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.]
62 #include "internal/cryptlib.h"
63 #include <openssl/bio.h>
65 #ifndef OPENSSL_NO_SOCK
67 # if (defined(OPENSSL_SYS_VMS) && __VMS_VER < 70000000)
68 /* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */
72 typedef struct bio_connect_st {
79 struct sockaddr_in them;
81 * int socket; this will be kept in bio->num so that it is compatible
82 * with the bss_sock bio
85 * called when the connection is initially made callback(BIO,state,ret);
86 * The callback should return 'ret'. state is for compatibility with the
89 int (*info_callback) (const BIO *bio, int state, int ret);
92 static int conn_write(BIO *h, const char *buf, int num);
93 static int conn_read(BIO *h, char *buf, int size);
94 static int conn_puts(BIO *h, const char *str);
95 static long conn_ctrl(BIO *h, int cmd, long arg1, void *arg2);
96 static int conn_new(BIO *h);
97 static int conn_free(BIO *data);
98 static long conn_callback_ctrl(BIO *h, int cmd, bio_info_cb *);
100 static int conn_state(BIO *b, BIO_CONNECT *c);
101 static void conn_close_socket(BIO *data);
102 BIO_CONNECT *BIO_CONNECT_new(void);
103 void BIO_CONNECT_free(BIO_CONNECT *a);
105 static BIO_METHOD methods_connectp = {
111 NULL, /* connect_gets, */
118 static int conn_state(BIO *b, BIO_CONNECT *c)
123 int (*cb) (const BIO *, int, int) = NULL;
125 if (c->info_callback != NULL)
126 cb = c->info_callback;
130 case BIO_CONN_S_BEFORE:
131 p = c->param_hostname;
133 BIOerr(BIO_F_CONN_STATE, BIO_R_NO_HOSTNAME_SPECIFIED);
136 for (; *p != '\0'; p++) {
137 if ((*p == ':') || (*p == '/'))
142 if ((i == ':') || (i == '/')) {
151 OPENSSL_free(c->param_port);
152 c->param_port = BUF_strdup(p);
156 if (c->param_port == NULL) {
157 BIOerr(BIO_F_CONN_STATE, BIO_R_NO_PORT_SPECIFIED);
158 ERR_add_error_data(2, "host=", c->param_hostname);
161 c->state = BIO_CONN_S_GET_IP;
164 case BIO_CONN_S_GET_IP:
165 if (BIO_get_host_ip(c->param_hostname, &(c->ip[0])) <= 0)
167 c->state = BIO_CONN_S_GET_PORT;
170 case BIO_CONN_S_GET_PORT:
171 if (c->param_port == NULL) {
174 } else if (BIO_get_port(c->param_port, &c->port) <= 0)
176 c->state = BIO_CONN_S_CREATE_SOCKET;
179 case BIO_CONN_S_CREATE_SOCKET:
180 /* now setup address */
181 memset(&c->them, 0, sizeof(c->them));
182 c->them.sin_family = AF_INET;
183 c->them.sin_port = htons((unsigned short)c->port);
185 ((unsigned long)c->ip[0] << 24L) |
186 ((unsigned long)c->ip[1] << 16L) |
187 ((unsigned long)c->ip[2] << 8L) | ((unsigned long)c->ip[3]);
188 c->them.sin_addr.s_addr = htonl(l);
189 c->state = BIO_CONN_S_CREATE_SOCKET;
191 ret = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
192 if (ret == (int)INVALID_SOCKET) {
193 SYSerr(SYS_F_SOCKET, get_last_socket_error());
194 ERR_add_error_data(4, "host=", c->param_hostname,
196 BIOerr(BIO_F_CONN_STATE, BIO_R_UNABLE_TO_CREATE_SOCKET);
200 c->state = BIO_CONN_S_NBIO;
203 case BIO_CONN_S_NBIO:
205 if (!BIO_socket_nbio(b->num, 1)) {
206 BIOerr(BIO_F_CONN_STATE, BIO_R_ERROR_SETTING_NBIO);
207 ERR_add_error_data(4, "host=",
208 c->param_hostname, ":", c->param_port);
212 c->state = BIO_CONN_S_CONNECT;
214 # if defined(SO_KEEPALIVE)
216 i = setsockopt(b->num, SOL_SOCKET, SO_KEEPALIVE, (char *)&i,
219 SYSerr(SYS_F_SOCKET, get_last_socket_error());
220 ERR_add_error_data(4, "host=", c->param_hostname,
222 BIOerr(BIO_F_CONN_STATE, BIO_R_KEEPALIVE);
228 case BIO_CONN_S_CONNECT:
229 BIO_clear_retry_flags(b);
230 ret = connect(b->num,
231 (struct sockaddr *)&c->them, sizeof(c->them));
234 if (BIO_sock_should_retry(ret)) {
235 BIO_set_retry_special(b);
236 c->state = BIO_CONN_S_BLOCKED_CONNECT;
237 b->retry_reason = BIO_RR_CONNECT;
239 SYSerr(SYS_F_CONNECT, get_last_socket_error());
240 ERR_add_error_data(4, "host=",
241 c->param_hostname, ":", c->param_port);
242 BIOerr(BIO_F_CONN_STATE, BIO_R_CONNECT_ERROR);
246 c->state = BIO_CONN_S_OK;
249 case BIO_CONN_S_BLOCKED_CONNECT:
250 i = BIO_sock_error(b->num);
252 BIO_clear_retry_flags(b);
253 SYSerr(SYS_F_CONNECT, i);
254 ERR_add_error_data(4, "host=",
255 c->param_hostname, ":", c->param_port);
256 BIOerr(BIO_F_CONN_STATE, BIO_R_NBIO_CONNECT_ERROR);
260 c->state = BIO_CONN_S_OK;
272 if ((ret = cb((BIO *)b, c->state, ret)) == 0)
277 /* Loop does not exit */
280 ret = cb((BIO *)b, c->state, ret);
285 BIO_CONNECT *BIO_CONNECT_new(void)
289 if ((ret = OPENSSL_zalloc(sizeof(*ret))) == NULL)
291 ret->state = BIO_CONN_S_BEFORE;
292 ret->param_hostname = NULL;
293 ret->param_port = NULL;
294 ret->info_callback = NULL;
298 void BIO_CONNECT_free(BIO_CONNECT *a)
303 OPENSSL_free(a->param_hostname);
304 OPENSSL_free(a->param_port);
308 BIO_METHOD *BIO_s_connect(void)
310 return (&methods_connectp);
313 static int conn_new(BIO *bi)
316 bi->num = (int)INVALID_SOCKET;
318 if ((bi->ptr = (char *)BIO_CONNECT_new()) == NULL)
324 static void conn_close_socket(BIO *bio)
328 c = (BIO_CONNECT *)bio->ptr;
329 if (bio->num != (int)INVALID_SOCKET) {
330 /* Only do a shutdown if things were established */
331 if (c->state == BIO_CONN_S_OK)
332 shutdown(bio->num, 2);
333 closesocket(bio->num);
334 bio->num = (int)INVALID_SOCKET;
338 static int conn_free(BIO *a)
344 data = (BIO_CONNECT *)a->ptr;
347 conn_close_socket(a);
348 BIO_CONNECT_free(data);
356 static int conn_read(BIO *b, char *out, int outl)
361 data = (BIO_CONNECT *)b->ptr;
362 if (data->state != BIO_CONN_S_OK) {
363 ret = conn_state(b, data);
369 clear_socket_error();
370 ret = readsocket(b->num, out, outl);
371 BIO_clear_retry_flags(b);
373 if (BIO_sock_should_retry(ret))
374 BIO_set_retry_read(b);
380 static int conn_write(BIO *b, const char *in, int inl)
385 data = (BIO_CONNECT *)b->ptr;
386 if (data->state != BIO_CONN_S_OK) {
387 ret = conn_state(b, data);
392 clear_socket_error();
393 ret = writesocket(b->num, in, inl);
394 BIO_clear_retry_flags(b);
396 if (BIO_sock_should_retry(ret))
397 BIO_set_retry_write(b);
402 static long conn_ctrl(BIO *b, int cmd, long num, void *ptr)
410 data = (BIO_CONNECT *)b->ptr;
415 data->state = BIO_CONN_S_BEFORE;
416 conn_close_socket(b);
419 case BIO_C_DO_STATE_MACHINE:
420 /* use this one to start the connection */
421 if (data->state != BIO_CONN_S_OK)
422 ret = (long)conn_state(b, data);
426 case BIO_C_GET_CONNECT:
428 pptr = (const char **)ptr;
430 *pptr = data->param_hostname;
432 } else if (num == 1) {
433 *pptr = data->param_port;
434 } else if (num == 2) {
435 *pptr = (char *)&(data->ip[0]);
436 } else if (num == 3) {
437 *((int *)ptr) = data->port;
439 if ((!b->init) || (ptr == NULL))
440 *pptr = "not initialized";
444 case BIO_C_SET_CONNECT:
448 OPENSSL_free(data->param_hostname);
449 data->param_hostname = BUF_strdup(ptr);
450 } else if (num == 1) {
451 OPENSSL_free(data->param_port);
452 data->param_port = BUF_strdup(ptr);
453 } else if (num == 2) {
455 unsigned char *p = ptr;
457 BIO_snprintf(buf, sizeof buf, "%d.%d.%d.%d",
458 p[0], p[1], p[2], p[3]);
459 OPENSSL_free(data->param_hostname);
460 data->param_hostname = BUF_strdup(buf);
461 memcpy(&(data->ip[0]), ptr, 4);
462 } else if (num == 3) {
463 char buf[DECIMAL_SIZE(int) + 1];
465 BIO_snprintf(buf, sizeof buf, "%d", *(int *)ptr);
466 OPENSSL_free(data->param_port);
467 data->param_port = BUF_strdup(buf);
468 data->port = *(int *)ptr;
473 data->nbio = (int)num;
484 case BIO_CTRL_GET_CLOSE:
487 case BIO_CTRL_SET_CLOSE:
488 b->shutdown = (int)num;
490 case BIO_CTRL_PENDING:
491 case BIO_CTRL_WPENDING:
499 if (data->param_port)
500 BIO_set_conn_port(dbio, data->param_port);
501 if (data->param_hostname)
502 BIO_set_conn_hostname(dbio, data->param_hostname);
503 BIO_set_nbio(dbio, data->nbio);
505 * FIXME: the cast of the function seems unlikely to be a good
508 (void)BIO_set_info_callback(dbio,
509 (bio_info_cb *)data->info_callback);
512 case BIO_CTRL_SET_CALLBACK:
514 # if 0 /* FIXME: Should this be used? -- Richard
516 BIOerr(BIO_F_CONN_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
523 case BIO_CTRL_GET_CALLBACK:
525 int (**fptr) (const BIO *bio, int state, int xret);
527 fptr = (int (**)(const BIO *bio, int state, int xret))ptr;
528 *fptr = data->info_callback;
538 static long conn_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
543 data = (BIO_CONNECT *)b->ptr;
546 case BIO_CTRL_SET_CALLBACK:
548 data->info_callback =
549 (int (*)(const struct bio_st *, int, int))fp;
559 static int conn_puts(BIO *bp, const char *str)
564 ret = conn_write(bp, str, n);
568 BIO *BIO_new_connect(const char *str)
572 ret = BIO_new(BIO_s_connect());
575 if (BIO_set_conn_hostname(ret, str))