RT，或者說如何獲取消息來自哪個topic？

PS：我用 MQTTDeserialize_publish 解析數據的時候，得到的topicName.cstring打印出來是亂碼。

找到辦法了，寫出來供后來人使用：

?UINT8?????? *dup;
?UINT16????? *packetid;

?int???????? qos;
?int???????? payloadlen;
?UINT8?????? *payload;
?UINT8?????? *retained;
?MQTTString? topicName;

char topic[100];

MQTTDeserialize_publish( dup, &qos, retained, packetid, &topicName, &payload, &payloadlen, MyBuf, len );

?memcpy(topic, topicName.lenstring.data, topicName.lenstring.len);
?PRINT("topic:\"%s\"\n\r", topic);

????????????

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