mirror of
https://github.com/vrtmrz/obsidian-livesync.git
synced 2026-07-09 14:23:09 +00:00
vorotamoroz
81 lines
2.0 KiB
Bash
81 lines
2.0 KiB
Bash
#!/usr/bin/env sh
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set -eu
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profile="${NETEM_PROFILE:-home-wifi}"
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iface="${NETEM_INTERFACE:-eth0}"
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delay_ms="${NETEM_DELAY_MS:-20}"
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jitter_ms="${NETEM_JITTER_MS:-5}"
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loss_percent="${NETEM_LOSS_PERCENT:-0.1}"
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bandwidth_mbit="${NETEM_BANDWIDTH_MBIT:-100}"
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mtu="${NETEM_MTU:-1500}"
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listen_port="${SHIM_LISTEN_PORT:-5984}"
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target_host="${SHIM_TARGET_HOST:-couchdb}"
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target_port="${SHIM_TARGET_PORT:-5984}"
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out_root="${NETEM_RESULT_ROOT:-/bench-results}"
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timestamp="$(date -u +%Y%m%d-%H%M%S)"
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out_dir="${out_root}/netem-shim-${profile}-${timestamp}"
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out_file="${out_dir}/summary.json"
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json_lines() {
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awk '
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{
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gsub(/\\/, "\\\\");
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gsub(/"/, "\\\"");
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printf "%s \"%s\"", (NR == 1 ? "" : ",\n"), $0;
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}
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'
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}
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mkdir -p "$out_dir"
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if ! ip link show "$iface" >/dev/null 2>&1; then
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echo "Network interface '$iface' was not found" >&2
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ip addr >&2
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exit 2
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fi
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ip link set dev "$iface" mtu "$mtu"
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tc qdisc del dev "$iface" root >/dev/null 2>&1 || true
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tc qdisc add dev "$iface" root netem \
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delay "${delay_ms}ms" "${jitter_ms}ms" \
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loss "${loss_percent}%" \
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rate "${bandwidth_mbit}mbit"
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ip_addr="$(ip addr show "$iface" | json_lines)"
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ip_route="$(ip route | json_lines)"
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tc_qdisc="$(tc qdisc show dev "$iface" | json_lines)"
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cat > "$out_file" <<EOF
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{
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"simulationTier": 2,
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"mode": "netem-tcp-shim",
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"profile": "$profile",
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"interface": "$iface",
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"listenPort": $listen_port,
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"targetHost": "$target_host",
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"targetPort": $target_port,
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"netem": {
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"delayMs": $delay_ms,
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"jitterMs": $jitter_ms,
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"lossPercent": $loss_percent,
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"bandwidthMbit": $bandwidth_mbit,
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"mtu": $mtu
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},
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"ipAddr": [
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$ip_addr
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],
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"ipRoute": [
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$ip_route
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],
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"tcQdisc": [
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$tc_qdisc
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]
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}
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EOF
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cat "$out_file"
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echo "[netem-shim] forwarding 0.0.0.0:${listen_port} to ${target_host}:${target_port}"
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echo "[netem-shim] result file: $out_file"
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exec socat "TCP-LISTEN:${listen_port},fork,reuseaddr" "TCP:${target_host}:${target_port}"
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