Imports github.com/pkg/errors github.com/urfave/cli github.com/xtaci/kcp-go/v5 github.com/xtaci/kcptun/generic github.com/xtaci/smux github.com/xtaci/tcpraw golang.org/x/crypto/pbkdf2 Standard library imports crypto/sha1 encoding/json fmt io log math/rand net os os/signal syscall time