143 lines
4.8 KiB
Bash
143 lines
4.8 KiB
Bash
#!/usr/bin/env bash
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# exit if a command fails
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set -o errexit
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# exit if required variables are not set
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set -o nounset
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# check for dependencies
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script_commands="iw"
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missing_counter=0
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for needed_command in ${script_commands}; do
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if ! hash "${needed_command}" >/dev/null 2>&1; then
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printf "Command not found in PATH: %s\n" "${needed_command}" >&2
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((missing_counter++))
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fi
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done
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if ((missing_counter > 0)); then
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printf "Minimum %d commands are missing in PATH, aborting.\n" "${missing_counter}" >&2
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exit 1
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fi
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# create function displaying usage
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usage() {
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echo -e "\nUsage: $0 <interface>"
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exit 1
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}
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# make sure the correct number of arguments are passed; if not, output syntax and exit
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if [ "$#" -ne 1 ]; then
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usage
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fi
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# set interface variable
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interface="$1"
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# download oui database, if not present
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oui_database="/tmp/oui.txt"
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if [ ! -f "${oui_database}" ]; then
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curl http://standards-oui.ieee.org/oui/oui.txt > "${oui_database}"
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fi
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# find vendor from oui list
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find_vendor () {
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local vendor_id
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vendor_id="$(echo "$1" | cut -d":" -f1-3 | tr "[:lower:]" "[:upper:]" | sed 's_:_-_g')"
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local vendor_name
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vendor_name="$(grep -m1 "${vendor_id}" "${oui_database}" | awk '{$1=$2=""; print $0}' | xargs | tr -d '[:cntrl:]')"
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if [ ! -z "${vendor_name}" ]; then
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echo "${vendor_name}"
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else
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echo "Unknown"
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fi
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}
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# parse out relevant information
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essid="$(iw dev "${interface}" link | grep "SSID" | awk '{$1=""; print substr($0,2)}')"
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bssid="$(iw dev "${interface}" link | grep "Connected" | awk '{print $3}')"
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ap_vendor="$(find_vendor "${bssid}")"
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rx_index="$(iw dev "${interface}" link | grep "rx bitrate" | awk '{print $5,$6}')"
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tx_index="$(iw dev "${interface}" link | grep "tx bitrate" | awk '{print $5,$6}')"
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rx_spacial_streams="$(iw dev "${interface}" link | grep "rx bitrate" | sed 's/short //g' | awk '{print $(NF-1),$NF}')"
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tx_spacial_streams="$(iw dev "${interface}" link | grep "tx bitrate" | sed 's/short //g' | awk '{print $(NF-1),$NF}')"
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client_mac="$(ip link | grep -A1 "${interface}" | grep -P "link/ether" | awk '{print $2}')"
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client_vendor="$(find_vendor "${client_mac}")"
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ip="$(ip -f inet addr show "${interface}" | grep -Po "inet \K[\d./,]+")"
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freq="$(iw dev "${interface}" link | grep "freq" | awk '{print $2}')"
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channel_width="$(iw dev "${interface}" link | grep "rx bitrate" | awk '{print $7}')"
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signal="$(iw dev "${interface}" link | grep "signal" | awk '{$1=""; print substr($0,2)}')"
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rx_phy_rate="$(iw dev "${interface}" link | grep "rx" | awk '{print $3}')"
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rx_units="$(iw dev "${interface}" link | grep "rx" | awk '{print $4}' | sed 's/Bit/bit/')"
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rx_mac_rate="$(echo "$(echo "${rx_phy_rate}" | cut -d " " -f1)*0.8" | bc)"
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tx_phy_rate="$(iw dev "${interface}" link | grep "tx" | awk '{print $3}')"
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tx_units="$(iw dev "${interface}" link | grep "tx" | awk '{print $4}' | sed 's/Bit/bit/')"
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tx_mac_rate="$(echo "$(echo "${tx_phy_rate}" | cut -d " " -f1)*0.8" | bc)"
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# identify rx modulation
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if [ "${rx_index}" == "VHT-MCS 0" ]; then
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rx_modulation="BPSK"
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elif [ "${rx_index}" == "VHT-MCS 1" ]; then
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rx_modulation="QPSK"
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elif [ "${rx_index}" == "VHT-MCS 2" ]; then
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rx_modulation="PQSK"
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elif [ "${rx_index}" == "VHT-MCS 3" ]; then
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rx_modulation="16-QAM"
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elif [ "${rx_index}" == "VHT-MCS 4" ]; then
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rx_modulation="16-QAM"
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elif [ "${rx_index}" == "VHT-MCS 5" ]; then
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rx_modulation="16-QAM"
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elif [ "${rx_index}" == "VHT-MCS 6" ]; then
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rx_modulation="64-QAM"
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elif [ "${rx_index}" == "VHT-MCS 7" ]; then
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rx_modulation="64-QAM"
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elif [ "${rx_index}" == "VHT-MCS 8" ]; then
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rx_modulation="256-QAM"
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elif [ "${rx_index}" == "VHT-MCS 9" ]; then
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rx_modulation="256-QAM"
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else
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rx_modulation="n/a"
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fi
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# identify tx modulation
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if [ "${tx_index}" == "VHT-MCS 0" ]; then
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tx_modulation="BPSK"
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elif [ "${tx_index}" == "VHT-MCS 1" ]; then
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tx_modulation="QPSK"
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elif [ "${tx_index}" == "VHT-MCS 2" ]; then
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tx_modulation="PQSK"
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elif [ "${tx_index}" == "VHT-MCS 3" ]; then
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tx_modulation="16-QAM"
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elif [ "${tx_index}" == "VHT-MCS 4" ]; then
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tx_modulation="16-QAM"
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elif [ "${tx_index}" == "VHT-MCS 5" ]; then
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tx_modulation="16-QAM"
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elif [ "${tx_index}" == "VHT-MCS 6" ]; then
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tx_modulation="64-QAM"
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elif [ "${tx_index}" == "VHT-MCS 7" ]; then
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tx_modulation="64-QAM"
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elif [ "${tx_index}" == "VHT-MCS 8" ]; then
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tx_modulation="256-QAM"
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elif [ "${tx_index}" == "VHT-MCS 9" ]; then
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tx_modulation="256-QAM"
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else
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tx_modulation="n/a"
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fi
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# display formatted output
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echo
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echo " ESSID: ${essid}"
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echo " My IP: ${ip}"
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echo
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echo " AP MAC: ${bssid} (${ap_vendor})"
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echo " STA MAC: ${client_mac} (${client_vendor})"
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echo
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echo " Frequency: ${freq}MHz (${channel_width} channel)"
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echo " Signal: ${signal}"
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echo
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echo " PHY Rx: ${rx_phy_rate}${rx_units} / Tx: ${tx_phy_rate}${tx_units} (Physical link speed)"
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echo " MAC Rx: ${rx_mac_rate}${rx_units} / Tx: ${tx_mac_rate}${tx_units} (Best-case throughput)"
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echo
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echo " Modulation:"
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echo " Rx: ${rx_modulation} / Tx: ${tx_modulation}"
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