Network protocol registry

Registry to receive messages of a specified protocol type by GNRC.

GNRC_NETREG_ENTRY_INIT_PID( demux_ctx, pid)

Initializes a netreg entry statically with PID.

{ NULL, demux_ctx, { pid } }

Parameters

demux_ctx:The netreg.h::gnrc_netreg_entry::demux_ctx for the netreg entry pid:The PID of the registering thread

Return values

• An initialized netreg entry

GNRC_NETREG_ENTRY_INIT_MBOX( demux_ctx, mbox)

Initializes a netreg entry statically with mbox.

{ NULL, demux_ctx, \
                                                       GNRC_NETREG_TYPE_MBOX, \
                                                       { .mbox = mbox } }

Parameters

demux_ctx:The netreg.h::gnrc_netreg_entry::demux_ctx for the netreg entry mbox:Target mailbox for the registry entry

Note

Only available with Mailbox IPC extension.

Return values

• An initialized netreg entry

GNRC_NETREG_ENTRY_INIT_CB( demux_ctx, cbd)

Initializes a netreg entry statically with callback.

{ NULL, demux_ctx, \
                                                      GNRC_NETREG_TYPE_CB, \
                                                      { .cbd = cbd } }

Parameters

demux_ctx:The netreg.h::gnrc_netreg_entry::demux_ctx for the netreg entry cbd:Target callback for the registry entry

Note

Only available with Callback extension.

Return values

• An initialized netreg entry

void gnrc_netreg_entry_init_pid(netreg.h::gnrc_netreg_entry_t * entry, uint32_t demux_ctx, kernel_types.h::kernel_pid_t pid)

Initializes a netreg entry dynamically with PID.

Parameters

entry:A netreg entry demux_ctx:The netreg.h::gnrc_netreg_entry::demux_ctx for the netreg entry pid:The PID of the registering thread

void gnrc_netreg_entry_init_mbox(netreg.h::gnrc_netreg_entry_t * entry, uint32_t demux_ctx, mbox_t * mbox)

Initializes a netreg entry dynamically with mbox.

Parameters

entry:A netreg entry demux_ctx:The netreg.h::gnrc_netreg_entry::demux_ctx for the netreg entry mbox:Target mailbox for the registry entry

Note

Only available with Mailbox IPC extension.

void gnrc_netreg_entry_init_cb(netreg.h::gnrc_netreg_entry_t * entry, uint32_t demux_ctx, gnrc_netreg_entry_cbd_t * cbd)

Initializes a netreg entry dynamically with callback.

Parameters

entry:A netreg entry demux_ctx:The netreg.h::gnrc_netreg_entry::demux_ctx for the netreg entry cbd:Target callback for the registry entry

Note

Only available with Callback extension.

enum gnrc_netreg_type_t

GNRC_NETREG_TYPE_DEFAULT = 0

Use default IPC for netapi operations.

Note

Implicitly chosen without gnrc_netapi_mbox and gnrc_netapi_callbacks modules.

GNRC_NETREG_TYPE_MBOX

Use centralized IPC for netapi operations.

Note

Only available with gnrc_netapi_mbox module.

GNRC_NETREG_TYPE_CB

Use function callbacks for netapi operations.

Note

Only available with gnrc_netapi_callbacks module.

void(* gnrc_netreg_entry_cb_t()

Packet handler callback for netreg entries with callback.

Note

Only available with Callback extension.

Parameters

cmd:GNRC communication interface command type. Must be either netapi.h::GNRC_NETAPI_MSG_TYPE_SND or netapi.h::GNRC_NETAPI_MSG_TYPE_RCV pkt:The packet to handle. ctx:Application context.

struct gnrc_netreg_entry gnrc_netreg_entry_t

Entry to the Network protocol registry.

void gnrc_netreg_init(void)

Initializes module.

int gnrc_netreg_register(nettype.h::gnrc_nettype_t type, netreg.h::gnrc_netreg_entry_t * entry)

Registers a thread to the registry.

The semantics are: Thread netreg.h::gnrc_netreg_entry::pid is interested in packets of protocol type with context netreg.h::gnrc_netreg_entry::demux_ctx.

Parameters

type:Type of the protocol. Must not be < GNRC_NETTYPE_UNDEF or >= GNRC_NETTYPE_NUMOF. entry:An entry you want to add to the registry. This needs to be initialized before hand using the or initialization helpers.

Return values

• 0 on success
• -EINVAL if type was < GNRC_NETTYPE_UNDEF or >= GNRC_NETTYPE_NUMOF

void gnrc_netreg_unregister(nettype.h::gnrc_nettype_t type, netreg.h::gnrc_netreg_entry_t * entry)

Removes a thread from the registry.

Parameters

type:Type of the protocol. entry:An entry you want to remove from the registry.

netreg.h::gnrc_netreg_entry_t * gnrc_netreg_lookup(nettype.h::gnrc_nettype_t type, uint32_t demux_ctx)

Searches for entries with given parameters in the registry and returns the first found.

Parameters

type:Type of the protocol. demux_ctx:The demultiplexing context for the registered thread. See netreg.h::gnrc_netreg_entry::demux_ctx.

Return values

• The first entry fitting the given parameters on success
• NULL if no entry can be found.

int gnrc_netreg_num(nettype.h::gnrc_nettype_t type, uint32_t demux_ctx)

Returns number of entries with the same netreg.h::gnrc_netreg_entry::type and netreg.h::gnrc_netreg_entry::demux_ctx.

Parameters

type:Type of the protocol. demux_ctx:The demultiplexing context for the registered thread. See netreg.h::gnrc_netreg_entry::demux_ctx.

Return values

• Number of entries with the same netreg.h::gnrc_netreg_entry::type and netreg.h::gnrc_netreg_entry::demux_ctx as the given parameters.

netreg.h::gnrc_netreg_entry_t * gnrc_netreg_getnext(netreg.h::gnrc_netreg_entry_t * entry)

Returns the next entry after entry with the same netreg.h::gnrc_netreg_entry::type and netreg.h::gnrc_netreg_entry::demux_ctx as the given entry.

Parameters

entry:A registry entry retrieved by netreg.h::gnrc_netreg_lookup() or netreg.h::gnrc_netreg_getnext(). Must not be NULL.

Return values

• The next entry after entry fitting the given parameters on success
• NULL if no entry new entry can be found.

int gnrc_netreg_calc_csum(include/net/gnrc/pkt.h::gnrc_pktsnip_t * hdr, include/net/gnrc/pkt.h::gnrc_pktsnip_t * pseudo_hdr)

Calculates the checksum for a header.

Parameters

hdr:The header the checksum should be calculated for. pseudo_hdr:The header the pseudo header shall be generated from. NULL if none is needed.

Return values

• 0, on success.
• -EINVAL, if pseudo_hdr is NULL but a pseudo header was required.
• -ENOENT, if Network protocol registry does not know how to calculate checksum for include/net/gnrc/pkt.h::gnrc_pktsnip::type of hdr.

GNRC_NETREG_DEMUX_CTX_ALL

Demux context value to get all packets of a certain type.

(0xffff0000)

See also

netreg.h::gnrc_netreg_entry::demux_ctx

struct gnrc_netreg_entry_cbd_t

Callback + Context descriptor.

Note

Only available with Callback extension.

netreg.h::gnrc_netreg_entry_cb_t cb

the callback

void * ctx

application context for the callback

struct gnrc_netreg_entry

Entry to the Network protocol registry.

struct gnrc_netreg_entry * next

next element in list

uint32_t demux_ctx

The demultiplexing context for the registering thread.

This can be defined by the network protocol themselves. E. g. protocol numbers / next header numbers in IPv4/IPv6, ports in UDP/TCP, or similar.

netreg.h::gnrc_netreg_type_t type

Type of the registry entry.

Note

Only available with Mailbox IPC extension or Callback extension.

kernel_types.h::kernel_pid_t pid

The PID of the registering thread.

mbox_t * mbox

Target mailbox for the registry entry.

Note

Only available with Mailbox IPC extension.

gnrc_netreg_entry_cbd_t * cbd

Target callback for the registry entry.

Note

Only available with Callback extension.

union gnrc_netreg_entry::@191 target

Target for the registry entry.