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After wifi is used as a hotspot in SAIL-AM335x, other devices can access the external network through the wifi hotspot.

Shulou Source: shulou.com Published: 2022-06-02 20:26:58 10月04日 Update

What I want to share with you today is the method for other devices to access the external network through the wifi hotspot in sail-am335x through the wifi hotspot. The specific steps are as follows:

1.335x has been transplanted before the hostapd; can be directly used as rtwap, the password is 87654321

2.dhcpd profile modification

Create an empty file / var/db/dhcpd.leases

Mkdir-p / var/db

Touch / var/db/dhcpd.leases

3.ifconfig eth0 up

Udhcpc-I eth0

Ifconfig wlan0 up

Ifconfig wlan0 10.5.5.1 netmask 255.255.255.0

Echo 1 > / proc/sys/net/ipv4/ip_forward / turn on IP forwarding /

/ sbin/iptables-t nat-A POSTROUTING-oeth0-j MASQUERADE

Set the promiscuous mode of the network card

Ifconfig wlan0 promisc

[3725.324000] device wlan0 enteredpromiscuous mode

Dhcpd-cf / etc/dhcpd.conf wlan0 &

Hostapd / etc/hostapd.conf-B

4. Iptables is needed in the previous command, and iptables needs to be migrated in the file system (iptables compilation)

. / configure-host=arm-arago-linux-gnueabi--prefix=/root/335x/localcode/iptables/install-disable-nftables--with-ksource=/root/335x/localcode/kernel-3.2.0-enable-static-disable-shared

Make

Make install

After compilation, you need to port iptables to the development board.

Iptables support also needs to be configured in the kernel

[*] Networking support->

Networking options-- > [*] Network packet filteringframework (Netfilter)-- > Core NetfilterConfiguration-- > (all selected) IP: NetfilterConfiguration-- > (all selected)

C method that other devices can access the external network through the YM hotspot after wifi is used as a hotspot in the wifi hotspot.