port

问题 I am a developer of ROS projects. Recently I am trying using ROS(melodic) on WSL2(Windows Subsystem for Linux), and all things works just great. But I got some trouble when I want to use another PC which also in the same local area network(LAN) to communicate with. Before setting the environment variables like "ROS_MASTER_URI, ROS_IP", I know that since WSL 2 work on Hyper-V so the IP show on WSL2 is not the one in the real LAN. I have to do some command like below in order to make everyone

问题 I would like to send a UDP packet in Python and specify the source port but WITHOUT binding. An equivalent with hping3: hping3 -s $sourceport -p $remoteport --udp --file message.bin -d 1024 -c 1 $remoteaddr I have tried to do something like this: s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP) s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) s.bind((SHOST, SPORT)) But of course, Python tries to bind, and it does not work. Now if I don't bind, I can do: s =

问题 I would like to send a UDP packet in Python and specify the source port but WITHOUT binding. An equivalent with hping3: hping3 -s $sourceport -p $remoteport --udp --file message.bin -d 1024 -c 1 $remoteaddr I have tried to do something like this: s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP) s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) s.bind((SHOST, SPORT)) But of course, Python tries to bind, and it does not work. Now if I don't bind, I can do: s =

问题 I am writing a multithreaded server application, in C (linux), that must listen to 2 different port numbers, say listen to port no 3000 and 4000, for different clients connecting to it to serve different functionality (actual function is executed by a worker thread, main thread runs indefinitely and spawns of new workers upon new connections). I am not sure if select would work here as we can have multiple socket connections but all associated with same port number. I tried sequentially

问题 I have to write a SNMP module which monitor a certain server application that I have written too. The problem is that I have to know if this application is running and I should be able to kill it whenever I can. I know the port where the application is listening (reading the application configuration file) and I can try to bind this port to a socket in order to know if it is (or isn't) being used by my application or another which is enough for my module. Here is the code: int get_server

问题 I have to write a SNMP module which monitor a certain server application that I have written too. The problem is that I have to know if this application is running and I should be able to kill it whenever I can. I know the port where the application is listening (reading the application configuration file) and I can try to bind this port to a socket in order to know if it is (or isn't) being used by my application or another which is enough for my module. Here is the code: int get_server

问题 I need to get protocol(HTTP or HTTPS) from a proxy server(IP address and port) with NodeJs. I have a Nodejs server application. while installing the application in any windows machine, it should fetch the proxy configuration from the machine automatically and allows all the requests through the proxy server. I am able to find the proxy server Ip and port from the windows registry(HKEY_USERS.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings) but I don't how to identify the

问题 My URL Rewrite rule only works for port 80 in IIS . The rewrite works for : http://localhost:80 --> http://localhost:8100 The rewrite works for : http://localhost:80/redirect --> http://localhost:8100 The rewrite doesnt work for : http://localhost:8080 --> http://localhost:8100 The rewrite doesnt work for : http://localhost:8080/redirect --> http://localhost:8100 My web.config is following: <?xml version="1.0" encoding="UTF-8"?> <configuration> <system.webServer> <directoryBrowse enabled=

问题 I am currently working on enabling review apps in gitlab. In order to do that I need to deploy an app for every merge request/ branch. Which means I need to find open ports where I can deploy to. Usually this issue would be solved by the answers to this question. But as the Gitlab Runner is itself a docker container with docker.sock mounted, I can not simply execute a script on the host to find empty ports. So I am looking for an elegant solution. I could of course always ssh into the host to

问题 I am creating a Biztalk dynamic port WCF-WebHttp. When I get a response back in the form of a HTTP 404, the port suspends the following error is shown System.Net.WebException: There was no endpoint listening at https://test.xxx.com/xxxx that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details. {"type":"availability.not_found","message":"No availability was found for the properties requested."} I have tried to