From 7b35687fc5a4239d3e1f900e2debaa307926fe43 Mon Sep 17 00:00:00 2001
From: Zakary Timson <zaktimson@gmail.com>
Date: Mon, 31 Aug 2026 19:43:28 -0400
Subject: [PATCH] Add access-point.sh

---
 access-point.sh | 136 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 access-point.sh

diff --git a/access-point.sh b/access-point.sh
new file mode 100644
index 0000000..590f3da
--- /dev/null
+++ b/access-point.sh
@@ -0,0 +1,136 @@
+#!/bin/bash
+
+# Configuration =======================================================================================================
+WLAN0_IFACE="wlan0"
+DHCP_IP="10.10.10.1"
+DHCP_START="10.10.10.100"
+DHCP_END="10.10.10.250"
+
+SSID="$HOSTNAME"
+PASSWORD="guesswhatitis"
+# End of Configuration ================================================================================================
+
+is_connected() {
+    [ -n "$(iwgetid -r 2>/dev/null)" ]
+}
+
+is_ap_on() {
+    [ "$(systemctl is-active hostapd 2>/dev/null)" == "active" ]
+}
+
+enable_ap() {
+    if is_ap_on; then return; fi
+    echo "[$(date '+%H:%M:%S')] Enabling AP: $SSID"
+    # Bring down wlan0 and reset it
+    ip link set $WLAN0_IFACE down 2>/dev/null || true
+    sleep 1
+    ip link set $WLAN0_IFACE up 2>/dev/null || true
+    sleep 1
+    # Assign static IP for AP
+    ip addr flush dev $WLAN0_IFACE 2>/dev/null || true
+    ip addr add "$DHCP_IP/24" dev $WLAN0_IFACE
+    # Configure hostapd
+    cat > /etc/hostapd/hostapd.conf <<EOF
+interface=$WLAN0_IFACE
+ssid=$SSID
+hw_mode=g
+channel=6
+wpa=2
+wpa_passphrase=$PASSWORD
+wpa_key_mgmt=WPA-PSK
+wpa_pairwise=CCMP
+EOF
+    systemctl unmask hostapd 2>/dev/null || true
+    systemctl start hostapd
+    # Configure dnsmasq for DHCP
+    cat > /etc/dnsmasq.conf <<EOF
+interface=$WLAN0_IFACE
+dhcp-range=$DHCP_START,$DHCP_END,255.255.255.0,24h
+EOF
+    systemctl restart dnsmasq
+}
+
+disable_ap() {
+    if ! is_ap_on; then return; fi
+    echo "[$(date '+%H:%M:%S')] Disabling AP"
+    systemctl stop hostapd 2>/dev/null || true
+    systemctl restart dnsmasq 2>/dev/null || true
+    ip addr del "$DHCP_IP/24" dev $WLAN0_IFACE 2>/dev/null || true
+}
+
+# Main loop
+echo "AP Failover Service started"
+while true; do
+    is_connected && disable_ap || enable_ap
+    sleep 30
+done
+root@radio:/# ls
+access-point.sh  boot  etc   lib         media  opt   root  sbin  sys  usr
+bin              dev   home  lost+found  mnt    proc  run   srv   tmp  var
+root@radio:/# cat access-point.sh
+#!/bin/bash
+
+# Configuration =======================================================================================================
+WLAN0_IFACE="wlan0"
+DHCP_IP="10.10.10.1"
+DHCP_START="10.10.10.100"
+DHCP_END="10.10.10.250"
+
+SSID="$HOSTNAME"
+PASSWORD="guesswhatitis"
+# End of Configuration ================================================================================================
+
+is_connected() {
+    [ -n "$(iwgetid -r 2>/dev/null)" ]
+}
+
+is_ap_on() {
+    [ "$(systemctl is-active hostapd 2>/dev/null)" == "active" ]
+}
+
+enable_ap() {
+    if is_ap_on; then return; fi
+    echo "[$(date '+%H:%M:%S')] Enabling AP: $SSID"
+    # Bring down wlan0 and reset it
+    ip link set $WLAN0_IFACE down 2>/dev/null || true
+    sleep 1
+    ip link set $WLAN0_IFACE up 2>/dev/null || true
+    sleep 1
+    # Assign static IP for AP
+    ip addr flush dev $WLAN0_IFACE 2>/dev/null || true
+    ip addr add "$DHCP_IP/24" dev $WLAN0_IFACE
+    # Configure hostapd
+    cat > /etc/hostapd/hostapd.conf <<EOF
+interface=$WLAN0_IFACE
+ssid=$SSID
+hw_mode=g
+channel=6
+wpa=2
+wpa_passphrase=$PASSWORD
+wpa_key_mgmt=WPA-PSK
+wpa_pairwise=CCMP
+EOF
+    systemctl unmask hostapd 2>/dev/null || true
+    systemctl start hostapd
+    # Configure dnsmasq for DHCP
+    cat > /etc/dnsmasq.conf <<EOF
+interface=$WLAN0_IFACE
+dhcp-range=$DHCP_START,$DHCP_END,255.255.255.0,24h
+EOF
+    systemctl restart dnsmasq
+}
+
+disable_ap() {
+    if ! is_ap_on; then return; fi
+    echo "[$(date '+%H:%M:%S')] Disabling AP"
+    systemctl stop hostapd 2>/dev/null || true
+    systemctl restart dnsmasq 2>/dev/null || true
+    ip addr del "$DHCP_IP/24" dev $WLAN0_IFACE 2>/dev/null || true
+}
+
+# Main loop
+echo "AP Failover Service started"
+while true; do
+    is_connected && disable_ap || enable_ap
+    sleep 30
+done
\ No newline at end of file