[CAPABILITY_CODE_ORF_OLD] = sizeof (struct capability_orf_entry),
};
-/* Parse given capability.
+/**
+ * Parse given capability.
* XXX: This is reading into a stream, but not using stream API
+ *
+ * @param[out] mp_capability Set to 1 on return iff one or more Multiprotocol
+ * capabilities were encountered.
*/
static int
-bgp_capability_parse (struct peer *peer, size_t length, u_char **error)
+bgp_capability_parse (struct peer *peer, size_t length, int *mp_capability,
+ u_char **error)
{
int ret;
struct stream *s = BGP_INPUT (peer);
{
case CAPABILITY_CODE_MP:
{
+ *mp_capability = 1;
+
/* Ignore capability when override-capability is set. */
if (! CHECK_FLAG (peer->flags, PEER_FLAG_OVERRIDE_CAPABILITY))
{
return as4;
}
-/* Parse open option */
+/**
+ * Parse open option.
+ *
+ * @param[out] mp_capability @see bgp_capability_parse() for semantics.
+ */
int
-bgp_open_option_parse (struct peer *peer, u_char length, int *capability)
+bgp_open_option_parse (struct peer *peer, u_char length, int *mp_capability)
{
int ret;
u_char *error;
ret = bgp_auth_parse (peer, opt_length);
break;
case BGP_OPEN_OPT_CAP:
- ret = bgp_capability_parse (peer, opt_length, &error);
- *capability = 1;
+ ret = bgp_capability_parse (peer, opt_length, mp_capability, &error);
break;
default:
bgp_notify_send (peer,
}
}
- /* Check there is no common capability send Unsupported Capability
+ /* Check there are no common AFI/SAFIs and send Unsupported Capability
error. */
- if (*capability && ! CHECK_FLAG (peer->flags, PEER_FLAG_OVERRIDE_CAPABILITY))
+ if (*mp_capability &&
+ ! CHECK_FLAG (peer->flags, PEER_FLAG_OVERRIDE_CAPABILITY))
{
if (! peer->afc_nego[AFI_IP][SAFI_UNICAST]
&& ! peer->afc_nego[AFI_IP][SAFI_MULTICAST]
&& ! peer->afc_nego[AFI_IP6][SAFI_UNICAST]
&& ! peer->afc_nego[AFI_IP6][SAFI_MULTICAST])
{
- plog_err (peer->log, "%s [Error] No common capability", peer->host);
+ plog_err (peer->log, "%s [Error] Configured AFI/SAFIs do not "
+ "overlap with received MP capabilities",
+ peer->host);
if (error != error_data)
as_t as4 = 0;
struct peer *realpeer;
struct in_addr remote_id;
- int capability;
+ int mp_capability;
u_int8_t notify_data_remote_as[2];
u_int8_t notify_data_remote_id[4];
inet_ntoa (remote_id));
/* BEGIN to read the capability here, but dont do it yet */
- capability = 0;
+ mp_capability = 0;
optlen = stream_getc (peer->ibuf);
if (optlen != 0)
/* Open option part parse. */
if (optlen != 0)
{
- if ((ret = bgp_open_option_parse (peer, optlen, &capability)) < 0)
+ if ((ret = bgp_open_option_parse (peer, optlen, &mp_capability)) < 0)
{
bgp_notify_send (peer,
BGP_NOTIFY_OPEN_ERR,
peer->host);
}
- /* Override capability. */
- if (! capability || CHECK_FLAG (peer->flags, PEER_FLAG_OVERRIDE_CAPABILITY))
+ /*
+ * Assume that the peer supports the locally configured set of
+ * AFI/SAFIs if the peer did not send us any Mulitiprotocol
+ * capabilities, or if 'override-capability' is configured.
+ */
+ if (! mp_capability ||
+ CHECK_FLAG (peer->flags, PEER_FLAG_OVERRIDE_CAPABILITY))
{
peer->afc_nego[AFI_IP][SAFI_UNICAST] = peer->afc[AFI_IP][SAFI_UNICAST];
peer->afc_nego[AFI_IP][SAFI_MULTICAST] = peer->afc[AFI_IP][SAFI_MULTICAST];