[Dnsmasq-discuss] DNSMASQ Not Sending ACK?

[Jason Kary]

Hi Chris,

I cloned the GIT repository and tested with version 2.78test2-gb697fbb 

I’m still seeing the server fail to respond to the request message:

Frame 40189 (388 bytes on wire, 388 bytes captured)
   Arrival Time: Sep 25, 2017 20:59:01.142813000
   [Time delta from previous captured frame: 0.000646000 seconds]
   [Time delta from previous displayed frame: 0.000646000 seconds]
   [Time since reference or first frame: 149.170698000 seconds]
   Frame Number: 40189
   Frame Length: 388 bytes
   Capture Length: 388 bytes
   [Frame is marked: False]
   [Protocols in frame: eth:ip:udp:bootp]
Ethernet II, Src: 58:ac:78:b1:38:e1 (58:ac:78:b1:38:e1), Dst: 00:0c:29:cf:10:0b (00:0c:29:cf:10:0b)
   Destination: 00:0c:29:cf:10:0b (00:0c:29:cf:10:0b)
       Address: 00:0c:29:cf:10:0b (00:0c:29:cf:10:0b)
       .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
       .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
   Source: 58:ac:78:b1:38:e1 (58:ac:78:b1:38:e1)
       Address: 58:ac:78:b1:38:e1 (58:ac:78:b1:38:e1)
       .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
       .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
   Type: IP (0x0800)
Internet Protocol, Src: 33.33.33.33 (33.33.33.33), Dst: 10.168.101.20 (10.168.101.20)
   Version: 4
   Header length: 20 bytes
   Differentiated Services Field: 0x10 (DSCP 0x04: Unknown DSCP; ECN: 0x00)
       0001 00.. = Differentiated Services Codepoint: Unknown (0x04)
       .... ..0. = ECN-Capable Transport (ECT): 0
       .... ...0 = ECN-CE: 0
   Total Length: 374
   Identification: 0xbd9b (48539)
   Flags: 0x00
       0.. = Reserved bit: Not Set
       .0. = Don't fragment: Not Set
       ..0 = More fragments: Not Set
   Fragment offset: 0
   Time to live: 255
   Protocol: UDP (0x11)
   Header checksum: 0x4acd [correct]
       [Good: True]
       [Bad : False]
   Source: 33.33.33.33 (33.33.33.33)
   Destination: 10.168.101.20 (10.168.101.20)
User Datagram Protocol, Src Port: bootps (67), Dst Port: bootps (67)
   Source port: bootps (67)
   Destination port: bootps (67)
   Length: 354
   Checksum: 0x95d3 [validation disabled]
       [Good Checksum: False]
       [Bad Checksum: False]
Bootstrap Protocol
   Message type: Boot Request (1)
   Hardware type: Ethernet
   Hardware address length: 6
   Hops: 1
   Transaction ID: 0x21696b65
   Seconds elapsed: 0
   Bootp flags: 0x0000 (Unicast)
       0... .... .... .... = Broadcast flag: Unicast
       .000 0000 0000 0000 = Reserved flags: 0x0000
   Client IP address: 0.0.0.0 (0.0.0.0)
   Your (client) IP address: 0.0.0.0 (0.0.0.0)
   Next server IP address: 0.0.0.0 (0.0.0.0)
   Relay agent IP address: 33.33.33.33 (33.33.33.33)
   Client MAC address: 00:0c:29:65:e0:ea (00:0c:29:65:e0:ea)
   Client hardware address padding: 00000000000000000000
   Server host name not given
   Boot file name not given
   Magic cookie: (OK)
   Option: (t=53,l=1) DHCP Message Type = DHCP Request
       Option: (53) DHCP Message Type
       Length: 1
       Value: 03
   Option: (t=54,l=4) DHCP Server Identifier = 10.168.101.20
       Option: (54) DHCP Server Identifier
       Length: 4
       Value: 0AA86514
   Option: (t=50,l=4) Requested IP Address = 10.168.102.128
       Option: (50) Requested IP Address
       Length: 4
       Value: 0AA86680
   Option: (t=55,l=18) Parameter Request List
       Option: (55) Parameter Request List
       Length: 18
       Value: 011C02790F060C28292A1A770379F921FC2A
       1 = Subnet Mask
       28 = Broadcast Address
       2 = Time Offset
       121 = Classless Static Route
       15 = Domain Name
       6 = Domain Name Server
       12 = Host Name
       40 = Network Information Service Domain
       41 = Network Information Service Servers
       42 = Network Time Protocol Servers
       26 = Interface MTU
       119 = Domain Search [TODO]
       3 = Router
       121 = Classless Static Route
       249 = Private/Classless Static Route (Microsoft)
       33 = Static Route
       252 = Private/Proxy autodiscovery
       42 = Network Time Protocol Servers
   Option: (t=82,l=44) Agent Information Option
       Option: (82) Agent Information Option
       Length: 44
       Value: 010A01080006004C4F2A002F020658AC78B138E1970A0062...
       Agent Circuit ID: 01080006004C4F2A002F
       Agent Remote ID: 58AC78B138E1
       DHCPv4 Virtual Subnet Selection: 006262742D76786C616E
       Server Identifier Override: 0AA86601
       Link selection: 10.168.102.0
   End Option
   Padding




Pls find my dnsmasq.conf as follows:



Take Care
Jason



> On Sep 25, 2017, at 4:10 PM, Jason Kary (jkary) <jkary at cisco.com> wrote:
> 
> Hi,
> 
> Pls find my dnsmasq.conf as follows:
> 
> <PastedGraphic-1.tiff>
> 
> Take Care
> Jason
> 
>> On Sep 22, 2017, at 5:10 PM, Chris Novakovic <chris at chrisn.me.uk <mailto:chris at chrisn.me.uk>> wrote:
>> 
>> On 22/09/2017 19:24, Jason Kary (jkary) wrote:
>>> Thank you for the update.  We are running version 2.66
>> 
>> 2.66 is four and a half years old now, and those parts of the codebase
>> have been overhauled quite a lot since then --- is there any way you can
>> test your setup with 2.77 plus the patch in [2] from my initial reply
>> (or, better still, master/HEAD in the git repository)? Also, it'd be
>> helpful if you could post your full dnsmasq configuration.
> 

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