source: trunk/cgi-bin/admin.cgi @ 259

Last change on this file since 259 was 259, checked in by Kris Deugau, 17 years ago

/trunk

Modify add user capability in admin.cgi to allow a
pre-encrypted password to be used.

  • Property svn:executable set to *
  • Property svn:keywords set to Date Rev Author
File size: 19.4 KB
Line 
1#!/usr/bin/perl
2# ipdb/cgi-bin/admin.cgi
3# Hack interface to make specific changes to IPDB that (for one reason
4# or another) can't be made through the main interface.
5#
6###
7# SVN revision info
8# $Date: 2005-06-13 20:33:16 +0000 (Mon, 13 Jun 2005) $
9# SVN revision $Rev: 259 $
10# Last update by $Author: kdeugau $
11###
12# Copyright (C) 2004,2005 - Kris Deugau
13
14use strict;
15use warnings;
16use CGI::Carp qw(fatalsToBrowser);
17use DBI;
18use CommonWeb qw(:ALL);
19use MyIPDB;
20#use POSIX qw(ceil);
21use NetAddr::IP;
22
23use Sys::Syslog;
24
25openlog "IPDB-admin","pid","local2";
26
27# Collect the username from HTTP auth.  If undefined, we're in a test environment.
28my $authuser;
29if (!defined($ENV{'REMOTE_USER'})) {
30  $authuser = '__temptest';
31} else {
32  $authuser = $ENV{'REMOTE_USER'};
33}
34
35syslog "debug", "$authuser active";
36
37# Why not a global DB handle?  (And a global statement handle, as well...)
38# Use the connectDB function, otherwise we end up confusing ourselves
39my $ip_dbh;
40my $sth;
41my $errstr;
42($ip_dbh,$errstr) = connectDB_My;
43if (!$ip_dbh) {
44  printAndExit("Database error: $errstr\n");
45}
46initIPDBGlobals($ip_dbh);
47
48if ($IPDBacl{$authuser} !~ /A/) {
49  print "Content-Type: text/html\n\n".
50        "<html><head><title>Access denied</title></head><body>\n".
51        'Access to this tool is restricted.  Contact <a href="mailto:kdeugau@vianet.ca">Kris</a> '.
52        "for more information.</body></html>\n";
53  exit;
54}
55
56my %webvar = parse_post();
57cleanInput(\%webvar);
58
59print "Content-type: text/html\n\n".
60        "<html>\n<head>\n\t<title>TEST [IPDB admin tools] TEST</title>\n".
61        qq(\t<link rel="stylesheet" type="text/css" href="/ip/ipdb.css">\n).
62        "</head>\n<body>\n".
63        "<h2>IPDB - Administrative Tools</h2>\n<hr>\n";
64
65if(!defined($webvar{action})) {
66  $webvar{action} = "<NULL>";   #shuts up the warnings.
67
68  my $typelist = '';
69  $sth = $ip_dbh->prepare("select type,listname from alloctypes where listorder < 900 order by listorder");
70  $sth->execute;
71  my @data = $sth->fetchrow_array;
72  $typelist .= "<option value='$data[0]' selected>$data[1]</option>\n";
73  while (my @data = $sth->fetchrow_array) {
74    $typelist .= "<option value='$data[0]'>$data[1]</option>\n";
75  }
76
77  print qq(WARNING:  There are FAR fewer controls on what you can do here.  Use the
78main interface if at all possible.
79<hr>
80<a href="admin.cgi?action=newalloc">Add allocation</a>
81<hr>
82<form action="admin.cgi" method="POST">
83<input type=hidden name=action value=alloc>
84Allocate block/IP: <input name=cidr> as <select name=alloctype>$typelist</select> to <input name=custid>
85<input type=submit value=" GIMME!! "></form>
86<hr><form action="admin.cgi" method="POST">
87<input type=hidden name=action value=alloctweak>
88Manually update allocation data in this /24: <input name=allocfrom>
89<input type=submit value="Show allocations">
90</form>
91<hr><a href="admin.cgi?action=showpools">List IP Pools</a> for manual tweaking and updates
92<hr><a href="admin.cgi?action=showusers">Manage users</a> (add/remove users;  change
93internal access controls - note that this does NOT include IP-based limits)
94);
95} else {
96  print '<a href="/ip/cgi-bin/admin.cgi">Back</a> to main<hr>';
97}
98
99
100## Possible actions.
101if ($webvar{action} eq 'alloc') {
102  # OK, we know what we're allocating.
103
104  if ($webvar{cidr} !~ /^\s*(\d{1,3}\.){3}\d{1,3}(\/\d{2})?\s*$/) {
105    printAndExit("Can't allocate something that's not a netblock/ip");
106  }
107
108  $sth = $ip_dbh->prepare("select def_custid from alloctypes where type='$webvar{alloctype}'");
109  $sth->execute;
110  my @data = $sth->fetchrow_array;
111  my $custid = $data[0];
112  if ($custid eq '') {
113    # Type that doesn't have a default custid
114    $custid = $webvar{custid};
115  }
116##fixme Check billing DB here
117
118  my $cidr = new NetAddr::IP $webvar{cidr};
119  my @data;
120  if ($webvar{alloctype} eq 'rm') {
121    $sth = $ip_dbh->prepare("select cidr from freeblocks where cidr >>='$cidr' and routed='n'");
122    $sth->execute;
123    @data = $sth->fetchrow_array;
124# User deserves errors if user can't be bothered to find the free block first.
125    printAndExit("Can't allocate from outside a free block!!\n")
126        if !$data[0];
127  } elsif ($webvar{alloctype} =~ /^(.)i$/) {
128    $sth = $ip_dbh->prepare("select cidr from allocations where cidr >>='$cidr' and (type like '_d' or type like '_p')");
129    $sth->execute;
130    @data = $sth->fetchrow_array;
131# User deserves errors if user can't be bothered to find the pool and a free IP first.
132    printAndExit("Can't allocate static IP from outside a pool!!\n")
133        if !$data[0];
134  } else {
135    $sth = $ip_dbh->prepare("select cidr from freeblocks where cidr >>='$cidr' and not (routed='n')");
136    $sth->execute;
137    @data = $sth->fetchrow_array;
138# User deserves errors if user can't be bothered to find the free block first.
139    printAndExit("Can't allocate from outside a routed block!!\n")
140        if !$data[0];
141  }
142
143  my $alloc_from = new NetAddr::IP $data[0];
144  $sth->finish;
145
146  my $cities = '';
147  foreach my $city (@citylist) {
148    $cities .= "<option>$city</option>\n";
149  }
150
151  print qq(<table class=regular>
152<form method=POST action=admin.cgi>
153<tr class=color1>
154<td>Allocating:</td>
155<td>$cidr<input type=hidden name=cidr value="$cidr"></td>
156</tr><tr class=color2>
157<td>Type:</td><td>$disp_alloctypes{$webvar{alloctype}}
158<input type=hidden name=alloctype value="$webvar{alloctype}"></td>
159</tr><tr class=color1>
160<td>Allocated from:</td>
161<td>$alloc_from<input type=hidden name=alloc_from value="$alloc_from"></td>
162</tr><tr class="color2">
163<td>Customer ID:</td><td>$custid<input type=hidden name=custid value="$custid"></td>
164</tr><tr class=color1>
165<td>Customer location:</td><td>
166<select name="city"><option selected>-</option>
167$cities
168</select>
169&nbsp;<a href="javascript:popNotes('/ip/newcity.html')">Add new location</a>
170</td>
171</tr>
172<tr class="color2">
173<td>Circuit ID:</td><td><input name=circid size=40></td>
174</tr><tr class="color1">
175<td>Description/Name:</td><td><input name="desc" size=40></td>
176</tr><tr class="color2">
177<td>Notes:</td><td><textarea name="notes" rows="3" cols="40"></textarea></td>
178</tr><tr class="warning">
179<td colspan=2><center>WARNING:  This will IMMEDIATELY assign this block!!</center></td>
180</tr><tr class="color2">
181<td class="center" colspan="2"><input type="submit" value="  Assign  "></td>
182<input type="hidden" name="action" value="confirm">
183</tr>
184</table>
185);
186
187
188} elsif ($webvar{action} eq 'confirm') {
189
190  print "Assigning $webvar{cidr} to $webvar{custid} (\"$webvar{desc}\") as ".
191        "$disp_alloctypes{$webvar{alloctype}}...<br>\n";
192  # Only need to check city here.
193  if ($webvar{city} eq '-') {
194    printError("Invalid customer location!  Go back and select customer's location.");
195  } else {
196    my ($retcode,$msg) = allocateBlock($ip_dbh, $webvar{cidr}, $webvar{alloc_from},
197        $webvar{custid}, $webvar{alloctype}, $webvar{city}, $webvar{desc}, $webvar{notes},
198        $webvar{circid});
199    if ($retcode eq 'OK') {
200      print "Allocation OK!\n";
201
202      if ($webvar{alloctype} =~ /^.i$/) {
203        # Notify tech@example.com
204        mailNotify('tech@example.com',"$disp_alloctypes{$webvar{alloctype}} allocation",
205          "$disp_alloctypes{$webvar{alloctype}} $msg allocated to customer $webvar{custid}\n".
206          "Description: $webvar{desc}\n\nAllocated by: $authuser\n");
207      }
208      syslog "notice", "$authuser allocated '$webvar{cidr}' to '$webvar{custid}' as ".
209        "'$webvar{alloctype}'";
210    } else {
211      print "Allocation failed!  IPDB::allocateBlock said:\n$msg\n";
212      syslog "err", "($authuser) Allocation of '$webvar{cidr}' to '$webvar{custid}' as ".
213        "'$webvar{alloctype}' failed: '$msg'";
214    }
215  } # done city check
216
217} elsif ($webvar{action} eq 'alloctweak') {
218  fix_allocfrom();
219  showAllocs($webvar{allocfrom});
220} elsif ($webvar{action} eq 'update') {
221  update();
222} elsif ($webvar{action} eq 'assign') {
223  # Display a list of possible blocks within the requested block.
224  open (HTML, "../admin_alloc.html")
225        or croak "Could not open admin_alloc.html :$!";
226  my $html = join('', <HTML>);
227  $html =~ s/\$\$MASK\$\$/$webvar{masklen}/g;
228  $html =~ s/\$\$ALLOCFROM\$\$/$webvar{allocfrom}/g;
229
230  my $from = new NetAddr::IP $webvar{allocfrom};
231  my @blocklist = $from->split($webvar{masklen});
232  my $availblocks;
233  foreach (@blocklist) {
234    $availblocks .= qq(<tr><td colspan=2 align=center><input type=radio name=block value="$_">$_</td></tr>\n);
235  }
236  $html =~ s/\$\$BLOCKLIST\$\$/$availblocks/g;
237
238  print $html;
239} elsif ($webvar{action} eq 'showpools') {
240  print "IP Pools currently allocated:\n".
241        "<table border=1>\n<tr><td>Pool</td><td># of free IPs</td></tr>\n";
242  $sth = $ip_dbh->prepare("select cidr from allocations where type like '%p' or type like '%d' order by cidr");
243  $sth->execute;
244  my %poolfree;
245  while (my @data = $sth->fetchrow_array) {
246    $poolfree{$data[0]} = 0;
247  }
248  $sth = $ip_dbh->prepare("select pool,ip from poolips where available='y' order by ip");
249  $sth->execute;
250  while (my @data = $sth->fetchrow_array) {
251    $poolfree{$data[0]}++;
252  }
253  foreach my $key (keys %poolfree) {
254    print qq(<tr><td><a href="admin.cgi?action=tweakpool&pool=$key">$key</a></td>).
255        "<td>$poolfree{$key}</td></tr>\n";
256  }
257  print "</table>\n";
258} elsif ($webvar{action} eq 'tweakpool') {
259  showPool($webvar{pool});
260} elsif ($webvar{action} eq 'updatepool') {
261
262  $sth = $ip_dbh->prepare("update poolips set custid='$webvar{custid}', ".
263        "city='$webvar{city}', type='$webvar{type}', available='".
264        (($webvar{available} eq 'y') ? 'y' : 'n').
265        "', notes='$webvar{notes}', description='$webvar{desc}' ".
266        "where ip='$webvar{ip}'");
267  $sth->execute;
268  if ($sth->err) {
269    print "Error updating pool IP $webvar{ip}: $@<hr>\n";
270    syslog "err", "$authuser could not update pool IP $webvar{ip}: $@";
271  } else { 
272    $sth = $ip_dbh->prepare("select pool from poolips where ip='$webvar{ip}'");
273    $sth->execute;
274    my @data = $sth->fetchrow_array;
275    print "$webvar{ip} in $data[0] updated\n<hr>\n";
276    syslog "notice", "$authuser updated pool IP $webvar{ip}";
277  }
278} elsif ($webvar{action} eq 'showusers') {
279  print "Notes:<br>\n".
280        "<li>Admin users automatically get all other priviledges.\n".
281        "<hr>Add new user:<form action=admin.cgi method=POST>\n".
282        "Username: <input name=username><br>\n".
283        "Password: <input name=password> <input type=checkbox name=preenc>Password is pre-encrypted (MUST be crypt() encrypted)<br>\n".
284        "<input type=submit value='Add user'><input type=hidden name=action value=newuser></form>\n";
285
286  print "<hr>Users with access:\n<table border=1>\n";
287  print "<tr><td>Username</td><td>Add new</td><td>Change</td>".
288        "<td>Delete</td><td>Admin user</td></tr>\n".
289        "<form action=admin.cgi method=POST>\n";
290  $sth = $ip_dbh->prepare("select username,acl from users order by username");
291  $sth->execute;
292  while (my @data = $sth->fetchrow_array) {
293    print "<form action=admin.cgi method=POST><input type=hidden name=action value=updacl>".
294        qq(<tr><td>$data[0]<input type=hidden name=username value="$data[0]"></td><td>).
295    # Now for the fun bit.  We have to pull apart the ACL field and
296    # output a bunch of checkboxes.
297        "<input type=checkbox name=add".($data[1] =~ /a/ ? ' checked=y' : '').
298        "></td><td><input type=checkbox name=change".($data[1] =~ /c/ ? ' checked=y' : '').
299        "></td><td><input type=checkbox name=del".($data[1] =~ /d/ ? ' checked=y' : '').
300        "></td><td><input type=checkbox name=admin".($data[1] =~ /A/ ? ' checked=y' : '').
301        qq(></td><td><input type=submit value="Update"></td></form>\n).
302        "<form action=admin.cgi method=POST><td><input type=hidden name=action value=deluser>".
303        "<input type=hidden name=username value=$data[0]>".
304        qq(<input type=submit value="Delete user"></tr></form>\n);
305
306  }
307  print "</table>\n";
308} elsif ($webvar{action} eq 'updacl') {
309  print "Updating ACL for $webvar{username}:<br>\n";
310  my $acl = 'b';
311  if ($webvar{admin} eq 'on') {
312    $acl .= "acdA";
313  } else {
314    $acl .= ($webvar{add} eq 'on' ? 'a' : '').
315        ($webvar{change} eq 'on' ? 'c' : '').
316        ($webvar{del} eq 'on' ? 'd' : '');
317  }
318  print "New ACL: $acl<br>\n";
319
320  $sth = $ip_dbh->prepare("update users set acl='$acl' where username='$webvar{username}'");
321  $sth->execute;
322  print "OK\n" if !$sth->err;
323
324  print qq(<hr><a href="admin.cgi?action=showusers">Back</a> to user listing\n);
325
326} elsif ($webvar{action} eq 'newuser') {
327  print "Adding user $webvar{username}...\n";
328  my $cr_pass = ($webvar{preenc} ? $webvar{password} :
329        crypt $webvar{password}, join('',('.','/',0..9,'A'..'Z','a'..'z')[rand 64, rand 64]));
330  $sth = $ip_dbh->prepare("insert into users (username,password,acl) values ".
331        "('$webvar{username}','$cr_pass','b')");
332  $sth->execute;
333  if ($sth->err) {
334    print "<br>Error adding user: ".$sth->errstr;
335  } else {
336    print "OK\n";
337  }
338
339  print qq(<hr><a href="admin.cgi?action=showusers">Back</a> to user listing\n);
340
341} elsif ($webvar{action} eq 'deluser') {
342  print "Deleting user $webvar{username}.<br>\n";
343  $sth = $ip_dbh->prepare("delete from users where username='$webvar{username}'");
344  $sth->execute;
345  print "OK\n" if !$sth->err;
346
347  print qq(<hr><a href="admin.cgi?action=showusers">Back</a> to user listing\n);
348
349} elsif ($webvar{action} ne '<NULL>') {
350  print "webvar{action} check failed: Don't know how to $webvar{action}";
351}
352
353# Hokay.  This is a little different.  We have a few specific functions here:
354#  -> Assign arbitrary subnet from arbitrary free space
355#  -> Tweak individual DB fields
356#
357
358
359printFooter;
360
361$ip_dbh->disconnect;
362
363exit;
364
365
366# Tweak allocfrom into shape.
367sub fix_allocfrom {
368  if ($webvar{allocfrom} =~ /^(\d+\.){2}\d+$/) {
369    # 3-octet class C specified
370    $webvar{allocfrom} .= ".0/24";
371  } elsif ($webvar{allocfrom} =~ /^(\d+\.){3}\d+$/) {
372    # 4-octet IP specified; 
373    $webvar{allocfrom} .= "/24";
374  }
375}
376
377
378# List free blocks in a /24 for arbitrary manual allocation
379sub showfree($) {
380  my $cidr = new NetAddr::IP $_[0];
381  print "Showing free blocks in $cidr<br>\n".
382        "<table border=1>\n";
383  $sth = $ip_dbh->prepare("select * from freeblocks where cidr <<= '$cidr' order by cidr");
384  $sth->execute;
385  while (my @data = $sth->fetchrow_array) {
386    my $temp = new NetAddr::IP $data[0];
387    print "<tr><form action=admin.cgi method=POST><input type=hidden name=action value=assign>\n".
388        qq(<td>$temp<input type=hidden name=allocfrom value="$temp"></td>\n).
389        "<td>".
390        (($temp->masklen == 30) ? '<input type=hidden name=masklen value=30>30'
391          : "<select name=masklen><option>30</option>\n<option>29</option>\n") .
392        (($temp->masklen < 29) ? "<option>28</option>\n" : '') .
393        (($temp->masklen < 28) ? "<option>27</option>\n" : '') .
394        (($temp->masklen < 27) ? "<option>26</option>\n" : '') .
395        (($temp->masklen < 26) ? "<option>25</option>\n" : '') .
396        (($temp->masklen < 25) ? "<option>24</option>\n" : '') .
397        "</td>".
398        qq(<td>$data[2]</td><td><input type=submit value="Allocate from here"></td>).
399        "\n</form></tr>\n";
400  }
401  print "</table>\n";
402}
403
404
405# Show allocations to allow editing.
406sub showAllocs($) {
407  my $cidr = new NetAddr::IP $_[0];
408  print "Edit custID, allocation type, city for allocations in ".
409        "$cidr:\n<table border=1>";
410  $sth = $ip_dbh->prepare("select * from allocations where cidr <<= '$cidr' order by cidr");
411  $sth->execute;
412  while (my @data = $sth->fetchrow_array) {
413    print "<tr><form action=admin.cgi method=POST><input type=hidden name=action value=update>\n".
414        qq(<td>$data[0]<input type=hidden value="$data[0]" name=block></td>\n).
415        qq(<td><input name=custid value="$data[1]"></td>\n);
416
417    print "<td><select name=alloctype><option".
418        (($data[2] eq 'cn') ? ' selected' : '') ." value='cn'>Customer netblock</option>\n<option".
419        (($data[2] eq 'si') ? ' selected' : '') ." value='si'>Static IP - Server pool</option>\n<option".
420        (($data[2] eq 'ci') ? ' selected' : '') ." value='ci'>Static IP - Cable</option>\n<option".
421        (($data[2] eq 'di') ? ' selected' : '') ." value='di'>Static IP - DSL</option>\n<option".
422        (($data[2] eq 'mi') ? ' selected' : '') ." value='mi'>Static IP - Dialup</option>\n<option".
423        (($data[2] eq 'wi') ? ' selected' : '') ." value='wi'>Static IP - Wireless</option>\n<option".
424        (($data[2] eq 'sd') ? ' selected' : '') ." value='sd'>Static Pool - Server pool</option>\n<option".
425        (($data[2] eq 'cd') ? ' selected' : '') ." value='cd'>Static Pool - Cable</option>\n<option".
426        (($data[2] eq 'dp') ? ' selected' : '') ." value='dp'>Static Pool - DSL</option>\n<option".
427        (($data[2] eq 'mp') ? ' selected' : '') ." value='mp'>Static Pool - Dialup</option>\n<option".
428        (($data[2] eq 'wp') ? ' selected' : '') ." value='wp'>Static Pool - Wireless</option>\n<option".
429        (($data[2] eq 'en') ? ' selected' : '') ." value='en'>End-use netblock</option>\n<option".
430        (($data[2] eq 'me') ? ' selected' : '') ." value='me'>Dialup netblock</option>\n<option".
431        (($data[2] eq 'de') ? ' selected' : '') ." value='de'>Dynamic DSL netblock</option>\n<option".
432        (($data[2] eq 'ce') ? ' selected' : '') ." value='ce'>Dynamic cable netblock</option>\n<option".
433        (($data[2] eq 'we') ? ' selected' : '') ." value='we'>Dynamic WiFi netblock</option>\n<option".
434        (($data[2] eq 'in') ? ' selected' : '') ." value='in'>Internal netblock</option>\n".
435        "</select></td>\n";
436    print qq(<td><input name=city value="$data[3]"></td>\n).
437        "<td>$data[4]</td><td>$data[5]</td>".
438        qq(<td><input type=submit value="Update"></td></form></tr>\n);
439  }
440  print "</table>\n";
441
442  # notes
443  print "<hr><b>Notes:</b>\n".
444        "<ul>\n<li>Use the main interface to update description and notes fields\n".
445        "<li>Changing the allocation type here will NOT affect IP pool data.\n".
446        "</ul>\n";
447}
448
449
450# Stuff updates into DB
451sub update {
452  eval {
453    # Relatively simple SQL transaction here.  Note that we're deliberately NOT
454    # updating notes/desc here as it's available through the main interface.
455    $sth = $ip_dbh->prepare("update allocations set custid='$webvar{custid}',".
456        "city='$webvar{city}',type='$webvar{alloctype}' where cidr='$webvar{block}'");
457    $sth->execute;
458    $ip_dbh->commit;
459  };
460  if ($@) {
461    carp "Transaction aborted because $@";
462    eval { $ip_dbh->rollback; };
463    syslog "err", "$authuser could not update block '$webvar{block}': '$@'";
464  } else {
465    # If we get here, the operation succeeded.
466    syslog "notice", "$authuser updated $webvar{block}";
467    print "Allocation $webvar{block} updated<hr>\n";
468  }
469  # need to get /24 that block is part of
470  my @bits = split /\./, $webvar{block};
471  $bits[3] = "0/24";
472  showAllocs((join ".", @bits));
473}
474
475
476# showPool()
477# List all IPs in a pool, and allow arbitrary admin changes to each
478# Allow changes to ALL fields
479sub showPool($) {
480  my $pool = new NetAddr::IP $_[0];
481  print qq(Listing pool $pool:\n<table border=1>
482<form action=admin.cgi method=POST>
483<input type=hidden name=action value=updatepool>
484<tr><td align=right>Customer ID:</td><td><input name=custid></td></tr>
485<tr><td align=right>Customer location:</td><td><input name=city></td></tr>
486<tr><td align=right>Type:</td><td><select name=type><option selected>-</option>
487<option value="si">Static IP - Server pool</option>
488<option value="ci">Static IP - Cable</option>
489<option value="di">Static IP - DSL</option>
490<option value="mi">Static IP - Dialup</option>
491<option value="wi">Static IP - Wireless</option>
492</select></td></tr>
493<tr><td align=right>Available?</td><td><input type=checkbox value=y></td></tr>
494<tr><td align=right>Description/name:</td><td><input name=desc size=40></td></tr>
495<tr><td align=right>Notes:</td><td><textarea name=notes rows=3 cols=40></textarea></td></tr>
496<tr><td colspan=2 align=center><input type=submit value="Update"></td></tr>
497).
498        "</table>Update the following record:<table border=1>\n";
499  $sth = $ip_dbh->prepare("select pool,ip,custid,city,type,available,description,notes from poolips where pool='$pool' order by ip");
500  $sth->execute;
501  while (my @data = $sth->fetchrow_array) {
502    print qq(<tr><td><input type=radio name=ip value="$data[1]">$data[1]</td>).
503        "<td>$data[2]</td><td>$data[3]</td><td>$data[4]</td>".
504        "<td>$data[5]</td><td>$data[6]</td><td>$data[7]</td></tr>\n";
505  }
506  print "</form></table>\n";
507}
Note: See TracBrowser for help on using the repository browser.