func golang.org/x/sys/unix.GetsockoptTCPInfo

2 uses

	golang.org/x/sys/unix (current package)
		syscall_linux.go#L1292: func GetsockoptTCPInfo(fd, level, opt int) (*TCPInfo, error) {

	google.golang.org/grpc/internal/channelz
		types_linux.go#L48: 	if v, err := unix.GetsockoptTCPInfo(int(fd), syscall.SOL_TCP, syscall.TCP_INFO); err == nil {