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Would be nicer not to forward all headers inline, that results in a
message easy to read (especially on mobile devices) and therefore
faster to answer.<br>
<br>
You use subst over contact and set contact allias, which both append
values there, deleting same old content. Note that any change to sip
message is not applied immediately, but kept as a diff operation.
You need to use msg_apply_changes() after each change that you need
to be visible immediately -- read the readme of textopsx for proper
usage of this function.<br>
<br>
Cheers,<br>
Daniel<br>
<br>
<div class="moz-cite-prefix">On 12/08/14 17:22, Alex Villacís Lasso
wrote:<br>
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<td>Alex Villacís Lasso <a moz-do-not-send="true"
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<td>Re: [SR-Users] How do I make subst_hf() use variables
in search (not replacement)?</td>
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<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 moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:sr-users@lists.sip-router.org">sr-users@lists.sip-router.org</a>
>> <a moz-do-not-send="true" 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 moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:sip:102@127.0.0.1:5080"><sip:102@127.0.0.1:5080></a> => [<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:sip:102@127.0.0.1:5080;alias=127.0.0.1%7E5080%7E1">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 moz-do-not-send="true" 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: <a class="moz-txt-link-rfc2396E" href="sip:127.0.0.1;r2=on;lr=on;ftag=239adbead7;vsf=cBoZSlANEgEdDBcAFx8lMBIaVlgfBQANAgoaXU0MAi0xMjcuMC4wLjE6NTA4MA--;nat=yes"><sip:127.0.0.1;r2=on;lr=on;ftag=239adbead7;vsf=cBoZSlANEgEdDBcAFx8lMBIaVlgfBQANAgoaXU0MAi0xMjcuMC4wLjE6NTA4MA--;nat=yes></a>#015#012Record-Route:
<a class="moz-txt-link-rfc2396E" href="sip:192.168.2.18;r2=on;lr=on;ftag=239adbead7;vsf=cBoZSlANEgEdDBcAFx8lMBIaVlgfBQANAgoaXU0MAi0xMjcuMC4wLjE6NTA4MA--;nat=yes"><sip:192.168.2.18;r2=on;lr=on;ftag=239adbead7;vsf=cBoZSlANEgEdDBcAFx8lMBIaVlgfBQANAgoaXU0MAi0xMjcuMC4wLjE6NTA4MA--;nat=yes></a>#015#012From: "jgutierrez" <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:sip:jgutierrez@pbx.villacis.com"><sip:jgutierrez@pbx.villacis.com></a>;tag=239adbead7#015#012To: ""
<a moz-do-not-send="true" 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 moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:sip:102@127.0.0.1:5080;alias=127.0.0.1%7E5080%7E1pbx.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 moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:sip:102@127.0.0.1:5080;alias=127.0.0.1%7E5080%7E1pbx.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 moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:sip:102@pbx.villacis.com"><sip:102@pbx.villacis.com></a>;expires=3600
or this:
Contact: <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:sip:102@pbx.villacis.com;alias=127.0.0.1%7E5080%7E1"><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 moz-do-not-send="true" 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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SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:sr-users@lists.sip-router.org">sr-users@lists.sip-router.org</a>
<a moz-do-not-send="true" 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>
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<pre wrap="">_______________________________________________
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>
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<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla
<a class="moz-txt-link-freetext" href="http://twitter.com/#!/miconda">http://twitter.com/#!/miconda</a> - <a class="moz-txt-link-freetext" href="http://www.linkedin.com/in/miconda">http://www.linkedin.com/in/miconda</a>
Next Kamailio Advanced Trainings 2014 - <a class="moz-txt-link-freetext" href="http://www.asipto.com">http://www.asipto.com</a>
Sep 22-25, Berlin, Germany ::: Oct 15-17, San Francisco, USA</pre>
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