Diff: main.cpp

Revision:

65:23b17c43aa0f

Parent:

64:677b9713a120

Child:

66:f005b9fdf4d1

--- a/main.cpp	Sun Jun 04 21:16:50 2017 +0000
+++ b/main.cpp	Sun Jun 04 21:26:17 2017 +0000
@@ -621,15 +621,13 @@
 
     // Now we have to recalculate all the header sizes, swap IP address/port source and destination, and do the IP and TCP checksums
 
-    char tempHold[12];
+    char tempHold[12]; // it's 12 long because we later reuse it when building the TCP pseudo-header
     memcpy(tempHold, srcAdr,4);
-    memcpy(tempHold+4, dstAdr,4);
-    memcpy(srcAdr, tempHold+4,4);
+    memcpy(srcAdr, dstAdr,4);
     memcpy(dstAdr, tempHold,4); // swap ip address source/dest
 
     memcpy(tempHold, srctcp,2);
-    memcpy(tempHold+2, dsttcp,2);
-    memcpy(srctcp, tempHold+2,2);
+    memcpy(srctcp, dsttcp,2);
     memcpy(dsttcp, tempHold,2); // swap ip port source/dest
 
     ack = seq + incomingLen; // acknowledge the number of bytes that they sent by adding it to "our" sequence number