[lwip-users] is it legal to change lease time in Ack for renew request?

[dogeye]

Hi all,
   My scenario is:
1. After get an IP using DHCP, when it's time to renew the lease, it
sends REQUEST
2. Server respons Ack with a new lease time( option 51 changed), but
without option 58 and 59.
3. The result is the new lease time is not update, and the device is
still using the old one to renew lease because dhcp_bind() only tries
to update T1 and T2, there is no code to update the new lease time.

So, my question is: is it legal to only supply new lease time in ACK
for the renew request? Any other comments are welcome!

Thank you very much.


Jerry