3 Copyright (C) 2008 Everton da Silva Marques
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.
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.
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,
20 $QuaggaId: $Format:%an, %ai, %h$ $
26 #include <netinet/in.h>
33 The following sizes are likely to support
34 any message sent within local MTU.
36 #define PIM_IGMP_BUFSIZE_READ (20000)
37 #define PIM_IGMP_BUFSIZE_WRITE (20000)
39 #define PIM_IGMP_MEMBERSHIP_QUERY (0x11)
40 #define PIM_IGMP_V1_MEMBERSHIP_REPORT (0x12)
41 #define PIM_IGMP_V2_MEMBERSHIP_REPORT (0x16)
42 #define PIM_IGMP_V2_LEAVE_GROUP (0x17)
43 #define PIM_IGMP_V3_MEMBERSHIP_REPORT (0x22)
45 #define IGMP_V3_REPORT_HEADER_SIZE (8)
46 #define IGMP_V3_GROUP_RECORD_MIN_SIZE (8)
47 #define IGMP_V3_MSG_MIN_SIZE (IGMP_V3_REPORT_HEADER_SIZE + \
48 IGMP_V3_GROUP_RECORD_MIN_SIZE)
49 #define IGMP_V12_MSG_SIZE (8)
51 #define IGMP_V3_GROUP_RECORD_TYPE_OFFSET (0)
52 #define IGMP_V3_GROUP_RECORD_AUXDATALEN_OFFSET (1)
53 #define IGMP_V3_GROUP_RECORD_NUMSOURCES_OFFSET (2)
54 #define IGMP_V3_GROUP_RECORD_GROUP_OFFSET (4)
55 #define IGMP_V3_GROUP_RECORD_SOURCE_OFFSET (8)
57 /* RFC 3376: 8.1. Robustness Variable - Default: 2 */
58 #define IGMP_DEFAULT_ROBUSTNESS_VARIABLE (2)
60 /* RFC 3376: 8.2. Query Interval - Default: 125 seconds */
61 #define IGMP_GENERAL_QUERY_INTERVAL (125)
63 /* RFC 3376: 8.3. Query Response Interval - Default: 100 deciseconds */
64 #define IGMP_QUERY_MAX_RESPONSE_TIME_DSEC (100)
66 /* RFC 3376: 8.8. Last Member Query Interval - Default: 10 deciseconds */
67 #define IGMP_SPECIFIC_QUERY_MAX_RESPONSE_TIME_DSEC (10)
70 struct in_addr group_addr;
71 struct in_addr source_addr;
78 struct interface *interface;
79 struct in_addr ifaddr;
82 struct thread *t_igmp_read; /* read: IGMP sockets */
83 struct thread *t_igmp_query_timer; /* timer: issue IGMP general queries */
84 struct thread *t_other_querier_timer; /* timer: other querier present */
86 int querier_query_interval; /* QQI */
87 int querier_robustness_variable; /* QRV */
88 int startup_query_count;
90 struct list *igmp_group_list; /* list of struct igmp_group */
93 struct igmp_sock *pim_igmp_sock_lookup_ifaddr(struct list *igmp_sock_list,
94 struct in_addr ifaddr);
95 struct igmp_sock *igmp_sock_lookup_by_fd(struct list *igmp_sock_list,
97 struct igmp_sock *pim_igmp_sock_add(struct list *igmp_sock_list,
98 struct in_addr ifaddr,
99 struct interface *ifp);
100 void igmp_sock_delete(struct igmp_sock *igmp);
101 void igmp_sock_free(struct igmp_sock *igmp);
103 int pim_igmp_packet(struct igmp_sock *igmp, char *buf, size_t len);
105 void pim_igmp_general_query_on(struct igmp_sock *igmp);
106 void pim_igmp_general_query_off(struct igmp_sock *igmp);
107 void pim_igmp_other_querier_timer_on(struct igmp_sock *igmp);
108 void pim_igmp_other_querier_timer_off(struct igmp_sock *igmp);
110 #define IGMP_SOURCE_MASK_FORWARDING (1 << 0)
111 #define IGMP_SOURCE_MASK_DELETE (1 << 1)
112 #define IGMP_SOURCE_MASK_SEND (1 << 2)
113 #define IGMP_SOURCE_TEST_FORWARDING(flags) ((flags) & IGMP_SOURCE_MASK_FORWARDING)
114 #define IGMP_SOURCE_TEST_DELETE(flags) ((flags) & IGMP_SOURCE_MASK_DELETE)
115 #define IGMP_SOURCE_TEST_SEND(flags) ((flags) & IGMP_SOURCE_MASK_SEND)
116 #define IGMP_SOURCE_DO_FORWARDING(flags) ((flags) |= IGMP_SOURCE_MASK_FORWARDING)
117 #define IGMP_SOURCE_DO_DELETE(flags) ((flags) |= IGMP_SOURCE_MASK_DELETE)
118 #define IGMP_SOURCE_DO_SEND(flags) ((flags) |= IGMP_SOURCE_MASK_SEND)
119 #define IGMP_SOURCE_DONT_FORWARDING(flags) ((flags) &= ~IGMP_SOURCE_MASK_FORWARDING)
120 #define IGMP_SOURCE_DONT_DELETE(flags) ((flags) &= ~IGMP_SOURCE_MASK_DELETE)
121 #define IGMP_SOURCE_DONT_SEND(flags) ((flags) &= ~IGMP_SOURCE_MASK_SEND)
124 struct in_addr source_addr;
125 struct thread *t_source_timer;
126 struct igmp_group *source_group; /* back pointer */
127 time_t source_creation;
128 uint32_t source_flags;
129 struct channel_oil *source_channel_oil;
132 RFC 3376: 6.6.3.2. Building and Sending Group and Source Specific Queries
134 int source_query_retransmit_count;
139 RFC 3376: 6.2.2. Definition of Group Timers
141 The group timer is only used when a group is in EXCLUDE mode and it
142 represents the time for the *filter-mode* of the group to expire and
143 switch to INCLUDE mode.
145 struct thread *t_group_timer;
147 /* Shared between group-specific and
148 group-and-source-specific retransmissions */
149 struct thread *t_group_query_retransmit_timer;
151 /* Counter exclusive for group-specific retransmissions
152 (not used by group-and-source-specific retransmissions,
153 since sources have their counters) */
154 int group_specific_query_retransmit_count;
156 struct in_addr group_addr;
157 int group_filtermode_isexcl; /* 0=INCLUDE, 1=EXCLUDE */
158 struct list *group_source_list; /* list of struct igmp_source */
159 time_t group_creation;
160 struct igmp_sock *group_igmp_sock; /* back pointer */
161 int64_t last_igmp_v1_report_dsec;
162 int64_t last_igmp_v2_report_dsec;
165 struct igmp_group *igmp_add_group_by_addr(struct igmp_sock *igmp,
166 struct in_addr group_addr);
168 void igmp_group_delete_empty_include(struct igmp_group *group);
170 void igmp_startup_mode_on(struct igmp_sock *igmp);
172 void igmp_group_timer_on(struct igmp_group *group,
173 long interval_msec, const char *ifname);
176 source_new (struct igmp_group *group,
177 struct in_addr src_addr);
178 #endif /* PIM_IGMP_H */