MQTTClient_setCallback时出现分段故障 [英] Segmentation fault while MQTTClient_setCallbacks

问题描述

我有来自hivemq站点的SIMPe MQTT客户端应用程序：

MQTTClient client;
MQTTClient_create(&client, "ssl://xxx.s1.eu.hivemq.cloud:8883", "Client_1", MQTTCLIENT_PERSISTENCE_NONE, NULL);
    
int i = MQTTClient_setCallbacks(client, NULL, NULL, messageArrived, NULL);

在变量m->；c->；connect_state中设置回调时出现分段错误

有分段故障的MQTTClient.c代码：

int MQTTClient_setCallbacks(MQTTClient handle, void* context, MQTTClient_connectionLost* cl, MQTTClient_messageArrived* ma, MQTTClient_deliveryComplete* dc)
{
    int rc = MQTTCLIENT_SUCCESS;
    MQTTClients* m = handle;

    FUNC_ENTRY;
    Thread_lock_mutex(mqttclient_mutex);

    if (m == NULL || ma == NULL || m->c->connect_state != NOT_IN_PROGRESS)
...
}

ssl

我的函数推荐答案_CREATE返回错误(lundin是正确的)，因为我传递的连接字符串需要ssl，而我的当前库不支持ssl。因此，没有创建MQTTClient，我试图访问它的字段m->c->connect_state，但得到分段错误。

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