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 u_int32_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, u_char 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
  81 static inline int vpn_leak_to_vpn_active(struct bgp *bgp_vrf, afi_t afi,
  82                                          const char **pmsg)
  83 {
  84         /* Is vrf configured to export to vpn? */
  85         if (!CHECK_FLAG(bgp_vrf->af_flags[afi][SAFI_UNICAST],
  86                         BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT)) {
  87                 if (pmsg)
  88                         *pmsg = "export not set";
  89                 return 0;
  90         }
  91
  92         /* Is there an RT list set? */
  93         if (!bgp_vrf->vpn_policy[afi].rtlist[BGP_VPN_POLICY_DIR_TOVPN]) {
  94                 if (pmsg)
  95                         *pmsg = "rtlist tovpn not defined";
  96                 return 0;
  97         }
  98
  99         /* Is there an RD set? */
 100         if (!CHECK_FLAG(bgp_vrf->vpn_policy[afi].flags,
 101                         BGP_VPN_POLICY_TOVPN_RD_SET)) {
 102                 if (pmsg)
 103                         *pmsg = "rd not defined";
 104                 return 0;
 105         }
 106         return 1;
 107 }
 108
 109 static inline int vpn_leak_from_vpn_active(struct bgp *bgp_vrf, afi_t afi,
 110                                            const char **pmsg,
 111                                            struct bgp_redist **pred)
 112 {
 113         struct bgp_redist *red;
 114
 115         if (bgp_vrf->inst_type != BGP_INSTANCE_TYPE_VRF
 116             && bgp_vrf->inst_type != BGP_INSTANCE_TYPE_DEFAULT) {
 117
 118                 if (pmsg)
 119                         *pmsg = "destination bgp instance neither vrf nor default";
 120                 return 0;
 121         }
 122
 123         /* Hijack zebra redist bits for this route type */
 124         red = bgp_redist_lookup(bgp_vrf, afi, ZEBRA_ROUTE_BGP_VPN, 0);
 125         if (red) {
 126                 if (pred)
 127                         *pred = red;
 128         } else {
 129                 if (pmsg)
 130                         *pmsg = "redist not set";
 131                 return 0;
 132         }
 133         if (!bgp_vrf->vpn_policy[afi].rtlist[BGP_VPN_POLICY_DIR_FROMVPN]) {
 134                 if (pmsg)
 135                         *pmsg = "rtlist fromvpn not defined";
 136                 return 0;
 137         }
 138         return 1;
 139 }
 140
 141 static inline void vpn_leak_prechange(vpn_policy_direction_t direction,
 142                                       afi_t afi, struct bgp *bgp_vpn,
 143                                       struct bgp *bgp_vrf)
 144 {
 145         if (direction == BGP_VPN_POLICY_DIR_FROMVPN)
 146                 vpn_leak_to_vrf_withdraw_all(bgp_vrf, afi);
 147         if (direction == BGP_VPN_POLICY_DIR_TOVPN)
 148                 vpn_leak_from_vrf_withdraw_all(bgp_vpn, bgp_vrf, afi);
 149 }
 150
 151 static inline void vpn_leak_postchange(vpn_policy_direction_t direction,
 152                                        afi_t afi, struct bgp *bgp_vpn,
 153                                        struct bgp *bgp_vrf)
 154 {
 155         if (direction == BGP_VPN_POLICY_DIR_FROMVPN)
 156                 vpn_leak_to_vrf_update_all(bgp_vrf, bgp_vpn, afi);
 157         if (direction == BGP_VPN_POLICY_DIR_TOVPN) {
 158
 159                 if (bgp_vrf->vpn_policy[afi].tovpn_label
 160                     != bgp_vrf->vpn_policy[afi]
 161                                .tovpn_zebra_vrf_label_last_sent) {
 162                         vpn_leak_zebra_vrf_label_update(bgp_vrf, afi);
 163                 }
 164
 165                 vpn_leak_from_vrf_update_all(bgp_vpn, bgp_vrf, afi);
 166         }
 167         if (direction == BGP_VPN_POLICY_DIR_TOVPN)
 168                 vpn_leak_from_vrf_update_all(bgp_vpn, bgp_vrf, afi);
 169 }
 170
 171 extern void vpn_policy_routemap_event(const char *rmap_name);
 172
 173 #endif /* _QUAGGA_BGP_MPLSVPN_H */