We need to make 2 transformations in URI and To field 1. Convert telephone number to to format E.164 2. To correct a domain part of the address if it is set incorrectly by stupid UA All this is done through set of if operators because every of transformations can be absent or can be done on own algorithm. Let's consider a special case. We have on an input 799111(a)62.33.22.14 and on an output should receive 78142799111(a)voapp.ru URI will be transformed by these commands subst_uri("/^sip:([0-9]+)@(.*)/sip:78142\1@\2/i"); subst_uri("/^sip:([0-9]+)@(.*)/sip:\1@voapp.ru/i"); To field will be transformed by these commands subst("/^To:(.*)sip:([0-9]+)@(.*)/To:\1sip:78142\2@\3/i"); subst("/^To:(.*)sip:([0-9]+)@([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)(.*)/ To:\1sip:\2@voapp.ru\7/i"); We test and get dump of messages using tcpdump We receive from UA INVITE sip:705353@62.33.22.14 SIP/2.0 Via: SIP/2.0/UDP 192.168.13.15 From: ......._1 <sip:gan@192.168.13.15>;tag=22683200-29298-10909 To: <sip:705353@62.33.22.14> ............ We make transformation and sent following: INVITE sip:78142705353@voapp.ru SIP/2.0 Max-Forwards: 10 Record-Route: <sip:62.33.22.14;ftag=22683200-29298-10909;lr> Via: SIP/2.0/UDP voapp.ru:5060;branch=z9hG4bKa4db.e5fa9a02.0 Via: SIP/2.0/UDP 192.168.13.15;rport=53809;received=217.107.59.194 From: ......._1 <sip:gan@192.168.13.15>;tag=22683200-29298-10909 To: <sip:78142705353@62.33.22.14> To: <sip:705353@voapp.ru> ............... As you can see URI was transformed correctly And instead of To field we have 2 To fields everyone corresponding to one of transformations. It is a bug? Or it is feature OpenSER? Whether it is possible to bypass this restriction? I understand that it is possible to make one subst call instead of two calls. subst("/^To:(.*)sip:([0-9]+)@([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)(.*)/ To:\1sip:78142\2@voapp.ru\7/i"); But in a reality the algorithm is much more complex. And that instead of several consecutive transformations to leave one it is required to use a many of if operators. It is very inconvenient, conducts to mistakes and reduces readability of a code. Dmitry _______________________________________________ Users mailing list Users(a)openser.org http://openser.org/cgi-bin/mailman/listinfo/users