lucca
61 lines
1.7 KiB
Bash
Executable File
61 lines
1.7 KiB
Bash
Executable File
#!/bin/sh
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# Reliable local-only hotspot using Android SoftAP
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# 1. Turn Android Hotspot ON first
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# 2. Run this script
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IFACE="wlan1"
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AP_IP="192.168.43.1"
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NET="192.168.43.0/24"
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DHCP_RANGE="192.168.43.10,192.168.43.50,12h"
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[ "$(id -u)" -ne 0 ] && { echo "Need root"; exit 1; }
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if ! ip link show "$IFACE" >/dev/null 2>&1; then
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echo "Turn the Android Hotspot ON first, then run this script."
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exit 1
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fi
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echo "[*] Taking control of Android SoftAP on $IFACE..."
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# Only kill DHCP, leave Android's hostapd running
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killall dnsmasq 2>/dev/null
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sleep 1
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# Disable reverse path filter
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echo 0 > /proc/sys/net/ipv4/conf/all/rp_filter
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echo 0 > /proc/sys/net/ipv4/conf/$IFACE/rp_filter 2>/dev/null
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# Add our gateway IP (keep whatever Android already has)
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ip addr add $AP_IP/24 broadcast 192.168.43.255 dev $IFACE 2>/dev/null
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ip link set $IFACE up
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ip route add $NET dev $IFACE src $AP_IP 2>/dev/null
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# Allow traffic
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iptables -C INPUT -i $IFACE -j ACCEPT 2>/dev/null || iptables -I INPUT -i $IFACE -j ACCEPT
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iptables -C OUTPUT -o $IFACE -j ACCEPT 2>/dev/null || iptables -I OUTPUT -o $IFACE -j ACCEPT
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iptables -C FORWARD -i $IFACE -j ACCEPT 2>/dev/null || iptables -I FORWARD -i $IFACE -j ACCEPT
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iptables -C FORWARD -o $IFACE -j ACCEPT 2>/dev/null || iptables -I FORWARD -o $IFACE -j ACCEPT
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# Start our DHCP
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dnsmasq \
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--interface=$IFACE \
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--bind-interfaces \
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--dhcp-range=$DHCP_RANGE \
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--dhcp-option=3,$AP_IP \
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--dhcp-option=6,$AP_IP \
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--port=0 \
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--no-resolv \
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--pid-file=/tmp/dnsmasq-$IFACE.pid &
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sleep 2
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echo
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echo "=== Local-only Hotspot Ready ==="
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echo "SSID & Password = whatever you set in Android Hotspot settings"
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echo "Gateway = $AP_IP"
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echo
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ip -4 addr show $IFACE
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echo
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echo "Connect your PC and ping 192.168.43.1"
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