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fix(coap): reject duplicated connection request

This commit is contained in:
JianBo He 2022-03-21 16:22:47 +08:00
parent 053f9b422c
commit 670749493b
1 changed files with 23 additions and 3 deletions
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26
apps/emqx_gateway/src/coap/emqx_coap_channel.erl
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@ -595,7 +595,8 @@ process_out(Outs, Result, Channel, _) ->
process_nothing(_, _, Channel) ->
{ok, Channel}.
process_connection({open, Req}, Result, Channel, Iter) ->
process_connection({open, Req}, Result,
Channel = #channel{conn_state = idle}, Iter) ->
Queries = emqx_coap_message:get_option(uri_query, Req),
case emqx_misc:pipeline(
[ fun enrich_conninfo/2
@ -610,12 +611,31 @@ process_connection({open, Req}, Result, Channel, Iter) ->
process_connect(ensure_connected(NChannel), Req, Result, Iter);
{error, ReasonCode, NChannel} ->
ErrMsg = io_lib:format("Login Failed: ~ts", [ReasonCode]),
Payload = erlang:list_to_binary(lists:flatten(ErrMsg)),
Payload = iolist_to_binary(ErrMsg),
iter(Iter,
reply({error, bad_request}, Payload, Req, Result),
NChannel)
end;
process_connection({open, Req}, Result,
Channel = #channel{
conn_state = ConnState,
clientinfo = #{clientid := ClientId}}, Iter)
when ConnState == connected ->
Queries = emqx_coap_message:get_option(uri_query, Req),
ErrMsg0 =
case Queries of
#{<<"clientid">> := ClientId} ->
"client has connected";
#{<<"clientid">> := ReqClientId} ->
["channel has registered by: ", ReqClientId];
_ ->
"invalid queries"
end,
ErrMsg = io_lib:format("Bad Request: ~ts", [ErrMsg0]),
Payload = iolist_to_binary(ErrMsg),
iter(Iter,
reply({error, bad_request}, Payload, Req, Result),
Channel);
process_connection({close, Msg}, _, Channel, _) ->
Reply = emqx_coap_message:piggyback({ok, deleted}, Msg),
{shutdown, close, Reply, Channel}.