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Fix rnh_walktree_from() function (patch from kern/174959).

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Require valid netmask to be passed since host route is always a leaf.

PR:		kern/174959
Submitted by:	Keith Sklower
MFC after:	2 weeks
This commit is contained in:
Alexander V. Chernikov 2014-05-01 15:04:32 +00:00
parent ccb7284af1
commit 32fb15e802
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=265196
1 changed files with 6 additions and 4 deletions
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10
sys/net/radix.c
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@ -971,6 +971,8 @@ rn_walktree_from(struct radix_node_head *h, void *a, void *m,
int stopping = 0;
int lastb;
KASSERT(m != NULL, ("%s: mask needs to be specified", __func__));
/*
* rn_search_m is sort-of-open-coded here. We cannot use the
* function because we need to keep track of the last node seen.
@ -994,11 +996,11 @@ rn_walktree_from(struct radix_node_head *h, void *a, void *m,
/*
* Two cases: either we stepped off the end of our mask,
* in which case last == rn, or we reached a leaf, in which
* case we want to start from the last node we looked at.
* Either way, last is the node we want to start from.
* case we want to start from the leaf.
*/
rn = last;
lastb = rn->rn_bit;
if (rn->rn_bit >= 0)
rn = last;
lastb = last->rn_bit;
/* printf("rn %p, lastb %d\n", rn, lastb);*/