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Better checksum checking.

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This commit is contained in:
Ondrej Filip 2000-06-05 18:09:15 +00:00
parent 4c5f93d76b
commit aba5e89f93
1 changed files with 3 additions and 1 deletions
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4
proto/ospf/lsupd.c
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@ -276,6 +276,7 @@ ospf_lsupd_rx(struct ospf_lsupd_packet *ps, struct proto *p,
struct top_hash_entry *lsadb; struct top_hash_entry *lsadb;
u16 lenn; u16 lenn;
int diff=((u8 *)lsa)-((u8 *)ps); int diff=((u8 *)lsa)-((u8 *)ps);
u16 chsum;
if(((diff+sizeof(struct ospf_lsa_header))>=size) || if(((diff+sizeof(struct ospf_lsa_header))>=size) ||
((ntohs(lsa->length)+diff)>size)) ((ntohs(lsa->length)+diff)>size))
@ -290,7 +291,8 @@ ospf_lsupd_rx(struct ospf_lsupd_packet *ps, struct proto *p,
break; break;
} }
/* pg 143 (1) */ /* pg 143 (1) */
if(lsa->checksum!=lsasum_check(lsa,NULL,po)) chsum=lsa->checksum;
if(chsum!=lsasum_check(lsa,NULL,po))
{ {
log("Received bad lsa checksum from %I",n->rid); log("Received bad lsa checksum from %I",n->rid);
continue; continue;