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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
28 RFC 3376: 4.1.7. QQIC (Querier's Query Interval Code)
30 If QQIC < 128, QQI = QQIC
31 If QQIC >= 128, QQI = (mant | 0x10) << (exp + 3)
38 Since exp=0..7 then (exp+3)=3..10, then QQI has
39 one of the following bit patterns:
41 exp=0: QQI = 0000.0000.1MMM.M000
42 exp=1: QQI = 0000.0001.MMMM.0000
44 exp=6: QQI = 001M.MMM0.0000.0000
45 exp=7: QQI = 01MM.MM00.0000.0000
49 uint8_t igmp_msg_encode16to8(uint16_t value
)
56 uint16_t mask
= 0x4000;
59 for (exp
= 7; exp
> 0; --exp
) {
64 mant
= 0x000F & (value
>> (exp
+ 3));
65 code
= ((uint8_t)1 << 7) | ((uint8_t)exp
<< 4) | (uint8_t)mant
;
72 RFC 3376: 4.1.7. QQIC (Querier's Query Interval Code)
74 If QQIC < 128, QQI = QQIC
75 If QQIC >= 128, QQI = (mant | 0x10) << (exp + 3)
82 uint16_t igmp_msg_decode8to16(uint8_t code
)
89 uint16_t mant
= (code
& 0x0F);
90 uint8_t exp
= (code
& 0x70) >> 4;
91 value
= (mant
| 0x10) << (exp
+ 3);
97 void pim_pkt_dump(const char *label
, const uint8_t *buf
, int size
)
99 zlog_debug("%s: pkt dump size=%d", label
, size
);
100 zlog_hexdump(buf
, size
);
103 int pim_is_group_224_0_0_0_24(struct in_addr group_addr
)
105 static int first
= 1;
106 static struct prefix group_224
;
110 if (!str2prefix("224.0.0.0/24", &group_224
))
115 group
.family
= AF_INET
;
116 group
.u
.prefix4
= group_addr
;
117 group
.prefixlen
= 32;
119 return prefix_match(&group_224
, &group
);
122 int pim_is_group_224_4(struct in_addr group_addr
)
124 static int first
= 1;
125 static struct prefix group_all
;
129 if (!str2prefix("224.0.0.0/4", &group_all
))
134 group
.family
= AF_INET
;
135 group
.u
.prefix4
= group_addr
;
136 group
.prefixlen
= 32;
138 return prefix_match(&group_all
, &group
);