/*
meshlink.c -- Implementation of the MeshLink API.
- Copyright (C) 2014, 2017 Guus Sliepen <guus@meshlink.io>
+ Copyright (C) 2014-2018 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
//TODO: this can go away completely
const var_t variables[] = {
/* Server configuration */
- {"AddressFamily", VAR_SERVER},
- {"AutoConnect", VAR_SERVER | VAR_SAFE},
- {"BindToAddress", VAR_SERVER | VAR_MULTIPLE},
- {"BindToInterface", VAR_SERVER},
- {"Broadcast", VAR_SERVER | VAR_SAFE},
{"ConnectTo", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
- {"DecrementTTL", VAR_SERVER},
- {"Device", VAR_SERVER},
- {"DeviceType", VAR_SERVER},
- {"DirectOnly", VAR_SERVER},
- {"ECDSAPrivateKeyFile", VAR_SERVER},
- {"ExperimentalProtocol", VAR_SERVER},
- {"Forwarding", VAR_SERVER},
- {"GraphDumpFile", VAR_SERVER | VAR_OBSOLETE},
- {"Hostnames", VAR_SERVER},
- {"IffOneQueue", VAR_SERVER},
- {"Interface", VAR_SERVER},
- {"KeyExpire", VAR_SERVER},
- {"ListenAddress", VAR_SERVER | VAR_MULTIPLE},
- {"LocalDiscovery", VAR_SERVER},
- {"MACExpire", VAR_SERVER},
- {"MaxConnectionBurst", VAR_SERVER},
- {"MaxOutputBufferSize", VAR_SERVER},
- {"MaxTimeout", VAR_SERVER},
- {"Mode", VAR_SERVER | VAR_SAFE},
{"Name", VAR_SERVER},
- {"PingInterval", VAR_SERVER},
- {"PingTimeout", VAR_SERVER},
- {"PriorityInheritance", VAR_SERVER},
- {"PrivateKey", VAR_SERVER | VAR_OBSOLETE},
- {"PrivateKeyFile", VAR_SERVER},
- {"ProcessPriority", VAR_SERVER},
- {"Proxy", VAR_SERVER},
- {"ReplayWindow", VAR_SERVER},
- {"ScriptsExtension", VAR_SERVER},
- {"ScriptsInterpreter", VAR_SERVER},
- {"StrictSubnets", VAR_SERVER},
- {"TunnelServer", VAR_SERVER},
- {"VDEGroup", VAR_SERVER},
- {"VDEPort", VAR_SERVER},
/* Host configuration */
+ {"CanonicalAddress", VAR_HOST},
{"Address", VAR_HOST | VAR_MULTIPLE},
- {"Cipher", VAR_SERVER | VAR_HOST},
- {"ClampMSS", VAR_SERVER | VAR_HOST},
- {"Compression", VAR_SERVER | VAR_HOST},
- {"Digest", VAR_SERVER | VAR_HOST},
{"ECDSAPublicKey", VAR_HOST},
- {"ECDSAPublicKeyFile", VAR_SERVER | VAR_HOST},
- {"IndirectData", VAR_SERVER | VAR_HOST},
- {"MACLength", VAR_SERVER | VAR_HOST},
- {"PMTU", VAR_SERVER | VAR_HOST},
- {"PMTUDiscovery", VAR_SERVER | VAR_HOST},
{"Port", VAR_HOST},
- {"PublicKey", VAR_HOST | VAR_OBSOLETE},
- {"PublicKeyFile", VAR_SERVER | VAR_HOST | VAR_OBSOLETE},
- {"Subnet", VAR_HOST | VAR_MULTIPLE | VAR_SAFE},
- {"TCPOnly", VAR_SERVER | VAR_HOST},
- {"Weight", VAR_HOST | VAR_SAFE},
{NULL, 0}
};
static void scan_for_hostname(const char *filename, char **hostname, char **port) {
char line[4096];
+ bool canonical = false;
if(!filename || (*hostname && *port)) {
return;
q += 1 + strspn(q + 1, "\t ");
}
+ // q is now pointing to the hostname
*p = 0;
p = q + strcspn(q, "\t ");
p += strspn(p, "\t ");
p[strcspn(p, "\t ")] = 0;
+ // p is now pointing to the port, if present
if(!*port && !strcasecmp(line, "Port")) {
*port = xstrdup(q);
- } else if(!*hostname && !strcasecmp(line, "Address")) {
+ } else if(!canonical && !*hostname && !strcasecmp(line, "Address")) {
+ // Check that the hostname is a symbolic name (it's not a numeric IPv4 or IPv6 address)
+ if(!q[strspn(q, "0123456789.")] || strchr(q, ':')) {
+ continue;
+ }
+
+ *hostname = xstrdup(q);
+
+ if(*p) {
+ free(*port);
+ *port = xstrdup(p);
+ }
+ } else if(!strcasecmp(line, "CanonicalAddress")) {
*hostname = xstrdup(q);
+ canonical = true;
if(*p) {
free(*port);
}
}
- if(*hostname && *port) {
+ if(canonical && *hostname && *port) {
break;
}
}
}
static bool is_valid_hostname(const char *hostname) {
+ if(!*hostname) {
+ return false;
+ }
+
for(const char *p = hostname; *p; p++) {
if(!(isalnum(*p) || *p == '-' || *p == '.' || *p == ':')) {
return false;
return true;
}
+static bool is_valid_port(const char *port) {
+ if(!*port) {
+ return false;
+ }
+
+ if(isdigit(*port)) {
+ char *end;
+ unsigned long int result = strtoul(port, &end, 10);
+ return result && result < 65536 && !*end;
+ }
+
+ for(const char *p = port; *p; p++) {
+ if(!(isalnum(*p) || *p == '-')) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
static void set_timeout(int sock, int timeout) {
#ifdef _WIN32
DWORD tv = timeout;
setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
}
+// Find out what local address a socket would use if we connect to the given address.
+// We do this using connect() on a UDP socket, so the kernel has to resolve the address
+// of both endpoints, but this will actually not send any UDP packet.
+static bool getlocaladdrname(char *destaddr, char *host, socklen_t hostlen) {
+ struct addrinfo *rai = NULL;
+ const struct addrinfo hint = {
+ .ai_family = AF_UNSPEC,
+ .ai_socktype = SOCK_DGRAM,
+ .ai_protocol = IPPROTO_UDP,
+ };
+
+ if(getaddrinfo(destaddr, "80", &hint, &rai) || !rai) {
+ return false;
+ }
+
+ int sock = socket(rai->ai_family, rai->ai_socktype, rai->ai_protocol);
+
+ if(sock == -1) {
+ freeaddrinfo(rai);
+ return false;
+ }
+
+ if(connect(sock, rai->ai_addr, rai->ai_addrlen) && !sockwouldblock(errno)) {
+ freeaddrinfo(rai);
+ return false;
+ }
+
+ freeaddrinfo(rai);
+
+ struct sockaddr_storage sn;
+ socklen_t sl = sizeof(sn);
+
+ if(getsockname(sock, (struct sockaddr *)&sn, &sl)) {
+ return false;
+ }
+
+ if(getnameinfo((struct sockaddr *)&sn, sl, host, hostlen, NULL, 0, NI_NUMERICHOST | NI_NUMERICSERV)) {
+ return false;
+ }
+
+ return true;
+}
+
char *meshlink_get_external_address(meshlink_handle_t *mesh) {
+ return meshlink_get_external_address_for_family(mesh, AF_UNSPEC);
+}
+
+char *meshlink_get_external_address_for_family(meshlink_handle_t *mesh, int family) {
char *hostname = NULL;
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://www.meshlink.io/host.cgi HTTP/1.0\r\n\r\n";
char line[256];
- while(aip) {
+ for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
+ if(family != AF_UNSPEC && aip->ai_family != family) {
+ continue;
+ }
+
int s = socket(aip->ai_family, aip->ai_socktype, aip->ai_protocol);
if(s >= 0) {
break;
}
}
-
- aip = aip->ai_next;
- continue;
}
if(ai) {
hostname = NULL;
}
+ // If there is no hostname, determine the address used for an outgoing connection.
+ if(!hostname) {
+ char localaddr[NI_MAXHOST];
+ bool success = false;
+
+ if(family == AF_INET) {
+ success = getlocaladdrname("93.184.216.34", localaddr, sizeof(localaddr));
+ } else if(family == AF_INET6) {
+ success = getlocaladdrname("2606:2800:220:1:248:1893:25c8:1946", localaddr, sizeof(localaddr));
+ }
+
+ if(success) {
+ hostname = xstrdup(localaddr);
+ }
+ }
+
if(!hostname) {
meshlink_errno = MESHLINK_ERESOLV;
}
return hostname;
}
+// String comparison which handles NULL arguments
+static bool safe_streq(const char *a, const char *b) {
+ if (!a || !b)
+ return a == b;
+ else
+ return !strcmp(a, b);
+}
+
+// This gets the hostname part for use in invitation URLs
static char *get_my_hostname(meshlink_handle_t *mesh) {
- char *hostname = NULL;
- char *port = NULL;
+ char *hostname[3] = {NULL};
+ char *port[3] = {NULL};
char *hostport = NULL;
- char *name = mesh->self->name;
- char filename[PATH_MAX] = "";
- FILE *f;
- // Use first Address statement in own host config file
- snprintf(filename, sizeof(filename), "%s" SLASH "hosts" SLASH "%s", mesh->confbase, name);
- scan_for_hostname(filename, &hostname, &port);
+ // Use the best Address statement in our own host config file
+ char filename[PATH_MAX] = "";
+ snprintf(filename, sizeof(filename), "%s" SLASH "hosts" SLASH "%s", mesh->confbase, mesh->self->name);
+ scan_for_hostname(filename, &hostname[0], &port[0]);
- if(hostname) {
- goto done;
- }
+ hostname[1] = meshlink_get_external_address_for_family(mesh, AF_INET);
+ hostname[2] = meshlink_get_external_address_for_family(mesh, AF_INET6);
- hostname = meshlink_get_external_address(mesh);
+ // Concatenate all unique address to the hostport string
+ for (int i = 0; i < 3; i++) {
+ if (!hostname[i])
+ continue;
- if(!hostname) {
- return NULL;
- }
+ // Ignore duplicate hostnames
+ bool found = false;
- f = fopen(filename, "a");
+ for (int j = 0; i < j; j++) {
+ if (safe_streq(hostname[i], hostname[j]) && safe_streq(port[i], port[j])) {
+ found = true;
+ break;
+ }
+ }
- if(f) {
- fprintf(f, "\nAddress = %s\n", hostname);
- fclose(f);
- } else {
- logger(mesh, MESHLINK_DEBUG, "Could not append Address to %s: %s\n", filename, strerror(errno));
- }
+ if (found) {
+ free(hostname[i]);
+ free(port[i]);
+ hostname[i] = NULL;
+ port[i] = NULL;
+ continue;
+ }
-done:
+ // Ensure we have the same addresses in our own host config file.
+ char *tmphostport;
+ xasprintf(&tmphostport, "%s %s", hostname[i], port[i] ? port[i] : mesh->myport);
+ append_config_file(mesh, mesh->self->name, "Address", tmphostport);
+ free(tmphostport);
- if(port) {
- if(strchr(hostname, ':')) {
- xasprintf(&hostport, "[%s]:%s", hostname, port);
- } else {
- xasprintf(&hostport, "%s:%s", hostname, port);
- }
- } else {
- if(strchr(hostname, ':')) {
- xasprintf(&hostport, "[%s]", hostname);
- } else {
- hostport = xstrdup(hostname);
- }
+ // Append the address to the hostport string
+ char *newhostport;
+ xasprintf(&newhostport, (strchr(hostname[i], ':') ? "%s%s[%s]:%s" : "%s%s%s:%s"), hostport ? hostport : "", hostport ? "," : "", hostname[i], port[i] ? port[i] : mesh->myport);
+ free(hostname[i]);
+ free(port[i]);
+ free(hostport);
+ hostport = newhostport;
}
- free(hostname);
- free(port);
return hostport;
}
return 0;
}
+static void deltree(const char *dirname) {
+ DIR *d = opendir(dirname);
+
+ if(d) {
+ struct dirent *ent;
+
+ while((ent = readdir(d))) {
+ if(ent->d_name[0] == '.') {
+ continue;
+ }
+
+ char filename[PATH_MAX];
+ snprintf(filename, sizeof(filename), "%s" SLASH "%s", dirname, ent->d_name);
+
+ if(unlink(filename)) {
+ deltree(filename);
+ }
+ }
+
+ closedir(d);
+ }
+
+ rmdir(dirname);
+}
+
static bool finalize_join(meshlink_handle_t *mesh) {
char *name = xstrdup(get_value(mesh->data, "Name"));
fprintf(f, "Name = %s\n", name);
+ // Wipe all old host config files and invitations
+ snprintf(filename, sizeof(filename), "%s" SLASH "hosts", mesh->confbase);
+ deltree(filename);
+
+ if(mkdir(filename, 0777) && errno != EEXIST) {
+ logger(mesh, MESHLINK_DEBUG, "Could not create directory %s: %s\n", filename, strerror(errno));
+ return false;
+ }
+
+ snprintf(filename, sizeof(filename), "%s" SLASH "invitations", mesh->confbase);
+ deltree(filename);
+
+ // Create a new host config file for ourself
snprintf(filename, sizeof(filename), "%s" SLASH "hosts" SLASH "%s", mesh->confbase, name);
FILE *fh = fopen(filename, "w");
continue;
}
- // Check the list of known variables //TODO: most variables will not be available in meshlink, only name and key will be absolutely necessary
+ // Check the list of known variables
bool found = false;
int i;
sptps_send_record(&(mesh->sptps), 1, b64key, strlen(b64key));
free(b64key);
+ free(mesh->name);
free(mesh->self->name);
free(mesh->self->connection->name);
+ mesh->name = xstrdup(name);
mesh->self->name = xstrdup(name);
mesh->self->connection->name = name;
static bool invitation_send(void *handle, uint8_t type, const void *data, size_t len) {
(void)type;
meshlink_handle_t *mesh = handle;
+ const char *ptr = data;
while(len) {
- int result = send(mesh->sock, data, len, 0);
+ int result = send(mesh->sock, ptr, len, 0);
if(result == -1 && errno == EINTR) {
continue;
return false;
}
- data += result;
+ ptr += result;
len -= result;
}
[MESHLINK_ESTORAGE] = "Storage error",
[MESHLINK_ENETWORK] = "Network error",
[MESHLINK_EPEER] = "Error communicating with peer",
+ [MESHLINK_ENOTSUP] = "Operation not supported",
+ [MESHLINK_EBUSY] = "MeshLink instance already in use",
};
const char *meshlink_strerror(meshlink_errno_t err) {
logger(mesh, MESHLINK_DEBUG, "Done.\n");
}
- snprintf(privname, sizeof(privname), "%s" SLASH "ecdsa_key.priv", mesh->confbase);
+ if(snprintf(privname, sizeof(privname), "%s" SLASH "ecdsa_key.priv", mesh->confbase) >= PATH_MAX) {
+ logger(mesh, MESHLINK_DEBUG, "Filename too long: %s" SLASH "ecdsa_key.priv\n", mesh->confbase);
+ meshlink_errno = MESHLINK_ESTORAGE;
+ return false;
+ }
+
f = fopen(privname, "wb");
if(!f) {
return tmin;
}
-// Find out what local address a socket would use if we connect to the given address.
-// We do this using connect() on a UDP socket, so the kernel has to resolve the address
-// of both endpoints, but this will actually not send any UDP packet.
-static bool getlocaladdrname(char *destaddr, char *host, socklen_t hostlen) {
- struct addrinfo *rai = NULL;
- const struct addrinfo hint = {
- .ai_family = AF_UNSPEC,
- .ai_socktype = SOCK_DGRAM,
- .ai_protocol = IPPROTO_UDP,
- };
-
- if(getaddrinfo(destaddr, "80", &hint, &rai) || !rai) {
- return false;
- }
-
- int sock = socket(rai->ai_family, rai->ai_socktype, rai->ai_protocol);
-
- if(sock == -1) {
- freeaddrinfo(rai);
- return false;
- }
-
- if(connect(sock, rai->ai_addr, rai->ai_addrlen) && !sockwouldblock(errno)) {
- freeaddrinfo(rai);
- return false;
- }
-
- freeaddrinfo(rai);
-
- struct sockaddr_storage sn;
- socklen_t sl = sizeof(sn);
-
- if(getsockname(sock, (struct sockaddr *)&sn, &sl)) {
- return false;
- }
-
- if(getnameinfo((struct sockaddr *)&sn, sl, host, hostlen, NULL, 0, NI_NUMERICHOST | NI_NUMERICSERV)) {
- return false;
- }
-
- return true;
-}
-
// Get our local address(es) by simulating connecting to an Internet host.
static void add_local_addresses(meshlink_handle_t *mesh) {
char host[NI_MAXHOST];
return false;
}
- if (check_port(mesh) == 0) {
+ if(check_port(mesh) == 0) {
meshlink_errno = MESHLINK_ENETWORK;
unlink(filename);
return false;
return NULL;
}
+ if(strchr(appname, ' ')) {
+ logger(NULL, MESHLINK_ERROR, "Invalid appname given!\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ return NULL;
+ }
+
if(!name || !*name) {
logger(NULL, MESHLINK_ERROR, "No name given!\n");
//return NULL;
mesh->confbase = xstrdup(confbase);
mesh->appname = xstrdup(appname);
mesh->devclass = devclass;
+ mesh->discovery = true;
+ mesh->invitation_timeout = 604800; // 1 week
if(usingname) {
mesh->name = xstrdup(name);
}
}
+ // Open the configuration file and lock it
+
+ mesh->conffile = fopen(filename, "r");
+
+ if(!mesh->conffile) {
+ logger(NULL, MESHLINK_ERROR, "Cannot not open %s: %s\n", filename, strerror(errno));
+ meshlink_close(mesh);
+ meshlink_errno = MESHLINK_ESTORAGE;
+ return NULL;
+ }
+
+#ifdef FD_CLOEXEC
+ fcntl(fileno(mesh->conffile), F_SETFD, FD_CLOEXEC);
+#endif
+
+#ifdef HAVE_MINGW
+ // TODO: use _locking()?
+#else
+ if(flock(fileno(mesh->conffile), LOCK_EX | LOCK_NB) != 0) {
+ logger(NULL, MESHLINK_ERROR, "Cannot lock %s: %s\n", filename, strerror(errno));
+ meshlink_close(mesh);
+ meshlink_errno = MESHLINK_EBUSY;
+ return NULL;
+ }
+#endif
+
// Read the configuration
init_configuration(&mesh->config);
logger(mesh, MESHLINK_DEBUG, "Could not start thread: %s\n", strerror(errno));
memset(&mesh->thread, 0, sizeof(mesh)->thread);
meshlink_errno = MESHLINK_EINTERNAL;
+ event_loop_stop(&mesh->loop);
pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
}
mesh->threadstarted = true;
+#if HAVE_CATTA
+
if(mesh->discovery) {
discovery_start(mesh);
}
+#endif
+
pthread_mutex_unlock(&(mesh->mesh_mutex));
return true;
}
pthread_mutex_lock(&(mesh->mesh_mutex));
logger(mesh, MESHLINK_DEBUG, "meshlink_stop called\n");
+#if HAVE_CATTA
+
// Stop discovery
if(mesh->discovery) {
discovery_stop(mesh);
}
+#endif
+
// Shut down the main thread
event_loop_stop(&mesh->loop);
// Send ourselves a UDP packet to kick the event loop
- listen_socket_t *s = &mesh->listen_socket[0];
+ for(int i = 0; i < mesh->listen_sockets; i++) {
+ sockaddr_t sa;
+ socklen_t salen = sizeof(sa.sa);
- if(sendto(s->udp.fd, "", 1, MSG_NOSIGNAL, &s->sa.sa, SALEN(s->sa.sa)) == -1) {
- logger(mesh, MESHLINK_ERROR, "Could not send a UDP packet to ourself");
+ if(getsockname(mesh->listen_socket[i].udp.fd, &sa.sa, &salen) == -1) {
+ logger(mesh, MESHLINK_ERROR, "System call `%s' failed: %s", "getsockname", sockstrerror(sockerrno));
+ continue;
+ }
+
+ if(sendto(mesh->listen_socket[i].udp.fd, "", 1, MSG_NOSIGNAL, &sa.sa, salen) == -1) {
+ logger(mesh, MESHLINK_ERROR, "Could not send a UDP packet to ourself: %s", sockstrerror(sockerrno));
+ }
}
- // Wait for the main thread to finish
- pthread_mutex_unlock(&(mesh->mesh_mutex));
- pthread_join(mesh->thread, NULL);
- pthread_mutex_lock(&(mesh->mesh_mutex));
+ if(mesh->threadstarted) {
+ // 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;
+ mesh->threadstarted = false;
+ }
// Close all metaconnections
if(mesh->connections) {
if(mesh->outgoings) {
list_delete_list(mesh->outgoings);
+ mesh->outgoings = NULL;
}
- mesh->outgoings = NULL;
-
pthread_mutex_unlock(&(mesh->mesh_mutex));
}
free(mesh->confbase);
pthread_mutex_destroy(&(mesh->mesh_mutex));
+ if(mesh->conffile) {
+ fclose(mesh->conffile);
+ }
+
memset(mesh, 0, sizeof(*mesh));
free(mesh);
}
-static void deltree(const char *dirname) {
- DIR *d = opendir(dirname);
-
- if(d) {
- struct dirent *ent;
-
- while((ent = readdir(d))) {
- if(ent->d_name[0] == '.') {
- continue;
- }
-
- char filename[PATH_MAX];
- snprintf(filename, sizeof(filename), "%s" SLASH "%s", dirname, ent->d_name);
-
- if(unlink(filename)) {
- deltree(filename);
- }
- }
-
- closedir(d);
- }
-
- rmdir(dirname);
- return;
-}
-
bool meshlink_destroy(const char *confbase) {
if(!confbase) {
meshlink_errno = MESHLINK_EINVAL;
pthread_mutex_unlock(&(mesh->mesh_mutex));
}
+void meshlink_set_node_duplicate_cb(meshlink_handle_t *mesh, meshlink_node_duplicate_cb_t cb) {
+ if(!mesh) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return;
+ }
+
+ pthread_mutex_lock(&(mesh->mesh_mutex));
+ mesh->node_duplicate_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) {
if(mesh) {
pthread_mutex_lock(&(mesh->mesh_mutex));
char invname[PATH_MAX];
struct stat st;
- snprintf(invname, sizeof(invname), "%s" SLASH "%s", filename, ent->d_name);
+
+ if(snprintf(invname, sizeof(invname), "%s" SLASH "%s", filename, ent->d_name) >= PATH_MAX) {
+ logger(mesh, MESHLINK_DEBUG, "Filename too long: %s" SLASH "%s", filename, ent->d_name);
+ continue;
+ }
if(!stat(invname, &st)) {
if(mesh->invitation_key && deadline < st.st_mtime) {
return mesh->invitation_key;
}
-bool meshlink_add_address(meshlink_handle_t *mesh, const char *address) {
- if(!mesh || !address) {
+bool meshlink_set_canonical_address(meshlink_handle_t *mesh, meshlink_node_t *node, const char *address, const char *port) {
+ if(!mesh || !node || !address) {
meshlink_errno = MESHLINK_EINVAL;
return false;
}
return false;
}
- bool rval = false;
+ if(port && !is_valid_port(port)) {
+ logger(mesh, MESHLINK_DEBUG, "Invalid character in port: %s\n", address);
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ char *canonical_address;
+
+ if(port) {
+ xasprintf(&canonical_address, "%s %s", address, port);
+ } else {
+ canonical_address = xstrdup(address);
+ }
pthread_mutex_lock(&(mesh->mesh_mutex));
- rval = append_config_file(mesh, mesh->self->name, "Address", address);
+ bool rval = modify_config_file(mesh, node->name, "CanonicalAddress", canonical_address, 1);
pthread_mutex_unlock(&(mesh->mesh_mutex));
+ free(canonical_address);
return rval;
}
+bool meshlink_add_address(meshlink_handle_t *mesh, const char *address) {
+ return meshlink_set_canonical_address(mesh, (meshlink_node_t *)mesh->self, address, NULL);
+}
+
bool meshlink_add_external_address(meshlink_handle_t *mesh) {
if(!mesh) {
meshlink_errno = MESHLINK_EINVAL;
return rval;
}
+void meshlink_set_invitation_timeout(meshlink_handle_t *mesh, int timeout) {
+ mesh->invitation_timeout = timeout;
+}
+
char *meshlink_invite(meshlink_handle_t *mesh, const char *name) {
if(!mesh) {
meshlink_errno = MESHLINK_EINVAL;
// Fill in the details.
fprintf(f, "Name = %s\n", name);
- //if(netname)
- // fprintf(f, "NetName = %s\n", netname);
fprintf(f, "ConnectTo = %s\n", mesh->self->name);
// Copy Broadcast and Mode
pthread_mutex_lock(&(mesh->mesh_mutex));
+ //Before doing meshlink_join make sure we are not connected to another mesh
+ if(mesh->threadstarted) {
+ logger(mesh, MESHLINK_DEBUG, "Already connected to a mesh\n");
+ meshlink_errno = MESHLINK_EINVAL;
+ pthread_mutex_unlock(&(mesh->mesh_mutex));
+ return false;
+ }
+
//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);
- // Split the invitation URL into hostname, port, key hash and cookie.
+ // Split the invitation URL into a list of hostname/port tuples, a key hash and a cookie.
char *slash = strchr(copy, '/');
char *address = copy;
char *port = NULL;
- if(*address == '[') {
- address++;
- char *bracket = strchr(address, ']');
-
- if(!bracket) {
- goto invalid;
- }
-
- *bracket = 0;
-
- if(bracket[1] == ':') {
- port = bracket + 2;
- }
- } else {
- port = strchr(address, ':');
-
- if(port) {
- *port++ = 0;
- }
- }
-
- if(!port) {
- goto invalid;
- }
-
if(!b64decode(slash, mesh->hash, 18) || !b64decode(slash + 24, mesh->cookie, 18)) {
goto invalid;
}
}
char *b64key = ecdsa_get_base64_public_key(key);
+ char *comma;
+ mesh->sock = -1;
- //Before doing meshlink_join make sure we are not connected to another mesh
- if(mesh->threadstarted) {
- goto invalid;
- }
+ while(address && *address) {
+ // We allow commas in the address part to support multiple addresses in one invitation URL.
+ comma = strchr(address, ',');
- // Connect to the meshlink daemon mentioned in the URL.
- struct addrinfo *ai = str2addrinfo(address, port, SOCK_STREAM);
+ if(comma) {
+ *comma++ = 0;
+ }
- if(!ai) {
- meshlink_errno = MESHLINK_ERESOLV;
- pthread_mutex_unlock(&(mesh->mesh_mutex));
- return false;
- }
+ // Split of the port
+ port = strrchr(address, ':');
- mesh->sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
+ if(!port) {
+ goto invalid;
+ }
- if(mesh->sock <= 0) {
- 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;
- }
+ *port++ = 0;
- set_timeout(mesh->sock, 5000);
+ // IPv6 address are enclosed in brackets, per RFC 3986
+ if(*address == '[') {
+ address++;
+ char *bracket = strchr(address, ']');
- if(connect(mesh->sock, ai->ai_addr, ai->ai_addrlen)) {
- 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;
+ if(!bracket) {
+ goto invalid;
+ }
+
+ *bracket++ = 0;
+
+ if(*bracket) {
+ goto invalid;
+ }
+ }
+
+ // Connect to the meshlink daemon mentioned in the URL.
+ struct addrinfo *ai = str2addrinfo(address, port, SOCK_STREAM);
+
+ if(ai) {
+ for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
+ mesh->sock = socket(aip->ai_family, aip->ai_socktype, aip->ai_protocol);
+
+ if(mesh->sock == -1) {
+ logger(mesh, MESHLINK_DEBUG, "Could not open socket: %s\n", strerror(errno));
+ meshlink_errno = MESHLINK_ENETWORK;
+ continue;
+ }
+
+ set_timeout(mesh->sock, 5000);
+
+ if(connect(mesh->sock, aip->ai_addr, aip->ai_addrlen)) {
+ logger(mesh, MESHLINK_DEBUG, "Could not connect to %s port %s: %s\n", address, port, strerror(errno));
+ meshlink_errno = MESHLINK_ENETWORK;
+ closesocket(mesh->sock);
+ mesh->sock = -1;
+ continue;
+ }
+ }
+
+ freeaddrinfo(ai);
+ } else {
+ meshlink_errno = MESHLINK_ERESOLV;
+ }
+
+ if(mesh->sock != -1 || !comma) {
+ break;
+ }
+
+ address = comma;
}
- freeaddrinfo(ai);
+ if(mesh->sock == -1) {
+ pthread_mutex_unlock(&mesh->mesh_mutex);
+ return false;
+ }
logger(mesh, MESHLINK_DEBUG, "Connected to %s port %s...\n", address, port);
mesh->blen = 0;
- if(!sendline(mesh->sock, "0 ?%s %d.%d", b64key, PROT_MAJOR, 1)) {
+ if(!sendline(mesh->sock, "0 ?%s %d.%d %s", b64key, PROT_MAJOR, 1, mesh->appname)) {
logger(mesh, MESHLINK_DEBUG, "Error sending request to %s port %s: %s\n", address, port, strerror(errno));
closesocket(mesh->sock);
meshlink_errno = MESHLINK_ENETWORK;
return true;
invalid:
- logger(mesh, MESHLINK_DEBUG, "Invalid invitation URL or you are already connected to a Mesh ?\n");
+ logger(mesh, MESHLINK_DEBUG, "Invalid invitation URL\n");
meshlink_errno = MESHLINK_EINVAL;
pthread_mutex_unlock(&(mesh->mesh_mutex));
return false;
//Make blacklisting persistent in the config file
append_config_file(mesh, n->name, "blacklisted", "yes");
+ //Immediately terminate any connections we have with the blacklisted node
+ for list_each(connection_t, c, mesh->connections) {
+ if(c->node == n) {
+ terminate_connection(mesh, c, c->status.active);
+ }
+ }
+
pthread_mutex_unlock(&(mesh->mesh_mutex));
- return;
}
void meshlink_whitelist(meshlink_handle_t *mesh, meshlink_node_t *node) {
static ssize_t channel_send(struct utcp *utcp, const void *data, size_t len) {
node_t *n = utcp->priv;
+
+ if(n->status.destroyed) {
+ return -1;
+ }
+
meshlink_handle_t *mesh = n->mesh;
return meshlink_send(mesh, (meshlink_node_t *)n, data, len) ? (ssize_t)len : -1;
}
}
}
+void handle_duplicate_node(meshlink_handle_t *mesh, node_t *n) {
+ if(!mesh->node_duplicate_cb || n->status.duplicate) {
+ return;
+ }
+
+ n->status.duplicate = true;
+ mesh->node_duplicate_cb(mesh, (meshlink_node_t *)n);
+}
+
void meshlink_enable_discovery(meshlink_handle_t *mesh, bool enable) {
+#if HAVE_CATTA
+
if(!mesh) {
meshlink_errno = MESHLINK_EINVAL;
return;
end:
pthread_mutex_unlock(&mesh->mesh_mutex);
+#else
+ (void)mesh;
+ (void)enable;
+ meshlink_errno = MESHLINK_ENOTSUP;
+#endif
}
static void __attribute__((constructor)) meshlink_init(void) {
projects / meshlink / blobdiff