From 13f7499864f93157a96c0946d09047704f11e074 Mon Sep 17 00:00:00 2001
From: Saverio Proto <zioproto@gmail.com>
Date: Sat, 28 Jun 2014 12:04:44 +0200
Subject: [PATCH] Skeleton design for opening a reliable channel

---
 src/meshlink.c          | 10 ++++++++++
 src/meshlink.h          |  9 +++++++++
 src/meshlink_internal.h |  7 +++++++
 3 files changed, 26 insertions(+)

diff --git a/src/meshlink.c b/src/meshlink.c
index e5982721..7d717e5a 100644
--- a/src/meshlink.c
+++ b/src/meshlink.c
@@ -1370,6 +1370,16 @@ void meshlink_blacklist(meshlink_handle_t *mesh, meshlink_node_t *node) {
 
 }
 
+meshlink_connection_t* meshlink_open_rchannel(meshlink_handle_t *mesh, meshlink_node_t *destination, uint16_t dport) {
+
+//TODO: check in mesh->socketsbitmap for a free descriptor and allocate a source port for this connection
+
+//TODO: register a callback for the data that will be received from this connection
+
+//TODO: return a description value that the user will use to write on this channel
+
+}
+
 static void __attribute__((constructor)) meshlink_init(void) {
 	crypto_init();
 }
diff --git a/src/meshlink.h b/src/meshlink.h
index 036637b0..96dcdf24 100644
--- a/src/meshlink.h
+++ b/src/meshlink.h
@@ -33,6 +33,8 @@ typedef struct meshlink_handle meshlink_handle_t;
 /// A handle for a MeshLink node.
 typedef struct meshlink_node meshlink_node_t;
 
+typedef struct meshlink_connection meshlink_connection_t;
+
 /// Code of most recent error encountered.
 typedef enum {
 	MESHLINK_OK,     ///< Everything is fine
@@ -52,6 +54,10 @@ struct meshlink_node {
 	void *priv;       ///< Private pointer which the application can set at will.
 };
 
+struct meshlink_connection {
+	uint16_t sd;
+};
+
 #endif // MESHLINK_INTERNAL_H
 
 /// Get the text for the given MeshLink error code.
@@ -308,6 +314,9 @@ extern bool meshlink_import(meshlink_handle_t *mesh, const char *data);
  */
 extern void meshlink_blacklist(meshlink_handle_t *mesh, meshlink_node_t *node);
 
+/// Open a channel to destination node for reliable data delivery
+extern meshlink_connection_t* meshlink_open_rchannel(meshlink_handle_t *mesh, meshlink_node_t *destination, uint16_t dport);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/meshlink_internal.h b/src/meshlink_internal.h
index 8700b94e..f625857d 100644
--- a/src/meshlink_internal.h
+++ b/src/meshlink_internal.h
@@ -55,6 +55,11 @@ typedef struct outpacketqueue {
 	unsigned int len;
 } outpacketqueue_t;
 
+struct meshlink_connection {
+	uint16_t sd;
+	outpacketqueue_t packetwindow;
+};
+
 /// A handle for an instance of MeshLink.
 struct meshlink_handle {
 	char *confbase;
@@ -85,6 +90,8 @@ struct meshlink_handle {
 
 	struct list_t *outpacketqueue;
 
+	uint16_t socketsbitmap; //bitmap of 16 bits
+
 	int contradicting_add_edge;
 	int contradicting_del_edge;
 	int sleeptime;
-- 
2.39.2