| /* crypto/bio/bss_conn.c */ |
| /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| * All rights reserved. |
| * |
| * This package is an SSL implementation written |
| * by Eric Young (eay@cryptsoft.com). |
| * The implementation was written so as to conform with Netscapes SSL. |
| * |
| * This library is free for commercial and non-commercial use as long as |
| * the following conditions are aheared to. The following conditions |
| * apply to all code found in this distribution, be it the RC4, RSA, |
| * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| * included with this distribution is covered by the same copyright terms |
| * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| * |
| * Copyright remains Eric Young's, and as such any Copyright notices in |
| * the code are not to be removed. |
| * If this package is used in a product, Eric Young should be given attribution |
| * as the author of the parts of the library used. |
| * This can be in the form of a textual message at program startup or |
| * in documentation (online or textual) provided with the package. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * "This product includes cryptographic software written by |
| * Eric Young (eay@cryptsoft.com)" |
| * The word 'cryptographic' can be left out if the rouines from the library |
| * being used are not cryptographic related :-). |
| * 4. If you include any Windows specific code (or a derivative thereof) from |
| * the apps directory (application code) you must include an acknowledgement: |
| * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * The licence and distribution terms for any publically available version or |
| * derivative of this code cannot be changed. i.e. this code cannot simply be |
| * copied and put under another distribution licence |
| * [including the GNU Public Licence.] |
| */ |
| |
| #include <stdio.h> |
| #include <errno.h> |
| #define USE_SOCKETS |
| #include "cryptlib.h" |
| #include <openssl/bio.h> |
| |
| #ifndef OPENSSL_NO_SOCK |
| |
| # ifdef OPENSSL_SYS_WIN16 |
| # define SOCKET_PROTOCOL 0 /* more microsoft stupidity */ |
| # else |
| # define SOCKET_PROTOCOL IPPROTO_TCP |
| # endif |
| |
| # if (defined(OPENSSL_SYS_VMS) && __VMS_VER < 70000000) |
| /* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */ |
| # undef FIONBIO |
| # endif |
| |
| typedef struct bio_connect_st { |
| int state; |
| char *param_hostname; |
| char *param_port; |
| int nbio; |
| unsigned char ip[4]; |
| unsigned short port; |
| struct sockaddr_in them; |
| /* |
| * int socket; this will be kept in bio->num so that it is compatible |
| * with the bss_sock bio |
| */ |
| /* |
| * called when the connection is initially made callback(BIO,state,ret); |
| * The callback should return 'ret'. state is for compatibility with the |
| * ssl info_callback |
| */ |
| int (*info_callback) (const BIO *bio, int state, int ret); |
| } BIO_CONNECT; |
| |
| static int conn_write(BIO *h, const char *buf, int num); |
| static int conn_read(BIO *h, char *buf, int size); |
| static int conn_puts(BIO *h, const char *str); |
| static long conn_ctrl(BIO *h, int cmd, long arg1, void *arg2); |
| static int conn_new(BIO *h); |
| static int conn_free(BIO *data); |
| static long conn_callback_ctrl(BIO *h, int cmd, bio_info_cb *); |
| |
| static int conn_state(BIO *b, BIO_CONNECT *c); |
| static void conn_close_socket(BIO *data); |
| BIO_CONNECT *BIO_CONNECT_new(void); |
| void BIO_CONNECT_free(BIO_CONNECT *a); |
| |
| static BIO_METHOD methods_connectp = { |
| BIO_TYPE_CONNECT, |
| "socket connect", |
| conn_write, |
| conn_read, |
| conn_puts, |
| NULL, /* connect_gets, */ |
| conn_ctrl, |
| conn_new, |
| conn_free, |
| conn_callback_ctrl, |
| }; |
| |
| static int conn_state(BIO *b, BIO_CONNECT *c) |
| { |
| int ret = -1, i; |
| unsigned long l; |
| char *p, *q; |
| int (*cb) (const BIO *, int, int) = NULL; |
| |
| if (c->info_callback != NULL) |
| cb = c->info_callback; |
| |
| for (;;) { |
| switch (c->state) { |
| case BIO_CONN_S_BEFORE: |
| p = c->param_hostname; |
| if (p == NULL) { |
| BIOerr(BIO_F_CONN_STATE, BIO_R_NO_HOSTNAME_SPECIFIED); |
| goto exit_loop; |
| } |
| for (; *p != '\0'; p++) { |
| if ((*p == ':') || (*p == '/')) |
| break; |
| } |
| |
| i = *p; |
| if ((i == ':') || (i == '/')) { |
| |
| *(p++) = '\0'; |
| if (i == ':') { |
| for (q = p; *q; q++) |
| if (*q == '/') { |
| *q = '\0'; |
| break; |
| } |
| if (c->param_port != NULL) |
| OPENSSL_free(c->param_port); |
| c->param_port = BUF_strdup(p); |
| } |
| } |
| |
| if (c->param_port == NULL) { |
| BIOerr(BIO_F_CONN_STATE, BIO_R_NO_PORT_SPECIFIED); |
| ERR_add_error_data(2, "host=", c->param_hostname); |
| goto exit_loop; |
| } |
| c->state = BIO_CONN_S_GET_IP; |
| break; |
| |
| case BIO_CONN_S_GET_IP: |
| if (BIO_get_host_ip(c->param_hostname, &(c->ip[0])) <= 0) |
| goto exit_loop; |
| c->state = BIO_CONN_S_GET_PORT; |
| break; |
| |
| case BIO_CONN_S_GET_PORT: |
| if (c->param_port == NULL) { |
| /* abort(); */ |
| goto exit_loop; |
| } else if (BIO_get_port(c->param_port, &c->port) <= 0) |
| goto exit_loop; |
| c->state = BIO_CONN_S_CREATE_SOCKET; |
| break; |
| |
| case BIO_CONN_S_CREATE_SOCKET: |
| /* now setup address */ |
| memset((char *)&c->them, 0, sizeof(c->them)); |
| c->them.sin_family = AF_INET; |
| c->them.sin_port = htons((unsigned short)c->port); |
| l = (unsigned long) |
| ((unsigned long)c->ip[0] << 24L) | |
| ((unsigned long)c->ip[1] << 16L) | |
| ((unsigned long)c->ip[2] << 8L) | ((unsigned long)c->ip[3]); |
| c->them.sin_addr.s_addr = htonl(l); |
| c->state = BIO_CONN_S_CREATE_SOCKET; |
| |
| ret = socket(AF_INET, SOCK_STREAM, SOCKET_PROTOCOL); |
| if (ret == INVALID_SOCKET) { |
| SYSerr(SYS_F_SOCKET, get_last_socket_error()); |
| ERR_add_error_data(4, "host=", c->param_hostname, |
| ":", c->param_port); |
| BIOerr(BIO_F_CONN_STATE, BIO_R_UNABLE_TO_CREATE_SOCKET); |
| goto exit_loop; |
| } |
| b->num = ret; |
| c->state = BIO_CONN_S_NBIO; |
| break; |
| |
| case BIO_CONN_S_NBIO: |
| if (c->nbio) { |
| if (!BIO_socket_nbio(b->num, 1)) { |
| BIOerr(BIO_F_CONN_STATE, BIO_R_ERROR_SETTING_NBIO); |
| ERR_add_error_data(4, "host=", |
| c->param_hostname, ":", c->param_port); |
| goto exit_loop; |
| } |
| } |
| c->state = BIO_CONN_S_CONNECT; |
| |
| # if defined(SO_KEEPALIVE) && !defined(OPENSSL_SYS_MPE) |
| i = 1; |
| i = setsockopt(b->num, SOL_SOCKET, SO_KEEPALIVE, (char *)&i, |
| sizeof(i)); |
| if (i < 0) { |
| SYSerr(SYS_F_SOCKET, get_last_socket_error()); |
| ERR_add_error_data(4, "host=", c->param_hostname, |
| ":", c->param_port); |
| BIOerr(BIO_F_CONN_STATE, BIO_R_KEEPALIVE); |
| goto exit_loop; |
| } |
| # endif |
| break; |
| |
| case BIO_CONN_S_CONNECT: |
| BIO_clear_retry_flags(b); |
| ret = connect(b->num, |
| (struct sockaddr *)&c->them, sizeof(c->them)); |
| b->retry_reason = 0; |
| if (ret < 0) { |
| if (BIO_sock_should_retry(ret)) { |
| BIO_set_retry_special(b); |
| c->state = BIO_CONN_S_BLOCKED_CONNECT; |
| b->retry_reason = BIO_RR_CONNECT; |
| } else { |
| SYSerr(SYS_F_CONNECT, get_last_socket_error()); |
| ERR_add_error_data(4, "host=", |
| c->param_hostname, ":", c->param_port); |
| BIOerr(BIO_F_CONN_STATE, BIO_R_CONNECT_ERROR); |
| } |
| goto exit_loop; |
| } else |
| c->state = BIO_CONN_S_OK; |
| break; |
| |
| case BIO_CONN_S_BLOCKED_CONNECT: |
| i = BIO_sock_error(b->num); |
| if (i) { |
| BIO_clear_retry_flags(b); |
| SYSerr(SYS_F_CONNECT, i); |
| ERR_add_error_data(4, "host=", |
| c->param_hostname, ":", c->param_port); |
| BIOerr(BIO_F_CONN_STATE, BIO_R_NBIO_CONNECT_ERROR); |
| ret = 0; |
| goto exit_loop; |
| } else |
| c->state = BIO_CONN_S_OK; |
| break; |
| |
| case BIO_CONN_S_OK: |
| ret = 1; |
| goto exit_loop; |
| default: |
| /* abort(); */ |
| goto exit_loop; |
| } |
| |
| if (cb != NULL) { |
| if (!(ret = cb((BIO *)b, c->state, ret))) |
| goto end; |
| } |
| } |
| |
| /* Loop does not exit */ |
| exit_loop: |
| if (cb != NULL) |
| ret = cb((BIO *)b, c->state, ret); |
| end: |
| return (ret); |
| } |
| |
| BIO_CONNECT *BIO_CONNECT_new(void) |
| { |
| BIO_CONNECT *ret; |
| |
| if ((ret = (BIO_CONNECT *)OPENSSL_malloc(sizeof(BIO_CONNECT))) == NULL) |
| return (NULL); |
| ret->state = BIO_CONN_S_BEFORE; |
| ret->param_hostname = NULL; |
| ret->param_port = NULL; |
| ret->info_callback = NULL; |
| ret->nbio = 0; |
| ret->ip[0] = 0; |
| ret->ip[1] = 0; |
| ret->ip[2] = 0; |
| ret->ip[3] = 0; |
| ret->port = 0; |
| memset((char *)&ret->them, 0, sizeof(ret->them)); |
| return (ret); |
| } |
| |
| void BIO_CONNECT_free(BIO_CONNECT *a) |
| { |
| if (a == NULL) |
| return; |
| |
| if (a->param_hostname != NULL) |
| OPENSSL_free(a->param_hostname); |
| if (a->param_port != NULL) |
| OPENSSL_free(a->param_port); |
| OPENSSL_free(a); |
| } |
| |
| BIO_METHOD *BIO_s_connect(void) |
| { |
| return (&methods_connectp); |
| } |
| |
| static int conn_new(BIO *bi) |
| { |
| bi->init = 0; |
| bi->num = INVALID_SOCKET; |
| bi->flags = 0; |
| if ((bi->ptr = (char *)BIO_CONNECT_new()) == NULL) |
| return (0); |
| else |
| return (1); |
| } |
| |
| static void conn_close_socket(BIO *bio) |
| { |
| BIO_CONNECT *c; |
| |
| c = (BIO_CONNECT *)bio->ptr; |
| if (bio->num != INVALID_SOCKET) { |
| /* Only do a shutdown if things were established */ |
| if (c->state == BIO_CONN_S_OK) |
| shutdown(bio->num, 2); |
| closesocket(bio->num); |
| bio->num = INVALID_SOCKET; |
| } |
| } |
| |
| static int conn_free(BIO *a) |
| { |
| BIO_CONNECT *data; |
| |
| if (a == NULL) |
| return (0); |
| data = (BIO_CONNECT *)a->ptr; |
| |
| if (a->shutdown) { |
| conn_close_socket(a); |
| BIO_CONNECT_free(data); |
| a->ptr = NULL; |
| a->flags = 0; |
| a->init = 0; |
| } |
| return (1); |
| } |
| |
| static int conn_read(BIO *b, char *out, int outl) |
| { |
| int ret = 0; |
| BIO_CONNECT *data; |
| |
| data = (BIO_CONNECT *)b->ptr; |
| if (data->state != BIO_CONN_S_OK) { |
| ret = conn_state(b, data); |
| if (ret <= 0) |
| return (ret); |
| } |
| |
| if (out != NULL) { |
| clear_socket_error(); |
| ret = readsocket(b->num, out, outl); |
| BIO_clear_retry_flags(b); |
| if (ret <= 0) { |
| if (BIO_sock_should_retry(ret)) |
| BIO_set_retry_read(b); |
| } |
| } |
| return (ret); |
| } |
| |
| static int conn_write(BIO *b, const char *in, int inl) |
| { |
| int ret; |
| BIO_CONNECT *data; |
| |
| data = (BIO_CONNECT *)b->ptr; |
| if (data->state != BIO_CONN_S_OK) { |
| ret = conn_state(b, data); |
| if (ret <= 0) |
| return (ret); |
| } |
| |
| clear_socket_error(); |
| ret = writesocket(b->num, in, inl); |
| BIO_clear_retry_flags(b); |
| if (ret <= 0) { |
| if (BIO_sock_should_retry(ret)) |
| BIO_set_retry_write(b); |
| } |
| return (ret); |
| } |
| |
| static long conn_ctrl(BIO *b, int cmd, long num, void *ptr) |
| { |
| BIO *dbio; |
| int *ip; |
| const char **pptr = NULL; |
| long ret = 1; |
| BIO_CONNECT *data; |
| |
| data = (BIO_CONNECT *)b->ptr; |
| |
| switch (cmd) { |
| case BIO_CTRL_RESET: |
| ret = 0; |
| data->state = BIO_CONN_S_BEFORE; |
| conn_close_socket(b); |
| b->flags = 0; |
| break; |
| case BIO_C_DO_STATE_MACHINE: |
| /* use this one to start the connection */ |
| if (data->state != BIO_CONN_S_OK) |
| ret = (long)conn_state(b, data); |
| else |
| ret = 1; |
| break; |
| case BIO_C_GET_CONNECT: |
| if (ptr != NULL) { |
| pptr = (const char **)ptr; |
| } |
| |
| if (b->init) { |
| if (pptr != NULL) { |
| ret = 1; |
| if (num == 0) { |
| *pptr = data->param_hostname; |
| } else if (num == 1) { |
| *pptr = data->param_port; |
| } else if (num == 2) { |
| *pptr = (char *)&(data->ip[0]); |
| } else { |
| ret = 0; |
| } |
| } |
| if (num == 3) { |
| ret = data->port; |
| } |
| } else { |
| if (pptr != NULL) |
| *pptr = "not initialized"; |
| ret = 0; |
| } |
| break; |
| case BIO_C_SET_CONNECT: |
| if (ptr != NULL) { |
| b->init = 1; |
| if (num == 0) { |
| if (data->param_hostname != NULL) |
| OPENSSL_free(data->param_hostname); |
| data->param_hostname = BUF_strdup(ptr); |
| } else if (num == 1) { |
| if (data->param_port != NULL) |
| OPENSSL_free(data->param_port); |
| data->param_port = BUF_strdup(ptr); |
| } else if (num == 2) { |
| char buf[16]; |
| unsigned char *p = ptr; |
| |
| BIO_snprintf(buf, sizeof buf, "%d.%d.%d.%d", |
| p[0], p[1], p[2], p[3]); |
| if (data->param_hostname != NULL) |
| OPENSSL_free(data->param_hostname); |
| data->param_hostname = BUF_strdup(buf); |
| memcpy(&(data->ip[0]), ptr, 4); |
| } else if (num == 3) { |
| char buf[DECIMAL_SIZE(int) + 1]; |
| |
| BIO_snprintf(buf, sizeof buf, "%d", *(int *)ptr); |
| if (data->param_port != NULL) |
| OPENSSL_free(data->param_port); |
| data->param_port = BUF_strdup(buf); |
| data->port = *(int *)ptr; |
| } |
| } |
| break; |
| case BIO_C_SET_NBIO: |
| data->nbio = (int)num; |
| break; |
| case BIO_C_GET_FD: |
| if (b->init) { |
| ip = (int *)ptr; |
| if (ip != NULL) |
| *ip = b->num; |
| ret = b->num; |
| } else |
| ret = -1; |
| break; |
| case BIO_CTRL_GET_CLOSE: |
| ret = b->shutdown; |
| break; |
| case BIO_CTRL_SET_CLOSE: |
| b->shutdown = (int)num; |
| break; |
| case BIO_CTRL_PENDING: |
| case BIO_CTRL_WPENDING: |
| ret = 0; |
| break; |
| case BIO_CTRL_FLUSH: |
| break; |
| case BIO_CTRL_DUP: |
| { |
| dbio = (BIO *)ptr; |
| if (data->param_port) |
| BIO_set_conn_port(dbio, data->param_port); |
| if (data->param_hostname) |
| BIO_set_conn_hostname(dbio, data->param_hostname); |
| BIO_set_nbio(dbio, data->nbio); |
| /* |
| * FIXME: the cast of the function seems unlikely to be a good |
| * idea |
| */ |
| (void)BIO_set_info_callback(dbio, |
| (bio_info_cb *)data->info_callback); |
| } |
| break; |
| case BIO_CTRL_SET_CALLBACK: |
| { |
| # if 0 /* FIXME: Should this be used? -- Richard |
| * Levitte */ |
| BIOerr(BIO_F_CONN_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| ret = -1; |
| # else |
| ret = 0; |
| # endif |
| } |
| break; |
| case BIO_CTRL_GET_CALLBACK: |
| { |
| int (**fptr) (const BIO *bio, int state, int xret); |
| |
| fptr = (int (**)(const BIO *bio, int state, int xret))ptr; |
| *fptr = data->info_callback; |
| } |
| break; |
| default: |
| ret = 0; |
| break; |
| } |
| return (ret); |
| } |
| |
| static long conn_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) |
| { |
| long ret = 1; |
| BIO_CONNECT *data; |
| |
| data = (BIO_CONNECT *)b->ptr; |
| |
| switch (cmd) { |
| case BIO_CTRL_SET_CALLBACK: |
| { |
| data->info_callback = |
| (int (*)(const struct bio_st *, int, int))fp; |
| } |
| break; |
| default: |
| ret = 0; |
| break; |
| } |
| return (ret); |
| } |
| |
| static int conn_puts(BIO *bp, const char *str) |
| { |
| int n, ret; |
| |
| n = strlen(str); |
| ret = conn_write(bp, str, n); |
| return (ret); |
| } |
| |
| BIO *BIO_new_connect(char *str) |
| { |
| BIO *ret; |
| |
| ret = BIO_new(BIO_s_connect()); |
| if (ret == NULL) |
| return (NULL); |
| if (BIO_set_conn_hostname(ret, str)) |
| return (ret); |
| else { |
| BIO_free(ret); |
| return (NULL); |
| } |
| } |
| |
| #endif |
