transport_constraints.h

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#ifndef ROUTING_TRANSPORT_CONSTRAINTS_INCLUDED
#define ROUTING_TRANSPORT_CONSTRAINTS_INCLUDED
 
#include <string>
 
class TransportConstraints {
 public:
  enum class Constraint {
    kPlaintext,      // no encryption
    kSecure,         // used initially for kPreferred,
                     // to pick either TCP+Encrypted or Unix+Plaintext.
    kEncrypted,      // force encryption
    kHasClientCert,  // force encryption + client-cert set.
  };
 
  constexpr TransportConstraints(Constraint val) : val_(val) {}
 
  [[nodiscard]] constexpr Constraint constraint() const { return val_; }
 
  [[nodiscard]] std::string to_string() const {
    switch (val_) {
      case Constraint::kPlaintext:
        return "plaintext";
      case Constraint::kSecure:
        return "secure";
      case Constraint::kEncrypted:
        return "encrypted";
      case Constraint::kHasClientCert:
        return "has-client-cert";
    };
 
    return "unknown";
  }
 
 private:
  Constraint val_;
};
 
#endif