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Mosquitto是一个流行的MQTT消息代理,它支持扩展插件,可以通过这些插件来实现自定义的功能
- 安装Mosquitto插件开发工具:
sudo apt-get install libmosquitto-dev
- 创建一个新的插件项目:
mkdir my_plugin cd my_plugin touch my_plugin.c Makefile
- 编写插件代码(my_plugin.c):
#include<stdio.h> #include <mosquitto_plugin.h> #include <mosquitto.h> int mosquitto_plugin_version(int supported_version_count, const int *supported_versions) { int i; for (i = 0; i< supported_version_count; i++) { if (supported_versions[i] == 4) { return 4; } } return -1; } int mosquitto_plugin_init(mosquitto_plugin_id_t *identifier, void **user_data, struct mosquitto_opt *opts, int opt_count) { printf("Plugin initialized.\n"); return MOSQ_ERR_SUCCESS; } int mosquitto_plugin_cleanup(void *user_data, struct mosquitto_opt *opts, int opt_count) { printf("Plugin cleaned up.\n"); return MOSQ_ERR_SUCCESS; }
- 编写Makefile:
CC=gcc CFLAGS=-I/usr/local/include -fPIC -Wall -Wextra LDFLAGS=-shared TARGET=my_plugin.so SRC=my_plugin.c all: $(TARGET) $(TARGET): $(SRC) $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ clean: rm -f $(TARGET)
- 编译插件:
make
- 将插件复制到Mosquitto插件目录:
sudo cp my_plugin.so /usr/local/lib/mosquitto/
- 配置Mosquitto以加载插件:
编辑/etc/mosquitto/mosquitto.conf
文件,添加以下内容:
plugin_dir /usr/local/lib/mosquitto/ plugin my_plugin.so
- 重启Mosquitto服务:
sudo systemctl restart mosquitto
现在,当Mosquitto启动时,它将加载并运行my_plugin插件。你可以根据需要修改插件代码以实现自定义功能。更多关于Mosquitto插件开发的信息,请参考官方文档:https://mosquitto.org/man/mosquitto-plugin-3.html