Besides Probe Requests,
which are the other WiFi Mgmt frames that have MAC Address Randomization ?
Probe request -> Probe response
android wifi connection
https://source.android.com/devices/tech/connect/wifi-mac-randomization
"cause the device to use a randomized MAC address when connecting to a Wi-Fi network."
which means AUTH / ASSOC Req / ASSOC response use mac randomization also
Related
Is there a way to use a wireless router as some sort of Access Point + Repeater?
I have a LTE Box with a SIM Card that has a build-in router which is pretty shitty.
I now want to connect a proper router to this LTE Box (via WIFI, since the LTE Box has no LAN Port) to get internet access and then connect only to the router (via LAN Port, since I don't trust in WIFI).
The answer depends on your W-Lan Router.
Some devices got a function called WDS -> Wifi Distributed Service.
You need to specify the signal and the login data for the wlan router who should distribute the original signal.
I am a beginner to iOS and network. What I want to do is sending a broadcast msg to a local network and getting all AP(hotspot) information back, like MAC address. I am just wondering if the AP(server) will automatically send the response back to the sender (like my iPhone) after I send a msg to "255.255.255.255" by Udp.
This is more of a networking question.
In short: use DHCP (RFC 2131) to get the server IP and use ARP (RFC 826) to obtain the MAC address associated to that IP. DHCP is connectionless (UDP), but ARP is a TCP/IP protocol.
The DHCP message (DHCPDISCOVER) will send something like "this is my MAC address(xx:xx:xx:xx:xx:xx), give me an IP addresss!" and the response (DHCPOFFER) from the server will contain the IP of the access point but not the MAC.
To get the MAC address of the AP, use ARP.
ARP stands for Address Resolution Protocol and is the mechanism used in the IP protocol over ethernet to obtain the MAC address of the destination. If the destination IP address belong to the same IP subnetwork the ARP module will send a broadcast ethernet message (ARP query) asking the MAC address of the destination IP address. If the destination is not on your local network the ARP module will send an ARP query using the IP address of your router.
I'm aware that a NIC in promiscuous mode is able to detect packets of wifi enabled devices looking for networks and obtain their MAC addresses, is it still possible to obtain the MAC Address of a device connected to a wifi access point?
Cheers.
Yes, it is possible when the AP is using WEP or no encryption at all. APs using WPA or WPA2 however will encrypt the whole header.
A WEP Wifipackage has the following structure:
Address Fields Depending upon the frame type, the four address fields
will contain a combination of the following address types: BSS
Identifier (BSSID). BSSID uniquely identifies each BSS. When the frame
is from an STA in an infrastructure BSS, the BSSID is the MAC address
of the AP. When the frame is from a STA in an IBSS, the BSSID is the
randomly generated, locally administered MAC address of the STA that
initiated the IBSS.
Destination Address (DA). DA indicates the MAC address of the final
destination to receive the frame.
Source Address (SA). SA indicates the MAC address of the original
source that initially created and transmitted the frame.
Receiver Address (RA). RA indicates the MAC address of the next
immediate STA on the wireless medium to receive the frame.
Transmitter Address (TA). TA indicates the MAC address of the STA that
transmitted the frame onto the wireless medium.
If you want to grab MAC addresses it would be possible to just sniff them from the packages sent in on the different Wi-Fi networks (Using WEP or No encryption).
I am able to establish connection between android and PC via Wi-fi. But this is done by hard coding the the IP address of the PC (server) in the android program. But I wanted to get IP addresses of the PC's available on the Wi-fi network programmatically. So please let me know how to scan for PC's on the network and get their respective IP address.
can you not multicast a UDP packet on the network which the server listens for and responds to with a packet containing the ip address of the server in order to set up the connection?
You should be able to find help on that topic, with some options here here and here
I got a WiFi router connected to my PC.
What I want is to send from another device some data to my PC through the Wi-Fi adapter.
Program on the device is developed using EVC++. The one on PC - on VC++.
EDIT 1:
PC has an IP address.
Another device s IP is set at program execution. I mean WiFi IP address. And then connection to WiFi router is proceeded.
EDIT 2:
What if it uses an ethernet and wifi together?
How should I make a connection through WiFi?
WiFI is no different to usual Ethernel network.
So you just usually find out IP of other computer (in config/ask user/DNS), establish usual TCP/IP connection and send data on.