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git.ipfire.org Git - thirdparty/bird.git/blob - nest/rt-dev.c
2 * BIRD -- Direct Device Routes
4 * (c) 1998--2000 Martin Mares <mj@ucw.cz>
6 * Can be freely distributed and used under the terms of the GNU GPL.
12 * The Direct protocol works by converting all ifa_notify() events it receives
13 * to rte_update() calls for the corresponding network.
18 #include "nest/bird.h"
19 #include "nest/iface.h"
20 #include "nest/protocol.h"
21 #include "nest/route.h"
22 #include "nest/rt-dev.h"
23 #include "conf/conf.h"
24 #include "lib/resource.h"
25 #include "lib/string.h"
29 dev_ifa_notify(struct proto
*P
, uint flags
, struct ifa
*ad
)
31 struct rt_dev_proto
*p
= (void *) P
;
32 struct rt_dev_config
*cf
= (void *) P
->cf
;
35 if (!EMPTY_LIST(cf
->iface_list
) &&
36 !iface_patt_find(&cf
->iface_list
, ad
->iface
, ad
->iface
->addr
))
37 /* Empty list is automatically treated as "*" */
40 if (ad
->flags
& IA_SECONDARY
)
43 if (ad
->scope
<= SCOPE_LINK
)
46 if (ad
->prefix
.type
== NET_IP4
)
48 else if (ad
->prefix
.type
== NET_IP6
)
56 if (flags
& IF_CHANGE_DOWN
)
58 DBG("dev_if_notify: %s:%I going down\n", ad
->iface
->name
, ad
->ip
);
60 /* Use iface ID as local source ID */
61 struct rte_src
*src
= rt_get_source(P
, ad
->iface
->index
);
62 rte_update2(c
, &ad
->prefix
, NULL
, src
);
64 else if (flags
& IF_CHANGE_UP
)
69 DBG("dev_if_notify: %s:%I going up\n", ad
->iface
->name
, ad
->ip
);
71 if (cf
->check_link
&& !(ad
->iface
->flags
& IF_LINK_UP
))
74 /* Use iface ID as local source ID */
75 struct rte_src
*src
= rt_get_source(P
, ad
->iface
->index
);
80 .scope
= SCOPE_UNIVERSE
,
82 .nh
.iface
= ad
->iface
,
88 rte_update2(c
, &ad
->prefix
, e
, src
);
93 dev_if_notify(struct proto
*p
, uint c
, struct iface
*iface
)
95 struct rt_dev_config
*cf
= (void *) p
->cf
;
97 if (c
& (IF_CHANGE_UP
| IF_CHANGE_DOWN
))
100 if ((c
& IF_CHANGE_LINK
) && cf
->check_link
)
102 uint ac
= (iface
->flags
& IF_LINK_UP
) ? IF_CHANGE_UP
: IF_CHANGE_DOWN
;
105 WALK_LIST(a
, iface
->addrs
)
106 dev_ifa_notify(p
, ac
, a
);
111 static struct proto
*
112 dev_init(struct proto_config
*CF
)
114 struct proto
*P
= proto_new(CF
);
115 struct rt_dev_proto
*p
= (void *) P
;
116 // struct rt_dev_config *cf = (void *) CF;
118 proto_configure_channel(P
, &p
->ip4_channel
, proto_cf_find_channel(CF
, NET_IP4
));
119 proto_configure_channel(P
, &p
->ip6_channel
, proto_cf_find_channel(CF
, NET_IP6
));
121 P
->if_notify
= dev_if_notify
;
122 P
->ifa_notify
= dev_ifa_notify
;
128 dev_reconfigure(struct proto
*P
, struct proto_config
*CF
)
130 struct rt_dev_proto
*p
= (void *) P
;
131 struct rt_dev_config
*o
= (void *) P
->cf
;
132 struct rt_dev_config
*n
= (void *) CF
;
134 if (!iface_patts_equal(&o
->iface_list
, &n
->iface_list
, NULL
) ||
135 (o
->check_link
!= n
->check_link
))
139 proto_configure_channel(P
, &p
->ip4_channel
, proto_cf_find_channel(CF
, NET_IP4
)) &&
140 proto_configure_channel(P
, &p
->ip6_channel
, proto_cf_find_channel(CF
, NET_IP6
));
146 dev_copy_config(struct proto_config
*dest
, struct proto_config
*src
)
148 struct rt_dev_config
*d
= (void *) dest
;
149 struct rt_dev_config
*s
= (void *) src
;
152 * We copy iface_list as ifaces can be shared by more direct protocols.
153 * Copy suffices to be is shallow, because new nodes can be added, but
154 * old nodes cannot be modified (although they contain internal lists).
156 cfg_copy_list(&d
->iface_list
, &s
->iface_list
, sizeof(struct iface_patt
));
158 d
->check_link
= s
->check_link
;
161 struct protocol proto_device
= {
163 .template = "direct%d",
164 .preference
= DEF_PREF_DIRECT
,
165 .channel_mask
= NB_IP
,
166 .proto_size
= sizeof(struct rt_dev_proto
),
167 .config_size
= sizeof(struct rt_dev_config
),
169 .reconfigure
= dev_reconfigure
,
170 .copy_config
= dev_copy_config