463 lines
12 KiB
C
463 lines
12 KiB
C
/* 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(const 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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