From a6442df016687a958b0871c5dc1dccedafafd6b4 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Mon, 17 Oct 2005 19:28:54 +0000 Subject: [PATCH] split entry and entry-group management stuff off to its own file entry.c git-svn-id: file:///home/lennart/svn/public/avahi/trunk@796 941a03a8-eaeb-0310-b9a0-b1bbd8fe43fe --- avahi-core/Makefile.am | 2 +- avahi-core/entry.c | 1201 ++++++++++++++++++++++++++++++++++++++++ avahi-core/server.c | 1187 +-------------------------------------- avahi-core/server.h | 9 +- 4 files changed, 1218 insertions(+), 1181 deletions(-) create mode 100644 avahi-core/entry.c diff --git a/avahi-core/Makefile.am b/avahi-core/Makefile.am index b62a4d5..1a78368 100644 --- a/avahi-core/Makefile.am +++ b/avahi-core/Makefile.am @@ -48,7 +48,7 @@ noinst_PROGRAMS = \ libavahi_core_la_SOURCES = \ timeeventq.c timeeventq.h\ iface.c iface.h \ - server.c server.h \ + server.c server.h entry.c \ prioq.c prioq.h \ cache.c cache.h \ socket.c socket.h \ diff --git a/avahi-core/entry.c b/avahi-core/entry.c new file mode 100644 index 0000000..be215dd --- /dev/null +++ b/avahi-core/entry.c @@ -0,0 +1,1201 @@ +/* $Id$ */ + +/*** + This file is part of avahi. + + avahi is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + avahi is distributed in the hope that it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General + Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with avahi; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +#ifdef HAVE_CONFIG_H +#include +#endif + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include "server.h" +#include "iface.h" +#include "socket.h" +#include "browse.h" +#include "log.h" +#include "util.h" + +void avahi_entry_free(AvahiServer*s, AvahiEntry *e) { + AvahiEntry *t; + + assert(s); + assert(e); + + avahi_goodbye_entry(s, e, 1, 1); + + /* Remove from linked list */ + AVAHI_LLIST_REMOVE(AvahiEntry, entries, s->entries, e); + + /* Remove from hash table indexed by name */ + t = avahi_hashmap_lookup(s->entries_by_key, e->record->key); + AVAHI_LLIST_REMOVE(AvahiEntry, by_key, t, e); + if (t) + avahi_hashmap_replace(s->entries_by_key, t->record->key, t); + else + avahi_hashmap_remove(s->entries_by_key, e->record->key); + + /* Remove from associated group */ + if (e->group) + AVAHI_LLIST_REMOVE(AvahiEntry, by_group, e->group->entries, e); + + avahi_record_unref(e->record); + avahi_free(e); +} + +void avahi_entry_group_free(AvahiServer *s, AvahiSEntryGroup *g) { + assert(s); + assert(g); + + while (g->entries) + avahi_entry_free(s, g->entries); + + if (g->register_time_event) + avahi_time_event_free(g->register_time_event); + + AVAHI_LLIST_REMOVE(AvahiSEntryGroup, groups, s->groups, g); + avahi_free(g); +} + +void avahi_cleanup_dead_entries(AvahiServer *s) { + assert(s); + + if (s->need_group_cleanup) { + AvahiSEntryGroup *g, *next; + + for (g = s->groups; g; g = next) { + next = g->groups_next; + + if (g->dead) + avahi_entry_group_free(s, g); + } + + s->need_group_cleanup = 0; + } + + if (s->need_entry_cleanup) { + AvahiEntry *e, *next; + + for (e = s->entries; e; e = next) { + next = e->entries_next; + + if (e->dead) + avahi_entry_free(s, e); + } + + s->need_entry_cleanup = 0; + } + + if (s->need_browser_cleanup) + avahi_browser_cleanup(s); +} + +static int check_record_conflict(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, AvahiRecord *r, AvahiPublishFlags flags) { + AvahiEntry *e; + + assert(s); + assert(r); + + for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) { + if (e->dead) + continue; + + if (!(flags & AVAHI_PUBLISH_UNIQUE) && !(e->flags & AVAHI_PUBLISH_UNIQUE)) + continue; + + if ((flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) && (e->flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) ) + continue; + + if ((interface <= 0 || + e->interface <= 0 || + e->interface == interface) && + (protocol == AVAHI_PROTO_UNSPEC || + e->protocol == AVAHI_PROTO_UNSPEC || + e->protocol == protocol)) + + return -1; + } + + return 0; +} + +int avahi_server_add( + AvahiServer *s, + AvahiSEntryGroup *g, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiPublishFlags flags, + AvahiRecord *r) { + + assert(s); + assert(r); + + if (!AVAHI_IF_VALID(interface)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE); + + if (!AVAHI_PROTO_VALID(protocol)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL); + + if (!AVAHI_FLAGS_VALID( + flags, + AVAHI_PUBLISH_NO_ANNOUNCE| + AVAHI_PUBLISH_NO_PROBE| + AVAHI_PUBLISH_UNIQUE| + AVAHI_PUBLISH_ALLOW_MULTIPLE| + AVAHI_PUBLISH_IS_PROXY| + AVAHI_PUBLISH_UPDATE)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS); + + if (!avahi_is_valid_domain_name(r->key->name)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_HOST_NAME); + + if (r->ttl == 0) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_TTL); + + if (avahi_key_is_pattern(r->key)) + return avahi_server_set_errno(s, AVAHI_ERR_IS_PATTERN); + + if (!avahi_record_is_valid(r)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_RECORD); + + if (flags & AVAHI_PUBLISH_UPDATE) { + AvahiEntry *e; + AvahiRecord *old_record; + int is_first = 1; + + /* Update and existing record */ + + /* Find the first matching entry */ + for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) { + if (!e->dead && e->group == g && e->interface == interface && e->protocol == protocol) + break; + + is_first = 0; + } + + /* Hmm, nothing found? */ + if (!e) + return avahi_server_set_errno(s, AVAHI_ERR_NOT_FOUND); + + /* Update the entry */ + old_record = e->record; + e->record = avahi_record_ref(r); + e->flags = flags; + + /* Announce our changes when needed */ + if (!avahi_record_equal_no_ttl(old_record, r) && (!g || g->state != AVAHI_ENTRY_GROUP_UNCOMMITED)) { + + /* Remove the old entry from all caches, if needed */ + if (!(e->flags & AVAHI_PUBLISH_UNIQUE)) + avahi_goodbye_entry(s, e, 1, 0); + + /* Reannounce our updated entry */ + avahi_reannounce_entry(s, e); + } + + /* If we were the first entry in the list, we need to update the key */ + if (is_first) + avahi_hashmap_replace(s->entries_by_key, e->record->key, e); + + avahi_record_unref(old_record); + + } else { + AvahiEntry *e, *t; + + /* Add a new record */ + + if (check_record_conflict(s, interface, protocol, r, flags) < 0) + return avahi_server_set_errno(s, AVAHI_ERR_LOCAL_COLLISION); + + if (!(e = avahi_new(AvahiEntry, 1))) + return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); + + e->server = s; + e->record = avahi_record_ref(r); + e->group = g; + e->interface = interface; + e->protocol = protocol; + e->flags = flags; + e->dead = 0; + + AVAHI_LLIST_HEAD_INIT(AvahiAnnouncer, e->announcers); + + AVAHI_LLIST_PREPEND(AvahiEntry, entries, s->entries, e); + + /* Insert into hash table indexed by name */ + t = avahi_hashmap_lookup(s->entries_by_key, e->record->key); + AVAHI_LLIST_PREPEND(AvahiEntry, by_key, t, e); + avahi_hashmap_replace(s->entries_by_key, e->record->key, t); + + /* Insert into group list */ + if (g) + AVAHI_LLIST_PREPEND(AvahiEntry, by_group, g->entries, e); + + avahi_announce_entry(s, e); + } + + return AVAHI_OK; +} + +const AvahiRecord *avahi_server_iterate(AvahiServer *s, AvahiSEntryGroup *g, void **state) { + AvahiEntry **e = (AvahiEntry**) state; + assert(s); + assert(e); + + if (!*e) + *e = g ? g->entries : s->entries; + + while (*e && (*e)->dead) + *e = g ? (*e)->by_group_next : (*e)->entries_next; + + if (!*e) + return NULL; + + return avahi_record_ref((*e)->record); +} + +int avahi_server_dump(AvahiServer *s, AvahiDumpCallback callback, void* userdata) { + AvahiEntry *e; + + assert(s); + assert(callback); + + callback(";;; ZONE DUMP FOLLOWS ;;;", userdata); + + for (e = s->entries; e; e = e->entries_next) { + char *t; + char ln[256]; + + if (e->dead) + continue; + + if (!(t = avahi_record_to_string(e->record))) + return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); + + snprintf(ln, sizeof(ln), "%s ; iface=%i proto=%i", t, e->interface, e->protocol); + avahi_free(t); + + callback(ln, userdata); + } + + avahi_dump_caches(s->monitor, callback, userdata); + + if (s->wide_area_lookup_engine) + avahi_wide_area_cache_dump(s->wide_area_lookup_engine, callback, userdata); + return AVAHI_OK; +} + +int avahi_server_add_ptr( + AvahiServer *s, + AvahiSEntryGroup *g, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiPublishFlags flags, + uint32_t ttl, + const char *name, + const char *dest) { + + AvahiRecord *r; + int ret; + + assert(s); + assert(dest); + + if ((name && !avahi_is_valid_domain_name(name)) || !avahi_is_valid_domain_name(dest)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_HOST_NAME); + + if (!name) + name = s->host_name_fqdn; + + if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR, ttl))) + return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); + + r->data.ptr.name = avahi_normalize_name_strdup(dest); + ret = avahi_server_add(s, g, interface, protocol, flags, r); + avahi_record_unref(r); + return ret; +} + +int avahi_server_add_address( + AvahiServer *s, + AvahiSEntryGroup *g, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiPublishFlags flags, + const char *name, + AvahiAddress *a) { + + char *n = NULL; + int ret = AVAHI_OK; + + assert(s); + assert(a); + + if (!AVAHI_IF_VALID(interface)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE); + + if (!AVAHI_PROTO_VALID(protocol) || !AVAHI_PROTO_VALID(a->proto)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL); + + if (!AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_NO_REVERSE|AVAHI_PUBLISH_NO_ANNOUNCE|AVAHI_PUBLISH_NO_PROBE|AVAHI_PUBLISH_UPDATE)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS); + + if (name && !avahi_is_valid_domain_name(name)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_HOST_NAME); + + if (!name) + name = s->host_name_fqdn; + else { + if (!(n = avahi_normalize_name_strdup(name))) + return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); + + name = n; + } + + if (a->proto == AVAHI_PROTO_INET) { + AvahiRecord *r; + + if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME))) { + ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); + goto fail; + } + + r->data.a.address = a->data.ipv4; + ret = avahi_server_add(s, g, interface, protocol, (flags & ~ AVAHI_PUBLISH_NO_REVERSE) | AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r); + avahi_record_unref(r); + + if (ret < 0) + goto fail; + + if (!(flags & AVAHI_PUBLISH_NO_REVERSE)) { + char *reverse; + + if (!(reverse = avahi_reverse_lookup_name_ipv4(&a->data.ipv4))) { + ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); + goto fail; + } + + ret = avahi_server_add_ptr(s, g, interface, protocol, flags | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL_HOST_NAME, reverse, name); + avahi_free(reverse); + } + + } else { + AvahiRecord *r; + + assert(a->proto == AVAHI_PROTO_INET6); + + if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME))) { + ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); + goto fail; + } + + r->data.aaaa.address = a->data.ipv6; + ret = avahi_server_add(s, g, interface, protocol, (flags & ~ AVAHI_PUBLISH_NO_REVERSE) | AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r); + avahi_record_unref(r); + + if (ret < 0) + goto fail; + + if (!(flags & AVAHI_PUBLISH_NO_REVERSE)) { + char *reverse; + + if (!(reverse = avahi_reverse_lookup_name_ipv6_arpa(&a->data.ipv6))) { + ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); + goto fail; + } + + ret = avahi_server_add_ptr(s, g, interface, protocol, flags | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL_HOST_NAME, reverse, name); + avahi_free(reverse); + + if (ret < 0) + goto fail; + + if (!(reverse = avahi_reverse_lookup_name_ipv6_int(&a->data.ipv6))) { + ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); + goto fail; + } + + ret = avahi_server_add_ptr(s, g, interface, protocol, flags | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL_HOST_NAME, reverse, name); + avahi_free(reverse); + } + } + +fail: + + avahi_free(n); + + return ret; +} + +static int server_add_txt_strlst_nocopy( + AvahiServer *s, + AvahiSEntryGroup *g, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiPublishFlags flags, + uint32_t ttl, + const char *name, + AvahiStringList *strlst) { + + AvahiRecord *r; + int ret; + + assert(s); + + if (!(r = avahi_record_new_full(name ? name : s->host_name_fqdn, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_TXT, ttl))) { + avahi_string_list_free(strlst); + return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); + } + + r->data.txt.string_list = strlst; + ret = avahi_server_add(s, g, interface, protocol, flags, r); + avahi_record_unref(r); + + return ret; +} + +int avahi_server_add_txt_strlst( + AvahiServer *s, + AvahiSEntryGroup *g, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiPublishFlags flags, + uint32_t ttl, + const char *name, + AvahiStringList *strlst) { + + assert(s); + + return server_add_txt_strlst_nocopy(s, g, interface, protocol, flags, ttl, name, avahi_string_list_copy(strlst)); +} + +int avahi_server_add_txt_va( + AvahiServer *s, + AvahiSEntryGroup *g, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiPublishFlags flags, + uint32_t ttl, + const char *name, + va_list va) { + + assert(s); + + return server_add_txt_strlst_nocopy(s, g, interface, protocol, flags, ttl, name, avahi_string_list_new_va(va)); +} + +int avahi_server_add_txt( + AvahiServer *s, + AvahiSEntryGroup *g, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiPublishFlags flags, + uint32_t ttl, + const char *name, + ...) { + + va_list va; + int ret; + + assert(s); + + va_start(va, name); + ret = avahi_server_add_txt_va(s, g, interface, protocol, flags, ttl, name, va); + va_end(va); + + return ret; +} + +static AvahiStringList *add_magic_cookie( + AvahiServer *s, + AvahiStringList *strlst) { + + assert(s); + + if (!s->config.add_service_cookie) + return strlst; + + if (avahi_string_list_find(strlst, AVAHI_SERVICE_COOKIE)) + /* This string list already contains a magic cookie */ + return strlst; + + return avahi_string_list_add_printf(strlst, AVAHI_SERVICE_COOKIE"=%u", s->local_service_cookie); +} + +static int server_add_service_strlst_nocopy( + AvahiServer *s, + AvahiSEntryGroup *g, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiPublishFlags flags, + const char *name, + const char *type, + const char *domain, + const char *host, + uint16_t port, + AvahiStringList *strlst) { + + char ptr_name[AVAHI_DOMAIN_NAME_MAX], svc_name[AVAHI_DOMAIN_NAME_MAX], enum_ptr[AVAHI_DOMAIN_NAME_MAX], *h = NULL; + AvahiRecord *r = NULL; + int ret = AVAHI_OK; + + assert(s); + assert(type); + assert(name); + + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE); + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL); + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_NO_COOKIE|AVAHI_PUBLISH_IS_PROXY|AVAHI_PUBLISH_UPDATE), AVAHI_ERR_INVALID_FLAGS); + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME); + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE); + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME); + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !host || avahi_is_valid_domain_name(host), AVAHI_ERR_INVALID_HOST_NAME); + + if (!domain) + domain = s->domain_name; + + if (!host) + host = s->host_name_fqdn; + + if (!(h = avahi_normalize_name_strdup(host))) { + ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); + goto fail; + } + + if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 || + (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, type, domain)) < 0 || + (ret = avahi_service_name_join(enum_ptr, sizeof(enum_ptr), NULL, "_services._dns-sd._udp", domain)) < 0) { + avahi_server_set_errno(s, ret); + goto fail; + } + + /* Add service enumeration PTR record */ + + if ((ret = avahi_server_add_ptr(s, g, interface, protocol, flags & AVAHI_PUBLISH_IS_PROXY, AVAHI_DEFAULT_TTL, ptr_name, svc_name)) < 0) + goto fail; + + /* Add SRV record */ + + if (!(r = avahi_record_new_full(svc_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) { + ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); + goto fail; + } + + r->data.srv.priority = 0; + r->data.srv.weight = 0; + r->data.srv.port = port; + r->data.srv.name = h; + h = NULL; + ret = avahi_server_add(s, g, interface, protocol, (flags & AVAHI_PUBLISH_IS_PROXY) | AVAHI_PUBLISH_UNIQUE, r); + avahi_record_unref(r); + + if (ret < 0) + goto fail; + + /* Add TXT record */ + + if (!(flags & AVAHI_PUBLISH_NO_COOKIE)) + strlst = add_magic_cookie(s, strlst); + + ret = server_add_txt_strlst_nocopy(s, g, interface, protocol, (flags & AVAHI_PUBLISH_IS_PROXY) | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL, svc_name, strlst); + strlst = NULL; + + if (ret < 0) + goto fail; + + /* Add service type enumeration record */ + + ret = avahi_server_add_ptr(s, g, interface, protocol, (flags & AVAHI_PUBLISH_IS_PROXY), AVAHI_DEFAULT_TTL, enum_ptr, ptr_name); + +fail: + + avahi_string_list_free(strlst); + avahi_free(h); + + return ret; +} + +int avahi_server_add_service_strlst( + AvahiServer *s, + AvahiSEntryGroup *g, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiPublishFlags flags, + const char *name, + const char *type, + const char *domain, + const char *host, + uint16_t port, + AvahiStringList *strlst) { + + assert(s); + assert(type); + assert(name); + + return server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_copy(strlst)); +} + +int avahi_server_add_service_va( + AvahiServer *s, + AvahiSEntryGroup *g, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiPublishFlags flags, + const char *name, + const char *type, + const char *domain, + const char *host, + uint16_t port, + va_list va) { + + assert(s); + assert(type); + assert(name); + + return server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_new_va(va)); +} + +int avahi_server_add_service( + AvahiServer *s, + AvahiSEntryGroup *g, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiPublishFlags flags, + const char *name, + const char *type, + const char *domain, + const char *host, + uint16_t port, + ... ){ + + va_list va; + int ret; + + va_start(va, port); + ret = avahi_server_add_service_va(s, g, interface, protocol, flags, name, type, domain, host, port, va); + va_end(va); + + return ret; +} + +static int server_update_service_txt_strlst_nocopy( + AvahiServer *s, + AvahiSEntryGroup *g, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiPublishFlags flags, + const char *name, + const char *type, + const char *domain, + AvahiStringList *strlst) { + + char svc_name[AVAHI_DOMAIN_NAME_MAX]; + int ret = AVAHI_OK; + + assert(s); + assert(type); + assert(name); + + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE); + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL); + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_IS_PROXY|AVAHI_PUBLISH_NO_COOKIE), AVAHI_ERR_INVALID_FLAGS); + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME); + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE); + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME); + + if (!domain) + domain = s->domain_name; + + if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0) { + avahi_server_set_errno(s, ret); + goto fail; + } + + /* Add TXT record */ + if (!(flags & AVAHI_PUBLISH_NO_COOKIE)) + strlst = add_magic_cookie(s, strlst); + + ret = server_add_txt_strlst_nocopy(s, g, interface, protocol, (flags & AVAHI_PUBLISH_IS_PROXY) | AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_UPDATE, AVAHI_DEFAULT_TTL, svc_name, strlst); + strlst = NULL; + +fail: + + avahi_string_list_free(strlst); + + return ret; +} + +int avahi_server_update_service_txt_strlst( + AvahiServer *s, + AvahiSEntryGroup *g, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiPublishFlags flags, + const char *name, + const char *type, + const char *domain, + AvahiStringList *strlst) { + + return server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_copy(strlst)); +} + +/** Update the TXT record for a service with the NULL terminated list of strings of the va_list. */ +int avahi_server_update_service_txt_va( + AvahiServer *s, + AvahiSEntryGroup *g, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiPublishFlags flags, + const char *name, + const char *type, + const char *domain, + va_list va) { + + return server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_new_va(va)); +} + +/** Update the TXT record for a service with the NULL termonate list of strings */ +int avahi_server_update_service_txt( + AvahiServer *s, + AvahiSEntryGroup *g, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiPublishFlags flags, + const char *name, + const char *type, + const char *domain, + ...) { + + va_list va; + int ret; + + va_start(va, domain); + ret = avahi_server_update_service_txt_va(s, g, interface, protocol, flags, name, type, domain, va); + va_end(va); + + return ret; +} + +int avahi_server_add_service_subtype( + AvahiServer *s, + AvahiSEntryGroup *g, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiPublishFlags flags, + const char *name, + const char *type, + const char *domain, + const char *subtype) { + + int ret = AVAHI_OK; + char svc_name[AVAHI_DOMAIN_NAME_MAX], ptr_name[AVAHI_DOMAIN_NAME_MAX]; + + assert(name); + assert(type); + assert(subtype); + + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE); + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL); + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, 0), AVAHI_ERR_INVALID_FLAGS); + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME); + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE); + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME); + AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_subtype(subtype), AVAHI_ERR_INVALID_SERVICE_SUBTYPE); + + if (!domain) + domain = s->domain_name; + + if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 || + (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, subtype, domain)) < 0) { + avahi_server_set_errno(s, ret); + goto fail; + } + + if ((ret = avahi_server_add_ptr(s, g, interface, protocol, flags & AVAHI_PUBLISH_IS_PROXY, AVAHI_DEFAULT_TTL, ptr_name, svc_name)) < 0) + goto fail; + +fail: + + return ret; +} + +static void hexstring(char *s, size_t sl, const void *p, size_t pl) { + static const char hex[] = "0123456789abcdef"; + int b = 0; + const uint8_t *k = p; + + while (sl > 1 && pl > 0) { + *(s++) = hex[(b ? *k : *k >> 4) & 0xF]; + + if (b) { + k++; + pl--; + } + + b = !b; + + sl--; + } + + if (sl > 0) + *s = 0; +} + +int avahi_server_add_dns_server_address( + AvahiServer *s, + AvahiSEntryGroup *g, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiPublishFlags flags, + const char *domain, + AvahiDNSServerType type, + const AvahiAddress *address, + uint16_t port /** should be 53 */) { + + AvahiRecord *r; + int ret; + char n[64], h[64]; + + assert(s); + assert(address); + + if (!AVAHI_IF_VALID(interface)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE); + + if (!AVAHI_PROTO_VALID(protocol) || !AVAHI_PROTO_VALID(address->proto)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL); + + if (!AVAHI_FLAGS_VALID(flags, 0) || (type != AVAHI_DNS_SERVER_UPDATE && type != AVAHI_DNS_SERVER_RESOLVE)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS); + + if (port == 0) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PORT); + + if (domain && !avahi_is_valid_domain_name(domain)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_DOMAIN_NAME); + + if (!domain) + domain = s->domain_name; + + if (address->proto == AVAHI_PROTO_INET) { + hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv4Address)); + snprintf(n, sizeof(n), "ip-%s.%s", h, domain); + r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME); + r->data.a.address = address->data.ipv4; + } else { + hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv6Address)); + snprintf(n, sizeof(n), "ip6-%s.%s", h, domain); + r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME); + r->data.aaaa.address = address->data.ipv6; + } + + if (!r) + return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); + + ret = avahi_server_add(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r); + avahi_record_unref(r); + + if (ret < 0) + return ret; + + return avahi_server_add_dns_server_name(s, g, interface, protocol, flags, domain, type, n, port); +} + +int avahi_server_add_dns_server_name( + AvahiServer *s, + AvahiSEntryGroup *g, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiPublishFlags flags, + const char *domain, + AvahiDNSServerType type, + const char *name, + uint16_t port /** should be 53 */) { + + int ret = -1; + char t[256], *d = NULL, *n = NULL; + AvahiRecord *r; + + assert(s); + assert(name); + + if (!AVAHI_IF_VALID(interface)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE); + + if (!AVAHI_PROTO_VALID(protocol)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL); + + if (!AVAHI_FLAGS_VALID(flags, 0) || (type != AVAHI_DNS_SERVER_UPDATE && type != AVAHI_DNS_SERVER_RESOLVE)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS); + + if (port == 0) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PORT); + + if (!avahi_is_valid_domain_name(name)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_HOST_NAME); + + if (domain && !avahi_is_valid_domain_name(domain)) + return avahi_server_set_errno(s, AVAHI_ERR_INVALID_DOMAIN_NAME); + + if (!domain) + domain = s->domain_name; + + if (!(n = avahi_normalize_name_strdup(name)) || + !(d = avahi_normalize_name_strdup(domain))) { + avahi_free(n); + avahi_free(d); + return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); + } + + snprintf(t, sizeof(t), "%s.%s", type == AVAHI_DNS_SERVER_RESOLVE ? "_domain._udp" : "_dns-update._udp", d); + avahi_free(d); + + if (!(r = avahi_record_new_full(t, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) { + avahi_free(n); + return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); + } + + r->data.srv.priority = 0; + r->data.srv.weight = 0; + r->data.srv.port = port; + r->data.srv.name = n; + ret = avahi_server_add(s, g, interface, protocol, AVAHI_PUBLISH_NULL, r); + avahi_record_unref(r); + + return ret; +} + +void avahi_s_entry_group_change_state(AvahiSEntryGroup *g, AvahiEntryGroupState state) { + assert(g); + + if (g->state == state) + return; + + assert(state <= AVAHI_ENTRY_GROUP_COLLISION); + + if (g->state == AVAHI_ENTRY_GROUP_ESTABLISHED) { + + /* If the entry group was established for a time longer then + * 5s, reset the establishment trial counter */ + + if (avahi_age(&g->established_at) > 5000000) + g->n_register_try = 0; + } + + if (state == AVAHI_ENTRY_GROUP_ESTABLISHED) + + /* If the entry group is now established, remember the time + * this happened */ + + gettimeofday(&g->established_at, NULL); + + g->state = state; + + if (g->callback) + g->callback(g->server, g, state, g->userdata); +} + +AvahiSEntryGroup *avahi_s_entry_group_new(AvahiServer *s, AvahiSEntryGroupCallback callback, void* userdata) { + AvahiSEntryGroup *g; + + assert(s); + + if (!(g = avahi_new(AvahiSEntryGroup, 1))) { + avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); + return NULL; + } + + g->server = s; + g->callback = callback; + g->userdata = userdata; + g->dead = 0; + g->state = AVAHI_ENTRY_GROUP_UNCOMMITED; + g->n_probing = 0; + g->n_register_try = 0; + g->register_time_event = NULL; + g->register_time.tv_sec = 0; + g->register_time.tv_usec = 0; + AVAHI_LLIST_HEAD_INIT(AvahiEntry, g->entries); + + AVAHI_LLIST_PREPEND(AvahiSEntryGroup, groups, s->groups, g); + return g; +} + +void avahi_s_entry_group_free(AvahiSEntryGroup *g) { + AvahiEntry *e; + + assert(g); + assert(g->server); + + for (e = g->entries; e; e = e->by_group_next) { + if (!e->dead) { + avahi_goodbye_entry(g->server, e, 1, 1); + e->dead = 1; + } + } + + if (g->register_time_event) { + avahi_time_event_free(g->register_time_event); + g->register_time_event = NULL; + } + + g->dead = 1; + + g->server->need_group_cleanup = 1; + g->server->need_entry_cleanup = 1; +} + +static void entry_group_commit_real(AvahiSEntryGroup *g) { + assert(g); + + gettimeofday(&g->register_time, NULL); + + avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING); + + if (!g->dead) { + avahi_announce_group(g->server, g); + avahi_s_entry_group_check_probed(g, 0); + } +} + +static void entry_group_register_time_event_callback(AvahiTimeEvent *e, void* userdata) { + AvahiSEntryGroup *g = userdata; + assert(g); + +/* avahi_log_debug("Holdoff passed, waking up and going on."); */ + + avahi_time_event_free(g->register_time_event); + g->register_time_event = NULL; + + /* Holdoff time passed, so let's start probing */ + entry_group_commit_real(g); +} + +int avahi_s_entry_group_commit(AvahiSEntryGroup *g) { + struct timeval now; + + assert(g); + assert(!g->dead); + + if (g->state != AVAHI_ENTRY_GROUP_UNCOMMITED && g->state != AVAHI_ENTRY_GROUP_COLLISION) + return avahi_server_set_errno(g->server, AVAHI_ERR_BAD_STATE); + + g->n_register_try++; + + avahi_timeval_add(&g->register_time, + 1000*(g->n_register_try >= AVAHI_RR_RATE_LIMIT_COUNT ? + AVAHI_RR_HOLDOFF_MSEC_RATE_LIMIT : + AVAHI_RR_HOLDOFF_MSEC)); + + gettimeofday(&now, NULL); + + if (avahi_timeval_compare(&g->register_time, &now) <= 0) { + /* Holdoff time passed, so let's start probing */ +/* avahi_log_debug("Holdoff passed, directly going on."); */ + + entry_group_commit_real(g); + } else { +/* avahi_log_debug("Holdoff not passed, sleeping."); */ + + /* Holdoff time has not yet passed, so let's wait */ + assert(!g->register_time_event); + g->register_time_event = avahi_time_event_new(g->server->time_event_queue, &g->register_time, entry_group_register_time_event_callback, g); + + avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING); + } + + return AVAHI_OK; +} + +void avahi_s_entry_group_reset(AvahiSEntryGroup *g) { + AvahiEntry *e; + assert(g); + + for (e = g->entries; e; e = e->by_group_next) { + if (!e->dead) { + avahi_goodbye_entry(g->server, e, 1, 1); + e->dead = 1; + } + } + g->server->need_entry_cleanup = 1; + + if (g->register_time_event) { + avahi_time_event_free(g->register_time_event); + g->register_time_event = NULL; + } + + g->n_probing = 0; + + gettimeofday(&g->register_time, NULL); + + avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_UNCOMMITED); +} + +int avahi_entry_is_commited(AvahiEntry *e) { + assert(e); + assert(!e->dead); + + return !e->group || + e->group->state == AVAHI_ENTRY_GROUP_REGISTERING || + e->group->state == AVAHI_ENTRY_GROUP_ESTABLISHED; +} + +AvahiEntryGroupState avahi_s_entry_group_get_state(AvahiSEntryGroup *g) { + assert(g); + assert(!g->dead); + + return g->state; +} + +void avahi_s_entry_group_set_data(AvahiSEntryGroup *g, void* userdata) { + assert(g); + + g->userdata = userdata; +} + +void* avahi_s_entry_group_get_data(AvahiSEntryGroup *g) { + assert(g); + + return g->userdata; +} + +int avahi_s_entry_group_is_empty(AvahiSEntryGroup *g) { + AvahiEntry *e; + assert(g); + + /* Look for an entry that is not dead */ + for (e = g->entries; e; e = e->by_group_next) + if (!e->dead) + return 0; + + return 1; +} diff --git a/avahi-core/server.c b/avahi-core/server.c index 96311ea..40d437e 100644 --- a/avahi-core/server.c +++ b/avahi-core/server.c @@ -45,84 +45,6 @@ #include "log.h" #include "util.h" -#define AVAHI_RR_HOLDOFF_MSEC 1000 -#define AVAHI_RR_HOLDOFF_MSEC_RATE_LIMIT 60000 -#define AVAHI_RR_RATE_LIMIT_COUNT 15 - -static void free_entry(AvahiServer*s, AvahiEntry *e) { - AvahiEntry *t; - - assert(s); - assert(e); - - avahi_goodbye_entry(s, e, 1, 1); - - /* Remove from linked list */ - AVAHI_LLIST_REMOVE(AvahiEntry, entries, s->entries, e); - - /* Remove from hash table indexed by name */ - t = avahi_hashmap_lookup(s->entries_by_key, e->record->key); - AVAHI_LLIST_REMOVE(AvahiEntry, by_key, t, e); - if (t) - avahi_hashmap_replace(s->entries_by_key, t->record->key, t); - else - avahi_hashmap_remove(s->entries_by_key, e->record->key); - - /* Remove from associated group */ - if (e->group) - AVAHI_LLIST_REMOVE(AvahiEntry, by_group, e->group->entries, e); - - avahi_record_unref(e->record); - avahi_free(e); -} - -static void free_group(AvahiServer *s, AvahiSEntryGroup *g) { - assert(s); - assert(g); - - while (g->entries) - free_entry(s, g->entries); - - if (g->register_time_event) - avahi_time_event_free(g->register_time_event); - - AVAHI_LLIST_REMOVE(AvahiSEntryGroup, groups, s->groups, g); - avahi_free(g); -} - -static void cleanup_dead(AvahiServer *s) { - assert(s); - - if (s->need_group_cleanup) { - AvahiSEntryGroup *g, *next; - - for (g = s->groups; g; g = next) { - next = g->groups_next; - - if (g->dead) - free_group(s, g); - } - - s->need_group_cleanup = 0; - } - - if (s->need_entry_cleanup) { - AvahiEntry *e, *next; - - for (e = s->entries; e; e = next) { - next = e->entries_next; - - if (e->dead) - free_entry(s, e); - } - - s->need_entry_cleanup = 0; - } - - if (s->need_browser_cleanup) - avahi_browser_cleanup(s); -} - static void enum_aux_records(AvahiServer *s, AvahiInterface *i, const char *name, uint16_t type, void (*callback)(AvahiServer *s, AvahiRecord *r, int flush_cache, void* userdata), void* userdata) { AvahiKey *k; AvahiEntry *e; @@ -1064,6 +986,13 @@ static void dispatch_legacy_unicast_packet(AvahiServer *s, AvahiDnsPacket *p, co avahi_dns_packet_set_field(p, AVAHI_DNS_FIELD_ID, slot->id); } +static void cleanup_dead(AvahiServer *s) { + assert(s); + + avahi_cleanup_dead_entries(s); + avahi_browser_cleanup(s); +} + static void socket_event(AvahiWatch *w, int fd, AvahiWatchEvent events, void *userdata) { AvahiServer *s = userdata; AvahiAddress dest; @@ -1480,12 +1409,12 @@ void avahi_server_free(AvahiServer* s) { /* Remove all locally rgeistered stuff */ while(s->entries) - free_entry(s, s->entries); + avahi_entry_free(s, s->entries); avahi_interface_monitor_free(s->monitor); while (s->groups) - free_group(s, s->groups); + avahi_entry_group_free(s, s->groups); free_slots(s); @@ -1534,1104 +1463,6 @@ void avahi_server_free(AvahiServer* s) { avahi_free(s); } -static int check_record_conflict(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, AvahiRecord *r, AvahiPublishFlags flags) { - AvahiEntry *e; - - assert(s); - assert(r); - - for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) { - if (e->dead) - continue; - - if (!(flags & AVAHI_PUBLISH_UNIQUE) && !(e->flags & AVAHI_PUBLISH_UNIQUE)) - continue; - - if ((flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) && (e->flags & AVAHI_PUBLISH_ALLOW_MULTIPLE) ) - continue; - - if ((interface <= 0 || - e->interface <= 0 || - e->interface == interface) && - (protocol == AVAHI_PROTO_UNSPEC || - e->protocol == AVAHI_PROTO_UNSPEC || - e->protocol == protocol)) - - return -1; - } - - return 0; -} - -int avahi_server_add( - AvahiServer *s, - AvahiSEntryGroup *g, - AvahiIfIndex interface, - AvahiProtocol protocol, - AvahiPublishFlags flags, - AvahiRecord *r) { - - assert(s); - assert(r); - - if (!AVAHI_IF_VALID(interface)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE); - - if (!AVAHI_PROTO_VALID(protocol)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL); - - if (!AVAHI_FLAGS_VALID( - flags, - AVAHI_PUBLISH_NO_ANNOUNCE| - AVAHI_PUBLISH_NO_PROBE| - AVAHI_PUBLISH_UNIQUE| - AVAHI_PUBLISH_ALLOW_MULTIPLE| - AVAHI_PUBLISH_IS_PROXY| - AVAHI_PUBLISH_UPDATE)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS); - - if (!avahi_is_valid_domain_name(r->key->name)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_HOST_NAME); - - if (r->ttl == 0) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_TTL); - - if (avahi_key_is_pattern(r->key)) - return avahi_server_set_errno(s, AVAHI_ERR_IS_PATTERN); - - if (!avahi_record_is_valid(r)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_RECORD); - - if (flags & AVAHI_PUBLISH_UPDATE) { - AvahiEntry *e; - AvahiRecord *old_record; - int is_first = 1; - - /* Update and existing record */ - - /* Find the first matching entry */ - for (e = avahi_hashmap_lookup(s->entries_by_key, r->key); e; e = e->by_key_next) { - if (!e->dead && e->group == g && e->interface == interface && e->protocol == protocol) - break; - - is_first = 0; - } - - /* Hmm, nothing found? */ - if (!e) - return avahi_server_set_errno(s, AVAHI_ERR_NOT_FOUND); - - /* Update the entry */ - old_record = e->record; - e->record = avahi_record_ref(r); - e->flags = flags; - - /* Announce our changes when needed */ - if (!avahi_record_equal_no_ttl(old_record, r) && (!g || g->state != AVAHI_ENTRY_GROUP_UNCOMMITED)) { - - /* Remove the old entry from all caches, if needed */ - if (!(e->flags & AVAHI_PUBLISH_UNIQUE)) - avahi_goodbye_entry(s, e, 1, 0); - - /* Reannounce our updated entry */ - avahi_reannounce_entry(s, e); - } - - /* If we were the first entry in the list, we need to update the key */ - if (is_first) - avahi_hashmap_replace(s->entries_by_key, e->record->key, e); - - avahi_record_unref(old_record); - - } else { - AvahiEntry *e, *t; - - /* Add a new record */ - - if (check_record_conflict(s, interface, protocol, r, flags) < 0) - return avahi_server_set_errno(s, AVAHI_ERR_LOCAL_COLLISION); - - if (!(e = avahi_new(AvahiEntry, 1))) - return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); - - e->server = s; - e->record = avahi_record_ref(r); - e->group = g; - e->interface = interface; - e->protocol = protocol; - e->flags = flags; - e->dead = 0; - - AVAHI_LLIST_HEAD_INIT(AvahiAnnouncer, e->announcers); - - AVAHI_LLIST_PREPEND(AvahiEntry, entries, s->entries, e); - - /* Insert into hash table indexed by name */ - t = avahi_hashmap_lookup(s->entries_by_key, e->record->key); - AVAHI_LLIST_PREPEND(AvahiEntry, by_key, t, e); - avahi_hashmap_replace(s->entries_by_key, e->record->key, t); - - /* Insert into group list */ - if (g) - AVAHI_LLIST_PREPEND(AvahiEntry, by_group, g->entries, e); - - avahi_announce_entry(s, e); - } - - return AVAHI_OK; -} - -const AvahiRecord *avahi_server_iterate(AvahiServer *s, AvahiSEntryGroup *g, void **state) { - AvahiEntry **e = (AvahiEntry**) state; - assert(s); - assert(e); - - if (!*e) - *e = g ? g->entries : s->entries; - - while (*e && (*e)->dead) - *e = g ? (*e)->by_group_next : (*e)->entries_next; - - if (!*e) - return NULL; - - return avahi_record_ref((*e)->record); -} - -int avahi_server_dump(AvahiServer *s, AvahiDumpCallback callback, void* userdata) { - AvahiEntry *e; - - assert(s); - assert(callback); - - callback(";;; ZONE DUMP FOLLOWS ;;;", userdata); - - for (e = s->entries; e; e = e->entries_next) { - char *t; - char ln[256]; - - if (e->dead) - continue; - - if (!(t = avahi_record_to_string(e->record))) - return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); - - snprintf(ln, sizeof(ln), "%s ; iface=%i proto=%i", t, e->interface, e->protocol); - avahi_free(t); - - callback(ln, userdata); - } - - avahi_dump_caches(s->monitor, callback, userdata); - - if (s->wide_area_lookup_engine) - avahi_wide_area_cache_dump(s->wide_area_lookup_engine, callback, userdata); - return AVAHI_OK; -} - -int avahi_server_add_ptr( - AvahiServer *s, - AvahiSEntryGroup *g, - AvahiIfIndex interface, - AvahiProtocol protocol, - AvahiPublishFlags flags, - uint32_t ttl, - const char *name, - const char *dest) { - - AvahiRecord *r; - int ret; - - assert(s); - assert(dest); - - if ((name && !avahi_is_valid_domain_name(name)) || !avahi_is_valid_domain_name(dest)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_HOST_NAME); - - if (!name) - name = s->host_name_fqdn; - - if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR, ttl))) - return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); - - r->data.ptr.name = avahi_normalize_name_strdup(dest); - ret = avahi_server_add(s, g, interface, protocol, flags, r); - avahi_record_unref(r); - return ret; -} - -int avahi_server_add_address( - AvahiServer *s, - AvahiSEntryGroup *g, - AvahiIfIndex interface, - AvahiProtocol protocol, - AvahiPublishFlags flags, - const char *name, - AvahiAddress *a) { - - char *n = NULL; - int ret = AVAHI_OK; - - assert(s); - assert(a); - - if (!AVAHI_IF_VALID(interface)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE); - - if (!AVAHI_PROTO_VALID(protocol) || !AVAHI_PROTO_VALID(a->proto)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL); - - if (!AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_NO_REVERSE|AVAHI_PUBLISH_NO_ANNOUNCE|AVAHI_PUBLISH_NO_PROBE|AVAHI_PUBLISH_UPDATE)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS); - - if (name && !avahi_is_valid_domain_name(name)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_HOST_NAME); - - if (!name) - name = s->host_name_fqdn; - else { - if (!(n = avahi_normalize_name_strdup(name))) - return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); - - name = n; - } - - if (a->proto == AVAHI_PROTO_INET) { - AvahiRecord *r; - - if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME))) { - ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); - goto fail; - } - - r->data.a.address = a->data.ipv4; - ret = avahi_server_add(s, g, interface, protocol, (flags & ~ AVAHI_PUBLISH_NO_REVERSE) | AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r); - avahi_record_unref(r); - - if (ret < 0) - goto fail; - - if (!(flags & AVAHI_PUBLISH_NO_REVERSE)) { - char *reverse; - - if (!(reverse = avahi_reverse_lookup_name_ipv4(&a->data.ipv4))) { - ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); - goto fail; - } - - ret = avahi_server_add_ptr(s, g, interface, protocol, flags | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL_HOST_NAME, reverse, name); - avahi_free(reverse); - } - - } else { - AvahiRecord *r; - - assert(a->proto == AVAHI_PROTO_INET6); - - if (!(r = avahi_record_new_full(name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME))) { - ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); - goto fail; - } - - r->data.aaaa.address = a->data.ipv6; - ret = avahi_server_add(s, g, interface, protocol, (flags & ~ AVAHI_PUBLISH_NO_REVERSE) | AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r); - avahi_record_unref(r); - - if (ret < 0) - goto fail; - - if (!(flags & AVAHI_PUBLISH_NO_REVERSE)) { - char *reverse; - - if (!(reverse = avahi_reverse_lookup_name_ipv6_arpa(&a->data.ipv6))) { - ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); - goto fail; - } - - ret = avahi_server_add_ptr(s, g, interface, protocol, flags | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL_HOST_NAME, reverse, name); - avahi_free(reverse); - - if (ret < 0) - goto fail; - - if (!(reverse = avahi_reverse_lookup_name_ipv6_int(&a->data.ipv6))) { - ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); - goto fail; - } - - ret = avahi_server_add_ptr(s, g, interface, protocol, flags | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL_HOST_NAME, reverse, name); - avahi_free(reverse); - } - } - -fail: - - avahi_free(n); - - return ret; -} - -static int server_add_txt_strlst_nocopy( - AvahiServer *s, - AvahiSEntryGroup *g, - AvahiIfIndex interface, - AvahiProtocol protocol, - AvahiPublishFlags flags, - uint32_t ttl, - const char *name, - AvahiStringList *strlst) { - - AvahiRecord *r; - int ret; - - assert(s); - - if (!(r = avahi_record_new_full(name ? name : s->host_name_fqdn, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_TXT, ttl))) { - avahi_string_list_free(strlst); - return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); - } - - r->data.txt.string_list = strlst; - ret = avahi_server_add(s, g, interface, protocol, flags, r); - avahi_record_unref(r); - - return ret; -} - -int avahi_server_add_txt_strlst( - AvahiServer *s, - AvahiSEntryGroup *g, - AvahiIfIndex interface, - AvahiProtocol protocol, - AvahiPublishFlags flags, - uint32_t ttl, - const char *name, - AvahiStringList *strlst) { - - assert(s); - - return server_add_txt_strlst_nocopy(s, g, interface, protocol, flags, ttl, name, avahi_string_list_copy(strlst)); -} - -int avahi_server_add_txt_va( - AvahiServer *s, - AvahiSEntryGroup *g, - AvahiIfIndex interface, - AvahiProtocol protocol, - AvahiPublishFlags flags, - uint32_t ttl, - const char *name, - va_list va) { - - assert(s); - - return server_add_txt_strlst_nocopy(s, g, interface, protocol, flags, ttl, name, avahi_string_list_new_va(va)); -} - -int avahi_server_add_txt( - AvahiServer *s, - AvahiSEntryGroup *g, - AvahiIfIndex interface, - AvahiProtocol protocol, - AvahiPublishFlags flags, - uint32_t ttl, - const char *name, - ...) { - - va_list va; - int ret; - - assert(s); - - va_start(va, name); - ret = avahi_server_add_txt_va(s, g, interface, protocol, flags, ttl, name, va); - va_end(va); - - return ret; -} - -static AvahiStringList *add_magic_cookie( - AvahiServer *s, - AvahiStringList *strlst) { - - assert(s); - - if (!s->config.add_service_cookie) - return strlst; - - if (avahi_string_list_find(strlst, AVAHI_SERVICE_COOKIE)) - /* This string list already contains a magic cookie */ - return strlst; - - return avahi_string_list_add_printf(strlst, AVAHI_SERVICE_COOKIE"=%u", s->local_service_cookie); -} - -static int server_add_service_strlst_nocopy( - AvahiServer *s, - AvahiSEntryGroup *g, - AvahiIfIndex interface, - AvahiProtocol protocol, - AvahiPublishFlags flags, - const char *name, - const char *type, - const char *domain, - const char *host, - uint16_t port, - AvahiStringList *strlst) { - - char ptr_name[AVAHI_DOMAIN_NAME_MAX], svc_name[AVAHI_DOMAIN_NAME_MAX], enum_ptr[AVAHI_DOMAIN_NAME_MAX], *h = NULL; - AvahiRecord *r = NULL; - int ret = AVAHI_OK; - - assert(s); - assert(type); - assert(name); - - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE); - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL); - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_NO_COOKIE|AVAHI_PUBLISH_IS_PROXY|AVAHI_PUBLISH_UPDATE), AVAHI_ERR_INVALID_FLAGS); - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME); - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE); - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME); - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !host || avahi_is_valid_domain_name(host), AVAHI_ERR_INVALID_HOST_NAME); - - if (!domain) - domain = s->domain_name; - - if (!host) - host = s->host_name_fqdn; - - if (!(h = avahi_normalize_name_strdup(host))) { - ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); - goto fail; - } - - if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 || - (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, type, domain)) < 0 || - (ret = avahi_service_name_join(enum_ptr, sizeof(enum_ptr), NULL, "_services._dns-sd._udp", domain)) < 0) { - avahi_server_set_errno(s, ret); - goto fail; - } - - /* Add service enumeration PTR record */ - - if ((ret = avahi_server_add_ptr(s, g, interface, protocol, flags & AVAHI_PUBLISH_IS_PROXY, AVAHI_DEFAULT_TTL, ptr_name, svc_name)) < 0) - goto fail; - - /* Add SRV record */ - - if (!(r = avahi_record_new_full(svc_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) { - ret = avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); - goto fail; - } - - r->data.srv.priority = 0; - r->data.srv.weight = 0; - r->data.srv.port = port; - r->data.srv.name = h; - h = NULL; - ret = avahi_server_add(s, g, interface, protocol, (flags & AVAHI_PUBLISH_IS_PROXY) | AVAHI_PUBLISH_UNIQUE, r); - avahi_record_unref(r); - - if (ret < 0) - goto fail; - - /* Add TXT record */ - - if (!(flags & AVAHI_PUBLISH_NO_COOKIE)) - strlst = add_magic_cookie(s, strlst); - - ret = server_add_txt_strlst_nocopy(s, g, interface, protocol, (flags & AVAHI_PUBLISH_IS_PROXY) | AVAHI_PUBLISH_UNIQUE, AVAHI_DEFAULT_TTL, svc_name, strlst); - strlst = NULL; - - if (ret < 0) - goto fail; - - /* Add service type enumeration record */ - - ret = avahi_server_add_ptr(s, g, interface, protocol, (flags & AVAHI_PUBLISH_IS_PROXY), AVAHI_DEFAULT_TTL, enum_ptr, ptr_name); - -fail: - - avahi_string_list_free(strlst); - avahi_free(h); - - return ret; -} - -int avahi_server_add_service_strlst( - AvahiServer *s, - AvahiSEntryGroup *g, - AvahiIfIndex interface, - AvahiProtocol protocol, - AvahiPublishFlags flags, - const char *name, - const char *type, - const char *domain, - const char *host, - uint16_t port, - AvahiStringList *strlst) { - - assert(s); - assert(type); - assert(name); - - return server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_copy(strlst)); -} - -int avahi_server_add_service_va( - AvahiServer *s, - AvahiSEntryGroup *g, - AvahiIfIndex interface, - AvahiProtocol protocol, - AvahiPublishFlags flags, - const char *name, - const char *type, - const char *domain, - const char *host, - uint16_t port, - va_list va) { - - assert(s); - assert(type); - assert(name); - - return server_add_service_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, host, port, avahi_string_list_new_va(va)); -} - -int avahi_server_add_service( - AvahiServer *s, - AvahiSEntryGroup *g, - AvahiIfIndex interface, - AvahiProtocol protocol, - AvahiPublishFlags flags, - const char *name, - const char *type, - const char *domain, - const char *host, - uint16_t port, - ... ){ - - va_list va; - int ret; - - va_start(va, port); - ret = avahi_server_add_service_va(s, g, interface, protocol, flags, name, type, domain, host, port, va); - va_end(va); - - return ret; -} - -static int server_update_service_txt_strlst_nocopy( - AvahiServer *s, - AvahiSEntryGroup *g, - AvahiIfIndex interface, - AvahiProtocol protocol, - AvahiPublishFlags flags, - const char *name, - const char *type, - const char *domain, - AvahiStringList *strlst) { - - char svc_name[AVAHI_DOMAIN_NAME_MAX]; - int ret = AVAHI_OK; - - assert(s); - assert(type); - assert(name); - - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE); - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL); - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, AVAHI_PUBLISH_IS_PROXY|AVAHI_PUBLISH_NO_COOKIE), AVAHI_ERR_INVALID_FLAGS); - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME); - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE); - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME); - - if (!domain) - domain = s->domain_name; - - if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0) { - avahi_server_set_errno(s, ret); - goto fail; - } - - /* Add TXT record */ - if (!(flags & AVAHI_PUBLISH_NO_COOKIE)) - strlst = add_magic_cookie(s, strlst); - - ret = server_add_txt_strlst_nocopy(s, g, interface, protocol, (flags & AVAHI_PUBLISH_IS_PROXY) | AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_UPDATE, AVAHI_DEFAULT_TTL, svc_name, strlst); - strlst = NULL; - -fail: - - avahi_string_list_free(strlst); - - return ret; -} - -int avahi_server_update_service_txt_strlst( - AvahiServer *s, - AvahiSEntryGroup *g, - AvahiIfIndex interface, - AvahiProtocol protocol, - AvahiPublishFlags flags, - const char *name, - const char *type, - const char *domain, - AvahiStringList *strlst) { - - return server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_copy(strlst)); -} - -/** Update the TXT record for a service with the NULL terminated list of strings of the va_list. */ -int avahi_server_update_service_txt_va( - AvahiServer *s, - AvahiSEntryGroup *g, - AvahiIfIndex interface, - AvahiProtocol protocol, - AvahiPublishFlags flags, - const char *name, - const char *type, - const char *domain, - va_list va) { - - return server_update_service_txt_strlst_nocopy(s, g, interface, protocol, flags, name, type, domain, avahi_string_list_new_va(va)); -} - -/** Update the TXT record for a service with the NULL termonate list of strings */ -int avahi_server_update_service_txt( - AvahiServer *s, - AvahiSEntryGroup *g, - AvahiIfIndex interface, - AvahiProtocol protocol, - AvahiPublishFlags flags, - const char *name, - const char *type, - const char *domain, - ...) { - - va_list va; - int ret; - - va_start(va, domain); - ret = avahi_server_update_service_txt_va(s, g, interface, protocol, flags, name, type, domain, va); - va_end(va); - - return ret; -} - -int avahi_server_add_service_subtype( - AvahiServer *s, - AvahiSEntryGroup *g, - AvahiIfIndex interface, - AvahiProtocol protocol, - AvahiPublishFlags flags, - const char *name, - const char *type, - const char *domain, - const char *subtype) { - - int ret = AVAHI_OK; - char svc_name[AVAHI_DOMAIN_NAME_MAX], ptr_name[AVAHI_DOMAIN_NAME_MAX]; - - assert(name); - assert(type); - assert(subtype); - - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE); - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL); - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, AVAHI_FLAGS_VALID(flags, 0), AVAHI_ERR_INVALID_FLAGS); - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_name(name), AVAHI_ERR_INVALID_SERVICE_NAME); - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_type_strict(type), AVAHI_ERR_INVALID_SERVICE_TYPE); - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME); - AVAHI_CHECK_VALIDITY_SET_RET_GOTO_FAIL(s, avahi_is_valid_service_subtype(subtype), AVAHI_ERR_INVALID_SERVICE_SUBTYPE); - - if (!domain) - domain = s->domain_name; - - if ((ret = avahi_service_name_join(svc_name, sizeof(svc_name), name, type, domain)) < 0 || - (ret = avahi_service_name_join(ptr_name, sizeof(ptr_name), NULL, subtype, domain)) < 0) { - avahi_server_set_errno(s, ret); - goto fail; - } - - if ((ret = avahi_server_add_ptr(s, g, interface, protocol, flags & AVAHI_PUBLISH_IS_PROXY, AVAHI_DEFAULT_TTL, ptr_name, svc_name)) < 0) - goto fail; - -fail: - - return ret; -} - -static void hexstring(char *s, size_t sl, const void *p, size_t pl) { - static const char hex[] = "0123456789abcdef"; - int b = 0; - const uint8_t *k = p; - - while (sl > 1 && pl > 0) { - *(s++) = hex[(b ? *k : *k >> 4) & 0xF]; - - if (b) { - k++; - pl--; - } - - b = !b; - - sl--; - } - - if (sl > 0) - *s = 0; -} - -int avahi_server_add_dns_server_address( - AvahiServer *s, - AvahiSEntryGroup *g, - AvahiIfIndex interface, - AvahiProtocol protocol, - AvahiPublishFlags flags, - const char *domain, - AvahiDNSServerType type, - const AvahiAddress *address, - uint16_t port /** should be 53 */) { - - AvahiRecord *r; - int ret; - char n[64], h[64]; - - assert(s); - assert(address); - - if (!AVAHI_IF_VALID(interface)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE); - - if (!AVAHI_PROTO_VALID(protocol) || !AVAHI_PROTO_VALID(address->proto)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL); - - if (!AVAHI_FLAGS_VALID(flags, 0) || (type != AVAHI_DNS_SERVER_UPDATE && type != AVAHI_DNS_SERVER_RESOLVE)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS); - - if (port == 0) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PORT); - - if (domain && !avahi_is_valid_domain_name(domain)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_DOMAIN_NAME); - - if (!domain) - domain = s->domain_name; - - if (address->proto == AVAHI_PROTO_INET) { - hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv4Address)); - snprintf(n, sizeof(n), "ip-%s.%s", h, domain); - r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME); - r->data.a.address = address->data.ipv4; - } else { - hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv6Address)); - snprintf(n, sizeof(n), "ip6-%s.%s", h, domain); - r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME); - r->data.aaaa.address = address->data.ipv6; - } - - if (!r) - return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); - - ret = avahi_server_add(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r); - avahi_record_unref(r); - - if (ret < 0) - return ret; - - return avahi_server_add_dns_server_name(s, g, interface, protocol, flags, domain, type, n, port); -} - -int avahi_server_add_dns_server_name( - AvahiServer *s, - AvahiSEntryGroup *g, - AvahiIfIndex interface, - AvahiProtocol protocol, - AvahiPublishFlags flags, - const char *domain, - AvahiDNSServerType type, - const char *name, - uint16_t port /** should be 53 */) { - - int ret = -1; - char t[256], *d = NULL, *n = NULL; - AvahiRecord *r; - - assert(s); - assert(name); - - if (!AVAHI_IF_VALID(interface)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE); - - if (!AVAHI_PROTO_VALID(protocol)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL); - - if (!AVAHI_FLAGS_VALID(flags, 0) || (type != AVAHI_DNS_SERVER_UPDATE && type != AVAHI_DNS_SERVER_RESOLVE)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS); - - if (port == 0) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PORT); - - if (!avahi_is_valid_domain_name(name)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_HOST_NAME); - - if (domain && !avahi_is_valid_domain_name(domain)) - return avahi_server_set_errno(s, AVAHI_ERR_INVALID_DOMAIN_NAME); - - if (!domain) - domain = s->domain_name; - - if (!(n = avahi_normalize_name_strdup(name)) || - !(d = avahi_normalize_name_strdup(domain))) { - avahi_free(n); - avahi_free(d); - return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); - } - - snprintf(t, sizeof(t), "%s.%s", type == AVAHI_DNS_SERVER_RESOLVE ? "_domain._udp" : "_dns-update._udp", d); - avahi_free(d); - - if (!(r = avahi_record_new_full(t, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV, AVAHI_DEFAULT_TTL_HOST_NAME))) { - avahi_free(n); - return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); - } - - r->data.srv.priority = 0; - r->data.srv.weight = 0; - r->data.srv.port = port; - r->data.srv.name = n; - ret = avahi_server_add(s, g, interface, protocol, AVAHI_PUBLISH_NULL, r); - avahi_record_unref(r); - - return ret; -} - -static void post_query_callback(AvahiInterfaceMonitor *m, AvahiInterface *i, void* userdata) { - AvahiKey *k = userdata; - - assert(m); - assert(i); - assert(k); - - avahi_interface_post_query(i, k, 0); -} - -void avahi_server_post_query(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, AvahiKey *key) { - assert(s); - assert(key); - - avahi_interface_monitor_walk(s->monitor, interface, protocol, post_query_callback, key); -} - -void avahi_s_entry_group_change_state(AvahiSEntryGroup *g, AvahiEntryGroupState state) { - assert(g); - - if (g->state == state) - return; - - assert(state <= AVAHI_ENTRY_GROUP_COLLISION); - - if (g->state == AVAHI_ENTRY_GROUP_ESTABLISHED) { - - /* If the entry group was established for a time longer then - * 5s, reset the establishment trial counter */ - - if (avahi_age(&g->established_at) > 5000000) - g->n_register_try = 0; - } - - if (state == AVAHI_ENTRY_GROUP_ESTABLISHED) - - /* If the entry group is now established, remember the time - * this happened */ - - gettimeofday(&g->established_at, NULL); - - g->state = state; - - if (g->callback) - g->callback(g->server, g, state, g->userdata); -} - -AvahiSEntryGroup *avahi_s_entry_group_new(AvahiServer *s, AvahiSEntryGroupCallback callback, void* userdata) { - AvahiSEntryGroup *g; - - assert(s); - - if (!(g = avahi_new(AvahiSEntryGroup, 1))) { - avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY); - return NULL; - } - - g->server = s; - g->callback = callback; - g->userdata = userdata; - g->dead = 0; - g->state = AVAHI_ENTRY_GROUP_UNCOMMITED; - g->n_probing = 0; - g->n_register_try = 0; - g->register_time_event = NULL; - g->register_time.tv_sec = 0; - g->register_time.tv_usec = 0; - AVAHI_LLIST_HEAD_INIT(AvahiEntry, g->entries); - - AVAHI_LLIST_PREPEND(AvahiSEntryGroup, groups, s->groups, g); - return g; -} - -void avahi_s_entry_group_free(AvahiSEntryGroup *g) { - AvahiEntry *e; - - assert(g); - assert(g->server); - - for (e = g->entries; e; e = e->by_group_next) { - if (!e->dead) { - avahi_goodbye_entry(g->server, e, 1, 1); - e->dead = 1; - } - } - - if (g->register_time_event) { - avahi_time_event_free(g->register_time_event); - g->register_time_event = NULL; - } - - g->dead = 1; - - g->server->need_group_cleanup = 1; - g->server->need_entry_cleanup = 1; -} - -static void entry_group_commit_real(AvahiSEntryGroup *g) { - assert(g); - - gettimeofday(&g->register_time, NULL); - - avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING); - - if (!g->dead) { - avahi_announce_group(g->server, g); - avahi_s_entry_group_check_probed(g, 0); - } -} - -static void entry_group_register_time_event_callback(AvahiTimeEvent *e, void* userdata) { - AvahiSEntryGroup *g = userdata; - assert(g); - -/* avahi_log_debug("Holdoff passed, waking up and going on."); */ - - avahi_time_event_free(g->register_time_event); - g->register_time_event = NULL; - - /* Holdoff time passed, so let's start probing */ - entry_group_commit_real(g); -} - -int avahi_s_entry_group_commit(AvahiSEntryGroup *g) { - struct timeval now; - - assert(g); - assert(!g->dead); - - if (g->state != AVAHI_ENTRY_GROUP_UNCOMMITED && g->state != AVAHI_ENTRY_GROUP_COLLISION) - return avahi_server_set_errno(g->server, AVAHI_ERR_BAD_STATE); - - g->n_register_try++; - - avahi_timeval_add(&g->register_time, - 1000*(g->n_register_try >= AVAHI_RR_RATE_LIMIT_COUNT ? - AVAHI_RR_HOLDOFF_MSEC_RATE_LIMIT : - AVAHI_RR_HOLDOFF_MSEC)); - - gettimeofday(&now, NULL); - - if (avahi_timeval_compare(&g->register_time, &now) <= 0) { - /* Holdoff time passed, so let's start probing */ -/* avahi_log_debug("Holdoff passed, directly going on."); */ - - entry_group_commit_real(g); - } else { -/* avahi_log_debug("Holdoff not passed, sleeping."); */ - - /* Holdoff time has not yet passed, so let's wait */ - assert(!g->register_time_event); - g->register_time_event = avahi_time_event_new(g->server->time_event_queue, &g->register_time, entry_group_register_time_event_callback, g); - - avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_REGISTERING); - } - - return AVAHI_OK; -} - -void avahi_s_entry_group_reset(AvahiSEntryGroup *g) { - AvahiEntry *e; - assert(g); - - for (e = g->entries; e; e = e->by_group_next) { - if (!e->dead) { - avahi_goodbye_entry(g->server, e, 1, 1); - e->dead = 1; - } - } - g->server->need_entry_cleanup = 1; - - if (g->register_time_event) { - avahi_time_event_free(g->register_time_event); - g->register_time_event = NULL; - } - - g->n_probing = 0; - - gettimeofday(&g->register_time, NULL); - - avahi_s_entry_group_change_state(g, AVAHI_ENTRY_GROUP_UNCOMMITED); -} - -int avahi_entry_is_commited(AvahiEntry *e) { - assert(e); - assert(!e->dead); - - return !e->group || - e->group->state == AVAHI_ENTRY_GROUP_REGISTERING || - e->group->state == AVAHI_ENTRY_GROUP_ESTABLISHED; -} - -AvahiEntryGroupState avahi_s_entry_group_get_state(AvahiSEntryGroup *g) { - assert(g); - assert(!g->dead); - - return g->state; -} - -void avahi_s_entry_group_set_data(AvahiSEntryGroup *g, void* userdata) { - assert(g); - - g->userdata = userdata; -} - -void* avahi_s_entry_group_get_data(AvahiSEntryGroup *g) { - assert(g); - - return g->userdata; -} - -int avahi_s_entry_group_is_empty(AvahiSEntryGroup *g) { - AvahiEntry *e; - assert(g); - - /* Look for an entry that is not dead */ - for (e = g->entries; e; e = e->by_group_next) - if (!e->dead) - return 0; - - return 1; -} - const char* avahi_server_get_domain_name(AvahiServer *s) { assert(s); diff --git a/avahi-core/server.h b/avahi-core/server.h index 27b9607..1021836 100644 --- a/avahi-core/server.h +++ b/avahi-core/server.h @@ -44,6 +44,10 @@ typedef struct AvahiEntry AvahiEntry; #define AVAHI_FLAGS_VALID(flags, max) (!((flags) & ~(max))) +#define AVAHI_RR_HOLDOFF_MSEC 1000 +#define AVAHI_RR_HOLDOFF_MSEC_RATE_LIMIT 60000 +#define AVAHI_RR_RATE_LIMIT_COUNT 15 + typedef struct AvahiLegacyUnicastReflectSlot AvahiLegacyUnicastReflectSlot; struct AvahiLegacyUnicastReflectSlot { @@ -154,9 +158,10 @@ struct AvahiServer { AvahiWideAreaLookupEngine *wide_area_lookup_engine; }; -int avahi_server_entry_match_interface(AvahiEntry *e, AvahiInterface *i); +void avahi_entry_free(AvahiServer*s, AvahiEntry *e); +void avahi_entry_group_free(AvahiServer *s, AvahiSEntryGroup *g); -void avahi_server_post_query(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, AvahiKey *key); +void avahi_cleanup_dead_entries(AvahiServer *s); void avahi_server_prepare_response(AvahiServer *s, AvahiInterface *i, AvahiEntry *e, int unicast_response, int auxiliary); void avahi_server_prepare_matching_responses(AvahiServer *s, AvahiInterface *i, AvahiKey *k, int unicast_response); -- 2.39.5