485 lines
12 KiB
C
485 lines
12 KiB
C
/* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is 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 BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the names of the authors or their
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* institutions shall not be used in advertising or otherwise to promote the
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* sale, use or other dealings in this Software without prior written
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* authorization from the authors.
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*/
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/* Utility functions implementable using only public APIs. */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <assert.h>
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#include <sys/types.h>
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#include <limits.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <string.h>
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#ifdef _WIN32
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#include "xcb_windefs.h"
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#else
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#include <arpa/inet.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <fcntl.h>
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#include <netdb.h>
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#endif /* _WIN32 */
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#include "xcb.h"
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#include "xcbext.h"
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#include "xcbint.h"
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#if defined(HAVE_TSOL_LABEL_H) && defined(HAVE_IS_SYSTEM_LABELED)
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# include <tsol/label.h>
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# include <sys/stat.h>
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#endif
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int xcb_popcount(uint32_t mask)
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{
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uint32_t y;
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y = (mask >> 1) & 033333333333;
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y = mask - y - ((y >> 1) & 033333333333);
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return ((y + (y >> 3)) & 030707070707) % 077;
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}
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int xcb_sumof(uint8_t *list, int len)
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{
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int i, s = 0;
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for(i=0; i<len; i++) {
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s += *list;
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list++;
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}
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return s;
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}
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static int _xcb_parse_display(const char *name, char **host, char **protocol,
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int *displayp, int *screenp)
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{
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int len, display, screen;
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char *slash, *colon, *dot, *end;
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if(!name || !*name)
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name = getenv("DISPLAY");
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if(!name)
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return 0;
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#ifdef HAVE_LAUNCHD
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if(strncmp(name, "/tmp/launch", 11) == 0)
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slash = NULL;
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else
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#endif
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slash = strrchr(name, '/');
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if (slash) {
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len = slash - name;
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if (protocol) {
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*protocol = malloc(len + 1);
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if(!*protocol)
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return 0;
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memcpy(*protocol, name, len);
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(*protocol)[len] = '\0';
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}
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name = slash + 1;
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} else
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if (protocol)
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*protocol = NULL;
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colon = strrchr(name, ':');
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if(!colon)
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goto error_out;
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len = colon - name;
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++colon;
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display = strtoul(colon, &dot, 10);
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if(dot == colon)
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goto error_out;
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if(*dot == '\0')
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screen = 0;
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else
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{
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if(*dot != '.')
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goto error_out;
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++dot;
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screen = strtoul(dot, &end, 10);
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if(end == dot || *end != '\0')
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goto error_out;
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}
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/* At this point, the display string is fully parsed and valid, but
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* the caller's memory is untouched. */
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*host = malloc(len + 1);
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if(!*host)
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goto error_out;
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memcpy(*host, name, len);
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(*host)[len] = '\0';
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*displayp = display;
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if(screenp)
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*screenp = screen;
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return 1;
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error_out:
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if (protocol) {
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free(*protocol);
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*protocol = NULL;
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}
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return 0;
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}
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int xcb_parse_display(const char *name, char **host, int *displayp,
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int *screenp)
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{
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return _xcb_parse_display(name, host, NULL, displayp, screenp);
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}
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static int _xcb_open_tcp(const char *host, char *protocol, const unsigned short port);
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#ifndef _WIN32
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static int _xcb_open_unix(char *protocol, const char *file);
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#endif /* !WIN32 */
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#ifdef HAVE_ABSTRACT_SOCKETS
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static int _xcb_open_abstract(char *protocol, const char *file, size_t filelen);
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#endif
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static int _xcb_open(const char *host, char *protocol, const int display)
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{
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int fd;
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static const char unix_base[] = "/tmp/.X11-unix/X";
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const char *base = unix_base;
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size_t filelen;
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char *file = NULL;
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int actual_filelen;
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#ifdef HAVE_LAUNCHD
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if(strncmp(host, "/tmp/launch", 11) == 0) {
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base = host;
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host = "";
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protocol = "unix";
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}
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#endif
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/* If protocol or host is "unix", fall through to Unix socket code below */
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if ((!protocol || (strcmp("unix",protocol) != 0)) &&
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(*host != '\0') && (strcmp("unix",host) != 0))
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{
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/* display specifies TCP */
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unsigned short port = X_TCP_PORT + display;
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return _xcb_open_tcp(host, protocol, port);
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}
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#ifndef _WIN32
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#if defined(HAVE_TSOL_LABEL_H) && defined(HAVE_IS_SYSTEM_LABELED)
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/* Check special path for Unix sockets under Solaris Trusted Extensions */
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if (is_system_labeled())
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{
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struct stat sbuf;
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const char *tsol_base = "/var/tsol/doors/.X11-unix/X";
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char tsol_socket[PATH_MAX];
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snprintf(tsol_socket, sizeof(tsol_socket), "%s%d", tsol_base, display);
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if (stat(tsol_socket, &sbuf) == 0)
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base = tsol_base;
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}
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#endif
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filelen = strlen(base) + 1 + sizeof(display) * 3 + 1;
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file = malloc(filelen);
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if(file == NULL)
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return -1;
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/* display specifies Unix socket */
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#ifdef HAVE_LAUNCHD
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if(strncmp(base, "/tmp/launch", 11) == 0)
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actual_filelen = snprintf(file, filelen, "%s:%d", base, display);
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else
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#endif
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actual_filelen = snprintf(file, filelen, "%s%d", base, display);
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if(actual_filelen < 0)
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{
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free(file);
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return -1;
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}
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/* snprintf may truncate the file */
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filelen = MIN(actual_filelen, filelen - 1);
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#ifdef HAVE_ABSTRACT_SOCKETS
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fd = _xcb_open_abstract(protocol, file, filelen);
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if (fd >= 0 || (errno != ENOENT && errno != ECONNREFUSED))
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{
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free(file);
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return fd;
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}
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#endif
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fd = _xcb_open_unix(protocol, file);
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free(file);
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if (fd < 0 && !protocol && *host == '\0') {
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unsigned short port = X_TCP_PORT + display;
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fd = _xcb_open_tcp(host, protocol, port);
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}
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return fd;
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#endif /* !_WIN32 */
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return -1; /* if control reaches here then something has gone wrong */
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}
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static int _xcb_socket(int family, int type, int proto)
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{
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int fd;
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#ifdef SOCK_CLOEXEC
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fd = socket(family, type | SOCK_CLOEXEC, proto);
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if (fd == -1 && errno == EINVAL)
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#endif
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{
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fd = socket(family, type, proto);
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#ifndef _WIN32
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if (fd >= 0)
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fcntl(fd, F_SETFD, FD_CLOEXEC);
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#endif
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}
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return fd;
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}
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static int _xcb_do_connect(int fd, const struct sockaddr* addr, int addrlen) {
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int on = 1;
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if(fd < 0)
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return -1;
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setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on));
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setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on));
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return connect(fd, addr, addrlen);
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}
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static int _xcb_open_tcp(const char *host, char *protocol, const unsigned short port)
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{
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int fd = -1;
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#if HAVE_GETADDRINFO
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struct addrinfo hints;
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char service[6]; /* "65535" with the trailing '\0' */
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struct addrinfo *results, *addr;
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char *bracket;
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#endif
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if (protocol && strcmp("tcp",protocol) && strcmp("inet",protocol)
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#ifdef AF_INET6
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&& strcmp("inet6",protocol)
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#endif
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)
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return -1;
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if (*host == '\0')
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host = "localhost";
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#if HAVE_GETADDRINFO
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memset(&hints, 0, sizeof(hints));
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#ifdef AI_NUMERICSERV
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hints.ai_flags |= AI_NUMERICSERV;
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#endif
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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#ifdef AF_INET6
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/* Allow IPv6 addresses enclosed in brackets. */
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if(host[0] == '[' && (bracket = strrchr(host, ']')) && bracket[1] == '\0')
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{
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*bracket = '\0';
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++host;
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hints.ai_flags |= AI_NUMERICHOST;
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hints.ai_family = AF_INET6;
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}
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#endif
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snprintf(service, sizeof(service), "%hu", port);
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if(getaddrinfo(host, service, &hints, &results))
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/* FIXME: use gai_strerror, and fill in error connection */
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return -1;
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for(addr = results; addr; addr = addr->ai_next)
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{
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fd = _xcb_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
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if (_xcb_do_connect(fd, addr->ai_addr, addr->ai_addrlen) >= 0)
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break;
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close(fd);
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fd = -1;
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}
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freeaddrinfo(results);
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return fd;
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#else
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{
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struct hostent* _h;
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struct sockaddr_in _s;
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struct in_addr ** _c;
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if((_h = gethostbyname(host)) == NULL)
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return -1;
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_c = (struct in_addr**)_h->h_addr_list;
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fd = -1;
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while(*_c) {
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_s.sin_family = AF_INET;
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_s.sin_port = htons(port);
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_s.sin_addr = *(*_c);
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fd = _xcb_socket(_s.sin_family, SOCK_STREAM, 0);
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if(_xcb_do_connect(fd, (struct sockaddr*)&_s, sizeof(_s)) >= 0)
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break;
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close(fd);
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fd = -1;
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++_c;
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}
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return fd;
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}
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#endif
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}
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#ifndef _WIN32
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static int _xcb_open_unix(char *protocol, const char *file)
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{
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int fd;
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struct sockaddr_un addr;
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if (protocol && strcmp("unix",protocol))
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return -1;
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strcpy(addr.sun_path, file);
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addr.sun_family = AF_UNIX;
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#ifdef HAVE_SOCKADDR_SUN_LEN
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addr.sun_len = SUN_LEN(&addr);
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#endif
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fd = _xcb_socket(AF_UNIX, SOCK_STREAM, 0);
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if(fd == -1)
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return -1;
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if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1) {
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close(fd);
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return -1;
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}
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return fd;
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}
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#endif /* !_WIN32 */
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#ifdef HAVE_ABSTRACT_SOCKETS
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static int _xcb_open_abstract(char *protocol, const char *file, size_t filelen)
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{
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int fd;
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struct sockaddr_un addr = {0};
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socklen_t namelen;
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if (protocol && strcmp("unix",protocol))
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return -1;
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strcpy(addr.sun_path + 1, file);
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addr.sun_family = AF_UNIX;
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namelen = offsetof(struct sockaddr_un, sun_path) + 1 + filelen;
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#ifdef HAVE_SOCKADDR_SUN_LEN
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addr.sun_len = 1 + filelen;
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#endif
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fd = _xcb_socket(AF_UNIX, SOCK_STREAM, 0);
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if (fd == -1)
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return -1;
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if (connect(fd, (struct sockaddr *) &addr, namelen) == -1) {
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close(fd);
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return -1;
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}
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return fd;
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}
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#endif
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xcb_connection_t *xcb_connect(const char *displayname, int *screenp)
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{
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return xcb_connect_to_display_with_auth_info(displayname, NULL, screenp);
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}
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xcb_connection_t *xcb_connect_to_display_with_auth_info(const char *displayname, xcb_auth_info_t *auth, int *screenp)
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{
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int fd, display = 0;
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char *host = NULL;
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char *protocol = NULL;
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xcb_auth_info_t ourauth;
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xcb_connection_t *c;
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int parsed = _xcb_parse_display(displayname, &host, &protocol, &display, screenp);
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if(!parsed) {
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c = _xcb_conn_ret_error(XCB_CONN_CLOSED_PARSE_ERR);
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goto out;
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} else {
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#ifdef _WIN32
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WSADATA wsaData;
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if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
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c = _xcb_conn_ret_error(XCB_CONN_ERROR);
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goto out;
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}
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#endif
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fd = _xcb_open(host, protocol, display);
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}
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if(fd == -1) {
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c = _xcb_conn_ret_error(XCB_CONN_ERROR);
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#ifdef _WIN32
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WSACleanup();
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#endif
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goto out;
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}
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if(auth) {
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c = xcb_connect_to_fd(fd, auth);
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goto out;
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}
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if(_xcb_get_auth_info(fd, &ourauth, display))
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{
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c = xcb_connect_to_fd(fd, &ourauth);
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free(ourauth.name);
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free(ourauth.data);
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}
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else
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c = xcb_connect_to_fd(fd, 0);
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if(c->has_error)
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goto out;
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/* Make sure requested screen number is in bounds for this server */
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if((screenp != NULL) && (*screenp >= (int) c->setup->roots_len)) {
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xcb_disconnect(c);
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c = _xcb_conn_ret_error(XCB_CONN_CLOSED_INVALID_SCREEN);
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goto out;
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}
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out:
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free(host);
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free(protocol);
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return c;
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}
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