FLAG_ECE
#define FLAG_CA_ALERT (FLAG_DATA_SACKED|FLAG_ECE|FLAG_DSACKING_ACK)
if (flag & FLAG_ECE)
tcp_add_reno_sack(sk, num_dupack, flag & FLAG_ECE);
bool ece_ack = flag & FLAG_ECE;
if (flag & FLAG_ECE)
if (flag & FLAG_ECE) {
flag |= FLAG_ECE;
flag & FLAG_ECE);
&sack_state, flag & FLAG_ECE);
*flag |= FLAG_ECE;