[PATCH net-next] net: Update raw socket bind to consider l3 domain

[David Ahern]

Binding a raw socket to a local address fails if the socket is bound
to an L3 domain:

    $ vrf-test  -s -l 10.100.1.2 -R -I red
    error binding socket: 99: Cannot assign requested address

Update raw_bind to look consider if sk_bound_dev_if is bound to an L3
domain and use inet_addr_type_table to lookup the address.

Signed-off-by: David Ahern <d...@cumulusnetworks.com>
---
 net/ipv4/raw.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index 6a0bd68a565b..9ef2a602f052 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -695,12 +695,20 @@ static int raw_bind(struct sock *sk, struct sockaddr 
*uaddr, int addr_len)
 {
        struct inet_sock *inet = inet_sk(sk);
        struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
+       u32 tb_id = RT_TABLE_LOCAL;
        int ret = -EINVAL;
        int chk_addr_ret;
 
        if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in))
                goto out;
-       chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr);
+
+       if (sk->sk_bound_dev_if)
+               tb_id = l3mdev_fib_table_by_index(sock_net(sk),
+                                                sk->sk_bound_dev_if) ? : tb_id;
+
+       chk_addr_ret = inet_addr_type_table(sock_net(sk), addr->sin_addr.s_addr,
+                                           tb_id);
+
        ret = -EADDRNOTAVAIL;
        if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL &&
            chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST)
-- 
2.1.4