#define VAR_MULTIPLE 4 /* Multiple statements allowed */
#define VAR_OBSOLETE 8 /* Should not be used anymore */
#define VAR_SAFE 16 /* Variable is safe when accepting invitations */
+#define MAX_ADDRESS_LENGTH 45 /* Max length of an (IPv6) address */
+#define MAX_PORT_LENGTH 5 /* 0-65535 */
typedef struct {
const char *name;
int type;
#include "crypto.h"
#include "ecdsagen.h"
+#include "logger.h"
#include "meshlink_internal.h"
#include "netutl.h"
#include "node.h"
#include "utils.h"
#include "xalloc.h"
#include "ed25519/sha512.h"
+#include "discovery.h"
#ifndef MSG_NOSIGNAL
#define MSG_NOSIGNAL 0
#endif
+__thread meshlink_errno_t meshlink_errno;
+meshlink_log_cb_t global_log_cb;
+meshlink_log_level_t global_log_level;
+
//TODO: this can go away completely
const var_t variables[] = {
/* Server configuration */
static bool fcopy(FILE *out, const char *filename) {
FILE *in = fopen(filename, "r");
if(!in) {
- fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno));
+ logger(NULL, MESHLINK_ERROR, "Could not open %s: %s\n", filename, strerror(errno));
return false;
}
goto done;
// If that doesn't work, guess externally visible hostname
- fprintf(stderr, "Trying to discover externally visible hostname...\n");
+ logger(mesh, MESHLINK_DEBUG, "Trying to discover externally visible hostname...\n");
struct addrinfo *ai = str2addrinfo("meshlink.io", "80", SOCK_STREAM);
struct addrinfo *aip = ai;
- static const char request[] = "GET http://meshlink.io/host.cgi HTTP/1.0\r\n\r\n";
+ static const char request[] = "GET http://www.meshlink.io/host.cgi HTTP/1.0\r\n\r\n";
while(aip) {
int s = socket(aip->ai_family, aip->ai_socktype, aip->ai_protocol);
fprintf(f, "\nAddress = %s\n", hostname);
fclose(f);
} else {
- fprintf(stderr, "Could not append Address to %s: %s\n", filename, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not append Address to %s: %s\n", filename, strerror(errno));
}
done:
const char *end = strchr(*data, '\n');
size_t len = end ? end - *data : strlen(*data);
if(len >= sizeof line) {
- fprintf(stderr, "Maximum line length exceeded!\n");
+ logger(NULL, MESHLINK_ERROR, "Maximum line length exceeded!\n");
return NULL;
}
if(len && !isprint(**data))
while(ai) {
int fd = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
- if(!fd)
+ if(!fd) {
+ freeaddrinfo(ai);
return false;
+ }
int result = bind(fd, ai->ai_addr, ai->ai_addrlen);
closesocket(fd);
- if(result)
+ if(result) {
+ freeaddrinfo(ai);
return false;
+ }
ai = ai->ai_next;
}
+ freeaddrinfo(ai);
return true;
}
static int check_port(meshlink_handle_t *mesh) {
- if(try_bind(655))
- return 655;
-
- fprintf(stderr, "Warning: could not bind to port 655.\n");
-
- for(int i = 0; i < 100; i++) {
+ for(int i = 0; i < 1000; i++) {
int port = 0x1000 + (rand() & 0x7fff);
if(try_bind(port)) {
char filename[PATH_MAX];
snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, mesh->name);
FILE *f = fopen(filename, "a");
if(!f) {
- fprintf(stderr, "Please change MeshLink's Port manually.\n");
+ logger(mesh, MESHLINK_DEBUG, "Please change MeshLink's Port manually.\n");
return 0;
}
fprintf(f, "Port = %d\n", port);
fclose(f);
- fprintf(stderr, "MeshLink will instead listen on port %d.\n", port);
return port;
}
}
- fprintf(stderr, "Please change MeshLink's Port manually.\n");
+ logger(mesh, MESHLINK_DEBUG, "Please change MeshLink's Port manually.\n");
return 0;
}
static bool finalize_join(meshlink_handle_t *mesh) {
char *name = xstrdup(get_value(mesh->data, "Name"));
if(!name) {
- fprintf(stderr, "No Name found in invitation!\n");
+ logger(mesh, MESHLINK_DEBUG, "No Name found in invitation!\n");
return false;
}
if(!check_id(name)) {
- fprintf(stderr, "Invalid Name found in invitation: %s!\n", name);
+ logger(mesh, MESHLINK_DEBUG, "Invalid Name found in invitation: %s!\n", name);
return false;
}
FILE *f = fopen(filename, "w");
if(!f) {
- fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not create file %s: %s\n", filename, strerror(errno));
return false;
}
snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, name);
FILE *fh = fopen(filename, "w");
if(!fh) {
- fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not create file %s: %s\n", filename, strerror(errno));
fclose(f);
return false;
}
// Ignore unknown and unsafe variables
if(!found) {
- fprintf(stderr, "Ignoring unknown variable '%s' in invitation.\n", l);
+ logger(mesh, MESHLINK_DEBUG, "Ignoring unknown variable '%s' in invitation.\n", l);
continue;
} else if(!(variables[i].type & VAR_SAFE)) {
- fprintf(stderr, "Ignoring unsafe variable '%s' in invitation.\n", l);
+ logger(mesh, MESHLINK_DEBUG, "Ignoring unsafe variable '%s' in invitation.\n", l);
continue;
}
while(l && !strcasecmp(l, "Name")) {
if(!check_id(value)) {
- fprintf(stderr, "Invalid Name found in invitation.\n");
+ logger(mesh, MESHLINK_DEBUG, "Invalid Name found in invitation.\n");
return false;
}
if(!strcmp(value, name)) {
- fprintf(stderr, "Secondary chunk would overwrite our own host config file.\n");
+ logger(mesh, MESHLINK_DEBUG, "Secondary chunk would overwrite our own host config file.\n");
return false;
}
f = fopen(filename, "w");
if(!f) {
- fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not create file %s: %s\n", filename, strerror(errno));
return false;
}
}
char *b64key = ecdsa_get_base64_public_key(mesh->self->connection->ecdsa);
- if(!b64key)
+ if(!b64key) {
+ fclose(fh);
return false;
+ }
fprintf(fh, "ECDSAPublicKey = %s\n", b64key);
fprintf(fh, "Port = %s\n", mesh->myport);
free(mesh->self->name);
free(mesh->self->connection->name);
mesh->self->name = xstrdup(name);
- mesh->self->connection->name = xstrdup(name);
+ mesh->self->connection->name = name;
- fprintf(stderr, "Configuration stored in: %s\n", mesh->confbase);
+ logger(mesh, MESHLINK_DEBUG, "Configuration stored in: %s\n", mesh->confbase);
load_all_nodes(mesh);
break;
case 1:
+ mesh->thedatalen = 0;
return finalize_join(mesh);
case 2:
- fprintf(stderr, "Invitation succesfully accepted.\n");
+ logger(mesh, MESHLINK_DEBUG, "Invitation succesfully accepted.\n");
shutdown(mesh->sock, SHUT_RDWR);
mesh->success = true;
break;
static const char *errstr[] = {
[MESHLINK_OK] = "No error",
+ [MESHLINK_EINVAL] = "Invalid argument",
[MESHLINK_ENOMEM] = "Out of memory",
[MESHLINK_ENOENT] = "No such node",
+ [MESHLINK_EEXIST] = "Node already exists",
+ [MESHLINK_EINTERNAL] = "Internal error",
+ [MESHLINK_ERESOLV] = "Could not resolve hostname",
+ [MESHLINK_ESTORAGE] = "Storage error",
+ [MESHLINK_ENETWORK] = "Network error",
+ [MESHLINK_EPEER] = "Error communicating with peer",
};
-const char *meshlink_strerror(meshlink_errno_t errno) {
- return errstr[errno];
+const char *meshlink_strerror(meshlink_errno_t err) {
+ if(err < 0 || err >= sizeof errstr / sizeof *errstr)
+ return "Invalid error code";
+ return errstr[err];
}
static bool ecdsa_keygen(meshlink_handle_t *mesh) {
FILE *f;
char pubname[PATH_MAX], privname[PATH_MAX];
- fprintf(stderr, "Generating ECDSA keypair:\n");
+ logger(mesh, MESHLINK_DEBUG, "Generating ECDSA keypair:\n");
if(!(key = ecdsa_generate())) {
- fprintf(stderr, "Error during key generation!\n");
+ logger(mesh, MESHLINK_DEBUG, "Error during key generation!\n");
+ meshlink_errno = MESHLINK_EINTERNAL;
return false;
} else
- fprintf(stderr, "Done.\n");
+ logger(mesh, MESHLINK_DEBUG, "Done.\n");
snprintf(privname, sizeof privname, "%s" SLASH "ecdsa_key.priv", mesh->confbase);
f = fopen(privname, "w");
- if(!f)
+ if(!f) {
+ meshlink_errno = MESHLINK_ESTORAGE;
return false;
+ }
#ifdef HAVE_FCHMOD
fchmod(fileno(f), 0600);
#endif
if(!ecdsa_write_pem_private_key(key, f)) {
- fprintf(stderr, "Error writing private key!\n");
+ logger(mesh, MESHLINK_DEBUG, "Error writing private key!\n");
ecdsa_free(key);
fclose(f);
+ meshlink_errno = MESHLINK_EINTERNAL;
return false;
}
fclose(f);
-
snprintf(pubname, sizeof pubname, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, mesh->name);
f = fopen(pubname, "a");
- if(!f)
+ if(!f) {
+ meshlink_errno = MESHLINK_ESTORAGE;
return false;
+ }
char *pubkey = ecdsa_get_base64_public_key(key);
fprintf(f, "ECDSAPublicKey = %s\n", pubkey);
static bool meshlink_setup(meshlink_handle_t *mesh) {
if(mkdir(mesh->confbase, 0777) && errno != EEXIST) {
- fprintf(stderr, "Could not create directory %s: %s\n", mesh->confbase, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not create directory %s: %s\n", mesh->confbase, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
return false;
}
snprintf(filename, sizeof filename, "%s" SLASH "hosts", mesh->confbase);
if(mkdir(filename, 0777) && errno != EEXIST) {
- fprintf(stderr, "Could not create directory %s: %s\n", filename, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not create directory %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
return false;
}
snprintf(filename, sizeof filename, "%s" SLASH "meshlink.conf", mesh->confbase);
if(!access(filename, F_OK)) {
- fprintf(stderr, "Configuration file %s already exists!\n", filename);
+ logger(mesh, MESHLINK_DEBUG, "Configuration file %s already exists!\n", filename);
+ meshlink_errno = MESHLINK_EEXIST;
return false;
}
FILE *f = fopen(filename, "w");
if(!f) {
- fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
- return 1;
+ logger(mesh, MESHLINK_DEBUG, "Could not create file %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ return false;
}
fprintf(f, "Name = %s\n", mesh->name);
fclose(f);
- if(!ecdsa_keygen(mesh))
+ if(!ecdsa_keygen(mesh)) {
+ meshlink_errno = MESHLINK_EINTERNAL;
return false;
+ }
check_port(mesh);
return true;
}
-meshlink_handle_t *meshlink_open(const char *confbase, const char *name) {
+meshlink_handle_t *meshlink_open(const char *confbase, const char *name, const char* appname, dev_class_t devclass) {
+ return meshlink_open_with_size(confbase, name, appname, devclass, sizeof(meshlink_handle_t));
+}
+
+meshlink_handle_t *meshlink_open_with_size(const char *confbase, const char *name, const char* appname, dev_class_t devclass, size_t size) {
+
// Validate arguments provided by the application
bool usingname = false;
+
+ logger(NULL, MESHLINK_DEBUG, "meshlink_open called\n");
if(!confbase || !*confbase) {
- fprintf(stderr, "No confbase given!\n");
+ logger(NULL, MESHLINK_ERROR, "No confbase given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ if(!appname || !*appname) {
+ logger(NULL, MESHLINK_ERROR, "No appname given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
return NULL;
}
if(!name || !*name) {
- fprintf(stderr, "No name given!\n");
+ logger(NULL, MESHLINK_ERROR, "No name given!\n");
//return NULL;
}
else { //check name only if there is a name != NULL
if(!check_id(name)) {
- fprintf(stderr, "Invalid name given!\n");
+ logger(NULL, MESHLINK_ERROR, "Invalid name given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
return NULL;
} else { usingname = true;}
}
- meshlink_handle_t *mesh = xzalloc(sizeof *mesh);
+ if(devclass < 0 || devclass > _DEV_CLASS_MAX) {
+ logger(NULL, MESHLINK_ERROR, "Invalid devclass given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ meshlink_handle_t *mesh = xzalloc(size);
mesh->confbase = xstrdup(confbase);
+ mesh->appname = xstrdup(appname);
+ mesh->devclass = devclass;
if (usingname) mesh->name = xstrdup(name);
- pthread_mutex_init ( &(mesh->outpacketqueue_mutex), NULL);
- pthread_mutex_init ( &(mesh->nodes_mutex), NULL);
+
+ // initialize mutex
+ pthread_mutexattr_t attr;
+ pthread_mutexattr_init(&attr);
+ pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+ pthread_mutex_init(&(mesh->mesh_mutex), &attr);
+
mesh->threadstarted = false;
event_loop_init(&mesh->loop);
mesh->loop.data = mesh;
- // TODO: should be set by a function.
- mesh->debug_level = 5;
-
// Check whether meshlink.conf already exists
char filename[PATH_MAX];
if(access(filename, R_OK)) {
if(errno == ENOENT) {
// If not, create it
- meshlink_setup(mesh);
+ if(!meshlink_setup(mesh)) {
+ // meshlink_errno is set by meshlink_setup()
+ return NULL;
+ }
} else {
- fprintf(stderr, "Cannot not read from %s: %s\n", filename, strerror(errno));
- return meshlink_close(mesh), NULL;
+ logger(NULL, MESHLINK_ERROR, "Cannot not read from %s: %s\n", filename, strerror(errno));
+ meshlink_close(mesh);
+ meshlink_errno = MESHLINK_ESTORAGE;
+ return NULL;
}
}
init_configuration(&mesh->config);
- if(!read_server_config(mesh))
- return meshlink_close(mesh), NULL;
+ if(!read_server_config(mesh)) {
+ meshlink_close(mesh);
+ meshlink_errno = MESHLINK_ESTORAGE;
+ return NULL;
+ };
#ifdef HAVE_MINGW
struct WSAData wsa_state;
// Setup up everything
// TODO: we should not open listening sockets yet
- if(!setup_network(mesh))
- return meshlink_close(mesh), NULL;
+ if(!setup_network(mesh)) {
+ meshlink_close(mesh);
+ meshlink_errno = MESHLINK_ENETWORK;
+ return NULL;
+ }
+ logger(NULL, MESHLINK_DEBUG, "meshlink_open returning\n");
return mesh;
}
-void *meshlink_main_loop(void *arg) {
+static void *meshlink_main_loop(void *arg) {
meshlink_handle_t *mesh = arg;
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
try_outgoing_connections(mesh);
+ logger(mesh, MESHLINK_DEBUG, "Starting main_loop...\n");
main_loop(mesh);
+ logger(mesh, MESHLINK_DEBUG, "main_loop returned.\n");
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return NULL;
}
bool meshlink_start(meshlink_handle_t *mesh) {
+ if(!mesh) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ logger(mesh, MESHLINK_DEBUG, "meshlink_start called\n");
+
+ mesh->thedatalen = 0;
+
// TODO: open listening sockets first
//Check that a valid name is set
if(!mesh->name ) {
- fprintf(stderr, "No name given!\n");
+ logger(mesh, MESHLINK_DEBUG, "No name given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
// Start the main thread
if(pthread_create(&mesh->thread, NULL, meshlink_main_loop, mesh) != 0) {
- fprintf(stderr, "Could not start thread: %s\n", strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not start thread: %s\n", strerror(errno));
memset(&mesh->thread, 0, sizeof mesh->thread);
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
mesh->threadstarted=true;
+ discovery_start(mesh);
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return true;
}
void meshlink_stop(meshlink_handle_t *mesh) {
- // Shut down the listening sockets to signal the main thread to shut down
-
- for(int i = 0; i < mesh->listen_sockets; i++) {
- shutdown(mesh->listen_socket[i].tcp.fd, SHUT_RDWR);
- shutdown(mesh->listen_socket[i].udp.fd, SHUT_RDWR);
+ if(!mesh) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return;
}
- // Wait for the main thread to finish
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+ logger(mesh, MESHLINK_DEBUG, "meshlink_stop called\n");
+
+ // Stop discovery
+ discovery_stop(mesh);
+ // Shut down a listening socket to signal the main thread to shut down
+
+ listen_socket_t *s = &mesh->listen_socket[0];
+ shutdown(s->tcp.fd, SHUT_RDWR);
+
+ // Wait for the main thread to finish
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
pthread_join(mesh->thread, NULL);
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ mesh->threadstarted = false;
+
+ // Fix the socket
+
+ closesocket(s->tcp.fd);
+ io_del(&mesh->loop, &s->tcp);
+ s->tcp.fd = setup_listen_socket(&s->sa);
+ if(s->tcp.fd < 0)
+ logger(mesh, MESHLINK_ERROR, "Could not repair listenen socket!");
+ else
+ io_add(&mesh->loop, &s->tcp, handle_new_meta_connection, s, s->tcp.fd, IO_READ);
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
}
void meshlink_close(meshlink_handle_t *mesh) {
+ if(!mesh || !mesh->confbase) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return;
+ }
+
+ // lock is not released after this
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
// Close and free all resources used.
close_network_connections(mesh);
- logger(DEBUG_ALWAYS, LOG_NOTICE, "Terminating");
+ logger(mesh, MESHLINK_INFO, "Terminating");
exit_configuration(&mesh->config);
event_loop_exit(&mesh->loop);
- free(mesh);
-
#ifdef HAVE_MINGW
- WSACleanup();
+ if(mesh->confbase)
+ WSACleanup();
#endif
+
+ ecdsa_free(mesh->invitation_key);
+
+ free(mesh->name);
+ free(mesh->appname);
+ free(mesh->confbase);
+ pthread_mutex_destroy(&(mesh->mesh_mutex));
+
+ memset(mesh, 0, sizeof *mesh);
+
+ free(mesh);
}
void meshlink_set_receive_cb(meshlink_handle_t *mesh, meshlink_receive_cb_t cb) {
+ if(!mesh) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
mesh->receive_cb = cb;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
}
void meshlink_set_node_status_cb(meshlink_handle_t *mesh, meshlink_node_status_cb_t cb) {
+ if(!mesh) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
mesh->node_status_cb = cb;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
}
void meshlink_set_log_cb(meshlink_handle_t *mesh, meshlink_log_level_t level, meshlink_log_cb_t cb) {
- mesh->log_cb = cb;
- mesh->log_level = level;
+ if(mesh) {
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+ mesh->log_cb = cb;
+ mesh->log_level = cb ? level : 0;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ } else {
+ global_log_cb = cb;
+ global_log_level = cb ? level : 0;
+ }
}
-bool meshlink_send(meshlink_handle_t *mesh, meshlink_node_t *destination, const void *data, unsigned int len) {
+bool meshlink_send(meshlink_handle_t *mesh, meshlink_node_t *destination, const void *data, size_t len) {
+ if(!mesh || !destination) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
- /* If there is no outgoing list yet, create one. */
+ if(!len)
+ return true;
- if(!mesh->outpacketqueue)
- mesh->outpacketqueue = list_alloc(NULL);
+ if(!data) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
//add packet to the queue
outpacketqueue_t *packet_in_queue = xzalloc(sizeof *packet_in_queue);
packet_in_queue->destination=destination;
packet_in_queue->data=data;
packet_in_queue->len=len;
- pthread_mutex_lock(&(mesh->outpacketqueue_mutex));
- list_insert_head(mesh->outpacketqueue,packet_in_queue);
- pthread_mutex_unlock(&(mesh->outpacketqueue_mutex));
+ if(!meshlink_queue_push(&mesh->outpacketqueue, packet_in_queue)) {
+ free(packet_in_queue);
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
//notify event loop
signal_trigger(&(mesh->loop),&(mesh->datafromapp));
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return true;
}
void meshlink_send_from_queue(event_loop_t* el,meshlink_handle_t *mesh) {
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
vpn_packet_t packet;
meshlink_packethdr_t *hdr = (meshlink_packethdr_t *)packet.data;
- outpacketqueue_t* p = list_get_tail(mesh->outpacketqueue);
- if (p)
- list_delete_tail(mesh->outpacketqueue);
- else return ;
+ outpacketqueue_t* p = meshlink_queue_pop(&mesh->outpacketqueue);
+ if(!p)
+ {
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return;
+ }
if (sizeof(meshlink_packethdr_t) + p->len > MAXSIZE) {
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
//log something
- return ;
+ return;
}
packet.probe = false;
mesh->self->in_packets++;
mesh->self->in_bytes += packet.len;
route(mesh, mesh->self, &packet);
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return ;
}
+ssize_t meshlink_get_pmtu(meshlink_handle_t *mesh, meshlink_node_t *destination) {
+ if(!mesh || !destination) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return -1;
+ }
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ node_t *n = (node_t *)destination;
+ if(!n->status.reachable) {
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return 0;
+
+ }
+ else if(n->mtuprobes > 30 && n->minmtu) {
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return n->minmtu;
+ }
+ else {
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return MTU;
+ }
+}
+
+char *meshlink_get_fingerprint(meshlink_handle_t *mesh, meshlink_node_t *node) {
+ if(!mesh || !node) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ node_t *n = (node_t *)node;
+
+ if(!node_read_ecdsa_public_key(mesh, n) || !n->ecdsa) {
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+
+ char *fingerprint = ecdsa_get_base64_public_key(n->ecdsa);
+
+ if(!fingerprint)
+ meshlink_errno = MESHLINK_EINTERNAL;
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return fingerprint;
+}
+
meshlink_node_t *meshlink_get_node(meshlink_handle_t *mesh, const char *name) {
- return (meshlink_node_t *)lookup_node(mesh, (char *)name); // TODO: make lookup_node() use const
+ if(!mesh || !name) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ meshlink_node_t *node = NULL;
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+ node = (meshlink_node_t *)lookup_node(mesh, (char *)name); // TODO: make lookup_node() use const
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return node;
}
-size_t meshlink_get_all_nodes(meshlink_handle_t *mesh, meshlink_node_t **nodes, size_t nmemb) {
- size_t i = 0;
+meshlink_node_t **meshlink_get_all_nodes(meshlink_handle_t *mesh, meshlink_node_t **nodes, size_t *nmemb) {
+ if(!mesh || !nmemb || (*nmemb && !nodes)) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ meshlink_node_t **result;
//lock mesh->nodes
- pthread_mutex_lock(&(mesh->nodes_mutex));
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ *nmemb = mesh->nodes->count;
+ result = realloc(nodes, *nmemb * sizeof *nodes);
- for splay_each(node_t, n, mesh->nodes) {
- if(i < nmemb)
- nodes[i] = (meshlink_node_t *)n;
- i++;
+ if(result) {
+ meshlink_node_t **p = result;
+ for splay_each(node_t, n, mesh->nodes)
+ *p++ = (meshlink_node_t *)n;
+ } else {
+ *nmemb = 0;
+ free(nodes);
+ meshlink_errno = MESHLINK_ENOMEM;
}
- pthread_mutex_unlock(&(mesh->nodes_mutex));
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
- return i;
+ return result;
}
bool meshlink_sign(meshlink_handle_t *mesh, const void *data, size_t len, void *signature, size_t *siglen) {
- if(*siglen < MESHLINK_SIGLEN)
+ if(!mesh || !data || !len || !signature || !siglen) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ if(*siglen < MESHLINK_SIGLEN) {
+ meshlink_errno = MESHLINK_EINVAL;
return false;
- if(!ecdsa_sign(mesh->self->connection->ecdsa, data, len, signature))
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ if(!ecdsa_sign(mesh->self->connection->ecdsa, data, len, signature)) {
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
+ }
+
*siglen = MESHLINK_SIGLEN;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return true;
}
bool meshlink_verify(meshlink_handle_t *mesh, meshlink_node_t *source, const void *data, size_t len, const void *signature, size_t siglen) {
- if(siglen != MESHLINK_SIGLEN)
+ if(!mesh || !data || !len || !signature) {
+ meshlink_errno = MESHLINK_EINVAL;
return false;
+ }
+
+ if(siglen != MESHLINK_SIGLEN) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ bool rval = false;
+
struct node_t *n = (struct node_t *)source;
node_read_ecdsa_public_key(mesh, n);
- if(!n->ecdsa)
- return false;
- return ecdsa_verify(((struct node_t *)source)->ecdsa, data, len, signature);
+ if(!n->ecdsa) {
+ meshlink_errno = MESHLINK_EINTERNAL;
+ rval = false;
+ } else {
+ rval = ecdsa_verify(((struct node_t *)source)->ecdsa, data, len, signature);
+ }
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return rval;
}
static bool refresh_invitation_key(meshlink_handle_t *mesh) {
char filename[PATH_MAX];
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
snprintf(filename, sizeof filename, "%s" SLASH "invitations", mesh->confbase);
if(mkdir(filename, 0700) && errno != EEXIST) {
- fprintf(stderr, "Could not create directory %s: %s\n", filename, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not create directory %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
// Count the number of valid invitations, clean up old ones
DIR *dir = opendir(filename);
if(!dir) {
- fprintf(stderr, "Could not read directory %s: %s\n", filename, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not read directory %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
else
unlink(invname);
} else {
- fprintf(stderr, "Could not stat %s: %s\n", invname, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not stat %s: %s\n", invname, strerror(errno));
errno = 0;
}
}
if(errno) {
- fprintf(stderr, "Error while reading directory %s: %s\n", filename, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Error while reading directory %s: %s\n", filename, strerror(errno));
closedir(dir);
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
}
}
- if(mesh->invitation_key)
+ if(mesh->invitation_key) {
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return true;
+ }
// Create a new key if necessary.
FILE *f = fopen(filename, "r");
if(!f) {
if(errno != ENOENT) {
- fprintf(stderr, "Could not read %s: %s\n", filename, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not read %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
mesh->invitation_key = ecdsa_generate();
if(!mesh->invitation_key) {
- fprintf(stderr, "Could not generate a new key!\n");
+ logger(mesh, MESHLINK_DEBUG, "Could not generate a new key!\n");
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
f = fopen(filename, "w");
if(!f) {
- fprintf(stderr, "Could not write %s: %s\n", filename, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not write %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
chmod(filename, 0600);
} else {
mesh->invitation_key = ecdsa_read_pem_private_key(f);
fclose(f);
- if(!mesh->invitation_key)
- fprintf(stderr, "Could not read private key from %s\n", filename);
+ if(!mesh->invitation_key) {
+ logger(mesh, MESHLINK_DEBUG, "Could not read private key from %s\n", filename);
+ meshlink_errno = MESHLINK_ESTORAGE;
+ }
}
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return mesh->invitation_key;
}
bool meshlink_add_address(meshlink_handle_t *mesh, const char *address) {
+ if(!mesh || !address) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ bool rval = false;
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
for(const char *p = address; *p; p++) {
if(isalnum(*p) || *p == '-' || *p == '.' || *p == ':')
continue;
- fprintf(stderr, "Invalid character in address: %s\n", address);
+ logger(mesh, MESHLINK_DEBUG, "Invalid character in address: %s\n", address);
+ meshlink_errno = MESHLINK_EINVAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
- return append_config_file(mesh, mesh->self->name, "Address", address);
+ rval = append_config_file(mesh, mesh->self->name, "Address", address);
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return rval;
}
char *meshlink_invite(meshlink_handle_t *mesh, const char *name) {
+ if(!mesh) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
// Check validity of the new node's name
if(!check_id(name)) {
- fprintf(stderr, "Invalid name for node.\n");
+ logger(mesh, MESHLINK_DEBUG, "Invalid name for node.\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return NULL;
}
char filename[PATH_MAX];
snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, name);
if(!access(filename, F_OK)) {
- fprintf(stderr, "A host config file for %s already exists!\n", name);
+ logger(mesh, MESHLINK_DEBUG, "A host config file for %s already exists!\n", name);
+ meshlink_errno = MESHLINK_EEXIST;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return NULL;
}
// Ensure no other nodes know about this name
if(meshlink_get_node(mesh, name)) {
- fprintf(stderr, "A node with name %s is already known!\n", name);
+ logger(mesh, MESHLINK_DEBUG, "A node with name %s is already known!\n", name);
+ meshlink_errno = MESHLINK_EEXIST;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return NULL;
}
// Get the local address
char *address = get_my_hostname(mesh);
if(!address) {
- fprintf(stderr, "No Address known for ourselves!\n");
+ logger(mesh, MESHLINK_DEBUG, "No Address known for ourselves!\n");
+ meshlink_errno = MESHLINK_ERESOLV;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return NULL;
}
- if(!refresh_invitation_key(mesh))
+ if(!refresh_invitation_key(mesh)) {
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return NULL;
+ }
char hash[64];
b64encode_urlsafe(cookie, cookie, 18);
+ free(fingerprint);
+
// Create a file containing the details of the invitation.
snprintf(filename, sizeof filename, "%s" SLASH "invitations" SLASH "%s", mesh->confbase, cookiehash);
int ifd = open(filename, O_RDWR | O_CREAT | O_EXCL, 0600);
if(!ifd) {
- fprintf(stderr, "Could not create invitation file %s: %s\n", filename, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not create invitation file %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return NULL;
}
FILE *f = fdopen(ifd, "w");
}
fclose(tc);
} else {
- fprintf(stderr, "Could not create %s: %s\n", filename, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not create %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return NULL;
}
// Create an URL from the local address, key hash and cookie
char *url;
xasprintf(&url, "%s/%s%s", address, hash, cookie);
+ free(address);
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return url;
}
bool meshlink_join(meshlink_handle_t *mesh, const char *invitation) {
+ if(!mesh || !invitation) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
//TODO: think of a better name for this variable, or of a different way to tokenize the invitation URL.
char copy[strlen(invitation) + 1];
strcpy(copy, invitation);
}
if(!port)
- port = "655";
+ goto invalid;
if(!b64decode(slash, mesh->hash, 18) || !b64decode(slash + 24, mesh->cookie, 18))
goto invalid;
// Generate a throw-away key for the invitation.
ecdsa_t *key = ecdsa_generate();
- if(!key)
+ if(!key) {
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
+ }
char *b64key = ecdsa_get_base64_public_key(key);
// Connect to the meshlink daemon mentioned in the URL.
struct addrinfo *ai = str2addrinfo(address, port, SOCK_STREAM);
- if(!ai)
+ if(!ai) {
+ meshlink_errno = MESHLINK_ERESOLV;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
+ }
mesh->sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
if(mesh->sock <= 0) {
- fprintf(stderr, "Could not open socket: %s\n", strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not open socket: %s\n", strerror(errno));
+ freeaddrinfo(ai);
+ meshlink_errno = MESHLINK_ENETWORK;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
if(connect(mesh->sock, ai->ai_addr, ai->ai_addrlen)) {
- fprintf(stderr, "Could not connect to %s port %s: %s\n", address, port, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not connect to %s port %s: %s\n", address, port, strerror(errno));
closesocket(mesh->sock);
+ freeaddrinfo(ai);
+ meshlink_errno = MESHLINK_ENETWORK;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
- fprintf(stderr, "Connected to %s port %s...\n", address, port);
+ freeaddrinfo(ai);
+
+ logger(mesh, MESHLINK_DEBUG, "Connected to %s port %s...\n", address, port);
// Tell him we have an invitation, and give him our throw-away key.
mesh->blen = 0;
if(!sendline(mesh->sock, "0 ?%s %d.%d", b64key, PROT_MAJOR, 1)) {
- fprintf(stderr, "Error sending request to %s port %s: %s\n", address, port, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Error sending request to %s port %s: %s\n", address, port, strerror(errno));
closesocket(mesh->sock);
+ meshlink_errno = MESHLINK_ENETWORK;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
+ free(b64key);
+
char hisname[4096] = "";
int code, hismajor, hisminor = 0;
if(!recvline(mesh, sizeof mesh->line) || sscanf(mesh->line, "%d %s %d.%d", &code, hisname, &hismajor, &hisminor) < 3 || code != 0 || hismajor != PROT_MAJOR || !check_id(hisname) || !recvline(mesh, sizeof mesh->line) || !rstrip(mesh->line) || sscanf(mesh->line, "%d ", &code) != 1 || code != ACK || strlen(mesh->line) < 3) {
- fprintf(stderr, "Cannot read greeting from peer\n");
+ logger(mesh, MESHLINK_DEBUG, "Cannot read greeting from peer\n");
closesocket(mesh->sock);
+ meshlink_errno = MESHLINK_ENETWORK;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
char *fingerprint = mesh->line + 2;
char hishash[64];
if(sha512(fingerprint, strlen(fingerprint), hishash)) {
- fprintf(stderr, "Could not create hash\n%s\n", mesh->line + 2);
+ logger(mesh, MESHLINK_DEBUG, "Could not create hash\n%s\n", mesh->line + 2);
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
if(memcmp(hishash, mesh->hash, 18)) {
- fprintf(stderr, "Peer has an invalid key!\n%s\n", mesh->line + 2);
+ logger(mesh, MESHLINK_DEBUG, "Peer has an invalid key!\n%s\n", mesh->line + 2);
+ meshlink_errno = MESHLINK_EPEER;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
ecdsa_t *hiskey = ecdsa_set_base64_public_key(fingerprint);
- if(!hiskey)
+ if(!hiskey) {
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
+ }
// Start an SPTPS session
- if(!sptps_start(&mesh->sptps, mesh, true, false, key, hiskey, "meshlink invitation", 15, invitation_send, invitation_receive))
+ if(!sptps_start(&mesh->sptps, mesh, true, false, key, hiskey, "meshlink invitation", 15, invitation_send, invitation_receive)) {
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
+ }
// Feed rest of input buffer to SPTPS
- if(!sptps_receive_data(&mesh->sptps, mesh->buffer, mesh->blen))
+ if(!sptps_receive_data(&mesh->sptps, mesh->buffer, mesh->blen)) {
+ meshlink_errno = MESHLINK_EPEER;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
+ }
int len;
if(len < 0) {
if(errno == EINTR)
continue;
- fprintf(stderr, "Error reading data from %s port %s: %s\n", address, port, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Error reading data from %s port %s: %s\n", address, port, strerror(errno));
+ meshlink_errno = MESHLINK_ENETWORK;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
- if(!sptps_receive_data(&mesh->sptps, mesh->line, len))
+ if(!sptps_receive_data(&mesh->sptps, mesh->line, len)) {
+ meshlink_errno = MESHLINK_EPEER;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
+ }
}
sptps_stop(&mesh->sptps);
closesocket(mesh->sock);
if(!mesh->success) {
- fprintf(stderr, "Connection closed by peer, invitation cancelled.\n");
+ logger(mesh, MESHLINK_DEBUG, "Connection closed by peer, invitation cancelled.\n");
+ meshlink_errno = MESHLINK_EPEER;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return true;
invalid:
- fprintf(stderr, "Invalid invitation URL or you are already connected to a Mesh ?\n");
+ logger(mesh, MESHLINK_DEBUG, "Invalid invitation URL or you are already connected to a Mesh ?\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
char *meshlink_export(meshlink_handle_t *mesh) {
+ if(!mesh) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
char filename[PATH_MAX];
snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, mesh->self->name);
FILE *f = fopen(filename, "r");
if(!f) {
- fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not open %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return NULL;
}
char *buf = xmalloc(len);
snprintf(buf, len, "Name = %s\n", mesh->self->name);
if(fread(buf + len - fsize - 1, fsize, 1, f) != 1) {
- fprintf(stderr, "Error reading from %s: %s\n", filename, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Error reading from %s: %s\n", filename, strerror(errno));
fclose(f);
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return NULL;
}
fclose(f);
buf[len - 1] = 0;
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return buf;
}
bool meshlink_import(meshlink_handle_t *mesh, const char *data) {
+ if(!mesh || !data) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
if(strncmp(data, "Name = ", 7)) {
- fprintf(stderr, "Invalid data\n");
+ logger(mesh, MESHLINK_DEBUG, "Invalid data\n");
+ meshlink_errno = MESHLINK_EPEER;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
char *end = strchr(data + 7, '\n');
if(!end) {
- fprintf(stderr, "Invalid data\n");
+ logger(mesh, MESHLINK_DEBUG, "Invalid data\n");
+ meshlink_errno = MESHLINK_EPEER;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
memcpy(name, data + 7, len);
name[len] = 0;
if(!check_id(name)) {
- fprintf(stderr, "Invalid Name\n");
+ logger(mesh, MESHLINK_DEBUG, "Invalid Name\n");
+ meshlink_errno = MESHLINK_EPEER;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
char filename[PATH_MAX];
snprintf(filename, sizeof filename, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, name);
if(!access(filename, F_OK)) {
- fprintf(stderr, "File %s already exists, not importing\n", filename);
+ logger(mesh, MESHLINK_DEBUG, "File %s already exists, not importing\n", filename);
+ meshlink_errno = MESHLINK_EEXIST;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
if(errno != ENOENT) {
- fprintf(stderr, "Error accessing %s: %s\n", filename, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Error accessing %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
FILE *f = fopen(filename, "w");
if(!f) {
- fprintf(stderr, "Could not create %s: %s\n", filename, strerror(errno));
+ logger(mesh, MESHLINK_DEBUG, "Could not create %s: %s\n", filename, strerror(errno));
+ meshlink_errno = MESHLINK_ESTORAGE;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
load_all_nodes(mesh);
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
return true;
}
void meshlink_blacklist(meshlink_handle_t *mesh, meshlink_node_t *node) {
- node_t *n;
- n = (node_t*)node;
- n->status.blacklisted=true;
- fprintf(stderr, "Blacklisted %s.\n",node->name);
+ if(!mesh || !node) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ node_t *n;
+ n = (node_t*)node;
+ n->status.blacklisted=true;
+ logger(mesh, MESHLINK_DEBUG, "Blacklisted %s.\n",node->name);
//Make blacklisting persistent in the config file
append_config_file(mesh, n->name, "blacklisted", "yes");
- return;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return;
+}
+
+void meshlink_whitelist(meshlink_handle_t *mesh, meshlink_node_t *node) {
+ if(!mesh || !node) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ node_t *n = (node_t *)node;
+ n->status.blacklisted = false;
+
+ //TODO: remove blacklisted = yes from the config file
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return;
+}
+
+/* Hint that a hostname may be found at an address
+ * See header file for detailed comment.
+ */
+void meshlink_hint_address(meshlink_handle_t *mesh, meshlink_node_t *node, const struct sockaddr *addr) {
+ if(!mesh || !node || !addr)
+ return;
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ char *host = NULL, *port = NULL, *str = NULL;
+ sockaddr2str((const sockaddr_t *)addr, &host, &port);
+
+ if(host && port) {
+ xasprintf(&str, "%s %s", host, port);
+ if ( (strncmp ("fe80",host,4) != 0) && ( strncmp("127.",host,4) != 0 ) && ( strcmp("localhost",host) !=0 ) )
+ append_config_file(mesh, node->name, "Address", str);
+ else
+ logger(mesh, MESHLINK_DEBUG, "Not adding Link Local IPv6 Address to config\n");
+ }
+
+ free(str);
+ free(host);
+ free(port);
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ // @TODO do we want to fire off a connection attempt right away?
+}
+
+/* Return an array of edges in the current network graph.
+ * Data captures the current state and will not be updated.
+ * Caller must deallocate data when done.
+ */
+meshlink_edge_t **meshlink_get_all_edges_state(meshlink_handle_t *mesh, meshlink_edge_t **edges, size_t *nmemb) {
+ if(!mesh || !nmemb || (*nmemb && !edges)) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+
+ meshlink_edge_t **result = NULL;
+ meshlink_edge_t *copy = NULL;
+ int result_size = 0;
+
+ result_size = mesh->edges->count;
+
+ // if result is smaller than edges, we have to dealloc all the excess meshlink_edge_t
+ if(result_size > *nmemb) {
+ result = realloc(edges, result_size * sizeof (meshlink_edge_t*));
+ } else {
+ result = edges;
+ }
+
+ if(result) {
+ meshlink_edge_t **p = result;
+ int n = 0;
+ for splay_each(edge_t, e, mesh->edges) {
+ // skip edges that do not represent a two-directional connection
+ if((!e->reverse) || (e->reverse->to != e->from)) {
+ result_size--;
+ continue;
+ }
+ n++;
+ // the first *nmemb members of result can be re-used
+ if(n > *nmemb) {
+ copy = xzalloc(sizeof *copy);
+ }
+ else {
+ copy = *p;
+ }
+ copy->from = (meshlink_node_t*)e->from;
+ copy->to = (meshlink_node_t*)e->to;
+ copy->address = e->address.storage;
+ copy->options = e->options;
+ copy->weight = e->weight;
+ *p++ = copy;
+ }
+ // shrink result to the actual amount of memory used
+ for(int i = *nmemb; i > result_size; i--) {
+ free(result[i - 1]);
+ }
+ result = realloc(result, result_size * sizeof (meshlink_edge_t*));
+ *nmemb = result_size;
+ } else {
+ *nmemb = 0;
+ free(result);
+ meshlink_errno = MESHLINK_ENOMEM;
+ }
+
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+
+ return result;
}
+ static bool channel_pre_accept(struct utcp *utcp, uint16_t port) {
+ //TODO: implement
+ return false;
+ }
+
+ static void channel_accept(struct utcp_connection *utcp_connection, uint16_t port) {
+ //TODO: implement
+ }
+
+ static int channel_recv(struct utcp_connection *connection, const void *data, size_t len) {
+ meshlink_channel_t *channel = connection->priv;
+ node_t *n = channel->node;
+ meshlink_handle_t *mesh = n->mesh;
+ if(!channel->receive_cb)
+ return -1;
+ else {
+ channel->receive_cb(mesh, channel, data, len);
+ return 0;
+ }
+ }
+
+ static int channel_send(struct utcp *utcp, const void *data, size_t len) {
+ node_t *n = utcp->priv;
+ meshlink_handle_t *mesh = n->mesh;
+ return meshlink_send(mesh, (meshlink_node_t *)n, data, len) ? len : -1;
+ }
+
+ void meshlink_set_channel_accept_cb(meshlink_handle_t *mesh, meshlink_channel_accept_cb_t cb) {
+ mesh->channel_accept_cb = cb;
+ }
+
+ void meshlink_set_channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, meshlink_channel_receive_cb_t cb) {
+ channel->receive_cb = cb;
+ }
+
+ meshlink_channel_t *meshlink_channel_open(meshlink_handle_t *mesh, meshlink_node_t *node, uint16_t port, meshlink_channel_receive_cb_t cb, const void *data, size_t len) {
+ node_t *n = (node_t *)node;
+ if(!n->utcp) {
+ n->utcp = utcp_init(channel_accept, channel_pre_accept, channel_send, n);
+ if(!n->utcp)
+ return NULL;
+ }
+ meshlink_channel_t *channel = xzalloc(sizeof *channel);
+ channel->node = n;
+ channel->receive_cb = cb;
+ channel->c = utcp_connect(n->utcp, port, channel_recv, channel);
+ if(!channel->c) {
+ free(channel);
+ return NULL;
+ }
+ return channel;
+ }
+
+ void meshlink_channel_shutdown(meshlink_handle_t *mesh, meshlink_channel_t *channel, int direction) {
+ utcp_shutdown(channel->c, direction);
+ }
+
+ void meshlink_channel_close(meshlink_handle_t *mesh, meshlink_channel_t *channel) {
+ utcp_close(channel->c);
+ free(channel);
+ }
+
+ ssize_t meshlink_channel_send(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len) {
+ // TODO: locking.
+ // Ideally we want to put the data into the UTCP connection's send buffer.
+ // Then, preferrably only if there is room in the receiver window,
+ // kick the meshlink thread to go send packets.
+ return utcp_send(channel->c, data, len);
+ }
+
static void __attribute__((constructor)) meshlink_init(void) {
crypto_init();
}
static void __attribute__((destructor)) meshlink_exit(void) {
crypto_exit();
}
+
+
+/// Device class traits
+dev_class_traits_t dev_class_traits[_DEV_CLASS_MAX +1] = {
+ { .min_connects = 3, .max_connects = 10000, .edge_weight = 1 }, // DEV_CLASS_BACKBONE
+ { .min_connects = 3, .max_connects = 100, .edge_weight = 3 }, // DEV_CLASS_STATIONARY
+ { .min_connects = 3, .max_connects = 3, .edge_weight = 6 }, // DEV_CLASS_PORTABLE
+ { .min_connects = 1, .max_connects = 1, .edge_weight = 9 }, // DEV_CLASS_UNKNOWN
+};
projects / meshlink / commitdiff