static int readPacket(MQTTClient* c, Timer* timer)
{
int rc = FAILURE;
MQTTHeader header = {0};
int len = 0;
int rem_len = 0;
#ifdef CONFIG_AXTLS
if(!(len = c->ipstack->mqttread(c->ipstack, c->readbuf, c->readbuf_size, TimerLeftMS(timer))))
goto exit;
#else
/* 1. read the header byte. This has the packet type in it */
if (c->ipstack->mqttread(c->ipstack, c->readbuf, 1, TimerLeftMS(timer)) != 1)
goto exit;
len = 1;
/* 2. read the remaining length. This is variable in itself */
decodePacket(c, &rem_len, TimerLeftMS(timer));
len += MQTTPacket_encode(c->readbuf + 1, rem_len); /* put the original remaining length back into the buffer */
/* 3. read the rest of the buffer using a callback to supply the rest of the data */
if (rem_len > 0 && (c->ipstack->mqttread(c->ipstack, c->readbuf + len, rem_len, TimerLeftMS(timer)) != rem_len))
goto exit;
#endif
header.byte = c->readbuf[0];
rc = header.bits.type;
exit:
return rc;
}
static int readPacket(MQTTClient *c, Timer *timer)
{
MQTTHeader header = {0};
int len = 0;
int rem_len = 0;
/* 1. read the header byte. This has the packet type in it */
int rc = c->ipstack->mqttread(c->ipstack, c->readbuf, 1, TimerLeftMS(timer));
if (rc != 1) {
goto exit;
}
len = 1;
/* 2. read the remaining length. This is variable in itself */
decodePacket(c, &rem_len, TimerLeftMS(timer));
len += MQTTPacket_encode(c->readbuf + 1, rem_len); /* put the original remaining length back into the buffer */
if (rem_len > (c->readbuf_size - len)) {
rc = BUFFER_OVERFLOW;
goto exit;
}
/* 3. read the rest of the buffer using a callback to supply the rest of the data */
if (rem_len > 0 && (rc = c->ipstack->mqttread(c->ipstack, c->readbuf + len, rem_len, TimerLeftMS(timer)) != rem_len)) {
rc = 0;
goto exit;
}
header.byte = c->readbuf[0];
rc = header.bits.type;
if (c->keepAliveInterval > 0) {
TimerCountdown(&c->last_received, c->keepAliveInterval); // record the fact that we have successfully received a packet
}
exit:
return rc;
}
static int sendPacket(MQTTClient* c, int length, Timer* timer)
{
int rc = FAILURE, sent = 0;
while ((sent < length) && !TimerIsExpired(timer)) {
rc = c->ipstack->mqttwrite(c->ipstack, &c->buf[sent], length, TimerLeftMS(timer));
if (rc < 0)
break;
sent += rc;
}
/*
The send progress only send the packet to the socket buffer
we dont know if it successeds, default it is SUCCESS
*/
if (sent == length) {
rc = SUCCESS;
} else {
rc = FAILURE;
}
return rc;
}
static int sendPacket(MQTTClient *c, int length, Timer *timer)
{
int rc = FAILURE,
sent = 0;
while (sent < length && !TimerIsExpired(timer)) {
rc = c->ipstack->mqttwrite(c->ipstack, &c->buf[sent], length, TimerLeftMS(timer));
if (rc < 0) { // there was an error writing the data
break;
}
sent += rc;
}
if (sent == length) {
TimerCountdown(&c->last_sent, c->keepAliveInterval); // record the fact that we have successfully sent the packet
rc = SUCCESS;
} else {
rc = FAILURE;
}
return rc;
}
