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d02b48c6 | 1 | /* crypto/bio/bss_acpt.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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 NO_SOCK | |
60 | ||
61 | #include <stdio.h> | |
62 | #include <errno.h> | |
63 | #define USE_SOCKETS | |
64 | #include "cryptlib.h" | |
65 | #include "bio.h" | |
66 | ||
67 | /* BIOerr(BIO_F_WSASTARTUP,BIO_R_WSASTARTUP ); */ | |
68 | ||
69 | #ifdef WIN16 | |
70 | #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */ | |
71 | #else | |
72 | #define SOCKET_PROTOCOL IPPROTO_TCP | |
73 | #endif | |
74 | ||
75 | typedef struct bio_accept_st | |
76 | { | |
77 | int state; | |
78 | char *param_addr; | |
79 | ||
80 | int accept_sock; | |
81 | int accept_nbio; | |
82 | ||
83 | char *addr; | |
84 | int nbio; | |
dfeab068 RE |
85 | /* If 0, it means normal, if 1, do a connect on bind failure, |
86 | * and if there is no-one listening, bind with SO_REUSEADDR. | |
87 | * If 2, always use SO_REUSEADDR. */ | |
88 | int bind_mode; | |
d02b48c6 RE |
89 | BIO *bio_chain; |
90 | } BIO_ACCEPT; | |
91 | ||
92 | #ifndef NOPROTO | |
93 | static int acpt_write(BIO *h,char *buf,int num); | |
94 | static int acpt_read(BIO *h,char *buf,int size); | |
95 | static int acpt_puts(BIO *h,char *str); | |
96 | static long acpt_ctrl(BIO *h,int cmd,long arg1,char *arg2); | |
97 | static int acpt_new(BIO *h); | |
98 | static int acpt_free(BIO *data); | |
99 | #else | |
100 | static int acpt_write(); | |
101 | static int acpt_read(); | |
102 | static int acpt_puts(); | |
103 | static long acpt_ctrl(); | |
104 | static int acpt_new(); | |
105 | static int acpt_free(); | |
106 | #endif | |
107 | ||
108 | #ifndef NOPROTO | |
109 | static int acpt_state(BIO *b, BIO_ACCEPT *c); | |
110 | static void acpt_close_socket(BIO *data); | |
111 | BIO_ACCEPT *BIO_ACCEPT_new(void ); | |
112 | void BIO_ACCEPT_free(BIO_ACCEPT *a); | |
113 | ||
114 | #else | |
115 | ||
116 | static int acpt_state(); | |
117 | static void acpt_close_socket(); | |
118 | BIO_ACCEPT *BIO_ACCEPT_new(); | |
119 | void BIO_ACCEPT_free(); | |
120 | #endif | |
121 | ||
122 | #define ACPT_S_BEFORE 1 | |
123 | #define ACPT_S_GET_ACCEPT_SOCKET 2 | |
124 | #define ACPT_S_OK 3 | |
125 | ||
126 | static BIO_METHOD methods_acceptp= | |
127 | { | |
58964a49 RE |
128 | BIO_TYPE_ACCEPT, |
129 | "socket accept", | |
d02b48c6 RE |
130 | acpt_write, |
131 | acpt_read, | |
132 | acpt_puts, | |
133 | NULL, /* connect_gets, */ | |
134 | acpt_ctrl, | |
135 | acpt_new, | |
136 | acpt_free, | |
137 | }; | |
138 | ||
6b691a5c | 139 | BIO_METHOD *BIO_s_accept(void) |
d02b48c6 RE |
140 | { |
141 | return(&methods_acceptp); | |
142 | } | |
143 | ||
6b691a5c | 144 | static int acpt_new(BIO *bi) |
d02b48c6 RE |
145 | { |
146 | BIO_ACCEPT *ba; | |
147 | ||
148 | bi->init=0; | |
149 | bi->num=INVALID_SOCKET; | |
150 | bi->flags=0; | |
151 | if ((ba=BIO_ACCEPT_new()) == NULL) | |
152 | return(0); | |
153 | bi->ptr=(char *)ba; | |
154 | ba->state=ACPT_S_BEFORE; | |
155 | bi->shutdown=1; | |
156 | return(1); | |
157 | } | |
158 | ||
6b691a5c | 159 | BIO_ACCEPT *BIO_ACCEPT_new(void) |
d02b48c6 RE |
160 | { |
161 | BIO_ACCEPT *ret; | |
162 | ||
163 | if ((ret=(BIO_ACCEPT *)Malloc(sizeof(BIO_ACCEPT))) == NULL) | |
164 | return(NULL); | |
165 | ||
166 | memset(ret,0,sizeof(BIO_ACCEPT)); | |
167 | ret->accept_sock=INVALID_SOCKET; | |
dfeab068 | 168 | ret->bind_mode=BIO_BIND_NORMAL; |
d02b48c6 RE |
169 | return(ret); |
170 | } | |
171 | ||
6b691a5c | 172 | void BIO_ACCEPT_free(BIO_ACCEPT *a) |
d02b48c6 | 173 | { |
e03ddfae BL |
174 | if(a == NULL) |
175 | return; | |
176 | ||
d02b48c6 RE |
177 | if (a->param_addr != NULL) Free(a->param_addr); |
178 | if (a->addr != NULL) Free(a->addr); | |
179 | if (a->bio_chain != NULL) BIO_free(a->bio_chain); | |
180 | Free(a); | |
181 | } | |
182 | ||
6b691a5c | 183 | static void acpt_close_socket(BIO *bio) |
d02b48c6 RE |
184 | { |
185 | BIO_ACCEPT *c; | |
186 | ||
187 | c=(BIO_ACCEPT *)bio->ptr; | |
188 | if (c->accept_sock != INVALID_SOCKET) | |
189 | { | |
190 | shutdown(c->accept_sock,2); | |
d02b48c6 | 191 | closesocket(c->accept_sock); |
d02b48c6 RE |
192 | c->accept_sock=INVALID_SOCKET; |
193 | bio->num=INVALID_SOCKET; | |
194 | } | |
195 | } | |
196 | ||
6b691a5c | 197 | static int acpt_free(BIO *a) |
d02b48c6 RE |
198 | { |
199 | BIO_ACCEPT *data; | |
200 | ||
201 | if (a == NULL) return(0); | |
202 | data=(BIO_ACCEPT *)a->ptr; | |
203 | ||
204 | if (a->shutdown) | |
205 | { | |
206 | acpt_close_socket(a); | |
207 | BIO_ACCEPT_free(data); | |
208 | a->ptr=NULL; | |
209 | a->flags=0; | |
210 | a->init=0; | |
211 | } | |
212 | return(1); | |
213 | } | |
214 | ||
6b691a5c | 215 | static int acpt_state(BIO *b, BIO_ACCEPT *c) |
d02b48c6 RE |
216 | { |
217 | BIO *bio=NULL,*dbio; | |
d02b48c6 RE |
218 | int s= -1; |
219 | int i; | |
220 | ||
221 | again: | |
222 | switch (c->state) | |
223 | { | |
224 | case ACPT_S_BEFORE: | |
225 | if (c->param_addr == NULL) | |
226 | { | |
227 | BIOerr(BIO_F_ACPT_STATE,BIO_R_NO_ACCEPT_PORT_SPECIFIED); | |
228 | return(-1); | |
229 | } | |
dfeab068 | 230 | s=BIO_get_accept_socket(c->param_addr,c->bind_mode); |
d02b48c6 RE |
231 | if (s == INVALID_SOCKET) |
232 | return(-1); | |
233 | ||
d02b48c6 RE |
234 | if (c->accept_nbio) |
235 | { | |
dfeab068 | 236 | if (!BIO_socket_nbio(s,1)) |
d02b48c6 | 237 | { |
d02b48c6 | 238 | closesocket(s); |
d02b48c6 RE |
239 | BIOerr(BIO_F_ACPT_STATE,BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET); |
240 | return(-1); | |
241 | } | |
242 | } | |
d02b48c6 RE |
243 | c->accept_sock=s; |
244 | b->num=s; | |
245 | c->state=ACPT_S_GET_ACCEPT_SOCKET; | |
246 | return(1); | |
dfeab068 | 247 | /* break; */ |
d02b48c6 RE |
248 | case ACPT_S_GET_ACCEPT_SOCKET: |
249 | if (b->next_bio != NULL) | |
250 | { | |
251 | c->state=ACPT_S_OK; | |
252 | goto again; | |
253 | } | |
254 | i=BIO_accept(c->accept_sock,&(c->addr)); | |
255 | if (i < 0) return(i); | |
256 | bio=BIO_new_socket(i,BIO_CLOSE); | |
257 | if (bio == NULL) goto err; | |
258 | ||
259 | BIO_set_callback(bio,BIO_get_callback(b)); | |
260 | BIO_set_callback_arg(bio,BIO_get_callback_arg(b)); | |
261 | ||
d02b48c6 RE |
262 | if (c->nbio) |
263 | { | |
dfeab068 | 264 | if (!BIO_socket_nbio(i,1)) |
d02b48c6 RE |
265 | { |
266 | BIOerr(BIO_F_ACPT_STATE,BIO_R_ERROR_SETTING_NBIO_ON_ACCEPTED_SOCKET); | |
267 | goto err; | |
268 | } | |
269 | } | |
d02b48c6 RE |
270 | |
271 | /* If the accept BIO has an bio_chain, we dup it and | |
272 | * put the new socket at the end. */ | |
273 | if (c->bio_chain != NULL) | |
274 | { | |
275 | if ((dbio=BIO_dup_chain(c->bio_chain)) == NULL) | |
276 | goto err; | |
277 | if (!BIO_push(dbio,bio)) goto err; | |
278 | bio=dbio; | |
279 | } | |
280 | if (BIO_push(b,bio) == NULL) goto err; | |
281 | ||
282 | c->state=ACPT_S_OK; | |
283 | return(1); | |
284 | err: | |
285 | if (bio != NULL) | |
286 | BIO_free(bio); | |
287 | else if (s >= 0) | |
d02b48c6 | 288 | closesocket(s); |
d02b48c6 | 289 | return(0); |
dfeab068 | 290 | /* break; */ |
d02b48c6 RE |
291 | case ACPT_S_OK: |
292 | if (b->next_bio == NULL) | |
293 | { | |
294 | c->state=ACPT_S_GET_ACCEPT_SOCKET; | |
295 | goto again; | |
296 | } | |
297 | return(1); | |
dfeab068 | 298 | /* break; */ |
d02b48c6 RE |
299 | default: |
300 | return(0); | |
dfeab068 | 301 | /* break; */ |
d02b48c6 RE |
302 | } |
303 | ||
304 | } | |
305 | ||
6b691a5c | 306 | static int acpt_read(BIO *b, char *out, int outl) |
d02b48c6 RE |
307 | { |
308 | int ret=0; | |
309 | BIO_ACCEPT *data; | |
310 | ||
311 | BIO_clear_retry_flags(b); | |
312 | data=(BIO_ACCEPT *)b->ptr; | |
313 | ||
314 | while (b->next_bio == NULL) | |
315 | { | |
316 | ret=acpt_state(b,data); | |
317 | if (ret <= 0) return(ret); | |
318 | } | |
319 | ||
320 | ret=BIO_read(b->next_bio,out,outl); | |
321 | BIO_copy_next_retry(b); | |
322 | return(ret); | |
323 | } | |
324 | ||
6b691a5c | 325 | static int acpt_write(BIO *b, char *in, int inl) |
d02b48c6 RE |
326 | { |
327 | int ret; | |
328 | BIO_ACCEPT *data; | |
329 | ||
330 | BIO_clear_retry_flags(b); | |
331 | data=(BIO_ACCEPT *)b->ptr; | |
332 | ||
333 | while (b->next_bio == NULL) | |
334 | { | |
335 | ret=acpt_state(b,data); | |
336 | if (ret <= 0) return(ret); | |
337 | } | |
338 | ||
339 | ret=BIO_write(b->next_bio,in,inl); | |
340 | BIO_copy_next_retry(b); | |
341 | return(ret); | |
342 | } | |
343 | ||
6b691a5c | 344 | static long acpt_ctrl(BIO *b, int cmd, long num, char *ptr) |
d02b48c6 RE |
345 | { |
346 | BIO *dbio; | |
347 | int *ip; | |
348 | long ret=1; | |
349 | BIO_ACCEPT *data; | |
58964a49 | 350 | char **pp; |
d02b48c6 RE |
351 | |
352 | data=(BIO_ACCEPT *)b->ptr; | |
353 | ||
354 | switch (cmd) | |
355 | { | |
356 | case BIO_CTRL_RESET: | |
357 | ret=0; | |
358 | data->state=ACPT_S_BEFORE; | |
359 | acpt_close_socket(b); | |
360 | b->flags=0; | |
361 | break; | |
362 | case BIO_C_DO_STATE_MACHINE: | |
363 | /* use this one to start the connection */ | |
364 | ret=(long)acpt_state(b,data); | |
365 | break; | |
366 | case BIO_C_SET_ACCEPT: | |
367 | if (ptr != NULL) | |
368 | { | |
369 | if (num == 0) | |
370 | { | |
371 | b->init=1; | |
372 | if (data->param_addr != NULL) | |
373 | Free(data->param_addr); | |
374 | data->param_addr=BUF_strdup(ptr); | |
375 | } | |
376 | else if (num == 1) | |
377 | { | |
378 | data->accept_nbio=(ptr != NULL); | |
379 | } | |
380 | else if (num == 2) | |
381 | { | |
382 | if (data->bio_chain != NULL) | |
383 | BIO_free(data->bio_chain); | |
384 | data->bio_chain=(BIO *)ptr; | |
385 | } | |
386 | } | |
387 | break; | |
388 | case BIO_C_SET_NBIO: | |
389 | data->nbio=(int)num; | |
390 | break; | |
dfeab068 RE |
391 | case BIO_C_SET_FD: |
392 | b->init=1; | |
393 | b->num= *((int *)ptr); | |
394 | data->accept_sock=b->num; | |
395 | data->state=ACPT_S_GET_ACCEPT_SOCKET; | |
396 | b->shutdown=(int)num; | |
397 | b->init=1; | |
398 | break; | |
d02b48c6 RE |
399 | case BIO_C_GET_FD: |
400 | if (b->init) | |
401 | { | |
402 | ip=(int *)ptr; | |
403 | if (ip != NULL) | |
404 | *ip=data->accept_sock; | |
dfeab068 | 405 | ret=data->accept_sock; |
d02b48c6 RE |
406 | } |
407 | else | |
408 | ret= -1; | |
409 | break; | |
58964a49 RE |
410 | case BIO_C_GET_ACCEPT: |
411 | if (b->init) | |
412 | { | |
413 | if (ptr != NULL) | |
414 | { | |
415 | pp=(char **)ptr; | |
416 | *pp=data->param_addr; | |
417 | } | |
418 | else | |
419 | ret= -1; | |
420 | } | |
421 | else | |
422 | ret= -1; | |
423 | break; | |
d02b48c6 RE |
424 | case BIO_CTRL_GET_CLOSE: |
425 | ret=b->shutdown; | |
426 | break; | |
427 | case BIO_CTRL_SET_CLOSE: | |
428 | b->shutdown=(int)num; | |
429 | break; | |
430 | case BIO_CTRL_PENDING: | |
431 | case BIO_CTRL_WPENDING: | |
432 | ret=0; | |
433 | break; | |
434 | case BIO_CTRL_FLUSH: | |
435 | break; | |
dfeab068 RE |
436 | case BIO_C_SET_BIND_MODE: |
437 | data->bind_mode=(int)num; | |
438 | break; | |
439 | case BIO_C_GET_BIND_MODE: | |
440 | ret=(long)data->bind_mode; | |
441 | break; | |
d02b48c6 RE |
442 | case BIO_CTRL_DUP: |
443 | dbio=(BIO *)ptr; | |
444 | /* if (data->param_port) EAY EAY | |
445 | BIO_set_port(dbio,data->param_port); | |
446 | if (data->param_hostname) | |
447 | BIO_set_hostname(dbio,data->param_hostname); | |
448 | BIO_set_nbio(dbio,data->nbio); */ | |
449 | break; | |
450 | ||
451 | default: | |
452 | ret=0; | |
453 | break; | |
454 | } | |
455 | return(ret); | |
456 | } | |
457 | ||
6b691a5c | 458 | static int acpt_puts(BIO *bp, char *str) |
d02b48c6 RE |
459 | { |
460 | int n,ret; | |
461 | ||
462 | n=strlen(str); | |
463 | ret=acpt_write(bp,str,n); | |
464 | return(ret); | |
465 | } | |
466 | ||
6b691a5c | 467 | BIO *BIO_new_accept(char *str) |
d02b48c6 RE |
468 | { |
469 | BIO *ret; | |
470 | ||
471 | ret=BIO_new(BIO_s_accept()); | |
472 | if (ret == NULL) return(NULL); | |
473 | if (BIO_set_accept_port(ret,str)) | |
474 | return(ret); | |
475 | else | |
476 | { | |
477 | BIO_free(ret); | |
478 | return(NULL); | |
479 | } | |
480 | } | |
481 | ||
482 | #endif |