void
uninstall_route(struct babel_route *route)
{
if(!route->installed)
return;
route->installed = 0;
kuninstall_route(route);
local_notify_route(route, LOCAL_CHANGE);
}
void
flush_route(struct route *route)
{
int i;
struct source *src;
unsigned oldmetric;
int lost = 0;
oldmetric = route_metric(route);
src = route->src;
if(route->installed) {
uninstall_route(route);
lost = 1;
}
i = find_route_slot(route->src->prefix, route->src->plen, NULL);
assert(i >= 0 && i < route_slots);
local_notify_route(route, LOCAL_FLUSH);
if(route == routes[i]) {
routes[i] = route->next;
route->next = NULL;
free(route);
if(routes[i] == NULL) {
if(i < route_slots - 1)
memmove(routes + i, routes + i + 1,
(route_slots - i - 1) * sizeof(struct route*));
routes[route_slots - 1] = NULL;
route_slots--;
}
if(route_slots == 0)
resize_route_table(0);
else if(max_route_slots > 8 && route_slots < max_route_slots / 4)
resize_route_table(max_route_slots / 2);
} else {
struct route *r = routes[i];
while(r->next != route)
r = r->next;
r->next = route->next;
route->next = NULL;
free(route);
}
if(lost)
route_lost(src, oldmetric);
release_source(src);
}
void
uninstall_route(struct route *route)
{
int rc;
if(!route->installed)
return;
rc = kernel_route(ROUTE_FLUSH, route->src->prefix, route->src->plen,
route->nexthop,
route->neigh->ifp->ifindex,
metric_to_kernel(route_metric(route)), NULL, 0, 0);
if(rc < 0)
perror("kernel_route(FLUSH)");
route->installed = 0;
local_notify_route(route, LOCAL_CHANGE);
}
void
install_route(struct route *route)
{
int i, rc;
if(route->installed)
return;
if(!route_feasible(route))
fprintf(stderr, "WARNING: installing unfeasible route "
"(this shouldn't happen).");
i = find_route_slot(route->src->prefix, route->src->plen, NULL);
assert(i >= 0 && i < route_slots);
if(routes[i] != route && routes[i]->installed) {
fprintf(stderr, "WARNING: attempting to install duplicate route "
"(this shouldn't happen).");
return;
}
rc = kernel_route(ROUTE_ADD, route->src->prefix, route->src->plen,
route->nexthop,
route->neigh->ifp->ifindex,
metric_to_kernel(route_metric(route)), NULL, 0, 0);
if(rc < 0) {
int save = errno;
perror("kernel_route(ADD)");
if(save != EEXIST)
return;
}
route->installed = 1;
move_installed_route(route, i);
local_notify_route(route, LOCAL_CHANGE);
}