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/*
* Copyright (c) 1997 - 2004 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* 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 above 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. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE 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.
*/
#include "krb5_locl.h"
#include "store-int.h"
typedef struct fd_storage {
int fd;
} fd_storage;
#define FD(S) (((fd_storage*)(S)->data)->fd)
static ssize_t
fd_fetch(krb5_storage * sp, void *data, size_t size)
{
return net_read(FD(sp), data, size);
}
static ssize_t
fd_store(krb5_storage * sp, const void *data, size_t size)
{
return net_write(FD(sp), data, size);
}
static off_t
fd_seek(krb5_storage * sp, off_t offset, int whence)
{
return lseek(FD(sp), offset, whence);
}
static int
fd_trunc(krb5_storage * sp, off_t offset)
{
if (ftruncate(FD(sp), offset) == -1)
return errno;
return 0;
}
static void
fd_free(krb5_storage * sp)
{
close(FD(sp));
}
/**
*
*
* @return A krb5_storage on success, or NULL on out of memory error.
*
* @ingroup krb5_storage
*
* @sa krb5_storage_emem()
* @sa krb5_storage_from_mem()
* @sa krb5_storage_from_readonly_mem()
* @sa krb5_storage_from_data()
*/
KRB5_LIB_FUNCTION krb5_storage * KRB5_LIB_CALL
krb5_storage_from_fd(krb5_socket_t fd_in)
{
krb5_storage *sp;
int fd;
#ifdef SOCKET_IS_NOT_AN_FD
#ifdef _MSC_VER
if (_get_osfhandle(fd_in) != -1) {
fd = dup(fd_in);
} else {
fd = _open_osfhandle(fd_in, 0);
}
#else
#error Dont know how to deal with fd that may or may not be a socket.
#endif
#else /* SOCKET_IS_NOT_AN_FD */
fd = dup(fd_in);
#endif
if (fd < 0)
return NULL;
sp = malloc(sizeof(krb5_storage));
if (sp == NULL) {
close(fd);
return NULL;
}
sp->data = malloc(sizeof(fd_storage));
if (sp->data == NULL) {
close(fd);
free(sp);
return NULL;
}
sp->flags = 0;
sp->eof_code = HEIM_ERR_EOF;
FD(sp) = fd;
sp->fetch = fd_fetch;
sp->store = fd_store;
sp->seek = fd_seek;
sp->trunc = fd_trunc;
sp->free = fd_free;
sp->max_alloc = UINT_MAX/8;
return sp;
}
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