/* ***** 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): * * 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 #include #include #include #include #ifdef __MINGW32__ #include #else #include #endif #include #include #include "guacio.h" char __GUACIO_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', '+', '/', }; GUACIO* guac_open(int fd) { GUACIO* io = malloc(sizeof(GUACIO)); io->ready = 0; io->written = 0; io->fd = fd; /* Allocate instruction buffer */ io->instructionbuf_size = 1024; io->instructionbuf = malloc(io->instructionbuf_size); io->instructionbuf_used_length = 0; return io; } void guac_close(GUACIO* io) { guac_flush(io); free(io->instructionbuf); free(io); } /* Write bytes, limit rate */ ssize_t __guac_write(GUACIO* io, const char* buf, int count) { int retval; #ifdef __MINGW32__ /* MINGW32 WINSOCK only works with send() */ retval = send(io->fd, buf, count, 0); #else /* Use write() for all other platforms */ retval = write(io->fd, buf, count); #endif return retval; } ssize_t guac_write_int(GUACIO* io, unsigned int i) { char buffer[128]; char* ptr = &(buffer[127]); *ptr = 0; do { ptr--; *ptr = '0' + (i % 10); i /= 10; } while (i > 0 && ptr >= buffer); return guac_write_string(io, ptr); } ssize_t guac_write_string(GUACIO* io, const char* str) { char* out_buf = io->out_buf; int retval; for (; *str != '\0'; str++) { out_buf[io->written++] = *str; /* Flush when necessary, return on error */ if (io->written > 8188 /* sizeof(out_buf) - 4 */) { retval = __guac_write(io, out_buf, io->written); if (retval < 0) return retval; io->written = 0; } } return 0; } ssize_t __guac_write_base64_triplet(GUACIO* io, int a, int b, int c) { char* out_buf = io->out_buf; int retval; /* Byte 1 */ out_buf[io->written++] = __GUACIO_BASE64_CHARACTERS[(a & 0xFC) >> 2]; /* [AAAAAA]AABBBB BBBBCC CCCCCC */ if (b >= 0) { out_buf[io->written++] = __GUACIO_BASE64_CHARACTERS[((a & 0x03) << 4) | ((b & 0xF0) >> 4)]; /* AAAAAA[AABBBB]BBBBCC CCCCCC */ if (c >= 0) { out_buf[io->written++] = __GUACIO_BASE64_CHARACTERS[((b & 0x0F) << 2) | ((c & 0xC0) >> 6)]; /* AAAAAA AABBBB[BBBBCC]CCCCCC */ out_buf[io->written++] = __GUACIO_BASE64_CHARACTERS[c & 0x3F]; /* AAAAAA AABBBB BBBBCC[CCCCCC] */ } else { out_buf[io->written++] = __GUACIO_BASE64_CHARACTERS[((b & 0x0F) << 2)]; /* AAAAAA AABBBB[BBBB--]------ */ out_buf[io->written++] = '='; /* AAAAAA AABBBB BBBB--[------] */ } } else { out_buf[io->written++] = __GUACIO_BASE64_CHARACTERS[((a & 0x03) << 4)]; /* AAAAAA[AA----]------ ------ */ out_buf[io->written++] = '='; /* AAAAAA AA----[------]------ */ out_buf[io->written++] = '='; /* AAAAAA AA---- ------[------] */ } /* At this point, 4 bytes have been io->written */ /* Flush when necessary, return on error */ if (io->written > 8188 /* sizeof(out_buf) - 4 */) { retval = __guac_write(io, out_buf, io->written); if (retval < 0) return retval; io->written = 0; } if (b < 0) return 1; if (c < 0) return 2; return 3; } ssize_t __guac_write_base64_byte(GUACIO* io, char buf) { int* ready_buf = io->ready_buf; int retval; ready_buf[io->ready++] = buf & 0xFF; /* Flush triplet */ if (io->ready == 3) { retval = __guac_write_base64_triplet(io, ready_buf[0], ready_buf[1], ready_buf[2]); if (retval < 0) return retval; io->ready = 0; } return 1; } ssize_t guac_write_base64(GUACIO* io, const void* buf, size_t count) { int retval; const char* char_buf = (const char*) buf; const char* end = char_buf + count; while (char_buf < end) { retval = __guac_write_base64_byte(io, *(char_buf++)); if (retval < 0) return retval; } return count; } ssize_t guac_flush(GUACIO* io) { int retval; /* Flush remaining bytes in buffer */ if (io->written > 0) { retval = __guac_write(io, io->out_buf, io->written); if (retval < 0) return retval; io->written = 0; } return 0; } ssize_t guac_flush_base64(GUACIO* io) { int retval; /* Flush triplet to output buffer */ while (io->ready > 0) { retval = __guac_write_base64_byte(io, -1); if (retval < 0) return retval; } return 0; } int guac_select(GUACIO* io, int usec_timeout) { fd_set fds; struct timeval timeout; if (usec_timeout < 0) return select(io->fd + 1, &fds, NULL, NULL, NULL); timeout.tv_sec = usec_timeout/1000000; timeout.tv_usec = usec_timeout%1000000; FD_ZERO(&fds); FD_SET(io->fd, &fds); return select(io->fd + 1, &fds, NULL, NULL, &timeout); }