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1 | // SPDX-License-Identifier: GPL-2.0-or-later | |
2 | /* | |
3 | * PIM for Quagga | |
4 | * Copyright (C) 2008 Everton da Silva Marques | |
5 | */ | |
6 | ||
7 | #ifndef PIM_IGMP_JOIN_H | |
8 | #define PIM_IGMP_JOIN_H | |
9 | ||
10 | /* required headers #include'd by caller */ | |
11 | ||
12 | #ifndef SOL_IP | |
13 | #define SOL_IP IPPROTO_IP | |
14 | #endif | |
15 | ||
16 | #ifndef MCAST_JOIN_GROUP | |
17 | #define MCAST_JOIN_GROUP 42 | |
18 | #endif | |
19 | ||
20 | #ifndef MCAST_JOIN_SOURCE_GROUP | |
21 | #define MCAST_JOIN_SOURCE_GROUP 46 | |
22 | struct group_source_req { | |
23 | uint32_t gsr_interface; | |
24 | struct sockaddr_storage gsr_group; | |
25 | struct sockaddr_storage gsr_source; | |
26 | }; | |
27 | #endif | |
28 | ||
29 | static inline int pim_igmp_join_source(int fd, ifindex_t ifindex, | |
30 | struct in_addr group_addr, | |
31 | struct in_addr source_addr) | |
32 | { | |
33 | struct group_source_req req; | |
34 | struct sockaddr_in group; | |
35 | struct sockaddr_in source; | |
36 | ||
37 | memset(&req, 0, sizeof(req)); | |
38 | memset(&group, 0, sizeof(group)); | |
39 | group.sin_family = AF_INET; | |
40 | group.sin_addr = group_addr; | |
41 | group.sin_port = htons(0); | |
42 | memcpy(&req.gsr_group, &group, sizeof(struct sockaddr_in)); | |
43 | ||
44 | memset(&source, 0, sizeof(source)); | |
45 | source.sin_family = AF_INET; | |
46 | source.sin_addr = source_addr; | |
47 | source.sin_port = htons(0); | |
48 | memcpy(&req.gsr_source, &source, sizeof(struct sockaddr_in)); | |
49 | ||
50 | req.gsr_interface = ifindex; | |
51 | ||
52 | if (source_addr.s_addr == INADDR_ANY) | |
53 | return setsockopt(fd, SOL_IP, MCAST_JOIN_GROUP, &req, | |
54 | sizeof(req)); | |
55 | else | |
56 | return setsockopt(fd, SOL_IP, MCAST_JOIN_SOURCE_GROUP, &req, | |
57 | sizeof(req)); | |
58 | } | |
59 | ||
60 | #endif /* PIM_IGMP_JOIN_H */ |