static int MqttSample_CmdUnsubscribe(struct MqttSampleContext *ctx)
{
int err;
char topic[1024];
sprintf(topic, "45523/test-1");
err = Mqtt_PackUnsubscribePkt(ctx->mqttbuf, 11, topic);
if(err != MQTTERR_NOERROR) {
printf("Critical bug: failed to pack the unsubscribe packet.\n");
return -1;
}
if(err != MQTTERR_NOERROR) {
printf("Critical bug: failed to append the topic to the "
"unsubscribe packet.\n");
return -1;
}
return 0;
}
/**
* @brief 设备取消订阅，TOPIC是TOPIC_TO_UNSUB
* @param ctx:上下文变量
* @retval ret:0,成功，<0 失败
**/
static int MqttSample_CmdUnsubscribe(struct MqttSampleContext *ctx)
{
int err;
int bytes = 0;
printf("%s %d\n", __func__, __LINE__);
err = Mqtt_PackUnsubscribePkt(ctx->mqttbuf, PACK_FALG_UNSUB, TOPIC_TO_UNSUB);
if(err != MQTTERR_NOERROR)
{
printf("Critical bug: failed to pack the unsubscribe packet.\n");
return -1;
}
err = Mqtt_AppendUnsubscribeTopic(ctx->mqttbuf, TOPIC_TO_UNSUB);
if(err != MQTTERR_NOERROR)
{
printf("Critical bug: failed to append the topic to the "
"unsubscribe packet.\n");
return -1;
}
bytes = Mqtt_SendPkt(ctx->mqttctx, ctx->mqttbuf, 0);
MqttBuffer_Reset(ctx->mqttbuf);
return 0;
}
