1RTF_UP = 0x1 2RTF_GATEWAY = 0x2 3RTF_HOST = 0x4 4RTF_REJECT = 0x8 5RTF_DYNAMIC = 0x10 6RTF_MODIFIED = 0x20 7RTF_DONE = 0x40 8RTF_DELCLONE = 0x80 9RTF_CLONING = 0x100 10RTF_XRESOLVE = 0x200 11RTF_LLINFO = 0x400 12RTF_STATIC = 0x800 13RTF_BLACKHOLE = 0x1000 14RTF_PROTO2 = 0x4000 15RTF_PROTO1 = 0x8000 16RTF_PRCLONING = 0x10000 17RTF_WASCLONED = 0x20000 18RTF_PROTO3 = 0x40000 19RTF_PINNED = 0x100000 20RTF_LOCAL = 0x200000 21RTF_BROADCAST = 0x400000 22RTF_MULTICAST = 0x800000 23RTF_IFSCOPE = 0x1000000 24RTF_CONDEMNED = 0x2000000 25RTF_IFREF = 0x4000000 26RTF_PROXY = 0x8000000 27RTF_ROUTER = 0x10000000 28