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acddc0ed | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
12e41d03 | 2 | /* |
896014f4 DL |
3 | * PIM for Quagga |
4 | * Copyright (C) 2008 Everton da Silva Marques | |
896014f4 | 5 | */ |
12e41d03 DL |
6 | |
7 | #ifndef PIM_IGMP_JOIN_H | |
8 | #define PIM_IGMP_JOIN_H | |
9 | ||
5ef104fc | 10 | /* required headers #include'd by caller */ |
12e41d03 | 11 | |
5ef104fc DL |
12 | #ifndef SOL_IP |
13 | #define SOL_IP IPPROTO_IP | |
14 | #endif | |
15 | ||
771ce8ad LM |
16 | #ifndef MCAST_JOIN_GROUP |
17 | #define MCAST_JOIN_GROUP 42 | |
18 | #endif | |
19 | ||
5ef104fc DL |
20 | #ifndef MCAST_JOIN_SOURCE_GROUP |
21 | #define MCAST_JOIN_SOURCE_GROUP 46 | |
d62a17ae | 22 | struct group_source_req { |
23 | uint32_t gsr_interface; | |
24 | struct sockaddr_storage gsr_group; | |
25 | struct sockaddr_storage gsr_source; | |
5ef104fc DL |
26 | }; |
27 | #endif | |
28 | ||
5a46a3de DL |
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) | |
5ef104fc | 32 | { |
d62a17ae | 33 | struct group_source_req req; |
34 | struct sockaddr_in group; | |
35 | struct sockaddr_in source; | |
5ef104fc | 36 | |
d62a17ae | 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)); | |
5ef104fc | 43 | |
d62a17ae | 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)); | |
5ef104fc | 49 | |
d62a17ae | 50 | req.gsr_interface = ifindex; |
5ef104fc | 51 | |
771ce8ad LM |
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)); | |
5ef104fc | 58 | } |
12e41d03 DL |
59 | |
60 | #endif /* PIM_IGMP_JOIN_H */ |