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-rw-r--r--src/gsm/gsm0808_utils.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/src/gsm/gsm0808_utils.c b/src/gsm/gsm0808_utils.c
index 364a04fe..7416d8f5 100644
--- a/src/gsm/gsm0808_utils.c
+++ b/src/gsm/gsm0808_utils.c
@@ -767,6 +767,27 @@ int gsm0808_dec_encrypt_info(struct gsm0808_encrypt_info *ei,
return (int)(elem - old_elem);
}
+/* Return the size of the value part of a cell identifier of given type */
+int gsm0808_cell_id_size(enum CELL_IDENT discr)
+{
+ switch (discr) {
+ case CELL_IDENT_WHOLE_GLOBAL:
+ return 7;
+ case CELL_IDENT_LAC_AND_CI:
+ return 4;
+ case CELL_IDENT_CI:
+ return 2;
+ case CELL_IDENT_LAI_AND_LAC:
+ return 5;
+ case CELL_IDENT_LAC:
+ return 2;
+ case CELL_IDENT_BSS:
+ case CELL_IDENT_NO_CELL:
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
/*! Decode a single GSM 08.08 Cell ID list element payload
* \param[out] out caller-provided output union
* \param[in] discr Cell ID discriminator describing type to be decoded