I have a C program and I want to read data from a socket ,and especially I want a client to send a .jpg to the server.The problem I face is that no matter what the size of the photo is,my read command seems to read an amount of data and then does nothing.
The strange thing is that perror doesn't print anything,which means that read is successful,also I checked if I closed the socket in the server code,but I do not.
Your code says to read from the socket until an error is received. No data is not an error, so the read() call just blocks waiting for more data.
Hi
I have apeculiar problem with sockets.
I have a shared object for my client program.
when I send a request to the server, it is suppose to process and sends back the result string to the client.
For the first request, it is working fine i.e. client sends the req. and gets the... (1 Reply)
I have client and server connected.
client write and read from csock.
server write and read from ssock
suppose the server does :
....
close(ssock); //send FIN to client
othertask();
....
READ ERROR
if after the server close() the client does:
...
read(csock,...);
...... (2 Replies)
HI
I have a messaging s/w daemon(TIBCO rvrd) provided by vendor which will accept connections from various clients and routes messages to the destinations. In order to route it internally uses two ports(one tcp adn one udp).
I want to know on which port(tcp/udp) it is transmitting... (3 Replies)
Hi,
I was porting ipv4 application to ipv6; i was done with TCP transports. Now i am facing problem with SCTp transport at runtime.
To test SCTP transport I am using following server and client socket programs. Server program runs fine, but client program fails giving Invalid Arguments for... (0 Replies)
Why does this socket function only read the first 1440 chars of the stream. Why not the whole stream ? I checked it with gdm and valgrind and everything seems correct...
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include... (3 Replies)
I get this error when I log in through console:
"fatal: Read from socket failed: Connection reset by peer".
Can you tell me what this is and why it happens, and how to stop it? Thank you. (1 Reply)
I need clarification on whether it is okay to set socket options on a listening socket
simultaneously when it is being used in an accept() call?
Following is the scenario:-
-- Task 1 - is executing in a loop - polling a listen socket, lets call it 'fd', (whose file descriptor is global)... (2 Replies)
Hello all,
I have a requirement to read and write to a tcp socket from an HP-UX shell script. I see a /dev/tcp character device on my servers:
crw-rw-rw- 1 root root 72 0x00004f Mar 28 18:37 /dev/tcp
So I believe this is what I should use. The problem is that all the... (2 Replies)
Hello,
I have recently updated my AIX machine from version 6.1.7.5 to 6.1.9.1 and i noticed that the errpt of the server is full of ssh messages like the one below:
sshdprocess_id>]: fatal: Read from socket failed: Connection reset by peer
Does anyone knows if this a known bug of the ssh... (15 Replies)
Hi,
When can the read() system call gives timeout error when the same connection worked for writing data to the other end of the socket, while the next call with read() gives timeout error?
Can anyone please explain when this kind of situation appears?
Thanks,
Sanzee (2 Replies)
Discussion started by: sanzee007
2 Replies
LEARN ABOUT HPUX
sockatmark
sockatmark(3N)sockatmark(3N)NAME
sockatmark() - determine whether a socket is at the out-of-band mark
SYNOPSIS DESCRIPTION
The function determines whether the socket specified by the descriptor is at the out-of-band data mark.
If the protocol for the socket supports out-of-band data by marking the stream with an out-of-band mark, the function returns 1 when all
data preceding the mark has been read and the out-of-band mark is the first element in the receive queue. The function does not remove the
mark from the stream.
X/Open Sockets Only
is new in
RETURN VALUES
Upon successful completion, the function returns a value indicating whether the socket is at an out-of-band data mark:
If the protocol has marked the data stream and all data preceding the mark has
been read.
If there is no mark, or if data
precedes the mark in the receive queue.
On failure, returns and sets to indicate the error.
ERRORS
If fails, is set to one of the following values:
The argument is not a valid file descriptor.
The argument does not specify a descriptor for a socket.
APPLICATION USAGE
The use of this function between receive operations allows an application to determine which received data precedes the out-of-band data
and which follows the out-of-band data.
There is an inherent race condition in the use of this function. On an empty receive queue, the current read of the location might be at
the "mark". However, the system has no way of knowing that the next data segment arriving from the network is carrying the mark. Then
returns false, and the next read operation silently consumes the mark.
Hence, this function can only be used reliably in one or both ways:
o when the application already knows that the out-of-band data has been seen by the system
o and that it knows data is waiting to be read at the socket (by using or
AUTHOR
was developed by HP and IEEE.
SEE ALSO ioctl(2), pselect(2), recv(2), recvmsg(2), socket(7).
STANDARDS CONFORMANCE sockatmark(3N)