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Wireshark-users: Re: [Wireshark-users] DHCP-FO Message Type and Server Status

From: Graham Bloice <graham.bloice@xxxxxxxxxxxxx>
Date: Tue, 08 Feb 2011 15:24:18 +0000
On 08/02/2011 15:08, Jürgen Dietl wrote:
Hello, its me again,

I am still fighting with DHCP-Fail Over. I am very happy that there is a dissector for dhcp-fo already in wireshark and I say a big thanx for this.

When I look at the packet-dhcp-failover.c at http://ethereal.sourcearchive.com/documentation/0.10.10/packet-dhcp-failover_8c-source.html
I can see the following server and message type:

DHCP_FO_SS_UNKNOWN_PACKET,
      DHCP_FO_SS_PARTNER_DOWN,
      DHCP_FO_SS_NORMAL,
      DHCP_FO_SS_COMMUNICATION_INTERRUPTED,
      DHCP_FO_SS_RESOLUTION_INTERRUPTED,
      DHCP_FO_SS_POTENTIAL_CONFLICT,
      DHCP_FO_SS_RECOVER,
      DHCP_FO_SS_RECOVER_DONE,
      DHCP_FO_SS_SHUTDOWN,
      DHCP_FO_SS_PAUSED,
      DHCP_FO_SS_STARTUP,
      DHCP_FO_SS_RECOVER_WAIT



/* message-types of failover */
enum {
      DHCP_FO_RESERVED,
      DHCP_FO_POOLREQ,
      DHCP_FO_POOLRESP,
      DHCP_FO_BNDUPD,
      DHCP_FO_BNDACK,
      DHCP_FO_CONNECT,
      DHCP_FO_CONNECTACK,
      DHCP_FO_UPDREQ,
      DHCP_FO_UPDDONE,
      DHCP_FO_UPDREQALL,
      DHCP_FO_STATE,
      DHCP_FO_CONTACT,
      DHCP_FO_DISCONNECT

All of them should have an 8 bit Integer Number. I was not able to find out the numbers with reading the source code so I tried them out. I was successful with the DHCP_FO-message-types:

The number is implied by the order in the enumeration starting from 0, e.g. DHCP_FO_RESERVED is 0, DHCP_FO_POLREQ is 1, and so on.
-- 
Regards,

Graham Bloice