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