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# dtls_echo
This example shows you how to use TinyDTLS with the non-socket approach.
This code is based on ../gnrc_networking and ../gnrc_tftp.
Is a good idea to read their README.md's for any doubt of how making the
testings.
## SOCKET vs. Non-socket (GNRC)
This example is configured to use the GNRC instead of sockets (over GNRC).
At the moment, the configuration must be done manually in the Makefile of
this project.
## Fast configuration (Between RIOT instances):
Preparing the logical interfaces:
./../../dist/tools/tapsetup/tapsetup --create 2
For the server instance:
make all; PORT=tap1 make term
dtlss start
ifconfig
Do not forget to copy the IPv6 addresses!
For the client:
PORT=tap0 make term
dtlsc <IPv6's server address> "DATA TO DATA TO DATA!"
# Testings
## Boards
Those boards that do not support the `../gnrc_networking` example are included
in the `BOARD_INSUFFICIENT_MEMORY`, plus the board `cc2650stk`.
There are certain boards that are having issues with `crypto.c` and
`dtls_time.h` Which for now are in the the `BOARD_BLACKLIST`.
The boards that requires `periph_conf.h` are not tested.
Boards with problem type 1 (`crypto.c`):
z1
wsn430-v1_4
wsn430-v1_3b
waspmote-pro
msb-430h
msb-430
chronos
arduino-mega2560
Boards with problem type 2 (`dtls_time.h`):
cc2538dk
msbiot
telosb
Boards with problem type 3 (Redifinition):
saml21-xpro
samr21-xpro
arduino-uno
arduino-duemilanove
NOTE: Those on type 1 can be benefit of the following PR:
https://github.com/RIOT-OS/RIOT/issues/2360
However, there are still issues to fix.
NOTE: Those on type 2 can be fixed with the patch at
https://github.com/RIOT-OS/RIOT/pull/5974
## FIT-LAB
The code has been tested in the FIT-LAB with M3 motes.
However, erros can occurrs. Enabling the line `CFLAGS += -DNDEBUG` in
the `Makefile` reduces the risk.
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