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 4. Derivative works are permitted, but they must carry this notice 00027 in full and credit the original source. 00028 00029 00030 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 00031 00032 00033 @version Initial version, March 2004 00034 @author Kris 00035 00036 00037 *******************************************************************************/ 00038 00039 module mango.io.DatagramSocket; 00040 00041 private import mango.io.Socket, 00042 mango.io.Exception; 00043 00044 private import mango.io.model.IBuffer, 00045 mango.io.model.IConduit; 00046 00047 /******************************************************************************* 00048 00049 Wrapper around datagram style of sockets, to simplify the API a 00050 bit, and to tie them into the IBuffer construct. 00051 00052 Note that when used with a SocketListener you must first bind the 00053 DatagramSocket to a local adapter. This can be done by binding it 00054 to an InternetAddress constructed with a port only (ADDR_ANY). 00055 00056 *******************************************************************************/ 00057 00058 class DatagramSocket : Socket, ISocketReader 00059 { 00060 /*********************************************************************** 00061 00062 Create an internet datagram socket 00063 00064 ***********************************************************************/ 00065 00066 this () 00067 { 00068 super (AddressFamily.INET, Type.DGRAM, Protocol.IP); 00069 } 00070 00071 /*********************************************************************** 00072 00073 Read the available bytes from datagram into the given IBuffer. 00074 The 'from' address will be populated appropriately 00075 00076 ***********************************************************************/ 00077 00078 uint read (IBuffer target, inout Address addr) 00079 in { 00080 assert (target); 00081 } 00082 body 00083 { 00084 uint reader (void[] src) 00085 { 00086 int count = receiveFrom (src, addr); 00087 if (count <= 0) 00088 count = IConduit.Eof; 00089 return count; 00090 } 00091 00092 return target.write (&reader); 00093 } 00094 00095 /*********************************************************************** 00096 00097 Read the available bytes from datagram into the given IBuffer. 00098 The 'from' address will be populated appropriately 00099 00100 ***********************************************************************/ 00101 00102 uint read (IBuffer target) 00103 { 00104 Address addr; 00105 00106 return read (target, addr); 00107 } 00108 00109 /*********************************************************************** 00110 00111 Write content from the specified buffer to the given address. 00112 00113 ***********************************************************************/ 00114 00115 uint write (IBuffer source, Address to) 00116 in { 00117 assert (to); 00118 assert (source); 00119 } 00120 body 00121 { 00122 uint writer (void[] src) 00123 { 00124 int count = sendTo (src, Flags.NONE, to); 00125 if (count <= 0) 00126 count = IConduit.Eof; 00127 return count; 00128 } 00129 00130 int count = source.read (&writer); 00131 00132 // if we didn't write everything, move remaining content 00133 // to front of buffer for a subsequent write 00134 source.compress(); 00135 return count; 00136 } 00137 } 00138