TH_ECN
{ TH_ECN, 'E' },
#ifndef TH_ECN
TH_ECN, TH_CWR, TH_AE };
TH_ACK, TH_URG, TH_ECN, TH_CWR, TH_AE };
if (tcpflags & TH_ECN)
tcpfm = TH_FLAGS & ~(TH_ECN|TH_CWR);
tcpfm = TH_FLAGS & ~(TH_ECN);
#ifndef TH_ECN
#ifndef TH_ECN
#define TH_ECNALL (TH_ECN|TH_CWR|TH_AE)
if ((tcpflags & ~(TH_ECN|TH_CWR)) == TH_SYN) {
} else if ((tcpflags & ~(TH_ECN|TH_CWR)) ==