5 meshlink++.h -- MeshLink C++ API
6 Copyright (C) 2014, 2017 Guus Sliepen <guus@meshlink.io>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, write to the Free Software Foundation, Inc.,
20 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 #include <new> // for 'placement new'
31 /// Severity of log messages generated by MeshLink.
32 typedef meshlink_log_level_t log_level_t;
34 /// Code of most recent error encountered.
35 typedef meshlink_errno_t errno_t;
37 /// A callback for receiving data from the mesh.
38 /** @param mesh A handle which represents an instance of MeshLink.
39 * @param source A pointer to a meshlink::node describing the source of the data.
40 * @param data A pointer to a buffer containing the data sent by the source.
41 * @param len The length of the received data.
43 typedef void (*receive_cb_t)(mesh *mesh, node *source, const void *data, size_t len);
45 /// A callback reporting node status changes.
46 /** @param mesh A handle which represents an instance of MeshLink.
47 * @param node A pointer to a meshlink::node describing the node whose status changed.
48 * @param reachable True if the node is reachable, false otherwise.
50 typedef void (*node_status_cb_t)(mesh *mesh, node *node, bool reachable);
52 /// A callback reporting duplicate node detection.
53 /** @param mesh A handle which represents an instance of MeshLink.
54 * @param node A pointer to a meshlink_node_t describing the node which is duplicate.
55 * This pointer is valid until meshlink_close() is called.
57 typedef void (*duplicate_cb_t)(mesh *mesh, node *node);
59 /// A callback for receiving log messages generated by MeshLink.
60 /** @param mesh A handle which represents an instance of MeshLink.
61 * @param level An enum describing the severity level of the message.
62 * @param text A pointer to a string containing the textual log message.
64 typedef void (*log_cb_t)(mesh *mesh, log_level_t level, const char *text);
66 /// A callback for accepting incoming channels.
67 /** @param mesh A handle which represents an instance of MeshLink.
68 * @param channel A handle for the incoming channel.
69 * @param port The port number the peer wishes to connect to.
70 * @param data A pointer to a buffer containing data already received. (Not yet used.)
71 * @param len The length of the data. (Not yet used.)
73 * @return This function should return true if the application accepts the incoming channel, false otherwise.
74 * If returning false, the channel is invalid and may not be used anymore.
76 typedef bool (*channel_accept_cb_t)(mesh *mesh, channel *channel, uint16_t port, const void *data, size_t len);
78 /// A callback for receiving data from a channel.
79 /** @param mesh A handle which represents an instance of MeshLink.
80 * @param channel A handle for the channel.
81 * @param data A pointer to a buffer containing data sent by the source.
82 * @param len The length of the data.
84 typedef void (*channel_receive_cb_t)(mesh *mesh, channel *channel, const void *data, size_t len);
86 /// A callback that is called when data can be send on a channel.
87 /** @param mesh A handle which represents an instance of MeshLink.
88 * @param channel A handle for the channel.
89 * @param len The maximum length of data that is guaranteed to be accepted by a call to channel_send().
91 typedef void (*channel_poll_cb_t)(mesh *mesh, channel *channel, size_t len);
93 /// A class describing a MeshLink node.
94 class node: public meshlink_node_t {
97 /// A class describing a MeshLink channel.
98 class channel: public meshlink_channel_t {
100 static const uint32_t RELIABLE = MESHLINK_CHANNEL_RELIABLE;
101 static const uint32_t ORDERED = MESHLINK_CHANNEL_ORDERED;
102 static const uint32_t FRAMED = MESHLINK_CHANNEL_FRAMED;
103 static const uint32_t DROP_LATE = MESHLINK_CHANNEL_DROP_LATE;
104 static const uint32_t TCP = MESHLINK_CHANNEL_TCP;
105 static const uint32_t UDP = MESHLINK_CHANNEL_UDP;
108 /// A class describing a MeshLink mesh.
111 mesh() : handle(0) {}
117 bool isOpen() const {
118 return (handle != 0);
121 // TODO: please enable C++11 in autoconf to enable "move constructors":
122 // mesh(mesh&& other)
123 // : handle(other.handle)
126 // handle->priv = this;
130 /// Initialize MeshLink's configuration directory.
131 /** This function causes MeshLink to initialize its configuration directory,
132 * if it hasn't already been initialized.
133 * It only has to be run the first time the application starts,
134 * but it is not a problem if it is run more than once, as long as
135 * the arguments given are the same.
137 * This function does not start any network I/O yet. The application should
138 * first set callbacks, and then call meshlink_start().
140 * @param confbase The directory in which MeshLink will store its configuration files.
141 * @param name The name which this instance of the application will use in the mesh.
142 * @param appname The application name which will be used in the mesh.
143 * @param dclass The device class which will be used in the mesh.
145 * @return This function will return a pointer to a meshlink::mesh if MeshLink has succesfully set up its configuration files, NULL otherwise.
147 bool open(const char *confbase, const char *name, const char *appname, dev_class_t devclass) {
148 handle = meshlink_open(confbase, name, appname, devclass);
157 mesh(const char *confbase, const char *name, const char *appname, dev_class_t devclass) {
158 open(confbase, name, appname, devclass);
161 /// Close the MeshLink handle.
162 /** This function calls meshlink_stop() if necessary,
163 * and frees all memory allocated by MeshLink.
164 * Afterwards, the handle and any pointers to a struct meshlink_node are invalid.
169 meshlink_close(handle);
175 /** instead of registerin callbacks you derive your own class and overwrite the following abstract member functions.
176 * These functions are run in MeshLink's own thread.
177 * It is therefore important that these functions use apprioriate methods (queues, pipes, locking, etc.)
178 * to hand the data over to the application's thread.
179 * These functions should also not block itself and return as quickly as possible.
180 * The default member functions are no-ops, so you are not required to overwrite all these member functions
183 /// This function is called whenever another node sends data to the local node.
184 virtual void receive(node *source, const void *data, size_t length) {
191 /// This functions is called whenever another node's status changed.
192 virtual void node_status(node *peer, bool reachable) {
198 /// This functions is called whenever a duplicate node is detected.
199 virtual void node_duplicate(node *peer) {
204 /// This functions is called whenever MeshLink has some information to log.
205 virtual void log(log_level_t level, const char *message) {
211 /// This functions is called whenever another node attemps to open a channel to the local node.
213 * If the channel is accepted, the poll_callback will be set to channel_poll and can be
214 * changed using set_channel_poll_cb(). Likewise, the receive callback is set to
217 * The function is run in MeshLink's own thread.
218 * It is therefore important that the callback uses apprioriate methods (queues, pipes, locking, etc.)
219 * to pass data to or from the application's thread.
220 * The callback should also not block itself and return as quickly as possible.
222 * @param channel A handle for the incoming channel.
223 * @param port The port number the peer wishes to connect to.
224 * @param data A pointer to a buffer containing data already received. (Not yet used.)
225 * @param len The length of the data. (Not yet used.)
227 * @return This function should return true if the application accepts the incoming channel, false otherwise.
228 * If returning false, the channel is invalid and may not be used anymore.
230 virtual bool channel_accept(channel *channel, uint16_t port, const void *data, size_t len) {
231 /* by default reject all channels */
239 /// This function is called by Meshlink for receiving data from a channel.
241 * The function is run in MeshLink's own thread.
242 * It is therefore important that the callback uses apprioriate methods (queues, pipes, locking, etc.)
243 * to pass data to or from the application's thread.
244 * The callback should also not block itself and return as quickly as possible.
246 * @param channel A handle for the channel.
247 * @param data A pointer to a buffer containing data sent by the source.
248 * @param len The length of the data.
250 virtual void channel_receive(channel *channel, const void *data, size_t len) {
257 /// This function is called by Meshlink when data can be send on a channel.
259 * The function is run in MeshLink's own thread.
260 * It is therefore important that the callback uses apprioriate methods (queues, pipes, locking, etc.)
261 * to pass data to or from the application's thread.
263 * The callback should also not block itself and return as quickly as possible.
264 * @param channel A handle for the channel.
265 * @param len The maximum length of data that is guaranteed to be accepted by a call to channel_send().
267 virtual void channel_poll(channel *channel, size_t len) {
274 /** This function causes MeshLink to open network sockets, make outgoing connections, and
275 * create a new thread, which will handle all network I/O.
277 * @return This function will return true if MeshLink has succesfully started its thread, false otherwise.
280 meshlink_set_receive_cb(handle, &receive_trampoline);
281 meshlink_set_node_status_cb(handle, &node_status_trampoline);
282 meshlink_set_node_duplicate_cb(handle, &node_duplicate_trampoline);
283 meshlink_set_log_cb(handle, MESHLINK_DEBUG, &log_trampoline);
284 meshlink_set_channel_accept_cb(handle, &channel_accept_trampoline);
285 return meshlink_start(handle);
289 /** This function causes MeshLink to disconnect from all other nodes,
290 * close all sockets, and shut down its own thread.
293 meshlink_stop(handle);
296 /// Send data to another node.
297 /** This functions sends one packet of data to another node in the mesh.
298 * The packet is sent using UDP semantics, which means that
299 * the packet is sent as one unit and is received as one unit,
300 * and that there is no guarantee that the packet will arrive at the destination.
301 * The application should take care of getting an acknowledgement and retransmission if necessary.
303 * @param destination A pointer to a meshlink::node describing the destination for the data.
304 * @param data A pointer to a buffer containing the data to be sent to the source.
305 * @param len The length of the data.
306 * @return This function will return true if MeshLink has queued the message for transmission, and false otherwise.
307 * A return value of true does not guarantee that the message will actually arrive at the destination.
309 bool send(node *destination, const void *data, unsigned int len) {
310 return meshlink_send(handle, destination, data, len);
313 /// Get a handle for a specific node.
314 /** This function returns a handle for the node with the given name.
316 * @param name The name of the node for which a handle is requested.
318 * @return A pointer to a meshlink::node which represents the requested node,
319 * or NULL if the requested node does not exist.
321 node *get_node(const char *name) {
322 return (node *)meshlink_get_node(handle, name);
325 /// Get a handle for our own node.
326 /** This function returns a handle for the local node.
328 * @return A pointer to a meshlink::node which represents the local node.
331 return (node *)meshlink_get_self(handle);
334 /// Get a list of all nodes.
335 /** This function returns a list with handles for all known nodes.
337 * @param nodes A pointer to an array of pointers to meshlink::node, which should be allocated by the application.
338 * @param nmemb The maximum number of pointers that can be stored in the nodes array.
340 * @return The number of known nodes, or -1 in case of an error.
341 * This can be larger than nmemb, in which case not all nodes were stored in the nodes array.
343 node **get_all_nodes(node **nodes, size_t *nmemb) {
344 return (node **)meshlink_get_all_nodes(handle, (meshlink_node_t **)nodes, nmemb);
347 /// Sign data using the local node's MeshLink key.
348 /** This function signs data using the local node's MeshLink key.
349 * The generated signature can be securely verified by other nodes.
351 * @param data A pointer to a buffer containing the data to be signed.
352 * @param len The length of the data to be signed.
353 * @param signature A pointer to a buffer where the signature will be stored.
354 * @param siglen The size of the signature buffer. Will be changed after the call to match the size of the signature itself.
356 * @return This function returns true if the signature is valid, false otherwise.
358 bool sign(const void *data, size_t len, void *signature, size_t *siglen) {
359 return meshlink_sign(handle, data, len, signature, siglen);
362 /// Verify the signature generated by another node of a piece of data.
363 /** This function verifies the signature that another node generated for a piece of data.
365 * @param source A pointer to a meshlink_node_t describing the source of the signature.
366 * @param data A pointer to a buffer containing the data to be verified.
367 * @param len The length of the data to be verified.
368 * @param signature A pointer to a string containing the signature.
369 * @param siglen The size of the signature.
371 * @return This function returns true if the signature is valid, false otherwise.
373 bool verify(node *source, const void *data, size_t len, const void *signature, size_t siglen) {
374 return meshlink_verify(handle, source, data, len, signature, siglen);
377 /// Set the canonical Address for a node.
378 /** This function sets the canonical Address for a node.
379 * This address is stored permanently until it is changed by another call to this function,
380 * unlike other addresses associated with a node,
381 * such as those added with meshlink_hint_address() or addresses discovered at runtime.
383 * If a canonical Address is set for the local node,
384 * it will be used for the hostname part of generated invitation URLs.
386 * @param node A pointer to a meshlink_node_t describing the node.
387 * @param address A nul-terminated C string containing the address, which can be either in numeric format or a hostname.
388 * @param port A nul-terminated C string containing the port, which can be either in numeric or symbolic format.
389 * If it is NULL, the listening port's number will be used.
391 * @return This function returns true if the address was added, false otherwise.
393 bool set_canonical_address(node *node, const char *address, const char *port = NULL) {
394 return meshlink_set_canonical_address(handle, node, address, port);
397 /// Set the canonical Address for the local node.
398 /** This function sets the canonical Address for the local node.
399 * This address is stored permanently until it is changed by another call to this function,
400 * unlike other addresses associated with a node,
401 * such as those added with meshlink_hint_address() or addresses discovered at runtime.
403 * @param address A nul-terminated C string containing the address, which can be either in numeric format or a hostname.
404 * @param port A nul-terminated C string containing the port, which can be either in numeric or symbolic format.
405 * If it is NULL, the listening port's number will be used.
407 * @return This function returns true if the address was added, false otherwise.
409 bool set_canonical_address(const char *address, const char *port = NULL) {
410 return meshlink_set_canonical_address(handle, get_self(), address, port);
413 /// Add an Address for the local node.
414 /** This function adds an Address for the local node, which will be used for invitation URLs.
416 * @param address A string containing the address, which can be either in numeric format or a hostname.
418 * @return This function returns true if the address was added, false otherwise.
420 bool add_address(const char *address) {
421 return meshlink_add_address(handle, address);
424 /** This function performs tries to discover the local node's external address
425 * by contacting the meshlink.io server. If a reverse lookup of the address works,
426 * the FQDN associated with the address will be returned.
428 * Please note that this is function only returns a single address,
429 * even if the local node might have more than one external address.
430 * In that case, there is no control over which address will be selected.
431 * Also note that if you have a dynamic IP address, or are behind carrier-grade NAT,
432 * there is no guarantee that the external address will be valid for an extended period of time.
434 * This function is blocking. It can take several seconds before it returns.
435 * There is no guarantee it will be able to resolve the external address.
436 * Failures might be because by temporary network outages.
438 * @param family The address family to check, for example AF_INET or AF_INET6. If AF_UNSPEC is given,
439 * this might return the external address for any working address family.
441 * @return This function returns a pointer to a C string containing the discovered external address,
442 * or NULL if there was an error looking up the address.
443 * After get_external_address() returns, the application is free to overwrite or free this string.
445 bool get_external_address(int family = AF_UNSPEC) {
446 return meshlink_get_external_address_for_family(handle, family);
449 /** This function performs tries to discover the address of the local interface used for outgoing connection.
451 * Please note that this is function only returns a single address,
452 * even if the local node might have more than one external address.
453 * In that case, there is no control over which address will be selected.
454 * Also note that if you have a dynamic IP address, or are behind carrier-grade NAT,
455 * there is no guarantee that the external address will be valid for an extended period of time.
457 * This function will fail if it couldn't find a local address for the given address family.
458 * If hostname resolving is requested, this function may block for a few seconds.
460 * @param family The address family to check, for example AF_INET or AF_INET6. If AF_UNSPEC is given,
461 * this might return the external address for any working address family.
463 * @return This function returns a pointer to a C string containing the discovered external address,
464 * or NULL if there was an error looking up the address.
465 * After get_external_address() returns, the application is free to overwrite or free this string.
467 bool get_local_address(int family = AF_UNSPEC) {
468 return meshlink_get_local_address_for_family(handle, family);
471 /// Try to discover the external address for the local node, and add it to its list of addresses.
472 /** This function is equivalent to:
474 * mesh->add_address(mesh->get_external_address());
476 * Read the description of get_external_address() for the limitations of this function.
478 * @return This function returns true if the address was added, false otherwise.
480 bool add_external_address() {
481 return meshlink_add_external_address(handle);
484 /// Get the network port used by the local node.
485 /** This function returns the network port that the local node is listening on.
487 * @param mesh A handle which represents an instance of MeshLink.
489 * @return This function returns the port number, or -1 in case of an error.
492 return meshlink_get_port(handle);
495 /// Set the network port used by the local node.
496 /** This function sets the network port that the local node is listening on.
497 * It may only be called when the mesh is not running.
498 * If unsure, call stop() before calling this function.
499 * Also note that if your node is already part of a mesh with other nodes,
500 * that the other nodes may no longer be able to initiate connections to the local node,
501 * since they will try to connect to the previously configured port.
503 * @param port The port number to listen on. This must be between 0 and 65535.
504 * If the port is set to 0, then MeshLink will listen on a port
505 * that is randomly assigned by the operating system every time open() is called.
507 * @return This function returns true if the port was succesfully changed, false otherwise.
509 bool set_port(int port) {
510 return meshlink_set_port(handle, port);
513 /// Set the timeout for invitations.
514 /** This function sets the timeout for invitations.
515 * The timeout is retroactively applied to all outstanding invitations.
517 * @param timeout The timeout for invitations in seconds.
519 void set_invitation_timeout(int timeout) {
520 meshlink_set_invitation_timeout(handle, timeout);
523 /// Invite another node into the mesh.
524 /** This function generates an invitation that can be used by another node to join the same mesh as the local node.
525 * The generated invitation is a string containing a URL.
526 * This URL should be passed by the application to the invitee in a way that no eavesdroppers can see the URL.
527 * The URL can only be used once, after the user has joined the mesh the URL is no longer valid.
529 * @param name The name that the invitee will use in the mesh.
530 * @param flags A bitwise-or'd combination of flags that controls how the URL is generated.
532 * @return This function returns a string that contains the invitation URL.
533 * The application should call free() after it has finished using the URL.
535 char *invite(const char *name, uint32_t flags = 0) {
536 return meshlink_invite_ex(handle, name, flags);
539 /// Use an invitation to join a mesh.
540 /** This function allows the local node to join an existing mesh using an invitation URL generated by another node.
541 * An invitation can only be used if the local node has never connected to other nodes before.
542 * After a succesfully accepted invitation, the name of the local node may have changed.
544 * 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.
546 * This function is blocking. It can take several seconds before it returns.
547 * There is no guarantee it will perform a successful join.
548 * Failures might be caused by temporary network outages, or by the invitation having expired.
550 * @param invitation A string containing the invitation URL.
552 * @return This function returns true if the local node joined the mesh it was invited to, false otherwise.
554 bool join(const char *invitation) {
555 return meshlink_join(handle, invitation);
558 /// Export the local node's key and addresses.
559 /** This function generates a string that contains the local node's public key and one or more IP addresses.
560 * The application can pass it in some way to another node, which can then import it,
561 * granting the local node access to the other node's mesh.
563 * @return This function returns a string that contains the exported key and addresses.
564 * The application should call free() after it has finished using this string.
567 return meshlink_export(handle);
570 /// Import another node's key and addresses.
571 /** This function accepts a string containing the exported public key and addresses of another node.
572 * By importing this data, the local node grants the other node access to its mesh.
574 * @param data A string containing the other node's exported key and addresses.
576 * @return This function returns true if the data was valid and the other node has been granted access to the mesh, false otherwise.
578 bool import_key(const char *data) {
579 return meshlink_import(handle, data);
582 /// Blacklist a node from the mesh.
583 /** This function causes the local node to blacklist another node.
584 * The local node will drop any existing connections to that node,
585 * and will not send data to it nor accept any data received from it any more.
587 * @param node A pointer to a meshlink::node describing the node to be blacklisted.
589 void blacklist(node *node) {
590 return meshlink_blacklist(handle, node);
593 /// Set the poll callback.
594 /** This functions sets the callback that is called whenever data can be sent to another node.
595 * The callback is run in MeshLink's own thread.
596 * It is therefore important that the callback uses apprioriate methods (queues, pipes, locking, etc.)
597 * to pass data to or from the application's thread.
598 * The callback should also not block itself and return as quickly as possible.
600 * @param channel A handle for the channel.
601 * @param cb A pointer to the function which will be called when data can be sent to another node.
602 * If a NULL pointer is given, the callback will be disabled.
604 void set_channel_poll_cb(channel *channel, channel_poll_cb_t cb) {
605 meshlink_set_channel_poll_cb(handle, channel, (meshlink_channel_poll_cb_t)cb);
608 /// Open a reliable stream channel to another node.
609 /** This function is called whenever a remote node wants to open a channel to the local node.
610 * The application then has to decide whether to accept or reject this channel.
612 * This function sets the channel poll callback to channel_poll_trampoline, which in turn
613 * calls channel_poll. To set a differnt, channel-specific poll callback, use set_channel_poll_cb.
615 * @param node The node to which this channel is being initiated.
616 * @param port The port number the peer wishes to connect to.
617 * @param cb A pointer to the function which will be called when the remote node sends data to the local node.
618 * @param data A pointer to a buffer containing data to already queue for sending.
619 * @param len The length of the data.
620 * @param flags A bitwise-or'd combination of flags that set the semantics for this channel.
622 * @return A handle for the channel, or NULL in case of an error.
624 channel *channel_open(node *node, uint16_t port, channel_receive_cb_t cb, const void *data, size_t len, uint32_t flags = channel::TCP) {
625 channel *ch = (channel *)meshlink_channel_open_ex(handle, node, port, (meshlink_channel_receive_cb_t)cb, data, len, flags);
626 meshlink_set_channel_poll_cb(handle, ch, &channel_poll_trampoline);
632 * Sets channel_receive_trampoline as cb, which in turn calls this->channel_receive( ... ).
634 channel *channel_open(node *node, uint16_t port, const void *data, size_t len, uint32_t flags = channel::TCP) {
635 channel *ch = (channel *)meshlink_channel_open_ex(handle, node, port, &channel_receive_trampoline, data, len, flags);
636 meshlink_set_channel_poll_cb(handle, ch, &channel_poll_trampoline);
640 /// Partially close a reliable stream channel.
641 /** This shuts down the read or write side of a channel, or both, without closing the handle.
642 * It can be used to inform the remote node that the local node has finished sending all data on the channel,
643 * but still allows waiting for incoming data from the remote node.
645 * @param channel A handle for the channel.
646 * @param direction Must be one of SHUT_RD, SHUT_WR or SHUT_RDWR.
648 void channel_shutdown(channel *channel, int direction) {
649 return meshlink_channel_shutdown(handle, channel, direction);
652 /// Close a reliable stream channel.
653 /** This informs the remote node that the local node has finished sending all data on the channel.
654 * It also causes the local node to stop accepting incoming data from the remote node.
655 * Afterwards, the channel handle is invalid and must not be used any more.
657 * @param channel A handle for the channel.
659 void channel_close(meshlink_channel_t *channel) {
660 return meshlink_channel_close(handle, channel);
663 /// Transmit data on a channel
664 /** This queues data to send to the remote node.
666 * @param channel A handle for the channel.
667 * @param data A pointer to a buffer containing data sent by the source.
668 * @param len The length of the data.
670 * @return The amount of data that was queued, which can be less than len, or a negative value in case of an error.
672 ssize_t channel_send(channel *channel, void *data, size_t len) {
673 return meshlink_channel_send(handle, channel, data, len);
676 /// Enable or disable zeroconf discovery of local peers
677 /** This controls whether zeroconf discovery using the Catta library will be
678 * enabled to search for peers on the local network. By default, it is enabled.
680 * @param enable Set to true to enable discovery, false to disable.
682 void enable_discovery(bool enable = true) {
683 meshlink_enable_discovery(handle, enable);
688 mesh(const mesh &) /* TODO: C++11: = delete */;
689 void operator=(const mesh &) /* TODO: C++11: = delete */;
691 /// static callback trampolines:
692 static void receive_trampoline(meshlink_handle_t *handle, meshlink_node_t *source, const void *data, size_t length) {
693 if(!(handle->priv)) {
697 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
698 that->receive(static_cast<node *>(source), data, length);
701 static void node_status_trampoline(meshlink_handle_t *handle, meshlink_node_t *peer, bool reachable) {
702 if(!(handle->priv)) {
706 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
707 that->node_status(static_cast<node *>(peer), reachable);
710 static void node_duplicate_trampoline(meshlink_handle_t *handle, meshlink_node_t *peer) {
711 if(!(handle->priv)) {
715 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
716 that->node_duplicate(static_cast<node *>(peer));
719 static void log_trampoline(meshlink_handle_t *handle, log_level_t level, const char *message) {
720 if(!(handle->priv)) {
724 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
725 that->log(level, message);
728 static bool channel_accept_trampoline(meshlink_handle_t *handle, meshlink_channel *channel, uint16_t port, const void *data, size_t len) {
729 if(!(handle->priv)) {
733 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
734 bool accepted = that->channel_accept(static_cast<meshlink::channel *>(channel), port, data, len);
737 meshlink_set_channel_receive_cb(handle, channel, &channel_receive_trampoline);
738 meshlink_set_channel_poll_cb(handle, channel, &channel_poll_trampoline);
744 static void channel_receive_trampoline(meshlink_handle_t *handle, meshlink_channel *channel, const void *data, size_t len) {
745 if(!(handle->priv)) {
749 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
750 that->channel_receive(static_cast<meshlink::channel *>(channel), data, len);
753 static void channel_poll_trampoline(meshlink_handle_t *handle, meshlink_channel *channel, size_t len) {
754 if(!(handle->priv)) {
758 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
759 that->channel_poll(static_cast<meshlink::channel *>(channel), len);
762 meshlink_handle_t *handle;
765 static inline const char *strerror(errno_t err = meshlink_errno) {
766 return meshlink_strerror(err);
769 /// Destroy a MeshLink instance.
770 /** This function remove all configuration files of a MeshLink instance. It should only be called when the application
771 * does not have an open handle to this instance. Afterwards, a call to meshlink_open() will create a completely
774 * @param confbase The directory in which MeshLink stores its configuration files.
775 * After the function returns, the application is free to overwrite or free @a confbase @a.
777 * @return This function will return true if the MeshLink instance was succesfully destroyed, false otherwise.
779 static inline bool destroy(const char *confbase) {
780 return meshlink_destroy(confbase);