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030407 Bugs uncovered by Charlie Reitsma <reitsmac@denison.edu>:
HOWTO incorrectly specified penctl in place of penlog
in Apache configuration example, and using penctl to
redirect log to penlogd didn't work.
Avoid bogus header rewriting in rewrite_request.
Released 0.10.1.
030210 New penctl commands "http" and "no http" to toggle -H.
030208 New option -H adds X-Forwarded-For header to http requests.
020717 Patches from Patroklos G. Argyroudis <argp@ieee.org>:
- check getopt() calls against -1 and not EOF
- fix for a possible format string in pen.c
020711 Ported to Darwin/MacOS X.
Released 0.9.4.
020705 New penctl command: recent [seconds] displays clients that have
connected recently (default five minutes), along with number of
connects, transmitted and received data.
020702 Buffer overflow in netlog. See comment in pen.c.
Added options -j (for chroot) and -u (for setuid) to pen and
penlogd. See manpages.
020627 Fixed an error which could throw penlogd into an endless loop
if a udp packet was lost at the crucial moment.
020626 Pedantic checking of memory allocations and buffer sizes.
020618 Penlogd: added option -n to adjust the number of cached log
entries from Pen.
020614 Added options -d, -f, -l and -p to penlogd. They do the same
as in pen. Also added signal handlers for TERM and HUP; these
too do the same as in pen. Updated penlogd manpage.
Updated www section in HOWTO to use penlog rather than mergelogs.
020613 Added penlog.c to log over a network using Apaches reliable
piped logs. A companion log server, penlogd.c, consolidates
logs from Pen and from all web servers into a single file.
Added the necessary code to Pen log over the network.
020610 Wrote penctl.cgi, a web wrapper for penctl.
020609 Wrote a new version of the main loop, using poll() instead of
select(). Added configuration option --with-poll to enable.
Also turned redefinition of FD_SETSIZE into a configuration
option --with-fd_setsize=N.
Updated installation instructions in INSTALL.
020605 Added optional hard limit to the number of connections to each
server.
Timestamps in debug log entries.
Released 0.8.0.
020604 Added "server of last resort" (-e option) which is only used
when all other servers are unavailable. (Andreas Wrede)
020528 Several enhancements and bugfixes by Andreas Wrede:
In webstats: changed CLIENTS_MAX to clients_max and
CONNECTIONS_MAX to connections_max.
Show time in human-readable format rather than seconds since 1970.
Changed byte counters from unsigned long to unsigned long long.
Fixed file descriptor leak: The connection wasn't closed when
the connection table was full.
Moved stats generation and log restart out of the signal handlers
and into the main loop.
If a client went away before receiving all its data (large files),
the remaining portion would be sent to the next client occupying
the same slot.
Added pointers in connection structure to avoid having to memcpy
the buffers in flush_up/flush_down.
Released 0.7.0.
020507 Updated the penctl manpage to reflect reality.
Released 0.6.3.
020417 Added -D switch to make copy_up and copy_down *always* store data
in a temporary buffer and wait for the next round through the
main loop before passing it on to the receiving end.
The penctl command for this is "delayed_forward".
When making sockets nonblocking (through fcntl(..., O_NONBLOCK)),
make sure that any existing flags are not reset in the process.
Important bugfix: each failed connection attempt in try_server
would result in one socket leaked because we returned without
closing it.
020413 Figured out why nonblocking mode was slower than blocking. Fixed.
020411 Added penctl, a simple user interface to the control protocol.
020324 Cancel timeout if it isn't needed.
020115 Added LDAP info in the HOWTO.
Added the flush_up/flush_down bugfix from 0.5.0 again.
Released 0.6.1.
020111 Moved #include <sys/types.h> before #include <netinet/in.h>
Replaced the call to setpgrp with setsid.
Transformed mergelogs into ultimately portable ANSI C (almost).
Thanks to Mike Dugas <mad@phobia.net> for help with porting
Removed the -r (rejects) option, since we no longer reject anything.
to FreeBSD 4.4-RELEASE.
020110 Rewrote mergelogs completely. It will now never discard a web
server log entry, and it tries much harder to locate a good
match in the pen log. It deals with log entries that are out
of order and servers with unsynchronized clocks and/or
different time zones. The -l (lag) option is no more.
Released 0.6.0
010915 Made the use of daemon() optional.
Added the cgi script penstats to update and display statistics.
Set current in store_conn.
Released 0.5.0.
010914 Statistics in HTML format (Riccard kerman).
Tested pen on HP-UX 10.20.
010913 Released 0.4.0.
010912 When storing part of the buffer for a renewed attempt,
store the *end*, not the beginning. Affects copy_up and copy_down.
Autoconf. Use daemon() if available. Make sure that we don't try
to close uninitialized file handles in add_client.
New option -n to not make sockets nonblocking (mainly useful
for debugging).
010911 Make sure that remaining data is stored away when we get EAGAIN
in copy_up.
Released 0.3.3.
010909 Added -p argument to store process id in a file (Andreas Wrede).
Made the sockets nonblocking. Handle EAGAIN in copy_up/down.
Released 0.3.2.
010908 Ignore SIGPIPE. Released 0.3.1.
010827 Option -h uses a hash on the client IP address for the initial
server selection. Option -s ("stubborn") prevents failover to
another server if the initial choice is unavailable.
010824 Use getport for the local port as well.
010820 Append to the logfile rather than overwriting it.
Released 0.2.0.
010817 Server selection algorithm rewritten in a cleaner, simpler way.
Blacklist nonresponding servers for a selectable period of time.
Optional "plain" roundrobin without client tracking.
(options -b and -r, see manpage).
Log to syslog if we are running in the background.
010814 Installed pen on siag.nu, which now load-balances itself. Apache
runs on port 8080, pen on 80. Seems to work (tm).
010813 Added description of options to pen.1 and mergelogs.1.
Script to guess libraries.
010812 Fixed typo (webmerge -> mergelogs) in pen.1.
010809 Added mergelogs, a program to match pen logs against web server
logs and merge the results into one log file with the correct
client addresses.
Released 0.1.0.
010808 Print statistics on stderr when sent USR1 signal.
Ported to Solaris, i.e. verified that it works ;-).
Logging. Reopen log file when sent HUP signal.
Exit cleanly when sent TERM signal.
010807 Wrote a manpage.
010803 Completed the conversion to non-forking, selecting mode. Works
really well now, with very low CPU utilization even with many
simultaneous connections.
010729 Rewrote the program to not fork.
010722 Prettied up the source.
001218 Updated the README.
001022 Rewrote the load balancing algorithm.
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