| /* |
| * Copyright (c) 2017 Lev Walkin <vlm@lionet.info>. All rights reserved. |
| * Redistribution and modifications are permitted subject to BSD license. |
| */ |
| #include <asn_internal.h> |
| |
| /* |
| * The OER decoder of any type. |
| */ |
| asn_dec_rval_t |
| oer_decode(asn_codec_ctx_t *opt_codec_ctx, |
| asn_TYPE_descriptor_t *type_descriptor, |
| void **struct_ptr, const void *ptr, size_t size) { |
| asn_codec_ctx_t s_codec_ctx; |
| |
| /* |
| * Stack checker requires that the codec context |
| * must be allocated on the stack. |
| */ |
| if(opt_codec_ctx) { |
| if(opt_codec_ctx->max_stack_size) { |
| s_codec_ctx = *opt_codec_ctx; |
| opt_codec_ctx = &s_codec_ctx; |
| } |
| } else { |
| /* If context is not given, be security-conscious anyway */ |
| memset(&s_codec_ctx, 0, sizeof(s_codec_ctx)); |
| s_codec_ctx.max_stack_size = ASN__DEFAULT_STACK_MAX; |
| opt_codec_ctx = &s_codec_ctx; |
| } |
| |
| /* |
| * Invoke type-specific decoder. |
| */ |
| return type_descriptor->oer_decoder(opt_codec_ctx, type_descriptor, 0, |
| struct_ptr, /* Pointer to the destination structure */ |
| ptr, size /* Buffer and its size */ |
| ); |
| } |