（一）编译安装 mosquitto
1）下载 mosquitto 项目
$ git clone git@github.com:eclipse/mosquitto.git
2）导入 CLion 进行编译
-
2.1）【Reload CMake Project】
或者
【出现如下问题】
（问题1）：找不到 openssl
CMake Error at /usr/share/cmake-3.7/Modules/FindPackageHandleStandardArgs.cmake:138 (message):
Could NOT find OpenSSL, try to set the path to OpenSSL root folder in the
system variable OPENSSL_ROOT_DIR (missing: OPENSSL_LIBRARIES
OPENSSL_INCLUDE_DIR)
解决方法: 安装 openssl
sudo apt-get install libssl-dev
（问题 2）：xsltproc not found
CMake Error at man/CMakeLists.txt:29 (message):
xsltproc not found: manpages cannot be built
解决方法，安装 xsltproc：
sudo apt install xsltproc
- 2.2）编译并运行
mosquitto
控制台输出：
/tmp/tmp.rcJYQzXv2I/cmake-build-debug/src/mosquitto
1625147367: mosquitto version 2.0.11 starting
1625147367: Using default config.
1625147367: Starting in local only mode. Connections will only be possible from clients running on this machine.
1625147367: Create a configuration file which defines a listener to allow remote access.
1625147367: For more details see https://mosquitto.org/documentation/authentication-methods/
1625147367: Opening ipv4 listen socket on port 1883.
1625147367: Opening ipv6 listen socket on port 1883.
1625147367: Error: Cannot assign requested address
1625147367: mosquitto version 2.0.11 running
- 2.3）编译并运行
mosquitto_sub
控制台输出：
/tmp/tmp.rcJYQzXv2I/cmake-build-debug/client/mosquitto_sub
Error: You must specify a topic to subscribe to.
Use 'mosquitto_sub --help' to see usage.
- 2.4）编译并运行
mosquitto_pub
控制台输出：
/tmp/tmp.rcJYQzXv2I/cmake-build-debug/client/mosquitto_pub
Error: Both topic and message must be supplied.
mosquitto_pub is a simple mqtt client that will publish a message on a single topic and exit.
mosquitto_pub version 2.0.11 running on libmosquitto 2.0.11.
Usage: mosquitto_pub {[-h host] [--unix path] [-p port] [-u username] [-P password] -t topic | -L URL}
... # 省略
（二）测试 mosquitto
1）启动 mosquitto 进程
$ /tmp/tmp.rcJYQzXv2I/cmake-build-debug/src/mosquitto
1625147433: mosquitto version 2.0.11 starting
1625147433: Using default config.
1625147433: Starting in local only mode. Connections will only be possible from clients running on this machine.
1625147433: Create a configuration file which defines a listener to allow remote access.
1625147433: For more details see https://mosquitto.org/documentation/authentication-methods/
1625147433: Opening ipv4 listen socket on port 1883.
1625147433: Opening ipv6 listen socket on port 1883.
1625147433: Error: Cannot assign requested address
1625147433: mosquitto version 2.0.11 running
2）通过 mosquitto_sub 命令订阅 test 主题
$ /tmp/tmp.rcJYQzXv2I/cmake-build-debug/client/mosquitto_sub -t test
3）通过 mosquitto_pub 命令给 test 主题发送 abc 消息
$ /tmp/tmp.rcJYQzXv2I/cmake-build-debug/client/mosquitto_pub -t test -m abc
5）mosquitto_sub 进程收到 mosquitto_pub 命令发送到 test 主题的消息
（三）编译 mosquitto-auth-plug
1）下载 mosquitto-auth-plug 项目
$ git clone git@github.com:jpmens/mosquitto-auth-plug.git
2）导入 CLion 进行编译
- 2.1）
config.mk.in重命名为config.mk
# 下载 `mosquitto v1.5.11` 的源码
$ wget --no-check-certificate https://github.com/eclipse/mosquitto/archive/refs/tags/v1.5.11.zip
# 解压 /v1.5.11.zip 压缩文件
$ unzip /v1.5.11.zip
# 查看 mosquitto-1.4.12 解压路径
$ cd mosquitto-1.5.11/
$ pwd
/home/meikai/mosquitto-1.5.11
- 2.2）修改 ``config.mk` 文件，修改后的内容如下所示：
# Select your backends from this list
BACKEND_CDB ?= no
BACKEND_MYSQL ?= no
BACKEND_SQLITE ?= no
BACKEND_REDIS ?= yes
BACKEND_POSTGRES ?= no
BACKEND_LDAP ?= no
BACKEND_HTTP ?= no
BACKEND_JWT ?= no
BACKEND_MONGO ?= no
BACKEND_FILES ?= no
BACKEND_MEMCACHED ?= no
# Specify the path to the Mosquitto sources here
# MOSQUITTO_SRC = /usr/local/Cellar/mosquitto/1.4.12
MOSQUITTO_SRC = /home/meikai/mosquitto-1.5.11
# Specify the path the OpenSSL here
OPENSSLDIR = /usr
# Add support for django hashers algorithm name
SUPPORT_DJANGO_HASHERS ?= no
# Specify optional/additional linker/compiler flags here
# On macOS, add
# CFG_LDFLAGS = -undefined dynamic_lookup
# as described in https://github.com/eclipse/mosquitto/issues/244
#
# CFG_LDFLAGS = -undefined dynamic_lookup -L/usr/local/Cellar/openssl/1.0.2l/lib
# CFG_CFLAGS = -I/usr/local/Cellar/openssl/1.0.2l/include -I/usr/local/Cellar/mosquitto/1.4.12/include
CFG_LDFLAGS =
CFG_CFLAGS =
以上配置基本上都是默认配置，仅修改如下三项：
# 取消 mysql 后端的配置
BACKEND_MYSQL ?= no
# 配置为 redis 后端
BACKEND_REDIS ?= yes
# 配置为 mosquitto-1.5.11 的路径
MOSQUITTO_SRC = /home/meikai/mosquitto-1.5.11
-
3）【Build Project】
【构建错误修复】
（问题1）缺少 hiredis 包
be-redis.c:38:29: fatal error: hiredis/hiredis.h: No such file or directory
#include <hiredis/hiredis.h>
解决方法，安装 libhiredis-dev：
sudo apt install libhiredis-dev
（问题2）ld 找不到要链接的 libmosquitto
/usr/bin/ld: cannot find -lmosquitto
collect2: error: ld returned 1 exit status
Makefile:160: recipe for target 'auth-plug.so' failed
make: *** [auth-plug.so] Error 1
解决方法，安装 libmosquitto-dev
$ sudo apt install libmosquitto-dev
查看安装的 libmosquitto.so
# 查看 ld 的搜索路径
$ ld --verbose | grep SEARCH
SEARCH_DIR("=/usr/local/lib/x86_64-linux-gnu"); SEARCH_DIR("=/lib/x86_64-linux-gnu"); SEARCH_DIR("=/usr/lib/x86_64-linux-gnu"); SEARCH_DIR("=/usr/local/lib64"); SEARCH_DIR("=/lib64"); SEARCH_DIR("=/usr/lib64"); SEARCH_DIR("=/usr/local/lib"); SEARCH_DIR("=/lib"); SEARCH_DIR("=/usr/lib"); SEARCH_DIR("=/usr/x86_64-linux-gnu/lib64"); SEARCH_DIR("=/usr/x86_64-linux-gnu/lib");
# 在 /usr/lib/x86_64-linux-gnu 中可以找到 libmosquitto.so
$ cd /usr/lib/x86_64-linux-gnu
$ ls -al | grep mosquitto
lrwxrwxrwx 1 root root 17 Feb 13 2019 libmosquitto.so -> libmosquitto.so.1
-rw-r--r-- 1 root root 64504 Feb 13 2019 libmosquitto.so.1
至此，编译成功：
====================[ Build | all ]=============================================
make --jobs=3 all
cc -I/home/meikai/mosquitto-1.5.11/src/ -I/home/meikai/mosquitto-1.5.11/lib/ -fPIC -Wall -Werror -DBE_REDIS -I/usr/local/include/hiredis -I/src -DDEBUG=1 -I/usr/include -L/usr/local/lib -L/home/meikai/mosquitto-1.5.11/lib/ -fPIC -shared -o auth-plug.so auth-plug.o base64.o pbkdf2-check.o log.o envs.o hash.o be-psk.o backends.o cache.o be-redis.o -lhiredis -L/usr/lib -lcrypto -lmosquitto
Selected backends: Redis
Using mosquitto source dir: /home/meikai/mosquitto-1.5.11
OpenSSL install dir: /usr
If you changed the backend selection, you might need to 'make clean' first
CFLAGS: -I/home/meikai/mosquitto-1.5.11/src/ -I/home/meikai/mosquitto-1.5.11/lib/ -fPIC -Wall -Werror -DBE_REDIS -I/usr/local/include/hiredis -I/src -DDEBUG=1 -I/usr/include
LDFLAGS: -L/usr/local/lib -L/home/meikai/mosquitto-1.5.11/lib/
LDADD: -lhiredis -L/usr/lib -lcrypto -lmosquitto
Process finished with exit code 0
4）查看编译后的 auth-plug.so 文件
$ cd /tmp/tmp.dHVBlwblW0/
$ ls -al | grep so
-rwxr-xr-x 1 meikai meikai 61584 Jul 1 22:36 auth-plug.so
参考
- https://github.com/eclipse/mosquitto
- https://github.com/jpmens/mosquitto-auth-plug
- 安装MQTT服务器Mosquitto 遇到的问题
- mosquitto_sub、mosquitto_pub命令参数解析
- MQTT学习笔记——MQTT协议体验 Mosquitto安装和使用
- mosquitto-auth-plug 和 mosquitto 版本兼容问题说明
- https://stackoverflow.com/questions/51530651/building-mosquitto-mqtt-auth-plugin-issue
- 查看ld搜索路径
