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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
29 RFC 3376: 4.1.7. QQIC (Querier's Query Interval Code)
31 If QQIC < 128, QQI = QQIC
32 If QQIC >= 128, QQI = (mant | 0x10) << (exp + 3)
39 Since exp=0..7 then (exp+3)=3..10, then QQI has
40 one of the following bit patterns:
42 exp=0: QQI = 0000.0000.1MMM.M000
43 exp=1: QQI = 0000.0001.MMMM.0000
45 exp=6: QQI = 001M.MMM0.0000.0000
46 exp=7: QQI = 01MM.MM00.0000.0000
50 uint8_t igmp_msg_encode16to8(uint16_t value
)
57 uint16_t mask
= 0x4000;
60 for (exp
= 7; exp
> 0; --exp
) {
65 mant
= 0x000F & (value
>> (exp
+ 3));
66 code
= ((uint8_t)1 << 7) | ((uint8_t)exp
<< 4) | (uint8_t)mant
;
73 RFC 3376: 4.1.7. QQIC (Querier's Query Interval Code)
75 If QQIC < 128, QQI = QQIC
76 If QQIC >= 128, QQI = (mant | 0x10) << (exp + 3)
83 uint16_t igmp_msg_decode8to16(uint8_t code
)
90 uint16_t mant
= (code
& 0x0F);
91 uint8_t exp
= (code
& 0x70) >> 4;
92 value
= (mant
| 0x10) << (exp
+ 3);
98 void pim_pkt_dump(const char *label
, const uint8_t *buf
, int size
)
100 zlog_debug("%s: pkt dump size=%d", label
, size
);
101 zlog_hexdump(buf
, size
);
104 int pim_is_group_224_0_0_0_24(struct in_addr group_addr
)
106 static int first
= 1;
107 static struct prefix group_224
;
111 if (!str2prefix("224.0.0.0/24", &group_224
))
116 group
.family
= AF_INET
;
117 group
.u
.prefix4
= group_addr
;
118 group
.prefixlen
= IPV4_MAX_PREFIXLEN
;
120 return prefix_match(&group_224
, &group
);
123 int pim_is_group_224_4(struct in_addr group_addr
)
125 static int first
= 1;
126 static struct prefix group_all
;
130 if (!str2prefix("224.0.0.0/4", &group_all
))
135 group
.family
= AF_INET
;
136 group
.u
.prefix4
= group_addr
;
137 group
.prefixlen
= 32;
139 return prefix_match(&group_all
, &group
);
142 bool pim_is_group_filtered(struct pim_interface
*pim_ifp
, struct in_addr
*grp
)
144 struct prefix grp_pfx
;
145 struct prefix_list
*pl
;
147 if (!pim_ifp
->boundary_oil_plist
)
150 grp_pfx
.family
= AF_INET
;
151 grp_pfx
.prefixlen
= 32;
152 grp_pfx
.u
.prefix4
= *grp
;
154 pl
= prefix_list_lookup(AFI_IP
, pim_ifp
->boundary_oil_plist
);
155 return pl
? prefix_list_apply(pl
, &grp_pfx
) == PREFIX_DENY
: false;