minix/external/mit/xorg/lib/libxcb/files/xcb_util.c

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