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LIBRARIES
WHAT'S NEW
Simplifying Authenticated Cloud Connectivity for Any Device.
Designing an energy efficient and cloud-connected IoT solution with CoAP.
Introducing FreeRTOS Kernel version 11.0.0:
FreeRTOS Roadmap and Code Contribution process.
OPC-UA over TSN with FreeRTOS.
FreeRTOS-Plus-TCP v4.0.0 adds IPv6, multiple network interfaces and endpoints, along with improving the robustness, security, and modularity of the FreeRTOS-Plus-TCP library. Learn more here.

FreeRTOS-Plus-TCP
Open source and thread safe TCP/IP stack for FreeRTOS

FreeRTOS-Plus-TCP is a scalable, open source and thread safe TCP/IP stack for FreeRTOS.

FreeRTOS-Plus-TCP provides a familiar and standards based Berkeley sockets interface, making it as simple to use and as quick to learn as possible. An alternative callback interface is also available for advanced users.

FreeRTOS-Plus-TCP's features and RAM footprint are fully scalable, making FreeRTOS-Plus-TCP equally applicable to smaller lower throughput microcontrollers as larger higher throughput microprocessors.

See the FreeRTOS-Plus-TCP section in the tree menu (on the left) for a FreeRTOS-Plus-TCP networking tutorial, porting guide, API documentation, and a link to the free TCP/IP source code download.

RTOS, TCP, FAT
Filezilla FTP'ing large and small files to a
66MHz MCU running FreeRTOS-Plus-TCP and FreeRTOS-Plus-FAT


Features
Berkeley sockets API
Supports IPv4, IPv6, multiple network interfaces, multiple network endpoints
Optionally supports TCP sliding windows
Fully re-entrant and thread safe API
Includes ARP, DHCP, DNS, LLMNR, NBNS, RA, ND, ICMP, and ICMPv6
Gratuitous ARPs
Static, DHCP, DHCPv6, RA and Auto-IP address assignment
Can also be used as a UDP only stack
Optionally callback interface
Optionally fragment outgoing packets
Berkeley Sockets API
FreeRTOS_socket()
FreeRTOS_setsockopt()
FreeRTOS_bind()
FreeRTOS_listen()
FreeRTOS_connect()
FreeRTOS_accept()
FreeRTOS_send() / FreeRTOS_sendto()
FreeRTOS_recv() / FreeRTOS_recvfrom()
etc.


FreeRTOS-Plus-TCP Supports the following build combinations, (by default IPv4, IPv6 and TCP are enabled):

Build combination ipconfigUSE_IPv4 ipconfigUSE_IPv6 ipconfigUSE_TCP
IPv4 + UDP100
IPv4 + UDP + TCP101
IPv6 + UDP010
IPv6 + UDP + TCP011
IPv4 + IPv6 + UDP110
IPv4 + IPv6 + UDP + TCP111


Code Size (example generated with GCC for ARM Cortex-M) with IPv4 & IPv6 Enabled
GCC ARM -01 [-mcpu=cortex-m4 -std=gnu11] GCC ARM -0s [-mcpu=cortex-m4 -std=gnu11]
File Size (bytes) File Size (bytes)
FreeRTOS_ARP.c2400FreeRTOS_ARP.c2094
FreeRTOS_BitConfig.c452FreeRTOS_BitConfig.c400
FreeRTOS_DHCP.c2689FreeRTOS_DHCP.c2359
FreeRTOS_DHCPv6.c2934FreeRTOS_DHCPv6.c2676
FreeRTOS_DNS.c1463FreeRTOS_DNS.c1309
FreeRTOS_DNS_Cache.c980FreeRTOS_DNS_Cache.c860
FreeRTOS_DNS_Callback.c408FreeRTOS_DNS_Callback.c396
FreeRTOS_DNS_Networking.c188FreeRTOS_DNS_Networking.c178
FreeRTOS_DNS_Parser.c910FreeRTOS_DNS_Parser.c782
FreeRTOS_ICMP.c80FreeRTOS_ICMP.c78
FreeRTOS_IP.c2584FreeRTOS_IP.c2366
FreeRTOS_IP_Timers.c756FreeRTOS_IP_Timers.c682
FreeRTOS_IP_Utils.c2495FreeRTOS_IP_Utils.c2177
FreeRTOS_IPv4.c296FreeRTOS_IPv4.c208
FreeRTOS_IPv4_Sockets.c292FreeRTOS_IPv4_Sockets.c190
FreeRTOS_IPv4_Utils.c180FreeRTOS_IPv4_Utils.c134
FreeRTOS_IPv6.c790FreeRTOS_IPv6.c644
FreeRTOS_IPv6_Sockets.c885FreeRTOS_IPv6_Sockets.c769
FreeRTOS_IPv6_Utils.c290FreeRTOS_IPv6_Utils.c292
FreeRTOS_ND.c1850FreeRTOS_ND.c1704
FreeRTOS_RA.c1228FreeRTOS_RA.c1022
FreeRTOS_Routing.c1739FreeRTOS_Routing.c1559
FreeRTOS_Sockets.c7272FreeRTOS_Sockets.c6206
FreeRTOS_Stream_Buffer.c498FreeRTOS_Stream_Buffer.c424
FreeRTOS_TCP_IP.c1186FreeRTOS_TCP_IP.c942
FreeRTOS_TCP_IP_IPV4.c608FreeRTOS_TCP_IP_IPV4.c430
FreeRTOS_TCP_IP_IPV6.c614FreeRTOS_TCP_IP_IPV6.c482
FreeRTOS_TCP_Reception.c832FreeRTOS_TCP_Reception.c678
FreeRTOS_TCP_State_Handling.c1690FreeRTOS_TCP_State_Handling.c1464
FreeRTOS_TCP_State_Handling_IPV4.c276FreeRTOS_TCP_State_Handling_IPV4.c224
FreeRTOS_TCP_State_Handling_IPV6.c304FreeRTOS_TCP_State_Handling_IPV6.c256
FreeRTOS_TCP_Transmission.c1866FreeRTOS_TCP_Transmission.c1636
FreeRTOS_TCP_Transmission_IPV4.c788FreeRTOS_TCP_Transmission_IPV4.c658
FreeRTOS_TCP_Transmission_IPV6.c996FreeRTOS_TCP_Transmission_IPV6.c918
FreeRTOS_TCP_Utils.c22FreeRTOS_TCP_Utils.c14
FreeRTOS_TCP_Utils_IPV4.c72FreeRTOS_TCP_Utils_IPV4.c46
FreeRTOS_TCP_Utils_IPV6.c50FreeRTOS_TCP_Utils_IPV6.c48
FreeRTOS_TCP_WIN.c2086FreeRTOS_TCP_WIN.c1768
FreeRTOS_Tiny_TCP.c302FreeRTOS_Tiny_TCP.c290
FreeRTOS_UDP_IP.c116FreeRTOS_UDP_IP.c112
FreeRTOS_UDP_IPv4.c620FreeRTOS_UDP_IPv4.c548
FreeRTOS_UDP_IPv6.c756FreeRTOS_UDP_IPv6.c656
Total46843Total40679

Code Size (example generated with GCC for ARM Cortex-M) with only IPv4 Enabled
GCC ARM -01 [-mcpu=cortex-m4 -std=gnu11] GCC ARM -0s [-mcpu=cortex-m4 -std=gnu11]
File Size (bytes) File Size (bytes)
FreeRTOS_ARP.c2282FreeRTOS_ARP.c1990
FreeRTOS_BitConfig.c452FreeRTOS_BitConfig.c400
FreeRTOS_DHCP.c2613FreeRTOS_DHCP.c2293
FreeRTOS_DNS.c1225FreeRTOS_DNS.c1005
FreeRTOS_DNS_Cache.c856FreeRTOS_DNS_Cache.c734
FreeRTOS_DNS_Callback.c408FreeRTOS_DNS_Callback.c396
FreeRTOS_DNS_Networking.c188FreeRTOS_DNS_Networking.c178
FreeRTOS_DNS_Parser.c910FreeRTOS_DNS_Parser.c782
FreeRTOS_ICMP.c80FreeRTOS_ICMP.c78
FreeRTOS_IP.c2316FreeRTOS_IP.c2108
FreeRTOS_IP_Timers.c734FreeRTOS_IP_Timers.c656
FreeRTOS_IP_Utils.c2243FreeRTOS_IP_Utils.c1981
FreeRTOS_IPv4.c296FreeRTOS_IPv4.c208
FreeRTOS_IPv4_Sockets.c292FreeRTOS_IPv4_Sockets.c190
FreeRTOS_IPv4_Utils.c180FreeRTOS_IPv4_Utils.c134
FreeRTOS_Routing.c1183FreeRTOS_Routing.c1019
FreeRTOS_Sockets.c6914FreeRTOS_Sockets.c5856
FreeRTOS_Stream_Buffer.c498FreeRTOS_Stream_Buffer.c424
FreeRTOS_TCP_IP.c1172FreeRTOS_TCP_IP.c930
FreeRTOS_TCP_IP_IPV4.c608FreeRTOS_TCP_IP_IPV4.c430
FreeRTOS_TCP_Reception.c808FreeRTOS_TCP_Reception.c658
FreeRTOS_TCP_State_Handling.c1676FreeRTOS_TCP_State_Handling.c1448
FreeRTOS_TCP_State_Handling_IPV4.c276FreeRTOS_TCP_State_Handling_IPV4.c224
FreeRTOS_TCP_Transmission.c1788FreeRTOS_TCP_Transmission.c1548
FreeRTOS_TCP_Transmission_IPV4.c784FreeRTOS_TCP_Transmission_IPV4.c650
FreeRTOS_TCP_Utils.c18FreeRTOS_TCP_Utils.c12
FreeRTOS_TCP_Utils_IPV4.c72FreeRTOS_TCP_Utils_IPV4.c46
FreeRTOS_TCP_WIN.c2086FreeRTOS_TCP_WIN.c1768
FreeRTOS_Tiny_TCP.c302FreeRTOS_Tiny_TCP.c290
FreeRTOS_UDP_IP.c82FreeRTOS_UDP_IP.c72
FreeRTOS_UDP_IPv4.c616FreeRTOS_UDP_IPv4.c544
Total33958Total29052

Code Size (example generated with GCC for ARM Cortex-M) with only IPv6 Enabled
GCC ARM -01 [-mcpu=cortex-m4 -std=gnu11] GCC ARM -0s [-mcpu=cortex-m4 -std=gnu11]
File Size (bytes) File Size (bytes)
FreeRTOS_ARP.c1294FreeRTOS_ARP.c1090
FreeRTOS_BitConfig.c452FreeRTOS_BitConfig.c400
FreeRTOS_DHCPv6.c2934FreeRTOS_DHCPv6.c2676
FreeRTOS_ICMP.c80FreeRTOS_ICMP.c78
FreeRTOS_IP.c2274FreeRTOS_IP.c2082
FreeRTOS_IP_Timers.c648FreeRTOS_IP_Timers.c590
FreeRTOS_IP_Utils.c2411FreeRTOS_IP_Utils.c2095
FreeRTOS_IPv6.c790FreeRTOS_IPv6.c644
FreeRTOS_IPv6_Sockets.c885FreeRTOS_IPv6_Sockets.c769
FreeRTOS_IPv6_Utils.c290FreeRTOS_IPv6_Utils.c292
FreeRTOS_ND.c1850FreeRTOS_ND.c1704
FreeRTOS_RA.c1228FreeRTOS_RA.c1022
FreeRTOS_Routing.c1357FreeRTOS_Routing.c1269
FreeRTOS_Sockets.c6910FreeRTOS_Sockets.c5982
FreeRTOS_Stream_Buffer.c498FreeRTOS_Stream_Buffer.c424
FreeRTOS_TCP_IP.c1176FreeRTOS_TCP_IP.c934
FreeRTOS_TCP_IP_IPV6.c614FreeRTOS_TCP_IP_IPV6.c482
FreeRTOS_TCP_Reception.c818FreeRTOS_TCP_Reception.c666
FreeRTOS_TCP_State_Handling.c1676FreeRTOS_TCP_State_Handling.c1448
FreeRTOS_TCP_State_Handling_IPV6.c304FreeRTOS_TCP_State_Handling_IPV6.c256
FreeRTOS_TCP_Transmission.c1814FreeRTOS_TCP_Transmission.c1588
FreeRTOS_TCP_Transmission_IPV6.c996FreeRTOS_TCP_Transmission_IPV6.c918
FreeRTOS_TCP_Utils.c18FreeRTOS_TCP_Utils.c12
FreeRTOS_TCP_Utils_IPV6.c50FreeRTOS_TCP_Utils_IPV6.c48
FreeRTOS_TCP_WIN.c2086FreeRTOS_TCP_WIN.c1768
FreeRTOS_Tiny_TCP.c302FreeRTOS_Tiny_TCP.c290
FreeRTOS_UDP_IP.c94FreeRTOS_UDP_IP.c90
FreeRTOS_UDP_IPv6.c720FreeRTOS_UDP_IPv6.c616
Total34569Total30233


Compiler: arm-none-eabi-gcc (GNU Tools for STM32) 10.3.1
Version used for object size calculation: bb654636

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