From d2087be9acc5a01921d7c0e293ff497f28ca04ea Mon Sep 17 00:00:00 2001 From: Kayne Ruse Date: Fri, 17 May 2013 21:05:50 +1000 Subject: [PATCH] Resurrected SDL_net --- README.md | 1 + client/makefile | 2 +- docs/networking outline.txt | 14 +- libs/SDL_net/SDL_net.h | 452 ++++++++++++++++++++++++++++++ libs/SDL_net/SDLnet.c | 269 ++++++++++++++++++ libs/SDL_net/SDLnetTCP.c | 295 ++++++++++++++++++++ libs/SDL_net/SDLnetUDP.c | 528 ++++++++++++++++++++++++++++++++++++ libs/SDL_net/SDLnetselect.c | 163 +++++++++++ libs/SDL_net/SDLnetsys.h | 94 +++++++ server/makefile | 2 +- 10 files changed, 1817 insertions(+), 3 deletions(-) create mode 100644 libs/SDL_net/SDL_net.h create mode 100644 libs/SDL_net/SDLnet.c create mode 100644 libs/SDL_net/SDLnetTCP.c create mode 100644 libs/SDL_net/SDLnetUDP.c create mode 100644 libs/SDL_net/SDLnetselect.c create mode 100644 libs/SDL_net/SDLnetsys.h diff --git a/README.md b/README.md index 6bfcaae..57f079b 100644 --- a/README.md +++ b/README.md @@ -3,6 +3,7 @@ Tortuga is a 3/4 top down multiplayer RPG set in a large archipelago occupied by ## Libraries * [SDL](http://www.libsdl.org/) - Simple DirectMedia Layer API +* [SDL_net](http://www.libsdl.org/projects/SDL_net/) - SDL's networking extension; source included under libs/SDL_net * [Codebase](https://github.com/Ratstail91/Codebase) - files included locally; modifications will be included upstream further into this project. ## Instructions diff --git a/client/makefile b/client/makefile index 877c63b..8e1c861 100644 --- a/client/makefile +++ b/client/makefile @@ -1,6 +1,6 @@ #config CXXFLAGS+=-std=c++11 -DDEBUG -LIB=-lmingw32 -lSDLmain -lSDL -lwsock32 -lWS2_32 +LIB=-lmingw32 -lSDL_net -lSDLmain -lSDL -lwsock32 -liphlpapi #source SRC=$(filter-out unit.cpp, $(wildcard *.cpp)) diff --git a/docs/networking outline.txt b/docs/networking outline.txt index 828ce31..9c53a41 100644 --- a/docs/networking outline.txt +++ b/docs/networking outline.txt @@ -13,4 +13,16 @@ When the player enters the lobby, they can choose what server to connect to. Whe This is controlled through the config files for now. -using ';' delimited commands, how can I get it to work? \ No newline at end of file +using ';' delimited commands, how can I get it to work? + +------------------------- + +UDPNetworkManager: //don't worry at this stage + Open(port) + Close() + + Send(ip, port) + Receive() + + GetOutData() + GetInData() \ No newline at end of file diff --git a/libs/SDL_net/SDL_net.h b/libs/SDL_net/SDL_net.h new file mode 100644 index 0000000..9a0dad8 --- /dev/null +++ b/libs/SDL_net/SDL_net.h @@ -0,0 +1,452 @@ +/* + SDL_net: An example cross-platform network library for use with SDL + Copyright (C) 1997-2012 Sam Lantinga + + 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. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ + +/* $Id$ */ + +#ifndef _SDL_NET_H +#define _SDL_NET_H + +#include "SDL.h" +#include "SDL_endian.h" +#include "SDL_version.h" +#include "begin_code.h" + + + +/* Set up for C function definitions, even when using C++ */ +#ifdef __cplusplus +extern "C" { +#endif + +/* Printable format: "%d.%d.%d", MAJOR, MINOR, PATCHLEVEL +*/ +#define SDL_NET_MAJOR_VERSION 1 +#define SDL_NET_MINOR_VERSION 2 +#define SDL_NET_PATCHLEVEL 8 + +/* This macro can be used to fill a version structure with the compile-time + * version of the SDL_net library. + */ +#define SDL_NET_VERSION(X) \ +{ \ + (X)->major = SDL_NET_MAJOR_VERSION; \ + (X)->minor = SDL_NET_MINOR_VERSION; \ + (X)->patch = SDL_NET_PATCHLEVEL; \ +} + +/* This function gets the version of the dynamically linked SDL_net library. + it should NOT be used to fill a version structure, instead you should + use the SDL_NET_VERSION() macro. + */ +extern DECLSPEC const SDL_version * SDLCALL SDLNet_Linked_Version(void); + +/* Initialize/Cleanup the network API + SDL must be initialized before calls to functions in this library, + because this library uses utility functions from the SDL library. +*/ +extern DECLSPEC int SDLCALL SDLNet_Init(void); +extern DECLSPEC void SDLCALL SDLNet_Quit(void); + +/***********************************************************************/ +/* IPv4 hostname resolution API */ +/***********************************************************************/ + +typedef struct { + Uint32 host; /* 32-bit IPv4 host address */ + Uint16 port; /* 16-bit protocol port */ +} IPaddress; + +/* Resolve a host name and port to an IP address in network form. + If the function succeeds, it will return 0. + If the host couldn't be resolved, the host portion of the returned + address will be INADDR_NONE, and the function will return -1. + If 'host' is NULL, the resolved host will be set to INADDR_ANY. + */ +#ifndef INADDR_ANY +#define INADDR_ANY 0x00000000 +#endif +#ifndef INADDR_NONE +#define INADDR_NONE 0xFFFFFFFF +#endif +#ifndef INADDR_LOOPBACK +#define INADDR_LOOPBACK 0x7f000001 +#endif +#ifndef INADDR_BROADCAST +#define INADDR_BROADCAST 0xFFFFFFFF +#endif +extern DECLSPEC int SDLCALL SDLNet_ResolveHost(IPaddress *address, const char *host, Uint16 port); + +/* Resolve an ip address to a host name in canonical form. + If the ip couldn't be resolved, this function returns NULL, + otherwise a pointer to a static buffer containing the hostname + is returned. Note that this function is not thread-safe. +*/ +extern DECLSPEC const char * SDLCALL SDLNet_ResolveIP(const IPaddress *ip); + +/* Get the addresses of network interfaces on this system. + This returns the number of addresses saved in 'addresses' + */ +extern DECLSPEC int SDLCALL SDLNet_GetLocalAddresses(IPaddress *addresses, int maxcount); + +/***********************************************************************/ +/* TCP network API */ +/***********************************************************************/ + +typedef struct _TCPsocket *TCPsocket; + +/* Open a TCP network socket + If ip.host is INADDR_NONE or INADDR_ANY, this creates a local server + socket on the given port, otherwise a TCP connection to the remote + host and port is attempted. The address passed in should already be + swapped to network byte order (addresses returned from + SDLNet_ResolveHost() are already in the correct form). + The newly created socket is returned, or NULL if there was an error. +*/ +extern DECLSPEC TCPsocket SDLCALL SDLNet_TCP_Open(IPaddress *ip); + +/* Accept an incoming connection on the given server socket. + The newly created socket is returned, or NULL if there was an error. +*/ +extern DECLSPEC TCPsocket SDLCALL SDLNet_TCP_Accept(TCPsocket server); + +/* Get the IP address of the remote system associated with the socket. + If the socket is a server socket, this function returns NULL. +*/ +extern DECLSPEC IPaddress * SDLCALL SDLNet_TCP_GetPeerAddress(TCPsocket sock); + +/* Send 'len' bytes of 'data' over the non-server socket 'sock' + This function returns the actual amount of data sent. If the return value + is less than the amount of data sent, then either the remote connection was + closed, or an unknown socket error occurred. +*/ +extern DECLSPEC int SDLCALL SDLNet_TCP_Send(TCPsocket sock, const void *data, + int len); + +/* 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. +*/ +extern DECLSPEC int SDLCALL SDLNet_TCP_Recv(TCPsocket sock, void *data, int maxlen); + +/* Close a TCP network socket */ +extern DECLSPEC void SDLCALL SDLNet_TCP_Close(TCPsocket sock); + + +/***********************************************************************/ +/* UDP network API */ +/***********************************************************************/ + +/* The maximum channels on a a UDP socket */ +#define SDLNET_MAX_UDPCHANNELS 32 +/* The maximum addresses bound to a single UDP socket channel */ +#define SDLNET_MAX_UDPADDRESSES 4 + +typedef struct _UDPsocket *UDPsocket; +typedef struct { + int channel; /* The src/dst channel of the packet */ + Uint8 *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 */ +} UDPpacket; + +/* Allocate/resize/free a single UDP packet 'size' bytes long. + The new packet is returned, or NULL if the function ran out of memory. + */ +extern DECLSPEC UDPpacket * SDLCALL SDLNet_AllocPacket(int size); +extern DECLSPEC int SDLCALL SDLNet_ResizePacket(UDPpacket *packet, int newsize); +extern DECLSPEC void SDLCALL SDLNet_FreePacket(UDPpacket *packet); + +/* Allocate/Free a UDP packet vector (array of packets) of 'howmany' packets, + each 'size' bytes long. + A pointer to the first packet in the array is returned, or NULL if the + function ran out of memory. + */ +extern DECLSPEC UDPpacket ** SDLCALL SDLNet_AllocPacketV(int howmany, int size); +extern DECLSPEC void SDLCALL SDLNet_FreePacketV(UDPpacket **packetV); + + +/* Open a UDP network socket + If 'port' is non-zero, the UDP socket is bound to a local port. + The 'port' should be given in native byte order, but is used + internally in network (big endian) byte order, in addresses, etc. + This allows other systems to send to this socket via a known port. +*/ +extern DECLSPEC UDPsocket SDLCALL SDLNet_UDP_Open(Uint16 port); + +/* Set the percentage of simulated packet loss for packets sent on the socket. +*/ +extern DECLSPEC void SDLCALL SDLNet_UDP_SetPacketLoss(UDPsocket sock, int percent); + +/* Bind the address 'address' to the requested channel on the UDP socket. + If the channel is -1, then the first unbound channel will be bound with + the given address as it's primary address. + If the channel is already bound, this new address will be added to the + list of valid source addresses for packets arriving on the channel. + If the channel is not already bound, then the address becomes the primary + address, to which all outbound packets on the channel are sent. + This function returns the channel which was bound, or -1 on error. +*/ +extern DECLSPEC int SDLCALL SDLNet_UDP_Bind(UDPsocket sock, int channel, const IPaddress *address); + +/* Unbind all addresses from the given channel */ +extern DECLSPEC void SDLCALL SDLNet_UDP_Unbind(UDPsocket sock, int channel); + +/* Get the primary IP address of the remote system associated with the + socket and channel. If the channel is -1, then the primary IP port + of the UDP socket is returned -- this is only meaningful for sockets + opened with a specific port. + If the channel is not bound and not -1, this function returns NULL. + */ +extern DECLSPEC IPaddress * SDLCALL SDLNet_UDP_GetPeerAddress(UDPsocket sock, int channel); + +/* Send a vector of packets to the the channels specified within the packet. + If the channel specified in the packet is -1, the packet will be sent to + the address in the 'src' member of the packet. + Each packet will be updated with the status of the packet after it has + been sent, -1 if the packet send failed. + This function returns the number of packets sent. +*/ +extern DECLSPEC int SDLCALL SDLNet_UDP_SendV(UDPsocket sock, UDPpacket **packets, int npackets); + +/* Send a single packet to the specified channel. + If the channel specified in the packet is -1, the packet will be sent to + the address in the 'src' member of the packet. + The packet will be updated with the status of the packet after it has + been sent. + This function returns 1 if the packet was sent, or 0 on error. + + NOTE: + The maximum size of the packet is limited by the MTU (Maximum Transfer Unit) + of the transport medium. It can be as low as 250 bytes for some PPP links, + and as high as 1500 bytes for ethernet. +*/ +extern DECLSPEC int SDLCALL SDLNet_UDP_Send(UDPsocket sock, int channel, UDPpacket *packet); + +/* Receive a vector of pending packets from the UDP socket. + The returned packets contain the source address and the channel they arrived + on. If they did not arrive on a bound channel, the the channel will be set + to -1. + The channels are checked in highest to lowest order, so if an address is + bound to multiple channels, the highest channel with the source address + bound will be returned. + This function returns the number of packets read from the network, or -1 + on error. This function does not block, so can return 0 packets pending. +*/ +extern DECLSPEC int SDLCALL SDLNet_UDP_RecvV(UDPsocket sock, UDPpacket **packets); + +/* Receive a single packet from the UDP socket. + The returned packet contains the source address and the channel it arrived + on. If it did not arrive on a bound channel, the the channel will be set + to -1. + The channels are checked in highest to lowest order, so if an address is + bound to multiple channels, the highest channel with the source address + bound will be returned. + This function returns the number of packets read from the network, or -1 + on error. This function does not block, so can return 0 packets pending. +*/ +extern DECLSPEC int SDLCALL SDLNet_UDP_Recv(UDPsocket sock, UDPpacket *packet); + +/* Close a UDP network socket */ +extern DECLSPEC void SDLCALL SDLNet_UDP_Close(UDPsocket sock); + + +/***********************************************************************/ +/* Hooks for checking sockets for available data */ +/***********************************************************************/ + +typedef struct _SDLNet_SocketSet *SDLNet_SocketSet; + +/* Any network socket can be safely cast to this socket type */ +typedef struct _SDLNet_GenericSocket { + int ready; +} *SDLNet_GenericSocket; + +/* Allocate a socket set for use with SDLNet_CheckSockets() + This returns a socket set for up to 'maxsockets' sockets, or NULL if + the function ran out of memory. + */ +extern DECLSPEC SDLNet_SocketSet SDLCALL SDLNet_AllocSocketSet(int maxsockets); + +/* Add a socket to a set of sockets to be checked for available data */ +#define SDLNet_TCP_AddSocket(set, sock) \ + SDLNet_AddSocket(set, SDL_reinterpret_cast(SDLNet_GenericSocket, sock)) +#define SDLNet_UDP_AddSocket(set, sock) \ + SDLNet_AddSocket(set, SDL_reinterpret_cast(SDLNet_GenericSocket, sock)) +extern DECLSPEC int SDLCALL SDLNet_AddSocket(SDLNet_SocketSet set, SDLNet_GenericSocket sock); + +/* Remove a socket from a set of sockets to be checked for available data */ +#define SDLNet_TCP_DelSocket(set, sock) \ + SDLNet_DelSocket(set, SDL_reinterpret_cast(SDLNet_GenericSocket, sock)) +#define SDLNet_UDP_DelSocket(set, sock) \ + SDLNet_DelSocket(set, SDL_reinterpret_cast(SDLNet_GenericSocket, sock)) +extern DECLSPEC int SDLCALL SDLNet_DelSocket(SDLNet_SocketSet set, SDLNet_GenericSocket sock); + +/* This function checks to see if data is available for reading on the + given set of sockets. If 'timeout' is 0, it performs a quick poll, + otherwise the function returns when either data is available for + reading, or the timeout in milliseconds has elapsed, which ever occurs + first. This function returns the number of sockets ready for reading, + or -1 if there was an error with the select() system call. +*/ +extern DECLSPEC int SDLCALL SDLNet_CheckSockets(SDLNet_SocketSet set, Uint32 timeout); + +/* After calling SDLNet_CheckSockets(), you can use this function on a + socket that was in the socket set, to find out if data is available + for reading. +*/ +#define SDLNet_SocketReady(sock) \ + ((sock != NULL) && SDL_reinterpret_cast(SDLNet_GenericSocket, sock)->ready) + +/* Free a set of sockets allocated by SDL_NetAllocSocketSet() */ +extern DECLSPEC void SDLCALL SDLNet_FreeSocketSet(SDLNet_SocketSet set); + + +/***********************************************************************/ +/* Platform-independent data conversion functions */ +/***********************************************************************/ + +/* Write a 16/32 bit value to network packet buffer */ +extern DECLSPEC void SDLCALL SDLNet_Write16(Uint16 value, void *area); +extern DECLSPEC void SDLCALL SDLNet_Write32(Uint32 value, void *area); + +/* Read a 16/32 bit value from network packet buffer */ +extern DECLSPEC Uint16 SDLCALL SDLNet_Read16(void *area); +extern DECLSPEC Uint32 SDLCALL SDLNet_Read32(void *area); + +/***********************************************************************/ +/* Error reporting functions */ +/***********************************************************************/ + +/* We'll use SDL's functions for error reporting */ +#define SDLNet_SetError SDL_SetError +#define SDLNet_GetError SDL_GetError + +/* I'm eventually going to try to disentangle SDL_net from SDL, thus making + SDL_net an independent X-platform networking toolkit. Not today though.... + +extern no_parse_DECLSPEC void SDLCALL SDLNet_SetError(const char *fmt, ...); +extern no_parse_DECLSPEC char * SDLCALL SDLNet_GetError(void); +*/ + + +/* Inline macro functions to read/write network data */ + +/* Warning, some systems have data access alignment restrictions */ +#if defined(sparc) || defined(mips) +#define SDL_DATA_ALIGNED 1 +#endif +#ifndef SDL_DATA_ALIGNED +#define SDL_DATA_ALIGNED 0 +#endif + +/* Write a 16 bit value to network packet buffer */ +#if !SDL_DATA_ALIGNED +#define SDLNet_Write16(value, areap) \ + (*SDL_reinterpret_cast(Uint16 *, areap) = SDL_SwapBE16(value)) +#else +#if SDL_BYTEORDER == SDL_BIG_ENDIAN +#define SDLNet_Write16(value, areap) \ +do \ +{ \ + Uint8 *area = SDL_reinterpret_cast(Uint8 *, areap); \ + area[0] = (value >> 8) & 0xFF; \ + area[1] = value & 0xFF; \ +} while ( 0 ) +#else +#define SDLNet_Write16(value, areap) \ +do \ +{ \ + Uint8 *area = SDL_reinterpret_cast(Uint8 *, areap); \ + area[1] = (value >> 8) & 0xFF; \ + area[0] = value & 0xFF; \ +} while ( 0 ) +#endif +#endif /* !SDL_DATA_ALIGNED */ + +/* Write a 32 bit value to network packet buffer */ +#if !SDL_DATA_ALIGNED +#define SDLNet_Write32(value, areap) \ + *SDL_reinterpret_cast(Uint32 *, areap) = SDL_SwapBE32(value); +#else +#if SDL_BYTEORDER == SDL_BIG_ENDIAN +#define SDLNet_Write32(value, areap) \ +do \ +{ \ + Uint8 *area = SDL_reinterpret_cast(Uint8 *, areap); \ + area[0] = (value >> 24) & 0xFF; \ + area[1] = (value >> 16) & 0xFF; \ + area[2] = (value >> 8) & 0xFF; \ + area[3] = value & 0xFF; \ +} while ( 0 ) +#else +#define SDLNet_Write32(value, areap) \ +do \ +{ \ + Uint8 *area = SDL_reinterpret_cast(Uint8 *, areap); \ + area[3] = (value >> 24) & 0xFF; \ + area[2] = (value >> 16) & 0xFF; \ + area[1] = (value >> 8) & 0xFF; \ + area[0] = value & 0xFF; \ +} while ( 0 ) +#endif +#endif /* !SDL_DATA_ALIGNED */ + +/* Read a 16 bit value from network packet buffer */ +#if !SDL_DATA_ALIGNED +#define SDLNet_Read16(areap) \ + (SDL_SwapBE16(*SDL_reinterpret_cast(Uint16 *, areap))) +#else +#if SDL_BYTEORDER == SDL_BIG_ENDIAN +#define SDLNet_Read16(areap) \ + (((SDL_reinterpret_cast(Uint8 *, areap))[0] << 8) | (SDL_reinterpret_cast(Uint8 *, areap))[1] << 0) +#else +#define SDLNet_Read16(areap) \ + (((SDL_reinterpret_cast(Uint8 *, areap))[1] << 8) | (SDL_reinterpret_cast(Uint8 *, areap))[0] << 0) +#endif +#endif /* !SDL_DATA_ALIGNED */ + +/* Read a 32 bit value from network packet buffer */ +#if !SDL_DATA_ALIGNED +#define SDLNet_Read32(areap) \ + (SDL_SwapBE32(*SDL_reinterpret_cast(Uint32 *, areap))) +#else +#if SDL_BYTEORDER == SDL_BIG_ENDIAN +#define SDLNet_Read32(areap) \ + (((SDL_reinterpret_cast(Uint8 *, areap))[0] << 24) | ((SDL_reinterpret_cast(Uint8 *, areap))[1] << 16) | \ + ((SDL_reinterpret_cast(Uint8 *, areap))[2] << 8) | (SDL_reinterpret_cast(Uint8 *, areap))[3] << 0) +#else +#define SDLNet_Read32(areap) \ + (((SDL_reinterpret_cast(Uint8 *, areap))[3] << 24) | ((SDL_reinterpret_cast(Uint8 *, areap))[2] << 16) | \ + ((SDL_reinterpret_cast(Uint8 *, areap))[1] << 8) | (SDL_reinterpret_cast(Uint8 *, areap))[0] << 0) +#endif +#endif /* !SDL_DATA_ALIGNED */ + +/* Ends C function definitions when using C++ */ +#ifdef __cplusplus +} +#endif +#include "close_code.h" + +#endif /* _SDL_NET_H */ diff --git a/libs/SDL_net/SDLnet.c b/libs/SDL_net/SDLnet.c new file mode 100644 index 0000000..a081f70 --- /dev/null +++ b/libs/SDL_net/SDLnet.c @@ -0,0 +1,269 @@ +/* + SDL_net: An example cross-platform network library for use with SDL + Copyright (C) 1997-2012 Sam Lantinga + + 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. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ + +/* $Id$ */ + +#include + +#include "SDL_endian.h" + +#include "SDLnetsys.h" +#include "SDL_net.h" + + +const SDL_version *SDLNet_Linked_Version(void) +{ + static SDL_version linked_version; + SDL_NET_VERSION(&linked_version); + return(&linked_version); +} + +/* Since the UNIX/Win32/BeOS code is so different from MacOS, + we'll just have two completely different sections here. +*/ +static int SDLNet_started = 0; + +#ifndef __USE_W32_SOCKETS +#include +#endif + +#ifndef __USE_W32_SOCKETS + +int SDLNet_GetLastError(void) +{ + return errno; +} + +void SDLNet_SetLastError(int err) +{ + errno = err; +} + +#endif + +/* Initialize/Cleanup the network API */ +int SDLNet_Init(void) +{ + if ( !SDLNet_started ) { +#ifdef __USE_W32_SOCKETS + /* Start up the windows networking */ + WORD version_wanted = MAKEWORD(1,1); + WSADATA wsaData; + + if ( WSAStartup(version_wanted, &wsaData) != 0 ) { + SDLNet_SetError("Couldn't initialize Winsock 1.1\n"); + return(-1); + } +#else + /* SIGPIPE is generated when a remote socket is closed */ + void (*handler)(int); + handler = signal(SIGPIPE, SIG_IGN); + if ( handler != SIG_DFL ) { + signal(SIGPIPE, handler); + } +#endif + } + ++SDLNet_started; + return(0); +} +void SDLNet_Quit(void) +{ + if ( SDLNet_started == 0 ) { + return; + } + if ( --SDLNet_started == 0 ) { +#ifdef __USE_W32_SOCKETS + /* Clean up windows networking */ + if ( WSACleanup() == SOCKET_ERROR ) { + if ( WSAGetLastError() == WSAEINPROGRESS ) { +#ifndef _WIN32_WCE + WSACancelBlockingCall(); +#endif + WSACleanup(); + } + } +#else + /* Restore the SIGPIPE handler */ + void (*handler)(int); + handler = signal(SIGPIPE, SIG_DFL); + if ( handler != SIG_IGN ) { + signal(SIGPIPE, handler); + } +#endif + } +} + +/* Resolve a host name and port to an IP address in network form */ +int SDLNet_ResolveHost(IPaddress *address, const char *host, Uint16 port) +{ + int retval = 0; + + /* Perform the actual host resolution */ + if ( host == NULL ) { + address->host = INADDR_ANY; + } else { + address->host = inet_addr(host); + if ( address->host == INADDR_NONE ) { + struct hostent *hp; + + hp = gethostbyname(host); + if ( hp ) { + memcpy(&address->host,hp->h_addr,hp->h_length); + } else { + retval = -1; + } + } + } + address->port = SDL_SwapBE16(port); + + /* Return the status */ + return(retval); +} + +/* Resolve an ip address to a host name in canonical form. + If the ip couldn't be resolved, this function returns NULL, + otherwise a pointer to a static buffer containing the hostname + is returned. Note that this function is not thread-safe. +*/ +/* Written by Miguel Angel Blanch. + * Main Programmer of Arianne RPG. + * http://come.to/arianne_rpg + */ +const char *SDLNet_ResolveIP(const IPaddress *ip) +{ + struct hostent *hp; + struct in_addr in; + + hp = gethostbyaddr((const char *)&ip->host, sizeof(ip->host), AF_INET); + if ( hp != NULL ) { + return hp->h_name; + } + + in.s_addr = ip->host; + return inet_ntoa(in); +} + +int SDLNet_GetLocalAddresses(IPaddress *addresses, int maxcount) +{ + int count = 0; +#ifdef SIOCGIFCONF +/* Defined on Mac OS X */ +#ifndef _SIZEOF_ADDR_IFREQ +#define _SIZEOF_ADDR_IFREQ sizeof +#endif + SOCKET sock; + struct ifconf conf; + char data[4096]; + struct ifreq *ifr; + struct sockaddr_in *sock_addr; + + sock = socket(AF_INET, SOCK_DGRAM, 0); + if ( sock == INVALID_SOCKET ) { + return 0; + } + + conf.ifc_len = sizeof(data); + conf.ifc_buf = (caddr_t) data; + if ( ioctl(sock, SIOCGIFCONF, &conf) < 0 ) { + closesocket(sock); + return 0; + } + + ifr = (struct ifreq*)data; + while ((char*)ifr < data+conf.ifc_len) { + if (ifr->ifr_addr.sa_family == AF_INET) { + if (count < maxcount) { + sock_addr = (struct sockaddr_in*)&ifr->ifr_addr; + addresses[count].host = sock_addr->sin_addr.s_addr; + addresses[count].port = sock_addr->sin_port; + } + ++count; + } + ifr = (struct ifreq*)((char*)ifr + _SIZEOF_ADDR_IFREQ(*ifr)); + } + closesocket(sock); +#elif defined(__WIN32__) + PIP_ADAPTER_INFO pAdapterInfo; + PIP_ADAPTER_INFO pAdapter; + PIP_ADDR_STRING pAddress; + DWORD dwRetVal = 0; + ULONG ulOutBufLen = sizeof (IP_ADAPTER_INFO); + + pAdapterInfo = (IP_ADAPTER_INFO *) SDL_malloc(sizeof (IP_ADAPTER_INFO)); + if (pAdapterInfo == NULL) { + return 0; + } + + if ((dwRetVal = GetAdaptersInfo(pAdapterInfo, &ulOutBufLen)) == ERROR_BUFFER_OVERFLOW) { + pAdapterInfo = (IP_ADAPTER_INFO *) SDL_realloc(pAdapterInfo, ulOutBufLen); + if (pAdapterInfo == NULL) { + return 0; + } + dwRetVal = GetAdaptersInfo(pAdapterInfo, &ulOutBufLen); + } + + if (dwRetVal == NO_ERROR) { + for (pAdapter = pAdapterInfo; pAdapter; pAdapter = pAdapter->Next) { + for (pAddress = &pAdapterInfo->IpAddressList; pAddress; pAddress = pAddress->Next) { + if (count < maxcount) { + addresses[count].host = inet_addr(pAddress->IpAddress.String); + addresses[count].port = 0; + } + ++count; + } + } + } + SDL_free(pAdapterInfo); +#endif + return count; +} + +#if !SDL_DATA_ALIGNED /* function versions for binary compatibility */ + +/* Write a 16 bit value to network packet buffer */ +#undef SDLNet_Write16 +void SDLNet_Write16(Uint16 value, void *areap) +{ + (*(Uint16 *)(areap) = SDL_SwapBE16(value)); +} + +/* Write a 32 bit value to network packet buffer */ +#undef SDLNet_Write32 +void SDLNet_Write32(Uint32 value, void *areap) +{ + *(Uint32 *)(areap) = SDL_SwapBE32(value); +} + +/* Read a 16 bit value from network packet buffer */ +#undef SDLNet_Read16 +Uint16 SDLNet_Read16(void *areap) +{ + return (SDL_SwapBE16(*(Uint16 *)(areap))); +} + +/* Read a 32 bit value from network packet buffer */ +#undef SDLNet_Read32 +Uint32 SDLNet_Read32(void *areap) +{ + return (SDL_SwapBE32(*(Uint32 *)(areap))); +} + +#endif /* !SDL_DATA_ALIGNED */ diff --git a/libs/SDL_net/SDLnetTCP.c b/libs/SDL_net/SDLnetTCP.c new file mode 100644 index 0000000..e68f208 --- /dev/null +++ b/libs/SDL_net/SDLnetTCP.c @@ -0,0 +1,295 @@ +/* + SDL_net: An example cross-platform network library for use with SDL + Copyright (C) 1997-2012 Sam Lantinga + + 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. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ + +/* $Id$ */ + +#include "SDLnetsys.h" +#include "SDL_net.h" + +/* The network API for TCP sockets */ + +/* Since the UNIX/Win32/BeOS code is so different from MacOS, + we'll just have two completely different sections here. +*/ + +struct _TCPsocket { + int ready; + SOCKET channel; + IPaddress remoteAddress; + IPaddress localAddress; + int sflag; +}; + +/* Open a TCP network socket + If 'remote' is NULL, this creates a local server socket on the given port, + otherwise a TCP connection to the remote host and port is attempted. + The newly created socket is returned, or NULL if there was an error. +*/ +TCPsocket SDLNet_TCP_Open(IPaddress *ip) +{ + TCPsocket sock; + struct sockaddr_in sock_addr; + + /* Allocate a TCP socket structure */ + sock = (TCPsocket)malloc(sizeof(*sock)); + if ( sock == NULL ) { + SDLNet_SetError("Out of memory"); + goto error_return; + } + + /* Open the socket */ + sock->channel = socket(AF_INET, SOCK_STREAM, 0); + if ( sock->channel == INVALID_SOCKET ) { + SDLNet_SetError("Couldn't create socket"); + goto error_return; + } + + /* Connect to remote, or bind locally, as appropriate */ + if ( (ip->host != INADDR_NONE) && (ip->host != INADDR_ANY) ) { + + // ######### Connecting to remote + + memset(&sock_addr, 0, sizeof(sock_addr)); + sock_addr.sin_family = AF_INET; + sock_addr.sin_addr.s_addr = ip->host; + sock_addr.sin_port = ip->port; + + /* Connect to the remote host */ + if ( connect(sock->channel, (struct sockaddr *)&sock_addr, + sizeof(sock_addr)) == SOCKET_ERROR ) { + SDLNet_SetError("Couldn't connect to remote host"); + goto error_return; + } + sock->sflag = 0; + } else { + + // ########## Binding locally + + memset(&sock_addr, 0, sizeof(sock_addr)); + sock_addr.sin_family = AF_INET; + sock_addr.sin_addr.s_addr = INADDR_ANY; + sock_addr.sin_port = ip->port; + +/* + * Windows gets bad mojo with SO_REUSEADDR: + * http://www.devolution.com/pipermail/sdl/2005-September/070491.html + * --ryan. + */ +#ifndef WIN32 + /* allow local address reuse */ + { int yes = 1; + setsockopt(sock->channel, SOL_SOCKET, SO_REUSEADDR, (char*)&yes, sizeof(yes)); + } +#endif + + /* Bind the socket for listening */ + if ( bind(sock->channel, (struct sockaddr *)&sock_addr, + sizeof(sock_addr)) == SOCKET_ERROR ) { + SDLNet_SetError("Couldn't bind to local port"); + goto error_return; + } + if ( listen(sock->channel, 5) == SOCKET_ERROR ) { + SDLNet_SetError("Couldn't listen to local port"); + goto error_return; + } + + /* Set the socket to non-blocking mode for accept() */ +#if defined(__BEOS__) && defined(SO_NONBLOCK) + /* On BeOS r5 there is O_NONBLOCK but it's for files only */ + { + long b = 1; + setsockopt(sock->channel, SOL_SOCKET, SO_NONBLOCK, &b, sizeof(b)); + } +#elif defined(O_NONBLOCK) + { + fcntl(sock->channel, F_SETFL, O_NONBLOCK); + } +#elif defined(WIN32) + { + unsigned long mode = 1; + ioctlsocket (sock->channel, FIONBIO, &mode); + } +#elif defined(__OS2__) + { + int dontblock = 1; + ioctl(sock->channel, FIONBIO, &dontblock); + } +#else +#warning How do we set non-blocking mode on other operating systems? +#endif + sock->sflag = 1; + } + sock->ready = 0; + +#ifdef TCP_NODELAY + /* Set the nodelay TCP option for real-time games */ + { int yes = 1; + setsockopt(sock->channel, IPPROTO_TCP, TCP_NODELAY, (char*)&yes, sizeof(yes)); + } +#endif /* TCP_NODELAY */ + + /* Fill in the channel host address */ + sock->remoteAddress.host = sock_addr.sin_addr.s_addr; + sock->remoteAddress.port = sock_addr.sin_port; + + /* The socket is ready */ + return(sock); + +error_return: + SDLNet_TCP_Close(sock); + return(NULL); +} + +/* Accept an incoming connection on the given server socket. + The newly created socket is returned, or NULL if there was an error. +*/ +TCPsocket SDLNet_TCP_Accept(TCPsocket server) +{ + TCPsocket sock; + struct sockaddr_in sock_addr; + socklen_t sock_alen; + + /* Only server sockets can accept */ + if ( ! server->sflag ) { + SDLNet_SetError("Only server sockets can accept()"); + return(NULL); + } + server->ready = 0; + + /* Allocate a TCP socket structure */ + sock = (TCPsocket)malloc(sizeof(*sock)); + if ( sock == NULL ) { + SDLNet_SetError("Out of memory"); + goto error_return; + } + + /* Accept a new TCP connection on a server socket */ + sock_alen = sizeof(sock_addr); + sock->channel = accept(server->channel, (struct sockaddr *)&sock_addr, + &sock_alen); + if ( sock->channel == INVALID_SOCKET ) { + SDLNet_SetError("accept() failed"); + goto error_return; + } +#ifdef WIN32 + { + /* passing a zero value, socket mode set to block on */ + unsigned long mode = 0; + ioctlsocket (sock->channel, FIONBIO, &mode); + } +#elif defined(O_NONBLOCK) + { + int flags = fcntl(sock->channel, F_GETFL, 0); + fcntl(sock->channel, F_SETFL, flags & ~O_NONBLOCK); + } +#endif /* WIN32 */ + sock->remoteAddress.host = sock_addr.sin_addr.s_addr; + sock->remoteAddress.port = sock_addr.sin_port; + + sock->sflag = 0; + sock->ready = 0; + + /* The socket is ready */ + return(sock); + +error_return: + SDLNet_TCP_Close(sock); + return(NULL); +} + +/* Get the IP address of the remote system associated with the socket. + If the socket is a server socket, this function returns NULL. +*/ +IPaddress *SDLNet_TCP_GetPeerAddress(TCPsocket sock) +{ + if ( sock->sflag ) { + return(NULL); + } + return(&sock->remoteAddress); +} + +/* Send 'len' bytes of 'data' over the non-server socket 'sock' + This function returns the actual amount of data sent. If the return value + is less than the amount of data sent, then either the remote connection was + closed, or an unknown socket error occurred. +*/ +int SDLNet_TCP_Send(TCPsocket sock, const void *datap, int len) +{ + const Uint8 *data = (const Uint8 *)datap; /* For pointer arithmetic */ + int sent, left; + + /* Server sockets are for accepting connections only */ + if ( sock->sflag ) { + SDLNet_SetError("Server sockets cannot send"); + return(-1); + } + + /* Keep sending data until it's sent or an error occurs */ + left = len; + sent = 0; + SDLNet_SetLastError(0); + do { + len = send(sock->channel, (const char *) data, left, 0); + if ( len > 0 ) { + sent += len; + left -= len; + data += len; + } + } while ( (left > 0) && ((len > 0) || (SDLNet_GetLastError() == EINTR)) ); + + return(sent); +} + +/* 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 SDLNet_TCP_Recv(TCPsocket sock, void *data, int maxlen) +{ + int len; + + /* Server sockets are for accepting connections only */ + if ( sock->sflag ) { + SDLNet_SetError("Server sockets cannot receive"); + return(-1); + } + + SDLNet_SetLastError(0); + do { + len = recv(sock->channel, (char *) data, maxlen, 0); + } while ( SDLNet_GetLastError() == EINTR ); + + sock->ready = 0; + return(len); +} + +/* Close a TCP network socket */ +void SDLNet_TCP_Close(TCPsocket sock) +{ + if ( sock != NULL ) { + if ( sock->channel != INVALID_SOCKET ) { + closesocket(sock->channel); + } + free(sock); + } +} diff --git a/libs/SDL_net/SDLnetUDP.c b/libs/SDL_net/SDLnetUDP.c new file mode 100644 index 0000000..b81c00e --- /dev/null +++ b/libs/SDL_net/SDLnetUDP.c @@ -0,0 +1,528 @@ +/* + SDL_net: An example cross-platform network library for use with SDL + Copyright (C) 1997-2012 Sam Lantinga + + 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. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ + +/* $Id$ */ + +#include "SDLnetsys.h" +#include "SDL_net.h" + +#ifdef __WIN32__ +#define srandom srand +#define random rand +#endif + +struct UDP_channel { + int numbound; + IPaddress address[SDLNET_MAX_UDPADDRESSES]; +}; + +struct _UDPsocket { + int ready; + SOCKET channel; + IPaddress address; + + struct UDP_channel binding[SDLNET_MAX_UDPCHANNELS]; + + /* For debugging purposes */ + int packetloss; +}; + +/* Allocate/free a single UDP packet 'size' bytes long. + The new packet is returned, or NULL if the function ran out of memory. + */ +extern UDPpacket *SDLNet_AllocPacket(int size) +{ + UDPpacket *packet; + int error; + + + error = 1; + packet = (UDPpacket *)malloc(sizeof(*packet)); + if ( packet != NULL ) { + packet->maxlen = size; + packet->data = (Uint8 *)malloc(size); + if ( packet->data != NULL ) { + error = 0; + } + } + if ( error ) { + SDLNet_SetError("Out of memory"); + SDLNet_FreePacket(packet); + packet = NULL; + } + return(packet); +} +int SDLNet_ResizePacket(UDPpacket *packet, int newsize) +{ + Uint8 *newdata; + + newdata = (Uint8 *)malloc(newsize); + if ( newdata != NULL ) { + free(packet->data); + packet->data = newdata; + packet->maxlen = newsize; + } + return(packet->maxlen); +} +extern void SDLNet_FreePacket(UDPpacket *packet) +{ + if ( packet ) { + if ( packet->data ) + free(packet->data); + 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. + */ +UDPpacket **SDLNet_AllocPacketV(int howmany, int size) +{ + UDPpacket **packetV; + + packetV = (UDPpacket **)malloc((howmany+1)*sizeof(*packetV)); + if ( packetV != NULL ) { + int i; + for ( i=0; ichannel = socket(AF_INET, SOCK_DGRAM, 0); + if ( sock->channel == INVALID_SOCKET ) + { + SDLNet_SetError("Couldn't create socket"); + goto error_return; + } + + /* Bind locally, if appropriate */ + sock_addr.sin_family = AF_INET; + sock_addr.sin_addr.s_addr = INADDR_ANY; + sock_addr.sin_port = SDL_SwapBE16(port); + + /* Bind the socket for listening */ + if ( bind(sock->channel, (struct sockaddr *)&sock_addr, + sizeof(sock_addr)) == SOCKET_ERROR ) { + SDLNet_SetError("Couldn't bind to local port"); + goto error_return; + } + + /* Get the bound address and port */ + sock_len = sizeof(sock_addr); + if ( getsockname(sock->channel, (struct sockaddr *)&sock_addr, &sock_len) < 0 ) { +perror("getsockname"); + SDLNet_SetError("Couldn't get socket address"); + goto error_return; + } + + /* Fill in the channel host address */ + sock->address.host = sock_addr.sin_addr.s_addr; + sock->address.port = sock_addr.sin_port; + +#ifdef SO_BROADCAST + /* Allow LAN broadcasts with the socket */ + { int yes = 1; + setsockopt(sock->channel, SOL_SOCKET, SO_BROADCAST, (char*)&yes, sizeof(yes)); + } +#endif +#ifdef IP_ADD_MEMBERSHIP + /* Receive LAN multicast packets on 224.0.0.1 + This automatically works on Mac OS X, Linux and BSD, but needs + this code on Windows. + */ + /* A good description of multicast can be found here: + http://www.docs.hp.com/en/B2355-90136/ch05s05.html + */ + /* FIXME: Add support for joining arbitrary groups to the API */ + { + struct ip_mreq g; + + g.imr_multiaddr.s_addr = inet_addr("224.0.0.1"); + g.imr_interface.s_addr = INADDR_ANY; + setsockopt(sock->channel, IPPROTO_IP, IP_ADD_MEMBERSHIP, + (char*)&g, sizeof(g)); + } +#endif + + /* The socket is ready */ + + return(sock); + +error_return: + SDLNet_UDP_Close(sock); + + return(NULL); +} + +void SDLNet_UDP_SetPacketLoss(UDPsocket sock, int percent) +{ + /* FIXME: We may want this behavior to be reproducible + but there isn't a portable reentrant random + number generator with good randomness. + */ + srandom(SDL_GetTicks()); + + if (percent < 0) { + percent = 0; + } else if (percent > 100) { + percent = 100; + } + sock->packetloss = percent; +} + +/* Verify that the channel is in the valid range */ +static int ValidChannel(int channel) +{ + if ( (channel < 0) || (channel >= SDLNET_MAX_UDPCHANNELS) ) { + SDLNet_SetError("Invalid channel"); + return(0); + } + return(1); +} + +/* Bind the address 'address' to the requested channel on the UDP socket. + If the channel is -1, then the first unbound channel will be bound with + the given address as it's primary address. + If the channel is already bound, this new address will be added to the + list of valid source addresses for packets arriving on the channel. + If the channel is not already bound, then the address becomes the primary + address, to which all outbound packets on the channel are sent. + This function returns the channel which was bound, or -1 on error. +*/ +int SDLNet_UDP_Bind(UDPsocket sock, int channel, const IPaddress *address) +{ + struct UDP_channel *binding; + + if ( sock == NULL ) { + SDLNet_SetError("Passed a NULL socket"); + return(-1); + } + + if ( channel == -1 ) { + for ( channel=0; channel < SDLNET_MAX_UDPCHANNELS; ++channel ) { + binding = &sock->binding[channel]; + if ( binding->numbound < SDLNET_MAX_UDPADDRESSES ) { + break; + } + } + } else { + if ( ! ValidChannel(channel) ) { + return(-1); + } + binding = &sock->binding[channel]; + } + if ( binding->numbound == SDLNET_MAX_UDPADDRESSES ) { + SDLNet_SetError("No room for new addresses"); + return(-1); + } + binding->address[binding->numbound++] = *address; + return(channel); +} + +/* Unbind all addresses from the given channel */ +void SDLNet_UDP_Unbind(UDPsocket sock, int channel) +{ + if ( (channel >= 0) && (channel < SDLNET_MAX_UDPCHANNELS) ) { + sock->binding[channel].numbound = 0; + } +} + +/* Get the primary IP address of the remote system associated with the + socket and channel. + If the channel is not bound, this function returns NULL. + */ +IPaddress *SDLNet_UDP_GetPeerAddress(UDPsocket sock, int channel) +{ + IPaddress *address; + + address = NULL; + switch (channel) { + case -1: + /* Return the actual address of the socket */ + address = &sock->address; + break; + default: + /* Return the address of the bound channel */ + if ( ValidChannel(channel) && + (sock->binding[channel].numbound > 0) ) { + address = &sock->binding[channel].address[0]; + } + break; + } + return(address); +} + +/* Send a vector of packets to the the channels specified within the packet. + If the channel specified in the packet is -1, the packet will be sent to + the address in the 'src' member of the packet. + Each packet will be updated with the status of the packet after it has + been sent, -1 if the packet send failed. + This function returns the number of packets sent. +*/ +int SDLNet_UDP_SendV(UDPsocket sock, UDPpacket **packets, int npackets) +{ + int numsent, i, j; + struct UDP_channel *binding; + int status; + int sock_len; + struct sockaddr_in sock_addr; + + if ( sock == NULL ) { + SDLNet_SetError("Passed a NULL socket"); + return(0); + } + + /* Set up the variables to send packets */ + sock_len = sizeof(sock_addr); + + numsent = 0; + for ( i=0; ipacketloss) { + if ((random()%100) <= sock->packetloss) { + packets[i]->status = packets[i]->len; + ++numsent; + continue; + } + } + + /* if channel is < 0, then use channel specified in sock */ + + if ( packets[i]->channel < 0 ) + { + sock_addr.sin_addr.s_addr = packets[i]->address.host; + sock_addr.sin_port = packets[i]->address.port; + sock_addr.sin_family = AF_INET; + status = sendto(sock->channel, + packets[i]->data, packets[i]->len, 0, + (struct sockaddr *)&sock_addr,sock_len); + if ( status >= 0 ) + { + packets[i]->status = status; + ++numsent; + } + } + else + { + /* Send to each of the bound addresses on the channel */ +#ifdef DEBUG_NET + printf("SDLNet_UDP_SendV sending packet to channel = %d\n", packets[i]->channel ); +#endif + + binding = &sock->binding[packets[i]->channel]; + + for ( j=binding->numbound-1; j>=0; --j ) + { + sock_addr.sin_addr.s_addr = binding->address[j].host; + sock_addr.sin_port = binding->address[j].port; + sock_addr.sin_family = AF_INET; + status = sendto(sock->channel, + packets[i]->data, packets[i]->len, 0, + (struct sockaddr *)&sock_addr,sock_len); + if ( status >= 0 ) + { + packets[i]->status = status; + ++numsent; + } + } + } + } + + return(numsent); +} + +int SDLNet_UDP_Send(UDPsocket sock, int channel, UDPpacket *packet) +{ + /* This is silly, but... */ + packet->channel = channel; + return(SDLNet_UDP_SendV(sock, &packet, 1)); +} + +/* Returns true if a socket is has data available for reading right now */ +static int SocketReady(SOCKET sock) +{ + int retval = 0; + struct timeval tv; + fd_set mask; + + /* Check the file descriptors for available data */ + do { + SDLNet_SetLastError(0); + + /* Set up the mask of file descriptors */ + FD_ZERO(&mask); + FD_SET(sock, &mask); + + /* Set up the timeout */ + tv.tv_sec = 0; + tv.tv_usec = 0; + + /* Look! */ + retval = select(sock+1, &mask, NULL, NULL, &tv); + } while ( SDLNet_GetLastError() == EINTR ); + + return(retval == 1); +} + +/* Receive a vector of pending packets from the UDP socket. + The returned packets contain the source address and the channel they arrived + on. If they did not arrive on a bound channel, the the channel will be set + to -1. + This function returns the number of packets read from the network, or -1 + on error. This function does not block, so can return 0 packets pending. +*/ +extern int SDLNet_UDP_RecvV(UDPsocket sock, UDPpacket **packets) +{ + int numrecv, i, j; + struct UDP_channel *binding; + socklen_t sock_len; + struct sockaddr_in sock_addr; + + if ( sock == NULL ) { + return(0); + } + + numrecv = 0; + while ( packets[numrecv] && SocketReady(sock->channel) ) + { + UDPpacket *packet; + + packet = packets[numrecv]; + + sock_len = sizeof(sock_addr); + packet->status = recvfrom(sock->channel, + packet->data, packet->maxlen, 0, + (struct sockaddr *)&sock_addr, + &sock_len); + if ( packet->status >= 0 ) { + packet->len = packet->status; + packet->address.host = sock_addr.sin_addr.s_addr; + packet->address.port = sock_addr.sin_port; + packet->channel = -1; + + for (i=(SDLNET_MAX_UDPCHANNELS-1); i>=0; --i ) + { + binding = &sock->binding[i]; + + for ( j=binding->numbound-1; j>=0; --j ) + { + if ( (packet->address.host == binding->address[j].host) && + (packet->address.port == binding->address[j].port) ) + { + packet->channel = i; + goto foundit; /* break twice */ + } + } + } +foundit: + ++numrecv; + } + + else + { + packet->len = 0; + } + } + + sock->ready = 0; + + return(numrecv); +} + +/* Receive a single packet from the UDP socket. + The returned packet contains the source address and the channel it arrived + on. If it did not arrive on a bound channel, the the channel will be set + to -1. + This function returns the number of packets read from the network, or -1 + on error. This function does not block, so can return 0 packets pending. +*/ +int SDLNet_UDP_Recv(UDPsocket sock, UDPpacket *packet) +{ + UDPpacket *packets[2]; + + /* Receive a packet array of 1 */ + packets[0] = packet; + packets[1] = NULL; + return(SDLNet_UDP_RecvV(sock, packets)); +} + +/* Close a UDP network socket */ +extern void SDLNet_UDP_Close(UDPsocket sock) +{ + if ( sock != NULL ) + { + if ( sock->channel != INVALID_SOCKET ) + { + closesocket(sock->channel); + } + + free(sock); + } +} + diff --git a/libs/SDL_net/SDLnetselect.c b/libs/SDL_net/SDLnetselect.c new file mode 100644 index 0000000..e14e0c3 --- /dev/null +++ b/libs/SDL_net/SDLnetselect.c @@ -0,0 +1,163 @@ +/* + SDL_net: An example cross-platform network library for use with SDL + Copyright (C) 1997-2012 Sam Lantinga + + 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. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ + +/* $Id$ */ + +#include "SDLnetsys.h" +#include "SDL_net.h" + +/* The select() API for network sockets */ + +struct SDLNet_Socket { + int ready; + SOCKET channel; +}; + +struct _SDLNet_SocketSet { + int numsockets; + int maxsockets; + struct SDLNet_Socket **sockets; +}; + +/* Allocate a socket set for use with SDLNet_CheckSockets() + This returns a socket set for up to 'maxsockets' sockets, or NULL if + the function ran out of memory. + */ +SDLNet_SocketSet SDLNet_AllocSocketSet(int maxsockets) +{ + struct _SDLNet_SocketSet *set; + int i; + + set = (struct _SDLNet_SocketSet *)malloc(sizeof(*set)); + if ( set != NULL ) { + set->numsockets = 0; + set->maxsockets = maxsockets; + set->sockets = (struct SDLNet_Socket **)malloc + (maxsockets*sizeof(*set->sockets)); + if ( set->sockets != NULL ) { + for ( i=0; isockets[i] = NULL; + } + } else { + free(set); + set = NULL; + } + } + return(set); +} + +/* Add a socket to a set of sockets to be checked for available data */ +int SDLNet_AddSocket(SDLNet_SocketSet set, SDLNet_GenericSocket sock) +{ + if ( sock != NULL ) { + if ( set->numsockets == set->maxsockets ) { + SDLNet_SetError("socketset is full"); + return(-1); + } + set->sockets[set->numsockets++] = (struct SDLNet_Socket *)sock; + } + return(set->numsockets); +} + +/* Remove a socket from a set of sockets to be checked for available data */ +int SDLNet_DelSocket(SDLNet_SocketSet set, SDLNet_GenericSocket sock) +{ + int i; + + if ( sock != NULL ) { + for ( i=0; inumsockets; ++i ) { + if ( set->sockets[i] == (struct SDLNet_Socket *)sock ) { + break; + } + } + if ( i == set->numsockets ) { + SDLNet_SetError("socket not found in socketset"); + return(-1); + } + --set->numsockets; + for ( ; inumsockets; ++i ) { + set->sockets[i] = set->sockets[i+1]; + } + } + return(set->numsockets); +} + +/* This function checks to see if data is available for reading on the + given set of sockets. If 'timeout' is 0, it performs a quick poll, + otherwise the function returns when either data is available for + reading, or the timeout in milliseconds has elapsed, which ever occurs + first. This function returns the number of sockets ready for reading, + or -1 if there was an error with the select() system call. +*/ +int SDLNet_CheckSockets(SDLNet_SocketSet set, Uint32 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 { + SDLNet_SetLastError(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 ( SDLNet_GetLastError() == EINTR ); + + /* 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); +} + +/* Free a set of sockets allocated by SDL_NetAllocSocketSet() */ +extern void SDLNet_FreeSocketSet(SDLNet_SocketSet set) +{ + if ( set ) { + free(set->sockets); + free(set); + } +} + diff --git a/libs/SDL_net/SDLnetsys.h b/libs/SDL_net/SDLnetsys.h new file mode 100644 index 0000000..b5cd95b --- /dev/null +++ b/libs/SDL_net/SDLnetsys.h @@ -0,0 +1,94 @@ +/* + SDL_net: An example cross-platform network library for use with SDL + Copyright (C) 1997-2012 Sam Lantinga + + 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. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ + +/* $Id$ */ + +/* Include normal system headers */ +#include +#include +#include + +#ifndef _WIN32_WCE +#include +#endif + +/* Include system network headers */ +#if defined(__WIN32__) || defined(WIN32) +#define __USE_W32_SOCKETS +#ifdef _WIN64 +#include +#include +#else +#include +/* NOTE: windows socklen_t is signed + * and is defined only for winsock2. */ +typedef int socklen_t; +#endif /* W64 */ +#include +#else /* UNIX */ +#include +#ifdef __FreeBSD__ +#include +#endif +#include +#include +#include +#include +#include +#ifndef __BEOS__ +#include +#endif +#ifdef linux /* FIXME: what other platforms have this? */ +#include +#endif +#include +#include +#include +#endif /* WIN32 */ + +/* FIXME: What platforms need this? */ +#if 0 +typedef Uint32 socklen_t; +#endif + +/* System-dependent definitions */ +#ifndef __USE_W32_SOCKETS +#ifdef __OS2__ +#define closesocket soclose +#else /* !__OS2__ */ +#define closesocket close +#endif /* __OS2__ */ +#define SOCKET int +#define INVALID_SOCKET -1 +#define SOCKET_ERROR -1 +#endif /* __USE_W32_SOCKETS */ + +#ifdef __USE_W32_SOCKETS +#define SDLNet_GetLastError WSAGetLastError +#define SDLNet_SetLastError WSASetLastError +#ifndef EINTR +#define EINTR WSAEINTR +#endif +#else +int SDLNet_GetLastError(void); +void SDLNet_SetLastError(int err); +#endif + diff --git a/server/makefile b/server/makefile index 20211b4..7ec6eaf 100644 --- a/server/makefile +++ b/server/makefile @@ -1,6 +1,6 @@ #config CXXFLAGS+=-std=c++11 -DDEBUG -LIB=-lwsock32 -lWS2_32 +LIB=-lmingw32 -lSDL_net -lSDLmain -lSDL -lwsock32 -liphlpapi #source SRC=$(filter-out unit.cpp main.cpp, $(wildcard *.cpp))