I found many samples on how to get a hostname by an IP address, how can I get the IP address of a host in the LAN?
Try this
public static void DoGetHostAddresses(string hostname)
{
IPAddress[] ips;
ips = Dns.GetHostAddresses(hostname);
Console.WriteLine("GetHostAddresses({0}) returns:", hostname);
foreach (IPAddress ip in ips)
{
Console.WriteLine(" {0}", ip);
}
}
i got this from http://msdn.microsoft.com/en-us/library/system.net.dns.gethostaddresses.aspx
Here is simple code if you want to get the IP Address(V4) from your pc.
Import this library into your class
using System.Net;
Initialize and declare these variables into your codes. They contain hostname, ipaddress and an array of Host Addresses:
string HostName = Dns.GetHostName().ToString();
IPAddress[] IpInHostAddress = Dns.GetHostAddresses(HostName);
string IPV4Address = IpInHostAddress[1].ToString(); //Default IPV4Address. This might be the ip address you need to retrieve
string IPV6Address = IpInHostAddress[0].ToString(); //Default Link local IPv6 Address
Open your command prompt, just type "ipconfig" and press enter.Once you are done, you could check if the string IPV4Address matches to IPv4Address in our pc.
As long as you know the name of a machine, you can use Dns.GetHostAddresses. Your network DNS should recognize it as LAN computer and return proper IP.
Use Dns.GetHostEntry(hostname) instead of obsolete Dns.GetHostAddresses.
Here is an excellent example of how it is doing: http://www.codeproject.com/Articles/854/How-To-Get-IP-Address-Of-A-Machine
you could use the windows management classes to do this, it also works for remote machines that are in the same domain (but I don't know if they need to enable or disable any security or policy settings for this to work). for example:
public List<NetworkAdapter> GetAdapterList()
{
ManagementClass mgmt = new ManagementClass("Win32_NetworkAdapterConfiguration ");
ManagementObjectCollection moc = mgmt.GetInstances();
List<NetworkAdapter> adapters = new List<NetworkAdapter>();
// Search for adapters with IP addresses
foreach(ManagementObject mob in moc)
{
string[] addresses = (string[])mob.Properties["IPAddress"].Value;
if (null == addresses)
{
continue;
}
NetworkAdapter na = new NetworkAdapter();
na.Description = (string) mob.Properties["Description"].Value;
na.MacAddress = (string) mob.Properties["MACAddress"].Value;
na.IPAddresses = addresses;
adapters.Add(na);
}
return adapters;
}
and to access a remote machine create the management class like this instead:
ManagementClass mgmt = new ManagementClass
(\\\\servername\\root\\cimv2:Win32_NetworkAdapterConfiguration);
this approach may get you more IPs than just the ones that have been registered in the DNS.
Related
I have a WCF service.
How can i know if the call to my service comes from local machine or a machine from network?
Thanks,
Adrya
You could check the IP of the caller. If it is from the local machine should be "127.0.0.1".
You can get the IP of the caller (the remote address) from the OperationContext object.
More info here:
http://www.danrigsby.com/blog/index.php/2008/05/21/get-the-clients-address-in-wcf/
I'd compile a list at startup of ALL the known IP addresses on the local machine using something like....
NetworkInterface[] nis = NetworkInterface.GetAllNetworkInterfaces();
List<string> addressList = new List<string>();
foreach (NetworkInterface ni in nis)
{
IPInterfaceProperties iip = ni.GetIPProperties();
UnicastIPAddressInformationCollection unis = iip.UnicastAddresses;
foreach (UnicastIPAddressInformation uni in unis)
{
string address = uni.Address.ToString();
addressList.Add(address);
}
}
and then check the addressList to see if it contains the 'remote' IP address.
That should cover any request presenting itself from the local machine with an IP addy other than 127.0.0.1.
Is there any way i can retrieve MAC Address when Network Adapter is disabled in .net?
Thanks in advance,
It is not possible to get the MAC address of an adapter which is disabled: this is because getting the MAC address requires querying the driver, and the driver for a disabled adapter is not loaded (source).
You can, however get the MAC address of an adapter which is not currently connected.
The WMI route is no good here, because it shows the MAC address as null for adapters which are not connected. The good news is that the NetworkInterface.GetAllNetworkInterfaces() route works just fine:
// using System.Net.NetworkInformation;
var nics = NetworkInterface.GetAllNetworkInterfaces();
// pick your NIC!
var selectedNic = nics.First();
var macAddress = selectedNic.GetPhysicalAddress().ToString();
Refer this link.
http://msdn.microsoft.com/en-us/library/system.net.networkinformation.physicaladdress.aspx
The example here displays physical address of all interface irrespective of their operational stage. HTH.
You can use WMI:
public static string GetMACAddress()
{
ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
ManagementObjectCollection moc = mc.GetInstances();
string MACAddress=String.Empty;
foreach(ManagementObject mo in moc)
{
if(MACAddress==String.Empty) // only return MAC Address from first card
{
MACAddress= mo["MacAddress"].ToString() ;
}
mo.Dispose();
}
return MACAddress;
}
Using MS PowerShell command get-NetAdapter one can get the disabled network adapter's MAC Address.
More info at get-NetAdapter
I have the following code:
Dim ipAdd As IPAddress = Dns.GetHostEntry(strHostname).AddressList(0)
Dim strIP As String = ipAdd.ToString()
When I convert to String instead of an IPv4 address like 192.168.1.0 or similar I get the IPv6 version: fd80::5dbe:5d89:e51b:d313 address.
Is there a way I can return the IPv4 address from IPAddress type?
Thanks
Instead of unconditionally taking the first element of the AddressList, you could take the first IPv4 address:
var address = Dns.GetHostEntry(strHostname)
.AddressList
.First(ip => ip.AddressFamily == AddressFamily.InterNetwork);
dtb's solution will work in many situations. In many cases, however, users may have multiple v4 IPs setup on their system. Sometimes this is because they have some 'virtual' adapters (from applications like VirtualBox or VMWare) or because they have more than one physical network adapter connected to their computer.
It goes without saying that in these situations it's important that the correct IP is used. You may want to consider asking the user which IP is appropriate.
To get a list of usable v4 IPs you can use code similar to:
'Get an array which contains all available IPs:
Dim IPList() As IPAddress = Net.Dns.GetHostEntry(Net.Dns.GetHostName.ToString).AddressList
'Copy valid IPs from IPList to FinalIPList
Dim FinalIPList As New ArrayList(IPList.Length)
For Each IP As IPAddress In IPList
'We want to keep IPs only if they are IPv4 and not a 'LoopBack' device
'(an InterNetwork AddressFamily indicates a v4 IP)
If ((Not IPAddress.IsLoopback(IP)) And (IP.AddressFamily = AddressFamily.InterNetwork)) Then
FinalIPList.Add(IP)
End If
Next IP
For me the solution with the "First" predicate did not work properly, this is the code that works for me:
public static string GetLocalIP()
{
string ipv4Address = String.Empty;
foreach (IPAddress currrentIPAddress in Dns.GetHostAddresses(Dns.GetHostName()))
{
if (currrentIPAddress.AddressFamily.ToString() == System.Net.Sockets.AddressFamily.InterNetwork.ToString())
{
ipv4Address = currrentIPAddress.ToString();
break;
}
}
return ipv4Address;
}
I want to get the current IP address of the computer that has say 3 virtual machines (VM Ware) installed. I want to get LAN address of that computer.
current code that i have returns me an array but how to identify current computer lan address ?
public static string getThisCompIPAddress()
{
IPAddress[] addresslist = Dns.GetHostAddresses(Dns.GetHostName());
return (addresslist[0].ToString());
}
addresslist returns an array of 3 IP addresses
You could try the NetworkInterface class, and try to match the name or physical address of the LAN connection to find out the real one. Maybe searching within this class and it's members you can find something that suits your needs.
Here is a simple method to provide some usage info:
using System.Net.NetworkInformation;
...
static void ViewNetworkInfo()
{
NetworkInterface[] networks = NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface nw in networks)
{
Console.WriteLine(nw.Name);
Console.WriteLine(nw.GetPhysicalAddress().ToString());
IPInterfaceProperties ipProps = nw.GetIPProperties();
foreach (UnicastIPAddressInformation ucip in ipProps.UnicastAddresses)
{
Console.WriteLine(ucip.Address.ToString());
}
Console.WriteLine();
}
Console.ReadKey();
}
I've tried all of the solutions above but couldn't get the ip from my "real" machine and not the virtual one. I've managed to use this to get the IP from my virtual machine:
IPAddress[] addresslist = Dns.GetHostAddresses(Environment.ExpandEnvironmentVariables("%CLIENTNAME%"));
The reason why I used it this way is that the function Dns.GetHostAddresses return the adresses of the given host, so if you use the Dns.GetHostName() function it will return the virtual-machine name and not the local machine, but using the name of the machine where you can find using the: Environment.ExpandEnvironmentVariables("%CLIENTNAME%") you can get the client name and not the virtual-machine name, this way you can get the real IP of your local machine.
I hope this helps.
public static ArrayList getThisCompIPAddress()
{
ArrayList strArrIpAdrs = new ArrayList();
ArrayList srtIPAdrsToReturn = new ArrayList();
addresslist = Dns.GetHostAddresses(Dns.GetHostName());
for (int i = 0; i < addresslist.Length; i++)
{
try
{
long ip = addresslist[i].Address;
strArrIpAdrs.Add(addresslist[i]);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
foreach (IPAddress ipad in strArrIpAdrs)
{
lastIndexOfDot = ipad.ToString().LastIndexOf('.');
substring = ipad.ToString().Substring(0, ++lastIndexOfDot);
if (!(srtIPAdrsToReturn.Contains(substring)) && !(substring.Equals("")))
{
srtIPAdrsToReturn.Add(substring);
}
}
return srtIPAdrsToReturn;
}
this is 100% working, the real problem was that it was throwing error while calculating Address that returns long. Error Code is 10045
I need to get the actual local network IP address of the computer (e.g. 192.168.0.220) from my program using C# and .NET 3.5. I can't just use 127.0.0.1 in this case.
How can I accomplish this?
If you are looking for the sort of information that the command line utility, ipconfig, can provide, you should probably be using the System.Net.NetworkInformation namespace.
This sample code will enumerate all of the network interfaces and dump the addresses known for each adapter.
using System;
using System.Net;
using System.Net.NetworkInformation;
class Program
{
static void Main(string[] args)
{
foreach ( NetworkInterface netif in NetworkInterface.GetAllNetworkInterfaces() )
{
Console.WriteLine("Network Interface: {0}", netif.Name);
IPInterfaceProperties properties = netif.GetIPProperties();
foreach ( IPAddress dns in properties.DnsAddresses )
Console.WriteLine("\tDNS: {0}", dns);
foreach ( IPAddressInformation anycast in properties.AnycastAddresses )
Console.WriteLine("\tAnyCast: {0}", anycast.Address);
foreach ( IPAddressInformation multicast in properties.MulticastAddresses )
Console.WriteLine("\tMultiCast: {0}", multicast.Address);
foreach ( IPAddressInformation unicast in properties.UnicastAddresses )
Console.WriteLine("\tUniCast: {0}", unicast.Address);
}
}
}
You are probably most interested in the UnicastAddresses.
Using Dns requires that your computer be registered with the local DNS server, which is not necessarily true if you're on a intranet, and even less likely if you're at home with an ISP. It also requires a network roundtrip -- all to find out info about your own computer.
The proper way:
NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
foreach(NetworkInterface adapter in nics)
{
foreach(var x in adapter.GetIPProperties().UnicastAddresses)
{
if (x.Address.AddressFamily == AddressFamily.InterNetwork && x.IsDnsEligible)
{
Console.WriteLine(" IPAddress ........ : {0:x}", x.Address.ToString());
}
}
}
(UPDATE 31-Jul-2015: Fixed some problems with the code)
Or for those who like just a line of Linq:
NetworkInterface.GetAllNetworkInterfaces()
.SelectMany(adapter=> adapter.GetIPProperties().UnicastAddresses)
.Where(adr=>adr.Address.AddressFamily == AddressFamily.InterNetwork && adr.IsDnsEligible)
.Select (adr => adr.Address.ToString());
In How to get IP addresses in .NET with a host name by John Spano, it says to add the System.Net namespace, and use the following code:
//To get the local IP address
string sHostName = Dns.GetHostName ();
IPHostEntry ipE = Dns.GetHostByName (sHostName);
IPAddress [] IpA = ipE.AddressList;
for (int i = 0; i < IpA.Length; i++)
{
Console.WriteLine ("IP Address {0}: {1} ", i, IpA[i].ToString ());
}
As a machine can have multiple ip addresses, the correct way to figure out your ip address that you're going to be using to route to the general internet is to open a socket to a host on the internet, then inspect the socket connection to see what the local address that is being used in that connection is.
By inspecting the socket connection, you will be able to take into account weird routing tables, multiple ip addresses and whacky hostnames. The trick with the hostname above can work, but I wouldn't consider it entirely reliable.
If you know there are one or more IPv4 addresses for your computer, this will provide one of them:
Dns.GetHostAddresses(Dns.GetHostName())
.First(a => a.AddressFamily == AddressFamily.InterNetwork).ToString()
GetHostAddresses normally blocks the calling thread while it queries the DNS server, and throws a SocketException if the query fails. I don't know whether it skips the network call when looking up your own host name.