sysctl_tcp_frto 155 include/net/netns/ipv4.h int sysctl_tcp_frto; sysctl_tcp_frto 1179 net/ipv4/sysctl_net_ipv4.c .data = &init_net.ipv4.sysctl_tcp_frto, sysctl_tcp_frto 2027 net/ipv4/tcp_input.c tp->frto = net->ipv4.sysctl_tcp_frto && sysctl_tcp_frto 2697 net/ipv4/tcp_ipv4.c net->ipv4.sysctl_tcp_frto = 2;