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If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee. END OF TERMS AND CONDITIONS fair-0.5.3/ChangeLog0000664167275116727510000002233111666655052011212 000000000000002011-12-02 11:36 wsl * COPYING: add COPYING 2011-12-02 10:53 wsl * LICENSE, src/address.c, src/address.h, src/avlr.c, src/avlr.h, src/carrousel.c, src/chrono.c, src/chrono.h, src/conf.c, src/conf.h, src/conn.c, src/conn.h, src/error.c, src/error.h, src/fair.h, src/fd.c, src/fd.h, src/fdcopy.c, src/fdcopy.h, src/init.c, src/init.h, src/options.h, src/protocol.h, src/relay.c, src/relay.h, src/sock.c, src/sock.h, src/transponder.c, src/worker.c, src/worker.h: fix license notices, upgrade to GPL3 2011-12-02 10:43 wsl * makedist: redirect svn2cl output properly 2011-12-02 09:28 wsl * AUTHORS, LICENSE, NEWS, THANKS, configure.ac, makedist, src/relay.c: release 0.5.2 2011-12-02 09:06 wsl * ., Makefile.am, autogen.sh, bootstrap, makedist: merge packaging changes from trunk 2011-12-02 08:56 wsl * AUTHORS, src/relay.c: eof on send stream caused termination of receive stream, which is wrong. Fix by Frank Doepper 2011-12-02 08:54 wsl * ., ChangeLog, README, configure.ac: merge packaging changes from trunk 2011-12-02 08:47 wsl * .: 0.5.1 is a tag, 0.5 is a branch 2008-09-03 09:37 wsl * reorganize subversion tree 2007-12-21 15:39 wsl * woeps 2007-12-21 15:36 wsl * met zonder debian/ dir 2005-08-04 08:03 wsl * ik moet eens engels leren 2005-08-03 14:38 wsl * welease woger! 2005-08-03 13:28 wsl * dezelfde wijziging kon met minder aanpassingen 2005-07-31 10:02 wsl * oesp, foutje 2005-07-31 09:38 wsl * alleen de timer en addr bewaren bij het berekenen van trailtime 2005-07-24 01:07 wsl * extra sanity checks 2005-07-22 09:14 wsl * 2005-07-15 14:07 wsl * compile fix en nieuwe default TrailTime 2005-07-15 13:58 wsl * meer gepruts 2005-07-15 09:42 wsl * it compiles!~ 2005-07-15 09:33 wsl * meebouwen 2005-07-15 09:26 wsl * nog geen release 2005-07-15 09:13 wsl * refactor 2005-07-12 13:26 joostvb * 2005-07-07 13:06 guus * svn:keywords property automatisch laten fixen. 2005-07-01 14:29 wsl * 2005-06-29 09:47 wsl * De Bug Die Geen Bug Was 2005-06-28 21:38 wsl * laatste bug fixed: release 2005-06-28 21:10 wsl * trailtime: een verbinding niet meteen vergeten nadat-ie klaar is 2005-06-28 19:14 wsl * nog geen release 2005-06-28 19:12 wsl * tricky boomzoekbug 2005-06-28 15:29 wsl * gedane zaken 2005-06-28 14:28 wsl * releasuh! 2005-06-28 13:25 wsl * compileert nu (en debug-segv fixed) 2005-06-28 11:09 wsl * niet op zinloze attributen vergelijken, gewoon round-robin doen 2005-06-28 09:41 wsl * it compiles 2005-06-28 07:59 wsl * naam gewijzigd 2005-06-28 07:59 wsl * heh, toch niet zo'n goed idee om de naam hetzelfde te houden 2005-06-28 07:54 wsl * nog geen release: half af 2005-06-28 07:51 wsl * geen release nog: half af 2005-06-28 07:41 wsl * wat extra avl-functie gebackport van libavl 2.0 2005-06-28 07:40 wsl * wat extra avl-functie gebackport van libavl 2.0 2005-06-21 07:35 wsl * grrrr, dit moest helemaal niet 2005-06-21 07:34 wsl * juiste functie checken 2005-06-20 19:48 wsl * non-blockinggebeuren verplaatst (backport van webcam) 2005-06-14 15:30 wsl * als dit anders moet hoor ik het graag 2005-06-14 09:17 wsl * grrr, fuck it 2005-06-14 09:15 wsl * release 0.3.1 2005-06-13 15:30 wsl * 2005-06-10 08:51 wsl * kansloos 2005-06-10 08:22 wsl * released 0.2.0 2005-06-05 21:12 wsl * kleine kansloosheidjes 2005-06-05 20:14 wsl * hier ook meer info 2005-06-02 18:53 wsl * extra checkjess 2005-06-02 18:48 wsl * - introduceer identifiers om berichten over verbindingen te kunnen correleren - fix bug met conf_reload() 2005-06-02 18:32 wsl * stringrepresentatie van adressen cachen 2005-06-02 12:40 wsl * kansloos 2005-06-02 12:36 wsl * release 0.2.0 - LocalTCP optie 2005-06-02 12:01 wsl * om bij conf_LocalTCP te kunnen 2005-06-02 11:59 wsl * misplaatste puntkomma's kwijt 2005-06-02 11:57 wsl * andere naam, met dank aan guus 2005-06-02 11:43 wsl * Passive optie - indien no, accepteer alleen verbindingen via loopback interface 2005-06-02 09:13 wsl * 0.1.1 release 2005-06-01 10:45 wsl * meh, wel initialiseren dan 2005-06-01 09:50 wsl * niet voor algemene consumptie 2005-06-01 09:01 wsl * bug waarbij verbinding hangt 2005-05-31 21:22 wsl * minder harige (maar wel erg lange) cmp-functies 2005-05-31 17:02 wsl * kleine bugjes uit manpages gehaald; carrousel.8 naar mdoc geconverteerd 2005-05-31 15:52 wsl * typos 2005-05-31 15:29 wsl * geen UvT-specifieke meuck in debian package! 2005-05-27 08:44 joostvb * fair has a homepage 2005-05-27 08:24 wsl * puntjes op de ı 2005-05-27 08:03 wsl * release early, release often 2005-05-27 07:44 wsl * bug: Hysteresis werd nooit gezet 2005-05-26 11:16 guus * Klagen als configfile niet bestaat, opties niet als hostnames behandelen. 2005-05-25 13:33 wsl * kansloos 2005-05-25 13:24 wsl * meh 2005-05-25 12:13 wsl * plakkerige worker nodes 2005-05-24 15:48 wsl * it compiles 2005-05-24 09:11 wsl * opzetje tot hysterese voor hosts 2005-05-18 05:33 joostvb * fix typo 2005-05-17 19:07 joostvb * 2005-05-17 19:05 joostvb * actually install manpages 2005-05-17 18:59 joostvb * 2005-05-17 18:57 joostvb * 2005-05-17 18:56 joostvb * svn snapshot build to check Debian package 2005-05-17 18:52 joostvb * 2005-05-17 18:50 joostvb * based upon https://pong.uvt.nl/its-unix/group/mailworker/etc/default/fair 2005-05-17 18:46 joostvb * as found in https://pong.uvt.nl/its-unix/group/mailcluster/etc/init.d/fair 2005-05-17 11:15 wsl * was guus nog vergeten 2005-05-17 08:09 wsl * op verzoek 2005-05-17 07:44 wsl * in overleg 2005-05-12 15:16 guus * zo dus 2005-05-12 15:15 guus * hysterese in keuze van backend nodes 2005-05-12 14:28 guus * sta gebruik van andere configuratiebestanden toe 2005-05-03 13:55 wsl * grr 2005-05-03 13:00 wsl * release 0.0.3 2005-05-03 12:47 wsl * release 0.0.3 2005-05-03 12:47 wsl * release 0.0.3 2005-05-03 09:25 wsl * details 2005-04-25 12:58 wsl * kudos 2005-04-25 12:53 wsl * goed punt 2005-04-25 12:46 wsl * docs graag, guus. docs. 2005-04-25 12:41 wsl * dat hoort door configure.ac geregeld te worden 2005-04-25 12:39 wsl * history bewaren terwijl we svn gebruiken? 2005-04-25 12:34 guus * warnings terug 2005-04-25 12:21 wsl * addr werd ongeïnitialiseerd gebruikt in outgoing_tcp(), bug gevonden door guus (bedankt!) 2005-04-25 12:19 wsl * addr werd ongeïnitialiseerd gebruikt in outgoing_tcp(), bug gevonden door guus (bedankt!) 2005-04-25 11:41 guus * zinloze en platformafhankelijke herimplementatie van getloadavg() verwijderd 2005-04-25 11:31 guus * AC_DEFINE_DIR is geen standaard autoconf macro 2005-04-25 11:30 guus * fair docs 2005-04-25 06:57 wsl * moet eerste regel zijn 2005-04-17 16:20 joostvb * deal with stuff in doc/fair/ 2005-04-17 16:01 joostvb * this kinda builds a .deb. not yet lintian-clean though 2005-04-17 15:20 joostvb * infrastructure for binary packaging stuff (rpm, deb, ...) 2005-04-05 09:09 wsl * store both from and to address and report it where useful 2005-03-24 15:01 wsl * beginnetje 2005-03-17 11:45 wsl * default voor SMTP 2005-03-17 11:40 wsl * er is iets mis met long doubles 2005-03-11 14:36 wsl * beetje uitgevleesd 2005-03-11 14:28 joostvb * begin van fair(7) manpage, extractie van email discussie 2005-03-10 17:48 wsl * make configfile ./configurable 2005-03-10 17:03 joostvb * doe maar in 1x met 3 args 2005-03-10 17:01 joostvb * geloof dat we niet moeten quoten hier 2005-03-10 16:50 wsl * poging tot AC_DEFINE_DIR 2005-03-10 13:22 wsl * 2005-01-27 16:35 joostvb * oops 2005-01-27 14:31 wsl * 2005-01-27 13:51 joostvb * 2005-01-27 13:50 joostvb * no libavl is fatal 2005-01-27 13:44 joostvb * cosmetics 2005-01-27 13:39 joostvb * 2005-01-27 13:35 joostvb * 2005-01-27 13:33 joostvb * nee, die moet je inderdaad niet toevoegen 2005-01-27 13:32 joostvb * these fixes have been made 2005-01-27 13:31 joostvb * meh 2005-01-27 13:26 wsl * hoppa 2005-01-27 13:16 wsl * bug 2005-01-27 13:13 wsl * eh... is dit goed? gegenereerde bestanden toevoegen? 2005-01-27 13:11 wsl * puntjes op de ı 2005-01-27 13:10 joostvb * 2005-01-27 13:08 wsl * 2005-01-27 13:07 wsl * was eerst broken, nu anders broken 2005-01-27 12:41 joostvb * shut up automake 2005-01-27 12:35 joostvb * autogenerated 2005-01-27 12:35 joostvb * spiekbriefje 2005-01-27 12:32 wsl * beginnetje van manpage 2005-01-27 12:21 joostvb * initial checkin of draft for manpage 2004-12-20 14:28 joostvb * eens kijken wat deze pending commit allemaal breekt 2004-12-08 14:58 wsl * oesp, kansloos 2004-11-26 15:42 joostvb * 2004-11-26 15:32 joostvb * das geen src 2004-11-26 15:15 joostvb * zo werkt ie een beetje 2004-11-26 15:08 joostvb * fix typo 2004-11-26 15:01 wsl * 2004-11-26 15:01 wsl * 2004-11-26 14:57 wsl * spul gekopiëerd en aangepast van systraq 2004-11-26 14:48 wsl * structuur aanbrengen 2004-11-16 14:18 wsl * wat ranzige code om regels te splitten, en svn tagjes 2004-11-16 14:07 wsl * load balancer fair-0.5.3/INSTALL0000644167275116727510000003633211500011217010445 00000000000000Installation Instructions ************************* Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. 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Run `configure --help' for more details. fair-0.5.3/NEWS0000664167275116727510000000307611666655011010137 000000000000002011-12-04 fair 0.5.3 - fix changelog generation - update licensing 2011-12-02 fair 0.5.2 - fix connection shutdown bug (thanks to Frank Doepper) - update packaging 2007-12-21 fair 0.5.1 - fixed grammar bug in manpage - don't ship debian directory 2005-08-03 fair 0.5.0 - unfix tree search bug that wasn't - reorganize the source code - new default TrailPeriod (was 5s, now 60s) 2005-06-28 fair 0.4.1 - fix tree search bug - new feature: don't forget about closed connections immediately but pretend they lasted "TrailPeriod" seconds longer (new config variable). This should help with short connections that cause a lot of work on the remote end after delivery finished. 2005-06-28 fair 0.4.0 - implement round robin for quiet intervals - fix crash when using Debug = yes (and improved the output a little) 2005-06-14 fair 0.3.1 - compilation fix 2005-06-10 fair 0.3.0 - small logging improvements - fix config reload bug - more internal checks 2005-06-02 fair 0.2.0 - LocalTCP option for binding to loopback only (default!) 2005-06-01 fair 0.1.1 - with fixed variable initialization 2005-06-01 fair 0.1.0 - interim release (EXPERIMENTAL) - refactored scheduler - ringbuffer bugfix 2005-05-25 fair 0.0.6 - Hysteresis bug fix release 2005-05-25 fair 0.0.5 - Hysteresis option 2005-05-17 fair 0.0.4 - svn snapshot release fair 0.0.3 - documentation (thanks to Guus Sliepen) fair 0.0.2 - make logged messages more informational fair 0.0.1 - first non-public pre test snapshot release $Id: NEWS 226 2011-12-04 11:31:21Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/NEWS $ fair-0.5.3/THANKS0000664167275116727510000000031411666115050010335 00000000000000Joost van Baal for helping with autoconfiscation Guus Sliepen for helping with docs and various suggestions. Frank Doepper for an important bugfix fair-0.5.3/TODO0000664167275116727510000000176510270134362010122 00000000000000wsl: • access control op TCP – inmiddels een beetje: het is mogelijk om aan alleen lokale interfaces te binden • access control: (niet) toegestane adressen cachen – mochten we ooit met getnameinfo() gaan werken dan kunnen we hier zien of een adres al toegevoegd is. – op negatieve entries moet een TTL • commentaar toevoegen zodat werking duidelijker wordt – bovenaan elke .h file iets over de opzet – onderaan iets over functies, parameters en assumpties – ergens iets over alle velden van elk struct – ‘design goals’ docje • met meerdere poorten werken – niet meer source-poort van UDP updates misbruiken – toch getnameinfo() en netjes poorten editen – lijstjessyntax nodig in config – per destinationport een lijstje met adressen? • avl_node_*_cmp functies en macros • aparte timeouts voor read timeout (idle) en write timeout • sommige structjes inlinen? joostvb: • configure.ac: BUG-REPORT-ADDRESS • genereer versienummer uit svn-revisie fair-0.5.3/depcomp0000755167275116727510000004426711500011217010777 00000000000000#! /bin/sh # depcomp - compile a program generating dependencies as side-effects scriptversion=2009-04-28.21; # UTC # Copyright (C) 1999, 2000, 2003, 2004, 2005, 2006, 2007, 2009 Free # Software Foundation, Inc. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2, or (at your option) # any later version. # This program 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 General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program. If not, see . # As a special exception to the GNU General Public License, if you # distribute this file as part of a program that contains a # configuration script generated by Autoconf, you may include it under # the same distribution terms that you use for the rest of that program. # Originally written by Alexandre Oliva . case $1 in '') echo "$0: No command. Try \`$0 --help' for more information." 1>&2 exit 1; ;; -h | --h*) cat <<\EOF Usage: depcomp [--help] [--version] PROGRAM [ARGS] Run PROGRAMS ARGS to compile a file, generating dependencies as side-effects. Environment variables: depmode Dependency tracking mode. source Source file read by `PROGRAMS ARGS'. object Object file output by `PROGRAMS ARGS'. DEPDIR directory where to store dependencies. depfile Dependency file to output. tmpdepfile Temporary file to use when outputing dependencies. libtool Whether libtool is used (yes/no). Report bugs to . EOF exit $? ;; -v | --v*) echo "depcomp $scriptversion" exit $? ;; esac if test -z "$depmode" || test -z "$source" || test -z "$object"; then echo "depcomp: Variables source, object and depmode must be set" 1>&2 exit 1 fi # Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po. depfile=${depfile-`echo "$object" | sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`} tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`} rm -f "$tmpdepfile" # Some modes work just like other modes, but use different flags. We # parameterize here, but still list the modes in the big case below, # to make depend.m4 easier to write. Note that we *cannot* use a case # here, because this file can only contain one case statement. if test "$depmode" = hp; then # HP compiler uses -M and no extra arg. gccflag=-M depmode=gcc fi if test "$depmode" = dashXmstdout; then # This is just like dashmstdout with a different argument. dashmflag=-xM depmode=dashmstdout fi cygpath_u="cygpath -u -f -" if test "$depmode" = msvcmsys; then # This is just like msvisualcpp but w/o cygpath translation. # Just convert the backslash-escaped backslashes to single forward # slashes to satisfy depend.m4 cygpath_u="sed s,\\\\\\\\,/,g" depmode=msvisualcpp fi case "$depmode" in gcc3) ## gcc 3 implements dependency tracking that does exactly what ## we want. Yay! Note: for some reason libtool 1.4 doesn't like ## it if -MD -MP comes after the -MF stuff. Hmm. ## Unfortunately, FreeBSD c89 acceptance of flags depends upon ## the command line argument order; so add the flags where they ## appear in depend2.am. Note that the slowdown incurred here ## affects only configure: in makefiles, %FASTDEP% shortcuts this. for arg do case $arg in -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;; *) set fnord "$@" "$arg" ;; esac shift # fnord shift # $arg done "$@" stat=$? if test $stat -eq 0; then : else rm -f "$tmpdepfile" exit $stat fi mv "$tmpdepfile" "$depfile" ;; gcc) ## There are various ways to get dependency output from gcc. Here's ## why we pick this rather obscure method: ## - Don't want to use -MD because we'd like the dependencies to end ## up in a subdir. Having to rename by hand is ugly. ## (We might end up doing this anyway to support other compilers.) ## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like ## -MM, not -M (despite what the docs say). ## - Using -M directly means running the compiler twice (even worse ## than renaming). if test -z "$gccflag"; then gccflag=-MD, fi "$@" -Wp,"$gccflag$tmpdepfile" stat=$? if test $stat -eq 0; then : else rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" echo "$object : \\" > "$depfile" alpha=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz ## The second -e expression handles DOS-style file names with drive letters. sed -e 's/^[^:]*: / /' \ -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile" ## This next piece of magic avoids the `deleted header file' problem. ## The problem is that when a header file which appears in a .P file ## is deleted, the dependency causes make to die (because there is ## typically no way to rebuild the header). We avoid this by adding ## dummy dependencies for each header file. Too bad gcc doesn't do ## this for us directly. tr ' ' ' ' < "$tmpdepfile" | ## Some versions of gcc put a space before the `:'. On the theory ## that the space means something, we add a space to the output as ## well. ## Some versions of the HPUX 10.20 sed can't process this invocation ## correctly. Breaking it into two sed invocations is a workaround. sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; hp) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. 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We also remove comment lines; # the IRIX cc adds comments like `#:fec' to the end of the # dependency line. tr ' ' ' ' < "$tmpdepfile" \ | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' | \ tr ' ' ' ' >> "$depfile" echo >> "$depfile" # The second pass generates a dummy entry for each header file. tr ' ' ' ' < "$tmpdepfile" \ | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \ >> "$depfile" else # The sourcefile does not contain any dependencies, so just # store a dummy comment line, to avoid errors with the Makefile # "include basename.Plo" scheme. echo "#dummy" > "$depfile" fi rm -f "$tmpdepfile" ;; aix) # The C for AIX Compiler uses -M and outputs the dependencies # in a .u file. In older versions, this file always lives in the # current directory. Also, the AIX compiler puts `$object:' at the # start of each line; $object doesn't have directory information. # Version 6 uses the directory in both cases. dir=`echo "$object" | sed -e 's|/[^/]*$|/|'` test "x$dir" = "x$object" && dir= base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'` if test "$libtool" = yes; then tmpdepfile1=$dir$base.u tmpdepfile2=$base.u tmpdepfile3=$dir.libs/$base.u "$@" -Wc,-M else tmpdepfile1=$dir$base.u tmpdepfile2=$dir$base.u tmpdepfile3=$dir$base.u "$@" -M fi stat=$? if test $stat -eq 0; then : else rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" exit $stat fi for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" do test -f "$tmpdepfile" && break done if test -f "$tmpdepfile"; then # Each line is of the form `foo.o: dependent.h'. # Do two passes, one to just change these to # `$object: dependent.h' and one to simply `dependent.h:'. sed -e "s,^.*\.[a-z]*:,$object:," < "$tmpdepfile" > "$depfile" # That's a tab and a space in the []. sed -e 's,^.*\.[a-z]*:[ ]*,,' -e 's,$,:,' < "$tmpdepfile" >> "$depfile" else # The sourcefile does not contain any dependencies, so just # store a dummy comment line, to avoid errors with the Makefile # "include basename.Plo" scheme. echo "#dummy" > "$depfile" fi rm -f "$tmpdepfile" ;; icc) # Intel's C compiler understands `-MD -MF file'. However on # icc -MD -MF foo.d -c -o sub/foo.o sub/foo.c # ICC 7.0 will fill foo.d with something like # foo.o: sub/foo.c # foo.o: sub/foo.h # which is wrong. We want: # sub/foo.o: sub/foo.c # sub/foo.o: sub/foo.h # sub/foo.c: # sub/foo.h: # ICC 7.1 will output # foo.o: sub/foo.c sub/foo.h # and will wrap long lines using \ : # foo.o: sub/foo.c ... \ # sub/foo.h ... \ # ... "$@" -MD -MF "$tmpdepfile" stat=$? if test $stat -eq 0; then : else rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" # Each line is of the form `foo.o: dependent.h', # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'. # Do two passes, one to just change these to # `$object: dependent.h' and one to simply `dependent.h:'. sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile" # Some versions of the HPUX 10.20 sed can't process this invocation # correctly. Breaking it into two sed invocations is a workaround. sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; hp2) # The "hp" stanza above does not work with aCC (C++) and HP's ia64 # compilers, which have integrated preprocessors. The correct option # to use with these is +Maked; it writes dependencies to a file named # 'foo.d', which lands next to the object file, wherever that # happens to be. # Much of this is similar to the tru64 case; see comments there. dir=`echo "$object" | sed -e 's|/[^/]*$|/|'` test "x$dir" = "x$object" && dir= base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'` if test "$libtool" = yes; then tmpdepfile1=$dir$base.d tmpdepfile2=$dir.libs/$base.d "$@" -Wc,+Maked else tmpdepfile1=$dir$base.d tmpdepfile2=$dir$base.d "$@" +Maked fi stat=$? if test $stat -eq 0; then : else rm -f "$tmpdepfile1" "$tmpdepfile2" exit $stat fi for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" do test -f "$tmpdepfile" && break done if test -f "$tmpdepfile"; then sed -e "s,^.*\.[a-z]*:,$object:," "$tmpdepfile" > "$depfile" # Add `dependent.h:' lines. sed -ne '2,${ s/^ *// s/ \\*$// s/$/:/ p }' "$tmpdepfile" >> "$depfile" else echo "#dummy" > "$depfile" fi rm -f "$tmpdepfile" "$tmpdepfile2" ;; tru64) # The Tru64 compiler uses -MD to generate dependencies as a side # effect. `cc -MD -o foo.o ...' puts the dependencies into `foo.o.d'. # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put # dependencies in `foo.d' instead, so we check for that too. # Subdirectories are respected. dir=`echo "$object" | sed -e 's|/[^/]*$|/|'` test "x$dir" = "x$object" && dir= base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'` if test "$libtool" = yes; then # With Tru64 cc, shared objects can also be used to make a # static library. 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"$@" || exit $? # Remove the call to Libtool. if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi # Remove `-o $object'. IFS=" " for arg do case $arg in -o) shift ;; $object) shift ;; *) set fnord "$@" "$arg" shift # fnord shift # $arg ;; esac done test -z "$dashmflag" && dashmflag=-M # Require at least two characters before searching for `:' # in the target name. This is to cope with DOS-style filenames: # a dependency such as `c:/foo/bar' could be seen as target `c' otherwise. "$@" $dashmflag | sed 's:^[ ]*[^: ][^:][^:]*\:[ ]*:'"$object"'\: :' > "$tmpdepfile" rm -f "$depfile" cat < "$tmpdepfile" > "$depfile" tr ' ' ' ' < "$tmpdepfile" | \ ## Some versions of the HPUX 10.20 sed can't process this invocation ## correctly. Breaking it into two sed invocations is a workaround. sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; dashXmstdout) # This case only exists to satisfy depend.m4. It is never actually # run, as this mode is specially recognized in the preamble. exit 1 ;; makedepend) "$@" || exit $? # Remove any Libtool call if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi # X makedepend shift cleared=no eat=no for arg do case $cleared in no) set ""; shift cleared=yes ;; esac if test $eat = yes; then eat=no continue fi case "$arg" in -D*|-I*) set fnord "$@" "$arg"; shift ;; # Strip any option that makedepend may not understand. Remove # the object too, otherwise makedepend will parse it as a source file. -arch) eat=yes ;; -*|$object) ;; *) set fnord "$@" "$arg"; shift ;; esac done obj_suffix=`echo "$object" | sed 's/^.*\././'` touch "$tmpdepfile" ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@" rm -f "$depfile" cat < "$tmpdepfile" > "$depfile" sed '1,2d' "$tmpdepfile" | tr ' ' ' ' | \ ## Some versions of the HPUX 10.20 sed can't process this invocation ## correctly. Breaking it into two sed invocations is a workaround. sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" "$tmpdepfile".bak ;; cpp) # Important note: in order to support this mode, a compiler *must* # always write the preprocessed file to stdout. "$@" || exit $? # Remove the call to Libtool. if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi # Remove `-o $object'. 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"$@" || exit $? # Remove the call to Libtool. if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi IFS=" " for arg do case "$arg" in -o) shift ;; $object) shift ;; "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI") set fnord "$@" shift shift ;; *) set fnord "$@" "$arg" shift shift ;; esac done "$@" -E 2>/dev/null | sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile" rm -f "$depfile" echo "$object : \\" > "$depfile" sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s:: \1 \\:p' >> "$depfile" echo " " >> "$depfile" sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile" rm -f "$tmpdepfile" ;; msvcmsys) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; none) exec "$@" ;; *) echo "Unknown depmode $depmode" 1>&2 exit 1 ;; esac exit 0 # Local Variables: # mode: shell-script # sh-indentation: 2 # eval: (add-hook 'write-file-hooks 'time-stamp) # time-stamp-start: "scriptversion=" # time-stamp-format: "%:y-%02m-%02d.%02H" # time-stamp-time-zone: "UTC" # time-stamp-end: "; # UTC" # End: fair-0.5.3/install-sh0000755167275116727510000003253711500011217011423 00000000000000#!/bin/sh # install - install a program, script, or datafile scriptversion=2009-04-28.21; # UTC # This originates from X11R5 (mit/util/scripts/install.sh), which was # later released in X11R6 (xc/config/util/install.sh) with the # following copyright and license. # # Copyright (C) 1994 X Consortium # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to # deal in the Software without restriction, including without limitation the # rights to use, copy, modify, merge, publish, distribute, sublicense, and/or # sell copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN # AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC- # TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. # # Except as contained in this notice, the name of the X Consortium shall not # be used in advertising or otherwise to promote the sale, use or other deal- # ings in this Software without prior written authorization from the X Consor- # tium. # # # FSF changes to this file are in the public domain. # # Calling this script install-sh is preferred over install.sh, to prevent # `make' implicit rules from creating a file called install from it # when there is no Makefile. # # This script is compatible with the BSD install script, but was written # from scratch. nl=' ' IFS=" "" $nl" # set DOITPROG to echo to test this script # Don't use :- since 4.3BSD and earlier shells don't like it. doit=${DOITPROG-} if test -z "$doit"; then doit_exec=exec else doit_exec=$doit fi # Put in absolute file names if you don't have them in your path; # or use environment vars. chgrpprog=${CHGRPPROG-chgrp} chmodprog=${CHMODPROG-chmod} chownprog=${CHOWNPROG-chown} cmpprog=${CMPPROG-cmp} cpprog=${CPPROG-cp} mkdirprog=${MKDIRPROG-mkdir} mvprog=${MVPROG-mv} rmprog=${RMPROG-rm} stripprog=${STRIPPROG-strip} posix_glob='?' initialize_posix_glob=' test "$posix_glob" != "?" || { if (set -f) 2>/dev/null; then posix_glob= else posix_glob=: fi } ' posix_mkdir= # Desired mode of installed file. mode=0755 chgrpcmd= chmodcmd=$chmodprog chowncmd= mvcmd=$mvprog rmcmd="$rmprog -f" stripcmd= src= dst= dir_arg= dst_arg= copy_on_change=false no_target_directory= usage="\ Usage: $0 [OPTION]... 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This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: init.h 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/init.h $ ******************************************************************************/ #ifndef INIT_H #define INIT_H #include "fair.h" extern bool init_signals(void); extern bool init_privs(void); extern void init_limits(void); extern bool init_daemon(void); extern bool init_hupped; #endif fair-0.5.3/src/options.h0000664167275116727510000000444311666127070012071 00000000000000/****************************************************************************** options.h -- the configuration options that "fair" accepts Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: options.h 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/options.h $ ******************************************************************************/ #ifndef _ConfigVal #define _ConfigVal(k,d) #endif #ifndef _StringConfigVal #define _StringConfigVal(s,d) _ConfigVal(s,d) #endif #ifndef _BoolConfigVal #define _BoolConfigVal(b,d) _ConfigVal(b,d) #endif #ifndef _StampConfigVal #define _StampConfigVal(t,d) _ConfigVal(t,d) #endif #ifndef _SizeConfigVal #define _SizeConfigVal(s,d) _ConfigVal(s,d) #endif #ifndef _RegexConfigVal #define _RegexConfigVal(r,d) _ConfigVal(r,d) #endif _BoolConfigVal(Debug, "no") _BoolConfigVal(DropPrivs, "yes") _StringConfigVal(PidFile, "/var/run/fair.pid") _StringConfigVal(UserID, "nobody") _StringConfigVal(GroupID, "nogroup") _StringConfigVal(WorkerService, "smtp") _StringConfigVal(TransponderService, "rlp") _StringConfigVal(BalancerService, conf_WorkerService) _SizeConfigVal(ConnectAttempts, "3") _StampConfigVal(ConnectTimeout, "1") _StampConfigVal(IdleTimeout, "300") _StampConfigVal(PingTimeout, "0.5") _StampConfigVal(PingInterval, "0.1") _StampConfigVal(BenchPeriod, "5") _StampConfigVal(TrailPeriod, "60") _SizeConfigVal(MaxCapacity, "100") _SizeConfigVal(Hysteresis, "0") _SizeConfigVal(MinBurst, "1450") _SizeConfigVal(MaxBurst, "65536") _BoolConfigVal(LocalTCP, "yes") _RegexConfigVal(AllowUDP, "^") #undef _ConfigVal #undef _StringConfigVal #undef _BoolConfigVal #undef _StampConfigVal #undef _SizeConfigVal #undef _RegexConfigVal fair-0.5.3/src/protocol.h0000664167275116727510000000226511666127070012237 00000000000000/****************************************************************************** protocol.h -- data structure describing the "fair" protocol Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: protocol.h 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/protocol.h $ ******************************************************************************/ #ifndef PROTOCOL_H #define PROTOCOL_H #include "fair.h" #define PROTOCOL_VERSION 0 #define PROTOCOL_SIZE 4 typedef struct loadping { u8 version; u8 hostlen; u16 capacity; } loadping_t; #endif fair-0.5.3/src/fair.h0000664167275116727510000000371211666127070011315 00000000000000/****************************************************************************** fair.h -- common header file for the "fair" project Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: fair.h 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/fair.h $ ******************************************************************************/ #ifndef FAIR_H #define FAIR_H #include #include #include "error.h" #include "config.h" #ifdef TRUE #undef TRUE #endif #ifdef FALSE #undef FALSE #endif #define TRUE true #define FALSE false #ifndef SOCK_UNSPEC #define SOCK_UNSPEC 0 #endif #ifndef PROTO_UNSPEC #define PROTO_UNSPEC 0 #endif typedef long double real; typedef unsigned char byte; typedef int_least8_t s8; typedef uint_least8_t u8; typedef int_least16_t s16; typedef uint_least16_t u16; typedef int_least32_t s32; typedef uint_least32_t u32; typedef int_least64_t s64; typedef uint_least64_t u64; typedef s32 unichar_t; #undef assert #ifdef DEBUG #define assert(x) do { if(!(x)) syslog_exit(LOG_ERR, "Internal error: assert(%s) failed at %s:%d; program exit", #x, __FILE__, __LINE__); } while(FALSE) #define unless(x) if(!(x) && (syslog_exit(LOG_ERR, "Internal error: assert(%s) failed at %s:%d; program exit", #x, __FILE__, __LINE__), TRUE)) #else #define assert(x) #define unless(x) if(!(x)) #endif #endif fair-0.5.3/src/chrono.h0000664167275116727510000000343711666127070011670 00000000000000/****************************************************************************** chrono.h -- timer and timestamp functionality Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: chrono.h 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/chrono.h $ ******************************************************************************/ #ifndef CHRONO_H #define CHRONO_H #include #include #include "fair.h" #define STAMP_TICKS 1000000LL typedef s64 stamp_t; extern stamp_t now; struct chrono; typedef void (*chrono_hook_t)(struct chrono *); typedef struct chrono { avl_node_t node; avl_tree_t *tree; stamp_t expiry; chrono_hook_t func; void *data; } chrono_t; extern unsigned int chrono_count(void); extern chrono_t *chrono_new(chrono_hook_t, void *); extern void chrono_at(chrono_t *, stamp_t); extern void chrono_after(chrono_t *, stamp_t); extern void chrono_disable(chrono_t *); extern void chrono_delete(chrono_t *); extern stamp_t chrono_events(void); extern stamp_t stamp_get(const struct timeval *); extern void stamp_sync(void); extern void stamp_tv(struct timeval *, stamp_t); extern void stamp_now(struct timeval *); #endif fair-0.5.3/src/conf.c0000664167275116727510000001467511666127070011326 00000000000000/****************************************************************************** conf.c -- handle the configuration file Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: conf.c 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/conf.c $ ******************************************************************************/ #include #include #include #include #include #include #include #include "fair.h" #include "chrono.h" #include "error.h" #include "conf.h" #include static bool set_string(const char **holder, const char *val) { unless(val) return FALSE; if(holder) { if(*holder) free((char *)*holder); *holder = xstrdup(val); } return TRUE; } static bool set_bool(bool *holder, const char *val) { bool r; unless(val) return FALSE; if(!strcasecmp(val, "y") || !strcasecmp(val, "yes") || !strcasecmp(val, "t") || !strcasecmp(val, "true") || !strcasecmp(val, "1") || !strcasecmp(val, "on")) r = TRUE; else if(!strcasecmp(val, "n") || !strcasecmp(val, "no") || !strcasecmp(val, "f") || !strcasecmp(val, "false") || !strcasecmp(val, "0") || !strcasecmp(val, "off")) r = FALSE; else return syslog(LOG_CRIT, "Unrecognized boolean value: '%s'.", val), FALSE; if(holder) *holder = r; return TRUE; } static bool set_stamp(stamp_t *holder, const char *val) { char *end; double v; unless(val) return FALSE; errno = 0; v = strtod(val, &end); if(errno) return syslog(LOG_CRIT, "Error parsing number: %m."), FALSE; if(end == val || !end || *end) return syslog(LOG_CRIT, "Error parsing '%s' as a number.", val), FALSE; if(holder) *holder = v * (double)STAMP_TICKS; return TRUE; } static bool set_size(size_t *holder, const char *val) { char *end; unsigned long long u; size_t s; unless(val) return FALSE; u = strtoull(val, &end, 0); s = u; if(end == val || !end || *end || s != u) return syslog_exit(LOG_CRIT, "Error parsing \"%s\" as a number.", val), FALSE; if(holder) *holder = s; return TRUE; } static bool set_regex(regex_t **holder, const char *val) { regex_t *re, *re_swap; int err; size_t len; char *msg = NULL; bool r = FALSE; unless(val) return FALSE; re = xalloc(sizeof *re); err = regcomp(re, val, REG_EXTENDED|REG_NOSUB); if(err) { len = regerror(err, re, NULL, 0); msg = alloca(len); assert(msg); regerror(err, re, msg, len); syslog(LOG_ERR, "Error compiling regex: %s", msg); } else { if(holder) { re_swap = *holder; *holder = re; re = re_swap; } r = TRUE; } if(re) { regfree(re); free(re); } return r; } #define _StringConfigVal(s,d) const char *conf_##s = NULL; \ static bool set_##s(const char *str, bool dryrun) \ { return set_string(dryrun ? NULL : &conf_##s, str); } #define _BoolConfigVal(b,d) bool conf_##b = FALSE; \ static bool set_##b(const char *str, bool dryrun) \ { return set_bool(dryrun ? NULL : &conf_##b, str); } #define _StampConfigVal(t,d) stamp_t conf_##t = 0LL; \ static bool set_##t(const char *str, bool dryrun) \ { return set_stamp(dryrun ? NULL : &conf_##t, str); } #define _SizeConfigVal(s,d) size_t conf_##s = 0; \ static bool set_##s(const char *str, bool dryrun) \ { return set_size(dryrun ? NULL : &conf_##s, str); } #define _RegexConfigVal(r,d) regex_t *conf_##r = NULL; \ static bool set_##r(const char *str, bool dryrun) \ { return set_regex(dryrun ? NULL : &conf_##r, str); } #include "options.h" static int optcmp(const option_t *a, const option_t *b) { assert(a && b); return strcasecmp(a->name, b->name); } static avl_tree_t options = {NULL, NULL, NULL, (avl_compare_t)optcmp, NULL}; static option_t *option_byname(const char *key) { avl_node_t *n; struct option_t *opt; size_t len; unless(key) return NULL; len = strlen(key); opt = alloca(sizeof *opt + len); unless(opt) return NULL; strcpy(opt->name, key); n = avl_search(&options, opt); return n ? n->item : NULL; } static option_t *option_new(const char *key, bool (*set)(const char *, bool), const char *def) { option_t *opt; size_t len; assert(key && set && def); len = strlen(key); opt = xalloc(sizeof *opt + len); avl_init_node(&opt->node, opt); strcpy(opt->name, key); opt->set = set; set(def, FALSE); if(!avl_insert_node(&options, &opt->node)) syslog_exit(LOG_CRIT, "Internal error: duplicate configuration key %s", key); return opt; } static void config_init(void) { static bool done = FALSE; if(done) return; #define _ConfigVal(k,d) option_new(#k, set_##k, d); #include "options.h" done = TRUE; } static void conf_reset(void) { #define _ConfigVal(k,d) set_##k(d, FALSE); #include "options.h" } static char *chop(char *s) { char *end; unless(s) return NULL; while(isspace(*s)) s++; if(!*s) return s; end = s + strlen(s) - 1; while(isspace(*end)) *end-- = '\0'; return s; } bool conf_load(const char *config, bool dryrun) { FILE *f; char buf[65536]; option_t *opt; char *key, *value; int lineno = 0; bool good = TRUE; if(!config) config = FAIRCONF_PATH; config_init(); /* Read the options but fail if there's no default for it */ f = fopen(config, "r"); if(!f) { syslog(LOG_ERR, "Can't open configfile %s: %m", config); return FALSE; } while(fgets(buf, sizeof buf, f)) { lineno++; key = chop(buf); if(*key && *key != '#') { value = strchr(key, '='); if(value) { *value++ = '\0'; key = chop(key); opt = option_byname(key); if(opt) { assert(opt->set); if(!opt->set(chop(value), dryrun)) good = FALSE; } else { syslog(LOG_ERR, "Unknown option `%s' at %s:%d", key, config, lineno); good = FALSE; } } else { syslog(LOG_ERR, "Syntax error in %s:%d", config, lineno); good = FALSE; } } } fclose(f); return good; } bool conf_reload(const char *config) { if(!conf_load(config, TRUE)) return FALSE; conf_reset(); return conf_load(config, FALSE); } fair-0.5.3/src/conf.h0000664167275116727510000000337211666127070011323 00000000000000/****************************************************************************** conf.h -- handle the configuration file Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: conf.h 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/conf.h $ ******************************************************************************/ #ifndef CONF_H #define CONF_H #include #include #include "chrono.h" typedef struct option_t { avl_node_t node; bool (*set)(const char *s, bool); char name[1]; } option_t; extern bool conf_load(const char *, bool); extern bool conf_reload(const char *); #undef _StringConfigVal #undef _BoolConfigVal #undef _StampConfigVal #undef _SizeConfigVal #undef _RegexConfigVal #define _StringConfigVal(s,d) extern const char *conf_##s; #define _BoolConfigVal(b,d) extern bool conf_##b; #define _StampConfigVal(t,d) extern stamp_t conf_##t; #define _SizeConfigVal(s,d) extern size_t conf_##s; #define _RegexConfigVal(r,d) extern regex_t *conf_##r; #include "options.h" #undef _StringConfigVal #undef _BoolConfigVal #undef _StampConfigVal #undef _SizeConfigVal #undef _RegexConfigVal #endif fair-0.5.3/src/error.c0000664167275116727510000000407111666127070011517 00000000000000/****************************************************************************** error.c -- error handling/printing Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: error.c 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/error.c $ ******************************************************************************/ #include #include #include #include #include #include #include #include "error.h" void error_exit(const char *msg, ...) { va_list ap; va_start(ap, msg); vfprintf(stderr, msg, ap); va_end(ap); fputc('\n', stderr); fflush(stderr); exit(1); } int eprintf(const char *msg, ...) { int r; va_list ap; va_start(ap, msg); r = vfprintf(stderr, msg, ap); va_end(ap); fflush(stderr); return r; } int eputs(const char *msg) { return eprintf("%s\n", msg); } void perror_exit(const char *msg) { perror(msg); fflush(stderr); exit(1); } void *xalloc(size_t z) { void *r; r = malloc(z); if(!r) syslog_exit(LOG_CRIT, "malloc() failed: %m. Program exit."); return memset(r, 'A', z); } void *xrealloc(void *r, size_t z) { r = realloc(r, z); if(!r) syslog_exit(LOG_CRIT, "realloc() failed: %m. Program exit."); return r; } char *xstrdup(const char *s) { char *d; if(!s) syslog_exit(LOG_CRIT, "xstrdup(NULL)\n. Program exit."); d = strdup(s); if(!d) syslog_exit(LOG_CRIT, "strdup() failed\n: %m. Program exit."); return d; } fair-0.5.3/src/error.h0000664167275116727510000000301511666127070011521 00000000000000/****************************************************************************** error.h -- error handling/printing Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: error.h 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/error.h $ ******************************************************************************/ #ifndef ERROR_H #define ERROR_H #include #include #include #define syslog_exit(...) exit((syslog(__VA_ARGS__), 1)) extern int eprintf(const char *, ...) __attribute__((format(printf, 1, 2))); extern int eputs(const char *); extern void perror_exit(const char *) __attribute__((noreturn)); extern void error_exit(const char *, ...) __attribute__((noreturn, format(printf, 1, 2))); extern void *xalloc(size_t) __attribute__((malloc)); extern void *xrealloc(void *, size_t); extern char *xstrdup(const char *) __attribute__((malloc)); #endif fair-0.5.3/src/init.c0000664167275116727510000000636011666127070011334 00000000000000/****************************************************************************** init.c -- set up the UNIX environment Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: init.c 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/init.c $ ******************************************************************************/ #include #include #include #include #include #include #include #include #include #include "fair.h" #include "error.h" #include "conf.h" #include "init.h" bool init_hupped = FALSE; static void init_log_exit(int sig) { syslog(LOG_CRIT, "Received signal %d. Program exit.", sig); exit(128 + sig); } static void init_sighup(int sig) { syslog(LOG_INFO, "Received SIGHUP, scheduling config file reload."); init_hupped = TRUE; } bool init_signals(void) { static struct sigaction sa = {{0}}; static int ignore[] = { SIGIO, SIGURG, SIGCONT, SIGPIPE, SIGALRM, SIGUSR1, SIGUSR2, SIGTTIN, SIGTTOU, SIGWINCH, SIGVTALRM }; static int traplog[] = { SIGINT, SIGQUIT, SIGSEGV, SIGILL, SIGBUS, SIGABRT, SIGTERM, SIGXCPU }; int i; sa.sa_handler = SIG_IGN; i = sizeof ignore / sizeof *ignore; while(i) if(sigaction(ignore[--i], &sa, NULL) == -1) return FALSE; sa.sa_handler = init_log_exit; i = sizeof traplog / sizeof *traplog; while(i) if(sigaction(traplog[--i], &sa, NULL) == -1) return FALSE; sa.sa_handler = init_sighup; if(sigaction(SIGHUP, &sa, NULL) == -1) return FALSE; return TRUE; } void init_limits(void) { struct rlimit rlim; int i; for(i = 10; i < 16; i++) { rlim.rlim_cur = rlim.rlim_max = 1 << i; setrlimit(RLIMIT_NOFILE, &rlim); } rlim.rlim_cur = rlim.rlim_max = RLIM_INFINITY; setrlimit(RLIMIT_NOFILE, &rlim); setrlimit(RLIMIT_STACK, &rlim); setrlimit(RLIMIT_FSIZE, &rlim); if(conf_Debug) setrlimit(RLIMIT_CORE, &rlim); } bool init_privs(void) { struct passwd *user; struct group *group; assert(conf_UserID); user = getpwnam(conf_UserID); if(!user) return FALSE; assert(conf_GroupID); group = getgrnam(conf_GroupID); if(!group) return FALSE; if(setgid(group->gr_gid) == -1) return FALSE; if(initgroups(user->pw_name, group->gr_gid) == -1) return FALSE; if(setuid(user->pw_uid) == -1) return FALSE; return TRUE; } bool init_daemon() { FILE *f; int err; pid_t pid; err = daemon(FALSE, FALSE); if(err) return FALSE; pid = getpid(); if(pid == -1) return FALSE; assert(conf_PidFile); f = fopen(conf_PidFile, "w"); if(!f) return FALSE; fprintf(f, "%ld\n", (long)pid); fclose(f); return TRUE; } fair-0.5.3/src/address.c0000664167275116727510000001413411666127070012014 00000000000000/****************************************************************************** address.c -- struct sockaddr bookkeeping Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: address.c 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/address.c $ ******************************************************************************/ #include #include #include #include #include #include #include #include #include #include "fair.h" #include "error.h" #include "worker.h" #include "chrono.h" #include "conf.h" #include "address.h" static unsigned int address_number = 0; static address_t address_0 = {{0}}; bool address_string_sa(address_string_t *str, const struct sockaddr *sa, socklen_t len) { int err; unless(str) return FALSE; unless(sa) { strcpy(str->host, "(null)"); strcpy(str->serv, "(null)"); return FALSE; } err = getnameinfo(sa, len, str->host, sizeof str->host, str->serv, sizeof str->serv, NI_NUMERICHOST|NI_NUMERICSERV); if(err) { syslog(LOG_WARNING, "getnameinfo(NI_NUMERICHOST|NI_NUMERICSERV): %s.", gai_strerror(err)); strcpy(str->host, "(err)"); strcpy(str->serv, "(err)"); return FALSE; } return TRUE; } bool address_string(address_string_t *str, const address_t *addr) { unless(addr) { strcpy(str->host, "(null)"); strcpy(str->serv, "(null)"); return FALSE; } return address_string_sa(str, address_sa(addr), addr->len); } int address_cmp_addr(const address_t *aa, const address_t *ba) { socklen_t al, bl; if(aa && !ba) return -1; if(!aa && ba) return 1; al = aa->len; bl = ba->len; if(al < bl) return -1; if(al > bl) return 1; return memcmp(aa + 1, ba + 1, al); } int address_cmp_prio(const address_t *aa, const address_t *ba) { bool ab, bb; u32 ar, br; #if 0 sa_family_t af, bf; #endif if(aa && !ba) return -1; if(!aa && ba) return 1; ab = aa->disabled; bb = ba->disabled; if(!ab && bb) return -1; if(ab && !bb) return 1; ab = aa->dead; bb = ba->dead; if(!ab && bb) return -1; if(ab && !bb) return 1; ar = aa->nconn; br = ba->nconn; if(ar < br) return -1; if(ar > br) return 1; ar = aa->errors; br = ba->errors; if(ar < br) return -1; if(ar > br) return 1; #if 0 af = address_sa(aa)->sa_family; bf = address_sa(ba)->sa_family; if(af > bf) return -1; if(af < bf) return 1; if(aa < ba) return -1; if(aa > ba) return 1; #endif return 0; } static void address_enable(chrono_t *cr) { address_t *addr; unless(cr) return; addr = cr->data; unless(addr) return; addr->disabled = FALSE; if(addr->func) addr->func(addr, ADDRESS_EVENT_STATECHANGE); } static void address_disable(address_t *addr) { unless(addr) return; addr->disabled = TRUE; if(addr->func) addr->func(addr, ADDRESS_EVENT_STATECHANGE); chrono_after(addr->whip, conf_BenchPeriod * addr->errors); } void address_working(address_t *addr) { u8 olderrors; unless(addr) return; olderrors = addr->errors; if(olderrors) addr->errors = olderrors - 1; } void address_broken(address_t *addr) { u8 errors, olderrors; unless(addr) return; if(!addr->disabled) { olderrors = addr->errors; errors = olderrors + 1; if(errors < olderrors) errors = ~0; if(errors != olderrors) addr->errors = errors; address_disable(addr); } } void address_update(address_t *addr) { unless(addr) return; chrono_after(addr->timer, conf_PingTimeout); if(addr->dead) { addr->dead = FALSE; syslog(LOG_WARNING, "worker node %s %s alive again", addr->str.host, addr->str.serv); if(addr->func) addr->func(addr, ADDRESS_EVENT_STATECHANGE); } } static void address_decay(chrono_t *cr) { address_t *addr; unless(cr) return; addr = cr->data; unless(addr) return; if(!addr->dead) { addr->dead = TRUE; syslog(LOG_WARNING, "worker node %s %s timed out", addr->str.host, addr->str.serv); if(addr->func) addr->func(addr, ADDRESS_EVENT_STATECHANGE); } } unsigned int address_count(void) { return address_number; } bool address_authorized(const struct sockaddr *sa, socklen_t len) { address_string_t str; unless(sa && len > 0) return FALSE; address_string_sa(&str, sa, len); if(regexec(conf_AllowUDP, str.host, 0, NULL, 0)) { syslog(LOG_WARNING, "Unauthorized address: %s %s", str.host, str.serv); return FALSE; } return TRUE; } address_t *address_new(const struct sockaddr *sa, socklen_t len, address_hook_t func, void *data) { address_t *addr; unless(sa && len > 0) return NULL; addr = xalloc(sizeof *addr + len); *addr = address_0; addr->func = func; addr->data = data; memcpy(addr+1, sa, addr->len = len); avl_init_node(&addr->node, addr); avl_init_node(&addr->prio, addr); address_string_sa(&addr->str, sa, len); addr->timer = chrono_new(address_decay, addr); addr->whip = chrono_new(address_enable, addr); chrono_after(addr->timer, conf_PingTimeout); address_number++; return addr; } address_t *address_byaddr(avl_tree_t *t, const struct sockaddr *sa, socklen_t len) { avl_node_t *n; address_t *addr; unless(t) return NULL; unless(sa && len > 0) return NULL; addr = alloca(sizeof *addr + len); assert(addr); *addr = address_0; memcpy(addr+1, sa, addr->len = len); n = avl_search(t, addr); return n ? n->item : NULL; } void address_load(address_t *addr) { unless(addr) return; addr->nconn++; if(addr->func) addr->func(addr, ADDRESS_EVENT_LOAD); } void address_unload(address_t *addr) { unless(addr) return; addr->nconn--; if(addr->func) addr->func(addr, ADDRESS_EVENT_UNLOAD); } fair-0.5.3/src/address.h0000664167275116727510000000537611666127070012031 00000000000000/****************************************************************************** address.h -- struct sockaddr bookkeeping Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: address.h 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/address.h $ ******************************************************************************/ #ifndef ADDRESS_H #define ADDRESS_H #include #include #include #include "fair.h" #include "chrono.h" #include "worker.h" typedef enum { ADDRESS_EVENT_LOAD, ADDRESS_EVENT_UNLOAD, ADDRESS_EVENT_STATECHANGE } address_event_t; struct address; typedef void (*address_hook_t)(struct address *, address_event_t); typedef struct address_string { char host[NI_MAXHOST]; char serv[NI_MAXSERV]; } address_string_t; typedef struct address { /* for adding it to worker_t->addr */ avl_node_t node; /* for adding it to worker_t->prio */ avl_node_t prio; address_string_t str; /* timeout timer */ chrono_t *timer; /* re-enable address after errors */ chrono_t *whip; /* callback for state change notification */ address_hook_t func; void *data; socklen_t len; u16 nconn; /* timed out */ bool dead; /* benched because of errors */ bool disabled; /* number of errors that have occurred */ u8 errors; } address_t; #define address_sa(addr) ((const struct sockaddr *)((const address_t *)(addr)+1)) extern address_t *address_new(const struct sockaddr *, socklen_t, address_hook_t, void *); extern bool address_authorized(const struct sockaddr *, socklen_t); extern int address_cmp_addr(const address_t *, const address_t *); extern int address_cmp_prio(const address_t *, const address_t *); extern bool address_string(address_string_t *, const address_t *); extern bool address_string_sa(address_string_t *, const struct sockaddr *, socklen_t); extern address_t *address_byaddr(avl_tree_t *, const struct sockaddr *, socklen_t); extern void address_load(address_t *); extern void address_unload(address_t *); extern void address_working(address_t *); extern void address_broken(address_t *); extern void address_update(address_t *); extern unsigned int address_count(void); #endif fair-0.5.3/src/avlr.c0000664167275116727510000001062611666127070011335 00000000000000/***************************************************************************** avlr.c - Extra functions for the AVL-tree library. Copyright (C) 2005 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: avlr.c 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/avlr.c $ *****************************************************************************/ #include #include #include #include "avlr.h" static const avl_node_t *avl_search_leftmost_equal(const avl_tree_t *tree, const avl_node_t *node, const void *item) { avl_compare_t cmp = tree->cmp; const avl_node_t *r = node; for(;;) { for(;;) { node = node->left; if(!node) return r; if(cmp(item, node->item)) break; r = node; } for(;;) { node = node->right; if(!node) return r; if(!cmp(item, node->item)) break; } r = node; } } static const avl_node_t *avl_search_rightmost_equal(const avl_tree_t *tree, const avl_node_t *node, const void *item) { avl_compare_t cmp = tree->cmp; const avl_node_t *r = node; for(;;) { for(;;) { node = node->right; if(!node) return r; if(cmp(item, node->item)) break; r = node; } for(;;) { node = node->left; if(!node) return r; if(!cmp(item, node->item)) break; } r = node; } } avl_node_t *avl_search_rightish(const avl_tree_t *tree, const void *item, int *exact) { avl_node_t *node; avl_compare_t cmp; int c; if(!exact) exact = &c; if(!tree) return *exact = 0, NULL; node = tree->top; if(!node) return *exact = 0, NULL; cmp = tree->cmp; for(;;) { c = cmp(item, node->item); if(c < 0) { if(node->left) node = node->left; else return *exact = 0, node->prev; } else if(c > 0) { if(node->right) node = node->right; else return *exact = 0, node; } else { return *exact = 1, node; } } } avl_node_t *avl_search_left(const avl_tree_t *tree, const void *item, int *exact) { avl_node_t *node; int c; if(!exact) exact = &c; if(!tree) return *exact = 0, NULL; node = avl_search_rightish(tree, item, exact); if(*exact) return (avl_node_t *)avl_search_leftmost_equal(tree, node, item); if(node) return node->next; return tree->head; } avl_node_t *avl_search_right(const avl_tree_t *tree, const void *item, int *exact) { const avl_node_t *node; int c; if(!exact) exact = &c; node = avl_search_rightish(tree, item, exact); if(*exact) node = avl_search_rightmost_equal(tree, node, item); return (avl_node_t *)node; } avl_node_t *avl_insert_left(avl_tree_t *avltree, avl_node_t *newnode) { return avl_insert_before(avltree, avl_search_left(avltree, newnode->item, NULL), newnode); } avl_node_t *avl_insert_right(avl_tree_t *avltree, avl_node_t *newnode) { return avl_insert_after(avltree, avl_search_right(avltree, newnode->item, NULL), newnode); } avl_node_t *avl_insert_somewhere(avl_tree_t *avltree, avl_node_t *newnode) { return avl_insert_after(avltree, avl_search_rightish(avltree, newnode->item, NULL), newnode); } avl_node_t *avl_item_insert_somewhere(avl_tree_t *avltree, void *item) { avl_node_t *newnode; if(!avltree) return errno = EFAULT, NULL; newnode = avl_init_node(malloc(sizeof(avl_node_t)), item); if(newnode) return avl_insert_somewhere(avltree, newnode); return NULL; } avl_node_t *avl_item_insert_left(avl_tree_t *avltree, void *item) { avl_node_t *newnode; if(!avltree) return errno = EFAULT, NULL; newnode = avl_init_node(malloc(sizeof(avl_node_t)), item); if(newnode) return avl_insert_left(avltree, newnode); return NULL; } avl_node_t *avl_item_insert_right(avl_tree_t *avltree, void *item) { avl_node_t *newnode; if(!avltree) return errno = EFAULT, NULL; newnode = avl_init_node(malloc(sizeof(avl_node_t)), item); if(newnode) return avl_insert_right(avltree, newnode); return NULL; } fair-0.5.3/src/avlr.h0000664167275116727510000001025111666127070011334 00000000000000/***************************************************************************** avlr.h - Extra functions for the AVL-tree library. Copyright (C) 2005 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: avlr.h 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/avlr.h $ *****************************************************************************/ #include #ifndef _FAIR_AVL_H #define _FAIR_AVL_H /* Insert an item into the tree and return the new node. * If a nodes with equal items are already in the tree, this item will * be inserted to the left of all those. Returns NULL and sets errno if * memory for the new node could not be allocated. * O(lg n) */ extern avl_node_t *avl_item_insert_left(avl_tree_t *, void *); /* Insert an item into the tree and return the new node. * If a nodes with equal items are already in the tree, this item will * be inserted to the right of all those. Returns NULL and sets errno if * memory for the new node could not be allocated. * O(lg n) */ extern avl_node_t *avl_item_insert_right(avl_tree_t *, void *); /* Insert an item into the tree and return the new node. * If a nodes with equal items are already in the tree, this item will * be inserted somewhere among those. Returns NULL and sets errno if * memory for the new node could not be allocated. * O(lg n) */ extern avl_node_t *avl_item_insert_somewhere(avl_tree_t *, void *item); /* Insert a node into the tree and return it. * If a nodes with equal items are already in the tree, this node will * be inserted to the left of all those. * O(lg n) */ extern avl_node_t *avl_insert_left(avl_tree_t *, avl_node_t *); /* Insert a node into the tree and return it. * If a nodes with equal items are already in the tree, this node will * be inserted to the right of all those. * O(lg n) */ extern avl_node_t *avl_insert_right(avl_tree_t *, avl_node_t *); /* Insert a node into the tree and return it. * If a nodes with equal items are already in the tree, this node will * be inserted somewhere among those. * O(lg n) */ extern avl_node_t *avl_insert_somewhere(avl_tree_t *, avl_node_t *); /* Searches for an item, returning either the first (leftmost) exact * match, or (if no exact match could be found) the first (leftmost) * of the nodes that have an item greater than the search item. * If exact is not NULL, *exact will be set to: * 0 if the returned node is inequal or NULL * 1 if the returned node is equal * Returns NULL if no equal or greater element could be found. * O(lg n) */ extern avl_node_t *avl_search_left(const avl_tree_t *, const void *item, int *exact); /* Searches for an item, returning either the last (rightmost) exact * match, or (if no exact match could be found) the last (rightmost) * of the nodes that have an item smaller than the search item. * If exact is not NULL, *exact will be set to: * 0 if the returned node is inequal or NULL * 1 if the returned node is equal * Returns NULL if no equal or smaller element could be found. * O(lg n) */ extern avl_node_t *avl_search_right(const avl_tree_t *, const void *item, int *exact); /* Searches for an item, returning either some exact * match, or (if no exact match could be found) the last (rightmost) * of the nodes that have an item smaller than the search item. * If exact is not NULL, *exact will be set to: * 0 if the returned node is inequal or NULL * 1 if the returned node is equal * Returns NULL if no equal or smaller element could be found. * O(lg n) */ extern avl_node_t *avl_search_rightish(const avl_tree_t *, const void *item, int *exact); #endif fair-0.5.3/src/carrousel.c0000664167275116727510000001124711666127070012370 00000000000000/****************************************************************************** carrousel.c -- main loadbalancer program Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: carrousel.c 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/carrousel.c $ ******************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include "fair.h" #include "protocol.h" #include "error.h" #include "relay.h" #include "sock.h" #include "conn.h" #include "chrono.h" #include "fdcopy.h" #include "worker.h" #include "address.h" #include "init.h" #include "conf.h" static void incoming_tcp(void *_, int fd, const struct sockaddr *sa, socklen_t sa_len) { relay_new(fd, sa, sa_len); } static void klokje(chrono_t *cr) { struct tm *tm; time_t walltime = now / STAMP_TICKS; stamp_t next = (STAMP_TICKS/4) - now % (STAMP_TICKS/4); if(next < STAMP_TICKS/100) next += (STAMP_TICKS/4); if(cr) chrono_after(cr, next); tm = localtime(&walltime); eprintf("\r%04d-%02d-%02d %02d:%02d:%02d.%06d cr:%u rl:%u cn:%u fd:%u fdc:%u lst:%u wrk:%u addr:%u\033[K\r", tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec, (int)(now % STAMP_TICKS), chrono_count(), relay_count, connector_count(), fd_count(), fdcopy_count(), listener_count(), worker_count(), address_count()); } static bool strsane(const char *s, size_t len) { const char *e; unless(s && len >= 0) return FALSE; for(e = s + len; s < e; s++) if(!isprint(*s)) return FALSE; return TRUE; } static void incoming_udp(fd_t *fd, fd_event_t evt) { struct sockaddr_storage _sa; struct sockaddr *sa = (struct sockaddr *)&_sa; socklen_t len = sizeof _sa; byte buf[1024]; char *hostname; ssize_t r; loadping_t *p = (loadping_t *)buf; worker_t *w; int load; unless(fd) return; r = recvfrom(fd->fd, buf, sizeof buf - 1, 0, sa, &len); if(r < sizeof *p) return; if(p->version != PROTOCOL_VERSION) return; if(!p->hostlen) return; if(r != sizeof *p + p->hostlen) return; hostname = buf + sizeof *p; if(memchr(hostname, '\0', p->hostlen)) return; hostname[p->hostlen] = '\0'; load = ntohs(p->capacity); w = worker_byname(hostname); if(!w && strsane(hostname, p->hostlen) && address_authorized(sa, len)) w = worker_new(hostname); if(w) worker_update(w, load, sa, len); } int main(int argc, char **argv) { const char *err; int opt; char *config = NULL; while((opt = getopt(argc, argv, "c:")) != EOF) { switch(opt) { case 'c': config = strdup(optarg); break; default: syslog_exit(LOG_CRIT, "Unknown option. Program exit."); break; } } openlog("carrousel", LOG_NDELAY|LOG_PID, LOG_DAEMON); if(!init_signals()) syslog_exit(LOG_CRIT, "sigaction(): %m. Program exit."); stamp_sync(); if(!conf_load(config, FALSE)) syslog_exit(LOG_CRIT, "Error reading config file. Program exit."); init_limits(); if(conf_Debug) chrono_after(chrono_new(klokje, NULL), 0LL); err = listener_new_tcp(conf_BalancerService, incoming_tcp, NULL); if(err) syslog_exit(LOG_CRIT, "Error listening on TCP port %s: %s", conf_BalancerService, err); err = listener_new_udp(conf_TransponderService, incoming_udp, NULL); if(err) syslog_exit(LOG_CRIT, "Error listening on UDP port %s: %s", conf_TransponderService, err); if(!conf_Debug && !init_daemon()) syslog_exit(LOG_CRIT, "while backgrounding: %m. Exiting."); if(conf_DropPrivs && !init_privs()) syslog_exit(LOG_CRIT, errno == ENOENT ? "init_privs(): user/group ID not found" : "init_privs(): %m"); syslog(LOG_INFO, "carrousel started, listening on %s/tcp and %s/udp", conf_BalancerService, conf_TransponderService); for(;;) { fd_select(chrono_events()); if(init_hupped) { init_hupped = FALSE; if(conf_reload(config)) syslog(LOG_INFO, "Config reloaded."); else syslog(LOG_ERR, "Errors in config file, not reloaded"); } } return 0; } fair-0.5.3/src/chrono.c0000664167275116727510000000653411666127070011664 00000000000000/****************************************************************************** chrono.c -- timer and timestamp functionality Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: chrono.c 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/chrono.c $ ******************************************************************************/ #include #include #include #include "fair.h" #include "error.h" #include "chrono.h" #include "avlr.h" static int ptrcmp(byte *a, byte *b) { assert(a && b); return a - b; } static int chrono_cmp(const chrono_t *a, const chrono_t *b) { stamp_t x, y; assert(a && b); x = a->expiry; y = b->expiry; return x > y ? 1 : x < y ? -1 : 0; } stamp_t now = 0LL; static avl_tree_t active = {NULL, NULL, NULL, (avl_compare_t)chrono_cmp, NULL}; static avl_tree_t inactive = {NULL, NULL, NULL, (avl_compare_t)ptrcmp, NULL}; static const chrono_t chrono_0 = {{0}}; unsigned int chrono_count(void) { return avl_count(&active) + avl_count(&inactive); } stamp_t stamp_get(const struct timeval *tv) { #if STAMP_TICKS != 1000000 #error FIXME #endif unless(tv) return 0; return (stamp_t)tv->tv_sec * STAMP_TICKS + (stamp_t)tv->tv_usec; } void stamp_tv(struct timeval *tv, stamp_t when) { #if STAMP_TICKS != 1000000 #error FIXME #endif unless(tv) return; tv->tv_sec = when / STAMP_TICKS; tv->tv_usec = when % STAMP_TICKS; } void stamp_now(struct timeval *tv) { return stamp_tv(tv, now); } void stamp_sync(void) { struct timeval tv; if(gettimeofday(&tv, NULL) == -1) syslog_exit(LOG_CRIT, "gettimeofday(): %m"); now = stamp_get(&tv); } chrono_t *chrono_new(chrono_hook_t func, void *data) { chrono_t *r = xalloc(sizeof *r); *r = chrono_0; r->func = func; r->data = data; avl_init_node(&r->node, r); avl_insert_node(r->tree = &inactive, &r->node); return r; } void chrono_at(chrono_t *cr, stamp_t moment) { unless(cr) return; cr->expiry = moment; if(cr->tree) avl_unlink_node(cr->tree, &cr->node); avl_insert_right(cr->tree = &active, &cr->node); } void chrono_after(chrono_t *cr, stamp_t moment) { chrono_at(cr, now + moment); } void chrono_disable(chrono_t *cr) { unless(cr) return; if(cr->tree != &inactive) { if(cr->tree) avl_unlink_node(cr->tree, &cr->node); avl_insert_node(cr->tree = &inactive, &cr->node); } } void chrono_delete(chrono_t *cr) { unless(cr) return; if(cr->tree) avl_unlink_node(cr->tree, &cr->node); free(cr); } stamp_t chrono_events() { chrono_t *cr; while(active.head) { cr = active.head->item; assert(cr); if(cr->expiry > now) return cr->expiry - now; assert(cr->tree == &active); avl_unlink_node(&active, &cr->node); avl_insert_node(cr->tree = &inactive, &cr->node); if(cr->func) cr->func(cr); } return 0; } fair-0.5.3/src/conn.c0000664167275116727510000000542111666127070011323 00000000000000/****************************************************************************** conn.c -- create outgoing network connections Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: conn.c 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/conn.c $ ******************************************************************************/ #include #include #include #include #include #include #include #include #include "fair.h" #include "error.h" #include "fd.h" #include "conn.h" static int ptrcmp(byte *a, byte *b) { return a - b; } static avl_tree_t connectors = {NULL, NULL, NULL, (avl_compare_t)ptrcmp, NULL}; unsigned int connector_count(void) { return avl_count(&connectors); } static connector_t *connector_alloc(connect_hook_t func, void *data) { connector_t *cn; cn = xalloc(sizeof *cn); cn->func = func; cn->data = data; avl_init_node(&cn->node, cn); avl_insert_node(&connectors, &cn->node); return cn; } void connector_delete(connector_t *cn) { unless(cn) return; avl_unlink_node(&connectors, &cn->node); if(cn->fd) fd_close(cn->fd); free(cn); } static void connector_event(fd_t *fd, fd_event_t evt) { int r; socklen_t rlen = sizeof r; connector_t *cn; unless(fd) return; cn = fd->wdata; unless(cn) return; if(evt != FD_EVENT_WRITE) return; if(getsockopt(fd->fd, SOL_SOCKET, SO_ERROR, &r, &rlen)) { r = errno; syslog(LOG_ERR, "Internal error: getsockopt(): %m"); } if(r == EINPROGRESS) return; fd_write(fd, NULL, NULL); if(r) fd = NULL; else cn->fd = NULL; errno = r; if(cn->func) cn->func(cn, fd); } connector_t *connector_new(const address_t *addr, connect_hook_t func, void *data) { int f; connector_t *cn; const struct sockaddr *sa; unless(addr) return errno = EINVAL, NULL; sa = (const struct sockaddr *)(addr + 1); f = socket(sa->sa_family, SOCK_STREAM, 0); if(f == -1) return syslog(LOG_ERR, "Creating socket(SOCK_STREAM): %m"), NULL; cn = connector_alloc(func, data); assert(cn); connect(f, sa, addr->len); cn->fd = fd_new(f); assert(cn->fd); fd_write(cn->fd, connector_event, cn); return cn; } fair-0.5.3/src/conn.h0000664167275116727510000000265711666127070011340 00000000000000/****************************************************************************** conn.h -- create outgoing network connections Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: conn.h 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/conn.h $ ******************************************************************************/ #ifndef CONN_H #define CONN_H #include #include #include "address.h" #include "fd.h" struct connector; typedef void (*connect_hook_t)(struct connector *, fd_t *); typedef struct connector { avl_node_t node; fd_t *fd; connect_hook_t func; void *data; } connector_t; extern unsigned int connector_count(void); extern connector_t *connector_new(const address_t *, connect_hook_t, void *); extern void connector_delete(connector_t *); #endif fair-0.5.3/src/fd.c0000664167275116727510000001037511666127070010763 00000000000000/****************************************************************************** fd.c -- UNIX file descriptor bookkeeping and handling Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: fd.c 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/fd.c $ ******************************************************************************/ #include #include #include #include #include #include #include #include #include "fair.h" #include "chrono.h" #include "error.h" #include "fd.h" static int fd_cmp(const fd_t *a, const fd_t *b) { return a->fd - b->fd; } static bool fds_changed = FALSE; static avl_tree_t fds = {NULL, NULL, NULL, (avl_compare_t)fd_cmp, NULL}; static const fd_t fd_0 = {{0}}; unsigned int fd_count(void) { return avl_count(&fds); } fd_t *fd_new(int fd) { int f; unless(fd != -1) return NULL; f = fcntl(fd, F_GETFL); if(f == -1) return syslog(LOG_ERR, "fcntl(%d, F_GETFL): %m", fd), NULL; if(!(f & O_NONBLOCK)) { f = fcntl(fd, F_SETFL, f | O_NONBLOCK); if(f == -1) return syslog(LOG_ERR, "fcntl(%d, F_SETFL, O_NONBLOCK): %m", fd), NULL; } fd_t *r = xalloc(sizeof *r); *r = fd_0; avl_init_node(&r->node, r); avl_insert_node(&fds, &r->node); r->fd = fd; fds_changed = TRUE; return r; } void fd_close(fd_t *victim) { unless(victim) return; if(close(victim->fd) == -1) syslog(LOG_ERR, "close(): %m (internal error)."); fd_delete(victim); } void fd_delete(fd_t *victim) { unless(victim) return; avl_unlink_node(&fds, &victim->node); free(victim); fds_changed = TRUE; } void fd_read(fd_t *fd, fd_hook_t func, void *data) { unless(fd) return; fd->rfunc = func; fd->rdata = data; } void fd_write(fd_t *fd, fd_hook_t func, void *data) { unless(fd) return; fd->wfunc = func; fd->wdata = data; } void fd_oob(fd_t *fd, fd_hook_t func, void *data) { unless(fd) return; fd->ofunc = func; fd->odata = data; } fd_t *fd_byfd(int key) { avl_node_t *n; fd_t reference; reference.fd = key; n = avl_search(&fds, &reference); return n ? n->item : NULL; } static int build_fdsets(fd_set *rfds, fd_set *wfds, fd_set *ofds) { avl_node_t *n; fd_t *fdinfo; int fd, maxfd = -1; assert(rfds && wfds && ofds); FD_ZERO(rfds); FD_ZERO(wfds); FD_ZERO(ofds); for(n = fds.head; n; n = n->next) { fdinfo = n->item; unless(fdinfo) continue; fd = fdinfo->fd; unless(fd != -1) continue; if(fdinfo->rfunc) FD_SET(fd, rfds); if(fdinfo->wfunc) FD_SET(fd, wfds); if(fdinfo->ofunc) FD_SET(fd, ofds); if(fd > maxfd) maxfd = fd; } return maxfd; } static void handle_fdsets(fd_set *rfds, fd_set *wfds, fd_set *ofds) { avl_node_t *n; fd_t *fdinfo; int fd; assert(rfds && wfds && ofds); for(n = fds.head; n; n = fds_changed ? fds.head : n->next) { fds_changed = FALSE; fdinfo = n->item; unless(fdinfo) continue; fd = fdinfo->fd; unless(fd != -1) continue; if(FD_ISSET(fd, rfds) && fdinfo->rfunc) fdinfo->rfunc(fdinfo, FD_EVENT_READ); if(FD_ISSET(fd, wfds) && fdinfo->wfunc) fdinfo->wfunc(fdinfo, FD_EVENT_WRITE); if(FD_ISSET(fd, ofds) && fdinfo->ofunc) fdinfo->ofunc(fdinfo, FD_EVENT_OOB); FD_CLR(fd, rfds); FD_CLR(fd, wfds); FD_CLR(fd, ofds); } } int fd_select(stamp_t timeout) { fd_set rfds, wfds, ofds; struct timeval tv; int r, maxfd; maxfd = build_fdsets(&rfds, &wfds, &ofds); assert(maxfd < FD_SETSIZE); if(timeout) stamp_tv(&tv, timeout); r = select(maxfd + 1, &rfds, &wfds, &ofds, timeout ? &tv : NULL); if(r == -1 && errno != EINTR) syslog_exit(LOG_CRIT, "select(): %m. Program exit."); stamp_sync(); if(r > 0) handle_fdsets(&rfds, &wfds, &ofds); return r; } fair-0.5.3/src/fd.h0000664167275116727510000000327311666127070010767 00000000000000/****************************************************************************** fd.h -- UNIX file descriptor bookkeeping and handling Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: fd.h 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/fd.h $ ******************************************************************************/ #ifndef FD_H #define FD_H #include #include #include "fair.h" #include "chrono.h" typedef enum { FD_EVENT_READ, FD_EVENT_WRITE, FD_EVENT_OOB } fd_event_t; struct fd; typedef void (*fd_hook_t)(struct fd *, fd_event_t); typedef struct fd { avl_node_t node; int fd; fd_hook_t rfunc; fd_hook_t wfunc; fd_hook_t ofunc; void *rdata; void *wdata; void *odata; } fd_t; extern unsigned int fd_count(void); extern fd_t *fd_new(int); extern void fd_delete(fd_t *); extern void fd_close(fd_t *); extern fd_t *fd_byfd(int); extern void fd_read(fd_t *, fd_hook_t, void *); extern void fd_write(fd_t *, fd_hook_t, void *); extern void fd_oob(fd_t *, fd_hook_t, void *); extern int fd_select(stamp_t); #endif fair-0.5.3/src/fdcopy.c0000664167275116727510000001054711666127070011657 00000000000000/****************************************************************************** fdcopy.c -- ringbuffer copying routines Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: fdcopy.c 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/fdcopy.c $ ******************************************************************************/ #include #include #include #include #include #include #include #include #include #include "fair.h" #include "chrono.h" #include "error.h" #include "fd.h" #include "conf.h" #include "fdcopy.h" static int ptrcmp(byte *a, byte *b) { assert(a && b); return a - b; } static avl_tree_t fdcopys = {NULL, NULL, NULL, (avl_compare_t)ptrcmp, NULL}; unsigned int fdcopy_count(void) { return avl_count(&fdcopys); } static void fdcopy_write(fd_t *, fd_event_t); static void fdcopy_read(fd_t *fd, fd_event_t evt) { fdcopy_t *fdc; size_t offset, fill, size; size_t end, len; struct iovec vec[2]; ssize_t r; unless(fd) return; fdc = fd->rdata; unless(fdc) return; unless(fdc->func) return; unless(fdc->src) return; unless(fdc->dst) return; offset = fdc->offset; fill = fdc->fill; size = fdc->size; end = offset + fill; len = size - fill; assert(len >= 0); assert(size >= 0); assert(end <= size); if(!offset) { r = read(fd->fd, fdc->buf + end, len); } else if(end >= fdc->size) { r = read(fd->fd, fdc->buf + end - size, len); } else { vec[0].iov_base = fdc->buf + end; vec[0].iov_len = size - end; vec[1].iov_base = fdc->buf; vec[1].iov_len = offset; r = readv(fd->fd, vec, 2); } if(r > 0) { fdc->fill = fill += r; fd_write(fdc->dst, fdcopy_write, fdc); if(size - fill < conf_MinBurst) fd_read(fdc->src, NULL, NULL); } else { if(fill) fd_write(fdc->dst, fdcopy_write, fdc); else fdc->dst = NULL; fd_read(fdc->src, NULL, NULL); fdc->src = NULL; } fdc->func(fdc, FDCOPY_EVENT_READ, r); if(fdc->dst) return; fdc->func(fdc, FDCOPY_EVENT_DONE, fill); } static void fdcopy_write(fd_t *fd, fd_event_t evt) { fdcopy_t *fdc; size_t offset, fill, size; struct iovec vec[2]; ssize_t r; unless(fd) return; fdc = fd->wdata; unless(fdc) return; unless(fdc->func) return; unless(fdc->dst) return; offset = fdc->offset; fill = fdc->fill; size = fdc->size; if(offset + fill <= size) { r = write(fd->fd, fdc->buf + offset, fill); } else { vec[0].iov_base = fdc->buf + offset; vec[0].iov_len = size - offset; vec[1].iov_base = fdc->buf; vec[1].iov_len = fill - size + offset; r = writev(fd->fd, vec, 2); } if(r > 0) { fdc->fill = fill -= r; if(fill) { offset += r; if(offset > size) offset -= size; } else { offset = 0; fd_write(fdc->dst, NULL, NULL); } fdc->offset = offset; if(fdc->src) { if(size - fill >= conf_MinBurst) fd_read(fdc->src, fdcopy_read, fdc); } else if(!fill) { fd_write(fdc->dst, NULL, NULL); fdc->dst = NULL; } } else { fd_write(fdc->dst, NULL, NULL); fdc->dst = NULL; } fdc->func(fdc, FDCOPY_EVENT_WRITE, r); if(fdc->dst) return; if(fdc->src) { fd_read(fdc->src, NULL, NULL); fdc->src = NULL; } fdc->func(fdc, FDCOPY_EVENT_DONE, fill); } fdcopy_t *fdcopy_new(fd_t *src, fd_t *dst, fdcopy_hook_t func, void *data) { fdcopy_t *r; unless(src) return errno = EINVAL, NULL; unless(dst) return errno = EINVAL, NULL; r = xalloc(sizeof *r + conf_MaxBurst); avl_init_node(&r->node, r); avl_insert_node(&fdcopys, &r->node); r->src = src; r->dst = dst; r->size = conf_MaxBurst; r->fill = r->offset = 0; r->func = func; r->data = data; fd_read(src, fdcopy_read, r); return r; } void fdcopy_delete(fdcopy_t *victim) { unless(victim) return; avl_unlink_node(&fdcopys, &victim->node); free(victim); } fair-0.5.3/src/fdcopy.h0000664167275116727510000000314411666127070011657 00000000000000/****************************************************************************** fdcopy.h -- ringbuffer copying routines Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: fdcopy.h 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/fdcopy.h $ ******************************************************************************/ #ifndef FDCOPY_H #define FDCOPY_H #include #include #include "fd.h" typedef enum { FDCOPY_EVENT_READ, FDCOPY_EVENT_WRITE, FDCOPY_EVENT_DONE } fdcopy_event_t; struct fdcopy; typedef void (*fdcopy_hook_t)(struct fdcopy *, fdcopy_event_t, int); typedef struct fdcopy { avl_node_t node; fd_t *src, *dst; size_t size, fill, offset; fdcopy_hook_t func; void *data; byte buf[1]; } fdcopy_t; extern unsigned int fdcopy_count(void); extern size_t fdcopy_bufsize(size_t); extern size_t fdcopy_minsize(size_t); extern fdcopy_t *fdcopy_new(fd_t *, fd_t *, fdcopy_hook_t, void *); extern void fdcopy_delete(fdcopy_t *); #endif fair-0.5.3/src/relay.c0000664167275116727510000001405111666127070011501 00000000000000/****************************************************************************** relay.c -- relayed connections Copyright (C) 2004 Wessel Dankers Copyright (C) 2011 Frank Doepper This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: relay.c 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/relay.c $ ******************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include "fair.h" #include "error.h" #include "sock.h" #include "conn.h" #include "chrono.h" #include "fdcopy.h" #include "worker.h" #include "address.h" #include "init.h" #include "conf.h" typedef struct relay { unsigned long long int id; fd_t *src, *dst; fdcopy_t *from, *to; address_t *addr; chrono_t *cr; connector_t *cn; size_t attempts; address_string_t str_from; address_string_t str_to; } relay_t; static const relay_t relay_0 = {0}; unsigned int relay_count = 0; static unsigned long long int relay_seq = 0; static void relay_trail(chrono_t *cr) { address_t *addr; unless(cr) return; addr = cr->data; chrono_delete(cr); unless(addr) return; address_unload(addr); } static void relay_delete_immediately(relay_t *rl) { unless(rl) return; if(rl->from) fdcopy_delete(rl->from); if(rl->to) fdcopy_delete(rl->to); if(rl->src) fd_close(rl->src); if(rl->dst) fd_close(rl->dst); if(rl->cr) chrono_delete(rl->cr); if(rl->cn) connector_delete(rl->cn); if(rl->addr) address_unload(rl->addr); if(conf_Debug) memset(rl, 'A', sizeof *rl); free(rl); relay_count--; } static void relay_delete(relay_t *rl) { unless(rl) return; if(rl->cr && rl->addr) { rl->cr->func = relay_trail; rl->cr->data = rl->addr; chrono_after(rl->cr, conf_TrailPeriod); rl->cr = NULL; rl->addr = NULL; } return relay_delete_immediately(rl); } static void relay_throughput_to(fdcopy_t *fdc, fdcopy_event_t evt, int len) { relay_t *rl; assert(fdc); rl = fdc->data; assert(rl); assert(rl->cr); if(evt == FDCOPY_EVENT_DONE) { if(!rl->from) return relay_delete(rl); assert(rl->src); shutdown(rl->src->fd, SHUT_WR); assert(rl->dst); shutdown(rl->dst->fd, SHUT_RD); assert(rl->to); fdcopy_delete(rl->to); rl->to = NULL; } chrono_after(rl->cr, conf_IdleTimeout); } static void relay_throughput_from(fdcopy_t *fdc, fdcopy_event_t evt, int len) { relay_t *rl; assert(fdc); rl = fdc->data; assert(rl); assert(rl->cr); if(evt == FDCOPY_EVENT_DONE) { if(!rl->to) return relay_delete(rl); assert(rl->dst); shutdown(rl->dst->fd, SHUT_WR); assert(rl->src); shutdown(rl->src->fd, SHUT_RD); assert(rl->from); fdcopy_delete(rl->from); rl->from = NULL; } chrono_after(rl->cr, conf_IdleTimeout); } static void relay_outgoing_tcp(connector_t *cn, fd_t *fd); static bool relay_connect(relay_t *rl) { address_t *addr; unless(rl) return FALSE; if(rl->attempts--) { addr = worker_bestaddress(); if(addr) { address_string(&rl->str_to, addr); if(conf_Debug) syslog(LOG_INFO, "%lld Connecting to %s %s", rl->id, rl->str_to.host, rl->str_to.serv); address_load(rl->addr = addr); chrono_after(rl->cr, conf_ConnectTimeout); if(rl->cn) connector_delete(rl->cn); rl->cn = connector_new(addr, relay_outgoing_tcp, rl); if(rl->cn) return TRUE; else syslog(LOG_ERR, "%lld Setting up connection failed: %m", rl->id); } else { syslog(LOG_ERR, "%lld No available workers; dropping connection", rl->id); } } else { syslog(LOG_ERR, "%lld No attempts left; dropping connection", rl->id); } relay_delete(rl); return FALSE; } static void relay_timeout(chrono_t *cr) { relay_t *rl; unless(cr) return; rl = cr->data; unless(rl) return; if(rl->cn) { errno = ETIMEDOUT; relay_outgoing_tcp(rl->cn, NULL); } else { syslog(LOG_WARNING, "%lld Closing idle connection from %s %s to %s %s", rl->id, rl->str_from.host, rl->str_from.serv, rl->str_to.host, rl->str_to.serv); relay_delete(rl); } } static void relay_outgoing_tcp(connector_t *cn, fd_t *fd) { relay_t *rl; address_t *addr; unless(cn) return; rl = cn->data; unless(rl) return; if(rl->cn) connector_delete(rl->cn); rl->cn = NULL; if(fd) { rl->dst = fd; rl->from = fdcopy_new(rl->src, fd, relay_throughput_from, rl); assert(rl->from); rl->to = fdcopy_new(fd, rl->src, relay_throughput_to, rl); assert(rl->to); address_string(&rl->str_to, rl->addr); syslog(LOG_INFO, "%lld Connection from %s %s put through to %s %s", rl->id, rl->str_from.host, rl->str_from.serv, rl->str_to.host, rl->str_to.serv); address_working(rl->addr); chrono_after(rl->cr, conf_IdleTimeout); } else { addr = rl->addr; if(addr) { rl->addr = NULL; syslog(LOG_ERR, "%lld connect(): %m while connecting to %s %s", rl->id, rl->str_to.host, rl->str_to.serv); address_broken(addr); address_unload(addr); } relay_connect(rl); } } relay_t *relay_new(int fd, const struct sockaddr *sa, socklen_t sa_len) { relay_t *rl; relay_count++; rl = xalloc(sizeof *rl); *rl = relay_0; rl->id = relay_seq++; address_string_sa(&rl->str_from, sa, sa_len); syslog(LOG_INFO, "%llu Connection from %s %s", rl->id, rl->str_from.host, rl->str_from.serv); rl->attempts = conf_ConnectAttempts; rl->cr = chrono_new(relay_timeout, rl); assert(rl->cr); rl->src = fd_new(fd); assert(rl->src); relay_connect(rl); return rl; } fair-0.5.3/src/relay.h0000664167275116727510000000305011666127070011503 00000000000000/****************************************************************************** relay.h -- relayed connections Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: relay.h 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/relay.h $ ******************************************************************************/ #ifndef _FAIR_RELAY_H #define _FAIR_RELAY_H #include #include #include "fair.h" #include "fd.h" #include "conn.h" #include "address.h" #include "fdcopy.h" #include "chrono.h" typedef struct relay { unsigned long long int id; fd_t *src, *dst; fdcopy_t *from, *to; address_t *addr; chrono_t *cr; connector_t *cn; size_t attempts; address_string_t str_from; address_string_t str_to; } relay_t; extern unsigned int relay_count; extern relay_t *relay_new(int, const struct sockaddr *, socklen_t); #endif fair-0.5.3/src/sock.c0000664167275116727510000001102511666127070011322 00000000000000/****************************************************************************** sock.c -- create and handle listening network sockets Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: sock.c 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/sock.c $ ******************************************************************************/ #include #include #include #include #include #include #include #include #include "fair.h" #include "sock.h" #include "error.h" #include "conf.h" #include "fd.h" #include "sock.h" static int ptrcmp(byte *a, byte *b) { return a - b; } static avl_tree_t listeners = {NULL, NULL, NULL, (avl_compare_t)ptrcmp, NULL}; unsigned int listener_count(void) { return avl_count(&listeners); } void listener_delete(listener_t *lst) { unless(lst) return; avl_free_nodes(&lst->fds); avl_unlink_node(&listeners, &lst->node); free(lst); } static listener_t *listener_new(accept_hook_t func, void *data) { listener_t *lst; lst = xalloc(sizeof *lst); avl_init_node(&lst->node, lst); avl_init_tree(&lst->fds, (avl_compare_t)ptrcmp, (avl_freeitem_t)fd_close); lst->func = func; lst->data = data; avl_insert_node(&listeners, &lst->node); return lst; } static void sock_accept_tcp(fd_t *fd, fd_event_t evt) { int stream; struct sockaddr_storage sa; socklen_t sa_len = sizeof sa; listener_t *lst; if(evt != FD_EVENT_READ) return; assert(fd); lst = fd->rdata; memset(&sa, 0, sizeof sa); stream = accept(fd->fd, (struct sockaddr *)&sa, &sa_len); if(stream == -1) { if(errno == EINTR) return; syslog(LOG_ERR, "accept(%d): %m", fd->fd); } else { lst->func(lst->data, stream, (struct sockaddr *)&sa, sa_len); } } const char *listener_new_tcp(const char *port, accept_hook_t func, void *data) { int fd, err, backlog; const int on = 1; struct addrinfo hints = {0}, *ais = NULL, *ai; const char *res = NULL; listener_t *lst; fd_t *nfd; unless(port) return "Bad port parameter"; hints.ai_family = PF_UNSPEC; hints.ai_socktype = SOCK_STREAM; if(!conf_LocalTCP) hints.ai_flags = AI_PASSIVE; err = getaddrinfo(NULL, port, &hints, &ais); if(err) return gai_strerror(err) ?: "unknown error"; if(!ais) return "No addresses for host"; backlog = SOMAXCONN; if(backlog < 5) backlog = 5; lst = listener_new(func, data); assert(lst); for(ai = ais; ai; ai = ai->ai_next) { fd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); if(fd == -1) { res = gai_strerror(errno); } else { setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof on); if(bind(fd, ai->ai_addr, ai->ai_addrlen) || listen(fd, backlog)) { res = strerror(errno); } else { nfd = fd_new(fd); assert(nfd); fd_read(nfd, sock_accept_tcp, lst); avl_insert(&lst->fds, nfd); continue; } if(close(fd) == -1) syslog(LOG_ERR, "close(): %m"); } } if(!avl_count(&lst->fds)) return listener_delete(lst), res; return NULL; } const char *listener_new_udp(const char *port, fd_hook_t func, void *data) { int fd, err; const int on = 1; struct addrinfo hints = {0}, *ais = NULL, *ai; const char *res = NULL; unsigned int gelukt = 0; fd_t *nfd; unless(port) return "Bad port parameter"; hints.ai_family = PF_UNSPEC; hints.ai_socktype = SOCK_DGRAM; hints.ai_flags = AI_PASSIVE; err = getaddrinfo(NULL, port, &hints, &ais); if(err) return gai_strerror(err) ?: "kansloos"; for(ai = ais; ai; ai = ai->ai_next) { fd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); if(fd == -1) { res = gai_strerror(errno); } else { setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof on); if(bind(fd, ai->ai_addr, ai->ai_addrlen)) { res = strerror(errno); } else { nfd = fd_new(fd); assert(nfd); fd_read(nfd, func, data); gelukt++; continue; } if(close(fd) == -1) syslog(LOG_CRIT, "close(): %m"); } } return gelukt ? NULL : res; } fair-0.5.3/src/sock.h0000664167275116727510000000274611666127070011341 00000000000000/****************************************************************************** sock.h -- create and handle listening network sockets Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: sock.h 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/sock.h $ ******************************************************************************/ #ifndef SOCK_H #define SOCK_H #include #include #include "fd.h" typedef void (*accept_hook_t)(void *, int, const struct sockaddr *, socklen_t); typedef struct listener { avl_node_t node; avl_tree_t fds; accept_hook_t func; void *data; } listener_t; extern unsigned int listener_count(void); extern const char *listener_new_tcp(const char *, accept_hook_t, void *); extern const char *listener_new_udp(const char *, fd_hook_t, void *); extern void listener_delete(listener_t *); #endif fair-0.5.3/src/worker.c0000664167275116727510000001530711666127070011703 00000000000000/****************************************************************************** worker.c -- bookkeeping for known transponder nodes Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: worker.c 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/worker.c $ ******************************************************************************/ #include #include #include #include #include #include #include #include #include #include "fair.h" #include "error.h" #include "conf.h" #include "address.h" #include "avlr.h" #include "worker.h" #define PRIO_MAX (~UINT32_C(0)) static worker_t worker_0 = {{0}}; static worker_t *worker_last = NULL; static u32 worker_prio(const worker_t *wrk) { u32 capacity, nconn; unless(wrk) return PRIO_MAX; capacity = wrk->capacity; if(capacity) { nconn = wrk->nconn; if(nconn > UINT16_MAX) nconn = UINT16_MAX; nconn += wrk->hysteresis; if(nconn > UINT16_MAX) nconn = UINT16_MAX; return (nconn << 16) / capacity; } return PRIO_MAX; } static int worker_cmp_name(const worker_t *aw, const worker_t *bw) { assert(aw && bw); return strcasecmp(aw->name, bw->name); } static int worker_cmp_best(const worker_t *aw, const worker_t *bw) { avl_node_t *n; bool ab, bb; u32 ar, br; address_t *aa, *ba; #if 0 int ac, bc; sa_family_t af, bf; #endif assert(aw && bw); /* an worker with no addresses always loses from a worker that ** does have addresses */ n = aw->prio.head; if(n) { aa = n->item; n = bw->prio.head; if(!n) return -1; ba = n->item; } else { if(bw->prio.head) return 1; aa = ba = NULL; } /* at this point either both or neither of aa and ba are set */ if(aa && ba) { ab = aa->disabled; bb = ba->disabled; if(!ab && bb) return -1; if(ab && !bb) return 1; ab = aa->dead; bb = ba->dead; if(!ab && bb) return -1; if(ab && !bb) return 1; } ar = worker_prio(aw); br = worker_prio(bw); if(ar < br) return -1; if(ar > br) return 1; if(aa && ba) { ar = aa->errors; br = ba->errors; if(ar < br) return -1; if(ar > br) return 1; } #if 0 /* if both have equal load, start with the strongest */ ac = aw->capacity; bc = bw->capacity; if(ac > bc) return -1; if(ac < bc) return 1; /* slight preference for newer address families */ if(aa && ba) { af = address_sa(aa)->sa_family; bf = address_sa(ba)->sa_family; if(af > bf) return -1; if(af < bf) return 1; } if(aw > bw) return -1; if(aw < bw) return 1; #endif return 0; } static avl_tree_t workers_name = {NULL, NULL, NULL, (avl_compare_t)worker_cmp_name, NULL}; static avl_tree_t workers_best = {NULL, NULL, NULL, (avl_compare_t)worker_cmp_best, NULL}; unsigned int worker_count(void) { return avl_count(&workers_name); } static void worker_changed(worker_t *wrk) { unless(wrk) return; avl_unlink_node(&workers_best, &wrk->best); avl_insert_right(&workers_best, &wrk->best); } static void address_changed(address_t *addr, address_event_t evt) { worker_t *wrk; unless(addr) return; wrk = addr->data; unless(wrk) return; avl_unlink_node(&wrk->prio, &addr->prio); avl_insert_right(&wrk->prio, &addr->prio); if(evt == ADDRESS_EVENT_LOAD) { wrk->nconn++; wrk->hysteresis = 0; worker_changed(wrk); /* can't change two workers at the same time */ if(wrk != worker_last) { if(worker_last) { worker_last->hysteresis = conf_Hysteresis; worker_changed(worker_last); } worker_last = wrk; } } else if(evt == ADDRESS_EVENT_UNLOAD) { wrk->nconn--; worker_changed(wrk); } } worker_t *worker_new(const char *name) { worker_t *wrk; size_t len; assert(name); len = strlen(name); wrk = xalloc(sizeof *wrk + len); *wrk = worker_0; strcpy(wrk->name, name); wrk->hysteresis = conf_Hysteresis; avl_init_node(&wrk->node, wrk); avl_init_node(&wrk->best, wrk); avl_init_tree(&wrk->addr, (avl_compare_t)address_cmp_addr, NULL); avl_init_tree(&wrk->prio, (avl_compare_t)address_cmp_prio, NULL); avl_insert_node(&workers_name, &wrk->node); avl_insert_right(&workers_best, &wrk->best); syslog(LOG_INFO, "Added new worker node %s", name); return wrk; } worker_t *worker_byname(const char *name) { avl_node_t *n; worker_t *wrk; size_t len; unless(name) return NULL; len = strlen(name); wrk = alloca(sizeof *wrk + len); unless(wrk) return NULL; *wrk = worker_0; strcpy(wrk->name, name); n = avl_search(&workers_name, wrk); return n ? n->item : NULL; } void worker_update(worker_t *wrk, int capacity, const struct sockaddr *sa, socklen_t len) { address_t *addr; address_string_t str; int oldcapacity; unless(wrk) return; oldcapacity = wrk->capacity; addr = address_byaddr(&wrk->addr, sa, len); if(addr) { wrk->capacity = capacity; address_update(addr); if(oldcapacity != capacity) worker_changed(wrk); } else if(address_authorized(sa, len)) { wrk->capacity = capacity; addr = address_new(sa, len, address_changed, wrk); assert(addr); avl_insert_node(&wrk->addr, &addr->node); avl_insert_right(&wrk->prio, &addr->prio); address_string_sa(&str, sa, len); syslog(LOG_INFO, "Added new worker address %s %s to %s", str.host, str.serv, wrk->name); worker_changed(wrk); } } static void worker_print(const worker_t *wrk, const address_t *best) { avl_node_t *n; address_t *addr; unless(wrk) return; eprintf("\r%s: capacity:%d conn:%d score:%llu\033[K\n", wrk->name, (int)wrk->capacity, (int)wrk->nconn, (unsigned long long)worker_prio(wrk)); for(n = wrk->addr.head; n; n = n->next) { addr = n->item; assert(addr); eprintf("%s\tconn:%d errors:%d dead:%d disabled:%d %s %s\n", addr == best ? " *" : "", (int)addr->nconn, (int)addr->errors, (int)addr->dead, (int)addr->disabled, addr->str.host, addr->str.serv); } } address_t *worker_bestaddress(void) { avl_node_t *n; worker_t *wrk; address_t *addr; n = workers_best.head; if(!n) return NULL; wrk = n->item; unless(wrk) return NULL; n = wrk->prio.head; if(!n) return NULL; addr = n->item; if(conf_Debug) for(n = workers_best.head; n; n = n->next) worker_print(n->item, addr); return addr; } fair-0.5.3/src/worker.h0000664167275116727510000000330111666127070011677 00000000000000/****************************************************************************** worker.h -- bookkeeping for known transponder nodes Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: worker.h 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/worker.h $ ******************************************************************************/ #ifndef WORKER_H #define WORKER_H #include #include #include #include "address.h" typedef struct worker { /* for adding it to workers_name */ avl_node_t node; /* for adding it to workers_best */ avl_node_t best; /* contains address_t * nodes, sorted by name */ avl_tree_t addr; /* contains address_t * nodes, sorted by priority */ avl_tree_t prio; int hysteresis; int capacity; u16 nconn; char name[1]; } worker_t; extern worker_t *worker_new(const char *); extern worker_t *worker_byname(const char *); extern void worker_update(worker_t *, int, const struct sockaddr *, socklen_t); extern struct address *worker_bestaddress(void); extern unsigned int worker_count(void); #endif fair-0.5.3/src/transponder.c0000664167275116727510000001674711666127070012742 00000000000000/****************************************************************************** transponder.c -- main transponder (load advertisement) program Copyright (C) 2004 Wessel Dankers This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . $Id: transponder.c 223 2011-12-02 10:53:44Z wsl $ $URL: https://svn.fair.uvt.nl/branches/0.5/src/transponder.c $ ******************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include "init.h" #include "conf.h" #include "chrono.h" #include "error.h" #include "protocol.h" #include "fair.h" #ifndef HOST_NAME_MAX #define HOST_NAME_MAX 255 #endif typedef struct source { avl_node_t node; int fd; } source_t; static source_t source_0 = {{0}}; static int sourcecmp(const source_t *a, const source_t *b) { assert(a && b); return a->fd - b->fd; } static avl_tree_t sources = {NULL, NULL, NULL, (avl_compare_t)sourcecmp, NULL}; typedef struct adres { avl_node_t node; source_t *last; socklen_t len; } adres_t; static adres_t adres_0 = {{0}}; static int adrescmp(adres_t *a, adres_t *b) { socklen_t alen, blen; assert(a && b); alen = a->len; blen = b->len; return memcmp(a+1, b+1, alen < blen ? alen : blen) ?: alen - blen; } static avl_tree_t adressen = {NULL, NULL, NULL, (avl_compare_t)adrescmp, NULL}; const char *listener_new_udp(const char *port) { int fd, err; const int on = 1; struct addrinfo hints = {0}, *ais = NULL, *ai; const char *res = NULL; source_t *src; int gelukt = 0; unless(port) return "internal error"; hints.ai_family = PF_UNSPEC; hints.ai_socktype = SOCK_DGRAM; hints.ai_flags = AI_PASSIVE; err = getaddrinfo(NULL, port, &hints, &ais); if(err) return gai_strerror(err) ?: "unknown error"; for(ai = ais; ai; ai = ai->ai_next) { fd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); if(fd == -1) { res = gai_strerror(errno) ?: "unknown error"; } else { setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof on); if(bind(fd, ai->ai_addr, ai->ai_addrlen)) { res = strerror(errno) ?: "unknown error"; } else { src = xalloc(sizeof *src); *src = source_0; src->fd = fd; avl_init_node(&src->node, src); avl_insert_node(&sources, &src->node); gelukt++; continue; } if(close(fd) == -1) syslog(LOG_ERR, "close(): %m"); } } return gelukt ? NULL : res; } static void adres_new(const char *adres, const char *poort) { int err; struct addrinfo hints, *ai = NULL, *aip; adres_t *ad; unless(adres) return; unless(poort) return; memset(&hints, 0, sizeof hints); hints.ai_family = AF_UNSPEC; hints.ai_protocol = PROTO_UNSPEC; hints.ai_flags = 0; hints.ai_socktype = SOCK_DGRAM; err = getaddrinfo(adres, poort, &hints, &ai); if(err) syslog_exit(LOG_CRIT, "getaddrinfo(%s, %s): %s. Program exit.", adres, poort, gai_strerror(err)); if(!ai) syslog_exit(LOG_CRIT, "getaddrinfo(%s, %s): no addresses found. Program exit.", adres, poort); for(aip = ai; aip; aip = aip->ai_next) { ad = xalloc(sizeof *ad + aip->ai_addrlen); *ad = adres_0; memcpy(ad+1, aip->ai_addr, ad->len = aip->ai_addrlen); avl_init_node(&ad->node, ad); avl_insert_node(&adressen, &ad->node); } freeaddrinfo(ai); } static loadping_t *msg = NULL; static size_t msglen = 0; static double max_capacity = 100.0; static bool spam(struct sockaddr *sa, socklen_t salen, int fd) { assert(msg); assert(sa); return sendto(fd, msg, msglen, MSG_DONTWAIT|MSG_NOSIGNAL, sa, salen) != msglen; } static void spamall(bool thorough, stamp_t delay) { avl_node_t *n, *s; adres_t *ad; source_t *src; int count = 0; for(n = adressen.head; n; n = n->next) { ad = n->item; assert(ad); count += ad->last || thorough; } if(!count) return (void)usleep(delay); for(n = adressen.head; n; n = n->next) { ad = n->item; assert(ad); if(ad->last) { if(spam((struct sockaddr *)(ad+1), ad->len, ad->last->fd)) ad->last = NULL; } else if(thorough) { for(s = sources.head; s; s = s->next) { src = s->item; assert(src); if(!spam((struct sockaddr *)(ad+1), ad->len, src->fd)) { ad->last = src; break; } } } usleep(delay/count); } } /* FIXME: use _slightly_ more efficient version below only if available; ** getloadavg() otherwise. Thanks to guus for the suggestion. */ static int procfd = -1; static void readload(void) { char buf[1024]; ssize_t r; double l15, l5, l1; unless(msg) return; unless(procfd != -1) return; r = lseek(procfd, 0, SEEK_SET); if(r == -1) return; r = read(procfd, buf, sizeof buf - 1); if(r <= 0) return; buf[r] = '\0'; if(sscanf(buf, "%lf %lf %lf ", &l1, &l5, &l15) != 3) return; msg->capacity = htons(max_capacity / exp(l1)); } int main(int argc, char **argv) { const char *err; char *hostname; char *config = NULL; int i, opt; while((opt = getopt(argc, argv, "c:")) != EOF) { switch(opt) { case 'c': config = strdup(optarg); break; default: syslog_exit(LOG_CRIT, "Unknown option. Program exit."); break; } } if(optind >= argc) syslog_exit(LOG_CRIT, "Usage: %s [-c config] host [host ...]. Program exit.", argv[0]); if(sizeof *msg != PROTOCOL_SIZE) syslog_exit(LOG_CRIT, "Internal program error. Program exit."); if(!init_signals()) syslog_exit(LOG_CRIT, "sigaction(): %m. Program exit."); if(!conf_load(config, FALSE)) syslog_exit(LOG_CRIT, "Error reading config file. Program exit."); max_capacity = conf_MaxCapacity; msg = xalloc(sizeof *msg + HOST_NAME_MAX + 1); hostname = (char *)(msg + 1); if(gethostname(hostname, HOST_NAME_MAX + 1)) syslog_exit(LOG_CRIT, "gethostname(): %m. Program exit."); msg->version = PROTOCOL_VERSION; msg->capacity = htons(0); /* capacity minus current load */ msg->hostlen = strlen(hostname); msglen = sizeof *msg + msg->hostlen; procfd = open("/proc/loadavg", O_RDONLY); if(procfd == -1) syslog_exit(LOG_CRIT, "open(/proc/loadavg): %m. Program exit."); assert(conf_WorkerService); err = listener_new_udp(conf_WorkerService); if(err) syslog_exit(LOG_CRIT, "Error listening on UDP port %s: %s", conf_WorkerService, err); assert(conf_TransponderService); for(i = optind; i < argc; i++) adres_new(argv[i], conf_TransponderService); if(!conf_Debug && !init_daemon()) syslog_exit(LOG_CRIT, "daemon(): %m. Program exit."); if(conf_DropPrivs && !init_privs()) syslog_exit(LOG_CRIT, "dropprivs(): %m. 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Backends register themselves using the .Xr transponder 8 program. .Sh OPTIONS .Bl -tag -width indent .It Fl c Ar config Read configuration from .Ar config instead of the default configuration file. .El .Sh SEE ALSO .Xr carrousel 8 , .Xr fair.conf 5 , .Xr fair 7 fair-0.5.3/doc/fair.70000664167275116727510000000312010247114255011176 00000000000000.Dd 2005-05-25 .Dt fair 7 .Os "Debian GNU/Linux" .\" $Id: fair.7 96 2005-05-31 17:02:37Z wsl $ .\" $URL: https://svn.fair.uvt.nl/branches/0.5/doc/fair.7 $ .Sh NAME .Nm fair .Nd simple TCP load balancing service .Sh DESCRIPTION .Nm is a load balancer for TCP connections. It can be used to distribute incoming connections for SMTP, HTTP or any other TCP service to multiple hosts, distributing the load as evenly as possible. .Pp .Nm consists of two daemons. The .Nm carrousel is the front-end; it keeps track of back-end hosts and their status, and forwards incoming connections to the back-ends in such a way that the load is distributed fairly. The .Nm transponder runs on the back-end hosts, it registers with the carrousel and sends it status information. The TCP connections forwarded by the .Nm carrousel are not sent to the .Nm transponder daemons but are sent directly to the desired service running on the back-end host. Both daemons share a single configuration file. .Sh EXAMPLES The following example shows how to set up .Nm to service HTTP connections and to distribute them over back-ends in the 192.168.1.0/24 subnet. .Pp The configuration file .Pa /etc/fair.conf contains the following: .Bd -literal -offset indent WorkerService = http BalancerService = http AllowUDP = ^192\.168\.1\.[0-9]+$ .Ed .Pp On .Pa www.example.com , the front-end server receiving the incoming HTTP connections, just run: .Bd -literal -offset indent carrousel .Ed .Pp On each of the back-ends run: .Bd -literal -offset indent transponder www.example.com .Ed .Sh SEE ALSO .Xr carrousel 8 , .Xr transponder 8 , .Xr fair.conf 5 fair-0.5.3/doc/fair.conf.50000664167275116727510000000707510274345671012145 00000000000000.Dd 2005-01-27 .Dt fair.conf 5 .Os "Debian GNU/Linux" .\" $Id: fair.conf.5 153 2005-08-04 08:03:05Z wsl $ .\" $URL: https://svn.fair.uvt.nl/branches/0.5/doc/fair.conf.5 $ .Sh NAME .Nm fair.conf .Nd configuration file for the carrousel and transponder daemons .Sh DESCRIPTION .Bl -tag -width indent .It Va Debug No (bool, false) Runs the program in debug mode: it will not detach, it will print status updates very frequently, it will print extra diagnostic messages to stderr. .It Va DropPrivs No (bool, true) The program will switch to a different uid/gid after obtaining root-only resources. See also the UserID and GroupID variables. .It Va WorkerService No (string, smtp) * This is the service on which the worker nodes offer the service that is being balanced. Typically this is the service of another daemon, e.g. Postfix. The transponder daemon also uses this as the datagram source service for its status updates. .It Va BalancerService No (string, smtp) * The stream service on which the carrousel daemon listens for incoming connections. These connections will be put through to one of the worker nodes. .It Va TransponderService No (string, rlp) * The carrousel daemon listens on this service for status update datagrams from the transponders. See also the AllowUDP variable. .It Va PingInterval No (time, 0.1 seconds) How often the transponder sends an update to each carrousel. So, if two carrousels are configured and the interval is 0.1 seconds, that transponder sends 20 packets every second. .It Va PingTimeout No (time, 0.5 seconds) After this period has elapsed without receiving any status update packets from the transponder, this host is considered dead. .It Va IdleTimeout No (time, 600.0 seconds) The connection is terminated if neither party has sent something for this many seconds. For SMTP connections this would have to be at least 600.0 seconds, see RFC 2821 section 4.5.3.2. .It Va ConnectTimeout No (time, 1.0 seconds) When connecting to a worker node, abort after this many seconds have elapsed and no connection is established. .It Va ConnectAttempts No (integer, 3) When putting through a connection fails, the carrousel will attempt to contact other worker nodes. It will give up after this many tries. .It Va BenchPeriod No (time, 5.0 seconds) If a connection to a worker node fails it is excluded from new connections for this many seconds. .It Va TrailPeriod No (time, 60.0 seconds) When a connection is finished, pretend it lasted this many seconds more for load calculation purposes. .It Va Hysteresis No (integer, 0) Add an advantage to the last used worker node so that it gets selected in preference of others. .It Va MaxCapacity No (integer, 100) When sending update packets, the capacity of the worker node measured in terms of concurrent connections. This number is adjusted for the current load average before sending it to the carrousel nodes. .It Va MaxBurst No (integer, 65536) Ringbuffer size for load balancer nodes. .It Va MinBurst No (integer, 1450) If fewer than this many bytes are available in the ring buffer, do not read anything but try to free up space first. .It Va LocalTCP No (bool, yes) Only allow connections over the loopback interface. If this option is set to "no", connections will be accepted on any interface and on any address. .It Va AllowUDP No (extended regexp, ^) Only datagram status packets that match this extended regular expression are accepted. All other datagram packets are logged and silently dropped. Once UDP packets are accepted from a certain source, they are never matched against this regexp again. .El .Sh SEE ALSO .Xr carrousel 8 , .Xr transponder 8 fair-0.5.3/doc/transponder.80000664167275116727510000000155410247114255012626 00000000000000.Dd 2005-05-25 .Dt transponder 8 .Os "Debian GNU/Linux" .\" $Id: transponder.8 96 2005-05-31 17:02:37Z wsl $ .\" $URL: https://svn.fair.uvt.nl/branches/0.5/doc/transponder.8 $ .Sh NAME .Nm transponder .Nd backend node for load balancing services .Sh SYNOPSIS .Nm .Op Fl c Ar config .Ar address .Op Ar address Li ... .Sh DESCRIPTION For each .Ar address specified, registers with the .Xr carrousel 8 program running at that address and announces willingness to serve connections. It also transmits information about the current capacity, so that connections are distributed fairly amongst backend nodes. Multiple addresses may be specified for a single host for multipath routing. .Sh OPTIONS .Bl -tag -width indent .It Fl c Ar config Read configuration from .Ar config instead of the default configuration file. .El .Sh SEE ALSO .Xr carrousel 8 , .Xr fair.conf 5 , .Xr fair 7