ChangeLog : =========== 2006/01/29 : 1.1.34 - the "retries" option was ignored because connect() could not return an error if the connection failed before the timeout. - fixed a nasty bug affecting poll/epoll which could return unmodified data from the server to the client, and sometimes lead to memory corruption crashing the process. It did not affect select() code but had to be fixed anyway. - added the new pause/play mechanism with SIGTTOU/SIGTTIN for hot-reconf. 2005/10/25 : 1.1.33 - building with -DUSE_PCRE should include PCRE headers and not regex.h. At least on Solaris, this caused the libc's regex primitives to be used instead of PCRE, which caused trouble on group references. This is now fixed. - delayed the quiet mode during startup so that most of the startup alerts can be displayed even in quiet mode. - display an alert when a listener has no address, invalid or no port, or when there are no enabled listeners upon startup. 2005/10/09 : 1.1.33rc - socklen_t fixes from Alexander Lazic - second batch of socklen_t changes. - clean-ups from Cameron Simpson. - because tv_remain() does not know about eternity, using no timeout can make select() spin around a null time-out. Bug reported by Cameron Simpson. - client read timeout was not properly set to eternity initialized after an accept() if it was not set in the config. It remained undetected so long because eternity is 0 and newly allocated pages are zeroed by the system. - do not call get_original_dst() when not in transparent mode. 2005/07/06 : 1.1.32 - added the number of active sessions (proxy/process) in the logs 2005/07/06 : 1.1.32-pre5 - fixed build on PPC where chars are unsigned by default (from 1.2.5.2) 2005/07/05 : 1.1.32-pre4 - the time-out fix introduced in 1.1.25 caused a corner case where it was possible for a client to keep a connection maintained regardless of the timeout if the server closed the connection during the HEADER phase, while the client ignored the close request while doing nothing in the other direction. This has been fixed now by ensuring that read timeouts are re-armed when switching to any SHUTW state. 2005/07/05 : 1.1.32-pre3 - enhanced error reporting in the logs. Now the proxy will precisely detect various error conditions related to the system and/or process limits, and generate LOG_EMERG logs indicating that a resource has been exhausted. - logs will contain two new characters for the error cause : 'R' indicates a resource exhausted, and 'I' indicates an internal error, though this one should never happen. - server connection timeouts can now be reported in the logs (sC), as well as connections refused because of maxconn limitations (PC). 2005/07/05 : 1.1.32-pre2 - new global configuration keyword "ulimit-n" may be used to raise the FD limit to usable values. - a warning is now displayed on startup if the FD limit is lower than the configured maximum number of sockets. 2005/07/05 : 1.1.32-pre1 - new configuration keyword "monitor-net" makes it possible to be monitored by external devices which connect to the proxy without being logged nor forwarded to any server. Particularly useful on generic TCP relays. 2005/04/30 : 1.1.31 - changed default FD_SETSIZE to 65536 on Solaris (default=1024) 2005/04/24 : 1.1.31-pre2 - implemented the HTTP 303 code for error redirection. This forces the browser to fetch the given URI with a GET request. The new keyword for this is 'errorloc303', and a new 'errorloc302' keyword has been created to make them easily distinguishable. - added more controls in the parser for valid use of '\x' sequence. 2005/02/17 : 1.1.31-pre1 - fixed a few errors in the documentation 2005/02/13 - do not pre-initialize unused file-descriptors before select() anymore. 2005/01/22 : 1.1.30 - add an architecture guide to the documentation - released without any changes 2004/11/27 : 1.1.30-pre1 - increased default BUFSIZE to 16 kB to accept max headers of 8 kB which is compatible with Apache. This limit can be configured in the makefile now. Thanks to Eric Fehr for the checks. - added a per-server "source" option which now makes it possible to bind to a different source for each (potentially identical) server. - changed cookie-based server selection slightly to allow several servers to share a same cookie, thus making it possible to associate backup servers to live servers and ease soft-stop for maintenance periods. (Alexander Lazic) - added the cookie 'prefix' mode which makes it possible to use persistence with thin clients which support only one cookie. The server name is prefixed before the application cookie, and restored back. - fixed the order of servers within an instance to match documentation. Now the servers are *really* used in the order of their declaration. This is particularly important when multiple backup servers are in use. 2004/10/17 : 1.1.29 - fixed a bug where a TCP connection would be logged twice if the 'logasap' option was enabled without the 'tcplog' option. - encode_string() would use hdr_encode_map instead of the map argument. 2004/08/10 : 1.1.29-pre2 - the logged request is now encoded with '#XX' for unprintable characters - new keywords 'capture request header' and 'capture response header' enable logging of arbitrary HTTP headers in requests and responses - removed "-DSOLARIS" after replacing the last inet_aton() with inet_pton() 2004/06/06 : 1.1.28 - added the '-V' command line option to verbosely report errors even though the -q or 'quiet' options are specified. This is useful with '-c'. - added a Red Hat init script and a .spec from Simon Matter 2004/06/05 : - added the "logasap" option which produces a log without waiting for the data to be transferred from the server to the client. - added the "httpclose" option which removes any "connection:" header and adds "Connection: close" in both direction. - added the 'checkcache' option which blocks cacheable responses containing dangerous headers, such as 'set-cookie'. - added 'rspdeny' and 'rspideny' to block certain responses to avoid sensible information leak from servers. 2004/04/18 : - send an EMERG log when no server is available for a given proxy - added the '-c' command line option to syntactically check the configuration file without starting the service. 2003/10/27 : 1.1.27 - the configurable HTTP health check introduced in 1.1.23 revealed a shameful bug : the code still assumed that HTTP requests were the same size as the original ones (22 bytes), and failed if they were not. - added support for pidfiles. 2003/10/22 : 1.1.26 - the fix introduced in 1.1.25 for client timeouts while waiting for servers broke almost all compatibility with POST requests, because the proxy stopped to read anything from the client as soon as it got all of its headers. 2003/10/15 : 1.1.25 - added the 'tcplog' option, which provides enhanced, HTTP-like logs for generic TCP proxies, or lighter logs for HTTP proxies. - fixed a time-out condition wrongly reported as client time-out in data phase if the client timeout was lower than the connect timeout times the number of retries. 2003/09/21 : 1.1.24 - if a client sent a full request then shut its write connection down, then the request was aborted. This case was detected only when using haproxy both as health-check client and as a server. - if 'option httpchk' is used in a 'health' mode server, then responses will change from 'OK' to 'HTTP/1.0 200 OK'. - fixed a Linux-only bug in case of HTTP server health-checks, where a single server response followed by a close could be ignored, and the server seen as failed. 2003/09/19 : 1.1.23 - fixed a stupid bug introduced in 1.1.22 which caused second and subsequent 'default' sections to keep previous parameters, and not initialize logs correctly. - fixed a second stupid bug introduced in 1.1.22 which caused configurations relying on 'dispatch' mode to segfault at the first connection. - 'option httpchk' now supports method, HTTP version and a few headers. - now, 'option httpchk', 'cookie' and 'capture' can be specified in 'defaults' section 2003/09/10 : 1.1.22 - 'listen' now supports optionnal address:port-range lists - 'bind' introduced to add new listen addresses - fixed a bug which caused a session to be kept established on a server till it timed out if the client closed during the DATA phase. - the port part of each server address can now be empty to make the proxy connect to the server on the same port it was connected to, be an absolute unsigned number to reflect a single port (as in older versions), or an explicitly signed number (+N/-N) to indicate that this offset must be applied to the port the proxy was connected to, when connecting to the server. - the 'port' server option allows the user to specify a different health-check port than the service one. It is mandatory when only relative ports have been specified and check is required. By default, the checks are sent to the service port. - new 'defaults' section which is rather similar to 'listen' except that all values are only used as default values for future 'listen' sections, until a new 'defaults' resets them. At the moment, server options, regexes, cookie names and captures cannot be set in the 'defaults' section. 2003/05/06 : 1.1.21 - changed the debug output format so that it now includes the session unique ID followed by the instance name at the beginning of each line. - in debug mode, accept now shows the client's IP and port. - added one 3 small debugging scripts to search and pretty print debug output - changed the default health check request to "OPTIONS /" instead of "OPTIONS *" since not all servers implement the later one. - "option httpchk" now accepts an optional parameter allowing the user to specify and URI other than '/' during health-checks. 2003/04/21 : 1.1.20 - fixed two problems with time-outs, one where a server would be logged as timed out during transfer that take longer to complete than the fixed time-out, and one where clients were logged as timed-out during the data phase because they didn't have anything to send. This sometimes caused slow client connections to close too early while in fact there was no problem. The proper fix would be to have a per-fd time-out with conditions depending on the state of the HTTP FSM. 2003/04/16 : 1.1.19 - haproxy was NOT RFC compliant because it was case-sensitive on HTTP "Cookie:" and "Set-Cookie:" headers. This caused JVM 1.4 to fail on cookie persistence because it uses "cookie:". Two memcmp() have been replaced with strncasecmp(). 2003/04/02 : 1.1.18 - Haproxy can be compiled with PCRE regex instead of libc regex, by setting REGEX=pcre on the make command line. - HTTP health-checks now use "OPTIONS *" instead of "OPTIONS /". - when explicit source address binding is required, it is now also used for health-checks. - added 'reqpass' and 'reqipass' to allow certain headers but not the request itself. - factored several strings to reduce binary size by about 2 kB. - replaced setreuid() and setregid() with more standard setuid() and setgid(). - added 4 status flags to the log line indicating who ended the connection first, the sessions state, the validity of the cookie, and action taken on the set-cookie header. 2002/10/18 : 1.1.17 - add the notion of "backup" servers, which are used only when all other servers are down. - make Set-Cookie return "" instead of "(null)" when the server has no cookie assigned (useful for backup servers). - "log" now supports an optionnal level name (info, notice, err ...) above which nothing is sent. - replaced some strncmp() with memcmp() for better efficiency. - added "capture cookie" option which logs client and/or server cookies - cleaned up/down messages and dump servers states upon SIGHUP - added a redirection feature for errors : "errorloc " - now we won't insist on connecting to a dead server, even with a cookie, unless option "persist" is specified. - added HTTP/408 response for client request time-out and HTTP/50[234] for server reply time-out or errors. 2002/09/01 : 1.1.16 - implement HTTP health checks when option "httpchk" is specified. 2002/08/07 : 1.1.15 - replaced setpgid()/setpgrp() with setsid() for better portability, because setpgrp() doesn't have the same meaning under Solaris, Linux, and OpenBSD. 2002/07/20 : 1.1.14 - added "postonly" cookie mode 2002/07/15 : 1.1.13 - tv_diff used inverted parameters which led to negative times ! 2002/07/13 : 1.1.12 - fixed stats monitoring, and optimized some tv_* for most common cases. - replaced temporary 'newhdr' with 'trash' to reduce stack size - made HTTP errors more HTML-fiendly. - renamed strlcpy() to strlcpy2() because of a slightly difference between their behaviour (return value), to avoid confusion. - restricted HTTP messages to HTTP proxies only - added a 502 message when the connection has been refused by the server, to prevent clients from believing this is a zero-byte HTTP 0.9 reply. - changed 'Cache-control:' from 'no-cache="set-cookie"' to 'private' when inserting a cookie, because some caches (apache) don't understand it. - fixed processing of server headers when client is in SHUTR state 2002/07/04 : - automatically close fd's 0,1 and 2 when going daemon ; setpgrp() after setpgid() 2002/06/04 : 1.1.11 - fixed multi-cookie handling in client request to allow clean deletion in insert+indirect mode. Now, only the server cookie is deleted and not all the header. Should now be compliant to RFC2965. - added a "nocache" option to "cookie" to specify that we explicitly want to add a "cache-control" header when we add a cookie. It is also possible to add an "Expires: " to keep compatibility with old/broken caches. 2002/05/10 : 1.1.10 - if a cookie is used in insert+indirect mode, it's desirable that the the servers don't see it. It was not possible to remove it correctly with regexps, so now it's removed automatically. 2002/04/19 : 1.1.9 - don't use snprintf()'s return value as an end of message since it may be larger. This caused bus errors and segfaults in internal libc's getenv() during localtime() in send_log(). - removed dead insecure send_syslog() function and all references to it. - fixed warnings on Solaris due to buggy implementation of isXXXX(). 2002/04/18 : 1.1.8 - option "dontlognull" - fixed "double space" bug in config parser - fixed an uninitialized server field in case of dispatch with no existing server which could cause a segfault during logging. - the pid logged was always the father's, which was wrong for daemons. - fixed wrong level "LOG_INFO" for message "proxy started". 2002/04/13 : - http logging is now complete : - ip:port, date, proxy, server - req_time, conn_time, hdr_time, tot_time - status, size, request - source address 2002/04/12 : 1.1.7 - added option forwardfor - added reqirep, reqidel, reqiallow, reqideny, rspirep, rspidel - added "log global" in "listen" section. 2002/04/09 : - added a new "global" section : - logs - debug, quiet, daemon modes - uid, gid, chroot, nbproc, maxconn 2002/04/08 : 1.1.6 - regex are now chained and not limited anymore. - unavailable server now returns HTTP/502. - increased per-line args limit to 40 - added reqallow/reqdeny to block some request on matches - added HTTP 400/403 responses 2002/04/03 : 1.1.5 - connection logging displayed incorrect source address. - added proxy start/stop and server up/down log events. - replaced log message short buffers with larger trash. - enlarged buffer to 8 kB and replace buffer to 4 kB. 2002/03/25 : 1.1.4 - made rise/fall/interval time configurable 2002/03/22 : 1.1.3 - fixed a bug : cr_expire and cw_expire were inverted in CL_STSHUT[WR] which could lead to loops. 2002/03/21 : 1.1.2 - fixed a bug in buffer management where we could have a loop between event_read() and process_{cli|srv} if R==BUFSIZE-MAXREWRITE. => implemented an adjustable buffer limit. - fixed a bug : expiration of tasks in wait queue timeout is used again, and running tasks are skipped. - added some debug lines for accept events. - send warnings for servers up/down. 2002/03/12 : 1.1.1 - fixed a bug in total failure handling - fixed a bug in timestamp comparison within same second (tv_cmp_ms) 2002/03/10 : 1.1.0 - fixed a few timeout bugs - rearranged the task scheduler subsystem to improve performance, add new tasks, and make it easier to later port to librt ; - allow multiple accept() for one select() wake up ; - implemented internal load balancing with basic health-check ; - cookie insertion and header add/replace/delete, with better strings support. 2002/03/08 - reworked buffer handling to fix a few rewrite bugs, and improve overall performance. - implement the "purge" option to delete server cookies in direct mode. 2002/03/07 - fixed some error cases where the maxfd was not decreased. 2002/02/26 - now supports transparent proxying, at least on linux 2.4. 2002/02/12 - soft stop works again (fixed select timeout computation). - it seems that TCP proxies sometimes cannot timeout. - added a "quiet" mode. - enforce file descriptor limitation on socket() and accept(). 2001/12/30 : release of version 1.0.2 : fixed a bug in header processing 2001/12/19 : release of version 1.0.1 : no MSG_NOSIGNAL on solaris 2001/12/16 : release of version 1.0.0. 2001/12/16 : added syslog capability for each accepted connection. 2001/11/19 : corrected premature end of files and occasional SIGPIPE. 2001/10/31 : added health-check type servers (mode health) which replies OK then closes. 2001/10/30 : added the ability to support standard TCP proxies and HTTP proxies with or without cookies (use keyword http for this). 2001/09/01 : added client/server header replacing with regexps. eg: cliexp ^(Host:\ [^:]*).* Host:\ \1:80 srvexp ^Server:\ .* Server:\ Apache 2000/11/29 : first fully working release with complete FSMs and timeouts. 2000/11/28 : major rewrite 2000/11/26 : first write