Re: addding new fd in select() for recieving request

Hello Dev,

This means that in main() of my subagent

main()
{
        init_agent("snmpV3Agent");
        init_currentAlarmTable();
        init_snmp("snmpV3Agent");
         ... .
         ........
        //start listning for client
        listener = socket(AF_INET, SOCK_STREAM, 0);
        bind(listener, (struct sockaddr *)&myaddr, sizeof(myaddr));
        listen(listener, 10)

        while()
        {
            snmp_select_info(&numfds, &read_fds, NULL, 0);
            select(numfds,&read_fds,0,0,NULL)
             if (FD_ISSET(listener , &read_fds))
             {
                 //accept when ready to be read
                 newfd = accept(listener, (struct sockaddr *)&remoteaddr,&addrlen)
                 
                  //myfunction1 --->reads the data add it to queue and forward to manager as a TRAP
                 register_readfd(&numfds,(*myfunction1),NULL);
             }
         }

}

or it is just call snmp_select_info() with readfds containing my fd and just call register_readfd() not even check for FD_ISSET(). This will automatically accept the connection when the fd is ready to be read and in the function pointer(call back method) i can write the code to extract the data.

Is it. Please do reply if i am wrong anywhere.


--Thanks a lot



----- Original Message -----
From: Dave Shield <[email protected]>
To: [email protected]
Cc: [email protected]
Sent: Mon, 9 Jun 2008 13:40:40 +0530 (IST)
Subject: Re: addding new fd in select() for recieving request

2008/6/9  <[email protected]>:
> I have a requirement that i also need to listen for alarms coming
> from another application on socket and forward them to manager
> apart from GET/SET request from Manager

Have a look at the 'register_readfd()' routine
which is designed for exactly this purpose.


> I am thinking of doing it in following manner.
> Please comment on the following if it is wrong

You do not need to change the main() code.
The Net-SNMP toolkit already supports the
functionality you require.

Dave



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