[PATCH 1/3] hwsim: remove 'optimization' sending to only known MACs

[James Prestwood <prestwoj@gmail.com>]

Based on the comment hwsim would only send frames to known MACs
which on its face seems reasonable. But in reality there shouldn't
ever be frames going to unknown MACs, at least not unknown to the
kernel. We can hit this case, though, when using network namespaces.
Each namespace is siloed and hwsim instances only know about radios
in that namespace.

In order to support hwsim and namespaces, this restriction is
being removed.
---
 tools/hwsim.c | 33 ---------------------------------
 1 file changed, 33 deletions(-)

diff --git a/tools/hwsim.c b/tools/hwsim.c
index 47352ad4..10a9db5f 100644
--- a/tools/hwsim.c
+++ b/tools/hwsim.c
@@ -1501,43 +1501,10 @@ static void process_frame(struct hwsim_frame *frame)
 		struct send_frame_info *send_info;
 		bool drop = drop_mcast;
 		uint32_t delay = 0;
-		const struct l_queue_entry *i;
 
 		if (radio == frame->src_radio)
 			continue;
 
-		/*
-		 * The kernel hwsim medium passes multicast frames to all
-		 * radios that are on the same frequency as this frame but
-		 * the netlink medium API only lets userspace pass frames to
-		 * radios by known hardware address.  It does check that the
-		 * receiving radio is on the same frequency though so we can
-		 * send to all known addresses.
-		 *
-		 * If the frame's Receiver Address (RA) is a multicast
-		 * address, then send the frame to every radio that is
-		 * registered.  If it's a unicast address then optimize
-		 * by only forwarding the frame to the radios that have
-		 * at least one interface with this specific address.
-		 */
-		if (!util_is_broadcast_address(frame->dst_ether_addr)) {
-			for (i = l_queue_get_entries(interface_info);
-					i; i = i->next) {
-				struct interface_info_rec *interface = i->data;
-
-				if (interface->radio_rec != radio)
-					continue;
-
-				if (!memcmp(interface->addr,
-						frame->dst_ether_addr,
-						ETH_ALEN))
-					break;
-			}
-
-			if (!i)
-				continue;
-		}
-
 		process_rules(frame->src_radio, radio, frame, false,
 				&drop, &delay);
 
-- 
2.25.1