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-rw-r--r--ospfd/ChangeLog15
-rw-r--r--ospfd/ospf_interface.c28
-rw-r--r--ospfd/ospf_interface.h24
-rw-r--r--ospfd/ospf_packet.c6
-rw-r--r--ospfd/ospf_vty.c15
5 files changed, 66 insertions, 22 deletions
diff --git a/ospfd/ChangeLog b/ospfd/ChangeLog
index 34d7c4df..b7f2c95f 100644
--- a/ospfd/ChangeLog
+++ b/ospfd/ChangeLog
@@ -1,3 +1,18 @@
+2006-06-15 Paul Jakma <paul.jakma@sun.com>
+
+ * ospf_interface.h: (struct ospf_if_info) Add reference counts
+ for multicast group memberships. Add various macros to help
+ manipulate/check membership state.
+ * ospf_interface.c: (ospf_if_set_multicast) Maintain the
+ ospf_if_info reference counts, and only actually drop
+ memberships if it hits 0, to avoid losing membership when
+ OSPF is disabled on an interface with multiple active OSPF
+ interfaces.
+ * ospf_packet.c: (ospf_{hello,read}) Use the new macros to
+ check/set
+ multicast membership.
+ * ospf_vty.c: (show_ip_ospf_interface_sub) ditto.
+
2006-05-31 Paul Jakma <paul.jakma@sun.com>
* ospf_lsdb.c: (ospf_lsdb_delete) robustify against NULL arguments,
diff --git a/ospfd/ospf_interface.c b/ospfd/ospf_interface.c
index b94cfa3a..2c2c0749 100644
--- a/ospfd/ospf_interface.c
+++ b/ospfd/ospf_interface.c
@@ -748,22 +748,25 @@ ospf_if_set_multicast(struct ospf_interface *oi)
(OSPF_IF_PARAM(oi, passive_interface) == OSPF_IF_ACTIVE))
{
/* The interface should belong to the OSPF-all-routers group. */
- if (!CHECK_FLAG(oi->multicast_memberships, MEMBER_ALLROUTERS) &&
+ if (!OI_MEMBER_CHECK(oi, MEMBER_ALLROUTERS) &&
(ospf_if_add_allspfrouters(oi->ospf, oi->address,
oi->ifp->ifindex) >= 0))
- /* Set the flag only if the system call to join succeeded. */
- SET_FLAG(oi->multicast_memberships, MEMBER_ALLROUTERS);
+ /* Set the flag only if the system call to join succeeded. */
+ OI_MEMBER_JOINED(oi, MEMBER_ALLROUTERS);
}
else
{
/* The interface should NOT belong to the OSPF-all-routers group. */
- if (CHECK_FLAG(oi->multicast_memberships, MEMBER_ALLROUTERS))
+ if (OI_MEMBER_CHECK(oi, MEMBER_ALLROUTERS))
{
- ospf_if_drop_allspfrouters (oi->ospf, oi->address, oi->ifp->ifindex);
+ /* Only actually drop if this is the last reference */
+ if (OI_MEMBER_COUNT(oi, MEMBER_ALLROUTERS) == 1)
+ ospf_if_drop_allspfrouters (oi->ospf, oi->address,
+ oi->ifp->ifindex);
/* Unset the flag regardless of whether the system call to leave
the group succeeded, since it's much safer to assume that
we are not a member. */
- UNSET_FLAG(oi->multicast_memberships, MEMBER_ALLROUTERS);
+ OI_MEMBER_LEFT(oi,MEMBER_ALLROUTERS);
}
}
@@ -773,22 +776,25 @@ ospf_if_set_multicast(struct ospf_interface *oi)
(OSPF_IF_PARAM(oi, passive_interface) == OSPF_IF_ACTIVE))
{
/* The interface should belong to the OSPF-designated-routers group. */
- if (!CHECK_FLAG(oi->multicast_memberships, MEMBER_DROUTERS) &&
+ if (!OI_MEMBER_CHECK(oi, MEMBER_DROUTERS) &&
(ospf_if_add_alldrouters(oi->ospf, oi->address,
oi->ifp->ifindex) >= 0))
/* Set the flag only if the system call to join succeeded. */
- SET_FLAG(oi->multicast_memberships, MEMBER_DROUTERS);
+ OI_MEMBER_JOINED(oi, MEMBER_DROUTERS);
}
else
{
/* The interface should NOT belong to the OSPF-designated-routers group */
- if (CHECK_FLAG(oi->multicast_memberships, MEMBER_DROUTERS))
+ if (OI_MEMBER_CHECK(oi, MEMBER_DROUTERS))
{
- ospf_if_drop_alldrouters(oi->ospf, oi->address, oi->ifp->ifindex);
+ /* drop only if last reference */
+ if (OI_MEMBER_COUNT(oi, MEMBER_DROUTERS) == 1)
+ ospf_if_drop_alldrouters(oi->ospf, oi->address, oi->ifp->ifindex);
+
/* Unset the flag regardless of whether the system call to leave
the group succeeded, since it's much safer to assume that
we are not a member. */
- UNSET_FLAG(oi->multicast_memberships, MEMBER_DROUTERS);
+ OI_MEMBER_LEFT(oi, MEMBER_DROUTERS);
}
}
}
diff --git a/ospfd/ospf_interface.h b/ospfd/ospf_interface.h
index 3c759405..5a825ea5 100644
--- a/ospfd/ospf_interface.h
+++ b/ospfd/ospf_interface.h
@@ -68,11 +68,19 @@ struct ospf_if_params
DECLARE_IF_PARAM (int, auth_type); /* OSPF authentication type */
};
+enum
+{
+ MEMBER_ALLROUTERS = 0,
+ MEMBER_DROUTERS,
+ MEMBER_MAX,
+};
+
struct ospf_if_info
{
struct ospf_if_params *def_params;
struct route_table *params;
struct route_table *oifs;
+ unsigned int membership_counts[MEMBER_MAX]; /* multicast group refcnts */
};
struct ospf_interface;
@@ -132,8 +140,20 @@ struct ospf_interface
/* To which multicast groups do we currently belong? */
u_char multicast_memberships;
-#define MEMBER_ALLROUTERS 0x1
-#define MEMBER_DROUTERS 0x2
+#define OI_MEMBER_FLAG(M) (1 << (M))
+#define OI_MEMBER_COUNT(O,M) (IF_OSPF_IF_INFO(oi->ifp)->membership_counts[(M)])
+#define OI_MEMBER_CHECK(O,M) \
+ (CHECK_FLAG((O)->multicast_memberships, OI_MEMBER_FLAG(M)))
+#define OI_MEMBER_JOINED(O,M) \
+ do { \
+ SET_FLAG ((O)->multicast_memberships, OI_MEMBER_FLAG(M)); \
+ IF_OSPF_IF_INFO((O)->ifp)->membership_counts[(M)]++; \
+ } while (0)
+#define OI_MEMBER_LEFT(O,M) \
+ do { \
+ UNSET_FLAG ((O)->multicast_memberships, OI_MEMBER_FLAG(M)); \
+ IF_OSPF_IF_INFO((O)->ifp)->membership_counts[(M)]--; \
+ } while (0)
struct prefix *address; /* Interface prefix */
struct connected *connected; /* Pointer to connected */
diff --git a/ospfd/ospf_packet.c b/ospfd/ospf_packet.c
index a842ca68..569f2513 100644
--- a/ospfd/ospf_packet.c
+++ b/ospfd/ospf_packet.c
@@ -768,7 +768,7 @@ ospf_hello (struct ip *iph, struct ospf_header *ospfh,
if (iph->ip_dst.s_addr == htonl(OSPF_ALLSPFROUTERS))
{
/* Try to fix multicast membership. */
- SET_FLAG(oi->multicast_memberships, MEMBER_ALLROUTERS);
+ OI_MEMBER_JOINED(oi, MEMBER_ALLROUTERS);
ospf_if_set_multicast(oi);
}
return;
@@ -2390,9 +2390,9 @@ ospf_read (struct thread *thread)
ifp->name, if_flag_dump(ifp->flags));
/* Fix multicast memberships? */
if (iph->ip_dst.s_addr == htonl(OSPF_ALLSPFROUTERS))
- SET_FLAG(oi->multicast_memberships, MEMBER_ALLROUTERS);
+ OI_MEMBER_JOINED(oi, MEMBER_ALLROUTERS);
else if (iph->ip_dst.s_addr == htonl(OSPF_ALLDROUTERS))
- SET_FLAG(oi->multicast_memberships, MEMBER_DROUTERS);
+ OI_MEMBER_JOINED(oi, MEMBER_DROUTERS);
if (oi->multicast_memberships)
ospf_if_set_multicast(oi);
return 0;
diff --git a/ospfd/ospf_vty.c b/ospfd/ospf_vty.c
index 8d6ff31f..10580ab7 100644
--- a/ospfd/ospf_vty.c
+++ b/ospfd/ospf_vty.c
@@ -2811,12 +2811,15 @@ show_ip_ospf_interface_sub (struct vty *vty, struct ospf *ospf,
}
vty_out (vty, " Multicast group memberships:");
- if (CHECK_FLAG(oi->multicast_memberships, MEMBER_ALLROUTERS))
- vty_out (vty, " OSPFAllRouters");
- if (CHECK_FLAG(oi->multicast_memberships, MEMBER_DROUTERS))
- vty_out (vty, " OSPFDesignatedRouters");
- if (!CHECK_FLAG(oi->multicast_memberships,
- MEMBER_ALLROUTERS|MEMBER_DROUTERS))
+ if (OI_MEMBER_CHECK(oi, MEMBER_ALLROUTERS)
+ || OI_MEMBER_CHECK(oi, MEMBER_DROUTERS))
+ {
+ if (OI_MEMBER_CHECK(oi, MEMBER_ALLROUTERS))
+ vty_out (vty, " OSPFAllRouters");
+ if (OI_MEMBER_CHECK(oi, MEMBER_DROUTERS))
+ vty_out (vty, " OSPFDesignatedRouters");
+ }
+ else
vty_out (vty, " <None>");
vty_out (vty, "%s", VTY_NEWLINE);
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-24 18:54:01 +0000