1 | /*
|
---|
2 | * Copyright (c) 2002 CITEL Technologies Ltd.
|
---|
3 | * All rights reserved.
|
---|
4 | *
|
---|
5 | * Redistribution and use in source and binary forms, with or without
|
---|
6 | * modification, are permitted provided that the following conditions
|
---|
7 | * are met:
|
---|
8 | * 1. Redistributions of source code must retain the above copyright
|
---|
9 | * notice, this list of conditions and the following disclaimer.
|
---|
10 | * 2. Redistributions in binary form must reproduce the above copyright
|
---|
11 | * notice, this list of conditions and the following disclaimer in the
|
---|
12 | * documentation and/or other materials provided with the distribution.
|
---|
13 | * 3. Neither the name of CITEL Technologies Ltd nor the names of its contributors
|
---|
14 | * may be used to endorse or promote products derived from this software
|
---|
15 | * without specific prior written permission.
|
---|
16 | *
|
---|
17 | * THIS SOFTWARE IS PROVIDED BY CITEL TECHNOLOGIES AND CONTRIBUTORS ``AS IS''
|
---|
18 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
---|
19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
---|
20 | * ARE DISCLAIMED. IN NO EVENT SHALL CITEL TECHNOLOGIES OR CONTRIBUTORS BE LIABLE
|
---|
21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
---|
22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
---|
23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
---|
24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
---|
25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
---|
26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
---|
27 | * SUCH DAMAGE.
|
---|
28 | *
|
---|
29 | * This file is a contribution to the lwIP TCP/IP stack.
|
---|
30 | * The Swedish Institute of Computer Science and Adam Dunkels
|
---|
31 | * are specifically granted permission to redistribute this
|
---|
32 | * source code.
|
---|
33 | */
|
---|
34 |
|
---|
35 | #ifndef __LWIP_IGMP_H__
|
---|
36 | #define __LWIP_IGMP_H__
|
---|
37 |
|
---|
38 | #include "lwip/opt.h"
|
---|
39 | #include "lwip/ip_addr.h"
|
---|
40 | #include "lwip/netif.h"
|
---|
41 | #include "lwip/pbuf.h"
|
---|
42 |
|
---|
43 | #if LWIP_IGMP /* don't build if not configured for use in lwipopts.h */
|
---|
44 |
|
---|
45 | #ifdef __cplusplus
|
---|
46 | extern "C" {
|
---|
47 | #endif
|
---|
48 |
|
---|
49 |
|
---|
50 | /* IGMP timer */
|
---|
51 | #define IGMP_TMR_INTERVAL 100 /* Milliseconds */
|
---|
52 | #define IGMP_V1_DELAYING_MEMBER_TMR (1000/IGMP_TMR_INTERVAL)
|
---|
53 | #define IGMP_JOIN_DELAYING_MEMBER_TMR (500 /IGMP_TMR_INTERVAL)
|
---|
54 |
|
---|
55 | /* MAC Filter Actions, these are passed to a netif's
|
---|
56 | * igmp_mac_filter callback function. */
|
---|
57 | #define IGMP_DEL_MAC_FILTER 0
|
---|
58 | #define IGMP_ADD_MAC_FILTER 1
|
---|
59 |
|
---|
60 |
|
---|
61 | /**
|
---|
62 | * igmp group structure - there is
|
---|
63 | * a list of groups for each interface
|
---|
64 | * these should really be linked from the interface, but
|
---|
65 | * if we keep them separate we will not affect the lwip original code
|
---|
66 | * too much
|
---|
67 | *
|
---|
68 | * There will be a group for the all systems group address but this
|
---|
69 | * will not run the state machine as it is used to kick off reports
|
---|
70 | * from all the other groups
|
---|
71 | */
|
---|
72 | struct igmp_group {
|
---|
73 | /** next link */
|
---|
74 | struct igmp_group *next;
|
---|
75 | /** interface on which the group is active */
|
---|
76 | struct netif *netif;
|
---|
77 | /** multicast address */
|
---|
78 | ip_addr_t group_address;
|
---|
79 | /** signifies we were the last person to report */
|
---|
80 | u8_t last_reporter_flag;
|
---|
81 | /** current state of the group */
|
---|
82 | u8_t group_state;
|
---|
83 | /** timer for reporting, negative is OFF */
|
---|
84 | u16_t timer;
|
---|
85 | /** counter of simultaneous uses */
|
---|
86 | u8_t use;
|
---|
87 | };
|
---|
88 |
|
---|
89 | /* Prototypes */
|
---|
90 | void igmp_init(void);
|
---|
91 | err_t igmp_start(struct netif *netif);
|
---|
92 | err_t igmp_stop(struct netif *netif);
|
---|
93 | void igmp_report_groups(struct netif *netif);
|
---|
94 | struct igmp_group *igmp_lookfor_group(struct netif *ifp, ip_addr_t *addr);
|
---|
95 | void igmp_input(struct pbuf *p, struct netif *inp, ip_addr_t *dest);
|
---|
96 | err_t igmp_joingroup(ip_addr_t *ifaddr, ip_addr_t *groupaddr);
|
---|
97 | err_t igmp_leavegroup(ip_addr_t *ifaddr, ip_addr_t *groupaddr);
|
---|
98 | void igmp_tmr(void);
|
---|
99 |
|
---|
100 | #ifdef __cplusplus
|
---|
101 | }
|
---|
102 | #endif
|
---|
103 |
|
---|
104 | #endif /* LWIP_IGMP */
|
---|
105 |
|
---|
106 | #endif /* __LWIP_IGMP_H__ */
|
---|