tailieunhanh - wireless hacking projects for wifi enthusiasts phần 10

để tìm các ví dụ của biểu đồ Smith đại diện cho các góc tuyên truyền khác nhau. Phân cực Tất cả các ăng-ten có một "cực" (viết tắt của phân cực), có thể được ngang, dọc, hoặc Nếu bạn xây dựng một mạng không dây để sử dụng cá nhân, bạn sẽ nhanh chóng biết nếu có những vấn đề quan trọng | Wireless Hacks Appendix A 309 Preparing for the Hack Jj OpenAP is a completely free and open-source software package. However it works only with certain hardware devices. Specifically you need an AP that is based on an Eumitcom WL11000SA-N chipset. The good news is that these can be found in a number of consumer-grade APs including . Robotics USR 2450 Figure SMC EZConnect 2652W Addtron AWS-100 Netcomm NP2000AP Figure The . Robotics USR 2450 These devices can often be found at aftermarket resellers and on eBay and other online sources. Along with the appropriate AP you also need the following items Linearly-mapped external memory card This card needs to be 2MB minimum and operate at OpenAP Web site http recommends a MagicRAM Industrial SRAM Memory Card. Another option for the memory card is the Pretec FA2002. 310 Appendix A Wireless Hacks Null modem cable This is the cable you will need to connect your AP to your computer. Using the console port and a terminal emulation program such as the Windows-based HyperTerm you can communicate directly with your AP. This hack does not require any special tools however be sure to have the following items on hand when performing this hack Screwdriver To remove the screws of the AP box. 9 16 Wrench or Pair of Pliers To remove the antenna connection from the external box. Needle Nose Pliers To remove the metal bracket holding down the PCMCIA card. Performing the Hack The first step in performing the hack is to obtain the source code for OpenAP which can be downloaded from http of this printing the most current version of OpenAP is also need to get the Linux kernel source and untar it into the OpenAP directory. The application source code and kernel source code URLs are provided in the following command-lines. You can follow these commands to compile the Flash image wget http .