Hill Kim / W5200Interface

MQTT client test with W5200 ethernet shield

Dependents:   IBMIoTClientEthernetExample_W5200

Fork of W5500Interface by W5500-Ethernet-Interface Makers

Diff: Socket/UDPSocket.cpp

Revision:
8:7609a4bd55fd
Parent:
5:8aefaef88f79
diff -r da52bf0e0e5d -r 7609a4bd55fd Socket/UDPSocket.cpp
--- a/Socket/UDPSocket.cpp	Mon Sep 29 05:03:41 2014 +0000
+++ b/Socket/UDPSocket.cpp	Mon Oct 06 01:37:10 2014 +0000
@@ -82,6 +82,12 @@
     if (udp_size > (size-sizeof(info))) {
         return -1;
     }
+    /* Perform Length check here to prevent buffer overrun */
+    /* fixed by Sean Newton (https://developer.mbed.org/users/SeanNewton/) */
+    if (udp_size > length) {
+        //printf("udp_size: %d\n",udp_size);
+        return -1;
+    }
     return eth->recv(_sock_fd, buffer, udp_size);
 }