00001 /******************************************************************************* 00002 00003 @file DatagramSocket.d 00004 00005 Copyright (C) 2004 Kris Bell 00006 00007 This software is provided 'as-is', without any express or implied 00008 warranty. In no event will the authors be held liable for damages 00009 of any kind arising from the use of this software. 00010 00011 Permission is hereby granted to anyone to use this software for any 00012 purpose, including commercial applications, and to alter it and/or 00013 redistribute it freely, subject to the following restrictions: 00014 00015 1. The origin of this software must not be misrepresented; you must 00016 not claim that you wrote the original software. If you use this 00017 software in a product, an acknowledgment within documentation of 00018 said product would be appreciated but is not required. 00019 00020 2. Altered source versions must be plainly marked as such, and must 00021 not be misrepresented as being the original software. 00022 00023 3. This notice may not be removed or altered from any distribution 00024 of the source. 00025 00026 00027 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 00028 00029 00030 @version Initial version, March 2004 00031 @author Kris 00032 00033 00034 *******************************************************************************/ 00035 00036 module mango.io.DatagramSocket; 00037 00038 private import mango.io.Socket, 00039 mango.io.Exception; 00040 00041 private import mango.io.model.IBuffer, 00042 mango.io.model.IConduit; 00043 00044 /******************************************************************************* 00045 00046 Wrapper around datagram style of sockets, to simplify the API a 00047 bit, and to tie them into the IBuffer construct. 00048 00049 Note that when used with a SocketListener you must first bind the 00050 DatagramSocket to a local adapter. This can be done by binding it 00051 to an InternetAddress constructed with a port only (ADDR_ANY). 00052 00053 *******************************************************************************/ 00054 00055 class DatagramSocket : Socket, ISocketReader 00056 { 00057 /*********************************************************************** 00058 00059 Create an internet datagram socket 00060 00061 ***********************************************************************/ 00062 00063 this () 00064 { 00065 super (Socket.AddressFamily.INET, Socket.Type.DGRAM, Socket.Protocol.IP); 00066 } 00067 00068 /*********************************************************************** 00069 00070 Read the available bytes from datagram into the given IBuffer. 00071 The 'from' address will be populated appropriately 00072 00073 ***********************************************************************/ 00074 00075 int read (IBuffer target, Address addr) 00076 in { 00077 assert (target); 00078 } 00079 body 00080 { 00081 int reader (void[] src) 00082 { 00083 int count = receiveFrom (src, addr); 00084 if (count <= 0) 00085 count = IConduit.Eof; 00086 return count; 00087 } 00088 00089 return target.write (&reader); 00090 } 00091 00092 /*********************************************************************** 00093 00094 Read the available bytes from datagram into the given IBuffer. 00095 The 'from' address will be populated appropriately 00096 00097 ***********************************************************************/ 00098 00099 int read (IBuffer target) 00100 { 00101 Address addr; 00102 00103 return read (target, addr); 00104 } 00105 00106 /*********************************************************************** 00107 00108 Write content from the specified buffer to the given address. 00109 00110 ***********************************************************************/ 00111 00112 int write (IBuffer source, Address to) 00113 in { 00114 assert (to); 00115 assert (source); 00116 } 00117 body 00118 { 00119 int writer (void[] src) 00120 { 00121 int count = sendTo (src, Socket.Flags.NONE, to); 00122 if (count <= 0) 00123 count = IConduit.Eof; 00124 return count; 00125 } 00126 00127 int count = source.read (&writer); 00128 00129 // if we didn't write everything, move remaining content 00130 // to front of buffer for a subsequent write 00131 source.compress(); 00132 return count; 00133 } 00134 } 00135