From 88b24fcfccc5802db199d3fac2cec659ac48ca78 Mon Sep 17 00:00:00 2001
From: Guus Sliepen <guus@meshlink.io>
Date: Tue, 3 Aug 2021 01:09:45 +0200
Subject: [PATCH] Add meshlink_get_node_tiny().

This allows querying if a node is connected using the tiny MeshLink
version.
---
 src/meshlink++.h    | 12 ++++++++++++
 src/meshlink.c      | 19 +++++++++++++++++++
 src/meshlink.h      | 12 ++++++++++++
 src/meshlink.sym    |  1 +
 src/node.h          |  1 +
 src/protocol_auth.c |  1 +
 6 files changed, 46 insertions(+)

diff --git a/src/meshlink++.h b/src/meshlink++.h
index 25fd34f3..fd663992 100644
--- a/src/meshlink++.h
+++ b/src/meshlink++.h
@@ -449,6 +449,18 @@ public:
 		return meshlink_get_node_blacklisted(handle, node);
 	}
 
+	/// Get the node's tiny status.
+	/** This function returns true if the given node is a tiny node.
+	 *  Note that the tiny status of a node will only be known if the node has been reachable at least once.
+	 *
+	 *  @param node          A pointer to a meshlink::node describing the node.
+	 *
+	 *  @return              This function returns true if the node is a tiny node.
+	 */
+	bool get_node_tiny(node *node) {
+		return meshlink_get_node_tiny(handle, node);
+	}
+
 	/// Get a handle for a specific submesh.
 	/** This function returns a handle for the submesh with the given name.
 	 *
diff --git a/src/meshlink.c b/src/meshlink.c
index f153f757..71263b91 100644
--- a/src/meshlink.c
+++ b/src/meshlink.c
@@ -2562,6 +2562,25 @@ dev_class_t meshlink_get_node_dev_class(meshlink_handle_t *mesh, meshlink_node_t
 	return devclass;
 }
 
+bool meshlink_get_node_tiny(meshlink_handle_t *mesh, meshlink_node_t *node) {
+	if(!mesh || !node) {
+		meshlink_errno = MESHLINK_EINVAL;
+		return -1;
+	}
+
+	bool tiny;
+
+	if(pthread_mutex_lock(&mesh->mutex) != 0) {
+		abort();
+	}
+
+	tiny = ((node_t *)node)->status.tiny;
+
+	pthread_mutex_unlock(&mesh->mutex);
+
+	return tiny;
+}
+
 bool meshlink_get_node_blacklisted(meshlink_handle_t *mesh, meshlink_node_t *node) {
 	if(!mesh) {
 		meshlink_errno = MESHLINK_EINVAL;
diff --git a/src/meshlink.h b/src/meshlink.h
index a6c5b4b9..9a887168 100644
--- a/src/meshlink.h
+++ b/src/meshlink.h
@@ -835,6 +835,18 @@ struct meshlink_node **meshlink_get_all_nodes_by_blacklisted(struct meshlink_han
  */
 dev_class_t meshlink_get_node_dev_class(struct meshlink_handle *mesh, struct meshlink_node *node) __attribute__((__warn_unused_result__));
 
+/// Get the node's tiny status.
+/** This function returns true if the given node is a tiny node.
+ *  Note that the tiny status of a node will only be known if the node has been reachable at least once.
+ *
+ *  \memberof meshlink_node
+ *  @param mesh          A handle which represents an instance of MeshLink.
+ *  @param node          A pointer to a struct meshlink_node describing the node.
+ *
+ *  @return              This function returns true if the node is a tiny node.
+ */
+bool meshlink_get_node_tiny(struct meshlink_handle *mesh, struct meshlink_node *node) __attribute__((__warn_unused_result__));
+
 /// Get the node's blacklist status.
 /** This function returns the given node is blacklisted.
  *
diff --git a/src/meshlink.sym b/src/meshlink.sym
index 7c4de629..f598bcb6 100644
--- a/src/meshlink.sym
+++ b/src/meshlink.sym
@@ -51,6 +51,7 @@ meshlink_get_node_blacklisted
 meshlink_get_node_dev_class
 meshlink_get_node_reachability
 meshlink_get_node_submesh
+meshlink_get_node_tiny
 meshlink_get_pmtu
 meshlink_get_port
 meshlink_get_self
diff --git a/src/node.h b/src/node.h
index 63f3c2c8..f88cde68 100644
--- a/src/node.h
+++ b/src/node.h
@@ -38,6 +38,7 @@ typedef struct node_status_t {
 	uint16_t duplicate: 1;              /* 1 if the node is duplicate, ie. multiple nodes using the same Name are online */
 	uint16_t dirty: 1;                  /* 1 if the configuration of the node is dirty and needs to be written out */
 	uint16_t want_udp: 1;               /* 1 if we want working UDP because we have data to send */
+	uint16_t tiny: 1;                   /* 1 if this is a tiny node */
 } node_status_t;
 
 #define MAX_RECENT 5
diff --git a/src/protocol_auth.c b/src/protocol_auth.c
index 80332428..0a107e4c 100644
--- a/src/protocol_auth.c
+++ b/src/protocol_auth.c
@@ -380,6 +380,7 @@ bool ack_h(meshlink_handle_t *mesh, connection_t *c, const char *request) {
 
 	n->devclass = devclass;
 	n->status.dirty = true;
+	n->status.tiny = c->flags & PROTOCOL_TINY;
 
 	n->last_successfull_connection = mesh->loop.now.tv_sec;
 
-- 
2.39.2