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  • getnameinfo prototype asks for sockaddr not sockaddr_in ?

    - by Jane
    The getnameinfo prototype asks for sockaddr but I have only seen examples using sockaddr_in. Can this example be re-written for sockaddr ? sin_family becomes sa_family but what about sin_port and sin_addr ? How are they included in sa_data ? struct sockaddr{ unsigned short sa_family; char sa_data[14]; }; struct sockaddr_in{ short sin_family; unsigned short sin_port; struct in_addr sin_addr; char sin_zero[8]; }; struct sockaddr_in sin; memset(&sin, 0, sizeof(sin)); sin.sin_family = AF_INET; sin.sin_addr.s_addr = inet_addr(IPvar); sin.sin_port = 0; // If 0, port is chosen by system getnameinfo( (struct sockaddr *)&sin, sizeof(sin), buffervar, sizeof(buffervar), NULL, 0, 0);

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  • Connecting private IPs

    - by Greg Roberts
    A friend of mine told me there was a way to connect two private IPs without using a proxy server. The idea was that both computers connected to a public server and some how the server joined the private connections and won't use any more bandwidth. Is this true? How's this technique named? Thanks

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  • design a large scale network for an organization

    - by Essam
    hello.i am so new to networking i want to design a large scale network for an organization with HQ and two branches. i want to use class A address for that.my questions are: if i am using the network address 30.0.0.0 for the whole organization how can it be different from another organization company or whatever which is using the same address in another country? now i have the three locations for this organization,so i need 5 subnets [one for the HQ,two for branch A and branch B , one for connecting A to HQ and one for connecting branch B with HQ since i will use central DHCP server at the HQ,is that(number of subnetting) right? is it advisable to use class A or class B for this organization it term of address that will be wasted (lets say it is a university with two branches in two different states)?! that is all your help is highly appropriated.

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  • Odd Series of Packets, How would I reproduce this behavior?

    - by JustSmith
    I recorded a series of http packets that I cant programmatically recreate. The series of packets goes like this: HTTP GET /axis-cgi/admin/param.cgi?action=list&group=Network.eth0.MACAddress,Properties.System.SerialNumber,DVTelTest,SightLogix.ProdShortName HTTP/1.1 HTTP HTTP/1.1 200 OK (text/plain) HTTP GET /axis-cgi/admin/param.cgi?action=list&group=Properties.Image.Resolution HTTP/1.1 HTTP HTTP/1.1 200 OK (text/plain) HTTP GET /axis-cgi/admin/param.cgi?action=update&Network.RTSP.ProtViewer=password HTTP/1.1 HTTP GET /axis-cgi/admin/param.cgi?action=list&group=Event HTTP/1.1 HTTP HTTP/1.1 200 OK (text/plain) HTTP GET /axis-cgi/admin/param.cgi?action=list&group=ImageSource.I0.Sensor HTTP/1.1 HTTP HTTP/1.1 200 OK (text/plain) Notice the two GET followed by one response. I though the two gets were going out at the same time but there is no corresponding number of responses. Also when trying to reproduce this pattern as the server if I abort the first GET request the client waits until it times out and starts the request over with out sending any other requests. What is happening here? How can I reproduce it?

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  • CMake & ExternalProject: Fails to find specific file

    - by Enrico
    Hi, we have some dependency libraries in our repository. The main part is build with cmake. Now the cmake-makefiles shall build the dependency libraries, which do not have a cmake build system. For one specific library there is a "Makefile.squirrel" which should be used. The cmakelists.txt for that library: cmake_minimum_required (VERSION 2.8) include(ExternalProject) ExternalProject_Add(squirrel, SOURCE_DIR "./" UPDATE_COMMAND "" BUILD_IN_SOURCE 1 CONFIGURE_COMMAND "" BUILD_COMMAND "make -f ${CMAKE_CURRENT_SOURCE_DIR}/Makefile.squirrel" INSTALL_COMMAND "" ) However, when running make I get an error message: [ 93%] Performing build step for 'squirrel,' /bin/sh: make -f /home/enrico/projekte/projectname/dependencies/SQUIRREL2/Makefile.squirrel: not found make[2]: *** [dependencies/SQUIRREL2/squirrel,-prefix/src/squirrel,-stamp/squirrel,-build] Error 127 make[1]: *** [dependencies/SQUIRREL2/CMakeFiles/squirrel,.dir/all] Error 2 make: *** [all] Error 2 ls -lA on /home/enrico/projekte/projectname/dependencies/SQUIRREL2/Makefile.squirrel shows that the file exists. Hardcoding the file path (not an option for the solution) does not work, too. any ideas or hints? Thanks, Enrico

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  • Unresolved symbol when inheriting interface

    - by LeopardSkinPillBoxHat
    It's late at night here and I'm going crazy trying to solve a linker error. If I have the following abstract interface: class IArpPacketBuilder { public: IArpPacketBuilder(const DslPortId& aPortId); virtual ~IArpPacketBuilder(); // Other abstract (pure virtual methods) here... }; and I instantiate it like this: class DummyArpPacketBuilder : public IArpPacketBuilder { public: DummyArpPacketBuilder(const DslPortId& aPortId) : IArpPacketBuilder(aPortId) {} ~DummyArpPacketBuilder() {} }; why am I getting the following error when linking? Unresolved symbol references: IArpPacketBuilder::IArpPacketBuilder(DslPortId const&): ppc603_vxworks/_arpPacketQueue.o IArpPacketBuilder::~IArpPacketBuilder(): ppc603_vxworks/_arpPacketQueue.o typeinfo for IArpPacketBuilder: ppc603_vxworks/_arpPacketQueue.o *** Error code 1 IArpPacketBuilder is an abstract interface, so as long as I define the constructors and destructions in the concrete (derived) interface, I should be fine, no? Well it appears not.

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  • Any way using JavaScript API via iOS? and problem with FQL queries responses.

    - by Assaf b
    Hi, I'm developing an iPhone application with FB connect, the JavaScript API includes really powerful methods like wait.on for combining requests... Any way using those API methods via iOS and Xcode? about the FQL responses, I'm using both: request:didReceiveResponse: AND request:didLoad: methods. all the FQL queries I send provoke didReceiveResponse but not all of them provoke the second one (didLoad). @"SELECT uid,eid FROM event_member WHERE uid in (select uid2 from friend where uid1=%d limit 100)", userID when the limit is 1-2 it provokes them all, when it grows too 100 (friends to fetch) it provokes only the first.. does anyone know this problem? Thanks!

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  • php: ip2long returning negative val

    - by andufo
    hi, function ip_address_to_number($IPaddress) { if(!$IPaddress) { return false; } else { $ips = split('\.',$IPaddress); return($ips[3] + $ips[2]*256 + $ips[1]*65536 + $ips[0]*16777216); } } that function executes the same code as the php bundled function ip2long. however, when i print these 2 values, i get 2 different returns. why? (im using php 5.2.10 on a wamp environment). ip2long('200.117.248.17'); //returns -931792879 ip_address_to_number('200.117.248.17'); // returns 3363174417

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  • Project management and bundling dependencies

    - by Joshua
    I've been looking for ways to learn about the right way to manage a software project, and I've stumbled upon the following blog post. I've learned some of the things mentioned the hard way, others make sense, and yet others are still unclear to me. To sum up, the author lists a bunch of features of a project and how much those features contribute to a project's 'suckiness' for a lack of a better term. You can find the full article here: http://spot.livejournal.com/308370.html In particular, I don't understand the author's stance on bundling dependencies with your project. These are: == Bundling == Your source only comes with other code projects that it depends on [ +20 points of FAIL ] Why is this a problem, (especially given the last point)? If your source code cannot be built without first building the bundled code bits [ +10 points of FAIL ] Doesn't this necessarily have to be the case for software built against 3rd party libs? Your code needs that other code to be compiled into its library before the linker can work? If you have modified those other bundled code bits [ +40 points of FAIL ] If this is necessary for your project, then it naturally follows that you've bundled said code with yours. If you want to customize a build of some lib,say WxWidgets, you'll have to edit that projects build scripts to bulid the library that you want. Subsequently, you'll have to publish those changes to people who wish to build your code, so why not use a high level make script with the params already written in, and distribute that? Furthermore, (especially in a windows env) if your code base is dependent on a particular version of a lib (that you also need to custom compile for your project) wouldn't it be easier to give the user the code yourself (because in this case, it is unlikely that the user will already have the correct version installed)? So how would you respond to these comments, and what points may I be failing to take into consideration? Would you agree or disagree with the author's take (or mine), and why?

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  • How to implement RFC 3393 (Ipdv packet delay varation) in C?

    - by sagar
    Hello , I am building an Ethernet Application in which i will be sending packets from one side and receiving it on the other side. I want to calculate delay in packets at the receiver side as in RFC 3393. So I have to put a timestamps in the packet at the sender side and then take the timestamps at the receiver side as soon as i receive the packet . Subtracting the values i will get the difference in timestamps and then subtracting this value with subsequent difference i will get One way ipdv delay . Both the clocks are not synchronized . So any help is greatly appreciated. Thank you.

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  • Making JSON Feed Work Server to Server

    - by Oscar Godson
    I have a JSON feed (which I don't directly control, I have to ask the server admins to update it), that is returning NULL, or otherwise not working when I try to access it from another server. The actual feed works fine, but I can't get it to work like a normal API. Why can I use Flickr, WhitePages, Twitter, etc's JSON APIs, but for: http://portlandoregon.gov/shared/cfm/json.cfm It returns NULL in the browser when using JS. If I call it on the same server, it's fine though. If this is a server issue, what do I ask the admins to change, and if this is a local (browser) based issue, what am I doing wrong for this one feed that works for every other JSON API?

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  • Internet explorer, Safari and Chrome problems with displaying @font-face rules.

    - by Antonio
    Hy guys, I've a problem with IExplorer, Chrome, Safari etc.. Only Firefox works perfectly with all of this @font-face rules: In Css: @font-face { font-family: Calibri; src: url('Calibri.ttf'); } @font-face { font-family: HAND; src: url('http://www.mydomain.org/css/HAND.eot'); src: url("HAND.ttf"); } #side_text { position:relative; width:330px; height:800px; float:left; margin-left:25px; margin-top:30px; } #side_text p { font-family: HAND; font-size: 18pt; text-align:left; color:#f3eee1; } In .html <div id="side_text"> text text text text text text text text I'ven't any problem with Calibri font, maybe because it's installed on os. The HAND font it's the problem. Moreover, IExplorer don't take any customs write in css (color, font-size, align..) That's all, hope to find a solution.. or I'll gone crazy :( Ps: I converted the .ttf font to eot with two different online converter - Sorry for spam :/ (http://ttf2eot.sebastiankippe.com) www.kirsle.net/wizards/ttf2eot.cgi because I've problem to execute ttf2eot on google code Thanks a lot guys!!

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  • How do you get the host address and port from a System.Net.EndPoint?

    - by cyclotis04
    I'm using a TcpClient passed to me from a TcpListener, and for the life of me I can't figure out a simple way to get the address and port it's connected to. The best I have so far is _client.Client.RemoteEndPoint.ToString(); which returns a string in the form FFFF::FFFF:FFFF:FFF:FFFF%00:0000. I've managed to extract the address and port using Regular Expressions, but this seems like overkill. What am I missing?

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  • Screenscraping and reverse engineering health based web tool

    - by ArbInv
    Hi There is a publicly available free tool which has been built to help people understand the impact of various risk factors on their health / life expectancy. I am interested in understanding the data that sits behind the tool. To get this out it would require putting in a range of different socio-demographic factors and analyzing the resulting outputs. This would need to be done across many thousand different individual profiles. The tool was probably built on some standard BI platorm. I have no interest in how the tool was built but do want to get to the data within it. The site has a Terms of Use Agreement which includes: Not copying, distribute, adapt, create derivative works of, translate, or otherwise modify the said tool Not decompile, disassemble, reverse assemble, or otherwise reverse engineer the tool. The said institution retains all rights, title and interest in and to the Tool, and any and all modifications thereof, including all copyright, copyright registrations, trade secrets, trademarks, goodwill and confidential and proprietary information related thereto. Would i be in effect breaking the law if i were to point a screen scraping tool which downloaded the data that sits behind the tool in question?? Any advice welcomed? THANKS

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  • Using C struct without including header file

    - by shams
    My basic problem is that I want to use some structs and functions defined in a header file by not including that header file in my code. The header file is generated by a tool. Since I don't have access to the header file, I can't include it in my program. Here's a simple example of my scenario: first.h #ifndef FIRST_H_GUARD #define FIRST_H_GUARD typedef struct ComplexS { float real; float imag; } Complex; Complex add(Complex a, Complex b); // Other structs and functions #endif first.c #include "first.h" Complex add(Complex a, Complex b) { Complex res; res.real = a.real + b.real; res.imag = a.imag + b.imag; return res; } my_program.c // I cannot/do not want to include the first.h header file here // but I want to use the structs and functions from the first.h #include <stdio.h> int main() { Complex a; a.real = 3; a.imag = 4; Complex b; b.real = 6; b.imag = 2; Complex c = add(a, b); printf("Result (%4.2f, %4.2f)\n", c.real, c.imag); return 0; } My intention is to build an executable for my_program and then use the linker to link up the executables. Is what I want to achieve possible in C?

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  • Codeigniter deny access to directory of controllers with apache config

    - by MAZUMA
    I’d like to restrict access to a folder of controllers that are used for admin purposes only. I’ve tried a number of ways and not coming up with a solution. These controllers are behind password protection. But, I’d like to just remove it from view if someone happens to stumble upon the right directory. Can this be done? I’d rather not do it from htaccess. I have access to the apache config files, so I’d like to handle it there. Does it have anything to do with the way Codeigniter routes? Or, am I just way off? This what I’m using that doesn’t work <Directory /var/www/application/controllers/folder/> Order deny,allow Deny from all Allow from xxx.xxx.xxx.xxx </Directory>

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  • Questions about jQuery's getScript()

    - by Nimbuz
    $.getScript("somescript.js", function() { alert('Load Complete'); }); Once loaded, is it cached or is it loaded again if referenced more than once? If an event depends on this file being loaded, will the event be delayed of fail/timeout in case the file takes longer to load or doesn't load? How do I check and do something in case the file fails to load for some reason? Thanks in advance for your help.

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  • Externally disabling signals for a Linux program.

    - by Harry
    Hello, On Linux, is it possible to somehow disable signaling for programs externally... that is, without modifying their source code? Context: I'm calling a C (and also a Java) program from within a bash script on Linux. I don't want any interruptions for my bash script, and for the other programs that the script launches (as foreground processes). While I can use a... trap '' INT ... in my bash script to disable the Ctrl C signal, this works only when the program control happens to be in the bash code. That is, if I press Ctrl C while the C program is running, the C program gets interrupted and it exits! This C program is doing some critical operation because of which I don't want it be interrupted. I don't have access to the source code of this C program, so signal handling inside the C program is out of question. #!/bin/bash trap 'echo You pressed Ctrl C' INT # A C program to emulate a real-world, long-running program, # which I don't want to be interrupted, and for which I # don't have the source code! # # File: y.c # To build: gcc -o y y.c # # #include <stdio.h> # int main(int argc, char *argv[]) { # printf("Performing a critical operation...\n"); # for(;;); // Do nothing forever. # printf("Performing a critical operation... done.\n"); # } ./y Regards, /HS

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