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Willy Tarreaubaaee002006-06-26 02:48:02 +02001/*
Willy Tarreau2dd0d472006-06-29 17:53:05 +02002 include/common/defaults.h
Willy Tarreaubaaee002006-06-26 02:48:02 +02003 Miscellaneous default values.
4
Willy Tarreau31971e52009-09-20 12:07:52 +02005 Copyright (C) 2000-2009 Willy Tarreau - w@1wt.eu
Willy Tarreau6b66f3e2008-12-14 17:31:54 +01006
Willy Tarreaubaaee002006-06-26 02:48:02 +02007 This library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation, version 2.1
10 exclusively.
11
12 This library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
16
17 You should have received a copy of the GNU Lesser General Public
18 License along with this library; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20*/
21
Willy Tarreau2dd0d472006-06-29 17:53:05 +020022#ifndef _COMMON_DEFAULTS_H
23#define _COMMON_DEFAULTS_H
Willy Tarreaubaaee002006-06-26 02:48:02 +020024
Willy Tarreaubaaee002006-06-26 02:48:02 +020025/*
26 * BUFSIZE defines the size of a read and write buffer. It is the maximum
27 * amount of bytes which can be stored by the proxy for each session. However,
28 * when reading HTTP headers, the proxy needs some spare space to add or rewrite
29 * headers if needed. The size of this spare is defined with MAXREWRITE. So it
30 * is not possible to process headers longer than BUFSIZE-MAXREWRITE bytes. By
31 * default, BUFSIZE=16384 bytes and MAXREWRITE=BUFSIZE/2, so the maximum length
32 * of headers accepted is 8192 bytes, which is in line with Apache's limits.
33 */
34#ifndef BUFSIZE
35#define BUFSIZE 16384
36#endif
37
38// reserved buffer space for header rewriting
39#ifndef MAXREWRITE
40#define MAXREWRITE (BUFSIZE / 2)
41#endif
42
43#define REQURI_LEN 1024
44#define CAPTURE_LEN 64
45
Krzysztof Piotr Oledzkie6bbd742007-11-01 00:33:12 +010046// maximum line size when parsing config
47#ifndef LINESIZE
48#define LINESIZE 2048
49#endif
50
Willy Tarreau5d01a632009-06-22 16:02:30 +020051// max # of configuration files
52#define MAX_CFG_FILES 10
53
Willy Tarreaubaaee002006-06-26 02:48:02 +020054// max # args on a configuration line
Krzysztof Piotr Oledzkie6bbd742007-11-01 00:33:12 +010055#define MAX_LINE_ARGS 64
Willy Tarreaubaaee002006-06-26 02:48:02 +020056
Willy Tarreau5ca791d2009-08-16 19:06:42 +020057// max # args on a stats socket
58#define MAX_STATS_ARGS 16
Krzysztof Piotr Oledzki2c6962c2008-03-02 02:42:14 +010059
Willy Tarreaubaaee002006-06-26 02:48:02 +020060// max # of added headers per request
61#define MAX_NEWHDR 10
62
63// max # of matches per regexp
64#define MAX_MATCH 10
65
Willy Tarreaue5f20dc2006-12-03 15:21:35 +010066// max # of headers in one HTTP request or response
67// By default, about 100 headers per 8 kB.
68#ifndef MAX_HTTP_HDR
69#define MAX_HTTP_HDR ((BUFSIZE+79)/80)
70#endif
71
Willy Tarreaub8949f12007-03-23 22:39:59 +010072// max # of loops we can perform around a read() which succeeds.
73// It's very frequent that the system returns a few TCP segments at a time.
74#ifndef MAX_READ_POLL_LOOPS
75#define MAX_READ_POLL_LOOPS 4
76#endif
77
Willy Tarreau6f4a82c2009-03-21 20:43:57 +010078// minimum number of bytes read at once above which we don't try to read
79// more, in order not to risk facing an EAGAIN. Most often, if we read
80// at least 10 kB, we can consider that the system has tried to read a
81// full buffer and got multiple segments (>1 MSS for jumbo frames, >7 MSS
82// for normal frames) did not bother truncating the last segment.
83#ifndef MIN_RECV_AT_ONCE_ENOUGH
84#define MIN_RECV_AT_ONCE_ENOUGH (7*1448)
85#endif
86
Willy Tarreau83749182007-04-15 20:56:27 +020087// same, but for writes. Generally, it's enough to write twice: one time for
88// first half of the buffer, and a second time for the last half after a
89// wrap-around.
90#ifndef MAX_WRITE_POLL_LOOPS
91#define MAX_WRITE_POLL_LOOPS 2
92#endif
93
Willy Tarreau9641e8f2007-03-23 23:02:09 +010094// the number of bytes returned by a read below which we will not try to
95// poll the socket again. Generally, return values below the MSS are worthless
96// to try again.
97#ifndef MIN_RET_FOR_READ_LOOP
98#define MIN_RET_FOR_READ_LOOP 1460
99#endif
100
Willy Tarreau1db37712007-06-03 17:16:49 +0200101// the max number of events returned in one call to poll/epoll. Too small a
102// value will cause lots of calls, and too high a value may cause high latency.
103#ifndef MAX_POLL_EVENTS
104#define MAX_POLL_EVENTS 200
105#endif
106
Willy Tarreaubaaee002006-06-26 02:48:02 +0200107// cookie delimitor in "prefix" mode. This character is inserted between the
108// persistence cookie and the original value. The '~' is allowed by RFC2965,
109// and should not be too common in server names.
110#ifndef COOKIE_DELIM
111#define COOKIE_DELIM '~'
112#endif
113
114#define CONN_RETRIES 3
115
116#define CHK_CONNTIME 2000
117#define DEF_CHKINTR 2000
118#define DEF_FALLTIME 3
119#define DEF_RISETIME 2
120#define DEF_CHECK_REQ "OPTIONS / HTTP/1.0\r\n\r\n"
Willy Tarreau23677902007-05-08 23:50:35 +0200121#define DEF_SMTP_CHECK_REQ "HELO localhost\r\n"
Willy Tarreaubaaee002006-06-26 02:48:02 +0200122
Ross Westaf72a1d2008-08-03 10:51:45 +0200123// X-Forwarded-For header default
124#define DEF_XFORWARDFOR_HDR "X-Forwarded-For"
125
Maik Broemme2850cb42009-04-17 18:53:21 +0200126// X-Original-To header default
127#define DEF_XORIGINALTO_HDR "X-Original-To"
128
Willy Tarreaubaaee002006-06-26 02:48:02 +0200129/* Default connections limit.
130 *
131 * A system limit can be enforced at build time in order to avoid using haproxy
132 * beyond reasonable system limits. For this, just define SYSTEM_MAXCONN to the
133 * absolute limit accepted by the system. If the configuration specifies a
134 * higher value, it will be capped to SYSTEM_MAXCONN and a warning will be
135 * emitted. The only way to override this limit will be to set it via the
136 * command-line '-n' argument.
137 */
138#ifndef SYSTEM_MAXCONN
Willy Tarreauc9fe4562009-06-15 16:33:36 +0200139#ifndef DEFAULT_MAXCONN
Willy Tarreaubaaee002006-06-26 02:48:02 +0200140#define DEFAULT_MAXCONN 2000
Willy Tarreauc9fe4562009-06-15 16:33:36 +0200141#endif
Willy Tarreaubaaee002006-06-26 02:48:02 +0200142#else
Willy Tarreauc9fe4562009-06-15 16:33:36 +0200143#undef DEFAULT_MAXCONN
Willy Tarreaubaaee002006-06-26 02:48:02 +0200144#define DEFAULT_MAXCONN SYSTEM_MAXCONN
145#endif
146
Willy Tarreau2c43a1e2007-10-14 23:05:39 +0200147/* Minimum check interval for spread health checks. Servers with intervals
148 * greater than or equal to this value will have their checks spread apart
149 * and will be considered when searching the minimal interval.
150 * Others will be ignored for the minimal interval and will have their checks
151 * scheduled on a different basis.
152 */
153#ifndef SRV_CHK_INTER_THRES
154#define SRV_CHK_INTER_THRES 1000
155#endif
156
Krzysztof Oledzkid9db9272007-10-15 10:05:11 +0200157/* Specifies the string used to report the version and release date on the
158 * statistics page. May be defined to the empty string ("") to permanently
159 * disable the feature.
160 */
161#ifndef STATS_VERSION_STRING
162#define STATS_VERSION_STRING " version " HAPROXY_VERSION ", released " HAPROXY_DATE
163#endif
164
Willy Tarreau8f38bd02009-05-10 08:53:33 +0200165/* Maximum signal queue size, and also number of different signals we can
166 * handle.
167 */
168#ifndef MAX_SIGNAL
169#define MAX_SIGNAL 256
170#endif
171
Willy Tarreau3ad6a762009-08-16 10:08:02 +0200172/* Maximum host name length */
173#ifndef MAX_HOSTNAME_LEN
174#define MAX_HOSTNAME_LEN 32
175#endif
176
Krzysztof Piotr Oledzkif7089f52009-10-10 21:06:49 +0200177/* Maximum health check description length */
178#ifndef HCHK_DESC_LEN
179#define HCHK_DESC_LEN 128
180#endif
181
Willy Tarreau2dd0d472006-06-29 17:53:05 +0200182#endif /* _COMMON_DEFAULTS_H */