bio_cb.c revision 325335 
1/* crypto/bio/bio_cb.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to.  The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 *    notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 *    notice, this list of conditions and the following disclaimer in the
30 *    documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 *    must display the following acknowledgement:
33 *    "This product includes cryptographic software written by
34 *     Eric Young (eay@cryptsoft.com)"
35 *    The word 'cryptographic' can be left out if the rouines from the library
36 *    being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 *    the apps directory (application code) you must include an acknowledgement:
39 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include <string.h>
61#include <stdlib.h>
62#include "cryptlib.h"
63#include <openssl/bio.h>
64#include <openssl/err.h>
65
66long MS_CALLBACK BIO_debug_callback(BIO *bio, int cmd, const char *argp,
67                                    int argi, long argl, long ret)
68{
69    BIO *b;
70    MS_STATIC char buf[256];
71    char *p;
72    long r = 1;
73    int len;
74    size_t p_maxlen;
75
76    if (BIO_CB_RETURN & cmd)
77        r = ret;
78
79    len = BIO_snprintf(buf,sizeof buf,"BIO[%p]: ",(void *)bio);
80
81    /* Ignore errors and continue printing the other information. */
82    if (len < 0)
83        len = 0;
84    p = buf + len;
85    p_maxlen = sizeof(buf) - len;
86
87    switch (cmd) {
88    case BIO_CB_FREE:
89        BIO_snprintf(p, p_maxlen, "Free - %s\n", bio->method->name);
90        break;
91    case BIO_CB_READ:
92        if (bio->method->type & BIO_TYPE_DESCRIPTOR)
93            BIO_snprintf(p, p_maxlen, "read(%d,%lu) - %s fd=%d\n",
94                         bio->num, (unsigned long)argi,
95                         bio->method->name, bio->num);
96        else
97            BIO_snprintf(p, p_maxlen, "read(%d,%lu) - %s\n",
98                         bio->num, (unsigned long)argi, bio->method->name);
99        break;
100    case BIO_CB_WRITE:
101        if (bio->method->type & BIO_TYPE_DESCRIPTOR)
102            BIO_snprintf(p, p_maxlen, "write(%d,%lu) - %s fd=%d\n",
103                         bio->num, (unsigned long)argi,
104                         bio->method->name, bio->num);
105        else
106            BIO_snprintf(p, p_maxlen, "write(%d,%lu) - %s\n",
107                         bio->num, (unsigned long)argi, bio->method->name);
108        break;
109    case BIO_CB_PUTS:
110        BIO_snprintf(p, p_maxlen, "puts() - %s\n", bio->method->name);
111        break;
112    case BIO_CB_GETS:
113        BIO_snprintf(p, p_maxlen, "gets(%lu) - %s\n", (unsigned long)argi,
114                     bio->method->name);
115        break;
116    case BIO_CB_CTRL:
117        BIO_snprintf(p, p_maxlen, "ctrl(%lu) - %s\n", (unsigned long)argi,
118                     bio->method->name);
119        break;
120    case BIO_CB_RETURN | BIO_CB_READ:
121        BIO_snprintf(p, p_maxlen, "read return %ld\n", ret);
122        break;
123    case BIO_CB_RETURN | BIO_CB_WRITE:
124        BIO_snprintf(p, p_maxlen, "write return %ld\n", ret);
125        break;
126    case BIO_CB_RETURN | BIO_CB_GETS:
127        BIO_snprintf(p, p_maxlen, "gets return %ld\n", ret);
128        break;
129    case BIO_CB_RETURN | BIO_CB_PUTS:
130        BIO_snprintf(p, p_maxlen, "puts return %ld\n", ret);
131        break;
132    case BIO_CB_RETURN | BIO_CB_CTRL:
133        BIO_snprintf(p, p_maxlen, "ctrl return %ld\n", ret);
134        break;
135    default:
136        BIO_snprintf(p, p_maxlen, "bio callback - unknown type (%d)\n", cmd);
137        break;
138    }
139
140    b = (BIO *)bio->cb_arg;
141    if (b != NULL)
142        BIO_write(b, buf, strlen(buf));
143#if !defined(OPENSSL_NO_STDIO) && !defined(OPENSSL_SYS_WIN16)
144    else
145        fputs(buf, stderr);
146#endif
147    return (r);
148}
149