479 lines
11 KiB
C
479 lines
11 KiB
C
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/* 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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{
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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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/* If 0, it means normal, if 1, do a connect on bind failure,
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* and if there is no-one listening, bind with SO_REUSEADDR.
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* If 2, always use SO_REUSEADDR. */
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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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{
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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) OPENSSL_free(a->param_addr);
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if (a->addr != NULL) OPENSSL_free(a->addr);
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if (a->bio_chain != NULL) 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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{
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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) return(0);
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data=(BIO_ACCEPT *)a->ptr;
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if (a->shutdown)
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{
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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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{
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case ACPT_S_BEFORE:
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if (c->param_addr == NULL)
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{
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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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{
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if (!BIO_socket_nbio(s,1))
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{
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closesocket(s);
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BIOerr(BIO_F_ACPT_STATE,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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{
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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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{
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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) return(i);
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bio=BIO_new_socket(i,BIO_CLOSE);
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if (bio == NULL) 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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{
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if (!BIO_socket_nbio(i,1))
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{
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BIOerr(BIO_F_ACPT_STATE,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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/* If the accept BIO has an bio_chain, we dup it and
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* put the new socket at the end. */
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if (c->bio_chain != NULL)
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{
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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)) goto err;
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bio=dbio;
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}
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if (BIO_push(b,bio) == NULL) 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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{
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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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{
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ret=acpt_state(b,data);
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if (ret <= 0) 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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{
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ret=acpt_state(b,data);
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if (ret <= 0) 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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{
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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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{
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if (num == 0)
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{
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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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}
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else if (num == 1)
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{
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data->accept_nbio=(ptr != NULL);
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}
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else if (num == 2)
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{
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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;
|
||
|
|
break;
|
||
|
|
case BIO_C_SET_FD:
|
||
|
|
b->init=1;
|
||
|
|
b->num= *((int *)ptr);
|
||
|
|
data->accept_sock=b->num;
|
||
|
|
data->state=ACPT_S_GET_ACCEPT_SOCKET;
|
||
|
|
b->shutdown=(int)num;
|
||
|
|
b->init=1;
|
||
|
|
break;
|
||
|
|
case BIO_C_GET_FD:
|
||
|
|
if (b->init)
|
||
|
|
{
|
||
|
|
ip=(int *)ptr;
|
||
|
|
if (ip != NULL)
|
||
|
|
*ip=data->accept_sock;
|
||
|
|
ret=data->accept_sock;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
ret= -1;
|
||
|
|
break;
|
||
|
|
case BIO_C_GET_ACCEPT:
|
||
|
|
if (b->init)
|
||
|
|
{
|
||
|
|
if (ptr != NULL)
|
||
|
|
{
|
||
|
|
pp=(char **)ptr;
|
||
|
|
*pp=data->param_addr;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
ret= -1;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
ret= -1;
|
||
|
|
break;
|
||
|
|
case BIO_CTRL_GET_CLOSE:
|
||
|
|
ret=b->shutdown;
|
||
|
|
break;
|
||
|
|
case BIO_CTRL_SET_CLOSE:
|
||
|
|
b->shutdown=(int)num;
|
||
|
|
break;
|
||
|
|
case BIO_CTRL_PENDING:
|
||
|
|
case BIO_CTRL_WPENDING:
|
||
|
|
ret=0;
|
||
|
|
break;
|
||
|
|
case BIO_CTRL_FLUSH:
|
||
|
|
break;
|
||
|
|
case BIO_C_SET_BIND_MODE:
|
||
|
|
data->bind_mode=(int)num;
|
||
|
|
break;
|
||
|
|
case BIO_C_GET_BIND_MODE:
|
||
|
|
ret=(long)data->bind_mode;
|
||
|
|
break;
|
||
|
|
case BIO_CTRL_DUP:
|
||
|
|
/* dbio=(BIO *)ptr;
|
||
|
|
if (data->param_port) EAY EAY
|
||
|
|
BIO_set_port(dbio,data->param_port);
|
||
|
|
if (data->param_hostname)
|
||
|
|
BIO_set_hostname(dbio,data->param_hostname);
|
||
|
|
BIO_set_nbio(dbio,data->nbio); */
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
ret=0;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return(ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int acpt_puts(BIO *bp, const char *str)
|
||
|
|
{
|
||
|
|
int n,ret;
|
||
|
|
|
||
|
|
n=strlen(str);
|
||
|
|
ret=acpt_write(bp,str,n);
|
||
|
|
return(ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
BIO *BIO_new_accept(char *str)
|
||
|
|
{
|
||
|
|
BIO *ret;
|
||
|
|
|
||
|
|
ret=BIO_new(BIO_s_accept());
|
||
|
|
if (ret == NULL) return(NULL);
|
||
|
|
if (BIO_set_accept_port(ret,str))
|
||
|
|
return(ret);
|
||
|
|
else
|
||
|
|
{
|
||
|
|
BIO_free(ret);
|
||
|
|
return(NULL);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|