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From 6f0aa79c3e8dd93e723f29bf46e1b8b14403254f Mon Sep 17 00:00:00 2001
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From: Sumit Bose <sbose@redhat.com>
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Date: Mon, 5 Dec 2016 18:25:44 +0100
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Subject: [PATCH] Kerberos: fall back to tcp SRV lookup
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---
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service/realm-kerberos-provider.c | 48 +++++++++++++++++++++++++++++++--------
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1 file changed, 39 insertions(+), 9 deletions(-)
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diff --git a/service/realm-kerberos-provider.c b/service/realm-kerberos-provider.c
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index 2b3a0f8..1477ae8 100644
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--- a/service/realm-kerberos-provider.c
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+++ b/service/realm-kerberos-provider.c
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@@ -19,6 +19,7 @@
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#include "realm-kerberos-provider.h"
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#include <errno.h>
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+#include <string.h>
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struct _RealmKerberosProvider {
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RealmProvider parent;
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@@ -38,28 +39,54 @@ realm_kerberos_provider_init (RealmKerberosProvider *self)
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}
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+typedef struct {
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+ gchar *name;
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+ const char *prot;
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+} NameProtPair;
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+
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+static void
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+name_prot_pair_free (gpointer data)
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+{
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+ NameProtPair *name_prot_pair = data;
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+ g_free (name_prot_pair->name);
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+ g_free (name_prot_pair);
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+}
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+
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static void
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on_kerberos_discover (GObject *source,
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GAsyncResult *result,
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gpointer user_data)
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{
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GTask *task = G_TASK (user_data);
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- const gchar *domain = g_task_get_task_data (task);
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+ NameProtPair *name_prot_pair = g_task_get_task_data (task);
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GError *error = NULL;
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RealmDisco *disco;
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GList *targets;
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+ GResolver *resolver;
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targets = g_resolver_lookup_service_finish (G_RESOLVER (source), result, &error);
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if (targets) {
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g_list_free_full (targets, (GDestroyNotify)g_srv_target_free);
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- disco = realm_disco_new (domain);
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- disco->kerberos_realm = g_ascii_strup (domain, -1);
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+ disco = realm_disco_new (name_prot_pair->name);
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+ disco->kerberos_realm = g_ascii_strup (name_prot_pair->name, -1);
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g_task_return_pointer (task, disco, realm_disco_unref);
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} else if (error) {
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- g_debug ("Resolving %s failed: %s", domain, error->message);
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+ g_debug ("Resolving %s failed: %s", name_prot_pair->name, error->message);
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g_error_free (error);
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- g_task_return_pointer (task, NULL, NULL);
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+
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+ if (strcmp (name_prot_pair->prot, "tcp") == 0) {
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+ g_task_return_pointer (task, NULL, NULL);
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+ } else {
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+ /* Try tcp */
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+ name_prot_pair->prot = "tcp";
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+ resolver = g_resolver_get_default ();
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+ g_resolver_lookup_service_async (resolver, "kerberos", name_prot_pair->prot,
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+ name_prot_pair->name,
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+ g_task_get_cancellable (task),
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+ on_kerberos_discover, g_object_ref (task));
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+ g_object_unref (resolver);
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+ }
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}
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g_object_unref (task);
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@@ -76,7 +103,7 @@ realm_kerberos_provider_discover_async (RealmProvider *provider,
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GTask *task;
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const gchar *software;
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GResolver *resolver;
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- gchar *name;
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+ NameProtPair *name_prot_pair;
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task = g_task_new (provider, NULL, callback, user_data);
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@@ -86,12 +113,15 @@ realm_kerberos_provider_discover_async (RealmProvider *provider,
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g_task_return_pointer (task, NULL, NULL);
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} else {
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- name = g_hostname_to_ascii (string);
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+ name_prot_pair = g_new0 (NameProtPair, 1);
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+ name_prot_pair->name = g_hostname_to_ascii (string);
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+ name_prot_pair->prot = "udp";
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resolver = g_resolver_get_default ();
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- g_resolver_lookup_service_async (resolver, "kerberos", "udp", name,
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+ g_resolver_lookup_service_async (resolver, "kerberos", name_prot_pair->prot,
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+ name_prot_pair->name,
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realm_invocation_get_cancellable (invocation),
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on_kerberos_discover, g_object_ref (task));
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- g_task_set_task_data (task, name, g_free);
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+ g_task_set_task_data (task, name_prot_pair, name_prot_pair_free);
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g_object_unref (resolver);
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}
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--
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2.9.3
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