taglinefilesource code
RTF_DYNAMIC310net/inet/icmp.cip_rt_add((RTF_DYNAMIC | RTF_MODIFIED | RTF_GATEWAY),
RTF_DYNAMIC326net/inet/icmp.cip_rt_add((RTF_DYNAMIC | RTF_MODIFIED | RTF_HOST | RTF_GATEWAY),
RTF_DYNAMIC223net/inet/route.cif (flags & RTF_DYNAMIC)