2016-05-18 02:52:22 +08:00
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/*
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* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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1998-12-21 18:52:47 +08:00
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*
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2016-05-18 02:52:22 +08:00
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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1998-12-21 18:52:47 +08:00
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*/
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2001-02-02 08:31:45 +08:00
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#include <stdio.h>
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#include <errno.h>
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2016-02-02 23:23:26 +08:00
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#include "bio_lcl.h"
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2005-11-03 23:50:50 +08:00
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#if defined(OPENSSL_NO_POSIX_IO)
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/*
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2013-01-20 04:23:13 +08:00
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* Dummy placeholder for BIO_s_fd...
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2005-11-03 23:50:50 +08:00
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*/
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2015-01-22 11:40:55 +08:00
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BIO *BIO_new_fd(int fd, int close_flag)
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{
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return NULL;
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}
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2013-01-20 04:23:13 +08:00
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int BIO_fd_non_fatal_error(int err)
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2015-01-22 11:40:55 +08:00
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{
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return 0;
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}
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2013-01-20 04:23:13 +08:00
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int BIO_fd_should_retry(int i)
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2015-01-22 11:40:55 +08:00
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{
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return 0;
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}
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2013-01-20 04:23:13 +08:00
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2016-03-20 00:32:14 +08:00
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const BIO_METHOD *BIO_s_fd(void)
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2015-01-22 11:40:55 +08:00
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{
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return NULL;
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}
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2005-11-03 23:50:50 +08:00
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#else
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2005-05-17 08:08:28 +08:00
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/*
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* As for unconditional usage of "UPLINK" interface in this module.
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* Trouble is that unlike Unix file descriptors [which are indexes
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* in kernel-side per-process table], corresponding descriptors on
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* platforms which require "UPLINK" interface seem to be indexes
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* in a user-land, non-global table. Well, in fact they are indexes
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* in stdio _iob[], and recall that _iob[] was the very reason why
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* "UPLINK" interface was introduced in first place. But one way on
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* another. Neither libcrypto or libssl use this BIO meaning that
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* file descriptors can only be provided by application. Therefore
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* "UPLINK" calls are due...
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*/
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2001-02-02 08:31:45 +08:00
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static int fd_write(BIO *h, const char *buf, int num);
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static int fd_read(BIO *h, char *buf, int size);
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static int fd_puts(BIO *h, const char *str);
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2006-02-13 07:11:56 +08:00
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static int fd_gets(BIO *h, char *buf, int size);
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2001-02-02 08:31:45 +08:00
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static long fd_ctrl(BIO *h, int cmd, long arg1, void *arg2);
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static int fd_new(BIO *h);
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static int fd_free(BIO *data);
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int BIO_fd_should_retry(int s);
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2016-03-20 00:32:14 +08:00
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static const BIO_METHOD methods_fdp = {
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2015-01-22 11:40:55 +08:00
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BIO_TYPE_FD, "file descriptor",
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2016-10-20 22:18:39 +08:00
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/* TODO: Convert to new style write function */
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bwrite_conv,
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2015-01-22 11:40:55 +08:00
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fd_write,
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2016-09-06 00:26:58 +08:00
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/* TODO: Convert to new style read function */
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bread_conv,
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2015-01-22 11:40:55 +08:00
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fd_read,
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fd_puts,
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fd_gets,
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fd_ctrl,
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fd_new,
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fd_free,
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NULL,
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};
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2001-02-02 08:31:45 +08:00
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2016-03-20 00:32:14 +08:00
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const BIO_METHOD *BIO_s_fd(void)
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2015-01-22 11:40:55 +08:00
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{
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return (&methods_fdp);
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}
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BIO *BIO_new_fd(int fd, int close_flag)
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{
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BIO *ret;
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ret = BIO_new(BIO_s_fd());
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if (ret == NULL)
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return (NULL);
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BIO_set_fd(ret, fd, close_flag);
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return (ret);
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}
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2001-02-02 08:31:45 +08:00
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static int fd_new(BIO *bi)
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2015-01-22 11:40:55 +08:00
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{
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bi->init = 0;
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bi->num = -1;
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bi->ptr = NULL;
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bi->flags = BIO_FLAGS_UPLINK; /* essentially redundant */
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return (1);
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}
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2001-02-02 08:31:45 +08:00
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static int fd_free(BIO *a)
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2015-01-22 11:40:55 +08:00
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{
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if (a == NULL)
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return (0);
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if (a->shutdown) {
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if (a->init) {
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UP_close(a->num);
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}
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a->init = 0;
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a->flags = BIO_FLAGS_UPLINK;
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}
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return (1);
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}
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static int fd_read(BIO *b, char *out, int outl)
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{
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int ret = 0;
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if (out != NULL) {
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clear_sys_error();
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ret = UP_read(b->num, out, outl);
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BIO_clear_retry_flags(b);
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if (ret <= 0) {
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if (BIO_fd_should_retry(ret))
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BIO_set_retry_read(b);
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}
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}
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return (ret);
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}
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2001-02-02 08:31:45 +08:00
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static int fd_write(BIO *b, const char *in, int inl)
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2015-01-22 11:40:55 +08:00
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{
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int ret;
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clear_sys_error();
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ret = UP_write(b->num, in, inl);
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BIO_clear_retry_flags(b);
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if (ret <= 0) {
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if (BIO_fd_should_retry(ret))
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BIO_set_retry_write(b);
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}
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return (ret);
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}
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2001-02-02 08:31:45 +08:00
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static long fd_ctrl(BIO *b, int cmd, long num, void *ptr)
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2015-01-22 11:40:55 +08:00
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{
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long ret = 1;
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int *ip;
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switch (cmd) {
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case BIO_CTRL_RESET:
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num = 0;
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2017-05-11 22:21:37 +08:00
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/* fall thru */
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2015-01-22 11:40:55 +08:00
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case BIO_C_FILE_SEEK:
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ret = (long)UP_lseek(b->num, num, 0);
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break;
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case BIO_C_FILE_TELL:
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case BIO_CTRL_INFO:
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ret = (long)UP_lseek(b->num, 0, 1);
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break;
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case BIO_C_SET_FD:
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fd_free(b);
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b->num = *((int *)ptr);
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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 = b->num;
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ret = b->num;
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} else
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ret = -1;
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break;
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case BIO_CTRL_GET_CLOSE:
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ret = b->shutdown;
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break;
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case BIO_CTRL_SET_CLOSE:
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b->shutdown = (int)num;
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break;
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case BIO_CTRL_PENDING:
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case BIO_CTRL_WPENDING:
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ret = 0;
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break;
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case BIO_CTRL_DUP:
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case BIO_CTRL_FLUSH:
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ret = 1;
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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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2001-02-02 08:31:45 +08:00
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static int fd_puts(BIO *bp, const char *str)
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2015-01-22 11:40:55 +08:00
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{
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int n, ret;
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2001-02-02 08:31:45 +08:00
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2015-01-22 11:40:55 +08:00
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n = strlen(str);
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ret = fd_write(bp, str, n);
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return (ret);
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}
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2001-02-02 08:31:45 +08:00
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2006-02-13 07:11:56 +08:00
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static int fd_gets(BIO *bp, char *buf, int size)
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2015-01-22 11:40:55 +08:00
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{
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int ret = 0;
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char *ptr = buf;
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char *end = buf + size - 1;
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2006-02-13 07:11:56 +08:00
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2015-01-22 11:40:55 +08:00
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while ((ptr < end) && (fd_read(bp, ptr, 1) > 0) && (ptr[0] != '\n'))
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ptr++;
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2006-02-13 07:11:56 +08:00
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2015-01-22 11:40:55 +08:00
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ptr[0] = '\0';
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2006-02-13 07:11:56 +08:00
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2015-01-22 11:40:55 +08:00
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if (buf[0] != '\0')
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ret = strlen(buf);
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return (ret);
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}
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2006-02-13 07:11:56 +08:00
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2001-02-02 08:31:45 +08:00
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int BIO_fd_should_retry(int i)
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2015-01-22 11:40:55 +08:00
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{
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int err;
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2001-02-02 08:31:45 +08:00
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2015-01-22 11:40:55 +08:00
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if ((i == 0) || (i == -1)) {
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err = get_last_sys_error();
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2001-02-02 08:31:45 +08:00
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2015-01-22 11:40:55 +08:00
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return (BIO_fd_non_fatal_error(err));
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}
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return (0);
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}
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2001-02-02 08:31:45 +08:00
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int BIO_fd_non_fatal_error(int err)
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2015-01-22 11:40:55 +08:00
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{
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switch (err) {
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# ifdef EWOULDBLOCK
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# ifdef WSAEWOULDBLOCK
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# if WSAEWOULDBLOCK != EWOULDBLOCK
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case EWOULDBLOCK:
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# endif
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# else
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case EWOULDBLOCK:
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2001-02-02 08:31:45 +08:00
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# endif
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# endif
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2015-01-22 11:40:55 +08:00
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# if defined(ENOTCONN)
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case ENOTCONN:
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# endif
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2001-02-02 08:31:45 +08:00
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2015-01-22 11:40:55 +08:00
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# ifdef EINTR
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case EINTR:
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# endif
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2001-02-02 08:31:45 +08:00
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2015-01-22 11:40:55 +08:00
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# ifdef EAGAIN
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# if EWOULDBLOCK != EAGAIN
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case EAGAIN:
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# endif
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2001-02-02 08:31:45 +08:00
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# endif
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2015-01-22 11:40:55 +08:00
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# ifdef EPROTO
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case EPROTO:
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# endif
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2001-02-02 08:31:45 +08:00
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2015-01-22 11:40:55 +08:00
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# ifdef EINPROGRESS
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case EINPROGRESS:
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# endif
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2001-02-02 08:31:45 +08:00
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2015-01-22 11:40:55 +08:00
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# ifdef EALREADY
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case EALREADY:
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# endif
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return (1);
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default:
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break;
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}
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return (0);
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}
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2005-11-03 23:31:28 +08:00
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#endif
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