[MINOR] add X-Original-To: header
I have attached a patch which will add on every http request a new
header 'X-Original-To'. If you have HAProxy running in transparent mode
with a big number of SQUID servers behind it, it is very nice to have
the original destination ip as a common header to make decisions based
on it.
The whole thing is configurable with a new option 'originalto'. I have
updated the sourcecode as well as the documentation. The 'haproxy-en.txt'
and 'haproxy-fr.txt' files are untouched, due to lack of my french
language knowledge. ;)
Also the patch adds this header for IPv4 only. I haven't any IPv6 test
environment running here and don't know if getsockopt() with SO_ORIGINAL_DST
will work on IPv6. If someone knows it and wants to test it I can modify
the diff. Feel free to ask me questions or things which should be changed. :)
--Maik
diff --git a/include/types/proxy.h b/include/types/proxy.h
index 71a5230..924019c 100644
--- a/include/types/proxy.h
+++ b/include/types/proxy.h
@@ -105,7 +105,8 @@
#define PR_O_CONTSTATS 0x10000000 /* continous counters */
#define PR_O_HTTP_PROXY 0x20000000 /* Enable session to use HTTP proxy operations */
#define PR_O_DISABLE404 0x40000000 /* Disable a server on a 404 response to a health-check */
-/* unused: 0x80000000 */
+#define PR_O_ORGTO 0x80000000 /* insert x-original-to with destination address */
+/* unused: 0x80000000 - now used by PR_O_ORGTO */
/* bits for proxy->options2 */
#define PR_O2_SPLIC_REQ 0x00000001 /* transfer requests using linux kernel's splice() */
@@ -231,8 +232,12 @@
unsigned int fe_maxsps; /* max # of new sessions per second on the frontend */
unsigned int fullconn; /* #conns on backend above which servers are used at full load */
struct in_addr except_net, except_mask; /* don't x-forward-for for this address. FIXME: should support IPv6 */
+ struct in_addr except_to; /* don't x-original-to for this address. */
+ struct in_addr except_mask_to; /* the netmask for except_to. */
char *fwdfor_hdr_name; /* header to use - default: "x-forwarded-for" */
int fwdfor_hdr_len; /* length of "x-forwarded-for" header */
+ char *orgto_hdr_name; /* header to use - default: "x-original-to" */
+ int orgto_hdr_len; /* length of "x-original-to" header */
unsigned down_trans; /* up-down transitions */
unsigned down_time; /* total time the proxy was down */