X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=avahi-core%2Fserver.c;h=dd0f707b6be3a957fc320cd4362358bf54d2a273;hb=22a61b042376903deada022e7585e0585aaa7d43;hp=316952b099119191394b61bd8746b8a1ae58774e;hpb=40cd1f60e9d84610401db992003a3b282de5fcae;p=catta diff --git a/avahi-core/server.c b/avahi-core/server.c index 316952b..dd0f707 100644 --- a/avahi-core/server.c +++ b/avahi-core/server.c @@ -33,7 +33,9 @@ #include "util.h" #include "iface.h" #include "socket.h" -#include "subscribe.h" +#include "resolve.h" + +#define AVAHI_HOST_RR_HOLDOFF_MSEC 1000 static void free_entry(AvahiServer*s, AvahiEntry *e) { AvahiEntry *t; @@ -100,6 +102,9 @@ static void cleanup_dead(AvahiServer *s) { s->need_entry_cleanup = FALSE; } + + if (s->need_browser_cleanup) + avahi_browser_cleanup(s); } static void enum_aux_records(AvahiServer *s, AvahiInterface *i, const gchar *name, guint16 type, void (*callback)(AvahiServer *s, AvahiRecord *r, gboolean flush_cache, gpointer userdata), gpointer userdata) { @@ -149,14 +154,14 @@ void avahi_server_prepare_response(AvahiServer *s, AvahiInterface *i, AvahiEntry void avahi_server_prepare_matching_responses(AvahiServer *s, AvahiInterface *i, AvahiKey *k, gboolean unicast_response) { AvahiEntry *e; - gchar *txt; +/* gchar *txt; */ g_assert(s); g_assert(i); g_assert(k); - g_message("Posting responses matching [%s]", txt = avahi_key_to_string(k)); - g_free(txt); +/* g_message("Posting responses matching [%s]", txt = avahi_key_to_string(k)); */ +/* g_free(txt); */ if (avahi_key_is_pattern(k)) { @@ -250,15 +255,13 @@ static void incoming_probe(AvahiServer *s, AvahiRecord *record, AvahiInterface * static gboolean handle_conflict(AvahiServer *s, AvahiInterface *i, AvahiRecord *record, gboolean unique, const AvahiAddress *a) { gboolean valid = TRUE, ours = FALSE, conflict = FALSE, withdraw_immediately = FALSE; AvahiEntry *e, *n, *conflicting_entry = NULL; - gchar *t; g_assert(s); g_assert(i); g_assert(record); - t = avahi_record_to_string(record); - g_message("CHECKING FOR CONFLICT: [%s]", t); +/* g_message("CHECKING FOR CONFLICT: [%s]", t); */ for (e = g_hash_table_lookup(s->entries_by_key, record->key); e; e = n) { n = e->by_key_next; @@ -275,10 +278,15 @@ static gboolean handle_conflict(AvahiServer *s, AvahiInterface *i, AvahiRecord * /* Check wheter there is a TTL conflict */ if (record->ttl <= e->record->ttl/2) { + gchar *t; /* Refresh */ + t = avahi_record_to_string(record); + g_message("Recieved record with bad TTL [%s]. Refreshing.", t); - avahi_interface_post_response(i, e->record, FALSE, NULL, TRUE); + avahi_server_prepare_matching_responses(s, i, e->record->key, FALSE); valid = FALSE; + + g_free(t); } /* There's no need to check the other entries of this RRset */ @@ -305,8 +313,12 @@ static gboolean handle_conflict(AvahiServer *s, AvahiInterface *i, AvahiRecord * /* g_message("ours=%i conflict=%i", ours, conflict); */ if (!ours && conflict) { + gchar *t; + valid = FALSE; + t = avahi_record_to_string(record); + if (withdraw_immediately) { g_message("Recieved conflicting record [%s] with local record to be. Withdrawing.", t); withdraw_rrset(s, record->key); @@ -318,9 +330,9 @@ static gboolean handle_conflict(AvahiServer *s, AvahiInterface *i, AvahiRecord * /* Local unique records are returned to probin * state. Local shared records are reannounced. */ } - } - g_free(t); + g_free(t); + } return valid; } @@ -378,11 +390,15 @@ void avahi_server_generate_response(AvahiServer *s, AvahiInterface *i, AvahiDnsP gboolean unicast_response, flush_cache, auxiliary; AvahiDnsPacket *reply = NULL; AvahiRecord *r; + + /* In case the query packet was truncated never respond + immediately, because known answer suppression records might be + contained in later packets */ + gboolean tc = p && !!(avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_FLAGS) & AVAHI_DNS_FLAG_TC); while ((r = avahi_record_list_next(s->record_list, &flush_cache, &unicast_response, &auxiliary))) { - - if (!avahi_interface_post_response(i, r, flush_cache, a, flush_cache && !auxiliary) && unicast_response) { + if (!avahi_interface_post_response(i, r, flush_cache, a, !tc && flush_cache && !auxiliary) && unicast_response) { append_aux_records_to_list(s, i, r, unicast_response); @@ -534,7 +550,7 @@ static void handle_response(AvahiServer *s, AvahiDnsPacket *p, AvahiInterface *i avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ARCOUNT); n > 0; n--) { AvahiRecord *record; gboolean cache_flush = FALSE; - gchar *txt; +/* gchar *txt; */ if (!(record = avahi_dns_packet_consume_record(p, &cache_flush))) { g_warning("Packet too short (4)"); @@ -543,8 +559,8 @@ static void handle_response(AvahiServer *s, AvahiDnsPacket *p, AvahiInterface *i if (record->key->type != AVAHI_DNS_TYPE_ANY) { - g_message("Handling response: %s", txt = avahi_record_to_string(record)); - g_free(txt); +/* g_message("Handling response: %s", txt = avahi_record_to_string(record)); */ +/* g_free(txt); */ if (handle_conflict(s, i, record, cache_flush, a)) { avahi_cache_update(i->cache, record, cache_flush, a); @@ -572,7 +588,7 @@ static void dispatch_packet(AvahiServer *s, AvahiDnsPacket *p, struct sockaddr * return; } - g_message("new packet recieved on interface '%s.%i'.", i->hardware->name, i->protocol); +/* g_message("new packet recieved on interface '%s.%i'.", i->hardware->name, i->protocol); */ if (sa->sa_family == AF_INET6) { static const guint8 ipv4_in_ipv6[] = { @@ -616,7 +632,7 @@ static void dispatch_packet(AvahiServer *s, AvahiDnsPacket *p, struct sockaddr * handle_query(s, p, i, &a, port, legacy_unicast); - g_message("Handled query"); +/* g_message("Handled query"); */ } else { if (port != AVAHI_MDNS_PORT) { @@ -638,7 +654,7 @@ static void dispatch_packet(AvahiServer *s, AvahiDnsPacket *p, struct sockaddr * } handle_response(s, p, i, &a); - g_message("Handled response"); +/* g_message("Handled response"); */ } } @@ -646,7 +662,7 @@ static void work(AvahiServer *s) { struct sockaddr_in6 sa6; struct sockaddr_in sa; AvahiDnsPacket *p; - gint iface = -1; + gint iface = 0; guint8 ttl; g_assert(s); @@ -697,24 +713,92 @@ static gboolean dispatch_func(GSource *source, GSourceFunc callback, gpointer us return TRUE; } -static void add_default_entries(AvahiServer *s) { - AvahiAddress a; +static void server_set_state(AvahiServer *s, AvahiServerState state) { + g_assert(s); + + if (s->state == state) + return; + s->state = state; + + if (s->callback) + s->callback(s, state, s->userdata); +} + +static void withdraw_host_rrs(AvahiServer *s) { g_assert(s); - if (s->config.register_hinfo) { - struct utsname utsname; - AvahiRecord *r; - - /* Fill in HINFO rr */ - r = avahi_record_new_full(s->host_name_fqdn, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_HINFO); - uname(&utsname); - r->data.hinfo.cpu = g_strdup(g_strup(utsname.machine)); - r->data.hinfo.os = g_strdup(g_strup(utsname.sysname)); - avahi_server_add(s, NULL, 0, AF_UNSPEC, AVAHI_ENTRY_UNIQUE, r); - avahi_record_unref(r); + if (s->hinfo_entry_group) { + avahi_entry_group_free(s->hinfo_entry_group); + s->hinfo_entry_group = NULL; + } + + if (s->browse_domain_entry_group) { + avahi_entry_group_free(s->browse_domain_entry_group); + s->browse_domain_entry_group = NULL; } + avahi_update_host_rrs(s->monitor, TRUE); + s->n_host_rr_pending = 0; +} + +void avahi_server_decrease_host_rr_pending(AvahiServer *s) { + g_assert(s); + + g_assert(s->n_host_rr_pending > 0); + + if (--s->n_host_rr_pending == 0) + server_set_state(s, AVAHI_SERVER_RUNNING); +} + +void avahi_server_increase_host_rr_pending(AvahiServer *s) { + g_assert(s); + + s->n_host_rr_pending ++; +} + +void avahi_host_rr_entry_group_callback(AvahiServer *s, AvahiEntryGroup *g, AvahiEntryGroupState state, void *userdata) { + g_assert(s); + g_assert(g); + + if (state == AVAHI_ENTRY_GROUP_REGISTERING && + s->state == AVAHI_SERVER_REGISTERING) + avahi_server_increase_host_rr_pending(s); + else if (state == AVAHI_ENTRY_GROUP_COLLISION && + (s->state == AVAHI_SERVER_REGISTERING || s->state == AVAHI_SERVER_RUNNING)) { + withdraw_host_rrs(s); + server_set_state(s, AVAHI_SERVER_COLLISION); + } else if (state == AVAHI_ENTRY_GROUP_ESTABLISHED && + s->state == AVAHI_SERVER_REGISTERING) + avahi_server_decrease_host_rr_pending(s); +} + +static void register_hinfo(AvahiServer *s) { + struct utsname utsname; + AvahiRecord *r; + + g_assert(s); + + if (!s->config.register_hinfo || s->hinfo_entry_group) + return; + + s->hinfo_entry_group = avahi_entry_group_new(s, avahi_host_rr_entry_group_callback, NULL); + + /* Fill in HINFO rr */ + r = avahi_record_new_full(s->host_name_fqdn, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_HINFO); + uname(&utsname); + r->data.hinfo.cpu = g_strdup(g_strup(utsname.machine)); + r->data.hinfo.os = g_strdup(g_strup(utsname.sysname)); + avahi_server_add(s, s->hinfo_entry_group, 0, AF_UNSPEC, AVAHI_ENTRY_UNIQUE, r); + avahi_record_unref(r); + + avahi_entry_group_commit(s->hinfo_entry_group); +} + +static void register_localhost(AvahiServer *s) { + AvahiAddress a; + g_assert(s); + /* Add localhost entries */ avahi_address_parse("127.0.0.1", AF_INET, &a); avahi_server_add_address(s, NULL, 0, AF_UNSPEC, AVAHI_ENTRY_NOPROBE|AVAHI_ENTRY_NOANNOUNCE, "localhost", &a); @@ -723,7 +807,96 @@ static void add_default_entries(AvahiServer *s) { avahi_server_add_address(s, NULL, 0, AF_UNSPEC, AVAHI_ENTRY_NOPROBE|AVAHI_ENTRY_NOANNOUNCE, "ip6-localhost", &a); } -AvahiServer *avahi_server_new(GMainContext *c, const AvahiServerConfig *sc) { +static void register_browse_domain(AvahiServer *s) { + g_assert(s); + + if (!s->config.announce_domain || s->browse_domain_entry_group) + return; + + s->browse_domain_entry_group = avahi_entry_group_new(s, NULL, NULL); + avahi_server_add_ptr(s, s->browse_domain_entry_group, 0, AF_UNSPEC, 0, "_browse._dns-sd._udp.local", s->domain_name); + avahi_entry_group_commit(s->browse_domain_entry_group); +} + +static void register_stuff(AvahiServer *s) { + g_assert(s); + + server_set_state(s, AVAHI_SERVER_REGISTERING); + register_hinfo(s); + register_browse_domain(s); + avahi_update_host_rrs(s->monitor, FALSE); + + if (s->n_host_rr_pending == 0) + server_set_state(s, AVAHI_SERVER_RUNNING); +} + +static void update_fqdn(AvahiServer *s) { + g_assert(s); + + g_assert(s->host_name); + g_assert(s->domain_name); + + g_free(s->host_name_fqdn); + s->host_name_fqdn = g_strdup_printf("%s.%s", s->host_name, s->domain_name); +} + +static void register_time_event_callback(AvahiTimeEvent *e, gpointer userdata) { + AvahiServer *s = userdata; + + g_assert(e); + g_assert(s); + + g_assert(e == s->register_time_event); + avahi_time_event_queue_remove(s->time_event_queue, s->register_time_event); + s->register_time_event = NULL; + + if (s->state == AVAHI_SERVER_SLEEPING) + register_stuff(s); +} + +static void delayed_register_stuff(AvahiServer *s) { + GTimeVal tv; + + g_assert(s); + + avahi_elapse_time(&tv, AVAHI_HOST_RR_HOLDOFF_MSEC, 0); + + if (s->register_time_event) + avahi_time_event_queue_update(s->time_event_queue, s->register_time_event, &tv); + else + s->register_time_event = avahi_time_event_queue_add(s->time_event_queue, &tv, register_time_event_callback, s); +} + +void avahi_server_set_host_name(AvahiServer *s, const gchar *host_name) { + g_assert(s); + g_assert(host_name); + + server_set_state(s, AVAHI_SERVER_SLEEPING); + withdraw_host_rrs(s); + + g_free(s->host_name); + s->host_name = host_name ? avahi_normalize_name(host_name) : avahi_get_host_name(); + s->host_name[strcspn(s->host_name, ".")] = 0; + update_fqdn(s); + + delayed_register_stuff(s); +} + +void avahi_server_set_domain_name(AvahiServer *s, const gchar *domain_name) { + g_assert(s); + g_assert(domain_name); + + server_set_state(s, AVAHI_SERVER_SLEEPING); + withdraw_host_rrs(s); + + g_free(s->domain_name); + s->domain_name = domain_name ? avahi_normalize_name(domain_name) : g_strdup("local."); + update_fqdn(s); + + delayed_register_stuff(s); +} + +AvahiServer *avahi_server_new(GMainContext *c, const AvahiServerConfig *sc, AvahiServerCallback callback, gpointer userdata) { AvahiServer *s; static GSourceFuncs source_funcs = { @@ -736,8 +909,8 @@ AvahiServer *avahi_server_new(GMainContext *c, const AvahiServerConfig *sc) { }; s = g_new(AvahiServer, 1); - - s->need_entry_cleanup = s->need_group_cleanup = FALSE; + s->n_host_rr_pending = 0; + s->need_entry_cleanup = s->need_group_cleanup = s->need_browser_cleanup = FALSE; if (sc) avahi_server_config_copy(&s->config, sc); @@ -763,30 +936,7 @@ AvahiServer *avahi_server_new(GMainContext *c, const AvahiServerConfig *sc) { g_main_context_ref(s->context = c); else s->context = g_main_context_default(); - - AVAHI_LLIST_HEAD_INIT(AvahiEntry, s->entries); - s->entries_by_key = g_hash_table_new((GHashFunc) avahi_key_hash, (GEqualFunc) avahi_key_equal); - AVAHI_LLIST_HEAD_INIT(AvahiGroup, s->groups); - - AVAHI_LLIST_HEAD_INIT(AvahiSubscription, s->subscriptions); - s->subscription_hashtable = g_hash_table_new((GHashFunc) avahi_key_hash, (GEqualFunc) avahi_key_equal); - /* Get host name */ - s->host_name = avahi_get_host_name(); - s->host_name[strcspn(s->host_name, ".")] = 0; - - s->domain = avahi_normalize_name("local."); - - s->host_name_fqdn = g_strdup_printf("%s.%s", s->host_name, s->domain); - - s->record_list = avahi_record_list_new(); - - s->time_event_queue = avahi_time_event_queue_new(s->context, G_PRIORITY_DEFAULT+10); /* Slightly less priority than the FDs */ - s->monitor = avahi_interface_monitor_new(s); - avahi_interface_monitor_sync(s->monitor); - - add_default_entries(s); - /* Prepare IO source registration */ s->source = g_source_new(&source_funcs, sizeof(GSource) + sizeof(AvahiServer*)); *((AvahiServer**) (((guint8*) s->source) + sizeof(GSource))) = s; @@ -802,7 +952,43 @@ AvahiServer *avahi_server_new(GMainContext *c, const AvahiServerConfig *sc) { g_source_add_poll(s->source, &s->pollfd_ipv6); g_source_attach(s->source, s->context); + + s->callback = callback; + s->userdata = userdata; + + AVAHI_LLIST_HEAD_INIT(AvahiEntry, s->entries); + s->entries_by_key = g_hash_table_new((GHashFunc) avahi_key_hash, (GEqualFunc) avahi_key_equal); + AVAHI_LLIST_HEAD_INIT(AvahiGroup, s->groups); + + AVAHI_LLIST_HEAD_INIT(AvahiRecordBrowser, s->record_browsers); + s->record_browser_hashtable = g_hash_table_new((GHashFunc) avahi_key_hash, (GEqualFunc) avahi_key_equal); + AVAHI_LLIST_HEAD_INIT(AvahiHostNameResolver, s->host_name_resolvers); + AVAHI_LLIST_HEAD_INIT(AvahiAddressResolver, s->address_resolvers); + AVAHI_LLIST_HEAD_INIT(AvahiDomainBrowser, s->domain_browsers); + + /* Get host name */ + s->host_name = s->config.host_name ? avahi_normalize_name(s->config.host_name) : avahi_get_host_name(); + s->host_name[strcspn(s->host_name, ".")] = 0; + s->domain_name = s->config.domain_name ? avahi_normalize_name(s->config.domain_name) : g_strdup("local."); + s->host_name_fqdn = NULL; + update_fqdn(s); + + s->record_list = avahi_record_list_new(); + s->time_event_queue = avahi_time_event_queue_new(s->context, G_PRIORITY_DEFAULT+10); /* Slightly less priority than the FDs */ + s->register_time_event = NULL; + + s->state = AVAHI_SERVER_INVALID; + + s->monitor = avahi_interface_monitor_new(s); + avahi_interface_monitor_sync(s->monitor); + + register_localhost(s); + + s->hinfo_entry_group = NULL; + s->browse_domain_entry_group = NULL; + register_stuff(s); + return s; } @@ -817,12 +1003,20 @@ void avahi_server_free(AvahiServer* s) { while (s->groups) free_group(s, s->groups); - while (s->subscriptions) - avahi_subscription_free(s->subscriptions); - g_hash_table_destroy(s->subscription_hashtable); + while (s->host_name_resolvers) + avahi_host_name_resolver_free(s->host_name_resolvers); + while (s->address_resolvers) + avahi_address_resolver_free(s->address_resolvers); + while (s->domain_browsers) + avahi_domain_browser_free(s->domain_browsers); + while (s->record_browsers) + avahi_record_browser_destroy(s->record_browsers); + g_hash_table_destroy(s->record_browser_hashtable); g_hash_table_destroy(s->entries_by_key); + if (s->register_time_event) + avahi_time_event_queue_remove(s->time_event_queue, s->register_time_event); avahi_time_event_queue_free(s->time_event_queue); avahi_record_list_free(s->record_list); @@ -833,7 +1027,7 @@ void avahi_server_free(AvahiServer* s) { close(s->fd_ipv6); g_free(s->host_name); - g_free(s->domain); + g_free(s->domain_name); g_free(s->host_name_fqdn); g_source_destroy(s->source); @@ -1087,7 +1281,7 @@ void avahi_server_add_service_strlst( while (domain[0] == '.') domain++; } else - domain = "local"; + domain = s->domain_name; if (!host) host = s->host_name_fqdn; @@ -1175,7 +1369,7 @@ void avahi_entry_group_change_state(AvahiEntryGroup *g, AvahiEntryGroupState sta if (g->state == state) return; - + g->state = state; if (g->callback) { @@ -1203,11 +1397,20 @@ AvahiEntryGroup *avahi_entry_group_new(AvahiServer *s, AvahiEntryGroupCallback c } void avahi_entry_group_free(AvahiEntryGroup *g) { + AvahiEntry *e; + g_assert(g); g_assert(g->server); + for (e = g->entries; e; e = e->by_group_next) { + avahi_goodbye_entry(g->server, e, TRUE); + e->dead = TRUE; + } + g->dead = TRUE; + g->server->need_group_cleanup = TRUE; + g->server->need_entry_cleanup = TRUE; } void avahi_entry_group_commit(AvahiEntryGroup *g) { @@ -1238,18 +1441,54 @@ AvahiEntryGroupState avahi_entry_group_get_state(AvahiEntryGroup *g) { return g->state; } -const gchar* avahi_server_get_domain(AvahiServer *s) { +void avahi_entry_group_set_data(AvahiEntryGroup *g, gpointer userdata) { + g_assert(g); + + g->userdata = userdata; +} + +gpointer avahi_entry_group_get_data(AvahiEntryGroup *g) { + g_assert(g); + + return g->userdata; +} + +const gchar* avahi_server_get_domain_name(AvahiServer *s) { g_assert(s); - return s->domain; + return s->domain_name; } const gchar* avahi_server_get_host_name(AvahiServer *s) { g_assert(s); + return s->host_name; +} + +const gchar* avahi_server_get_host_name_fqdn(AvahiServer *s) { + g_assert(s); + return s->host_name_fqdn; } +gpointer avahi_server_get_data(AvahiServer *s) { + g_assert(s); + + return s->userdata; +} + +void avahi_server_set_data(AvahiServer *s, gpointer userdata) { + g_assert(s); + + s->userdata = userdata; +} + +AvahiServerState avahi_server_get_state(AvahiServer *s) { + g_assert(s); + + return s->state; +} + AvahiServerConfig* avahi_server_config_init(AvahiServerConfig *c) { g_assert(c); @@ -1261,16 +1500,17 @@ AvahiServerConfig* avahi_server_config_init(AvahiServerConfig *c) { c->host_name = NULL; c->domain_name = NULL; c->check_response_ttl = TRUE; - + c->announce_domain = TRUE; + c->use_iff_running = FALSE; + return c; } void avahi_server_config_free(AvahiServerConfig *c) { g_assert(c); - g_assert(c->host_name); - g_assert(c->domain_name); - g_free(c); + g_free(c->host_name); + g_free(c->domain_name); } AvahiServerConfig* avahi_server_config_copy(AvahiServerConfig *ret, const AvahiServerConfig *c) {