2 meshlink.c -- Implementation of the MeshLink API.
3 Copyright (C) 2014-2018 Guus Sliepen <guus@meshlink.io>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
26 #include "meshlink_internal.h"
37 #include "ed25519/sha512.h"
38 #include "discovery.h"
42 #define MSG_NOSIGNAL 0
44 __thread meshlink_errno_t meshlink_errno;
45 meshlink_log_cb_t global_log_cb;
46 meshlink_log_level_t global_log_level;
48 typedef bool (*search_node_by_condition_t)(const node_t *, const void *);
50 static int rstrip(char *value) {
51 int len = strlen(value);
53 while(len && strchr("\t\r\n ", value[len - 1])) {
60 static void get_canonical_address(node_t *n, char **hostname, char **port) {
61 if(!n->canonical_address) {
65 *hostname = xstrdup(n->canonical_address);
66 char *space = strchr(*hostname, ' ');
70 *port = xstrdup(space);
74 static bool is_valid_hostname(const char *hostname) {
79 for(const char *p = hostname; *p; p++) {
80 if(!(isalnum(*p) || *p == '-' || *p == '.' || *p == ':')) {
88 static bool is_valid_port(const char *port) {
95 unsigned long int result = strtoul(port, &end, 10);
96 return result && result < 65536 && !*end;
99 for(const char *p = port; *p; p++) {
100 if(!(isalnum(*p) || *p == '-')) {
108 static void set_timeout(int sock, int timeout) {
113 tv.tv_sec = timeout / 1000;
114 tv.tv_usec = (timeout - tv.tv_sec * 1000) * 1000;
116 setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
117 setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
120 struct socket_in_netns_params {
129 static void *socket_in_netns_thread(void *arg) {
130 struct socket_in_netns_params *params = arg;
132 if(setns(params->netns, CLONE_NEWNET) == -1) {
133 meshlink_errno = MESHLINK_EINVAL;
137 params->fd = socket(params->domain, params->type, params->protocol);
143 static int socket_in_netns(int domain, int type, int protocol, int netns) {
145 return socket(domain, type, protocol);
149 struct socket_in_netns_params params = {domain, type, protocol, netns, -1};
153 if(pthread_create(&thr, NULL, socket_in_netns_thread, ¶ms) == 0) {
154 pthread_join(thr, NULL);
164 // Find out what local address a socket would use if we connect to the given address.
165 // We do this using connect() on a UDP socket, so the kernel has to resolve the address
166 // of both endpoints, but this will actually not send any UDP packet.
167 static bool getlocaladdr(char *destaddr, sockaddr_t *sa, socklen_t *salen, int netns) {
168 struct addrinfo *rai = NULL;
169 const struct addrinfo hint = {
170 .ai_family = AF_UNSPEC,
171 .ai_socktype = SOCK_DGRAM,
172 .ai_protocol = IPPROTO_UDP,
175 if(getaddrinfo(destaddr, "80", &hint, &rai) || !rai) {
179 int sock = socket_in_netns(rai->ai_family, rai->ai_socktype, rai->ai_protocol, netns);
186 if(connect(sock, rai->ai_addr, rai->ai_addrlen) && !sockwouldblock(errno)) {
194 if(getsockname(sock, &sa->sa, salen)) {
203 static bool getlocaladdrname(char *destaddr, char *host, socklen_t hostlen, int netns) {
205 socklen_t salen = sizeof(sa);
207 if(!getlocaladdr(destaddr, &sa, &salen, netns)) {
211 if(getnameinfo(&sa.sa, salen, host, hostlen, NULL, 0, NI_NUMERICHOST | NI_NUMERICSERV)) {
218 char *meshlink_get_external_address(meshlink_handle_t *mesh) {
219 return meshlink_get_external_address_for_family(mesh, AF_UNSPEC);
222 char *meshlink_get_external_address_for_family(meshlink_handle_t *mesh, int family) {
223 char *hostname = NULL;
225 logger(mesh, MESHLINK_DEBUG, "Trying to discover externally visible hostname...\n");
226 struct addrinfo *ai = str2addrinfo("meshlink.io", "80", SOCK_STREAM);
227 static const char request[] = "GET http://www.meshlink.io/host.cgi HTTP/1.0\r\n\r\n";
230 for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
231 if(family != AF_UNSPEC && aip->ai_family != family) {
235 int s = socket_in_netns(aip->ai_family, aip->ai_socktype, aip->ai_protocol, mesh->netns);
238 set_timeout(s, 5000);
240 if(connect(s, aip->ai_addr, aip->ai_addrlen)) {
247 send(s, request, sizeof(request) - 1, 0);
248 int len = recv(s, line, sizeof(line) - 1, MSG_WAITALL);
253 if(line[len - 1] == '\n') {
257 char *p = strrchr(line, '\n');
260 hostname = xstrdup(p + 1);
276 // Check that the hostname is reasonable
277 if(hostname && !is_valid_hostname(hostname)) {
283 meshlink_errno = MESHLINK_ERESOLV;
289 char *meshlink_get_local_address_for_family(meshlink_handle_t *mesh, int family) {
292 // Determine address of the local interface used for outgoing connections.
293 char localaddr[NI_MAXHOST];
294 bool success = false;
296 if(family == AF_INET) {
297 success = getlocaladdrname("93.184.216.34", localaddr, sizeof(localaddr), mesh->netns);
298 } else if(family == AF_INET6) {
299 success = getlocaladdrname("2606:2800:220:1:248:1893:25c8:1946", localaddr, sizeof(localaddr), mesh->netns);
303 meshlink_errno = MESHLINK_ENETWORK;
307 return xstrdup(localaddr);
310 void remove_duplicate_hostnames(char *host[], char *port[], int n) {
311 for(int i = 0; i < n; i++) {
316 // Ignore duplicate hostnames
319 for(int j = 0; j < i; j++) {
324 if(strcmp(host[i], host[j])) {
328 if(strcmp(port[i], port[j])) {
336 if(found || !is_valid_hostname(host[i])) {
346 // This gets the hostname part for use in invitation URLs
347 static char *get_my_hostname(meshlink_handle_t *mesh, uint32_t flags) {
348 char *hostname[4] = {NULL};
349 char *port[4] = {NULL};
350 char *hostport = NULL;
352 if(!(flags & (MESHLINK_INVITE_LOCAL | MESHLINK_INVITE_PUBLIC))) {
353 flags |= MESHLINK_INVITE_LOCAL | MESHLINK_INVITE_PUBLIC;
356 if(!(flags & (MESHLINK_INVITE_IPV4 | MESHLINK_INVITE_IPV6))) {
357 flags |= MESHLINK_INVITE_IPV4 | MESHLINK_INVITE_IPV6;
360 // Add local addresses if requested
361 if(flags & MESHLINK_INVITE_LOCAL) {
362 if(flags & MESHLINK_INVITE_IPV4) {
363 hostname[0] = meshlink_get_local_address_for_family(mesh, AF_INET);
366 if(flags & MESHLINK_INVITE_IPV6) {
367 hostname[1] = meshlink_get_local_address_for_family(mesh, AF_INET6);
371 // Add public/canonical addresses if requested
372 if(flags & MESHLINK_INVITE_PUBLIC) {
373 // Try the CanonicalAddress first
374 get_canonical_address(mesh->self, &hostname[2], &port[2]);
377 if(flags & MESHLINK_INVITE_IPV4) {
378 hostname[2] = meshlink_get_external_address_for_family(mesh, AF_INET);
381 if(flags & MESHLINK_INVITE_IPV6) {
382 hostname[3] = meshlink_get_external_address_for_family(mesh, AF_INET6);
387 for(int i = 0; i < 4; i++) {
388 // Ensure we always have a port number
389 if(hostname[i] && !port[i]) {
390 port[i] = xstrdup(mesh->myport);
394 remove_duplicate_hostnames(hostname, port, 4);
396 // Resolve the hostnames
397 for(int i = 0; i < 4; i++) {
402 // Convert what we have to a sockaddr
403 struct addrinfo *ai_in, *ai_out;
404 struct addrinfo hint = {
405 .ai_family = AF_UNSPEC,
406 .ai_flags = AI_NUMERICSERV,
407 .ai_socktype = SOCK_STREAM,
409 int err = getaddrinfo(hostname[i], port[i], &hint, &ai_in);
415 // Remember the address
416 node_add_recent_address(mesh, mesh->self, (sockaddr_t *)ai_in->ai_addr);
418 if(flags & MESHLINK_INVITE_NUMERIC) {
419 // We don't need to do any further conversion
424 // Convert it to a hostname
425 char resolved_host[NI_MAXHOST];
426 char resolved_port[NI_MAXSERV];
427 err = getnameinfo(ai_in->ai_addr, ai_in->ai_addrlen, resolved_host, sizeof resolved_host, resolved_port, sizeof resolved_port, NI_NUMERICSERV);
429 if(err || !is_valid_hostname(resolved_host)) {
434 // Convert the hostname back to a sockaddr
435 hint.ai_family = ai_in->ai_family;
436 err = getaddrinfo(resolved_host, resolved_port, &hint, &ai_out);
443 // Check if it's still the same sockaddr
444 if(ai_in->ai_addrlen != ai_out->ai_addrlen || memcmp(ai_in->ai_addr, ai_out->ai_addr, ai_in->ai_addrlen)) {
446 freeaddrinfo(ai_out);
450 // Yes: replace the hostname with the resolved one
452 hostname[i] = xstrdup(resolved_host);
455 freeaddrinfo(ai_out);
458 // Remove duplicates again, since IPv4 and IPv6 addresses might map to the same hostname
459 remove_duplicate_hostnames(hostname, port, 4);
461 // Concatenate all unique address to the hostport string
462 for(int i = 0; i < 4; i++) {
467 // Append the address to the hostport string
469 xasprintf(&newhostport, (strchr(hostname[i], ':') ? "%s%s[%s]:%s" : "%s%s%s:%s"), hostport ? hostport : "", hostport ? "," : "", hostname[i], port[i]);
471 hostport = newhostport;
480 static bool try_bind(int port) {
481 struct addrinfo *ai = NULL;
482 struct addrinfo hint = {
483 .ai_flags = AI_PASSIVE,
484 .ai_family = AF_UNSPEC,
485 .ai_socktype = SOCK_STREAM,
486 .ai_protocol = IPPROTO_TCP,
490 snprintf(portstr, sizeof(portstr), "%d", port);
492 if(getaddrinfo(NULL, portstr, &hint, &ai) || !ai) {
497 for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
498 int fd = socket(aip->ai_family, SOCK_STREAM, IPPROTO_TCP);
505 int result = bind(fd, aip->ai_addr, aip->ai_addrlen);
518 static int check_port(meshlink_handle_t *mesh) {
519 for(int i = 0; i < 1000; i++) {
520 int port = 0x1000 + prng(mesh, 0x8000);
524 xasprintf(&mesh->myport, "%d", port);
529 meshlink_errno = MESHLINK_ENETWORK;
530 logger(mesh, MESHLINK_DEBUG, "Could not find any available network port.\n");
534 static bool write_main_config_files(meshlink_handle_t *mesh) {
535 if(!mesh->confbase) {
541 /* Write the main config file */
542 packmsg_output_t out = {buf, sizeof buf};
544 packmsg_add_uint32(&out, MESHLINK_CONFIG_VERSION);
545 packmsg_add_str(&out, mesh->name);
546 packmsg_add_bin(&out, ecdsa_get_private_key(mesh->private_key), 96);
547 packmsg_add_bin(&out, ecdsa_get_private_key(mesh->invitation_key), 96);
548 packmsg_add_uint16(&out, atoi(mesh->myport));
550 if(!packmsg_output_ok(&out)) {
554 config_t config = {buf, packmsg_output_size(&out, buf)};
556 if(!main_config_write(mesh, "current", &config, mesh->config_key)) {
560 /* Write our own host config file */
561 if(!node_write_config(mesh, mesh->self)) {
568 static bool finalize_join(meshlink_handle_t *mesh, const void *buf, uint16_t len) {
569 packmsg_input_t in = {buf, len};
570 uint32_t version = packmsg_get_uint32(&in);
572 if(version != MESHLINK_INVITATION_VERSION) {
573 logger(mesh, MESHLINK_ERROR, "Invalid invitation version!\n");
577 char *name = packmsg_get_str_dup(&in);
578 packmsg_skip_element(&in); /* submesh */
579 dev_class_t devclass = packmsg_get_int32(&in);
580 uint32_t count = packmsg_get_array(&in);
583 logger(mesh, MESHLINK_DEBUG, "No Name found in invitation!\n");
587 if(!check_id(name)) {
588 logger(mesh, MESHLINK_DEBUG, "Invalid Name found in invitation: %s!\n", name);
594 logger(mesh, MESHLINK_ERROR, "Incomplete invitation file!\n");
600 free(mesh->self->name);
602 mesh->self->name = xstrdup(name);
603 mesh->self->devclass = devclass == DEV_CLASS_UNKNOWN ? mesh->devclass : devclass;
605 // Initialize configuration directory
606 if(!config_init(mesh, "current")) {
610 if(!write_main_config_files(mesh)) {
614 // Write host config files
617 uint32_t len = packmsg_get_bin_raw(&in, &data);
620 logger(mesh, MESHLINK_ERROR, "Incomplete invitation file!\n");
624 packmsg_input_t in2 = {data, len};
625 uint32_t version = packmsg_get_uint32(&in2);
626 char *name = packmsg_get_str_dup(&in2);
628 if(!packmsg_input_ok(&in2) || version != MESHLINK_CONFIG_VERSION || !check_id(name)) {
630 packmsg_input_invalidate(&in);
634 if(!check_id(name)) {
639 if(!strcmp(name, mesh->name)) {
640 logger(mesh, MESHLINK_DEBUG, "Secondary chunk would overwrite our own host config file.\n");
642 meshlink_errno = MESHLINK_EPEER;
646 node_t *n = new_node();
649 config_t config = {data, len};
651 if(!node_read_from_config(mesh, n, &config)) {
653 logger(mesh, MESHLINK_ERROR, "Invalid host config file in invitation file!\n");
654 meshlink_errno = MESHLINK_EPEER;
660 if(!config_write(mesh, "current", n->name, &config, mesh->config_key)) {
665 /* Ensure the configuration directory metadata is on disk */
666 if(!config_sync(mesh, "current") || !sync_path(mesh->confbase)) {
670 sptps_send_record(&mesh->sptps, 1, ecdsa_get_public_key(mesh->private_key), 32);
672 logger(mesh, MESHLINK_DEBUG, "Configuration stored in: %s\n", mesh->confbase);
677 static bool invitation_send(void *handle, uint8_t type, const void *data, size_t len) {
679 meshlink_handle_t *mesh = handle;
680 const char *ptr = data;
683 int result = send(mesh->sock, ptr, len, 0);
685 if(result == -1 && errno == EINTR) {
687 } else if(result <= 0) {
698 static bool invitation_receive(void *handle, uint8_t type, const void *msg, uint16_t len) {
699 meshlink_handle_t *mesh = handle;
702 case SPTPS_HANDSHAKE:
703 return sptps_send_record(&mesh->sptps, 0, mesh->cookie, sizeof(mesh)->cookie);
706 return finalize_join(mesh, msg, len);
709 logger(mesh, MESHLINK_DEBUG, "Invitation succesfully accepted.\n");
710 shutdown(mesh->sock, SHUT_RDWR);
711 mesh->success = true;
721 static bool recvline(meshlink_handle_t *mesh, size_t len) {
722 char *newline = NULL;
728 while(!(newline = memchr(mesh->buffer, '\n', mesh->blen))) {
729 int result = recv(mesh->sock, mesh->buffer + mesh->blen, sizeof(mesh)->buffer - mesh->blen, 0);
731 if(result == -1 && errno == EINTR) {
733 } else if(result <= 0) {
737 mesh->blen += result;
740 if((size_t)(newline - mesh->buffer) >= len) {
744 len = newline - mesh->buffer;
746 memcpy(mesh->line, mesh->buffer, len);
748 memmove(mesh->buffer, newline + 1, mesh->blen - len - 1);
749 mesh->blen -= len + 1;
754 static bool sendline(int fd, char *format, ...) {
760 va_start(ap, format);
761 blen = vsnprintf(buffer, sizeof(buffer), format, ap);
764 if(blen < 1 || (size_t)blen >= sizeof(buffer)) {
772 int result = send(fd, p, blen, MSG_NOSIGNAL);
774 if(result == -1 && errno == EINTR) {
776 } else if(result <= 0) {
787 static const char *errstr[] = {
788 [MESHLINK_OK] = "No error",
789 [MESHLINK_EINVAL] = "Invalid argument",
790 [MESHLINK_ENOMEM] = "Out of memory",
791 [MESHLINK_ENOENT] = "No such node",
792 [MESHLINK_EEXIST] = "Node already exists",
793 [MESHLINK_EINTERNAL] = "Internal error",
794 [MESHLINK_ERESOLV] = "Could not resolve hostname",
795 [MESHLINK_ESTORAGE] = "Storage error",
796 [MESHLINK_ENETWORK] = "Network error",
797 [MESHLINK_EPEER] = "Error communicating with peer",
798 [MESHLINK_ENOTSUP] = "Operation not supported",
799 [MESHLINK_EBUSY] = "MeshLink instance already in use",
800 [MESHLINK_EBLACKLISTED] = "Node is blacklisted",
803 const char *meshlink_strerror(meshlink_errno_t err) {
804 if((int)err < 0 || err >= sizeof(errstr) / sizeof(*errstr)) {
805 return "Invalid error code";
811 static bool ecdsa_keygen(meshlink_handle_t *mesh) {
812 logger(mesh, MESHLINK_DEBUG, "Generating ECDSA keypairs:\n");
814 mesh->private_key = ecdsa_generate();
815 mesh->invitation_key = ecdsa_generate();
817 if(!mesh->private_key || !mesh->invitation_key) {
818 logger(mesh, MESHLINK_DEBUG, "Error during key generation!\n");
819 meshlink_errno = MESHLINK_EINTERNAL;
823 logger(mesh, MESHLINK_DEBUG, "Done.\n");
828 static struct timeval idle(event_loop_t *loop, void *data) {
830 meshlink_handle_t *mesh = data;
831 struct timeval t, tmin = {3600, 0};
833 for splay_each(node_t, n, mesh->nodes) {
838 t = utcp_timeout(n->utcp);
840 if(timercmp(&t, &tmin, <)) {
848 // Get our local address(es) by simulating connecting to an Internet host.
849 static void add_local_addresses(meshlink_handle_t *mesh) {
851 sa.storage.ss_family = AF_UNKNOWN;
852 socklen_t salen = sizeof(sa);
856 if(getlocaladdr("93.184.216.34", &sa, &salen, mesh->netns)) {
857 sa.in.sin_port = ntohs(atoi(mesh->myport));
858 node_add_recent_address(mesh, mesh->self, &sa);
865 if(getlocaladdr("2606:2800:220:1:248:1893:25c8:1946", &sa, &salen, mesh->netns)) {
866 sa.in6.sin6_port = ntohs(atoi(mesh->myport));
867 node_add_recent_address(mesh, mesh->self, &sa);
871 static bool meshlink_setup(meshlink_handle_t *mesh) {
872 if(!config_destroy(mesh->confbase, "new")) {
873 logger(mesh, MESHLINK_ERROR, "Could not delete configuration in %s/new: %s\n", mesh->confbase, strerror(errno));
874 meshlink_errno = MESHLINK_ESTORAGE;
878 if(!config_destroy(mesh->confbase, "old")) {
879 logger(mesh, MESHLINK_ERROR, "Could not delete configuration in %s/old: %s\n", mesh->confbase, strerror(errno));
880 meshlink_errno = MESHLINK_ESTORAGE;
884 if(!config_init(mesh, "current")) {
885 logger(mesh, MESHLINK_ERROR, "Could not set up configuration in %s/current: %s\n", mesh->confbase, strerror(errno));
886 meshlink_errno = MESHLINK_ESTORAGE;
890 if(!ecdsa_keygen(mesh)) {
891 meshlink_errno = MESHLINK_EINTERNAL;
895 if(check_port(mesh) == 0) {
896 meshlink_errno = MESHLINK_ENETWORK;
900 /* Create a node for ourself */
902 mesh->self = new_node();
903 mesh->self->name = xstrdup(mesh->name);
904 mesh->self->devclass = mesh->devclass;
905 mesh->self->ecdsa = ecdsa_set_public_key(ecdsa_get_public_key(mesh->private_key));
906 mesh->self->session_id = mesh->session_id;
908 if(!write_main_config_files(mesh)) {
909 logger(mesh, MESHLINK_ERROR, "Could not write main config files into %s/current: %s\n", mesh->confbase, strerror(errno));
910 meshlink_errno = MESHLINK_ESTORAGE;
914 /* Ensure the configuration directory metadata is on disk */
915 if(!config_sync(mesh, "current")) {
922 static bool meshlink_read_config(meshlink_handle_t *mesh) {
925 if(!main_config_read(mesh, "current", &config, mesh->config_key)) {
926 logger(NULL, MESHLINK_ERROR, "Could not read main configuration file!");
930 packmsg_input_t in = {config.buf, config.len};
931 const void *private_key;
932 const void *invitation_key;
934 uint32_t version = packmsg_get_uint32(&in);
935 char *name = packmsg_get_str_dup(&in);
936 uint32_t private_key_len = packmsg_get_bin_raw(&in, &private_key);
937 uint32_t invitation_key_len = packmsg_get_bin_raw(&in, &invitation_key);
938 uint16_t myport = packmsg_get_uint16(&in);
940 if(!packmsg_done(&in) || version != MESHLINK_CONFIG_VERSION || private_key_len != 96 || invitation_key_len != 96) {
941 logger(NULL, MESHLINK_ERROR, "Error parsing main configuration file!");
943 config_free(&config);
950 if(mesh->name && strcmp(mesh->name, name)) {
951 logger(NULL, MESHLINK_ERROR, "Configuration is for a different name (%s)!", name);
952 meshlink_errno = MESHLINK_ESTORAGE;
954 config_free(&config);
962 xasprintf(&mesh->myport, "%u", myport);
963 mesh->private_key = ecdsa_set_private_key(private_key);
964 mesh->invitation_key = ecdsa_set_private_key(invitation_key);
965 config_free(&config);
967 /* Create a node for ourself and read our host configuration file */
969 mesh->self = new_node();
970 mesh->self->name = xstrdup(name);
971 mesh->self->devclass = mesh->devclass;
972 mesh->self->session_id = mesh->session_id;
974 if(!node_read_public_key(mesh, mesh->self)) {
975 logger(NULL, MESHLINK_ERROR, "Could not read our host configuration file!");
976 meshlink_errno = MESHLINK_ESTORAGE;
977 free_node(mesh->self);
986 static void *setup_network_in_netns_thread(void *arg) {
987 meshlink_handle_t *mesh = arg;
989 if(setns(mesh->netns, CLONE_NEWNET) != 0) {
993 bool success = setup_network(mesh);
994 add_local_addresses(mesh);
995 return success ? arg : NULL;
999 meshlink_open_params_t *meshlink_open_params_init(const char *confbase, const char *name, const char *appname, dev_class_t devclass) {
1000 if(!confbase || !*confbase) {
1001 logger(NULL, MESHLINK_ERROR, "No confbase given!\n");
1002 meshlink_errno = MESHLINK_EINVAL;
1006 if(!appname || !*appname) {
1007 logger(NULL, MESHLINK_ERROR, "No appname given!\n");
1008 meshlink_errno = MESHLINK_EINVAL;
1012 if(strchr(appname, ' ')) {
1013 logger(NULL, MESHLINK_ERROR, "Invalid appname given!\n");
1014 meshlink_errno = MESHLINK_EINVAL;
1018 if(!name || !*name) {
1019 logger(NULL, MESHLINK_ERROR, "No name given!\n");
1020 meshlink_errno = MESHLINK_EINVAL;
1024 if(!check_id(name)) {
1025 logger(NULL, MESHLINK_ERROR, "Invalid name given!\n");
1026 meshlink_errno = MESHLINK_EINVAL;
1030 if(devclass < 0 || devclass >= DEV_CLASS_COUNT) {
1031 logger(NULL, MESHLINK_ERROR, "Invalid devclass given!\n");
1032 meshlink_errno = MESHLINK_EINVAL;
1036 meshlink_open_params_t *params = xzalloc(sizeof * params);
1038 params->confbase = xstrdup(confbase);
1039 params->name = xstrdup(name);
1040 params->appname = xstrdup(appname);
1041 params->devclass = devclass;
1047 bool meshlink_open_params_set_netns(meshlink_open_params_t *params, int netns) {
1049 meshlink_errno = MESHLINK_EINVAL;
1053 params->netns = netns;
1058 bool meshlink_open_params_set_storage_key(meshlink_open_params_t *params, const void *key, size_t keylen) {
1060 meshlink_errno = MESHLINK_EINVAL;
1064 if((!key && keylen) || (key && !keylen)) {
1065 logger(NULL, MESHLINK_ERROR, "Invalid key length!\n");
1066 meshlink_errno = MESHLINK_EINVAL;
1071 params->keylen = keylen;
1076 bool meshlink_encrypted_key_rotate(meshlink_handle_t *mesh, const void *new_key, size_t new_keylen) {
1077 if(!mesh || !new_key || !new_keylen) {
1078 logger(mesh, MESHLINK_ERROR, "Invalid arguments given!\n");
1079 meshlink_errno = MESHLINK_EINVAL;
1083 pthread_mutex_lock(&mesh->mutex);
1085 // Create hash for the new key
1086 void *new_config_key;
1087 new_config_key = xmalloc(CHACHA_POLY1305_KEYLEN);
1089 if(!prf(new_key, new_keylen, "MeshLink configuration key", 26, new_config_key, CHACHA_POLY1305_KEYLEN)) {
1090 logger(mesh, MESHLINK_ERROR, "Error creating new configuration key!\n");
1091 meshlink_errno = MESHLINK_EINTERNAL;
1092 pthread_mutex_unlock(&mesh->mutex);
1096 // Copy contents of the "current" confbase sub-directory to "new" confbase sub-directory with the new key
1098 if(!config_copy(mesh, "current", mesh->config_key, "new", new_config_key)) {
1099 logger(mesh, MESHLINK_ERROR, "Could not set up configuration in %s/old: %s\n", mesh->confbase, strerror(errno));
1100 meshlink_errno = MESHLINK_ESTORAGE;
1101 pthread_mutex_unlock(&mesh->mutex);
1105 devtool_keyrotate_probe(1);
1107 // Rename confbase/current/ to confbase/old
1109 if(!config_rename(mesh, "current", "old")) {
1110 logger(mesh, MESHLINK_ERROR, "Cannot rename %s/current to %s/old\n", mesh->confbase, mesh->confbase);
1111 meshlink_errno = MESHLINK_ESTORAGE;
1112 pthread_mutex_unlock(&mesh->mutex);
1116 devtool_keyrotate_probe(2);
1118 // Rename confbase/new/ to confbase/current
1120 if(!config_rename(mesh, "new", "current")) {
1121 logger(mesh, MESHLINK_ERROR, "Cannot rename %s/new to %s/current\n", mesh->confbase, mesh->confbase);
1122 meshlink_errno = MESHLINK_ESTORAGE;
1123 pthread_mutex_unlock(&mesh->mutex);
1127 devtool_keyrotate_probe(3);
1129 // Cleanup the "old" confbase sub-directory
1131 if(!config_destroy(mesh->confbase, "old")) {
1132 pthread_mutex_unlock(&mesh->mutex);
1136 // Change the mesh handle key with new key
1138 free(mesh->config_key);
1139 mesh->config_key = new_config_key;
1141 pthread_mutex_unlock(&mesh->mutex);
1146 void meshlink_open_params_free(meshlink_open_params_t *params) {
1148 meshlink_errno = MESHLINK_EINVAL;
1152 free(params->confbase);
1154 free(params->appname);
1159 /// Device class traits
1160 static const dev_class_traits_t default_class_traits[DEV_CLASS_COUNT] = {
1161 { .pingtimeout = 5, .pinginterval = 60, .min_connects = 3, .max_connects = 10000, .edge_weight = 1 }, // DEV_CLASS_BACKBONE
1162 { .pingtimeout = 5, .pinginterval = 60, .min_connects = 3, .max_connects = 100, .edge_weight = 3 }, // DEV_CLASS_STATIONARY
1163 { .pingtimeout = 5, .pinginterval = 60, .min_connects = 3, .max_connects = 3, .edge_weight = 6 }, // DEV_CLASS_PORTABLE
1164 { .pingtimeout = 5, .pinginterval = 60, .min_connects = 1, .max_connects = 1, .edge_weight = 9 }, // DEV_CLASS_UNKNOWN
1167 meshlink_handle_t *meshlink_open(const char *confbase, const char *name, const char *appname, dev_class_t devclass) {
1168 if(!confbase || !*confbase) {
1169 logger(NULL, MESHLINK_ERROR, "No confbase given!\n");
1170 meshlink_errno = MESHLINK_EINVAL;
1174 /* Create a temporary struct on the stack, to avoid allocating and freeing one. */
1175 meshlink_open_params_t params;
1176 memset(¶ms, 0, sizeof(params));
1178 params.confbase = (char *)confbase;
1179 params.name = (char *)name;
1180 params.appname = (char *)appname;
1181 params.devclass = devclass;
1184 return meshlink_open_ex(¶ms);
1187 meshlink_handle_t *meshlink_open_encrypted(const char *confbase, const char *name, const char *appname, dev_class_t devclass, const void *key, size_t keylen) {
1188 if(!confbase || !*confbase) {
1189 logger(NULL, MESHLINK_ERROR, "No confbase given!\n");
1190 meshlink_errno = MESHLINK_EINVAL;
1194 /* Create a temporary struct on the stack, to avoid allocating and freeing one. */
1195 meshlink_open_params_t params;
1196 memset(¶ms, 0, sizeof(params));
1198 params.confbase = (char *)confbase;
1199 params.name = (char *)name;
1200 params.appname = (char *)appname;
1201 params.devclass = devclass;
1204 if(!meshlink_open_params_set_storage_key(¶ms, key, keylen)) {
1208 return meshlink_open_ex(¶ms);
1211 meshlink_handle_t *meshlink_open_ephemeral(const char *name, const char *appname, dev_class_t devclass) {
1212 /* Create a temporary struct on the stack, to avoid allocating and freeing one. */
1213 meshlink_open_params_t params;
1214 memset(¶ms, 0, sizeof(params));
1216 params.name = (char *)name;
1217 params.appname = (char *)appname;
1218 params.devclass = devclass;
1221 return meshlink_open_ex(¶ms);
1224 meshlink_handle_t *meshlink_open_ex(const meshlink_open_params_t *params) {
1225 // Validate arguments provided by the application
1226 bool usingname = false;
1228 logger(NULL, MESHLINK_DEBUG, "meshlink_open called\n");
1230 if(!params->appname || !*params->appname) {
1231 logger(NULL, MESHLINK_ERROR, "No appname given!\n");
1232 meshlink_errno = MESHLINK_EINVAL;
1236 if(strchr(params->appname, ' ')) {
1237 logger(NULL, MESHLINK_ERROR, "Invalid appname given!\n");
1238 meshlink_errno = MESHLINK_EINVAL;
1242 if(!params->name || !*params->name) {
1243 logger(NULL, MESHLINK_ERROR, "No name given!\n");
1245 } else { //check name only if there is a name != NULL
1247 if(!check_id(params->name)) {
1248 logger(NULL, MESHLINK_ERROR, "Invalid name given!\n");
1249 meshlink_errno = MESHLINK_EINVAL;
1256 if(params->devclass < 0 || params->devclass >= DEV_CLASS_COUNT) {
1257 logger(NULL, MESHLINK_ERROR, "Invalid devclass given!\n");
1258 meshlink_errno = MESHLINK_EINVAL;
1262 if((params->key && !params->keylen) || (!params->key && params->keylen)) {
1263 logger(NULL, MESHLINK_ERROR, "Invalid key length!\n");
1264 meshlink_errno = MESHLINK_EINVAL;
1268 meshlink_handle_t *mesh = xzalloc(sizeof(meshlink_handle_t));
1270 if(params->confbase) {
1271 mesh->confbase = xstrdup(params->confbase);
1274 mesh->appname = xstrdup(params->appname);
1275 mesh->devclass = params->devclass;
1276 mesh->discovery = true;
1277 mesh->invitation_timeout = 604800; // 1 week
1278 mesh->netns = params->netns;
1279 mesh->submeshes = NULL;
1280 mesh->log_cb = global_log_cb;
1281 mesh->log_level = global_log_level;
1283 randomize(&mesh->prng_state, sizeof(mesh->prng_state));
1286 randomize(&mesh->session_id, sizeof(mesh->session_id));
1287 } while(mesh->session_id == 0);
1289 memcpy(mesh->dev_class_traits, default_class_traits, sizeof(default_class_traits));
1292 mesh->name = xstrdup(params->name);
1297 mesh->config_key = xmalloc(CHACHA_POLY1305_KEYLEN);
1299 if(!prf(params->key, params->keylen, "MeshLink configuration key", 26, mesh->config_key, CHACHA_POLY1305_KEYLEN)) {
1300 logger(NULL, MESHLINK_ERROR, "Error creating configuration key!\n");
1301 meshlink_close(mesh);
1302 meshlink_errno = MESHLINK_EINTERNAL;
1308 pthread_mutexattr_t attr;
1309 pthread_mutexattr_init(&attr);
1310 pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
1311 pthread_mutex_init(&mesh->mutex, &attr);
1313 mesh->threadstarted = false;
1314 event_loop_init(&mesh->loop);
1315 mesh->loop.data = mesh;
1317 meshlink_queue_init(&mesh->outpacketqueue);
1319 // Atomically lock the configuration directory.
1320 if(!main_config_lock(mesh)) {
1321 meshlink_close(mesh);
1325 // If no configuration exists yet, create it.
1327 if(!meshlink_confbase_exists(mesh)) {
1328 if(!meshlink_setup(mesh)) {
1329 logger(NULL, MESHLINK_ERROR, "Cannot create initial configuration\n");
1330 meshlink_close(mesh);
1334 if(!meshlink_read_config(mesh)) {
1335 logger(NULL, MESHLINK_ERROR, "Cannot read main configuration\n");
1336 meshlink_close(mesh);
1342 struct WSAData wsa_state;
1343 WSAStartup(MAKEWORD(2, 2), &wsa_state);
1346 // Setup up everything
1347 // TODO: we should not open listening sockets yet
1349 bool success = false;
1351 if(mesh->netns != -1) {
1355 if(pthread_create(&thr, NULL, setup_network_in_netns_thread, mesh) == 0) {
1356 void *retval = NULL;
1357 success = pthread_join(thr, &retval) == 0 && retval;
1361 meshlink_errno = MESHLINK_EINTERNAL;
1364 #endif // HAVE_SETNS
1366 success = setup_network(mesh);
1367 add_local_addresses(mesh);
1371 meshlink_close(mesh);
1372 meshlink_errno = MESHLINK_ENETWORK;
1376 add_local_addresses(mesh);
1378 if(!node_write_config(mesh, mesh->self)) {
1379 logger(NULL, MESHLINK_ERROR, "Cannot update configuration\n");
1383 idle_set(&mesh->loop, idle, mesh);
1385 logger(NULL, MESHLINK_DEBUG, "meshlink_open returning\n");
1389 meshlink_submesh_t *meshlink_submesh_open(meshlink_handle_t *mesh, const char *submesh) {
1390 meshlink_submesh_t *s = NULL;
1393 logger(NULL, MESHLINK_ERROR, "No mesh handle given!\n");
1394 meshlink_errno = MESHLINK_EINVAL;
1398 if(!submesh || !*submesh) {
1399 logger(NULL, MESHLINK_ERROR, "No submesh name given!\n");
1400 meshlink_errno = MESHLINK_EINVAL;
1405 pthread_mutex_lock(&mesh->mutex);
1407 s = (meshlink_submesh_t *)create_submesh(mesh, submesh);
1409 pthread_mutex_unlock(&mesh->mutex);
1414 static void *meshlink_main_loop(void *arg) {
1415 meshlink_handle_t *mesh = arg;
1417 if(mesh->netns != -1) {
1420 if(setns(mesh->netns, CLONE_NEWNET) != 0) {
1421 pthread_cond_signal(&mesh->cond);
1426 pthread_cond_signal(&mesh->cond);
1428 #endif // HAVE_SETNS
1433 if(mesh->discovery) {
1434 discovery_start(mesh);
1439 pthread_mutex_lock(&mesh->mutex);
1441 logger(mesh, MESHLINK_DEBUG, "Starting main_loop...\n");
1442 pthread_cond_broadcast(&mesh->cond);
1444 logger(mesh, MESHLINK_DEBUG, "main_loop returned.\n");
1446 pthread_mutex_unlock(&mesh->mutex);
1451 if(mesh->discovery) {
1452 discovery_stop(mesh);
1460 bool meshlink_start(meshlink_handle_t *mesh) {
1462 assert(mesh->private_key);
1465 meshlink_errno = MESHLINK_EINVAL;
1469 logger(mesh, MESHLINK_DEBUG, "meshlink_start called\n");
1471 pthread_mutex_lock(&mesh->mutex);
1473 assert(mesh->self->ecdsa);
1474 assert(!memcmp((uint8_t *)mesh->self->ecdsa + 64, (uint8_t *)mesh->private_key + 64, 32));
1476 if(mesh->threadstarted) {
1477 logger(mesh, MESHLINK_DEBUG, "thread was already running\n");
1478 pthread_mutex_unlock(&mesh->mutex);
1482 if(mesh->listen_socket[0].tcp.fd < 0) {
1483 logger(mesh, MESHLINK_ERROR, "Listening socket not open\n");
1484 meshlink_errno = MESHLINK_ENETWORK;
1488 mesh->thedatalen = 0;
1490 // TODO: open listening sockets first
1492 //Check that a valid name is set
1494 logger(mesh, MESHLINK_DEBUG, "No name given!\n");
1495 meshlink_errno = MESHLINK_EINVAL;
1496 pthread_mutex_unlock(&mesh->mutex);
1500 init_outgoings(mesh);
1502 // Start the main thread
1504 event_loop_start(&mesh->loop);
1506 if(pthread_create(&mesh->thread, NULL, meshlink_main_loop, mesh) != 0) {
1507 logger(mesh, MESHLINK_DEBUG, "Could not start thread: %s\n", strerror(errno));
1508 memset(&mesh->thread, 0, sizeof(mesh)->thread);
1509 meshlink_errno = MESHLINK_EINTERNAL;
1510 event_loop_stop(&mesh->loop);
1511 pthread_mutex_unlock(&mesh->mutex);
1515 pthread_cond_wait(&mesh->cond, &mesh->mutex);
1516 mesh->threadstarted = true;
1517 mesh->self->last_reachable = time(NULL);
1518 mesh->self->status.dirty = true;
1520 pthread_mutex_unlock(&mesh->mutex);
1524 void meshlink_stop(meshlink_handle_t *mesh) {
1526 meshlink_errno = MESHLINK_EINVAL;
1530 pthread_mutex_lock(&mesh->mutex);
1531 logger(mesh, MESHLINK_DEBUG, "meshlink_stop called\n");
1534 mesh->self->last_unreachable = time(NULL);
1535 mesh->self->status.dirty = true;
1538 // Shut down the main thread
1539 event_loop_stop(&mesh->loop);
1541 // Send ourselves a UDP packet to kick the event loop
1542 for(int i = 0; i < mesh->listen_sockets; i++) {
1544 socklen_t salen = sizeof(sa);
1546 if(getsockname(mesh->listen_socket[i].udp.fd, &sa.sa, &salen) == -1) {
1547 logger(mesh, MESHLINK_ERROR, "System call `%s' failed: %s", "getsockname", sockstrerror(sockerrno));
1551 if(sendto(mesh->listen_socket[i].udp.fd, "", 1, MSG_NOSIGNAL, &sa.sa, salen) == -1) {
1552 logger(mesh, MESHLINK_ERROR, "Could not send a UDP packet to ourself: %s", sockstrerror(sockerrno));
1556 if(mesh->threadstarted) {
1557 // Wait for the main thread to finish
1558 pthread_mutex_unlock(&mesh->mutex);
1559 pthread_join(mesh->thread, NULL);
1560 pthread_mutex_lock(&mesh->mutex);
1562 mesh->threadstarted = false;
1565 // Close all metaconnections
1566 if(mesh->connections) {
1567 for(list_node_t *node = mesh->connections->head, *next; node; node = next) {
1569 connection_t *c = node->data;
1571 terminate_connection(mesh, c, false);
1575 exit_outgoings(mesh);
1577 // Try to write out any changed node config files, ignore errors at this point.
1579 for splay_each(node_t, n, mesh->nodes) {
1580 if(n->status.dirty) {
1581 n->status.dirty = !node_write_config(mesh, n);
1586 pthread_mutex_unlock(&mesh->mutex);
1589 void meshlink_close(meshlink_handle_t *mesh) {
1591 meshlink_errno = MESHLINK_EINVAL;
1595 // stop can be called even if mesh has not been started
1596 meshlink_stop(mesh);
1598 // lock is not released after this
1599 pthread_mutex_lock(&mesh->mutex);
1601 // Close and free all resources used.
1603 close_network_connections(mesh);
1605 logger(mesh, MESHLINK_INFO, "Terminating");
1607 event_loop_exit(&mesh->loop);
1611 if(mesh->confbase) {
1617 ecdsa_free(mesh->invitation_key);
1619 if(mesh->netns != -1) {
1623 for(vpn_packet_t *packet; (packet = meshlink_queue_pop(&mesh->outpacketqueue));) {
1627 meshlink_queue_exit(&mesh->outpacketqueue);
1630 free(mesh->appname);
1631 free(mesh->confbase);
1632 free(mesh->config_key);
1633 ecdsa_free(mesh->private_key);
1635 main_config_unlock(mesh);
1637 pthread_mutex_unlock(&mesh->mutex);
1638 pthread_mutex_destroy(&mesh->mutex);
1640 memset(mesh, 0, sizeof(*mesh));
1645 bool meshlink_destroy(const char *confbase) {
1647 meshlink_errno = MESHLINK_EINVAL;
1651 /* Exit early if the confbase directory itself doesn't exist */
1652 if(access(confbase, F_OK) && errno == ENOENT) {
1656 /* Take the lock the same way meshlink_open() would. */
1657 char lockfilename[PATH_MAX];
1658 snprintf(lockfilename, sizeof(lockfilename), "%s" SLASH "meshlink.lock", confbase);
1660 FILE *lockfile = fopen(lockfilename, "w+");
1663 logger(NULL, MESHLINK_ERROR, "Could not open lock file %s: %s", lockfilename, strerror(errno));
1664 meshlink_errno = MESHLINK_ESTORAGE;
1669 fcntl(fileno(lockfile), F_SETFD, FD_CLOEXEC);
1673 // TODO: use _locking()?
1676 if(flock(fileno(lockfile), LOCK_EX | LOCK_NB) != 0) {
1677 logger(NULL, MESHLINK_ERROR, "Configuration directory %s still in use\n", lockfilename);
1679 meshlink_errno = MESHLINK_EBUSY;
1685 if(!config_destroy(confbase, "current") || !config_destroy(confbase, "new") || !config_destroy(confbase, "old")) {
1686 logger(NULL, MESHLINK_ERROR, "Cannot remove sub-directories in %s: %s\n", confbase, strerror(errno));
1690 if(unlink(lockfilename)) {
1691 logger(NULL, MESHLINK_ERROR, "Cannot remove lock file %s: %s\n", lockfilename, strerror(errno));
1693 meshlink_errno = MESHLINK_ESTORAGE;
1699 if(!sync_path(confbase)) {
1700 logger(NULL, MESHLINK_ERROR, "Cannot sync directory %s: %s\n", confbase, strerror(errno));
1701 meshlink_errno = MESHLINK_ESTORAGE;
1708 void meshlink_set_receive_cb(meshlink_handle_t *mesh, meshlink_receive_cb_t cb) {
1710 meshlink_errno = MESHLINK_EINVAL;
1714 pthread_mutex_lock(&mesh->mutex);
1715 mesh->receive_cb = cb;
1716 pthread_mutex_unlock(&mesh->mutex);
1719 void meshlink_set_connection_try_cb(meshlink_handle_t *mesh, meshlink_connection_try_cb_t cb) {
1721 meshlink_errno = MESHLINK_EINVAL;
1725 pthread_mutex_lock(&mesh->mutex);
1726 mesh->connection_try_cb = cb;
1727 pthread_mutex_unlock(&mesh->mutex);
1730 void meshlink_set_node_status_cb(meshlink_handle_t *mesh, meshlink_node_status_cb_t cb) {
1732 meshlink_errno = MESHLINK_EINVAL;
1736 pthread_mutex_lock(&mesh->mutex);
1737 mesh->node_status_cb = cb;
1738 pthread_mutex_unlock(&mesh->mutex);
1741 void meshlink_set_node_pmtu_cb(meshlink_handle_t *mesh, meshlink_node_pmtu_cb_t cb) {
1743 meshlink_errno = MESHLINK_EINVAL;
1747 pthread_mutex_lock(&mesh->mutex);
1748 mesh->node_pmtu_cb = cb;
1749 pthread_mutex_unlock(&mesh->mutex);
1752 void meshlink_set_node_duplicate_cb(meshlink_handle_t *mesh, meshlink_node_duplicate_cb_t cb) {
1754 meshlink_errno = MESHLINK_EINVAL;
1758 pthread_mutex_lock(&mesh->mutex);
1759 mesh->node_duplicate_cb = cb;
1760 pthread_mutex_unlock(&mesh->mutex);
1763 void meshlink_set_log_cb(meshlink_handle_t *mesh, meshlink_log_level_t level, meshlink_log_cb_t cb) {
1765 pthread_mutex_lock(&mesh->mutex);
1767 mesh->log_level = cb ? level : 0;
1768 pthread_mutex_unlock(&mesh->mutex);
1771 global_log_level = cb ? level : 0;
1775 void meshlink_set_error_cb(struct meshlink_handle *mesh, meshlink_error_cb_t cb) {
1777 meshlink_errno = MESHLINK_EINVAL;
1781 pthread_mutex_lock(&mesh->mutex);
1782 mesh->error_cb = cb;
1783 pthread_mutex_unlock(&mesh->mutex);
1786 bool meshlink_send(meshlink_handle_t *mesh, meshlink_node_t *destination, const void *data, size_t len) {
1787 meshlink_packethdr_t *hdr;
1789 // Validate arguments
1790 if(!mesh || !destination || len >= MAXSIZE - sizeof(*hdr)) {
1791 meshlink_errno = MESHLINK_EINVAL;
1800 meshlink_errno = MESHLINK_EINVAL;
1804 node_t *n = (node_t *)destination;
1806 if(n->status.blacklisted) {
1807 logger(mesh, MESHLINK_ERROR, "Node %s blacklisted, dropping packet\n", n->name);
1808 meshlink_errno = MESHLINK_EBLACKLISTED;
1812 // Prepare the packet
1813 vpn_packet_t *packet = malloc(sizeof(*packet));
1816 meshlink_errno = MESHLINK_ENOMEM;
1820 packet->probe = false;
1821 packet->tcp = false;
1822 packet->len = len + sizeof(*hdr);
1824 hdr = (meshlink_packethdr_t *)packet->data;
1825 memset(hdr, 0, sizeof(*hdr));
1826 // leave the last byte as 0 to make sure strings are always
1827 // null-terminated if they are longer than the buffer
1828 strncpy((char *)hdr->destination, destination->name, (sizeof(hdr)->destination) - 1);
1829 strncpy((char *)hdr->source, mesh->self->name, (sizeof(hdr)->source) - 1);
1831 memcpy(packet->data + sizeof(*hdr), data, len);
1834 if(!meshlink_queue_push(&mesh->outpacketqueue, packet)) {
1836 meshlink_errno = MESHLINK_ENOMEM;
1840 // Notify event loop
1841 signal_trigger(&mesh->loop, &mesh->datafromapp);
1846 void meshlink_send_from_queue(event_loop_t *loop, void *data) {
1848 meshlink_handle_t *mesh = data;
1849 vpn_packet_t *packet = meshlink_queue_pop(&mesh->outpacketqueue);
1855 mesh->self->in_packets++;
1856 mesh->self->in_bytes += packet->len;
1857 route(mesh, mesh->self, packet);
1862 ssize_t meshlink_get_pmtu(meshlink_handle_t *mesh, meshlink_node_t *destination) {
1863 if(!mesh || !destination) {
1864 meshlink_errno = MESHLINK_EINVAL;
1868 pthread_mutex_lock(&mesh->mutex);
1870 node_t *n = (node_t *)destination;
1872 if(!n->status.reachable) {
1873 pthread_mutex_unlock(&mesh->mutex);
1876 } else if(n->mtuprobes > 30 && n->minmtu) {
1877 pthread_mutex_unlock(&mesh->mutex);
1880 pthread_mutex_unlock(&mesh->mutex);
1885 char *meshlink_get_fingerprint(meshlink_handle_t *mesh, meshlink_node_t *node) {
1886 if(!mesh || !node) {
1887 meshlink_errno = MESHLINK_EINVAL;
1891 pthread_mutex_lock(&mesh->mutex);
1893 node_t *n = (node_t *)node;
1895 if(!node_read_public_key(mesh, n) || !n->ecdsa) {
1896 meshlink_errno = MESHLINK_EINTERNAL;
1897 pthread_mutex_unlock(&mesh->mutex);
1901 char *fingerprint = ecdsa_get_base64_public_key(n->ecdsa);
1904 meshlink_errno = MESHLINK_EINTERNAL;
1907 pthread_mutex_unlock(&mesh->mutex);
1911 meshlink_node_t *meshlink_get_self(meshlink_handle_t *mesh) {
1913 meshlink_errno = MESHLINK_EINVAL;
1917 return (meshlink_node_t *)mesh->self;
1920 meshlink_node_t *meshlink_get_node(meshlink_handle_t *mesh, const char *name) {
1921 if(!mesh || !name) {
1922 meshlink_errno = MESHLINK_EINVAL;
1928 pthread_mutex_lock(&mesh->mutex);
1929 n = lookup_node(mesh, (char *)name); // TODO: make lookup_node() use const
1930 pthread_mutex_unlock(&mesh->mutex);
1933 meshlink_errno = MESHLINK_ENOENT;
1936 return (meshlink_node_t *)n;
1939 meshlink_submesh_t *meshlink_get_submesh(meshlink_handle_t *mesh, const char *name) {
1940 if(!mesh || !name) {
1941 meshlink_errno = MESHLINK_EINVAL;
1945 meshlink_submesh_t *submesh = NULL;
1947 pthread_mutex_lock(&mesh->mutex);
1948 submesh = (meshlink_submesh_t *)lookup_submesh(mesh, name);
1949 pthread_mutex_unlock(&mesh->mutex);
1952 meshlink_errno = MESHLINK_ENOENT;
1958 meshlink_node_t **meshlink_get_all_nodes(meshlink_handle_t *mesh, meshlink_node_t **nodes, size_t *nmemb) {
1959 if(!mesh || !nmemb || (*nmemb && !nodes)) {
1960 meshlink_errno = MESHLINK_EINVAL;
1964 meshlink_node_t **result;
1967 pthread_mutex_lock(&mesh->mutex);
1969 *nmemb = mesh->nodes->count;
1970 result = realloc(nodes, *nmemb * sizeof(*nodes));
1973 meshlink_node_t **p = result;
1975 for splay_each(node_t, n, mesh->nodes) {
1976 *p++ = (meshlink_node_t *)n;
1981 meshlink_errno = MESHLINK_ENOMEM;
1984 pthread_mutex_unlock(&mesh->mutex);
1989 static meshlink_node_t **meshlink_get_all_nodes_by_condition(meshlink_handle_t *mesh, const void *condition, meshlink_node_t **nodes, size_t *nmemb, search_node_by_condition_t search_node) {
1990 meshlink_node_t **result;
1992 pthread_mutex_lock(&mesh->mutex);
1996 for splay_each(node_t, n, mesh->nodes) {
1997 if(search_node(n, condition)) {
2004 pthread_mutex_unlock(&mesh->mutex);
2008 result = realloc(nodes, *nmemb * sizeof(*nodes));
2011 meshlink_node_t **p = result;
2013 for splay_each(node_t, n, mesh->nodes) {
2014 if(search_node(n, condition)) {
2015 *p++ = (meshlink_node_t *)n;
2021 meshlink_errno = MESHLINK_ENOMEM;
2024 pthread_mutex_unlock(&mesh->mutex);
2029 static bool search_node_by_dev_class(const node_t *node, const void *condition) {
2030 dev_class_t *devclass = (dev_class_t *)condition;
2032 if(*devclass == (dev_class_t)node->devclass) {
2039 static bool search_node_by_submesh(const node_t *node, const void *condition) {
2040 if(condition == node->submesh) {
2052 static bool search_node_by_last_reachable(const node_t *node, const void *condition) {
2053 const struct time_range *range = condition;
2054 time_t start = node->last_reachable;
2055 time_t end = node->last_unreachable;
2065 if(range->end >= range->start) {
2066 return start <= range->end && end >= range->start;
2068 return start > range->start || end < range->end;
2072 meshlink_node_t **meshlink_get_all_nodes_by_dev_class(meshlink_handle_t *mesh, dev_class_t devclass, meshlink_node_t **nodes, size_t *nmemb) {
2073 if(!mesh || devclass < 0 || devclass >= DEV_CLASS_COUNT || !nmemb) {
2074 meshlink_errno = MESHLINK_EINVAL;
2078 return meshlink_get_all_nodes_by_condition(mesh, &devclass, nodes, nmemb, search_node_by_dev_class);
2081 meshlink_node_t **meshlink_get_all_nodes_by_submesh(meshlink_handle_t *mesh, meshlink_submesh_t *submesh, meshlink_node_t **nodes, size_t *nmemb) {
2082 if(!mesh || !submesh || !nmemb) {
2083 meshlink_errno = MESHLINK_EINVAL;
2087 return meshlink_get_all_nodes_by_condition(mesh, submesh, nodes, nmemb, search_node_by_submesh);
2090 meshlink_node_t **meshlink_get_all_nodes_by_last_reachable(meshlink_handle_t *mesh, time_t start, time_t end, meshlink_node_t **nodes, size_t *nmemb) {
2091 if(!mesh || !nmemb) {
2092 meshlink_errno = MESHLINK_EINVAL;
2096 struct time_range range = {start, end};
2098 return meshlink_get_all_nodes_by_condition(mesh, &range, nodes, nmemb, search_node_by_last_reachable);
2101 dev_class_t meshlink_get_node_dev_class(meshlink_handle_t *mesh, meshlink_node_t *node) {
2102 if(!mesh || !node) {
2103 meshlink_errno = MESHLINK_EINVAL;
2107 dev_class_t devclass;
2109 pthread_mutex_lock(&mesh->mutex);
2111 devclass = ((node_t *)node)->devclass;
2113 pthread_mutex_unlock(&mesh->mutex);
2118 meshlink_submesh_t *meshlink_get_node_submesh(meshlink_handle_t *mesh, meshlink_node_t *node) {
2119 if(!mesh || !node) {
2120 meshlink_errno = MESHLINK_EINVAL;
2124 node_t *n = (node_t *)node;
2126 meshlink_submesh_t *s;
2128 s = (meshlink_submesh_t *)n->submesh;
2133 bool meshlink_sign(meshlink_handle_t *mesh, const void *data, size_t len, void *signature, size_t *siglen) {
2134 if(!mesh || !data || !len || !signature || !siglen) {
2135 meshlink_errno = MESHLINK_EINVAL;
2139 if(*siglen < MESHLINK_SIGLEN) {
2140 meshlink_errno = MESHLINK_EINVAL;
2144 pthread_mutex_lock(&mesh->mutex);
2146 if(!ecdsa_sign(mesh->private_key, data, len, signature)) {
2147 meshlink_errno = MESHLINK_EINTERNAL;
2148 pthread_mutex_unlock(&mesh->mutex);
2152 *siglen = MESHLINK_SIGLEN;
2153 pthread_mutex_unlock(&mesh->mutex);
2157 bool meshlink_verify(meshlink_handle_t *mesh, meshlink_node_t *source, const void *data, size_t len, const void *signature, size_t siglen) {
2158 if(!mesh || !data || !len || !signature) {
2159 meshlink_errno = MESHLINK_EINVAL;
2163 if(siglen != MESHLINK_SIGLEN) {
2164 meshlink_errno = MESHLINK_EINVAL;
2168 pthread_mutex_lock(&mesh->mutex);
2172 struct node_t *n = (struct node_t *)source;
2174 if(!node_read_public_key(mesh, n)) {
2175 meshlink_errno = MESHLINK_EINTERNAL;
2178 rval = ecdsa_verify(((struct node_t *)source)->ecdsa, data, len, signature);
2181 pthread_mutex_unlock(&mesh->mutex);
2185 static bool refresh_invitation_key(meshlink_handle_t *mesh) {
2186 pthread_mutex_lock(&mesh->mutex);
2188 size_t count = invitation_purge_old(mesh, time(NULL) - mesh->invitation_timeout);
2191 // TODO: Update invitation key if necessary?
2194 pthread_mutex_unlock(&mesh->mutex);
2196 return mesh->invitation_key;
2199 bool meshlink_set_canonical_address(meshlink_handle_t *mesh, meshlink_node_t *node, const char *address, const char *port) {
2200 if(!mesh || !node || !address) {
2201 meshlink_errno = MESHLINK_EINVAL;
2205 if(!is_valid_hostname(address)) {
2206 logger(mesh, MESHLINK_DEBUG, "Invalid character in address: %s\n", address);
2207 meshlink_errno = MESHLINK_EINVAL;
2211 if(port && !is_valid_port(port)) {
2212 logger(mesh, MESHLINK_DEBUG, "Invalid character in port: %s\n", address);
2213 meshlink_errno = MESHLINK_EINVAL;
2217 char *canonical_address;
2220 xasprintf(&canonical_address, "%s %s", address, port);
2222 canonical_address = xstrdup(address);
2225 pthread_mutex_lock(&mesh->mutex);
2227 node_t *n = (node_t *)node;
2228 free(n->canonical_address);
2229 n->canonical_address = canonical_address;
2231 if(!node_write_config(mesh, n)) {
2232 pthread_mutex_unlock(&mesh->mutex);
2236 pthread_mutex_unlock(&mesh->mutex);
2238 return config_sync(mesh, "current");
2241 bool meshlink_add_address(meshlink_handle_t *mesh, const char *address) {
2242 return meshlink_set_canonical_address(mesh, (meshlink_node_t *)mesh->self, address, NULL);
2245 bool meshlink_add_external_address(meshlink_handle_t *mesh) {
2247 meshlink_errno = MESHLINK_EINVAL;
2251 char *address = meshlink_get_external_address(mesh);
2257 bool rval = meshlink_add_address(mesh, address);
2263 int meshlink_get_port(meshlink_handle_t *mesh) {
2265 meshlink_errno = MESHLINK_EINVAL;
2270 meshlink_errno = MESHLINK_EINTERNAL;
2276 pthread_mutex_lock(&mesh->mutex);
2277 port = atoi(mesh->myport);
2278 pthread_mutex_unlock(&mesh->mutex);
2283 bool meshlink_set_port(meshlink_handle_t *mesh, int port) {
2284 if(!mesh || port < 0 || port >= 65536 || mesh->threadstarted) {
2285 meshlink_errno = MESHLINK_EINVAL;
2289 if(mesh->myport && port == atoi(mesh->myport)) {
2293 if(!try_bind(port)) {
2294 meshlink_errno = MESHLINK_ENETWORK;
2298 devtool_trybind_probe();
2302 pthread_mutex_lock(&mesh->mutex);
2304 if(mesh->threadstarted) {
2305 meshlink_errno = MESHLINK_EINVAL;
2310 xasprintf(&mesh->myport, "%d", port);
2312 /* Close down the network. This also deletes mesh->self. */
2313 close_network_connections(mesh);
2315 /* Recreate mesh->self. */
2316 mesh->self = new_node();
2317 mesh->self->name = xstrdup(mesh->name);
2318 mesh->self->devclass = mesh->devclass;
2319 mesh->self->session_id = mesh->session_id;
2320 xasprintf(&mesh->myport, "%d", port);
2322 if(!node_read_public_key(mesh, mesh->self)) {
2323 logger(NULL, MESHLINK_ERROR, "Could not read our host configuration file!");
2324 meshlink_errno = MESHLINK_ESTORAGE;
2325 free_node(mesh->self);
2328 } else if(!setup_network(mesh)) {
2329 meshlink_errno = MESHLINK_ENETWORK;
2333 /* Rebuild our own list of recent addresses */
2334 memset(mesh->self->recent, 0, sizeof(mesh->self->recent));
2335 add_local_addresses(mesh);
2337 /* Write meshlink.conf with the updated port number */
2338 write_main_config_files(mesh);
2340 rval = config_sync(mesh, "current");
2343 pthread_mutex_unlock(&mesh->mutex);
2345 return rval && meshlink_get_port(mesh) == port;
2348 void meshlink_set_invitation_timeout(meshlink_handle_t *mesh, int timeout) {
2349 mesh->invitation_timeout = timeout;
2352 char *meshlink_invite_ex(meshlink_handle_t *mesh, meshlink_submesh_t *submesh, const char *name, uint32_t flags) {
2353 meshlink_submesh_t *s = NULL;
2356 meshlink_errno = MESHLINK_EINVAL;
2361 s = (meshlink_submesh_t *)lookup_submesh(mesh, submesh->name);
2364 logger(mesh, MESHLINK_DEBUG, "Invalid SubMesh Handle.\n");
2365 meshlink_errno = MESHLINK_EINVAL;
2369 s = (meshlink_submesh_t *)mesh->self->submesh;
2372 pthread_mutex_lock(&mesh->mutex);
2374 // Check validity of the new node's name
2375 if(!check_id(name)) {
2376 logger(mesh, MESHLINK_ERROR, "Invalid name for node.\n");
2377 meshlink_errno = MESHLINK_EINVAL;
2378 pthread_mutex_unlock(&mesh->mutex);
2382 // Ensure no host configuration file with that name exists
2383 if(config_exists(mesh, "current", name)) {
2384 logger(mesh, MESHLINK_ERROR, "A host config file for %s already exists!\n", name);
2385 meshlink_errno = MESHLINK_EEXIST;
2386 pthread_mutex_unlock(&mesh->mutex);
2390 // Ensure no other nodes know about this name
2391 if(meshlink_get_node(mesh, name)) {
2392 logger(mesh, MESHLINK_ERROR, "A node with name %s is already known!\n", name);
2393 meshlink_errno = MESHLINK_EEXIST;
2394 pthread_mutex_unlock(&mesh->mutex);
2398 // Get the local address
2399 char *address = get_my_hostname(mesh, flags);
2402 logger(mesh, MESHLINK_ERROR, "No Address known for ourselves!\n");
2403 meshlink_errno = MESHLINK_ERESOLV;
2404 pthread_mutex_unlock(&mesh->mutex);
2408 if(!refresh_invitation_key(mesh)) {
2409 meshlink_errno = MESHLINK_EINTERNAL;
2410 pthread_mutex_unlock(&mesh->mutex);
2414 // If we changed our own host config file, write it out now
2415 if(mesh->self->status.dirty) {
2416 if(!node_write_config(mesh, mesh->self)) {
2417 logger(mesh, MESHLINK_ERROR, "Could not write our own host conifg file!\n");
2418 pthread_mutex_unlock(&mesh->mutex);
2425 // Create a hash of the key.
2426 char *fingerprint = ecdsa_get_base64_public_key(mesh->invitation_key);
2427 sha512(fingerprint, strlen(fingerprint), hash);
2428 b64encode_urlsafe(hash, hash, 18);
2430 // Create a random cookie for this invitation.
2432 randomize(cookie, 18);
2434 // Create a filename that doesn't reveal the cookie itself
2435 char buf[18 + strlen(fingerprint)];
2436 char cookiehash[64];
2437 memcpy(buf, cookie, 18);
2438 memcpy(buf + 18, fingerprint, sizeof(buf) - 18);
2439 sha512(buf, sizeof(buf), cookiehash);
2440 b64encode_urlsafe(cookiehash, cookiehash, 18);
2442 b64encode_urlsafe(cookie, cookie, 18);
2446 /* Construct the invitation file */
2447 uint8_t outbuf[4096];
2448 packmsg_output_t inv = {outbuf, sizeof(outbuf)};
2450 packmsg_add_uint32(&inv, MESHLINK_INVITATION_VERSION);
2451 packmsg_add_str(&inv, name);
2452 packmsg_add_str(&inv, s ? s->name : CORE_MESH);
2453 packmsg_add_int32(&inv, DEV_CLASS_UNKNOWN); /* TODO: allow this to be set by inviter? */
2455 /* TODO: Add several host config files to bootstrap connections.
2456 * Note: make sure we only add config files of nodes that are in the core mesh or the same submesh,
2457 * and are not blacklisted.
2459 config_t configs[5];
2460 memset(configs, 0, sizeof(configs));
2463 if(config_read(mesh, "current", mesh->self->name, &configs[count], mesh->config_key)) {
2467 /* Append host config files to the invitation file */
2468 packmsg_add_array(&inv, count);
2470 for(int i = 0; i < count; i++) {
2471 packmsg_add_bin(&inv, configs[i].buf, configs[i].len);
2472 config_free(&configs[i]);
2475 config_t config = {outbuf, packmsg_output_size(&inv, outbuf)};
2477 if(!invitation_write(mesh, "current", cookiehash, &config, mesh->config_key)) {
2478 logger(mesh, MESHLINK_DEBUG, "Could not create invitation file %s: %s\n", cookiehash, strerror(errno));
2479 meshlink_errno = MESHLINK_ESTORAGE;
2480 pthread_mutex_unlock(&mesh->mutex);
2484 // Create an URL from the local address, key hash and cookie
2486 xasprintf(&url, "%s/%s%s", address, hash, cookie);
2489 pthread_mutex_unlock(&mesh->mutex);
2493 char *meshlink_invite(meshlink_handle_t *mesh, meshlink_submesh_t *submesh, const char *name) {
2494 return meshlink_invite_ex(mesh, submesh, name, 0);
2497 bool meshlink_join(meshlink_handle_t *mesh, const char *invitation) {
2498 if(!mesh || !invitation) {
2499 meshlink_errno = MESHLINK_EINVAL;
2503 pthread_mutex_lock(&mesh->mutex);
2505 //Before doing meshlink_join make sure we are not connected to another mesh
2506 if(mesh->threadstarted) {
2507 logger(mesh, MESHLINK_ERROR, "Cannot join while started\n");
2508 meshlink_errno = MESHLINK_EINVAL;
2509 pthread_mutex_unlock(&mesh->mutex);
2513 // Refuse to join a mesh if we are already part of one. We are part of one if we know at least one other node.
2514 if(mesh->nodes->count > 1) {
2515 logger(mesh, MESHLINK_ERROR, "Already part of an existing mesh\n");
2516 meshlink_errno = MESHLINK_EINVAL;
2517 pthread_mutex_unlock(&mesh->mutex);
2521 //TODO: think of a better name for this variable, or of a different way to tokenize the invitation URL.
2522 char copy[strlen(invitation) + 1];
2523 strcpy(copy, invitation);
2525 // Split the invitation URL into a list of hostname/port tuples, a key hash and a cookie.
2527 char *slash = strchr(copy, '/');
2535 if(strlen(slash) != 48) {
2539 char *address = copy;
2542 if(!b64decode(slash, mesh->hash, 18) || !b64decode(slash + 24, mesh->cookie, 18)) {
2546 // Generate a throw-away key for the invitation.
2547 ecdsa_t *key = ecdsa_generate();
2550 meshlink_errno = MESHLINK_EINTERNAL;
2551 pthread_mutex_unlock(&mesh->mutex);
2555 char *b64key = ecdsa_get_base64_public_key(key);
2559 while(address && *address) {
2560 // We allow commas in the address part to support multiple addresses in one invitation URL.
2561 comma = strchr(address, ',');
2567 // Split of the port
2568 port = strrchr(address, ':');
2576 // IPv6 address are enclosed in brackets, per RFC 3986
2577 if(*address == '[') {
2579 char *bracket = strchr(address, ']');
2592 // Connect to the meshlink daemon mentioned in the URL.
2593 struct addrinfo *ai = str2addrinfo(address, port, SOCK_STREAM);
2596 for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
2597 mesh->sock = socket_in_netns(aip->ai_family, aip->ai_socktype, aip->ai_protocol, mesh->netns);
2599 if(mesh->sock == -1) {
2600 logger(mesh, MESHLINK_DEBUG, "Could not open socket: %s\n", strerror(errno));
2601 meshlink_errno = MESHLINK_ENETWORK;
2605 set_timeout(mesh->sock, 5000);
2607 if(connect(mesh->sock, aip->ai_addr, aip->ai_addrlen)) {
2608 logger(mesh, MESHLINK_DEBUG, "Could not connect to %s port %s: %s\n", address, port, strerror(errno));
2609 meshlink_errno = MESHLINK_ENETWORK;
2610 closesocket(mesh->sock);
2618 meshlink_errno = MESHLINK_ERESOLV;
2621 if(mesh->sock != -1 || !comma) {
2628 if(mesh->sock == -1) {
2629 pthread_mutex_unlock(&mesh->mutex);
2633 logger(mesh, MESHLINK_DEBUG, "Connected to %s port %s...\n", address, port);
2635 // Tell him we have an invitation, and give him our throw-away key.
2639 if(!sendline(mesh->sock, "0 ?%s %d.%d %s", b64key, PROT_MAJOR, PROT_MINOR, mesh->appname)) {
2640 logger(mesh, MESHLINK_DEBUG, "Error sending request to %s port %s: %s\n", address, port, strerror(errno));
2641 closesocket(mesh->sock);
2642 meshlink_errno = MESHLINK_ENETWORK;
2643 pthread_mutex_unlock(&mesh->mutex);
2649 char hisname[4096] = "";
2650 int code, hismajor, hisminor = 0;
2652 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) {
2653 logger(mesh, MESHLINK_DEBUG, "Cannot read greeting from peer\n");
2654 closesocket(mesh->sock);
2655 meshlink_errno = MESHLINK_ENETWORK;
2656 pthread_mutex_unlock(&mesh->mutex);
2660 // Check if the hash of the key he gave us matches the hash in the URL.
2661 char *fingerprint = mesh->line + 2;
2664 if(sha512(fingerprint, strlen(fingerprint), hishash)) {
2665 logger(mesh, MESHLINK_DEBUG, "Could not create hash\n%s\n", mesh->line + 2);
2666 meshlink_errno = MESHLINK_EINTERNAL;
2667 pthread_mutex_unlock(&mesh->mutex);
2671 if(memcmp(hishash, mesh->hash, 18)) {
2672 logger(mesh, MESHLINK_DEBUG, "Peer has an invalid key!\n%s\n", mesh->line + 2);
2673 meshlink_errno = MESHLINK_EPEER;
2674 pthread_mutex_unlock(&mesh->mutex);
2679 ecdsa_t *hiskey = ecdsa_set_base64_public_key(fingerprint);
2682 meshlink_errno = MESHLINK_EINTERNAL;
2683 pthread_mutex_unlock(&mesh->mutex);
2687 // Start an SPTPS session
2688 if(!sptps_start(&mesh->sptps, mesh, true, false, key, hiskey, meshlink_invitation_label, sizeof(meshlink_invitation_label), invitation_send, invitation_receive)) {
2689 meshlink_errno = MESHLINK_EINTERNAL;
2690 pthread_mutex_unlock(&mesh->mutex);
2694 // Feed rest of input buffer to SPTPS
2695 if(!sptps_receive_data(&mesh->sptps, mesh->buffer, mesh->blen)) {
2696 meshlink_errno = MESHLINK_EPEER;
2697 pthread_mutex_unlock(&mesh->mutex);
2703 while((len = recv(mesh->sock, mesh->line, sizeof(mesh)->line, 0))) {
2705 if(errno == EINTR) {
2709 logger(mesh, MESHLINK_DEBUG, "Error reading data from %s port %s: %s\n", address, port, strerror(errno));
2710 meshlink_errno = MESHLINK_ENETWORK;
2711 pthread_mutex_unlock(&mesh->mutex);
2715 if(!sptps_receive_data(&mesh->sptps, mesh->line, len)) {
2716 meshlink_errno = MESHLINK_EPEER;
2717 pthread_mutex_unlock(&mesh->mutex);
2722 sptps_stop(&mesh->sptps);
2725 closesocket(mesh->sock);
2727 if(!mesh->success) {
2728 logger(mesh, MESHLINK_DEBUG, "Connection closed by peer, invitation cancelled.\n");
2729 meshlink_errno = MESHLINK_EPEER;
2730 pthread_mutex_unlock(&mesh->mutex);
2734 pthread_mutex_unlock(&mesh->mutex);
2738 logger(mesh, MESHLINK_DEBUG, "Invalid invitation URL\n");
2739 meshlink_errno = MESHLINK_EINVAL;
2740 pthread_mutex_unlock(&mesh->mutex);
2744 char *meshlink_export(meshlink_handle_t *mesh) {
2746 meshlink_errno = MESHLINK_EINVAL;
2750 // Create a config file on the fly.
2753 packmsg_output_t out = {buf, sizeof(buf)};
2754 packmsg_add_uint32(&out, MESHLINK_CONFIG_VERSION);
2755 packmsg_add_str(&out, mesh->name);
2756 packmsg_add_str(&out, CORE_MESH);
2758 pthread_mutex_lock(&mesh->mutex);
2760 packmsg_add_int32(&out, mesh->self->devclass);
2761 packmsg_add_bool(&out, mesh->self->status.blacklisted);
2762 packmsg_add_bin(&out, ecdsa_get_public_key(mesh->private_key), 32);
2763 packmsg_add_str(&out, mesh->self->canonical_address ? mesh->self->canonical_address : "");
2767 for(uint32_t i = 0; i < MAX_RECENT; i++) {
2768 if(mesh->self->recent[i].sa.sa_family) {
2775 packmsg_add_array(&out, count);
2777 for(uint32_t i = 0; i < count; i++) {
2778 packmsg_add_sockaddr(&out, &mesh->self->recent[i]);
2781 packmsg_add_int64(&out, 0);
2782 packmsg_add_int64(&out, 0);
2784 pthread_mutex_unlock(&mesh->mutex);
2786 if(!packmsg_output_ok(&out)) {
2787 logger(mesh, MESHLINK_DEBUG, "Error creating export data\n");
2788 meshlink_errno = MESHLINK_EINTERNAL;
2792 // Prepare a base64-encoded packmsg array containing our config file
2794 uint32_t len = packmsg_output_size(&out, buf);
2795 uint32_t len2 = ((len + 4) * 4) / 3 + 4;
2796 uint8_t *buf2 = xmalloc(len2);
2797 packmsg_output_t out2 = {buf2, len2};
2798 packmsg_add_array(&out2, 1);
2799 packmsg_add_bin(&out2, buf, packmsg_output_size(&out, buf));
2801 if(!packmsg_output_ok(&out2)) {
2802 logger(mesh, MESHLINK_DEBUG, "Error creating export data\n");
2803 meshlink_errno = MESHLINK_EINTERNAL;
2808 b64encode_urlsafe(buf2, (char *)buf2, packmsg_output_size(&out2, buf2));
2810 return (char *)buf2;
2813 bool meshlink_import(meshlink_handle_t *mesh, const char *data) {
2814 if(!mesh || !data) {
2815 meshlink_errno = MESHLINK_EINVAL;
2819 size_t datalen = strlen(data);
2820 uint8_t *buf = xmalloc(datalen);
2821 int buflen = b64decode(data, buf, datalen);
2824 logger(mesh, MESHLINK_DEBUG, "Invalid data\n");
2825 meshlink_errno = MESHLINK_EPEER;
2829 packmsg_input_t in = {buf, buflen};
2830 uint32_t count = packmsg_get_array(&in);
2833 logger(mesh, MESHLINK_DEBUG, "Invalid data\n");
2834 meshlink_errno = MESHLINK_EPEER;
2838 pthread_mutex_lock(&mesh->mutex);
2842 uint32_t len = packmsg_get_bin_raw(&in, &data);
2848 packmsg_input_t in2 = {data, len};
2849 uint32_t version = packmsg_get_uint32(&in2);
2850 char *name = packmsg_get_str_dup(&in2);
2852 if(!packmsg_input_ok(&in2) || version != MESHLINK_CONFIG_VERSION || !check_id(name)) {
2854 packmsg_input_invalidate(&in);
2858 if(!check_id(name)) {
2863 node_t *n = lookup_node(mesh, name);
2866 logger(mesh, MESHLINK_DEBUG, "Node %s already exists, not importing\n", name);
2874 config_t config = {data, len};
2876 if(!node_read_from_config(mesh, n, &config)) {
2878 packmsg_input_invalidate(&in);
2882 if(!config_write(mesh, "current", n->name, &config, mesh->config_key)) {
2890 pthread_mutex_unlock(&mesh->mutex);
2894 if(!packmsg_done(&in)) {
2895 logger(mesh, MESHLINK_ERROR, "Invalid data\n");
2896 meshlink_errno = MESHLINK_EPEER;
2900 if(!config_sync(mesh, "current")) {
2907 static bool blacklist(meshlink_handle_t *mesh, node_t *n) {
2908 if(n == mesh->self) {
2909 logger(mesh, MESHLINK_ERROR, "%s blacklisting itself?\n", n->name);
2910 meshlink_errno = MESHLINK_EINVAL;
2914 if(n->status.blacklisted) {
2915 logger(mesh, MESHLINK_DEBUG, "Node %s already blacklisted\n", n->name);
2919 n->status.blacklisted = true;
2921 /* Immediately shut down any connections we have with the blacklisted node.
2922 * We can't call terminate_connection(), because we might be called from a callback function.
2924 for list_each(connection_t, c, mesh->connections) {
2926 shutdown(c->socket, SHUT_RDWR);
2930 utcp_abort_all_connections(n->utcp);
2936 n->status.udp_confirmed = false;
2938 /* Graph updates will suppress status updates for blacklisted nodes, so we need to
2939 * manually call the status callback if necessary.
2941 if(n->status.reachable && mesh->node_status_cb) {
2942 mesh->node_status_cb(mesh, (meshlink_node_t *)n, false);
2945 return node_write_config(mesh, n) && config_sync(mesh, "current");
2948 bool meshlink_blacklist(meshlink_handle_t *mesh, meshlink_node_t *node) {
2949 if(!mesh || !node) {
2950 meshlink_errno = MESHLINK_EINVAL;
2954 pthread_mutex_lock(&mesh->mutex);
2956 if(!blacklist(mesh, (node_t *)node)) {
2957 pthread_mutex_unlock(&mesh->mutex);
2961 pthread_mutex_unlock(&mesh->mutex);
2963 logger(mesh, MESHLINK_DEBUG, "Blacklisted %s.\n", node->name);
2967 bool meshlink_blacklist_by_name(meshlink_handle_t *mesh, const char *name) {
2968 if(!mesh || !name) {
2969 meshlink_errno = MESHLINK_EINVAL;
2973 pthread_mutex_lock(&mesh->mutex);
2975 node_t *n = lookup_node(mesh, (char *)name);
2979 n->name = xstrdup(name);
2983 if(!blacklist(mesh, (node_t *)n)) {
2984 pthread_mutex_unlock(&mesh->mutex);
2988 pthread_mutex_unlock(&mesh->mutex);
2990 logger(mesh, MESHLINK_DEBUG, "Blacklisted %s.\n", name);
2994 static bool whitelist(meshlink_handle_t *mesh, node_t *n) {
2995 if(n == mesh->self) {
2996 logger(mesh, MESHLINK_ERROR, "%s whitelisting itself?\n", n->name);
2997 meshlink_errno = MESHLINK_EINVAL;
3001 if(!n->status.blacklisted) {
3002 logger(mesh, MESHLINK_DEBUG, "Node %s was already whitelisted\n", n->name);
3006 n->status.blacklisted = false;
3008 if(n->status.reachable) {
3009 update_node_status(mesh, n);
3012 return node_write_config(mesh, n) && config_sync(mesh, "current");
3015 bool meshlink_whitelist(meshlink_handle_t *mesh, meshlink_node_t *node) {
3016 if(!mesh || !node) {
3017 meshlink_errno = MESHLINK_EINVAL;
3021 pthread_mutex_lock(&mesh->mutex);
3023 if(!whitelist(mesh, (node_t *)node)) {
3024 pthread_mutex_unlock(&mesh->mutex);
3028 pthread_mutex_unlock(&mesh->mutex);
3030 logger(mesh, MESHLINK_DEBUG, "Whitelisted %s.\n", node->name);
3034 bool meshlink_whitelist_by_name(meshlink_handle_t *mesh, const char *name) {
3035 if(!mesh || !name) {
3036 meshlink_errno = MESHLINK_EINVAL;
3040 pthread_mutex_lock(&mesh->mutex);
3042 node_t *n = lookup_node(mesh, (char *)name);
3046 n->name = xstrdup(name);
3050 if(!whitelist(mesh, (node_t *)n)) {
3051 pthread_mutex_unlock(&mesh->mutex);
3055 pthread_mutex_unlock(&mesh->mutex);
3057 logger(mesh, MESHLINK_DEBUG, "Whitelisted %s.\n", name);
3061 void meshlink_set_default_blacklist(meshlink_handle_t *mesh, bool blacklist) {
3062 mesh->default_blacklist = blacklist;
3065 bool meshlink_forget_node(meshlink_handle_t *mesh, meshlink_node_t *node) {
3066 if(!mesh || !node) {
3067 meshlink_errno = MESHLINK_EINVAL;
3071 node_t *n = (node_t *)node;
3073 pthread_mutex_lock(&mesh->mutex);
3075 /* Check that the node is not reachable */
3076 if(n->status.reachable || n->connection) {
3077 pthread_mutex_unlock(&mesh->mutex);
3078 logger(mesh, MESHLINK_WARNING, "Could not forget %s: still reachable", n->name);
3082 /* Check that we don't have any active UTCP connections */
3083 if(n->utcp && utcp_is_active(n->utcp)) {
3084 pthread_mutex_unlock(&mesh->mutex);
3085 logger(mesh, MESHLINK_WARNING, "Could not forget %s: active UTCP connections", n->name);
3089 /* Check that we have no active connections to this node */
3090 for list_each(connection_t, c, mesh->connections) {
3092 pthread_mutex_unlock(&mesh->mutex);
3093 logger(mesh, MESHLINK_WARNING, "Could not forget %s: active connection", n->name);
3098 /* Remove any pending outgoings to this node */
3099 if(mesh->outgoings) {
3100 for list_each(outgoing_t, outgoing, mesh->outgoings) {
3101 if(outgoing->node == n) {
3102 list_delete_node(mesh->outgoings, node);
3107 /* Delete the config file for this node */
3108 if(!config_delete(mesh, "current", n->name)) {
3109 pthread_mutex_unlock(&mesh->mutex);
3113 /* Delete the node struct and any remaining edges referencing this node */
3116 pthread_mutex_unlock(&mesh->mutex);
3118 return config_sync(mesh, "current");
3121 /* Hint that a hostname may be found at an address
3122 * See header file for detailed comment.
3124 void meshlink_hint_address(meshlink_handle_t *mesh, meshlink_node_t *node, const struct sockaddr *addr) {
3125 if(!mesh || !node || !addr) {
3126 meshlink_errno = EINVAL;
3130 pthread_mutex_lock(&mesh->mutex);
3132 node_t *n = (node_t *)node;
3134 if(node_add_recent_address(mesh, n, (sockaddr_t *)addr)) {
3135 if(!node_write_config(mesh, n)) {
3136 logger(mesh, MESHLINK_DEBUG, "Could not update %s\n", n->name);
3140 pthread_mutex_unlock(&mesh->mutex);
3141 // @TODO do we want to fire off a connection attempt right away?
3144 static bool channel_pre_accept(struct utcp *utcp, uint16_t port) {
3146 node_t *n = utcp->priv;
3147 meshlink_handle_t *mesh = n->mesh;
3148 return mesh->channel_accept_cb;
3151 static void aio_signal(meshlink_handle_t *mesh, meshlink_channel_t *channel, meshlink_aio_buffer_t *aio) {
3153 if(aio->cb.buffer) {
3154 aio->cb.buffer(mesh, channel, aio->data, aio->len, aio->priv);
3158 aio->cb.fd(mesh, channel, aio->fd, aio->done, aio->priv);
3163 static ssize_t channel_recv(struct utcp_connection *connection, const void *data, size_t len) {
3164 meshlink_channel_t *channel = connection->priv;
3170 node_t *n = channel->node;
3171 meshlink_handle_t *mesh = n->mesh;
3173 if(n->status.destroyed) {
3174 meshlink_channel_close(mesh, channel);
3178 const char *p = data;
3181 while(channel->aio_receive) {
3182 meshlink_aio_buffer_t *aio = channel->aio_receive;
3183 size_t todo = aio->len - aio->done;
3190 memcpy((char *)aio->data + aio->done, p, todo);
3192 ssize_t result = write(aio->fd, p, todo);
3201 if(aio->done == aio->len) {
3202 channel->aio_receive = aio->next;
3203 aio_signal(mesh, channel, aio);
3215 if(channel->receive_cb) {
3216 channel->receive_cb(mesh, channel, p, left);
3222 static void channel_accept(struct utcp_connection *utcp_connection, uint16_t port) {
3223 node_t *n = utcp_connection->utcp->priv;
3229 meshlink_handle_t *mesh = n->mesh;
3231 if(!mesh->channel_accept_cb) {
3235 meshlink_channel_t *channel = xzalloc(sizeof(*channel));
3237 channel->c = utcp_connection;
3239 if(mesh->channel_accept_cb(mesh, channel, port, NULL, 0)) {
3240 utcp_accept(utcp_connection, channel_recv, channel);
3246 static ssize_t channel_send(struct utcp *utcp, const void *data, size_t len) {
3247 node_t *n = utcp->priv;
3249 if(n->status.destroyed) {
3253 meshlink_handle_t *mesh = n->mesh;
3254 return meshlink_send(mesh, (meshlink_node_t *)n, data, len) ? (ssize_t)len : -1;
3257 void meshlink_set_channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, meshlink_channel_receive_cb_t cb) {
3258 if(!mesh || !channel) {
3259 meshlink_errno = MESHLINK_EINVAL;
3263 channel->receive_cb = cb;
3266 static void channel_receive(meshlink_handle_t *mesh, meshlink_node_t *source, const void *data, size_t len) {
3268 node_t *n = (node_t *)source;
3274 utcp_recv(n->utcp, data, len);
3277 static void channel_poll(struct utcp_connection *connection, size_t len) {
3278 meshlink_channel_t *channel = connection->priv;
3284 node_t *n = channel->node;
3285 meshlink_handle_t *mesh = n->mesh;
3286 meshlink_aio_buffer_t *aio = channel->aio_send;
3289 /* We at least one AIO buffer. Send as much as possible form the first buffer. */
3290 size_t left = aio->len - aio->done;
3298 sent = utcp_send(connection, (char *)aio->data + aio->done, len);
3301 size_t todo = utcp_get_sndbuf_free(connection);
3307 if(todo > sizeof(buf)) {
3311 ssize_t result = read(aio->fd, buf, todo);
3314 sent = utcp_send(connection, buf, result);
3324 /* If the buffer is now completely sent, call the callback and dispose of it. */
3325 if(aio->done >= aio->len) {
3326 channel->aio_send = aio->next;
3327 aio_signal(mesh, channel, aio);
3331 if(channel->poll_cb) {
3332 channel->poll_cb(mesh, channel, len);
3334 utcp_set_poll_cb(connection, NULL);
3339 void meshlink_set_channel_poll_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, meshlink_channel_poll_cb_t cb) {
3340 if(!mesh || !channel) {
3341 meshlink_errno = MESHLINK_EINVAL;
3345 pthread_mutex_lock(&mesh->mutex);
3346 channel->poll_cb = cb;
3347 utcp_set_poll_cb(channel->c, (cb || channel->aio_send) ? channel_poll : NULL);
3348 pthread_mutex_unlock(&mesh->mutex);
3351 void meshlink_set_channel_accept_cb(meshlink_handle_t *mesh, meshlink_channel_accept_cb_t cb) {
3353 meshlink_errno = MESHLINK_EINVAL;
3357 pthread_mutex_lock(&mesh->mutex);
3358 mesh->channel_accept_cb = cb;
3359 mesh->receive_cb = channel_receive;
3361 for splay_each(node_t, n, mesh->nodes) {
3362 if(!n->utcp && n != mesh->self) {
3363 n->utcp = utcp_init(channel_accept, channel_pre_accept, channel_send, n);
3367 pthread_mutex_unlock(&mesh->mutex);
3370 void meshlink_set_channel_sndbuf(meshlink_handle_t *mesh, meshlink_channel_t *channel, size_t size) {
3374 meshlink_errno = MESHLINK_EINVAL;
3378 pthread_mutex_lock(&mesh->mutex);
3379 utcp_set_sndbuf(channel->c, size);
3380 pthread_mutex_unlock(&mesh->mutex);
3383 void meshlink_set_channel_rcvbuf(meshlink_handle_t *mesh, meshlink_channel_t *channel, size_t size) {
3387 meshlink_errno = MESHLINK_EINVAL;
3391 pthread_mutex_lock(&mesh->mutex);
3392 utcp_set_rcvbuf(channel->c, size);
3393 pthread_mutex_unlock(&mesh->mutex);
3396 meshlink_channel_t *meshlink_channel_open_ex(meshlink_handle_t *mesh, meshlink_node_t *node, uint16_t port, meshlink_channel_receive_cb_t cb, const void *data, size_t len, uint32_t flags) {
3398 abort(); // TODO: handle non-NULL data
3401 if(!mesh || !node) {
3402 meshlink_errno = MESHLINK_EINVAL;
3406 pthread_mutex_lock(&mesh->mutex);
3408 node_t *n = (node_t *)node;
3411 n->utcp = utcp_init(channel_accept, channel_pre_accept, channel_send, n);
3412 mesh->receive_cb = channel_receive;
3415 meshlink_errno = errno == ENOMEM ? MESHLINK_ENOMEM : MESHLINK_EINTERNAL;
3416 pthread_mutex_unlock(&mesh->mutex);
3421 if(n->status.blacklisted) {
3422 logger(mesh, MESHLINK_ERROR, "Cannot open a channel with blacklisted node\n");
3423 meshlink_errno = MESHLINK_EBLACKLISTED;
3424 pthread_mutex_unlock(&mesh->mutex);
3428 meshlink_channel_t *channel = xzalloc(sizeof(*channel));
3430 channel->receive_cb = cb;
3433 channel->priv = (void *)data;
3436 channel->c = utcp_connect_ex(n->utcp, port, channel_recv, channel, flags);
3438 pthread_mutex_unlock(&mesh->mutex);
3441 meshlink_errno = errno == ENOMEM ? MESHLINK_ENOMEM : MESHLINK_EINTERNAL;
3449 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) {
3450 return meshlink_channel_open_ex(mesh, node, port, cb, data, len, MESHLINK_CHANNEL_TCP);
3453 void meshlink_channel_shutdown(meshlink_handle_t *mesh, meshlink_channel_t *channel, int direction) {
3454 if(!mesh || !channel) {
3455 meshlink_errno = MESHLINK_EINVAL;
3459 pthread_mutex_lock(&mesh->mutex);
3460 utcp_shutdown(channel->c, direction);
3461 pthread_mutex_unlock(&mesh->mutex);
3464 void meshlink_channel_close(meshlink_handle_t *mesh, meshlink_channel_t *channel) {
3465 if(!mesh || !channel) {
3466 meshlink_errno = MESHLINK_EINVAL;
3470 pthread_mutex_lock(&mesh->mutex);
3472 utcp_close(channel->c);
3474 /* Clean up any outstanding AIO buffers. */
3475 for(meshlink_aio_buffer_t *aio = channel->aio_send, *next; aio; aio = next) {
3477 aio_signal(mesh, channel, aio);
3481 for(meshlink_aio_buffer_t *aio = channel->aio_receive, *next; aio; aio = next) {
3483 aio_signal(mesh, channel, aio);
3487 pthread_mutex_unlock(&mesh->mutex);
3492 ssize_t meshlink_channel_send(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len) {
3493 if(!mesh || !channel) {
3494 meshlink_errno = MESHLINK_EINVAL;
3503 meshlink_errno = MESHLINK_EINVAL;
3507 // TODO: more finegrained locking.
3508 // Ideally we want to put the data into the UTCP connection's send buffer.
3509 // Then, preferably only if there is room in the receiver window,
3510 // kick the meshlink thread to go send packets.
3514 pthread_mutex_lock(&mesh->mutex);
3516 /* Disallow direct calls to utcp_send() while we still have AIO active. */
3517 if(channel->aio_send) {
3520 retval = utcp_send(channel->c, data, len);
3523 pthread_mutex_unlock(&mesh->mutex);
3526 meshlink_errno = MESHLINK_ENETWORK;
3532 bool meshlink_channel_aio_send(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len, meshlink_aio_cb_t cb, void *priv) {
3533 if(!mesh || !channel) {
3534 meshlink_errno = MESHLINK_EINVAL;
3539 meshlink_errno = MESHLINK_EINVAL;
3543 meshlink_aio_buffer_t *aio = xzalloc(sizeof(*aio));
3546 aio->cb.buffer = cb;
3549 pthread_mutex_lock(&mesh->mutex);
3551 /* Append the AIO buffer descriptor to the end of the chain */
3552 meshlink_aio_buffer_t **p = &channel->aio_send;
3560 /* Ensure the poll callback is set, and call it right now to push data if possible */
3561 utcp_set_poll_cb(channel->c, channel_poll);
3562 channel_poll(channel->c, len);
3564 pthread_mutex_unlock(&mesh->mutex);
3569 bool meshlink_channel_aio_fd_send(meshlink_handle_t *mesh, meshlink_channel_t *channel, int fd, size_t len, meshlink_aio_fd_cb_t cb, void *priv) {
3570 if(!mesh || !channel) {
3571 meshlink_errno = MESHLINK_EINVAL;
3575 if(!len || fd == -1) {
3576 meshlink_errno = MESHLINK_EINVAL;
3580 meshlink_aio_buffer_t *aio = xzalloc(sizeof(*aio));
3586 pthread_mutex_lock(&mesh->mutex);
3588 /* Append the AIO buffer descriptor to the end of the chain */
3589 meshlink_aio_buffer_t **p = &channel->aio_send;
3597 /* Ensure the poll callback is set, and call it right now to push data if possible */
3598 utcp_set_poll_cb(channel->c, channel_poll);
3599 channel_poll(channel->c, len);
3601 pthread_mutex_unlock(&mesh->mutex);
3606 bool meshlink_channel_aio_receive(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len, meshlink_aio_cb_t cb, void *priv) {
3607 if(!mesh || !channel) {
3608 meshlink_errno = MESHLINK_EINVAL;
3613 meshlink_errno = MESHLINK_EINVAL;
3617 meshlink_aio_buffer_t *aio = xzalloc(sizeof(*aio));
3620 aio->cb.buffer = cb;
3623 pthread_mutex_lock(&mesh->mutex);
3625 /* Append the AIO buffer descriptor to the end of the chain */
3626 meshlink_aio_buffer_t **p = &channel->aio_receive;
3634 pthread_mutex_unlock(&mesh->mutex);
3639 bool meshlink_channel_aio_fd_receive(meshlink_handle_t *mesh, meshlink_channel_t *channel, int fd, size_t len, meshlink_aio_fd_cb_t cb, void *priv) {
3640 if(!mesh || !channel) {
3641 meshlink_errno = MESHLINK_EINVAL;
3645 if(!len || fd == -1) {
3646 meshlink_errno = MESHLINK_EINVAL;
3650 meshlink_aio_buffer_t *aio = xzalloc(sizeof(*aio));
3656 pthread_mutex_lock(&mesh->mutex);
3658 /* Append the AIO buffer descriptor to the end of the chain */
3659 meshlink_aio_buffer_t **p = &channel->aio_receive;
3667 pthread_mutex_unlock(&mesh->mutex);
3672 uint32_t meshlink_channel_get_flags(meshlink_handle_t *mesh, meshlink_channel_t *channel) {
3673 if(!mesh || !channel) {
3674 meshlink_errno = MESHLINK_EINVAL;
3678 return channel->c->flags;
3681 size_t meshlink_channel_get_sendq(meshlink_handle_t *mesh, meshlink_channel_t *channel) {
3682 if(!mesh || !channel) {
3683 meshlink_errno = MESHLINK_EINVAL;
3687 return utcp_get_sendq(channel->c);
3690 size_t meshlink_channel_get_recvq(meshlink_handle_t *mesh, meshlink_channel_t *channel) {
3691 if(!mesh || !channel) {
3692 meshlink_errno = MESHLINK_EINVAL;
3696 return utcp_get_recvq(channel->c);
3699 void meshlink_set_node_channel_timeout(meshlink_handle_t *mesh, meshlink_node_t *node, int timeout) {
3700 if(!mesh || !node) {
3701 meshlink_errno = MESHLINK_EINVAL;
3705 node_t *n = (node_t *)node;
3707 pthread_mutex_lock(&mesh->mutex);
3710 n->utcp = utcp_init(channel_accept, channel_pre_accept, channel_send, n);
3713 utcp_set_user_timeout(n->utcp, timeout);
3715 pthread_mutex_unlock(&mesh->mutex);
3718 void update_node_status(meshlink_handle_t *mesh, node_t *n) {
3719 if(n->status.reachable && mesh->channel_accept_cb && !n->utcp) {
3720 n->utcp = utcp_init(channel_accept, channel_pre_accept, channel_send, n);
3723 if(mesh->node_status_cb) {
3724 mesh->node_status_cb(mesh, (meshlink_node_t *)n, n->status.reachable && !n->status.blacklisted);
3727 if(mesh->node_pmtu_cb) {
3728 mesh->node_pmtu_cb(mesh, (meshlink_node_t *)n, n->minmtu);
3732 void update_node_pmtu(meshlink_handle_t *mesh, node_t *n) {
3733 if(mesh->node_pmtu_cb && !n->status.blacklisted) {
3734 mesh->node_pmtu_cb(mesh, (meshlink_node_t *)n, n->minmtu);
3738 void handle_duplicate_node(meshlink_handle_t *mesh, node_t *n) {
3739 if(!mesh->node_duplicate_cb || n->status.duplicate) {
3743 n->status.duplicate = true;
3744 mesh->node_duplicate_cb(mesh, (meshlink_node_t *)n);
3747 void meshlink_enable_discovery(meshlink_handle_t *mesh, bool enable) {
3751 meshlink_errno = MESHLINK_EINVAL;
3755 pthread_mutex_lock(&mesh->mutex);
3757 if(mesh->discovery == enable) {
3761 if(mesh->threadstarted) {
3763 discovery_start(mesh);
3765 discovery_stop(mesh);
3769 mesh->discovery = enable;
3772 pthread_mutex_unlock(&mesh->mutex);
3776 meshlink_errno = MESHLINK_ENOTSUP;
3780 void meshlink_set_dev_class_timeouts(meshlink_handle_t *mesh, dev_class_t devclass, int pinginterval, int pingtimeout) {
3781 if(!mesh || devclass < 0 || devclass >= DEV_CLASS_COUNT) {
3782 meshlink_errno = EINVAL;
3786 if(pinginterval < 1 || pingtimeout < 1 || pingtimeout > pinginterval) {
3787 meshlink_errno = EINVAL;
3791 pthread_mutex_lock(&mesh->mutex);
3792 mesh->dev_class_traits[devclass].pinginterval = pinginterval;
3793 mesh->dev_class_traits[devclass].pingtimeout = pingtimeout;
3794 pthread_mutex_unlock(&mesh->mutex);
3797 void handle_network_change(meshlink_handle_t *mesh, bool online) {
3800 if(!mesh->connections || !mesh->loop.running) {
3807 void call_error_cb(meshlink_handle_t *mesh, meshlink_errno_t meshlink_errno) {
3808 // We should only call the callback function if we are in the background thread.
3809 if(!mesh->error_cb) {
3813 if(!mesh->threadstarted) {
3817 if(mesh->thread == pthread_self()) {
3818 mesh->error_cb(mesh, meshlink_errno);
3823 static void __attribute__((constructor)) meshlink_init(void) {
3827 static void __attribute__((destructor)) meshlink_exit(void) {