net-netlink: fix diag to export IPv4 tos for dual-stack IPv6 sockets

Signed-off-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index 68e8ac5..ccee270 100644 (file)
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -108,9 +108,6 @@ static int inet_csk_diag_fill(struct sock *sk,
                       icsk->icsk_ca_ops->name);
        }
 
-       if ((ext & (1 << (INET_DIAG_TOS - 1))) && (sk->sk_family != AF_INET6))
-               RTA_PUT_U8(skb, INET_DIAG_TOS, inet->tos);
-
        r->idiag_family = sk->sk_family;
        r->idiag_state = sk->sk_state;
        r->idiag_timer = 0;
@@ -125,16 +122,23 @@ static int inet_csk_diag_fill(struct sock *sk,
        r->id.idiag_src[0] = inet->inet_rcv_saddr;
        r->id.idiag_dst[0] = inet->inet_daddr;
 
+       /* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
+        * hence this needs to be included regardless of socket family.
+        */
+       if (ext & (1 << (INET_DIAG_TOS - 1)))
+               RTA_PUT_U8(skb, INET_DIAG_TOS, inet->tos);
+
 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
        if (r->idiag_family == AF_INET6) {
                const struct ipv6_pinfo *np = inet6_sk(sk);
 
+               if (ext & (1 << (INET_DIAG_TCLASS - 1)))
+                       RTA_PUT_U8(skb, INET_DIAG_TCLASS, np->tclass);
+
                ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
                               &np->rcv_saddr);
                ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
                               &np->daddr);
-               if (ext & (1 << (INET_DIAG_TCLASS - 1)))
-                       RTA_PUT_U8(skb, INET_DIAG_TCLASS, np->tclass);
        }
 #endif