remove libasn1c dependency and use asn1c without libasn1c
TODO: re-introduce talloc integration for asn1 runtime
Change-Id: I2140509c5359727f304470249be2a726b9a8deb1
diff --git a/include/osmocom/rspro/asn_codecs.h b/include/osmocom/rspro/asn_codecs.h
new file mode 100644
index 0000000..e560014
--- /dev/null
+++ b/include/osmocom/rspro/asn_codecs.h
@@ -0,0 +1,109 @@
+/*-
+ * Copyright (c) 2003, 2004, 2005 Lev Walkin <vlm@lionet.info>.
+ * All rights reserved.
+ * Redistribution and modifications are permitted subject to BSD license.
+ */
+#ifndef _ASN_CODECS_H_
+#define _ASN_CODECS_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct asn_TYPE_descriptor_s; /* Forward declaration */
+
+/*
+ * This structure defines a set of parameters that may be passed
+ * to every ASN.1 encoder or decoder function.
+ * WARNING: if max_stack_size member is set, and you are calling the
+ * function pointers of the asn_TYPE_descriptor_t directly,
+ * this structure must be ALLOCATED ON THE STACK!
+ * If you can't always satisfy this requirement, use ber_decode(),
+ * xer_decode() and uper_decode() functions instead.
+ */
+typedef struct asn_codec_ctx_s {
+ /*
+ * Limit the decoder routines to use no (much) more stack than a given
+ * number of bytes. Most of decoders are stack-based, and this
+ * would protect against stack overflows if the number of nested
+ * encodings is high.
+ * The OCTET STRING, BIT STRING and ANY BER decoders are heap-based,
+ * and are safe from this kind of overflow.
+ * A value from getrlimit(RLIMIT_STACK) may be used to initialize
+ * this variable. Be careful in multithreaded environments, as the
+ * stack size is rather limited.
+ */
+ size_t max_stack_size; /* 0 disables stack bounds checking */
+} asn_codec_ctx_t;
+
+/*
+ * Type of the return value of the encoding functions (der_encode, xer_encode).
+ */
+typedef struct asn_enc_rval_s {
+ /*
+ * Number of bytes encoded.
+ * -1 indicates failure to encode the structure.
+ * In this case, the members below this one are meaningful.
+ */
+ ssize_t encoded;
+
+ /*
+ * Members meaningful when (encoded == -1), for post mortem analysis.
+ */
+
+ /* Type which cannot be encoded */
+ struct asn_TYPE_descriptor_s *failed_type;
+
+ /* Pointer to the structure of that type */
+ void *structure_ptr;
+} asn_enc_rval_t;
+#define _ASN_ENCODE_FAILED do { \
+ asn_enc_rval_t tmp_error; \
+ tmp_error.encoded = -1; \
+ tmp_error.failed_type = td; \
+ tmp_error.structure_ptr = sptr; \
+ ASN_DEBUG("Failed to encode element %s", td ? td->name : ""); \
+ return tmp_error; \
+} while(0)
+#define _ASN_ENCODED_OK(rval) do { \
+ rval.structure_ptr = 0; \
+ rval.failed_type = 0; \
+ return rval; \
+} while(0)
+
+/*
+ * Type of the return value of the decoding functions (ber_decode, xer_decode)
+ *
+ * Please note that the number of consumed bytes is ALWAYS meaningful,
+ * even if code==RC_FAIL. This is to indicate the number of successfully
+ * decoded bytes, hence providing a possibility to fail with more diagnostics
+ * (i.e., print the offending remainder of the buffer).
+ */
+enum asn_dec_rval_code_e {
+ RC_OK, /* Decoded successfully */
+ RC_WMORE, /* More data expected, call again */
+ RC_FAIL /* Failure to decode data */
+};
+typedef struct asn_dec_rval_s {
+ enum asn_dec_rval_code_e code; /* Result code */
+ size_t consumed; /* Number of bytes consumed */
+} asn_dec_rval_t;
+#define _ASN_DECODE_FAILED do { \
+ asn_dec_rval_t tmp_error; \
+ tmp_error.code = RC_FAIL; \
+ tmp_error.consumed = 0; \
+ ASN_DEBUG("Failed to decode element %s", td ? td->name : ""); \
+ return tmp_error; \
+} while(0)
+#define _ASN_DECODE_STARVED do { \
+ asn_dec_rval_t tmp_error; \
+ tmp_error.code = RC_WMORE; \
+ tmp_error.consumed = 0; \
+ return tmp_error; \
+} while(0)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ASN_CODECS_H_ */