Add initial failover support for ldap and ipa

The retun values are still not directly used with ldap libraries that still do
their own name resolution, but this patch introduces a very basic framework to
have a multiple providers in one domain use and share a single failover
service if they want to.

2 files changed, 89 insertions, 0 deletions

diff --git a/server/util/util.c b/server/util/util.c
new file mode 100644
index 00000000..9049602c
--- /dev/null
+++ b/server/util/util.c
@@ -0,0 +1,85 @@
+/*
+    Authors:
+        Simo Sorce <ssorce@redhat.com>
+
+    Copyright (C) 2009 Red Hat
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    This program 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "talloc.h"
+#include "util/util.h"
+
+/* Split string in a list using a set of legal seprators */
+
+int sss_split_list(TALLOC_CTX *memctx, const char *string,
+                   const char *sep, char ***_list, int *c)
+{
+    const char *p;
+    const char *s;
+    char **list;
+    char **t;
+    int i;
+
+    /* split server parm into a list */
+    list = NULL;
+    s = string;
+    i = 0;
+
+    while (s) {
+        p = strpbrk(s, sep);
+        if (p) {
+            if (p - s == 1) {
+                s++;
+                continue;
+            }
+
+            t = talloc_realloc(memctx, list, char *, i + 1);
+            if (!t) {
+                talloc_zfree(list);
+                return ENOMEM;
+            }
+            list = t;
+            list[i] = talloc_asprintf(list, "%.*s", (int)(p - s), s);
+            if (!list[i]) {
+                talloc_zfree(list);
+                return ENOMEM;
+            }
+            i++;
+
+            s = p + 1;
+        }
+        else {
+
+            t = talloc_realloc(memctx, list, char *, i + 1);
+            if (!t) {
+                talloc_zfree(list);
+                return ENOMEM;
+            }
+            list = t;
+            list[i] = talloc_strdup(list, s);
+            if (!list[i]) {
+                talloc_zfree(list);
+                return ENOMEM;
+            }
+            i++;
+
+            s = NULL;
+        }
+    }
+
+    *_list = list;
+    *c = i;
+    return EOK;
+}
diff --git a/server/util/util.h b/server/util/util.h
index 3ca43a40..b116a66a 100644
--- a/server/util/util.h
+++ b/server/util/util.h
@@ -221,4 +221,8 @@ int backup_file(const char *src, int dbglvl);
 errno_t check_and_open_readonly(const char *filename, int *fd, const uid_t uid,
                                const gid_t gid, const mode_t mode);
 
+/* from util.c */
+int sss_split_list(TALLOC_CTX *memctx, const char *string,
+                   const char *sep, char ***_list, int *c);
+
 #endif /* __SSSD_UTIL_H__ */