xserver libX11 libxcb mesa git update 6 Apr 2011

1 files changed, 421 insertions, 480 deletions

diff --git a/libxcb/src/xcb_util.c b/libxcb/src/xcb_util.c
index d8a36f170..0128f6485 100644
--- a/libxcb/src/xcb_util.c
+++ b/libxcb/src/xcb_util.c
@@ -1,480 +1,421 @@
-/* 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. */
-
-#include <assert.h>
-#include <sys/types.h>
-#include <limits.h>
-#ifdef DNETCONN
-#include <netdnet/dnetdb.h>
-#include <netdnet/dn.h>
-#endif
-#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 <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"
-
-/* must be after "xcbint.h" to get autoconf #defines */
-#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 DNETCONN
-static int _xcb_open_decnet(const char *host, char *protocol, const unsigned short port);
-#endif
-#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 = NULL;
-        }
-#endif
-
-    if(*host || protocol)
-    {
-#ifdef DNETCONN
-        /* DECnet displays have two colons, so _xcb_parse_display will have
-           left one at the end.  However, an IPv6 address can end with *two*
-           colons, so only treat this as a DECnet display if host ends with
-           exactly one colon. */
-        char *colon = strchr(host, ':');
-        if(colon && *(colon+1) == '\0')
-        {
-            *colon = '\0';
-            return _xcb_open_decnet(host, protocol, display);
-        }
-        else
-#endif
-            if (protocol
-                || strcmp("unix",host)) { /* follow the old unix: rule */
-
-                /* 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);
-
-    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;
-}
-
-#ifdef DNETCONN
-static int _xcb_open_decnet(const char *host, const char *protocol, const unsigned short port)
-{
-    int fd;
-    struct sockaddr_dn addr;
-    struct accessdata_dn accessdata;
-    struct nodeent *nodeaddr = getnodebyname(host);
-
-    if(!nodeaddr)
-        return -1;
-    if (protocol && strcmp("dnet",protocol))
-        return -1;
-    addr.sdn_family = AF_DECnet;
-
-    addr.sdn_add.a_len = nodeaddr->n_length;
-    memcpy(addr.sdn_add.a_addr, nodeaddr->n_addr, addr.sdn_add.a_len);
-
-    addr.sdn_objnamel = sprintf((char *)addr.sdn_objname, "X$X%d", port);
-    if(addr.sdn_objnamel < 0)
-        return -1;
-    addr.sdn_objnum = 0;
-
-    fd = _xcb_socket(PF_DECnet, SOCK_STREAM, 0);
-    if(fd == -1)
-        return -1;
-
-    memset(&accessdata, 0, sizeof(accessdata));
-    accessdata.acc_accl = sprintf((char*)accessdata.acc_acc, "%d", getuid());
-    if(accessdata.acc_accl < 0)
-        return -1;
-    setsockopt(fd, DNPROTO_NSP, SO_CONACCESS, &accessdata, sizeof(accessdata));
-
-    if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1) {
-        close(fd);
-        return -1;
-    }
-    return fd;
-}
-#endif
-
-static int _xcb_open_tcp(const char *host, char *protocol, const unsigned short port)
-{
-    int fd = -1;
-    struct addrinfo hints;
-    char service[6]; /* "65535" with the trailing '\0' */
-    struct addrinfo *results, *addr;
-    char *bracket;
-
-    if (protocol && strcmp("tcp",protocol) && strcmp("inet",protocol)
-#ifdef AF_INET6
-	         && strcmp("inet6",protocol)
-#endif
-	)
-        return -1;
-	
-    if (*host == '\0')
-	host = "localhost";
-
-    memset(&hints, 0, sizeof(hints));
-#ifdef AI_ADDRCONFIG
-    hints.ai_flags |= AI_ADDRCONFIG;
-#endif
-#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(fd >= 0) {
-            int on = 1;
-            setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on));
-	    setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on));
-
-            if (connect(fd, addr->ai_addr, addr->ai_addrlen) >= 0)
-                break;
-            close(fd);
-            fd = -1;
-        }
-    }
-    freeaddrinfo(results);
-    return fd;
-}
-
-#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_connection_t *) &error_connection;
-        goto out;
-    } else
-        fd = _xcb_open(host, protocol, display);
-
-    if(fd == -1) {
-        c = (xcb_connection_t *) &error_connection;
-        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);
-
-out:
-    free(host);
-    free(protocol);
-    return c;
-}
+/* 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. */

+

+#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 <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"

+

+/* must be after "xcbint.h" to get autoconf #defines */

+#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 = NULL;

+        }

+#endif

+

+    if(*host || protocol)

+    {

+        if (protocol

+            || strcmp("unix",host)) { /* follow the old unix: rule */

+

+            /* 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);

+

+    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_open_tcp(const char *host, char *protocol, const unsigned short port)

+{

+    int fd = -1;

+    struct addrinfo hints;

+    char service[6]; /* "65535" with the trailing '\0' */

+    struct addrinfo *results, *addr;

+    char *bracket;

+

+    if (protocol && strcmp("tcp",protocol) && strcmp("inet",protocol)

+#ifdef AF_INET6

+	         && strcmp("inet6",protocol)

+#endif

+	)

+        return -1;

+	

+    if (*host == '\0')

+	host = "localhost";

+

+    memset(&hints, 0, sizeof(hints));

+#ifdef AI_ADDRCONFIG

+    hints.ai_flags |= AI_ADDRCONFIG;

+#endif

+#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(fd >= 0) {

+            int on = 1;

+            setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on));

+	    setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on));

+

+            if (connect(fd, addr->ai_addr, addr->ai_addrlen) >= 0)

+                break;

+            close(fd);

+            fd = -1;

+        }

+    }

+    freeaddrinfo(results);

+    return fd;

+}

+

+#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_connection_t *) &error_connection;

+        goto out;

+    } else

+        fd = _xcb_open(host, protocol, display);

+

+    if(fd == -1) {

+        c = (xcb_connection_t *) &error_connection;

+        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);

+

+out:

+    free(host);

+    free(protocol);

+    return c;

+}