| /* |
| * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include <stdio.h> |
| #include <errno.h> |
| #include "bio_local.h" |
| #include "internal/cryptlib.h" |
| |
| static int null_write(BIO *h, const char *buf, int num); |
| static int null_read(BIO *h, char *buf, int size); |
| static int null_puts(BIO *h, const char *str); |
| static int null_gets(BIO *h, char *str, int size); |
| static long null_ctrl(BIO *h, int cmd, long arg1, void *arg2); |
| static const BIO_METHOD null_method = { |
| BIO_TYPE_NULL, |
| "NULL", |
| bwrite_conv, |
| null_write, |
| bread_conv, |
| null_read, |
| null_puts, |
| null_gets, |
| null_ctrl, |
| NULL, |
| NULL, |
| NULL, /* null_callback_ctrl */ |
| }; |
| |
| const BIO_METHOD *BIO_s_null(void) |
| { |
| return &null_method; |
| } |
| |
| static int null_read(BIO *b, char *out, int outl) |
| { |
| return 0; |
| } |
| |
| static int null_write(BIO *b, const char *in, int inl) |
| { |
| return inl; |
| } |
| |
| static long null_ctrl(BIO *b, int cmd, long num, void *ptr) |
| { |
| long ret = 1; |
| |
| switch (cmd) { |
| case BIO_CTRL_RESET: |
| case BIO_CTRL_EOF: |
| case BIO_CTRL_SET: |
| case BIO_CTRL_SET_CLOSE: |
| case BIO_CTRL_FLUSH: |
| case BIO_CTRL_DUP: |
| ret = 1; |
| break; |
| case BIO_CTRL_GET_CLOSE: |
| case BIO_CTRL_INFO: |
| case BIO_CTRL_GET: |
| case BIO_CTRL_PENDING: |
| case BIO_CTRL_WPENDING: |
| default: |
| ret = 0; |
| break; |
| } |
| return ret; |
| } |
| |
| static int null_gets(BIO *bp, char *buf, int size) |
| { |
| return 0; |
| } |
| |
| static int null_puts(BIO *bp, const char *str) |
| { |
| if (str == NULL) |
| return 0; |
| return strlen(str); |
| } |