fuzz: target for channel_ready

Fuzz the decoding and encoding of channel_ready.

tests/fuzz/fuzz-wire-channel_ready.c

@@ -0,0 +1,47 @@
+#include "config.h"
+#include <assert.h>
+#include <ccan/mem/mem.h>
+#include <stdint.h>
+#include <tests/fuzz/libfuzz.h>
+#include <tests/fuzz/wire.h>
+#include <wire/peer_wire.h>
+
+struct channel_ready {
+	struct channel_id channel_id;
+	struct pubkey second_per_commitment_point;
+	struct tlv_channel_ready_tlvs *tlvs;
+};
+
+static void *encode(const tal_t *ctx, const struct channel_ready *s)
+{
+	return towire_channel_ready(ctx, &s->channel_id,
+				    &s->second_per_commitment_point, s->tlvs);
+}
+
+static struct channel_ready *decode(const tal_t *ctx, const void *p)
+{
+	struct channel_ready *s = tal(ctx, struct channel_ready);
+
+	if (fromwire_channel_ready(s, p, &s->channel_id,
+				   &s->second_per_commitment_point, &s->tlvs))
+		return s;
+	return tal_free(s);
+}
+
+static bool equal(const struct channel_ready *x, const struct channel_ready *y)
+{
+	size_t upto_tlvs = (uintptr_t)&x->tlvs - (uintptr_t)x;
+	if (memcmp(x, y, upto_tlvs) != 0)
+		return false;
+
+	assert(x->tlvs && y->tlvs);
+	return memeq(
+	    x->tlvs->short_channel_id, tal_bytelen(x->tlvs->short_channel_id),
+	    y->tlvs->short_channel_id, tal_bytelen(y->tlvs->short_channel_id));
+}
+
+void run(const u8 *data, size_t size)
+{
+	test_decode_encode(data, size, WIRE_CHANNEL_READY,
+			   struct channel_ready);
+}