<HTML> <!-- ex05.htm,v 1.2 2000/06/04 22:02:08 brunsch Exp --> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <META NAME="Author" CONTENT="Ambreen Ilyas"> <META NAME="GENERATOR" CONTENT="Mozilla/4.05 [en] (X11; I; SunOS 5.5.1 sun4u) [Netscape]"> <TITLE>Example 5</TITLE> </HEAD> <BODY> <FONT COLOR="#CC0000">/////////////////////////////////////////////////////////////////////////////////////////////////////////////////</FONT> <BR><FONT COLOR="#CC0000">//// This example is from the ACE Programmers Guide.</FONT> <BR><FONT COLOR="#CC0000">//// Chapter: "IPC SAP" (Interprocess Communication Mechanisms in ACE).</FONT> <BR><FONT COLOR="#CC0000">//// For details please see the guide at</FONT> <BR><FONT COLOR="#CC0000">//// http://www.cs.wustl.edu/~schmidt/ACE.html</FONT> <BR><FONT COLOR="#CC0000">//// AUTHOR: Umar Syyid (usyyid@hns.com)</FONT> <BR><FONT COLOR="#CC0000">//// and Ambreen Ilyas (ambreen@bitsmart.com)</FONT> <BR><FONT COLOR="#CC0000">/////////////////////////////////////////////////////////////////////////////////////////////////////////////</FONT> <P><FONT COLOR="#CC0000">//Example 5</FONT> <BR><FONT COLOR="#000099">#include</FONT> <FONT COLOR="#006600">"ace/SOCK_Dgram_Mcast.h"</FONT> <BR><FONT COLOR="#000099">#include</FONT> <FONT COLOR="#006600">"ace/OS.h"</FONT> <BR><FONT COLOR="#000099">#define</FONT> <FONT COLOR="#663366">DEFAULT_MULTICAST_ADDR "224.9.9.2"</FONT> <BR><FONT COLOR="#000099">#define</FONT> <FONT COLOR="#663366">TIMEOUT 5</FONT> <P>class Reciever_Multicast{ <P>public: <BR>Reciever_Multicast(int port): <BR> mcast_addr_(port,DEFAULT_MULTICAST_ADDR),remote_addr_((u_short)0){ <BR> <FONT COLOR="#FF0000"> // Subscribe to multicast address.</FONT> <BR> if (mcast_dgram_.subscribe (mcast_addr_) == -1){ <BR> ACE_DEBUG((LM_DEBUG,"Error in subscribing to Multicast address \n")); <BR> exit(-1); <BR> } <BR>} <P>~Reciever_Multicast(){ <BR> if(mcast_dgram_.unsubscribe()==-1) <BR> ACE_DEBUG((LM_ERROR,?Error in unsubscribing from Mcast group\n?)); <BR> } <BR> <BR> <BR> <P><FONT COLOR="#FF0000">//Receive data from someone who is sending data on the multicast group</FONT> <BR><FONT COLOR="#FF0000">//address to do so it must use the multicast datagram component</FONT> <BR><FONT COLOR="#FF0000">//mcast_dgram_.</FONT> <BR>int recv_multicast(){ <BR><FONT COLOR="#FF0000"> //get ready to recieve data from the sender.</FONT> <BR> if(mcast_dgram_.recv <BR> (&mcast_info,sizeof (mcast_info),remote_addr_)==-1) <BR> return -1; <BR> ACE_DEBUG ((LM_DEBUG, "(%P|%t) Received multicast from %s:%d.\n", <BR> remote_addr_.get_host_name(), remote_addr_.get_port_number())); <BR> ACE_DEBUG((LM_DEBUG,"Successfully receieved %d\n", mcast_info)); <BR> return 0; <BR> } <P>private: <BR> ACE_INET_Addr mcast_addr_; <BR> ACE_INET_Addr remote_addr_; <BR> ACE_SOCK_Dgram_Mcast mcast_dgram_; <BR> int mcast_info; <BR>}; <BR> <BR> <BR>int main(int argc, char*argv[]){ <BR> Reciever_Multicast m(2000); <BR> <FONT COLOR="#FF0000">//Will run forever</FONT> <BR> while(m.recv_multicast()!=-1) { <BR> ACE_DEBUG((LM_DEBUG,"Multicaster succesful \n")); <BR> } <BR> <BR> ACE_DEBUG((LM_ERROR,"Multicaster failed \n")); <BR> exit(-1); <BR>} <P> <A HREF="ex06.html">Next Example</A> <BR> </BODY> </HTML>