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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Kees (4 Replies)
hi...
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Hello everyone.
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Be Gentle folks, I am a baby OpenSuSe 11.2 user :-)
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Mani (1 Reply)
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)
May someone can answer this. Anytime I ignite my laptop to go online I see via etherape that I am connected to IANA as shown below. Is my provider redirecting me there, the cable under the sea, what is the reason for this?
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Discussion started by: 1in10
2 Replies
LEARN ABOUT DEBIAN
cannastat
CANNASTAT(1) General Commands Manual CANNASTAT(1)NAME
cannastat - Display information about the Kana-Kanji conversion server
SYNOPSIS
cannastat [{-cs|-cannaserver} canna-server ] [-p] [-t] [-a]
DESCRIPTION cannastat(1) displays information about the Kana-Kanji conversion server cannaserver(1M). The information includes the following: the name
of the machine on which the connected server exists, the cannaserver(1M)'s version, the number of clients connecting to the server, the
name of the user connecting to the server, its user number, the socket number, the number of contexts, the time of connection to the
server, the time of use of the server, the idle time, the name of the host under which the client exists, and the frequency of using each
protocol.
If cannastat(1) is called without options, the following is displayed:
Connected to machine1
Canna Server (Ver. 2.1)
Total connecting clients 1
USER_NAME ID NO U_CX C_TIME U_TIME I_TIME HOST_NAME
kon 5 0 4 Tue 21 8:49am 11 12:48 machine2
The items represent the following:
USER_NAME User name
ID Socket number
NO User number
U_CX Context number
C_TIME Time of connection (h:min)
U_TIME User time (h:min:s)
I_TIME Idle time (h:min)
HOST_NAME Name of the host under which the client exists
OPTIONS -cs canna-server (or -cannaserver canna-server)
Specifies the Kana-Kanji conversion server.
-p Displays the frequency of using the protocol.
-t Displays information about the user who started cannastat. It includes the frequency of using the protocol, as well as ID, NO,
U_CX, C_TIME, U_TIME, I_TIME, and HOST_NAME.
-a Displays all information about all users.
FILES
/etc/canna/cannahost Name of the host under which cannaserver is in operation.
SEE ALSO cannaserver(1M), cannakill(1M), cannacheck(1)ENVIRONMENT
CANNAHOST Specifies the name of the host under which cannaserver(1M) is in operation.
CANNASTAT(1)
12-29-2006
