/* 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); }