DHCP client code not retransmitting DHCP discovery

Using Busy-box DHCP client code, DHCP client sends out DHCP discovery packet when the DHCP server is disabled, once DHCP server enabled back, client never timesout and re-transmit discovery again. any client code should timeout if it didn't get reply and re-transmit packet again?.

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Why don't you take a look at the source code and see if it looks like it should be retrying or not.

Then you'll know if the issue is a retry that should be happening not happening (maybe a broken timer or something), or a mechanism that is not included in the implementation at all.

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