tools: add mosquitto.rsmb MQTT-SN broker

dist/tools/mosquitto_rsmb/.gitignore

+mosquitto_rsmb
+Messages.1.*
+FFDC.CWNAN.*.dmp

dist/tools/mosquitto_rsmb/Makefile

+PKG_NAME     = mosquitto_rsmb
+PKG_URL      = https://github.com/eclipse/mosquitto.rsmb
+PKG_VERSION  = 9b99a3be9a26635b93aec8fa2ed744e8c49e7262
+PKG_LICENSE  = EPL-1.0
+PKG_BUILDDIR = $(CURDIR)/bin
+
+# set default configuration file
+RSMB_CFG ?= $(CURDIR)/config.cnf
+
+# manually set some RIOT env vars, so this Makefile can be called stand-alone
+RIOTBASE ?= $(CURDIR)/../../..
+RIOTTOOLS ?= $(CURDIR)/..
+GITCACHE ?= $(RIOTTOOLS)/git/git-cache
+
+$(info $(RIOTBASE))
+
+.PHONY: all clean
+
+all: git-download
+# Start mosquitto_rsmb build in a clean environment, so variables set by RIOT's
+# build process for cross compiling a specific target platform are reset and
+# mosquitto_rsmb can be built cleanly for the host platform.
+	env -i PATH=$(PATH) TERM=$(TERM) "$(MAKE)" -C $(PKG_BUILDDIR)/rsmb/src
+	cp $(PKG_BUILDDIR)/rsmb/src/broker_mqtts $(CURDIR)/mosquitto_rsmb
+	cp $(PKG_BUILDDIR)/rsmb/src/Messages.1.* $(CURDIR)/
+
+run:
+	@$(CURDIR)/mosquitto_rsmb $(RSMB_CFG)
+
+clean::
+	@rm -rf $(CURDIR)/bin
+	@rm -f $(CURDIR)/mosquitto_rsmb
+	@rm -f $(CURDIR)/Messages.1.*
+	@rm -f $(CURDIR)/FFDC.CWNAN.*.dmp
+
+include $(RIOTBASE)/pkg/pkg.mk

dist/tools/mosquitto_rsmb/config.cnf

+# Uncomment this to show you packets being sent and received
+trace_output protocol
+
+# MQTT-SN listener
+listener 1883 INADDR_ANY mqtts
+ipv6 true

makefiles/tools/targets.inc.mk

@@ -4,6 +4,8 @@
 # (as `all`), so `all` will always be the first target defined and thereby the
 # default target when `make` is called without any further argument.
 
+.PHONY: mosquitto_rsmb
+
 # target for building the bossac binary
 $(RIOTTOOLS)/bossa/bossac:
 	@echo "[INFO] bossac binary not found - building it from source"
@@ -14,3 +16,11 @@ $(RIOTTOOLS)/edbg/edbg:
 	@echo "[INFO] edbg binary not found - building it from source now"
 	CC= CFLAGS= make -C $(RIOTTOOLS)/edbg
 	@echo "[INFO] edbg binary successfully build!"
+
+$(RIOTTOOLS)/mosquitto_rsmb/mosquitto_rsmb:
+	@echo "[INFO] rsmb binary not found - building it from source now"
+	@make -C $(RIOTTOOLS)/mosquitto_rsmb
+	@echo "[INFO] rsmb binary successfully build!"
+
+mosquitto_rsmb: $(RIOTTOOLS)/mosquitto_rsmb/mosquitto_rsmb
+	@make -C $(RIOTTOOLS)/mosquitto_rsmb run