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verify PUBACK for QoS 1

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This commit is contained in:
ladyada 2016-01-10 02:21:54 -05:00
parent d58783e3a1
commit 72b3ce172e
1 changed files with 12 additions and 1 deletions
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13
Adafruit_MQTT.cpp
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@ -240,7 +240,18 @@ bool Adafruit_MQTT::publish(const char *topic, const char *data, uint8_t qos) {
len = readPacket(buffer, 4, PUBLISH_TIMEOUT_MS);
DEBUG_PRINT(F("Publish QOS1+ reply:\t"));
DEBUG_PRINTBUFFER(buffer, len);
//TODO: Verify response packet?
if (len != 4)
return false;
if ((buffer[0] >> 4) != MQTT_CTRL_PUBACK)
return false;
uint16_t packnum = buffer[2];
packnum <<= 8;
packnum |= buffer[3];
// we increment the packet_id_counter right after publishing so inc here too to match
packnum++;
if (packnum != packet_id_counter)
return false;
}
return true;