Miroslav Zagorac | 70230c6 | 2020-12-09 16:54:31 +0100 | [diff] [blame] | 1 | /*** |
| 2 | * Copyright 2020 HAProxy Technologies |
| 3 | * |
| 4 | * This file is part of the HAProxy OpenTracing filter. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version 2 |
| 9 | * of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 19 | */ |
| 20 | #include "include.h" |
| 21 | |
| 22 | |
| 23 | /* |
| 24 | * OpenTracing filter id, used to identify OpenTracing filters. |
| 25 | * The name of this variable is consistent with the other filter names |
| 26 | * declared in include/haproxy/filters.h . |
| 27 | */ |
| 28 | const char *ot_flt_id = "the OpenTracing filter"; |
| 29 | |
| 30 | |
| 31 | /*** |
| 32 | * NAME |
| 33 | * flt_ot_is_disabled - |
| 34 | * |
| 35 | * ARGUMENTS |
| 36 | * f - |
| 37 | * event - |
| 38 | * |
| 39 | * DESCRIPTION |
| 40 | * - |
| 41 | * |
| 42 | * RETURN VALUE |
| 43 | * - |
| 44 | */ |
| 45 | bool flt_ot_is_disabled(const struct filter *f FLT_OT_DBG_ARGS(, int event)) |
| 46 | { |
| 47 | #ifdef DEBUG_OT |
| 48 | const struct flt_ot_conf *conf = FLT_OT_CONF(f); |
| 49 | const char *msg; |
| 50 | #endif |
| 51 | bool retval; |
| 52 | |
| 53 | retval = FLT_OT_RT_CTX(f->ctx)->flag_disabled ? 1 : 0; |
| 54 | |
| 55 | #ifdef DEBUG_OT |
| 56 | msg = retval ? " (disabled)" : ""; |
| 57 | |
| 58 | if (FLT_OT_IN_RANGE(event, 0, FLT_OT_EVENT_MAX - 1)) |
| 59 | FLT_OT_DBG(2, "filter '%s', type: %s, event: '%s' %d%s", conf->id, flt_ot_type(f), flt_ot_event_data[event].name, event, msg); |
| 60 | else |
| 61 | FLT_OT_DBG(2, "filter '%s', type: %s%s", conf->id, flt_ot_type(f), msg); |
| 62 | #endif |
| 63 | |
| 64 | return retval; |
| 65 | } |
| 66 | |
| 67 | |
| 68 | /*** |
| 69 | * NAME |
| 70 | * flt_ot_return_int - |
| 71 | * |
| 72 | * ARGUMENTS |
| 73 | * f - |
| 74 | * err - |
| 75 | * retval - |
| 76 | * |
| 77 | * DESCRIPTION |
| 78 | * - |
| 79 | * |
| 80 | * RETURN VALUE |
| 81 | * - |
| 82 | */ |
| 83 | static int flt_ot_return_int(const struct filter *f, char **err, int retval) |
| 84 | { |
| 85 | struct flt_ot_runtime_context *rt_ctx = f->ctx; |
| 86 | |
| 87 | if ((retval == FLT_OT_RET_ERROR) || ((err != NULL) && (*err != NULL))) { |
| 88 | if (rt_ctx->flag_harderr) { |
| 89 | FLT_OT_DBG(1, "WARNING: filter hard-error (disabled)"); |
| 90 | |
| 91 | rt_ctx->flag_disabled = 1; |
| 92 | |
| 93 | _HA_ATOMIC_ADD(FLT_OT_CONF(f)->cnt.disabled + 1, 1); |
| 94 | } else { |
| 95 | FLT_OT_DBG(1, "WARNING: filter soft-error"); |
| 96 | } |
| 97 | |
| 98 | retval = FLT_OT_RET_OK; |
| 99 | } |
| 100 | |
| 101 | FLT_OT_ERR_FREE(*err); |
| 102 | |
| 103 | return retval; |
| 104 | } |
| 105 | |
| 106 | |
| 107 | /*** |
| 108 | * NAME |
| 109 | * flt_ot_return_void - |
| 110 | * |
| 111 | * ARGUMENTS |
| 112 | * f - |
| 113 | * err - |
| 114 | * |
| 115 | * DESCRIPTION |
| 116 | * - |
| 117 | * |
| 118 | * RETURN VALUE |
| 119 | * This function does not return a value. |
| 120 | */ |
| 121 | static void flt_ot_return_void(const struct filter *f, char **err) |
| 122 | { |
| 123 | struct flt_ot_runtime_context *rt_ctx = f->ctx; |
| 124 | |
| 125 | if ((err != NULL) && (*err != NULL)) { |
| 126 | if (rt_ctx->flag_harderr) { |
| 127 | FLT_OT_DBG(1, "WARNING: filter hard-error (disabled)"); |
| 128 | |
| 129 | rt_ctx->flag_disabled = 1; |
| 130 | |
| 131 | _HA_ATOMIC_ADD(FLT_OT_CONF(f)->cnt.disabled + 1, 1); |
| 132 | } else { |
| 133 | FLT_OT_DBG(1, "WARNING: filter soft-error"); |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | FLT_OT_ERR_FREE(*err); |
| 138 | } |
| 139 | |
| 140 | |
| 141 | /*** |
| 142 | * NAME |
| 143 | * flt_ot_init - Initialize the filter. |
| 144 | * |
| 145 | * ARGUMENTS |
| 146 | * p - |
| 147 | * fconf - |
| 148 | * |
| 149 | * DESCRIPTION |
| 150 | * It initializes the filter for a proxy. You may define this callback |
| 151 | * if you need to complete your filter configuration. |
| 152 | * |
| 153 | * RETURN VALUE |
| 154 | * Returns a negative value if an error occurs, any other value otherwise. |
| 155 | */ |
| 156 | static int flt_ot_init(struct proxy *p, struct flt_conf *fconf) |
| 157 | { |
| 158 | struct flt_ot_conf *conf = FLT_OT_DEREF(fconf, conf, NULL); |
Miroslav Zagorac | f226343 | 2021-04-02 04:25:47 +0200 | [diff] [blame^] | 159 | int retval = FLT_OT_RET_OK; |
Miroslav Zagorac | 70230c6 | 2020-12-09 16:54:31 +0100 | [diff] [blame] | 160 | |
| 161 | FLT_OT_FUNC("%p, %p", p, fconf); |
| 162 | |
| 163 | if (conf == NULL) |
Miroslav Zagorac | f226343 | 2021-04-02 04:25:47 +0200 | [diff] [blame^] | 164 | FLT_OT_RETURN(FLT_OT_RET_ERROR); |
Miroslav Zagorac | 70230c6 | 2020-12-09 16:54:31 +0100 | [diff] [blame] | 165 | |
| 166 | flt_ot_cli_init(); |
| 167 | |
Miroslav Zagorac | 70230c6 | 2020-12-09 16:54:31 +0100 | [diff] [blame] | 168 | FLT_OT_RETURN(retval); |
| 169 | } |
| 170 | |
| 171 | |
| 172 | /*** |
| 173 | * NAME |
| 174 | * flt_ot_deinit - Free resources allocated by the filter. |
| 175 | * |
| 176 | * ARGUMENTS |
| 177 | * p - |
| 178 | * fconf - |
| 179 | * |
| 180 | * DESCRIPTION |
| 181 | * It cleans up what the parsing function and the init callback have done. |
| 182 | * This callback is useful to release memory allocated for the filter |
| 183 | * configuration. |
| 184 | * |
| 185 | * RETURN VALUE |
| 186 | * This function does not return a value. |
| 187 | */ |
| 188 | static void flt_ot_deinit(struct proxy *p, struct flt_conf *fconf) |
| 189 | { |
| 190 | struct flt_ot_conf **conf = (fconf == NULL) ? NULL : (typeof(conf))&(fconf->conf); |
| 191 | #ifdef DEBUG_OT |
| 192 | int i; |
| 193 | #endif |
| 194 | |
| 195 | FLT_OT_FUNC("%p, %p", p, fconf); |
| 196 | |
| 197 | if (conf == NULL) |
| 198 | FLT_OT_RETURN(); |
| 199 | |
| 200 | ot_debug(); |
| 201 | ot_close(&((*conf)->tracer->tracer)); |
| 202 | |
| 203 | #ifdef DEBUG_OT |
| 204 | FLT_OT_DBG(0, "--- used events ----------"); |
| 205 | for (i = 0; i < FLT_OT_TABLESIZE((*conf)->cnt.event); i++) |
| 206 | if ((*conf)->cnt.event[i].flag_used) |
| 207 | FLT_OT_DBG(0, " %02d: %" PRIu64 " / %" PRIu64, i, (*conf)->cnt.event[i].htx[0], (*conf)->cnt.event[i].htx[1]); |
| 208 | #endif |
| 209 | |
| 210 | flt_ot_conf_free(conf); |
| 211 | |
| 212 | FLT_OT_MEMINFO(); |
| 213 | |
| 214 | FLT_OT_RETURN(); |
| 215 | } |
| 216 | |
| 217 | |
| 218 | /*** |
| 219 | * NAME |
| 220 | * flt_ot_check - Check configuration of the filter for the specified proxy. |
| 221 | * |
| 222 | * ARGUMENTS |
| 223 | * p - |
| 224 | * fconf - |
| 225 | * |
| 226 | * DESCRIPTION |
| 227 | * Optionally, by implementing the flt_ot_check() callback, you add a |
| 228 | * step to check the internal configuration of your filter after the |
| 229 | * parsing phase, when the HAProxy configuration is fully defined. |
| 230 | * |
| 231 | * RETURN VALUE |
| 232 | * Returns the number of encountered errors. |
| 233 | */ |
| 234 | static int flt_ot_check(struct proxy *p, struct flt_conf *fconf) |
| 235 | { |
| 236 | struct proxy *px; |
| 237 | struct flt_ot_conf *conf = FLT_OT_DEREF(fconf, conf, NULL); |
| 238 | struct flt_ot_conf_group *conf_group; |
| 239 | struct flt_ot_conf_scope *conf_scope; |
| 240 | struct flt_ot_conf_ph *ph_group, *ph_scope; |
| 241 | int retval = 0, scope_unused_cnt = 0, span_root_cnt = 0; |
| 242 | |
| 243 | FLT_OT_FUNC("%p, %p", p, fconf); |
| 244 | |
| 245 | if (conf == NULL) |
| 246 | FLT_OT_RETURN(++retval); |
| 247 | |
| 248 | /* |
| 249 | * If only the proxy specified with the <p> parameter is checked, then |
| 250 | * no duplicate filters can be found that are not defined in the same |
| 251 | * configuration sections. |
| 252 | */ |
| 253 | for (px = proxies_list; px != NULL; px = px->next) { |
| 254 | struct flt_conf *fconf_tmp; |
| 255 | |
| 256 | FLT_OT_DBG(2, "proxy '%s'", px->id); |
| 257 | |
| 258 | /* |
| 259 | * The names of all OT filters (filter ID) should be checked, |
| 260 | * they must be unique. |
| 261 | */ |
| 262 | list_for_each_entry(fconf_tmp, &(px->filter_configs), list) |
| 263 | if ((fconf_tmp != fconf) && (fconf_tmp->id == ot_flt_id)) { |
| 264 | struct flt_ot_conf *conf_tmp = fconf_tmp->conf; |
| 265 | |
| 266 | FLT_OT_DBG(2, " OT filter '%s'", conf_tmp->id); |
| 267 | |
| 268 | if (strcmp(conf_tmp->id, conf->id) == 0) { |
| 269 | FLT_OT_ALERT("''%s' : duplicated filter ID'", conf_tmp->id); |
| 270 | |
| 271 | retval++; |
| 272 | } |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | if (FLT_OT_DEREF(conf->tracer, id, NULL) == NULL) { |
| 277 | FLT_OT_ALERT("''%s' : no tracer found'", conf->id); |
| 278 | |
| 279 | retval++; |
| 280 | } |
| 281 | |
| 282 | /* |
| 283 | * Checking that all defined 'ot-group' sections have correctly declared |
| 284 | * 'ot-scope' sections (ie whether the declared 'ot-scope' sections have |
| 285 | * corresponding definitions). |
| 286 | */ |
| 287 | list_for_each_entry(conf_group, &(conf->groups), list) |
| 288 | list_for_each_entry(ph_scope, &(conf_group->ph_scopes), list) { |
| 289 | bool flag_found = 0; |
| 290 | |
| 291 | list_for_each_entry(conf_scope, &(conf->scopes), list) |
| 292 | if (strcmp(ph_scope->id, conf_scope->id) == 0) { |
| 293 | ph_scope->ptr = conf_scope; |
| 294 | conf_scope->flag_used = 1; |
| 295 | flag_found = 1; |
| 296 | |
| 297 | break; |
| 298 | } |
| 299 | |
| 300 | if (!flag_found) { |
| 301 | FLT_OT_ALERT("'" FLT_OT_PARSE_SECTION_GROUP_ID " '%s' : try to use undefined " FLT_OT_PARSE_SECTION_SCOPE_ID " '%s''", conf_group->id, ph_scope->id); |
| 302 | |
| 303 | retval++; |
| 304 | } |
| 305 | } |
| 306 | |
| 307 | if (conf->tracer != NULL) { |
| 308 | /* |
| 309 | * Checking that all declared 'groups' keywords have correctly |
| 310 | * defined 'ot-group' sections. |
| 311 | */ |
| 312 | list_for_each_entry(ph_group, &(conf->tracer->ph_groups), list) { |
| 313 | bool flag_found = 0; |
| 314 | |
| 315 | list_for_each_entry(conf_group, &(conf->groups), list) |
| 316 | if (strcmp(ph_group->id, conf_group->id) == 0) { |
| 317 | ph_group->ptr = conf_group; |
| 318 | conf_group->flag_used = 1; |
| 319 | flag_found = 1; |
| 320 | |
| 321 | break; |
| 322 | } |
| 323 | |
| 324 | if (!flag_found) { |
| 325 | FLT_OT_ALERT("'" FLT_OT_PARSE_SECTION_TRACER_ID " '%s' : try to use undefined " FLT_OT_PARSE_SECTION_GROUP_ID " '%s''", conf->tracer->id, ph_group->id); |
| 326 | |
| 327 | retval++; |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | /* |
| 332 | * Checking that all declared 'scopes' keywords have correctly |
| 333 | * defined 'ot-scope' sections. |
| 334 | */ |
| 335 | list_for_each_entry(ph_scope, &(conf->tracer->ph_scopes), list) { |
| 336 | bool flag_found = 0; |
| 337 | |
| 338 | list_for_each_entry(conf_scope, &(conf->scopes), list) |
| 339 | if (strcmp(ph_scope->id, conf_scope->id) == 0) { |
| 340 | ph_scope->ptr = conf_scope; |
| 341 | conf_scope->flag_used = 1; |
| 342 | flag_found = 1; |
| 343 | |
| 344 | break; |
| 345 | } |
| 346 | |
| 347 | if (!flag_found) { |
| 348 | FLT_OT_ALERT("'" FLT_OT_PARSE_SECTION_TRACER_ID " '%s' : try to use undefined " FLT_OT_PARSE_SECTION_SCOPE_ID " '%s''", conf->tracer->id, ph_scope->id); |
| 349 | |
| 350 | retval++; |
| 351 | } |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | FLT_OT_DBG(3, "--- filter '%s' configuration ----------", conf->id); |
| 356 | FLT_OT_DBG(3, "- defined spans ----------"); |
| 357 | |
| 358 | list_for_each_entry(conf_scope, &(conf->scopes), list) { |
| 359 | if (conf_scope->flag_used) { |
| 360 | struct flt_ot_conf_span *conf_span; |
| 361 | |
| 362 | /* |
| 363 | * In principle, only one span should be labeled |
| 364 | * as a root span. |
| 365 | */ |
| 366 | list_for_each_entry(conf_span, &(conf_scope->spans), list) { |
| 367 | FLT_OT_DBG_CONF_SPAN(" ", conf_span); |
| 368 | |
| 369 | span_root_cnt += conf_span->flag_root ? 1 : 0; |
| 370 | } |
| 371 | |
| 372 | #ifdef DEBUG_OT |
| 373 | conf->cnt.event[conf_scope->event].flag_used = 1; |
| 374 | #endif |
| 375 | |
| 376 | /* Set the flags of the analyzers used. */ |
| 377 | conf->tracer->analyzers |= flt_ot_event_data[conf_scope->event].an_bit; |
| 378 | } else { |
| 379 | FLT_OT_ALERT("''%s' : unused " FLT_OT_PARSE_SECTION_SCOPE_ID " '%s''", conf->id, conf_scope->id); |
| 380 | |
| 381 | scope_unused_cnt++; |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | /* |
| 386 | * Unused scopes or a number of root spans other than one do not |
| 387 | * necessarily have to be errors, but it is good to print it when |
| 388 | * starting HAProxy. |
| 389 | */ |
| 390 | if (scope_unused_cnt > 0) |
| 391 | FLT_OT_ALERT("''%s' : %d scope(s) not in use'", conf->id, scope_unused_cnt); |
| 392 | |
| 393 | if (LIST_ISEMPTY(&(conf->scopes))) |
| 394 | /* Do nothing. */; |
| 395 | else if (span_root_cnt == 0) |
| 396 | FLT_OT_ALERT("''%s' : no span is marked as the root span'", conf->id); |
| 397 | else if (span_root_cnt > 1) |
| 398 | FLT_OT_ALERT("''%s' : multiple spans are marked as the root span'", conf->id); |
| 399 | |
| 400 | FLT_OT_DBG_LIST(conf, group, "", "defined", _group, |
| 401 | FLT_OT_DBG_CONF_GROUP(" ", _group); |
| 402 | FLT_OT_DBG_LIST(_group, ph_scope, " ", "used", _scope, FLT_OT_DBG_CONF_PH(" ", _scope))); |
| 403 | FLT_OT_DBG_LIST(conf, scope, "", "defined", _scope, FLT_OT_DBG_CONF_SCOPE(" ", _scope)); |
| 404 | |
| 405 | if (conf->tracer != NULL) { |
| 406 | FLT_OT_DBG(3, " --- tracer '%s' configuration ----------", conf->tracer->id); |
| 407 | FLT_OT_DBG_LIST(conf->tracer, ph_group, " ", "used", _group, FLT_OT_DBG_CONF_PH(" ", _group)); |
| 408 | FLT_OT_DBG_LIST(conf->tracer, ph_scope, " ", "used", _scope, FLT_OT_DBG_CONF_PH(" ", _scope)); |
| 409 | } |
| 410 | |
| 411 | FLT_OT_RETURN(retval); |
| 412 | } |
| 413 | |
| 414 | |
Miroslav Zagorac | 70230c6 | 2020-12-09 16:54:31 +0100 | [diff] [blame] | 415 | /*** |
| 416 | * NAME |
| 417 | * flt_ot_init_per_thread - |
| 418 | * |
| 419 | * ARGUMENTS |
| 420 | * p - |
| 421 | * fconf - |
| 422 | * |
| 423 | * DESCRIPTION |
| 424 | * It initializes the filter for each thread. It works the same way than |
| 425 | * flt_ot_init() but in the context of a thread. This callback is called |
| 426 | * after the thread creation. |
| 427 | * |
| 428 | * RETURN VALUE |
| 429 | * Returns a negative value if an error occurs, any other value otherwise. |
| 430 | */ |
| 431 | static int flt_ot_init_per_thread(struct proxy *p, struct flt_conf *fconf) |
| 432 | { |
Miroslav Zagorac | f226343 | 2021-04-02 04:25:47 +0200 | [diff] [blame^] | 433 | struct flt_ot_conf *conf = FLT_OT_DEREF(fconf, conf, NULL); |
| 434 | char *err = NULL; |
| 435 | int retval = FLT_OT_RET_ERROR; |
Miroslav Zagorac | 70230c6 | 2020-12-09 16:54:31 +0100 | [diff] [blame] | 436 | |
| 437 | FLT_OT_FUNC("%p, %p", p, fconf); |
| 438 | |
Miroslav Zagorac | f226343 | 2021-04-02 04:25:47 +0200 | [diff] [blame^] | 439 | if (conf == NULL) |
| 440 | FLT_OT_RETURN(retval); |
| 441 | |
| 442 | /* |
| 443 | * Initialize the OpenTracing library. |
| 444 | * Enable HTX streams filtering. |
| 445 | */ |
| 446 | if (conf->tracer->tracer == NULL) { |
| 447 | retval = ot_init(&(conf->tracer->tracer), conf->tracer->config, conf->tracer->plugin, &err); |
| 448 | if (retval != FLT_OT_RET_ERROR) |
| 449 | fconf->flags |= FLT_CFG_FL_HTX; |
| 450 | else if (err != NULL) { |
| 451 | FLT_OT_ALERT("%s", err); |
| 452 | |
| 453 | FLT_OT_ERR_FREE(err); |
| 454 | } |
| 455 | } else { |
| 456 | retval = FLT_OT_RET_OK; |
| 457 | } |
| 458 | |
Miroslav Zagorac | 70230c6 | 2020-12-09 16:54:31 +0100 | [diff] [blame] | 459 | FLT_OT_RETURN(retval); |
| 460 | } |
| 461 | |
| 462 | |
Miroslav Zagorac | f226343 | 2021-04-02 04:25:47 +0200 | [diff] [blame^] | 463 | #ifdef DEBUG_OT |
| 464 | |
Miroslav Zagorac | 70230c6 | 2020-12-09 16:54:31 +0100 | [diff] [blame] | 465 | /*** |
| 466 | * NAME |
| 467 | * flt_ot_deinit_per_thread - |
| 468 | * |
| 469 | * ARGUMENTS |
| 470 | * p - |
| 471 | * fconf - |
| 472 | * |
| 473 | * DESCRIPTION |
| 474 | * It cleans up what the init_per_thread callback have done. It is called |
| 475 | * in the context of a thread, before exiting it. |
| 476 | * |
| 477 | * RETURN VALUE |
| 478 | * This function does not return a value. |
| 479 | */ |
| 480 | static void flt_ot_deinit_per_thread(struct proxy *p, struct flt_conf *fconf) |
| 481 | { |
| 482 | FLT_OT_FUNC("%p, %p", p, fconf); |
| 483 | |
| 484 | FLT_OT_RETURN(); |
| 485 | } |
| 486 | |
| 487 | #endif /* DEBUG_OT */ |
| 488 | |
| 489 | |
| 490 | /*** |
| 491 | * NAME |
| 492 | * flt_ot_attach - Called when a filter instance is created and attach to a stream. |
| 493 | * |
| 494 | * ARGUMENTS |
| 495 | * s - |
| 496 | * f - |
| 497 | * |
| 498 | * DESCRIPTION |
| 499 | * It is called after a filter instance creation, when it is attached to a |
| 500 | * stream. This happens when the stream is started for filters defined on |
| 501 | * the stream's frontend and when the backend is set for filters declared |
| 502 | * on the stream's backend. It is possible to ignore the filter, if needed, |
| 503 | * by returning 0. This could be useful to have conditional filtering. |
| 504 | * |
| 505 | * RETURN VALUE |
| 506 | * Returns a negative value if an error occurs, 0 to ignore the filter, |
| 507 | * any other value otherwise. |
| 508 | */ |
| 509 | static int flt_ot_attach(struct stream *s, struct filter *f) |
| 510 | { |
| 511 | const struct flt_ot_conf *conf = FLT_OT_CONF(f); |
| 512 | char *err = NULL; |
| 513 | |
| 514 | FLT_OT_FUNC("%p, %p", s, f); |
| 515 | |
| 516 | if (conf->tracer->flag_disabled) { |
| 517 | FLT_OT_DBG(2, "filter '%s', type: %s (disabled)", conf->id, flt_ot_type(f)); |
| 518 | |
| 519 | FLT_OT_RETURN(FLT_OT_RET_IGNORE); |
| 520 | } |
| 521 | else if (conf->tracer->rate_limit < FLT_OT_FLOAT_U32(FLT_OT_RATE_LIMIT_MAX, FLT_OT_RATE_LIMIT_MAX)) { |
| 522 | uint32_t rnd = ha_random32(); |
| 523 | |
| 524 | if (conf->tracer->rate_limit <= rnd) { |
| 525 | FLT_OT_DBG(2, "filter '%s', type: %s (ignored: %u <= %u)", conf->id, flt_ot_type(f), conf->tracer->rate_limit, rnd); |
| 526 | |
| 527 | FLT_OT_RETURN(FLT_OT_RET_IGNORE); |
| 528 | } |
| 529 | } |
| 530 | |
| 531 | FLT_OT_DBG(2, "filter '%s', type: %s (run)", conf->id, flt_ot_type(f)); |
| 532 | |
| 533 | f->ctx = flt_ot_runtime_context_init(s, f, &err); |
| 534 | FLT_OT_ERR_FREE(err); |
| 535 | if (f->ctx == NULL) { |
| 536 | FLT_OT_LOG(LOG_EMERG, "failed to create context"); |
| 537 | |
| 538 | FLT_OT_RETURN(FLT_OT_RET_IGNORE); |
| 539 | } |
| 540 | |
| 541 | /* |
| 542 | * AN_REQ_WAIT_HTTP and AN_RES_WAIT_HTTP analyzers can only be used |
| 543 | * in the .channel_post_analyze callback function. |
| 544 | */ |
| 545 | f->pre_analyzers |= conf->tracer->analyzers & ((AN_REQ_ALL & ~AN_REQ_WAIT_HTTP & ~AN_REQ_HTTP_TARPIT) | (AN_RES_ALL & ~AN_RES_WAIT_HTTP)); |
| 546 | f->post_analyzers |= conf->tracer->analyzers & (AN_REQ_WAIT_HTTP | AN_RES_WAIT_HTTP); |
| 547 | |
| 548 | FLT_OT_LOG(LOG_INFO, "%08x %08x", f->pre_analyzers, f->post_analyzers); |
| 549 | |
| 550 | flt_ot_vars_dump(s); |
| 551 | flt_ot_http_headers_dump(&(s->req)); |
| 552 | |
| 553 | FLT_OT_RETURN(FLT_OT_RET_OK); |
| 554 | } |
| 555 | |
| 556 | |
| 557 | #ifdef DEBUG_OT |
| 558 | |
| 559 | /*** |
| 560 | * NAME |
| 561 | * flt_ot_stream_start - Called when a stream is created. |
| 562 | * |
| 563 | * ARGUMENTS |
| 564 | * s - |
| 565 | * f - |
| 566 | * |
| 567 | * DESCRIPTION |
| 568 | * It is called when a stream is started. This callback can fail by |
| 569 | * returning a negative value. It will be considered as a critical error |
| 570 | * by HAProxy which disabled the listener for a short time. |
| 571 | * |
| 572 | * RETURN VALUE |
| 573 | * Returns a negative value if an error occurs, any other value otherwise. |
| 574 | */ |
| 575 | static int flt_ot_stream_start(struct stream *s, struct filter *f) |
| 576 | { |
| 577 | char *err = NULL; |
| 578 | int retval = FLT_OT_RET_OK; |
| 579 | |
| 580 | FLT_OT_FUNC("%p, %p", s, f); |
| 581 | |
| 582 | if (flt_ot_is_disabled(f FLT_OT_DBG_ARGS(, -1))) |
| 583 | FLT_OT_RETURN(retval); |
| 584 | |
| 585 | FLT_OT_RETURN(flt_ot_return_int(f, &err, retval)); |
| 586 | } |
| 587 | |
| 588 | |
| 589 | /*** |
| 590 | * NAME |
| 591 | * flt_ot_stream_set_backend - Called when a backend is set for a stream. |
| 592 | * |
| 593 | * ARGUMENTS |
| 594 | * s - |
| 595 | * f - |
| 596 | * be - |
| 597 | * |
| 598 | * DESCRIPTION |
| 599 | * It is called when a backend is set for a stream. This callbacks will be |
| 600 | * called for all filters attached to a stream (frontend and backend). Note |
| 601 | * this callback is not called if the frontend and the backend are the same. |
| 602 | * |
| 603 | * RETURN VALUE |
| 604 | * Returns a negative value if an error occurs, any other value otherwise. |
| 605 | */ |
| 606 | static int flt_ot_stream_set_backend(struct stream *s, struct filter *f, struct proxy *be) |
| 607 | { |
| 608 | char *err = NULL; |
| 609 | int retval = FLT_OT_RET_OK; |
| 610 | |
| 611 | FLT_OT_FUNC("%p, %p, %p", s, f, be); |
| 612 | |
| 613 | if (flt_ot_is_disabled(f FLT_OT_DBG_ARGS(, -1))) |
| 614 | FLT_OT_RETURN(retval); |
| 615 | |
| 616 | FLT_OT_DBG(3, "backend: %s", be->id); |
| 617 | |
| 618 | FLT_OT_RETURN(flt_ot_return_int(f, &err, retval)); |
| 619 | } |
| 620 | |
| 621 | |
| 622 | /*** |
| 623 | * NAME |
| 624 | * flt_ot_stream_stop - Called when a stream is destroyed. |
| 625 | * |
| 626 | * ARGUMENTS |
| 627 | * s - |
| 628 | * f - |
| 629 | * |
| 630 | * DESCRIPTION |
| 631 | * It is called when a stream is stopped. This callback always succeed. |
| 632 | * Anyway, it is too late to return an error. |
| 633 | * |
| 634 | * RETURN VALUE |
| 635 | * This function does not return a value. |
| 636 | */ |
| 637 | static void flt_ot_stream_stop(struct stream *s, struct filter *f) |
| 638 | { |
| 639 | char *err = NULL; |
| 640 | |
| 641 | FLT_OT_FUNC("%p, %p", s, f); |
| 642 | |
| 643 | if (flt_ot_is_disabled(f FLT_OT_DBG_ARGS(, -1))) |
| 644 | FLT_OT_RETURN(); |
| 645 | |
| 646 | flt_ot_return_void(f, &err); |
| 647 | |
| 648 | FLT_OT_RETURN(); |
| 649 | } |
| 650 | |
| 651 | #endif /* DEBUG_OT */ |
| 652 | |
| 653 | |
| 654 | /*** |
| 655 | * NAME |
| 656 | * flt_ot_detach - Called when a filter instance is detach from a stream, just before its destruction. |
| 657 | * |
| 658 | * ARGUMENTS |
| 659 | * s - |
| 660 | * f - |
| 661 | * |
| 662 | * DESCRIPTION |
| 663 | * It is called when a filter instance is detached from a stream, before its |
| 664 | * destruction. This happens when the stream is stopped for filters defined |
| 665 | * on the stream's frontend and when the analyze ends for filters defined on |
| 666 | * the stream's backend. |
| 667 | * |
| 668 | * RETURN VALUE |
| 669 | * This function does not return a value. |
| 670 | */ |
| 671 | static void flt_ot_detach(struct stream *s, struct filter *f) |
| 672 | { |
| 673 | FLT_OT_FUNC("%p, %p", s, f); |
| 674 | |
| 675 | FLT_OT_DBG(2, "filter '%s', type: %s", FLT_OT_CONF(f)->id, flt_ot_type(f)); |
| 676 | |
| 677 | flt_ot_runtime_context_free(f); |
| 678 | |
| 679 | FLT_OT_RETURN(); |
| 680 | } |
| 681 | |
| 682 | |
| 683 | /*** |
| 684 | * NAME |
| 685 | * flt_ot_check_timeouts - Called when a stream is woken up because of an expired timer. |
| 686 | * |
| 687 | * ARGUMENTS |
| 688 | * s - |
| 689 | * f - |
| 690 | * |
| 691 | * DESCRIPTION |
| 692 | * - |
| 693 | * |
| 694 | * RETURN VALUE |
| 695 | * This function does not return a value. |
| 696 | */ |
| 697 | static void flt_ot_check_timeouts(struct stream *s, struct filter *f) |
| 698 | { |
| 699 | char *err = NULL; |
| 700 | |
| 701 | FLT_OT_FUNC("%p, %p", s, f); |
| 702 | |
| 703 | if (flt_ot_is_disabled(f FLT_OT_DBG_ARGS(, -1))) |
| 704 | FLT_OT_RETURN(); |
| 705 | |
| 706 | s->pending_events |= TASK_WOKEN_MSG; |
| 707 | |
| 708 | flt_ot_return_void(f, &err); |
| 709 | |
| 710 | FLT_OT_RETURN(); |
| 711 | } |
| 712 | |
| 713 | |
| 714 | /*** |
| 715 | * NAME |
| 716 | * flt_ot_channel_start_analyze - Called when analyze starts for a given channel. |
| 717 | * |
| 718 | * ARGUMENTS |
| 719 | * s - |
| 720 | * f - |
| 721 | * chn - |
| 722 | * |
| 723 | * DESCRIPTION |
| 724 | * - |
| 725 | * |
| 726 | * RETURN VALUE |
| 727 | * Returns a negative value if an error occurs, 0 if it needs to wait, |
| 728 | * any other value otherwise. |
| 729 | */ |
| 730 | static int flt_ot_channel_start_analyze(struct stream *s, struct filter *f, struct channel *chn) |
| 731 | { |
| 732 | char *err = NULL; |
| 733 | int retval; |
| 734 | |
| 735 | FLT_OT_FUNC("%p, %p, %p", s, f, chn); |
| 736 | |
| 737 | if (flt_ot_is_disabled(f FLT_OT_DBG_ARGS(, (chn->flags & CF_ISRESP) ? FLT_OT_EVENT_RES_SERVER_SESS_START : FLT_OT_EVENT_REQ_CLIENT_SESS_START))) |
| 738 | FLT_OT_RETURN(FLT_OT_RET_OK); |
| 739 | |
| 740 | FLT_OT_DBG(3, "channel: %s, mode: %s (%s)", flt_ot_chn_label(chn), flt_ot_pr_mode(s), flt_ot_stream_pos(s)); |
| 741 | |
| 742 | if (chn->flags & CF_ISRESP) { |
| 743 | /* The response channel. */ |
| 744 | chn->analysers |= f->pre_analyzers & AN_RES_ALL; |
| 745 | |
| 746 | /* The event 'on-server-session-start'. */ |
| 747 | retval = flt_ot_event_run(s, f, chn, FLT_OT_EVENT_RES_SERVER_SESS_START, &err); |
| 748 | if (retval == FLT_OT_RET_WAIT) { |
| 749 | channel_dont_read(chn); |
| 750 | channel_dont_close(chn); |
| 751 | } |
| 752 | } else { |
| 753 | /* The request channel. */ |
| 754 | chn->analysers |= f->pre_analyzers & AN_REQ_ALL; |
| 755 | |
| 756 | /* The event 'on-client-session-start'. */ |
| 757 | retval = flt_ot_event_run(s, f, chn, FLT_OT_EVENT_REQ_CLIENT_SESS_START, &err); |
| 758 | } |
| 759 | |
| 760 | // register_data_filter(s, chn, f); |
| 761 | |
| 762 | FLT_OT_RETURN(flt_ot_return_int(f, &err, retval)); |
| 763 | } |
| 764 | |
| 765 | |
| 766 | /*** |
| 767 | * NAME |
| 768 | * flt_ot_channel_pre_analyze - Called before a processing happens on a given channel. |
| 769 | * |
| 770 | * ARGUMENTS |
| 771 | * s - |
| 772 | * f - |
| 773 | * chn - the channel on which the analyzing is done |
| 774 | * an_bit - the analyzer id |
| 775 | * |
| 776 | * DESCRIPTION |
| 777 | * - |
| 778 | * |
| 779 | * RETURN VALUE |
| 780 | * Returns a negative value if an error occurs, 0 if it needs to wait, |
| 781 | * any other value otherwise. |
| 782 | */ |
| 783 | static int flt_ot_channel_pre_analyze(struct stream *s, struct filter *f, struct channel *chn, uint an_bit) |
| 784 | { |
| 785 | char *err = NULL; |
| 786 | int i, event = -1, retval; |
| 787 | |
| 788 | FLT_OT_FUNC("%p, %p, %p, 0x%08x", s, f, chn, an_bit); |
| 789 | |
| 790 | for (i = 0; i < FLT_OT_TABLESIZE(flt_ot_event_data); i++) |
| 791 | if (flt_ot_event_data[i].an_bit == an_bit) { |
| 792 | event = i; |
| 793 | |
| 794 | break; |
| 795 | } |
| 796 | |
| 797 | if (flt_ot_is_disabled(f FLT_OT_DBG_ARGS(, event))) |
| 798 | FLT_OT_RETURN(FLT_OT_RET_OK); |
| 799 | |
| 800 | FLT_OT_DBG(3, "channel: %s, mode: %s (%s), analyzer: %s", flt_ot_chn_label(chn), flt_ot_pr_mode(s), flt_ot_stream_pos(s), flt_ot_analyzer(an_bit)); |
| 801 | |
| 802 | retval = flt_ot_event_run(s, f, chn, event, &err); |
| 803 | |
| 804 | if ((retval == FLT_OT_RET_WAIT) && (chn->flags & CF_ISRESP)) { |
| 805 | channel_dont_read(chn); |
| 806 | channel_dont_close(chn); |
| 807 | } |
| 808 | |
| 809 | FLT_OT_RETURN(flt_ot_return_int(f, &err, retval)); |
| 810 | } |
| 811 | |
| 812 | |
| 813 | /*** |
| 814 | * NAME |
| 815 | * flt_ot_channel_post_analyze - Called after a processing happens on a given channel. |
| 816 | * |
| 817 | * ARGUMENTS |
| 818 | * s - |
| 819 | * f - |
| 820 | * chn - |
| 821 | * an_bit - |
| 822 | * |
| 823 | * DESCRIPTION |
| 824 | * This function, for its part, is not resumable. It is called when a |
| 825 | * filterable analyzer finishes its processing. So it called once for |
| 826 | * the same analyzer. |
| 827 | * |
| 828 | * RETURN VALUE |
| 829 | * Returns a negative value if an error occurs, 0 if it needs to wait, |
| 830 | * any other value otherwise. |
| 831 | */ |
| 832 | static int flt_ot_channel_post_analyze(struct stream *s, struct filter *f, struct channel *chn, uint an_bit) |
| 833 | { |
| 834 | char *err = NULL; |
| 835 | int i, event = -1, retval; |
| 836 | |
| 837 | FLT_OT_FUNC("%p, %p, %p, 0x%08x", s, f, chn, an_bit); |
| 838 | |
| 839 | for (i = 0; i < FLT_OT_TABLESIZE(flt_ot_event_data); i++) |
| 840 | if (flt_ot_event_data[i].an_bit == an_bit) { |
| 841 | event = i; |
| 842 | |
| 843 | break; |
| 844 | } |
| 845 | |
| 846 | if (flt_ot_is_disabled(f FLT_OT_DBG_ARGS(, event))) |
| 847 | FLT_OT_RETURN(FLT_OT_RET_OK); |
| 848 | |
| 849 | FLT_OT_DBG(3, "channel: %s, mode: %s (%s), analyzer: %s", flt_ot_chn_label(chn), flt_ot_pr_mode(s), flt_ot_stream_pos(s), flt_ot_analyzer(an_bit)); |
| 850 | |
| 851 | retval = flt_ot_event_run(s, f, chn, event, &err); |
| 852 | |
| 853 | FLT_OT_RETURN(flt_ot_return_int(f, &err, retval)); |
| 854 | } |
| 855 | |
| 856 | |
| 857 | /*** |
| 858 | * NAME |
| 859 | * flt_ot_channel_end_analyze - Called when analyze ends for a given channel. |
| 860 | * |
| 861 | * ARGUMENTS |
| 862 | * s - |
| 863 | * f - |
| 864 | * chn - |
| 865 | * |
| 866 | * DESCRIPTION |
| 867 | * - |
| 868 | * |
| 869 | * RETURN VALUE |
| 870 | * Returns a negative value if an error occurs, 0 if it needs to wait, |
| 871 | * any other value otherwise. |
| 872 | */ |
| 873 | static int flt_ot_channel_end_analyze(struct stream *s, struct filter *f, struct channel *chn) |
| 874 | { |
| 875 | char *err = NULL; |
| 876 | int rc, retval; |
| 877 | |
| 878 | FLT_OT_FUNC("%p, %p, %p", s, f, chn); |
| 879 | |
| 880 | if (flt_ot_is_disabled(f FLT_OT_DBG_ARGS(, (chn->flags & CF_ISRESP) ? FLT_OT_EVENT_RES_SERVER_SESS_END : FLT_OT_EVENT_REQ_CLIENT_SESS_END))) |
| 881 | FLT_OT_RETURN(FLT_OT_RET_OK); |
| 882 | |
| 883 | FLT_OT_DBG(3, "channel: %s, mode: %s (%s)", flt_ot_chn_label(chn), flt_ot_pr_mode(s), flt_ot_stream_pos(s)); |
| 884 | |
| 885 | if (chn->flags & CF_ISRESP) { |
| 886 | /* The response channel, event 'on-server-session-end'. */ |
| 887 | retval = flt_ot_event_run(s, f, chn, FLT_OT_EVENT_RES_SERVER_SESS_END, &err); |
| 888 | } else { |
| 889 | /* The request channel, event 'on-client-session-end'. */ |
| 890 | retval = flt_ot_event_run(s, f, chn, FLT_OT_EVENT_REQ_CLIENT_SESS_END, &err); |
| 891 | |
| 892 | /* |
| 893 | * In case an event using server response is defined and not |
| 894 | * executed, event 'on-server-unavailable' is called here. |
| 895 | */ |
| 896 | if ((FLT_OT_CONF(f)->tracer->analyzers & AN_RES_ALL) && !(FLT_OT_RT_CTX(f->ctx)->analyzers & AN_RES_ALL)) { |
| 897 | rc = flt_ot_event_run(s, f, chn, FLT_OT_EVENT_REQ_SERVER_UNAVAILABLE, &err); |
| 898 | if ((retval == FLT_OT_RET_OK) && (rc != FLT_OT_RET_OK)) |
| 899 | retval = rc; |
| 900 | } |
| 901 | } |
| 902 | |
| 903 | FLT_OT_RETURN(flt_ot_return_int(f, &err, retval)); |
| 904 | } |
| 905 | |
| 906 | |
| 907 | #ifdef DEBUG_OT |
| 908 | |
| 909 | /*** |
| 910 | * NAME |
| 911 | * flt_ot_http_headers - |
| 912 | * |
| 913 | * ARGUMENTS |
| 914 | * s - |
| 915 | * f - |
| 916 | * msg - |
| 917 | * |
| 918 | * DESCRIPTION |
| 919 | * - |
| 920 | * |
| 921 | * RETURN VALUE |
| 922 | * Returns a negative value if an error occurs, 0 if it needs to wait, |
| 923 | * any other value otherwise. |
| 924 | */ |
| 925 | static int flt_ot_http_headers(struct stream *s, struct filter *f, struct http_msg *msg) |
| 926 | { |
| 927 | char *err = NULL; |
| 928 | struct htx *htx = htxbuf(&(msg->chn->buf)); |
| 929 | struct htx_sl *sl = http_get_stline(htx); |
| 930 | int retval = FLT_OT_RET_OK; |
| 931 | |
| 932 | FLT_OT_FUNC("%p, %p, %p", s, f, msg); |
| 933 | |
| 934 | if (flt_ot_is_disabled(f FLT_OT_DBG_ARGS(, -1))) |
| 935 | FLT_OT_RETURN(retval); |
| 936 | |
| 937 | FLT_OT_DBG(3, "channel: %s, mode: %s (%s), %.*s %.*s %.*s", flt_ot_chn_label(msg->chn), flt_ot_pr_mode(s), flt_ot_stream_pos(s), HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl), HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl), HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl)); |
| 938 | |
| 939 | FLT_OT_RETURN(flt_ot_return_int(f, &err, retval)); |
| 940 | } |
| 941 | |
| 942 | |
| 943 | /*** |
| 944 | * NAME |
| 945 | * flt_ot_http_payload - |
| 946 | * |
| 947 | * ARGUMENTS |
| 948 | * s - |
| 949 | * f - |
| 950 | * msg - |
| 951 | * offset - |
| 952 | * len - |
| 953 | * |
| 954 | * DESCRIPTION |
| 955 | * - |
| 956 | * |
| 957 | * RETURN VALUE |
| 958 | * Returns a negative value if an error occurs, any other value otherwise. |
| 959 | */ |
| 960 | static int flt_ot_http_payload(struct stream *s, struct filter *f, struct http_msg *msg, uint offset, uint len) |
| 961 | { |
| 962 | char *err = NULL; |
| 963 | int retval = len; |
| 964 | |
| 965 | FLT_OT_FUNC("%p, %p, %p, %u, %u", s, f, msg, offset, len); |
| 966 | |
| 967 | if (flt_ot_is_disabled(f FLT_OT_DBG_ARGS(, -1))) |
| 968 | FLT_OT_RETURN(len); |
| 969 | |
| 970 | FLT_OT_DBG(3, "channel: %s, mode: %s (%s), offset: %u, len: %u, forward: %d", flt_ot_chn_label(msg->chn), flt_ot_pr_mode(s), flt_ot_stream_pos(s), offset, len, retval); |
| 971 | |
| 972 | if (retval != len) |
| 973 | task_wakeup(s->task, TASK_WOKEN_MSG); |
| 974 | |
| 975 | FLT_OT_RETURN(flt_ot_return_int(f, &err, retval)); |
| 976 | } |
| 977 | |
| 978 | |
| 979 | /*** |
| 980 | * NAME |
| 981 | * flt_ot_http_end - |
| 982 | * |
| 983 | * ARGUMENTS |
| 984 | * s - |
| 985 | * f - |
| 986 | * msg - |
| 987 | * |
| 988 | * DESCRIPTION |
| 989 | * - |
| 990 | * |
| 991 | * RETURN VALUE |
| 992 | * Returns a negative value if an error occurs, 0 if it needs to wait, |
| 993 | * any other value otherwise. |
| 994 | */ |
| 995 | static int flt_ot_http_end(struct stream *s, struct filter *f, struct http_msg *msg) |
| 996 | { |
| 997 | char *err = NULL; |
| 998 | int retval = FLT_OT_RET_OK; |
| 999 | |
| 1000 | FLT_OT_FUNC("%p, %p, %p", s, f, msg); |
| 1001 | |
| 1002 | if (flt_ot_is_disabled(f FLT_OT_DBG_ARGS(, -1))) |
| 1003 | FLT_OT_RETURN(retval); |
| 1004 | |
| 1005 | FLT_OT_DBG(3, "channel: %s, mode: %s (%s)", flt_ot_chn_label(msg->chn), flt_ot_pr_mode(s), flt_ot_stream_pos(s)); |
| 1006 | |
| 1007 | FLT_OT_RETURN(flt_ot_return_int(f, &err, retval)); |
| 1008 | } |
| 1009 | |
| 1010 | |
| 1011 | /*** |
| 1012 | * NAME |
| 1013 | * flt_ot_http_reset - |
| 1014 | * |
| 1015 | * ARGUMENTS |
| 1016 | * s - |
| 1017 | * f - |
| 1018 | * msg - |
| 1019 | * |
| 1020 | * DESCRIPTION |
| 1021 | * - |
| 1022 | * |
| 1023 | * RETURN VALUE |
| 1024 | * This function does not return a value. |
| 1025 | */ |
| 1026 | static void flt_ot_http_reset(struct stream *s, struct filter *f, struct http_msg *msg) |
| 1027 | { |
| 1028 | char *err = NULL; |
| 1029 | |
| 1030 | FLT_OT_FUNC("%p, %p, %p", s, f, msg); |
| 1031 | |
| 1032 | if (flt_ot_is_disabled(f FLT_OT_DBG_ARGS(, -1))) |
| 1033 | FLT_OT_RETURN(); |
| 1034 | |
| 1035 | FLT_OT_DBG(3, "channel: %s, mode: %s (%s)", flt_ot_chn_label(msg->chn), flt_ot_pr_mode(s), flt_ot_stream_pos(s)); |
| 1036 | |
| 1037 | flt_ot_return_void(f, &err); |
| 1038 | |
| 1039 | FLT_OT_RETURN(); |
| 1040 | } |
| 1041 | |
| 1042 | |
| 1043 | /*** |
| 1044 | * NAME |
| 1045 | * flt_ot_http_reply - |
| 1046 | * |
| 1047 | * ARGUMENTS |
| 1048 | * s - |
| 1049 | * f - |
| 1050 | * status - |
| 1051 | * msg - |
| 1052 | * |
| 1053 | * DESCRIPTION |
| 1054 | * - |
| 1055 | * |
| 1056 | * RETURN VALUE |
| 1057 | * This function does not return a value. |
| 1058 | */ |
| 1059 | static void flt_ot_http_reply(struct stream *s, struct filter *f, short status, const struct buffer *msg) |
| 1060 | { |
| 1061 | char *err = NULL; |
| 1062 | |
| 1063 | FLT_OT_FUNC("%p, %p, %hd, %p", s, f, status, msg); |
| 1064 | |
| 1065 | if (flt_ot_is_disabled(f FLT_OT_DBG_ARGS(, -1))) |
| 1066 | FLT_OT_RETURN(); |
| 1067 | |
| 1068 | FLT_OT_DBG(3, "channel: -, mode: %s (%s)", flt_ot_pr_mode(s), flt_ot_stream_pos(s)); |
| 1069 | |
| 1070 | flt_ot_return_void(f, &err); |
| 1071 | |
| 1072 | FLT_OT_RETURN(); |
| 1073 | } |
| 1074 | |
| 1075 | |
| 1076 | /*** |
| 1077 | * NAME |
| 1078 | * flt_ot_tcp_payload - |
| 1079 | * |
| 1080 | * ARGUMENTS |
| 1081 | * s - |
| 1082 | * f - |
| 1083 | * chn - |
| 1084 | * offset - |
| 1085 | * len - |
| 1086 | * |
| 1087 | * DESCRIPTION |
| 1088 | * - |
| 1089 | * |
| 1090 | * RETURN VALUE |
| 1091 | * Returns a negative value if an error occurs, any other value otherwise. |
| 1092 | */ |
| 1093 | static int flt_ot_tcp_payload(struct stream *s, struct filter *f, struct channel *chn, uint offset, uint len) |
| 1094 | { |
| 1095 | char *err = NULL; |
| 1096 | int retval = len; |
| 1097 | |
| 1098 | FLT_OT_FUNC("%p, %p, %p, %u, %u", s, f, chn, offset, len); |
| 1099 | |
| 1100 | if (flt_ot_is_disabled(f FLT_OT_DBG_ARGS(, -1))) |
| 1101 | FLT_OT_RETURN(len); |
| 1102 | |
| 1103 | FLT_OT_DBG(3, "channel: %s, mode: %s (%s), offset: %u, len: %u, forward: %d", flt_ot_chn_label(chn), flt_ot_pr_mode(s), flt_ot_stream_pos(s), offset, len, retval); |
| 1104 | |
| 1105 | if (s->flags & SF_HTX) { |
| 1106 | } else { |
| 1107 | } |
| 1108 | |
| 1109 | if (retval != len) |
| 1110 | task_wakeup(s->task, TASK_WOKEN_MSG); |
| 1111 | |
| 1112 | FLT_OT_RETURN(flt_ot_return_int(f, &err, retval)); |
| 1113 | } |
| 1114 | |
| 1115 | #endif /* DEBUG_OT */ |
| 1116 | |
| 1117 | |
| 1118 | struct flt_ops flt_ot_ops = { |
| 1119 | /* Callbacks to manage the filter lifecycle. */ |
| 1120 | .init = flt_ot_init, |
| 1121 | .deinit = flt_ot_deinit, |
| 1122 | .check = flt_ot_check, |
Miroslav Zagorac | f226343 | 2021-04-02 04:25:47 +0200 | [diff] [blame^] | 1123 | .init_per_thread = flt_ot_init_per_thread, |
Miroslav Zagorac | 70230c6 | 2020-12-09 16:54:31 +0100 | [diff] [blame] | 1124 | .deinit_per_thread = FLT_OT_DBG_IFDEF(flt_ot_deinit_per_thread, NULL), |
| 1125 | |
| 1126 | /* Stream callbacks. */ |
| 1127 | .attach = flt_ot_attach, |
| 1128 | .stream_start = FLT_OT_DBG_IFDEF(flt_ot_stream_start, NULL), |
| 1129 | .stream_set_backend = FLT_OT_DBG_IFDEF(flt_ot_stream_set_backend, NULL), |
| 1130 | .stream_stop = FLT_OT_DBG_IFDEF(flt_ot_stream_stop, NULL), |
| 1131 | .detach = flt_ot_detach, |
| 1132 | .check_timeouts = flt_ot_check_timeouts, |
| 1133 | |
| 1134 | /* Channel callbacks. */ |
| 1135 | .channel_start_analyze = flt_ot_channel_start_analyze, |
| 1136 | .channel_pre_analyze = flt_ot_channel_pre_analyze, |
| 1137 | .channel_post_analyze = flt_ot_channel_post_analyze, |
| 1138 | .channel_end_analyze = flt_ot_channel_end_analyze, |
| 1139 | |
| 1140 | /* HTTP callbacks. */ |
| 1141 | .http_headers = FLT_OT_DBG_IFDEF(flt_ot_http_headers, NULL), |
| 1142 | .http_payload = FLT_OT_DBG_IFDEF(flt_ot_http_payload, NULL), |
| 1143 | .http_end = FLT_OT_DBG_IFDEF(flt_ot_http_end, NULL), |
| 1144 | .http_reset = FLT_OT_DBG_IFDEF(flt_ot_http_reset, NULL), |
| 1145 | .http_reply = FLT_OT_DBG_IFDEF(flt_ot_http_reply, NULL), |
| 1146 | |
| 1147 | /* TCP callbacks. */ |
| 1148 | .tcp_payload = FLT_OT_DBG_IFDEF(flt_ot_tcp_payload, NULL) |
| 1149 | }; |
| 1150 | |
| 1151 | |
| 1152 | REGISTER_BUILD_OPTS("Built with OpenTracing support."); |
| 1153 | |
| 1154 | /* |
| 1155 | * Local variables: |
| 1156 | * c-indent-level: 8 |
| 1157 | * c-basic-offset: 8 |
| 1158 | * End: |
| 1159 | * |
| 1160 | * vi: noexpandtab shiftwidth=8 tabstop=8 |
| 1161 | */ |