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12e41d03 DL |
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 | |
12e41d03 DL |
19 | */ |
20 | ||
21 | #ifndef PIM_IFCHANNEL_H | |
22 | #define PIM_IFCHANNEL_H | |
23 | ||
24 | #include <zebra.h> | |
25 | ||
26 | #include "if.h" | |
27 | ||
28 | #include "pim_upstream.h" | |
29 | ||
30 | enum pim_ifmembership { | |
31 | PIM_IFMEMBERSHIP_NOINFO, | |
32 | PIM_IFMEMBERSHIP_INCLUDE | |
33 | }; | |
34 | ||
35 | enum pim_ifjoin_state { | |
36 | PIM_IFJOIN_NOINFO, | |
37 | PIM_IFJOIN_JOIN, | |
38 | PIM_IFJOIN_PRUNE_PENDING | |
39 | }; | |
40 | ||
41 | enum pim_ifassert_state { | |
42 | PIM_IFASSERT_NOINFO, | |
43 | PIM_IFASSERT_I_AM_WINNER, | |
44 | PIM_IFASSERT_I_AM_LOSER | |
45 | }; | |
46 | ||
47 | struct pim_assert_metric { | |
48 | uint32_t rpt_bit_flag; | |
49 | uint32_t metric_preference; | |
50 | uint32_t route_metric; | |
51 | struct in_addr ip_address; /* neighbor router that sourced the Assert message */ | |
52 | }; | |
53 | ||
54 | /* | |
55 | Flag to detect change in CouldAssert(S,G,I) | |
56 | */ | |
57 | #define PIM_IF_FLAG_MASK_COULD_ASSERT (1 << 0) | |
58 | #define PIM_IF_FLAG_TEST_COULD_ASSERT(flags) ((flags) & PIM_IF_FLAG_MASK_COULD_ASSERT) | |
59 | #define PIM_IF_FLAG_SET_COULD_ASSERT(flags) ((flags) |= PIM_IF_FLAG_MASK_COULD_ASSERT) | |
60 | #define PIM_IF_FLAG_UNSET_COULD_ASSERT(flags) ((flags) &= ~PIM_IF_FLAG_MASK_COULD_ASSERT) | |
61 | /* | |
62 | Flag to detect change in AssertTrackingDesired(S,G,I) | |
63 | */ | |
64 | #define PIM_IF_FLAG_MASK_ASSERT_TRACKING_DESIRED (1 << 1) | |
65 | #define PIM_IF_FLAG_TEST_ASSERT_TRACKING_DESIRED(flags) ((flags) & PIM_IF_FLAG_MASK_ASSERT_TRACKING_DESIRED) | |
66 | #define PIM_IF_FLAG_SET_ASSERT_TRACKING_DESIRED(flags) ((flags) |= PIM_IF_FLAG_MASK_ASSERT_TRACKING_DESIRED) | |
67 | #define PIM_IF_FLAG_UNSET_ASSERT_TRACKING_DESIRED(flags) ((flags) &= ~PIM_IF_FLAG_MASK_ASSERT_TRACKING_DESIRED) | |
68 | ||
69 | /* | |
70 | Per-interface (S,G) state | |
71 | */ | |
72 | struct pim_ifchannel { | |
73 | struct in_addr source_addr; /* (S,G) source key */ | |
74 | struct in_addr group_addr; /* (S,G) group key */ | |
75 | struct interface *interface; /* backpointer to interface */ | |
76 | uint32_t flags; | |
77 | ||
78 | /* IGMPv3 determined interface has local members for (S,G) ? */ | |
79 | enum pim_ifmembership local_ifmembership; | |
80 | ||
81 | /* Per-interface (S,G) Join/Prune State (Section 4.1.4 of RFC4601) */ | |
82 | enum pim_ifjoin_state ifjoin_state; | |
83 | struct thread *t_ifjoin_expiry_timer; | |
84 | struct thread *t_ifjoin_prune_pending_timer; | |
85 | int64_t ifjoin_creation; /* Record uptime of ifjoin state */ | |
86 | ||
87 | /* Per-interface (S,G) Assert State (Section 4.6.1 of RFC4601) */ | |
88 | enum pim_ifassert_state ifassert_state; | |
89 | struct thread *t_ifassert_timer; | |
90 | struct in_addr ifassert_winner; | |
91 | struct pim_assert_metric ifassert_winner_metric; | |
92 | int64_t ifassert_creation; /* Record uptime of ifassert state */ | |
93 | struct pim_assert_metric ifassert_my_metric; | |
94 | ||
95 | /* Upstream (S,G) state */ | |
96 | struct pim_upstream *upstream; | |
97 | }; | |
98 | ||
99 | void pim_ifchannel_free(struct pim_ifchannel *ch); | |
100 | void pim_ifchannel_delete(struct pim_ifchannel *ch); | |
101 | void pim_ifchannel_membership_clear(struct interface *ifp); | |
102 | void pim_ifchannel_delete_on_noinfo(struct interface *ifp); | |
103 | struct pim_ifchannel *pim_ifchannel_find(struct interface *ifp, | |
104 | struct in_addr source_addr, | |
105 | struct in_addr group_addr); | |
106 | struct pim_ifchannel *pim_ifchannel_add(struct interface *ifp, | |
107 | struct in_addr source_addr, | |
108 | struct in_addr group_addr); | |
109 | void pim_ifchannel_join_add(struct interface *ifp, | |
110 | struct in_addr neigh_addr, | |
111 | struct in_addr upstream, | |
112 | struct in_addr source_addr, | |
113 | struct in_addr group_addr, | |
114 | uint8_t source_flags, | |
115 | uint16_t holdtime); | |
116 | void pim_ifchannel_prune(struct interface *ifp, | |
117 | struct in_addr upstream, | |
118 | struct in_addr source_addr, | |
119 | struct in_addr group_addr, | |
120 | uint8_t source_flags, | |
121 | uint16_t holdtime); | |
122 | void pim_ifchannel_local_membership_add(struct interface *ifp, | |
123 | struct in_addr source_addr, | |
124 | struct in_addr group_addr); | |
125 | void pim_ifchannel_local_membership_del(struct interface *ifp, | |
126 | struct in_addr source_addr, | |
127 | struct in_addr group_addr); | |
128 | ||
129 | void pim_ifchannel_ifjoin_switch(const char *caller, | |
130 | struct pim_ifchannel *ch, | |
131 | enum pim_ifjoin_state new_state); | |
132 | const char *pim_ifchannel_ifjoin_name(enum pim_ifjoin_state ifjoin_state); | |
133 | const char *pim_ifchannel_ifassert_name(enum pim_ifassert_state ifassert_state); | |
134 | ||
135 | int pim_ifchannel_isin_oiflist(struct pim_ifchannel *ch); | |
136 | ||
137 | void reset_ifassert_state(struct pim_ifchannel *ch); | |
138 | ||
139 | void pim_ifchannel_update_could_assert(struct pim_ifchannel *ch); | |
140 | void pim_ifchannel_update_my_assert_metric(struct pim_ifchannel *ch); | |
141 | void pim_ifchannel_update_assert_tracking_desired(struct pim_ifchannel *ch); | |
142 | ||
143 | #endif /* PIM_IFCHANNEL_H */ |