Hi,
I am new to the unix networking.
I have written one client and server for UDP sockets..
I got the following errors while conpilation
I have include all include files.
Could some one help ...is there any other file to be included.....?
will the include files change on different unix... (3 Replies)
hi,
say I have
dirA/file1
dirB/file2
and I tar them up, and then do
zcat Tar.tar | tar tvf -
Sometimes I will see:
dirA/
dirA/file1
dirB/
dirB/file2
yet other times I will see (4 Replies)
Hi there!
gcc seems not to include available files, see below:
What should I do?
Look forward to your reply/replies!
Thanks
Grahamb
In the source directory I enter:
#gcc -Wall -I/usr/include ./gtkdaq.c > ./out.log 2>&1
Response:
In file included from ./gtkdaq.c:3:... (2 Replies)
Our admin has upgraded our OS solaris system to 5.11 but no more I can compile any trivial or non-trivial code. I'm trying to compile a trivial c++ program(a Helloworld program) but It gives error indicating that include files do not exist (in this trivial case <stdio.h>), it starts compiling but... (1 Reply)
what is the relationship between
/usr/include/sys/*.h
and
/usr/include/unistd.h ?
Fuctions in unistd.h are syscalls. Do the fuctions in sys/*.h call syscalls? (7 Replies)
I am trying to compile a file called PPFormatageMUT.c in which I have included header file which are at some other location but the point is that while compiling the file, it is throwing error saying that
error : no such file or directory
source code location:... (1 Reply)
how can i make find/sed to include directory names with spaces
the command is like this
for i in `find wp-content/themes -type f -print0 | xargs -0 grep -l
-iE 'e'`;do sed -i -e 's/word1/word2/gI' "$i";done
but it skips one directory names with spaces
sed: can't read ./Nova: No such... (5 Replies)
I have an implementation file tomog.cpp that implements a class called Tomog where I need to include its header file which resides in another place.
How can I best specify the include file? I would not like to do
#include "../../tomso/tomography/tomog.hpp"
I wish to do instead
... (3 Replies)
Hi everyone!
This is my first post, so bear with me.
I have this script, vpm, which make use of the libexec directory for commands intended to be run by the bin/vpm binary. I want to add the libexec directory to $PATH when running the vpm binary. I don't want the script itself to try figure... (2 Replies)
This script writes the output files to FILES but I don't want to exclude all directories from ABC_CHQ and LYS_ADV, I want to include one sub directory name process which is under ABC_CHQ and LYS_ADV in the search. Right now its excluding everything from prune directories such as ABC_CHQ, LYS_ADV... (10 Replies)
Discussion started by: John William
10 Replies
LEARN ABOUT DEBIAN
dhcping
dhcping(8) General Commands Manual dhcping(8)NAME
dhcping - send a DHCP request to DHCP server to see if it's up and running
SYNOPSIS
dhcping [-v] [-q] [-i] [-r] -t maxwait -c client-IP-address -s server-IP-address -h client-hardware-address [-g gateway-IP-address]
DESCRIPTION
This command allows the system administrator to check if a remote DHCP server is still functioning.
Options are:
-v Verbose, print some information.
-V Very verbose, print a lot of information.
-i Use DHCPINFORM packets.
-r Use DHCPREQUEST packets (default behaviour).
-q Quiet, print nothing on the screen.
-t maxwait
Maximum time to wait for an answer from the server in seconds. Default is 3 seconds.
-c client-IP-address
Request this IP address. Note that this is also the IP address the answer will be sent to.
-s server-IP-address
Send the DHCP packet to this IP address.
-h client-hardware-address
Use this hardware-address in the DHCP request. It can be up to sixteen octets separated by colons (i.e. 01:02:03:04)
-g gateway-IP-address
Use this IP address for the gateway IP address in the DHCP packet. This option is currently broken.
RETURN VALUES
If everything goes okay, it returns 0. If there went something wrong, it returns 1.
SETUP
This program should be installed setuid root or ran by root only. See SECURITY for more information.
On your DHCP server, add these lines to the dhcpd.conf:
host <your monitoring host FQDN> {
hardware ethernet <your monitor host mac address>;
fixed-address <your monitoring host IP address>;
}
Then try it:
$ dhcping -c your monitoring host IP address
-s your DHCP server IP address
-h your monitor host mac address
It will either respond with "no answer" or "Got answer from: your DHCP server IP address"
The DHCP server logfile will give:
DHCPREQUEST for 192.168.1.1 from 00:20:18:56:29:8f via ed0
DHCPACK on 192.168.1.1 to 00:20:18:56:29:8f via ed0
DHCPRELEASE of 192.168.1.1 from 00:20:18:56:29:8f via ed0 (found)
Running in DHCPINFORM mode with -i:
If you see "DHCPINFORM from 192.168.1.1 via xl0: not authoritative for subnet 192.168.1.0", you should add the authoritative statement to
the subnet, See dhcpd.conf(5) for details.
When running in very verbose mode, dhcping tries to dump all data of the send and received DHCP packets. It will first dump the packet in
hex-format, then decodes the header and finally the options.
HOW IT WORKS
The client either sends a DHCPREQUEST or DHCPINFORM packet to the server and waits for an answer. Then, if a DHCPREQUEST was send, it will
send a DHCPRELEASE back to the server.
SECURITY
This program is installed setuid root as it requires the privileges to bind itself to port 68 (bootpc). Root privileges are dropped as soon
as the program has bound itself to that port.
BUGS
Currently (this may, or may not, change in the future) the ISC DHCP daemon does not write leases with a fixed IP address in the
dhcpd.leases file.
DHCPINFORM packets can only be used on subnets the server is authoritative for. If the monitoring script runs on a subnet the server isn't
authoritative for, it should use the DHCPREQUEST packets. I also experienced some problems with ISC DHCPD v2 servers, but that is also in
the README of it.
The -V option is still working, but shouldn't be used for debugging of the packets. Better use dhcpdump(8) for that, which is available on
my website. I wanted to remove it, but decided only to do it from the documentation, not from the code. Maybe I'll need it one day for
debugging.
AUTHOR
Edwin Groothuis, edwin@mavetju.org (http://www.mavetju.org)
SEE ALSO dhcpd(8), dhclient(8), dhcpd.conf(5), dhcpdump(8)3rd Berkeley Distribution January 27, 2002 dhcping(8)