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https://gitlab.nic.cz/labs/bird.git
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50d8424ad1
intended to serve as an example of interface pattern list use. As a side effect, you can disable generating of device routes by disabling this protocol.
110 lines
2.3 KiB
C
110 lines
2.3 KiB
C
/*
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* BIRD -- Direct Device Routes
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*
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* (c) 1998 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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#define LOCAL_DEBUG
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#include <string.h>
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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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struct proto *cf_dev_proto;
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static void
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dev_if_notify(struct proto *p, unsigned c, struct iface *old, struct iface *new)
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{
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struct rt_dev_proto *P = (void *) p;
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if (old && !iface_patt_match(&P->iface_list, old) ||
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new && !iface_patt_match(&P->iface_list, new))
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return;
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if (c & IF_CHANGE_DOWN)
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{
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net *n;
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debug("dev_if_notify: %s going down\n", old->name);
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n = net_find(&master_table, 0, old->prefix, old->pxlen);
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if (!n)
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{
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debug("dev_if_notify: device shutdown: prefix not found\n");
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return;
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}
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rte_update(n, p, NULL);
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}
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else if (c & IF_CHANGE_UP)
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{
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rta *a, A;
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net *n;
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rte *e;
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debug("dev_if_notify: %s going up\n", new->name);
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bzero(&A, sizeof(A));
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A.proto = p;
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A.source = RTS_DEVICE;
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A.scope = (new->flags & IF_LOOPBACK) ? SCOPE_HOST : SCOPE_UNIVERSE;
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A.cast = RTC_UNICAST;
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A.dest = RTD_DEVICE;
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A.iface = new;
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A.attrs = NULL;
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a = rta_lookup(&A);
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if (new->flags & IF_UNNUMBERED)
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n = net_get(&master_table, 0, new->opposite, new->pxlen);
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else
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n = net_get(&master_table, 0, new->prefix, new->pxlen);
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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_update(n, p, e);
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}
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}
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static void
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dev_start(struct proto *p)
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{
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}
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static void
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dev_init(struct protocol *p)
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{
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}
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static void
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dev_preconfig(struct protocol *x)
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{
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struct rt_dev_proto *P = proto_new(&proto_device, sizeof(struct rt_dev_proto));
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struct proto *p = &P->p;
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struct iface_patt *k = cfg_alloc(sizeof(struct iface_patt));
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cf_dev_proto = p;
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p->preference = DEF_PREF_DIRECT;
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p->start = dev_start;
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p->if_notify = dev_if_notify;
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init_list(&P->iface_list);
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k->pattern = "*";
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add_tail(&P->iface_list, &k->n);
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}
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static void
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dev_postconfig(struct protocol *p)
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{
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}
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struct protocol proto_device = {
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{ NULL, NULL },
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"Device",
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0,
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dev_init,
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dev_preconfig,
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dev_postconfig
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};
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