bgpd/bgp_vpn.c

   1 /* VPN Related functions
   2  * Copyright (C) 2017 6WIND
   3  *
   4  * This file is part of FRRouting
   5  *
   6  * FRRouting 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  * FRRouting 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 #include <zebra.h>
  22 #include "command.h"
  23 #include "prefix.h"
  24 #include "lib/json.h"
  25
  26 #include "bgpd/bgpd.h"
  27 #include "bgpd/bgp_route.h"
  28 #include "bgpd/bgp_table.h"
  29 #include "bgpd/bgp_attr.h"
  30 #include "bgpd/bgp_mplsvpn.h"
  31 #include "bgpd/bgp_vpn.h"
  32 #include "bgpd/bgp_updgrp.h"
  33
  34 int show_adj_route_vpn(struct vty *vty, struct peer *peer,
  35                        struct prefix_rd *prd, afi_t afi, safi_t safi,
  36                        bool use_json)
  37 {
  38         struct bgp *bgp;
  39         struct bgp_table *table;
  40         struct bgp_dest *dest;
  41         struct bgp_dest *rm;
  42         int rd_header;
  43         int header = 1;
  44         json_object *json = NULL;
  45         json_object *json_scode = NULL;
  46         json_object *json_ocode = NULL;
  47         json_object *json_adv = NULL;
  48         json_object *json_routes = NULL;
  49         char rd_str[BUFSIZ];
  50         unsigned long output_count = 0;
  51
  52         bgp = bgp_get_default();
  53         if (bgp == NULL) {
  54                 if (!use_json)
  55                         vty_out(vty, "No BGP process is configured\n");
  56                 else
  57                         vty_out(vty, "{}\n");
  58                 return CMD_WARNING;
  59         }
  60
  61         if (use_json) {
  62                 json_scode = json_object_new_object();
  63                 json_ocode = json_object_new_object();
  64                 json = json_object_new_object();
  65                 json_adv = json_object_new_object();
  66
  67                 json_object_string_add(json_scode, "suppressed", "s");
  68                 json_object_string_add(json_scode, "damped", "d");
  69                 json_object_string_add(json_scode, "history", "h");
  70                 json_object_string_add(json_scode, "valid", "*");
  71                 json_object_string_add(json_scode, "best", ">");
  72                 json_object_string_add(json_scode, "internal", "i");
  73
  74                 json_object_string_add(json_ocode, "igp", "i");
  75                 json_object_string_add(json_ocode, "egp", "e");
  76                 json_object_string_add(json_ocode, "incomplete", "?");
  77         }
  78
  79         for (dest = bgp_table_top(bgp->rib[afi][safi]); dest;
  80              dest = bgp_route_next(dest)) {
  81                 const struct prefix *dest_p = bgp_dest_get_prefix(dest);
  82
  83                 if (prd && memcmp(dest_p->u.val, prd->val, 8) != 0)
  84                         continue;
  85
  86                 table = bgp_dest_get_bgp_table_info(dest);
  87                 if (table == NULL)
  88                         continue;
  89
  90                 /*
  91                  * Initialize variables for each RD
  92                  * All prefixes under an RD is aggregated within "json_routes"
  93                  */
  94                 rd_header = 1;
  95                 memset(rd_str, 0, sizeof(rd_str));
  96                 json_routes = NULL;
  97
  98                 for (rm = bgp_table_top(table); rm; rm = bgp_route_next(rm)) {
  99                         struct bgp_adj_out *adj = NULL;
 100                         struct attr *attr = NULL;
 101                         struct peer_af *paf = NULL;
 102
 103                         RB_FOREACH (adj, bgp_adj_out_rb, &rm->adj_out)
 104                                 SUBGRP_FOREACH_PEER (adj->subgroup, paf) {
 105                                         if (paf->peer != peer || !adj->attr)
 106                                                 continue;
 107
 108                                         attr = adj->attr;
 109                                         break;
 110                         }
 111
 112                         if (bgp_dest_get_bgp_path_info(rm) == NULL)
 113                                 continue;
 114
 115                         if (!attr)
 116                                 continue;
 117
 118                         if (header) {
 119                                 if (use_json) {
 120                                         json_object_int_add(
 121                                                 json, "bgpTableVersion", 0);
 122                                         json_object_string_add(
 123                                                 json, "bgpLocalRouterId",
 124                                                 inet_ntoa(bgp->router_id));
 125                                         json_object_int_add(
 126                                                 json,
 127                                                 "defaultLocPrf",
 128                                                 bgp->default_local_pref);
 129                                         json_object_int_add(
 130                                                 json, "localAS",
 131                                                 bgp->as);
 132                                         json_object_object_add(json,
 133                                                                "bgpStatusCodes",
 134                                                                json_scode);
 135                                         json_object_object_add(json,
 136                                                                "bgpOriginCodes",
 137                                                                json_ocode);
 138                                 } else {
 139                                         vty_out(vty,
 140                                                 "BGP table version is 0, local router ID is %s\n",
 141                                                 inet_ntoa(bgp->router_id));
 142                                         vty_out(vty, "Default local pref %u, ",
 143                                                 bgp->default_local_pref);
 144                                         vty_out(vty, "local AS %u\n", bgp->as);
 145                                         vty_out(vty,
 146                                                 "Status codes: s suppressed, d damped, h history, * valid, > best, i - internal\n");
 147                                         vty_out(vty,
 148                                                 "Origin codes: i - IGP, e - EGP, ? - incomplete\n\n");
 149                                         vty_out(vty, V4_HEADER);
 150                                 }
 151                                 header = 0;
 152                         }
 153
 154                         if (rd_header) {
 155                                 uint16_t type;
 156                                 struct rd_as rd_as = {0};
 157                                 struct rd_ip rd_ip = {0};
 158 #ifdef ENABLE_BGP_VNC
 159                                 struct rd_vnc_eth rd_vnc_eth = {0};
 160 #endif
 161                                 const uint8_t *pnt;
 162
 163                                 pnt = dest_p->u.val;
 164
 165                                 /* Decode RD type. */
 166                                 type = decode_rd_type(pnt);
 167                                 /* Decode RD value. */
 168                                 if (type == RD_TYPE_AS)
 169                                         decode_rd_as(pnt + 2, &rd_as);
 170                                 else if (type == RD_TYPE_AS4)
 171                                         decode_rd_as4(pnt + 2, &rd_as);
 172                                 else if (type == RD_TYPE_IP)
 173                                         decode_rd_ip(pnt + 2, &rd_ip);
 174 #ifdef ENABLE_BGP_VNC
 175                                 else if (type == RD_TYPE_VNC_ETH)
 176                                         decode_rd_vnc_eth(pnt, &rd_vnc_eth);
 177 #endif
 178                                 if (use_json) {
 179                                         json_routes = json_object_new_object();
 180
 181                                         if (type == RD_TYPE_AS
 182                                             || type == RD_TYPE_AS4)
 183                                                 snprintf(rd_str, sizeof(rd_str),
 184                                                          "%u:%d", rd_as.as,
 185                                                          rd_as.val);
 186                                         else if (type == RD_TYPE_IP)
 187                                                 snprintf(rd_str, sizeof(rd_str),
 188                                                          "%s:%d",
 189                                                          inet_ntoa(rd_ip.ip),
 190                                                          rd_ip.val);
 191                                         json_object_string_add(
 192                                                 json_routes,
 193                                                 "rd", rd_str);
 194                                 } else {
 195                                         vty_out(vty, "Route Distinguisher: ");
 196
 197                                         if (type == RD_TYPE_AS
 198                                             || type == RD_TYPE_AS4)
 199                                                 vty_out(vty, "%u:%d", rd_as.as,
 200                                                         rd_as.val);
 201                                         else if (type == RD_TYPE_IP)
 202                                                 vty_out(vty, "%s:%d",
 203                                                         inet_ntoa(rd_ip.ip),
 204                                                         rd_ip.val);
 205 #ifdef ENABLE_BGP_VNC
 206                                         else if (type == RD_TYPE_VNC_ETH)
 207                                                 vty_out(vty,
 208                                                         "%u:%02x:%02x:%02x:%02x:%02x:%02x",
 209                                                         rd_vnc_eth.local_nve_id,
 210                                                         rd_vnc_eth.macaddr
 211                                                                 .octet[0],
 212                                                         rd_vnc_eth.macaddr
 213                                                                 .octet[1],
 214                                                         rd_vnc_eth.macaddr
 215                                                                 .octet[2],
 216                                                         rd_vnc_eth.macaddr
 217                                                                 .octet[3],
 218                                                         rd_vnc_eth.macaddr
 219                                                                 .octet[4],
 220                                                         rd_vnc_eth.macaddr
 221                                                                 .octet[5]);
 222 #endif
 223
 224                                         vty_out(vty, "\n");
 225                                 }
 226                                 rd_header = 0;
 227                         }
 228                         route_vty_out_tmp(vty, bgp_dest_get_prefix(rm), attr,
 229                                           safi, use_json, json_routes, false);
 230                         output_count++;
 231                 }
 232
 233                 if (use_json && json_routes)
 234                         json_object_object_add(json_adv, rd_str, json_routes);
 235         }
 236
 237         if (use_json) {
 238                 json_object_object_add(json, "advertisedRoutes", json_adv);
 239                 json_object_int_add(json,
 240                         "totalPrefixCounter", output_count);
 241                 vty_out(vty, "%s\n", json_object_to_json_string_ext(
 242                                              json, JSON_C_TO_STRING_PRETTY));
 243                 json_object_free(json);
 244         } else
 245                 vty_out(vty, "\nTotal number of prefixes %ld\n", output_count);
 246
 247         return CMD_SUCCESS;
 248 }