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-rw-r--r--src/isup.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/src/isup.c b/src/isup.c
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+++ b/src/isup.c
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+/*
+ * (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2010 by On-Waves
+ * All Rights Reserved
+ *
+ * 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 2 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <isup_types.h>
+#include <cellmgr_debug.h>
+
+/* this message contains the range */
+int isup_parse_grs(const uint8_t *data, uint8_t in_length)
+{
+ uint8_t ptr;
+ uint8_t length;
+
+ if (in_length > 3) {
+ LOGP(DISUP, LOGL_ERROR, "This needs three bytes.\n");
+ return -1;
+ }
+
+ ptr = data[0];
+ if (1 + ptr > in_length) {
+ LOGP(DISUP, LOGL_ERROR, "Pointing outside the packet.\n");
+ return -1;
+ }
+
+ length = data[0 + ptr];
+
+ if (1 + ptr + 1 > in_length) {
+ LOGP(DISUP, LOGL_ERROR, "No space for the data.\n");
+ return -1;
+ }
+
+ return data[0 + ptr + 1];
+}
+