fuzz: target for pong

Fuzz the decoding and encoding of pong.

tests/fuzz/fuzz-wire-pong.c

@@ -0,0 +1,34 @@
+#include "config.h"
+#include <ccan/mem/mem.h>
+#include <tests/fuzz/libfuzz.h>
+#include <tests/fuzz/wire.h>
+#include <wire/peer_wire.h>
+
+struct pong {
+	u8 *ignored;
+};
+
+static void *encode(const tal_t *ctx, const struct pong *s)
+{
+	return towire_pong(ctx, s->ignored);
+}
+
+static struct pong *decode(const tal_t *ctx, const void *p)
+{
+	struct pong *s = tal(ctx, struct pong);
+
+	if (fromwire_pong(s, p, &s->ignored))
+		return s;
+	return tal_free(s);
+}
+
+static bool equal(const struct pong *x, const struct pong *y)
+{
+	return memeq(x->ignored, tal_bytelen(x->ignored), y->ignored,
+		     tal_bytelen(y->ignored));
+}
+
+void run(const u8 *data, size_t size)
+{
+	test_decode_encode(data, size, WIRE_PONG, struct pong);
+}