一、hostapd
-
官方网站：http://w1.fi/hostapd/
- 目前最新版本：hostapd-2.9.tar.gz
1. build
因为前面已经移植好了 openssl 和 libnl，所以编译 hostapd 是很轻松的一件事。
额外打开配置：
- CONFIG_ACS=y
tar zxvf hostapd-2.9.tar.gz
cd hostapd-2.9/hostapd/
cp -p defconfig .config
echo "CC=arm-none-linux-gnueabihf-gcc -L/home/xhr/iTop4412/xhr4412/ssh/openssl/openssl-1.1.1h/out/install/lib -L/home/xhr/iTop4412/xhr4412/wifi/libnl/libnl-3.2.25/__install/lib" >> .config
echo "CFLAGS += -I/home/xhr/iTop4412/xhr4412/wifi/libnl/libnl-3.2.25/__install/include/libnl3" >> .config
echo "LIBS += -L/home/xhr/iTop4412/xhr4412/wifi/libnl/libnl-3.2.25/__install/lib" >> .config
echo "CFLAGS += -I/home/xhr/iTop4412/xhr4412/ssh/openssl/openssl-1.1.1h/out/install/include" >> .config
echo "LIBS += -L/home/xhr/iTop4412/xhr4412/ssh/openssl/openssl-1.1.1h/out/install/lib" >> .config
make
这个报错不用理会：
Package libnl-3.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `libnl-3.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libnl-3.0' found
编译好后生成了
hostapd
和
hostapd_cli
，将他们拷贝到 xhr4412
/usr/bin/
目录。
2. conf
配置文件：
/etc/hostapd.conf
也可以从源码中拷贝。
interface=wlan0
ssid=xhr4412wlan0
channel=0
wpa=2
wpa_passphrase=12345678
max_num_sta=8
3. use
hostapd /etc/hostapd.conf -B
wlan0: ACS-COMPLETED freq=2412 channel=1
Using interface wlan0 with hwaddr 70:f1:1c:27:dd:3a and ssid "xhr4412wlan0"
[ 7902.128687] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
wlan0: interface state ACS->ENABLED
wlan0: AP-ENABLED
wlan0: STA 94:0e:6b:f5:0f:81 IEEE 802.11: authenticated
wlan0: STA 94:0e:6b:f5:0f:81 IEEE 802.11: associated (aid 1)
wlan0: AP-STA-CONNECTED 94:0e:6b:f5:0f:81
wlan0: STA 94:0e:6b:f5:0f:81 RADIUS: starting accounting session 22DB3A5DB12E566F
wlan0: STA 94:0e:6b:f5:0f:81 WPA: pairwise key handshake completed (RSN)
xhr4412 ping 平板：
[root@xhr4412]~# ping 192.168.188.3 -c 8
PING 192.168.188.3 (192.168.188.3): 56 data bytes
64 bytes from 192.168.188.3: seq=0 ttl=64 time=9.943 ms
64 bytes from 192.168.188.3: seq=1 ttl=64 time=2.998 ms
64 bytes from 192.168.188.3: seq=2 ttl=64 time=6.835 ms
64 bytes from 192.168.188.3: seq=3 ttl=64 time=9.052 ms
64 bytes from 192.168.188.3: seq=4 ttl=64 time=4.122 ms
64 bytes from 192.168.188.3: seq=5 ttl=64 time=3.953 ms
64 bytes from 192.168.188.3: seq=6 ttl=64 time=3.417 ms
64 bytes from 192.168.188.3: seq=7 ttl=64 time=3.010 ms
--- 192.168.188.3 ping statistics ---
8 packets transmitted, 8 packets received, 0% packet loss
round-trip min/avg/max = 2.998/5.416/9.943 ms
平板 ping xhr4412：
二、dhcp
-
官网：https://www.isc.org/dhcp/
-
下载：https://www.isc.org/download/#DHCP
- 4.4.2 Current-Stable(January 2020)：dhcp-4.4.2.tar.gz
前面虽然可以通过手机平板等连接 xhr4412 AP，但需要手动设置静态 IP 地址，很麻烦，所以需要 dhcp 自动的获取和设置 IP 。
1. build
tar zxvf dhcp-4.4.2.tar.gz
cd dhcp-4.4.2/
export BUILD_CC=arm-none-linux-gnueabihf-gcc
./configure --host=arm-none-linux-gnueabihf --prefix=$PWD/tmp --with-randomdev=/dev/urandom
vim bind/bind-9.11.14/lib/dns/Makefile.in
make
make install
- bind/bind-9.11.14/lib/dns/Makefile.in:
186 gen: gen.c
187 ${BUILD_CC} ${BUILD_CFLAGS} -I${top_srcdir}/lib/isc/include \
改为：
186 gen: gen.c
187 gcc ${BUILD_CFLAGS} -I${top_srcdir}/lib/isc/include \
报错：
1.
configure: error: need --with-randomdev=PATH or --with-randomdev=no
xhr4412 有 /dev/urandom
2.
configure: WARNING: using cross tools not prefixed with host triplet
configure: error: BUILD_CC not set
export BUILD_CC=arm-none-linux-gnueabihf-gcc
3.
/bin/bash: ./gen: cannot execute binary file: Exec format error
Configuring BIND libraries for DHCP.
configure: WARNING: using cross tools not prefixed with host triplet
修改：bind/bind-9.11.14/lib/dns/Makefile.in
2. conf
make install
后在
tmp
文件夹下，就生成了所需文件。将
tmp/sbin
里的应用程序拷贝到 xhr4412
/usr/sbin
下，将
tmp/etc
里的配置文件拷贝到 xhr4412
/etc/
下，并删除
.example
后缀。
2.1 dhcpd
dhcpd
是 DHCP 服务器，它为其他计算机分配 IP 地址。
(1) vim /etc/dhcpd.conf
subnet 192.168.188.0 netmask 255.255.255.0 {
range 192.168.188.128 192.168.188.254;
option domain-name-servers xhr4412.dhcpd.server;
option domain-name "xhr4412.dhcpd.name";
option routers 192.168.188.1;
option broadcast-address 192.168.188.255;
default-lease-time 600;
max-lease-time 7200;
}
(2) mkdir -p /var/db
(3) touch /var/db/dhcpd.leases
(4) dhcpd
使用 dhcpd 后，通过手机平板直接连接
xhr4412wlan0
AP 即可，可以看到第一个连接的设备 IP 为 192.168.188.128 ，测试两个方向的 ping ，没有问题。
2.2 dhclient
dhclient
是 DHCP 客户端，它可从其他 DHCP 服务器获取 IP 地址，再配置网卡。
(1) connet to AP
wpa_supplicant -Dnl80211 -iwlan0 -c/etc/wpa_supplicant.conf -B
需要干净的网卡，或是将静态 IP 删除：
-
ip addr delete 192.168.188.1 dev wlan0:0
-
ip addr flush dev wlan0
(2) vim dhclient.conf
send host-name = gethostname();
send dhcp-lease-time 3600;
request subnet-mask, broadcast-address, time-offset, routers,
domain-name, domain-name-servers, host-name;
require subnet-mask, domain-name-servers;
timeout 60;
retry 60;
(3) cp client/scripts/linux
-
cp -p /mnt/xhr4412/wifi/dhcp/dhcp-4.4.2/client/scripts/linux /sbin/dhclient-script
- #! /bin/sh
(3) dhclient wlan0 & > /dev/null
可以看到 wlan0 网卡已经设置好 IP 地址，可以 ping 外网了。
参考