70 lines
2.0 KiB
Go
70 lines
2.0 KiB
Go
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package aggregate
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import (
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"fmt"
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"io"
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"sort"
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"github.com/netsynth/netsynth/classify"
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)
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// PrintSummary writes a per-protocol packet count summary to w (typically os.Stderr).
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// Output format matches tcpdump conventions (CLAS-03): per-protocol counts with
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// percentages and a TOTAL line, sorted alphabetically for stable output.
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func PrintSummary(w io.Writer, totals map[classify.TrafficClass]int64) {
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var totalPackets int64
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for _, count := range totals {
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totalPackets += count
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}
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fmt.Fprintln(w, "\n--- Protocol Summary ---")
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// Sort classes for stable output.
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classes := make([]string, 0, len(totals))
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for c := range totals {
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classes = append(classes, string(c))
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}
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sort.Strings(classes)
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for _, className := range classes {
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c := classify.TrafficClass(className)
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count := totals[c]
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pct := 0.0
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if totalPackets > 0 {
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pct = float64(count) / float64(totalPackets) * 100.0
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}
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fmt.Fprintf(w, " %-15s %8d packets (%5.1f%%)\n", c, count, pct)
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}
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fmt.Fprintf(w, " %-15s %8d packets\n", "TOTAL", totalPackets)
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}
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// PrintWindowLine writes a single verbose per-window activity line to w (CLAS-04).
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// Format: [window N] CLASS:count CLASS:count ... (total: N)
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// Classes with zero counts are omitted. Output is sorted for deterministic display.
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func PrintWindowLine(w io.Writer, snap classify.WindowSnapshot) {
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fmt.Fprintf(w, "[window %d]", snap.WindowIndex)
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// Sort for stable output.
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classes := make([]string, 0, len(snap.Counts))
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for c := range snap.Counts {
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classes = append(classes, string(c))
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}
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sort.Strings(classes)
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for _, className := range classes {
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c := classify.TrafficClass(className)
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if snap.Counts[c] > 0 {
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fmt.Fprintf(w, " %s:%d", c, snap.Counts[c])
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}
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}
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fmt.Fprintf(w, " (total: %d)\n", snap.TotalPackets)
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}
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// AccumulateTotals merges a WindowSnapshot's counts into cumulative totals.
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// This is used to build the final summary passed to PrintSummary.
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func AccumulateTotals(totals map[classify.TrafficClass]int64, snap classify.WindowSnapshot) {
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for class, count := range snap.Counts {
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totals[class] += count
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}
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}
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