1 | /*
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2 | * Copyright (c) 2025 Jiri Svoboda
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3 | * Copyright (c) 2009 Martin Decky
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4 | * All rights reserved.
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5 | *
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6 | * Redistribution and use in source and binary forms, with or without
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7 | * modification, are permitted provided that the following conditions
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8 | * are met:
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9 | *
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10 | * - Redistributions of source code must retain the above copyright
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11 | * notice, this list of conditions and the following disclaimer.
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12 | * - Redistributions in binary form must reproduce the above copyright
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13 | * notice, this list of conditions and the following disclaimer in the
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14 | * documentation and/or other materials provided with the distribution.
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15 | * - The name of the author may not be used to endorse or promote products
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16 | * derived from this software without specific prior written permission.
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17 | *
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18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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28 | */
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29 |
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30 | #include <async.h>
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31 | #include <errno.h>
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32 | #include <str_error.h>
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33 | #include <fibril_synch.h>
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34 | #include <ipc/services.h>
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35 | #include <ipc/clipboard.h>
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36 | #include <loc.h>
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37 | #include <stdio.h>
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38 | #include <stdbool.h>
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39 | #include <stdlib.h>
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40 | #include <task.h>
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41 |
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42 | #define NAME "clipboard"
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43 |
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44 | static char *clip_data = NULL;
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45 | static size_t clip_size = 0;
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46 | static clipboard_tag_t clip_tag = CLIPBOARD_TAG_NONE;
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47 | static FIBRIL_MUTEX_INITIALIZE(clip_mtx);
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48 | static service_id_t svc_id;
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49 |
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50 | static void clip_put_data(ipc_call_t *req)
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51 | {
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52 | char *data;
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53 | errno_t rc;
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54 | size_t size;
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55 |
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56 | switch (ipc_get_arg1(req)) {
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57 | case CLIPBOARD_TAG_NONE:
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58 | fibril_mutex_lock(&clip_mtx);
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59 |
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60 | if (clip_data)
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61 | free(clip_data);
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62 |
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63 | clip_data = NULL;
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64 | clip_size = 0;
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65 | clip_tag = CLIPBOARD_TAG_NONE;
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66 |
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67 | fibril_mutex_unlock(&clip_mtx);
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68 | async_answer_0(req, EOK);
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69 | break;
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70 | case CLIPBOARD_TAG_DATA:
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71 | rc = async_data_write_accept((void **) &data, false, 0, 0, 0, &size);
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72 | if (rc != EOK) {
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73 | async_answer_0(req, rc);
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74 | break;
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75 | }
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76 |
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77 | fibril_mutex_lock(&clip_mtx);
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78 |
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79 | if (clip_data)
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80 | free(clip_data);
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81 |
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82 | clip_data = data;
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83 | clip_size = size;
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84 | clip_tag = CLIPBOARD_TAG_DATA;
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85 |
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86 | fibril_mutex_unlock(&clip_mtx);
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87 | async_answer_0(req, EOK);
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88 | break;
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89 | default:
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90 | async_answer_0(req, EINVAL);
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91 | }
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92 | }
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93 |
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94 | static void clip_get_data(ipc_call_t *req)
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95 | {
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96 | fibril_mutex_lock(&clip_mtx);
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97 |
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98 | ipc_call_t call;
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99 | size_t size;
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100 |
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101 | /* Check for clipboard data tag compatibility */
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102 | switch (ipc_get_arg1(req)) {
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103 | case CLIPBOARD_TAG_DATA:
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104 | if (!async_data_read_receive(&call, &size)) {
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105 | async_answer_0(&call, EINVAL);
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106 | async_answer_0(req, EINVAL);
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107 | break;
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108 | }
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109 |
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110 | if (clip_tag != CLIPBOARD_TAG_DATA) {
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111 | /* So far we only understand binary data */
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112 | async_answer_0(&call, EOVERFLOW);
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113 | async_answer_0(req, EOVERFLOW);
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114 | break;
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115 | }
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116 |
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117 | if (clip_size != size) {
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118 | /* The client expects different size of data */
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119 | async_answer_0(&call, EOVERFLOW);
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120 | async_answer_0(req, EOVERFLOW);
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121 | break;
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122 | }
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123 |
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124 | errno_t retval = async_data_read_finalize(&call, clip_data, size);
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125 | if (retval != EOK) {
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126 | async_answer_0(req, retval);
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127 | break;
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128 | }
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129 |
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130 | async_answer_0(req, EOK);
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131 | break;
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132 | default:
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133 | /*
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134 | * Sorry, we don't know how to get unknown or NONE
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135 | * data from the clipbard
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136 | */
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137 | async_answer_0(req, EINVAL);
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138 | break;
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139 | }
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140 |
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141 | fibril_mutex_unlock(&clip_mtx);
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142 | }
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143 |
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144 | static void clip_content(ipc_call_t *req)
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145 | {
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146 | fibril_mutex_lock(&clip_mtx);
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147 |
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148 | size_t size = clip_size;
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149 | clipboard_tag_t tag = clip_tag;
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150 |
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151 | fibril_mutex_unlock(&clip_mtx);
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152 | async_answer_2(req, EOK, (sysarg_t) size, (sysarg_t) tag);
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153 | }
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154 |
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155 | static void clip_connection(ipc_call_t *icall, void *arg)
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156 | {
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157 | /* Accept connection */
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158 | async_accept_0(icall);
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159 |
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160 | while (true) {
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161 | ipc_call_t call;
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162 | async_get_call(&call);
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163 |
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164 | if (!ipc_get_imethod(&call)) {
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165 | async_answer_0(&call, EOK);
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166 | break;
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167 | }
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168 |
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169 | switch (ipc_get_imethod(&call)) {
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170 | case CLIPBOARD_PUT_DATA:
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171 | clip_put_data(&call);
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172 | break;
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173 | case CLIPBOARD_GET_DATA:
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174 | clip_get_data(&call);
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175 | break;
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176 | case CLIPBOARD_CONTENT:
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177 | clip_content(&call);
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178 | break;
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179 | default:
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180 | async_answer_0(&call, ENOENT);
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181 | }
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182 | }
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183 | }
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184 |
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185 | int main(int argc, char *argv[])
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186 | {
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187 | errno_t rc;
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188 | loc_srv_t *srv;
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189 |
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190 | printf("%s: HelenOS clipboard service\n", NAME);
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191 | async_set_fallback_port_handler(clip_connection, NULL);
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192 |
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193 | rc = loc_server_register(NAME, &srv);
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194 | if (rc != EOK) {
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195 | printf("%s: Failed registering server: %s\n", NAME, str_error(rc));
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196 | return rc;
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197 | }
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198 |
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199 | rc = loc_service_register(srv, SERVICE_NAME_CLIPBOARD,
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200 | fallback_port_id, &svc_id);
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201 | if (rc != EOK) {
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202 | loc_server_unregister(srv);
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203 |
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204 | printf("%s: Failed registering service : %s\n", NAME, str_error(rc));
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205 | return rc;
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206 | }
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207 |
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208 | printf("%s: Accepting connections\n", NAME);
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209 | task_retval(0);
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210 | async_manager();
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211 |
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212 | /* Never reached */
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213 | return 0;
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214 | }
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