I've got a question . I really don't het this point. Let's supose that I have a client connected to a server.
I want the server IMEDIATLY know if the client is diconnected . How can I realize this ?
Amd I'm just curios about one thing. I have a server and multiple clients connected to it. Yes , multithreading . Each client connects to 3 ports on the server. So for each client the server will be opening a socket descriptor .Let's take an example : ( the server is using 3 threads with select , for each socket - 3 ports).
Code:
Server will use 3 socket descriptors : 3,4,5 .
Client one will use ( the next ) : 6,7,8.
Client two will use : 9,10,11 .and so on so fort..
Client three will use : 12,13,14 ..
etc..
If , per example client 1 is disconnected ( from all 3 sockets ) , select from server ( all 3 threads ) will connect another client on : 6,7,8 , because they're free..
Good , what do I mean to ask ? How can I know which socket descriptors is using a client ? I mean where do I know client 1 is using : 6 , 7 , 8 ?
I mean a problem like this :
Client 1 is disconnected . But it only disconnect two sockets from the server , so 6,7 socket descriptors are free , but 8 remain full ( because the clients hasent's disconnected ).
So the server ( 3 threads ) with select on each will make the following thing.If another client is connected it will use : 6,7 and the the first free socket descritor in our example if 15.
So client 1 will have : 6,7,15 open socket descriptors at server side.
I want to know clearly on the server side , which socket descriptors numbers are used by each client. I cannot say that they're always be in a numbered way : n,n+1,n-1 . How can I know . Maybe is a stupid question , but ..
Hello, I'm new here and I come from Germany.
At our AIX-ORACLE-System someone has deleted one important file and we'd like to find out who did this, next time.
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Morning,
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hi...
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Hello everyone.
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Hi all
I've been a Debian user since solidly since about 1997 so I'm fairly experienced Linux user as a whole but unfortunately the monoculture has hit be hard recently. I'm working off a Laptop a lot of the time which spends up to 2-4 weeks without an Internet connection. A few weeks ago it... (1 Reply)
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Discussion started by: 1in10
2 Replies
LEARN ABOUT CENTOS
aseqnet
aseqnet(1) General Commands Manual aseqnet(1)NAME
aseqnet - ALSA sequencer connectors over network
SYNOPSIS
aseqnet [remotehost]
DESCRIPTION
aseqnet is an ALSA sequencer client which sends and receives event packets over network. Suppose two hosts connected by network, hostA as
a server and hostB as a client. The ALSA sequencer system must be running on both hosts. For creating the server port, run the following
on hostA:
hostA% aseqnet
sequencer opened: 128:0
Then a user client 128 with port 0 was opened on hostA. (The client number may vary.) For creating the (network-)client port, run aseqnet
with the hostname of the server:
hostB% aseqnet hostA
sequencer opened: 132:0
Now all events sent to hostA:128:0 are transferred to hostB:132:0, and vice versa.
The ports created by aseqnet can be connected arbitrary to other sequencer ports via aconnect(1). For example, to connect hostB:132:0 to a
MIDI output device 65:0:
hostB% aconnect 132:0 65:0
Then events to hostA:128:0 will be delivered to hostB:65:0. The following command plays MIDI on hostB.
hostA% pmidi -p 128:0 foo.mid
The multiple clients may exist simultaneously. If hostC is connected as a client to hostA, events from from hostA are sent to all con-
nected network clients, i.e. hostB and hostC. However, only one connection is allowed from a client to a server.
To disconnect network, stop all clients before server by ctrl-C or sending signal to them. The server will automatically quit.
OPTIONS -p port
Specify the TCP port number or TCP service name.
-s addr
Subscribe to the given address for read automatically.
-d addr
Subscribe to the given address for write automatically.
-v Verbose mode.
SEE ALSO aconnect(1), pmidi(1)AUTHOR
Takashi Iwai <tiwai@suse.de>.
January 1, 2000 aseqnet(1)
12-29-2006
