Fix kong response body (#49)

* fix large response body

* fix large response body

* fix response body

* fix response body

* fix response body

* fix response body

* fix response body

* fix response body

* fix response body

* fix response body

* fix response body

* fix response body

* fix response body

* fix response body

* fix response body

* fix response body

* fix response body

* fix response body

* fix specific path

* return correct path

* fresh start

* fix send_bodu in lua_attachment_wrapper.c

* change branch

* add timeout

* add timeout

* remove the header filter

* try chunk hashing

* proper fini session

* add more check

* try setting last chunk

* remove finilizing session

* return to basic version

* proper fini of session data

* add some check for internal traffic

* envoy functionality...

* proper fini session

* proper fini session

* fini session on accept also

* for testing change the log level

* remove fini session from header

* remove fini session from header

* remove fini session from header

* remove inpect check

* fix wrong close statement

* correct inspection_complete handling

* fix oom

* fix oom

* fix oom

* fix oom

* fix oom

* fix init attachment

* nano_ffi free memoty

* GC implementation

* optimize

* clean

* increase timeout

* increase timeout

* using is_session_fini, the commit before this one is working ...

* returning to last working version ...

* just for testing

* fix block page

* fix block page

* fix block page

* fix block page

* fix block page

* fix fini session

* add collect(stop)

* return to default

* fix oom caused by using freed values

* fix oom caused by using freed values

* add large response body handling

* implement timeout

* implement timeout

* remove GC

* testing

* add end_inspection

* remove comments

* ngx.arg[1] = nil

* Skip inspection for health checks and internal requests

* add new flag for bypass inspections

* move ngx.arg[1] to the beginning

* try without coolectgarbage

* remove internal traffic check

* remove internal traffic check

* I don't know

* I don't know

* try add chunk assignment

* check why data session is nil in header but availablein body

* remove end inspection

* remove logs

* ctx.timeout_passthrough

* remove ctx.timeout_passthrough

* add GC

* remove the logs

* return the logs

* last modification....

* add logs

* revert to working version

* remove stupid cat

* fini_session only in log phase

* last try

* remove processed_requests

* remove unused variable

* remove nano_ffi changes

* add debuging message for testing

* get worker workers inside the init_attachmetn

* test now

* move check

* add accept

* add accept

* remove endinspection

* fix typo

* get req body in chunks

* test body chunks:

* add timeout in req body

* fixing

* add logs for test

* fix accept verdic in body_filter

* add more logs

* fix ngx time

* add more logs

* add getter functions for timeout

* add more logs

* ready for review

* use right content-length

* add missing content-length update

* try content-length nil

* add nil to header filter

* revert shcema changes

* try exit in header filter

* try content-length nil

* remove the test

* refuse connection when prevnet occures in response body

---------

Co-authored-by: wiaamm <wiaamm@checkpoint.com>

attachments/kong/plugins/open-appsec-waf-kong-plugin/handler.lua

@@ -8,102 +8,113 @@ local NanoHandler = {}
 NanoHandler.PRIORITY = 3000
 NanoHandler.VERSION = "1.0.0"
 
-NanoHandler.sessions = {}
-NanoHandler.processed_requests = {}
-
 function NanoHandler.init_worker()
     nano.init_attachment()
 end
 
--- **Handles Request Headers (DecodeHeaders Equivalent)**
 function NanoHandler.access(conf)
+    local ctx = kong.ctx.plugin
+    
     local headers = kong.request.get_headers()
     local session_id = nano.generate_session_id()
-    kong.service.request.set_header("x-session-id", tostring(session_id))
-
-    if NanoHandler.processed_requests[session_id] then
-        kong.ctx.plugin.blocked = true
-        return
-    end
     
     local session_data = nano.init_session(session_id)
     if not session_data then
-        kong.log.err("Failed to initialize session - failing open")
+        kong.ctx.plugin.cleanup_needed = false
         return
     end
     
-    kong.ctx.plugin.session_data = session_data
+    ctx.session_data = session_data
-    kong.ctx.plugin.session_id = session_id
+    ctx.session_id = session_id
+    if nano.is_session_finalized(session_id) then
+        kong.log.debug("Session has already been inspected, no need for further inspection")
+        return
+    end
 
     local meta_data = nano.handle_start_transaction()
     if not meta_data then
-    kong.log.err("Failed to handle start transaction - failing open")
+        kong.log.debug("Failed to handle start transaction - failing mode")
+        ctx.cleanup_needed = true
         return
     end
 
     local req_headers = nano.handleHeaders(headers)
+    if not req_headers then
+        kong.log.debug("Failed to handle request headers - failing mode")
+        ctx.cleanup_needed = true
+        return
+    end
 
     local has_content_length = tonumber(ngx.var.http_content_length) and tonumber(ngx.var.http_content_length) > 0
     local contains_body = has_content_length and 1 or 0
 
     local verdict, response = nano.send_data(session_id, session_data, meta_data, req_headers, contains_body, nano.HttpChunkType.HTTP_REQUEST_FILTER)
+    if verdict ~= nano.AttachmentVerdict.INSPECT then
+        ctx.cleanup_needed = true
         if verdict == nano.AttachmentVerdict.DROP then
-        nano.fini_session(session_data)
+            return nano.handle_custom_response(session_data, response)
-        kong.ctx.plugin.blocked = true
+        end
-        local result = nano.handle_custom_response(session_data, response)
+        return
-        nano.cleanup_all()
-        return result
     end
 
     if contains_body == 1 then
         local body = kong.request.get_raw_body()
         if body and #body > 0 then
             verdict, response = nano.send_body(session_id, session_data, body, nano.HttpChunkType.HTTP_REQUEST_BODY)
+            if verdict ~= nano.AttachmentVerdict.INSPECT then
+                ctx.cleanup_needed = true
                 if verdict == nano.AttachmentVerdict.DROP then
-                nano.fini_session(session_data)
-                kong.ctx.plugin.blocked = true
-                local result = nano.handle_custom_response(session_data, response)
-                nano.cleanup_all()
-                return result
-            end
-        else
-            kong.log.debug("Request body not in memory, attempting to read from buffer/file")
-
-            local body_data = ngx.var.request_body
-            if body_data and #body_data > 0 then
-                kong.log.debug("Found request body in nginx var, size: ", #body_data)
-                verdict, response = nano.send_body(session_id, session_data, body_data, nano.HttpChunkType.HTTP_REQUEST_BODY)
-                if verdict == nano.AttachmentVerdict.DROP then
-                    nano.fini_session(session_data)
-                    kong.ctx.plugin.blocked = true
                     return nano.handle_custom_response(session_data, response)
                 end
+                return
+            end
         else       
             local body_file = ngx.var.request_body_file
             if body_file then
-                    kong.log.debug("Reading request body from file: ", body_file)
                 local file = io.open(body_file, "rb")
                 if file then
-                        local entire_body = file:read("*all")
+                    local chunk_size = 8192
-                        file:close()
+                    local chunk_count = 0
+                    local start_time = ngx.now()
+                    local timeout_sec = nano.get_request_processing_timeout_sec()
+                    kong.log.debug("Request body reading timeout set to ", timeout_sec, " seconds")
                     
-                        if entire_body and #entire_body > 0 then
+                    while true do
-                            kong.log.debug("Sending entire body of size ", #entire_body, " bytes to C module")
+                        ngx.update_time()
-                            verdict, response = nano.send_body(session_id, session_data, entire_body, nano.HttpChunkType.HTTP_REQUEST_BODY)
+                        local current_time = ngx.now()
+                        local elapsed = current_time - start_time
+                        
+                        if elapsed > timeout_sec then
+                            ctx.cleanup_needed = true
+                            kong.log.warn("Request body reading timeout after ", elapsed, " seconds")
+                            file:close()
+                            return
+                        end
+                        
+                        local chunk = file:read(chunk_size)
+                        if not chunk or #chunk == 0 then
+                            kong.log.debug("End of request body file reached")
+                            break
+                        end
+                        
+                        chunk_count = chunk_count + 1
+                        kong.log.debug("Sending request body chunk ", chunk_count, " of size ", #chunk, " bytes to C module")
+                        verdict, response = nano.send_body(session_id, session_data, chunk, nano.HttpChunkType.HTTP_REQUEST_BODY)
+                        
+                        if verdict ~= nano.AttachmentVerdict.INSPECT then
+                            file:close()
+                            ctx.cleanup_needed = true
                             if verdict == nano.AttachmentVerdict.DROP then
-                                nano.fini_session(session_data)
+                                return nano.handle_custom_response(session_data, response)
-                                kong.ctx.plugin.blocked = true
+                            end
-                                local result = nano.handle_custom_response(session_data, response)
+                            return
-                                nano.cleanup_all()
+                        end
-                                return result
+                    end
+                    file:close()
+                    kong.log.debug("Sent ", chunk_count, " chunks from request body file")
                 end
             else
-                            kong.log.debug("Empty body file")
+                kong.log.err("Request body expected but no body data or file available")
-                        end
-                    end
-                else
-                    kong.log.warn("Request body expected but no body data or file available")
-                end
             end
         end
 
@@ -112,119 +123,150 @@ function NanoHandler.access(conf)
         end)
 
         if not ok then
-            kong.log.err("Error ending request inspection: ", verdict, " - failing open")
+            kong.log.debug("Error ending request inspection: ", verdict, " - failing open")
-            nano.fini_session(session_data)
+            ctx.cleanup_needed = true
-            nano.cleanup_all()
             return
         end
 
+        if verdict ~= nano.AttachmentVerdict.INSPECT then
+            ctx.cleanup_needed = true
             if verdict == nano.AttachmentVerdict.DROP then
-            nano.fini_session(session_data)
+                return nano.handle_custom_response(session_data, response)
-            kong.ctx.plugin.blocked = true
-            local result = nano.handle_custom_response(session_data, response)
-            nano.cleanup_all()
-            return result
             end
-    else
+            return
-        verdict, response = nano.end_inspection(session_id, session_data, nano.HttpChunkType.HTTP_REQUEST_END)
-        if verdict == nano.AttachmentVerdict.DROP then
-            nano.fini_session(session_data)
-            kong.ctx.plugin.blocked = true
-            local result = nano.handle_custom_response(session_data, response)
-            nano.cleanup_all()
-            return result
         end
     end
-
-    NanoHandler.processed_requests[session_id] = true
 end
 
 function NanoHandler.header_filter(conf)
     local ctx = kong.ctx.plugin
-    if ctx.blocked then
+    if nano.is_session_finalized(ctx.session_data) then
+        kong.log.debug("Session has already been inspected, no need for further inspection")
+        return
+    end
+
+    if ctx.cleanup_needed then
+        kong.log.debug("cleanup in header_filter, passing through")
         return
     end
 
     local session_id = ctx.session_id
     local session_data = ctx.session_data
 
-    if not session_id or not session_data then
+    local headers = kong.response.get_headers()
-        kong.log.err("No session data found in header_filter")
+    local header_data = nano.handleHeaders(headers)
+    
+    if not header_data then
+        kong.log.debug("Failed to handle response headers - failing open")
+        ctx.cleanup_needed = true
         return
     end
 
-    local headers = kong.response.get_headers()
-    local header_data = nano.handleHeaders(headers)
     local status_code = kong.response.get_status()
     local content_length = tonumber(headers["content-length"]) or 0
     
     local verdict, response = nano.send_response_headers(session_id, session_data, header_data, status_code, content_length)
+    if verdict ~= nano.AttachmentVerdict.INSPECT then
+        ctx.cleanup_needed = true
         if verdict == nano.AttachmentVerdict.DROP then
-        kong.ctx.plugin.blocked = true
+            kong.log.debug("DROP verdict in header_filter - sending block response immediately")
-        nano.fini_session(session_data)
-        nano.cleanup_all()
             return nano.handle_custom_response(session_data, response)
         end
+        ngx.header["Content-Length"] = nil
+        return
+    end
+
+    ngx.header["Content-Length"] = nil
     
     ctx.expect_body = not (status_code == 204 or status_code == 304 or (100 <= status_code and status_code < 200) or content_length == 0)
 end
 
 function NanoHandler.body_filter(conf)
     local ctx = kong.ctx.plugin
-    if ctx.blocked then
+    local chunk = ngx.arg[1]
-        return
+    local eof = ngx.arg[2]
-    end
     
     local session_id = ctx.session_id
     local session_data = ctx.session_data
     
-    if not session_id or not session_data or ctx.session_finalized then
+    if nano.is_session_finalized(session_data) then
+        kong.log.debug("Session has already been inspected, no need for further inspection")
         return
     end
     
-    local body = kong.response.get_raw_body()
+    if ctx.cleanup_needed then
+        kong.log.debug("cleanup chunk without inspection, passing through")
+        return
+    end
 
-    if body then
+    if not ctx.body_filter_start_time then
-        ctx.body_seen = true
+        ctx.body_filter_start_time = ngx.now()
-        local verdict, response, modifications = nano.send_body(session_id, session_data, body, nano.HttpChunkType.HTTP_RESPONSE_BODY)
+        ctx.body_filter_timeout_sec = nano.get_response_processing_timeout_sec()
+        kong.log.debug("body_filter timeout set to ", ctx.body_filter_timeout_sec, " seconds")
+    end
     
-        -- Initialize if not exists
+    local elapsed_time = ngx.now() - ctx.body_filter_start_time
+    if elapsed_time > ctx.body_filter_timeout_sec then
+        kong.log.warn("Body filter timeout after ", elapsed_time, " seconds - failing open")
+        ctx.cleanup_needed = true
+        return
+    end
+
+    if chunk and #chunk > 0 then
         ctx.body_buffer_chunk = ctx.body_buffer_chunk or 0
+        ctx.body_seen = true
+
+        local verdict, response, modifications = nano.send_body(session_id, session_data, chunk, nano.HttpChunkType.HTTP_RESPONSE_BODY)
         
-        -- Handle body modifications if any
         if modifications then
-            body = nano.handle_body_modifications(body, modifications, ctx.body_buffer_chunk)
+            chunk = nano.handle_body_modifications(chunk, modifications, ctx.body_buffer_chunk)
-            kong.response.set_raw_body(body)
         end
 
         ctx.body_buffer_chunk = ctx.body_buffer_chunk + 1
 
+        if verdict ~= nano.AttachmentVerdict.INSPECT then
+            ctx.cleanup_needed = true
             if verdict == nano.AttachmentVerdict.DROP then
-            nano.fini_session(session_data)
+                kong.log.debug("DROP verdict during response streaming - closing connection")
-            ctx.session_finalized = true
+                ngx.header["Connection"] = "close"
-            local result = nano.handle_custom_response(session_data, response)
+                ngx.arg[1] = ""
-            -- Clean up allocated memory
+                ngx.arg[2] = true
-            nano.cleanup_all()
+                return
-            return result
             end
+        end
+        
+        ngx.arg[1] = chunk
         return
     end
 
+    if eof then
         if ctx.body_seen or ctx.expect_body == false then
+            ctx.cleanup_needed = true
             local verdict, response = nano.end_inspection(session_id, session_data, nano.HttpChunkType.HTTP_RESPONSE_END)
+            if verdict ~= nano.AttachmentVerdict.INSPECT then
+                kong.log.debug("Final verdict after end_inspection: ", verdict)
+                ctx.cleanup_needed = true
                 if verdict == nano.AttachmentVerdict.DROP then
-            nano.fini_session(session_data)
+                    kong.log.debug("DROP verdict at EOF - closing connection")
-            ctx.session_finalized = true
+                    ngx.header["Connection"] = "close"
-            local result = nano.handle_custom_response(session_data, response)
+                    ngx.arg[1] = ""
-            -- Clean up allocated memory
+                    ngx.arg[2] = true
-            nano.cleanup_all()
+                    return
-            return result
+                end
+            end
         end
         
-        nano.fini_session(session_data)
+    end
-        -- Clean up allocated memory
+end
+
+function NanoHandler.log(conf)
+    local ctx = kong.ctx.plugin
+    if ctx.cleanup_needed then
+        nano.fini_session(ctx.session_data)
         nano.cleanup_all()
-        ctx.session_finalized = true
+        ctx.session_data = nil
+        ctx.session_id = nil
+        collectgarbage("collect")
     end
 end
 

attachments/kong/plugins/open-appsec-waf-kong-plugin/lua_attachment_wrapper.c

@@ -507,6 +507,30 @@ static int lua_free_verdict_response(lua_State *L) {
     return 0;
 }
 
+static int lua_get_request_processing_timeout_msec(lua_State *L) {
+    NanoAttachment* attachment = (NanoAttachment*)lua_touserdata(L, 1);
+    if (!attachment) {
+        lua_pushinteger(L, 3000);
+        return 1;
+    }
+
+    uint32_t timeout = GetRequestProcessingTimeout(attachment);
+    lua_pushinteger(L, timeout);
+    return 1;
+}
+
+static int lua_get_response_processing_timeout_msec(lua_State *L) {
+    NanoAttachment* attachment = (NanoAttachment*)lua_touserdata(L, 1);
+    if (!attachment) {
+        lua_pushinteger(L, 3000);
+        return 1;
+    }
+
+    uint32_t timeout = GetResponseProcessingTimeout(attachment);
+    lua_pushinteger(L, timeout);
+    return 1;
+}
+
 static const struct luaL_Reg nano_attachment_lib[] = {
     {"init_nano_attachment", lua_init_nano_attachment},
     {"get_web_response_type", lua_get_web_response_type},
@@ -529,6 +553,8 @@ static const struct luaL_Reg nano_attachment_lib[] = {
     {"free_verdict_response", lua_free_verdict_response},
     {"send_body", lua_send_body},
     {"end_inspection", lua_end_inspection},
+    {"get_request_processing_timeout_msec", lua_get_request_processing_timeout_msec},
+    {"get_response_processing_timeout_msec", lua_get_response_processing_timeout_msec},
     {NULL, NULL}
 };
 

attachments/kong/plugins/open-appsec-waf-kong-plugin/nano_ffi.lua

@@ -5,7 +5,6 @@ local nano = {}
 
 nano.session_counter = 0
 nano.attachments = {}
-nano.num_workers = ngx.worker.count() or 1
 nano.allocated_strings = {}
 nano.allocate_headers = {}
 nano.allocated_metadata = {}
@@ -82,13 +81,14 @@ function nano.generate_session_id()
     return tonumber(string.format("%d%05d", worker_id, nano.session_counter))
 end
 
-function nano.handle_custom_response(session_data, response)
+-- Returns: status_code, body, headers
+function nano.get_custom_response_data(session_data, response)
     local worker_id = ngx.worker.id()
     local attachment = nano.attachments[worker_id]
 
     if not attachment then
         kong.log.warn("Cannot handle custom response: Attachment not available for worker ", worker_id, " - failing open")
-        return kong.response.exit(200, "Request allowed due to attachment unavailability")
+        return 200, "Request allowed due to attachment unavailability", {}
     end
 
     local response_type = nano_attachment.get_web_response_type(attachment, session_data, response)
@@ -100,18 +100,19 @@ function nano.handle_custom_response(session_data, response)
             code = 403
         end
         kong.log.debug("Response code only: ", code)
-        return kong.response.exit(code, "")
+        return code, "", {}
     end
 
     if response_type == nano.WebResponseType.REDIRECT_WEB_RESPONSE then
         local location = nano_attachment.get_redirect_page(attachment, session_data, response)
-        return kong.response.exit(307, "", { ["Location"] = location })
+        local code = nano_attachment.get_response_code(response) or 307
+        return code, "", { ["Location"] = location }
     end
 
     local block_page = nano_attachment.get_block_page(attachment, session_data, response)
     if not block_page then
-        kong.log.err("Failed to retrieve custom block page for session ", session_data)
+        kong.log.debug("Failed to retrieve custom block page for session ", session_data)
-        return kong.response.exit(500, { message = "Internal Server Error" })
+        return 403, "", {}
     end
     local code = nano_attachment.get_response_code(response)
     if not code or code < 100 or code > 599 then
@@ -119,8 +120,13 @@ function nano.handle_custom_response(session_data, response)
         code = 403
     end
     kong.log.debug("Block page response with code: ", code)
-    return kong.response.exit(code, block_page, { ["Content-Type"] = "text/html" })
+    return code, block_page, { ["Content-Type"] = "text/html" }
+end
 
+-- Wrapper for backward compatibility - calls kong.response.exit() in access phase
+function nano.handle_custom_response(session_data, response)
+    local code, body, headers = nano.get_custom_response_data(session_data, response)
+    return kong.response.exit(code, body, headers)
 end
 
 
@@ -178,15 +184,15 @@ end
 
 function nano.init_attachment()
     local worker_id = ngx.worker.id()
+    local num_workers = ngx.worker.count() or 1  -- Get count dynamically
     local attachment, err
     local retries = 3
 
     for attempt = 1, retries do
-        attachment, err = nano_attachment.init_nano_attachment(worker_id, nano.num_workers)
+        attachment, err = nano_attachment.init_nano_attachment(worker_id, num_workers)
         if attachment then
             break
         end
-
         kong.log.err("Worker ", worker_id, " failed to initialize attachment (attempt ", attempt, "/", retries, "): ", err)
     end
 
@@ -228,8 +234,8 @@ function nano.is_session_finalized(session_data)
     local attachment = nano.attachments[worker_id]
 
     if not attachment or not session_data then
-        kong.log.err("Cannot check session finalization: Invalid attachment or session_data")
+        kong.log.debug("Cannot check session finalization: Invalid attachment or session_data")
-        return false
+        return true
     end
 
     return nano_attachment.is_session_finalized(attachment, session_data)
@@ -256,7 +262,6 @@ function nano.handle_start_transaction()
     )
 
     table.insert(nano.allocated_metadata, metadata)
-
     collectgarbage("stop")
 
     return metadata
@@ -295,7 +300,6 @@ function nano.handleHeaders(headers)
     end
 
     nano_attachment.setHeaderCount(header_data, index)
-
     return header_data
 end
 
@@ -468,7 +472,7 @@ function nano.end_inspection(session_id, session_data, chunk_type)
     end
 
     if not session_data then
-        kong.log.err("Cannot end inspection: Invalid session_data for session ", session_id)
+        kong.log.debug("Cannot end inspection: Invalid session_data for session ", session_id)
         return nano.AttachmentVerdict.INSPECT, nil
     end
 
@@ -481,4 +485,30 @@ function nano.end_inspection(session_id, session_data, chunk_type)
     return verdict, response
 end
 
+function nano.get_request_processing_timeout_sec()
+    local worker_id = ngx.worker.id()
+    local attachment = nano.attachments[worker_id]
+
+    if not attachment then
+        kong.log.warn("Attachment not available for worker ", worker_id, " - using default timeout")
+        return 3
+    end
+
+    local timeout_msec = nano_attachment.get_request_processing_timeout_msec(attachment)
+    return timeout_msec / 1000.0
+end
+
+function nano.get_response_processing_timeout_sec()
+    local worker_id = ngx.worker.id()
+    local attachment = nano.attachments[worker_id]
+
+    if not attachment then
+        kong.log.warn("Attachment not available for worker ", worker_id, " - using default timeout")
+        return 3
+    end
+
+    local timeout_msec = nano_attachment.get_response_processing_timeout_msec(attachment)
+    return timeout_msec / 1000.0
+end
+
 return nano

attachments/kong/plugins/open-appsec-waf-kong-plugin/open-appsec-waf-kong-plugin-1.0.0-1.rockspec

@@ -3,7 +3,7 @@ version = "1.0.0-1"
 
 source = {
   url = "git://github.com/openappsec/attachment.git",
-  tag = "main"
+  branch = "fix-kong-response-body"
 }
 
 description = {

attachments/nano_attachment/nano_attachment.c

@@ -622,3 +622,22 @@ freeCompressedBody(NanoAttachment *attachment, HttpSessionData *session_data, Ht
 {
     nano_free_compressed_body(attachment, bodies, session_data);
 }
+
+uint32_t
+GetRequestProcessingTimeout(NanoAttachment *attachment)
+{
+    if (attachment == NULL) {
+        return 3000;
+    }
+    return attachment->req_max_proccessing_ms_time;
+}
+
+uint32_t
+GetResponseProcessingTimeout(NanoAttachment *attachment)
+{
+    if (attachment == NULL) {
+        return 3000;
+    }
+    return attachment->res_max_proccessing_ms_time;
+}
+

core/include/attachments/nano_attachment.h

@@ -266,4 +266,28 @@ freeCompressedBody(
     HttpBody *bodies
 );
 
+///
+/// @brief Gets the request processing timeout in milliseconds.
+///
+/// This function retrieves the configured timeout value for request processing
+/// from the NanoAttachment configuration.
+///
+/// @param attachment A pointer to the NanoAttachment structure.
+///
+/// @return The request processing timeout in milliseconds.
+///
+uint32_t GetRequestProcessingTimeout(NanoAttachment *attachment);
+
+///
+/// @brief Gets the response processing timeout in milliseconds.
+///
+/// This function retrieves the configured timeout value for response processing
+/// from the NanoAttachment configuration.
+///
+/// @param attachment A pointer to the NanoAttachment structure.
+///
+/// @return The response processing timeout in milliseconds.
+///
+uint32_t GetResponseProcessingTimeout(NanoAttachment *attachment);
+
 #endif // __NANO_ATTACHMENT_H__