KTLS with openssl 3.0 fail with error ENOTCONN(Transport endpoint is not connected)

[Gaurav Jain]

Hi

Kernel Support for KTLS:
kernel version is 5.15
CONFIG_TLS=y
CONFIG_TLS_DEVICE=y
CONFIG_CRYPTO_TLS=y

Openssl:
$ ./ Configure enable-ktls linux-aarch64
$ make

Server
$ ./openssl version
OpenSSL 3.0.2-dev 14 Dec 2021 (Library: OpenSSL 3.0.0 7 sep 2021)
$ ./openssl s_server -key rsa.key -cert server.pem -accept 443

error
file: crypto/bio/bio_sock2.c
function: BIO_socket()
ktls_enable(sock); failed with ENOTCONN error
setsockopt failed, 107, Transport endpoint is not connected

server logs( added some debug logs)

root at imx8mmevk:~# ./openssl s_server -key rsa.key -cert server.pem -accept 443
sk->sk_state != TCP_ESTABLISHED (log added in kernel net/tls/tls_main.c)
sk->sk_state != TCP_ESTABLISHED

BIO_socket sock_family = 10, sock_type = 1, sock_protocol = 6, return = 3
setsockopt failed, 107, Transport endpoint is not connected
BIO_socket, ktls_enable(asock) = 0
ACCEPT
setsockopt failed, 17, File exists
BIO_new_socket, ktls_enable(s) = 0
-----BEGIN SSL SESSION PARAMETERS-----
MF8CAQECAgMDBALAMAQABDAC9MHCSSlLXrS0D8tq2hCZtW0vmB1EC6HQerBThuev
PdX7VOUnD1a2bybdw1LfEiqhBgIEYcLciaIEAgIcIKQGBAQBAAAArQMCAQGzAwIB
HQ==
-----END SSL SESSION PARAMETERS-----
Shared ciphers:ECDHE-RSA-AES256-GCM-SHA384
Signature Algorithms: ECDSA+SHA256:ECDSA+SHA384:ECDSA+SHA512:Ed25519:Ed448:RSA-PSS+SHA256:RSA-PSS+SHA384:RSA-PSS+SHA512:RSA-PSS+SHA256:RSA-PSS+SHA384:RSA-PSS+SHA512:RSA+SHA256:RSA+SHA384:RSA+SHA512:ECDSA+SHA224:RSA+SHA224:DSA+SHA224:DSA+SHA256:DSA+SHA384:DSA+SHA512
Shared Signature Algorithms: ECDSA+SHA256:ECDSA+SHA384:ECDSA+SHA512:Ed25519:Ed448:RSA-PSS+SHA256:RSA-PSS+SHA384:RSA-PSS+SHA512:RSA-PSS+SHA256:RSA-PSS+SHA384:RSA-PSS+SHA512:RSA+SHA256:RSA+SHA384:RSA+SHA512:ECDSA+SHA224:RSA+SHA224:DSA+SHA224:DSA+SHA256:DSA+SHA384:DSA+SHA512
Supported Elliptic Curve Point Formats: uncompressed:ansiX962_compressed_prime:ansiX962_compressed_char2
Supported groups: x25519:secp256r1:x448:secp521r1:secp384r1
Shared groups: x25519:secp256r1:x448:secp521r1:secp384r1
CIPHER is ECDHE-RSA-AES256-GCM-SHA384
Secure Renegotiation IS supported
Using Kernel TLS for sending fail
Using Kernel TLS for receiving fail

Regards

Gaurav Jain

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