From: Samuel Jero <sj323707@ohio.edu>
Date: Wed, 8 Jun 2011 03:07:43 +0000 (-0400)
Subject: Add warning about malformed ACK vectors
X-Git-Url: http://sjero.net/git/?p=dccp2tcp;a=commitdiff_plain;h=291fa6397c5dfb5e7a042cd978bab29d1c2faa45

Add warning about malformed ACK vectors

Linux Implementation will handle them incorrectly. It will count the packet as acked. ccid2.c line 657
---

diff --git a/dccp2tcp.c b/dccp2tcp.c
index 71b7ece..1ab8ed1 100644
--- a/dccp2tcp.c
+++ b/dccp2tcp.c
@@ -620,6 +620,10 @@ unsigned int interp_ack_vect(u_char* hdr)
 				if((*cur & 0xC0)==0x00){ //received packet
 					bp+= (*cur & 0x3F)+1;
 				}
+
+				if(((*cur& 0xF0)!= 0xC0) && ((*cur& 0xF0)!= 0x00) && ((*cur& 0xF0)!= 0x40)){
+					dbgprintf(1, "Warning: Invalid Ack Vector!! (Linux will handle poorly!)\n");
+				}
 				tmp--;
 				cur++;
 			}