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463 lines
12 KiB
463 lines
12 KiB
/* crypto/bio/bss_acpt.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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#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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#ifndef OPENSSL_NO_SOCK |
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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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# 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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typedef struct bio_accept_st { |
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int state; |
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char *param_addr; |
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int accept_sock; |
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int accept_nbio; |
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char *addr; |
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int nbio; |
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/* |
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* If 0, it means normal, if 1, do a connect on bind failure, and if |
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* there is no-one listening, bind with SO_REUSEADDR. If 2, always use |
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* SO_REUSEADDR. |
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*/ |
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int bind_mode; |
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BIO *bio_chain; |
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} BIO_ACCEPT; |
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static int acpt_write(BIO *h, const char *buf, int num); |
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static int acpt_read(BIO *h, char *buf, int size); |
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static int acpt_puts(BIO *h, const char *str); |
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static long acpt_ctrl(BIO *h, int cmd, long arg1, void *arg2); |
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static int acpt_new(BIO *h); |
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static int acpt_free(BIO *data); |
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static int acpt_state(BIO *b, BIO_ACCEPT *c); |
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static void acpt_close_socket(BIO *data); |
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static BIO_ACCEPT *BIO_ACCEPT_new(void); |
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static void BIO_ACCEPT_free(BIO_ACCEPT *a); |
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# define ACPT_S_BEFORE 1 |
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# define ACPT_S_GET_ACCEPT_SOCKET 2 |
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# define ACPT_S_OK 3 |
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static BIO_METHOD methods_acceptp = { |
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BIO_TYPE_ACCEPT, |
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"socket accept", |
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acpt_write, |
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acpt_read, |
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acpt_puts, |
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NULL, /* connect_gets, */ |
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acpt_ctrl, |
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acpt_new, |
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acpt_free, |
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NULL, |
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}; |
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BIO_METHOD *BIO_s_accept(void) |
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{ |
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return (&methods_acceptp); |
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} |
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static int acpt_new(BIO *bi) |
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{ |
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BIO_ACCEPT *ba; |
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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 ((ba = BIO_ACCEPT_new()) == NULL) |
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return (0); |
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bi->ptr = (char *)ba; |
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ba->state = ACPT_S_BEFORE; |
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bi->shutdown = 1; |
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return (1); |
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} |
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static BIO_ACCEPT *BIO_ACCEPT_new(void) |
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{ |
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BIO_ACCEPT *ret; |
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if ((ret = (BIO_ACCEPT *)OPENSSL_malloc(sizeof(BIO_ACCEPT))) == NULL) |
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return (NULL); |
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memset(ret, 0, sizeof(BIO_ACCEPT)); |
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ret->accept_sock = INVALID_SOCKET; |
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ret->bind_mode = BIO_BIND_NORMAL; |
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return (ret); |
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} |
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static void BIO_ACCEPT_free(BIO_ACCEPT *a) |
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{ |
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if (a == NULL) |
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return; |
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if (a->param_addr != NULL) |
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OPENSSL_free(a->param_addr); |
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if (a->addr != NULL) |
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OPENSSL_free(a->addr); |
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if (a->bio_chain != NULL) |
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BIO_free(a->bio_chain); |
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OPENSSL_free(a); |
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} |
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static void acpt_close_socket(BIO *bio) |
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{ |
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BIO_ACCEPT *c; |
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c = (BIO_ACCEPT *)bio->ptr; |
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if (c->accept_sock != INVALID_SOCKET) { |
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shutdown(c->accept_sock, 2); |
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closesocket(c->accept_sock); |
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c->accept_sock = INVALID_SOCKET; |
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bio->num = INVALID_SOCKET; |
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} |
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} |
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static int acpt_free(BIO *a) |
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{ |
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BIO_ACCEPT *data; |
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if (a == NULL) |
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return (0); |
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data = (BIO_ACCEPT *)a->ptr; |
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if (a->shutdown) { |
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acpt_close_socket(a); |
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BIO_ACCEPT_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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static int acpt_state(BIO *b, BIO_ACCEPT *c) |
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{ |
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BIO *bio = NULL, *dbio; |
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int s = -1; |
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int i; |
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again: |
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switch (c->state) { |
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case ACPT_S_BEFORE: |
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if (c->param_addr == NULL) { |
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BIOerr(BIO_F_ACPT_STATE, BIO_R_NO_ACCEPT_PORT_SPECIFIED); |
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return (-1); |
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} |
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s = BIO_get_accept_socket(c->param_addr, c->bind_mode); |
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if (s == INVALID_SOCKET) |
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return (-1); |
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if (c->accept_nbio) { |
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if (!BIO_socket_nbio(s, 1)) { |
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closesocket(s); |
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BIOerr(BIO_F_ACPT_STATE, |
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BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET); |
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return (-1); |
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} |
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} |
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c->accept_sock = s; |
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b->num = s; |
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c->state = ACPT_S_GET_ACCEPT_SOCKET; |
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return (1); |
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/* break; */ |
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case ACPT_S_GET_ACCEPT_SOCKET: |
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if (b->next_bio != NULL) { |
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c->state = ACPT_S_OK; |
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goto again; |
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} |
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BIO_clear_retry_flags(b); |
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b->retry_reason = 0; |
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i = BIO_accept(c->accept_sock, &(c->addr)); |
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/* -2 return means we should retry */ |
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if (i == -2) { |
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BIO_set_retry_special(b); |
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b->retry_reason = BIO_RR_ACCEPT; |
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return -1; |
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} |
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if (i < 0) |
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return (i); |
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bio = BIO_new_socket(i, BIO_CLOSE); |
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if (bio == NULL) |
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goto err; |
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BIO_set_callback(bio, BIO_get_callback(b)); |
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BIO_set_callback_arg(bio, BIO_get_callback_arg(b)); |
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if (c->nbio) { |
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if (!BIO_socket_nbio(i, 1)) { |
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BIOerr(BIO_F_ACPT_STATE, |
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BIO_R_ERROR_SETTING_NBIO_ON_ACCEPTED_SOCKET); |
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goto err; |
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} |
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} |
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/* |
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* If the accept BIO has an bio_chain, we dup it and put the new |
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* socket at the end. |
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*/ |
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if (c->bio_chain != NULL) { |
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if ((dbio = BIO_dup_chain(c->bio_chain)) == NULL) |
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goto err; |
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if (!BIO_push(dbio, bio)) |
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goto err; |
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bio = dbio; |
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} |
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if (BIO_push(b, bio) == NULL) |
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goto err; |
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c->state = ACPT_S_OK; |
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return (1); |
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err: |
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if (bio != NULL) |
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BIO_free(bio); |
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else if (s >= 0) |
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closesocket(s); |
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return (0); |
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/* break; */ |
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case ACPT_S_OK: |
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if (b->next_bio == NULL) { |
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c->state = ACPT_S_GET_ACCEPT_SOCKET; |
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goto again; |
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} |
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return (1); |
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/* break; */ |
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default: |
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return (0); |
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/* break; */ |
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} |
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} |
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static int acpt_read(BIO *b, char *out, int outl) |
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{ |
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int ret = 0; |
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BIO_ACCEPT *data; |
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BIO_clear_retry_flags(b); |
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data = (BIO_ACCEPT *)b->ptr; |
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while (b->next_bio == NULL) { |
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ret = acpt_state(b, data); |
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if (ret <= 0) |
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return (ret); |
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} |
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ret = BIO_read(b->next_bio, out, outl); |
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BIO_copy_next_retry(b); |
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return (ret); |
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} |
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static int acpt_write(BIO *b, const char *in, int inl) |
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{ |
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int ret; |
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BIO_ACCEPT *data; |
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BIO_clear_retry_flags(b); |
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data = (BIO_ACCEPT *)b->ptr; |
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while (b->next_bio == NULL) { |
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ret = acpt_state(b, data); |
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if (ret <= 0) |
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return (ret); |
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} |
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ret = BIO_write(b->next_bio, in, inl); |
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BIO_copy_next_retry(b); |
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return (ret); |
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} |
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static long acpt_ctrl(BIO *b, int cmd, long num, void *ptr) |
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{ |
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int *ip; |
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long ret = 1; |
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BIO_ACCEPT *data; |
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char **pp; |
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data = (BIO_ACCEPT *)b->ptr; |
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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 = ACPT_S_BEFORE; |
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acpt_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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ret = (long)acpt_state(b, data); |
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break; |
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case BIO_C_SET_ACCEPT: |
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if (ptr != NULL) { |
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if (num == 0) { |
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b->init = 1; |
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if (data->param_addr != NULL) |
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OPENSSL_free(data->param_addr); |
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data->param_addr = BUF_strdup(ptr); |
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} else if (num == 1) { |
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data->accept_nbio = (ptr != NULL); |
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} else if (num == 2) { |
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if (data->bio_chain != NULL) |
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BIO_free(data->bio_chain); |
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data->bio_chain = (BIO *)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_SET_FD: |
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b->init = 1; |
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b->num = *((int *)ptr); |
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data->accept_sock = b->num; |
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data->state = ACPT_S_GET_ACCEPT_SOCKET; |
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b->shutdown = (int)num; |
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b->init = 1; |
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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 = data->accept_sock; |
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ret = data->accept_sock; |
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} else |
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ret = -1; |
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break; |
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case BIO_C_GET_ACCEPT: |
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if (b->init) { |
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if (ptr != NULL) { |
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pp = (char **)ptr; |
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*pp = data->param_addr; |
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} else |
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ret = -1; |
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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_C_SET_BIND_MODE: |
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data->bind_mode = (int)num; |
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break; |
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case BIO_C_GET_BIND_MODE: |
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ret = (long)data->bind_mode; |
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break; |
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case BIO_CTRL_DUP: |
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/*- dbio=(BIO *)ptr; |
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if (data->param_port) EAY EAY |
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BIO_set_port(dbio,data->param_port); |
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if (data->param_hostname) |
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BIO_set_hostname(dbio,data->param_hostname); |
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BIO_set_nbio(dbio,data->nbio); */ |
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break; |
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default: |
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ret = 0; |
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break; |
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} |
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return (ret); |
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} |
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static int acpt_puts(BIO *bp, const char *str) |
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{ |
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int n, ret; |
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n = strlen(str); |
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ret = acpt_write(bp, str, n); |
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return (ret); |
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} |
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BIO *BIO_new_accept(char *str) |
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{ |
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BIO *ret; |
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ret = BIO_new(BIO_s_accept()); |
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if (ret == NULL) |
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return (NULL); |
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if (BIO_set_accept_port(ret, str)) |
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return (ret); |
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else { |
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BIO_free(ret); |
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return (NULL); |
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} |
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} |
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#endif
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