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ospfd: Ensure we have some non header lsa data

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In some cases FRR is receiving a lsa data packet
with a length set to the length of the header only.
If we are expecting data from a peer in the form
of lsa data.  Let's enforce it.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>
This commit is contained in:
Donald Sharp 2021-08-10 19:21:19 -04:00
parent 2a8ded2b97
commit cf680c38a9
2 changed files with 5 additions and 3 deletions
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2
ospfd/ospf_opaque.h
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@ -77,6 +77,8 @@
#define OPAQUE_TYPE_RANGE_RESERVED(type) (127 < (type) && (type) <= 255)
#define OSPF_OPAQUE_LSA_MIN_SIZE 4U
#define VALID_OPAQUE_INFO_LEN(lsahdr) \
((ntohs((lsahdr)->length) >= sizeof(struct lsa_header)) \
&& ((ntohs((lsahdr)->length) < OSPF_MAX_LSA_SIZE)) \

6
ospfd/ospf_packet.c
View File

@ -108,9 +108,9 @@ static const uint16_t ospf_lsa_minlen[] = {
0,
OSPF_AS_EXTERNAL_LSA_MIN_SIZE,
0,
0,
0,
0,
OSPF_OPAQUE_LSA_MIN_SIZE,
OSPF_OPAQUE_LSA_MIN_SIZE,
OSPF_OPAQUE_LSA_MIN_SIZE,
};
/* for ospf_check_auth() */