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xserver/hw/dmx/examples/dmxconnect.c
David Reveman d7ef664c3b Use default timeout now attachScreen wont block and restore 
resources anymore.
2008-10-30 03:37:46 -04:00

884 lines
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/*
* Copyright © 2008 Novell, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the name of
* Novell, Inc. not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior permission.
* Novell, Inc. makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* NOVELL, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
* NO EVENT SHALL NOVELL, INC. BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Author: David Reveman <davidr@novell.com>
*/
/*
* X authentication and transport code adopted from libxcb
*
* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp.
*/
#include <dbus/dbus.h>
#include <stdio.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 <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#ifdef DNETCONN
#include <netdnet/dnetdb.h>
#include <netdnet/dn.h>
#endif
#include <netdb.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <xcb/xcb.h>
#ifdef HASXDMAUTH
#include <X11/Xdmcp.h>
#endif
#include "dmxdbus.h"
enum auth_protos {
#ifdef HASXDMAUTH
AUTH_XA1,
#endif
AUTH_MC1,
N_AUTH_PROTOS
};
static char *authnames[N_AUTH_PROTOS] = {
#ifdef HASXDMAUTH
"XDM-AUTHORIZATION-1",
#endif
"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, int namelen)
{
if(strlen(authnames[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, unsigned int socknamelen,
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 authnamelens[N_AUTH_PROTOS];
int i;
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 */
}
snprintf(dispbuf, sizeof(dispbuf), "%d", display);
if (family == FamilyLocal) {
if (gethostname(hostnamebuf, sizeof(hostnamebuf)) == -1)
return 0; /* do not know own hostname */
addr = hostnamebuf;
addrlen = strlen(addr);
}
for (i = 0; i < N_AUTH_PROTOS; i++)
authnamelens[i] = strlen(authnames[i]);
return XauGetBestAuthByAddr (family,
(unsigned short) addrlen, addr,
(unsigned short) strlen(dispbuf), dispbuf,
N_AUTH_PROTOS, authnames, authnamelens);
}
#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)))
{
APPEND(info->data, j, si6->sin6_addr.s6_addr[12]);
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 */
}
int _get_auth_info (int fd, xcb_auth_info_t *info, int display)
{
/* code adapted from Xlib/ConnDis.c, xtrans/Xtranssocket.c,
xtrans/Xtransutils.c */
char sockbuf[sizeof(struct sockaddr) + MAXPATHLEN];
unsigned int socknamelen = sizeof(sockbuf); /* need extra space */
struct sockaddr *sockname = (struct sockaddr *) &sockbuf;
Xauth *authptr = 0;
int ret = 1;
if (getpeername(fd, sockname, &socknamelen) == -1)
return 0; /* can only authenticate sockets */
authptr = get_authptr(sockname, socknamelen, display);
if (authptr == 0)
return 0; /* cannot find good auth data */
info->namelen = memdup(&info->name, authptr->name, authptr->name_length);
if(info->namelen)
ret = compute_auth(info, authptr, sockname);
if(!ret)
{
free(info->name);
info->name = 0;
info->namelen = 0;
}
XauDisposeAuth(authptr);
return ret;
}
static int _xcb_open_tcp(char *host, char *protocol, const unsigned short port);
static int _xcb_open_unix(char *protocol, const char *file);
#ifdef DNETCONN
static int _xcb_open_decnet(const char *host, char *protocol, const unsigned short port);
#endif
static int _xcb_open(char *host, char *protocol, const int display)
{
int fd;
static const char base[] = "/tmp/.X11-unix/X";
char file[sizeof(base) + 20];
if(*host)
{
#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);
}
}
/* display specifies Unix socket */
snprintf(file, sizeof(file), "%s%d", base, display);
return _xcb_open_unix(protocol, file);
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);
sprintf((char *)addr.sdn_objname, "X$X%d", port);
addr.sdn_objnamel = strlen((char *)addr.sdn_objname);
addr.sdn_objnum = 0;
fd = socket(PF_DECnet, SOCK_STREAM, 0);
if(fd == -1)
return -1;
memset(&accessdata, 0, sizeof(accessdata));
sprintf((char*)accessdata.acc_acc, "%d", getuid());
accessdata.acc_accl = strlen((char *)accessdata.acc_acc);
setsockopt(fd, DNPROTO_NSP, SO_CONACCESS, &accessdata, sizeof(accessdata));
if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1)
return -1;
return fd;
}
#endif
static int _xcb_open_tcp(char *host, char *protocol, const unsigned short port)
{
int fd = -1;
struct addrinfo hints = { 0
#ifdef AI_ADDRCONFIG
| AI_ADDRCONFIG
#endif
#ifdef AI_NUMERICSERV
| AI_NUMERICSERV
#endif
, AF_UNSPEC, SOCK_STREAM };
char service[6]; /* "65535" with the trailing '\0' */
struct addrinfo *results, *addr;
char *bracket;
if (protocol && strcmp("tcp",protocol))
return -1;
#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 = socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
if(fd >= 0 && connect(fd, addr->ai_addr, addr->ai_addrlen) >= 0)
break;
fd = -1;
}
freeaddrinfo(results);
return fd;
}
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;
#if HAVE_SOCKADDR_SUN_LEN
addr.sun_len = SUN_LEN(&addr);
#endif
fd = socket(AF_UNIX, SOCK_STREAM, 0);
if(fd == -1)
return -1;
if(connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1)
return -1;
return fd;
}
xcb_connection_t *
connect_to_display (const char *name,
xcb_auth_info_t *auth)
{
int fd, len, screen, display = 0;
char *host;
char *protocol = NULL;
char *slash;
xcb_connection_t *c;
slash = strrchr(name, '/');
if (slash) {
len = slash - name;
protocol = malloc(len + 1);
if(!protocol)
return 0;
memcpy (protocol, name, len);
(protocol)[len] = '\0';
}
if (!xcb_parse_display (name, &host, &display, &screen))
return NULL;
fd = _xcb_open (host, protocol, display);
free (host);
if (fd == -1)
return NULL;
if (_get_auth_info (fd, auth, display))
{
c = xcb_connect_to_fd (fd, auth);
}
else
{
c = xcb_connect_to_fd (fd, 0);
auth->name = NULL;
auth->data = NULL;
}
return c;
}
void
append_auth_info (DBusMessageIter *iter,
xcb_auth_info_t *auth)
{
DBusMessageIter subiter;
int i;
dbus_message_iter_open_container (iter,
DBUS_TYPE_ARRAY,
DBUS_TYPE_BYTE_AS_STRING,
&subiter);
for (i = 0; i < auth->namelen; i++)
dbus_message_iter_append_basic (&subiter,
DBUS_TYPE_BYTE,
&auth->name[i]);
dbus_message_iter_close_container (iter, &subiter);
dbus_message_iter_open_container (iter,
DBUS_TYPE_ARRAY,
DBUS_TYPE_BYTE_AS_STRING,
&subiter);
for (i = 0; i < auth->datalen; i++)
dbus_message_iter_append_basic (&subiter,
DBUS_TYPE_BYTE,
&auth->data[i]);
dbus_message_iter_close_container (iter, &subiter);
}
static const unsigned int hexvalues[256] = {
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* 9 */
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* 19 */
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* 29 */
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* 39 */
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, /* 49 */
0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0x0, 0x0, /* 59 */
0x0, 0x0, 0x0, 0x0, 0x0, 0xa, 0xb, 0xb, 0xd, 0xe, /* 69 */
0xf, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* 79 */
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* 89 */
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xa, 0xb, 0xc, /* 99 */
0xd, 0xe, 0xf, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0
};
int
main (int argc, char **argv)
{
DBusError err;
DBusConnection *conn;
DBusMessage *message;
DBusMessage *reply;
DBusMessageIter iter;
int i, ret, fd, len, screen_num, display = 0;
char *host;
char *protocol = NULL;
char *slash;
xcb_connection_t *c = NULL;
xcb_auth_info_t auth = { 0 };
char *displayname = NULL;
char *name = NULL;
char *auth_name = NULL;
char *auth_data = NULL;
int dmxdisplay = 0;
int dmxscreen = -1;
int viewonly = 0;
uint32_t window = 0;
uint32_t screen = 0;
dbus_bool_t core = TRUE;
char dest[256];
char path[256];
uint32_t index;
for (i = 1; i < argc; i++)
{
if (*argv[i] == '-')
{
if (strcmp (argv[i], "-display") == 0)
{
if (++i < argc)
dmxdisplay = strtol (argv[i], NULL, 0);
}
else if (strcmp (argv[i], "-screen") == 0)
{
if (++i < argc)
dmxscreen = strtol (argv[i], NULL, 0);
}
else if (strcmp (argv[i], "-window") == 0)
{
if (++i < argc)
window = strtol (argv[i], NULL, 0);
}
else if (strcmp (argv[i], "-name") == 0)
{
if (++i < argc)
name = argv[i];
}
else if (strcmp (argv[i], "-authtype") == 0)
{
if (++i < argc)
auth_name = argv[i];
}
else if (strcmp (argv[i], "-authdata") == 0)
{
if (++i < argc)
auth_data = argv[i];
}
else if (strcmp (argv[i], "-viewonly") == 0)
{
viewonly = TRUE;
}
else
{
break;
}
}
else if (!displayname)
{
displayname = argv[i];
}
}
if (i < argc || !displayname)
{
fprintf (stderr,
"usage: %s "
"[-display <Xdmx-display>] "
"[-screen <Xdmx-screen>] "
"[-window <wid>] "
"[-name <name>] "
"[-authtype <protoname>] "
"[-authdata <hexkey>] "
"[-viewonly] "
"host[:port]\n",
argv[0]);
return 1;
}
dbus_error_init (&err);
conn = dbus_bus_get (DBUS_BUS_SYSTEM, &err);
if (dbus_error_is_set (&err))
{
fprintf (stderr, "DBus Error: %s\n", err.message);
dbus_error_free (&err);
return 1;
}
if (!xcb_parse_display (displayname, &host, &display, &screen_num))
{
fprintf (stderr, "Bad display name: %s\n", displayname);
return 1;
}
if (!name)
{
name = host;
if (!name)
name = "localhost";
}
slash = strrchr(displayname, '/');
if (slash) {
len = slash - displayname;
protocol = malloc(len + 1);
if(!protocol)
{
fprintf (stderr, "Not enough memory\n");
free (host);
return 1;
}
memcpy (protocol, displayname, len);
(protocol)[len] = '\0';
}
fd = _xcb_open (host, protocol, display);
if (protocol)
free (protocol);
if (fd == -1)
{
fprintf (stderr, "Can't open socket: %s\n", displayname);
free (host);
return 1;
}
auth.namelen = 0;
auth.datalen = 0;
if (auth_name && auth_data)
{
char *data, *ptr, *hexdata = auth_data;
int size;
size = strlen (hexdata) / 2;
data = ptr = malloc (size);
if (data)
{
int j;
for (j = 0; j < size; j++)
{
*ptr++ = (char)
((hexvalues[(int) hexdata[0]] * 16) +
(hexvalues[(int) hexdata[1]]));
hexdata += 2;
}
auth.namelen = strlen (auth_name);
auth.name = strdup (auth_name);
auth.datalen = size;
auth.data = data;
c = xcb_connect_to_fd (fd, &auth);
if (!c)
{
free (auth.name);
free (auth.data);
auth.namelen = 0;
auth.datalen = 0;
}
}
}
if (!c)
{
if (_get_auth_info (fd, &auth, display))
{
c = xcb_connect_to_fd (fd, &auth);
if (!c)
{
free (auth.name);
free (auth.data);
auth.namelen = 0;
auth.datalen = 0;
}
}
else
{
c = xcb_connect_to_fd (fd, 0);
}
if (!c)
{
fprintf (stderr, "Can't open display: %s\n", displayname);
free (host);
return 1;
}
}
sprintf (dest, "org.x.config.display%d", dmxdisplay);
sprintf (path, "/org/x/config/dmx/%d", dmxdisplay);
if (!name)
name = host;
if (dmxscreen >= 0)
screen = dmxscreen;
do
{
message = dbus_message_new_method_call (dest,
path,
"org.x.config.dmx",
"attachScreen");
if (!message)
{
dbus_set_error (&err,
DBUS_ERROR_NO_MEMORY,
"Not enough memory");
break;
}
dbus_message_iter_init_append (message, &iter);
dbus_message_iter_append_basic (&iter,
DBUS_TYPE_UINT32,
&screen);
dbus_message_iter_append_basic (&iter,
DBUS_TYPE_STRING,
&displayname);
dbus_message_iter_append_basic (&iter,
DBUS_TYPE_STRING,
&name);
dbus_message_iter_append_basic (&iter,
DBUS_TYPE_UINT32,
&window);
append_auth_info (&iter, &auth);
reply = dbus_connection_send_with_reply_and_block (conn,
message,
-1,
&err);
dbus_message_unref (message);
if (dbus_error_is_set (&err))
{
if (dmxscreen < 0)
{
if (strcmp (err.name, DMX_ERROR_SCREEN_IN_USE) == 0)
{
dbus_error_free (&err);
dbus_error_init (&err);
screen++; /* try next screen */
}
else
{
if (strcmp (err.name, DMX_ERROR_INVALID_SCREEN) == 0)
{
dbus_error_free (&err);
dbus_error_init (&err);
dbus_set_error (&err,
DMX_ERROR_SCREEN_IN_USE,
"No available screens on display %d",
dmxdisplay);
}
break;
}
}
else
{
break;
}
}
} while (!reply);
xcb_disconnect (c);
if (dbus_error_is_set (&err))
{
fprintf (stderr, "Error: %s\n", err.message);
dbus_error_free (&err);
return 1;
}
dbus_message_unref (reply);
/* failing to add input is not an error */
if (!viewonly)
{
message = dbus_message_new_method_call (dest,
path,
"org.x.config.dmx",
"addInput");
if (!message)
{
fprintf (stderr, "Warning: addInput: Not enough memory\n");
return 0;
}
dbus_message_iter_init_append (message, &iter);
dbus_message_iter_append_basic (&iter,
DBUS_TYPE_UINT32,
&screen);
dbus_message_iter_append_basic (&iter,
DBUS_TYPE_BOOLEAN,
&core);
reply = dbus_connection_send_with_reply_and_block (conn,
message,
-1,
&err);
dbus_message_unref (message);
if (dbus_error_is_set (&err))
{
fprintf (stderr, "Warning: addInput: %s\n", err.message);
dbus_error_free (&err);
return 0;
}
dbus_message_unref (reply);
}
message = dbus_message_new_method_call (dest,
path,
"org.x.config.dmx",
"enableScreen");
if (!message)
{
fprintf (stderr, "Warning: enableScreen: Not enough memory\n");
return 0;
}
dbus_message_iter_init_append (message, &iter);
dbus_message_iter_append_basic (&iter,
DBUS_TYPE_UINT32,
&screen);
if (dbus_connection_send (conn, message, NULL))
dbus_connection_flush (conn);
else
fprintf (stderr, "Warning: enableScreen failed\n");
dbus_message_unref (message);
return 0;
}
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