| 1 | /************************************************************ |
| 2 | |
| 3 | Author: Eamon Walsh <ewalsh@tycho.nsa.gov> |
| 4 | |
| 5 | Permission to use, copy, modify, distribute, and sell this software and its |
| 6 | documentation for any purpose is hereby granted without fee, provided that |
| 7 | this permission notice appear in supporting documentation. This permission |
| 8 | notice shall be included in all copies or substantial portions of the |
| 9 | Software. |
| 10 | |
| 11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 12 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 14 | AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
| 15 | AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 16 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 17 | |
| 18 | ********************************************************/ |
| 19 | |
| 20 | #ifdef HAVE_DIX_CONFIG_H |
| 21 | #include <dix-config.h> |
| 22 | #endif |
| 23 | |
| 24 | #ifdef XREGISTRY |
| 25 | |
| 26 | #include <stdlib.h> |
| 27 | #include <string.h> |
| 28 | #include <X11/X.h> |
| 29 | #include <X11/Xproto.h> |
| 30 | #include "resource.h" |
| 31 | #include "registry.h" |
| 32 | |
| 33 | #define BASE_SIZE 16 |
| 34 | #define CORE "X11" |
| 35 | #define FILENAME SERVER_MISC_CONFIG_PATH "/protocol.txt" |
| 36 | |
| 37 | #define PROT_COMMENT '#' |
| 38 | #define PROT_REQUEST 'R' |
| 39 | #define PROT_EVENT 'V' |
| 40 | #define PROT_ERROR 'E' |
| 41 | |
| 42 | static FILE *fh; |
| 43 | |
| 44 | static char ***requests, **events, **errors; |
| 45 | static const char **resources; |
| 46 | static unsigned nmajor, *nminor, nevent, nerror, nresource; |
| 47 | |
| 48 | /* |
| 49 | * File parsing routines |
| 50 | */ |
| 51 | static int |
| 52 | double_size(void *p, unsigned n, unsigned size) |
| 53 | { |
| 54 | char **ptr = (char **) p; |
| 55 | unsigned s, f; |
| 56 | |
| 57 | if (n) { |
| 58 | s = n * size; |
| 59 | n *= 2 * size; |
| 60 | f = n; |
| 61 | } |
| 62 | else { |
| 63 | s = 0; |
| 64 | n = f = BASE_SIZE * size; |
| 65 | } |
| 66 | |
| 67 | *ptr = realloc(*ptr, n); |
| 68 | if (!*ptr) { |
| 69 | dixResetRegistry(); |
| 70 | return FALSE; |
| 71 | } |
| 72 | memset(*ptr + s, 0, f - s); |
| 73 | return TRUE; |
| 74 | } |
| 75 | |
| 76 | static void |
| 77 | RegisterRequestName(unsigned major, unsigned minor, char *name) |
| 78 | { |
| 79 | while (major >= nmajor) { |
| 80 | if (!double_size(&requests, nmajor, sizeof(char **))) |
| 81 | return; |
| 82 | if (!double_size(&nminor, nmajor, sizeof(unsigned))) |
| 83 | return; |
| 84 | nmajor = nmajor ? nmajor * 2 : BASE_SIZE; |
| 85 | } |
| 86 | while (minor >= nminor[major]) { |
| 87 | if (!double_size(requests + major, nminor[major], sizeof(char *))) |
| 88 | return; |
| 89 | nminor[major] = nminor[major] ? nminor[major] * 2 : BASE_SIZE; |
| 90 | } |
| 91 | |
| 92 | free(requests[major][minor]); |
| 93 | requests[major][minor] = name; |
| 94 | } |
| 95 | |
| 96 | static void |
| 97 | RegisterEventName(unsigned event, char *name) |
| 98 | { |
| 99 | while (event >= nevent) { |
| 100 | if (!double_size(&events, nevent, sizeof(char *))) |
| 101 | return; |
| 102 | nevent = nevent ? nevent * 2 : BASE_SIZE; |
| 103 | } |
| 104 | |
| 105 | free(events[event]); |
| 106 | events[event] = name; |
| 107 | } |
| 108 | |
| 109 | static void |
| 110 | RegisterErrorName(unsigned error, char *name) |
| 111 | { |
| 112 | while (error >= nerror) { |
| 113 | if (!double_size(&errors, nerror, sizeof(char *))) |
| 114 | return; |
| 115 | nerror = nerror ? nerror * 2 : BASE_SIZE; |
| 116 | } |
| 117 | |
| 118 | free(errors[error]); |
| 119 | errors[error] = name; |
| 120 | } |
| 121 | |
| 122 | void |
| 123 | RegisterExtensionNames(ExtensionEntry * extEntry) |
| 124 | { |
| 125 | char buf[256], *lineobj, *ptr; |
| 126 | unsigned offset; |
| 127 | |
| 128 | if (fh == NULL) |
| 129 | return; |
| 130 | |
| 131 | rewind(fh); |
| 132 | |
| 133 | while (fgets(buf, sizeof(buf), fh)) { |
| 134 | lineobj = NULL; |
| 135 | ptr = strchr(buf, '\n'); |
| 136 | if (ptr) |
| 137 | *ptr = 0; |
| 138 | |
| 139 | /* Check for comments or empty lines */ |
| 140 | switch (buf[0]) { |
| 141 | case PROT_REQUEST: |
| 142 | case PROT_EVENT: |
| 143 | case PROT_ERROR: |
| 144 | break; |
| 145 | case PROT_COMMENT: |
| 146 | case '\0': |
| 147 | continue; |
| 148 | default: |
| 149 | goto invalid; |
| 150 | } |
| 151 | |
| 152 | /* Check for space character in the fifth position */ |
| 153 | ptr = strchr(buf, ' '); |
| 154 | if (!ptr || ptr != buf + 4) |
| 155 | goto invalid; |
| 156 | |
| 157 | /* Duplicate the string after the space */ |
| 158 | lineobj = strdup(ptr + 1); |
| 159 | if (!lineobj) |
| 160 | continue; |
| 161 | |
| 162 | /* Check for a colon somewhere on the line */ |
| 163 | ptr = strchr(buf, ':'); |
| 164 | if (!ptr) |
| 165 | goto invalid; |
| 166 | |
| 167 | /* Compare the part before colon with the target extension name */ |
| 168 | *ptr = 0; |
| 169 | if (strcmp(buf + 5, extEntry->name)) |
| 170 | goto skip; |
| 171 | |
| 172 | /* Get the opcode for the request, event, or error */ |
| 173 | offset = strtol(buf + 1, &ptr, 10); |
| 174 | if (offset == 0 && ptr == buf + 1) |
| 175 | goto invalid; |
| 176 | |
| 177 | /* Save the strdup result in the registry */ |
| 178 | switch (buf[0]) { |
| 179 | case PROT_REQUEST: |
| 180 | if (extEntry->base) |
| 181 | RegisterRequestName(extEntry->base, offset, lineobj); |
| 182 | else |
| 183 | RegisterRequestName(offset, 0, lineobj); |
| 184 | continue; |
| 185 | case PROT_EVENT: |
| 186 | RegisterEventName(extEntry->eventBase + offset, lineobj); |
| 187 | continue; |
| 188 | case PROT_ERROR: |
| 189 | RegisterErrorName(extEntry->errorBase + offset, lineobj); |
| 190 | continue; |
| 191 | } |
| 192 | |
| 193 | invalid: |
| 194 | LogMessage(X_WARNING, "Invalid line in " FILENAME ", skipping\n"); |
| 195 | skip: |
| 196 | free(lineobj); |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | /* |
| 201 | * Registration functions |
| 202 | */ |
| 203 | |
| 204 | void |
| 205 | RegisterResourceName(RESTYPE resource, const char *name) |
| 206 | { |
| 207 | resource &= TypeMask; |
| 208 | |
| 209 | while (resource >= nresource) { |
| 210 | if (!double_size(&resources, nresource, sizeof(char *))) |
| 211 | return; |
| 212 | nresource = nresource ? nresource * 2 : BASE_SIZE; |
| 213 | } |
| 214 | |
| 215 | resources[resource] = name; |
| 216 | } |
| 217 | |
| 218 | /* |
| 219 | * Lookup functions |
| 220 | */ |
| 221 | |
| 222 | const char * |
| 223 | LookupRequestName(int major, int minor) |
| 224 | { |
| 225 | if (major >= nmajor) |
| 226 | return XREGISTRY_UNKNOWN; |
| 227 | if (minor >= nminor[major]) |
| 228 | return XREGISTRY_UNKNOWN; |
| 229 | |
| 230 | return requests[major][minor] ? requests[major][minor] : XREGISTRY_UNKNOWN; |
| 231 | } |
| 232 | |
| 233 | const char * |
| 234 | LookupMajorName(int major) |
| 235 | { |
| 236 | if (major < 128) { |
| 237 | const char *retval; |
| 238 | |
| 239 | if (major >= nmajor) |
| 240 | return XREGISTRY_UNKNOWN; |
| 241 | if (0 >= nminor[major]) |
| 242 | return XREGISTRY_UNKNOWN; |
| 243 | |
| 244 | retval = requests[major][0]; |
| 245 | return retval ? retval + sizeof(CORE) : XREGISTRY_UNKNOWN; |
| 246 | } |
| 247 | else { |
| 248 | ExtensionEntry *extEntry = GetExtensionEntry(major); |
| 249 | |
| 250 | return extEntry ? extEntry->name : XREGISTRY_UNKNOWN; |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | const char * |
| 255 | LookupEventName(int event) |
| 256 | { |
| 257 | event &= 127; |
| 258 | if (event >= nevent) |
| 259 | return XREGISTRY_UNKNOWN; |
| 260 | |
| 261 | return events[event] ? events[event] : XREGISTRY_UNKNOWN; |
| 262 | } |
| 263 | |
| 264 | const char * |
| 265 | LookupErrorName(int error) |
| 266 | { |
| 267 | if (error >= nerror) |
| 268 | return XREGISTRY_UNKNOWN; |
| 269 | |
| 270 | return errors[error] ? errors[error] : XREGISTRY_UNKNOWN; |
| 271 | } |
| 272 | |
| 273 | const char * |
| 274 | LookupResourceName(RESTYPE resource) |
| 275 | { |
| 276 | resource &= TypeMask; |
| 277 | if (resource >= nresource) |
| 278 | return XREGISTRY_UNKNOWN; |
| 279 | |
| 280 | return resources[resource] ? resources[resource] : XREGISTRY_UNKNOWN; |
| 281 | } |
| 282 | |
| 283 | void |
| 284 | dixFreeRegistry(void) |
| 285 | { |
| 286 | /* Free all memory */ |
| 287 | while (nmajor--) { |
| 288 | while (nminor[nmajor]) |
| 289 | free(requests[nmajor][--nminor[nmajor]]); |
| 290 | free(requests[nmajor]); |
| 291 | } |
| 292 | free(requests); |
| 293 | free(nminor); |
| 294 | |
| 295 | while (nevent--) |
| 296 | free(events[nevent]); |
| 297 | free(events); |
| 298 | |
| 299 | while (nerror--) |
| 300 | free(errors[nerror]); |
| 301 | free(errors); |
| 302 | |
| 303 | free(resources); |
| 304 | |
| 305 | requests = NULL; |
| 306 | nminor = NULL; |
| 307 | events = NULL; |
| 308 | errors = NULL; |
| 309 | resources = NULL; |
| 310 | |
| 311 | nmajor = nevent = nerror = nresource = 0; |
| 312 | |
| 313 | if (fh) { |
| 314 | fclose(fh); |
| 315 | fh = NULL; |
| 316 | } |
| 317 | } |
| 318 | |
| 319 | /* |
| 320 | * Setup and teardown |
| 321 | */ |
| 322 | void |
| 323 | dixResetRegistry(void) |
| 324 | { |
| 325 | ExtensionEntry extEntry = { .name = CORE }; |
| 326 | |
| 327 | dixFreeRegistry(); |
| 328 | |
| 329 | /* Open the protocol file */ |
| 330 | fh = fopen(FILENAME, "r"); |
| 331 | if (!fh) |
| 332 | LogMessage(X_WARNING, |
| 333 | "Failed to open protocol names file " FILENAME "\n"); |
| 334 | |
| 335 | /* Add built-in resources */ |
| 336 | RegisterResourceName(RT_NONE, "NONE"); |
| 337 | RegisterResourceName(RT_WINDOW, "WINDOW"); |
| 338 | RegisterResourceName(RT_PIXMAP, "PIXMAP"); |
| 339 | RegisterResourceName(RT_GC, "GC"); |
| 340 | RegisterResourceName(RT_FONT, "FONT"); |
| 341 | RegisterResourceName(RT_CURSOR, "CURSOR"); |
| 342 | RegisterResourceName(RT_COLORMAP, "COLORMAP"); |
| 343 | RegisterResourceName(RT_CMAPENTRY, "COLORMAP ENTRY"); |
| 344 | RegisterResourceName(RT_OTHERCLIENT, "OTHER CLIENT"); |
| 345 | RegisterResourceName(RT_PASSIVEGRAB, "PASSIVE GRAB"); |
| 346 | |
| 347 | /* Add the core protocol */ |
| 348 | RegisterExtensionNames(&extEntry); |
| 349 | } |
| 350 | |
| 351 | #endif /* XREGISTRY */ |