pimd/pim_ifchannel.h

   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
  22 #ifndef PIM_IFCHANNEL_H
  23 #define PIM_IFCHANNEL_H
  24
  25 #include <zebra.h>
  26
  27 #include "if.h"
  28 #include "prefix.h"
  29
  30 #include "pim_upstream.h"
  31
  32 enum pim_ifmembership {
  33   PIM_IFMEMBERSHIP_NOINFO,
  34   PIM_IFMEMBERSHIP_INCLUDE
  35 };
  36
  37 enum pim_ifjoin_state {
  38   PIM_IFJOIN_NOINFO,
  39   PIM_IFJOIN_JOIN,
  40   PIM_IFJOIN_PRUNE_PENDING,
  41 };
  42
  43 enum pim_ifassert_state {
  44   PIM_IFASSERT_NOINFO,
  45   PIM_IFASSERT_I_AM_WINNER,
  46   PIM_IFASSERT_I_AM_LOSER
  47 };
  48
  49 struct pim_assert_metric {
  50   uint32_t       rpt_bit_flag;
  51   uint32_t       metric_preference;
  52   uint32_t       route_metric;
  53   struct in_addr ip_address; /* neighbor router that sourced the Assert message */
  54 };
  55
  56 /*
  57   Flag to detect change in CouldAssert(S,G,I)
  58 */
  59 #define PIM_IF_FLAG_MASK_COULD_ASSERT (1 << 0)
  60 #define PIM_IF_FLAG_TEST_COULD_ASSERT(flags) ((flags) & PIM_IF_FLAG_MASK_COULD_ASSERT)
  61 #define PIM_IF_FLAG_SET_COULD_ASSERT(flags) ((flags) |= PIM_IF_FLAG_MASK_COULD_ASSERT)
  62 #define PIM_IF_FLAG_UNSET_COULD_ASSERT(flags) ((flags) &= ~PIM_IF_FLAG_MASK_COULD_ASSERT)
  63 /*
  64   Flag to detect change in AssertTrackingDesired(S,G,I)
  65 */
  66 #define PIM_IF_FLAG_MASK_ASSERT_TRACKING_DESIRED (1 << 1)
  67 #define PIM_IF_FLAG_TEST_ASSERT_TRACKING_DESIRED(flags) ((flags) & PIM_IF_FLAG_MASK_ASSERT_TRACKING_DESIRED)
  68 #define PIM_IF_FLAG_SET_ASSERT_TRACKING_DESIRED(flags) ((flags) |= PIM_IF_FLAG_MASK_ASSERT_TRACKING_DESIRED)
  69 #define PIM_IF_FLAG_UNSET_ASSERT_TRACKING_DESIRED(flags) ((flags) &= ~PIM_IF_FLAG_MASK_ASSERT_TRACKING_DESIRED)
  70
  71 /*
  72   Per-interface (S,G) state
  73 */
  74 struct pim_ifchannel {
  75   struct pim_ifchannel     *parent;
  76   struct prefix_sg          sg;
  77   struct interface         *interface;   /* backpointer to interface */
  78   uint32_t                  flags;
  79
  80   /* IGMPv3 determined interface has local members for (S,G) ? */
  81   enum pim_ifmembership     local_ifmembership;
  82
  83   /* Per-interface (S,G) Join/Prune State (Section 4.1.4 of RFC4601) */
  84   enum pim_ifjoin_state     ifjoin_state;
  85   struct thread            *t_ifjoin_expiry_timer;
  86   struct thread            *t_ifjoin_prune_pending_timer;
  87   int64_t                   ifjoin_creation; /* Record uptime of ifjoin state */
  88
  89   /* Per-interface (S,G) Assert State (Section 4.6.1 of RFC4601) */
  90   enum pim_ifassert_state   ifassert_state;
  91   struct thread            *t_ifassert_timer;
  92   struct in_addr            ifassert_winner;
  93   struct pim_assert_metric  ifassert_winner_metric;
  94   int64_t                   ifassert_creation; /* Record uptime of ifassert state */
  95   struct pim_assert_metric  ifassert_my_metric;
  96
  97   /* Upstream (S,G) state */
  98   struct pim_upstream      *upstream;
  99 };
 100
 101 void pim_ifchannel_free(struct pim_ifchannel *ch);
 102 void pim_ifchannel_delete(struct pim_ifchannel *ch);
 103 void pim_ifchannel_membership_clear(struct interface *ifp);
 104 void pim_ifchannel_delete_on_noinfo(struct interface *ifp);
 105 struct pim_ifchannel *pim_ifchannel_find(struct interface *ifp,
 106                                          struct prefix_sg *sg);
 107 struct pim_ifchannel *pim_ifchannel_add(struct interface *ifp,
 108                                         struct prefix_sg *sg);
 109 void pim_ifchannel_join_add(struct interface *ifp,
 110                             struct in_addr neigh_addr,
 111                             struct in_addr upstream,
 112                             struct prefix_sg *sg,
 113                             uint8_t source_flags,
 114                             uint16_t holdtime);
 115 void pim_ifchannel_prune(struct interface *ifp,
 116                          struct in_addr upstream,
 117                          struct prefix_sg *sg,
 118                          uint8_t source_flags,
 119                          uint16_t holdtime);
 120 void pim_ifchannel_local_membership_add(struct interface *ifp,
 121                                         struct prefix_sg *sg);
 122 void pim_ifchannel_local_membership_del(struct interface *ifp,
 123                                         struct prefix_sg *sg);
 124
 125 void pim_ifchannel_ifjoin_switch(const char *caller,
 126                                  struct pim_ifchannel *ch,
 127                                  enum pim_ifjoin_state new_state);
 128 const char *pim_ifchannel_ifjoin_name(enum pim_ifjoin_state ifjoin_state);
 129 const char *pim_ifchannel_ifassert_name(enum pim_ifassert_state ifassert_state);
 130
 131 int pim_ifchannel_isin_oiflist(struct pim_ifchannel *ch);
 132
 133 void reset_ifassert_state(struct pim_ifchannel *ch);
 134
 135 void pim_ifchannel_update_could_assert(struct pim_ifchannel *ch);
 136 void pim_ifchannel_update_my_assert_metric(struct pim_ifchannel *ch);
 137 void pim_ifchannel_update_assert_tracking_desired(struct pim_ifchannel *ch);
 138
 139 void pim_ifchannel_scan_forward_start (struct interface *new_ifp);
 140 #endif /* PIM_IFCHANNEL_H */