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Merge branch 'net-next-2.6_20100423a/br/br_multicast_v3' of git://git.linux-ipv6.org/gitroot/yoshfuji/linux-2.6-next

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This commit is contained in:
David S. Miller 2010-04-23 23:37:24 -07:00
parent 4b340ae20d 08b202b672
commit b7d6a43211
5 changed files with 694 additions and 156 deletions
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75
include/net/mld.h Normal file
View file

@ -0,0 +1,75 @@
#ifndef LINUX_MLD_H
#define LINUX_MLD_H
#include <linux/in6.h>
#include <linux/icmpv6.h>
/* MLDv1 Query/Report/Done */
struct mld_msg {
struct icmp6hdr mld_hdr;
struct in6_addr mld_mca;
};
#define mld_type mld_hdr.icmp6_type
#define mld_code mld_hdr.icmp6_code
#define mld_cksum mld_hdr.icmp6_cksum
#define mld_maxdelay mld_hdr.icmp6_maxdelay
#define mld_reserved mld_hdr.icmp6_dataun.un_data16[1]
/* Multicast Listener Discovery version 2 headers */
/* MLDv2 Report */
struct mld2_grec {
__u8 grec_type;
__u8 grec_auxwords;
__be16 grec_nsrcs;
struct in6_addr grec_mca;
struct in6_addr grec_src[0];
};
struct mld2_report {
struct icmp6hdr mld2r_hdr;
struct mld2_grec mld2r_grec[0];
};
#define mld2r_type mld2r_hdr.icmp6_type
#define mld2r_resv1 mld2r_hdr.icmp6_code
#define mld2r_cksum mld2r_hdr.icmp6_cksum
#define mld2r_resv2 mld2r_hdr.icmp6_dataun.un_data16[0]
#define mld2r_ngrec mld2r_hdr.icmp6_dataun.un_data16[1]
/* MLDv2 Query */
struct mld2_query {
struct icmp6hdr mld2q_hdr;
struct in6_addr mld2q_mca;
#if defined(__LITTLE_ENDIAN_BITFIELD)
__u8 mld2q_qrv:3,
mld2q_suppress:1,
mld2q_resv2:4;
#elif defined(__BIG_ENDIAN_BITFIELD)
__u8 mld2q_resv2:4,
mld2q_suppress:1,
mld2q_qrv:3;
#else
#error "Please fix <asm/byteorder.h>"
#endif
__u8 mld2q_qqic;
__be16 mld2q_nsrcs;
struct in6_addr mld2q_srcs[0];
};
#define mld2q_type mld2q_hdr.icmp6_type
#define mld2q_code mld2q_hdr.icmp6_code
#define mld2q_cksum mld2q_hdr.icmp6_cksum
#define mld2q_mrc mld2q_hdr.icmp6_maxdelay
#define mld2q_resv1 mld2q_hdr.icmp6_dataun.un_data16[1]
/* Max Response Code */
#define MLDV2_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
#define MLDV2_EXP(thresh, nbmant, nbexp, value) \
((value) < (thresh) ? (value) : \
((MLDV2_MASK(value, nbmant) | (1<<(nbmant))) << \
(MLDV2_MASK((value) >> (nbmant), nbexp) + (nbexp))))
#define MLDV2_MRC(value) MLDV2_EXP(0x8000, 12, 3, value)
#endif

6
net/bridge/Kconfig
View file

@ -33,14 +33,14 @@ config BRIDGE
If unsure, say N.
config BRIDGE_IGMP_SNOOPING
bool "IGMP snooping"
bool "IGMP/MLD snooping"
depends on BRIDGE
depends on INET
default y
---help---
If you say Y here, then the Ethernet bridge will be able selectively
forward multicast traffic based on IGMP traffic received from each
port.
forward multicast traffic based on IGMP/MLD traffic received from
each port.
Say N to exclude this support and reduce the binary size.

619
net/bridge/br_multicast.c
View file

@ -24,51 +24,138 @@
#include <linux/slab.h>
#include <linux/timer.h>
#include <net/ip.h>
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
#include <net/ipv6.h>
#include <net/mld.h>
#include <net/addrconf.h>
#endif
#include "br_private.h"
static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb, __be32 ip)
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static inline int ipv6_is_local_multicast(const struct in6_addr *addr)
{
if (ipv6_addr_is_multicast(addr) &&
IPV6_ADDR_MC_SCOPE(addr) <= IPV6_ADDR_SCOPE_LINKLOCAL)
return 1;
return 0;
}
#endif
static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b)
{
if (a->proto != b->proto)
return 0;
switch (a->proto) {
case htons(ETH_P_IP):
return a->u.ip4 == b->u.ip4;
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
case htons(ETH_P_IPV6):
return ipv6_addr_equal(&a->u.ip6, &b->u.ip6);
#endif
}
return 0;
}
static inline int __br_ip4_hash(struct net_bridge_mdb_htable *mdb, __be32 ip)
{
return jhash_1word(mdb->secret, (__force u32)ip) & (mdb->max - 1);
}
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static inline int __br_ip6_hash(struct net_bridge_mdb_htable *mdb,
const struct in6_addr *ip)
{
return jhash2((__force u32 *)ip->s6_addr32, 4, mdb->secret) & (mdb->max - 1);
}
#endif
static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb,
struct br_ip *ip)
{
switch (ip->proto) {
case htons(ETH_P_IP):
return __br_ip4_hash(mdb, ip->u.ip4);
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
case htons(ETH_P_IPV6):
return __br_ip6_hash(mdb, &ip->u.ip6);
#endif
}
return 0;
}
static struct net_bridge_mdb_entry *__br_mdb_ip_get(
struct net_bridge_mdb_htable *mdb, __be32 dst, int hash)
struct net_bridge_mdb_htable *mdb, struct br_ip *dst, int hash)
{
struct net_bridge_mdb_entry *mp;
struct hlist_node *p;
hlist_for_each_entry_rcu(mp, p, &mdb->mhash[hash], hlist[mdb->ver]) {
if (dst == mp->addr)
if (br_ip_equal(&mp->addr, dst))
return mp;
}
return NULL;
}
static struct net_bridge_mdb_entry *br_mdb_ip_get(
static struct net_bridge_mdb_entry *br_mdb_ip4_get(
struct net_bridge_mdb_htable *mdb, __be32 dst)
{
if (!mdb)
return NULL;
struct br_ip br_dst;
br_dst.u.ip4 = dst;
br_dst.proto = htons(ETH_P_IP);
return __br_mdb_ip_get(mdb, &br_dst, __br_ip4_hash(mdb, dst));
}
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static struct net_bridge_mdb_entry *br_mdb_ip6_get(
struct net_bridge_mdb_htable *mdb, const struct in6_addr *dst)
{
struct br_ip br_dst;
ipv6_addr_copy(&br_dst.u.ip6, dst);
br_dst.proto = htons(ETH_P_IPV6);
return __br_mdb_ip_get(mdb, &br_dst, __br_ip6_hash(mdb, dst));
}
#endif
static struct net_bridge_mdb_entry *br_mdb_ip_get(
struct net_bridge_mdb_htable *mdb, struct br_ip *dst)
{
return __br_mdb_ip_get(mdb, dst, br_ip_hash(mdb, dst));
}
struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
struct sk_buff *skb)
{
if (br->multicast_disabled)
struct net_bridge_mdb_htable *mdb = br->mdb;
struct br_ip ip;
if (!mdb || br->multicast_disabled)
return NULL;
if (BR_INPUT_SKB_CB(skb)->igmp)
return NULL;
ip.proto = skb->protocol;
switch (skb->protocol) {
case htons(ETH_P_IP):
if (BR_INPUT_SKB_CB(skb)->igmp)
break;
return br_mdb_ip_get(br->mdb, ip_hdr(skb)->daddr);
ip.u.ip4 = ip_hdr(skb)->daddr;
break;
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
case htons(ETH_P_IPV6):
ipv6_addr_copy(&ip.u.ip6, &ipv6_hdr(skb)->daddr);
break;
#endif
default:
return NULL;
}
return NULL;
return br_mdb_ip_get(mdb, &ip);
}
static void br_mdb_free(struct rcu_head *head)
@ -95,7 +182,7 @@ static int br_mdb_copy(struct net_bridge_mdb_htable *new,
for (i = 0; i < old->max; i++)
hlist_for_each_entry(mp, p, &old->mhash[i], hlist[old->ver])
hlist_add_head(&mp->hlist[new->ver],
&new->mhash[br_ip_hash(new, mp->addr)]);
&new->mhash[br_ip_hash(new, &mp->addr)]);
if (!elasticity)
return 0;
@ -163,7 +250,7 @@ static void br_multicast_del_pg(struct net_bridge *br,
struct net_bridge_port_group *p;
struct net_bridge_port_group **pp;
mp = br_mdb_ip_get(mdb, pg->addr);
mp = br_mdb_ip_get(mdb, &pg->addr);
if (WARN_ON(!mp))
return;
@ -249,8 +336,8 @@ out:
return 0;
}
static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br,
__be32 group)
static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br,
__be32 group)
{
struct sk_buff *skb;
struct igmphdr *ih;
@ -314,12 +401,104 @@ out:
return skb;
}
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br,
struct in6_addr *group)
{
struct sk_buff *skb;
struct ipv6hdr *ip6h;
struct mld_msg *mldq;
struct ethhdr *eth;
u8 *hopopt;
unsigned long interval;
skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) +
8 + sizeof(*mldq));
if (!skb)
goto out;
skb->protocol = htons(ETH_P_IPV6);
/* Ethernet header */
skb_reset_mac_header(skb);
eth = eth_hdr(skb);
memcpy(eth->h_source, br->dev->dev_addr, 6);
ipv6_eth_mc_map(group, eth->h_dest);
eth->h_proto = htons(ETH_P_IPV6);
skb_put(skb, sizeof(*eth));
/* IPv6 header + HbH option */
skb_set_network_header(skb, skb->len);
ip6h = ipv6_hdr(skb);
*(__force __be32 *)ip6h = htonl(0x60000000);
ip6h->payload_len = 8 + sizeof(*mldq);
ip6h->nexthdr = IPPROTO_HOPOPTS;
ip6h->hop_limit = 1;
ipv6_addr_set(&ip6h->saddr, 0, 0, 0, 0);
ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1));
hopopt = (u8 *)(ip6h + 1);
hopopt[0] = IPPROTO_ICMPV6; /* next hdr */
hopopt[1] = 0; /* length of HbH */
hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */
hopopt[3] = 2; /* Length of RA Option */
hopopt[4] = 0; /* Type = 0x0000 (MLD) */
hopopt[5] = 0;
hopopt[6] = IPV6_TLV_PAD0; /* Pad0 */
hopopt[7] = IPV6_TLV_PAD0; /* Pad0 */
skb_put(skb, sizeof(*ip6h) + 8);
/* ICMPv6 */
skb_set_transport_header(skb, skb->len);
mldq = (struct mld_msg *) icmp6_hdr(skb);
interval = ipv6_addr_any(group) ? br->multicast_last_member_interval :
br->multicast_query_response_interval;
mldq->mld_type = ICMPV6_MGM_QUERY;
mldq->mld_code = 0;
mldq->mld_cksum = 0;
mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval));
mldq->mld_reserved = 0;
ipv6_addr_copy(&mldq->mld_mca, group);
/* checksum */
mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
sizeof(*mldq), IPPROTO_ICMPV6,
csum_partial(mldq,
sizeof(*mldq), 0));
skb_put(skb, sizeof(*mldq));
__skb_pull(skb, sizeof(*eth));
out:
return skb;
}
#endif
static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br,
struct br_ip *addr)
{
switch (addr->proto) {
case htons(ETH_P_IP):
return br_ip4_multicast_alloc_query(br, addr->u.ip4);
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
case htons(ETH_P_IPV6):
return br_ip6_multicast_alloc_query(br, &addr->u.ip6);
#endif
}
return NULL;
}
static void br_multicast_send_group_query(struct net_bridge_mdb_entry *mp)
{
struct net_bridge *br = mp->br;
struct sk_buff *skb;
skb = br_multicast_alloc_query(br, mp->addr);
skb = br_multicast_alloc_query(br, &mp->addr);
if (!skb)
goto timer;
@ -353,7 +532,7 @@ static void br_multicast_send_port_group_query(struct net_bridge_port_group *pg)
struct net_bridge *br = port->br;
struct sk_buff *skb;
skb = br_multicast_alloc_query(br, pg->addr);
skb = br_multicast_alloc_query(br, &pg->addr);
if (!skb)
goto timer;
@ -383,8 +562,8 @@ out:
}
static struct net_bridge_mdb_entry *br_multicast_get_group(
struct net_bridge *br, struct net_bridge_port *port, __be32 group,
int hash)
struct net_bridge *br, struct net_bridge_port *port,
struct br_ip *group, int hash)
{
struct net_bridge_mdb_htable *mdb = br->mdb;
struct net_bridge_mdb_entry *mp;
@ -396,9 +575,8 @@ static struct net_bridge_mdb_entry *br_multicast_get_group(
hlist_for_each_entry(mp, p, &mdb->mhash[hash], hlist[mdb->ver]) {
count++;
if (unlikely(group == mp->addr)) {
if (unlikely(br_ip_equal(group, &mp->addr)))
return mp;
}
}
elasticity = 0;
@ -463,7 +641,8 @@ err:
}
static struct net_bridge_mdb_entry *br_multicast_new_group(
struct net_bridge *br, struct net_bridge_port *port, __be32 group)
struct net_bridge *br, struct net_bridge_port *port,
struct br_ip *group)
{
struct net_bridge_mdb_htable *mdb = br->mdb;
struct net_bridge_mdb_entry *mp;
@ -496,7 +675,7 @@ rehash:
goto out;
mp->br = br;
mp->addr = group;
mp->addr = *group;
setup_timer(&mp->timer, br_multicast_group_expired,
(unsigned long)mp);
setup_timer(&mp->query_timer, br_multicast_group_query_expired,
@ -510,7 +689,8 @@ out:
}
static int br_multicast_add_group(struct net_bridge *br,
struct net_bridge_port *port, __be32 group)
struct net_bridge_port *port,
struct br_ip *group)
{
struct net_bridge_mdb_entry *mp;
struct net_bridge_port_group *p;
@ -518,9 +698,6 @@ static int br_multicast_add_group(struct net_bridge *br,
unsigned long now = jiffies;
int err;
if (ipv4_is_local_multicast(group))
return 0;
spin_lock(&br->multicast_lock);
if (!netif_running(br->dev) ||
(port && port->state == BR_STATE_DISABLED))
@ -549,7 +726,7 @@ static int br_multicast_add_group(struct net_bridge *br,
if (unlikely(!p))
goto err;
p->addr = group;
p->addr = *group;
p->port = port;
p->next = *pp;
hlist_add_head(&p->mglist, &port->mglist);
@ -570,6 +747,38 @@ err:
return err;
}
static int br_ip4_multicast_add_group(struct net_bridge *br,
struct net_bridge_port *port,
__be32 group)
{
struct br_ip br_group;
if (ipv4_is_local_multicast(group))
return 0;
br_group.u.ip4 = group;
br_group.proto = htons(ETH_P_IP);
return br_multicast_add_group(br, port, &br_group);
}
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static int br_ip6_multicast_add_group(struct net_bridge *br,
struct net_bridge_port *port,
const struct in6_addr *group)
{
struct br_ip br_group;
if (ipv6_is_local_multicast(group))
return 0;
ipv6_addr_copy(&br_group.u.ip6, group);
br_group.proto = htons(ETH_P_IP);
return br_multicast_add_group(br, port, &br_group);
}
#endif
static void br_multicast_router_expired(unsigned long data)
{
struct net_bridge_port *port = (void *)data;
@ -591,19 +800,15 @@ static void br_multicast_local_router_expired(unsigned long data)
{
}
static void br_multicast_send_query(struct net_bridge *br,
struct net_bridge_port *port, u32 sent)
static void __br_multicast_send_query(struct net_bridge *br,
struct net_bridge_port *port,
struct br_ip *ip)
{
unsigned long time;
struct sk_buff *skb;
if (!netif_running(br->dev) || br->multicast_disabled ||
timer_pending(&br->multicast_querier_timer))
return;
skb = br_multicast_alloc_query(br, 0);
skb = br_multicast_alloc_query(br, ip);
if (!skb)
goto timer;
return;
if (port) {
__skb_push(skb, sizeof(struct ethhdr));
@ -612,8 +817,28 @@ static void br_multicast_send_query(struct net_bridge *br,
dev_queue_xmit);
} else
netif_rx(skb);
}
static void br_multicast_send_query(struct net_bridge *br,
struct net_bridge_port *port, u32 sent)
{
unsigned long time;
struct br_ip br_group;
if (!netif_running(br->dev) || br->multicast_disabled ||
timer_pending(&br->multicast_querier_timer))
return;
memset(&br_group.u, 0, sizeof(br_group.u));
br_group.proto = htons(ETH_P_IP);
__br_multicast_send_query(br, port, &br_group);
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
br_group.proto = htons(ETH_P_IPV6);
__br_multicast_send_query(br, port, &br_group);
#endif
timer:
time = jiffies;
time += sent < br->multicast_startup_query_count ?
br->multicast_startup_query_interval :
@ -698,9 +923,9 @@ void br_multicast_disable_port(struct net_bridge_port *port)
spin_unlock(&br->multicast_lock);
}
static int br_multicast_igmp3_report(struct net_bridge *br,
struct net_bridge_port *port,
struct sk_buff *skb)
static int br_ip4_multicast_igmp3_report(struct net_bridge *br,
struct net_bridge_port *port,
struct sk_buff *skb)
{
struct igmpv3_report *ih;
struct igmpv3_grec *grec;
@ -745,7 +970,7 @@ static int br_multicast_igmp3_report(struct net_bridge *br,
continue;
}
err = br_multicast_add_group(br, port, group);
err = br_ip4_multicast_add_group(br, port, group);
if (err)
break;
}
@ -753,6 +978,66 @@ static int br_multicast_igmp3_report(struct net_bridge *br,
return err;
}
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static int br_ip6_multicast_mld2_report(struct net_bridge *br,
struct net_bridge_port *port,
struct sk_buff *skb)
{
struct icmp6hdr *icmp6h;
struct mld2_grec *grec;
int i;
int len;
int num;
int err = 0;
if (!pskb_may_pull(skb, sizeof(*icmp6h)))
return -EINVAL;
icmp6h = icmp6_hdr(skb);
num = ntohs(icmp6h->icmp6_dataun.un_data16[1]);
len = sizeof(*icmp6h);
for (i = 0; i < num; i++) {
__be16 *nsrcs, _nsrcs;
nsrcs = skb_header_pointer(skb,
len + offsetof(struct mld2_grec,
grec_mca),
sizeof(_nsrcs), &_nsrcs);
if (!nsrcs)
return -EINVAL;
if (!pskb_may_pull(skb,
len + sizeof(*grec) +
sizeof(struct in6_addr) * (*nsrcs)))
return -EINVAL;
grec = (struct mld2_grec *)(skb->data + len);
len += sizeof(*grec) + sizeof(struct in6_addr) * (*nsrcs);
/* We treat these as MLDv1 reports for now. */
switch (grec->grec_type) {
case MLD2_MODE_IS_INCLUDE:
case MLD2_MODE_IS_EXCLUDE:
case MLD2_CHANGE_TO_INCLUDE:
case MLD2_CHANGE_TO_EXCLUDE:
case MLD2_ALLOW_NEW_SOURCES:
case MLD2_BLOCK_OLD_SOURCES:
break;
default:
continue;
}
err = br_ip6_multicast_add_group(br, port, &grec->grec_mca);
if (!err)
break;
}
return err;
}
#endif
static void br_multicast_add_router(struct net_bridge *br,
struct net_bridge_port *port)
{
@ -800,7 +1085,7 @@ timer:
static void br_multicast_query_received(struct net_bridge *br,
struct net_bridge_port *port,
__be32 saddr)
int saddr)
{
if (saddr)
mod_timer(&br->multicast_querier_timer,
@ -811,9 +1096,9 @@ static void br_multicast_query_received(struct net_bridge *br,
br_multicast_mark_router(br, port);
}
static int br_multicast_query(struct net_bridge *br,
struct net_bridge_port *port,
struct sk_buff *skb)
static int br_ip4_multicast_query(struct net_bridge *br,
struct net_bridge_port *port,
struct sk_buff *skb)
{
struct iphdr *iph = ip_hdr(skb);
struct igmphdr *ih = igmp_hdr(skb);
@ -831,7 +1116,7 @@ static int br_multicast_query(struct net_bridge *br,
(port && port->state == BR_STATE_DISABLED))
goto out;
br_multicast_query_received(br, port, iph->saddr);
br_multicast_query_received(br, port, !!iph->saddr);
group = ih->group;
@ -859,7 +1144,7 @@ static int br_multicast_query(struct net_bridge *br,
if (!group)
goto out;
mp = br_mdb_ip_get(br->mdb, group);
mp = br_mdb_ip4_get(br->mdb, group);
if (!mp)
goto out;
@ -883,9 +1168,78 @@ out:
return err;
}
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static int br_ip6_multicast_query(struct net_bridge *br,
struct net_bridge_port *port,
struct sk_buff *skb)
{
struct ipv6hdr *ip6h = ipv6_hdr(skb);
struct mld_msg *mld = (struct mld_msg *) icmp6_hdr(skb);
struct net_bridge_mdb_entry *mp;
struct mld2_query *mld2q;
struct net_bridge_port_group *p, **pp;
unsigned long max_delay;
unsigned long now = jiffies;
struct in6_addr *group = NULL;
int err = 0;
spin_lock(&br->multicast_lock);
if (!netif_running(br->dev) ||
(port && port->state == BR_STATE_DISABLED))
goto out;
br_multicast_query_received(br, port, !ipv6_addr_any(&ip6h->saddr));
if (skb->len == sizeof(*mld)) {
if (!pskb_may_pull(skb, sizeof(*mld))) {
err = -EINVAL;
goto out;
}
mld = (struct mld_msg *) icmp6_hdr(skb);
max_delay = msecs_to_jiffies(htons(mld->mld_maxdelay));
if (max_delay)
group = &mld->mld_mca;
} else if (skb->len >= sizeof(*mld2q)) {
if (!pskb_may_pull(skb, sizeof(*mld2q))) {
err = -EINVAL;
goto out;
}
mld2q = (struct mld2_query *)icmp6_hdr(skb);
if (!mld2q->mld2q_nsrcs)
group = &mld2q->mld2q_mca;
max_delay = mld2q->mld2q_mrc ? MLDV2_MRC(mld2q->mld2q_mrc) : 1;
}
if (!group)
goto out;
mp = br_mdb_ip6_get(br->mdb, group);
if (!mp)
goto out;
max_delay *= br->multicast_last_member_count;
if (!hlist_unhashed(&mp->mglist) &&
(timer_pending(&mp->timer) ?
time_after(mp->timer.expires, now + max_delay) :
try_to_del_timer_sync(&mp->timer) >= 0))
mod_timer(&mp->timer, now + max_delay);
for (pp = &mp->ports; (p = *pp); pp = &p->next) {
if (timer_pending(&p->timer) ?
time_after(p->timer.expires, now + max_delay) :
try_to_del_timer_sync(&p->timer) >= 0)
mod_timer(&mp->timer, now + max_delay);
}
out:
spin_unlock(&br->multicast_lock);
return err;
}
#endif
static void br_multicast_leave_group(struct net_bridge *br,
struct net_bridge_port *port,
__be32 group)
struct br_ip *group)
{
struct net_bridge_mdb_htable *mdb;
struct net_bridge_mdb_entry *mp;
@ -893,9 +1247,6 @@ static void br_multicast_leave_group(struct net_bridge *br,
unsigned long now;
unsigned long time;
if (ipv4_is_local_multicast(group))
return;
spin_lock(&br->multicast_lock);
if (!netif_running(br->dev) ||
(port && port->state == BR_STATE_DISABLED) ||
@ -946,6 +1297,38 @@ out:
spin_unlock(&br->multicast_lock);
}
static void br_ip4_multicast_leave_group(struct net_bridge *br,
struct net_bridge_port *port,
__be32 group)
{
struct br_ip br_group;
if (ipv4_is_local_multicast(group))
return;
br_group.u.ip4 = group;
br_group.proto = htons(ETH_P_IP);
br_multicast_leave_group(br, port, &br_group);
}
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static void br_ip6_multicast_leave_group(struct net_bridge *br,
struct net_bridge_port *port,
const struct in6_addr *group)
{
struct br_ip br_group;
if (ipv6_is_local_multicast(group))
return;
ipv6_addr_copy(&br_group.u.ip6, group);
br_group.proto = htons(ETH_P_IPV6);
br_multicast_leave_group(br, port, &br_group);
}
#endif
static int br_multicast_ipv4_rcv(struct net_bridge *br,
struct net_bridge_port *port,
struct sk_buff *skb)
@ -1023,16 +1406,16 @@ static int br_multicast_ipv4_rcv(struct net_bridge *br,
case IGMP_HOST_MEMBERSHIP_REPORT:
case IGMPV2_HOST_MEMBERSHIP_REPORT:
BR_INPUT_SKB_CB(skb2)->mrouters_only = 1;
err = br_multicast_add_group(br, port, ih->group);
err = br_ip4_multicast_add_group(br, port, ih->group);
break;
case IGMPV3_HOST_MEMBERSHIP_REPORT:
err = br_multicast_igmp3_report(br, port, skb2);
err = br_ip4_multicast_igmp3_report(br, port, skb2);
break;
case IGMP_HOST_MEMBERSHIP_QUERY:
err = br_multicast_query(br, port, skb2);
err = br_ip4_multicast_query(br, port, skb2);
break;
case IGMP_HOST_LEAVE_MESSAGE:
br_multicast_leave_group(br, port, ih->group);
br_ip4_multicast_leave_group(br, port, ih->group);
break;
}
@ -1044,6 +1427,126 @@ err_out:
return err;
}
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static int br_multicast_ipv6_rcv(struct net_bridge *br,
struct net_bridge_port *port,
struct sk_buff *skb)
{
struct sk_buff *skb2 = skb;
struct ipv6hdr *ip6h;
struct icmp6hdr *icmp6h;
u8 nexthdr;
unsigned len;
unsigned offset;
int err;
BR_INPUT_SKB_CB(skb)->igmp = 0;
BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
if (!pskb_may_pull(skb, sizeof(*ip6h)))
return -EINVAL;
ip6h = ipv6_hdr(skb);
/*
* We're interested in MLD messages only.
* - Version is 6
* - MLD has always Router Alert hop-by-hop option
* - But we do not support jumbrograms.
*/
if (ip6h->version != 6 ||
ip6h->nexthdr != IPPROTO_HOPOPTS ||
ip6h->payload_len == 0)
return 0;
len = ntohs(ip6h->payload_len);
if (skb->len < len)
return -EINVAL;
nexthdr = ip6h->nexthdr;
offset = ipv6_skip_exthdr(skb, sizeof(*ip6h), &nexthdr);
if (offset < 0 || nexthdr != IPPROTO_ICMPV6)
return 0;
/* Okay, we found ICMPv6 header */
skb2 = skb_clone(skb, GFP_ATOMIC);
if (!skb2)
return -ENOMEM;
len -= offset - skb_network_offset(skb2);
__skb_pull(skb2, offset);
skb_reset_transport_header(skb2);
err = -EINVAL;
if (!pskb_may_pull(skb2, sizeof(*icmp6h)))
goto out;
icmp6h = icmp6_hdr(skb2);
switch (icmp6h->icmp6_type) {
case ICMPV6_MGM_QUERY:
case ICMPV6_MGM_REPORT:
case ICMPV6_MGM_REDUCTION:
case ICMPV6_MLD2_REPORT:
break;
default:
err = 0;
goto out;
}
/* Okay, we found MLD message. Check further. */
if (skb2->len > len) {
err = pskb_trim_rcsum(skb2, len);
if (err)
goto out;
}
switch (skb2->ip_summed) {
case CHECKSUM_COMPLETE:
if (!csum_fold(skb2->csum))
break;
/*FALLTHROUGH*/
case CHECKSUM_NONE:
skb2->csum = 0;
if (skb_checksum_complete(skb2))
goto out;
}
err = 0;
BR_INPUT_SKB_CB(skb)->igmp = 1;
switch (icmp6h->icmp6_type) {
case ICMPV6_MGM_REPORT:
{
struct mld_msg *mld = (struct mld_msg *)icmp6h;
BR_INPUT_SKB_CB(skb2)->mrouters_only = 1;
err = br_ip6_multicast_add_group(br, port, &mld->mld_mca);
break;
}
case ICMPV6_MLD2_REPORT:
err = br_ip6_multicast_mld2_report(br, port, skb2);
break;
case ICMPV6_MGM_QUERY:
err = br_ip6_multicast_query(br, port, skb2);
break;
case ICMPV6_MGM_REDUCTION:
{
struct mld_msg *mld = (struct mld_msg *)icmp6h;
br_ip6_multicast_leave_group(br, port, &mld->mld_mca);
}
}
out:
__skb_push(skb2, offset);
if (skb2 != skb)
kfree_skb(skb2);
return err;
}
#endif
int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
struct sk_buff *skb)
{
@ -1053,6 +1556,10 @@ int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
switch (skb->protocol) {
case htons(ETH_P_IP):
return br_multicast_ipv4_rcv(br, port, skb);
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
case htons(ETH_P_IPV6):
return br_multicast_ipv6_rcv(br, port, skb);
#endif
}
return 0;

15
net/bridge/br_private.h
View file

@ -45,6 +45,17 @@ struct mac_addr
unsigned char addr[6];
};
struct br_ip
{
union {
__be32 ip4;
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
struct in6_addr ip6;
#endif
} u;
__be16 proto;
};
struct net_bridge_fdb_entry
{
struct hlist_node hlist;
@ -64,7 +75,7 @@ struct net_bridge_port_group {
struct rcu_head rcu;
struct timer_list timer;
struct timer_list query_timer;
__be32 addr;
struct br_ip addr;
u32 queries_sent;
};
@ -77,7 +88,7 @@ struct net_bridge_mdb_entry
struct rcu_head rcu;
struct timer_list timer;
struct timer_list query_timer;
__be32 addr;
struct br_ip addr;
u32 queries_sent;
};

135
net/ipv6/mcast.c
View file

@ -44,6 +44,7 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <net/mld.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv6.h>
@ -71,54 +72,11 @@
#define MDBG(x)
#endif
/*
* These header formats should be in a separate include file, but icmpv6.h
* doesn't have in6_addr defined in all cases, there is no __u128, and no
* other files reference these.
*
* +-DLS 4/14/03
*/
/* Multicast Listener Discovery version 2 headers */
struct mld2_grec {
__u8 grec_type;
__u8 grec_auxwords;
__be16 grec_nsrcs;
struct in6_addr grec_mca;
struct in6_addr grec_src[0];
};
struct mld2_report {
__u8 type;
__u8 resv1;
__sum16 csum;
__be16 resv2;
__be16 ngrec;
struct mld2_grec grec[0];
};
struct mld2_query {
__u8 type;
__u8 code;
__sum16 csum;
__be16 mrc;
__be16 resv1;
struct in6_addr mca;
#if defined(__LITTLE_ENDIAN_BITFIELD)
__u8 qrv:3,
suppress:1,
resv2:4;
#elif defined(__BIG_ENDIAN_BITFIELD)
__u8 resv2:4,
suppress:1,
qrv:3;
#else
#error "Please fix <asm/byteorder.h>"
#endif
__u8 qqic;
__be16 nsrcs;
struct in6_addr srcs[0];
/* Ensure that we have struct in6_addr aligned on 32bit word. */
static void *__mld2_query_bugs[] __attribute__((__unused__)) = {
BUILD_BUG_ON_NULL(offsetof(struct mld2_query, mld2q_srcs) % 4),
BUILD_BUG_ON_NULL(offsetof(struct mld2_report, mld2r_grec) % 4),
BUILD_BUG_ON_NULL(offsetof(struct mld2_grec, grec_mca) % 4)
};
static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
@ -157,14 +115,6 @@ static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
((idev)->mc_v1_seen && \
time_before(jiffies, (idev)->mc_v1_seen)))
#define MLDV2_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
#define MLDV2_EXP(thresh, nbmant, nbexp, value) \
((value) < (thresh) ? (value) : \
((MLDV2_MASK(value, nbmant) | (1<<(nbmant))) << \
(MLDV2_MASK((value) >> (nbmant), nbexp) + (nbexp))))
#define MLDV2_MRC(value) MLDV2_EXP(0x8000, 12, 3, value)
#define IPV6_MLD_MAX_MSF 64
int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF;
@ -1161,7 +1111,7 @@ int igmp6_event_query(struct sk_buff *skb)
struct in6_addr *group;
unsigned long max_delay;
struct inet6_dev *idev;
struct icmp6hdr *hdr;
struct mld_msg *mld;
int group_type;
int mark = 0;
int len;
@ -1182,8 +1132,8 @@ int igmp6_event_query(struct sk_buff *skb)
if (idev == NULL)
return 0;
hdr = icmp6_hdr(skb);
group = (struct in6_addr *) (hdr + 1);
mld = (struct mld_msg *)icmp6_hdr(skb);
group = &mld->mld_mca;
group_type = ipv6_addr_type(group);
if (group_type != IPV6_ADDR_ANY &&
@ -1197,7 +1147,7 @@ int igmp6_event_query(struct sk_buff *skb)
/* MLDv1 router present */
/* Translate milliseconds to jiffies */
max_delay = (ntohs(hdr->icmp6_maxdelay)*HZ)/1000;
max_delay = (ntohs(mld->mld_maxdelay)*HZ)/1000;
switchback = (idev->mc_qrv + 1) * max_delay;
idev->mc_v1_seen = jiffies + switchback;
@ -1216,14 +1166,14 @@ int igmp6_event_query(struct sk_buff *skb)
return -EINVAL;
}
mlh2 = (struct mld2_query *)skb_transport_header(skb);
max_delay = (MLDV2_MRC(ntohs(mlh2->mrc))*HZ)/1000;
max_delay = (MLDV2_MRC(ntohs(mlh2->mld2q_mrc))*HZ)/1000;
if (!max_delay)
max_delay = 1;
idev->mc_maxdelay = max_delay;
if (mlh2->qrv)
idev->mc_qrv = mlh2->qrv;
if (mlh2->mld2q_qrv)
idev->mc_qrv = mlh2->mld2q_qrv;
if (group_type == IPV6_ADDR_ANY) { /* general query */
if (mlh2->nsrcs) {
if (mlh2->mld2q_nsrcs) {
in6_dev_put(idev);
return -EINVAL; /* no sources allowed */
}
@ -1232,9 +1182,9 @@ int igmp6_event_query(struct sk_buff *skb)
return 0;
}
/* mark sources to include, if group & source-specific */
if (mlh2->nsrcs != 0) {
if (mlh2->mld2q_nsrcs != 0) {
if (!pskb_may_pull(skb, srcs_offset +
ntohs(mlh2->nsrcs) * sizeof(struct in6_addr))) {
ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr))) {
in6_dev_put(idev);
return -EINVAL;
}
@ -1270,7 +1220,7 @@ int igmp6_event_query(struct sk_buff *skb)
ma->mca_flags &= ~MAF_GSQUERY;
}
if (!(ma->mca_flags & MAF_GSQUERY) ||
mld_marksources(ma, ntohs(mlh2->nsrcs), mlh2->srcs))
mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs))
igmp6_group_queried(ma, max_delay);
spin_unlock_bh(&ma->mca_lock);
break;
@ -1286,9 +1236,8 @@ int igmp6_event_query(struct sk_buff *skb)
int igmp6_event_report(struct sk_buff *skb)
{
struct ifmcaddr6 *ma;
struct in6_addr *addrp;
struct inet6_dev *idev;
struct icmp6hdr *hdr;
struct mld_msg *mld;
int addr_type;
/* Our own report looped back. Ignore it. */
@ -1300,10 +1249,10 @@ int igmp6_event_report(struct sk_buff *skb)
skb->pkt_type != PACKET_BROADCAST)
return 0;
if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr)))
return -EINVAL;
hdr = icmp6_hdr(skb);
mld = (struct mld_msg *)icmp6_hdr(skb);
/* Drop reports with not link local source */
addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr);
@ -1311,8 +1260,6 @@ int igmp6_event_report(struct sk_buff *skb)
!(addr_type&IPV6_ADDR_LINKLOCAL))
return -EINVAL;
addrp = (struct in6_addr *) (hdr + 1);
idev = in6_dev_get(skb->dev);
if (idev == NULL)
return -ENODEV;
@ -1323,7 +1270,7 @@ int igmp6_event_report(struct sk_buff *skb)
read_lock_bh(&idev->lock);
for (ma = idev->mc_list; ma; ma=ma->next) {
if (ipv6_addr_equal(&ma->mca_addr, addrp)) {
if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) {
spin_lock(&ma->mca_lock);
if (del_timer(&ma->mca_timer))
atomic_dec(&ma->mca_refcnt);
@ -1432,11 +1379,11 @@ static struct sk_buff *mld_newpack(struct net_device *dev, int size)
skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data);
skb_put(skb, sizeof(*pmr));
pmr = (struct mld2_report *)skb_transport_header(skb);
pmr->type = ICMPV6_MLD2_REPORT;
pmr->resv1 = 0;
pmr->csum = 0;
pmr->resv2 = 0;
pmr->ngrec = 0;
pmr->mld2r_type = ICMPV6_MLD2_REPORT;
pmr->mld2r_resv1 = 0;
pmr->mld2r_cksum = 0;
pmr->mld2r_resv2 = 0;
pmr->mld2r_ngrec = 0;
return skb;
}
@ -1458,9 +1405,10 @@ static void mld_sendpack(struct sk_buff *skb)
mldlen = skb->tail - skb->transport_header;
pip6->payload_len = htons(payload_len);
pmr->csum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
IPPROTO_ICMPV6, csum_partial(skb_transport_header(skb),
mldlen, 0));
pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
IPPROTO_ICMPV6,
csum_partial(skb_transport_header(skb),
mldlen, 0));
dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr);
@ -1521,7 +1469,7 @@ static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
pgr->grec_nsrcs = 0;
pgr->grec_mca = pmc->mca_addr; /* structure copy */
pmr = (struct mld2_report *)skb_transport_header(skb);
pmr->ngrec = htons(ntohs(pmr->ngrec)+1);
pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1);
*ppgr = pgr;
return skb;
}
@ -1557,7 +1505,7 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
/* EX and TO_EX get a fresh packet, if needed */
if (truncate) {
if (pmr && pmr->ngrec &&
if (pmr && pmr->mld2r_ngrec &&
AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
if (skb)
mld_sendpack(skb);
@ -1770,9 +1718,8 @@ static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
struct sock *sk = net->ipv6.igmp_sk;
struct inet6_dev *idev;
struct sk_buff *skb;
struct icmp6hdr *hdr;
struct mld_msg *hdr;
const struct in6_addr *snd_addr, *saddr;
struct in6_addr *addrp;
struct in6_addr addr_buf;
int err, len, payload_len, full_len;
u8 ra[8] = { IPPROTO_ICMPV6, 0,
@ -1820,16 +1767,14 @@ static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
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;
hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg));
memset(hdr, 0, sizeof(struct mld_msg));
hdr->mld_type = type;
ipv6_addr_copy(&hdr->mld_mca, addr);
addrp = (struct in6_addr *) skb_put(skb, sizeof(struct in6_addr));
ipv6_addr_copy(addrp, addr);
hdr->icmp6_cksum = csum_ipv6_magic(saddr, snd_addr, len,
IPPROTO_ICMPV6,
csum_partial(hdr, len, 0));
hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len,
IPPROTO_ICMPV6,
csum_partial(hdr, len, 0));
idev = in6_dev_get(skb->dev);