ospf6d: copy "mtu-ignore" option from ospfd
"mtu-ignore" is an option ospfd used to mimic from the vendor's
implementation, now ospf6d will also implement it.
* ospf6_interface.h: extend ospf6_interface structure by one flag
* ospf6_interface.c: (ipv6_ospf6_mtu_ignore, no_ipv6_ospf6_mtu_ignore):
new declarations; (ospf6_interface_create): show initial value for
consistency; (ospf6_interface_show): print flag status
* ospf6_message.c: (ospf6_dbdesc_recv): consider interface-specific flag
when checking MTU
diff --git a/ospf6d/ospf6_interface.c b/ospf6d/ospf6_interface.c
index cb34745..236baf1 100644
--- a/ospf6d/ospf6_interface.c
+++ b/ospf6d/ospf6_interface.c
@@ -118,6 +118,7 @@
oi->cost = 1;
oi->state = OSPF6_INTERFACE_DOWN;
oi->flag = 0;
+ oi->mtu_ignore = 0;
/* Try to adjust I/O buffer size with IfMtu */
oi->ifmtu = ifp->mtu6;
@@ -784,6 +785,8 @@
{
vty_out (vty, " Instance ID %d, Interface MTU %d (autodetect: %d)%s",
oi->instance_id, oi->ifmtu, ifp->mtu6, VNL);
+ vty_out (vty, " MTU mismatch detection: %s%s", oi->mtu_ignore ?
+ "disabled" : "enabled", VNL);
inet_ntop (AF_INET, &oi->area->area_id,
strbuf, sizeof (strbuf));
vty_out (vty, " Area ID %s, Cost %hu%s", strbuf, oi->cost,
@@ -1368,6 +1371,55 @@
return CMD_SUCCESS;
}
+DEFUN (ipv6_ospf6_mtu_ignore,
+ ipv6_ospf6_mtu_ignore_cmd,
+ "ipv6 ospf6 mtu-ignore",
+ IP6_STR
+ OSPF6_STR
+ "Ignore MTU mismatch on this interface\n"
+ )
+{
+ struct ospf6_interface *oi;
+ struct interface *ifp;
+
+ ifp = (struct interface *) vty->index;
+ assert (ifp);
+
+ oi = (struct ospf6_interface *) ifp->info;
+ if (oi == NULL)
+ oi = ospf6_interface_create (ifp);
+ assert (oi);
+
+ oi->mtu_ignore = 1;
+
+ return CMD_SUCCESS;
+}
+
+DEFUN (no_ipv6_ospf6_mtu_ignore,
+ no_ipv6_ospf6_mtu_ignore_cmd,
+ "no ipv6 ospf6 mtu-ignore",
+ NO_STR
+ IP6_STR
+ OSPF6_STR
+ "Ignore MTU mismatch on this interface\n"
+ )
+{
+ struct ospf6_interface *oi;
+ struct interface *ifp;
+
+ ifp = (struct interface *) vty->index;
+ assert (ifp);
+
+ oi = (struct ospf6_interface *) ifp->info;
+ if (oi == NULL)
+ oi = ospf6_interface_create (ifp);
+ assert (oi);
+
+ oi->mtu_ignore = 0;
+
+ return CMD_SUCCESS;
+}
+
DEFUN (ipv6_ospf6_advertise_prefix_list,
ipv6_ospf6_advertise_prefix_list_cmd,
"ipv6 ospf6 advertise prefix-list WORD",
@@ -1495,6 +1547,9 @@
if (CHECK_FLAG (oi->flag, OSPF6_INTERFACE_PASSIVE))
vty_out (vty, " ipv6 ospf6 passive%s", VNL);
+ if (oi->mtu_ignore)
+ vty_out (vty, " ipv6 ospf6 mtu-ignore%s", VNL);
+
vty_out (vty, "!%s", VNL);
}
return 0;
@@ -1547,6 +1602,9 @@
install_element (INTERFACE_NODE, &ipv6_ospf6_passive_cmd);
install_element (INTERFACE_NODE, &no_ipv6_ospf6_passive_cmd);
+ install_element (INTERFACE_NODE, &ipv6_ospf6_mtu_ignore_cmd);
+ install_element (INTERFACE_NODE, &no_ipv6_ospf6_mtu_ignore_cmd);
+
install_element (INTERFACE_NODE, &ipv6_ospf6_advertise_prefix_list_cmd);
install_element (INTERFACE_NODE, &no_ipv6_ospf6_advertise_prefix_list_cmd);
}
diff --git a/ospf6d/ospf6_interface.h b/ospf6d/ospf6_interface.h
index 878c29e..cf758c0 100644
--- a/ospf6d/ospf6_interface.h
+++ b/ospf6d/ospf6_interface.h
@@ -76,6 +76,9 @@
/* OSPF6 Interface flag */
char flag;
+ /* MTU mismatch check */
+ u_char mtu_ignore;
+
/* Decision of DR Election */
u_int32_t drouter;
u_int32_t bdrouter;
diff --git a/ospf6d/ospf6_message.c b/ospf6d/ospf6_message.c
index d06eba2..51933b7 100644
--- a/ospf6d/ospf6_message.c
+++ b/ospf6d/ospf6_message.c
@@ -832,7 +832,7 @@
((caddr_t) oh + sizeof (struct ospf6_header));
/* Interface MTU check */
- if (ntohs (dbdesc->ifmtu) != oi->ifmtu)
+ if (!oi->mtu_ignore && ntohs (dbdesc->ifmtu) != oi->ifmtu)
{
if (IS_OSPF6_DEBUG_MESSAGE (oh->type, RECV))
zlog_debug ("I/F MTU mismatch");