157                 const union in_addr_union *prefsrc, /* optional */  in link_address_is_reachable_internal()  argument
179                 if (prefsrc &&  in link_address_is_reachable_internal()
180                     in_addr_is_set(family, prefsrc) &&  in link_address_is_reachable_internal()
181                     in_addr_is_set(family, &route->prefsrc) &&  in link_address_is_reachable_internal()
182                     !in_addr_equal(family, prefsrc, &route->prefsrc))  in link_address_is_reachable_internal()
204                 const union in_addr_union *prefsrc, /* optional */  in link_address_is_reachable()  argument
218         r = link_address_is_reachable_internal(link, family, address, prefsrc, &route);  in link_address_is_reachable()
222         if (!in_addr_is_set(route->family, &route->prefsrc)) {  in link_address_is_reachable()
228         r = link_get_address(link, route->family, &route->prefsrc, 0, &a);  in link_address_is_reachable()
245                 const union in_addr_union *prefsrc, /* optional */  in manager_address_is_reachable()  argument
259                 if (link_address_is_reachable_internal(link, family, address, prefsrc, &route) < 0)  in manager_address_is_reachable()
271         if (!in_addr_is_set(found->family, &found->prefsrc)) {  in manager_address_is_reachable()
277         r = link_get_address(found->link, found->family, &found->prefsrc, 0, &a);  in manager_address_is_reachable()