libetpan - fdik
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/*
* libEtPan! -- a mail stuff library
*
* Copyright (C) 2001, 2005 - DINH Viet Hoa
* 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 libEtPan! project 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 AUTHORS 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 AUTHORS 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.
*/
/*
* $Id: mailstream_socket.c,v 1.33 2011/04/15 10:43:31 hoa Exp $
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "mailstream_socket.h"
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <stdlib.h>
#include <fcntl.h>
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
/*
these 3 headers MUST be included before <sys/select.h>
to insure compatibility with Mac OS X (this is true for 10.2)
*/
#ifdef WIN32
# include <win_etpan.h>
#else
# include <sys/time.h>
# include <sys/types.h>
# ifdef HAVE_SYS_SELECT_H
# include <sys/select.h>
# endif
#endif
#include "mailstream_cancel.h"
struct mailstream_socket_data {
int fd;
struct mailstream_cancel * cancel;
int use_read;
};
/* mailstream_low, socket */
static int mailstream_low_socket_close(mailstream_low * s);
static ssize_t mailstream_low_socket_read(mailstream_low * s,
void * buf, size_t count);
static ssize_t mailstream_low_socket_write(mailstream_low * s,
const void * buf, size_t count);
static void mailstream_low_socket_free(mailstream_low * s);
static int mailstream_low_socket_get_fd(mailstream_low * s);
static void mailstream_low_socket_cancel(mailstream_low * s);
static struct mailstream_cancel * mailstream_low_socket_get_cancel(mailstream_low * s);
static mailstream_low_driver local_mailstream_socket_driver = {
/* mailstream_read */ mailstream_low_socket_read,
/* mailstream_write */ mailstream_low_socket_write,
/* mailstream_close */ mailstream_low_socket_close,
/* mailstream_get_fd */ mailstream_low_socket_get_fd,
/* mailstream_free */ mailstream_low_socket_free,
/* mailstream_cancel */ mailstream_low_socket_cancel,
/* mailstream_get_cancel */ mailstream_low_socket_get_cancel,
/* mailstream_get_certificate_chain */ NULL,
};
mailstream_low_driver * mailstream_socket_driver =
&local_mailstream_socket_driver;
/* file descriptor must be given in (default) blocking-mode */
static struct mailstream_socket_data * socket_data_new(int fd)
{
struct mailstream_socket_data * socket_data;
socket_data = (struct mailstream_socket_data * ) malloc(sizeof(* socket_data));
if (socket_data == NULL)
goto err;
socket_data->fd = fd;
socket_data->use_read = 0;
socket_data->cancel = mailstream_cancel_new();
if (socket_data->cancel == NULL)
goto free;
return socket_data;
free:
free(socket_data);
err:
return NULL;
}
static void socket_data_free(struct mailstream_socket_data * socket_data)
{
mailstream_cancel_free(socket_data->cancel);
free(socket_data);
}
static void socket_data_close(struct mailstream_socket_data * socket_data)
{
#ifdef WIN32
/* SEB */
closesocket(socket_data->fd);
#else
close(socket_data->fd);
#endif
socket_data->fd = -1;
}
mailstream_low * mailstream_low_socket_open(int fd)
{
mailstream_low * s;
struct mailstream_socket_data * socket_data;
socket_data = socket_data_new(fd);
if (socket_data == NULL)
goto err;
s = mailstream_low_new(socket_data, mailstream_socket_driver);
if (s == NULL)
goto free_socket_data;
return s;
free_socket_data:
socket_data_free(socket_data);
err:
return NULL;
}
static int mailstream_low_socket_close(mailstream_low * s)
{
struct mailstream_socket_data * socket_data;
socket_data = (struct mailstream_socket_data *) s->data;
socket_data_close(socket_data);
return 0;
}
static void mailstream_low_socket_free(mailstream_low * s)
{
struct mailstream_socket_data * socket_data;
socket_data = (struct mailstream_socket_data *) s->data;
socket_data_free(socket_data);
s->data = NULL;
free(s);
}
static int mailstream_low_socket_get_fd(mailstream_low * s)
{
struct mailstream_socket_data * socket_data;
socket_data = (struct mailstream_socket_data *) s->data;
return socket_data->fd;
}
static ssize_t mailstream_low_socket_read(mailstream_low * s,
void * buf, size_t count)
{
struct mailstream_socket_data * socket_data;
socket_data = (struct mailstream_socket_data *) s->data;
if (mailstream_cancel_cancelled(socket_data->cancel))
return -1;
/* timeout */
{
fd_set fds_read;
struct timeval timeout;
int r;
int fd;
int cancelled;
int got_data;
#ifdef WIN32
HANDLE event;
#else
int max_fd;
#endif
if (s->timeout == 0) {
timeout = mailstream_network_delay;
}
else {
timeout.tv_sec = s->timeout;
timeout.tv_usec = 0;
}
FD_ZERO(&fds_read);
fd = mailstream_cancel_get_fd(socket_data->cancel);
FD_SET(fd, &fds_read);
#ifdef WIN32
event = CreateEvent(NULL, TRUE, FALSE, NULL);
WSAEventSelect(socket_data->fd, event, FD_READ | FD_CLOSE);
FD_SET(event, &fds_read);
r = WaitForMultipleObjects(fds_read.fd_count, fds_read.fd_array, FALSE, timeout.tv_sec * 1000 + timeout.tv_usec / 1000);
if (WAIT_TIMEOUT == r) {
WSAEventSelect(socket_data->fd, event, 0);
CloseHandle(event);
return -1;
}
cancelled = (fds_read.fd_array[r - WAIT_OBJECT_0] == fd);
got_data = (fds_read.fd_array[r - WAIT_OBJECT_0] == event);
WSAEventSelect(socket_data->fd, event, 0);
CloseHandle(event);
#else
FD_SET(socket_data->fd, &fds_read);
max_fd = socket_data->fd;
if (fd > max_fd)
max_fd = fd;
r = select(max_fd + 1, &fds_read, NULL,/* &fds_excp*/ NULL, &timeout);
if (r <= 0)
return -1;
cancelled = FD_ISSET(fd, &fds_read);
got_data = FD_ISSET(socket_data->fd, &fds_read);
#endif
if (cancelled) {
/* cancelled */
mailstream_cancel_ack(socket_data->cancel);
return -1;
}
if (!got_data)
return 0;
}
if (socket_data->use_read) {
return read(socket_data->fd, buf, count);
}
else {
return recv(socket_data->fd, buf, count, 0);
}
}
static ssize_t mailstream_low_socket_write(mailstream_low * s,
const void * buf, size_t count)
{
struct mailstream_socket_data * socket_data;
socket_data = (struct mailstream_socket_data *) s->data;
if (mailstream_cancel_cancelled(socket_data->cancel))
return -1;
/* timeout */
{
fd_set fds_read;
fd_set fds_write;
struct timeval timeout;
int r;
int fd;
int max_fd;
int cancelled;
int write_enabled;
#ifdef WIN32
HANDLE event;
#endif
if (s->timeout == 0) {
timeout = mailstream_network_delay;
}
else {
timeout.tv_sec = s->timeout;
timeout.tv_usec = 0;
}
FD_ZERO(&fds_read);
fd = mailstream_cancel_get_fd(socket_data->cancel);
FD_SET(fd, &fds_read);
FD_ZERO(&fds_write);
#ifdef WIN32
event = CreateEvent(NULL, TRUE, FALSE, NULL);
WSAEventSelect(socket_data->fd, event, FD_WRITE | FD_CLOSE);
FD_SET(event, &fds_read);
r = WaitForMultipleObjects(fds_read.fd_count, fds_read.fd_array, FALSE, timeout.tv_sec * 1000 + timeout.tv_usec / 1000);
if (r < 0) {
WSAEventSelect(socket_data->fd, event, 0);
CloseHandle(event);
return -1;
}
cancelled = (fds_read.fd_array[r - WAIT_OBJECT_0] == fd);
write_enabled = (fds_read.fd_array[r - WAIT_OBJECT_0] == event);
WSAEventSelect(socket_data->fd, event, 0);
CloseHandle(event);
#else
FD_SET(socket_data->fd, &fds_write);
max_fd = socket_data->fd;
if (fd > max_fd)
max_fd = fd;
r = select(max_fd + 1, &fds_read, &fds_write, /*&fds_excp */ NULL, &timeout);
if (r <= 0)
return -1;
cancelled = FD_ISSET(fd, &fds_read);
write_enabled = FD_ISSET(socket_data->fd, &fds_write);
#endif
if (cancelled) {
/* cancelled */
mailstream_cancel_ack(socket_data->cancel);
return -1;
}
if (!write_enabled)
return 0;
}
return send(socket_data->fd, buf, count, 0);
}
/* mailstream */
mailstream * mailstream_socket_open(int fd)
{
return mailstream_socket_open_timeout(fd, 0);
}
mailstream * mailstream_socket_open_timeout(int fd, time_t timeout)
{
mailstream_low * low;
mailstream * s;
low = mailstream_low_socket_open(fd);
if (low == NULL)
goto err;
mailstream_low_set_timeout(low, timeout);
s = mailstream_new(low, 8192);
if (s == NULL)
goto free_low;
return s;
free_low:
mailstream_low_close(low);
err:
return NULL;
}
static void mailstream_low_socket_cancel(mailstream_low * s)
{
struct mailstream_socket_data * socket_data;
socket_data = (struct mailstream_socket_data *) s->data;
mailstream_cancel_notify(socket_data->cancel);
}
void mailstream_socket_set_use_read(mailstream * stream, int use_read)
{
struct mailstream_socket_data * socket_data;
mailstream_low * low;
low = mailstream_get_low(stream);
socket_data = (struct mailstream_socket_data *) low->data;
socket_data->use_read = use_read;
}
static struct mailstream_cancel * mailstream_low_socket_get_cancel(mailstream_low * s)
{
struct mailstream_socket_data * socket_data;
socket_data = (struct mailstream_socket_data *) s->data;
return socket_data->cancel;
}