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

1 files changed, 1201 insertions, 0 deletions

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 <config.h>
+#endif
+
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <sys/utsname.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdio.h>
+#include <assert.h>
+#include <stdlib.h>
+
+#include <avahi-common/domain.h>
+#include <avahi-common/timeval.h>
+#include <avahi-common/malloc.h>
+#include <avahi-common/error.h>
+
+#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;
+}