51 lines
1.4 KiB
Bash
Executable File
51 lines
1.4 KiB
Bash
Executable File
#!/usr/bin/env bash
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# ssh-mdns-proxy: Resolve .local via mDNS with fallbacks, then connect
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# Usado como ProxyCommand en ~/.ssh/config
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#
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# PERSONALIZAR:
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# - ALIASES: agregar tus hosts con nombres cortos
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# - TS_DOMAIN: cambiar a tu dominio Tailscale (ver: tailscale status)
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# - Si no usas Tailscale, el fallback simplemente se salta
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HOST="$1"
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PORT="${2:-22}"
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CACHE="$HOME/.ssh/mdns-cache"
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QUERY="${HOST%.local}"
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# --- PERSONALIZAR: aliases de tus equipos ---
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declare -A ALIASES=(
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[dell]="dell-latitude3400"
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[lenovo]="lenovo-ideapad"
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)
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# --- PERSONALIZAR: dominio Tailscale ---
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TS_DOMAIN="tailb0bb74.ts.net"
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[[ -n "${ALIASES[$QUERY]}" ]] && QUERY="${ALIASES[$QUERY]}"
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# 1. mDNS resolution (red local)
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IP=$("$HOME/.local/bin/mdns-resolve" "${QUERY}.local" 2 2>/dev/null)
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# 2. Fallback: Tailscale DNS (fuera de LAN)
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if [[ -z "$IP" ]]; then
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IP=$(getent hosts "${QUERY}.${TS_DOMAIN}" 2>/dev/null | awk "{print \$1}")
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fi
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# 3. Fallback: cached IP (si todo falla)
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if [[ -z "$IP" && -f "$CACHE" ]]; then
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IP=$(grep "^${QUERY} " "$CACHE" 2>/dev/null | awk "{print \$2}")
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fi
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if [[ -z "$IP" ]]; then
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echo "Error: cannot resolve ${HOST}" >&2
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exit 1
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fi
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# Save to cache for next time
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mkdir -p "$(dirname "$CACHE")"
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grep -v "^${QUERY} " "$CACHE" > "${CACHE}.tmp" 2>/dev/null || true
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echo "${QUERY} ${IP}" >> "${CACHE}.tmp"
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mv "${CACHE}.tmp" "$CACHE"
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exec nc "$IP" "$PORT"
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