Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* crypto/bio/bss_acpt.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 <errno.h> |
| 61 | #define USE_SOCKETS |
| 62 | #include "cryptlib.h" |
| 63 | #include <openssl/bio.h> |
| 64 | |
| 65 | #ifndef OPENSSL_NO_SOCK |
| 66 | |
| 67 | #ifdef OPENSSL_SYS_WIN16 |
| 68 | #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */ |
| 69 | #else |
| 70 | #define SOCKET_PROTOCOL IPPROTO_TCP |
| 71 | #endif |
| 72 | |
| 73 | #if (defined(OPENSSL_SYS_VMS) && __VMS_VER < 70000000) |
| 74 | /* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */ |
| 75 | #undef FIONBIO |
| 76 | #endif |
| 77 | |
| 78 | typedef struct bio_accept_st |
| 79 | { |
| 80 | int state; |
| 81 | char *param_addr; |
| 82 | |
| 83 | int accept_sock; |
| 84 | int accept_nbio; |
| 85 | |
| 86 | char *addr; |
| 87 | int nbio; |
| 88 | /* If 0, it means normal, if 1, do a connect on bind failure, |
| 89 | * and if there is no-one listening, bind with SO_REUSEADDR. |
| 90 | * If 2, always use SO_REUSEADDR. */ |
| 91 | int bind_mode; |
| 92 | BIO *bio_chain; |
| 93 | } BIO_ACCEPT; |
| 94 | |
| 95 | static int acpt_write(BIO *h, const char *buf, int num); |
| 96 | static int acpt_read(BIO *h, char *buf, int size); |
| 97 | static int acpt_puts(BIO *h, const char *str); |
| 98 | static long acpt_ctrl(BIO *h, int cmd, long arg1, void *arg2); |
| 99 | static int acpt_new(BIO *h); |
| 100 | static int acpt_free(BIO *data); |
| 101 | static int acpt_state(BIO *b, BIO_ACCEPT *c); |
| 102 | static void acpt_close_socket(BIO *data); |
| 103 | static BIO_ACCEPT *BIO_ACCEPT_new(void ); |
| 104 | static void BIO_ACCEPT_free(BIO_ACCEPT *a); |
| 105 | |
| 106 | #define ACPT_S_BEFORE 1 |
| 107 | #define ACPT_S_GET_ACCEPT_SOCKET 2 |
| 108 | #define ACPT_S_OK 3 |
| 109 | |
| 110 | static BIO_METHOD methods_acceptp= |
| 111 | { |
| 112 | BIO_TYPE_ACCEPT, |
| 113 | "socket accept", |
| 114 | acpt_write, |
| 115 | acpt_read, |
| 116 | acpt_puts, |
| 117 | NULL, /* connect_gets, */ |
| 118 | acpt_ctrl, |
| 119 | acpt_new, |
| 120 | acpt_free, |
| 121 | NULL, |
| 122 | }; |
| 123 | |
| 124 | BIO_METHOD *BIO_s_accept(void) |
| 125 | { |
| 126 | return(&methods_acceptp); |
| 127 | } |
| 128 | |
| 129 | static int acpt_new(BIO *bi) |
| 130 | { |
| 131 | BIO_ACCEPT *ba; |
| 132 | |
| 133 | bi->init=0; |
| 134 | bi->num=INVALID_SOCKET; |
| 135 | bi->flags=0; |
| 136 | if ((ba=BIO_ACCEPT_new()) == NULL) |
| 137 | return(0); |
| 138 | bi->ptr=(char *)ba; |
| 139 | ba->state=ACPT_S_BEFORE; |
| 140 | bi->shutdown=1; |
| 141 | return(1); |
| 142 | } |
| 143 | |
| 144 | static BIO_ACCEPT *BIO_ACCEPT_new(void) |
| 145 | { |
| 146 | BIO_ACCEPT *ret; |
| 147 | |
| 148 | if ((ret=(BIO_ACCEPT *)OPENSSL_malloc(sizeof(BIO_ACCEPT))) == NULL) |
| 149 | return(NULL); |
| 150 | |
| 151 | memset(ret,0,sizeof(BIO_ACCEPT)); |
| 152 | ret->accept_sock=INVALID_SOCKET; |
| 153 | ret->bind_mode=BIO_BIND_NORMAL; |
| 154 | return(ret); |
| 155 | } |
| 156 | |
| 157 | static void BIO_ACCEPT_free(BIO_ACCEPT *a) |
| 158 | { |
| 159 | if(a == NULL) |
| 160 | return; |
| 161 | |
| 162 | if (a->param_addr != NULL) OPENSSL_free(a->param_addr); |
| 163 | if (a->addr != NULL) OPENSSL_free(a->addr); |
| 164 | if (a->bio_chain != NULL) BIO_free(a->bio_chain); |
| 165 | OPENSSL_free(a); |
| 166 | } |
| 167 | |
| 168 | static void acpt_close_socket(BIO *bio) |
| 169 | { |
| 170 | BIO_ACCEPT *c; |
| 171 | |
| 172 | c=(BIO_ACCEPT *)bio->ptr; |
| 173 | if (c->accept_sock != INVALID_SOCKET) |
| 174 | { |
| 175 | shutdown(c->accept_sock,2); |
| 176 | closesocket(c->accept_sock); |
| 177 | c->accept_sock=INVALID_SOCKET; |
| 178 | bio->num=INVALID_SOCKET; |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | static int acpt_free(BIO *a) |
| 183 | { |
| 184 | BIO_ACCEPT *data; |
| 185 | |
| 186 | if (a == NULL) return(0); |
| 187 | data=(BIO_ACCEPT *)a->ptr; |
| 188 | |
| 189 | if (a->shutdown) |
| 190 | { |
| 191 | acpt_close_socket(a); |
| 192 | BIO_ACCEPT_free(data); |
| 193 | a->ptr=NULL; |
| 194 | a->flags=0; |
| 195 | a->init=0; |
| 196 | } |
| 197 | return(1); |
| 198 | } |
| 199 | |
| 200 | static int acpt_state(BIO *b, BIO_ACCEPT *c) |
| 201 | { |
| 202 | BIO *bio=NULL,*dbio; |
| 203 | int s= -1; |
| 204 | int i; |
| 205 | |
| 206 | again: |
| 207 | switch (c->state) |
| 208 | { |
| 209 | case ACPT_S_BEFORE: |
| 210 | if (c->param_addr == NULL) |
| 211 | { |
| 212 | BIOerr(BIO_F_ACPT_STATE,BIO_R_NO_ACCEPT_PORT_SPECIFIED); |
| 213 | return(-1); |
| 214 | } |
| 215 | s=BIO_get_accept_socket(c->param_addr,c->bind_mode); |
| 216 | if (s == INVALID_SOCKET) |
| 217 | return(-1); |
| 218 | |
| 219 | if (c->accept_nbio) |
| 220 | { |
| 221 | if (!BIO_socket_nbio(s,1)) |
| 222 | { |
| 223 | closesocket(s); |
| 224 | BIOerr(BIO_F_ACPT_STATE,BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET); |
| 225 | return(-1); |
| 226 | } |
| 227 | } |
| 228 | c->accept_sock=s; |
| 229 | b->num=s; |
| 230 | c->state=ACPT_S_GET_ACCEPT_SOCKET; |
| 231 | return(1); |
| 232 | /* break; */ |
| 233 | case ACPT_S_GET_ACCEPT_SOCKET: |
| 234 | if (b->next_bio != NULL) |
| 235 | { |
| 236 | c->state=ACPT_S_OK; |
| 237 | goto again; |
| 238 | } |
| 239 | BIO_clear_retry_flags(b); |
| 240 | b->retry_reason=0; |
| 241 | i=BIO_accept(c->accept_sock,&(c->addr)); |
| 242 | |
| 243 | /* -2 return means we should retry */ |
| 244 | if(i == -2) |
| 245 | { |
| 246 | BIO_set_retry_special(b); |
| 247 | b->retry_reason=BIO_RR_ACCEPT; |
| 248 | return -1; |
| 249 | } |
| 250 | |
| 251 | if (i < 0) return(i); |
| 252 | |
| 253 | bio=BIO_new_socket(i,BIO_CLOSE); |
| 254 | if (bio == NULL) goto err; |
| 255 | |
| 256 | BIO_set_callback(bio,BIO_get_callback(b)); |
| 257 | BIO_set_callback_arg(bio,BIO_get_callback_arg(b)); |
| 258 | |
| 259 | if (c->nbio) |
| 260 | { |
| 261 | if (!BIO_socket_nbio(i,1)) |
| 262 | { |
| 263 | BIOerr(BIO_F_ACPT_STATE,BIO_R_ERROR_SETTING_NBIO_ON_ACCEPTED_SOCKET); |
| 264 | goto err; |
| 265 | } |
| 266 | } |
| 267 | |
| 268 | /* If the accept BIO has an bio_chain, we dup it and |
| 269 | * put the new socket at the end. */ |
| 270 | if (c->bio_chain != NULL) |
| 271 | { |
| 272 | if ((dbio=BIO_dup_chain(c->bio_chain)) == NULL) |
| 273 | goto err; |
| 274 | if (!BIO_push(dbio,bio)) goto err; |
| 275 | bio=dbio; |
| 276 | } |
| 277 | if (BIO_push(b,bio) == NULL) goto err; |
| 278 | |
| 279 | c->state=ACPT_S_OK; |
| 280 | return(1); |
| 281 | err: |
| 282 | if (bio != NULL) |
| 283 | BIO_free(bio); |
| 284 | else if (s >= 0) |
| 285 | closesocket(s); |
| 286 | return(0); |
| 287 | /* break; */ |
| 288 | case ACPT_S_OK: |
| 289 | if (b->next_bio == NULL) |
| 290 | { |
| 291 | c->state=ACPT_S_GET_ACCEPT_SOCKET; |
| 292 | goto again; |
| 293 | } |
| 294 | return(1); |
| 295 | /* break; */ |
| 296 | default: |
| 297 | return(0); |
| 298 | /* break; */ |
| 299 | } |
| 300 | |
| 301 | } |
| 302 | |
| 303 | static int acpt_read(BIO *b, char *out, int outl) |
| 304 | { |
| 305 | int ret=0; |
| 306 | BIO_ACCEPT *data; |
| 307 | |
| 308 | BIO_clear_retry_flags(b); |
| 309 | data=(BIO_ACCEPT *)b->ptr; |
| 310 | |
| 311 | while (b->next_bio == NULL) |
| 312 | { |
| 313 | ret=acpt_state(b,data); |
| 314 | if (ret <= 0) return(ret); |
| 315 | } |
| 316 | |
| 317 | ret=BIO_read(b->next_bio,out,outl); |
| 318 | BIO_copy_next_retry(b); |
| 319 | return(ret); |
| 320 | } |
| 321 | |
| 322 | static int acpt_write(BIO *b, const char *in, int inl) |
| 323 | { |
| 324 | int ret; |
| 325 | BIO_ACCEPT *data; |
| 326 | |
| 327 | BIO_clear_retry_flags(b); |
| 328 | data=(BIO_ACCEPT *)b->ptr; |
| 329 | |
| 330 | while (b->next_bio == NULL) |
| 331 | { |
| 332 | ret=acpt_state(b,data); |
| 333 | if (ret <= 0) return(ret); |
| 334 | } |
| 335 | |
| 336 | ret=BIO_write(b->next_bio,in,inl); |
| 337 | BIO_copy_next_retry(b); |
| 338 | return(ret); |
| 339 | } |
| 340 | |
| 341 | static long acpt_ctrl(BIO *b, int cmd, long num, void *ptr) |
| 342 | { |
| 343 | int *ip; |
| 344 | long ret=1; |
| 345 | BIO_ACCEPT *data; |
| 346 | char **pp; |
| 347 | |
| 348 | data=(BIO_ACCEPT *)b->ptr; |
| 349 | |
| 350 | switch (cmd) |
| 351 | { |
| 352 | case BIO_CTRL_RESET: |
| 353 | ret=0; |
| 354 | data->state=ACPT_S_BEFORE; |
| 355 | acpt_close_socket(b); |
| 356 | b->flags=0; |
| 357 | break; |
| 358 | case BIO_C_DO_STATE_MACHINE: |
| 359 | /* use this one to start the connection */ |
| 360 | ret=(long)acpt_state(b,data); |
| 361 | break; |
| 362 | case BIO_C_SET_ACCEPT: |
| 363 | if (ptr != NULL) |
| 364 | { |
| 365 | if (num == 0) |
| 366 | { |
| 367 | b->init=1; |
| 368 | if (data->param_addr != NULL) |
| 369 | OPENSSL_free(data->param_addr); |
| 370 | data->param_addr=BUF_strdup(ptr); |
| 371 | } |
| 372 | else if (num == 1) |
| 373 | { |
| 374 | data->accept_nbio=(ptr != NULL); |
| 375 | } |
| 376 | else if (num == 2) |
| 377 | { |
| 378 | if (data->bio_chain != NULL) |
| 379 | BIO_free(data->bio_chain); |
| 380 | data->bio_chain=(BIO *)ptr; |
| 381 | } |
| 382 | } |
| 383 | break; |
| 384 | case BIO_C_SET_NBIO: |
| 385 | data->nbio=(int)num; |
| 386 | break; |
| 387 | case BIO_C_SET_FD: |
| 388 | b->init=1; |
| 389 | b->num= *((int *)ptr); |
| 390 | data->accept_sock=b->num; |
| 391 | data->state=ACPT_S_GET_ACCEPT_SOCKET; |
| 392 | b->shutdown=(int)num; |
| 393 | b->init=1; |
| 394 | break; |
| 395 | case BIO_C_GET_FD: |
| 396 | if (b->init) |
| 397 | { |
| 398 | ip=(int *)ptr; |
| 399 | if (ip != NULL) |
| 400 | *ip=data->accept_sock; |
| 401 | ret=data->accept_sock; |
| 402 | } |
| 403 | else |
| 404 | ret= -1; |
| 405 | break; |
| 406 | case BIO_C_GET_ACCEPT: |
| 407 | if (b->init) |
| 408 | { |
| 409 | if (ptr != NULL) |
| 410 | { |
| 411 | pp=(char **)ptr; |
| 412 | *pp=data->param_addr; |
| 413 | } |
| 414 | else |
| 415 | ret= -1; |
| 416 | } |
| 417 | else |
| 418 | ret= -1; |
| 419 | break; |
| 420 | case BIO_CTRL_GET_CLOSE: |
| 421 | ret=b->shutdown; |
| 422 | break; |
| 423 | case BIO_CTRL_SET_CLOSE: |
| 424 | b->shutdown=(int)num; |
| 425 | break; |
| 426 | case BIO_CTRL_PENDING: |
| 427 | case BIO_CTRL_WPENDING: |
| 428 | ret=0; |
| 429 | break; |
| 430 | case BIO_CTRL_FLUSH: |
| 431 | break; |
| 432 | case BIO_C_SET_BIND_MODE: |
| 433 | data->bind_mode=(int)num; |
| 434 | break; |
| 435 | case BIO_C_GET_BIND_MODE: |
| 436 | ret=(long)data->bind_mode; |
| 437 | break; |
| 438 | case BIO_CTRL_DUP: |
| 439 | /* dbio=(BIO *)ptr; |
| 440 | if (data->param_port) EAY EAY |
| 441 | BIO_set_port(dbio,data->param_port); |
| 442 | if (data->param_hostname) |
| 443 | BIO_set_hostname(dbio,data->param_hostname); |
| 444 | BIO_set_nbio(dbio,data->nbio); */ |
| 445 | break; |
| 446 | |
| 447 | default: |
| 448 | ret=0; |
| 449 | break; |
| 450 | } |
| 451 | return(ret); |
| 452 | } |
| 453 | |
| 454 | static int acpt_puts(BIO *bp, const char *str) |
| 455 | { |
| 456 | int n,ret; |
| 457 | |
| 458 | n=strlen(str); |
| 459 | ret=acpt_write(bp,str,n); |
| 460 | return(ret); |
| 461 | } |
| 462 | |
| 463 | BIO *BIO_new_accept(char *str) |
| 464 | { |
| 465 | BIO *ret; |
| 466 | |
| 467 | ret=BIO_new(BIO_s_accept()); |
| 468 | if (ret == NULL) return(NULL); |
| 469 | if (BIO_set_accept_port(ret,str)) |
| 470 | return(ret); |
| 471 | else |
| 472 | { |
| 473 | BIO_free(ret); |
| 474 | return(NULL); |
| 475 | } |
| 476 | } |
| 477 | |
| 478 | #endif |