guacamole-spice-protocol/src/libguac/socket-fd.c

144 lines
3.9 KiB
C

/*
* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "error.h"
#include "socket.h"
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <unistd.h>
#ifdef __MINGW32__
#include <winsock2.h>
#else
#include <sys/select.h>
#endif
typedef struct __guac_socket_fd_data {
int fd;
} __guac_socket_fd_data;
ssize_t __guac_socket_fd_read_handler(guac_socket* socket,
void* buf, size_t count) {
__guac_socket_fd_data* data = (__guac_socket_fd_data*) socket->data;
/* Read from socket */
int retval = read(data->fd, buf, count);
/* Record errors in guac_error */
if (retval < 0) {
guac_error = GUAC_STATUS_SEE_ERRNO;
guac_error_message = "Error reading data from socket";
}
return retval;
}
ssize_t __guac_socket_fd_write_handler(guac_socket* socket,
const void* buf, size_t count) {
__guac_socket_fd_data* data = (__guac_socket_fd_data*) socket->data;
int retval;
#ifdef __MINGW32__
/* MINGW32 WINSOCK only works with send() */
retval = send(data->fd, buf, count, 0);
#else
/* Use write() for all other platforms */
retval = write(data->fd, buf, count);
#endif
/* Record errors in guac_error */
if (retval < 0) {
guac_error = GUAC_STATUS_SEE_ERRNO;
guac_error_message = "Error writing data to socket";
}
return retval;
}
int __guac_socket_fd_select_handler(guac_socket* socket, int usec_timeout) {
__guac_socket_fd_data* data = (__guac_socket_fd_data*) socket->data;
fd_set fds;
struct timeval timeout;
int retval;
/* No timeout if usec_timeout is negative */
if (usec_timeout < 0)
retval = select(data->fd + 1, &fds, NULL, NULL, NULL);
/* Handle timeout if specified */
else {
timeout.tv_sec = usec_timeout/1000000;
timeout.tv_usec = usec_timeout%1000000;
FD_ZERO(&fds);
FD_SET(data->fd, &fds);
retval = select(data->fd + 1, &fds, NULL, NULL, &timeout);
}
/* Properly set guac_error */
if (retval < 0) {
guac_error = GUAC_STATUS_SEE_ERRNO;
guac_error_message = "Error while waiting for data on socket";
}
if (retval == 0) {
guac_error = GUAC_STATUS_TIMEOUT;
guac_error_message = "Timeout while waiting for data on socket";
}
return retval;
}
guac_socket* guac_socket_open(int fd) {
/* Allocate socket and associated data */
guac_socket* socket = guac_socket_alloc();
__guac_socket_fd_data* data = malloc(sizeof(__guac_socket_fd_data));
/* Store file descriptor as socket data */
data->fd = fd;
socket->data = data;
/* Set read/write handlers */
socket->read_handler = __guac_socket_fd_read_handler;
socket->write_handler = __guac_socket_fd_write_handler;
socket->select_handler = __guac_socket_fd_select_handler;
return socket;
}