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      -------- Mensaje original --------
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            <td><a class="moz-txt-link-rfc2396E" href="mailto:sr-users-bounces@lists.sip-router.org"><sr-users-bounces@lists.sip-router.org></a></td>
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            <td><a class="moz-txt-link-rfc2396E" href="mailto:a_villacis@palosanto.com"><a_villacis@palosanto.com></a></td>
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            <td>from palosanto.com by mail.palosanto.com (Dovecot) with
              LMTP id o9JTLusS6VNAYAAA3RMWGw for
              <a class="moz-txt-link-rfc2396E" href="mailto:a_villacis@palosanto.com"><a_villacis@palosanto.com></a>; Mon, 11 Aug 2014
              14:02:20 -0500</td>
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            <td>from localhost (mail.palosanto.com [127.0.0.1]) by
              palosanto.com (Postfix) with ESMTP id DB61213C026F for
              <a class="moz-txt-link-rfc2396E" href="mailto:a_villacis@palosanto.com"><a_villacis@palosanto.com></a>; Mon, 11 Aug 2014
              14:02:20 -0500 (ECT)</td>
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            <td>Debian amavisd-new at mail.palosanto.com</td>
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            <td>-2.159</td>
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            <td>No, score=-2.159 tagged_above=-1000 required=6.31
              tests=[AWL=-0.259, BAYES_00=-1.9] autolearn=ham</td>
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            <td>from palosanto.com ([127.0.0.1]) by localhost
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              <a class="moz-txt-link-rfc2396E" href="mailto:a_villacis@palosanto.com"><a_villacis@palosanto.com></a>; Mon, 11 Aug 2014
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            <td>from <a class="moz-txt-link-abbreviated" href="http://www.kamailio.org">www.kamailio.org</a> (main.kamailio.org
              [193.22.119.66]) by palosanto.com (Postfix) with ESMTPS id
              AAB2813C0276 for <a class="moz-txt-link-rfc2396E" href="mailto:a_villacis@palosanto.com"><a_villacis@palosanto.com></a>; Mon, 11
              Aug 2014 14:02:16 -0500 (ECT)</td>
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            <td>from localhost ([127.0.0.1] helo=main.kamailio.org
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              <a class="moz-txt-link-rfc2396E" href="mailto:sr-users-bounces@lists.sip-router.org"><sr-users-bounces@lists.sip-router.org></a>) id
              1XGurq-00065q-JJ; Mon, 11 Aug 2014 21:02:50 +0200</td>
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            <td>from lab2.palosanto.com ([201.234.196.173]
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              4.72) (envelope-from <a class="moz-txt-link-rfc2396E" href="mailto:a_villacis@palosanto.com"><a_villacis@palosanto.com></a>) id
              1XGuro-000654-FM for <a class="moz-txt-link-abbreviated" href="mailto:sr-users@lists.sip-router.org">sr-users@lists.sip-router.org</a>; Mon,
              11 Aug 2014 21:02:48 +0200</td>
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            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">Received:
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            <td>from localhost (mail.palosanto.com [127.0.0.1]) by
              palosanto.com (Postfix) with ESMTP id D745713C026F for
              <a class="moz-txt-link-rfc2396E" href="mailto:sr-users@lists.sip-router.org"><sr-users@lists.sip-router.org></a>; Mon, 11 Aug 2014
              14:02:04 -0500 (ECT)</td>
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            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">X-Virus-Scanned:
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            <td>Debian amavisd-new at mail.palosanto.com</td>
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            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">Received:
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            <td>from palosanto.com ([127.0.0.1]) by localhost
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              with ESMTP id 6B6_a4ssmARw for
              <a class="moz-txt-link-rfc2396E" href="mailto:sr-users@lists.sip-router.org"><sr-users@lists.sip-router.org></a>; Mon, 11 Aug 2014
              14:02:02 -0500 (ECT)</td>
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            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">Received:
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            <td>from avillacis.palosanto.com (avillacis.palosanto.com
              [192.168.3.2]) by palosanto.com (Postfix) with ESMTPSA id
              8EBDA13C0286 for <a class="moz-txt-link-rfc2396E" href="mailto:sr-users@lists.sip-router.org"><sr-users@lists.sip-router.org></a>;
              Mon, 11 Aug 2014 14:01:33 -0500 (ECT)</td>
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            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">Message-ID:
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            <td><a class="moz-txt-link-rfc2396E" href="mailto:53E91331.50104@palosanto.com"><53E91331.50104@palosanto.com></a></td>
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            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">Date: </th>
            <td>Mon, 11 Aug 2014 14:02:09 -0500</td>
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            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">From: </th>
            <td>Alex Villací­s Lasso <a class="moz-txt-link-rfc2396E" href="mailto:a_villacis@palosanto.com"><a_villacis@palosanto.com></a></td>
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            <td>Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101
              Thunderbird/24.7.0</td>
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            <td>1.0</td>
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            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">To: </th>
            <td><a class="moz-txt-link-abbreviated" href="mailto:sr-users@lists.sip-router.org">sr-users@lists.sip-router.org</a></td>
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            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">References:
            </th>
            <td><a class="moz-txt-link-rfc2396E" href="mailto:53E54348.9090904@palosanto.com"><53E54348.9090904@palosanto.com></a>
              <a class="moz-txt-link-rfc2396E" href="mailto:53E8712A.2050407@gmail.com"><53E8712A.2050407@gmail.com></a></td>
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            <td><a class="moz-txt-link-rfc2396E" href="mailto:53E8712A.2050407@gmail.com"><53E8712A.2050407@gmail.com></a></td>
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            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">Subject:
            </th>
            <td>Re: [SR-Users] How do I make subst_hf() use variables in
              search (not replacement)?</td>
          </tr>
          <tr>
            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">X-BeenThere:
            </th>
            <td><a class="moz-txt-link-abbreviated" href="mailto:sr-users@lists.sip-router.org">sr-users@lists.sip-router.org</a></td>
          </tr>
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            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">X-Mailman-Version:
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            <td>2.1.13</td>
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            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">Precedence:
            </th>
            <td>list</td>
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            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">Reply-To:
            </th>
            <td>Kamailio (SER) - Users Mailing List
              <a class="moz-txt-link-rfc2396E" href="mailto:sr-users@lists.sip-router.org"><sr-users@lists.sip-router.org></a></td>
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            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">List-Id:
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            <td>"Kamailio \(SER\) - Users Mailing List"
              <sr-users.lists.sip-router.org></td>
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            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">List-Unsubscribe:
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            <td><a class="moz-txt-link-rfc2396E" href="http://lists.sip-router.org/cgi-bin/mailman/options/sr-users"><http://lists.sip-router.org/cgi-bin/mailman/options/sr-users></a>,
<a class="moz-txt-link-rfc2396E" href="mailto:sr-users-request@lists.sip-router.org?subject=unsubscribe"><mailto:sr-users-request@lists.sip-router.org?subject=unsubscribe></a></td>
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            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">List-Archive:
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            <td><a class="moz-txt-link-rfc2396E" href="http://lists.sip-router.org/pipermail/sr-users"><http://lists.sip-router.org/pipermail/sr-users></a></td>
          </tr>
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            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">List-Post:
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            <td><a class="moz-txt-link-rfc2396E" href="mailto:sr-users@lists.sip-router.org"><mailto:sr-users@lists.sip-router.org></a></td>
          </tr>
          <tr>
            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">List-Help:
            </th>
            <td><a class="moz-txt-link-rfc2396E" href="mailto:sr-users-request@lists.sip-router.org?subject=help"><mailto:sr-users-request@lists.sip-router.org?subject=help></a></td>
          </tr>
          <tr>
            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">List-Subscribe:
            </th>
            <td><a class="moz-txt-link-rfc2396E" href="http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users"><http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users></a>,
<a class="moz-txt-link-rfc2396E" href="mailto:sr-users-request@lists.sip-router.org?subject=subscribe"><mailto:sr-users-request@lists.sip-router.org?subject=subscribe></a></td>
          </tr>
          <tr>
            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">Content-Transfer-Encoding:
            </th>
            <td>quoted-printable</td>
          </tr>
          <tr>
            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">Content-Type:
            </th>
            <td>text/plain; charset="windows-1252"; Format="flowed"</td>
          </tr>
          <tr>
            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">Sender:
            </th>
            <td><a class="moz-txt-link-abbreviated" href="mailto:sr-users-bounces@lists.sip-router.org">sr-users-bounces@lists.sip-router.org</a></td>
          </tr>
          <tr>
            <th nowrap="nowrap" valign="BASELINE" align="RIGHT">Errors-To:
            </th>
            <td><a class="moz-txt-link-abbreviated" href="mailto:sr-users-bounces@lists.sip-router.org">sr-users-bounces@lists.sip-router.org</a></td>
          </tr>
        </tbody>
      </table>
      <br>
      <br>
      <pre>El 11/08/14 02:30, Daniel-Constantin Mierla escribió:
> I haven't looked at the code, but probably the function doesn't accept variable for the matching regular expression.
>
> If the IP/port of asterisk are not changed, you can try:
>
> #!substdef "/ASTERISKIP/127.0.0.1/"
> #!substdef "/ASTERISKPORT/5080/"
>
> asterisk.bindip = "ASTERISKIP" ...
> asterisk.bindport = ASTERISKPORT ...
>
> subst_hf("Contact", "/ASTERISKIP:ASTERISKPORT/$td/", "a");
>
> Cheers,
> Daniel
>
> On 08/08/14 23:38, Alex Villací­s Lasso wrote:
>> Consider the following snippet:
>>
>> if (is_present_hf("Contact")) {
>>         xlog("L_ALERT", "===== reply to SUBSCRIBE has Contact:$ct\n");
>>         xlog("L_ALERT", "===== want to replace with $td\n");
>>         xlog("L_ALERT", "===== regexp to use is /$sel(cfg_get.asterisk.bindip):$sel(cfg_get.asterisk.bindport)/$td/\n");
>>         if (subst_hf("Contact", "/127.0.0.1:5080/$td/", "a")) {
>>                 xlog("L_ALERT", "===== reply had Contact modified\n");
>>         }
>> }
>>
>> If I use the hardcoded regexp "/127.0.0.1:5080/$td/", subst_hf() replaces the Contact value correctly.
>>
>> However, if I use "/$sel(cfg_get.asterisk.bindip):$sel(cfg_get.asterisk.bindport)/$td/" (where asterisk.bindip and asterisk.bindport are the supposed values 127.0.0.1 and 5080), subst_hf() fails to replace the Contact value.
>>
>> How do I make use of the existing configuration variables in order to substitute in the Contact header?
>>
>> _______________________________________________
>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>> <a class="moz-txt-link-abbreviated" href="mailto:sr-users@lists.sip-router.org">sr-users@lists.sip-router.org</a>
>> <a class="moz-txt-link-freetext" href="http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users">http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users</a>
>
Thanks for the tip.

However, I also have an issue - subst_hf() does not seem to be working. Consider the following route, of which the snippet quoted above is a part:

# manage incoming replies
onreply_route[MANAGE_REPLY] {
        # run rtpproxy resolution
        route(MHOMED_ELASTIX);

        xdbg("incoming reply\n");
        if(status=~"[12][0-9][0-9]")
                route(NATMANAGE);

        if (is_method("SUBSCRIBE") && route(FROMASTERISK)) {
                #xlog("L_ALERT", "===== reply to SUBSCRIBE, coming from asterisk, Call-ID is $ci\n");
                $sht(pending_subscribe=>$ci) = 0;

                if (is_present_hf("Contact")) {
                        xlog("L_ALERT", "===== reply to SUBSCRIBE has Contact: $ct\n");
                        xlog("L_ALERT", "===== want to replace with $td\n");
                        xlog("L_ALERT", "===== regexp to use is /$sel(cfg_get.asterisk.bindip):$sel(cfg_get.asterisk.bindport)/$td/\n");
                        if (subst_hf("Contact", "/127.0.0.1:5080/$td/", "a")) {
                                xlog("L_ALERT", "===== reply hadContact modified\n");
                        }
                }
        }

        # manage websocket reply
        if (nat_uac_test(64)) {
                # Do NAT traversal stuff for replies to a WebSocket connection
                # - even if it is not behind a NAT!
                # This won't be needed in the future if Kamailio and the
                # WebSocket client support Outbound and Path.
                add_contact_alias();
        }
}


When I run this with debug=4, I get the following:

Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [socket_info.c:583]: grep_sock_info(): grep_sock_info - checking if host==us: 9==9 && [127.0.0.1] == [127.0.0.1]
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [dset.c:769]: uri_add_rcv_alias(): encoded <a class="moz-txt-link-rfc2396E" href="mailto:sip:102@127.0.0.1:5080"><sip:102@127.0.0.1:5080></a> => [<a class="moz-txt-link-abbreviated" href="mailto:sip:102@127.0.0.1:5080;alias=127.0.0.1~5080~1">sip:102@127.0.0.1:5080;alias=127.0.0.1~5080~1</a>
]
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [select.c:429]: run_select(): Calling SELECT 0x7f8e431a3d90
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [select.c:429]: run_select(): Calling SELECT 0x7f8e43292ac0
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: htable [ht_var.c:90]:pv_set_ht_cell(): set value for $ht(pending_subscribe=>6a2222bca4cc2be8)
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: ALERT: <script>: ===== reply to SUBSCRIBE has Contact: <a class="moz-txt-link-rfc2396E" href="mailto:sip:102@127.0.0.1:5080"><sip:102@127.0.0.1:5080></a>;expires=3600
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: ALERT: <script>: ===== want to replace with pbx.villacis.com
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [select.c:429]: run_select(): Calling SELECT 0x7f8e431a3d90
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [select.c:429]: run_select(): Calling SELECT 0x7f8e43292ac0
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: ALERT: <script>: ===== regexp to use is /127.0.0.1:5080/pbx.villacis.com/
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [re.c:454]: subst_run(): subst_run: running. r=0
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [re.c:475]: subst_run(): subst_run: matched (9, 14): [127.0.0.1:5080]
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: textops [textops.c:2285]: subst_hf_f(): textops replacing at offset 849 [127.0.0.1:5080] with [pbx.villacis.com]
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: textops [textops.c:2351]: subst_hf_f(): lst was 0x7f8e432e4918
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: ALERT: <script>: ===== reply had Contact modified
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: tm [t_reply.c:1304]: t_should_relay_response(): ->>>>>>>>> T_code=0, new_code=200
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: tm [t_reply.c:1822]: relay_reply(): DEBUG: relay_reply: branch=0, save=0, relay=0 icode=0
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [msg_translator.c:2009]: generate_res_buf_from_sip_res():  old size: 900, new size: 813
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [msg_translator.c:2027]: generate_res_buf_from_sip_res(): copied size: orig:863, new: 776, rest: 37 msg=#012SIP/2.0 200 OK#015#012Via: SIP/2.0/UDP 
192.168.2.100:5060;rport=5060;branch=z9hG4bK036380ac70257f0f5#015#012Record-Route: <sip:127.0.0.1;r2=on;lr=on;ftag=239adbead7;vsf=cBoZSlANEgEdDBcAFx8lMBIaVlgfBQANAgoaXU0MAi0xMjcuMC4wLjE6NTA4MA--;nat=yes>#015#012Record-Route: 
<sip:192.168.2.18;r2=on;lr=on;ftag=239adbead7;vsf=cBoZSlANEgEdDBcAFx8lMBIaVlgfBQANAgoaXU0MAi0xMjcuMC4wLjE6NTA4MA--;nat=yes>#015#012From: "jgutierrez" <a class="moz-txt-link-rfc2396E" href="mailto:sip:jgutierrez@pbx.villacis.com"><sip:jgutierrez@pbx.villacis.com></a>;tag=239adbead7#015#012To: "" 
<a class="moz-txt-link-rfc2396E" href="mailto:sip:102@pbx.villacis.com"><sip:102@pbx.villacis.com></a>;tag=as2e48d5d6#015#012Call-ID: 6a2222bca4cc2be8#015#012CSeq: 22329 SUBSCRIBE#015#012Server: Asterisk PBX 11.11.0#015#012Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE#015#012Supported: 
replaces, timer#015#012Expires: 3600#015#012Contact: <a class="moz-txt-link-rfc2396E" href="mailto:sip:102@127.0.0.1:5080;alias=127.0.0.1~5080~1pbx.villacis.com"><sip:102@127.0.0.1:5080;alias=127.0.0.1~5080~1pbx.villacis.com></a>;expires=3600#015#012Content-Length: 0#015#012#015#012
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [mem/shm_mem.c:111]: _shm_resize(): WARNING:vqm_resize: resize(0) called
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: tm [t_reply.c:1663]: cleanup_uac_timers(): DEBUG: cleanup_uac_timers: RETR/FR timers reset
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [usr_avp.c:644]: destroy_avp_list(): DEBUG:destroy_avp_list: destroying list (nil)
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [usr_avp.c:644]: destroy_avp_list(): DEBUG:destroy_avp_list: destroying list (nil)
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [usr_avp.c:644]: destroy_avp_list(): DEBUG:destroy_avp_list: destroying list (nil)
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [usr_avp.c:644]: destroy_avp_list(): DEBUG:destroy_avp_list: destroying list (nil)
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [usr_avp.c:644]: destroy_avp_list(): DEBUG:destroy_avp_list: destroying list (nil)
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [usr_avp.c:644]: destroy_avp_list(): DEBUG:destroy_avp_list: destroying list (nil)
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [xavp.c:448]: xavp_destroy_list(): destroying xavp list (nil)
Aug 11 12:52:53 elx3 /usr/sbin/kamailio[2971]: DEBUG: <core> [receive.c:296]: receive_msg(): receive_msg: cleaning up

Apparently the search matched, and the replace was made. However, the replacement is incorrect:

Contact: <a class="moz-txt-link-rfc2396E" href="mailto:sip:102@127.0.0.1:5080;alias=127.0.0.1~5080~1pbx.villacis.com"><sip:102@127.0.0.1:5080;alias=127.0.0.1~5080~1pbx.villacis.com></a>;expires=3600

What I going on? Is the regexp incorrect? What I expected for the Contact header is this:

Contact: <a class="moz-txt-link-rfc2396E" href="mailto:sip:102@pbx.villacis.com"><sip:102@pbx.villacis.com></a>;expires=3600
or this:
Contact: <a class="moz-txt-link-rfc2396E" href="mailto:sip:102@pbx.villacis.com;alias=127.0.0.1~5080~1"><sip:102@pbx.villacis.com;alias=127.0.0.1~5080~1></a>;expires=3600

...although I am not sure whether the latter is a valid header, but at least it would do something expected.

The documentation (<a class="moz-txt-link-freetext" href="http://www.kamailio.org/docs/modules/4.1.x/modules/textops.html#idp1655472">http://www.kamailio.org/docs/modules/4.1.x/modules/textops.html#idp1655472</a>) says the regexp is perl-style, and a sample running with perl shows the regexp to work correctly and to do what I want. I made a mistake when I mentioned that subst_hf() works correctly with the hardcoded regexp. What was really happening is that it does get accepted as a valid configuration, but displays unexpected behavior.

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