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-rw-r--r--openssl/crypto/bio/bio.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/openssl/crypto/bio/bio.h b/openssl/crypto/bio/bio.h
index 152802fbd..ab47abcf1 100644
--- a/openssl/crypto/bio/bio.h
+++ b/openssl/crypto/bio/bio.h
@@ -306,6 +306,15 @@ DECLARE_STACK_OF(BIO)
typedef struct bio_f_buffer_ctx_struct
{
+ /* Buffers are setup like this:
+ *
+ * <---------------------- size ----------------------->
+ * +---------------------------------------------------+
+ * | consumed | remaining | free space |
+ * +---------------------------------------------------+
+ * <-- off --><------- len ------->
+ */
+
/* BIO *bio; */ /* this is now in the BIO struct */
int ibuf_size; /* how big is the input buffer */
int obuf_size; /* how big is the output buffer */