Add plugable logging support include sample plugin which replicates the
existing core code. Add OK hook.
* lib/Qpsmtpd.pm
(init_logger): replaced with log_level()
(load_logging): NEW - load logging plugins without calling log()
(log_level): NEW - set/get global $LogLevel scalar
(log): now just a wrapper for varlog(); called only by core code
(varlog): initializes logging if not already done, calls logging plugins
in turn and falls back to interal logging unless plugins OK or DECLINED
(_load_plugins): only display "Loading plugin" when actually loading one
(run_hooks): load logging plugins without calling log(); add OK hook as
else of the DENY* case
(spool_dir): use global $Spool_dir scalar to cache location
* lib/Qpsmtpd/Plugin.pm
(%hooks): add "logging" and "ok"
(register_hook): add local _hook to object cache
(log): call varlog() with additional parameters hook and plugin_name
except for logging hook
(compile): add accessor sub for local _hook scalar
* lib/Qpsmtpd/SMTP.pm
(mail, rcpt): change loglevel to LOGALERT instead of LOGWARN for from/to
* qpsmtpd-forkserver
(REAPER): use package ::log() instead of warn()
(main): defer calling log until $plugin_loader has been initialized
(log): call logging using the $plugin_loader object
* plugins/logging/warn
NEW: sample plugin which replicates the core logging functionality
* plugins/logging/devnull
NEW: sample plugin which logs nothing (for testing multiple logging
plugin functionality)
* config.sample/logging
sample configuration file for logging plugins
* plugins/virus/uvscan
plugins/virus/clamav
Increase loglevel for non-serious warnings to LOGWARN from LOGERROR
git-svn-id: https://svn.perl.org/qpsmtpd/trunk@398 958fd67b-6ff1-0310-b445-bb7760255be9
This commit is contained in:
John Peacock
parent
aef508cb7b
commit
e331f6b248
1
config.sample/logging
Normal file
1
config.sample/logging
Normal file
@ -0,0 +1 @@
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logging/warn 9
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124
lib/Qpsmtpd.pm
124
lib/Qpsmtpd.pm
@ -1,37 +1,85 @@
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package Qpsmtpd;
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use strict;
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use vars qw($VERSION $LogLevel);
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use vars qw($VERSION $Logger $LogLevel $Spool_dir);
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use Sys::Hostname;
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use Qpsmtpd::Constants;
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$VERSION = "0.30-dev";
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sub TRACE_LEVEL { $LogLevel }
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sub version { $VERSION };
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sub init_logger {
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sub TRACE_LEVEL { log_level(); }; # leave for plugin compatibility
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sub load_logging {
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# need to do this differently that other plugins so as to
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# not trigger logging activity
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my $self = shift;
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# Get the loglevel - we localise loglevel to zero while we do this
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my $loglevel = do {
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local $LogLevel = 0;
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$self->config("loglevel");
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};
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return if $self->{hooks}->{"logging"};
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my $configdir = $self->config_dir("logging");
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my $configfile = "$configdir/logging";
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my @loggers = $self->_config_from_file($configfile,'logging');
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my $dir = $self->plugin_dir;
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$self->_load_plugins($dir, @loggers);
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foreach my $logger (@loggers) {
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$self->log(LOGINFO, "Loaded $logger");
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}
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return @loggers;
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}
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sub log_level {
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my $self = shift;
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return $LogLevel if $LogLevel;
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my $configdir = $self->config_dir("loglevel");
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my $configfile = "$configdir/loglevel";
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my ($loglevel) = $self->_config_from_file($configfile,'loglevel');
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if (defined($loglevel) and $loglevel =~ /^\d+$/) {
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$LogLevel = $loglevel;
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}
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else {
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$LogLevel = LOGWARN; # Default if no loglevel file found.
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}
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$self->log(LOGINFO, "Loaded default logger");
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return $LogLevel;
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}
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sub log {
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my ($self, $trace, @log) = @_;
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my $level = TRACE_LEVEL();
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$level = $self->init_logger unless defined $level;
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warn join(" ", $$, @log), "\n"
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if $trace <= $level;
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$self->varlog($trace,join(" ",@log));
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}
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sub varlog {
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my ($self, $trace) = (shift,shift);
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my ($hook, $plugin, @log);
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if ( $#_ == 0 ) { # log itself
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(@log) = @_;
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}
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elsif ( $#_ == 1 ) { # plus the hook
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($hook, @log) = @_;
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}
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else { # called from plugin
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($hook, $plugin, @log) = @_;
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}
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$self->load_logging; # in case we already don't have this loaded yet
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my ($rc) = $self->run_hooks("logging", $trace, $hook, $plugin, @log);
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unless ( $rc and $rc == DECLINED or $rc == OK ) {
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# no logging plugins registered so fall back to STDERR
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warn join(" ", $$ .
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(defined $plugin ? " $plugin plugin:" :
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defined $hook ? " running plugin ($hook):" : ""),
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@log), "\n"
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if $trace <= $self->log_level();
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}
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}
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#
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@ -141,9 +189,8 @@ sub _load_plugins {
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my ($dir, @plugins) = @_;
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my @ret;
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for my $plugin (@plugins) {
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$self->log(LOGDEBUG, "Loading $plugin");
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($plugin, my @args) = split /\s+/, $plugin;
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for my $plugin_line (@plugins) {
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my ($plugin, @args) = split /\s+/, $plugin_line;
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if (lc($plugin) eq '$include') {
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my $inc = shift @args;
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@ -184,8 +231,12 @@ sub _load_plugins {
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my $package = "Qpsmtpd::Plugin::$plugin_name";
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# don't reload plugins if they are already loaded
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Qpsmtpd::Plugin->compile($plugin_name, $package, "$dir/$plugin", $self->{_test_mode}) unless
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defined &{"${package}::register"};
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unless ( defined &{"${package}::register"} ) {
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Qpsmtpd::Plugin->compile($plugin_name,
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$package, "$dir/$plugin", $self->{_test_mode});
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$self->log(LOGDEBUG, "Loading $plugin_line")
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unless $plugin_line =~ /logging/;
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}
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my $plug = $package->new();
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push @ret, $plug;
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@ -206,7 +257,12 @@ sub run_hooks {
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if ($hooks->{$hook}) {
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my @r;
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for my $code (@{$hooks->{$hook}}) {
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$self->log(LOGINFO, "running plugin ($hook):", $code->{name});
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if ( $hook eq 'logging' ) { # without calling $self->log()
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eval { (@r) = $code->{code}->($self, $self->transaction, @_); };
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$@ and warn("FATAL LOGGING PLUGIN ERROR: ", $@) and next;
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}
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else {
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$self->varlog(LOGINFO, $hook, $code->{name});
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eval { (@r) = $code->{code}->($self, $self->transaction, @_); };
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$@ and $self->log(LOGCRIT, "FATAL PLUGIN ERROR: ", $@) and next;
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@ -230,8 +286,14 @@ sub run_hooks {
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$r[0] == DENY_DISCONNECT or $r[0] == DENYSOFT_DISCONNECT)
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{
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$r[1] = "" if not defined $r[1];
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$self->log(LOGDEBUG, "Plugin $code->{name}, hook $hook returned $r[0], $r[1]");
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$self->log(LOGDEBUG, "Plugin ".$code->{name}.", hook $hook returned $r[0], $r[1]");
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$self->run_hooks("deny", $code->{name}, $r[0], $r[1]) unless ($hook eq "deny");
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} else {
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$r[1] = "" if not defined $r[1];
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$self->log(LOGDEBUG, "Plugin ".$code->{name}.", hook $hook returned $r[0], $r[1]");
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$self->run_hooks("ok", $code->{name}, $r[0], $r[1]) unless ($hook eq "ok");
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}
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}
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last unless $r[0] == DECLINED;
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@ -255,35 +317,33 @@ sub _register_hook {
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}
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}
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my $spool_dir = "";
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sub spool_dir {
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my $self = shift;
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unless ( $spool_dir ) { # first time through
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unless ( $Spool_dir ) { # first time through
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$self->log(LOGINFO, "Initializing spool_dir");
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$spool_dir = $self->config('spool_dir')
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$Spool_dir = $self->config('spool_dir')
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|| Qpsmtpd::Utils::tildeexp('~/tmp/');
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$spool_dir .= "/" unless ($spool_dir =~ m!/$!);
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$Spool_dir .= "/" unless ($Spool_dir =~ m!/$!);
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$spool_dir =~ /^(.+)$/ or die "spool_dir not configured properly";
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$spool_dir = $1; # cleanse the taint
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$Spool_dir =~ /^(.+)$/ or die "spool_dir not configured properly";
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$Spool_dir = $1; # cleanse the taint
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# Make sure the spool dir has appropriate rights
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if (-e $spool_dir) {
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my $mode = (stat($spool_dir))[2];
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if (-e $Spool_dir) {
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my $mode = (stat($Spool_dir))[2];
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$self->log(LOGWARN,
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"Permissions on spool_dir $spool_dir are not 0700")
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"Permissions on spool_dir $Spool_dir are not 0700")
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if $mode & 07077;
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}
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# And finally, create it if it doesn't already exist
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-d $spool_dir or mkdir($spool_dir, 0700)
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or die "Could not create spool_dir $spool_dir: $!";
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-d $Spool_dir or mkdir($Spool_dir, 0700)
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or die "Could not create spool_dir $Spool_dir: $!";
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}
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return $spool_dir;
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return $Spool_dir;
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}
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# For unique filenames. We write to a local tmp dir so we don't need
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@ -5,7 +5,7 @@ our %hooks = map { $_ => 1 } qw(
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config queue data data_post quit rcpt mail ehlo helo
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auth auth-plain auth-login auth-cram-md5
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connect reset_transaction unrecognized_command disconnect
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deny
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deny logging ok
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);
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sub new {
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@ -21,7 +21,7 @@ sub register_hook {
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# I can't quite decide if it's better to parse this code ref or if
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# we should pass the plugin object and method name ... hmn.
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$plugin->qp->_register_hook($hook, { code => sub { local $plugin->{_qp} = shift; $plugin->$method(@_) },
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$plugin->qp->_register_hook($hook, { code => sub { local $plugin->{_qp} = shift; local $plugin->{_hook} = $hook; $plugin->$method(@_) },
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name => $plugin->plugin_name,
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},
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$unshift,
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@ -41,7 +41,8 @@ sub qp {
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sub log {
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my $self = shift;
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$self->qp->log(shift, $self->plugin_name . " plugin: " . shift, @_);
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$self->qp->varlog(shift, $self->hook_name, $self->plugin_name, @_)
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unless defined $self->hook_name and $self->hook_name eq 'logging';
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}
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sub transaction {
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@ -124,6 +125,7 @@ sub compile {
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'@ISA = qw(Qpsmtpd::Plugin);',
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($test_mode ? 'use Test::More;' : ''),
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"sub plugin_name { qq[$plugin] }",
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"sub hook_name { return shift->{_hook}; }",
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$line,
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$sub,
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"\n", # last line comment without newline?
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@ -239,7 +239,7 @@ sub mail {
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($from) = "<" . ($from_parameter =~ m/^from:\s*(\S+)/i)[0] . ">"
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unless $from;
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$self->log(LOGWARN, "from email address : [$from]");
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$self->log(LOGALERT, "from email address : [$from]");
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if ($from eq "<>" or $from =~ m/\[undefined\]/ or $from eq "<#@[]>") {
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$from = Qpsmtpd::Address->new("<>");
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@ -290,7 +290,7 @@ sub rcpt {
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my ($rcpt) = ($_[0] =~ m/to:(.*)/i)[0];
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$rcpt = $_[1] unless $rcpt;
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$self->log(LOGWARN, "to email address : [$rcpt]");
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$self->log(LOGALERT, "to email address : [$rcpt]");
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$rcpt = (Qpsmtpd::Address->parse($rcpt))[0];
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return $self->respond(501, "could not parse recipient") unless $rcpt;
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13
plugins/logging/devnull
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13
plugins/logging/devnull
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@ -0,0 +1,13 @@
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#!/usr/bin/perl
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# this is a simple 'drop packets on the floor' plugin
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sub register {
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my $self = shift;
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$self->register_hook('logging', 'wlog');
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}
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sub wlog {
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return DECLINED;
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}
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38
plugins/logging/warn
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38
plugins/logging/warn
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@ -0,0 +1,38 @@
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#!/usr/bin/perl
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# this is a simple 'warn' plugin like the default builtin logging
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#
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# It demonstrates that a logging plugin can call ->log itself as well
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# as how to ignore log entries from itself
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sub register {
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my ($self, $qp, $loglevel) = @_;
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$self->{_level} = LOGWARN;
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if (defined($loglevel) and ($loglevel =~ /^\d+$/)) {
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$self->{_level} = $loglevel;
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}
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$self->register_hook('logging', 'wlog');
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# If you want to capture this log entry with this plugin, you need to
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# wait until after you register the plugin
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$self->log(LOGINFO,'Initializing logging::warn plugin');
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}
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sub wlog {
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my ($self, $transaction, $trace, $hook, $plugin, @log) = @_;
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# Don't log your own log entries! If this is the only logging plugin
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# then these lines will not be logged at all. You can safely comment
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# out this line and it will not cause an infinite loop.
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return DECLINED if defined $plugin and $plugin eq $self->plugin_name;
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warn
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join(" ", $$ .
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(defined $plugin ? " $plugin plugin:" :
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defined $hook ? " running plugin ($hook):" : ""),
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@log), "\n"
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if ($trace <= $self->{_level});
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return DECLINED;
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}
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@ -163,7 +163,7 @@ sub clam_scan {
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my $filename = $transaction->body_filename;
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unless (defined $filename) {
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$self->log(LOGERROR, "didn't get a filename");
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$self->log(LOGWARN, "didn't get a filename");
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return DECLINED;
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}
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my $mode = (stat($self->{_spool_dir}))[2];
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@ -64,7 +64,7 @@ sub uvscan {
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unless ( $content_type
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&& $content_type =~ m!\bmultipart/.*\bboundary="?([^"]+)!i )
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{
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$self->log( LOGERROR, "non-multipart mail - skipping" );
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$self->log( LOGWARN, "non-multipart mail - skipping" );
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return DECLINED;
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}
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@ -57,7 +57,7 @@ sub REAPER {
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$SIG{CHLD} = \&REAPER;
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while ( defined(my $chld = waitpid(-1, WNOHANG)) ){
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last unless $chld > 0;
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warn("$$ cleaning up after $chld\n");
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::log(LOGINFO,"cleaning up after $chld");
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delete $childstatus{$chld};
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}
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}
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@ -79,7 +79,6 @@ my $server = IO::Socket::INET->new(LocalPort => $PORT,
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Reuse => 1,
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Listen => SOMAXCONN )
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or die "Creating TCP socket $LOCALADDR:$PORT: $!\n";
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::log(LOGINFO,"Listening on port $PORT");
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# Drop priviledges
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my (undef, undef, $quid, $qgid) = getpwnam $USER or
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@ -91,15 +90,15 @@ POSIX::setuid($quid) or
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die "unable to change uid: $!\n";
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$> = $quid;
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::log(LOGINFO, 'Running as user '.
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(getpwuid($>) || $>) .
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', group '.
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(getgrgid($)) || $)));
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# Load plugins here
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my $plugin_loader = Qpsmtpd::TcpServer->new();
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$plugin_loader->load_plugins;
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::log(LOGINFO,"Listening on port $PORT");
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::log(LOGINFO, 'Running as user '.
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(getpwuid($>) || $>) .
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', group '.
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(getgrgid($)) || $)));
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while (1) {
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my $running = scalar keys %childstatus;
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@ -189,8 +188,7 @@ while (1) {
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sub log {
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my ($level,$message) = @_;
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# $level not used yet. this is reimplemented from elsewhere anyway
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warn("$$ $message\n");
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$plugin_loader->log($level,$message);
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}
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__END__
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