adding wamo plugin
This commit is contained in:
parent
15292b20b0
commit
323a37331c
57
CMakeSettings.json
Normal file
57
CMakeSettings.json
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@ -0,0 +1,57 @@
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{
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"configurations": [
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{
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"name": "x64-Debug",
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"generator": "Ninja",
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"configurationType": "Debug",
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"inheritEnvironments": [ "clang_cl_x64" ],
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"buildRoot": "${projectDir}\\out\\build\\${name}",
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"installRoot": "${projectDir}\\out\\install\\${name}",
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"cmakeCommandArgs": "",
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"buildCommandArgs": "",
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"ctestCommandArgs": "",
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"variables": [
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{
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"name": "WITH_TLS",
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"value": "False",
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"type": "BOOL"
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},
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{
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"name": "WITH_CLIENTS",
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"value": "False",
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"type": "BOOL"
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},
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{
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"name": "WITH_WEBSOCKETS",
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"value": "False",
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"type": "BOOL"
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},
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{
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"name": "WITH_THREADING",
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"value": "False",
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"type": "BOOL"
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},
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{
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"name": "DOCUMENTATION",
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"value": "False",
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"type": "BOOL"
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},
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{
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"name": "CJSON_DIR",
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"value": "C:/Users/d.kuhn/Projekte/cJSON/",
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"type": "STRING"
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},
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{
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"name": "CJSON_INCLUDE_DIR",
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"value": "C:/Users/d.kuhn/Projekte/cJSON/",
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"type": "PATH"
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},
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{
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"name": "CJSON_LIBRARY",
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"value": "C:/Users/d.kuhn/Projekte/cJSON/cjson/out/build/x64-Debug/cjson.lib",
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"type": "FILEPATH"
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}
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]
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}
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]
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}
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@ -67,7 +67,7 @@ WITH_SYSTEMD:=no
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WITH_SRV:=no
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WITH_SRV:=no
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# Build with websockets support on the broker.
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# Build with websockets support on the broker.
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WITH_WEBSOCKETS:=no
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WITH_WEBSOCKETS:=yes
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# Use elliptic keys in broker
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# Use elliptic keys in broker
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WITH_EC:=yes
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WITH_EC:=yes
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@ -902,3 +902,7 @@
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# given multiple times, all of the files from the first instance will be
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# given multiple times, all of the files from the first instance will be
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# processed before the next instance. See the man page for examples.
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# processed before the next instance. See the man page for examples.
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#include_dir
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#include_dir
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# plugin C:\Users\d.kuhn\Projekte\mosquitto\out\build\x64-Debug\plugins\payload-modification\mosquitto_payload_modification.dll
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plugin C:\Users\d.kuhn\Projekte\mosquitto\out\build\x64-Debug\plugins\wamo\wamo.dll
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@ -3,3 +3,4 @@ if(NOT WIN32)
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add_subdirectory(message-timestamp)
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add_subdirectory(message-timestamp)
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endif(NOT WIN32)
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endif(NOT WIN32)
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add_subdirectory(payload-modification)
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add_subdirectory(payload-modification)
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add_subdirectory(wamo)
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51
plugins/wamo/CMakeLists.txt
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51
plugins/wamo/CMakeLists.txt
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# include_directories(${mosquitto_SOURCE_DIR} ${mosquitto_SOURCE_DIR}/include
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# ${OPENSSL_INCLUDE_DIR} ${STDBOOL_H_PATH} ${STDINT_H_PATH})
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# link_directories(${mosquitto_SOURCE_DIR})
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#
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# add_library(wamo MODULE wamo.c "json_help.c" "json_help.h")
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# set_target_properties(wamo PROPERTIES
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# POSITION_INDEPENDENT_CODE 1
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# )
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# set_target_properties(wamo PROPERTIES PREFIX "")
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# if(WIN32)
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# target_link_libraries(wamo mosquitto ${CJSON_LIBRARIES})
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# endif(WIN32)
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# Don't install, these are example plugins only.
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#install(TARGETS wamo RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}" LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}")
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if (CJSON_FOUND )
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add_definitions("-DWITH_CJSON")
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set( CLIENT_INC ${mosquitto_SOURCE_DIR} ${mosquitto_SOURCE_DIR}/include
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${STDBOOL_H_PATH} ${STDINT_H_PATH} ${mosquitto_SOURCE_DIR}/deps
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${mosquitto_SOURCE_DIR}/src ${CJSON_INCLUDE_DIRS} )
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set( CLIENT_DIR ${mosquitto_BINARY_DIR}/lib ${CJSON_DIR})
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include_directories(${CLIENT_INC})
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link_directories(${CLIENT_DIR} ${mosquitto_SOURCE_DIR})
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add_library(wamo MODULE
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json_help.c
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json_help.h
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wamo.c)
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set_target_properties(wamo PROPERTIES
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POSITION_INDEPENDENT_CODE 1
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)
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set_target_properties(wamo PROPERTIES PREFIX "")
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target_link_libraries(wamo ${CJSON_LIBRARIES})
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if(WIN32)
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target_link_libraries(wamo mosquitto)
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install(TARGETS wamo
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DESTINATION "${CMAKE_INSTALL_BINDIR}")
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else()
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install(TARGETS wamo
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RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
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LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}")
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endif()
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endif()
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53
plugins/wamo/Makefile
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53
plugins/wamo/Makefile
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include ../../config.mk
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.PHONY : all binary check clean reallyclean test install uninstall
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PLUGIN_NAME=wamo
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LOCAL_CPPFLAGS=-I../../src/ -DWITH_CJSON
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OBJS= \
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json_help.o \
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wamo.o
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ifeq ($(WITH_CJSON),yes)
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ALL_DEPS:= binary
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else
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ALL_DEPS:=
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endif
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else
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ALL_DEPS:=
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endif
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all : ${ALL_DEPS}
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binary : ${PLUGIN_NAME}.so
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${PLUGIN_NAME}.so : ${OBJS}
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${CROSS_COMPILE}${CC} $(PLUGIN_LDFLAGS) -fPIC -shared $^ -o $@ -lcjson
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json_help.o : json_help.c
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${CROSS_COMPILE}${CC} $(LOCAL_CPPFLAGS) $(PLUGIN_CPPFLAGS) $(PLUGIN_CFLAGS) -c $< -o $@
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wamo.o : wamo.c
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${CROSS_COMPILE}${CC} $(LOCAL_CPPFLAGS) $(PLUGIN_CPPFLAGS) $(PLUGIN_CFLAGS) -c $< -o $@
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reallyclean : clean
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clean:
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-rm -f *.o ${PLUGIN_NAME}.so *.gcda *.gcno
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check: test
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test:
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install: all
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ifeq ($(WITH_CJSON),yes)
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$(INSTALL) -d "${DESTDIR}$(libdir)"
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$(INSTALL) ${STRIP_OPTS} ${PLUGIN_NAME}.so "${DESTDIR}${libdir}/${PLUGIN_NAME}.so"
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endif
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endif
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uninstall :
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-rm -f "${DESTDIR}${libdir}/${PLUGIN_NAME}.so"
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182
plugins/wamo/json_help.c
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182
plugins/wamo/json_help.c
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@ -0,0 +1,182 @@
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/*
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Contributors:
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Dominik Kuhn - initial implementation and documentation.
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*/
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#include "config.h"
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#include <cjson/cJSON.h>
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#include <stdbool.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "json_help.h"
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#include "mosquitto.h"
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#include "mosquitto_broker.h"
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int json_create_array(cJSON* json, const char* name) {
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cJSON* jtmp;
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jtmp = cJSON_GetObjectItem(json, name);
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if (jtmp) {
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if (cJSON_IsArray(jtmp) == true) {
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return MOSQ_ERR_INVAL;
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}
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else {
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cJSON_AddArrayToObject(json, name);
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}
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}
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else {
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cJSON_AddArrayToObject(json, name);
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}
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return MOSQ_ERR_SUCCESS;
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}
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int json_add_id_to_array(cJSON* json, const char* name, const char * id)
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{
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cJSON* jtmp;
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cJSON* tid;
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jtmp = cJSON_GetObjectItem(json, name);
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if (jtmp) {
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if (cJSON_IsArray(jtmp) == true) {
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tid = cJSON_CreateString(id);
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cJSON_AddItemToArray(jtmp, tid);
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}
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else {
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return MOSQ_ERR_INVAL;
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}
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}
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else {
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return MOSQ_ERR_INVAL;
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}
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return MOSQ_ERR_SUCCESS;
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}
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int json_del_id_from_array(cJSON* json, const char* name, const char* id)
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{
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cJSON* jtmp = NULL;
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cJSON* tid = NULL;
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cJSON* detached_item = NULL;
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int array_index = 0;
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jtmp = cJSON_GetObjectItem(json, name);
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if (jtmp) {
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mosquitto_log_printf(MOSQ_LOG_INFO, "wamo: deleting item from array .. debug 1");
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if (cJSON_IsArray(jtmp) == true) {
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// cJSON_DeleteItemFromObject(json, name);
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mosquitto_log_printf(MOSQ_LOG_INFO, "wamo: deleting item from array .. debug 2");
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cJSON_ArrayForEach(tid, jtmp)
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{
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if ( strcmp( cJSON_GetStringValue(tid),id) == 0)
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{
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mosquitto_log_printf(MOSQ_LOG_INFO, "wamo: deleting item from array .. debug 3");
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detached_item = cJSON_DetachItemFromArray(jtmp, array_index);
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}
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else
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{
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mosquitto_log_printf(MOSQ_LOG_INFO, "wamo: deleting item from array .. debug 4");
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}
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array_index++;
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}
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// cJSON_ReplaceItemInObject(json, name, jtmp);
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// cJSON_AddItemToObject(json, id, jtmp);
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}
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else {
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return MOSQ_ERR_INVAL;
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}
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}
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else {
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return MOSQ_ERR_INVAL;
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}
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return MOSQ_ERR_SUCCESS;
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}
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int json_get_bool(cJSON *json, const char *name, bool *value, bool optional, bool default_value)
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{
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cJSON *jtmp;
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if(optional == true){
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*value = default_value;
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}
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jtmp = cJSON_GetObjectItem(json, name);
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if(jtmp){
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if(cJSON_IsBool(jtmp) == false){
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return MOSQ_ERR_INVAL;
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}
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*value = cJSON_IsTrue(jtmp);
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}else{
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if(optional == false){
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return MOSQ_ERR_INVAL;
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}
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}
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return MOSQ_ERR_SUCCESS;
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}
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int json_get_int(cJSON *json, const char *name, int *value, bool optional, int default_value)
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{
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cJSON *jtmp;
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if(optional == true){
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*value = default_value;
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}
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jtmp = cJSON_GetObjectItem(json, name);
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if(jtmp){
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if(cJSON_IsNumber(jtmp) == false){
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return MOSQ_ERR_INVAL;
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}
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*value = jtmp->valueint;
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}else{
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if(optional == false){
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return MOSQ_ERR_INVAL;
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}
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}
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return MOSQ_ERR_SUCCESS;
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}
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int json_get_string(cJSON *json, const char *name, char **value, bool optional)
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{
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cJSON *jtmp;
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*value = NULL;
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jtmp = cJSON_GetObjectItem(json, name);
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if(jtmp){
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if(cJSON_IsString(jtmp) == false){
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return MOSQ_ERR_INVAL;
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}
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*value = jtmp->valuestring;
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}else{
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if(optional == false){
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return MOSQ_ERR_INVAL;
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}
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}
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return MOSQ_ERR_SUCCESS;
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}
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cJSON *cJSON_AddIntToObject(cJSON * const object, const char * const name, int number)
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{
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char buf[30];
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snprintf(buf, sizeof(buf), "%d", number);
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return cJSON_AddRawToObject(object, name, buf);
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}
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23
plugins/wamo/json_help.h
Normal file
23
plugins/wamo/json_help.h
Normal file
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#ifndef JSON_HELP_H
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#define JSON_HELP_H
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/*
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Contributors:
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Dominik Kuhn Light - initial implementation and documentation.
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*/
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#include <cjson/cJSON.h>
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#include <stdbool.h>
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int json_create_array(cJSON* json, const char* name);
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int json_add_id_to_array(cJSON* json, const char* name, const char* id);
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int json_del_id_from_array(cJSON* json, const char* name, const char* id);
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/* "optional==false" can also be taken to mean "only return success if the key exists and is valid" */
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int json_get_bool(cJSON *json, const char *name, bool *value, bool optional, bool default_value);
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int json_get_int(cJSON *json, const char *name, int *value, bool optional, int default_value);
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int json_get_string(cJSON *json, const char *name, char **value, bool optional);
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cJSON *cJSON_AddIntToObject(cJSON * const object, const char * const name, int number);
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cJSON *cJSON_CreateInt(int num);
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#endif
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167
plugins/wamo/wamo.c
Normal file
167
plugins/wamo/wamo.c
Normal file
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/*
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Copyright (c) 2020 Roger Light <roger@atchoo.org>
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All rights reserved. This program and the accompanying materials
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are made available under the terms of the Eclipse Public License 2.0
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and Eclipse Distribution License v1.0 which accompany this distribution.
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The Eclipse Public License is available at
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https://www.eclipse.org/legal/epl-2.0/
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and the Eclipse Distribution License is available at
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http://www.eclipse.org/org/documents/edl-v10.php.
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SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
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Contributors:
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Roger Light - initial implementation and documentation.
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*/
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/*
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* This is an *example* plugin which demonstrates how to modify the payload of
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* a message after it is received by the broker and before it is sent on to
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* other clients.
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*
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* You should be very sure of what you are doing before making use of this feature.
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*
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* Compile with:
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* gcc -I<path to mosquitto-repo/include> -fPIC -shared mosquitto_payload_modification.c -o mosquitto_payload_modification.so
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*
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* Use in config with:
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*
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* plugin /path/to/mosquitto_payload_modification.so
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*
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* Note that this only works on Mosquitto 2.0 or later.
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*/
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#include <stdio.h>
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#include <string.h>
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#include "mosquitto_broker.h"
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#include "mosquitto_plugin.h"
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#include "mosquitto.h"
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#include "mqtt_protocol.h"
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#include "json_help.h"
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#define UNUSED(A) (void)(A)
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static mosquitto_plugin_id_t* mosq_pid = NULL;
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static cJSON* subscribedTopics = NULL;
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static int callback_control(int event, void* event_data, void* userdata)
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{
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struct mosquitto_evt_acl_check* ed = event_data;
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UNUSED(event);
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UNUSED(userdata);
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const char * client_id = mosquitto_client_id(ed->client);
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const char* topic = ed->topic;
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const int access = ed->access;
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||||||
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||||||
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||||||
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if (access == MOSQ_ACL_SUBSCRIBE) {
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json_create_array(subscribedTopics, topic);
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json_add_id_to_array(subscribedTopics, topic, client_id);
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char* json_string = cJSON_Print(subscribedTopics);
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mosquitto_log_printf(MOSQ_LOG_INFO, "wamo: client with id %s subscribed to topic %s", client_id, topic);
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mosquitto_log_printf(MOSQ_LOG_INFO, "wamo: subscribed topics %s", json_string);
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}
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else if (access == MOSQ_ACL_UNSUBSCRIBE) {
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json_del_id_from_array(subscribedTopics, topic, client_id);
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char* json_string = cJSON_Print(subscribedTopics);
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mosquitto_log_printf(MOSQ_LOG_INFO, "wamo: client with id %s unscribed to topic %s", client_id, topic);
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mosquitto_log_printf(MOSQ_LOG_INFO, "wamo: subscribed topics %s", json_string);
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||||||
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}
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||||||
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||||||
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||||||
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||||||
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return MOSQ_ERR_SUCCESS;
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||||||
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}
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||||||
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||||||
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|
||||||
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static int callback_message(int event, void* event_data, void* userdata)
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||||||
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{
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struct mosquitto_evt_message* ed = event_data;
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||||||
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char* new_payload;
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uint32_t new_payloadlen;
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||||||
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||||||
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UNUSED(event);
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||||||
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UNUSED(userdata);
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||||||
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|
||||||
|
/* This simply adds "hello " to the front of every payload. You can of
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* course do much more complicated message processing if needed. */
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/* Calculate the length of our new payload */
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new_payloadlen = ed->payloadlen + (uint32_t)strlen("hello ") + 1;
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/* Allocate some memory - use
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* mosquitto_calloc/mosquitto_malloc/mosquitto_strdup when allocating, to
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* allow the broker to track memory usage */
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new_payload = mosquitto_calloc(1, new_payloadlen);
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if (new_payload == NULL) {
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return MOSQ_ERR_NOMEM;
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}
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/* Print "hello " to the payload */
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snprintf(new_payload, new_payloadlen, "hello ");
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memcpy(new_payload + (uint32_t)strlen("hello "), ed->payload, ed->payloadlen);
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||||||
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||||||
|
/* Assign the new payload and payloadlen to the event data structure. You
|
||||||
|
* must *not* free the original payload, it will be handled by the
|
||||||
|
* broker. */
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ed->payload = new_payload;
|
||||||
|
ed->payloadlen = new_payloadlen;
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||||||
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||||||
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return MOSQ_ERR_SUCCESS;
|
||||||
|
}
|
||||||
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|
||||||
|
int mosquitto_plugin_version(int supported_version_count, const int* supported_versions)
|
||||||
|
{
|
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|
int i;
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||||||
|
for (i = 0; i < supported_version_count; i++) {
|
||||||
|
if (supported_versions[i] == 5) {
|
||||||
|
return 5;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
int mosquitto_plugin_init(mosquitto_plugin_id_t* identifier, void** user_data, struct mosquitto_opt* opts, int opt_count)
|
||||||
|
{
|
||||||
|
int rc;
|
||||||
|
|
||||||
|
UNUSED(user_data);
|
||||||
|
|
||||||
|
mosq_pid = identifier;
|
||||||
|
|
||||||
|
subscribedTopics = cJSON_CreateObject();
|
||||||
|
|
||||||
|
rc = mosquitto_callback_register(mosq_pid, MOSQ_EVT_ACL_CHECK, callback_control, NULL, NULL);
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||||||
|
if (rc == MOSQ_ERR_ALREADY_EXISTS) {
|
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|
mosquitto_log_printf(MOSQ_LOG_ERR, "Error: WaMo plugin can currently only be loaded once.");
|
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|
mosquitto_log_printf(MOSQ_LOG_ERR, "Note that this was previously incorrectly allowed but could cause problems with duplicate entries in the config.");
|
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|
return rc;
|
||||||
|
}
|
||||||
|
else if (rc == MOSQ_ERR_NOMEM) {
|
||||||
|
mosquitto_log_printf(MOSQ_LOG_ERR, "Error: Out of memory.");
|
||||||
|
return rc;
|
||||||
|
}
|
||||||
|
else if (rc != MOSQ_ERR_SUCCESS) {
|
||||||
|
return rc;
|
||||||
|
}
|
||||||
|
|
||||||
|
return MOSQ_ERR_SUCCESS;
|
||||||
|
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
int mosquitto_plugin_cleanup(void* user_data, struct mosquitto_opt* opts, int opt_count)
|
||||||
|
{
|
||||||
|
UNUSED(user_data);
|
||||||
|
UNUSED(opts);
|
||||||
|
UNUSED(opt_count);
|
||||||
|
|
||||||
|
return mosquitto_callback_unregister(mosq_pid, MOSQ_EVT_ACL_CHECK, callback_control, NULL);
|
||||||
|
}
|
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Reference in New Issue
Block a user