8b3a70058b
This removes more unneeded casts on the return value for kmalloc(), sock_kmalloc(), and vmalloc(). Signed-off-by: Kris Katterjohn <kjak@users.sourceforge.net> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2642 lines
62 KiB
C
2642 lines
62 KiB
C
/*
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* Multicast support for IPv6
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* Linux INET6 implementation
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*
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* Authors:
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* Pedro Roque <roque@di.fc.ul.pt>
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*
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* $Id: mcast.c,v 1.40 2002/02/08 03:57:19 davem Exp $
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*
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* Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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/* Changes:
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*
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* yoshfuji : fix format of router-alert option
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* YOSHIFUJI Hideaki @USAGI:
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* Fixed source address for MLD message based on
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* <draft-ietf-magma-mld-source-05.txt>.
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* YOSHIFUJI Hideaki @USAGI:
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* - Ignore Queries for invalid addresses.
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* - MLD for link-local addresses.
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* David L Stevens <dlstevens@us.ibm.com>:
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* - MLDv2 support
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/socket.h>
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#include <linux/sockios.h>
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#include <linux/jiffies.h>
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#include <linux/times.h>
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#include <linux/net.h>
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <linux/netdevice.h>
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#include <linux/if_arp.h>
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#include <linux/route.h>
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#include <linux/init.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/netfilter.h>
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#include <linux/netfilter_ipv6.h>
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#include <net/sock.h>
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#include <net/snmp.h>
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#include <net/ipv6.h>
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#include <net/protocol.h>
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#include <net/if_inet6.h>
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#include <net/ndisc.h>
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#include <net/addrconf.h>
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#include <net/ip6_route.h>
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#include <net/ip6_checksum.h>
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/* Set to 3 to get tracing... */
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#define MCAST_DEBUG 2
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#if MCAST_DEBUG >= 3
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#define MDBG(x) printk x
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#else
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#define MDBG(x)
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#endif
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/*
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* These header formats should be in a separate include file, but icmpv6.h
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* doesn't have in6_addr defined in all cases, there is no __u128, and no
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* other files reference these.
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*
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* +-DLS 4/14/03
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*/
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/* Multicast Listener Discovery version 2 headers */
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struct mld2_grec {
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__u8 grec_type;
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__u8 grec_auxwords;
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__u16 grec_nsrcs;
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struct in6_addr grec_mca;
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struct in6_addr grec_src[0];
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};
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struct mld2_report {
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__u8 type;
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__u8 resv1;
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__u16 csum;
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__u16 resv2;
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__u16 ngrec;
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struct mld2_grec grec[0];
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};
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struct mld2_query {
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__u8 type;
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__u8 code;
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__u16 csum;
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__u16 mrc;
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__u16 resv1;
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struct in6_addr mca;
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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__u8 qrv:3,
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suppress:1,
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resv2:4;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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__u8 resv2:4,
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suppress:1,
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qrv:3;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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__u8 qqic;
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__u16 nsrcs;
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struct in6_addr srcs[0];
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};
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static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
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/* Big mc list lock for all the sockets */
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static DEFINE_RWLOCK(ipv6_sk_mc_lock);
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static struct socket *igmp6_socket;
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int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
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static void igmp6_join_group(struct ifmcaddr6 *ma);
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static void igmp6_leave_group(struct ifmcaddr6 *ma);
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static void igmp6_timer_handler(unsigned long data);
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static void mld_gq_timer_expire(unsigned long data);
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static void mld_ifc_timer_expire(unsigned long data);
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static void mld_ifc_event(struct inet6_dev *idev);
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static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc);
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static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *addr);
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static void mld_clear_delrec(struct inet6_dev *idev);
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static int sf_setstate(struct ifmcaddr6 *pmc);
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static void sf_markstate(struct ifmcaddr6 *pmc);
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static void ip6_mc_clear_src(struct ifmcaddr6 *pmc);
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static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca,
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int sfmode, int sfcount, struct in6_addr *psfsrc,
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int delta);
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static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca,
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int sfmode, int sfcount, struct in6_addr *psfsrc,
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int delta);
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static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
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struct inet6_dev *idev);
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#define IGMP6_UNSOLICITED_IVAL (10*HZ)
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#define MLD_QRV_DEFAULT 2
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#define MLD_V1_SEEN(idev) (ipv6_devconf.force_mld_version == 1 || \
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(idev)->cnf.force_mld_version == 1 || \
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((idev)->mc_v1_seen && \
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time_before(jiffies, (idev)->mc_v1_seen)))
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#define MLDV2_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
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#define MLDV2_EXP(thresh, nbmant, nbexp, value) \
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((value) < (thresh) ? (value) : \
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((MLDV2_MASK(value, nbmant) | (1<<(nbmant))) << \
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(MLDV2_MASK((value) >> (nbmant), nbexp) + (nbexp))))
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#define MLDV2_QQIC(value) MLDV2_EXP(0x80, 4, 3, value)
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#define MLDV2_MRC(value) MLDV2_EXP(0x8000, 12, 3, value)
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#define IPV6_MLD_MAX_MSF 64
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int sysctl_mld_max_msf = IPV6_MLD_MAX_MSF;
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/*
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* socket join on multicast group
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*/
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int ipv6_sock_mc_join(struct sock *sk, int ifindex, struct in6_addr *addr)
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{
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struct net_device *dev = NULL;
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struct ipv6_mc_socklist *mc_lst;
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struct ipv6_pinfo *np = inet6_sk(sk);
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int err;
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if (!ipv6_addr_is_multicast(addr))
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return -EINVAL;
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read_lock_bh(&ipv6_sk_mc_lock);
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for (mc_lst=np->ipv6_mc_list; mc_lst; mc_lst=mc_lst->next) {
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if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
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ipv6_addr_equal(&mc_lst->addr, addr)) {
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read_unlock_bh(&ipv6_sk_mc_lock);
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return -EADDRINUSE;
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}
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}
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read_unlock_bh(&ipv6_sk_mc_lock);
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mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);
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if (mc_lst == NULL)
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return -ENOMEM;
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mc_lst->next = NULL;
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ipv6_addr_copy(&mc_lst->addr, addr);
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if (ifindex == 0) {
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struct rt6_info *rt;
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rt = rt6_lookup(addr, NULL, 0, 0);
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if (rt) {
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dev = rt->rt6i_dev;
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dev_hold(dev);
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dst_release(&rt->u.dst);
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}
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} else
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dev = dev_get_by_index(ifindex);
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if (dev == NULL) {
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sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
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return -ENODEV;
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}
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mc_lst->ifindex = dev->ifindex;
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mc_lst->sfmode = MCAST_EXCLUDE;
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rwlock_init(&mc_lst->sflock);
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mc_lst->sflist = NULL;
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/*
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* now add/increase the group membership on the device
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*/
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err = ipv6_dev_mc_inc(dev, addr);
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if (err) {
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sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
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dev_put(dev);
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return err;
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}
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write_lock_bh(&ipv6_sk_mc_lock);
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mc_lst->next = np->ipv6_mc_list;
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np->ipv6_mc_list = mc_lst;
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write_unlock_bh(&ipv6_sk_mc_lock);
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dev_put(dev);
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return 0;
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}
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/*
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* socket leave on multicast group
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*/
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int ipv6_sock_mc_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
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{
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struct ipv6_pinfo *np = inet6_sk(sk);
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struct ipv6_mc_socklist *mc_lst, **lnk;
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write_lock_bh(&ipv6_sk_mc_lock);
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for (lnk = &np->ipv6_mc_list; (mc_lst = *lnk) !=NULL ; lnk = &mc_lst->next) {
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if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
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ipv6_addr_equal(&mc_lst->addr, addr)) {
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struct net_device *dev;
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*lnk = mc_lst->next;
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write_unlock_bh(&ipv6_sk_mc_lock);
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if ((dev = dev_get_by_index(mc_lst->ifindex)) != NULL) {
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struct inet6_dev *idev = in6_dev_get(dev);
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if (idev) {
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(void) ip6_mc_leave_src(sk,mc_lst,idev);
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__ipv6_dev_mc_dec(idev, &mc_lst->addr);
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in6_dev_put(idev);
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}
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dev_put(dev);
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}
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sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
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return 0;
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}
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}
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write_unlock_bh(&ipv6_sk_mc_lock);
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return -EADDRNOTAVAIL;
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}
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static struct inet6_dev *ip6_mc_find_dev(struct in6_addr *group, int ifindex)
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{
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struct net_device *dev = NULL;
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struct inet6_dev *idev = NULL;
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if (ifindex == 0) {
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struct rt6_info *rt;
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rt = rt6_lookup(group, NULL, 0, 0);
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if (rt) {
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dev = rt->rt6i_dev;
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dev_hold(dev);
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dst_release(&rt->u.dst);
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}
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} else
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dev = dev_get_by_index(ifindex);
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if (!dev)
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return NULL;
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idev = in6_dev_get(dev);
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if (!idev) {
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dev_put(dev);
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return NULL;
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}
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read_lock_bh(&idev->lock);
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if (idev->dead) {
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read_unlock_bh(&idev->lock);
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in6_dev_put(idev);
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dev_put(dev);
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return NULL;
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}
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return idev;
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}
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void ipv6_sock_mc_close(struct sock *sk)
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{
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struct ipv6_pinfo *np = inet6_sk(sk);
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struct ipv6_mc_socklist *mc_lst;
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write_lock_bh(&ipv6_sk_mc_lock);
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while ((mc_lst = np->ipv6_mc_list) != NULL) {
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struct net_device *dev;
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np->ipv6_mc_list = mc_lst->next;
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write_unlock_bh(&ipv6_sk_mc_lock);
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dev = dev_get_by_index(mc_lst->ifindex);
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if (dev) {
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struct inet6_dev *idev = in6_dev_get(dev);
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if (idev) {
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(void) ip6_mc_leave_src(sk, mc_lst, idev);
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__ipv6_dev_mc_dec(idev, &mc_lst->addr);
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in6_dev_put(idev);
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}
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dev_put(dev);
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}
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sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
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write_lock_bh(&ipv6_sk_mc_lock);
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}
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write_unlock_bh(&ipv6_sk_mc_lock);
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}
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int ip6_mc_source(int add, int omode, struct sock *sk,
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struct group_source_req *pgsr)
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{
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struct in6_addr *source, *group;
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struct ipv6_mc_socklist *pmc;
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struct net_device *dev;
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struct inet6_dev *idev;
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struct ipv6_pinfo *inet6 = inet6_sk(sk);
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struct ip6_sf_socklist *psl;
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int i, j, rv;
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int leavegroup = 0;
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int pmclocked = 0;
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int err;
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if (pgsr->gsr_group.ss_family != AF_INET6 ||
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pgsr->gsr_source.ss_family != AF_INET6)
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return -EINVAL;
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source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
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group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
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if (!ipv6_addr_is_multicast(group))
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return -EINVAL;
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|
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idev = ip6_mc_find_dev(group, pgsr->gsr_interface);
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if (!idev)
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return -ENODEV;
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dev = idev->dev;
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err = -EADDRNOTAVAIL;
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|
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read_lock_bh(&ipv6_sk_mc_lock);
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for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
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if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
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continue;
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if (ipv6_addr_equal(&pmc->addr, group))
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break;
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}
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if (!pmc) { /* must have a prior join */
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err = -EINVAL;
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goto done;
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}
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/* if a source filter was set, must be the same mode as before */
|
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if (pmc->sflist) {
|
|
if (pmc->sfmode != omode) {
|
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err = -EINVAL;
|
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goto done;
|
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}
|
|
} else if (pmc->sfmode != omode) {
|
|
/* allow mode switches for empty-set filters */
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ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
|
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ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
|
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pmc->sfmode = omode;
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}
|
|
|
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write_lock_bh(&pmc->sflock);
|
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pmclocked = 1;
|
|
|
|
psl = pmc->sflist;
|
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if (!add) {
|
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if (!psl)
|
|
goto done; /* err = -EADDRNOTAVAIL */
|
|
rv = !0;
|
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for (i=0; i<psl->sl_count; i++) {
|
|
rv = memcmp(&psl->sl_addr[i], source,
|
|
sizeof(struct in6_addr));
|
|
if (rv == 0)
|
|
break;
|
|
}
|
|
if (rv) /* source not found */
|
|
goto done; /* err = -EADDRNOTAVAIL */
|
|
|
|
/* special case - (INCLUDE, empty) == LEAVE_GROUP */
|
|
if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
|
|
leavegroup = 1;
|
|
goto done;
|
|
}
|
|
|
|
/* update the interface filter */
|
|
ip6_mc_del_src(idev, group, omode, 1, source, 1);
|
|
|
|
for (j=i+1; j<psl->sl_count; j++)
|
|
psl->sl_addr[j-1] = psl->sl_addr[j];
|
|
psl->sl_count--;
|
|
err = 0;
|
|
goto done;
|
|
}
|
|
/* else, add a new source to the filter */
|
|
|
|
if (psl && psl->sl_count >= sysctl_mld_max_msf) {
|
|
err = -ENOBUFS;
|
|
goto done;
|
|
}
|
|
if (!psl || psl->sl_count == psl->sl_max) {
|
|
struct ip6_sf_socklist *newpsl;
|
|
int count = IP6_SFBLOCK;
|
|
|
|
if (psl)
|
|
count += psl->sl_max;
|
|
newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC);
|
|
if (!newpsl) {
|
|
err = -ENOBUFS;
|
|
goto done;
|
|
}
|
|
newpsl->sl_max = count;
|
|
newpsl->sl_count = count - IP6_SFBLOCK;
|
|
if (psl) {
|
|
for (i=0; i<psl->sl_count; i++)
|
|
newpsl->sl_addr[i] = psl->sl_addr[i];
|
|
sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
|
|
}
|
|
pmc->sflist = psl = newpsl;
|
|
}
|
|
rv = 1; /* > 0 for insert logic below if sl_count is 0 */
|
|
for (i=0; i<psl->sl_count; i++) {
|
|
rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr));
|
|
if (rv == 0)
|
|
break;
|
|
}
|
|
if (rv == 0) /* address already there is an error */
|
|
goto done;
|
|
for (j=psl->sl_count-1; j>=i; j--)
|
|
psl->sl_addr[j+1] = psl->sl_addr[j];
|
|
psl->sl_addr[i] = *source;
|
|
psl->sl_count++;
|
|
err = 0;
|
|
/* update the interface list */
|
|
ip6_mc_add_src(idev, group, omode, 1, source, 1);
|
|
done:
|
|
if (pmclocked)
|
|
write_unlock_bh(&pmc->sflock);
|
|
read_unlock_bh(&ipv6_sk_mc_lock);
|
|
read_unlock_bh(&idev->lock);
|
|
in6_dev_put(idev);
|
|
dev_put(dev);
|
|
if (leavegroup)
|
|
return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
|
|
return err;
|
|
}
|
|
|
|
int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
|
|
{
|
|
struct in6_addr *group;
|
|
struct ipv6_mc_socklist *pmc;
|
|
struct net_device *dev;
|
|
struct inet6_dev *idev;
|
|
struct ipv6_pinfo *inet6 = inet6_sk(sk);
|
|
struct ip6_sf_socklist *newpsl, *psl;
|
|
int leavegroup = 0;
|
|
int i, err;
|
|
|
|
group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
|
|
|
|
if (!ipv6_addr_is_multicast(group))
|
|
return -EINVAL;
|
|
if (gsf->gf_fmode != MCAST_INCLUDE &&
|
|
gsf->gf_fmode != MCAST_EXCLUDE)
|
|
return -EINVAL;
|
|
|
|
idev = ip6_mc_find_dev(group, gsf->gf_interface);
|
|
|
|
if (!idev)
|
|
return -ENODEV;
|
|
dev = idev->dev;
|
|
|
|
err = 0;
|
|
read_lock_bh(&ipv6_sk_mc_lock);
|
|
|
|
if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
|
|
leavegroup = 1;
|
|
goto done;
|
|
}
|
|
|
|
for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
|
|
if (pmc->ifindex != gsf->gf_interface)
|
|
continue;
|
|
if (ipv6_addr_equal(&pmc->addr, group))
|
|
break;
|
|
}
|
|
if (!pmc) { /* must have a prior join */
|
|
err = -EINVAL;
|
|
goto done;
|
|
}
|
|
if (gsf->gf_numsrc) {
|
|
newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc),
|
|
GFP_ATOMIC);
|
|
if (!newpsl) {
|
|
err = -ENOBUFS;
|
|
goto done;
|
|
}
|
|
newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
|
|
for (i=0; i<newpsl->sl_count; ++i) {
|
|
struct sockaddr_in6 *psin6;
|
|
|
|
psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
|
|
newpsl->sl_addr[i] = psin6->sin6_addr;
|
|
}
|
|
err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
|
|
newpsl->sl_count, newpsl->sl_addr, 0);
|
|
if (err) {
|
|
sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
|
|
goto done;
|
|
}
|
|
} else {
|
|
newpsl = NULL;
|
|
(void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
|
|
}
|
|
|
|
write_lock_bh(&pmc->sflock);
|
|
psl = pmc->sflist;
|
|
if (psl) {
|
|
(void) ip6_mc_del_src(idev, group, pmc->sfmode,
|
|
psl->sl_count, psl->sl_addr, 0);
|
|
sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
|
|
} else
|
|
(void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
|
|
pmc->sflist = newpsl;
|
|
pmc->sfmode = gsf->gf_fmode;
|
|
write_unlock_bh(&pmc->sflock);
|
|
err = 0;
|
|
done:
|
|
read_unlock_bh(&ipv6_sk_mc_lock);
|
|
read_unlock_bh(&idev->lock);
|
|
in6_dev_put(idev);
|
|
dev_put(dev);
|
|
if (leavegroup)
|
|
err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
|
|
return err;
|
|
}
|
|
|
|
int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
|
|
struct group_filter __user *optval, int __user *optlen)
|
|
{
|
|
int err, i, count, copycount;
|
|
struct in6_addr *group;
|
|
struct ipv6_mc_socklist *pmc;
|
|
struct inet6_dev *idev;
|
|
struct net_device *dev;
|
|
struct ipv6_pinfo *inet6 = inet6_sk(sk);
|
|
struct ip6_sf_socklist *psl;
|
|
|
|
group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
|
|
|
|
if (!ipv6_addr_is_multicast(group))
|
|
return -EINVAL;
|
|
|
|
idev = ip6_mc_find_dev(group, gsf->gf_interface);
|
|
|
|
if (!idev)
|
|
return -ENODEV;
|
|
|
|
dev = idev->dev;
|
|
|
|
err = -EADDRNOTAVAIL;
|
|
/*
|
|
* changes to the ipv6_mc_list require the socket lock and
|
|
* a read lock on ip6_sk_mc_lock. We have the socket lock,
|
|
* so reading the list is safe.
|
|
*/
|
|
|
|
for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
|
|
if (pmc->ifindex != gsf->gf_interface)
|
|
continue;
|
|
if (ipv6_addr_equal(group, &pmc->addr))
|
|
break;
|
|
}
|
|
if (!pmc) /* must have a prior join */
|
|
goto done;
|
|
gsf->gf_fmode = pmc->sfmode;
|
|
psl = pmc->sflist;
|
|
count = psl ? psl->sl_count : 0;
|
|
read_unlock_bh(&idev->lock);
|
|
in6_dev_put(idev);
|
|
dev_put(dev);
|
|
|
|
copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
|
|
gsf->gf_numsrc = count;
|
|
if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
|
|
copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
|
|
return -EFAULT;
|
|
}
|
|
/* changes to psl require the socket lock, a read lock on
|
|
* on ipv6_sk_mc_lock and a write lock on pmc->sflock. We
|
|
* have the socket lock, so reading here is safe.
|
|
*/
|
|
for (i=0; i<copycount; i++) {
|
|
struct sockaddr_in6 *psin6;
|
|
struct sockaddr_storage ss;
|
|
|
|
psin6 = (struct sockaddr_in6 *)&ss;
|
|
memset(&ss, 0, sizeof(ss));
|
|
psin6->sin6_family = AF_INET6;
|
|
psin6->sin6_addr = psl->sl_addr[i];
|
|
if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss)))
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
done:
|
|
read_unlock_bh(&idev->lock);
|
|
in6_dev_put(idev);
|
|
dev_put(dev);
|
|
return err;
|
|
}
|
|
|
|
int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
|
|
struct in6_addr *src_addr)
|
|
{
|
|
struct ipv6_pinfo *np = inet6_sk(sk);
|
|
struct ipv6_mc_socklist *mc;
|
|
struct ip6_sf_socklist *psl;
|
|
int rv = 1;
|
|
|
|
read_lock(&ipv6_sk_mc_lock);
|
|
for (mc = np->ipv6_mc_list; mc; mc = mc->next) {
|
|
if (ipv6_addr_equal(&mc->addr, mc_addr))
|
|
break;
|
|
}
|
|
if (!mc) {
|
|
read_unlock(&ipv6_sk_mc_lock);
|
|
return 1;
|
|
}
|
|
read_lock(&mc->sflock);
|
|
psl = mc->sflist;
|
|
if (!psl) {
|
|
rv = mc->sfmode == MCAST_EXCLUDE;
|
|
} else {
|
|
int i;
|
|
|
|
for (i=0; i<psl->sl_count; i++) {
|
|
if (ipv6_addr_equal(&psl->sl_addr[i], src_addr))
|
|
break;
|
|
}
|
|
if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
|
|
rv = 0;
|
|
if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
|
|
rv = 0;
|
|
}
|
|
read_unlock(&mc->sflock);
|
|
read_unlock(&ipv6_sk_mc_lock);
|
|
|
|
return rv;
|
|
}
|
|
|
|
static void ma_put(struct ifmcaddr6 *mc)
|
|
{
|
|
if (atomic_dec_and_test(&mc->mca_refcnt)) {
|
|
in6_dev_put(mc->idev);
|
|
kfree(mc);
|
|
}
|
|
}
|
|
|
|
static void igmp6_group_added(struct ifmcaddr6 *mc)
|
|
{
|
|
struct net_device *dev = mc->idev->dev;
|
|
char buf[MAX_ADDR_LEN];
|
|
|
|
spin_lock_bh(&mc->mca_lock);
|
|
if (!(mc->mca_flags&MAF_LOADED)) {
|
|
mc->mca_flags |= MAF_LOADED;
|
|
if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
|
|
dev_mc_add(dev, buf, dev->addr_len, 0);
|
|
}
|
|
spin_unlock_bh(&mc->mca_lock);
|
|
|
|
if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
|
|
return;
|
|
|
|
if (MLD_V1_SEEN(mc->idev)) {
|
|
igmp6_join_group(mc);
|
|
return;
|
|
}
|
|
/* else v2 */
|
|
|
|
mc->mca_crcount = mc->idev->mc_qrv;
|
|
mld_ifc_event(mc->idev);
|
|
}
|
|
|
|
static void igmp6_group_dropped(struct ifmcaddr6 *mc)
|
|
{
|
|
struct net_device *dev = mc->idev->dev;
|
|
char buf[MAX_ADDR_LEN];
|
|
|
|
spin_lock_bh(&mc->mca_lock);
|
|
if (mc->mca_flags&MAF_LOADED) {
|
|
mc->mca_flags &= ~MAF_LOADED;
|
|
if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
|
|
dev_mc_delete(dev, buf, dev->addr_len, 0);
|
|
}
|
|
|
|
if (mc->mca_flags & MAF_NOREPORT)
|
|
goto done;
|
|
spin_unlock_bh(&mc->mca_lock);
|
|
|
|
if (!mc->idev->dead)
|
|
igmp6_leave_group(mc);
|
|
|
|
spin_lock_bh(&mc->mca_lock);
|
|
if (del_timer(&mc->mca_timer))
|
|
atomic_dec(&mc->mca_refcnt);
|
|
done:
|
|
ip6_mc_clear_src(mc);
|
|
spin_unlock_bh(&mc->mca_lock);
|
|
}
|
|
|
|
/*
|
|
* deleted ifmcaddr6 manipulation
|
|
*/
|
|
static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
|
|
{
|
|
struct ifmcaddr6 *pmc;
|
|
|
|
/* this is an "ifmcaddr6" for convenience; only the fields below
|
|
* are actually used. In particular, the refcnt and users are not
|
|
* used for management of the delete list. Using the same structure
|
|
* for deleted items allows change reports to use common code with
|
|
* non-deleted or query-response MCA's.
|
|
*/
|
|
pmc = kmalloc(sizeof(*pmc), GFP_ATOMIC);
|
|
if (!pmc)
|
|
return;
|
|
memset(pmc, 0, sizeof(*pmc));
|
|
spin_lock_bh(&im->mca_lock);
|
|
spin_lock_init(&pmc->mca_lock);
|
|
pmc->idev = im->idev;
|
|
in6_dev_hold(idev);
|
|
pmc->mca_addr = im->mca_addr;
|
|
pmc->mca_crcount = idev->mc_qrv;
|
|
pmc->mca_sfmode = im->mca_sfmode;
|
|
if (pmc->mca_sfmode == MCAST_INCLUDE) {
|
|
struct ip6_sf_list *psf;
|
|
|
|
pmc->mca_tomb = im->mca_tomb;
|
|
pmc->mca_sources = im->mca_sources;
|
|
im->mca_tomb = im->mca_sources = NULL;
|
|
for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
|
|
psf->sf_crcount = pmc->mca_crcount;
|
|
}
|
|
spin_unlock_bh(&im->mca_lock);
|
|
|
|
write_lock_bh(&idev->mc_lock);
|
|
pmc->next = idev->mc_tomb;
|
|
idev->mc_tomb = pmc;
|
|
write_unlock_bh(&idev->mc_lock);
|
|
}
|
|
|
|
static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca)
|
|
{
|
|
struct ifmcaddr6 *pmc, *pmc_prev;
|
|
struct ip6_sf_list *psf, *psf_next;
|
|
|
|
write_lock_bh(&idev->mc_lock);
|
|
pmc_prev = NULL;
|
|
for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
|
|
if (ipv6_addr_equal(&pmc->mca_addr, pmca))
|
|
break;
|
|
pmc_prev = pmc;
|
|
}
|
|
if (pmc) {
|
|
if (pmc_prev)
|
|
pmc_prev->next = pmc->next;
|
|
else
|
|
idev->mc_tomb = pmc->next;
|
|
}
|
|
write_unlock_bh(&idev->mc_lock);
|
|
if (pmc) {
|
|
for (psf=pmc->mca_tomb; psf; psf=psf_next) {
|
|
psf_next = psf->sf_next;
|
|
kfree(psf);
|
|
}
|
|
in6_dev_put(pmc->idev);
|
|
kfree(pmc);
|
|
}
|
|
}
|
|
|
|
static void mld_clear_delrec(struct inet6_dev *idev)
|
|
{
|
|
struct ifmcaddr6 *pmc, *nextpmc;
|
|
|
|
write_lock_bh(&idev->mc_lock);
|
|
pmc = idev->mc_tomb;
|
|
idev->mc_tomb = NULL;
|
|
write_unlock_bh(&idev->mc_lock);
|
|
|
|
for (; pmc; pmc = nextpmc) {
|
|
nextpmc = pmc->next;
|
|
ip6_mc_clear_src(pmc);
|
|
in6_dev_put(pmc->idev);
|
|
kfree(pmc);
|
|
}
|
|
|
|
/* clear dead sources, too */
|
|
read_lock_bh(&idev->lock);
|
|
for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
|
|
struct ip6_sf_list *psf, *psf_next;
|
|
|
|
spin_lock_bh(&pmc->mca_lock);
|
|
psf = pmc->mca_tomb;
|
|
pmc->mca_tomb = NULL;
|
|
spin_unlock_bh(&pmc->mca_lock);
|
|
for (; psf; psf=psf_next) {
|
|
psf_next = psf->sf_next;
|
|
kfree(psf);
|
|
}
|
|
}
|
|
read_unlock_bh(&idev->lock);
|
|
}
|
|
|
|
|
|
/*
|
|
* device multicast group inc (add if not found)
|
|
*/
|
|
int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr)
|
|
{
|
|
struct ifmcaddr6 *mc;
|
|
struct inet6_dev *idev;
|
|
|
|
idev = in6_dev_get(dev);
|
|
|
|
if (idev == NULL)
|
|
return -EINVAL;
|
|
|
|
write_lock_bh(&idev->lock);
|
|
if (idev->dead) {
|
|
write_unlock_bh(&idev->lock);
|
|
in6_dev_put(idev);
|
|
return -ENODEV;
|
|
}
|
|
|
|
for (mc = idev->mc_list; mc; mc = mc->next) {
|
|
if (ipv6_addr_equal(&mc->mca_addr, addr)) {
|
|
mc->mca_users++;
|
|
write_unlock_bh(&idev->lock);
|
|
ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
|
|
NULL, 0);
|
|
in6_dev_put(idev);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* not found: create a new one.
|
|
*/
|
|
|
|
mc = kmalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
|
|
|
|
if (mc == NULL) {
|
|
write_unlock_bh(&idev->lock);
|
|
in6_dev_put(idev);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
memset(mc, 0, sizeof(struct ifmcaddr6));
|
|
init_timer(&mc->mca_timer);
|
|
mc->mca_timer.function = igmp6_timer_handler;
|
|
mc->mca_timer.data = (unsigned long) mc;
|
|
|
|
ipv6_addr_copy(&mc->mca_addr, addr);
|
|
mc->idev = idev;
|
|
mc->mca_users = 1;
|
|
/* mca_stamp should be updated upon changes */
|
|
mc->mca_cstamp = mc->mca_tstamp = jiffies;
|
|
atomic_set(&mc->mca_refcnt, 2);
|
|
spin_lock_init(&mc->mca_lock);
|
|
|
|
/* initial mode is (EX, empty) */
|
|
mc->mca_sfmode = MCAST_EXCLUDE;
|
|
mc->mca_sfcount[MCAST_EXCLUDE] = 1;
|
|
|
|
if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
|
|
IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
|
|
mc->mca_flags |= MAF_NOREPORT;
|
|
|
|
mc->next = idev->mc_list;
|
|
idev->mc_list = mc;
|
|
write_unlock_bh(&idev->lock);
|
|
|
|
mld_del_delrec(idev, &mc->mca_addr);
|
|
igmp6_group_added(mc);
|
|
ma_put(mc);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* device multicast group del
|
|
*/
|
|
int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr)
|
|
{
|
|
struct ifmcaddr6 *ma, **map;
|
|
|
|
write_lock_bh(&idev->lock);
|
|
for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
|
|
if (ipv6_addr_equal(&ma->mca_addr, addr)) {
|
|
if (--ma->mca_users == 0) {
|
|
*map = ma->next;
|
|
write_unlock_bh(&idev->lock);
|
|
|
|
igmp6_group_dropped(ma);
|
|
|
|
ma_put(ma);
|
|
return 0;
|
|
}
|
|
write_unlock_bh(&idev->lock);
|
|
return 0;
|
|
}
|
|
}
|
|
write_unlock_bh(&idev->lock);
|
|
|
|
return -ENOENT;
|
|
}
|
|
|
|
int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr)
|
|
{
|
|
struct inet6_dev *idev = in6_dev_get(dev);
|
|
int err;
|
|
|
|
if (!idev)
|
|
return -ENODEV;
|
|
|
|
err = __ipv6_dev_mc_dec(idev, addr);
|
|
|
|
in6_dev_put(idev);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* identify MLD packets for MLD filter exceptions
|
|
*/
|
|
int ipv6_is_mld(struct sk_buff *skb, int nexthdr)
|
|
{
|
|
struct icmp6hdr *pic;
|
|
|
|
if (nexthdr != IPPROTO_ICMPV6)
|
|
return 0;
|
|
|
|
if (!pskb_may_pull(skb, sizeof(struct icmp6hdr)))
|
|
return 0;
|
|
|
|
pic = (struct icmp6hdr *)skb->h.raw;
|
|
|
|
switch (pic->icmp6_type) {
|
|
case ICMPV6_MGM_QUERY:
|
|
case ICMPV6_MGM_REPORT:
|
|
case ICMPV6_MGM_REDUCTION:
|
|
case ICMPV6_MLD2_REPORT:
|
|
return 1;
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* check if the interface/address pair is valid
|
|
*/
|
|
int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
|
|
struct in6_addr *src_addr)
|
|
{
|
|
struct inet6_dev *idev;
|
|
struct ifmcaddr6 *mc;
|
|
int rv = 0;
|
|
|
|
idev = in6_dev_get(dev);
|
|
if (idev) {
|
|
read_lock_bh(&idev->lock);
|
|
for (mc = idev->mc_list; mc; mc=mc->next) {
|
|
if (ipv6_addr_equal(&mc->mca_addr, group))
|
|
break;
|
|
}
|
|
if (mc) {
|
|
if (src_addr && !ipv6_addr_any(src_addr)) {
|
|
struct ip6_sf_list *psf;
|
|
|
|
spin_lock_bh(&mc->mca_lock);
|
|
for (psf=mc->mca_sources;psf;psf=psf->sf_next) {
|
|
if (ipv6_addr_equal(&psf->sf_addr, src_addr))
|
|
break;
|
|
}
|
|
if (psf)
|
|
rv = psf->sf_count[MCAST_INCLUDE] ||
|
|
psf->sf_count[MCAST_EXCLUDE] !=
|
|
mc->mca_sfcount[MCAST_EXCLUDE];
|
|
else
|
|
rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0;
|
|
spin_unlock_bh(&mc->mca_lock);
|
|
} else
|
|
rv = 1; /* don't filter unspecified source */
|
|
}
|
|
read_unlock_bh(&idev->lock);
|
|
in6_dev_put(idev);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
static void mld_gq_start_timer(struct inet6_dev *idev)
|
|
{
|
|
int tv = net_random() % idev->mc_maxdelay;
|
|
|
|
idev->mc_gq_running = 1;
|
|
if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
|
|
in6_dev_hold(idev);
|
|
}
|
|
|
|
static void mld_ifc_start_timer(struct inet6_dev *idev, int delay)
|
|
{
|
|
int tv = net_random() % delay;
|
|
|
|
if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
|
|
in6_dev_hold(idev);
|
|
}
|
|
|
|
/*
|
|
* IGMP handling (alias multicast ICMPv6 messages)
|
|
*/
|
|
|
|
static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
|
|
{
|
|
unsigned long delay = resptime;
|
|
|
|
/* Do not start timer for these addresses */
|
|
if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
|
|
IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
|
|
return;
|
|
|
|
if (del_timer(&ma->mca_timer)) {
|
|
atomic_dec(&ma->mca_refcnt);
|
|
delay = ma->mca_timer.expires - jiffies;
|
|
}
|
|
|
|
if (delay >= resptime) {
|
|
if (resptime)
|
|
delay = net_random() % resptime;
|
|
else
|
|
delay = 1;
|
|
}
|
|
ma->mca_timer.expires = jiffies + delay;
|
|
if (!mod_timer(&ma->mca_timer, jiffies + delay))
|
|
atomic_inc(&ma->mca_refcnt);
|
|
ma->mca_flags |= MAF_TIMER_RUNNING;
|
|
}
|
|
|
|
/* mark EXCLUDE-mode sources */
|
|
static int mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs,
|
|
struct in6_addr *srcs)
|
|
{
|
|
struct ip6_sf_list *psf;
|
|
int i, scount;
|
|
|
|
scount = 0;
|
|
for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
|
|
if (scount == nsrcs)
|
|
break;
|
|
for (i=0; i<nsrcs; i++) {
|
|
/* skip inactive filters */
|
|
if (pmc->mca_sfcount[MCAST_INCLUDE] ||
|
|
pmc->mca_sfcount[MCAST_EXCLUDE] !=
|
|
psf->sf_count[MCAST_EXCLUDE])
|
|
continue;
|
|
if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
|
|
scount++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
pmc->mca_flags &= ~MAF_GSQUERY;
|
|
if (scount == nsrcs) /* all sources excluded */
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static int mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
|
|
struct in6_addr *srcs)
|
|
{
|
|
struct ip6_sf_list *psf;
|
|
int i, scount;
|
|
|
|
if (pmc->mca_sfmode == MCAST_EXCLUDE)
|
|
return mld_xmarksources(pmc, nsrcs, srcs);
|
|
|
|
/* mark INCLUDE-mode sources */
|
|
|
|
scount = 0;
|
|
for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
|
|
if (scount == nsrcs)
|
|
break;
|
|
for (i=0; i<nsrcs; i++) {
|
|
if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
|
|
psf->sf_gsresp = 1;
|
|
scount++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (!scount) {
|
|
pmc->mca_flags &= ~MAF_GSQUERY;
|
|
return 0;
|
|
}
|
|
pmc->mca_flags |= MAF_GSQUERY;
|
|
return 1;
|
|
}
|
|
|
|
int igmp6_event_query(struct sk_buff *skb)
|
|
{
|
|
struct mld2_query *mlh2 = NULL;
|
|
struct ifmcaddr6 *ma;
|
|
struct in6_addr *group;
|
|
unsigned long max_delay;
|
|
struct inet6_dev *idev;
|
|
struct icmp6hdr *hdr;
|
|
int group_type;
|
|
int mark = 0;
|
|
int len;
|
|
|
|
if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
|
|
return -EINVAL;
|
|
|
|
/* compute payload length excluding extension headers */
|
|
len = ntohs(skb->nh.ipv6h->payload_len) + sizeof(struct ipv6hdr);
|
|
len -= (char *)skb->h.raw - (char *)skb->nh.ipv6h;
|
|
|
|
/* Drop queries with not link local source */
|
|
if (!(ipv6_addr_type(&skb->nh.ipv6h->saddr)&IPV6_ADDR_LINKLOCAL))
|
|
return -EINVAL;
|
|
|
|
idev = in6_dev_get(skb->dev);
|
|
|
|
if (idev == NULL)
|
|
return 0;
|
|
|
|
hdr = (struct icmp6hdr *) skb->h.raw;
|
|
group = (struct in6_addr *) (hdr + 1);
|
|
group_type = ipv6_addr_type(group);
|
|
|
|
if (group_type != IPV6_ADDR_ANY &&
|
|
!(group_type&IPV6_ADDR_MULTICAST)) {
|
|
in6_dev_put(idev);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (len == 24) {
|
|
int switchback;
|
|
/* MLDv1 router present */
|
|
|
|
/* Translate milliseconds to jiffies */
|
|
max_delay = (ntohs(hdr->icmp6_maxdelay)*HZ)/1000;
|
|
|
|
switchback = (idev->mc_qrv + 1) * max_delay;
|
|
idev->mc_v1_seen = jiffies + switchback;
|
|
|
|
/* cancel the interface change timer */
|
|
idev->mc_ifc_count = 0;
|
|
if (del_timer(&idev->mc_ifc_timer))
|
|
__in6_dev_put(idev);
|
|
/* clear deleted report items */
|
|
mld_clear_delrec(idev);
|
|
} else if (len >= 28) {
|
|
int srcs_offset = sizeof(struct mld2_query) -
|
|
sizeof(struct icmp6hdr);
|
|
if (!pskb_may_pull(skb, srcs_offset)) {
|
|
in6_dev_put(idev);
|
|
return -EINVAL;
|
|
}
|
|
mlh2 = (struct mld2_query *) skb->h.raw;
|
|
max_delay = (MLDV2_MRC(ntohs(mlh2->mrc))*HZ)/1000;
|
|
if (!max_delay)
|
|
max_delay = 1;
|
|
idev->mc_maxdelay = max_delay;
|
|
if (mlh2->qrv)
|
|
idev->mc_qrv = mlh2->qrv;
|
|
if (group_type == IPV6_ADDR_ANY) { /* general query */
|
|
if (mlh2->nsrcs) {
|
|
in6_dev_put(idev);
|
|
return -EINVAL; /* no sources allowed */
|
|
}
|
|
mld_gq_start_timer(idev);
|
|
in6_dev_put(idev);
|
|
return 0;
|
|
}
|
|
/* mark sources to include, if group & source-specific */
|
|
if (mlh2->nsrcs != 0) {
|
|
if (!pskb_may_pull(skb, srcs_offset +
|
|
ntohs(mlh2->nsrcs) * sizeof(struct in6_addr))) {
|
|
in6_dev_put(idev);
|
|
return -EINVAL;
|
|
}
|
|
mlh2 = (struct mld2_query *) skb->h.raw;
|
|
mark = 1;
|
|
}
|
|
} else {
|
|
in6_dev_put(idev);
|
|
return -EINVAL;
|
|
}
|
|
|
|
read_lock_bh(&idev->lock);
|
|
if (group_type == IPV6_ADDR_ANY) {
|
|
for (ma = idev->mc_list; ma; ma=ma->next) {
|
|
spin_lock_bh(&ma->mca_lock);
|
|
igmp6_group_queried(ma, max_delay);
|
|
spin_unlock_bh(&ma->mca_lock);
|
|
}
|
|
} else {
|
|
for (ma = idev->mc_list; ma; ma=ma->next) {
|
|
if (group_type != IPV6_ADDR_ANY &&
|
|
!ipv6_addr_equal(group, &ma->mca_addr))
|
|
continue;
|
|
spin_lock_bh(&ma->mca_lock);
|
|
if (ma->mca_flags & MAF_TIMER_RUNNING) {
|
|
/* gsquery <- gsquery && mark */
|
|
if (!mark)
|
|
ma->mca_flags &= ~MAF_GSQUERY;
|
|
} else {
|
|
/* gsquery <- mark */
|
|
if (mark)
|
|
ma->mca_flags |= MAF_GSQUERY;
|
|
else
|
|
ma->mca_flags &= ~MAF_GSQUERY;
|
|
}
|
|
if (!(ma->mca_flags & MAF_GSQUERY) ||
|
|
mld_marksources(ma, ntohs(mlh2->nsrcs), mlh2->srcs))
|
|
igmp6_group_queried(ma, max_delay);
|
|
spin_unlock_bh(&ma->mca_lock);
|
|
if (group_type != IPV6_ADDR_ANY)
|
|
break;
|
|
}
|
|
}
|
|
read_unlock_bh(&idev->lock);
|
|
in6_dev_put(idev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int igmp6_event_report(struct sk_buff *skb)
|
|
{
|
|
struct ifmcaddr6 *ma;
|
|
struct in6_addr *addrp;
|
|
struct inet6_dev *idev;
|
|
struct icmp6hdr *hdr;
|
|
int addr_type;
|
|
|
|
/* Our own report looped back. Ignore it. */
|
|
if (skb->pkt_type == PACKET_LOOPBACK)
|
|
return 0;
|
|
|
|
/* send our report if the MC router may not have heard this report */
|
|
if (skb->pkt_type != PACKET_MULTICAST &&
|
|
skb->pkt_type != PACKET_BROADCAST)
|
|
return 0;
|
|
|
|
if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
|
|
return -EINVAL;
|
|
|
|
hdr = (struct icmp6hdr*) skb->h.raw;
|
|
|
|
/* Drop reports with not link local source */
|
|
addr_type = ipv6_addr_type(&skb->nh.ipv6h->saddr);
|
|
if (addr_type != IPV6_ADDR_ANY &&
|
|
!(addr_type&IPV6_ADDR_LINKLOCAL))
|
|
return -EINVAL;
|
|
|
|
addrp = (struct in6_addr *) (hdr + 1);
|
|
|
|
idev = in6_dev_get(skb->dev);
|
|
if (idev == NULL)
|
|
return -ENODEV;
|
|
|
|
/*
|
|
* Cancel the timer for this group
|
|
*/
|
|
|
|
read_lock_bh(&idev->lock);
|
|
for (ma = idev->mc_list; ma; ma=ma->next) {
|
|
if (ipv6_addr_equal(&ma->mca_addr, addrp)) {
|
|
spin_lock(&ma->mca_lock);
|
|
if (del_timer(&ma->mca_timer))
|
|
atomic_dec(&ma->mca_refcnt);
|
|
ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
|
|
spin_unlock(&ma->mca_lock);
|
|
break;
|
|
}
|
|
}
|
|
read_unlock_bh(&idev->lock);
|
|
in6_dev_put(idev);
|
|
return 0;
|
|
}
|
|
|
|
static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
|
|
int gdeleted, int sdeleted)
|
|
{
|
|
switch (type) {
|
|
case MLD2_MODE_IS_INCLUDE:
|
|
case MLD2_MODE_IS_EXCLUDE:
|
|
if (gdeleted || sdeleted)
|
|
return 0;
|
|
if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) {
|
|
if (pmc->mca_sfmode == MCAST_INCLUDE)
|
|
return 1;
|
|
/* don't include if this source is excluded
|
|
* in all filters
|
|
*/
|
|
if (psf->sf_count[MCAST_INCLUDE])
|
|
return 0;
|
|
return pmc->mca_sfcount[MCAST_EXCLUDE] ==
|
|
psf->sf_count[MCAST_EXCLUDE];
|
|
}
|
|
return 0;
|
|
case MLD2_CHANGE_TO_INCLUDE:
|
|
if (gdeleted || sdeleted)
|
|
return 0;
|
|
return psf->sf_count[MCAST_INCLUDE] != 0;
|
|
case MLD2_CHANGE_TO_EXCLUDE:
|
|
if (gdeleted || sdeleted)
|
|
return 0;
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
|
|
psf->sf_count[MCAST_INCLUDE])
|
|
return 0;
|
|
return pmc->mca_sfcount[MCAST_EXCLUDE] ==
|
|
psf->sf_count[MCAST_EXCLUDE];
|
|
case MLD2_ALLOW_NEW_SOURCES:
|
|
if (gdeleted || !psf->sf_crcount)
|
|
return 0;
|
|
return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
|
|
case MLD2_BLOCK_OLD_SOURCES:
|
|
if (pmc->mca_sfmode == MCAST_INCLUDE)
|
|
return gdeleted || (psf->sf_crcount && sdeleted);
|
|
return psf->sf_crcount && !gdeleted && !sdeleted;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
|
|
{
|
|
struct ip6_sf_list *psf;
|
|
int scount = 0;
|
|
|
|
for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
|
|
if (!is_in(pmc, psf, type, gdeleted, sdeleted))
|
|
continue;
|
|
scount++;
|
|
}
|
|
return scount;
|
|
}
|
|
|
|
static struct sk_buff *mld_newpack(struct net_device *dev, int size)
|
|
{
|
|
struct sock *sk = igmp6_socket->sk;
|
|
struct sk_buff *skb;
|
|
struct mld2_report *pmr;
|
|
struct in6_addr addr_buf;
|
|
int err;
|
|
u8 ra[8] = { IPPROTO_ICMPV6, 0,
|
|
IPV6_TLV_ROUTERALERT, 2, 0, 0,
|
|
IPV6_TLV_PADN, 0 };
|
|
|
|
/* we assume size > sizeof(ra) here */
|
|
skb = sock_alloc_send_skb(sk, size + LL_RESERVED_SPACE(dev), 1, &err);
|
|
|
|
if (skb == 0)
|
|
return NULL;
|
|
|
|
skb_reserve(skb, LL_RESERVED_SPACE(dev));
|
|
|
|
if (ipv6_get_lladdr(dev, &addr_buf)) {
|
|
/* <draft-ietf-magma-mld-source-05.txt>:
|
|
* use unspecified address as the source address
|
|
* when a valid link-local address is not available.
|
|
*/
|
|
memset(&addr_buf, 0, sizeof(addr_buf));
|
|
}
|
|
|
|
ip6_nd_hdr(sk, skb, dev, &addr_buf, &mld2_all_mcr, NEXTHDR_HOP, 0);
|
|
|
|
memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
|
|
|
|
pmr =(struct mld2_report *)skb_put(skb, sizeof(*pmr));
|
|
skb->h.raw = (unsigned char *)pmr;
|
|
pmr->type = ICMPV6_MLD2_REPORT;
|
|
pmr->resv1 = 0;
|
|
pmr->csum = 0;
|
|
pmr->resv2 = 0;
|
|
pmr->ngrec = 0;
|
|
return skb;
|
|
}
|
|
|
|
static inline int mld_dev_queue_xmit2(struct sk_buff *skb)
|
|
{
|
|
struct net_device *dev = skb->dev;
|
|
|
|
if (dev->hard_header) {
|
|
unsigned char ha[MAX_ADDR_LEN];
|
|
int err;
|
|
|
|
ndisc_mc_map(&skb->nh.ipv6h->daddr, ha, dev, 1);
|
|
err = dev->hard_header(skb, dev, ETH_P_IPV6, ha, NULL, skb->len);
|
|
if (err < 0) {
|
|
kfree_skb(skb);
|
|
return err;
|
|
}
|
|
}
|
|
return dev_queue_xmit(skb);
|
|
}
|
|
|
|
static inline int mld_dev_queue_xmit(struct sk_buff *skb)
|
|
{
|
|
return NF_HOOK(PF_INET6, NF_IP6_POST_ROUTING, skb, NULL, skb->dev,
|
|
mld_dev_queue_xmit2);
|
|
}
|
|
|
|
static void mld_sendpack(struct sk_buff *skb)
|
|
{
|
|
struct ipv6hdr *pip6 = skb->nh.ipv6h;
|
|
struct mld2_report *pmr = (struct mld2_report *)skb->h.raw;
|
|
int payload_len, mldlen;
|
|
struct inet6_dev *idev = in6_dev_get(skb->dev);
|
|
int err;
|
|
|
|
IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS);
|
|
payload_len = skb->tail - (unsigned char *)skb->nh.ipv6h -
|
|
sizeof(struct ipv6hdr);
|
|
mldlen = skb->tail - skb->h.raw;
|
|
pip6->payload_len = htons(payload_len);
|
|
|
|
pmr->csum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
|
|
IPPROTO_ICMPV6, csum_partial(skb->h.raw, mldlen, 0));
|
|
err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dev,
|
|
mld_dev_queue_xmit);
|
|
if (!err) {
|
|
ICMP6_INC_STATS(idev,ICMP6_MIB_OUTMSGS);
|
|
IP6_INC_STATS(IPSTATS_MIB_OUTMCASTPKTS);
|
|
} else
|
|
IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
|
|
|
|
if (likely(idev != NULL))
|
|
in6_dev_put(idev);
|
|
}
|
|
|
|
static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
|
|
{
|
|
return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel);
|
|
}
|
|
|
|
static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
|
|
int type, struct mld2_grec **ppgr)
|
|
{
|
|
struct net_device *dev = pmc->idev->dev;
|
|
struct mld2_report *pmr;
|
|
struct mld2_grec *pgr;
|
|
|
|
if (!skb)
|
|
skb = mld_newpack(dev, dev->mtu);
|
|
if (!skb)
|
|
return NULL;
|
|
pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
|
|
pgr->grec_type = type;
|
|
pgr->grec_auxwords = 0;
|
|
pgr->grec_nsrcs = 0;
|
|
pgr->grec_mca = pmc->mca_addr; /* structure copy */
|
|
pmr = (struct mld2_report *)skb->h.raw;
|
|
pmr->ngrec = htons(ntohs(pmr->ngrec)+1);
|
|
*ppgr = pgr;
|
|
return skb;
|
|
}
|
|
|
|
#define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
|
|
skb_tailroom(skb)) : 0)
|
|
|
|
static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
|
|
int type, int gdeleted, int sdeleted)
|
|
{
|
|
struct net_device *dev = pmc->idev->dev;
|
|
struct mld2_report *pmr;
|
|
struct mld2_grec *pgr = NULL;
|
|
struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
|
|
int scount, stotal, first, isquery, truncate;
|
|
|
|
if (pmc->mca_flags & MAF_NOREPORT)
|
|
return skb;
|
|
|
|
isquery = type == MLD2_MODE_IS_INCLUDE ||
|
|
type == MLD2_MODE_IS_EXCLUDE;
|
|
truncate = type == MLD2_MODE_IS_EXCLUDE ||
|
|
type == MLD2_CHANGE_TO_EXCLUDE;
|
|
|
|
stotal = scount = 0;
|
|
|
|
psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
|
|
|
|
if (!*psf_list)
|
|
goto empty_source;
|
|
|
|
pmr = skb ? (struct mld2_report *)skb->h.raw : NULL;
|
|
|
|
/* EX and TO_EX get a fresh packet, if needed */
|
|
if (truncate) {
|
|
if (pmr && pmr->ngrec &&
|
|
AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
|
|
if (skb)
|
|
mld_sendpack(skb);
|
|
skb = mld_newpack(dev, dev->mtu);
|
|
}
|
|
}
|
|
first = 1;
|
|
psf_prev = NULL;
|
|
for (psf=*psf_list; psf; psf=psf_next) {
|
|
struct in6_addr *psrc;
|
|
|
|
psf_next = psf->sf_next;
|
|
|
|
if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
|
|
psf_prev = psf;
|
|
continue;
|
|
}
|
|
|
|
/* clear marks on query responses */
|
|
if (isquery)
|
|
psf->sf_gsresp = 0;
|
|
|
|
if (AVAILABLE(skb) < sizeof(*psrc) +
|
|
first*sizeof(struct mld2_grec)) {
|
|
if (truncate && !first)
|
|
break; /* truncate these */
|
|
if (pgr)
|
|
pgr->grec_nsrcs = htons(scount);
|
|
if (skb)
|
|
mld_sendpack(skb);
|
|
skb = mld_newpack(dev, dev->mtu);
|
|
first = 1;
|
|
scount = 0;
|
|
}
|
|
if (first) {
|
|
skb = add_grhead(skb, pmc, type, &pgr);
|
|
first = 0;
|
|
}
|
|
psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
|
|
*psrc = psf->sf_addr;
|
|
scount++; stotal++;
|
|
if ((type == MLD2_ALLOW_NEW_SOURCES ||
|
|
type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
|
|
psf->sf_crcount--;
|
|
if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
|
|
if (psf_prev)
|
|
psf_prev->sf_next = psf->sf_next;
|
|
else
|
|
*psf_list = psf->sf_next;
|
|
kfree(psf);
|
|
continue;
|
|
}
|
|
}
|
|
psf_prev = psf;
|
|
}
|
|
|
|
empty_source:
|
|
if (!stotal) {
|
|
if (type == MLD2_ALLOW_NEW_SOURCES ||
|
|
type == MLD2_BLOCK_OLD_SOURCES)
|
|
return skb;
|
|
if (pmc->mca_crcount || isquery) {
|
|
/* make sure we have room for group header */
|
|
if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) {
|
|
mld_sendpack(skb);
|
|
skb = NULL; /* add_grhead will get a new one */
|
|
}
|
|
skb = add_grhead(skb, pmc, type, &pgr);
|
|
}
|
|
}
|
|
if (pgr)
|
|
pgr->grec_nsrcs = htons(scount);
|
|
|
|
if (isquery)
|
|
pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
|
|
return skb;
|
|
}
|
|
|
|
static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
|
|
{
|
|
struct sk_buff *skb = NULL;
|
|
int type;
|
|
|
|
if (!pmc) {
|
|
read_lock_bh(&idev->lock);
|
|
for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
|
|
if (pmc->mca_flags & MAF_NOREPORT)
|
|
continue;
|
|
spin_lock_bh(&pmc->mca_lock);
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE])
|
|
type = MLD2_MODE_IS_EXCLUDE;
|
|
else
|
|
type = MLD2_MODE_IS_INCLUDE;
|
|
skb = add_grec(skb, pmc, type, 0, 0);
|
|
spin_unlock_bh(&pmc->mca_lock);
|
|
}
|
|
read_unlock_bh(&idev->lock);
|
|
} else {
|
|
spin_lock_bh(&pmc->mca_lock);
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE])
|
|
type = MLD2_MODE_IS_EXCLUDE;
|
|
else
|
|
type = MLD2_MODE_IS_INCLUDE;
|
|
skb = add_grec(skb, pmc, type, 0, 0);
|
|
spin_unlock_bh(&pmc->mca_lock);
|
|
}
|
|
if (skb)
|
|
mld_sendpack(skb);
|
|
}
|
|
|
|
/*
|
|
* remove zero-count source records from a source filter list
|
|
*/
|
|
static void mld_clear_zeros(struct ip6_sf_list **ppsf)
|
|
{
|
|
struct ip6_sf_list *psf_prev, *psf_next, *psf;
|
|
|
|
psf_prev = NULL;
|
|
for (psf=*ppsf; psf; psf = psf_next) {
|
|
psf_next = psf->sf_next;
|
|
if (psf->sf_crcount == 0) {
|
|
if (psf_prev)
|
|
psf_prev->sf_next = psf->sf_next;
|
|
else
|
|
*ppsf = psf->sf_next;
|
|
kfree(psf);
|
|
} else
|
|
psf_prev = psf;
|
|
}
|
|
}
|
|
|
|
static void mld_send_cr(struct inet6_dev *idev)
|
|
{
|
|
struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
|
|
struct sk_buff *skb = NULL;
|
|
int type, dtype;
|
|
|
|
read_lock_bh(&idev->lock);
|
|
write_lock_bh(&idev->mc_lock);
|
|
|
|
/* deleted MCA's */
|
|
pmc_prev = NULL;
|
|
for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) {
|
|
pmc_next = pmc->next;
|
|
if (pmc->mca_sfmode == MCAST_INCLUDE) {
|
|
type = MLD2_BLOCK_OLD_SOURCES;
|
|
dtype = MLD2_BLOCK_OLD_SOURCES;
|
|
skb = add_grec(skb, pmc, type, 1, 0);
|
|
skb = add_grec(skb, pmc, dtype, 1, 1);
|
|
}
|
|
if (pmc->mca_crcount) {
|
|
if (pmc->mca_sfmode == MCAST_EXCLUDE) {
|
|
type = MLD2_CHANGE_TO_INCLUDE;
|
|
skb = add_grec(skb, pmc, type, 1, 0);
|
|
}
|
|
pmc->mca_crcount--;
|
|
if (pmc->mca_crcount == 0) {
|
|
mld_clear_zeros(&pmc->mca_tomb);
|
|
mld_clear_zeros(&pmc->mca_sources);
|
|
}
|
|
}
|
|
if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
|
|
!pmc->mca_sources) {
|
|
if (pmc_prev)
|
|
pmc_prev->next = pmc_next;
|
|
else
|
|
idev->mc_tomb = pmc_next;
|
|
in6_dev_put(pmc->idev);
|
|
kfree(pmc);
|
|
} else
|
|
pmc_prev = pmc;
|
|
}
|
|
write_unlock_bh(&idev->mc_lock);
|
|
|
|
/* change recs */
|
|
for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
|
|
spin_lock_bh(&pmc->mca_lock);
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
|
|
type = MLD2_BLOCK_OLD_SOURCES;
|
|
dtype = MLD2_ALLOW_NEW_SOURCES;
|
|
} else {
|
|
type = MLD2_ALLOW_NEW_SOURCES;
|
|
dtype = MLD2_BLOCK_OLD_SOURCES;
|
|
}
|
|
skb = add_grec(skb, pmc, type, 0, 0);
|
|
skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */
|
|
|
|
/* filter mode changes */
|
|
if (pmc->mca_crcount) {
|
|
if (pmc->mca_sfmode == MCAST_EXCLUDE)
|
|
type = MLD2_CHANGE_TO_EXCLUDE;
|
|
else
|
|
type = MLD2_CHANGE_TO_INCLUDE;
|
|
skb = add_grec(skb, pmc, type, 0, 0);
|
|
pmc->mca_crcount--;
|
|
}
|
|
spin_unlock_bh(&pmc->mca_lock);
|
|
}
|
|
read_unlock_bh(&idev->lock);
|
|
if (!skb)
|
|
return;
|
|
(void) mld_sendpack(skb);
|
|
}
|
|
|
|
static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
|
|
{
|
|
struct sock *sk = igmp6_socket->sk;
|
|
struct inet6_dev *idev;
|
|
struct sk_buff *skb;
|
|
struct icmp6hdr *hdr;
|
|
struct in6_addr *snd_addr;
|
|
struct in6_addr *addrp;
|
|
struct in6_addr addr_buf;
|
|
struct in6_addr all_routers;
|
|
int err, len, payload_len, full_len;
|
|
u8 ra[8] = { IPPROTO_ICMPV6, 0,
|
|
IPV6_TLV_ROUTERALERT, 2, 0, 0,
|
|
IPV6_TLV_PADN, 0 };
|
|
|
|
IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS);
|
|
snd_addr = addr;
|
|
if (type == ICMPV6_MGM_REDUCTION) {
|
|
snd_addr = &all_routers;
|
|
ipv6_addr_all_routers(&all_routers);
|
|
}
|
|
|
|
len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
|
|
payload_len = len + sizeof(ra);
|
|
full_len = sizeof(struct ipv6hdr) + payload_len;
|
|
|
|
skb = sock_alloc_send_skb(sk, LL_RESERVED_SPACE(dev) + full_len, 1, &err);
|
|
|
|
if (skb == NULL) {
|
|
IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
|
|
return;
|
|
}
|
|
|
|
skb_reserve(skb, LL_RESERVED_SPACE(dev));
|
|
|
|
if (ipv6_get_lladdr(dev, &addr_buf)) {
|
|
/* <draft-ietf-magma-mld-source-05.txt>:
|
|
* use unspecified address as the source address
|
|
* when a valid link-local address is not available.
|
|
*/
|
|
memset(&addr_buf, 0, sizeof(addr_buf));
|
|
}
|
|
|
|
ip6_nd_hdr(sk, skb, dev, &addr_buf, snd_addr, NEXTHDR_HOP, payload_len);
|
|
|
|
memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
|
|
|
|
hdr = (struct icmp6hdr *) skb_put(skb, sizeof(struct icmp6hdr));
|
|
memset(hdr, 0, sizeof(struct icmp6hdr));
|
|
hdr->icmp6_type = type;
|
|
|
|
addrp = (struct in6_addr *) skb_put(skb, sizeof(struct in6_addr));
|
|
ipv6_addr_copy(addrp, addr);
|
|
|
|
hdr->icmp6_cksum = csum_ipv6_magic(&addr_buf, snd_addr, len,
|
|
IPPROTO_ICMPV6,
|
|
csum_partial((__u8 *) hdr, len, 0));
|
|
|
|
idev = in6_dev_get(skb->dev);
|
|
|
|
err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dev,
|
|
mld_dev_queue_xmit);
|
|
if (!err) {
|
|
if (type == ICMPV6_MGM_REDUCTION)
|
|
ICMP6_INC_STATS(idev, ICMP6_MIB_OUTGROUPMEMBREDUCTIONS);
|
|
else
|
|
ICMP6_INC_STATS(idev, ICMP6_MIB_OUTGROUPMEMBRESPONSES);
|
|
ICMP6_INC_STATS(idev, ICMP6_MIB_OUTMSGS);
|
|
IP6_INC_STATS(IPSTATS_MIB_OUTMCASTPKTS);
|
|
} else
|
|
IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
|
|
|
|
if (likely(idev != NULL))
|
|
in6_dev_put(idev);
|
|
return;
|
|
}
|
|
|
|
static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
|
|
struct in6_addr *psfsrc)
|
|
{
|
|
struct ip6_sf_list *psf, *psf_prev;
|
|
int rv = 0;
|
|
|
|
psf_prev = NULL;
|
|
for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
|
|
if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
|
|
break;
|
|
psf_prev = psf;
|
|
}
|
|
if (!psf || psf->sf_count[sfmode] == 0) {
|
|
/* source filter not found, or count wrong => bug */
|
|
return -ESRCH;
|
|
}
|
|
psf->sf_count[sfmode]--;
|
|
if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
|
|
struct inet6_dev *idev = pmc->idev;
|
|
|
|
/* no more filters for this source */
|
|
if (psf_prev)
|
|
psf_prev->sf_next = psf->sf_next;
|
|
else
|
|
pmc->mca_sources = psf->sf_next;
|
|
if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
|
|
!MLD_V1_SEEN(idev)) {
|
|
psf->sf_crcount = idev->mc_qrv;
|
|
psf->sf_next = pmc->mca_tomb;
|
|
pmc->mca_tomb = psf;
|
|
rv = 1;
|
|
} else
|
|
kfree(psf);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca,
|
|
int sfmode, int sfcount, struct in6_addr *psfsrc,
|
|
int delta)
|
|
{
|
|
struct ifmcaddr6 *pmc;
|
|
int changerec = 0;
|
|
int i, err;
|
|
|
|
if (!idev)
|
|
return -ENODEV;
|
|
read_lock_bh(&idev->lock);
|
|
for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
|
|
if (ipv6_addr_equal(pmca, &pmc->mca_addr))
|
|
break;
|
|
}
|
|
if (!pmc) {
|
|
/* MCA not found?? bug */
|
|
read_unlock_bh(&idev->lock);
|
|
return -ESRCH;
|
|
}
|
|
spin_lock_bh(&pmc->mca_lock);
|
|
sf_markstate(pmc);
|
|
if (!delta) {
|
|
if (!pmc->mca_sfcount[sfmode]) {
|
|
spin_unlock_bh(&pmc->mca_lock);
|
|
read_unlock_bh(&idev->lock);
|
|
return -EINVAL;
|
|
}
|
|
pmc->mca_sfcount[sfmode]--;
|
|
}
|
|
err = 0;
|
|
for (i=0; i<sfcount; i++) {
|
|
int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
|
|
|
|
changerec |= rv > 0;
|
|
if (!err && rv < 0)
|
|
err = rv;
|
|
}
|
|
if (pmc->mca_sfmode == MCAST_EXCLUDE &&
|
|
pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
|
|
pmc->mca_sfcount[MCAST_INCLUDE]) {
|
|
struct ip6_sf_list *psf;
|
|
|
|
/* filter mode change */
|
|
pmc->mca_sfmode = MCAST_INCLUDE;
|
|
pmc->mca_crcount = idev->mc_qrv;
|
|
idev->mc_ifc_count = pmc->mca_crcount;
|
|
for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
|
|
psf->sf_crcount = 0;
|
|
mld_ifc_event(pmc->idev);
|
|
} else if (sf_setstate(pmc) || changerec)
|
|
mld_ifc_event(pmc->idev);
|
|
spin_unlock_bh(&pmc->mca_lock);
|
|
read_unlock_bh(&idev->lock);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Add multicast single-source filter to the interface list
|
|
*/
|
|
static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
|
|
struct in6_addr *psfsrc, int delta)
|
|
{
|
|
struct ip6_sf_list *psf, *psf_prev;
|
|
|
|
psf_prev = NULL;
|
|
for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
|
|
if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
|
|
break;
|
|
psf_prev = psf;
|
|
}
|
|
if (!psf) {
|
|
psf = kmalloc(sizeof(*psf), GFP_ATOMIC);
|
|
if (!psf)
|
|
return -ENOBUFS;
|
|
memset(psf, 0, sizeof(*psf));
|
|
psf->sf_addr = *psfsrc;
|
|
if (psf_prev) {
|
|
psf_prev->sf_next = psf;
|
|
} else
|
|
pmc->mca_sources = psf;
|
|
}
|
|
psf->sf_count[sfmode]++;
|
|
return 0;
|
|
}
|
|
|
|
static void sf_markstate(struct ifmcaddr6 *pmc)
|
|
{
|
|
struct ip6_sf_list *psf;
|
|
int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
|
|
|
|
for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
|
|
psf->sf_oldin = mca_xcount ==
|
|
psf->sf_count[MCAST_EXCLUDE] &&
|
|
!psf->sf_count[MCAST_INCLUDE];
|
|
} else
|
|
psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
|
|
}
|
|
|
|
static int sf_setstate(struct ifmcaddr6 *pmc)
|
|
{
|
|
struct ip6_sf_list *psf;
|
|
int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
|
|
int qrv = pmc->idev->mc_qrv;
|
|
int new_in, rv;
|
|
|
|
rv = 0;
|
|
for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
|
|
new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
|
|
!psf->sf_count[MCAST_INCLUDE];
|
|
} else
|
|
new_in = psf->sf_count[MCAST_INCLUDE] != 0;
|
|
if (new_in != psf->sf_oldin) {
|
|
psf->sf_crcount = qrv;
|
|
rv++;
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* Add multicast source filter list to the interface list
|
|
*/
|
|
static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca,
|
|
int sfmode, int sfcount, struct in6_addr *psfsrc,
|
|
int delta)
|
|
{
|
|
struct ifmcaddr6 *pmc;
|
|
int isexclude;
|
|
int i, err;
|
|
|
|
if (!idev)
|
|
return -ENODEV;
|
|
read_lock_bh(&idev->lock);
|
|
for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
|
|
if (ipv6_addr_equal(pmca, &pmc->mca_addr))
|
|
break;
|
|
}
|
|
if (!pmc) {
|
|
/* MCA not found?? bug */
|
|
read_unlock_bh(&idev->lock);
|
|
return -ESRCH;
|
|
}
|
|
spin_lock_bh(&pmc->mca_lock);
|
|
|
|
sf_markstate(pmc);
|
|
isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
|
|
if (!delta)
|
|
pmc->mca_sfcount[sfmode]++;
|
|
err = 0;
|
|
for (i=0; i<sfcount; i++) {
|
|
err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta);
|
|
if (err)
|
|
break;
|
|
}
|
|
if (err) {
|
|
int j;
|
|
|
|
if (!delta)
|
|
pmc->mca_sfcount[sfmode]--;
|
|
for (j=0; j<i; j++)
|
|
(void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
|
|
} else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
|
|
struct inet6_dev *idev = pmc->idev;
|
|
struct ip6_sf_list *psf;
|
|
|
|
/* filter mode change */
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE])
|
|
pmc->mca_sfmode = MCAST_EXCLUDE;
|
|
else if (pmc->mca_sfcount[MCAST_INCLUDE])
|
|
pmc->mca_sfmode = MCAST_INCLUDE;
|
|
/* else no filters; keep old mode for reports */
|
|
|
|
pmc->mca_crcount = idev->mc_qrv;
|
|
idev->mc_ifc_count = pmc->mca_crcount;
|
|
for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
|
|
psf->sf_crcount = 0;
|
|
mld_ifc_event(idev);
|
|
} else if (sf_setstate(pmc))
|
|
mld_ifc_event(idev);
|
|
spin_unlock_bh(&pmc->mca_lock);
|
|
read_unlock_bh(&idev->lock);
|
|
return err;
|
|
}
|
|
|
|
static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
|
|
{
|
|
struct ip6_sf_list *psf, *nextpsf;
|
|
|
|
for (psf=pmc->mca_tomb; psf; psf=nextpsf) {
|
|
nextpsf = psf->sf_next;
|
|
kfree(psf);
|
|
}
|
|
pmc->mca_tomb = NULL;
|
|
for (psf=pmc->mca_sources; psf; psf=nextpsf) {
|
|
nextpsf = psf->sf_next;
|
|
kfree(psf);
|
|
}
|
|
pmc->mca_sources = NULL;
|
|
pmc->mca_sfmode = MCAST_EXCLUDE;
|
|
pmc->mca_sfcount[MCAST_INCLUDE] = 0;
|
|
pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
|
|
}
|
|
|
|
|
|
static void igmp6_join_group(struct ifmcaddr6 *ma)
|
|
{
|
|
unsigned long delay;
|
|
|
|
if (ma->mca_flags & MAF_NOREPORT)
|
|
return;
|
|
|
|
igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
|
|
|
|
delay = net_random() % IGMP6_UNSOLICITED_IVAL;
|
|
|
|
spin_lock_bh(&ma->mca_lock);
|
|
if (del_timer(&ma->mca_timer)) {
|
|
atomic_dec(&ma->mca_refcnt);
|
|
delay = ma->mca_timer.expires - jiffies;
|
|
}
|
|
|
|
if (!mod_timer(&ma->mca_timer, jiffies + delay))
|
|
atomic_inc(&ma->mca_refcnt);
|
|
ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
|
|
spin_unlock_bh(&ma->mca_lock);
|
|
}
|
|
|
|
static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
|
|
struct inet6_dev *idev)
|
|
{
|
|
int err;
|
|
|
|
/* callers have the socket lock and a write lock on ipv6_sk_mc_lock,
|
|
* so no other readers or writers of iml or its sflist
|
|
*/
|
|
if (iml->sflist == 0) {
|
|
/* any-source empty exclude case */
|
|
return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
|
|
}
|
|
err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
|
|
iml->sflist->sl_count, iml->sflist->sl_addr, 0);
|
|
sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
|
|
iml->sflist = NULL;
|
|
return err;
|
|
}
|
|
|
|
static void igmp6_leave_group(struct ifmcaddr6 *ma)
|
|
{
|
|
if (MLD_V1_SEEN(ma->idev)) {
|
|
if (ma->mca_flags & MAF_LAST_REPORTER)
|
|
igmp6_send(&ma->mca_addr, ma->idev->dev,
|
|
ICMPV6_MGM_REDUCTION);
|
|
} else {
|
|
mld_add_delrec(ma->idev, ma);
|
|
mld_ifc_event(ma->idev);
|
|
}
|
|
}
|
|
|
|
static void mld_gq_timer_expire(unsigned long data)
|
|
{
|
|
struct inet6_dev *idev = (struct inet6_dev *)data;
|
|
|
|
idev->mc_gq_running = 0;
|
|
mld_send_report(idev, NULL);
|
|
__in6_dev_put(idev);
|
|
}
|
|
|
|
static void mld_ifc_timer_expire(unsigned long data)
|
|
{
|
|
struct inet6_dev *idev = (struct inet6_dev *)data;
|
|
|
|
mld_send_cr(idev);
|
|
if (idev->mc_ifc_count) {
|
|
idev->mc_ifc_count--;
|
|
if (idev->mc_ifc_count)
|
|
mld_ifc_start_timer(idev, idev->mc_maxdelay);
|
|
}
|
|
__in6_dev_put(idev);
|
|
}
|
|
|
|
static void mld_ifc_event(struct inet6_dev *idev)
|
|
{
|
|
if (MLD_V1_SEEN(idev))
|
|
return;
|
|
idev->mc_ifc_count = idev->mc_qrv;
|
|
mld_ifc_start_timer(idev, 1);
|
|
}
|
|
|
|
|
|
static void igmp6_timer_handler(unsigned long data)
|
|
{
|
|
struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
|
|
|
|
if (MLD_V1_SEEN(ma->idev))
|
|
igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
|
|
else
|
|
mld_send_report(ma->idev, ma);
|
|
|
|
spin_lock(&ma->mca_lock);
|
|
ma->mca_flags |= MAF_LAST_REPORTER;
|
|
ma->mca_flags &= ~MAF_TIMER_RUNNING;
|
|
spin_unlock(&ma->mca_lock);
|
|
ma_put(ma);
|
|
}
|
|
|
|
/* Device going down */
|
|
|
|
void ipv6_mc_down(struct inet6_dev *idev)
|
|
{
|
|
struct ifmcaddr6 *i;
|
|
|
|
/* Withdraw multicast list */
|
|
|
|
read_lock_bh(&idev->lock);
|
|
idev->mc_ifc_count = 0;
|
|
if (del_timer(&idev->mc_ifc_timer))
|
|
__in6_dev_put(idev);
|
|
idev->mc_gq_running = 0;
|
|
if (del_timer(&idev->mc_gq_timer))
|
|
__in6_dev_put(idev);
|
|
|
|
for (i = idev->mc_list; i; i=i->next)
|
|
igmp6_group_dropped(i);
|
|
read_unlock_bh(&idev->lock);
|
|
|
|
mld_clear_delrec(idev);
|
|
}
|
|
|
|
|
|
/* Device going up */
|
|
|
|
void ipv6_mc_up(struct inet6_dev *idev)
|
|
{
|
|
struct ifmcaddr6 *i;
|
|
|
|
/* Install multicast list, except for all-nodes (already installed) */
|
|
|
|
read_lock_bh(&idev->lock);
|
|
for (i = idev->mc_list; i; i=i->next)
|
|
igmp6_group_added(i);
|
|
read_unlock_bh(&idev->lock);
|
|
}
|
|
|
|
/* IPv6 device initialization. */
|
|
|
|
void ipv6_mc_init_dev(struct inet6_dev *idev)
|
|
{
|
|
struct in6_addr maddr;
|
|
|
|
write_lock_bh(&idev->lock);
|
|
rwlock_init(&idev->mc_lock);
|
|
idev->mc_gq_running = 0;
|
|
init_timer(&idev->mc_gq_timer);
|
|
idev->mc_gq_timer.data = (unsigned long) idev;
|
|
idev->mc_gq_timer.function = &mld_gq_timer_expire;
|
|
idev->mc_tomb = NULL;
|
|
idev->mc_ifc_count = 0;
|
|
init_timer(&idev->mc_ifc_timer);
|
|
idev->mc_ifc_timer.data = (unsigned long) idev;
|
|
idev->mc_ifc_timer.function = &mld_ifc_timer_expire;
|
|
idev->mc_qrv = MLD_QRV_DEFAULT;
|
|
idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL;
|
|
idev->mc_v1_seen = 0;
|
|
write_unlock_bh(&idev->lock);
|
|
|
|
/* Add all-nodes address. */
|
|
ipv6_addr_all_nodes(&maddr);
|
|
ipv6_dev_mc_inc(idev->dev, &maddr);
|
|
}
|
|
|
|
/*
|
|
* Device is about to be destroyed: clean up.
|
|
*/
|
|
|
|
void ipv6_mc_destroy_dev(struct inet6_dev *idev)
|
|
{
|
|
struct ifmcaddr6 *i;
|
|
struct in6_addr maddr;
|
|
|
|
/* Deactivate timers */
|
|
ipv6_mc_down(idev);
|
|
|
|
/* Delete all-nodes address. */
|
|
ipv6_addr_all_nodes(&maddr);
|
|
|
|
/* We cannot call ipv6_dev_mc_dec() directly, our caller in
|
|
* addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
|
|
* fail.
|
|
*/
|
|
__ipv6_dev_mc_dec(idev, &maddr);
|
|
|
|
if (idev->cnf.forwarding) {
|
|
ipv6_addr_all_routers(&maddr);
|
|
__ipv6_dev_mc_dec(idev, &maddr);
|
|
}
|
|
|
|
write_lock_bh(&idev->lock);
|
|
while ((i = idev->mc_list) != NULL) {
|
|
idev->mc_list = i->next;
|
|
write_unlock_bh(&idev->lock);
|
|
|
|
igmp6_group_dropped(i);
|
|
ma_put(i);
|
|
|
|
write_lock_bh(&idev->lock);
|
|
}
|
|
write_unlock_bh(&idev->lock);
|
|
}
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
struct igmp6_mc_iter_state {
|
|
struct net_device *dev;
|
|
struct inet6_dev *idev;
|
|
};
|
|
|
|
#define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
|
|
|
|
static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
|
|
{
|
|
struct ifmcaddr6 *im = NULL;
|
|
struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
|
|
|
|
for (state->dev = dev_base, state->idev = NULL;
|
|
state->dev;
|
|
state->dev = state->dev->next) {
|
|
struct inet6_dev *idev;
|
|
idev = in6_dev_get(state->dev);
|
|
if (!idev)
|
|
continue;
|
|
read_lock_bh(&idev->lock);
|
|
im = idev->mc_list;
|
|
if (im) {
|
|
state->idev = idev;
|
|
break;
|
|
}
|
|
read_unlock_bh(&idev->lock);
|
|
in6_dev_put(idev);
|
|
}
|
|
return im;
|
|
}
|
|
|
|
static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
|
|
{
|
|
struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
|
|
|
|
im = im->next;
|
|
while (!im) {
|
|
if (likely(state->idev != NULL)) {
|
|
read_unlock_bh(&state->idev->lock);
|
|
in6_dev_put(state->idev);
|
|
}
|
|
state->dev = state->dev->next;
|
|
if (!state->dev) {
|
|
state->idev = NULL;
|
|
break;
|
|
}
|
|
state->idev = in6_dev_get(state->dev);
|
|
if (!state->idev)
|
|
continue;
|
|
read_lock_bh(&state->idev->lock);
|
|
im = state->idev->mc_list;
|
|
}
|
|
return im;
|
|
}
|
|
|
|
static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
|
|
{
|
|
struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
|
|
if (im)
|
|
while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
|
|
--pos;
|
|
return pos ? NULL : im;
|
|
}
|
|
|
|
static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
|
|
{
|
|
read_lock(&dev_base_lock);
|
|
return igmp6_mc_get_idx(seq, *pos);
|
|
}
|
|
|
|
static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
|
|
{
|
|
struct ifmcaddr6 *im;
|
|
im = igmp6_mc_get_next(seq, v);
|
|
++*pos;
|
|
return im;
|
|
}
|
|
|
|
static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
|
|
{
|
|
struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
|
|
if (likely(state->idev != NULL)) {
|
|
read_unlock_bh(&state->idev->lock);
|
|
in6_dev_put(state->idev);
|
|
state->idev = NULL;
|
|
}
|
|
state->dev = NULL;
|
|
read_unlock(&dev_base_lock);
|
|
}
|
|
|
|
static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
|
|
{
|
|
struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
|
|
struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
|
|
|
|
seq_printf(seq,
|
|
"%-4d %-15s %04x%04x%04x%04x%04x%04x%04x%04x %5d %08X %ld\n",
|
|
state->dev->ifindex, state->dev->name,
|
|
NIP6(im->mca_addr),
|
|
im->mca_users, im->mca_flags,
|
|
(im->mca_flags&MAF_TIMER_RUNNING) ?
|
|
jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0);
|
|
return 0;
|
|
}
|
|
|
|
static struct seq_operations igmp6_mc_seq_ops = {
|
|
.start = igmp6_mc_seq_start,
|
|
.next = igmp6_mc_seq_next,
|
|
.stop = igmp6_mc_seq_stop,
|
|
.show = igmp6_mc_seq_show,
|
|
};
|
|
|
|
static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct seq_file *seq;
|
|
int rc = -ENOMEM;
|
|
struct igmp6_mc_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
|
|
|
|
if (!s)
|
|
goto out;
|
|
|
|
rc = seq_open(file, &igmp6_mc_seq_ops);
|
|
if (rc)
|
|
goto out_kfree;
|
|
|
|
seq = file->private_data;
|
|
seq->private = s;
|
|
memset(s, 0, sizeof(*s));
|
|
out:
|
|
return rc;
|
|
out_kfree:
|
|
kfree(s);
|
|
goto out;
|
|
}
|
|
|
|
static struct file_operations igmp6_mc_seq_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = igmp6_mc_seq_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release_private,
|
|
};
|
|
|
|
struct igmp6_mcf_iter_state {
|
|
struct net_device *dev;
|
|
struct inet6_dev *idev;
|
|
struct ifmcaddr6 *im;
|
|
};
|
|
|
|
#define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
|
|
|
|
static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
|
|
{
|
|
struct ip6_sf_list *psf = NULL;
|
|
struct ifmcaddr6 *im = NULL;
|
|
struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
|
|
|
|
for (state->dev = dev_base, state->idev = NULL, state->im = NULL;
|
|
state->dev;
|
|
state->dev = state->dev->next) {
|
|
struct inet6_dev *idev;
|
|
idev = in6_dev_get(state->dev);
|
|
if (unlikely(idev == NULL))
|
|
continue;
|
|
read_lock_bh(&idev->lock);
|
|
im = idev->mc_list;
|
|
if (likely(im != NULL)) {
|
|
spin_lock_bh(&im->mca_lock);
|
|
psf = im->mca_sources;
|
|
if (likely(psf != NULL)) {
|
|
state->im = im;
|
|
state->idev = idev;
|
|
break;
|
|
}
|
|
spin_unlock_bh(&im->mca_lock);
|
|
}
|
|
read_unlock_bh(&idev->lock);
|
|
in6_dev_put(idev);
|
|
}
|
|
return psf;
|
|
}
|
|
|
|
static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
|
|
{
|
|
struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
|
|
|
|
psf = psf->sf_next;
|
|
while (!psf) {
|
|
spin_unlock_bh(&state->im->mca_lock);
|
|
state->im = state->im->next;
|
|
while (!state->im) {
|
|
if (likely(state->idev != NULL)) {
|
|
read_unlock_bh(&state->idev->lock);
|
|
in6_dev_put(state->idev);
|
|
}
|
|
state->dev = state->dev->next;
|
|
if (!state->dev) {
|
|
state->idev = NULL;
|
|
goto out;
|
|
}
|
|
state->idev = in6_dev_get(state->dev);
|
|
if (!state->idev)
|
|
continue;
|
|
read_lock_bh(&state->idev->lock);
|
|
state->im = state->idev->mc_list;
|
|
}
|
|
if (!state->im)
|
|
break;
|
|
spin_lock_bh(&state->im->mca_lock);
|
|
psf = state->im->mca_sources;
|
|
}
|
|
out:
|
|
return psf;
|
|
}
|
|
|
|
static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
|
|
{
|
|
struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
|
|
if (psf)
|
|
while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
|
|
--pos;
|
|
return pos ? NULL : psf;
|
|
}
|
|
|
|
static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
|
|
{
|
|
read_lock(&dev_base_lock);
|
|
return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
|
|
}
|
|
|
|
static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
|
|
{
|
|
struct ip6_sf_list *psf;
|
|
if (v == SEQ_START_TOKEN)
|
|
psf = igmp6_mcf_get_first(seq);
|
|
else
|
|
psf = igmp6_mcf_get_next(seq, v);
|
|
++*pos;
|
|
return psf;
|
|
}
|
|
|
|
static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
|
|
{
|
|
struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
|
|
if (likely(state->im != NULL)) {
|
|
spin_unlock_bh(&state->im->mca_lock);
|
|
state->im = NULL;
|
|
}
|
|
if (likely(state->idev != NULL)) {
|
|
read_unlock_bh(&state->idev->lock);
|
|
in6_dev_put(state->idev);
|
|
state->idev = NULL;
|
|
}
|
|
state->dev = NULL;
|
|
read_unlock(&dev_base_lock);
|
|
}
|
|
|
|
static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
|
|
{
|
|
struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
|
|
struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
|
|
|
|
if (v == SEQ_START_TOKEN) {
|
|
seq_printf(seq,
|
|
"%3s %6s "
|
|
"%32s %32s %6s %6s\n", "Idx",
|
|
"Device", "Multicast Address",
|
|
"Source Address", "INC", "EXC");
|
|
} else {
|
|
seq_printf(seq,
|
|
"%3d %6.6s "
|
|
"%04x%04x%04x%04x%04x%04x%04x%04x "
|
|
"%04x%04x%04x%04x%04x%04x%04x%04x "
|
|
"%6lu %6lu\n",
|
|
state->dev->ifindex, state->dev->name,
|
|
NIP6(state->im->mca_addr),
|
|
NIP6(psf->sf_addr),
|
|
psf->sf_count[MCAST_INCLUDE],
|
|
psf->sf_count[MCAST_EXCLUDE]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct seq_operations igmp6_mcf_seq_ops = {
|
|
.start = igmp6_mcf_seq_start,
|
|
.next = igmp6_mcf_seq_next,
|
|
.stop = igmp6_mcf_seq_stop,
|
|
.show = igmp6_mcf_seq_show,
|
|
};
|
|
|
|
static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct seq_file *seq;
|
|
int rc = -ENOMEM;
|
|
struct igmp6_mcf_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
|
|
|
|
if (!s)
|
|
goto out;
|
|
|
|
rc = seq_open(file, &igmp6_mcf_seq_ops);
|
|
if (rc)
|
|
goto out_kfree;
|
|
|
|
seq = file->private_data;
|
|
seq->private = s;
|
|
memset(s, 0, sizeof(*s));
|
|
out:
|
|
return rc;
|
|
out_kfree:
|
|
kfree(s);
|
|
goto out;
|
|
}
|
|
|
|
static struct file_operations igmp6_mcf_seq_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = igmp6_mcf_seq_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release_private,
|
|
};
|
|
#endif
|
|
|
|
int __init igmp6_init(struct net_proto_family *ops)
|
|
{
|
|
struct ipv6_pinfo *np;
|
|
struct sock *sk;
|
|
int err;
|
|
|
|
err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6, &igmp6_socket);
|
|
if (err < 0) {
|
|
printk(KERN_ERR
|
|
"Failed to initialize the IGMP6 control socket (err %d).\n",
|
|
err);
|
|
igmp6_socket = NULL; /* For safety. */
|
|
return err;
|
|
}
|
|
|
|
sk = igmp6_socket->sk;
|
|
sk->sk_allocation = GFP_ATOMIC;
|
|
sk->sk_prot->unhash(sk);
|
|
|
|
np = inet6_sk(sk);
|
|
np->hop_limit = 1;
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
proc_net_fops_create("igmp6", S_IRUGO, &igmp6_mc_seq_fops);
|
|
proc_net_fops_create("mcfilter6", S_IRUGO, &igmp6_mcf_seq_fops);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
void igmp6_cleanup(void)
|
|
{
|
|
sock_release(igmp6_socket);
|
|
igmp6_socket = NULL; /* for safety */
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
proc_net_remove("mcfilter6");
|
|
proc_net_remove("igmp6");
|
|
#endif
|
|
}
|