diff options
Diffstat (limited to 'netlib')
| -rw-r--r-- | netlib/tcp.py | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/netlib/tcp.py b/netlib/tcp.py index f6179faa..fc2ce115 100644 --- a/netlib/tcp.py +++ b/netlib/tcp.py @@ -6,6 +6,8 @@ import sys import threading import time import traceback + +import OpenSSL from OpenSSL import SSL from . import certutils @@ -401,16 +403,17 @@ class _Connection(object): if log_ssl_key: context.set_info_callback(log_ssl_key) - # advertise application layer protocols - if alpn_protos is not None: - context.set_alpn_protos(alpn_protos) + if OpenSSL._util.lib.Cryptography_HAS_ALPN: + # advertise application layer protocols + if alpn_protos is not None: + context.set_alpn_protos(alpn_protos) - # select application layer protocol - if alpn_select is not None: - def alpn_select_f(conn, options): - return bytes(alpn_select) + # select application layer protocol + if alpn_select is not None: + def alpn_select_f(conn, options): + return bytes(alpn_select) - context.set_alpn_select_callback(alpn_select_f) + context.set_alpn_select_callback(alpn_select_f) return context |