f4a60a9bc4
The patch adds support for channels, structures connecting protocols and tables and handling most interactions between them. The documentation is missing yet.
158 lines
3.7 KiB
C
158 lines
3.7 KiB
C
/*
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* BIRD -- Direct Device Routes
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*
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* (c) 1998--2000 Martin Mares <mj@ucw.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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/**
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* DOC: Direct
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*
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* The Direct protocol works by converting all ifa_notify() events it receives
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* to rte_update() calls for the corresponding network.
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*/
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#undef LOCAL_DEBUG
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#include "nest/bird.h"
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#include "nest/iface.h"
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#include "nest/protocol.h"
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#include "nest/route.h"
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#include "nest/rt-dev.h"
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#include "conf/conf.h"
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#include "lib/resource.h"
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#include "lib/string.h"
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static void
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dev_ifa_notify(struct proto *P, uint flags, struct ifa *ad)
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{
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struct rt_dev_proto *p = (void *) P;
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struct rt_dev_config *cf = (void *) P->cf;
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struct channel *c;
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if (!EMPTY_LIST(cf->iface_list) &&
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!iface_patt_find(&cf->iface_list, ad->iface, ad->iface->addr))
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/* Empty list is automagically treated as "*" */
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return;
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if (ad->flags & IA_SECONDARY)
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return;
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if (ad->scope <= SCOPE_LINK)
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return;
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if (ad->prefix.type == NET_IP4)
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c = p->ip4_channel;
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else if (ad->prefix.type == NET_IP6)
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c = p->ip6_channel;
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else
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return;
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if (!c)
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return;
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if (flags & IF_CHANGE_DOWN)
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{
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net *n;
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DBG("dev_if_notify: %s:%I going down\n", ad->iface->name, ad->ip);
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n = net_find(c->table, &ad->prefix);
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if (!n)
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{
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DBG("dev_if_notify: device shutdown: prefix not found\n");
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return;
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}
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/* Use iface ID as local source ID */
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struct rte_src *src = rt_get_source(P, ad->iface->index);
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rte_update2(c, n, NULL, src);
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}
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else if (flags & IF_CHANGE_UP)
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{
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rta *a;
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net *n;
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rte *e;
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DBG("dev_if_notify: %s:%I going up\n", ad->iface->name, ad->ip);
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/* Use iface ID as local source ID */
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struct rte_src *src = rt_get_source(P, ad->iface->index);
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rta a0 = {
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.src = src,
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.source = RTS_DEVICE,
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.scope = SCOPE_UNIVERSE,
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.cast = RTC_UNICAST,
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.dest = RTD_DEVICE,
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.iface = ad->iface
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};
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a = rta_lookup(&a0);
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n = net_get(c->table, &ad->prefix);
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e = rte_get_temp(a);
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e->net = n;
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e->pflags = 0;
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rte_update2(c, n, e, src);
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}
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}
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static struct proto *
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dev_init(struct proto_config *CF)
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{
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struct proto *P = proto_new(CF);
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struct rt_dev_proto *p = (void *) P;
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// struct rt_dev_config *cf = (void *) CF;
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proto_configure_channel(P, &p->ip4_channel, proto_cf_find_channel(CF, NET_IP4));
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proto_configure_channel(P, &p->ip6_channel, proto_cf_find_channel(CF, NET_IP6));
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P->ifa_notify = dev_ifa_notify;
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return P;
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}
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static int
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dev_reconfigure(struct proto *P, struct proto_config *CF)
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{
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struct rt_dev_proto *p = (void *) P;
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struct rt_dev_config *o = (void *) P->cf;
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struct rt_dev_config *n = (void *) CF;
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if (!iface_patts_equal(&o->iface_list, &n->iface_list, NULL))
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return 0;
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return
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proto_configure_channel(P, &p->ip4_channel, proto_cf_find_channel(CF, NET_IP4)) &&
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proto_configure_channel(P, &p->ip6_channel, proto_cf_find_channel(CF, NET_IP6));
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return 1;
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}
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static void
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dev_copy_config(struct proto_config *dest, struct proto_config *src)
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{
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struct rt_dev_config *d = (void *) dest;
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struct rt_dev_config *s = (void *) src;
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/*
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* We copy iface_list as ifaces can be shared by more direct protocols.
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* Copy suffices to be is shallow, because new nodes can be added, but
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* old nodes cannot be modified (although they contain internal lists).
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*/
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cfg_copy_list(&d->iface_list, &s->iface_list, sizeof(struct iface_patt));
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}
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struct protocol proto_device = {
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.name = "Direct",
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.template = "direct%d",
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.preference = DEF_PREF_DIRECT,
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.channel_mask = NB_IP,
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.proto_size = sizeof(struct rt_dev_proto),
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.config_size = sizeof(struct rt_dev_config),
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.init = dev_init,
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.reconfigure = dev_reconfigure,
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.copy_config = dev_copy_config
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};
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