Issue-ID: SIM-18

[sim/e2-interface.git] / e2sim / e2apv1sim / ricsim / ASN1c / ber_tlv_length.h

diff --git a/e2sim/e2apv1sim/ricsim/ASN1c/ber_tlv_length.h b/e2sim/e2apv1sim/ricsim/ASN1c/ber_tlv_length.h
new file mode 100644 (file)
index 0000000..d1e4d48
--- /dev/null
+++ b/e2sim/e2apv1sim/ricsim/ASN1c/ber_tlv_length.h
@@ -0,0 +1,50 @@
+/*-
+ * Copyright (c) 2003-2017 Lev Walkin <vlm@lionet.info>. All rights reserved.
+ * Redistribution and modifications are permitted subject to BSD license.
+ */
+#ifndef        _BER_TLV_LENGTH_H_
+#define        _BER_TLV_LENGTH_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef ssize_t ber_tlv_len_t;
+
+/*
+ * This function tries to fetch the length of the BER TLV value and place it
+ * in *len_r.
+ * RETURN VALUES:
+ *      0:     More data expected than bufptr contains.
+ *     -1:     Fatal error deciphering length.
+ *     >0:     Number of bytes used from bufptr.
+ * On return with >0, len_r is constrained as -1..MAX, where -1 mean
+ * that the value is of indefinite length.
+ */
+ssize_t ber_fetch_length(int _is_constructed, const void *bufptr, size_t size,
+       ber_tlv_len_t *len_r);
+
+/*
+ * This function expects bufptr to be positioned over L in TLV.
+ * It returns number of bytes occupied by L and V together, suitable
+ * for skipping. The function properly handles indefinite length.
+ * RETURN VALUES:
+ *     Standard {-1,0,>0} convention.
+ */
+ssize_t ber_skip_length(
+       const struct asn_codec_ctx_s *opt_codec_ctx,    /* optional context */
+       int _is_constructed, const void *bufptr, size_t size);
+
+/*
+ * This function serializes the length (L from TLV) in DER format.
+ * It always returns number of bytes necessary to represent the length,
+ * it is a caller's responsibility to check the return value
+ * against the supplied buffer's size.
+ */
+size_t der_tlv_length_serialize(ber_tlv_len_t len, void *bufptr, size_t size);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _BER_TLV_LENGTH_H_ */