added stack control to PER
diff --git a/skeletons/per_decoder.c b/skeletons/per_decoder.c
index 55c04cb..506ad67 100644
--- a/skeletons/per_decoder.c
+++ b/skeletons/per_decoder.c
@@ -1,2 +1,38 @@
#include <asn_application.h>
+#include <asn_internal.h>
#include <per_decoder.h>
+
+asn_dec_rval_t
+uper_decode(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td, void **sptr, const void *buffer, size_t size) {
+ asn_codec_ctx_t s_codec_ctx;
+ asn_per_data_t pd;
+
+ /*
+ * 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;
+ }
+
+ /* Fill in the position indicator */
+ pd.buffer = (const uint8_t *)buffer;
+ pd.nboff = 0;
+ pd.nbits = 8 * size; /* 8 is CHAR_BIT from <limits.h> */
+
+ /*
+ * Invoke type-specific decoder.
+ */
+ if(!td->uper_decoder)
+ _ASN_DECODE_FAILED; /* PER is not compiled in */
+ return td->uper_decoder(opt_codec_ctx, td, 0, sptr, &pd);
+}
+