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