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/*
* include/common/defaults.h
* Miscellaneous default values.
*
* Copyright (C) 2000-2010 Willy Tarreau - w@1wt.eu
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, version 2.1
* exclusively.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _COMMON_DEFAULTS_H
#define _COMMON_DEFAULTS_H
/*
* 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
#ifndef MAXREWRITE
#define MAXREWRITE (BUFSIZE / 2)
#endif
#define REQURI_LEN 1024
#define CAPTURE_LEN 64
// maximum line size when parsing config
#ifndef LINESIZE
#define LINESIZE 2048
#endif
// max # args on a configuration line
#define MAX_LINE_ARGS 64
// max # args on a stats socket
#define MAX_STATS_ARGS 16
// max # of matches per regexp
#define MAX_MATCH 10
// max # of headers in one HTTP request or response
// By default, about 100 headers per 8 kB.
#ifndef MAX_HTTP_HDR
#define MAX_HTTP_HDR ((BUFSIZE+79)/80)
#endif
// max # of headers in history when looking for header #-X
#ifndef MAX_HDR_HISTORY
#define MAX_HDR_HISTORY 10
#endif
// max # of loops we can perform around a read() which succeeds.
// It's very frequent that the system returns a few TCP segments at a time.
#ifndef MAX_READ_POLL_LOOPS
#define MAX_READ_POLL_LOOPS 4
#endif
// minimum number of bytes read at once above which we don't try to read
// more, in order not to risk facing an EAGAIN. Most often, if we read
// at least 10 kB, we can consider that the system has tried to read a
// full buffer and got multiple segments (>1 MSS for jumbo frames, >7 MSS
// for normal frames) did not bother truncating the last segment.
#ifndef MIN_RECV_AT_ONCE_ENOUGH
#define MIN_RECV_AT_ONCE_ENOUGH (7*1448)
#endif
// same, but for writes. Generally, it's enough to write twice: one time for
// first half of the buffer, and a second time for the last half after a
// wrap-around.
#ifndef MAX_WRITE_POLL_LOOPS
#define MAX_WRITE_POLL_LOOPS 2
#endif
// the number of bytes returned by a read below which we will not try to
// poll the socket again. Generally, return values below the MSS are worthless
// to try again.
#ifndef MIN_RET_FOR_READ_LOOP
#define MIN_RET_FOR_READ_LOOP 1460
#endif
// the max number of events returned in one call to poll/epoll. Too small a
// value will cause lots of calls, and too high a value may cause high latency.
#ifndef MAX_POLL_EVENTS
#define MAX_POLL_EVENTS 200
#endif
// cookie delimitor in "prefix" mode. This character is inserted between the
// persistence cookie and the original value. The '~' is allowed by RFC2965,
// and should not be too common in server names.
#ifndef COOKIE_DELIM
#define COOKIE_DELIM '~'
#endif
#define CONN_RETRIES 3
#define CHK_CONNTIME 2000
#define DEF_CHKINTR 2000
#define DEF_FALLTIME 3
#define DEF_RISETIME 2
#define DEF_CHECK_REQ "OPTIONS / HTTP/1.0\r\n"
#define DEF_SMTP_CHECK_REQ "HELO localhost\r\n"
#define DEF_HANA_ONERR HANA_ONERR_FAILCHK
#define DEF_HANA_ERRLIMIT 10
// X-Forwarded-For header default
#define DEF_XFORWARDFOR_HDR "X-Forwarded-For"
// X-Original-To header default
#define DEF_XORIGINALTO_HDR "X-Original-To"
/* Default connections limit.
*
* A system limit can be enforced at build time in order to avoid using haproxy
* beyond reasonable system limits. For this, just define SYSTEM_MAXCONN to the
* absolute limit accepted by the system. If the configuration specifies a
* higher value, it will be capped to SYSTEM_MAXCONN and a warning will be
* emitted. The only way to override this limit will be to set it via the
* command-line '-n' argument.
*/
#ifndef SYSTEM_MAXCONN
#ifndef DEFAULT_MAXCONN
#define DEFAULT_MAXCONN 2000
#endif
#else
#undef DEFAULT_MAXCONN
#define DEFAULT_MAXCONN SYSTEM_MAXCONN
#endif
/* Minimum check interval for spread health checks. Servers with intervals
* greater than or equal to this value will have their checks spread apart
* and will be considered when searching the minimal interval.
* Others will be ignored for the minimal interval and will have their checks
* scheduled on a different basis.
*/
#ifndef SRV_CHK_INTER_THRES
#define SRV_CHK_INTER_THRES 1000
#endif
/* Specifies the string used to report the version and release date on the
* statistics page. May be defined to the empty string ("") to permanently
* disable the feature.
*/
#ifndef STATS_VERSION_STRING
#define STATS_VERSION_STRING " version " HAPROXY_VERSION ", released " HAPROXY_DATE
#endif
/* Maximum signal queue size, and also number of different signals we can
* handle.
*/
#ifndef MAX_SIGNAL
#define MAX_SIGNAL 256
#endif
/* Maximum host name length */
#ifndef MAX_HOSTNAME_LEN
#define MAX_HOSTNAME_LEN 32
#endif
/* Maximum health check description length */
#ifndef HCHK_DESC_LEN
#define HCHK_DESC_LEN 128
#endif
#endif /* _COMMON_DEFAULTS_H */