taglinefilesource code
RTF_WINDOW467net/ipv4/route.cif (!(flags & RTF_WINDOW))
RTF_WINDOW3088net/ipv4/tcp.cif(rt!=NULL && (rt->rt_flags&RTF_WINDOW))
RTF_WINDOW4624net/ipv4/tcp.cif(rt!=NULL && (rt->rt_flags&RTF_WINDOW))