Configurable minimum supported TLS protocol version

`-o ssl_min_version` can be used to configure the server to only accept
handshakes from clients with a minimum TLS protocol version. Currently
supported options are TLS v1.0, TLS v1.1, TLS v1.2, and TLS v1.3
(OpenSSL 1.1.1+ only).

1 files changed, 1 insertions, 0 deletions

diff --git a/tls.h b/tls.h
index 3ec2e29..18e7e0d 100644
--- a/tls.h
+++ b/tls.h
@@ -15,5 +15,6 @@ int ssl_init(void);
 bool refresh_certs(char **errmsg);
 void ssl_callback(const SSL *s, int where, int ret);
 int ssl_new_session_callback(SSL *s, SSL_SESSION *sess);
+const char *ssl_proto_text(int version);
 
 #endif