unsigned short port; // 16-bit protocol port } IPAddress; -// An option ID, value, sizeof(value) tuple for setsockopt(2). -typedef struct SocketOpt { - int id; - void *value; - int valueLen; -} SocketOpt; - -typedef enum { - SOCKET_TCP = 0, // SOCK_STREAM - SOCKET_UDP = 1 // SOCK_DGRAM -} SocketType; - typedef struct UDPChannel { - int numbound; // The total number of addresses this channel is bound to + int numbound; // The total number of addresses this channel is bound to IPAddress address[SOCKET_MAX_UDPADDRESSES]; // The list of remote addresses this channel is bound to } UDPChannel; +// An option ID, value, sizeof(value) tuple for setsockopt(2). +typedef struct SocketOpt { + int id; // Socked option id + int valueLen; // Socked option value len + void *value; // Socked option value data +} SocketOpt; + typedef struct Socket { - int ready; // Is the socket ready? i.e. has information - int status; // The last status code to have occured using this socket - bool isServer; // Is this socket a server socket (i.e. TCP/UDP Listen Server) - SocketChannel channel; // The socket handle id - SocketType type; // Is this socket a TCP or UDP socket? - bool isIPv6; // Is this socket address an ipv6 address? + int ready; // Is the socket ready? i.e. has information + int status; // The last status code to have occured using this socket + bool isServer; // Is this socket a server socket (i.e. TCP/UDP Listen Server) + SocketChannel channel; // The socket handle id + SocketType type; // Is this socket a TCP or UDP socket? + + bool isIPv6; // Is this socket address an ipv6 address? SocketAddressIPv4 addripv4; // The host/target IPv4 for this socket (in network byte order) SocketAddressIPv6 addripv6; // The host/target IPv6 for this socket (in network byte order) struct UDPChannel binding[SOCKET_MAX_UDPCHANNELS]; // The amount of channels (if UDP) this socket is bound to } Socket; -typedef struct SocketSet { - int numsockets; - int maxsockets; - struct Socket **sockets; -} SocketSet; +// Configuration for a socket +typedef struct SocketConfig { + SocketType type; // The type of socket, TCP/UDP + char *host; // The host address in xxx.xxx.xxx.xxx form + char *port; // The target port/service in the form "http" or "25565" + bool server; // Listen for incoming clients? + bool nonblocking; // non-blocking operation? + int backlog_size; // set a custom backlog size + SocketOpt sockopts[SOCKET_MAX_SOCK_OPTS]; +} SocketConfig; typedef struct SocketDataPacket { - int channel; // The src/dst channel of the packet - unsigned char *data; // The packet data - int len; // The length of the packet data - int maxlen; // The size of the data buffer - int status; // packet status after sending - IPAddress address; // The source/dest address of an incoming/outgoing packet + IPAddress address; // The source/dest address of an incoming/outgoing packet + int channel; // The src/dst channel of the packet + int maxlen; // The size of the data buffer + int status; // Packet status after sending + unsigned int len; // The length of the packet data + unsigned char *data; // The packet data } SocketDataPacket; -// Configuration for a socket. -typedef struct SocketConfig { - char * host; // The host address in xxx.xxx.xxx.xxx form - char * port; // The target port/service in the form "http" or "25565" - bool server; // Listen for incoming clients? - SocketType type; // The type of socket, TCP/UDP - bool nonblocking; // non-blocking operation? - int backlog_size; // set a custom backlog size - SocketOpt sockopts[SOCKET_MAX_SOCK_OPTS]; -} SocketConfig; - -// Result from calling open with a given config. +// Result from calling open with a given config typedef struct SocketResult { - int status; - Socket *socket; + int status; // Socket result state + Socket *socket; // Socket ref } SocketResult; +typedef struct SocketSet { + int numsockets; // Socket set count + int maxsockets; // Socket set max + struct Socket **sockets; // Sockets array +} SocketSet; + // Packet type typedef struct Packet { - uint32_t size; // The total size of bytes in data - uint32_t offs; // The offset to data access - uint32_t maxs; // The max size of data - uint8_t *data; // Data stored in network byte order + uint32_t size; // The total size of bytes in data + uint32_t offs; // The offset to data access + uint32_t maxs; // The max size of data + uint8_t *data; // Data stored in network byte order } Packet; #ifdef __cplusplus -extern "C" { // Prevents name mangling of functions +extern "C" { // Prevents name mangling of functions #endif //---------------------------------------------------------------------------------- @@ -338,8 +337,8 @@ extern "C" { // Prevents name mangling of functions //---------------------------------------------------------------------------------- // Initialisation and cleanup -bool InitNetwork(void); -void CloseNetwork(void); +bool InitNetworkDevice(void); +void CloseNetworkDevice(void); // Address API void ResolveIP(const char *ip, const char *service, int flags, char *outhost, char *outserv); @@ -347,14 +346,13 @@ int ResolveHost(const char *address, const char *service, int addressType, int f int GetAddressFamily(AddressInformation address); int GetAddressSocketType(AddressInformation address); int GetAddressProtocol(AddressInformation address); -char* GetAddressCanonName(AddressInformation address); -char* GetAddressHostAndPort(AddressInformation address, char *outhost, int *outport); -void PrintAddressInfo(AddressInformation address); +char *GetAddressCanonName(AddressInformation address); +char *GetAddressHostAndPort(AddressInformation address, char *outhost, int *outport); // Address Memory API -AddressInformation AllocAddress(); -void FreeAddress(AddressInformation *addressInfo); -AddressInformation *AllocAddressList(int size); +AddressInformation LoadAddress(void); +void UnloadAddress(AddressInformation *addressInfo); +AddressInformation *LoadAddressList(int size); // Socket API bool SocketCreate(SocketConfig *config, SocketResult *result); @@ -363,6 +361,14 @@ bool SocketListen(SocketConfig *config, SocketResult *result); bool SocketConnect(SocketConfig *config, SocketResult *result); Socket *SocketAccept(Socket *server, SocketConfig *config); +// General Socket API +int SocketSend(Socket *sock, const void *datap, int len); +int SocketReceive(Socket *sock, void *data, int maxlen); +SocketAddressStorage SocketGetPeerAddress(Socket *sock); +char *GetSocketAddressHost(SocketAddressStorage storage); +short GetSocketAddressPort(SocketAddressStorage storage); +void SocketClose(Socket *sock); + // UDP Socket API int SocketSetChannel(Socket *socket, int channel, const IPAddress *address); void SocketUnsetChannel(Socket *socket, int channel); @@ -374,21 +380,13 @@ void FreePacket(SocketDataPacket *packet); SocketDataPacket **AllocPacketList(int count, int size); void FreePacketList(SocketDataPacket **packets); -// General Socket API -int SocketSend(Socket *sock, const void *datap, int len); -int SocketReceive(Socket *sock, void *data, int maxlen); -void SocketClose(Socket *sock); -SocketAddressStorage SocketGetPeerAddress(Socket *sock); -char* GetSocketAddressHost(SocketAddressStorage storage); -short GetSocketAddressPort(SocketAddressStorage storage); - // Socket Memory API -Socket *AllocSocket(); -void FreeSocket(Socket **sock); -SocketResult *AllocSocketResult(); -void FreeSocketResult(SocketResult **result); -SocketSet *AllocSocketSet(int max); -void FreeSocketSet(SocketSet *sockset); +Socket *LoadSocket(void); +void UnloadSocket(Socket **sock); +SocketResult *LoadSocketResult(void); +void UnloadSocketResult(SocketResult **result); +SocketSet *LoadSocketSet(int max); +void UnloadSocketSet(SocketSet *sockset); // Socket I/O API bool IsSocketReady(Socket *sock); @@ -413,4 +411,1842 @@ uint64_t PacketRead64(Packet *packet); } #endif -#endif // RNET_H
\ No newline at end of file +#endif // RNET_H + +/*********************************************************************************** +* +* RNET IMPLEMENTATION +* +************************************************************************************/ + +#if defined(RNET_IMPLEMENTATION) + +#include <assert.h> // Required for: assert() +#include <stdio.h> // Required for: FILE, fopen(), fclose(), fread() +#include <stdlib.h> // Required for: malloc(), free() +#include <string.h> // Required for: strcmp(), strncmp() + +#define NET_DEBUG_ENABLED 1 + +#if defined(SUPPORT_TRACELOG) + #define TRACELOG(level, ...) TraceLog(level, __VA_ARGS__) + + #if defined(SUPPORT_TRACELOG_DEBUG) + #define TRACELOGD(...) TraceLog(LOG_DEBUG, __VA_ARGS__) + #else + #define TRACELOGD(...) (void)0 + #endif +#else + #define TRACELOG(level, ...) (void)0 + #define TRACELOGD(...) (void)0 +#endif + +//---------------------------------------------------------------------------------- +// Types and Structures Definition +//---------------------------------------------------------------------------------- + +typedef struct _SocketAddress +{ + struct sockaddr address; +} _SocketAddress; + +typedef struct _SocketAddressIPv4 +{ + struct sockaddr_in address; +} _SocketAddressIPv4; + +typedef struct _SocketAddressIPv6 +{ + struct sockaddr_in6 address; +} _SocketAddressIPv6; + +typedef struct _SocketAddressStorage +{ + struct sockaddr_storage address; +} _SocketAddressStorage; + +typedef struct _AddressInformation +{ + struct addrinfo addr; +} _AddressInformation; + +//---------------------------------------------------------------------------------- +// Local module Functions Declarations +//---------------------------------------------------------------------------------- +static void PrintSocket(struct sockaddr_storage *addr, const int family, const int socktype, const int protocol); +static const char *SocketAddressToString(struct sockaddr_storage *sockaddr); +static bool IsIPv4Address(const char *ip); +static bool IsIPv6Address(const char *ip); +static void *GetSocketPortPtr(struct sockaddr_storage *sa); +static void *GetSocketAddressPtr(struct sockaddr_storage *sa); +static bool IsSocketValid(Socket *sock); +static void SocketSetLastError(int err); +static int SocketGetLastError(); +static char *SocketGetLastErrorString(); +static char *SocketErrorCodeToString(int err); +static bool SocketSetDefaults(SocketConfig *config); +static bool InitSocket(Socket *sock, struct addrinfo *addr); +static bool CreateSocket(SocketConfig *config, SocketResult *outresult); +static bool SocketSetBlocking(Socket *sock); +static bool SocketSetNonBlocking(Socket *sock); +static bool SocketSetOptions(SocketConfig *config, Socket *sock); +static void SocketSetHints(SocketConfig *config, struct addrinfo *hints); + +//---------------------------------------------------------------------------------- +// Local module Functions Definition +//---------------------------------------------------------------------------------- +// Print socket information +static void PrintSocket(struct sockaddr_storage *addr, const int family, const int socktype, const int protocol) +{ + switch (family) + { + case AF_UNSPEC: TRACELOG(LOG_DEBUG, "\tFamily: Unspecified"); break; + case AF_INET: + { + TRACELOG(LOG_DEBUG, "\tFamily: AF_INET (IPv4)"); + TRACELOG(LOG_INFO, "\t- IPv4 address %s", SocketAddressToString(addr)); + } break; + case AF_INET6: + { + TRACELOG(LOG_DEBUG, "\tFamily: AF_INET6 (IPv6)"); + TRACELOG(LOG_INFO, "\t- IPv6 address %s", SocketAddressToString(addr)); + } break; + case AF_NETBIOS: + { + TRACELOG(LOG_DEBUG, "\tFamily: AF_NETBIOS (NetBIOS)"); + } break; + default: TRACELOG(LOG_DEBUG, "\tFamily: Other %ld", family); break; + } + + TRACELOG(LOG_DEBUG, "\tSocket type:"); + switch (socktype) + { + case 0: TRACELOG(LOG_DEBUG, "\t- Unspecified"); break; + case SOCK_STREAM: TRACELOG(LOG_DEBUG, "\t- SOCK_STREAM (stream)"); break; + case SOCK_DGRAM: TRACELOG(LOG_DEBUG, "\t- SOCK_DGRAM (datagram)"); break; + case SOCK_RAW: TRACELOG(LOG_DEBUG, "\t- SOCK_RAW (raw)"); break; + case SOCK_RDM: TRACELOG(LOG_DEBUG, "\t- SOCK_RDM (reliable message datagram)"); break; + case SOCK_SEQPACKET: TRACELOG(LOG_DEBUG, "\t- SOCK_SEQPACKET (pseudo-stream packet)"); break; + default: TRACELOG(LOG_DEBUG, "\t- Other %ld", socktype); break; + } + + TRACELOG(LOG_DEBUG, "\tProtocol:"); + switch (protocol) + { + case 0: TRACELOG(LOG_DEBUG, "\t- Unspecified"); break; + case IPPROTO_TCP: TRACELOG(LOG_DEBUG, "\t- IPPROTO_TCP (TCP)"); break; + case IPPROTO_UDP: TRACELOG(LOG_DEBUG, "\t- IPPROTO_UDP (UDP)"); break; + default: TRACELOG(LOG_DEBUG, "\t- Other %ld", protocol); break; + } +} + +// Convert network ordered socket address to human readable string (127.0.0.1) +static const char *SocketAddressToString(struct sockaddr_storage *sockaddr) +{ + //static const char* ipv6[INET6_ADDRSTRLEN]; + assert(sockaddr != NULL); + assert(sockaddr->ss_family == AF_INET || sockaddr->ss_family == AF_INET6); + + switch (sockaddr->ss_family) + { + case AF_INET: + { + //struct sockaddr_in *s = ((struct sockaddr_in *)sockaddr); + //return inet_ntop(AF_INET, &s->sin_addr, ipv6, INET_ADDRSTRLEN); // TODO. + } + break; + case AF_INET6: + { + //struct sockaddr_in6 *s = ((struct sockaddr_in6 *)sockaddr); + //return inet_ntop(AF_INET6, &s->sin6_addr, ipv6, INET6_ADDRSTRLEN); // TODO. + } + break; + } + + return NULL; +} + +// Check if the null terminated string ip is a valid IPv4 address +static bool IsIPv4Address(const char *ip) +{ + /* + struct sockaddr_in sa; + int result = inet_pton(AF_INET, ip, &(sa.sin_addr)); // TODO. + return (result != 0); + */ + return false; +} + +// Check if the null terminated string ip is a valid IPv6 address +static bool IsIPv6Address(const char *ip) +{ + /* + struct sockaddr_in6 sa; + int result = inet_pton(AF_INET6, ip, &(sa.sin6_addr)); // TODO. + return result != 0; + */ + return false; +} + +// Return a pointer to the port from the correct address family (IPv4, or IPv6) +static void *GetSocketPortPtr(struct sockaddr_storage *sa) +{ + if (sa->ss_family == AF_INET) + { + return &(((struct sockaddr_in *)sa)->sin_port); + } + + return &(((struct sockaddr_in6 *)sa)->sin6_port); +} + +// Return a pointer to the address from the correct address family (IPv4, or IPv6) +static void *GetSocketAddressPtr(struct sockaddr_storage *sa) +{ + if (sa->ss_family == AF_INET) + { + return &(((struct sockaddr_in *)sa)->sin_addr); + } + + return &(((struct sockaddr_in6 *)sa)->sin6_addr); +} + +// Is the socket in a valid state? +static bool IsSocketValid(Socket *sock) +{ + if (sock != NULL) + { + return (sock->channel != INVALID_SOCKET); + } + + return false; +} + +// Sets the error code that can be retrieved through the WSAGetLastError function. +static void SocketSetLastError(int err) +{ +#if defined(_WIN32) + WSASetLastError(err); +#else + errno = err; +#endif +} + +// Returns the error status for the last Sockets operation that failed +static int SocketGetLastError(void) +{ +#if defined(_WIN32) + return WSAGetLastError(); +#else + return errno; +#endif +} + +// Returns a human-readable string representing the last error message +static char *SocketGetLastErrorString(void) +{ + return SocketErrorCodeToString(SocketGetLastError()); +} + +// Returns a human-readable string representing the error message (err) +static char *SocketErrorCodeToString(int err) +{ +#if defined(_WIN32) + static char gaiStrErrorBuffer[GAI_STRERROR_BUFFER_SIZE]; + TRACELOG(LOG_INFO, gaiStrErrorBuffer, "%s", gai_strerror(err)); + return gaiStrErrorBuffer; +#else + return gai_strerror(err); +#endif +} + +// Set the defaults in the supplied SocketConfig if they're not already set +static bool SocketSetDefaults(SocketConfig *config) +{ + if (config->backlog_size == 0) config->backlog_size = SOCKET_MAX_QUEUE_SIZE; + + return true; +} + +// Create the socket channel +static bool InitSocket(Socket *sckt, struct addrinfo *address) +{ + switch (sckt->type) + { + case SOCKET_TCP: + { + if (address->ai_family == AF_INET) sckt->channel = socket(AF_INET, SOCK_STREAM, 0); + else sckt->channel = socket(AF_INET6, SOCK_STREAM, 0); + } break; + case SOCKET_UDP: + { + if (address->ai_family == AF_INET) sckt->channel = socket(AF_INET, SOCK_DGRAM, 0); + else sckt->channel = socket(AF_INET6, SOCK_DGRAM, 0); + } break; + default: TRACELOG(LOG_WARNING, "Invalid socket type specified."); break; + } + + return IsSocketValid(sckt); +} + +// CreateSocket() - Interally called by CreateSocket() +// +// This here is the bread and butter of the socket API, This function will +// attempt to open a socket, bind and listen to it based on the config passed in +// +// SocketConfig* config - Configuration for which socket to open +// SocketResult* result - The results of this function (if any, including errors) +// +// e.g. +// SocketConfig server_config = { SocketConfig client_config = { +// .host = "127.0.0.1", .host = "127.0.0.1", +// .port = 8080, .port = 8080, +// .server = true, }; +// .nonblocking = true, +// }; +// SocketResult server_res; SocketResult client_res; +static bool CreateSocket(SocketConfig *config, SocketResult *outresult) +{ + bool success = true; + int addrstatus; + struct addrinfo hints; // Address flags (IPV4, IPV6, UDP?) + struct addrinfo *res; // A pointer to the resulting address list + + outresult->socket->channel = INVALID_SOCKET; + outresult->status = RESULT_FAILURE; + + // Set the socket type + outresult->socket->type = config->type; + + // Set the hints based on information in the config + // + // AI_CANONNAME Causes the ai_canonname of the result to the filled out with the host's canonical (real) name. + // AI_PASSIVE: Causes the result's IP address to be filled out with INADDR_ANY (IPv4)or in6addr_any (IPv6); + // Note: This causes a subsequent call to bind() to auto-fill the IP address + // of the struct sockaddr with the address of the current host. + // + SocketSetHints(config, &hints); + + // Populate address information + addrstatus = getaddrinfo(config->host, // e.g. "www.example.com" or IP (Can be null if AI_PASSIVE flag is set + config->port, // e.g. "http" or port number + &hints, // e.g. SOCK_STREAM/SOCK_DGRAM + &res // The struct to populate + ); + + // Did we succeed? + if (addrstatus != 0) + { + outresult->socket->status = SocketGetLastError(); + TRACELOG(LOG_WARNING, "Socket Error: %s", SocketErrorCodeToString(outresult->socket->status)); + SocketSetLastError(0); + TRACELOG(LOG_WARNING, "Failed to get resolve host %s:%s: %s", config->host, config->port, SocketGetLastErrorString()); + + return (success = false); + } + else + { + char hoststr[NI_MAXHOST]; + char portstr[NI_MAXSERV]; + //socklen_t client_len = sizeof(struct sockaddr_storage); + //int rc = getnameinfo((struct sockaddr *)res->ai_addr, client_len, hoststr, sizeof(hoststr), portstr, sizeof(portstr), NI_NUMERICHOST | NI_NUMERICSERV); + TRACELOG(LOG_INFO, "Successfully resolved host %s:%s", hoststr, portstr); + } + + // Walk the address information linked-list + struct addrinfo *it; + for (it = res; it != NULL; it = it->ai_next) + { + // Initialise the socket + if (!InitSocket(outresult->socket, it)) + { + outresult->socket->status = SocketGetLastError(); + TRACELOG(LOG_WARNING, "Socket Error: %s", SocketErrorCodeToString(outresult->socket->status)); + SocketSetLastError(0); + continue; + } + + // Set socket options + if (!SocketSetOptions(config, outresult->socket)) + { + outresult->socket->status = SocketGetLastError(); + TRACELOG(LOG_WARNING, "Socket Error: %s", SocketErrorCodeToString(outresult->socket->status)); + SocketSetLastError(0); + freeaddrinfo(res); + + return (success = false); + } + } + + if (!IsSocketValid(outresult->socket)) + { + outresult->socket->status = SocketGetLastError(); + TRACELOG(LOG_WARNING, "Socket Error: %s", SocketErrorCodeToString(outresult->status)); + SocketSetLastError(0); + freeaddrinfo(res); + + return (success = false); + } + + if (success) + { + outresult->status = RESULT_SUCCESS; + outresult->socket->ready = 0; + outresult->socket->status = 0; + + if (!(config->type == SOCKET_UDP)) outresult->socket->isServer = config->server; + + switch (res->ai_addr->sa_family) + { + case AF_INET: + { + outresult->socket->addripv4 = (struct _SocketAddressIPv4 *)RNET_MALLOC(sizeof(*outresult->socket->addripv4)); + + if (outresult->socket->addripv4 != NULL) + { + memset(outresult->socket->addripv4, 0, sizeof(*outresult->socket->addripv4)); + + if (outresult->socket->addripv4 != NULL) + { + memcpy(&outresult->socket->addripv4->address, (struct sockaddr_in *)res->ai_addr, sizeof(struct sockaddr_in)); + + outresult->socket->isIPv6 = false; + char hoststr[NI_MAXHOST]; + char portstr[NI_MAXSERV]; + + socklen_t client_len = sizeof(struct sockaddr_storage); + getnameinfo((struct sockaddr *)&outresult->socket->addripv4->address, client_len, hoststr, sizeof(hoststr), portstr, sizeof(portstr), NI_NUMERICHOST | NI_NUMERICSERV); + + TRACELOG(LOG_INFO, "Socket address set to %s:%s", hoststr, portstr); + } + } + } break; + case AF_INET6: + { + outresult->socket->addripv6 = (struct _SocketAddressIPv6 *)RNET_MALLOC( + sizeof(*outresult->socket->addripv6)); + if (outresult->socket->addripv6 != NULL) + { + memset(outresult->socket->addripv6, 0, + sizeof(*outresult->socket->addripv6)); + if (outresult->socket->addripv6 != NULL) + { + memcpy(&outresult->socket->addripv6->address, + (struct sockaddr_in6 *)res->ai_addr, sizeof(struct sockaddr_in6)); + outresult->socket->isIPv6 = true; + char hoststr[NI_MAXHOST]; + char portstr[NI_MAXSERV]; + socklen_t client_len = sizeof(struct sockaddr_storage); + getnameinfo( + (struct sockaddr *)&outresult->socket->addripv6->address, client_len, hoststr, sizeof(hoststr), portstr, sizeof(portstr), NI_NUMERICHOST | NI_NUMERICSERV); + TRACELOG(LOG_INFO, "Socket address set to %s:%s", hoststr, portstr); + } + } + } break; + default: break; + } + } + + freeaddrinfo(res); + return success; +} + +// Set the state of the Socket sock to blocking +static bool SocketSetBlocking(Socket *sock) +{ + bool ret = true; +#if defined(_WIN32) + unsigned long mode = 0; + ret = ioctlsocket(sock->channel, FIONBIO, &mode); +#else + const int flags = fcntl(sock->channel, F_GETFL, 0); + if (!(flags & O_NONBLOCK)) + { + TRACELOG(LOG_DEBUG, "Socket was already in blocking mode"); + return ret; + } + + ret = (0 == fcntl(sock->channel, F_SETFL, (flags ^ O_NONBLOCK))); +#endif + return ret; +} + +// Set the state of the Socket sock to non-blocking +static bool SocketSetNonBlocking(Socket *sock) +{ + bool ret = true; +#if defined(_WIN32) + unsigned long mode = 1; + ret = ioctlsocket(sock->channel, FIONBIO, &mode); +#else + const int flags = fcntl(sock->channel, F_GETFL, 0); + + if ((flags & O_NONBLOCK)) + { + TRACELOG(LOG_DEBUG, "Socket was already in non-blocking mode"); + return ret; + } + + ret = (0 == fcntl(sock->channel, F_SETFL, (flags | O_NONBLOCK))); +#endif + return ret; +} + +// Set options specified in SocketConfig to Socket sock +static bool SocketSetOptions(SocketConfig *config, Socket *sock) +{ + for (int i = 0; i < SOCKET_MAX_SOCK_OPTS; i++) + { + SocketOpt *opt = &config->sockopts[i]; + + if (opt->id == 0) break; + + if (setsockopt(sock->channel, SOL_SOCKET, opt->id, opt->value, opt->valueLen) < 0) return false; + } + + return true; +} + +// Set "hints" in an addrinfo struct, to be passed to getaddrinfo. +static void SocketSetHints(SocketConfig *config, struct addrinfo *hints) +{ + if (config == NULL || hints == NULL) return; + + memset(hints, 0, sizeof(*hints)); + + // Check if the ip supplied in the config is a valid ipv4 ip ipv6 address + if (IsIPv4Address(config->host)) + { + hints->ai_family = AF_INET; + hints->ai_flags |= AI_NUMERICHOST; + } + else + { + if (IsIPv6Address(config->host)) + { + hints->ai_family = AF_INET6; + hints->ai_flags |= AI_NUMERICHOST; + } + else hints->ai_family = AF_UNSPEC; + } + + if (config->type == SOCKET_UDP) hints->ai_socktype = SOCK_DGRAM; + else hints->ai_socktype = SOCK_STREAM; + + + // Set passive unless UDP client + if (!(config->type == SOCKET_UDP) || config->server) hints->ai_flags = AI_PASSIVE; +} + +//---------------------------------------------------------------------------------- +// Module implementation +//---------------------------------------------------------------------------------- + +// Initialise the network (requires for windows platforms only) +bool InitNetworkDevice(void) +{ +#if defined(_WIN32) + WORD wVersionRequested; + WSADATA wsaData; + + wVersionRequested = MAKEWORD(2, 2); + int err = WSAStartup(wVersionRequested, &wsaData); + + if (err != 0) + { + TRACELOG(LOG_WARNING, "WinSock failed to initialise."); + return false; + } + else TRACELOG(LOG_INFO, "WinSock initialised."); + + if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) + { + TRACELOG(LOG_WARNING, "WinSock failed to initialise."); + WSACleanup(); + return false; + } + + return true; +#else + return true; +#endif +} + +// Cleanup, and close the network +void CloseNetworkDevice(void) +{ +#if defined(_WIN32) + WSACleanup(); +#endif +} + +// Protocol-independent name resolution from an address to an ANSI host name +// and from a port number to the ANSI service name. +// +// The flags parameter can be used to customize processing of the getnameinfo function +// +// The following flags are available: +// +// NAME_INFO_DEFAULT 0x00 // No flags set +// NAME_INFO_NOFQDN 0x01 // Only return nodename portion for local hosts +// NAME_INFO_NUMERICHOST 0x02 // Return numeric form of the host's address +// NAME_INFO_NAMEREQD 0x04 // Error if the host's name not in DNS +// NAME_INFO_NUMERICSERV 0x08 // Return numeric form of the service (port #) +// NAME_INFO_DGRAM 0x10 // Service is a datagram service +void ResolveIP(const char *ip, const char *port, int flags, char *host, char *serv) +{ + // Variables + int status; // Status value to return (0) is success + struct addrinfo hints; // Address flags (IPV4, IPV6, UDP?) + struct addrinfo *res; // A pointer to the resulting address list + + // Set the hints + memset(&hints, 0, sizeof hints); + hints.ai_family = AF_UNSPEC; // Either IPv4 or IPv6 (AF_INET, AF_INET6) + hints.ai_protocol = 0; // Automatically select correct protocol (IPPROTO_TCP), (IPPROTO_UDP) + + // Populate address information + status = getaddrinfo(ip, // e.g. "www.example.com" or IP + port, // e.g. "http" or port number + &hints, // e.g. SOCK_STREAM/SOCK_DGRAM + &res // The struct to populate + ); + + // Did we succeed? + if (status != 0) TRACELOG(LOG_WARNING, "Failed to get resolve host %s:%s: %s", ip, port, gai_strerror(errno)); + else TRACELOG(LOG_DEBUG, "Resolving... %s::%s", ip, port); + + // Attempt to resolve network byte order ip to hostname + switch (res->ai_family) + { + case AF_INET: + { + status = getnameinfo(&*((struct sockaddr *)res->ai_addr), + sizeof(*((struct sockaddr_in *)res->ai_addr)), + host, NI_MAXHOST, serv, NI_MAXSERV, flags); + } break; + case AF_INET6: + { + /* + status = getnameinfo(&*((struct sockaddr_in6 *)res->ai_addr), // TODO. + sizeof(*((struct sockaddr_in6 *)res->ai_addr)), + host, NI_MAXHOST, serv, NI_MAXSERV, flags); + */ + } break; + default: break; + } + + if (status != 0) TRACELOG(LOG_WARNING, "Failed to resolve ip %s: %s", ip, SocketGetLastErrorString()); + else TRACELOG(LOG_DEBUG, "Successfully resolved %s::%s to %s", ip, port, host); + + // Free the pointer to the data returned by addrinfo + freeaddrinfo(res); +} + +// Protocol-independent translation from an ANSI host name to an address +// +// e.g. +// const char* address = "127.0.0.1" (local address) +// const char* port = "80" +// +// Parameters: +// const char* address - A pointer to a NULL-terminated ANSI string that contains a host (node) name or a numeric host address string. +// const char* service - A pointer to a NULL-terminated ANSI string that contains either a service name or port number represented as a string. +// +// Returns: +// The total amount of addresses found, -1 on error +// +int ResolveHost(const char *address, const char *service, int addressType, int flags, AddressInformation *outAddr) +{ + // Variables + int status; // Status value to return (0) is success + struct addrinfo hints; // Address flags (IPV4, IPV6, UDP?) + struct addrinfo *res; // will point to the results + struct addrinfo *iterator; + assert(((address != NULL || address != 0) || (service != NULL || service != 0))); + assert(((addressType == AF_INET) || (addressType == AF_INET6) || (addressType == AF_UNSPEC))); + + // Set the hints + memset(&hints, 0, sizeof hints); + hints.ai_family = addressType; // Either IPv4 or IPv6 (ADDRESS_TYPE_IPV4, ADDRESS_TYPE_IPV6) + hints.ai_protocol = 0; // Automatically select correct protocol (IPPROTO_TCP), (IPPROTO_UDP) + hints.ai_flags = flags; + assert((hints.ai_addrlen == 0) || (hints.ai_addrlen == 0)); + assert((hints.ai_canonname == 0) || (hints.ai_canonname == 0)); + assert((hints.ai_addr == 0) || (hints.ai_addr == 0)); + assert((hints.ai_next == 0) || (hints.ai_next == 0)); + + // When the address is NULL, populate the IP for me + if (address == NULL) + { + if ((hints.ai_flags & AI_PASSIVE) == 0) hints.ai_flags |= AI_PASSIVE; + } + + TRACELOG(LOG_INFO, "Resolving host..."); + + // Populate address information + status = getaddrinfo(address, // e.g. "www.example.com" or IP + service, // e.g. "http" or port number + &hints, // e.g. SOCK_STREAM/SOCK_DGRAM + &res // The struct to populate + ); + + // Did we succeed? + if (status != 0) + { + int error = SocketGetLastError(); + SocketSetLastError(0); + TRACELOG(LOG_WARNING, "Failed to get resolve host: %s", SocketErrorCodeToString(error)); + return -1; + } + else TRACELOG(LOG_INFO, "Successfully resolved host %s:%s", address, service); + + // Calculate the size of the address information list + int size = 0; + for (iterator = res; iterator != NULL; iterator = iterator->ai_next) size++; + + // Validate the size is > 0, otherwise return + if (size <= 0) + { + TRACELOG(LOG_WARNING, "Error, no addresses found."); + return -1; + } + + // If not address list was allocated, allocate it dynamically with the known address size + if (outAddr == NULL) outAddr = (AddressInformation *)RNET_MALLOC(size * sizeof(AddressInformation)); + + // Dynamically allocate an array of address information structs + if (outAddr != NULL) + { + int i; + for (i = 0; i < size; ++i) + { + outAddr[i] = LoadAddress(); + if (outAddr[i] == NULL) + { + break; + } + } + + outAddr[i] = NULL; + if (i != size) outAddr = NULL; + } + else + { + TRACELOG(LOG_WARNING, "Error, failed to dynamically allocate memory for the address list"); + return -1; + } + + // Copy all the address information from res into outAddrList + int i = 0; + for (iterator = res; iterator != NULL; iterator = iterator->ai_next) + { + if (i < size) + { + outAddr[i]->addr.ai_flags = iterator->ai_flags; + outAddr[i]->addr.ai_family = iterator->ai_family; + outAddr[i]->addr.ai_socktype = iterator->ai_socktype; + outAddr[i]->addr.ai_protocol = iterator->ai_protocol; + outAddr[i]->addr.ai_addrlen = iterator->ai_addrlen; + *outAddr[i]->addr.ai_addr = *iterator->ai_addr; +#if NET_DEBUG_ENABLED + TRACELOG(LOG_DEBUG, "GetAddressInformation"); + TRACELOG(LOG_DEBUG, "\tFlags: 0x%x", iterator->ai_flags); + //PrintSocket(outAddr[i]->addr.ai_addr, outAddr[i]->addr.ai_family, outAddr[i]->addr.ai_socktype, outAddr[i]->addr.ai_protocol); + TRACELOG(LOG_DEBUG, "Length of this sockaddr: %d", outAddr[i]->addr.ai_addrlen); + TRACELOG(LOG_DEBUG, "Canonical name: %s", iterator->ai_canonname); +#endif + i++; + } + } + + // Free the pointer to the data returned by addrinfo + freeaddrinfo(res); + + // Return the total count of addresses found + return size; +} + +// This here is the bread and butter of the socket API, This function will +// attempt to open a socket, bind and listen to it based on the config passed in +// +// SocketConfig* config - Configuration for which socket to open +// SocketResult* result - The results of this function (if any, including errors) +// +// e.g. +// SocketConfig server_config = { SocketConfig client_config = { +// .host = "127.0.0.1", .host = "127.0.0.1", +// .port = 8080, .port = 8080, +// .server = true, }; +// .nonblocking = true, +// }; +// SocketResult server_res; SocketResult client_res; +bool SocketCreate(SocketConfig *config, SocketResult *result) +{ + // Socket creation result + bool success = true; + + // Make sure we've not received a null config or result pointer + if (config == NULL || result == NULL) return (success = false); + + // Set the defaults based on the config + if (!SocketSetDefaults(config)) + { + TRACELOG(LOG_WARNING, "Configuration Error."); + success = false; + } + else + { + // Create the socket + if (CreateSocket(config, result)) + { + if (config->nonblocking) SocketSetNonBlocking(result->socket); + else SocketSetBlocking(result->socket); + } + else success = false; + } + + return success; +} + +// Bind a socket to a local address +// Note: The bind function is required on an unconnected socket before subsequent calls to the listen function. +bool SocketBind(SocketConfig *config, SocketResult *result) +{ + bool success = false; + result->status = RESULT_FAILURE; + struct sockaddr_storage *sock_addr = NULL; + + // Don't bind to a socket that isn't configured as a server + if (!IsSocketValid(result->socket) || !config->server) + { + TRACELOG(LOG_WARNING, Cannot bind to socket marked as \"Client\" in SocketConfig."); + success = false; + } + else + { + if (result->socket->isIPv6) sock_addr = (struct sockaddr_storage *)&result->socket->addripv6->address; + else sock_addr = (struct sockaddr_storage *)&result->socket->addripv4->address; + + if (sock_addr != NULL) + { + if (bind(result->socket->channel, (struct sockaddr *)sock_addr, sizeof(*sock_addr)) != SOCKET_ERROR) + { + TRACELOG(LOG_INFO, "Successfully bound socket."); + success = true; + } + else + { + result->socket->status = SocketGetLastError(); + TRACELOG(LOG_WARNING, "Socket Error: %s", SocketErrorCodeToString(result->socket->status)); + SocketSetLastError(0); + success = false; + } + } + } + + // Was the bind a success? + if (success) + { + result->status = RESULT_SUCCESS; + result->socket->ready = 0; + result->socket->status = 0; + socklen_t sock_len = sizeof(*sock_addr); + + if (getsockname(result->socket->channel, (struct sockaddr *)sock_addr, &sock_len) < 0) + { + TRACELOG(LOG_WARNING, "Couldn't get socket address"); + } + else + { + struct sockaddr_in *s = (struct sockaddr_in *)sock_addr; + // result->socket->address.host = s->sin_addr.s_addr; + // result->socket->address.port = s->sin_port; + + result->socket->addripv4 = (struct _SocketAddressIPv4 *)RNET_MALLOC(sizeof(*result->socket->addripv4)); + + if (result->socket->addripv4 != NULL) memset(result->socket->addripv4, 0, sizeof(*result->socket->addripv4)); + + memcpy(&result->socket->addripv4->address, (struct sockaddr_in *)&s->sin_addr, sizeof(struct sockaddr_in)); + } + } + return success; +} + +// Listens (and queues) incoming connections requests for a bound port. +bool SocketListen(SocketConfig *config, SocketResult *result) +{ + bool success = false; + result->status = RESULT_FAILURE; + + // Don't bind to a socket that isn't configured as a server + if (!IsSocketValid(result->socket) || !config->server) + { + TRACELOG(LOG_WARNING, "Cannot listen on socket marked as \"Client\" in SocketConfig."); + success = false; + } + else + { + // Don't listen on UDP sockets + if (!(config->type == SOCKET_UDP)) + { + if (listen(result->socket->channel, config->backlog_size) != SOCKET_ERROR) + { + TRACELOG(LOG_INFO, "Started listening on socket..."); + success = true; + } + else + { + success = false; + result->socket->status = SocketGetLastError(); + TRACELOG(LOG_WARNING, "Socket Error: %s", SocketErrorCodeToString(result->socket->status)); + SocketSetLastError(0); + } + } + else + { + TRACELOG(LOG_WARNING, "Cannot listen on socket marked as \"UDP\" (datagram) in SocketConfig."); + success = false; + } + } + + // Was the listen a success? + if (success) + { + result->status = RESULT_SUCCESS; + result->socket->ready = 0; + result->socket->status = 0; + } + + return success; +} + +// Connect the socket to the destination specified by "host" and "port" in SocketConfig +bool SocketConnect(SocketConfig *config, SocketResult *result) +{ + bool success = true; + result->status = RESULT_FAILURE; + + // Only bind to sockets marked as server + if (config->server) + { + TRACELOG(LOG_WARNING, "Cannot connect to socket marked as \"Server\" in SocketConfig."); + success = false; + } + else + { + if (IsIPv4Address(config->host)) + { + struct sockaddr_in ip4addr; + ip4addr.sin_family = AF_INET; + unsigned long hport; + hport = strtoul(config->port, NULL, 0); + ip4addr.sin_port = htons(hport); + + // TODO: Changed the code to avoid the usage of inet_pton and inet_ntop replacing them with getnameinfo (that should have a better support on windows). + + //inet_pton(AF_INET, config->host, &ip4addr.sin_addr); + int connect_result = connect(result->socket->channel, (struct sockaddr *)&ip4addr, sizeof(ip4addr)); + + if (connect_result == SOCKET_ERROR) + { + result->socket->status = SocketGetLastError(); + SocketSetLastError(0); + + switch (result->socket->status) + { + case WSAEWOULDBLOCK: success = true; break; + default: + { + TRACELOG(LOG_WARNING, "Socket Error: %s", SocketErrorCodeToString(result->socket->status)); + success = false; + } break; + } + } + else + { + TRACELOG(LOG_INFO, "Successfully connected to socket."); + success = true; + } + } + else + { + if (IsIPv6Address(config->host)) + { + struct sockaddr_in6 ip6addr; + ip6addr.sin6_family = AF_INET6; + unsigned long hport; + hport = strtoul(config->port, NULL, 0); + ip6addr.sin6_port = htons(hport); + //inet_pton(AF_INET6, config->host, &ip6addr.sin6_addr); // TODO. + int connect_result = connect(result->socket->channel, (struct sockaddr *)&ip6addr, sizeof(ip6addr)); + + if (connect_result == SOCKET_ERROR) + { + result->socket->status = SocketGetLastError(); + SocketSetLastError(0); + + switch (result->socket->status) + { + case WSAEWOULDBLOCK: success = true; break; + default: + { + TRACELOG(LOG_WARNING, "Socket Error: %s", SocketErrorCodeToString(result->socket->status)); + success = false; + } break; + } + } + else + { + TRACELOG(LOG_INFO, "Successfully connected to socket."); + success = true; + } + } + } + } + + if (success) + { + result->status = RESULT_SUCCESS; + result->socket->ready = 0; + result->socket->status = 0; + } + + return success; +} + +// Closes an existing socket +// +// SocketChannel socket - The id of the socket to close +void SocketClose(Socket *sock) +{ + if (sock != NULL) + { + if (sock->channel != INVALID_SOCKET) closesocket(sock->channel); + } +} + +// Returns the sockaddress for a specific socket in a generic storage struct +SocketAddressStorage SocketGetPeerAddress(Socket *sock) +{ + // TODO. + /* + if (sock->isServer) return NULL; + if (sock->isIPv6) return sock->addripv6; + else return sock->addripv4; + */ + + return NULL; +} + +// Return the address-type appropriate host portion of a socket address +char *GetSocketAddressHost(SocketAddressStorage storage) +{ + assert(storage->address.ss_family == AF_INET || storage->address.ss_family == AF_INET6); + return SocketAddressToString((struct sockaddr_storage *)storage); +} + +// Return the address-type appropriate port(service) portion of a socket address +short GetSocketAddressPort(SocketAddressStorage storage) +{ + //return ntohs(GetSocketPortPtr(storage)); // TODO. + + return 0; +} + +// The accept function permits an incoming connection attempt on a socket. +// +// SocketChannel listener - The socket to listen for incoming connections on (i.e. server) +// SocketResult* out - The result of this function (if any, including errors) +// +// e.g. +// +// SocketResult connection; +// bool connected = false; +// if (!connected) +// { +// if (SocketAccept(server_res.socket.channel, &connection)) +// { +// connected = true; +// } +// } +Socket *SocketAccept(Socket *server, SocketConfig *config) +{ + if (!server->isServer || server->type == SOCKET_UDP) return NULL; + + struct sockaddr_storage sock_addr; + socklen_t sock_alen; + Socket *sock = LoadSocket(); + server->ready = 0; + sock_alen = sizeof(sock_addr); + sock->channel = accept(server->channel, (struct sockaddr *)&sock_addr, &sock_alen); + + if (sock->channel == INVALID_SOCKET) + { + sock->status = SocketGetLastError(); + TRACELOG(LOG_WARNING, "Socket Error: %s", SocketErrorCodeToString(sock->status)); + SocketSetLastError(0); + SocketClose(sock); + + return NULL; + } + + (config->nonblocking) ? SocketSetNonBlocking(sock) : SocketSetBlocking(sock); + sock->isServer = false; + sock->ready = 0; + sock->type = server->type; + + switch (sock_addr.ss_family) + { + case AF_INET: + { + struct sockaddr_in *s = ((struct sockaddr_in *)&sock_addr); + sock->addripv4 = (struct _SocketAddressIPv4 *)RNET_MALLOC(sizeof(*sock->addripv4)); + + if (sock->addripv4 != NULL) + { + memset(sock->addripv4, 0, sizeof(*sock->addripv4)); + memcpy(&sock->addripv4->address, (struct sockaddr_in *)&s->sin_addr, sizeof(struct sockaddr_in)); + TRACELOG(LOG_INFO, "Server: Got connection from %s::%hu", SocketAddressToString((struct sockaddr_storage *)s), ntohs(sock->addripv4->address.sin_port)); + } + } break; + case AF_INET6: + { + struct sockaddr_in6 *s = ((struct sockaddr_in6 *)&sock_addr); + sock->addripv6 = (struct _SocketAddressIPv6 *)RNET_MALLOC(sizeof(*sock->addripv6)); + + if (sock->addripv6 != NULL) + { + memset(sock->addripv6, 0, sizeof(*sock->addripv6)); + memcpy(&sock->addripv6->address, (struct sockaddr_in6 *)&s->sin6_addr, sizeof(struct sockaddr_in6)); + TRACELOG(LOG_INFO, "Server: Got connection from %s::%hu", SocketAddressToString((struct sockaddr_storage *)s), ntohs(sock->addripv6->address.sin6_port)); + } + } break; + } + + return sock; +} + +// Verify that the channel is in the valid range +static int ValidChannel(int channel) +{ + if ((channel < 0) || (channel >= SOCKET_MAX_UDPCHANNELS)) + { + TRACELOG(LOG_WARNING, "Invalid channel"); + return 0; + } + + return 1; +} + +// Set the socket channel +int SocketSetChannel(Socket *socket, int channel, const IPAddress *address) +{ + struct UDPChannel *binding; + + if (socket == NULL) + { + TRACELOG(LOG_WARNING, "Passed a NULL socket"); + return (-1); + } + + if (channel == -1) + { + for (channel = 0; channel < SOCKET_MAX_UDPCHANNELS; ++channel) + { + binding = &socket->binding[channel]; + if (binding->numbound < SOCKET_MAX_UDPADDRESSES) break; + } + } + else + { + if (!ValidChannel(channel)) return (-1); + + binding = &socket->binding[channel]; + } + + if (binding->numbound == SOCKET_MAX_UDPADDRESSES) + { + TRACELOG(LOG_WARNING, "No room for new addresses"); + return (-1); + } + + binding->address[binding->numbound++] = *address; + + return (channel); +} + +// Remove the socket channel +void SocketUnsetChannel(Socket *socket, int channel) +{ + if ((channel >= 0) && (channel < SOCKET_MAX_UDPCHANNELS)) socket->binding[channel].numbound = 0; +} + +/* Allocate/free a single UDP packet 'size' bytes long. + The new packet is returned, or NULL if the function ran out of memory. + */ +SocketDataPacket *AllocPacket(int size) +{ + SocketDataPacket *packet = (SocketDataPacket *)RNET_MALLOC(sizeof(*packet)); + int error = 1; + + if (packet != NULL) + { + packet->maxlen = size; + packet->data = (uint8_t *)RNET_MALLOC(size); + if (packet->data != NULL) + { + error = 0; + } + } + + if (error) + { + FreePacket(packet); + packet = NULL; + } + + return (packet); +} + +int ResizePacket(SocketDataPacket *packet, int newsize) +{ + uint8_t *newdata = (uint8_t *)RNET_MALLOC(newsize); + + if (newdata != NULL) + { + RNET_FREE(packet->data); + packet->data = newdata; + packet->maxlen = newsize; + } + + return (packet->maxlen); +} + +void FreePacket(SocketDataPacket *packet) +{ + if (packet) + { + RNET_FREE(packet->data); + RNET_FREE(packet); + } +} + +// Allocate/Free a UDP packet vector (array of packets) of 'howmany' packets, each 'size' bytes long. +// A pointer to the packet array is returned, or NULL if the function ran out of memory. +SocketDataPacket **AllocPacketList(int howmany, int size) +{ + SocketDataPacket **packetV = (SocketDataPacket **)RNET_MALLOC((howmany + 1) * sizeof(*packetV)); + + if (packetV != NULL) + { + int i; + for (i = 0; i < howmany; ++i) + { + packetV[i] = AllocPacket(size); + if (packetV[i] == NULL) + { + break; + } + } + packetV[i] = NULL; + + if (i != howmany) + { + FreePacketList(packetV); + packetV = NULL; + } + } + + return (packetV); +} + +void FreePacketList(SocketDataPacket **packetV) +{ + if (packetV) + { + for (int i = 0; packetV[i]; ++i) FreePacket(packetV[i]); + RNET_FREE(packetV); + } +} + +// Send 'len' bytes of 'data' over the non-server socket 'sock' +int SocketSend(Socket *sock, const void *datap, int length) +{ + int sent = 0; + int left = length; + int status = -1; + int numsent = 0; + const unsigned char *data = (const unsigned char *)datap; + + // Server sockets are for accepting connections only + if (sock->isServer) + { + TRACELOG(LOG_WARNING, "Cannot send information on a server socket"); + return -1; + } + + // Which socket are we trying to send data on + switch (sock->type) + { + case SOCKET_TCP: + { + SocketSetLastError(0); + do + { + length = send(sock->channel, (const char *)data, left, 0); + if (length > 0) + { + sent += length; + left -= length; + data += length; + } + } while ((left > 0) && // While we still have bytes left to send + ((length > 0) || // The amount of bytes we actually sent is > 0 + (SocketGetLastError() == WSAEINTR)) // The socket was interupted + ); + + if (length == SOCKET_ERROR) + { + sock->status = SocketGetLastError(); + TRACELOG(LOG_DEBUG, "Socket Error: %s", SocketErrorCodeToString(sock->status)); + SocketSetLastError(0); + } + else TRACELOG(LOG_DEBUG, "Successfully sent \"%s\" (%d bytes)", datap, sent); + + return sent; + } break; + case SOCKET_UDP: + { + SocketSetLastError(0); + + if (sock->isIPv6) status = sendto(sock->channel, (const char *)data, left, 0, (struct sockaddr *)&sock->addripv6->address, sizeof(sock->addripv6->address)); + else status = sendto(sock->channel, (const char *)data, left, 0, (struct sockaddr *)&sock->addripv4->address, sizeof(sock->addripv4->address)); + + if (sent >= 0) + { + sock->status = 0; + ++numsent; + TRACELOG(LOG_DEBUG, "Successfully sent \"%s\" (%d bytes)", datap, status); + } + else + { + sock->status = SocketGetLastError(); + TRACELOG(LOG_DEBUG, "Socket Error: %s", SocketGetLastErrorString(sock->status)); + SocketSetLastError(0); + return 0; + } + + return numsent; + } break; + default: break; + } + + return -1; +} + +// Receive up to 'maxlen' bytes of data over the non-server socket 'sock', +// and store them in the buffer pointed to by 'data'. +// This function returns the actual amount of data received. If the return +// value is less than or equal to zero, then either the remote connection was +// closed, or an unknown socket error occurred. +int SocketReceive(Socket *sock, void *data, int maxlen) +{ + int len = 0; + int numrecv = 0; + int status = 0; + socklen_t sock_len; + struct sockaddr_storage sock_addr; + //char ip[INET6_ADDRSTRLEN]; + + // Server sockets are for accepting connections only + if (sock->isServer && (sock->type == SOCKET_TCP)) + { + sock->status = SocketGetLastError(); + TRACELOG(LOG_DEBUG, "Socket Error: %s", "Server sockets cannot be used to receive data"); + SocketSetLastError(0); + return 0; + } + + // Which socket are we trying to send data on + switch (sock->type) + { + case SOCKET_TCP: + { + SocketSetLastError(0); + do + { + len = recv(sock->channel, (char *)data, maxlen, 0); + } while (SocketGetLastError() == WSAEINTR); + + if (len > 0) + { + // Who sent the packet? + if (sock->type == SOCKET_UDP) + { + //TRACELOG(LOG_DEBUG, "Received data from: %s", inet_ntop(sock_addr.ss_family, GetSocketAddressPtr((struct sockaddr *)&sock_addr), ip, sizeof(ip))); + } + + ((unsigned char *)data)[len] = '\0'; // Add null terminating character to the end of the stream + TRACELOG(LOG_DEBUG, "Received \"%s\" (%d bytes)", data, len); + } + + sock->ready = 0; + return len; + } break; + case SOCKET_UDP: + { + SocketSetLastError(0); + sock_len = sizeof(sock_addr); + status = recvfrom(sock->channel, // The receving channel + data, // A pointer to the data buffer to fill + maxlen, // The max length of the data to fill + 0, // Flags + (struct sockaddr *)&sock_addr, // The address of the recevied data + &sock_len // The length of the received data address + ); + + if (status >= 0) ++numrecv; + else + { + sock->status = SocketGetLastError(); + + switch (sock->status) + { + case WSAEWOULDBLOCK: break; + default: TRACELOG(LOG_WARNING, "Socket Error: %s", SocketErrorCodeToString(sock->status)); break; + } + + SocketSetLastError(0); + return 0; + } + + sock->ready = 0; + return numrecv; + } break; + default: break; + } + + return -1; +} + +// Does the socket have it's 'ready' flag set? +bool IsSocketReady(Socket *sock) +{ + return (sock != NULL) && (sock->ready); +} + +// Check if the socket is considered connected +bool IsSocketConnected(Socket *sock) +{ +#if defined(_WIN32) + FD_SET writefds; + FD_ZERO(&writefds); + FD_SET(sock->channel, &writefds); + struct timeval timeout; + timeout.tv_sec = 1; + timeout.tv_usec = 1000000000UL; + int total = select(0, NULL, &writefds, NULL, &timeout); + + if (total == -1) + { // Error + sock->status = SocketGetLastError(); + TRACELOG(LOG_WARNING, "Socket Error: %s", SocketErrorCodeToString(sock->status)); + SocketSetLastError(0); + } + else if (total == 0) return false; // Timeout + else if (FD_ISSET(sock->channel, &writefds)) return true; + + return false; +#else + return true; +#endif +} + +// Allocate and return a SocketResult struct +SocketResult *LoadSocketResult(void) +{ + struct SocketResult *res = (struct SocketResult *)RNET_MALLOC(sizeof(*res)); + + if (res != NULL) + { + memset(res, 0, sizeof(*res)); + if ((res->socket = LoadSocket()) == NULL) + { + RNET_FREE(res); + res = NULL; + } + } + + return res; +} + +// Free an allocated SocketResult +void UnloadSocketResult(SocketResult **result) +{ + if (*result != NULL) + { + if ((*result)->socket != NULL) UnloadSocket(&((*result)->socket)); + + RNET_FREE(*result); + *result = NULL; + } +} + +// Allocate a Socket +Socket *LoadSocket(void) +{ + struct Socket *sock; + sock = (Socket *)RNET_MALLOC(sizeof(*sock)); + + if (sock != NULL) memset(sock, 0, sizeof(*sock)); + else + { + TRACELOG(LOG_WARNING, "Ran out of memory attempting to allocate a socket"); + SocketClose(sock); + RNET_FREE(sock); + sock = NULL; + } + + return sock; +} + +// Free an allocated Socket +void UnloadSocket(Socket **sock) +{ + if (*sock != NULL) + { + RNET_FREE(*sock); + *sock = NULL; + } +} + +// Allocate a SocketSet +SocketSet *LoadSocketSet(int max) +{ + struct SocketSet *set = (struct SocketSet *)RNET_MALLOC(sizeof(*set)); + + if (set != NULL) + { + set->numsockets = 0; + set->maxsockets = max; + set->sockets = (struct Socket **)RNET_MALLOC(max * sizeof(*set->sockets)); + if (set->sockets != NULL) + { + for (int i = 0; i < max; ++i) set->sockets[i] = NULL; + } + else + { + RNET_FREE(set); + set = NULL; + } + } + + return (set); +} + +// Free an allocated SocketSet +void UnloadSocketSet(SocketSet *set) +{ + if (set) + { + RNET_FREE(set->sockets); + RNET_FREE(set); + } +} + +// Add a Socket "sock" to the SocketSet "set" +int AddSocket(SocketSet *set, Socket *sock) +{ + if (sock != NULL) + { + if (set->numsockets == set->maxsockets) + { + TRACELOG(LOG_DEBUG, "Socket Error: %s", "SocketSet is full"); + SocketSetLastError(0); + return (-1); + } + set->sockets[set->numsockets++] = (struct Socket *)sock; + } + else + { + TRACELOG(LOG_DEBUG, "Socket Error: %s", "Socket was null"); + SocketSetLastError(0); + return (-1); + } + + return (set->numsockets); +} + +// Remove a Socket "sock" to the SocketSet "set" +int RemoveSocket(SocketSet *set, Socket *sock) +{ + if (sock != NULL) + { + int i = 0; + for (i = 0; i < set->numsockets; ++i) + { + if (set->sockets[i] == (struct Socket *)sock) break; + } + + if (i == set->numsockets) + { + TRACELOG(LOG_DEBUG, "Socket Error: %s", "Socket not found"); + SocketSetLastError(0); + return (-1); + } + + --set->numsockets; + for (; i < set->numsockets; ++i) set->sockets[i] = set->sockets[i + 1]; + } + + return (set->numsockets); +} + +// Check the sockets in the socket set for pending information +int CheckSockets(SocketSet *set, unsigned int timeout) +{ + int i; + SOCKET maxfd; + int retval; + struct timeval tv; + fd_set mask; + + /* Find the largest file descriptor */ + maxfd = 0; + for (i = set->numsockets - 1; i >= 0; --i) + { + if (set->sockets[i]->channel > maxfd) + { + maxfd = set->sockets[i]->channel; + } + } + + // Check the file descriptors for available data + do + { + SocketSetLastError(0); + + // Set up the mask of file descriptors + FD_ZERO(&mask); + for (i = set->numsockets - 1; i >= 0; --i) + { + FD_SET(set->sockets[i]->channel, &mask); + } // Set up the timeout + + tv.tv_sec = timeout / 1000; + tv.tv_usec = (timeout % 1000) * 1000; + + /* Look! */ + retval = select(maxfd + 1, &mask, NULL, NULL, &tv); + } while (SocketGetLastError() == WSAEINTR); + + // Mark all file descriptors ready that have data available + if (retval > 0) + { + for (i = set->numsockets - 1; i >= 0; --i) + { + if (FD_ISSET(set->sockets[i]->channel, &mask)) set->sockets[i]->ready = 1; + } + } + + return retval; +} + +// Allocate an AddressInformation +AddressInformation LoadAddress(void) +{ + AddressInformation addressInfo = NULL; + addressInfo = (AddressInformation)RNET_CALLOC(1, sizeof(*addressInfo)); + + if (addressInfo != NULL) + { + addressInfo->addr.ai_addr = (struct sockaddr *)RNET_CALLOC(1, sizeof(struct sockaddr)); + if (addressInfo->addr.ai_addr == NULL) TRACELOG(LOG_WARNING, "Failed to allocate memory for \"struct sockaddr\""); + } + else TRACELOG(LOG_WARNING, "Failed to allocate memory for \"struct AddressInformation\""); + + return addressInfo; +} + +// Free an AddressInformation struct +void UnloadAddress(AddressInformation *addressInfo) +{ + if (*addressInfo != NULL) + { + if ((*addressInfo)->addr.ai_addr != NULL) + { + RNET_FREE((*addressInfo)->addr.ai_addr); + (*addressInfo)->addr.ai_addr = NULL; + } + + RNET_FREE(*addressInfo); + *addressInfo = NULL; + } +} + +// Allocate a list of AddressInformation +AddressInformation *LoadAddressList(int size) +{ + AddressInformation *addr; + addr = (AddressInformation *)RNET_MALLOC(size * sizeof(AddressInformation)); + return addr; +} + +// Opaque datatype accessor addrinfo->ai_family +int GetAddressFamily(AddressInformation address) +{ + return address->addr.ai_family; +} + +// Opaque datatype accessor addrinfo->ai_socktype +int GetAddressSocketType(AddressInformation address) +{ + return address->addr.ai_socktype; +} + +// Opaque datatype accessor addrinfo->ai_protocol +int GetAddressProtocol(AddressInformation address) +{ + return address->addr.ai_protocol; +} + +// Opaque datatype accessor addrinfo->ai_canonname +char *GetAddressCanonName(AddressInformation address) +{ + return address->addr.ai_canonname; +} + +// Opaque datatype accessor addrinfo->ai_addr +char *GetAddressHostAndPort(AddressInformation address, char *outhost, int *outport) +{ + //char *ip[INET6_ADDRSTRLEN]; + char *result = NULL; + struct sockaddr_storage *storage = (struct sockaddr_storage *)address->addr.ai_addr; + + switch (storage->ss_family) + { + case AF_INET: + { + struct sockaddr_in *s = ((struct sockaddr_in *)address->addr.ai_addr); + //result = inet_ntop(AF_INET, &s->sin_addr, ip, INET_ADDRSTRLEN); // TODO. + *outport = ntohs(s->sin_port); + } break; + case AF_INET6: + { + struct sockaddr_in6 *s = ((struct sockaddr_in6 *)address->addr.ai_addr); + //result = inet_ntop(AF_INET6, &s->sin6_addr, ip, INET6_ADDRSTRLEN); // TODO. + *outport = ntohs(s->sin6_port); + } break; + default: break; + } + + if (result == NULL) + { + TRACELOG(LOG_WARNING, "Socket Error: %s", SocketErrorCodeToString(SocketGetLastError())); + SocketSetLastError(0); + } + else + { + strcpy(outhost, result); + } + return result; +} + +// +void PacketSend(Packet *packet) +{ + TRACELOG(LOG_INFO, "Sending packet (%s) with size %d\n", packet->data, packet->size); +} + +// +void PacketReceive(Packet *packet) +{ + TRACELOG(LOG_INFO, "Receiving packet (%s) with size %d\n", packet->data, packet->size); +} + +// +void PacketWrite16(Packet *packet, uint16_t value) +{ + TRACELOG(LOG_INFO, "Original: 0x%04" PRIX16 " - %" PRIu16 "\n", value, value); + uint8_t *data = packet->data + packet->offs; + *data++ = (uint8_t)(value >> 8); + *data++ = (uint8_t)(value); + packet->size += sizeof(uint16_t); + packet->offs += sizeof(uint16_t); + TRACELOG(LOG_INFO, "Network: 0x%04" PRIX16 " - %" PRIu16 "\n", (uint16_t) *data, (uint16_t) *data); +} + +// +void PacketWrite32(Packet *packet, uint32_t value) +{ + TRACELOG(LOG_INFO, "Original: 0x%08" PRIX32 " - %" PRIu32 "\n", value, value); + uint8_t *data = packet->data + packet->offs; + *data++ = (uint8_t)(value >> 24); + *data++ = (uint8_t)(value >> 16); + *data++ = (uint8_t)(value >> 8); + *data++ = (uint8_t)(value); + packet->size += sizeof(uint32_t); + packet->offs += sizeof(uint32_t); + + TRACELOG(LOG_INFO, "Network: 0x%08" PRIX32 " - %" PRIu32 "\n", + (uint32_t)(((intptr_t) packet->data) - packet->offs), + (uint32_t)(((intptr_t) packet->data) - packet->offs)); +} + +// +void PacketWrite64(Packet *packet, uint64_t value) +{ + TRACELOG(LOG_INFO, "Original: 0x%016" PRIX64 " - %" PRIu64 "\n", value, value); + + uint8_t *data = packet->data + packet->offs; + *data++ = (uint8_t)(value >> 56); + *data++ = (uint8_t)(value >> 48); + *data++ = (uint8_t)(value >> 40); + *data++ = (uint8_t)(value >> 32); + *data++ = (uint8_t)(value >> 24); + *data++ = (uint8_t)(value >> 16); + *data++ = (uint8_t)(value >> 8); + *data++ = (uint8_t)(value); + packet->size += sizeof(uint64_t); + packet->offs += sizeof(uint64_t); + + TRACELOG(LOG_INFO, "Network: 0x%016" PRIX64 " - %" PRIu64 "\n", (uint64_t)(packet->data - packet->offs), (uint64_t)(packet->data - packet->offs)); +} + +// +uint16_t PacketRead16(Packet *packet) +{ + uint8_t *data = packet->data + packet->offs; + packet->size += sizeof(uint16_t); + packet->offs += sizeof(uint16_t); + uint16_t value = ((uint16_t) data[0] << 8) | data[1]; + TRACELOG(LOG_INFO, "Original: 0x%04" PRIX16 " - %" PRIu16 "\n", value, value); + + return value; +} + +// +uint32_t PacketRead32(Packet *packet) +{ + uint8_t *data = packet->data + packet->offs; + packet->size += sizeof(uint32_t); + packet->offs += sizeof(uint32_t); + uint32_t value = ((uint32_t) data[0] << 24) | ((uint32_t) data[1] << 16) | ((uint32_t) data[2] << 8) | data[3]; + TRACELOG(LOG_INFO, "Original: 0x%08" PRIX32 " - %" PRIu32 "\n", value, value); + + return value; +} + +// +uint64_t PacketRead64(Packet *packet) +{ + uint8_t *data = packet->data + packet->offs; + packet->size += sizeof(uint64_t); + packet->offs += sizeof(uint64_t); + uint64_t value = ((uint64_t) data[0] << 56) | ((uint64_t) data[1] << 48) | ((uint64_t) data[2] << 40) | ((uint64_t) data[3] << 32) | ((uint64_t) data[4] << 24) | ((uint64_t) data[5] << 16) | ((uint64_t) data[6] << 8) | data[7]; + TRACELOG(LOG_INFO, "Original: 0x%016" PRIX64 " - %" PRIu64 "\n", value, value); + + return value; +} + +#endif // RNET_IMPLEMENTATION
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