pkg/tinydtls: Moving to official repository

The integration of TinyDTLS for RIOT has been merged into the
development branch of the official repository.

It will be officially available on the master branch in the next
release of tinyDTLS.

Other minor updates:
- Support for the RIOT's memarray
- tinydtls/sha2 is removed from the compilation for giving priority
to RIOT's sha2 functions.

pkg/tinydtls/Makefile

 PKG_NAME=tinydtls
-PKG_URL=https://github.com/rfuentess/TinyDTLS.git
-# PKG_VERSION=RIOT-OS
-PKG_VERSION=eb6f017ab451bb6cc4428b3e449955a76aeeba19
+PKG_URL=https://git.eclipse.org/r/tinydtls/org.eclipse.tinydtls
+PKG_VERSION=84f1f4e3ca13101a5a9aedeaf08039636c4f34dd
 PKG_LICENSE=EPL-1.0,EDL-1.0
 
 CFLAGS += -Wno-implicit-fallthrough
@@ -15,7 +14,6 @@ all: git-download
 	@cp $(PKG_BUILDDIR)/Makefile.riot $(PKG_BUILDDIR)/Makefile
 	@cp $(PKG_BUILDDIR)/aes/Makefile.riot $(PKG_BUILDDIR)/aes/Makefile
 	@cp $(PKG_BUILDDIR)/ecc/Makefile.riot $(PKG_BUILDDIR)/ecc/Makefile
-	@cp $(PKG_BUILDDIR)/sha2/Makefile.riot $(PKG_BUILDDIR)/sha2/Makefile
 	"$(MAKE)" -C $(PKG_BUILDDIR)
 
 include $(RIOTBASE)/pkg/pkg.mk

pkg/tinydtls/Makefile.dep

 ifneq (,$(filter tinydtls,$(USEPKG)))
   USEMODULE += tinydtls
+
+  # Mandatory for tinyDTLS
+  CFLAGS += -DDTLSv12 -DWITH_SHA256
+
+  # Dependencies partially under control of the App's requirements
+
+  # The configuration for socket overrides Sock
+  ifeq (,$(filter WITH_RIOT_SOCKETS,$(CFLAGS)))
+    CFLAGS += -DWITH_RIOT_GNRC
+  endif
+
+  # NOTE: PSK should be enabled by default BUT if the user define any other cipher
+  #       suite(s) it should not be enabled.
+  # TODO: Create the flag DTLS_CIPHERS with keywords PSK, ECC (and future)
+  ifeq (,$(filter -DDTLS_PSK,$(CFLAGS)))
+    ifeq (,$(filter -DDTLS_ECC,$(CFLAGS)))
+      CFLAGS += -DDTLS_PSK
+    endif
+  endif
+
+  # Handles the verbosity of tinyDTLS. Default: Minimum or just error messages.
+  ifeq (,$(filter -DTINYDTLS_DEBUG,$(CFLAGS)))
+    ifeq ( , $(TINYDTLS_LOG))
+      CFLAGS += -DTINYDTLS_LOG_LVL=0
+    else
+      CFLAGS += -DTINYDTLS_LOG_LVL=$(TINYDTLS_LOG)
+    endif
+  else
+    CFLAGS += -DTINYDTLS_LOG_LVL=6
+  endif
+
 endif
 
 ifneq (,$(filter tinydtls,$(USEMODULE)))
+  USEMODULE += memarray
+  USEMODULE += hashes
   USEMODULE += tinydtls_aes
   USEMODULE += tinydtls_ecc
-  USEMODULE += tinydtls_sha2
 endif

pkg/tinydtls/Makefile.include

@@ -13,7 +13,3 @@ endif
 ifneq (,$(filter tinydtls_ecc,$(USEMODULE)))
   DIRS += $(PKG_BUILDDIR)/ecc
 endif
-
-ifneq (,$(filter tinydtls_sha2,$(USEMODULE)))
-  DIRS += $(PKG_BUILDDIR)/sha2
-endif