find country code in regdb-wireless

find_wifi_channel.py

#!/usr/bin/env python3
from typing import Optional, TypeAlias
import dbparse
import enum

class Flags(enum.IntFlag):
	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
	NO_HT40    = 1<<10
	AUTO_BW    = 1<<11

Interval: TypeAlias = tuple[int, int]

def intersect(a: Interval, b: Interval) -> Optional[Interval]:
	if b[0] > a[1] or a[0] > b[1]:
		return None
	return max(a[0], b[0]), min(a[1], b[1])

FREQ_OF_INTEREST = (5170, 5330)
# FREQ_OF_INTEREST = (5330, 5490)
# FREQ_OF_INTEREST = (5490, 5650)
# FREQ_OF_INTEREST = (5735, 5895)

p = dbparse.DBParser()
countries = p.parse(open('db.txt', 'r', encoding='utf-8'))
for country_id, country in countries.items():
	print(country_id.decode())
	for permission in country._permissions:
		freqband = permission.freqband
		if intersect((freqband.start, freqband.end), FREQ_OF_INTEREST):
			print(freqband, permission.power._as_tuple(), 'WmmRule' if permission.wmmrule is not None else '', repr(Flags(permission.flags)))

5GHz 160MHz (not 80+80) w/o DFS

CC   Ch.   Tx Flags
ID  36-64  23 NO-OUTDOOR
RU  36-64  20 NO-OUTDOOR
GT 100-128 23 NO-OUTDOOR
PA 100-128 30
ZA 100-128 30

2.4GHz 40MHz w/ high TxPower

AU <FreqBand 2400.000 - 2483.500 @ 40.000> (0.0, 36.020599913279625)  <Flags: 0>
HK <FreqBand 2400.000 - 2483.500 @ 40.000> (0.0, 36.0)  <Flags: 0>
NZ <FreqBand 2400.000 - 2483.500 @ 40.000> (0.0, 36.0)  <Flags: 0>
PA <FreqBand 2400.000 - 2483.500 @ 40.000> (0.0, 36.0)  <Flags: 0>