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append_hf not working

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Calvin E.

9 Mar 2024 9 Mar '24

3:15 a.m.

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?

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Benoit Panizzon

11 Mar 11 Mar

8:40 a.m.

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 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web http://www.imp.ch ______________________________________________________

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Unai Rodriguez

9:33 a.m.

Using https://kamailio.org/docs/modules/stable/modules/textopsx.html#textopsx.f.m… 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(a)lists.kamailio.org>rg>, 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 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web http://www.imp.ch ______________________________________________________ __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

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Henning Westerholt

11:45 a.m.

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://skalatan.de/blog/ Kamailio services – https://gilawa.com<https://gilawa.com/> From: Unai Rodriguez via sr-users <sr-users(a)lists.kamailio.org> Sent: Montag, 11. März 2024 09:33 To: Calvin E. via sr-users <sr-users(a)lists.kamailio.org>rg>; Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org> Cc: Unai Rodriguez <unai(a)rodr.org> Subject: [SR-Users] Re: append_hf not working Using https://kamailio.org/docs/modules/stable/modules/textopsx.html#textopsx.f.m… 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<mailto: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 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web http://www.imp.ch ______________________________________________________ __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave@lists.kamailio.org<mailto:sr-users-leave@lists.kamailio.org> Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

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Alex Balashov

12:13 p.m.

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(a)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://skalatan.de/blog/ Kamailio services – https://gilawa.com From: Unai Rodriguez via sr-users <sr-users(a)lists.kamailio.org> Sent: Montag, 11. März 2024 09:33 To: Calvin E. via sr-users <sr-users(a)lists.kamailio.org>rg>; Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org> Cc: Unai Rodriguez <unai(a)rodr.org> Subject: [SR-Users] Re: append_hf not working Using https://kamailio.org/docs/modules/stable/modules/textopsx.html#textopsx.f.m… 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(a)lists.kamailio.org>rg>, 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 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web http://www.imp.ch ______________________________________________________ __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

-- Alex Balashov Principal Consultant Evariste Systems LLC Web: https://evaristesys.com Tel: +1-706-510-6800

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James Browne

1:02 p.m.

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(a)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(a)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://skalatan.de/blog/ Kamailio services – https://gilawa.com From: Unai Rodriguez via sr-users <sr-users(a)lists.kamailio.org> Sent: Montag, 11. März 2024 09:33 To: Calvin E. via sr-users <sr-users(a)lists.kamailio.org>rg>; Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org> Cc: Unai Rodriguez <unai(a)rodr.org> Subject: [SR-Users] Re: append_hf not working Using https://kamailio.org/docs/modules/stable/modules/textopsx.html#textopsx.f.m… 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(a)lists.kamailio.org>rg>, 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 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web http://www.imp.ch ______________________________________________________ __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

-- Alex Balashov Principal Consultant Evariste Systems LLC Web: https://evaristesys.com Tel: +1-706-510-6800 __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

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Ben Kaufman

2:47 p.m.

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(a)lists.kamailio.org> Sent: Monday, March 11, 2024 7:03 AM To: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org> Cc: James Browne <james(a)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(a)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(a)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(a)lists.kamailio.org> Sent: Montag, 11. März 2024 09:33 To: Calvin E. via sr-users <sr-users(a)lists.kamailio.org>rg>; Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org> Cc: Unai Rodriguez <unai(a)rodr.org> Subject: [SR-Users] Re: append_hf not working Using https://kamailio.org/docs/modules/stable/modules/textopsx.html#textopsx.f.m… 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(a)lists.kamailio.org>rg>, 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 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web 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-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

-- 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 unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

__________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

Reply

Calvin E.

4:55 p.m.

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(a)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(a)lists.kamailio.org> Sent: Monday, March 11, 2024 7:03 AM To: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org> Cc: James Browne <james(a)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(a)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(a)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(a)lists.kamailio.org> Sent: Montag, 11. März 2024 09:33 To: Calvin E. via sr-users <sr-users(a)lists.kamailio.org>rg>; Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org> Cc: Unai Rodriguez <unai(a)rodr.org> Subject: [SR-Users] Re: append_hf not working Using https://kamailio.org/docs/modules/stable/modules/textopsx.html#textopsx.f.m… 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(a)lists.kamailio.org>rg>, 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 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web 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-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

-- 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 unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

__________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

Reply

Calvin E.

13 Mar 13 Mar

5:16 p.m.

According to a packet capture, changing append_hf() to append_to_reply() affected a 302 message that Kamailio is forwarding to sending to itself, but the subsequent INVITE did not keep the header. What am I missing? On Mon, Mar 11, 2024 at 7:28 AM Ben Kaufman via sr-users <sr-users(a)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(a)lists.kamailio.org> Sent: Monday, March 11, 2024 7:03 AM To: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org> Cc: James Browne <james(a)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(a)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(a)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(a)lists.kamailio.org> Sent: Montag, 11. März 2024 09:33 To: Calvin E. via sr-users <sr-users(a)lists.kamailio.org>rg>; Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org> Cc: Unai Rodriguez <unai(a)rodr.org> Subject: [SR-Users] Re: append_hf not working Using https://kamailio.org/docs/modules/stable/modules/textopsx.html#textopsx.f.m… 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(a)lists.kamailio.org>rg>, 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 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web 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-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

-- 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 unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

__________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

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Daniel-Constantin Mierla

5:44 p.m.

Hello, append_to_reply() adds the header to the replies generated by Kamailio. A request that is generated by UA after a 3xx does not have to preserve any header received in 3xx, it is a completely new request, the previous one failed. If you handle the 3xx in Kamailio, you can get the headers of the reply in failure route via T_rpl(...) and add them to the request. Cheers, Daniel On 13.03.24 17:16, Calvin E. via sr-users wrote:

According to a packet capture, changing append_hf() to append_to_reply() affected a 302 message that Kamailio is forwarding to sending to itself, but the subsequent INVITE did not keep the header. What am I missing? On Mon, Mar 11, 2024 at 7:28 AM Ben Kaufman via sr-users <sr-users(a)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(a)lists.kamailio.org> Sent: Monday, March 11, 2024 7:03 AM To: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org> Cc: James Browne <james(a)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(a)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(a)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(a)lists.kamailio.org> Sent: Montag, 11. März 2024 09:33 To: Calvin E. via sr-users <sr-users(a)lists.kamailio.org>rg>; Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org> Cc: Unai Rodriguez <unai(a)rodr.org> Subject: [SR-Users] Re: append_hf not working Using https://kamailio.org/docs/modules/stable/modules/textopsx.html#textopsx.f.m… 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(a)lists.kamailio.org>rg>, 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 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web 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-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

-- 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 unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

__________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

__________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

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Alex Balashov
Ben Kaufman
Benoit Panizzon
Calvin E.
Daniel-Constantin Mierla
Henning Westerholt
James Browne
Unai Rodriguez