Library Fixes (#127)

* Removing warnings

* handle reading zero-length packets

* updating travis to exclude archived libraries, addin Arduino WiFi101 lib instead

* adding esp lib to travis

* restrict builds to current hardware platforms

* travis, esp8266: skip esp target for non-esp-based examples

* adding test skips for zero, fixing fingerprint error

bump library version

.travis.yml

@@ -3,9 +3,11 @@ sudo: false
 before_install:
   - source <(curl -SLs https://raw.githubusercontent.com/adafruit/travis-ci-arduino/master/install.sh)
 install:
-  - arduino --install-library "Adafruit SleepyDog Library,Adafruit FONA Library,Adafruit CC3000 Library,Adafruit_WINC1500"
+  - arduino --install-library "Adafruit SleepyDog Library","Adafruit FONA Library"
 script:
-  - build_main_platforms
+  - build_platform esp8266
+  - arduino --install-library "WiFi101"
+  - build_platform zero
 notifications:
   email:
     on_success: change

Adafruit_MQTT.cpp

@@ -189,7 +189,6 @@ int8_t Adafruit_MQTT::connect() {
 	success = true;
 	break;
       }
-      //Serial.println("\t**failed, retrying!");
     }
     if (! success) return -2; // failed to sub for some reason
   }
@@ -206,15 +205,20 @@ int8_t Adafruit_MQTT::connect(const char *user, const char *pass)
 
 uint16_t Adafruit_MQTT::processPacketsUntil(uint8_t *buffer, uint8_t waitforpackettype, uint16_t timeout) {
   uint16_t len;
-  while (len = readFullPacket(buffer, MAXBUFFERSIZE, timeout)) {
 
-    //DEBUG_PRINT("Packet read size: "); DEBUG_PRINTLN(len);
-    // TODO: add subscription reading & call back processing here
+  while(true) {
+    len = readFullPacket(buffer, MAXBUFFERSIZE, timeout);
 
-    if ((buffer[0] >> 4) == waitforpackettype) {
-      //DEBUG_PRINTLN(F("Found right packet")); 
+    if(len == 0){
+      break;
+    }
+
+    if ((buffer[0] >> 4) == waitforpackettype)
+    {
       return len;
-    } else {
+    }
+    else
+    {
       ERROR_PRINTLN(F("Dropped a packet"));
     }
   }
@@ -407,7 +411,6 @@ bool Adafruit_MQTT::unsubscribe(Adafruit_MQTT_Subscribe *sub) {
 }
 
 void Adafruit_MQTT::processPackets(int16_t timeout) {
-  uint16_t len;
 
   uint32_t elapsed = 0, endtime, starttime = millis();
 
@@ -482,7 +485,7 @@ Adafruit_MQTT_Subscribe *Adafruit_MQTT::readSubscription(int16_t timeout) {
   if (i==MAXSUBSCRIPTIONS) return NULL; // matching sub not found ???
 
   uint8_t packet_id_len = 0;
-  uint16_t packetid;
+  uint16_t packetid = 0;
   // Check if it is QoS 1, TODO: we dont support QoS 2
   if ((buffer[0] & 0x6) == 0x2) {
     packet_id_len = 2;

Adafruit_MQTT_Client.cpp

@@ -53,6 +53,7 @@ uint16_t Adafruit_MQTT_Client::readPacket(uint8_t *buffer, uint16_t maxlen,
   uint16_t len = 0;
   int16_t t = timeout;
 
+
   while (client->connected() && (timeout >= 0)) {
     //DEBUG_PRINT('.');
     while (client->available()) {
@@ -62,6 +63,11 @@ uint16_t Adafruit_MQTT_Client::readPacket(uint8_t *buffer, uint16_t maxlen,
       buffer[len] = c;
       //DEBUG_PRINTLN((uint8_t)c, HEX);
       len++;
+
+      if (maxlen == 0) { // handle zero-length packets
+        return 0;
+      }
+
       if (len == maxlen) {  // we read all we want, bail
         DEBUG_PRINT(F("Read data:\t"));
         DEBUG_PRINTBUFFER(buffer, len);

examples/adafruitio_anon_time_esp8266/.zero.test.skip

@@ -0,0 +1 @@
+

examples/adafruitio_errors_esp8266/.zero.test.skip

@@ -0,0 +1 @@
+

examples/adafruitio_secure_esp8266/.zero.test.skip

@@ -0,0 +1 @@
+

examples/adafruitio_secure_esp8266/adafruitio_secure_esp8266.ino

@@ -40,9 +40,8 @@ WiFiClientSecure client;
 // Setup the MQTT client class by passing in the WiFi client and MQTT server and login details.
 Adafruit_MQTT_Client mqtt(&client, AIO_SERVER, AIO_SERVERPORT, AIO_USERNAME, AIO_KEY);
 
-// io.adafruit.com SHA1 fingerprint. Current fingerprint can be verified via: 
-//   echo | openssl s_client -connect io.adafruit.com:443 |& openssl x509 -fingerprint -noout
-#define AIO_SSL_FINGERPRINT "77 00 54 2D DA E7 D8 03 27 31 23 99 EB 27 DB CB A5 4C 57 18"
+// io.adafruit.com SHA1 fingerprint
+const char* fingerprint = "AD 4B 64 B3 67 40 B5 FC 0E 51 9B BD 25 E9 7F 88 B6 2A A3 5B";
 
 /****************************** Feeds ***************************************/
 

examples/adafruitio_time_esp8266/.zero.test.skip

@@ -0,0 +1 @@
+

examples/mqtt_2subs_esp8266/.zero.test.skip

@@ -0,0 +1 @@
+

examples/mqtt_esp8266/.zero.test.skip

@@ -0,0 +1 @@
+

examples/mqtt_esp8266_callback/.esp8266.test.skip

@@ -0,0 +1 @@
+

examples/mqtt_esp8266_callback/.zero.test.skip

@@ -0,0 +1 @@
+

examples/mqtt_ethernet/.zero.test.skip

@@ -0,0 +1 @@
+

examples/mqtt_fona/.zero.test.skip

@@ -0,0 +1 @@
+

examples/mqtt_winc1500/.esp8266.test.skip

@@ -0,0 +1 @@
+

examples/mqtt_yun/.esp8266.test.skip

@@ -0,0 +1 @@
+

examples/mqtt_yun/.zero.test.skip

@@ -0,0 +1 @@
+

library.properties

@@ -1,5 +1,5 @@
 name=Adafruit MQTT Library
-version=0.20.1
+version=0.20.2
 author=Adafruit
 maintainer=Adafruit <info@adafruit.com>
 sentence=MQTT library that supports the FONA, ESP8266, Yun, and generic Arduino Client hardware.