diff options
| -rw-r--r-- | proto/ospf/packet.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/proto/ospf/packet.c b/proto/ospf/packet.c index ef3066e..26cc4d4 100644 --- a/proto/ospf/packet.c +++ b/proto/ospf/packet.c @@ -85,6 +85,7 @@ ospf_rx_hook(sock * sk, int size) struct ospf_iface *ifa = (struct ospf_iface *) (sk->data); struct proto *p = (struct proto *) (ifa->proto); struct ospf_neighbor *n; + int osize; char *mesg = "Bad OSPF packet from "; if (ifa->stub) @@ -93,6 +94,7 @@ ospf_rx_hook(sock * sk, int size) DBG("%s: RX_Hook called on interface %s.\n", p->name, sk->iface->name); ps = (struct ospf_packet *) ipv4_skip_header(sk->rbuf, &size); + osize = ntohs(ps->length); if (ps == NULL) { log(L_ERR "%s%I - bad IP header", mesg, sk->faddr); @@ -105,9 +107,9 @@ ospf_rx_hook(sock * sk, int size) return 1; } - if ((ntohs(ps->length) != size) || (size != (4 * (size / 4)))) + if ((osize > size) || (osize != (4 * (osize / 4)))) { - log(L_ERR "%s%I - size field does not match", mesg, sk->faddr); + log(L_ERR "%s%I - size field does not match (%d/%d)", mesg, sk->faddr, ntohs(ps->length), size ); return 1; } |