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# IP stack config
# Copyright (c) 2016 Intel Corporation.
# Copyright (c) 2021 Nordic Semiconductor
# Copyright (c) 2023 Arm Limited (or its affiliates). All rights reserved.
# SPDX-License-Identifier: Apache-2.0
menu "IP stack"
# Hidden option enabled whenever an IP stack is available.
config NET_IP
bool
default y if NET_IPV6 || NET_IPV4
# Hidden option enabled whenever an IP fragmentation is enabled.
config NET_IP_FRAGMENT
bool
default y if NET_IPV6_FRAGMENT || NET_IPV4_FRAGMENT
# Hidden option selected by net connection based socket implementations
# to draw in all code required for connection infrastructure.
config NET_CONNECTION_SOCKETS
bool
config NET_NATIVE
bool "Native network stack support"
default y
help
Enables Zephyr native IP stack. If you disable this, then
you need to enable the offloading support if you want to
have IP connectivity.
# Hidden options for enabling native IPv6/IPv4. Using these options
# avoids having "defined(CONFIG_NET_IPV6) && defined(CONFIG_NET_NATIVE)"
# in the code as we can have "defined(CONFIG_NET_NATIVE_IPV6)" instead.
config NET_NATIVE_IP
bool
depends on NET_NATIVE
default y if NET_IP
config NET_NATIVE_IPV6
bool
depends on NET_NATIVE
default y if NET_IPV6
config NET_NATIVE_IPV4
bool
depends on NET_NATIVE
default y if NET_IPV4
config NET_NATIVE_TCP
bool
depends on NET_NATIVE
default y if NET_TCP
config NET_NATIVE_UDP
bool
depends on NET_NATIVE
default y if NET_UDP
config NET_OFFLOAD
bool "Offload IP stack"
help
Enables TCP/IP stack to be offload to a co-processor.
config NET_OFFLOADING_SUPPORT
bool
default y if NET_OFFLOAD || NET_SOCKETS_OFFLOAD
help
Hidden option that is set if either NET_OFFLOAD or
NET_SOCKETS_OFFLOAD is set. This allows us to check
only one option instead of two.
if NET_OFFLOAD
module = NET_OFFLOAD
module-dep = NET_LOG
module-str = Log level for offload layer
module-help = Enables offload layer to output debug messages.
source "subsys/net/Kconfig.template.log_config.net"
endif # NET_OFFLOAD
config NET_RAW_MODE
bool
help
This is a very specific option used to built only the very minimal
part of the net stack in order to get network drivers working without
any net stack above: core, L2 etc... Basically this will build only
net_pkt part. It is currently used only by IEEE 802.15.4 drivers,
though any type of net drivers could use it.
choice NET_QEMU_NETWORKING
prompt "Qemu networking"
default NET_QEMU_PPP if NET_PPP
default NET_QEMU_SLIP
depends on QEMU_TARGET
help
Can be used to select how the network connectivity is established
from inside qemu to host system. This can be done either via
serial connection (SLIP) or via Qemu ethernet driver.
config NET_QEMU_SLIP
bool "SLIP"
help
Connect to host or to another Qemu via SLIP.
config NET_QEMU_PPP
bool "PPP"
help
Connect to host via PPP.
config NET_QEMU_ETHERNET
bool "Ethernet"
help
Connect to host system via Qemu ethernet driver support. One such
driver that Zephyr supports is Intel e1000 ethernet driver.
config NET_QEMU_USER
bool "SLIRP"
help
Connect to host system via Qemu's built-in User Networking support. This
is implemented using "slirp", which provides a full TCP/IP stack within
QEMU and uses that stack to implement a virtual NAT'd network.
endchoice
config NET_QEMU_USER_EXTRA_ARGS
string "Qemu User Networking Args"
depends on NET_QEMU_USER
default ""
help
Extra arguments passed to QEMU when User Networking is enabled. This may
include host / guest port forwarding, device id, Network address
information etc. This string is appended to the QEMU "-net user" option.
if !NET_RAW_MODE
config NET_INIT_PRIO
int
default 90
help
Network initialization priority level. This number tells how
early in the boot the network stack is initialized.
config NET_IP_DSCP_ECN
bool "DSCP/ECN processing at IP layer"
depends on NET_IP
default y
help
Specify whether DSCP/ECN values are processed at IP layer. The values
are encoded within ToS field in IPv4 and TC field in IPv6.
source "subsys/net/ip/Kconfig.ipv6"
source "subsys/net/ip/Kconfig.ipv4"
config NET_IPV4_MAPPING_TO_IPV6
bool "Support IPv4 mapped on IPv6 addresses"
depends on NET_NATIVE_IPV6
help
Support v4-mapped-on-v6 address type. This allows IPv4 and IPv6
to share a local port space. When the application gets an IPv4
connection or packet to an IPv6 socket, its source address will
be mapped to IPv6. This is turned off by default which means
that IPV6_V6ONLY socket option is always on. If you enable this
option, then you can still control the behaviour of the socket
via the IPV6_V6ONLY option at runtime.
config NET_SHELL
bool "Network shell utilities"
select SHELL
select NET_IPV4_IGMP if NET_IPV4
select REQUIRES_FLOAT_PRINTF
help
Activate shell module that provides network commands like
ping to the console.
config NET_SHELL_DYN_CMD_COMPLETION
bool "Network shell dynamic command completion"
depends on NET_SHELL
default y
help
Enable various net-shell command to support dynamic command
completion. This means that for example the nbr command can
automatically complete the neighboring IPv6 address and user
does not need to type it manually.
Please note that this uses more memory in order to save the
dynamic command strings. For example for nbr command the
increase is 320 bytes (8 neighbors * 40 bytes for IPv6 address
length) by default. Other dynamic completion commands in
net-shell require also some smaller amount of memory.
config NET_SHELL_REQUIRE_TX_THREAD
bool
depends on NET_SHELL && (SHELL_BACKEND_TELNET || SHELL_BACKEND_MQTT)
default y if NET_ARP
help
Hidden symbol indicating that network shell requires separate TX
thread due to possible deadlocks during shell/net stack operations.
config NET_TC_TX_COUNT
int "How many Tx traffic classes to have for each network device"
default 1 if USERSPACE || USB_DEVICE_NETWORK || \
NET_SHELL_REQUIRE_TX_THREAD
default 0
range 1 NET_TC_NUM_PRIORITIES if NET_TC_NUM_PRIORITIES<=8 && \
(USERSPACE || NET_SHELL_REQUIRE_TX_THREAD)
range 0 NET_TC_NUM_PRIORITIES if NET_TC_NUM_PRIORITIES<=8
range 1 8 if USERSPACE || NET_SHELL_REQUIRE_TX_THREAD
range 0 8
help
Define how many Tx traffic classes (queues) the system should have
when sending a network packet. The network packet priority can then
be mapped to this traffic class so that higher prioritized packets
can be processed before lower prioritized ones. Each queue is handled
by a separate thread which will need RAM for stack space.
Only increase the value from 1 if you really need this feature.
The default value is 1 which means that all the network traffic is
handled equally. In this implementation, the higher traffic class
value corresponds to lower thread priority.
If you select 0 here, then it means that all the network traffic
is pushed to the driver directly without any queues.
Note that if USERSPACE support is enabled, then currently we need to
enable at least 1 TX thread.
config NET_TC_RX_COUNT
int "How many Rx traffic classes to have for each network device"
default 1
range 1 NET_TC_NUM_PRIORITIES if NET_TC_NUM_PRIORITIES<=8 && USERSPACE
range 0 NET_TC_NUM_PRIORITIES if NET_TC_NUM_PRIORITIES<=8
range 1 8 if USERSPACE
range 0 8
help
Define how many Rx traffic classes (queues) the system should have
when receiving a network packet. The network packet priority can then
be mapped to this traffic class so that higher prioritized packets
can be processed before lower prioritized ones. Each queue is handled
by a separate thread which will need RAM for stack space.
Only increase the value from 1 if you really need this feature.
The default value is 1 which means that all the network traffic is
handled equally. In this implementation, the higher traffic class
value corresponds to lower thread priority.
If you select 0 here, then it means that all the network traffic
is pushed from the driver to application thread without any
intermediate RX queue. There is always a receive socket queue between
device driver and application. Disabling RX thread means that the
network device driver, that is typically running in IRQ context, will
handle the packet all the way to the application. This might cause
other incoming packets to be lost if the RX processing takes long
time.
Note that if USERSPACE support is enabled, then currently we need to
enable at least 1 RX thread.
config NET_TC_SKIP_FOR_HIGH_PRIO
bool "Push high priority packets directly to network driver"
help
If this is set, then high priority (>= NET_PRIORITY_CA) net_pkt will
be pushed directly to network driver and will skip the traffic class
queues. This is currently not enabled by default.
choice NET_TC_THREAD_TYPE
prompt "How the network RX/TX threads should work"
help
Please select the RX/TX threads to be either pre-emptive or
co-operative.
config NET_TC_THREAD_COOPERATIVE
bool "Use co-operative TX/RX threads"
depends on COOP_ENABLED
help
With co-operative threads, the thread cannot be pre-empted.
config NET_TC_THREAD_PREEMPTIVE
bool "Use pre-emptive TX/RX threads [EXPERIMENTAL]"
depends on PREEMPT_ENABLED
select EXPERIMENTAL
help
With pre-emptive threads, the thread can be pre-empted.
endchoice
config NET_TC_NUM_PRIORITIES
int
default NUM_COOP_PRIORITIES if NET_TC_THREAD_COOPERATIVE
default NUM_PREEMPT_PRIORITIES if NET_TC_THREAD_PREEMPTIVE
config NET_TC_THREAD_PRIO_CUSTOM
bool "Customize traffic class thread priority"
help
Customise net threads priority by each.
if NET_TC_THREAD_PRIO_CUSTOM
config NET_TC_TX_THREAD_BASE_PRIO
int "Transmit traffic class base thread priority"
default 0
help
Transmit traffic class threads priority will increase/decrease
from this priority.
If NET_TC_TX_COUNT is 1, this will be transmit traffic class
thread priority.
config NET_TC_RX_THREAD_BASE_PRIO
int "Receive traffic class base thread priority"
default 0
help
Receive traffic class threads priority will increase/decrease
from this priority.
If NET_TC_RX_COUNT is 1, this will be receive traffic class
thread priority.
endif # NET_TC_THREAD_CUSTOM_PRIO
choice
prompt "Priority to traffic class mapping"
help
Select mapping to use to map network packet priorities to traffic
classes.
config NET_TC_MAPPING_STRICT
bool "Strict priority mapping"
help
This is the recommended default priority to traffic class mapping.
Use it for implementations that do not support the credit-based
shaper transmission selection algorithm.
See 802.1Q, chapter 8.6.6 for more information.
config NET_TC_MAPPING_SR_CLASS_A_AND_B
bool "SR class A and class B mapping"
depends on NET_TC_TX_COUNT >= 2
depends on NET_TC_RX_COUNT >= 2
help
This is the recommended priority to traffic class mapping for a
system that supports SR (Stream Reservation) class A and SR class B.
See 802.1Q, chapter 34.5 for more information.
config NET_TC_MAPPING_SR_CLASS_B_ONLY
bool "SR class B only mapping"
depends on NET_TC_TX_COUNT >= 2
depends on NET_TC_RX_COUNT >= 2
help
This is the recommended priority to traffic class mapping for a
system that supports SR (Stream Reservation) class B only.
See 802.1Q, chapter 34.5 for more information.
endchoice
config NET_TX_DEFAULT_PRIORITY
int "Default network TX packet priority if none have been set"
default 1
range 0 7
help
What is the default network packet priority if user has not specified
one. The value 0 means lowest priority and 7 is the highest.
config NET_RX_DEFAULT_PRIORITY
int "Default network RX packet priority if none have been set"
default 0
range 0 7
help
What is the default network RX packet priority if user has not set
one. The value 0 means lowest priority and 7 is the highest.
config NET_ALLOW_ANY_PRIORITY
bool "Allow any network packet priority to be used"
help
If this is set, then any user given network packet priority can be used. Otherwise
the network packet priorities are limited to 0-7 range.
config NET_IP_ADDR_CHECK
bool "Check IP address validity before sending IP packet"
default y
help
Check that either the source or destination address is
correct before sending either IPv4 or IPv6 network packet.
config NET_MAX_ROUTERS
int "How many routers are supported"
default 2 if NET_IPV4 && NET_IPV6
default 1 if NET_IPV4 && !NET_IPV6
default 1 if !NET_IPV4 && NET_IPV6
range 1 254
help
The value depends on your network needs.
# Normally the route support is enabled by RPL or similar technology
# that needs to use the routing infrastructure.
config NET_ROUTE
bool
depends on NET_IPV6_NBR_CACHE
default y if NET_IPV6_NBR_CACHE
# Temporarily hide the routing option as we do not have RPL in the system
# that used to populate the routing table.
config NET_ROUTING
bool
depends on NET_ROUTE
help
Allow IPv6 routing between different network interfaces and
technologies. Currently this has limited use as some entity
would need to populate the routing table. RPL used to do that
earlier but currently there is no RPL support in Zephyr.
config NET_MAX_ROUTES
int "Max number of routing entries stored."
default NET_IPV6_MAX_NEIGHBORS
depends on NET_ROUTE
help
This determines how many entries can be stored in routing table.
config NET_MAX_NEXTHOPS
int "Max number of next hop entries stored."
default NET_MAX_ROUTES
depends on NET_ROUTE
help
This determines how many entries can be stored in nexthop table.
config NET_ROUTE_MCAST
bool "Multicast Routing / Forwarding"
depends on NET_ROUTE
help
Activates multicast routing/forwarding
config NET_MAX_MCAST_ROUTES
int "Max number of multicast routing entries stored."
default 1
depends on NET_ROUTE_MCAST
help
This determines how many entries can be stored in multicast
routing table.
config NET_MCAST_ROUTE_MAX_IFACES
int "Max number of network interfaces per multicast routing entry"
default 1
range 1 8
depends on NET_ROUTE_MCAST
help
Determines how many network interfaces can be assigned to a
single multicast route entry.
source "subsys/net/ip/Kconfig.tcp"
config NET_TEST_PROTOCOL
bool "JSON based test protocol (UDP)"
help
Enable JSON based test protocol (UDP).
config NET_UDP
bool "UDP"
default y
depends on NET_IP
help
The value depends on your network needs.
config NET_UDP_CHECKSUM
bool "Check UDP checksum"
default y
depends on NET_UDP
help
Enables UDP handler to check UDP checksum. If the checksum is invalid,
then the packet is discarded.
config NET_UDP_MISSING_CHECKSUM
bool "Accept missing checksum (IPv4 only)"
default y
depends on NET_UDP && NET_IPV4
help
RFC 768 states the possibility to have a missing checksum, for
debugging purposes for instance. That feature is however valid only
for IPv4 and on reception only, since Zephyr will always compute the
UDP checksum in transmission path.
if NET_UDP
module = NET_UDP
module-dep = NET_LOG
module-str = Log level for UDP
module-help = Enables UDP handler output debug messages
source "subsys/net/Kconfig.template.log_config.net"
endif # NET_UDP
config NET_MAX_CONN
int "How many network connections are supported"
depends on NET_UDP || NET_TCP || NET_SOCKETS_PACKET || NET_SOCKETS_CAN
default 8 if NET_IPV6 && NET_IPV4
default 4
help
The value depends on your network needs. The value
should include both UDP and TCP connections.
config NET_MAX_CONTEXTS
int "Number of network contexts to allocate"
default 6
help
Each network context is used to describe a network 5-tuple that
is used when listening or sending network traffic. This is very
similar as one could call a network socket in some other systems.
config NET_CONTEXT_NET_PKT_POOL
bool "Net_buf TX pool / context"
default y if NET_TCP && NET_6LO
help
If enabled, then it is possible to fine-tune network packet pool
for each context when sending network data. If this setting is
enabled, then you should define the context pools in your application
using NET_PKT_TX_POOL_DEFINE() and NET_PKT_DATA_POOL_DEFINE()
macros and tie these pools to desired context using the
net_context_setup_pools() function.
config NET_CONTEXT_SYNC_RECV
bool "Support synchronous functionality in net_context_recv() API"
default y
help
You can disable sync support to save some memory if you are calling
net_context_recv() in async way only when timeout is set to 0.
config NET_CONTEXT_CHECK
bool "Check options when calling various net_context functions"
default y
help
If you know that the options passed to net_context...() functions
are ok, then you can disable the checks to save some memory.
config NET_CONTEXT_PRIORITY
bool "Add priority support to net_context"
help
It is possible to prioritize network traffic. This requires
also traffic class support to work as expected.
config NET_CONTEXT_TXTIME
bool "Add TXTIME support to net_context"
select NET_PKT_TXTIME
help
It is possible to add information when the outgoing network packet
should be sent. The TX time information should be placed into
ancillary data field in sendmsg call.
config NET_CONTEXT_RCVTIMEO
bool "Add RCVTIMEO support to net_context"
help
It is possible to time out receiving a network packet. The timeout
time is configurable run-time in the application code. For network
sockets timeout is configured per socket with
setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, ...) function.
config NET_CONTEXT_SNDTIMEO
bool "Add SNDTIMEO support to net_context"
help
It is possible to time out sending a network packet. The timeout
time is configurable run-time in the application code. For network
sockets timeout is configured per socket with
setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, ...) function.
config NET_CONTEXT_RCVBUF
bool "Add RCVBUF support to net_context"
help
If is possible to define the maximum socket receive buffer per socket.
The default value is set by CONFIG_NET_TCP_MAX_RECV_WINDOW_SIZE. For
TCP sockets, the rcvbuf will determine the receive window size.
config NET_CONTEXT_SNDBUF
bool "Add SNDBUF support to net_context"
help
It is possible to define the maximum socket send buffer per socket.
For TCP sockets, the sndbuf will determine the total size of queued
data in the TCP layer.
config NET_CONTEXT_DSCP_ECN
bool "Add support for setting DSCP/ECN IP properties on net_context"
depends on NET_IP_DSCP_ECN
default y
help
Allow to set Differentiated Services and Explicit Congestion
Notification values on net_context. Those values are then used in
IPv4/IPv6 header when sending packets over net_context.
config NET_CONTEXT_REUSEADDR
bool "Add REUSEADDR support to net_context"
default y if NET_TCP || NET_UDP
help
Allow to set the SO_REUSEADDR flag on a socket. This enables multiple
sockets to bind to the same local IP address.
config NET_CONTEXT_REUSEPORT
bool "Add REUSEPORT support to net_context"
default y if NET_TCP || NET_UDP
help
Allow to set the SO_REUSEPORT flag on a socket. This enables multiple
sockets to bind to the same local IP address and port combination.
config NET_CONTEXT_RECV_PKTINFO
bool "Add receive PKTINFO support to net_context"
depends on NET_UDP
help
Allow to set the IP_PKTINFO or IPV6_RECVPKTINFO flags on a socket.
This way user can get extra information about the received data in the
socket.
endif # NET_RAW_MODE
config NET_SLIP_TAP
bool "TAP SLIP driver"
depends on NET_QEMU_SLIP
depends on NET_NATIVE
select SLIP
select UART_PIPE
select UART_INTERRUPT_DRIVEN
select SLIP_TAP
select NET_L2_ETHERNET
default y if (QEMU_TARGET && !NET_TEST)
help
SLIP TAP support is necessary when testing with QEMU. The host
needs to have tunslip6 with TAP support running in order to
communicate via the SLIP driver. See net-tools project at
https://github.com/zephyrproject-rtos/net-tools for more details.
config NET_TEST
bool "Network Testing"
help
Used for self-contained networking tests that do not require a
network device.
config NET_PKT_RX_COUNT
int "How many packet receives can be pending at the same time"
default 14 if NET_L2_ETHERNET
default 4
help
Each RX buffer will occupy smallish amount of memory.
See include/net/net_pkt.h and the sizeof(struct net_pkt)
config NET_PKT_TX_COUNT
int "How many packet sends can be pending at the same time"
default 14 if NET_L2_ETHERNET
default 4
help
Each TX buffer will occupy smallish amount of memory.
See include/net/net_pkt.h and the sizeof(struct net_pkt)
config NET_BUF_RX_COUNT
int "How many network buffers are allocated for receiving data"
default 36 if NET_L2_ETHERNET
default 16
help
Each data buffer will occupy CONFIG_NET_BUF_DATA_SIZE + smallish
header (sizeof(struct net_buf)) amount of data.
config NET_BUF_TX_COUNT
int "How many network buffers are allocated for sending data"
default 36 if NET_L2_ETHERNET
default 16
help
Each data buffer will occupy CONFIG_NET_BUF_DATA_SIZE + smallish
header (sizeof(struct net_buf)) amount of data.
choice
prompt "Network packet data allocator type"
default NET_BUF_FIXED_DATA_SIZE
help
Select the memory allocator for the network buffers that hold the
packet data.
config NET_BUF_FIXED_DATA_SIZE
bool "Fixed data size buffer"
help
Each buffer comes with a built time configured size. If runtime
requested is bigger than that, it will allocate as many net_buf
as necessary to reach that request.
config NET_BUF_VARIABLE_DATA_SIZE
bool "Variable data size buffer [EXPERIMENTAL]"
select EXPERIMENTAL
help
The buffer is dynamically allocated from runtime requested size.
endchoice
config NET_BUF_DATA_SIZE
int "Size of each network data fragment"
default 128
depends on NET_BUF_FIXED_DATA_SIZE
help
This value tells what is the fixed size of each network buffer.
config NET_BUF_DATA_POOL_SIZE
int "[DEPRECATED] Size of the memory pool where buffers are allocated from"
default 4096 if NET_L2_ETHERNET
default 2048
depends on NET_BUF_VARIABLE_DATA_SIZE
help
This config is deprecated, use NET_PKT_BUF_RX_DATA_POOL_SIZE and
NET_PKT_BUF_TX_DATA_POOL_SIZE instead.
config NET_PKT_BUF_RX_DATA_POOL_SIZE
int "Size of the RX memory pool where buffers are allocated from"
default NET_BUF_DATA_POOL_SIZE
depends on NET_BUF_VARIABLE_DATA_SIZE
help
This value tell what is the size of the RX memory pool where each
network buffer is allocated from.
config NET_PKT_BUF_TX_DATA_POOL_SIZE
int "Size of the TX memory pool where buffers are allocated from"
default NET_BUF_DATA_POOL_SIZE
depends on NET_BUF_VARIABLE_DATA_SIZE
help
This value tell what is the size of the TX memory pool where each
network buffer is allocated from.
config NET_PKT_BUF_USER_DATA_SIZE
int "Size of user_data available in rx and tx network buffers"
default 4
range 4 16
help
User data size used in rx and tx network buffers.
config NET_HEADERS_ALWAYS_CONTIGUOUS
bool
help
This a hidden option, which one should use with a lot of care.
NO bug reports will be accepted if that option is enabled!
You are warned.
If you are 100% sure the headers memory space is always in a
contiguous space, this will save stack usage and ROM in net core.
This is a possible case when using IPv4 only, with
NET_BUF_FIXED_DATA_SIZE enabled and NET_BUF_DATA_SIZE of 128 for
instance.
# If we are running network tests found in tests/net, then the NET_TEST is
# set and in that case we default to Dummy L2 layer as typically the tests
# use that by default.
choice NET_DEFAULT_IF
prompt "Default Network Interface"
default NET_DEFAULT_IF_DUMMY if NET_TEST
default NET_DEFAULT_IF_FIRST
help
If system has multiple interfaces enabled, then user shall be able
to choose default interface. Otherwise first interface will be the
default interface.
config NET_DEFAULT_IF_FIRST
bool "First available interface"
config NET_DEFAULT_IF_UP
bool "First interface which is up"
config NET_DEFAULT_IF_ETHERNET
bool "Ethernet"
depends on NET_L2_ETHERNET
config NET_DEFAULT_IF_IEEE802154
bool "IEEE 802.15.4"
depends on NET_L2_IEEE802154
config NET_DEFAULT_IF_OFFLOAD
bool "Offloaded interface"
depends on NET_OFFLOAD
config NET_DEFAULT_IF_DUMMY
bool "Dummy testing interface"
depends on NET_L2_DUMMY
config NET_DEFAULT_IF_CANBUS_RAW
bool "Socket CAN interface"
depends on NET_L2_CANBUS_RAW
config NET_DEFAULT_IF_PPP
bool "PPP interface"
depends on NET_L2_PPP
config NET_DEFAULT_IF_WIFI
bool "WiFi interface"
depends on NET_L2_ETHERNET
endchoice
config NET_INTERFACE_NAME
bool "Allow setting a name to a network interface"
default y
help
Allow application to set a name to the network interface in order
to simplify network interface management.
config NET_INTERFACE_NAME_LEN
int "Network interface max name length"
default 8
range 1 15
depends on NET_INTERFACE_NAME
help
Maximum length of the network interface name.
config NET_PKT_TIMESTAMP
bool "Network packet timestamp support"
help
Enable network packet timestamp support. This is needed for
example in gPTP which needs to know how long it takes to send
a network packet or for timed radio protocols like IEEE 802.15.4
CSL and TSCH.
config NET_PKT_TIMESTAMP_THREAD
bool "Create TX timestamp thread"
default y if NET_L2_PTP
depends on NET_PKT_TIMESTAMP
help
Create a TX timestamp thread that will pass the timestamped network
packets to some other module like gPTP for further processing.
If you just want to timestamp network packets and get information
how long the network packets flow in the system, you can disable
the thread support.
config NET_PKT_TIMESTAMP_STACK_SIZE
int "Timestamp thread stack size"
default 1024
depends on NET_PKT_TIMESTAMP_THREAD
help
Set the timestamp thread stack size in bytes. The timestamp
thread waits for timestamped TX frames and calls registered
callbacks.
config NET_PKT_TXTIME
bool "Network packet TX time support"
help
Enable network packet TX time support. This is needed for
when the application wants to set the exact time when the network
packet should be sent.
config NET_PKT_RXTIME_STATS
bool "Network packet RX time statistics"
select NET_PKT_TIMESTAMP
select NET_STATISTICS
depends on (NET_UDP || NET_TCP || NET_SOCKETS_PACKET) && NET_NATIVE
help
Enable network packet RX time statistics support. This is used to
calculate how long on average it takes for a packet to travel from
device driver to just before it is given to application. The RX
timing information can then be seen in network interface statistics
in net-shell.
The RX statistics are only calculated for UDP and TCP packets.
config NET_PKT_RXTIME_STATS_DETAIL
bool "Get extra receive detail statistics in RX path"
depends on NET_PKT_RXTIME_STATS
help
Store receive statistics detail information in certain key points
in RX path. This is very special configuration and will increase
the size of net_pkt so in typical cases you should not enable it.
The extra statistics can be seen in net-shell using "net stats"
command.
config NET_PKT_TXTIME_STATS
bool "Network packet TX time statistics"
select NET_PKT_TIMESTAMP
select NET_STATISTICS
depends on (NET_UDP || NET_TCP || NET_SOCKETS_PACKET) && NET_NATIVE
help
Enable network packet TX time statistics support. This is used to
calculate how long on average it takes for a packet to travel from
application to just before it is sent to network. The TX timing
information can then be seen in network interface statistics in
net-shell.
The RX calculation is done only for UDP, TCP or RAW packets,
but for TX we do not know the protocol so the TX packet timing is
done for all network protocol packets.
config NET_PKT_TXTIME_STATS_DETAIL
bool "Get extra transmit detail statistics in TX path"
depends on NET_PKT_TXTIME_STATS
help
Store receive statistics detail information in certain key points
in TX path. This is very special configuration and will increase
the size of net_pkt so in typical cases you should not enable it.
The extra statistics can be seen in net-shell using "net stats"
command.
config NET_PROMISCUOUS_MODE
bool "Promiscuous mode support"
select NET_MGMT
select NET_MGMT_EVENT
select NET_L2_ETHERNET_MGMT if NET_L2_ETHERNET
help
Enable promiscuous mode support. This only works if the network
device driver supports promiscuous mode. The user application
also needs to read the promiscuous mode data.
if NET_PROMISCUOUS_MODE
module = NET_PROMISC
module-dep = NET_LOG
module-str = Log level for promiscuous mode
module-help = Enables promiscuous mode to output debug messages.
source "subsys/net/Kconfig.template.log_config.net"
endif # NET_PROMISCUOUS_MODE
config NET_DISABLE_ICMP_DESTINATION_UNREACHABLE
bool "Disable destination unreachable ICMP errors"
help
Suppress the generation of ICMP destination unreachable errors
when ports that are not in a listening state receive packets.
source "subsys/net/ip/Kconfig.stack"
source "subsys/net/ip/Kconfig.mgmt"
source "subsys/net/ip/Kconfig.stats"
source "subsys/net/ip/Kconfig.debug"
endmenu