/* * BIRD -- Direct Device Routes * * (c) 1998--2000 Martin Mares <mj@ucw.cz> * * Can be freely distributed and used under the terms of the GNU GPL. */ /** * DOC: Direct * * The Direct protocol works by converting all ifa_notify() events it receives * to rte_update() calls for the corresponding network. */ #undef LOCAL_DEBUG #include "nest/bird.h" #include "nest/iface.h" #include "nest/protocol.h" #include "nest/route.h" #include "nest/rt-dev.h" #include "conf/conf.h" #include "lib/resource.h" #include "lib/string.h" static void dev_ifa_notify(struct proto *p, unsigned c, struct ifa *ad) { struct rt_dev_config *P = (void *) p->cf; if (!EMPTY_LIST(P->iface_list) && !iface_patt_find(&P->iface_list, ad->iface, ad->iface->addr)) /* Empty list is automagically treated as "*" */ return; if (ad->flags & IA_SECONDARY) return; if (ad->scope <= SCOPE_LINK) return; if (c & IF_CHANGE_DOWN) { net *n; DBG("dev_if_notify: %s:%I going down\n", ad->iface->name, ad->ip); n = net_find(p->table, ad->prefix, ad->pxlen); if (!n) { DBG("dev_if_notify: device shutdown: prefix not found\n"); return; } rte_update(p->table, n, p, p, NULL); } else if (c & IF_CHANGE_UP) { rta *a, A; net *n; rte *e; DBG("dev_if_notify: %s:%I going up\n", ad->iface->name, ad->ip); bzero(&A, sizeof(A)); A.proto = p; A.source = RTS_DEVICE; A.scope = SCOPE_UNIVERSE; A.cast = RTC_UNICAST; A.dest = RTD_DEVICE; A.iface = ad->iface; A.eattrs = NULL; a = rta_lookup(&A); n = net_get(p->table, ad->prefix, ad->pxlen); e = rte_get_temp(a); e->net = n; e->pflags = 0; rte_update(p->table, n, p, p, e); } } static struct proto * dev_init(struct proto_config *c) { struct proto *p = proto_new(c, sizeof(struct proto)); p->ifa_notify = dev_ifa_notify; return p; } static int dev_reconfigure(struct proto *p, struct proto_config *new) { struct rt_dev_config *o = (struct rt_dev_config *) p->cf; struct rt_dev_config *n = (struct rt_dev_config *) new; return iface_patts_equal(&o->iface_list, &n->iface_list, NULL); } static void dev_copy_config(struct proto_config *dest, struct proto_config *src) { struct rt_dev_config *d = (struct rt_dev_config *) dest; struct rt_dev_config *s = (struct rt_dev_config *) src; /* * We copy iface_list as ifaces can be shared by more direct protocols. * Copy suffices to be is shallow, because new nodes can be added, but * old nodes cannot be modified (although they contain internal lists). */ cfg_copy_list(&d->iface_list, &s->iface_list, sizeof(struct iface_patt)); } struct protocol proto_device = { name: "Direct", template: "direct%d", preference: DEF_PREF_DIRECT, init: dev_init, reconfigure: dev_reconfigure, copy_config: dev_copy_config };