1 /* crypto/bio/bss_conn.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
63 #include <openssl/bio.h>
65 #ifndef OPENSSL_NO_SOCK
67 # ifdef OPENSSL_SYS_WIN16
68 # define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
70 # define SOCKET_PROTOCOL IPPROTO_TCP
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 */
78 typedef struct bio_connect_st
{
85 struct sockaddr_in them
;
87 * int socket; this will be kept in bio->num so that it is compatible
88 * with the bss_sock bio
91 * called when the connection is initially made callback(BIO,state,ret);
92 * The callback should return 'ret'. state is for compatibility with the
95 int (*info_callback
) (const BIO
*bio
, int state
, int ret
);
98 static int conn_write(BIO
*h
, const char *buf
, int num
);
99 static int conn_read(BIO
*h
, char *buf
, int size
);
100 static int conn_puts(BIO
*h
, const char *str
);
101 static long conn_ctrl(BIO
*h
, int cmd
, long arg1
, void *arg2
);
102 static int conn_new(BIO
*h
);
103 static int conn_free(BIO
*data
);
104 static long conn_callback_ctrl(BIO
*h
, int cmd
, bio_info_cb
*);
106 static int conn_state(BIO
*b
, BIO_CONNECT
*c
);
107 static void conn_close_socket(BIO
*data
);
108 BIO_CONNECT
*BIO_CONNECT_new(void);
109 void BIO_CONNECT_free(BIO_CONNECT
*a
);
111 static BIO_METHOD methods_connectp
= {
117 NULL
, /* connect_gets, */
124 static int conn_state(BIO
*b
, BIO_CONNECT
*c
)
129 int (*cb
) (const BIO
*, int, int) = NULL
;
131 if (c
->info_callback
!= NULL
)
132 cb
= c
->info_callback
;
136 case BIO_CONN_S_BEFORE
:
137 p
= c
->param_hostname
;
139 BIOerr(BIO_F_CONN_STATE
, BIO_R_NO_HOSTNAME_SPECIFIED
);
142 for (; *p
!= '\0'; p
++) {
143 if ((*p
== ':') || (*p
== '/'))
148 if ((i
== ':') || (i
== '/')) {
157 if (c
->param_port
!= NULL
)
158 OPENSSL_free(c
->param_port
);
159 c
->param_port
= BUF_strdup(p
);
163 if (c
->param_port
== NULL
) {
164 BIOerr(BIO_F_CONN_STATE
, BIO_R_NO_PORT_SPECIFIED
);
165 ERR_add_error_data(2, "host=", c
->param_hostname
);
168 c
->state
= BIO_CONN_S_GET_IP
;
171 case BIO_CONN_S_GET_IP
:
172 if (BIO_get_host_ip(c
->param_hostname
, &(c
->ip
[0])) <= 0)
174 c
->state
= BIO_CONN_S_GET_PORT
;
177 case BIO_CONN_S_GET_PORT
:
178 if (c
->param_port
== NULL
) {
181 } else if (BIO_get_port(c
->param_port
, &c
->port
) <= 0)
183 c
->state
= BIO_CONN_S_CREATE_SOCKET
;
186 case BIO_CONN_S_CREATE_SOCKET
:
187 /* now setup address */
188 memset((char *)&c
->them
, 0, sizeof(c
->them
));
189 c
->them
.sin_family
= AF_INET
;
190 c
->them
.sin_port
= htons((unsigned short)c
->port
);
192 ((unsigned long)c
->ip
[0] << 24L) |
193 ((unsigned long)c
->ip
[1] << 16L) |
194 ((unsigned long)c
->ip
[2] << 8L) | ((unsigned long)c
->ip
[3]);
195 c
->them
.sin_addr
.s_addr
= htonl(l
);
196 c
->state
= BIO_CONN_S_CREATE_SOCKET
;
198 ret
= socket(AF_INET
, SOCK_STREAM
, SOCKET_PROTOCOL
);
199 if (ret
== INVALID_SOCKET
) {
200 SYSerr(SYS_F_SOCKET
, get_last_socket_error());
201 ERR_add_error_data(4, "host=", c
->param_hostname
,
203 BIOerr(BIO_F_CONN_STATE
, BIO_R_UNABLE_TO_CREATE_SOCKET
);
207 c
->state
= BIO_CONN_S_NBIO
;
210 case BIO_CONN_S_NBIO
:
212 if (!BIO_socket_nbio(b
->num
, 1)) {
213 BIOerr(BIO_F_CONN_STATE
, BIO_R_ERROR_SETTING_NBIO
);
214 ERR_add_error_data(4, "host=",
215 c
->param_hostname
, ":", c
->param_port
);
219 c
->state
= BIO_CONN_S_CONNECT
;
221 # if defined(SO_KEEPALIVE) && !defined(OPENSSL_SYS_MPE)
223 i
= setsockopt(b
->num
, SOL_SOCKET
, SO_KEEPALIVE
, (char *)&i
,
226 SYSerr(SYS_F_SOCKET
, get_last_socket_error());
227 ERR_add_error_data(4, "host=", c
->param_hostname
,
229 BIOerr(BIO_F_CONN_STATE
, BIO_R_KEEPALIVE
);
235 case BIO_CONN_S_CONNECT
:
236 BIO_clear_retry_flags(b
);
237 ret
= connect(b
->num
,
238 (struct sockaddr
*)&c
->them
, sizeof(c
->them
));
241 if (BIO_sock_should_retry(ret
)) {
242 BIO_set_retry_special(b
);
243 c
->state
= BIO_CONN_S_BLOCKED_CONNECT
;
244 b
->retry_reason
= BIO_RR_CONNECT
;
246 SYSerr(SYS_F_CONNECT
, get_last_socket_error());
247 ERR_add_error_data(4, "host=",
248 c
->param_hostname
, ":", c
->param_port
);
249 BIOerr(BIO_F_CONN_STATE
, BIO_R_CONNECT_ERROR
);
253 c
->state
= BIO_CONN_S_OK
;
256 case BIO_CONN_S_BLOCKED_CONNECT
:
257 i
= BIO_sock_error(b
->num
);
259 BIO_clear_retry_flags(b
);
260 SYSerr(SYS_F_CONNECT
, i
);
261 ERR_add_error_data(4, "host=",
262 c
->param_hostname
, ":", c
->param_port
);
263 BIOerr(BIO_F_CONN_STATE
, BIO_R_NBIO_CONNECT_ERROR
);
267 c
->state
= BIO_CONN_S_OK
;
279 if (!(ret
= cb((BIO
*)b
, c
->state
, ret
)))
284 /* Loop does not exit */
287 ret
= cb((BIO
*)b
, c
->state
, ret
);
292 BIO_CONNECT
*BIO_CONNECT_new(void)
296 if ((ret
= (BIO_CONNECT
*)OPENSSL_malloc(sizeof(BIO_CONNECT
))) == NULL
)
298 ret
->state
= BIO_CONN_S_BEFORE
;
299 ret
->param_hostname
= NULL
;
300 ret
->param_port
= NULL
;
301 ret
->info_callback
= NULL
;
308 memset((char *)&ret
->them
, 0, sizeof(ret
->them
));
312 void BIO_CONNECT_free(BIO_CONNECT
*a
)
317 if (a
->param_hostname
!= NULL
)
318 OPENSSL_free(a
->param_hostname
);
319 if (a
->param_port
!= NULL
)
320 OPENSSL_free(a
->param_port
);
324 BIO_METHOD
*BIO_s_connect(void)
326 return (&methods_connectp
);
329 static int conn_new(BIO
*bi
)
332 bi
->num
= INVALID_SOCKET
;
334 if ((bi
->ptr
= (char *)BIO_CONNECT_new()) == NULL
)
340 static void conn_close_socket(BIO
*bio
)
344 c
= (BIO_CONNECT
*)bio
->ptr
;
345 if (bio
->num
!= INVALID_SOCKET
) {
346 /* Only do a shutdown if things were established */
347 if (c
->state
== BIO_CONN_S_OK
)
348 shutdown(bio
->num
, 2);
349 closesocket(bio
->num
);
350 bio
->num
= INVALID_SOCKET
;
354 static int conn_free(BIO
*a
)
360 data
= (BIO_CONNECT
*)a
->ptr
;
363 conn_close_socket(a
);
364 BIO_CONNECT_free(data
);
372 static int conn_read(BIO
*b
, char *out
, int outl
)
377 data
= (BIO_CONNECT
*)b
->ptr
;
378 if (data
->state
!= BIO_CONN_S_OK
) {
379 ret
= conn_state(b
, data
);
385 clear_socket_error();
386 ret
= readsocket(b
->num
, out
, outl
);
387 BIO_clear_retry_flags(b
);
389 if (BIO_sock_should_retry(ret
))
390 BIO_set_retry_read(b
);
396 static int conn_write(BIO
*b
, const char *in
, int inl
)
401 data
= (BIO_CONNECT
*)b
->ptr
;
402 if (data
->state
!= BIO_CONN_S_OK
) {
403 ret
= conn_state(b
, data
);
408 clear_socket_error();
409 ret
= writesocket(b
->num
, in
, inl
);
410 BIO_clear_retry_flags(b
);
412 if (BIO_sock_should_retry(ret
))
413 BIO_set_retry_write(b
);
418 static long conn_ctrl(BIO
*b
, int cmd
, long num
, void *ptr
)
426 data
= (BIO_CONNECT
*)b
->ptr
;
431 data
->state
= BIO_CONN_S_BEFORE
;
432 conn_close_socket(b
);
435 case BIO_C_DO_STATE_MACHINE
:
436 /* use this one to start the connection */
437 if (data
->state
!= BIO_CONN_S_OK
)
438 ret
= (long)conn_state(b
, data
);
442 case BIO_C_GET_CONNECT
:
444 pptr
= (const char **)ptr
;
446 *pptr
= data
->param_hostname
;
448 } else if (num
== 1) {
449 *pptr
= data
->param_port
;
450 } else if (num
== 2) {
451 *pptr
= (char *)&(data
->ip
[0]);
452 } else if (num
== 3) {
453 *((int *)ptr
) = data
->port
;
455 if ((!b
->init
) || (ptr
== NULL
))
456 *pptr
= "not initialized";
460 case BIO_C_SET_CONNECT
:
464 if (data
->param_hostname
!= NULL
)
465 OPENSSL_free(data
->param_hostname
);
466 data
->param_hostname
= BUF_strdup(ptr
);
467 } else if (num
== 1) {
468 if (data
->param_port
!= NULL
)
469 OPENSSL_free(data
->param_port
);
470 data
->param_port
= BUF_strdup(ptr
);
471 } else if (num
== 2) {
473 unsigned char *p
= ptr
;
475 BIO_snprintf(buf
, sizeof buf
, "%d.%d.%d.%d",
476 p
[0], p
[1], p
[2], p
[3]);
477 if (data
->param_hostname
!= NULL
)
478 OPENSSL_free(data
->param_hostname
);
479 data
->param_hostname
= BUF_strdup(buf
);
480 memcpy(&(data
->ip
[0]), ptr
, 4);
481 } else if (num
== 3) {
482 char buf
[DECIMAL_SIZE(int) + 1];
484 BIO_snprintf(buf
, sizeof buf
, "%d", *(int *)ptr
);
485 if (data
->param_port
!= NULL
)
486 OPENSSL_free(data
->param_port
);
487 data
->param_port
= BUF_strdup(buf
);
488 data
->port
= *(int *)ptr
;
493 data
->nbio
= (int)num
;
504 case BIO_CTRL_GET_CLOSE
:
507 case BIO_CTRL_SET_CLOSE
:
508 b
->shutdown
= (int)num
;
510 case BIO_CTRL_PENDING
:
511 case BIO_CTRL_WPENDING
:
519 if (data
->param_port
)
520 BIO_set_conn_port(dbio
, data
->param_port
);
521 if (data
->param_hostname
)
522 BIO_set_conn_hostname(dbio
, data
->param_hostname
);
523 BIO_set_nbio(dbio
, data
->nbio
);
525 * FIXME: the cast of the function seems unlikely to be a good
528 (void)BIO_set_info_callback(dbio
,
529 (bio_info_cb
*)data
->info_callback
);
532 case BIO_CTRL_SET_CALLBACK
:
534 # if 0 /* FIXME: Should this be used? -- Richard
536 BIOerr(BIO_F_CONN_CTRL
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
543 case BIO_CTRL_GET_CALLBACK
:
545 int (**fptr
) (const BIO
*bio
, int state
, int xret
);
547 fptr
= (int (**)(const BIO
*bio
, int state
, int xret
))ptr
;
548 *fptr
= data
->info_callback
;
558 static long conn_callback_ctrl(BIO
*b
, int cmd
, bio_info_cb
*fp
)
563 data
= (BIO_CONNECT
*)b
->ptr
;
566 case BIO_CTRL_SET_CALLBACK
:
568 data
->info_callback
=
569 (int (*)(const struct bio_st
*, int, int))fp
;
579 static int conn_puts(BIO
*bp
, const char *str
)
584 ret
= conn_write(bp
, str
, n
);
588 BIO
*BIO_new_connect(char *str
)
592 ret
= BIO_new(BIO_s_connect());
595 if (BIO_set_conn_hostname(ret
, str
))