SSU_DNS及DHCP
配置说明

1. 概述¶

P5 SDK默认设置支持ssw102b sdio wifi，因此系统在启动的demo.sh中自动加载sigma_wifi_init.sh来设置wifi网络。

2. 配置以太网静态IP¶

ifconfig eth0 up;
ifconfig eth0 hw ether 00:38:1B:8A:82:DB;
ifconfig eth0 192.168.137.88 netmask 255.255.255.0 broadcast 192.168.137.1;
route add default 192.168.137.1

3. 配置以太网动态IP¶

ifconfig eth0 up;
udhcpc -i eth0 -s /etc/init.d/udhcpc.script

4. 开启DNS¶

DNC依赖dnc库文件 ssw102b对应的libdns放置在customer\lib\libdns目录下，如有缺失，可以在project\release\chip\p5\dispcam\common\glibc\6.4.0\wifi\lib\libdns下复制到对应位置，然后到处路径。测试时可以将lib放在挂载目录下，如：export LD_LIBARY_PATH=$LD_LIBRARY_PATH:/customer/wifi

5. 添加DNS域名服务器¶

在project\image\etc\init.d\udhcpc.script中找到：

for i in &dns ；do
    echo "Adding DNS server $i"
    echo "nameserver $i" >> "$tmpfile"
done

修改或者在后面加入：

echo "name server 202.96.134.133" >> "$tmpfile"

6. 测试网络¶

6.1. 首先确保板端网络可以访问外部网络¶

ping -I eth0 www.baidu.com
PING www.baidu.com (14.215.177.38):56 data bytes //出现这中情况说明dns已经解析到ip，但网络限制无法访问外部网络。

6.2. 采用无线网络¶

运行：

cd customer/wifi;
./sigma_wifi_init.sh

或者:

/customer/wifi # udhcpc -i wlan0 -s /etc/init.d/uphcpc.script
udhcpc (v1.20.2) started
Setting IP address 0.0.0.0 on wlan0
[Sstar_log]:br0_netdev_open()-1199: dev_get_by_name(br0)
Successfully initialized wpa_supplicant
Sending discover...
wlan0: SME: Trying to authenticate with fa:ac:65:f7:bf:89 (SSID='sstest' freq=2437 MHz)
[Sstar_log]:wlan0:free authen bss ++
[Sstar_log]:authen:(fa:ac:65:f7:bf:89),ssid(sstest)
[Sstar_log]:wlan0: authenticated
wlan0: Trying to associate with fa:ac:65:f7:bf:89 (SSID='sstest' freq=2437 MHz)
[Sstar_log]:wlan0:free authen bss ++
[Sstar_log]:wlan0:free authen bss --
[Sstar_log]:wlan0: associated
[Sstar_log]:[fa:ac:65:f7:bf:89]:20M channel
[Sstar_log]:ieee80211_recalc_ps:work busy
wlan0: Associated with fa:ac:65:f7:bf:89
wlan0: CTRL-EVENT-SUBNET-STATUS-UPDATE status=0
wlan0: WPA: Key negotiation completed with fa:ac:65:f7:bf:89 [PTK=CCMP GTK=CCMP]
wlan0: CTRL-EVENT-CONNECTED - Connection to fa:ac:65:f7:bf:89 completed [id=0 id_str=]
[Sstar_log]:ieee80211_recalc_ps:work busy
[Sstar_log]:ieee80211_wk_connecting: time out
[Sstar_log]:wsm_set_pm:pmMode:129,fastPsmIdlePeriod:255,apPsmChangePeriod:0,minAutoPsPollPeriod:0
Sending discover...
Sending select for 192.168.137.88...
Lease of 192.168.137.88 obtained, lease time 604800
Setting IP address 192.168.137.88 on wlan0
[Sstar_log]:Sstar_bss_info_changed 749 ,pmMode = 0
[Sstar_log]:wsm_set_pm:pmMode:0,fastPsmIdlePeriod:255,apPsmChangePeriod:0,minAutoPsPollPeriod:0
[Sstar_log]:Sstar_bss_info_changed 760 : pmMode(0)
Deleting routers
route: SIOCDELRT: No such process
Adding router 192.168.137.1
Recreating /customer/wifi/resolv.conf
Adding DNS server 192.168.137.1

6.3. 查看wlan0配置信息¶

ifconfig wlan0
    wlan0     Link encap:Ethernet  HWaddr 24:14:07:24:AC:73
    inet addr:192.168.137.88  Bcast:192.168.137.255  Mask:255.255.255.0
    UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
    RX packets:969 errors:0 dropped:376 overruns:0 frame:0
    TX packets:143 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:349252 (341.0 KiB)  TX bytes:11152 (10.8 KiB)

6.4. 网络验证¶

ping -I wlan0 www.baidu.com
PING www.baidu.com (163.177.151.109): 56 data bytes
64 bytes from 163.177.151.109: seq=0 ttl=128 time=54.557 ms
64 bytes from 163.177.151.109: seq=1 ttl=128 time=14.317 ms
64 bytes from 163.177.151.109: seq=2 ttl=128 time=4.245 ms
64 bytes from 163.177.151.109: seq=3 ttl=128 time=4.082 ms

SSU_DNS及DHCP配置说明