perlmail-accept

   1 #! /usr/bin/perl
   2 #
   3 #       $Id$
   4 # Copyright (C) 2002-2003 Jan Kratochvil <project-PerlMail@jankratochvil.net>
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; if not, write to the Free Software
  18 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19
  20
  21 use vars qw($VERSION);
  22 $VERSION=do { my @r=(q$Revision$=~/\d+/g); sprintf "%d.".("%03d"x$#r),@r; };
  23 use strict;
  24 use warnings;
  25
  26
  27 INIT {
  28         require Sys::Syslog;
  29         Sys::Syslog::openlog("perlmail","pid","mail");
  30         my @syslogging_stack;
  31         sub syslogging_on_save
  32         {
  33                 push @syslogging_stack,$SIG{"__WARN__"},$SIG{"__DIE__" };
  34                 $SIG{"__WARN__"}=sub { Sys::Syslog::syslog("warning","WARN: %s",$_[0]); };      # disabled: print STDERR $_[0];
  35                 $SIG{"__DIE__" }=sub { Sys::Syslog::syslog("crit"   ,"DIE: %s" ,$_[0]); };
  36         }
  37         syslogging_on_save();
  38         sub syslogging_restore
  39         {
  40                 $SIG{"__DIE__" }=pop @syslogging_stack;
  41                 $SIG{"__WARN__"}=pop @syslogging_stack;
  42         }
  43         }
  44
  45
  46 use File::Basename;
  47 BEGIN {
  48         use lib $ENV{"PERLMAIL_BASEDIR"} || File::Basename::dirname($0);
  49         use PerlMail::Config;
  50         use PerlMail::Lib;
  51         }
  52
  53 use Mail::Audit qw(MAPS);
  54 require IO::Handle;
  55 use Carp qw(cluck confess);
  56 use POSIX qw(WIFEXITED WEXITSTATUS WIFSIGNALED WTERMSIG WIFSTOPPED WSTOPSIG);
  57 require POSIX;  # for ceil
  58 use User::Utmp;
  59 use Getopt::Long;
  60 require Mail::Address;
  61 require MIME::Words;
  62 require Cz::Cstocs;
  63 require HTML::Entities;
  64 require MIME::Head;
  65 require Lingua::EN::Squeeze;
  66 require Mail::Mailer;
  67 require HTTP::Cookies;
  68 require HTTP::Request;
  69 require LWP::UserAgent;
  70 use URI::Escape 'uri_escape';
  71 require WWW::SMS;
  72 require Authen::SASL;   # Sanity check for &Net::SMTP::auth
  73 use MIME::Base64;
  74 use IPC::Open3;
  75 use POSIX ":sys_wait_h";
  76
  77
  78 our($Message,@AuditStored,$DoBell);
  79 my %alternates_host;    # from @alternates_host
  80 my %dnsbl_whitelist;    # from @dnsbl_whitelist
  81
  82 # from RedHat "procmail-3.22-5"
  83 # /i should be only $procmailFROM_DAEMON but how it can hurt to /i all?
  84 our $procmailTO_        =qr'^((Original-)?(Resent-)?(To|Cc|Bcc)|(X-Envelope|Apparently(-Resent)?)-To):(.*[^-a-zA-Z0-9_.])?'mio;
  85 our $procmailTO         =qr'^((Original-)?(Resent-)?(To|Cc|Bcc)|(X-Envelope|Apparently(-Resent)?)-To):(.*[^a-zA-Z])?'mio;
  86 our $procmailFROM_DAEMON=qr'^(Mailing-List:|Precedence:.*(junk|bulk|list)|To: Multiple recipients of |(((Resent-)?(From|Sender)|X-Envelope-From):|>?From )([^>]*[^(.%@a-z0-9])?(Post(ma?(st(e?r)?|n)|office)|(send)?Mail(er)?|daemon|m(mdf|ajordomo)|n?uucp|LIST(SERV|proc)|NETSERV|o(wner|ps)|r(e(quest|sponse)|oot)|b(ounce|bs\.smtp)|echo|mirror|s(erv(ices?|er)|mtp(error)?|ystem)|A(dmin(istrator)?|MMGR|utoanswer))(([^).!:a-z0-9][-_a-z0-9]*)?[%@>        ][^<)]*(\(.*\).*)?)?$([^>]|$))'mio;
  87 $procmailFROM_MAILER=qr'^(((Resent-)?(From|Sender)|X-Envelope-From):|>?From )[^>]*\b(Post(ma(st(er)?|n)|office)|(send)?Mail(er)?|daemon|mmdf|n?uucp|ops|r(esponse|oot)|(bbs\.)?smtp(error)?|s(erv(ices?|er)|ystem)|A(dmin(istrator)?|MMGR))(([^).!:a-z0-9][-_a-z0-9]*)?[%@>      ][^<)]*(\(.*\).*)?)?$([^>]|$)'mio;
  88 # perl-5.8.0 does not cope w/original FROM_MAILER on the third '?' character
  89 # Thus we did '([^>]*[^(.%@a-z0-9])?' -> '[^>]*\b', I hope it is somehow similiar
  90 # original FROM_MAILER  =qr'^(((Resent-)?(From|Sender)|X-Envelope-From):|>?From )([^>]*[^(.%@a-z0-9])?(Post(ma(st(er)?|n)|office)|(send)?Mail(er)?|daemon|mmdf|n?uucp|ops|r(esponse|oot)|(bbs\.)?smtp(error)?|s(erv(ices?|er)|ystem)|A(dmin(istrator)?|MMGR))(([^).!:a-z0-9][-_a-z0-9]*)?[%@>    ][^<)]*(\(.*\).*)?)?$([^>]|$)'mio;
  91
  92 my $opt_mode;
  93 my $opt_smstest;        # 1 or $smscount
  94 my $opt_idle;
  95 my $opt_dry;
  96 my $opt_single;
  97
  98
  99 sub process;
 100
 101 sub stdin
 102 {
 103         syslogging_restore();   # This is more a debugging session
 104         local $/="\n";
 105         my $message="";
 106         local $_;
 107         while (<>) {
 108                 die "Invalid 'From ' line: $_" if $message eq "" && !/^From /;
 109                 if (!$opt_single && /^From / && $message) {
 110                         process $message;
 111                         $message="";
 112                         }
 113                 $message.=$_;
 114                 }
 115         process $message if $message;
 116         exit 0;
 117 }
 118
 119 # FIXME: separate 'perlmail'-transfer together with perlmail-submit away
 120 sub inetd
 121 {
 122         die "Excessive arguments" if @ARGV;
 123
 124         IO::Handle::autoflush STDOUT 1;
 125
 126         while (1) {
 127                 local $/="\n";
 128                 my $length=<STDIN>;
 129                 confess "Unexpected EOF" if !defined $length;
 130                 confess "Missing EOL" if $length!~s/\n$//s;
 131                 exit 0 if $length eq "BYE";
 132                 confess "Unrecognized length: $length" if $length!~/^\d+$/;
 133                 my $message;
 134                 local $_;
 135                 $length==($_=read STDIN,$message,$length) or confess "Got $_ out of required $length bytes";
 136                 $length==length $message or confess "False read return ".length($message)." instead of $length";
 137                 {
 138                         # Do not: local *STDOUT;        # FIXME: fd's inherited by spawned processes are not closed this way!
 139                         #         local *STDERR;        # FIXME: fd's inherited by spawned processes are not closed this way!
 140                         # as IPC::Open3 and IPC::Open2 will not redirect the output
 141                         # and send it to the original socket instead!
 142                         local $DoBell=0;
 143                         process $message;
 144                         if ($DoBell) {
 145                                 bell() or warn "Unable to BELL";
 146                                 }
 147                         }
 148                 print STDOUT "1";
 149                 }
 150         die "NOTREACHED";
 151 }
 152
 153 sub bell
 154 {
 155         local *BELL;
 156         open BELL,">/dev/tty11" or return 0;
 157         print BELL "\x07";
 158         close BELL or return 0;
 159         return 1;
 160 }
 161
 162 sub useridle
 163 {
 164         return 0 if ! -e "$HOME/away";
 165         my %valid_users=map(($_=>1),@ValidUsers);
 166         my($idlebest,$linebest);
 167         for my $utmp (User::Utmp::getut(),{ "ut_line"=>"psaux" }) {
 168                 local $_;
 169                 next if defined($_=$utmp->{"ut_type"}) && $_!=User::Utmp::USER_PROCESS;
 170                 next if defined($_=$utmp->{"ut_user"}) && !$valid_users{$_};
 171                 my $line="/dev/".$utmp->{"ut_line"};
 172                 my $atime=(stat $line)[8];
 173                 my $what="user \"".($utmp->{"ut_user"} || "<local>")."\", line \"$line\"";
 174                 warn "Unable to stat $what" and next if !$atime;
 175                 my $idle=time()-$atime;
 176                 warn "atime in future for $what" and next if $idle<0;
 177                 next if $idle>$IdleMax;
 178                 next if defined $idlebest && $idlebest<=$idle;
 179                 $idlebest=$idle;
 180                 $linebest=$line;
 181                 }
 182         return !wantarray() ? $idlebest : ($idlebest,$linebest);
 183 }
 184
 185 # return only the very (recursive) first part
 186 sub body_first
 187 {
 188         return $Audit if !$Audit->is_mime();
 189         my $first=$Audit;
 190         local $_;
 191         $first=$_ while $_=$first->parts(0);
 192         return $first;
 193 }
 194
 195 sub is_multipart
 196 {
 197         return 0 if !$Audit->is_mime();
 198         return $Audit->is_multipart();
 199 }
 200
 201 sub mimehead
 202 {
 203 my($part)=@_;
 204
 205         return $Audit->is_mime() ? $part->head()
 206                         : MIME::Head->new([ split "\n",$Audit->head()->as_string() ])
 207                         ;
 208 }
 209
 210 sub mimebody
 211 {
 212 my($part)=@_;
 213
 214         # be vary cautious here as most of $part methods will encode it!
 215         return join "",@{$Audit->body()} if !$Audit->is_mime();
 216         my $bodyhandle=$part->bodyhandle();
 217         # If MIME is corrupted we don't get bodyhandle() for this part
 218         # It may occur when "boundary" is specified by header but no such boundary is found in the body
 219         return $bodyhandle->as_string() if $bodyhandle;
 220         warn "MIME corrupted, adapting";
 221         return $part->body_as_string();
 222 }
 223
 224 sub mime_type
 225 {
 226 my($part)=@_;
 227
 228         return $Audit->is_mime() ? $part->effective_type() : mimehead($part)->mime_type();
 229 }
 230
 231 sub body_simple
 232 {
 233         my $first=body_first();
 234         my $r=mimebody($first);
 235         my $mime_type=mime_type($first);
 236            if ($mime_type eq "text/html") {
 237                 # HTML::FormatText just does a useless text layouts
 238                 # PerlIO::via::StripHTML probably needs PerlIO input (?)
 239                 $r=~s/<[^>]*>//gs;
 240                 $r=HTML::Entities::decode($r);
 241                 # FIXME: detect charset from <meta> tag: "Content-type: text/html; charset=<???>"
 242                 }
 243         elsif ($mime_type eq "application/pgp-encrypted"
 244                && (my $filename=mimehead($first)->mime_attr("Content-Disposition.filename"))
 245                ) {
 246                 # first part contains just "Version: 1" as of GnuPG v1.0.4 (GNU/Linux)
 247                 $r="pgp($filename)";
 248                 }
 249         if ((my $charset=mimehead($first)->mime_attr("Content-Type.charset"))) {
 250                 my $cstocs=Cz::Cstocs->new($charset,"ascii");
 251                 $r=&$cstocs($r) if $cstocs;     # charset may be unknown
 252                 }
 253         return $r;
 254 }
 255
 256 sub parts_linear
 257 {
 258 my($part)=@_;
 259
 260         return $Audit if !$part && !$Audit->is_mime();
 261         $part||=$Audit;
 262         # don't use '!$part->parts()' as even 0-parts-multiparts are still multiparts
 263         return $part if $part->bodyhandle();
 264         return map { (parts_linear($_)); } $part->parts();
 265 }
 266
 267 sub smsbuild
 268 {
 269 my($smsi,$smscount)=@_;
 270
 271         return "$smsi/$smscount:" if $smscount>1;
 272         return "";
 273 }
 274
 275 sub smslens
 276 {
 277 my($ignorenewmail,$smscount,%args)=@_;
 278
 279         return map({
 280                         my $l=160;
 281                         if (!$ignorenewmail) {  # send by mail
 282                                 $l-=length("Z emailu FIXME SMSmailError: ");
 283                                 $l-=length(smsbuild($_,$smscount));
 284                                 }
 285                         else {  # send by web
 286                                 $l-=6;  # 154 is the max length before split; why?
 287                                 }
 288                         $l;
 289                         } (0..$smscount-1));
 290 }
 291
 292 sub smssend_web
 293 {
 294 my($squeezed,$smscount,@lens)=@_;
 295
 296         $smscount=POSIX::ceil($smscount/5);
 297         for my $smsi (0..$smscount-1) {
 298                 my $len=$lens[$smsi];
 299                 $squeezed=~/^.{0,$len}/s;
 300                 my $frag=$&;
 301                 $squeezed=$';
 302                 return 0 if 3!=@SMSwebRcpt;
 303                 local *F;
 304                 open F,"$HOME/priv/WWW-SMS-$SMSwebRcpt_username.pwd" or return 0;
 305                 my $pwd=<F>;
 306                 chomp $pwd;
 307                 close F;
 308                 my $sms=WWW::SMS->new(@SMSwebRcpt,$frag,"username"=>$SMSwebRcpt_username,"passwd"=>$pwd);
 309                 for ($sms->gateways("sorted"=>"reliability")) {
 310                         last if $sms->send($_);
 311                         Sys::Syslog::syslog("warning","Web SMS send failed: %s",$WWW::SMS::Error);
 312                         my $void=$WWW::SMS::Error;      # Prevent: Name "WWW::SMS::Error" used only once
 313                         }
 314                 }
 315         return 1;
 316 }
 317
 318 sub smssend_mail
 319 {
 320 my($squeezed,$smscount,@lens)=@_;
 321
 322         return 0;
 323 }
 324
 325 sub smssend
 326 {
 327 my($ignorenewmail,$smscount,%args)=@_;
 328
 329         my $text=PerlMail::Config::audit_sms(
 330                         "subject"=>unmime($Audit->subject()),
 331                         "from"=>[ Mail::Address->parse(unmime($Audit->from())) ],
 332                         "body"=>substr(body_simple(),0,$MaxBodySMS*(1+0.25*$smscount)),
 333                         %args);
 334         my $texthead="";
 335         ($texthead,$text)=@$text if ref $text;
 336         do { print "$texthead\n$text\n"; return; } if $opt_smstest;
 337         my @lens=smslens($ignorenewmail,$smscount,%args);
 338         my $maxlen=0;
 339         $maxlen+=$_ for (@lens);
 340         my $squeezed;
 341         for my $squeeze (@sms_squeezes) {
 342                 local $_;
 343                  Lingua::EN::Squeeze::SqueezeControl($_)    if defined ($_=$squeeze->{"SqueezeControl"});
 344                 $Lingua::EN::Squeeze::SQZ_OPTIMIZE_LEVEL or 1;  # prevent: Name "$_" used only once: possible typo
 345                 $Lingua::EN::Squeeze::SQZ_OPTIMIZE_LEVEL=$_ if defined ($_=$squeeze->{"SQZ_OPTIMIZE_LEVEL"});
 346                 $squeezed=Lingua::EN::Squeeze::SqueezeText($text);
 347                 chomp $squeezed;
 348                 last if $maxlen>=length($texthead.$squeezed);
 349                 }
 350         $squeezed=substr $texthead.$squeezed,0,$maxlen; # strip if we passed thru last for() above
 351         my $recalclen=0;
 352         for ($smscount=0;$recalclen<length $squeezed;$smscount++) {
 353                 $recalclen+=$lens[$smscount];
 354                 }
 355         my $func=($ignorenewmail ? \&smssend_web : \&smssend_mail);
 356         &$func($squeezed,$smscount,@lens);
 357 }
 358
 359 sub smssend_tryall
 360 {
 361 my($ignorenewmail,@args)=@_;
 362
 363         return if !$opt_smstest && !$opt_idle && defined useridle();
 364         local $_;
 365         return $_ if                     $_=smssend(1,@args);   # web
 366         return $_ if !$ignorenewmail && ($_=smssend(0,@args));  # mail
 367         warn "Unable to SMSsend the mail";
 368         return 0;
 369 }
 370
 371 sub cut
 372 {
 373         local $_=$_[0];
 374         return "<???>" if !defined($_) || /^\s*$/s;
 375         s/^\s*//s;
 376         s/\s*$//s;
 377         return $_ if length($_)<128;
 378         return substr($_,0,128)."...";
 379 }
 380
 381 our $profile_eval_depth=0;
 382 # ($name || @$name)
 383 sub profile_eval
 384 {
 385 my($name)=@_;
 386
 387         die "Nesting profile: $name" if 0x10<=(local $profile_eval_depth=$profile_eval_depth+1);
 388         return @$name if ref $name;
 389         die "Profile not found: $name" if !exists $audit_profile{$name};
 390         my @this=@{$audit_profile{$name}};
 391         return (profile_eval($'),@this[1..$#this]) if $this[0] && $this[0]=~/^=/;
 392         return @this;
 393 }
 394
 395 sub address_show
 396 {
 397 my($text)=@_;
 398
 399         return join(",",map({ $_->name() or $_->address(); } Mail::Address->parse($text)));
 400 }
 401
 402 sub unmime
 403 {
 404 my($text)=@_;
 405
 406         return join "",map({
 407                         my $cstocs;
 408                         for (${$_}[1],"iso-8859-2") {
 409                                 last if $_ && ($cstocs=Cz::Cstocs->new($_,"ascii"));
 410                                 }
 411                         &$cstocs(${$_}[0]);
 412                         } MIME::Words::decode_mimewords($text));
 413 }
 414
 415 # $folder: "$folder; comment"
 416 # $profile as profile_eval($name)
 417 sub store
 418 {
 419 my($folder,$profile,%args)=@_;
 420
 421         $profile=$store_profile if !$profile;
 422         my %do=map({ (!/=/ ? ($_=>1) : ($`=>$')); } profile_eval($profile));
 423         Sys::Syslog::syslog("info","%s%s%s: %s: %s",
 424                                         (!$opt_dry ? "" : "--dry: "),
 425                                         (!$store_ignore ? "" : "IGNORED[$store_ignore]: "),
 426                                         map({ cut($_); } $folder,address_show(unmime($Audit->from())),unmime($Audit->subject())),
 427                                         )
 428                         if $do{"syslog"} || $opt_dry;
 429         $folder=~s/;.*$//s;
 430         $folder="$Mail/".$' if $folder=~/^=/;
 431         push @AuditStored,$folder if $do{"did"};
 432         return if $store_ignore || $opt_dry;
 433         $DoBell++ if $do{"bell"};
 434         write_message($folder) or die;
 435         smssend_tryall $store_ignorenewmail,$do{"sms"},%args if $do{"sms"};
 436 }
 437
 438 our $did_last=0;
 439
 440 # no &$funcref=>did smth in this block
 441 # &$funcref,@funcargs
 442 sub did
 443 {
 444 my($funcref,@funcargs)=@_;
 445
 446         return @AuditStored!=$did_last if !$funcref;
 447         local $did_last=@AuditStored;
 448         &$funcref(@funcargs);
 449         return @AuditStored!=$did_last;
 450 }
 451
 452 # Never use Mail::Audit->store() as it will reformat MIME bodies and possibly corrupt OpenPGP!
 453 sub write_message
 454 {
 455 my($folder)=@_;
 456
 457         return 1 if $opt_dry;   # simulate OK
 458         local *F;
 459         open F,">>$folder" or do { warn "Append \"$folder\": $!"; return 0; };
 460         {
 461                 local $_;
 462                 ($_=Mail::Audit::audit_get_lock(\*F,$folder)) and do { warn "Lock \"$folder\": $!"; last; };
 463                 seek F,0,IO::Handle::SEEK_END or do { warn "Seek-end \"$folder\": $!"; last; };
 464                 # FIXME: Check for '^From ' to not to rely on our network peer
 465                 print F $Message or do { warn "Write to \"$folder\": $!"; last; };
 466                 do { print F "\n"; warn "Missing trailing newline, fixed"; } if $Message!~/\n$/s;
 467                 close F or do { warn "Close \"$folder\""; last; };
 468                 return 1;       # OK
 469                 }
 470         warn "MAIL DROPPED for folder: $folder";
 471         close F;
 472         return 0;       # failed
 473 }
 474
 475 sub process
 476 {
 477 my($message)=@_;
 478
 479         local $_=$_;
 480         my $save_=$_;
 481         $message=~s/(\n)(From )/$1>$2/sg;
 482         local $Message=$message;
 483         # Cannot call 'local' for our-imported variable:
 484         my $Audit_save=$Audit;
 485         $Audit=Mail::Audit->new(
 486                         "emergency"=>"$Mail/emergency",
 487                         "data"=>[map("$_\n",split("\n",$message))],
 488                         "log"=>"$HOME/.perlmail.log",
 489                         "loglevel"=>99,
 490                         );
 491         local @AuditStored=();
 492         do { smssend 0,$opt_smstest; return; } if $opt_smstest;
 493         write_message("$Mail/input") or die;
 494         PerlMail::Config::audit();
 495         warn 'Corrupted $_, repaired' if defined($save_)!=defined($_) || (defined($_) && $save_ ne $_);
 496         # restore:
 497         $Audit=$Audit_save;
 498 }
 499
 500 # utility functions:
 501
 502 sub _spamchildcode
 503 {
 504 my($err,$isspam)=@_;
 505
 506         $err=$? if !defined $err;
 507         return undef()    if !WIFEXITED($?);
 508         return undef()    if  WIFSIGNALED($?);
 509         return undef()    if  WIFSTOPPED($?);
 510         return 0 if !WEXITSTATUS($?);
 511         return $isspam||1 if 1==WEXITSTATUS($?);        # isspam
 512         cluck "Possible FIXME or your system is broken (WEXITSTATUS==".WEXITSTATUS($?).")";
 513         return 0;       # simulate as not spam
 514 }
 515
 516 # return: true (error-message or "1") if is spam
 517 sub spamassassin
 518 {
 519 my($cmd)=@_;
 520
 521         $cmd||="spamassassin --exit-code 1";
 522         # spamassassin has the specified exit code if IS spam, code 0 if NOT spam
 523         # See &_spamchildcode for the code 1.
 524         local *CHILD;
 525         local $SIG{"PIPE"}=sub { warn "spamassassin gave me SIGPIPE: broken pipe"; };
 526         # prevent Razor2's: Can't call method "log" on unblessed reference at Razor2/Client/Agent.pm line 212.
 527         local $ENV{"HOME"}=$HOME;
 528         # 2>/dev/null to prevent error messages to corrupt inetd() output of perlmail-accept(1)
 529         open CHILD,"|$cmd --mbox >/dev/null 2>/dev/null"
 530                         or return 0;
 531         print CHILD $Message;
 532         close CHILD;
 533         return _spamchildcode;
 534 }
 535
 536 # NOTE: returns undef() if !wantarray and the first header is unrecognized
 537 # Returns always HOST:IP pair(s).
 538 sub Received_for
 539 {
 540         my @r=();
 541         for my $hdr ($Audit->head->get("Received")) {
 542                 my($for)=($hdr=~/\bfor\s+\<?(\S+)\>?\b/);
 543                 return $for if !wantarray();
 544                 push @r,$for if $for;
 545                 my($from,$fromaddr)=($hdr=~/\bfrom\s+(?:(\S+)\b.*?)??\[((?:\d{1,3}\.){3}\d{1,3})\]/);
 546                 $from=$fromaddr if !defined $from;
 547                 push @r,"$from:$fromaddr" if $from;
 548                 }
 549         return @r;
 550 }
 551
 552 # Extended Mail::Audit::MAPS
 553 # $domain,$full,[$timeout]
 554 # Returns false if valid, code if spam detected.
 555 sub dnsbl
 556 {
 557 my($domain,$full,$timeout)=@_;
 558
 559         $timeout||=30;  # sec
 560         $Mail::Audit::MAPS::host=$domain;
 561         for my $host (Received_for()) {
 562                 next if $host!~/^([^:@]*):/;
 563                 my $ip=$';
 564                 # $1 is DNS name, $ip is IP address
 565                 next if $alternates_host{$1};   # leave only foreign hosts
 566                 next if $dnsbl_whitelist{$ip};
 567                 {
 568                         package My::Audit::Faked;
 569                         sub received { return @{$_[0]->{"received"}}; }
 570                         }
 571                 my $self_faked={
 572                                 "received"=>["[$ip]"],
 573                                 };
 574                 bless $self_faked,"My::Audit::Faked";
 575                 my $code=Mail::Audit::rblcheck($self_faked,$timeout);
 576                 next if !$code;
 577                 # Some 0.0.0.0 etc. found for <linux-kernel@>, see: &Mail::Audit::MAPS::_checkit
 578                 # Do not: $code!='1 Invalid IP address '
 579                 # as it causes warn.
 580                 return $code if $code ne '1 Invalid IP address ';
 581                 return if !$full;
 582                 }
 583 }
 584
 585 # Returns true if IS virus; the message will contain the virus name
 586 sub clamscan
 587 {
 588 my($cmd)=@_;
 589
 590         $cmd||='clamscan --no-summary -';
 591         # clamscan has exit code 1 if IS virus , code 0 if NOT virus
 592         # Do not use IPC::Open2 as it would try to use our STDERR which is not valid by: local *STDERR;
 593         local(*WR,*RD,*ERR);
 594         local $SIG{"PIPE"}=sub { warn "clamscan '$cmd' gave me SIGPIPE: broken pipe"; };
 595         my $pid=open3(\*WR,\*RD,\*ERR,$cmd.' 2>&1')
 596                         or do { cluck "IPC::Open3 $cmd: $!"; return 0; };
 597         print WR $Message;
 598         close WR or do { cluck "close WR of $cmd: $!"; return 0; };
 599         my $status=do { local $/=undef(); <RD>; };
 600         close RD or do { cluck "close RD of $cmd: $!"; return 0; };
 601         # Do not: $status.=do { local $/=undef(); <ERR>; };
 602         #         close ERR or do { cluck "close ERR of $cmd: $!"; return 0; };
 603         # (FIXME) as it causes: Use of uninitialized value in <HANDLE>
 604         # waitpid fills $? for: &_spamchildcode
 605         local $SIG{"ALRM"}=sub { warn "Timeout $clamscan_waitpid_timeout sec waiting for child $cmd"; };
 606         alarm $clamscan_waitpid_timeout;
 607         # Do not: WNOHANG
 608         # as it would not be enough for clamscan(1) even after all close-s above.
 609         my $pidcheck=waitpid($pid,0);
 610         alarm 0;
 611         my $err=$?;
 612         $pidcheck && $pidcheck==$pid
 613                         or do { cluck "waitpid for $cmd returned $pidcheck!=$pid"; return 0; };
 614         $status=~s/^stdin: //mg;
 615         # Prevent: LibClamAV Warning: PGP encoded attachment not scanned
 616         $status=~s/^.*\bwarning:.*\n//img;
 617         $status=~s/\n$//;
 618         return $status if $status ne "OK" && $status;
 619         return _spamchildcode $err,$status;
 620 }
 621
 622 sub muttrc_aliases
 623 {
 624         my %r=();
 625         for (muttrc()) {
 626                 next if !(my $key=(/^alias\s+(\S+)\s+/)[0]);
 627                 for my $addrobj (Mail::Address->parse($')) {
 628                         my $addr=$addrobj->address();
 629                         my $ref=\$r{"\L$addr"};
 630                         $$ref=$key if !$$ref;   # use always the first occurence to prefer nicks
 631                         }
 632                 }
 633         return %r;
 634 }
 635
 636 # FIXME: host may get multiple recipients and thus not showing "for <...>"
 637 # FIXME: muttrc_get("from") is too strict
 638 sub store_muttrc_alternates
 639 {
 640 my($prefix,$profile)=@_;
 641
 642         my $alternates=muttrc_get("alternates") or return;
 643         my $alternatesre=qr/$alternates/si;
 644         my $From=muttrc_get("from") or return;
 645         my $Fromre=qr/^\Q$From\E$/si;
 646         my $Fromobj=parseone $From or return;
 647         warn "'From' \"$From\" not matched by 'alternates': $alternatesre"
 648                         if $From!~/$alternates/si;
 649         for my $for (reverse Received_for()) {
 650                 $for=~s/:.*$//; # strip IP address here
 651                 my $forobj=parseone $for;
 652                 if ($forobj && $forobj->host()) {
 653                         # it is 'for' our primary address
 654                         next if lc($forobj->host()) eq lc($Fromobj->host());    # or 'return'? shouldn't matter
 655                         }
 656                 next if !$alternates_host{lc $for} && $for!~/$alternatesre/si;
 657                 store "$prefix\L$for",($profile || []);
 658                 return;
 659                 }
 660 }
 661
 662 # $header: ref CODE
 663 # $header: !ref => $Audit->get($header)
 664 # $maybeaddress: qr/regex/i
 665 # $maybeaddress: "string"
 666 # $maybeaddress: "<Regexp:regex>"       # hack :-(
 667 # $maybeaddress: "<user@host>"
 668 # $maybeaddress: "<user@>"
 669 # $maybeaddress: "<@host>"
 670 sub _headercore
 671 {
 672 my($re,$justone,$header,$maybeaddress)=@_;
 673
 674         if (ref $header) {
 675                 $header=join(",",&$header());
 676                 }
 677         else {
 678                 $header=$Audit->get($header);
 679                 }
 680         return 0 if !$header;
 681         return $header=~/$maybeaddress/i if "Regexp" eq ref $maybeaddress;
 682         return $header=~/$re/i if !defined(my $want=($maybeaddress=~/^\<(.*)\>$/)[0]);
 683         my @parsed=Mail::Address->parse($header);
 684         warn "'mailto:' forbidden in pattern: $want" if $want=~/^\Qmailto:\E/;
 685         return 0 if $justone && 1!=@parsed;
 686         return grep {
 687                            if ($want=~/^Regexp:/)
 688                                 { $_->address()=~/$'/i; }
 689                         elsif ($want=~/\@$/)
 690                                 { $_->user()   =~/^(?:\Qmailto:\E)?\Q$`\E/i; }
 691                         elsif ($want=~/^\@/)
 692                                 { $_->host()   =~/^\Q$'\E/i; }
 693                         else
 694                                 { $_->address()=~/^(?:\Qmailto:\E)?\Q$want\E/i; }
 695                         } @parsed;
 696 }
 697
 698 sub headerhas
 699 {
 700 my($header,$substr)=@_;
 701
 702         return _headercore(qr/\Q$substr\E/i,0,$header,$substr);
 703 }
 704
 705 sub headeris
 706 {
 707 my($header,$string)=@_;
 708
 709         return _headercore(qr/\Q$string\E/i,1,$header,$string);
 710 }
 711
 712 # $header,%$map
 713 sub header_remap
 714 {
 715 my($header,$map)=@_;
 716
 717         my $text=$Audit->get($header);
 718         my $orig=$text;
 719         while (my($from,$to)=each(%$map)) {
 720                 $text=~s/\b\Q$from\E\b/$to/gsi;
 721                 }
 722         return if $text eq $orig;
 723         $Audit->put_header("X-PerlMail-header_remap-$header",$orig);
 724         $Audit->replace_header($header,$text);
 725 }
 726
 727 # LMTP engine:
 728 use Net::Cmd qw(CMD_OK CMD_MORE);
 729 {
 730         package My::Net::SMTP::LMTP;
 731         require Net::SMTP;
 732         our @ISA=qw(Net::SMTP);
 733         use Net::SMTP;
 734         use Net::Cmd qw(CMD_OK);
 735         use Carp qw(confess cluck);
 736
 737         # Do not: sub _HELO
 738         # as it would not set {'net_smtp_esmtp'}
 739         sub _EHLO { shift->command("LHLO", @_)->response()  == CMD_OK }
 740
 741         sub clucked
 742         {
 743         my($self,$func,@args)=@_;
 744
 745                 do { return $_ if defined $_; } for $self->$func(@args);
 746                 cluck $func;
 747                 return;
 748         }
 749 }
 750
 751
 752 sub lmtp_deliver
 753 {
 754 my($admin_user,$admin_pwd,$user_from,$user_to)=@_;
 755
 756         my $lmtp=My::Net::SMTP::LMTP->clucked("new","localhost","Port"=>"lmtp",
 757 #                       "Debug"=>1,
 758                         ) or return;
 759         bless $lmtp,"My::Net::SMTP::LMTP";
 760 # Prevent:
 761 # due to:
 762 #       $lmtp->auth(Authen::SASL->new(
 763 #                       "mechanism"=>"PLAIN",
 764 #                       "callback"=>{
 765 #                                       "user"=>$admin_user,
 766 #                                       "pass"=>$admin_pwd,
 767 #                                       # Prevent: "authname"=>$admin_user
 768 #                                       # as it causes: DIE: Unknown callback: 'authname'. (user|auth|language|pass)
 769 #                                       }));
 770         # FIXME: Authentication hack:
 771         $lmtp->command("AUTH PLAIN")->response()==CMD_MORE
 772                         or do { cluck "auth announce"; return; };
 773         $lmtp->clucked("command",encode_base64($user_from."\x00".$admin_user."\x00".$admin_pwd)) or return;
 774         $lmtp->clucked("mail",$user_from) or return;
 775         $lmtp->clucked("to",$user_to) or return;
 776         $lmtp->clucked("data"); # Do not: or return;
 777         # Prevent: 554 5.6.0 Message contains invalid header
 778         (my $data=$Message)=~s/\AFrom .*\r?\n//;
 779         $lmtp->clucked("datasend",$data) or return;
 780         $lmtp->clucked("dataend") or return;
 781         $lmtp->clucked("quit") or return;
 782 }
 783
 784
 785 # MAIN
 786
 787 $Getopt::Long::ignorecase=0;
 788 die "GetOptions error" if !Getopt::Long::GetOptions(
 789                   "inetd"    ,sub { $opt_mode=\&inetd; },
 790                   "stdin"    ,sub { $opt_mode=\&stdin; },
 791                   "single!"  ,\$opt_single,
 792                   "dry"      ,\$opt_dry,
 793                   "smstest:s",sub { $opt_mode=\&stdin; $opt_smstest=($_[1] || 1); },
 794                   "idle!"    ,\$opt_idle,
 795                   "idletest" ,sub { syslogging_restore(); print((defined($_=useridle()) ? $_ : "<undef>")."\n"); exit 0; },
 796                   "muttrc"   ,sub { syslogging_restore(); print scalar muttrc(); exit 0; },
 797                 );
 798 # "Excessive arguments" checked in &inetd
 799 die "Missing mode" if !$opt_mode;
 800
 801 %alternates_host=map((lc($_)=>1),@alternates_host);
 802 %dnsbl_whitelist=map((   $_ =>1),@dnsbl_whitelist);
 803
 804 &$opt_mode();
 805 die "NOTREACHED";