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
615 for(uint32_t i = 0; i < count; i++) {
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;
659 /* The first host config file is of the inviter itself;
660 * remember the address we are currently using for the invitation connection.
663 socklen_t salen = sizeof(sa);
665 if(getpeername(mesh->sock, &sa.sa, &salen) == 0) {
666 node_add_recent_address(mesh, n, &sa);
670 if(!node_write_config(mesh, n)) {
678 /* Ensure the configuration directory metadata is on disk */
679 if(!config_sync(mesh, "current") || !sync_path(mesh->confbase)) {
683 sptps_send_record(&mesh->sptps, 1, ecdsa_get_public_key(mesh->private_key), 32);
685 logger(mesh, MESHLINK_DEBUG, "Configuration stored in: %s\n", mesh->confbase);
690 static bool invitation_send(void *handle, uint8_t type, const void *data, size_t len) {
692 meshlink_handle_t *mesh = handle;
693 const char *ptr = data;
696 int result = send(mesh->sock, ptr, len, 0);
698 if(result == -1 && errno == EINTR) {
700 } else if(result <= 0) {
711 static bool invitation_receive(void *handle, uint8_t type, const void *msg, uint16_t len) {
712 meshlink_handle_t *mesh = handle;
715 case SPTPS_HANDSHAKE:
716 return sptps_send_record(&mesh->sptps, 0, mesh->cookie, sizeof(mesh)->cookie);
719 return finalize_join(mesh, msg, len);
722 logger(mesh, MESHLINK_DEBUG, "Invitation succesfully accepted.\n");
723 shutdown(mesh->sock, SHUT_RDWR);
724 mesh->success = true;
734 static bool recvline(meshlink_handle_t *mesh, size_t len) {
735 char *newline = NULL;
741 while(!(newline = memchr(mesh->buffer, '\n', mesh->blen))) {
742 int result = recv(mesh->sock, mesh->buffer + mesh->blen, sizeof(mesh)->buffer - mesh->blen, 0);
744 if(result == -1 && errno == EINTR) {
746 } else if(result <= 0) {
750 mesh->blen += result;
753 if((size_t)(newline - mesh->buffer) >= len) {
757 len = newline - mesh->buffer;
759 memcpy(mesh->line, mesh->buffer, len);
761 memmove(mesh->buffer, newline + 1, mesh->blen - len - 1);
762 mesh->blen -= len + 1;
767 static bool sendline(int fd, char *format, ...) {
773 va_start(ap, format);
774 blen = vsnprintf(buffer, sizeof(buffer), format, ap);
777 if(blen < 1 || (size_t)blen >= sizeof(buffer)) {
785 int result = send(fd, p, blen, MSG_NOSIGNAL);
787 if(result == -1 && errno == EINTR) {
789 } else if(result <= 0) {
800 static const char *errstr[] = {
801 [MESHLINK_OK] = "No error",
802 [MESHLINK_EINVAL] = "Invalid argument",
803 [MESHLINK_ENOMEM] = "Out of memory",
804 [MESHLINK_ENOENT] = "No such node",
805 [MESHLINK_EEXIST] = "Node already exists",
806 [MESHLINK_EINTERNAL] = "Internal error",
807 [MESHLINK_ERESOLV] = "Could not resolve hostname",
808 [MESHLINK_ESTORAGE] = "Storage error",
809 [MESHLINK_ENETWORK] = "Network error",
810 [MESHLINK_EPEER] = "Error communicating with peer",
811 [MESHLINK_ENOTSUP] = "Operation not supported",
812 [MESHLINK_EBUSY] = "MeshLink instance already in use",
813 [MESHLINK_EBLACKLISTED] = "Node is blacklisted",
816 const char *meshlink_strerror(meshlink_errno_t err) {
817 if((int)err < 0 || err >= sizeof(errstr) / sizeof(*errstr)) {
818 return "Invalid error code";
824 static bool ecdsa_keygen(meshlink_handle_t *mesh) {
825 logger(mesh, MESHLINK_DEBUG, "Generating ECDSA keypairs:\n");
827 mesh->private_key = ecdsa_generate();
828 mesh->invitation_key = ecdsa_generate();
830 if(!mesh->private_key || !mesh->invitation_key) {
831 logger(mesh, MESHLINK_DEBUG, "Error during key generation!\n");
832 meshlink_errno = MESHLINK_EINTERNAL;
836 logger(mesh, MESHLINK_DEBUG, "Done.\n");
841 static struct timeval idle(event_loop_t *loop, void *data) {
843 meshlink_handle_t *mesh = data;
844 struct timeval t, tmin = {3600, 0};
846 for splay_each(node_t, n, mesh->nodes) {
851 t = utcp_timeout(n->utcp);
853 if(timercmp(&t, &tmin, <)) {
861 // Get our local address(es) by simulating connecting to an Internet host.
862 static void add_local_addresses(meshlink_handle_t *mesh) {
864 sa.storage.ss_family = AF_UNKNOWN;
865 socklen_t salen = sizeof(sa);
869 if(getlocaladdr("93.184.216.34", &sa, &salen, mesh->netns)) {
870 sa.in.sin_port = ntohs(atoi(mesh->myport));
871 node_add_recent_address(mesh, mesh->self, &sa);
878 if(getlocaladdr("2606:2800:220:1:248:1893:25c8:1946", &sa, &salen, mesh->netns)) {
879 sa.in6.sin6_port = ntohs(atoi(mesh->myport));
880 node_add_recent_address(mesh, mesh->self, &sa);
884 static bool meshlink_setup(meshlink_handle_t *mesh) {
885 if(!config_destroy(mesh->confbase, "new")) {
886 logger(mesh, MESHLINK_ERROR, "Could not delete configuration in %s/new: %s\n", mesh->confbase, strerror(errno));
887 meshlink_errno = MESHLINK_ESTORAGE;
891 if(!config_destroy(mesh->confbase, "old")) {
892 logger(mesh, MESHLINK_ERROR, "Could not delete configuration in %s/old: %s\n", mesh->confbase, strerror(errno));
893 meshlink_errno = MESHLINK_ESTORAGE;
897 if(!config_init(mesh, "current")) {
898 logger(mesh, MESHLINK_ERROR, "Could not set up configuration in %s/current: %s\n", mesh->confbase, strerror(errno));
899 meshlink_errno = MESHLINK_ESTORAGE;
903 if(!ecdsa_keygen(mesh)) {
904 meshlink_errno = MESHLINK_EINTERNAL;
908 if(check_port(mesh) == 0) {
909 meshlink_errno = MESHLINK_ENETWORK;
913 /* Create a node for ourself */
915 mesh->self = new_node();
916 mesh->self->name = xstrdup(mesh->name);
917 mesh->self->devclass = mesh->devclass;
918 mesh->self->ecdsa = ecdsa_set_public_key(ecdsa_get_public_key(mesh->private_key));
919 mesh->self->session_id = mesh->session_id;
921 if(!write_main_config_files(mesh)) {
922 logger(mesh, MESHLINK_ERROR, "Could not write main config files into %s/current: %s\n", mesh->confbase, strerror(errno));
923 meshlink_errno = MESHLINK_ESTORAGE;
927 /* Ensure the configuration directory metadata is on disk */
928 if(!config_sync(mesh, "current")) {
935 static bool meshlink_read_config(meshlink_handle_t *mesh) {
938 if(!main_config_read(mesh, "current", &config, mesh->config_key)) {
939 logger(NULL, MESHLINK_ERROR, "Could not read main configuration file!");
943 packmsg_input_t in = {config.buf, config.len};
944 const void *private_key;
945 const void *invitation_key;
947 uint32_t version = packmsg_get_uint32(&in);
948 char *name = packmsg_get_str_dup(&in);
949 uint32_t private_key_len = packmsg_get_bin_raw(&in, &private_key);
950 uint32_t invitation_key_len = packmsg_get_bin_raw(&in, &invitation_key);
951 uint16_t myport = packmsg_get_uint16(&in);
953 if(!packmsg_done(&in) || version != MESHLINK_CONFIG_VERSION || private_key_len != 96 || invitation_key_len != 96) {
954 logger(NULL, MESHLINK_ERROR, "Error parsing main configuration file!");
956 config_free(&config);
963 if(mesh->name && strcmp(mesh->name, name)) {
964 logger(NULL, MESHLINK_ERROR, "Configuration is for a different name (%s)!", name);
965 meshlink_errno = MESHLINK_ESTORAGE;
967 config_free(&config);
975 xasprintf(&mesh->myport, "%u", myport);
976 mesh->private_key = ecdsa_set_private_key(private_key);
977 mesh->invitation_key = ecdsa_set_private_key(invitation_key);
978 config_free(&config);
980 /* Create a node for ourself and read our host configuration file */
982 mesh->self = new_node();
983 mesh->self->name = xstrdup(name);
984 mesh->self->devclass = mesh->devclass;
985 mesh->self->session_id = mesh->session_id;
987 if(!node_read_public_key(mesh, mesh->self)) {
988 logger(NULL, MESHLINK_ERROR, "Could not read our host configuration file!");
989 meshlink_errno = MESHLINK_ESTORAGE;
990 free_node(mesh->self);
999 static void *setup_network_in_netns_thread(void *arg) {
1000 meshlink_handle_t *mesh = arg;
1002 if(setns(mesh->netns, CLONE_NEWNET) != 0) {
1006 bool success = setup_network(mesh);
1007 add_local_addresses(mesh);
1008 return success ? arg : NULL;
1010 #endif // HAVE_SETNS
1012 meshlink_open_params_t *meshlink_open_params_init(const char *confbase, const char *name, const char *appname, dev_class_t devclass) {
1013 if(!confbase || !*confbase) {
1014 logger(NULL, MESHLINK_ERROR, "No confbase given!\n");
1015 meshlink_errno = MESHLINK_EINVAL;
1019 if(!appname || !*appname) {
1020 logger(NULL, MESHLINK_ERROR, "No appname given!\n");
1021 meshlink_errno = MESHLINK_EINVAL;
1025 if(strchr(appname, ' ')) {
1026 logger(NULL, MESHLINK_ERROR, "Invalid appname given!\n");
1027 meshlink_errno = MESHLINK_EINVAL;
1031 if(!name || !*name) {
1032 logger(NULL, MESHLINK_ERROR, "No name given!\n");
1033 meshlink_errno = MESHLINK_EINVAL;
1037 if(!check_id(name)) {
1038 logger(NULL, MESHLINK_ERROR, "Invalid name given!\n");
1039 meshlink_errno = MESHLINK_EINVAL;
1043 if(devclass < 0 || devclass >= DEV_CLASS_COUNT) {
1044 logger(NULL, MESHLINK_ERROR, "Invalid devclass given!\n");
1045 meshlink_errno = MESHLINK_EINVAL;
1049 meshlink_open_params_t *params = xzalloc(sizeof * params);
1051 params->confbase = xstrdup(confbase);
1052 params->name = xstrdup(name);
1053 params->appname = xstrdup(appname);
1054 params->devclass = devclass;
1060 bool meshlink_open_params_set_netns(meshlink_open_params_t *params, int netns) {
1062 meshlink_errno = MESHLINK_EINVAL;
1066 params->netns = netns;
1071 bool meshlink_open_params_set_storage_key(meshlink_open_params_t *params, const void *key, size_t keylen) {
1073 meshlink_errno = MESHLINK_EINVAL;
1077 if((!key && keylen) || (key && !keylen)) {
1078 logger(NULL, MESHLINK_ERROR, "Invalid key length!\n");
1079 meshlink_errno = MESHLINK_EINVAL;
1084 params->keylen = keylen;
1089 bool meshlink_encrypted_key_rotate(meshlink_handle_t *mesh, const void *new_key, size_t new_keylen) {
1090 if(!mesh || !new_key || !new_keylen) {
1091 logger(mesh, MESHLINK_ERROR, "Invalid arguments given!\n");
1092 meshlink_errno = MESHLINK_EINVAL;
1096 pthread_mutex_lock(&mesh->mutex);
1098 // Create hash for the new key
1099 void *new_config_key;
1100 new_config_key = xmalloc(CHACHA_POLY1305_KEYLEN);
1102 if(!prf(new_key, new_keylen, "MeshLink configuration key", 26, new_config_key, CHACHA_POLY1305_KEYLEN)) {
1103 logger(mesh, MESHLINK_ERROR, "Error creating new configuration key!\n");
1104 meshlink_errno = MESHLINK_EINTERNAL;
1105 pthread_mutex_unlock(&mesh->mutex);
1109 // Copy contents of the "current" confbase sub-directory to "new" confbase sub-directory with the new key
1111 if(!config_copy(mesh, "current", mesh->config_key, "new", new_config_key)) {
1112 logger(mesh, MESHLINK_ERROR, "Could not set up configuration in %s/old: %s\n", mesh->confbase, strerror(errno));
1113 meshlink_errno = MESHLINK_ESTORAGE;
1114 pthread_mutex_unlock(&mesh->mutex);
1118 devtool_keyrotate_probe(1);
1120 // Rename confbase/current/ to confbase/old
1122 if(!config_rename(mesh, "current", "old")) {
1123 logger(mesh, MESHLINK_ERROR, "Cannot rename %s/current to %s/old\n", mesh->confbase, mesh->confbase);
1124 meshlink_errno = MESHLINK_ESTORAGE;
1125 pthread_mutex_unlock(&mesh->mutex);
1129 devtool_keyrotate_probe(2);
1131 // Rename confbase/new/ to confbase/current
1133 if(!config_rename(mesh, "new", "current")) {
1134 logger(mesh, MESHLINK_ERROR, "Cannot rename %s/new to %s/current\n", mesh->confbase, mesh->confbase);
1135 meshlink_errno = MESHLINK_ESTORAGE;
1136 pthread_mutex_unlock(&mesh->mutex);
1140 devtool_keyrotate_probe(3);
1142 // Cleanup the "old" confbase sub-directory
1144 if(!config_destroy(mesh->confbase, "old")) {
1145 pthread_mutex_unlock(&mesh->mutex);
1149 // Change the mesh handle key with new key
1151 free(mesh->config_key);
1152 mesh->config_key = new_config_key;
1154 pthread_mutex_unlock(&mesh->mutex);
1159 void meshlink_open_params_free(meshlink_open_params_t *params) {
1161 meshlink_errno = MESHLINK_EINVAL;
1165 free(params->confbase);
1167 free(params->appname);
1172 /// Device class traits
1173 static const dev_class_traits_t default_class_traits[DEV_CLASS_COUNT] = {
1174 { .pingtimeout = 5, .pinginterval = 60, .min_connects = 3, .max_connects = 10000, .edge_weight = 1 }, // DEV_CLASS_BACKBONE
1175 { .pingtimeout = 5, .pinginterval = 60, .min_connects = 3, .max_connects = 100, .edge_weight = 3 }, // DEV_CLASS_STATIONARY
1176 { .pingtimeout = 5, .pinginterval = 60, .min_connects = 3, .max_connects = 3, .edge_weight = 6 }, // DEV_CLASS_PORTABLE
1177 { .pingtimeout = 5, .pinginterval = 60, .min_connects = 1, .max_connects = 1, .edge_weight = 9 }, // DEV_CLASS_UNKNOWN
1180 meshlink_handle_t *meshlink_open(const char *confbase, const char *name, const char *appname, dev_class_t devclass) {
1181 if(!confbase || !*confbase) {
1182 logger(NULL, MESHLINK_ERROR, "No confbase given!\n");
1183 meshlink_errno = MESHLINK_EINVAL;
1187 /* Create a temporary struct on the stack, to avoid allocating and freeing one. */
1188 meshlink_open_params_t params;
1189 memset(¶ms, 0, sizeof(params));
1191 params.confbase = (char *)confbase;
1192 params.name = (char *)name;
1193 params.appname = (char *)appname;
1194 params.devclass = devclass;
1197 return meshlink_open_ex(¶ms);
1200 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) {
1201 if(!confbase || !*confbase) {
1202 logger(NULL, MESHLINK_ERROR, "No confbase given!\n");
1203 meshlink_errno = MESHLINK_EINVAL;
1207 /* Create a temporary struct on the stack, to avoid allocating and freeing one. */
1208 meshlink_open_params_t params;
1209 memset(¶ms, 0, sizeof(params));
1211 params.confbase = (char *)confbase;
1212 params.name = (char *)name;
1213 params.appname = (char *)appname;
1214 params.devclass = devclass;
1217 if(!meshlink_open_params_set_storage_key(¶ms, key, keylen)) {
1221 return meshlink_open_ex(¶ms);
1224 meshlink_handle_t *meshlink_open_ephemeral(const char *name, const char *appname, dev_class_t devclass) {
1225 /* Create a temporary struct on the stack, to avoid allocating and freeing one. */
1226 meshlink_open_params_t params;
1227 memset(¶ms, 0, sizeof(params));
1229 params.name = (char *)name;
1230 params.appname = (char *)appname;
1231 params.devclass = devclass;
1234 return meshlink_open_ex(¶ms);
1237 meshlink_handle_t *meshlink_open_ex(const meshlink_open_params_t *params) {
1238 // Validate arguments provided by the application
1239 bool usingname = false;
1241 logger(NULL, MESHLINK_DEBUG, "meshlink_open called\n");
1243 if(!params->appname || !*params->appname) {
1244 logger(NULL, MESHLINK_ERROR, "No appname given!\n");
1245 meshlink_errno = MESHLINK_EINVAL;
1249 if(strchr(params->appname, ' ')) {
1250 logger(NULL, MESHLINK_ERROR, "Invalid appname given!\n");
1251 meshlink_errno = MESHLINK_EINVAL;
1255 if(!params->name || !*params->name) {
1256 logger(NULL, MESHLINK_ERROR, "No name given!\n");
1258 } else { //check name only if there is a name != NULL
1260 if(!check_id(params->name)) {
1261 logger(NULL, MESHLINK_ERROR, "Invalid name given!\n");
1262 meshlink_errno = MESHLINK_EINVAL;
1269 if(params->devclass < 0 || params->devclass >= DEV_CLASS_COUNT) {
1270 logger(NULL, MESHLINK_ERROR, "Invalid devclass given!\n");
1271 meshlink_errno = MESHLINK_EINVAL;
1275 if((params->key && !params->keylen) || (!params->key && params->keylen)) {
1276 logger(NULL, MESHLINK_ERROR, "Invalid key length!\n");
1277 meshlink_errno = MESHLINK_EINVAL;
1281 meshlink_handle_t *mesh = xzalloc(sizeof(meshlink_handle_t));
1283 if(params->confbase) {
1284 mesh->confbase = xstrdup(params->confbase);
1287 mesh->appname = xstrdup(params->appname);
1288 mesh->devclass = params->devclass;
1289 mesh->discovery = true;
1290 mesh->invitation_timeout = 604800; // 1 week
1291 mesh->netns = params->netns;
1292 mesh->submeshes = NULL;
1293 mesh->log_cb = global_log_cb;
1294 mesh->log_level = global_log_level;
1296 randomize(&mesh->prng_state, sizeof(mesh->prng_state));
1299 randomize(&mesh->session_id, sizeof(mesh->session_id));
1300 } while(mesh->session_id == 0);
1302 memcpy(mesh->dev_class_traits, default_class_traits, sizeof(default_class_traits));
1305 mesh->name = xstrdup(params->name);
1310 mesh->config_key = xmalloc(CHACHA_POLY1305_KEYLEN);
1312 if(!prf(params->key, params->keylen, "MeshLink configuration key", 26, mesh->config_key, CHACHA_POLY1305_KEYLEN)) {
1313 logger(NULL, MESHLINK_ERROR, "Error creating configuration key!\n");
1314 meshlink_close(mesh);
1315 meshlink_errno = MESHLINK_EINTERNAL;
1321 pthread_mutexattr_t attr;
1322 pthread_mutexattr_init(&attr);
1323 pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
1324 pthread_mutex_init(&mesh->mutex, &attr);
1326 mesh->threadstarted = false;
1327 event_loop_init(&mesh->loop);
1328 mesh->loop.data = mesh;
1330 meshlink_queue_init(&mesh->outpacketqueue);
1332 // Atomically lock the configuration directory.
1333 if(!main_config_lock(mesh)) {
1334 meshlink_close(mesh);
1338 // If no configuration exists yet, create it.
1340 if(!meshlink_confbase_exists(mesh)) {
1341 if(!meshlink_setup(mesh)) {
1342 logger(NULL, MESHLINK_ERROR, "Cannot create initial configuration\n");
1343 meshlink_close(mesh);
1347 if(!meshlink_read_config(mesh)) {
1348 logger(NULL, MESHLINK_ERROR, "Cannot read main configuration\n");
1349 meshlink_close(mesh);
1355 struct WSAData wsa_state;
1356 WSAStartup(MAKEWORD(2, 2), &wsa_state);
1359 // Setup up everything
1360 // TODO: we should not open listening sockets yet
1362 bool success = false;
1364 if(mesh->netns != -1) {
1368 if(pthread_create(&thr, NULL, setup_network_in_netns_thread, mesh) == 0) {
1369 void *retval = NULL;
1370 success = pthread_join(thr, &retval) == 0 && retval;
1374 meshlink_errno = MESHLINK_EINTERNAL;
1377 #endif // HAVE_SETNS
1379 success = setup_network(mesh);
1380 add_local_addresses(mesh);
1384 meshlink_close(mesh);
1385 meshlink_errno = MESHLINK_ENETWORK;
1389 add_local_addresses(mesh);
1391 if(!node_write_config(mesh, mesh->self)) {
1392 logger(NULL, MESHLINK_ERROR, "Cannot update configuration\n");
1396 idle_set(&mesh->loop, idle, mesh);
1398 logger(NULL, MESHLINK_DEBUG, "meshlink_open returning\n");
1402 meshlink_submesh_t *meshlink_submesh_open(meshlink_handle_t *mesh, const char *submesh) {
1403 meshlink_submesh_t *s = NULL;
1406 logger(NULL, MESHLINK_ERROR, "No mesh handle given!\n");
1407 meshlink_errno = MESHLINK_EINVAL;
1411 if(!submesh || !*submesh) {
1412 logger(NULL, MESHLINK_ERROR, "No submesh name given!\n");
1413 meshlink_errno = MESHLINK_EINVAL;
1418 pthread_mutex_lock(&mesh->mutex);
1420 s = (meshlink_submesh_t *)create_submesh(mesh, submesh);
1422 pthread_mutex_unlock(&mesh->mutex);
1427 static void *meshlink_main_loop(void *arg) {
1428 meshlink_handle_t *mesh = arg;
1430 if(mesh->netns != -1) {
1433 if(setns(mesh->netns, CLONE_NEWNET) != 0) {
1434 pthread_cond_signal(&mesh->cond);
1439 pthread_cond_signal(&mesh->cond);
1441 #endif // HAVE_SETNS
1446 if(mesh->discovery) {
1447 discovery_start(mesh);
1452 pthread_mutex_lock(&mesh->mutex);
1454 logger(mesh, MESHLINK_DEBUG, "Starting main_loop...\n");
1455 pthread_cond_broadcast(&mesh->cond);
1457 logger(mesh, MESHLINK_DEBUG, "main_loop returned.\n");
1459 pthread_mutex_unlock(&mesh->mutex);
1464 if(mesh->discovery) {
1465 discovery_stop(mesh);
1473 bool meshlink_start(meshlink_handle_t *mesh) {
1475 assert(mesh->private_key);
1478 meshlink_errno = MESHLINK_EINVAL;
1482 logger(mesh, MESHLINK_DEBUG, "meshlink_start called\n");
1484 pthread_mutex_lock(&mesh->mutex);
1486 assert(mesh->self->ecdsa);
1487 assert(!memcmp((uint8_t *)mesh->self->ecdsa + 64, (uint8_t *)mesh->private_key + 64, 32));
1489 if(mesh->threadstarted) {
1490 logger(mesh, MESHLINK_DEBUG, "thread was already running\n");
1491 pthread_mutex_unlock(&mesh->mutex);
1495 if(mesh->listen_socket[0].tcp.fd < 0) {
1496 logger(mesh, MESHLINK_ERROR, "Listening socket not open\n");
1497 meshlink_errno = MESHLINK_ENETWORK;
1501 mesh->thedatalen = 0;
1503 // TODO: open listening sockets first
1505 //Check that a valid name is set
1507 logger(mesh, MESHLINK_DEBUG, "No name given!\n");
1508 meshlink_errno = MESHLINK_EINVAL;
1509 pthread_mutex_unlock(&mesh->mutex);
1513 init_outgoings(mesh);
1515 // Start the main thread
1517 event_loop_start(&mesh->loop);
1519 if(pthread_create(&mesh->thread, NULL, meshlink_main_loop, mesh) != 0) {
1520 logger(mesh, MESHLINK_DEBUG, "Could not start thread: %s\n", strerror(errno));
1521 memset(&mesh->thread, 0, sizeof(mesh)->thread);
1522 meshlink_errno = MESHLINK_EINTERNAL;
1523 event_loop_stop(&mesh->loop);
1524 pthread_mutex_unlock(&mesh->mutex);
1528 pthread_cond_wait(&mesh->cond, &mesh->mutex);
1529 mesh->threadstarted = true;
1530 mesh->self->last_reachable = time(NULL);
1531 mesh->self->status.dirty = true;
1533 pthread_mutex_unlock(&mesh->mutex);
1537 void meshlink_stop(meshlink_handle_t *mesh) {
1539 meshlink_errno = MESHLINK_EINVAL;
1543 pthread_mutex_lock(&mesh->mutex);
1544 logger(mesh, MESHLINK_DEBUG, "meshlink_stop called\n");
1547 mesh->self->last_unreachable = time(NULL);
1548 mesh->self->status.dirty = true;
1551 // Shut down the main thread
1552 event_loop_stop(&mesh->loop);
1554 // Send ourselves a UDP packet to kick the event loop
1555 for(int i = 0; i < mesh->listen_sockets; i++) {
1557 socklen_t salen = sizeof(sa);
1559 if(getsockname(mesh->listen_socket[i].udp.fd, &sa.sa, &salen) == -1) {
1560 logger(mesh, MESHLINK_ERROR, "System call `%s' failed: %s", "getsockname", sockstrerror(sockerrno));
1564 if(sendto(mesh->listen_socket[i].udp.fd, "", 1, MSG_NOSIGNAL, &sa.sa, salen) == -1) {
1565 logger(mesh, MESHLINK_ERROR, "Could not send a UDP packet to ourself: %s", sockstrerror(sockerrno));
1569 if(mesh->threadstarted) {
1570 // Wait for the main thread to finish
1571 pthread_mutex_unlock(&mesh->mutex);
1572 pthread_join(mesh->thread, NULL);
1573 pthread_mutex_lock(&mesh->mutex);
1575 mesh->threadstarted = false;
1578 // Close all metaconnections
1579 if(mesh->connections) {
1580 for(list_node_t *node = mesh->connections->head, *next; node; node = next) {
1582 connection_t *c = node->data;
1584 terminate_connection(mesh, c, false);
1588 exit_outgoings(mesh);
1590 // Try to write out any changed node config files, ignore errors at this point.
1592 for splay_each(node_t, n, mesh->nodes) {
1593 if(n->status.dirty) {
1594 n->status.dirty = !node_write_config(mesh, n);
1599 pthread_mutex_unlock(&mesh->mutex);
1602 void meshlink_close(meshlink_handle_t *mesh) {
1604 meshlink_errno = MESHLINK_EINVAL;
1608 // stop can be called even if mesh has not been started
1609 meshlink_stop(mesh);
1611 // lock is not released after this
1612 pthread_mutex_lock(&mesh->mutex);
1614 // Close and free all resources used.
1616 close_network_connections(mesh);
1618 logger(mesh, MESHLINK_INFO, "Terminating");
1620 event_loop_exit(&mesh->loop);
1624 if(mesh->confbase) {
1630 ecdsa_free(mesh->invitation_key);
1632 if(mesh->netns != -1) {
1636 for(vpn_packet_t *packet; (packet = meshlink_queue_pop(&mesh->outpacketqueue));) {
1640 meshlink_queue_exit(&mesh->outpacketqueue);
1643 free(mesh->appname);
1644 free(mesh->confbase);
1645 free(mesh->config_key);
1646 ecdsa_free(mesh->private_key);
1648 main_config_unlock(mesh);
1650 pthread_mutex_unlock(&mesh->mutex);
1651 pthread_mutex_destroy(&mesh->mutex);
1653 memset(mesh, 0, sizeof(*mesh));
1658 bool meshlink_destroy(const char *confbase) {
1660 meshlink_errno = MESHLINK_EINVAL;
1664 /* Exit early if the confbase directory itself doesn't exist */
1665 if(access(confbase, F_OK) && errno == ENOENT) {
1669 /* Take the lock the same way meshlink_open() would. */
1670 char lockfilename[PATH_MAX];
1671 snprintf(lockfilename, sizeof(lockfilename), "%s" SLASH "meshlink.lock", confbase);
1673 FILE *lockfile = fopen(lockfilename, "w+");
1676 logger(NULL, MESHLINK_ERROR, "Could not open lock file %s: %s", lockfilename, strerror(errno));
1677 meshlink_errno = MESHLINK_ESTORAGE;
1682 fcntl(fileno(lockfile), F_SETFD, FD_CLOEXEC);
1686 // TODO: use _locking()?
1689 if(flock(fileno(lockfile), LOCK_EX | LOCK_NB) != 0) {
1690 logger(NULL, MESHLINK_ERROR, "Configuration directory %s still in use\n", lockfilename);
1692 meshlink_errno = MESHLINK_EBUSY;
1698 if(!config_destroy(confbase, "current") || !config_destroy(confbase, "new") || !config_destroy(confbase, "old")) {
1699 logger(NULL, MESHLINK_ERROR, "Cannot remove sub-directories in %s: %s\n", confbase, strerror(errno));
1703 if(unlink(lockfilename)) {
1704 logger(NULL, MESHLINK_ERROR, "Cannot remove lock file %s: %s\n", lockfilename, strerror(errno));
1706 meshlink_errno = MESHLINK_ESTORAGE;
1712 if(!sync_path(confbase)) {
1713 logger(NULL, MESHLINK_ERROR, "Cannot sync directory %s: %s\n", confbase, strerror(errno));
1714 meshlink_errno = MESHLINK_ESTORAGE;
1721 void meshlink_set_receive_cb(meshlink_handle_t *mesh, meshlink_receive_cb_t cb) {
1723 meshlink_errno = MESHLINK_EINVAL;
1727 pthread_mutex_lock(&mesh->mutex);
1728 mesh->receive_cb = cb;
1729 pthread_mutex_unlock(&mesh->mutex);
1732 void meshlink_set_connection_try_cb(meshlink_handle_t *mesh, meshlink_connection_try_cb_t cb) {
1734 meshlink_errno = MESHLINK_EINVAL;
1738 pthread_mutex_lock(&mesh->mutex);
1739 mesh->connection_try_cb = cb;
1740 pthread_mutex_unlock(&mesh->mutex);
1743 void meshlink_set_node_status_cb(meshlink_handle_t *mesh, meshlink_node_status_cb_t cb) {
1745 meshlink_errno = MESHLINK_EINVAL;
1749 pthread_mutex_lock(&mesh->mutex);
1750 mesh->node_status_cb = cb;
1751 pthread_mutex_unlock(&mesh->mutex);
1754 void meshlink_set_node_pmtu_cb(meshlink_handle_t *mesh, meshlink_node_pmtu_cb_t cb) {
1756 meshlink_errno = MESHLINK_EINVAL;
1760 pthread_mutex_lock(&mesh->mutex);
1761 mesh->node_pmtu_cb = cb;
1762 pthread_mutex_unlock(&mesh->mutex);
1765 void meshlink_set_node_duplicate_cb(meshlink_handle_t *mesh, meshlink_node_duplicate_cb_t cb) {
1767 meshlink_errno = MESHLINK_EINVAL;
1771 pthread_mutex_lock(&mesh->mutex);
1772 mesh->node_duplicate_cb = cb;
1773 pthread_mutex_unlock(&mesh->mutex);
1776 void meshlink_set_log_cb(meshlink_handle_t *mesh, meshlink_log_level_t level, meshlink_log_cb_t cb) {
1778 pthread_mutex_lock(&mesh->mutex);
1780 mesh->log_level = cb ? level : 0;
1781 pthread_mutex_unlock(&mesh->mutex);
1784 global_log_level = cb ? level : 0;
1788 void meshlink_set_error_cb(struct meshlink_handle *mesh, meshlink_error_cb_t cb) {
1790 meshlink_errno = MESHLINK_EINVAL;
1794 pthread_mutex_lock(&mesh->mutex);
1795 mesh->error_cb = cb;
1796 pthread_mutex_unlock(&mesh->mutex);
1799 bool meshlink_send(meshlink_handle_t *mesh, meshlink_node_t *destination, const void *data, size_t len) {
1800 meshlink_packethdr_t *hdr;
1802 // Validate arguments
1803 if(!mesh || !destination || len >= MAXSIZE - sizeof(*hdr)) {
1804 meshlink_errno = MESHLINK_EINVAL;
1813 meshlink_errno = MESHLINK_EINVAL;
1817 node_t *n = (node_t *)destination;
1819 if(n->status.blacklisted) {
1820 logger(mesh, MESHLINK_ERROR, "Node %s blacklisted, dropping packet\n", n->name);
1821 meshlink_errno = MESHLINK_EBLACKLISTED;
1825 // Prepare the packet
1826 vpn_packet_t *packet = malloc(sizeof(*packet));
1829 meshlink_errno = MESHLINK_ENOMEM;
1833 packet->probe = false;
1834 packet->tcp = false;
1835 packet->len = len + sizeof(*hdr);
1837 hdr = (meshlink_packethdr_t *)packet->data;
1838 memset(hdr, 0, sizeof(*hdr));
1839 // leave the last byte as 0 to make sure strings are always
1840 // null-terminated if they are longer than the buffer
1841 strncpy((char *)hdr->destination, destination->name, (sizeof(hdr)->destination) - 1);
1842 strncpy((char *)hdr->source, mesh->self->name, (sizeof(hdr)->source) - 1);
1844 memcpy(packet->data + sizeof(*hdr), data, len);
1847 if(!meshlink_queue_push(&mesh->outpacketqueue, packet)) {
1849 meshlink_errno = MESHLINK_ENOMEM;
1853 // Notify event loop
1854 signal_trigger(&mesh->loop, &mesh->datafromapp);
1859 void meshlink_send_from_queue(event_loop_t *loop, void *data) {
1861 meshlink_handle_t *mesh = data;
1862 vpn_packet_t *packet = meshlink_queue_pop(&mesh->outpacketqueue);
1868 mesh->self->in_packets++;
1869 mesh->self->in_bytes += packet->len;
1870 route(mesh, mesh->self, packet);
1875 ssize_t meshlink_get_pmtu(meshlink_handle_t *mesh, meshlink_node_t *destination) {
1876 if(!mesh || !destination) {
1877 meshlink_errno = MESHLINK_EINVAL;
1881 pthread_mutex_lock(&mesh->mutex);
1883 node_t *n = (node_t *)destination;
1885 if(!n->status.reachable) {
1886 pthread_mutex_unlock(&mesh->mutex);
1889 } else if(n->mtuprobes > 30 && n->minmtu) {
1890 pthread_mutex_unlock(&mesh->mutex);
1893 pthread_mutex_unlock(&mesh->mutex);
1898 char *meshlink_get_fingerprint(meshlink_handle_t *mesh, meshlink_node_t *node) {
1899 if(!mesh || !node) {
1900 meshlink_errno = MESHLINK_EINVAL;
1904 pthread_mutex_lock(&mesh->mutex);
1906 node_t *n = (node_t *)node;
1908 if(!node_read_public_key(mesh, n) || !n->ecdsa) {
1909 meshlink_errno = MESHLINK_EINTERNAL;
1910 pthread_mutex_unlock(&mesh->mutex);
1914 char *fingerprint = ecdsa_get_base64_public_key(n->ecdsa);
1917 meshlink_errno = MESHLINK_EINTERNAL;
1920 pthread_mutex_unlock(&mesh->mutex);
1924 meshlink_node_t *meshlink_get_self(meshlink_handle_t *mesh) {
1926 meshlink_errno = MESHLINK_EINVAL;
1930 return (meshlink_node_t *)mesh->self;
1933 meshlink_node_t *meshlink_get_node(meshlink_handle_t *mesh, const char *name) {
1934 if(!mesh || !name) {
1935 meshlink_errno = MESHLINK_EINVAL;
1941 pthread_mutex_lock(&mesh->mutex);
1942 n = lookup_node(mesh, (char *)name); // TODO: make lookup_node() use const
1943 pthread_mutex_unlock(&mesh->mutex);
1946 meshlink_errno = MESHLINK_ENOENT;
1949 return (meshlink_node_t *)n;
1952 meshlink_submesh_t *meshlink_get_submesh(meshlink_handle_t *mesh, const char *name) {
1953 if(!mesh || !name) {
1954 meshlink_errno = MESHLINK_EINVAL;
1958 meshlink_submesh_t *submesh = NULL;
1960 pthread_mutex_lock(&mesh->mutex);
1961 submesh = (meshlink_submesh_t *)lookup_submesh(mesh, name);
1962 pthread_mutex_unlock(&mesh->mutex);
1965 meshlink_errno = MESHLINK_ENOENT;
1971 meshlink_node_t **meshlink_get_all_nodes(meshlink_handle_t *mesh, meshlink_node_t **nodes, size_t *nmemb) {
1972 if(!mesh || !nmemb || (*nmemb && !nodes)) {
1973 meshlink_errno = MESHLINK_EINVAL;
1977 meshlink_node_t **result;
1980 pthread_mutex_lock(&mesh->mutex);
1982 *nmemb = mesh->nodes->count;
1983 result = realloc(nodes, *nmemb * sizeof(*nodes));
1986 meshlink_node_t **p = result;
1988 for splay_each(node_t, n, mesh->nodes) {
1989 *p++ = (meshlink_node_t *)n;
1994 meshlink_errno = MESHLINK_ENOMEM;
1997 pthread_mutex_unlock(&mesh->mutex);
2002 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) {
2003 meshlink_node_t **result;
2005 pthread_mutex_lock(&mesh->mutex);
2009 for splay_each(node_t, n, mesh->nodes) {
2010 if(search_node(n, condition)) {
2017 pthread_mutex_unlock(&mesh->mutex);
2021 result = realloc(nodes, *nmemb * sizeof(*nodes));
2024 meshlink_node_t **p = result;
2026 for splay_each(node_t, n, mesh->nodes) {
2027 if(search_node(n, condition)) {
2028 *p++ = (meshlink_node_t *)n;
2034 meshlink_errno = MESHLINK_ENOMEM;
2037 pthread_mutex_unlock(&mesh->mutex);
2042 static bool search_node_by_dev_class(const node_t *node, const void *condition) {
2043 dev_class_t *devclass = (dev_class_t *)condition;
2045 if(*devclass == (dev_class_t)node->devclass) {
2052 static bool search_node_by_submesh(const node_t *node, const void *condition) {
2053 if(condition == node->submesh) {
2065 static bool search_node_by_last_reachable(const node_t *node, const void *condition) {
2066 const struct time_range *range = condition;
2067 time_t start = node->last_reachable;
2068 time_t end = node->last_unreachable;
2078 if(range->end >= range->start) {
2079 return start <= range->end && end >= range->start;
2081 return start > range->start || end < range->end;
2085 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) {
2086 if(!mesh || devclass < 0 || devclass >= DEV_CLASS_COUNT || !nmemb) {
2087 meshlink_errno = MESHLINK_EINVAL;
2091 return meshlink_get_all_nodes_by_condition(mesh, &devclass, nodes, nmemb, search_node_by_dev_class);
2094 meshlink_node_t **meshlink_get_all_nodes_by_submesh(meshlink_handle_t *mesh, meshlink_submesh_t *submesh, meshlink_node_t **nodes, size_t *nmemb) {
2095 if(!mesh || !submesh || !nmemb) {
2096 meshlink_errno = MESHLINK_EINVAL;
2100 return meshlink_get_all_nodes_by_condition(mesh, submesh, nodes, nmemb, search_node_by_submesh);
2103 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) {
2104 if(!mesh || !nmemb) {
2105 meshlink_errno = MESHLINK_EINVAL;
2109 struct time_range range = {start, end};
2111 return meshlink_get_all_nodes_by_condition(mesh, &range, nodes, nmemb, search_node_by_last_reachable);
2114 dev_class_t meshlink_get_node_dev_class(meshlink_handle_t *mesh, meshlink_node_t *node) {
2115 if(!mesh || !node) {
2116 meshlink_errno = MESHLINK_EINVAL;
2120 dev_class_t devclass;
2122 pthread_mutex_lock(&mesh->mutex);
2124 devclass = ((node_t *)node)->devclass;
2126 pthread_mutex_unlock(&mesh->mutex);
2131 meshlink_submesh_t *meshlink_get_node_submesh(meshlink_handle_t *mesh, meshlink_node_t *node) {
2132 if(!mesh || !node) {
2133 meshlink_errno = MESHLINK_EINVAL;
2137 node_t *n = (node_t *)node;
2139 meshlink_submesh_t *s;
2141 s = (meshlink_submesh_t *)n->submesh;
2146 bool meshlink_sign(meshlink_handle_t *mesh, const void *data, size_t len, void *signature, size_t *siglen) {
2147 if(!mesh || !data || !len || !signature || !siglen) {
2148 meshlink_errno = MESHLINK_EINVAL;
2152 if(*siglen < MESHLINK_SIGLEN) {
2153 meshlink_errno = MESHLINK_EINVAL;
2157 pthread_mutex_lock(&mesh->mutex);
2159 if(!ecdsa_sign(mesh->private_key, data, len, signature)) {
2160 meshlink_errno = MESHLINK_EINTERNAL;
2161 pthread_mutex_unlock(&mesh->mutex);
2165 *siglen = MESHLINK_SIGLEN;
2166 pthread_mutex_unlock(&mesh->mutex);
2170 bool meshlink_verify(meshlink_handle_t *mesh, meshlink_node_t *source, const void *data, size_t len, const void *signature, size_t siglen) {
2171 if(!mesh || !data || !len || !signature) {
2172 meshlink_errno = MESHLINK_EINVAL;
2176 if(siglen != MESHLINK_SIGLEN) {
2177 meshlink_errno = MESHLINK_EINVAL;
2181 pthread_mutex_lock(&mesh->mutex);
2185 struct node_t *n = (struct node_t *)source;
2187 if(!node_read_public_key(mesh, n)) {
2188 meshlink_errno = MESHLINK_EINTERNAL;
2191 rval = ecdsa_verify(((struct node_t *)source)->ecdsa, data, len, signature);
2194 pthread_mutex_unlock(&mesh->mutex);
2198 static bool refresh_invitation_key(meshlink_handle_t *mesh) {
2199 pthread_mutex_lock(&mesh->mutex);
2201 size_t count = invitation_purge_old(mesh, time(NULL) - mesh->invitation_timeout);
2204 // TODO: Update invitation key if necessary?
2207 pthread_mutex_unlock(&mesh->mutex);
2209 return mesh->invitation_key;
2212 bool meshlink_set_canonical_address(meshlink_handle_t *mesh, meshlink_node_t *node, const char *address, const char *port) {
2213 if(!mesh || !node || !address) {
2214 meshlink_errno = MESHLINK_EINVAL;
2218 if(!is_valid_hostname(address)) {
2219 logger(mesh, MESHLINK_DEBUG, "Invalid character in address: %s\n", address);
2220 meshlink_errno = MESHLINK_EINVAL;
2224 if(port && !is_valid_port(port)) {
2225 logger(mesh, MESHLINK_DEBUG, "Invalid character in port: %s\n", address);
2226 meshlink_errno = MESHLINK_EINVAL;
2230 char *canonical_address;
2233 xasprintf(&canonical_address, "%s %s", address, port);
2235 canonical_address = xstrdup(address);
2238 pthread_mutex_lock(&mesh->mutex);
2240 node_t *n = (node_t *)node;
2241 free(n->canonical_address);
2242 n->canonical_address = canonical_address;
2244 if(!node_write_config(mesh, n)) {
2245 pthread_mutex_unlock(&mesh->mutex);
2249 pthread_mutex_unlock(&mesh->mutex);
2251 return config_sync(mesh, "current");
2254 bool meshlink_add_address(meshlink_handle_t *mesh, const char *address) {
2255 return meshlink_set_canonical_address(mesh, (meshlink_node_t *)mesh->self, address, NULL);
2258 bool meshlink_add_external_address(meshlink_handle_t *mesh) {
2260 meshlink_errno = MESHLINK_EINVAL;
2264 char *address = meshlink_get_external_address(mesh);
2270 bool rval = meshlink_add_address(mesh, address);
2276 int meshlink_get_port(meshlink_handle_t *mesh) {
2278 meshlink_errno = MESHLINK_EINVAL;
2283 meshlink_errno = MESHLINK_EINTERNAL;
2289 pthread_mutex_lock(&mesh->mutex);
2290 port = atoi(mesh->myport);
2291 pthread_mutex_unlock(&mesh->mutex);
2296 bool meshlink_set_port(meshlink_handle_t *mesh, int port) {
2297 if(!mesh || port < 0 || port >= 65536 || mesh->threadstarted) {
2298 meshlink_errno = MESHLINK_EINVAL;
2302 if(mesh->myport && port == atoi(mesh->myport)) {
2306 if(!try_bind(port)) {
2307 meshlink_errno = MESHLINK_ENETWORK;
2311 devtool_trybind_probe();
2315 pthread_mutex_lock(&mesh->mutex);
2317 if(mesh->threadstarted) {
2318 meshlink_errno = MESHLINK_EINVAL;
2323 xasprintf(&mesh->myport, "%d", port);
2325 /* Close down the network. This also deletes mesh->self. */
2326 close_network_connections(mesh);
2328 /* Recreate mesh->self. */
2329 mesh->self = new_node();
2330 mesh->self->name = xstrdup(mesh->name);
2331 mesh->self->devclass = mesh->devclass;
2332 mesh->self->session_id = mesh->session_id;
2333 xasprintf(&mesh->myport, "%d", port);
2335 if(!node_read_public_key(mesh, mesh->self)) {
2336 logger(NULL, MESHLINK_ERROR, "Could not read our host configuration file!");
2337 meshlink_errno = MESHLINK_ESTORAGE;
2338 free_node(mesh->self);
2341 } else if(!setup_network(mesh)) {
2342 meshlink_errno = MESHLINK_ENETWORK;
2346 /* Rebuild our own list of recent addresses */
2347 memset(mesh->self->recent, 0, sizeof(mesh->self->recent));
2348 add_local_addresses(mesh);
2350 /* Write meshlink.conf with the updated port number */
2351 write_main_config_files(mesh);
2353 rval = config_sync(mesh, "current");
2356 pthread_mutex_unlock(&mesh->mutex);
2358 return rval && meshlink_get_port(mesh) == port;
2361 void meshlink_set_invitation_timeout(meshlink_handle_t *mesh, int timeout) {
2362 mesh->invitation_timeout = timeout;
2365 char *meshlink_invite_ex(meshlink_handle_t *mesh, meshlink_submesh_t *submesh, const char *name, uint32_t flags) {
2366 meshlink_submesh_t *s = NULL;
2369 meshlink_errno = MESHLINK_EINVAL;
2374 s = (meshlink_submesh_t *)lookup_submesh(mesh, submesh->name);
2377 logger(mesh, MESHLINK_DEBUG, "Invalid SubMesh Handle.\n");
2378 meshlink_errno = MESHLINK_EINVAL;
2382 s = (meshlink_submesh_t *)mesh->self->submesh;
2385 pthread_mutex_lock(&mesh->mutex);
2387 // Check validity of the new node's name
2388 if(!check_id(name)) {
2389 logger(mesh, MESHLINK_ERROR, "Invalid name for node.\n");
2390 meshlink_errno = MESHLINK_EINVAL;
2391 pthread_mutex_unlock(&mesh->mutex);
2395 // Ensure no host configuration file with that name exists
2396 if(config_exists(mesh, "current", name)) {
2397 logger(mesh, MESHLINK_ERROR, "A host config file for %s already exists!\n", name);
2398 meshlink_errno = MESHLINK_EEXIST;
2399 pthread_mutex_unlock(&mesh->mutex);
2403 // Ensure no other nodes know about this name
2404 if(meshlink_get_node(mesh, name)) {
2405 logger(mesh, MESHLINK_ERROR, "A node with name %s is already known!\n", name);
2406 meshlink_errno = MESHLINK_EEXIST;
2407 pthread_mutex_unlock(&mesh->mutex);
2411 // Get the local address
2412 char *address = get_my_hostname(mesh, flags);
2415 logger(mesh, MESHLINK_ERROR, "No Address known for ourselves!\n");
2416 meshlink_errno = MESHLINK_ERESOLV;
2417 pthread_mutex_unlock(&mesh->mutex);
2421 if(!refresh_invitation_key(mesh)) {
2422 meshlink_errno = MESHLINK_EINTERNAL;
2423 pthread_mutex_unlock(&mesh->mutex);
2427 // If we changed our own host config file, write it out now
2428 if(mesh->self->status.dirty) {
2429 if(!node_write_config(mesh, mesh->self)) {
2430 logger(mesh, MESHLINK_ERROR, "Could not write our own host conifg file!\n");
2431 pthread_mutex_unlock(&mesh->mutex);
2438 // Create a hash of the key.
2439 char *fingerprint = ecdsa_get_base64_public_key(mesh->invitation_key);
2440 sha512(fingerprint, strlen(fingerprint), hash);
2441 b64encode_urlsafe(hash, hash, 18);
2443 // Create a random cookie for this invitation.
2445 randomize(cookie, 18);
2447 // Create a filename that doesn't reveal the cookie itself
2448 char buf[18 + strlen(fingerprint)];
2449 char cookiehash[64];
2450 memcpy(buf, cookie, 18);
2451 memcpy(buf + 18, fingerprint, sizeof(buf) - 18);
2452 sha512(buf, sizeof(buf), cookiehash);
2453 b64encode_urlsafe(cookiehash, cookiehash, 18);
2455 b64encode_urlsafe(cookie, cookie, 18);
2459 /* Construct the invitation file */
2460 uint8_t outbuf[4096];
2461 packmsg_output_t inv = {outbuf, sizeof(outbuf)};
2463 packmsg_add_uint32(&inv, MESHLINK_INVITATION_VERSION);
2464 packmsg_add_str(&inv, name);
2465 packmsg_add_str(&inv, s ? s->name : CORE_MESH);
2466 packmsg_add_int32(&inv, DEV_CLASS_UNKNOWN); /* TODO: allow this to be set by inviter? */
2468 /* TODO: Add several host config files to bootstrap connections.
2469 * Note: make sure we only add config files of nodes that are in the core mesh or the same submesh,
2470 * and are not blacklisted.
2472 config_t configs[5];
2473 memset(configs, 0, sizeof(configs));
2476 if(config_read(mesh, "current", mesh->self->name, &configs[count], mesh->config_key)) {
2480 /* Append host config files to the invitation file */
2481 packmsg_add_array(&inv, count);
2483 for(int i = 0; i < count; i++) {
2484 packmsg_add_bin(&inv, configs[i].buf, configs[i].len);
2485 config_free(&configs[i]);
2488 config_t config = {outbuf, packmsg_output_size(&inv, outbuf)};
2490 if(!invitation_write(mesh, "current", cookiehash, &config, mesh->config_key)) {
2491 logger(mesh, MESHLINK_DEBUG, "Could not create invitation file %s: %s\n", cookiehash, strerror(errno));
2492 meshlink_errno = MESHLINK_ESTORAGE;
2493 pthread_mutex_unlock(&mesh->mutex);
2497 // Create an URL from the local address, key hash and cookie
2499 xasprintf(&url, "%s/%s%s", address, hash, cookie);
2502 pthread_mutex_unlock(&mesh->mutex);
2506 char *meshlink_invite(meshlink_handle_t *mesh, meshlink_submesh_t *submesh, const char *name) {
2507 return meshlink_invite_ex(mesh, submesh, name, 0);
2510 bool meshlink_join(meshlink_handle_t *mesh, const char *invitation) {
2511 if(!mesh || !invitation) {
2512 meshlink_errno = MESHLINK_EINVAL;
2516 pthread_mutex_lock(&mesh->mutex);
2518 //Before doing meshlink_join make sure we are not connected to another mesh
2519 if(mesh->threadstarted) {
2520 logger(mesh, MESHLINK_ERROR, "Cannot join while started\n");
2521 meshlink_errno = MESHLINK_EINVAL;
2522 pthread_mutex_unlock(&mesh->mutex);
2526 // 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.
2527 if(mesh->nodes->count > 1) {
2528 logger(mesh, MESHLINK_ERROR, "Already part of an existing mesh\n");
2529 meshlink_errno = MESHLINK_EINVAL;
2530 pthread_mutex_unlock(&mesh->mutex);
2534 //TODO: think of a better name for this variable, or of a different way to tokenize the invitation URL.
2535 char copy[strlen(invitation) + 1];
2536 strcpy(copy, invitation);
2538 // Split the invitation URL into a list of hostname/port tuples, a key hash and a cookie.
2540 char *slash = strchr(copy, '/');
2548 if(strlen(slash) != 48) {
2552 char *address = copy;
2555 if(!b64decode(slash, mesh->hash, 18) || !b64decode(slash + 24, mesh->cookie, 18)) {
2559 // Generate a throw-away key for the invitation.
2560 ecdsa_t *key = ecdsa_generate();
2563 meshlink_errno = MESHLINK_EINTERNAL;
2564 pthread_mutex_unlock(&mesh->mutex);
2568 char *b64key = ecdsa_get_base64_public_key(key);
2572 while(address && *address) {
2573 // We allow commas in the address part to support multiple addresses in one invitation URL.
2574 comma = strchr(address, ',');
2580 // Split of the port
2581 port = strrchr(address, ':');
2589 // IPv6 address are enclosed in brackets, per RFC 3986
2590 if(*address == '[') {
2592 char *bracket = strchr(address, ']');
2605 // Connect to the meshlink daemon mentioned in the URL.
2606 struct addrinfo *ai = str2addrinfo(address, port, SOCK_STREAM);
2609 for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
2610 mesh->sock = socket_in_netns(aip->ai_family, aip->ai_socktype, aip->ai_protocol, mesh->netns);
2612 if(mesh->sock == -1) {
2613 logger(mesh, MESHLINK_DEBUG, "Could not open socket: %s\n", strerror(errno));
2614 meshlink_errno = MESHLINK_ENETWORK;
2618 set_timeout(mesh->sock, 5000);
2620 if(connect(mesh->sock, aip->ai_addr, aip->ai_addrlen)) {
2621 logger(mesh, MESHLINK_DEBUG, "Could not connect to %s port %s: %s\n", address, port, strerror(errno));
2622 meshlink_errno = MESHLINK_ENETWORK;
2623 closesocket(mesh->sock);
2631 meshlink_errno = MESHLINK_ERESOLV;
2634 if(mesh->sock != -1 || !comma) {
2641 if(mesh->sock == -1) {
2642 pthread_mutex_unlock(&mesh->mutex);
2646 logger(mesh, MESHLINK_DEBUG, "Connected to %s port %s...\n", address, port);
2648 // Tell him we have an invitation, and give him our throw-away key.
2652 if(!sendline(mesh->sock, "0 ?%s %d.%d %s", b64key, PROT_MAJOR, PROT_MINOR, mesh->appname)) {
2653 logger(mesh, MESHLINK_DEBUG, "Error sending request to %s port %s: %s\n", address, port, strerror(errno));
2654 closesocket(mesh->sock);
2655 meshlink_errno = MESHLINK_ENETWORK;
2656 pthread_mutex_unlock(&mesh->mutex);
2662 char hisname[4096] = "";
2663 int code, hismajor, hisminor = 0;
2665 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) {
2666 logger(mesh, MESHLINK_DEBUG, "Cannot read greeting from peer\n");
2667 closesocket(mesh->sock);
2668 meshlink_errno = MESHLINK_ENETWORK;
2669 pthread_mutex_unlock(&mesh->mutex);
2673 // Check if the hash of the key he gave us matches the hash in the URL.
2674 char *fingerprint = mesh->line + 2;
2677 if(sha512(fingerprint, strlen(fingerprint), hishash)) {
2678 logger(mesh, MESHLINK_DEBUG, "Could not create hash\n%s\n", mesh->line + 2);
2679 meshlink_errno = MESHLINK_EINTERNAL;
2680 pthread_mutex_unlock(&mesh->mutex);
2684 if(memcmp(hishash, mesh->hash, 18)) {
2685 logger(mesh, MESHLINK_DEBUG, "Peer has an invalid key!\n%s\n", mesh->line + 2);
2686 meshlink_errno = MESHLINK_EPEER;
2687 pthread_mutex_unlock(&mesh->mutex);
2692 ecdsa_t *hiskey = ecdsa_set_base64_public_key(fingerprint);
2695 meshlink_errno = MESHLINK_EINTERNAL;
2696 pthread_mutex_unlock(&mesh->mutex);
2700 // Start an SPTPS session
2701 if(!sptps_start(&mesh->sptps, mesh, true, false, key, hiskey, meshlink_invitation_label, sizeof(meshlink_invitation_label), invitation_send, invitation_receive)) {
2702 meshlink_errno = MESHLINK_EINTERNAL;
2703 pthread_mutex_unlock(&mesh->mutex);
2707 // Feed rest of input buffer to SPTPS
2708 if(!sptps_receive_data(&mesh->sptps, mesh->buffer, mesh->blen)) {
2709 meshlink_errno = MESHLINK_EPEER;
2710 pthread_mutex_unlock(&mesh->mutex);
2716 while((len = recv(mesh->sock, mesh->line, sizeof(mesh)->line, 0))) {
2718 if(errno == EINTR) {
2722 logger(mesh, MESHLINK_DEBUG, "Error reading data from %s port %s: %s\n", address, port, strerror(errno));
2723 meshlink_errno = MESHLINK_ENETWORK;
2724 pthread_mutex_unlock(&mesh->mutex);
2728 if(!sptps_receive_data(&mesh->sptps, mesh->line, len)) {
2729 meshlink_errno = MESHLINK_EPEER;
2730 pthread_mutex_unlock(&mesh->mutex);
2735 sptps_stop(&mesh->sptps);
2738 closesocket(mesh->sock);
2740 if(!mesh->success) {
2741 logger(mesh, MESHLINK_DEBUG, "Connection closed by peer, invitation cancelled.\n");
2742 meshlink_errno = MESHLINK_EPEER;
2743 pthread_mutex_unlock(&mesh->mutex);
2747 pthread_mutex_unlock(&mesh->mutex);
2751 logger(mesh, MESHLINK_DEBUG, "Invalid invitation URL\n");
2752 meshlink_errno = MESHLINK_EINVAL;
2753 pthread_mutex_unlock(&mesh->mutex);
2757 char *meshlink_export(meshlink_handle_t *mesh) {
2759 meshlink_errno = MESHLINK_EINVAL;
2763 // Create a config file on the fly.
2766 packmsg_output_t out = {buf, sizeof(buf)};
2767 packmsg_add_uint32(&out, MESHLINK_CONFIG_VERSION);
2768 packmsg_add_str(&out, mesh->name);
2769 packmsg_add_str(&out, CORE_MESH);
2771 pthread_mutex_lock(&mesh->mutex);
2773 packmsg_add_int32(&out, mesh->self->devclass);
2774 packmsg_add_bool(&out, mesh->self->status.blacklisted);
2775 packmsg_add_bin(&out, ecdsa_get_public_key(mesh->private_key), 32);
2776 packmsg_add_str(&out, mesh->self->canonical_address ? mesh->self->canonical_address : "");
2780 for(uint32_t i = 0; i < MAX_RECENT; i++) {
2781 if(mesh->self->recent[i].sa.sa_family) {
2788 packmsg_add_array(&out, count);
2790 for(uint32_t i = 0; i < count; i++) {
2791 packmsg_add_sockaddr(&out, &mesh->self->recent[i]);
2794 packmsg_add_int64(&out, 0);
2795 packmsg_add_int64(&out, 0);
2797 pthread_mutex_unlock(&mesh->mutex);
2799 if(!packmsg_output_ok(&out)) {
2800 logger(mesh, MESHLINK_DEBUG, "Error creating export data\n");
2801 meshlink_errno = MESHLINK_EINTERNAL;
2805 // Prepare a base64-encoded packmsg array containing our config file
2807 uint32_t len = packmsg_output_size(&out, buf);
2808 uint32_t len2 = ((len + 4) * 4) / 3 + 4;
2809 uint8_t *buf2 = xmalloc(len2);
2810 packmsg_output_t out2 = {buf2, len2};
2811 packmsg_add_array(&out2, 1);
2812 packmsg_add_bin(&out2, buf, packmsg_output_size(&out, buf));
2814 if(!packmsg_output_ok(&out2)) {
2815 logger(mesh, MESHLINK_DEBUG, "Error creating export data\n");
2816 meshlink_errno = MESHLINK_EINTERNAL;
2821 b64encode_urlsafe(buf2, (char *)buf2, packmsg_output_size(&out2, buf2));
2823 return (char *)buf2;
2826 bool meshlink_import(meshlink_handle_t *mesh, const char *data) {
2827 if(!mesh || !data) {
2828 meshlink_errno = MESHLINK_EINVAL;
2832 size_t datalen = strlen(data);
2833 uint8_t *buf = xmalloc(datalen);
2834 int buflen = b64decode(data, buf, datalen);
2837 logger(mesh, MESHLINK_DEBUG, "Invalid data\n");
2838 meshlink_errno = MESHLINK_EPEER;
2842 packmsg_input_t in = {buf, buflen};
2843 uint32_t count = packmsg_get_array(&in);
2846 logger(mesh, MESHLINK_DEBUG, "Invalid data\n");
2847 meshlink_errno = MESHLINK_EPEER;
2851 pthread_mutex_lock(&mesh->mutex);
2855 uint32_t len = packmsg_get_bin_raw(&in, &data);
2861 packmsg_input_t in2 = {data, len};
2862 uint32_t version = packmsg_get_uint32(&in2);
2863 char *name = packmsg_get_str_dup(&in2);
2865 if(!packmsg_input_ok(&in2) || version != MESHLINK_CONFIG_VERSION || !check_id(name)) {
2867 packmsg_input_invalidate(&in);
2871 if(!check_id(name)) {
2876 node_t *n = lookup_node(mesh, name);
2879 logger(mesh, MESHLINK_DEBUG, "Node %s already exists, not importing\n", name);
2887 config_t config = {data, len};
2889 if(!node_read_from_config(mesh, n, &config)) {
2891 packmsg_input_invalidate(&in);
2895 if(!config_write(mesh, "current", n->name, &config, mesh->config_key)) {
2903 pthread_mutex_unlock(&mesh->mutex);
2907 if(!packmsg_done(&in)) {
2908 logger(mesh, MESHLINK_ERROR, "Invalid data\n");
2909 meshlink_errno = MESHLINK_EPEER;
2913 if(!config_sync(mesh, "current")) {
2920 static bool blacklist(meshlink_handle_t *mesh, node_t *n) {
2921 if(n == mesh->self) {
2922 logger(mesh, MESHLINK_ERROR, "%s blacklisting itself?\n", n->name);
2923 meshlink_errno = MESHLINK_EINVAL;
2927 if(n->status.blacklisted) {
2928 logger(mesh, MESHLINK_DEBUG, "Node %s already blacklisted\n", n->name);
2932 n->status.blacklisted = true;
2934 /* Immediately shut down any connections we have with the blacklisted node.
2935 * We can't call terminate_connection(), because we might be called from a callback function.
2937 for list_each(connection_t, c, mesh->connections) {
2939 shutdown(c->socket, SHUT_RDWR);
2943 utcp_abort_all_connections(n->utcp);
2949 n->status.udp_confirmed = false;
2951 /* Graph updates will suppress status updates for blacklisted nodes, so we need to
2952 * manually call the status callback if necessary.
2954 if(n->status.reachable && mesh->node_status_cb) {
2955 mesh->node_status_cb(mesh, (meshlink_node_t *)n, false);
2958 return node_write_config(mesh, n) && config_sync(mesh, "current");
2961 bool meshlink_blacklist(meshlink_handle_t *mesh, meshlink_node_t *node) {
2962 if(!mesh || !node) {
2963 meshlink_errno = MESHLINK_EINVAL;
2967 pthread_mutex_lock(&mesh->mutex);
2969 if(!blacklist(mesh, (node_t *)node)) {
2970 pthread_mutex_unlock(&mesh->mutex);
2974 pthread_mutex_unlock(&mesh->mutex);
2976 logger(mesh, MESHLINK_DEBUG, "Blacklisted %s.\n", node->name);
2980 bool meshlink_blacklist_by_name(meshlink_handle_t *mesh, const char *name) {
2981 if(!mesh || !name) {
2982 meshlink_errno = MESHLINK_EINVAL;
2986 pthread_mutex_lock(&mesh->mutex);
2988 node_t *n = lookup_node(mesh, (char *)name);
2992 n->name = xstrdup(name);
2996 if(!blacklist(mesh, (node_t *)n)) {
2997 pthread_mutex_unlock(&mesh->mutex);
3001 pthread_mutex_unlock(&mesh->mutex);
3003 logger(mesh, MESHLINK_DEBUG, "Blacklisted %s.\n", name);
3007 static bool whitelist(meshlink_handle_t *mesh, node_t *n) {
3008 if(n == mesh->self) {
3009 logger(mesh, MESHLINK_ERROR, "%s whitelisting itself?\n", n->name);
3010 meshlink_errno = MESHLINK_EINVAL;
3014 if(!n->status.blacklisted) {
3015 logger(mesh, MESHLINK_DEBUG, "Node %s was already whitelisted\n", n->name);
3019 n->status.blacklisted = false;
3021 if(n->status.reachable) {
3022 update_node_status(mesh, n);
3025 return node_write_config(mesh, n) && config_sync(mesh, "current");
3028 bool meshlink_whitelist(meshlink_handle_t *mesh, meshlink_node_t *node) {
3029 if(!mesh || !node) {
3030 meshlink_errno = MESHLINK_EINVAL;
3034 pthread_mutex_lock(&mesh->mutex);
3036 if(!whitelist(mesh, (node_t *)node)) {
3037 pthread_mutex_unlock(&mesh->mutex);
3041 pthread_mutex_unlock(&mesh->mutex);
3043 logger(mesh, MESHLINK_DEBUG, "Whitelisted %s.\n", node->name);
3047 bool meshlink_whitelist_by_name(meshlink_handle_t *mesh, const char *name) {
3048 if(!mesh || !name) {
3049 meshlink_errno = MESHLINK_EINVAL;
3053 pthread_mutex_lock(&mesh->mutex);
3055 node_t *n = lookup_node(mesh, (char *)name);
3059 n->name = xstrdup(name);
3063 if(!whitelist(mesh, (node_t *)n)) {
3064 pthread_mutex_unlock(&mesh->mutex);
3068 pthread_mutex_unlock(&mesh->mutex);
3070 logger(mesh, MESHLINK_DEBUG, "Whitelisted %s.\n", name);
3074 void meshlink_set_default_blacklist(meshlink_handle_t *mesh, bool blacklist) {
3075 mesh->default_blacklist = blacklist;
3078 bool meshlink_forget_node(meshlink_handle_t *mesh, meshlink_node_t *node) {
3079 if(!mesh || !node) {
3080 meshlink_errno = MESHLINK_EINVAL;
3084 node_t *n = (node_t *)node;
3086 pthread_mutex_lock(&mesh->mutex);
3088 /* Check that the node is not reachable */
3089 if(n->status.reachable || n->connection) {
3090 pthread_mutex_unlock(&mesh->mutex);
3091 logger(mesh, MESHLINK_WARNING, "Could not forget %s: still reachable", n->name);
3095 /* Check that we don't have any active UTCP connections */
3096 if(n->utcp && utcp_is_active(n->utcp)) {
3097 pthread_mutex_unlock(&mesh->mutex);
3098 logger(mesh, MESHLINK_WARNING, "Could not forget %s: active UTCP connections", n->name);
3102 /* Check that we have no active connections to this node */
3103 for list_each(connection_t, c, mesh->connections) {
3105 pthread_mutex_unlock(&mesh->mutex);
3106 logger(mesh, MESHLINK_WARNING, "Could not forget %s: active connection", n->name);
3111 /* Remove any pending outgoings to this node */
3112 if(mesh->outgoings) {
3113 for list_each(outgoing_t, outgoing, mesh->outgoings) {
3114 if(outgoing->node == n) {
3115 list_delete_node(mesh->outgoings, node);
3120 /* Delete the config file for this node */
3121 if(!config_delete(mesh, "current", n->name)) {
3122 pthread_mutex_unlock(&mesh->mutex);
3126 /* Delete the node struct and any remaining edges referencing this node */
3129 pthread_mutex_unlock(&mesh->mutex);
3131 return config_sync(mesh, "current");
3134 /* Hint that a hostname may be found at an address
3135 * See header file for detailed comment.
3137 void meshlink_hint_address(meshlink_handle_t *mesh, meshlink_node_t *node, const struct sockaddr *addr) {
3138 if(!mesh || !node || !addr) {
3139 meshlink_errno = EINVAL;
3143 pthread_mutex_lock(&mesh->mutex);
3145 node_t *n = (node_t *)node;
3147 if(node_add_recent_address(mesh, n, (sockaddr_t *)addr)) {
3148 if(!node_write_config(mesh, n)) {
3149 logger(mesh, MESHLINK_DEBUG, "Could not update %s\n", n->name);
3153 pthread_mutex_unlock(&mesh->mutex);
3154 // @TODO do we want to fire off a connection attempt right away?
3157 static bool channel_pre_accept(struct utcp *utcp, uint16_t port) {
3159 node_t *n = utcp->priv;
3160 meshlink_handle_t *mesh = n->mesh;
3161 return mesh->channel_accept_cb;
3164 static void aio_signal(meshlink_handle_t *mesh, meshlink_channel_t *channel, meshlink_aio_buffer_t *aio) {
3166 if(aio->cb.buffer) {
3167 aio->cb.buffer(mesh, channel, aio->data, aio->len, aio->priv);
3171 aio->cb.fd(mesh, channel, aio->fd, aio->done, aio->priv);
3176 static ssize_t channel_recv(struct utcp_connection *connection, const void *data, size_t len) {
3177 meshlink_channel_t *channel = connection->priv;
3183 node_t *n = channel->node;
3184 meshlink_handle_t *mesh = n->mesh;
3186 if(n->status.destroyed) {
3187 meshlink_channel_close(mesh, channel);
3191 const char *p = data;
3194 while(channel->aio_receive) {
3195 meshlink_aio_buffer_t *aio = channel->aio_receive;
3196 size_t todo = aio->len - aio->done;
3203 memcpy((char *)aio->data + aio->done, p, todo);
3205 ssize_t result = write(aio->fd, p, todo);
3214 if(aio->done == aio->len) {
3215 channel->aio_receive = aio->next;
3216 aio_signal(mesh, channel, aio);
3228 if(channel->receive_cb) {
3229 channel->receive_cb(mesh, channel, p, left);
3235 static void channel_accept(struct utcp_connection *utcp_connection, uint16_t port) {
3236 node_t *n = utcp_connection->utcp->priv;
3242 meshlink_handle_t *mesh = n->mesh;
3244 if(!mesh->channel_accept_cb) {
3248 meshlink_channel_t *channel = xzalloc(sizeof(*channel));
3250 channel->c = utcp_connection;
3252 if(mesh->channel_accept_cb(mesh, channel, port, NULL, 0)) {
3253 utcp_accept(utcp_connection, channel_recv, channel);
3259 static ssize_t channel_send(struct utcp *utcp, const void *data, size_t len) {
3260 node_t *n = utcp->priv;
3262 if(n->status.destroyed) {
3266 meshlink_handle_t *mesh = n->mesh;
3267 return meshlink_send(mesh, (meshlink_node_t *)n, data, len) ? (ssize_t)len : -1;
3270 void meshlink_set_channel_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, meshlink_channel_receive_cb_t cb) {
3271 if(!mesh || !channel) {
3272 meshlink_errno = MESHLINK_EINVAL;
3276 channel->receive_cb = cb;
3279 static void channel_receive(meshlink_handle_t *mesh, meshlink_node_t *source, const void *data, size_t len) {
3281 node_t *n = (node_t *)source;
3287 utcp_recv(n->utcp, data, len);
3290 static void channel_poll(struct utcp_connection *connection, size_t len) {
3291 meshlink_channel_t *channel = connection->priv;
3297 node_t *n = channel->node;
3298 meshlink_handle_t *mesh = n->mesh;
3299 meshlink_aio_buffer_t *aio = channel->aio_send;
3302 /* We at least one AIO buffer. Send as much as possible form the first buffer. */
3303 size_t left = aio->len - aio->done;
3311 sent = utcp_send(connection, (char *)aio->data + aio->done, len);
3314 size_t todo = utcp_get_sndbuf_free(connection);
3320 if(todo > sizeof(buf)) {
3324 ssize_t result = read(aio->fd, buf, todo);
3327 sent = utcp_send(connection, buf, result);
3337 /* If the buffer is now completely sent, call the callback and dispose of it. */
3338 if(aio->done >= aio->len) {
3339 channel->aio_send = aio->next;
3340 aio_signal(mesh, channel, aio);
3344 if(channel->poll_cb) {
3345 channel->poll_cb(mesh, channel, len);
3347 utcp_set_poll_cb(connection, NULL);
3352 void meshlink_set_channel_poll_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, meshlink_channel_poll_cb_t cb) {
3353 if(!mesh || !channel) {
3354 meshlink_errno = MESHLINK_EINVAL;
3358 pthread_mutex_lock(&mesh->mutex);
3359 channel->poll_cb = cb;
3360 utcp_set_poll_cb(channel->c, (cb || channel->aio_send) ? channel_poll : NULL);
3361 pthread_mutex_unlock(&mesh->mutex);
3364 void meshlink_set_channel_accept_cb(meshlink_handle_t *mesh, meshlink_channel_accept_cb_t cb) {
3366 meshlink_errno = MESHLINK_EINVAL;
3370 pthread_mutex_lock(&mesh->mutex);
3371 mesh->channel_accept_cb = cb;
3372 mesh->receive_cb = channel_receive;
3374 for splay_each(node_t, n, mesh->nodes) {
3375 if(!n->utcp && n != mesh->self) {
3376 n->utcp = utcp_init(channel_accept, channel_pre_accept, channel_send, n);
3380 pthread_mutex_unlock(&mesh->mutex);
3383 void meshlink_set_channel_sndbuf(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_sndbuf(channel->c, size);
3393 pthread_mutex_unlock(&mesh->mutex);
3396 void meshlink_set_channel_rcvbuf(meshlink_handle_t *mesh, meshlink_channel_t *channel, size_t size) {
3400 meshlink_errno = MESHLINK_EINVAL;
3404 pthread_mutex_lock(&mesh->mutex);
3405 utcp_set_rcvbuf(channel->c, size);
3406 pthread_mutex_unlock(&mesh->mutex);
3409 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) {
3411 abort(); // TODO: handle non-NULL data
3414 if(!mesh || !node) {
3415 meshlink_errno = MESHLINK_EINVAL;
3419 pthread_mutex_lock(&mesh->mutex);
3421 node_t *n = (node_t *)node;
3424 n->utcp = utcp_init(channel_accept, channel_pre_accept, channel_send, n);
3425 mesh->receive_cb = channel_receive;
3428 meshlink_errno = errno == ENOMEM ? MESHLINK_ENOMEM : MESHLINK_EINTERNAL;
3429 pthread_mutex_unlock(&mesh->mutex);
3434 if(n->status.blacklisted) {
3435 logger(mesh, MESHLINK_ERROR, "Cannot open a channel with blacklisted node\n");
3436 meshlink_errno = MESHLINK_EBLACKLISTED;
3437 pthread_mutex_unlock(&mesh->mutex);
3441 meshlink_channel_t *channel = xzalloc(sizeof(*channel));
3443 channel->receive_cb = cb;
3446 channel->priv = (void *)data;
3449 channel->c = utcp_connect_ex(n->utcp, port, channel_recv, channel, flags);
3451 pthread_mutex_unlock(&mesh->mutex);
3454 meshlink_errno = errno == ENOMEM ? MESHLINK_ENOMEM : MESHLINK_EINTERNAL;
3462 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) {
3463 return meshlink_channel_open_ex(mesh, node, port, cb, data, len, MESHLINK_CHANNEL_TCP);
3466 void meshlink_channel_shutdown(meshlink_handle_t *mesh, meshlink_channel_t *channel, int direction) {
3467 if(!mesh || !channel) {
3468 meshlink_errno = MESHLINK_EINVAL;
3472 pthread_mutex_lock(&mesh->mutex);
3473 utcp_shutdown(channel->c, direction);
3474 pthread_mutex_unlock(&mesh->mutex);
3477 void meshlink_channel_close(meshlink_handle_t *mesh, meshlink_channel_t *channel) {
3478 if(!mesh || !channel) {
3479 meshlink_errno = MESHLINK_EINVAL;
3483 pthread_mutex_lock(&mesh->mutex);
3485 utcp_close(channel->c);
3487 /* Clean up any outstanding AIO buffers. */
3488 for(meshlink_aio_buffer_t *aio = channel->aio_send, *next; aio; aio = next) {
3490 aio_signal(mesh, channel, aio);
3494 for(meshlink_aio_buffer_t *aio = channel->aio_receive, *next; aio; aio = next) {
3496 aio_signal(mesh, channel, aio);
3500 pthread_mutex_unlock(&mesh->mutex);
3505 ssize_t meshlink_channel_send(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len) {
3506 if(!mesh || !channel) {
3507 meshlink_errno = MESHLINK_EINVAL;
3516 meshlink_errno = MESHLINK_EINVAL;
3520 // TODO: more finegrained locking.
3521 // Ideally we want to put the data into the UTCP connection's send buffer.
3522 // Then, preferably only if there is room in the receiver window,
3523 // kick the meshlink thread to go send packets.
3527 pthread_mutex_lock(&mesh->mutex);
3529 /* Disallow direct calls to utcp_send() while we still have AIO active. */
3530 if(channel->aio_send) {
3533 retval = utcp_send(channel->c, data, len);
3536 pthread_mutex_unlock(&mesh->mutex);
3539 meshlink_errno = MESHLINK_ENETWORK;
3545 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) {
3546 if(!mesh || !channel) {
3547 meshlink_errno = MESHLINK_EINVAL;
3552 meshlink_errno = MESHLINK_EINVAL;
3556 meshlink_aio_buffer_t *aio = xzalloc(sizeof(*aio));
3559 aio->cb.buffer = cb;
3562 pthread_mutex_lock(&mesh->mutex);
3564 /* Append the AIO buffer descriptor to the end of the chain */
3565 meshlink_aio_buffer_t **p = &channel->aio_send;
3573 /* Ensure the poll callback is set, and call it right now to push data if possible */
3574 utcp_set_poll_cb(channel->c, channel_poll);
3575 channel_poll(channel->c, len);
3577 pthread_mutex_unlock(&mesh->mutex);
3582 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) {
3583 if(!mesh || !channel) {
3584 meshlink_errno = MESHLINK_EINVAL;
3588 if(!len || fd == -1) {
3589 meshlink_errno = MESHLINK_EINVAL;
3593 meshlink_aio_buffer_t *aio = xzalloc(sizeof(*aio));
3599 pthread_mutex_lock(&mesh->mutex);
3601 /* Append the AIO buffer descriptor to the end of the chain */
3602 meshlink_aio_buffer_t **p = &channel->aio_send;
3610 /* Ensure the poll callback is set, and call it right now to push data if possible */
3611 utcp_set_poll_cb(channel->c, channel_poll);
3612 channel_poll(channel->c, len);
3614 pthread_mutex_unlock(&mesh->mutex);
3619 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) {
3620 if(!mesh || !channel) {
3621 meshlink_errno = MESHLINK_EINVAL;
3626 meshlink_errno = MESHLINK_EINVAL;
3630 meshlink_aio_buffer_t *aio = xzalloc(sizeof(*aio));
3633 aio->cb.buffer = cb;
3636 pthread_mutex_lock(&mesh->mutex);
3638 /* Append the AIO buffer descriptor to the end of the chain */
3639 meshlink_aio_buffer_t **p = &channel->aio_receive;
3647 pthread_mutex_unlock(&mesh->mutex);
3652 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) {
3653 if(!mesh || !channel) {
3654 meshlink_errno = MESHLINK_EINVAL;
3658 if(!len || fd == -1) {
3659 meshlink_errno = MESHLINK_EINVAL;
3663 meshlink_aio_buffer_t *aio = xzalloc(sizeof(*aio));
3669 pthread_mutex_lock(&mesh->mutex);
3671 /* Append the AIO buffer descriptor to the end of the chain */
3672 meshlink_aio_buffer_t **p = &channel->aio_receive;
3680 pthread_mutex_unlock(&mesh->mutex);
3685 uint32_t meshlink_channel_get_flags(meshlink_handle_t *mesh, meshlink_channel_t *channel) {
3686 if(!mesh || !channel) {
3687 meshlink_errno = MESHLINK_EINVAL;
3691 return channel->c->flags;
3694 size_t meshlink_channel_get_sendq(meshlink_handle_t *mesh, meshlink_channel_t *channel) {
3695 if(!mesh || !channel) {
3696 meshlink_errno = MESHLINK_EINVAL;
3700 return utcp_get_sendq(channel->c);
3703 size_t meshlink_channel_get_recvq(meshlink_handle_t *mesh, meshlink_channel_t *channel) {
3704 if(!mesh || !channel) {
3705 meshlink_errno = MESHLINK_EINVAL;
3709 return utcp_get_recvq(channel->c);
3712 void meshlink_set_node_channel_timeout(meshlink_handle_t *mesh, meshlink_node_t *node, int timeout) {
3713 if(!mesh || !node) {
3714 meshlink_errno = MESHLINK_EINVAL;
3718 node_t *n = (node_t *)node;
3720 pthread_mutex_lock(&mesh->mutex);
3723 n->utcp = utcp_init(channel_accept, channel_pre_accept, channel_send, n);
3726 utcp_set_user_timeout(n->utcp, timeout);
3728 pthread_mutex_unlock(&mesh->mutex);
3731 void update_node_status(meshlink_handle_t *mesh, node_t *n) {
3732 if(n->status.reachable && mesh->channel_accept_cb && !n->utcp) {
3733 n->utcp = utcp_init(channel_accept, channel_pre_accept, channel_send, n);
3736 if(mesh->node_status_cb) {
3737 mesh->node_status_cb(mesh, (meshlink_node_t *)n, n->status.reachable && !n->status.blacklisted);
3740 if(mesh->node_pmtu_cb) {
3741 mesh->node_pmtu_cb(mesh, (meshlink_node_t *)n, n->minmtu);
3745 void update_node_pmtu(meshlink_handle_t *mesh, node_t *n) {
3746 if(mesh->node_pmtu_cb && !n->status.blacklisted) {
3747 mesh->node_pmtu_cb(mesh, (meshlink_node_t *)n, n->minmtu);
3751 void handle_duplicate_node(meshlink_handle_t *mesh, node_t *n) {
3752 if(!mesh->node_duplicate_cb || n->status.duplicate) {
3756 n->status.duplicate = true;
3757 mesh->node_duplicate_cb(mesh, (meshlink_node_t *)n);
3760 void meshlink_enable_discovery(meshlink_handle_t *mesh, bool enable) {
3764 meshlink_errno = MESHLINK_EINVAL;
3768 pthread_mutex_lock(&mesh->mutex);
3770 if(mesh->discovery == enable) {
3774 if(mesh->threadstarted) {
3776 discovery_start(mesh);
3778 discovery_stop(mesh);
3782 mesh->discovery = enable;
3785 pthread_mutex_unlock(&mesh->mutex);
3789 meshlink_errno = MESHLINK_ENOTSUP;
3793 void meshlink_set_dev_class_timeouts(meshlink_handle_t *mesh, dev_class_t devclass, int pinginterval, int pingtimeout) {
3794 if(!mesh || devclass < 0 || devclass >= DEV_CLASS_COUNT) {
3795 meshlink_errno = EINVAL;
3799 if(pinginterval < 1 || pingtimeout < 1 || pingtimeout > pinginterval) {
3800 meshlink_errno = EINVAL;
3804 pthread_mutex_lock(&mesh->mutex);
3805 mesh->dev_class_traits[devclass].pinginterval = pinginterval;
3806 mesh->dev_class_traits[devclass].pingtimeout = pingtimeout;
3807 pthread_mutex_unlock(&mesh->mutex);
3810 void handle_network_change(meshlink_handle_t *mesh, bool online) {
3813 if(!mesh->connections || !mesh->loop.running) {
3820 void call_error_cb(meshlink_handle_t *mesh, meshlink_errno_t meshlink_errno) {
3821 // We should only call the callback function if we are in the background thread.
3822 if(!mesh->error_cb) {
3826 if(!mesh->threadstarted) {
3830 if(mesh->thread == pthread_self()) {
3831 mesh->error_cb(mesh, meshlink_errno);
3836 static void __attribute__((constructor)) meshlink_init(void) {
3840 static void __attribute__((destructor)) meshlink_exit(void) {