libxcb git update 1/9/2010

1 files changed, 356 insertions, 351 deletions

diff --git a/libxcb/src/xcb_auth.c b/libxcb/src/xcb_auth.c
index d774d1069..e60cb5f98 100644
--- a/libxcb/src/xcb_auth.c
+++ b/libxcb/src/xcb_auth.c
@@ -1,351 +1,356 @@
-/* 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.
- */
-
-/* Authorization systems for the X protocol. */
-
-#include <assert.h>
-#include <X11/Xauth.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <sys/un.h>
-#include <sys/param.h>
-#include <unistd.h>
-#include <stdlib.h>
-
-#include "xcb.h"
-#include "xcbint.h"
-
-#ifdef HASXDMAUTH
-#include <X11/Xdmcp.h>
-#endif
-
-enum auth_protos {
-#ifdef HASXDMAUTH
-    AUTH_XA1,
-#endif
-    AUTH_MC1,
-    N_AUTH_PROTOS
-};
-
-#define AUTH_PROTO_XDM_AUTHORIZATION "XDM-AUTHORIZATION-1"
-#define AUTH_PROTO_MIT_MAGIC_COOKIE "MIT-MAGIC-COOKIE-1"
-
-static char *authnames[N_AUTH_PROTOS] = {
-#ifdef HASXDMAUTH
-    AUTH_PROTO_XDM_AUTHORIZATION,
-#endif
-    AUTH_PROTO_MIT_MAGIC_COOKIE,
-};
-
-static int authnameslen[N_AUTH_PROTOS] = {
-#ifdef HASXDMAUTH
-    sizeof(AUTH_PROTO_XDM_AUTHORIZATION) - 1,
-#endif
-    sizeof(AUTH_PROTO_MIT_MAGIC_COOKIE) - 1,
-};
-
-static size_t memdup(char **dst, void *src, size_t len)
-{
-    if(len)
-	*dst = malloc(len);
-    else
-	*dst = 0;
-    if(!*dst)
-	return 0;
-    memcpy(*dst, src, len);
-    return len;
-}
-
-static int authname_match(enum auth_protos kind, char *name, size_t namelen)
-{
-    if(authnameslen[kind] != namelen)
-	return 0;
-    if(memcmp(authnames[kind], name, namelen))
-	return 0;
-    return 1;
-}
-
-#define SIN6_ADDR(s) (&((struct sockaddr_in6 *)s)->sin6_addr)
-
-static Xauth *get_authptr(struct sockaddr *sockname, int display)
-{
-    char *addr = 0;
-    int addrlen = 0;
-    unsigned short family;
-    char hostnamebuf[256];   /* big enough for max hostname */
-    char dispbuf[40];   /* big enough to hold more than 2^64 base 10 */
-    int dispbuflen;
-
-    family = FamilyLocal; /* 256 */
-    switch(sockname->sa_family)
-    {
-#ifdef AF_INET6
-    case AF_INET6:
-        addr = (char *) SIN6_ADDR(sockname);
-        addrlen = sizeof(*SIN6_ADDR(sockname));
-        if(!IN6_IS_ADDR_V4MAPPED(SIN6_ADDR(sockname)))
-        {
-            if(!IN6_IS_ADDR_LOOPBACK(SIN6_ADDR(sockname)))
-                family = XCB_FAMILY_INTERNET_6;
-            break;
-        }
-        addr += 12;
-        /* if v4-mapped, fall through. */
-#endif
-    case AF_INET:
-        if(!addr)
-            addr = (char *) &((struct sockaddr_in *)sockname)->sin_addr;
-        addrlen = sizeof(((struct sockaddr_in *)sockname)->sin_addr);
-        if(*(in_addr_t *) addr != htonl(INADDR_LOOPBACK))
-            family = XCB_FAMILY_INTERNET;
-        break;
-    case AF_UNIX:
-        break;
-    default:
-        return 0;   /* cannot authenticate this family */
-    }
-
-    dispbuflen = snprintf(dispbuf, sizeof(dispbuf), "%d", display);
-    if(dispbuflen < 0)
-        return 0;
-    /* snprintf may have truncate our text */
-    dispbuflen = MIN(dispbuflen, sizeof(dispbuf) - 1);
-
-    if (family == FamilyLocal) {
-        if (gethostname(hostnamebuf, sizeof(hostnamebuf)) == -1)
-            return 0;   /* do not know own hostname */
-        addr = hostnamebuf;
-        addrlen = strlen(addr);
-    }
-
-    return XauGetBestAuthByAddr (family,
-                                 (unsigned short) addrlen, addr,
-                                 (unsigned short) dispbuflen, dispbuf,
-                                 N_AUTH_PROTOS, authnames, authnameslen);
-}
-
-#ifdef HASXDMAUTH
-static int next_nonce(void)
-{
-    static int nonce = 0;
-    static pthread_mutex_t nonce_mutex = PTHREAD_MUTEX_INITIALIZER;
-    int ret;
-    pthread_mutex_lock(&nonce_mutex);
-    ret = nonce++;
-    pthread_mutex_unlock(&nonce_mutex);
-    return ret;
-}
-
-static void do_append(char *buf, int *idxp, void *val, size_t valsize) {
-    memcpy(buf + *idxp, val, valsize);
-    *idxp += valsize;
-}
-#endif
-     
-static int compute_auth(xcb_auth_info_t *info, Xauth *authptr, struct sockaddr *sockname)
-{
-    if (authname_match(AUTH_MC1, authptr->name, authptr->name_length)) {
-        info->datalen = memdup(&info->data, authptr->data, authptr->data_length);
-        if(!info->datalen)
-            return 0;
-        return 1;
-    }
-#ifdef HASXDMAUTH
-#define APPEND(buf,idx,val) do_append((buf),&(idx),&(val),sizeof(val))
-    if (authname_match(AUTH_XA1, authptr->name, authptr->name_length)) {
-	int j;
-
-	info->data = malloc(192 / 8);
-	if(!info->data)
-	    return 0;
-
-	for (j = 0; j < 8; j++)
-	    info->data[j] = authptr->data[j];
-	switch(sockname->sa_family) {
-        case AF_INET:
-            /*block*/ {
-	    struct sockaddr_in *si = (struct sockaddr_in *) sockname;
-	    APPEND(info->data, j, si->sin_addr.s_addr);
-	    APPEND(info->data, j, si->sin_port);
-	}
-	break;
-#ifdef AF_INET6
-        case AF_INET6:
-            /*block*/ {
-            struct sockaddr_in6 *si6 = (struct sockaddr_in6 *) sockname;
-            if(IN6_IS_ADDR_V4MAPPED(SIN6_ADDR(sockname)))
-            {
-                do_append(info->data, &j, &si6->sin6_addr.s6_addr[12], 4);
-                APPEND(info->data, j, si6->sin6_port);
-            }
-            else
-            {
-                /* XDM-AUTHORIZATION-1 does not handle IPv6 correctly.  Do the
-                   same thing Xlib does: use all zeroes for the 4-byte address
-                   and 2-byte port number. */
-                uint32_t fakeaddr = 0;
-                uint16_t fakeport = 0;
-                APPEND(info->data, j, fakeaddr);
-                APPEND(info->data, j, fakeport);
-            }
-        }
-        break;
-#endif
-        case AF_UNIX:
-            /*block*/ {
-	    uint32_t fakeaddr = htonl(0xffffffff - next_nonce());
-	    uint16_t fakeport = htons(getpid());
-	    APPEND(info->data, j, fakeaddr);
-	    APPEND(info->data, j, fakeport);
-	}
-	break;
-        default:
-            free(info->data);
-            return 0;   /* do not know how to build this */
-	}
-	{
-	    uint32_t now = htonl(time(0));
-	    APPEND(info->data, j, now);
-	}
-	assert(j <= 192 / 8);
-	while (j < 192 / 8)
-	    info->data[j++] = 0;
-	info->datalen = j;
-	XdmcpWrap ((unsigned char *) info->data, (unsigned char *) authptr->data + 8, (unsigned char *) info->data, info->datalen);
-	return 1;
-    }
-#undef APPEND
-#endif
-
-    return 0;   /* Unknown authorization type */
-}
-
-/* `sockaddr_un.sun_path' typical size usually ranges between 92 and 108 */
-#define INITIAL_SOCKNAME_SLACK 108
-
-/* Return a dynamically allocated socket address structure according
-   to the value returned by either getpeername() or getsockname()
-   (according to POSIX, applications should not assume a particular
-   length for `sockaddr_un.sun_path') */
-static struct sockaddr *get_peer_sock_name(int (*socket_func)(int,
-							      struct sockaddr *,
-							      socklen_t *),
-					   int fd)
-{
-    socklen_t socknamelen = sizeof(struct sockaddr) + INITIAL_SOCKNAME_SLACK;
-    socklen_t actual_socknamelen = socknamelen;
-    struct sockaddr *sockname = malloc(socknamelen), *new_sockname = NULL;
-
-    if (sockname == NULL)
-        return NULL;
-
-    /* Both getpeername() and getsockname() truncates sockname if
-       there is not enough space and set the required length in
-       actual_socknamelen */
-    if (socket_func(fd, sockname, &actual_socknamelen) == -1)
-        goto sock_or_realloc_error;
-
-    if (actual_socknamelen > socknamelen)
-    {
-        socknamelen = actual_socknamelen;
-
-        if ((new_sockname = realloc(sockname, actual_socknamelen)) == NULL ||
-            socket_func(fd, new_sockname, &actual_socknamelen) == -1 ||
-            actual_socknamelen > socknamelen) 
-            goto sock_or_realloc_error;
-
-        sockname = new_sockname;
-    }
-
-    return sockname;
-
- sock_or_realloc_error:
-    free(sockname);
-    return NULL;
-}
-
-int _xcb_get_auth_info(int fd, xcb_auth_info_t *info, int display)
-{
-    /* code adapted from Xlib/ConnDis.c, xtrans/Xtranssocket.c,
-       xtrans/Xtransutils.c */
-    struct sockaddr *sockname = NULL;
-    int gotsockname = 0;
-    Xauth *authptr = 0;
-    int ret = 1;
-
-    /* Some systems like hpux or Hurd do not expose peer names
-     * for UNIX Domain Sockets, but this is irrelevant,
-     * since compute_auth() ignores the peer name in this
-     * case anyway.*/
-    if ((sockname = get_peer_sock_name(getpeername, fd)) == NULL)
-    {
-        if ((sockname = get_peer_sock_name(getsockname, fd)) == NULL)
-            return 0;   /* can only authenticate sockets */
-        if (sockname->sa_family != AF_UNIX)
-        {
-            free(sockname);
-            return 0;   /* except for AF_UNIX, sockets should have peernames */
-        }
-        gotsockname = 1;
-    }
-
-    authptr = get_authptr(sockname, display);
-    if (authptr == 0)
-    {
-        free(sockname);
-        return 0;   /* cannot find good auth data */
-    }
-
-    info->namelen = memdup(&info->name, authptr->name, authptr->name_length);
-    if (!info->namelen)
-        goto no_auth;   /* out of memory */
-
-    if (!gotsockname && (sockname = get_peer_sock_name(getsockname, fd)) == NULL)
-    {
-        free(info->name);
-        goto no_auth;   /* can only authenticate sockets */
-    }
-
-    ret = compute_auth(info, authptr, sockname);
-    if(!ret)
-    {
-        free(info->name);
-        goto no_auth;   /* cannot build auth record */
-    }
-
-    free(sockname);
-    sockname = NULL;
-
-    XauDisposeAuth(authptr);
-    return ret;
-
- no_auth:
-    free(sockname);
-
-    info->name = 0;
-    info->namelen = 0;
-    XauDisposeAuth(authptr);
-    return 0;
-}
+/* 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.

+ */

+

+/* Authorization systems for the X protocol. */

+

+#include <assert.h>

+#include <X11/Xauth.h>

+#include <sys/param.h>

+#include <unistd.h>

+#include <stdlib.h>

+

+#ifdef _WIN32

+#include "xcb_windefs.h"

+#else

+#include <sys/socket.h>

+#include <netinet/in.h>

+#include <sys/un.h>

+#endif /* _WIN32 */

+

+#include "xcb.h"

+#include "xcbint.h"

+

+#ifdef HASXDMAUTH

+#include <X11/Xdmcp.h>

+#endif

+

+enum auth_protos {

+#ifdef HASXDMAUTH

+    AUTH_XA1,

+#endif

+    AUTH_MC1,

+    N_AUTH_PROTOS

+};

+

+#define AUTH_PROTO_XDM_AUTHORIZATION "XDM-AUTHORIZATION-1"

+#define AUTH_PROTO_MIT_MAGIC_COOKIE "MIT-MAGIC-COOKIE-1"

+

+static char *authnames[N_AUTH_PROTOS] = {

+#ifdef HASXDMAUTH

+    AUTH_PROTO_XDM_AUTHORIZATION,

+#endif

+    AUTH_PROTO_MIT_MAGIC_COOKIE,

+};

+

+static int authnameslen[N_AUTH_PROTOS] = {

+#ifdef HASXDMAUTH

+    sizeof(AUTH_PROTO_XDM_AUTHORIZATION) - 1,

+#endif

+    sizeof(AUTH_PROTO_MIT_MAGIC_COOKIE) - 1,

+};

+

+static size_t memdup(char **dst, void *src, size_t len)

+{

+    if(len)

+	*dst = malloc(len);

+    else

+	*dst = 0;

+    if(!*dst)

+	return 0;

+    memcpy(*dst, src, len);

+    return len;

+}

+

+static int authname_match(enum auth_protos kind, char *name, size_t namelen)

+{

+    if(authnameslen[kind] != namelen)

+	return 0;

+    if(memcmp(authnames[kind], name, namelen))

+	return 0;

+    return 1;

+}

+

+#define SIN6_ADDR(s) (&((struct sockaddr_in6 *)s)->sin6_addr)

+

+static Xauth *get_authptr(struct sockaddr *sockname, int display)

+{

+    char *addr = 0;

+    int addrlen = 0;

+    unsigned short family;

+    char hostnamebuf[256];   /* big enough for max hostname */

+    char dispbuf[40];   /* big enough to hold more than 2^64 base 10 */

+    int dispbuflen;

+

+    family = FamilyLocal; /* 256 */

+    switch(sockname->sa_family)

+    {

+#ifdef AF_INET6

+    case AF_INET6:

+        addr = (char *) SIN6_ADDR(sockname);

+        addrlen = sizeof(*SIN6_ADDR(sockname));

+        if(!IN6_IS_ADDR_V4MAPPED(SIN6_ADDR(sockname)))

+        {

+            if(!IN6_IS_ADDR_LOOPBACK(SIN6_ADDR(sockname)))

+                family = XCB_FAMILY_INTERNET_6;

+            break;

+        }

+        addr += 12;

+        /* if v4-mapped, fall through. */

+#endif

+    case AF_INET:

+        if(!addr)

+            addr = (char *) &((struct sockaddr_in *)sockname)->sin_addr;

+        addrlen = sizeof(((struct sockaddr_in *)sockname)->sin_addr);

+        if(*(in_addr_t *) addr != htonl(INADDR_LOOPBACK))

+            family = XCB_FAMILY_INTERNET;

+        break;

+    case AF_UNIX:

+        break;

+    default:

+        return 0;   /* cannot authenticate this family */

+    }

+

+    dispbuflen = snprintf(dispbuf, sizeof(dispbuf), "%d", display);

+    if(dispbuflen < 0)

+        return 0;

+    /* snprintf may have truncate our text */

+    dispbuflen = MIN(dispbuflen, sizeof(dispbuf) - 1);

+

+    if (family == FamilyLocal) {

+        if (gethostname(hostnamebuf, sizeof(hostnamebuf)) == -1)

+            return 0;   /* do not know own hostname */

+        addr = hostnamebuf;

+        addrlen = strlen(addr);

+    }

+

+    return XauGetBestAuthByAddr (family,

+                                 (unsigned short) addrlen, addr,

+                                 (unsigned short) dispbuflen, dispbuf,

+                                 N_AUTH_PROTOS, authnames, authnameslen);

+}

+

+#ifdef HASXDMAUTH

+static int next_nonce(void)

+{

+    static int nonce = 0;

+    static pthread_mutex_t nonce_mutex = PTHREAD_MUTEX_INITIALIZER;

+    int ret;

+    pthread_mutex_lock(&nonce_mutex);

+    ret = nonce++;

+    pthread_mutex_unlock(&nonce_mutex);

+    return ret;

+}

+

+static void do_append(char *buf, int *idxp, void *val, size_t valsize) {

+    memcpy(buf + *idxp, val, valsize);

+    *idxp += valsize;

+}

+#endif

+     

+static int compute_auth(xcb_auth_info_t *info, Xauth *authptr, struct sockaddr *sockname)

+{

+    if (authname_match(AUTH_MC1, authptr->name, authptr->name_length)) {

+        info->datalen = memdup(&info->data, authptr->data, authptr->data_length);

+        if(!info->datalen)

+            return 0;

+        return 1;

+    }

+#ifdef HASXDMAUTH

+#define APPEND(buf,idx,val) do_append((buf),&(idx),&(val),sizeof(val))

+    if (authname_match(AUTH_XA1, authptr->name, authptr->name_length)) {

+	int j;

+

+	info->data = malloc(192 / 8);

+	if(!info->data)

+	    return 0;

+

+	for (j = 0; j < 8; j++)

+	    info->data[j] = authptr->data[j];

+	switch(sockname->sa_family) {

+        case AF_INET:

+            /*block*/ {

+	    struct sockaddr_in *si = (struct sockaddr_in *) sockname;

+	    APPEND(info->data, j, si->sin_addr.s_addr);

+	    APPEND(info->data, j, si->sin_port);

+	}

+	break;

+#ifdef AF_INET6

+        case AF_INET6:

+            /*block*/ {

+            struct sockaddr_in6 *si6 = (struct sockaddr_in6 *) sockname;

+            if(IN6_IS_ADDR_V4MAPPED(SIN6_ADDR(sockname)))

+            {

+                do_append(info->data, &j, &si6->sin6_addr.s6_addr[12], 4);

+                APPEND(info->data, j, si6->sin6_port);

+            }

+            else

+            {

+                /* XDM-AUTHORIZATION-1 does not handle IPv6 correctly.  Do the

+                   same thing Xlib does: use all zeroes for the 4-byte address

+                   and 2-byte port number. */

+                uint32_t fakeaddr = 0;

+                uint16_t fakeport = 0;

+                APPEND(info->data, j, fakeaddr);

+                APPEND(info->data, j, fakeport);

+            }

+        }

+        break;

+#endif

+        case AF_UNIX:

+            /*block*/ {

+	    uint32_t fakeaddr = htonl(0xffffffff - next_nonce());

+	    uint16_t fakeport = htons(getpid());

+	    APPEND(info->data, j, fakeaddr);

+	    APPEND(info->data, j, fakeport);

+	}

+	break;

+        default:

+            free(info->data);

+            return 0;   /* do not know how to build this */

+	}

+	{

+	    uint32_t now = htonl(time(0));

+	    APPEND(info->data, j, now);

+	}

+	assert(j <= 192 / 8);

+	while (j < 192 / 8)

+	    info->data[j++] = 0;

+	info->datalen = j;

+	XdmcpWrap ((unsigned char *) info->data, (unsigned char *) authptr->data + 8, (unsigned char *) info->data, info->datalen);

+	return 1;

+    }

+#undef APPEND

+#endif

+

+    return 0;   /* Unknown authorization type */

+}

+

+/* `sockaddr_un.sun_path' typical size usually ranges between 92 and 108 */

+#define INITIAL_SOCKNAME_SLACK 108

+

+/* Return a dynamically allocated socket address structure according

+   to the value returned by either getpeername() or getsockname()

+   (according to POSIX, applications should not assume a particular

+   length for `sockaddr_un.sun_path') */

+static struct sockaddr *get_peer_sock_name(int (*socket_func)(int,

+							      struct sockaddr *,

+							      socklen_t *),

+					   int fd)

+{

+    socklen_t socknamelen = sizeof(struct sockaddr) + INITIAL_SOCKNAME_SLACK;

+    socklen_t actual_socknamelen = socknamelen;

+    struct sockaddr *sockname = malloc(socknamelen), *new_sockname = NULL;

+

+    if (sockname == NULL)

+        return NULL;

+

+    /* Both getpeername() and getsockname() truncates sockname if

+       there is not enough space and set the required length in

+       actual_socknamelen */

+    if (socket_func(fd, sockname, &actual_socknamelen) == -1)

+        goto sock_or_realloc_error;

+

+    if (actual_socknamelen > socknamelen)

+    {

+        socknamelen = actual_socknamelen;

+

+        if ((new_sockname = realloc(sockname, actual_socknamelen)) == NULL ||

+            socket_func(fd, new_sockname, &actual_socknamelen) == -1 ||

+            actual_socknamelen > socknamelen) 

+            goto sock_or_realloc_error;

+

+        sockname = new_sockname;

+    }

+

+    return sockname;

+

+ sock_or_realloc_error:

+    free(sockname);

+    return NULL;

+}

+

+int _xcb_get_auth_info(int fd, xcb_auth_info_t *info, int display)

+{

+    /* code adapted from Xlib/ConnDis.c, xtrans/Xtranssocket.c,

+       xtrans/Xtransutils.c */

+    struct sockaddr *sockname = NULL;

+    int gotsockname = 0;

+    Xauth *authptr = 0;

+    int ret = 1;

+

+    /* Some systems like hpux or Hurd do not expose peer names

+     * for UNIX Domain Sockets, but this is irrelevant,

+     * since compute_auth() ignores the peer name in this

+     * case anyway.*/

+    if ((sockname = get_peer_sock_name(getpeername, fd)) == NULL)

+    {

+        if ((sockname = get_peer_sock_name(getsockname, fd)) == NULL)

+            return 0;   /* can only authenticate sockets */

+        if (sockname->sa_family != AF_UNIX)

+        {

+            free(sockname);

+            return 0;   /* except for AF_UNIX, sockets should have peernames */

+        }

+        gotsockname = 1;

+    }

+

+    authptr = get_authptr(sockname, display);

+    if (authptr == 0)

+    {

+        free(sockname);

+        return 0;   /* cannot find good auth data */

+    }

+

+    info->namelen = memdup(&info->name, authptr->name, authptr->name_length);

+    if (!info->namelen)

+        goto no_auth;   /* out of memory */

+

+    if (!gotsockname && (sockname = get_peer_sock_name(getsockname, fd)) == NULL)

+    {

+        free(info->name);

+        goto no_auth;   /* can only authenticate sockets */

+    }

+

+    ret = compute_auth(info, authptr, sockname);

+    if(!ret)

+    {

+        free(info->name);

+        goto no_auth;   /* cannot build auth record */

+    }

+

+    free(sockname);

+    sockname = NULL;

+

+    XauDisposeAuth(authptr);

+    return ret;

+

+ no_auth:

+    free(sockname);

+

+    info->name = 0;

+    info->namelen = 0;

+    XauDisposeAuth(authptr);

+    return 0;

+}