/*
* BIRD -- Direct Device Routes
*
- * (c) 1998 Martin Mares <mj@ucw.cz>
+ * (c) 1998--2000 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
-#define LOCAL_DEBUG
+/**
+ * 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 struct proto *dev_proto;
static void
-dev_if_notify(struct proto *p, unsigned c, struct iface *old, struct iface *new)
+dev_ifa_notify(struct proto *P, uint flags, struct ifa *ad)
{
- debug("IF notify %x\n", c);
+ struct rt_dev_proto *p = (void *) P;
+ struct rt_dev_config *cf = (void *) P->cf;
+ struct channel *c;
+ net_addr *net = &ad->prefix;
+
+ if (!EMPTY_LIST(cf->iface_list) &&
+ !iface_patt_find(&cf->iface_list, ad->iface, ad))
+ /* Empty list is automatically treated as "*" */
+ return;
+
+ if (ad->flags & IA_SECONDARY)
+ return;
+
+ if (ad->scope <= SCOPE_LINK)
+ return;
+
+ if (ad->prefix.type == NET_IP4)
+ c = p->ip4_channel;
+ else if (ad->prefix.type == NET_IP6)
+ c = p->ip6_channel;
+ else
+ return;
+
+ if (!c)
+ return;
+
+ /* For IPv6 SADR, replace regular prefix with SADR prefix */
+ if (c->net_type == NET_IP6_SADR)
+ {
+ net = alloca(sizeof(net_addr_ip6_sadr));
+ net_fill_ip6_sadr(net, net6_prefix(&ad->prefix), net6_pxlen(&ad->prefix), IP6_NONE, 0);
+ }
+
+ if (flags & IF_CHANGE_DOWN)
+ {
+ DBG("dev_if_notify: %s:%I going down\n", ad->iface->name, ad->ip);
+
+ /* Use iface ID as local source ID */
+ struct rte_src *src = rt_get_source(P, ad->iface->index);
+ rte_update2(c, net, NULL, src);
+ }
+ else if (flags & IF_CHANGE_UP)
+ {
+ rta *a;
+ rte *e;
+
+ DBG("dev_if_notify: %s:%I going up\n", ad->iface->name, ad->ip);
+
+ if (cf->check_link && !(ad->iface->flags & IF_LINK_UP))
+ return;
+
+ /* Use iface ID as local source ID */
+ struct rte_src *src = rt_get_source(P, ad->iface->index);
+
+ rta a0 = {
+ .src = src,
+ .source = RTS_DEVICE,
+ .scope = SCOPE_UNIVERSE,
+ .dest = RTD_UNICAST,
+ .nh.iface = ad->iface,
+ };
+
+ a = rta_lookup(&a0);
+ e = rte_get_temp(a);
+ e->pflags = 0;
+ rte_update2(c, net, e, src);
+ }
}
static void
-dev_start(struct proto *p)
+dev_if_notify(struct proto *p, uint c, struct iface *iface)
{
+ struct rt_dev_config *cf = (void *) p->cf;
+
+ if (c & (IF_CHANGE_UP | IF_CHANGE_DOWN))
+ return;
+
+ if ((c & IF_CHANGE_LINK) && cf->check_link)
+ {
+ uint ac = (iface->flags & IF_LINK_UP) ? IF_CHANGE_UP : IF_CHANGE_DOWN;
+
+ struct ifa *a;
+ WALK_LIST(a, iface->addrs)
+ dev_ifa_notify(p, ac, a);
+ }
}
static void
-dev_init(struct protocol *p)
+dev_postconfig(struct proto_config *CF)
{
+ struct rt_dev_config *cf = (void *) CF;
+ struct channel_config *ip4, *ip6, *ip6_sadr;
+
+ ip4 = proto_cf_find_channel(CF, NET_IP4);
+ ip6 = proto_cf_find_channel(CF, NET_IP6);
+ ip6_sadr = proto_cf_find_channel(CF, NET_IP6_SADR);
+
+ if (ip6 && ip6_sadr)
+ cf_error("Both ipv6 and ipv6-sadr channels");
+
+ cf->ip4_channel = ip4;
+ cf->ip6_channel = ip6 ?: ip6_sadr;
}
-static void
-dev_preconfig(struct protocol *x)
+static struct proto *
+dev_init(struct proto_config *CF)
+{
+ struct proto *P = proto_new(CF);
+ struct rt_dev_proto *p = (void *) P;
+ struct rt_dev_config *cf = (void *) CF;
+
+ proto_configure_channel(P, &p->ip4_channel, cf->ip4_channel);
+ proto_configure_channel(P, &p->ip6_channel, cf->ip6_channel);
+
+ P->if_notify = dev_if_notify;
+ P->ifa_notify = dev_ifa_notify;
+
+ return P;
+}
+
+static int
+dev_reconfigure(struct proto *P, struct proto_config *CF)
{
- struct proto *p = proto_new(&proto_device, sizeof(struct proto));
+ struct rt_dev_proto *p = (void *) P;
+ struct rt_dev_config *o = (void *) P->cf;
+ struct rt_dev_config *n = (void *) CF;
- dev_proto = p;
- p->preference = DEF_PREF_DIRECT;
- p->start = dev_start;
- p->if_notify = dev_if_notify;
+ if (!iface_patts_equal(&o->iface_list, &n->iface_list, NULL) ||
+ (o->check_link != n->check_link))
+ return 0;
+
+ return
+ proto_configure_channel(P, &p->ip4_channel, n->ip4_channel) &&
+ proto_configure_channel(P, &p->ip6_channel, n->ip6_channel);
+
+ return 1;
}
static void
-dev_postconfig(struct protocol *p)
+dev_copy_config(struct proto_config *dest, struct proto_config *src)
{
+ struct rt_dev_config *d = (void *) dest;
+ struct rt_dev_config *s = (void *) 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));
+
+ d->check_link = s->check_link;
}
struct protocol proto_device = {
- { NULL, NULL },
- "Device",
- 0,
- dev_init,
- dev_preconfig,
- dev_postconfig
+ .name = "Direct",
+ .template = "direct%d",
+ .class = PROTOCOL_DIRECT,
+ .preference = DEF_PREF_DIRECT,
+ .channel_mask = NB_IP | NB_IP6_SADR,
+ .proto_size = sizeof(struct rt_dev_proto),
+ .config_size = sizeof(struct rt_dev_config),
+ .postconfig = dev_postconfig,
+ .init = dev_init,
+ .reconfigure = dev_reconfigure,
+ .copy_config = dev_copy_config
};
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