Android System Programming

Initializing network interface eth1

To initialize eth1, we can refer to the initialization of eth0 in the emulator. The network interface eth0 is initialized in the system/etc/init.goldfish.sh shell script as follows:

#!/system/bin/sh # Setup networking when boot starts ifconfig eth0 10.0.2.15 netmask 255.255.255.0 up route add default gw 10.0.2.2 dev eth0 ... 

As we can see, a fixed IP address 10.0.2.15 is assigned to the eth0 interface. We can add the following commands to initialize the interface eth1:

ifconfig eth1 up dhcpcd -d eth1 

In the preceding commands, we enable the interface eth1 first using the ifconfig command. Then, instead of using a fixed IP address, we use the DHCP client to get the IP address for eth1.

As we discussed ...