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