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
  16   along with this program; see the file COPYING; if not, write to the
  17   Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
  18   MA 02110-1301 USA
  19 */
  20
  21 #include <zebra.h>
  22
  23 #include "log.h"
  24 #include "memory.h"
  25 #include "if.h"
  26 #include "prefix.h"
  27 #include "vty.h"
  28 #include "plist.h"
  29 #include "hash.h"
  30 #include "jhash.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 in_addr            qpim_inaddr_any;
  65 struct list              *qpim_ssmpingd_list = NULL;
  66 struct in_addr            qpim_ssmpingd_group_addr;
  67 int64_t                   qpim_scan_oil_events = 0;
  68 int64_t                   qpim_scan_oil_last = 0;
  69 int64_t                   qpim_mroute_add_events = 0;
  70 int64_t                   qpim_mroute_add_last = 0;
  71 int64_t                   qpim_mroute_del_events = 0;
  72 int64_t                   qpim_mroute_del_last = 0;
  73 struct list              *qpim_static_route_list = NULL;
  74 unsigned int              qpim_keep_alive_time = PIM_KEEPALIVE_PERIOD;
  75 signed int                qpim_rp_keep_alive_time = 0;
  76 int64_t                   qpim_nexthop_lookups = 0;
  77 int                       qpim_packet_process = PIM_DEFAULT_PACKET_PROCESS;
  78 struct pim_instance          *pimg = NULL;
  79
  80 int32_t qpim_register_suppress_time = PIM_REGISTER_SUPPRESSION_TIME_DEFAULT;
  81 int32_t qpim_register_probe_time = PIM_REGISTER_PROBE_TIME_DEFAULT;
  82
  83 static struct pim_instance *pim_instance_init (vrf_id_t vrf_id, afi_t afi);
  84 static void pim_instance_terminate (void);
  85
  86 static int
  87 pim_vrf_new (struct vrf *vrf)
  88 {
  89   zlog_debug ("VRF Created: %s(%d)", vrf->name, vrf->vrf_id);
  90   return 0;
  91 }
  92
  93 static int
  94 pim_vrf_delete (struct vrf *vrf)
  95 {
  96   zlog_debug ("VRF Deletion: %s(%d)", vrf->name, vrf->vrf_id);
  97   return 0;
  98 }
  99
 100 static int
 101 pim_vrf_enable (struct vrf *vrf)
 102 {
 103
 104   if (!vrf) // unexpected
 105     return -1;
 106
 107   if (vrf->vrf_id == VRF_DEFAULT)
 108     {
 109       pimg = pim_instance_init (VRF_DEFAULT, AFI_IP);
 110       if (pimg == NULL)
 111         zlog_err ("%s %s: pim class init failure ", __FILE__,
 112               __PRETTY_FUNCTION__);
 113     }
 114   return 0;
 115 }
 116
 117 static int
 118 pim_vrf_disable (struct vrf *vrf)
 119 {
 120   if (vrf->vrf_id == VRF_DEFAULT)
 121     return 0;
 122
 123   if (vrf->vrf_id == VRF_DEFAULT)
 124     pim_instance_terminate ();
 125
 126   /* Note: This is a callback, the VRF will be deleted by the caller. */
 127   return 0;
 128 }
 129
 130 void
 131 pim_vrf_init (void)
 132 {
 133   vrf_add_hook (VRF_NEW_HOOK, pim_vrf_new);
 134   vrf_add_hook (VRF_ENABLE_HOOK, pim_vrf_enable);
 135   vrf_add_hook (VRF_DISABLE_HOOK, pim_vrf_disable);
 136   vrf_add_hook (VRF_DELETE_HOOK, pim_vrf_delete);
 137
 138   vrf_init ();
 139 }
 140
 141 static void
 142 pim_vrf_terminate (void)
 143 {
 144   vrf_add_hook (VRF_NEW_HOOK, NULL);
 145   vrf_add_hook (VRF_ENABLE_HOOK, NULL);
 146   vrf_add_hook (VRF_DISABLE_HOOK, NULL);
 147   vrf_add_hook (VRF_DELETE_HOOK, NULL);
 148
 149   vrf_terminate ();
 150 }
 151
 152 /* Key generate for pim->rpf_hash */
 153 static unsigned int
 154 pim_rpf_hash_key (void *arg)
 155 {
 156   struct pim_nexthop_cache *r = (struct pim_nexthop_cache *) arg;
 157
 158   return jhash_1word (r->rpf.rpf_addr.u.prefix4.s_addr, 0);
 159 }
 160
 161 /* Compare pim->rpf_hash node data */
 162 static int
 163 pim_rpf_equal (const void *arg1, const void *arg2)
 164 {
 165   const struct pim_nexthop_cache *r1 =
 166     (const struct pim_nexthop_cache *) arg1;
 167   const struct pim_nexthop_cache *r2 =
 168     (const struct pim_nexthop_cache *) arg2;
 169
 170   return prefix_same (&r1->rpf.rpf_addr, &r2->rpf.rpf_addr);
 171 }
 172
 173 /* Cleanup pim->rpf_hash each node data */
 174 static void
 175 pim_rp_list_hash_clean (void *data)
 176 {
 177   struct pim_nexthop_cache *pnc;
 178
 179   pnc = (struct pim_nexthop_cache *) data;
 180   if (pnc->rp_list->count)
 181     list_delete_all_node (pnc->rp_list);
 182   if (pnc->upstream_list->count)
 183     list_delete_all_node (pnc->upstream_list);
 184 }
 185
 186 void
 187 pim_prefix_list_update (struct prefix_list *plist)
 188 {
 189     pim_rp_prefix_list_update (plist);
 190     pim_ssm_prefix_list_update (plist);
 191 }
 192
 193 static void
 194 pim_instance_terminate (void)
 195 {
 196   /* Traverse and cleanup rpf_hash */
 197   if (pimg && pimg->rpf_hash)
 198     {
 199       hash_clean (pimg->rpf_hash, (void *) pim_rp_list_hash_clean);
 200       hash_free (pimg->rpf_hash);
 201     }
 202   pim_ssm_terminate (pimg->ssm_info);
 203
 204   XFREE (MTYPE_PIM_PIM_INSTANCE, pimg);
 205 }
 206
 207 static void pim_free()
 208 {
 209   pim_ssmpingd_destroy();
 210
 211   pim_oil_terminate ();
 212
 213   pim_upstream_terminate ();
 214
 215   if (qpim_static_route_list)
 216      list_free(qpim_static_route_list);
 217
 218   pim_if_terminate ();
 219   pim_rp_free ();
 220
 221   pim_route_map_terminate();
 222
 223   zclient_lookup_free ();
 224
 225   zprivs_terminate(&pimd_privs);
 226 }
 227
 228 static struct pim_instance *
 229 pim_instance_init (vrf_id_t vrf_id, afi_t afi)
 230 {
 231   struct pim_instance *pim;
 232
 233   pim = XCALLOC (MTYPE_PIM_PIM_INSTANCE, sizeof (struct pim_instance));
 234   if (!pim)
 235     return NULL;
 236
 237   pim->vrf_id = vrf_id;
 238   pim->afi = afi;
 239
 240   pim->rpf_hash = hash_create_size (256, pim_rpf_hash_key, pim_rpf_equal);
 241
 242   if (PIM_DEBUG_ZEBRA)
 243     zlog_debug ("%s: NHT rpf hash init ", __PRETTY_FUNCTION__);
 244
 245   pim->ssm_info = pim_ssm_init (vrf_id);
 246   if (!pim->ssm_info) {
 247     pim_instance_terminate ();
 248     return NULL;
 249   }
 250
 251   return pim;
 252 }
 253
 254 void pim_init()
 255 {
 256   qpim_rp_keep_alive_time = PIM_RP_KEEPALIVE_PERIOD;
 257
 258   pim_rp_init ();
 259
 260   if (!inet_aton(PIM_ALL_PIM_ROUTERS, &qpim_all_pim_routers_addr)) {
 261     zlog_err("%s %s: could not solve %s to group address: errno=%d: %s",
 262              __FILE__, __PRETTY_FUNCTION__,
 263              PIM_ALL_PIM_ROUTERS, errno, safe_strerror(errno));
 264     zassert(0);
 265     return;
 266   }
 267
 268   pim_oil_init ();
 269
 270   pim_upstream_init ();
 271
 272   qpim_static_route_list = list_new();
 273   if (!qpim_static_route_list) {
 274     zlog_err("%s %s: failure: static_route_list=list_new()",
 275         __FILE__, __PRETTY_FUNCTION__);
 276     return;
 277   }
 278   qpim_static_route_list->del = (void (*)(void *)) pim_static_route_free;
 279
 280   pim_mroute_socket_enable();
 281
 282   qpim_inaddr_any.s_addr = PIM_NET_INADDR_ANY;
 283
 284   /*
 285     RFC 4601: 4.6.3.  Assert Metrics
 286
 287     assert_metric
 288     infinite_assert_metric() {
 289     return {1,infinity,infinity,0}
 290     }
 291   */
 292   qpim_infinite_assert_metric.rpt_bit_flag      = 1;
 293   qpim_infinite_assert_metric.metric_preference = PIM_ASSERT_METRIC_PREFERENCE_MAX;
 294   qpim_infinite_assert_metric.route_metric      = PIM_ASSERT_ROUTE_METRIC_MAX;
 295   qpim_infinite_assert_metric.ip_address        = qpim_inaddr_any;
 296
 297   pim_if_init();
 298   pim_cmd_init();
 299   pim_ssmpingd_init();
 300 }
 301
 302 void pim_terminate()
 303 {
 304   pim_free();
 305
 306   /* reverse prefix_list_init */
 307   prefix_list_add_hook (NULL);
 308   prefix_list_delete_hook (NULL);
 309   prefix_list_reset ();
 310
 311   pim_vrf_terminate ();
 312 }