multihomed | 易学教程

Getting the IP of the interface that received a recvfrom() UDP packet (Microsoft)

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问题 Using recvfrom() on a socket bound to INADDR_ANY on a Microsoft multihomed PC. when recvfrom() gets an UDP packet: how can I find the Interface (IP) that received the packet? 回答1: There is no way to know the receiving IP when a single listening socket is bound to multiple IPs. Instead of binding a single socket to INADDR_ANY , you can query the machine's list of local IPs using GetAdaptersInfo() and/or GetAdapterAddresses() , then create a separate listening socket for each IP. You can use

SCTP Multihoming

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问题 I've been developing this simple client - server application with C where the client is just sending random data to the server and the server just listens to what the client sends. The protocol I'm using is SCTP and I'm interested on how to implement the multihoming feature to it. I've been searching through the internet about SCTP and multihoming and haven't been able to find any examples about how to instruct SCTP to use multiple addresses for communication. I've only managed to find what

Problem Trying to unicast packets to available networks

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问题 Trying to unicast packets to available networks. There are totally 3 networks. Managed to get packets in only one network.But i am not able to receive the packets in different networks. using this code.. foreach (var i in System.Net.NetworkInformation.NetworkInterface.GetAllNetworkInterfaces()) { foreach (var ua in i.GetIPProperties().UnicastAddresses) { System.Windows.Forms.MessageBox.Show(ua.Address.ToString()); IPAddress Tip = IPAddress.Parse(ua.Address.ToString()); IPEndPoint

Choosing the interface in multi-homed hosts

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问题 When programming through sockets in C, one can automatically get information about their interfaces through the getaddrinfo function by invoking it with the node as NULL and the AI_PASSIVE flag in hints.ai_flags . It returns a list of addrinfo structures that will be suitable for bind() ing and accept() ing connections. On a multi-homed host with a default interface configured, getaddrinfo will return structures pertaining to the default interface which might not be the right one. How can

Choosing the interface in multi-homed hosts

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When programming through sockets in C, one can automatically get information about their interfaces through the getaddrinfo function by invoking it with the node as NULL and the AI_PASSIVE flag in hints.ai_flags . It returns a list of addrinfo structures that will be suitable for bind() ing and accept() ing connections. On a multi-homed host with a default interface configured, getaddrinfo will return structures pertaining to the default interface which might not be the right one. How can getaddrinfo be invoked to return structures from all available interfaces so that the one can be chosen

Binding an IP address just works for the first time

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问题 I want to make a web request from one of available IP addresses on server so I use this class: public class UseIP { public string IP { get; private set; } public UseIP(string IP) { this.IP = IP; } public HttpWebRequest CreateWebRequest(Uri uri) { ServicePoint servicePoint = ServicePointManager.FindServicePoint(uri); servicePoint.BindIPEndPointDelegate = new BindIPEndPoint(Bind); return WebRequest.Create(uri) as HttpWebRequest; } private IPEndPoint Bind(ServicePoint servicePoint, IPEndPoint

Binding an IP address just works for the first time

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I want to make a web request from one of available IP addresses on server so I use this class: public class UseIP { public string IP { get; private set; } public UseIP(string IP) { this.IP = IP; } public HttpWebRequest CreateWebRequest(Uri uri) { ServicePoint servicePoint = ServicePointManager.FindServicePoint(uri); servicePoint.BindIPEndPointDelegate = new BindIPEndPoint(Bind); return WebRequest.Create(uri) as HttpWebRequest; } private IPEndPoint Bind(ServicePoint servicePoint, IPEndPoint remoteEndPoint, int retryCount) { IPAddress address = IPAddress.Parse(this.IP); return new IPEndPoint

SCTP Multihoming

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I've been developing this simple client - server application with C where the client is just sending random data to the server and the server just listens to what the client sends. The protocol I'm using is SCTP and I'm interested on how to implement the multihoming feature to it. I've been searching through the internet about SCTP and multihoming and haven't been able to find any examples about how to instruct SCTP to use multiple addresses for communication. I've only managed to find what commands one should use when trying to setup SCTP with multihoming and it should be quite

Broadcasting UDP message to all the available network cards

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I need to send a UDP message to specific IP and Port. Since there are 3 network cards, 10.1.x.x 10.2.x.x 10.4.x.x when i send a UDP message,i am receiving the message only in one network adapter...the rest of the ip's are not receiving. I want to check for the network adapter while sending the message. How can I do that? Currently I am using the following: IPEndPoint localEndPoint = new IPEndPoint(IPAddress.Parse(LocalIP), 0); IPEndPoint targetEndPoint = new IPEndPoint(TargetIP, iTargetPort); UdpClient sendUdpClient = new UdpClient(localEndPoint); int numBytesSent = sendUdpClient.Send

Broadcasting UDP message to all the available network cards

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问题 I need to send a UDP message to specific IP and Port. Since there are 3 network cards, 10.1.x.x 10.2.x.x 10.4.x.x when i send a UDP message,i am receiving the message only in one network adapter...the rest of the ip's are not receiving. I want to check for the network adapter while sending the message. How can I do that? Currently I am using the following: IPEndPoint localEndPoint = new IPEndPoint(IPAddress.Parse(LocalIP), 0); IPEndPoint targetEndPoint = new IPEndPoint(TargetIP, iTargetPort);