--- httpd-2.0/include/util_filter.h	2004/09/12 15:50:43	1.84
+++ httpd-2.0/include/util_filter.h	2004/09/21 10:14:40	minimal-patch
@@ -197,6 +197,7 @@
  */
 
 typedef struct ap_filter_rec_t ap_filter_rec_t;
+typedef struct ap_filter_provider_t ap_filter_provider_t;
 
 /**
  * This structure is used for recording information about the
@@ -205,6 +206,11 @@
  *
  * At the moment, these are simply linked in a chain, so a ->next pointer
  * is available.
+ *
+ * It is used for any filter that can be inserted in the filter chain.
+ * This may be either a httpd-2.0 filter or a mod_filter harness.
+ * In the latter case it contains dispatch, provider and protocol information.
+ * In the former case, the new fields (from dispatch) are ignored.
  */
 struct ap_filter_rec_t {
     /** The registered name for this filter */
@@ -225,6 +231,25 @@
 
     /** The next filter_rec in the list */
     struct ap_filter_rec_t *next;
+
+    /** Dispatch criteria for filter providers */
+    enum {
+        HANDLER,
+        REQUEST_HEADERS,
+        RESPONSE_HEADERS,
+        SUBPROCESS_ENV,
+        CONTENT_TYPE
+    } dispatch ;
+    /** Match value for filter providers */
+    const char* value ;
+    /** Providers for this filter */
+    ap_filter_provider_t* providers ;
+    /** Trace level for this filter */
+    int debug ;
+    /** Protocol flags for this filter */
+    unsigned int proto_flags ;
+    /** Save Ranges header if this filter unsets it */
+    const char* range ;
 };
 
 /**
@@ -507,6 +532,19 @@
                                            const char *fmt,
                                            ...)
         __attribute__((format(printf,3,4)));                                    
+
+/** Filter changes contents (so invalidating checksums/etc) */
+#define AP_FILTER_PROTO_CHANGE 0x1
+/** Filter changes length of contents (so invalidating content-length/etc) */
+#define AP_FILTER_PROTO_CHANGE_LENGTH 0x2
+/** Filter requires complete input and can't work on byteranges */
+#define AP_FILTER_PROTO_NO_BYTERANGE 0x4
+/** Filter should not run in a proxy */
+#define AP_FILTER_PROTO_NO_PROXY 0x8
+/** Filter makes output non-cacheable */
+#define AP_FILTER_PROTO_NO_CACHE 0x10
+/** Filter is incompatible with "Cache-Control: no-transform" */
+#define AP_FILTER_PROTO_TRANSFORM 0x20
 
 #ifdef __cplusplus
 }