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hostapd 配置「建议收藏」

hostapd is an IEEE 802.11 AP and IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator. This page is dedicated to the Linux documentation of it’s implementation and use. Please refer to the hostapd home page for information for other Operating Systems. As far a Linux is concerned, out of the old drivers you can only use these 3 drivers with hostapd: HostAP madwifi prism54 All new mac80211 based drivers that implement AP functionality are supported with hostapd’s nl80211 driver. The mac80211 subsystem moves all aspects of master mode into user space. It depends on hostapd to handle authenticating clients, setting encryption keys, establishing key rotation policy, and other aspects of the wireless infrastructure. Due to this, the old method of issuing ‘ iwconfig <wireless interface> mode master’ no longer works. Userspace programs like hostapd now use netlink (the nl80211 driver) to create a master mode interface for your traffic and a monitor mode interface for receiving and transmitting management frames. Getting hostapd Using your distributions hostapd It is advisable to try your distributions version of hostapd before taking the time to compile and install your own copy. This will make future maintenance easier as you’ll be able to use the init scripts shipped by the distro and hostapd will be updated by it as well. If your distribution ships 0.6.8 or later, you can test with this bare minimum config by creating the file hostapd-minimal.conf: #change wlan0 to your wireless device interface=wlan0 driver=nl80211 ssid=test channel=1 If that config errors out with something like: hostapd $ sudo hostapd ./hostapd-minimal.conf Configuration file: ./hostapd-minimal.conf Line 2: invalid/unknown driver ‘nl80211’ 1 errors found in configuration file ‘./hostapd-minimal.conf’ that means that your distro is not shipping hostapd with nl80211 driver support and you’ll need to follow the building instructions that follow. If it works, you can skip down to the configuring hostapd secti

02

[Network]Wireless and Mobile

2.4 CDMA: Code Division Multiple Access The algorithm is as what I have recapped before 调制（modulation） (1)先将资料的0转成 -1 A = [1,-1,1], B = [1,1,-1] 优点是在解调时，更可以差别0和1，而使解调错误率下降。 (2-1) A使用Walsh Transform的第一个channel [1,1,1,1,1,1,1,1]（即其第一个basis,矩阵的第一个row）来做调制 A_m = [1,1,1,1,1,1,1,1,|-1,-1,-1,-1,-1,-1,-1,-1,|1,1,1,1,1,1,1,1,]。 (2-2) B使用Walsh Transform的第二个channel [1,1,1,1,-1,-1,-1,-1]（矩阵的第二个row）来做调制 B_m = [1,1,1,1,-1,-1,-1,-1,|1,1,1,1,-1,-1,-1,-1,|-1,-1,-1,-1,1,1,1,1,]。 (3)将调制的结果相加M = A_m + B_m M = A_m + B_m = [2,2,2,2,0,0,0,0,0,0,0,0,-2,-2,-2,-2,0,0,0,0,2,2,2,2] (4)最后传送出去的信号为M,共同拥有24个bit。 解调（demodulation） (1)将接收到的资料分别和channel做内积 (1-1) M和 第一个channel [1,1,1,1,1,1,1,1]做内积得到 前八码内积：[2,2,2,2,0,0,0,0] \cdot [1,1,1,1,1,1,1,1] = 8 中间八码内积：[0,0,0,0,-2,-2,-2,-2] \cdot [1,1,1,1,1,1,1,1] = -8 后八码内积：[0,0,0,0,2,2,2,2] \cdot [1,1,1,1,1,1,1,1] = 8 (1-2) M和 第二个channel [1,1,1,1,-1,-1,-1,-1]做内积得到 前八码内积：[2,2,2,2,0,0,0,0] \cdot [1,1,1,1,-1,-1,-1,-1] = 8 中间八码内积：[0,0,0,0,-2,-2,-2,-2] \cdot [1,1,1,1,-1,-1,-1,-1] = 8 后八码内积：[0,0,0,0,2,2,2,2] \cdot [1,1,1,1,-1,-1,-1,-1] = -8 (2)内积结果出来若为8，则解调为1;若为 -8，则解调为 -1 (2-1)第一个channel解调出信号为[8, -8, 8] \to [1, -1, 1] (2-2)第二个channel解调出信号为[8, 8, -8] \to [1, 1, -1] (3)最后，将 -1还原回0 (3-1)因此。第一个channel成功还原信号为[1, 0, 1] (3-2)因此。第二个channel成功还原信号为[1, 1, 0]

02

MyLanViewer V4.25.0 Patch

MyLanViewer Network/IP Scanner is a powerful IP address scanner for local area network (LAN), whois and traceroute tool, remote shutdown and Wake On LAN (WOL) manager, wireless network scanner and monitor. This application will help you find all IP addresses, MAC addresses and shared folders of computers on your wired or wireless (Wi-Fi) network. The program scans network and displays your network computers in an easy to read, buddy-list style window that provides the computer name, IP address, MAC address, NIC vendor, OS version, logged users, shared folders and other technical details for each computer. MyLanViewer Network/IP Scanner supports remote shutdown, wake-on-lan, lock workstation, log off, sleep, hibernate, reboot and power off. It is able to monitor IP address and show notifications when the states of some computers change. MyLanViewer Network/IP Scanner can also view and access shared folders, terminate user sessions, disable shared folders, show netstat information and detect rogue DHCP servers. The software can monitor all devices (even hidden) on your subnet, and show notifications when the new devices will be found (for example, to know who is connected to your WiFi router or wireless network). The program easy to install and use, and has a user-friendly and beautiful interface.

01

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