diff --git a/include/proto/proto_http.h b/include/proto/proto_http.h
index d70603c..35a216c 100644
--- a/include/proto/proto_http.h
+++ b/include/proto/proto_http.h
@@ -62,6 +62,7 @@
 int process_srv_data(struct session *t);
 int process_srv_conn(struct session *t);
 int http_wait_for_request(struct session *s, struct buffer *req, int an_bit);
+int http_process_req_common(struct session *s, struct buffer *req, int an_bit, struct proxy *px);
 int http_process_request(struct session *t, struct buffer *req, int an_bit);
 int http_process_tarpit(struct session *s, struct buffer *req, int an_bit);
 int http_process_request_body(struct session *s, struct buffer *req, int an_bit);
diff --git a/include/proto/proxy.h b/include/proto/proxy.h
index 8a2789d..36360e5 100644
--- a/include/proto/proxy.h
+++ b/include/proto/proxy.h
@@ -35,6 +35,7 @@
 void stop_proxy(struct proxy *p);
 void pause_proxies(void);
 void listen_proxies(void);
+void session_set_backend(struct session *s, struct proxy *be);
 
 const char *proxy_cap_str(int cap);
 const char *proxy_mode_str(int mode);
diff --git a/include/types/buffers.h b/include/types/buffers.h
index a895477..234020f 100644
--- a/include/types/buffers.h
+++ b/include/types/buffers.h
@@ -106,12 +106,16 @@
  * afterwards.
  */
 #define AN_REQ_INSPECT          0x00000001  /* inspect request contents */
-#define AN_REQ_HTTP_HDR         0x00000002  /* inspect HTTP request headers */
-#define AN_REQ_HTTP_BODY        0x00000004  /* inspect HTTP request body */
-#define AN_REQ_HTTP_TARPIT      0x00000008  /* wait for end of HTTP tarpit */
-#define AN_RTR_HTTP_HDR         0x00000010  /* inspect HTTP response headers */
-#define AN_REQ_UNIX_STATS       0x00000020  /* process unix stats socket request */
-#define AN_REQ_WAIT_HTTP        0x00000040  /* wait for an HTTP request */
+#define AN_REQ_WAIT_HTTP        0x00000002  /* wait for an HTTP request */
+#define AN_REQ_HTTP_PROCESS_FE  0x00000004  /* process the frontend's HTTP part */
+#define AN_REQ_SWITCHING_RULES  0x00000008  /* apply the switching rules */
+#define AN_REQ_HTTP_PROCESS_BE  0x00000010  /* process the backend's HTTP part */
+#define AN_REQ_HTTP_INNER       0x00000020  /* inner processing of HTTP request */
+#define AN_REQ_HTTP_TARPIT      0x00000040  /* wait for end of HTTP tarpit */
+#define AN_REQ_HTTP_BODY        0x00000080  /* inspect HTTP request body */
+#define AN_REQ_UNIX_STATS       0x00000100  /* process unix stats socket request */
+
+#define AN_RTR_HTTP_HDR         0x00000200  /* inspect HTTP response headers */
 
 /* describes a chunk of string */
 struct chunk {