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1 /*
2 PIM for Quagga
3 Copyright (C) 2008 Everton da Silva Marques
4
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.
9
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.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; see the file COPYING; if not, write to the
17 Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
18 MA 02110-1301 USA
19 */
20
21 #ifndef PIM_TLV_H
22 #define PIM_TLV_H
23
24 #include <zebra.h>
25
26 #include "config.h"
27 #include "if.h"
28 #include "linklist.h"
29
30 #define PIM_MSG_OPTION_TYPE_HOLDTIME (1)
31 #define PIM_MSG_OPTION_TYPE_LAN_PRUNE_DELAY (2)
32 #define PIM_MSG_OPTION_TYPE_DR_PRIORITY (19)
33 #define PIM_MSG_OPTION_TYPE_GENERATION_ID (20)
34 #define PIM_MSG_OPTION_TYPE_DM_STATE_REFRESH (21)
35 #define PIM_MSG_OPTION_TYPE_ADDRESS_LIST (24)
36
37 typedef uint32_t pim_hello_options;
38 #define PIM_OPTION_MASK_HOLDTIME (1 << 0) /* recv holdtime */
39 #define PIM_OPTION_MASK_LAN_PRUNE_DELAY (1 << 1) /* recv lan_prune_delay */
40 #define PIM_OPTION_MASK_DR_PRIORITY (1 << 2) /* recv dr_priority */
41 #define PIM_OPTION_MASK_GENERATION_ID (1 << 3) /* recv generation_id */
42 #define PIM_OPTION_MASK_ADDRESS_LIST (1 << 4) /* recv secondary address list */
43 #define PIM_OPTION_MASK_CAN_DISABLE_JOIN_SUPPRESSION (1 << 5) /* T bit value (valid if recv lan_prune_delay) */
44
45 #define PIM_RPT_BIT_MASK (1 << 0)
46 #define PIM_WILDCARD_BIT_MASK (1 << 1)
47
48 #define PIM_OPTION_SET(options, option_mask) ((options) |= (option_mask))
49 #define PIM_OPTION_UNSET(options, option_mask) ((options) &= ~(option_mask))
50 #define PIM_OPTION_IS_SET(options, option_mask) ((options) & (option_mask))
51
52 #define PIM_TLV_GET_UINT16(buf) ntohs(*(const uint16_t *)(buf))
53 #define PIM_TLV_GET_UINT32(buf) ntohl(*(const uint32_t *)(buf))
54 #define PIM_TLV_GET_TYPE(buf) PIM_TLV_GET_UINT16(buf)
55 #define PIM_TLV_GET_LENGTH(buf) PIM_TLV_GET_UINT16(buf)
56 #define PIM_TLV_GET_HOLDTIME(buf) PIM_TLV_GET_UINT16(buf)
57 #define PIM_TLV_GET_PROPAGATION_DELAY(buf) (PIM_TLV_GET_UINT16(buf) & 0x7FFF)
58 #define PIM_TLV_GET_OVERRIDE_INTERVAL(buf) PIM_TLV_GET_UINT16(buf)
59 #define PIM_TLV_GET_CAN_DISABLE_JOIN_SUPPRESSION(buf) ((*(const uint8_t *)(buf)) & 0x80)
60 #define PIM_TLV_GET_DR_PRIORITY(buf) PIM_TLV_GET_UINT32(buf)
61 #define PIM_TLV_GET_GENERATION_ID(buf) PIM_TLV_GET_UINT32(buf)
62
63 #define PIM_TLV_TYPE_SIZE (2)
64 #define PIM_TLV_LENGTH_SIZE (2)
65 #define PIM_TLV_MIN_SIZE (PIM_TLV_TYPE_SIZE + PIM_TLV_LENGTH_SIZE)
66 #define PIM_TLV_OPTION_SIZE(option_len) (PIM_TLV_MIN_SIZE + (option_len))
67
68 uint8_t *pim_tlv_append_uint16(uint8_t *buf,
69 const uint8_t *buf_pastend,
70 uint16_t option_type,
71 uint16_t option_value);
72 uint8_t *pim_tlv_append_2uint16(uint8_t *buf,
73 const uint8_t *buf_pastend,
74 uint16_t option_type,
75 uint16_t option_value1,
76 uint16_t option_value2);
77 uint8_t *pim_tlv_append_uint32(uint8_t *buf,
78 const uint8_t *buf_pastend,
79 uint16_t option_type,
80 uint32_t option_value);
81 uint8_t *pim_tlv_append_addrlist_ucast(uint8_t *buf,
82 const uint8_t *buf_pastend,
83 struct list *ifconnected,
84 int family);
85
86 int pim_tlv_parse_holdtime(const char *ifname, struct in_addr src_addr,
87 pim_hello_options *hello_options,
88 uint16_t *hello_option_holdtime,
89 uint16_t option_len,
90 const uint8_t *tlv_curr);
91 int pim_tlv_parse_lan_prune_delay(const char *ifname, struct in_addr src_addr,
92 pim_hello_options *hello_options,
93 uint16_t *hello_option_propagation_delay,
94 uint16_t *hello_option_override_interval,
95 uint16_t option_len,
96 const uint8_t *tlv_curr);
97 int pim_tlv_parse_dr_priority(const char *ifname, struct in_addr src_addr,
98 pim_hello_options *hello_options,
99 uint32_t *hello_option_dr_priority,
100 uint16_t option_len,
101 const uint8_t *tlv_curr);
102 int pim_tlv_parse_generation_id(const char *ifname, struct in_addr src_addr,
103 pim_hello_options *hello_options,
104 uint32_t *hello_option_generation_id,
105 uint16_t option_len,
106 const uint8_t *tlv_curr);
107 int pim_tlv_parse_addr_list(const char *ifname, struct in_addr src_addr,
108 pim_hello_options *hello_options,
109 struct list **hello_option_addr_list,
110 uint16_t option_len,
111 const uint8_t *tlv_curr);
112
113 int pim_encode_addr_ucast (uint8_t *buf, struct prefix *p);
114 int pim_encode_addr_group (uint8_t *buf, afi_t afi, int bidir, int scope, struct in_addr group);
115
116 int pim_parse_addr_ucast (struct prefix *p,
117 const uint8_t *buf,
118 int buf_size);
119 int pim_parse_addr_group (struct prefix_sg *sg,
120 const uint8_t *buf,
121 int buf_size);
122 int pim_parse_addr_source(struct prefix_sg *sg,
123 uint8_t *flags,
124 const uint8_t *buf,
125 int buf_size);
126
127 #endif /* PIM_TLV_H */