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>
25 #include "pim_jp_agg.h"
27 #define PIM_HDR_LEN sizeof(struct pim_msg_header)
30 ---------- ------------------
36 http://www.iana.org/assignments/address-family-numbers
38 enum pim_msg_address_family
{
39 PIM_MSG_ADDRESS_FAMILY_RESERVED
,
40 PIM_MSG_ADDRESS_FAMILY_IPV4
,
41 PIM_MSG_ADDRESS_FAMILY_IPV6
,
45 * Network Order pim_msg_hdr
46 * =========================
47 * PIM Header definition as per RFC 5059. N bit introduced to indicate
48 * do-not-forward option in PIM Boot strap Message.
50 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
51 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
52 * |PIM Ver| Type |N| Reserved | Checksum |
53 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
55 struct pim_msg_header
{
58 uint8_t Nbit
: 1; /* No Fwd Bit */
61 } __attribute__((packed
));
63 struct pim_encoded_ipv4_unicast
{
67 } __attribute__((packed
));
70 * Encoded Group format. RFC 4601 Sec 4.9.1
72 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
73 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
74 * | Addr Family | Encoding Type |B| Reserved |Z| Mask Len |
75 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
76 * | Group multicast Address
77 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...
79 struct pim_encoded_group_ipv4
{
82 uint8_t bidir
: 1; /* Bidir bit */
83 uint8_t reserved
: 6; /* Reserved */
84 uint8_t sz
: 1; /* scope zone bit */
87 } __attribute__((packed
));
91 * Encoded Source format. RFC 4601 Sec 4.9.1
93 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
94 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
95 * | Addr Family | Encoding Type | Rsrvd |S|W|R| Mask Len |
96 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
98 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...
100 struct pim_encoded_source_ipv4
{
106 } __attribute__((packed
));
108 struct pim_jp_groups
{
109 struct pim_encoded_group_ipv4 g
;
112 struct pim_encoded_source_ipv4 s
[1];
113 } __attribute__((packed
));
116 struct pim_msg_header header
;
117 struct pim_encoded_ipv4_unicast addr
;
121 struct pim_jp_groups groups
[1];
122 } __attribute__((packed
));
124 void pim_msg_build_header(uint8_t *pim_msg
, size_t pim_msg_size
,
125 uint8_t pim_msg_type
, bool no_fwd
);
126 uint8_t *pim_msg_addr_encode_ipv4_ucast(uint8_t *buf
, struct in_addr addr
);
127 uint8_t *pim_msg_addr_encode_ipv4_group(uint8_t *buf
, struct in_addr addr
);
129 #define PIM_ENCODE_SPARSE_BIT 0x04
130 #define PIM_ENCODE_WC_BIT 0x02
131 #define PIM_ENCODE_RPT_BIT 0x01
132 uint8_t *pim_msg_addr_encode_ipv4_source(uint8_t *buf
, struct in_addr addr
,
136 size_t pim_msg_get_jp_group_size(struct list
*sources
);
137 size_t pim_msg_build_jp_groups(struct pim_jp_groups
*grp
,
138 struct pim_jp_agg_group
*sgs
, size_t size
);
139 #endif /* PIM_MSG_H */