make-secnet-sites

   1 #! /usr/bin/env python3
   2 #
   3 # This file is part of secnet.
   4 # See README for full list of copyright holders.
   5 #
   6 # secnet is free software; you can redistribute it and/or modify it
   7 # under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # secnet is distributed in the hope that it will be useful, but
  12 # WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 # General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # version 3 along with secnet; if not, see
  18 # https://www.gnu.org/licenses/gpl.html.
  19
  20 """VPN sites file manipulation.
  21
  22 This program enables VPN site descriptions to be submitted for
  23 inclusion in a central database, and allows the resulting database to
  24 be turned into a secnet configuration file.
  25
  26 A database file can be turned into a secnet configuration file simply:
  27 make-secnet-sites.py [infile [outfile]]
  28
  29 It would be wise to run secnet with the "--just-check-config" option
  30 before installing the output on a live system.
  31
  32 The program expects to be invoked via userv to manage the database; it
  33 relies on the USERV_USER and USERV_GROUP environment variables. The
  34 command line arguments for this invocation are:
  35
  36 make-secnet-sites.py -u header-filename groupfiles-directory output-file \
  37   group
  38
  39 All but the last argument are expected to be set by userv; the 'group'
  40 argument is provided by the user. A suitable userv configuration file
  41 fragment is:
  42
  43 reset
  44 no-disconnect-hup
  45 no-suppress-args
  46 cd ~/secnet/sites-test/
  47 execute ~/secnet/make-secnet-sites.py -u vpnheader groupfiles sites
  48
  49 This program is part of secnet.
  50
  51 """
  52
  53 from __future__ import print_function
  54 from __future__ import unicode_literals
  55 from builtins import int
  56
  57 import string
  58 import time
  59 import sys
  60 import os
  61 import getopt
  62 import re
  63 import argparse
  64 import math
  65
  66 import ipaddress
  67
  68 # entry 0 is "near the executable", or maybe from PYTHONPATH=.,
  69 # which we don't want to preempt
  70 sys.path.insert(1,"/usr/local/share/secnet")
  71 sys.path.insert(1,"/usr/share/secnet")
  72 import ipaddrset
  73
  74 from argparseactionnoyes import ActionNoYes
  75
  76 VERSION="0.1.18"
  77
  78 from sys import version_info
  79 if version_info.major == 2:  # for python2
  80     import codecs
  81     sys.stdin = codecs.getreader('utf-8')(sys.stdin)
  82     sys.stdout = codecs.getwriter('utf-8')(sys.stdout)
  83     import io
  84     open=lambda f,m='r': io.open(f,m,encoding='utf-8')
  85
  86 max={'rsa_bits':8200,'name':33,'dh_bits':8200}
  87
  88 class Tainted:
  89         def __init__(self,s,tline=None,tfile=None):
  90                 self._s=s
  91                 self._ok=None
  92                 self._line=line if tline is None else tline
  93                 self._file=file if tfile is None else tfile
  94         def __eq__(self,e):
  95                 return self._s==e
  96         def __ne__(self,e):
  97                 # for Python2
  98                 return not self.__eq__(e)
  99         def __str__(self):
 100                 raise RuntimeError('direct use of Tainted value')
 101         def __repr__(self):
 102                 return 'Tainted(%s)' % repr(self._s)
 103
 104         def _bad(self,what,why):
 105                 assert(self._ok is not True)
 106                 self._ok=False
 107                 complain('bad parameter: %s: %s' % (what, why))
 108                 return self
 109
 110         def _max_ok(self,what,maxlen):
 111                 if len(self._s) > maxlen:
 112                         self._bad(what,'too long (max %d)' % maxlen)
 113                 return self
 114
 115         def _re_ok(self,bad,what,maxlen=None):
 116                 if maxlen is None: maxlen=max[what]
 117                 self._max_ok(what,maxlen)
 118                 if self._ok is False: return self
 119                 if bad.search(self._s): return self._bad(what,'bad syntax')
 120                 return self
 121
 122         def _rtnval(self, is_ok, ifgood, ifbad=''):
 123                 if is_ok:
 124                         assert(self._ok is not False)
 125                         self._ok=True
 126                         return ifgood
 127                 else:
 128                         assert(self._ok is not True)
 129                         self._ok=False
 130                         return ifbad
 131
 132         def _rtn(self, is_ok, ifbad=''):
 133                 return self._rtnval(is_ok, self._s, ifbad)
 134
 135         def raw(self):
 136                 return self._s
 137         def raw_mark_ok(self):
 138                 # caller promises to throw if syntax was dangeorus
 139                 return self._rtn(True)
 140
 141         def output(self):
 142                 if self._ok is False: return ''
 143                 if self._ok is True: return self._s
 144                 print('%s:%d: unchecked/unknown additional data "%s"' %
 145                       (self._file,self._line,self._s),
 146                       file=sys.stderr)
 147                 sys.exit(1)
 148
 149         bad_name=re.compile(r'^[^a-zA-Z]|[^-_0-9a-zA-Z]')
 150         # secnet accepts _ at start of names, but we reserve that
 151         bad_name_counter=0
 152         def name(self):
 153                 ok=self._re_ok(Tainted.bad_name,'name')
 154                 return self._rtn(ok,
 155                                  '_line%d_%s' % (self._line, id(self)))
 156
 157         def keyword(self):
 158                 ok=self._s in keywords or self._s in levels
 159                 if not ok:
 160                         complain('unknown keyword %s' % self._s)
 161                 return self._rtn(ok)
 162
 163         bad_hex=re.compile(r'[^0-9a-fA-F]')
 164         def bignum_16(self,kind,what):
 165                 maxlen=(max[kind+'_bits']+3)/4
 166                 ok=self._re_ok(Tainted.bad_hex,what,maxlen)
 167                 return self._rtn(ok)
 168
 169         bad_num=re.compile(r'[^0-9]')
 170         def bignum_10(self,kind,what):
 171                 maxlen=math.ceil(max[kind+'_bits'] / math.log10(2))
 172                 ok=self._re_ok(Tainted.bad_num,what,maxlen)
 173                 return self._rtn(ok)
 174
 175         def number(self,minn,maxx,what='number'):
 176                 # not for bignums
 177                 ok=self._re_ok(Tainted.bad_num,what,10)
 178                 if ok:
 179                         v=int(self._s)
 180                         if v<minn or v>maxx:
 181                                 ok=self._bad(what,'out of range %d..%d'
 182                                              % (minn,maxx))
 183                 return self._rtnval(ok,v,minn)
 184
 185         bad_host=re.compile(r'[^-\][_.:0-9a-zA-Z]')
 186         # We permit _ so we can refer to special non-host domains
 187         # which have A and AAAA RRs.  This is a crude check and we may
 188         # still produce config files with syntactically invalid
 189         # domains or addresses, but that is OK.
 190         def host(self):
 191                 ok=self._re_ok(Tainted.bad_host,'host/address',255)
 192                 return self._rtn(ok)
 193
 194         bad_email=re.compile(r'[^-._0-9a-z@!$%^&*=+~/]')
 195         # ^ This does not accept all valid email addresses.  That's
 196         # not really possible with this input syntax.  It accepts
 197         # all ones that don't require quoting anywhere in email
 198         # protocols (and also accepts some invalid ones).
 199         def email(self):
 200                 ok=self._re_ok(Tainted.bad_email,'email address',1023)
 201                 return self._rtn(ok)
 202
 203         bad_groupname=re.compile(r'^[^_A-Za-z]|[^-+_0-9A-Za-z]')
 204         def groupname(self):
 205                 ok=self._re_ok(Tainted.bad_groupname,'group name',64)
 206                 return self._rtn(ok)
 207
 208 def parse_args():
 209         global service
 210         global inputfile
 211         global header
 212         global groupfiledir
 213         global sitesfile
 214         global group
 215         global user
 216         global of
 217         global key_prefix
 218
 219         ap = argparse.ArgumentParser(description='process secnet sites files')
 220         ap.add_argument('--userv', '-u', action='store_true',
 221                         help='userv service fragment update mode')
 222         ap.add_argument('--conf-key-prefix', action=ActionNoYes,
 223                         default=True,
 224                  help='prefix conf file key names derived from sites data')
 225         ap.add_argument('--prefix', '-P', nargs=1,
 226                         help='set prefix')
 227         ap.add_argument('arg',nargs=argparse.REMAINDER)
 228         av = ap.parse_args()
 229         #print(repr(av), file=sys.stderr)
 230         service = 1 if av.userv else 0
 231         key_prefix = av.conf_key_prefix
 232         if service:
 233                 if len(av.arg)!=4:
 234                         print("Wrong number of arguments")
 235                         sys.exit(1)
 236                 (header, groupfiledir, sitesfile, group) = av.arg
 237                 group = Tainted(group,0,'command line')
 238                 # untrusted argument from caller
 239                 if "USERV_USER" not in os.environ:
 240                         print("Environment variable USERV_USER not found")
 241                         sys.exit(1)
 242                 user=os.environ["USERV_USER"]
 243                 # Check that group is in USERV_GROUP
 244                 if "USERV_GROUP" not in os.environ:
 245                         print("Environment variable USERV_GROUP not found")
 246                         sys.exit(1)
 247                 ugs=os.environ["USERV_GROUP"]
 248                 ok=0
 249                 for i in ugs.split():
 250                         if group==i: ok=1
 251                 if not ok:
 252                         print("caller not in group %s"%group)
 253                         sys.exit(1)
 254         else:
 255                 if len(av.arg)>3:
 256                         print("Too many arguments")
 257                         sys.exit(1)
 258                 (inputfile, outputfile) = (av.arg + [None]*2)[0:2]
 259                 if outputfile is None: of=sys.stdout
 260                 else: of=open(outputfile,'w')
 261
 262 parse_args()
 263
 264 # Classes describing possible datatypes in the configuration file
 265
 266 class basetype:
 267         "Common protocol for configuration types."
 268         def add(self,obj,w):
 269                 complain("%s %s already has property %s defined"%
 270                         (obj.type,obj.name,w[0].raw()))
 271
 272 class conflist:
 273         "A list of some kind of configuration type."
 274         def __init__(self,subtype,w):
 275                 self.subtype=subtype
 276                 self.list=[subtype(w)]
 277         def add(self,obj,w):
 278                 self.list.append(self.subtype(w))
 279         def __str__(self):
 280                 return ', '.join(map(str, self.list))
 281 def listof(subtype):
 282         return lambda w: conflist(subtype, w)
 283
 284 class single_ipaddr (basetype):
 285         "An IP address"
 286         def __init__(self,w):
 287                 self.addr=ipaddress.ip_address(w[1].raw_mark_ok())
 288         def __str__(self):
 289                 return '"%s"'%self.addr
 290
 291 class networks (basetype):
 292         "A set of IP addresses specified as a list of networks"
 293         def __init__(self,w):
 294                 self.set=ipaddrset.IPAddressSet()
 295                 for i in w[1:]:
 296                         x=ipaddress.ip_network(i.raw_mark_ok(),strict=True)
 297                         self.set.append([x])
 298         def __str__(self):
 299                 return ",".join(map((lambda n: '"%s"'%n), self.set.networks()))
 300
 301 class dhgroup (basetype):
 302         "A Diffie-Hellman group"
 303         def __init__(self,w):
 304                 self.mod=w[1].bignum_16('dh','dh mod')
 305                 self.gen=w[2].bignum_16('dh','dh gen')
 306         def __str__(self):
 307                 return 'diffie-hellman("%s","%s")'%(self.mod,self.gen)
 308
 309 class hash (basetype):
 310         "A choice of hash function"
 311         def __init__(self,w):
 312                 hname=w[1]
 313                 self.ht=hname.raw()
 314                 if (self.ht!='md5' and self.ht!='sha1'):
 315                         complain("unknown hash type %s"%(self.ht))
 316                         self.ht=None
 317                 else:
 318                         hname.raw_mark_ok()
 319         def __str__(self):
 320                 return '%s'%(self.ht)
 321
 322 class email (basetype):
 323         "An email address"
 324         def __init__(self,w):
 325                 self.addr=w[1].email()
 326         def __str__(self):
 327                 return '<%s>'%(self.addr)
 328
 329 class boolean (basetype):
 330         "A boolean"
 331         def __init__(self,w):
 332                 v=w[1]
 333                 if re.match('[TtYy1]',v.raw()):
 334                         self.b=True
 335                         v.raw_mark_ok()
 336                 elif re.match('[FfNn0]',v.raw()):
 337                         self.b=False
 338                         v.raw_mark_ok()
 339                 else:
 340                         complain("invalid boolean value");
 341         def __str__(self):
 342                 return ['False','True'][self.b]
 343
 344 class num (basetype):
 345         "A decimal number"
 346         def __init__(self,w):
 347                 self.n=w[1].number(0,0x7fffffff)
 348         def __str__(self):
 349                 return '%d'%(self.n)
 350
 351 class address (basetype):
 352         "A DNS name and UDP port number"
 353         def __init__(self,w):
 354                 self.adr=w[1].host()
 355                 self.port=w[2].number(1,65536,'port')
 356         def __str__(self):
 357                 return '"%s"; port %d'%(self.adr,self.port)
 358
 359 class rsakey (basetype):
 360         "An RSA public key"
 361         def __init__(self,w):
 362                 self.l=w[1].number(0,max['rsa_bits'],'rsa len')
 363                 self.e=w[2].bignum_10('rsa','rsa e')
 364                 self.n=w[3].bignum_10('rsa','rsa n')
 365                 if len(w) >= 5: w[4].email()
 366         def __str__(self):
 367                 return 'rsa-public("%s","%s")'%(self.e,self.n)
 368
 369 # Possible properties of configuration nodes
 370 keywords={
 371  'contact':(email,"Contact address"),
 372  'dh':(dhgroup,"Diffie-Hellman group"),
 373  'hash':(hash,"Hash function"),
 374  'key-lifetime':(num,"Maximum key lifetime (ms)"),
 375  'setup-timeout':(num,"Key setup timeout (ms)"),
 376  'setup-retries':(num,"Maximum key setup packet retries"),
 377  'wait-time':(num,"Time to wait after unsuccessful key setup (ms)"),
 378  'renegotiate-time':(num,"Time after key setup to begin renegotiation (ms)"),
 379  'restrict-nets':(networks,"Allowable networks"),
 380  'networks':(networks,"Claimed networks"),
 381  'pubkey':(rsakey,"RSA public site key"),
 382  'peer':(single_ipaddr,"Tunnel peer IP address"),
 383  'address':(address,"External contact address and port"),
 384  'mobile':(boolean,"Site is mobile"),
 385 }
 386
 387 def sp(name,value):
 388         "Simply output a property - the default case"
 389         return "%s %s;\n"%(name,value)
 390
 391 # All levels support these properties
 392 global_properties={
 393         'contact':(lambda name,value:"# Contact email address: %s\n"%(value)),
 394         'dh':sp,
 395         'hash':sp,
 396         'key-lifetime':sp,
 397         'setup-timeout':sp,
 398         'setup-retries':sp,
 399         'wait-time':sp,
 400         'renegotiate-time':sp,
 401         'restrict-nets':(lambda name,value:"# restrict-nets %s\n"%value),
 402 }
 403
 404 class level:
 405         "A level in the configuration hierarchy"
 406         depth=0
 407         leaf=0
 408         allow_properties={}
 409         require_properties={}
 410         def __init__(self,w):
 411                 self.type=w[0].keyword()
 412                 self.name=w[1].name()
 413                 self.properties={}
 414                 self.children={}
 415         def indent(self,w,t):
 416                 w.write("                 "[:t])
 417         def prop_out(self,n):
 418                 return self.allow_properties[n](n,str(self.properties[n]))
 419         def output_props(self,w,ind):
 420                 for i in self.properties.keys():
 421                         if self.allow_properties[i]:
 422                                 self.indent(w,ind)
 423                                 w.write("%s"%self.prop_out(i))
 424         def kname(self):
 425                 return ((self.type[0].upper() if key_prefix else '')
 426                         + self.name)
 427         def output_data(self,w,path):
 428                 ind = 2*len(path)
 429                 self.indent(w,ind)
 430                 w.write("%s {\n"%(self.kname()))
 431                 self.output_props(w,ind+2)
 432                 if self.depth==1: w.write("\n");
 433                 for k in sorted(self.children.keys()):
 434                         c=self.children[k]
 435                         c.output_data(w,path+(c,))
 436                 self.indent(w,ind)
 437                 w.write("};\n")
 438
 439 class vpnlevel(level):
 440         "VPN level in the configuration hierarchy"
 441         depth=1
 442         leaf=0
 443         type="vpn"
 444         allow_properties=global_properties.copy()
 445         require_properties={
 446          'contact':"VPN admin contact address"
 447         }
 448         def __init__(self,w):
 449                 level.__init__(self,w)
 450         def output_vpnflat(self,w,path):
 451                 "Output flattened list of site names for this VPN"
 452                 ind=2*(len(path)+1)
 453                 self.indent(w,ind)
 454                 w.write("%s {\n"%(self.kname()))
 455                 for i in self.children.keys():
 456                         self.children[i].output_vpnflat(w,path+(self,))
 457                 w.write("\n")
 458                 self.indent(w,ind+2)
 459                 w.write("all-sites %s;\n"%
 460                         ','.join(map(lambda i: i.kname(),
 461                                      self.children.values())))
 462                 self.indent(w,ind)
 463                 w.write("};\n")
 464
 465 class locationlevel(level):
 466         "Location level in the configuration hierarchy"
 467         depth=2
 468         leaf=0
 469         type="location"
 470         allow_properties=global_properties.copy()
 471         require_properties={
 472          'contact':"Location admin contact address",
 473         }
 474         def __init__(self,w):
 475                 level.__init__(self,w)
 476                 self.group=w[2].groupname()
 477         def output_vpnflat(self,w,path):
 478                 ind=2*(len(path)+1)
 479                 self.indent(w,ind)
 480                 # The "path=path,self=self" abomination below exists because
 481                 # Python didn't support nested_scopes until version 2.1
 482                 #
 483                 #"/"+self.name+"/"+i
 484                 w.write("%s %s;\n"%(self.kname(),','.join(
 485                         map(lambda x,path=path,self=self:
 486                             '/'.join([prefix+"vpn-data"] + list(map(
 487                                     lambda i: i.kname(),
 488                                     path+(self,x)))),
 489                             self.children.values()))))
 490
 491 class sitelevel(level):
 492         "Site level (i.e. a leafnode) in the configuration hierarchy"
 493         depth=3
 494         leaf=1
 495         type="site"
 496         allow_properties=global_properties.copy()
 497         allow_properties.update({
 498          'address':sp,
 499          'networks':None,
 500          'peer':None,
 501          'pubkey':(lambda n,v:"key %s;\n"%v),
 502          'mobile':sp,
 503         })
 504         require_properties={
 505          'dh':"Diffie-Hellman group",
 506          'contact':"Site admin contact address",
 507          'networks':"Networks claimed by the site",
 508          'hash':"hash function",
 509          'peer':"Gateway address of the site",
 510          'pubkey':"RSA public key of the site",
 511         }
 512         def __init__(self,w):
 513                 level.__init__(self,w)
 514         def output_data(self,w,path):
 515                 ind=2*len(path)
 516                 np='/'.join(map(lambda i: i.name, path))
 517                 self.indent(w,ind)
 518                 w.write("%s {\n"%(self.kname()))
 519                 self.indent(w,ind+2)
 520                 w.write("name \"%s\";\n"%(np,))
 521                 self.output_props(w,ind+2)
 522                 self.indent(w,ind+2)
 523                 w.write("link netlink {\n");
 524                 self.indent(w,ind+4)
 525                 w.write("routes %s;\n"%str(self.properties["networks"]))
 526                 self.indent(w,ind+4)
 527                 w.write("ptp-address %s;\n"%str(self.properties["peer"]))
 528                 self.indent(w,ind+2)
 529                 w.write("};\n")
 530                 self.indent(w,ind)
 531                 w.write("};\n")
 532
 533 # Levels in the configuration file
 534 # (depth,properties)
 535 levels={'vpn':vpnlevel, 'location':locationlevel, 'site':sitelevel}
 536
 537 def complain(msg):
 538         "Complain about a particular input line"
 539         global complaints
 540         print(("%s line %d: "%(file,line))+msg)
 541         complaints=complaints+1
 542 def moan(msg):
 543         "Complain about something in general"
 544         global complaints
 545         print(msg);
 546         complaints=complaints+1
 547
 548 class UntaintedRoot():
 549         def __init__(self,s): self._s=s
 550         def name(self): return self._s
 551         def keyword(self): return self._s
 552
 553 root=level([UntaintedRoot(x) for x in ['root','root']])
 554 # All vpns are children of this node
 555 obstack=[root]
 556 allow_defs=0   # Level above which new definitions are permitted
 557 prefix=''
 558
 559 def set_property(obj,w):
 560         "Set a property on a configuration node"
 561         prop=w[0]
 562         if prop.raw() in obj.properties:
 563                 obj.properties[prop.raw_mark_ok()].add(obj,w)
 564         else:
 565                 obj.properties[prop.raw()]=keywords[prop.raw_mark_ok()][0](w)
 566
 567
 568 def pline(il,allow_include=False):
 569         "Process a configuration file line"
 570         global allow_defs, obstack, root
 571         w=il.rstrip('\n').split()
 572         if len(w)==0: return ['']
 573         w=list([Tainted(x) for x in w])
 574         keyword=w[0]
 575         current=obstack[len(obstack)-1]
 576         copyout=lambda: ['    '*len(obstack) +
 577                         ' '.join([ww.output() for ww in w]) +
 578                         '\n']
 579         if keyword=='end-definitions':
 580                 keyword.raw_mark_ok()
 581                 allow_defs=sitelevel.depth
 582                 obstack=[root]
 583                 return copyout()
 584         if keyword=='include':
 585                 if not allow_include:
 586                         complain("include not permitted here")
 587                         return []
 588                 if len(w) != 2:
 589                         complain("include requires one argument")
 590                         return []
 591                 newfile=os.path.join(os.path.dirname(file),w[1].raw_mark_ok())
 592                 # ^ user of "include" is trusted so raw_mark_ok is good
 593                 return pfilepath(newfile,allow_include=allow_include)
 594         if keyword.raw() in levels:
 595                 # We may go up any number of levels, but only down by one
 596                 newdepth=levels[keyword.raw_mark_ok()].depth
 597                 currentdepth=len(obstack) # actually +1...
 598                 if newdepth<=currentdepth:
 599                         obstack=obstack[:newdepth]
 600                 if newdepth>currentdepth:
 601                         complain("May not go from level %d to level %d"%
 602                                 (currentdepth-1,newdepth))
 603                 # See if it's a new one (and whether that's permitted)
 604                 # or an existing one
 605                 current=obstack[len(obstack)-1]
 606                 tname=w[1].name()
 607                 if tname in current.children:
 608                         # Not new
 609                         current=current.children[tname]
 610                         if service and group and current.depth==2:
 611                                 if group!=current.group:
 612                                         complain("Incorrect group!")
 613                                 w[2].groupname()
 614                 else:
 615                         # New
 616                         # Ignore depth check for now
 617                         nl=levels[keyword.raw()](w)
 618                         if nl.depth<allow_defs:
 619                                 complain("New definitions not allowed at "
 620                                         "level %d"%nl.depth)
 621                                 # we risk crashing if we continue
 622                                 sys.exit(1)
 623                         current.children[tname]=nl
 624                         current=nl
 625                 obstack.append(current)
 626                 return copyout()
 627         if keyword.raw() not in current.allow_properties:
 628                 complain("Property %s not allowed at %s level"%
 629                         (keyword.raw(),current.type))
 630                 return []
 631         elif current.depth == vpnlevel.depth < allow_defs:
 632                 complain("Not allowed to set VPN properties here")
 633                 return []
 634         else:
 635                 set_property(current,w)
 636                 return copyout()
 637
 638         complain("unknown keyword '%s'"%(keyword.raw()))
 639
 640 def pfilepath(pathname,allow_include=False):
 641         f=open(pathname)
 642         outlines=pfile(pathname,f.readlines(),allow_include=allow_include)
 643         f.close()
 644         return outlines
 645
 646 def pfile(name,lines,allow_include=False):
 647         "Process a file"
 648         global file,line
 649         file=name
 650         line=0
 651         outlines=[]
 652         for i in lines:
 653                 line=line+1
 654                 if (i[0]=='#'): continue
 655                 outlines += pline(i,allow_include=allow_include)
 656         return outlines
 657
 658 def outputsites(w):
 659         "Output include file for secnet configuration"
 660         w.write("# secnet sites file autogenerated by make-secnet-sites "
 661                 +"version %s\n"%VERSION)
 662         w.write("# %s\n"%time.asctime(time.localtime(time.time())))
 663         w.write("# Command line: %s\n\n"%' '.join(sys.argv))
 664
 665         # Raw VPN data section of file
 666         w.write(prefix+"vpn-data {\n")
 667         for i in root.children.values():
 668                 i.output_data(w,(i,))
 669         w.write("};\n")
 670
 671         # Per-VPN flattened lists
 672         w.write(prefix+"vpn {\n")
 673         for i in root.children.values():
 674                 i.output_vpnflat(w,())
 675         w.write("};\n")
 676
 677         # Flattened list of sites
 678         w.write(prefix+"all-sites %s;\n"%",".join(
 679                 map(lambda x:"%svpn/%s/all-sites"%(prefix,x.kname()),
 680                         root.children.values())))
 681
 682 line=0
 683 file=None
 684 complaints=0
 685
 686 # Sanity check section
 687 # Delete nodes where leaf=0 that have no children
 688
 689 def live(n):
 690         "Number of leafnodes below node n"
 691         if n.leaf: return 1
 692         for i in n.children.keys():
 693                 if live(n.children[i]): return 1
 694         return 0
 695 def delempty(n):
 696         "Delete nodes that have no leafnode children"
 697         for i in list(n.children.keys()):
 698                 delempty(n.children[i])
 699                 if not live(n.children[i]):
 700                         del n.children[i]
 701
 702 # Check that all constraints are met (as far as I can tell
 703 # restrict-nets/networks/peer are the only special cases)
 704
 705 def checkconstraints(n,p,ra):
 706         new_p=p.copy()
 707         new_p.update(n.properties)
 708         for i in n.require_properties.keys():
 709                 if i not in new_p:
 710                         moan("%s %s is missing property %s"%
 711                                 (n.type,n.name,i))
 712         for i in new_p.keys():
 713                 if i not in n.allow_properties:
 714                         moan("%s %s has forbidden property %s"%
 715                                 (n.type,n.name,i))
 716         # Check address range restrictions
 717         if "restrict-nets" in n.properties:
 718                 new_ra=ra.intersection(n.properties["restrict-nets"].set)
 719         else:
 720                 new_ra=ra
 721         if "networks" in n.properties:
 722                 if not n.properties["networks"].set <= new_ra:
 723                         moan("%s %s networks out of bounds"%(n.type,n.name))
 724                 if "peer" in n.properties:
 725                         if not n.properties["networks"].set.contains(
 726                                 n.properties["peer"].addr):
 727                                 moan("%s %s peer not in networks"%(n.type,n.name))
 728         for i in n.children.keys():
 729                 checkconstraints(n.children[i],new_p,new_ra)
 730
 731 if service:
 732         headerinput=pfilepath(header,allow_include=True)
 733         userinput=sys.stdin.readlines()
 734         pfile("user input",userinput)
 735 else:
 736         if inputfile is None:
 737                 pfile("stdin",sys.stdin.readlines())
 738         else:
 739                 pfilepath(inputfile)
 740
 741 delempty(root)
 742 checkconstraints(root,{},ipaddrset.complete_set())
 743
 744 if complaints>0:
 745         if complaints==1: print("There was 1 problem.")
 746         else: print("There were %d problems."%(complaints))
 747         sys.exit(1)
 748 complaints=None # arranges to crash if we complain later
 749
 750 if service:
 751         # Put the user's input into their group file, and rebuild the main
 752         # sites file
 753         f=open(groupfiledir+"/T"+group.groupname(),'w')
 754         f.write("# Section submitted by user %s, %s\n"%
 755                 (user,time.asctime(time.localtime(time.time()))))
 756         f.write("# Checked by make-secnet-sites version %s\n\n"%VERSION)
 757         for i in userinput: f.write(i)
 758         f.write("\n")
 759         f.close()
 760         os.rename(groupfiledir+"/T"+group.groupname(),
 761                   groupfiledir+"/R"+group.groupname())
 762         f=open(sitesfile+"-tmp",'w')
 763         f.write("# sites file autogenerated by make-secnet-sites\n")
 764         f.write("# generated %s, invoked by %s\n"%
 765                 (time.asctime(time.localtime(time.time())),user))
 766         f.write("# use make-secnet-sites to turn this file into a\n")
 767         f.write("# valid /etc/secnet/sites.conf file\n\n")
 768         for i in headerinput: f.write(i)
 769         files=os.listdir(groupfiledir)
 770         for i in files:
 771                 if i[0]=='R':
 772                         j=open(groupfiledir+"/"+i)
 773                         f.write(j.read())
 774                         j.close()
 775         f.write("# end of sites file\n")
 776         f.close()
 777         os.rename(sitesfile+"-tmp",sitesfile)
 778 else:
 779         outputsites(of)