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)
422 const char **pptr = NULL;
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;
451 *pptr = data->param_hostname;
452 } else if (num == 1) {
453 *pptr = data->param_port;
454 } else if (num == 2) {
455 *pptr = (char *)&(data->ip[0]);
465 *pptr = "not initialized";
469 case BIO_C_SET_CONNECT:
473 if (data->param_hostname != NULL)
474 OPENSSL_free(data->param_hostname);
475 data->param_hostname = BUF_strdup(ptr);
476 } else if (num == 1) {
477 if (data->param_port != NULL)
478 OPENSSL_free(data->param_port);
479 data->param_port = BUF_strdup(ptr);
480 } else if (num == 2) {
482 unsigned char *p = ptr;
484 BIO_snprintf(buf, sizeof buf, "%d.%d.%d.%d",
485 p[0], p[1], p[2], p[3]);
486 if (data->param_hostname != NULL)
487 OPENSSL_free(data->param_hostname);
488 data->param_hostname = BUF_strdup(buf);
489 memcpy(&(data->ip[0]), ptr, 4);
490 } else if (num == 3) {
491 char buf[DECIMAL_SIZE(int) + 1];
493 BIO_snprintf(buf, sizeof buf, "%d", *(int *)ptr);
494 if (data->param_port != NULL)
495 OPENSSL_free(data->param_port);
496 data->param_port = BUF_strdup(buf);
497 data->port = *(int *)ptr;
502 data->nbio = (int)num;
513 case BIO_CTRL_GET_CLOSE:
516 case BIO_CTRL_SET_CLOSE:
517 b->shutdown = (int)num;
519 case BIO_CTRL_PENDING:
520 case BIO_CTRL_WPENDING:
528 if (data->param_port)
529 BIO_set_conn_port(dbio, data->param_port);
530 if (data->param_hostname)
531 BIO_set_conn_hostname(dbio, data->param_hostname);
532 BIO_set_nbio(dbio, data->nbio);
534 * FIXME: the cast of the function seems unlikely to be a good
537 (void)BIO_set_info_callback(dbio,
538 (bio_info_cb *)data->info_callback);
541 case BIO_CTRL_SET_CALLBACK:
543 # if 0 /* FIXME: Should this be used? -- Richard
545 BIOerr(BIO_F_CONN_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
552 case BIO_CTRL_GET_CALLBACK:
554 int (**fptr) (const BIO *bio, int state, int xret);
556 fptr = (int (**)(const BIO *bio, int state, int xret))ptr;
557 *fptr = data->info_callback;
567 static long conn_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
572 data = (BIO_CONNECT *)b->ptr;
575 case BIO_CTRL_SET_CALLBACK:
577 data->info_callback =
578 (int (*)(const struct bio_st *, int, int))fp;
588 static int conn_puts(BIO *bp, const char *str)
593 ret = conn_write(bp, str, n);
597 BIO *BIO_new_connect(const char *str)
601 ret = BIO_new(BIO_s_connect());
604 if (BIO_set_conn_hostname(ret, str))