Andrew Boyson / net

A stack which works with or without an Mbed os library. Provides IPv4 or IPv6 with a full 1500 byte buffer.

Dependents:   oldheating gps motorhome heating

Diff: ip4/ip4.cpp

Revision:
15:6ca6778168b1
Parent:
14:e75a59c1123d
Child:
18:accfcb80d9c3
--- a/ip4/ip4.cpp	Fri May 05 17:44:16 2017 +0000
+++ b/ip4/ip4.cpp	Tue May 09 15:39:03 2017 +0000
@@ -150,10 +150,23 @@
     readHeader(pHeader);
     
     bool isMe        = Ip4Dst == DhcpLocalIp;
+    bool isLocalBroadcast = Ip4Dst == DhcpLocalIp | 0xFF000000;
     bool isBroadcast = Ip4Dst == IP4_BROADCAST_ADDRESS;
     bool isMulticast = (Ip4Dst & 0xE0) == 0xE0; //224.x.x.x == 1110 0000 == E0.xx.xx.xx == xx.xx.xx.E0 in little endian
     
-    if (!isMe && !isBroadcast && !isMulticast) return DO_NOTHING;
+    bool doIt = isMe || isLocalBroadcast || isBroadcast || isMulticast;
+    if (!doIt)
+    {
+        if (DEBUG)
+        {
+            char text[20];
+            Ip4AddressToString(Ip4Dst, sizeof(text), text);
+            LogTimeF("IP4 filtered out ip %s ", text);
+            Ip4AddressToString(Ip4Src, sizeof(text), text);
+            LogF("from %s \r\n", text);
+        }
+        return DO_NOTHING;
+    }
     
     ArAdd4(pSrcMac, Ip4Src);