ooni-probe-cli/internal/engine/netx/dialer/logging.go

package dialer

import (
	"context"
	"crypto/tls"
	"net"
	"time"

	"github.com/ooni/probe-cli/v3/internal/engine/internal/tlsx"
)

// Logger is the logger assumed by this package
type Logger interface {
	Debugf(format string, v ...interface{})
	Debug(message string)
}

// LoggingDialer is a Dialer with logging
type LoggingDialer struct {
	Dialer
	Logger Logger
}

// DialContext implements Dialer.DialContext
func (d LoggingDialer) DialContext(ctx context.Context, network, address string) (net.Conn, error) {
	d.Logger.Debugf("dial %s/%s...", address, network)
	start := time.Now()
	conn, err := d.Dialer.DialContext(ctx, network, address)
	stop := time.Now()
	d.Logger.Debugf("dial %s/%s... %+v in %s", address, network, err, stop.Sub(start))
	return conn, err
}

// LoggingTLSHandshaker is a TLSHandshaker with logging
type LoggingTLSHandshaker struct {
	TLSHandshaker
	Logger Logger
}

// Handshake implements Handshaker.Handshake
func (h LoggingTLSHandshaker) Handshake(
	ctx context.Context, conn net.Conn, config *tls.Config,
) (net.Conn, tls.ConnectionState, error) {
	h.Logger.Debugf("tls {sni=%s next=%+v}...", config.ServerName, config.NextProtos)
	start := time.Now()
	tlsconn, state, err := h.TLSHandshaker.Handshake(ctx, conn, config)
	stop := time.Now()
	h.Logger.Debugf(
		"tls {sni=%s next=%+v}... %+v in %s {next=%s cipher=%s v=%s}", config.ServerName,
		config.NextProtos, err, stop.Sub(start), state.NegotiatedProtocol,
		tlsx.CipherSuiteString(state.CipherSuite), tlsx.VersionString(state.Version))
	return tlsconn, state, err
}

var _ Dialer = LoggingDialer{}
var _ TLSHandshaker = LoggingTLSHandshaker{}