126 lines
3.4 KiB
Bash
126 lines
3.4 KiB
Bash
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#!/system/bin/sh
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valid_interface=()
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NAT_INTERFACE=""
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NAT_IP=""
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NAT_FREQ=""
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IS_NETWORK_CHANGE=0
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# 输出日志到Android的logcat
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# 需要两个参数，第一个固定为$LINENO
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# 第二个为要输出的日志
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# 如：print_log $LINENO "print_log test"
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print_log(){
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line_no=$1
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log=$2
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logcat="/system/bin/log -t host_network.sh\(line:$line_no\) $log"
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eval "$logcat"
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}
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# 使用host网络，需要重新配置tcp port，重启adbd，避免网络adb异常
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# 这边tcp port选择与aic.sh中定义的一致
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restart_adbd(){
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print_log $LINENO "restart adbd"
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container_no=$(getprop ro.container.container_id)
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tcp_port_pre="110"
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tcp_port=$tcp_port_pre$container_no
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# 默认server端口号是5037,使用host网络，会和宿主机adbd的server端口冲突
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server_port=$((5038+$container_no))
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print_log $LINENO "restart adbd tcp_port: $tcp_port"
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setprop service.adb.tcp.port $tcp_port
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setprop ro.container.adbd.server.port $server_port
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kill -9 `pgrep adb`
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start adbd
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}
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get_interface(){
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valid_interface=()
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all_interfaces=$(ip link show | awk -F': ' '{print $2}' | grep -v "lo" | grep -v veth | grep -v docker | grep -v dummy0)
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for interface in $all_interfaces; do
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if ping -I $interface -c 1 -W 1 www.baidu.com &> /dev/null; then
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print_log $LINENO "foud valid interface: $interface"
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valid_interface+=($interface)
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fi
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done
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}
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set_nat_for_docker0(){
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interface=$1
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# get default gateway
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gateway=$(ip -4 route list table 0 | grep default | grep $interface | awk '{print $3}')
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# get ip_addr: 172.16.21.199/24
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ip_addr=$(ip -4 addr show dev $interface | awk '/inet / {print $2}')
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NAT_INTERFACE=$interface
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NAT_IP=$ip_addr
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NAT_FREQ=$(iw dev $interface link | grep freq |awk '{print $2}')
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print_log $LINENO "interface=$interface, gateway=$gateway, ip_addr=$ip_addr, freq=$NAT_FREQ"
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ip rule add from all lookup main pref 9999
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ip r a default via $gateway dev $interface proto static t main
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ndc nat enable docker0 $interface 2 $ip_addr
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echo 1 > /proc/sys/net/ipv4/ip_forward
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restart_adbd
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}
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is_network_change(){
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interface=$1
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ip_addr=$(ip -4 addr show dev $interface | awk '/inet / {print $2}')
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if [ "$ip_addr" == "$NAT_IP" ]; then
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ping -I $interface -c 1 -W 1 www.baidu.com &> /dev/null
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if [ $? -ne 0 ] ; then
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IS_NETWORK_CHANGE=1
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fi
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# wifi切换频率（2.4G->5G）也有可能导致使用bridge网络的容器网络异常
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# 所以网络频率切换也视为网络变化
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FREQ=$(iw dev $interface link | grep freq |awk '{print $2}')
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if [ "$FREQ" == "$NAT_FREQ" ]; then
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IS_NETWORK_CHANGE=0
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else
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IS_NETWORK_CHANGE=1
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fi
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else
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IS_NETWORK_CHANGE=1
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fi
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}
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main(){
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while true; do
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get_interface
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if [ ${#valid_interface[@]} -eq 0 ]; then
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print_log $LINENO "Not found valid interface to connect network"
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sleep 5
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else
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first_interface=${valid_interface[0]}
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set_nat_for_docker0 $first_interface
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break
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fi
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done
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while true; do
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is_network_change $NAT_INTERFACE
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if [ $IS_NETWORK_CHANGE == "1" ] ; then
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print_log $LINENO "May network status change, will reset nat for docker0"
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get_interface
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if [ ${#valid_interface[@]} -eq 0 ]; then
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print_log $LINENO "Not found valid interface to connect network"
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NAT_IP=""
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NAT_FREQ=""
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sleep 3
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continue
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fi
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first_interface=${valid_interface[0]}
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set_nat_for_docker0 $first_interface
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fi
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# 执行adb root等命令可能导致adbd异常退出，原因待查，此为workround
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adbd_pid=$(pgrep adbd)
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if [ -z $adbd_pid ]; then
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restart_adbd
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fi
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sleep 3
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done
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}
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main "$@"
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