[lwip-devel] [bug #38203] DHCP options are not recorded in all DHCP ack messages

[Christoffer Lind]

URL:
  <http://savannah.nongnu.org/bugs/?38203>

                 Summary: DHCP options are not recorded in all DHCP ack
messages
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: christofferlind
            Submitted on: ons 30 jan 2013 15.43.21
                Category: DHCP
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: 1.4.0

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Details:

The code in dhcp_recv() only calls the function dhcp_handle_ack() if the
current state is DHCP_REQUESTING. According to RFC 2131 "4.4 DHCP client
behavior" the client shall record the lease time in state DHCP_REBOOTING,
DHCP_REBINDING and DHCP_RENEWING as well. As far as I understand from the RFC
this applies to all options (not only the lease time) and the options shall be
updated in all 4 states.

Another thing I noticed was that the server_ip_addr is only updated in
dhcp_handle_offer. This should also be updated in dhcp_handle_ack.







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