Comment ECN/CWR changes more.

src/decode-tcp.h

@@ -12,13 +12,16 @@
                                                  * (type + len), except EOL and NOP */
 
 /* TCP flags */
+
 #define TH_FIN                               0x01
 #define TH_SYN                               0x02
 #define TH_RST                               0x04
 #define TH_PUSH                              0x08
 #define TH_ACK                               0x10
 #define TH_URG                               0x20
+/** Establish a new connection reducing window */
 #define TH_ECN                               0x40
+/** Echo Congestion flag */
 #define TH_CWR                               0x80
 
 /* tcp option codes */

src/stream-tcp.c

@@ -714,6 +714,7 @@ static int StreamTcpPacketStateSynSent(ThreadVars *tv, Packet *p,
                "toclient":"toserver");
 
     switch (p->tcph->th_flags) {
+        /** \todo what about ECN/CWR here? */
         case TH_SYN:
             SCLogDebug("ssn %p: SYN packet on state SYN_SENT... resent", ssn);
             if (ssn->flags & STREAMTCP_FLAG_4WHS)