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