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