perlmail-accept

   1 #! /usr/bin/perl
   2 #
   3 # $Id$
   4
   5 use vars qw($VERSION);
   6 $VERSION=do { my @r=(q$Revision$=~/\d+/g); sprintf "%d.".("%03d"x$#r),@r; };
   7 use strict;
   8 use warnings;
   9
  10
  11 INIT {
  12         require Sys::Syslog;
  13         Sys::Syslog::openlog("lacemail","pid","mail");
  14         my @syslogging_stack;
  15         sub syslogging_on_save
  16         {
  17                 push @syslogging_stack,$SIG{"__WARN__"},$SIG{"__DIE__" };
  18                 $SIG{"__WARN__"}=sub { Sys::Syslog::syslog("warning","WARN: %s",$_[0]); };      # disabled: print STDERR $_[0];
  19                 $SIG{"__DIE__" }=sub { Sys::Syslog::syslog("crit"   ,"DIE: %s" ,$_[0]); };
  20         }
  21         syslogging_on_save();
  22         sub syslogging_restore
  23         {
  24                 $SIG{"__DIE__" }=pop @syslogging_stack;
  25                 $SIG{"__WARN__"}=pop @syslogging_stack;
  26         }
  27         }
  28
  29
  30 use Mail::Audit qw(MAPS);
  31 require IO::Handle;
  32 use Carp qw(cluck confess);
  33 use POSIX qw(WIFEXITED WEXITSTATUS WIFSIGNALED WTERMSIG WIFSTOPPED WSTOPSIG);
  34 require POSIX;  # for ceil
  35 use User::Utmp;
  36 require File::Basename;
  37 use Getopt::Long;
  38 require Mail::Address;
  39 require MIME::Words;
  40 require Cz::Cstocs;
  41 require HTML::Entities;
  42 require MIME::Head;
  43 require Lingua::EN::Squeeze;
  44 require Mail::Mailer;
  45 require HTTP::Cookies;
  46 require HTTP::Request;
  47 require LWP::UserAgent;
  48 use URI::Escape 'uri_escape';
  49 require WWW::SMS;
  50
  51
  52 my $HOME="/home/lace";
  53 my $Mail="$HOME/Mail";
  54 my @ValidUsers=qw(root lace short kratochvil _local);
  55 my $IdleMax=10;
  56 my $MaxBodySMS=0x1000;  # max bytes to pass to Lingua::EN::Squeeze
  57 my $SMSmailError='short+err@ucw.cz';
  58 my @SMSwebRcpt=qw(420 602 431329);
  59 my $SMSwebRcpt_username="lace2";
  60 my $SMScontact='<short@ucw.cz>';
  61
  62 our($Message,$Audit,@AuditStored,$store_ignore,$store_ignorenewmail,$store_profile,$DoBell);
  63 our(%audit_profile,@sms_squeezes,@alternates_host,@dnsbl_whitelist);    # imported
  64 my %alternates_host;    # from @alternates_host
  65 my %dnsbl_whitelist;    # from @dnsbl_whitelist
  66
  67 # from RedHat "procmail-3.22-5"
  68 # /i should be only $procmailFROM_DAEMON but how it can hurt to /i all?
  69 our $procmailTO_        =qr'^((Original-)?(Resent-)?(To|Cc|Bcc)|(X-Envelope|Apparently(-Resent)?)-To):(.*[^-a-zA-Z0-9_.])?'mio;
  70 our $procmailTO         =qr'^((Original-)?(Resent-)?(To|Cc|Bcc)|(X-Envelope|Apparently(-Resent)?)-To):(.*[^a-zA-Z])?'mio;
  71 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;
  72 our $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;
  73 # perl-5.8.0 does not cope w/original FROM_MAILER on the third '?' character
  74 # Thus we did '([^>]*[^(.%@a-z0-9])?' -> '[^>]*\b', I hope it is somehow similiar
  75 # 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;
  76
  77 my $opt_mode;
  78 my $opt_smstest;        # 1 or $smscount
  79 my $opt_idle;
  80 my $opt_dry;
  81
  82
  83 sub process;
  84
  85 sub stdin
  86 {
  87         syslogging_restore();   # This is more a debugging session
  88         local $/="\n";
  89         my $message="";
  90         local $_;
  91         while (<>) {
  92                 die "Invalid 'From ' line: $_" if $message eq "" && !/^From /;
  93                 if (/^From / && $message) {
  94                         process $message;
  95                         $message="";
  96                         }
  97                 $message.=$_;
  98                 }
  99         process $message if $message;
 100         exit 0;
 101 }
 102
 103 # FIXME: separate 'lacemail'-transfer together with lacemail-submit away
 104 sub inetd
 105 {
 106         die "Excessive arguments" if @ARGV;
 107
 108         IO::Handle::autoflush STDOUT 1;
 109
 110         while (1) {
 111                 local $/="\n";
 112                 my $length=<STDIN>;
 113                 confess "Unexpected EOF" if !defined $length;
 114                 confess "Missing EOL" if $length!~s/\n$//s;
 115                 exit 0 if $length eq "BYE";
 116                 confess "Unrecognized length: $length" if $length!~/^\d+$/;
 117                 my $message;
 118                 local $_;
 119                 $length==($_=read STDIN,$message,$length) or confess "Got $_ out of required $length bytes";
 120                 $length==length $message or confess "False read return ".length($message)." instead of $length";
 121                 {
 122                         local *STDOUT;
 123                         local *STDERR;
 124                         local $DoBell=0;
 125                         process $message;
 126                         if ($DoBell) {
 127                                 bell() or warn "Unable to BELL";
 128                                 }
 129                         }
 130                 print STDOUT "1";
 131                 }
 132         die "NOTREACHED";
 133 }
 134
 135 sub bell
 136 {
 137         local *BELL;
 138         open BELL,">/dev/tty11" or return 0;
 139         print BELL "\x07";
 140         close BELL or return 0;
 141         return 1;
 142 }
 143
 144 sub useridle
 145 {
 146         return 0 if ! -e "$HOME/away";
 147         my %valid_users=map(($_=>1),@ValidUsers);
 148         my($idlebest,$linebest);
 149         for my $utmp (User::Utmp::getut(),{ "ut_line"=>"psaux" }) {
 150                 local $_;
 151                 next if defined($_=$utmp->{"ut_type"}) && $_!=User::Utmp::USER_PROCESS;
 152                 next if defined($_=$utmp->{"ut_user"}) && !$valid_users{$_};
 153                 my $line="/dev/".$utmp->{"ut_line"};
 154                 my $atime=(stat $line)[8];
 155                 my $what="user \"".($utmp->{"ut_user"} || "<local>")."\", line \"$line\"";
 156                 warn "Unable to stat $what" and next if !$atime;
 157                 my $idle=time()-$atime;
 158                 warn "atime in future for $what" and next if $idle<0;
 159                 next if $idle>$IdleMax;
 160                 next if defined $idlebest && $idlebest<=$idle;
 161                 $idlebest=$idle;
 162                 $linebest=$line;
 163                 }
 164         return !wantarray() ? $idlebest : ($idlebest,$linebest);
 165 }
 166
 167 # return only the very (recursive) first part
 168 sub body_first
 169 {
 170         return $Audit if !$Audit->is_mime();
 171         my $first=$Audit;
 172         local $_;
 173         $first=$_ while $_=$first->parts(0);
 174         return $first;
 175 }
 176
 177 sub mimehead
 178 {
 179 my($part)=@_;
 180
 181         return $Audit->is_mime() ? $part->head()
 182                         : MIME::Head->new([ split "\n",$Audit->head()->as_string() ])
 183                         ;
 184 }
 185
 186 sub mimebody
 187 {
 188 my($part)=@_;
 189
 190         # be vary cautious here as most of $part methods will encode it!
 191         return join "",@{$Audit->body()} if !$Audit->is_mime();
 192         my $bodyhandle=$part->bodyhandle();
 193         # If MIME is corrupted we don't get bodyhandle() for this part
 194         # It may occur when "boundary" is specified by header but no such boundary is found in the body
 195         return $bodyhandle->as_string() if $bodyhandle;
 196         warn "MIME corrupted, adapting";
 197         return $part->body_as_string();
 198 }
 199
 200 sub mime_type
 201 {
 202 my($part)=@_;
 203
 204         return $Audit->is_mime() ? $part->effective_type() : mimehead($part)->mime_type();
 205 }
 206
 207 sub body_simple
 208 {
 209         my $first=body_first();
 210         my $r=mimebody($first);
 211         my $mime_type=mime_type($first);
 212            if ($mime_type eq "text/html") {
 213                 # HTML::FormatText just does a useless text layouts
 214                 # PerlIO::via::StripHTML probably needs PerlIO input (?)
 215                 $r=~s/<[^>]*>//gs;
 216                 $r=HTML::Entities::decode($r);
 217                 # FIXME: detect charset from <meta> tag: "Content-type: text/html; charset=<???>"
 218                 }
 219         elsif ($mime_type eq "application/pgp-encrypted"
 220                && (my $filename=mimehead($first)->mime_attr("Content-Disposition.filename"))
 221                ) {
 222                 # first part contains just "Version: 1" as of GnuPG v1.0.4 (GNU/Linux)
 223                 $r="pgp($filename)";
 224                 }
 225         if ((my $charset=mimehead($first)->mime_attr("Content-Type.charset"))) {
 226                 my $cstocs=Cz::Cstocs->new($charset,"ascii");
 227                 $r=&$cstocs($r) if $cstocs;     # charset may be unknown
 228                 }
 229         return $r;
 230 }
 231
 232 sub parts_linear
 233 {
 234 my($part)=@_;
 235
 236         return $Audit if !$part && !$Audit->is_mime();
 237         $part||=$Audit;
 238         # don't use '!$part->parts()' as even 0-parts-multiparts are still multiparts
 239         return $part if $part->bodyhandle();
 240         return map { (parts_linear($_)); } $part->parts();
 241 }
 242
 243 sub smsbuild
 244 {
 245 my($smsi,$smscount)=@_;
 246
 247         return "$smsi/$smscount:" if $smscount>1;
 248         return "";
 249 }
 250
 251 sub smslens
 252 {
 253 my($ignorenewmail,$smscount,%args)=@_;
 254
 255         return map({
 256                         my $l=160;
 257                         if (!$ignorenewmail) {  # send by mail
 258                                 $l-=length("Z emailu $SMSmailError: ");
 259                                 $l-=length(smsbuild($_,$smscount));
 260                                 }
 261                         else {  # send by web
 262                                 $l-=6;  # 154 is the max length before split; why?
 263                                 }
 264                         $l;
 265                         } (0..$smscount-1));
 266 }
 267
 268 sub smssend_web
 269 {
 270 my($squeezed,$smscount,@lens)=@_;
 271
 272         $smscount=POSIX::ceil($smscount/5);
 273         for my $smsi (0..$smscount-1) {
 274                 my $len=$lens[$smsi];
 275                 $squeezed=~/^.{0,$len}/s;
 276                 my $frag=$&;
 277                 $squeezed=$';
 278                 return 0 if 3!=@SMSwebRcpt;
 279                 local *F;
 280                 open F,"$HOME/priv/WWW-SMS-$SMSwebRcpt_username.pwd" or return 0;
 281                 my $pwd=<F>;
 282                 chomp $pwd;
 283                 close F;
 284                 my $sms=WWW::SMS->new(@SMSwebRcpt,$frag,"username"=>$SMSwebRcpt_username,"passwd"=>$pwd);
 285                 for ($sms->gateways("sorted"=>"reliability")) {
 286                         last if $sms->send($_);
 287                         Sys::Syslog::syslog("warning","Web SMS send failed: %s",$WWW::SMS::Error);
 288                         my $void=$WWW::SMS::Error;      # Prevent: Name "WWW::SMS::Error" used only once
 289                         }
 290                 }
 291         return 1;
 292 }
 293
 294 sub smssend_mail
 295 {
 296 my($squeezed,$smscount,@lens)=@_;
 297
 298         return 0;
 299 }
 300
 301 sub smssend
 302 {
 303 my($ignorenewmail,$smscount,%args)=@_;
 304
 305         my $text=audit_sms(
 306                         "subject"=>unmime($Audit->subject()),
 307                         "from"=>[ Mail::Address->parse(unmime($Audit->from())) ],
 308                         "body"=>substr(body_simple(),0,$MaxBodySMS*(1+0.25*$smscount)),
 309                         %args);
 310         my $texthead="";
 311         ($texthead,$text)=@$text if ref $text;
 312         do { print "$texthead\n$text\n"; return; } if $opt_smstest;
 313         my @lens=smslens($ignorenewmail,$smscount,%args);
 314         my $maxlen=0;
 315         $maxlen+=$_ for (@lens);
 316         my $squeezed;
 317         for my $squeeze (@sms_squeezes) {
 318                 local $_;
 319                  Lingua::EN::Squeeze::SqueezeControl($_)    if defined ($_=$squeeze->{"SqueezeControl"});
 320                 $Lingua::EN::Squeeze::SQZ_OPTIMIZE_LEVEL or 1;  # prevent: Name "$_" used only once: possible typo
 321                 $Lingua::EN::Squeeze::SQZ_OPTIMIZE_LEVEL=$_ if defined ($_=$squeeze->{"SQZ_OPTIMIZE_LEVEL"});
 322                 $squeezed=Lingua::EN::Squeeze::SqueezeText($text);
 323                 chomp $squeezed;
 324                 last if $maxlen>=length($texthead.$squeezed);
 325                 }
 326         $squeezed=substr $texthead.$squeezed,0,$maxlen; # strip if we passed thru last for() above
 327         my $recalclen=0;
 328         for ($smscount=0;$recalclen<length $squeezed;$smscount++) {
 329                 $recalclen+=$lens[$smscount];
 330                 }
 331         my $func=($ignorenewmail ? \&smssend_web : \&smssend_mail);
 332         &$func($squeezed,$smscount,@lens);
 333 }
 334
 335 sub smssend_tryall
 336 {
 337 my($ignorenewmail,@args)=@_;
 338
 339         return if !$opt_smstest && !$opt_idle && defined useridle();
 340         local $_;
 341         return $_ if                     $_=smssend(1,@args);   # web
 342         return $_ if !$ignorenewmail && ($_=smssend(0,@args));  # mail
 343         warn "Unable to SMSsend the mail";
 344         return 0;
 345 }
 346
 347 sub cut
 348 {
 349         local $_=$_[0];
 350         return "<???>" if !defined($_) || /^\s*$/s;
 351         s/^\s*//s;
 352         s/\s*$//s;
 353         return $_ if length($_)<128;
 354         return substr($_,0,128)."...";
 355 }
 356
 357 our $profile_eval_depth=0;
 358 # ($name || @$name)
 359 sub profile_eval
 360 {
 361 my($name)=@_;
 362
 363         die "Nesting profile: $name" if 0x10<=(local $profile_eval_depth=$profile_eval_depth+1);
 364         return @$name if ref $name;
 365         die "Profile not found: $name" if !exists $audit_profile{$name};
 366         my @this=@{$audit_profile{$name}};
 367         return (profile_eval($'),@this[1..$#this]) if $this[0] && $this[0]=~/^=/;
 368         return @this;
 369 }
 370
 371 sub address_show
 372 {
 373 my($text)=@_;
 374
 375         return join(",",map({ $_->name() or $_->address(); } Mail::Address->parse($text)));
 376 }
 377
 378 sub unmime
 379 {
 380 my($text)=@_;
 381
 382         return join "",map({
 383                         my $cstocs;
 384                         for (${$_}[1],"iso-8859-2") {
 385                                 last if $_ && ($cstocs=Cz::Cstocs->new($_,"ascii"));
 386                                 }
 387                         &$cstocs(${$_}[0]);
 388                         } MIME::Words::decode_mimewords($text));
 389 }
 390
 391 # $folder: "$folder; comment"
 392 # $profile as profile_eval($name)
 393 sub store
 394 {
 395 my($folder,$profile,%args)=@_;
 396
 397         $profile=$store_profile if !$profile;
 398         my %do=map({ (!/=/ ? ($_=>1) : ($`=>$')); } profile_eval($profile));
 399         Sys::Syslog::syslog("info","%s%s%s: %s: %s",
 400                                         (!$opt_dry ? "" : "--dry: "),
 401                                         (!$store_ignore ? "" : "IGNORED[$store_ignore]: "),
 402                                         map({ cut($_); } $folder,address_show(unmime($Audit->from())),unmime($Audit->subject())),
 403                                         )
 404                         if $do{"syslog"} || $opt_dry;
 405         $folder=~s/;.*$//s;
 406         $folder="$Mail/".$' if $folder=~/^=/;
 407         push @AuditStored,$folder if $do{"did"};
 408         return if $store_ignore || $opt_dry;
 409         $DoBell++ if $do{"bell"};
 410         write_message($folder) or die;
 411         smssend_tryall $store_ignorenewmail,$do{"sms"},%args if $do{"sms"};
 412 }
 413
 414 our $did_last=0;
 415
 416 # no &$funcref=>did smth in this block
 417 # &$funcref,@funcargs
 418 sub did
 419 {
 420 my($funcref,@funcargs)=@_;
 421
 422         return @AuditStored!=$did_last if !$funcref;
 423         local $did_last=@AuditStored;
 424         &$funcref(@funcargs);
 425         return @AuditStored!=$did_last;
 426 }
 427
 428 # Never use Mail::Audit->store() as it will reformat MIME bodies and possibly corrupt OpenPGP!
 429 sub write_message
 430 {
 431 my($folder)=@_;
 432
 433         return if $opt_dry;
 434         local *F;
 435         open F,">>$folder" or do { warn "Append \"$folder\": $!"; return 0; };
 436         {
 437                 local $_;
 438                 ($_=Mail::Audit::audit_get_lock(\*F,$folder)) and do { warn "Lock \"$folder\": $!"; last; };
 439                 seek F,0,IO::Handle::SEEK_END or do { warn "Seek-end \"$folder\": $!"; last; };
 440                 # FIXME: Check for '^From ' to not to rely on our network peer
 441                 print F $Message or do { warn "Write to \"$folder\": $!"; last; };
 442                 do { print F "\n"; warn "Missing trailing newline, fixed"; } if $Message!~/\n$/s;
 443                 close F or do { warn "Close \"$folder\""; last; };
 444                 return 1;       # OK
 445                 }
 446         warn "MAIL DROPPED for folder: $folder";
 447         close F;
 448         return 0;       # failed
 449 }
 450
 451 sub process
 452 {
 453 my($message)=@_;
 454
 455         local $_=$_;
 456         my $save_=$_;
 457         local $Message=$message;
 458         local $Audit=Mail::Audit->new(
 459                         "emergency"=>"$Mail/emergency",
 460                         "data"=>[map("$_\n",split("\n",$message))],
 461                         "log"=>"$HOME/.lacemail.log",
 462                         "loglevel"=>99,
 463                         );
 464         local @AuditStored=();
 465         do { smssend 0,$opt_smstest; return; } if $opt_smstest;
 466         write_message("$Mail/input") or die;
 467         audit();
 468         warn 'Corrupted $_, repaired' if defined($save_)!=defined($_) || (defined($_) && $save_ ne $_);
 469 }
 470
 471 # utility functions:
 472
 473 # return: true (error-message or "1") if is spam
 474 sub razor2
 475 {
 476         # razor-check has exit code 1 if NOT spam, code 0 if IS spam
 477         local *CHILD;
 478         local $SIG{"PIPE"}=sub { warn "razor2 gave me SIGPIPE: broken pipe"; };
 479         # prevent Razor2's: Can't call method "log" on unblessed reference at Razor2/Client/Agent.pm line 212.
 480         local $ENV{"HOME"}=$HOME;
 481         open CHILD,'|'
 482                                         .'('.'(razor-check 2>&1;echo >&3 $?)'
 483                                                         .'|sed "s/^/razor-check: /"'
 484                                                         .'|logger -t "lacemail['.$$.']" -p mail.crit'
 485                                                         .') 3>&1'
 486                                         .'|exit `cat`'
 487                         or return 0;
 488         print CHILD $Message;
 489         my $return;
 490         {
 491                 local $/=undef();
 492                 $return=<CHILD> || 1;
 493                 }
 494         close CHILD;
 495         return undef() if !WIFEXITED($?);
 496         return undef() if  WIFSIGNALED($?);
 497         return undef() if  WIFSTOPPED($?);
 498         return undef() if WEXITSTATUS($?);
 499         return $return; # is-spam
 500 }
 501
 502 # NOTE: returns undef() if !wantarray and the first header is unrecognized
 503 # Returns also hosts
 504 sub Received_for
 505 {
 506         my @r=();
 507         for my $hdr ($Audit->head->get("Received")) {
 508                 my($for)=($hdr=~/\bfor\s+\<?(\S+)\>?\b/);
 509                 return $for if !wantarray();
 510                 push @r,$for if $for;
 511                 my($from,$fromaddr)=($hdr=~/\bfrom\s+(?:(\S+)\b.*?)??\[((?:\d{1,3}\.){3}\d{1,3})\]/);
 512                 $from=$fromaddr if !defined $from;
 513                 push @r,"$from:$fromaddr" if $from;
 514                 }
 515         return @r;
 516 }
 517
 518 # Extended Mail::Audit::MAPS
 519 # $domain,$full,[$timeout]
 520 sub dnsbl
 521 {
 522 my($domain,$full,$timeout)=@_;
 523
 524         $timeout||=30;  # sec
 525         $Mail::Audit::MAPS::host=$domain;
 526         my @hosts=map({ s/^.*://; "[$_]"; }     # strip DNS part
 527                         grep({ /^([^:@]*):/     # $1 is DNS name, $' is IP address
 528                                         && !$alternates_host{$1}        # leave only foreign hosts
 529                                         && !$dnsbl_whitelist{$'}; } (Received_for()))
 530                         );
 531         splice @hosts,1 if !$full && @hosts;    # "&& @hosts" to prevent: WARN: splice() offset past end of array
 532         {
 533                 package My::Audit::Faked;
 534                 sub received { return @{$_[0]->{"received"}}; }
 535                 }
 536         my $self_faked={
 537                         "received"=>[@hosts],
 538                         };
 539         bless $self_faked,"My::Audit::Faked";
 540         return Mail::Audit::rblcheck($self_faked,$timeout);
 541 }
 542
 543 our %muttrc_pending=();
 544 sub muttrc
 545 {
 546 my($muttrc)=@_;
 547
 548         $muttrc||="$HOME/.muttrc";
 549         $muttrc=~s/^\~/$HOME/;
 550         do { warn "Looping muttrc, ignoring: $muttrc"; return (); } if $muttrc_pending{$muttrc};
 551         local $muttrc_pending{$muttrc}=1;
 552         local *MUTTRC;
 553         open MUTTRC,$muttrc or do { warn "open \"$muttrc\": $!"; return (); };
 554         local $/="\n";
 555         local $_;
 556         my @r=();
 557         # far emulation mutt/init.c/mutt_parse_rc_line()
 558         while (<MUTTRC>) {
 559                 s/^[\s;]*//s;
 560                 s/[#;].*$//s;
 561                 s/\s*$//s;
 562                 next if !/^(\S+)\s*/s;
 563                 if ($1 eq "source") {
 564                         $_=$';
 565                         do { warn "Wrong 'source' parameters at $muttrc:$.: $_"; next; } if !/^\S+$/;
 566                         push @r,muttrc($_);
 567                         next;
 568                         }
 569                 push @r,$_;
 570                 }
 571         close MUTTRC or warn "close \"$muttrc\": $!";
 572         return wantarray() ? @r : join("",map("$_\n",@r));
 573 }
 574
 575 my %mutteval_charmap=(          # WARNING: Don't use "" or "0" here, see below for "|| warn"!
 576                 '\\'=>"\\",
 577                 'r'=>"\r",
 578                 'n'=>"\n",
 579                 't'=>"\t",
 580                 'f'=>"\f",
 581                 'e'=>"\e",
 582                 );
 583 # mutt/init.c/mutt_extract_token()
 584 sub mutteval
 585 {
 586         local $_=$_[0];
 587         return $_ if !s/^"//;
 588         do { warn "Missing trailing quote in: $_"; return $_; } if !s/"$//;
 589         s/\\(.)/$mutteval_charmap{$1} || warn "Undefined '\\$1' sequence in: $_";/ges;
 590         return $_;
 591 }
 592
 593 sub muttrc_get
 594 {
 595 my(@headers)=@_;
 596
 597         my @r=map({ (ref $_ ? $_ : qr/^\s*set\s+\Q$_\E\s*=\s*(.*?)\s*$/si); } @headers);
 598         my %r=map(($_=>undef()),@r);
 599         for (muttrc()) {
 600                 for my $ritem (@r) {
 601                         /$ritem/si or next;
 602                         $r{$ritem}=mutteval $1;
 603                         }
 604                 }
 605         for my $var (grep { !defined($r{$_}) } @r) {
 606                 warn "Variable '$var' not found in muttrc";
 607                 return undef();
 608                 }
 609         return wantarray() ? %r : $r{$r[0]};
 610 }
 611
 612 sub muttrc_aliases
 613 {
 614         my %r=();
 615         for (muttrc()) {
 616                 next if !(my $key=(/^alias\s+(\S+)\s+/)[0]);
 617                 for my $addrobj (Mail::Address->parse($')) {
 618                         my $addr=$addrobj->address();
 619                         my $ref=\$r{"\L$addr"};
 620                         $$ref=$key if !$$ref;   # use always the first occurence to prefer nicks
 621                         }
 622                 }
 623         return %r;
 624 }
 625
 626 # FIXME: Unify
 627 # BEGIN lacemail-sendmail
 628 # return: Mail::Address instance or undef()
 629 sub parseone
 630 {
 631 my($line)=@_;
 632
 633         return undef() if !defined $line;
 634         my @r=Mail::Address->parse($line);
 635         warn "Got ".scalar(@r)." addresses while wanting just one; when parsing: $line" if 1!=@r;
 636         return $r[0];
 637 }
 638 # END lacemail-sendmail
 639
 640 # FIXME: host may get multiple recipients and thus not showing "for <...>"
 641 # FIXME: muttrc_get("from") is too strict
 642 sub store_muttrc_alternates
 643 {
 644 my($prefix,$profile)=@_;
 645
 646         my $alternates=muttrc_get("alternates") or return;
 647         my $alternatesre=qr/$alternates/si;
 648         my $From=muttrc_get("from") or return;
 649         my $Fromre=qr/^\Q$From\E$/si;
 650         my $Fromobj=parseone $From or return;
 651         warn "'From' \"$From\" not matched by 'alternates': $alternatesre"
 652                         if $From!~/$alternates/si;
 653         for my $for (reverse Received_for()) {
 654                 $for=~s/:.*$//; # strip IP address here
 655                 if ($Fromobj->user() ne "prog-mutt") {
 656                         next if lc($for) eq lc($From);
 657                         }
 658                 else {
 659                         my $forobj=parseone $for;
 660                         if ($forobj && $forobj->host()) {
 661                                 # it is 'for' our primary address
 662                                 next if lc($forobj->host()) eq lc($Fromobj->host());    # or 'return'? shouldn't matter
 663                                 }
 664                         }
 665                 next if !$alternates_host{lc $for} && $for!~/$alternatesre/si;
 666                 store "$prefix\L$for",($profile || []);
 667                 return;
 668                 }
 669 }
 670
 671 # $header: ref CODE
 672 # $header: !ref => $Audit->get($header)
 673 # $maybeaddress: qr/regex/i
 674 # $maybeaddress: "string"
 675 # $maybeaddress: "<Regexp:regex>"       # hack :-(
 676 # $maybeaddress: "<user@host>"
 677 # $maybeaddress: "<user@>"
 678 # $maybeaddress: "<@host>"
 679 sub _headercore
 680 {
 681 my($re,$justone,$header,$maybeaddress)=@_;
 682
 683         if (ref $header) {
 684                 $header=join(",",&$header());
 685                 }
 686         else {
 687                 $header=$Audit->get($header);
 688                 }
 689         return 0 if !$header;
 690         return $header=~/$maybeaddress/i if "Regexp" eq ref $maybeaddress;
 691         return $header=~/$re/i if !defined(my $want=($maybeaddress=~/^\<(.*)\>$/)[0]);
 692         my @parsed=Mail::Address->parse($header);
 693         warn "'mailto:' forbidden in pattern: $want" if $want=~/^\Qmailto:\E/;
 694         return 0 if $justone && 1!=@parsed;
 695         return grep {
 696                            if ($want=~/^Regexp:/)
 697                                 { $_->address()=~/$'/i; }
 698                         elsif ($want=~/\@$/)
 699                                 { $_->user()   =~/^(?:\Qmailto:\E)?\Q$`\E/i; }
 700                         elsif ($want=~/^\@/)
 701                                 { $_->host()   =~/^\Q$'\E/i; }
 702                         else
 703                                 { $_->address()=~/^(?:\Qmailto:\E)?\Q$want\E/i; }
 704                         } @parsed;
 705 }
 706
 707 sub headerhas
 708 {
 709 my($header,$substr)=@_;
 710
 711         return _headercore(qr/\Q$substr\E/i,0,$header,$substr);
 712 }
 713
 714 sub headeris
 715 {
 716 my($header,$string)=@_;
 717
 718         return _headercore(qr/\Q$string\E/i,1,$header,$string);
 719 }
 720
 721 # $header,%$map
 722 sub header_remap
 723 {
 724 my($header,$map)=@_;
 725
 726         my $text=$Audit->get($header);
 727         my $orig=$text;
 728         while (my($from,$to)=each(%$map)) {
 729                 $text=~s/\b\Q$from\E\b/$to/gsi;
 730                 }
 731         return if $text eq $orig;
 732         $Audit->put_header("X-LaceMail-header_remap-$header",$orig);
 733         $Audit->replace_header($header,$text);
 734 }
 735
 736
 737 # MAIN
 738
 739 my $basedir=File::Basename::dirname($0);
 740 $Getopt::Long::ignorecase=0;
 741 die "GetOptions error" if !Getopt::Long::GetOptions(
 742                   "inetd"    ,sub { $opt_mode=\&inetd; },
 743                   "stdin"    ,sub { $opt_mode=\&stdin; },
 744                   "dry"      ,\$opt_dry,
 745                   "smstest:s",sub { $opt_mode=\&stdin; $opt_smstest=($_[1] || 1); },
 746                   "idle!"    ,\$opt_idle,
 747                   "idletest" ,sub { syslogging_restore(); print((defined($_=useridle()) ? $_ : "<undef>")."\n"); exit 0; },
 748                   "muttrc"   ,sub { syslogging_restore(); print scalar muttrc(); exit 0; },
 749                 "d|basedir=s",\&basedir,
 750                 );
 751 # "Excessive arguments" checked in &inetd
 752 die "Missing mode" if !$opt_mode;
 753
 754 my $filenameMyAudit="$basedir/My-Audit.pm";
 755 open AUDIT,$filenameMyAudit or die "open \"$filenameMyAudit\": $!";
 756 {
 757         local $/=undef();
 758         eval <AUDIT> or die "eval \"$filenameMyAudit\": $@";
 759         audit_init();
 760         %alternates_host=map((lc($_)=>1),@alternates_host);
 761         %dnsbl_whitelist=map((   $_ =>1),@dnsbl_whitelist);
 762         }
 763 close AUDIT or warn "close \"$filenameMyAudit\": $!";
 764
 765 &$opt_mode();
 766 die "NOTREACHED";