#include "system.h"
-#include <catta/core.h>
-#include <catta/lookup.h>
-#include <catta/publish.h>
-#include <catta/log.h>
-#include <catta/simple-watch.h>
-#include <catta/malloc.h>
-#include <catta/alternative.h>
-#include <catta/error.h>
-
#if defined(__APPLE__) || defined(__unix) && !defined(__linux)
#include <net/route.h>
#elif defined(__linux)
.in6.sin6_port = 0xe914,
};
-static void generate_rand_string(meshlink_handle_t *mesh, char *buffer, size_t size) {
- assert(size);
-
- for(size_t i = 0; i < (size - 1); ++i) {
- buffer[i] = 'a' + prng(mesh, 'z' - 'a' + 1);
- }
-
- buffer[size - 1] = '\0';
-}
-
-static void discovery_entry_group_callback(CattaServer *server, CattaSEntryGroup *group, CattaEntryGroupState state, void *userdata) {
- (void)server;
- (void)group;
- meshlink_handle_t *mesh = userdata;
-
- assert(mesh);
- assert(mesh->catta_server);
- assert(mesh->catta_poll);
-
- /* Called whenever the entry group state changes */
- switch(state) {
- case CATTA_ENTRY_GROUP_ESTABLISHED:
- /* The entry group has been established successfully */
- logger(mesh, MESHLINK_DEBUG, "Catta Service successfully established.\n");
- break;
-
- case CATTA_ENTRY_GROUP_COLLISION:
- logger(mesh, MESHLINK_WARNING, "Catta Service collision.\n");
- // @TODO can we just set a new name and retry?
- break;
-
- case CATTA_ENTRY_GROUP_FAILURE :
- /* Some kind of failure happened while we were registering our services */
- logger(mesh, MESHLINK_ERROR, "Catta Entry group failure: %s\n", catta_strerror(catta_server_errno(mesh->catta_server)));
- catta_simple_poll_quit(mesh->catta_poll);
- break;
-
- case CATTA_ENTRY_GROUP_UNCOMMITED:
- case CATTA_ENTRY_GROUP_REGISTERING:
- break;
- }
-}
-
-
-static void discovery_create_services(meshlink_handle_t *mesh) {
- char *fingerprint = NULL;
- char *txt_name = NULL;
- char *txt_fingerprint = NULL;
-
- assert(mesh);
- assert(mesh->name);
- assert(mesh->myport);
- assert(mesh->catta_server);
- assert(mesh->catta_poll);
- assert(mesh->catta_servicetype);
- assert(mesh->self);
-
- logger(mesh, MESHLINK_DEBUG, "Adding service\n");
-
- /* If this is the first time we're called, let's create a new entry group */
- if(!(mesh->catta_group = catta_s_entry_group_new(mesh->catta_server, discovery_entry_group_callback, mesh))) {
- logger(mesh, MESHLINK_ERROR, "catta_entry_group_new() failed: %s\n", catta_strerror(catta_server_errno(mesh->catta_server)));
- goto fail;
- }
-
- /* Create txt records */
- fingerprint = meshlink_get_fingerprint(mesh, (meshlink_node_t *)mesh->self);
- xasprintf(&txt_name, "%s=%s", MESHLINK_MDNS_NAME_KEY, mesh->name);
- xasprintf(&txt_fingerprint, "%s=%s", MESHLINK_MDNS_FINGERPRINT_KEY, fingerprint);
-
- /* Add the service */
- int ret = 0;
-
- if((ret = catta_server_add_service(mesh->catta_server, mesh->catta_group, CATTA_IF_UNSPEC, CATTA_PROTO_UNSPEC, 0, fingerprint, mesh->catta_servicetype, NULL, NULL, atoi(mesh->myport), txt_name, txt_fingerprint, NULL)) < 0) {
- logger(mesh, MESHLINK_ERROR, "Failed to add service: %s\n", catta_strerror(ret));
- goto fail;
- }
-
- /* Tell the server to register the service */
- if((ret = catta_s_entry_group_commit(mesh->catta_group)) < 0) {
- logger(mesh, MESHLINK_ERROR, "Failed to commit entry_group: %s\n", catta_strerror(ret));
- goto fail;
- }
-
- goto done;
-
-fail:
- catta_simple_poll_quit(mesh->catta_poll);
-
-done:
- free(fingerprint);
- free(txt_name);
- free(txt_fingerprint);
-}
-
-static void discovery_server_callback(CattaServer *server, CattaServerState state, void *userdata) {
- (void)server;
- meshlink_handle_t *mesh = userdata;
-
- assert(mesh);
-
- switch(state) {
- case CATTA_SERVER_RUNNING:
-
- /* The serve has startup successfully and registered its host
- * name on the network, so it's time to create our services */
- if(pthread_mutex_lock(&mesh->mutex) != 0) {
- abort();
- }
-
- if(!mesh->catta_group) {
- discovery_create_services(mesh);
- }
-
- pthread_mutex_unlock(&mesh->mutex);
-
- break;
-
- case CATTA_SERVER_COLLISION: {
- /* A host name collision happened. Let's pick a new name for the server */
- char hostname[17];
- generate_rand_string(mesh, hostname, sizeof(hostname));
-
- if(pthread_mutex_lock(&mesh->mutex) != 0) {
- abort();
- }
-
- assert(mesh->catta_server);
- assert(mesh->catta_poll);
-
- int result = catta_server_set_host_name(mesh->catta_server, hostname);
-
- if(result < 0) {
- catta_simple_poll_quit(mesh->catta_poll);
- }
-
- pthread_mutex_unlock(&mesh->mutex);
- }
- break;
-
- case CATTA_SERVER_REGISTERING:
- if(pthread_mutex_lock(&mesh->mutex) != 0) {
- abort();
- }
-
- /* Let's drop our registered services. When the server is back
- * in CATTA_SERVER_RUNNING state we will register them
- * again with the new host name. */
- if(mesh->catta_group) {
- catta_s_entry_group_reset(mesh->catta_group);
- mesh->catta_group = NULL;
- }
-
- pthread_mutex_unlock(&mesh->mutex);
-
- break;
-
- case CATTA_SERVER_FAILURE:
- if(pthread_mutex_lock(&mesh->mutex) != 0) {
- abort();
- }
-
- assert(mesh->catta_server);
- assert(mesh->catta_poll);
-
- /* Terminate on failure */
- catta_simple_poll_quit(mesh->catta_poll);
-
- pthread_mutex_unlock(&mesh->mutex);
- break;
-
- case CATTA_SERVER_INVALID:
- break;
- }
-}
-
-static void discovery_resolve_callback(CattaSServiceResolver *resolver, CattaIfIndex interface_, CattaProtocol protocol, CattaResolverEvent event, const char *name, const char *type, const char *domain, const char *host_name, const CattaAddress *address, uint16_t port, CattaStringList *txt, CattaLookupResultFlags flags, void *userdata) {
- (void)interface_;
- (void)protocol;
- (void)flags;
- (void)name;
- (void)type;
- (void)domain;
- (void)host_name;
-
- meshlink_handle_t *mesh = userdata;
-
- assert(mesh);
-
- if(event != CATTA_RESOLVER_FOUND) {
- catta_s_service_resolver_free(resolver);
- return;
- }
-
- // retrieve fingerprint
- CattaStringList *node_name_li = catta_string_list_find(txt, MESHLINK_MDNS_NAME_KEY);
- CattaStringList *node_fp_li = catta_string_list_find(txt, MESHLINK_MDNS_FINGERPRINT_KEY);
-
- if(node_name_li && node_fp_li) {
- char *node_name = (char *)catta_string_list_get_text(node_name_li) + strlen(MESHLINK_MDNS_NAME_KEY);
- char *node_fp = (char *)catta_string_list_get_text(node_fp_li) + strlen(MESHLINK_MDNS_FINGERPRINT_KEY);
-
- if(node_name[0] == '=' && node_fp[0] == '=') {
- if(pthread_mutex_lock(&mesh->mutex) != 0) {
- abort();
- }
-
- node_name += 1;
-
- meshlink_node_t *node = meshlink_get_node(mesh, node_name);
-
- if(node) {
- logger(mesh, MESHLINK_INFO, "Node %s is part of the mesh network.\n", node->name);
-
- sockaddr_t naddress;
- memset(&naddress, 0, sizeof(naddress));
-
- switch(address->proto) {
- case CATTA_PROTO_INET: {
- naddress.in.sin_family = AF_INET;
- naddress.in.sin_port = htons(port);
- naddress.in.sin_addr.s_addr = address->data.ipv4.address;
- }
- break;
-
- case CATTA_PROTO_INET6: {
- naddress.in6.sin6_family = AF_INET6;
- naddress.in6.sin6_port = htons(port);
- memcpy(naddress.in6.sin6_addr.s6_addr, address->data.ipv6.address, sizeof(naddress.in6.sin6_addr.s6_addr));
- }
- break;
-
- default:
- naddress.unknown.family = AF_UNKNOWN;
- break;
- }
-
- if(naddress.unknown.family != AF_UNKNOWN) {
- node_t *n = (node_t *)node;
- connection_t *c = n->connection;
-
- n->catta_address = naddress;
- node_add_recent_address(mesh, n, &naddress);
-
- if(c && c->outgoing && !c->status.active) {
- c->outgoing->timeout = 0;
-
- if(c->outgoing->ev.cb) {
- timeout_set(&mesh->loop, &c->outgoing->ev, &(struct timespec) {
- 0, 0
- });
- }
-
- c->last_ping_time = -3600;
- }
-
- } else {
- logger(mesh, MESHLINK_WARNING, "Could not resolve node %s to a known address family type.\n", node->name);
- }
- } else {
- logger(mesh, MESHLINK_WARNING, "Node %s is not part of the mesh network.\n", node_name);
- }
-
- pthread_mutex_unlock(&mesh->mutex);
- }
- }
-
- catta_s_service_resolver_free(resolver);
-}
-
-static void discovery_browse_callback(CattaSServiceBrowser *browser, CattaIfIndex interface_, CattaProtocol protocol, CattaBrowserEvent event, const char *name, const char *type, const char *domain, CattaLookupResultFlags flags, void *userdata) {
- (void)browser;
- (void)flags;
- meshlink_handle_t *mesh = userdata;
-
- /* Called whenever a new services becomes available on the LAN or is removed from the LAN */
- switch(event) {
- case CATTA_BROWSER_FAILURE:
- if(pthread_mutex_lock(&mesh->mutex) != 0) {
- abort();
- }
-
- catta_simple_poll_quit(mesh->catta_poll);
- pthread_mutex_unlock(&mesh->mutex);
- break;
-
- case CATTA_BROWSER_NEW:
- if(pthread_mutex_lock(&mesh->mutex) != 0) {
- abort();
- }
-
- catta_s_service_resolver_new(mesh->catta_server, interface_, protocol, name, type, domain, CATTA_PROTO_UNSPEC, 0, discovery_resolve_callback, mesh);
- handle_network_change(mesh, ++mesh->catta_interfaces);
- pthread_mutex_unlock(&mesh->mutex);
- break;
-
- case CATTA_BROWSER_REMOVE:
- if(pthread_mutex_lock(&mesh->mutex) != 0) {
- abort();
- }
-
- handle_network_change(mesh, --mesh->catta_interfaces);
- pthread_mutex_unlock(&mesh->mutex);
- break;
-
- case CATTA_BROWSER_ALL_FOR_NOW:
- case CATTA_BROWSER_CACHE_EXHAUSTED:
- break;
- }
-}
-
-static void discovery_log_cb(CattaLogLevel level, const char *txt) {
- meshlink_log_level_t mlevel = MESHLINK_CRITICAL;
-
- switch(level) {
- case CATTA_LOG_ERROR:
- mlevel = MESHLINK_ERROR;
- break;
-
- case CATTA_LOG_WARN:
- mlevel = MESHLINK_WARNING;
- break;
-
- case CATTA_LOG_NOTICE:
- case CATTA_LOG_INFO:
- mlevel = MESHLINK_INFO;
- break;
-
- case CATTA_LOG_DEBUG:
- default:
- mlevel = MESHLINK_DEBUG;
- break;
- }
-
- logger(NULL, mlevel, "%s\n", txt);
-}
-
-static void *discovery_loop(void *userdata) {
- bool status = false;
- meshlink_handle_t *mesh = userdata;
- assert(mesh);
-
- if(pthread_mutex_lock(&mesh->discovery_mutex) != 0) {
- abort();
- }
-
-#if 1
- // bypass Catta
- pthread_cond_broadcast(&mesh->discovery_cond);
- pthread_mutex_unlock(&mesh->discovery_mutex);
- return NULL;
-#endif
-
- // handle catta logs
- catta_set_log_function(discovery_log_cb);
-
- // create service type string
- char appname[strlen(mesh->appname) + 2];
- strcpy(appname, mesh->appname);
-
- for(char *p = appname; *p; p++) {
- if(!isalnum(*p) && *p != '_' && *p != '-') {
- *p = '_';
- }
- }
-
- if(!appname[1]) {
- appname[1] = '_';
- appname[2] = '\0';
- }
-
- size_t servicetype_strlen = sizeof(MESHLINK_MDNS_SERVICE_TYPE) + strlen(appname) + 1;
- mesh->catta_servicetype = malloc(servicetype_strlen);
-
- if(mesh->catta_servicetype == NULL) {
- logger(mesh, MESHLINK_ERROR, "Failed to allocate memory for service type string.\n");
- goto fail;
- }
-
- snprintf(mesh->catta_servicetype, servicetype_strlen, MESHLINK_MDNS_SERVICE_TYPE, appname);
-
- // Allocate discovery loop object
- if(!(mesh->catta_poll = catta_simple_poll_new())) {
- logger(mesh, MESHLINK_ERROR, "Failed to create discovery poll object.\n");
- goto fail;
- }
-
- // generate some unique host name (we actually do not care about it)
- char hostname[17];
- generate_rand_string(mesh, hostname, sizeof(hostname));
-
- // Let's set the host name for this server.
- CattaServerConfig config;
- catta_server_config_init(&config);
- config.host_name = catta_strdup(hostname);
- config.publish_workstation = 0;
- config.disallow_other_stacks = 0;
- config.publish_hinfo = 0;
- config.publish_addresses = 1;
- config.publish_no_reverse = 1;
- config.allow_point_to_point = 1;
-
- /* Allocate a new server */
- int error;
- const CattaPoll *poller = catta_simple_poll_get(mesh->catta_poll);
-
- if(!poller) {
- logger(mesh, MESHLINK_ERROR, "Failed to create discovery server: %s\n", catta_strerror(error));
- goto fail;
- }
-
- mesh->catta_server = catta_server_new(poller, &config, discovery_server_callback, mesh, &error);
-
- /* Free the configuration data */
- catta_server_config_free(&config);
-
- /* Check whether creating the server object succeeded */
- if(!mesh->catta_server) {
- logger(mesh, MESHLINK_ERROR, "Failed to create discovery server: %s\n", catta_strerror(error));
- goto fail;
- }
-
- // Create the service browser
- if(!(mesh->catta_browser = catta_s_service_browser_new(mesh->catta_server, CATTA_IF_UNSPEC, CATTA_PROTO_UNSPEC, mesh->catta_servicetype, NULL, 0, discovery_browse_callback, mesh))) {
- logger(mesh, MESHLINK_ERROR, "Failed to create discovery service browser: %s\n", catta_strerror(catta_server_errno(mesh->catta_server)));
- goto fail;
- }
-
- status = true;
-
-fail:
-
- pthread_cond_broadcast(&mesh->discovery_cond);
- pthread_mutex_unlock(&mesh->discovery_mutex);
-
- if(status) {
- catta_simple_poll_loop(mesh->catta_poll);
- }
-
- if(mesh->catta_browser) {
- catta_s_service_browser_free(mesh->catta_browser);
- mesh->catta_browser = NULL;
- }
-
- if(mesh->catta_group) {
- catta_s_entry_group_reset(mesh->catta_group);
- catta_s_entry_group_free(mesh->catta_group);
- mesh->catta_group = NULL;
- }
-
- if(mesh->catta_server) {
- catta_server_free(mesh->catta_server);
- mesh->catta_server = NULL;
- }
-
- if(mesh->catta_poll) {
- catta_simple_poll_free(mesh->catta_poll);
- mesh->catta_poll = NULL;
- }
-
- if(mesh->catta_servicetype) {
- free(mesh->catta_servicetype);
- mesh->catta_servicetype = NULL;
- }
-
- return NULL;
-}
-
typedef struct discovery_address {
int index;
bool up;
logger(mesh, MESHLINK_DEBUG, "discovery_start called\n");
assert(mesh);
- assert(!mesh->catta_poll);
- assert(!mesh->catta_server);
- assert(!mesh->catta_browser);
- assert(!mesh->discovery_threadstarted);
- assert(!mesh->catta_servicetype);
-
- if(pthread_mutex_lock(&mesh->discovery_mutex) != 0) {
- abort();
- }
-
- // Start the discovery thread
- if(pthread_create(&mesh->discovery_thread, NULL, discovery_loop, mesh) != 0) {
- pthread_mutex_unlock(&mesh->discovery_mutex);
- logger(mesh, MESHLINK_ERROR, "Could not start discovery thread: %s\n", strerror(errno));
- memset(&mesh->discovery_thread, 0, sizeof(mesh)->discovery_thread);
- return false;
- }
-
- pthread_cond_wait(&mesh->discovery_cond, &mesh->discovery_mutex);
- pthread_mutex_unlock(&mesh->discovery_mutex);
-
- mesh->discovery_threadstarted = true;
// Set up multicast sockets for mDNS
static const int one = 1;
io_del(&mesh->loop, &mesh->discovery_sockets[i]);
}
}
-
- // Shut down
- if(mesh->catta_poll) {
- catta_simple_poll_quit(mesh->catta_poll);
- }
-
- // Wait for the discovery thread to finish
- if(mesh->discovery_threadstarted == true) {
- if(pthread_join(mesh->discovery_thread, NULL) != 0) {
- abort();
- }
-
- mesh->discovery_threadstarted = false;
- }
-
- mesh->catta_interfaces = 0;
}
projects / meshlink / commitdiff