fuzz: target for gossip_timestamp_filter

Fuzz the decoding and encoding of gossip_timestamp_filter.

tests/fuzz/fuzz-wire-gossip_timestamp_filter.c

@@ -0,0 +1,39 @@
+#include "config.h"
+#include <tests/fuzz/libfuzz.h>
+#include <tests/fuzz/wire.h>
+#include <wire/peer_wire.h>
+
+struct gossip_timestamp_filter {
+	struct bitcoin_blkid chain_hash;
+	u32 first_timestamp;
+	u32 timestamp_range;
+};
+
+static void *encode(const tal_t *ctx, const struct gossip_timestamp_filter *s)
+{
+	return towire_gossip_timestamp_filter(
+	    ctx, &s->chain_hash, s->first_timestamp, s->timestamp_range);
+}
+
+static struct gossip_timestamp_filter *decode(const tal_t *ctx, const void *p)
+{
+	struct gossip_timestamp_filter *s =
+	    tal(ctx, struct gossip_timestamp_filter);
+
+	if (fromwire_gossip_timestamp_filter(
+		p, &s->chain_hash, &s->first_timestamp, &s->timestamp_range))
+		return s;
+	return tal_free(s);
+}
+
+static bool equal(const struct gossip_timestamp_filter *x,
+		  const struct gossip_timestamp_filter *y)
+{
+	return memcmp(x, y, sizeof(*x)) == 0;
+}
+
+void run(const u8 *data, size_t size)
+{
+	test_decode_encode(data, size, WIRE_GOSSIP_TIMESTAMP_FILTER,
+			   struct gossip_timestamp_filter);
+}