wireaddr: add wireaddr_eq.

We can't STRUCTEQ_DEF() it since addrlen is variable, so open-code it.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

common/wireaddr.c

@@ -17,6 +17,15 @@
 #include <unistd.h>
 #include <wire/wire.h>
 
+bool wireaddr_eq(const struct wireaddr *a, const struct wireaddr *b)
+{
+	if (a->type != b->type)
+		return false;
+	if (a->port != b->port)
+		return false;
+	return memeq(a->addr, a->addrlen, b->addr, b->addrlen);
+}
+
 /* Returns false if we didn't parse it, and *cursor == NULL if malformed. */
 bool fromwire_wireaddr(const u8 **cursor, size_t *max, struct wireaddr *addr)
 {

common/wireaddr.h

@@ -61,6 +61,8 @@ struct wireaddr {
 	u16 port;
 };
 
+bool wireaddr_eq(const struct wireaddr *a, const struct wireaddr *b);
+
 /* We use wireaddr to tell gossipd both what to listen on, and what to
  * announce */
 enum addr_listen_announce {