ICMP6 Application Interface for Nordic's IPv6 stack

Offset of echo request payload from ICMPv6 header.

ICMPv6 data RX callback.

Asynchronous callback used to notify the application of ICMP packets received. By default, the application is not notified through ICMP of messages related to ECHO requests or any errors. However, these notifications can easily be enabled by defining either the ICMP6_ENABLE_ND6_MESSAGES_TO_APPLICATION or the ICMP6_ENABLE_ALL_MESSAGES_TO_APPLICATION if the application should handle them.

Parameters

[in]	p_interface	Pointer to the IPv6 interface from where the ICMP packet was received.
[in]	p_ip_header	Pointer to the IP header of the ICMP packet received.
[in]	p_icmp_header	Pointer to the ICMP header of the received packet.
[in]	process_result	Notifies the application if the ICMP packet was processed successfully or if an error occurred, for example, if the packet was malformed.
[in]	p_rx_packet	Packet buffer containing the packet received. p_rx_packet->p_payload contains the ICMP payload.

Return values

A	provision for the application to notify the module of whether the received packet was processed successfully by application. The application may take ownership of the received packet by returning IOT_IPV6_ERR_PENDING, in which case the application must take care to free it using iot_pbuffer_free .

Sends ICMPv6 echo request as defined in RFC4443.

API used to send an ICMPv6 echo request packet to a specific destination address. The user can decide how much additional data must be sent.

The application calling the function should allocate a packet before, with the type set to ICMP6_PACKET_TYPE in the allocation parameter.

The application should pack the payload at ICMP6_ECHO_REQUEST_PAYLOAD_OFFSET. ID, Sequence number, ICMP Code, type checksum, etc. are filled in by the module.

The application shall not free the allocated packet buffer if the procedure was successful, to ensure that no data copies are needed when transmitting a packet.

Parameters

[in]	p_interface	Pointer to the IPv6 interface to send the ICMP packet.
[in]	p_src_addr	IPv6 source address from where the echo request is sent.
[in]	p_dest_addr	IPv6 destination address to where the echo request is sent.
[in]	p_request	Packet buffer containing the echo request.

Return values

NRF_SUCCESS

If the send request was successful.

Sends ICMPv6 Error Message as defined in RFC 4443.

API to send messages categorized under error messages. See ICMPv6 error messages. and RFC 4443 for valid types.

Parameters

[in]	p_interface	Identifies the interface on which the procedure was requested. Shall not be NULL.
[in]	p_src_addr	Source IPv6 address to be used for the request. Shall not be NULL.
[in]	p_dest_addr	Destination IPv6 address to which the message send is requested. Shall not be NULL.
[in]	p_param	Parameters describing Type, code, invoking packet information any additional details associated with the error message.

Return values

NRF_SUCCESS

If the send request was successful, else, an error code indicating reason for failure.

Sends neighbour solicitation message defined in RFC6775.

API used to send a neighbor discovery message of type Neighbor Solicitation to a specific destination address.

The function internally tries to allocate a packet buffer. EUI-64 used in the SLLAO and ARO options is taken from the interface parameter defined in the ipv6_init() function.

Parameters

[in]	p_interface	Pointer to the IPv6 interface to send the ICMP packet.
[in]	p_src_addr	IPv6 source address from where the neighbor solicitation message is sent.
[in]	p_dest_addr	IPv6 destination address to where the neighbor solicitation message is sent.
[in]	p_ns_param	Neighbor discovery parameters.

Return values

NRF_SUCCESS

If the send request was successful.

Registers the callback function for echo reply.

API used to register callback to indicate the ICMP echo reply packet. Could be not used.

Neighbor discovery related messages are not relayed to the application by default. However, this can be enabled by using the ICMP6_ENABLE_ND6_MESSAGES_TO_APPLICATION configuration parameter.

Parameters

[in]

cb

Handler called when an ICMP packet is received.

Return values

NRF_SUCCESS

If the registration was successful.

Sends router solicitation message defined in RFC6775.

API used to send a neighbor discovery message of type Router Solicitation to a specific destination address. If no address is known, the user should send the message to all routers' address (FF02::1).

The function internally tries to allocate a packet buffer. EUI-64 used in the SLLAO option is taken from the interface parameter defined in the ipv6_init() function.

Parameters

[in]	p_interface	Pointer to the IPv6 interface to send the ICMP packet.
[in]	p_src_addr	IPv6 source address from where the router solicitation message is sent.
[in]	p_dest_addr	IPv6 destination address to where the router solicitation message is sent.

Return values

NRF_SUCCESS

If the send request was successful.