[SR-Users] Problem with callid as htable key

[Daniel-Constantin Mierla]

If no operator is matched in the first two characters of expression part
for $shtcn(...), then regexp is used. That's because initially the
$shtcn() was doing only regexp matching, later it was added support for
additional operators.

Yes, == is the operator for equal.

Cheers,
Daniel


On 16.10.18 11:53, jenus at cyberchaos.nl wrote:
> Daniel,
>
> Ok so if i'm correct i can prefix the callid with for example 1234 to
> avoid matching the eq. In other words eq will only match the regex
> code if the callid string starts with it?
>
> And by mathing on equal you mean:  $shtcn(ht_test=>==$var(htid)) ?
>
> Thanks,
>
> Jan
>
> Daniel-Constantin Mierla schreef op 2018-10-16 10:16:
>> Just to add that regexp matching when using keys from the sip message
>> such as call-id is exposed further to some issues -- for example, it is
>> common to have . (dot) in call-id, which for a regexp is matching any
>> char, so a call id having 123.456 is matching 123x456. So depending on
>> what you want to count, might be better to match by equal or prefix
>> rules.
>>
>> Cheers,
>> Daniel
>>
>> On 16.10.18 10:03, jenus at cyberchaos.nl wrote:
>>> Daniel,
>>>
>>> Thanks for the quick response, that indeed solves my problem.
>>>
>>>
>>> Jan
>>>
>>> Daniel-Constantin Mierla schreef op 2018-10-16 09:55:
>>>> Hello,
>>>>
>>>> the expression in the $shtcn(table=>exp) can have some operators at
>>>> the
>>>> beginning, see:
>>>>
>>>>   -
>>>> https://www.kamailio.org/wiki/cookbooks/devel/pseudovariables#shtcn_htable_exp
>>>>
>>>>
>>>>
>>>> So, eq is one of them, the safest is to explicitly set the operator if
>>>> you cannot predict what is the key, like in this case. If the operator
>>>> is missing, then the exp is matched as regular expression, so you can
>>>> do:
>>>>
>>>> $shtcn(ht_test=>~~$var(htid))
>>>>
>>>> Cheers,
>>>> Daniel
>>>>
>>>>
>>>> On 16.10.18 09:47, jenus at cyberchaos.nl wrote:
>>>>> Hello,
>>>>>
>>>>> I'm running kamailio 5.1.4 and running into a issue with htable. I
>>>>> use
>>>>> it to store some dialog data so i can use it in a http route. When i
>>>>> use the callid as a key it creates a issue for callid's starting with
>>>>> eq. Here some example code that i use to reproduce the issue:
>>>>>
>>>>>
>>>>> modparam("htable", "htable", "ht_test=>size=16;autoexpire=10")
>>>>>
>>>>> $var(htable-val) = $_s($dlg(h_entry)) + "::" + $_s($dlg(h_id)) + "::"
>>>>> + $Ts;
>>>>> xlog("L_WARN", "HT_TEST: Adding $var(htable-val) to ht_test with key
>>>>> eq1234");
>>>>> $var(htid) = "eq1234";
>>>>> $sht(ht_test=>$var(htid)) =  $var(htable-val);
>>>>> $var(htable-val) = $null;
>>>>>
>>>>> if ($shtcn(ht_test=>$var(htid)) > 0)
>>>>> {
>>>>>        xlog("L_WARN", "HT_TEST: Key eq1234 found!");
>>>>> } else {
>>>>>        xlog("L_WARN", "HT_TEST: Key eq1234 NOT found!");
>>>>> }
>>>>> $var(htid) = $null;
>>>>>
>>>>> Results in :
>>>>>
>>>>> Oct 16 09:36:31 sip03 /usr/sbin/kamailio[22344]: WARNING: <script>:
>>>>> HT_TEST: Adding 531::926::1539675391 to ht_test with key eq1234
>>>>> Oct 16 09:36:31 sip03 /usr/sbin/kamailio[22344]: WARNING: <script>:
>>>>> HT_TEST: Key eq1234 NOT found!
>>>>>
>>>>>
>>>>> When i prefix eq with a 1 it works fine:
>>>>>
>>>>> modparam("htable", "htable", "ht_test=>size=16;autoexpire=10")
>>>>>
>>>>> $var(htable-val) = $_s($dlg(h_entry)) + "::" + $_s($dlg(h_id)) + "::"
>>>>> + $Ts;
>>>>> xlog("L_WARN", "HT_TEST: Adding $var(htable-val) to ht_test with key
>>>>> eq1234");
>>>>> $var(htid) = "1eq1234";
>>>>> $sht(ht_test=>$var(htid)) =  $var(htable-val);
>>>>> $var(htable-val) = $null;
>>>>>
>>>>> if ($shtcn(ht_test=>$var(htid)) > 0)
>>>>> {
>>>>>        xlog("L_WARN", "HT_TEST: Key eq1234 found!");
>>>>> } else {
>>>>>        xlog("L_WARN", "HT_TEST: Key eq1234 NOT found!");
>>>>> }
>>>>> $var(htid) = $null;
>>>>>
>>>>> Results in:
>>>>>
>>>>> Oct 16 09:37:25 sip03 /usr/sbin/kamailio[22555]: WARNING: <script>:
>>>>> HT_TEST: Adding 3050::1098::1539675445 to ht_test with key eq1234
>>>>> Oct 16 09:37:25 sip03 /usr/sbin/kamailio[22555]: WARNING: <script>:
>>>>> HT_TEST: Key eq1234 found!
>>>>>
>>>>>
>>>>> Am i running into a bug? Or are there some restrictions on the
>>>>> key's i
>>>>> can use? I'm still going trough the logs to check if there are more
>>>>> callid's that have a issue with matching.
>>>>>
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Jan Hazenberg
>>>>>
>>>>> _______________________________________________
>>>>> Kamailio (SER) - Users Mailing List
>>>>> sr-users at lists.kamailio.org
>>>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>
>

-- 
Daniel-Constantin Mierla -- www.asipto.com
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