67 lines
1.8 KiB
Bash
67 lines
1.8 KiB
Bash
#!/usr/bin/env bash
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set -euo pipefail
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PORT=6053
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NAME="%h (Linux Voice Assistant)"
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SERVICE=/etc/avahi/services/esphome-lva.service
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# Wait up to ~40s for any global IPv4 (cosmetic: to include ipv4_* TXT)
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deadline=$((SECONDS+40))
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while [ $SECONDS -lt $deadline ]; do
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ip -o -4 addr show up scope global | grep -q . && break || true
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sleep 1
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done
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# Collect all UP, non-loopback ifaces
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mapfile -t IFACES < <(ip -o link show up | awk -F': ' '{print $2}' | grep -v '^lo$' | sort -u)
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TXT=" <txt-record>platform=linux</txt-record>
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"
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LIST=""
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for i in "${IFACES[@]}"; do
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[ -e "/sys/class/net/$i/address" ] || continue
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mac=$(cat "/sys/class/net/$i/address")
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mac_nc=${mac//:/} # no colons (ESPHome style)
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if [ -d "/sys/class/net/$i/wireless" ] || [[ "$i" == wl* ]]; then net=wifi; else net=ethernet; fi
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TXT+=" <txt-record>net_${i}=${net}</txt-record>
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"
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TXT+=" <txt-record>mac_${i}=${mac_nc}</txt-record>
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"
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# IPv4 (global)
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while read -r a; do
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[ -n "$a" ] || continue
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a=${a%%/*}
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TXT+=" <txt-record>ipv4_${i}=${a}</txt-record>
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"
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done < <(ip -o -4 addr show dev "$i" scope global | awk '{print $4}' || true)
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# IPv6 (global, not link-local)
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while read -r a6; do
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[ -n "$a6" ] || continue
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a6=${a6%%/*}
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TXT+=" <txt-record>ipv6_${i}=${a6}</txt-record>
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"
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done < <(ip -o -6 addr show dev "$i" scope global | awk '{print $4}' || true)
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LIST+="${i},"
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done
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LIST=${LIST%,}
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cat >"$SERVICE" <<XML
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<?xml version="1.0" standalone='no'?><!--*-nxml-*-->
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<!DOCTYPE service-group SYSTEM "avahi-service.dtd">
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<service-group>
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<name replace-wildcards="yes">${NAME}</name>
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<service>
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<type>_esphomelib._tcp</type>
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<port>${PORT}</port>
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<txt-record>ifaces=${LIST}</txt-record>
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${TXT} </service>
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</service-group>
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XML
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# Avahi will (re)publish on all active ifaces automatically
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systemctl restart avahi-daemon || true
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