lib/libcrypto/bio/bio.h

   1 /* $OpenBSD: bio.h,v 1.30 2017/04/06 18:25:38 deraadt Exp $ */
   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 #ifndef HEADER_BIO_H
  60 #define HEADER_BIO_H
  61 #if !defined(HAVE_ATTRIBUTE__BOUNDED__) && !defined(__OpenBSD__)
  62 #define __bounded__(x, y, z)
  63 #endif
  64 #include <openssl/opensslconf.h>
  65
  66 # include <stdio.h>
  67 #include <stdarg.h>
  68
  69 #include <openssl/crypto.h>
  70
  71
  72 #ifdef  __cplusplus
  73 extern "C" {
  74 #endif
  75
  76 /* These are the 'types' of BIOs */
  77 #define BIO_TYPE_NONE           0
  78 #define BIO_TYPE_MEM            (1|0x0400)
  79 #define BIO_TYPE_FILE           (2|0x0400)
  80
  81 #define BIO_TYPE_FD             (4|0x0400|0x0100)
  82 #define BIO_TYPE_SOCKET         (5|0x0400|0x0100)
  83 #define BIO_TYPE_NULL           (6|0x0400)
  84 #define BIO_TYPE_SSL            (7|0x0200)
  85 #define BIO_TYPE_MD             (8|0x0200)              /* passive filter */
  86 #define BIO_TYPE_BUFFER         (9|0x0200)              /* filter */
  87 #define BIO_TYPE_CIPHER         (10|0x0200)             /* filter */
  88 #define BIO_TYPE_BASE64         (11|0x0200)             /* filter */
  89 #define BIO_TYPE_CONNECT        (12|0x0400|0x0100)      /* socket - connect */
  90 #define BIO_TYPE_ACCEPT         (13|0x0400|0x0100)      /* socket for accept */
  91 #define BIO_TYPE_PROXY_CLIENT   (14|0x0200)             /* client proxy BIO */
  92 #define BIO_TYPE_PROXY_SERVER   (15|0x0200)             /* server proxy BIO */
  93 #define BIO_TYPE_NBIO_TEST      (16|0x0200)             /* server proxy BIO */
  94 #define BIO_TYPE_NULL_FILTER    (17|0x0200)
  95 #define BIO_TYPE_BER            (18|0x0200)             /* BER -> bin filter */
  96 #define BIO_TYPE_BIO            (19|0x0400)             /* (half a) BIO pair */
  97 #define BIO_TYPE_LINEBUFFER     (20|0x0200)             /* filter */
  98 #define BIO_TYPE_DGRAM          (21|0x0400|0x0100)
  99 #define BIO_TYPE_ASN1           (22|0x0200)             /* filter */
 100 #define BIO_TYPE_COMP           (23|0x0200)             /* filter */
 101
 102 #define BIO_TYPE_DESCRIPTOR     0x0100  /* socket, fd, connect or accept */
 103 #define BIO_TYPE_FILTER         0x0200
 104 #define BIO_TYPE_SOURCE_SINK    0x0400
 105
 106 /* BIO_FILENAME_READ|BIO_CLOSE to open or close on free.
 107  * BIO_set_fp(in,stdin,BIO_NOCLOSE); */
 108 #define BIO_NOCLOSE             0x00
 109 #define BIO_CLOSE               0x01
 110
 111 /* These are used in the following macros and are passed to
 112  * BIO_ctrl() */
 113 #define BIO_CTRL_RESET          1  /* opt - rewind/zero etc */
 114 #define BIO_CTRL_EOF            2  /* opt - are we at the eof */
 115 #define BIO_CTRL_INFO           3  /* opt - extra tit-bits */
 116 #define BIO_CTRL_SET            4  /* man - set the 'IO' type */
 117 #define BIO_CTRL_GET            5  /* man - get the 'IO' type */
 118 #define BIO_CTRL_PUSH           6  /* opt - internal, used to signify change */
 119 #define BIO_CTRL_POP            7  /* opt - internal, used to signify change */
 120 #define BIO_CTRL_GET_CLOSE      8  /* man - set the 'close' on free */
 121 #define BIO_CTRL_SET_CLOSE      9  /* man - set the 'close' on free */
 122 #define BIO_CTRL_PENDING        10  /* opt - is their more data buffered */
 123 #define BIO_CTRL_FLUSH          11  /* opt - 'flush' buffered output */
 124 #define BIO_CTRL_DUP            12  /* man - extra stuff for 'duped' BIO */
 125 #define BIO_CTRL_WPENDING       13  /* opt - number of bytes still to write */
 126 /* callback is int cb(BIO *bio,state,ret); */
 127 #define BIO_CTRL_SET_CALLBACK   14  /* opt - set callback function */
 128 #define BIO_CTRL_GET_CALLBACK   15  /* opt - set callback function */
 129
 130 #define BIO_CTRL_SET_FILENAME   30      /* BIO_s_file special */
 131
 132 /* dgram BIO stuff */
 133 #define BIO_CTRL_DGRAM_CONNECT       31  /* BIO dgram special */
 134 #define BIO_CTRL_DGRAM_SET_CONNECTED 32  /* allow for an externally
 135                                           * connected socket to be
 136                                           * passed in */
 137 #define BIO_CTRL_DGRAM_SET_RECV_TIMEOUT 33 /* setsockopt, essentially */
 138 #define BIO_CTRL_DGRAM_GET_RECV_TIMEOUT 34 /* getsockopt, essentially */
 139 #define BIO_CTRL_DGRAM_SET_SEND_TIMEOUT 35 /* setsockopt, essentially */
 140 #define BIO_CTRL_DGRAM_GET_SEND_TIMEOUT 36 /* getsockopt, essentially */
 141
 142 #define BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP 37 /* flag whether the last */
 143 #define BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP 38 /* I/O operation tiemd out */
 144
 145 /* #ifdef IP_MTU_DISCOVER */
 146 #define BIO_CTRL_DGRAM_MTU_DISCOVER       39 /* set DF bit on egress packets */
 147 /* #endif */
 148
 149 #define BIO_CTRL_DGRAM_QUERY_MTU          40 /* as kernel for current MTU */
 150 #define BIO_CTRL_DGRAM_GET_FALLBACK_MTU   47
 151 #define BIO_CTRL_DGRAM_GET_MTU            41 /* get cached value for MTU */
 152 #define BIO_CTRL_DGRAM_SET_MTU            42 /* set cached value for
 153                                               * MTU. want to use this
 154                                               * if asking the kernel
 155                                               * fails */
 156
 157 #define BIO_CTRL_DGRAM_MTU_EXCEEDED       43 /* check whether the MTU
 158                                               * was exceed in the
 159                                               * previous write
 160                                               * operation */
 161
 162 #define BIO_CTRL_DGRAM_GET_PEER           46
 163 #define BIO_CTRL_DGRAM_SET_PEER           44 /* Destination for the data */
 164
 165 #define BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT   45 /* Next DTLS handshake timeout to
 166                                               * adjust socket timeouts */
 167
 168
 169 /* modifiers */
 170 #define BIO_FP_READ             0x02
 171 #define BIO_FP_WRITE            0x04
 172 #define BIO_FP_APPEND           0x08
 173 #define BIO_FP_TEXT             0x10
 174
 175 #define BIO_FLAGS_READ          0x01
 176 #define BIO_FLAGS_WRITE         0x02
 177 #define BIO_FLAGS_IO_SPECIAL    0x04
 178 #define BIO_FLAGS_RWS (BIO_FLAGS_READ|BIO_FLAGS_WRITE|BIO_FLAGS_IO_SPECIAL)
 179 #define BIO_FLAGS_SHOULD_RETRY  0x08
 180
 181 /* Used in BIO_gethostbyname() */
 182 #define BIO_GHBN_CTRL_HITS              1
 183 #define BIO_GHBN_CTRL_MISSES            2
 184 #define BIO_GHBN_CTRL_CACHE_SIZE        3
 185 #define BIO_GHBN_CTRL_GET_ENTRY         4
 186 #define BIO_GHBN_CTRL_FLUSH             5
 187
 188 /* Mostly used in the SSL BIO */
 189 /* Not used anymore
 190  * #define BIO_FLAGS_PROTOCOL_DELAYED_READ 0x10
 191  * #define BIO_FLAGS_PROTOCOL_DELAYED_WRITE 0x20
 192  * #define BIO_FLAGS_PROTOCOL_STARTUP   0x40
 193  */
 194
 195 #define BIO_FLAGS_BASE64_NO_NL  0x100
 196
 197 /* This is used with memory BIOs: it means we shouldn't free up or change the
 198  * data in any way.
 199  */
 200 #define BIO_FLAGS_MEM_RDONLY    0x200
 201
 202 typedef struct bio_st BIO;
 203
 204 void BIO_set_flags(BIO *b, int flags);
 205 int  BIO_test_flags(const BIO *b, int flags);
 206 void BIO_clear_flags(BIO *b, int flags);
 207
 208 #define BIO_get_flags(b) BIO_test_flags(b, ~(0x0))
 209 #define BIO_set_retry_special(b) \
 210                 BIO_set_flags(b, (BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY))
 211 #define BIO_set_retry_read(b) \
 212                 BIO_set_flags(b, (BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY))
 213 #define BIO_set_retry_write(b) \
 214                 BIO_set_flags(b, (BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY))
 215
 216 /* These are normally used internally in BIOs */
 217 #define BIO_clear_retry_flags(b) \
 218                 BIO_clear_flags(b, (BIO_FLAGS_RWS|BIO_FLAGS_SHOULD_RETRY))
 219 #define BIO_get_retry_flags(b) \
 220                 BIO_test_flags(b, (BIO_FLAGS_RWS|BIO_FLAGS_SHOULD_RETRY))
 221
 222 /* These should be used by the application to tell why we should retry */
 223 #define BIO_should_read(a)              BIO_test_flags(a, BIO_FLAGS_READ)
 224 #define BIO_should_write(a)             BIO_test_flags(a, BIO_FLAGS_WRITE)
 225 #define BIO_should_io_special(a)        BIO_test_flags(a, BIO_FLAGS_IO_SPECIAL)
 226 #define BIO_retry_type(a)               BIO_test_flags(a, BIO_FLAGS_RWS)
 227 #define BIO_should_retry(a)             BIO_test_flags(a, BIO_FLAGS_SHOULD_RETRY)
 228
 229 /* The next three are used in conjunction with the
 230  * BIO_should_io_special() condition.  After this returns true,
 231  * BIO *BIO_get_retry_BIO(BIO *bio, int *reason); will walk the BIO
 232  * stack and return the 'reason' for the special and the offending BIO.
 233  * Given a BIO, BIO_get_retry_reason(bio) will return the code. */
 234 /* Returned from the SSL bio when the certificate retrieval code had an error */
 235 #define BIO_RR_SSL_X509_LOOKUP          0x01
 236 /* Returned from the connect BIO when a connect would have blocked */
 237 #define BIO_RR_CONNECT                  0x02
 238 /* Returned from the accept BIO when an accept would have blocked */
 239 #define BIO_RR_ACCEPT                   0x03
 240
 241 /* These are passed by the BIO callback */
 242 #define BIO_CB_FREE     0x01
 243 #define BIO_CB_READ     0x02
 244 #define BIO_CB_WRITE    0x03
 245 #define BIO_CB_PUTS     0x04
 246 #define BIO_CB_GETS     0x05
 247 #define BIO_CB_CTRL     0x06
 248
 249 /* The callback is called before and after the underling operation,
 250  * The BIO_CB_RETURN flag indicates if it is after the call */
 251 #define BIO_CB_RETURN   0x80
 252 #define BIO_CB_return(a) ((a)|BIO_CB_RETURN))
 253 #define BIO_cb_pre(a)   (!((a)&BIO_CB_RETURN))
 254 #define BIO_cb_post(a)  ((a)&BIO_CB_RETURN)
 255
 256 long (*BIO_get_callback(const BIO *b))(struct bio_st *, int, const char *,
 257     int, long, long);
 258 void BIO_set_callback(BIO *b,
 259     long (*callback)(struct bio_st *, int, const char *, int, long, long));
 260 char *BIO_get_callback_arg(const BIO *b);
 261 void BIO_set_callback_arg(BIO *b, char *arg);
 262
 263 const char * BIO_method_name(const BIO *b);
 264 int BIO_method_type(const BIO *b);
 265
 266 typedef void bio_info_cb(struct bio_st *, int, const char *, int, long, long);
 267
 268 typedef struct bio_method_st {
 269         int type;
 270         const char *name;
 271         int (*bwrite)(BIO *, const char *, int);
 272         int (*bread)(BIO *, char *, int);
 273         int (*bputs)(BIO *, const char *);
 274         int (*bgets)(BIO *, char *, int);
 275         long (*ctrl)(BIO *, int, long, void *);
 276         int (*create)(BIO *);
 277         int (*destroy)(BIO *);
 278         long (*callback_ctrl)(BIO *, int, bio_info_cb *);
 279 } BIO_METHOD;
 280
 281 struct bio_st {
 282         BIO_METHOD *method;
 283         /* bio, mode, argp, argi, argl, ret */
 284         long (*callback)(struct bio_st *, int, const char *, int, long, long);
 285         char *cb_arg; /* first argument for the callback */
 286
 287         int init;
 288         int shutdown;
 289         int flags;      /* extra storage */
 290         int retry_reason;
 291         int num;
 292         void *ptr;
 293         struct bio_st *next_bio;        /* used by filter BIOs */
 294         struct bio_st *prev_bio;        /* used by filter BIOs */
 295         int references;
 296         unsigned long num_read;
 297         unsigned long num_write;
 298
 299         CRYPTO_EX_DATA ex_data;
 300 };
 301
 302 DECLARE_STACK_OF(BIO)
 303
 304 typedef struct bio_f_buffer_ctx_struct {
 305         /* Buffers are setup like this:
 306          *
 307          * <---------------------- size ----------------------->
 308          * +---------------------------------------------------+
 309          * | consumed | remaining          | free space        |
 310          * +---------------------------------------------------+
 311          * <-- off --><------- len ------->
 312          */
 313
 314         /* BIO *bio; */ /* this is now in the BIO struct */
 315         int ibuf_size;  /* how big is the input buffer */
 316         int obuf_size;  /* how big is the output buffer */
 317
 318         char *ibuf;     /* the char array */
 319         int ibuf_len;   /* how many bytes are in it */
 320         int ibuf_off;   /* write/read offset */
 321
 322         char *obuf;     /* the char array */
 323         int obuf_len;   /* how many bytes are in it */
 324         int obuf_off;   /* write/read offset */
 325 } BIO_F_BUFFER_CTX;
 326
 327 /* Prefix and suffix callback in ASN1 BIO */
 328 typedef int asn1_ps_func(BIO *b, unsigned char **pbuf, int *plen, void *parg);
 329
 330
 331 /* connect BIO stuff */
 332 #define BIO_CONN_S_BEFORE               1
 333 #define BIO_CONN_S_GET_IP               2
 334 #define BIO_CONN_S_GET_PORT             3
 335 #define BIO_CONN_S_CREATE_SOCKET        4
 336 #define BIO_CONN_S_CONNECT              5
 337 #define BIO_CONN_S_OK                   6
 338 #define BIO_CONN_S_BLOCKED_CONNECT      7
 339 #define BIO_CONN_S_NBIO                 8
 340 /*#define BIO_CONN_get_param_hostname   BIO_ctrl */
 341
 342 #define BIO_C_SET_CONNECT                       100
 343 #define BIO_C_DO_STATE_MACHINE                  101
 344 #define BIO_C_SET_NBIO                          102
 345 #define BIO_C_SET_PROXY_PARAM                   103
 346 #define BIO_C_SET_FD                            104
 347 #define BIO_C_GET_FD                            105
 348 #define BIO_C_SET_FILE_PTR                      106
 349 #define BIO_C_GET_FILE_PTR                      107
 350 #define BIO_C_SET_FILENAME                      108
 351 #define BIO_C_SET_SSL                           109
 352 #define BIO_C_GET_SSL                           110
 353 #define BIO_C_SET_MD                            111
 354 #define BIO_C_GET_MD                            112
 355 #define BIO_C_GET_CIPHER_STATUS                 113
 356 #define BIO_C_SET_BUF_MEM                       114
 357 #define BIO_C_GET_BUF_MEM_PTR                   115
 358 #define BIO_C_GET_BUFF_NUM_LINES                116
 359 #define BIO_C_SET_BUFF_SIZE                     117
 360 #define BIO_C_SET_ACCEPT                        118
 361 #define BIO_C_SSL_MODE                          119
 362 #define BIO_C_GET_MD_CTX                        120
 363 #define BIO_C_GET_PROXY_PARAM                   121
 364 #define BIO_C_SET_BUFF_READ_DATA                122 /* data to read first */
 365 #define BIO_C_GET_CONNECT                       123
 366 #define BIO_C_GET_ACCEPT                        124
 367 #define BIO_C_SET_SSL_RENEGOTIATE_BYTES         125
 368 #define BIO_C_GET_SSL_NUM_RENEGOTIATES          126
 369 #define BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT       127
 370 #define BIO_C_FILE_SEEK                         128
 371 #define BIO_C_GET_CIPHER_CTX                    129
 372 #define BIO_C_SET_BUF_MEM_EOF_RETURN            130/*return end of input value*/
 373 #define BIO_C_SET_BIND_MODE                     131
 374 #define BIO_C_GET_BIND_MODE                     132
 375 #define BIO_C_FILE_TELL                         133
 376 #define BIO_C_GET_SOCKS                         134
 377 #define BIO_C_SET_SOCKS                         135
 378
 379 #define BIO_C_SET_WRITE_BUF_SIZE                136/* for BIO_s_bio */
 380 #define BIO_C_GET_WRITE_BUF_SIZE                137
 381 #define BIO_C_MAKE_BIO_PAIR                     138
 382 #define BIO_C_DESTROY_BIO_PAIR                  139
 383 #define BIO_C_GET_WRITE_GUARANTEE               140
 384 #define BIO_C_GET_READ_REQUEST                  141
 385 #define BIO_C_SHUTDOWN_WR                       142
 386 #define BIO_C_NREAD0                            143
 387 #define BIO_C_NREAD                             144
 388 #define BIO_C_NWRITE0                           145
 389 #define BIO_C_NWRITE                            146
 390 #define BIO_C_RESET_READ_REQUEST                147
 391 #define BIO_C_SET_MD_CTX                        148
 392
 393 #define BIO_C_SET_PREFIX                        149
 394 #define BIO_C_GET_PREFIX                        150
 395 #define BIO_C_SET_SUFFIX                        151
 396 #define BIO_C_GET_SUFFIX                        152
 397
 398 #define BIO_C_SET_EX_ARG                        153
 399 #define BIO_C_GET_EX_ARG                        154
 400
 401 #define BIO_set_app_data(s,arg)         BIO_set_ex_data(s,0,arg)
 402 #define BIO_get_app_data(s)             BIO_get_ex_data(s,0)
 403
 404 /* BIO_s_connect() and BIO_s_socks4a_connect() */
 405 #define BIO_set_conn_hostname(b,name) BIO_ctrl(b,BIO_C_SET_CONNECT,0,(char *)name)
 406 #define BIO_set_conn_port(b,port) BIO_ctrl(b,BIO_C_SET_CONNECT,1,(char *)port)
 407 #define BIO_set_conn_ip(b,ip)     BIO_ctrl(b,BIO_C_SET_CONNECT,2,(char *)ip)
 408 #define BIO_set_conn_int_port(b,port) BIO_ctrl(b,BIO_C_SET_CONNECT,3,(char *)port)
 409 #define BIO_get_conn_hostname(b)  BIO_ptr_ctrl(b,BIO_C_GET_CONNECT,0)
 410 #define BIO_get_conn_port(b)      BIO_ptr_ctrl(b,BIO_C_GET_CONNECT,1)
 411 #define BIO_get_conn_ip(b)               BIO_ptr_ctrl(b,BIO_C_GET_CONNECT,2)
 412 #define BIO_get_conn_int_port(b) BIO_int_ctrl(b,BIO_C_GET_CONNECT,3,0)
 413
 414
 415 #define BIO_set_nbio(b,n)       BIO_ctrl(b,BIO_C_SET_NBIO,(n),NULL)
 416
 417 /* BIO_s_accept_socket() */
 418 #define BIO_set_accept_port(b,name) BIO_ctrl(b,BIO_C_SET_ACCEPT,0,(char *)name)
 419 #define BIO_get_accept_port(b)  BIO_ptr_ctrl(b,BIO_C_GET_ACCEPT,0)
 420 /* #define BIO_set_nbio(b,n)    BIO_ctrl(b,BIO_C_SET_NBIO,(n),NULL) */
 421 #define BIO_set_nbio_accept(b,n) BIO_ctrl(b,BIO_C_SET_ACCEPT,1,(n)?(void *)"a":NULL)
 422 #define BIO_set_accept_bios(b,bio) BIO_ctrl(b,BIO_C_SET_ACCEPT,2,(char *)bio)
 423
 424 #define BIO_BIND_NORMAL                 0
 425 #define BIO_BIND_REUSEADDR_IF_UNUSED    1
 426 #define BIO_BIND_REUSEADDR              2
 427 #define BIO_set_bind_mode(b,mode) BIO_ctrl(b,BIO_C_SET_BIND_MODE,mode,NULL)
 428 #define BIO_get_bind_mode(b,mode) BIO_ctrl(b,BIO_C_GET_BIND_MODE,0,NULL)
 429
 430 #define BIO_do_connect(b)       BIO_do_handshake(b)
 431 #define BIO_do_accept(b)        BIO_do_handshake(b)
 432 #define BIO_do_handshake(b)     BIO_ctrl(b,BIO_C_DO_STATE_MACHINE,0,NULL)
 433
 434 /* BIO_s_proxy_client() */
 435 #define BIO_set_url(b,url)      BIO_ctrl(b,BIO_C_SET_PROXY_PARAM,0,(char *)(url))
 436 #define BIO_set_proxies(b,p)    BIO_ctrl(b,BIO_C_SET_PROXY_PARAM,1,(char *)(p))
 437 /* BIO_set_nbio(b,n) */
 438 #define BIO_set_filter_bio(b,s) BIO_ctrl(b,BIO_C_SET_PROXY_PARAM,2,(char *)(s))
 439 /* BIO *BIO_get_filter_bio(BIO *bio); */
 440 #define BIO_set_proxy_cb(b,cb) BIO_callback_ctrl(b,BIO_C_SET_PROXY_PARAM,3,(void *(*cb)()))
 441 #define BIO_set_proxy_header(b,sk) BIO_ctrl(b,BIO_C_SET_PROXY_PARAM,4,(char *)sk)
 442 #define BIO_set_no_connect_return(b,bool) BIO_int_ctrl(b,BIO_C_SET_PROXY_PARAM,5,bool)
 443
 444 #define BIO_get_proxy_header(b,skp) BIO_ctrl(b,BIO_C_GET_PROXY_PARAM,0,(char *)skp)
 445 #define BIO_get_proxies(b,pxy_p) BIO_ctrl(b,BIO_C_GET_PROXY_PARAM,1,(char *)(pxy_p))
 446 #define BIO_get_url(b,url)      BIO_ctrl(b,BIO_C_GET_PROXY_PARAM,2,(char *)(url))
 447 #define BIO_get_no_connect_return(b)    BIO_ctrl(b,BIO_C_GET_PROXY_PARAM,5,NULL)
 448
 449 #define BIO_set_fd(b,fd,c)      BIO_int_ctrl(b,BIO_C_SET_FD,c,fd)
 450 #define BIO_get_fd(b,c)         BIO_ctrl(b,BIO_C_GET_FD,0,(char *)c)
 451
 452 #define BIO_set_fp(b,fp,c)      BIO_ctrl(b,BIO_C_SET_FILE_PTR,c,(char *)fp)
 453 #define BIO_get_fp(b,fpp)       BIO_ctrl(b,BIO_C_GET_FILE_PTR,0,(char *)fpp)
 454
 455 #define BIO_seek(b,ofs) (int)BIO_ctrl(b,BIO_C_FILE_SEEK,ofs,NULL)
 456 #define BIO_tell(b)     (int)BIO_ctrl(b,BIO_C_FILE_TELL,0,NULL)
 457
 458 /* name is cast to lose const, but might be better to route through a function
 459    so we can do it safely */
 460 #define BIO_read_filename(b,name) BIO_ctrl(b,BIO_C_SET_FILENAME, \
 461                 BIO_CLOSE|BIO_FP_READ,(char *)name)
 462 #define BIO_write_filename(b,name) BIO_ctrl(b,BIO_C_SET_FILENAME, \
 463                 BIO_CLOSE|BIO_FP_WRITE,name)
 464 #define BIO_append_filename(b,name) BIO_ctrl(b,BIO_C_SET_FILENAME, \
 465                 BIO_CLOSE|BIO_FP_APPEND,name)
 466 #define BIO_rw_filename(b,name) BIO_ctrl(b,BIO_C_SET_FILENAME, \
 467                 BIO_CLOSE|BIO_FP_READ|BIO_FP_WRITE,name)
 468
 469 /* WARNING WARNING, this ups the reference count on the read bio of the
 470  * SSL structure.  This is because the ssl read BIO is now pointed to by
 471  * the next_bio field in the bio.  So when you free the BIO, make sure
 472  * you are doing a BIO_free_all() to catch the underlying BIO. */
 473 #define BIO_set_ssl(b,ssl,c)    BIO_ctrl(b,BIO_C_SET_SSL,c,(char *)ssl)
 474 #define BIO_get_ssl(b,sslp)     BIO_ctrl(b,BIO_C_GET_SSL,0,(char *)sslp)
 475 #define BIO_set_ssl_mode(b,client)      BIO_ctrl(b,BIO_C_SSL_MODE,client,NULL)
 476 #define BIO_set_ssl_renegotiate_bytes(b,num) \
 477         BIO_ctrl(b,BIO_C_SET_SSL_RENEGOTIATE_BYTES,num,NULL)
 478 #define BIO_get_num_renegotiates(b) \
 479         BIO_ctrl(b,BIO_C_GET_SSL_NUM_RENEGOTIATES,0,NULL)
 480 #define BIO_set_ssl_renegotiate_timeout(b,seconds) \
 481         BIO_ctrl(b,BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT,seconds,NULL)
 482
 483 /* defined in evp.h */
 484 /* #define BIO_set_md(b,md)     BIO_ctrl(b,BIO_C_SET_MD,1,(char *)md) */
 485
 486 #define BIO_get_mem_data(b,pp)  BIO_ctrl(b,BIO_CTRL_INFO,0,(char *)pp)
 487 #define BIO_set_mem_buf(b,bm,c) BIO_ctrl(b,BIO_C_SET_BUF_MEM,c,(char *)bm)
 488 #define BIO_get_mem_ptr(b,pp)   BIO_ctrl(b,BIO_C_GET_BUF_MEM_PTR,0,(char *)pp)
 489 #define BIO_set_mem_eof_return(b,v) \
 490                                 BIO_ctrl(b,BIO_C_SET_BUF_MEM_EOF_RETURN,v,NULL)
 491
 492 /* For the BIO_f_buffer() type */
 493 #define BIO_get_buffer_num_lines(b)     BIO_ctrl(b,BIO_C_GET_BUFF_NUM_LINES,0,NULL)
 494 #define BIO_set_buffer_size(b,size)     BIO_ctrl(b,BIO_C_SET_BUFF_SIZE,size,NULL)
 495 #define BIO_set_read_buffer_size(b,size) BIO_int_ctrl(b,BIO_C_SET_BUFF_SIZE,size,0)
 496 #define BIO_set_write_buffer_size(b,size) BIO_int_ctrl(b,BIO_C_SET_BUFF_SIZE,size,1)
 497 #define BIO_set_buffer_read_data(b,buf,num) BIO_ctrl(b,BIO_C_SET_BUFF_READ_DATA,num,buf)
 498
 499 /* Don't use the next one unless you know what you are doing :-) */
 500 #define BIO_dup_state(b,ret)    BIO_ctrl(b,BIO_CTRL_DUP,0,(char *)(ret))
 501
 502 #define BIO_reset(b)            (int)BIO_ctrl(b,BIO_CTRL_RESET,0,NULL)
 503 #define BIO_eof(b)              (int)BIO_ctrl(b,BIO_CTRL_EOF,0,NULL)
 504 #define BIO_set_close(b,c)      (int)BIO_ctrl(b,BIO_CTRL_SET_CLOSE,(c),NULL)
 505 #define BIO_get_close(b)        (int)BIO_ctrl(b,BIO_CTRL_GET_CLOSE,0,NULL)
 506 #define BIO_pending(b)          (int)BIO_ctrl(b,BIO_CTRL_PENDING,0,NULL)
 507 #define BIO_wpending(b)         (int)BIO_ctrl(b,BIO_CTRL_WPENDING,0,NULL)
 508 /* ...pending macros have inappropriate return type */
 509 size_t BIO_ctrl_pending(BIO *b);
 510 size_t BIO_ctrl_wpending(BIO *b);
 511 #define BIO_flush(b)            (int)BIO_ctrl(b,BIO_CTRL_FLUSH,0,NULL)
 512 #define BIO_get_info_callback(b,cbp) (int)BIO_ctrl(b,BIO_CTRL_GET_CALLBACK,0, \
 513                                                    cbp)
 514 #define BIO_set_info_callback(b,cb) (int)BIO_callback_ctrl(b,BIO_CTRL_SET_CALLBACK,cb)
 515
 516 /* For the BIO_f_buffer() type */
 517 #define BIO_buffer_get_num_lines(b) BIO_ctrl(b,BIO_CTRL_GET,0,NULL)
 518
 519 /* For BIO_s_bio() */
 520 #define BIO_set_write_buf_size(b,size) (int)BIO_ctrl(b,BIO_C_SET_WRITE_BUF_SIZE,size,NULL)
 521 #define BIO_get_write_buf_size(b,size) (size_t)BIO_ctrl(b,BIO_C_GET_WRITE_BUF_SIZE,size,NULL)
 522 #define BIO_make_bio_pair(b1,b2)   (int)BIO_ctrl(b1,BIO_C_MAKE_BIO_PAIR,0,b2)
 523 #define BIO_destroy_bio_pair(b)    (int)BIO_ctrl(b,BIO_C_DESTROY_BIO_PAIR,0,NULL)
 524 #define BIO_shutdown_wr(b) (int)BIO_ctrl(b, BIO_C_SHUTDOWN_WR, 0, NULL)
 525 /* macros with inappropriate type -- but ...pending macros use int too: */
 526 #define BIO_get_write_guarantee(b) (int)BIO_ctrl(b,BIO_C_GET_WRITE_GUARANTEE,0,NULL)
 527 #define BIO_get_read_request(b)    (int)BIO_ctrl(b,BIO_C_GET_READ_REQUEST,0,NULL)
 528 size_t BIO_ctrl_get_write_guarantee(BIO *b);
 529 size_t BIO_ctrl_get_read_request(BIO *b);
 530 int BIO_ctrl_reset_read_request(BIO *b);
 531
 532 /* ctrl macros for dgram */
 533 #define BIO_ctrl_dgram_connect(b,peer)  \
 534                      (int)BIO_ctrl(b,BIO_CTRL_DGRAM_CONNECT,0, (char *)peer)
 535 #define BIO_ctrl_set_connected(b, state, peer) \
 536          (int)BIO_ctrl(b, BIO_CTRL_DGRAM_SET_CONNECTED, state, (char *)peer)
 537 #define BIO_dgram_recv_timedout(b) \
 538          (int)BIO_ctrl(b, BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP, 0, NULL)
 539 #define BIO_dgram_send_timedout(b) \
 540          (int)BIO_ctrl(b, BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP, 0, NULL)
 541 #define BIO_dgram_get_peer(b,peer) \
 542          (int)BIO_ctrl(b, BIO_CTRL_DGRAM_GET_PEER, 0, (char *)peer)
 543 #define BIO_dgram_set_peer(b,peer) \
 544          (int)BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, (char *)peer)
 545
 546 /* These two aren't currently implemented */
 547 /* int BIO_get_ex_num(BIO *bio); */
 548 /* void BIO_set_ex_free_func(BIO *bio,int idx,void (*cb)()); */
 549 int BIO_set_ex_data(BIO *bio, int idx, void *data);
 550 void *BIO_get_ex_data(BIO *bio, int idx);
 551 int
 552 BIO_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
 553 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);
 554 unsigned long BIO_number_read(BIO *bio);
 555 unsigned long BIO_number_written(BIO *bio);
 556
 557 /* For BIO_f_asn1() */
 558 int
 559 BIO_asn1_set_prefix(BIO *b, asn1_ps_func *prefix,
 560 asn1_ps_func *prefix_free);
 561 int
 562 BIO_asn1_get_prefix(BIO *b, asn1_ps_func **pprefix,
 563 asn1_ps_func **pprefix_free);
 564 int
 565 BIO_asn1_set_suffix(BIO *b, asn1_ps_func *suffix,
 566 asn1_ps_func *suffix_free);
 567 int
 568 BIO_asn1_get_suffix(BIO *b, asn1_ps_func **psuffix,
 569 asn1_ps_func **psuffix_free);
 570
 571 BIO_METHOD *BIO_s_file(void );
 572 BIO *BIO_new_file(const char *filename, const char *mode);
 573 BIO *BIO_new_fp(FILE *stream, int close_flag);
 574 # define BIO_s_file_internal    BIO_s_file
 575 BIO *   BIO_new(BIO_METHOD *type);
 576 int     BIO_set(BIO *a, BIO_METHOD *type);
 577 int     BIO_free(BIO *a);
 578 void    BIO_vfree(BIO *a);
 579 int     BIO_read(BIO *b, void *data, int len)
 580                 __attribute__((__bounded__(__buffer__,2,3)));
 581 int     BIO_gets(BIO *bp, char *buf, int size)
 582                 __attribute__((__bounded__ (__string__,2,3)));
 583 int     BIO_write(BIO *b, const void *data, int len)
 584                 __attribute__((__bounded__(__buffer__,2,3)));
 585 int     BIO_puts(BIO *bp, const char *buf);
 586 int     BIO_indent(BIO *b, int indent, int max);
 587 long    BIO_ctrl(BIO *bp, int cmd, long larg, void *parg);
 588 long    BIO_callback_ctrl(BIO *b, int cmd,
 589             void (*fp)(struct bio_st *, int, const char *, int, long, long));
 590 char *  BIO_ptr_ctrl(BIO *bp, int cmd, long larg);
 591 long    BIO_int_ctrl(BIO *bp, int cmd, long larg, int iarg);
 592 BIO *   BIO_push(BIO *b, BIO *append);
 593 BIO *   BIO_pop(BIO *b);
 594 void    BIO_free_all(BIO *a);
 595 BIO *   BIO_find_type(BIO *b, int bio_type);
 596 BIO *   BIO_next(BIO *b);
 597 BIO *   BIO_get_retry_BIO(BIO *bio, int *reason);
 598 int     BIO_get_retry_reason(BIO *bio);
 599 BIO *   BIO_dup_chain(BIO *in);
 600
 601 int BIO_nread0(BIO *bio, char **buf);
 602 int BIO_nread(BIO *bio, char **buf, int num);
 603 int BIO_nwrite0(BIO *bio, char **buf);
 604 int BIO_nwrite(BIO *bio, char **buf, int num);
 605
 606 long BIO_debug_callback(BIO *bio, int cmd, const char *argp, int argi,
 607     long argl, long ret);
 608
 609 BIO_METHOD *BIO_s_mem(void);
 610 BIO *BIO_new_mem_buf(void *buf, int len);
 611 BIO_METHOD *BIO_s_socket(void);
 612 BIO_METHOD *BIO_s_connect(void);
 613 BIO_METHOD *BIO_s_accept(void);
 614 BIO_METHOD *BIO_s_fd(void);
 615 BIO_METHOD *BIO_s_log(void);
 616 BIO_METHOD *BIO_s_bio(void);
 617 BIO_METHOD *BIO_s_null(void);
 618 BIO_METHOD *BIO_f_null(void);
 619 BIO_METHOD *BIO_f_buffer(void);
 620 BIO_METHOD *BIO_f_nbio_test(void);
 621 #ifndef OPENSSL_NO_DGRAM
 622 BIO_METHOD *BIO_s_datagram(void);
 623 #endif
 624
 625 /* BIO_METHOD *BIO_f_ber(void); */
 626
 627 int BIO_sock_should_retry(int i);
 628 int BIO_sock_non_fatal_error(int _error);
 629 int BIO_dgram_non_fatal_error(int _error);
 630
 631 int BIO_fd_should_retry(int i);
 632 int BIO_fd_non_fatal_error(int _error);
 633 int
 634 BIO_dump_cb(int (*cb)(const void *data, size_t len, void *u),
 635 void *u, const char *s, int len);
 636 int
 637 BIO_dump_indent_cb(int (*cb)(const void *data, size_t len, void *u),
 638 void *u, const char *s, int len, int indent);
 639 int BIO_dump(BIO *b, const char *bytes, int len);
 640 int BIO_dump_indent(BIO *b, const char *bytes, int len, int indent);
 641 int BIO_dump_fp(FILE *fp, const char *s, int len);
 642 int BIO_dump_indent_fp(FILE *fp, const char *s, int len, int indent);
 643 struct hostent *BIO_gethostbyname(const char *name);
 644 /* We might want a thread-safe interface too:
 645  * struct hostent *BIO_gethostbyname_r(const char *name,
 646  *     struct hostent *result, void *buffer, size_t buflen);
 647  * or something similar (caller allocates a struct hostent,
 648  * pointed to by "result", and additional buffer space for the various
 649  * substructures; if the buffer does not suffice, NULL is returned
 650  * and an appropriate error code is set).
 651  */
 652 int BIO_sock_error(int sock);
 653 int BIO_socket_ioctl(int fd, long type, void *arg);
 654 int BIO_socket_nbio(int fd, int mode);
 655 int BIO_get_port(const char *str, unsigned short *port_ptr);
 656 int BIO_get_host_ip(const char *str, unsigned char *ip);
 657 int BIO_get_accept_socket(char *host_port, int mode);
 658 int BIO_accept(int sock, char **ip_port);
 659 int BIO_sock_init(void );
 660 void BIO_sock_cleanup(void);
 661 int BIO_set_tcp_ndelay(int sock, int turn_on);
 662
 663 BIO *BIO_new_socket(int sock, int close_flag);
 664 BIO *BIO_new_dgram(int fd, int close_flag);
 665 BIO *BIO_new_fd(int fd, int close_flag);
 666 BIO *BIO_new_connect(char *host_port);
 667 BIO *BIO_new_accept(char *host_port);
 668
 669 int
 670 BIO_new_bio_pair(BIO **bio1, size_t writebuf1,
 671 BIO **bio2, size_t writebuf2);
 672 /* If successful, returns 1 and in *bio1, *bio2 two BIO pair endpoints.
 673  * Otherwise returns 0 and sets *bio1 and *bio2 to NULL.
 674  * Size 0 uses default value.
 675  */
 676
 677 void BIO_copy_next_retry(BIO *b);
 678
 679 /*long BIO_ghbn_ctrl(int cmd,int iarg,char *parg);*/
 680
 681 int
 682 BIO_printf(BIO *bio, const char *format, ...)
 683         __attribute__((__format__(__printf__, 2, 3), __nonnull__(2)));
 684 int
 685 BIO_vprintf(BIO *bio, const char *format, va_list args)
 686         __attribute__((__format__(__printf__, 2, 0), __nonnull__(2)));
 687 int
 688 BIO_snprintf(char *buf, size_t n, const char *format, ...)
 689         __attribute__((__deprecated__, __format__(__printf__, 3, 4),
 690             __nonnull__(3)));
 691 int
 692 BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)
 693         __attribute__((__deprecated__, __format__(__printf__, 3, 0),
 694             __nonnull__(3)));
 695
 696 /* BEGIN ERROR CODES */
 697 /* The following lines are auto generated by the script mkerr.pl. Any changes
 698  * made after this point may be overwritten when the script is next run.
 699  */
 700 void ERR_load_BIO_strings(void);
 701
 702 /* Error codes for the BIO functions. */
 703
 704 /* Function codes. */
 705 #define BIO_F_ACPT_STATE                                 100
 706 #define BIO_F_BIO_ACCEPT                                 101
 707 #define BIO_F_BIO_BER_GET_HEADER                         102
 708 #define BIO_F_BIO_CALLBACK_CTRL                          131
 709 #define BIO_F_BIO_CTRL                                   103
 710 #define BIO_F_BIO_GETHOSTBYNAME                          120
 711 #define BIO_F_BIO_GETS                                   104
 712 #define BIO_F_BIO_GET_ACCEPT_SOCKET                      105
 713 #define BIO_F_BIO_GET_HOST_IP                            106
 714 #define BIO_F_BIO_GET_PORT                               107
 715 #define BIO_F_BIO_MAKE_PAIR                              121
 716 #define BIO_F_BIO_NEW                                    108
 717 #define BIO_F_BIO_NEW_FILE                               109
 718 #define BIO_F_BIO_NEW_MEM_BUF                            126
 719 #define BIO_F_BIO_NREAD                                  123
 720 #define BIO_F_BIO_NREAD0                                 124
 721 #define BIO_F_BIO_NWRITE                                 125
 722 #define BIO_F_BIO_NWRITE0                                122
 723 #define BIO_F_BIO_PUTS                                   110
 724 #define BIO_F_BIO_READ                                   111
 725 #define BIO_F_BIO_SOCK_INIT                              112
 726 #define BIO_F_BIO_WRITE                                  113
 727 #define BIO_F_BUFFER_CTRL                                114
 728 #define BIO_F_CONN_CTRL                                  127
 729 #define BIO_F_CONN_STATE                                 115
 730 #define BIO_F_DGRAM_SCTP_READ                            132
 731 #define BIO_F_FILE_CTRL                                  116
 732 #define BIO_F_FILE_READ                                  130
 733 #define BIO_F_LINEBUFFER_CTRL                            129
 734 #define BIO_F_MEM_READ                                   128
 735 #define BIO_F_MEM_WRITE                                  117
 736 #define BIO_F_SSL_NEW                                    118
 737 #define BIO_F_WSASTARTUP                                 119
 738
 739 /* Reason codes. */
 740 #define BIO_R_ACCEPT_ERROR                               100
 741 #define BIO_R_BAD_FOPEN_MODE                             101
 742 #define BIO_R_BAD_HOSTNAME_LOOKUP                        102
 743 #define BIO_R_BROKEN_PIPE                                124
 744 #define BIO_R_CONNECT_ERROR                              103
 745 #define BIO_R_EOF_ON_MEMORY_BIO                          127
 746 #define BIO_R_ERROR_SETTING_NBIO                         104
 747 #define BIO_R_ERROR_SETTING_NBIO_ON_ACCEPTED_SOCKET      105
 748 #define BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET        106
 749 #define BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET          107
 750 #define BIO_R_INVALID_ARGUMENT                           125
 751 #define BIO_R_INVALID_IP_ADDRESS                         108
 752 #define BIO_R_INVALID_PORT_NUMBER                        129
 753 #define BIO_R_IN_USE                                     123
 754 #define BIO_R_KEEPALIVE                                  109
 755 #define BIO_R_NBIO_CONNECT_ERROR                         110
 756 #define BIO_R_NO_ACCEPT_PORT_SPECIFIED                   111
 757 #define BIO_R_NO_HOSTNAME_SPECIFIED                      112
 758 #define BIO_R_NO_PORT_DEFINED                            113
 759 #define BIO_R_NO_PORT_SPECIFIED                          114
 760 #define BIO_R_NO_SUCH_FILE                               128
 761 #define BIO_R_NULL_PARAMETER                             115
 762 #define BIO_R_TAG_MISMATCH                               116
 763 #define BIO_R_UNABLE_TO_BIND_SOCKET                      117
 764 #define BIO_R_UNABLE_TO_CREATE_SOCKET                    118
 765 #define BIO_R_UNABLE_TO_LISTEN_SOCKET                    119
 766 #define BIO_R_UNINITIALIZED                              120
 767 #define BIO_R_UNSUPPORTED_METHOD                         121
 768 #define BIO_R_WRITE_TO_READ_ONLY_BIO                     126
 769 #define BIO_R_WSASTARTUP                                 122
 770
 771 #ifdef  __cplusplus
 772 }
 773 #endif
 774 #endif