+#ifndef MESHLINKPP_H
+#define MESHLINKPP_H
+
/*
meshlink++.h -- MeshLink C++ API
- Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>
+ Copyright (C) 2014, 2017 Guus Sliepen <guus@meshlink.io>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#ifndef MESHLINKPP_H
-#define MESHLINKPP_H
-
#include <meshlink.h>
+#include <new> // for 'placement new'
namespace meshlink {
- class mesh;
- class node;
- class channel;
+class mesh;
+class node;
+class channel;
+class submesh;
+
+/// Severity of log messages generated by MeshLink.
+typedef meshlink_log_level_t log_level_t;
+
+/// Code of most recent error encountered.
+typedef meshlink_errno_t errno_t;
+
+/// A callback for receiving data from the mesh.
+/** @param mesh A handle which represents an instance of MeshLink.
+ * @param source A pointer to a meshlink::node describing the source of the data.
+ * @param data A pointer to a buffer containing the data sent by the source.
+ * @param len The length of the received data.
+ */
+typedef void (*receive_cb_t)(mesh *mesh, node *source, const void *data, size_t len);
+
+/// A callback reporting the meta-connection attempt made by the host node to an another node.
+/** @param mesh A handle which represents an instance of MeshLink.
+ * @param node A pointer to a meshlink_node_t describing the node to whom meta-connection is being tried.
+ * This pointer is valid until meshlink_close() is called.
+ */
+typedef void (*connection_try_cb_t)(mesh *mesh, node *node);
+
+/// A callback reporting node status changes.
+/** @param mesh A handle which represents an instance of MeshLink.
+ * @param node A pointer to a meshlink::node describing the node whose status changed.
+ * @param reachable True if the node is reachable, false otherwise.
+ */
+typedef void (*node_status_cb_t)(mesh *mesh, node *node, bool reachable);
+
+/// A callback reporting node path MTU changes.
+/** @param mesh A handle which represents an instance of MeshLink.
+ * @param node A pointer to a meshlink_node_t describing the node whose status changed.
+ * This pointer is valid until meshlink_close() is called.
+ * @param pmtu The current path MTU to the node, or 0 if UDP communication is not (yet) possible.
+ */
+typedef void (*node_pmtu_cb_t)(mesh *mesh, node *node, uint16_t pmtu);
+
+/// A callback reporting duplicate node detection.
+/** @param mesh A handle which represents an instance of MeshLink.
+ * @param node A pointer to a meshlink_node_t describing the node which is duplicate.
+ * This pointer is valid until meshlink_close() is called.
+ */
+typedef void (*duplicate_cb_t)(mesh *mesh, node *node);
- /// Severity of log messages generated by MeshLink.
- typedef meshlink_log_level_t log_level_t;
+/// A callback for receiving log messages generated by MeshLink.
+/** @param mesh A handle which represents an instance of MeshLink.
+ * @param level An enum describing the severity level of the message.
+ * @param text A pointer to a string containing the textual log message.
+ */
+typedef void (*log_cb_t)(mesh *mesh, log_level_t level, const char *text);
- /// Code of most recent error encountered.
- typedef meshlink_errno_t errno_t;
+/// A callback for accepting incoming channels.
+/** @param mesh A handle which represents an instance of MeshLink.
+ * @param channel A handle for the incoming channel.
+ * @param port The port number the peer wishes to connect to.
+ * @param data A pointer to a buffer containing data already received. (Not yet used.)
+ * @param len The length of the data. (Not yet used.)
+ *
+ * @return This function should return true if the application accepts the incoming channel, false otherwise.
+ * If returning false, the channel is invalid and may not be used anymore.
+ */
+typedef bool (*channel_accept_cb_t)(mesh *mesh, channel *channel, uint16_t port, const void *data, size_t len);
- /// A callback for receiving data from the mesh.
- /** @param mesh A handle which represents an instance of MeshLink.
- * @param source A pointer to a meshlink::node describing the source of the data.
- * @param data A pointer to a buffer containing the data sent by the source.
- * @param len The length of the received data.
+/// A callback for receiving data from a channel.
+/** @param mesh A handle which represents an instance of MeshLink.
+ * @param channel A handle for the channel.
+ * @param data A pointer to a buffer containing data sent by the source.
+ * @param len The length of the data.
+ */
+typedef void (*channel_receive_cb_t)(mesh *mesh, channel *channel, const void *data, size_t len);
+
+/// A callback that is called when data can be send on a channel.
+/** @param mesh A handle which represents an instance of MeshLink.
+ * @param channel A handle for the channel.
+ * @param len The maximum length of data that is guaranteed to be accepted by a call to channel_send().
+ */
+typedef void (*channel_poll_cb_t)(mesh *mesh, channel *channel, size_t len);
+
+/// A callback for cleaning up buffers submitted for asynchronous I/O.
+/** This callbacks signals that MeshLink has finished using this buffer.
+ * The ownership of the buffer is now back into the application's hands.
+ *
+ * @param mesh A handle which represents an instance of MeshLink.
+ * @param channel A handle for the channel which used this buffer.
+ * @param data A pointer to a buffer containing the enqueued data.
+ * @param len The length of the buffer.
+ * @param priv A private pointer which was set by the application when submitting the buffer.
+ */
+typedef void (*aio_cb_t)(mesh *mesh, channel *channel, const void *data, size_t len, void *priv);
+
+/// A callback for asynchronous I/O to and from filedescriptors.
+/** This callbacks signals that MeshLink has finished using this filedescriptor.
+ *
+ * @param mesh A handle which represents an instance of MeshLink.
+ * @param channel A handle for the channel which used this filedescriptor.
+ * @param fd The filedescriptor that was used.
+ * @param len The length of the data that was successfully sent or received.
+ * @param priv A private pointer which was set by the application when submitting the buffer.
+ */
+typedef void (*aio_fd_cb_t)(mesh *mesh, channel *channel, int fd, size_t len, void *priv);
+
+/// A class describing a MeshLink node.
+class node: public meshlink_node_t {
+};
+
+/// A class describing a MeshLink Sub-Mesh.
+class submesh: public meshlink_submesh_t {
+};
+
+/// A class describing a MeshLink channel.
+class channel: public meshlink_channel_t {
+public:
+ static const uint32_t RELIABLE = MESHLINK_CHANNEL_RELIABLE;
+ static const uint32_t ORDERED = MESHLINK_CHANNEL_ORDERED;
+ static const uint32_t FRAMED = MESHLINK_CHANNEL_FRAMED;
+ static const uint32_t DROP_LATE = MESHLINK_CHANNEL_DROP_LATE;
+ static const uint32_t NO_PARTIAL = MESHLINK_CHANNEL_NO_PARTIAL;
+ static const uint32_t TCP = MESHLINK_CHANNEL_TCP;
+ static const uint32_t UDP = MESHLINK_CHANNEL_UDP;
+};
+
+/// A class describing a MeshLink mesh.
+class mesh {
+public:
+ mesh() : handle(0) {}
+
+ virtual ~mesh() {
+ this->close();
+ }
+
+ bool isOpen() const {
+ return (handle != 0);
+ }
+
+// TODO: please enable C++11 in autoconf to enable "move constructors":
+// mesh(mesh&& other)
+// : handle(other.handle)
+// {
+// if(handle)
+// handle->priv = this;
+// other.handle = 0;
+// }
+
+ /// Initialize MeshLink's configuration directory.
+ /** This function causes MeshLink to initialize its configuration directory,
+ * if it hasn't already been initialized.
+ * It only has to be run the first time the application starts,
+ * but it is not a problem if it is run more than once, as long as
+ * the arguments given are the same.
+ *
+ * This function does not start any network I/O yet. The application should
+ * first set callbacks, and then call meshlink_start().
+ *
+ * @param confbase The directory in which MeshLink will store its configuration files.
+ * @param name The name which this instance of the application will use in the mesh.
+ * @param appname The application name which will be used in the mesh.
+ * @param devclass The device class which will be used in the mesh.
+ *
+ * @return This function will return a pointer to a meshlink::mesh if MeshLink has successfully set up its configuration files, NULL otherwise.
*/
- typedef void (*receive_cb_t)(mesh *mesh, node *source, const void *data, size_t len);
+ bool open(const char *confbase, const char *name, const char *appname, dev_class_t devclass) {
+ handle = meshlink_open(confbase, name, appname, devclass);
+
+ if(handle) {
+ handle->priv = this;
+ }
+
+ return isOpen();
+ }
+
+ mesh(const char *confbase, const char *name, const char *appname, dev_class_t devclass) {
+ open(confbase, name, appname, devclass);
+ }
- /// A callback reporting node status changes.
- /** @param mesh A handle which represents an instance of MeshLink.
- * @param node A pointer to a meshlink::node describing the node whose status changed.
- * @param reachable True if the node is reachable, false otherwise.
+ /// Close the MeshLink handle.
+ /** This function calls meshlink_stop() if necessary,
+ * and frees all memory allocated by MeshLink.
+ * Afterwards, the handle and any pointers to a struct meshlink_node are invalid.
*/
- typedef void (*node_status_cb_t)(mesh *mesh, node *node, bool reachable);
+ void close() {
+ if(handle) {
+ handle->priv = 0;
+ meshlink_close(handle);
+ }
+
+ handle = 0;
+ }
- /// A callback for receiving log messages generated by MeshLink.
- /** @param mesh A handle which represents an instance of MeshLink.
- * @param level An enum describing the severity level of the message.
- * @param text A pointer to a string containing the textual log message.
+ /** instead of registerin callbacks you derive your own class and overwrite the following abstract member functions.
+ * These functions are run in MeshLink's own thread.
+ * It is therefore important that these functions use apprioriate methods (queues, pipes, locking, etc.)
+ * to hand the data over to the application's thread.
+ * These functions should also not block itself and return as quickly as possible.
+ * The default member functions are no-ops, so you are not required to overwrite all these member functions
*/
- typedef void (*log_cb_t)(mesh *mesh, log_level_t level, const char *text);
- /// A callback for accepting incoming channels.
- /** @param mesh A handle which represents an instance of MeshLink.
+ /// This function is called whenever another node sends data to the local node.
+ virtual void receive(node *source, const void *data, size_t length) {
+ /* do nothing */
+ (void)source;
+ (void)data;
+ (void) length;
+ }
+
+ /// This functions is called whenever another node's status changed.
+ virtual void node_status(node *peer, bool reachable) {
+ /* do nothing */
+ (void)peer;
+ (void)reachable;
+ }
+
+ /// This functions is called whenever another node's path MTU changes.
+ virtual void node_pmtu(node *peer, uint16_t pmtu) {
+ /* do nothing */
+ (void)peer;
+ (void)pmtu;
+ }
+
+ /// This functions is called whenever a duplicate node is detected.
+ virtual void node_duplicate(node *peer) {
+ /* do nothing */
+ (void)peer;
+ }
+
+ /// This functions is called whenever MeshLink has some information to log.
+ virtual void log(log_level_t level, const char *message) {
+ /* do nothing */
+ (void)level;
+ (void)message;
+ }
+
+ /// This functions is called whenever MeshLink has encountered a serious error.
+ virtual void error(meshlink_errno_t meshlink_errno) {
+ /* do nothing */
+ (void)meshlink_errno;
+ }
+
+ /// This functions is called whenever MeshLink a meta-connection attempt is made.
+ virtual void connection_try(node *peer) {
+ /* do nothing */
+ (void)peer;
+ }
+
+ /// This functions is called whenever another node attempts to open a channel to the local node.
+ /**
+ * If the channel is accepted, the poll_callback will be set to channel_poll and can be
+ * changed using set_channel_poll_cb(). Likewise, the receive callback is set to
+ * channel_receive().
+ *
+ * The function is run in MeshLink's own thread.
+ * It is therefore important that the callback uses apprioriate methods (queues, pipes, locking, etc.)
+ * to pass data to or from the application's thread.
+ * The callback should also not block itself and return as quickly as possible.
+ *
* @param channel A handle for the incoming channel.
- * @param node The node from which this channel is being initiated.
* @param port The port number the peer wishes to connect to.
* @param data A pointer to a buffer containing data already received. (Not yet used.)
* @param len The length of the data. (Not yet used.)
* @return This function should return true if the application accepts the incoming channel, false otherwise.
* If returning false, the channel is invalid and may not be used anymore.
*/
- typedef bool (*channel_accept_cb_t)(mesh *mesh, channel *channel, node *node, uint16_t port, const void *data, size_t len);
+ virtual bool channel_accept(channel *channel, uint16_t port, const void *data, size_t len) {
+ /* by default reject all channels */
+ (void)channel;
+ (void)port;
+ (void)data;
+ (void)len;
+ return false;
+ }
- /// A callback for receiving data from a channel.
- /** @param mesh A handle which represents an instance of MeshLink.
+ /// This function is called by Meshlink for receiving data from a channel.
+ /**
+ * The function is run in MeshLink's own thread.
+ * It is therefore important that the callback uses apprioriate methods (queues, pipes, locking, etc.)
+ * to pass data to or from the application's thread.
+ * The callback should also not block itself and return as quickly as possible.
+ *
* @param channel A handle for the channel.
* @param data A pointer to a buffer containing data sent by the source.
* @param len The length of the data.
*/
- typedef void (*channel_receive_cb_t)(mesh *mesh, channel *channel, const void *data, size_t len);
+ virtual void channel_receive(channel *channel, const void *data, size_t len) {
+ /* do nothing */
+ (void)channel;
+ (void)data;
+ (void)len;
+ }
- /// A class describing a MeshLink node.
- class node: public meshlink_node_t {
- };
+ /// This function is called by Meshlink when data can be send on a channel.
+ /**
+ * The function is run in MeshLink's own thread.
+ * It is therefore important that the callback uses apprioriate methods (queues, pipes, locking, etc.)
+ * to pass data to or from the application's thread.
+ *
+ * The callback should also not block itself and return as quickly as possible.
+ * @param channel A handle for the channel.
+ * @param len The maximum length of data that is guaranteed to be accepted by a call to channel_send().
+ */
+ virtual void channel_poll(channel *channel, size_t len) {
+ /* do nothing */
+ (void)channel;
+ (void)len;
+ }
+
+ /// Start MeshLink.
+ /** This function causes MeshLink to open network sockets, make outgoing connections, and
+ * create a new thread, which will handle all network I/O.
+ *
+ * @return This function will return true if MeshLink has successfully started its thread, false otherwise.
+ */
+ bool start() {
+ meshlink_set_receive_cb(handle, &receive_trampoline);
+ meshlink_set_node_status_cb(handle, &node_status_trampoline);
+ meshlink_set_node_pmtu_cb(handle, &node_pmtu_trampoline);
+ meshlink_set_node_duplicate_cb(handle, &node_duplicate_trampoline);
+ meshlink_set_log_cb(handle, MESHLINK_DEBUG, &log_trampoline);
+ meshlink_set_error_cb(handle, &error_trampoline);
+ meshlink_set_channel_accept_cb(handle, &channel_accept_trampoline);
+ meshlink_set_connection_try_cb(handle, &connection_try_trampoline);
+ return meshlink_start(handle);
+ }
+
+ /// Stop MeshLink.
+ /** This function causes MeshLink to disconnect from all other nodes,
+ * close all sockets, and shut down its own thread.
+ */
+ void stop() {
+ meshlink_stop(handle);
+ }
+
+ /// Send data to another node.
+ /** This functions sends one packet of data to another node in the mesh.
+ * The packet is sent using UDP semantics, which means that
+ * the packet is sent as one unit and is received as one unit,
+ * and that there is no guarantee that the packet will arrive at the destination.
+ * The application should take care of getting an acknowledgement and retransmission if necessary.
+ *
+ * @param destination A pointer to a meshlink::node describing the destination for the data.
+ * @param data A pointer to a buffer containing the data to be sent to the source.
+ * @param len The length of the data.
+ * @return This function will return true if MeshLink has queued the message for transmission, and false otherwise.
+ * A return value of true does not guarantee that the message will actually arrive at the destination.
+ */
+ bool send(node *destination, const void *data, unsigned int len) {
+ return meshlink_send(handle, destination, data, len);
+ }
+
+ /// Get a handle for a specific node.
+ /** This function returns a handle for the node with the given name.
+ *
+ * @param name The name of the node for which a handle is requested.
+ *
+ * @return A pointer to a meshlink::node which represents the requested node,
+ * or NULL if the requested node does not exist.
+ */
+ node *get_node(const char *name) {
+ return (node *)meshlink_get_node(handle, name);
+ }
+
+ /// Get a node's reachability status.
+ /** This function returns the current reachability of a given node, and the times of the last state changes.
+ * If a given state change never happened, the time returned will be 0.
+ *
+ * @param node A pointer to a meshlink::node describing the node.
+ * @param last_reachable A pointer to a time_t variable that will be filled in with the last time the node became reachable.
+ * @param last_unreachable A pointer to a time_t variable that will be filled in with the last time the node became unreachable.
+ *
+ * @return This function returns true if the node is currently reachable, false otherwise.
+ */
+ bool get_node_reachability(node *node, time_t *last_reachable = NULL, time_t *last_unreachable = NULL) {
+ return meshlink_get_node_reachability(handle, node, last_reachable, last_unreachable);
+ }
+
+ /// Get a handle for a specific submesh.
+ /** This function returns a handle for the submesh with the given name.
+ *
+ * @param name The name of the submesh for which a handle is requested.
+ *
+ * @return A pointer to a meshlink::submesh which represents the requested submesh,
+ * or NULL if the requested submesh does not exist.
+ */
+ submesh *get_submesh(const char *name) {
+ return (submesh *)meshlink_get_submesh(handle, name);
+ }
+
+ /// Get a handle for our own node.
+ /** This function returns a handle for the local node.
+ *
+ * @return A pointer to a meshlink::node which represents the local node.
+ */
+ node *get_self() {
+ return (node *)meshlink_get_self(handle);
+ }
+
+ /// Get a list of all nodes.
+ /** This function returns a list with handles for all known nodes.
+ *
+ * @param nodes A pointer to an array of pointers to meshlink::node, which should be allocated by the application.
+ * @param nmemb The maximum number of pointers that can be stored in the nodes array.
+ *
+ * @return The number of known nodes, or -1 in case of an error.
+ * This can be larger than nmemb, in which case not all nodes were stored in the nodes array.
+ */
+ node **get_all_nodes(node **nodes, size_t *nmemb) {
+ return (node **)meshlink_get_all_nodes(handle, (meshlink_node_t **)nodes, nmemb);
+ }
+
+ /// Sign data using the local node's MeshLink key.
+ /** This function signs data using the local node's MeshLink key.
+ * The generated signature can be securely verified by other nodes.
+ *
+ * @param data A pointer to a buffer containing the data to be signed.
+ * @param len The length of the data to be signed.
+ * @param signature A pointer to a buffer where the signature will be stored.
+ * @param siglen The size of the signature buffer. Will be changed after the call to match the size of the signature itself.
+ *
+ * @return This function returns true if the signature is valid, false otherwise.
+ */
+ bool sign(const void *data, size_t len, void *signature, size_t *siglen) {
+ return meshlink_sign(handle, data, len, signature, siglen);
+ }
+
+ /// Verify the signature generated by another node of a piece of data.
+ /** This function verifies the signature that another node generated for a piece of data.
+ *
+ * @param source A pointer to a meshlink_node_t describing the source of the signature.
+ * @param data A pointer to a buffer containing the data to be verified.
+ * @param len The length of the data to be verified.
+ * @param signature A pointer to a string containing the signature.
+ * @param siglen The size of the signature.
+ *
+ * @return This function returns true if the signature is valid, false otherwise.
+ */
+ bool verify(node *source, const void *data, size_t len, const void *signature, size_t siglen) {
+ return meshlink_verify(handle, source, data, len, signature, siglen);
+ }
+
+ /// Set the canonical Address for a node.
+ /** This function sets the canonical Address for a node.
+ * This address is stored permanently until it is changed by another call to this function,
+ * unlike other addresses associated with a node,
+ * such as those added with meshlink_hint_address() or addresses discovered at runtime.
+ *
+ * If a canonical Address is set for the local node,
+ * it will be used for the hostname part of generated invitation URLs.
+ *
+ * @param node A pointer to a meshlink_node_t describing the node.
+ * @param address A nul-terminated C string containing the address, which can be either in numeric format or a hostname.
+ * @param port A nul-terminated C string containing the port, which can be either in numeric or symbolic format.
+ * If it is NULL, the listening port's number will be used.
+ *
+ * @return This function returns true if the address was added, false otherwise.
+ */
+ bool set_canonical_address(node *node, const char *address, const char *port = NULL) {
+ return meshlink_set_canonical_address(handle, node, address, port);
+ }
+
+ /// Add an invitation address for the local node.
+ /** This function adds an address for the local node, which will be used only for invitation URLs.
+ * This address is not stored permanently.
+ * Multiple addresses can be added using multiple calls to this function.
+ *
+ * @param address A nul-terminated C string containing the address, which can be either in numeric format or a hostname.
+ * @param port A nul-terminated C string containing the port, which can be either in numeric or symbolic format.
+ * If it is NULL, the listening port's number will be used.
+ *
+ * @return This function returns true if the address was added, false otherwise.
+ */
+ bool add_invitation_address(const char *address, const char *port) {
+ return meshlink_add_invitation_address(handle, address, port);
+ }
+
+ /// Clears all invitation address for the local node.
+ /** This function removes all addresses added with meshlink_add_invitation_address().
+ */
+ void clear_invitation_addresses() {
+ return meshlink_clear_invitation_addresses(handle);
+ }
+
+ /// Add an Address for the local node.
+ /** This function adds an Address for the local node, which will be used for invitation URLs.
+ * @deprecated This function is deprecated, use set_canonical_address() and/or add_invitation_address().
+ *
+ * @param address A string containing the address, which can be either in numeric format or a hostname.
+ *
+ * @return This function returns true if the address was added, false otherwise.
+ */
+ bool add_address(const char *address) __attribute__((__deprecated__("use set_canonical_address() and/or add_invitation_address() instead"))) {
+ return meshlink_set_canonical_address(handle, get_self(), address, NULL);
+ }
+
+ /** This function performs tries to discover the local node's external address
+ * by contacting the meshlink.io server. If a reverse lookup of the address works,
+ * the FQDN associated with the address will be returned.
+ *
+ * Please note that this is function only returns a single address,
+ * even if the local node might have more than one external address.
+ * In that case, there is no control over which address will be selected.
+ * Also note that if you have a dynamic IP address, or are behind carrier-grade NAT,
+ * there is no guarantee that the external address will be valid for an extended period of time.
+ *
+ * This function is blocking. It can take several seconds before it returns.
+ * There is no guarantee it will be able to resolve the external address.
+ * Failures might be because by temporary network outages.
+ *
+ * @param family The address family to check, for example AF_INET or AF_INET6. If AF_UNSPEC is given,
+ * this might return the external address for any working address family.
+ *
+ * @return This function returns a pointer to a C string containing the discovered external address,
+ * or NULL if there was an error looking up the address.
+ * After get_external_address() returns, the application is free to overwrite or free this string.
+ */
+ bool get_external_address(int family = AF_UNSPEC) {
+ return meshlink_get_external_address_for_family(handle, family);
+ }
+
+ /** This function performs tries to discover the address of the local interface used for outgoing connection.
+ *
+ * Please note that this is function only returns a single address,
+ * even if the local node might have more than one external address.
+ * In that case, there is no control over which address will be selected.
+ * Also note that if you have a dynamic IP address, or are behind carrier-grade NAT,
+ * there is no guarantee that the external address will be valid for an extended period of time.
+ *
+ * This function will fail if it couldn't find a local address for the given address family.
+ * If hostname resolving is requested, this function may block for a few seconds.
+ *
+ * @param family The address family to check, for example AF_INET or AF_INET6. If AF_UNSPEC is given,
+ * this might return the external address for any working address family.
+ *
+ * @return This function returns a pointer to a C string containing the discovered external address,
+ * or NULL if there was an error looking up the address.
+ * After get_external_address() returns, the application is free to overwrite or free this string.
+ */
+ bool get_local_address(int family = AF_UNSPEC) {
+ return meshlink_get_local_address_for_family(handle, family);
+ }
+
+ /// Try to discover the external address for the local node, and add it to its list of addresses.
+ /** This function is equivalent to:
+ *
+ * mesh->add_address(mesh->get_external_address());
+ *
+ * Read the description of get_external_address() for the limitations of this function.
+ *
+ * @return This function returns true if the address was added, false otherwise.
+ */
+ bool add_external_address() {
+ return meshlink_add_external_address(handle);
+ }
+
+ /// Get the network port used by the local node.
+ /** This function returns the network port that the local node is listening on.
+ *
+ * @return This function returns the port number, or -1 in case of an error.
+ */
+ int get_port() {
+ return meshlink_get_port(handle);
+ }
+
+ /// Set the network port used by the local node.
+ /** This function sets the network port that the local node is listening on.
+ * It may only be called when the mesh is not running.
+ * If unsure, call stop() before calling this function.
+ * Also note that if your node is already part of a mesh with other nodes,
+ * that the other nodes may no longer be able to initiate connections to the local node,
+ * since they will try to connect to the previously configured port.
+ *
+ * @param port The port number to listen on. This must be between 0 and 65535.
+ * If the port is set to 0, then MeshLink will listen on a port
+ * that is randomly assigned by the operating system every time open() is called.
+ *
+ * @return This function returns true if the port was successfully changed
+ * to the desired port, false otherwise. If it returns false, there
+ * is no guarantee that MeshLink is listening on the old port.
+ */
+ bool set_port(int port) {
+ return meshlink_set_port(handle, port);
+ }
+
+ /// Set the timeout for invitations.
+ /** This function sets the timeout for invitations.
+ * The timeout is retroactively applied to all outstanding invitations.
+ *
+ * @param timeout The timeout for invitations in seconds.
+ */
+ void set_invitation_timeout(int timeout) {
+ meshlink_set_invitation_timeout(handle, timeout);
+ }
+
+ /// Invite another node into the mesh.
+ /** This function generates an invitation that can be used by another node to join the same mesh as the local node.
+ * The generated invitation is a string containing a URL.
+ * This URL should be passed by the application to the invitee in a way that no eavesdroppers can see the URL.
+ * The URL can only be used once, after the user has joined the mesh the URL is no longer valid.
+ *
+ * @param submesh A handle to the submesh to put the invitee in.
+ * @param name The name that the invitee will use in the mesh.
+ * @param flags A bitwise-or'd combination of flags that controls how the URL is generated.
+ *
+ * @return This function returns a string that contains the invitation URL.
+ * The application should call free() after it has finished using the URL.
+ */
+ char *invite(submesh *submesh, const char *name, uint32_t flags = 0) {
+ return meshlink_invite_ex(handle, submesh, name, flags);
+ }
+
+ /// Use an invitation to join a mesh.
+ /** This function allows the local node to join an existing mesh using an invitation URL generated by another node.
+ * An invitation can only be used if the local node has never connected to other nodes before.
+ * After a successfully accepted invitation, the name of the local node may have changed.
+ *
+ * This function may only be called on a mesh that has not been started yet and which is not already part of an existing mesh.
+ *
+ * This function is blocking. It can take several seconds before it returns.
+ * There is no guarantee it will perform a successful join.
+ * Failures might be caused by temporary network outages, or by the invitation having expired.
+ *
+ * @param invitation A string containing the invitation URL.
+ *
+ * @return This function returns true if the local node joined the mesh it was invited to, false otherwise.
+ */
+ bool join(const char *invitation) {
+ return meshlink_join(handle, invitation);
+ }
+
+ /// Export the local node's key and addresses.
+ /** This function generates a string that contains the local node's public key and one or more IP addresses.
+ * The application can pass it in some way to another node, which can then import it,
+ * granting the local node access to the other node's mesh.
+ *
+ * @return This function returns a string that contains the exported key and addresses.
+ * The application should call free() after it has finished using this string.
+ */
+ char *export_key() {
+ return meshlink_export(handle);
+ }
- /// A class describing a MeshLink channel.
- class channel: public meshlink_channel_t {
+ /// Import another node's key and addresses.
+ /** This function accepts a string containing the exported public key and addresses of another node.
+ * By importing this data, the local node grants the other node access to its mesh.
+ *
+ * @param data A string containing the other node's exported key and addresses.
+ *
+ * @return This function returns true if the data was valid and the other node has been granted access to the mesh, false otherwise.
+ */
+ bool import_key(const char *data) {
+ return meshlink_import(handle, data);
+ }
+
+ /// Forget any information about a node.
+ /** This function allows the local node to forget any information it has about a node,
+ * and if possible will remove any data it has stored on disk about the node.
+ *
+ * Any open channels to this node must be closed before calling this function.
+ *
+ * After this call returns, the node handle is invalid and may no longer be used, regardless
+ * of the return value of this call.
+ *
+ * Note that this function does not prevent MeshLink from actually forgetting about a node,
+ * or re-learning information about a node at a later point in time. It is merely a hint that
+ * the application does not care about this node anymore and that any resources kept could be
+ * cleaned up.
+ *
+ * \memberof meshlink_node
+ * @param node A pointer to a struct meshlink_node describing the node to be forgotten.
+ *
+ * @return This function returns true if all currently known data about the node has been forgotten, false otherwise.
+ */
+ bool forget_node(node *node) {
+ return meshlink_forget_node(handle, node);
+ }
+
+ /// Blacklist a node from the mesh.
+ /** This function causes the local node to blacklist another node.
+ * The local node will drop any existing connections to that node,
+ * and will not send data to it nor accept any data received from it any more.
+ *
+ * @param node A pointer to a meshlink::node describing the node to be blacklisted.
+ *
+ * @return This function returns true if the node has been whitelisted, false otherwise.
+ */
+ bool blacklist(node *node) {
+ return meshlink_blacklist(handle, node);
+ }
+
+ /// Blacklist a node from the mesh by name.
+ /** This function causes the local node to blacklist another node by name.
+ * The local node will drop any existing connections to that node,
+ * and will not send data to it nor accept any data received from it any more.
+ *
+ * If no node by the given name is known, it is created.
+ *
+ * @param name The name of the node to blacklist.
+ *
+ * @return This function returns true if the node has been blacklisted, false otherwise.
+ */
+ bool blacklist_by_name(const char *name) {
+ return meshlink_blacklist_by_name(handle, name);
+ }
+
+ /// Whitelist a node on the mesh.
+ /** This function causes the local node to whitelist another node.
+ * The local node will allow connections to and from that node,
+ * and will send data to it and accept any data received from it.
+ *
+ * @param node A pointer to a meshlink::node describing the node to be whitelisted.
+ *
+ * @return This function returns true if the node has been whitelisted, false otherwise.
+ */
+ bool whitelist(node *node) {
+ return meshlink_whitelist(handle, node);
+ }
+
+ /// Whitelist a node on the mesh by name.
+ /** This function causes the local node to whitelist a node by name.
+ * The local node will allow connections to and from that node,
+ * and will send data to it and accept any data received from it.
+ *
+ * If no node by the given name is known, it is created.
+ * This is useful if new nodes are blacklisted by default.
+ *
+ * \memberof meshlink_node
+ * @param node A pointer to a struct meshlink_node describing the node to be whitelisted.
+ *
+ * @return This function returns true if the node has been whitelisted, false otherwise.
+ */
+ bool whitelist_by_name(const char *name) {
+ return meshlink_whitelist_by_name(handle, name);
+ }
+
+ /// Set the poll callback.
+ /** This functions sets the callback that is called whenever data can be sent to another node.
+ * The callback is run in MeshLink's own thread.
+ * It is therefore important that the callback uses apprioriate methods (queues, pipes, locking, etc.)
+ * to pass data to or from the application's thread.
+ * The callback should also not block itself and return as quickly as possible.
+ *
+ * @param channel A handle for the channel.
+ * @param cb A pointer to the function which will be called when data can be sent to another node.
+ * If a NULL pointer is given, the callback will be disabled.
+ */
+ void set_channel_poll_cb(channel *channel, channel_poll_cb_t cb) {
+ meshlink_set_channel_poll_cb(handle, channel, (meshlink_channel_poll_cb_t)cb);
+ }
+
+ /// Set the send buffer size of a channel.
+ /** This function sets the desired size of the send buffer.
+ * The default size is 128 kB.
+ *
+ * @param channel A handle for the channel.
+ * @param size The desired size for the send buffer.
+ * If a NULL pointer is given, the callback will be disabled.
+ */
+ void set_channel_sndbuf(channel *channel, size_t size) {
+ meshlink_set_channel_sndbuf(handle, channel, size);
+ }
+
+ /// Set the receive buffer size of a channel.
+ /** This function sets the desired size of the receive buffer.
+ * The default size is 128 kB.
+ *
+ * @param channel A handle for the channel.
+ * @param size The desired size for the send buffer.
+ * If a NULL pointer is given, the callback will be disabled.
+ */
+ void set_channel_rcvbuf(channel *channel, size_t size) {
+ meshlink_set_channel_rcvbuf(handle, channel, size);
+ }
+
+ /// Set the connection timeout used for channels to the given node.
+ /** This sets the timeout after which unresponsive channels will be reported as closed.
+ * The timeout is set for all current and future channels to the given node.
+ *
+ * @param channel A handle for the channel.
+ * @param timeout The timeout in seconds after which unresponsive channels will be reported as closed.
+ * The default is 60 seconds.
+ */
+ void set_node_channel_timeout(node *node, int timeout) {
+ meshlink_set_node_channel_timeout(handle, node, timeout);
+ }
+
+ /// Open a reliable stream channel to another node.
+ /** This function is called whenever a remote node wants to open a channel to the local node.
+ * The application then has to decide whether to accept or reject this channel.
+ *
+ * This function sets the channel poll callback to channel_poll_trampoline, which in turn
+ * calls channel_poll. To set a different, channel-specific poll callback, use set_channel_poll_cb.
+ *
+ * @param node The node to which this channel is being initiated.
+ * @param port The port number the peer wishes to connect to.
+ * @param cb A pointer to the function which will be called when the remote node sends data to the local node.
+ * @param data A pointer to a buffer containing data to already queue for sending.
+ * @param len The length of the data.
+ * If len is 0, the data pointer is copied into the channel's priv member.
+ * @param flags A bitwise-or'd combination of flags that set the semantics for this channel.
+ *
+ * @return A handle for the channel, or NULL in case of an error.
+ */
+ channel *channel_open(node *node, uint16_t port, channel_receive_cb_t cb, const void *data, size_t len, uint32_t flags = channel::TCP) {
+ channel *ch = (channel *)meshlink_channel_open_ex(handle, node, port, (meshlink_channel_receive_cb_t)cb, data, len, flags);
+ meshlink_set_channel_poll_cb(handle, ch, &channel_poll_trampoline);
+ return ch;
+ }
+
+ /// Open a reliable stream channel to another node.
+ /** This function is called whenever a remote node wants to open a channel to the local node.
+ * The application then has to decide whether to accept or reject this channel.
+ *
+ * This function sets the channel receive callback to channel_receive_trampoline,
+ * which in turn calls channel_receive.
+ *
+ * This function sets the channel poll callback to channel_poll_trampoline, which in turn
+ * calls channel_poll. To set a different, channel-specific poll callback, use set_channel_poll_cb.
+ *
+ * @param node The node to which this channel is being initiated.
+ * @param port The port number the peer wishes to connect to.
+ * @param data A pointer to a buffer containing data to already queue for sending.
+ * @param len The length of the data.
+ * If len is 0, the data pointer is copied into the channel's priv member.
+ * @param flags A bitwise-or'd combination of flags that set the semantics for this channel.
+ *
+ * @return A handle for the channel, or NULL in case of an error.
+ */
+ channel *channel_open(node *node, uint16_t port, const void *data, size_t len, uint32_t flags = channel::TCP) {
+ channel *ch = (channel *)meshlink_channel_open_ex(handle, node, port, &channel_receive_trampoline, data, len, flags);
+ meshlink_set_channel_poll_cb(handle, ch, &channel_poll_trampoline);
+ return ch;
+ }
+
+ /// Partially close a reliable stream channel.
+ /** This shuts down the read or write side of a channel, or both, without closing the handle.
+ * It can be used to inform the remote node that the local node has finished sending all data on the channel,
+ * but still allows waiting for incoming data from the remote node.
+ *
+ * @param channel A handle for the channel.
+ * @param direction Must be one of SHUT_RD, SHUT_WR or SHUT_RDWR.
+ */
+ void channel_shutdown(channel *channel, int direction) {
+ return meshlink_channel_shutdown(handle, channel, direction);
+ }
+
+ /// Close a reliable stream channel.
+ /** This informs the remote node that the local node has finished sending all data on the channel.
+ * It also causes the local node to stop accepting incoming data from the remote node.
+ * Afterwards, the channel handle is invalid and must not be used any more.
+ *
+ * @param channel A handle for the channel.
+ */
+ void channel_close(meshlink_channel_t *channel) {
+ return meshlink_channel_close(handle, channel);
+ }
+
+ /// Transmit data on a channel
+ /** This queues data to send to the remote node.
+ *
+ * @param channel A handle for the channel.
+ * @param data A pointer to a buffer containing data sent by the source.
+ * @param len The length of the data.
+ *
+ * @return The amount of data that was queued, which can be less than len, or a negative value in case of an error.
+ * If MESHLINK_CHANNEL_NO_PARTIAL is set, then the result will either be len,
+ * 0 if the buffer is currently too full, or -1 if len is too big even for an empty buffer.
+ */
+ ssize_t channel_send(channel *channel, void *data, size_t len) {
+ return meshlink_channel_send(handle, channel, data, len);
+ }
+
+ /// Transmit data on a channel asynchronously
+ /** This registers a buffer that will be used to send data to the remote node.
+ * Multiple buffers can be registered, in which case data will be sent in the order the buffers were registered.
+ * While there are still buffers with unsent data, the poll callback will not be called.
+ *
+ * @param channel A handle for the channel.
+ * @param data A pointer to a buffer containing data sent by the source, or NULL if there is no data to send.
+ * After meshlink_channel_aio_send() returns, the buffer may not be modified or freed by the application
+ * until the callback routine is called.
+ * @param len The length of the data, or 0 if there is no data to send.
+ * @param cb A pointer to the function which will be called when MeshLink has finished using the buffer.
+ * @param priv A private pointer which was set by the application when submitting the buffer.
+ *
+ * @return True if the buffer was enqueued, false otherwise.
+ */
+ bool channel_aio_send(channel *channel, const void *data, size_t len, meshlink_aio_cb_t cb, void *priv) {
+ return meshlink_channel_aio_send(handle, channel, data, len, cb, priv);
+ }
+
+ /// Transmit data on a channel asynchronously from a filedescriptor
+ /** This will read up to the specified length number of bytes from the given filedescriptor, and send it over the channel.
+ * The callback may be returned early if there is an error reading from the filedescriptor.
+ * While there is still with unsent data, the poll callback will not be called.
+ *
+ * @param channel A handle for the channel.
+ * @param fd A file descriptor from which data will be read.
+ * @param len The length of the data, or 0 if there is no data to send.
+ * @param cb A pointer to the function which will be called when MeshLink has finished using the filedescriptor.
+ * @param priv A private pointer which was set by the application when submitting the buffer.
+ *
+ * @return True if the buffer was enqueued, false otherwise.
+ */
+ bool channel_aio_fd_send(channel *channel, int fd, size_t len, meshlink_aio_fd_cb_t cb, void *priv) {
+ return meshlink_channel_aio_fd_send(handle, channel, fd, len, cb, priv);
+ }
+
+ /// Receive data on a channel asynchronously
+ /** This registers a buffer that will be filled with incoming channel data.
+ * Multiple buffers can be registered, in which case data will be received in the order the buffers were registered.
+ * While there are still buffers that have not been filled, the receive callback will not be called.
+ *
+ * @param channel A handle for the channel.
+ * @param data A pointer to a buffer that will be filled with incoming data.
+ * After meshlink_channel_aio_receive() returns, the buffer may not be modified or freed by the application
+ * until the callback routine is called.
+ * @param len The length of the data.
+ * @param cb A pointer to the function which will be called when MeshLink has finished using the buffer.
+ * @param priv A private pointer which was set by the application when submitting the buffer.
+ *
+ * @return True if the buffer was enqueued, false otherwise.
+ */
+ bool channel_aio_receive(channel *channel, const void *data, size_t len, meshlink_aio_cb_t cb, void *priv) {
+ return meshlink_channel_aio_receive(handle, channel, data, len, cb, priv);
+ }
+
+ /// Receive data on a channel asynchronously and send it to a filedescriptor
+ /** This will read up to the specified length number of bytes from the channel, and send it to the filedescriptor.
+ * The callback may be returned early if there is an error writing to the filedescriptor.
+ * While there is still unread data, the receive callback will not be called.
+ *
+ * @param channel A handle for the channel.
+ * @param fd A file descriptor to which data will be written.
+ * @param len The length of the data.
+ * @param cb A pointer to the function which will be called when MeshLink has finished using the filedescriptor.
+ * @param priv A private pointer which was set by the application when submitting the buffer.
+ *
+ * @return True if the buffer was enqueued, false otherwise.
+ */
+ bool channel_aio_fd_receive(channel *channel, int fd, size_t len, meshlink_aio_fd_cb_t cb, void *priv) {
+ return meshlink_channel_aio_fd_receive(handle, channel, fd, len, cb, priv);
+ }
+
+ /// Get the amount of bytes in the send buffer.
+ /** This returns the amount of bytes in the send buffer.
+ * These bytes have not been received by the peer yet.
+ *
+ * @param channel A handle for the channel.
+ *
+ * @return The amount of un-ACKed bytes in the send buffer.
+ */
+ size_t channel_get_sendq(channel *channel) {
+ return meshlink_channel_get_sendq(handle, channel);
+ }
+
+ /// Get the amount of bytes in the receive buffer.
+ /** This returns the amount of bytes in the receive buffer.
+ * These bytes have not been processed by the application yet.
+ *
+ * @param channel A handle for the channel.
+ *
+ * @return The amount of bytes in the receive buffer.
+ */
+ size_t channel_get_recvq(channel *channel) {
+ return meshlink_channel_get_recvq(handle, channel);
+ }
+
+ /// Get the maximum segment size of a channel.
+ /** This returns the amount of bytes that can be sent at once for channels with UDP semantics.
+ *
+ * @param channel A handle for the channel.
+ *
+ * @return The amount of bytes in the receive buffer.
+ */
+ size_t channel_get_mss(channel *channel) {
+ return meshlink_channel_get_mss(handle, channel);
};
- /// A class describing a MeshLink mesh.
- class mesh: public meshlink_handle_t {
- public:
- // TODO: delete constructor, add a destructor.
-
- /// Start MeshLink.
- /** This function causes MeshLink to open network sockets, make outgoing connections, and
- * create a new thread, which will handle all network I/O.
- *
- * @return This function will return true if MeshLink has succesfully started its thread, false otherwise.
- */
- bool start() {
- return meshlink_start(this);
- }
+ /// Enable or disable zeroconf discovery of local peers
+ /** This controls whether zeroconf discovery using the Catta library will be
+ * enabled to search for peers on the local network. By default, it is enabled.
+ *
+ * @param enable Set to true to enable discovery, false to disable.
+ */
+ void enable_discovery(bool enable = true) {
+ meshlink_enable_discovery(handle, enable);
+ }
- /// Stop MeshLink.
- /** This function causes MeshLink to disconnect from all other nodes,
- * close all sockets, and shut down its own thread.
- */
- void stop() {
- meshlink_stop(this);
- }
+ /// Set device class timeouts
+ /** This sets the ping interval and timeout for a given device class.
+ *
+ * @param devclass The device class to update
+ * @param pinginterval The interval between keepalive packets, in seconds. The default is 60.
+ * @param pingtimeout The required time within which a peer should respond, in seconds. The default is 5.
+ * The timeout must be smaller than the interval.
+ */
+ void set_dev_class_timeouts(dev_class_t devclass, int pinginterval, int pingtimeout) {
+ meshlink_set_dev_class_timeouts(handle, devclass, pinginterval, pingtimeout);
+ }
- /// Set the receive callback.
- /** This functions sets the callback that is called whenever another node sends data to the local node.
- * The callback is run in MeshLink's own thread.
- * It is therefore 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 cb A pointer to the function which will be called when another node sends data to the local node.
- */
- void set_receive_cb(receive_cb_t cb) {
- meshlink_set_receive_cb(this, (meshlink_receive_cb_t)cb);
- }
+ /// Set device class fast retry period
+ /** This sets the fast retry period for a given device class.
+ * During this period after the last time the mesh becomes unreachable, connections are tried once a second.
+ *
+ * @param devclass The device class to update
+ * @param fast_retry_period The period during which fast connection retries are done. The default is 0.
+ */
+ void set_dev_class_fast_retry_period(dev_class_t devclass, int fast_retry_period) {
+ meshlink_set_dev_class_fast_retry_period(handle, devclass, fast_retry_period);
+ }
- /// Set the node status callback.
- /** This functions sets the callback that is called whenever another node's status changed.
- * The callback is run in MeshLink's own thread.
- * It is therefore 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 cb A pointer to the function which will be called when another node's status changes.
- */
- void set_node_status_cb(node_status_cb_t cb) {
- meshlink_set_node_status_cb(this, (meshlink_node_status_cb_t)cb);
- }
+ /// Set which order invitations are committed
+ /** This determines in which order configuration files are written to disk during an invitation.
+ * By default, the invitee saves the configuration to disk first, then the inviter.
+ * By calling this function with @a inviter_commits_first set to true, the order is reversed.
+ *
+ * @param inviter_commits_first If true, then the node that invited a peer will commit data to disk first.
+ */
+ void set_inviter_commits_first(bool inviter_commits_first) {
+ meshlink_set_inviter_commits_first(handle, inviter_commits_first);
+ }
- /// 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.
- * 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 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.
- */
- void set_log_cb(meshlink_log_level_t level, log_cb_t cb) {
- meshlink_set_log_cb(this, level, (meshlink_log_cb_t)cb);
- }
+ /// Set the URL used to discover the host's external address
+ /** For generating invitation URLs, MeshLink can look up the externally visible address of the local node.
+ * It does so by querying an external service. By default, this is http://meshlink.io/host.cgi.
+ * Only URLs starting with http:// are supported.
+ *
+ * @param url The URL to use for external address queries, or NULL to revert back to the default URL.
+ */
+ void set_external_address_discovery_url(const char *url) {
+ meshlink_set_external_address_discovery_url(handle, url);
+ }
- /// Send data to another node.
- /** This functions sends one packet of data to another node in the mesh.
- * The packet is sent using UDP semantics, which means that
- * the packet is sent as one unit and is received as one unit,
- * and that there is no guarantee that the packet will arrive at the destination.
- * The application should take care of getting an acknowledgement and retransmission if necessary.
- *
- * @param destination A pointer to a meshlink::node describing the destination for the data.
- * @param data A pointer to a buffer containing the data to be sent to the source.
- * @param len The length of the data.
- * @return This function will return true if MeshLink has queued the message for transmission, and false otherwise.
- * A return value of true does not guarantee that the message will actually arrive at the destination.
- */
- bool send(node *destination, const void *data, unsigned int len) {
- return meshlink_send(this, destination, data, len);
- }
+private:
+ // non-copyable:
+ mesh(const mesh &) /* TODO: C++11: = delete */;
+ void operator=(const mesh &) /* TODO: C++11: = delete */;
- /// Get a handle for a specific node.
- /** This function returns a handle for the node with the given name.
- *
- * @param name The name of the node for which a handle is requested.
- *
- * @return A pointer to a meshlink::node which represents the requested node,
- * or NULL if the requested node does not exist.
- */
- node *get_node(const char *name) {
- return (node *)meshlink_get_node(this, name);
+ /// static callback trampolines:
+ static void receive_trampoline(meshlink_handle_t *handle, meshlink_node_t *source, const void *data, size_t length) {
+ if(!(handle->priv)) {
+ return;
}
- /// Get a list of all nodes.
- /** This function returns a list with handles for all known nodes.
- *
- * @param nodes A pointer to an array of pointers to meshlink::node, which should be allocated by the application.
- * @param nmemb The maximum number of pointers that can be stored in the nodes array.
- *
- * @return The number of known nodes, or -1 in case of an error.
- * This can be larger than nmemb, in which case not all nodes were stored in the nodes array.
- */
- node **get_all_nodes(node **nodes, size_t *nmemb) {
- return (node **)meshlink_get_all_nodes(this, (meshlink_node_t **)nodes, nmemb);
- }
+ meshlink::mesh *that = static_cast<mesh *>(handle->priv);
+ that->receive(static_cast<node *>(source), data, length);
+ }
- /// Sign data using the local node's MeshLink key.
- /** This function signs data using the local node's MeshLink key.
- * The generated signature can be securely verified by other nodes.
- *
- * @param data A pointer to a buffer containing the data to be signed.
- * @param len The length of the data to be signed.
- * @param signature A pointer to a buffer where the signature will be stored.
- * @param siglen The size of the signature buffer. Will be changed after the call to match the size of the signature itself.
- *
- * @return This function returns true if the signature is valid, false otherwise.
- */
- bool sign(const void *data, size_t len, void *signature, size_t *siglen) {
- return meshlink_sign(this, data, len, signature, siglen);
+ static void node_status_trampoline(meshlink_handle_t *handle, meshlink_node_t *peer, bool reachable) {
+ if(!(handle->priv)) {
+ return;
}
- /// Verify the signature generated by another node of a piece of data.
- /** This function verifies the signature that another node generated for a piece of data.
- *
- * @param source A pointer to a meshlink_node_t describing the source of the signature.
- * @param data A pointer to a buffer containing the data to be verified.
- * @param len The length of the data to be verified.
- * @param signature A pointer to a string containing the signature.
- * @param siglen The size of the signature.
- *
- * @return This function returns true if the signature is valid, false otherwise.
- */
- bool verify(node *source, const void *data, size_t len, const void *signature, size_t siglen) {
- return meshlink_verify(this, source, data, len, signature, siglen);
- }
+ meshlink::mesh *that = static_cast<mesh *>(handle->priv);
+ that->node_status(static_cast<node *>(peer), reachable);
+ }
- /// Add an Address for the local node.
- /** This function adds an Address for the local node, which will be used for invitation URLs.
- *
- * @param address A string containing the address, which can be either in numeric format or a hostname.
- *
- * @return This function returns true if the address was added, false otherwise.
- */
- bool add_address(const char *address) {
- return meshlink_add_address(this, address);
+ static void node_pmtu_trampoline(meshlink_handle_t *handle, meshlink_node_t *peer, uint16_t pmtu) {
+ if(!(handle->priv)) {
+ return;
}
- /// Invite another node into the mesh.
- /** This function generates an invitation that can be used by another node to join the same mesh as the local node.
- * The generated invitation is a string containing a URL.
- * This URL should be passed by the application to the invitee in a way that no eavesdroppers can see the URL.
- * The URL can only be used once, after the user has joined the mesh the URL is no longer valid.
- *
- * @param name The name that the invitee will use in the mesh.
- *
- * @return This function returns a string that contains the invitation URL.
- * The application should call free() after it has finished using the URL.
- */
- char *invite(const char *name) {
- return meshlink_invite(this, name);
- }
+ meshlink::mesh *that = static_cast<mesh *>(handle->priv);
+ that->node_pmtu(static_cast<node *>(peer), pmtu);
+ }
- /// Use an invitation to join a mesh.
- /** This function allows the local node to join an existing mesh using an invitation URL generated by another node.
- * An invitation can only be used if the local node has never connected to other nodes before.
- * After a succesfully accepted invitation, the name of the local node may have changed.
- *
- * @param invitation A string containing the invitation URL.
- *
- * @return This function returns true if the local node joined the mesh it was invited to, false otherwise.
- */
- bool join(const char *invitation) {
- return meshlink_join(this, invitation);
+ static void node_duplicate_trampoline(meshlink_handle_t *handle, meshlink_node_t *peer) {
+ if(!(handle->priv)) {
+ return;
}
- /// Export the local node's key and addresses.
- /** This function generates a string that contains the local node's public key and one or more IP addresses.
- * The application can pass it in some way to another node, which can then import it,
- * granting the local node access to the other node's mesh.
- *
- * @return This function returns a string that contains the exported key and addresses.
- * The application should call free() after it has finished using this string.
- */
- char *export_key() {
- return meshlink_export(this);
- }
+ meshlink::mesh *that = static_cast<mesh *>(handle->priv);
+ that->node_duplicate(static_cast<node *>(peer));
+ }
- /// Import another node's key and addresses.
- /** This function accepts a string containing the exported public key and addresses of another node.
- * By importing this data, the local node grants the other node access to its mesh.
- *
- * @param data A string containing the other node's exported key and addresses.
- *
- * @return This function returns true if the data was valid and the other node has been granted access to the mesh, false otherwise.
- */
- bool import_key(const char *data) {
- return meshlink_import(this, data);
+ static void log_trampoline(meshlink_handle_t *handle, log_level_t level, const char *message) {
+ if(!(handle->priv)) {
+ return;
}
- /// Blacklist a node from the mesh.
- /** This function causes the local node to blacklist another node.
- * The local node will drop any existing connections to that node,
- * and will not send data to it nor accept any data received from it any more.
- *
- * @param node A pointer to a meshlink::node describing the node to be blacklisted.
- */
- void blacklist(node *node) {
- return meshlink_blacklist(this, node);
- }
+ meshlink::mesh *that = static_cast<mesh *>(handle->priv);
+ that->log(level, message);
+ }
- /// Set the accept callback.
- /** This functions sets the callback that is called whenever another node sends data to the local node.
- * The callback is run in MeshLink's own thread.
- * It is therefore 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 channel A handle for the channel.
- * @param cb A pointer to the function which will be called when another node sends data to the local node.
- */
- void set_channel_accept_cb(channel *channel, channel_accept_cb_t cb) {
- return meshlink_set_channel_accept_cb(this, (meshlink_channel_accept_cb_t)cb);
+ static void error_trampoline(meshlink_handle_t *handle, meshlink_errno_t meshlink_errno) {
+ if(!(handle->priv)) {
+ return;
}
- /// Open a reliable stream channel to another node.
- /** This function is called whenever a remote node wants to open a channel to the local node.
- * The application then has to decide whether to accept or reject this channel.
- *
- * @param node The node to which this channel is being initiated.
- * @param port The port number the peer wishes to connect to.
- * @param cb A pointer to the function which will be called when the remote node sends data to the local node.
- * @param data A pointer to a buffer containing data to already queue for sending.
- * @param len The length of the data.
- *
- * @return A handle for the channel, or NULL in case of an error.
- */
- channel *channel_open(node *node, uint16_t port, channel_receive_cb_t cb, const void *data, size_t len) {
- return (channel *)meshlink_channel_open(this, node, port, (meshlink_channel_receive_cb_t)cb, data, len);
- }
+ meshlink::mesh *that = static_cast<mesh *>(handle->priv);
+ that->error(meshlink_errno);
+ }
- /// Partially close a reliable stream channel.
- /** This shuts down the read or write side of a channel, or both, without closing the handle.
- * It can be used to inform the remote node that the local node has finished sending all data on the channel,
- * but still allows waiting for incoming data from the remote node.
- *
- * @param channel A handle for the channel.
- * @param direction Must be one of SHUT_RD, SHUT_WR or SHUT_RDWR.
- */
- void channel_shutdown(channel *channel, int direction) {
- return meshlink_channel_shutdown(this, channel, direction);
+ static void connection_try_trampoline(meshlink_handle_t *handle, meshlink_node_t *peer) {
+ if(!(handle->priv)) {
+ return;
}
- /// Close a reliable stream channel.
- /** This informs the remote node that the local node has finished sending all data on the channel.
- * It also causes the local node to stop accepting incoming data from the remote node.
- * Afterwards, the channel handle is invalid and must not be used any more.
- *
- * @param channel A handle for the channel.
- */
- void channel_close(meshlink_channel_t *channel) {
- return meshlink_channel_close(this, channel);
- }
+ meshlink::mesh *that = static_cast<mesh *>(handle->priv);
+ that->connection_try(static_cast<node *>(peer));
+ }
- /// Transmit data on a channel
- /** This queues data to send to the remote node.
- *
- * @param channel A handle for the channel.
- * @param data A pointer to a buffer containing data sent by the source.
- * @param len The length of the data.
- *
- * @return The amount of data that was queued, which can be less than len, or a negative value in case of an error.
- */
- ssize_t channel_send(channel *channel, void *data, size_t len) {
- return meshlink_channel_send(this, channel, data, len);
+ static bool channel_accept_trampoline(meshlink_handle_t *handle, meshlink_channel *channel, uint16_t port, const void *data, size_t len) {
+ if(!(handle->priv)) {
+ return false;
}
- };
+ meshlink::mesh *that = static_cast<mesh *>(handle->priv);
+ bool accepted = that->channel_accept(static_cast<meshlink::channel *>(channel), port, data, len);
- /// Initialize MeshLink's configuration directory.
- /** This function causes MeshLink to initialize its configuration directory,
- * if it hasn't already been initialized.
- * It only has to be run the first time the application starts,
- * but it is not a problem if it is run more than once, as long as
- * the arguments given are the same.
- *
- * This function does not start any network I/O yet. The application should
- * first set callbacks, and then call meshlink_start().
- *
- * @param confbase The directory in which MeshLink will store its configuration files.
- * @param name The name which this instance of the application will use in the mesh.
- * @param appname The application name which will be used in the mesh.
- *
- * @return This function will return a pointer to a meshlink::mesh if MeshLink has succesfully set up its configuration files, NULL otherwise.
- */
- static mesh *open(const char *confbase, const char *name, const char* appname) {
- return (mesh *)meshlink_open(confbase, name, appname);
+ if(accepted) {
+ meshlink_set_channel_receive_cb(handle, channel, &channel_receive_trampoline);
+ meshlink_set_channel_poll_cb(handle, channel, &channel_poll_trampoline);
+ }
+
+ return accepted;
}
- /// Close the MeshLink handle.
- /** This function calls meshlink_stop() if necessary,
- * and frees all memory allocated by MeshLink.
- * Afterwards, the handle and any pointers to a struct meshlink_node are invalid.
- */
- static void close(mesh *mesh) {
- meshlink_close(mesh);
+ static void channel_receive_trampoline(meshlink_handle_t *handle, meshlink_channel *channel, const void *data, size_t len) {
+ if(!(handle->priv)) {
+ return;
+ }
+
+ meshlink::mesh *that = static_cast<mesh *>(handle->priv);
+ that->channel_receive(static_cast<meshlink::channel *>(channel), data, len);
}
- static const char *strerror(errno_t err = meshlink_errno) {
- return meshlink_strerror(err);
+ static void channel_poll_trampoline(meshlink_handle_t *handle, meshlink_channel *channel, size_t len) {
+ if(!(handle->priv)) {
+ return;
+ }
+
+ meshlink::mesh *that = static_cast<mesh *>(handle->priv);
+ that->channel_poll(static_cast<meshlink::channel *>(channel), len);
}
+
+ meshlink_handle_t *handle;
};
-#endif // MESHLINKPP_H
+static inline const char *strerror(errno_t err = meshlink_errno) {
+ return meshlink_strerror(err);
+}
+
+/// Destroy a MeshLink instance.
+/** This function remove all configuration files of a MeshLink instance. It should only be called when the application
+ * does not have an open handle to this instance. Afterwards, a call to meshlink_open() will create a completely
+ * new instance.
+ *
+ * @param confbase The directory in which MeshLink stores its configuration files.
+ * After the function returns, the application is free to overwrite or free @a confbase @a.
+ *
+ * @return This function will return true if the MeshLink instance was successfully destroyed, false otherwise.
+ */
+static inline bool destroy(const char *confbase) {
+ return meshlink_destroy(confbase);
+}
+}
+
+#endif
projects / meshlink / blobdiff