hwdriver.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <stdlib.h>
  21 #include <stdio.h>
  22 #include <sys/types.h>
  23 #include <dirent.h>
  24 #include <string.h>
  25 #include <glib.h>
  26 #include "config.h" /* Needed for HAVE_LIBUSB_1_0 and others. */
  27 #include "libsigrok.h"
  28 #include "libsigrok-internal.h"
  29
  30 /* Message logging helpers with subsystem-specific prefix string. */
  31 #define LOG_PREFIX "hwdriver: "
  32 #define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
  33 #define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
  34 #define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
  35 #define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
  36 #define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
  37 #define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
  38
  39 /**
  40  * @file
  41  *
  42  * Hardware driver handling in libsigrok.
  43  */
  44
  45 /**
  46  * @defgroup grp_driver Hardware drivers
  47  *
  48  * Hardware driver handling in libsigrok.
  49  *
  50  * @{
  51  */
  52
  53 static struct sr_config_info sr_config_info_data[] = {
  54         {SR_CONF_CONN, SR_T_CHAR, "conn",
  55                 "Connection", NULL},
  56         {SR_CONF_SERIALCOMM, SR_T_CHAR, "serialcomm",
  57                 "Serial communication", NULL},
  58         {SR_CONF_SAMPLERATE, SR_T_UINT64, "samplerate",
  59                 "Sample rate", NULL},
  60         {SR_CONF_CAPTURE_RATIO, SR_T_UINT64, "captureratio",
  61                 "Pre-trigger capture ratio", NULL},
  62         {SR_CONF_PATTERN_MODE, SR_T_CHAR, "pattern",
  63                 "Pattern generator mode", NULL},
  64         {SR_CONF_TRIGGER_TYPE, SR_T_CHAR, "triggertype",
  65                 "Trigger types", NULL},
  66         {SR_CONF_RLE, SR_T_BOOL, "rle",
  67                 "Run Length Encoding", NULL},
  68         {SR_CONF_TRIGGER_SLOPE, SR_T_UINT64, "triggerslope",
  69                 "Trigger slope", NULL},
  70         {SR_CONF_TRIGGER_SOURCE, SR_T_CHAR, "triggersource",
  71                 "Trigger source", NULL},
  72         {SR_CONF_HORIZ_TRIGGERPOS, SR_T_FLOAT, "horiz_triggerpos",
  73                 "Horizontal trigger position", NULL},
  74         {SR_CONF_BUFFERSIZE, SR_T_UINT64, "buffersize",
  75                 "Buffer size", NULL},
  76         {SR_CONF_TIMEBASE, SR_T_RATIONAL_PERIOD, "timebase",
  77                 "Time base", NULL},
  78         {SR_CONF_FILTER, SR_T_CHAR, "filter",
  79                 "Filter targets", NULL},
  80         {SR_CONF_VDIV, SR_T_RATIONAL_VOLT, "vdiv",
  81                 "Volts/div", NULL},
  82         {SR_CONF_COUPLING, SR_T_CHAR, "coupling",
  83                 "Coupling", NULL},
  84         {SR_CONF_DATALOG, SR_T_BOOL, "datalog",
  85                 "Datalog", NULL},
  86         {SR_CONF_SPL_WEIGHT_FREQ, SR_T_CHAR, "spl_weight_freq",
  87                 "Sound pressure level frequency weighting", NULL},
  88         {SR_CONF_SPL_WEIGHT_TIME, SR_T_CHAR, "spl_weight_time",
  89                 "Sound pressure level time weighting", NULL},
  90         {SR_CONF_HOLD_MAX, SR_T_BOOL, "hold_max",
  91                 "Hold max", NULL},
  92         {SR_CONF_HOLD_MIN, SR_T_BOOL, "hold_min",
  93                 "Hold min", NULL},
  94         {SR_CONF_SPL_MEASUREMENT_RANGE, SR_T_UINT64_RANGE, "spl_meas_range",
  95                 "Sound pressure level measurement range", NULL},
  96         {0, 0, NULL, NULL, NULL},
  97 };
  98
  99 /** @cond PRIVATE */
 100 #ifdef HAVE_HW_BRYMEN_DMM
 101 extern SR_PRIV struct sr_dev_driver brymen_bm857_driver_info;
 102 #endif
 103 #ifdef HAVE_HW_CEM_DT_885X
 104 extern SR_PRIV struct sr_dev_driver cem_dt_885x_driver_info;
 105 #endif
 106 #ifdef HAVE_HW_COLEAD_SLM
 107 extern SR_PRIV struct sr_dev_driver colead_slm_driver_info;
 108 #endif
 109 #ifdef HAVE_HW_DEMO
 110 extern SR_PRIV struct sr_dev_driver demo_driver_info;
 111 #endif
 112 #ifdef HAVE_HW_IKALOGIC_SCANALOGIC2
 113 extern SR_PRIV struct sr_dev_driver ikalogic_scanalogic2_driver_info;
 114 #endif
 115 #ifdef HAVE_HW_LASCAR_EL_USB
 116 extern SR_PRIV struct sr_dev_driver lascar_el_usb_driver_info;
 117 #endif
 118 #ifdef HAVE_HW_MIC_985XX
 119 extern SR_PRIV struct sr_dev_driver mic_98581_driver_info;
 120 extern SR_PRIV struct sr_dev_driver mic_98583_driver_info;
 121 #endif
 122 #ifdef HAVE_HW_NEXUS_OSCIPRIME
 123 extern SR_PRIV struct sr_dev_driver nexus_osciprime_driver_info;
 124 #endif
 125 #ifdef HAVE_HW_OLS
 126 extern SR_PRIV struct sr_dev_driver ols_driver_info;
 127 #endif
 128 #ifdef HAVE_HW_RIGOL_DS1XX2
 129 extern SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info;
 130 #endif
 131 #ifdef HAVE_HW_TONDAJ_SL_814
 132 extern SR_PRIV struct sr_dev_driver tondaj_sl_814_driver_info;
 133 #endif
 134 #ifdef HAVE_HW_VICTOR_DMM
 135 extern SR_PRIV struct sr_dev_driver victor_dmm_driver_info;
 136 #endif
 137 #ifdef HAVE_HW_ZEROPLUS_LOGIC_CUBE
 138 extern SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info;
 139 #endif
 140 #ifdef HAVE_HW_ASIX_SIGMA
 141 extern SR_PRIV struct sr_dev_driver asix_sigma_driver_info;
 142 #endif
 143 #ifdef HAVE_HW_CHRONOVU_LA8
 144 extern SR_PRIV struct sr_dev_driver chronovu_la8_driver_info;
 145 #endif
 146 #ifdef HAVE_HW_LINK_MSO19
 147 extern SR_PRIV struct sr_dev_driver link_mso19_driver_info;
 148 #endif
 149 #ifdef HAVE_HW_ALSA
 150 extern SR_PRIV struct sr_dev_driver alsa_driver_info;
 151 #endif
 152 #ifdef HAVE_HW_FX2LAFW
 153 extern SR_PRIV struct sr_dev_driver fx2lafw_driver_info;
 154 #endif
 155 #ifdef HAVE_HW_HANTEK_DSO
 156 extern SR_PRIV struct sr_dev_driver hantek_dso_driver_info;
 157 #endif
 158 #ifdef HAVE_HW_AGILENT_DMM
 159 extern SR_PRIV struct sr_dev_driver agdmm_driver_info;
 160 #endif
 161 #ifdef HAVE_HW_FLUKE_DMM
 162 extern SR_PRIV struct sr_dev_driver flukedmm_driver_info;
 163 #endif
 164 #ifdef HAVE_HW_SERIAL_DMM
 165 extern SR_PRIV struct sr_dev_driver digitek_dt4000zc_driver_info;
 166 extern SR_PRIV struct sr_dev_driver tekpower_tp4000zc_driver_info;
 167 extern SR_PRIV struct sr_dev_driver metex_me31_driver_info;
 168 extern SR_PRIV struct sr_dev_driver peaktech_3410_driver_info;
 169 extern SR_PRIV struct sr_dev_driver mastech_mas345_driver_info;
 170 extern SR_PRIV struct sr_dev_driver va_va18b_driver_info;
 171 extern SR_PRIV struct sr_dev_driver metex_m3640d_driver_info;
 172 extern SR_PRIV struct sr_dev_driver peaktech_4370_driver_info;
 173 extern SR_PRIV struct sr_dev_driver pce_pce_dm32_driver_info;
 174 extern SR_PRIV struct sr_dev_driver radioshack_22_168_driver_info;
 175 extern SR_PRIV struct sr_dev_driver radioshack_22_805_driver_info;
 176 extern SR_PRIV struct sr_dev_driver radioshack_22_812_driver_info;
 177 extern SR_PRIV struct sr_dev_driver tecpel_dmm_8060_ser_driver_info;
 178 extern SR_PRIV struct sr_dev_driver tecpel_dmm_8061_ser_driver_info;
 179 extern SR_PRIV struct sr_dev_driver voltcraft_m3650d_driver_info;
 180 extern SR_PRIV struct sr_dev_driver voltcraft_vc820_ser_driver_info;
 181 extern SR_PRIV struct sr_dev_driver voltcraft_vc840_ser_driver_info;
 182 extern SR_PRIV struct sr_dev_driver uni_t_ut61d_ser_driver_info;
 183 extern SR_PRIV struct sr_dev_driver uni_t_ut61e_ser_driver_info;
 184 #endif
 185 #ifdef HAVE_HW_UNI_T_DMM
 186 extern SR_PRIV struct sr_dev_driver tecpel_dmm_8060_driver_info;
 187 extern SR_PRIV struct sr_dev_driver tecpel_dmm_8061_driver_info;
 188 extern SR_PRIV struct sr_dev_driver uni_t_ut61d_driver_info;
 189 extern SR_PRIV struct sr_dev_driver uni_t_ut61e_driver_info;
 190 extern SR_PRIV struct sr_dev_driver voltcraft_vc820_driver_info;
 191 extern SR_PRIV struct sr_dev_driver voltcraft_vc840_driver_info;
 192 #endif
 193 /** @endcond */
 194
 195 static struct sr_dev_driver *drivers_list[] = {
 196 #ifdef HAVE_HW_BRYMEN_DMM
 197         &brymen_bm857_driver_info,
 198 #endif
 199 #ifdef HAVE_HW_CEM_DT_885X
 200         &cem_dt_885x_driver_info,
 201 #endif
 202 #ifdef HAVE_HW_COLEAD_SLM
 203         &colead_slm_driver_info,
 204 #endif
 205 #ifdef HAVE_HW_DEMO
 206         &demo_driver_info,
 207 #endif
 208 #ifdef HAVE_HW_IKALOGIC_SCANALOGIC2
 209         &ikalogic_scanalogic2_driver_info,
 210 #endif
 211 #ifdef HAVE_HW_LASCAR_EL_USB
 212         &lascar_el_usb_driver_info,
 213 #endif
 214 #ifdef HAVE_HW_MIC_985XX
 215         &mic_98581_driver_info,
 216         &mic_98583_driver_info,
 217 #endif
 218 #ifdef HAVE_HW_NEXUS_OSCIPRIME
 219         &nexus_osciprime_driver_info,
 220 #endif
 221 #ifdef HAVE_HW_OLS
 222         &ols_driver_info,
 223 #endif
 224 #ifdef HAVE_HW_RIGOL_DS1XX2
 225         &rigol_ds1xx2_driver_info,
 226 #endif
 227 #ifdef HAVE_HW_TONDAJ_SL_814
 228         &tondaj_sl_814_driver_info,
 229 #endif
 230 #ifdef HAVE_HW_VICTOR_DMM
 231         &victor_dmm_driver_info,
 232 #endif
 233 #ifdef HAVE_HW_ZEROPLUS_LOGIC_CUBE
 234         &zeroplus_logic_cube_driver_info,
 235 #endif
 236 #ifdef HAVE_HW_ASIX_SIGMA
 237         &asix_sigma_driver_info,
 238 #endif
 239 #ifdef HAVE_HW_CHRONOVU_LA8
 240         &chronovu_la8_driver_info,
 241 #endif
 242 #ifdef HAVE_HW_LINK_MSO19
 243         &link_mso19_driver_info,
 244 #endif
 245 #ifdef HAVE_HW_ALSA
 246         &alsa_driver_info,
 247 #endif
 248 #ifdef HAVE_HW_FX2LAFW
 249         &fx2lafw_driver_info,
 250 #endif
 251 #ifdef HAVE_HW_HANTEK_DSO
 252         &hantek_dso_driver_info,
 253 #endif
 254 #ifdef HAVE_HW_AGILENT_DMM
 255         &agdmm_driver_info,
 256 #endif
 257 #ifdef HAVE_HW_FLUKE_DMM
 258         &flukedmm_driver_info,
 259 #endif
 260 #ifdef HAVE_HW_SERIAL_DMM
 261         &digitek_dt4000zc_driver_info,
 262         &tekpower_tp4000zc_driver_info,
 263         &metex_me31_driver_info,
 264         &peaktech_3410_driver_info,
 265         &mastech_mas345_driver_info,
 266         &va_va18b_driver_info,
 267         &metex_m3640d_driver_info,
 268         &peaktech_4370_driver_info,
 269         &pce_pce_dm32_driver_info,
 270         &radioshack_22_168_driver_info,
 271         &radioshack_22_805_driver_info,
 272         &radioshack_22_812_driver_info,
 273         &tecpel_dmm_8060_ser_driver_info,
 274         &tecpel_dmm_8061_ser_driver_info,
 275         &voltcraft_m3650d_driver_info,
 276         &voltcraft_vc820_ser_driver_info,
 277         &voltcraft_vc840_ser_driver_info,
 278         &uni_t_ut61d_ser_driver_info,
 279         &uni_t_ut61e_ser_driver_info,
 280 #endif
 281 #ifdef HAVE_HW_UNI_T_DMM
 282         &tecpel_dmm_8060_driver_info,
 283         &tecpel_dmm_8061_driver_info,
 284         &uni_t_ut61d_driver_info,
 285         &uni_t_ut61e_driver_info,
 286         &voltcraft_vc820_driver_info,
 287         &voltcraft_vc840_driver_info,
 288 #endif
 289         NULL,
 290 };
 291
 292 /**
 293  * Return the list of supported hardware drivers.
 294  *
 295  * @return Pointer to the NULL-terminated list of hardware driver pointers.
 296  */
 297 SR_API struct sr_dev_driver **sr_driver_list(void)
 298 {
 299
 300         return drivers_list;
 301 }
 302
 303 /**
 304  * Initialize a hardware driver.
 305  *
 306  * This usually involves memory allocations and variable initializations
 307  * within the driver, but _not_ scanning for attached devices.
 308  * The API call sr_driver_scan() is used for that.
 309  *
 310  * @param ctx A libsigrok context object allocated by a previous call to
 311  *            sr_init(). Must not be NULL.
 312  * @param driver The driver to initialize. This must be a pointer to one of
 313  *               the entries returned by sr_driver_list(). Must not be NULL.
 314  *
 315  * @return SR_OK upon success, SR_ERR_ARG upon invalid parameters,
 316  *         SR_ERR_BUG upon internal errors, or another negative error code
 317  *         upon other errors.
 318  */
 319 SR_API int sr_driver_init(struct sr_context *ctx, struct sr_dev_driver *driver)
 320 {
 321         int ret;
 322
 323         if (!ctx) {
 324                 sr_err("Invalid libsigrok context, can't initialize.");
 325                 return SR_ERR_ARG;
 326         }
 327
 328         if (!driver) {
 329                 sr_err("Invalid driver, can't initialize.");
 330                 return SR_ERR_ARG;
 331         }
 332
 333         sr_spew("Initializing driver '%s'.", driver->name);
 334         if ((ret = driver->init(ctx)) < 0)
 335                 sr_err("Failed to initialize the driver: %d.", ret);
 336
 337         return ret;
 338 }
 339
 340 /**
 341  * Tell a hardware driver to scan for devices.
 342  *
 343  * In addition to the detection, the devices that are found are also
 344  * initialized automatically. On some devices, this involves a firmware upload,
 345  * or other such measures.
 346  *
 347  * The order in which the system is scanned for devices is not specified. The
 348  * caller should not assume or rely on any specific order.
 349  *
 350  * Before calling sr_driver_scan(), the user must have previously initialized
 351  * the driver by calling sr_driver_init().
 352  *
 353  * @param driver The driver that should scan. This must be a pointer to one of
 354  *               the entries returned by sr_driver_list(). Must not be NULL.
 355  * @param options A list of 'struct sr_hwopt' options to pass to the driver's
 356  *                scanner. Can be NULL/empty.
 357  *
 358  * @return A GSList * of 'struct sr_dev_inst', or NULL if no devices were
 359  *         found (or errors were encountered). This list must be freed by the
 360  *         caller using g_slist_free(), but without freeing the data pointed
 361  *         to in the list.
 362  */
 363 SR_API GSList *sr_driver_scan(struct sr_dev_driver *driver, GSList *options)
 364 {
 365         GSList *l;
 366
 367         if (!driver) {
 368                 sr_err("Invalid driver, can't scan for devices.");
 369                 return NULL;
 370         }
 371
 372         if (!driver->priv) {
 373                 sr_err("Driver not initialized, can't scan for devices.");
 374                 return NULL;
 375         }
 376
 377         l = driver->scan(options);
 378
 379         sr_spew("Scan of '%s' found %d devices.", driver->name,
 380                 g_slist_length(l));
 381
 382         return l;
 383 }
 384
 385 /** @private */
 386 SR_PRIV void sr_hw_cleanup_all(void)
 387 {
 388         int i;
 389         struct sr_dev_driver **drivers;
 390
 391         drivers = sr_driver_list();
 392         for (i = 0; drivers[i]; i++) {
 393                 if (drivers[i]->cleanup)
 394                         drivers[i]->cleanup();
 395         }
 396 }
 397
 398 /** A floating reference can be passed in for data. */
 399 SR_PRIV struct sr_config *sr_config_new(int key, GVariant *data)
 400 {
 401         struct sr_config *src;
 402
 403         if (!(src = g_try_malloc(sizeof(struct sr_config))))
 404                 return NULL;
 405         src->key = key;
 406         src->data = g_variant_ref_sink(data);
 407
 408         return src;
 409 }
 410
 411 SR_PRIV void sr_config_free(struct sr_config *src)
 412 {
 413
 414         if (!src || !src->data) {
 415                 sr_err("%s: invalid data!", __func__);
 416                 return;
 417         }
 418
 419         g_variant_unref(src->data);
 420         g_free(src);
 421
 422 }
 423
 424 /**
 425  * Returns information about the given driver or device instance.
 426  *
 427  * @param driver The sr_dev_driver struct to query.
 428  * @param key The configuration key (SR_CONF_*).
 429  * @param data Pointer to a GVariant where the value will be stored. Must
 430  *             not be NULL. The caller is given ownership of the GVariant
 431  *             and must thus decrease the refcount after use. However if
 432  *             this function returns an error code, the field should be
 433  *             considered unused, and should not be unreferenced.
 434  * @param sdi (optional) If the key is specific to a device, this must
 435  *            contain a pointer to the struct sr_dev_inst to be checked.
 436  *            Otherwise it must be NULL.
 437  *
 438  * @return SR_OK upon success or SR_ERR in case of error. Note SR_ERR_ARG
 439  *         may be returned by the driver indicating it doesn't know that key,
 440  *         but this is not to be flagged as an error by the caller; merely
 441  *         as an indication that it's not applicable.
 442  */
 443 SR_API int sr_config_get(const struct sr_dev_driver *driver, int key,
 444                 GVariant **data, const struct sr_dev_inst *sdi)
 445 {
 446         int ret;
 447
 448         if (!driver || !data)
 449                 return SR_ERR;
 450
 451         if (!driver->config_get)
 452                 return SR_ERR_ARG;
 453
 454         if ((ret = driver->config_get(key, data, sdi)) == SR_OK) {
 455                 /* Got a floating reference from the driver. Sink it here,
 456                  * caller will need to unref when done with it. */
 457                 g_variant_ref_sink(*data);
 458         }
 459
 460         return ret;
 461 }
 462
 463 /**
 464  * Set a configuration key in a device instance.
 465  *
 466  * @param sdi The device instance.
 467  * @param key The configuration key (SR_CONF_*).
 468  * @param data The new value for the key, as a GVariant with GVariantType
 469  *        appropriate to that key. A floating reference can be passed
 470  *        in; its refcount will be sunk and unreferenced after use.
 471  *
 472  * @return SR_OK upon success or SR_ERR in case of error. Note SR_ERR_ARG
 473  *         may be returned by the driver indicating it doesn't know that key,
 474  *         but this is not to be flagged as an error by the caller; merely
 475  *         as an indication that it's not applicable.
 476  */
 477 SR_API int sr_config_set(const struct sr_dev_inst *sdi, int key, GVariant *data)
 478 {
 479         int ret;
 480
 481         g_variant_ref_sink(data);
 482
 483         if (!sdi || !sdi->driver || !data)
 484                 ret = SR_ERR;
 485         else if (!sdi->driver->config_set)
 486                 ret = SR_ERR_ARG;
 487         else
 488                 ret = sdi->driver->config_set(key, data, sdi);
 489
 490         g_variant_unref(data);
 491
 492         return ret;
 493 }
 494
 495 /**
 496  * List all possible values for a configuration key.
 497  *
 498  * @param driver The sr_dev_driver struct to query.
 499  * @param key The configuration key (SR_CONF_*).
 500  * @param data A pointer to a GVariant where the list will be stored. The
 501  *             caller is given ownership of the GVariant and must thus
 502  *             unref the GVariant after use. However if this function
 503  *             returns an error code, the field should be considered
 504  *             unused, and should not be unreferenced.
 505  * @param sdi (optional) If the key is specific to a device, this must
 506  *            contain a pointer to the struct sr_dev_inst to be checked.
 507  *
 508  * @return SR_OK upon success or SR_ERR in case of error. Note SR_ERR_ARG
 509  *         may be returned by the driver indicating it doesn't know that key,
 510  *         but this is not to be flagged as an error by the caller; merely
 511  *         as an indication that it's not applicable.
 512  */
 513 SR_API int sr_config_list(const struct sr_dev_driver *driver, int key,
 514                 GVariant **data, const struct sr_dev_inst *sdi)
 515 {
 516         int ret;
 517
 518         if (!driver || !data)
 519                 ret = SR_ERR;
 520         else if (!driver->config_list)
 521                 ret = SR_ERR_ARG;
 522         else if ((ret = driver->config_list(key, data, sdi)) == SR_OK)
 523                 g_variant_ref_sink(*data);
 524
 525         return ret;
 526 }
 527
 528 /**
 529  * Get information about a configuration key.
 530  *
 531  * @param key The configuration key.
 532  *
 533  * @return A pointer to a struct sr_config_info, or NULL if the key
 534  *         was not found.
 535  */
 536 SR_API const struct sr_config_info *sr_config_info_get(int key)
 537 {
 538         int i;
 539
 540         for (i = 0; sr_config_info_data[i].key; i++) {
 541                 if (sr_config_info_data[i].key == key)
 542                         return &sr_config_info_data[i];
 543         }
 544
 545         return NULL;
 546 }
 547
 548 /**
 549  * Get information about an configuration key, by name.
 550  *
 551  * @param optname The configuration key.
 552  *
 553  * @return A pointer to a struct sr_config_info, or NULL if the key
 554  *         was not found.
 555  */
 556 SR_API const struct sr_config_info *sr_config_info_name_get(const char *optname)
 557 {
 558         int i;
 559
 560         for (i = 0; sr_config_info_data[i].key; i++) {
 561                 if (!strcmp(sr_config_info_data[i].id, optname))
 562                         return &sr_config_info_data[i];
 563         }
 564
 565         return NULL;
 566 }
 567
 568 /* Unnecessary level of indirection follows. */
 569
 570 /** @private */
 571 SR_PRIV int sr_source_remove(int fd)
 572 {
 573         return sr_session_source_remove(fd);
 574 }
 575
 576 /** @private */
 577 SR_PRIV int sr_source_add(int fd, int events, int timeout,
 578                           sr_receive_data_callback_t cb, void *cb_data)
 579 {
 580         return sr_session_source_add(fd, events, timeout, cb, cb_data);
 581 }
 582
 583 /** @} */