Thank you everyone for the feedback. I realized my initial post was
bereft of details. I'm not at liberty to share the entire script, but
I will try to distill it. The original INVITE is sent to our internal
STI-VS which returns a 302. Kamilio handles that locally and then
sends the INVITE back to itself for further processing. I'm not sure
what context that put me in with regards to
request/reply/failure/branch.
Here are some of the pieces:
failure_route[RTF_DISPATCH] {
...
# handle internal redirects ourselves instead of passing back to client
if (t_check_status("3[0-9][0-9]")) {
get_redirects("1:1");
xlog("L_INFO", "| | |(RESP) ($ci) redirect
branches: $bR \n");
# see if the first redirect branch is local
if (is_ip_rfc1918($(br{uri.domain}))) {
xlog("L_INFO", "| | |(RESP) ($ci) Handling
internal redirect to $br \n");
t_on_failure("RTF_DISPATCH");
route(RELAY);
exit;
}
}
...
route[RELAY] {
if (!has_totag()) {
dlg_manage();
}
# enable additional event routes for forwarded requests
# - serial forking, RTP relaying handling, a.s.o.
if (is_method("INVITE|NOTIFY|REFER|BYE|PRACK")) {
if (is_method("BYE")) {
route(TUI_CALL_REDUNDANCY_CLEAR);
}
t_on_branch("MANAGE_BRANCH");
t_on_reply("MANAGE_REPLY");
}
if (is_method("ACK")) {
xlog("L_INFO", "$var(logPrefixIn2) Forwarding ACK\n");
# forward the ACK statelessly
route(NATMANAGE);
forward();
} else {
if (!t_relay()) {
xlog("L_ERROR", "$var(logPrefixCall) Failed to relay request\n");
sl_reply_error();
} else if (is_method("NOTIFY")) {
xlog("L_INFO", "$var(logPrefixIn2) Relaying notify request
with SipFrag($rb)\n");
} else {
xlog("L_INFO", "$var(logPrefixIn2) Relaying request\n");
}
}
exit;
}
On Mon, Mar 11, 2024 at 7:28 AM Ben Kaufman via sr-users
<sr-users@lists.kamailio.org> wrote:
>
> There's also the question of when the header was appended as well, right?
> Calling append_hf() after creating a transaction will only apply that header
> to the current branch, not to subsequent branches.
>
>
> -----Original Message-----
> From: James Browne via sr-users <sr-users@lists.kamailio.org>
> Sent: Monday, March 11, 2024 7:03 AM
> To: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org>
> Cc: James Browne <ja...@frideo.com>
> Subject: [SR-Users] Re: append_hf not working
>
> CAUTION: This email originated from outside the organization. Do not click
> links or open attachments unless you recognize the sender and know the
> content is safe.
>
>
> One pitfall would be to think that this function would add this header field
> to any reply that kamailio would send. This append_hf() function should add a
> header field to a SIP request that it *relays*, but would not add it to a
> response that kamailio *generates* (for that, you would use the
> append_to_reply() function).
>
> James
>
> On Mon, 11 Mar 2024 at 11:26, Alex Balashov via sr-users
> <sr-users@lists.kamailio.org> wrote:
> >
> > Indeed, it has become a bit of a cliché that msg_apply_changes() should be
> > called after append_hf(), uac_replace_from(), etc.
> >
> > This should be dispelled. In the vast majority of use-cases, it is not only
> > unnecessary, but highly undesirable.
> >
> > -- Alex
> >
> > > On 11 Mar 2024, at 06:45, Henning Westerholt via sr-users
> > > <sr-users@lists.kamailio.org> wrote:
> > >
> > > Hello,
> > > the usage of msg_apply_changes is not necessary (not even recommended)
> > > for append_hf (and other functions) to work. The OP was talking about a
> > > packet capture, so I assume that he got the capture after the proxy send
> > > out the message.
> > > Cheers,
> > > Henning
> > > -- Henning Westerholt -
> > > https://sk/
> > > alatan.de%2Fblog%2F&data=05%7C02%7Cbkaufman%40bcmone.com%7Cb9eabef23
> > > 1974f061db008dc41c47c6b%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7
> > > C638457559371077852%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQ
> > > IjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=IUKBac
> > > HQspO1gtJ5B3ZULUOt6oAJKaTMBWM6R%2FDiq1Y%3D&reserved=0
> > > Kamailio services - https://gilawa.com/
> > > From: Unai Rodriguez via sr-users <sr-users@lists.kamailio.org>
> > > Sent: Montag, 11. März 2024 09:33
> > > To: Calvin E. via sr-users <sr-users@lists.kamailio.org>; Kamailio
> > > (SER) - Users Mailing List <sr-users@lists.kamailio.org>
> > > Cc: Unai Rodriguez <u...@rodr.org>
> > > Subject: [SR-Users] Re: append_hf not working Using
> > > https://kamailio.org/docs/modules/stable/modules/textopsx.html#textopsx.f.msg_apply_changes
> > > might be relevant in your case...
> > > With best wishes, Unai Rodriguez
> > > On 11 Mar 2024 at 09:22 +0100, Benoit Panizzon via sr-users
> > > <sr-users@lists.kamailio.org>, wrote:
> > >
> > > Hi Calvin
> > >
> > >
> > > I'm trying to add something simple like the following:
> > >
> > > append_hf("X-testheader: True\r\n", "From");
> > >
> > > However, I don't see my X-testheader in a packet capture. Are there
> > > any common pitfalls that would prevent append_hf from working as
> > > expected?
> > >
> > > Weird, I use this a lot and it always works. But I never attempted
> > > to specify the header after which it should be appended. Does it
> > > work if you don't specifiy "From"?
> > >
> > > Mit freundlichen Grüssen
> > >
> > > -Benoît Panizzon-
> > > --
> > > I m p r o W a r e A G - Leiter Commerce Kunden
> > > ______________________________________________________
> > >
> > > Zurlindenstrasse 29 Tel +41 61 826 93 00
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> > > http://www/
> > > .imp.ch%2F&data=05%7C02%7Cbkaufman%40bcmone.com%7Cb9eabef231974f061d
> > > b008dc41c47c6b%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C63845755
> > > 9371097127%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luM
> > > zIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=fOFt%2BsXu%2FDg
> > > 3EeKqhoRlybWURiVXfz%2B0Di8aSYFWxvQ%3D&reserved=0
> > > ______________________________________________________
> > > __________________________________________________________
> > > Kamailio - Users Mailing List - Non Commercial Discussions To
> > > unsubscribe send an email to sr-users-le...@lists.kamailio.org
> > > Important: keep the mailing list in the recipients, do not reply only to
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> > > Edit mailing list options or unsubscribe:
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> >
> > --
> > Alex Balashov
> > Principal Consultant
> > Evariste Systems LLC
> > Web:
> > https://evar/
> > istesys.com%2F&data=05%7C02%7Cbkaufman%40bcmone.com%7Cb9eabef231974f06
> > 1db008dc41c47c6b%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C63845755
> > 9371101627%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzI
> > iLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=YfdvEmQ5OWU4MOZ6dcj
> > rEP657%2FZ5A0ZA4lDz%2FeWSU2Q%3D&reserved=0
> > Tel: +1-706-510-6800
> >
> > __________________________________________________________
> > Kamailio - Users Mailing List - Non Commercial Discussions To
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