160 lines
4.0 KiB
C
160 lines
4.0 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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#ifdef _WIN32
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#include <winsock2.h>
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#endif
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typedef struct socket_storage {
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krb5_socket_t sock;
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} socket_storage;
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#define SOCK(S) (((socket_storage*)(S)->data)->sock)
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static ssize_t
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socket_fetch(krb5_storage * sp, void *data, size_t size)
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{
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return net_read(SOCK(sp), data, size);
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}
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static ssize_t
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socket_store(krb5_storage * sp, const void *data, size_t size)
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{
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return net_write(SOCK(sp), data, size);
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}
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static off_t
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socket_seek(krb5_storage * sp, off_t offset, int whence)
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{
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return lseek(SOCK(sp), offset, whence);
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}
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static int
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socket_trunc(krb5_storage * sp, off_t offset)
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{
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if (ftruncate(SOCK(sp), offset) == -1)
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return errno;
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return 0;
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}
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static int
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socket_sync(krb5_storage * sp)
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{
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if (fsync(SOCK(sp)) == -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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socket_free(krb5_storage * sp)
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{
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int save_errno = errno;
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if (rk_IS_SOCKET_ERROR(rk_closesocket(SOCK(sp))))
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errno = rk_SOCK_ERRNO;
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else
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errno = save_errno;
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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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* @sa krb5_storage_from_fd()
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*/
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KRB5_LIB_FUNCTION krb5_storage * KRB5_LIB_CALL
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krb5_storage_from_socket(krb5_socket_t sock_in)
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{
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krb5_storage *sp;
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int saved_errno;
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krb5_socket_t sock;
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#ifdef _WIN32
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WSAPROTOCOL_INFO info;
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if (WSADuplicateSocket(sock_in, GetCurrentProcessId(), &info) == 0)
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{
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sock = WSASocket( FROM_PROTOCOL_INFO,
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FROM_PROTOCOL_INFO,
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FROM_PROTOCOL_INFO,
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&info, 0, 0);
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}
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#else
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sock = dup(sock_in);
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#endif
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if (sock == rk_INVALID_SOCKET)
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return NULL;
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errno = ENOMEM;
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sp = malloc(sizeof(krb5_storage));
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if (sp == NULL) {
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saved_errno = errno;
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rk_closesocket(sock);
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errno = saved_errno;
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return NULL;
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}
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errno = ENOMEM;
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sp->data = malloc(sizeof(socket_storage));
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if (sp->data == NULL) {
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saved_errno = errno;
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rk_closesocket(sock);
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free(sp);
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errno = saved_errno;
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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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SOCK(sp) = sock;
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sp->fetch = socket_fetch;
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sp->store = socket_store;
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sp->seek = socket_seek;
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sp->trunc = socket_trunc;
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sp->fsync = socket_sync;
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sp->free = socket_free;
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sp->max_alloc = UINT_MAX/8;
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return sp;
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}
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