This module includes functions that control IPv6 communication.

Classes
struct	otIp6InterfaceIdentifier
	This structure represents the Interface Identifier of an IPv6 address.

struct	otIp6NetworkPrefix
	This structure represents the Network Prefix of an IPv6 address (most significant 64 bits of the address).

struct	otIp6AddressComponents
	This structure represents the components of an IPv6 address.

struct	otIp6Address
	This structure represents an IPv6 address.

struct	otIp6Prefix
	This structure represents an IPv6 prefix.

struct	otNetifAddress
	This structure represents an IPv6 network interface unicast address.

struct	otNetifMulticastAddress
	This structure represents an IPv6 network interface multicast address.

struct	otSockAddr
	This structure represents an IPv6 socket address.

struct	otMessageInfo
	This structure represents the local and peer IPv6 socket addresses.

struct	otIp6AddressInfo
	This structure represents IPv6 address information.

Macros
#define	OT_IP6_PREFIX_SIZE 8
	Size of an IPv6 prefix (bytes)

#define	OT_IP6_PREFIX_BITSIZE ( OT_IP6_PREFIX_SIZE * 8)
	Size of an IPv6 prefix (bits)

#define	OT_IP6_IID_SIZE 8
	Size of an IPv6 Interface Identifier (bytes)

#define	OT_IP6_ADDRESS_SIZE 16
	Size of an IPv6 address (bytes)

#define	OT_IP6_ADDRESS_STRING_SIZE 40
	Recommended size for string representation of an IPv6 address.

#define	OT_IP6_SOCK_ADDR_STRING_SIZE 48
	Recommended size for string representation of an IPv6 socket address.

#define	OT_IP6_PREFIX_STRING_SIZE 45
	Recommended size for string representation of an IPv6 prefix.

Typedefs
typedef struct otIp6InterfaceIdentifier	otIp6InterfaceIdentifier
	This structure represents the Interface Identifier of an IPv6 address.

typedef struct otIp6NetworkPrefix	otIp6NetworkPrefix
	This structure represents the Network Prefix of an IPv6 address (most significant 64 bits of the address).

typedef struct otIp6AddressComponents	otIp6AddressComponents
	This structure represents the components of an IPv6 address.

typedef struct otIp6Address	otIp6Address
	This structure represents an IPv6 address.

typedef struct otIp6Prefix	otIp6Prefix
	This structure represents an IPv6 prefix.

typedef struct otNetifAddress	otNetifAddress
	This structure represents an IPv6 network interface unicast address.

typedef struct otNetifMulticastAddress	otNetifMulticastAddress
	This structure represents an IPv6 network interface multicast address.

typedef struct otSockAddr	otSockAddr
	This structure represents an IPv6 socket address.

typedef struct otMessageInfo	otMessageInfo
	This structure represents the local and peer IPv6 socket addresses.

typedef void(*	otIp6ReceiveCallback ) ( otMessage aMessage, void aContext)
	This function pointer is called when an IPv6 datagram is received.

typedef struct otIp6AddressInfo	otIp6AddressInfo

typedef void(*	otIp6AddressCallback ) (const otIp6AddressInfo aAddressInfo, bool aIsAdded, void aContext)
	This function pointer is called when an internal IPv6 address is added or removed.

typedef bool(*	otIp6SlaacPrefixFilter ) ( otInstance aInstance, const otIp6Prefix aPrefix)
	This function pointer allows user to filter prefixes and not allow an SLAAC address based on a prefix to be added.

typedef void(*	otIp6RegisterMulticastListenersCallback ) (void aContext, otError aError, uint8_t aMlrStatus, const otIp6Address aFailedAddresses, uint8_t aFailedAddressNum)
	This function pointer is called with results of `otIp6RegisterMulticastListeners` .

Enumerations
enum	{ OT_ADDRESS_ORIGIN_THREAD = 0, OT_ADDRESS_ORIGIN_SLAAC = 1, OT_ADDRESS_ORIGIN_DHCPV6 = 2, OT_ADDRESS_ORIGIN_MANUAL = 3 }
	IPv6 Address origins.

enum	{ OT_ECN_NOT_CAPABLE = 0x0, OT_ECN_CAPABLE_0 = 0x2, OT_ECN_CAPABLE_1 = 0x1, OT_ECN_MARKED = 0x3 }
	ECN statuses, represented as in the IP header.

enum	{ OT_IP6_PROTO_HOP_OPTS = 0, OT_IP6_PROTO_TCP = 6, OT_IP6_PROTO_UDP = 17, OT_IP6_PROTO_IP6 = 41, OT_IP6_PROTO_ROUTING = 43, OT_IP6_PROTO_FRAGMENT = 44, OT_IP6_PROTO_ICMP6 = 58, OT_IP6_PROTO_NONE = 59, OT_IP6_PROTO_DST_OPTS = 60 }
	Internet Protocol Numbers.

Functions
otError	otIp6SetEnabled ( otInstance *aInstance, bool aEnabled)
	This function brings up/down the IPv6 interface.

bool	otIp6IsEnabled ( otInstance *aInstance)
	This function indicates whether or not the IPv6 interface is up.

otError	otIp6AddUnicastAddress ( otInstance aInstance, const otNetifAddress aAddress)
	Add a Network Interface Address to the Thread interface.

otError	otIp6RemoveUnicastAddress ( otInstance aInstance, const otIp6Address aAddress)
	Remove a Network Interface Address from the Thread interface.

const otNetifAddress *	otIp6GetUnicastAddresses ( otInstance *aInstance)
	Get the list of IPv6 addresses assigned to the Thread interface.

otError	otIp6SubscribeMulticastAddress ( otInstance aInstance, const otIp6Address aAddress)
	Subscribe the Thread interface to a Network Interface Multicast Address.

otError	otIp6UnsubscribeMulticastAddress ( otInstance aInstance, const otIp6Address aAddress)
	Unsubscribe the Thread interface to a Network Interface Multicast Address.

const otNetifMulticastAddress *	otIp6GetMulticastAddresses ( otInstance *aInstance)
	Get the list of IPv6 multicast addresses subscribed to the Thread interface.

bool	otIp6IsMulticastPromiscuousEnabled ( otInstance *aInstance)
	Check if multicast promiscuous mode is enabled on the Thread interface.

void	otIp6SetMulticastPromiscuousEnabled ( otInstance *aInstance, bool aEnabled)
	Enable multicast promiscuous mode on the Thread interface.

otMessage *	otIp6NewMessage ( otInstance aInstance, const otMessageSettings aSettings)
	Allocate a new message buffer for sending an IPv6 message.

otMessage *	otIp6NewMessageFromBuffer ( otInstance aInstance, const uint8_t aData, uint16_t aDataLength, const otMessageSettings *aSettings)
	Allocate a new message buffer and write the IPv6 datagram to the message buffer for sending an IPv6 message.

void	otIp6SetReceiveCallback ( otInstance aInstance, otIp6ReceiveCallback aCallback, void aCallbackContext)
	This function registers a callback to provide received IPv6 datagrams.

void	otIp6SetAddressCallback ( otInstance aInstance, otIp6AddressCallback aCallback, void aCallbackContext)
	This function registers a callback to notify internal IPv6 address changes.

bool	otIp6IsReceiveFilterEnabled ( otInstance *aInstance)
	This function indicates whether or not Thread control traffic is filtered out when delivering IPv6 datagrams via the callback specified in otIp6SetReceiveCallback() .

void	otIp6SetReceiveFilterEnabled ( otInstance *aInstance, bool aEnabled)
	This function sets whether or not Thread control traffic is filtered out when delivering IPv6 datagrams via the callback specified in otIp6SetReceiveCallback() .

otError	otIp6Send ( otInstance aInstance, otMessage aMessage)
	This function sends an IPv6 datagram via the Thread interface.

otError	otIp6AddUnsecurePort ( otInstance *aInstance, uint16_t aPort)
	This function adds a port to the allowed unsecured port list.

otError	otIp6RemoveUnsecurePort ( otInstance *aInstance, uint16_t aPort)
	This function removes a port from the allowed unsecure port list.

void	otIp6RemoveAllUnsecurePorts ( otInstance *aInstance)
	This function removes all ports from the allowed unsecure port list.

const uint16_t *	otIp6GetUnsecurePorts ( otInstance aInstance, uint8_t aNumEntries)
	This function returns a pointer to the unsecure port list.

bool	otIp6IsAddressEqual (const otIp6Address aFirst, const otIp6Address aSecond)
	Test if two IPv6 addresses are the same.

bool	otIp6ArePrefixesEqual (const otIp6Prefix aFirst, const otIp6Prefix aSecond)
	Test if two IPv6 prefixes are the same.

otError	otIp6AddressFromString (const char aString, otIp6Address aAddress)
	This function converts a human-readable IPv6 address string into a binary representation.

void	otIp6AddressToString (const otIp6Address aAddress, char aBuffer, uint16_t aSize)
	This function converts a given IPv6 address to a human-readable string.

void	otIp6SockAddrToString (const otSockAddr aSockAddr, char aBuffer, uint16_t aSize)
	This function converts a given IPv6 socket address to a human-readable string.

void	otIp6PrefixToString (const otIp6Prefix aPrefix, char aBuffer, uint16_t aSize)
	This function converts a given IPv6 prefix to a human-readable string.

uint8_t	otIp6PrefixMatch (const otIp6Address aFirst, const otIp6Address aSecond)
	This function returns the prefix match length (bits) for two IPv6 addresses.

bool	otIp6IsAddressUnspecified (const otIp6Address *aAddress)
	This function indicates whether or not a given IPv6 address is the Unspecified Address.

otError	otIp6SelectSourceAddress ( otInstance aInstance, otMessageInfo aMessageInfo)
	This function perform OpenThread source address selection.

bool	otIp6IsSlaacEnabled ( otInstance *aInstance)
	This function indicates whether the SLAAC module is enabled or not.

void	otIp6SetSlaacEnabled ( otInstance *aInstance, bool aEnabled)
	This function enables/disables the SLAAC module.

void	otIp6SetSlaacPrefixFilter ( otInstance *aInstance, otIp6SlaacPrefixFilter aFilter)
	This function sets the SLAAC module filter handler.

otError	otIp6RegisterMulticastListeners ( otInstance aInstance, const otIp6Address aAddresses, uint8_t aAddressNum, const uint32_t aTimeout, otIp6RegisterMulticastListenersCallback aCallback, void aContext)
	This function registers Multicast Listeners to Primary Backbone Router.

otError	otIp6SetMeshLocalIid ( otInstance aInstance, const otIp6InterfaceIdentifier aIid)
	This function sets the Mesh Local IID (for test purpose).

const char *	otIp6ProtoToString (uint8_t aIpProto)
	This function converts a given IP protocol number to a human-readable string.

Variables
OT_TOOL_PACKED_BEGIN struct otIp6InterfaceIdentifier	OT_TOOL_PACKED_END

Detailed Description

This module includes functions that control IPv6 communication.

Typedef Documentation

◆ otIp6AddressCallback

typedef void(* otIp6AddressCallback) (const otIp6AddressInfo *aAddressInfo, bool aIsAdded, void *aContext)

This function pointer is called when an internal IPv6 address is added or removed.

Parameters

[in]	`aAddressInfo`	A pointer to the IPv6 address information.
[in]	`aIsAdded`	TRUE if the `aAddress` was added, FALSE if `aAddress` was removed.
[in]	`aContext`	A pointer to application-specific context.

◆ otIp6ReceiveCallback

typedef void(* otIp6ReceiveCallback) ( otMessage *aMessage, void *aContext)

This function pointer is called when an IPv6 datagram is received.

Parameters

[in]	`aMessage`	A pointer to the message buffer containing the received IPv6 datagram. This function transfers the ownership of the `aMessage` to the receiver of the callback. The message should be freed by the receiver of the callback after it is processed (see otMessageFree() ).
[in]	`aContext`	A pointer to application-specific context.

◆ otIp6RegisterMulticastListenersCallback

typedef void(* otIp6RegisterMulticastListenersCallback) (void *aContext, otError aError, uint8_t aMlrStatus, const otIp6Address *aFailedAddresses, uint8_t aFailedAddressNum)

This function pointer is called with results of otIp6RegisterMulticastListeners .

Parameters

[in]	`aContext`	A pointer to the user context.
[in]	`aError`	OT_ERROR_NONE when successfully sent MLR.req and received MLR.rsp, OT_ERROR_RESPONSE_TIMEOUT when failed to receive MLR.rsp, OT_ERROR_PARSE when failed to parse MLR.rsp.
[in]	`aMlrStatus`	The Multicast Listener Registration status when `aError` is OT_ERROR_NONE.
[in]	`aFailedAddresses`	A pointer to the failed IPv6 addresses when `aError` is OT_ERROR_NONE.
[in]	`aFailedAddressNum`	The number of failed IPv6 addresses when `aError` is OT_ERROR_NONE.

See also: otIp6RegisterMulticastListeners

◆ otIp6SlaacPrefixFilter

typedef bool(* otIp6SlaacPrefixFilter) ( otInstance *aInstance, const otIp6Prefix *aPrefix)

This function pointer allows user to filter prefixes and not allow an SLAAC address based on a prefix to be added.

otIp6SetSlaacPrefixFilter() can be used to set the filter handler. The filter handler is invoked by SLAAC module when it is about to add a SLAAC address based on a prefix. Its boolean return value determines whether the address is filtered (not added) or not.

Parameters

[in]	`aInstacne`	A pointer to an OpenThread instance.
[in]	`aPrefix`	A pointer to prefix for which SLAAC address is about to be added.

Return values

`TRUE`	Indicates that the SLAAC address based on the prefix should be filtered and NOT added.
`FALSE`	Indicates that the SLAAC address based on the prefix should be added.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

IPv6 Address origins.

Enumerator
OT_ADDRESS_ORIGIN_THREAD	Thread assigned address (ALOC, RLOC, MLEID, etc)
OT_ADDRESS_ORIGIN_SLAAC	SLAAC assigned address.
OT_ADDRESS_ORIGIN_DHCPV6	DHCPv6 assigned address.
OT_ADDRESS_ORIGIN_MANUAL	Manually assigned address.

◆ anonymous enum

anonymous enum

ECN statuses, represented as in the IP header.

Enumerator
OT_ECN_NOT_CAPABLE	Non-ECT.
OT_ECN_CAPABLE_0	ECT(0)
OT_ECN_CAPABLE_1	ECT(1)
OT_ECN_MARKED	Congestion encountered (CE)

◆ anonymous enum

anonymous enum

Internet Protocol Numbers.

Enumerator
OT_IP6_PROTO_HOP_OPTS	IPv6 Hop-by-Hop Option.
OT_IP6_PROTO_TCP	Transmission Control Protocol.
OT_IP6_PROTO_UDP	User Datagram.
OT_IP6_PROTO_IP6	IPv6 encapsulation.
OT_IP6_PROTO_ROUTING	Routing Header for IPv6.
OT_IP6_PROTO_FRAGMENT	Fragment Header for IPv6.
OT_IP6_PROTO_ICMP6	ICMP for IPv6.
OT_IP6_PROTO_NONE	No Next Header for IPv6.
OT_IP6_PROTO_DST_OPTS	Destination Options for IPv6.

Function Documentation

◆ otIp6AddressFromString()

otError otIp6AddressFromString	(	const char *	`aString,`
		otIp6Address *	`aAddress`
	)

This function converts a human-readable IPv6 address string into a binary representation.

Parameters

[in]	`aString`	A pointer to a NULL-terminated string.
[out]	`aAddress`	A pointer to an IPv6 address.

Return values

`OT_ERROR_NONE`	Successfully parsed the string.
`OT_ERROR_INVALID_ARGS`	Failed to parse the string.

◆ otIp6AddressToString()

void otIp6AddressToString	(	const otIp6Address *	`aAddress,`
		char *	`aBuffer,`
		uint16_t	`aSize`
	)

This function converts a given IPv6 address to a human-readable string.

The IPv6 address string is formatted as 16 hex values separated by ':' (i.e., "%x:%x:%x:...:%x").

If the resulting string does not fit in aBuffer (within its aSize characters), the string will be truncated but the outputted string is always null-terminated.

Parameters

[in]	`aAddress`	A pointer to an IPv6 address (MUST NOT be NULL).
[out]	`aBuffer`	A pointer to a char array to output the string (MUST NOT be NULL).
[in]	`aSize`	The size of `aBuffer` (in bytes). Recommended to use `OT_IP6_ADDRESS_STRING_SIZE` .

◆ otIp6AddUnicastAddress()

otError otIp6AddUnicastAddress	(	otInstance *	`aInstance,`
		const otNetifAddress *	`aAddress`
	)

Add a Network Interface Address to the Thread interface.

The passed-in instance aAddress is copied by the Thread interface. The Thread interface only supports a fixed number of externally added unicast addresses. See OPENTHREAD_CONFIG_IP6_MAX_EXT_UCAST_ADDRS.

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in]	`aAddress`	A pointer to a Network Interface Address.

Return values

`OT_ERROR_NONE`	Successfully added (or updated) the Network Interface Address.
`OT_ERROR_INVALID_ARGS`	The IP Address indicated by `aAddress` is an internal address.
`OT_ERROR_NO_BUFS`	The Network Interface is already storing the maximum allowed external addresses.

◆ otIp6AddUnsecurePort()

otError otIp6AddUnsecurePort	(	otInstance *	`aInstance,`
		uint16_t	`aPort`
	)

This function adds a port to the allowed unsecured port list.

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in]	`aPort`	The port value.

Return values

`OT_ERROR_NONE`	The port was successfully added to the allowed unsecure port list.
`OT_ERROR_INVALID_ARGS`	The port is invalid (value 0 is reserved for internal use).
`OT_ERROR_NO_BUFS`	The unsecure port list is full.

◆ otIp6ArePrefixesEqual()

bool otIp6ArePrefixesEqual	(	const otIp6Prefix *	`aFirst,`
		const otIp6Prefix *	`aSecond`
	)

Test if two IPv6 prefixes are the same.

Parameters

[in]	`aFirst`	A pointer to the first IPv6 prefix to compare.
[in]	`aSecond`	A pointer to the second IPv6 prefix to compare.

Return values

`TRUE`	The two IPv6 prefixes are the same.
`FALSE`	The two IPv6 prefixes are not the same.

◆ otIp6GetMulticastAddresses()

const otNetifMulticastAddress * otIp6GetMulticastAddresses ( otInstance * aInstance )

Get the list of IPv6 multicast addresses subscribed to the Thread interface.

Parameters

[in] aInstance A pointer to an OpenThread instance.

Returns: A pointer to the first Network Interface Multicast Address.

◆ otIp6GetUnicastAddresses()

const otNetifAddress * otIp6GetUnicastAddresses ( otInstance * aInstance )

Get the list of IPv6 addresses assigned to the Thread interface.

Parameters

[in] aInstance A pointer to an OpenThread instance.

Returns: A pointer to the first Network Interface Address.

◆ otIp6GetUnsecurePorts()

const uint16_t* otIp6GetUnsecurePorts	(	otInstance *	`aInstance,`
		uint8_t *	`aNumEntries`
	)

This function returns a pointer to the unsecure port list.

Note: Port value 0 is used to indicate an invalid entry.

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[out]	`aNumEntries`	The number of entries in the list.

Returns: A pointer to the unsecure port list.

◆ otIp6IsAddressEqual()

bool otIp6IsAddressEqual	(	const otIp6Address *	`aFirst,`
		const otIp6Address *	`aSecond`
	)

Test if two IPv6 addresses are the same.

Parameters

[in]	`aFirst`	A pointer to the first IPv6 address to compare.
[in]	`aSecond`	A pointer to the second IPv6 address to compare.

Return values

`TRUE`	The two IPv6 addresses are the same.
`FALSE`	The two IPv6 addresses are not the same.

◆ otIp6IsAddressUnspecified()

bool otIp6IsAddressUnspecified ( const otIp6Address * aAddress )

This function indicates whether or not a given IPv6 address is the Unspecified Address.

Parameters

[in] aAddress A pointer to an IPv6 address.

Return values

`TRUE`	If the IPv6 address is the Unspecified Address.
`FALSE`	If the IPv6 address is not the Unspecified Address.

◆ otIp6IsEnabled()

bool otIp6IsEnabled ( otInstance * aInstance )

This function indicates whether or not the IPv6 interface is up.

Parameters

[in] aInstance A pointer to an OpenThread instance.

Return values

`TRUE`	The IPv6 interface is enabled.
`FALSE`	The IPv6 interface is disabled.

◆ otIp6IsMulticastPromiscuousEnabled()

bool otIp6IsMulticastPromiscuousEnabled ( otInstance * aInstance )

Check if multicast promiscuous mode is enabled on the Thread interface.

Parameters

[in] aInstance A pointer to an OpenThread instance.

See also: otIp6SetMulticastPromiscuousEnabled

◆ otIp6IsReceiveFilterEnabled()

bool otIp6IsReceiveFilterEnabled ( otInstance * aInstance )

This function indicates whether or not Thread control traffic is filtered out when delivering IPv6 datagrams via the callback specified in otIp6SetReceiveCallback() .

Parameters

[in] aInstance A pointer to an OpenThread instance.

Returns: TRUE if Thread control traffic is filtered out, FALSE otherwise.

See also: otIp6SetReceiveCallback; otIp6SetReceiveFilterEnabled

◆ otIp6IsSlaacEnabled()

bool otIp6IsSlaacEnabled ( otInstance * aInstance )

This function indicates whether the SLAAC module is enabled or not.

This function requires the build-time feature OPENTHREAD_CONFIG_IP6_SLAAC_ENABLE to be enabled.

Return values

`TRUE`	SLAAC module is enabled.
`FALSE`	SLAAC module is disabled.

◆ otIp6NewMessage()

otMessage * otIp6NewMessage	(	otInstance *	`aInstance,`
		const otMessageSettings *	`aSettings`
	)

Allocate a new message buffer for sending an IPv6 message.

Note: If aSettings is 'NULL', the link layer security is enabled and the message priority is set to OT_MESSAGE_PRIORITY_NORMAL by default.

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in]	`aSettings`	A pointer to the message settings or NULL to set default settings.

Returns: A pointer to the message buffer or NULL if no message buffers are available or parameters are invalid.

See also: otMessageFree

◆ otIp6NewMessageFromBuffer()

otMessage * otIp6NewMessageFromBuffer	(	otInstance *	`aInstance,`
		const uint8_t *	`aData,`
		uint16_t	`aDataLength,`
		const otMessageSettings *	`aSettings`
	)

Allocate a new message buffer and write the IPv6 datagram to the message buffer for sending an IPv6 message.

Note: If aSettings is NULL, the link layer security is enabled and the message priority is obtained from IPv6 message itself. If aSettings is not NULL, the aSetting->mPriority is ignored and obtained from IPv6 message itself.

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in]	`aData`	A pointer to the IPv6 datagram buffer.
[in]	`aDataLength`	The size of the IPv6 datagram buffer pointed by `aData` .
[in]	`aSettings`	A pointer to the message settings or NULL to set default settings.

Returns: A pointer to the message or NULL if malformed IPv6 header or insufficient message buffers are available.

See also: otMessageFree

◆ otIp6PrefixMatch()

uint8_t otIp6PrefixMatch	(	const otIp6Address *	`aFirst,`
		const otIp6Address *	`aSecond`
	)

This function returns the prefix match length (bits) for two IPv6 addresses.

Parameters

[in]	`aFirst`	A pointer to the first IPv6 address.
[in]	`aSecond`	A pointer to the second IPv6 address.

Returns: The prefix match length in bits.

◆ otIp6PrefixToString()

void otIp6PrefixToString	(	const otIp6Prefix *	`aPrefix,`
		char *	`aBuffer,`
		uint16_t	`aSize`
	)

This function converts a given IPv6 prefix to a human-readable string.

The IPv6 address string is formatted as "%x:%x:%x:...[::]/plen".

If the resulting string does not fit in aBuffer (within its aSize characters), the string will be truncated but the outputted string is always null-terminated.

Parameters

[in]	`aPrefix`	A pointer to an IPv6 prefix (MUST NOT be NULL).
[out]	`aBuffer`	A pointer to a char array to output the string (MUST NOT be NULL).
[in]	`aSize`	The size of `aBuffer` (in bytes). Recommended to use `OT_IP6_PREFIX_STRING_SIZE` .

◆ otIp6ProtoToString()

const char* otIp6ProtoToString ( uint8_t aIpProto )

This function converts a given IP protocol number to a human-readable string.

Parameters

[in] aIpProto An IP protocol number ( OT_IP6_PROTO_* enumeration).

Returns: A string representing aIpProto .

◆ otIp6RegisterMulticastListeners()

otError otIp6RegisterMulticastListeners	(	otInstance *	`aInstance,`
		const otIp6Address *	`aAddresses,`
		uint8_t	`aAddressNum,`
		const uint32_t *	`aTimeout,`
		otIp6RegisterMulticastListenersCallback	`aCallback,`
		void *	`aContext`
	)

This function registers Multicast Listeners to Primary Backbone Router.

Note: only available when both OPENTHREAD_CONFIG_TMF_PROXY_MLR_ENABLE and OPENTHREAD_CONFIG_COMMISSIONER_ENABLE are enabled)

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in]	`aAddresses`	A Multicast Address Array to register.
[in]	`aAddressNum`	The number of Multicast Address to register (0 if `aAddresses` is NULL).
[in]	`aTimeout`	A pointer to the timeout value (in seconds) to be included in MLR.req. A timeout value of 0 removes the corresponding Multicast Listener. If NULL, MLR.req would have no Timeout Tlv by default.
[in]	`aCallback`	A pointer to the callback function.
[in]	`aContext`	A pointer to the user context.

Return values

`OT_ERROR_NONE`	Successfully sent MLR.req. The `aCallback` will be called iff this method returns OT_ERROR_NONE.
`OT_ERROR_BUSY`	If a previous registration was ongoing.
`OT_ERROR_INVALID_ARGS`	If one or more arguments are invalid.
`OT_ERROR_INVALID_STATE`	If the device was not in a valid state to send MLR.req (e.g. Commissioner not started, Primary Backbone Router not found).
`OT_ERROR_NO_BUFS`	If insufficient message buffers available.

See also: otIp6RegisterMulticastListenersCallback

◆ otIp6RemoveAllUnsecurePorts()

void otIp6RemoveAllUnsecurePorts ( otInstance * aInstance )

This function removes all ports from the allowed unsecure port list.

Parameters

[in] aInstance A pointer to an OpenThread instance.

◆ otIp6RemoveUnicastAddress()

otError otIp6RemoveUnicastAddress	(	otInstance *	`aInstance,`
		const otIp6Address *	`aAddress`
	)

Remove a Network Interface Address from the Thread interface.

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in]	`aAddress`	A pointer to an IP Address.

Return values

`OT_ERROR_NONE`	Successfully removed the Network Interface Address.
`OT_ERROR_INVALID_ARGS`	The IP Address indicated by `aAddress` is an internal address.
`OT_ERROR_NOT_FOUND`	The IP Address indicated by `aAddress` was not found.

◆ otIp6RemoveUnsecurePort()

otError otIp6RemoveUnsecurePort	(	otInstance *	`aInstance,`
		uint16_t	`aPort`
	)

This function removes a port from the allowed unsecure port list.

Note: This function removes aPort by overwriting aPort with the element after aPort in the internal port list. Be careful when calling otIp6GetUnsecurePorts() followed by otIp6RemoveUnsecurePort() to remove unsecure ports.

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in]	`aPort`	The port value.

Return values

`OT_ERROR_NONE`	The port was successfully removed from the allowed unsecure port list.
`OT_ERROR_INVALID_ARGS`	The port is invalid (value 0 is reserved for internal use).
`OT_ERROR_NOT_FOUND`	The port was not found in the unsecure port list.

◆ otIp6SelectSourceAddress()

otError otIp6SelectSourceAddress	(	otInstance *	`aInstance,`
		otMessageInfo *	`aMessageInfo`
	)

This function perform OpenThread source address selection.

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in,out]	`aMessageInfo`	A pointer to the message information.

Return values

`OT_ERROR_NONE`	Found a source address and is filled into mSockAddr of `aMessageInfo` .
`OT_ERROR_NOT_FOUND`	No source address was found and `aMessageInfo` is unchanged.

◆ otIp6Send()

otError otIp6Send	(	otInstance *	`aInstance,`
		otMessage *	`aMessage`
	)

This function sends an IPv6 datagram via the Thread interface.

The caller transfers ownership of aMessage when making this call. OpenThread will free aMessage when processing is complete, including when a value other than OT_ERROR_NONE is returned.

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in]	`aMessage`	A pointer to the message buffer containing the IPv6 datagram.

Return values

`OT_ERROR_NONE`	Successfully processed the message.
`OT_ERROR_DROP`	Message was well-formed but not fully processed due to packet processing rules.
`OT_ERROR_NO_BUFS`	Could not allocate necessary message buffers when processing the datagram.
`OT_ERROR_NO_ROUTE`	No route to host.
`OT_ERROR_INVALID_SOURCE_ADDRESS`	Source address is invalid, e.g. an anycast address or a multicast address.
`OT_ERROR_PARSE`	Encountered a malformed header when processing the message.

◆ otIp6SetAddressCallback()

void otIp6SetAddressCallback	(	otInstance *	`aInstance,`
		otIp6AddressCallback	`aCallback,`
		void *	`aCallbackContext`
	)

This function registers a callback to notify internal IPv6 address changes.

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in]	`aCallback`	A pointer to a function that is called when an internal IPv6 address is added or removed. NULL to disable the callback.
[in]	`aCallbackContext`	A pointer to application-specific context.

◆ otIp6SetEnabled()

otError otIp6SetEnabled	(	otInstance *	`aInstance,`
		bool	`aEnabled`
	)

This function brings up/down the IPv6 interface.

Call this function to enable/disable IPv6 communication.

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in]	`aEnabled`	TRUE to enable IPv6, FALSE otherwise.

Return values

`OT_ERROR_NONE`	Successfully brought the IPv6 interface up/down.
`OT_ERROR_INVALID_STATE`	IPv6 interface is not available since device is operating in raw-link mode (applicable only when `OPENTHREAD_CONFIG_LINK_RAW_ENABLE` feature is enabled).

◆ otIp6SetMeshLocalIid()

otError otIp6SetMeshLocalIid	(	otInstance *	`aInstance,`
		const otIp6InterfaceIdentifier *	`aIid`
	)

This function sets the Mesh Local IID (for test purpose).

Only available when OPENTHREAD_CONFIG_REFERENCE_DEVICE_ENABLE is enabled.

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in]	`aIid`	A pointer to the Mesh Local IID to set.

Return values

`OT_ERROR_NONE`	Successfully set the Mesh Local IID.
`OT_ERROR_INVALID_STATE`	Thread protocols are enabled.

◆ otIp6SetMulticastPromiscuousEnabled()

void otIp6SetMulticastPromiscuousEnabled	(	otInstance *	`aInstance,`
		bool	`aEnabled`
	)

Enable multicast promiscuous mode on the Thread interface.

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in]	`aEnabled`	TRUE to enable Multicast Promiscuous mode, FALSE otherwise.

See also: otIp6IsMulticastPromiscuousEnabled

◆ otIp6SetReceiveCallback()

void otIp6SetReceiveCallback	(	otInstance *	`aInstance,`
		otIp6ReceiveCallback	`aCallback,`
		void *	`aCallbackContext`
	)

This function registers a callback to provide received IPv6 datagrams.

By default, this callback does not pass Thread control traffic. See otIp6SetReceiveFilterEnabled() to change the Thread control traffic filter setting.

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in]	`aCallback`	A pointer to a function that is called when an IPv6 datagram is received or NULL to disable the callback.
[in]	`aCallbackContext`	A pointer to application-specific context.

See also: otIp6IsReceiveFilterEnabled; otIp6SetReceiveFilterEnabled

◆ otIp6SetReceiveFilterEnabled()

void otIp6SetReceiveFilterEnabled	(	otInstance *	`aInstance,`
		bool	`aEnabled`
	)

This function sets whether or not Thread control traffic is filtered out when delivering IPv6 datagrams via the callback specified in otIp6SetReceiveCallback() .

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in]	`aEnabled`	TRUE if Thread control traffic is filtered out, FALSE otherwise.

See also: otIp6SetReceiveCallback; otIsReceiveIp6FilterEnabled

◆ otIp6SetSlaacEnabled()

void otIp6SetSlaacEnabled	(	otInstance *	`aInstance,`
		bool	`aEnabled`
	)

This function enables/disables the SLAAC module.

This function requires the build-time feature OPENTHREAD_CONFIG_IP6_SLAAC_ENABLE to be enabled.

When SLAAC module is enabled, SLAAC addresses (based on on-mesh prefixes in Network Data) are added to the interface. When SLAAC module is disabled any previously added SLAAC address is removed.

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in]	`aEnabled`	TRUE to enable, FALSE to disable.

◆ otIp6SetSlaacPrefixFilter()

void otIp6SetSlaacPrefixFilter	(	otInstance *	`aInstance,`
		otIp6SlaacPrefixFilter	`aFilter`
	)

This function sets the SLAAC module filter handler.

This function requires the build-time feature OPENTHREAD_CONFIG_IP6_SLAAC_ENABLE to be enabled.

The filter handler is called by SLAAC module when it is about to add a SLAAC address based on a prefix to decide whether the address should be added or not.

A NULL filter handler disables filtering and allows all SLAAC addresses to be added.

If this function is not called, the default filter used by SLAAC module will be NULL (filtering is disabled).

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in]	`aFilter`	A pointer to SLAAC prefix filter handler, or NULL to disable filtering.

◆ otIp6SockAddrToString()

void otIp6SockAddrToString	(	const otSockAddr *	`aSockAddr,`
		char *	`aBuffer,`
		uint16_t	`aSize`
	)

This function converts a given IPv6 socket address to a human-readable string.

The IPv6 socket address string is formatted as "[<address>]:<port>" where `<address> is shown as 16 hex values separated by ':' and <port> is the port number in decimal format (i.e., "[%x:%x:...:%x]:%u")

If the resulting string does not fit in aBuffer (within its aSize characters), the string will be truncated but the outputted string is always null-terminated.

Parameters

[in]	`aSockAddr`	A pointer to an IPv6 socket address (MUST NOT be NULL).
[out]	`aBuffer`	A pointer to a char array to output the string (MUST NOT be NULL).
[in]	`aSize`	The size of `aBuffer` (in bytes). Recommended to use `OT_IP6_SOCK_ADDR_STRING_SIZE` .

◆ otIp6SubscribeMulticastAddress()

otError otIp6SubscribeMulticastAddress	(	otInstance *	`aInstance,`
		const otIp6Address *	`aAddress`
	)

Subscribe the Thread interface to a Network Interface Multicast Address.

The passed in instance aAddress will be copied by the Thread interface. The Thread interface only supports a fixed number of externally added multicast addresses. See OPENTHREAD_CONFIG_IP6_MAX_EXT_MCAST_ADDRS.

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in]	`aAddress`	A pointer to an IP Address.

Return values

`OT_ERROR_NONE`	Successfully subscribed to the Network Interface Multicast Address.
`OT_ERROR_ALREADY`	The multicast address is already subscribed.
`OT_ERROR_INVALID_ARGS`	The IP Address indicated by `aAddress` is invalid address.
`OT_ERROR_INVALID_STATE`	The Network Interface is not up.
`OT_ERROR_NO_BUFS`	The Network Interface is already storing the maximum allowed external multicast addresses.

◆ otIp6UnsubscribeMulticastAddress()

otError otIp6UnsubscribeMulticastAddress	(	otInstance *	`aInstance,`
		const otIp6Address *	`aAddress`
	)

Unsubscribe the Thread interface to a Network Interface Multicast Address.

Parameters

[in]	`aInstance`	A pointer to an OpenThread instance.
[in]	`aAddress`	A pointer to an IP Address.

Return values

`OT_ERROR_NONE`	Successfully unsubscribed to the Network Interface Multicast Address.
`OT_ERROR_INVALID_ARGS`	The IP Address indicated by `aAddress` is an internal address.
`OT_ERROR_NOT_FOUND`	The IP Address indicated by `aAddress` was not found.

IPv6 API > IPv6 Networking

Classes

Macros

Typedefs

Enumerations

Functions

Variables

Detailed Description

Typedef Documentation

◆ otIp6AddressCallback

◆ otIp6ReceiveCallback

◆ otIp6RegisterMulticastListenersCallback

◆ otIp6SlaacPrefixFilter

Enumeration Type Documentation

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

Function Documentation

◆ otIp6AddressFromString()

◆ otIp6AddressToString()

◆ otIp6AddUnicastAddress()

◆ otIp6AddUnsecurePort()

◆ otIp6ArePrefixesEqual()

◆ otIp6GetMulticastAddresses()

◆ otIp6GetUnicastAddresses()

◆ otIp6GetUnsecurePorts()

◆ otIp6IsAddressEqual()

◆ otIp6IsAddressUnspecified()

◆ otIp6IsEnabled()

◆ otIp6IsMulticastPromiscuousEnabled()

◆ otIp6IsReceiveFilterEnabled()

◆ otIp6IsSlaacEnabled()

◆ otIp6NewMessage()

◆ otIp6NewMessageFromBuffer()

◆ otIp6PrefixMatch()

◆ otIp6PrefixToString()

◆ otIp6ProtoToString()

◆ otIp6RegisterMulticastListeners()

◆ otIp6RemoveAllUnsecurePorts()

◆ otIp6RemoveUnicastAddress()

◆ otIp6RemoveUnsecurePort()

◆ otIp6SelectSourceAddress()

◆ otIp6Send()

◆ otIp6SetAddressCallback()

◆ otIp6SetEnabled()

◆ otIp6SetMeshLocalIid()

◆ otIp6SetMulticastPromiscuousEnabled()

◆ otIp6SetReceiveCallback()

◆ otIp6SetReceiveFilterEnabled()

◆ otIp6SetSlaacEnabled()

◆ otIp6SetSlaacPrefixFilter()

◆ otIp6SockAddrToString()

◆ otIp6SubscribeMulticastAddress()

◆ otIp6UnsubscribeMulticastAddress()

IPv6
API > IPv6 Networking