ripngd/ripng_zebra.c

   1 /*
   2  * RIPngd and zebra interface.
   3  * Copyright (C) 1998, 1999 Kunihiro Ishiguro
   4  *
   5  * This file is part of GNU Zebra.
   6  *
   7  * GNU Zebra is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2, or (at your option) any
  10  * later version.
  11  *
  12  * GNU Zebra is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; see the file COPYING; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include <zebra.h>
  23
  24 #include "command.h"
  25 #include "prefix.h"
  26 #include "table.h"
  27 #include "stream.h"
  28 #include "memory.h"
  29 #include "routemap.h"
  30 #include "zclient.h"
  31 #include "log.h"
  32
  33 #include "ripngd/ripngd.h"
  34 #include "ripngd/ripng_debug.h"
  35
  36 /* All information about zebra. */
  37 struct zclient *zclient = NULL;
  38
  39 /* Send ECMP routes to zebra. */
  40 static void ripng_zebra_ipv6_send(struct route_node *rp, u_char cmd)
  41 {
  42         struct list *list = (struct list *)rp->info;
  43         struct zapi_route api;
  44         struct zapi_nexthop *api_nh;
  45         struct listnode *listnode = NULL;
  46         struct ripng_info *rinfo = NULL;
  47         int count = 0;
  48
  49         memset(&api, 0, sizeof(api));
  50         api.vrf_id = VRF_DEFAULT;
  51         api.type = ZEBRA_ROUTE_RIPNG;
  52         api.safi = SAFI_UNICAST;
  53         api.prefix = rp->p;
  54
  55         SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
  56         for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) {
  57                 if (count >= MULTIPATH_NUM)
  58                         break;
  59                 api_nh = &api.nexthops[count];
  60                 api_nh->gate.ipv6 = rinfo->nexthop;
  61                 api_nh->ifindex = rinfo->ifindex;
  62                 api_nh->type = NEXTHOP_TYPE_IPV6_IFINDEX;
  63                 count++;
  64                 if (cmd == ZEBRA_ROUTE_ADD)
  65                         SET_FLAG(rinfo->flags, RIPNG_RTF_FIB);
  66                 else
  67                         UNSET_FLAG(rinfo->flags, RIPNG_RTF_FIB);
  68         }
  69
  70         api.nexthop_num = count;
  71
  72         rinfo = listgetdata(listhead(list));
  73
  74         SET_FLAG(api.message, ZAPI_MESSAGE_METRIC);
  75         api.metric = rinfo->metric;
  76
  77         if (rinfo->tag) {
  78                 SET_FLAG(api.message, ZAPI_MESSAGE_TAG);
  79                 api.tag = rinfo->tag;
  80         }
  81
  82         zclient_route_send(cmd, zclient, &api);
  83
  84         if (IS_RIPNG_DEBUG_ZEBRA) {
  85                 if (ripng->ecmp)
  86                         zlog_debug("%s: %s/%d nexthops %d",
  87                                    (cmd == ZEBRA_ROUTE_ADD)
  88                                            ? "Install into zebra"
  89                                            : "Delete from zebra",
  90                                    inet6_ntoa(rp->p.u.prefix6), rp->p.prefixlen,
  91                                    count);
  92                 else
  93                         zlog_debug(
  94                                 "%s: %s/%d",
  95                                 (cmd == ZEBRA_ROUTE_ADD) ? "Install into zebra"
  96                                                          : "Delete from zebra",
  97                                 inet6_ntoa(rp->p.u.prefix6), rp->p.prefixlen);
  98         }
  99 }
 100
 101 /* Add/update ECMP routes to zebra. */
 102 void ripng_zebra_ipv6_add(struct route_node *rp)
 103 {
 104         ripng_zebra_ipv6_send(rp, ZEBRA_ROUTE_ADD);
 105 }
 106
 107 /* Delete ECMP routes from zebra. */
 108 void ripng_zebra_ipv6_delete(struct route_node *rp)
 109 {
 110         ripng_zebra_ipv6_send(rp, ZEBRA_ROUTE_DELETE);
 111 }
 112
 113 /* Zebra route add and delete treatment. */
 114 static int ripng_zebra_read_route(int command, struct zclient *zclient,
 115                                   zebra_size_t length, vrf_id_t vrf_id)
 116 {
 117         struct zapi_route api;
 118         struct in6_addr nexthop;
 119         unsigned long ifindex;
 120
 121         if (zapi_route_decode(zclient->ibuf, &api) < 0)
 122                 return -1;
 123
 124         /* we completely ignore srcdest routes for now. */
 125         if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
 126                 return 0;
 127
 128         nexthop = api.nexthops[0].gate.ipv6;
 129         ifindex = api.nexthops[0].ifindex;
 130
 131         if (command == ZEBRA_REDISTRIBUTE_ROUTE_ADD)
 132                 ripng_redistribute_add(api.type, RIPNG_ROUTE_REDISTRIBUTE,
 133                                        (struct prefix_ipv6 *)&api.prefix,
 134                                        ifindex, &nexthop, api.tag);
 135         else
 136                 ripng_redistribute_delete(api.type, RIPNG_ROUTE_REDISTRIBUTE,
 137                                           (struct prefix_ipv6 *)&api.prefix,
 138                                           ifindex);
 139
 140         return 0;
 141 }
 142
 143 void ripng_zclient_reset(void)
 144 {
 145         zclient_reset(zclient);
 146 }
 147
 148 static int ripng_redistribute_unset(int type)
 149 {
 150
 151         if (!vrf_bitmap_check(zclient->redist[AFI_IP6][type], VRF_DEFAULT))
 152                 return CMD_SUCCESS;
 153
 154         vrf_bitmap_set(zclient->redist[AFI_IP6][type], VRF_DEFAULT);
 155
 156         if (zclient->sock > 0)
 157                 zebra_redistribute_send(ZEBRA_REDISTRIBUTE_DELETE, zclient,
 158                                         AFI_IP6, type, 0, VRF_DEFAULT);
 159
 160         ripng_redistribute_withdraw(type);
 161
 162         return CMD_SUCCESS;
 163 }
 164
 165 int ripng_redistribute_check(int type)
 166 {
 167         return vrf_bitmap_check(zclient->redist[AFI_IP6][type], VRF_DEFAULT);
 168 }
 169
 170 static void ripng_redistribute_metric_set(int type, int metric)
 171 {
 172         ripng->route_map[type].metric_config = 1;
 173         ripng->route_map[type].metric = metric;
 174 }
 175
 176 static int ripng_redistribute_metric_unset(int type)
 177 {
 178         ripng->route_map[type].metric_config = 0;
 179         ripng->route_map[type].metric = 0;
 180         return 0;
 181 }
 182
 183 static void ripng_redistribute_routemap_set(int type, const char *name)
 184 {
 185         if (ripng->route_map[type].name)
 186                 free(ripng->route_map[type].name);
 187
 188         ripng->route_map[type].name = strdup(name);
 189         ripng->route_map[type].map = route_map_lookup_by_name(name);
 190 }
 191
 192 static void ripng_redistribute_routemap_unset(int type)
 193 {
 194         if (ripng->route_map[type].name)
 195                 free(ripng->route_map[type].name);
 196
 197         ripng->route_map[type].name = NULL;
 198         ripng->route_map[type].map = NULL;
 199 }
 200
 201 /* Redistribution types */
 202 static struct {
 203         int type;
 204         int str_min_len;
 205         const char *str;
 206 } redist_type[] = {{ZEBRA_ROUTE_KERNEL, 1, "kernel"},
 207                    {ZEBRA_ROUTE_CONNECT, 1, "connected"},
 208                    {ZEBRA_ROUTE_STATIC, 1, "static"},
 209                    {ZEBRA_ROUTE_OSPF6, 1, "ospf6"},
 210                    {ZEBRA_ROUTE_BGP, 2, "bgp"},
 211                    {ZEBRA_ROUTE_VNC, 1, "vnc"},
 212                    {0, 0, NULL}};
 213
 214 void ripng_redistribute_clean()
 215 {
 216         int i;
 217
 218         for (i = 0; redist_type[i].str; i++) {
 219                 if (vrf_bitmap_check(
 220                             zclient->redist[AFI_IP6][redist_type[i].type],
 221                             VRF_DEFAULT)) {
 222                         if (zclient->sock > 0)
 223                                 zebra_redistribute_send(
 224                                         ZEBRA_REDISTRIBUTE_DELETE, zclient,
 225                                         AFI_IP6, redist_type[i].type, 0,
 226                                         VRF_DEFAULT);
 227
 228                         vrf_bitmap_unset(
 229                                 zclient->redist[AFI_IP6][redist_type[i].type],
 230                                 VRF_DEFAULT);
 231
 232                         /* Remove the routes from RIPng table. */
 233                         ripng_redistribute_withdraw(redist_type[i].type);
 234                 }
 235         }
 236 }
 237
 238 DEFUN (ripng_redistribute_type,
 239        ripng_redistribute_type_cmd,
 240        "redistribute " FRR_REDIST_STR_RIPNGD,
 241        "Redistribute\n"
 242        FRR_REDIST_HELP_STR_RIPNGD)
 243 {
 244         int type;
 245
 246         char *proto = argv[argc - 1]->text;
 247         type = proto_redistnum(AFI_IP6, proto);
 248
 249         if (type < 0) {
 250                 vty_out(vty, "Invalid type %s\n", proto);
 251                 return CMD_WARNING_CONFIG_FAILED;
 252         }
 253
 254         zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP6, type, 0,
 255                              VRF_DEFAULT);
 256         return CMD_SUCCESS;
 257 }
 258
 259 DEFUN (no_ripng_redistribute_type,
 260        no_ripng_redistribute_type_cmd,
 261        "no redistribute " FRR_REDIST_STR_RIPNGD " [metric (0-16)] [route-map WORD]",
 262        NO_STR
 263        "Redistribute\n"
 264        FRR_REDIST_HELP_STR_RIPNGD
 265        "Metric\n"
 266        "Metric value\n"
 267        "Route map reference\n"
 268        "Pointer to route-map entries\n")
 269 {
 270         int type;
 271
 272         char *proto = argv[2]->text;
 273         type = proto_redistnum(AFI_IP6, proto);
 274
 275         if (type < 0) {
 276                 vty_out(vty, "Invalid type %s\n", proto);
 277                 return CMD_WARNING_CONFIG_FAILED;
 278         }
 279
 280         ripng_redistribute_metric_unset(type);
 281         ripng_redistribute_routemap_unset(type);
 282         return ripng_redistribute_unset(type);
 283 }
 284
 285
 286 DEFUN (ripng_redistribute_type_metric,
 287        ripng_redistribute_type_metric_cmd,
 288        "redistribute " FRR_REDIST_STR_RIPNGD " metric (0-16)",
 289        "Redistribute\n"
 290        FRR_REDIST_HELP_STR_RIPNGD
 291        "Metric\n"
 292        "Metric value\n")
 293 {
 294         int idx_protocol = 1;
 295         int idx_number = 3;
 296         int type;
 297         int metric;
 298
 299         metric = atoi(argv[idx_number]->arg);
 300         type = proto_redistnum(AFI_IP6, argv[idx_protocol]->text);
 301
 302         if (type < 0) {
 303                 vty_out(vty, "Invalid type %s\n", argv[idx_protocol]->text);
 304                 return CMD_WARNING_CONFIG_FAILED;
 305         }
 306
 307         ripng_redistribute_metric_set(type, metric);
 308         zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP6, type, 0,
 309                              VRF_DEFAULT);
 310         return CMD_SUCCESS;
 311 }
 312
 313 DEFUN (ripng_redistribute_type_routemap,
 314        ripng_redistribute_type_routemap_cmd,
 315        "redistribute " FRR_REDIST_STR_RIPNGD " route-map WORD",
 316        "Redistribute\n"
 317        FRR_REDIST_HELP_STR_RIPNGD
 318        "Route map reference\n"
 319        "Pointer to route-map entries\n")
 320 {
 321         int idx_protocol = 1;
 322         int idx_word = 3;
 323         int type;
 324
 325         type = proto_redistnum(AFI_IP6, argv[idx_protocol]->text);
 326
 327         if (type < 0) {
 328                 vty_out(vty, "Invalid type %s\n", argv[idx_protocol]->text);
 329                 return CMD_WARNING_CONFIG_FAILED;
 330         }
 331
 332         ripng_redistribute_routemap_set(type, argv[idx_word]->text);
 333         zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP6, type, 0,
 334                              VRF_DEFAULT);
 335         return CMD_SUCCESS;
 336 }
 337
 338 DEFUN (ripng_redistribute_type_metric_routemap,
 339        ripng_redistribute_type_metric_routemap_cmd,
 340        "redistribute " FRR_REDIST_STR_RIPNGD " metric (0-16) route-map WORD",
 341        "Redistribute\n"
 342        FRR_REDIST_HELP_STR_RIPNGD
 343        "Metric\n"
 344        "Metric value\n"
 345        "Route map reference\n"
 346        "Pointer to route-map entries\n")
 347 {
 348         int idx_protocol = 1;
 349         int idx_number = 3;
 350         int idx_word = 5;
 351         int type;
 352         int metric;
 353
 354         type = proto_redistnum(AFI_IP6, argv[idx_protocol]->text);
 355         metric = atoi(argv[idx_number]->arg);
 356
 357         if (type < 0) {
 358                 vty_out(vty, "Invalid type %s\n", argv[idx_protocol]->text);
 359                 return CMD_WARNING_CONFIG_FAILED;
 360         }
 361
 362         ripng_redistribute_metric_set(type, metric);
 363         ripng_redistribute_routemap_set(type, argv[idx_word]->text);
 364         zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP6, type, 0,
 365                              VRF_DEFAULT);
 366         return CMD_SUCCESS;
 367 }
 368
 369 void ripng_redistribute_write(struct vty *vty, int config_mode)
 370 {
 371         int i;
 372
 373         for (i = 0; i < ZEBRA_ROUTE_MAX; i++) {
 374                 if (i == zclient->redist_default
 375                     || !vrf_bitmap_check(zclient->redist[AFI_IP6][i],
 376                                          VRF_DEFAULT))
 377                         continue;
 378
 379                 if (!config_mode) {
 380                         vty_out(vty, "    %s", zebra_route_string(i));
 381                         continue;
 382                 }
 383
 384                 if (ripng->route_map[i].metric_config) {
 385                         if (ripng->route_map[i].name)
 386                                 vty_out(vty,
 387                                         " redistribute %s metric %d route-map %s\n",
 388                                         zebra_route_string(i),
 389                                         ripng->route_map[i].metric,
 390                                         ripng->route_map[i].name);
 391                         else
 392                                 vty_out(vty, " redistribute %s metric %d\n",
 393                                         zebra_route_string(i),
 394                                         ripng->route_map[i].metric);
 395                 } else {
 396                         if (ripng->route_map[i].name)
 397                                 vty_out(vty, " redistribute %s route-map %s\n",
 398                                         zebra_route_string(i),
 399                                         ripng->route_map[i].name);
 400                         else
 401                                 vty_out(vty, " redistribute %s\n",
 402                                         zebra_route_string(i));
 403                 }
 404         }
 405 }
 406
 407 static void ripng_zebra_connected(struct zclient *zclient)
 408 {
 409         zclient_send_reg_requests(zclient, VRF_DEFAULT);
 410 }
 411
 412 /* Initialize zebra structure and it's commands. */
 413 void zebra_init(struct thread_master *master)
 414 {
 415         /* Allocate zebra structure. */
 416         zclient = zclient_new(master);
 417         zclient_init(zclient, ZEBRA_ROUTE_RIPNG, 0, &ripngd_privs);
 418
 419         zclient->zebra_connected = ripng_zebra_connected;
 420         zclient->interface_up = ripng_interface_up;
 421         zclient->interface_down = ripng_interface_down;
 422         zclient->interface_add = ripng_interface_add;
 423         zclient->interface_delete = ripng_interface_delete;
 424         zclient->interface_address_add = ripng_interface_address_add;
 425         zclient->interface_address_delete = ripng_interface_address_delete;
 426         zclient->redistribute_route_add = ripng_zebra_read_route;
 427         zclient->redistribute_route_del = ripng_zebra_read_route;
 428
 429         /* Install command elements to ripng node */
 430         install_element(RIPNG_NODE, &ripng_redistribute_type_cmd);
 431         install_element(RIPNG_NODE, &ripng_redistribute_type_routemap_cmd);
 432         install_element(RIPNG_NODE, &ripng_redistribute_type_metric_cmd);
 433         install_element(RIPNG_NODE,
 434                         &ripng_redistribute_type_metric_routemap_cmd);
 435         install_element(RIPNG_NODE, &no_ripng_redistribute_type_cmd);
 436 }
 437
 438 void ripng_zebra_stop(void)
 439 {
 440         zclient_stop(zclient);
 441         zclient_free(zclient);
 442 }