diff options
Diffstat (limited to 'proto/ospf/dbdes.c')
| -rw-r--r-- | proto/ospf/dbdes.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/proto/ospf/dbdes.c b/proto/ospf/dbdes.c index 8cd7c8b2..75ecf24c 100644 --- a/proto/ospf/dbdes.c +++ b/proto/ospf/dbdes.c @@ -96,7 +96,7 @@ ospf_dbdes_send(struct ospf_neighbor *n, int next) pkt = ospf_tx_buffer(ifa); op = &pkt->ospf_packet; ospf_pkt_fill_hdr(ifa, pkt, DBDES_P); - pkt->iface_mtu = htons(ifa->iface->mtu); + pkt->iface_mtu = (ifa->type == OSPF_IT_VLINK) ? 0 : htons(ifa->iface->mtu); pkt->options = hton_opt(oa->options); pkt->imms = n->myimms; pkt->ddseq = htonl(n->dds); @@ -119,7 +119,7 @@ ospf_dbdes_send(struct ospf_neighbor *n, int next) op = (struct ospf_packet *) pkt; ospf_pkt_fill_hdr(ifa, pkt, DBDES_P); - pkt->iface_mtu = htons(ifa->iface->mtu); + pkt->iface_mtu = (ifa->type == OSPF_IT_VLINK) ? 0 : htons(ifa->iface->mtu); pkt->ddseq = htonl(n->dds); pkt->options = hton_opt(oa->options); @@ -260,6 +260,7 @@ ospf_dbdes_receive(struct ospf_packet *ps_i, struct ospf_iface *ifa, struct ospf_dbdes_packet *ps = (void *) ps_i; u32 ps_ddseq = ntohl(ps->ddseq); u32 ps_options = ntoh_opt(ps->options); + u16 ps_iface_mtu = ntohs(ps->iface_mtu); OSPF_PACKET(ospf_dump_dbdes, ps, "DBDES packet received from %I via %s", n->ip, ifa->iface->name); @@ -277,6 +278,12 @@ ospf_dbdes_receive(struct ospf_packet *ps_i, struct ospf_iface *ifa, if (n->state != NEIGHBOR_EXSTART) return; case NEIGHBOR_EXSTART: + + if ((ps_iface_mtu != ifa->iface->mtu) && (ifa->type != OSPF_IT_VLINK) + && (ps_iface_mtu != 0) && (ifa->iface->mtu != 0)) + log(L_WARN "OSPF: MTU mismatch with neighbour %I on interface %s (remote %d, local %d)", + n->ip, ifa->iface->name, ps_iface_mtu, ifa->iface->mtu); + if ((ps->imms.bit.m && ps->imms.bit.ms && ps->imms.bit.i) && (n->rid > po->router_id) && (size == sizeof(struct ospf_dbdes_packet))) { |