Send packet from server to a specific client using TCP c# -

-

i writing client-server application. client sends udp broadcast message out trying locate server, server sends udp broadcast message out identifying location.

when client receives message identifying servers location attempts connect server using socket.connect(remoteendpoint).

the server listens these tcp requests on listening socket , accepts requests using listensocket.accept(). clients details stored in array (including ip , port number)

the client sends message server information username , password user entered.

the server checks database username , password , depending on result sends tcp message (this breaks) client sent request check u&p using listening socket. trying use below code send tcp message not work error.

tcpsocket.sendto(message, clientsarray[i].theirsocket.remoteendpoint);

i'm not sure method using.

but in c# there 2 common classes can use server : tcpclient & socket

in tcpclient

... //start server int32 port = 13000; ipaddress localaddr = ipaddress.parse("127.0.0.1"); server = new tcplistener(localaddr, port); server.start();  //accept client tcpclient client = server.accepttcpclient();              networkstream stream = client.getstream(); string data = "message server"; byte[] msg = system.text.encoding.ascii.getbytes(data);  //send client stream.write(msg, 0, msg.length); ...

and in socket using tcp

... //start server socket listensocket = new socket(addressfamily.internetwork, sockettype.stream, protocoltype.tcp); ipaddress hostip = (dns.resolve(ipaddress.any.tostring())).addresslist[0]; ipendpoint ep = new ipendpoint(hostip, port); listensocket.bind(ep);  listensocket.listen(backlog);  //accept client socket handler = listener.accept();  string data = "message server"; byte[] msg = encoding.ascii.getbytes(data);  //send client handler.send(msg); ...

and in socket using udp

you shouldn't use on server since using tcp

... iphostentry hostentry = dns.gethostentry(dns.gethostname()); ipendpoint endpoint = new ipendpoint(hostentry.addresslist[0], 11000);  socket s = new socket(endpoint.address.addressfamily, sockettype.dgram, protocoltype.udp);  string data = "message server"; byte[] msg = encoding.ascii.getbytes(data); //send client udp s.sendto(msg, endpoint); ...

Comments

Post a Comment

Popular posts from this blog

java - Run spring boot application error: Cannot instantiate interface org.springframework.context.ApplicationListener -

-
i have spring project , try make use spring boot , run @ embadded tomcat following : https://spring.io/guides/gs/rest-service/ this application //@configuration //@enableaspectjautoproxy @springbootapplication @componentscan(basepackages = "gux.prome") public class application { public static void main(string[] args) { springapplication.run(application.class, args); } } if use maven command: mvn spring-boot:run , project starts fine, need debug , run main method @ intelij, exception occurs: exception in thread "main" java.lang.illegalargumentexception: cannot instantiate interface org.springframework.context.applicationlistener : org.springframework.boot.logging.classpathloggingapplicationlistener @ org.springframework.boot.springapplication.createspringfactoriesinstances(springapplication.java:414) @ org.springframework.boot.springapplication.getspringfactoriesinstances(springapplication.java:394) @ org.springframework.bo...
Read more

python - pip wont install .WHL files -

-
when try install .whl gohike typing cmd c:\users\owner\downloads>pip install ta_lib-0.4.9-cp27-none-win_amd64.whl i print out: `processing c:\users\owner\downloads\ta_lib-0.4.9-cp27-none-win_amd64.whl complete output command python setup.py egg_info: traceback <most recent call last>: file "<string>", line 1, in <module> ioerror: [errno 2] no such file or directory:'c:\\users\\owner\\appdata\\lo cal\\temp\\pip-9gwk2c-build\\setup.py' ----------------------------------------- command "python setup.py egg_info" failed error code 1 in c:\users\owner\ap pdata\local\temp\pip-9gwk2c-build\` the part between pip- , -build in pip-9gwk2c-build different on same file. i asked python 2.7.11 pip 8.0.3 can't install gohike whl of ta-lib 0.4.9 few days ago , decided ask differently. can me! you have outdated pip not understand wheels. wheels not supposed have setup.py inside. try upgrading pip pip in...
Read more

Excel VBA "Microsoft Windows Common Controls 6.0 (SP6)" Location Changes -

-
i have excel workbook used generate quotations customers. there main page user inputs data, , there buttons generate various pdfs , send them customer. however, 1 user consistently getting error preventing generating , sending pdfs. i beleive "microsoft windows common controls 6.0 (sp6)". it's installed on users' computers. on mine, location "c:\windows\syswow64\mscomctl.ocx" on others "c:\windows\system32\mscomctl.ocx" the user experiencing issues on 32-bit machine, "mscomctl.ocx" file should in system32. have manually put in there, , pointed common controls reference in vba it. issue seems keep reverting looking in syswow64. since folder doesn't exist, can't find it, , can't produce pdfs. i thought perhaps issue user running older version of office (2007) there users on 2013 , 2016. thought perhaps mixture of 64-bit , 32-bit users. user gets sent workbook other users (as quotation process goes further, gets passed ...
Read more