Add internal min/max/next id management fucntions

Retrieve minID and maxID from domain configuration so that lower
and upper bounds can be set per domain.

Add function that keeps track of the next available id, increments
and returns it on requests, avoiding collisions with existing ids.

2 files changed, 46 insertions, 1 deletions

diff --git a/server/confdb/confdb.c b/server/confdb/confdb.c
index 4c895d5f1..f86df6ca4 100644
--- a/server/confdb/confdb.c
+++ b/server/confdb/confdb.c
@@ -333,7 +333,7 @@ int confdb_get_int(struct confdb_ctx *cdb, TALLOC_CTX *ctx,
                    int defval, int *result)
 {
     char **values;
-    long int val;
+    long val;
     int ret;
 
     ret = confdb_get_param(cdb, ctx, section, attribute, &values);
@@ -370,6 +370,43 @@ int confdb_get_int(struct confdb_ctx *cdb, TALLOC_CTX *ctx,
     return EOK;
 }
 
+long confdb_get_long(struct confdb_ctx *cdb, TALLOC_CTX *ctx,
+                     const char *section, const char *attribute,
+                     long defval, long *result)
+{
+    char **values;
+    long val;
+    int ret;
+
+    ret = confdb_get_param(cdb, ctx, section, attribute, &values);
+    if (ret != EOK) {
+        return ret;
+    }
+
+    if (values[0]) {
+        if (values[1] != NULL) {
+            /* too many values */
+            talloc_free(values);
+            return EINVAL;
+        }
+
+        errno = 0;
+        val = strtol(values[0], NULL, 0);
+        if (errno) {
+            talloc_free(values);
+            return errno;
+        }
+
+    } else {
+        val = defval;
+    }
+
+    talloc_free(values);
+
+    *result = val;
+    return EOK;
+}
+
 int confdb_get_bool(struct confdb_ctx *cdb, TALLOC_CTX *ctx,
                     const char *section, const char *attribute,
                     bool defval, bool *result)
@@ -680,6 +717,11 @@ int confdb_get_domains(struct confdb_ctx *cdb,
             domain->legacy = true;
         }
 
+        domain->id_min = ldb_msg_find_attr_as_uint(res->msgs[i],
+                                                   "minId", SSSD_MIN_ID);
+        domain->id_max = ldb_msg_find_attr_as_uint(res->msgs[i],
+                                                   "maxId", 0);
+
         ret = btreemap_set_value(mem_ctx, &domain_map,
                                  domain->name, domain,
                                  _domain_comparator);
diff --git a/server/confdb/confdb.h b/server/confdb/confdb.h
index de6790355..dbddcecfb 100644
--- a/server/confdb/confdb.h
+++ b/server/confdb/confdb.h
@@ -28,12 +28,15 @@
 #include "util/btreemap.h"
 
 #define CONFDB_FILE "config.ldb"
+#define SSSD_MIN_ID 1000
 
 struct sss_domain_info {
     char *name;
     int timeout;
     int enumerate;
     bool legacy;
+    uint32_t id_min;
+    uint32_t id_max;
 };
 
 struct confdb_ctx;