+ return NT_STATUS_OK;
+
+ cancel:
+ if (db->transaction_cancel(db) != 0) {
+ smb_panic("transaction_cancel failed");
+ }
+ return status;
+}
+
+
+/* -- ldb->tdb switching code -------------------------------------------- */
+
+/* change this if the data format ever changes */
+#define LTDB_PACKING_FORMAT 0x26011967
+
+/* old packing formats (not supported for now,
+ * it was never used for group mapping AFAIK) */
+#define LTDB_PACKING_FORMAT_NODN 0x26011966
+
+static unsigned int pull_uint32(uint8_t *p, int ofs)
+{
+ p += ofs;
+ return p[0] | (p[1]<<8) | (p[2]<<16) | (p[3]<<24);
+}
+
+/*
+ unpack a ldb message from a linear buffer in TDB_DATA
+*/
+static int convert_ldb_record(TDB_CONTEXT *ltdb, TDB_DATA key,
+ TDB_DATA data, void *ptr)
+{
+ TALLOC_CTX *tmp_ctx = talloc_tos();
+ GROUP_MAP map;
+ uint8_t *p;
+ uint32_t format;
+ uint32_t num_el;
+ unsigned int remaining;
+ unsigned int i, j;
+ size_t len;
+ char *name;
+ char *val;
+ char *q;
+ uint32_t num_mem = 0;
+ struct dom_sid *members = NULL;
+
+ p = (uint8_t *)data.dptr;
+ if (data.dsize < 8) {
+ errno = EIO;
+ goto failed;
+ }
+
+ format = pull_uint32(p, 0);
+ num_el = pull_uint32(p, 4);
+ p += 8;
+
+ remaining = data.dsize - 8;
+
+ switch (format) {
+ case LTDB_PACKING_FORMAT:
+ len = strnlen((char *)p, remaining);
+ if (len == remaining) {
+ errno = EIO;
+ goto failed;
+ }
+
+ if (*p == '@') {
+ /* ignore special LDB attributes */
+ return 0;
+ }
+
+ if (strncmp((char *)p, "rid=", 4)) {
+ /* unknown entry, ignore */
+ DEBUG(3, ("Found unknown entry in group mapping "
+ "database named [%s]\n", (char *)p));
+ return 0;
+ }
+
+ remaining -= len + 1;
+ p += len + 1;
+ break;
+
+ case LTDB_PACKING_FORMAT_NODN:
+ default:
+ errno = EIO;
+ goto failed;
+ }
+
+ if (num_el == 0) {
+ /* bad entry, ignore */
+ return 0;
+ }
+
+ if (num_el > remaining / 6) {
+ errno = EIO;
+ goto failed;
+ }
+
+ ZERO_STRUCT(map);
+
+ for (i = 0; i < num_el; i++) {
+ uint32_t num_vals;
+
+ if (remaining < 10) {
+ errno = EIO;
+ goto failed;
+ }
+ len = strnlen((char *)p, remaining - 6);
+ if (len == remaining - 6) {
+ errno = EIO;
+ goto failed;
+ }
+ name = talloc_strndup(tmp_ctx, (char *)p, len);
+ if (name == NULL) {
+ errno = ENOMEM;
+ goto failed;
+ }
+ remaining -= len + 1;
+ p += len + 1;
+
+ num_vals = pull_uint32(p, 0);
+ if (strcasecmp_m(name, "member") == 0) {
+ num_mem = num_vals;
+ members = talloc_array(tmp_ctx, struct dom_sid, num_mem);
+ if (members == NULL) {
+ errno = ENOMEM;
+ goto failed;
+ }
+ } else if (num_vals != 1) {
+ errno = EIO;
+ goto failed;
+ }
+
+ p += 4;
+ remaining -= 4;
+
+ for (j = 0; j < num_vals; j++) {
+ len = pull_uint32(p, 0);
+ if (len > remaining-5) {
+ errno = EIO;
+ goto failed;
+ }
+
+ val = talloc_strndup(tmp_ctx, (char *)(p + 4), len);
+ if (val == NULL) {
+ errno = ENOMEM;
+ goto failed;
+ }
+
+ remaining -= len+4+1;
+ p += len+4+1;
+
+ /* we ignore unknown or uninteresting attributes
+ * (objectclass, etc.) */
+ if (strcasecmp_m(name, "gidNumber") == 0) {
+ map.gid = strtoul(val, &q, 10);
+ if (*q) {
+ errno = EIO;
+ goto failed;
+ }
+ } else if (strcasecmp_m(name, "sid") == 0) {
+ if (!string_to_sid(&map.sid, val)) {
+ errno = EIO;
+ goto failed;
+ }
+ } else if (strcasecmp_m(name, "sidNameUse") == 0) {
+ map.sid_name_use = strtoul(val, &q, 10);
+ if (*q) {
+ errno = EIO;
+ goto failed;
+ }
+ } else if (strcasecmp_m(name, "ntname") == 0) {
+ strlcpy(map.nt_name, val,
+ sizeof(map.nt_name));
+ } else if (strcasecmp_m(name, "comment") == 0) {
+ strlcpy(map.comment, val,
+ sizeof(map.comment));
+ } else if (strcasecmp_m(name, "member") == 0) {
+ if (!string_to_sid(&members[j], val)) {
+ errno = EIO;
+ goto failed;
+ }
+ }
+
+ TALLOC_FREE(val);
+ }
+
+ TALLOC_FREE(name);
+ }
+
+ if (!add_mapping_entry(&map, 0)) {
+ errno = EIO;
+ goto failed;
+ }
+
+ if (num_mem) {
+ for (j = 0; j < num_mem; j++) {
+ NTSTATUS status;
+ status = add_aliasmem(&map.sid, &members[j]);
+ if (!NT_STATUS_IS_OK(status)) {
+ errno = EIO;
+ goto failed;
+ }
+ }
+ }
+
+ if (remaining != 0) {
+ DEBUG(0, ("Errror: %d bytes unread in ltdb_unpack_data\n",
+ remaining));
+ }
+
+ return 0;
+
+failed:
+ return -1;