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Adding the channel check to prevent interferences

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This commit is contained in:
Félix Aime 2021-06-08 11:49:53 +02:00
parent 9f75d339da
commit 61de73d989
1 changed files with 355 additions and 337 deletions
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18
server/frontend/app/classes/network.py
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@ -4,6 +4,7 @@
import subprocess as sp import subprocess as sp
import netifaces as ni import netifaces as ni
import requests as rq import requests as rq
import re
import sys import sys
import time import time
import qrcode import qrcode
@ -214,11 +215,13 @@ class Network(object):
:return: bool - if hostapd configuration file created :return: bool - if hostapd configuration file created
""" """
try: try:
chan = self.set_ap_channel()
with open("{}/app/assets/hostapd.conf".format(sys.path[0]), "r") as f: with open("{}/app/assets/hostapd.conf".format(sys.path[0]), "r") as f:
conf = f.read() conf = f.read()
conf = conf.replace("{IFACE}", self.iface_in) conf = conf.replace("{IFACE}", self.iface_in)
conf = conf.replace("{SSID}", self.AP_SSID) conf = conf.replace("{SSID}", self.AP_SSID)
conf = conf.replace("{PASS}", self.AP_PASS) conf = conf.replace("{PASS}", self.AP_PASS)
conf = conf.replace("{CHAN}", chan)
with open("/tmp/hostapd.conf", "w") as c: with open("/tmp/hostapd.conf", "w") as c:
c.write(conf) c.write(conf)
return True return True
@ -335,3 +338,18 @@ class Network(object):
return True return True
except: except:
return False return False
def set_ap_channel(self):
"""
Deduce the channel to have for the AP in order to prevent
kind of jamming between the two wifi interfaces.
"""
# Get the channel of the connected interface
sh = sp.Popen(["iw", self.iface_out, "info"],
stdout=sp.PIPE, stderr=sp.PIPE).communicate()
res = re.search("channel ([0-9]{1,2})", sh[0].decode('utf8'))
chn = res.group(1)
# Return a good candidate.
return "11" if int(chn) < 7 else "1"