On Tue, Sep 24, 2013 at 3:37 PM, Simon Kelley <si...@thekelleys.org.uk> wrote: > On 24/09/13 10:48, Nehal J Wani wrote: >> >> On Tue, Sep 24, 2013 at 1:15 AM, Simon Kelley<si...@thekelleys.org.uk> >> wrote: >>> >>> On 23/09/13 19:12, Nehal J Wani wrote: >>>> >>>> >>>> If I am not wrong, there are 5 fields in a dnsmasq/<network-name>.leases >>>> file: >>>> >>>> (i) Expiry time >>>> (ii) MAC Address >>>> (iii) IP Address >>>> (iv) Hostname >>>> (v) Client ID >>>> >>>> Q1: Is the above order fixed? >>>> Q2: Which values from above can be NULL? (I know that leases contains >>>> '*' for fields whose values are not known, but is it safe to assume >>>> that it will be '*' for any value that is unknown?) >>>> >>> >>> A1: Yes. >>> >>> A2: There will always be an expiry time and an IP address. The hostname >>> and >>> the client-id can be missing, in which case the fields will contain *. >>> >>> The Mac address may have a hardware type (rfc1060) appended like so: >>> >>> 02-01:02:03:04:05:06 >>> >>> If the hardware type is 01 (ethernet), then it's omitted >>> >>> For IEEE1394 clients, the hardware type is 24, and the length of the MAC >>> address is zero, so this appears as >>> >>> 24- >>> >>> See rfc2855 for details. >>> >>> There's also I completely different format for DHCPv6. If DHCPv6 is in >>> use >>> then the IPv4 leases will be terminated with a line like this: >>> >>> duid<server DUID> as colon-separated hex >>> >>> and then there will follow the DHCPv6 leases as >>> >>> 1) Expiry time >>> 2) IAID >>> 3) IPv6 address >>> 4) hostname >>> 5) client DUID >>> >>> >> >> In case of DHCPv6, which of the above 5 fields can be missing (for >> IPv6 addresses)? > > > Only the hostname, which can be replaced with "*" if no hostname is known. > All the others are required. > > For both IPv4 and IPv6 leases, the expiry time can be zero which means > "never". >
Out of the three types: DUID-LLT, DUID-EN and DUID-LL, which one is used by dnsmasq? I am asking because I want to confirm whether the MAC address of the network interface is always a substring of the client DUID or not. > Cheers, > > Simon. > > > >> >>> >>> >>> >>> >>> Cheers, >>> >>> Simon. >>> >>> >>> >>> _______________________________________________ >>> Dnsmasq-discuss mailing list >>> Dnsmasq-discuss@lists.thekelleys.org.uk >>> http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss >> >> >> >> > -- Nehal J Wani UG3, BTech CS+MS(CL) IIIT-Hyderabad http://commandlinewani.blogspot.com _______________________________________________ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
