pimd/pimd.c

   1 /*
   2  * PIM for Quagga
   3  * Copyright (C) 2008  Everton da Silva Marques
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; see the file COPYING; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  18  */
  19
  20 #include <zebra.h>
  21
  22 #include "log.h"
  23 #include "memory.h"
  24 #include "if.h"
  25 #include "prefix.h"
  26 #include "vty.h"
  27 #include "plist.h"
  28 #include "hash.h"
  29 #include "jhash.h"
  30 #include "vrf.h"
  31
  32 #include "pimd.h"
  33 #include "pim_cmd.h"
  34 #include "pim_iface.h"
  35 #include "pim_zebra.h"
  36 #include "pim_str.h"
  37 #include "pim_oil.h"
  38 #include "pim_pim.h"
  39 #include "pim_upstream.h"
  40 #include "pim_rpf.h"
  41 #include "pim_ssmpingd.h"
  42 #include "pim_static.h"
  43 #include "pim_rp.h"
  44 #include "pim_ssm.h"
  45 #include "pim_zlookup.h"
  46 #include "pim_nht.h"
  47
  48 const char *const PIM_ALL_SYSTEMS      = MCAST_ALL_SYSTEMS;
  49 const char *const PIM_ALL_ROUTERS      = MCAST_ALL_ROUTERS;
  50 const char *const PIM_ALL_PIM_ROUTERS  = MCAST_ALL_PIM_ROUTERS;
  51 const char *const PIM_ALL_IGMP_ROUTERS = MCAST_ALL_IGMP_ROUTERS;
  52
  53 struct thread_master     *master = NULL;
  54 uint32_t                  qpim_debugs = 0;
  55 int                       qpim_mroute_socket_fd = -1;
  56 int64_t                   qpim_mroute_socket_creation = 0; /* timestamp of creation */
  57 int                       qpim_t_periodic = PIM_DEFAULT_T_PERIODIC; /* Period between Join/Prune Messages */
  58 struct pim_assert_metric  qpim_infinite_assert_metric;
  59 long                      qpim_rpf_cache_refresh_delay_msec = 50;
  60 struct thread            *qpim_rpf_cache_refresher = NULL;
  61 int64_t                   qpim_rpf_cache_refresh_requests = 0;
  62 int64_t                   qpim_rpf_cache_refresh_events = 0;
  63 int64_t                   qpim_rpf_cache_refresh_last =  0;
  64 struct list              *qpim_ssmpingd_list = NULL;
  65 struct in_addr            qpim_ssmpingd_group_addr;
  66 int64_t                   qpim_scan_oil_events = 0;
  67 int64_t                   qpim_scan_oil_last = 0;
  68 int64_t                   qpim_mroute_add_events = 0;
  69 int64_t                   qpim_mroute_add_last = 0;
  70 int64_t                   qpim_mroute_del_events = 0;
  71 int64_t                   qpim_mroute_del_last = 0;
  72 struct list              *qpim_static_route_list = NULL;
  73 unsigned int              qpim_keep_alive_time = PIM_KEEPALIVE_PERIOD;
  74 signed int                qpim_rp_keep_alive_time = 0;
  75 int64_t                   qpim_nexthop_lookups = 0;
  76 int                       qpim_packet_process = PIM_DEFAULT_PACKET_PROCESS;
  77 uint8_t                   qpim_ecmp_enable = 0;
  78 uint8_t                   qpim_ecmp_rebalance_enable = 0;
  79 struct pim_instance       *pimg = NULL;
  80
  81 int32_t qpim_register_suppress_time = PIM_REGISTER_SUPPRESSION_TIME_DEFAULT;
  82 int32_t qpim_register_probe_time = PIM_REGISTER_PROBE_TIME_DEFAULT;
  83
  84 static struct pim_instance *pim_instance_init (vrf_id_t vrf_id, afi_t afi);
  85 static void pim_instance_terminate (void);
  86
  87 static int
  88 pim_vrf_new (struct vrf *vrf)
  89 {
  90   zlog_debug ("VRF Created: %s(%d)", vrf->name, vrf->vrf_id);
  91   return 0;
  92 }
  93
  94 static int
  95 pim_vrf_delete (struct vrf *vrf)
  96 {
  97   zlog_debug ("VRF Deletion: %s(%d)", vrf->name, vrf->vrf_id);
  98   return 0;
  99 }
 100
 101 static int
 102 pim_vrf_enable (struct vrf *vrf)
 103 {
 104
 105   if (!vrf) // unexpected
 106     return -1;
 107
 108   if (vrf->vrf_id == VRF_DEFAULT)
 109     {
 110       pimg = pim_instance_init (VRF_DEFAULT, AFI_IP);
 111       if (pimg == NULL)
 112         {
 113           zlog_err ("%s %s: pim class init failure ", __FILE__,
 114                     __PRETTY_FUNCTION__);
 115           /*
 116            * We will crash and burn otherwise
 117            */
 118           exit(1);
 119       }
 120
 121     pimg->send_v6_secondary = 1;
 122
 123     }
 124   return 0;
 125 }
 126
 127 static int
 128 pim_vrf_disable (struct vrf *vrf)
 129 {
 130   if (vrf->vrf_id == VRF_DEFAULT)
 131     return 0;
 132
 133   if (vrf->vrf_id == VRF_DEFAULT)
 134     pim_instance_terminate ();
 135
 136   /* Note: This is a callback, the VRF will be deleted by the caller. */
 137   return 0;
 138 }
 139
 140 void
 141 pim_vrf_init (void)
 142 {
 143   vrf_init (pim_vrf_new,
 144             pim_vrf_enable,
 145             pim_vrf_disable,
 146             pim_vrf_delete);
 147 }
 148
 149 static void
 150 pim_vrf_terminate (void)
 151 {
 152   vrf_terminate ();
 153 }
 154
 155 /* Key generate for pim->rpf_hash */
 156 static unsigned int
 157 pim_rpf_hash_key (void *arg)
 158 {
 159   struct pim_nexthop_cache *r = (struct pim_nexthop_cache *) arg;
 160
 161   return jhash_1word (r->rpf.rpf_addr.u.prefix4.s_addr, 0);
 162 }
 163
 164 /* Compare pim->rpf_hash node data */
 165 static int
 166 pim_rpf_equal (const void *arg1, const void *arg2)
 167 {
 168   const struct pim_nexthop_cache *r1 =
 169     (const struct pim_nexthop_cache *) arg1;
 170   const struct pim_nexthop_cache *r2 =
 171     (const struct pim_nexthop_cache *) arg2;
 172
 173   return prefix_same (&r1->rpf.rpf_addr, &r2->rpf.rpf_addr);
 174 }
 175
 176 /* Cleanup pim->rpf_hash each node data */
 177 static void
 178 pim_rp_list_hash_clean (void *data)
 179 {
 180   struct pim_nexthop_cache *pnc;
 181
 182   pnc = (struct pim_nexthop_cache *) data;
 183   if (pnc->rp_list->count)
 184     list_delete_all_node (pnc->rp_list);
 185   if (pnc->upstream_list->count)
 186     list_delete_all_node (pnc->upstream_list);
 187 }
 188
 189 void
 190 pim_prefix_list_update (struct prefix_list *plist)
 191 {
 192     pim_rp_prefix_list_update (plist);
 193     pim_ssm_prefix_list_update (plist);
 194     pim_upstream_spt_prefix_list_update (plist);
 195 }
 196
 197 static void
 198 pim_instance_terminate (void)
 199 {
 200   /* Traverse and cleanup rpf_hash */
 201   if (pimg->rpf_hash)
 202     {
 203       hash_clean (pimg->rpf_hash, (void *) pim_rp_list_hash_clean);
 204       hash_free (pimg->rpf_hash);
 205       pimg->rpf_hash = NULL;
 206     }
 207
 208   if (pimg->ssm_info)
 209     {
 210       pim_ssm_terminate (pimg->ssm_info);
 211       pimg->ssm_info = NULL;
 212     }
 213
 214   XFREE (MTYPE_PIM_PIM_INSTANCE, pimg);
 215 }
 216
 217 static void pim_free()
 218 {
 219   pim_ssmpingd_destroy();
 220
 221   pim_oil_terminate ();
 222
 223   pim_upstream_terminate ();
 224
 225   if (qpim_static_route_list)
 226      list_free(qpim_static_route_list);
 227
 228   pim_if_terminate ();
 229   pim_rp_free ();
 230
 231   pim_route_map_terminate();
 232
 233   zclient_lookup_free ();
 234
 235   zprivs_terminate(&pimd_privs);
 236 }
 237
 238 static struct pim_instance *
 239 pim_instance_init (vrf_id_t vrf_id, afi_t afi)
 240 {
 241   struct pim_instance *pim;
 242
 243   pim = XCALLOC (MTYPE_PIM_PIM_INSTANCE, sizeof (struct pim_instance));
 244   if (!pim)
 245     return NULL;
 246
 247   pim->vrf_id = vrf_id;
 248   pim->afi = afi;
 249
 250   pim->spt.switchover = PIM_SPT_IMMEDIATE;
 251   pim->spt.plist = NULL;
 252
 253   pim->rpf_hash = hash_create_size (256, pim_rpf_hash_key, pim_rpf_equal, NULL);
 254
 255   if (PIM_DEBUG_ZEBRA)
 256     zlog_debug ("%s: NHT rpf hash init ", __PRETTY_FUNCTION__);
 257
 258   pim->ssm_info = pim_ssm_init (vrf_id);
 259   if (!pim->ssm_info) {
 260     pim_instance_terminate ();
 261     return NULL;
 262   }
 263
 264   return pim;
 265 }
 266
 267 void pim_init()
 268 {
 269   qpim_rp_keep_alive_time = PIM_RP_KEEPALIVE_PERIOD;
 270
 271   pim_rp_init ();
 272
 273   if (!inet_aton(PIM_ALL_PIM_ROUTERS, &qpim_all_pim_routers_addr)) {
 274     zlog_err("%s %s: could not solve %s to group address: errno=%d: %s",
 275              __FILE__, __PRETTY_FUNCTION__,
 276              PIM_ALL_PIM_ROUTERS, errno, safe_strerror(errno));
 277     zassert(0);
 278     return;
 279   }
 280
 281   pim_oil_init ();
 282
 283   pim_upstream_init ();
 284
 285   qpim_static_route_list = list_new();
 286   if (!qpim_static_route_list) {
 287     zlog_err("%s %s: failure: static_route_list=list_new()",
 288         __FILE__, __PRETTY_FUNCTION__);
 289     return;
 290   }
 291   qpim_static_route_list->del = (void (*)(void *)) pim_static_route_free;
 292
 293   pim_mroute_socket_enable();
 294
 295
 296   /*
 297     RFC 4601: 4.6.3.  Assert Metrics
 298
 299     assert_metric
 300     infinite_assert_metric() {
 301     return {1,infinity,infinity,0}
 302     }
 303   */
 304   qpim_infinite_assert_metric.rpt_bit_flag      = 1;
 305   qpim_infinite_assert_metric.metric_preference = PIM_ASSERT_METRIC_PREFERENCE_MAX;
 306   qpim_infinite_assert_metric.route_metric      = PIM_ASSERT_ROUTE_METRIC_MAX;
 307   qpim_infinite_assert_metric.ip_address.s_addr = INADDR_ANY;
 308
 309   pim_if_init();
 310   pim_cmd_init();
 311   pim_ssmpingd_init();
 312 }
 313
 314 void pim_terminate()
 315 {
 316   struct zclient *zclient;
 317
 318   pim_free();
 319
 320   /* reverse prefix_list_init */
 321   prefix_list_add_hook (NULL);
 322   prefix_list_delete_hook (NULL);
 323   prefix_list_reset ();
 324
 325   pim_vrf_terminate ();
 326
 327   zclient = pim_zebra_zclient_get ();
 328   if (zclient)
 329     {
 330       zclient_stop (zclient);
 331       zclient_free (zclient);
 332     }
 333 }