network-interface

来源： https://stackoverflow.com/questions/41378338/mininet-configure-multiple-interfaces-on-a-host

问题 I currently have multiple network alias (eth0, eht0:1, eth0:2), each having their own private ip which has its own public ip. When using remote web driver with phantomjs (ghostdriver), it always chooses the local host (See BUG https://github.com/ariya/phantomjs/issues/10269), for client argument --webdriver=ip:port, thus I cannot rely on phantomjs to pick the correct interface. I am currently under the impression that I will have to use IPTABLES. I want to route ever instance of my java

问题 If the kernel decides to change the interface index for some reason, our userspace code cached interface index does not gets updated and it starts dropping the packet because their is mismatch between interface index cached in userspace and what is actually present in kernel. I've used if_indextoname(index, interfaceName) to solve this problem. Basically kernel knows which index maps to correct interface name. Now comes my requirement: I need to test my code. Is there a way by which I can

问题 I'm writing a UPnP AV/DLNA DMS which needs to send and receive SSDP messages. In response to some M-SEARCH packets I need to send a reply with the URL of a resource (in this case a HTTP server), which I've chosen to bind to INADDR_ANY ( 0.0.0.0 ). Of course this address is meaningless to the sender of the M-SEARCH packet: The address of the interface on which the M-SEARCH was received is most appropriate. How can I determine the appropriate address to send in the reply packet? Some ideas I've

问题 I want to get accurate download/upload speed through a Network Interface using C# .NET I know that it can be calculated using GetIPv4Statistics().BytesReceived and putting the Thread to sleep for sometime. But it's not giving the output what I am getting in my browser. 回答1: By looking at another answer to a question you posted in NetworkInterface.GetIPv4Statistics().BytesReceived - What does it return? I believe the issue might be that you are using to small intervals. I believe the counter

问题 I want to get accurate download/upload speed through a Network Interface using C# .NET I know that it can be calculated using GetIPv4Statistics().BytesReceived and putting the Thread to sleep for sometime. But it's not giving the output what I am getting in my browser. 回答1: By looking at another answer to a question you posted in NetworkInterface.GetIPv4Statistics().BytesReceived - What does it return? I believe the issue might be that you are using to small intervals. I believe the counter

问题 How can I programmingly (C) know if given interface has static address or one provided by dhcp ? I can look at /var/db/dhclient.leases.<interface_name> . Any better/cleaner way? any ioctl I can use? 回答1: Read /etc/rc.conf . Look for lines starting with ifconfig and see which of those contain the text DHCP . This will not catch interfaces that were re-configured by running dhclient manually. Parsing the leases file would work better in that respect, assuming its permessions allow your program

问题 In either http.request or net.connect , is there an option that I can specify a network interface to initiate a connection? EDIT: AFAIK in OS level I can specify address level, or load balancing into routing tables. But the way of interface choosing in my software is more than that, I wanna know if I can do that in codes. 回答1: Node has this built in: http://nodejs.org/api/net.html#net_net_connect_options_connectionlistener http://nodejs.org/api/http.html#http_http_request_options_callback See

问题 I am developing an app in which the first thing i need is how to get devices that are connected to my wifi network or same wifi network .ie ip adress,device name etc. I don't have any idea how to do that have searched alot but there are no examples available. I have done one thing that i will ping 255 ips and whichever will respond will be the connected ips but the problem here is that there are virtual ips already assigned to some websites so i need to detect only the real device ip

问题 I am using spark and hadoop on docker container: I have 3 container master and 2 slave. Everything is working properly but I have problem with spark proxy webapp when running a task. I can connect to yarn webapp though n http://172.20.0.2:8088/ I can also acces the nodes with http://172.20.0.3:8042/node and http://172.20.0.3:8043/node But when tring to access spark monitoring with this address http://172.20.0.2:8088/proxy/application_1521727348200_0001/ I get HTTP ERROR 500 Problem accessing