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From: Alexander Mihalicyn <alexander@mihalicyn.com>
To: noloader@gmail.com
Cc: kernelnewbies <kernelnewbies@kernelnewbies.org>
Subject: Re: Kernel TLS
Date: Fri, 29 Nov 2019 11:46:12 -0800
Message-ID: <CAJqdLrpcQE_g2ZtyUDXVC-cAphk9KBxVQ-zPv0gVFpsc5au09Q@mail.gmail.com> (raw)
In-Reply-To: <CAH8yC8nZ=Ka5SLKnMWr7ukC4zFA8_Zi226UoKHUA4jZMY0LoNQ@mail.gmail.com>

Hello,

I think you need to load "tls" kernel module first.

Regards, Alex

On Fri, Nov 29, 2019 at 11:37 AM Jeffrey Walton <noloader@gmail.com> wrote:
>
> Hi Everyone,
>
> I'm trying to run through the example at
> https://www.kernel.org/doc/html/latest/networking/tls.html#kernel-tls
> .
>
> I'm working on Fedora 31 x86_64 (fully patched). Running my program results in:
>
>     $ ./ktls
>     setsockopt failed, 2, No such file or directory
>
> I observed:
>
>     $ cat /proc/sys/net/ipv4/tcp_available_ulp
>     $
>
> Is there a way to enable ULP at boot? Or is this a kernel config
> option? Or maybe I am doing something else wrong?
>
> Below is the sample code.
>
> Jeff
>
> ==============================
>
> #include <stdio.h>
> #include <unistd.h>
> #include <errno.h>
> #include <string.h>
>
> #include <sys/socket.h>
> #include <sys/types.h>
>
> #include <linux/tls.h>
> #include <netinet/ip.h>
> #include <netinet/tcp.h>
>
> int main()
> {
>     int sock = socket(AF_INET, SOCK_STREAM, 0);
>     if (sock == -1)
>     {
>         printf("socket failed, %d, %s\n", errno, strerror(errno));
>         return 1;
>     }
>
>     if (setsockopt(sock, SOL_TCP, TCP_ULP, "tls", sizeof("tls")) == -1 )
>     {
>         printf("setsockopt failed, %d, %s\n", errno, strerror(errno));
>         return 1;
>     }
>
>     close (sock);
>     return 0;
> }
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies@kernelnewbies.org
> https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies

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Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-29 19:36 Jeffrey Walton
2019-11-29 19:46 ` Alexander Mihalicyn [this message]
2019-11-29 19:48 ` Valentin Vidić
2019-11-29 19:57   ` Jeffrey Walton
2019-11-29 20:04     ` Jeffrey Walton
2019-11-30  4:37       ` Jeffrey Walton
2019-11-30  6:16         ` Alexander Mihalicyn
2019-11-30  6:40         ` Valdis Klētnieks
2019-11-30  8:13           ` Bjørn Mork
2019-11-30  9:11             ` Valdis Klētnieks
2019-11-30 10:10               ` Bjørn Mork
2019-11-30 10:34                 ` Valdis Klētnieks
2019-11-30 12:54                   ` [PATCH] net/tls: Fix return values for setsockopt Valentin Vidic
2019-11-30 13:15                     ` Jeffrey Walton
2019-11-30 13:31                       ` Valentin Vidić

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