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Fix subscribe for large payloads #36

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Fix subscribe for large payloads #36

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19 changes: 15 additions & 4 deletions paho_mqtt_embedded_c/MQTTClient/src/MQTTClient.h
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Original file line number Diff line number Diff line change
Expand Up @@ -473,10 +473,22 @@ int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::readPacket(Timer& tim
}

/* 3. read the rest of the buffer using a callback to supply the rest of the data */
if (rem_len > 0 && (ipstack.read(readbuf + len, rem_len, timer.left_ms()) != rem_len))
while (rem_len > 0)
{
rc = FAILURE;
goto exit;
const int read_len = ipstack.read(readbuf + len, rem_len, timer.left_ms());
if (read_len < 0 || rem_len < read_len) // Error
{
rc = FAILURE;
goto exit;
}
if (read_len == 0) // Time out
{
rc = 0;
goto exit;
}

len += read_len;
rem_len -= read_len;
}

header.byte = readbuf[0];
Expand Down Expand Up @@ -581,7 +593,6 @@ int MQTT::Client<Network, Timer, a, b>::yield(unsigned long timeout_ms)
return rc;
}


template<class Network, class Timer, int MAX_MQTT_PACKET_SIZE, int b>
int MQTT::Client<Network, Timer, MAX_MQTT_PACKET_SIZE, b>::cycle(Timer& timer)
{
Expand Down