X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=avahi-core%2Fresolve-host-name.c;h=08f209b62676083ea8503066a47fa0c082855b9e;hb=574fff373fdb2d670aba7f55c115dd43b38860fe;hp=f031838a0e095bfdb480f282dc4d865de2a9890e;hpb=3a57a2e982bbe5c4b615871013c86b75fe21b984;p=catta

diff --git a/avahi-core/resolve-host-name.c b/avahi-core/resolve-host-name.c
index f031838..08f209b 100644
--- a/avahi-core/resolve-host-name.c
+++ b/avahi-core/resolve-host-name.c
@@ -1,18 +1,16 @@
-/* $Id$ */
-
 /***
   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
@@ -23,82 +21,277 @@
 #include <config.h>
 #endif
 
-#include "resolve.h"
-#include "util.h"
+#include <stdlib.h>
+
+#include <avahi-common/domain.h>
+#include <avahi-common/timeval.h>
+#include <avahi-common/malloc.h>
+#include <avahi-common/error.h>
 
-struct AvahiHostNameResolver {
+#include "browse.h"
+#include "log.h"
+
+#define TIMEOUT_MSEC 5000
+
+struct AvahiSHostNameResolver {
     AvahiServer *server;
-    gchar *host_name;
-    
-    AvahiRecordResolver *record_resolver_a;
-    AvahiRecordResolver *record_resolver_aaaa;
+    char *host_name;
+
+    AvahiSRecordBrowser *record_browser_a;
+    AvahiSRecordBrowser *record_browser_aaaa;
+
+    AvahiSHostNameResolverCallback callback;
+    void* userdata;
+
+    AvahiRecord *address_record;
+    AvahiIfIndex interface;
+    AvahiProtocol protocol;
+    AvahiLookupResultFlags flags;
 
-    AvahiHostNameResolverCallback callback;
-    gpointer userdata;
+    AvahiTimeEvent *time_event;
 
-    AVAHI_LLIST_FIELDS(AvahiHostNameResolver, resolver);
+    AVAHI_LLIST_FIELDS(AvahiSHostNameResolver, resolver);
 };
 
-static void record_resolver_callback(AvahiRecordResolver*rr, gint interface, guchar protocol, AvahiBrowserEvent event, AvahiRecord *record, gpointer userdata) {
-    AvahiHostNameResolver *r = userdata;
-    AvahiAddress a;
+static void finish(AvahiSHostNameResolver *r, AvahiResolverEvent event) {
+    assert(r);
 
-    g_assert(rr);
-    g_assert(record);
-    g_assert(r);
+    if (r->time_event) {
+        avahi_time_event_free(r->time_event);
+        r->time_event = NULL;
+    }
 
-    switch (record->key->type) {
-        case AVAHI_DNS_TYPE_A:
-            a.family = AF_INET;
-            a.data.ipv4 = record->data.a.address;
-            break;
+    switch (event) {
+        case AVAHI_RESOLVER_FOUND: {
+            AvahiAddress a;
+
+            assert(r->address_record);
+
+            switch (r->address_record->key->type) {
+                case AVAHI_DNS_TYPE_A:
+                    a.proto = AVAHI_PROTO_INET;
+                    a.data.ipv4 = r->address_record->data.a.address;
+                    break;
+
+                case AVAHI_DNS_TYPE_AAAA:
+                    a.proto = AVAHI_PROTO_INET6;
+                    a.data.ipv6 = r->address_record->data.aaaa.address;
+                    break;
 
-        case AVAHI_DNS_TYPE_AAAA:
-            a.family = AF_INET6;
-            a.data.ipv6 = record->data.aaaa.address;
+                default:
+                    abort();
+            }
+
+            r->callback(r, r->interface, r->protocol, AVAHI_RESOLVER_FOUND, r->address_record->key->name, &a, r->flags, r->userdata);
             break;
 
-        default:
-            g_assert(FALSE);
+        }
+
+        case AVAHI_RESOLVER_FAILURE:
+
+            r->callback(r, r->interface, r->protocol, event, r->host_name, NULL, r->flags, r->userdata);
+            break;
     }
+}
 
-    r->callback(r, interface, protocol, event, record->key->name, &a, r->userdata);
+static void time_event_callback(AvahiTimeEvent *e, void *userdata) {
+    AvahiSHostNameResolver *r = userdata;
+
+    assert(e);
+    assert(r);
+
+    avahi_server_set_errno(r->server, AVAHI_ERR_TIMEOUT);
+    finish(r, AVAHI_RESOLVER_FAILURE);
+}
+
+static void start_timeout(AvahiSHostNameResolver *r) {
+    struct timeval tv;
+    assert(r);
+
+    if (r->time_event)
+        return;
+
+    avahi_elapse_time(&tv, TIMEOUT_MSEC, 0);
+
+    r->time_event = avahi_time_event_new(r->server->time_event_queue, &tv, time_event_callback, r);
 }
 
-AvahiHostNameResolver *avahi_host_name_resolver_new(AvahiServer *s, gint interface, guchar protocol, const gchar *host_name, AvahiHostNameResolverCallback callback, gpointer userdata) {
-    AvahiHostNameResolver *r;
+static void record_browser_callback(
+    AvahiSRecordBrowser*rr,
+    AvahiIfIndex interface,
+    AvahiProtocol protocol,
+    AvahiBrowserEvent event,
+    AvahiRecord *record,
+    AvahiLookupResultFlags flags,
+    void* userdata) {
+
+    AvahiSHostNameResolver *r = userdata;
+
+    assert(rr);
+    assert(r);
+
+
+    switch (event) {
+        case AVAHI_BROWSER_NEW:
+            assert(record);
+            assert(record->key->type == AVAHI_DNS_TYPE_A || record->key->type == AVAHI_DNS_TYPE_AAAA);
+
+            if (r->interface > 0 && interface != r->interface)
+                return;
+
+            if (r->protocol != AVAHI_PROTO_UNSPEC && protocol != r->protocol)
+                return;
+
+            if (r->interface <= 0)
+                r->interface = interface;
+
+            if (r->protocol == AVAHI_PROTO_UNSPEC)
+                r->protocol = protocol;
+
+            if (!r->address_record) {
+                r->address_record = avahi_record_ref(record);
+                r->flags = flags;
+
+                finish(r, AVAHI_RESOLVER_FOUND);
+            }
+
+            break;
+
+        case AVAHI_BROWSER_REMOVE:
+            assert(record);
+            assert(record->key->type == AVAHI_DNS_TYPE_A || record->key->type == AVAHI_DNS_TYPE_AAAA);
+
+            if (r->address_record && avahi_record_equal_no_ttl(record, r->address_record)) {
+                avahi_record_unref(r->address_record);
+                r->address_record = NULL;
+
+                r->flags = flags;
+
+
+                /** Look for a replacement */
+                if (r->record_browser_aaaa)
+                    avahi_s_record_browser_restart(r->record_browser_aaaa);
+                if (r->record_browser_a)
+                    avahi_s_record_browser_restart(r->record_browser_a);
+
+                start_timeout(r);
+            }
+
+            break;
+
+        case AVAHI_BROWSER_CACHE_EXHAUSTED:
+        case AVAHI_BROWSER_ALL_FOR_NOW:
+            /* Ignore */
+            break;
+
+        case AVAHI_BROWSER_FAILURE:
+
+            /* Stop browsers */
+
+            if (r->record_browser_aaaa)
+                avahi_s_record_browser_free(r->record_browser_aaaa);
+            if (r->record_browser_a)
+                avahi_s_record_browser_free(r->record_browser_a);
+
+            r->record_browser_a = r->record_browser_aaaa = NULL;
+            r->flags = flags;
+
+            finish(r, AVAHI_RESOLVER_FAILURE);
+            break;
+    }
+}
+
+AvahiSHostNameResolver *avahi_s_host_name_resolver_new(
+    AvahiServer *server,
+    AvahiIfIndex interface,
+    AvahiProtocol protocol,
+    const char *host_name,
+    AvahiProtocol aprotocol,
+    AvahiLookupFlags flags,
+    AvahiSHostNameResolverCallback callback,
+    void* userdata) {
+
+    AvahiSHostNameResolver *r;
     AvahiKey *k;
 
-    g_assert(s);
-    g_assert(host_name);
-    g_assert(callback);
+    assert(server);
+    assert(host_name);
+    assert(callback);
+
+    AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
+    AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
+    AVAHI_CHECK_VALIDITY_RETURN_NULL(server, avahi_is_valid_fqdn(host_name), AVAHI_ERR_INVALID_HOST_NAME);
+    AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_PROTO_VALID(aprotocol), AVAHI_ERR_INVALID_PROTOCOL);
+    AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_FLAGS_VALID(flags, AVAHI_LOOKUP_USE_WIDE_AREA|AVAHI_LOOKUP_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
 
-    r = g_new(AvahiHostNameResolver, 1);
-    r->server = s;
-    r->host_name = avahi_normalize_name(host_name);
+    if (!(r = avahi_new(AvahiSHostNameResolver, 1))) {
+        avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
+        return NULL;
+    }
+
+    r->server = server;
+    r->host_name = avahi_normalize_name_strdup(host_name);
     r->callback = callback;
     r->userdata = userdata;
+    r->address_record = NULL;
+    r->interface = interface;
+    r->protocol = protocol;
+    r->flags = 0;
+
+    r->record_browser_a = r->record_browser_aaaa = NULL;
 
-    k = avahi_key_new(host_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A);
-    r->record_resolver_a = avahi_record_resolver_new(s, interface, protocol, k, record_resolver_callback, r);
-    avahi_key_unref(k);
+    r->time_event = NULL;
+
+    AVAHI_LLIST_PREPEND(AvahiSHostNameResolver, resolver, server->host_name_resolvers, r);
+
+    r->record_browser_aaaa = r->record_browser_a = NULL;
+
+    if (aprotocol == AVAHI_PROTO_INET || aprotocol == AVAHI_PROTO_UNSPEC) {
+        k = avahi_key_new(host_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A);
+        r->record_browser_a = avahi_s_record_browser_new(server, interface, protocol, k, flags, record_browser_callback, r);
+        avahi_key_unref(k);
+
+        if (!r->record_browser_a)
+            goto fail;
+    }
 
-    k = avahi_key_new(host_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA);
-    r->record_resolver_aaaa = avahi_record_resolver_new(s, interface, protocol, k, record_resolver_callback, r);
-    avahi_key_unref(k);
+    if (aprotocol == AVAHI_PROTO_INET6 || aprotocol == AVAHI_PROTO_UNSPEC) {
+        k = avahi_key_new(host_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA);
+        r->record_browser_aaaa = avahi_s_record_browser_new(server, interface, protocol, k, flags, record_browser_callback, r);
+        avahi_key_unref(k);
+
+        if (!r->record_browser_aaaa)
+            goto fail;
+    }
+
+    assert(r->record_browser_aaaa || r->record_browser_a);
+
+    start_timeout(r);
 
-    AVAHI_LLIST_PREPEND(AvahiHostNameResolver, resolver, s->host_name_resolvers, r);
-    
     return r;
+
+fail:
+    avahi_s_host_name_resolver_free(r);
+    return NULL;
 }
 
-void avahi_host_name_resolver_free(AvahiHostNameResolver *r) {
-    g_assert(r);
+void avahi_s_host_name_resolver_free(AvahiSHostNameResolver *r) {
+    assert(r);
+
+    AVAHI_LLIST_REMOVE(AvahiSHostNameResolver, resolver, r->server->host_name_resolvers, r);
+
+    if (r->record_browser_a)
+        avahi_s_record_browser_free(r->record_browser_a);
+
+    if (r->record_browser_aaaa)
+        avahi_s_record_browser_free(r->record_browser_aaaa);
+
+    if (r->time_event)
+        avahi_time_event_free(r->time_event);
 
-    AVAHI_LLIST_REMOVE(AvahiHostNameResolver, resolver, r->server->host_name_resolvers, r);
+    if (r->address_record)
+        avahi_record_unref(r->address_record);
 
-    avahi_record_resolver_free(r->record_resolver_a);
-    avahi_record_resolver_free(r->record_resolver_aaaa);
-    g_free(r->host_name);
-    g_free(r);
+    avahi_free(r->host_name);
+    avahi_free(r);
 }