133 lines
3.4 KiB
C
133 lines
3.4 KiB
C
/*
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* Copyright (c) 1997 - 2004 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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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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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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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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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE 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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#include "krb5_locl.h"
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#include "store-int.h"
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typedef struct fd_storage {
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int fd;
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} fd_storage;
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#define FD(S) (((fd_storage*)(S)->data)->fd)
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static ssize_t
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fd_fetch(krb5_storage * sp, void *data, size_t size)
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{
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return net_read(FD(sp), data, size);
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}
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static ssize_t
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fd_store(krb5_storage * sp, const void *data, size_t size)
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{
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return net_write(FD(sp), data, size);
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}
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static off_t
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fd_seek(krb5_storage * sp, off_t offset, int whence)
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{
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return lseek(FD(sp), offset, whence);
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}
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static int
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fd_trunc(krb5_storage * sp, off_t offset)
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{
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if (ftruncate(FD(sp), offset) == -1)
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return errno;
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return 0;
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}
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static void
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fd_free(krb5_storage * sp)
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{
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close(FD(sp));
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}
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/**
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*
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*
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* @return A krb5_storage on success, or NULL on out of memory error.
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*
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* @ingroup krb5_storage
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*
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* @sa krb5_storage_emem()
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* @sa krb5_storage_from_mem()
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* @sa krb5_storage_from_readonly_mem()
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* @sa krb5_storage_from_data()
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*/
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KRB5_LIB_FUNCTION krb5_storage * KRB5_LIB_CALL
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krb5_storage_from_fd(krb5_socket_t fd_in)
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{
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krb5_storage *sp;
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int fd;
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#ifdef SOCKET_IS_NOT_AN_FD
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#ifdef _MSC_VER
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if (_get_osfhandle(fd_in) != -1) {
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fd = dup(fd_in);
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} else {
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fd = _open_osfhandle(fd_in, 0);
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}
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#else
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#error Dont know how to deal with fd that may or may not be a socket.
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#endif
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#else /* SOCKET_IS_NOT_AN_FD */
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fd = dup(fd_in);
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#endif
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if (fd < 0)
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return NULL;
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sp = malloc(sizeof(krb5_storage));
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if (sp == NULL) {
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close(fd);
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return NULL;
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}
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sp->data = malloc(sizeof(fd_storage));
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if (sp->data == NULL) {
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close(fd);
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free(sp);
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return NULL;
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}
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sp->flags = 0;
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sp->eof_code = HEIM_ERR_EOF;
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FD(sp) = fd;
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sp->fetch = fd_fetch;
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sp->store = fd_store;
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sp->seek = fd_seek;
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sp->trunc = fd_trunc;
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sp->free = fd_free;
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return sp;
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}
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