1 | /* -*- c-basic-offset: 8 -*-
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2 | rdesktop: A Remote Desktop Protocol client.
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3 | Protocol services - Clipboard functions
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4 | Copyright 2003 Erik Forsberg <forsberg@cendio.se> for Cendio AB
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5 | Copyright (C) Matthew Chapman <matthewc.unsw.edu.au> 2003-2008
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6 |
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7 | This program is free software: you can redistribute it and/or modify
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8 | it under the terms of the GNU General Public License as published by
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9 | the Free Software Foundation, either version 3 of the License, or
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10 | (at your option) any later version.
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11 |
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12 | This program is distributed in the hope that it will be useful,
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13 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | GNU General Public License for more details.
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16 |
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17 | You should have received a copy of the GNU General Public License
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18 | along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 |
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21 | /*
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22 | * Oracle GPL Disclaimer: For the avoidance of doubt, except that if any license choice
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23 | * other than GPL or LGPL is available it will apply instead, Oracle elects to use only
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24 | * the General Public License version 2 (GPLv2) at this time for any software where
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25 | * a choice of GPL license versions is made available with the language indicating
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26 | * that GPLv2 or any later version may be used, or where a choice of which version
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27 | * of the GPL is applied is otherwise unspecified.
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28 | */
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29 |
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30 | #include "rdesktop.h"
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31 |
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32 | #define CLIPRDR_CONNECT 1
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33 | #define CLIPRDR_FORMAT_ANNOUNCE 2
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34 | #define CLIPRDR_FORMAT_ACK 3
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35 | #define CLIPRDR_DATA_REQUEST 4
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36 | #define CLIPRDR_DATA_RESPONSE 5
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37 |
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38 | #define CLIPRDR_REQUEST 0
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39 | #define CLIPRDR_RESPONSE 1
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40 | #define CLIPRDR_ERROR 2
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41 |
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42 | static VCHANNEL *cliprdr_channel;
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43 |
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44 | static uint8 *last_formats = NULL;
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45 | static uint32 last_formats_length = 0;
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46 |
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47 | static void
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48 | cliprdr_send_packet(uint16 type, uint16 status, uint8 * data, uint32 length)
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49 | {
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50 | STREAM s;
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51 |
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52 | DEBUG_CLIPBOARD(("CLIPRDR send: type=%d, status=%d, length=%d\n", type, status, length));
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53 |
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54 | s = channel_init(cliprdr_channel, length + 12);
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55 | out_uint16_le(s, type);
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56 | out_uint16_le(s, status);
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57 | out_uint32_le(s, length);
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58 | out_uint8p(s, data, length);
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59 | out_uint32(s, 0); /* pad? */
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60 | s_mark_end(s);
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61 | channel_send(s, cliprdr_channel);
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62 | }
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63 |
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64 | /* Helper which announces our readiness to supply clipboard data
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65 | in a single format (such as CF_TEXT) to the RDP side.
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66 | To announce more than one format at a time, use
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67 | cliprdr_send_native_format_announce.
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68 | */
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69 | void
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70 | cliprdr_send_simple_native_format_announce(uint32 format)
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71 | {
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72 | uint8 buffer[36];
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73 |
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74 | DEBUG_CLIPBOARD(("cliprdr_send_simple_native_format_announce\n"));
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75 |
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76 | buf_out_uint32(buffer, format);
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77 | memset(buffer + 4, 0, sizeof(buffer) - 4); /* description */
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78 | cliprdr_send_native_format_announce(buffer, sizeof(buffer));
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79 | }
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80 |
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81 | /* Announces our readiness to supply clipboard data in multiple
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82 | formats, each denoted by a 36-byte format descriptor of
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83 | [ uint32 format + 32-byte description ].
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84 | */
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85 | void
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86 | cliprdr_send_native_format_announce(uint8 * formats_data, uint32 formats_data_length)
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87 | {
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88 | DEBUG_CLIPBOARD(("cliprdr_send_native_format_announce\n"));
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89 |
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90 | cliprdr_send_packet(CLIPRDR_FORMAT_ANNOUNCE, CLIPRDR_REQUEST, formats_data,
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91 | formats_data_length);
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92 |
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93 | if (formats_data != last_formats)
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94 | {
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95 | if (last_formats)
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96 | xfree(last_formats);
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97 |
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98 | last_formats = xmalloc(formats_data_length);
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99 | memcpy(last_formats, formats_data, formats_data_length);
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100 | last_formats_length = formats_data_length;
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101 | }
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102 | }
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103 |
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104 | void
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105 | cliprdr_send_data_request(uint32 format)
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106 | {
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107 | uint8 buffer[4];
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108 |
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109 | DEBUG_CLIPBOARD(("cliprdr_send_data_request\n"));
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110 | buf_out_uint32(buffer, format);
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111 | cliprdr_send_packet(CLIPRDR_DATA_REQUEST, CLIPRDR_REQUEST, buffer, sizeof(buffer));
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112 | }
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113 |
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114 | void
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115 | cliprdr_send_data(uint8 * data, uint32 length)
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116 | {
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117 | DEBUG_CLIPBOARD(("cliprdr_send_data\n"));
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118 | cliprdr_send_packet(CLIPRDR_DATA_RESPONSE, CLIPRDR_RESPONSE, data, length);
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119 | }
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120 |
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121 | static void
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122 | cliprdr_process(STREAM s)
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123 | {
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124 | uint16 type, status;
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125 | uint32 length, format;
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126 | uint8 *data;
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127 |
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128 | in_uint16_le(s, type);
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129 | in_uint16_le(s, status);
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130 | in_uint32_le(s, length);
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131 | data = s->p;
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132 |
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133 | DEBUG_CLIPBOARD(("CLIPRDR recv: type=%d, status=%d, length=%d\n", type, status, length));
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134 |
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135 | if (status == CLIPRDR_ERROR)
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136 | {
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137 | switch (type)
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138 | {
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139 | case CLIPRDR_FORMAT_ACK:
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140 | /* FIXME: We seem to get this when we send an announce while the server is
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141 | still processing a paste. Try sending another announce. */
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142 | cliprdr_send_native_format_announce(last_formats,
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143 | last_formats_length);
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144 | break;
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145 | case CLIPRDR_DATA_RESPONSE:
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146 | ui_clip_request_failed();
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147 | break;
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148 | default:
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149 | DEBUG_CLIPBOARD(("CLIPRDR error (type=%d)\n", type));
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150 | }
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151 |
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152 | return;
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153 | }
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154 |
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155 | switch (type)
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156 | {
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157 | case CLIPRDR_CONNECT:
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158 | ui_clip_sync();
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159 | break;
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160 | case CLIPRDR_FORMAT_ANNOUNCE:
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161 | ui_clip_format_announce(data, length);
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162 | cliprdr_send_packet(CLIPRDR_FORMAT_ACK, CLIPRDR_RESPONSE, NULL, 0);
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163 | return;
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164 | case CLIPRDR_FORMAT_ACK:
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165 | break;
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166 | case CLIPRDR_DATA_REQUEST:
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167 | in_uint32_le(s, format);
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168 | ui_clip_request_data(format);
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169 | break;
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170 | case CLIPRDR_DATA_RESPONSE:
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171 | ui_clip_handle_data(data, length);
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172 | break;
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173 | case 7: /* TODO: W2K3 SP1 sends this on connect with a value of 1 */
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174 | break;
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175 | default:
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176 | unimpl("CLIPRDR packet type %d\n", type);
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177 | }
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178 | }
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179 |
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180 | void
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181 | cliprdr_set_mode(const char *optarg)
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182 | {
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183 | ui_clip_set_mode(optarg);
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184 | }
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185 |
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186 | RD_BOOL
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187 | cliprdr_init(void)
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188 | {
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189 | cliprdr_channel =
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190 | channel_register("cliprdr",
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191 | CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP |
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192 | CHANNEL_OPTION_COMPRESS_RDP | CHANNEL_OPTION_SHOW_PROTOCOL,
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193 | cliprdr_process);
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194 | return (cliprdr_channel != NULL);
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195 | }
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