Re: [Dnsmasq-discuss] dnsmasq 2.78 is failing to respond to dhcpv6 requests forwarded via relay agent

2019-01-11 Thread Simon Kelley
Great. I'm distressed I didn't remember the issue until I ran "git blame" over the code when putting together debugging instructions. Cheers, Simon. On 11/01/2019 08:47, Sandeep K M wrote: > Thanks a lot Simon, that did the trick. > > The patch fixed the issue. I am able to see the reply

Re: [Dnsmasq-discuss] dnsmasq 2.78 is failing to respond to dhcpv6 requests forwarded via relay agent

2019-01-11 Thread Sandeep K M
Thanks a lot Simon, that did the trick. The patch fixed the issue. I am able to see the reply messages being sent by server and the same being received by the client: Jan 11 06:46:52 dnsmasq[4131]: started, version 2.78 DNS disabled Jan 11 06:46:52 dnsmasq[4131]: compile time options: IPv6

Re: [Dnsmasq-discuss] dnsmasq 2.78 is failing to respond to dhcpv6 requests forwarded via relay agent

2019-01-10 Thread Simon Kelley
Thanks for the offer. I think there may be a simpler answer, worth trying first. Looking back through the git history, this looks like a bug introduced into 2.78 by the patches for security problems found by Google, in 2017. It was fixed for 2.79, by patch

Re: [Dnsmasq-discuss] dnsmasq 2.78 is failing to respond to dhcpv6 requests forwarded via relay agent

2019-01-10 Thread Sandeep K M
Hi Simon, Thanks again for the response. I will be happy to be your tester :) Its fairly a simple setup with two hosts and a switch. I can create this any time you want. Please provide me the instructions. I am using dnsmasq version 2.78. Thanks -Sandeep On Wed, Jan 9, 2019 at 10:33 PM Simon

Re: [Dnsmasq-discuss] dnsmasq 2.78 is failing to respond to dhcpv6 requests forwarded via relay agent

2019-01-09 Thread Simon Kelley
On 04/01/2019 06:25, Sandeep K M wrote: > Hi Simon, > > Thanks a lot for your prompt reply. > > Attached are the packet captures: > > 1. Packets exchanged between client and relay (client-relay.pcap) > 2.  Packets exchanged between relay and server (relay-server.pcap) > 3. strace of dnsmasq

Re: [Dnsmasq-discuss] dnsmasq 2.78 is failing to respond to dhcpv6 requests forwarded via relay agent

2019-01-09 Thread Sandeep K M
Hi, Its a very simple topology, I have tried to recreate the entire setup on a different test bed. I still see the same issue: root@Ubuntu4242:~# tail -f /tmp/dnsmasq Jan 9 01:57:20 dnsmasq-dhcp[2695]: DHCPSOLICIT(eth1) 00:01:00:01:23:c8:76:d7:00:50:56:bd:57:ed Jan 9 01:57:20

Re: [Dnsmasq-discuss] dnsmasq 2.78 is failing to respond to dhcpv6 requests forwarded via relay agent

2019-01-07 Thread Geert Stappers
On Mon, Jan 07, 2019 at 01:09:11PM +0530, Sandeep K M wrote: > On Fri, Jan 4, 2019 at 7:32 PM Geert Stappers wrote: > > On Fri, Jan 04, 2019 at 05:34:03PM +0530, Sandeep K M wrote: > > > > > Please let me know if any other information is needed. > > > > Not yet mentioned in this thread is working

Re: [Dnsmasq-discuss] dnsmasq 2.78 is failing to respond to dhcpv6 requests forwarded via relay agent

2019-01-06 Thread Sandeep K M
Hi, As you suggested I added the IPv6 address 2020::2/120 manually to my client using the below command: *ip -6 addr add 2020::2/120 dev eth1* when I pinged the server it failed : *root@Ubuntu3481:~# ping6 -I 2020::2 1040::2PING 1040::2(1040::2) from 2020::2 : 56 data bytesping: sendmsg:

Re: [Dnsmasq-discuss] dnsmasq 2.78 is failing to respond to dhcpv6 requests forwarded via relay agent

2019-01-04 Thread Geert Stappers
On Fri, Jan 04, 2019 at 05:34:03PM +0530, Sandeep K M wrote: > Hi, > > On Fri, Jan 4, 2019 at 3:59 PM Geert Stappers wrote: > > On Fri, Jan 04, 2019 at 02:47:11PM +0530, Sandeep K M wrote: > > > On Fri, Jan 4, 2019 at 2:30 PM Geert Stappers wrote: > > > > On Fri, Jan 04, 2019 at 11:55:49AM +0530,

Re: [Dnsmasq-discuss] dnsmasq 2.78 is failing to respond to dhcpv6 requests forwarded via relay agent

2019-01-04 Thread Sandeep K M
Hi, These command output is what I have captured previously for my reference before dissembling the setup. I tried to capture only the relevant interface output but not all. *I have recreated the setup and attached (ip-command-output.txt) is the output of the commands that you have requested in

Re: [Dnsmasq-discuss] dnsmasq 2.78 is failing to respond to dhcpv6 requests forwarded via relay agent

2019-01-04 Thread Geert Stappers
On Fri, Jan 04, 2019 at 02:47:11PM +0530, Sandeep K M wrote: > On Fri, Jan 4, 2019 at 2:30 PM Geert Stappers wrote: > > On Fri, Jan 04, 2019 at 11:55:49AM +0530, Sandeep K M wrote: > > > [ ] > > > > > > Please let me know if any other information is required. > > > > > > At the server > > > >

Re: [Dnsmasq-discuss] dnsmasq 2.78 is failing to respond to dhcpv6 requests forwarded via relay agent

2019-01-04 Thread Sandeep K M
Hi, Here are the output of the commands: root@8320:~# *ip -6 addr* 49: m1s1p7: mtu 1500 state UNKNOWN qlen 1000 inet6 1040::2/120 scope global valid_lft forever preferred_lft forever inet6 fe80::480f:cf00:7af:8444/64 scope link valid_lft forever preferred_lft forever

Re: [Dnsmasq-discuss] dnsmasq 2.78 is failing to respond to dhcpv6 requests forwarded via relay agent

2019-01-04 Thread Geert Stappers
On Fri, Jan 04, 2019 at 11:55:49AM +0530, Sandeep K M wrote: > Attached are the packet captures: > > 1. Packets exchanged between client and relay (client-relay.pcap) > 2. Packets exchanged between relay and server (relay-server.pcap) > 3. strace of dnsmasq (dnsmasq.trace) > > Please let me

Re: [Dnsmasq-discuss] dnsmasq 2.78 is failing to respond to dhcpv6 requests forwarded via relay agent

2019-01-03 Thread Sandeep K M
Hi Simon, Thanks a lot for your prompt reply. Attached are the packet captures: 1. Packets exchanged between client and relay (client-relay.pcap) 2. Packets exchanged between relay and server (relay-server.pcap) 3. strace of dnsmasq (dnsmasq.trace) Please let me know if any other information

Re: [Dnsmasq-discuss] dnsmasq 2.78 is failing to respond to dhcpv6 requests forwarded via relay agent

2019-01-03 Thread Simon Kelley
It would be useful to get full packet dumps rather than just tcpdump output. It would also be useful to run dnsmasq under strace and see what syscalls it's making: that would tell use where the reply might be going. Cheers, Simon. On 03/01/2019 07:41, Sandeep K M wrote: > Hi All, > >   >