How to enable IP_PKTINFO and IP_RECVPKTINFO in ISC DHCP code

[Renuka Devi]

Hi all,

I want to enable the above flags in ISC DHCP code.
./configure --enable-ipv4-pktinfo enabled only the USE_V4_PKTINFO.
But need all 3 flags (IP_PKTINFO and IP_RECVPKTINFO and USE_V4_PKTINFO) to
enable
support for setsockopt with IP_PKTINFO in ISC DHCP.

Can someone please help here ?
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