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authorOndrej Zajicek <santiago@crfreenet.org>2010-03-26 18:53:31 +0100
committerOndrej Zajicek <santiago@crfreenet.org>2010-03-26 18:53:31 +0100
commiteb0f129fcedcecbee85403095abad8f59b82683c (patch)
tree562179cf65bcdcfe1fc2ea42b401ddce620de350 /proto/ospf/iface.c
parentb1c030b0ba59eed6da5271ed592d6b93ed088518 (diff)
parent48cff379a718998cd984d60fb6f8b48cb961c0f1 (diff)
downloadbird-eb0f129fcedcecbee85403095abad8f59b82683c.tar
bird-eb0f129fcedcecbee85403095abad8f59b82683c.zip
Merge branch 'socket2' into new
Diffstat (limited to 'proto/ospf/iface.c')
-rw-r--r--proto/ospf/iface.c477
1 files changed, 323 insertions, 154 deletions
diff --git a/proto/ospf/iface.c b/proto/ospf/iface.c
index 927b8da..83d591b 100644
--- a/proto/ospf/iface.c
+++ b/proto/ospf/iface.c
@@ -21,7 +21,6 @@ char *ospf_it[] = { "broadcast", "nbma", "point-to-point", "virtual link" };
static void
poll_timer_hook(timer * timer)
{
- log("POLL!");
ospf_hello_send(timer, 1, NULL);
}
@@ -58,63 +57,128 @@ rxbufsize(struct ospf_iface *ifa)
}
}
-static sock *
-ospf_open_socket(struct ospf_iface *ifa, int mc)
+static int
+ospf_sk_open(struct ospf_iface *ifa)
{
- sock *ipsk;
+ sock *sk;
struct proto *p = &ifa->oa->po->proto;
- ipsk = sk_new(p->pool);
- ipsk->type = SK_IP;
- ipsk->dport = OSPF_PROTO;
+ sk = sk_new(p->pool);
+ sk->type = SK_IP;
+ sk->dport = OSPF_PROTO;
#ifdef OSPFv2
/*
* In Linux IPv4, binding a raw socket to an IP address of an iface causes
* that the socket does not receive multicast packets, as they have
* different (multicast) destination IP address.
- *
- * We want such filter in the vlink (non-mc) socket.
*/
- ipsk->saddr = mc ? IPA_NONE : ifa->iface->addr->ip;
+ sk->saddr = IPA_NONE;
#else /* OSPFv3 */
- ipsk->saddr = ifa->lladdr;
+ sk->saddr = ifa->addr->ip; /* link-local addr */
#endif
- ipsk->tos = IP_PREC_INTERNET_CONTROL;
- ipsk->ttl = 1;
- if (ifa->type == OSPF_IT_VLINK)
- ipsk->ttl = 255;
- ipsk->rx_hook = ospf_rx_hook;
- ipsk->tx_hook = ospf_tx_hook;
- ipsk->err_hook = ospf_err_hook;
- ipsk->iface = ifa->iface;
- ipsk->rbsize = rxbufsize(ifa);
- ipsk->tbsize = ifa->iface->mtu;
- ipsk->data = (void *) ifa;
- if (sk_open(ipsk) != 0)
+ sk->tos = IP_PREC_INTERNET_CONTROL;
+ sk->rx_hook = ospf_rx_hook;
+ sk->tx_hook = ospf_tx_hook;
+ sk->err_hook = ospf_err_hook;
+ sk->iface = ifa->iface;
+ sk->rbsize = rxbufsize(ifa);
+ sk->tbsize = ifa->iface->mtu;
+ sk->data = (void *) ifa;
+ sk->flags = SKF_LADDR_RX;
+
+ if (sk_open(sk) != 0)
goto err;
#ifdef OSPFv3
/* 12 is an offset of the checksum in an OSPF packet */
- if (sk_set_ipv6_checksum(ipsk, 12) < 0)
+ if (sk_set_ipv6_checksum(sk, 12) < 0)
goto err;
#endif
- if (mc)
- {
- if (sk_setup_multicast(ipsk) < 0)
- goto err;
+ /*
+ * For OSPFv2: When sending a packet, it is important to have a
+ * proper source address. We expect that when we send one-hop
+ * unicast packets, OS chooses a source address according to the
+ * destination address (to be in the same prefix). We also expect
+ * that when we send multicast packets, OS uses the source address
+ * from sk->saddr registered to OS by sk_setup_multicast(). This
+ * behavior is needed to implement multiple virtual ifaces (struct
+ * ospf_iface) on one physical iface and is signalized by
+ * CONFIG_MC_PROPER_SRC.
+ *
+ * If this behavior is not available (for example on BSD), we create
+ * non-stub iface just for the primary IP address (see
+ * ospf_iface_stubby()) and we expect OS to use primary IP address
+ * as a source address for both unicast and multicast packets.
+ *
+ * FIXME: the primary IP address is currently just the
+ * lexicographically smallest address on an interface, it should be
+ * signalized by sysdep code which one is really the primary.
+ */
- if (sk_join_group(ipsk, AllSPFRouters) < 0)
- goto err;
- }
+ sk->saddr = ifa->addr->ip;
+ if (sk_setup_multicast(sk) < 0)
+ goto err;
- return ipsk;
+ ifa->sk = sk;
+ ifa->sk_spf = 0;
+ ifa->sk_dr = 0;
+ return 1;
err:
- rfree(ipsk);
- return NULL;
+ rfree(sk);
+ return 0;
+}
+
+static inline void
+ospf_sk_join_spf(struct ospf_iface *ifa)
+{
+ if (ifa->sk_spf)
+ return;
+
+ sk_join_group(ifa->sk, AllSPFRouters);
+ ifa->sk_spf = 1;
+}
+
+static inline void
+ospf_sk_join_dr(struct ospf_iface *ifa)
+{
+ if (ifa->sk_dr)
+ return;
+
+ sk_join_group(ifa->sk, AllDRouters);
+ ifa->sk_dr = 1;
+}
+
+static inline void
+ospf_sk_leave_spf(struct ospf_iface *ifa)
+{
+ if (!ifa->sk_spf)
+ return;
+
+ sk_leave_group(ifa->sk, AllSPFRouters);
+ ifa->sk_spf = 0;
+}
+
+static inline void
+ospf_sk_leave_dr(struct ospf_iface *ifa)
+{
+ if (!ifa->sk_dr)
+ return;
+
+ sk_leave_group(ifa->sk, AllDRouters);
+ ifa->sk_dr = 0;
+}
+
+static inline void
+ospf_sk_close(struct ospf_iface *ifa)
+{
+ ASSERT(ifa->sk);
+
+ rfree(ifa->sk);
+ ifa->sk = NULL;
}
@@ -143,10 +207,6 @@ ospf_iface_chstate(struct ospf_iface *ifa, u8 state)
OSPF_TRACE(D_EVENTS,
"Changing state of virtual link %R from \"%s\" into \"%s\".",
ifa->vid, ospf_is[oldstate], ospf_is[state]);
- if (state == OSPF_IS_PTP)
- {
- ifa->sk = ospf_open_socket(ifa, 0);
- }
}
else
{
@@ -157,19 +217,10 @@ ospf_iface_chstate(struct ospf_iface *ifa, u8 state)
{
if ((ifa->type != OSPF_IT_NBMA) && (ifa->ioprob == OSPF_I_OK) &&
((state == OSPF_IS_BACKUP) || (state == OSPF_IS_DR)))
- {
- if (!ifa->dr_up == 0)
- {
- /* FIXME some error handing ? */
- sk_join_group(ifa->sk, AllDRouters);
- ifa->dr_up = 1;
- }
- }
- else if (ifa->dr_up)
- {
- sk_leave_group(ifa->sk, AllDRouters);
- ifa->dr_up = 0;
- }
+ ospf_sk_join_dr(ifa);
+ else
+ ospf_sk_leave_dr(ifa);
+
if ((oldstate == OSPF_IS_DR) && (ifa->net_lsa != NULL))
{
ifa->net_lsa->lsa.age = LSA_MAXAGE;
@@ -182,6 +233,7 @@ ospf_iface_chstate(struct ospf_iface *ifa, u8 state)
ifa->net_lsa = NULL;
}
}
+ // FIXME flushling of link LSA
}
}
}
@@ -194,13 +246,15 @@ ospf_iface_down(struct ospf_iface *ifa)
struct proto *p = &po->proto;
struct ospf_iface *iff;
+ OSPF_TRACE(D_EVENTS, "Removing interface %s", ifa->iface->name);
+
/* First of all kill all the related vlinks */
if (ifa->type != OSPF_IT_VLINK)
{
WALK_LIST(iff, po->iface_list)
{
- if ((iff->type == OSPF_IT_VLINK) && (iff->iface == ifa->iface))
- ospf_iface_down(iff);
+ if ((iff->type == OSPF_IT_VLINK) && (iff->vifa == ifa))
+ ospf_iface_sm(iff, ISM_DOWN);
}
}
@@ -210,16 +264,18 @@ ospf_iface_down(struct ospf_iface *ifa)
ospf_neigh_remove(n);
}
- rfree(ifa->sk);
- ifa->sk = NULL;
-
if (ifa->type == OSPF_IT_VLINK)
{
+ ifa->vifa = NULL;
ifa->iface = NULL;
+ ifa->addr = NULL;
+ ifa->sk = NULL;
+ ifa->vip = IPA_NONE;
return;
}
else
{
+ ospf_sk_close(ifa);
rfree(ifa->wait_timer);
rfree(ifa->hello_timer);
rfree(ifa->poll_timer);
@@ -294,18 +350,16 @@ ospf_iface_sm(struct ospf_iface *ifa, int event)
case ISM_DOWN:
ospf_iface_chstate(ifa, OSPF_IS_DOWN);
ospf_iface_down(ifa);
- schedule_link_lsa(ifa);
schedule_rt_lsa(oa);
break;
- case ISM_LOOP: /* Useless? */
+ /*
+ case ISM_LOOP:
ospf_iface_chstate(ifa, OSPF_IS_LOOP);
- ospf_iface_down(ifa);
- schedule_rt_lsa(ifa->oa);
break;
case ISM_UNLOOP:
ospf_iface_chstate(ifa, OSPF_IS_DOWN);
- schedule_rt_lsa(ifa->oa);
break;
+ */
default:
bug("OSPF_I_SM - Unknown event?");
break;
@@ -313,49 +367,10 @@ ospf_iface_sm(struct ospf_iface *ifa, int event)
}
-#if 0
-static sock *
-ospf_open_mc_socket(struct ospf_iface *ifa)
-{
- sock *mcsk;
- struct proto *p = &ifa->oa->po->proto;
-
- mcsk = sk_new(p->pool);
- mcsk->type = SK_IP_MC;
- mcsk->sport = 0;
- mcsk->dport = OSPF_PROTO;
-
-#ifdef OSPFv2
- mcsk->saddr = AllSPFRouters;
-#else /* OSPFv3 */
- // mcsk->saddr = AllSPFRouters;
- mcsk->saddr = ifa->lladdr;
-#endif
-
- mcsk->daddr = AllSPFRouters;
- mcsk->tos = IP_PREC_INTERNET_CONTROL;
- mcsk->ttl = 1;
- mcsk->rx_hook = ospf_rx_hook;
- mcsk->tx_hook = ospf_tx_hook;
- mcsk->err_hook = ospf_err_hook;
- mcsk->iface = ifa->iface;
- mcsk->rbsize = rxbufsize(ifa);
- mcsk->tbsize = ifa->iface->mtu;
- mcsk->data = (void *) ifa;
- if (sk_open(mcsk) != 0)
- {
- DBG("%s: SK_OPEN: mc open failed.\n", p->name);
- return (NULL);
- }
- DBG("%s: SK_OPEN: mc opened.\n", p->name);
- return (mcsk);
-}
-#endif
-
u8
-ospf_iface_clasify(struct iface * ifa)
+ospf_iface_clasify(struct iface *ifa, struct ifa *addr)
{
- if (ifa->addr->flags & IA_UNNUMBERED)
+ if (addr->flags & IA_UNNUMBERED)
return OSPF_IT_PTP;
if ((ifa->flags & (IF_MULTIACCESS | IF_MULTICAST)) ==
@@ -384,20 +399,19 @@ ospf_iface_add(struct object_lock *lock)
struct ospf_iface *ifa = lock->data;
struct proto_ospf *po = ifa->oa->po;
struct proto *p = &po->proto;
- struct iface *iface = lock->iface;
ifa->lock = lock;
- ifa->ioprob = OSPF_I_OK;
-
- ifa->sk = ospf_open_socket(ifa, ifa->type != OSPF_IT_NBMA);
- if (ifa->sk == NULL)
+ if (ospf_sk_open(ifa))
+ {
+ if (ifa->type != OSPF_IT_NBMA)
+ ospf_sk_join_spf(ifa);
+ }
+ else
{
- log("%s: Huh? could not open ip socket on interface %s?", p->name,
- iface->name);
- log("%s: Declaring as stub.", p->name);
+ log(L_ERR "%s: Socket open failed on interface %s, declaring as stub", p->name, ifa->iface->name);
+ ifa->ioprob = OSPF_I_SK;
ifa->stub = 1;
- ifa->ioprob += OSPF_I_IP;
}
ifa->state = OSPF_IS_DOWN;
@@ -405,7 +419,7 @@ ospf_iface_add(struct object_lock *lock)
}
void
-ospf_iface_new(struct proto_ospf *po, struct iface *iface,
+ospf_iface_new(struct proto_ospf *po, struct iface *iface, struct ifa *addr,
struct ospf_area_config *ac, struct ospf_iface_patt *ip)
{
struct proto *p = &po->proto;
@@ -414,8 +428,12 @@ ospf_iface_new(struct proto_ospf *po, struct iface *iface,
struct object_lock *lock;
struct ospf_area *oa;
+ if (ip->type != OSPF_IT_VLINK)
+ OSPF_TRACE(D_EVENTS, "Adding interface %s", iface->name);
+
ifa = mb_allocz(p->pool, sizeof(struct ospf_iface));
ifa->iface = iface;
+ ifa->addr = addr;
ifa->cost = ip->cost;
ifa->rxmtint = ip->rxmtint;
@@ -426,7 +444,9 @@ ospf_iface_new(struct proto_ospf *po, struct iface *iface,
ifa->strictnbma = ip->strictnbma;
ifa->waitint = ip->waitint;
ifa->dead = (ip->dead == 0) ? ip->deadc * ifa->helloint : ip->dead;
- ifa->stub = ip->stub;
+ ifa->stub = ospf_iface_stubby(ip, addr);
+ ifa->ioprob = OSPF_I_OK;
+ ifa->rxbuf = ip->rxbuf;
#ifdef OSPFv2
ifa->autype = ip->autype;
@@ -436,34 +456,36 @@ ospf_iface_new(struct proto_ospf *po, struct iface *iface,
#ifdef OSPFv3
ifa->instance_id = ip->instance_id;
- ifa->lladdr = IPA_NONE;
-
- /* Find link-local address */
+ /*
+ addr = NULL;
if (ifa->type != OSPF_IT_VLINK)
{
struct ifa *a;
WALK_LIST(a, iface->addrs)
if (a->scope == SCOPE_LINK)
{
- ifa->lladdr = a->ip;
+ addr = a;
break;
}
- if (! ipa_nonzero(ifa->lladdr))
- log(L_WARN "%s: Missing link local address on interface %s", p->name, iface->name);
+ if (!addr)
+ {
+ log(L_ERR "%s: Missing link-local address on interface %s, declaring as stub", p->name, iface->name);
+ ifa->ioprob = OSPF_I_LL;
+ ifa->stub = 1;
+ }
}
+ */
#endif
- ifa->rxbuf = ip->rxbuf;
-
if (ip->type == OSPF_IT_UNDEF)
- ifa->type = ospf_iface_clasify(ifa->iface);
+ ifa->type = ospf_iface_clasify(iface, addr);
else
ifa->type = ip->type;
#ifdef OSPFv2
if ((ifa->type != OSPF_IT_PTP) && (ifa->type != OSPF_IT_VLINK) &&
- (ifa->iface->addr->flags & IA_UNNUMBERED))
+ (addr->flags & IA_UNNUMBERED))
{
log(L_WARN "%s: Missing proper IP prefix on interface %s, forcing point-to-point mode",
p->name, iface->name);
@@ -533,8 +555,19 @@ ospf_iface_new(struct proto_ospf *po, struct iface *iface,
return; /* Don't lock, don't add sockets */
}
+ /*
+ * In some cases we allow more ospf_ifaces on one physical iface.
+ * In OSPFv2, if they use different IP address prefix.
+ * In OSPFv3, if they use different instance_id.
+ * Therefore, we store such info to lock->addr field.
+ */
+
lock = olock_new(p->pool);
- lock->addr = AllSPFRouters;
+#ifdef OSPFv2
+ lock->addr = ifa->addr->prefix;
+#else /* OSPFv3 */
+ lock->addr = _MI(0,0,0,ifa->instance_id);
+#endif
lock->type = OBJLOCK_IP;
lock->port = OSPF_PROTO;
lock->iface = iface;
@@ -544,6 +577,150 @@ ospf_iface_new(struct proto_ospf *po, struct iface *iface,
olock_acquire(lock);
}
+
+#ifdef OSPFv2
+
+void
+ospf_ifa_notify(struct proto *p, unsigned flags, struct ifa *a)
+{
+ struct proto_ospf *po = (struct proto_ospf *) p;
+ struct ospf_config *cf = (struct ospf_config *) (p->cf);
+
+ if (a->flags & IA_SECONDARY)
+ return;
+
+ if (a->scope <= SCOPE_LINK)
+ return;
+
+ /* In OSPFv2, we create OSPF iface for each address. */
+ if (flags & IF_CHANGE_UP)
+ {
+ int done = 0;
+ struct ospf_area_config *ac;
+ WALK_LIST(ac, cf->area_list)
+ {
+ struct ospf_iface_patt *ip = (struct ospf_iface_patt *)
+ iface_patt_find(&ac->patt_list, a->iface, a);
+
+ if (ip)
+ {
+ if (!done)
+ ospf_iface_new(po, a->iface, a, ac, ip);
+ done++;
+ }
+ }
+
+ if (done > 1)
+ log(L_WARN "%s: Interface %s (IP %I) matches for multiple areas", p->name, a->iface->name, a->ip);
+ }
+
+ if (flags & IF_CHANGE_DOWN)
+ {
+ struct ospf_iface *ifa, *ifx;
+ WALK_LIST_DELSAFE(ifa, ifx, po->iface_list)
+ {
+ if ((ifa->type != OSPF_IT_VLINK) && (ifa->addr == a))
+ ospf_iface_sm(ifa, ISM_DOWN);
+ /* See a note in ospf_iface_notify() */
+ }
+ }
+}
+
+#else /* OSPFv3 */
+
+static inline int iflag_test(u32 *a, u8 i)
+{
+ return a[i / 32] & (1u << (i % 32));
+}
+
+static inline void iflag_set(u32 *a, u8 i)
+{
+ a[i / 32] |= (1u << (i % 32));
+}
+
+void
+ospf_ifa_notify(struct proto *p, unsigned flags, struct ifa *a)
+{
+ struct proto_ospf *po = (struct proto_ospf *) p;
+ struct ospf_config *cf = (struct ospf_config *) (p->cf);
+
+ if (a->flags & IA_SECONDARY)
+ return;
+
+ if (a->scope < SCOPE_LINK)
+ return;
+
+ /* In OSPFv3, we create OSPF iface for link-local address,
+ other addresses are used for link-LSA. */
+ if (a->scope == SCOPE_LINK)
+ {
+ if (flags & IF_CHANGE_UP)
+ {
+ u32 found_all[8] = {};
+ struct ospf_area_config *ac;
+
+ WALK_LIST(ac, cf->area_list)
+ {
+ u32 found_new[8] = {};
+ struct iface_patt *p;
+
+ WALK_LIST(p, ac->patt_list)
+ {
+ if (iface_patt_match(p, i, a))
+ {
+ struct ospf_iface_patt *ip = (struct ospf_iface_patt *) p;
+
+ /* If true, we already assigned that IID and we skip
+ this to implement first-match behavior */
+ if (iflag_test(found_new, ip->instance_id))
+ continue;
+
+ /* If true, we already assigned that in a different area,
+ we log collision */
+ if (iflag_test(found_all, ip->instance_id))
+ {
+ log(L_WARN "%s: Interface %s (IID %d) matches for multiple areas",
+ p->name, a->iface->name, ip->instance_id);
+ continue;
+ }
+
+ iflag_set(found_all, ip->instance_id);
+ iflag_set(found_new, ip->instance_id);
+ ospf_iface_new(po, a->iface, a, ac, ip);
+ }
+ }
+ }
+ }
+
+ if (flags & IF_CHANGE_DOWN)
+ {
+ struct ospf_iface *ifa, *ifx;
+ WALK_LIST_DELSAFE(ifa, ifx, po->iface_list)
+ {
+ if ((ifa->type != OSPF_IT_VLINK) && (ifa->addr == a))
+ ospf_iface_sm(ifa, ISM_DOWN);
+ /* See a note in ospf_iface_notify() */
+ }
+ }
+ }
+ else
+ {
+ struct ospf_iface *ifa;
+ WALK_LIST(ifa, po->iface_list)
+ {
+ if (ifa->iface == a->iface)
+ {
+ schedule_rt_lsa(ifa->oa);
+ /* Event 5 from RFC5340 4.4.3. */
+ schedule_link_lsa(ifa);
+ return;
+ }
+ }
+ }
+}
+
+#endif
+
void
ospf_iface_change_mtu(struct proto_ospf *po, struct ospf_iface *ifa)
{
@@ -575,44 +752,29 @@ void
ospf_iface_notify(struct proto *p, unsigned flags, struct iface *iface)
{
struct proto_ospf *po = (struct proto_ospf *) p;
- struct ospf_config *c = (struct ospf_config *) (p->cf);
- struct ospf_area_config *ac;
- struct ospf_iface_patt *ip = NULL;
- struct ospf_iface *ifa;
-
+
DBG("%s: If notify called\n", p->name);
if (iface->flags & IF_IGNORE)
return;
- if (flags & IF_CHANGE_UP)
- {
- WALK_LIST(ac, c->area_list)
- {
- if (ip = (struct ospf_iface_patt *)
- iface_patt_find(&ac->patt_list, iface))
- break;
- }
-
- if (ip)
- {
- OSPF_TRACE(D_EVENTS, "Using interface %s.", iface->name);
- ospf_iface_new(po, iface, ac, ip);
- }
- }
-
if (flags & IF_CHANGE_DOWN)
{
- if ((ifa = ospf_iface_find((struct proto_ospf *) p, iface)) != NULL)
- {
- OSPF_TRACE(D_EVENTS, "Killing interface %s.", iface->name);
- ospf_iface_sm(ifa, ISM_DOWN);
- }
+ struct ospf_iface *ifa, *ifx;
+ WALK_LIST_DELSAFE(ifa, ifx, po->iface_list)
+ if ((ifa->type != OSPF_IT_VLINK) && (ifa->iface == iface))
+ ospf_iface_sm(ifa, ISM_DOWN);
+
+ /* We use here that even shutting down iface also shuts down
+ the vlinks, but vlinks are not freed and stays in the
+ iface_list even when down */
}
if (flags & IF_CHANGE_MTU)
{
- if ((ifa = ospf_iface_find((struct proto_ospf *) p, iface)) != NULL)
- ospf_iface_change_mtu(po, ifa);
+ struct ospf_iface *ifa;
+ WALK_LIST(ifa, po->iface_list)
+ if ((ifa->type != OSPF_IT_VLINK) && (ifa->iface == iface))
+ ospf_iface_change_mtu(po, ifa);
}
}
@@ -634,8 +796,14 @@ ospf_iface_info(struct ospf_iface *ifa)
}
else
{
- cli_msg(-1015, "Interface \"%s\":",
- (ifa->iface ? ifa->iface->name : "(none)"));
+#ifdef OSPFv2
+ if (ifa->addr->flags & IA_UNNUMBERED)
+ cli_msg(-1015, "Interface %s (peer %I)", ifa->iface->name, ifa->addr->opposite);
+ else
+ cli_msg(-1015, "Interface %s (%I/%d)", ifa->iface->name, ifa->addr->prefix, ifa->addr->pxlen);
+#else /* OSPFv3 */
+ cli_msg(-1015, "Interface %s (IID %d)", ifa->iface->name, ifa->instance_id);
+#endif
cli_msg(-1015, "\tType: %s %s", ospf_it[ifa->type], strict);
cli_msg(-1015, "\tArea: %R (%u)", ifa->oa->areaid, ifa->oa->areaid);
}
@@ -666,4 +834,5 @@ ospf_iface_shutdown(struct ospf_iface *ifa)
{
init_list(&ifa->neigh_list);
hello_timer_hook(ifa->hello_timer);
+ ospf_sk_close(ifa);
}