TCP_ULP option is not working for tls

TCP_ULP option is not working for tls

[Kernel.org Bugbot]

sumit.200744 writes via Kernel.org Bugzilla:

TCP socket was created as below
int sfd = socket(AF_INET,SOCK_STREAM,0).

socket connection was established between server and client using accept and connect calls.

To enable TCP_ULP, setsockopt was used as below
Client:
setsockopt(sfd, IPPROTO_TCP, TCP_ULP, "tls", sizeof("tls"));
Server:
setsockopt(nsfd, IPPROTO_TCP, TCP_ULP, "tls", sizeof("tls"));

but setsockopt is returning -1 with error ENOENT - "No such file or directory". Is anything missing for above usage ?

Which kernel version has TLS option enabled which is mentioned in https://www.kernel.org/doc/html/latest/networking/tls.html#kernel-tls ?

View: https://bugzilla.kernel.org/show_bug.cgi?id=217401#c0
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Kernel.org Bugzilla (peebz 0.1)

Re: TCP_ULP option is not working for tls

[Kernel.org Bugbot]

sumit.200744 writes via Kernel.org Bugzilla:

I tried it on 5.15.78 where I'm getting the above failure -  "No such file or directory for setsockopt.
Not sure on which linux kernel this TLS option is introduced.

View: https://bugzilla.kernel.org/show_bug.cgi?id=217401#c2
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Kernel.org Bugzilla (peebz 0.1)

Re: TCP_ULP option is not working for tls

[Jakub Kicinski]

On Thu,  4 May 2023 16:19:29 +0000 (UTC) Kernel.org Bugbot wrote:
> I tried it on 5.15.78 where I'm getting the above failure -  "No such
> file or directory for setsockopt. Not sure on which linux kernel this
> TLS option is introduced.

Can you show the output of:

  modprobe tls
  cat /proc/sys/net/ipv4/tcp_available_ulp
  grep CONFIG_TLS /boot/config-*

?

Re: TCP_ULP option is not working for tls

[Kernel.org Bugbot]

mricon writes via Kernel.org Bugzilla:

What kernel version is this?

View: https://bugzilla.kernel.org/show_bug.cgi?id=217401#c1
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Kernel.org Bugzilla (peebz 0.1)

Re: TCP_ULP option is not working for tls

[Kernel.org Bugbot]

sumit.200744 writes via Kernel.org Bugzilla:

Trying it on android platform. Seems TLS is not enabled in kernel

# modprobe tls
modprobe: No module configuration directories given.

# insmod tls
insmod: tls: No such file or directory

# cat /proc/sys/net/ipv4/tcp_available_ulp

# grep CONFIG_TLS /boot/config-*
grep: /boot/config-*: No such file or directory

View: https://bugzilla.kernel.org/show_bug.cgi?id=217401#c4
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Kernel.org Bugzilla (peebz 0.1)

Re: TCP_ULP option is not working for tls

[Kernel.org Bugbot]

kubakici writes via Kernel.org Bugzilla:

Sounds like it. I'm not familiar with the Android kernel but the tls code either needs to be loaded as a module or compiled in, and since /proc/sys/net/ipv4/tcp_available_ulp is empty - neither seems to be the case on your system.

View: https://bugzilla.kernel.org/show_bug.cgi?id=217401#c5
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