bgpd/bgp_mplsvpn.h

   1 /* MPLS-VPN
   2  * Copyright (C) 2000 Kunihiro Ishiguro <kunihiro@zebra.org>
   3  *
   4  * This file is part of GxNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef _QUAGGA_BGP_MPLSVPN_H
  22 #define _QUAGGA_BGP_MPLSVPN_H
  23
  24 #include "bgpd/bgp_route.h"
  25 #include "bgpd/bgp_rd.h"
  26 #include "bgpd/bgp_zebra.h"
  27
  28 #define MPLS_LABEL_IS_SPECIAL(label) ((label) <= MPLS_LABEL_EXTENSION)
  29 #define MPLS_LABEL_IS_NULL(label)                                              \
  30         ((label) == MPLS_LABEL_IPV4_EXPLICIT_NULL                              \
  31          || (label) == MPLS_LABEL_IPV6_EXPLICIT_NULL                           \
  32          || (label) == MPLS_LABEL_IMPLICIT_NULL)
  33
  34 #define BGP_VPNVX_HELP_STR                                                     \
  35         "Address Family\n"                                                     \
  36         "Address Family\n"
  37
  38 #define V4_HEADER                                                              \
  39         "   Network          Next Hop            Metric LocPrf Weight Path\n"
  40 #define V4_HEADER_TAG "   Network          Next Hop      In tag/Out tag\n"
  41 #define V4_HEADER_OVERLAY                                                      \
  42         "   Network          Next Hop      EthTag    Overlay Index   RouterMac\n"
  43
  44 extern void bgp_mplsvpn_init(void);
  45 extern int bgp_nlri_parse_vpn(struct peer *, struct attr *, struct bgp_nlri *);
  46 extern uint32_t decode_label(mpls_label_t *);
  47 extern void encode_label(mpls_label_t, mpls_label_t *);
  48
  49 extern int argv_find_and_parse_vpnvx(struct cmd_token **argv, int argc,
  50                                      int *index, afi_t *afi);
  51 extern int bgp_show_mpls_vpn(struct vty *vty, afi_t afi, struct prefix_rd *prd,
  52                              enum bgp_show_type type, void *output_arg,
  53                              int tags, uint8_t use_json);
  54
  55 extern void vpn_leak_from_vrf_update(struct bgp *bgp_vpn, struct bgp *bgp_vrf,
  56                                      struct bgp_info *info_vrf);
  57
  58 extern void vpn_leak_from_vrf_withdraw(struct bgp *bgp_vpn, struct bgp *bgp_vrf,
  59                                        struct bgp_info *info_vrf);
  60
  61 extern void vpn_leak_from_vrf_withdraw_all(struct bgp *bgp_vpn,
  62                                            struct bgp *bgp_vrf, afi_t afi);
  63
  64 extern void vpn_leak_from_vrf_update_all(struct bgp *bgp_vpn,
  65                                          struct bgp *bgp_vrf, afi_t afi);
  66
  67 extern void vpn_leak_to_vrf_withdraw_all(struct bgp *bgp_vrf, afi_t afi);
  68
  69 extern void vpn_leak_to_vrf_update_all(struct bgp *bgp_vrf, struct bgp *bgp_vpn,
  70                                        afi_t afi);
  71
  72 extern void vpn_leak_to_vrf_update(struct bgp *bgp_vpn,
  73                                    struct bgp_info *info_vpn);
  74
  75 extern void vpn_leak_to_vrf_withdraw(struct bgp *bgp_vpn,
  76                                      struct bgp_info *info_vpn);
  77
  78 extern void vpn_leak_zebra_vrf_label_update(struct bgp *bgp, afi_t afi);
  79 extern void vpn_leak_zebra_vrf_label_withdraw(struct bgp *bgp, afi_t afi);
  80 extern int vpn_leak_label_callback(mpls_label_t label, void *lblid, bool alloc);
  81
  82 static inline int vpn_leak_to_vpn_active(struct bgp *bgp_vrf, afi_t afi,
  83                                          const char **pmsg)
  84 {
  85         if (bgp_vrf->inst_type != BGP_INSTANCE_TYPE_VRF
  86                 && bgp_vrf->inst_type != BGP_INSTANCE_TYPE_DEFAULT) {
  87
  88                 if (pmsg)
  89                         *pmsg = "source bgp instance neither vrf nor default";
  90                 return 0;
  91         }
  92
  93         /* Is vrf configured to export to vpn? */
  94         if (!CHECK_FLAG(bgp_vrf->af_flags[afi][SAFI_UNICAST],
  95                         BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT)) {
  96                 if (pmsg)
  97                         *pmsg = "export not set";
  98                 return 0;
  99         }
 100
 101         /* Is there an RT list set? */
 102         if (!bgp_vrf->vpn_policy[afi].rtlist[BGP_VPN_POLICY_DIR_TOVPN]) {
 103                 if (pmsg)
 104                         *pmsg = "rtlist tovpn not defined";
 105                 return 0;
 106         }
 107
 108         /* Is there an RD set? */
 109         if (!CHECK_FLAG(bgp_vrf->vpn_policy[afi].flags,
 110                         BGP_VPN_POLICY_TOVPN_RD_SET)) {
 111                 if (pmsg)
 112                         *pmsg = "rd not defined";
 113                 return 0;
 114         }
 115
 116         /* Is a route-map specified, but not defined? */
 117         if (bgp_vrf->vpn_policy[afi].rmap_name[BGP_VPN_POLICY_DIR_TOVPN] &&
 118                 !bgp_vrf->vpn_policy[afi].rmap[BGP_VPN_POLICY_DIR_TOVPN]) {
 119                 if (pmsg)
 120                         *pmsg = "route-map tovpn named but not defined";
 121                 return 0;
 122         }
 123
 124         /* Is there an "auto" export label that isn't allocated yet? */
 125         if (CHECK_FLAG(bgp_vrf->vpn_policy[afi].flags,
 126                 BGP_VPN_POLICY_TOVPN_LABEL_AUTO) &&
 127                 (bgp_vrf->vpn_policy[afi].tovpn_label == MPLS_LABEL_NONE)) {
 128
 129                 if (pmsg)
 130                         *pmsg = "auto label not allocated";
 131                 return 0;
 132         }
 133
 134         return 1;
 135 }
 136
 137 static inline int vpn_leak_from_vpn_active(struct bgp *bgp_vrf, afi_t afi,
 138                                            const char **pmsg)
 139 {
 140         if (bgp_vrf->inst_type != BGP_INSTANCE_TYPE_VRF
 141                 && bgp_vrf->inst_type != BGP_INSTANCE_TYPE_DEFAULT) {
 142
 143                 if (pmsg)
 144                         *pmsg = "destination bgp instance neither vrf nor default";
 145                 return 0;
 146         }
 147
 148         /* Is vrf configured to import from vpn? */
 149         if (!CHECK_FLAG(bgp_vrf->af_flags[afi][SAFI_UNICAST],
 150                         BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT)) {
 151                 if (pmsg)
 152                         *pmsg = "import not set";
 153                 return 0;
 154         }
 155
 156         /* Is there an RT list set? */
 157         if (!bgp_vrf->vpn_policy[afi].rtlist[BGP_VPN_POLICY_DIR_FROMVPN]) {
 158                 if (pmsg)
 159                         *pmsg = "rtlist fromvpn not defined";
 160                 return 0;
 161         }
 162
 163         /* Is a route-map specified, but not defined? */
 164         if (bgp_vrf->vpn_policy[afi].rmap_name[BGP_VPN_POLICY_DIR_FROMVPN] &&
 165                 !bgp_vrf->vpn_policy[afi].rmap[BGP_VPN_POLICY_DIR_FROMVPN]) {
 166                 if (pmsg)
 167                         *pmsg = "route-map fromvpn named but not defined";
 168                 return 0;
 169         }
 170         return 1;
 171 }
 172
 173 static inline void vpn_leak_prechange(vpn_policy_direction_t direction,
 174                                       afi_t afi, struct bgp *bgp_vpn,
 175                                       struct bgp *bgp_vrf)
 176 {
 177         if ((direction == BGP_VPN_POLICY_DIR_FROMVPN) &&
 178                 vpn_leak_from_vpn_active(bgp_vrf, afi, NULL)) {
 179
 180                 vpn_leak_to_vrf_withdraw_all(bgp_vrf, afi);
 181         }
 182         if ((direction == BGP_VPN_POLICY_DIR_TOVPN) &&
 183                 vpn_leak_to_vpn_active(bgp_vrf, afi, NULL)) {
 184
 185                 vpn_leak_from_vrf_withdraw_all(bgp_vpn, bgp_vrf, afi);
 186         }
 187 }
 188
 189 static inline void vpn_leak_postchange(vpn_policy_direction_t direction,
 190                                        afi_t afi, struct bgp *bgp_vpn,
 191                                        struct bgp *bgp_vrf)
 192 {
 193         if (direction == BGP_VPN_POLICY_DIR_FROMVPN)
 194                 vpn_leak_to_vrf_update_all(bgp_vrf, bgp_vpn, afi);
 195         if (direction == BGP_VPN_POLICY_DIR_TOVPN) {
 196
 197                 if (bgp_vrf->vpn_policy[afi].tovpn_label !=
 198                         bgp_vrf->vpn_policy[afi]
 199                                .tovpn_zebra_vrf_label_last_sent) {
 200                         vpn_leak_zebra_vrf_label_update(bgp_vrf, afi);
 201                 }
 202
 203                 vpn_leak_from_vrf_update_all(bgp_vpn, bgp_vrf, afi);
 204         }
 205 }
 206
 207 extern void vpn_policy_routemap_event(const char *rmap_name);
 208
 209 extern vrf_id_t get_first_vrf_for_redirect_with_rt(struct ecommunity *eckey);
 210
 211 #endif /* _QUAGGA_BGP_MPLSVPN_H */