[Bug 2092149] [NEW] rtpengine-kernel-dkms FTBS in Noble with linux-6.11-hwe kernel

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[ Impact ]

rtpengine-kernel-dkms does not compile from source in Noble with kernel
6.11:

/var/lib/dkms/rtpengine/11.5.1.18/build/xt_RTPENGINE.c: In function ‘send_proxy_packet4’:
/var/lib/dkms/rtpengine/11.5.1.18/build/xt_RTPENGINE.c:4020:14: error: too few arguments to function ‘ip_route_output’
 4020 |         rt = ip_route_output(net, dst->u.ipv4, src->u.ipv4, tos, 0);
      |              ^~~~~~~~~~~~~~~
In file included from ./include/net/ip.h:30,
                 from ./include/net/ip6_checksum.h:27,
                 from /var/lib/dkms/rtpengine/11.5.1.18/build/xt_RTPENGINE.c:5:
./include/net/route.h:157:30: note: declared here
  157 | static inline struct rtable *ip_route_output(struct net *net, __be32 daddr,
      |                              ^~~~~~~~~~~~~~~

[ Test case ]

Install the latest linux-6.11 kernel on Noble:

$ sudo add-apt-repository ppa:canonical-kernel-team/ppa
$ sudo apt update
$ sudo apt install linux-image-6.11.0-12-generic \
                   linux-modules-6.11.0-12-generic \
                   linux-modules-extra-6.11.0-12-generic \
                   linux-headers-6.11.0-12-generic

Install rtpengine-kernel-dkms:

$ sudo apt install rtpengine-kernel-dkms

Load the module:

$ sudo modprobe xt_RTPENGINE

The same procedure should be repeated on linux-6.8 to test for possible
regressions.

[ Fix ]

Patch the code to properly support the new linux 6.11 ABI.

[ Regression potential ]

A regression is unlikely due to the very limited scope of the patch

** Affects: rtpengine (Ubuntu)
     Importance: Undecided
     Assignee: Massimiliano Pellizzer (mpellizzer)
         Status: In Progress

** Affects: rtpengine (Ubuntu Noble)
     Importance: Undecided
     Assignee: Massimiliano Pellizzer (mpellizzer)
         Status: In Progress


** Tags: patch
-- 
rtpengine-kernel-dkms FTBS in Noble with linux-6.11-hwe kernel
https://bugs.launchpad.net/bugs/2092149
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