summaryrefslogtreecommitdiffstats
path: root/dbparse.py
blob: 993f757b2cb1b305c32eee0a53a94511ab58faa6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
#!/usr/bin/env python

from builtins import bytes
from functools import total_ordering
import sys, math
from math import ceil, log
from collections import defaultdict, OrderedDict

# must match <linux/nl80211.h> enum nl80211_reg_rule_flags

flag_definitions = {
    'NO-OFDM':		1<<0,
    'NO-CCK':		1<<1,
    'NO-INDOOR':	1<<2,
    'NO-OUTDOOR':	1<<3,
    'DFS':		1<<4,
    'PTP-ONLY':		1<<5,
    'PTMP-ONLY':	1<<6,
    'NO-IR':	        1<<7,
    # hole at bit 8
    # hole at bit 9. FIXME: Where is NO-HT40 defined?
    'NO-HT40':		1<<10,
    'AUTO-BW':		1<<11,
}

dfs_regions = {
    'DFS-FCC':		1,
    'DFS-ETSI':		2,
    'DFS-JP':		3,
}

@total_ordering

class WmmRule(object):

    def __init__(self, vo_c, vi_c, be_c, bk_c, vo_ap, vi_ap, be_ap, bk_ap):
        self.vo_c = vo_c
        self.vi_c = vi_c
        self.be_c = be_c
        self.bk_c = bk_c
        self.vo_ap = vo_ap
        self.vi_ap = vi_ap
        self.be_ap = be_ap
        self.bk_ap = bk_ap

    def _as_tuple(self):
        return (self.vo_c, self.vi_c, self.be_c, self.bk_c,
                self.vo_ap, self.vi_ap, self.be_ap, self.bk_ap)

    def __eq__(self, other):
        if other is None:
            return False
        return (self._as_tuple() == other._as_tuple())

    def __ne__(self, other):
        return not (self == other)

    def __lt__(self, other):
        if other is None:
            return False
        return (self._as_tuple() < other._as_tuple())

    def __hash__(self):
        return hash(self._as_tuple())

class FreqBand(object):
    def __init__(self, start, end, bw, comments=None):
        self.start = start
        self.end = end
        self.maxbw = bw
        self.comments = comments or []

    def _as_tuple(self):
        return (self.start, self.end, self.maxbw)

    def __eq__(self, other):
        return (self._as_tuple() == other._as_tuple())

    def __ne__(self, other):
        return not (self == other)

    def __lt__(self, other):
        return (self._as_tuple() < other._as_tuple())

    def __hash__(self):
        return hash(self._as_tuple())

    def __str__(self):
        return '<FreqBand %.3f - %.3f @ %.3f>' % (
                  self.start, self.end, self.maxbw)

@total_ordering
class PowerRestriction(object):
    def __init__(self, max_ant_gain, max_eirp, comments = None):
        self.max_ant_gain = max_ant_gain
        self.max_eirp = max_eirp
        self.comments = comments or []

    def _as_tuple(self):
        return (self.max_ant_gain, self.max_eirp)

    def __eq__(self, other):
        return (self._as_tuple() == other._as_tuple())

    def __ne__(self, other):
        return not (self == other)

    def __lt__(self, other):
        return (self._as_tuple() < other._as_tuple())

    def __hash__(self):
        return hash(self._as_tuple())

    def __str__(self):
        return '<PowerRestriction ...>'

class DFSRegionError(Exception):
    def __init__(self, dfs_region):
        self.dfs_region = dfs_region

class FlagError(Exception):
    def __init__(self, flag):
        self.flag = flag

@total_ordering
class Permission(object):
    def __init__(self, freqband, power, flags, wmmrule):
        assert isinstance(freqband, FreqBand)
        assert isinstance(power, PowerRestriction)
        assert isinstance(wmmrule, WmmRule) or wmmrule is None
        self.freqband = freqband
        self.power = power
        self.wmmrule = wmmrule
        self.flags = 0
        for flag in flags:
            if not flag in flag_definitions:
                raise FlagError(flag)
            self.flags |= flag_definitions[flag]
        self.textflags = flags

    def _as_tuple(self):
        return (self.freqband, self.power, self.flags, self.wmmrule)

    def __eq__(self, other):
        return (self._as_tuple() == other._as_tuple())

    def __ne__(self, other):
        return not (self == other)

    def __lt__(self, other):
        return (self._as_tuple() < other._as_tuple())

    def __hash__(self):
        return hash(self._as_tuple())

    def __str__(self):
        return str(self.freqband) + str(self.power) + str(self.wmmrule)

class Country(object):
    def __init__(self, dfs_region, permissions=None, comments=None):
        self._permissions = permissions or []
        self.comments = comments or []
        self.dfs_region = 0

        if dfs_region:
            if not dfs_region in dfs_regions:
                raise DFSRegionError(dfs_region)
            self.dfs_region = dfs_regions[dfs_region]

    def add(self, perm):
        assert isinstance(perm, Permission)
        self._permissions.append(perm)
        self._permissions.sort()

    def __contains__(self, perm):
        assert isinstance(perm, Permission)
        return perm in self._permissions

    def __str__(self):
        r = ['(%s, %s)' % (str(b), str(p)) for b, p in self._permissions]
        return '<Country (%s)>' % (', '.join(r))

    def _get_permissions_tuple(self):
        return tuple(self._permissions)
    permissions = property(_get_permissions_tuple)

class SyntaxError(Exception):
    pass

class DBParser(object):
    def __init__(self, warn=None):
        self._warn_callout = warn or sys.stderr.write

    def _syntax_error(self, txt=None):
        txt = txt and ' (%s)' % txt or ''
        raise SyntaxError("Syntax error in line %d%s" % (self._lineno, txt))

    def _warn(self, txt):
        self._warn_callout("Warning (line %d): %s\n" % (self._lineno, txt))

    def _parse_band_def(self, bname, banddef, dupwarn=True):
        try:
            freqs, bw = banddef.split('@')
            bw = float(bw)
        except ValueError:
            bw = 20.0

        try:
            start, end = freqs.split('-')
            start = float(start)
            end = float(end)
            # The kernel will reject these, so might as well reject this
            # upon building it.
            if start <= 0:
                self._syntax_error("Invalid start freq (%d)" % start)
            if end <= 0:
                self._syntax_error("Invalid end freq (%d)" % end)
            if start > end:
                self._syntax_error("Inverted freq range (%d - %d)" % (start, end))
            if start == end:
                self._syntax_error("Start and end freqs are equal (%d)" % start)
        except ValueError:
            self._syntax_error("band must have frequency range")

        b = FreqBand(start, end, bw, comments=self._comments)
        self._comments = []
        self._banddup[bname] = bname
        if b in self._bandrev:
            if dupwarn:
                self._warn('Duplicate band definition ("%s" and "%s")' % (
                              bname, self._bandrev[b]))
            self._banddup[bname] = self._bandrev[b]
        self._bands[bname] = b
        self._bandrev[b] = bname
        self._bandline[bname] = self._lineno

    def _parse_band(self, line):
        try:
            bname, line = line.split(':', 1)
            if not bname:
                self._syntax_error("'band' keyword must be followed by name")
        except ValueError:
            self._syntax_error("band name must be followed by colon")

        if bname in flag_definitions:
            self._syntax_error("Invalid band name")

        self._parse_band_def(bname, line)

    def _parse_power(self, line):
        try:
            pname, line = line.split(':', 1)
            if not pname:
                self._syntax_error("'power' keyword must be followed by name")
        except ValueError:
            self._syntax_error("power name must be followed by colon")

        if pname in flag_definitions:
            self._syntax_error("Invalid power name")

        self._parse_power_def(pname, line)

    def _parse_power_def(self, pname, line, dupwarn=True):
        try:
            max_eirp = line
            if max_eirp == 'N/A':
                max_eirp = '0'
            max_ant_gain = float(0)
            def conv_pwr(pwr):
                if pwr.endswith('mW'):
                    pwr = float(pwr[:-2])
                    return 10.0 * math.log10(pwr)
                else:
                    return float(pwr)
            max_eirp = conv_pwr(max_eirp)
        except ValueError:
            self._syntax_error("invalid power data")

        p = PowerRestriction(max_ant_gain, max_eirp,
                             comments=self._comments)
        self._comments = []
        self._powerdup[pname] = pname
        if p in self._powerrev:
            if dupwarn:
                self._warn('Duplicate power definition ("%s" and "%s")' % (
                              pname, self._powerrev[p]))
            self._powerdup[pname] = self._powerrev[p]
        self._power[pname] = p
        self._powerrev[p] = pname
        self._powerline[pname] = self._lineno

    def _parse_wmmrule(self, line):
        regions = line[:-1].strip()
        if not regions:
            self._syntax_error("'wmmrule' keyword must be followed by region")

        regions = regions.split(',')

        self._current_regions = {}
        for region in regions:
            if region in self._wmm_rules:
                self._warn("region %s was added already to wmm rules" % region)
            self._current_regions[region] = 1
        self._comments = []

    def _validate_input(self, cw_min, cw_max, aifsn, cot):
        if  cw_min < 1:
            self._syntax_error("Invalid cw_min value (%d)" % cw_min)
        if cw_max < 1:
            self._syntax_error("Invalid cw_max value (%d)" % cw_max)
        if cw_min > cw_max:
            self._syntax_error("Inverted contention window (%d - %d)" %
                    (cw_min, cw_max))
        if not (bin(cw_min + 1).count('1') == 1 and cw_min < 2**15):
            self._syntax_error("Invalid cw_min value should be power of 2 - 1 (%d)"
                    % cw_min)
        if not (bin(cw_max + 1).count('1') == 1 and cw_max < 2**15):
            self._syntax_error("Invalid cw_max value should be power of 2 - 1 (%d)"
                    % cw_max)
        if aifsn < 1:
            self._syntax_error("Invalid aifsn value (%d)" % aifsn)
        if cot < 0:
            self._syntax_error("Invalid cot value (%d)" % cot)


    def _validate_size(self, var, bytcnt):
        return bytcnt < ceil(len(bin(var)[2:]) / 8.0)

    def _parse_wmmrule_item(self, line):
        bytcnt = (2.0, 2.0, 1.0, 2.0)
        try:
            ac, cval = line.split(':')
            if not ac:
                self._syntax_error("wmm item must have ac prefix")
        except ValueError:
                self._syntax_error("access category must be followed by colon")
        p = tuple([int(v.split('=', 1)[1]) for v in cval.split(',')])
        self._validate_input(*p)
        for v, b in zip(p, bytcnt):
            if self._validate_size(v, b):
                self._syntax_error("unexpected input size expect %d got %d"
                        % (b, v))

            for r in self._current_regions:
                self._wmm_rules[r][ac] = p

    def _parse_country(self, line):
        try:
            cname, cvals= line.split(':', 1)
            dfs_region = cvals.strip()
            if not cname:
                self._syntax_error("'country' keyword must be followed by name")
        except ValueError:
            self._syntax_error("country name must be followed by colon")

        cnames = cname.split(',')

        self._current_countries = {}
        for cname in cnames:
            if len(cname) != 2:
                self._warn("country '%s' not alpha2" % cname)
            cname = bytes(cname, 'ascii')
            if not cname in self._countries:
                self._countries[cname] = Country(dfs_region, comments=self._comments)
            self._current_countries[cname] = self._countries[cname]
        self._comments = []

    def _parse_country_item(self, line):
        if line[0] == '(':
            try:
                band, line = line[1:].split('),', 1)
                bname = 'UNNAMED %d' % self._lineno
                self._parse_band_def(bname, band, dupwarn=False)
            except:
                self._syntax_error("Badly parenthesised band definition")
        else:
            try:
                bname, line = line.split(',', 1)
                if not bname:
                    self._syntax_error("country definition must have band")
                if not line:
                    self._syntax_error("country definition must have power")
            except ValueError:
                self._syntax_error("country definition must have band and power")

        if line[0] == '(':
            items = line.split('),', 1)
            if len(items) == 1:
                pname = items[0]
                line = ''
                if not pname[-1] == ')':
                    self._syntax_error("Badly parenthesised power definition")
                pname = pname[:-1]
                flags = []
            else:
                pname = items[0]
                flags = items[1].split(',')
            power = pname[1:]
            pname = 'UNNAMED %d' % self._lineno
            self._parse_power_def(pname, power, dupwarn=False)
        else:
            line = line.split(',')
            pname = line[0]
            flags = line[1:]
        w = None
        if flags and 'wmmrule' in flags[-1]:
            try:
                region = flags.pop().split('=', 1)[1]
                if region not in self._wmm_rules.keys():
                    self._syntax_error("No wmm rule for %s" % region)
            except IndexError:
                self._syntax_error("flags is empty list or no region was found")
            w = WmmRule(*self._wmm_rules[region].values())

        if not bname in self._bands:
            self._syntax_error("band does not exist")
        if not pname in self._power:
            self._syntax_error("power does not exist")
        self._bands_used[bname] = True
        self._power_used[pname] = True
        # de-duplicate so binary database is more compact
        bname = self._banddup[bname]
        pname = self._powerdup[pname]
        b = self._bands[bname]
        p = self._power[pname]
        try:
            perm = Permission(b, p, flags, w)
        except FlagError as e:
            self._syntax_error("Invalid flag '%s'" % e.flag)
        for cname, c in self._current_countries.items():
            if perm in c:
                self._warn('Rule "%s, %s" added to "%s" twice' % (
                              bname, pname, cname))
            else:
                c.add(perm)

    def parse(self, f):
        self._current_countries = None
        self._current_regions = None
        self._bands = {}
        self._power = {}
        self._countries = {}
        self._bands_used = {}
        self._power_used = {}
        self._bandrev = {}
        self._powerrev = {}
        self._banddup = {}
        self._powerdup = {}
        self._bandline = {}
        self._powerline = {}
        self._wmm_rules = defaultdict(lambda: OrderedDict())

        self._comments = []

        self._lineno = 0
        for line in f:
            self._lineno += 1
            line = line.strip()
            if line[0:1] == '#':
                self._comments.append(line[1:].strip())
            line = line.replace(' ', '').replace('\t', '')
            if not line:
                self._current_regions = None
                self._comments = []
            line = line.split('#')[0]
            if not line:
                continue
            if line[0:4] == 'band':
                self._parse_band(line[4:])
                self._current_countries = None
                self._current_regions = None
                self._comments = []
            elif line[0:5] == 'power':
                self._parse_power(line[5:])
                self._current_countries = None
                self._current_regions = None
                self._comments = []
            elif line[0:7] == 'country':
                self._parse_country(line[7:])
                self._comments = []
                self._current_regions = None
            elif self._current_countries is not None:
                self._current_regions = None
                self._parse_country_item(line)
                self._comments = []
            elif line[0:7] == 'wmmrule':
                self._parse_wmmrule(line[7:])
                self._current_countries = None
                self._comments = []
            elif self._current_regions is not None:
                self._parse_wmmrule_item(line)
                self._current_countries = None
                self._comments = []
            else:
                self._syntax_error("Expected band, power or country definition")

        countries = self._countries
        bands = {}
        for k, v in self._bands.items():
            if k in self._bands_used:
                bands[self._banddup[k]] = v
                continue
            # we de-duplicated, but don't warn again about the dupes
            if self._banddup[k] == k:
                self._lineno = self._bandline[k]
                self._warn('Unused band definition "%s"' % k)
        power = {}
        for k, v in self._power.items():
            if k in self._power_used:
                power[self._powerdup[k]] = v
                continue
            # we de-duplicated, but don't warn again about the dupes
            if self._powerdup[k] == k:
                self._lineno = self._powerline[k]
                self._warn('Unused power definition "%s"' % k)
        return countries