ISC dhcp-4.2.3 socket is a blocking one????

[ameen.shajahan at wipro.com]

Hi all,
                I am using ISC dhcp-4.2.3. So I would like to know the socket created in ISC is a blocking or a non-blocking socket.
                If it is blocking means how to change it to nonblocking mode.
                I am using socket descriptor (tmp->rfdesc) from dhcp-4.2.3/common/discover.c
                So I would like to know how to change int that file.
                Please let me know

Thanks,
Ameen S

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