I want to configure socket timer to release socket(port) once the connection is terminated. Do we have something in Linux OS to configure this delay to release socket?.
Any command, link or man-page anything will be helpful.
I browsed a lot but unable to find it.
I am pragmatically trying to upload a list of files from my client machine to a proFTPd server I have running on Ubuntu. Every time I get several (around fifty) files into the transfer, I get the following error: Quote: Connection reset by peer: socket write error
I am able to remotely upload 25,000 small files of ~ 1K in size, but when I go to upload hundreds of 2-4 Mb files, I get a socket write error. Am I using up all available sockets before they can be released? If so, how do I release the sockets? If not, what does this error mean and why am I getting it?
Anyone knows the difference between a socket and TCP connection for connecting to an external system?
View 1 Replies View RelatedI have a server listening on incoming client connections. Once the client establishes SSL connection with the server, the server waits on read() from the client. Only Client can disconnect the connection. I want to have a timer in the server program to wait for x secs after read() and then disconnect the Client connection.
View 3 Replies View RelatedI had installed Fedora 10
Below is the output of uname -a
Linux 2.6.27.5-117.fc10.i686.PAE #1 SMP Tue Nov 18 12:08:10 EST 2008 i686 i686 i386 GNU/Linux
I need to enable telnet service on it, then found xinetd and telnet-server not installed,
Then I had installed below
First I had installed Xinetd: xinetd-2.3.14-21.fc10.i386.rpm
then I had installed telnet-server: xinetd-2.3.14-21.fc10.i386.rpm
After installation I executed below commands
Service xinetd start
Chkconfig xinetd on
Chkconfig telnet on
Service iptables stop
Chkconfig iptables off
Iptables �F
After I had tried telnet localhost ----IT FAILED
when I run telnet server manually by issuing the below command
/usr/sbin/in.telnetd, I get below error
[COLOR="Red"]/usr/sbin/in.telnetd: getpeername: Socket operation on non-socket[/COLOR]
I have other system running same OS, I had followed the same steps discussed above to enable telnet, It works fine on it.
I am trying to connect with Winsock Windows sockets from a PC running Windows XP with a utility program that enables a dialogue over sockets. I have the listener running on Ubuntu on Port 6330. I can telnet to the listener and interact from both the Ubuntu desktop and the XP PC. But my utility program using Winsock is unable to connect. I have no firewalls impeding this. Maybe there is a better vehicle than the Windows Winsock.dll? I dont need network file access, just TCP ports/.sockets.
View 1 Replies View Relatedi'm writing a simple program of client socket program. Here below is the code sample which i'm writing...
Code:
//tcp_client.c
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include<string.h>
#include<stdlib.h>
[Code].....
the above code works fine.if we copmile and run ./a.exe 192.xx.xx.xxx 1111 and press enter it works fine..everytime it asks "Please enter the message: " and if give that will be displayed in server. but my problem is i dont want to print everytime "Please enter the message: " i just want to feed some words one by one to the socket.
im getting that error in my code for some reason. I compiled my code, and when i try to run this server it throws me an error on my call to setsocketopt(). The only way it can reach that part of my loop is if it succeeds when it calls sock() so I dont understand why the error says its an operation on a non-socket. Im just trying to set up a server to pass messages from a client to it a viceversa. Here is the code:
Code:
int main()
{
int socket_fd, new_socket_fd, k;
struct addrinfo hints, *server_info, *p;
struct sockaddr_storage peer_address;
code....
We are seeing recv err on socket 31: 0x36. What could be meaning of the error?.
View 1 Replies View RelatedI'm running Ubuntu 10.10. I have a problem with any client side network communication from any java based program/application. I've tried to run the following code:
Code:
public static void main(String[] args) throws Exception {
long start = System.currentTimeMillis();
Socket s = new Socket("ubuntuforums.org", 80);
System.out.println("1. connection created in "+ (System.currentTimeMillis() - start)/1000.0 +" s");
s.close(); start = System.currentTimeMillis();
s = new Socket("ubuntuforums.org", 80);
System.out.println("2. connection created in "+ (System.currentTimeMillis() - start)/1000.0 +" s");
s.close(); }
The result is the following:
Code:
1. connection created in 189.31 s
2. connection created in 0.085 s
I've tried both java-1.6.0-openjdk and java-6-sun-1.6.0.24 with almost the same results. During the extremely long 189 seconds, the processor is doing almost nothing (java thread has 0 %). I've tried also a wireshark to check what is going on, but the first packet was released after those 189 seconds. There is nothing in log files, I have no exceptions or errors, and the connections work (after the first long delay) just fine.
Is there any command in Linux to kill a socket connection WITHOUT killing its parent application? For example, I have streaming server with several connected users and I want to close socket connection to one of them?
View 1 Replies View Relatedi have a server program which accept multiple client connection and am using polling. like every 2 secs it will look to client whether any data is received after it binded. i have used setitimer but there is runtime error i got.. the server accept all client connection but doesn't execute any msg which client sent.
#include<stdio.h>
#include<stdlib.h>
#include<sys/socket.h>
#include<sys/types.h>
#include<netdb.h>
#include<unistd.h>
#include<pthread.h>
#include<string.h>
[Code]....
iam just trying to connect to server which accepts one client and server will read(blocking operation) infinitely, but After closing the client socket the server "read operation" is returning zero and "errno variable(in errno.h)" value is also zero. how can i detect whether a client socket is closed/active..?
client.c
Serv_Addr.sin_family = AF_INET;
Serv_Addr.sin_addr.s_addr = inet_addr("127.0.0.1");
Serv_Addr.sin_port = htons(26553);
if( 0 > connect (Serv_Fds,&Serv_Addr,sizeof(Serv_Addr)) )
{
perror("connect");
return 0;
[Code]....
In looking at the release notes, I saw the comment File locations changes:
* MySQL socket file and pid file were moved from /var/lib/mysql to more reasonable location /var/run/mysql by default.
* MySQL log files are in /var/log/mysql. Not sure what I was supposed to do with that information. So I ignored it. Now, I am finding some issues with it. The web server works, but any connection to the database fails with 2002: Can't connect to local MySQL server through socket '/var/run/mysql/mysql.sock' (2)The thought dawned on me that maybe all my databases were erased and none set up. Going in to the terminal, I could connect and list and query the databases. So even though I backed them up, they still are there!
phpMyAdmin gives the same error message.
However, when I go into MySQL Administrator, it works fine.
I forgot where I saw it, but the socket is still set to var/lib/mysql. I could not find any mysql install log and would say what was in my cnf.my, but it still doesn't exist just as it has not in the past. Not sure if I should allow the MySQL Administrator to create it since I always ignored the prompt in the past and it worked. (Just wishing to keep the defaults)
At first I thought the upgrade upgraded the MySQL, but it's still 5.1.39 as I believe before. I've un-installed mysql-server and re-installed it with no change.
Can anyone can tell me how to get the socket to /var/run/mysql or what else is wrong? I read one place where mysql is supposed to set it up.
I'm trying to run Interhack (spoiled variant of Nethack) for local game. Is looking through settings I saw that:
[Code]....
When I try to start it with ih_server option it gives me that error: Code: Can't access() script Could not create socket: Connection refused I think my problem is closed port: Code: nc localhost 9999 localhost [127.0.0.1] 9999 (?) : Connection refused How do I fix this?
I have the following problem. I want to find out connection between process and socket. When I type to the terminal the following command netstat -anpetu so I get the following output:
[Code]....
As you can see just some connection have assign PID/Programme. How can I find out Program of this socket without PID/programme. like this 0.0.0.0:52472? Certainly I know that some port are well-known but there are a lot of unknown ports(like 8307 3350 and so on).
I'm writing a client-server program. There are more than 500 clients. I start a thread to process and response to each client and the processing needs some MySQL query. I'm looking for any possible hazards on my server!
1- Any limitation on "Maximum Simultaneous Socket Connection"?
2- Any limitation on using mysql?
3- As socket on Linux are file, Any limitation on number of sockets or threads?
I'm using a Linux server (Centos or Fedora or Ubuntu) and clients are both Linux and Windows.
figure out this error?
Code:
kradalby@hpcompaq6530b-laptop ~/.ssh $ ssh -vvv -p 110 kradalby@dfekt.no
OpenSSH_5.5p1 Debian-5+b1, OpenSSL 0.9.8o 01 Jun 2010
[code]....
My friend bought an old hard drive. He noticed something with the hard drive that it was just replaced with a SATA socket. So meaning, the SATA socket was soldered to the PATA hard disk to replace the PATA socket to SATA socket to make it a SATA.
Now the question is:
1. Does the Transfer Rate of the harddisk (that has been replaced from PATA socket to SATA socket) would be SATA transfer rate? OR would still be PATA transfer rate?
Can we open TCP and UDP socket on same port number?
View 1 Replies View RelatedI am facing some problem with loopback on UDP sockets. is there anyway by with we could avoid loopbacking of a UDP datagram destined to same IP address, and instead force it to go all the way till NIC and then come back to the socket.
The problem is, we have some piece of code written at driver level, and we want each and every packet to hit that code on its TX and RX path. But if src and dest IPs are same, packet loops back from the IP stack itself, without hitting the driver code.
Can we modify the characteristics of a UDP socket, such that each and every packet has to go through NIC interface, thus avoiding loop backing when the src and dest IPs are same?
I am trying to create the IPV6 socket and was wondering if anybody has any code strip which I can reuse ?
View 1 Replies View RelatedI want to reuse a socket without closing the same. I am running a client and it connects to a server. The server shuts down in between and comes up. So after this I want to reconnect to server without closing my socket and creating another one. Is there any way?
View 3 Replies View Relatedhow can i send an array of string to the client from the server side?
View 2 Replies View RelatedMy question is quite simple:What are type of applications where socket in blocking mode can be used ?
And where non-blocking mode to be used ??
TCP is blocking by default.
Have a question regarding the implementation of TCP keep alives.
If I enable the option of keep-alives on a TCP socket, is there any way that my application can get the response to the keep-alive back from the kernel. Basically, I have a 'select' blocking on a socket on which I have enabled keep-alives. I need to know if select would unblock if a response to a keep-alive sent by the kernel is received on the socket.
#server.pl
use IO::Socket;
$| = 1;
$socket = new IO::Socket::INET (
LocalHost => '10.100.207.13',
LocalPort => '5000',
code....
it displays the message "couldn't connect to the server". How can i connect to the remote machine using tcp socket?
I am currently trying to get a B.A.T.M.A.N mesh network up and running. the thing uses UDP port 4305 for broadcasting to nearby nodes and it seems this port is closed or used by something else.
now i have tried to open this port with commands like
Code:
iptables -A INPUT -p udp --dport 4305 -j ACCEPT
iptables -A OUTPUT -p udp --dport 4305 -j ACCEPT
it still gives me the same error saying the socket cannot connect.any way for me to scan that udp port, see what is blocking it and open the thing up ?
I'm using mysql server through tcp/ip with no problem. But I don't know since when I'm not able to connect through socket. There are lots of topics but my bad I couldn't find one works for me.
OS: Ubuntu 9.04
mysql 5.0.75-0ubuntu10.5
my.cnf
Quote:
[mysqld]
user = mysql
socket = /var/run/mysqld/mysqld.sock
skip-name-resolve
safe-show-database
code....
/var/run/mysqld/mysqld.sock socket exists and has chmod 777
Error:
Code:
ERROR 2002 (HY000): Can't connect to local MySQL server through socket 'localhost' (2)
If I open a raw SCTP socket, am I able to bind to a specific port? (I only want to see SCTP packets from a particular IP address AND port.) Or, any raw SCTP socket, regardless of port binding , will get all SCTP packets received by the OS from that IP address? The port doesn't matter and is ignored.
View 1 Replies View Related