[Olsr-dev] Olsrd v0.9.5 and plugin jsoninfo
Ufo
(spam-protected)
Thu Dec 22 17:10:52 CET 2016
after some more tests with tcpdump:
starting such a telnet session will stop the device sending olsr-packets
(tcp698). so olsr is hanging (without a crash)
typing in "/routes" brings a "403 Forbidden", and olsr-packets were
reavaken.
or you can wait some minutes, and olsr+plugin-telnet-connection will be
killed by olsr-watchdog.
On 22.12.2016 16:27, Ufo wrote:
> Konsole output
> i also tried to crash olsr. (on LEDE trunk from yesterday) but i think
> its some kind of hanging-process/deniel-of-service-attack instead of a
> code-crash.
> olsr will restart (due to olsr-watchdog) and doesnt have a
> dump/core-file for gdb for me
>
> > Dec 22 14:50:00 2016 user.notice OLSR watchdog: Process died -
> restarting!
> > [ 1369.947516] TCP: request_sock_TCP: Possible SYN flooding on port 9090. Sending cookies. Check SNMP
> counters.
>
> problem: a telnet connect to jsonplugin (also from outside of the
> device) will deny/halt/stop all other jsonplugin-calls. if you then
> wait too long the olsr-watchdog will cause a olsr-restart. sp2ong,
> please have a look in dmesg/logread for such messages.
>
> at doku (http://www.olsr.org/?q=jsoninfo_plugin) i read
>
> "If no address is specified, then localhost (127.0.0.1) is allowed by
> default."
>
> but that doesnt seems to work any more!? On my testdevice there are no
> PlParams for jsonplugin, BUT i can make telnet/nc connection from
> outside/other meshnodes. when i ask for "/routes" a message appears
> "403 Forbidden". the port is open, and one connection to that will
> block/dos the jsonplugin.
>
>
> mfg ufo
>
>
>
> On 22.12.2016 09:50, Ferry Huberts wrote:
>> It all works for me, on Linux with glibc
>>
>> I really need a backtrace to be able determine what is going on.
>> Run olsrd under gdb please to generate a backtrace.
>>
>> On 22/12/16 09:47, (spam-protected) wrote:
>>> I have check similar txtinfo plugin use telnet command and when I have
>>> request /rou and /lin all information were showed and OLSRD process
>>> not crash
>>>
>>> 2016-12-22 9:44 GMT+01:00 <(spam-protected)>:
>>>> Hi
>>>>
>>>> I know this information about scripts from changelog but I have tray
>>>> get manually information from jsonplugin use simple unix command
>>>>
>>>> echo /routes | nc 127.0.0.0.1 9090
>>>>
>>>> where 9090 is port for jsonplugin and when I have ask plugin jsoninfo
>>>> about 'routes' OLSRD process crash
>>>>
>>>> I can do similar use telnet command:
>>>>
>>>> telnet 127.0.0.1 9090
>>>>
>>>> and when next send command /mid all information is showed but when I
>>>> have send command in telnet session /routes main OLSRD process crash
>>>>
>>>> If I send bad command to jsoninfo I have proper info about invalid
>>>> requests :
>>>> telnet 127.0.0.1 9090
>>>> /lin
>>>> HTTP/1.1 404 Not Found
>>>> Date: Thu, 22 Dec 2016 08:39:05 GMT
>>>> Server: OLSRD JSONINFO
>>>> Connection: close
>>>> Content-Type: application/vnd.api+json
>>>> Access-Control-Allow-Origin: *
>>>> Access-Control-Allow-Methods: GET, POST, OPTIONS
>>>> Access-Control-Allow-Headers: Accept, Origin, X-Requested-With
>>>> Access-Control-Max-Age: 1728000
>>>> Content-Length: 0
>>>> Cache-Control: no-cache
>>>>
>>>> When I have send correct request like /mid I receive all iformation:
>>>>
>>>> telnet 127.0.0.1 9090
>>>> /mid
>>>> HTTP/1.1 200 OK
>>>> Date: Thu, 22 Dec 2016 08:41:24 GMT
>>>> Server: OLSRD JSONINFO
>>>> Connection: close
>>>> Content-Type: application/vnd.api+json
>>>> Access-Control-Allow-Origin: *
>>>> Access-Control-Allow-Methods: GET, POST, OPTIONS
>>>> Access-Control-Allow-Headers: Accept, Origin, X-Requested-With
>>>> Access-Control-Max-Age: 1728000
>>>> Content-Length: 465
>>>> Cache-Control: no-cache
>>>>
>>>> {"pid": 27325,"systemTime":
>>>> .....
>>>>
>>>>
>>>> but when I have try use /links or /routes not inforation and OLSRD
>>>> stop working and it lis look like crash process because I must again
>>>> restart olsrd
>>>>
>>>> telnet 127.0.0.1 9090
>>>> /links
>>>> Connection closed by foreign host
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> 2016-12-22 9:18 GMT+01:00 Ferry Huberts <(spam-protected)>:
>>>>>
>>>>>
>>>>> On 22/12/16 09:10, (spam-protected) wrote:
>>>>>> After success compile olsrd 0.9.5 I have update package on my
>>>>>> openwrt router
>>>>>> I have use plug-in jsoninfo to get information 'links' and 'routes'
>>>>>> use following command:
>>>>>>
>>>>>> echo /links | nc 127.0.0.1 9090
>>>>>>
>>>>>> Now after upgrade to v0.9.5 plugin jsoninfo crash olsrd when I have
>>>>>
>>>>> Please provide your commands and the backtrace.
>>>>>
>>>>> Also - from the changelog - read this:
>>>>>
>>>>> Note: The txtinfo and jsoninfo plugins were 'merged' to use a common
>>>>> codebase for receiving requests and dispatching replies. Also,
>>>>> these plugins were subjected to review and fixes. As a result:
>>>>> - request handling has become much stricter, e.g. a txtinfo
>>>>> request '/links' will no longer work since the correct
>>>>> request is
>>>>> (and has always been) '/lin'.
>>>>> - some fixes change the format and/or content of txtinfo and/or
>>>>> jsoninfo output. An example is the txtinfo output of the
>>>>> request
>>>>> '/mid' when 'vtime' is enabled on txtinfo; this has been
>>>>> broken
>>>>> since the end of 2009 (c555a44).
>>>>> - invalid requests will return HTTP error status code
>>>>> "Not Found" (404) when HTTP headers are enabled, and report
>>>>> an error in the output when they are not enabled.
>>>>> - requests without output will return HTTP error status code
>>>>> "No Content" (204) when HTTP headers are enabled, and report
>>>>> an error in the output when they are not enabled.
>>>>>
>>>>> It is VERY strongly advised to check your scripts and
>>>>> applications
>>>>> interfacing with olsrd txtinfo and/or jsoninfo before switching
>>>>> to this version of olsrd.
>>>>>
>>>>>
>>>>>> use check following
>>>>>> parameters
>>>>>>
>>>>>> links
>>>>>> routes
>>>>>> topology
>>>>>> interfaces
>>>>>>
>>>>>> when I have check following parameters
>>>>>>
>>>>>> hna
>>>>>> gateways
>>>>>> mid
>>>>>> neighbors
>>>>>> 2hop
>>>>>> sgw
>>>>>>
>>>>>> I have information from jsoninfo and olsrd not crash
>>>>>>
>>>>>> I have check olsrd 0.9.5 compiled and running on debian all
>>>>>> working OK
>>>>>> but under openwrt
>>>>>> crash process when I want to get information about links and routes
>>>>>>
>>>>>> Anybody have similar problems with olsrd 0.9.5 running under
>>>>>> openwrt ????
>>>>>>
>>>>>> Regards
>>>>>>
>>>>>> Waldek
>>>>>>
>>>>>
>>>>> --
>>>>> Ferry Huberts
>>>>>
>>
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.olsr.org/pipermail/olsr-dev/attachments/20161222/7405c6d2/attachment.html>
More information about the Olsr-dev
mailing list