fuzz: target for init

Fuzz the decoding and encoding of init.

tests/fuzz/fuzz-wire-init.c

@@ -0,0 +1,50 @@
+#include "config.h"
+#include <assert.h>
+#include <ccan/mem/mem.h>
+#include <tests/fuzz/libfuzz.h>
+#include <tests/fuzz/wire.h>
+#include <wire/peer_wire.h>
+
+struct init {
+	u8 *globalfeatures;
+	u8 *features;
+	struct tlv_init_tlvs *tlvs;
+};
+
+static void *encode(const tal_t *ctx, const struct init *s)
+{
+	return towire_init(ctx, s->globalfeatures, s->features, s->tlvs);
+}
+
+static struct init *decode(const tal_t *ctx, const void *p)
+{
+	struct init *s = tal(ctx, struct init);
+
+	if (fromwire_init(s, p, &s->globalfeatures, &s->features, &s->tlvs))
+		return s;
+	return tal_free(s);
+}
+
+static bool equal(const struct init *x, const struct init *y)
+{
+	if (!memeq(x->globalfeatures, tal_bytelen(x->globalfeatures),
+		   y->globalfeatures, tal_bytelen(y->globalfeatures)))
+		return false;
+	if (!memeq(x->features, tal_bytelen(x->features), y->features,
+		   tal_bytelen(y->features)))
+		return false;
+
+	assert(x->tlvs && y->tlvs);
+
+	if (!memeq(x->tlvs->networks, tal_bytelen(x->tlvs->networks),
+		   y->tlvs->networks, tal_bytelen(y->tlvs->networks)))
+		return false;
+
+	return memeq(x->tlvs->remote_addr, tal_bytelen(x->tlvs->remote_addr),
+		     y->tlvs->remote_addr, tal_bytelen(y->tlvs->remote_addr));
+}
+
+void run(const u8 *data, size_t size)
+{
+	test_decode_encode(data, size, WIRE_INIT, struct init);
+}