Thanks for your response, Lenhart
I don't think that is a firewall problem. I'm capturing mDNS frames when
executing the app that is publishing (attached).
It's the event loop suposed to 're-publish' the services to avoid timeouts?
Regards,
Lennart Poettering escribió:
On Thu, 06.05.10 09:20, "Victor M. Palacio Tárrega"
([email protected]) wrote:
Hello All,
I'm developing an embedded application with mDNS.
Using example from client-publish-service.c works fine, but, after
some time I get this with the services browser instead of TXT data:
*Error: org.freedesktop.Avahi.TimeoutError: Timeout reached*
I'm having the same problem with every service that is present in
/etc/avahi/services.
This sounds as if mDNS packets are not properly delivered. This might be
because you run a firewall that drops packets somewhere or your driver
does not do multicasting properly.
Lennart
No. Time Source Destination Protocol Info
1 0.000000 192.168.1.202 224.0.0.251 MDNS
Standard query ANY SlimAccess CAN Manager._sftp-ssh._tcp.local, "QM" question
Frame 1 (189 bytes on wire, 189 bytes captured)
Ethernet II, Src: Ka-RoEle_74:74:6d (00:0c:c6:74:74:6d), Dst:
IPv4mcast_00:00:fb (01:00:5e:00:00:fb)
Internet Protocol, Src: 192.168.1.202 (192.168.1.202), Dst: 224.0.0.251
(224.0.0.251)
User Datagram Protocol, Src Port: mdns (5353), Dst Port: mdns (5353)
Source port: mdns (5353)
Destination port: mdns (5353)
Length: 155
Checksum: 0x276c [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Domain Name System (query)
No. Time Source Destination Protocol Info
2 0.259934 192.168.1.202 224.0.0.251 MDNS
Standard query ANY SlimAccess CAN Manager._sftp-ssh._tcp.local, "QM" question
Frame 2 (189 bytes on wire, 189 bytes captured)
Ethernet II, Src: Ka-RoEle_74:74:6d (00:0c:c6:74:74:6d), Dst:
IPv4mcast_00:00:fb (01:00:5e:00:00:fb)
Internet Protocol, Src: 192.168.1.202 (192.168.1.202), Dst: 224.0.0.251
(224.0.0.251)
User Datagram Protocol, Src Port: mdns (5353), Dst Port: mdns (5353)
Source port: mdns (5353)
Destination port: mdns (5353)
Length: 155
Checksum: 0x276c [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Domain Name System (query)
No. Time Source Destination Protocol Info
3 0.519850 192.168.1.202 224.0.0.251 MDNS
Standard query ANY SlimAccess CAN Manager._sftp-ssh._tcp.local, "QM" question
Frame 3 (189 bytes on wire, 189 bytes captured)
Ethernet II, Src: Ka-RoEle_74:74:6d (00:0c:c6:74:74:6d), Dst:
IPv4mcast_00:00:fb (01:00:5e:00:00:fb)
Internet Protocol, Src: 192.168.1.202 (192.168.1.202), Dst: 224.0.0.251
(224.0.0.251)
User Datagram Protocol, Src Port: mdns (5353), Dst Port: mdns (5353)
Source port: mdns (5353)
Destination port: mdns (5353)
Length: 155
Checksum: 0x276c [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Domain Name System (query)
No. Time Source Destination Protocol Info
4 0.723214 192.168.1.202 224.0.0.251 MDNS
Standard query response TXT, cache flush PTR SlimAccess CAN
Manager._sftp-ssh._tcp.local SRV, cache flush 0 0 22 xmovecore0002.local A,
cache flush 192.168.1.202 PTR _sftp-ssh._tcp.local
Frame 4 (250 bytes on wire, 250 bytes captured)
Ethernet II, Src: Ka-RoEle_74:74:6d (00:0c:c6:74:74:6d), Dst:
IPv4mcast_00:00:fb (01:00:5e:00:00:fb)
Internet Protocol, Src: 192.168.1.202 (192.168.1.202), Dst: 224.0.0.251
(224.0.0.251)
User Datagram Protocol, Src Port: mdns (5353), Dst Port: mdns (5353)
Source port: mdns (5353)
Destination port: mdns (5353)
Length: 216
Checksum: 0x9727 [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Domain Name System (response)
No. Time Source Destination Protocol Info
5 0.824996 192.168.1.37 224.0.0.251 MDNS
Standard query AAAA xmovecore0002.local, "QM" question
Frame 5 (79 bytes on wire, 79 bytes captured)
Ethernet II, Src: HewlettP_16:dd:c4 (00:22:64:16:dd:c4), Dst:
IPv4mcast_00:00:fb (01:00:5e:00:00:fb)
Internet Protocol, Src: 192.168.1.37 (192.168.1.37), Dst: 224.0.0.251
(224.0.0.251)
User Datagram Protocol, Src Port: mdns (5353), Dst Port: mdns (5353)
Source port: mdns (5353)
Destination port: mdns (5353)
Length: 45
Checksum: 0xa307 [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Domain Name System (query)
No. Time Source Destination Protocol Info
6 1.782549 192.168.1.202 224.0.0.251 MDNS
Standard query response TXT, cache flush PTR SlimAccess CAN
Manager._sftp-ssh._tcp.local SRV, cache flush 0 0 22 xmovecore0002.local A,
cache flush 192.168.1.202 PTR _sftp-ssh._tcp.local
Frame 6 (250 bytes on wire, 250 bytes captured)
Ethernet II, Src: Ka-RoEle_74:74:6d (00:0c:c6:74:74:6d), Dst:
IPv4mcast_00:00:fb (01:00:5e:00:00:fb)
Internet Protocol, Src: 192.168.1.202 (192.168.1.202), Dst: 224.0.0.251
(224.0.0.251)
User Datagram Protocol, Src Port: mdns (5353), Dst Port: mdns (5353)
Source port: mdns (5353)
Destination port: mdns (5353)
Length: 216
Checksum: 0x9727 [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Domain Name System (response)
No. Time Source Destination Protocol Info
7 1.825795 192.168.1.37 224.0.0.251 MDNS
Standard query AAAA xmovecore0002.local, "QM" question
Frame 7 (79 bytes on wire, 79 bytes captured)
Ethernet II, Src: HewlettP_16:dd:c4 (00:22:64:16:dd:c4), Dst:
IPv4mcast_00:00:fb (01:00:5e:00:00:fb)
Internet Protocol, Src: 192.168.1.37 (192.168.1.37), Dst: 224.0.0.251
(224.0.0.251)
User Datagram Protocol, Src Port: mdns (5353), Dst Port: mdns (5353)
Source port: mdns (5353)
Destination port: mdns (5353)
Length: 45
Checksum: 0xa307 [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Domain Name System (query)
No. Time Source Destination Protocol Info
8 3.827041 192.168.1.37 224.0.0.251 MDNS
Standard query AAAA xmovecore0002.local, "QM" question
Frame 8 (79 bytes on wire, 79 bytes captured)
Ethernet II, Src: HewlettP_16:dd:c4 (00:22:64:16:dd:c4), Dst:
IPv4mcast_00:00:fb (01:00:5e:00:00:fb)
Internet Protocol, Src: 192.168.1.37 (192.168.1.37), Dst: 224.0.0.251
(224.0.0.251)
User Datagram Protocol, Src Port: mdns (5353), Dst Port: mdns (5353)
Source port: mdns (5353)
Destination port: mdns (5353)
Length: 45
Checksum: 0xa307 [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Domain Name System (query)
No. Time Source Destination Protocol Info
9 3.842422 192.168.1.202 224.0.0.251 MDNS
Standard query response TXT, cache flush PTR SlimAccess CAN
Manager._sftp-ssh._tcp.local SRV, cache flush 0 0 22 xmovecore0002.local A,
cache flush 192.168.1.202 PTR _sftp-ssh._tcp.local
Frame 9 (250 bytes on wire, 250 bytes captured)
Ethernet II, Src: Ka-RoEle_74:74:6d (00:0c:c6:74:74:6d), Dst:
IPv4mcast_00:00:fb (01:00:5e:00:00:fb)
Internet Protocol, Src: 192.168.1.202 (192.168.1.202), Dst: 224.0.0.251
(224.0.0.251)
User Datagram Protocol, Src Port: mdns (5353), Dst Port: mdns (5353)
Source port: mdns (5353)
Destination port: mdns (5353)
Length: 216
Checksum: 0x9727 [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Domain Name System (response)
No. Time Source Destination Protocol Info
10 7.830628 192.168.1.37 224.0.0.251 MDNS
Standard query AAAA xmovecore0002.local, "QM" question
Frame 10 (79 bytes on wire, 79 bytes captured)
Ethernet II, Src: HewlettP_16:dd:c4 (00:22:64:16:dd:c4), Dst:
IPv4mcast_00:00:fb (01:00:5e:00:00:fb)
Internet Protocol, Src: 192.168.1.37 (192.168.1.37), Dst: 224.0.0.251
(224.0.0.251)
User Datagram Protocol, Src Port: mdns (5353), Dst Port: mdns (5353)
Source port: mdns (5353)
Destination port: mdns (5353)
Length: 45
Checksum: 0xa307 [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Domain Name System (query)
No. Time Source Destination Protocol Info
11 15.838836 192.168.1.37 224.0.0.251 MDNS
Standard query AAAA xmovecore0002.local, "QM" question
Frame 11 (79 bytes on wire, 79 bytes captured)
Ethernet II, Src: HewlettP_16:dd:c4 (00:22:64:16:dd:c4), Dst:
IPv4mcast_00:00:fb (01:00:5e:00:00:fb)
Internet Protocol, Src: 192.168.1.37 (192.168.1.37), Dst: 224.0.0.251
(224.0.0.251)
User Datagram Protocol, Src Port: mdns (5353), Dst Port: mdns (5353)
Source port: mdns (5353)
Destination port: mdns (5353)
Length: 45
Checksum: 0xa307 [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Domain Name System (query)
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