pimd/pim_upstream.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 #ifndef PIM_UPSTREAM_H
  22 #define PIM_UPSTREAM_H
  23
  24 #include <zebra.h>
  25 #include <prefix.h>
  26
  27 #include <pimd/pim_rpf.h>
  28
  29 #define PIM_UPSTREAM_FLAG_MASK_DR_JOIN_DESIRED         (1 << 0)
  30 #define PIM_UPSTREAM_FLAG_MASK_DR_JOIN_DESIRED_UPDATED (1 << 1)
  31 #define PIM_UPSTREAM_FLAG_MASK_FHR                     (1 << 2)
  32 #define PIM_UPSTREAM_FLAG_MASK_SRC_IGMP                (1 << 3)
  33 #define PIM_UPSTREAM_FLAG_MASK_SRC_PIM                 (1 << 4)
  34 #define PIM_UPSTREAM_FLAG_MASK_SRC_STREAM              (1 << 5)
  35 #define PIM_UPSTREAM_FLAG_MASK_SRC_MSDP                (1 << 6)
  36
  37 #define PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(flags) ((flags) & PIM_UPSTREAM_FLAG_MASK_DR_JOIN_DESIRED)
  38 #define PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED_UPDATED(flags) ((flags) & PIM_UPSTREAM_FLAG_MASK_DR_JOIN_DESIRED_UPDATED)
  39 #define PIM_UPSTREAM_FLAG_TEST_FHR(flags) ((flags) & PIM_UPSTREAM_FLAG_MASK_FHR)
  40 #define PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(flags) ((flags) & PIM_UPSTREAM_FLAG_MASK_SRC_IGMP)
  41 #define PIM_UPSTREAM_FLAG_TEST_SRC_PIM(flags) ((flags) & PIM_UPSTREAM_FLAG_MASK_SRC_PIM)
  42 #define PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(flags) ((flags) & PIM_UPSTREAM_FLAG_MASK_SRC_STREAM)
  43 #define PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(flags) ((flags) & PIM_UPSTREAM_FLAG_MASK_SRC_MSDP)
  44
  45 #define PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(flags) ((flags) |= PIM_UPSTREAM_FLAG_MASK_DR_JOIN_DESIRED)
  46 #define PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED_UPDATED(flags) ((flags) |= PIM_UPSTREAM_FLAG_MASK_DR_JOIN_DESIRED_UPDATED)
  47 #define PIM_UPSTREAM_FLAG_SET_FHR(flags) ((flags) |= PIM_UPSTREAM_FLAG_MASK_FHR)
  48 #define PIM_UPSTREAM_FLAG_SET_SRC_IGMP(flags) ((flags) |= PIM_UPSTREAM_FLAG_MASK_SRC_IGMP)
  49 #define PIM_UPSTREAM_FLAG_SET_SRC_PIM(flags) ((flags) |= PIM_UPSTREAM_FLAG_MASK_SRC_PIM)
  50 #define PIM_UPSTREAM_FLAG_SET_SRC_STREAM(flags) ((flags) |= PIM_UPSTREAM_FLAG_MASK_SRC_STREAM)
  51 #define PIM_UPSTREAM_FLAG_SET_SRC_MSDP(flags) ((flags) |= PIM_UPSTREAM_FLAG_MASK_SRC_MSDP)
  52
  53 #define PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(flags) ((flags) &= ~PIM_UPSTREAM_FLAG_MASK_DR_JOIN_DESIRED)
  54 #define PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED_UPDATED(flags) ((flags) &= ~PIM_UPSTREAM_FLAG_MASK_DR_JOIN_DESIRED_UPDATED)
  55 #define PIM_UPSTREAM_FLAG_UNSET_FHR(flags) ((flags) &= ~PIM_UPSTREAM_FLAG_MASK_FHR)
  56 #define PIM_UPSTREAM_FLAG_UNSET_SRC_IGMP(flags) ((flags) &= ~PIM_UPSTREAM_FLAG_MASK_SRC_IGMP)
  57 #define PIM_UPSTREAM_FLAG_UNSET_SRC_PIM(flags) ((flags) &= ~PIM_UPSTREAM_FLAG_MASK_SRC_PIM)
  58 #define PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM(flags) ((flags) &= ~PIM_UPSTREAM_FLAG_MASK_SRC_STREAM)
  59 #define PIM_UPSTREAM_FLAG_UNSET_SRC_MSDP(flags) ((flags) &= ~PIM_UPSTREAM_FLAG_MASK_SRC_MSDP)
  60
  61 enum pim_upstream_state {
  62   PIM_UPSTREAM_NOTJOINED,
  63   PIM_UPSTREAM_JOINED,
  64   PIM_UPSTREAM_JOIN_PENDING,
  65   PIM_UPSTREAM_PRUNE,
  66 };
  67
  68 enum pim_upstream_sptbit {
  69   PIM_UPSTREAM_SPTBIT_FALSE,
  70   PIM_UPSTREAM_SPTBIT_TRUE
  71 };
  72
  73 /*
  74   Upstream (S,G) channel in Joined state
  75
  76   (S,G) in the "Not Joined" state is not represented
  77
  78   See RFC 4601: 4.5.7.  Sending (S,G) Join/Prune Message
  79 */
  80 struct pim_upstream {
  81   struct pim_upstream      *parent;
  82   struct in_addr           upstream_addr;/* Who we are talking to */
  83   struct in_addr           upstream_register; /*Who we received a register from*/
  84   struct prefix_sg         sg;           /* (S,G) group key */
  85   char                     sg_str[PIM_SG_LEN];
  86   uint32_t                 flags;
  87   struct channel_oil      *channel_oil;
  88   struct list             *sources;
  89
  90   enum pim_upstream_state  join_state;
  91   enum pim_upstream_sptbit sptbit;
  92
  93   int                      ref_count;
  94
  95   struct pim_rpf           rpf;
  96
  97   struct thread           *t_join_timer;
  98
  99   /*
 100    * RST(S,G)
 101    */
 102   struct thread           *t_rs_timer;
 103 #define PIM_REGISTER_SUPPRESSION_PERIOD (60)
 104 #define PIM_REGISTER_PROBE_PERIOD       (15)
 105
 106   /*
 107    * KAT(S,G)
 108    */
 109   struct thread           *t_ka_timer;
 110 #define PIM_KEEPALIVE_PERIOD  (210)
 111 #define PIM_RP_KEEPALIVE_PERIOD ( 3 * qpim_register_suppress_time + qpim_register_probe_time )
 112
 113   /* on the RP we restart a timer to indicate if registers are being rxed for
 114    * SG. This is needed by MSDP to determine its local SA cache */
 115   struct thread           *t_msdp_reg_timer;
 116 #define PIM_MSDP_REG_RXED_PERIOD (3 * (1.5 * qpim_register_suppress_time))
 117
 118   int64_t                  state_transition; /* Record current state uptime */
 119 };
 120
 121 struct list *pim_upstream_list;
 122 struct hash *pim_upstream_hash;
 123
 124 void pim_upstream_free(struct pim_upstream *up);
 125 struct pim_upstream *pim_upstream_find (struct prefix_sg *sg);
 126 struct pim_upstream *pim_upstream_add (struct prefix_sg *sg,
 127                                        struct interface *ifp, int flags,
 128                                        const char *name);
 129 void pim_upstream_del(struct pim_upstream *up, const char *name);
 130
 131 int pim_upstream_evaluate_join_desired(struct pim_upstream *up);
 132 int pim_upstream_evaluate_join_desired_interface(struct pim_upstream *up,
 133                                                  struct pim_ifchannel *ch);
 134 void pim_upstream_update_join_desired(struct pim_upstream *up);
 135
 136 void pim_upstream_join_suppress(struct pim_upstream *up,
 137                                 struct in_addr rpf_addr,
 138                                 int holdtime);
 139
 140 void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label,
 141                                                     struct pim_upstream *up);
 142
 143 void pim_upstream_join_timer_restart(struct pim_upstream *up);
 144 void pim_upstream_rpf_genid_changed(struct in_addr neigh_addr);
 145 void pim_upstream_rpf_interface_changed(struct pim_upstream *up,
 146                                         struct interface *old_rpf_ifp);
 147
 148 void pim_upstream_update_could_assert(struct pim_upstream *up);
 149 void pim_upstream_update_my_assert_metric(struct pim_upstream *up);
 150
 151 void pim_upstream_keep_alive_timer_start (struct pim_upstream *up, uint32_t time);
 152
 153 int pim_upstream_switch_to_spt_desired (struct prefix_sg *sg);
 154 #define SwitchToSptDesired(sg) pim_upstream_switch_to_spt_desired (sg)
 155 int pim_upstream_is_sg_rpt (struct pim_upstream *up);
 156
 157 void pim_upstream_set_sptbit (struct pim_upstream *up, struct interface *incoming);
 158
 159 void pim_upstream_start_register_stop_timer (struct pim_upstream *up, int null_register);
 160
 161 void pim_upstream_send_join (struct pim_upstream *up);
 162
 163 void pim_upstream_switch (struct pim_upstream *up, enum pim_upstream_state new_state);
 164
 165 const char *pim_upstream_state2str (enum pim_upstream_state join_state);
 166
 167 int pim_upstream_inherited_olist_decide (struct pim_upstream *up);
 168 int pim_upstream_inherited_olist (struct pim_upstream *up);
 169 int pim_upstream_empty_inherited_olist (struct pim_upstream *up);
 170
 171 void pim_upstream_find_new_rpf (void);
 172 void pim_upstream_msdp_reg_timer_start(struct pim_upstream *up);
 173
 174 void pim_upstream_init (void);
 175 void pim_upstream_terminate (void);
 176 #endif /* PIM_UPSTREAM_H */