[SR-Users] Intermittent error seen when using a python script in kamailio
Wojciech Kopciewicz
wojciech.kopciewicz at motorolasolutions.com
Wed Apr 6 16:12:44 CEST 2022
Daniel,
I am not sure if this enough but here are the changes that need to be done
to have a basic test bed working:
*kamailio.cfg*:
loadmodule "app_python3.so"
modparam("app_python3", "load", "/etc/kamailio/kamailio.py")
route {
if (is_method("INVITE")) {
python_exec("display_headers")
}
}
*kamailio.py*:
import KSR as KSR
def mod_init():
KSR.xlog.xdbg("Python mod init.\n")
return kamailio()
class kamailio:
def __init__(self):
KSR.xlog.xdbg("kamailio.__init__\n")
def child_init(self, _):
return 0
def display_headers(self, _):
KSR.xlog.xdbg("display_headers\n")
header_name = "Geolocation"
if KSR.hdr.is_present(header_name):
i = 0
header_value = KSR.hdr.get_idx(header_name, i)
while header_value:
KSR.xlog.xdbg("Found header value: {0} for header {1}
\n".format(header_value, header_name))
i += 1
header_value = KSR.hdr.get_idx(header_name, i)
And your INVITE message then needs to have a Geolocation header. Something
like: Geolocation: <cid:target123 at atlanta.example.com>
Of course the header name shouldn't matter as long as it is in the INVITE.
Please let me know if this is enough or I should prepare something more.
I am currently also evaluating lua script for the same purpose to see if
the same error is observed.
Pozdrawiam / Best regards,
Wojtek
On Mon, Apr 4, 2022 at 5:11 PM Daniel-Constantin Mierla <miconda at gmail.com>
wrote:
> I am not using Python module myself, although I helped adding Kemi support
> to it. It is not easy for me to create a testbed and try to reproduce.
> Maybe you can create a minimal config and a sipp scenario that can
> reproduce it. That could help the non-python developers to troubleshoot.
>
> Cheers,
> Daniel
> On 01.04.22 15:40, Wojciech Kopciewicz wrote:
>
> Any thoughts on this?
>
> Pozdrawiam / Best regards,
> Wojtek
>
>
> On Fri, Feb 25, 2022 at 9:30 AM Wojciech Kopciewicz <
> wojciech.kopciewicz at motorolasolutions.com> wrote:
>
>> Hi Daniel,
>>
>> This is still a development setup so the traffic is very small - a few
>> calls a day.
>> It seems that the issue can be seen during first calls after some
>> inactivity.
>>
>> Pozdrawiam / Best regards,
>> Wojtek
>>
>>
>> On Wed, Feb 23, 2022 at 2:11 PM Daniel-Constantin Mierla <
>> miconda at gmail.com> wrote:
>>
>>> Hello,
>>>
>>> how often they show up and is there high volume of traffic at that
>>> moment?
>>>
>>> Cheers,
>>> Daniel
>>> On 23.02.22 11:44, Wojciech Kopciewicz wrote:
>>>
>>> Hi,
>>>
>>> Yes, those values are hard-coded strings.
>>>
>>> Pozdrawiam / Best regards,
>>> Wojtek
>>>
>>>
>>> On Wed, Feb 23, 2022 at 8:25 AM Daniel-Constantin Mierla <
>>> miconda at gmail.com> wrote:
>>>
>>>> Hello,
>>>>
>>>> do you check that header_name parameter set for KSR.hdr.is_present() is
>>>> a string value?
>>>>
>>>> Cheers,
>>>> Daniel
>>>> On 22.02.22 15:36, Wojciech Kopciewicz wrote:
>>>>
>>>> Hi,
>>>>
>>>> Intermittently we are observing the following error when checking if
>>>> given header is present in SIP INVITE:
>>>>
>>>> SystemError: returned a result with an error set
>>>>
>>>> The complete stack trace is (some names redacted):
>>>> 11(28) ERROR: {1 195 INVITE nMHZDN.10nOIDt4ldOwz5cqz0XnMepA9}
>>>> app_python3 [python_support.c:156]: python_handle_exception(): apy_exec:
>>>> modify_headers((null)): Unhandled exception in the Python code:
>>>> TypeError: an integer is required (got type NoneType)
>>>>
>>>> The above exception was the direct cause of the following exception:
>>>>
>>>> Traceback (most recent call last):
>>>> File "/etc/kamailio/kamailio.py", line 25, in modify_headers
>>>> self.modify_header("SomeHeader")
>>>> File "/etc/kamailio/kamailio.py", line 29, in modify_header
>>>> present = KSR.hdr.is_present(header_name)
>>>> SystemError: returned a result with an error set
>>>>
>>>> Kamailio version (kamailio -v output):
>>>>
>>>> version: kamailio 5.4.6 (x86_64/linux)
>>>>
>>>> flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS,
>>>> DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC,
>>>> F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT,
>>>> USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST,
>>>> HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED
>>>> ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE
>>>> 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
>>>> poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
>>>> id: unknown
>>>> compiled with gcc 8.3.0
>>>>
>>>> Operation system: Linux kamailio-5c7484c74d-vhhr8 5.4.0-1056-azure
>>>> #58~18.04.1-Ubuntu SMP Wed Jul 28 23:14:18 UTC 2021 x86_64 GNU/Linux
>>>>
>>>> Are you able to help me find the root cause of this issue?
>>>> Pozdrawiam / Best regards,
>>>> Wojtek
>>>>
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>>>> Mar 28-31, 2022 (Europe Timezone)
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>>>>
>>>>
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>>>
>>>
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> Daniel-Constantin Mierla -- www.asipto.com <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.asipto.com&d=DwMDaQ&c=q3cDpHe1hF8lXU5EFjNM_C93KOmcBXCBnhee2v6PYlc&r=RsXkMe6sb2-9yHQUV8KP4MrUtS9gOAiWNJa5xB5cLRjcZVaHW3sjBwy6Fjb928KS&m=7f7ha9mv9FqaXQl7YDrolyTf6u0qXf_Xy0QsyrFzYGI-oydX8xl3Q_RxW-TqgdKj&s=ieimCnXayPj97QoLqV7DQJw3DxyWUNw5ouY9vdLm-HI&e=>www.twitter.com/miconda <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.twitter.com_miconda&d=DwMDaQ&c=q3cDpHe1hF8lXU5EFjNM_C93KOmcBXCBnhee2v6PYlc&r=RsXkMe6sb2-9yHQUV8KP4MrUtS9gOAiWNJa5xB5cLRjcZVaHW3sjBwy6Fjb928KS&m=7f7ha9mv9FqaXQl7YDrolyTf6u0qXf_Xy0QsyrFzYGI-oydX8xl3Q_RxW-TqgdKj&s=PaDna9XJjLOUUjIER9zqaBkWszk00ERoK6fVY0gQ9wc&e=> -- www.linkedin.com/in/miconda <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.linkedin.com_in_miconda&d=DwMDaQ&c=q3cDpHe1hF8lXU5EFjNM_C93KOmcBXCBnhee2v6PYlc&r=RsXkMe6sb2-9yHQUV8KP4MrUtS9gOAiWNJa5xB5cLRjcZVaHW3sjBwy6Fjb928KS&m=7f7ha9mv9FqaXQl7YDrolyTf6u0qXf_Xy0QsyrFzYGI-oydX8xl3Q_RxW-TqgdKj&s=ADcQ_IBCkfhVTfgAo8I2qkqkD0v-LsleY2Sk6rSDDdM&e=>
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> March 28-31, 2022 (Europe Timezone)
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