ospf6d: Fix crash in prefix-list handling

Commit 427f8e61bb711b51 introduced prefix list callbacks
to handle when a prefix list is changed.  Unfortunately
if you have ospf6 running but not configured it crashes.

Modify ospf6d to not crash when we are not properly configured
yet for prefix-lists handling.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

diff --git a/ospf6d/ospf6_area.c b/ospf6d/ospf6_area.c
index 485937d882a39730c775d44ad3334d0cfa00717c..b5584dc86de19526a4c6f6f3acd26aec7f7fae5f 100644 (file)
--- a/ospf6d/ospf6_area.c
+++ b/ospf6d/ospf6_area.c
@@ -642,6 +642,9 @@ void ospf6_area_plist_update(struct prefix_list *plist, int add)
        struct listnode *n;
        const char *name = prefix_list_name(plist);
 
+       if (!ospf6)
+               return;
+
        for (ALL_LIST_ELEMENTS_RO(ospf6->area_list, n, oa)) {
                if (PREFIX_NAME_IN(oa) && !strcmp(PREFIX_NAME_IN(oa), name))
                        PREFIX_LIST_IN(oa) = add ? plist : NULL;