#include <stddef.h>
#include <unistd.h>
+#if defined(_WIN32)
+#include <Winsock2.h>
+#else
+#include <sys/types.h>
+#include <sys/socket.h>
+#endif
+
#ifdef __cplusplus
extern "C" {
#endif
/// The length in bytes of a signature made with meshlink_sign()
#define MESHLINK_SIGLEN (64)
+// The maximum length of fingerprints
+#define MESHLINK_FINGERPRINTLEN (64)
+
/// A handle for an instance of MeshLink.
typedef struct meshlink_handle meshlink_handle_t;
/// A handle for a MeshLink node.
typedef struct meshlink_node meshlink_node_t;
+/// A handle for a MeshLink edge.
+typedef struct meshlink_edge meshlink_edge_t;
+
/// A handle for a MeshLink channel.
typedef struct meshlink_channel meshlink_channel_t;
/// Code of most recent error encountered.
typedef enum {
MESHLINK_OK, ///< Everything is fine
+ MESHLINK_EINVAL, ///< Invalid parameter(s) to function call
MESHLINK_ENOMEM, ///< Out of memory
MESHLINK_ENOENT, ///< Node is not known
+ MESHLINK_EEXIST, ///< Node already exists
+ MESHLINK_EINTERNAL, ///< MeshLink internal error
+ MESHLINK_ERESOLV, ///< MeshLink could not resolve a hostname
+ MESHLINK_ESTORAGE, ///< MeshLink coud not load or write data from/to disk
+ MESHLINK_ENETWORK, ///< MeshLink encountered a network error
+ MESHLINK_EPEER, ///< A peer caused an error
} meshlink_errno_t;
+/// Device class
+typedef enum {
+ DEV_CLASS_BACKBONE = 0,
+ DEV_CLASS_STATIONARY = 1,
+ DEV_CLASS_PORTABLE = 2,
+ DEV_CLASS_UNKNOWN = 3,
+ _DEV_CLASS_MAX = 3
+} dev_class_t;
+
/// A variable holding the last encountered error from MeshLink.
/** This is a thread local variable that contains the error code of the most recent error
* encountered by a MeshLink API function called in the current thread.
#ifndef MESHLINK_INTERNAL_H
struct meshlink_handle {
+ char *name;
+ void *priv;
};
struct meshlink_node {
- const char *name; ///< Textual name of this node. It is stored in a nul-terminated C string, which is allocated by MeshLink.
+ char *name; ///< Textual name of this node. It is stored in a nul-terminated C string, which is allocated by MeshLink.
void *priv; ///< Private pointer which may be set freely by the application, and is never used or modified by MeshLink.
};
#endif // MESHLINK_INTERNAL_H
+/// An edge in the meshlink network.
+struct meshlink_edge {
+ struct meshlink_node *from; ///< Pointer to a node. Node memory is
+ // owned by meshlink and should not be
+ // deallocated. Node contents may be
+ // changed by meshlink.
+ struct meshlink_node *to; ///< Pointer to a node. Node memory is
+ // owned by meshlink and should not be
+ // deallocated. Node contents may be
+ // changed by meshlink.
+ struct sockaddr_storage address;///< The address information associated
+ // with this edge.
+ uint32_t options; ///< Edge options. @TODO what are edge options?
+ int weight; ///< Weight assigned to this edge.
+};
+
/// Get the text for the given MeshLink error code.
/** This function returns a pointer to the string containing the description of the given error code.
*
* After the function returns, the application is free to overwrite or free @a confbase @a.
* @param name The name which this instance of the application will use in the mesh.
* After the function returns, the application is free to overwrite or free @a name @a.
+ * @param appname The application name which will be used in the mesh.
+ * After the function returns, the application is free to overwrite or free @a name @a.
+ * @param devclass The device class which will be used in the mesh.
*
* @return A pointer to a meshlink_handle_t which represents this instance of MeshLink, or NULL in case of an error.
* The pointer is valid until meshlink_close() is called.
*/
-extern meshlink_handle_t *meshlink_open(const char *confbase, const char *name);
+extern meshlink_handle_t *meshlink_open(const char *confbase, const char *name, const char* appname, dev_class_t devclass);
+
+/// is used by the C++ wrapper to allocate more memory behind the handle
+extern meshlink_handle_t *meshlink_open_with_size(const char *confbase, const char *name, const char* appname, dev_class_t devclass, size_t size);
/// Start MeshLink.
/** This function causes MeshLink to open network sockets, make outgoing connections, and
} meshlink_log_level_t;
/// A callback for receiving log messages generated by MeshLink.
-/** @param mesh A handle which represents an instance of MeshLink.
+/** @param mesh A handle which represents an instance of MeshLink, or NULL.
* @param level An enum describing the severity level of the message.
* @param text A pointer to a nul-terminated C string containing the textual log message.
* This pointer is only valid for the duration of the callback.
/// Set the log callback.
/** This functions sets the callback that is called whenever MeshLink has some information to log.
- * The callback is run in MeshLink's own thread.
+ *
+ * The @a mesh @a parameter can either be a valid MeshLink handle, or NULL.
+ * In case it is NULL, the callback will be called for errors that happen outside the context of a valid mesh instance.
+ * Otherwise, it will be called for errors that happen in the context of the given mesh instance.
+ *
+ * If @a mesh @a is not NULL, then the callback is run in MeshLink's own thread.
* It is important that the callback uses apprioriate methods (queues, pipes, locking, etc.)
* to hand the data over to the application's thread.
* The callback should also not block itself and return as quickly as possible.
*
- * @param mesh A handle which represents an instance of MeshLink.
+ * The @a mesh @a parameter can either be a valid MeshLink handle, or NULL.
+ * In case it is NULL, the callback will be called for errors that happen outside the context of a valid mesh instance.
+ * Otherwise, it will be called for errors that happen in the context of the given mesh instance.
+ *
+ * @param mesh A handle which represents an instance of MeshLink, or NULL.
* @param level An enum describing the minimum severity level. Debugging information with a lower level will not trigger the callback.
* @param cb A pointer to the function which will be called when another node sends data to the local node.
* If a NULL pointer is given, the callback will be disabled.
*/
extern meshlink_node_t *meshlink_get_node(meshlink_handle_t *mesh, const char *name);
+/// Get the fingerprint of a node's public key.
+/** This function returns a fingerprint of the node's public key.
+ * It should be treated as an opaque blob.
+ *
+ * @param mesh A handle which represents an instance of MeshLink.
+ * @param node A pointer to a meshlink_node_t describing the node.
+ *
+ * @return A nul-terminated C string containing the fingerprint of the node's public key in a printable ASCII format.
+ * The application should call free() after it is done using this string.
+ */
+extern char *meshlink_get_fingerprint(meshlink_handle_t *mesh, meshlink_node_t *node);
+
/// Get a list of all nodes.
/** This function returns a list with handles for all known nodes.
*
* given hostname. The caller is free to overwrite or free
* this memory once meshlink returns.
*/
-extern void meshlink_hint_address(meshlink_handle_t *mesh, char *hostname, struct sockaddr *addr);
+extern void meshlink_hint_address(meshlink_handle_t *mesh, meshlink_node_t *node, const struct sockaddr *addr);
+
+/// Get a list of edges.
+/** This function returns an array with copies of all known bidirectional edges.
+ * The edges are copied to capture the mesh state at call time, since edges
+ * mutate frequently. The nodes pointed to within the meshlink_edge_t type
+ * are not copies; these are the same pointers that one would get from a call
+ * to meshlink_get_all_nodes().
+ *
+ * @param mesh A handle which represents an instance of MeshLink.
+ * @param edges A pointer to a previously allocated array of pointers to
+ * meshlink_edge_t, or NULL in which case MeshLink will
+ * allocate a new array. The application CANNOT supply an
+ * array it allocated itself with malloc, but CAN use
+ * the return value from the previous call to this function
+ * (which is the preferred way).
+ * The pointers in the array are valid until meshlink_close() is called.
+ * ATTENTION: The pointers and values should never be modified
+ * by the application!!!
+ * @param nmemb A pointer to a variable holding the number of nodes that
+ * are stored in the array. In case the @a nodes @a
+ * argument is not NULL, MeshLink might call realloc()
+ * on the array to change its size.
+ * The contents of this variable will be changed to reflect
+ * the new size of the array.
+ * @return A pointer to an array containing pointers to all known
+ * edges, or NULL in case of an error.
+ * If the @a edges @a argument was not NULL, then the
+ * retun value can be either the same value or a different
+ * value. If the new values is NULL, then the old array
+ * will have been freed by Meshlink.
+ * The caller must call free() on each element of this
+ * array (but not the contents of said elements),
+ * as well as the array itself when it is finished.
+ * ATTENTION: The pointers and values should never be modified
+ * by the application!!!
+ */
+extern meshlink_edge_t **meshlink_get_all_edges_state(meshlink_handle_t *mesh, meshlink_edge_t **edges, size_t *nmemb);
#ifdef __cplusplus
}