frto 231 include/linux/tcp.h frto : 1;/* F-RTO (RFC5682) activated in CA_Loss */ frto 2027 net/ipv4/tcp_input.c tp->frto = net->ipv4.sysctl_tcp_frto && frto 2679 net/ipv4/tcp_input.c if (tp->frto) { /* F-RTO RFC5682 sec 3.1 (sack enhanced version). */ frto 2689 net/ipv4/tcp_input.c tp->frto = 0; /* Step 3.a. loss was real */ frto 2701 net/ipv4/tcp_input.c tp->frto = 0; frto 3563 net/ipv4/tcp_input.c tp->frto = 0;