14. examples/posix_sockets¶
This application is a showcase for RIOT’s POSIX socket support. To keep things simple this application has only one-hop support and no routing capabilities.
15. Usage¶
Build, flash and start the application:
export BOARD=your_board make make flash make term
The term make target starts a terminal emulator for your board. It
connects to a default port so you can interact with the shell, usually
that is /dev/ttyUSB0. If your port is named differently, the
PORT=/dev/yourport (not to be confused with the UDP port) variable can
be used to override this.
16. Example output¶
The shell commands come with online help. Call help to see which commands
exist and what they do.
udp send fe80::1 1337 uiaeue 2015-09-22 14:55:30,686 - INFO # > udp send fe80::1 1337 uiaeue 2015-09-22 14:55:30,690 - INFO # Success: send 6 byte to fe80::1:1337
Running the help command on an iotlab-m3:
2015-09-22 14:54:54,442 - INFO # help 2015-09-22 14:54:54,443 - INFO # Command Description 2015-09-22 14:54:54,444 - INFO # --------------------------------------- 2015-09-22 14:54:54,446 - INFO # udp send data over UDP and listen on UDP ports 2015-09-22 14:54:54,447 - INFO # reboot Reboot the node 2015-09-22 14:54:54,449 - INFO # ps Prints information about running threads. 2015-09-22 14:54:54,451 - INFO # mersenne_init initializes the PRNG 2015-09-22 14:54:54,453 - INFO # mersenne_get returns 32 bit of pseudo randomness 2015-09-22 14:54:54,454 - INFO # ifconfig Configure network interfaces 2015-09-22 14:54:54,455 - INFO # txtsnd send raw data 2015-09-22 14:54:54,457 - INFO # ncache manage neighbor cache by hand 2015-09-22 14:54:54,459 - INFO # routers IPv6 default router list
Running the ps command on an iotlab-m3:
2015-09-22 14:54:57,134 - INFO # > ps 2015-09-22 14:54:57,139 - INFO # pid | name | state Q | pri | stack ( used) | location 2015-09-22 14:54:57,143 - INFO # 1 | idle | pending Q | 15 | 256 ( 136) | 0x200001cc 2015-09-22 14:54:57,157 - INFO # 2 | main | pending Q | 7 | 1536 ( 620) | 0x200002cc 2015-09-22 14:54:57,164 - INFO # 3 | 6lo | bl rx _ | 3 | 1024 ( 404) | 0x20003ef8 2015-09-22 14:54:57,169 - INFO # 4 | ipv6 | bl rx _ | 4 | 1024 ( 436) | 0x20001cc0 2015-09-22 14:54:57,172 - INFO # 5 | udp | bl rx _ | 5 | 1024 ( 268) | 0x20004660 2015-09-22 14:54:57,177 - INFO # 6 | at86rfxx | bl rx _ | 3 | 1024 ( 320) | 0x20001888 2015-09-22 14:54:57,183 - INFO # | SUM | | | 5888 ( 2184)
Start a UDP server with udp server start <udp_port>:
2015-09-22 14:55:09,563 - INFO # > udp server start 1337 2015-09-22 14:55:09,564 - INFO # Success: started UDP server on port 1337
Send a UDP package with udp send <dst_addr> <dst_port> <data>:
2015-09-22 14:55:30,686 - INFO # > udp send fe80::3432:4833:46d4:9e06 1337 test 2015-09-22 14:55:30,690 - INFO # Success: send 4 byte to [fe80::3432:4833:46d4:9e06]:1337
You can get the IPv6 address of the destination by using the ifconfig command on the receiver:
2015-09-22 14:58:10,394 - INFO # ifconfig 2015-09-22 14:58:10,397 - INFO # Iface 6 HWaddr: 9e:06 Channel: 26 NID: 0x23 TX-Power: 0dBm State: IDLE CSMA Retries: 4 2015-09-22 14:58:10,399 - INFO # Long HWaddr: 36:32:48:33:46:d4:9e:06 2015-09-22 14:58:10,400 - INFO # AUTOACK CSMA MTU:1280 6LO IPHC 2015-09-22 14:58:10,402 - INFO # Source address length: 8 2015-09-22 14:58:10,404 - INFO # Link type: wireless 2015-09-22 14:58:10,407 - INFO # inet6 addr: ff02::1/128 scope: local [multicast] 2015-09-22 14:58:10,415 - INFO # inet6 addr: fe80::3432:4833:46d4:9e06/64 scope: local 2015-09-22 14:58:10,416 - INFO #