/* Fill in capability open option to the packet. */
void
bgp_open_capability (struct stream *s, struct peer *peer)
{
u_char len;
unsigned long cp, capp, rcapp;
afi_t afi;
safi_t safi;
as_t local_as;
u_int32_t restart_time;
/* Remember current pointer for Opt Parm Len. */
cp = stream_get_endp (s);
/* Opt Parm Len. */
stream_putc (s, 0);
/* Do not send capability. */
if (! CHECK_FLAG (peer->sflags, PEER_STATUS_CAPABILITY_OPEN)
|| CHECK_FLAG (peer->flags, PEER_FLAG_DONT_CAPABILITY))
return;
/* IPv4 unicast. */
if (peer->afc[AFI_IP][SAFI_UNICAST])
{
peer->afc_adv[AFI_IP][SAFI_UNICAST] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP);
stream_putc (s, 0);
stream_putc (s, SAFI_UNICAST);
}
/* IPv4 multicast. */
if (peer->afc[AFI_IP][SAFI_MULTICAST])
{
peer->afc_adv[AFI_IP][SAFI_MULTICAST] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP);
stream_putc (s, 0);
stream_putc (s, SAFI_MULTICAST);
}
/* IPv4 VPN */
if (peer->afc[AFI_IP][SAFI_MPLS_VPN])
{
peer->afc_adv[AFI_IP][SAFI_MPLS_VPN] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP);
stream_putc (s, 0);
stream_putc (s, SAFI_MPLS_LABELED_VPN);
}
/* ENCAP */
if (peer->afc[AFI_IP][SAFI_ENCAP])
{
peer->afc_adv[AFI_IP][SAFI_ENCAP] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP);
stream_putc (s, 0);
stream_putc (s, SAFI_ENCAP);
}
/* IPv6 unicast. */
if (peer->afc[AFI_IP6][SAFI_UNICAST])
{
peer->afc_adv[AFI_IP6][SAFI_UNICAST] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP6);
stream_putc (s, 0);
stream_putc (s, SAFI_UNICAST);
}
/* IPv6 multicast. */
if (peer->afc[AFI_IP6][SAFI_MULTICAST])
{
peer->afc_adv[AFI_IP6][SAFI_MULTICAST] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP6);
stream_putc (s, 0);
stream_putc (s, SAFI_MULTICAST);
}
/* IPv6 VPN. */
if (peer->afc[AFI_IP6][SAFI_MPLS_VPN])
{
peer->afc_adv[AFI_IP6][SAFI_MPLS_VPN] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP6);
stream_putc (s, 0);
stream_putc (s, SAFI_MPLS_LABELED_VPN);
}
/* IPv6 ENCAP. */
if (peer->afc[AFI_IP6][SAFI_ENCAP])
{
peer->afc_adv[AFI_IP6][SAFI_ENCAP] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP6);
stream_putc (s, 0);
stream_putc (s, SAFI_ENCAP);
}
/* Route refresh. */
SET_FLAG (peer->cap, PEER_CAP_REFRESH_ADV);
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_REFRESH_LEN + 2);
stream_putc (s, CAPABILITY_CODE_REFRESH_OLD);
stream_putc (s, CAPABILITY_CODE_REFRESH_LEN);
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_REFRESH_LEN + 2);
stream_putc (s, CAPABILITY_CODE_REFRESH);
stream_putc (s, CAPABILITY_CODE_REFRESH_LEN);
/* AS4 */
SET_FLAG (peer->cap, PEER_CAP_AS4_ADV);
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_AS4_LEN + 2);
stream_putc (s, CAPABILITY_CODE_AS4);
stream_putc (s, CAPABILITY_CODE_AS4_LEN);
if ( peer->change_local_as )
local_as = peer->change_local_as;
else
local_as = peer->local_as;
stream_putl (s, local_as );
/* ORF capability. */
for (afi = AFI_IP ; afi < AFI_MAX ; afi++)
for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++)
if (CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM)
|| CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_RM))
{
bgp_open_capability_orf (s, peer, afi, safi, CAPABILITY_CODE_ORF_OLD);
bgp_open_capability_orf (s, peer, afi, safi, CAPABILITY_CODE_ORF);
}
/* Dynamic capability. */
if (CHECK_FLAG (peer->flags, PEER_FLAG_DYNAMIC_CAPABILITY))
{
SET_FLAG (peer->cap, PEER_CAP_DYNAMIC_ADV);
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_DYNAMIC_LEN + 2);
stream_putc (s, CAPABILITY_CODE_DYNAMIC);
stream_putc (s, CAPABILITY_CODE_DYNAMIC_LEN);
}
/* Sending base graceful-restart capability irrespective of the config */
SET_FLAG (peer->cap, PEER_CAP_RESTART_ADV);
stream_putc (s, BGP_OPEN_OPT_CAP);
capp = stream_get_endp (s); /* Set Capability Len Pointer */
stream_putc (s, 0); /* Capability Length */
stream_putc (s, CAPABILITY_CODE_RESTART);
rcapp = stream_get_endp (s); /* Set Restart Capability Len Pointer */
stream_putc (s, 0);
restart_time = peer->bgp->restart_time;
if (peer->bgp->t_startup)
{
SET_FLAG (restart_time, RESTART_R_BIT);
SET_FLAG (peer->cap, PEER_CAP_RESTART_BIT_ADV);
}
stream_putw (s, restart_time);
/* Send address-family specific graceful-restart capability only when GR config
is present */
if (bgp_flag_check (peer->bgp, BGP_FLAG_GRACEFUL_RESTART))
{
for (afi = AFI_IP ; afi < AFI_MAX ; afi++)
for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++)
if (peer->afc[afi][safi])
{
stream_putw (s, afi);
stream_putc (s, safi);
stream_putc (s, 0); //Forwarding is not retained as of now.
}
}
/* Total Graceful restart capability Len. */
len = stream_get_endp (s) - rcapp - 1;
stream_putc_at (s, rcapp, len);
/* Total Capability Len. */
len = stream_get_endp (s) - capp - 1;
stream_putc_at (s, capp, len);
/* Total Opt Parm Len. */
len = stream_get_endp (s) - cp - 1;
stream_putc_at (s, cp, len);
}
/* Fill in capability open option to the packet. */
void
bgp_open_capability (struct stream *s, struct peer *peer)
{
u_char len;
unsigned long cp;
afi_t afi;
safi_t safi;
as_t local_as;
/* Remember current pointer for Opt Parm Len. */
cp = stream_get_endp (s);
/* Opt Parm Len. */
stream_putc (s, 0);
/* Do not send capability. */
if (! CHECK_FLAG (peer->sflags, PEER_STATUS_CAPABILITY_OPEN)
|| CHECK_FLAG (peer->flags, PEER_FLAG_DONT_CAPABILITY))
return;
/* IPv4 unicast. */
if (peer->afc[AFI_IP][SAFI_UNICAST])
{
peer->afc_adv[AFI_IP][SAFI_UNICAST] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP);
stream_putc (s, 0);
stream_putc (s, SAFI_UNICAST);
}
/* IPv4 multicast. */
if (peer->afc[AFI_IP][SAFI_MULTICAST])
{
peer->afc_adv[AFI_IP][SAFI_MULTICAST] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP);
stream_putc (s, 0);
stream_putc (s, SAFI_MULTICAST);
}
/* IPv4 VPN */
if (peer->afc[AFI_IP][SAFI_MPLS_VPN])
{
peer->afc_adv[AFI_IP][SAFI_MPLS_VPN] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP);
stream_putc (s, 0);
stream_putc (s, SAFI_MPLS_LABELED_VPN);
}
#ifdef HAVE_IPV6
/* IPv6 unicast. */
if (peer->afc[AFI_IP6][SAFI_UNICAST])
{
peer->afc_adv[AFI_IP6][SAFI_UNICAST] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP6);
stream_putc (s, 0);
stream_putc (s, SAFI_UNICAST);
}
/* IPv6 multicast. */
if (peer->afc[AFI_IP6][SAFI_MULTICAST])
{
peer->afc_adv[AFI_IP6][SAFI_MULTICAST] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP6);
stream_putc (s, 0);
stream_putc (s, SAFI_MULTICAST);
}
#endif /* HAVE_IPV6 */
/* Route refresh. */
SET_FLAG (peer->cap, PEER_CAP_REFRESH_ADV);
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_REFRESH_LEN + 2);
stream_putc (s, CAPABILITY_CODE_REFRESH_OLD);
stream_putc (s, CAPABILITY_CODE_REFRESH_LEN);
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_REFRESH_LEN + 2);
stream_putc (s, CAPABILITY_CODE_REFRESH);
stream_putc (s, CAPABILITY_CODE_REFRESH_LEN);
/* AS4 */
SET_FLAG (peer->cap, PEER_CAP_AS4_ADV);
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_AS4_LEN + 2);
stream_putc (s, CAPABILITY_CODE_AS4);
stream_putc (s, CAPABILITY_CODE_AS4_LEN);
if ( peer->change_local_as )
local_as = peer->change_local_as;
else
local_as = peer->local_as;
stream_putl (s, local_as );
/* ORF capability. */
for (afi = AFI_IP ; afi < AFI_MAX ; afi++)
for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++)
if (CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM)
|| CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_RM))
{
bgp_open_capability_orf (s, peer, afi, safi, CAPABILITY_CODE_ORF_OLD);
bgp_open_capability_orf (s, peer, afi, safi, CAPABILITY_CODE_ORF);
}
/* Dynamic capability. */
if (CHECK_FLAG (peer->flags, PEER_FLAG_DYNAMIC_CAPABILITY))
{
SET_FLAG (peer->cap, PEER_CAP_DYNAMIC_ADV);
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_DYNAMIC_LEN + 2);
stream_putc (s, CAPABILITY_CODE_DYNAMIC);
stream_putc (s, CAPABILITY_CODE_DYNAMIC_LEN);
}
/* Graceful restart capability */
if (bgp_flag_check (peer->bgp, BGP_FLAG_GRACEFUL_RESTART))
{
SET_FLAG (peer->cap, PEER_CAP_RESTART_ADV);
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_RESTART_LEN + 2);
stream_putc (s, CAPABILITY_CODE_RESTART);
stream_putc (s, CAPABILITY_CODE_RESTART_LEN);
stream_putw (s, peer->bgp->restart_time);
}
/* Total Opt Parm Len. */
len = stream_get_endp (s) - cp - 1;
stream_putc_at (s, cp, len);
}
/* Fill in capability open option to the packet. */
void
bgp_open_capability (struct stream *s, struct peer *peer)
{
u_char len;
unsigned long cp;
afi_t afi;
safi_t safi;
/* Remember current pointer for Opt Parm Len. */
cp = stream_get_putp (s);
/* Opt Parm Len. */
stream_putc (s, 0);
/* Do not send capability. */
if (! CHECK_FLAG (peer->sflags, PEER_STATUS_CAPABILITY_OPEN)
|| CHECK_FLAG (peer->flags, PEER_FLAG_DONT_CAPABILITY))
return;
/* When the peer is IPv4 unicast only, do not send capability. */
if (! peer->afc[AFI_IP][SAFI_MULTICAST]
&& ! peer->afc[AFI_IP][SAFI_MPLS_VPN]
&& ! peer->afc[AFI_IP6][SAFI_UNICAST]
&& ! peer->afc[AFI_IP6][SAFI_MULTICAST]
&& CHECK_FLAG (peer->flags, PEER_FLAG_NO_ROUTE_REFRESH_CAP)
&& ! CHECK_FLAG (peer->af_flags[AFI_IP][SAFI_UNICAST],
PEER_FLAG_ORF_PREFIX_SM)
&& ! CHECK_FLAG (peer->af_flags[AFI_IP][SAFI_UNICAST],
PEER_FLAG_ORF_PREFIX_RM)
&& ! CHECK_FLAG (peer->af_flags[AFI_IP][SAFI_MULTICAST],
PEER_FLAG_ORF_PREFIX_SM)
&& ! CHECK_FLAG (peer->af_flags[AFI_IP][SAFI_MULTICAST],
PEER_FLAG_ORF_PREFIX_RM)
&& ! CHECK_FLAG (peer->flags, PEER_FLAG_DYNAMIC_CAPABILITY))
return;
/* IPv4 unicast. */
if (peer->afc[AFI_IP][SAFI_UNICAST])
{
peer->afc_adv[AFI_IP][SAFI_UNICAST] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP);
stream_putc (s, 0);
stream_putc (s, SAFI_UNICAST);
}
/* IPv4 multicast. */
if (peer->afc[AFI_IP][SAFI_MULTICAST])
{
peer->afc_adv[AFI_IP][SAFI_MULTICAST] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP);
stream_putc (s, 0);
stream_putc (s, SAFI_MULTICAST);
}
/* IPv4 VPN */
if (peer->afc[AFI_IP][SAFI_MPLS_VPN])
{
peer->afc_adv[AFI_IP][SAFI_MPLS_VPN] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP);
stream_putc (s, 0);
stream_putc (s, BGP_SAFI_VPNV4);
}
#ifdef HAVE_IPV6
/* IPv6 unicast. */
if (peer->afc[AFI_IP6][SAFI_UNICAST])
{
peer->afc_adv[AFI_IP6][SAFI_UNICAST] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP6);
stream_putc (s, 0);
stream_putc (s, SAFI_UNICAST);
}
/* IPv6 multicast. */
if (peer->afc[AFI_IP6][SAFI_MULTICAST])
{
peer->afc_adv[AFI_IP6][SAFI_MULTICAST] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP6);
stream_putc (s, 0);
stream_putc (s, SAFI_MULTICAST);
}
#endif /* HAVE_IPV6 */
/* Route refresh. */
if (! CHECK_FLAG (peer->flags, PEER_FLAG_NO_ROUTE_REFRESH_CAP))
{
SET_FLAG (peer->cap, PEER_CAP_REFRESH_ADV);
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_REFRESH_LEN + 2);
stream_putc (s, CAPABILITY_CODE_REFRESH_OLD);
stream_putc (s, CAPABILITY_CODE_REFRESH_LEN);
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_REFRESH_LEN + 2);
stream_putc (s, CAPABILITY_CODE_REFRESH);
stream_putc (s, CAPABILITY_CODE_REFRESH_LEN);
}
/* ORF capability. */
for (afi = AFI_IP ; afi < AFI_MAX ; afi++)
for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++)
if (CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM)
|| CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_RM))
{
bgp_open_capability_orf (s, peer, afi, safi, CAPABILITY_CODE_ORF_OLD);
bgp_open_capability_orf (s, peer, afi, safi, CAPABILITY_CODE_ORF);
}
/* Dynamic capability. */
if (CHECK_FLAG (peer->flags, PEER_FLAG_DYNAMIC_CAPABILITY))
{
SET_FLAG (peer->cap, PEER_CAP_DYNAMIC_ADV);
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_DYNAMIC_LEN + 2);
stream_putc (s, CAPABILITY_CODE_DYNAMIC);
stream_putc (s, CAPABILITY_CODE_DYNAMIC_LEN);
}
/* Total Opt Parm Len. */
len = stream_get_putp (s) - cp - 1;
stream_putc_at (s, cp, len);
}
