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net: ipv4: add second dif to multicast source filter 

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern 2017-08-07 08:44:19 -07:00 committed by David S. Miller
parent 67359930e1
commit 60d9b03141
4 changed files with 8 additions and 5 deletions
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3
include/linux/igmp.h
View File

@ -118,7 +118,8 @@ extern int ip_mc_msfget(struct sock *sk, struct ip_msfilter *msf,
struct ip_msfilter __user *optval, int __user *optlen);
extern int ip_mc_gsfget(struct sock *sk, struct group_filter *gsf,
struct group_filter __user *optval, int __user *optlen);
extern int ip_mc_sf_allow(struct sock *sk, __be32 local, __be32 rmt, int dif);
extern int ip_mc_sf_allow(struct sock *sk, __be32 local, __be32 rmt,
int dif, int sdif);
extern void ip_mc_init_dev(struct in_device *);
extern void ip_mc_destroy_dev(struct in_device *);
extern void ip_mc_up(struct in_device *);

6
net/ipv4/igmp.c
View File

@ -2549,7 +2549,8 @@ int ip_mc_gsfget(struct sock *sk, struct group_filter *gsf,
/*
* check if a multicast source filter allows delivery for a given <src,dst,intf>
*/
int ip_mc_sf_allow(struct sock *sk, __be32 loc_addr, __be32 rmt_addr, int dif)
int ip_mc_sf_allow(struct sock *sk, __be32 loc_addr, __be32 rmt_addr,
int dif, int sdif)
{
struct inet_sock *inet = inet_sk(sk);
struct ip_mc_socklist *pmc;
@ -2564,7 +2565,8 @@ int ip_mc_sf_allow(struct sock *sk, __be32 loc_addr, __be32 rmt_addr, int dif)
rcu_read_lock();
for_each_pmc_rcu(inet, pmc) {
if (pmc->multi.imr_multiaddr.s_addr == loc_addr &&
pmc->multi.imr_ifindex == dif)
(pmc->multi.imr_ifindex == dif ||
(sdif && pmc->multi.imr_ifindex == sdif)))
break;
}
ret = inet->mc_all;

2
net/ipv4/raw.c
View File

@ -193,7 +193,7 @@ static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash)
delivered = 1;
if ((iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) &&
ip_mc_sf_allow(sk, iph->daddr, iph->saddr,
skb->dev->ifindex)) {
skb->dev->ifindex, sdif)) {
struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
/* Not releasing hash table! */

2
net/ipv4/udp.c
View File

@ -606,7 +606,7 @@ static inline bool __udp_is_mcast_sock(struct net *net, struct sock *sk,
(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif &&
sk->sk_bound_dev_if != sdif))
return false;
if (!ip_mc_sf_allow(sk, loc_addr, rmt_addr, dif))
if (!ip_mc_sf_allow(sk, loc_addr, rmt_addr, dif, sdif))
return false;
return true;
}