Core packages: config validation, network renderers, root helper, auth, SQLite store, capture engine

Capture engine streams dumpcap pcapng into verbatim, hashed segments with
per-segment tshark summaries; display filters, PDML dissection with verified
byte ranges, export and import. Tests run in a Debian trixie container.

internal/helper/parse.go

@@ -0,0 +1,75 @@
+package helper
+
+import (
+	"bufio"
+	"strconv"
+	"strings"
+)
+
+// ParseStationDump parses `iw dev X station dump` output.
+func ParseStationDump(s string) []Station {
+	var out []Station
+	var cur *Station
+	sc := bufio.NewScanner(strings.NewReader(s))
+	for sc.Scan() {
+		line := sc.Text()
+		if strings.HasPrefix(line, "Station ") {
+			f := strings.Fields(line)
+			if len(f) >= 2 {
+				out = append(out, Station{MAC: strings.ToLower(f[1])})
+				cur = &out[len(out)-1]
+			}
+			continue
+		}
+		if cur == nil {
+			continue
+		}
+		k, v, ok := strings.Cut(strings.TrimSpace(line), ":")
+		if !ok {
+			continue
+		}
+		f := strings.Fields(v)
+		if len(f) == 0 {
+			continue
+		}
+		n, err := strconv.ParseInt(f[0], 10, 64)
+		if err != nil {
+			continue
+		}
+		switch k {
+		case "inactive time":
+			cur.InactiveMS = n
+		case "rx bytes":
+			cur.RxBytes = uint64(n)
+		case "tx bytes":
+			cur.TxBytes = uint64(n)
+		case "signal":
+			v := int(n)
+			cur.SignalDBm = &v
+		case "connected time":
+			cur.ConnectedS = n
+		}
+	}
+	return out
+}
+
+// ParseLeases parses a dnsmasq lease file: "expiry mac ip hostname clientid".
+func ParseLeases(s string) []Lease {
+	var out []Lease
+	for _, line := range strings.Split(s, "\n") {
+		f := strings.Fields(line)
+		if len(f) < 4 {
+			continue
+		}
+		exp, err := strconv.ParseInt(f[0], 10, 64)
+		if err != nil {
+			continue
+		}
+		h := f[3]
+		if h == "*" {
+			h = ""
+		}
+		out = append(out, Lease{Expiry: exp, MAC: strings.ToLower(f[1]), IP: f[2], Hostname: h})
+	}
+	return out
+}