text: /*
   * 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
  
  // this delimitor is used between a server's name and a last visit date in
  // cookies exchanged with the client.
  #ifndef COOKIE_DELIM_DATE
  #define COOKIE_DELIM_DATE       '|'
  #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_LDAP_CHECK_REQ   "\x30\x0c\x02\x01\x01\x60\x07\x02\x01\x03\x04\x00\x80\x00"
  
  #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 */
  