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/* GDM - The GNOME Display Manager
* Copyright (C) 1998, 1999, 2000 Martin K. Petersen <mkp@mkp.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* This file contains the XDMCP implementation for managing remote
* displays.
*/
/* Theory of operation:
*
* Process idles waiting for UDP packets on port 177.
* Incoming packets are decoded and checked against tcp_wrapper.
*
* A typical session looks like this:
*
* Display sends Query/BroadcastQuery to Manager.
*
* Manager selects an appropriate authentication scheme from the
* display's list of supported ones and sends Willing/Unwilling.
*
* Assuming the display accepts the auth. scheme it sends back a
* Request.
*
* If the manager accepts to service the display (i.e. loadavg is low)
* it sends back an Accept containing a unique SessionID. The
* SessionID is stored in an accept queue by the Manager. Should the
* manager refuse to start a session a Decline is sent to the display.
*
* The display returns a Manage request containing the supplied
* SessionID. The manager will then start a session on the display. In
* case the SessionID is not on the accept queue the manager returns
* Refuse. If the manager fails to open the display for connections
* Failed is returned.
*
* During the session the display periodically sends KeepAlive packets
* to the manager. The manager responds with Alive.
*
* Similarly the manager xpings the display once in a while and shuts
* down the connection on failure.
*
*/
#include "config.h"
#ifdef HAVE_LIBXDMCP
#include <stdio.h>
#include <unistd.h>
#include <time.h>
#include <stdlib.h>
#include <syslog.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <errno.h>
#include <X11/Xlib.h>
#include <X11/Xmd.h>
#include <X11/Xdmcp.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/utsname.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <fcntl.h>
#ifdef HAVE_SYS_SOCKIO_H
#include <sys/sockio.h>
#endif
#ifdef HAVE_TCPWRAPPERS
#include <tcpd.h>
#endif
#endif /* HAVE_LIBXDMCP */
#include <glib/gi18n.h>
#ifdef HAVE_LIBXDMCP
#include "gdm.h"
#include "display.h"
#include "auth.h"
#endif /* HAVE_LIBXDMCP */
#include "misc.h"
#include "choose.h"
#include "xdmcp.h"
#include "cookie.h"
#include "gdmconfig.h"
#define XDMCP_MULTICAST_ADDRESS "ff02::1" /*This is to be changed when the Xdmcp Multicast address is decided */
int gdm_xdmcpfd = -1;
#ifdef HAVE_LIBXDMCP
/* TCP Wrapper syslog control */
gint allow_severity = LOG_INFO;
gint deny_severity = LOG_WARNING;
static guint xdmcp_source = 0;
static CARD32 globsessid;
static gchar *sysid;
static ARRAY8 servhost;
static XdmcpBuffer buf;
static gboolean initted = FALSE;
extern GSList *displays;
extern gint xdmcp_pending;
extern gint xdmcp_sessions;
/* Local prototypes */
static gboolean gdm_xdmcp_decode_packet (GIOChannel *source,
GIOCondition cond,
gpointer data);
/*************************** IPv6 specific prototypes *****************************/
#ifdef ENABLE_IPV6
static void gdm_xdmcp_handle_query (struct sockaddr_storage *clnt_sa,
gint len,
gint type);
static void gdm_xdmcp_handle_forward_query (struct sockaddr_storage *clnt_sa, gint len);
static void gdm_xdmcp_handle_request (struct sockaddr_storage *clnt_sa, gint len);
static void gdm_xdmcp_handle_manage (struct sockaddr_storage *clnt_sa, gint len);
static void gdm_xdmcp_handle_managed_forward (struct sockaddr_storage *clnt_sa, gint len);
static void gdm_xdmcp_handle_got_managed_forward (struct sockaddr_storage *clnt_sa, gint len);
static void gdm_xdmcp_handle_keepalive (struct sockaddr_storage *clnt_sa, gint len);
static void gdm_xdmcp_send_willing (struct sockaddr_storage *clnt_sa);
static void gdm_xdmcp_send_unwilling (struct sockaddr_storage *clnt_sa, gint type);
static void gdm_xdmcp_send_accept (GdmHostent *he, struct sockaddr_storage *clnt_sa,
gint displaynum);
static void gdm_xdmcp_send_decline (struct sockaddr_storage *clnt_sa, const char *reason);
static void gdm_xdmcp_send_refuse (struct sockaddr_storage *clnt_sa, CARD32 sessid);
static void gdm_xdmcp_send_failed (struct sockaddr_storage *clnt_sa, CARD32 sessid);
static void gdm_xdmcp_send_alive (struct sockaddr_storage *clnt_sa, CARD16 dspnum, CARD32 sessid);
static void gdm_xdmcp_send_managed_forward (struct sockaddr_storage *clnt_sa,
struct sockaddr_storage *origin);
static void gdm_xdmcp_send_forward_query6 (GdmIndirectDisplay *id,
struct sockaddr_in6 *clnt_sa,
struct in6_addr *display_addr,
ARRAYofARRAY8Ptr authlist);
static gboolean gdm_xdmcp_host_allow (struct sockaddr_storage *clnt_sa);
static GdmForwardQuery * gdm_forward_query_alloc (struct sockaddr_storage *mgr_sa,
struct sockaddr_storage *dsp_sa);
static GdmForwardQuery * gdm_forward_query_lookup (struct sockaddr_storage *clnt_sa);
static void gdm_xdmcp_whack_queued_managed_forwards6 (struct sockaddr_in6 *clnt_sa,
struct in6_addr *origin);
static void gdm_xdmcp_send_got_managed_forward6 (struct sockaddr_in6 *clnt_sa,
struct in6_addr *origin);
static int gdm_xdmcp_displays_from_host (struct sockaddr_storage *addr);
static GdmDisplay *gdm_xdmcp_display_lookup_by_host (struct sockaddr_storage *addr, int dspnum);
static GdmDisplay *gdm_xdmcp_display_alloc (struct sockaddr_storage *addr, GdmHostent *he, int displaynum);
#else
static void gdm_xdmcp_handle_forward_query (struct sockaddr_in *clnt_sa, gint len);
static void gdm_xdmcp_handle_query (struct sockaddr_in *clnt_sa,
gint len,
gint type);
static void gdm_xdmcp_handle_request (struct sockaddr_in *clnt_sa, gint len);
static void gdm_xdmcp_handle_manage (struct sockaddr_in *clnt_sa, gint len);
static void gdm_xdmcp_handle_managed_forward (struct sockaddr_in *clnt_sa, gint len);
static void gdm_xdmcp_handle_got_managed_forward (struct sockaddr_in *clnt_sa, gint len);
static void gdm_xdmcp_handle_keepalive (struct sockaddr_in *clnt_sa, gint len);
static void gdm_xdmcp_send_willing (struct sockaddr_in *clnt_sa);
static void gdm_xdmcp_send_unwilling (struct sockaddr_in *clnt_sa, gint type);
static void gdm_xdmcp_send_accept (GdmHostent *he /* eaten and freed */,
struct sockaddr_in *clnt_sa,
int displaynum);
static void gdm_xdmcp_send_decline (struct sockaddr_in *clnt_sa, const char *reason);
static void gdm_xdmcp_send_refuse (struct sockaddr_in *clnt_sa, CARD32 sessid);
static void gdm_xdmcp_send_failed (struct sockaddr_in *clnt_sa, CARD32 sessid);
static void gdm_xdmcp_send_alive (struct sockaddr_in *clnt_sa, CARD16 dspnum, CARD32 sessid);
static void gdm_xdmcp_send_managed_forward (struct sockaddr_in *clnt_sa,
struct sockaddr_in *origin);
static gboolean gdm_xdmcp_host_allow (struct sockaddr_in *clnt_sa);
static GdmForwardQuery * gdm_forward_query_alloc (struct sockaddr_in *mgr_sa,
struct sockaddr_in *dsp_sa);
static GdmForwardQuery * gdm_forward_query_lookup (struct sockaddr_in *clnt_sa);
static int gdm_xdmcp_displays_from_host (struct sockaddr_in *addr);
static GdmDisplay *gdm_xdmcp_display_lookup_by_host (struct sockaddr_in *addr, int dspnum);
static GdmDisplay *gdm_xdmcp_display_alloc (struct sockaddr_in *addr, GdmHostent *he, int displaynum);
#endif /*IPv4 / IPv6*/
static void gdm_xdmcp_whack_queued_managed_forwards (struct sockaddr_in *clnt_sa,
struct in_addr *origin);
static void gdm_xdmcp_send_got_managed_forward (struct sockaddr_in *clnt_sa,
struct in_addr *origin);
static void gdm_xdmcp_send_forward_query (GdmIndirectDisplay *id,
struct sockaddr_in *clnt_sa,
struct in_addr *display_addr,
ARRAYofARRAY8Ptr authlist);
static void gdm_xdmcp_whack_queued_managed_forwards (struct sockaddr_in *clnt_sa,
struct in_addr *origin);
static void gdm_xdmcp_send_got_managed_forward (struct sockaddr_in *clnt_sa,
struct in_addr *origin);
static GdmDisplay *gdm_xdmcp_display_lookup (CARD32 sessid);
static void gdm_xdmcp_display_dispose_check (const gchar *hostname, int dspnum);
static void gdm_xdmcp_displays_check (void);
static void gdm_forward_query_dispose (GdmForwardQuery *q);
static GSList *forward_queries = NULL;
typedef struct {
int times;
guint handler;
#ifdef ENABLE_IPV6
struct sockaddr_storage manager;
struct sockaddr_storage origin;
#else
struct sockaddr_in manager;
struct sockaddr_in origin;
#endif
} ManagedForward;
#define MANAGED_FORWARD_INTERVAL 1500 /* 1.5 seconds */
static GSList *managed_forwards = NULL;
/*
* We don't support XDM-AUTHENTICATION-1 and XDM-AUTHORIZATION-1.
*
* The latter would be quite useful to avoid sending unencrypted
* cookies over the wire. Unfortunately it isn't supported without
* XDM-AUTHENTICATION-1 which requires a key database with private
* keys from all X terminals on your LAN. Fun, fun, fun.
*
* Furthermore user passwords go over the wire in cleartext anyway so
* protecting cookies is not that important.
*/
typedef struct _XdmAuth {
ARRAY8 authentication;
ARRAY8 authorization;
} XdmAuthRec, *XdmAuthPtr;
static XdmAuthRec serv_authlist = {
{ (CARD16) 0, (CARD8 *) 0 },
{ (CARD16) 0, (CARD8 *) 0 }
};
#ifdef ENABLE_IPV6
static gboolean have_ipv6 (void)
{
int s;
s = socket (AF_INET6, SOCK_STREAM, 0);
if (s != -1) {
VE_IGNORE_EINTR (close (s));
return TRUE;
}
return FALSE;
}
#endif
static int
#ifdef ENABLE_IPV6
gdm_xdmcp_displays_from_host (struct sockaddr_storage *addr)
#else
gdm_xdmcp_displays_from_host (struct sockaddr_in *addr)
#endif
{
GSList *li;
int count = 0;
for (li = displays; li != NULL; li = li->next) {
GdmDisplay *disp = li->data;
if (SERVER_IS_XDMCP (disp)) {
#ifdef ENABLE_IPV6
if (disp->addrtype == AF_INET6 &&
memcmp (&disp->addr6, &((struct sockaddr_in6 *)addr)->sin6_addr, sizeof (struct in6_addr)) == 0)
count++;
else
#endif
if (disp->addrtype == AF_INET &&
memcmp (&disp->addr, &((struct sockaddr_in *)addr)->sin_addr, sizeof (struct in_addr)) == 0)
count++;
}
}
return count;
}
static GdmDisplay *
#ifdef ENABLE_IPV6
gdm_xdmcp_display_lookup_by_host (struct sockaddr_storage *addr, int dspnum)
#else
gdm_xdmcp_display_lookup_by_host (struct sockaddr_in *addr, int dspnum)
#endif
{
GSList *li;
for (li = displays; li != NULL; li = li->next) {
GdmDisplay *disp = li->data;
if (SERVER_IS_XDMCP (disp)) {
#ifdef ENABLE_IPV6
if (disp->addrtype == AF_INET6) {
if ((memcmp (&disp->addr6, &((struct sockaddr_in6 *)addr)->sin6_addr, sizeof (struct in6_addr)) == 0) && disp->xdmcp_dispnum == dspnum)
return disp;
}
else
#endif
if ((memcmp (&disp->addr, &((struct sockaddr_in *)addr)->sin_addr, sizeof (struct in_addr)) == 0) && disp->xdmcp_dispnum == dspnum)
return disp;
}
}
return NULL;
}
gboolean
gdm_xdmcp_init (void)
{
#ifdef ENABLE_IPV6
struct sockaddr_storage serv_sa = {0};
#else
struct sockaddr_in serv_sa = {0};
#endif
gint addrlen;
gchar hostbuf[1024];
struct utsname name;
int udpport = gdm_get_value_int (GDM_KEY_UDP_PORT);
if ( ! gdm_get_value_bool (GDM_KEY_XDMCP))
return TRUE;
globsessid = g_random_int ();
/* Fetch and store local hostname in XDMCP friendly format */
hostbuf[1023] = '\0';
if G_UNLIKELY (gethostname (hostbuf, 1023) != 0) {
gdm_error (_("%s: Could not get server hostname: %s!"),
"gdm_xdmcp_init", strerror (errno));
strcmp (hostbuf, "localhost.localdomain");
}
if ( ! initted) {
uname (&name);
sysid = g_strconcat (name.sysname, " ", name.release, NULL);
servhost.data = (CARD8 *) g_strdup (hostbuf);
servhost.length = strlen ((char *) servhost.data);
initted = TRUE;
}
gdm_debug ("XDMCP: Start up on host %s, port %d", hostbuf, udpport);
/* Open socket for communications */
#ifdef ENABLE_IPV6
gdm_xdmcpfd = socket (AF_INET6, SOCK_DGRAM, 0); /* UDP */
if (gdm_xdmcpfd < 0)
#endif
gdm_xdmcpfd = socket (AF_INET, SOCK_DGRAM, 0); /* UDP */
if G_UNLIKELY (gdm_xdmcpfd < 0) {
gdm_error (_("%s: Could not create socket!"), "gdm_xdmcp_init");
gdm_set_value_bool (GDM_KEY_XDMCP, FALSE);
return FALSE;
}
#ifdef ENABLE_IPV6
if (have_ipv6 ()) {
((struct sockaddr_in6 *)(&serv_sa))->sin6_family = AF_INET6;
((struct sockaddr_in6 *)(&serv_sa))->sin6_port = htons (udpport); /* UDP 177 */
((struct sockaddr_in6 *)(&serv_sa))->sin6_addr = in6addr_any;
addrlen = sizeof (struct sockaddr_in6);
/* Checking and Setting Multicast options */
if (gdm_get_value_bool (GDM_KEY_MULTICAST)) {
int socktemp; /* temporary socket for getting info about available interfaces*/
int i, num;
char *buf;
struct ipv6_mreq mreq;
/* For interfaces' list */
struct ifconf ifc;
struct ifreq *ifr;
/* Extract Multicast address for IPv6 */
if (ve_string_empty (gdm_get_value_string (GDM_KEY_MULTICAST_ADDR))) {
/* Stuff it with all-node multicast address */
gdm_set_value_string (GDM_KEY_MULTICAST_ADDR, XDMCP_MULTICAST_ADDRESS);
}
socktemp = socket (AF_INET, SOCK_DGRAM, 0);
#ifdef SIOCGIFNUM
if (ioctl (socktemp, SIOCGIFNUM, &num) < 0) {
num = 64;
}
#else
num = 64;
#endif
ifc.ifc_len = sizeof (struct ifreq) * num;
ifc.ifc_buf = buf = malloc (ifc.ifc_len);
if (ioctl (socktemp, SIOCGIFCONF, &ifc) >= 0) {
ifr = ifc.ifc_req;
num = ifc.ifc_len / sizeof (struct ifreq); /* No of interfaces */
/* Joining multicast group with all interfaces*/
for (i = 0 ; i < num ; i++) {
struct ifreq ifreq;
int ifindex;
memset (&ifreq, 0, sizeof (ifreq));
strncpy (ifreq.ifr_name, ifr[i].ifr_name, sizeof (ifreq.ifr_name));
/* paranoia */
ifreq.ifr_name[sizeof (ifreq.ifr_name) - 1] = '\0';
if (ioctl (socktemp, SIOCGIFFLAGS, &ifreq) < 0)
gdm_debug ("XDMCP: Could not get SIOCGIFFLAGS for %s", ifr[i].ifr_name);
ifindex = if_nametoindex (ifr[i].ifr_name);
if ((!(ifreq.ifr_flags & IFF_UP) ||
(ifreq.ifr_flags & IFF_LOOPBACK)) ||
((ifindex == 0 ) && (errno == ENXIO))) {
/* Not a valid interface or loopback interface*/
continue;
}
mreq.ipv6mr_interface = ifindex;
inet_pton (AF_INET6, gdm_get_value_string (GDM_KEY_MULTICAST_ADDR), &mreq.ipv6mr_multiaddr);
setsockopt (gdm_xdmcpfd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mreq, sizeof (mreq));
}
}
g_free (buf);
close (socktemp);
}
}
else
#endif
{
((struct sockaddr_in *)(&serv_sa))->sin_family = AF_INET;
((struct sockaddr_in *)(&serv_sa))->sin_port = htons (udpport); /* UDP 177 */
((struct sockaddr_in *)(&serv_sa))->sin_addr.s_addr = htonl (INADDR_ANY);
addrlen = sizeof (struct sockaddr_in);
}
if G_UNLIKELY (bind (gdm_xdmcpfd, (struct sockaddr*) &serv_sa, addrlen) == -1) {
gdm_error (_("%s: Could not bind to XDMCP socket!"), "gdm_xdmcp_init");
gdm_xdmcp_close ();
gdm_set_value_bool (GDM_KEY_XDMCP, FALSE);
return FALSE;
}
return TRUE;
}
void
gdm_xdmcp_run (void)
{
GIOChannel *xdmcpchan;
xdmcpchan = g_io_channel_unix_new (gdm_xdmcpfd);
g_io_channel_set_encoding (xdmcpchan, NULL, NULL);
g_io_channel_set_buffered (xdmcpchan, FALSE);
xdmcp_source = g_io_add_watch_full
(xdmcpchan, G_PRIORITY_DEFAULT,
G_IO_IN|G_IO_PRI|G_IO_ERR|G_IO_HUP|G_IO_NVAL,
gdm_xdmcp_decode_packet, NULL, NULL);
g_io_channel_unref (xdmcpchan);
}
void
gdm_xdmcp_close (void)
{
if (xdmcp_source > 0) {
g_source_remove (xdmcp_source);
xdmcp_source = 0;
}
if (gdm_xdmcpfd > 0) {
VE_IGNORE_EINTR (close (gdm_xdmcpfd));
gdm_xdmcpfd = -1;
}
}
static gboolean
gdm_xdmcp_decode_packet (GIOChannel *source, GIOCondition cond, gpointer data)
{
#ifdef ENABLE_IPV6
struct sockaddr_storage clnt_sa;
#else
struct sockaddr_in clnt_sa;
#endif
gint sa_len = sizeof (clnt_sa);
XdmcpHeader header;
static const char * const opcode_names[] = {
NULL,
"BROADCAST_QUERY", "QUERY", "INDIRECT_QUERY", "FORWARD_QUERY",
"WILLING", "UNWILLING", "REQUEST", "ACCEPT", "DECLINE", "MANAGE", "REFUSE",
"FAILED", "KEEPALIVE", "ALIVE"
};
static const char * const gdm_opcode_names[] = {
"MANAGED_FORWARD", "GOT_MANAGED_FORWARD"
};
/* packets come at somewhat random times */
gdm_random_tick ();
if (cond != G_IO_IN)
gdm_debug ("gdm_xdmcp_decode_packet: GIOCondition %d", (int)cond);
if ( ! (cond & G_IO_IN))
return TRUE;
if G_UNLIKELY (!XdmcpFill (gdm_xdmcpfd, &buf, (XdmcpNetaddr)&clnt_sa, &sa_len)) {
gdm_debug (_("%s: Could not create XDMCP buffer!"),
"gdm_xdmcp_decode_packet");
return TRUE;
}
if G_UNLIKELY (!XdmcpReadHeader (&buf, &header)) {
gdm_error (_("%s: Could not read XDMCP header!"),
"gdm_xdmcp_decode_packet");
return TRUE;
}
if G_UNLIKELY (header.version != XDM_PROTOCOL_VERSION &&
header.version != GDM_XDMCP_PROTOCOL_VERSION) {
gdm_error (_("%s: Incorrect XDMCP version!"),
"gdm_xdmcp_decode_packet");
return TRUE;
}
if (header.opcode <= ALIVE) {
#ifdef ENABLE_IPV6
if (clnt_sa.ss_family == AF_INET6) {
char buffer6[INET6_ADDRSTRLEN];
gdm_debug ("gdm_xdmcp_decode: Received opcode %s from client %s", opcode_names[header.opcode], inet_ntop (AF_INET6, &((struct sockaddr_in6 *)(&clnt_sa))->sin6_addr, buffer6, INET6_ADDRSTRLEN));
}
else
#endif
{
gdm_debug ("gdm_xdmcp_decode: Received opcode %s from client %s", opcode_names[header.opcode], inet_ntoa (((struct sockaddr_in *)(&clnt_sa))->sin_addr));
}
}
if (header.opcode >= GDM_XDMCP_FIRST_OPCODE &&
header.opcode < GDM_XDMCP_LAST_OPCODE) {
#ifdef ENABLE_IPV6
if (clnt_sa.ss_family == AF_INET6) {
char buffer6[INET6_ADDRSTRLEN];
gdm_debug ("gdm_xdmcp_decode: Received opcode %s from client %s", gdm_opcode_names[header.opcode - GDM_XDMCP_FIRST_OPCODE], inet_ntop (AF_INET6, &((struct sockaddr_in6 *)(&clnt_sa))->sin6_addr, buffer6, INET6_ADDRSTRLEN));
}
else
#endif
{
char buffer[INET_ADDRSTRLEN];
gdm_debug ("gdm_xdmcp_decode: Received opcode %s from client %s", gdm_opcode_names[header.opcode - GDM_XDMCP_FIRST_OPCODE], inet_ntop (AF_INET, &((struct sockaddr_in *)(&clnt_sa))->sin_addr, buffer, INET_ADDRSTRLEN));
}
}
switch (header.opcode) {
case BROADCAST_QUERY:
gdm_xdmcp_handle_query (&clnt_sa, header.length, BROADCAST_QUERY);
break;
case QUERY:
gdm_xdmcp_handle_query (&clnt_sa, header.length, QUERY);
break;
case INDIRECT_QUERY:
gdm_xdmcp_handle_query (&clnt_sa, header.length, INDIRECT_QUERY);
break;
case FORWARD_QUERY:
gdm_xdmcp_handle_forward_query (&clnt_sa, header.length);
break;
case REQUEST:
gdm_xdmcp_handle_request (&clnt_sa, header.length);
break;
case MANAGE:
gdm_xdmcp_handle_manage (&clnt_sa, header.length);
break;
case KEEPALIVE:
gdm_xdmcp_handle_keepalive (&clnt_sa, header.length);
break;
case GDM_XDMCP_MANAGED_FORWARD:
gdm_xdmcp_handle_managed_forward (&clnt_sa, header.length);
break;
case GDM_XDMCP_GOT_MANAGED_FORWARD:
gdm_xdmcp_handle_got_managed_forward (&clnt_sa, header.length);
break;
default:
#ifdef ENABLE_IPV6
if (clnt_sa.ss_family == AF_INET6) {
char buffer6[INET6_ADDRSTRLEN];
gdm_error (_("%s: Unknown opcode from host %s"),
"gdm_xdmcp_decode_packet",
inet_ntop (AF_INET6, &(((struct sockaddr_in6 *)(&clnt_sa))->sin6_addr), buffer6, INET6_ADDRSTRLEN));
}
else
#endif
{
gdm_error (_("%s: Unknown opcode from host %s"),
"gdm_xdmcp_decode_packet",
inet_ntoa (((struct sockaddr_in *)(&clnt_sa))->sin_addr));
}
break;
}
return TRUE;
}
static void
#ifdef ENABLE_IPV6
gdm_xdmcp_handle_query (struct sockaddr_storage *clnt_sa, gint len, gint type)
#else
gdm_xdmcp_handle_query (struct sockaddr_in *clnt_sa, gint len, gint type)
#endif
{
ARRAYofARRAY8 clnt_authlist;
gint i = 0, explen = 1;
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
char buffer6[INET6_ADDRSTRLEN];
gdm_debug ("gdm_xdmcp_handle_query: Opcode %d from %s", type, inet_ntop (AF_INET6, &((struct sockaddr_in6 *)(clnt_sa))->sin6_addr, buffer6, INET6_ADDRSTRLEN));
}
else
#endif
{
gdm_debug ("gdm_xdmcp_handle_query: Opcode %d from %s", type, inet_ntoa (((struct sockaddr_in *)(clnt_sa))->sin_addr));
}
/* Extract array of authentication names from Xdmcp packet */
if G_UNLIKELY (! XdmcpReadARRAYofARRAY8 (&buf, &clnt_authlist)) {
gdm_error (_("%s: Could not extract authlist from packet"),
"gdm_xdmcp_handle_query");
return;
}
/* Crude checksumming */
for (i = 0 ; i < clnt_authlist.length ; i++) {
if G_UNLIKELY (gdm_get_value_bool (GDM_KEY_DEBUG)) {
char *s = g_strndup ((char *) clnt_authlist.data[i].data, clnt_authlist.length);
gdm_debug ("gdm_xdmcp_handle_query: authlist: %s", ve_sure_string (s));
g_free (s);
}
explen += 2+clnt_authlist.data[i].length;
}
if G_UNLIKELY (len != explen) {
gdm_error (_("%s: Error in checksum"),
"gdm_xdmcp_handle_query");
XdmcpDisposeARRAYofARRAY8 (&clnt_authlist);
return;
}
/* Check with tcp_wrappers if client is allowed to access */
if (gdm_xdmcp_host_allow (clnt_sa)) {
/* If this is an INDIRECT_QUERY, try to look up the display in
* the pending list. If found send a FORWARD_QUERY to the
* chosen manager. Otherwise alloc a new indirect display. */
if (gdm_get_value_bool (GDM_KEY_INDIRECT) &&
type == INDIRECT_QUERY) {
GdmIndirectDisplay *id = gdm_choose_indirect_lookup (clnt_sa);
if (id != NULL && (
#ifdef ENABLE_IPV6
(id->chosen_host6 != NULL) ||
#endif
(id->chosen_host != NULL)))
{
/* if user chose us, then just send willing */
if ((((struct sockaddr_in *)clnt_sa)->sin_family == AF_INET && gdm_is_local_addr ((struct in_addr *)(id->chosen_host)))
#ifdef ENABLE_IPV6
|| (clnt_sa->ss_family == AF_INET6 && gdm_is_local_addr6 ((struct in6_addr *)(id->chosen_host6)))
#endif
) {
/* get rid of indirect, so that we don't get
* the chooser */
gdm_choose_indirect_dispose (id);
gdm_xdmcp_send_willing (clnt_sa);
}
else
if ((((struct sockaddr_in *)clnt_sa)->sin_family == AF_INET && gdm_is_loopback_addr (&(((struct sockaddr_in *)clnt_sa)->sin_addr)))
#ifdef ENABLE_IPV6
|| (clnt_sa->ss_family == AF_INET6 && gdm_is_loopback_addr6 (&(((struct sockaddr_in6 *)clnt_sa)->sin6_addr)))
#endif
) {
/* woohoo! fun, I have no clue how to get
* the correct ip, SO I just send forward
* queries with all the different IPs */
const GList *list = gdm_peek_local_address_list ();
while (list != NULL) {
struct sockaddr *saddr = (struct sockaddr *)(list->data);
#ifdef ENABLE_IPV6
struct in6_addr *addr6;
#endif
struct in_addr *addr;
#ifdef ENABLE_IPV6
if (saddr->sa_family == AF_INET6) {
addr6 = &(((struct sockaddr_in6 *)saddr)->sin6_addr);
if ( ! gdm_is_loopback_addr6 (addr6)) {
/* forward query to * chosen host */
gdm_xdmcp_send_forward_query6 (id, (struct sockaddr_in6 *)clnt_sa, addr6, &clnt_authlist);
}
}
else
#endif
{
addr = &(((struct sockaddr_in *)saddr)->sin_addr);
if ( ! gdm_is_loopback_addr (addr)) {
/* forward query to * chosen host */
gdm_xdmcp_send_forward_query (id, (struct sockaddr_in *)clnt_sa, addr, &clnt_authlist);
}
}
list = list->next;
}
} else {
/* or send forward query to chosen host */
gdm_xdmcp_send_forward_query
(id, (struct sockaddr_in *)clnt_sa,
&(((struct sockaddr_in *)clnt_sa)->sin_addr),
&clnt_authlist);
}
} else if (id == NULL) {
id = gdm_choose_indirect_alloc (clnt_sa);
if (id != NULL) {
gdm_xdmcp_send_willing (clnt_sa);
}
} else {
gdm_xdmcp_send_willing (clnt_sa);
}
} else {
gdm_xdmcp_send_willing (clnt_sa);
}
} else if (type == QUERY) {
/* unwilling is ONLY sent for direct queries, never for broadcast
* nor indirects */
gdm_xdmcp_send_unwilling (clnt_sa, type);
}
/* Dispose authlist from remote display */
XdmcpDisposeARRAYofARRAY8 (&clnt_authlist);
}
#ifdef ENABLE_IPV6
static void
gdm_xdmcp_send_forward_query6 (GdmIndirectDisplay *id, struct sockaddr_in6 *clnt_sa, struct in6_addr *display_addr, ARRAYofARRAY8Ptr authlist)
{
struct sockaddr_in6 sock = {0};
XdmcpHeader header;
int i, authlen;
ARRAY8 address;
ARRAY8 port;
char buffer6[INET6_ADDRSTRLEN];
g_assert (id != NULL);
g_assert (id->chosen_host != NULL);
gdm_debug ("gdm_xdmcp_send_forward_query6: Sending forward query to %s", inet_ntop (AF_INET6, &(id->chosen_host6), buffer6, sizeof (buffer6)));
gdm_debug ("gdm_xdmcp_send_forward_query6: Query contains %s:%d", inet_ntop (AF_INET6, display_addr, buffer6, sizeof (buffer6)), (int) ntohs (clnt_sa->sin6_port));
authlen = 1;
for (i = 0 ; i < authlist->length ; i++) {
authlen += 2 + authlist->data[i].length;
}
/* we depend on this being 2 elsewhere as well */
port.length = 2;
port.data = g_new (char, 2);
memcpy (port.data, &(clnt_sa->sin6_port), 2);
address.length = sizeof (struct in6_addr);
address.data = (void *)g_new (struct in6_addr, 1);
memcpy (address.data, display_addr, sizeof (struct in6_addr));
header.opcode = (CARD16) FORWARD_QUERY;
header.length = authlen;
header.length += 2 + address.length;
header.length += 2 + port.length;
header.version = XDM_PROTOCOL_VERSION;
XdmcpWriteHeader (&buf, &header);
XdmcpWriteARRAY8 (&buf, &address);
XdmcpWriteARRAY8 (&buf, &port);
XdmcpWriteARRAYofARRAY8 (&buf, authlist);
memset (&sock, 0, sizeof (sock));
sock.sin6_family = AF_INET6;
sock.sin6_port = htons (XDM_UDP_PORT);
memcpy (sock.sin6_addr.s6_addr, id->chosen_host6->s6_addr, sizeof (struct in6_addr));
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr) &sock, (int)sizeof (struct sockaddr_in6));
g_free (port.data);
g_free (address.data);
}
#endif
static void
gdm_xdmcp_send_forward_query (GdmIndirectDisplay *id,
struct sockaddr_in *clnt_sa,
struct in_addr *display_addr,
ARRAYofARRAY8Ptr authlist)
{
struct sockaddr_in sock = {0};
XdmcpHeader header;
int i, authlen;
ARRAY8 address;
ARRAY8 port;
gdm_assert (id != NULL);
gdm_assert (id->chosen_host != NULL);
gdm_debug ("gdm_xdmcp_send_forward_query: Sending forward query to %s",
inet_ntoa (*id->chosen_host));
gdm_debug ("gdm_xdmcp_send_forward_query: Query contains %s:%d",
inet_ntoa (*display_addr),
(int) ntohs (clnt_sa->sin_port));
authlen = 1;
for (i = 0 ; i < authlist->length ; i++) {
authlen += 2 + authlist->data[i].length;
}
/* we depend on this being 2 elsewhere as well */
port.length = 2;
port.data = (CARD8 *) g_new (char, 2);
memcpy (port.data, &(clnt_sa->sin_port), 2);
address.length = sizeof (struct in_addr);
address.data = (void *)g_new (struct in_addr, 1);
memcpy (address.data, display_addr, sizeof (struct in_addr));
header.opcode = (CARD16) FORWARD_QUERY;
header.length = authlen;
header.length += 2 + address.length;
header.length += 2 + port.length;
header.version = XDM_PROTOCOL_VERSION;
XdmcpWriteHeader (&buf, &header);
XdmcpWriteARRAY8 (&buf, &address);
XdmcpWriteARRAY8 (&buf, &port);
XdmcpWriteARRAYofARRAY8 (&buf, authlist);
sock.sin_family = AF_INET;
sock.sin_port = htons (XDM_UDP_PORT);
sock.sin_addr.s_addr = id->chosen_host->s_addr;
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr) &sock,
(int)sizeof (struct sockaddr_in));
g_free (port.data);
g_free (address.data);
}
static gboolean
remove_oldest_forward (void)
{
GSList *li;
GdmForwardQuery *oldest = NULL;
for (li = forward_queries; li != NULL; li = li->next) {
GdmForwardQuery *query = li->data;
if (oldest == NULL ||
query->acctime < oldest->acctime) {
oldest = query;
}
}
if (oldest != NULL) {
gdm_forward_query_dispose (oldest);
return TRUE;
} else {
return FALSE;
}
}
static GdmForwardQuery *
#ifdef ENABLE_IPV6
gdm_forward_query_alloc (struct sockaddr_storage *mgr_sa,
struct sockaddr_storage *dsp_sa)
#else
gdm_forward_query_alloc (struct sockaddr_in *mgr_sa,
struct sockaddr_in *dsp_sa)
#endif
{
GdmForwardQuery *q;
int count;
count = g_slist_length (forward_queries);
while (count > GDM_MAX_FORWARD_QUERIES &&
remove_oldest_forward ())
count --;
q = g_new0 (GdmForwardQuery, 1);
#ifdef ENABLE_IPV6
q->dsp_sa = g_new0 (struct sockaddr_storage, 1);
memcpy (q->dsp_sa, dsp_sa, sizeof (struct sockaddr_storage));
q->from_sa = g_new0 (struct sockaddr_storage, 1);
memcpy (q->from_sa, mgr_sa, sizeof (struct sockaddr_storage));
#else
q->dsp_sa = g_new0 (struct sockaddr_in, 1);
memcpy (q->dsp_sa, dsp_sa, sizeof (struct sockaddr_in));
q->from_sa = g_new0 (struct sockaddr_in, 1);
memcpy (q->from_sa, mgr_sa, sizeof (struct sockaddr_in));
#endif
forward_queries = g_slist_prepend (forward_queries, q);
return q;
}
static GdmForwardQuery *
#ifdef ENABLE_IPV6
gdm_forward_query_lookup (struct sockaddr_storage *clnt_sa)
#else
gdm_forward_query_lookup (struct sockaddr_in *clnt_sa)
#endif
{
GSList *li, *qlist;
GdmForwardQuery *q;
time_t curtime = time (NULL);
qlist = g_slist_copy (forward_queries);
for (li = qlist; li != NULL; li = li->next) {
q = (GdmForwardQuery *) li->data;
if (q == NULL)
continue;
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
if (memcmp (((struct sockaddr_in6 *)(q->dsp_sa))->sin6_addr.s6_addr, ((struct sockaddr_in6 *)clnt_sa)->sin6_addr.s6_addr, sizeof (struct in6_addr)) == 0) {
g_slist_free (qlist);
return q;
}
if (q->acctime > 0 && curtime > q->acctime + GDM_FORWARD_QUERY_TIMEOUT) {
char buffer6[INET6_ADDRSTRLEN];
gdm_debug ("gdm_forward_query_lookup: Disposing stale forward query from %s", inet_ntop (AF_INET6, &((struct sockaddr_in6 *)q->dsp_sa)->sin6_addr, buffer6, INET6_ADDRSTRLEN));
gdm_forward_query_dispose (q);
continue;
}
}
else
#endif
{
if (((struct sockaddr_in *)(q->dsp_sa))->sin_addr.s_addr == ((struct sockaddr_in *)clnt_sa)->sin_addr.s_addr) {
g_slist_free (qlist);
return q;
}
if (q->acctime > 0 &&
curtime > q->acctime + GDM_FORWARD_QUERY_TIMEOUT) {
gdm_debug ("gdm_forward_query_lookup: Disposing stale forward query from %s",
inet_ntoa (((struct sockaddr_in*)q->dsp_sa)->sin_addr));
gdm_forward_query_dispose (q);
continue;
}
}
}
g_slist_free (qlist);
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
char buffer6[INET6_ADDRSTRLEN];
gdm_debug ("gdm_forward_query_lookup: Host %s not found", inet_ntop (AF_INET6, &((struct sockaddr_in6 *)clnt_sa)->sin6_addr, buffer6, INET6_ADDRSTRLEN));
}
else
#endif
{
gdm_debug ("gdm_forward_query_lookup: Host %s not found",
inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
}
return NULL;
}
static void
gdm_forward_query_dispose (GdmForwardQuery *q)
{
if (q == NULL)
return;
forward_queries = g_slist_remove (forward_queries, q);
q->acctime = 0;
#ifdef ENABLE_IPV6
if (q->dsp_sa->ss_family == AF_INET6) {
char buffer6[INET6_ADDRSTRLEN];
gdm_debug ("gdm_forward_query_dispose: Disposing %s", inet_ntop (AF_INET6, &(((struct sockaddr_in6 *)(q->dsp_sa))->sin6_addr), buffer6, INET6_ADDRSTRLEN));
}
else
#endif
{
gdm_debug ("gdm_forward_query_dispose: Disposing %s",
inet_ntoa (((struct sockaddr_in *)(q->dsp_sa))->sin_addr));
}
g_free (q->dsp_sa);
q->dsp_sa = NULL;
g_free (q->from_sa);
q->from_sa = NULL;
g_free (q);
}
static void
#ifdef ENABLE_IPV6
gdm_xdmcp_handle_forward_query (struct sockaddr_storage *clnt_sa, gint len)
#else
gdm_xdmcp_handle_forward_query (struct sockaddr_in *clnt_sa, gint len)
#endif
{
ARRAY8 clnt_addr;
ARRAY8 clnt_port;
ARRAYofARRAY8 clnt_authlist;
gint i = 0, explen = 1;
#ifdef ENABLE_IPV6
struct sockaddr_storage disp_sa = {0};
#else
struct sockaddr_in disp_sa = {0};
#endif
/* Check with tcp_wrappers if client is allowed to access */
if (! gdm_xdmcp_host_allow (clnt_sa)) {
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
char buffer6[INET6_ADDRSTRLEN];
gdm_error ("%s: Got FORWARD_QUERY from banned host %s",
"gdm_xdmcp_handle_forward query",
inet_ntop (AF_INET6, &(((struct sockaddr_in6 *)clnt_sa)->sin6_addr), buffer6, INET6_ADDRSTRLEN));
}
else
#endif
{
gdm_error ("%s: Got FORWARD_QUERY from banned host %s",
"gdm_xdmcp_handle_forward query",
inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
}
return;
}
/* Read display address */
if G_UNLIKELY (! XdmcpReadARRAY8 (&buf, &clnt_addr)) {
gdm_error (_("%s: Could not read display address"),
"gdm_xdmcp_handle_forward_query");
return;
}
/* Read display port */
if G_UNLIKELY (! XdmcpReadARRAY8 (&buf, &clnt_port)) {
XdmcpDisposeARRAY8 (&clnt_addr);
gdm_error (_("%s: Could not read display port number"),
"gdm_xdmcp_handle_forward_query");
return;
}
/* Extract array of authentication names from Xdmcp packet */
if G_UNLIKELY (! XdmcpReadARRAYofARRAY8 (&buf, &clnt_authlist)) {
XdmcpDisposeARRAY8 (&clnt_addr);
XdmcpDisposeARRAY8 (&clnt_port);
gdm_error (_("%s: Could not extract authlist from packet"),
"gdm_xdmcp_handle_forward_query");
return;
}
/* Crude checksumming */
explen = 1;
explen += 2+clnt_addr.length;
explen += 2+clnt_port.length;
for (i = 0 ; i < clnt_authlist.length ; i++) {
if G_UNLIKELY (gdm_get_value_bool (GDM_KEY_DEBUG)) {
char *s = g_strndup ((char *) clnt_authlist.data[i].data, clnt_authlist.length);
gdm_debug ("gdm_xdmcp_handle_forward_query: authlist: %s", ve_sure_string (s));
g_free (s);
}
explen += 2+clnt_authlist.data[i].length;
}
if G_UNLIKELY (len != explen) {
gdm_error (_("%s: Error in checksum"),
"gdm_xdmcp_handle_forward_query");
goto out;
}
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
char buffer6[INET6_ADDRSTRLEN];
struct in6_addr ipv6_addr;
struct in6_addr * ipv6_addr_ptr = NULL;
if (clnt_port.length == 2 &&
clnt_addr.length == 4) {
char * ipv4_addr;
/* Convert IPv4 address to IPv6 if needed */
struct sockaddr_in tmp_disp_sa = {0};
((struct sockaddr_in *)(&tmp_disp_sa))->sin_family = AF_INET;
memcpy (&((struct sockaddr_in *)(&tmp_disp_sa))->sin_port, clnt_port.data, 2);
memcpy (&((struct sockaddr_in *)(&tmp_disp_sa))->sin_addr.s_addr, clnt_addr.data, 4);
ipv4_addr = inet_ntoa (((struct sockaddr_in *)(&tmp_disp_sa))->sin_addr);
strcpy (buffer6, "::ffff:");
strncat (buffer6, ipv4_addr, INET_ADDRSTRLEN);
inet_pton (AF_INET6, buffer6, &ipv6_addr);
ipv6_addr_ptr = &ipv6_addr;
} else if (clnt_port.length == 2 &&
clnt_addr.length == 16) {
ipv6_addr_ptr = (struct in6_addr *)clnt_addr.data;
} else {
gdm_error (_("%s: Bad address"),
"gdm_xdmcp_handle_forward_query");
goto out;
}
g_assert (16 == sizeof (struct in6_addr));
gdm_xdmcp_whack_queued_managed_forwards6 ((struct sockaddr_in6 *)clnt_sa, ipv6_addr_ptr);
((struct sockaddr_in6 *)(&disp_sa))->sin6_family = AF_INET6;
/* Find client port number */
memcpy (&((struct sockaddr_in6 *)(&disp_sa))->sin6_port, clnt_port.data, 2);
/* Find client address */
memcpy (&((struct sockaddr_in6 *)(&disp_sa))->sin6_addr.s6_addr, ipv6_addr_ptr, 16);
gdm_debug ("gdm_xdmcp_handle_forward_query: Got FORWARD_QUERY for display: %s, port %d", inet_ntop (AF_INET6, &((struct sockaddr_in6 *)(&disp_sa))->sin6_addr, buffer6, INET6_ADDRSTRLEN), ntohs (((struct sockaddr_in6 *)(&disp_sa))->sin6_port));
}
else
#endif
{
if (clnt_port.length != 2 ||
clnt_addr.length != 4) {
gdm_error (_("%s: Bad address"),
"gdm_xdmcp_handle_forward_query");
goto out;
}
g_assert (4 == sizeof (struct in_addr));
gdm_xdmcp_whack_queued_managed_forwards ((struct sockaddr_in *)clnt_sa, (struct in_addr *)clnt_addr.data);
((struct sockaddr_in *)(&disp_sa))->sin_family = AF_INET;
/* Find client port number */
memcpy (&((struct sockaddr_in *)(&disp_sa))->sin_port, clnt_port.data, 2);
/* Find client address */
memcpy (&((struct sockaddr_in *)(&disp_sa))->sin_addr.s_addr, clnt_addr.data, 4);
gdm_debug ("gdm_xdmcp_handle_forward_query: Got FORWARD_QUERY for display: %s, port %d", inet_ntoa (((struct sockaddr_in *)(&disp_sa))->sin_addr), ntohs (((struct sockaddr_in *)(&disp_sa))->sin_port));
}
/* Check with tcp_wrappers if display is allowed to access */
if (gdm_xdmcp_host_allow (&disp_sa)) {
GdmForwardQuery *q;
q = gdm_forward_query_lookup (&disp_sa);
if (q != NULL)
gdm_forward_query_dispose (q);
gdm_forward_query_alloc (clnt_sa, &disp_sa);
gdm_xdmcp_send_willing (&disp_sa);
}
out:
/* Cleanup */
XdmcpDisposeARRAYofARRAY8 (&clnt_authlist);
XdmcpDisposeARRAY8 (&clnt_port);
XdmcpDisposeARRAY8 (&clnt_addr);
}
static void
#ifdef ENABLE_IPV6
gdm_xdmcp_send_willing (struct sockaddr_storage *clnt_sa)
#else
gdm_xdmcp_send_willing (struct sockaddr_in *clnt_sa)
#endif
{
ARRAY8 status;
XdmcpHeader header;
static char *last_status = NULL;
static time_t last_willing = 0;
char *bin;
FILE *fd;
char *willing = gdm_get_value_string (GDM_KEY_WILLING);
int dispperhost = gdm_get_value_int (GDM_KEY_DISPLAYS_PER_HOST);
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
char buffer6[INET6_ADDRSTRLEN];
gdm_debug ("gdm_xdmcp_send_willing: Sending WILLING to %s", inet_ntop (AF_INET6, &(((struct sockaddr_in6 *)clnt_sa)->sin6_addr), buffer6, INET6_ADDRSTRLEN));
}
else
#endif
{
gdm_debug ("gdm_xdmcp_send_willing: Sending WILLING to %s", inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
}
if (last_willing == 0 ||
time (NULL) - 3 > last_willing) {
char statusBuf[256] = "";
bin = ve_first_word (willing);
if ( ! ve_string_empty (bin) &&
g_access (bin, X_OK) == 0 &&
(fd = popen (willing, "r")) != NULL) {
if (fgets (statusBuf, sizeof (statusBuf), fd) != NULL &&
! ve_string_empty (g_strstrip (statusBuf))) {
g_free (last_status);
last_status = g_strdup (statusBuf);
} else {
g_free (last_status);
last_status = g_strdup (sysid);
}
pclose (fd);
} else {
g_free (last_status);
last_status = g_strdup (sysid);
}
last_willing = time (NULL);
g_free (bin);
}
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
if ( ! gdm_is_local_addr6 (&(((struct sockaddr_in6 *)clnt_sa)->sin6_addr)) &&
gdm_xdmcp_displays_from_host (clnt_sa) >= dispperhost) {
/* Don't translate, this goes over the wire to servers where we
* don't know the charset or language, so it must be ascii */
status.data = (CARD8 *) g_strdup_printf ("%s (Server is busy)", last_status);
} else {
status.data = (CARD8 *) g_strdup (last_status);
}
}
else
#endif
{
if ( ! gdm_is_local_addr (&(((struct sockaddr_in *)clnt_sa)->sin_addr)) &&
gdm_xdmcp_displays_from_host (clnt_sa) >= dispperhost) {
/* Don't translate, this goes over the wire to servers where we
* don't know the charset or language, so it must be ascii */
status.data = (CARD8 *) g_strdup_printf ("%s (Server is busy)", last_status);
} else {
status.data = (CARD8 *) g_strdup (last_status);
}
}
status.length = strlen ((char *) status.data);
header.opcode = (CARD16) WILLING;
header.length = 6 + serv_authlist.authentication.length;
header.length += servhost.length + status.length;
header.version = XDM_PROTOCOL_VERSION;
XdmcpWriteHeader (&buf, &header);
XdmcpWriteARRAY8 (&buf, &serv_authlist.authentication); /* Hardcoded authentication */
XdmcpWriteARRAY8 (&buf, &servhost);
XdmcpWriteARRAY8 (&buf, &status);
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr)clnt_sa, (int)sizeof (struct sockaddr_in6));
}
else
#endif
{
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr)clnt_sa, (int)sizeof (struct sockaddr_in));
}
g_free (status.data);
}
static void
#ifdef ENABLE_IPV6
gdm_xdmcp_send_unwilling (struct sockaddr_storage *clnt_sa, gint type)
#else
gdm_xdmcp_send_unwilling (struct sockaddr_in *clnt_sa, gint type)
#endif
{
ARRAY8 status;
XdmcpHeader header;
static time_t last_time = 0;
/* only send at most one packet per second,
no harm done if we don't send it at all */
if (last_time + 1 >= time (NULL))
return;
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
char buffer6[INET6_ADDRSTRLEN];
gdm_debug ("gdm_xdmcp_send_unwilling: Sending UNWILLING to %s", inet_ntop (AF_INET6, &(((struct sockaddr_in6 *)clnt_sa)->sin6_addr), buffer6, INET6_ADDRSTRLEN));
gdm_error (_("Denied XDMCP query from host %s"), buffer6);
}
else
#endif
{
gdm_debug ("gdm_xdmcp_send_unwilling: Sending UNWILLING to %s", inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
gdm_error (_("Denied XDMCP query from host %s"), inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
}
/* Don't translate, this goes over the wire to servers where we
* don't know the charset or language, so it must be ascii */
status.data = (CARD8 *) "Display not authorized to connect";
status.length = strlen ((char *) status.data);
header.opcode = (CARD16) UNWILLING;
header.length = 4 + servhost.length + status.length;
header.version = XDM_PROTOCOL_VERSION;
XdmcpWriteHeader (&buf, &header);
XdmcpWriteARRAY8 (&buf, &servhost);
XdmcpWriteARRAY8 (&buf, &status);
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr)clnt_sa, (int)sizeof (struct sockaddr_in6));
}
else
#endif
{
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr)clnt_sa, (int)sizeof (struct sockaddr_in));
}
last_time = time (NULL);
}
static void
#ifdef ENABLE_IPV6
gdm_xdmcp_really_send_managed_forward (struct sockaddr_storage *clnt_sa,
struct sockaddr_storage *origin)
#else
gdm_xdmcp_really_send_managed_forward (struct sockaddr_in *clnt_sa,
struct sockaddr_in *origin)
#endif
{
ARRAY8 address;
XdmcpHeader header;
struct in_addr addr;
#ifdef ENABLE_IPV6
struct in6_addr addr6;
if (clnt_sa->ss_family == AF_INET6) {
char buffer6[INET6_ADDRSTRLEN];
gdm_debug ("gdm_xdmcp_really_send_managed_forward: "
"Sending MANAGED_FORWARD to %s",
inet_ntop (AF_INET6, &(((struct sockaddr_in6 *)clnt_sa)->sin6_addr), buffer6, INET6_ADDRSTRLEN));
address.length = sizeof (struct in6_addr);
address.data = (void *)&addr6;
memcpy (address.data, &(((struct sockaddr_in6 *)origin)->sin6_addr), sizeof (struct in6_addr));
}
else
#endif
{
gdm_debug ("gdm_xdmcp_really_send_managed_forward: "
"Sending MANAGED_FORWARD to %s",
inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
address.length = sizeof (struct in_addr);
address.data = (void *)&addr;
memcpy (address.data, &(((struct sockaddr_in *)origin)->sin_addr), sizeof (struct in_addr));
}
header.opcode = (CARD16) GDM_XDMCP_MANAGED_FORWARD;
header.length = 4 + address.length;
header.version = GDM_XDMCP_PROTOCOL_VERSION;
XdmcpWriteHeader (&buf, &header);
XdmcpWriteARRAY8 (&buf, &address);
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr)clnt_sa, (int)sizeof (struct sockaddr_in6));
}
else
#endif
{
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr)clnt_sa, (int)sizeof (struct sockaddr_in));
}
}
static gboolean
managed_forward_handler (gpointer data)
{
ManagedForward *mf = data;
if (gdm_xdmcpfd > 0)
gdm_xdmcp_really_send_managed_forward (&(mf->manager),
&(mf->origin));
mf->times++;
if (gdm_xdmcpfd <= 0 || mf->times >= 2) {
managed_forwards = g_slist_remove (managed_forwards, mf);
mf->handler = 0;
/* mf freed by glib */
return FALSE;
}
return TRUE;
}
static void
#ifdef ENABLE_IPV6
gdm_xdmcp_send_managed_forward (struct sockaddr_storage *clnt_sa,
struct sockaddr_storage *origin)
#else
gdm_xdmcp_send_managed_forward (struct sockaddr_in *clnt_sa,
struct sockaddr_in *origin)
#endif
{
ManagedForward *mf;
gdm_xdmcp_really_send_managed_forward (clnt_sa, origin);
mf = g_new0 (ManagedForward, 1);
mf->times = 0;
#ifdef ENABLE_IPV6
memcpy (&(mf->manager), clnt_sa, sizeof (struct sockaddr_storage));
memcpy (&(mf->origin), origin, sizeof (struct sockaddr_storage));
#else
memcpy (&(mf->manager), clnt_sa, sizeof (struct sockaddr_in));
memcpy (&(mf->origin), origin, sizeof (struct sockaddr_in));
#endif
mf->handler = g_timeout_add_full (G_PRIORITY_DEFAULT,
MANAGED_FORWARD_INTERVAL,
managed_forward_handler,
mf,
(GDestroyNotify) g_free);
managed_forwards = g_slist_prepend (managed_forwards, mf);
}
#ifdef ENABLE_IPV6
static void
gdm_xdmcp_send_got_managed_forward6 (struct sockaddr_in6 *clnt_sa,
struct in6_addr *origin)
{
ARRAY8 address;
XdmcpHeader header;
struct in6_addr addr;
char buffer6[INET6_ADDRSTRLEN];
gdm_debug ("gdm_xdmcp_send_managed_forward: "
"Sending GOT_MANAGED_FORWARD to %s",
inet_ntop (AF_INET6, &clnt_sa->sin6_addr, buffer6, INET6_ADDRSTRLEN));
address.length = sizeof (struct in6_addr);
address.data = (void *)&addr;
memcpy (address.data, origin, sizeof (struct in6_addr));
header.opcode = (CARD16) GDM_XDMCP_GOT_MANAGED_FORWARD;
header.length = 16 + address.length;
header.version = GDM_XDMCP_PROTOCOL_VERSION;
XdmcpWriteHeader (&buf, &header);
XdmcpWriteARRAY8 (&buf, &address);
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr)clnt_sa,
(int)sizeof (struct sockaddr_in6));
}
#endif
static void
gdm_xdmcp_send_got_managed_forward (struct sockaddr_in *clnt_sa,
struct in_addr *origin)
{
ARRAY8 address;
XdmcpHeader header;
struct in_addr addr;
gdm_debug ("gdm_xdmcp_send_managed_forward: "
"Sending GOT_MANAGED_FORWARD to %s",
inet_ntoa (clnt_sa->sin_addr));
address.length = sizeof (struct in_addr);
address.data = (void *)&addr;
memcpy (address.data, origin, sizeof (struct in_addr));
header.opcode = (CARD16) GDM_XDMCP_GOT_MANAGED_FORWARD;
header.length = 4 + address.length;
header.version = GDM_XDMCP_PROTOCOL_VERSION;
XdmcpWriteHeader (&buf, &header);
XdmcpWriteARRAY8 (&buf, &address);
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr)clnt_sa,
(int)sizeof (struct sockaddr_in));
}
static void
#ifdef ENABLE_IPV6
gdm_xdmcp_handle_request (struct sockaddr_storage *clnt_sa, gint len)
#else
gdm_xdmcp_handle_request (struct sockaddr_in *clnt_sa, gint len)
#endif
{
CARD16 clnt_dspnum;
ARRAY16 clnt_conntyp;
ARRAYofARRAY8 clnt_addr;
ARRAY8 clnt_authname;
ARRAY8 clnt_authdata;
ARRAYofARRAY8 clnt_authorization;
ARRAY8 clnt_manufacturer;
gint explen;
gint i;
gboolean mitauth = FALSE;
gboolean entered = FALSE;
int maxsessions = gdm_get_value_int (GDM_KEY_MAX_SESSIONS);
int maxpending = gdm_get_value_int (GDM_KEY_MAX_PENDING);
int dispperhost = gdm_get_value_int (GDM_KEY_DISPLAYS_PER_HOST);
#ifdef ENABLE_IPV6
char buffer6[INET6_ADDRSTRLEN];
inet_ntop (AF_INET6, &((struct sockaddr_in6 *)clnt_sa)->sin6_addr, buffer6, INET6_ADDRSTRLEN);
if (clnt_sa->ss_family == AF_INET6) {
gdm_debug ("gdm_xdmcp_handle_request: Got REQUEST from %s",buffer6);
}
else
#endif
{
gdm_debug ("gdm_xdmcp_handle_request: Got REQUEST from %s",
inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
}
/* Check with tcp_wrappers if client is allowed to access */
if (! gdm_xdmcp_host_allow (clnt_sa)) {
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
gdm_error (_("%s: Got REQUEST from banned host %s"),
"gdm_xdmcp_handle_request",
inet_ntop (AF_INET6, &((struct sockaddr_in6 *)clnt_sa)->sin6_addr, buffer6, INET6_ADDRSTRLEN));
}
else
#endif
{
gdm_error (_("%s: Got REQUEST from banned host %s"),
"gdm_xdmcp_handle_request",
inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
}
return;
}
gdm_xdmcp_displays_check (); /* Purge pending displays */
/* Remote display number */
if G_UNLIKELY (! XdmcpReadCARD16 (&buf, &clnt_dspnum)) {
gdm_error (_("%s: Could not read Display Number"),
"gdm_xdmcp_handle_request");
return;
}
/* We don't care about connection type. Address says it all */
if G_UNLIKELY (! XdmcpReadARRAY16 (&buf, &clnt_conntyp)) {
gdm_error (_("%s: Could not read Connection Type"),
"gdm_xdmcp_handle_request");
return;
}
/* This is TCP/IP - we don't care */
if G_UNLIKELY (! XdmcpReadARRAYofARRAY8 (&buf, &clnt_addr)) {
gdm_error (_("%s: Could not read Client Address"),
"gdm_xdmcp_handle_request");
XdmcpDisposeARRAY16 (&clnt_conntyp);
return;
}
/* Read authentication type */
if G_UNLIKELY (! XdmcpReadARRAY8 (&buf, &clnt_authname)) {
gdm_error (_("%s: Could not read Authentication Names"),
"gdm_xdmcp_handle_request");
XdmcpDisposeARRAYofARRAY8 (&clnt_addr);
XdmcpDisposeARRAY16 (&clnt_conntyp);
return;
}
/* Read authentication data */
if G_UNLIKELY (! XdmcpReadARRAY8 (&buf, &clnt_authdata)) {
gdm_error (_("%s: Could not read Authentication Data"),
"gdm_xdmcp_handle_request");
XdmcpDisposeARRAYofARRAY8 (&clnt_addr);
XdmcpDisposeARRAY16 (&clnt_conntyp);
XdmcpDisposeARRAY8 (&clnt_authname);
return;
}
/* Read and select from supported authorization list */
if G_UNLIKELY (! XdmcpReadARRAYofARRAY8 (&buf, &clnt_authorization)) {
gdm_error (_("%s: Could not read Authorization List"),
"gdm_xdmcp_handle_request");
XdmcpDisposeARRAY8 (&clnt_authdata);
XdmcpDisposeARRAYofARRAY8 (&clnt_addr);
XdmcpDisposeARRAY16 (&clnt_conntyp);
XdmcpDisposeARRAY8 (&clnt_authname);
return;
}
/* libXdmcp doesn't terminate strings properly so we cheat and use strncmp () */
for (i = 0 ; i < clnt_authorization.length ; i++)
if (clnt_authorization.data[i].length == 18 &&
strncmp ((char *) clnt_authorization.data[i].data, "MIT-MAGIC-COOKIE-1", 18) == 0)
mitauth = TRUE;
/* Manufacturer ID */
if G_UNLIKELY (! XdmcpReadARRAY8 (&buf, &clnt_manufacturer)) {
gdm_error (_("%s: Could not read Manufacturer ID"),
"gdm_xdmcp_handle_request");
XdmcpDisposeARRAY8 (&clnt_authname);
XdmcpDisposeARRAY8 (&clnt_authdata);
XdmcpDisposeARRAYofARRAY8 (&clnt_addr);
XdmcpDisposeARRAYofARRAY8 (&clnt_authorization);
XdmcpDisposeARRAY16 (&clnt_conntyp);
return;
}
/* Crude checksumming */
explen = 2; /* Display Number */
explen += 1+2*clnt_conntyp.length; /* Connection Type */
explen += 1; /* Connection Address */
for (i = 0 ; i < clnt_addr.length ; i++)
explen += 2+clnt_addr.data[i].length;
explen += 2+clnt_authname.length; /* Authentication Name */
explen += 2+clnt_authdata.length; /* Authentication Data */
explen += 1; /* Authorization Names */
for (i = 0 ; i < clnt_authorization.length ; i++)
explen += 2+clnt_authorization.data[i].length;
explen += 2+clnt_manufacturer.length;
if G_UNLIKELY (explen != len) {
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
gdm_error (_("%s: Failed checksum from %s"),
"gdm_xdmcp_handle_request",
inet_ntop (AF_INET6, &((struct sockaddr_in6 *)clnt_sa)->sin6_addr, buffer6, INET6_ADDRSTRLEN));
}
else
#endif
{
gdm_error (_("%s: Failed checksum from %s"),
"gdm_xdmcp_handle_request",
inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
}
XdmcpDisposeARRAY8 (&clnt_authname);
XdmcpDisposeARRAY8 (&clnt_authdata);
XdmcpDisposeARRAY8 (&clnt_manufacturer);
XdmcpDisposeARRAYofARRAY8 (&clnt_addr);
XdmcpDisposeARRAYofARRAY8 (&clnt_authorization);
XdmcpDisposeARRAY16 (&clnt_conntyp);
return;
}
if G_UNLIKELY (gdm_get_value_bool (GDM_KEY_DEBUG)) {
char *s = g_strndup ((char *) clnt_manufacturer.data, clnt_manufacturer.length);
gdm_debug ("gdm_xdmcp_handle_request: xdmcp_pending=%d, MaxPending=%d, xdmcp_sessions=%d, MaxSessions=%d, ManufacturerID=%s",
xdmcp_pending, maxpending, xdmcp_sessions, maxsessions, ve_sure_string (s));
g_free (s);
}
/* Check if ok to manage display */
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
if (mitauth &&
xdmcp_sessions < maxsessions &&
(gdm_is_local_addr6 (&((struct sockaddr_in6 *)clnt_sa)->sin6_addr) || gdm_xdmcp_displays_from_host (clnt_sa) < dispperhost))
entered = TRUE;
} else
#endif
{
if (mitauth &&
xdmcp_sessions < maxsessions &&
(gdm_is_local_addr (&(((struct sockaddr_in *)clnt_sa)->sin_addr)) ||
gdm_xdmcp_displays_from_host (clnt_sa) < dispperhost))
entered = TRUE;
}
if (entered) {
GdmHostent *he;
he = gdm_gethostbyaddr (clnt_sa);
/* Check if we are already talking to this host */
gdm_xdmcp_display_dispose_check (he->hostname, clnt_dspnum);
if (xdmcp_pending >= maxpending) {
gdm_debug ("gdm_xdmcp_handle_request: maximum pending");
/* Don't translate, this goes over the wire to servers where we
* don't know the charset or language, so it must be ascii */
gdm_xdmcp_send_decline (clnt_sa, "Maximum pending servers");
gdm_hostent_free (he);
} else {
/* the addrs are NOT copied */
gdm_xdmcp_send_accept (he /* eaten and freed */, clnt_sa, clnt_dspnum);
}
} else {
/* Don't translate, this goes over the wire to servers where we
* don't know the charset or language, so it must be ascii */
if ( ! mitauth) {
gdm_xdmcp_send_decline (clnt_sa, "Only MIT-MAGIC-COOKIE-1 supported");
} else if (xdmcp_sessions >= maxsessions) {
gdm_info ("Maximum number of open XDMCP sessions reached");
gdm_xdmcp_send_decline (clnt_sa, "Maximum number of open sessions reached");
} else {
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6)
gdm_info ("Maximum number of open XDMCP sessions from host %s reached", buffer6);
else
#endif
gdm_info ("Maximum number of open XDMCP sessions from host %s reached",
inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
gdm_xdmcp_send_decline (clnt_sa, "Maximum number of open sessions from your host reached");
}
}
XdmcpDisposeARRAY8 (&clnt_authname);
XdmcpDisposeARRAY8 (&clnt_authdata);
XdmcpDisposeARRAY8 (&clnt_manufacturer);
XdmcpDisposeARRAYofARRAY8 (&clnt_addr);
XdmcpDisposeARRAYofARRAY8 (&clnt_authorization);
XdmcpDisposeARRAY16 (&clnt_conntyp);
}
static void
gdm_xdmcp_send_accept (GdmHostent *he /* eaten and freed */,
#ifdef ENABLE_IPV6
struct sockaddr_storage *clnt_sa,
#else
struct sockaddr_in *clnt_sa,
#endif
gint displaynum)
{
XdmcpHeader header;
ARRAY8 authentype;
ARRAY8 authendata;
ARRAY8 authname;
ARRAY8 authdata;
GdmDisplay *d;
d = gdm_xdmcp_display_alloc (clnt_sa,
he /* eaten and freed */,
displaynum);
authentype.data = (CARD8 *) 0;
authentype.length = (CARD16) 0;
authendata.data = (CARD8 *) 0;
authendata.length = (CARD16) 0;
authname.data = (CARD8 *) "MIT-MAGIC-COOKIE-1";
authname.length = strlen ((char *) authname.data);
authdata.data = (CARD8 *) d->bcookie;
authdata.length = 16;
header.version = XDM_PROTOCOL_VERSION;
header.opcode = (CARD16) ACCEPT;
header.length = 4;
header.length += 2 + authentype.length;
header.length += 2 + authendata.length;
header.length += 2 + authname.length;
header.length += 2 + authdata.length;
XdmcpWriteHeader (&buf, &header);
XdmcpWriteCARD32 (&buf, d->sessionid);
XdmcpWriteARRAY8 (&buf, &authentype);
XdmcpWriteARRAY8 (&buf, &authendata);
XdmcpWriteARRAY8 (&buf, &authname);
XdmcpWriteARRAY8 (&buf, &authdata);
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
char buffer6[INET6_ADDRSTRLEN];
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr)clnt_sa,
(int)sizeof (struct sockaddr_in6));
gdm_debug ("gdm_xdmcp_send_accept: Sending ACCEPT to %s with SessionID=%ld", inet_ntop (AF_INET6, &((struct sockaddr_in6 *)clnt_sa)->sin6_addr, buffer6, INET6_ADDRSTRLEN), (long)d->sessionid);
}
else
#endif
{
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr)clnt_sa,
(int)sizeof (struct sockaddr_in));
gdm_debug ("gdm_xdmcp_send_accept: Sending ACCEPT to %s with SessionID=%ld",
inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr), (long)d->sessionid);
}
}
static void
#ifdef ENABLE_IPV6
gdm_xdmcp_send_decline (struct sockaddr_storage *clnt_sa, const char *reason)
#else
gdm_xdmcp_send_decline (struct sockaddr_in *clnt_sa, const char *reason)
#endif
{
XdmcpHeader header;
ARRAY8 authentype;
ARRAY8 authendata;
ARRAY8 status;
GdmForwardQuery *fq;
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
char buffer6[INET6_ADDRSTRLEN];
gdm_debug ("gdm_xdmcp_send_decline: Sending DECLINE to %s",
inet_ntop (AF_INET6, &((struct sockaddr_in6 *)clnt_sa)->sin6_addr, buffer6, INET6_ADDRSTRLEN));
}
else
#endif
{
gdm_debug ("gdm_xdmcp_send_decline: Sending DECLINE to %s",
inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
}
authentype.data = (CARD8 *) 0;
authentype.length = (CARD16) 0;
authendata.data = (CARD8 *) 0;
authendata.length = (CARD16) 0;
status.data = (CARD8 *) reason;
status.length = strlen ((char *) status.data);
header.version = XDM_PROTOCOL_VERSION;
header.opcode = (CARD16) DECLINE;
header.length = 2 + status.length;
header.length += 2 + authentype.length;
header.length += 2 + authendata.length;
XdmcpWriteHeader (&buf, &header);
XdmcpWriteARRAY8 (&buf, &status);
XdmcpWriteARRAY8 (&buf, &authentype);
XdmcpWriteARRAY8 (&buf, &authendata);
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr)clnt_sa,
(int)sizeof (struct sockaddr_in6));
}
else
#endif
{
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr)clnt_sa,
(int)sizeof (struct sockaddr_in));
}
/* Send MANAGED_FORWARD to indicate that the connection
* reached some sort of resolution */
fq = gdm_forward_query_lookup (clnt_sa);
if (fq != NULL) {
gdm_xdmcp_send_managed_forward (fq->from_sa, clnt_sa);
gdm_forward_query_dispose (fq);
}
}
static void
#ifdef ENABLE_IPV6
gdm_xdmcp_handle_manage (struct sockaddr_storage *clnt_sa, gint len)
#else
gdm_xdmcp_handle_manage (struct sockaddr_in *clnt_sa, gint len)
#endif
{
CARD32 clnt_sessid;
CARD16 clnt_dspnum;
ARRAY8 clnt_dspclass;
GdmDisplay *d;
GdmIndirectDisplay *id;
GdmForwardQuery *fq;
#ifdef ENABLE_IPV6
char buffer6[INET6_ADDRSTRLEN];
inet_ntop (AF_INET6, &((struct sockaddr_in6 *)clnt_sa)->sin6_addr, buffer6, INET6_ADDRSTRLEN);
if (clnt_sa->ss_family == AF_INET6) {
gdm_debug ("gdm_xdmcp_handle_manage: Got MANAGE from %s", buffer6);
}
else
#endif
{
gdm_debug ("gdm_xdmcp_handle_manage: Got MANAGE from %s", inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
}
/* Check with tcp_wrappers if client is allowed to access */
if (! gdm_xdmcp_host_allow (clnt_sa)) {
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
gdm_error (_("%s: Got Manage from banned host %s"),
"gdm_xdmcp_handle_manage",
buffer6);
}
else
#endif
{
gdm_error (_("%s: Got Manage from banned host %s"),
"gdm_xdmcp_handle_manage",
inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
}
return;
}
/* SessionID */
if G_UNLIKELY (! XdmcpReadCARD32 (&buf, &clnt_sessid)) {
gdm_error (_("%s: Could not read Session ID"),
"gdm_xdmcp_handle_manage");
return;
}
/* Remote display number */
if G_UNLIKELY (! XdmcpReadCARD16 (&buf, &clnt_dspnum)) {
gdm_error (_("%s: Could not read Display Number"),
"gdm_xdmcp_handle_manage");
return;
}
/* Display Class */
if G_UNLIKELY (! XdmcpReadARRAY8 (&buf, &clnt_dspclass)) {
gdm_error (_("%s: Could not read Display Class"),
"gdm_xdmcp_handle_manage");
return;
}
if G_UNLIKELY (gdm_get_value_bool (GDM_KEY_DEBUG)) {
char *s = g_strndup ((char *) clnt_dspclass.data, clnt_dspclass.length);
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6)
gdm_debug ("gdm_xdmcp-handle_manage: Got display=%d, SessionID=%ld Class=%s from %s", (int)clnt_dspnum, (long)clnt_sessid, ve_sure_string (s), buffer6);
else
#endif
gdm_debug ("gdm_xdmcp_handle_manage: Got Display=%d, SessionID=%ld Class=%s from %s",
(int)clnt_dspnum, (long)clnt_sessid, ve_sure_string (s), inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
g_free (s);
}
d = gdm_xdmcp_display_lookup (clnt_sessid);
if (d != NULL &&
d->dispstat == XDMCP_PENDING) {
gdm_debug ("gdm_xdmcp_handle_manage: Looked up %s", d->name);
if (gdm_get_value_bool (GDM_KEY_INDIRECT)) {
id = gdm_choose_indirect_lookup (clnt_sa);
/* This was an indirect thingie and nothing was yet chosen,
* use a chooser */
if (d->dispstat == XDMCP_PENDING &&
id != NULL &&
id->chosen_host == NULL) {
d->use_chooser = TRUE;
d->indirect_id = id->id;
} else {
d->indirect_id = 0;
d->use_chooser = FALSE;
if (id != NULL)
gdm_choose_indirect_dispose (id);
}
} else {
d->indirect_id = 0;
d->use_chooser = FALSE;
}
/* this was from a forwarded query quite apparently so
* send MANAGED_FORWARD */
fq = gdm_forward_query_lookup (clnt_sa);
if (fq != NULL) {
gdm_xdmcp_send_managed_forward (fq->from_sa, clnt_sa);
gdm_forward_query_dispose (fq);
}
d->dispstat = XDMCP_MANAGED;
xdmcp_sessions++;
xdmcp_pending--;
/* Start greeter/session */
if G_UNLIKELY (!gdm_display_manage (d)) {
gdm_xdmcp_send_failed (clnt_sa, clnt_sessid);
XdmcpDisposeARRAY8(&clnt_dspclass);
return;
}
}
else if G_UNLIKELY (d != NULL && d->dispstat == XDMCP_MANAGED) {
gdm_debug ("gdm_xdmcp_handle_manage: Session id %ld already managed",
(long)clnt_sessid);
}
else {
gdm_debug ("gdm_xdmcp_handle_manage: Failed to look up session id %ld",
(long)clnt_sessid);
gdm_xdmcp_send_refuse (clnt_sa, clnt_sessid);
}
XdmcpDisposeARRAY8(&clnt_dspclass);
}
static void
#ifdef ENABLE_IPV6
gdm_xdmcp_handle_managed_forward (struct sockaddr_storage *clnt_sa, gint len)
#else
gdm_xdmcp_handle_managed_forward (struct sockaddr_in *clnt_sa, gint len)
#endif
{
ARRAY8 clnt_address;
GdmIndirectDisplay *id;
#ifdef ENABLE_IPV6
char buffer6[INET6_ADDRSTRLEN];
inet_ntop (AF_INET6, &((struct sockaddr_in6 *)clnt_sa)->sin6_addr, buffer6, INET6_ADDRSTRLEN);
if (clnt_sa->ss_family == AF_INET6) {
gdm_debug ("gdm_xdmcp_handle_managed_forward: "
"Got MANAGED_FORWARD from %s",
buffer6);
/* Check with tcp_wrappers if client is allowed to access */
if (! gdm_xdmcp_host_allow (clnt_sa)) {
gdm_error ("%s: Got MANAGED_FORWARD from banned host %s", "gdm_xdmcp_handle_request", buffer6);
return;
}
}
else
#endif
{
gdm_debug ("gdm_xdmcp_handle_managed_forward: "
"Got MANAGED_FORWARD from %s",
inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
/* Check with tcp_wrappers if client is allowed to access */
if (! gdm_xdmcp_host_allow (clnt_sa)) {
gdm_error ("%s: Got MANAGED_FORWARD from banned host %s",
"gdm_xdmcp_handle_request",
inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
return;
}
}
/* Hostname */
if G_UNLIKELY ( ! XdmcpReadARRAY8 (&buf, &clnt_address)) {
gdm_error (_("%s: Could not read address"),
"gdm_xdmcp_handle_managed_forward");
return;
}
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
if (clnt_address.length != sizeof (struct in6_addr)) {
gdm_error (_("%s: Could not read address"),
"gdm_xdmcp_handle_managed_forward");
XdmcpDisposeARRAY8 (&clnt_address);
return;
}
id = gdm_choose_indirect_lookup_by_chosen6 (&(((struct sockaddr_in6 *)clnt_sa)->sin6_addr), (struct in6_addr *)clnt_address.data);
}
else
#endif
{
if (clnt_address.length != sizeof (struct in_addr)) {
gdm_error (_("%s: Could not read address"),
"gdm_xdmcp_handle_managed_forward");
XdmcpDisposeARRAY8 (&clnt_address);
return;
}
id = gdm_choose_indirect_lookup_by_chosen
(&(((struct sockaddr_in *)clnt_sa)->sin_addr), (struct in_addr *)clnt_address.data);
}
if (id != NULL) {
gdm_choose_indirect_dispose (id);
}
/* Note: we send GOT even on not found, just in case our previous
* didn't get through and this was a second managed forward */
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
gdm_xdmcp_send_got_managed_forward6 ((struct sockaddr_in6 *)clnt_sa, (struct in6_addr *)clnt_address.data);
}
else
#endif
{
gdm_xdmcp_send_got_managed_forward ((struct sockaddr_in *)clnt_sa, (struct in_addr *)clnt_address.data);
}
XdmcpDisposeARRAY8 (&clnt_address);
}
#ifdef ENABLE_IPV6
static void
gdm_xdmcp_whack_queued_managed_forwards6 (struct sockaddr_in6 *clnt_sa,
struct in6_addr *origin)
{
GSList *li;
for (li = managed_forwards; li != NULL; li = li->next) {
ManagedForward *mf = li->data;
if ((memcmp (((struct sockaddr_in6 *)(&(mf->manager)))->sin6_addr.s6_addr, (clnt_sa->sin6_addr.s6_addr), sizeof (struct in6_addr)) == 0) &&
(memcmp (((struct sockaddr_in6 *)(&(mf->origin)))->sin6_addr.s6_addr, origin->s6_addr, sizeof (struct in6_addr)) == 0)) {
managed_forwards = g_slist_remove_link (managed_forwards, li);
g_slist_free_1 (li);
g_source_remove (mf->handler);
/* mf freed by glib */
return;
}
}
}
#endif
static void
gdm_xdmcp_whack_queued_managed_forwards (struct sockaddr_in *clnt_sa,
struct in_addr *origin)
{
GSList *li;
for (li = managed_forwards; li != NULL; li = li->next) {
ManagedForward *mf = li->data;
if (((struct sockaddr_in *)(&mf->manager))->sin_addr.s_addr == clnt_sa->sin_addr.s_addr &&
((struct sockaddr_in *)(&mf->origin))->sin_addr.s_addr == origin->s_addr) {
managed_forwards = g_slist_remove_link (managed_forwards, li);
g_slist_free_1 (li);
g_source_remove (mf->handler);
/* mf freed by glib */
return;
}
}
}
static void
#ifdef ENABLE_IPV6
gdm_xdmcp_handle_got_managed_forward (struct sockaddr_storage *clnt_sa, gint len)
#else
gdm_xdmcp_handle_got_managed_forward (struct sockaddr_in *clnt_sa, gint len)
#endif
{
ARRAY8 clnt_address;
#ifdef ENABLE_IPV6
char buffer6[INET6_ADDRSTRLEN];
if (clnt_sa->ss_family == AF_INET6) {
gdm_debug ("gdm_xdmcp_handle_got_managed_forward: "
"Got MANAGED_FORWARD from %s",
inet_ntop (AF_INET6, &((struct sockaddr_in6 *)clnt_sa)->sin6_addr, buffer6, INET6_ADDRSTRLEN));
if (! gdm_xdmcp_host_allow (clnt_sa)) {
gdm_error ("%s: Got GOT_MANAGED_FORWARD from banned host %s", "gdm_xdmcp_handle_request", buffer6);
return;
}
}
else
#endif
{
gdm_debug ("gdm_xdmcp_handle_got_managed_forward: "
"Got MANAGED_FORWARD from %s",
inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
/* Check with tcp_wrappers if client is allowed to access */
if (! gdm_xdmcp_host_allow (clnt_sa)) {
gdm_error ("%s: Got GOT_MANAGED_FORWARD from banned host %s",
"gdm_xdmcp_handle_request",
inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
return;
}
}
/* Hostname */
if G_UNLIKELY ( ! XdmcpReadARRAY8 (&buf, &clnt_address)) {
gdm_error (_("%s: Could not read address"),
"gdm_xdmcp_handle_got_managed_forward");
return;
}
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
if (clnt_address.length != sizeof (struct in6_addr)) {
gdm_error (_("%s: Could not read address"),
"gdm_xdmcp_handle_got_managed_forward");
XdmcpDisposeARRAY8 (&clnt_address);
return;
}
gdm_xdmcp_whack_queued_managed_forwards6 ((struct sockaddr_in6 *)clnt_sa, (struct in6_addr *)clnt_address.data);
}
else
#endif
{
if (clnt_address.length != sizeof (struct in_addr)) {
gdm_error (_("%s: Could not read address"),
"gdm_xdmcp_handle_got_managed_forward");
XdmcpDisposeARRAY8 (&clnt_address);
return;
}
gdm_xdmcp_whack_queued_managed_forwards ((struct sockaddr_in *)clnt_sa, (struct in_addr *)clnt_address.data);
}
XdmcpDisposeARRAY8 (&clnt_address);
}
static void
#ifdef ENABLE_IPV6
gdm_xdmcp_send_refuse (struct sockaddr_storage *clnt_sa, CARD32 sessid)
#else
gdm_xdmcp_send_refuse (struct sockaddr_in *clnt_sa, CARD32 sessid)
#endif
{
XdmcpHeader header;
GdmForwardQuery *fq;
gdm_debug ("gdm_xdmcp_send_refuse: Sending REFUSE to %ld", (long)sessid);
header.version = XDM_PROTOCOL_VERSION;
header.opcode= (CARD16) REFUSE;
header.length = 4;
XdmcpWriteHeader (&buf, &header);
XdmcpWriteCARD32 (&buf, sessid);
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr)clnt_sa,
(int)sizeof (struct sockaddr_in6));
}
else
#endif
{
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr)clnt_sa,
(int)sizeof (struct sockaddr_in));
}
/* this was from a forwarded query quite apparently so
* send MANAGED_FORWARD */
fq = gdm_forward_query_lookup (clnt_sa);
if (fq != NULL) {
gdm_xdmcp_send_managed_forward (fq->from_sa, clnt_sa);
gdm_forward_query_dispose (fq);
}
}
static void
#ifdef ENABLE_IPV6
gdm_xdmcp_send_failed (struct sockaddr_storage *clnt_sa, CARD32 sessid)
#else
gdm_xdmcp_send_failed (struct sockaddr_in *clnt_sa, CARD32 sessid)
#endif
{
XdmcpHeader header;
ARRAY8 status;
gdm_debug ("gdm_xdmcp_send_failed: Sending FAILED to %ld", (long)sessid);
/* Don't translate, this goes over the wire to servers where we
* don't know the charset or language, so it must be ascii */
status.data = (CARD8 *) "Failed to start session";
status.length = strlen ((char *) status.data);
header.version = XDM_PROTOCOL_VERSION;
header.opcode = (CARD16) FAILED;
header.length = 6+status.length;
XdmcpWriteHeader (&buf, &header);
XdmcpWriteCARD32 (&buf, sessid);
XdmcpWriteARRAY8 (&buf, &status);
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr)clnt_sa,
(int)sizeof (struct sockaddr_in6));
}
else
#endif
{
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr)clnt_sa,
(int)sizeof (struct sockaddr_in));
}
}
static void
#ifdef ENABLE_IPV6
gdm_xdmcp_handle_keepalive (struct sockaddr_storage *clnt_sa, gint len)
#else
gdm_xdmcp_handle_keepalive (struct sockaddr_in *clnt_sa, gint len)
#endif
{
CARD16 clnt_dspnum;
CARD32 clnt_sessid;
#ifdef ENABLE_IPV6
char buffer6[INET6_ADDRSTRLEN];
if (clnt_sa->ss_family == AF_INET6) {
gdm_debug ("gdm_xdmcp_handle_keepalive: Got KEEPALIVE from %s",
inet_ntop (AF_INET6, &(((struct sockaddr_in6 *)clnt_sa)->sin6_addr),
buffer6, INET6_ADDRSTRLEN));
/* Check with tcp_wrappers if client is allowed to access */
if (! gdm_xdmcp_host_allow (clnt_sa)) {
gdm_error (_("%s: Got KEEPALIVE from banned host %s"),
"gdm_xdmcp_handle_keepalive", buffer6);
return;
}
}
else
#endif
{
gdm_debug ("gdm_xdmcp_handle_keepalive: Got KEEPALIVE from %s",
inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
/* Check with tcp_wrappers if client is allowed to access */
if (! gdm_xdmcp_host_allow (clnt_sa)) {
gdm_error (_("%s: Got KEEPALIVE from banned host %s"),
"gdm_xdmcp_handle_keepalive",
inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr));
return;
}
}
/* Remote display number */
if G_UNLIKELY (! XdmcpReadCARD16 (&buf, &clnt_dspnum)) {
gdm_error (_("%s: Could not read Display Number"),
"gdm_xdmcp_handle_keepalive");
return;
}
/* SessionID */
if G_UNLIKELY (! XdmcpReadCARD32 (&buf, &clnt_sessid)) {
gdm_error (_("%s: Could not read Session ID"),
"gdm_xdmcp_handle_keepalive");
return;
}
gdm_xdmcp_send_alive (clnt_sa, clnt_dspnum, clnt_sessid);
}
static void
#ifdef ENABLE_IPV6
gdm_xdmcp_send_alive (struct sockaddr_storage *clnt_sa, CARD16 dspnum, CARD32 sessid)
#else
gdm_xdmcp_send_alive (struct sockaddr_in *clnt_sa, CARD16 dspnum, CARD32 sessid)
#endif
{
XdmcpHeader header;
GdmDisplay *d;
int send_running = 0;
CARD32 send_sessid = 0;
d = gdm_xdmcp_display_lookup (sessid);
if (d == NULL)
d = gdm_xdmcp_display_lookup_by_host (clnt_sa, dspnum);
if (d != NULL) {
send_sessid = d->sessionid;
if (d->dispstat == XDMCP_MANAGED)
send_running = 1;
}
gdm_debug ("Sending ALIVE to %ld (running %d, sessid %ld)",
(long)sessid, send_running, (long)send_sessid);
header.version = XDM_PROTOCOL_VERSION;
header.opcode = (CARD16) ALIVE;
header.length = 5;
XdmcpWriteHeader (&buf, &header);
XdmcpWriteCARD8 (&buf, send_running);
XdmcpWriteCARD32 (&buf, send_sessid);
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr)clnt_sa,
(int)sizeof (struct sockaddr_in6));
}
else
#endif
{
XdmcpFlush (gdm_xdmcpfd, &buf, (XdmcpNetaddr)clnt_sa,
(int)sizeof (struct sockaddr_in));
}
}
static gboolean
gdm_xdmcp_host_allow (
#ifdef ENABLE_IPV6
struct sockaddr_storage *clnt_sa
#else
struct sockaddr_in *clnt_sa
#endif
)
{
#ifdef HAVE_TCPWRAPPERS
/* avoids a warning, my tcpd.h file doesn't include this prototype, even
* though the library does include the function and the manpage mentions it
*/
extern int hosts_ctl (char *daemon, char *client_name, char *client_addr, char *client_user);
GdmHostent *client_he;
char *client;
gboolean ret;
/* Find client hostname */
client_he = gdm_gethostbyaddr (clnt_sa);
if (client_he->not_found)
client = "unknown";
else {
gdm_debug ("gdm_xdmcp_host_allow: client->hostname is %s\n", client_he->hostname);
client = client_he->hostname;
}
/* Check with tcp_wrappers if client is allowed to access */
#ifdef ENABLE_IPV6
if (clnt_sa->ss_family == AF_INET6) {
char buffer6[INET6_ADDRSTRLEN];
ret = (hosts_ctl ("gdm", client, (char *) inet_ntop (AF_INET6, &((struct sockaddr_in6 *)clnt_sa)->sin6_addr, buffer6, INET6_ADDRSTRLEN), ""));
} else
#endif
{
ret = (hosts_ctl ("gdm", client, inet_ntoa (((struct sockaddr_in *)clnt_sa)->sin_addr), ""));
}
gdm_hostent_free (client_he);
return ret;
#else /* HAVE_TCPWRAPPERS */
return (TRUE);
#endif /* HAVE_TCPWRAPPERS */
}
static GdmDisplay *
gdm_xdmcp_display_alloc (
#ifdef ENABLE_IPV6
struct sockaddr_storage *addr,
#else
struct sockaddr_in *addr,
#endif
GdmHostent *he /* eaten and freed */,
int displaynum)
{
GdmDisplay *d = NULL;
char *proxycmd = gdm_get_value_string (GDM_KEY_XDMCP_PROXY_XSERVER);
d = g_new0 (GdmDisplay, 1);
if (gdm_get_value_bool (GDM_KEY_XDMCP_PROXY) && proxycmd != NULL) {
d->type = TYPE_XDMCP_PROXY;
d->command = g_strdup (proxycmd);
gdm_debug ("Using proxy server for XDMCP: %s\n", d->command);
} else {
d->type = TYPE_XDMCP;
}
d->logout_action = GDM_LOGOUT_ACTION_NONE;
d->authfile = NULL;
d->auths = NULL;
d->userauth = NULL;
d->greetpid = 0;
d->servpid = 0;
d->servstat = 0;
d->sesspid = 0;
d->slavepid = 0;
d->attached = FALSE;
d->dispstat = XDMCP_PENDING;
d->sessionid = globsessid++;
if (d->sessionid == 0)
d->sessionid = globsessid++;
d->acctime = time (NULL);
d->dispnum = displaynum;
d->xdmcp_dispnum = displaynum;
d->handled = TRUE;
d->tcp_disallowed = FALSE;
d->vt = -1;
d->x_servers_order = -1;
d->logged_in = FALSE;
d->login = NULL;
d->sleep_before_run = 0;
if (gdm_get_value_bool (GDM_KEY_ALLOW_REMOTE_AUTOLOGIN) &&
! ve_string_empty (gdm_get_value_string (GDM_KEY_TIMED_LOGIN))) {
d->timed_login_ok = TRUE;
} else {
d->timed_login_ok = FALSE;
}
d->name = g_strdup_printf ("%s:%d", he->hostname,
displaynum);
#ifdef ENABLE_IPV6
if (addr->ss_family == AF_INET6) {
memcpy (&d->addr6, &((struct sockaddr_in6 *)addr)->sin6_addr, sizeof (struct in6_addr));
d->addrtype = AF_INET6;
}
else
#endif
{
memcpy (&d->addr, &((struct sockaddr_in *)addr)->sin_addr, sizeof (struct in_addr));
d->addrtype = AF_INET;
}
d->hostname = he->hostname;
he->hostname = NULL;
d->addrs = he->addrs;
he->addrs = NULL;
d->addr_count = he->addr_count;
he->addr_count = 0;
gdm_hostent_free (he);
d->slave_notify_fd = -1;
d->master_notify_fd = -1;
d->xsession_errors_bytes = 0;
d->xsession_errors_fd = -1;
d->session_output_fd = -1;
d->chooser_output_fd = -1;
d->chooser_last_line = NULL;
d->theme_name = NULL;
/* Secure display with cookie */
if G_UNLIKELY (! gdm_auth_secure_display (d))
gdm_error ("gdm_xdmcp_display_alloc: Error setting up cookies for %s", d->name);
if (d->type == TYPE_XDMCP_PROXY) {
d->parent_disp = d->name;
d->name = g_strdup (":-1");
d->dispnum = -1;
d->server_uid = gdm_get_gdmuid ();
d->parent_auth_file = d->authfile;
d->authfile = NULL;
}
displays = g_slist_append (displays, d);
xdmcp_pending++;
gdm_debug ("gdm_xdmcp_display_alloc: display=%s, session id=%ld, xdmcp_pending=%d ",
d->name, (long)d->sessionid, xdmcp_pending);
return d;
}
static GdmDisplay *
gdm_xdmcp_display_lookup (CARD32 sessid)
{
GSList *dlist = displays;
GdmDisplay *d;
if (!sessid)
return (NULL);
while (dlist) {
d = (GdmDisplay *) dlist->data;
if (d && d->sessionid == sessid)
return (d);
dlist = dlist->next;
}
return (NULL);
}
static void
gdm_xdmcp_display_dispose_check (const gchar *hostname, int dspnum)
{
GSList *dlist;
if (hostname == NULL)
return;
gdm_debug ("gdm_xdmcp_display_dispose_check (%s:%d)", hostname, dspnum);
dlist = displays;
while (dlist != NULL) {
GdmDisplay *d = dlist->data;
if (d != NULL &&
SERVER_IS_XDMCP (d) &&
d->xdmcp_dispnum == dspnum &&
strcmp (d->hostname, hostname) == 0) {
if (d->dispstat == XDMCP_MANAGED)
gdm_display_unmanage (d);
else
gdm_display_dispose (d);
/* restart as the list is now broken */
dlist = displays;
} else {
/* just go on */
dlist = dlist->next;
}
}
}
static void
gdm_xdmcp_displays_check (void)
{
GSList *dlist;
time_t curtime = time (NULL);
dlist = displays;
while (dlist != NULL) {
GdmDisplay *d = dlist->data;
if (d != NULL &&
SERVER_IS_XDMCP (d) &&
d->dispstat == XDMCP_PENDING &&
curtime > d->acctime + gdm_get_value_int (GDM_KEY_MAX_WAIT)) {
gdm_debug ("gdm_xdmcp_displays_check: Disposing session id %ld",
(long)d->sessionid);
gdm_display_dispose (d);
/* restart as the list is now broken */
dlist = displays;
} else {
/* just go on */
dlist = dlist->next;
}
}
}
static void
reconnect_to_parent (GdmDisplay *to)
{
GError *error;
gchar *command_argv[10];
gchar *proxyreconnect = gdm_get_value_string (GDM_KEY_XDMCP_PROXY_RECONNECT);
command_argv[0] = proxyreconnect;
command_argv[1] = "--display";
command_argv[2] = to->parent_disp;
command_argv[3] = "--display-authfile";
command_argv[4] = to->parent_auth_file;
command_argv[5] = "--to";
command_argv[6] = to->name;
command_argv[7] = "--to-authfile";
command_argv[8] = to->authfile;
command_argv[9] = NULL;
gdm_debug ("XDMCP: migrating display by running "
"'%s --display %s --display-authfile %s --to %s --to-authfile %s'",
proxyreconnect,
to->parent_disp, to->parent_auth_file,
to->name, to->authfile);
error = NULL;
if (!g_spawn_async (NULL, command_argv, NULL, 0, NULL, NULL, NULL, &error)) {
gdm_error (_("%s: Failed to run "
"'%s --display %s --display-authfile %s --to %s --to-authfile %s': %s"),
"gdm_xdmcp_migrate",
proxyreconnect,
to->parent_disp, to->parent_auth_file,
to->name, to->authfile,
error->message);
g_error_free (error);
}
}
void
gdm_xdmcp_migrate (GdmDisplay *from, GdmDisplay *to)
{
if (from->type != TYPE_XDMCP_PROXY ||
to->type != TYPE_XDMCP_PROXY)
return;
g_free (to->parent_disp);
to->parent_disp = from->parent_disp;
from->parent_disp = NULL;
g_free (to->parent_auth_file);
to->parent_auth_file = from->parent_auth_file;
from->parent_auth_file = NULL;
reconnect_to_parent (to);
}
#else /* HAVE_LIBXDMCP */
/* Here come some empty stubs for no XDMCP support */
int
gdm_xdmcp_init (void)
{
gdm_error (_("%s: No XDMCP support"), "gdm_xdmcp_init");
return FALSE;
}
void
gdm_xdmcp_run (void)
{
gdm_error (_("%s: No XDMCP support"), "gdm_xdmcp_run");
}
void
gdm_xdmcp_close (void)
{
gdm_error (_("%s: No XDMCP support"), "gdm_xdmcp_close");
}
void
gdm_xdmcp_migrate (GdmDisplay *from, GdmDisplay *to)
{
gdm_error (_("%s: No XDMCP support"), "gdm_xdmcp_migrate");
}
#endif /* HAVE_LIBXDMCP */
/* EOF */
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