irc: Add contact information to nodes

The routing table now includes hostnames and ports for the node as well
as a helper to add/update the nodes we learn about.

daemon/routing.c

@@ -28,6 +28,7 @@ static bool node_eq(const struct node *n, const secp256k1_pubkey *key)
 {
 	return structeq(&n->id.pubkey, key);
 }
+
 HTABLE_DEFINE_TYPE(struct node, keyof_node, hash_key, node_eq, node_map);
 
 struct node_map *empty_node_map(struct lightningd_state *dstate)
@@ -69,6 +70,26 @@ struct node *new_node(struct lightningd_state *dstate,
 	return n;
 }
 
+struct node *add_node(
+	struct lightningd_state *dstate,
+	const struct pubkey *pk,
+	char *hostname,
+	int port)
+{
+	struct node *n = get_node(dstate, pk);
+	if (!n) {
+		n = new_node(dstate, pk);
+		log_debug_struct(dstate->base_log, "Creating new node %s",
+				 struct pubkey, pk);
+	} else {
+		log_debug_struct(dstate->base_log, "Update existing node %s",
+				 struct pubkey, pk);
+	}
+	n->hostname = tal_steal(n, hostname);
+	n->port = port;
+	return n;
+}
+
 static bool remove_conn_from_array(struct node_connection ***conns,
 				   struct node_connection *nc)
 {

daemon/routing.h

@@ -20,6 +20,11 @@ struct node_connection {
 
 struct node {
 	struct pubkey id;
+
+	/* IP/Hostname and port of this node */
+	char *hostname;
+	int port;
+
 	/* Routes connecting to us, from us. */
 	struct node_connection **in, **out;
 
@@ -46,6 +51,12 @@ struct node *get_node(struct lightningd_state *dstate,
  * If it returns more than msatoshi, it overflowed. */
 s64 connection_fee(const struct node_connection *c, u64 msatoshi);
 
+/* Updates existing node, or creates a new one as required. */
+struct node *add_node(struct lightningd_state *dstate,
+		      const struct pubkey *pk,
+		      char *hostname,
+		      int port);
+
 /* Updates existing connection, or creates new one as required. */
 struct node_connection *add_connection(struct lightningd_state *dstate,
 				       const struct pubkey *from,