The GtkRadiant sources as originally released under the GPL license.

libs/l_net/l_net.h

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+/*
+Copyright (C) 1999-2006 Id Software, Inc. and contributors.
+For a list of contributors, see the accompanying CONTRIBUTORS file.
+
+This file is part of GtkRadiant.
+
+GtkRadiant is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+GtkRadiant is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GtkRadiant; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+//====================================================================
+//
+// Name:			l_net.h
+// Function:		-
+// Programmer:		MrElusive
+// Last update:		TTimo: cross-platform version, l_net library
+// Tab size:		2
+// Notes:
+//====================================================================
+
+//++timo FIXME: the l_net code understands that as the max size for the netmessage_s structure
+//  we have defined unsigned char data[MAX_NETMESSAGE] in netmessage_s but actually it cannot be filled completely
+//  we need to introduce a new #define and adapt to data[MAX_NETBUFFER]
+#define MAX_NETMESSAGE		1024
+#define MAX_NETADDRESS		32
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef __BYTEBOOL__
+#define __BYTEBOOL__
+typedef enum { qfalse, qtrue } qboolean;
+typedef unsigned char byte;
+#endif
+
+typedef struct address_s
+{
+	char ip[MAX_NETADDRESS];
+} address_t;
+
+typedef struct sockaddr_s
+{
+	short sa_family;
+	unsigned char sa_data[14];
+} sockaddr_t;
+
+typedef struct netmessage_s
+{
+	unsigned char data[MAX_NETMESSAGE];
+	int size;
+	int read;
+	int readoverflow;
+} netmessage_t;
+
+typedef struct socket_s
+{
+	int socket;							//socket number
+	sockaddr_t addr;					//socket address
+	netmessage_t msg;					//current message being read
+	int remaining;						//remaining bytes to read for the current message
+	struct socket_s *prev, *next;	//prev and next socket in a list
+} socket_t;
+
+//compare addresses
+int Net_AddressCompare(address_t *addr1, address_t *addr2);
+//gives the address of a socket
+void Net_SocketToAddress(socket_t *sock, address_t *address);
+//converts a string to an address
+void Net_StringToAddress(char *string, address_t *address);
+//set the address ip port
+void Net_SetAddressPort(address_t *address, int port);
+//send a message to the given socket
+int Net_Send(socket_t *sock, netmessage_t *msg);
+//recieve a message from the given socket
+int Net_Receive(socket_t *sock, netmessage_t *msg);
+//connect to a host
+// NOTE: port is the localhost port, usually 0
+// ex: Net_Connect( "192.168.0.1:39000", 0 )
+socket_t *Net_Connect(address_t *address, int port);
+//disconnect from a host
+void Net_Disconnect(socket_t *sock);
+//returns the local address
+void Net_MyAddress(address_t *address);
+//listen at the given port
+socket_t *Net_ListenSocket(int port);
+//accept new connections at the given socket
+socket_t *Net_Accept(socket_t *sock);
+//setup networking
+int Net_Setup(void);
+//shutdown networking
+void Net_Shutdown(void);
+//message handling
+void  NMSG_Clear(netmessage_t *msg);
+void  NMSG_WriteChar(netmessage_t *msg, int c);
+void  NMSG_WriteByte(netmessage_t *msg, int c);
+void  NMSG_WriteShort(netmessage_t *msg, int c);
+void  NMSG_WriteLong(netmessage_t *msg, int c);
+void  NMSG_WriteFloat(netmessage_t *msg, float c);
+void  NMSG_WriteString(netmessage_t *msg, char *string);
+void  NMSG_ReadStart(netmessage_t *msg);
+int   NMSG_ReadChar(netmessage_t *msg);
+int   NMSG_ReadByte(netmessage_t *msg);
+int   NMSG_ReadShort(netmessage_t *msg);
+int   NMSG_ReadLong(netmessage_t *msg);
+float NMSG_ReadFloat(netmessage_t *msg);
+char *NMSG_ReadString(netmessage_t *msg);
+
+//++timo FIXME: the WINS_ things are not necessary, they can be made portable arther easily
+char *WINS_ErrorMessage(int error);
+
+#ifdef __cplusplus
+}
+#endif