feat: pass along peername down to transformation context

apps/emqx/src/emqx_channel.erl

@@ -684,7 +684,10 @@ process_publish(Packet = ?PUBLISH_PACKET(QoS, Topic, PacketId), Channel) ->
     end.
 
 packet_to_message(Packet, #channel{
-    conninfo = #{proto_ver := ProtoVer},
+    conninfo = #{
+        peername := PeerName,
+        proto_ver := ProtoVer
+    },
     clientinfo =
         #{
             protocol := Protocol,
@@ -702,6 +705,7 @@ packet_to_message(Packet, #channel{
             ClientId,
             #{
                 client_attrs => ClientAttrs,
+                peername => PeerName,
                 proto_ver => ProtoVer,
                 protocol => Protocol,
                 username => Username,

apps/emqx_message_transformation/test/emqx_message_transformation_http_api_SUITE.erl

@@ -1095,8 +1095,20 @@ t_multiple_transformations(_Config) ->
 
     ?assertMatch(
         [
-            {_, #{data := #{transformation := Name1, event := 'message.transformation_failed'}}},
-            {_, #{data := #{transformation := Name2, event := 'message.transformation_failed'}}}
+            {_, #{
+                data := #{
+                    transformation := Name1,
+                    event := 'message.transformation_failed',
+                    peername := <<_/binary>>
+                }
+            }},
+            {_, #{
+                data := #{
+                    transformation := Name2,
+                    event := 'message.transformation_failed',
+                    peername := <<_/binary>>
+                }
+            }}
         ],
         get_traced_failures_from_rule_engine()
     ),

apps/emqx_rule_engine/src/emqx_rule_events.erl

@@ -573,7 +573,7 @@ eventmsg_transformation_failed(
             clientid => ClientId,
             username => emqx_message:get_header(username, Message, undefined),
             payload => Payload,
-            peerhost => ntoa(emqx_message:get_header(peerhost, Message, undefined)),
+            peername => ntoa(emqx_message:get_header(peername, Message, undefined)),
             topic => Topic,
             qos => QoS,
             flags => Flags,
@@ -1064,7 +1064,7 @@ columns_with_exam('message.transformation_failed') ->
         {<<"clientid">>, <<"c_emqx">>},
         {<<"username">>, <<"u_emqx">>},
         {<<"payload">>, <<"{\"msg\": \"hello\"}">>},
-        {<<"peerhost">>, <<"192.168.0.10">>},
+        {<<"peername">>, <<"192.168.0.10:56431">>},
         {<<"topic">>, <<"t/a">>},
         {<<"qos">>, 1},
         {<<"flags">>, #{}},