Re: [OpenSIPS-Users] Route Header removal
Mr. Burke,
Yes indeed, I looked into how I was using loose_route and that was the problem!
Thanks for the great find!
regards,
Louis Rochon
From: Users on behalf of John Burke via
Users
Sent: August 27, 2021 3:45 PM
To: users@lists.opensips.org
Subject: Re: [OpenSIPS-Users] Route Header removal
WARNING: External Email: Exercise Caution
Hey Louis,
I thought I might jump in here about your point (2). If you are referring to
preloaded Route header(s) in the initial request, then you just need to take
care when calling the loose_route [1] method. If you don't trust, or want to
disregard, any preloaded Routes then don't call loose_route and remove the
header via remove_hf to prevent downstream proxies from potentially mis-routing
the request. There are cases when you may want to allow loose routing of
preloaded sets, such as in the case of a mid-registrar with Path support [2].
[1]
https://opensips.org/html/docs/modules/devel/rr.html#func_loose_route<https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fopensips.org%2Fhtml%2Fdocs%2Fmodules%2Fdevel%2Frr.html%23func_loose_route=04%7C01%7CLouis.Rochon%40comtechtel.com%7Cfa785681107c4848338c08d969934aa7%7Ca9a26e696ae040c1bd801ca6cc677828%7C0%7C0%7C637656903637083313%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000=6VQl33o3LiPX%2Bf%2Buzk1Vh9JYTiLgnJfUHcVuUcnt1%2Bo%3D=0>
[2]
https://opensips.org/html/docs/modules/devel/path.html<https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fopensips.org%2Fhtml%2Fdocs%2Fmodules%2Fdevel%2Fpath.html=04%7C01%7CLouis.Rochon%40comtechtel.com%7Cfa785681107c4848338c08d969934aa7%7Ca9a26e696ae040c1bd801ca6cc677828%7C0%7C0%7C637656903637093269%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000=qvZvtxuyAjEYdQhdvEFLj8zReoo3wHEpnC1%2BAfi6sK4%3D=0>
Example:
route {
...
#sequential routing
...
#process preloaded routes
if (is_present_hf("Route")) {
if (...) { # honor routes
loose_route();
t_relay();
exit;
} else { # don't process and strip routes
remove_hf("Route");
}
}
...
}
Thanks,
John Burke
On 8/27/21 9:01 AM, Louis Rochon wrote:
Răzvan,
Thank you for the quick response. 2 Notes:
1. I saw another post about the visibility of header changes post manipulation.
I now understand the subtleties of that mechanism. Thanks!
2. I am trying to remove the "Route" header, and not the "Record-Route" header.
From my understanding, the Route header as the ability or override the R-URI.
OpenSIPS does exactly that (as per spec.), which is why I want to remove it.
However, even " remove_hf("Route");" OpenSIPS still attempts to route based on
the contents of the "Route" header.
Louis
-Original Message-
From: Users
<mailto:users-boun...@lists.opensips.org> On
Behalf Of Razvan Crainea
Sent: August 25, 2021 6:04 AM
To: users@lists.opensips.org<mailto:users@lists.opensips.org>
Subject: Re: [OpenSIPS-Users] Route Header removal
WARNING: External Email: Exercise Caution
Hi, Louis!
Almost all changes (perhaps the only exception is the R-URI and parts of the
Contact header) performed on the SIP message will only be visible in the
outgoing message, but *NOT* reflected in the script. This means that whatever
change you perform to the message will not be visible by the functions used -
this is the intended behavior.
If you don't want to route according the the Record-Route algorithm, you'll
have to catch the request in the local_route and force sending it to whatever
other destination you want.
Best regards,
Răzvan Crainea
OpenSIPS Core Developer
https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.opensips-solutions.com%2Fdata=04%7C01%7CLouis.Rochon%40comtechtel.com%7Cac163de2930d4203b8b508d967afbbdb%7Ca9a26e696ae040c1bd801ca6cc677828%7C0%7C0%7C637654826786421255%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000sdata=9Fz%2FcUnMykh6fP8LgaDgVSF%2FKEbdKIaXA%2FEkACXvTKQ%3Dreserved=0<https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.opensips-solutions.com%2F=04%7C01%7CLouis.Rochon%40comtechtel.com%7Cfa785681107c4848338c08d969934aa7%7Ca9a26e696ae040c1bd801ca6cc677828%7C0%7C0%7C637656903637093269%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000=%2F1leryLAZUa5VH97%2BoHFQFhYfp%2B6dsQ%2F1hxsLT8FMSU%3D=0>
On 8/24/21 10:34 PM, Louis Rochon wrote:
We are trying to remove the Route header from an incoming Invite.
Even with remove_hf, Opensips still routes towards the content of the
Route header.
Opensips.cfg:
--
route {
if ( is_method("INVITE") ) {
.
.
.
xlog
Re: [OpenSIPS-Users] Route Header removal
Hey Louis,
I thought I might jump in here about your point (2). If you are
referring to preloaded Route header(s) in the initial request, then you
just need to take care when calling the loose_route [1] method. If you
don't trust, or want to disregard, any preloaded Routes then don't call
loose_route and remove the header via remove_hf to prevent downstream
proxies from potentially mis-routing the request. There are cases when
you may want to allow loose routing of preloaded sets, such as in the
case of a mid-registrar with Path support [2].
[1] https://opensips.org/html/docs/modules/devel/rr.html#func_loose_route
[2] https://opensips.org/html/docs/modules/devel/path.html
_Example:_
route {
...
#sequential routing
...
#process preloaded routes
if (is_present_hf("Route")) {
if (...) { # honor routes
loose_route();
t_relay();
exit;
} else { # don't process and strip routes
remove_hf("Route");
}
}
...
}
Thanks,
John Burke
**
*
*
On 8/27/21 9:01 AM, Louis Rochon wrote:
Răzvan,
Thank you for the quick response. 2 Notes:
1. I saw another post about the visibility of header changes post manipulation.
I now understand the subtleties of that mechanism. Thanks!
2. I am trying to remove the "Route" header, and not the "Record-Route" header.
From my understanding, the Route header as the ability or override the R-URI. OpenSIPS does exactly
that (as per spec.), which is why I want to remove it.
However, even " remove_hf("Route");" OpenSIPS still attempts to route based on the
contents of the "Route" header.
Louis
-Original Message-
From: Users On Behalf Of Razvan Crainea
Sent: August 25, 2021 6:04 AM
To: users@lists.opensips.org
Subject: Re: [OpenSIPS-Users] Route Header removal
WARNING: External Email: Exercise Caution
Hi, Louis!
Almost all changes (perhaps the only exception is the R-URI and parts of the
Contact header) performed on the SIP message will only be visible in the
outgoing message, but *NOT* reflected in the script. This means that whatever
change you perform to the message will not be visible by the functions used -
this is the intended behavior.
If you don't want to route according the the Record-Route algorithm, you'll
have to catch the request in the local_route and force sending it to whatever
other destination you want.
Best regards,
Răzvan Crainea
OpenSIPS Core Developer
https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.opensips-solutions.com%2Fdata=04%7C01%7CLouis.Rochon%40comtechtel.com%7Cac163de2930d4203b8b508d967afbbdb%7Ca9a26e696ae040c1bd801ca6cc677828%7C0%7C0%7C637654826786421255%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000sdata=9Fz%2FcUnMykh6fP8LgaDgVSF%2FKEbdKIaXA%2FEkACXvTKQ%3Dreserved=0
On 8/24/21 10:34 PM, Louis Rochon wrote:
We are trying to remove the Route header from an incoming Invite.
Even with remove_hf, Opensips still routes towards the content of the
Route header.
Opensips.cfg:
--
route {
if ( is_method("INVITE") ) {
.
.
.
xlog("removing Route Header: $(hdr(Route)[0])\n");
remove_hf("Route");
xlog( "Route Header still present?: $(hdr(Route)[0])\n");
};
.
.
.
And then we send the call to a b2b_init_request line.
Both xlogs show the route header still there. And indeed, the opensips
attempts to route according to the contents of the route header.
Suggestions?
**
**
*Louis*
NOTICE TO RECIPIENT: This email, including attachments, may contain
information which is confidential, proprietary, attorney-client
privileged and / or controlled under U.S. export laws and regulations
and may be restricted from disclosure by applicable State and Federal
law. Nothing in this email shall create any legal binding agreement
between the parties unless expressly stated herein and provided by an
authorized representative of Comtech Telecommunications Corp. or its
subsidiaries. If you are not the intended recipient of this message,
be advised that any dissemination, distribution, or use of the
contents of this message is strictly prohibited. If you received this
message in error, please notify us immediately by return email and
permanently delete all copies of the original email and any attached
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___
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%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjo
Re: [OpenSIPS-Users] Route Header removal
Răzvan,
Thank you for the quick response. 2 Notes:
1. I saw another post about the visibility of header changes post manipulation.
I now understand the subtleties of that mechanism. Thanks!
2. I am trying to remove the "Route" header, and not the "Record-Route" header.
From my understanding, the Route header as the ability or override the R-URI.
OpenSIPS does exactly that (as per spec.), which is why I want to remove it.
However, even " remove_hf("Route");" OpenSIPS still attempts to route based on
the contents of the "Route" header.
Louis
-Original Message-
From: Users On Behalf Of Razvan Crainea
Sent: August 25, 2021 6:04 AM
To: users@lists.opensips.org
Subject: Re: [OpenSIPS-Users] Route Header removal
WARNING: External Email: Exercise Caution
Hi, Louis!
Almost all changes (perhaps the only exception is the R-URI and parts of the
Contact header) performed on the SIP message will only be visible in the
outgoing message, but *NOT* reflected in the script. This means that whatever
change you perform to the message will not be visible by the functions used -
this is the intended behavior.
If you don't want to route according the the Record-Route algorithm, you'll
have to catch the request in the local_route and force sending it to whatever
other destination you want.
Best regards,
Răzvan Crainea
OpenSIPS Core Developer
https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.opensips-solutions.com%2Fdata=04%7C01%7CLouis.Rochon%40comtechtel.com%7Cac163de2930d4203b8b508d967afbbdb%7Ca9a26e696ae040c1bd801ca6cc677828%7C0%7C0%7C637654826786421255%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000sdata=9Fz%2FcUnMykh6fP8LgaDgVSF%2FKEbdKIaXA%2FEkACXvTKQ%3Dreserved=0
On 8/24/21 10:34 PM, Louis Rochon wrote:
> We are trying to remove the Route header from an incoming Invite.
>
> Even with remove_hf, Opensips still routes towards the content of the
> Route header.
>
> Opensips.cfg:
>
> --
>
> route {
>
> if ( is_method("INVITE") ) {
>
> .
>
> .
>
> .
>
> xlog("removing Route Header: $(hdr(Route)[0])\n");
>
> remove_hf("Route");
>
> xlog( "Route Header still present?: $(hdr(Route)[0])\n");
>
> };
>
> .
>
> .
>
> .
>
> And then we send the call to a b2b_init_request line.
>
> Both xlogs show the route header still there. And indeed, the opensips
> attempts to route according to the contents of the route header.
>
> Suggestions?
>
> **
>
> **
>
> *Louis*
>
> NOTICE TO RECIPIENT: This email, including attachments, may contain
> information which is confidential, proprietary, attorney-client
> privileged and / or controlled under U.S. export laws and regulations
> and may be restricted from disclosure by applicable State and Federal
> law. Nothing in this email shall create any legal binding agreement
> between the parties unless expressly stated herein and provided by an
> authorized representative of Comtech Telecommunications Corp. or its
> subsidiaries. If you are not the intended recipient of this message,
> be advised that any dissemination, distribution, or use of the
> contents of this message is strictly prohibited. If you received this
> message in error, please notify us immediately by return email and
> permanently delete all copies of the original email and any attached
> documentation from any computer or other media.
>
> ___
> Users mailing list
> Users@lists.opensips.org
> https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists
> .opensips.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Fusersdata=04%7C01%
> 7CLouis.Rochon%40comtechtel.com%7Cac163de2930d4203b8b508d967afbbdb%7Ca
> 9a26e696ae040c1bd801ca6cc677828%7C0%7C0%7C637654826786421255%7CUnknown
> %7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJ
> XVCI6Mn0%3D%7C1000sdata=SQ6Z9NSskYelktXtqBTHCBy73ryDA0FdRdSdhmJXI
> yc%3Dreserved=0
>
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NOTICE TO RECIPIENT: This email, including attachments, may contain information
which is confidential, proprietary, attorney-client privileged and / or
controlled under U.S. export laws and regulations and may be restricted from
di
Re: [OpenSIPS-Users] Route Header removal
Hi, Louis!
Almost all changes (perhaps the only exception is the R-URI and parts of
the Contact header) performed on the SIP message will only be visible in
the outgoing message, but *NOT* reflected in the script. This means that
whatever change you perform to the message will not be visible by the
functions used - this is the intended behavior.
If you don't want to route according the the Record-Route algorithm,
you'll have to catch the request in the local_route and force sending it
to whatever other destination you want.
Best regards,
Răzvan Crainea
OpenSIPS Core Developer
http://www.opensips-solutions.com
On 8/24/21 10:34 PM, Louis Rochon wrote:
We are trying to remove the Route header from an incoming Invite.
Even with remove_hf, Opensips still routes towards the content of the
Route header.
Opensips.cfg:
--
route {
if ( is_method("INVITE") ) {
.
.
.
xlog("removing Route Header: $(hdr(Route)[0])\n");
remove_hf("Route");
xlog( "Route Header still present?: $(hdr(Route)[0])\n");
};
.
.
.
And then we send the call to a b2b_init_request line.
Both xlogs show the route header still there. And indeed, the opensips
attempts to route according to the contents of the route header.
Suggestions?
**
**
*Louis*
NOTICE TO RECIPIENT: This email, including attachments, may contain
information which is confidential, proprietary, attorney-client
privileged and / or controlled under U.S. export laws and regulations
and may be restricted from disclosure by applicable State and Federal
law. Nothing in this email shall create any legal binding agreement
between the parties unless expressly stated herein and provided by an
authorized representative of Comtech Telecommunications Corp. or its
subsidiaries. If you are not the intended recipient of this message, be
advised that any dissemination, distribution, or use of the contents of
this message is strictly prohibited. If you received this message in
error, please notify us immediately by return email and permanently
delete all copies of the original email and any attached documentation
from any computer or other media.
___
Users mailing list
Users@lists.opensips.org
http://lists.opensips.org/cgi-bin/mailman/listinfo/users
___
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