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 along
16 * with this program; see the file COPYING; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 #include <netinet/in.h>
30 The following sizes are likely to support
31 any message sent within local MTU.
33 #define PIM_IGMP_BUFSIZE_READ (20000)
34 #define PIM_IGMP_BUFSIZE_WRITE (20000)
36 #define PIM_IGMP_MEMBERSHIP_QUERY (0x11)
37 #define PIM_IGMP_V1_MEMBERSHIP_REPORT (0x12)
38 #define PIM_IGMP_V2_MEMBERSHIP_REPORT (0x16)
39 #define PIM_IGMP_V2_LEAVE_GROUP (0x17)
40 #define PIM_IGMP_MTRACE_RESPONSE (0x1E)
41 #define PIM_IGMP_MTRACE_QUERY_REQUEST (0x1F)
42 #define PIM_IGMP_V3_MEMBERSHIP_REPORT (0x22)
44 #define IGMP_V3_REPORT_HEADER_SIZE (8)
45 #define IGMP_V3_GROUP_RECORD_MIN_SIZE (8)
46 #define IGMP_V3_MSG_MIN_SIZE \
47 (IGMP_V3_REPORT_HEADER_SIZE + IGMP_V3_GROUP_RECORD_MIN_SIZE)
48 #define IGMP_V12_MSG_SIZE (8)
50 #define IGMP_V3_GROUP_RECORD_TYPE_OFFSET (0)
51 #define IGMP_V3_GROUP_RECORD_AUXDATALEN_OFFSET (1)
52 #define IGMP_V3_GROUP_RECORD_NUMSOURCES_OFFSET (2)
53 #define IGMP_V3_GROUP_RECORD_GROUP_OFFSET (4)
54 #define IGMP_V3_GROUP_RECORD_SOURCE_OFFSET (8)
55 #define IGMP_CHECKSUM_OFFSET (2)
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)
69 #define IGMP_DEFAULT_VERSION (3)
72 struct in_addr group_addr
;
73 struct in_addr source_addr
;
80 struct interface
*interface
;
81 struct in_addr ifaddr
;
84 struct thread
*t_igmp_read
; /* read: IGMP sockets */
86 *t_igmp_query_timer
; /* timer: issue IGMP general queries */
87 struct thread
*t_other_querier_timer
; /* timer: other querier present */
89 int querier_query_interval
; /* QQI */
90 int querier_robustness_variable
; /* QRV */
91 int startup_query_count
;
95 struct list
*igmp_group_list
; /* list of struct igmp_group */
96 struct hash
*igmp_group_hash
;
99 struct igmp_sock
*pim_igmp_sock_lookup_ifaddr(struct list
*igmp_sock_list
,
100 struct in_addr ifaddr
);
101 struct igmp_sock
*igmp_sock_lookup_by_fd(struct list
*igmp_sock_list
, int fd
);
102 struct igmp_sock
*pim_igmp_sock_add(struct list
*igmp_sock_list
,
103 struct in_addr ifaddr
,
104 struct interface
*ifp
,
106 void igmp_sock_delete(struct igmp_sock
*igmp
);
107 void igmp_sock_free(struct igmp_sock
*igmp
);
108 void igmp_sock_delete_all(struct interface
*ifp
);
109 int pim_igmp_packet(struct igmp_sock
*igmp
, char *buf
, size_t len
);
111 void pim_igmp_general_query_on(struct igmp_sock
*igmp
);
112 void pim_igmp_general_query_off(struct igmp_sock
*igmp
);
113 void pim_igmp_other_querier_timer_on(struct igmp_sock
*igmp
);
114 void pim_igmp_other_querier_timer_off(struct igmp_sock
*igmp
);
116 #define IGMP_SOURCE_MASK_FORWARDING (1 << 0)
117 #define IGMP_SOURCE_MASK_DELETE (1 << 1)
118 #define IGMP_SOURCE_MASK_SEND (1 << 2)
119 #define IGMP_SOURCE_TEST_FORWARDING(flags) ((flags) & IGMP_SOURCE_MASK_FORWARDING)
120 #define IGMP_SOURCE_TEST_DELETE(flags) ((flags) & IGMP_SOURCE_MASK_DELETE)
121 #define IGMP_SOURCE_TEST_SEND(flags) ((flags) & IGMP_SOURCE_MASK_SEND)
122 #define IGMP_SOURCE_DO_FORWARDING(flags) ((flags) |= IGMP_SOURCE_MASK_FORWARDING)
123 #define IGMP_SOURCE_DO_DELETE(flags) ((flags) |= IGMP_SOURCE_MASK_DELETE)
124 #define IGMP_SOURCE_DO_SEND(flags) ((flags) |= IGMP_SOURCE_MASK_SEND)
125 #define IGMP_SOURCE_DONT_FORWARDING(flags) ((flags) &= ~IGMP_SOURCE_MASK_FORWARDING)
126 #define IGMP_SOURCE_DONT_DELETE(flags) ((flags) &= ~IGMP_SOURCE_MASK_DELETE)
127 #define IGMP_SOURCE_DONT_SEND(flags) ((flags) &= ~IGMP_SOURCE_MASK_SEND)
130 struct in_addr source_addr
;
131 struct thread
*t_source_timer
;
132 struct igmp_group
*source_group
; /* back pointer */
133 time_t source_creation
;
134 uint32_t source_flags
;
135 struct channel_oil
*source_channel_oil
;
138 RFC 3376: 6.6.3.2. Building and Sending Group and Source Specific
141 int source_query_retransmit_count
;
146 RFC 3376: 6.2.2. Definition of Group Timers
148 The group timer is only used when a group is in EXCLUDE mode and it
149 represents the time for the *filter-mode* of the group to expire and
150 switch to INCLUDE mode.
152 struct thread
*t_group_timer
;
154 /* Shared between group-specific and
155 group-and-source-specific retransmissions */
156 struct thread
*t_group_query_retransmit_timer
;
158 /* Counter exclusive for group-specific retransmissions
159 (not used by group-and-source-specific retransmissions,
160 since sources have their counters) */
161 int group_specific_query_retransmit_count
;
163 /* compatibility mode - igmp v1, v2 or v3 */
166 struct in_addr group_addr
;
167 int group_filtermode_isexcl
; /* 0=INCLUDE, 1=EXCLUDE */
168 struct list
*group_source_list
; /* list of struct igmp_source */
169 time_t group_creation
;
170 struct igmp_sock
*group_igmp_sock
; /* back pointer */
171 int64_t last_igmp_v1_report_dsec
;
172 int64_t last_igmp_v2_report_dsec
;
175 struct igmp_group
*find_group_by_addr(struct igmp_sock
*igmp
,
176 struct in_addr group_addr
);
177 struct igmp_group
*igmp_add_group_by_addr(struct igmp_sock
*igmp
,
178 struct in_addr group_addr
);
180 void igmp_group_delete_empty_include(struct igmp_group
*group
);
182 void igmp_startup_mode_on(struct igmp_sock
*igmp
);
184 void igmp_group_timer_on(struct igmp_group
*group
, long interval_msec
,
187 struct igmp_source
*source_new(struct igmp_group
*group
,
188 struct in_addr src_addr
);
190 void igmp_send_query(int igmp_version
, struct igmp_group
*group
, int fd
,
191 const char *ifname
, char *query_buf
, int query_buf_size
,
192 int num_sources
, struct in_addr dst_addr
,
193 struct in_addr group_addr
,
194 int query_max_response_time_dsec
, uint8_t s_flag
,
195 uint8_t querier_robustness_variable
,
196 uint16_t querier_query_interval
);
197 #endif /* PIM_IGMP_H */