nano attachment add

core/include/attachments/nano_attachment.h

@@ -195,7 +195,7 @@ uint16_t GetResponseCode(
 );
 
 ///
-/// @brief Retrieves the redict page data for a response.
+/// @brief Retrieves the redirect page data for a response.
 ///
 /// @param attachment The NanoAttachment object associated with the session.
 /// @param session_data The HttpSessionData object representing the session.
@@ -209,6 +209,21 @@ RedirectPageData GetRedirectPage(
     AttachmentVerdictResponse *response
 );
 
+///
+/// @brief Retrieves the custom response with headers data.
+///
+/// @param attachment The NanoAttachment object associated with the session.
+/// @param session_data The HttpSessionData object representing the session.
+/// @param response The AttachmentVerdictResponse object containing the verdict.
+///
+/// @return CustomResponseWithHeaders structure containing response code, headers, and body.
+///
+CustomResponseWithHeaders * GetCustomResponseWithHeaders(
+    NanoAttachment *attachment,
+    HttpSessionData *session_data,
+    AttachmentVerdictResponse *response
+);
+
 ///
 /// @brief Free allocated resources of an AttachmentVerdictResponse.
 ///

core/include/attachments/nano_attachment_common.h

@@ -21,6 +21,8 @@ typedef int64_t NanoHttpCpInjectPos;
 #define MAX_NGINX_UID_LEN 32
 #define MAX_SHARED_MEM_PATH_LEN 128
 #define NUM_OF_NGINX_IPC_ELEMENTS 200
+// The maximum is 2048, but we limit it to 2000 to avoid Alpine memory page layout issues (SIGBUS)
+#define NUM_OF_NGINX_IPC_ELEMENTS_ASYNC 2000
 #define DEFAULT_KEEP_ALIVE_INTERVAL_MSEC 300000u
 #define SHARED_MEM_PATH "/dev/shm/"
 #define SHARED_REGISTRATION_SIGNAL_PATH SHARED_MEM_PATH "check-point/cp-nano-attachment-registration"
@@ -49,6 +51,7 @@ typedef enum NanoWebResponseType
     CUSTOM_WEB_BLOCK_PAGE_RESPONSE,
     RESPONSE_CODE_ONLY,
     REDIRECT_WEB_RESPONSE,
+    CUSTOM_RESPONSE_WITH_HEADERS,
 
     NO_WEB_RESPONSE
 } NanoWebResponseType;
@@ -220,18 +223,6 @@ typedef enum ServiceVerdict
     TRAFFIC_VERDICT_CUSTOM_RESPONSE
 } ServiceVerdict;
 
-#ifdef __cplusplus
-typedef enum class AttachmentContentType
-#else
-typedef enum AttachmentContentType
-#endif
-{
-    CONTENT_TYPE_APPLICATION_JSON,
-    CONTENT_TYPE_TEXT_HTML,
-    CONTENT_TYPE_TEXT_PLAIN,
-    CONTENT_TYPE_OTHER
-} AttachmentContentType;
-
 #ifdef __cplusplus
 typedef enum class AttachmentVerdict
 #else
@@ -285,12 +276,14 @@ typedef struct __attribute__((__packed__)) HttpWebResponseData {
     } response_data;
 } HttpWebResponseData;
 
-typedef struct __attribute__((__packed__)) HttpJsonResponseData {
+// Custom response structure with dynamic headers
+typedef struct __attribute__((__packed__)) HttpCustomResponseData {
     uint16_t response_code;
     uint16_t body_size;
-    AttachmentContentType content_type;
-    char body[0];
-} HttpJsonResponseData;
+    uint8_t headers_count;
+    char data[0]; // headers followed by body
+    // Memory layout: [HttpHeaderPackedData1][HttpHeaderPackedData2]...[body_data]
+} HttpCustomResponseData;
 
 typedef struct {
     size_t              len;
@@ -307,6 +300,21 @@ typedef struct RedirectData {
     unsigned char redirect_location[REDIRECT_RESPONSE_LOCATION_SIZE];
 } RedirectData;
 
+typedef struct CustomResponseHeaderData {
+    uint16_t key_size;
+    uint16_t value_size;
+    char *key;
+    char *value;
+} CustomResponseHeaderData;
+
+typedef struct CustomResponseWithHeaders {
+    uint16_t response_code;
+    uint16_t body_size;
+    uint8_t headers_count;
+    CustomResponseHeaderData *headers;
+    char *body;
+} CustomResponseWithHeaders;
+
 typedef struct WebResponseData {
     NanoWebResponseType web_response_type;
     unsigned char uuid[UUID_SIZE];
@@ -416,6 +424,13 @@ typedef struct HttpHeaderData {
     nano_str_t value;
 } HttpHeaderData;
 
+// Packed header data structure for dynamic headers in custom responses (IPC transfer)
+typedef struct __attribute__((__packed__)) HttpHeaderPackedData {
+    uint16_t key_size;
+    uint16_t value_size;
+    char data[0]; // key followed by value
+} HttpHeaderPackedData;
+
 typedef struct HttpHeaders {
     HttpHeaderData *data;
     size_t headers_count;
@@ -448,7 +463,7 @@ typedef struct AttachmentData {
 typedef union __attribute__((__packed__)) HttpModifyData {
     HttpInjectData inject_data[0];
     HttpWebResponseData web_response_data[0];
-    HttpJsonResponseData json_response_data[0];
+    HttpCustomResponseData custom_response_data[0];
 } HttpModifyData;
 
 typedef struct __attribute__((__packed__)) HttpReplyFromService {