arduino/Adafruit_MQTT_Library
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MQTT with QOS 1 or 2 forbids a packet ID of 0.

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This commit is contained in:
Dan Lizotte
2021-04-02 18:09:40 -04:00
parent f63a37b6fb
commit 4f76558624
1 changed files with 9 additions and 9 deletions
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18
Adafruit_MQTT.cpp
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@@ -116,7 +116,7 @@ Adafruit_MQTT::Adafruit_MQTT(const char *server, uint16_t port, const char *cid,
will_qos = 0; will_qos = 0;
will_retain = 0; will_retain = 0;
packet_id_counter = 0; packet_id_counter = 1; // MQTT spec forbids packet id of 0 if QOS=1
} }
Adafruit_MQTT::Adafruit_MQTT(const char *server, uint16_t port, Adafruit_MQTT::Adafruit_MQTT(const char *server, uint16_t port,
@@ -137,7 +137,7 @@ Adafruit_MQTT::Adafruit_MQTT(const char *server, uint16_t port,
will_qos = 0; will_qos = 0;
will_retain = 0; will_retain = 0;
packet_id_counter = 0; packet_id_counter = 1; // MQTT spec forbids packet id of 0 if QOS=1
} }
int8_t Adafruit_MQTT::connect() { int8_t Adafruit_MQTT::connect() {
@@ -342,7 +342,7 @@ bool Adafruit_MQTT::publish(const char *topic, uint8_t *data, uint16_t bLen,
// we increment the packet_id_counter right after publishing so inc here too // we increment the packet_id_counter right after publishing so inc here too
// to match // to match
packnum++; packnum = packnum + 1 + (packnum + 1 == 0); //Skip zero
if (packnum != packet_id_counter) if (packnum != packet_id_counter)
return false; return false;
} }
@@ -709,8 +709,8 @@ uint16_t Adafruit_MQTT::publishPacket(uint8_t *packet, const char *topic,
p[1] = packet_id_counter & 0xFF; p[1] = packet_id_counter & 0xFF;
p += 2; p += 2;
// increment the packet id // increment the packet id, skipping 0
packet_id_counter++; packet_id_counter = packet_id_counter + 1 + (packet_id_counter + 1 == 0);
} }
memmove(p, data, bLen); memmove(p, data, bLen);
@@ -735,8 +735,8 @@ uint8_t Adafruit_MQTT::subscribePacket(uint8_t *packet, const char *topic,
p[1] = packet_id_counter & 0xFF; p[1] = packet_id_counter & 0xFF;
p += 2; p += 2;
// increment the packet id // increment the packet id, skipping 0
packet_id_counter++; packet_id_counter = packet_id_counter + 1 + (packet_id_counter + 1 == 0);
p = stringprint(p, topic); p = stringprint(p, topic);
@@ -764,8 +764,8 @@ uint8_t Adafruit_MQTT::unsubscribePacket(uint8_t *packet, const char *topic) {
p[1] = packet_id_counter & 0xFF; p[1] = packet_id_counter & 0xFF;
p += 2; p += 2;
// increment the packet id // increment the packet id, skipping 0
packet_id_counter++; packet_id_counter = packet_id_counter + 1 + (packet_id_counter + 1 == 0);
p = stringprint(p, topic); p = stringprint(p, topic);