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RT_IFA_ADD(9) FreeBSD Kernel Developer's Manual RT_IFA_ADD(9) NAME rt_ifa_add, rt_ifa_del, rt_ifa_addlocal, rt_ifa_dellocal - add or delete routing entries associated with an address SYNOPSIS #include <sys/types.h> #include <sys/socket.h> #include <net/if.h> #include <net/route.h> int rt_ifa_add(struct ifaddr *ifa, int flags, struct sockaddr *dst, unsigned int rdomain); int rt_ifa_del(struct ifaddr *ifa, int flags, struct sockaddr *dst, unsigned int rdomain); int rt_ifa_addlocal(struct ifaddr *ifa); int rt_ifa_dellocal(struct ifaddr *ifa); DESCRIPTION These functions create and delete routing entries required by the network stack and managed by the kernel. rt_ifa_add() Creates and associates a connected routing entry with ifa in the routing domain specified by rdomain. Connected routing entries represent routes to prefixes and should be created with RTF_CLONING in flags and the address of ifa in dst. But for Point-to-Point interfaces, connected routing entries represent routes to hosts and should be created with RTF_HOST in flags and the destination address in dst. Connected routing entries have a priority of RTP_CONNECTED. rt_ifa_del() Removes the connected routing entry associated with ifa in the routing domain specified by rdomain. rt_ifa_addlocal() Creates and associates a local routing entry with ifa. Local routing entries are used to not send packets destined to a local address on the wire and instead redirect them to lo(4). They have the lowest priority available, RTP_LOCAL, and contain a special flag, RTF_LOCAL, that can be checked to determine if the address is configured on the system. rt_ifa_dellocal() Removes the local routing entry associated with ifa. CONTEXT rt_ifa_add(), rt_ifa_del(), rt_ifa_addlocal(), and rt_ifa_dellocal() can be called during autoconf, from process context, or from interrupt context. RETURN VALUES rt_ifa_add(), rt_ifa_del(), rt_ifa_addlocal(), and rt_ifa_dellocal() will return 0 on success and the return value of rtrequest(9) otherwise. SEE ALSO lo(4), route(4), rtrequest(9) FreeBSD 14.1-RELEASE-p8 February 13, 2019 FreeBSD 14.1-RELEASE-p8