OVMS3-idf/tools/esp_prov/prov/wifi_scan.py

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# Copyright 2018 Espressif Systems (Shanghai) PTE LTD
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# APIs for interpreting and creating protobuf packets for Wi-Fi Scanning
from __future__ import print_function
from future.utils import tobytes
import utils
import proto
def print_verbose(security_ctx, data):
if (security_ctx.verbose):
print("++++ " + data + " ++++")
def scan_start_request(security_ctx, blocking=True, passive=False, group_channels=5, period_ms=120):
# Form protobuf request packet for ScanStart command
cmd = proto.wifi_scan_pb2.WiFiScanPayload()
cmd.msg = proto.wifi_scan_pb2.TypeCmdScanStart
cmd.cmd_scan_start.blocking = blocking
cmd.cmd_scan_start.passive = passive
cmd.cmd_scan_start.group_channels = group_channels
cmd.cmd_scan_start.period_ms = period_ms
enc_cmd = security_ctx.encrypt_data(cmd.SerializeToString()).decode('latin-1')
print_verbose(security_ctx, "Client -> Device (Encrypted CmdScanStart) " + utils.str_to_hexstr(enc_cmd))
return enc_cmd
def scan_start_response(security_ctx, response_data):
# Interpret protobuf response packet from ScanStart command
dec_resp = security_ctx.decrypt_data(tobytes(response_data))
resp = proto.wifi_scan_pb2.WiFiScanPayload()
resp.ParseFromString(dec_resp)
print_verbose(security_ctx, "ScanStart status " + str(resp.status))
if resp.status != 0:
raise RuntimeError
def scan_status_request(security_ctx):
# Form protobuf request packet for ScanStatus command
cmd = proto.wifi_scan_pb2.WiFiScanPayload()
cmd.msg = proto.wifi_scan_pb2.TypeCmdScanStatus
enc_cmd = security_ctx.encrypt_data(cmd.SerializeToString()).decode('latin-1')
print_verbose(security_ctx, "Client -> Device (Encrypted CmdScanStatus) " + utils.str_to_hexstr(enc_cmd))
return enc_cmd
def scan_status_response(security_ctx, response_data):
# Interpret protobuf response packet from ScanStatus command
dec_resp = security_ctx.decrypt_data(tobytes(response_data))
resp = proto.wifi_scan_pb2.WiFiScanPayload()
resp.ParseFromString(dec_resp)
print_verbose(security_ctx, "ScanStatus status " + str(resp.status))
if resp.status != 0:
raise RuntimeError
return {"finished": resp.resp_scan_status.scan_finished, "count": resp.resp_scan_status.result_count}
def scan_result_request(security_ctx, index, count):
# Form protobuf request packet for ScanResult command
cmd = proto.wifi_scan_pb2.WiFiScanPayload()
cmd.msg = proto.wifi_scan_pb2.TypeCmdScanResult
cmd.cmd_scan_result.start_index = index
cmd.cmd_scan_result.count = count
enc_cmd = security_ctx.encrypt_data(cmd.SerializeToString()).decode('latin-1')
print_verbose(security_ctx, "Client -> Device (Encrypted CmdScanResult) " + utils.str_to_hexstr(enc_cmd))
return enc_cmd
def scan_result_response(security_ctx, response_data):
# Interpret protobuf response packet from ScanResult command
dec_resp = security_ctx.decrypt_data(tobytes(response_data))
resp = proto.wifi_scan_pb2.WiFiScanPayload()
resp.ParseFromString(dec_resp)
print_verbose(security_ctx, "ScanResult status " + str(resp.status))
if resp.status != 0:
raise RuntimeError
authmode_str = ["Open", "WEP", "WPA_PSK", "WPA2_PSK", "WPA_WPA2_PSK", "WPA2_ENTERPRISE"]
results = []
for entry in resp.resp_scan_result.entries:
results += [{"ssid": entry.ssid.decode('latin-1').rstrip('\x00'),
"bssid": utils.str_to_hexstr(entry.bssid.decode('latin-1')),
"channel": entry.channel,
"rssi": entry.rssi,
"auth": authmode_str[entry.auth]}]
print_verbose(security_ctx, "ScanResult SSID : " + str(results[-1]["ssid"]))
print_verbose(security_ctx, "ScanResult BSSID : " + str(results[-1]["bssid"]))
print_verbose(security_ctx, "ScanResult Channel : " + str(results[-1]["channel"]))
print_verbose(security_ctx, "ScanResult RSSI : " + str(results[-1]["rssi"]))
print_verbose(security_ctx, "ScanResult AUTH : " + str(results[-1]["auth"]))
return results