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($0);
  49
  50         # FIXME:
  51         use lib "/home/lace/lib/perl5/site_perl/5.10.0";
  52         use lib "/home/lace/lib64/perl5/site_perl/5.10.0/x86_64-linux-thread-multi";
  53
  54         use PerlMail::Config;
  55         use PerlMail::Lib;
  56         }
  57
  58 use Mail::Audit qw(MAPS);
  59 require IO::Handle;
  60 use Carp qw(cluck confess);
  61 use POSIX qw(WIFEXITED WEXITSTATUS WIFSIGNALED WTERMSIG WIFSTOPPED WSTOPSIG);
  62 require POSIX;  # for ceil
  63 use User::Utmp;
  64 use Getopt::Long;
  65 require Mail::Address;
  66 require MIME::Words;
  67 require Cz::Cstocs;
  68 require HTML::Entities;
  69 require MIME::Head;
  70 require Lingua::EN::Squeeze;
  71 require Mail::Mailer;
  72 require HTTP::Cookies;
  73 require HTTP::Request;
  74 require LWP::UserAgent;
  75 use URI::Escape 'uri_escape';
  76 require WWW::SMS;
  77 #require Authen::SASL;  # Sanity check for &Net::SMTP::auth
  78 use MIME::Base64;
  79 use IPC::Open3;
  80 use POSIX ":sys_wait_h";
  81
  82
  83 our($Message,@AuditStored,$DoBell,$Dry);
  84 my %alternates_host;    # from @alternates_host
  85 my %dnsbl_whitelist;    # from @dnsbl_whitelist
  86
  87 # from RedHat "procmail-3.22-5"
  88 # /i should be only $procmailFROM_DAEMON but how it can hurt to /i all?
  89 our $procmailTO_        =qr'^((Original-)?(Resent-)?(To|Cc|Bcc)|(X-Envelope|Apparently(-Resent)?)-To):(.*[^-a-zA-Z0-9_.])?'mio;
  90 our $procmailTO         =qr'^((Original-)?(Resent-)?(To|Cc|Bcc)|(X-Envelope|Apparently(-Resent)?)-To):(.*[^a-zA-Z])?'mio;
  91 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;
  92 $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;
  93 # perl-5.8.0 does not cope w/original FROM_MAILER on the third '?' character
  94 # Thus we did '([^>]*[^(.%@a-z0-9])?' -> '[^>]*\b', I hope it is somehow similiar
  95 # 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;
  96
  97 my $opt_mode;
  98 my $opt_smstest;        # 1 or $smscount
  99 my $opt_idle;
 100 my $opt_single;
 101
 102
 103 sub process;
 104
 105 sub stdin
 106 {
 107         syslogging_restore();   # This is more a debugging session
 108         local $/="\n";
 109         my $message="";
 110         local $_;
 111         while (<>) {
 112                 die "Invalid 'From ' line: $_" if $message eq "" && !/^From /;
 113                 if (!$opt_single && /^From / && $message) {
 114                         process $message;
 115                         $message="";
 116                         }
 117                 $message.=$_;
 118                 }
 119         process $message if $message;
 120         exit 0;
 121 }
 122
 123 # FIXME: separate 'perlmail'-transfer together with perlmail-submit away
 124 sub inetd
 125 {
 126         die "Excessive arguments" if @ARGV;
 127
 128         IO::Handle::autoflush STDOUT 1;
 129
 130         while (1) {
 131                 local $/="\n";
 132                 $!=undef();
 133                 my $length=<STDIN>;
 134                 confess "Unexpected EOF: $!" if !defined $length;
 135                 confess "Missing EOL" if $length!~s/\n$//s;
 136                 exit 0 if $length eq "BYE";
 137                 confess "Unrecognized length: $length" if $length!~/^\d+$/;
 138                 my $message;
 139                 local $_;
 140                 $length==($_=read STDIN,$message,$length) or confess "Got $_ out of required $length bytes";
 141                 $length==length $message or confess "False read return ".length($message)." instead of $length";
 142                 {
 143                         # Do not: local *STDOUT;        # FIXME: fd's inherited by spawned processes are not closed this way!
 144                         #         local *STDERR;        # FIXME: fd's inherited by spawned processes are not closed this way!
 145                         # as IPC::Open3 and IPC::Open2 will not redirect the output
 146                         # and send it to the original socket instead!
 147                         local $DoBell=0;
 148                         process $message;
 149                         if ($DoBell) {
 150                                 bell() or warn "Unable to BELL";
 151                                 }
 152                         }
 153                 print STDOUT "1";
 154                 }
 155         die "NOTREACHED";
 156 }
 157
 158 sub bell
 159 {
 160         local *BELL;
 161         open BELL,">/dev/tty11" or return 0;
 162         print BELL "\x07";
 163         close BELL or return 0;
 164         return 1;
 165 }
 166
 167 sub useridle
 168 {
 169         return 0 if ! -e "$HOME/away";
 170         my %valid_users=map(($_=>1),@ValidUsers);
 171         my($idlebest,$linebest);
 172         for my $utmp (User::Utmp::getut(),{ "ut_line"=>"psaux" }) {
 173                 local $_;
 174                 next if defined($_=$utmp->{"ut_type"}) && $_!=User::Utmp::USER_PROCESS();
 175                 next if defined($_=$utmp->{"ut_user"}) && !$valid_users{$_};
 176                 my $line="/dev/".$utmp->{"ut_line"};
 177                 my $atime=(stat $line)[8];
 178                 my $what="user \"".($utmp->{"ut_user"} || "<local>")."\", line \"$line\"";
 179                 warn "Unable to stat $what" and next if !$atime;
 180                 my $idle=time()-$atime;
 181                 warn "atime in future for $what" and next if $idle<0;
 182                 next if $idle>$IdleMax;
 183                 next if defined $idlebest && $idlebest<=$idle;
 184                 $idlebest=$idle;
 185                 $linebest=$line;
 186                 }
 187         return !wantarray() ? $idlebest : ($idlebest,$linebest);
 188 }
 189
 190 # return only the very (recursive) first part
 191 sub body_first
 192 {
 193         return $Audit if !$Audit->is_mime();
 194         my $first=$Audit;
 195         local $_;
 196         $first=$_ while $_=$first->parts(0);
 197         return $first;
 198 }
 199
 200 sub is_multipart
 201 {
 202         return 0 if !$Audit->is_mime();
 203         return $Audit->is_multipart();
 204 }
 205
 206 sub mimehead
 207 {
 208 my($part)=@_;
 209
 210         return $Audit->is_mime() ? $part->head()
 211                         : MIME::Head->new([ split "\n",$Audit->head()->as_string() ])
 212                         ;
 213 }
 214
 215 sub mimebody
 216 {
 217 my($part)=@_;
 218
 219         # be vary cautious here as most of $part methods will encode it!
 220         return join "",@{$Audit->body()} if !$Audit->is_mime();
 221         my $bodyhandle=$part->bodyhandle();
 222         # If MIME is corrupted we don't get bodyhandle() for this part
 223         # It may occur when "boundary" is specified by header but no such boundary is found in the body
 224         return $bodyhandle->as_string() if $bodyhandle;
 225         warn "MIME corrupted, adapting";
 226         return $part->body_as_string();
 227 }
 228
 229 sub mime_type
 230 {
 231 my($part)=@_;
 232
 233         return $Audit->is_mime() ? $part->effective_type() : mimehead($part)->mime_type();
 234 }
 235
 236 sub body_simple
 237 {
 238         my $first=body_first();
 239         my $r=mimebody($first);
 240         my $mime_type=mime_type($first);
 241            if ($mime_type eq "text/html") {
 242                 # HTML::FormatText just does a useless text layouts
 243                 # PerlIO::via::StripHTML probably needs PerlIO input (?)
 244                 $r=~s/<[^>]*>//gs;
 245                 $r=HTML::Entities::decode($r);
 246                 # FIXME: detect charset from <meta> tag: "Content-type: text/html; charset=<???>"
 247                 }
 248         elsif ($mime_type eq "application/pgp-encrypted"
 249                && (my $filename=mimehead($first)->mime_attr("Content-Disposition.filename"))
 250                ) {
 251                 # first part contains just "Version: 1" as of GnuPG v1.0.4 (GNU/Linux)
 252                 $r="pgp($filename)";
 253                 }
 254         if ((my $charset=mimehead($first)->mime_attr("Content-Type.charset"))) {
 255                 my $cstocs=Cz::Cstocs->new($charset,"ascii");
 256                 $r=&$cstocs($r) if $cstocs;     # charset may be unknown
 257                 }
 258         return $r;
 259 }
 260
 261 sub parts_linear
 262 {
 263 my($part)=@_;
 264
 265         return $Audit if !$part && !$Audit->is_mime();
 266         $part||=$Audit;
 267         # don't use '!$part->parts()' as even 0-parts-multiparts are still multiparts
 268         return $part if $part->bodyhandle();
 269         return map { (parts_linear($_)); } $part->parts();
 270 }
 271
 272 sub smsbuild
 273 {
 274 my($smsi,$smscount)=@_;
 275
 276         return "$smsi/$smscount:" if $smscount>1;
 277         return "";
 278 }
 279
 280 sub smslens
 281 {
 282 my($ignorenewmail,$smscount,%args)=@_;
 283
 284         return map({
 285                         my $l=160;
 286                         if (!$ignorenewmail) {  # send by mail
 287                                 $l-=length("Z emailu FIXME SMSmailError: ");
 288                                 $l-=length(smsbuild($_,$smscount));
 289                                 }
 290                         else {  # send by web
 291                                 $l-=6;  # 154 is the max length before split; why?
 292                                 }
 293                         $l;
 294                         } (0..$smscount-1));
 295 }
 296
 297 sub smssend_web
 298 {
 299 my($squeezed,$smscount,@lens)=@_;
 300
 301         $smscount=POSIX::ceil($smscount/5);
 302         for my $smsi (0..$smscount-1) {
 303                 my $len=$lens[$smsi];
 304                 $squeezed=~/^.{0,$len}/s;
 305                 my $frag=$&;
 306                 $squeezed=$';
 307                 return 0 if 3!=@SMSwebRcpt;
 308                 local *F;
 309                 open F,"$HOME/priv/WWW-SMS-$SMSwebRcpt_username.pwd" or return 0;
 310                 my $pwd=<F>;
 311                 chomp $pwd;
 312                 close F;
 313                 my $sms=WWW::SMS->new(@SMSwebRcpt,$frag,"username"=>$SMSwebRcpt_username,"passwd"=>$pwd);
 314                 for ($sms->gateways("sorted"=>"reliability")) {
 315                         last if $sms->send($_);
 316                         Sys::Syslog::syslog("warning","Web SMS send failed: %s",$WWW::SMS::Error);
 317                         my $void=$WWW::SMS::Error;      # Prevent: Name "WWW::SMS::Error" used only once
 318                         }
 319                 }
 320         return 1;
 321 }
 322
 323 sub smssend_mail
 324 {
 325 my($squeezed,$smscount,@lens)=@_;
 326
 327         return 0;
 328 }
 329
 330 sub smssend
 331 {
 332 my($ignorenewmail,$smscount,%args)=@_;
 333
 334         my $text=PerlMail::Config::audit_sms(
 335                         "subject"=>unmime($Audit->subject()),
 336                         "from"=>[ Mail::Address->parse(unmime($Audit->from())) ],
 337                         "body"=>substr(body_simple(),0,$MaxBodySMS*(1+0.25*$smscount)),
 338                         %args);
 339         my $texthead="";
 340         ($texthead,$text)=@$text if ref $text;
 341         do { print "$texthead\n$text\n"; return; } if $opt_smstest;
 342         my @lens=smslens($ignorenewmail,$smscount,%args);
 343         my $maxlen=0;
 344         $maxlen+=$_ for (@lens);
 345         my $squeezed;
 346         for my $squeeze (@sms_squeezes) {
 347                 local $_;
 348                  Lingua::EN::Squeeze::SqueezeControl($_)    if defined ($_=$squeeze->{"SqueezeControl"});
 349                 $Lingua::EN::Squeeze::SQZ_OPTIMIZE_LEVEL or 1;  # prevent: Name "$_" used only once: possible typo
 350                 $Lingua::EN::Squeeze::SQZ_OPTIMIZE_LEVEL=$_ if defined ($_=$squeeze->{"SQZ_OPTIMIZE_LEVEL"});
 351                 $squeezed=Lingua::EN::Squeeze::SqueezeText($text);
 352                 chomp $squeezed;
 353                 last if $maxlen>=length($texthead.$squeezed);
 354                 }
 355         $squeezed=substr $texthead.$squeezed,0,$maxlen; # strip if we passed thru last for() above
 356         my $recalclen=0;
 357         for ($smscount=0;$recalclen<length $squeezed;$smscount++) {
 358                 $recalclen+=$lens[$smscount];
 359                 }
 360         my $func=($ignorenewmail ? \&smssend_web : \&smssend_mail);
 361         &$func($squeezed,$smscount,@lens);
 362 }
 363
 364 sub smssend_tryall
 365 {
 366 my($ignorenewmail,@args)=@_;
 367
 368         return if !$opt_smstest && !$opt_idle && defined useridle();
 369         local $_;
 370         return $_ if                     $_=smssend(1,@args);   # web
 371         return $_ if !$ignorenewmail && ($_=smssend(0,@args));  # mail
 372         warn "Unable to SMSsend the mail";
 373         return 0;
 374 }
 375
 376 sub cut
 377 {
 378         local $_=$_[0];
 379         return "<???>" if !defined($_) || /^\s*$/s;
 380         s/^\s*//s;
 381         s/\s*$//s;
 382         return $_ if length($_)<128;
 383         return substr($_,0,128)."...";
 384 }
 385
 386 our $profile_eval_depth=0;
 387 # ($name || @$name)
 388 sub profile_eval
 389 {
 390 my($name)=@_;
 391
 392         die "Nesting profile: $name" if 0x10<=(local $profile_eval_depth=$profile_eval_depth+1);
 393         return @$name if ref $name;
 394         if (!exists $audit_profile{$name}) {
 395                 cluck "Profile not found: $name";
 396                 return "did";
 397         }
 398         my @this=@{$audit_profile{$name}};
 399         return (profile_eval($'),@this[1..$#this]) if $this[0] && $this[0]=~/^=/;
 400         return @this;
 401 }
 402
 403 sub address_show
 404 {
 405 my($text)=@_;
 406
 407         return join(",",map({ $_->name() or $_->address(); } Mail::Address->parse($text)));
 408 }
 409
 410 sub unmime
 411 {
 412 my($text)=@_;
 413
 414         return join "",map({
 415                         my $cstocs;
 416                         for (${$_}[1],"iso-8859-2") {
 417                                 last if $_ && ($cstocs=Cz::Cstocs->new($_,"ascii"));
 418                                 }
 419                         &$cstocs(${$_}[0]);
 420                         } MIME::Words::decode_mimewords($text));
 421 }
 422
 423 # $folder: "$folder; comment"
 424 # $profile as profile_eval($name)
 425 sub store
 426 {
 427 my($folder,$profile,%args)=@_;
 428
 429         $profile=$store_profile if !$profile;
 430         my %do=map({ (!/=/ ? ($_=>1) : ($`=>$')); } profile_eval($profile));
 431         Sys::Syslog::syslog("info","%s%s%s: %s: %s",
 432                                         (!$Dry ? "" : "--dry: "),
 433                                         (!$store_ignore ? "" : "IGNORED[$store_ignore]: "),
 434                                         map({ cut($_); } $folder,address_show(unmime($Audit->from())),unmime($Audit->subject())),
 435                                         )
 436                         if $do{"syslog"} || $Dry;
 437         $folder=~s/;.*$//s;
 438         $folder="$Mail/".$' if $folder=~/^=/;
 439         push @AuditStored,$folder if $do{"did"};
 440         return if $store_ignore || $Dry;
 441         $DoBell++ if $do{"bell"};
 442         write_message($folder) or die;
 443         smssend_tryall $store_ignorenewmail,$do{"sms"},%args if $do{"sms"};
 444 }
 445
 446 our $did_last=0;
 447
 448 # no &$funcref=>did smth in this block
 449 # &$funcref,@funcargs
 450 sub did
 451 {
 452 my($funcref,@funcargs)=@_;
 453
 454         return @AuditStored!=$did_last if !$funcref;
 455         local $did_last=@AuditStored;
 456         &$funcref(@funcargs);
 457         return @AuditStored!=$did_last;
 458 }
 459
 460 sub writeto
 461 {
 462 my($filename)=@_;
 463
 464         local *F;
 465         open F,$filename or confess "open $filename: $!";
 466         print F $Message or confess "write $filename: $!";
 467         close F or confess "close $filename: $!";
 468         return 1;
 469 }
 470
 471 # Never use Mail::Audit->store() as it will reformat MIME bodies and possibly corrupt OpenPGP!
 472 sub write_message
 473 {
 474 my($folder)=@_;
 475
 476         return 1 if $Dry;       # simulate OK
 477         local *F;
 478         open F,">>$folder" or do { warn "Append \"$folder\": $!"; return 0; };
 479         {
 480                 local $_;
 481                 ($_=$Audit->_audit_get_lock(\*F,$folder)) and do { warn "Lock \"$folder\": $!"; last; };
 482                 seek F,0,IO::Handle::SEEK_END or do { warn "Seek-end \"$folder\": $!"; last; };
 483                 # FIXME: Check for '^From ' to not to rely on our network peer
 484                 print F $Message or do { warn "Write to \"$folder\": $!"; last; };
 485                 do { print F "\n"; warn "Missing trailing newline, fixed"; } if $Message!~/\n$/s;
 486                 close F or do { warn "Close \"$folder\""; last; };
 487                 return 1;       # OK
 488                 }
 489         warn "MAIL DROPPED for folder: $folder";
 490         close F;
 491         return 0;       # failed
 492 }
 493
 494 sub process
 495 {
 496 my($message)=@_;
 497
 498         local $_=$_;
 499         my $save_=$_;
 500         $message=~s/(\n)(From )/$1>$2/sg;
 501         local $Message=$message;
 502         # Cannot call 'local' for our-imported variable:
 503         my $Audit_save=$Audit;
 504         $Audit=Mail::Audit->new(
 505                         "emergency"=>"$Mail/emergency",
 506                         "data"=>[map("$_\n",split("\n",$message))],
 507                         "log"=>"$HOME/.perlmail.log",
 508                         "loglevel"=>99,
 509                         );
 510         local @AuditStored=();
 511         do { smssend 0,$opt_smstest; return; } if $opt_smstest;
 512         write_message("$Mail/input") or die;
 513         PerlMail::Config::audit();
 514         warn 'Corrupted $_, repaired' if defined($save_)!=defined($_) || (defined($_) && $save_ ne $_);
 515         # restore:
 516         $Audit=$Audit_save;
 517 }
 518
 519 # utility functions:
 520
 521 sub _spamchildcode
 522 {
 523 my($err,$isspam)=@_;
 524
 525         $err=$? if !defined $err;
 526         return undef()    if !WIFEXITED($?);
 527         return undef()    if  WIFSIGNALED($?);
 528         return undef()    if  WIFSTOPPED($?);
 529         return 0 if !WEXITSTATUS($?);
 530         return $isspam||1 if 1==WEXITSTATUS($?);        # isspam
 531         cluck "Possible FIXME or your system is broken (WEXITSTATUS==".WEXITSTATUS($?).")";
 532         return 0;       # simulate as not spam
 533 }
 534
 535 # return: true (error-message or "1") if is spam
 536 sub spamassassin
 537 {
 538 my($cmd)=@_;
 539
 540         #$cmd||="nice spamassassin --exit-code 1 --mbox";
 541         $cmd||="spamc -c -s 50000000";
 542         # spamassassin has the specified exit code if IS spam, code 0 if NOT spam
 543         # See &_spamchildcode for the code 1.
 544         local *CHILD;
 545         local $SIG{"PIPE"}=sub { warn "spamassassin gave me SIGPIPE: broken pipe"; };
 546         # prevent Razor2's: Can't call method "log" on unblessed reference at Razor2/Client/Agent.pm line 212.
 547         local $ENV{"HOME"}=$HOME;
 548         # 2>/dev/null to prevent error messages to corrupt inetd() output of perlmail-accept(1)
 549         open CHILD,"|$cmd &>/dev/null"
 550                                         # Workaround: spamassassin-3.1.3-1.fc5
 551                                         #.q{|awk '/^X-Spam-Flag: YES$/{if (!body) exit 1;}/^$/{body=1;}'}
 552                                         # Original:
 553                                         #." >/dev/null 2>/dev/null"
 554                         or return 0;
 555         print CHILD $Message;
 556         close CHILD;
 557         return _spamchildcode;
 558 }
 559
 560 # NOTE: returns undef() if !wantarray and the first header is unrecognized
 561 # Returns always HOST:IP pair(s).
 562 sub Received_for
 563 {
 564         my @r=();
 565         for my $hdr ($Audit->head->get("Received")) {
 566                 my($for)=($hdr=~/\bfor\s+\<?(\S+)\>?\b/);
 567                 return $for if !wantarray();
 568                 push @r,$for if $for;
 569                 my($from,$fromaddr)=($hdr=~/\bfrom\s+(?:(\S+)\b.*?)??\[((?:\d{1,3}\.){3}\d{1,3})\]/);
 570                 $from=$fromaddr if !defined $from;
 571                 push @r,"$from:$fromaddr" if $from;
 572                 }
 573         return @r;
 574 }
 575
 576 # Extended Mail::Audit::MAPS
 577 # $domain,$full,[$timeout]
 578 # Returns false if valid, code if spam detected.
 579 sub dnsbl
 580 {
 581 my($domain,$full,$timeout)=@_;
 582
 583         $timeout||=2;   # sec
 584         $Mail::Audit::MAPS::host=$domain;
 585         for my $host (Received_for()) {
 586                 next if $host!~/^([^:@]*):/;
 587                 my $ip=$';
 588                 # $1 is DNS name, $ip is IP address
 589                 next if $alternates_host{$1};   # leave only foreign hosts
 590                 next if $dnsbl_whitelist{$ip};
 591
 592 #               FIXME: Faking
 593 #               {
 594 #                       package My::Audit::Faked;
 595 #                       sub received { return @{$_[0]->{"received"}}; }
 596 #                       }
 597 #               my $self_faked=Mail::Audit->new();
 598 #               $self_faked->{"received"}=["[$ip]"];
 599 #               bless $self_faked,"My::Audit::Faked";
 600 #               my $code=Mail::Audit::rblcheck($self_faked,$timeout);
 601                 my $code=$Audit->rblcheck($timeout);
 602
 603                 next if !$code;
 604                 # Some 0.0.0.0 etc. found for <linux-kernel@>, see: &Mail::Audit::MAPS::_checkit
 605                 # Do not: $code!='1 Invalid IP address '
 606                 # as it causes warn.
 607                 return $code if $code ne '1 Invalid IP address ';
 608                 return if !$full;
 609                 }
 610 }
 611
 612 # Returns true if IS virus; the message will contain the virus name
 613 sub clamscan
 614 {
 615 my($cmd)=@_;
 616
 617         $cmd||='nice clamscan --no-summary -';
 618         # clamscan has exit code 1 if IS virus , code 0 if NOT virus
 619         # Do not use IPC::Open2 as it would try to use our STDERR which is not valid by: local *STDERR;
 620         local(*WR,*RD,*ERR);
 621         local $SIG{"PIPE"}=sub { warn "clamscan '$cmd' gave me SIGPIPE: broken pipe"; };
 622         my $pid=open3(\*WR,\*RD,\*ERR,$cmd.' 2>&1')
 623                         or do { cluck "IPC::Open3 $cmd: $!"; return 0; };
 624         print WR $Message;
 625         close WR or do { cluck "close WR of $cmd: $!"; return 0; };
 626         my $status=do { local $/=undef(); <RD>; };
 627         close RD or do { cluck "close RD of $cmd: $!"; return 0; };
 628         # Do not: $status.=do { local $/=undef(); <ERR>; };
 629         #         close ERR or do { cluck "close ERR of $cmd: $!"; return 0; };
 630         # (FIXME) as it causes: Use of uninitialized value in <HANDLE>
 631         # waitpid fills $? for: &_spamchildcode
 632         local $SIG{"ALRM"}=sub { warn "Timeout $clamscan_waitpid_timeout sec waiting for child $cmd"; };
 633         alarm $clamscan_waitpid_timeout;
 634         # Do not: WNOHANG
 635         # as it would not be enough for clamscan(1) even after all close-s above.
 636         my $pidcheck=waitpid($pid,0);
 637         alarm 0;
 638         my $err=$?;
 639         $pidcheck && $pidcheck==$pid
 640                         or do { cluck "waitpid for $cmd returned $pidcheck!=$pid"; return 0; };
 641         $status=~s/^stdin: //mg;
 642         # Prevent: LibClamAV Warning: PGP encoded attachment not scanned
 643         $status=~s/^.*\bwarning:.*\n//img;
 644         $status=~s/\n$//;
 645         return $status if $status ne "OK" && $status;
 646         return _spamchildcode $err,$status;
 647 }
 648
 649 sub muttrc_aliases
 650 {
 651         my %r=();
 652         for (muttrc()) {
 653                 next if !(my $key=(/^alias\s+(\S+)\s+/)[0]);
 654                 for my $addrobj (Mail::Address->parse($')) {
 655                         my $addr=$addrobj->address();
 656                         my $ref=\$r{"\L$addr"};
 657                         $$ref=$key if !$$ref;   # use always the first occurence to prefer nicks
 658                         }
 659                 }
 660         return %r;
 661 }
 662
 663 # FIXME: host may get multiple recipients and thus not showing "for <...>"
 664 # FIXME: muttrc_get("from") is too strict
 665 sub store_muttrc_alternates
 666 {
 667 my($prefix,$profile)=@_;
 668
 669         my $alternates=muttrc_get("alternates") or return;
 670         my $alternatesre=qr/$alternates/si;
 671         my $From=muttrc_get("from") or return;
 672         my $Fromre=qr/^\Q$From\E$/si;
 673         my $Fromobj=parseone $From or return;
 674         warn "'From' \"$From\" not matched by 'alternates': $alternatesre"
 675                         if $From!~/$alternates/si;
 676         for my $for (reverse Received_for()) {
 677                 $for=~s/:.*$//; # strip IP address here
 678                 my $forobj=parseone $for;
 679                 if ($forobj && $forobj->host()) {
 680                         # it is 'for' our primary address
 681                         next if lc($forobj->host()) eq lc($Fromobj->host());    # or 'return'? shouldn't matter
 682                         }
 683                 next if !$alternates_host{lc $for} && $for!~/$alternatesre/si;
 684                 store "$prefix\L$for",($profile || []);
 685                 return;
 686                 }
 687 }
 688
 689 # $header: ref CODE
 690 # $header: !ref => $Audit->get($header)
 691 # $maybeaddress: qr/regex/i
 692 # $maybeaddress: "string"
 693 # $maybeaddress: "<Regexp:regex>"       # hack :-(
 694 # $maybeaddress: "<user@host>"
 695 # $maybeaddress: "<user@>"
 696 # $maybeaddress: "<@host>"
 697 sub _headercore
 698 {
 699 my($re,$justone,$header,$maybeaddress)=@_;
 700
 701         if (ref $header) {
 702                 $header=join(",",&$header());
 703                 }
 704         else {
 705                 $header=$Audit->get($header);
 706                 }
 707         return 0 if !$header;
 708         return $header=~/$maybeaddress/i if "Regexp" eq ref $maybeaddress;
 709         return $header=~/$re/i if !defined(my $want=($maybeaddress=~/^\<(.*)\>$/)[0]);
 710         my @parsed=Mail::Address->parse($header);
 711         warn "'mailto:' forbidden in pattern: $want" if $want=~/^\Qmailto:\E/;
 712         return 0 if $justone && 1!=@parsed;
 713         return grep {
 714                            if ($want=~/^Regexp:/)
 715                                 { $_->address()=~/$'/i; }
 716                         elsif ($want=~/\@$/)
 717                                 { $_->user()   =~/^(?:\Qmailto:\E)?\Q$`\E/i; }
 718                         elsif ($want=~/^\@/)
 719                                 { $_->host()   =~/^\Q$'\E/i; }
 720                         else
 721                                 { $_->address()=~/^(?:\Qmailto:\E)?\Q$want\E/i; }
 722                         } @parsed;
 723 }
 724
 725 sub headerhas
 726 {
 727 my($header,$substr)=@_;
 728
 729         return _headercore(qr/\Q$substr\E/i,0,$header,$substr);
 730 }
 731
 732 sub headeris
 733 {
 734 my($header,$string)=@_;
 735
 736         cluck if !defined $string;
 737         return _headercore(qr/\Q$string\E/i,1,$header,$string);
 738 }
 739
 740 # $header,%$map
 741 sub header_remap
 742 {
 743 my($header,$map)=@_;
 744
 745         my $text=$Audit->get($header);
 746         my $orig=$text;
 747         while (my($from,$to)=each(%$map)) {
 748                 $text=~s/\b\Q$from\E\b/$to/gsi;
 749                 }
 750         return if $text eq $orig;
 751         $Audit->put_header("X-PerlMail-header_remap-$header",$orig);
 752         $Audit->replace_header($header,$text);
 753 }
 754
 755 # LMTP engine:
 756 use Net::Cmd qw(CMD_OK CMD_MORE);
 757 {
 758         package My::Net::SMTP::LMTP;
 759         require Net::SMTP;
 760         our @ISA=qw(Net::SMTP);
 761         use Net::SMTP;
 762         use Net::Cmd qw(CMD_OK);
 763         use Carp qw(confess cluck);
 764
 765         # Do not: sub _HELO
 766         # as it would not set {'net_smtp_esmtp'}
 767         sub _EHLO { shift->command("LHLO", @_)->response()  == CMD_OK }
 768
 769         sub clucked
 770         {
 771         my($self,$func,@args)=@_;
 772
 773                 do { return $_ if defined $_; } for $self->$func(@args);
 774                 cluck $func;
 775                 return;
 776         }
 777 }
 778
 779
 780 sub lmtp_deliver
 781 {
 782 my($admin_user,$admin_pwd,$user_from,$user_to)=@_;
 783
 784         my $lmtp=My::Net::SMTP::LMTP->clucked("new","localhost","Port"=>"lmtp",
 785 #                       "Debug"=>1,
 786                         ) or return;
 787         bless $lmtp,"My::Net::SMTP::LMTP";
 788 # Prevent:
 789 # due to:
 790 #       $lmtp->auth(Authen::SASL->new(
 791 #                       "mechanism"=>"PLAIN",
 792 #                       "callback"=>{
 793 #                                       "user"=>$admin_user,
 794 #                                       "pass"=>$admin_pwd,
 795 #                                       # Prevent: "authname"=>$admin_user
 796 #                                       # as it causes: DIE: Unknown callback: 'authname'. (user|auth|language|pass)
 797 #                                       }));
 798         # FIXME: Authentication hack:
 799         $lmtp->command("AUTH PLAIN")->response()==CMD_MORE
 800                         or do { cluck "auth announce"; return; };
 801         $lmtp->clucked("command",encode_base64($user_from."\x00".$admin_user."\x00".$admin_pwd)) or return;
 802         $lmtp->clucked("mail",$user_from) or return;
 803         $lmtp->clucked("to",$user_to) or return;
 804         $lmtp->clucked("data"); # Do not: or return;
 805         # Prevent: 554 5.6.0 Message contains invalid header
 806         (my $data=$Message)=~s/\AFrom .*\r?\n//;
 807         $lmtp->clucked("datasend",$data) or return;
 808         $lmtp->clucked("dataend") or return;
 809         $lmtp->clucked("quit") or return;
 810 }
 811
 812
 813 # MAIN
 814
 815 $Getopt::Long::ignorecase=0;
 816 die "GetOptions error" if !Getopt::Long::GetOptions(
 817                   "inetd"    ,sub { $opt_mode=\&inetd; },
 818                   "stdin"    ,sub { $opt_mode=\&stdin; },
 819                   "single!"  ,\$opt_single,
 820                   "dry"      ,\$Dry,
 821                   "smstest:s",sub { $opt_mode=\&stdin; $opt_smstest=($_[1] || 1); },
 822                   "idle!"    ,\$opt_idle,
 823                   "idletest" ,sub { syslogging_restore(); print((defined($_=useridle()) ? $_ : "<undef>")."\n"); exit 0; },
 824                   "muttrc"   ,sub { syslogging_restore(); print scalar muttrc(); exit 0; },
 825                 );
 826 # "Excessive arguments" checked in &inetd
 827 die "Missing mode" if !$opt_mode;
 828
 829 %alternates_host=map((lc($_)=>1),@alternates_host);
 830 %dnsbl_whitelist=map((   $_ =>1),@dnsbl_whitelist);
 831
 832 &$opt_mode();
 833 die "NOTREACHED";