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->vrf_id = VRF_DEFAULT;
  61                 api_nh->gate.ipv6 = rinfo->nexthop;
  62                 api_nh->ifindex = rinfo->ifindex;
  63                 api_nh->type = NEXTHOP_TYPE_IPV6_IFINDEX;
  64                 count++;
  65                 if (cmd == ZEBRA_ROUTE_ADD)
  66                         SET_FLAG(rinfo->flags, RIPNG_RTF_FIB);
  67                 else
  68                         UNSET_FLAG(rinfo->flags, RIPNG_RTF_FIB);
  69         }
  70
  71         api.nexthop_num = count;
  72
  73         rinfo = listgetdata(listhead(list));
  74
  75         SET_FLAG(api.message, ZAPI_MESSAGE_METRIC);
  76         api.metric = rinfo->metric;
  77
  78         if (rinfo->tag) {
  79                 SET_FLAG(api.message, ZAPI_MESSAGE_TAG);
  80                 api.tag = rinfo->tag;
  81         }
  82
  83         zclient_route_send(cmd, zclient, &api);
  84
  85         if (IS_RIPNG_DEBUG_ZEBRA) {
  86                 if (ripng->ecmp)
  87                         zlog_debug("%s: %s/%d nexthops %d",
  88                                    (cmd == ZEBRA_ROUTE_ADD)
  89                                            ? "Install into zebra"
  90                                            : "Delete from zebra",
  91                                    inet6_ntoa(rp->p.u.prefix6), rp->p.prefixlen,
  92                                    count);
  93                 else
  94                         zlog_debug(
  95                                 "%s: %s/%d",
  96                                 (cmd == ZEBRA_ROUTE_ADD) ? "Install into zebra"
  97                                                          : "Delete from zebra",
  98                                 inet6_ntoa(rp->p.u.prefix6), rp->p.prefixlen);
  99         }
 100 }
 101
 102 /* Add/update ECMP routes to zebra. */
 103 void ripng_zebra_ipv6_add(struct route_node *rp)
 104 {
 105         ripng_zebra_ipv6_send(rp, ZEBRA_ROUTE_ADD);
 106 }
 107
 108 /* Delete ECMP routes from zebra. */
 109 void ripng_zebra_ipv6_delete(struct route_node *rp)
 110 {
 111         ripng_zebra_ipv6_send(rp, ZEBRA_ROUTE_DELETE);
 112 }
 113
 114 /* Zebra route add and delete treatment. */
 115 static int ripng_zebra_read_route(int command, struct zclient *zclient,
 116                                   zebra_size_t length, vrf_id_t vrf_id)
 117 {
 118         struct zapi_route api;
 119         struct in6_addr nexthop;
 120         unsigned long ifindex;
 121
 122         if (zapi_route_decode(zclient->ibuf, &api) < 0)
 123                 return -1;
 124
 125         /* we completely ignore srcdest routes for now. */
 126         if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
 127                 return 0;
 128
 129         nexthop = api.nexthops[0].gate.ipv6;
 130         ifindex = api.nexthops[0].ifindex;
 131
 132         if (command == ZEBRA_REDISTRIBUTE_ROUTE_ADD)
 133                 ripng_redistribute_add(api.type, RIPNG_ROUTE_REDISTRIBUTE,
 134                                        (struct prefix_ipv6 *)&api.prefix,
 135                                        ifindex, &nexthop, api.tag);
 136         else
 137                 ripng_redistribute_delete(api.type, RIPNG_ROUTE_REDISTRIBUTE,
 138                                           (struct prefix_ipv6 *)&api.prefix,
 139                                           ifindex);
 140
 141         return 0;
 142 }
 143
 144 void ripng_zclient_reset(void)
 145 {
 146         zclient_reset(zclient);
 147 }
 148
 149 static int ripng_redistribute_unset(int type)
 150 {
 151
 152         if (!vrf_bitmap_check(zclient->redist[AFI_IP6][type], VRF_DEFAULT))
 153                 return CMD_SUCCESS;
 154
 155         vrf_bitmap_set(zclient->redist[AFI_IP6][type], VRF_DEFAULT);
 156
 157         if (zclient->sock > 0)
 158                 zebra_redistribute_send(ZEBRA_REDISTRIBUTE_DELETE, zclient,
 159                                         AFI_IP6, type, 0, VRF_DEFAULT);
 160
 161         ripng_redistribute_withdraw(type);
 162
 163         return CMD_SUCCESS;
 164 }
 165
 166 int ripng_redistribute_check(int type)
 167 {
 168         return vrf_bitmap_check(zclient->redist[AFI_IP6][type], VRF_DEFAULT);
 169 }
 170
 171 static void ripng_redistribute_metric_set(int type, int metric)
 172 {
 173         ripng->route_map[type].metric_config = 1;
 174         ripng->route_map[type].metric = metric;
 175 }
 176
 177 static int ripng_redistribute_metric_unset(int type)
 178 {
 179         ripng->route_map[type].metric_config = 0;
 180         ripng->route_map[type].metric = 0;
 181         return 0;
 182 }
 183
 184 static void ripng_redistribute_routemap_set(int type, const char *name)
 185 {
 186         if (ripng->route_map[type].name)
 187                 free(ripng->route_map[type].name);
 188
 189         ripng->route_map[type].name = strdup(name);
 190         ripng->route_map[type].map = route_map_lookup_by_name(name);
 191 }
 192
 193 static void ripng_redistribute_routemap_unset(int type)
 194 {
 195         if (ripng->route_map[type].name)
 196                 free(ripng->route_map[type].name);
 197
 198         ripng->route_map[type].name = NULL;
 199         ripng->route_map[type].map = NULL;
 200 }
 201
 202 /* Redistribution types */
 203 static struct {
 204         int type;
 205         int str_min_len;
 206         const char *str;
 207 } redist_type[] = {{ZEBRA_ROUTE_KERNEL, 1, "kernel"},
 208                    {ZEBRA_ROUTE_CONNECT, 1, "connected"},
 209                    {ZEBRA_ROUTE_STATIC, 1, "static"},
 210                    {ZEBRA_ROUTE_OSPF6, 1, "ospf6"},
 211                    {ZEBRA_ROUTE_BGP, 2, "bgp"},
 212                    {ZEBRA_ROUTE_VNC, 1, "vnc"},
 213                    {0, 0, NULL}};
 214
 215 void ripng_redistribute_clean()
 216 {
 217         int i;
 218
 219         for (i = 0; redist_type[i].str; i++) {
 220                 if (vrf_bitmap_check(
 221                             zclient->redist[AFI_IP6][redist_type[i].type],
 222                             VRF_DEFAULT)) {
 223                         if (zclient->sock > 0)
 224                                 zebra_redistribute_send(
 225                                         ZEBRA_REDISTRIBUTE_DELETE, zclient,
 226                                         AFI_IP6, redist_type[i].type, 0,
 227                                         VRF_DEFAULT);
 228
 229                         vrf_bitmap_unset(
 230                                 zclient->redist[AFI_IP6][redist_type[i].type],
 231                                 VRF_DEFAULT);
 232
 233                         /* Remove the routes from RIPng table. */
 234                         ripng_redistribute_withdraw(redist_type[i].type);
 235                 }
 236         }
 237 }
 238
 239 DEFUN (ripng_redistribute_type,
 240        ripng_redistribute_type_cmd,
 241        "redistribute " FRR_REDIST_STR_RIPNGD,
 242        "Redistribute\n"
 243        FRR_REDIST_HELP_STR_RIPNGD)
 244 {
 245         int type;
 246
 247         char *proto = argv[argc - 1]->text;
 248         type = proto_redistnum(AFI_IP6, proto);
 249
 250         if (type < 0) {
 251                 vty_out(vty, "Invalid type %s\n", proto);
 252                 return CMD_WARNING_CONFIG_FAILED;
 253         }
 254
 255         zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP6, type, 0,
 256                              VRF_DEFAULT);
 257         return CMD_SUCCESS;
 258 }
 259
 260 DEFUN (no_ripng_redistribute_type,
 261        no_ripng_redistribute_type_cmd,
 262        "no redistribute " FRR_REDIST_STR_RIPNGD " [metric (0-16)] [route-map WORD]",
 263        NO_STR
 264        "Redistribute\n"
 265        FRR_REDIST_HELP_STR_RIPNGD
 266        "Metric\n"
 267        "Metric value\n"
 268        "Route map reference\n"
 269        "Pointer to route-map entries\n")
 270 {
 271         int type;
 272
 273         char *proto = argv[2]->text;
 274         type = proto_redistnum(AFI_IP6, proto);
 275
 276         if (type < 0) {
 277                 vty_out(vty, "Invalid type %s\n", proto);
 278                 return CMD_WARNING_CONFIG_FAILED;
 279         }
 280
 281         ripng_redistribute_metric_unset(type);
 282         ripng_redistribute_routemap_unset(type);
 283         return ripng_redistribute_unset(type);
 284 }
 285
 286
 287 DEFUN (ripng_redistribute_type_metric,
 288        ripng_redistribute_type_metric_cmd,
 289        "redistribute " FRR_REDIST_STR_RIPNGD " metric (0-16)",
 290        "Redistribute\n"
 291        FRR_REDIST_HELP_STR_RIPNGD
 292        "Metric\n"
 293        "Metric value\n")
 294 {
 295         int idx_protocol = 1;
 296         int idx_number = 3;
 297         int type;
 298         int metric;
 299
 300         metric = atoi(argv[idx_number]->arg);
 301         type = proto_redistnum(AFI_IP6, argv[idx_protocol]->text);
 302
 303         if (type < 0) {
 304                 vty_out(vty, "Invalid type %s\n", argv[idx_protocol]->text);
 305                 return CMD_WARNING_CONFIG_FAILED;
 306         }
 307
 308         ripng_redistribute_metric_set(type, metric);
 309         zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP6, type, 0,
 310                              VRF_DEFAULT);
 311         return CMD_SUCCESS;
 312 }
 313
 314 DEFUN (ripng_redistribute_type_routemap,
 315        ripng_redistribute_type_routemap_cmd,
 316        "redistribute " FRR_REDIST_STR_RIPNGD " route-map WORD",
 317        "Redistribute\n"
 318        FRR_REDIST_HELP_STR_RIPNGD
 319        "Route map reference\n"
 320        "Pointer to route-map entries\n")
 321 {
 322         int idx_protocol = 1;
 323         int idx_word = 3;
 324         int type;
 325
 326         type = proto_redistnum(AFI_IP6, argv[idx_protocol]->text);
 327
 328         if (type < 0) {
 329                 vty_out(vty, "Invalid type %s\n", argv[idx_protocol]->text);
 330                 return CMD_WARNING_CONFIG_FAILED;
 331         }
 332
 333         ripng_redistribute_routemap_set(type, argv[idx_word]->text);
 334         zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP6, type, 0,
 335                              VRF_DEFAULT);
 336         return CMD_SUCCESS;
 337 }
 338
 339 DEFUN (ripng_redistribute_type_metric_routemap,
 340        ripng_redistribute_type_metric_routemap_cmd,
 341        "redistribute " FRR_REDIST_STR_RIPNGD " metric (0-16) route-map WORD",
 342        "Redistribute\n"
 343        FRR_REDIST_HELP_STR_RIPNGD
 344        "Metric\n"
 345        "Metric value\n"
 346        "Route map reference\n"
 347        "Pointer to route-map entries\n")
 348 {
 349         int idx_protocol = 1;
 350         int idx_number = 3;
 351         int idx_word = 5;
 352         int type;
 353         int metric;
 354
 355         type = proto_redistnum(AFI_IP6, argv[idx_protocol]->text);
 356         metric = atoi(argv[idx_number]->arg);
 357
 358         if (type < 0) {
 359                 vty_out(vty, "Invalid type %s\n", argv[idx_protocol]->text);
 360                 return CMD_WARNING_CONFIG_FAILED;
 361         }
 362
 363         ripng_redistribute_metric_set(type, metric);
 364         ripng_redistribute_routemap_set(type, argv[idx_word]->text);
 365         zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP6, type, 0,
 366                              VRF_DEFAULT);
 367         return CMD_SUCCESS;
 368 }
 369
 370 void ripng_redistribute_write(struct vty *vty, int config_mode)
 371 {
 372         int i;
 373
 374         for (i = 0; i < ZEBRA_ROUTE_MAX; i++) {
 375                 if (i == zclient->redist_default
 376                     || !vrf_bitmap_check(zclient->redist[AFI_IP6][i],
 377                                          VRF_DEFAULT))
 378                         continue;
 379
 380                 if (!config_mode) {
 381                         vty_out(vty, "    %s", zebra_route_string(i));
 382                         continue;
 383                 }
 384
 385                 if (ripng->route_map[i].metric_config) {
 386                         if (ripng->route_map[i].name)
 387                                 vty_out(vty,
 388                                         " redistribute %s metric %d route-map %s\n",
 389                                         zebra_route_string(i),
 390                                         ripng->route_map[i].metric,
 391                                         ripng->route_map[i].name);
 392                         else
 393                                 vty_out(vty, " redistribute %s metric %d\n",
 394                                         zebra_route_string(i),
 395                                         ripng->route_map[i].metric);
 396                 } else {
 397                         if (ripng->route_map[i].name)
 398                                 vty_out(vty, " redistribute %s route-map %s\n",
 399                                         zebra_route_string(i),
 400                                         ripng->route_map[i].name);
 401                         else
 402                                 vty_out(vty, " redistribute %s\n",
 403                                         zebra_route_string(i));
 404                 }
 405         }
 406 }
 407
 408 static void ripng_zebra_connected(struct zclient *zclient)
 409 {
 410         zclient_send_reg_requests(zclient, VRF_DEFAULT);
 411 }
 412
 413 /* Initialize zebra structure and it's commands. */
 414 void zebra_init(struct thread_master *master)
 415 {
 416         /* Allocate zebra structure. */
 417         zclient = zclient_new_notify(master, &zclient_options_default);
 418         zclient_init(zclient, ZEBRA_ROUTE_RIPNG, 0, &ripngd_privs);
 419
 420         zclient->zebra_connected = ripng_zebra_connected;
 421         zclient->interface_up = ripng_interface_up;
 422         zclient->interface_down = ripng_interface_down;
 423         zclient->interface_add = ripng_interface_add;
 424         zclient->interface_delete = ripng_interface_delete;
 425         zclient->interface_address_add = ripng_interface_address_add;
 426         zclient->interface_address_delete = ripng_interface_address_delete;
 427         zclient->redistribute_route_add = ripng_zebra_read_route;
 428         zclient->redistribute_route_del = ripng_zebra_read_route;
 429
 430         /* Install command elements to ripng node */
 431         install_element(RIPNG_NODE, &ripng_redistribute_type_cmd);
 432         install_element(RIPNG_NODE, &ripng_redistribute_type_routemap_cmd);
 433         install_element(RIPNG_NODE, &ripng_redistribute_type_metric_cmd);
 434         install_element(RIPNG_NODE,
 435                         &ripng_redistribute_type_metric_routemap_cmd);
 436         install_element(RIPNG_NODE, &no_ripng_redistribute_type_cmd);
 437 }
 438
 439 void ripng_zebra_stop(void)
 440 {
 441         zclient_stop(zclient);
 442         zclient_free(zclient);
 443 }