Matrix: read raw rules that are a match and a verdict

A raw rule that matches and then accepts, drops or rejects (counter and
log allowed, no interfaces) is an exception of every pair of its chain,
shown as "raw: …", instead of unknown; one not for new connections is
skipped like any rule. Interfaces, jumps, NAT, set and verdict maps
stay unknown. The imported IPv6 neighbour discovery rule (hop limit
255) now reads as allowed.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/matrix/matrix_test.go

@@ -158,3 +158,42 @@ func TestSummary(t *testing.T) {
 		t.Errorf("a drop policy's mark: %v", c.Marks)
 	}
 }
+
+// TestRaw: raw rules that are a match and a verdict are read; others stay
+// unknown.
+func TestRaw(t *testing.T) {
+	for _, c := range []struct {
+		raw, verdict, short string
+		ok, forNew          bool
+	}{
+		{"icmpv6 type { nd-router-solicit, nd-neighbor-advert } ip6 hoplimit 255 accept", "allowed", "icmpv6", true, true},
+		{`tcp dport 22 counter log prefix "ssh: " drop comment "x"`, "blocked", "tcp dport 22", true, true},
+		{"ip saddr 10.0.0.1 reject with icmpx type admin-prohibited", "blocked", "ip saddr 10.0.0.1", true, true},
+		{"ct state established,related accept", "allowed", "ct state established,related", true, false},
+		{"ct state { new, untracked } tcp dport 80 accept", "allowed", "ct state { new, untracked } tcp dport 80", true, true},
+		{"counter accept", "allowed", "", true, true},
+		{`iifname "wan" tcp dport 22 accept`, "", "", false, false},
+		{"tcp dport vmap { 22 : accept }", "", "", false, false},
+		{"meta mark set 1 accept", "", "", false, false},
+		{"tcp dport 22 counter", "", "", false, false},
+	} {
+		rr := readRaw(c.raw)
+		if rr.ok != c.ok || c.ok && (rr.verdict != c.verdict || rr.short != c.short || rr.forNew != c.forNew) {
+			t.Errorf("%q: %+v", c.raw, rr)
+		}
+	}
+	// In a pair: an exception that lets ND in, not "unknown".
+	st := state()
+	st.Rules = append(st.Rules, &model.Rule{ID: 90, Chain: "input", Position: 0.5, Raw: "icmpv6 type { nd-router-solicit } ip6 hoplimit 255 accept"})
+	st.Sort()
+	e := find(Build(st), "wan", Firewall).Exceptions
+	found := false
+	for _, x := range e {
+		if x.RuleID == 90 {
+			found = x.Verdict == "allowed" && x.Short == "icmpv6" && strings.HasPrefix(x.What, "raw: icmpv6 type")
+		}
+	}
+	if !found {
+		t.Errorf("the raw ND rule: %+v", e)
+	}
+}