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'
32 /// Severity of log messages generated by MeshLink.
33 typedef meshlink_log_level_t log_level_t;
35 /// Code of most recent error encountered.
36 typedef meshlink_errno_t errno_t;
38 /// A callback for receiving data from the mesh.
39 /** @param mesh A handle which represents an instance of MeshLink.
40 * @param source A pointer to a meshlink::node describing the source of the data.
41 * @param data A pointer to a buffer containing the data sent by the source.
42 * @param len The length of the received data.
44 typedef void (*receive_cb_t)(mesh *mesh, node *source, const void *data, size_t len);
46 /// A callback reporting the meta-connection attempt made by the host node to an another node.
47 /** @param mesh A handle which represents an instance of MeshLink.
48 * @param node A pointer to a meshlink_node_t describing the node to whom meta-connection is being tried.
49 * This pointer is valid until meshlink_close() is called.
51 typedef void (*connection_try_cb_t)(mesh *mesh, node *node);
53 /// A callback reporting node status changes.
54 /** @param mesh A handle which represents an instance of MeshLink.
55 * @param node A pointer to a meshlink::node describing the node whose status changed.
56 * @param reachable True if the node is reachable, false otherwise.
58 typedef void (*node_status_cb_t)(mesh *mesh, node *node, bool reachable);
60 /// A callback reporting node path MTU changes.
61 /** @param mesh A handle which represents an instance of MeshLink.
62 * @param node A pointer to a meshlink_node_t describing the node whose status changed.
63 * This pointer is valid until meshlink_close() is called.
64 * @param pmtu The current path MTU to the node, or 0 if UDP communication is not (yet) possible.
66 typedef void (*node_pmtu_cb_t)(mesh *mesh, node *node, uint16_t pmtu);
68 /// A callback reporting duplicate node detection.
69 /** @param mesh A handle which represents an instance of MeshLink.
70 * @param node A pointer to a meshlink_node_t describing the node which is duplicate.
71 * This pointer is valid until meshlink_close() is called.
73 typedef void (*duplicate_cb_t)(mesh *mesh, node *node);
75 /// A callback for receiving log messages generated by MeshLink.
76 /** @param mesh A handle which represents an instance of MeshLink.
77 * @param level An enum describing the severity level of the message.
78 * @param text A pointer to a string containing the textual log message.
80 typedef void (*log_cb_t)(mesh *mesh, log_level_t level, const char *text);
82 /// A callback for listening for incoming channels.
83 /** @param mesh A handle which represents an instance of MeshLink.
84 * @param node A handle for the node that wants to open a channel.
85 * @param port The port number the peer wishes to connect to.
87 * @return This function should return true if the application listens for the incoming channel, false otherwise.
89 typedef bool (*meshlink_channel_listen_cb_t)(struct meshlink_handle *mesh, struct meshlink_node *node, uint16_t port);
91 /// A callback for accepting incoming channels.
92 /** @param mesh A handle which represents an instance of MeshLink.
93 * @param channel A handle for the incoming channel.
94 * @param port The port number the peer wishes to connect to.
95 * @param data A pointer to a buffer containing data already received. (Not yet used.)
96 * @param len The length of the data. (Not yet used.)
98 * @return This function should return true if the application accepts the incoming channel, false otherwise.
99 * If returning false, the channel is invalid and may not be used anymore.
101 typedef bool (*channel_accept_cb_t)(mesh *mesh, channel *channel, uint16_t port, const void *data, size_t len);
103 /// A callback for receiving data from a channel.
104 /** @param mesh A handle which represents an instance of MeshLink.
105 * @param channel A handle for the channel.
106 * @param data A pointer to a buffer containing data sent by the source.
107 * @param len The length of the data.
109 typedef void (*channel_receive_cb_t)(mesh *mesh, channel *channel, const void *data, size_t len);
111 /// A callback that is called when data can be send on a channel.
112 /** @param mesh A handle which represents an instance of MeshLink.
113 * @param channel A handle for the channel.
114 * @param len The maximum length of data that is guaranteed to be accepted by a call to channel_send().
116 typedef void (*channel_poll_cb_t)(mesh *mesh, channel *channel, size_t len);
118 /// A callback for cleaning up buffers submitted for asynchronous I/O.
119 /** This callbacks signals that MeshLink has finished using this buffer.
120 * The ownership of the buffer is now back into the application's hands.
122 * @param mesh A handle which represents an instance of MeshLink.
123 * @param channel A handle for the channel which used this buffer.
124 * @param data A pointer to a buffer containing the enqueued data.
125 * @param len The length of the buffer.
126 * @param priv A private pointer which was set by the application when submitting the buffer.
128 typedef void (*aio_cb_t)(mesh *mesh, channel *channel, const void *data, size_t len, void *priv);
130 /// A callback for asynchronous I/O to and from filedescriptors.
131 /** This callbacks signals that MeshLink has finished using this filedescriptor.
133 * @param mesh A handle which represents an instance of MeshLink.
134 * @param channel A handle for the channel which used this filedescriptor.
135 * @param fd The filedescriptor that was used.
136 * @param len The length of the data that was successfully sent or received.
137 * @param priv A private pointer which was set by the application when submitting the buffer.
139 typedef void (*aio_fd_cb_t)(mesh *mesh, channel *channel, int fd, size_t len, void *priv);
141 /// A class describing a MeshLink node.
142 class node: public meshlink_node_t {
145 /// A class describing a MeshLink Sub-Mesh.
146 class submesh: public meshlink_submesh_t {
149 /// A class describing a MeshLink channel.
150 class channel: public meshlink_channel_t {
152 static const uint32_t RELIABLE = MESHLINK_CHANNEL_RELIABLE;
153 static const uint32_t ORDERED = MESHLINK_CHANNEL_ORDERED;
154 static const uint32_t FRAMED = MESHLINK_CHANNEL_FRAMED;
155 static const uint32_t DROP_LATE = MESHLINK_CHANNEL_DROP_LATE;
156 static const uint32_t NO_PARTIAL = MESHLINK_CHANNEL_NO_PARTIAL;
157 static const uint32_t TCP = MESHLINK_CHANNEL_TCP;
158 static const uint32_t UDP = MESHLINK_CHANNEL_UDP;
161 /// A class describing a MeshLink mesh.
164 mesh() : handle(0) {}
170 bool isOpen() const {
171 return (handle != 0);
174 // TODO: please enable C++11 in autoconf to enable "move constructors":
175 // mesh(mesh&& other)
176 // : handle(other.handle)
179 // handle->priv = this;
183 /// Initialize MeshLink's configuration directory.
184 /** This function causes MeshLink to initialize its configuration directory,
185 * if it hasn't already been initialized.
186 * It only has to be run the first time the application starts,
187 * but it is not a problem if it is run more than once, as long as
188 * the arguments given are the same.
190 * This function does not start any network I/O yet. The application should
191 * first set callbacks, and then call meshlink_start().
193 * @param confbase The directory in which MeshLink will store its configuration files.
194 * @param name The name which this instance of the application will use in the mesh.
195 * @param appname The application name which will be used in the mesh.
196 * @param devclass The device class which will be used in the mesh.
198 * @return This function will return a pointer to a meshlink::mesh if MeshLink has successfully set up its configuration files, NULL otherwise.
200 bool open(const char *confbase, const char *name, const char *appname, dev_class_t devclass) {
201 handle = meshlink_open(confbase, name, appname, devclass);
210 mesh(const char *confbase, const char *name, const char *appname, dev_class_t devclass) {
211 open(confbase, name, appname, devclass);
214 /// Close the MeshLink handle.
215 /** This function calls meshlink_stop() if necessary,
216 * and frees all memory allocated by MeshLink.
217 * Afterwards, the handle and any pointers to a struct meshlink_node are invalid.
222 meshlink_close(handle);
228 /** instead of registerin callbacks you derive your own class and overwrite the following abstract member functions.
229 * These functions are run in MeshLink's own thread.
230 * It is therefore important that these functions use apprioriate methods (queues, pipes, locking, etc.)
231 * to hand the data over to the application's thread.
232 * These functions should also not block itself and return as quickly as possible.
233 * The default member functions are no-ops, so you are not required to overwrite all these member functions
236 /// This function is called whenever another node sends data to the local node.
237 virtual void receive(node *source, const void *data, size_t length) {
244 /// This functions is called whenever another node's status changed.
245 virtual void node_status(node *peer, bool reachable) {
251 /// This functions is called whenever another node's path MTU changes.
252 virtual void node_pmtu(node *peer, uint16_t pmtu) {
258 /// This functions is called whenever a duplicate node is detected.
259 virtual void node_duplicate(node *peer) {
264 /// This functions is called whenever MeshLink has some information to log.
265 virtual void log(log_level_t level, const char *message) {
271 /// This functions is called whenever MeshLink has encountered a serious error.
272 virtual void error(meshlink_errno_t meshlink_errno) {
274 (void)meshlink_errno;
277 /// This functions is called whenever MeshLink is blacklisted by another node.
278 virtual void blacklisted(node *peer) {
283 /// This functions is called whenever MeshLink a meta-connection attempt is made.
284 virtual void connection_try(node *peer) {
289 /// This functions is called to determine if we are listening for incoming channels.
291 * The function is run in MeshLink's own thread.
292 * It is therefore important that the callback uses apprioriate methods (queues, pipes, locking, etc.)
293 * to pass data to or from the application's thread.
294 * The callback should also not block itself and return as quickly as possible.
296 * @param node A handle for the node that wants to open a channel.
297 * @param port The port number the peer wishes to connect to.
299 * @return This function should return true if the application accepts the incoming channel, false otherwise.
301 virtual bool channel_listen(node *node, uint16_t port) {
302 /* by default accept all channels */
308 /// This functions is called whenever another node attempts to open a channel to the local node.
310 * If the channel is accepted, the poll_callback will be set to channel_poll and can be
311 * changed using set_channel_poll_cb(). Likewise, the receive callback is set to
314 * The function is run in MeshLink's own thread.
315 * It is therefore important that the callback uses apprioriate methods (queues, pipes, locking, etc.)
316 * to pass data to or from the application's thread.
317 * The callback should also not block itself and return as quickly as possible.
319 * @param channel A handle for the incoming channel.
320 * @param port The port number the peer wishes to connect to.
321 * @param data A pointer to a buffer containing data already received. (Not yet used.)
322 * @param len The length of the data. (Not yet used.)
324 * @return This function should return true if the application accepts the incoming channel, false otherwise.
325 * If returning false, the channel is invalid and may not be used anymore.
327 virtual bool channel_accept(channel *channel, uint16_t port, const void *data, size_t len) {
328 /* by default reject all channels */
336 /// This function is called by Meshlink for receiving data from a channel.
338 * The function is run in MeshLink's own thread.
339 * It is therefore important that the callback uses apprioriate methods (queues, pipes, locking, etc.)
340 * to pass data to or from the application's thread.
341 * The callback should also not block itself and return as quickly as possible.
343 * @param channel A handle for the channel.
344 * @param data A pointer to a buffer containing data sent by the source.
345 * @param len The length of the data.
347 virtual void channel_receive(channel *channel, const void *data, size_t len) {
354 /// This function is called by Meshlink when data can be send on a channel.
356 * The function is run in MeshLink's own thread.
357 * It is therefore important that the callback uses apprioriate methods (queues, pipes, locking, etc.)
358 * to pass data to or from the application's thread.
360 * The callback should also not block itself and return as quickly as possible.
361 * @param channel A handle for the channel.
362 * @param len The maximum length of data that is guaranteed to be accepted by a call to channel_send().
364 virtual void channel_poll(channel *channel, size_t len) {
371 /** This function causes MeshLink to open network sockets, make outgoing connections, and
372 * create a new thread, which will handle all network I/O.
374 * @return This function will return true if MeshLink has successfully started its thread, false otherwise.
377 meshlink_set_receive_cb(handle, &receive_trampoline);
378 meshlink_set_node_status_cb(handle, &node_status_trampoline);
379 meshlink_set_node_pmtu_cb(handle, &node_pmtu_trampoline);
380 meshlink_set_node_duplicate_cb(handle, &node_duplicate_trampoline);
381 meshlink_set_log_cb(handle, MESHLINK_DEBUG, &log_trampoline);
382 meshlink_set_error_cb(handle, &error_trampoline);
383 meshlink_set_blacklisted_cb(handle, &blacklisted_trampoline);
384 meshlink_set_channel_listen_cb(handle, &channel_listen_trampoline);
385 meshlink_set_channel_accept_cb(handle, &channel_accept_trampoline);
386 meshlink_set_connection_try_cb(handle, &connection_try_trampoline);
387 return meshlink_start(handle);
391 /** This function causes MeshLink to disconnect from all other nodes,
392 * close all sockets, and shut down its own thread.
395 meshlink_stop(handle);
398 /// Send data to another node.
399 /** This functions sends one packet of data to another node in the mesh.
400 * The packet is sent using UDP semantics, which means that
401 * the packet is sent as one unit and is received as one unit,
402 * and that there is no guarantee that the packet will arrive at the destination.
403 * The application should take care of getting an acknowledgement and retransmission if necessary.
405 * @param destination A pointer to a meshlink::node describing the destination for the data.
406 * @param data A pointer to a buffer containing the data to be sent to the source.
407 * @param len The length of the data.
408 * @return This function will return true if MeshLink has queued the message for transmission, and false otherwise.
409 * A return value of true does not guarantee that the message will actually arrive at the destination.
411 bool send(node *destination, const void *data, unsigned int len) {
412 return meshlink_send(handle, destination, data, len);
415 /// Get a handle for a specific node.
416 /** This function returns a handle for the node with the given name.
418 * @param name The name of the node for which a handle is requested.
420 * @return A pointer to a meshlink::node which represents the requested node,
421 * or NULL if the requested node does not exist.
423 node *get_node(const char *name) {
424 return (node *)meshlink_get_node(handle, name);
427 /// Get a node's reachability status.
428 /** This function returns the current reachability of a given node, and the times of the last state changes.
429 * If a given state change never happened, the time returned will be 0.
431 * @param node A pointer to a meshlink::node describing the node.
432 * @param last_reachable A pointer to a time_t variable that will be filled in with the last time the node became reachable.
433 * @param last_unreachable A pointer to a time_t variable that will be filled in with the last time the node became unreachable.
435 * @return This function returns true if the node is currently reachable, false otherwise.
437 bool get_node_reachability(node *node, time_t *last_reachable = NULL, time_t *last_unreachable = NULL) {
438 return meshlink_get_node_reachability(handle, node, last_reachable, last_unreachable);
441 /// Get a node's blacklist status.
442 /** This function returns the current blacklist status of a given node.
444 * @param node A pointer to a meshlink::node describing the node.
446 * @return This function returns true if the node is currently blacklisted, false otherwise.
448 bool get_node_blacklisted(node *node) {
449 return meshlink_get_node_blacklisted(handle, node);
452 /// Get a handle for a specific submesh.
453 /** This function returns a handle for the submesh with the given name.
455 * @param name The name of the submesh for which a handle is requested.
457 * @return A pointer to a meshlink::submesh which represents the requested submesh,
458 * or NULL if the requested submesh does not exist.
460 submesh *get_submesh(const char *name) {
461 return (submesh *)meshlink_get_submesh(handle, name);
464 /// Get a handle for our own node.
465 /** This function returns a handle for the local node.
467 * @return A pointer to a meshlink::node which represents the local node.
470 return (node *)meshlink_get_self(handle);
473 /// Get a list of all nodes.
474 /** This function returns a list with handles for all known nodes.
476 * @param nodes A pointer to an array of pointers to meshlink::node, which should be allocated by the application.
477 * @param nmemb The maximum number of pointers that can be stored in the nodes array.
479 * @return The number of known nodes, or -1 in case of an error.
480 * This can be larger than nmemb, in which case not all nodes were stored in the nodes array.
482 node **get_all_nodes(node **nodes, size_t *nmemb) {
483 return (node **)meshlink_get_all_nodes(handle, (meshlink_node_t **)nodes, nmemb);
486 /// Get a list of all nodes by blacklist status.
487 /** This function returns a list with handles for all the nodes who were either blacklisted or whitelisted.
489 * @param blacklisted If true, a list of blacklisted nodes will be returned, otherwise whitelisted nodes.
490 * @param nodes A pointer to an array of pointers to meshlink::node, which should be allocated by the application.
491 * @param nmemb The maximum number of pointers that can be stored in the nodes array.
493 * @return A pointer to an array containing pointers to all known nodes with the given blacklist status.
494 * If the @a nodes argument was not NULL, then the return value can either be the same value or a different value.
495 * If it is a new value, the old value of @a nodes should not be used anymore.
496 * If the new value is NULL, then the old array will have been freed by MeshLink.
498 node **get_all_nodes_by_blacklisted(bool blacklisted, node **nodes, size_t *nmemb) {
499 return (node **)meshlink_get_all_nodes_by_blacklisted(handle, blacklisted, (meshlink_node_t **)nodes, nmemb);
502 /// Sign data using the local node's MeshLink key.
503 /** This function signs data using the local node's MeshLink key.
504 * The generated signature can be securely verified by other nodes.
506 * @param data A pointer to a buffer containing the data to be signed.
507 * @param len The length of the data to be signed.
508 * @param signature A pointer to a buffer where the signature will be stored.
509 * @param siglen The size of the signature buffer. Will be changed after the call to match the size of the signature itself.
511 * @return This function returns true if the signature is valid, false otherwise.
513 bool sign(const void *data, size_t len, void *signature, size_t *siglen) {
514 return meshlink_sign(handle, data, len, signature, siglen);
517 /// Verify the signature generated by another node of a piece of data.
518 /** This function verifies the signature that another node generated for a piece of data.
520 * @param source A pointer to a meshlink_node_t describing the source of the signature.
521 * @param data A pointer to a buffer containing the data to be verified.
522 * @param len The length of the data to be verified.
523 * @param signature A pointer to a string containing the signature.
524 * @param siglen The size of the signature.
526 * @return This function returns true if the signature is valid, false otherwise.
528 bool verify(node *source, const void *data, size_t len, const void *signature, size_t siglen) {
529 return meshlink_verify(handle, source, data, len, signature, siglen);
532 /// Set the canonical Address for a node.
533 /** This function sets the canonical Address for a node.
534 * This address is stored permanently until it is changed by another call to this function,
535 * unlike other addresses associated with a node,
536 * such as those added with meshlink_hint_address() or addresses discovered at runtime.
538 * If a canonical Address is set for the local node,
539 * it will be used for the hostname part of generated invitation URLs.
541 * @param node A pointer to a meshlink_node_t describing the node.
542 * @param address A nul-terminated C string containing the address, which can be either in numeric format or a hostname.
543 * @param port A nul-terminated C string containing the port, which can be either in numeric or symbolic format.
544 * If it is NULL, the listening port's number will be used.
546 * @return This function returns true if the address was added, false otherwise.
548 bool set_canonical_address(node *node, const char *address, const char *port = NULL) {
549 return meshlink_set_canonical_address(handle, node, address, port);
552 /// Clear the canonical Address for a node.
553 /** This function clears the canonical Address for a node.
555 * @param node A pointer to a struct meshlink_node describing the node.
557 * @return This function returns true if the address was removed, false otherwise.
559 bool clear_canonical_address(node *node) {
560 return meshlink_clear_canonical_address(handle, node);
563 /// Add an invitation address for the local node.
564 /** This function adds an address for the local node, which will be used only for invitation URLs.
565 * This address is not stored permanently.
566 * Multiple addresses can be added using multiple calls to this function.
568 * @param address A nul-terminated C string containing the address, which can be either in numeric format or a hostname.
569 * @param port A nul-terminated C string containing the port, which can be either in numeric or symbolic format.
570 * If it is NULL, the listening port's number will be used.
572 * @return This function returns true if the address was added, false otherwise.
574 bool add_invitation_address(const char *address, const char *port) {
575 return meshlink_add_invitation_address(handle, address, port);
578 /// Clears all invitation address for the local node.
579 /** This function removes all addresses added with meshlink_add_invitation_address().
581 void clear_invitation_addresses() {
582 return meshlink_clear_invitation_addresses(handle);
585 /// Add an Address for the local node.
586 /** This function adds an Address for the local node, which will be used for invitation URLs.
587 * @deprecated This function is deprecated, use set_canonical_address() and/or add_invitation_address().
589 * @param address A string containing the address, which can be either in numeric format or a hostname.
591 * @return This function returns true if the address was added, false otherwise.
593 bool add_address(const char *address) __attribute__((__deprecated__("use set_canonical_address() and/or add_invitation_address() instead"))) {
594 return meshlink_set_canonical_address(handle, get_self(), address, NULL);
597 /** This function performs tries to discover the local node's external address
598 * by contacting the meshlink.io server. If a reverse lookup of the address works,
599 * the FQDN associated with the address will be returned.
601 * Please note that this is function only returns a single address,
602 * even if the local node might have more than one external address.
603 * In that case, there is no control over which address will be selected.
604 * Also note that if you have a dynamic IP address, or are behind carrier-grade NAT,
605 * there is no guarantee that the external address will be valid for an extended period of time.
607 * This function is blocking. It can take several seconds before it returns.
608 * There is no guarantee it will be able to resolve the external address.
609 * Failures might be because by temporary network outages.
611 * @param family The address family to check, for example AF_INET or AF_INET6. If AF_UNSPEC is given,
612 * this might return the external address for any working address family.
614 * @return This function returns a pointer to a C string containing the discovered external address,
615 * or NULL if there was an error looking up the address.
616 * After get_external_address() returns, the application is free to overwrite or free this string.
618 bool get_external_address(int family = AF_UNSPEC) {
619 return meshlink_get_external_address_for_family(handle, family);
622 /** This function performs tries to discover the address of the local interface used for outgoing connection.
624 * Please note that this is function only returns a single address,
625 * even if the local node might have more than one external address.
626 * In that case, there is no control over which address will be selected.
627 * Also note that if you have a dynamic IP address, or are behind carrier-grade NAT,
628 * there is no guarantee that the external address will be valid for an extended period of time.
630 * This function will fail if it couldn't find a local address for the given address family.
631 * If hostname resolving is requested, this function may block for a few seconds.
633 * @param family The address family to check, for example AF_INET or AF_INET6. If AF_UNSPEC is given,
634 * this might return the external address for any working address family.
636 * @return This function returns a pointer to a C string containing the discovered external address,
637 * or NULL if there was an error looking up the address.
638 * After get_external_address() returns, the application is free to overwrite or free this string.
640 bool get_local_address(int family = AF_UNSPEC) {
641 return meshlink_get_local_address_for_family(handle, family);
644 /// Try to discover the external address for the local node, and add it to its list of addresses.
645 /** This function is equivalent to:
647 * mesh->add_address(mesh->get_external_address());
649 * Read the description of get_external_address() for the limitations of this function.
651 * @return This function returns true if the address was added, false otherwise.
653 bool add_external_address() {
654 return meshlink_add_external_address(handle);
657 /// Get the network port used by the local node.
658 /** This function returns the network port that the local node is listening on.
660 * @return This function returns the port number, or -1 in case of an error.
663 return meshlink_get_port(handle);
666 /// Set the network port used by the local node.
667 /** This function sets the network port that the local node is listening on.
668 * It may only be called when the mesh is not running.
669 * If unsure, call stop() before calling this function.
670 * Also note that if your node is already part of a mesh with other nodes,
671 * that the other nodes may no longer be able to initiate connections to the local node,
672 * since they will try to connect to the previously configured port.
674 * @param port The port number to listen on. This must be between 0 and 65535.
675 * If the port is set to 0, then MeshLink will listen on a port
676 * that is randomly assigned by the operating system every time open() is called.
678 * @return This function returns true if the port was successfully changed
679 * to the desired port, false otherwise. If it returns false, there
680 * is no guarantee that MeshLink is listening on the old port.
682 bool set_port(int port) {
683 return meshlink_set_port(handle, port);
686 /// Set the timeout for invitations.
687 /** This function sets the timeout for invitations.
688 * The timeout is retroactively applied to all outstanding invitations.
690 * @param timeout The timeout for invitations in seconds.
692 void set_invitation_timeout(int timeout) {
693 meshlink_set_invitation_timeout(handle, timeout);
696 /// Set the scheduling granularity of the application
697 /** This should be set to the effective scheduling granularity for the application.
698 * This depends on the scheduling granularity of the operating system, the application's
699 * process priority and whether it is running as realtime or not.
700 * The default value is 10000 (10 milliseconds).
702 * @param granularity The scheduling granularity of the application in microseconds.
704 void set_granularity(long granularity) {
705 meshlink_set_scheduling_granularity(handle, granularity);
708 /// Sets the storage policy used by MeshLink
709 /** This sets the policy MeshLink uses when it has new information about nodes.
710 * By default, all udpates will be stored to disk (unless an ephemeral instance has been opened).
711 * Setting the policy to MESHLINK_STORAGE_KEYS_ONLY, only updates that contain new keys for nodes
712 * are stored, as well as blacklist/whitelist settings.
713 * By setting the policy to MESHLINK_STORAGE_DISABLED, no updates will be stored.
715 * @param policy The storage policy to use.
717 void set_storage_policy(meshlink_storage_policy_t policy) {
718 meshlink_set_storage_policy(handle, policy);
721 /// Invite another node into the mesh.
722 /** This function generates an invitation that can be used by another node to join the same mesh as the local node.
723 * The generated invitation is a string containing a URL.
724 * This URL should be passed by the application to the invitee in a way that no eavesdroppers can see the URL.
725 * The URL can only be used once, after the user has joined the mesh the URL is no longer valid.
727 * @param submesh A handle to the submesh to put the invitee in.
728 * @param name The name that the invitee will use in the mesh.
729 * @param flags A bitwise-or'd combination of flags that controls how the URL is generated.
731 * @return This function returns a string that contains the invitation URL.
732 * The application should call free() after it has finished using the URL.
734 char *invite(submesh *submesh, const char *name, uint32_t flags = 0) {
735 return meshlink_invite_ex(handle, submesh, name, flags);
738 /// Use an invitation to join a mesh.
739 /** This function allows the local node to join an existing mesh using an invitation URL generated by another node.
740 * An invitation can only be used if the local node has never connected to other nodes before.
741 * After a successfully accepted invitation, the name of the local node may have changed.
743 * 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.
745 * This function is blocking. It can take several seconds before it returns.
746 * There is no guarantee it will perform a successful join.
747 * Failures might be caused by temporary network outages, or by the invitation having expired.
749 * @param invitation A string containing the invitation URL.
751 * @return This function returns true if the local node joined the mesh it was invited to, false otherwise.
753 bool join(const char *invitation) {
754 return meshlink_join(handle, invitation);
757 /// Export the local node's key and addresses.
758 /** This function generates a string that contains the local node's public key and one or more IP addresses.
759 * The application can pass it in some way to another node, which can then import it,
760 * granting the local node access to the other node's mesh.
762 * @return This function returns a string that contains the exported key and addresses.
763 * The application should call free() after it has finished using this string.
766 return meshlink_export(handle);
769 /// Import another node's key and addresses.
770 /** This function accepts a string containing the exported public key and addresses of another node.
771 * By importing this data, the local node grants the other node access to its mesh.
773 * @param data A string containing the other node's exported key and addresses.
775 * @return This function returns true if the data was valid and the other node has been granted access to the mesh, false otherwise.
777 bool import_key(const char *data) {
778 return meshlink_import(handle, data);
781 /// Forget any information about a node.
782 /** This function allows the local node to forget any information it has about a node,
783 * and if possible will remove any data it has stored on disk about the node.
785 * Any open channels to this node must be closed before calling this function.
787 * After this call returns, the node handle is invalid and may no longer be used, regardless
788 * of the return value of this call.
790 * Note that this function does not prevent MeshLink from actually forgetting about a node,
791 * or re-learning information about a node at a later point in time. It is merely a hint that
792 * the application does not care about this node anymore and that any resources kept could be
795 * \memberof meshlink_node
796 * @param node A pointer to a struct meshlink_node describing the node to be forgotten.
798 * @return This function returns true if all currently known data about the node has been forgotten, false otherwise.
800 bool forget_node(node *node) {
801 return meshlink_forget_node(handle, node);
804 /// Blacklist a node from the mesh.
805 /** This function causes the local node to blacklist another node.
806 * The local node will drop any existing connections to that node,
807 * and will not send data to it nor accept any data received from it any more.
809 * @param node A pointer to a meshlink::node describing the node to be blacklisted.
811 * @return This function returns true if the node has been whitelisted, false otherwise.
813 bool blacklist(node *node) {
814 return meshlink_blacklist(handle, node);
817 /// Blacklist a node from the mesh by name.
818 /** This function causes the local node to blacklist another node by name.
819 * The local node will drop any existing connections to that node,
820 * and will not send data to it nor accept any data received from it any more.
822 * If no node by the given name is known, it is created.
824 * @param name The name of the node to blacklist.
826 * @return This function returns true if the node has been blacklisted, false otherwise.
828 bool blacklist_by_name(const char *name) {
829 return meshlink_blacklist_by_name(handle, name);
832 /// Whitelist a node on the mesh.
833 /** This function causes the local node to whitelist another node.
834 * The local node will allow connections to and from that node,
835 * and will send data to it and accept any data received from it.
837 * @param node A pointer to a meshlink::node describing the node to be whitelisted.
839 * @return This function returns true if the node has been whitelisted, false otherwise.
841 bool whitelist(node *node) {
842 return meshlink_whitelist(handle, node);
845 /// Whitelist a node on the mesh by name.
846 /** This function causes the local node to whitelist a node by name.
847 * The local node will allow connections to and from that node,
848 * and will send data to it and accept any data received from it.
850 * If no node by the given name is known, it is created.
851 * This is useful if new nodes are blacklisted by default.
853 * \memberof meshlink_node
854 * @param name The name of the node to whitelist.
856 * @return This function returns true if the node has been whitelisted, false otherwise.
858 bool whitelist_by_name(const char *name) {
859 return meshlink_whitelist_by_name(handle, name);
862 /// Set the poll callback.
863 /** This functions sets the callback that is called whenever data can be sent to another node.
864 * The callback is run in MeshLink's own thread.
865 * It is therefore important that the callback uses apprioriate methods (queues, pipes, locking, etc.)
866 * to pass data to or from the application's thread.
867 * The callback should also not block itself and return as quickly as possible.
869 * @param channel A handle for the channel.
870 * @param cb A pointer to the function which will be called when data can be sent to another node.
871 * If a NULL pointer is given, the callback will be disabled.
873 void set_channel_poll_cb(channel *channel, channel_poll_cb_t cb) {
874 meshlink_set_channel_poll_cb(handle, channel, (meshlink_channel_poll_cb_t)cb);
877 /// Set the send buffer size of a channel.
878 /** This function sets the desired size of the send buffer.
879 * The default size is 128 kB.
881 * @param channel A handle for the channel.
882 * @param size The desired size for the send buffer.
883 * If a NULL pointer is given, the callback will be disabled.
885 void set_channel_sndbuf(channel *channel, size_t size) {
886 meshlink_set_channel_sndbuf(handle, channel, size);
889 /// Set the receive buffer size of a channel.
890 /** This function sets the desired size of the receive buffer.
891 * The default size is 128 kB.
893 * @param channel A handle for the channel.
894 * @param size The desired size for the send buffer.
895 * If a NULL pointer is given, the callback will be disabled.
897 void set_channel_rcvbuf(channel *channel, size_t size) {
898 meshlink_set_channel_rcvbuf(handle, channel, size);
901 /// Set the flags of a channel.
902 /** This function allows changing some of the channel flags.
903 * Currently only MESHLINK_CHANNEL_NO_PARTIAL and MESHLINK_CHANNEL_DROP_LATE are supported, other flags are ignored.
904 * These flags only affect the local side of the channel with the peer.
905 * The changes take effect immediately.
907 * @param channel A handle for the channel.
908 * @param flags A bitwise-or'd combination of flags that set the semantics for this channel.
910 void set_channel_flags(channel *channel, uint32_t flags) {
911 meshlink_set_channel_flags(handle, channel, flags);
914 /// Set the send buffer storage of a channel.
915 /** This function provides MeshLink with a send buffer allocated by the application.
917 * @param channel A handle for the channel.
918 * @param buf A pointer to the start of the buffer.
919 * If a NULL pointer is given, MeshLink will use its own internal buffer again.
920 * @param size The size of the buffer.
922 void set_channel_sndbuf_storage(channel *channel, void *buf, size_t size) {
923 meshlink_set_channel_sndbuf_storage(handle, channel, buf, size);
926 /// Set the receive buffer storage of a channel.
927 /** This function provides MeshLink with a receive buffer allocated by the application.
929 * @param channel A handle for the channel.
930 * @param buf A pointer to the start of the buffer.
931 * If a NULL pointer is given, MeshLink will use its own internal buffer again.
932 * @param size The size of the buffer.
934 void set_channel_rcvbuf_storage(channel *channel, void *buf, size_t size) {
935 meshlink_set_channel_rcvbuf_storage(handle, channel, buf, size);
938 /// Set the connection timeout used for channels to the given node.
939 /** This sets the timeout after which unresponsive channels will be reported as closed.
940 * The timeout is set for all current and future channels to the given node.
942 * @param node The node to set the channel timeout for.
943 * @param timeout The timeout in seconds after which unresponsive channels will be reported as closed.
944 * The default is 60 seconds.
946 void set_node_channel_timeout(node *node, int timeout) {
947 meshlink_set_node_channel_timeout(handle, node, timeout);
950 /// Open a reliable stream channel to another node.
951 /** This function is called whenever a remote node wants to open a channel to the local node.
952 * The application then has to decide whether to accept or reject this channel.
954 * This function sets the channel poll callback to channel_poll_trampoline, which in turn
955 * calls channel_poll. To set a different, channel-specific poll callback, use set_channel_poll_cb.
957 * @param node The node to which this channel is being initiated.
958 * @param port The port number the peer wishes to connect to.
959 * @param cb A pointer to the function which will be called when the remote node sends data to the local node.
960 * @param data A pointer to a buffer containing data to already queue for sending.
961 * @param len The length of the data.
962 * If len is 0, the data pointer is copied into the channel's priv member.
963 * @param flags A bitwise-or'd combination of flags that set the semantics for this channel.
965 * @return A handle for the channel, or NULL in case of an error.
967 channel *channel_open(node *node, uint16_t port, channel_receive_cb_t cb, const void *data, size_t len, uint32_t flags = channel::TCP) {
968 channel *ch = (channel *)meshlink_channel_open_ex(handle, node, port, (meshlink_channel_receive_cb_t)cb, data, len, flags);
969 meshlink_set_channel_poll_cb(handle, ch, &channel_poll_trampoline);
973 /// Open a reliable stream channel to another node.
974 /** This function is called whenever a remote node wants to open a channel to the local node.
975 * The application then has to decide whether to accept or reject this channel.
977 * This function sets the channel receive callback to channel_receive_trampoline,
978 * which in turn calls channel_receive.
980 * This function sets the channel poll callback to channel_poll_trampoline, which in turn
981 * calls channel_poll. To set a different, channel-specific poll callback, use set_channel_poll_cb.
983 * @param node The node to which this channel is being initiated.
984 * @param port The port number the peer wishes to connect to.
985 * @param data A pointer to a buffer containing data to already queue for sending.
986 * @param len The length of the data.
987 * If len is 0, the data pointer is copied into the channel's priv member.
988 * @param flags A bitwise-or'd combination of flags that set the semantics for this channel.
990 * @return A handle for the channel, or NULL in case of an error.
992 channel *channel_open(node *node, uint16_t port, const void *data, size_t len, uint32_t flags = channel::TCP) {
993 channel *ch = (channel *)meshlink_channel_open_ex(handle, node, port, &channel_receive_trampoline, data, len, flags);
994 meshlink_set_channel_poll_cb(handle, ch, &channel_poll_trampoline);
998 /// Partially close a reliable stream channel.
999 /** This shuts down the read or write side of a channel, or both, without closing the handle.
1000 * It can be used to inform the remote node that the local node has finished sending all data on the channel,
1001 * but still allows waiting for incoming data from the remote node.
1003 * @param channel A handle for the channel.
1004 * @param direction Must be one of SHUT_RD, SHUT_WR or SHUT_RDWR.
1006 void channel_shutdown(channel *channel, int direction) {
1007 return meshlink_channel_shutdown(handle, channel, direction);
1010 /// Close a reliable stream channel.
1011 /** This informs the remote node that the local node has finished sending all data on the channel.
1012 * It also causes the local node to stop accepting incoming data from the remote node.
1013 * Afterwards, the channel handle is invalid and must not be used any more.
1015 * It is allowed to call this function at any time on a valid handle, even inside callback functions.
1016 * If called with a valid handle, this function always succeeds, otherwise the result is undefined.
1018 * @param channel A handle for the channel.
1020 void channel_close(meshlink_channel_t *channel) {
1021 return meshlink_channel_close(handle, channel);
1024 /// Abort a reliable stream channel.
1025 /** This aborts a channel.
1026 * Data that was in the send and receive buffers is dropped, so potentially there is some data that
1027 * was sent on this channel that will not be received by the peer.
1028 * Afterwards, the channel handle is invalid and must not be used any more.
1030 * It is allowed to call this function at any time on a valid handle, even inside callback functions.
1031 * If called with a valid handle, this function always succeeds, otherwise the result is undefined.
1033 * @param channel A handle for the channel.
1035 void channel_abort(meshlink_channel_t *channel) {
1036 return meshlink_channel_abort(handle, channel);
1039 /// Transmit data on a channel
1040 /** This queues data to send to the remote node.
1042 * @param channel A handle for the channel.
1043 * @param data A pointer to a buffer containing data sent by the source.
1044 * @param len The length of the data.
1046 * @return The amount of data that was queued, which can be less than len, or a negative value in case of an error.
1047 * If MESHLINK_CHANNEL_NO_PARTIAL is set, then the result will either be len,
1048 * 0 if the buffer is currently too full, or -1 if len is too big even for an empty buffer.
1050 ssize_t channel_send(channel *channel, void *data, size_t len) {
1051 return meshlink_channel_send(handle, channel, data, len);
1054 /// Transmit data on a channel asynchronously
1055 /** This registers a buffer that will be used to send data to the remote node.
1056 * Multiple buffers can be registered, in which case data will be sent in the order the buffers were registered.
1057 * While there are still buffers with unsent data, the poll callback will not be called.
1059 * @param channel A handle for the channel.
1060 * @param data A pointer to a buffer containing data sent by the source, or NULL if there is no data to send.
1061 * After meshlink_channel_aio_send() returns, the buffer may not be modified or freed by the application
1062 * until the callback routine is called.
1063 * @param len The length of the data, or 0 if there is no data to send.
1064 * @param cb A pointer to the function which will be called when MeshLink has finished using the buffer.
1065 * @param priv A private pointer which was set by the application when submitting the buffer.
1067 * @return True if the buffer was enqueued, false otherwise.
1069 bool channel_aio_send(channel *channel, const void *data, size_t len, meshlink_aio_cb_t cb, void *priv) {
1070 return meshlink_channel_aio_send(handle, channel, data, len, cb, priv);
1073 /// Transmit data on a channel asynchronously from a filedescriptor
1074 /** This will read up to the specified length number of bytes from the given filedescriptor, and send it over the channel.
1075 * The callback may be returned early if there is an error reading from the filedescriptor.
1076 * While there is still with unsent data, the poll callback will not be called.
1078 * @param channel A handle for the channel.
1079 * @param fd A file descriptor from which data will be read.
1080 * @param len The length of the data, or 0 if there is no data to send.
1081 * @param cb A pointer to the function which will be called when MeshLink has finished using the filedescriptor.
1082 * @param priv A private pointer which was set by the application when submitting the buffer.
1084 * @return True if the buffer was enqueued, false otherwise.
1086 bool channel_aio_fd_send(channel *channel, int fd, size_t len, meshlink_aio_fd_cb_t cb, void *priv) {
1087 return meshlink_channel_aio_fd_send(handle, channel, fd, len, cb, priv);
1090 /// Receive data on a channel asynchronously
1091 /** This registers a buffer that will be filled with incoming channel data.
1092 * Multiple buffers can be registered, in which case data will be received in the order the buffers were registered.
1093 * While there are still buffers that have not been filled, the receive callback will not be called.
1095 * @param channel A handle for the channel.
1096 * @param data A pointer to a buffer that will be filled with incoming data.
1097 * After meshlink_channel_aio_receive() returns, the buffer may not be modified or freed by the application
1098 * until the callback routine is called.
1099 * @param len The length of the data.
1100 * @param cb A pointer to the function which will be called when MeshLink has finished using the buffer.
1101 * @param priv A private pointer which was set by the application when submitting the buffer.
1103 * @return True if the buffer was enqueued, false otherwise.
1105 bool channel_aio_receive(channel *channel, const void *data, size_t len, meshlink_aio_cb_t cb, void *priv) {
1106 return meshlink_channel_aio_receive(handle, channel, data, len, cb, priv);
1109 /// Receive data on a channel asynchronously and send it to a filedescriptor
1110 /** This will read up to the specified length number of bytes from the channel, and send it to the filedescriptor.
1111 * The callback may be returned early if there is an error writing to the filedescriptor.
1112 * While there is still unread data, the receive callback will not be called.
1114 * @param channel A handle for the channel.
1115 * @param fd A file descriptor to which data will be written.
1116 * @param len The length of the data.
1117 * @param cb A pointer to the function which will be called when MeshLink has finished using the filedescriptor.
1118 * @param priv A private pointer which was set by the application when submitting the buffer.
1120 * @return True if the buffer was enqueued, false otherwise.
1122 bool channel_aio_fd_receive(channel *channel, int fd, size_t len, meshlink_aio_fd_cb_t cb, void *priv) {
1123 return meshlink_channel_aio_fd_receive(handle, channel, fd, len, cb, priv);
1126 /// Get the amount of bytes in the send buffer.
1127 /** This returns the amount of bytes in the send buffer.
1128 * These bytes have not been received by the peer yet.
1130 * @param channel A handle for the channel.
1132 * @return The amount of un-ACKed bytes in the send buffer.
1134 size_t channel_get_sendq(channel *channel) {
1135 return meshlink_channel_get_sendq(handle, channel);
1138 /// Get the amount of bytes in the receive buffer.
1139 /** This returns the amount of bytes in the receive buffer.
1140 * These bytes have not been processed by the application yet.
1142 * @param channel A handle for the channel.
1144 * @return The amount of bytes in the receive buffer.
1146 size_t channel_get_recvq(channel *channel) {
1147 return meshlink_channel_get_recvq(handle, channel);
1150 /// Get the maximum segment size of a channel.
1151 /** This returns the amount of bytes that can be sent at once for channels with UDP semantics.
1153 * @param channel A handle for the channel.
1155 * @return The amount of bytes in the receive buffer.
1157 size_t channel_get_mss(channel *channel) {
1158 return meshlink_channel_get_mss(handle, channel);
1161 /// Enable or disable zeroconf discovery of local peers
1162 /** This controls whether zeroconf discovery using the Catta library will be
1163 * enabled to search for peers on the local network. By default, it is enabled.
1165 * @param enable Set to true to enable discovery, false to disable.
1167 void enable_discovery(bool enable = true) {
1168 meshlink_enable_discovery(handle, enable);
1171 /// Inform MeshLink that the local network configuration might have changed
1172 /** This is intended to be used when there is no way for MeshLink to get notifications of local network changes.
1173 * It forces MeshLink to scan all network interfaces for changes in up/down status and new/removed addresses,
1174 * and will immediately check if all connections to other nodes are still alive.
1176 void hint_network_change() {
1177 meshlink_hint_network_change(handle);
1180 /// Set device class timeouts
1181 /** This sets the ping interval and timeout for a given device class.
1183 * @param devclass The device class to update
1184 * @param pinginterval The interval between keepalive packets, in seconds. The default is 60.
1185 * @param pingtimeout The required time within which a peer should respond, in seconds. The default is 5.
1186 * The timeout must be smaller than the interval.
1188 void set_dev_class_timeouts(dev_class_t devclass, int pinginterval, int pingtimeout) {
1189 meshlink_set_dev_class_timeouts(handle, devclass, pinginterval, pingtimeout);
1192 /// Set device class fast retry period
1193 /** This sets the fast retry period for a given device class.
1194 * During this period after the last time the mesh becomes unreachable, connections are tried once a second.
1196 * @param devclass The device class to update
1197 * @param fast_retry_period The period during which fast connection retries are done. The default is 0.
1199 void set_dev_class_fast_retry_period(dev_class_t devclass, int fast_retry_period) {
1200 meshlink_set_dev_class_fast_retry_period(handle, devclass, fast_retry_period);
1203 /// Set device class maximum timeout
1204 /** This sets the maximum timeout for outgoing connection retries for a given device class.
1206 * @param devclass The device class to update
1207 * @param maxtimeout The maximum timeout between reconnection attempts, in seconds. The default is 900.
1209 void set_dev_class_maxtimeout(dev_class_t devclass, int maxtimeout) {
1210 meshlink_set_dev_class_maxtimeout(handle, devclass, maxtimeout);
1213 /// Set which order invitations are committed
1214 /** This determines in which order configuration files are written to disk during an invitation.
1215 * By default, the invitee saves the configuration to disk first, then the inviter.
1216 * By calling this function with @a inviter_commits_first set to true, the order is reversed.
1218 * @param inviter_commits_first If true, then the node that invited a peer will commit data to disk first.
1220 void set_inviter_commits_first(bool inviter_commits_first) {
1221 meshlink_set_inviter_commits_first(handle, inviter_commits_first);
1224 /// Set the URL used to discover the host's external address
1225 /** For generating invitation URLs, MeshLink can look up the externally visible address of the local node.
1226 * It does so by querying an external service. By default, this is http://meshlink.io/host.cgi.
1227 * Only URLs starting with http:// are supported.
1229 * @param url The URL to use for external address queries, or NULL to revert back to the default URL.
1231 void set_external_address_discovery_url(const char *url) {
1232 meshlink_set_external_address_discovery_url(handle, url);
1237 mesh(const mesh &) /* TODO: C++11: = delete */;
1238 void operator=(const mesh &) /* TODO: C++11: = delete */;
1240 /// static callback trampolines:
1241 static void receive_trampoline(meshlink_handle_t *handle, meshlink_node_t *source, const void *data, size_t length) {
1242 if(!(handle->priv)) {
1246 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
1247 that->receive(static_cast<node *>(source), data, length);
1250 static void node_status_trampoline(meshlink_handle_t *handle, meshlink_node_t *peer, bool reachable) {
1251 if(!(handle->priv)) {
1255 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
1256 that->node_status(static_cast<node *>(peer), reachable);
1259 static void node_pmtu_trampoline(meshlink_handle_t *handle, meshlink_node_t *peer, uint16_t pmtu) {
1260 if(!(handle->priv)) {
1264 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
1265 that->node_pmtu(static_cast<node *>(peer), pmtu);
1268 static void node_duplicate_trampoline(meshlink_handle_t *handle, meshlink_node_t *peer) {
1269 if(!(handle->priv)) {
1273 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
1274 that->node_duplicate(static_cast<node *>(peer));
1277 static void log_trampoline(meshlink_handle_t *handle, log_level_t level, const char *message) {
1278 if(!(handle->priv)) {
1282 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
1283 that->log(level, message);
1286 static void error_trampoline(meshlink_handle_t *handle, meshlink_errno_t meshlink_errno) {
1287 if(!(handle->priv)) {
1291 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
1292 that->error(meshlink_errno);
1295 static void blacklisted_trampoline(meshlink_handle_t *handle, meshlink_node_t *peer) {
1296 if(!(handle->priv)) {
1300 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
1301 that->blacklisted(static_cast<node *>(peer));
1304 static void connection_try_trampoline(meshlink_handle_t *handle, meshlink_node_t *peer) {
1305 if(!(handle->priv)) {
1309 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
1310 that->connection_try(static_cast<node *>(peer));
1313 static bool channel_listen_trampoline(meshlink_handle_t *handle, meshlink_node_t *node, uint16_t port) {
1314 if(!(handle->priv)) {
1318 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
1319 return that->channel_listen(static_cast<meshlink::node *>(node), port);
1322 static bool channel_accept_trampoline(meshlink_handle_t *handle, meshlink_channel *channel, uint16_t port, const void *data, size_t len) {
1323 if(!(handle->priv)) {
1327 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
1328 bool accepted = that->channel_accept(static_cast<meshlink::channel *>(channel), port, data, len);
1331 meshlink_set_channel_receive_cb(handle, channel, &channel_receive_trampoline);
1332 meshlink_set_channel_poll_cb(handle, channel, &channel_poll_trampoline);
1338 static void channel_receive_trampoline(meshlink_handle_t *handle, meshlink_channel *channel, const void *data, size_t len) {
1339 if(!(handle->priv)) {
1343 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
1344 that->channel_receive(static_cast<meshlink::channel *>(channel), data, len);
1347 static void channel_poll_trampoline(meshlink_handle_t *handle, meshlink_channel *channel, size_t len) {
1348 if(!(handle->priv)) {
1352 meshlink::mesh *that = static_cast<mesh *>(handle->priv);
1353 that->channel_poll(static_cast<meshlink::channel *>(channel), len);
1356 meshlink_handle_t *handle;
1359 static inline const char *strerror(errno_t err = meshlink_errno) {
1360 return meshlink_strerror(err);
1363 /// Destroy a MeshLink instance.
1364 /** This function remove all configuration files of a MeshLink instance. It should only be called when the application
1365 * does not have an open handle to this instance. Afterwards, a call to meshlink_open() will create a completely
1368 * @param confbase The directory in which MeshLink stores its configuration files.
1369 * After the function returns, the application is free to overwrite or free @a confbase @a.
1371 * @return This function will return true if the MeshLink instance was successfully destroyed, false otherwise.
1373 static inline bool destroy(const char *confbase) {
1374 return meshlink_destroy(confbase);