Upgrading a Connection to TLS in Go
This discussion explores the issue of upgrading an open TCP connection to TLS when an error occurs during the TLS handshake.
Initial Issue Description
The original issue is described as encountering a segmentation fault when attempting to upgrade a TCP connection to TLS. The affected code involves using a textproto.Conn to read from the connection, which is then upgraded to TLS using tx.Conn = tls.Server(tx.Conn, tx.Server.Conf.TlsConf) and tx.Text = textproto.NewConn(tx.Conn).
Solution
The provided solution addresses the error by suggesting a different approach for upgrading the connection.
Steps for Upgrading Connection
Explanations
Additional Information
Tips for Testing
To test the upgraded TLS connection, the following command can be used:
openssl s_client -starttls smtp -crlf -connect example.com:25
This enables interaction with the TLS-protected server and allows commands to be issued.
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