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Set destination for PtP links to OSPF_ALLSPFROUTERS.

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Update ospf_db_desc_send(), ospf_ls_upd_queue_send() and ospf_ls_req_send()
to always use OSPF_ALLSPFROUTERS for PtP links.

See RFC 2328, chap 8.1 for details:

    "The IP destination address for the packet is selected as
     follows.  On physical point-to-point networks, the IP
     destination is always set to the address AllSPFRouters."

Without this, it won't be possible to establish adjacencies on
multiple unnumbered links to the same router.
ChangeLog:
2008-07-25 Joakim Tjernlund <Joakim.Tjernlund@transmode.se>

	* ospfd/ospf_packet.c: Set destination for PtP links to
	  OSPF_ALLSPFROUTERS.
This commit is contained in:
Joakim Tjernlund 2008-05-30 16:04:39 +02:00
parent b38309a4ee
commit 53d0deceeb
1 changed files with 14 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
ospfd/ospf_packet.c
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@ -3151,7 +3151,10 @@ ospf_db_desc_send (struct ospf_neighbor *nbr)
op->length = length;
/* Decide destination address. */
op->dst = nbr->address.u.prefix4;
if (oi->type == OSPF_IFTYPE_POINTOPOINT)
op->dst.s_addr = htonl (OSPF_ALLSPFROUTERS);
else
op->dst = nbr->address.u.prefix4;
/* Add packet to the interface output queue. */
ospf_packet_add (oi, op);
@ -3210,7 +3213,10 @@ ospf_ls_req_send (struct ospf_neighbor *nbr)
op->length = length;
/* Decide destination address. */
op->dst = nbr->address.u.prefix4;
if (oi->type == OSPF_IFTYPE_POINTOPOINT)
op->dst.s_addr = htonl (OSPF_ALLSPFROUTERS);
else
op->dst = nbr->address.u.prefix4;
/* Add packet to the interface output queue. */
ospf_packet_add (oi, op);
@ -3326,7 +3332,10 @@ ospf_ls_upd_queue_send (struct ospf_interface *oi, struct list *update,
op->length = length;
/* Decide destination address. */
op->dst.s_addr = addr.s_addr;
if (oi->type == OSPF_IFTYPE_POINTOPOINT)
op->dst.s_addr = htonl (OSPF_ALLSPFROUTERS);
else
op->dst.s_addr = addr.s_addr;
/* Add packet to the interface output queue. */
ospf_packet_add (oi, op);
@ -3403,13 +3412,12 @@ ospf_ls_upd_send (struct ospf_neighbor *nbr, struct list *update, int flag)
/* Decide destination address. */
if (oi->type == OSPF_IFTYPE_VIRTUALLINK)
p.prefix = oi->vl_data->peer_addr;
else if (oi->type == OSPF_IFTYPE_POINTOPOINT)
p.prefix.s_addr = htonl (OSPF_ALLSPFROUTERS);
else if (flag == OSPF_SEND_PACKET_DIRECT)
p.prefix = nbr->address.u.prefix4;
else if (oi->state == ISM_DR || oi->state == ISM_Backup)
p.prefix.s_addr = htonl (OSPF_ALLSPFROUTERS);
else if ((oi->type == OSPF_IFTYPE_POINTOPOINT)
&& (flag == OSPF_SEND_PACKET_INDIRECT))
p.prefix.s_addr = htonl (OSPF_ALLSPFROUTERS);
else if (oi->type == OSPF_IFTYPE_POINTOMULTIPOINT)
p.prefix.s_addr = htonl (OSPF_ALLSPFROUTERS);
else