# Network Functions Access Network framework functions used in C. ## Topics ### Functions [`nw_advertise_descriptor_copy_txt_record_object`](/documentation/Network/nw_advertise_descriptor_copy_txt_record_object(_:)) Accesses the TXT record to advertise with the service. [`nw_advertise_descriptor_create_application_service`](/documentation/Network/nw_advertise_descriptor_create_application_service(_:)) [`nw_advertise_descriptor_create_bonjour_service`](/documentation/Network/nw_advertise_descriptor_create_bonjour_service(_:_:_:)) Initializes a Bonjour service to advertise. [`nw_advertise_descriptor_get_application_service_name`](/documentation/Network/nw_advertise_descriptor_get_application_service_name(_:)) [`nw_advertise_descriptor_get_no_auto_rename`](/documentation/Network/nw_advertise_descriptor_get_no_auto_rename(_:)) Checks whether the service prohibits automatic renaming in the event of a name conflict. [`nw_advertise_descriptor_set_no_auto_rename`](/documentation/Network/nw_advertise_descriptor_set_no_auto_rename(_:_:)) Sets a Boolean to indicate whether the service prohibits automatic renaming in the event of a name conflict. [`nw_advertise_descriptor_set_txt_record`](/documentation/Network/nw_advertise_descriptor_set_txt_record(_:_:_:)) Sets the TXT record as a raw buffer to advertise with the service. [`nw_advertise_descriptor_set_txt_record_object`](/documentation/Network/nw_advertise_descriptor_set_txt_record_object(_:_:)) Sets the TXT record to advertise with the service. [`nw_browse_descriptor_create_application_service`](/documentation/Network/nw_browse_descriptor_create_application_service(_:)) [`nw_browse_descriptor_create_bonjour_service`](/documentation/Network/nw_browse_descriptor_create_bonjour_service(_:_:)) Initializes a service descriptor used to discover a Bonjour service. [`nw_browse_descriptor_get_application_service_name`](/documentation/Network/nw_browse_descriptor_get_application_service_name(_:)) [`nw_browse_descriptor_get_bonjour_service_domain`](/documentation/Network/nw_browse_descriptor_get_bonjour_service_domain(_:)) Accesses the Bonjour service domain set on a browse descriptor. [`nw_browse_descriptor_get_bonjour_service_type`](/documentation/Network/nw_browse_descriptor_get_bonjour_service_type(_:)) Accesses the Bonjour service type set on a browse descriptor. [`nw_browse_descriptor_get_include_txt_record`](/documentation/Network/nw_browse_descriptor_get_include_txt_record(_:)) Checks if the browse descriptor requires including associated TXT records with all results. [`nw_browse_descriptor_set_include_txt_record`](/documentation/Network/nw_browse_descriptor_set_include_txt_record(_:_:)) Requires including associated TXT records with all results generated for this service descriptor. [`nw_browse_result_copy_endpoint`](/documentation/Network/nw_browse_result_copy_endpoint(_:)) The discovered service endpoint. [`nw_browse_result_copy_txt_record_object`](/documentation/Network/nw_browse_result_copy_txt_record_object(_:)) Accesses the TXT record associated with a discovered service. [`nw_browse_result_enumerate_interfaces`](/documentation/Network/nw_browse_result_enumerate_interfaces(_:_:)) Enumerates the list of interfaces on which the service was discovered. [`nw_browse_result_get_changes`](/documentation/Network/nw_browse_result_get_changes(_:_:)) Compares two discovered services and calculates changes between them. [`nw_browse_result_get_interfaces_count`](/documentation/Network/nw_browse_result_get_interfaces_count(_:)) Accesses the number of interfaces associated with a discovered service. [`nw_browser_cancel`](/documentation/Network/nw_browser_cancel(_:)) Stops browsing for services. [`nw_browser_copy_browse_descriptor`](/documentation/Network/nw_browser_copy_browse_descriptor(_:)) Accesses the service descriptor with which the browser was created. [`nw_browser_copy_parameters`](/documentation/Network/nw_browser_copy_parameters(_:)) Accesses the parameters with which the browser was created. [`nw_browser_create`](/documentation/Network/nw_browser_create(_:_:)) Initializes a browser with a type of service to discover. [`nw_browser_set_browse_results_changed_handler`](/documentation/Network/nw_browser_set_browse_results_changed_handler(_:_:)) Sets the handler to receive updates about discovered services. [`nw_browser_set_queue`](/documentation/Network/nw_browser_set_queue(_:_:)) Sets the queue on which all browser events will be delivered. [`nw_browser_set_state_changed_handler`](/documentation/Network/nw_browser_set_state_changed_handler(_:_:)) Sets a handler to receive browser state updates. [`nw_browser_start`](/documentation/Network/nw_browser_start(_:)) Starts browsing for services. [`nw_connection_access_establishment_report`](/documentation/Network/nw_connection_access_establishment_report(_:_:_:)) Requests a copy of the connection’s establishment report once the connection is in the ready state. [`nw_connection_batch`](/documentation/Network/nw_connection_batch(_:_:)) Defines a block in which calls to send and receive are processed as a batch to improve performance. [`nw_connection_cancel`](/documentation/Network/nw_connection_cancel(_:)) Cancels the connection and gracefully disconnects any established network protocols. [`nw_connection_cancel_current_endpoint`](/documentation/Network/nw_connection_cancel_current_endpoint(_:)) Causes the current endpoint to be rejected, allowing the connection to try another resolved address. [`nw_connection_copy_current_path`](/documentation/Network/nw_connection_copy_current_path(_:)) Accesses the network path the connection is using. [`nw_connection_copy_description`](/documentation/Network/nw_connection_copy_description(_:)) Copies the description of the connection as a string. [`nw_connection_copy_endpoint`](/documentation/Network/nw_connection_copy_endpoint(_:)) Accesses the endpoint with which the connection was created. [`nw_connection_copy_parameters`](/documentation/Network/nw_connection_copy_parameters(_:)) Accesses the parameters with which the connection was created. [`nw_connection_copy_protocol_metadata`](/documentation/Network/nw_connection_copy_protocol_metadata(_:_:)) Retrieves the connection-wide metadata for a specific protocol. [`nw_connection_create`](/documentation/Network/nw_connection_create(_:_:)) Initializes a new connection to a remote endpoint. [`nw_connection_create_new_data_transfer_report`](/documentation/Network/nw_connection_create_new_data_transfer_report(_:)) Begins a new data transfer report, which can later be collected. [`nw_connection_force_cancel`](/documentation/Network/nw_connection_force_cancel(_:)) Cancels the connection and immediately disconnects any established network protocols. [`nw_connection_get_maximum_datagram_size`](/documentation/Network/nw_connection_get_maximum_datagram_size(_:)) Accesses the maximum size of a datagram message that can be sent on a connection. [`nw_connection_group_cancel`](/documentation/Network/nw_connection_group_cancel(_:)) Cancels the connection group object and leaves the network group. [`nw_connection_group_copy_descriptor`](/documentation/Network/nw_connection_group_copy_descriptor(_:)) Accesses the descriptor of the group you use to initialize the connection group. [`nw_connection_group_copy_local_endpoint_for_message`](/documentation/Network/nw_connection_group_copy_local_endpoint_for_message(_:_:)) Accesses the local address and port you use to receive the message. [`nw_connection_group_copy_parameters`](/documentation/Network/nw_connection_group_copy_parameters(_:)) Accesses the parameters with which you initialize the connection group. [`nw_connection_group_copy_path_for_message`](/documentation/Network/nw_connection_group_copy_path_for_message(_:_:)) Accesses the network path on which you receive the message. [`nw_connection_group_copy_protocol_metadata`](/documentation/Network/nw_connection_group_copy_protocol_metadata(_:_:)) [`nw_connection_group_copy_protocol_metadata_for_message`](/documentation/Network/nw_connection_group_copy_protocol_metadata_for_message(_:_:_:)) [`nw_connection_group_copy_remote_endpoint_for_message`](/documentation/Network/nw_connection_group_copy_remote_endpoint_for_message(_:_:)) Accesses the endpoint that originates the message you receive. [`nw_connection_group_create`](/documentation/Network/nw_connection_group_create(_:_:)) Initializes a new connection group with a group identifier. [`nw_connection_group_extract_connection`](/documentation/Network/nw_connection_group_extract_connection(_:_:_:)) [`nw_connection_group_extract_connection_for_message`](/documentation/Network/nw_connection_group_extract_connection_for_message(_:_:)) Converts a message you receive from an endpoint into a connection object that you use for long-term communication with that endpoint. [`nw_connection_group_reinsert_extracted_connection`](/documentation/Network/nw_connection_group_reinsert_extracted_connection(_:_:)) [`nw_connection_group_reply`](/documentation/Network/nw_connection_group_reply(_:_:_:_:)) Sends a reply to the specific endpoint that originates a group message you receive. [`nw_connection_group_send_message`](/documentation/Network/nw_connection_group_send_message(_:_:_:_:_:)) Sends data to the entire group, or to a specific member of the group. [`nw_connection_group_set_new_connection_handler`](/documentation/Network/nw_connection_group_set_new_connection_handler(_:_:)) [`nw_connection_group_set_queue`](/documentation/Network/nw_connection_group_set_queue(_:_:)) Sets the queue on which you handle connection group events. [`nw_connection_group_set_receive_handler`](/documentation/Network/nw_connection_group_set_receive_handler(_:_:_:_:)) Sets a handler that receives inbound messages from members of the group. [`nw_connection_group_set_state_changed_handler`](/documentation/Network/nw_connection_group_set_state_changed_handler(_:_:)) Sets a handler that receives connection group state updates. [`nw_connection_group_start`](/documentation/Network/nw_connection_group_start(_:)) Joins the group and registers to receive messages. [`nw_connection_receive`](/documentation/Network/nw_connection_receive(_:_:_:_:)) Schedules a single receive completion handler, with a range indicating how many bytes the handler can receive at one time. [`nw_connection_receive_message`](/documentation/Network/nw_connection_receive_message(_:_:)) Schedules a single receive completion handler for a complete message, as opposed to a range of bytes. [`nw_connection_restart`](/documentation/Network/nw_connection_restart(_:)) Restarts a connection that is in the waiting state. [`nw_connection_send`](/documentation/Network/nw_connection_send(_:_:_:_:_:)) Sends data on a connection. [`nw_connection_set_better_path_available_handler`](/documentation/Network/nw_connection_set_better_path_available_handler(_:_:)) Sets a handler that receives updates when an alternative network path is preferred over the current path. [`nw_connection_set_path_changed_handler`](/documentation/Network/nw_connection_set_path_changed_handler(_:_:)) Sets a handler that receives network path updates. [`nw_connection_set_queue`](/documentation/Network/nw_connection_set_queue(_:_:)) Sets the queue on which all connection events are delivered. [`nw_connection_set_state_changed_handler`](/documentation/Network/nw_connection_set_state_changed_handler(_:_:)) Sets a handler to receive connection state updates. [`nw_connection_set_viability_changed_handler`](/documentation/Network/nw_connection_set_viability_changed_handler(_:_:)) Sets a handler that receives updates when data can be sent and received. [`nw_connection_start`](/documentation/Network/nw_connection_start(_:)) Starts establishing a connection. [`nw_content_context_copy_antecedent`](/documentation/Network/nw_content_context_copy_antecedent(_:)) Accesses the optional message context that must be sent before the context you are sending. [`nw_content_context_copy_protocol_metadata`](/documentation/Network/nw_content_context_copy_protocol_metadata(_:_:)) Retreives the metadata associated with a specific protocol. [`nw_content_context_create`](/documentation/Network/nw_content_context_create(_:)) Initializes a custom message context. [`nw_content_context_foreach_protocol_metadata`](/documentation/Network/nw_content_context_foreach_protocol_metadata(_:_:)) Iterates through all protocol metadata associated with the message context. [`nw_content_context_get_expiration_milliseconds`](/documentation/Network/nw_content_context_get_expiration_milliseconds(_:)) Accesses the expiration set for this message context. [`nw_content_context_get_identifier`](/documentation/Network/nw_content_context_get_identifier(_:)) Accesses the identifier used to create this message context. [`nw_content_context_get_is_final`](/documentation/Network/nw_content_context_get_is_final(_:)) Checks whether this context represents the final message being received. [`nw_content_context_get_relative_priority`](/documentation/Network/nw_content_context_get_relative_priority(_:)) Accesses the relative value of priority used to reorder contexts when sending. [`nw_content_context_set_antecedent`](/documentation/Network/nw_content_context_set_antecedent(_:_:)) Set an optional message context that must be sent before the context you are sending. [`nw_content_context_set_expiration_milliseconds`](/documentation/Network/nw_content_context_set_expiration_milliseconds(_:_:)) Sets the number of milliseconds after which sending the data associated with this context must begin, otherwise the data is discarded. [`nw_content_context_set_is_final`](/documentation/Network/nw_content_context_set_is_final(_:_:)) Sets a Boolean indicating if this context represents the final message being sent. [`nw_content_context_set_metadata_for_protocol`](/documentation/Network/nw_content_context_set_metadata_for_protocol(_:_:)) Sets protocol metadata to configure per-message or per-packet properties. [`nw_content_context_set_relative_priority`](/documentation/Network/nw_content_context_set_relative_priority(_:_:)) Sets the relative value of priority used to reorder contexts when sending. [`nw_data_transfer_report_collect`](/documentation/Network/nw_data_transfer_report_collect(_:_:_:)) Stops an outstanding data transfer report and calculates the results. [`nw_data_transfer_report_copy_path_interface`](/documentation/Network/nw_data_transfer_report_copy_path_interface(_:_:)) Accesses the network interface the path used. [`nw_data_transfer_report_get_duration_milliseconds`](/documentation/Network/nw_data_transfer_report_get_duration_milliseconds(_:)) Checks the duration of the data transfer report, from when it was started to when it was collected. [`nw_data_transfer_report_get_path_count`](/documentation/Network/nw_data_transfer_report_get_path_count(_:)) Checks the number of valid paths in the report. [`nw_data_transfer_report_get_path_radio_type`](/documentation/Network/nw_data_transfer_report_get_path_radio_type(_:_:)) [`nw_data_transfer_report_get_received_application_byte_count`](/documentation/Network/nw_data_transfer_report_get_received_application_byte_count(_:_:)) Accesses the number of bytes the connection delivered. [`nw_data_transfer_report_get_received_ip_packet_count`](/documentation/Network/nw_data_transfer_report_get_received_ip_packet_count(_:_:)) Accesses the number of IP packets the connection received. [`nw_data_transfer_report_get_received_transport_byte_count`](/documentation/Network/nw_data_transfer_report_get_received_transport_byte_count(_:_:)) Accesses the number of bytes the transport protocol delivered. [`nw_data_transfer_report_get_received_transport_duplicate_byte_count`](/documentation/Network/nw_data_transfer_report_get_received_transport_duplicate_byte_count(_:_:)) Accesses the number of duplicated bytes the transport protocol detected. [`nw_data_transfer_report_get_received_transport_out_of_order_byte_count`](/documentation/Network/nw_data_transfer_report_get_received_transport_out_of_order_byte_count(_:_:)) Accesses the number of bytes the transport protocol received out of order. [`nw_data_transfer_report_get_sent_application_byte_count`](/documentation/Network/nw_data_transfer_report_get_sent_application_byte_count(_:_:)) Accesses the number of bytes sent on the connection. [`nw_data_transfer_report_get_sent_ip_packet_count`](/documentation/Network/nw_data_transfer_report_get_sent_ip_packet_count(_:_:)) Accesses the number of IP packets the connection sent. [`nw_data_transfer_report_get_sent_transport_byte_count`](/documentation/Network/nw_data_transfer_report_get_sent_transport_byte_count(_:_:)) Accesses the number of bytes sent into the transport protocol. [`nw_data_transfer_report_get_sent_transport_retransmitted_byte_count`](/documentation/Network/nw_data_transfer_report_get_sent_transport_retransmitted_byte_count(_:_:)) Accesses the number of bytes the transport protocol retransmitted. [`nw_data_transfer_report_get_state`](/documentation/Network/nw_data_transfer_report_get_state(_:)) Checks whether a data transfer report is collected. [`nw_data_transfer_report_get_transport_minimum_rtt_milliseconds`](/documentation/Network/nw_data_transfer_report_get_transport_minimum_rtt_milliseconds(_:_:)) Accesses the minimum round-trip time the transport protocol measured, in milliseconds. [`nw_data_transfer_report_get_transport_rtt_variance`](/documentation/Network/nw_data_transfer_report_get_transport_rtt_variance(_:_:)) Accesses the variance of the round-trip time the transport protocol measured. [`nw_data_transfer_report_get_transport_smoothed_rtt_milliseconds`](/documentation/Network/nw_data_transfer_report_get_transport_smoothed_rtt_milliseconds(_:_:)) Accesses the smoothed round-trip time the transport protocol measured, in milliseconds. [`nw_endpoint_copy_address_string`](/documentation/Network/nw_endpoint_copy_address_string(_:)) Copies the address of an endpoint as a string. [`nw_endpoint_copy_port_string`](/documentation/Network/nw_endpoint_copy_port_string(_:)) Copies the port of an endpoint as a string. [`nw_endpoint_copy_txt_record`](/documentation/Network/nw_endpoint_copy_txt_record(_:)) [`nw_endpoint_create_address`](/documentation/Network/nw_endpoint_create_address(_:)) Creates a network endpoint with an address structure. [`nw_endpoint_create_bonjour_service`](/documentation/Network/nw_endpoint_create_bonjour_service(_:_:_:)) Creates a network endpoint with a Bonjour service name, type, and domain. [`nw_endpoint_create_host`](/documentation/Network/nw_endpoint_create_host(_:_:)) Creates a network endpoint with a hostname and port, where the hostname may be interpreted as an IP address. [`nw_endpoint_create_url`](/documentation/Network/nw_endpoint_create_url(_:)) Creates a network endpoint with a URL string. [`nw_endpoint_get_address`](/documentation/Network/nw_endpoint_get_address(_:)) Accesses the address structure stored in an address endpoint. [`nw_endpoint_get_bonjour_service_domain`](/documentation/Network/nw_endpoint_get_bonjour_service_domain(_:)) Accesses the Bonjour service domain stored in an endpoint. [`nw_endpoint_get_bonjour_service_name`](/documentation/Network/nw_endpoint_get_bonjour_service_name(_:)) Accesses the Bonjour service name stored in an endpoint. [`nw_endpoint_get_bonjour_service_type`](/documentation/Network/nw_endpoint_get_bonjour_service_type(_:)) Accesses the Bonjour service type stored in an endpoint. [`nw_endpoint_get_hostname`](/documentation/Network/nw_endpoint_get_hostname(_:)) Accesses the hostname stored in an endpoint. [`nw_endpoint_get_port`](/documentation/Network/nw_endpoint_get_port(_:)) Accesses the port stored in an endpoint, in host-byte order. [`nw_endpoint_get_signature`](/documentation/Network/nw_endpoint_get_signature(_:_:)) [`nw_endpoint_get_type`](/documentation/Network/nw_endpoint_get_type(_:)) Accesses the type of a endpoint. [`nw_endpoint_get_url`](/documentation/Network/nw_endpoint_get_url(_:)) Accesses the URL string stored in an endpoint. [`nw_error_copy_cf_error`](/documentation/Network/nw_error_copy_cf_error(_:)) Returns a copy of a network error. [`nw_error_get_error_code`](/documentation/Network/nw_error_get_error_code(_:)) Accesses the specific code of the network error. [`nw_error_get_error_domain`](/documentation/Network/nw_error_get_error_domain(_:)) Accesses the domain of the network error. [`nw_establishment_report_copy_proxy_endpoint`](/documentation/Network/nw_establishment_report_copy_proxy_endpoint(_:)) Accesses the endpoint of the proxy the connection used. [`nw_establishment_report_enumerate_protocols`](/documentation/Network/nw_establishment_report_enumerate_protocols(_:_:)) Iterates a list of protocol handshakes in order from first completed to last completed. [`nw_establishment_report_enumerate_resolution_reports`](/documentation/Network/nw_establishment_report_enumerate_resolution_reports(_:_:)) [`nw_establishment_report_enumerate_resolutions`](/documentation/Network/nw_establishment_report_enumerate_resolutions(_:_:)) Iterates a list of resolution steps performed during connection establishment, in order from first resolved to last resolved. [`nw_establishment_report_get_attempt_started_after_milliseconds`](/documentation/Network/nw_establishment_report_get_attempt_started_after_milliseconds(_:)) Accesses the time between the call to start and the beginning of the successful connection attempt, in milliseconds. [`nw_establishment_report_get_duration_milliseconds`](/documentation/Network/nw_establishment_report_get_duration_milliseconds(_:)) Checks the total duration of the successful connection establishment attempt, from the preparing state to the ready state. [`nw_establishment_report_get_previous_attempt_count`](/documentation/Network/nw_establishment_report_get_previous_attempt_count(_:)) Checks the number of attempts made before the successful attempt, when the connection moved from the preparing state back to the waiting state. [`nw_establishment_report_get_proxy_configured`](/documentation/Network/nw_establishment_report_get_proxy_configured(_:)) Checks whether a proxy was configured on the connection. [`nw_establishment_report_get_used_proxy`](/documentation/Network/nw_establishment_report_get_used_proxy(_:)) Checks whether the connection used a proxy. [`nw_ethernet_channel_cancel`](/documentation/Network/nw_ethernet_channel_cancel(_:)) Unregisters the channel from the interface. [`nw_ethernet_channel_create`](/documentation/Network/nw_ethernet_channel_create(_:_:)) Initializes an Ethernet channel on a specific interface with a custom Ethernet type. [`nw_ethernet_channel_create_with_parameters`](/documentation/Network/nw_ethernet_channel_create_with_parameters(_:_:_:)) [`nw_ethernet_channel_get_maximum_payload_size`](/documentation/Network/nw_ethernet_channel_get_maximum_payload_size(_:)) [`nw_ethernet_channel_send`](/documentation/Network/nw_ethernet_channel_send(_:_:_:_:_:)) Sends a single Ethernet frame over a channel to a specific Ethernet address. [`nw_ethernet_channel_set_queue`](/documentation/Network/nw_ethernet_channel_set_queue(_:_:)) Sets the queue on which all channel events are delivered. [`nw_ethernet_channel_set_receive_handler`](/documentation/Network/nw_ethernet_channel_set_receive_handler(_:_:)) Sets a handler to receive inbound Ethernet frames. [`nw_ethernet_channel_set_state_changed_handler`](/documentation/Network/nw_ethernet_channel_set_state_changed_handler(_:_:)) Sets a handler to receive channel state updates. [`nw_ethernet_channel_start`](/documentation/Network/nw_ethernet_channel_start(_:)) Starts the process of registering the channel. [`nw_framer_async`](/documentation/Network/nw_framer_async(_:_:)) Requests that a block be executed on the connection’s internal scheduling context. [`nw_framer_copy_local_endpoint`](/documentation/Network/nw_framer_copy_local_endpoint(_:)) Accesses the local endpoint of the connection in which your protocol is running. [`nw_framer_copy_options`](/documentation/Network/nw_framer_copy_options(_:)) [`nw_framer_copy_parameters`](/documentation/Network/nw_framer_copy_parameters(_:)) Accesses the parameters of the connection in which your protocol is running. [`nw_framer_copy_remote_endpoint`](/documentation/Network/nw_framer_copy_remote_endpoint(_:)) Accesses the remote endpoint of the connection in which your protocol is running. [`nw_framer_create_definition`](/documentation/Network/nw_framer_create_definition(_:_:_:)) Initializes a new protocol definition based on your protocol implementation. [`nw_framer_create_options`](/documentation/Network/nw_framer_create_options(_:)) Initializes a set of protocol options with a custom framer definition. [`nw_framer_deliver_input`](/documentation/Network/nw_framer_deliver_input(_:_:_:_:_:)) Delivers an inbound message containing arbitrary data from your protocol to the application. [`nw_framer_deliver_input_no_copy`](/documentation/Network/nw_framer_deliver_input_no_copy(_:_:_:_:)) Delivers an inbound message containing a specific number of next received bytes. [`nw_framer_mark_failed_with_error`](/documentation/Network/nw_framer_mark_failed_with_error(_:_:)) Indicates to a connection that your protocol has encountered an error, or has gracefully closed. [`nw_framer_mark_ready`](/documentation/Network/nw_framer_mark_ready(_:)) Indicates to a connection that your protocol’s handshake is complete. [`nw_framer_message_access_value`](/documentation/Network/nw_framer_message_access_value(_:_:_:)) Accesses a custom value stored in a framer message. [`nw_framer_message_copy_object_value`](/documentation/Network/nw_framer_message_copy_object_value(_:_:)) Accesses an NSObject value stored in a framer message. [`nw_framer_message_create`](/documentation/Network/nw_framer_message_create(_:)) Initializes an empty message from within a framer implementation. [`nw_framer_message_set_object_value`](/documentation/Network/nw_framer_message_set_object_value(_:_:_:)) Sets an NSObject value to be stored in a framer message. [`nw_framer_message_set_value`](/documentation/Network/nw_framer_message_set_value(_:_:_:_:)) Sets a value to be stored in a framer message, with a completion to call to disposed the stored value when the message is released. [`nw_framer_options_copy_object_value`](/documentation/Network/nw_framer_options_copy_object_value(_:_:)) [`nw_framer_options_set_object_value`](/documentation/Network/nw_framer_options_set_object_value(_:_:_:)) [`nw_framer_parse_input`](/documentation/Network/nw_framer_parse_input(_:_:_:_:_:)) Examines the content of input data while inside your input handler block. [`nw_framer_parse_output`](/documentation/Network/nw_framer_parse_output(_:_:_:_:_:)) Examines the content of output data while inside your output handler. [`nw_framer_pass_through_input`](/documentation/Network/nw_framer_pass_through_input(_:)) Indicates that your protocol no longer needs to handle input data. [`nw_framer_pass_through_output`](/documentation/Network/nw_framer_pass_through_output(_:)) Indicates that your protocol no longer needs to handle output data. [`nw_framer_prepend_application_protocol`](/documentation/Network/nw_framer_prepend_application_protocol(_:_:)) Dynamically adds another protocol that will run above your protocol after your protocol calls [`nw_framer_mark_ready(_:)`](/documentation/Network/nw_framer_mark_ready(_:)). [`nw_framer_protocol_create_message`](/documentation/Network/nw_framer_protocol_create_message(_:)) Initializes an empty message for a custom framer definition. [`nw_framer_schedule_wakeup`](/documentation/Network/nw_framer_schedule_wakeup(_:_:)) Requests that the [`nw_framer_wakeup_handler_t`](/documentation/Network/nw_framer_wakeup_handler_t) be called on your protocol at a specific time in the future. [`nw_framer_set_cleanup_handler`](/documentation/Network/nw_framer_set_cleanup_handler(_:_:)) Sets a block to handle the final cleanup of allocations made by your protocol instance. [`nw_framer_set_input_handler`](/documentation/Network/nw_framer_set_input_handler(_:_:)) Sets a block to handle new inbound data. [`nw_framer_set_output_handler`](/documentation/Network/nw_framer_set_output_handler(_:_:)) Sets a block to handle new outbound messages. [`nw_framer_set_stop_handler`](/documentation/Network/nw_framer_set_stop_handler(_:_:)) Sets a block to handle when the connection is being closed. [`nw_framer_set_wakeup_handler`](/documentation/Network/nw_framer_set_wakeup_handler(_:_:)) Sets a handler to receive scheduled wakeup events. [`nw_framer_write_output`](/documentation/Network/nw_framer_write_output(_:_:_:)) Sends arbitrary output data in a buffer from your protocol to the next protocol. [`nw_framer_write_output_data`](/documentation/Network/nw_framer_write_output_data(_:_:)) Sends arbitrary output data from your protocol to the next protocol. [`nw_framer_write_output_no_copy`](/documentation/Network/nw_framer_write_output_no_copy(_:_:)) Sends a specific number of bytes from a message while inside your output handler. [`nw_group_descriptor_add_endpoint`](/documentation/Network/nw_group_descriptor_add_endpoint(_:_:)) Adds a multicast address endpoint you specify to define an extra IP multicast group to join. [`nw_group_descriptor_create_multicast`](/documentation/Network/nw_group_descriptor_create_multicast(_:)) Creates group descriptor you use to join an IP multicast group on a local network. [`nw_group_descriptor_create_multiplex`](/documentation/Network/nw_group_descriptor_create_multiplex(_:)) [`nw_group_descriptor_enumerate_endpoints`](/documentation/Network/nw_group_descriptor_enumerate_endpoints(_:_:)) Sets a handler to list all endpoints added to the group descriptor. [`nw_interface_get_index`](/documentation/Network/nw_interface_get_index(_:)) Accesses the system interface index associated with the interface. [`nw_interface_get_name`](/documentation/Network/nw_interface_get_name(_:)) Accesses the name of the interface. [`nw_interface_get_type`](/documentation/Network/nw_interface_get_type(_:)) Accesses the type of the interface, such as Wi-Fi or Loopback. [`nw_ip_create_metadata`](/documentation/Network/nw_ip_create_metadata()) Initializes an IP packet configuration with default settings. [`nw_ip_metadata_get_ecn_flag`](/documentation/Network/nw_ip_metadata_get_ecn_flag(_:)) Checks the Explicit Congestion Notification flag value received on an IP packet. [`nw_ip_metadata_get_receive_time`](/documentation/Network/nw_ip_metadata_get_receive_time(_:)) Access the time at which a packet was received, in nanoseconds, based on `CLOCK_MONOTONIC_RAW`. [`nw_ip_metadata_get_service_class`](/documentation/Network/nw_ip_metadata_get_service_class(_:)) Accesses a specific service class to mark on an IP packet. [`nw_ip_metadata_set_ecn_flag`](/documentation/Network/nw_ip_metadata_set_ecn_flag(_:_:)) Sets a specific Explicit Congestion Notification flag value to set on an IP packet. [`nw_ip_metadata_set_service_class`](/documentation/Network/nw_ip_metadata_set_service_class(_:_:)) Sets a specific service class to mark on an IP packet. [`nw_ip_options_set_calculate_receive_time`](/documentation/Network/nw_ip_options_set_calculate_receive_time(_:_:)) Configures a connection to deliver receive timestamps for IP packets. [`nw_ip_options_set_disable_fragmentation`](/documentation/Network/nw_ip_options_set_disable_fragmentation(_:_:)) Configures a connection to disable fragmentation on outbound packets. [`nw_ip_options_set_disable_multicast_loopback`](/documentation/Network/nw_ip_options_set_disable_multicast_loopback(_:_:)) [`nw_ip_options_set_hop_limit`](/documentation/Network/nw_ip_options_set_hop_limit(_:_:)) Configures the default hop limit for packets generated by a connection. [`nw_ip_options_set_local_address_preference`](/documentation/Network/nw_ip_options_set_local_address_preference(_:_:)) Configures a connection to prefer certain types of local addresses, such as temporary or stable. [`nw_ip_options_set_use_minimum_mtu`](/documentation/Network/nw_ip_options_set_use_minimum_mtu(_:_:)) Configures a connection to use the minimum MTU value, which is 1280 bytes for IPv6. [`nw_ip_options_set_version`](/documentation/Network/nw_ip_options_set_version(_:_:)) Sets a required IP version to disable all other versions for a connection. [`nw_listener_cancel`](/documentation/Network/nw_listener_cancel(_:)) Stops listening for inbound connections. [`nw_listener_create`](/documentation/Network/nw_listener_create(_:)) Initializes a network listener, which will select a random port. [`nw_listener_create_with_connection`](/documentation/Network/nw_listener_create_with_connection(_:_:)) Initializes a network listener to receive new streams on a multiplexed connection. [`nw_listener_create_with_launchd_key`](/documentation/Network/nw_listener_create_with_launchd_key(_:_:)) [`nw_listener_create_with_port`](/documentation/Network/nw_listener_create_with_port(_:_:)) Initializes a network listener with a specified local port. [`nw_listener_get_new_connection_limit`](/documentation/Network/nw_listener_get_new_connection_limit(_:)) Checks the remaining number of inbound connections to deliver before rejecting connections. [`nw_listener_get_port`](/documentation/Network/nw_listener_get_port(_:)) The port on which the listener can accept connections. [`nw_listener_set_advertise_descriptor`](/documentation/Network/nw_listener_set_advertise_descriptor(_:_:)) Sets a Bonjour service that advertises the listener on the local network. [`nw_listener_set_advertised_endpoint_changed_handler`](/documentation/Network/nw_listener_set_advertised_endpoint_changed_handler(_:_:)) Sets a handler that receives updates for the service endpoint being advertised. [`nw_listener_set_new_connection_group_handler`](/documentation/Network/nw_listener_set_new_connection_group_handler(_:_:)) [`nw_listener_set_new_connection_handler`](/documentation/Network/nw_listener_set_new_connection_handler(_:_:)) Sets a handler that receives inbound connections. [`nw_listener_set_new_connection_limit`](/documentation/Network/nw_listener_set_new_connection_limit(_:_:)) Resets the number of inbound connections to deliver before rejecting connections. [`nw_listener_set_queue`](/documentation/Network/nw_listener_set_queue(_:_:)) Sets the queue on which all listener events are delivered. [`nw_listener_set_state_changed_handler`](/documentation/Network/nw_listener_set_state_changed_handler(_:_:)) Sets a handler to receive listener state updates. [`nw_listener_start`](/documentation/Network/nw_listener_start(_:)) Registers for listening for inbound connections. [`nw_multicast_group_descriptor_get_disable_unicast_traffic`](/documentation/Network/nw_multicast_group_descriptor_get_disable_unicast_traffic(_:)) Checks a Boolean that indicates whether a connection group should reject unicast traffic. [`nw_multicast_group_descriptor_set_disable_unicast_traffic`](/documentation/Network/nw_multicast_group_descriptor_set_disable_unicast_traffic(_:_:)) Sets a Boolean that indicates whether a connection group should reject unicast traffic. [`nw_multicast_group_descriptor_set_specific_source`](/documentation/Network/nw_multicast_group_descriptor_set_specific_source(_:_:)) Sets an optional address endpoint used to filter received multicast packets. [`nw_parameters_create_application_service`](/documentation/Network/nw_parameters_create_application_service()) [`nw_parameters_create_quic`](/documentation/Network/nw_parameters_create_quic(_:)) Initializes parameters for QUIC connections and listeners. [`nw_parameters_requires_dnssec_validation`](/documentation/Network/nw_parameters_requires_dnssec_validation(_:)) Checks whether a connection requires DNSSEC validation when resolving endpoints. [`nw_parameters_set_requires_dnssec_validation`](/documentation/Network/nw_parameters_set_requires_dnssec_validation(_:_:)) Determines whether a connection requires DNSSEC validation when resolving endpoints. [`nw_path_copy_effective_local_endpoint`](/documentation/Network/nw_path_copy_effective_local_endpoint(_:)) Accesses the local endpoint in use by a connection’s network path. [`nw_path_copy_effective_remote_endpoint`](/documentation/Network/nw_path_copy_effective_remote_endpoint(_:)) Accesses the remote endpoint in use by a connection’s network path. [`nw_path_enumerate_gateways`](/documentation/Network/nw_path_enumerate_gateways(_:_:)) Enumerates the list of gateways configured on the interfaces available to a path. [`nw_path_enumerate_interfaces`](/documentation/Network/nw_path_enumerate_interfaces(_:_:)) Enumerates the list of all interfaces available to the path, in order of preference. [`nw_path_get_status`](/documentation/Network/nw_path_get_status(_:)) Checks whether a path can be used by connections. [`nw_path_get_unsatisfied_reason`](/documentation/Network/nw_path_get_unsatisfied_reason(_:)) [`nw_path_has_dns`](/documentation/Network/nw_path_has_dns(_:)) Checks whether the path has a DNS server configured. [`nw_path_has_ipv4`](/documentation/Network/nw_path_has_ipv4(_:)) Checks whether the path can route IPv4 traffic. [`nw_path_has_ipv6`](/documentation/Network/nw_path_has_ipv6(_:)) Checks whether the path can route IPv6 traffic. [`nw_path_is_constrained`](/documentation/Network/nw_path_is_constrained(_:)) Checks whether the path uses an interface in Low Data Mode. [`nw_path_is_equal`](/documentation/Network/nw_path_is_equal(_:_:)) Compares if two paths are identical. [`nw_path_is_expensive`](/documentation/Network/nw_path_is_expensive(_:)) Checks whether the path uses an interface that is considered expensive, such as Cellular or a Personal Hotspot. [`nw_path_monitor_cancel`](/documentation/Network/nw_path_monitor_cancel(_:)) Stops receiving network path updates. [`nw_path_monitor_create`](/documentation/Network/nw_path_monitor_create()) Initializes a path monitor to observe all available interface types. [`nw_path_monitor_create_for_ethernet_channel`](/documentation/Network/nw_path_monitor_create_for_ethernet_channel()) [`nw_path_monitor_create_with_type`](/documentation/Network/nw_path_monitor_create_with_type(_:)) Initializes a path monitor to observe a specific interface type. [`nw_path_monitor_prohibit_interface_type`](/documentation/Network/nw_path_monitor_prohibit_interface_type(_:_:)) Prohibit a path monitor from using a specific interface type. [`nw_path_monitor_set_cancel_handler`](/documentation/Network/nw_path_monitor_set_cancel_handler(_:_:)) Sets a handler to determine when a monitor is fully cancelled and will no longer deliver events. [`nw_path_monitor_set_queue`](/documentation/Network/nw_path_monitor_set_queue(_:_:)) Sets a queue on which to deliver path events. [`nw_path_monitor_set_update_handler`](/documentation/Network/nw_path_monitor_set_update_handler(_:_:)) Sets a handler to receive network path updates. [`nw_path_monitor_start`](/documentation/Network/nw_path_monitor_start(_:)) Starts monitoring path changes. [`nw_path_uses_interface_type`](/documentation/Network/nw_path_uses_interface_type(_:_:)) Checks if connections using the path may send traffic over a specific interface type. [`nw_protocol_copy_ip_definition`](/documentation/Network/nw_protocol_copy_ip_definition()) Accesses the system definition of the Internet Protocol. [`nw_protocol_copy_quic_definition`](/documentation/Network/nw_protocol_copy_quic_definition()) Accesses the system definition of the QUIC transport protocol. [`nw_protocol_copy_tcp_definition`](/documentation/Network/nw_protocol_copy_tcp_definition()) Accesses the system definition of the Transport Control Protocol. [`nw_protocol_copy_tls_definition`](/documentation/Network/nw_protocol_copy_tls_definition()) Accesses the system definition of the Transport Layer Security protocol. [`nw_protocol_copy_udp_definition`](/documentation/Network/nw_protocol_copy_udp_definition()) Accesses the system definition of the User Datagram Protocol. [`nw_protocol_copy_ws_definition`](/documentation/Network/nw_protocol_copy_ws_definition()) Accesses the system definition of the WebSocket protocol. [`nw_protocol_metadata_copy_definition`](/documentation/Network/nw_protocol_metadata_copy_definition(_:)) Accesses the protocol definition associated with the metadata object. [`nw_protocol_metadata_is_framer_message`](/documentation/Network/nw_protocol_metadata_is_framer_message(_:)) Checks if a metadata object represents a custom framer protocol message. [`nw_protocol_metadata_is_ip`](/documentation/Network/nw_protocol_metadata_is_ip(_:)) Checks whether a metadata object represents an IP packet. [`nw_protocol_metadata_is_quic`](/documentation/Network/nw_protocol_metadata_is_quic(_:)) Checks whether a metadata object contains QUIC connection state. [`nw_protocol_metadata_is_tcp`](/documentation/Network/nw_protocol_metadata_is_tcp(_:)) Checks whether a metadata object contains TCP connection state. [`nw_protocol_metadata_is_tls`](/documentation/Network/nw_protocol_metadata_is_tls(_:)) Checks whether a metadata object contains TLS connection state. [`nw_protocol_metadata_is_udp`](/documentation/Network/nw_protocol_metadata_is_udp(_:)) Checks whether a metadata object represents a UDP datagram. [`nw_protocol_metadata_is_ws`](/documentation/Network/nw_protocol_metadata_is_ws(_:)) Checks whether a metadata object represents a WebSocket message. [`nw_protocol_options_is_quic`](/documentation/Network/nw_protocol_options_is_quic(_:)) Checks whether an options object uses the QUIC protocol. [`nw_proxy_config_add_excluded_domain`](/documentation/Network/nw_proxy_config_add_excluded_domain(_:_:)) [`nw_proxy_config_add_match_domain`](/documentation/Network/nw_proxy_config_add_match_domain(_:_:)) [`nw_proxy_config_clear_excluded_domains`](/documentation/Network/nw_proxy_config_clear_excluded_domains(_:)) [`nw_proxy_config_clear_match_domains`](/documentation/Network/nw_proxy_config_clear_match_domains(_:)) [`nw_proxy_config_enumerate_excluded_domains`](/documentation/Network/nw_proxy_config_enumerate_excluded_domains(_:_:)) [`nw_proxy_config_enumerate_match_domains`](/documentation/Network/nw_proxy_config_enumerate_match_domains(_:_:)) [`nw_quic_add_tls_application_protocol`](/documentation/Network/nw_quic_add_tls_application_protocol(_:_:)) Adds a supported Application-Layer Protocol Negotiation value. [`nw_quic_copy_sec_protocol_metadata`](/documentation/Network/nw_quic_copy_sec_protocol_metadata(_:)) Accesses the result of the QUIC handshake. [`nw_quic_copy_sec_protocol_options`](/documentation/Network/nw_quic_copy_sec_protocol_options(_:)) Accesses the handshake security options QUIC will use. [`nw_quic_create_options`](/documentation/Network/nw_quic_create_options()) Initializes a default set of QUIC connection options. [`nw_quic_get_application_error`](/documentation/Network/nw_quic_get_application_error(_:)) Accesses the QUIC application error code received from the peer. [`nw_quic_get_application_error_reason`](/documentation/Network/nw_quic_get_application_error_reason(_:)) Accesses the QUIC application error reason received from the peer. [`nw_quic_get_idle_timeout`](/documentation/Network/nw_quic_get_idle_timeout(_:)) Accesses the idle timeout for the QUIC connection, in milliseconds. [`nw_quic_get_initial_max_data`](/documentation/Network/nw_quic_get_initial_max_data(_:)) Accesses a QUIC connection’s initial maximum data transport parameter. [`nw_quic_get_initial_max_stream_data_bidirectional_local`](/documentation/Network/nw_quic_get_initial_max_stream_data_bidirectional_local(_:)) Accesses a QUIC connection’s initial maximum stream data limit for locally-initiated bidirectional streams. [`nw_quic_get_initial_max_stream_data_bidirectional_remote`](/documentation/Network/nw_quic_get_initial_max_stream_data_bidirectional_remote(_:)) Accesses a QUIC connection’s initial maximum stream data limit for remote-initiated bidirectional streams. [`nw_quic_get_initial_max_stream_data_unidirectional`](/documentation/Network/nw_quic_get_initial_max_stream_data_unidirectional(_:)) Accesses a QUIC connection’s initial maximum stream data limit for unidirectional streams. [`nw_quic_get_initial_max_streams_bidirectional`](/documentation/Network/nw_quic_get_initial_max_streams_bidirectional(_:)) Accesses a QUIC connection’s initial maximum number of bidirectional streams. [`nw_quic_get_initial_max_streams_unidirectional`](/documentation/Network/nw_quic_get_initial_max_streams_unidirectional(_:)) Accesses a QUIC connection’s initial maximum number of unidirectional streams. [`nw_quic_get_keepalive_interval`](/documentation/Network/nw_quic_get_keepalive_interval(_:)) Accesses the keepalive interval for the QUIC connection, in seconds. [`nw_quic_get_local_max_streams_bidirectional`](/documentation/Network/nw_quic_get_local_max_streams_bidirectional(_:)) Accesses the maximum number of bidirectional streams that the peer can create on a QUIC connection. [`nw_quic_get_local_max_streams_unidirectional`](/documentation/Network/nw_quic_get_local_max_streams_unidirectional(_:)) Accesses the maximum number of unidirectional streams that the peer can create on a QUIC connection. [`nw_quic_get_max_datagram_frame_size`](/documentation/Network/nw_quic_get_max_datagram_frame_size(_:)) Accesses a QUIC connection’s maximum DATAGRAM frame size. [`nw_quic_get_max_udp_payload_size`](/documentation/Network/nw_quic_get_max_udp_payload_size(_:)) Accesses the maximum length of a QUIC packet that can be received on a connection, in bytes. [`nw_quic_get_remote_idle_timeout`](/documentation/Network/nw_quic_get_remote_idle_timeout(_:)) Accesses the idle timeout value from the peer’s transport parameters, in milliseconds. [`nw_quic_get_remote_max_streams_bidirectional`](/documentation/Network/nw_quic_get_remote_max_streams_bidirectional(_:)) Accesses the maximum number of bidirectional streams advertised by peer that the connection is allowed to create. [`nw_quic_get_remote_max_streams_unidirectional`](/documentation/Network/nw_quic_get_remote_max_streams_unidirectional(_:)) Accesses the maximum number of unidirectional streams advertised by peer that the connection is allowed to create. [`nw_quic_get_stream_application_error`](/documentation/Network/nw_quic_get_stream_application_error(_:)) Accesses the QUIC application error code received from the peer for the stream. [`nw_quic_get_stream_id`](/documentation/Network/nw_quic_get_stream_id(_:)) Accesses the QUIC stream identifier. [`nw_quic_get_stream_is_datagram`](/documentation/Network/nw_quic_get_stream_is_datagram(_:)) Checks if a QUIC stream is a datagram flow, instead of a byte stream. [`nw_quic_get_stream_is_unidirectional`](/documentation/Network/nw_quic_get_stream_is_unidirectional(_:)) Checks if a QUIC stream is unidirectional, instead of bidirectional. [`nw_quic_get_stream_type`](/documentation/Network/nw_quic_get_stream_type(_:)) Accesses the stream type of the QUIC stream. [`nw_quic_get_stream_usable_datagram_frame_size`](/documentation/Network/nw_quic_get_stream_usable_datagram_frame_size(_:)) Accesses the maximum usable size of a datagram frame on a QUIC datagram flow. [`nw_quic_set_application_error`](/documentation/Network/nw_quic_set_application_error(_:_:_:)) Sets the QUIC application error code to send for the connection. [`nw_quic_set_idle_timeout`](/documentation/Network/nw_quic_set_idle_timeout(_:_:)) Sets the idle timeout for the QUIC connection, in milliseconds. [`nw_quic_set_initial_max_data`](/documentation/Network/nw_quic_set_initial_max_data(_:_:)) Sets a QUIC connection’s initial maximum data transport parameter. [`nw_quic_set_initial_max_stream_data_bidirectional_local`](/documentation/Network/nw_quic_set_initial_max_stream_data_bidirectional_local(_:_:)) Sets a QUIC connection’s initial maximum stream data limit for locally-initiated bidirectional streams. [`nw_quic_set_initial_max_stream_data_bidirectional_remote`](/documentation/Network/nw_quic_set_initial_max_stream_data_bidirectional_remote(_:_:)) Sets a QUIC connection’s initial maximum stream data limit for remote-initiated bidirectional streams. [`nw_quic_set_initial_max_stream_data_unidirectional`](/documentation/Network/nw_quic_set_initial_max_stream_data_unidirectional(_:_:)) Sets a QUIC connection’s initial maximum stream data limit for unidirectional streams. [`nw_quic_set_initial_max_streams_bidirectional`](/documentation/Network/nw_quic_set_initial_max_streams_bidirectional(_:_:)) Sets a QUIC connection’s initial maximum number of bidirectional streams. [`nw_quic_set_initial_max_streams_unidirectional`](/documentation/Network/nw_quic_set_initial_max_streams_unidirectional(_:_:)) Sets a QUIC connection’s initial maximum number of unidirectional streams. [`nw_quic_set_keepalive_interval`](/documentation/Network/nw_quic_set_keepalive_interval(_:_:)) Sets the keepalive interval for the QUIC connection, in seconds. [`nw_quic_set_local_max_streams_bidirectional`](/documentation/Network/nw_quic_set_local_max_streams_bidirectional(_:_:)) Sets the maximum number of bidirectional streams that the peer can create on a QUIC connection. [`nw_quic_set_local_max_streams_unidirectional`](/documentation/Network/nw_quic_set_local_max_streams_unidirectional(_:_:)) Sets the maximum number of unidirectional streams that the peer can create on a QUIC connection. [`nw_quic_set_max_datagram_frame_size`](/documentation/Network/nw_quic_set_max_datagram_frame_size(_:_:)) Sets a QUIC connection’s maximum DATAGRAM frame size. [`nw_quic_set_max_udp_payload_size`](/documentation/Network/nw_quic_set_max_udp_payload_size(_:_:)) Sets the maximum length of a QUIC packet that can be received on a connection, in bytes. [`nw_quic_set_stream_application_error`](/documentation/Network/nw_quic_set_stream_application_error(_:_:)) Sets the QUIC application error code to send for the stream. [`nw_quic_set_stream_is_datagram`](/documentation/Network/nw_quic_set_stream_is_datagram(_:_:)) Configures a QUIC stream as a datagram flow, instead of a byte stream. [`nw_quic_set_stream_is_unidirectional`](/documentation/Network/nw_quic_set_stream_is_unidirectional(_:_:)) Configures a QUIC stream as unidirectional, instead of bidirectional. [`nw_resolution_report_copy_preferred_endpoint`](/documentation/Network/nw_resolution_report_copy_preferred_endpoint(_:)) Accesses the resolved endpoint that the connection used for its first connection attempt. [`nw_resolution_report_copy_successful_endpoint`](/documentation/Network/nw_resolution_report_copy_successful_endpoint(_:)) Accesses the resolved endpoint that led to the established connection. [`nw_resolution_report_get_endpoint_count`](/documentation/Network/nw_resolution_report_get_endpoint_count(_:)) Accesses the number of endpoints resolved in this step. [`nw_resolution_report_get_milliseconds`](/documentation/Network/nw_resolution_report_get_milliseconds(_:)) Accesses the duration of this resolution step, from when the query was issued to when the response was complete. [`nw_resolution_report_get_protocol`](/documentation/Network/nw_resolution_report_get_protocol(_:)) Accesses the transport protocol your connection used for DNS resolution. [`nw_resolution_report_get_source`](/documentation/Network/nw_resolution_report_get_source(_:)) Accesses the source of the DNS response. [`nw_tcp_create_options`](/documentation/Network/nw_tcp_create_options()) Initializes a default set of TCP connection options. [`nw_tcp_get_available_receive_buffer`](/documentation/Network/nw_tcp_get_available_receive_buffer(_:)) Accesses the number of available bytes in the TCP receive buffer. [`nw_tcp_get_available_send_buffer`](/documentation/Network/nw_tcp_get_available_send_buffer(_:)) Accesses the number of available bytes in the TCP send buffer. [`nw_tcp_options_set_connection_timeout`](/documentation/Network/nw_tcp_options_set_connection_timeout(_:_:)) Sets the number of seconds that TCP waits before timing out its handshake. [`nw_tcp_options_set_disable_ack_stretching`](/documentation/Network/nw_tcp_options_set_disable_ack_stretching(_:_:)) Disables TCP acknowledgment stretching. [`nw_tcp_options_set_disable_ecn`](/documentation/Network/nw_tcp_options_set_disable_ecn(_:_:)) Disables negotiation of Explicit Congestion Notification markings. [`nw_tcp_options_set_enable_fast_open`](/documentation/Network/nw_tcp_options_set_enable_fast_open(_:_:)) Enables TCP Fast Open on a connection. [`nw_tcp_options_set_enable_keepalive`](/documentation/Network/nw_tcp_options_set_enable_keepalive(_:_:)) Enables TCP keepalives. [`nw_tcp_options_set_keepalive_count`](/documentation/Network/nw_tcp_options_set_keepalive_count(_:_:)) Sets the number of keepalive probes that TCP sends before terminating the connection. [`nw_tcp_options_set_keepalive_idle_time`](/documentation/Network/nw_tcp_options_set_keepalive_idle_time(_:_:)) Sets the number of seconds of idleness that TCP waits before sending keepalive probes. [`nw_tcp_options_set_keepalive_interval`](/documentation/Network/nw_tcp_options_set_keepalive_interval(_:_:)) Sets the number of seconds that TCP waits between sending keepalive probes. [`nw_tcp_options_set_maximum_segment_size`](/documentation/Network/nw_tcp_options_set_maximum_segment_size(_:_:)) Sets TCP’s maximum segment size in bytes. [`nw_tcp_options_set_multipath_force_version`](/documentation/Network/nw_tcp_options_set_multipath_force_version(_:_:)) [`nw_tcp_options_set_no_delay`](/documentation/Network/nw_tcp_options_set_no_delay(_:_:)) Disables Nagle’s algorithm for TCP. [`nw_tcp_options_set_no_options`](/documentation/Network/nw_tcp_options_set_no_options(_:_:)) Sets TCP into no-options mode. [`nw_tcp_options_set_no_push`](/documentation/Network/nw_tcp_options_set_no_push(_:_:)) Sets TCP into no-push mode. [`nw_tcp_options_set_persist_timeout`](/documentation/Network/nw_tcp_options_set_persist_timeout(_:_:)) Sets the TCP persist timeout in seconds, as defined by RFC 6429. [`nw_tcp_options_set_retransmit_connection_drop_time`](/documentation/Network/nw_tcp_options_set_retransmit_connection_drop_time(_:_:)) Sets the number of seconds that TCP waits between retransmission attempts. [`nw_tcp_options_set_retransmit_fin_drop`](/documentation/Network/nw_tcp_options_set_retransmit_fin_drop(_:_:)) Causes TCP to drop its connection after not receiving an ACK after a FIN. [`nw_tls_copy_sec_protocol_metadata`](/documentation/Network/nw_tls_copy_sec_protocol_metadata(_:)) Accesses the result of the TLS handshake. [`nw_tls_copy_sec_protocol_options`](/documentation/Network/nw_tls_copy_sec_protocol_options(_:)) Accesses the handshake security options TLS will use. [`nw_tls_create_options`](/documentation/Network/nw_tls_create_options()) Initializes a default set of TLS connection options. [`nw_txt_record_access_bytes`](/documentation/Network/nw_txt_record_access_bytes(_:_:)) Accesses the raw bytes contained within a TXT record. [`nw_txt_record_access_key`](/documentation/Network/nw_txt_record_access_key(_:_:_:)) Accesses the value for a specific key in a TXT record dictionary. [`nw_txt_record_apply`](/documentation/Network/nw_txt_record_apply(_:_:)) Iterates through all keys in a TXT record dictionary. [`nw_txt_record_copy`](/documentation/Network/nw_txt_record_copy(_:)) Performs a deep copy of a TXT record. [`nw_txt_record_create_dictionary`](/documentation/Network/nw_txt_record_create_dictionary()) Initializes a TXT record as a dictionary of strings. [`nw_txt_record_create_with_bytes`](/documentation/Network/nw_txt_record_create_with_bytes(_:_:)) Initializes a TXT record with raw bytes. [`nw_txt_record_find_key`](/documentation/Network/nw_txt_record_find_key(_:_:)) Checks the status of value associated with a key in a TXT record dictionary. [`nw_txt_record_get_key_count`](/documentation/Network/nw_txt_record_get_key_count(_:)) Accesses the number of keys stored in the TXT record dictionary. [`nw_txt_record_is_dictionary`](/documentation/Network/nw_txt_record_is_dictionary(_:)) Checks whether a TXT record conforms to a dictionary format. [`nw_txt_record_is_equal`](/documentation/Network/nw_txt_record_is_equal(_:_:)) Checks whether two TXT records are equivalent. [`nw_txt_record_remove_key`](/documentation/Network/nw_txt_record_remove_key(_:_:)) Removes a data value in a TXT record dictionary. [`nw_txt_record_set_key`](/documentation/Network/nw_txt_record_set_key(_:_:_:_:)) Sets a data value in a TXT record dictionary. [`nw_udp_create_metadata`](/documentation/Network/nw_udp_create_metadata()) Initializes a default UDP message. [`nw_udp_create_options`](/documentation/Network/nw_udp_create_options()) Initializes a default set of UDP connection options. [`nw_udp_options_set_prefer_no_checksum`](/documentation/Network/nw_udp_options_set_prefer_no_checksum(_:_:)) Configures the connection to not send UDP checksums. [`nw_ws_create_metadata`](/documentation/Network/nw_ws_create_metadata(_:)) Initializes a WebSocket message with a specific type code. [`nw_ws_create_options`](/documentation/Network/nw_ws_create_options(_:)) Initializes a default set of WebSocket connection options. [`nw_ws_metadata_copy_server_response`](/documentation/Network/nw_ws_metadata_copy_server_response(_:)) Accesses the WebSocket server’s response sent during the handshake. [`nw_ws_metadata_get_close_code`](/documentation/Network/nw_ws_metadata_get_close_code(_:)) Accesses the close code on a WebSocket message. [`nw_ws_metadata_get_opcode`](/documentation/Network/nw_ws_metadata_get_opcode(_:)) Checks the type code on a WebSocket message. [`nw_ws_metadata_set_close_code`](/documentation/Network/nw_ws_metadata_set_close_code(_:_:)) Sets a close code on a WebSocket message. [`nw_ws_metadata_set_pong_handler`](/documentation/Network/nw_ws_metadata_set_pong_handler(_:_:_:)) Sets a handler on a Ping message to be invoked when the corresponding Pong message is received. [`nw_ws_options_add_additional_header`](/documentation/Network/nw_ws_options_add_additional_header(_:_:_:)) Adds additional HTTP header fields to be sent by the client during the WebSocket handshake. [`nw_ws_options_add_subprotocol`](/documentation/Network/nw_ws_options_add_subprotocol(_:_:)) Adds to the list of supported application protocols that will be presented to a WebSocket server during connection establishment. [`nw_ws_options_set_auto_reply_ping`](/documentation/Network/nw_ws_options_set_auto_reply_ping(_:_:)) Configures the connection to automatically reply to Ping messages instead of delivering them to you. [`nw_ws_options_set_client_request_handler`](/documentation/Network/nw_ws_options_set_client_request_handler(_:_:_:)) Sets a handler to react to as a server to inbound WebSocket client handshakes. [`nw_ws_options_set_maximum_message_size`](/documentation/Network/nw_ws_options_set_maximum_message_size(_:_:)) Sets the maximum allowed message size, in bytes, to be received by the WebSocket connection. [`nw_ws_options_set_skip_handshake`](/documentation/Network/nw_ws_options_set_skip_handshake(_:_:)) Specifies whether the WebSocket protocol skips its handshake and begins framing data once the underlying connection is established. [`nw_ws_request_enumerate_additional_headers`](/documentation/Network/nw_ws_request_enumerate_additional_headers(_:_:)) Enumerates additional HTTP headers in a WebSocket message. [`nw_ws_request_enumerate_subprotocols`](/documentation/Network/nw_ws_request_enumerate_subprotocols(_:_:)) Enumerates the supported subprotocols in a WebSocket message. [`nw_ws_response_add_additional_header`](/documentation/Network/nw_ws_response_add_additional_header(_:_:_:)) Adds an additional HTTP header to a WebSocket server response. [`nw_ws_response_create`](/documentation/Network/nw_ws_response_create(_:_:)) Initializes a WebSocket server response with a status and selected subprotocol. [`nw_ws_response_enumerate_additional_headers`](/documentation/Network/nw_ws_response_enumerate_additional_headers(_:_:)) Enumerates the additional HTTP headers in a WebSocket server response. [`nw_ws_response_get_selected_subprotocol`](/documentation/Network/nw_ws_response_get_selected_subprotocol(_:)) Accesses the selected subprotocol in a WebSocket server response. [`nw_ws_response_get_status`](/documentation/Network/nw_ws_response_get_status(_:)) Accesses the status of a WebSocket server response. ### Functions [`nw_advertise_descriptor_create_application_service`](/documentation/Network/nw_advertise_descriptor_create_application_service(_:)) [`nw_advertise_descriptor_get_application_service_name`](/documentation/Network/nw_advertise_descriptor_get_application_service_name(_:)) [`nw_browse_descriptor_create_application_service`](/documentation/Network/nw_browse_descriptor_create_application_service(_:)) [`nw_browse_descriptor_get_application_service_name`](/documentation/Network/nw_browse_descriptor_get_application_service_name(_:)) [`nw_connection_group_copy_protocol_metadata`](/documentation/Network/nw_connection_group_copy_protocol_metadata(_:_:)) [`nw_connection_group_copy_protocol_metadata_for_message`](/documentation/Network/nw_connection_group_copy_protocol_metadata_for_message(_:_:_:)) [`nw_connection_group_extract_connection`](/documentation/Network/nw_connection_group_extract_connection(_:_:_:)) [`nw_connection_group_reinsert_extracted_connection`](/documentation/Network/nw_connection_group_reinsert_extracted_connection(_:_:)) [`nw_connection_group_set_new_connection_handler`](/documentation/Network/nw_connection_group_set_new_connection_handler(_:_:)) [`nw_data_transfer_report_get_path_radio_type`](/documentation/Network/nw_data_transfer_report_get_path_radio_type(_:_:)) [`nw_endpoint_copy_txt_record`](/documentation/Network/nw_endpoint_copy_txt_record(_:)) [`nw_endpoint_get_signature`](/documentation/Network/nw_endpoint_get_signature(_:_:)) [`nw_ethernet_channel_create_with_parameters`](/documentation/Network/nw_ethernet_channel_create_with_parameters(_:_:_:)) [`nw_ethernet_channel_get_maximum_payload_size`](/documentation/Network/nw_ethernet_channel_get_maximum_payload_size(_:)) [`nw_framer_copy_options`](/documentation/Network/nw_framer_copy_options(_:)) [`nw_framer_options_copy_object_value`](/documentation/Network/nw_framer_options_copy_object_value(_:_:)) [`nw_framer_options_set_object_value`](/documentation/Network/nw_framer_options_set_object_value(_:_:_:)) [`nw_group_descriptor_create_multiplex`](/documentation/Network/nw_group_descriptor_create_multiplex(_:)) [`nw_ip_options_set_disable_multicast_loopback`](/documentation/Network/nw_ip_options_set_disable_multicast_loopback(_:_:)) [`nw_listener_create_with_launchd_key`](/documentation/Network/nw_listener_create_with_launchd_key(_:_:)) [`nw_listener_set_new_connection_group_handler`](/documentation/Network/nw_listener_set_new_connection_group_handler(_:_:)) [`nw_parameters_create_application_service`](/documentation/Network/nw_parameters_create_application_service()) [`nw_path_get_unsatisfied_reason`](/documentation/Network/nw_path_get_unsatisfied_reason(_:)) [`nw_path_monitor_create_for_ethernet_channel`](/documentation/Network/nw_path_monitor_create_for_ethernet_channel()) [`nw_proxy_config_add_excluded_domain`](/documentation/Network/nw_proxy_config_add_excluded_domain(_:_:)) [`nw_proxy_config_add_match_domain`](/documentation/Network/nw_proxy_config_add_match_domain(_:_:)) [`nw_proxy_config_clear_excluded_domains`](/documentation/Network/nw_proxy_config_clear_excluded_domains(_:)) [`nw_proxy_config_clear_match_domains`](/documentation/Network/nw_proxy_config_clear_match_domains(_:)) [`nw_proxy_config_enumerate_excluded_domains`](/documentation/Network/nw_proxy_config_enumerate_excluded_domains(_:_:)) [`nw_proxy_config_enumerate_match_domains`](/documentation/Network/nw_proxy_config_enumerate_match_domains(_:_:)) [`nw_tcp_options_set_multipath_force_version`](/documentation/Network/nw_tcp_options_set_multipath_force_version(_:_:)) --- Copyright © 2026 Apple Inc. 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