ooni-probe-cli/internal/engine/experiment/websteps/tcp.go

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package websteps
import (
"context"
"net"
"github.com/ooni/probe-cli/v3/internal/netxlite"
)
type TCPConfig struct {
Dialer netxlite.Dialer
Endpoint string
Resolver netxlite.Resolver
}
// TCPDo performs the TCP check.
func TCPDo(ctx context.Context, config TCPConfig) (net.Conn, error) {
if config.Dialer != nil {
return config.Dialer.DialContext(ctx, "tcp", config.Endpoint)
}
resolver := config.Resolver
if resolver == nil {
resolver = &netxlite.ResolverSystem{}
}
dialer := NewDialerResolver(resolver)
return dialer.DialContext(ctx, "tcp", config.Endpoint)
}