#!/bin/bash
# set -xv
source /opt/scripts/mesh/freq.sh # get center frequency of channel like this: ${chan2g["1"]} 'OR' ${chan5g["149"]}
### === INPUT ARGUMENTS ===
PHYNAME=$1
MON_INTERFACE=$2
# CHANNEL=${chan[$3]}
CHANNEL=$3
shift 3
NODES=($@)

### === NODE IDENTIFICATION ===
HOSTNAME=$(uname -n | cut -d. -f1)
NODE_ID=$(echo "$HOSTNAME" | sed -E 's/[^0-9]*([0-9]+)$/\1/')
NODE_ID=$((10#$NODE_ID))

# Check if this node is in the NODES list
NODE_INDEX=-1
for idx in "${!NODES[@]}"; do
  [[ ${NODES[$idx]} -eq $NODE_ID ]] && NODE_INDEX=$idx && break
done

if [[ $NODE_INDEX -lt 0 ]]; then
  echo "Node ID $NODE_ID ($HOSTNAME) is not in the monitor list. Exiting."
  exit 0
fi

echo "Node ID $NODE_ID is in the list — setting up monitoring interface."

### === MONITOR INTERFACE SETUP ===
PHY_PATH="/sys/kernel/debug/ieee80211/${PHYNAME}"

# Check if PHY exists
if [[ ! -d "$PHY_PATH" ]]; then
  echo "PHY $PHYNAME does not exist at $PHY_PATH"
  exit 1
fi

#!/bin/bash

# Usage: ./remove_all_wireless.sh
# Removes all interfaces on phy0 and phy1

echo "Removing all wireless interfaces on $PHYNAME..."

INTERFACES=$(iw dev | awk -v phy="${PHYNAME//[!0-9]/}" '
    $1 == "phy#"phy {getline; while ($1 == "Interface") {print $2; getline}}')

for IFACE in $INTERFACES; do
    echo " - Deleting $IFACE on $PHYNAME"
    ip link set "$IFACE" down 2>/dev/null
    iw dev "$IFACE" del
done

echo "All wireless interfaces removed."


# # Remove old monitor interface if it exists
# if ip link show "$MON_INTERFACE" &>/dev/null; then
#   echo "Removing existing $MON_INTERFACE"
#   ip link set "$MON_INTERFACE" down
#   iw dev "$MON_INTERFACE" del
# fi

# Create and enable monitor interface
echo "Creating monitor interface $MON_INTERFACE on $PHYNAME"

iw phy "$PHYNAME" interface add "$MON_INTERFACE" type monitor

sleep 2

# iw dev "$MON_INTERFACE" set channel $CHANNEL HT40+

# echo "channel=$CHANNEL / freq=$FREQ"

ip link set "$MON_INTERFACE" up

iw dev "$MON_INTERFACE" set channel $CHANNEL HT40+

echo "Monitor interface $MON_INTERFACE is now active."

set +x