-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 04/09/15 02:20, Sivabalakrishnan M wrote: > Hi Simon, > > I would like to understand how tags (setting tags, matching tags > for dhcp-range, dhcp-option, dhcp-match) work. Is there any > documentation I can refer? Please let me know. > > Or we have all the info here - > http://www.thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html
That pretty much covers it. > > Also, what are the guidelines that dnsmasq follow in assigning the > IP addresses if there are multiple configurations that matches a > DHCP request (for e.g. both dhcp range and dhcp-host configurations > match for the incoming DHCP request)? Please let me know. In that case it's undefined. Any dhcp-range which matches the tags or any dhcp-range which is not qualified with tags. The only condition that it defined is that a dhcp-range which has tags will be used before dhcp-range without tags. The tagless dhcp-range could still be used if, for example, a tagged dhcp-range was full up, with all the avail able addresses in use. Cheers, Simon. > > Thanks, Siva > > On Fri, Aug 21, 2015 at 12:57 PM, Sivabalakrishnan M < > sivabalakrishna...@gmail.com> wrote: > >> Thanks much Simon. Yes, this helps. Got it. >> >> Thanks, Siva >> >> On Fri, Aug 21, 2015 at 12:50 PM, Simon Kelley >> <si...@thekelleys.org.uk> wrote: >> > The expiry time is passed to the script in an enviromment variable > called DNSMASQ_LEASE_EXPIRES. There are a hold heap of these > variables, documented in the man page. > > As an aside, the reason it's done like this is because the first > version of the script was provided with only the information in > the argv. When extra information was added, it was done via the > environment to maintain backwards compatiblity. > > Cheers, > > Simon. > > > On 21/08/15 07:12, Sivabalakrishnan M wrote: >>>>> Hi, >>>>> >>>>> We are using dnsmasq for dhcp and tftp server in our >>>>> project. And for leases file, our requirement is to >>>>> maintain the leases information in our database without >>>>> using dnsmasq.leases file. >>>>> >>>>> For this, we plan to use "--dhcp-script=" option to provide >>>>> our script path that would be invoked by dnsmasq for >>>>> updating leases (add, del, old arguments). Also, we will be >>>>> using "--leasefile-ro" option so that dnsmasq doesn't use >>>>> dnsmasq.leases file at all and during reboot or init time, >>>>> dnsmasq will invoke our script with "init" argument so that >>>>> our script will retrieve the information from our config >>>>> database and print it to stdout. >>>>> >>>>> While going through dnsmasq source code, it looks like for >>>>> updating the leases (add, del, old), dnsmasq doesn't seem >>>>> to provide the lease time expiry in epoch format (MAC >>>>> address, IP address, host name, client id are given). So, >>>>> we are not sure how we can maintain leases on our own. >>>>> Could you please clarify on this? >>>>> >>>>> The following is the code in helper.c file (function - >>>>> create_helper(), line number is 563) that am referring >>>>> (version 2.75). As we see here, we are not passing lease >>>>> expiry time while invoking the script. Please help on this >>>>> or let me know if am missing anything on this. >>>>> >>>>> if (err == 0) { execl(daemon->lease_change_command, p ? p+1 >>>>> : daemon->lease_change_command, action_str, is6 ? >>>>> daemon->packet : daemon->dhcp_buff, daemon->addrbuff, >>>>> hostname, (char*)NULL); err = errno; } >>>>> >>>>> Thanks a lot for the help. >>>>> >>>>> Thanks, Siva >>>>> >>> >> >> > -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIcBAEBCAAGBQJWAWsUAAoJEBXN2mrhkTWik+4P/RUbME6OuoDpygO4nIGd+MpR G8X+eVzcRVkhadyz4sbU6rcq5RDqkMp80/0KZK9NJKBTHsCssVMeIM1A/y5yYWiC tiexUO+H/FzA0Ag20ph88lyWWvc4nWBYCBPbi0pA5QBv4t4pNrC/nU5itWkx+c+V Hb0Qa1rFEK2tDaCval8I6uDURrurdLRgvLF9ezTuHhfIRWzEz2eaM8PAh5zA+6ma hTyxBflXuvUafFUwM3zOzOZMKl0L+9bWtDkEA7AqAznpJAQ67evHYUuvjRa2fzQA Gv4NBXI95oQIiUQED3bBIuqV93vLzMCGjNVT8GqUS99Oyb/O4h4IjMCTXy9gxG1d tPxENEEBZFht87mXygqStTH/EfIakZ6ikTSzCLb12S/6y/NM6JJKkkl1mzs8J7nJ MP7FYJoo8fj9+vP631/Ke9FQJQMhKacAsfgNwebdxjMbEt81vjJE+IrtA3nmxqtW vgDgqvG96Qv4DIodk3BFcHIX2e9iWcBP9JXTzT93SWs7N/hGAPiQvTsAzjo4zU1z qjI8r4Oa3NlQW38t112BO7XtgkHFRZ4xJ84X65tPOCvOgJ4IdwQojleUPyo1wsM/ ByqTHiktfcOvA88kNfWD91p1R6h3W2wO6mPuWaCRSwJUfBaFilIWQnQCtSsNeo/5 qQYoL+dqDmoi0+Dj6CzJ =zLMb -----END PGP SIGNATURE----- _______________________________________________ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss