ip-address

问题 I know how to look up a hostname from an IPv4 in VB using the GetHostByAddr Windows API call (this works great). However, that function does not allow one to specify the DNS server to use. Sometimes the default company DNS servers are fine, but other times I need to specify an external DNS server for lookups, and I don't think doing a shell nslookup and parsing the output is the best method, here. Note: this is actually going to be used as VBA code in an Excel workbook to help someone else do

问题 I received a string over TCP socket. And this string looks something like this: str = "10.100.200.200\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"; How should I parse this into an IPAddress? If I do this, IPAddress.TryParse(msg.nonTargetIP.Trim(), out ip); it fails to parse. What is simplest way to remove those trailing null's? 回答1: IPAddress.TryParse(msg.nonTargetIp.Replace("\0", String.Empty).Trim(), out ip); Alternatively reading up on Trim() you could do the following which is probably quicker:

问题 I have been trying to figure this out but cannot find a reliable way to get a clients IP address when making a request to a page in asp.net that works with all servers. 回答1: One method is to use Request object: protected void Page_Load(object sender, EventArgs e) { lbl1.Text = Request.UserHostAddress; } 回答2: IpAddress=HttpContext.Current.Request.UserHostAddress; 回答3: Request.ServerVariables["REMOTE_ADDR"] To access an index or property on C#, you should use [ ] instead of ( ) 回答4: Use this

问题 First of all you have to understand a bit about my background. I have never worked with IP cameras before, but I will have to access multiple IP cameras simultaneously with OpenCV very soon. Apart from that, my network knowledge is not that much good. Now the question. I know OpenCV can access IP cameras using its URL with the help of VideoCapture . There are number of questions in StackOverflow as well. But, the IP address is something that can be changed by time to time, it is dynamic. So

问题 First of all you have to understand a bit about my background. I have never worked with IP cameras before, but I will have to access multiple IP cameras simultaneously with OpenCV very soon. Apart from that, my network knowledge is not that much good. Now the question. I know OpenCV can access IP cameras using its URL with the help of VideoCapture . There are number of questions in StackOverflow as well. But, the IP address is something that can be changed by time to time, it is dynamic. So

问题 I am making an iOS and Android App. We require Recharge Functionality in the app. We are planning on using a Recharge API provided by a company. Due to security reasons the API allows request only through specific IP whitelisted IP addresses. This IP address should ideally be the IP of our server. But we are using Firebase as the database and storage and authentication in our app. So how can we make such that the API requests made through the App by our users will go through and not cause an

问题 I have read through the documentation (both API and Manual), and haven't seem to find any support by gwan for the X-Forwarded-For header. The only thing I have found that could be related was REMOTE_BIN_ADDR . I know to get a client IP you can use REMOTE_ADDR however my gwan servers are behind a HA Proxy load balancer, which forwards the client IP via X-Forwarded-For . Does Gwan not support this header? 回答1: As far as we know, while widely used, the X-Forwarded-For HTTP header is not part of

问题 I have a server with a couple of different IP addresses. At this point, each IP can recieve a UDP request, but it is always the same IP that replies, which the requesters do not like. To make a long story short, this is all the essential code: int sock; socklen_t clilen; struct sockaddr_in serv_addr, cli_addr; memset((char*)&serv_addr, 0, sizeof(serv_addr)); sock = socket(AF_INET, SOCK_DGRAM, 0); serv_addr.sin_family = AF_INET; serv_addr.sin_addr.s_addr = htonl(INADDR_ANY); serv_addr.sin_port

问题 I will create a little batch file to copy my IP address directly to my clipboard. I have tried: @echo off ipconfig | find "IPv4" | clip pause But gives me: IPv4 Address. . . . . . . . . . . : 192.168.xx.xx . Is there a way to only get 192.168.xx.xx ? 回答1: for /f "tokens=2 delims=[]" %%a in ('ping -n 1 -4 ""') do echo %%a | clip Execute a ping command to local machine ( "" ), sending only one packet ( -n 1 ) using ipv4 ( -4 ) The output of the ping command is processed inside a for /f command

问题 Using Visual Basic 2008 and Emgu CV, I can capture the stream of a webcam on my PC. What I want to do is connect to an IP camera, knowing its URL, using Capture = New Capture(). Here is the code I have: Imports Emgu.CV Imports Emgu.CV.Util Imports Emgu.CV.Structure Public Class Form1 Dim capturez As Capture = New Capture("rtsp://[IP Address]/mpeg4/media.amp") Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick Dim imagez As Image(Of Bgr,