mctp: Allow keys matching any local address

Currently, we require an exact match on an incoming packet's dest
address, and the key's local_addr field.

In a future change, we may want to set up a key before packets are
routed, meaning we have no local address to match on.

This change allows key lookups to match on local_addr = MCTP_ADDR_ANY.

Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/mctp/route.c b/net/mctp/route.c
index 654467a..35f72e9 100644 (file)
--- a/net/mctp/route.c
+++ b/net/mctp/route.c
@@ -76,7 +76,7 @@ static struct mctp_sock *mctp_lookup_bind(struct net *net, struct sk_buff *skb)
 static bool mctp_key_match(struct mctp_sk_key *key, mctp_eid_t local,
                           mctp_eid_t peer, u8 tag)
 {
-       if (key->local_addr != local)
+       if (!mctp_address_matches(key->local_addr, local))
                return false;
 
        if (key->peer_addr != peer)
@@ -616,7 +616,7 @@ static struct mctp_sk_key *mctp_alloc_local_tag(struct mctp_sock *msk,
                        continue;
 
                if (!(mctp_address_matches(tmp->peer_addr, daddr) &&
-                     tmp->local_addr == saddr))
+                     mctp_address_matches(tmp->local_addr, saddr)))
                        continue;
 
                spin_lock(&tmp->lock);

diff --git a/net/mctp/test/route-test.c b/net/mctp/test/route-test.c
index dad6bff..61205cf 100644 (file)
--- a/net/mctp/test/route-test.c
+++ b/net/mctp/test/route-test.c
@@ -645,6 +645,14 @@ static const struct mctp_route_input_sk_keys_test mctp_route_input_sk_keys_tests
                .hdr = RX_HDR(1, 11, 8, FL_S | FL_E | FL_T(1)),
                .deliver = true,
        },
+       {
+               .name = "any local match",
+               .key_peer_addr = 12,
+               .key_local_addr = MCTP_ADDR_ANY,
+               .key_tag = 1,
+               .hdr = RX_HDR(1, 12, 8, FL_S | FL_E | FL_T(1)),
+               .deliver = true,
+       },
 };
 
 static void mctp_route_input_sk_keys_to_desc(