| 1 |
1275 |
phoenix |
/*
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| 2 |
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* Multicast support for IPv6
|
| 3 |
|
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* Linux INET6 implementation
|
| 4 |
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*
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| 5 |
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* Authors:
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| 6 |
|
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* Pedro Roque <roque@di.fc.ul.pt>
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| 7 |
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*
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| 8 |
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* $Id: mcast.c,v 1.1.1.1 2004-04-15 01:14:41 phoenix Exp $
|
| 9 |
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*
|
| 10 |
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* Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c
|
| 11 |
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*
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| 12 |
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* This program is free software; you can redistribute it and/or
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| 13 |
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* modify it under the terms of the GNU General Public License
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| 14 |
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* as published by the Free Software Foundation; either version
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| 15 |
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* 2 of the License, or (at your option) any later version.
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| 16 |
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*/
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| 17 |
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| 18 |
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/* Changes:
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| 19 |
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*
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| 20 |
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* yoshfuji : fix format of router-alert option
|
| 21 |
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* YOSHIFUJI Hideaki @USAGI:
|
| 22 |
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* Fixed source address for MLD message based on
|
| 23 |
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* <draft-ietf-magma-mld-source-02.txt>.
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| 24 |
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* YOSHIFUJI Hideaki @USAGI:
|
| 25 |
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* - Ignore Queries for invalid addresses.
|
| 26 |
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* - MLD for link-local addresses.
|
| 27 |
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* David L Stevens <dlstevens@us.ibm.com>:
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| 28 |
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- MLDv2 support
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| 29 |
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*/
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| 30 |
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| 31 |
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#include <linux/config.h>
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| 32 |
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#include <linux/module.h>
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| 33 |
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#include <linux/errno.h>
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| 34 |
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#include <linux/types.h>
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| 35 |
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#include <linux/string.h>
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| 36 |
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#include <linux/socket.h>
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| 37 |
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#include <linux/sockios.h>
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| 38 |
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#include <linux/sched.h>
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| 39 |
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#include <linux/net.h>
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| 40 |
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#include <linux/in.h>
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| 41 |
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#include <linux/in6.h>
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| 42 |
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#include <linux/netdevice.h>
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| 43 |
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#include <linux/if_arp.h>
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| 44 |
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#include <linux/route.h>
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| 45 |
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#include <linux/init.h>
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| 46 |
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#include <linux/proc_fs.h>
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| 47 |
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| 48 |
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#include <linux/netfilter.h>
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| 49 |
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#include <linux/netfilter_ipv6.h>
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| 50 |
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| 51 |
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#include <net/sock.h>
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| 52 |
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#include <net/snmp.h>
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| 53 |
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| 54 |
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#include <net/ipv6.h>
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| 55 |
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#include <net/protocol.h>
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| 56 |
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#include <net/if_inet6.h>
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| 57 |
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#include <net/ndisc.h>
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| 58 |
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#include <net/addrconf.h>
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| 59 |
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#include <net/ip6_route.h>
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| 61 |
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#include <net/checksum.h>
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| 62 |
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| 63 |
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/* Set to 3 to get tracing... */
|
| 64 |
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#define MCAST_DEBUG 2
|
| 65 |
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| 66 |
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#if MCAST_DEBUG >= 3
|
| 67 |
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#define MDBG(x) printk x
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| 68 |
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#else
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| 69 |
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#define MDBG(x)
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| 70 |
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#endif
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| 72 |
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/*
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| 73 |
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* These header formats should be in a separate include file, but icmpv6.h
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| 74 |
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* doesn't have in6_addr defined in all cases, there is no __u128, and no
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| 75 |
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* other files reference these.
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| 76 |
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*
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| 77 |
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* +-DLS 4/14/03
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| 78 |
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*/
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| 79 |
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| 80 |
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/* Multicast Listener Discovery version 2 headers */
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| 81 |
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| 82 |
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struct mld2_grec {
|
| 83 |
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__u8 grec_type;
|
| 84 |
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__u8 grec_auxwords;
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| 85 |
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__u16 grec_nsrcs;
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| 86 |
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struct in6_addr grec_mca;
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| 87 |
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struct in6_addr grec_src[0];
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| 88 |
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};
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| 89 |
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| 90 |
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struct mld2_report {
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| 91 |
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__u8 type;
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| 92 |
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__u8 resv1;
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| 93 |
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__u16 csum;
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| 94 |
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__u16 resv2;
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| 95 |
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__u16 ngrec;
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| 96 |
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struct mld2_grec grec[0];
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| 97 |
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};
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| 98 |
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| 99 |
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struct mld2_query {
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| 100 |
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__u8 type;
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| 101 |
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__u8 code;
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| 102 |
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__u16 csum;
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| 103 |
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__u16 mrc;
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| 104 |
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__u16 resv1;
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| 105 |
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struct in6_addr mca;
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| 106 |
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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| 107 |
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__u8 qrv:3,
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| 108 |
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suppress:1,
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| 109 |
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resv2:4;
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| 110 |
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#elif defined(__BIG_ENDIAN_BITFIELD)
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| 111 |
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__u8 resv2:4,
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| 112 |
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suppress:1,
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| 113 |
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qrv:3;
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| 114 |
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#else
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| 115 |
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#error "Please fix <asm/byteorder.h>"
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| 116 |
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#endif
|
| 117 |
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__u8 qqic;
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| 118 |
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__u16 nsrcs;
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| 119 |
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struct in6_addr srcs[0];
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| 120 |
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};
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| 121 |
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| 122 |
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struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
|
| 123 |
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struct in6_addr all_nodes_addr = {{{0xff,0x02,0,0,0,0,0,0,0,0,0,0,0,0,0,0x1}}};
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| 124 |
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| 125 |
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/* Big mc list lock for all the sockets */
|
| 126 |
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static rwlock_t ipv6_sk_mc_lock = RW_LOCK_UNLOCKED;
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| 127 |
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| 128 |
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static struct socket *igmp6_socket;
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| 129 |
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| 130 |
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static void igmp6_join_group(struct ifmcaddr6 *ma);
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| 131 |
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static void igmp6_leave_group(struct ifmcaddr6 *ma);
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| 132 |
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static void igmp6_timer_handler(unsigned long data);
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| 133 |
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| 134 |
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static void mld_gq_timer_expire(unsigned long data);
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| 135 |
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static void mld_ifc_timer_expire(unsigned long data);
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| 136 |
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static void mld_ifc_event(struct inet6_dev *idev);
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| 137 |
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static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc);
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| 138 |
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static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *addr);
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| 139 |
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static void mld_clear_delrec(struct inet6_dev *idev);
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| 140 |
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static int sf_setstate(struct ifmcaddr6 *pmc);
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| 141 |
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static void sf_markstate(struct ifmcaddr6 *pmc);
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| 142 |
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static void ip6_mc_clear_src(struct ifmcaddr6 *pmc);
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| 143 |
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int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, int sfmode,
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| 144 |
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int sfcount, struct in6_addr *psfsrc, int delta);
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| 145 |
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int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, int sfmode,
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| 146 |
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int sfcount, struct in6_addr *psfsrc, int delta);
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| 147 |
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int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
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| 148 |
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struct inet6_dev *idev);
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| 149 |
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| 150 |
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| 151 |
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#define IGMP6_UNSOLICITED_IVAL (10*HZ)
|
| 152 |
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#define MLD_QRV_DEFAULT 2
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| 153 |
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| 154 |
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#define MLD_V1_SEEN(idev) ((idev)->mc_v1_seen && \
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| 155 |
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time_before(jiffies, (idev)->mc_v1_seen))
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| 156 |
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| 157 |
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#define MLDV2_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
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| 158 |
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#define MLDV2_EXP(thresh, nbmant, nbexp, value) \
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| 159 |
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((value) < (thresh) ? (value) : \
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| 160 |
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((MLDV2_MASK(value, nbmant) | (1<<(nbmant+nbexp))) << \
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| 161 |
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(MLDV2_MASK((value) >> (nbmant), nbexp) + (nbexp))))
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| 162 |
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| 163 |
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#define MLDV2_QQIC(value) MLDV2_EXP(0x80, 4, 3, value)
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| 164 |
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#define MLDV2_MRC(value) MLDV2_EXP(0x8000, 12, 3, value)
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| 165 |
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| 166 |
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#define IPV6_MLD_MAX_MSF 10
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| 167 |
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| 168 |
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int sysctl_mld_max_msf = IPV6_MLD_MAX_MSF;
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| 169 |
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| 170 |
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/*
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| 171 |
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* socket join on multicast group
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| 172 |
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*/
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| 173 |
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| 174 |
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int ipv6_sock_mc_join(struct sock *sk, int ifindex, struct in6_addr *addr)
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| 175 |
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{
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| 176 |
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struct net_device *dev = NULL;
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| 177 |
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struct ipv6_mc_socklist *mc_lst;
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| 178 |
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struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
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| 179 |
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int err;
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| 180 |
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| 181 |
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if (!(ipv6_addr_type(addr) & IPV6_ADDR_MULTICAST))
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| 182 |
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return -EINVAL;
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| 183 |
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| 184 |
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mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);
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| 185 |
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| 186 |
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if (mc_lst == NULL)
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| 187 |
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return -ENOMEM;
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| 188 |
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| 189 |
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mc_lst->next = NULL;
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| 190 |
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memcpy(&mc_lst->addr, addr, sizeof(struct in6_addr));
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| 191 |
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| 192 |
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if (ifindex == 0) {
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| 193 |
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struct rt6_info *rt;
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| 194 |
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rt = rt6_lookup(addr, NULL, 0, 0);
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| 195 |
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if (rt) {
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| 196 |
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dev = rt->rt6i_dev;
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| 197 |
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dev_hold(dev);
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| 198 |
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dst_release(&rt->u.dst);
|
| 199 |
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}
|
| 200 |
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} else
|
| 201 |
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dev = dev_get_by_index(ifindex);
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| 202 |
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|
| 203 |
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if (dev == NULL) {
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| 204 |
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sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
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| 205 |
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return -ENODEV;
|
| 206 |
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}
|
| 207 |
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|
| 208 |
|
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mc_lst->ifindex = dev->ifindex;
|
| 209 |
|
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mc_lst->sfmode = MCAST_EXCLUDE;
|
| 210 |
|
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mc_lst->sflist = 0;
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| 211 |
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|
| 212 |
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/*
|
| 213 |
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* now add/increase the group membership on the device
|
| 214 |
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*/
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| 215 |
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| 216 |
|
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err = ipv6_dev_mc_inc(dev, addr);
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| 217 |
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| 218 |
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if (err) {
|
| 219 |
|
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sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
|
| 220 |
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dev_put(dev);
|
| 221 |
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return err;
|
| 222 |
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}
|
| 223 |
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|
| 224 |
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write_lock_bh(&ipv6_sk_mc_lock);
|
| 225 |
|
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mc_lst->next = np->ipv6_mc_list;
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| 226 |
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np->ipv6_mc_list = mc_lst;
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| 227 |
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write_unlock_bh(&ipv6_sk_mc_lock);
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| 228 |
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| 229 |
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dev_put(dev);
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| 230 |
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| 231 |
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return 0;
|
| 232 |
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}
|
| 233 |
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|
| 234 |
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/*
|
| 235 |
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* socket leave on multicast group
|
| 236 |
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*/
|
| 237 |
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int ipv6_sock_mc_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
|
| 238 |
|
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{
|
| 239 |
|
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struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
|
| 240 |
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struct ipv6_mc_socklist *mc_lst, **lnk;
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| 241 |
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| 242 |
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write_lock_bh(&ipv6_sk_mc_lock);
|
| 243 |
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for (lnk = &np->ipv6_mc_list; (mc_lst = *lnk) !=NULL ; lnk = &mc_lst->next) {
|
| 244 |
|
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if (mc_lst->ifindex == ifindex &&
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| 245 |
|
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ipv6_addr_cmp(&mc_lst->addr, addr) == 0) {
|
| 246 |
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struct net_device *dev;
|
| 247 |
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|
| 248 |
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*lnk = mc_lst->next;
|
| 249 |
|
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write_unlock_bh(&ipv6_sk_mc_lock);
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| 250 |
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| 251 |
|
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if ((dev = dev_get_by_index(ifindex)) != NULL) {
|
| 252 |
|
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struct inet6_dev *idev = in6_dev_get(dev);
|
| 253 |
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|
| 254 |
|
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if (idev) {
|
| 255 |
|
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(void) ip6_mc_leave_src(sk,mc_lst,idev);
|
| 256 |
|
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in6_dev_put(idev);
|
| 257 |
|
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}
|
| 258 |
|
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ipv6_dev_mc_dec(dev, &mc_lst->addr);
|
| 259 |
|
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dev_put(dev);
|
| 260 |
|
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}
|
| 261 |
|
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sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
|
| 262 |
|
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return 0;
|
| 263 |
|
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}
|
| 264 |
|
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}
|
| 265 |
|
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write_unlock_bh(&ipv6_sk_mc_lock);
|
| 266 |
|
|
|
| 267 |
|
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return -ENOENT;
|
| 268 |
|
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}
|
| 269 |
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|
| 270 |
|
|
struct inet6_dev *ip6_mc_find_dev(struct in6_addr *group, int ifindex)
|
| 271 |
|
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{
|
| 272 |
|
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struct net_device *dev = 0;
|
| 273 |
|
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struct inet6_dev *idev = 0;
|
| 274 |
|
|
|
| 275 |
|
|
if (ifindex == 0) {
|
| 276 |
|
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struct rt6_info *rt;
|
| 277 |
|
|
|
| 278 |
|
|
rt = rt6_lookup(group, NULL, 0, 0);
|
| 279 |
|
|
if (rt) {
|
| 280 |
|
|
dev = rt->rt6i_dev;
|
| 281 |
|
|
dev_hold(dev);
|
| 282 |
|
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dst_release(&rt->u.dst);
|
| 283 |
|
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}
|
| 284 |
|
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} else
|
| 285 |
|
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dev = dev_get_by_index(ifindex);
|
| 286 |
|
|
|
| 287 |
|
|
if (!dev)
|
| 288 |
|
|
return 0;
|
| 289 |
|
|
idev = in6_dev_get(dev);
|
| 290 |
|
|
if (!idev) {
|
| 291 |
|
|
dev_put(dev);
|
| 292 |
|
|
return 0;
|
| 293 |
|
|
}
|
| 294 |
|
|
read_lock_bh(&idev->lock);
|
| 295 |
|
|
if (idev->dead) {
|
| 296 |
|
|
read_unlock_bh(&idev->lock);
|
| 297 |
|
|
in6_dev_put(idev);
|
| 298 |
|
|
dev_put(dev);
|
| 299 |
|
|
return 0;
|
| 300 |
|
|
}
|
| 301 |
|
|
return idev;
|
| 302 |
|
|
}
|
| 303 |
|
|
|
| 304 |
|
|
void ipv6_sock_mc_close(struct sock *sk)
|
| 305 |
|
|
{
|
| 306 |
|
|
struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
|
| 307 |
|
|
struct ipv6_mc_socklist *mc_lst;
|
| 308 |
|
|
|
| 309 |
|
|
write_lock_bh(&ipv6_sk_mc_lock);
|
| 310 |
|
|
while ((mc_lst = np->ipv6_mc_list) != NULL) {
|
| 311 |
|
|
struct net_device *dev;
|
| 312 |
|
|
|
| 313 |
|
|
np->ipv6_mc_list = mc_lst->next;
|
| 314 |
|
|
write_unlock_bh(&ipv6_sk_mc_lock);
|
| 315 |
|
|
|
| 316 |
|
|
dev = dev_get_by_index(mc_lst->ifindex);
|
| 317 |
|
|
if (dev) {
|
| 318 |
|
|
struct inet6_dev *idev = in6_dev_get(dev);
|
| 319 |
|
|
|
| 320 |
|
|
if (idev) {
|
| 321 |
|
|
(void) ip6_mc_leave_src(sk, mc_lst, idev);
|
| 322 |
|
|
in6_dev_put(idev);
|
| 323 |
|
|
}
|
| 324 |
|
|
ipv6_dev_mc_dec(dev, &mc_lst->addr);
|
| 325 |
|
|
dev_put(dev);
|
| 326 |
|
|
}
|
| 327 |
|
|
|
| 328 |
|
|
sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
|
| 329 |
|
|
|
| 330 |
|
|
write_lock_bh(&ipv6_sk_mc_lock);
|
| 331 |
|
|
}
|
| 332 |
|
|
write_unlock_bh(&ipv6_sk_mc_lock);
|
| 333 |
|
|
}
|
| 334 |
|
|
|
| 335 |
|
|
int ip6_mc_source(int add, int omode, struct sock *sk,
|
| 336 |
|
|
struct group_source_req *pgsr)
|
| 337 |
|
|
{
|
| 338 |
|
|
struct in6_addr *source, *group;
|
| 339 |
|
|
struct ipv6_mc_socklist *pmc;
|
| 340 |
|
|
struct net_device *dev;
|
| 341 |
|
|
struct inet6_dev *idev;
|
| 342 |
|
|
struct ipv6_pinfo *inet6 = &sk->net_pinfo.af_inet6;
|
| 343 |
|
|
struct ip6_sf_socklist *psl;
|
| 344 |
|
|
int i, j, rv;
|
| 345 |
|
|
int err;
|
| 346 |
|
|
|
| 347 |
|
|
if (pgsr->gsr_group.ss_family != AF_INET6 ||
|
| 348 |
|
|
pgsr->gsr_source.ss_family != AF_INET6)
|
| 349 |
|
|
return -EINVAL;
|
| 350 |
|
|
|
| 351 |
|
|
source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
|
| 352 |
|
|
group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
|
| 353 |
|
|
|
| 354 |
|
|
if (!(ipv6_addr_type(group) & IPV6_ADDR_MULTICAST))
|
| 355 |
|
|
return -EINVAL;
|
| 356 |
|
|
|
| 357 |
|
|
idev = ip6_mc_find_dev(group, pgsr->gsr_interface);
|
| 358 |
|
|
if (!idev)
|
| 359 |
|
|
return -ENODEV;
|
| 360 |
|
|
dev = idev->dev;
|
| 361 |
|
|
|
| 362 |
|
|
err = -EADDRNOTAVAIL;
|
| 363 |
|
|
|
| 364 |
|
|
for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
|
| 365 |
|
|
if (pmc->ifindex != pgsr->gsr_interface)
|
| 366 |
|
|
continue;
|
| 367 |
|
|
if (ipv6_addr_cmp(&pmc->addr, group) == 0)
|
| 368 |
|
|
break;
|
| 369 |
|
|
}
|
| 370 |
|
|
if (!pmc) /* must have a prior join */
|
| 371 |
|
|
goto done;
|
| 372 |
|
|
/* if a source filter was set, must be the same mode as before */
|
| 373 |
|
|
if (pmc->sflist) {
|
| 374 |
|
|
if (pmc->sfmode != omode)
|
| 375 |
|
|
goto done;
|
| 376 |
|
|
} else if (pmc->sfmode != omode) {
|
| 377 |
|
|
/* allow mode switches for empty-set filters */
|
| 378 |
|
|
ip6_mc_add_src(idev, group, omode, 0, 0, 0);
|
| 379 |
|
|
ip6_mc_del_src(idev, group, pmc->sfmode, 0, 0, 0);
|
| 380 |
|
|
pmc->sfmode = omode;
|
| 381 |
|
|
}
|
| 382 |
|
|
|
| 383 |
|
|
psl = pmc->sflist;
|
| 384 |
|
|
if (!add) {
|
| 385 |
|
|
if (!psl)
|
| 386 |
|
|
goto done;
|
| 387 |
|
|
rv = !0;
|
| 388 |
|
|
for (i=0; i<psl->sl_count; i++) {
|
| 389 |
|
|
rv = memcmp(&psl->sl_addr, group,
|
| 390 |
|
|
sizeof(struct in6_addr));
|
| 391 |
|
|
if (rv >= 0)
|
| 392 |
|
|
break;
|
| 393 |
|
|
}
|
| 394 |
|
|
if (!rv) /* source not found */
|
| 395 |
|
|
goto done;
|
| 396 |
|
|
|
| 397 |
|
|
/* update the interface filter */
|
| 398 |
|
|
ip6_mc_del_src(idev, group, omode, 1, source, 1);
|
| 399 |
|
|
|
| 400 |
|
|
for (j=i+1; j<psl->sl_count; j++)
|
| 401 |
|
|
psl->sl_addr[j-1] = psl->sl_addr[j];
|
| 402 |
|
|
psl->sl_count--;
|
| 403 |
|
|
err = 0;
|
| 404 |
|
|
goto done;
|
| 405 |
|
|
}
|
| 406 |
|
|
/* else, add a new source to the filter */
|
| 407 |
|
|
|
| 408 |
|
|
if (psl && psl->sl_count >= sysctl_mld_max_msf) {
|
| 409 |
|
|
err = -ENOBUFS;
|
| 410 |
|
|
goto done;
|
| 411 |
|
|
}
|
| 412 |
|
|
if (!psl || psl->sl_count == psl->sl_max) {
|
| 413 |
|
|
struct ip6_sf_socklist *newpsl;
|
| 414 |
|
|
int count = IP6_SFBLOCK;
|
| 415 |
|
|
|
| 416 |
|
|
if (psl)
|
| 417 |
|
|
count += psl->sl_max;
|
| 418 |
|
|
newpsl = (struct ip6_sf_socklist *)sock_kmalloc(sk,
|
| 419 |
|
|
IP6_SFLSIZE(count), GFP_ATOMIC);
|
| 420 |
|
|
if (!newpsl) {
|
| 421 |
|
|
err = -ENOBUFS;
|
| 422 |
|
|
goto done;
|
| 423 |
|
|
}
|
| 424 |
|
|
newpsl->sl_max = count;
|
| 425 |
|
|
newpsl->sl_count = count - IP6_SFBLOCK;
|
| 426 |
|
|
if (psl) {
|
| 427 |
|
|
for (i=0; i<psl->sl_count; i++)
|
| 428 |
|
|
newpsl->sl_addr[i] = psl->sl_addr[i];
|
| 429 |
|
|
sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
|
| 430 |
|
|
}
|
| 431 |
|
|
pmc->sflist = psl = newpsl;
|
| 432 |
|
|
}
|
| 433 |
|
|
rv = 1; /* > 0 for insert logic below if sl_count is 0 */
|
| 434 |
|
|
for (i=0; i<psl->sl_count; i++) {
|
| 435 |
|
|
rv = memcmp(&psl->sl_addr, group, sizeof(struct in6_addr));
|
| 436 |
|
|
if (rv >= 0)
|
| 437 |
|
|
break;
|
| 438 |
|
|
}
|
| 439 |
|
|
if (rv == 0) /* address already there is an error */
|
| 440 |
|
|
goto done;
|
| 441 |
|
|
for (j=psl->sl_count-1; j>=i; j--)
|
| 442 |
|
|
psl->sl_addr[j+1] = psl->sl_addr[j];
|
| 443 |
|
|
psl->sl_addr[i] = *source;
|
| 444 |
|
|
psl->sl_count++;
|
| 445 |
|
|
err = 0;
|
| 446 |
|
|
/* update the interface list */
|
| 447 |
|
|
ip6_mc_add_src(idev, group, omode, 1, source, 1);
|
| 448 |
|
|
done:
|
| 449 |
|
|
read_unlock_bh(&idev->lock);
|
| 450 |
|
|
in6_dev_put(idev);
|
| 451 |
|
|
dev_put(dev);
|
| 452 |
|
|
return err;
|
| 453 |
|
|
}
|
| 454 |
|
|
|
| 455 |
|
|
int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
|
| 456 |
|
|
{
|
| 457 |
|
|
struct in6_addr *group;
|
| 458 |
|
|
struct ipv6_mc_socklist *pmc;
|
| 459 |
|
|
struct net_device *dev;
|
| 460 |
|
|
struct inet6_dev *idev;
|
| 461 |
|
|
struct ipv6_pinfo *inet6 = &sk->net_pinfo.af_inet6;
|
| 462 |
|
|
struct ip6_sf_socklist *newpsl, *psl;
|
| 463 |
|
|
int i, err;
|
| 464 |
|
|
|
| 465 |
|
|
group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
|
| 466 |
|
|
|
| 467 |
|
|
if (!(ipv6_addr_type(group) & IPV6_ADDR_MULTICAST))
|
| 468 |
|
|
return -EINVAL;
|
| 469 |
|
|
if (gsf->gf_fmode != MCAST_INCLUDE &&
|
| 470 |
|
|
gsf->gf_fmode != MCAST_EXCLUDE)
|
| 471 |
|
|
return -EINVAL;
|
| 472 |
|
|
|
| 473 |
|
|
idev = ip6_mc_find_dev(group, gsf->gf_interface);
|
| 474 |
|
|
|
| 475 |
|
|
if (!idev)
|
| 476 |
|
|
return -ENODEV;
|
| 477 |
|
|
dev = idev->dev;
|
| 478 |
|
|
err = -EADDRNOTAVAIL;
|
| 479 |
|
|
|
| 480 |
|
|
for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
|
| 481 |
|
|
if (pmc->ifindex != gsf->gf_interface)
|
| 482 |
|
|
continue;
|
| 483 |
|
|
if (ipv6_addr_cmp(&pmc->addr, group) == 0)
|
| 484 |
|
|
break;
|
| 485 |
|
|
}
|
| 486 |
|
|
if (!pmc) /* must have a prior join */
|
| 487 |
|
|
goto done;
|
| 488 |
|
|
if (gsf->gf_numsrc) {
|
| 489 |
|
|
newpsl = (struct ip6_sf_socklist *)sock_kmalloc(sk,
|
| 490 |
|
|
IP6_SFLSIZE(gsf->gf_numsrc), GFP_ATOMIC);
|
| 491 |
|
|
if (!newpsl) {
|
| 492 |
|
|
err = -ENOBUFS;
|
| 493 |
|
|
goto done;
|
| 494 |
|
|
}
|
| 495 |
|
|
newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
|
| 496 |
|
|
for (i=0; i<newpsl->sl_count; ++i) {
|
| 497 |
|
|
struct sockaddr_in6 *psin6;
|
| 498 |
|
|
|
| 499 |
|
|
psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
|
| 500 |
|
|
newpsl->sl_addr[i] = psin6->sin6_addr;
|
| 501 |
|
|
}
|
| 502 |
|
|
err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
|
| 503 |
|
|
newpsl->sl_count, newpsl->sl_addr, 0);
|
| 504 |
|
|
if (err) {
|
| 505 |
|
|
sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
|
| 506 |
|
|
goto done;
|
| 507 |
|
|
}
|
| 508 |
|
|
} else
|
| 509 |
|
|
newpsl = 0;
|
| 510 |
|
|
psl = pmc->sflist;
|
| 511 |
|
|
if (psl) {
|
| 512 |
|
|
(void) ip6_mc_del_src(idev, group, pmc->sfmode,
|
| 513 |
|
|
psl->sl_count, psl->sl_addr, 0);
|
| 514 |
|
|
sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
|
| 515 |
|
|
} else
|
| 516 |
|
|
(void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, 0, 0);
|
| 517 |
|
|
pmc->sflist = newpsl;
|
| 518 |
|
|
pmc->sfmode = gsf->gf_fmode;
|
| 519 |
|
|
done:
|
| 520 |
|
|
read_unlock_bh(&idev->lock);
|
| 521 |
|
|
in6_dev_put(idev);
|
| 522 |
|
|
dev_put(dev);
|
| 523 |
|
|
return err;
|
| 524 |
|
|
}
|
| 525 |
|
|
|
| 526 |
|
|
int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
|
| 527 |
|
|
struct group_filter *optval, int *optlen)
|
| 528 |
|
|
{
|
| 529 |
|
|
int err, i, count, copycount;
|
| 530 |
|
|
struct in6_addr *group;
|
| 531 |
|
|
struct ipv6_mc_socklist *pmc;
|
| 532 |
|
|
struct inet6_dev *idev;
|
| 533 |
|
|
struct net_device *dev;
|
| 534 |
|
|
struct ipv6_pinfo *inet6 = &sk->net_pinfo.af_inet6;
|
| 535 |
|
|
struct ip6_sf_socklist *psl;
|
| 536 |
|
|
|
| 537 |
|
|
group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
|
| 538 |
|
|
|
| 539 |
|
|
if (!(ipv6_addr_type(group) & IPV6_ADDR_MULTICAST))
|
| 540 |
|
|
return -EINVAL;
|
| 541 |
|
|
|
| 542 |
|
|
idev = ip6_mc_find_dev(group, gsf->gf_interface);
|
| 543 |
|
|
|
| 544 |
|
|
if (!idev)
|
| 545 |
|
|
return -ENODEV;
|
| 546 |
|
|
|
| 547 |
|
|
dev = idev->dev;
|
| 548 |
|
|
|
| 549 |
|
|
err = -EADDRNOTAVAIL;
|
| 550 |
|
|
|
| 551 |
|
|
for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
|
| 552 |
|
|
if (pmc->ifindex != gsf->gf_interface)
|
| 553 |
|
|
continue;
|
| 554 |
|
|
if (ipv6_addr_cmp(group, &pmc->addr) == 0)
|
| 555 |
|
|
break;
|
| 556 |
|
|
}
|
| 557 |
|
|
if (!pmc) /* must have a prior join */
|
| 558 |
|
|
goto done;
|
| 559 |
|
|
gsf->gf_fmode = pmc->sfmode;
|
| 560 |
|
|
psl = pmc->sflist;
|
| 561 |
|
|
count = psl ? psl->sl_count : 0;
|
| 562 |
|
|
read_unlock_bh(&idev->lock);
|
| 563 |
|
|
in6_dev_put(idev);
|
| 564 |
|
|
dev_put(dev);
|
| 565 |
|
|
|
| 566 |
|
|
copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
|
| 567 |
|
|
gsf->gf_numsrc = count;
|
| 568 |
|
|
if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
|
| 569 |
|
|
copy_to_user((void *)optval, gsf, GROUP_FILTER_SIZE(0))) {
|
| 570 |
|
|
return -EFAULT;
|
| 571 |
|
|
}
|
| 572 |
|
|
for (i=0; i<copycount; i++) {
|
| 573 |
|
|
struct sockaddr_in6 *psin6;
|
| 574 |
|
|
struct sockaddr_storage ss;
|
| 575 |
|
|
|
| 576 |
|
|
psin6 = (struct sockaddr_in6 *)&ss;
|
| 577 |
|
|
memset(&ss, 0, sizeof(ss));
|
| 578 |
|
|
psin6->sin6_family = AF_INET6;
|
| 579 |
|
|
psin6->sin6_addr = psl->sl_addr[i];
|
| 580 |
|
|
if (copy_to_user((void *)&optval->gf_slist[i], &ss, sizeof(ss)))
|
| 581 |
|
|
return -EFAULT;
|
| 582 |
|
|
}
|
| 583 |
|
|
return 0;
|
| 584 |
|
|
done:
|
| 585 |
|
|
read_unlock_bh(&idev->lock);
|
| 586 |
|
|
in6_dev_put(idev);
|
| 587 |
|
|
dev_put(dev);
|
| 588 |
|
|
return err;
|
| 589 |
|
|
}
|
| 590 |
|
|
|
| 591 |
|
|
int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
|
| 592 |
|
|
struct in6_addr *src_addr)
|
| 593 |
|
|
{
|
| 594 |
|
|
struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
|
| 595 |
|
|
struct ipv6_mc_socklist *mc;
|
| 596 |
|
|
struct ip6_sf_socklist *psl;
|
| 597 |
|
|
int rv = 1;
|
| 598 |
|
|
|
| 599 |
|
|
read_lock(&ipv6_sk_mc_lock);
|
| 600 |
|
|
for (mc = np->ipv6_mc_list; mc; mc = mc->next) {
|
| 601 |
|
|
if (ipv6_addr_cmp(&mc->addr, mc_addr) == 0)
|
| 602 |
|
|
break;
|
| 603 |
|
|
}
|
| 604 |
|
|
if (!mc) {
|
| 605 |
|
|
read_unlock(&ipv6_sk_mc_lock);
|
| 606 |
|
|
return 1;
|
| 607 |
|
|
}
|
| 608 |
|
|
psl = mc->sflist;
|
| 609 |
|
|
if (!psl) {
|
| 610 |
|
|
rv = mc->sfmode == MCAST_EXCLUDE;
|
| 611 |
|
|
} else {
|
| 612 |
|
|
int i;
|
| 613 |
|
|
|
| 614 |
|
|
for (i=0; i<psl->sl_count; i++) {
|
| 615 |
|
|
if (ipv6_addr_cmp(&psl->sl_addr[i], src_addr) == 0)
|
| 616 |
|
|
break;
|
| 617 |
|
|
}
|
| 618 |
|
|
if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
|
| 619 |
|
|
rv = 0;
|
| 620 |
|
|
if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
|
| 621 |
|
|
rv = 0;
|
| 622 |
|
|
}
|
| 623 |
|
|
read_unlock(&ipv6_sk_mc_lock);
|
| 624 |
|
|
|
| 625 |
|
|
return rv;
|
| 626 |
|
|
}
|
| 627 |
|
|
|
| 628 |
|
|
static void ma_put(struct ifmcaddr6 *mc)
|
| 629 |
|
|
{
|
| 630 |
|
|
if (atomic_dec_and_test(&mc->mca_refcnt)) {
|
| 631 |
|
|
in6_dev_put(mc->idev);
|
| 632 |
|
|
kfree(mc);
|
| 633 |
|
|
}
|
| 634 |
|
|
}
|
| 635 |
|
|
|
| 636 |
|
|
static void igmp6_group_added(struct ifmcaddr6 *mc)
|
| 637 |
|
|
{
|
| 638 |
|
|
struct net_device *dev = mc->idev->dev;
|
| 639 |
|
|
char buf[MAX_ADDR_LEN];
|
| 640 |
|
|
|
| 641 |
|
|
spin_lock_bh(&mc->mca_lock);
|
| 642 |
|
|
if (!(mc->mca_flags&MAF_LOADED)) {
|
| 643 |
|
|
mc->mca_flags |= MAF_LOADED;
|
| 644 |
|
|
if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
|
| 645 |
|
|
dev_mc_add(dev, buf, dev->addr_len, 0);
|
| 646 |
|
|
}
|
| 647 |
|
|
spin_unlock_bh(&mc->mca_lock);
|
| 648 |
|
|
|
| 649 |
|
|
if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
|
| 650 |
|
|
return;
|
| 651 |
|
|
|
| 652 |
|
|
if (MLD_V1_SEEN(mc->idev)) {
|
| 653 |
|
|
igmp6_join_group(mc);
|
| 654 |
|
|
return;
|
| 655 |
|
|
}
|
| 656 |
|
|
/* else v2 */
|
| 657 |
|
|
|
| 658 |
|
|
mc->mca_crcount = mc->idev->mc_qrv;
|
| 659 |
|
|
mld_ifc_event(mc->idev);
|
| 660 |
|
|
}
|
| 661 |
|
|
|
| 662 |
|
|
static void igmp6_group_dropped(struct ifmcaddr6 *mc)
|
| 663 |
|
|
{
|
| 664 |
|
|
struct net_device *dev = mc->idev->dev;
|
| 665 |
|
|
char buf[MAX_ADDR_LEN];
|
| 666 |
|
|
|
| 667 |
|
|
spin_lock_bh(&mc->mca_lock);
|
| 668 |
|
|
if (mc->mca_flags&MAF_LOADED) {
|
| 669 |
|
|
mc->mca_flags &= ~MAF_LOADED;
|
| 670 |
|
|
if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
|
| 671 |
|
|
dev_mc_delete(dev, buf, dev->addr_len, 0);
|
| 672 |
|
|
}
|
| 673 |
|
|
|
| 674 |
|
|
if (mc->mca_flags & MAF_NOREPORT)
|
| 675 |
|
|
goto done;
|
| 676 |
|
|
spin_unlock_bh(&mc->mca_lock);
|
| 677 |
|
|
|
| 678 |
|
|
if (!mc->idev->dead)
|
| 679 |
|
|
igmp6_leave_group(mc);
|
| 680 |
|
|
|
| 681 |
|
|
spin_lock_bh(&mc->mca_lock);
|
| 682 |
|
|
if (del_timer(&mc->mca_timer))
|
| 683 |
|
|
atomic_dec(&mc->mca_refcnt);
|
| 684 |
|
|
done:
|
| 685 |
|
|
ip6_mc_clear_src(mc);
|
| 686 |
|
|
spin_unlock_bh(&mc->mca_lock);
|
| 687 |
|
|
}
|
| 688 |
|
|
|
| 689 |
|
|
/*
|
| 690 |
|
|
* deleted ifmcaddr6 manipulation
|
| 691 |
|
|
*/
|
| 692 |
|
|
static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
|
| 693 |
|
|
{
|
| 694 |
|
|
struct ifmcaddr6 *pmc;
|
| 695 |
|
|
|
| 696 |
|
|
/* this is an "ifmcaddr6" for convenience; only the fields below
|
| 697 |
|
|
* are actually used. In particular, the refcnt and users are not
|
| 698 |
|
|
* used for management of the delete list. Using the same structure
|
| 699 |
|
|
* for deleted items allows change reports to use common code with
|
| 700 |
|
|
* non-deleted or query-response MCA's.
|
| 701 |
|
|
*/
|
| 702 |
|
|
pmc = (struct ifmcaddr6 *)kmalloc(sizeof(*pmc), GFP_ATOMIC);
|
| 703 |
|
|
if (!pmc)
|
| 704 |
|
|
return;
|
| 705 |
|
|
memset(pmc, 0, sizeof(*pmc));
|
| 706 |
|
|
spin_lock_bh(&im->mca_lock);
|
| 707 |
|
|
pmc->mca_lock = SPIN_LOCK_UNLOCKED;
|
| 708 |
|
|
pmc->idev = im->idev;
|
| 709 |
|
|
in6_dev_hold(idev);
|
| 710 |
|
|
pmc->mca_addr = im->mca_addr;
|
| 711 |
|
|
pmc->mca_crcount = idev->mc_qrv;
|
| 712 |
|
|
pmc->mca_sfmode = im->mca_sfmode;
|
| 713 |
|
|
if (pmc->mca_sfmode == MCAST_INCLUDE) {
|
| 714 |
|
|
struct ip6_sf_list *psf;
|
| 715 |
|
|
|
| 716 |
|
|
pmc->mca_tomb = im->mca_tomb;
|
| 717 |
|
|
pmc->mca_sources = im->mca_sources;
|
| 718 |
|
|
im->mca_tomb = im->mca_sources = 0;
|
| 719 |
|
|
for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
|
| 720 |
|
|
psf->sf_crcount = pmc->mca_crcount;
|
| 721 |
|
|
}
|
| 722 |
|
|
spin_unlock_bh(&im->mca_lock);
|
| 723 |
|
|
|
| 724 |
|
|
write_lock_bh(&idev->mc_lock);
|
| 725 |
|
|
pmc->next = idev->mc_tomb;
|
| 726 |
|
|
idev->mc_tomb = pmc;
|
| 727 |
|
|
write_unlock_bh(&idev->mc_lock);
|
| 728 |
|
|
}
|
| 729 |
|
|
|
| 730 |
|
|
static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca)
|
| 731 |
|
|
{
|
| 732 |
|
|
struct ifmcaddr6 *pmc, *pmc_prev;
|
| 733 |
|
|
struct ip6_sf_list *psf, *psf_next;
|
| 734 |
|
|
|
| 735 |
|
|
write_lock_bh(&idev->mc_lock);
|
| 736 |
|
|
pmc_prev = 0;
|
| 737 |
|
|
for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
|
| 738 |
|
|
if (ipv6_addr_cmp(&pmc->mca_addr, pmca) == 0)
|
| 739 |
|
|
break;
|
| 740 |
|
|
pmc_prev = pmc;
|
| 741 |
|
|
}
|
| 742 |
|
|
if (pmc) {
|
| 743 |
|
|
if (pmc_prev)
|
| 744 |
|
|
pmc_prev->next = pmc->next;
|
| 745 |
|
|
else
|
| 746 |
|
|
idev->mc_tomb = pmc->next;
|
| 747 |
|
|
}
|
| 748 |
|
|
write_unlock_bh(&idev->mc_lock);
|
| 749 |
|
|
if (pmc) {
|
| 750 |
|
|
for (psf=pmc->mca_tomb; psf; psf=psf_next) {
|
| 751 |
|
|
psf_next = psf->sf_next;
|
| 752 |
|
|
kfree(psf);
|
| 753 |
|
|
}
|
| 754 |
|
|
in6_dev_put(pmc->idev);
|
| 755 |
|
|
kfree(pmc);
|
| 756 |
|
|
}
|
| 757 |
|
|
}
|
| 758 |
|
|
|
| 759 |
|
|
static void mld_clear_delrec(struct inet6_dev *idev)
|
| 760 |
|
|
{
|
| 761 |
|
|
struct ifmcaddr6 *pmc, *nextpmc;
|
| 762 |
|
|
|
| 763 |
|
|
write_lock_bh(&idev->mc_lock);
|
| 764 |
|
|
pmc = idev->mc_tomb;
|
| 765 |
|
|
idev->mc_tomb = 0;
|
| 766 |
|
|
write_unlock_bh(&idev->mc_lock);
|
| 767 |
|
|
|
| 768 |
|
|
for (; pmc; pmc = nextpmc) {
|
| 769 |
|
|
nextpmc = pmc->next;
|
| 770 |
|
|
ip6_mc_clear_src(pmc);
|
| 771 |
|
|
in6_dev_put(pmc->idev);
|
| 772 |
|
|
kfree(pmc);
|
| 773 |
|
|
}
|
| 774 |
|
|
|
| 775 |
|
|
/* clear dead sources, too */
|
| 776 |
|
|
read_lock_bh(&idev->lock);
|
| 777 |
|
|
for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
|
| 778 |
|
|
struct ip6_sf_list *psf, *psf_next;
|
| 779 |
|
|
|
| 780 |
|
|
spin_lock_bh(&pmc->mca_lock);
|
| 781 |
|
|
psf = pmc->mca_tomb;
|
| 782 |
|
|
pmc->mca_tomb = 0;
|
| 783 |
|
|
spin_unlock_bh(&pmc->mca_lock);
|
| 784 |
|
|
for (; psf; psf=psf_next) {
|
| 785 |
|
|
psf_next = psf->sf_next;
|
| 786 |
|
|
kfree(psf);
|
| 787 |
|
|
}
|
| 788 |
|
|
}
|
| 789 |
|
|
read_unlock_bh(&idev->lock);
|
| 790 |
|
|
}
|
| 791 |
|
|
|
| 792 |
|
|
|
| 793 |
|
|
/*
|
| 794 |
|
|
* device multicast group inc (add if not found)
|
| 795 |
|
|
*/
|
| 796 |
|
|
int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr)
|
| 797 |
|
|
{
|
| 798 |
|
|
struct ifmcaddr6 *mc;
|
| 799 |
|
|
struct inet6_dev *idev;
|
| 800 |
|
|
|
| 801 |
|
|
idev = in6_dev_get(dev);
|
| 802 |
|
|
|
| 803 |
|
|
if (idev == NULL)
|
| 804 |
|
|
return -EINVAL;
|
| 805 |
|
|
|
| 806 |
|
|
write_lock_bh(&idev->lock);
|
| 807 |
|
|
if (idev->dead) {
|
| 808 |
|
|
write_unlock_bh(&idev->lock);
|
| 809 |
|
|
in6_dev_put(idev);
|
| 810 |
|
|
return -ENODEV;
|
| 811 |
|
|
}
|
| 812 |
|
|
|
| 813 |
|
|
for (mc = idev->mc_list; mc; mc = mc->next) {
|
| 814 |
|
|
if (ipv6_addr_cmp(&mc->mca_addr, addr) == 0) {
|
| 815 |
|
|
mc->mca_users++;
|
| 816 |
|
|
write_unlock_bh(&idev->lock);
|
| 817 |
|
|
ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
|
| 818 |
|
|
0, 0);
|
| 819 |
|
|
in6_dev_put(idev);
|
| 820 |
|
|
return 0;
|
| 821 |
|
|
}
|
| 822 |
|
|
}
|
| 823 |
|
|
|
| 824 |
|
|
/*
|
| 825 |
|
|
* not found: create a new one.
|
| 826 |
|
|
*/
|
| 827 |
|
|
|
| 828 |
|
|
mc = kmalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
|
| 829 |
|
|
|
| 830 |
|
|
if (mc == NULL) {
|
| 831 |
|
|
write_unlock_bh(&idev->lock);
|
| 832 |
|
|
in6_dev_put(idev);
|
| 833 |
|
|
return -ENOMEM;
|
| 834 |
|
|
}
|
| 835 |
|
|
|
| 836 |
|
|
memset(mc, 0, sizeof(struct ifmcaddr6));
|
| 837 |
|
|
mc->mca_timer.function = igmp6_timer_handler;
|
| 838 |
|
|
mc->mca_timer.data = (unsigned long) mc;
|
| 839 |
|
|
|
| 840 |
|
|
memcpy(&mc->mca_addr, addr, sizeof(struct in6_addr));
|
| 841 |
|
|
mc->idev = idev;
|
| 842 |
|
|
mc->mca_users = 1;
|
| 843 |
|
|
atomic_set(&mc->mca_refcnt, 2);
|
| 844 |
|
|
mc->mca_lock = SPIN_LOCK_UNLOCKED;
|
| 845 |
|
|
|
| 846 |
|
|
/* initial mode is (EX, empty) */
|
| 847 |
|
|
mc->mca_sfmode = MCAST_EXCLUDE;
|
| 848 |
|
|
mc->mca_sfcount[MCAST_EXCLUDE] = 1;
|
| 849 |
|
|
|
| 850 |
|
|
if (ipv6_addr_cmp(&mc->mca_addr, &all_nodes_addr) == 0 ||
|
| 851 |
|
|
IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
|
| 852 |
|
|
mc->mca_flags |= MAF_NOREPORT;
|
| 853 |
|
|
|
| 854 |
|
|
mc->next = idev->mc_list;
|
| 855 |
|
|
idev->mc_list = mc;
|
| 856 |
|
|
write_unlock_bh(&idev->lock);
|
| 857 |
|
|
|
| 858 |
|
|
mld_del_delrec(idev, &mc->mca_addr);
|
| 859 |
|
|
igmp6_group_added(mc);
|
| 860 |
|
|
ma_put(mc);
|
| 861 |
|
|
return 0;
|
| 862 |
|
|
}
|
| 863 |
|
|
|
| 864 |
|
|
/*
|
| 865 |
|
|
* device multicast group del
|
| 866 |
|
|
*/
|
| 867 |
|
|
static int __ipv6_dev_mc_dec(struct net_device *dev, struct inet6_dev *idev, struct in6_addr *addr)
|
| 868 |
|
|
{
|
| 869 |
|
|
struct ifmcaddr6 *ma, **map;
|
| 870 |
|
|
|
| 871 |
|
|
write_lock_bh(&idev->lock);
|
| 872 |
|
|
for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
|
| 873 |
|
|
if (ipv6_addr_cmp(&ma->mca_addr, addr) == 0) {
|
| 874 |
|
|
if (--ma->mca_users == 0) {
|
| 875 |
|
|
*map = ma->next;
|
| 876 |
|
|
write_unlock_bh(&idev->lock);
|
| 877 |
|
|
|
| 878 |
|
|
igmp6_group_dropped(ma);
|
| 879 |
|
|
|
| 880 |
|
|
ma_put(ma);
|
| 881 |
|
|
return 0;
|
| 882 |
|
|
}
|
| 883 |
|
|
write_unlock_bh(&idev->lock);
|
| 884 |
|
|
return 0;
|
| 885 |
|
|
}
|
| 886 |
|
|
}
|
| 887 |
|
|
write_unlock_bh(&idev->lock);
|
| 888 |
|
|
|
| 889 |
|
|
return -ENOENT;
|
| 890 |
|
|
}
|
| 891 |
|
|
|
| 892 |
|
|
int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr)
|
| 893 |
|
|
{
|
| 894 |
|
|
struct inet6_dev *idev = in6_dev_get(dev);
|
| 895 |
|
|
int err;
|
| 896 |
|
|
|
| 897 |
|
|
if (!idev)
|
| 898 |
|
|
return -ENODEV;
|
| 899 |
|
|
|
| 900 |
|
|
err = __ipv6_dev_mc_dec(dev, idev, addr);
|
| 901 |
|
|
|
| 902 |
|
|
in6_dev_put(idev);
|
| 903 |
|
|
|
| 904 |
|
|
return err;
|
| 905 |
|
|
}
|
| 906 |
|
|
|
| 907 |
|
|
/*
|
| 908 |
|
|
* check if the interface/address pair is valid
|
| 909 |
|
|
*/
|
| 910 |
|
|
int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
|
| 911 |
|
|
struct in6_addr *src_addr)
|
| 912 |
|
|
{
|
| 913 |
|
|
struct inet6_dev *idev;
|
| 914 |
|
|
struct ifmcaddr6 *mc;
|
| 915 |
|
|
int rv = 0;
|
| 916 |
|
|
|
| 917 |
|
|
idev = in6_dev_get(dev);
|
| 918 |
|
|
if (idev) {
|
| 919 |
|
|
read_lock_bh(&idev->lock);
|
| 920 |
|
|
for (mc = idev->mc_list; mc; mc=mc->next) {
|
| 921 |
|
|
if (ipv6_addr_cmp(&mc->mca_addr, group) == 0)
|
| 922 |
|
|
break;
|
| 923 |
|
|
}
|
| 924 |
|
|
if (mc) {
|
| 925 |
|
|
if (!ipv6_addr_any(src_addr)) {
|
| 926 |
|
|
struct ip6_sf_list *psf;
|
| 927 |
|
|
|
| 928 |
|
|
spin_lock_bh(&mc->mca_lock);
|
| 929 |
|
|
for (psf=mc->mca_sources;psf;psf=psf->sf_next) {
|
| 930 |
|
|
if (ipv6_addr_cmp(&psf->sf_addr,
|
| 931 |
|
|
src_addr) == 0)
|
| 932 |
|
|
break;
|
| 933 |
|
|
}
|
| 934 |
|
|
if (psf)
|
| 935 |
|
|
rv = psf->sf_count[MCAST_INCLUDE] ||
|
| 936 |
|
|
psf->sf_count[MCAST_EXCLUDE] !=
|
| 937 |
|
|
mc->mca_sfcount[MCAST_EXCLUDE];
|
| 938 |
|
|
else
|
| 939 |
|
|
rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0;
|
| 940 |
|
|
spin_unlock_bh(&mc->mca_lock);
|
| 941 |
|
|
} else
|
| 942 |
|
|
rv = 1; /* don't filter unspecified source */
|
| 943 |
|
|
}
|
| 944 |
|
|
read_unlock_bh(&idev->lock);
|
| 945 |
|
|
in6_dev_put(idev);
|
| 946 |
|
|
}
|
| 947 |
|
|
return rv;
|
| 948 |
|
|
}
|
| 949 |
|
|
|
| 950 |
|
|
static void mld_gq_start_timer(struct inet6_dev *idev)
|
| 951 |
|
|
{
|
| 952 |
|
|
int tv = net_random() % idev->mc_maxdelay;
|
| 953 |
|
|
|
| 954 |
|
|
idev->mc_gq_running = 1;
|
| 955 |
|
|
if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
|
| 956 |
|
|
in6_dev_hold(idev);
|
| 957 |
|
|
}
|
| 958 |
|
|
|
| 959 |
|
|
static void mld_ifc_start_timer(struct inet6_dev *idev, int delay)
|
| 960 |
|
|
{
|
| 961 |
|
|
int tv = net_random() % delay;
|
| 962 |
|
|
|
| 963 |
|
|
if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
|
| 964 |
|
|
in6_dev_hold(idev);
|
| 965 |
|
|
}
|
| 966 |
|
|
|
| 967 |
|
|
/*
|
| 968 |
|
|
* IGMP handling (alias multicast ICMPv6 messages)
|
| 969 |
|
|
*/
|
| 970 |
|
|
|
| 971 |
|
|
static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
|
| 972 |
|
|
{
|
| 973 |
|
|
unsigned long delay = resptime;
|
| 974 |
|
|
|
| 975 |
|
|
/* Do not start timer for these addresses */
|
| 976 |
|
|
if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
|
| 977 |
|
|
IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
|
| 978 |
|
|
return;
|
| 979 |
|
|
|
| 980 |
|
|
if (del_timer(&ma->mca_timer)) {
|
| 981 |
|
|
atomic_dec(&ma->mca_refcnt);
|
| 982 |
|
|
delay = ma->mca_timer.expires - jiffies;
|
| 983 |
|
|
}
|
| 984 |
|
|
|
| 985 |
|
|
if (delay >= resptime) {
|
| 986 |
|
|
if (resptime)
|
| 987 |
|
|
delay = net_random() % resptime;
|
| 988 |
|
|
else
|
| 989 |
|
|
delay = 1;
|
| 990 |
|
|
}
|
| 991 |
|
|
|
| 992 |
|
|
ma->mca_timer.expires = jiffies + delay;
|
| 993 |
|
|
if (!mod_timer(&ma->mca_timer, jiffies + delay))
|
| 994 |
|
|
atomic_inc(&ma->mca_refcnt);
|
| 995 |
|
|
ma->mca_flags |= MAF_TIMER_RUNNING;
|
| 996 |
|
|
spin_unlock(&ma->mca_lock);
|
| 997 |
|
|
}
|
| 998 |
|
|
|
| 999 |
|
|
static void mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
|
| 1000 |
|
|
struct in6_addr *srcs)
|
| 1001 |
|
|
{
|
| 1002 |
|
|
struct ip6_sf_list *psf;
|
| 1003 |
|
|
int i, scount;
|
| 1004 |
|
|
|
| 1005 |
|
|
scount = 0;
|
| 1006 |
|
|
for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
|
| 1007 |
|
|
if (scount == nsrcs)
|
| 1008 |
|
|
break;
|
| 1009 |
|
|
for (i=0; i<nsrcs; i++)
|
| 1010 |
|
|
if (ipv6_addr_cmp(&srcs[i], &psf->sf_addr) == 0) {
|
| 1011 |
|
|
psf->sf_gsresp = 1;
|
| 1012 |
|
|
scount++;
|
| 1013 |
|
|
break;
|
| 1014 |
|
|
}
|
| 1015 |
|
|
}
|
| 1016 |
|
|
}
|
| 1017 |
|
|
|
| 1018 |
|
|
int igmp6_event_query(struct sk_buff *skb)
|
| 1019 |
|
|
{
|
| 1020 |
|
|
struct mld2_query *mlh2 = (struct mld2_query *) skb->h.raw;
|
| 1021 |
|
|
struct ifmcaddr6 *ma;
|
| 1022 |
|
|
struct in6_addr *group;
|
| 1023 |
|
|
unsigned long max_delay;
|
| 1024 |
|
|
struct inet6_dev *idev;
|
| 1025 |
|
|
struct icmp6hdr *hdr;
|
| 1026 |
|
|
int group_type;
|
| 1027 |
|
|
int mark = 0;
|
| 1028 |
|
|
int len;
|
| 1029 |
|
|
|
| 1030 |
|
|
if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
|
| 1031 |
|
|
return -EINVAL;
|
| 1032 |
|
|
|
| 1033 |
|
|
len = ntohs(skb->nh.ipv6h->payload_len);
|
| 1034 |
|
|
|
| 1035 |
|
|
/* Drop queries with not link local source */
|
| 1036 |
|
|
if (!(ipv6_addr_type(&skb->nh.ipv6h->saddr)&IPV6_ADDR_LINKLOCAL))
|
| 1037 |
|
|
return -EINVAL;
|
| 1038 |
|
|
|
| 1039 |
|
|
idev = in6_dev_get(skb->dev);
|
| 1040 |
|
|
|
| 1041 |
|
|
if (idev == NULL)
|
| 1042 |
|
|
return 0;
|
| 1043 |
|
|
|
| 1044 |
|
|
hdr = (struct icmp6hdr *) skb->h.raw;
|
| 1045 |
|
|
group = (struct in6_addr *) (hdr + 1);
|
| 1046 |
|
|
group_type = ipv6_addr_type(group);
|
| 1047 |
|
|
|
| 1048 |
|
|
if (group_type != IPV6_ADDR_ANY &&
|
| 1049 |
|
|
!(group_type&IPV6_ADDR_MULTICAST)) {
|
| 1050 |
|
|
in6_dev_put(idev);
|
| 1051 |
|
|
return -EINVAL;
|
| 1052 |
|
|
}
|
| 1053 |
|
|
|
| 1054 |
|
|
if (len == 24) {
|
| 1055 |
|
|
int switchback;
|
| 1056 |
|
|
/* MLDv1 router present */
|
| 1057 |
|
|
|
| 1058 |
|
|
/* Translate milliseconds to jiffies */
|
| 1059 |
|
|
max_delay = (ntohs(hdr->icmp6_maxdelay)*HZ)/1000;
|
| 1060 |
|
|
|
| 1061 |
|
|
switchback = (idev->mc_qrv + 1) * max_delay;
|
| 1062 |
|
|
idev->mc_v1_seen = jiffies + switchback;
|
| 1063 |
|
|
|
| 1064 |
|
|
/* cancel the interface change timer */
|
| 1065 |
|
|
idev->mc_ifc_count = 0;
|
| 1066 |
|
|
if (del_timer(&idev->mc_ifc_timer))
|
| 1067 |
|
|
__in6_dev_put(idev);
|
| 1068 |
|
|
/* clear deleted report items */
|
| 1069 |
|
|
mld_clear_delrec(idev);
|
| 1070 |
|
|
} else if (len >= 28) {
|
| 1071 |
|
|
max_delay = (MLDV2_MRC(ntohs(mlh2->mrc))*HZ)/1000;
|
| 1072 |
|
|
if (!max_delay)
|
| 1073 |
|
|
max_delay = 1;
|
| 1074 |
|
|
idev->mc_maxdelay = max_delay;
|
| 1075 |
|
|
if (mlh2->qrv)
|
| 1076 |
|
|
idev->mc_qrv = mlh2->qrv;
|
| 1077 |
|
|
if (group_type == IPV6_ADDR_ANY) { /* general query */
|
| 1078 |
|
|
if (mlh2->nsrcs) {
|
| 1079 |
|
|
in6_dev_put(idev);
|
| 1080 |
|
|
return -EINVAL; /* no sources allowed */
|
| 1081 |
|
|
}
|
| 1082 |
|
|
mld_gq_start_timer(idev);
|
| 1083 |
|
|
in6_dev_put(idev);
|
| 1084 |
|
|
return 0;
|
| 1085 |
|
|
}
|
| 1086 |
|
|
/* mark sources to include, if group & source-specific */
|
| 1087 |
|
|
mark = mlh2->nsrcs != 0;
|
| 1088 |
|
|
} else {
|
| 1089 |
|
|
in6_dev_put(idev);
|
| 1090 |
|
|
return -EINVAL;
|
| 1091 |
|
|
}
|
| 1092 |
|
|
|
| 1093 |
|
|
read_lock_bh(&idev->lock);
|
| 1094 |
|
|
if (group_type == IPV6_ADDR_ANY) {
|
| 1095 |
|
|
for (ma = idev->mc_list; ma; ma=ma->next) {
|
| 1096 |
|
|
spin_lock_bh(&ma->mca_lock);
|
| 1097 |
|
|
igmp6_group_queried(ma, max_delay);
|
| 1098 |
|
|
spin_unlock_bh(&ma->mca_lock);
|
| 1099 |
|
|
}
|
| 1100 |
|
|
} else {
|
| 1101 |
|
|
for (ma = idev->mc_list; ma; ma=ma->next) {
|
| 1102 |
|
|
if (group_type != IPV6_ADDR_ANY &&
|
| 1103 |
|
|
ipv6_addr_cmp(group, &ma->mca_addr) != 0)
|
| 1104 |
|
|
continue;
|
| 1105 |
|
|
spin_lock_bh(&ma->mca_lock);
|
| 1106 |
|
|
if (ma->mca_flags & MAF_TIMER_RUNNING) {
|
| 1107 |
|
|
/* gsquery <- gsquery && mark */
|
| 1108 |
|
|
if (!mark)
|
| 1109 |
|
|
ma->mca_flags &= ~MAF_GSQUERY;
|
| 1110 |
|
|
} else {
|
| 1111 |
|
|
/* gsquery <- mark */
|
| 1112 |
|
|
if (mark)
|
| 1113 |
|
|
ma->mca_flags |= MAF_GSQUERY;
|
| 1114 |
|
|
else
|
| 1115 |
|
|
ma->mca_flags &= ~MAF_GSQUERY;
|
| 1116 |
|
|
}
|
| 1117 |
|
|
if (ma->mca_flags & MAF_GSQUERY)
|
| 1118 |
|
|
mld_marksources(ma, ntohs(mlh2->nsrcs),
|
| 1119 |
|
|
mlh2->srcs);
|
| 1120 |
|
|
igmp6_group_queried(ma, max_delay);
|
| 1121 |
|
|
spin_unlock_bh(&ma->mca_lock);
|
| 1122 |
|
|
if (group_type != IPV6_ADDR_ANY)
|
| 1123 |
|
|
break;
|
| 1124 |
|
|
}
|
| 1125 |
|
|
}
|
| 1126 |
|
|
read_unlock_bh(&idev->lock);
|
| 1127 |
|
|
in6_dev_put(idev);
|
| 1128 |
|
|
|
| 1129 |
|
|
return 0;
|
| 1130 |
|
|
}
|
| 1131 |
|
|
|
| 1132 |
|
|
|
| 1133 |
|
|
int igmp6_event_report(struct sk_buff *skb)
|
| 1134 |
|
|
{
|
| 1135 |
|
|
struct ifmcaddr6 *ma;
|
| 1136 |
|
|
struct in6_addr *addrp;
|
| 1137 |
|
|
struct inet6_dev *idev;
|
| 1138 |
|
|
struct icmp6hdr *hdr;
|
| 1139 |
|
|
int addr_type;
|
| 1140 |
|
|
|
| 1141 |
|
|
/* Our own report looped back. Ignore it. */
|
| 1142 |
|
|
if (skb->pkt_type == PACKET_LOOPBACK)
|
| 1143 |
|
|
return 0;
|
| 1144 |
|
|
|
| 1145 |
|
|
if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
|
| 1146 |
|
|
return -EINVAL;
|
| 1147 |
|
|
|
| 1148 |
|
|
hdr = (struct icmp6hdr*) skb->h.raw;
|
| 1149 |
|
|
|
| 1150 |
|
|
/* Drop reports with not link local source */
|
| 1151 |
|
|
addr_type = ipv6_addr_type(&skb->nh.ipv6h->saddr);
|
| 1152 |
|
|
if (addr_type != IPV6_ADDR_ANY &&
|
| 1153 |
|
|
!(addr_type&IPV6_ADDR_LINKLOCAL))
|
| 1154 |
|
|
return -EINVAL;
|
| 1155 |
|
|
|
| 1156 |
|
|
addrp = (struct in6_addr *) (hdr + 1);
|
| 1157 |
|
|
|
| 1158 |
|
|
idev = in6_dev_get(skb->dev);
|
| 1159 |
|
|
if (idev == NULL)
|
| 1160 |
|
|
return -ENODEV;
|
| 1161 |
|
|
|
| 1162 |
|
|
/*
|
| 1163 |
|
|
* Cancel the timer for this group
|
| 1164 |
|
|
*/
|
| 1165 |
|
|
|
| 1166 |
|
|
read_lock_bh(&idev->lock);
|
| 1167 |
|
|
for (ma = idev->mc_list; ma; ma=ma->next) {
|
| 1168 |
|
|
if (ipv6_addr_cmp(&ma->mca_addr, addrp) == 0) {
|
| 1169 |
|
|
spin_lock(&ma->mca_lock);
|
| 1170 |
|
|
if (del_timer(&ma->mca_timer))
|
| 1171 |
|
|
atomic_dec(&ma->mca_refcnt);
|
| 1172 |
|
|
ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
|
| 1173 |
|
|
spin_unlock(&ma->mca_lock);
|
| 1174 |
|
|
break;
|
| 1175 |
|
|
}
|
| 1176 |
|
|
}
|
| 1177 |
|
|
read_unlock_bh(&idev->lock);
|
| 1178 |
|
|
in6_dev_put(idev);
|
| 1179 |
|
|
return 0;
|
| 1180 |
|
|
}
|
| 1181 |
|
|
|
| 1182 |
|
|
static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
|
| 1183 |
|
|
int gdeleted, int sdeleted)
|
| 1184 |
|
|
{
|
| 1185 |
|
|
switch (type) {
|
| 1186 |
|
|
case MLD2_MODE_IS_INCLUDE:
|
| 1187 |
|
|
case MLD2_MODE_IS_EXCLUDE:
|
| 1188 |
|
|
if (gdeleted || sdeleted)
|
| 1189 |
|
|
return 0;
|
| 1190 |
|
|
return !((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp);
|
| 1191 |
|
|
case MLD2_CHANGE_TO_INCLUDE:
|
| 1192 |
|
|
if (gdeleted || sdeleted)
|
| 1193 |
|
|
return 0;
|
| 1194 |
|
|
return psf->sf_count[MCAST_INCLUDE] != 0;
|
| 1195 |
|
|
case MLD2_CHANGE_TO_EXCLUDE:
|
| 1196 |
|
|
if (gdeleted || sdeleted)
|
| 1197 |
|
|
return 0;
|
| 1198 |
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
|
| 1199 |
|
|
psf->sf_count[MCAST_INCLUDE])
|
| 1200 |
|
|
return 0;
|
| 1201 |
|
|
return pmc->mca_sfcount[MCAST_EXCLUDE] ==
|
| 1202 |
|
|
psf->sf_count[MCAST_EXCLUDE];
|
| 1203 |
|
|
case MLD2_ALLOW_NEW_SOURCES:
|
| 1204 |
|
|
if (gdeleted || !psf->sf_crcount)
|
| 1205 |
|
|
return 0;
|
| 1206 |
|
|
return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
|
| 1207 |
|
|
case MLD2_BLOCK_OLD_SOURCES:
|
| 1208 |
|
|
if (pmc->mca_sfmode == MCAST_INCLUDE)
|
| 1209 |
|
|
return gdeleted || (psf->sf_crcount && sdeleted);
|
| 1210 |
|
|
return psf->sf_crcount && !gdeleted && !sdeleted;
|
| 1211 |
|
|
}
|
| 1212 |
|
|
return 0;
|
| 1213 |
|
|
}
|
| 1214 |
|
|
|
| 1215 |
|
|
static int
|
| 1216 |
|
|
mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
|
| 1217 |
|
|
{
|
| 1218 |
|
|
struct ip6_sf_list *psf;
|
| 1219 |
|
|
int scount = 0;
|
| 1220 |
|
|
|
| 1221 |
|
|
for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
|
| 1222 |
|
|
if (!is_in(pmc, psf, type, gdeleted, sdeleted))
|
| 1223 |
|
|
continue;
|
| 1224 |
|
|
scount++;
|
| 1225 |
|
|
}
|
| 1226 |
|
|
return scount;
|
| 1227 |
|
|
}
|
| 1228 |
|
|
|
| 1229 |
|
|
static struct sk_buff *mld_newpack(struct net_device *dev, int size)
|
| 1230 |
|
|
{
|
| 1231 |
|
|
struct sock *sk = igmp6_socket->sk;
|
| 1232 |
|
|
struct sk_buff *skb;
|
| 1233 |
|
|
struct mld2_report *pmr;
|
| 1234 |
|
|
struct in6_addr addr_buf;
|
| 1235 |
|
|
int err;
|
| 1236 |
|
|
u8 ra[8] = { IPPROTO_ICMPV6, 0,
|
| 1237 |
|
|
IPV6_TLV_ROUTERALERT, 2, 0, 0,
|
| 1238 |
|
|
IPV6_TLV_PADN, 0 };
|
| 1239 |
|
|
|
| 1240 |
|
|
skb = sock_alloc_send_skb(sk, size + dev->hard_header_len+15, 1, &err);
|
| 1241 |
|
|
|
| 1242 |
|
|
if (skb == 0)
|
| 1243 |
|
|
return 0;
|
| 1244 |
|
|
|
| 1245 |
|
|
skb_reserve(skb, (dev->hard_header_len + 15) & ~15);
|
| 1246 |
|
|
if (dev->hard_header) {
|
| 1247 |
|
|
unsigned char ha[MAX_ADDR_LEN];
|
| 1248 |
|
|
|
| 1249 |
|
|
ndisc_mc_map(&mld2_all_mcr, ha, dev, 1);
|
| 1250 |
|
|
if (dev->hard_header(skb, dev, ETH_P_IPV6,ha,NULL,size) < 0) {
|
| 1251 |
|
|
kfree_skb(skb);
|
| 1252 |
|
|
return 0;
|
| 1253 |
|
|
}
|
| 1254 |
|
|
}
|
| 1255 |
|
|
|
| 1256 |
|
|
if (ipv6_get_lladdr(dev, &addr_buf)) {
|
| 1257 |
|
|
/* <draft-ietf-magma-mld-source-02.txt>:
|
| 1258 |
|
|
* use unspecified address as the source address
|
| 1259 |
|
|
* when a valid link-local address is not available.
|
| 1260 |
|
|
*/
|
| 1261 |
|
|
memset(&addr_buf, 0, sizeof(addr_buf));
|
| 1262 |
|
|
}
|
| 1263 |
|
|
|
| 1264 |
|
|
ip6_nd_hdr(sk, skb, dev, &addr_buf, &mld2_all_mcr, NEXTHDR_HOP, 0);
|
| 1265 |
|
|
|
| 1266 |
|
|
memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
|
| 1267 |
|
|
|
| 1268 |
|
|
pmr =(struct mld2_report *)skb_put(skb, sizeof(*pmr));
|
| 1269 |
|
|
skb->h.raw = (unsigned char *)pmr;
|
| 1270 |
|
|
pmr->type = ICMPV6_MLD2_REPORT;
|
| 1271 |
|
|
pmr->resv1 = 0;
|
| 1272 |
|
|
pmr->csum = 0;
|
| 1273 |
|
|
pmr->resv2 = 0;
|
| 1274 |
|
|
pmr->ngrec = 0;
|
| 1275 |
|
|
return skb;
|
| 1276 |
|
|
}
|
| 1277 |
|
|
|
| 1278 |
|
|
static void mld_sendpack(struct sk_buff *skb)
|
| 1279 |
|
|
{
|
| 1280 |
|
|
struct ipv6hdr *pip6 = skb->nh.ipv6h;
|
| 1281 |
|
|
struct mld2_report *pmr = (struct mld2_report *)skb->h.raw;
|
| 1282 |
|
|
int payload_len, mldlen, err;
|
| 1283 |
|
|
|
| 1284 |
|
|
payload_len = skb->tail - (unsigned char *)skb->nh.ipv6h -
|
| 1285 |
|
|
sizeof(struct ipv6hdr);
|
| 1286 |
|
|
mldlen = skb->tail - skb->h.raw;
|
| 1287 |
|
|
pip6->payload_len = htons(payload_len);
|
| 1288 |
|
|
|
| 1289 |
|
|
pmr->csum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
|
| 1290 |
|
|
IPPROTO_ICMPV6, csum_partial(skb->h.raw, mldlen, 0));
|
| 1291 |
|
|
err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dev,
|
| 1292 |
|
|
dev_queue_xmit);
|
| 1293 |
|
|
if (!err)
|
| 1294 |
|
|
ICMP6_INC_STATS(Icmp6OutMsgs);
|
| 1295 |
|
|
}
|
| 1296 |
|
|
|
| 1297 |
|
|
static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
|
| 1298 |
|
|
{
|
| 1299 |
|
|
return sizeof(struct mld2_grec) + 4*mld_scount(pmc,type,gdel,sdel);
|
| 1300 |
|
|
}
|
| 1301 |
|
|
|
| 1302 |
|
|
static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
|
| 1303 |
|
|
int type, struct mld2_grec **ppgr)
|
| 1304 |
|
|
{
|
| 1305 |
|
|
struct net_device *dev = pmc->idev->dev;
|
| 1306 |
|
|
struct mld2_report *pmr;
|
| 1307 |
|
|
struct mld2_grec *pgr;
|
| 1308 |
|
|
|
| 1309 |
|
|
if (!skb)
|
| 1310 |
|
|
skb = mld_newpack(dev, dev->mtu);
|
| 1311 |
|
|
if (!skb)
|
| 1312 |
|
|
return 0;
|
| 1313 |
|
|
pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
|
| 1314 |
|
|
pgr->grec_type = type;
|
| 1315 |
|
|
pgr->grec_auxwords = 0;
|
| 1316 |
|
|
pgr->grec_nsrcs = 0;
|
| 1317 |
|
|
pgr->grec_mca = pmc->mca_addr; /* structure copy */
|
| 1318 |
|
|
pmr = (struct mld2_report *)skb->h.raw;
|
| 1319 |
|
|
pmr->ngrec = htons(ntohs(pmr->ngrec)+1);
|
| 1320 |
|
|
*ppgr = pgr;
|
| 1321 |
|
|
return skb;
|
| 1322 |
|
|
}
|
| 1323 |
|
|
|
| 1324 |
|
|
#define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
|
| 1325 |
|
|
skb_tailroom(skb)) : 0)
|
| 1326 |
|
|
|
| 1327 |
|
|
static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
|
| 1328 |
|
|
int type, int gdeleted, int sdeleted)
|
| 1329 |
|
|
{
|
| 1330 |
|
|
struct net_device *dev = pmc->idev->dev;
|
| 1331 |
|
|
struct mld2_report *pmr;
|
| 1332 |
|
|
struct mld2_grec *pgr = 0;
|
| 1333 |
|
|
struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
|
| 1334 |
|
|
int scount, first, isquery, truncate;
|
| 1335 |
|
|
|
| 1336 |
|
|
if (pmc->mca_flags & MAF_NOREPORT)
|
| 1337 |
|
|
return skb;
|
| 1338 |
|
|
|
| 1339 |
|
|
isquery = type == MLD2_MODE_IS_INCLUDE ||
|
| 1340 |
|
|
type == MLD2_MODE_IS_EXCLUDE;
|
| 1341 |
|
|
truncate = type == MLD2_MODE_IS_EXCLUDE ||
|
| 1342 |
|
|
type == MLD2_CHANGE_TO_EXCLUDE;
|
| 1343 |
|
|
|
| 1344 |
|
|
psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
|
| 1345 |
|
|
|
| 1346 |
|
|
if (!*psf_list) {
|
| 1347 |
|
|
if (type == MLD2_ALLOW_NEW_SOURCES ||
|
| 1348 |
|
|
type == MLD2_BLOCK_OLD_SOURCES)
|
| 1349 |
|
|
return skb;
|
| 1350 |
|
|
if (pmc->mca_crcount || isquery) {
|
| 1351 |
|
|
/* make sure we have room for group header and at
|
| 1352 |
|
|
* least one source.
|
| 1353 |
|
|
*/
|
| 1354 |
|
|
if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)+
|
| 1355 |
|
|
sizeof(struct in6_addr)) {
|
| 1356 |
|
|
mld_sendpack(skb);
|
| 1357 |
|
|
skb = 0; /* add_grhead will get a new one */
|
| 1358 |
|
|
}
|
| 1359 |
|
|
skb = add_grhead(skb, pmc, type, &pgr);
|
| 1360 |
|
|
}
|
| 1361 |
|
|
return skb;
|
| 1362 |
|
|
}
|
| 1363 |
|
|
pmr = skb ? (struct mld2_report *)skb->h.raw : 0;
|
| 1364 |
|
|
|
| 1365 |
|
|
/* EX and TO_EX get a fresh packet, if needed */
|
| 1366 |
|
|
if (truncate) {
|
| 1367 |
|
|
if (pmr && pmr->ngrec &&
|
| 1368 |
|
|
AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
|
| 1369 |
|
|
if (skb)
|
| 1370 |
|
|
mld_sendpack(skb);
|
| 1371 |
|
|
skb = mld_newpack(dev, dev->mtu);
|
| 1372 |
|
|
}
|
| 1373 |
|
|
}
|
| 1374 |
|
|
first = 1;
|
| 1375 |
|
|
scount = 0;
|
| 1376 |
|
|
psf_prev = 0;
|
| 1377 |
|
|
for (psf=*psf_list; psf; psf=psf_next) {
|
| 1378 |
|
|
struct in6_addr *psrc;
|
| 1379 |
|
|
|
| 1380 |
|
|
psf_next = psf->sf_next;
|
| 1381 |
|
|
|
| 1382 |
|
|
if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
|
| 1383 |
|
|
psf_prev = psf;
|
| 1384 |
|
|
continue;
|
| 1385 |
|
|
}
|
| 1386 |
|
|
|
| 1387 |
|
|
/* clear marks on query responses */
|
| 1388 |
|
|
if (isquery)
|
| 1389 |
|
|
psf->sf_gsresp = 0;
|
| 1390 |
|
|
|
| 1391 |
|
|
if (AVAILABLE(skb) < sizeof(*psrc) +
|
| 1392 |
|
|
first*sizeof(struct mld2_grec)) {
|
| 1393 |
|
|
if (truncate && !first)
|
| 1394 |
|
|
break; /* truncate these */
|
| 1395 |
|
|
if (pgr)
|
| 1396 |
|
|
pgr->grec_nsrcs = htons(scount);
|
| 1397 |
|
|
if (skb)
|
| 1398 |
|
|
mld_sendpack(skb);
|
| 1399 |
|
|
skb = mld_newpack(dev, dev->mtu);
|
| 1400 |
|
|
first = 1;
|
| 1401 |
|
|
scount = 0;
|
| 1402 |
|
|
}
|
| 1403 |
|
|
if (first) {
|
| 1404 |
|
|
skb = add_grhead(skb, pmc, type, &pgr);
|
| 1405 |
|
|
first = 0;
|
| 1406 |
|
|
}
|
| 1407 |
|
|
psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
|
| 1408 |
|
|
*psrc = psf->sf_addr;
|
| 1409 |
|
|
scount++;
|
| 1410 |
|
|
if ((type == MLD2_ALLOW_NEW_SOURCES ||
|
| 1411 |
|
|
type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
|
| 1412 |
|
|
psf->sf_crcount--;
|
| 1413 |
|
|
if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
|
| 1414 |
|
|
if (psf_prev)
|
| 1415 |
|
|
psf_prev->sf_next = psf->sf_next;
|
| 1416 |
|
|
else
|
| 1417 |
|
|
*psf_list = psf->sf_next;
|
| 1418 |
|
|
kfree(psf);
|
| 1419 |
|
|
continue;
|
| 1420 |
|
|
}
|
| 1421 |
|
|
}
|
| 1422 |
|
|
psf_prev = psf;
|
| 1423 |
|
|
}
|
| 1424 |
|
|
if (pgr)
|
| 1425 |
|
|
pgr->grec_nsrcs = htons(scount);
|
| 1426 |
|
|
|
| 1427 |
|
|
if (isquery)
|
| 1428 |
|
|
pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
|
| 1429 |
|
|
return skb;
|
| 1430 |
|
|
}
|
| 1431 |
|
|
|
| 1432 |
|
|
static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
|
| 1433 |
|
|
{
|
| 1434 |
|
|
struct sk_buff *skb = 0;
|
| 1435 |
|
|
int type;
|
| 1436 |
|
|
|
| 1437 |
|
|
if (!pmc) {
|
| 1438 |
|
|
read_lock_bh(&idev->lock);
|
| 1439 |
|
|
for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
|
| 1440 |
|
|
if (pmc->mca_flags & MAF_NOREPORT)
|
| 1441 |
|
|
continue;
|
| 1442 |
|
|
spin_lock_bh(&pmc->mca_lock);
|
| 1443 |
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE])
|
| 1444 |
|
|
type = MLD2_MODE_IS_EXCLUDE;
|
| 1445 |
|
|
else
|
| 1446 |
|
|
type = MLD2_MODE_IS_INCLUDE;
|
| 1447 |
|
|
skb = add_grec(skb, pmc, type, 0, 0);
|
| 1448 |
|
|
spin_unlock_bh(&pmc->mca_lock);
|
| 1449 |
|
|
}
|
| 1450 |
|
|
read_unlock_bh(&idev->lock);
|
| 1451 |
|
|
} else {
|
| 1452 |
|
|
spin_lock_bh(&pmc->mca_lock);
|
| 1453 |
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE])
|
| 1454 |
|
|
type = MLD2_MODE_IS_EXCLUDE;
|
| 1455 |
|
|
else
|
| 1456 |
|
|
type = MLD2_MODE_IS_INCLUDE;
|
| 1457 |
|
|
skb = add_grec(skb, pmc, type, 0, 0);
|
| 1458 |
|
|
spin_unlock_bh(&pmc->mca_lock);
|
| 1459 |
|
|
}
|
| 1460 |
|
|
if (skb)
|
| 1461 |
|
|
mld_sendpack(skb);
|
| 1462 |
|
|
}
|
| 1463 |
|
|
|
| 1464 |
|
|
/*
|
| 1465 |
|
|
* remove zero-count source records from a source filter list
|
| 1466 |
|
|
*/
|
| 1467 |
|
|
static void mld_clear_zeros(struct ip6_sf_list **ppsf)
|
| 1468 |
|
|
{
|
| 1469 |
|
|
struct ip6_sf_list *psf_prev, *psf_next, *psf;
|
| 1470 |
|
|
|
| 1471 |
|
|
psf_prev = 0;
|
| 1472 |
|
|
for (psf=*ppsf; psf; psf = psf_next) {
|
| 1473 |
|
|
psf_next = psf->sf_next;
|
| 1474 |
|
|
if (psf->sf_crcount == 0) {
|
| 1475 |
|
|
if (psf_prev)
|
| 1476 |
|
|
psf_prev->sf_next = psf->sf_next;
|
| 1477 |
|
|
else
|
| 1478 |
|
|
*ppsf = psf->sf_next;
|
| 1479 |
|
|
kfree(psf);
|
| 1480 |
|
|
} else
|
| 1481 |
|
|
psf_prev = psf;
|
| 1482 |
|
|
}
|
| 1483 |
|
|
}
|
| 1484 |
|
|
|
| 1485 |
|
|
static void mld_send_cr(struct inet6_dev *idev)
|
| 1486 |
|
|
{
|
| 1487 |
|
|
struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
|
| 1488 |
|
|
struct sk_buff *skb = 0;
|
| 1489 |
|
|
int type, dtype;
|
| 1490 |
|
|
|
| 1491 |
|
|
read_lock_bh(&idev->lock);
|
| 1492 |
|
|
write_lock_bh(&idev->mc_lock);
|
| 1493 |
|
|
|
| 1494 |
|
|
/* deleted MCA's */
|
| 1495 |
|
|
pmc_prev = 0;
|
| 1496 |
|
|
for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) {
|
| 1497 |
|
|
pmc_next = pmc->next;
|
| 1498 |
|
|
if (pmc->mca_sfmode == MCAST_INCLUDE) {
|
| 1499 |
|
|
type = MLD2_BLOCK_OLD_SOURCES;
|
| 1500 |
|
|
dtype = MLD2_BLOCK_OLD_SOURCES;
|
| 1501 |
|
|
skb = add_grec(skb, pmc, type, 1, 0);
|
| 1502 |
|
|
skb = add_grec(skb, pmc, dtype, 1, 1);
|
| 1503 |
|
|
}
|
| 1504 |
|
|
if (pmc->mca_crcount) {
|
| 1505 |
|
|
pmc->mca_crcount--;
|
| 1506 |
|
|
if (pmc->mca_sfmode == MCAST_EXCLUDE) {
|
| 1507 |
|
|
type = MLD2_CHANGE_TO_INCLUDE;
|
| 1508 |
|
|
skb = add_grec(skb, pmc, type, 1, 0);
|
| 1509 |
|
|
}
|
| 1510 |
|
|
if (pmc->mca_crcount == 0) {
|
| 1511 |
|
|
mld_clear_zeros(&pmc->mca_tomb);
|
| 1512 |
|
|
mld_clear_zeros(&pmc->mca_sources);
|
| 1513 |
|
|
}
|
| 1514 |
|
|
}
|
| 1515 |
|
|
if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
|
| 1516 |
|
|
!pmc->mca_sources) {
|
| 1517 |
|
|
if (pmc_prev)
|
| 1518 |
|
|
pmc_prev->next = pmc_next;
|
| 1519 |
|
|
else
|
| 1520 |
|
|
idev->mc_tomb = pmc_next;
|
| 1521 |
|
|
in6_dev_put(pmc->idev);
|
| 1522 |
|
|
kfree(pmc);
|
| 1523 |
|
|
} else
|
| 1524 |
|
|
pmc_prev = pmc;
|
| 1525 |
|
|
}
|
| 1526 |
|
|
write_unlock_bh(&idev->mc_lock);
|
| 1527 |
|
|
|
| 1528 |
|
|
/* change recs */
|
| 1529 |
|
|
for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
|
| 1530 |
|
|
spin_lock_bh(&pmc->mca_lock);
|
| 1531 |
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
|
| 1532 |
|
|
type = MLD2_BLOCK_OLD_SOURCES;
|
| 1533 |
|
|
dtype = MLD2_ALLOW_NEW_SOURCES;
|
| 1534 |
|
|
} else {
|
| 1535 |
|
|
type = MLD2_ALLOW_NEW_SOURCES;
|
| 1536 |
|
|
dtype = MLD2_BLOCK_OLD_SOURCES;
|
| 1537 |
|
|
}
|
| 1538 |
|
|
skb = add_grec(skb, pmc, type, 0, 0);
|
| 1539 |
|
|
skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */
|
| 1540 |
|
|
|
| 1541 |
|
|
/* filter mode changes */
|
| 1542 |
|
|
if (pmc->mca_crcount) {
|
| 1543 |
|
|
pmc->mca_crcount--;
|
| 1544 |
|
|
if (pmc->mca_sfmode == MCAST_EXCLUDE)
|
| 1545 |
|
|
type = MLD2_CHANGE_TO_EXCLUDE;
|
| 1546 |
|
|
else
|
| 1547 |
|
|
type = MLD2_CHANGE_TO_INCLUDE;
|
| 1548 |
|
|
skb = add_grec(skb, pmc, type, 0, 0);
|
| 1549 |
|
|
}
|
| 1550 |
|
|
spin_unlock_bh(&pmc->mca_lock);
|
| 1551 |
|
|
}
|
| 1552 |
|
|
read_unlock_bh(&idev->lock);
|
| 1553 |
|
|
if (!skb)
|
| 1554 |
|
|
return;
|
| 1555 |
|
|
(void) mld_sendpack(skb);
|
| 1556 |
|
|
}
|
| 1557 |
|
|
|
| 1558 |
|
|
void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
|
| 1559 |
|
|
{
|
| 1560 |
|
|
struct sock *sk = igmp6_socket->sk;
|
| 1561 |
|
|
struct sk_buff *skb;
|
| 1562 |
|
|
struct icmp6hdr *hdr;
|
| 1563 |
|
|
struct in6_addr *snd_addr;
|
| 1564 |
|
|
struct in6_addr *addrp;
|
| 1565 |
|
|
struct in6_addr addr_buf;
|
| 1566 |
|
|
struct in6_addr all_routers;
|
| 1567 |
|
|
int err, len, payload_len, full_len;
|
| 1568 |
|
|
u8 ra[8] = { IPPROTO_ICMPV6, 0,
|
| 1569 |
|
|
IPV6_TLV_ROUTERALERT, 2, 0, 0,
|
| 1570 |
|
|
IPV6_TLV_PADN, 0 };
|
| 1571 |
|
|
|
| 1572 |
|
|
snd_addr = addr;
|
| 1573 |
|
|
if (type == ICMPV6_MGM_REDUCTION) {
|
| 1574 |
|
|
snd_addr = &all_routers;
|
| 1575 |
|
|
ipv6_addr_all_routers(&all_routers);
|
| 1576 |
|
|
}
|
| 1577 |
|
|
|
| 1578 |
|
|
len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
|
| 1579 |
|
|
payload_len = len + sizeof(ra);
|
| 1580 |
|
|
full_len = sizeof(struct ipv6hdr) + payload_len;
|
| 1581 |
|
|
|
| 1582 |
|
|
skb = sock_alloc_send_skb(sk, dev->hard_header_len + full_len + 15, 1, &err);
|
| 1583 |
|
|
|
| 1584 |
|
|
if (skb == NULL)
|
| 1585 |
|
|
return;
|
| 1586 |
|
|
|
| 1587 |
|
|
skb_reserve(skb, (dev->hard_header_len + 15) & ~15);
|
| 1588 |
|
|
if (dev->hard_header) {
|
| 1589 |
|
|
unsigned char ha[MAX_ADDR_LEN];
|
| 1590 |
|
|
ndisc_mc_map(snd_addr, ha, dev, 1);
|
| 1591 |
|
|
if (dev->hard_header(skb, dev, ETH_P_IPV6, ha, NULL, full_len) < 0)
|
| 1592 |
|
|
goto out;
|
| 1593 |
|
|
}
|
| 1594 |
|
|
|
| 1595 |
|
|
if (ipv6_get_lladdr(dev, &addr_buf)) {
|
| 1596 |
|
|
/* <draft-ietf-magma-mld-source-02.txt>:
|
| 1597 |
|
|
* use unspecified address as the source address
|
| 1598 |
|
|
* when a valid link-local address is not available.
|
| 1599 |
|
|
*/
|
| 1600 |
|
|
memset(&addr_buf, 0, sizeof(addr_buf));
|
| 1601 |
|
|
}
|
| 1602 |
|
|
|
| 1603 |
|
|
ip6_nd_hdr(sk, skb, dev, &addr_buf, snd_addr, NEXTHDR_HOP, payload_len);
|
| 1604 |
|
|
|
| 1605 |
|
|
memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
|
| 1606 |
|
|
|
| 1607 |
|
|
hdr = (struct icmp6hdr *) skb_put(skb, sizeof(struct icmp6hdr));
|
| 1608 |
|
|
memset(hdr, 0, sizeof(struct icmp6hdr));
|
| 1609 |
|
|
hdr->icmp6_type = type;
|
| 1610 |
|
|
|
| 1611 |
|
|
addrp = (struct in6_addr *) skb_put(skb, sizeof(struct in6_addr));
|
| 1612 |
|
|
ipv6_addr_copy(addrp, addr);
|
| 1613 |
|
|
|
| 1614 |
|
|
hdr->icmp6_cksum = csum_ipv6_magic(&addr_buf, snd_addr, len,
|
| 1615 |
|
|
IPPROTO_ICMPV6,
|
| 1616 |
|
|
csum_partial((__u8 *) hdr, len, 0));
|
| 1617 |
|
|
|
| 1618 |
|
|
err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dev,
|
| 1619 |
|
|
dev_queue_xmit);
|
| 1620 |
|
|
if (!err) {
|
| 1621 |
|
|
if (type == ICMPV6_MGM_REDUCTION)
|
| 1622 |
|
|
ICMP6_INC_STATS(Icmp6OutGroupMembReductions);
|
| 1623 |
|
|
else
|
| 1624 |
|
|
ICMP6_INC_STATS(Icmp6OutGroupMembResponses);
|
| 1625 |
|
|
ICMP6_INC_STATS(Icmp6OutMsgs);
|
| 1626 |
|
|
}
|
| 1627 |
|
|
|
| 1628 |
|
|
return;
|
| 1629 |
|
|
|
| 1630 |
|
|
out:
|
| 1631 |
|
|
kfree_skb(skb);
|
| 1632 |
|
|
}
|
| 1633 |
|
|
|
| 1634 |
|
|
static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
|
| 1635 |
|
|
struct in6_addr *psfsrc)
|
| 1636 |
|
|
{
|
| 1637 |
|
|
struct ip6_sf_list *psf, *psf_prev;
|
| 1638 |
|
|
int rv = 0;
|
| 1639 |
|
|
|
| 1640 |
|
|
psf_prev = 0;
|
| 1641 |
|
|
for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
|
| 1642 |
|
|
if (ipv6_addr_cmp(&psf->sf_addr, psfsrc) == 0)
|
| 1643 |
|
|
break;
|
| 1644 |
|
|
psf_prev = psf;
|
| 1645 |
|
|
}
|
| 1646 |
|
|
if (!psf || psf->sf_count[sfmode] == 0) {
|
| 1647 |
|
|
/* source filter not found, or count wrong => bug */
|
| 1648 |
|
|
return -ESRCH;
|
| 1649 |
|
|
}
|
| 1650 |
|
|
psf->sf_count[sfmode]--;
|
| 1651 |
|
|
if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
|
| 1652 |
|
|
struct inet6_dev *idev = pmc->idev;
|
| 1653 |
|
|
|
| 1654 |
|
|
/* no more filters for this source */
|
| 1655 |
|
|
if (psf_prev)
|
| 1656 |
|
|
psf_prev->sf_next = psf->sf_next;
|
| 1657 |
|
|
else
|
| 1658 |
|
|
pmc->mca_sources = psf->sf_next;
|
| 1659 |
|
|
if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
|
| 1660 |
|
|
!MLD_V1_SEEN(idev)) {
|
| 1661 |
|
|
psf->sf_crcount = idev->mc_qrv;
|
| 1662 |
|
|
psf->sf_next = pmc->mca_tomb;
|
| 1663 |
|
|
pmc->mca_tomb = psf;
|
| 1664 |
|
|
rv = 1;
|
| 1665 |
|
|
} else
|
| 1666 |
|
|
kfree(psf);
|
| 1667 |
|
|
}
|
| 1668 |
|
|
return rv;
|
| 1669 |
|
|
}
|
| 1670 |
|
|
|
| 1671 |
|
|
int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, int sfmode,
|
| 1672 |
|
|
int sfcount, struct in6_addr *psfsrc, int delta)
|
| 1673 |
|
|
{
|
| 1674 |
|
|
struct ifmcaddr6 *pmc;
|
| 1675 |
|
|
int changerec = 0;
|
| 1676 |
|
|
int i, err;
|
| 1677 |
|
|
|
| 1678 |
|
|
if (!idev)
|
| 1679 |
|
|
return -ENODEV;
|
| 1680 |
|
|
read_lock_bh(&idev->lock);
|
| 1681 |
|
|
for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
|
| 1682 |
|
|
if (ipv6_addr_cmp(pmca, &pmc->mca_addr) == 0)
|
| 1683 |
|
|
break;
|
| 1684 |
|
|
}
|
| 1685 |
|
|
if (!pmc) {
|
| 1686 |
|
|
/* MCA not found?? bug */
|
| 1687 |
|
|
read_unlock_bh(&idev->lock);
|
| 1688 |
|
|
return -ESRCH;
|
| 1689 |
|
|
}
|
| 1690 |
|
|
spin_lock_bh(&pmc->mca_lock);
|
| 1691 |
|
|
sf_markstate(pmc);
|
| 1692 |
|
|
if (!delta) {
|
| 1693 |
|
|
if (!pmc->mca_sfcount[sfmode]) {
|
| 1694 |
|
|
spin_unlock_bh(&pmc->mca_lock);
|
| 1695 |
|
|
read_unlock_bh(&idev->lock);
|
| 1696 |
|
|
return -EINVAL;
|
| 1697 |
|
|
}
|
| 1698 |
|
|
pmc->mca_sfcount[sfmode]--;
|
| 1699 |
|
|
}
|
| 1700 |
|
|
err = 0;
|
| 1701 |
|
|
for (i=0; i<sfcount; i++) {
|
| 1702 |
|
|
int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
|
| 1703 |
|
|
|
| 1704 |
|
|
changerec |= rv > 0;
|
| 1705 |
|
|
if (!err && rv < 0)
|
| 1706 |
|
|
err = rv;
|
| 1707 |
|
|
}
|
| 1708 |
|
|
if (pmc->mca_sfmode == MCAST_EXCLUDE &&
|
| 1709 |
|
|
pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
|
| 1710 |
|
|
pmc->mca_sfcount[MCAST_INCLUDE]) {
|
| 1711 |
|
|
struct ip6_sf_list *psf;
|
| 1712 |
|
|
|
| 1713 |
|
|
/* filter mode change */
|
| 1714 |
|
|
pmc->mca_sfmode = MCAST_INCLUDE;
|
| 1715 |
|
|
pmc->mca_crcount = idev->mc_qrv;
|
| 1716 |
|
|
idev->mc_ifc_count = pmc->mca_crcount;
|
| 1717 |
|
|
for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
|
| 1718 |
|
|
psf->sf_crcount = 0;
|
| 1719 |
|
|
mld_ifc_event(pmc->idev);
|
| 1720 |
|
|
} else if (sf_setstate(pmc) || changerec)
|
| 1721 |
|
|
mld_ifc_event(pmc->idev);
|
| 1722 |
|
|
spin_unlock_bh(&pmc->mca_lock);
|
| 1723 |
|
|
read_unlock_bh(&idev->lock);
|
| 1724 |
|
|
return err;
|
| 1725 |
|
|
}
|
| 1726 |
|
|
|
| 1727 |
|
|
/*
|
| 1728 |
|
|
* Add multicast single-source filter to the interface list
|
| 1729 |
|
|
*/
|
| 1730 |
|
|
static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
|
| 1731 |
|
|
struct in6_addr *psfsrc, int delta)
|
| 1732 |
|
|
{
|
| 1733 |
|
|
struct ip6_sf_list *psf, *psf_prev;
|
| 1734 |
|
|
|
| 1735 |
|
|
psf_prev = 0;
|
| 1736 |
|
|
for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
|
| 1737 |
|
|
if (ipv6_addr_cmp(&psf->sf_addr, psfsrc) == 0)
|
| 1738 |
|
|
break;
|
| 1739 |
|
|
psf_prev = psf;
|
| 1740 |
|
|
}
|
| 1741 |
|
|
if (!psf) {
|
| 1742 |
|
|
psf = (struct ip6_sf_list *)kmalloc(sizeof(*psf), GFP_ATOMIC);
|
| 1743 |
|
|
if (!psf)
|
| 1744 |
|
|
return -ENOBUFS;
|
| 1745 |
|
|
memset(psf, 0, sizeof(*psf));
|
| 1746 |
|
|
psf->sf_addr = *psfsrc;
|
| 1747 |
|
|
if (psf_prev) {
|
| 1748 |
|
|
psf_prev->sf_next = psf;
|
| 1749 |
|
|
} else
|
| 1750 |
|
|
pmc->mca_sources = psf;
|
| 1751 |
|
|
}
|
| 1752 |
|
|
psf->sf_count[sfmode]++;
|
| 1753 |
|
|
return 0;
|
| 1754 |
|
|
}
|
| 1755 |
|
|
|
| 1756 |
|
|
static void sf_markstate(struct ifmcaddr6 *pmc)
|
| 1757 |
|
|
{
|
| 1758 |
|
|
struct ip6_sf_list *psf;
|
| 1759 |
|
|
int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
|
| 1760 |
|
|
|
| 1761 |
|
|
for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
|
| 1762 |
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
|
| 1763 |
|
|
psf->sf_oldin = mca_xcount ==
|
| 1764 |
|
|
psf->sf_count[MCAST_EXCLUDE] &&
|
| 1765 |
|
|
!psf->sf_count[MCAST_INCLUDE];
|
| 1766 |
|
|
} else
|
| 1767 |
|
|
psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
|
| 1768 |
|
|
}
|
| 1769 |
|
|
|
| 1770 |
|
|
static int sf_setstate(struct ifmcaddr6 *pmc)
|
| 1771 |
|
|
{
|
| 1772 |
|
|
struct ip6_sf_list *psf;
|
| 1773 |
|
|
int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
|
| 1774 |
|
|
int qrv = pmc->idev->mc_qrv;
|
| 1775 |
|
|
int new_in, rv;
|
| 1776 |
|
|
|
| 1777 |
|
|
rv = 0;
|
| 1778 |
|
|
for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
|
| 1779 |
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
|
| 1780 |
|
|
new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
|
| 1781 |
|
|
!psf->sf_count[MCAST_INCLUDE];
|
| 1782 |
|
|
} else
|
| 1783 |
|
|
new_in = psf->sf_count[MCAST_INCLUDE] != 0;
|
| 1784 |
|
|
if (new_in != psf->sf_oldin) {
|
| 1785 |
|
|
psf->sf_crcount = qrv;
|
| 1786 |
|
|
rv++;
|
| 1787 |
|
|
}
|
| 1788 |
|
|
}
|
| 1789 |
|
|
return rv;
|
| 1790 |
|
|
}
|
| 1791 |
|
|
|
| 1792 |
|
|
/*
|
| 1793 |
|
|
* Add multicast source filter list to the interface list
|
| 1794 |
|
|
*/
|
| 1795 |
|
|
int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, int sfmode,
|
| 1796 |
|
|
int sfcount, struct in6_addr *psfsrc, int delta)
|
| 1797 |
|
|
{
|
| 1798 |
|
|
struct ifmcaddr6 *pmc;
|
| 1799 |
|
|
int isexclude;
|
| 1800 |
|
|
int i, err;
|
| 1801 |
|
|
|
| 1802 |
|
|
if (!idev)
|
| 1803 |
|
|
return -ENODEV;
|
| 1804 |
|
|
read_lock_bh(&idev->lock);
|
| 1805 |
|
|
for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
|
| 1806 |
|
|
if (ipv6_addr_cmp(pmca, &pmc->mca_addr) == 0)
|
| 1807 |
|
|
break;
|
| 1808 |
|
|
}
|
| 1809 |
|
|
if (!pmc) {
|
| 1810 |
|
|
/* MCA not found?? bug */
|
| 1811 |
|
|
read_unlock_bh(&idev->lock);
|
| 1812 |
|
|
return -ESRCH;
|
| 1813 |
|
|
}
|
| 1814 |
|
|
spin_lock_bh(&pmc->mca_lock);
|
| 1815 |
|
|
|
| 1816 |
|
|
sf_markstate(pmc);
|
| 1817 |
|
|
isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
|
| 1818 |
|
|
if (!delta)
|
| 1819 |
|
|
pmc->mca_sfcount[sfmode]++;
|
| 1820 |
|
|
err = 0;
|
| 1821 |
|
|
for (i=0; i<sfcount; i++) {
|
| 1822 |
|
|
err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta);
|
| 1823 |
|
|
if (err)
|
| 1824 |
|
|
break;
|
| 1825 |
|
|
}
|
| 1826 |
|
|
if (err) {
|
| 1827 |
|
|
int j;
|
| 1828 |
|
|
|
| 1829 |
|
|
pmc->mca_sfcount[sfmode]--;
|
| 1830 |
|
|
for (j=0; j<i; j++)
|
| 1831 |
|
|
(void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
|
| 1832 |
|
|
} else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
|
| 1833 |
|
|
struct inet6_dev *idev = pmc->idev;
|
| 1834 |
|
|
struct ip6_sf_list *psf;
|
| 1835 |
|
|
|
| 1836 |
|
|
/* filter mode change */
|
| 1837 |
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE])
|
| 1838 |
|
|
pmc->mca_sfmode = MCAST_EXCLUDE;
|
| 1839 |
|
|
else if (pmc->mca_sfcount[MCAST_INCLUDE])
|
| 1840 |
|
|
pmc->mca_sfmode = MCAST_INCLUDE;
|
| 1841 |
|
|
/* else no filters; keep old mode for reports */
|
| 1842 |
|
|
|
| 1843 |
|
|
pmc->mca_crcount = idev->mc_qrv;
|
| 1844 |
|
|
idev->mc_ifc_count = pmc->mca_crcount;
|
| 1845 |
|
|
for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
|
| 1846 |
|
|
psf->sf_crcount = 0;
|
| 1847 |
|
|
mld_ifc_event(idev);
|
| 1848 |
|
|
} else if (sf_setstate(pmc))
|
| 1849 |
|
|
mld_ifc_event(idev);
|
| 1850 |
|
|
spin_unlock_bh(&pmc->mca_lock);
|
| 1851 |
|
|
read_unlock_bh(&idev->lock);
|
| 1852 |
|
|
return err;
|
| 1853 |
|
|
}
|
| 1854 |
|
|
|
| 1855 |
|
|
static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
|
| 1856 |
|
|
{
|
| 1857 |
|
|
struct ip6_sf_list *psf, *nextpsf;
|
| 1858 |
|
|
|
| 1859 |
|
|
for (psf=pmc->mca_tomb; psf; psf=nextpsf) {
|
| 1860 |
|
|
nextpsf = psf->sf_next;
|
| 1861 |
|
|
kfree(psf);
|
| 1862 |
|
|
}
|
| 1863 |
|
|
pmc->mca_tomb = 0;
|
| 1864 |
|
|
for (psf=pmc->mca_sources; psf; psf=nextpsf) {
|
| 1865 |
|
|
nextpsf = psf->sf_next;
|
| 1866 |
|
|
kfree(psf);
|
| 1867 |
|
|
}
|
| 1868 |
|
|
pmc->mca_sources = 0;
|
| 1869 |
|
|
pmc->mca_sfmode = MCAST_EXCLUDE;
|
| 1870 |
|
|
pmc->mca_sfcount[MCAST_EXCLUDE] = 0;
|
| 1871 |
|
|
pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
|
| 1872 |
|
|
}
|
| 1873 |
|
|
|
| 1874 |
|
|
static void igmp6_join_group(struct ifmcaddr6 *ma)
|
| 1875 |
|
|
{
|
| 1876 |
|
|
unsigned long delay;
|
| 1877 |
|
|
|
| 1878 |
|
|
if (ma->mca_flags & MAF_NOREPORT)
|
| 1879 |
|
|
return;
|
| 1880 |
|
|
|
| 1881 |
|
|
igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
|
| 1882 |
|
|
|
| 1883 |
|
|
delay = net_random() % IGMP6_UNSOLICITED_IVAL;
|
| 1884 |
|
|
|
| 1885 |
|
|
spin_lock_bh(&ma->mca_lock);
|
| 1886 |
|
|
if (del_timer(&ma->mca_timer)) {
|
| 1887 |
|
|
atomic_dec(&ma->mca_refcnt);
|
| 1888 |
|
|
delay = ma->mca_timer.expires - jiffies;
|
| 1889 |
|
|
}
|
| 1890 |
|
|
|
| 1891 |
|
|
if (!mod_timer(&ma->mca_timer, jiffies + delay))
|
| 1892 |
|
|
atomic_inc(&ma->mca_refcnt);
|
| 1893 |
|
|
ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
|
| 1894 |
|
|
spin_unlock_bh(&ma->mca_lock);
|
| 1895 |
|
|
}
|
| 1896 |
|
|
|
| 1897 |
|
|
int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
|
| 1898 |
|
|
struct inet6_dev *idev)
|
| 1899 |
|
|
{
|
| 1900 |
|
|
int err;
|
| 1901 |
|
|
|
| 1902 |
|
|
if (iml->sflist == 0) {
|
| 1903 |
|
|
/* any-source empty exclude case */
|
| 1904 |
|
|
return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, 0, 0);
|
| 1905 |
|
|
}
|
| 1906 |
|
|
err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
|
| 1907 |
|
|
iml->sflist->sl_count, iml->sflist->sl_addr, 0);
|
| 1908 |
|
|
sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
|
| 1909 |
|
|
iml->sflist = 0;
|
| 1910 |
|
|
return err;
|
| 1911 |
|
|
}
|
| 1912 |
|
|
|
| 1913 |
|
|
static void igmp6_leave_group(struct ifmcaddr6 *ma)
|
| 1914 |
|
|
{
|
| 1915 |
|
|
if (MLD_V1_SEEN(ma->idev)) {
|
| 1916 |
|
|
if (ma->mca_flags & MAF_LAST_REPORTER)
|
| 1917 |
|
|
igmp6_send(&ma->mca_addr, ma->idev->dev,
|
| 1918 |
|
|
ICMPV6_MGM_REDUCTION);
|
| 1919 |
|
|
} else {
|
| 1920 |
|
|
mld_add_delrec(ma->idev, ma);
|
| 1921 |
|
|
mld_ifc_event(ma->idev);
|
| 1922 |
|
|
}
|
| 1923 |
|
|
}
|
| 1924 |
|
|
|
| 1925 |
|
|
static void mld_gq_timer_expire(unsigned long data)
|
| 1926 |
|
|
{
|
| 1927 |
|
|
struct inet6_dev *idev = (struct inet6_dev *)data;
|
| 1928 |
|
|
|
| 1929 |
|
|
idev->mc_gq_running = 0;
|
| 1930 |
|
|
mld_send_report(idev, 0);
|
| 1931 |
|
|
__in6_dev_put(idev);
|
| 1932 |
|
|
}
|
| 1933 |
|
|
|
| 1934 |
|
|
static void mld_ifc_timer_expire(unsigned long data)
|
| 1935 |
|
|
{
|
| 1936 |
|
|
struct inet6_dev *idev = (struct inet6_dev *)data;
|
| 1937 |
|
|
|
| 1938 |
|
|
mld_send_cr(idev);
|
| 1939 |
|
|
if (idev->mc_ifc_count) {
|
| 1940 |
|
|
idev->mc_ifc_count--;
|
| 1941 |
|
|
if (idev->mc_ifc_count)
|
| 1942 |
|
|
mld_ifc_start_timer(idev, idev->mc_maxdelay);
|
| 1943 |
|
|
}
|
| 1944 |
|
|
__in6_dev_put(idev);
|
| 1945 |
|
|
}
|
| 1946 |
|
|
|
| 1947 |
|
|
static void mld_ifc_event(struct inet6_dev *idev)
|
| 1948 |
|
|
{
|
| 1949 |
|
|
if (MLD_V1_SEEN(idev))
|
| 1950 |
|
|
return;
|
| 1951 |
|
|
idev->mc_ifc_count = idev->mc_qrv;
|
| 1952 |
|
|
mld_ifc_start_timer(idev, 1);
|
| 1953 |
|
|
}
|
| 1954 |
|
|
|
| 1955 |
|
|
|
| 1956 |
|
|
static void igmp6_timer_handler(unsigned long data)
|
| 1957 |
|
|
{
|
| 1958 |
|
|
struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
|
| 1959 |
|
|
|
| 1960 |
|
|
if (MLD_V1_SEEN(ma->idev))
|
| 1961 |
|
|
igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
|
| 1962 |
|
|
else
|
| 1963 |
|
|
mld_send_report(ma->idev, ma);
|
| 1964 |
|
|
|
| 1965 |
|
|
spin_lock(&ma->mca_lock);
|
| 1966 |
|
|
ma->mca_flags |= MAF_LAST_REPORTER;
|
| 1967 |
|
|
ma->mca_flags &= ~MAF_TIMER_RUNNING;
|
| 1968 |
|
|
spin_unlock(&ma->mca_lock);
|
| 1969 |
|
|
ma_put(ma);
|
| 1970 |
|
|
}
|
| 1971 |
|
|
|
| 1972 |
|
|
/* Device going down */
|
| 1973 |
|
|
|
| 1974 |
|
|
void ipv6_mc_down(struct inet6_dev *idev)
|
| 1975 |
|
|
{
|
| 1976 |
|
|
struct ifmcaddr6 *i;
|
| 1977 |
|
|
|
| 1978 |
|
|
/* Withdraw multicast list */
|
| 1979 |
|
|
|
| 1980 |
|
|
read_lock_bh(&idev->lock);
|
| 1981 |
|
|
idev->mc_ifc_count = 0;
|
| 1982 |
|
|
if (del_timer(&idev->mc_ifc_timer))
|
| 1983 |
|
|
__in6_dev_put(idev);
|
| 1984 |
|
|
idev->mc_gq_running = 0;
|
| 1985 |
|
|
if (del_timer(&idev->mc_gq_timer))
|
| 1986 |
|
|
__in6_dev_put(idev);
|
| 1987 |
|
|
|
| 1988 |
|
|
for (i = idev->mc_list; i; i=i->next)
|
| 1989 |
|
|
igmp6_group_dropped(i);
|
| 1990 |
|
|
read_unlock_bh(&idev->lock);
|
| 1991 |
|
|
|
| 1992 |
|
|
mld_clear_delrec(idev);
|
| 1993 |
|
|
}
|
| 1994 |
|
|
|
| 1995 |
|
|
|
| 1996 |
|
|
/* Device going up */
|
| 1997 |
|
|
|
| 1998 |
|
|
void ipv6_mc_up(struct inet6_dev *idev)
|
| 1999 |
|
|
{
|
| 2000 |
|
|
struct ifmcaddr6 *i;
|
| 2001 |
|
|
|
| 2002 |
|
|
/* Install multicast list, except for all-nodes (already installed) */
|
| 2003 |
|
|
|
| 2004 |
|
|
read_lock_bh(&idev->lock);
|
| 2005 |
|
|
for (i = idev->mc_list; i; i=i->next)
|
| 2006 |
|
|
igmp6_group_added(i);
|
| 2007 |
|
|
read_unlock_bh(&idev->lock);
|
| 2008 |
|
|
}
|
| 2009 |
|
|
|
| 2010 |
|
|
/* IPv6 device initialization. */
|
| 2011 |
|
|
|
| 2012 |
|
|
void ipv6_mc_init_dev(struct inet6_dev *idev)
|
| 2013 |
|
|
{
|
| 2014 |
|
|
struct in6_addr maddr;
|
| 2015 |
|
|
|
| 2016 |
|
|
write_lock_bh(&idev->lock);
|
| 2017 |
|
|
idev->mc_lock = RW_LOCK_UNLOCKED;
|
| 2018 |
|
|
idev->mc_gq_running = 0;
|
| 2019 |
|
|
init_timer(&idev->mc_gq_timer);
|
| 2020 |
|
|
idev->mc_gq_timer.data = (unsigned long) idev;
|
| 2021 |
|
|
idev->mc_gq_timer.function = &mld_gq_timer_expire;
|
| 2022 |
|
|
idev->mc_tomb = 0;
|
| 2023 |
|
|
idev->mc_ifc_count = 0;
|
| 2024 |
|
|
init_timer(&idev->mc_ifc_timer);
|
| 2025 |
|
|
idev->mc_ifc_timer.data = (unsigned long) idev;
|
| 2026 |
|
|
idev->mc_ifc_timer.function = &mld_ifc_timer_expire;
|
| 2027 |
|
|
idev->mc_qrv = MLD_QRV_DEFAULT;
|
| 2028 |
|
|
idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL;
|
| 2029 |
|
|
idev->mc_v1_seen = 0;
|
| 2030 |
|
|
write_unlock_bh(&idev->lock);
|
| 2031 |
|
|
|
| 2032 |
|
|
/* Add all-nodes address. */
|
| 2033 |
|
|
ipv6_addr_all_nodes(&maddr);
|
| 2034 |
|
|
ipv6_dev_mc_inc(idev->dev, &maddr);
|
| 2035 |
|
|
}
|
| 2036 |
|
|
|
| 2037 |
|
|
/*
|
| 2038 |
|
|
* Device is about to be destroyed: clean up.
|
| 2039 |
|
|
*/
|
| 2040 |
|
|
|
| 2041 |
|
|
void ipv6_mc_destroy_dev(struct inet6_dev *idev)
|
| 2042 |
|
|
{
|
| 2043 |
|
|
struct ifmcaddr6 *i;
|
| 2044 |
|
|
struct in6_addr maddr;
|
| 2045 |
|
|
|
| 2046 |
|
|
/* Deactivate timers */
|
| 2047 |
|
|
ipv6_mc_down(idev);
|
| 2048 |
|
|
|
| 2049 |
|
|
/* Delete all-nodes address. */
|
| 2050 |
|
|
ipv6_addr_all_nodes(&maddr);
|
| 2051 |
|
|
|
| 2052 |
|
|
/* We cannot call ipv6_dev_mc_dec() directly, our caller in
|
| 2053 |
|
|
* addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
|
| 2054 |
|
|
* fail.
|
| 2055 |
|
|
*/
|
| 2056 |
|
|
__ipv6_dev_mc_dec(idev->dev, idev, &maddr);
|
| 2057 |
|
|
|
| 2058 |
|
|
write_lock_bh(&idev->lock);
|
| 2059 |
|
|
while ((i = idev->mc_list) != NULL) {
|
| 2060 |
|
|
idev->mc_list = i->next;
|
| 2061 |
|
|
write_unlock_bh(&idev->lock);
|
| 2062 |
|
|
|
| 2063 |
|
|
igmp6_group_dropped(i);
|
| 2064 |
|
|
ma_put(i);
|
| 2065 |
|
|
|
| 2066 |
|
|
write_lock_bh(&idev->lock);
|
| 2067 |
|
|
}
|
| 2068 |
|
|
write_unlock_bh(&idev->lock);
|
| 2069 |
|
|
}
|
| 2070 |
|
|
|
| 2071 |
|
|
#ifdef CONFIG_PROC_FS
|
| 2072 |
|
|
static int igmp6_read_proc(char *buffer, char **start, off_t offset,
|
| 2073 |
|
|
int length, int *eof, void *data)
|
| 2074 |
|
|
{
|
| 2075 |
|
|
off_t pos=0, begin=0;
|
| 2076 |
|
|
struct ifmcaddr6 *im;
|
| 2077 |
|
|
int len=0;
|
| 2078 |
|
|
struct net_device *dev;
|
| 2079 |
|
|
|
| 2080 |
|
|
read_lock(&dev_base_lock);
|
| 2081 |
|
|
for (dev = dev_base; dev; dev = dev->next) {
|
| 2082 |
|
|
struct inet6_dev *idev;
|
| 2083 |
|
|
|
| 2084 |
|
|
if ((idev = in6_dev_get(dev)) == NULL)
|
| 2085 |
|
|
continue;
|
| 2086 |
|
|
|
| 2087 |
|
|
read_lock_bh(&idev->lock);
|
| 2088 |
|
|
for (im = idev->mc_list; im; im = im->next) {
|
| 2089 |
|
|
int i;
|
| 2090 |
|
|
|
| 2091 |
|
|
len += sprintf(buffer+len,"%-4d %-15s ", dev->ifindex, dev->name);
|
| 2092 |
|
|
|
| 2093 |
|
|
for (i=0; i<16; i++)
|
| 2094 |
|
|
len += sprintf(buffer+len, "%02x", im->mca_addr.s6_addr[i]);
|
| 2095 |
|
|
|
| 2096 |
|
|
len+=sprintf(buffer+len,
|
| 2097 |
|
|
" %5d %08X %ld\n",
|
| 2098 |
|
|
im->mca_users,
|
| 2099 |
|
|
im->mca_flags,
|
| 2100 |
|
|
(im->mca_flags&MAF_TIMER_RUNNING) ? im->mca_timer.expires-jiffies : 0);
|
| 2101 |
|
|
|
| 2102 |
|
|
pos=begin+len;
|
| 2103 |
|
|
if (pos < offset) {
|
| 2104 |
|
|
len=0;
|
| 2105 |
|
|
begin=pos;
|
| 2106 |
|
|
}
|
| 2107 |
|
|
if (pos > offset+length) {
|
| 2108 |
|
|
read_unlock_bh(&idev->lock);
|
| 2109 |
|
|
in6_dev_put(idev);
|
| 2110 |
|
|
goto done;
|
| 2111 |
|
|
}
|
| 2112 |
|
|
}
|
| 2113 |
|
|
read_unlock_bh(&idev->lock);
|
| 2114 |
|
|
in6_dev_put(idev);
|
| 2115 |
|
|
}
|
| 2116 |
|
|
*eof = 1;
|
| 2117 |
|
|
|
| 2118 |
|
|
done:
|
| 2119 |
|
|
read_unlock(&dev_base_lock);
|
| 2120 |
|
|
|
| 2121 |
|
|
*start=buffer+(offset-begin);
|
| 2122 |
|
|
len-=(offset-begin);
|
| 2123 |
|
|
if(len>length)
|
| 2124 |
|
|
len=length;
|
| 2125 |
|
|
if (len<0)
|
| 2126 |
|
|
len=0;
|
| 2127 |
|
|
return len;
|
| 2128 |
|
|
}
|
| 2129 |
|
|
|
| 2130 |
|
|
static int ip6_mcf_read_proc(char *buffer, char **start, off_t offset,
|
| 2131 |
|
|
int length, int *eof, void *data)
|
| 2132 |
|
|
{
|
| 2133 |
|
|
off_t pos=0, begin=0;
|
| 2134 |
|
|
int len=0;
|
| 2135 |
|
|
int first=1;
|
| 2136 |
|
|
struct net_device *dev;
|
| 2137 |
|
|
|
| 2138 |
|
|
read_lock(&dev_base_lock);
|
| 2139 |
|
|
for (dev=dev_base; dev; dev=dev->next) {
|
| 2140 |
|
|
struct inet6_dev *idev = in6_dev_get(dev);
|
| 2141 |
|
|
struct ifmcaddr6 *imc;
|
| 2142 |
|
|
|
| 2143 |
|
|
if (idev == NULL)
|
| 2144 |
|
|
continue;
|
| 2145 |
|
|
|
| 2146 |
|
|
read_lock_bh(&idev->lock);
|
| 2147 |
|
|
|
| 2148 |
|
|
for (imc=idev->mc_list; imc; imc=imc->next) {
|
| 2149 |
|
|
struct ip6_sf_list *psf;
|
| 2150 |
|
|
unsigned long i;
|
| 2151 |
|
|
|
| 2152 |
|
|
spin_lock_bh(&imc->mca_lock);
|
| 2153 |
|
|
for (psf=imc->mca_sources; psf; psf=psf->sf_next) {
|
| 2154 |
|
|
if (first) {
|
| 2155 |
|
|
len += sprintf(buffer+len, "%3s %6s "
|
| 2156 |
|
|
"%32s %32s %6s %6s\n", "Idx",
|
| 2157 |
|
|
"Device", "Multicast Address",
|
| 2158 |
|
|
"Source Address", "INC", "EXC");
|
| 2159 |
|
|
first = 0;
|
| 2160 |
|
|
}
|
| 2161 |
|
|
len += sprintf(buffer+len,"%3d %6.6s ",
|
| 2162 |
|
|
dev->ifindex, dev->name);
|
| 2163 |
|
|
|
| 2164 |
|
|
for (i=0; i<16; i++)
|
| 2165 |
|
|
len += sprintf(buffer+len, "%02x",
|
| 2166 |
|
|
imc->mca_addr.s6_addr[i]);
|
| 2167 |
|
|
buffer[len++] = ' ';
|
| 2168 |
|
|
for (i=0; i<16; i++)
|
| 2169 |
|
|
len += sprintf(buffer+len, "%02x",
|
| 2170 |
|
|
psf->sf_addr.s6_addr[i]);
|
| 2171 |
|
|
len += sprintf(buffer+len, " %6lu %6lu\n",
|
| 2172 |
|
|
psf->sf_count[MCAST_INCLUDE],
|
| 2173 |
|
|
psf->sf_count[MCAST_EXCLUDE]);
|
| 2174 |
|
|
pos = begin+len;
|
| 2175 |
|
|
if (pos < offset) {
|
| 2176 |
|
|
len=0;
|
| 2177 |
|
|
begin=pos;
|
| 2178 |
|
|
}
|
| 2179 |
|
|
if (pos > offset+length) {
|
| 2180 |
|
|
spin_unlock_bh(&imc->mca_lock);
|
| 2181 |
|
|
read_unlock_bh(&idev->lock);
|
| 2182 |
|
|
in6_dev_put(idev);
|
| 2183 |
|
|
goto done;
|
| 2184 |
|
|
}
|
| 2185 |
|
|
}
|
| 2186 |
|
|
spin_unlock_bh(&imc->mca_lock);
|
| 2187 |
|
|
}
|
| 2188 |
|
|
read_unlock_bh(&idev->lock);
|
| 2189 |
|
|
in6_dev_put(idev);
|
| 2190 |
|
|
}
|
| 2191 |
|
|
*eof = 1;
|
| 2192 |
|
|
|
| 2193 |
|
|
done:
|
| 2194 |
|
|
read_unlock(&dev_base_lock);
|
| 2195 |
|
|
|
| 2196 |
|
|
*start=buffer+(offset-begin);
|
| 2197 |
|
|
len-=(offset-begin);
|
| 2198 |
|
|
if(len>length)
|
| 2199 |
|
|
len=length;
|
| 2200 |
|
|
if (len<0)
|
| 2201 |
|
|
len=0;
|
| 2202 |
|
|
return len;
|
| 2203 |
|
|
}
|
| 2204 |
|
|
#endif
|
| 2205 |
|
|
|
| 2206 |
|
|
int __init igmp6_init(struct net_proto_family *ops)
|
| 2207 |
|
|
{
|
| 2208 |
|
|
struct sock *sk;
|
| 2209 |
|
|
int err;
|
| 2210 |
|
|
|
| 2211 |
|
|
igmp6_socket = sock_alloc();
|
| 2212 |
|
|
if (igmp6_socket == NULL) {
|
| 2213 |
|
|
printk(KERN_ERR
|
| 2214 |
|
|
"Failed to create the IGMP6 control socket.\n");
|
| 2215 |
|
|
return -1;
|
| 2216 |
|
|
}
|
| 2217 |
|
|
igmp6_socket->inode->i_uid = 0;
|
| 2218 |
|
|
igmp6_socket->inode->i_gid = 0;
|
| 2219 |
|
|
igmp6_socket->type = SOCK_RAW;
|
| 2220 |
|
|
|
| 2221 |
|
|
if((err = ops->create(igmp6_socket, IPPROTO_ICMPV6)) < 0) {
|
| 2222 |
|
|
printk(KERN_DEBUG
|
| 2223 |
|
|
"Failed to initialize the IGMP6 control socket (err %d).\n",
|
| 2224 |
|
|
err);
|
| 2225 |
|
|
sock_release(igmp6_socket);
|
| 2226 |
|
|
igmp6_socket = NULL; /* For safety. */
|
| 2227 |
|
|
return err;
|
| 2228 |
|
|
}
|
| 2229 |
|
|
|
| 2230 |
|
|
sk = igmp6_socket->sk;
|
| 2231 |
|
|
sk->allocation = GFP_ATOMIC;
|
| 2232 |
|
|
sk->prot->unhash(sk);
|
| 2233 |
|
|
|
| 2234 |
|
|
sk->net_pinfo.af_inet6.hop_limit = 1;
|
| 2235 |
|
|
#ifdef CONFIG_PROC_FS
|
| 2236 |
|
|
create_proc_read_entry("net/igmp6", 0, 0, igmp6_read_proc, NULL);
|
| 2237 |
|
|
create_proc_read_entry("net/mcfilter6", 0, 0, ip6_mcf_read_proc, NULL);
|
| 2238 |
|
|
#endif
|
| 2239 |
|
|
|
| 2240 |
|
|
return 0;
|
| 2241 |
|
|
}
|
| 2242 |
|
|
|
| 2243 |
|
|
void igmp6_cleanup(void)
|
| 2244 |
|
|
{
|
| 2245 |
|
|
sock_release(igmp6_socket);
|
| 2246 |
|
|
igmp6_socket = NULL; /* for safety */
|
| 2247 |
|
|
#ifdef CONFIG_PROC_FS
|
| 2248 |
|
|
remove_proc_entry("net/igmp6", 0);
|
| 2249 |
|
|
#endif
|
| 2250 |
|
|
}
|
