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isisd: pull up invalid prefix assert()

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processing invalid prefixes causes isisd to assert() or otherwise
misbehave in ip_masklen/apply_mask.  pull up the assert() to indicate
better there's broken data in isisd's LSDB.

  * isisd/isis_spf.c: assert() prefix lengths

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
This commit is contained in:
David Lamparter 2012-05-08 06:27:04 +02:00
parent 0fece074e8
commit 948b6bef7f
1 changed files with 4 additions and 0 deletions
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4
isisd/isis_spf.c
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@ -813,6 +813,8 @@ lspfragloop:
for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.te_ipv4_reachs,
node, te_ipv4_reach))
{
assert ((te_ipv4_reach->control & 0x3F) <= IPV4_MAX_BITLEN);
dist = cost + ntohl (te_ipv4_reach->te_metric);
vtype = VTYPE_IPREACH_TE;
prefix.u.prefix4 = newprefix2inaddr (&te_ipv4_reach->prefix_start,
@ -829,6 +831,8 @@ lspfragloop:
prefix.family = AF_INET6;
for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.ipv6_reachs, node, ip6reach))
{
assert (ip6reach->prefix_len <= IPV6_MAX_BITLEN);
dist = cost + ip6reach->metric;
vtype = (ip6reach->control_info & CTRL_INFO_DISTRIBUTION) ?
VTYPE_IP6REACH_EXTERNAL : VTYPE_IP6REACH_INTERNAL;