netutils/dhcpc/dhcpc: add implementation to get renewal (T1) time and rebinding (T2) time from DHCP packet #3152
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rebinding (T2) time from DHCP packet. According to RFC 2131, T1 and T2 times play a critical role in lease management in DHCP clients. Signed-off-by: nuttxs <[email protected]>
xiaoxiang781216
approved these changes
Aug 5, 2025
cederom
approved these changes
Aug 5, 2025
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Summary
Impact
New Feature/Change: Correctly receive and store T1 and T2 time provided by the server
User Impact: Provide a foundation for the implementation of intelligent renewal mechanism in the future
Build Impact:No new Kconfig options or build system changes.
Hardware Impact: No
Security: No
Compatibility: Backward-compatible; no breaking changes.
Testing
#Use tcpdump to capture DHCP traffic
#View options 58 and 59 in DHCP ACK packets
#Option 58: T1 Time
#Option 59: T2 Time