1 #ifndef MESHLINK_INTERNAL_H
2 #define MESHLINK_INTERNAL_H
5 meshlink_internal.h -- Internal parts of the public API.
6 Copyright (C) 2014-2019 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 #error You must not include both meshlink.h and meshlink_internal.h!
32 #include "meshlink_queue.h"
38 #define MAXSOCKETS 4 /* Probably overkill... */
40 static const char meshlink_invitation_label[] = "MeshLink invitation";
41 static const char meshlink_tcp_label[] = "MeshLink TCP";
42 static const char meshlink_udp_label[] = "MeshLink UDP";
44 #define MESHLINK_CONFIG_VERSION 1
45 #define MESHLINK_INVITATION_VERSION 1
48 struct CattaSServiceBrowser;
49 struct CattaSimplePoll;
50 struct CattaSEntryGroup;
52 typedef struct listen_socket_t {
59 typedef enum proxytype_t {
67 struct meshlink_open_params {
79 /// Device class traits
83 unsigned int min_connects;
84 unsigned int max_connects;
88 /// A handle for an instance of MeshLink.
89 struct meshlink_handle {
95 pthread_mutex_t mesh_mutex;
98 meshlink_log_cb_t log_cb;
99 meshlink_log_level_t log_level;
101 // The most important network-related members come first
103 listen_socket_t listen_socket[MAXSOCKETS];
105 meshlink_receive_cb_t receive_cb;
106 meshlink_queue_t outpacketqueue;
107 signal_t datafromapp;
109 hash_t *node_udp_cache;
111 struct splay_tree_t *nodes;
112 struct splay_tree_t *edges;
114 struct list_t *connections;
115 struct list_t *outgoings;
116 struct list_t *submeshes;
118 // Meta-connection-related members
119 struct splay_tree_t *past_request_tree;
120 timeout_t past_request_timeout;
122 int connection_burst;
123 int contradicting_add_edge;
124 int contradicting_del_edge;
126 time_t connection_burst_time;
127 time_t last_config_check;
128 time_t last_hard_try;
130 timeout_t periodictimer;
132 struct connection_t *everyone;
137 // Infrequently used callbacks
138 meshlink_node_status_cb_t node_status_cb;
139 meshlink_channel_accept_cb_t channel_accept_cb;
140 meshlink_node_duplicate_cb_t node_duplicate_cb;
141 meshlink_connection_try_cb_t connection_try_cb;
147 struct ecdsa *private_key;
148 struct ecdsa *invitation_key;
150 dev_class_t devclass;
152 int invitation_timeout;
156 dev_class_traits_t dev_class_traits[DEV_CLASS_COUNT];
160 bool default_blacklist;
161 bool discovery; // Whether Catta is enabled or not
172 pthread_mutex_t discovery_mutex;
173 pthread_cond_t discovery_cond;
175 bool discovery_threadstarted;
178 pthread_t discovery_thread;
179 struct CattaServer *catta_server;
180 struct CattaSServiceBrowser *catta_browser;
181 struct CattaSimplePoll *catta_poll;
182 struct CattaSEntryGroup *catta_group;
183 char *catta_servicetype;
184 unsigned int catta_interfaces;
186 // State used for meshlink_join()
188 char cookie[18], hash[18];
197 // Proxy configuration, currently not exposed.
202 proxytype_t proxytype;
205 /// A handle for a MeshLink node.
206 struct meshlink_node {
211 /// A handle for a node Sub-Mesh.
212 struct meshlink_submesh {
218 typedef struct meshlink_aio_buffer {
224 meshlink_aio_cb_t buffer;
225 meshlink_aio_fd_cb_t fd;
228 struct meshlink_aio_buffer *next;
229 } meshlink_aio_buffer_t;
232 struct meshlink_channel {
236 struct utcp_connection *c;
237 meshlink_aio_buffer_t *aio_send;
238 meshlink_aio_buffer_t *aio_receive;
239 meshlink_channel_receive_cb_t receive_cb;
240 meshlink_channel_poll_cb_t poll_cb;
243 /// Header for data packets routed between nodes
244 typedef struct meshlink_packethdr {
245 uint8_t destination[16];
247 } __attribute__((__packed__)) meshlink_packethdr_t;
249 extern void meshlink_send_from_queue(event_loop_t *el, meshlink_handle_t *mesh);
250 extern void update_node_status(meshlink_handle_t *mesh, struct node_t *n);
251 extern meshlink_log_level_t global_log_level;
252 extern meshlink_log_cb_t global_log_cb;
253 extern int check_port(meshlink_handle_t *mesh);
254 extern void handle_duplicate_node(meshlink_handle_t *mesh, struct node_t *n);
255 extern void handle_network_change(meshlink_handle_t *mesh, bool online);