From: Guus Sliepen Date: Mon, 17 Dec 2018 02:14:45 +0000 (+0100) Subject: Reduce locking in Catta callback functions to a minimum. X-Git-Url: https://git.meshlink.io/?a=commitdiff_plain;h=92fcf64776730c1788717ac0d5405f0948892cb9;p=meshlink Reduce locking in Catta callback functions to a minimum. --- diff --git a/src/discovery.c b/src/discovery.c index c74c71c2..e7ac94ee 100644 --- a/src/discovery.c +++ b/src/discovery.c @@ -140,17 +140,16 @@ static void discovery_server_callback(CattaServer *server, CattaServerState stat // asserts assert(mesh != NULL); - pthread_mutex_lock(&(mesh->mesh_mutex)); - switch(state) { - case CATTA_SERVER_RUNNING: { + 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(!mesh->catta_group) { discovery_create_services(mesh); } - } - break; + + break; case CATTA_SERVER_COLLISION: { // asserts @@ -160,18 +159,16 @@ static void discovery_server_callback(CattaServer *server, CattaServerState stat /* A host name collision happened. Let's pick a new name for the server */ char hostname[17]; generate_rand_string(hostname, sizeof(hostname)); - - logger(mesh, MESHLINK_WARNING, "Catta host name collision, retrying with '%s'\n", hostname); int result = catta_server_set_host_name(mesh->catta_server, hostname); if(result < 0) { - logger(mesh, MESHLINK_ERROR, "Catta failed to set new host name: %s\n", catta_strerror(result)); catta_simple_poll_quit(mesh->catta_poll); } } break; - case CATTA_SERVER_REGISTERING: { + case CATTA_SERVER_REGISTERING: + /* 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. */ @@ -179,30 +176,27 @@ static void discovery_server_callback(CattaServer *server, CattaServerState stat catta_s_entry_group_reset(mesh->catta_group); mesh->catta_group = NULL; } - } - break; - case CATTA_SERVER_FAILURE: { + break; + + case CATTA_SERVER_FAILURE: // asserts assert(mesh->catta_server != NULL); assert(mesh->catta_poll != NULL); /* Terminate on failure */ - logger(mesh, MESHLINK_ERROR, "Catta server failure: %s\n", catta_strerror(catta_server_errno(mesh->catta_server))); catta_simple_poll_quit(mesh->catta_poll); - } - break; + break; case CATTA_SERVER_INVALID: break; } - - pthread_mutex_unlock(&(mesh->mesh_mutex)); } 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; meshlink_handle_t *mesh = userdata; // asserts @@ -210,19 +204,14 @@ static void discovery_resolve_callback(CattaSServiceResolver *resolver, CattaIfI assert(mesh != NULL); assert(mesh->catta_server != NULL); - pthread_mutex_lock(&(mesh->mesh_mutex)); - /* Called whenever a service has been resolved successfully or timed out */ switch(event) { - case CATTA_RESOLVER_FAILURE: { + case CATTA_RESOLVER_FAILURE: // asserts assert(name != NULL); assert(type != NULL); assert(domain != NULL); - - logger(mesh, MESHLINK_WARNING, "(Resolver) Failed to resolve service '%s' of type '%s' in domain '%s': %s\n", name, type, domain, catta_strerror(catta_server_errno(mesh->catta_server))); - } - break; + break; case CATTA_RESOLVER_FOUND: { // asserts @@ -233,29 +222,6 @@ static void discovery_resolve_callback(CattaSServiceResolver *resolver, CattaIfI assert(address != NULL); assert(txt != NULL); - char straddr[CATTA_ADDRESS_STR_MAX], *strtxt; - - logger(mesh, MESHLINK_DEBUG, "(Resolver) Service '%s' of type '%s' in domain '%s':\n", name, type, domain); - - catta_address_snprint(straddr, sizeof(straddr), address); - strtxt = catta_string_list_to_string(txt); - logger(mesh, MESHLINK_DEBUG, - "\t%s:%u (%s)\n" - "\tTXT=%s\n" - "\tcookie is %u\n" - "\tis_local: %i\n" - "\twide_area: %i\n" - "\tmulticast: %i\n" - "\tcached: %i\n", - host_name, port, straddr, - strtxt, - catta_string_list_get_service_cookie(txt), - !!(flags & CATTA_LOOKUP_RESULT_LOCAL), - !!(flags & CATTA_LOOKUP_RESULT_WIDE_AREA), - !!(flags & CATTA_LOOKUP_RESULT_MULTICAST), - !!(flags & CATTA_LOOKUP_RESULT_CACHED)); - catta_free(strtxt); - // 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); @@ -265,6 +231,8 @@ static void discovery_resolve_callback(CattaSServiceResolver *resolver, CattaIfI char *node_fp = (char *)catta_string_list_get_text(node_fp_li) + strlen(MESHLINK_MDNS_FINGERPRINT_KEY); if(node_name[0] == '=' && node_fp[0] == '=') { + pthread_mutex_lock(&(mesh->mesh_mutex)); + node_name += 1; node_fp += 1; @@ -304,19 +272,15 @@ static void discovery_resolve_callback(CattaSServiceResolver *resolver, CattaIfI } else { logger(mesh, MESHLINK_WARNING, "Node %s is not part of the mesh network.\n", node_name); } - } else { - logger(mesh, MESHLINK_WARNING, "TXT records invalid.\n"); + + pthread_mutex_unlock(&(mesh->mesh_mutex)); } - } else { - logger(mesh, MESHLINK_WARNING, "TXT records missing.\n"); } } break; } catta_s_service_resolver_free(resolver); - - pthread_mutex_unlock(&(mesh->mesh_mutex)); } 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) { @@ -329,52 +293,21 @@ static void discovery_browse_callback(CattaSServiceBrowser *browser, CattaIfInde assert(mesh->catta_server != NULL); assert(mesh->catta_poll != NULL); - pthread_mutex_lock(&(mesh->mesh_mutex)); - /* Called whenever a new services becomes available on the LAN or is removed from the LAN */ switch(event) { - case CATTA_BROWSER_FAILURE: { - logger(mesh, MESHLINK_ERROR, "(Browser) %s\n", catta_strerror(catta_server_errno(mesh->catta_server))); + case CATTA_BROWSER_FAILURE: catta_simple_poll_quit(mesh->catta_poll); - } - break; - - case CATTA_BROWSER_NEW: { - // asserts - assert(name != NULL); - assert(type != NULL); - assert(domain != NULL); - - logger(mesh, MESHLINK_DEBUG, "(Browser) NEW: service '%s' of type '%s' in domain '%s'\n", name, type, domain); - - /* We ignore the returned resolver object. In the callback - function we free it. Ifthe server is terminated before - the callback function is called the server will free - the resolver for us. */ - if(!(catta_s_service_resolver_new(mesh->catta_server, interface_, protocol, name, type, domain, CATTA_PROTO_UNSPEC, 0, discovery_resolve_callback, mesh))) { - logger(mesh, MESHLINK_DEBUG, "Failed to resolve service '%s': %s\n", name, catta_strerror(catta_server_errno(mesh->catta_server))); - } - } - break; - - case CATTA_BROWSER_REMOVE: { - // asserts - assert(name != NULL); - assert(type != NULL); - assert(domain != NULL); + break; - logger(mesh, MESHLINK_DEBUG, "(Browser) REMOVE: service '%s' of type '%s' in domain '%s'\n", name, type, domain); - } - break; + case CATTA_BROWSER_NEW: + catta_s_service_resolver_new(mesh->catta_server, interface_, protocol, name, type, domain, CATTA_PROTO_UNSPEC, 0, discovery_resolve_callback, mesh); + break; + case CATTA_BROWSER_REMOVE: case CATTA_BROWSER_ALL_FOR_NOW: - case CATTA_BROWSER_CACHE_EXHAUSTED: { - logger(mesh, MESHLINK_DEBUG, "(Browser) %s\n", event == CATTA_BROWSER_CACHE_EXHAUSTED ? "CACHE_EXHAUSTED" : "ALL_FOR_NOW"); - } - break; + case CATTA_BROWSER_CACHE_EXHAUSTED: + break; } - - pthread_mutex_unlock(&(mesh->mesh_mutex)); } static void *discovery_loop(void *userdata) {