sysctl_tcp_stdurg 147 include/net/netns/ipv4.h int sysctl_tcp_stdurg; sysctl_tcp_stdurg 1121 net/ipv4/sysctl_net_ipv4.c .data = &init_net.ipv4.sysctl_tcp_stdurg, sysctl_tcp_stdurg 5313 net/ipv4/tcp_input.c if (ptr && !sock_net(sk)->ipv4.sysctl_tcp_stdurg)