/*
- PIM for Quagga
- Copyright (C) 2008 Everton da Silva Marques
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; see the file COPYING; if not, write to the
- Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
- MA 02110-1301 USA
-
-*/
+ * PIM for Quagga
+ * Copyright (C) 2008 Everton da Silva Marques
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
#include <zebra.h>
#include "log.h"
+#include "prefix.h"
+#include "plist.h"
#include "pim_util.h"
/*
RFC 3376: 4.1.7. QQIC (Querier's Query Interval Code)
-
+
If QQIC < 128, QQI = QQIC
If QQIC >= 128, QQI = (mant | 0x10) << (exp + 3)
-
+
0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
|1| exp | mant |
+-+-+-+-+-+-+-+-+
-
+
Since exp=0..7 then (exp+3)=3..10, then QQI has
one of the following bit patterns:
-
+
exp=0: QQI = 0000.0000.1MMM.M000
exp=1: QQI = 0000.0001.MMMM.0000
...
*/
uint8_t igmp_msg_encode16to8(uint16_t value)
{
- uint8_t code;
-
- if (value < 128) {
- code = value;
- }
- else {
- uint16_t mask = 0x4000;
- uint8_t exp;
- uint16_t mant;
- for (exp = 7; exp > 0; --exp) {
- if (mask & value)
- break;
- mask >>= 1;
- }
- mant = 0x000F & (value >> (exp + 3));
- code = ((uint8_t) 1 << 7) | ((uint8_t) exp << 4) | (uint8_t) mant;
- }
-
- return code;
+ uint8_t code;
+
+ if (value < 128) {
+ code = value;
+ } else {
+ uint16_t mask = 0x4000;
+ uint8_t exp;
+ uint16_t mant;
+ for (exp = 7; exp > 0; --exp) {
+ if (mask & value)
+ break;
+ mask >>= 1;
+ }
+ mant = 0x000F & (value >> (exp + 3));
+ code = ((uint8_t)1 << 7) | ((uint8_t)exp << 4) | (uint8_t)mant;
+ }
+
+ return code;
}
/*
RFC 3376: 4.1.7. QQIC (Querier's Query Interval Code)
-
+
If QQIC < 128, QQI = QQIC
If QQIC >= 128, QQI = (mant | 0x10) << (exp + 3)
-
+
0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
|1| exp | mant |
*/
uint16_t igmp_msg_decode8to16(uint8_t code)
{
- uint16_t value;
-
- if (code < 128) {
- value = code;
- }
- else {
- uint16_t mant = (code & 0x0F);
- uint8_t exp = (code & 0x70) >> 4;
- value = (mant | 0x10) << (exp + 3);
- }
-
- return value;
+ uint16_t value;
+
+ if (code < 128) {
+ value = code;
+ } else {
+ uint16_t mant = (code & 0x0F);
+ uint8_t exp = (code & 0x70) >> 4;
+ value = (mant | 0x10) << (exp + 3);
+ }
+
+ return value;
}
void pim_pkt_dump(const char *label, const uint8_t *buf, int size)
{
- zlog_debug("%s: pkt dump size=%d",
- label,
- size);
- zlog_hexdump(buf, size);
+ zlog_debug("%s: pkt dump size=%d", label, size);
+ zlog_hexdump(buf, size);
+}
+
+int pim_is_group_224_0_0_0_24(struct in_addr group_addr)
+{
+ static int first = 1;
+ static struct prefix group_224;
+ struct prefix group;
+
+ if (first) {
+ if (!str2prefix("224.0.0.0/24", &group_224))
+ return 0;
+ first = 0;
+ }
+
+ group.family = AF_INET;
+ group.u.prefix4 = group_addr;
+ group.prefixlen = IPV4_MAX_PREFIXLEN;
+
+ return prefix_match(&group_224, &group);
+}
+
+int pim_is_group_224_4(struct in_addr group_addr)
+{
+ static int first = 1;
+ static struct prefix group_all;
+ struct prefix group;
+
+ if (first) {
+ if (!str2prefix("224.0.0.0/4", &group_all))
+ return 0;
+ first = 0;
+ }
+
+ group.family = AF_INET;
+ group.u.prefix4 = group_addr;
+ group.prefixlen = 32;
+
+ return prefix_match(&group_all, &group);
+}
+
+bool pim_is_group_filtered(struct pim_interface *pim_ifp, struct in_addr *grp)
+{
+ struct prefix grp_pfx;
+ struct prefix_list *pl;
+
+ if (!pim_ifp->boundary_oil_plist)
+ return false;
+
+ grp_pfx.family = AF_INET;
+ grp_pfx.prefixlen = 32;
+ grp_pfx.u.prefix4 = *grp;
+
+ pl = prefix_list_lookup(AFI_IP, pim_ifp->boundary_oil_plist);
+ return pl ? prefix_list_apply(pl, &grp_pfx) == PREFIX_DENY : false;
}
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