+#ifndef MESHLINK_INTERNAL_H
+#define MESHLINK_INTERNAL_H
+
/*
meshlink_internal.h -- Internal parts of the public API.
- Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>
+ Copyright (C) 2014-2019 Guus Sliepen <guus@meshlink.io>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#ifndef MESHLINK_INTERNAL_H
-#define MESHLINK_INTERNAL_H
+#ifdef MESHLINK_H
+#error You must not include both meshlink.h and meshlink_internal.h!
+#endif
#include "system.h"
+#include "event.h"
+#include "hash.h"
#include "meshlink.h"
+#include "meshlink_queue.h"
+#include "sockaddr.h"
+#include "sptps.h"
+#include "xoshiro.h"
+
+#include <pthread.h>
+
+#define MAXSOCKETS 4 /* Probably overkill... */
+
+static const char meshlink_invitation_label[] = "MeshLink invitation";
+static const char meshlink_tcp_label[] = "MeshLink TCP";
+static const char meshlink_udp_label[] = "MeshLink UDP";
+
+#define MESHLINK_CONFIG_VERSION 2
+#define MESHLINK_INVITATION_VERSION 2
+
+struct CattaServer;
+struct CattaSServiceBrowser;
+struct CattaSimplePoll;
+struct CattaSEntryGroup;
+
+typedef struct listen_socket_t {
+ struct io_t tcp;
+ struct io_t udp;
+ sockaddr_t sa;
+ sockaddr_t broadcast_sa;
+ bool bindto;
+} listen_socket_t;
+
+typedef enum proxytype_t {
+ PROXY_NONE = 0,
+ PROXY_SOCKS4,
+ PROXY_SOCKS4A,
+ PROXY_SOCKS5,
+ PROXY_HTTP,
+} proxytype_t;
+
+struct meshlink_open_params {
+ char *confbase;
+ char *appname;
+ char *name;
+ dev_class_t devclass;
+
+ int netns;
+
+ const void *key;
+ size_t keylen;
+};
+
+/// Device class traits
+typedef struct {
+ int pinginterval;
+ int pingtimeout;
+ int fast_retry_period;
+ unsigned int min_connects;
+ unsigned int max_connects;
+ int edge_weight;
+} dev_class_traits_t;
/// A handle for an instance of MeshLink.
struct meshlink_handle {
- char *confbase;
+ // public members
char *name;
+ void *priv;
- meshlink_receive_cb_t receive_cb;
- meshlink_node_status_cb_t node_status_cb;
+ // private members
+ pthread_mutex_t mutex;
+ event_loop_t loop;
+ struct node_t *self;
meshlink_log_cb_t log_cb;
meshlink_log_level_t log_level;
- pthread_t thread;
- struct list_t *sockets;
+ // The most important network-related members come first
+ int reachable;
+ int listen_sockets;
+ listen_socket_t listen_socket[MAXSOCKETS];
- struct node_t *self;
+ meshlink_receive_cb_t receive_cb;
+ meshlink_queue_t outpacketqueue;
+ signal_t datafromapp;
+
+ hash_t *node_udp_cache;
- struct splay_tree_t *config;
- struct splay_tree_t *edges;
struct splay_tree_t *nodes;
+ struct splay_tree_t *edges;
+
+ struct list_t *connections;
+ struct list_t *outgoings;
+ struct list_t *submeshes;
+
+ // Meta-connection-related members
+ struct splay_tree_t *past_request_tree;
+ timeout_t past_request_timeout;
- struct list_t *outgoing_connections;
+ int connection_burst;
+ int contradicting_add_edge;
+ int contradicting_del_edge;
+ int sleeptime;
+ time_t connection_burst_time;
+ time_t last_config_check;
+ time_t last_hard_try;
+ time_t last_unreachable;
+ timeout_t pingtimer;
+ timeout_t periodictimer;
+
+ struct connection_t *everyone;
+ uint64_t prng_state[4];
+ uint32_t session_id;
+
+ int next_pit;
+ int pits[10];
+
+ // Infrequently used callbacks
+ meshlink_node_status_cb_t node_status_cb;
+ meshlink_node_pmtu_cb_t node_pmtu_cb;
+ meshlink_channel_accept_cb_t channel_accept_cb;
+ meshlink_node_duplicate_cb_t node_duplicate_cb;
+ meshlink_connection_try_cb_t connection_try_cb;
+ meshlink_error_cb_t error_cb;
+
+ // Mesh parameters
+ char *appname;
+ char *myport;
+
+ struct ecdsa *private_key;
+ struct ecdsa *invitation_key;
+
+ dev_class_t devclass;
+
+ int invitation_timeout;
+ int maxtimeout;
+ int udp_choice;
+
+ dev_class_traits_t dev_class_traits[DEV_CLASS_COUNT];
+
+ int netns;
+
+ bool default_blacklist;
+ bool discovery; // Whether Catta is enabled or not
+ bool inviter_commits_first;
+
+ // Configuration
+ char *confbase;
+ FILE *lockfile;
+ void *config_key;
+ char *external_address_url;
+ struct list_t *invitation_addresses;
+
+ // Thread management
+ pthread_t thread;
+ pthread_cond_t cond;
+ pthread_mutex_t discovery_mutex;
+ pthread_cond_t discovery_cond;
+ bool threadstarted;
+ bool discovery_threadstarted;
+
+ // Catta
+ pthread_t discovery_thread;
+ struct CattaServer *catta_server;
+ struct CattaSServiceBrowser *catta_browser;
+ struct CattaSimplePoll *catta_poll;
+ struct CattaSEntryGroup *catta_group;
+ char *catta_servicetype;
+ unsigned int catta_interfaces;
+
+ // Proxy configuration, currently not exposed.
+ char *proxyhost;
+ char *proxyport;
+ char *proxyuser;
+ char *proxypass;
+ proxytype_t proxytype;
};
/// A handle for a MeshLink node.
void *priv;
};
-#endif // MESHLINK_INTERNAL_H
+/// A handle for a node Sub-Mesh.
+struct meshlink_submesh {
+ const char *name;
+ void *priv;
+};
+
+/// An AIO buffer.
+typedef struct meshlink_aio_buffer {
+ const void *data;
+ int fd;
+ size_t len;
+ size_t done;
+ union {
+ meshlink_aio_cb_t buffer;
+ meshlink_aio_fd_cb_t fd;
+ } cb;
+ void *priv;
+ struct meshlink_aio_buffer *next;
+} meshlink_aio_buffer_t;
+
+/// A channel.
+struct meshlink_channel {
+ struct node_t *node;
+ void *priv;
+
+ struct utcp_connection *c;
+ meshlink_aio_buffer_t *aio_send;
+ meshlink_aio_buffer_t *aio_receive;
+ meshlink_channel_receive_cb_t receive_cb;
+ meshlink_channel_poll_cb_t poll_cb;
+};
+
+/// Header for data packets routed between nodes
+typedef struct meshlink_packethdr {
+ uint8_t destination[16];
+ uint8_t source[16];
+} __attribute__((__packed__)) meshlink_packethdr_t;
+
+extern void meshlink_send_from_queue(event_loop_t *loop, void *mesh);
+extern void update_node_status(meshlink_handle_t *mesh, struct node_t *n);
+extern void update_node_pmtu(meshlink_handle_t *mesh, struct node_t *n);
+extern meshlink_log_level_t global_log_level;
+extern meshlink_log_cb_t global_log_cb;
+extern void handle_duplicate_node(meshlink_handle_t *mesh, struct node_t *n);
+extern void handle_network_change(meshlink_handle_t *mesh, bool online);
+extern void call_error_cb(meshlink_handle_t *mesh, meshlink_errno_t meshlink_errno);
+
+/// Per-instance PRNG
+static inline int prng(meshlink_handle_t *mesh, uint64_t max) {
+ return xoshiro(mesh->prng_state) % max;
+}
+
+/// Fudge value of ~0.1 seconds, in microseconds.
+static const unsigned int TIMER_FUDGE = 0x20000;
+
+#endif
projects / meshlink / blobdiff