/libguac/libguac/src/socket.c
C | 320 lines | 179 code | 87 blank | 54 comment | 31 complexity | d4dc8b705b60937102dfab4746cd653a MD5 | raw file
Possible License(s): MPL-2.0-no-copyleft-exception, GPL-2.0
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is libguac.
- *
- * The Initial Developer of the Original Code is
- * Michael Jumper.
- * Portions created by the Initial Developer are Copyright (C) 2010
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- * David PHAM-VAN <d.pham-van@ulteo.com> Ulteo SAS - http://www.ulteo.com
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either the GNU General Public License Version 2 or later (the "GPL"), or
- * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #include <fcntl.h>
- #include <stdio.h>
- #include <stdint.h>
- #include <inttypes.h>
- #ifdef __MINGW32__
- #include <winsock2.h>
- #else
- #include <sys/select.h>
- #endif
- #include <time.h>
- #include <sys/time.h>
- #include "socket.h"
- #include "error.h"
- char __guac_socket_BASE64_CHARACTERS[64] = {
- 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
- 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
- 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
- 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/',
- };
- guac_socket* guac_socket_open(int fd) {
- guac_socket* socket = malloc(sizeof(guac_socket));
- /* If no memory available, return with error */
- if (socket == NULL) {
- guac_error = GUAC_STATUS_NO_MEMORY;
- guac_error_message = "Could not allocate memory for socket";
- return NULL;
- }
- socket->__ready = 0;
- socket->__written = 0;
- socket->fd = fd;
- /* Allocate instruction buffer */
- socket->__instructionbuf_size = 1024;
- socket->__instructionbuf = malloc(socket->__instructionbuf_size);
- /* If no memory available, return with error */
- if (socket->__instructionbuf == NULL) {
- guac_error = GUAC_STATUS_NO_MEMORY;
- guac_error_message = "Could not allocate memory for instruction buffer";
- free(socket);
- return NULL;
- }
- /* Init members */
- socket->__instructionbuf_used_length = 0;
- socket->__instructionbuf_parse_start = 0;
- socket->__instructionbuf_elementc = 0;
- return socket;
- }
- void guac_socket_close(guac_socket* socket) {
- guac_socket_flush(socket);
- free(socket->__instructionbuf);
- free(socket);
- }
- /* Write bytes, limit rate */
- ssize_t __guac_socket_write(guac_socket* socket, const char* buf, int count) {
- int retval;
- #ifdef __MINGW32__
- /* MINGW32 WINSOCK only works with send() */
- retval = send(socket->fd, buf, count, 0);
- #else
- /* Use write() for all other platforms */
- retval = write(socket->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;
- }
- ssize_t guac_socket_write_int(guac_socket* socket, int64_t i) {
- char buffer[128];
- snprintf(buffer, sizeof(buffer), "%"PRIi64, i);
- return guac_socket_write_string(socket, buffer);
- }
- ssize_t guac_socket_write_string(guac_socket* socket, const char* str) {
- char* __out_buf = socket->__out_buf;
- int retval;
- for (; *str != '\0'; str++) {
- __out_buf[socket->__written++] = *str;
- /* Flush when necessary, return on error */
- if (socket->__written > 8188 /* sizeof(__out_buf) - 4 */) {
- retval = __guac_socket_write(socket, __out_buf, socket->__written);
- if (retval < 0)
- return retval;
- socket->__written = 0;
- }
- }
- return 0;
- }
- ssize_t __guac_socket_write_base64_triplet(guac_socket* socket, int a, int b, int c) {
- char* __out_buf = socket->__out_buf;
- int retval;
- /* Byte 1 */
- __out_buf[socket->__written++] = __guac_socket_BASE64_CHARACTERS[(a & 0xFC) >> 2]; /* [AAAAAA]AABBBB BBBBCC CCCCCC */
- if (b >= 0) {
- __out_buf[socket->__written++] = __guac_socket_BASE64_CHARACTERS[((a & 0x03) << 4) | ((b & 0xF0) >> 4)]; /* AAAAAA[AABBBB]BBBBCC CCCCCC */
- if (c >= 0) {
- __out_buf[socket->__written++] = __guac_socket_BASE64_CHARACTERS[((b & 0x0F) << 2) | ((c & 0xC0) >> 6)]; /* AAAAAA AABBBB[BBBBCC]CCCCCC */
- __out_buf[socket->__written++] = __guac_socket_BASE64_CHARACTERS[c & 0x3F]; /* AAAAAA AABBBB BBBBCC[CCCCCC] */
- }
- else {
- __out_buf[socket->__written++] = __guac_socket_BASE64_CHARACTERS[((b & 0x0F) << 2)]; /* AAAAAA AABBBB[BBBB--]------ */
- __out_buf[socket->__written++] = '='; /* AAAAAA AABBBB BBBB--[------] */
- }
- }
- else {
- __out_buf[socket->__written++] = __guac_socket_BASE64_CHARACTERS[((a & 0x03) << 4)]; /* AAAAAA[AA----]------ ------ */
- __out_buf[socket->__written++] = '='; /* AAAAAA AA----[------]------ */
- __out_buf[socket->__written++] = '='; /* AAAAAA AA---- ------[------] */
- }
- /* At this point, 4 bytes have been socket->__written */
- /* Flush when necessary, return on error */
- if (socket->__written > 8188 /* sizeof(__out_buf) - 4 */) {
- retval = __guac_socket_write(socket, __out_buf, socket->__written);
- if (retval < 0)
- return retval;
- socket->__written = 0;
- }
- if (b < 0)
- return 1;
- if (c < 0)
- return 2;
- return 3;
- }
- ssize_t __guac_socket_write_base64_byte(guac_socket* socket, int buf) {
- int* __ready_buf = socket->__ready_buf;
- int retval;
- __ready_buf[socket->__ready++] = buf;
- /* Flush triplet */
- if (socket->__ready == 3) {
- retval = __guac_socket_write_base64_triplet(socket, __ready_buf[0], __ready_buf[1], __ready_buf[2]);
- if (retval < 0)
- return retval;
- socket->__ready = 0;
- }
- return 1;
- }
- ssize_t guac_socket_write_base64(guac_socket* socket, const void* buf, size_t count) {
- int retval;
- const unsigned char* char_buf = (const unsigned char*) buf;
- const unsigned char* end = char_buf + count;
- while (char_buf < end) {
- retval = __guac_socket_write_base64_byte(socket, *(char_buf++));
- if (retval < 0)
- return retval;
- }
- return 0;
- }
- ssize_t guac_socket_flush(guac_socket* socket) {
- int retval;
- /* Flush remaining bytes in buffer */
- if (socket->__written > 0) {
- retval = __guac_socket_write(socket, socket->__out_buf, socket->__written);
- if (retval < 0)
- return retval;
- socket->__written = 0;
- }
- return 0;
- }
- ssize_t guac_socket_flush_base64(guac_socket* socket) {
- int retval;
- /* Flush triplet to output buffer */
- while (socket->__ready > 0) {
- retval = __guac_socket_write_base64_byte(socket, -1);
- if (retval < 0)
- return retval;
- }
- return 0;
- }
- int guac_socket_select(guac_socket* socket, int usec_timeout) {
- fd_set fds;
- struct timeval timeout;
- int retval;
- /* No timeout if usec_timeout is negative */
- if (usec_timeout < 0)
- retval = select(socket->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(socket->fd, &fds);
- retval = select(socket->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_INPUT_TIMEOUT;
- guac_error_message = "Timeout while waiting for data on socket";
- }
- return retval;
- }