#83 UAC module

[Alexei Volkov]

RFC declare that SIP strings (at least From To Remote-Party-Id) can be utf8 encoded, but not all SIP terminals can correctly process that strings when thay are out of latin charset. In this case i want special processing for that uteminals (user-agents). For example i want enaple pass through utf8 for terminals with predefined user agent string and clear or transform for others.

I found the way to do it in branch_route handler instead of route handler (due to more than one terminal can be registered under same URI and they can be from different vendors).

branch_route[1] {
$avp(s:useragent)="";
avp_db_query("select user_agent from location where contact='$ru'","$avp(s:useragent)");
if ($avp(s:useragent)=~"SJphone") {return;};
uac_replace_from("transliterate","");
return;
}

But uac_replace_from in auc.c declared with REQUEST_ROUTE flag only. With attached patch i can solve proplem with some utf8 buggy sip terminals.

I thing that this simple patch will be usefull.

[Alexei Volkov]

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File Added: branch_route_auc.patch

[Alexei Volkov]

patch to make uac_replace_from available in branch_route handler

[Alexei Volkov]

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File Added: branch_route_uac.patch

[Klaus Darilion]

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Hi Alexei!

if you have NATed clients and you use fix_nated_register() then the SQL query is wrong and should be

avp_db_query("select user_agent from location where contact='$ru' and received='$du'","$avp(s:useragent)");

Further, this query is dangerous because of SQL injection, thus you should use transformations (openser >=1.2):

avp_db_query("select user_agent from location where contact='$ru.escape.common' and received='$du'","$avp(s:useragent)");

[Alexei Volkov]

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This patch is obsoleted by bug #1739565 https://sourceforge.net/tracker/index.php?func=detail&aid=1739565&group_id=139143&atid=743020