{"id":2912,"date":"2022-04-18T14:18:48","date_gmt":"2022-04-18T06:18:48","guid":{"rendered":"https:\/\/aif.amtbbs.org\/?p=2912"},"modified":"2022-04-18T14:18:48","modified_gmt":"2022-04-18T06:18:48","slug":"%e7%89%a9%e8%81%94%e7%bd%91%e7%bd%91%e5%85%b3%e5%a6%82%e4%bd%95%e4%b8%8e%e4%ba%91%e5%b9%b3%e5%8f%b0%e8%bf%9b%e8%a1%8c%e4%ba%a4%e4%ba%92%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/aif.amtbbs.org\/index.php\/2022\/04\/18\/2912\/","title":{"rendered":"\u7269\u8054\u7f51\u7f51\u5173\u5982\u4f55\u4e0e\u4e91\u5e73\u53f0\u8fdb\u884c\u4ea4\u4e92\uff1f"},"content":{"rendered":"

\u7269\u8054\u7f51<\/span>\u7f51\u5173\u5f00\u53d1\uff1a\u57fa\u4e8eMQTT\u6d88\u606f\u603b\u7ebf\u7684\u8bbe\u8ba1\u8fc7\u7a0b\uff08\u4e0a\uff09\uff0c\u6211\u4eec\u804a\u4e86\u5728\u4e00\u4e2a\u7269\u8054\u7f51\u7cfb\u7edf\u7684\u7f51\u5173\u4e2d\uff0c\u5982\u4f55\u5229\u7528 MQTT \u6d88\u606f\u603b\u7ebf\uff0c\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u5185\u90e8\u5b9e\u73b0\u591a\u4e2a\u8fdb\u7a0b\u4e4b\u95f4\u7684\u76f8\u4e92\u901a\u4fe1\u95ee\u9898\u3002<\/p>\n

\u8fd9\u4e2a\u901a\u4fe1\u6a21\u578b\u7684\u6700\u5927\u51e0\u4e2a\u4f18\u70b9\u662f\uff1a<\/p>\n

\u6a21\u5757\u4e4b\u95f4\u89e3\u8026\u5408\uff1b\u5404\u6a21\u5757\u4e4b\u95f4\u53ef\u4ee5\u5e76\u884c\u5f00\u53d1\uff1b\u628a TCP \u94fe\u63a5\u548c\u7c98\u5305\u95ee\u9898\u4ea4\u7ed9\u6d88\u606f\u603b\u7ebf\u5904\u7406\uff0c\u6211\u4eec\u53ea\u9700\u8981\u5904\u7406\u4e1a\u52a1\u5c42\u7684\u4e1c\u897f\uff1b\u8c03\u8bd5\u65b9\u4fbf\uff1b<\/p>\n

\u4ee5\u4e0a\u53ea\u662f\u63cf\u8ff0\u4e86\u5728\u4e00\u4e2a\u5d4c\u5165\u5f0f\u7cfb\u7edf\u5185\u90e8\uff0c\u8fdb\u7a0b\u4e4b\u95f4\u7684\u901a\u4fe1\u65b9\u5f0f\uff0c\u90a3\u4e48\u7f51\u5173\u5982\u4f55\u4e0e\u4e91\u5e73\u53f0\u8fdb\u884c\u4ea4\u4e92\u5462\uff1f<\/p>\n

\u5728\u4e0a\u4e00\u7bc7\u6587\u7ae0\u4e2d\u5df2\u7ecf\u63d0\u5230\u8fc7\uff1a\u7f51\u5173\u4e0e\u4e91\u5e73\u53f0\u4e4b\u95f4\u7684\u901a\u4fe1\u65b9\u5f0f\u4e00\u822c\u90fd\u662f\u5ba2\u6237\u6307\u5b9a\u7684\uff0c\u5c31\u90a3\u4e48\u51e0\u79cd\uff08\u963f\u91cc\u4e91\u3001\u534e\u4e3a\u4e91\u3001\u817e\u8baf\u4e91\u3001\u4e9a\u9a6c\u900aAWS\u5e73\u53f0\uff09\u3002\u4e00\u822c\u90fd\u8981\u6c42\u7f51\u5173\u4e0e\u4e91\u5e73\u53f0\u4e4b\u95f4\u5904\u4e8e\u957f\u8fde\u63a5\u7684\u72b6\u6001\uff0c\u8fd9\u6837\u4e91\u7aef\u7684\u5404\u79cd\u6307\u4ee4\u5c31\u53ef\u4ee5\u968f\u65f6\u53d1\u9001\u5230\u7f51\u5173\u3002<\/p>\n

\u8fd9\u4e00\u7bc7\u6587\u7ae0\uff0c\u6211\u4eec\u5c31\u6765\u804a\u4e00\u804a\u8fd9\u90e8\u5206\u5185\u5bb9\u3002<\/p>\n

\u4e8c\u3001\u4e0e\u4e91\u5e73\u53f0\u4e4b\u95f4\u7684 MQTT \u8fde\u63a5<\/strong><\/p>\n

\u76ee\u524d\u7684\u51e0\u5927\u7269\u8054\u7f51\u4e91\u5e73\u53f0\uff0c\u90fd\u63d0\u4f9b\u4e86\u4e0d\u540c\u7684\u63a5\u5165\u65b9\u5f0f\u3002\u5bf9\u4e8e\u7f51\u5173\u6765\u8bf4\uff0c\u5e94\u7528\u6700\u591a\u7684\u5c31\u662f MQTT \u63a5\u5165\u3002<\/p>\n

\u6211\u4eec\u77e5\u9053\uff0cMQTT \u53ea\u662f\u4e00\u4e2a\u534f\u8bae\u800c\u5df2\uff0c\u4e0d\u540c\u7684\u7f16\u7a0b\u8bed\u8a00\u4e2d\u90fd\u6709\u5b9e\u73b0\uff0c\u5728 C \u8bed\u8a00\u4e2d\u4e5f\u6709\u597d\u51e0\u4e2a\u5b9e\u73b0\u3002<\/p>\n

\u5728\u7f51\u5173\u5185\u90e8\uff0c\u8fd0\u884c\u7740\u4e00\u4e2a\u540e\u53f0 deamon\uff1a MQTT Broker\uff0c\u5176\u5b9e\u5c31\u662f mosquitto \u8fd9\u4e2a\u53ef\u6267\u884c\u7a0b\u5e8f\uff0c\u5b83\u5145\u5f53\u7740\u6d88\u606f\u603b\u7ebf\u7684\u529f\u80fd\u3002\u8fd9\u91cc\u8bf7\u5927\u5bb6\u6ce8\u610f\uff1a\u56e0\u4e3a\u8fd9\u4e2a\u6d88\u606f\u603b\u7ebf\u662f\u8fd0\u884c\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u7684\u5185\u90e8\uff0c\u63a5\u5165\u603b\u7ebf\u7684\u5ba2\u6237\u7aef\u5c31\u662f\u9700\u8981\u76f8\u4e92\u901a\u4fe1\u7684\u90a3\u4e9b\u8fdb\u7a0b\u3002\u8fd9\u4e9b\u8fdb\u7a0b\u7684\u6570\u91cf\u662f\u6709\u9650\u7684\uff0c\u5373\u4f7f\u662f\u4e00\u4e2a\u6bd4\u8f83\u590d\u6742\u7684\u7cfb\u7edf\uff0c\u6700\u591a\u5341\u51e0\u4e2a\u8fdb\u7a0b\u4e5f\u5c31\u5dee\u4e0d\u591a\u4e86\u3002\u56e0\u6b64\uff0cmosquitto \u8fd9\u4e2a\u5b9e\u73b0\u662f\u5b8c\u5168\u53ef\u4ee5\u652f\u6491\u7cfb\u7edf\u8d1f\u8f7d\u7684\u3002<\/p>\n

\u90a3\u4e48\uff0c\u5982\u679c\u5728\u4e91\u7aef\u90e8\u7f72\u4e00\u4e2a MQTT Broker\uff0c\u7406\u8bba\u4e0a\u662f\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528 mosquitto \u8fd9\u4e2a\u5b9e\u73b0\u6765\u4f5c\u4e3a\u6d88\u606f\u603b\u7ebf\u7684\uff0c\u4f46\u662f\u4f60\u8981\u8bc4\u4f30\u63a5\u5165\u7684\u5ba2\u6237\u7aef\uff08\u4e5f\u5c31\u662f\u7f51\u5173\uff09\u5728\u4e00\u4e2a\u4ec0\u4e48\u6837\u7684\u6570\u91cf\u7ea7\uff0c\u8003\u8651\u5230\u5e76\u53d1\u7684\u95ee\u9898\uff0c\u4e00\u5b9a\u8981\u505a\u538b\u529b\u6d4b\u8bd5\u3002<\/p>\n

\u5bf9\u4e8e\u540e\u53f0\u5f00\u53d1\uff0c\u6211\u7684\u7ecf\u9a8c\u4e0d\u591a\uff0c\u4e0d\u6562\uff08\u4e5f\u4e0d\u80fd\uff09\u591a\u8a00\uff0c\u8bef\u5bfc\u5927\u5bb6\u5c31\u7f6a\u8fc7\u4e86\u3002\u4e0d\u8fc7\uff0c\u5bf9\u4e8e\u4e00\u822c\u7684\u5b66\u4e60\u548c\u6d4b\u8bd5\u6765\u8bf4\uff0c\u5728\u4e91\u7aef\u76f4\u63a5\u90e8\u7f72 mosquitto \u4f5c\u4e3a\u6d88\u606f\u603b\u7ebf\uff0c\u662f\u6ca1\u6709\u95ee\u9898\u7684\u3002<\/p>\n

\u4e09\u3001Proc\uff3fBridge \u8fdb\u7a0b\uff1a\u5916\u90e8\u548c\u5185\u90e8\u6d88\u606f\u603b\u7ebf\u4e4b\u95f4\u7684\u6865\u63a5\u5668<\/strong><\/p>\n

\u4e0b\u9762\u8fd9\u5f20\u56fe\uff0c\u8bf4\u660e\u4e86 Proc\uff3fBridge \u8fdb\u7a0b\u5728\u8fd9\u4e2a\u6a21\u578b\u4e2d\u7684\u4f5c\u7528\uff1a<\/p>\n

<\/p>\n

\u4ece\u4e91\u5e73\u53f0\u6d88\u606f\u603b\u7ebf\u63a5\u6536\u5230\u7684\u6d88\u606f\uff0c\u9700\u8981\u8f6c\u53d1\u5230\u5185\u90e8\u7684\u6d88\u606f\u603b\u7ebf\uff1b\u4ece\u5185\u90e8\u6d88\u606f\u603b\u7ebf\u63a5\u6536\u5230\u7684\u6d88\u606f\uff0c\u9700\u8981\u8f6c\u53d1\u5230\u4e91\u5e73\u53f0\u7684\u6d88\u606f\u603b\u7ebf\uff1b<\/p>\n

\u5982\u679c\u7528 mosquitto \u6765\u5b9e\u73b0\uff0c\u5e94\u8be5\u5982\u4f55\u6765\u5b9e\u73b0\u5462\uff1f<\/p>\n

1\uff0e mosquitto \u7684 API \u63a5\u53e3<\/p>\n

mosquitto \u8fd9\u4e2a\u5b9e\u73b0\u662f\u57fa\u4e8e\u56de\u8c03\u51fd\u6570\u7684\u673a\u5236\u6765\u8fd0\u884c\u7684\uff0c\u4f8b\u5982\uff1a<\/p>\n

\uff0f\uff0f \u8fde\u63a5\u6210\u529f\u65f6\u7684\u56de\u8c03\u51fd\u6570void my\uff3fconnect\uff3fcallback\uff08struct mosquitto \uff0amosq\uff0c void \uff0aobj\uff0c int rc\uff09\uff5b \u00a0 \u00a0\uff0f\uff0f \uff0e\uff0e\uff0e\uff5d
\n\uff0f\uff0f \u8fde\u63a5\u5931\u8d25\u65f6\u7684\u56de\u8c03\u51fd\u6570void my\uff3fdisconnect\uff3fcallback\uff08struct mosquitto \uff0amosq\uff0c void \uff0aobj\uff0c int result\uff09\uff5b \u00a0 \u00a0\uff0f\uff0f \uff0e\uff0e\uff0e\uff5d
\n\uff0f\uff0f \u63a5\u6536\u5230\u6d88\u606f\u65f6\u7684\u56de\u8c03\u51fd\u6570void my\uff3fmessage\uff3fcallback\uff08struct mosquitto \uff0amosq\uff0c void \uff0aobj\uff0c const struct mosquitto\uff3fmessage \uff0amessage\uff09\uff5b \u00a0\uff0f\uff0f \uff0e\uff0e\uff5d
\nint main\uff08\uff09\uff5b \u00a0 \u00a0\uff0f\uff0f \u5176\u4ed6\u4ee3\u7801 \u00a0 \u00a0\uff0f\uff0f \uff0e\uff0e\uff0e \u00a0 \u00a0 \u00a0 \u00a0\uff0f\uff0f \u521b\u5efa\u4e00\u4e2a mosquitto \u5bf9\u8c61 \u00a0 \u00a0struct mosquitto g\uff3fmosq \uff1d mosquitto\uff3fnew\uff08\uff02client\uff3fname\uff02\uff0c true\uff0c NULL\uff09\uff1b \u00a0 \u00a0 \u00a0 \u00a0\uff0f\uff0f \u6ce8\u518c\u56de\u8c03\u51fd\u6570 \u00a0 \u00a0mosquitto\uff3fconnect\uff3fcallback\uff3fset\uff08g\uff3fmosq\uff0c my\uff3fconnect\uff3fcallback\uff09\uff1b \u00a0 \u00a0mosquitto\uff3fdisconnect\uff3fcallback\uff3fset\uff08g\uff3fmosq\uff0c my\uff3fdisconnect\uff3fcallback\uff09\uff1b \u00a0 \u00a0mosquitto\uff3fmessage\uff3fcallback\uff3fset\uff08g\uff3fmosq\uff0c my\uff3fmessage\uff3fcallback\uff09\uff1b \u00a0 \u00a0\uff0f\uff0f \u8fd9\u91cc\u8fd8\u6709\u5176\u4ed6\u7684\u56de\u8c03\u51fd\u6570\u8bbe\u7f6e \u00a0 \u00a0 \u00a0\uff0f\uff0f \u5f00\u59cb\u8fde\u63a5\u5230\u6d88\u606f\u603b\u7ebf \u00a0 \u00a0mosquitto\uff3fconnect\uff08g\uff3fmosq\uff0c \uff02127\uff0e0\uff0e0\uff0e1\uff02\uff0c 1883\uff0c 60\uff09\uff1b \u00a0 \u00a0 \u00a0while\uff081\uff09 \u00a0 \u00a0\uff5b \u00a0 \u00a0 \u00a0int rc \uff1d mosquitto\uff3floop\uff08g\uff3fmosq\uff0c \uff0d1\uff0c 1\uff09\uff1b \u00a0 \u00a0 \u00a0if \uff08rc\uff09 \uff5b \u00a0 \u00a0 \u00a0 \u00a0printf\uff08\uff02mqtt\uff3fportal\uff1a mosquitto\uff3floop rc \uff1d \uff05d \uff02\uff0c rc\uff09\uff1b \u00a0 \u00a0 \u00a0 \u00a0sleep\uff081\uff09\uff1b \u00a0 \u00a0 \u00a0 \u00a0mosquitto\uff3freconnect\uff08g\uff3fmosq\uff09\uff1b \u00a0 \u00a0 \u00a0\uff5d \u00a0 \u00a0\uff5d \u00a0 \u00a0mosquitto\uff3fdestroy\uff08g\uff3fmosq\uff09\uff1b \u00a0 \u00a0mosquitto\uff3flib\uff3fcleanup\uff08\uff09\uff1b \u00a0 \u00a0return 0\uff1b\uff5d<\/p>\n

\u4ee5\u4e0a\u4ee3\u7801\u5c31\u662f\u4e00\u4e2a mosquitto \u5ba2\u6237\u7aef\u7684\u6700\u7b80\u4ee3\u7801\u4e86\uff0c\u4f7f\u7528\u56de\u8c03\u51fd\u6570\u7684\u673a\u5236\uff0c\u8ba9\u7a0b\u5e8f\u7684\u5f00\u53d1\u975e\u5e38\u7b80\u5355\u3002<\/p>\n

mosquitto \u628a\u5e95\u5c42\u7684\u7ec6\u8282\u95ee\u9898\u90fd\u5e2e\u52a9\u6211\u4eec\u5904\u7406\u4e86\uff0c\u53ea\u8981\u6211\u4eec\u6ce8\u518c\u7684\u51fd\u6570\u88ab\u8c03\u7528\u4e86\uff0c\u5c31\u8bf4\u660e\u53d1\u751f\u4e86\u6211\u4eec\u611f\u5174\u8da3\u7684\u4e8b\u4ef6\u3002<\/p>\n

\u8fd9\u6837\u7684\u56de\u8c03\u673a\u5236\u5728\u5404\u79cd\u5f00\u6e90\u8f6f\u4ef6\u4e2d\u4f7f\u7528\u7684\u6bd4\u8f83\u591a\uff0c\u6bd4\u5982\uff1aglib \u91cc\u7684\u5b9a\u65f6\u5668\u3001libevent\u901a\u8baf\u5904\u7406\u3001libmodbus \u91cc\u7684\u6570\u636e\u5904\u7406\u3001linux \u5185\u6838\u4e2d\u7684\u9a71\u52a8\u5f00\u53d1\u548c\u5b9a\u65f6\u5668\uff0c\u90fd\u662f\u8fd9\u4e2a\u5957\u8def\uff0c\u4e00\u901a\u767e\u901a\uff01<\/p>\n

\u5728\u7f51\u5173\u4e2d\u7684\u6bcf\u4e2a\u8fdb\u7a0b\uff0c\u53ea\u9700\u8981\u6dfb\u52a0\u4e0a\u9762\u8fd9\u90e8\u5206\u4ee3\u7801\uff0c\u5c31\u53ef\u4ee5\u6302\u8f7d\u5230\u6d88\u606f\u603b\u7ebf\u4e0a\uff0c\u4ece\u800c\u53ef\u4ee5\u4e0e\u5176\u5b83\u8fdb\u7a0b\u8fdb\u884c\u6536\u53d1\u6570\u636e\u4e86\u3002<\/p>\n

2\uff0e \u5229\u7528 UserData \u6307\u9488\uff0c\u5b9e\u73b0\u591a\u4e2a MQTT \u8fde\u63a5<\/p>\n

\u4e0a\u9762\u7684\u5b9e\u4f8b\u4ec5\u4ec5\u662f\u8fde\u63a5\u5230\u4e00\u4e2a\u6d88\u606f\u603b\u7ebf\u4e0a\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u666e\u901a\u7684\u8fdb\u7a0b\u6765\u8bf4\uff0c\u8fbe\u5230\u4e86\u901a\u4fe1\u7684\u76ee\u7684\u3002<\/p>\n

\u4f46\u662f\u5bf9\u4e8e Proc\uff3fBridge \u8fdb\u7a0b\u6765\u8bf4\uff0c\u8fd8\u6ca1\u6709\u8fbe\u5230\u76ee\u7684\uff0c\u56e0\u4e3a\u8fd9\u4e2a\u8fdb\u7a0b\u5904\u4e8e\u6865\u63a5\u7684\u4f4d\u7f6e\uff0c\u9700\u8981\u540c\u65f6\u8fde\u63a5\u5230\u8fdc\u7a0b\u548c\u672c\u5730\u8fd9\u4e24\u4e2a\u6d88\u606f\u603b\u7ebf\u4e0a\u3002\u90a3\u4e48\u5e94\u8be5\u5982\u4f55\u5b9e\u73b0\u5462\uff1f<\/p>\n

\u770b\u4e00\u4e0b mosquitto\uff3fnew \u8fd9\u4e2a\u51fd\u6570\u7684\u7b7e\u540d\uff1a<\/p>\n

\uff0a obj \uff0d A user pointer that will be passed as an argument to any \uff0a \u00a0 \u00a0 \u00a0callbacks that are specified\uff0e\u6700\u540e\u4e00\u4e2a\u53c2\u6570\u7684\u4f5c\u7528\u662f\uff1a\u53ef\u4ee5\u8bbe\u7f6e\u4e00\u4e2a\u7528\u6237\u81ea\u5df1\u7684\u6570\u636e\uff08\u4f5c\u4e3a\u6307\u9488\u4f20\u5165\uff09\uff0c\u90a3\u4e48mosquitto \u5728\u56de\u8c03\u6211\u4eec\u7684\u6ce8\u518c\u7684\u4efb\u4f55\u4e00\u4e2a\u51fd\u6570\u65f6\uff0c\u90fd\u4f1a\u628a\u8fd9\u4e2a\u6307\u9488\u4f20\u5165\u3002
\n\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u8fd9\u4e2a\u53c2\u6570\u6765\u533a\u5206\u8fd9\u4e2a\u8fde\u63a5\u662f\u8fdc\u7a0b\u8fde\u63a5\uff1f\u8fd8\u662f\u672c\u5730\u8fde\u63a5\u3002libmosq\uff3fEXPORT struct mosquitto \uff0amosquitto\uff3fnew\uff08const char \uff0aid\uff0c bool clean\uff3fsession\uff0c void \uff0aobj\uff09\uff1b<\/p>\n

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\uff0f\uff0f \u5206\u914d\u7ed3\u6784\u4f53\u53d8\u91cfMQData userData \uff1d \uff08MQData \uff0a\uff09malloc\uff08sizeof\uff08MQData\uff09\uff09\uff1b
\n\uff0f\uff0f \u8bbe\u7f6e\u5c5e\u4e8e\u8fd9\u91cc\u8fde\u63a5\u7684\u53c2\u6570\uff1a id\uff0c name \u7b49\u7b49
\n\uff0f\uff0f \u521b\u5efa mosquitto \u5bf9\u8c61\u65f6\uff0c\u4f20\u5165 userData\u3002struct mosquitto \uff0amosq \uff1d mosquitto\uff3fnew\uff08userData\uff0d\uff1eid\uff0c true\uff0c userData\uff09\uff1b
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\u53e6\u5916\u4e00\u4e2a\u95ee\u9898\uff1a\u4e0d\u77e5\u9053\u4f60\u662f\u5426\u6ce8\u610f\u5230\u793a\u4f8b\u4e2d\u7684 mosquitto\uff3floop\uff08\uff09 \u8fd9\u4e2a\u51fd\u6570\uff1f\u8fd9\u4e2a\u51fd\u6570\u9700\u8981\u653e\u5728 while \u6b7b\u5faa\u73af\u4e2d\u4e0d\u505c\u7684\u8c03\u7528\uff0c\u624d\u80fd\u51fa\u53d1 mosuiqtto \u5185\u90e8\u7684\u4e8b\u4ef6\u3002\uff08\u5176\u5b9e\u5728 mosuiqtto \u4e2d\uff0c\u8fd8\u63d0\u4f9b\u4e86\u53e6\u4e00\u4e2a\u7b80\u5316\u7684\u51fd\u6570 mosquitto\uff3floop\uff3fforever\uff09\u3002<\/p>\n

\u4e5f\u5c31\u662f\u8bf4\uff1a\u5728\u6bcf\u4e2a\u8fde\u63a5\u4e2d\uff0c\u9700\u8981\u6301\u7eed\u7684\u89e6\u53d1 mosquitto \u5e95\u5c42\u7684\u4e8b\u4ef6\uff0c\u624d\u80fd\u8ba9\u6d88\u606f\u7cfb\u7edf\u987a\u5229\u7684\u6536\u53d1\u3002\u56e0\u6b64\uff0c\u5728\u793a\u4f8b\u4ee3\u7801\u4e2d\uff0c\u4f7f\u7528\u4e24\u4e2a\u7ebf\u7a0b\u5206\u522b\u8fde\u63a5\u5230\u4e91\u5e73\u53f0\u7684\u603b\u7ebf\u548c\u5185\u90e8\u7684\u603b\u7ebf\u3002<\/p>\n

\u56db\u3001\u603b\u7ed3<\/strong><\/p>\n

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