--- ./haproxy.c~	Sun Nov 14 16:13:34 2004
+++ ./haproxy.c	Sat Nov 27 13:35:50 2004
@@ -73,10 +73,24 @@
 #define SHUT_WR		1
 #endif
 
-#define BUFSIZE		8192
+/*
+ * BUFSIZE defines the size of a read and write buffer. It is the maximum
+ * amount of bytes which can be stored by the proxy for each session. However,
+ * when reading HTTP headers, the proxy needs some spare space to add or rewrite
+ * headers if needed. The size of this spare is defined with MAXREWRITE. So it
+ * is not possible to process headers longer than BUFSIZE-MAXREWRITE bytes. By
+ * default, BUFSIZE=16384 bytes and MAXREWRITE=BUFSIZE/2, so the maximum length
+ * of headers accepted is 8192 bytes, which is in line with Apache's limits.
+ */
+#ifndef BUFSIZE
+#define BUFSIZE		16384
+#endif
 
 // reserved buffer space for header rewriting
-#define	MAXREWRITE	4096
+#ifndef MAXREWRITE
+#define MAXREWRITE	(BUFSIZE / 2)
+#endif
+
 #define REQURI_LEN	1024
 #define CAPTURE_LEN	64
 
--- ./Makefile~	Sat Aug 14 15:55:31 2004
+++ ./Makefile	Sat Nov 27 12:07:09 2004
@@ -61,12 +61,19 @@
 #DEBUG =
 DEBUG = -g
 
+# if small memory footprint is required, you can reduce the buffer size. There
+# are 2 buffers per concurrent session, so 16 kB buffers will eat 32 MB memory
+# with 1000 concurrent sessions.
+#SMALL_OPTS = -DBUFSIZE=8192 -DMAXREWRITE=1024
+SMALL_OPTS =
+
+
 # global options
 TARGET_OPTS=$(COPTS.$(TARGET))
 REGEX_OPTS=$(COPTS.$(REGEX))
 CPU_OPTS=$(COPTS.$(CPU))
 
-COPTS=$(CPU_OPTS) $(TARGET_OPTS) $(REGEX_OPTS)
+COPTS=$(CPU_OPTS) $(TARGET_OPTS) $(REGEX_OPTS) $(SMALL_OPTS)
 LIBS=$(LIBS.$(TARGET)) $(LIBS.$(REGEX))
 
 # - use -DSTATTIME=0 to disable statistics, else specify an interval in