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| author | Francesco Ruggeri <fruggeri@arista.com> | 2019-03-01 15:31:03 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-03-03 21:05:10 -0800 |
| commit | 9036b2fe092a107856edd1a3bad48b83f2b45000 (patch) | |
| tree | b9e330a8e765941112abcccfe48d968eca75bd4d /net/ipv6 | |
| parent | 46d841105d791b0ab51a1a7ebf48cb4d5416c957 (diff) | |
| download | linux-9036b2fe092a107856edd1a3bad48b83f2b45000.tar.bz2 | |
net: ipv6: add socket option IPV6_ROUTER_ALERT_ISOLATE
By default IPv6 socket with IPV6_ROUTER_ALERT socket option set will
receive all IPv6 RA packets from all namespaces.
IPV6_ROUTER_ALERT_ISOLATE socket option restricts packets received by
the socket to be only from the socket's namespace.
Signed-off-by: Maxim Martynov <maxim@arista.com>
Signed-off-by: Francesco Ruggeri <fruggeri@arista.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/ip6_output.c | 6 | ||||
| -rw-r--r-- | net/ipv6/ipv6_sockglue.c | 10 |
2 files changed, 16 insertions, 0 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index 5f9fa0302b5a..edbd12067170 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -300,6 +300,12 @@ static int ip6_call_ra_chain(struct sk_buff *skb, int sel) if (sk && ra->sel == sel && (!sk->sk_bound_dev_if || sk->sk_bound_dev_if == skb->dev->ifindex)) { + struct ipv6_pinfo *np = inet6_sk(sk); + + if (np && np->rtalert_isolate && + !net_eq(sock_net(sk), dev_net(skb->dev))) { + continue; + } if (last) { struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); if (skb2) diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index 973e215c3114..40f21fef25ff 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -787,6 +787,12 @@ done: goto e_inval; retv = ip6_ra_control(sk, val); break; + case IPV6_ROUTER_ALERT_ISOLATE: + if (optlen < sizeof(int)) + goto e_inval; + np->rtalert_isolate = valbool; + retv = 0; + break; case IPV6_MTU_DISCOVER: if (optlen < sizeof(int)) goto e_inval; @@ -1358,6 +1364,10 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, val = np->rxopt.bits.recvfragsize; break; + case IPV6_ROUTER_ALERT_ISOLATE: + val = np->rtalert_isolate; + break; + default: return -ENOPROTOOPT; } |