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message AuthzPolicy {
  // Optional. List of permissions to publish Data Tunnel publications.
  repeated Publisher publisher = 4;

  // Optional. List of permissions to discover and subscribe to Data Tunnel
  // publications.
  repeated Subscriber subscriber = 5;

  // Optional. List of permissions to serve an RPC server.
  repeated Server server = 6;

  // Optional. List of permissions to discover and call methods of an RPC
  // server.
  repeated Client client = 7;

  // Optional. Allow blanket "read" permission.
  //
  // Gives permission to discover and call all methods of all RPC servers,
  // as well as discover and subscribe to all publications.
  //
  // WARNING: This flag grants elevated permissions and should be used with a
  // good reason and for privileged agents only (e.g. Telemetry).
  bool allow_read_all = 8;
}

// Defines a permission to publish Data Tunnel publications.
message Publisher {
  // Required. Publication's protobuf message name.
  string message = 1;

  // Topic(s) to which this permission allows to publish to.
  //
  // Setting this field or setting 'allow_all_topics == true' is required.
  repeated string topic = 2;

  // Flag indicates that Service Bundle is allowed to register publication
  // of the 'message' type with any 'topic'
  //
  // Should only be set to 'true' if the 'topic' field is not set.
  bool allow_all_topics = 3;
}

// Defines a permission to discover and subscribe to Data Tunnel publications.
message Subscriber {
  // Required. Publication's protobuf message name.
  string message = 1;

  // Topic(s) to which this permission allows to subscribe to.
  //
  // Setting this field or setting 'allow_all_topics == true' is required.
  repeated string topic = 2;

  // Flag indicates that Service Bundle is allowed to discover and subscribe to
  // all publications of the 'message' type.
  //
  // Should only be set to 'true' if the 'topic' field is not set.
  bool allow_all_topics = 3;
}

// Defines a permission to serve an RPC server.
message Server {
  // Required. Server's protobuf service name.
  string service = 1;

  // Channel(s) which this permission allows to register.
  //
  // Setting this field or setting 'allow_all_channels == true' is required.
  repeated string channel = 2;

  // Flag indicates that Service Bundle is allowed to register RPC servers
  // of the 'service' type with any 'channel'
  //
  // Should only be set to 'true' if the 'channel' field is not set.
  bool allow_all_channels = 3;
}

// Defines a permission to discover and call methods of an RPC server.
message Client {
  // Required. Server's protobuf service name.
  string service = 1;

  // Channel(s) which this permission allows to discover and call methods on.
  //
  // Setting this field or setting 'allow_all_channels == true' is required.
  repeated string channel = 2;

  // Flag indicates that Service Bundle is allowed to discover and call all RPC
  // servers of the 'service' type.
  //
  // Should only be set to 'true' if the 'channel' field is not set.
  bool allow_all_channels = 3;
}

# Allows this SB to register publication of TireStatus type with "left_tire" topic only.
publisher {
  message: "com.sdv.TireStatus"
  topic: "left_tire"
}

# Allows this SB to subscribe to publication of TireStatus type with "left_tire" topic only.
subscriber {
  message: "com.sdv.TireStatus"
  topic: "left_tire"
}

# Allows this SB to implement and serve UserPreferencesManager service on any channel.
server {
  service: "com.sdv.UserPreferencesManager"
  allow_all_channels: true
}

# Allows this SB to discover and call UserPreferencesManager service on any channel.
client {
  service: "com.sdv.UserPreferencesManager"
  allow_all_channels: true
}

# Blanket read permission for privileged agents (e.g. Telemetry).
allow_read_all: true