CLOSED: No connection is active or in progressEstablised: The state of the connection has been established;Syn_sent: Send the active line (SYN sign) of the connection packet;SYN_RECV: Received a request to connect the active connection packet;FIN_WAIT1: The socket Service (socket) has been interrupted and the connection is disconnected;Fin_wait2: The connection has been hung up, but is waiting for the other host to respond to the packet disconnection confirmation;Time_wait: The connection has be
First, through the timing of email to detect network connectivity
Copy Code code as follows:
#/bin/bash
echo "Daily Test mail" > State.txt
Mail-s Server_state Abc@jb51.net Rm-df./state.txt
~
Crontab-e
Add the following tasks
* * */root/checknkmail
Time-Sharing and Lunar Week
Second, timed detection network status by e-mail
Checkserve
In large network management, the headache for network administrators is how to know the running status of network devices that are not around in real time. To view the running status of network devices on one machine, it is obviou
(i). ReachabilityAdd source files and frameworkApple's official example, reachability , describes how to obtain and detect the current network status of a device. In your program, you need to copy the project's Reachability.h and REACHABILITY.M to your project, and you need to add systemconfiguration.framework to the project,Such as:Notification of monitoring network
How Android checks the status of the network connection is a common problem in Android development.Obtaining network information requires the appropriate permissions to be added to the Androidmanifest.xml file:1) Determine if there is an Internet connection2) determine if the WiFi network is available3) Determine if th
consideration for multiple networks and collaborative maintenance optimization, only through a single network to improve the performance of multiple networks passively.
Multi-network collaboration ideas and Research
In view of the coordinated development of multiple networks, ZTE has studied multiple network connections, user perception, service delivery, and co
iOS not only built rich network communication APIs to develop network communication applications, but also supported a large number of third-party network communication APIs, fully support TCP, UDP network communication,You can refer to Apple's official documentation for information on using Cfnetwork for UDP protocol
A, DescriptionIn the network application, the network status of the user device needs to be monitored in real time for two purposes:(1) Let users know their network status, to prevent some misunderstandings (such as the application of incompetence)(2) According to the user's
NetWorkReceive in android and get the current network connection status
Now, it is absolutely difficult for an APP to survive without the network, and there will be many frequent network operations, request data, and transmit data. Therefore, we need to have a better understanding of the
phone is really convenient to use, at any time to the Internet (as long as there is a network), no longer need to manually switch. However, this setting will unknowingly deplete our network traffic (local tyrants here).Install traffic monitoring software, a lot of traffic monitoring software settings slightly cumbersome, but also need root, probably not everyone is willing to do so.And I want to design a s
iOS development-Do you really use sdwebimage?2016-05-17 Hosea_zhou interesting. Original Hosea_zhouOriginal address:http://www.jianshu.com/p/dabc0c6d083eApe Bar-Resource Sharing forum:http://www.coderbar.cnRecently, the forum has the latest video materials Oh!Sdwebimage as the most popular image download third-party framework, the use rate is very high. But are you really going to use it? This article will then take an example to analyze how to use sdwebimage rationally.Use the scene: The custom
Use a system approach to monitor network status
The method of system is to realize the monitoring of network state through notification mechanism.
Steps to implement network status monitoring
Define a member variable of type reachability to save the stat
Actual network connection status detection under iOS
PrefaceNetwork connectivity Status detection is a very common requirement for our iOS app development. For a better user experience, we will show local or cached content when there is no network, and prompt the user appropriately. For the vast majority of iOS d
When the network is inaccessible, it is customary to see if there is anything unusual about the current network connection, WinXP users will typically click on the desktop's Network Neighborhood icon to view the properties of the Internet connection, and then view the status of the local connection. But how do you view
In the network application, the network status of the user device needs to be monitored in real time toLet users know their network status, to prevent some misunderstanding (such as strange application is not good)Intelligent processing based on the user's
How to eliminate exclamation points in the native Android network status and android exclamation points
Friends who like to use native Android systems may find that there is often an exclamation mark on their status bar signal icons.
What's going on? This is because Android uses a captive detection method to detect the networ
to the server is unblocked, but due to network jitter or network is weak, and so on, there may be a ping failure, the solution is to add the number of failures limit, over the limit is considered off the network.2/3/4G switch, reachability Although the network changes detected, but the type or cellular movement, can n
())) Subprocess.call (["Ping"Ip"- N"," -"],shell=true,stdout=open (file,"WB"))#determine network status based on temporary file contentsdefNetstatus (FILE,IP):#determine if it is WinXPifPlatform.version (). Split (".") [0] = ="5": With open (file,"R") as F:a=F.readlines ()ifLen (a)! = 1:#IP = A[2].split () [1]count = Int (A[-6].split () [-3]) value= Int (A[-2].split () [ -1][:-2]) log (IP+"the number of pa
[Html] /////// determine the network status when you first open the connection-(int) connectedToNetwork {NSString * kindStr; int kind; // create a zero address, the address 0.0.0.0 indicates querying the network connection status of the local machine. struct sockaddr_in zeroAddress; bzero ( zeroAddress, sizeof (zeroAdd
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.