Symbol: TCPCTL_ALWAYS_KEEPALIVE
regress/sys/nfs/mmap-sysctl-copyin.c
31
int mib[] = { CTL_NET, PF_INET, IPPROTO_TCP, TCPCTL_ALWAYS_KEEPALIVE };
sys/netinet/tcp_usrreq.c
179
{ TCPCTL_ALWAYS_KEEPALIVE, &tcp_always_keepalive, 0, 1 },