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($0);
  49         use PerlMail::Config;
  50         use PerlMail::Lib;
  51         }
  52
  53 use Mail::Audit qw(MAPS);
  54 require IO::Handle;
  55 use Carp qw(cluck confess);
  56 use POSIX qw(WIFEXITED WEXITSTATUS WIFSIGNALED WTERMSIG WIFSTOPPED WSTOPSIG);
  57 require POSIX;  # for ceil
  58 use User::Utmp;
  59 use Getopt::Long;
  60 require Mail::Address;
  61 require MIME::Words;
  62 require Cz::Cstocs;
  63 require HTML::Entities;
  64 require MIME::Head;
  65 require Lingua::EN::Squeeze;
  66 require Mail::Mailer;
  67 require HTTP::Cookies;
  68 require HTTP::Request;
  69 require LWP::UserAgent;
  70 use URI::Escape 'uri_escape';
  71 require WWW::SMS;
  72
  73
  74 our($Message,@AuditStored,$DoBell);
  75 my %alternates_host;    # from @alternates_host
  76 my %dnsbl_whitelist;    # from @dnsbl_whitelist
  77
  78 # from RedHat "procmail-3.22-5"
  79 # /i should be only $procmailFROM_DAEMON but how it can hurt to /i all?
  80 our $procmailTO_        =qr'^((Original-)?(Resent-)?(To|Cc|Bcc)|(X-Envelope|Apparently(-Resent)?)-To):(.*[^-a-zA-Z0-9_.])?'mio;
  81 our $procmailTO         =qr'^((Original-)?(Resent-)?(To|Cc|Bcc)|(X-Envelope|Apparently(-Resent)?)-To):(.*[^a-zA-Z])?'mio;
  82 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;
  83 $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;
  84 # perl-5.8.0 does not cope w/original FROM_MAILER on the third '?' character
  85 # Thus we did '([^>]*[^(.%@a-z0-9])?' -> '[^>]*\b', I hope it is somehow similiar
  86 # 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;
  87
  88 my $opt_mode;
  89 my $opt_smstest;        # 1 or $smscount
  90 my $opt_idle;
  91 my $opt_dry;
  92 my $opt_single;
  93
  94
  95 sub process;
  96
  97 sub stdin
  98 {
  99         syslogging_restore();   # This is more a debugging session
 100         local $/="\n";
 101         my $message="";
 102         local $_;
 103         while (<>) {
 104                 die "Invalid 'From ' line: $_" if $message eq "" && !/^From /;
 105                 if (!$opt_single && /^From / && $message) {
 106                         process $message;
 107                         $message="";
 108                         }
 109                 $message.=$_;
 110                 }
 111         process $message if $message;
 112         exit 0;
 113 }
 114
 115 # FIXME: separate 'perlmail'-transfer together with perlmail-submit away
 116 sub inetd
 117 {
 118         die "Excessive arguments" if @ARGV;
 119
 120         IO::Handle::autoflush STDOUT 1;
 121
 122         while (1) {
 123                 local $/="\n";
 124                 my $length=<STDIN>;
 125                 confess "Unexpected EOF" if !defined $length;
 126                 confess "Missing EOL" if $length!~s/\n$//s;
 127                 exit 0 if $length eq "BYE";
 128                 confess "Unrecognized length: $length" if $length!~/^\d+$/;
 129                 my $message;
 130                 local $_;
 131                 $length==($_=read STDIN,$message,$length) or confess "Got $_ out of required $length bytes";
 132                 $length==length $message or confess "False read return ".length($message)." instead of $length";
 133                 {
 134                         local *STDOUT;  # FIXME: fd's inherited by spawned processes are not closed this way!
 135                         local *STDERR;  # FIXME: fd's inherited by spawned processes are not closed this way!
 136                         local $DoBell=0;
 137                         process $message;
 138                         if ($DoBell) {
 139                                 bell() or warn "Unable to BELL";
 140                                 }
 141                         }
 142                 print STDOUT "1";
 143                 }
 144         die "NOTREACHED";
 145 }
 146
 147 sub bell
 148 {
 149         local *BELL;
 150         open BELL,">/dev/tty11" or return 0;
 151         print BELL "\x07";
 152         close BELL or return 0;
 153         return 1;
 154 }
 155
 156 sub useridle
 157 {
 158         return 0 if ! -e "$HOME/away";
 159         my %valid_users=map(($_=>1),@ValidUsers);
 160         my($idlebest,$linebest);
 161         for my $utmp (User::Utmp::getut(),{ "ut_line"=>"psaux" }) {
 162                 local $_;
 163                 next if defined($_=$utmp->{"ut_type"}) && $_!=User::Utmp::USER_PROCESS;
 164                 next if defined($_=$utmp->{"ut_user"}) && !$valid_users{$_};
 165                 my $line="/dev/".$utmp->{"ut_line"};
 166                 my $atime=(stat $line)[8];
 167                 my $what="user \"".($utmp->{"ut_user"} || "<local>")."\", line \"$line\"";
 168                 warn "Unable to stat $what" and next if !$atime;
 169                 my $idle=time()-$atime;
 170                 warn "atime in future for $what" and next if $idle<0;
 171                 next if $idle>$IdleMax;
 172                 next if defined $idlebest && $idlebest<=$idle;
 173                 $idlebest=$idle;
 174                 $linebest=$line;
 175                 }
 176         return !wantarray() ? $idlebest : ($idlebest,$linebest);
 177 }
 178
 179 # return only the very (recursive) first part
 180 sub body_first
 181 {
 182         return $Audit if !$Audit->is_mime();
 183         my $first=$Audit;
 184         local $_;
 185         $first=$_ while $_=$first->parts(0);
 186         return $first;
 187 }
 188
 189 sub mimehead
 190 {
 191 my($part)=@_;
 192
 193         return $Audit->is_mime() ? $part->head()
 194                         : MIME::Head->new([ split "\n",$Audit->head()->as_string() ])
 195                         ;
 196 }
 197
 198 sub mimebody
 199 {
 200 my($part)=@_;
 201
 202         # be vary cautious here as most of $part methods will encode it!
 203         return join "",@{$Audit->body()} if !$Audit->is_mime();
 204         my $bodyhandle=$part->bodyhandle();
 205         # If MIME is corrupted we don't get bodyhandle() for this part
 206         # It may occur when "boundary" is specified by header but no such boundary is found in the body
 207         return $bodyhandle->as_string() if $bodyhandle;
 208         warn "MIME corrupted, adapting";
 209         return $part->body_as_string();
 210 }
 211
 212 sub mime_type
 213 {
 214 my($part)=@_;
 215
 216         return $Audit->is_mime() ? $part->effective_type() : mimehead($part)->mime_type();
 217 }
 218
 219 sub body_simple
 220 {
 221         my $first=body_first();
 222         my $r=mimebody($first);
 223         my $mime_type=mime_type($first);
 224            if ($mime_type eq "text/html") {
 225                 # HTML::FormatText just does a useless text layouts
 226                 # PerlIO::via::StripHTML probably needs PerlIO input (?)
 227                 $r=~s/<[^>]*>//gs;
 228                 $r=HTML::Entities::decode($r);
 229                 # FIXME: detect charset from <meta> tag: "Content-type: text/html; charset=<???>"
 230                 }
 231         elsif ($mime_type eq "application/pgp-encrypted"
 232                && (my $filename=mimehead($first)->mime_attr("Content-Disposition.filename"))
 233                ) {
 234                 # first part contains just "Version: 1" as of GnuPG v1.0.4 (GNU/Linux)
 235                 $r="pgp($filename)";
 236                 }
 237         if ((my $charset=mimehead($first)->mime_attr("Content-Type.charset"))) {
 238                 my $cstocs=Cz::Cstocs->new($charset,"ascii");
 239                 $r=&$cstocs($r) if $cstocs;     # charset may be unknown
 240                 }
 241         return $r;
 242 }
 243
 244 sub parts_linear
 245 {
 246 my($part)=@_;
 247
 248         return $Audit if !$part && !$Audit->is_mime();
 249         $part||=$Audit;
 250         # don't use '!$part->parts()' as even 0-parts-multiparts are still multiparts
 251         return $part if $part->bodyhandle();
 252         return map { (parts_linear($_)); } $part->parts();
 253 }
 254
 255 sub smsbuild
 256 {
 257 my($smsi,$smscount)=@_;
 258
 259         return "$smsi/$smscount:" if $smscount>1;
 260         return "";
 261 }
 262
 263 sub smslens
 264 {
 265 my($ignorenewmail,$smscount,%args)=@_;
 266
 267         return map({
 268                         my $l=160;
 269                         if (!$ignorenewmail) {  # send by mail
 270                                 $l-=length("Z emailu FIXME SMSmailError: ");
 271                                 $l-=length(smsbuild($_,$smscount));
 272                                 }
 273                         else {  # send by web
 274                                 $l-=6;  # 154 is the max length before split; why?
 275                                 }
 276                         $l;
 277                         } (0..$smscount-1));
 278 }
 279
 280 sub smssend_web
 281 {
 282 my($squeezed,$smscount,@lens)=@_;
 283
 284         $smscount=POSIX::ceil($smscount/5);
 285         for my $smsi (0..$smscount-1) {
 286                 my $len=$lens[$smsi];
 287                 $squeezed=~/^.{0,$len}/s;
 288                 my $frag=$&;
 289                 $squeezed=$';
 290                 return 0 if 3!=@SMSwebRcpt;
 291                 local *F;
 292                 open F,"$HOME/priv/WWW-SMS-$SMSwebRcpt_username.pwd" or return 0;
 293                 my $pwd=<F>;
 294                 chomp $pwd;
 295                 close F;
 296                 my $sms=WWW::SMS->new(@SMSwebRcpt,$frag,"username"=>$SMSwebRcpt_username,"passwd"=>$pwd);
 297                 for ($sms->gateways("sorted"=>"reliability")) {
 298                         last if $sms->send($_);
 299                         Sys::Syslog::syslog("warning","Web SMS send failed: %s",$WWW::SMS::Error);
 300                         my $void=$WWW::SMS::Error;      # Prevent: Name "WWW::SMS::Error" used only once
 301                         }
 302                 }
 303         return 1;
 304 }
 305
 306 sub smssend_mail
 307 {
 308 my($squeezed,$smscount,@lens)=@_;
 309
 310         return 0;
 311 }
 312
 313 sub smssend
 314 {
 315 my($ignorenewmail,$smscount,%args)=@_;
 316
 317         my $text=PerlMail::Config::audit_sms(
 318                         "subject"=>unmime($Audit->subject()),
 319                         "from"=>[ Mail::Address->parse(unmime($Audit->from())) ],
 320                         "body"=>substr(body_simple(),0,$MaxBodySMS*(1+0.25*$smscount)),
 321                         %args);
 322         my $texthead="";
 323         ($texthead,$text)=@$text if ref $text;
 324         do { print "$texthead\n$text\n"; return; } if $opt_smstest;
 325         my @lens=smslens($ignorenewmail,$smscount,%args);
 326         my $maxlen=0;
 327         $maxlen+=$_ for (@lens);
 328         my $squeezed;
 329         for my $squeeze (@sms_squeezes) {
 330                 local $_;
 331                  Lingua::EN::Squeeze::SqueezeControl($_)    if defined ($_=$squeeze->{"SqueezeControl"});
 332                 $Lingua::EN::Squeeze::SQZ_OPTIMIZE_LEVEL or 1;  # prevent: Name "$_" used only once: possible typo
 333                 $Lingua::EN::Squeeze::SQZ_OPTIMIZE_LEVEL=$_ if defined ($_=$squeeze->{"SQZ_OPTIMIZE_LEVEL"});
 334                 $squeezed=Lingua::EN::Squeeze::SqueezeText($text);
 335                 chomp $squeezed;
 336                 last if $maxlen>=length($texthead.$squeezed);
 337                 }
 338         $squeezed=substr $texthead.$squeezed,0,$maxlen; # strip if we passed thru last for() above
 339         my $recalclen=0;
 340         for ($smscount=0;$recalclen<length $squeezed;$smscount++) {
 341                 $recalclen+=$lens[$smscount];
 342                 }
 343         my $func=($ignorenewmail ? \&smssend_web : \&smssend_mail);
 344         &$func($squeezed,$smscount,@lens);
 345 }
 346
 347 sub smssend_tryall
 348 {
 349 my($ignorenewmail,@args)=@_;
 350
 351         return if !$opt_smstest && !$opt_idle && defined useridle();
 352         local $_;
 353         return $_ if                     $_=smssend(1,@args);   # web
 354         return $_ if !$ignorenewmail && ($_=smssend(0,@args));  # mail
 355         warn "Unable to SMSsend the mail";
 356         return 0;
 357 }
 358
 359 sub cut
 360 {
 361         local $_=$_[0];
 362         return "<???>" if !defined($_) || /^\s*$/s;
 363         s/^\s*//s;
 364         s/\s*$//s;
 365         return $_ if length($_)<128;
 366         return substr($_,0,128)."...";
 367 }
 368
 369 our $profile_eval_depth=0;
 370 # ($name || @$name)
 371 sub profile_eval
 372 {
 373 my($name)=@_;
 374
 375         die "Nesting profile: $name" if 0x10<=(local $profile_eval_depth=$profile_eval_depth+1);
 376         return @$name if ref $name;
 377         die "Profile not found: $name" if !exists $audit_profile{$name};
 378         my @this=@{$audit_profile{$name}};
 379         return (profile_eval($'),@this[1..$#this]) if $this[0] && $this[0]=~/^=/;
 380         return @this;
 381 }
 382
 383 sub address_show
 384 {
 385 my($text)=@_;
 386
 387         return join(",",map({ $_->name() or $_->address(); } Mail::Address->parse($text)));
 388 }
 389
 390 sub unmime
 391 {
 392 my($text)=@_;
 393
 394         return join "",map({
 395                         my $cstocs;
 396                         for (${$_}[1],"iso-8859-2") {
 397                                 last if $_ && ($cstocs=Cz::Cstocs->new($_,"ascii"));
 398                                 }
 399                         &$cstocs(${$_}[0]);
 400                         } MIME::Words::decode_mimewords($text));
 401 }
 402
 403 # $folder: "$folder; comment"
 404 # $profile as profile_eval($name)
 405 sub store
 406 {
 407 my($folder,$profile,%args)=@_;
 408
 409         $profile=$store_profile if !$profile;
 410         my %do=map({ (!/=/ ? ($_=>1) : ($`=>$')); } profile_eval($profile));
 411         Sys::Syslog::syslog("info","%s%s%s: %s: %s",
 412                                         (!$opt_dry ? "" : "--dry: "),
 413                                         (!$store_ignore ? "" : "IGNORED[$store_ignore]: "),
 414                                         map({ cut($_); } $folder,address_show(unmime($Audit->from())),unmime($Audit->subject())),
 415                                         )
 416                         if $do{"syslog"} || $opt_dry;
 417         $folder=~s/;.*$//s;
 418         $folder="$Mail/".$' if $folder=~/^=/;
 419         push @AuditStored,$folder if $do{"did"};
 420         return if $store_ignore || $opt_dry;
 421         $DoBell++ if $do{"bell"};
 422         write_message($folder) or die;
 423         smssend_tryall $store_ignorenewmail,$do{"sms"},%args if $do{"sms"};
 424 }
 425
 426 our $did_last=0;
 427
 428 # no &$funcref=>did smth in this block
 429 # &$funcref,@funcargs
 430 sub did
 431 {
 432 my($funcref,@funcargs)=@_;
 433
 434         return @AuditStored!=$did_last if !$funcref;
 435         local $did_last=@AuditStored;
 436         &$funcref(@funcargs);
 437         return @AuditStored!=$did_last;
 438 }
 439
 440 # Never use Mail::Audit->store() as it will reformat MIME bodies and possibly corrupt OpenPGP!
 441 sub write_message
 442 {
 443 my($folder)=@_;
 444
 445         return 1 if $opt_dry;   # simulate OK
 446         local *F;
 447         open F,">>$folder" or do { warn "Append \"$folder\": $!"; return 0; };
 448         {
 449                 local $_;
 450                 ($_=Mail::Audit::audit_get_lock(\*F,$folder)) and do { warn "Lock \"$folder\": $!"; last; };
 451                 seek F,0,IO::Handle::SEEK_END or do { warn "Seek-end \"$folder\": $!"; last; };
 452                 # FIXME: Check for '^From ' to not to rely on our network peer
 453                 print F $Message or do { warn "Write to \"$folder\": $!"; last; };
 454                 do { print F "\n"; warn "Missing trailing newline, fixed"; } if $Message!~/\n$/s;
 455                 close F or do { warn "Close \"$folder\""; last; };
 456                 return 1;       # OK
 457                 }
 458         warn "MAIL DROPPED for folder: $folder";
 459         close F;
 460         return 0;       # failed
 461 }
 462
 463 sub process
 464 {
 465 my($message)=@_;
 466
 467         local $_=$_;
 468         my $save_=$_;
 469         $message=~s/(\n)(From )/$1>$2/sg;
 470         local $Message=$message;
 471         # Cannot call 'local' for our-imported variable:
 472         my $Audit_save=$Audit;
 473         $Audit=Mail::Audit->new(
 474                         "emergency"=>"$Mail/emergency",
 475                         "data"=>[map("$_\n",split("\n",$message))],
 476                         "log"=>"$HOME/.perlmail.log",
 477                         "loglevel"=>99,
 478                         );
 479         local @AuditStored=();
 480         do { smssend 0,$opt_smstest; return; } if $opt_smstest;
 481         write_message("$Mail/input") or die;
 482         PerlMail::Config::audit();
 483         warn 'Corrupted $_, repaired' if defined($save_)!=defined($_) || (defined($_) && $save_ ne $_);
 484         # restore:
 485         $Audit=$Audit_save;
 486 }
 487
 488 # utility functions:
 489
 490 # return: true (error-message or "1") if is spam
 491 sub spamassassin
 492 {
 493 my($cmd)=@_;
 494
 495         $cmd||="spamassassin --exit-code";
 496         # spamassassin has exit code 1 if IS spam, code 0 if NOT spam
 497         local *CHILD;
 498         local $SIG{"PIPE"}=sub { warn "spamassassin gave me SIGPIPE: broken pipe"; };
 499         # prevent Razor2's: Can't call method "log" on unblessed reference at Razor2/Client/Agent.pm line 212.
 500         local $ENV{"HOME"}=$HOME;
 501         # 2>/dev/null to prevent error messages to corrupt inetd() output of perlmail-accept(1)
 502         open CHILD,"|$cmd --mbox >/dev/null 2>/dev/null"
 503                         or return 0;
 504         print CHILD $Message;
 505         my $return=close CHILD;
 506         return undef() if !WIFEXITED($?);
 507         return undef() if  WIFSIGNALED($?);
 508         return undef() if  WIFSTOPPED($?);
 509         return 1       if  WEXITSTATUS($?);     # is-spam
 510         return 0;       # not-spam
 511 }
 512
 513 # NOTE: returns undef() if !wantarray and the first header is unrecognized
 514 # Returns also hosts
 515 sub Received_for
 516 {
 517         my @r=();
 518         for my $hdr ($Audit->head->get("Received")) {
 519                 my($for)=($hdr=~/\bfor\s+\<?(\S+)\>?\b/);
 520                 return $for if !wantarray();
 521                 push @r,$for if $for;
 522                 my($from,$fromaddr)=($hdr=~/\bfrom\s+(?:(\S+)\b.*?)??\[((?:\d{1,3}\.){3}\d{1,3})\]/);
 523                 $from=$fromaddr if !defined $from;
 524                 push @r,"$from:$fromaddr" if $from;
 525                 }
 526         return @r;
 527 }
 528
 529 # Extended Mail::Audit::MAPS
 530 # $domain,$full,[$timeout]
 531 sub dnsbl
 532 {
 533 my($domain,$full,$timeout)=@_;
 534
 535         $timeout||=30;  # sec
 536         $Mail::Audit::MAPS::host=$domain;
 537         my @hosts=map({ s/^.*://; "[$_]"; }     # strip DNS part
 538                         grep({ /^([^:@]*):/     # $1 is DNS name, $' is IP address
 539                                         && !$alternates_host{$1}        # leave only foreign hosts
 540                                         && !$dnsbl_whitelist{$'}; } (Received_for()))
 541                         );
 542         splice @hosts,1 if !$full && @hosts;    # "&& @hosts" to prevent: WARN: splice() offset past end of array
 543         {
 544                 package My::Audit::Faked;
 545                 sub received { return @{$_[0]->{"received"}}; }
 546                 }
 547         my $self_faked={
 548                         "received"=>[@hosts],
 549                         };
 550         bless $self_faked,"My::Audit::Faked";
 551         return Mail::Audit::rblcheck($self_faked,$timeout);
 552 }
 553
 554 sub muttrc_aliases
 555 {
 556         my %r=();
 557         for (muttrc()) {
 558                 next if !(my $key=(/^alias\s+(\S+)\s+/)[0]);
 559                 for my $addrobj (Mail::Address->parse($')) {
 560                         my $addr=$addrobj->address();
 561                         my $ref=\$r{"\L$addr"};
 562                         $$ref=$key if !$$ref;   # use always the first occurence to prefer nicks
 563                         }
 564                 }
 565         return %r;
 566 }
 567
 568 # FIXME: host may get multiple recipients and thus not showing "for <...>"
 569 # FIXME: muttrc_get("from") is too strict
 570 sub store_muttrc_alternates
 571 {
 572 my($prefix,$profile)=@_;
 573
 574         my $alternates=muttrc_get("alternates") or return;
 575         my $alternatesre=qr/$alternates/si;
 576         my $From=muttrc_get("from") or return;
 577         my $Fromre=qr/^\Q$From\E$/si;
 578         my $Fromobj=parseone $From or return;
 579         warn "'From' \"$From\" not matched by 'alternates': $alternatesre"
 580                         if $From!~/$alternates/si;
 581         for my $for (reverse Received_for()) {
 582                 $for=~s/:.*$//; # strip IP address here
 583                 my $forobj=parseone $for;
 584                 if ($forobj && $forobj->host()) {
 585                         # it is 'for' our primary address
 586                         next if lc($forobj->host()) eq lc($Fromobj->host());    # or 'return'? shouldn't matter
 587                         }
 588                 next if !$alternates_host{lc $for} && $for!~/$alternatesre/si;
 589                 store "$prefix\L$for",($profile || []);
 590                 return;
 591                 }
 592 }
 593
 594 # $header: ref CODE
 595 # $header: !ref => $Audit->get($header)
 596 # $maybeaddress: qr/regex/i
 597 # $maybeaddress: "string"
 598 # $maybeaddress: "<Regexp:regex>"       # hack :-(
 599 # $maybeaddress: "<user@host>"
 600 # $maybeaddress: "<user@>"
 601 # $maybeaddress: "<@host>"
 602 sub _headercore
 603 {
 604 my($re,$justone,$header,$maybeaddress)=@_;
 605
 606         if (ref $header) {
 607                 $header=join(",",&$header());
 608                 }
 609         else {
 610                 $header=$Audit->get($header);
 611                 }
 612         return 0 if !$header;
 613         return $header=~/$maybeaddress/i if "Regexp" eq ref $maybeaddress;
 614         return $header=~/$re/i if !defined(my $want=($maybeaddress=~/^\<(.*)\>$/)[0]);
 615         my @parsed=Mail::Address->parse($header);
 616         warn "'mailto:' forbidden in pattern: $want" if $want=~/^\Qmailto:\E/;
 617         return 0 if $justone && 1!=@parsed;
 618         return grep {
 619                            if ($want=~/^Regexp:/)
 620                                 { $_->address()=~/$'/i; }
 621                         elsif ($want=~/\@$/)
 622                                 { $_->user()   =~/^(?:\Qmailto:\E)?\Q$`\E/i; }
 623                         elsif ($want=~/^\@/)
 624                                 { $_->host()   =~/^\Q$'\E/i; }
 625                         else
 626                                 { $_->address()=~/^(?:\Qmailto:\E)?\Q$want\E/i; }
 627                         } @parsed;
 628 }
 629
 630 sub headerhas
 631 {
 632 my($header,$substr)=@_;
 633
 634         return _headercore(qr/\Q$substr\E/i,0,$header,$substr);
 635 }
 636
 637 sub headeris
 638 {
 639 my($header,$string)=@_;
 640
 641         return _headercore(qr/\Q$string\E/i,1,$header,$string);
 642 }
 643
 644 # $header,%$map
 645 sub header_remap
 646 {
 647 my($header,$map)=@_;
 648
 649         my $text=$Audit->get($header);
 650         my $orig=$text;
 651         while (my($from,$to)=each(%$map)) {
 652                 $text=~s/\b\Q$from\E\b/$to/gsi;
 653                 }
 654         return if $text eq $orig;
 655         $Audit->put_header("X-PerlMail-header_remap-$header",$orig);
 656         $Audit->replace_header($header,$text);
 657 }
 658
 659
 660 # MAIN
 661
 662 $Getopt::Long::ignorecase=0;
 663 die "GetOptions error" if !Getopt::Long::GetOptions(
 664                   "inetd"    ,sub { $opt_mode=\&inetd; },
 665                   "stdin"    ,sub { $opt_mode=\&stdin; },
 666                   "single!"  ,\$opt_single,
 667                   "dry"      ,\$opt_dry,
 668                   "smstest:s",sub { $opt_mode=\&stdin; $opt_smstest=($_[1] || 1); },
 669                   "idle!"    ,\$opt_idle,
 670                   "idletest" ,sub { syslogging_restore(); print((defined($_=useridle()) ? $_ : "<undef>")."\n"); exit 0; },
 671                   "muttrc"   ,sub { syslogging_restore(); print scalar muttrc(); exit 0; },
 672                 );
 673 # "Excessive arguments" checked in &inetd
 674 die "Missing mode" if !$opt_mode;
 675
 676 %alternates_host=map((lc($_)=>1),@alternates_host);
 677 %dnsbl_whitelist=map((   $_ =>1),@dnsbl_whitelist);
 678
 679 &$opt_mode();
 680 die "NOTREACHED";