ethernet

can I use python's 'socket' module to connect to a wireless ethernet host?

由 非 Y 不嫁゛ 提交于 2019-12-10 12:14:31
问题 My goal is to have remote control of a device on a WLAN. This device has software that enables me to configure this wireless network (IP, mask, gateway, dns). I can successfully connect this device, and my computer to a common network. Since both machines share the same network, I made the assumption that I would be able to open up a socket between them. Knowing the IP and port of the device that I am attempting to control remotely I used the following code, only to receive a timeout: import

Is there a way to access android.net.EthernetManager in an Android app?

由 巧了我就是萌 提交于 2019-12-10 11:16:07
问题 Is there a way to access android.net.EthernetManager in an Android app? Both Class.forName("android.net.ethernet.EthernetManager") and Class.forName("android.net.EthernetManager") generate a ClassNotFoundException. 回答1: Seems that android.net.EthernetManager is a hidden class, marked as @hide by Javadoc. You can access it by using customized SDK platform which was made here, and you don't need to root the device. Android Hidden API library is a modified jar file which combines android.jar

QNetworkConfigurationManager::configurationChanged signal not getting called for ETHERNET config changes

由 偶尔善良 提交于 2019-12-10 10:42:28
问题 QNetworkConfigurationManager::configurationChanged() signal is not getting called by the system when I am inserting a LAN cable with a valid IP(Ethernet interface). It is getting called for WLAN and USB interface but not for ETHERNET config changes Hope to get some pointers on this. 来源： https://stackoverflow.com/questions/14359657/qnetworkconfigurationmanagerconfigurationchanged-signal-not-getting-called-for

Why In Manchester encoding, the bit rate is half of the baud rate?

由 China☆狼群 提交于 2019-12-10 09:28:08
问题 I think baud rate is the rate of the symbols, and if each symbol contains n bit, then the bit rate should be n x baud rate In Ethernet( Manchester encoding) ,if bit rate is half of the baud rate, then a symbol contains 1/2 bit ? As far as I know, bit rate should at least not less than symbol rate (baud rate). About the relationship of baud rate and bit rate, my understanding have no problems, yet when it comes to the Manchester code, it's totally counterintuitive, could anyone explain about

Android ethernet configure IP using dhcp [closed]

由 北慕城南 提交于 2019-12-09 18:48:33
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . I have an android box with ethernet interface. There are no Java classes in android SDK to configure ethernet. As a last resort I am using shell commands to configure ethernet. Could any body please guide me which shell command do I use to configure ethernet? Sample commands will be highly appreciated. 回答1:

Having a problem figuring out how to get Ethernet interface info on Mac OS X using ioctl/SIOCGIFADDR/SIOCGIFCONF?

由 爷，独闯天下 提交于 2019-12-09 12:55:48
问题 Are you having a problem figuring out how to get interface info on Mac OS X using ioctl/SIOCGIFADDR/SIOCGIFCONF? I had a lot of trouble getting code that worked fine on Linux to work on Mac OS X today. 回答1: Copy-paste to main.c and gcc main.c && ./a.out should work (lists all network interfaces, their ipv4/6 address, netmask and MAC address if associated): Works fine on Mac OSX and iOS iPad/iPhone : #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/types.h> #include

Programmatic use of ARP

由 那年仲夏 提交于 2019-12-08 21:19:25
I have a need for some C or C++ code, compilable under Linux, to be able to take a list of IP addresses of some arbitrary number of remote hosts machines and obtain a ethernet MAC address for each one. These host machines may be on the same subnet or they could be on a different subnet behind a router. Its OK if the MAC address of some or all of the remote hosts is the address of the interface on the router. Ultimately, I want to hand off the IP address and MAC address to an FPGA who will use these pieces of information to format and send UDP/IP packets over ethernet to the hosts. Obviously,

mmap very slow when using O_SYNC

由 ε祈祈猫儿з 提交于 2019-12-08 11:39:11
问题 Brief description of our project: We are using CycloneV in our project, FPGA will write data to DDR using AXI bus and our application needs to send the data out using Ethernet. We benchmark our Ethernet throughput using iperf and it can achieve a speed of about 700Mbps. When we test our application throughput, the result we are getting is just 400Mbps. We write a simple server code without using /dev/mem , then populate the memory with random data using dd command and the application reads

How to read weight from scale using ethernet connection [closed]

由 安稳与你 提交于 2019-12-08 08:59:32
问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 4 years ago . I have a Mettler Toledo XS32000L scale and I am simply trying to read the weight via an Ethernet connection and a VB.net (2010) application. I have found plenty of information/code for a serial(COM) connection but nothing for an Ethernet connection. Communication mode: Client &

Can ndo_start_xmit() be called from atomic contexts?

由 放肆的年华 提交于 2019-12-08 07:56:16
问题 Is ndo_start_xmit() called (or could it be called) from atomic contexts? Please provide documentation references. More specifically, is ndo_start_xmit() forbidden from directly doing any of the following: reading and writing a TCP socket? locking a mutex or semaphore? sleeping? calling kmalloc() without GFP_ATOMIC ? I did some simple tests, and at least the first 3 cases fail at least occasionally. Calls to ndo_start_xmit() driven by network operations involving less queueing seem to fail
订阅 ethernet