tls: add pcap capturing

2026-08-21 06:59:04 +00:00 · 2026-08-08 21:31:53 -07:00
parent 9758d48696
commit 91c646c636
9 changed files with 1525 additions and 9 deletions
@@ -0,0 +1,73 @@
+package tls_test
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/soypat/lneto/x/tls"
+)
+
+// StringConst must name defined values as String does, GREASE values "GREASE"
+// and everything else "unknown", over the whole range and without allocating.
+// A constant added without extending a StringConst switch fails here.
+func TestStringConst(t *testing.T) {
+	for _, tc := range []struct {
+		name   string
+		n      int
+		grease bool // type carries GREASE values
+		str    func(int) string
+		cst    func(int) string
+	}{
+		{"ContentType", 1 << 8, false,
+			func(i int) string { return tls.ContentType(i).String() },
+			func(i int) string { return tls.ContentType(i).StringConst() }},
+		{"HandshakeType", 1 << 8, false,
+			func(i int) string { return tls.HandshakeType(i).String() },
+			func(i int) string { return tls.HandshakeType(i).StringConst() }},
+		{"AlertLevel", 1 << 8, false,
+			func(i int) string { return tls.AlertLevel(i).String() },
+			func(i int) string { return tls.AlertLevel(i).StringConst() }},
+		{"AlertDescription", 1 << 8, false,
+			func(i int) string { return tls.AlertDescription(i).String() },
+			func(i int) string { return tls.AlertDescription(i).StringConst() }},
+		{"ExtensionType", 1 << 16, true,
+			func(i int) string { return tls.ExtensionType(i).String() },
+			func(i int) string { return tls.ExtensionType(i).StringConst() }},
+		{"NamedGroup", 1 << 16, true,
+			func(i int) string { return tls.NamedGroup(i).String() },
+			func(i int) string { return tls.NamedGroup(i).StringConst() }},
+		{"SignatureScheme", 1 << 16, true,
+			func(i int) string { return tls.SignatureScheme(i).String() },
+			func(i int) string { return tls.SignatureScheme(i).StringConst() }},
+		{"CipherSuite", 1 << 16, true,
+			func(i int) string { return tls.CipherSuite(i).String() },
+			func(i int) string { return tls.CipherSuite(i).StringConst() }},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			for i := range tc.n {
+				str, cst := tc.str(i), tc.cst(i)
+				if !strings.ContainsRune(str, '(') { // stringer names undefined values "Type(9)".
+					if cst != str {
+						t.Fatalf("%s(%d)=%q want %q", tc.name, i, cst, str)
+					}
+					continue
+				}
+				want := "unknown"
+				if tc.grease && tls.IsGREASE(uint16(i)) {
+					want = "GREASE"
+				}
+				if cst != want {
+					t.Fatalf("%s(%d)=%q want %q", tc.name, i, cst, want)
+				}
+			}
+			allocs := testing.AllocsPerRun(1, func() {
+				for i := range tc.n {
+					_ = tc.cst(i)
+				}
+			})
+			if allocs != 0 {
+				t.Errorf("%s allocated %v times", tc.name, allocs)
+			}
+		})
+	}
+}