I opened a socket with sock_create()... bind() listen() accept().
Then, the far end closes the connection.
I want to close the near end, so I can re-open for the next connection.
But there is no close(), and sock_release() crashes the kernel.
I create SCTP socket with port number 60011. The SCTP socket descriptor value is 18.
When I try to close the socket with the socket descriptor, sometimes it is not closed without errno.
i've written a socket server. when i launch a client, it connects to servers running on various machines on my local network, which then reply to the client with some string messages, and the client exits.
however, when i launch the client repeatedly (say 5 or 6 times in quick succession) the client is unable to bind to its local port. this appears to be because servers are still trying to connect to the client machine's port, even though the client exited and shut the socket down. the actual error i receive is "Error binding socket to 192.168.1.6:44561: Address already in use".
so, is it enough just to shutdown and close a socket? is there some way that in doing so the client machine can send a CONNECTION_REFUSED message to any machine trying to connect to it? i am using PHP, not that that should make much of a difference i hope.
the problem resolves itself after around 20 seconds as the machines trying to connect to the client timeout. i still need to fix this issue though.
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 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 got a engineering sample wifi card - Intel wimax 5350. This card work well with kernel 2.6.28-15-generic and earlier kernels.
However after kernel 2.6.28-16 , this card no longer support by newer kernel.
the error is "Unsupported EEPROM VER=0x21b < 0x21e CALIB=0x4 < 0x4"
I knew the reason is that card is a Engineering sample .. it should not get support in newer version kernels.
What i try to think is that "is it possible to replace old wifi module into the new wifi module in new kernel " and the system can also get works !?
Below is message of dmesg.
------------------ Kernel version : vmlinuz-2.6.28-15-generic
[ 11.683885] iwlagn: Intel(R) Wireless WiFi Link AGN driver for Linux, 1.3.27ks
[ 11.683888] iwlagn: Copyright(c) 2003-2008 Intel Corporation
[Code]....
I want to add some code in existing linux2.6.33.2 to enhance kernelI want to know how to start and where to add code.
View 2 Replies View Relatedsince the release of the 2.6.32.14-127 kernel a couple of days ago I can't use my wireless adapter (rt2870 based) since there isn't a kmod-rt2870 package released for this kernel.Normaly I found that the kmod package was available the same day as the kernel. Does anyone know why there is such a delay this time? Or if there is a workaround
View 3 Replies View Relatedwhat is name of modules in kernel for wireless and lan driver ?
View 1 Replies View RelatedI need to install module u32 into the netfilter module for kernel 2.6.27.
I did not see the source code in the kernel version I have. where can I find the code for U32 module.
I have checked "netfilter.org" and looks like POM is discontinued. Is the u32 module committed to kernel version 2.6.27 or need to patch it. If yes, where can I find the patch?
I building the kernel for a MIPS processor.
I am currently working on a project related to packet sniffing which has been implemented using the concept of raw sockets. I am using C language.I am able to decode the following details from the packets received from a local network,like:
source and Destination Mac Address
source and Destination IP Address
source and Destination port no
But I am having trouble in decoding the domain name when an user in the local network is logging onto internet.For eg. if a user in the local network is trying to log on to web using his browser say if he has logged on to url then from the packet I need to get the following details
source Mac Address from which user had logged on
source IP Address from which user had logged on
domain name
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?
How do I find out which package (rpm) contains the ipg (network driver) module?
View 1 Replies View RelatedI installed openSUSE 11.2 on virtualbox. My host is windows 7. I tried to install the guest additions, but i get an error saying
Code:
Building VirtualBox Guest Additions Kernel Modules...Failed
(Your system does not seem to be set up to build kernel modules)
How should i go about to let my system build kernel modules?
I have a problem with my custom kernel when I want to create the Nvidia kernel module.After this finished I installed the image and headers and created the Nvidia kernel module. Everything worked fine.However, if I remove the linux-source from my home directory then I can't create the kernel module.Even though I have the headers for the kernel installed.
View 2 Replies View RelatedI'm running Virtualbox from the Sun website (need the USB support) and it breaks after each kernel update.The problem is that I installed a lot of Ubuntu systems for transitioning windows users with Windows in virtualbox to ease the migration but I have to rerun vboxdrv setup after each kernel patch.
View 2 Replies View RelatedWhen I try to load the Realtek 8187 modules to kernel using the ./wlan1up command, I get the following error:
[root@localhost rtl8187_linux_26.1025.0328.2007]# ./wlan1up
insmod: error inserting 'ieee80211_crypt-rtl.ko': -1 File exists
[code]...
Can someone tell me how to correct the "Invalid module format"? I hope that correcting the "Invalid module format" error, I will not have the "Unknown symbol in module" error.
Note: I am using wlan1 for this module as I previously am online with the wlan0 network.The same error occurs if I use ./wlan0up.
Where is the perl module for programming with sockets?
View 4 Replies View RelatedWhat is the error "invalid module format" and the message "insert kernel module" mean? And whats the reason for the same?
View 8 Replies View RelatedAug 16 21:41:14 server1 kernel: __ratelimit: 6 callbacks suppressed
Aug 16 21:41:14 server1 kernel: Out of socket memory
Aug 16 21:41:29 server1 last message repeated 21 times
KERNEL: 2.6.26.6
my sysctl.conf:
Code:
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.lo.accept_source_route = 0
net.ipv4.conf.eth0.accept_source_route = 0
net.ipv4.conf.default.accept_source_route = 0
net.ipv4.conf.all.rp_filter = 1
code....
Anyone knows the difference between a socket and TCP connection for connecting to an external system?
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....
when i recompile kernel , every thing is going ok, but when i enter on new kernel , my network does not support me to enter to internet, when i checked them (eth0,eth1) , i found them on, and active ,i need them to create mobile ad hoc network.
View 3 Replies View RelatedWe are seeing recv err on socket 31: 0x36. What could be meaning of the error?.
View 1 Replies View RelatedI recently bought an AMD R7 360 videocard and I'd like to use the free Radeon driver.
Problem is, PCI-ID 0x665f is not present in Jessie's 3.16 kernel sources. The hardware however is supported, it's just not recognized. So I'll have to get the Debain sources and patch include/drm/drm_pciids.h
From the 4.1rc1 kernel I know what to patch and where.
Debian page that explains how to use the Debian build system for recompiling the current kernel from Debian packages?
I have been trying to run my vmachines in virtualbox with no success so I decided to install upgraded packages for upgraded kernel, this means to install them from Virtualization-kernel-HEAD repo.The error is about that known issue where the kernel module can't start.
View 3 Replies View RelatedI have a Samsung phone GT-B3210. For some time I was unable to find working Windows drivers for it. I eventually gave up looking. Then one time I was charging phone over its USB port and booted Ubuntu and was pleasantly surprised when I saw phone's μSD card reader on my desktop. I now need to switch to Gento and would like to be able to work with phone there too. Lsusb tells me it's detected as Bus 007 Device 006: ID 04e8:663f Samsung Electronics Co., Ltd SGH-E720/SGH-E840but lsmod wasn't very helpful. On the list of loaded modules, I wasn't able to find one which looks like it's related to the phone.
View 1 Replies View RelatedI have inserted a module with modprobe. However it seems to have problem.
1- How can I remove the module from modprobe?
2- If I reboot and the kernel can not boot up because of this faulty module, how can I remove it?
The problem I'm facing is that I can't use my headphone. Sound works, but not the headphone. See my ealier thread. It was suggested to edit the module options, but I don't quite know which buttons to push.
View 6 Replies View Related