[134] | 1 | /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- |
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| 2 | * |
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| 3 | * Copyright (C) 1998, 1999, 2000 Martin K. Petersen <mkp@mkp.net> |
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| 4 | * Copyright (C) 2007 William Jon McCann <mccann@jhu.edu> |
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| 5 | * |
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| 6 | * This program is free software; you can redistribute it and/or modify |
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| 7 | * it under the terms of the GNU General Public License as published by |
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| 8 | * the Free Software Foundation; either version 2 of the License, or |
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| 9 | * (at your option) any later version. |
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| 10 | * |
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| 11 | * This program is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | * GNU General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU General Public License |
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| 17 | * along with this program; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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| 19 | * |
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| 20 | */ |
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| 21 | |
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| 22 | #include "config.h" |
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| 23 | |
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| 24 | #include <stdlib.h> |
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| 25 | #include <stdio.h> |
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| 26 | #include <fcntl.h> |
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| 27 | #include <unistd.h> |
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| 28 | #include <string.h> |
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| 29 | #include <signal.h> |
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| 30 | #include <sys/stat.h> |
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| 31 | #include <sys/types.h> |
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| 32 | #include <sys/utsname.h> |
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| 33 | |
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| 34 | #include <sys/socket.h> |
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| 35 | #include <netdb.h> |
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| 36 | #include <arpa/inet.h> |
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| 37 | #include <net/if.h> |
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| 38 | #ifdef HAVE_SYS_SOCKIO_H |
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| 39 | #include <sys/sockio.h> |
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| 40 | #endif |
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| 41 | #include <sys/ioctl.h> |
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| 42 | |
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| 43 | #include <errno.h> |
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| 44 | |
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| 45 | #include <glib.h> |
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| 46 | #include <glib/gi18n.h> |
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| 47 | #include <glib/gstdio.h> |
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| 48 | #include <glib-object.h> |
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| 49 | |
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| 50 | #include <X11/Xlib.h> |
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| 51 | #include <X11/Xmd.h> |
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| 52 | #include <X11/Xdmcp.h> |
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| 53 | |
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| 54 | #include "gdm-common.h" |
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| 55 | #include "gdm-xdmcp-greeter-display.h" |
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| 56 | #include "gdm-xdmcp-chooser-display.h" |
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| 57 | #include "gdm-display-factory.h" |
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| 58 | #include "gdm-xdmcp-display-factory.h" |
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| 59 | #include "gdm-display-store.h" |
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| 60 | #include "gdm-settings-direct.h" |
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| 61 | #include "gdm-settings-keys.h" |
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| 62 | |
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| 63 | /* |
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| 64 | * On Sun, we need to define allow_severity and deny_severity to link |
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| 65 | * against libwrap. |
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| 66 | */ |
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| 67 | #ifdef __sun |
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| 68 | #include <syslog.h> |
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| 69 | int allow_severity = LOG_INFO; |
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| 70 | int deny_severity = LOG_WARNING; |
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| 71 | #endif |
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| 72 | |
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| 73 | #define GDM_XDMCP_DISPLAY_FACTORY_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GDM_TYPE_XDMCP_DISPLAY_FACTORY, GdmXdmcpDisplayFactoryPrivate)) |
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| 74 | |
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| 75 | #define DEFAULT_PORT 177 |
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| 76 | #define DEFAULT_USE_MULTICAST FALSE |
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| 77 | #define DEFAULT_MULTICAST_ADDRESS "ff02::1" |
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| 78 | #define DEFAULT_HONOR_INDIRECT TRUE |
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| 79 | #define DEFAULT_MAX_DISPLAYS_PER_HOST 1 |
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| 80 | #define DEFAULT_MAX_DISPLAYS 16 |
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| 81 | #define DEFAULT_MAX_PENDING_DISPLAYS 4 |
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| 82 | #define DEFAULT_MAX_WAIT 30 |
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| 83 | #define DEFAULT_MAX_WAIT_INDIRECT 30 |
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| 84 | #define DEFAULT_WILLING_SCRIPT GDMCONFDIR "/Xwilling" |
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| 85 | |
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| 86 | #define GDM_MAX_FORWARD_QUERIES 10 |
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| 87 | #define GDM_FORWARD_QUERY_TIMEOUT 30 |
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| 88 | #define MANAGED_FORWARD_INTERVAL 1500 /* 1.5 seconds */ |
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| 89 | |
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| 90 | /* some extra XDMCP opcodes that xdm will happily ignore since they'll be |
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| 91 | * the wrong XDMCP version anyway */ |
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| 92 | #define GDM_XDMCP_PROTOCOL_VERSION 1001 |
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| 93 | enum { |
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| 94 | GDM_XDMCP_FIRST_OPCODE = 1000, /*just a marker, not an opcode */ |
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| 95 | |
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| 96 | GDM_XDMCP_MANAGED_FORWARD = 1000, |
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| 97 | /* manager (master) -> manager |
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| 98 | * A packet with MANAGED_FORWARD is sent to the |
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| 99 | * manager that sent the forward query from the manager to |
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| 100 | * which forward query was sent. It indicates that the forward |
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| 101 | * was fully processed and that the client now has either |
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| 102 | * a managed session, or has been sent denial, refuse or failed. |
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| 103 | * (if the denial gets lost then client gets dumped into the |
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| 104 | * chooser again). This should be resent a few times |
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| 105 | * until some (short) timeout or until GOT_MANAGED_FORWARD |
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| 106 | * is sent. GDM sends at most 3 packates with 1.5 seconds |
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| 107 | * between each. |
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| 108 | * |
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| 109 | * Argument is ARRAY8 with the address of the originating host */ |
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| 110 | GDM_XDMCP_GOT_MANAGED_FORWARD, |
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| 111 | /* manager -> manager (master) |
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| 112 | * A single packet with GOT_MANAGED_FORWARD is sent to indicate |
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| 113 | * that we did receive the MANAGED_FORWARD packet. The argument |
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| 114 | * must match the MANAGED_FORWARD one or it will just be ignored. |
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| 115 | * |
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| 116 | * Argument is ARRAY8 with the address of the originating host */ |
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| 117 | GDM_XDMCP_LAST_OPCODE /*just a marker, not an opcode */ |
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| 118 | }; |
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| 119 | |
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| 120 | /* |
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| 121 | * We don't support XDM-AUTHENTICATION-1 and XDM-AUTHORIZATION-1. |
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| 122 | * |
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| 123 | * The latter would be quite useful to avoid sending unencrypted |
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| 124 | * cookies over the wire. Unfortunately it isn't supported without |
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| 125 | * XDM-AUTHENTICATION-1 which requires a key database with private |
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| 126 | * keys from all X terminals on your LAN. Fun, fun, fun. |
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| 127 | * |
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| 128 | * Furthermore user passwords go over the wire in cleartext anyway, |
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| 129 | * so protecting cookies is not that important. |
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| 130 | */ |
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| 131 | |
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| 132 | typedef struct _XdmAuth { |
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| 133 | ARRAY8 authentication; |
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| 134 | ARRAY8 authorization; |
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| 135 | } XdmAuthRec, *XdmAuthPtr; |
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| 136 | |
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| 137 | static XdmAuthRec serv_authlist = { |
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| 138 | { (CARD16) 0, (CARD8 *) 0 }, |
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| 139 | { (CARD16) 0, (CARD8 *) 0 } |
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| 140 | }; |
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| 141 | |
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| 142 | /* NOTE: Timeout and max are hardcoded */ |
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| 143 | typedef struct _ForwardQuery { |
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| 144 | time_t acctime; |
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| 145 | GdmAddress *dsp_address; |
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| 146 | GdmAddress *from_address; |
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| 147 | } ForwardQuery; |
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| 148 | |
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| 149 | typedef struct _IndirectClient { |
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| 150 | int id; |
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| 151 | GdmAddress *dsp_address; |
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| 152 | GdmAddress *chosen_address; |
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| 153 | time_t acctime; |
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| 154 | } IndirectClient; |
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| 155 | |
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| 156 | typedef struct { |
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| 157 | int times; |
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| 158 | guint handler; |
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| 159 | GdmAddress *manager; |
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| 160 | GdmAddress *origin; |
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| 161 | GdmXdmcpDisplayFactory *xdmcp_display_factory; |
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| 162 | } ManagedForward; |
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| 163 | |
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| 164 | struct GdmXdmcpDisplayFactoryPrivate |
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| 165 | { |
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| 166 | GSList *forward_queries; |
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| 167 | GSList *managed_forwards; |
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| 168 | GSList *indirect_clients; |
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| 169 | |
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| 170 | int socket_fd; |
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| 171 | gint32 session_serial; |
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| 172 | guint socket_watch_id; |
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| 173 | XdmcpBuffer buf; |
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| 174 | |
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| 175 | guint num_sessions; |
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| 176 | guint num_pending_sessions; |
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| 177 | |
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| 178 | char *sysid; |
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| 179 | char *hostname; |
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| 180 | ARRAY8 servhost; |
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| 181 | |
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| 182 | /* configuration */ |
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| 183 | guint port; |
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| 184 | gboolean use_multicast; |
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| 185 | char *multicast_address; |
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| 186 | gboolean honor_indirect; |
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| 187 | char *willing_script; |
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| 188 | guint max_displays_per_host; |
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| 189 | guint max_displays; |
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| 190 | guint max_pending_displays; |
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| 191 | guint max_wait; |
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| 192 | guint max_wait_indirect; |
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| 193 | }; |
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| 194 | |
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| 195 | enum { |
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| 196 | PROP_0, |
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| 197 | PROP_PORT, |
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| 198 | PROP_USE_MULTICAST, |
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| 199 | PROP_MULTICAST_ADDRESS, |
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| 200 | PROP_HONOR_INDIRECT, |
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| 201 | PROP_WILLING_SCRIPT, |
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| 202 | PROP_MAX_DISPLAYS_PER_HOST, |
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| 203 | PROP_MAX_DISPLAYS, |
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| 204 | PROP_MAX_PENDING_DISPLAYS, |
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| 205 | PROP_MAX_WAIT, |
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| 206 | PROP_MAX_WAIT_INDIRECT, |
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| 207 | }; |
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| 208 | |
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| 209 | static void gdm_xdmcp_display_factory_class_init (GdmXdmcpDisplayFactoryClass *klass); |
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| 210 | static void gdm_xdmcp_display_factory_init (GdmXdmcpDisplayFactory *manager); |
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| 211 | static void gdm_xdmcp_display_factory_finalize (GObject *object); |
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| 212 | |
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| 213 | static gpointer xdmcp_display_factory_object = NULL; |
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| 214 | |
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| 215 | G_DEFINE_TYPE (GdmXdmcpDisplayFactory, gdm_xdmcp_display_factory, GDM_TYPE_DISPLAY_FACTORY) |
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| 216 | |
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| 217 | /* Theory of operation: |
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| 218 | * |
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| 219 | * Process idles waiting for UDP packets on port 177. |
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| 220 | * Incoming packets are decoded and checked against tcp_wrapper. |
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| 221 | * |
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| 222 | * A typical session looks like this: |
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| 223 | * |
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| 224 | * Display sends Query/BroadcastQuery to Manager. |
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| 225 | * |
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| 226 | * Manager selects an appropriate authentication scheme from the |
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| 227 | * display's list of supported ones and sends Willing/Unwilling. |
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| 228 | * |
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| 229 | * Assuming the display accepts the auth. scheme it sends back a |
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| 230 | * Request. |
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| 231 | * |
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| 232 | * If the manager accepts to service the display (i.e. loadavg is low) |
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| 233 | * it sends back an Accept containing a unique SessionID. The |
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| 234 | * SessionID is stored in an accept queue by the Manager. Should the |
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| 235 | * manager refuse to start a session a Decline is sent to the display. |
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| 236 | * |
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| 237 | * The display returns a Manage request containing the supplied |
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| 238 | * SessionID. The manager will then start a session on the display. In |
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| 239 | * case the SessionID is not on the accept queue the manager returns |
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| 240 | * Refuse. If the manager fails to open the display for connections |
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| 241 | * Failed is returned. |
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| 242 | * |
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| 243 | * During the session the display periodically sends KeepAlive packets |
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| 244 | * to the manager. The manager responds with Alive. |
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| 245 | * |
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| 246 | * Similarly the manager xpings the display once in a while and shuts |
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| 247 | * down the connection on failure. |
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| 248 | * |
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| 249 | */ |
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| 250 | |
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| 251 | GQuark |
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| 252 | gdm_xdmcp_display_factory_error_quark (void) |
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| 253 | { |
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| 254 | static GQuark ret = 0; |
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| 255 | if (ret == 0) { |
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| 256 | ret = g_quark_from_static_string ("gdm_xdmcp_display_factory_error"); |
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| 257 | } |
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| 258 | |
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| 259 | return ret; |
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| 260 | } |
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| 261 | |
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| 262 | static gint32 |
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| 263 | get_next_session_serial (GdmXdmcpDisplayFactory *factory) |
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| 264 | { |
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| 265 | gint32 serial; |
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| 266 | |
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| 267 | again: |
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| 268 | if (factory->priv->session_serial != G_MAXINT32) { |
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| 269 | serial = factory->priv->session_serial++; |
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| 270 | } else { |
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| 271 | serial = g_random_int (); |
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| 272 | } |
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| 273 | |
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| 274 | if (serial == 0) { |
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| 275 | goto again; |
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| 276 | } |
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| 277 | |
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| 278 | return serial; |
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| 279 | } |
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| 280 | |
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| 281 | /* for debugging */ |
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| 282 | static const char * |
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| 283 | ai_family_str (struct addrinfo *ai) |
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| 284 | { |
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| 285 | const char *str; |
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| 286 | switch (ai->ai_family) { |
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| 287 | case AF_INET: |
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| 288 | str = "inet"; |
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| 289 | break; |
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| 290 | case AF_INET6: |
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| 291 | str = "inet6"; |
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| 292 | break; |
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| 293 | case AF_UNIX: |
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| 294 | str = "unix"; |
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| 295 | break; |
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| 296 | case AF_UNSPEC: |
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| 297 | str = "unspecified"; |
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| 298 | break; |
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| 299 | default: |
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| 300 | str = "unknown"; |
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| 301 | break; |
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| 302 | } |
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| 303 | return str; |
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| 304 | } |
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| 305 | |
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| 306 | /* for debugging */ |
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| 307 | static const char * |
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| 308 | ai_type_str (struct addrinfo *ai) |
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| 309 | { |
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| 310 | const char *str; |
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| 311 | switch (ai->ai_socktype) { |
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| 312 | case SOCK_STREAM: |
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| 313 | str = "stream"; |
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| 314 | break; |
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| 315 | case SOCK_DGRAM: |
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| 316 | str = "datagram"; |
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| 317 | break; |
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| 318 | case SOCK_SEQPACKET: |
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| 319 | str = "seqpacket"; |
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| 320 | break; |
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| 321 | case SOCK_RAW: |
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| 322 | str = "raw"; |
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| 323 | break; |
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| 324 | default: |
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| 325 | str = "unknown"; |
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| 326 | break; |
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| 327 | } |
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| 328 | return str; |
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| 329 | } |
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| 330 | |
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| 331 | /* for debugging */ |
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| 332 | static const char * |
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| 333 | ai_protocol_str (struct addrinfo *ai) |
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| 334 | { |
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| 335 | const char *str; |
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| 336 | switch (ai->ai_protocol) { |
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| 337 | case 0: |
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| 338 | str = "default"; |
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| 339 | break; |
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| 340 | case IPPROTO_TCP: |
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| 341 | str = "TCP"; |
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| 342 | break; |
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| 343 | case IPPROTO_UDP: |
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| 344 | str = "UDP"; |
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| 345 | break; |
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| 346 | case IPPROTO_RAW: |
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| 347 | str = "raw"; |
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| 348 | break; |
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| 349 | default: |
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| 350 | str = "unknown"; |
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| 351 | break; |
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| 352 | } |
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| 353 | |
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| 354 | return str; |
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| 355 | } |
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| 356 | |
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| 357 | /* for debugging */ |
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| 358 | static char * |
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| 359 | ai_flags_str (struct addrinfo *ai) |
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| 360 | { |
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| 361 | GString *str; |
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| 362 | |
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| 363 | str = g_string_new (""); |
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| 364 | if (ai->ai_flags == 0) { |
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| 365 | g_string_append (str, "none"); |
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| 366 | } else { |
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| 367 | if (ai->ai_flags & AI_PASSIVE) { |
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| 368 | g_string_append (str, "passive "); |
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| 369 | } |
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| 370 | if (ai->ai_flags & AI_CANONNAME) { |
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| 371 | g_string_append (str, "canon "); |
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| 372 | } |
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| 373 | if (ai->ai_flags & AI_NUMERICHOST) { |
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| 374 | g_string_append (str, "numhost "); |
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| 375 | } |
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| 376 | if (ai->ai_flags & AI_NUMERICSERV) { |
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| 377 | g_string_append (str, "numserv "); |
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| 378 | } |
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| 379 | if (ai->ai_flags & AI_V4MAPPED) { |
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| 380 | g_string_append (str, "v4mapped "); |
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| 381 | } |
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| 382 | if (ai->ai_flags & AI_ALL) { |
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| 383 | g_string_append (str, "all "); |
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| 384 | } |
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| 385 | } |
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| 386 | return g_string_free (str, FALSE); |
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| 387 | } |
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| 388 | |
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| 389 | /* for debugging */ |
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| 390 | static void |
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| 391 | debug_addrinfo (struct addrinfo *ai) |
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| 392 | { |
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| 393 | char *str; |
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| 394 | str = ai_flags_str (ai); |
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| 395 | g_debug ("GdmXdmcpDisplayFactory: addrinfo family=%s type=%s proto=%s flags=%s", |
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| 396 | ai_family_str (ai), |
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| 397 | ai_type_str (ai), |
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| 398 | ai_protocol_str (ai), |
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| 399 | str); |
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| 400 | g_free (str); |
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| 401 | } |
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| 402 | |
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| 403 | static int |
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| 404 | create_socket (struct addrinfo *ai) |
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| 405 | { |
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| 406 | int sock; |
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| 407 | |
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| 408 | sock = socket (ai->ai_family, ai->ai_socktype, ai->ai_protocol); |
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| 409 | if (sock < 0) { |
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| 410 | g_warning ("socket: %s", g_strerror (errno)); |
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| 411 | return sock; |
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| 412 | } |
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| 413 | |
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| 414 | if (bind (sock, ai->ai_addr, ai->ai_addrlen) < 0) { |
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| 415 | g_warning ("bind: %s", g_strerror (errno)); |
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| 416 | close (sock); |
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| 417 | return -1; |
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| 418 | } |
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| 419 | |
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| 420 | return sock; |
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| 421 | } |
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| 422 | |
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| 423 | static int |
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| 424 | do_bind (guint port, |
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| 425 | int family, |
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| 426 | struct sockaddr_storage * hostaddr) |
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| 427 | { |
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| 428 | struct addrinfo hints; |
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| 429 | struct addrinfo *ai_list; |
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| 430 | struct addrinfo *ai; |
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| 431 | char strport[NI_MAXSERV]; |
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| 432 | int gaierr; |
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| 433 | int sock; |
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| 434 | |
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| 435 | sock = -1; |
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| 436 | |
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| 437 | memset (&hints, 0, sizeof (hints)); |
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| 438 | hints.ai_family = family; |
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| 439 | hints.ai_socktype = SOCK_DGRAM; |
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| 440 | hints.ai_flags = AI_PASSIVE; |
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| 441 | |
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| 442 | snprintf (strport, sizeof (strport), "%u", port); |
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| 443 | |
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| 444 | ai_list = NULL; |
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| 445 | if ((gaierr = getaddrinfo (NULL, strport, &hints, &ai_list)) != 0) { |
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| 446 | g_error ("Unable to connect to socket: %s", gai_strerror (gaierr)); |
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| 447 | } |
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| 448 | |
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| 449 | /* should only be one but.. */ |
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| 450 | for (ai = ai_list; ai != NULL; ai = ai->ai_next) { |
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| 451 | if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6) { |
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| 452 | continue; |
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| 453 | } |
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| 454 | |
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| 455 | debug_addrinfo (ai); |
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| 456 | |
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| 457 | if (sock < 0) { |
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| 458 | char *host; |
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| 459 | char *serv; |
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| 460 | GdmAddress *addr; |
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| 461 | |
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| 462 | addr = gdm_address_new_from_sockaddr (ai->ai_addr, ai->ai_addrlen); |
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| 463 | |
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| 464 | host = NULL; |
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| 465 | serv = NULL; |
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| 466 | gdm_address_get_numeric_info (addr, &host, &serv); |
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| 467 | g_debug ("GdmXdmcpDisplayFactory: Attempting to bind to host %s port %s", host, serv); |
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| 468 | g_free (host); |
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| 469 | g_free (serv); |
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| 470 | gdm_address_free (addr); |
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| 471 | |
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| 472 | sock = create_socket (ai); |
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| 473 | if (sock >= 0) { |
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| 474 | if (hostaddr != NULL) { |
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| 475 | memcpy (hostaddr, ai->ai_addr, ai->ai_addrlen); |
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| 476 | } |
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| 477 | } |
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| 478 | } |
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| 479 | } |
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| 480 | |
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| 481 | freeaddrinfo (ai_list); |
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| 482 | |
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| 483 | return sock; |
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| 484 | } |
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| 485 | |
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| 486 | static void |
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| 487 | setup_multicast (GdmXdmcpDisplayFactory *factory) |
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| 488 | { |
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| 489 | #ifdef ENABLE_IPV6 |
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| 490 | /* Checking and Setting Multicast options */ |
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| 491 | { |
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| 492 | /* |
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| 493 | * socktemp is a temporary socket for getting info about |
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| 494 | * available interfaces |
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| 495 | */ |
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| 496 | int socktemp; |
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| 497 | int i; |
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| 498 | int num; |
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| 499 | char *buf; |
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| 500 | struct ipv6_mreq mreq; |
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| 501 | |
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| 502 | /* For interfaces' list */ |
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| 503 | struct ifconf ifc; |
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| 504 | struct ifreq *ifr; |
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| 505 | |
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| 506 | socktemp = socket (AF_INET, SOCK_DGRAM, 0); |
---|
| 507 | #ifdef SIOCGIFNUM |
---|
| 508 | if (ioctl (socktemp, SIOCGIFNUM, &num) < 0) { |
---|
| 509 | num = 64; |
---|
| 510 | } |
---|
| 511 | #else |
---|
| 512 | num = 64; |
---|
| 513 | #endif /* SIOCGIFNUM */ |
---|
| 514 | ifc.ifc_len = sizeof (struct ifreq) * num; |
---|
| 515 | ifc.ifc_buf = buf = malloc (ifc.ifc_len); |
---|
| 516 | |
---|
| 517 | if (ioctl (socktemp, SIOCGIFCONF, &ifc) >= 0) { |
---|
| 518 | ifr = ifc.ifc_req; |
---|
| 519 | num = ifc.ifc_len / sizeof (struct ifreq); /* No of interfaces */ |
---|
| 520 | |
---|
| 521 | /* Joining multicast group with all interfaces */ |
---|
| 522 | for (i = 0 ; i < num ; i++) { |
---|
| 523 | struct ifreq ifreq; |
---|
| 524 | int ifindex; |
---|
| 525 | |
---|
| 526 | memset (&ifreq, 0, sizeof (ifreq)); |
---|
| 527 | strncpy (ifreq.ifr_name, ifr[i].ifr_name, sizeof (ifreq.ifr_name)); |
---|
| 528 | /* paranoia */ |
---|
| 529 | ifreq.ifr_name[sizeof (ifreq.ifr_name) - 1] = '\0'; |
---|
| 530 | |
---|
| 531 | if (ioctl (socktemp, SIOCGIFFLAGS, &ifreq) < 0) { |
---|
| 532 | g_debug ("GdmXdmcpDisplayFactory: Could not get SIOCGIFFLAGS for %s", |
---|
| 533 | ifr[i].ifr_name); |
---|
| 534 | } |
---|
| 535 | |
---|
| 536 | ifindex = if_nametoindex (ifr[i].ifr_name); |
---|
| 537 | |
---|
| 538 | if ((!(ifreq.ifr_flags & IFF_UP) || |
---|
| 539 | (ifreq.ifr_flags & IFF_LOOPBACK)) || |
---|
| 540 | ((ifindex == 0 ) && (errno == ENXIO))) { |
---|
| 541 | /* Not a valid interface or loopback interface*/ |
---|
| 542 | continue; |
---|
| 543 | } |
---|
| 544 | |
---|
| 545 | mreq.ipv6mr_interface = ifindex; |
---|
| 546 | inet_pton (AF_INET6, |
---|
| 547 | factory->priv->multicast_address, |
---|
| 548 | &mreq.ipv6mr_multiaddr); |
---|
| 549 | |
---|
| 550 | setsockopt (factory->priv->socket_fd, |
---|
| 551 | IPPROTO_IPV6, |
---|
| 552 | IPV6_JOIN_GROUP, |
---|
| 553 | &mreq, |
---|
| 554 | sizeof (mreq)); |
---|
| 555 | } |
---|
| 556 | } |
---|
| 557 | g_free (buf); |
---|
| 558 | close (socktemp); |
---|
| 559 | } |
---|
| 560 | #endif /* ENABLE_IPV6 */ |
---|
| 561 | } |
---|
| 562 | |
---|
| 563 | static void |
---|
| 564 | fd_set_close_on_exec (int fd) |
---|
| 565 | { |
---|
| 566 | int flags; |
---|
| 567 | |
---|
| 568 | flags = fcntl (fd, F_GETFD, 0); |
---|
| 569 | if (flags < 0) { |
---|
| 570 | return; |
---|
| 571 | } |
---|
| 572 | |
---|
| 573 | flags |= FD_CLOEXEC; |
---|
| 574 | |
---|
| 575 | fcntl (fd, F_SETFD, flags); |
---|
| 576 | } |
---|
| 577 | |
---|
| 578 | static gboolean |
---|
| 579 | open_port (GdmXdmcpDisplayFactory *factory) |
---|
| 580 | { |
---|
| 581 | struct sockaddr_storage serv_sa = { 0 }; |
---|
| 582 | |
---|
| 583 | g_debug ("GdmXdmcpDisplayFactory: Start up on host %s, port %d", |
---|
| 584 | factory->priv->hostname, |
---|
| 585 | factory->priv->port); |
---|
| 586 | |
---|
| 587 | /* Open socket for communications */ |
---|
| 588 | #ifdef ENABLE_IPV6 |
---|
| 589 | factory->priv->socket_fd = do_bind (factory->priv->port, AF_INET6, &serv_sa); |
---|
| 590 | if (factory->priv->socket_fd < 0) |
---|
| 591 | #endif |
---|
| 592 | factory->priv->socket_fd = do_bind (factory->priv->port, AF_INET, &serv_sa); |
---|
| 593 | |
---|
| 594 | if G_UNLIKELY (factory->priv->socket_fd < 0) { |
---|
| 595 | g_warning (_("Could not create socket!")); |
---|
| 596 | return FALSE; |
---|
| 597 | } |
---|
| 598 | |
---|
| 599 | fd_set_close_on_exec (factory->priv->socket_fd); |
---|
| 600 | |
---|
| 601 | if (factory->priv->use_multicast) { |
---|
| 602 | setup_multicast (factory); |
---|
| 603 | } |
---|
| 604 | |
---|
| 605 | return TRUE; |
---|
| 606 | } |
---|
| 607 | |
---|
| 608 | #ifdef HAVE_TCPWRAPPERS |
---|
| 609 | |
---|
| 610 | /* |
---|
| 611 | * Avoids a warning, my tcpd.h file doesn't include this prototype, even |
---|
| 612 | * though the library does include the function and the manpage mentions it |
---|
| 613 | */ |
---|
| 614 | extern int hosts_ctl (char *daemon, |
---|
| 615 | char *client_name, |
---|
| 616 | char *client_addr, |
---|
| 617 | char *client_user); |
---|
| 618 | #endif |
---|
| 619 | |
---|
| 620 | static gboolean |
---|
| 621 | gdm_xdmcp_host_allow (GdmAddress *address) |
---|
| 622 | { |
---|
| 623 | #ifdef HAVE_TCPWRAPPERS |
---|
| 624 | char *client; |
---|
| 625 | char *host; |
---|
| 626 | gboolean ret; |
---|
| 627 | |
---|
| 628 | host = NULL; |
---|
| 629 | client = NULL; |
---|
| 630 | |
---|
| 631 | /* Find client hostname */ |
---|
| 632 | gdm_address_get_hostname (address, &client); |
---|
| 633 | gdm_address_get_numeric_info (address, &host, NULL); |
---|
| 634 | |
---|
| 635 | /* Check with tcp_wrappers if client is allowed to access */ |
---|
| 636 | ret = hosts_ctl ("gdm", client, host, ""); |
---|
| 637 | |
---|
| 638 | g_free (host); |
---|
| 639 | g_free (client); |
---|
| 640 | |
---|
| 641 | return ret; |
---|
| 642 | #else /* HAVE_TCPWRAPPERS */ |
---|
| 643 | return (TRUE); |
---|
| 644 | #endif /* HAVE_TCPWRAPPERS */ |
---|
| 645 | } |
---|
| 646 | |
---|
| 647 | typedef struct { |
---|
| 648 | GdmAddress *address; |
---|
| 649 | int count; |
---|
| 650 | } CountDisplayData; |
---|
| 651 | |
---|
| 652 | static gboolean |
---|
| 653 | count_displays_from_host (const char *id, |
---|
| 654 | GdmDisplay *display, |
---|
| 655 | CountDisplayData *data) |
---|
| 656 | { |
---|
| 657 | GdmAddress *address; |
---|
| 658 | |
---|
| 659 | if (GDM_IS_XDMCP_DISPLAY (display)) { |
---|
| 660 | address = gdm_xdmcp_display_get_remote_address (GDM_XDMCP_DISPLAY (display)); |
---|
| 661 | |
---|
| 662 | if (gdm_address_equal (address, data->address)) { |
---|
| 663 | data->count++; |
---|
| 664 | } |
---|
| 665 | } |
---|
| 666 | |
---|
| 667 | return TRUE; |
---|
| 668 | } |
---|
| 669 | |
---|
| 670 | static int |
---|
| 671 | gdm_xdmcp_num_displays_from_host (GdmXdmcpDisplayFactory *factory, |
---|
| 672 | GdmAddress *address) |
---|
| 673 | { |
---|
| 674 | CountDisplayData data; |
---|
| 675 | GdmDisplayStore *store; |
---|
| 676 | |
---|
| 677 | data.count = 0; |
---|
| 678 | data.address = address; |
---|
| 679 | |
---|
| 680 | store = gdm_display_factory_get_display_store (GDM_DISPLAY_FACTORY (factory)); |
---|
| 681 | gdm_display_store_foreach (store, |
---|
| 682 | (GdmDisplayStoreFunc)count_displays_from_host, |
---|
| 683 | &data); |
---|
| 684 | |
---|
| 685 | return data.count; |
---|
| 686 | } |
---|
| 687 | |
---|
| 688 | typedef struct { |
---|
| 689 | GdmAddress *address; |
---|
| 690 | int display_num; |
---|
| 691 | } LookupHostData; |
---|
| 692 | |
---|
| 693 | static gboolean |
---|
| 694 | lookup_by_host (const char *id, |
---|
| 695 | GdmDisplay *display, |
---|
| 696 | LookupHostData *data) |
---|
| 697 | { |
---|
| 698 | GdmAddress *this_address; |
---|
| 699 | int disp_num; |
---|
| 700 | |
---|
| 701 | if (! GDM_IS_XDMCP_DISPLAY (display)) { |
---|
| 702 | return FALSE; |
---|
| 703 | } |
---|
| 704 | |
---|
| 705 | this_address = gdm_xdmcp_display_get_remote_address (GDM_XDMCP_DISPLAY (display)); |
---|
| 706 | gdm_display_get_x11_display_number (display, &disp_num, NULL); |
---|
| 707 | |
---|
| 708 | if (gdm_address_equal (this_address, data->address) |
---|
| 709 | && disp_num == data->display_num) { |
---|
| 710 | return TRUE; |
---|
| 711 | } |
---|
| 712 | |
---|
| 713 | return FALSE; |
---|
| 714 | } |
---|
| 715 | |
---|
| 716 | static GdmDisplay * |
---|
| 717 | gdm_xdmcp_display_lookup_by_host (GdmXdmcpDisplayFactory *factory, |
---|
| 718 | GdmAddress *address, |
---|
| 719 | int display_num) |
---|
| 720 | { |
---|
| 721 | GdmDisplay *display; |
---|
| 722 | LookupHostData *data; |
---|
| 723 | GdmDisplayStore *store; |
---|
| 724 | |
---|
| 725 | data = g_new0 (LookupHostData, 1); |
---|
| 726 | data->address = address; |
---|
| 727 | data->display_num = display_num; |
---|
| 728 | |
---|
| 729 | store = gdm_display_factory_get_display_store (GDM_DISPLAY_FACTORY (factory)); |
---|
| 730 | display = gdm_display_store_find (store, |
---|
| 731 | (GdmDisplayStoreFunc)lookup_by_host, |
---|
| 732 | data); |
---|
| 733 | g_free (data); |
---|
| 734 | |
---|
| 735 | return display; |
---|
| 736 | } |
---|
| 737 | |
---|
| 738 | static char * |
---|
| 739 | get_willing_output (GdmXdmcpDisplayFactory *factory) |
---|
| 740 | { |
---|
| 741 | char *output; |
---|
| 742 | char **argv; |
---|
| 743 | FILE *fd; |
---|
| 744 | char buf[256]; |
---|
| 745 | |
---|
| 746 | output = NULL; |
---|
| 747 | buf[0] = '\0'; |
---|
| 748 | |
---|
| 749 | if (factory->priv->willing_script == NULL) { |
---|
| 750 | goto out; |
---|
| 751 | } |
---|
| 752 | |
---|
| 753 | argv = NULL; |
---|
| 754 | if (! g_shell_parse_argv (factory->priv->willing_script, NULL, &argv, NULL)) { |
---|
| 755 | goto out; |
---|
| 756 | } |
---|
| 757 | |
---|
| 758 | if (argv == NULL || |
---|
| 759 | argv[0] == NULL || |
---|
| 760 | g_access (argv[0], X_OK) != 0) { |
---|
| 761 | goto out; |
---|
| 762 | } |
---|
| 763 | |
---|
| 764 | fd = popen (factory->priv->willing_script, "r"); |
---|
| 765 | if (fd == NULL) { |
---|
| 766 | goto out; |
---|
| 767 | } |
---|
| 768 | |
---|
| 769 | if (fgets (buf, sizeof (buf), fd) == NULL) { |
---|
| 770 | pclose (fd); |
---|
| 771 | goto out; |
---|
| 772 | } |
---|
| 773 | |
---|
| 774 | pclose (fd); |
---|
| 775 | |
---|
| 776 | output = g_strdup (buf); |
---|
| 777 | |
---|
| 778 | out: |
---|
| 779 | return output; |
---|
| 780 | } |
---|
| 781 | |
---|
| 782 | static void |
---|
| 783 | gdm_xdmcp_send_willing (GdmXdmcpDisplayFactory *factory, |
---|
| 784 | GdmAddress *address) |
---|
| 785 | { |
---|
| 786 | ARRAY8 status; |
---|
| 787 | XdmcpHeader header; |
---|
| 788 | static char *last_status = NULL; |
---|
| 789 | static time_t last_willing = 0; |
---|
| 790 | char *host; |
---|
| 791 | |
---|
| 792 | host = NULL; |
---|
| 793 | gdm_address_get_numeric_info (address, &host, NULL); |
---|
| 794 | g_debug ("GdmXdmcpDisplayFactory: Sending WILLING to %s", host); |
---|
| 795 | g_free (host); |
---|
| 796 | |
---|
| 797 | if (last_willing == 0 || time (NULL) - 3 > last_willing) { |
---|
| 798 | char *s; |
---|
| 799 | |
---|
| 800 | g_free (last_status); |
---|
| 801 | |
---|
| 802 | s = get_willing_output (factory); |
---|
| 803 | if (s != NULL) { |
---|
| 804 | last_status = s; |
---|
| 805 | } else { |
---|
| 806 | last_status = g_strdup (factory->priv->sysid); |
---|
| 807 | } |
---|
| 808 | } |
---|
| 809 | |
---|
| 810 | if (! gdm_address_is_local (address) && |
---|
| 811 | gdm_xdmcp_num_displays_from_host (factory, address) >= factory->priv->max_displays_per_host) { |
---|
| 812 | /* |
---|
| 813 | * Don't translate, this goes over the wire to servers where we |
---|
| 814 | * don't know the charset or language, so it must be ascii |
---|
| 815 | */ |
---|
| 816 | status.data = (CARD8 *) g_strdup_printf ("%s (Server is busy)", |
---|
| 817 | last_status); |
---|
| 818 | } else { |
---|
| 819 | status.data = (CARD8 *) g_strdup (last_status); |
---|
| 820 | } |
---|
| 821 | |
---|
| 822 | status.length = strlen ((char *) status.data); |
---|
| 823 | |
---|
| 824 | header.opcode = (CARD16) WILLING; |
---|
| 825 | header.length = 6 + serv_authlist.authentication.length; |
---|
| 826 | header.length += factory->priv->servhost.length + status.length; |
---|
| 827 | header.version = XDM_PROTOCOL_VERSION; |
---|
| 828 | XdmcpWriteHeader (&factory->priv->buf, &header); |
---|
| 829 | |
---|
| 830 | /* Hardcoded authentication */ |
---|
| 831 | XdmcpWriteARRAY8 (&factory->priv->buf, &serv_authlist.authentication); |
---|
| 832 | XdmcpWriteARRAY8 (&factory->priv->buf, &factory->priv->servhost); |
---|
| 833 | XdmcpWriteARRAY8 (&factory->priv->buf, &status); |
---|
| 834 | |
---|
| 835 | XdmcpFlush (factory->priv->socket_fd, |
---|
| 836 | &factory->priv->buf, |
---|
| 837 | (XdmcpNetaddr)gdm_address_peek_sockaddr_storage (address), |
---|
| 838 | (int)sizeof (struct sockaddr_storage)); |
---|
| 839 | |
---|
| 840 | g_free (status.data); |
---|
| 841 | } |
---|
| 842 | |
---|
| 843 | static void |
---|
| 844 | gdm_xdmcp_send_unwilling (GdmXdmcpDisplayFactory *factory, |
---|
| 845 | GdmAddress *address, |
---|
| 846 | int type) |
---|
| 847 | { |
---|
| 848 | ARRAY8 status; |
---|
| 849 | XdmcpHeader header; |
---|
| 850 | static time_t last_time = 0; |
---|
| 851 | char *host; |
---|
| 852 | |
---|
| 853 | /* only send at most one packet per second, |
---|
| 854 | no harm done if we don't send it at all */ |
---|
| 855 | if (last_time + 1 >= time (NULL)) { |
---|
| 856 | return; |
---|
| 857 | } |
---|
| 858 | |
---|
| 859 | host = NULL; |
---|
| 860 | gdm_address_get_numeric_info (address, &host, NULL); |
---|
| 861 | g_debug ("GdmXdmcpDisplayFactory: Sending UNWILLING to %s", host); |
---|
| 862 | g_warning (_("Denied XDMCP query from host %s"), host); |
---|
| 863 | g_free (host); |
---|
| 864 | |
---|
| 865 | /* |
---|
| 866 | * Don't translate, this goes over the wire to servers where we |
---|
| 867 | * don't know the charset or language, so it must be ascii |
---|
| 868 | */ |
---|
| 869 | status.data = (CARD8 *) "Display not authorized to connect"; |
---|
| 870 | status.length = strlen ((char *) status.data); |
---|
| 871 | |
---|
| 872 | header.opcode = (CARD16) UNWILLING; |
---|
| 873 | header.length = 4 + factory->priv->servhost.length + status.length; |
---|
| 874 | header.version = XDM_PROTOCOL_VERSION; |
---|
| 875 | XdmcpWriteHeader (&factory->priv->buf, &header); |
---|
| 876 | |
---|
| 877 | XdmcpWriteARRAY8 (&factory->priv->buf, &factory->priv->servhost); |
---|
| 878 | XdmcpWriteARRAY8 (&factory->priv->buf, &status); |
---|
| 879 | XdmcpFlush (factory->priv->socket_fd, |
---|
| 880 | &factory->priv->buf, |
---|
| 881 | (XdmcpNetaddr)gdm_address_peek_sockaddr_storage (address), |
---|
| 882 | (int)sizeof (struct sockaddr_storage)); |
---|
| 883 | |
---|
| 884 | last_time = time (NULL); |
---|
| 885 | } |
---|
| 886 | |
---|
| 887 | #define SIN(__s) ((struct sockaddr_in *) __s) |
---|
| 888 | #define SIN6(__s) ((struct sockaddr_in6 *) __s) |
---|
| 889 | |
---|
| 890 | static void |
---|
| 891 | set_port_for_request (GdmAddress *address, |
---|
| 892 | ARRAY8 *port) |
---|
| 893 | { |
---|
| 894 | struct sockaddr_storage *ss; |
---|
| 895 | |
---|
| 896 | ss = gdm_address_peek_sockaddr_storage (address); |
---|
| 897 | |
---|
| 898 | /* we depend on this being 2 elsewhere as well */ |
---|
| 899 | port->length = 2; |
---|
| 900 | |
---|
| 901 | switch (ss->ss_family) { |
---|
| 902 | case AF_INET: |
---|
| 903 | port->data = (CARD8 *)g_memdup (&(SIN (ss)->sin_port), port->length); |
---|
| 904 | break; |
---|
| 905 | case AF_INET6: |
---|
| 906 | port->data = (CARD8 *)g_memdup (&(SIN6 (ss)->sin6_port), port->length); |
---|
| 907 | break; |
---|
| 908 | default: |
---|
| 909 | port->data = NULL; |
---|
| 910 | break; |
---|
| 911 | } |
---|
| 912 | } |
---|
| 913 | |
---|
| 914 | static void |
---|
| 915 | set_address_for_request (GdmAddress *address, |
---|
| 916 | ARRAY8 *addr) |
---|
| 917 | { |
---|
| 918 | struct sockaddr_storage *ss; |
---|
| 919 | |
---|
| 920 | ss = gdm_address_peek_sockaddr_storage (address); |
---|
| 921 | |
---|
| 922 | switch (ss->ss_family) { |
---|
| 923 | case AF_INET: |
---|
| 924 | addr->length = sizeof (struct in_addr); |
---|
| 925 | addr->data = g_memdup (&SIN (ss)->sin_addr, addr->length); |
---|
| 926 | break; |
---|
| 927 | case AF_INET6: |
---|
| 928 | addr->length = sizeof (struct in6_addr); |
---|
| 929 | addr->data = g_memdup (&SIN6 (ss)->sin6_addr, addr->length); |
---|
| 930 | break; |
---|
| 931 | default: |
---|
| 932 | addr->length = 0; |
---|
| 933 | addr->data = NULL; |
---|
| 934 | break; |
---|
| 935 | } |
---|
| 936 | |
---|
| 937 | } |
---|
| 938 | |
---|
| 939 | static void |
---|
| 940 | gdm_xdmcp_send_forward_query (GdmXdmcpDisplayFactory *factory, |
---|
| 941 | IndirectClient *ic, |
---|
| 942 | GdmAddress *address, |
---|
| 943 | GdmAddress *display_address, |
---|
| 944 | ARRAYofARRAY8Ptr authlist) |
---|
| 945 | { |
---|
| 946 | XdmcpHeader header; |
---|
| 947 | int i; |
---|
| 948 | ARRAY8 addr; |
---|
| 949 | ARRAY8 port; |
---|
| 950 | char *host; |
---|
| 951 | char *serv; |
---|
| 952 | |
---|
| 953 | g_assert (ic != NULL); |
---|
| 954 | g_assert (ic->chosen_address != NULL); |
---|
| 955 | |
---|
| 956 | host = NULL; |
---|
| 957 | gdm_address_get_numeric_info (ic->chosen_address, &host, NULL); |
---|
| 958 | g_debug ("GdmXdmcpDisplayFactory: Sending forward query to %s", |
---|
| 959 | host); |
---|
| 960 | g_free (host); |
---|
| 961 | |
---|
| 962 | host = NULL; |
---|
| 963 | serv = NULL; |
---|
| 964 | gdm_address_get_numeric_info (display_address, &host, &serv); |
---|
| 965 | g_debug ("GdmXdmcpDisplayFactory: Query contains %s:%s", |
---|
| 966 | host, serv); |
---|
| 967 | g_free (host); |
---|
| 968 | g_free (serv); |
---|
| 969 | |
---|
| 970 | set_port_for_request (address, &port); |
---|
| 971 | set_address_for_request (display_address, &addr); |
---|
| 972 | |
---|
| 973 | header.version = XDM_PROTOCOL_VERSION; |
---|
| 974 | header.opcode = (CARD16) FORWARD_QUERY; |
---|
| 975 | header.length = 0; |
---|
| 976 | header.length += 2 + addr.length; |
---|
| 977 | header.length += 2 + port.length; |
---|
| 978 | header.length += 1; |
---|
| 979 | for (i = 0; i < authlist->length; i++) { |
---|
| 980 | header.length += 2 + authlist->data[i].length; |
---|
| 981 | } |
---|
| 982 | |
---|
| 983 | XdmcpWriteHeader (&factory->priv->buf, &header); |
---|
| 984 | XdmcpWriteARRAY8 (&factory->priv->buf, &addr); |
---|
| 985 | XdmcpWriteARRAY8 (&factory->priv->buf, &port); |
---|
| 986 | XdmcpWriteARRAYofARRAY8 (&factory->priv->buf, authlist); |
---|
| 987 | |
---|
| 988 | XdmcpFlush (factory->priv->socket_fd, |
---|
| 989 | &factory->priv->buf, |
---|
| 990 | (XdmcpNetaddr)gdm_address_peek_sockaddr_storage (ic->chosen_address), |
---|
| 991 | (int)sizeof (struct sockaddr_storage)); |
---|
| 992 | |
---|
| 993 | g_free (port.data); |
---|
| 994 | g_free (addr.data); |
---|
| 995 | } |
---|
| 996 | |
---|
| 997 | static void |
---|
| 998 | handle_any_query (GdmXdmcpDisplayFactory *factory, |
---|
| 999 | GdmAddress *address, |
---|
| 1000 | ARRAYofARRAY8Ptr authentication_names, |
---|
| 1001 | int type) |
---|
| 1002 | { |
---|
| 1003 | gdm_xdmcp_send_willing (factory, address); |
---|
| 1004 | } |
---|
| 1005 | |
---|
| 1006 | static void |
---|
| 1007 | handle_direct_query (GdmXdmcpDisplayFactory *factory, |
---|
| 1008 | GdmAddress *address, |
---|
| 1009 | int len, |
---|
| 1010 | int type) |
---|
| 1011 | { |
---|
| 1012 | ARRAYofARRAY8 clnt_authlist; |
---|
| 1013 | int expected_len; |
---|
| 1014 | int i; |
---|
| 1015 | int res; |
---|
| 1016 | |
---|
| 1017 | res = XdmcpReadARRAYofARRAY8 (&factory->priv->buf, &clnt_authlist); |
---|
| 1018 | if G_UNLIKELY (! res) { |
---|
| 1019 | g_warning (_("Could not extract authlist from packet")); |
---|
| 1020 | return; |
---|
| 1021 | } |
---|
| 1022 | |
---|
| 1023 | expected_len = 1; |
---|
| 1024 | |
---|
| 1025 | for (i = 0 ; i < clnt_authlist.length ; i++) { |
---|
| 1026 | expected_len += 2 + clnt_authlist.data[i].length; |
---|
| 1027 | } |
---|
| 1028 | |
---|
| 1029 | if (len == expected_len) { |
---|
| 1030 | handle_any_query (factory, address, &clnt_authlist, type); |
---|
| 1031 | } else { |
---|
| 1032 | g_warning (_("Error in checksum")); |
---|
| 1033 | } |
---|
| 1034 | |
---|
| 1035 | XdmcpDisposeARRAYofARRAY8 (&clnt_authlist); |
---|
| 1036 | } |
---|
| 1037 | |
---|
| 1038 | static void |
---|
| 1039 | gdm_xdmcp_handle_broadcast_query (GdmXdmcpDisplayFactory *factory, |
---|
| 1040 | GdmAddress *address, |
---|
| 1041 | int len) |
---|
| 1042 | { |
---|
| 1043 | if (gdm_xdmcp_host_allow (address)) { |
---|
| 1044 | handle_direct_query (factory, address, len, BROADCAST_QUERY); |
---|
| 1045 | } else { |
---|
| 1046 | /* just ignore it */ |
---|
| 1047 | } |
---|
| 1048 | } |
---|
| 1049 | |
---|
| 1050 | static void |
---|
| 1051 | gdm_xdmcp_handle_query (GdmXdmcpDisplayFactory *factory, |
---|
| 1052 | GdmAddress *address, |
---|
| 1053 | int len) |
---|
| 1054 | { |
---|
| 1055 | if (gdm_xdmcp_host_allow (address)) { |
---|
| 1056 | handle_direct_query (factory, address, len, QUERY); |
---|
| 1057 | } else { |
---|
| 1058 | gdm_xdmcp_send_unwilling (factory, address, QUERY); |
---|
| 1059 | } |
---|
| 1060 | } |
---|
| 1061 | |
---|
| 1062 | static IndirectClient * |
---|
| 1063 | indirect_client_create (GdmXdmcpDisplayFactory *factory, |
---|
| 1064 | GdmAddress *dsp_address) |
---|
| 1065 | { |
---|
| 1066 | IndirectClient *ic; |
---|
| 1067 | |
---|
| 1068 | ic = g_new0 (IndirectClient, 1); |
---|
| 1069 | ic->dsp_address = gdm_address_copy (dsp_address); |
---|
| 1070 | |
---|
| 1071 | factory->priv->indirect_clients = g_slist_prepend (factory->priv->indirect_clients, ic); |
---|
| 1072 | |
---|
| 1073 | return ic; |
---|
| 1074 | } |
---|
| 1075 | |
---|
| 1076 | static void |
---|
| 1077 | indirect_client_destroy (GdmXdmcpDisplayFactory *factory, |
---|
| 1078 | IndirectClient *ic) |
---|
| 1079 | { |
---|
| 1080 | if (ic == NULL) { |
---|
| 1081 | return; |
---|
| 1082 | } |
---|
| 1083 | |
---|
| 1084 | factory->priv->indirect_clients = g_slist_remove (factory->priv->indirect_clients, ic); |
---|
| 1085 | |
---|
| 1086 | ic->acctime = 0; |
---|
| 1087 | |
---|
| 1088 | { |
---|
| 1089 | char *host; |
---|
| 1090 | |
---|
| 1091 | host = NULL; |
---|
| 1092 | gdm_address_get_numeric_info (ic->dsp_address, &host, NULL); |
---|
| 1093 | g_debug ("GdmXdmcpDisplayFactory: Disposing IndirectClient for %s", host); |
---|
| 1094 | g_free (host); |
---|
| 1095 | } |
---|
| 1096 | |
---|
| 1097 | g_free (ic->dsp_address); |
---|
| 1098 | ic->dsp_address = NULL; |
---|
| 1099 | g_free (ic->chosen_address); |
---|
| 1100 | ic->chosen_address = NULL; |
---|
| 1101 | |
---|
| 1102 | g_free (ic); |
---|
| 1103 | } |
---|
| 1104 | |
---|
| 1105 | static IndirectClient * |
---|
| 1106 | indirect_client_lookup_by_chosen (GdmXdmcpDisplayFactory *factory, |
---|
| 1107 | GdmAddress *chosen_address, |
---|
| 1108 | GdmAddress *origin_address) |
---|
| 1109 | { |
---|
| 1110 | GSList *li; |
---|
| 1111 | char *host; |
---|
| 1112 | IndirectClient *ret; |
---|
| 1113 | |
---|
| 1114 | g_assert (chosen_address != NULL); |
---|
| 1115 | g_assert (origin_address != NULL); |
---|
| 1116 | |
---|
| 1117 | ret = NULL; |
---|
| 1118 | |
---|
| 1119 | for (li = factory->priv->indirect_clients; li != NULL; li = li->next) { |
---|
| 1120 | IndirectClient *ic = li->data; |
---|
| 1121 | |
---|
| 1122 | if (ic != NULL |
---|
| 1123 | && ic->chosen_address != NULL |
---|
| 1124 | && gdm_address_equal (ic->chosen_address, chosen_address)) { |
---|
| 1125 | if (gdm_address_equal (ic->dsp_address, origin_address)) { |
---|
| 1126 | ret = ic; |
---|
| 1127 | goto out; |
---|
| 1128 | } else if (gdm_address_is_loopback (ic->dsp_address) |
---|
| 1129 | && gdm_address_is_local (origin_address)) { |
---|
| 1130 | ret = ic; |
---|
| 1131 | goto out; |
---|
| 1132 | } |
---|
| 1133 | } |
---|
| 1134 | } |
---|
| 1135 | |
---|
| 1136 | gdm_address_get_numeric_info (chosen_address, &host, NULL); |
---|
| 1137 | |
---|
| 1138 | g_debug ("GdmXdmcpDisplayFactory: Chosen %s host not found", host); |
---|
| 1139 | g_free (host); |
---|
| 1140 | out: |
---|
| 1141 | return ret; |
---|
| 1142 | } |
---|
| 1143 | |
---|
| 1144 | /* lookup by origin */ |
---|
| 1145 | static IndirectClient * |
---|
| 1146 | indirect_client_lookup (GdmXdmcpDisplayFactory *factory, |
---|
| 1147 | GdmAddress *address) |
---|
| 1148 | { |
---|
| 1149 | GSList *li; |
---|
| 1150 | GSList *qlist; |
---|
| 1151 | IndirectClient *ret; |
---|
| 1152 | time_t curtime; |
---|
| 1153 | |
---|
| 1154 | g_assert (address != NULL); |
---|
| 1155 | |
---|
| 1156 | curtime = time (NULL); |
---|
| 1157 | ret = NULL; |
---|
| 1158 | |
---|
| 1159 | qlist = g_slist_copy (factory->priv->indirect_clients); |
---|
| 1160 | |
---|
| 1161 | for (li = qlist; li != NULL; li = li->next) { |
---|
| 1162 | IndirectClient *ic; |
---|
| 1163 | char *host; |
---|
| 1164 | char *serv; |
---|
| 1165 | |
---|
| 1166 | ic = (IndirectClient *) li->data; |
---|
| 1167 | |
---|
| 1168 | if (ic == NULL) { |
---|
| 1169 | continue; |
---|
| 1170 | } |
---|
| 1171 | |
---|
| 1172 | host = NULL; |
---|
| 1173 | serv = NULL; |
---|
| 1174 | gdm_address_get_numeric_info (ic->dsp_address, &host, &serv); |
---|
| 1175 | |
---|
| 1176 | g_debug ("GdmXdmcpDisplayFactory: comparing %s:%s", host, serv); |
---|
| 1177 | if (gdm_address_equal (ic->dsp_address, address)) { |
---|
| 1178 | ret = ic; |
---|
| 1179 | g_free (host); |
---|
| 1180 | g_free (serv); |
---|
| 1181 | break; |
---|
| 1182 | } |
---|
| 1183 | |
---|
| 1184 | if (ic->acctime > 0 && curtime > ic->acctime + factory->priv->max_wait_indirect) { |
---|
| 1185 | g_debug ("GdmXdmcpDisplayFactory: Disposing stale forward query from %s:%s", |
---|
| 1186 | host, serv); |
---|
| 1187 | |
---|
| 1188 | indirect_client_destroy (factory, ic); |
---|
| 1189 | } |
---|
| 1190 | |
---|
| 1191 | g_free (host); |
---|
| 1192 | g_free (serv); |
---|
| 1193 | } |
---|
| 1194 | |
---|
| 1195 | g_slist_free (qlist); |
---|
| 1196 | |
---|
| 1197 | if (ret == NULL) { |
---|
| 1198 | char *host; |
---|
| 1199 | |
---|
| 1200 | host = NULL; |
---|
| 1201 | gdm_address_get_numeric_info (address, &host, NULL); |
---|
| 1202 | g_debug ("GdmXdmcpDisplayFactory: Host %s not found", |
---|
| 1203 | host); |
---|
| 1204 | g_free (host); |
---|
| 1205 | } |
---|
| 1206 | |
---|
| 1207 | return ret; |
---|
| 1208 | } |
---|
| 1209 | |
---|
| 1210 | static void |
---|
| 1211 | gdm_xdmcp_handle_indirect_query (GdmXdmcpDisplayFactory *factory, |
---|
| 1212 | GdmAddress *address, |
---|
| 1213 | int len) |
---|
| 1214 | { |
---|
| 1215 | ARRAYofARRAY8 clnt_authlist; |
---|
| 1216 | int expected_len; |
---|
| 1217 | int i; |
---|
| 1218 | int res; |
---|
| 1219 | IndirectClient *ic; |
---|
| 1220 | |
---|
| 1221 | if (! gdm_xdmcp_host_allow (address)) { |
---|
| 1222 | /* ignore the request */ |
---|
| 1223 | return; |
---|
| 1224 | } |
---|
| 1225 | |
---|
| 1226 | if (! factory->priv->honor_indirect) { |
---|
| 1227 | /* ignore it */ |
---|
| 1228 | return; |
---|
| 1229 | } |
---|
| 1230 | |
---|
| 1231 | if (factory->priv->num_sessions > factory->priv->max_displays || |
---|
| 1232 | (!gdm_address_is_local (address) && |
---|
| 1233 | gdm_xdmcp_num_displays_from_host (factory, address) > factory->priv->max_displays_per_host)) { |
---|
| 1234 | g_debug ("GdmXdmcpDisplayFactory: reached maximum number of clients - ignoring indirect query"); |
---|
| 1235 | return; |
---|
| 1236 | } |
---|
| 1237 | |
---|
| 1238 | res = XdmcpReadARRAYofARRAY8 (&factory->priv->buf, &clnt_authlist); |
---|
| 1239 | if G_UNLIKELY (! res) { |
---|
| 1240 | g_warning (_("Could not extract authlist from packet")); |
---|
| 1241 | return; |
---|
| 1242 | } |
---|
| 1243 | |
---|
| 1244 | expected_len = 1; |
---|
| 1245 | |
---|
| 1246 | for (i = 0 ; i < clnt_authlist.length ; i++) { |
---|
| 1247 | expected_len += 2 + clnt_authlist.data[i].length; |
---|
| 1248 | } |
---|
| 1249 | |
---|
| 1250 | /* Try to look up the display in |
---|
| 1251 | * the pending list. If found send a FORWARD_QUERY to the |
---|
| 1252 | * chosen manager. Otherwise alloc a new indirect display. */ |
---|
| 1253 | |
---|
| 1254 | if (len != expected_len) { |
---|
| 1255 | g_warning (_("Error in checksum")); |
---|
| 1256 | goto out; |
---|
| 1257 | } |
---|
| 1258 | |
---|
| 1259 | |
---|
| 1260 | ic = indirect_client_lookup (factory, address); |
---|
| 1261 | |
---|
| 1262 | if (ic != NULL && ic->chosen_address != NULL) { |
---|
| 1263 | /* if user chose us, then just send willing */ |
---|
| 1264 | if (gdm_address_is_local (ic->chosen_address)) { |
---|
| 1265 | g_debug ("GdmXdmcpDisplayFactory: the chosen address is local - dropping indirect"); |
---|
| 1266 | |
---|
| 1267 | /* get rid of indirect, so that we don't get |
---|
| 1268 | * the chooser */ |
---|
| 1269 | indirect_client_destroy (factory, ic); |
---|
| 1270 | gdm_xdmcp_send_willing (factory, address); |
---|
| 1271 | } else if (gdm_address_is_loopback (address)) { |
---|
| 1272 | /* woohoo! fun, I have no clue how to get |
---|
| 1273 | * the correct ip, SO I just send forward |
---|
| 1274 | * queries with all the different IPs */ |
---|
| 1275 | const GList *list = gdm_address_peek_local_list (); |
---|
| 1276 | |
---|
| 1277 | g_debug ("GdmXdmcpDisplayFactory: the chosen address is a loopback"); |
---|
| 1278 | |
---|
| 1279 | while (list != NULL) { |
---|
| 1280 | GdmAddress *saddr = list->data; |
---|
| 1281 | |
---|
| 1282 | if (! gdm_address_is_loopback (saddr)) { |
---|
| 1283 | /* forward query to * chosen host */ |
---|
| 1284 | gdm_xdmcp_send_forward_query (factory, |
---|
| 1285 | ic, |
---|
| 1286 | address, |
---|
| 1287 | saddr, |
---|
| 1288 | &clnt_authlist); |
---|
| 1289 | } |
---|
| 1290 | |
---|
| 1291 | list = list->next; |
---|
| 1292 | } |
---|
| 1293 | } else { |
---|
| 1294 | /* or send forward query to chosen host */ |
---|
| 1295 | gdm_xdmcp_send_forward_query (factory, |
---|
| 1296 | ic, |
---|
| 1297 | address, |
---|
| 1298 | address, |
---|
| 1299 | &clnt_authlist); |
---|
| 1300 | } |
---|
| 1301 | } else if (ic == NULL) { |
---|
| 1302 | ic = indirect_client_create (factory, address); |
---|
| 1303 | if (ic != NULL) { |
---|
| 1304 | gdm_xdmcp_send_willing (factory, address); |
---|
| 1305 | } |
---|
| 1306 | } else { |
---|
| 1307 | gdm_xdmcp_send_willing (factory, address); |
---|
| 1308 | } |
---|
| 1309 | |
---|
| 1310 | out: |
---|
| 1311 | XdmcpDisposeARRAYofARRAY8 (&clnt_authlist); |
---|
| 1312 | } |
---|
| 1313 | |
---|
| 1314 | static void |
---|
| 1315 | forward_query_destroy (GdmXdmcpDisplayFactory *factory, |
---|
| 1316 | ForwardQuery *q) |
---|
| 1317 | { |
---|
| 1318 | if (q == NULL) { |
---|
| 1319 | return; |
---|
| 1320 | } |
---|
| 1321 | |
---|
| 1322 | factory->priv->forward_queries = g_slist_remove (factory->priv->forward_queries, q); |
---|
| 1323 | |
---|
| 1324 | q->acctime = 0; |
---|
| 1325 | |
---|
| 1326 | { |
---|
| 1327 | char *host; |
---|
| 1328 | |
---|
| 1329 | host = NULL; |
---|
| 1330 | gdm_address_get_numeric_info (q->dsp_address, &host, NULL); |
---|
| 1331 | g_debug ("GdmXdmcpDisplayFactory: Disposing %s", host); |
---|
| 1332 | g_free (host); |
---|
| 1333 | } |
---|
| 1334 | |
---|
| 1335 | g_free (q->dsp_address); |
---|
| 1336 | q->dsp_address = NULL; |
---|
| 1337 | g_free (q->from_address); |
---|
| 1338 | q->from_address = NULL; |
---|
| 1339 | |
---|
| 1340 | g_free (q); |
---|
| 1341 | } |
---|
| 1342 | |
---|
| 1343 | static gboolean |
---|
| 1344 | remove_oldest_forward (GdmXdmcpDisplayFactory *factory) |
---|
| 1345 | { |
---|
| 1346 | GSList *li; |
---|
| 1347 | ForwardQuery *oldest = NULL; |
---|
| 1348 | |
---|
| 1349 | for (li = factory->priv->forward_queries; li != NULL; li = li->next) { |
---|
| 1350 | ForwardQuery *query = li->data; |
---|
| 1351 | |
---|
| 1352 | if (oldest == NULL || query->acctime < oldest->acctime) { |
---|
| 1353 | oldest = query; |
---|
| 1354 | } |
---|
| 1355 | } |
---|
| 1356 | |
---|
| 1357 | if (oldest != NULL) { |
---|
| 1358 | forward_query_destroy (factory, oldest); |
---|
| 1359 | return TRUE; |
---|
| 1360 | } else { |
---|
| 1361 | return FALSE; |
---|
| 1362 | } |
---|
| 1363 | } |
---|
| 1364 | |
---|
| 1365 | static ForwardQuery * |
---|
| 1366 | forward_query_create (GdmXdmcpDisplayFactory *factory, |
---|
| 1367 | GdmAddress *mgr_address, |
---|
| 1368 | GdmAddress *dsp_address) |
---|
| 1369 | { |
---|
| 1370 | ForwardQuery *q; |
---|
| 1371 | int count; |
---|
| 1372 | |
---|
| 1373 | count = g_slist_length (factory->priv->forward_queries); |
---|
| 1374 | |
---|
| 1375 | while (count > GDM_MAX_FORWARD_QUERIES && remove_oldest_forward (factory)) { |
---|
| 1376 | count--; |
---|
| 1377 | } |
---|
| 1378 | |
---|
| 1379 | q = g_new0 (ForwardQuery, 1); |
---|
| 1380 | q->dsp_address = gdm_address_copy (dsp_address); |
---|
| 1381 | q->from_address = gdm_address_copy (mgr_address); |
---|
| 1382 | |
---|
| 1383 | factory->priv->forward_queries = g_slist_prepend (factory->priv->forward_queries, q); |
---|
| 1384 | |
---|
| 1385 | return q; |
---|
| 1386 | } |
---|
| 1387 | |
---|
| 1388 | static ForwardQuery * |
---|
| 1389 | forward_query_lookup (GdmXdmcpDisplayFactory *factory, |
---|
| 1390 | GdmAddress *address) |
---|
| 1391 | { |
---|
| 1392 | GSList *li; |
---|
| 1393 | GSList *qlist; |
---|
| 1394 | ForwardQuery *ret; |
---|
| 1395 | time_t curtime; |
---|
| 1396 | |
---|
| 1397 | curtime = time (NULL); |
---|
| 1398 | ret = NULL; |
---|
| 1399 | |
---|
| 1400 | qlist = g_slist_copy (factory->priv->forward_queries); |
---|
| 1401 | |
---|
| 1402 | for (li = qlist; li != NULL; li = li->next) { |
---|
| 1403 | ForwardQuery *q; |
---|
| 1404 | char *host; |
---|
| 1405 | char *serv; |
---|
| 1406 | |
---|
| 1407 | q = (ForwardQuery *) li->data; |
---|
| 1408 | |
---|
| 1409 | if (q == NULL) { |
---|
| 1410 | continue; |
---|
| 1411 | } |
---|
| 1412 | |
---|
| 1413 | host = NULL; |
---|
| 1414 | serv = NULL; |
---|
| 1415 | gdm_address_get_numeric_info (q->dsp_address, &host, &serv); |
---|
| 1416 | |
---|
| 1417 | g_debug ("GdmXdmcpDisplayFactory: comparing %s:%s", host, serv); |
---|
| 1418 | if (gdm_address_equal (q->dsp_address, address)) { |
---|
| 1419 | ret = q; |
---|
| 1420 | g_free (host); |
---|
| 1421 | g_free (serv); |
---|
| 1422 | break; |
---|
| 1423 | } |
---|
| 1424 | |
---|
| 1425 | if (q->acctime > 0 && curtime > q->acctime + GDM_FORWARD_QUERY_TIMEOUT) { |
---|
| 1426 | g_debug ("GdmXdmcpDisplayFactory: Disposing stale forward query from %s:%s", |
---|
| 1427 | host, serv); |
---|
| 1428 | |
---|
| 1429 | forward_query_destroy (factory, q); |
---|
| 1430 | } |
---|
| 1431 | |
---|
| 1432 | g_free (host); |
---|
| 1433 | g_free (serv); |
---|
| 1434 | } |
---|
| 1435 | |
---|
| 1436 | g_slist_free (qlist); |
---|
| 1437 | |
---|
| 1438 | if (ret == NULL) { |
---|
| 1439 | char *host; |
---|
| 1440 | |
---|
| 1441 | host = NULL; |
---|
| 1442 | gdm_address_get_numeric_info (address, &host, NULL); |
---|
| 1443 | g_debug ("GdmXdmcpDisplayFactory: Host %s not found", |
---|
| 1444 | host); |
---|
| 1445 | g_free (host); |
---|
| 1446 | } |
---|
| 1447 | |
---|
| 1448 | return ret; |
---|
| 1449 | } |
---|
| 1450 | |
---|
| 1451 | static gboolean |
---|
| 1452 | create_address_from_request (ARRAY8 *req_addr, |
---|
| 1453 | ARRAY8 *req_port, |
---|
| 1454 | int family, |
---|
| 1455 | GdmAddress **address) |
---|
| 1456 | { |
---|
| 1457 | uint16_t port; |
---|
| 1458 | char host_buf [NI_MAXHOST]; |
---|
| 1459 | char serv_buf [NI_MAXSERV]; |
---|
| 1460 | char *serv; |
---|
| 1461 | const char *host; |
---|
| 1462 | struct addrinfo hints; |
---|
| 1463 | struct addrinfo *ai_list; |
---|
| 1464 | struct addrinfo *ai; |
---|
| 1465 | int gaierr; |
---|
| 1466 | gboolean found; |
---|
| 1467 | |
---|
| 1468 | if (address != NULL) { |
---|
| 1469 | *address = NULL; |
---|
| 1470 | } |
---|
| 1471 | |
---|
| 1472 | if (req_addr == NULL) { |
---|
| 1473 | return FALSE; |
---|
| 1474 | } |
---|
| 1475 | |
---|
| 1476 | serv = NULL; |
---|
| 1477 | if (req_port != NULL) { |
---|
| 1478 | /* port must always be length 2 */ |
---|
| 1479 | if (req_port->length != 2) { |
---|
| 1480 | return FALSE; |
---|
| 1481 | } |
---|
| 1482 | |
---|
| 1483 | memcpy (&port, req_port->data, 2); |
---|
| 1484 | snprintf (serv_buf, sizeof (serv_buf), "%d", ntohs (port)); |
---|
| 1485 | serv = serv_buf; |
---|
| 1486 | } else { |
---|
| 1487 | /* assume XDM_UDP_PORT */ |
---|
| 1488 | snprintf (serv_buf, sizeof (serv_buf), "%d", XDM_UDP_PORT); |
---|
| 1489 | serv = serv_buf; |
---|
| 1490 | } |
---|
| 1491 | |
---|
| 1492 | host = NULL; |
---|
| 1493 | if (req_addr->length == 4) { |
---|
| 1494 | host = inet_ntop (AF_INET, |
---|
| 1495 | (const void *)req_addr->data, |
---|
| 1496 | host_buf, |
---|
| 1497 | sizeof (host_buf)); |
---|
| 1498 | } else if (req_addr->length == 16) { |
---|
| 1499 | host = inet_ntop (AF_INET6, |
---|
| 1500 | (const void *)req_addr->data, |
---|
| 1501 | host_buf, |
---|
| 1502 | sizeof (host_buf)); |
---|
| 1503 | } |
---|
| 1504 | |
---|
| 1505 | if (host == NULL) { |
---|
| 1506 | g_warning (_("Bad address")); |
---|
| 1507 | return FALSE; |
---|
| 1508 | } |
---|
| 1509 | |
---|
| 1510 | memset (&hints, 0, sizeof (hints)); |
---|
| 1511 | hints.ai_family = family; |
---|
| 1512 | hints.ai_flags = AI_V4MAPPED; /* this should convert IPv4 address to IPv6 if needed */ |
---|
| 1513 | if ((gaierr = getaddrinfo (host, serv, &hints, &ai_list)) != 0) { |
---|
| 1514 | g_warning ("Unable get address: %s", gai_strerror (gaierr)); |
---|
| 1515 | return FALSE; |
---|
| 1516 | } |
---|
| 1517 | |
---|
| 1518 | /* just take the first one */ |
---|
| 1519 | ai = ai_list; |
---|
| 1520 | |
---|
| 1521 | found = FALSE; |
---|
| 1522 | if (ai != NULL) { |
---|
| 1523 | found = TRUE; |
---|
| 1524 | if (address != NULL) { |
---|
| 1525 | *address = gdm_address_new_from_sockaddr (ai->ai_addr, ai->ai_addrlen); |
---|
| 1526 | } |
---|
| 1527 | } |
---|
| 1528 | |
---|
| 1529 | freeaddrinfo (ai_list); |
---|
| 1530 | |
---|
| 1531 | return found; |
---|
| 1532 | } |
---|
| 1533 | |
---|
| 1534 | static void |
---|
| 1535 | gdm_xdmcp_whack_queued_managed_forwards (GdmXdmcpDisplayFactory *factory, |
---|
| 1536 | GdmAddress *address, |
---|
| 1537 | GdmAddress *origin) |
---|
| 1538 | { |
---|
| 1539 | GSList *li; |
---|
| 1540 | |
---|
| 1541 | for (li = factory->priv->managed_forwards; li != NULL; li = li->next) { |
---|
| 1542 | ManagedForward *mf = li->data; |
---|
| 1543 | |
---|
| 1544 | if (gdm_address_equal (mf->manager, address) && |
---|
| 1545 | gdm_address_equal (mf->origin, origin)) { |
---|
| 1546 | factory->priv->managed_forwards = g_slist_remove_link (factory->priv->managed_forwards, li); |
---|
| 1547 | g_slist_free_1 (li); |
---|
| 1548 | g_source_remove (mf->handler); |
---|
| 1549 | /* mf freed by glib */ |
---|
| 1550 | return; |
---|
| 1551 | } |
---|
| 1552 | } |
---|
| 1553 | } |
---|
| 1554 | |
---|
| 1555 | static void |
---|
| 1556 | gdm_xdmcp_handle_forward_query (GdmXdmcpDisplayFactory *factory, |
---|
| 1557 | GdmAddress *address, |
---|
| 1558 | int len) |
---|
| 1559 | { |
---|
| 1560 | ARRAY8 clnt_addr; |
---|
| 1561 | ARRAY8 clnt_port; |
---|
| 1562 | ARRAYofARRAY8 clnt_authlist; |
---|
| 1563 | int i; |
---|
| 1564 | int explen; |
---|
| 1565 | GdmAddress *disp_address; |
---|
| 1566 | char *host; |
---|
| 1567 | char *serv; |
---|
| 1568 | |
---|
| 1569 | disp_address = NULL; |
---|
| 1570 | |
---|
| 1571 | /* Check with tcp_wrappers if client is allowed to access */ |
---|
| 1572 | if (! gdm_xdmcp_host_allow (address)) { |
---|
| 1573 | char *host2; |
---|
| 1574 | |
---|
| 1575 | host2 = NULL; |
---|
| 1576 | gdm_address_get_numeric_info (address, &host2, NULL); |
---|
| 1577 | |
---|
| 1578 | g_warning ("%s: Got FORWARD_QUERY from banned host %s", |
---|
| 1579 | "gdm_xdmcp_handle_forward query", |
---|
| 1580 | host2); |
---|
| 1581 | g_free (host2); |
---|
| 1582 | return; |
---|
| 1583 | } |
---|
| 1584 | |
---|
| 1585 | /* Read display address */ |
---|
| 1586 | if G_UNLIKELY (! XdmcpReadARRAY8 (&factory->priv->buf, &clnt_addr)) { |
---|
| 1587 | g_warning (_("%s: Could not read display address"), |
---|
| 1588 | "gdm_xdmcp_handle_forward_query"); |
---|
| 1589 | return; |
---|
| 1590 | } |
---|
| 1591 | |
---|
| 1592 | /* Read display port */ |
---|
| 1593 | if G_UNLIKELY (! XdmcpReadARRAY8 (&factory->priv->buf, &clnt_port)) { |
---|
| 1594 | XdmcpDisposeARRAY8 (&clnt_addr); |
---|
| 1595 | g_warning (_("%s: Could not read display port number"), |
---|
| 1596 | "gdm_xdmcp_handle_forward_query"); |
---|
| 1597 | return; |
---|
| 1598 | } |
---|
| 1599 | |
---|
| 1600 | /* Extract array of authentication names from Xdmcp packet */ |
---|
| 1601 | if G_UNLIKELY (! XdmcpReadARRAYofARRAY8 (&factory->priv->buf, &clnt_authlist)) { |
---|
| 1602 | XdmcpDisposeARRAY8 (&clnt_addr); |
---|
| 1603 | XdmcpDisposeARRAY8 (&clnt_port); |
---|
| 1604 | g_warning (_("%s: Could not extract authlist from packet"), |
---|
| 1605 | "gdm_xdmcp_handle_forward_query"); |
---|
| 1606 | return; |
---|
| 1607 | } |
---|
| 1608 | |
---|
| 1609 | /* Crude checksumming */ |
---|
| 1610 | explen = 1; |
---|
| 1611 | explen += 2 + clnt_addr.length; |
---|
| 1612 | explen += 2 + clnt_port.length; |
---|
| 1613 | |
---|
| 1614 | for (i = 0 ; i < clnt_authlist.length ; i++) { |
---|
| 1615 | char *s = g_strndup ((char *) clnt_authlist.data[i].data, |
---|
| 1616 | clnt_authlist.length); |
---|
| 1617 | g_debug ("GdmXdmcpDisplayFactory: authlist: %s", s); |
---|
| 1618 | g_free (s); |
---|
| 1619 | |
---|
| 1620 | explen += 2 + clnt_authlist.data[i].length; |
---|
| 1621 | } |
---|
| 1622 | |
---|
| 1623 | if G_UNLIKELY (len != explen) { |
---|
| 1624 | g_warning (_("%s: Error in checksum"), |
---|
| 1625 | "gdm_xdmcp_handle_forward_query"); |
---|
| 1626 | goto out; |
---|
| 1627 | } |
---|
| 1628 | |
---|
| 1629 | if (! create_address_from_request (&clnt_addr, &clnt_port, gdm_address_get_family_type (address), &disp_address)) { |
---|
| 1630 | g_warning ("Unable to parse address for request"); |
---|
| 1631 | goto out; |
---|
| 1632 | } |
---|
| 1633 | |
---|
| 1634 | gdm_xdmcp_whack_queued_managed_forwards (factory, |
---|
| 1635 | address, |
---|
| 1636 | disp_address); |
---|
| 1637 | |
---|
| 1638 | host = NULL; |
---|
| 1639 | serv = NULL; |
---|
| 1640 | gdm_address_get_numeric_info (disp_address, &host, &serv); |
---|
| 1641 | g_debug ("GdmXdmcpDisplayFactory: Got FORWARD_QUERY for display: %s, port %s", |
---|
| 1642 | host, serv); |
---|
| 1643 | g_free (host); |
---|
| 1644 | g_free (serv); |
---|
| 1645 | |
---|
| 1646 | /* Check with tcp_wrappers if display is allowed to access */ |
---|
| 1647 | if (gdm_xdmcp_host_allow (disp_address)) { |
---|
| 1648 | ForwardQuery *q; |
---|
| 1649 | |
---|
| 1650 | q = forward_query_lookup (factory, disp_address); |
---|
| 1651 | if (q != NULL) { |
---|
| 1652 | forward_query_destroy (factory, q); |
---|
| 1653 | } |
---|
| 1654 | |
---|
| 1655 | forward_query_create (factory, address, disp_address); |
---|
| 1656 | |
---|
| 1657 | gdm_xdmcp_send_willing (factory, disp_address); |
---|
| 1658 | } |
---|
| 1659 | |
---|
| 1660 | out: |
---|
| 1661 | |
---|
| 1662 | gdm_address_free (disp_address); |
---|
| 1663 | |
---|
| 1664 | XdmcpDisposeARRAYofARRAY8 (&clnt_authlist); |
---|
| 1665 | XdmcpDisposeARRAY8 (&clnt_port); |
---|
| 1666 | XdmcpDisposeARRAY8 (&clnt_addr); |
---|
| 1667 | } |
---|
| 1668 | |
---|
| 1669 | static void |
---|
| 1670 | gdm_xdmcp_really_send_managed_forward (GdmXdmcpDisplayFactory *factory, |
---|
| 1671 | GdmAddress *address, |
---|
| 1672 | GdmAddress *origin) |
---|
| 1673 | { |
---|
| 1674 | ARRAY8 addr; |
---|
| 1675 | XdmcpHeader header; |
---|
| 1676 | char *host; |
---|
| 1677 | |
---|
| 1678 | host = NULL; |
---|
| 1679 | gdm_address_get_numeric_info (address, &host, NULL); |
---|
| 1680 | g_debug ("GdmXdmcpDisplayFactory: Sending MANAGED_FORWARD to %s", host); |
---|
| 1681 | g_free (host); |
---|
| 1682 | |
---|
| 1683 | set_address_for_request (origin, &addr); |
---|
| 1684 | |
---|
| 1685 | header.opcode = (CARD16) GDM_XDMCP_MANAGED_FORWARD; |
---|
| 1686 | header.length = 4 + addr.length; |
---|
| 1687 | header.version = GDM_XDMCP_PROTOCOL_VERSION; |
---|
| 1688 | XdmcpWriteHeader (&factory->priv->buf, &header); |
---|
| 1689 | |
---|
| 1690 | XdmcpWriteARRAY8 (&factory->priv->buf, &addr); |
---|
| 1691 | XdmcpFlush (factory->priv->socket_fd, |
---|
| 1692 | &factory->priv->buf, |
---|
| 1693 | (XdmcpNetaddr)gdm_address_peek_sockaddr_storage (address), |
---|
| 1694 | (int)sizeof (struct sockaddr_storage)); |
---|
| 1695 | |
---|
| 1696 | g_free (addr.data); |
---|
| 1697 | } |
---|
| 1698 | |
---|
| 1699 | static gboolean |
---|
| 1700 | managed_forward_handler (ManagedForward *mf) |
---|
| 1701 | { |
---|
| 1702 | if (mf->xdmcp_display_factory->priv->socket_fd > 0) { |
---|
| 1703 | gdm_xdmcp_really_send_managed_forward (mf->xdmcp_display_factory, |
---|
| 1704 | mf->manager, |
---|
| 1705 | mf->origin); |
---|
| 1706 | } |
---|
| 1707 | |
---|
| 1708 | mf->times++; |
---|
| 1709 | if (mf->xdmcp_display_factory->priv->socket_fd <= 0 || mf->times >= 2) { |
---|
| 1710 | mf->xdmcp_display_factory->priv->managed_forwards = g_slist_remove (mf->xdmcp_display_factory->priv->managed_forwards, mf); |
---|
| 1711 | mf->handler = 0; |
---|
| 1712 | /* mf freed by glib */ |
---|
| 1713 | return FALSE; |
---|
| 1714 | } |
---|
| 1715 | return TRUE; |
---|
| 1716 | } |
---|
| 1717 | |
---|
| 1718 | static void |
---|
| 1719 | managed_forward_free (ManagedForward *mf) |
---|
| 1720 | { |
---|
| 1721 | gdm_address_free (mf->origin); |
---|
| 1722 | gdm_address_free (mf->manager); |
---|
| 1723 | g_free (mf); |
---|
| 1724 | } |
---|
| 1725 | |
---|
| 1726 | static void |
---|
| 1727 | gdm_xdmcp_send_managed_forward (GdmXdmcpDisplayFactory *factory, |
---|
| 1728 | GdmAddress *address, |
---|
| 1729 | GdmAddress *origin) |
---|
| 1730 | { |
---|
| 1731 | ManagedForward *mf; |
---|
| 1732 | |
---|
| 1733 | gdm_xdmcp_really_send_managed_forward (factory, address, origin); |
---|
| 1734 | |
---|
| 1735 | mf = g_new0 (ManagedForward, 1); |
---|
| 1736 | mf->times = 0; |
---|
| 1737 | mf->xdmcp_display_factory = factory; |
---|
| 1738 | |
---|
| 1739 | mf->manager = gdm_address_copy (address); |
---|
| 1740 | mf->origin = gdm_address_copy (origin); |
---|
| 1741 | |
---|
| 1742 | mf->handler = g_timeout_add_full (G_PRIORITY_DEFAULT, |
---|
| 1743 | MANAGED_FORWARD_INTERVAL, |
---|
| 1744 | (GSourceFunc)managed_forward_handler, |
---|
| 1745 | mf, |
---|
| 1746 | (GDestroyNotify)managed_forward_free); |
---|
| 1747 | factory->priv->managed_forwards = g_slist_prepend (factory->priv->managed_forwards, mf); |
---|
| 1748 | } |
---|
| 1749 | |
---|
| 1750 | static void |
---|
| 1751 | gdm_xdmcp_send_got_managed_forward (GdmXdmcpDisplayFactory *factory, |
---|
| 1752 | GdmAddress *address, |
---|
| 1753 | GdmAddress *origin) |
---|
| 1754 | { |
---|
| 1755 | ARRAY8 addr; |
---|
| 1756 | XdmcpHeader header; |
---|
| 1757 | char *host; |
---|
| 1758 | |
---|
| 1759 | host = NULL; |
---|
| 1760 | gdm_address_get_numeric_info (address, &host, NULL); |
---|
| 1761 | g_debug ("GdmXdmcpDisplayFactory: Sending GOT_MANAGED_FORWARD to %s", host); |
---|
| 1762 | g_free (host); |
---|
| 1763 | |
---|
| 1764 | set_address_for_request (origin, &addr); |
---|
| 1765 | |
---|
| 1766 | header.opcode = (CARD16) GDM_XDMCP_GOT_MANAGED_FORWARD; |
---|
| 1767 | header.length = 4 + addr.length; |
---|
| 1768 | header.version = GDM_XDMCP_PROTOCOL_VERSION; |
---|
| 1769 | XdmcpWriteHeader (&factory->priv->buf, &header); |
---|
| 1770 | |
---|
| 1771 | XdmcpWriteARRAY8 (&factory->priv->buf, &addr); |
---|
| 1772 | XdmcpFlush (factory->priv->socket_fd, |
---|
| 1773 | &factory->priv->buf, |
---|
| 1774 | (XdmcpNetaddr)gdm_address_peek_sockaddr_storage (address), |
---|
| 1775 | (int)sizeof (struct sockaddr_storage)); |
---|
| 1776 | } |
---|
| 1777 | |
---|
| 1778 | static gboolean |
---|
| 1779 | count_sessions (const char *id, |
---|
| 1780 | GdmDisplay *display, |
---|
| 1781 | GdmXdmcpDisplayFactory *factory) |
---|
| 1782 | { |
---|
| 1783 | if (GDM_IS_XDMCP_DISPLAY (display)) { |
---|
| 1784 | int status; |
---|
| 1785 | |
---|
| 1786 | status = gdm_display_get_status (display); |
---|
| 1787 | |
---|
| 1788 | if (status == GDM_DISPLAY_MANAGED) { |
---|
| 1789 | factory->priv->num_sessions++; |
---|
| 1790 | } else if (status == GDM_DISPLAY_UNMANAGED) { |
---|
| 1791 | factory->priv->num_pending_sessions++; |
---|
| 1792 | } |
---|
| 1793 | } |
---|
| 1794 | |
---|
| 1795 | return TRUE; |
---|
| 1796 | } |
---|
| 1797 | |
---|
| 1798 | static void |
---|
| 1799 | gdm_xdmcp_recount_sessions (GdmXdmcpDisplayFactory *factory) |
---|
| 1800 | { |
---|
| 1801 | GdmDisplayStore *store; |
---|
| 1802 | |
---|
| 1803 | factory->priv->num_sessions = 0; |
---|
| 1804 | factory->priv->num_pending_sessions = 0; |
---|
| 1805 | |
---|
| 1806 | store = gdm_display_factory_get_display_store (GDM_DISPLAY_FACTORY (factory)); |
---|
| 1807 | gdm_display_store_foreach (store, |
---|
| 1808 | (GdmDisplayStoreFunc)count_sessions, |
---|
| 1809 | factory); |
---|
| 1810 | } |
---|
| 1811 | |
---|
| 1812 | static gboolean |
---|
| 1813 | purge_displays (const char *id, |
---|
| 1814 | GdmDisplay *display, |
---|
| 1815 | GdmXdmcpDisplayFactory *factory) |
---|
| 1816 | { |
---|
| 1817 | if (GDM_IS_XDMCP_DISPLAY (display)) { |
---|
| 1818 | int status; |
---|
| 1819 | time_t currtime; |
---|
| 1820 | time_t acctime; |
---|
| 1821 | |
---|
| 1822 | currtime = time (NULL); |
---|
| 1823 | status = gdm_display_get_status (display); |
---|
| 1824 | acctime = gdm_display_get_creation_time (display); |
---|
| 1825 | |
---|
| 1826 | if (status == GDM_DISPLAY_UNMANAGED && |
---|
| 1827 | currtime > acctime + factory->priv->max_wait) { |
---|
| 1828 | /* return TRUE to remove display */ |
---|
| 1829 | return TRUE; |
---|
| 1830 | } |
---|
| 1831 | } |
---|
| 1832 | |
---|
| 1833 | return FALSE; |
---|
| 1834 | } |
---|
| 1835 | |
---|
| 1836 | static void |
---|
| 1837 | gdm_xdmcp_displays_purge (GdmXdmcpDisplayFactory *factory) |
---|
| 1838 | { |
---|
| 1839 | GdmDisplayStore *store; |
---|
| 1840 | |
---|
| 1841 | store = gdm_display_factory_get_display_store (GDM_DISPLAY_FACTORY (factory)); |
---|
| 1842 | |
---|
| 1843 | gdm_display_store_foreach_remove (store, |
---|
| 1844 | (GdmDisplayStoreFunc)purge_displays, |
---|
| 1845 | factory); |
---|
| 1846 | |
---|
| 1847 | gdm_xdmcp_recount_sessions (factory); |
---|
| 1848 | } |
---|
| 1849 | |
---|
| 1850 | typedef struct { |
---|
| 1851 | const char *hostname; |
---|
| 1852 | int display_num; |
---|
| 1853 | } RemoveHostData; |
---|
| 1854 | |
---|
| 1855 | static gboolean |
---|
| 1856 | remove_host (const char *id, |
---|
| 1857 | GdmDisplay *display, |
---|
| 1858 | RemoveHostData *data) |
---|
| 1859 | { |
---|
| 1860 | char *hostname; |
---|
| 1861 | int disp_num; |
---|
| 1862 | |
---|
| 1863 | if (! GDM_IS_XDMCP_DISPLAY (display)) { |
---|
| 1864 | return FALSE; |
---|
| 1865 | } |
---|
| 1866 | |
---|
| 1867 | gdm_display_get_remote_hostname (display, &hostname, NULL); |
---|
| 1868 | gdm_display_get_x11_display_number (display, &disp_num, NULL); |
---|
| 1869 | |
---|
| 1870 | if (disp_num == data->display_num && |
---|
| 1871 | hostname != NULL && |
---|
| 1872 | data->hostname != NULL && |
---|
| 1873 | strcmp (hostname, data->hostname) == 0) { |
---|
| 1874 | /* return TRUE to remove */ |
---|
| 1875 | return TRUE; |
---|
| 1876 | } |
---|
| 1877 | |
---|
| 1878 | return FALSE; |
---|
| 1879 | } |
---|
| 1880 | |
---|
| 1881 | static void |
---|
| 1882 | display_dispose_check (GdmXdmcpDisplayFactory *factory, |
---|
| 1883 | const char *hostname, |
---|
| 1884 | int display_num) |
---|
| 1885 | { |
---|
| 1886 | RemoveHostData *data; |
---|
| 1887 | GdmDisplayStore *store; |
---|
| 1888 | |
---|
| 1889 | if (hostname == NULL) { |
---|
| 1890 | return; |
---|
| 1891 | } |
---|
| 1892 | |
---|
| 1893 | store = gdm_display_factory_get_display_store (GDM_DISPLAY_FACTORY (factory)); |
---|
| 1894 | |
---|
| 1895 | g_debug ("GdmXdmcpDisplayFactory: display_dispose_check (%s:%d)", hostname, display_num); |
---|
| 1896 | |
---|
| 1897 | data = g_new0 (RemoveHostData, 1); |
---|
| 1898 | data->hostname = hostname; |
---|
| 1899 | data->display_num = display_num; |
---|
| 1900 | gdm_display_store_foreach_remove (store, |
---|
| 1901 | (GdmDisplayStoreFunc)remove_host, |
---|
| 1902 | data); |
---|
| 1903 | g_free (data); |
---|
| 1904 | |
---|
| 1905 | gdm_xdmcp_recount_sessions (factory); |
---|
| 1906 | } |
---|
| 1907 | |
---|
| 1908 | static void |
---|
| 1909 | gdm_xdmcp_send_decline (GdmXdmcpDisplayFactory *factory, |
---|
| 1910 | GdmAddress *address, |
---|
| 1911 | const char *reason) |
---|
| 1912 | { |
---|
| 1913 | XdmcpHeader header; |
---|
| 1914 | ARRAY8 authentype; |
---|
| 1915 | ARRAY8 authendata; |
---|
| 1916 | ARRAY8 status; |
---|
| 1917 | ForwardQuery *fq; |
---|
| 1918 | char *host; |
---|
| 1919 | |
---|
| 1920 | host = NULL; |
---|
| 1921 | gdm_address_get_numeric_info (address, &host, NULL); |
---|
| 1922 | g_debug ("GdmXdmcpDisplayFactory: Sending DECLINE to %s", host); |
---|
| 1923 | g_free (host); |
---|
| 1924 | |
---|
| 1925 | authentype.data = (CARD8 *) 0; |
---|
| 1926 | authentype.length = (CARD16) 0; |
---|
| 1927 | |
---|
| 1928 | authendata.data = (CARD8 *) 0; |
---|
| 1929 | authendata.length = (CARD16) 0; |
---|
| 1930 | |
---|
| 1931 | status.data = (CARD8 *) reason; |
---|
| 1932 | status.length = strlen ((char *) status.data); |
---|
| 1933 | |
---|
| 1934 | header.version = XDM_PROTOCOL_VERSION; |
---|
| 1935 | header.opcode = (CARD16) DECLINE; |
---|
| 1936 | header.length = 2 + status.length; |
---|
| 1937 | header.length += 2 + authentype.length; |
---|
| 1938 | header.length += 2 + authendata.length; |
---|
| 1939 | |
---|
| 1940 | XdmcpWriteHeader (&factory->priv->buf, &header); |
---|
| 1941 | XdmcpWriteARRAY8 (&factory->priv->buf, &status); |
---|
| 1942 | XdmcpWriteARRAY8 (&factory->priv->buf, &authentype); |
---|
| 1943 | XdmcpWriteARRAY8 (&factory->priv->buf, &authendata); |
---|
| 1944 | |
---|
| 1945 | XdmcpFlush (factory->priv->socket_fd, |
---|
| 1946 | &factory->priv->buf, |
---|
| 1947 | (XdmcpNetaddr)gdm_address_peek_sockaddr_storage (address), |
---|
| 1948 | (int)sizeof (struct sockaddr_storage)); |
---|
| 1949 | |
---|
| 1950 | /* Send MANAGED_FORWARD to indicate that the connection |
---|
| 1951 | * reached some sort of resolution */ |
---|
| 1952 | fq = forward_query_lookup (factory, address); |
---|
| 1953 | if (fq != NULL) { |
---|
| 1954 | gdm_xdmcp_send_managed_forward (factory, fq->from_address, address); |
---|
| 1955 | forward_query_destroy (factory, fq); |
---|
| 1956 | } |
---|
| 1957 | } |
---|
| 1958 | |
---|
| 1959 | static void |
---|
| 1960 | on_hostname_selected (GdmXdmcpChooserDisplay *display, |
---|
| 1961 | const char *hostname, |
---|
| 1962 | GdmXdmcpDisplayFactory *factory) |
---|
| 1963 | { |
---|
| 1964 | struct addrinfo hints; |
---|
| 1965 | struct addrinfo *ai_list; |
---|
| 1966 | struct addrinfo *ai; |
---|
| 1967 | int gaierr; |
---|
| 1968 | GdmAddress *address; |
---|
| 1969 | IndirectClient *ic; |
---|
| 1970 | |
---|
| 1971 | g_debug ("GdmXdmcpDisplayFactory: hostname selected: %s", hostname); |
---|
| 1972 | |
---|
| 1973 | address = gdm_xdmcp_display_get_remote_address (GDM_XDMCP_DISPLAY (display)); |
---|
| 1974 | |
---|
| 1975 | g_assert (address != NULL); |
---|
| 1976 | |
---|
| 1977 | ic = indirect_client_lookup (factory, address); |
---|
| 1978 | |
---|
| 1979 | if (ic->chosen_address != NULL) { |
---|
| 1980 | gdm_address_free (ic->chosen_address); |
---|
| 1981 | ic->chosen_address = NULL; |
---|
| 1982 | } |
---|
| 1983 | |
---|
| 1984 | memset (&hints, 0, sizeof (hints)); |
---|
| 1985 | hints.ai_family = gdm_address_get_family_type (address); |
---|
| 1986 | hints.ai_flags = AI_V4MAPPED; /* this should convert IPv4 address to IPv6 if needed */ |
---|
| 1987 | if ((gaierr = getaddrinfo (hostname, NULL, &hints, &ai_list)) != 0) { |
---|
| 1988 | g_warning ("Unable get address: %s", gai_strerror (gaierr)); |
---|
| 1989 | return; |
---|
| 1990 | } |
---|
| 1991 | |
---|
| 1992 | /* just take the first one */ |
---|
| 1993 | ai = ai_list; |
---|
| 1994 | |
---|
| 1995 | if (ai != NULL) { |
---|
| 1996 | char *ip; |
---|
| 1997 | ic->chosen_address = gdm_address_new_from_sockaddr (ai->ai_addr, ai->ai_addrlen); |
---|
| 1998 | |
---|
| 1999 | ip = NULL; |
---|
| 2000 | gdm_address_get_numeric_info (ic->chosen_address, &ip, NULL); |
---|
| 2001 | g_debug ("GdmXdmcpDisplayFactory: hostname resolves to %s", ip); |
---|
| 2002 | g_free (ip); |
---|
| 2003 | } |
---|
| 2004 | |
---|
| 2005 | freeaddrinfo (ai_list); |
---|
| 2006 | } |
---|
| 2007 | |
---|
| 2008 | static GdmDisplay * |
---|
| 2009 | gdm_xdmcp_display_create (GdmXdmcpDisplayFactory *factory, |
---|
| 2010 | const char *hostname, |
---|
| 2011 | GdmAddress *address, |
---|
| 2012 | int displaynum) |
---|
| 2013 | { |
---|
| 2014 | GdmDisplay *display; |
---|
| 2015 | GdmDisplayStore *store; |
---|
| 2016 | gboolean use_chooser; |
---|
| 2017 | |
---|
| 2018 | g_debug ("GdmXdmcpDisplayFactory: Creating xdmcp display for %s:%d", hostname, displaynum); |
---|
| 2019 | |
---|
| 2020 | use_chooser = FALSE; |
---|
| 2021 | if (factory->priv->honor_indirect) { |
---|
| 2022 | IndirectClient *ic; |
---|
| 2023 | |
---|
| 2024 | ic = indirect_client_lookup (factory, address); |
---|
| 2025 | |
---|
| 2026 | /* This was an indirect thingie and nothing was yet chosen, |
---|
| 2027 | * use a chooser */ |
---|
| 2028 | if (ic != NULL && ic->chosen_address == NULL) { |
---|
| 2029 | use_chooser = TRUE; |
---|
| 2030 | } |
---|
| 2031 | } |
---|
| 2032 | |
---|
| 2033 | if (use_chooser) { |
---|
| 2034 | display = gdm_xdmcp_chooser_display_new (hostname, |
---|
| 2035 | displaynum, |
---|
| 2036 | address, |
---|
| 2037 | get_next_session_serial (factory)); |
---|
| 2038 | g_signal_connect (display, "hostname-selected", G_CALLBACK (on_hostname_selected), factory); |
---|
| 2039 | } else { |
---|
| 2040 | display = gdm_xdmcp_greeter_display_new (hostname, |
---|
| 2041 | displaynum, |
---|
| 2042 | address, |
---|
| 2043 | get_next_session_serial (factory)); |
---|
| 2044 | } |
---|
| 2045 | |
---|
| 2046 | if (display == NULL) { |
---|
| 2047 | goto out; |
---|
| 2048 | } |
---|
| 2049 | |
---|
| 2050 | if (! gdm_display_prepare (display)) { |
---|
| 2051 | gdm_display_unmanage (display); |
---|
| 2052 | g_object_unref (display); |
---|
| 2053 | display = NULL; |
---|
| 2054 | goto out; |
---|
| 2055 | } |
---|
| 2056 | |
---|
| 2057 | store = gdm_display_factory_get_display_store (GDM_DISPLAY_FACTORY (factory)); |
---|
| 2058 | gdm_display_store_add (store, display); |
---|
| 2059 | |
---|
| 2060 | factory->priv->num_pending_sessions++; |
---|
| 2061 | out: |
---|
| 2062 | |
---|
| 2063 | return display; |
---|
| 2064 | } |
---|
| 2065 | |
---|
| 2066 | static void |
---|
| 2067 | gdm_xdmcp_send_accept (GdmXdmcpDisplayFactory *factory, |
---|
| 2068 | GdmAddress *address, |
---|
| 2069 | CARD32 session_id, |
---|
| 2070 | ARRAY8Ptr authentication_name, |
---|
| 2071 | ARRAY8Ptr authentication_data, |
---|
| 2072 | ARRAY8Ptr authorization_name, |
---|
| 2073 | ARRAY8Ptr authorization_data) |
---|
| 2074 | { |
---|
| 2075 | XdmcpHeader header; |
---|
| 2076 | char *host; |
---|
| 2077 | |
---|
| 2078 | header.version = XDM_PROTOCOL_VERSION; |
---|
| 2079 | header.opcode = (CARD16) ACCEPT; |
---|
| 2080 | header.length = 4; |
---|
| 2081 | header.length += 2 + authentication_name->length; |
---|
| 2082 | header.length += 2 + authentication_data->length; |
---|
| 2083 | header.length += 2 + authorization_name->length; |
---|
| 2084 | header.length += 2 + authorization_data->length; |
---|
| 2085 | |
---|
| 2086 | XdmcpWriteHeader (&factory->priv->buf, &header); |
---|
| 2087 | XdmcpWriteCARD32 (&factory->priv->buf, session_id); |
---|
| 2088 | XdmcpWriteARRAY8 (&factory->priv->buf, authentication_name); |
---|
| 2089 | XdmcpWriteARRAY8 (&factory->priv->buf, authentication_data); |
---|
| 2090 | XdmcpWriteARRAY8 (&factory->priv->buf, authorization_name); |
---|
| 2091 | XdmcpWriteARRAY8 (&factory->priv->buf, authorization_data); |
---|
| 2092 | |
---|
| 2093 | XdmcpFlush (factory->priv->socket_fd, |
---|
| 2094 | &factory->priv->buf, |
---|
| 2095 | (XdmcpNetaddr)gdm_address_peek_sockaddr_storage (address), |
---|
| 2096 | (int)sizeof (struct sockaddr_storage)); |
---|
| 2097 | |
---|
| 2098 | host = NULL; |
---|
| 2099 | gdm_address_get_numeric_info (address, &host, NULL); |
---|
| 2100 | g_debug ("GdmXdmcpDisplayFactory: Sending ACCEPT to %s with SessionID=%ld", |
---|
| 2101 | host, |
---|
| 2102 | (long)session_id); |
---|
| 2103 | g_free (host); |
---|
| 2104 | } |
---|
| 2105 | |
---|
| 2106 | static void |
---|
| 2107 | gdm_xdmcp_handle_request (GdmXdmcpDisplayFactory *factory, |
---|
| 2108 | GdmAddress *address, |
---|
| 2109 | int len) |
---|
| 2110 | { |
---|
| 2111 | CARD16 clnt_dspnum; |
---|
| 2112 | ARRAY16 clnt_conntyp; |
---|
| 2113 | ARRAYofARRAY8 clnt_addr; |
---|
| 2114 | ARRAY8 clnt_authname; |
---|
| 2115 | ARRAY8 clnt_authdata; |
---|
| 2116 | ARRAYofARRAY8 clnt_authorization_names; |
---|
| 2117 | ARRAY8 clnt_manufacturer; |
---|
| 2118 | int explen; |
---|
| 2119 | int i; |
---|
| 2120 | gboolean mitauth; |
---|
| 2121 | gboolean entered; |
---|
| 2122 | char *hostname; |
---|
| 2123 | |
---|
| 2124 | mitauth = FALSE; |
---|
| 2125 | entered = FALSE; |
---|
| 2126 | |
---|
| 2127 | hostname = NULL; |
---|
| 2128 | gdm_address_get_numeric_info (address, &hostname, NULL); |
---|
| 2129 | g_debug ("GdmXdmcpDisplayFactory: Got REQUEST from %s", hostname); |
---|
| 2130 | |
---|
| 2131 | /* Check with tcp_wrappers if client is allowed to access */ |
---|
| 2132 | if (! gdm_xdmcp_host_allow (address)) { |
---|
| 2133 | g_warning (_("%s: Got REQUEST from banned host %s"), |
---|
| 2134 | "gdm_xdmcp_handle_request", |
---|
| 2135 | hostname); |
---|
| 2136 | goto out; |
---|
| 2137 | } |
---|
| 2138 | |
---|
| 2139 | gdm_xdmcp_displays_purge (factory); /* Purge pending displays */ |
---|
| 2140 | |
---|
| 2141 | /* Remote display number */ |
---|
| 2142 | if G_UNLIKELY (! XdmcpReadCARD16 (&factory->priv->buf, &clnt_dspnum)) { |
---|
| 2143 | g_warning (_("%s: Could not read Display Number"), |
---|
| 2144 | "gdm_xdmcp_handle_request"); |
---|
| 2145 | goto out; |
---|
| 2146 | } |
---|
| 2147 | |
---|
| 2148 | /* We don't care about connection type. Address says it all */ |
---|
| 2149 | if G_UNLIKELY (! XdmcpReadARRAY16 (&factory->priv->buf, &clnt_conntyp)) { |
---|
| 2150 | g_warning (_("%s: Could not read Connection Type"), |
---|
| 2151 | "gdm_xdmcp_handle_request"); |
---|
| 2152 | goto out; |
---|
| 2153 | } |
---|
| 2154 | |
---|
| 2155 | /* This is TCP/IP - we don't care */ |
---|
| 2156 | if G_UNLIKELY (! XdmcpReadARRAYofARRAY8 (&factory->priv->buf, &clnt_addr)) { |
---|
| 2157 | g_warning (_("%s: Could not read Client Address"), |
---|
| 2158 | "gdm_xdmcp_handle_request"); |
---|
| 2159 | XdmcpDisposeARRAY16 (&clnt_conntyp); |
---|
| 2160 | goto out; |
---|
| 2161 | } |
---|
| 2162 | |
---|
| 2163 | /* Read authentication type */ |
---|
| 2164 | if G_UNLIKELY (! XdmcpReadARRAY8 (&factory->priv->buf, &clnt_authname)) { |
---|
| 2165 | g_warning (_("%s: Could not read Authentication Names"), |
---|
| 2166 | "gdm_xdmcp_handle_request"); |
---|
| 2167 | XdmcpDisposeARRAYofARRAY8 (&clnt_addr); |
---|
| 2168 | XdmcpDisposeARRAY16 (&clnt_conntyp); |
---|
| 2169 | goto out; |
---|
| 2170 | } |
---|
| 2171 | |
---|
| 2172 | /* Read authentication data */ |
---|
| 2173 | if G_UNLIKELY (! XdmcpReadARRAY8 (&factory->priv->buf, &clnt_authdata)) { |
---|
| 2174 | g_warning (_("%s: Could not read Authentication Data"), |
---|
| 2175 | "gdm_xdmcp_handle_request"); |
---|
| 2176 | XdmcpDisposeARRAYofARRAY8 (&clnt_addr); |
---|
| 2177 | XdmcpDisposeARRAY16 (&clnt_conntyp); |
---|
| 2178 | XdmcpDisposeARRAY8 (&clnt_authname); |
---|
| 2179 | goto out; |
---|
| 2180 | } |
---|
| 2181 | |
---|
| 2182 | /* Read and select from supported authorization list */ |
---|
| 2183 | if G_UNLIKELY (! XdmcpReadARRAYofARRAY8 (&factory->priv->buf, &clnt_authorization_names)) { |
---|
| 2184 | g_warning (_("%s: Could not read Authorization List"), |
---|
| 2185 | "gdm_xdmcp_handle_request"); |
---|
| 2186 | XdmcpDisposeARRAY8 (&clnt_authdata); |
---|
| 2187 | XdmcpDisposeARRAYofARRAY8 (&clnt_addr); |
---|
| 2188 | XdmcpDisposeARRAY16 (&clnt_conntyp); |
---|
| 2189 | XdmcpDisposeARRAY8 (&clnt_authname); |
---|
| 2190 | goto out; |
---|
| 2191 | } |
---|
| 2192 | |
---|
| 2193 | /* libXdmcp doesn't terminate strings properly so we cheat and use strncmp () */ |
---|
| 2194 | for (i = 0 ; i < clnt_authorization_names.length ; i++) { |
---|
| 2195 | if (clnt_authorization_names.data[i].length == 18 && |
---|
| 2196 | strncmp ((char *) clnt_authorization_names.data[i].data, "MIT-MAGIC-COOKIE-1", 18) == 0) { |
---|
| 2197 | mitauth = TRUE; |
---|
| 2198 | } |
---|
| 2199 | } |
---|
| 2200 | |
---|
| 2201 | /* Manufacturer ID */ |
---|
| 2202 | if G_UNLIKELY (! XdmcpReadARRAY8 (&factory->priv->buf, &clnt_manufacturer)) { |
---|
| 2203 | g_warning (_("%s: Could not read Manufacturer ID"), |
---|
| 2204 | "gdm_xdmcp_handle_request"); |
---|
| 2205 | XdmcpDisposeARRAY8 (&clnt_authname); |
---|
| 2206 | XdmcpDisposeARRAY8 (&clnt_authdata); |
---|
| 2207 | XdmcpDisposeARRAYofARRAY8 (&clnt_addr); |
---|
| 2208 | XdmcpDisposeARRAYofARRAY8 (&clnt_authorization_names); |
---|
| 2209 | XdmcpDisposeARRAY16 (&clnt_conntyp); |
---|
| 2210 | goto out; |
---|
| 2211 | } |
---|
| 2212 | |
---|
| 2213 | /* Crude checksumming */ |
---|
| 2214 | explen = 2; /* Display Number */ |
---|
| 2215 | explen += 1 + 2 * clnt_conntyp.length; /* Connection Type */ |
---|
| 2216 | explen += 1; /* Connection Address */ |
---|
| 2217 | for (i = 0 ; i < clnt_addr.length ; i++) { |
---|
| 2218 | explen += 2 + clnt_addr.data[i].length; |
---|
| 2219 | } |
---|
| 2220 | explen += 2 + clnt_authname.length; /* Authentication Name */ |
---|
| 2221 | explen += 2 + clnt_authdata.length; /* Authentication Data */ |
---|
| 2222 | explen += 1; /* Authorization Names */ |
---|
| 2223 | for (i = 0 ; i < clnt_authorization_names.length ; i++) { |
---|
| 2224 | explen += 2 + clnt_authorization_names.data[i].length; |
---|
| 2225 | } |
---|
| 2226 | |
---|
| 2227 | explen += 2 + clnt_manufacturer.length; |
---|
| 2228 | |
---|
| 2229 | if G_UNLIKELY (explen != len) { |
---|
| 2230 | g_warning (_("%s: Failed checksum from %s"), |
---|
| 2231 | "gdm_xdmcp_handle_request", |
---|
| 2232 | hostname); |
---|
| 2233 | |
---|
| 2234 | XdmcpDisposeARRAY8 (&clnt_authname); |
---|
| 2235 | XdmcpDisposeARRAY8 (&clnt_authdata); |
---|
| 2236 | XdmcpDisposeARRAY8 (&clnt_manufacturer); |
---|
| 2237 | XdmcpDisposeARRAYofARRAY8 (&clnt_addr); |
---|
| 2238 | XdmcpDisposeARRAYofARRAY8 (&clnt_authorization_names); |
---|
| 2239 | XdmcpDisposeARRAY16 (&clnt_conntyp); |
---|
| 2240 | goto out; |
---|
| 2241 | } |
---|
| 2242 | |
---|
| 2243 | { |
---|
| 2244 | char *s = g_strndup ((char *) clnt_manufacturer.data, clnt_manufacturer.length); |
---|
| 2245 | g_debug ("GdmXdmcpDisplayFactory: xdmcp_pending=%d, MaxPending=%d, xdmcp_sessions=%d, MaxSessions=%d, ManufacturerID=%s", |
---|
| 2246 | factory->priv->num_pending_sessions, |
---|
| 2247 | factory->priv->max_pending_displays, |
---|
| 2248 | factory->priv->num_sessions, |
---|
| 2249 | factory->priv->max_displays, |
---|
| 2250 | s != NULL ? s : ""); |
---|
| 2251 | g_free (s); |
---|
| 2252 | } |
---|
| 2253 | |
---|
| 2254 | /* Check if ok to manage display */ |
---|
| 2255 | if (mitauth && |
---|
| 2256 | factory->priv->num_sessions < factory->priv->max_displays && |
---|
| 2257 | (gdm_address_is_local (address) || |
---|
| 2258 | gdm_xdmcp_num_displays_from_host (factory, address) < factory->priv->max_displays_per_host)) { |
---|
| 2259 | entered = TRUE; |
---|
| 2260 | } |
---|
| 2261 | |
---|
| 2262 | if (entered) { |
---|
| 2263 | |
---|
| 2264 | /* Check if we are already talking to this host */ |
---|
| 2265 | display_dispose_check (factory, hostname, clnt_dspnum); |
---|
| 2266 | |
---|
| 2267 | if (factory->priv->num_pending_sessions >= factory->priv->max_pending_displays) { |
---|
| 2268 | g_debug ("GdmXdmcpDisplayFactory: maximum pending"); |
---|
| 2269 | /* Don't translate, this goes over the wire to servers where we |
---|
| 2270 | * don't know the charset or language, so it must be ascii */ |
---|
| 2271 | gdm_xdmcp_send_decline (factory, address, "Maximum pending servers"); |
---|
| 2272 | } else { |
---|
| 2273 | GdmDisplay *display; |
---|
| 2274 | |
---|
| 2275 | display = gdm_xdmcp_display_create (factory, |
---|
| 2276 | hostname, |
---|
| 2277 | address, |
---|
| 2278 | clnt_dspnum); |
---|
| 2279 | |
---|
| 2280 | if (display != NULL) { |
---|
| 2281 | ARRAY8 authentication_name; |
---|
| 2282 | ARRAY8 authentication_data; |
---|
| 2283 | ARRAY8 authorization_name; |
---|
| 2284 | ARRAY8 authorization_data; |
---|
| 2285 | gint32 session_number; |
---|
| 2286 | GArray *cookie; |
---|
| 2287 | char *name; |
---|
| 2288 | |
---|
| 2289 | gdm_display_get_x11_cookie (display, &cookie, NULL); |
---|
| 2290 | |
---|
| 2291 | gdm_display_get_x11_display_name (display, &name, NULL); |
---|
| 2292 | |
---|
| 2293 | g_debug ("GdmXdmcpDisplayFactory: Sending authorization key for display %s", name); |
---|
| 2294 | g_free (name); |
---|
| 2295 | |
---|
| 2296 | g_debug ("GdmXdmcpDisplayFactory: cookie len %d", (int) cookie->len); |
---|
| 2297 | |
---|
| 2298 | session_number = gdm_xdmcp_display_get_session_number (GDM_XDMCP_DISPLAY (display)); |
---|
| 2299 | |
---|
| 2300 | /* the send accept will fail if cookie is null */ |
---|
| 2301 | g_assert (cookie != NULL); |
---|
| 2302 | |
---|
| 2303 | authentication_name.data = NULL; |
---|
| 2304 | authentication_name.length = 0; |
---|
| 2305 | authentication_data.data = NULL; |
---|
| 2306 | authentication_data.length = 0; |
---|
| 2307 | |
---|
| 2308 | authorization_name.data = (CARD8 *) "MIT-MAGIC-COOKIE-1"; |
---|
| 2309 | authorization_name.length = strlen ((char *) authorization_name.data); |
---|
| 2310 | |
---|
| 2311 | authorization_data.data = (CARD8 *) cookie->data; |
---|
| 2312 | authorization_data.length = cookie->len; |
---|
| 2313 | |
---|
| 2314 | /* the addrs are NOT copied */ |
---|
| 2315 | gdm_xdmcp_send_accept (factory, |
---|
| 2316 | address, |
---|
| 2317 | session_number, |
---|
| 2318 | &authentication_name, |
---|
| 2319 | &authentication_data, |
---|
| 2320 | &authorization_name, |
---|
| 2321 | &authorization_data); |
---|
| 2322 | |
---|
| 2323 | g_array_free (cookie, TRUE); |
---|
| 2324 | } |
---|
| 2325 | } |
---|
| 2326 | } else { |
---|
| 2327 | /* Don't translate, this goes over the wire to servers where we |
---|
| 2328 | * don't know the charset or language, so it must be ascii */ |
---|
| 2329 | if ( ! mitauth) { |
---|
| 2330 | gdm_xdmcp_send_decline (factory, |
---|
| 2331 | address, |
---|
| 2332 | "Only MIT-MAGIC-COOKIE-1 supported"); |
---|
| 2333 | } else if (factory->priv->num_sessions >= factory->priv->max_displays) { |
---|
| 2334 | g_warning ("Maximum number of open XDMCP sessions reached"); |
---|
| 2335 | gdm_xdmcp_send_decline (factory, |
---|
| 2336 | address, |
---|
| 2337 | "Maximum number of open sessions reached"); |
---|
| 2338 | } else { |
---|
| 2339 | g_debug ("GdmXdmcpDisplayFactory: Maximum number of open XDMCP sessions from host %s reached", |
---|
| 2340 | hostname); |
---|
| 2341 | gdm_xdmcp_send_decline (factory, |
---|
| 2342 | address, |
---|
| 2343 | "Maximum number of open sessions from your host reached"); |
---|
| 2344 | } |
---|
| 2345 | } |
---|
| 2346 | |
---|
| 2347 | XdmcpDisposeARRAY8 (&clnt_authname); |
---|
| 2348 | XdmcpDisposeARRAY8 (&clnt_authdata); |
---|
| 2349 | XdmcpDisposeARRAY8 (&clnt_manufacturer); |
---|
| 2350 | XdmcpDisposeARRAYofARRAY8 (&clnt_addr); |
---|
| 2351 | XdmcpDisposeARRAYofARRAY8 (&clnt_authorization_names); |
---|
| 2352 | XdmcpDisposeARRAY16 (&clnt_conntyp); |
---|
| 2353 | out: |
---|
| 2354 | g_free (hostname); |
---|
| 2355 | } |
---|
| 2356 | |
---|
| 2357 | static gboolean |
---|
| 2358 | lookup_by_session_id (const char *id, |
---|
| 2359 | GdmDisplay *display, |
---|
| 2360 | gpointer data) |
---|
| 2361 | { |
---|
| 2362 | CARD32 sessid; |
---|
| 2363 | CARD32 session_id; |
---|
| 2364 | |
---|
| 2365 | sessid = GPOINTER_TO_INT (data); |
---|
| 2366 | |
---|
| 2367 | if (! GDM_IS_XDMCP_DISPLAY (display)) { |
---|
| 2368 | return FALSE; |
---|
| 2369 | } |
---|
| 2370 | |
---|
| 2371 | session_id = gdm_xdmcp_display_get_session_number (GDM_XDMCP_DISPLAY (display)); |
---|
| 2372 | |
---|
| 2373 | if (session_id == sessid) { |
---|
| 2374 | return TRUE; |
---|
| 2375 | } |
---|
| 2376 | |
---|
| 2377 | return FALSE; |
---|
| 2378 | } |
---|
| 2379 | |
---|
| 2380 | static GdmDisplay * |
---|
| 2381 | gdm_xdmcp_display_lookup (GdmXdmcpDisplayFactory *factory, |
---|
| 2382 | CARD32 sessid) |
---|
| 2383 | { |
---|
| 2384 | GdmDisplay *display; |
---|
| 2385 | GdmDisplayStore *store; |
---|
| 2386 | |
---|
| 2387 | if (sessid == 0) { |
---|
| 2388 | return NULL; |
---|
| 2389 | } |
---|
| 2390 | |
---|
| 2391 | store = gdm_display_factory_get_display_store (GDM_DISPLAY_FACTORY (factory)); |
---|
| 2392 | display = gdm_display_store_find (store, |
---|
| 2393 | (GdmDisplayStoreFunc)lookup_by_session_id, |
---|
| 2394 | GINT_TO_POINTER (sessid)); |
---|
| 2395 | |
---|
| 2396 | return display; |
---|
| 2397 | } |
---|
| 2398 | |
---|
| 2399 | static void |
---|
| 2400 | gdm_xdmcp_send_failed (GdmXdmcpDisplayFactory *factory, |
---|
| 2401 | GdmAddress *address, |
---|
| 2402 | CARD32 sessid) |
---|
| 2403 | { |
---|
| 2404 | XdmcpHeader header; |
---|
| 2405 | ARRAY8 status; |
---|
| 2406 | |
---|
| 2407 | g_debug ("GdmXdmcpDisplayFactory: Sending FAILED to %ld", (long)sessid); |
---|
| 2408 | |
---|
| 2409 | /* |
---|
| 2410 | * Don't translate, this goes over the wire to servers where we |
---|
| 2411 | * don't know the charset or language, so it must be ascii |
---|
| 2412 | */ |
---|
| 2413 | status.data = (CARD8 *) "Failed to start session"; |
---|
| 2414 | status.length = strlen ((char *) status.data); |
---|
| 2415 | |
---|
| 2416 | header.version = XDM_PROTOCOL_VERSION; |
---|
| 2417 | header.opcode = (CARD16) FAILED; |
---|
| 2418 | header.length = 6 + status.length; |
---|
| 2419 | |
---|
| 2420 | XdmcpWriteHeader (&factory->priv->buf, &header); |
---|
| 2421 | XdmcpWriteCARD32 (&factory->priv->buf, sessid); |
---|
| 2422 | XdmcpWriteARRAY8 (&factory->priv->buf, &status); |
---|
| 2423 | |
---|
| 2424 | XdmcpFlush (factory->priv->socket_fd, |
---|
| 2425 | &factory->priv->buf, |
---|
| 2426 | (XdmcpNetaddr)gdm_address_peek_sockaddr_storage (address), |
---|
| 2427 | (int)sizeof (struct sockaddr_storage)); |
---|
| 2428 | } |
---|
| 2429 | |
---|
| 2430 | static void |
---|
| 2431 | gdm_xdmcp_send_refuse (GdmXdmcpDisplayFactory *factory, |
---|
| 2432 | GdmAddress *address, |
---|
| 2433 | CARD32 sessid) |
---|
| 2434 | { |
---|
| 2435 | XdmcpHeader header; |
---|
| 2436 | ForwardQuery *fq; |
---|
| 2437 | |
---|
| 2438 | g_debug ("GdmXdmcpDisplayFactory: Sending REFUSE to %ld", |
---|
| 2439 | (long)sessid); |
---|
| 2440 | |
---|
| 2441 | header.version = XDM_PROTOCOL_VERSION; |
---|
| 2442 | header.opcode = (CARD16) REFUSE; |
---|
| 2443 | header.length = 4; |
---|
| 2444 | |
---|
| 2445 | XdmcpWriteHeader (&factory->priv->buf, &header); |
---|
| 2446 | XdmcpWriteCARD32 (&factory->priv->buf, sessid); |
---|
| 2447 | |
---|
| 2448 | XdmcpFlush (factory->priv->socket_fd, |
---|
| 2449 | &factory->priv->buf, |
---|
| 2450 | (XdmcpNetaddr)gdm_address_peek_sockaddr_storage (address), |
---|
| 2451 | (int)sizeof (struct sockaddr_storage)); |
---|
| 2452 | |
---|
| 2453 | /* |
---|
| 2454 | * This was from a forwarded query quite apparently so |
---|
| 2455 | * send MANAGED_FORWARD |
---|
| 2456 | */ |
---|
| 2457 | fq = forward_query_lookup (factory, address); |
---|
| 2458 | if (fq != NULL) { |
---|
| 2459 | gdm_xdmcp_send_managed_forward (factory, fq->from_address, address); |
---|
| 2460 | forward_query_destroy (factory, fq); |
---|
| 2461 | } |
---|
| 2462 | } |
---|
| 2463 | |
---|
| 2464 | static void |
---|
| 2465 | gdm_xdmcp_handle_manage (GdmXdmcpDisplayFactory *factory, |
---|
| 2466 | GdmAddress *address, |
---|
| 2467 | int len) |
---|
| 2468 | { |
---|
| 2469 | CARD32 clnt_sessid; |
---|
| 2470 | CARD16 clnt_dspnum; |
---|
| 2471 | ARRAY8 clnt_dspclass; |
---|
| 2472 | GdmDisplay *display; |
---|
| 2473 | ForwardQuery *fq; |
---|
| 2474 | char *host; |
---|
| 2475 | |
---|
| 2476 | host = NULL; |
---|
| 2477 | gdm_address_get_numeric_info (address, &host, NULL); |
---|
| 2478 | g_debug ("GdmXdmcpDisplayFactory: Got MANAGE from %s", host); |
---|
| 2479 | |
---|
| 2480 | /* Check with tcp_wrappers if client is allowed to access */ |
---|
| 2481 | if (! gdm_xdmcp_host_allow (address)) { |
---|
| 2482 | g_warning (_("%s: Got Manage from banned host %s"), |
---|
| 2483 | "gdm_xdmcp_handle_manage", |
---|
| 2484 | host); |
---|
| 2485 | g_free (host); |
---|
| 2486 | return; |
---|
| 2487 | } |
---|
| 2488 | |
---|
| 2489 | /* SessionID */ |
---|
| 2490 | if G_UNLIKELY (! XdmcpReadCARD32 (&factory->priv->buf, &clnt_sessid)) { |
---|
| 2491 | g_warning (_("%s: Could not read Session ID"), |
---|
| 2492 | "gdm_xdmcp_handle_manage"); |
---|
| 2493 | goto out; |
---|
| 2494 | } |
---|
| 2495 | |
---|
| 2496 | /* Remote display number */ |
---|
| 2497 | if G_UNLIKELY (! XdmcpReadCARD16 (&factory->priv->buf, &clnt_dspnum)) { |
---|
| 2498 | g_warning (_("%s: Could not read Display Number"), |
---|
| 2499 | "gdm_xdmcp_handle_manage"); |
---|
| 2500 | goto out; |
---|
| 2501 | } |
---|
| 2502 | |
---|
| 2503 | /* Display Class */ |
---|
| 2504 | if G_UNLIKELY (! XdmcpReadARRAY8 (&factory->priv->buf, &clnt_dspclass)) { |
---|
| 2505 | g_warning (_("%s: Could not read Display Class"), |
---|
| 2506 | "gdm_xdmcp_handle_manage"); |
---|
| 2507 | goto out; |
---|
| 2508 | } |
---|
| 2509 | |
---|
| 2510 | { |
---|
| 2511 | char *s = g_strndup ((char *) clnt_dspclass.data, clnt_dspclass.length); |
---|
| 2512 | g_debug ("GdmXdmcpDisplayFactory: Got display=%d, SessionID=%ld Class=%s from %s", |
---|
| 2513 | (int)clnt_dspnum, |
---|
| 2514 | (long)clnt_sessid, |
---|
| 2515 | s != NULL ? s : "", |
---|
| 2516 | host); |
---|
| 2517 | |
---|
| 2518 | g_free (s); |
---|
| 2519 | } |
---|
| 2520 | |
---|
| 2521 | display = gdm_xdmcp_display_lookup (factory, clnt_sessid); |
---|
| 2522 | if (display != NULL && |
---|
| 2523 | gdm_display_get_status (display) == GDM_DISPLAY_PREPARED) { |
---|
| 2524 | char *name; |
---|
| 2525 | |
---|
| 2526 | name = NULL; |
---|
| 2527 | gdm_display_get_x11_display_name (display, &name, NULL); |
---|
| 2528 | g_debug ("GdmXdmcpDisplayFactory: Looked up %s", name); |
---|
| 2529 | g_free (name); |
---|
| 2530 | |
---|
| 2531 | if (factory->priv->honor_indirect) { |
---|
| 2532 | IndirectClient *ic; |
---|
| 2533 | |
---|
| 2534 | ic = indirect_client_lookup (factory, address); |
---|
| 2535 | |
---|
| 2536 | /* This was an indirect thingie and nothing was yet chosen, |
---|
| 2537 | * use a chooser */ |
---|
| 2538 | if (ic != NULL && ic->chosen_address == NULL) { |
---|
| 2539 | g_debug ("GdmXdmcpDisplayFactory: use chooser"); |
---|
| 2540 | /*d->use_chooser = TRUE; |
---|
| 2541 | d->indirect_id = ic->id;*/ |
---|
| 2542 | } else { |
---|
| 2543 | /*d->indirect_id = 0; |
---|
| 2544 | d->use_chooser = FALSE;*/ |
---|
| 2545 | if (ic != NULL) { |
---|
| 2546 | indirect_client_destroy (factory, ic); |
---|
| 2547 | } |
---|
| 2548 | } |
---|
| 2549 | } else { |
---|
| 2550 | |
---|
| 2551 | } |
---|
| 2552 | |
---|
| 2553 | /* this was from a forwarded query quite apparently so |
---|
| 2554 | * send MANAGED_FORWARD */ |
---|
| 2555 | fq = forward_query_lookup (factory, address); |
---|
| 2556 | if (fq != NULL) { |
---|
| 2557 | gdm_xdmcp_send_managed_forward (factory, fq->from_address, address); |
---|
| 2558 | forward_query_destroy (factory, fq); |
---|
| 2559 | } |
---|
| 2560 | |
---|
| 2561 | factory->priv->num_sessions++; |
---|
| 2562 | factory->priv->num_pending_sessions--; |
---|
| 2563 | |
---|
| 2564 | /* Start greeter/session */ |
---|
| 2565 | if (! gdm_display_manage (display)) { |
---|
| 2566 | gdm_xdmcp_send_failed (factory, address, clnt_sessid); |
---|
| 2567 | g_debug ("GdmXdmcpDisplayFactory: Failed to manage display"); |
---|
| 2568 | } |
---|
| 2569 | } else if (display != NULL && |
---|
| 2570 | gdm_display_get_status (display) == GDM_DISPLAY_MANAGED) { |
---|
| 2571 | g_debug ("GdmXdmcpDisplayFactory: Session id %ld already managed", |
---|
| 2572 | (long)clnt_sessid); |
---|
| 2573 | } else { |
---|
| 2574 | g_warning ("GdmXdmcpDisplayFactory: Failed to look up session id %ld", |
---|
| 2575 | (long)clnt_sessid); |
---|
| 2576 | gdm_xdmcp_send_refuse (factory, address, clnt_sessid); |
---|
| 2577 | } |
---|
| 2578 | |
---|
| 2579 | out: |
---|
| 2580 | XdmcpDisposeARRAY8 (&clnt_dspclass); |
---|
| 2581 | g_free (host); |
---|
| 2582 | } |
---|
| 2583 | |
---|
| 2584 | static void |
---|
| 2585 | gdm_xdmcp_handle_managed_forward (GdmXdmcpDisplayFactory *factory, |
---|
| 2586 | GdmAddress *address, |
---|
| 2587 | int len) |
---|
| 2588 | { |
---|
| 2589 | ARRAY8 clnt_address; |
---|
| 2590 | char *host; |
---|
| 2591 | GdmAddress *disp_address; |
---|
| 2592 | IndirectClient *ic; |
---|
| 2593 | |
---|
| 2594 | host = NULL; |
---|
| 2595 | gdm_address_get_numeric_info (address, &host, NULL); |
---|
| 2596 | g_debug ("GdmXdmcpDisplayFactory: Got MANAGED_FORWARD from %s", |
---|
| 2597 | host); |
---|
| 2598 | |
---|
| 2599 | /* Check with tcp_wrappers if client is allowed to access */ |
---|
| 2600 | if (! gdm_xdmcp_host_allow (address)) { |
---|
| 2601 | g_warning ("GdmXdmcpDisplayFactory: Got MANAGED_FORWARD from banned host %s", |
---|
| 2602 | host); |
---|
| 2603 | g_free (host); |
---|
| 2604 | return; |
---|
| 2605 | } |
---|
| 2606 | g_free (host); |
---|
| 2607 | |
---|
| 2608 | /* Hostname */ |
---|
| 2609 | if G_UNLIKELY ( ! XdmcpReadARRAY8 (&factory->priv->buf, &clnt_address)) { |
---|
| 2610 | g_warning (_("%s: Could not read address"), |
---|
| 2611 | "gdm_xdmcp_handle_managed_forward"); |
---|
| 2612 | return; |
---|
| 2613 | } |
---|
| 2614 | |
---|
| 2615 | disp_address = NULL; |
---|
| 2616 | if (! create_address_from_request (&clnt_address, NULL, gdm_address_get_family_type (address), &disp_address)) { |
---|
| 2617 | g_warning ("Unable to parse address for request"); |
---|
| 2618 | XdmcpDisposeARRAY8 (&clnt_address); |
---|
| 2619 | return; |
---|
| 2620 | } |
---|
| 2621 | |
---|
| 2622 | ic = indirect_client_lookup_by_chosen (factory, address, disp_address); |
---|
| 2623 | if (ic != NULL) { |
---|
| 2624 | indirect_client_destroy (factory, ic); |
---|
| 2625 | } |
---|
| 2626 | |
---|
| 2627 | /* Note: we send GOT even on not found, just in case our previous |
---|
| 2628 | * didn't get through and this was a second managed forward */ |
---|
| 2629 | gdm_xdmcp_send_got_managed_forward (factory, address, disp_address); |
---|
| 2630 | |
---|
| 2631 | gdm_address_free (disp_address); |
---|
| 2632 | |
---|
| 2633 | XdmcpDisposeARRAY8 (&clnt_address); |
---|
| 2634 | } |
---|
| 2635 | |
---|
| 2636 | static void |
---|
| 2637 | gdm_xdmcp_handle_got_managed_forward (GdmXdmcpDisplayFactory *factory, |
---|
| 2638 | GdmAddress *address, |
---|
| 2639 | int len) |
---|
| 2640 | { |
---|
| 2641 | GdmAddress *disp_address; |
---|
| 2642 | ARRAY8 clnt_address; |
---|
| 2643 | char *host; |
---|
| 2644 | |
---|
| 2645 | host = NULL; |
---|
| 2646 | gdm_address_get_numeric_info (address, &host, NULL); |
---|
| 2647 | g_debug ("GdmXdmcpDisplayFactory: Got MANAGED_FORWARD from %s", |
---|
| 2648 | host); |
---|
| 2649 | |
---|
| 2650 | if (! gdm_xdmcp_host_allow (address)) { |
---|
| 2651 | g_warning ("%s: Got GOT_MANAGED_FORWARD from banned host %s", |
---|
| 2652 | "gdm_xdmcp_handle_request", host); |
---|
| 2653 | g_free (host); |
---|
| 2654 | return; |
---|
| 2655 | } |
---|
| 2656 | g_free (host); |
---|
| 2657 | |
---|
| 2658 | /* Hostname */ |
---|
| 2659 | if G_UNLIKELY ( ! XdmcpReadARRAY8 (&factory->priv->buf, &clnt_address)) { |
---|
| 2660 | g_warning (_("%s: Could not read address"), |
---|
| 2661 | "gdm_xdmcp_handle_got_managed_forward"); |
---|
| 2662 | return; |
---|
| 2663 | } |
---|
| 2664 | |
---|
| 2665 | if (! create_address_from_request (&clnt_address, NULL, gdm_address_get_family_type (address), &disp_address)) { |
---|
| 2666 | g_warning (_("%s: Could not read address"), |
---|
| 2667 | "gdm_xdmcp_handle_got_managed_forward"); |
---|
| 2668 | XdmcpDisposeARRAY8 (&clnt_address); |
---|
| 2669 | return; |
---|
| 2670 | } |
---|
| 2671 | |
---|
| 2672 | gdm_xdmcp_whack_queued_managed_forwards (factory, address, disp_address); |
---|
| 2673 | |
---|
| 2674 | gdm_address_free (disp_address); |
---|
| 2675 | |
---|
| 2676 | XdmcpDisposeARRAY8 (&clnt_address); |
---|
| 2677 | } |
---|
| 2678 | |
---|
| 2679 | static void |
---|
| 2680 | gdm_xdmcp_send_alive (GdmXdmcpDisplayFactory *factory, |
---|
| 2681 | GdmAddress *address, |
---|
| 2682 | CARD16 dspnum, |
---|
| 2683 | CARD32 sessid) |
---|
| 2684 | { |
---|
| 2685 | XdmcpHeader header; |
---|
| 2686 | GdmDisplay *display; |
---|
| 2687 | int send_running = 0; |
---|
| 2688 | CARD32 send_sessid = 0; |
---|
| 2689 | |
---|
| 2690 | display = gdm_xdmcp_display_lookup (factory, sessid); |
---|
| 2691 | if (display == NULL) { |
---|
| 2692 | display = gdm_xdmcp_display_lookup_by_host (factory, address, dspnum); |
---|
| 2693 | } |
---|
| 2694 | |
---|
| 2695 | if (display != NULL) { |
---|
| 2696 | int status; |
---|
| 2697 | |
---|
| 2698 | send_sessid = gdm_xdmcp_display_get_session_number (GDM_XDMCP_DISPLAY (display)); |
---|
| 2699 | status = gdm_display_get_status (display); |
---|
| 2700 | |
---|
| 2701 | if (status == GDM_DISPLAY_MANAGED) { |
---|
| 2702 | send_running = 1; |
---|
| 2703 | } |
---|
| 2704 | } |
---|
| 2705 | |
---|
| 2706 | g_debug ("GdmXdmcpDisplayFactory: Sending ALIVE to %ld (running %d, sessid %ld)", |
---|
| 2707 | (long)sessid, |
---|
| 2708 | send_running, |
---|
| 2709 | (long)send_sessid); |
---|
| 2710 | |
---|
| 2711 | header.version = XDM_PROTOCOL_VERSION; |
---|
| 2712 | header.opcode = (CARD16) ALIVE; |
---|
| 2713 | header.length = 5; |
---|
| 2714 | |
---|
| 2715 | XdmcpWriteHeader (&factory->priv->buf, &header); |
---|
| 2716 | XdmcpWriteCARD8 (&factory->priv->buf, send_running); |
---|
| 2717 | XdmcpWriteCARD32 (&factory->priv->buf, send_sessid); |
---|
| 2718 | |
---|
| 2719 | XdmcpFlush (factory->priv->socket_fd, |
---|
| 2720 | &factory->priv->buf, |
---|
| 2721 | (XdmcpNetaddr)gdm_address_peek_sockaddr_storage (address), |
---|
| 2722 | (int)sizeof (struct sockaddr_storage)); |
---|
| 2723 | } |
---|
| 2724 | |
---|
| 2725 | static void |
---|
| 2726 | gdm_xdmcp_handle_keepalive (GdmXdmcpDisplayFactory *factory, |
---|
| 2727 | GdmAddress *address, |
---|
| 2728 | int len) |
---|
| 2729 | { |
---|
| 2730 | CARD16 clnt_dspnum; |
---|
| 2731 | CARD32 clnt_sessid; |
---|
| 2732 | char *host; |
---|
| 2733 | |
---|
| 2734 | host = NULL; |
---|
| 2735 | gdm_address_get_numeric_info (address, &host, NULL); |
---|
| 2736 | g_debug ("GdmXdmcpDisplayFactory: Got KEEPALIVE from %s", host); |
---|
| 2737 | |
---|
| 2738 | /* Check with tcp_wrappers if client is allowed to access */ |
---|
| 2739 | if (! gdm_xdmcp_host_allow (address)) { |
---|
| 2740 | g_warning (_("%s: Got KEEPALIVE from banned host %s"), |
---|
| 2741 | "gdm_xdmcp_handle_keepalive", |
---|
| 2742 | host); |
---|
| 2743 | g_free (host); |
---|
| 2744 | return; |
---|
| 2745 | } |
---|
| 2746 | g_free (host); |
---|
| 2747 | |
---|
| 2748 | /* Remote display number */ |
---|
| 2749 | if G_UNLIKELY (! XdmcpReadCARD16 (&factory->priv->buf, &clnt_dspnum)) { |
---|
| 2750 | g_warning (_("%s: Could not read Display Number"), |
---|
| 2751 | "gdm_xdmcp_handle_keepalive"); |
---|
| 2752 | return; |
---|
| 2753 | } |
---|
| 2754 | |
---|
| 2755 | /* SessionID */ |
---|
| 2756 | if G_UNLIKELY (! XdmcpReadCARD32 (&factory->priv->buf, &clnt_sessid)) { |
---|
| 2757 | g_warning (_("%s: Could not read Session ID"), |
---|
| 2758 | "gdm_xdmcp_handle_keepalive"); |
---|
| 2759 | return; |
---|
| 2760 | } |
---|
| 2761 | |
---|
| 2762 | gdm_xdmcp_send_alive (factory, address, clnt_dspnum, clnt_sessid); |
---|
| 2763 | } |
---|
| 2764 | |
---|
| 2765 | static const char * |
---|
| 2766 | opcode_string (int opcode) |
---|
| 2767 | { |
---|
| 2768 | static const char * const opcode_names[] = { |
---|
| 2769 | NULL, |
---|
| 2770 | "BROADCAST_QUERY", |
---|
| 2771 | "QUERY", |
---|
| 2772 | "INDIRECT_QUERY", |
---|
| 2773 | "FORWARD_QUERY", |
---|
| 2774 | "WILLING", |
---|
| 2775 | "UNWILLING", |
---|
| 2776 | "REQUEST", |
---|
| 2777 | "ACCEPT", |
---|
| 2778 | "DECLINE", |
---|
| 2779 | "MANAGE", |
---|
| 2780 | "REFUSE", |
---|
| 2781 | "FAILED", |
---|
| 2782 | "KEEPALIVE", |
---|
| 2783 | "ALIVE" |
---|
| 2784 | }; |
---|
| 2785 | static const char * const gdm_opcode_names[] = { |
---|
| 2786 | "MANAGED_FORWARD", |
---|
| 2787 | "GOT_MANAGED_FORWARD" |
---|
| 2788 | }; |
---|
| 2789 | |
---|
| 2790 | |
---|
| 2791 | if (opcode < G_N_ELEMENTS (opcode_names)) { |
---|
| 2792 | return opcode_names [opcode]; |
---|
| 2793 | } else if (opcode >= GDM_XDMCP_FIRST_OPCODE && |
---|
| 2794 | opcode < GDM_XDMCP_LAST_OPCODE) { |
---|
| 2795 | return gdm_opcode_names [opcode - GDM_XDMCP_FIRST_OPCODE]; |
---|
| 2796 | } else { |
---|
| 2797 | return "UNKNOWN"; |
---|
| 2798 | } |
---|
| 2799 | } |
---|
| 2800 | |
---|
| 2801 | static gboolean |
---|
| 2802 | decode_packet (GIOChannel *source, |
---|
| 2803 | GIOCondition cond, |
---|
| 2804 | GdmXdmcpDisplayFactory *factory) |
---|
| 2805 | { |
---|
| 2806 | struct sockaddr_storage clnt_ss; |
---|
| 2807 | GdmAddress *address; |
---|
| 2808 | gint ss_len; |
---|
| 2809 | XdmcpHeader header; |
---|
| 2810 | char *host; |
---|
| 2811 | char *port; |
---|
| 2812 | int res; |
---|
| 2813 | |
---|
| 2814 | g_debug ("GdmXdmcpDisplayFactory: decode_packet: GIOCondition %d", (int)cond); |
---|
| 2815 | |
---|
| 2816 | if ( ! (cond & G_IO_IN)) { |
---|
| 2817 | return TRUE; |
---|
| 2818 | } |
---|
| 2819 | |
---|
| 2820 | ss_len = sizeof (clnt_ss); |
---|
| 2821 | res = XdmcpFill (factory->priv->socket_fd, &factory->priv->buf, (XdmcpNetaddr)&clnt_ss, &ss_len); |
---|
| 2822 | if G_UNLIKELY (! res) { |
---|
| 2823 | g_debug ("GdmXdmcpDisplayFactory: Could not create XDMCP buffer!"); |
---|
| 2824 | return TRUE; |
---|
| 2825 | } |
---|
| 2826 | |
---|
| 2827 | res = XdmcpReadHeader (&factory->priv->buf, &header); |
---|
| 2828 | if G_UNLIKELY (! res) { |
---|
| 2829 | g_warning (_("GdmXdmcpDisplayFactory: Could not read XDMCP header!")); |
---|
| 2830 | return TRUE; |
---|
| 2831 | } |
---|
| 2832 | |
---|
| 2833 | if G_UNLIKELY (header.version != XDM_PROTOCOL_VERSION && |
---|
| 2834 | header.version != GDM_XDMCP_PROTOCOL_VERSION) { |
---|
| 2835 | g_warning (_("XMDCP: Incorrect XDMCP version!")); |
---|
| 2836 | return TRUE; |
---|
| 2837 | } |
---|
| 2838 | |
---|
| 2839 | address = gdm_address_new_from_sockaddr ((struct sockaddr *) &clnt_ss, ss_len); |
---|
| 2840 | if (address == NULL) { |
---|
| 2841 | g_warning (_("XMDCP: Unable to parse address")); |
---|
| 2842 | return TRUE; |
---|
| 2843 | } |
---|
| 2844 | |
---|
| 2845 | gdm_address_debug (address); |
---|
| 2846 | |
---|
| 2847 | host = NULL; |
---|
| 2848 | port = NULL; |
---|
| 2849 | gdm_address_get_numeric_info (address, &host, &port); |
---|
| 2850 | |
---|
| 2851 | g_debug ("GdmXdmcpDisplayFactory: Received opcode %s from client %s : %s", |
---|
| 2852 | opcode_string (header.opcode), |
---|
| 2853 | host, |
---|
| 2854 | port); |
---|
| 2855 | |
---|
| 2856 | switch (header.opcode) { |
---|
| 2857 | case BROADCAST_QUERY: |
---|
| 2858 | gdm_xdmcp_handle_broadcast_query (factory, address, header.length); |
---|
| 2859 | break; |
---|
| 2860 | |
---|
| 2861 | case QUERY: |
---|
| 2862 | gdm_xdmcp_handle_query (factory, address, header.length); |
---|
| 2863 | break; |
---|
| 2864 | |
---|
| 2865 | case INDIRECT_QUERY: |
---|
| 2866 | gdm_xdmcp_handle_indirect_query (factory, address, header.length); |
---|
| 2867 | break; |
---|
| 2868 | |
---|
| 2869 | case FORWARD_QUERY: |
---|
| 2870 | gdm_xdmcp_handle_forward_query (factory, address, header.length); |
---|
| 2871 | break; |
---|
| 2872 | |
---|
| 2873 | case REQUEST: |
---|
| 2874 | gdm_xdmcp_handle_request (factory, address, header.length); |
---|
| 2875 | break; |
---|
| 2876 | |
---|
| 2877 | case MANAGE: |
---|
| 2878 | gdm_xdmcp_handle_manage (factory, address, header.length); |
---|
| 2879 | break; |
---|
| 2880 | |
---|
| 2881 | case KEEPALIVE: |
---|
| 2882 | gdm_xdmcp_handle_keepalive (factory, address, header.length); |
---|
| 2883 | break; |
---|
| 2884 | |
---|
| 2885 | case GDM_XDMCP_MANAGED_FORWARD: |
---|
| 2886 | gdm_xdmcp_handle_managed_forward (factory, address, header.length); |
---|
| 2887 | break; |
---|
| 2888 | |
---|
| 2889 | case GDM_XDMCP_GOT_MANAGED_FORWARD: |
---|
| 2890 | gdm_xdmcp_handle_got_managed_forward (factory, address, header.length); |
---|
| 2891 | break; |
---|
| 2892 | |
---|
| 2893 | default: |
---|
| 2894 | g_debug ("GdmXdmcpDisplayFactory: Unknown opcode from client %s : %s", |
---|
| 2895 | host, |
---|
| 2896 | port); |
---|
| 2897 | |
---|
| 2898 | break; |
---|
| 2899 | } |
---|
| 2900 | |
---|
| 2901 | g_free (host); |
---|
| 2902 | g_free (port); |
---|
| 2903 | |
---|
| 2904 | gdm_address_free (address); |
---|
| 2905 | |
---|
| 2906 | return TRUE; |
---|
| 2907 | } |
---|
| 2908 | |
---|
| 2909 | static gboolean |
---|
| 2910 | gdm_xdmcp_display_factory_start (GdmDisplayFactory *base_factory) |
---|
| 2911 | { |
---|
| 2912 | gboolean ret; |
---|
| 2913 | GIOChannel *ioc; |
---|
| 2914 | GdmXdmcpDisplayFactory *factory = GDM_XDMCP_DISPLAY_FACTORY (base_factory); |
---|
| 2915 | gboolean res; |
---|
| 2916 | |
---|
| 2917 | g_return_val_if_fail (GDM_IS_XDMCP_DISPLAY_FACTORY (factory), FALSE); |
---|
| 2918 | g_return_val_if_fail (factory->priv->socket_fd == -1, FALSE); |
---|
| 2919 | |
---|
| 2920 | /* read configuration */ |
---|
| 2921 | res = gdm_settings_direct_get_uint (GDM_KEY_UDP_PORT, |
---|
| 2922 | &(factory->priv->port)); |
---|
| 2923 | res = gdm_settings_direct_get_boolean (GDM_KEY_MULTICAST, |
---|
| 2924 | &(factory->priv->use_multicast)); |
---|
| 2925 | res = gdm_settings_direct_get_string (GDM_KEY_MULTICAST_ADDR, |
---|
| 2926 | &(factory->priv->multicast_address)); |
---|
| 2927 | res = gdm_settings_direct_get_boolean (GDM_KEY_INDIRECT, |
---|
| 2928 | &(factory->priv->honor_indirect)); |
---|
| 2929 | res = gdm_settings_direct_get_uint (GDM_KEY_DISPLAYS_PER_HOST, |
---|
| 2930 | &(factory->priv->max_displays_per_host)); |
---|
| 2931 | res = gdm_settings_direct_get_uint (GDM_KEY_MAX_SESSIONS, |
---|
| 2932 | &(factory->priv->max_displays)); |
---|
| 2933 | res = gdm_settings_direct_get_uint (GDM_KEY_MAX_PENDING, |
---|
| 2934 | &(factory->priv->max_pending_displays)); |
---|
| 2935 | res = gdm_settings_direct_get_uint (GDM_KEY_MAX_WAIT, |
---|
| 2936 | &(factory->priv->max_wait)); |
---|
| 2937 | res = gdm_settings_direct_get_uint (GDM_KEY_MAX_WAIT_INDIRECT, |
---|
| 2938 | &(factory->priv->max_wait_indirect)); |
---|
| 2939 | res = gdm_settings_direct_get_string (GDM_KEY_WILLING, |
---|
| 2940 | &(factory->priv->willing_script)); |
---|
| 2941 | |
---|
| 2942 | ret = open_port (factory); |
---|
| 2943 | if (! ret) { |
---|
| 2944 | return ret; |
---|
| 2945 | } |
---|
| 2946 | |
---|
| 2947 | g_debug ("GdmXdmcpDisplayFactory: Starting to listen on XDMCP port"); |
---|
| 2948 | |
---|
| 2949 | ioc = g_io_channel_unix_new (factory->priv->socket_fd); |
---|
| 2950 | |
---|
| 2951 | g_io_channel_set_encoding (ioc, NULL, NULL); |
---|
| 2952 | g_io_channel_set_buffered (ioc, FALSE); |
---|
| 2953 | |
---|
| 2954 | factory->priv->socket_watch_id = g_io_add_watch_full (ioc, |
---|
| 2955 | G_PRIORITY_DEFAULT, |
---|
| 2956 | G_IO_IN | G_IO_PRI | G_IO_ERR | G_IO_HUP | G_IO_NVAL, |
---|
| 2957 | (GIOFunc)decode_packet, |
---|
| 2958 | factory, |
---|
| 2959 | NULL); |
---|
| 2960 | g_io_channel_unref (ioc); |
---|
| 2961 | |
---|
| 2962 | return ret; |
---|
| 2963 | } |
---|
| 2964 | |
---|
| 2965 | static gboolean |
---|
| 2966 | gdm_xdmcp_display_factory_stop (GdmDisplayFactory *base_factory) |
---|
| 2967 | { |
---|
| 2968 | GdmXdmcpDisplayFactory *factory = GDM_XDMCP_DISPLAY_FACTORY (base_factory); |
---|
| 2969 | |
---|
| 2970 | g_return_val_if_fail (GDM_IS_XDMCP_DISPLAY_FACTORY (factory), FALSE); |
---|
| 2971 | g_return_val_if_fail (factory->priv->socket_fd != -1, FALSE); |
---|
| 2972 | |
---|
| 2973 | if (factory->priv->socket_watch_id > 0) { |
---|
| 2974 | g_source_remove (factory->priv->socket_watch_id); |
---|
| 2975 | factory->priv->socket_watch_id = 0; |
---|
| 2976 | } |
---|
| 2977 | |
---|
| 2978 | if (factory->priv->socket_fd > 0) { |
---|
| 2979 | VE_IGNORE_EINTR (close (factory->priv->socket_fd)); |
---|
| 2980 | factory->priv->socket_fd = -1; |
---|
| 2981 | } |
---|
| 2982 | |
---|
| 2983 | return TRUE; |
---|
| 2984 | } |
---|
| 2985 | |
---|
| 2986 | void |
---|
| 2987 | gdm_xdmcp_display_factory_set_port (GdmXdmcpDisplayFactory *factory, |
---|
| 2988 | guint port) |
---|
| 2989 | { |
---|
| 2990 | g_return_if_fail (GDM_IS_XDMCP_DISPLAY_FACTORY (factory)); |
---|
| 2991 | |
---|
| 2992 | factory->priv->port = port; |
---|
| 2993 | } |
---|
| 2994 | |
---|
| 2995 | static void |
---|
| 2996 | gdm_xdmcp_display_factory_set_use_multicast (GdmXdmcpDisplayFactory *factory, |
---|
| 2997 | gboolean use_multicast) |
---|
| 2998 | { |
---|
| 2999 | g_return_if_fail (GDM_IS_XDMCP_DISPLAY_FACTORY (factory)); |
---|
| 3000 | |
---|
| 3001 | factory->priv->use_multicast = use_multicast; |
---|
| 3002 | } |
---|
| 3003 | |
---|
| 3004 | static void |
---|
| 3005 | gdm_xdmcp_display_factory_set_multicast_address (GdmXdmcpDisplayFactory *factory, |
---|
| 3006 | const char *address) |
---|
| 3007 | { |
---|
| 3008 | g_return_if_fail (GDM_IS_XDMCP_DISPLAY_FACTORY (factory)); |
---|
| 3009 | |
---|
| 3010 | g_free (factory->priv->multicast_address); |
---|
| 3011 | factory->priv->multicast_address = g_strdup (address); |
---|
| 3012 | } |
---|
| 3013 | |
---|
| 3014 | static void |
---|
| 3015 | gdm_xdmcp_display_factory_set_honor_indirect (GdmXdmcpDisplayFactory *factory, |
---|
| 3016 | gboolean honor_indirect) |
---|
| 3017 | { |
---|
| 3018 | g_return_if_fail (GDM_IS_XDMCP_DISPLAY_FACTORY (factory)); |
---|
| 3019 | |
---|
| 3020 | factory->priv->honor_indirect = honor_indirect; |
---|
| 3021 | } |
---|
| 3022 | |
---|
| 3023 | static void |
---|
| 3024 | gdm_xdmcp_display_factory_set_max_displays_per_host (GdmXdmcpDisplayFactory *factory, |
---|
| 3025 | guint num) |
---|
| 3026 | { |
---|
| 3027 | g_return_if_fail (GDM_IS_XDMCP_DISPLAY_FACTORY (factory)); |
---|
| 3028 | |
---|
| 3029 | factory->priv->max_displays_per_host = num; |
---|
| 3030 | } |
---|
| 3031 | |
---|
| 3032 | static void |
---|
| 3033 | gdm_xdmcp_display_factory_set_max_displays (GdmXdmcpDisplayFactory *factory, |
---|
| 3034 | guint num) |
---|
| 3035 | { |
---|
| 3036 | g_return_if_fail (GDM_IS_XDMCP_DISPLAY_FACTORY (factory)); |
---|
| 3037 | |
---|
| 3038 | factory->priv->max_displays = num; |
---|
| 3039 | } |
---|
| 3040 | |
---|
| 3041 | static void |
---|
| 3042 | gdm_xdmcp_display_factory_set_max_pending_displays (GdmXdmcpDisplayFactory *factory, |
---|
| 3043 | guint num) |
---|
| 3044 | { |
---|
| 3045 | g_return_if_fail (GDM_IS_XDMCP_DISPLAY_FACTORY (factory)); |
---|
| 3046 | |
---|
| 3047 | factory->priv->max_pending_displays = num; |
---|
| 3048 | } |
---|
| 3049 | |
---|
| 3050 | static void |
---|
| 3051 | gdm_xdmcp_display_factory_set_max_wait (GdmXdmcpDisplayFactory *factory, |
---|
| 3052 | guint num) |
---|
| 3053 | { |
---|
| 3054 | g_return_if_fail (GDM_IS_XDMCP_DISPLAY_FACTORY (factory)); |
---|
| 3055 | |
---|
| 3056 | factory->priv->max_wait = num; |
---|
| 3057 | } |
---|
| 3058 | |
---|
| 3059 | static void |
---|
| 3060 | gdm_xdmcp_display_factory_set_max_wait_indirect (GdmXdmcpDisplayFactory *factory, |
---|
| 3061 | guint num) |
---|
| 3062 | { |
---|
| 3063 | g_return_if_fail (GDM_IS_XDMCP_DISPLAY_FACTORY (factory)); |
---|
| 3064 | |
---|
| 3065 | factory->priv->max_wait_indirect = num; |
---|
| 3066 | } |
---|
| 3067 | |
---|
| 3068 | static void |
---|
| 3069 | gdm_xdmcp_display_factory_set_willing_script (GdmXdmcpDisplayFactory *factory, |
---|
| 3070 | const char *script) |
---|
| 3071 | { |
---|
| 3072 | g_return_if_fail (GDM_IS_XDMCP_DISPLAY_FACTORY (factory)); |
---|
| 3073 | |
---|
| 3074 | g_free (factory->priv->willing_script); |
---|
| 3075 | factory->priv->willing_script = g_strdup (script); |
---|
| 3076 | } |
---|
| 3077 | |
---|
| 3078 | static void |
---|
| 3079 | gdm_xdmcp_display_factory_set_property (GObject *object, |
---|
| 3080 | guint prop_id, |
---|
| 3081 | const GValue *value, |
---|
| 3082 | GParamSpec *pspec) |
---|
| 3083 | { |
---|
| 3084 | GdmXdmcpDisplayFactory *self; |
---|
| 3085 | |
---|
| 3086 | self = GDM_XDMCP_DISPLAY_FACTORY (object); |
---|
| 3087 | |
---|
| 3088 | switch (prop_id) { |
---|
| 3089 | case PROP_PORT: |
---|
| 3090 | gdm_xdmcp_display_factory_set_port (self, g_value_get_uint (value)); |
---|
| 3091 | break; |
---|
| 3092 | case PROP_USE_MULTICAST: |
---|
| 3093 | gdm_xdmcp_display_factory_set_use_multicast (self, g_value_get_boolean (value)); |
---|
| 3094 | break; |
---|
| 3095 | case PROP_MULTICAST_ADDRESS: |
---|
| 3096 | gdm_xdmcp_display_factory_set_multicast_address (self, g_value_get_string (value)); |
---|
| 3097 | break; |
---|
| 3098 | case PROP_HONOR_INDIRECT: |
---|
| 3099 | gdm_xdmcp_display_factory_set_honor_indirect (self, g_value_get_boolean (value)); |
---|
| 3100 | break; |
---|
| 3101 | case PROP_MAX_DISPLAYS_PER_HOST: |
---|
| 3102 | gdm_xdmcp_display_factory_set_max_displays_per_host (self, g_value_get_uint (value)); |
---|
| 3103 | break; |
---|
| 3104 | case PROP_MAX_DISPLAYS: |
---|
| 3105 | gdm_xdmcp_display_factory_set_max_displays (self, g_value_get_uint (value)); |
---|
| 3106 | break; |
---|
| 3107 | case PROP_MAX_PENDING_DISPLAYS: |
---|
| 3108 | gdm_xdmcp_display_factory_set_max_pending_displays (self, g_value_get_uint (value)); |
---|
| 3109 | break; |
---|
| 3110 | case PROP_MAX_WAIT: |
---|
| 3111 | gdm_xdmcp_display_factory_set_max_wait (self, g_value_get_uint (value)); |
---|
| 3112 | break; |
---|
| 3113 | case PROP_MAX_WAIT_INDIRECT: |
---|
| 3114 | gdm_xdmcp_display_factory_set_max_wait_indirect (self, g_value_get_uint (value)); |
---|
| 3115 | break; |
---|
| 3116 | case PROP_WILLING_SCRIPT: |
---|
| 3117 | gdm_xdmcp_display_factory_set_willing_script (self, g_value_get_string (value)); |
---|
| 3118 | break; |
---|
| 3119 | default: |
---|
| 3120 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
---|
| 3121 | break; |
---|
| 3122 | } |
---|
| 3123 | } |
---|
| 3124 | |
---|
| 3125 | static void |
---|
| 3126 | gdm_xdmcp_display_factory_get_property (GObject *object, |
---|
| 3127 | guint prop_id, |
---|
| 3128 | GValue *value, |
---|
| 3129 | GParamSpec *pspec) |
---|
| 3130 | { |
---|
| 3131 | GdmXdmcpDisplayFactory *self; |
---|
| 3132 | |
---|
| 3133 | self = GDM_XDMCP_DISPLAY_FACTORY (object); |
---|
| 3134 | |
---|
| 3135 | switch (prop_id) { |
---|
| 3136 | case PROP_PORT: |
---|
| 3137 | g_value_set_uint (value, self->priv->port); |
---|
| 3138 | break; |
---|
| 3139 | case PROP_USE_MULTICAST: |
---|
| 3140 | g_value_set_boolean (value, self->priv->use_multicast); |
---|
| 3141 | break; |
---|
| 3142 | case PROP_MULTICAST_ADDRESS: |
---|
| 3143 | g_value_set_string (value, self->priv->multicast_address); |
---|
| 3144 | break; |
---|
| 3145 | case PROP_HONOR_INDIRECT: |
---|
| 3146 | g_value_set_boolean (value, self->priv->honor_indirect); |
---|
| 3147 | break; |
---|
| 3148 | case PROP_MAX_DISPLAYS_PER_HOST: |
---|
| 3149 | g_value_set_uint (value, self->priv->max_displays_per_host); |
---|
| 3150 | break; |
---|
| 3151 | case PROP_MAX_DISPLAYS: |
---|
| 3152 | g_value_set_uint (value, self->priv->max_displays); |
---|
| 3153 | break; |
---|
| 3154 | case PROP_MAX_PENDING_DISPLAYS: |
---|
| 3155 | g_value_set_uint (value, self->priv->max_pending_displays); |
---|
| 3156 | break; |
---|
| 3157 | case PROP_MAX_WAIT: |
---|
| 3158 | g_value_set_uint (value, self->priv->max_wait); |
---|
| 3159 | break; |
---|
| 3160 | case PROP_MAX_WAIT_INDIRECT: |
---|
| 3161 | g_value_set_uint (value, self->priv->max_wait_indirect); |
---|
| 3162 | break; |
---|
| 3163 | case PROP_WILLING_SCRIPT: |
---|
| 3164 | g_value_set_string (value, self->priv->willing_script); |
---|
| 3165 | break; |
---|
| 3166 | default: |
---|
| 3167 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
---|
| 3168 | break; |
---|
| 3169 | } |
---|
| 3170 | } |
---|
| 3171 | |
---|
| 3172 | static void |
---|
| 3173 | gdm_xdmcp_display_factory_class_init (GdmXdmcpDisplayFactoryClass *klass) |
---|
| 3174 | { |
---|
| 3175 | GObjectClass *object_class = G_OBJECT_CLASS (klass); |
---|
| 3176 | GdmDisplayFactoryClass *factory_class = GDM_DISPLAY_FACTORY_CLASS (klass); |
---|
| 3177 | |
---|
| 3178 | object_class->get_property = gdm_xdmcp_display_factory_get_property; |
---|
| 3179 | object_class->set_property = gdm_xdmcp_display_factory_set_property; |
---|
| 3180 | object_class->finalize = gdm_xdmcp_display_factory_finalize; |
---|
| 3181 | |
---|
| 3182 | factory_class->start = gdm_xdmcp_display_factory_start; |
---|
| 3183 | factory_class->stop = gdm_xdmcp_display_factory_stop; |
---|
| 3184 | |
---|
| 3185 | g_object_class_install_property (object_class, |
---|
| 3186 | PROP_PORT, |
---|
| 3187 | g_param_spec_uint ("port", |
---|
| 3188 | "UDP port", |
---|
| 3189 | "UDP port", |
---|
| 3190 | 0, |
---|
| 3191 | G_MAXINT, |
---|
| 3192 | DEFAULT_PORT, |
---|
| 3193 | G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); |
---|
| 3194 | g_object_class_install_property (object_class, |
---|
| 3195 | PROP_USE_MULTICAST, |
---|
| 3196 | g_param_spec_boolean ("use-multicast", |
---|
| 3197 | NULL, |
---|
| 3198 | NULL, |
---|
| 3199 | DEFAULT_USE_MULTICAST, |
---|
| 3200 | G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); |
---|
| 3201 | g_object_class_install_property (object_class, |
---|
| 3202 | PROP_MULTICAST_ADDRESS, |
---|
| 3203 | g_param_spec_string ("multicast-address", |
---|
| 3204 | "multicast-address", |
---|
| 3205 | "multicast-address", |
---|
| 3206 | DEFAULT_MULTICAST_ADDRESS, |
---|
| 3207 | G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); |
---|
| 3208 | g_object_class_install_property (object_class, |
---|
| 3209 | PROP_HONOR_INDIRECT, |
---|
| 3210 | g_param_spec_boolean ("honor-indirect", |
---|
| 3211 | NULL, |
---|
| 3212 | NULL, |
---|
| 3213 | DEFAULT_HONOR_INDIRECT, |
---|
| 3214 | G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); |
---|
| 3215 | g_object_class_install_property (object_class, |
---|
| 3216 | PROP_WILLING_SCRIPT, |
---|
| 3217 | g_param_spec_string ("willing-script", |
---|
| 3218 | "willing-script", |
---|
| 3219 | "willing-script", |
---|
| 3220 | DEFAULT_WILLING_SCRIPT, |
---|
| 3221 | G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); |
---|
| 3222 | g_object_class_install_property (object_class, |
---|
| 3223 | PROP_MAX_DISPLAYS_PER_HOST, |
---|
| 3224 | g_param_spec_uint ("max-displays-per-host", |
---|
| 3225 | "max-displays-per-host", |
---|
| 3226 | "max-displays-per-host", |
---|
| 3227 | 0, |
---|
| 3228 | G_MAXINT, |
---|
| 3229 | DEFAULT_MAX_DISPLAYS_PER_HOST, |
---|
| 3230 | G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); |
---|
| 3231 | g_object_class_install_property (object_class, |
---|
| 3232 | PROP_MAX_DISPLAYS, |
---|
| 3233 | g_param_spec_uint ("max-displays", |
---|
| 3234 | "max-displays", |
---|
| 3235 | "max-displays", |
---|
| 3236 | 0, |
---|
| 3237 | G_MAXINT, |
---|
| 3238 | DEFAULT_MAX_DISPLAYS, |
---|
| 3239 | G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); |
---|
| 3240 | g_object_class_install_property (object_class, |
---|
| 3241 | PROP_MAX_PENDING_DISPLAYS, |
---|
| 3242 | g_param_spec_uint ("max-pending-displays", |
---|
| 3243 | "max-pending-displays", |
---|
| 3244 | "max-pending-displays", |
---|
| 3245 | 0, |
---|
| 3246 | G_MAXINT, |
---|
| 3247 | DEFAULT_MAX_PENDING_DISPLAYS, |
---|
| 3248 | G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); |
---|
| 3249 | g_object_class_install_property (object_class, |
---|
| 3250 | PROP_MAX_WAIT, |
---|
| 3251 | g_param_spec_uint ("max-wait", |
---|
| 3252 | "max-wait", |
---|
| 3253 | "max-wait", |
---|
| 3254 | 0, |
---|
| 3255 | G_MAXINT, |
---|
| 3256 | DEFAULT_MAX_WAIT, |
---|
| 3257 | G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); |
---|
| 3258 | g_object_class_install_property (object_class, |
---|
| 3259 | PROP_MAX_WAIT_INDIRECT, |
---|
| 3260 | g_param_spec_uint ("max-wait-indirect", |
---|
| 3261 | "max-wait-indirect", |
---|
| 3262 | "max-wait-indirect", |
---|
| 3263 | 0, |
---|
| 3264 | G_MAXINT, |
---|
| 3265 | DEFAULT_MAX_WAIT_INDIRECT, |
---|
| 3266 | G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); |
---|
| 3267 | |
---|
| 3268 | g_type_class_add_private (klass, sizeof (GdmXdmcpDisplayFactoryPrivate)); |
---|
| 3269 | } |
---|
| 3270 | |
---|
| 3271 | static void |
---|
| 3272 | gdm_xdmcp_display_factory_init (GdmXdmcpDisplayFactory *factory) |
---|
| 3273 | { |
---|
| 3274 | char hostbuf[1024]; |
---|
| 3275 | struct utsname name; |
---|
| 3276 | |
---|
| 3277 | factory->priv = GDM_XDMCP_DISPLAY_FACTORY_GET_PRIVATE (factory); |
---|
| 3278 | |
---|
| 3279 | factory->priv->socket_fd = -1; |
---|
| 3280 | |
---|
| 3281 | factory->priv->session_serial = g_random_int (); |
---|
| 3282 | |
---|
| 3283 | /* Fetch and store local hostname in XDMCP friendly format */ |
---|
| 3284 | hostbuf[1023] = '\0'; |
---|
| 3285 | if G_UNLIKELY (gethostname (hostbuf, 1023) != 0) { |
---|
| 3286 | g_warning (_("Could not get server hostname: %s!"), g_strerror (errno)); |
---|
| 3287 | strcpy (hostbuf, "localhost.localdomain"); |
---|
| 3288 | } |
---|
| 3289 | |
---|
| 3290 | uname (&name); |
---|
| 3291 | factory->priv->sysid = g_strconcat (name.sysname, |
---|
| 3292 | " ", |
---|
| 3293 | name.release, |
---|
| 3294 | NULL); |
---|
| 3295 | |
---|
| 3296 | factory->priv->hostname = g_strdup (hostbuf); |
---|
| 3297 | |
---|
| 3298 | factory->priv->servhost.data = (CARD8 *) g_strdup (hostbuf); |
---|
| 3299 | factory->priv->servhost.length = strlen ((char *) factory->priv->servhost.data); |
---|
| 3300 | } |
---|
| 3301 | |
---|
| 3302 | static void |
---|
| 3303 | gdm_xdmcp_display_factory_finalize (GObject *object) |
---|
| 3304 | { |
---|
| 3305 | GdmXdmcpDisplayFactory *factory; |
---|
| 3306 | |
---|
| 3307 | g_return_if_fail (object != NULL); |
---|
| 3308 | g_return_if_fail (GDM_IS_XDMCP_DISPLAY_FACTORY (object)); |
---|
| 3309 | |
---|
| 3310 | factory = GDM_XDMCP_DISPLAY_FACTORY (object); |
---|
| 3311 | |
---|
| 3312 | g_return_if_fail (factory->priv != NULL); |
---|
| 3313 | |
---|
| 3314 | if (factory->priv->socket_watch_id > 0) { |
---|
| 3315 | g_source_remove (factory->priv->socket_watch_id); |
---|
| 3316 | } |
---|
| 3317 | |
---|
| 3318 | if (factory->priv->socket_fd > 0) { |
---|
| 3319 | close (factory->priv->socket_fd); |
---|
| 3320 | factory->priv->socket_fd = -1; |
---|
| 3321 | } |
---|
| 3322 | |
---|
| 3323 | g_slist_free (factory->priv->forward_queries); |
---|
| 3324 | g_slist_free (factory->priv->managed_forwards); |
---|
| 3325 | |
---|
| 3326 | g_free (factory->priv->sysid); |
---|
| 3327 | g_free (factory->priv->hostname); |
---|
| 3328 | g_free (factory->priv->multicast_address); |
---|
| 3329 | g_free (factory->priv->willing_script); |
---|
| 3330 | |
---|
| 3331 | /* FIXME: Free servhost */ |
---|
| 3332 | |
---|
| 3333 | G_OBJECT_CLASS (gdm_xdmcp_display_factory_parent_class)->finalize (object); |
---|
| 3334 | } |
---|
| 3335 | |
---|
| 3336 | GdmXdmcpDisplayFactory * |
---|
| 3337 | gdm_xdmcp_display_factory_new (GdmDisplayStore *store) |
---|
| 3338 | { |
---|
| 3339 | if (xdmcp_display_factory_object != NULL) { |
---|
| 3340 | g_object_ref (xdmcp_display_factory_object); |
---|
| 3341 | } else { |
---|
| 3342 | xdmcp_display_factory_object = g_object_new (GDM_TYPE_XDMCP_DISPLAY_FACTORY, |
---|
| 3343 | "display-store", store, |
---|
| 3344 | NULL); |
---|
| 3345 | g_object_add_weak_pointer (xdmcp_display_factory_object, |
---|
| 3346 | (gpointer *) &xdmcp_display_factory_object); |
---|
| 3347 | } |
---|
| 3348 | |
---|
| 3349 | return GDM_XDMCP_DISPLAY_FACTORY (xdmcp_display_factory_object); |
---|
| 3350 | } |
---|