WIZnet / WIZnet_Library

This is WIZnet Ethernet Interface using Hardware TCP/IP chip, W5500, W5200 and W5100. One of them can be selected by enabling it in wiznet.h.

Dependents:   Embedded_web EmailButton EmailButton HTTPClient_Weather ... more

other drivers

for only W5500 / WIZ550io user, you could use

Import libraryW5500Interface

This is the Interface library for WIZnet W5500 chip which forked of EthernetInterfaceW5500, WIZnetInterface and WIZ550ioInterface. This library has simple name as "W5500Interface". and can be used for Wiz550io users also.

Last commit 28 Apr 2015 by W5500-Ethernet-Interface Makers

Diff: WIZnetInterface/Socket/UDPSocket.cpp

Revision:
5:89edb39d8707
Parent:
0:b72d22e10709
--- a/WIZnetInterface/Socket/UDPSocket.cpp	Wed Aug 20 02:17:02 2014 +0000
+++ b/WIZnetInterface/Socket/UDPSocket.cpp	Mon Oct 06 01:35:09 2014 +0000
@@ -30,7 +30,7 @@
     if (_sock_fd < 0) {
         _sock_fd = eth->new_socket();
     }
-    if (eth->setProtocol(_sock_fd, UDP) == false) return -1; 
+    if (eth->setProtocol(_sock_fd, UDP) == false) return -1;
     return 0;
 }
 
@@ -78,11 +78,18 @@
     }
     eth->recv(_sock_fd, (char*)info, sizeof(info));
     readEndpoint(remote, info);
-    int udp_size = info[6]<<8|info[7]; 
+    int udp_size = info[6]<<8|info[7];
     //TEST_ASSERT(udp_size <= (size-sizeof(info)));
     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);
 }