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8083e71356
New correct behavior: eva# conf eva(config)# ip pim rp 192.168.1.224 224.0.0.0/24 No Path to RP address specified: 192.168.1.224 eva(config)# ip pim rp 224.1.2.3 224.0.0.0/24 % Bad RP address specified: 224.1.2.3 eva(config)# Fixes: #12970 Signed-off-by: Donald Sharp <sharpd@nvidia.com>
170 lines
3.2 KiB
C
170 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* PIM for Quagga
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* Copyright (C) 2008 Everton da Silva Marques
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*/
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#include <zebra.h>
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#include "log.h"
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#include "prefix.h"
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#include "plist.h"
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#include "pim_util.h"
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/*
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RFC 3376: 4.1.7. QQIC (Querier's Query Interval Code)
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If QQIC < 128, QQI = QQIC
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If QQIC >= 128, QQI = (mant | 0x10) << (exp + 3)
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0 1 2 3 4 5 6 7
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+-+-+-+-+-+-+-+-+
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|1| exp | mant |
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+-+-+-+-+-+-+-+-+
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Since exp=0..7 then (exp+3)=3..10, then QQI has
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one of the following bit patterns:
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exp=0: QQI = 0000.0000.1MMM.M000
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exp=1: QQI = 0000.0001.MMMM.0000
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...
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exp=6: QQI = 001M.MMM0.0000.0000
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exp=7: QQI = 01MM.MM00.0000.0000
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--------- ---------
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0x4 0x0 0x0 0x0
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*/
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uint8_t igmp_msg_encode16to8(uint16_t value)
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{
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uint8_t code;
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if (value < 128) {
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code = value;
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} else {
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uint16_t mask = 0x4000;
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uint8_t exp;
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uint16_t mant;
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for (exp = 7; exp > 0; --exp) {
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if (mask & value)
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break;
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mask >>= 1;
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}
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mant = 0x000F & (value >> (exp + 3));
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code = ((uint8_t)1 << 7) | ((uint8_t)exp << 4) | (uint8_t)mant;
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}
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return code;
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}
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/*
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RFC 3376: 4.1.7. QQIC (Querier's Query Interval Code)
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If QQIC < 128, QQI = QQIC
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If QQIC >= 128, QQI = (mant | 0x10) << (exp + 3)
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0 1 2 3 4 5 6 7
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+-+-+-+-+-+-+-+-+
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|1| exp | mant |
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+-+-+-+-+-+-+-+-+
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*/
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uint16_t igmp_msg_decode8to16(uint8_t code)
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{
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uint16_t value;
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if (code < 128) {
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value = code;
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} else {
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uint16_t mant = (code & 0x0F);
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uint8_t exp = (code & 0x70) >> 4;
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value = (mant | 0x10) << (exp + 3);
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}
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return value;
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}
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void pim_pkt_dump(const char *label, const uint8_t *buf, int size)
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{
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zlog_debug("%s: pkt dump size=%d", label, size);
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zlog_hexdump(buf, size);
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}
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int pim_is_group_224_0_0_0_24(struct in_addr group_addr)
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{
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static int first = 1;
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static struct prefix group_224;
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struct prefix group;
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if (first) {
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if (!str2prefix("224.0.0.0/24", &group_224))
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return 0;
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first = 0;
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}
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group.family = AF_INET;
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group.u.prefix4 = group_addr;
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group.prefixlen = IPV4_MAX_BITLEN;
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return prefix_match(&group_224, &group);
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}
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int pim_is_group_224_4(struct in_addr group_addr)
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{
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static int first = 1;
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static struct prefix group_all;
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struct prefix group;
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if (first) {
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if (!str2prefix("224.0.0.0/4", &group_all))
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return 0;
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first = 0;
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}
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group.family = AF_INET;
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group.u.prefix4 = group_addr;
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group.prefixlen = IPV4_MAX_BITLEN;
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return prefix_match(&group_all, &group);
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}
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bool pim_is_group_filtered(struct pim_interface *pim_ifp, pim_addr *grp)
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{
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struct prefix grp_pfx;
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struct prefix_list *pl;
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if (!pim_ifp->boundary_oil_plist)
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return false;
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pim_addr_to_prefix(&grp_pfx, *grp);
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pl = prefix_list_lookup(PIM_AFI, pim_ifp->boundary_oil_plist);
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return pl ? prefix_list_apply_ext(pl, NULL, &grp_pfx, true) ==
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PREFIX_DENY
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: false;
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}
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/* This function returns all multicast group */
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int pim_get_all_mcast_group(struct prefix *prefix)
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{
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#if PIM_IPV == 4
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if (!str2prefix("224.0.0.0/4", prefix))
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return 0;
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#else
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if (!str2prefix("FF00::0/8", prefix))
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return 0;
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#endif
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return 1;
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}
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bool pim_addr_is_multicast(pim_addr addr)
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{
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#if PIM_IPV == 4
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if (IN_MULTICAST(ntohl(addr.s_addr)))
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return true;
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#else
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if (IN6_IS_ADDR_MULTICAST(&addr))
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return true;
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#endif
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return false;
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}
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