Download E-books Open Source For You (September 2014) PDF

Open resource For You
2014-09 (Vol 2 factor 12 )
English | IN | PDF | 108 Pages | 12.05 MB

26 enhance Python Code through the use of a Profiler
30 figuring out the rfile item version (DOM) in Mozilla
35 Experimentingwith extra services in Haskell
40 Introducing AngularJS
45 UseBugzilla toManage Defects in Software
48 AnIntroduction to gadget Drivers within the Linux Kernel
52 CreatingDynamic internet Portals utilizing Joomla and WordPress
56 collect a GPIO keep an eye on software and attempt It at the Raspberry Pi

59 UsePound on RHEL to Balancethe Load on internet
63 WhyWe have to deal with Bounced Emails Servers
67 Boostthe functionality of CloudStack with Varnish
74 UseWireshark to notice ARP Spoofing
77 MakeYour personal PBX with Asterisk

80 Howto Make Your USB Boot with a number of ISOs
86 Contiki OS Connecting Microcontrollers

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0”), ns. community. Ipv4Mask(“255. 255. 255. 0”)) interfaces = handle. Assign(devices) echoServer = ns. purposes. UdpEchoServerHelper(5000) serverApps = echoServer. Install(nodes. Get(1)) serverApps. Start(ns. center. Seconds(2. 0)) serverApps. Stop(ns. center. Seconds(8. 0)) echoClient = ns. purposes. UdpEchoClientHelper(interfaces. GetAddress(1), 5000) echoClient. SetAttribute(“MaxPackets”, ns. center. UintegerValue(1)) echoClient. SetAttribute(“Interval”, ns. center. TimeValue(ns. middle. Seconds(1. 0))) echoClient. SetAttribute(“PacketSize”, ns. center. UintegerValue(512)) clientApps = echoClient. Install(nodes. Get(0)) clientApps. Start(ns. center. Seconds(3. 0)) clientApps. Stop(ns. center. Seconds(8. 0)) ns. middle. Simulator. Run( ) Open authorities ns. middle. Simulator. smash( ) The Python script pythonscript. py simulates a community just like the single we've simulated with the ns-3 script simulation1. cc, which has nodes attached by way of a point-to-point hyperlink, and a UDP echo server and purchaser as purposes. Please check with half three (OSFY, July 2015) of this sequence to refresh your wisdom in regards to the simulation script simulation1. cc. There are varieties of Python bindings in ns-3. those are the monolithic bindings that offer API definitions for the entire modules and will be present in the listing ns/ns-allinone-3. 22/ns-3. 22/bindings/python, and the modular bindings which offer API definitions for person modules and will be present in the respective modules themselves. The ns-3 APIs are incorporated right into a namespace by means of Python bindings. prior, Python bindings used to generate API definitions for ns-3 modules right into a namespace referred to as ‘ns3’. afterward, Python bindings begun producing API definitions for ns-3 modules right into a namespace known as ‘ns’. you could discover that during the script pythonscript. py, the namespace referred to as ‘ns’ is used. the remainder of the Python script is the same to the ns-3 script simulation1. cc. The Python script creates nodes attached via a point-to-point hyperlink. Then the knowledge fee and hold up linked to the hyperlink is determined. IPv4 addresses are assigned to the 2 nodes with the subsequent line of code: deal with. SetBase(ns. community. Ipv4Address(“192. 168. a hundred. 0”), ns. community. Ipv4Mask(“255. 255. 255. 0”)) This convoluted assertion to assign IPv4 addresses to nodes is critical because of one other quandary of Python bindings. many of the conversion constructors within the C++ resource of ns-3 are but to be supported by way of Python bindings. hence, we need to use particular constructors just like the one proven within the prior line of code. After assigning an IP handle on either the nodes, a port quantity is assigned at the node containing the UDP echo server software. The port quantity assigned to the server program is 5000. After this, a UDP echo patron is decided up at the moment node. UDP echo patron parameters just like the greatest variety of packets despatched, the packet dimension, packet sending durations, and so on, are outlined subsequent. The beginning and preventing instances of either the server and shopper purposes also are set. The strains of code ‘ns. middle. Simulator.

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