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<p class="MsoNormal"><span style="font-size:11.0pt">Please disregard this. I was incorrect about the source of the error message. It is coming from a log statement we have where we are attempting to print the contents of an AVP as a list. In this case the list
is quite long and is causing the buffer exhaustion.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Thanks,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Ben Newlin <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="color:black">From: </span></b><span style="color:black">Ben Newlin <Ben.Newlin@genesys.com><br>
<b>Date: </b>Tuesday, March 13, 2018 at 10:30 AM<br>
<b>To: </b>OpenSIPS users mailling list <users@lists.opensips.org><br>
<b>Subject: </b>pv_get_avp buffer length error<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><a name="_MailOriginalBody"><span style="font-size:11.0pt">Hi,</span><o:p></o:p></a></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt">We have been seeing the following errors in our logs for some time:</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:10.0pt;font-family:Menlo">ERROR:core:pv_get_avp: local buffer length exceeded!</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt">This error prints from multiple places in the code and we were not able to isolate the source until now. I have been able to consistently reproduce the error by
calling avp_insert. It seems to happen every time I call it in a particular place, but I cannot identify the cause of the buffer issue.</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt">Logs from an occurrence are here:
</span></span><a href="https://pastebin.com/HvmrXqii"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt">https://pastebin.com/HvmrXqii</span></span><span style="mso-bookmark:_MailOriginalBody"></span></a><span style="mso-bookmark:_MailOriginalBody"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt">The relevant section of my config script is here:
</span></span><a href="https://pastebin.com/301U1yY2"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt">https://pastebin.com/301U1yY2</span></span><span style="mso-bookmark:_MailOriginalBody"></span></a><span style="mso-bookmark:_MailOriginalBody"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt">I am currently running 1.11.11, which I know is unsupported. But I am trying to determine whether it is an OpenSIPS issue or whether I am using this function in
a way that is not intended.</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt">I am trying to use it to push values onto the end of an AVP stack. According to the docs [1]:</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt">“If the index is greater than the count of values the value will be inserted at the end.”</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt">So I have selected an index that is known to always be greater than the number of elements (32) and am performing the insert at that index. I must do this because
there does not seem to be any way in OpenSIPS to determine the number of values in an AVP except to traverse the entire list. I attempted to keep track of the number of items in the destination list using another variable, but avp_insert will not accept a
variable as the index argument, only a number.</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt">I also tried reading from the source AVP backwards, as opposed to putting them in the destination AVP backwards as I do now, but there is no way to indicate the
last index of an AVP. The common method of using -1 as the index does not work with AVPs.</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt">Any help would be appreciated.</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt">[1]:
</span></span><a href="http://www.opensips.org/html/docs/modules/1.11.x/avpops.html#idp5675600"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt">http://www.opensips.org/html/docs/modules/1.11.x/avpops.html#idp5675600</span></span><span style="mso-bookmark:_MailOriginalBody"></span></a><span style="mso-bookmark:_MailOriginalBody"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt;color:black">Thanks,</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt;color:black"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:11.0pt;color:black">Ben Newlin
</span><o:p></o:p></span></p>
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