General :: Getting More Than One Udp Packet To Remote End Using Sendmsg

May 11, 2010

I am trying to send data via UDP using sendmsg on the sending side, and recvfrom() on the receiving end.The setup for my data is to have an iovec that has a packet hdr, followed by an iovec that has a payload, then to have subsequent sets of these two types of iovecs. On the receive end, I have a while true loop that does a recvfrom() receiving a size of 1 hdr/payload combination.When I do send out a message that has a total of just 4 iovecs (hdr/payload/hdr/payload) and I use recvfrom on the remote end with a receive size of a hdr/payload set,only the first hdr/payload of the sendmsg is received.I was under the impression that using this while true loop would allow me to receive multiple sets of this hdr/payload combination that is sent out by sendmsg().

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Networking :: Packet Capturing On Remote Machine

May 19, 2010

How can I configure, the packet capturing mechanism to allow non - privileged users to use it...

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Ubuntu Networking :: Send The Keys Or Value As The Packet Data (content Of The Packet) In Ns-2 (for Wireless Environment)

Jul 12, 2010

I am the new user to ns-2. I would like to know is it possible to send the keys or some value as the packet data (content of the packet) in ns-2 (for wireless environment).

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CentOS 5 Server :: Authenticate/Decrypt Packet Error: Packet HMAC Authentication Failed

Sep 17, 2009

I got a problem with my CentOS server. Somebody told me OpenVPN Requires different changes inside my firewall settings. That could be the problem why openvpn wont load..I receive this error on my CentOS panel when im trying to connect into the centos openvpn (with my winxp pc):

Thu Sep 17 20:31:36 2009 TLS Error: incoming packet authentication failed from 84.xx.62.122:2622
Thu Sep 17 20:31:38 2009 Authenticate/Decrypt packet error: packet HMAC authentication failed
Thu Sep 17 20:31:38 2009 TLS Error: incoming packet authentication failed from 84.xx.62.122:2622

[code]....

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Debian :: Ping: Sendmsg: Operation Not Permitted

Feb 16, 2010

I couldn't install everything during setup of my debian server, so I installed post setup through the Add/Remove Programs. My guess is there is so much installed that either DHCP is not setup properly or there is a firewall installed. My computer found an IP address from my router but cannot connect to the DNS service or ping my router. I type: ping 192.168.1.1 computer resp: "ping: sendmsg: Operation not permitted"

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Fedora Networking :: PPPOE Sendmsg - No Buffer Space Available

Jun 8, 2010

I have configured pppoe connection via NetworkManager through key-file plugin. The problem is that after a while i cant load any web page. All connections r up, nothing bad in /var/log/messages. Ping produce mystical error message:
Code:
sendmsg: no buffer space available

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Ubuntu Networking :: D Link ADSL Router - Ping: Sendmsg: Operation Not Permitted

Jan 13, 2010

I use a wired Dlink Adsl Router GLB502T with its inbuilt dialer configured. Problem is it will not connect while computer is running.When I try to ping the local ip of the modem this is what I get "ping: sendmsg: Operation not permitted" and "/etc/init.d/networking restart" has no effect either.I need to restart my computer every time i want to connect to the Internet.I switch on the modem when the grub bootloader appears and the modem connects without any problem.This problem appeared when i installed Ubuntu 9.04.There was no problem with Ubuntu 8.04.

OS:Ubuntu 9.04
Motherboard: Asus M2N68-AM
NVIDIA Geforce 7025/nForce 630a
RTL8211CL Phy Gigabit LAN

[code]....

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Programming :: Use Generic Netlink Receive Function - Error "sendmsg(); If(recvmsg() < 0)"

Jan 2, 2010

i'am tring to use generic netlink and can't find function for blocking not busy waiting receive. I'll try to explain myself. Generic netlink receive mechanism based on callback function - when module receives something,this function invoked. But this is not so good if you need to send something and receive answer. I mean something like that :

sendmsg(); if(recvmsg() < 0) goto err; I need generic netlink recv() function, or some mechanism to implement it. I just want to stay in "recvmsg()" function until i have answer(until call_back function invoked).

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General :: Packet Traveling In Layers?

Sep 28, 2010

I want to know how a network packet travels through different layers, i.e. from the physical layer to the presentation layer in Linux systems.

Are there any detailed articles or books on this topic with code?

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General :: Coding Of Packet Sniffer ?

Feb 24, 2011

I want coding of packet sniffer that runs on red hat and use c++ language.

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General :: Implement Packet Reordering In NS2?

Oct 26, 2010

Does anybody know how to implement packet reordering in NS2? I would be very glad if someone provide me with appropriate tcl script or give a link.

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General :: Packet Sniffer In Fedora 8

Nov 5, 2009

Is there a default built in packet sniffer program in Fedora 8 ?

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General :: Printing Data In An Ip Packet?

Oct 6, 2010

Currently i am working with linux code. I need help in printing data in ip packet. In my program i am defined the headers and defined ip packets. But I am having problems with printing data in the ip. I am thinking that for loop has to be used, but what parameters to use

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General :: WOL - Send Magic Packet?

Apr 1, 2011

As i am posting in this forum you might already have guessed that I am a total linux noob, but I am a pretty faster learner. I know a few basic things but I feel like I am stuck with my problem.I want to send the Magic packet (wake on LAN) from my linux machine to another, but I am unsure how to approach this. I have google�ed my ass off but I am none the wiser. I found a few forums posts and programs that can do the trick and guides in how to use the programs but I have no idea how to install them.You have to know that my linux machine is a NAS server and has therefore only Konsole access (no GUI). As I said before I am pretty much a noob

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General :: Modify Network Packet In Wireshark?

Nov 12, 2010

anyone know network packet editor for Linux? or modify network packet in wireshark?

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General :: Cisco Packet Tracer Fedora 12

Mar 2, 2010

You have accepted the terms to the EULA. Cisco Packet Tracer will now be installed.

Attempting to install package now Preparing...

I need to do a project for my cisco class and i need to get this Packet Tracer to start working!

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General :: Get An Arp Packet From Wireless Wifi Router?

Jun 16, 2011

I am trying to get an arp packet from my wireless wifi router (access point), to which I am not connected. I simply tried ping 192.168.0.1, but the answer was connect: network is unreachable. What can I do about that?

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General :: Kernel Crashed When The Module Tries To Send IPv6 Packet?

Oct 10, 2010

I am facing problem(system gets crash) while I try to send IPv6 packet by using my kernel module. I have given the code and makefile for my module. I will appreciate if any one shares any tester module for sending IPv6 packets.The kernel version that I am using is 2.6.9 and it supports for IPv6.

file name: rtp_pkt_tx.c
#include "linux/kernel.h"
#include "linux/module.h"
#include "linux/skbuff.h"
#include "linux/init.h"

[Code]...

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General :: Making Packet Sniffer Using Raw Socket - Invalid Argument

Nov 16, 2010

I am actually making a packet sniffer using raw socket. Its just that when I use the command '
if((ioctl(rawsock, SIOCGIFINDEX, &ifr)) == -1)
to get the interface index...
Its gives me an error saying :invalid argument?

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General :: Root Privilege Required To Send A Wake-on-lan Magic Packet?

Sep 28, 2010

On Linux, is root privilege required to send a wake-on-lan magic packet? If it depends on how you send the magic packet, please let me know under what situation root is required.

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General :: Unable To Install Software From Terminal Or Synaptic Packet Manager

Feb 9, 2010

i m not able to help any software due to my proxy settings. my proxy block all the download links. not able to install software from terminal or synaptic packet manager

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General :: Tcpdump/ngrep Sniff Packet Network Command Lines?

Jun 21, 2011

I would like to know the command lines for;

-detecting the wifi in my house without being connected to it

-getting ips/macaddress from the people connected to the wifi

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General :: Fatal Error: Raw.c:dlt_raw_encode(): DLT_RAW Plugin Doesn't Support Packet Encoding

Nov 2, 2010

I am trying to change the IP address of the traffic that has been stored. I have tried different commands:

[code]...

however, either from these two commands end up with a following error:

[code]...

when I searched for a solution and generic commands I used those two websites: website1 website2 Commands have been tested using a casual user account as well as a privileged one (root).

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Ubuntu Multimedia :: Option For Canon Remote Capture - Remote Camera Control Software ?

Oct 17, 2010

Canon cameras used to come with a piece of software called remote capture for Windows and MacOS.

You plug in the camera via USB, and then the camera display is on your monitor. From there you can do everything your camera does, like taking pictures of video. Does anyone know if there is linux equivalent software that can do this?

I have found this software, but new cameras aren't supported.
[url]

I'm trying to make a stop motion movie.

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Ubuntu :: Remote Desktop Login To Gdm After Remote Restart

Feb 6, 2011

I maintain plain vanilla Ubuntu 10.04 systems for several friends. Each machine has only one user, the owner. I use Remote Desktop to instruct and to perform maintenance. Here's my problem:After updating the system, if the kernel has changed, a restart is needed. If I do a restart, I then have to phone the owner to insert his login credentials in the gdm login screen, before I can do anything else via Remote Desktop on that machine.There ought to be a simple way I can avoid the phone call and login myself.

I'd strongly prefer not to use any software that is not included in a plain vanilla Ubuntu 10.04 installation. And I don't want to weaken system security beyond what it is now.Is there a solution? Or, what is the simplest solution?

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Red Hat / Fedora :: Log Remote Or External Ip Address Of Remote Clients?

Sep 15, 2010

We're using both SuSe and RHEL servers. Our servers are running behind firewall device and remote root login is disabled in SSH.

We're using NAT.

Remote client connections including failed logins are logged into the /var/log/messages but what is logged are gateway ip of our LAN - the LAN IP of Firewall device.

How can I logged the external or public IP of the remote client?

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Networking :: Packet Spy On A Hub

Jan 25, 2011

I am in a hub(with switches and rooters) and i want to spy what packets everyone receives! if can i do this and if i can which tools i can use?

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Debian :: IP Packet Routing

Jan 27, 2016

I have recently upgraded a computer from Wheezy to Jessie, and I'm having trouble getting an internet connection shared via Ethernet by another computer (the provider) to work on it.I have activated the interface of the Jessie computer and configured a static IP on it in the same subnetwork as the provider's ethernet interface with the following commands:

Code: Select all# ip addr add 192.168.123.201/24 dev eth0
# ip link set up dev eth0

I now would like to set the address of the provider as the default route with Code: Select all# ip route add default via 192.168.123.100 dev eth0, but I get the following error message: Code: Select allRTNETLINK answers: File exists.

Indeed, when I run Code: Select all# ip route, the following comes up:

Code: Select alldefault dev eth0  scope link

I've tried to remove this default route to replace it with mine with Code: Select all# ip route flush table main and Code: Select all# ip route del default but these commands don't seem to work.

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Debian :: Creating A .deb Packet?

Mar 24, 2010

I have to do a .deb packet which will be placed in the repositories of the company.When this packet is installed, it only have to copy a plain text archive i've wrote before, to a path where it's being installed.The other requisite is that it have to watch if there's a program (vim) installed, if it's not installed, then the packet i have created shouldn't install.example:

# ls /home/loopin (as we see, this directory is empty)
# apt-get install mypacket
...

[code]...

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Networking :: DNAT On First SYN ACK Packet

Aug 19, 2010

I am trying to simply address translate TCP packets from one destination IP to another destination IP (DNAT?) without getting the initial SYN packet. Is this possible? I do not think it is with DNAT since the conntrack needs SYN first.

I have given the command:

The problem is that the first packet that matches this rule will be the SYN-ACK and I suspect it is simply DROPPED.

I am sparing you the gory details of why I would do such a silly thing, but simply put; I need to intercept client-to-server packets through a tunnel, but allow server-to-client packets to follow through the regular network.

I have been working on this for many days w/o success and my learning curve is still steep. I can provide more details as needed.

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