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Diffstat (limited to 'net/bridge/br_multicast.c')
-rw-r--r--net/bridge/br_multicast.c166
1 files changed, 129 insertions, 37 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 073d54afa056..b30e77e8427c 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -365,13 +365,18 @@ static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br,
__be32 group,
u8 *igmp_type)
{
+ struct igmpv3_query *ihv3;
+ size_t igmp_hdr_size;
struct sk_buff *skb;
struct igmphdr *ih;
struct ethhdr *eth;
struct iphdr *iph;
+ igmp_hdr_size = sizeof(*ih);
+ if (br->multicast_igmp_version == 3)
+ igmp_hdr_size = sizeof(*ihv3);
skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) +
- sizeof(*ih) + 4);
+ igmp_hdr_size + 4);
if (!skb)
goto out;
@@ -396,7 +401,7 @@ static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br,
iph->version = 4;
iph->ihl = 6;
iph->tos = 0xc0;
- iph->tot_len = htons(sizeof(*iph) + sizeof(*ih) + 4);
+ iph->tot_len = htons(sizeof(*iph) + igmp_hdr_size + 4);
iph->id = 0;
iph->frag_off = htons(IP_DF);
iph->ttl = 1;
@@ -412,17 +417,37 @@ static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br,
skb_put(skb, 24);
skb_set_transport_header(skb, skb->len);
- ih = igmp_hdr(skb);
*igmp_type = IGMP_HOST_MEMBERSHIP_QUERY;
- ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
- ih->code = (group ? br->multicast_last_member_interval :
- br->multicast_query_response_interval) /
- (HZ / IGMP_TIMER_SCALE);
- ih->group = group;
- ih->csum = 0;
- ih->csum = ip_compute_csum((void *)ih, sizeof(struct igmphdr));
- skb_put(skb, sizeof(*ih));
+ switch (br->multicast_igmp_version) {
+ case 2:
+ ih = igmp_hdr(skb);
+ ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
+ ih->code = (group ? br->multicast_last_member_interval :
+ br->multicast_query_response_interval) /
+ (HZ / IGMP_TIMER_SCALE);
+ ih->group = group;
+ ih->csum = 0;
+ ih->csum = ip_compute_csum((void *)ih, sizeof(*ih));
+ break;
+ case 3:
+ ihv3 = igmpv3_query_hdr(skb);
+ ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY;
+ ihv3->code = (group ? br->multicast_last_member_interval :
+ br->multicast_query_response_interval) /
+ (HZ / IGMP_TIMER_SCALE);
+ ihv3->group = group;
+ ihv3->qqic = br->multicast_query_interval / HZ;
+ ihv3->nsrcs = 0;
+ ihv3->resv = 0;
+ ihv3->suppress = 0;
+ ihv3->qrv = 2;
+ ihv3->csum = 0;
+ ihv3->csum = ip_compute_csum((void *)ihv3, sizeof(*ihv3));
+ break;
+ }
+
+ skb_put(skb, igmp_hdr_size);
__skb_pull(skb, sizeof(*eth));
out:
@@ -434,15 +459,20 @@ static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br,
const struct in6_addr *grp,
u8 *igmp_type)
{
- struct sk_buff *skb;
+ struct mld2_query *mld2q;
+ unsigned long interval;
struct ipv6hdr *ip6h;
struct mld_msg *mldq;
+ size_t mld_hdr_size;
+ struct sk_buff *skb;
struct ethhdr *eth;
u8 *hopopt;
- unsigned long interval;
+ mld_hdr_size = sizeof(*mldq);
+ if (br->multicast_mld_version == 2)
+ mld_hdr_size = sizeof(*mld2q);
skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) +
- 8 + sizeof(*mldq));
+ 8 + mld_hdr_size);
if (!skb)
goto out;
@@ -461,7 +491,7 @@ static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br,
ip6h = ipv6_hdr(skb);
*(__force __be32 *)ip6h = htonl(0x60000000);
- ip6h->payload_len = htons(8 + sizeof(*mldq));
+ ip6h->payload_len = htons(8 + mld_hdr_size);
ip6h->nexthdr = IPPROTO_HOPOPTS;
ip6h->hop_limit = 1;
ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1));
@@ -489,26 +519,47 @@ static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br,
/* ICMPv6 */
skb_set_transport_header(skb, skb->len);
- mldq = (struct mld_msg *) icmp6_hdr(skb);
-
interval = ipv6_addr_any(grp) ?
br->multicast_query_response_interval :
br->multicast_last_member_interval;
-
*igmp_type = ICMPV6_MGM_QUERY;
- 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;
- mldq->mld_mca = *grp;
-
- /* 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));
+ switch (br->multicast_mld_version) {
+ case 1:
+ mldq = (struct mld_msg *)icmp6_hdr(skb);
+ 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;
+ mldq->mld_mca = *grp;
+ mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
+ sizeof(*mldq), IPPROTO_ICMPV6,
+ csum_partial(mldq,
+ sizeof(*mldq),
+ 0));
+ break;
+ case 2:
+ mld2q = (struct mld2_query *)icmp6_hdr(skb);
+ mld2q->mld2q_mrc = ntohs((u16)jiffies_to_msecs(interval));
+ mld2q->mld2q_type = ICMPV6_MGM_QUERY;
+ mld2q->mld2q_code = 0;
+ mld2q->mld2q_cksum = 0;
+ mld2q->mld2q_resv1 = 0;
+ mld2q->mld2q_resv2 = 0;
+ mld2q->mld2q_suppress = 0;
+ mld2q->mld2q_qrv = 2;
+ mld2q->mld2q_nsrcs = 0;
+ mld2q->mld2q_qqic = br->multicast_query_interval / HZ;
+ mld2q->mld2q_mca = *grp;
+ mld2q->mld2q_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
+ sizeof(*mld2q),
+ IPPROTO_ICMPV6,
+ csum_partial(mld2q,
+ sizeof(*mld2q),
+ 0));
+ break;
+ }
+ skb_put(skb, mld_hdr_size);
__skb_pull(skb, sizeof(*eth));
@@ -608,7 +659,8 @@ err:
}
struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
- struct net_bridge_port *port, struct br_ip *group)
+ struct net_bridge_port *p,
+ struct br_ip *group)
{
struct net_bridge_mdb_htable *mdb;
struct net_bridge_mdb_entry *mp;
@@ -624,7 +676,7 @@ struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
}
hash = br_ip_hash(mdb, group);
- mp = br_multicast_get_group(br, port, group, hash);
+ mp = br_multicast_get_group(br, p, group, hash);
switch (PTR_ERR(mp)) {
case 0:
break;
@@ -681,9 +733,9 @@ static int br_multicast_add_group(struct net_bridge *br,
struct net_bridge_port *port,
struct br_ip *group)
{
- struct net_bridge_mdb_entry *mp;
- struct net_bridge_port_group *p;
struct net_bridge_port_group __rcu **pp;
+ struct net_bridge_port_group *p;
+ struct net_bridge_mdb_entry *mp;
unsigned long now = jiffies;
int err;
@@ -861,9 +913,9 @@ static void br_multicast_send_query(struct net_bridge *br,
struct net_bridge_port *port,
struct bridge_mcast_own_query *own_query)
{
- unsigned long time;
- struct br_ip br_group;
struct bridge_mcast_other_query *other_query = NULL;
+ struct br_ip br_group;
+ unsigned long time;
if (!netif_running(br->dev) || br->multicast_disabled ||
!br->multicast_querier)
@@ -1831,7 +1883,9 @@ void br_multicast_init(struct net_bridge *br)
br->ip4_other_query.delay_time = 0;
br->ip4_querier.port = NULL;
+ br->multicast_igmp_version = 2;
#if IS_ENABLED(CONFIG_IPV6)
+ br->multicast_mld_version = 1;
br->ip6_other_query.delay_time = 0;
br->ip6_querier.port = NULL;
#endif
@@ -2132,6 +2186,44 @@ unlock:
return err;
}
+int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val)
+{
+ /* Currently we support only version 2 and 3 */
+ switch (val) {
+ case 2:
+ case 3:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ spin_lock_bh(&br->multicast_lock);
+ br->multicast_igmp_version = val;
+ spin_unlock_bh(&br->multicast_lock);
+
+ return 0;
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val)
+{
+ /* Currently we support version 1 and 2 */
+ switch (val) {
+ case 1:
+ case 2:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ spin_lock_bh(&br->multicast_lock);
+ br->multicast_mld_version = val;
+ spin_unlock_bh(&br->multicast_lock);
+
+ return 0;
+}
+#endif
+
/**
* br_multicast_list_adjacent - Returns snooped multicast addresses
* @dev: The bridge port adjacent to which to retrieve addresses
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.