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List DHCP Servers leased clients IP addresses

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hrvboy
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2019/09/07 11:35:29 (permalink)
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List DHCP Servers leased clients IP addresses

I am using TCP/IP Stack version 7.31 on a PIC32MZ2048EFMH144 chip using Harmony Configurator 2.0.5.2.
 
I am using the PIC as a DHCP Server to assign IP addresses to other client devices. This works correctly. What I am trying to do now is get a list of IP addresses that have been assigned out. Ideally is to get a list of current connected clients. I plan to iterate through the clients and query their states through either TCP or UDP. The problem I am having is getting the list of IP addresses from the DHCP Server (service) running. 
 
Running the following I can get the number of clients.
int tmpInt = TCPIP_DHCPS_GetPoolEntries(netH, DHCP_SERVER_POOL_ENTRY_IN_USE); // In Use clients
int tmpInt = TCPIP_DHCPS_GetPoolEntries(netH, DHCP_SERVER_POOL_ENTRY_ALL); // All clients
 
This returns a 2 for the two clients I have connected. Now I want their IP addresses.
 
To get their IP addresses, it appears that I need to use the command TCPIP_DHCPS_LeaseEntryGet() in dhcps.c.
 
This function returns a TCPIP_DHCPS_LEASE_HANDLE and also requires a TCPIP_DHCPS_LEASE_HANDLE as an argument. Since this is the only function that returns a TCPIP_DHCPS_LEASE_HANDLE, what do I pass to the function as an argument and where do I get it?
 
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    rainad
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    Re: List DHCP Servers leased clients IP addresses 2019/09/09 09:55:01 (permalink)
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    Looking at the code, looks like the first value for the TCPIP_DHCPS_LEASE_HANDLE parameter could be 0.
    After that, use the returned value, until 0 is returned, meaning end of leases.
    But the description of the function is not clear, I agree.
    We'll fix it and provide an update.
    Thank you for reporting this.
     
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