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/*
* Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
* Copyright (c) 2017, Oracle and/or its affiliates. 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 <string.h>
#include "tu_local.h"
static int tap_write_ex(BIO *b, const char *buf, size_t size, size_t *in_size);
static int tap_read_ex(BIO *b, char *buf, size_t size, size_t *out_size);
static int tap_puts(BIO *b, const char *str);
static int tap_gets(BIO *b, char *str, int size);
static long tap_ctrl(BIO *b, int cmd, long arg1, void *arg2);
static int tap_new(BIO *b);
static int tap_free(BIO *b);
static long tap_callback_ctrl(BIO *h, int cmd, BIO_info_cb *fp);
const BIO_METHOD *BIO_f_tap(void)
{
static BIO_METHOD *tap = NULL;
if (tap == NULL) {
tap = BIO_meth_new(BIO_TYPE_START | BIO_TYPE_FILTER, "tap");
if (tap != NULL) {
BIO_meth_set_write_ex(tap, tap_write_ex);
BIO_meth_set_read_ex(tap, tap_read_ex);
BIO_meth_set_puts(tap, tap_puts);
BIO_meth_set_gets(tap, tap_gets);
BIO_meth_set_ctrl(tap, tap_ctrl);
BIO_meth_set_create(tap, tap_new);
BIO_meth_set_destroy(tap, tap_free);
BIO_meth_set_callback_ctrl(tap, tap_callback_ctrl);
}
}
return tap;
}
static int tap_new(BIO *b)
{
BIO_set_data(b, NULL);
BIO_set_init(b, 1);
return 1;
}
static int tap_free(BIO *b)
{
if (b == NULL)
return 0;
BIO_set_data(b, NULL);
BIO_set_init(b, 0);
return 1;
}
static int tap_read_ex(BIO *b, char *buf, size_t size, size_t *out_size)
{
BIO *next = BIO_next(b);
int ret = 0;
ret = BIO_read_ex(next, buf, size, out_size);
BIO_clear_retry_flags(b);
BIO_copy_next_retry(b);
return ret;
}
/*
* Output a string to the specified bio and return 1 if successful.
*/
static int write_string(BIO *b, const char *buf, size_t n)
{
size_t m;
return BIO_write_ex(b, buf, n, &m) != 0 && m == n;
}
/*
* Write some data.
*
* This function implements a simple state machine that detects new lines.
* It indents the output and prefixes it with a '#' character.
*
* It returns the number of input characters that were output in in_size.
* More characters than this will likely have been output however any calling
* code will be unable to correctly assess the actual number of characters
* emitted and would be prone to failure if the actual number were returned.
*
* The BIO_data field is used as our state. If it is NULL, we've just
* seen a new line. If it is not NULL, we're processing characters in a line.
*/
static int tap_write_ex(BIO *b, const char *buf, size_t size, size_t *in_size)
{
static char empty[] = "";
BIO *next = BIO_next(b);
size_t i;
int j;
for (i = 0; i < size; i++) {
if (BIO_get_data(b) == NULL) {
BIO_set_data(b, empty);
for (j = 0; j < subtest_level(); j++)
if (!write_string(next, " ", 1))
goto err;
if (!write_string(next, "# ", 2))
goto err;
}
if (!write_string(next, buf + i, 1))
goto err;
if (buf[i] == '\n')
BIO_set_data(b, NULL);
}
*in_size = i;
return 1;
err:
*in_size = i;
return 0;
}
static long tap_ctrl(BIO *b, int cmd, long num, void *ptr)
{
BIO *next = BIO_next(b);
switch (cmd) {
case BIO_CTRL_RESET:
BIO_set_data(b, NULL);
break;
default:
break;
}
return BIO_ctrl(next, cmd, num, ptr);
}
static long tap_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
{
return BIO_callback_ctrl(BIO_next(b), cmd, fp);
}
static int tap_gets(BIO *b, char *buf, int size)
{
return BIO_gets(BIO_next(b), buf, size);
}
static int tap_puts(BIO *b, const char *str)
{
size_t m;
if (!tap_write_ex(b, str, strlen(str), &m))
return 0;
return m;
}
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