TLS version selection for http client

[naveed5]

Hi, looking for a way to select tls version on run time, currently two options are available while creating httpclient.

i- bool useOldTLS = false -> tls 1.3
ii- bool useOldTLS = true -> tls 1.2 and tls1.1

is there anyway to check which tls version is supported by server, for example if I create httpclient with "useOldTLS = false", and server doesn't support tls1.3 , request is going to fail.

curl detects the tls version on server automatically when request is made. looking for something similar with drogon client.
code snippet from drogon client for reference

static HttpClientPtr newHttpClient(const std::string &hostString,
                                   trantor::EventLoop *loop = nullptr,
                                   bool useOldTLS = false,
                                   bool validateCert = true);