| /* crypto/bio/bss_acpt.c */ |
| /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| * All rights reserved. |
| * |
| * This package is an SSL implementation written |
| * by Eric Young (eay@cryptsoft.com). |
| * The implementation was written so as to conform with Netscapes SSL. |
| * |
| * This library is free for commercial and non-commercial use as long as |
| * the following conditions are aheared to. The following conditions |
| * apply to all code found in this distribution, be it the RC4, RSA, |
| * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| * included with this distribution is covered by the same copyright terms |
| * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| * |
| * Copyright remains Eric Young's, and as such any Copyright notices in |
| * the code are not to be removed. |
| * If this package is used in a product, Eric Young should be given attribution |
| * as the author of the parts of the library used. |
| * This can be in the form of a textual message at program startup or |
| * in documentation (online or textual) provided with the package. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * "This product includes cryptographic software written by |
| * Eric Young (eay@cryptsoft.com)" |
| * The word 'cryptographic' can be left out if the rouines from the library |
| * being used are not cryptographic related :-). |
| * 4. If you include any Windows specific code (or a derivative thereof) from |
| * the apps directory (application code) you must include an acknowledgement: |
| * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * The licence and distribution terms for any publically available version or |
| * derivative of this code cannot be changed. i.e. this code cannot simply be |
| * copied and put under another distribution licence |
| * [including the GNU Public Licence.] |
| */ |
| |
| #include <stdio.h> |
| #include <errno.h> |
| #define USE_SOCKETS |
| #include "cryptlib.h" |
| #include <openssl/bio.h> |
| |
| #ifndef OPENSSL_NO_SOCK |
| |
| #ifdef OPENSSL_SYS_WIN16 |
| #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */ |
| #else |
| #define SOCKET_PROTOCOL IPPROTO_TCP |
| #endif |
| |
| #if (defined(OPENSSL_SYS_VMS) && __VMS_VER < 70000000) |
| /* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */ |
| #undef FIONBIO |
| #endif |
| |
| typedef struct bio_accept_st |
| { |
| int state; |
| char *param_addr; |
| |
| int accept_sock; |
| int accept_nbio; |
| |
| char *addr; |
| int nbio; |
| /* If 0, it means normal, if 1, do a connect on bind failure, |
| * and if there is no-one listening, bind with SO_REUSEADDR. |
| * If 2, always use SO_REUSEADDR. */ |
| int bind_mode; |
| BIO *bio_chain; |
| } BIO_ACCEPT; |
| |
| static int acpt_write(BIO *h, const char *buf, int num); |
| static int acpt_read(BIO *h, char *buf, int size); |
| static int acpt_puts(BIO *h, const char *str); |
| static long acpt_ctrl(BIO *h, int cmd, long arg1, void *arg2); |
| static int acpt_new(BIO *h); |
| static int acpt_free(BIO *data); |
| static int acpt_state(BIO *b, BIO_ACCEPT *c); |
| static void acpt_close_socket(BIO *data); |
| static BIO_ACCEPT *BIO_ACCEPT_new(void ); |
| static void BIO_ACCEPT_free(BIO_ACCEPT *a); |
| |
| #define ACPT_S_BEFORE 1 |
| #define ACPT_S_GET_ACCEPT_SOCKET 2 |
| #define ACPT_S_OK 3 |
| |
| static BIO_METHOD methods_acceptp= |
| { |
| BIO_TYPE_ACCEPT, |
| "socket accept", |
| acpt_write, |
| acpt_read, |
| acpt_puts, |
| NULL, /* connect_gets, */ |
| acpt_ctrl, |
| acpt_new, |
| acpt_free, |
| NULL, |
| }; |
| |
| BIO_METHOD *BIO_s_accept(void) |
| { |
| return(&methods_acceptp); |
| } |
| |
| static int acpt_new(BIO *bi) |
| { |
| BIO_ACCEPT *ba; |
| |
| bi->init=0; |
| bi->num=INVALID_SOCKET; |
| bi->flags=0; |
| if ((ba=BIO_ACCEPT_new()) == NULL) |
| return(0); |
| bi->ptr=(char *)ba; |
| ba->state=ACPT_S_BEFORE; |
| bi->shutdown=1; |
| return(1); |
| } |
| |
| static BIO_ACCEPT *BIO_ACCEPT_new(void) |
| { |
| BIO_ACCEPT *ret; |
| |
| if ((ret=(BIO_ACCEPT *)OPENSSL_malloc(sizeof(BIO_ACCEPT))) == NULL) |
| return(NULL); |
| |
| memset(ret,0,sizeof(BIO_ACCEPT)); |
| ret->accept_sock=INVALID_SOCKET; |
| ret->bind_mode=BIO_BIND_NORMAL; |
| return(ret); |
| } |
| |
| static void BIO_ACCEPT_free(BIO_ACCEPT *a) |
| { |
| if(a == NULL) |
| return; |
| |
| if (a->param_addr != NULL) OPENSSL_free(a->param_addr); |
| if (a->addr != NULL) OPENSSL_free(a->addr); |
| if (a->bio_chain != NULL) BIO_free(a->bio_chain); |
| OPENSSL_free(a); |
| } |
| |
| static void acpt_close_socket(BIO *bio) |
| { |
| BIO_ACCEPT *c; |
| |
| c=(BIO_ACCEPT *)bio->ptr; |
| if (c->accept_sock != INVALID_SOCKET) |
| { |
| shutdown(c->accept_sock,2); |
| closesocket(c->accept_sock); |
| c->accept_sock=INVALID_SOCKET; |
| bio->num=INVALID_SOCKET; |
| } |
| } |
| |
| static int acpt_free(BIO *a) |
| { |
| BIO_ACCEPT *data; |
| |
| if (a == NULL) return(0); |
| data=(BIO_ACCEPT *)a->ptr; |
| |
| if (a->shutdown) |
| { |
| acpt_close_socket(a); |
| BIO_ACCEPT_free(data); |
| a->ptr=NULL; |
| a->flags=0; |
| a->init=0; |
| } |
| return(1); |
| } |
| |
| static int acpt_state(BIO *b, BIO_ACCEPT *c) |
| { |
| BIO *bio=NULL,*dbio; |
| int s= -1; |
| int i; |
| |
| again: |
| switch (c->state) |
| { |
| case ACPT_S_BEFORE: |
| if (c->param_addr == NULL) |
| { |
| BIOerr(BIO_F_ACPT_STATE,BIO_R_NO_ACCEPT_PORT_SPECIFIED); |
| return(-1); |
| } |
| s=BIO_get_accept_socket(c->param_addr,c->bind_mode); |
| if (s == INVALID_SOCKET) |
| return(-1); |
| |
| if (c->accept_nbio) |
| { |
| if (!BIO_socket_nbio(s,1)) |
| { |
| closesocket(s); |
| BIOerr(BIO_F_ACPT_STATE,BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET); |
| return(-1); |
| } |
| } |
| c->accept_sock=s; |
| b->num=s; |
| c->state=ACPT_S_GET_ACCEPT_SOCKET; |
| return(1); |
| /* break; */ |
| case ACPT_S_GET_ACCEPT_SOCKET: |
| if (b->next_bio != NULL) |
| { |
| c->state=ACPT_S_OK; |
| goto again; |
| } |
| BIO_clear_retry_flags(b); |
| b->retry_reason=0; |
| i=BIO_accept(c->accept_sock,&(c->addr)); |
| |
| /* -2 return means we should retry */ |
| if(i == -2) |
| { |
| BIO_set_retry_special(b); |
| b->retry_reason=BIO_RR_ACCEPT; |
| return -1; |
| } |
| |
| if (i < 0) return(i); |
| |
| bio=BIO_new_socket(i,BIO_CLOSE); |
| if (bio == NULL) goto err; |
| |
| BIO_set_callback(bio,BIO_get_callback(b)); |
| BIO_set_callback_arg(bio,BIO_get_callback_arg(b)); |
| |
| if (c->nbio) |
| { |
| if (!BIO_socket_nbio(i,1)) |
| { |
| BIOerr(BIO_F_ACPT_STATE,BIO_R_ERROR_SETTING_NBIO_ON_ACCEPTED_SOCKET); |
| goto err; |
| } |
| } |
| |
| /* If the accept BIO has an bio_chain, we dup it and |
| * put the new socket at the end. */ |
| if (c->bio_chain != NULL) |
| { |
| if ((dbio=BIO_dup_chain(c->bio_chain)) == NULL) |
| goto err; |
| if (!BIO_push(dbio,bio)) goto err; |
| bio=dbio; |
| } |
| if (BIO_push(b,bio) == NULL) goto err; |
| |
| c->state=ACPT_S_OK; |
| return(1); |
| err: |
| if (bio != NULL) |
| BIO_free(bio); |
| else if (s >= 0) |
| closesocket(s); |
| return(0); |
| /* break; */ |
| case ACPT_S_OK: |
| if (b->next_bio == NULL) |
| { |
| c->state=ACPT_S_GET_ACCEPT_SOCKET; |
| goto again; |
| } |
| return(1); |
| /* break; */ |
| default: |
| return(0); |
| /* break; */ |
| } |
| |
| } |
| |
| static int acpt_read(BIO *b, char *out, int outl) |
| { |
| int ret=0; |
| BIO_ACCEPT *data; |
| |
| BIO_clear_retry_flags(b); |
| data=(BIO_ACCEPT *)b->ptr; |
| |
| while (b->next_bio == NULL) |
| { |
| ret=acpt_state(b,data); |
| if (ret <= 0) return(ret); |
| } |
| |
| ret=BIO_read(b->next_bio,out,outl); |
| BIO_copy_next_retry(b); |
| return(ret); |
| } |
| |
| static int acpt_write(BIO *b, const char *in, int inl) |
| { |
| int ret; |
| BIO_ACCEPT *data; |
| |
| BIO_clear_retry_flags(b); |
| data=(BIO_ACCEPT *)b->ptr; |
| |
| while (b->next_bio == NULL) |
| { |
| ret=acpt_state(b,data); |
| if (ret <= 0) return(ret); |
| } |
| |
| ret=BIO_write(b->next_bio,in,inl); |
| BIO_copy_next_retry(b); |
| return(ret); |
| } |
| |
| static long acpt_ctrl(BIO *b, int cmd, long num, void *ptr) |
| { |
| BIO *dbio; |
| int *ip; |
| long ret=1; |
| BIO_ACCEPT *data; |
| char **pp; |
| |
| data=(BIO_ACCEPT *)b->ptr; |
| |
| switch (cmd) |
| { |
| case BIO_CTRL_RESET: |
| ret=0; |
| data->state=ACPT_S_BEFORE; |
| acpt_close_socket(b); |
| b->flags=0; |
| break; |
| case BIO_C_DO_STATE_MACHINE: |
| /* use this one to start the connection */ |
| ret=(long)acpt_state(b,data); |
| break; |
| case BIO_C_SET_ACCEPT: |
| if (ptr != NULL) |
| { |
| if (num == 0) |
| { |
| b->init=1; |
| if (data->param_addr != NULL) |
| OPENSSL_free(data->param_addr); |
| data->param_addr=BUF_strdup(ptr); |
| } |
| else if (num == 1) |
| { |
| data->accept_nbio=(ptr != NULL); |
| } |
| else if (num == 2) |
| { |
| if (data->bio_chain != NULL) |
| BIO_free(data->bio_chain); |
| data->bio_chain=(BIO *)ptr; |
| } |
| } |
| break; |
| case BIO_C_SET_NBIO: |
| 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 |