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         {0, 0, NULL, NULL, NULL},
  95 };
  96
  97 /** @cond PRIVATE */
  98 #ifdef HAVE_HW_BRYMEN_DMM
  99 extern SR_PRIV struct sr_dev_driver brymen_bm857_driver_info;
 100 #endif
 101 #ifdef HAVE_HW_CEM_DT_885X
 102 extern SR_PRIV struct sr_dev_driver cem_dt_885x_driver_info;
 103 #endif
 104 #ifdef HAVE_HW_COLEAD_SLM
 105 extern SR_PRIV struct sr_dev_driver colead_slm_driver_info;
 106 #endif
 107 #ifdef HAVE_HW_DEMO
 108 extern SR_PRIV struct sr_dev_driver demo_driver_info;
 109 #endif
 110 #ifdef HAVE_HW_IKALOGIC_SCANALOGIC2
 111 extern SR_PRIV struct sr_dev_driver ikalogic_scanalogic2_driver_info;
 112 #endif
 113 #ifdef HAVE_HW_LASCAR_EL_USB
 114 extern SR_PRIV struct sr_dev_driver lascar_el_usb_driver_info;
 115 #endif
 116 #ifdef HAVE_HW_MIC_985XX
 117 extern SR_PRIV struct sr_dev_driver mic_98581_driver_info;
 118 extern SR_PRIV struct sr_dev_driver mic_98583_driver_info;
 119 #endif
 120 #ifdef HAVE_HW_NEXUS_OSCIPRIME
 121 extern SR_PRIV struct sr_dev_driver nexus_osciprime_driver_info;
 122 #endif
 123 #ifdef HAVE_HW_OLS
 124 extern SR_PRIV struct sr_dev_driver ols_driver_info;
 125 #endif
 126 #ifdef HAVE_HW_RIGOL_DS1XX2
 127 extern SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info;
 128 #endif
 129 #ifdef HAVE_HW_TONDAJ_SL_814
 130 extern SR_PRIV struct sr_dev_driver tondaj_sl_814_driver_info;
 131 #endif
 132 #ifdef HAVE_HW_VICTOR_DMM
 133 extern SR_PRIV struct sr_dev_driver victor_dmm_driver_info;
 134 #endif
 135 #ifdef HAVE_HW_ZEROPLUS_LOGIC_CUBE
 136 extern SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info;
 137 #endif
 138 #ifdef HAVE_HW_ASIX_SIGMA
 139 extern SR_PRIV struct sr_dev_driver asix_sigma_driver_info;
 140 #endif
 141 #ifdef HAVE_HW_CHRONOVU_LA8
 142 extern SR_PRIV struct sr_dev_driver chronovu_la8_driver_info;
 143 #endif
 144 #ifdef HAVE_HW_LINK_MSO19
 145 extern SR_PRIV struct sr_dev_driver link_mso19_driver_info;
 146 #endif
 147 #ifdef HAVE_HW_ALSA
 148 extern SR_PRIV struct sr_dev_driver alsa_driver_info;
 149 #endif
 150 #ifdef HAVE_HW_FX2LAFW
 151 extern SR_PRIV struct sr_dev_driver fx2lafw_driver_info;
 152 #endif
 153 #ifdef HAVE_HW_HANTEK_DSO
 154 extern SR_PRIV struct sr_dev_driver hantek_dso_driver_info;
 155 #endif
 156 #ifdef HAVE_HW_AGILENT_DMM
 157 extern SR_PRIV struct sr_dev_driver agdmm_driver_info;
 158 #endif
 159 #ifdef HAVE_HW_FLUKE_DMM
 160 extern SR_PRIV struct sr_dev_driver flukedmm_driver_info;
 161 #endif
 162 #ifdef HAVE_HW_SERIAL_DMM
 163 extern SR_PRIV struct sr_dev_driver digitek_dt4000zc_driver_info;
 164 extern SR_PRIV struct sr_dev_driver tekpower_tp4000zc_driver_info;
 165 extern SR_PRIV struct sr_dev_driver metex_me31_driver_info;
 166 extern SR_PRIV struct sr_dev_driver peaktech_3410_driver_info;
 167 extern SR_PRIV struct sr_dev_driver mastech_mas345_driver_info;
 168 extern SR_PRIV struct sr_dev_driver va_va18b_driver_info;
 169 extern SR_PRIV struct sr_dev_driver metex_m3640d_driver_info;
 170 extern SR_PRIV struct sr_dev_driver peaktech_4370_driver_info;
 171 extern SR_PRIV struct sr_dev_driver pce_pce_dm32_driver_info;
 172 extern SR_PRIV struct sr_dev_driver radioshack_22_168_driver_info;
 173 extern SR_PRIV struct sr_dev_driver radioshack_22_805_driver_info;
 174 extern SR_PRIV struct sr_dev_driver radioshack_22_812_driver_info;
 175 extern SR_PRIV struct sr_dev_driver tecpel_dmm_8060_ser_driver_info;
 176 extern SR_PRIV struct sr_dev_driver tecpel_dmm_8061_ser_driver_info;
 177 extern SR_PRIV struct sr_dev_driver voltcraft_m3650d_driver_info;
 178 extern SR_PRIV struct sr_dev_driver voltcraft_vc820_ser_driver_info;
 179 extern SR_PRIV struct sr_dev_driver voltcraft_vc840_ser_driver_info;
 180 extern SR_PRIV struct sr_dev_driver uni_t_ut61d_ser_driver_info;
 181 extern SR_PRIV struct sr_dev_driver uni_t_ut61e_ser_driver_info;
 182 #endif
 183 #ifdef HAVE_HW_UNI_T_DMM
 184 extern SR_PRIV struct sr_dev_driver tecpel_dmm_8060_driver_info;
 185 extern SR_PRIV struct sr_dev_driver tecpel_dmm_8061_driver_info;
 186 extern SR_PRIV struct sr_dev_driver uni_t_ut61d_driver_info;
 187 extern SR_PRIV struct sr_dev_driver uni_t_ut61e_driver_info;
 188 extern SR_PRIV struct sr_dev_driver voltcraft_vc820_driver_info;
 189 extern SR_PRIV struct sr_dev_driver voltcraft_vc840_driver_info;
 190 #endif
 191 /** @endcond */
 192
 193 static struct sr_dev_driver *drivers_list[] = {
 194 #ifdef HAVE_HW_BRYMEN_DMM
 195         &brymen_bm857_driver_info,
 196 #endif
 197 #ifdef HAVE_HW_CEM_DT_885X
 198         &cem_dt_885x_driver_info,
 199 #endif
 200 #ifdef HAVE_HW_COLEAD_SLM
 201         &colead_slm_driver_info,
 202 #endif
 203 #ifdef HAVE_HW_DEMO
 204         &demo_driver_info,
 205 #endif
 206 #ifdef HAVE_HW_IKALOGIC_SCANALOGIC2
 207         &ikalogic_scanalogic2_driver_info,
 208 #endif
 209 #ifdef HAVE_HW_LASCAR_EL_USB
 210         &lascar_el_usb_driver_info,
 211 #endif
 212 #ifdef HAVE_HW_MIC_985XX
 213         &mic_98581_driver_info,
 214         &mic_98583_driver_info,
 215 #endif
 216 #ifdef HAVE_HW_NEXUS_OSCIPRIME
 217         &nexus_osciprime_driver_info,
 218 #endif
 219 #ifdef HAVE_HW_OLS
 220         &ols_driver_info,
 221 #endif
 222 #ifdef HAVE_HW_RIGOL_DS1XX2
 223         &rigol_ds1xx2_driver_info,
 224 #endif
 225 #ifdef HAVE_HW_TONDAJ_SL_814
 226         &tondaj_sl_814_driver_info,
 227 #endif
 228 #ifdef HAVE_HW_VICTOR_DMM
 229         &victor_dmm_driver_info,
 230 #endif
 231 #ifdef HAVE_HW_ZEROPLUS_LOGIC_CUBE
 232         &zeroplus_logic_cube_driver_info,
 233 #endif
 234 #ifdef HAVE_HW_ASIX_SIGMA
 235         &asix_sigma_driver_info,
 236 #endif
 237 #ifdef HAVE_HW_CHRONOVU_LA8
 238         &chronovu_la8_driver_info,
 239 #endif
 240 #ifdef HAVE_HW_LINK_MSO19
 241         &link_mso19_driver_info,
 242 #endif
 243 #ifdef HAVE_HW_ALSA
 244         &alsa_driver_info,
 245 #endif
 246 #ifdef HAVE_HW_FX2LAFW
 247         &fx2lafw_driver_info,
 248 #endif
 249 #ifdef HAVE_HW_HANTEK_DSO
 250         &hantek_dso_driver_info,
 251 #endif
 252 #ifdef HAVE_HW_AGILENT_DMM
 253         &agdmm_driver_info,
 254 #endif
 255 #ifdef HAVE_HW_FLUKE_DMM
 256         &flukedmm_driver_info,
 257 #endif
 258 #ifdef HAVE_HW_SERIAL_DMM
 259         &digitek_dt4000zc_driver_info,
 260         &tekpower_tp4000zc_driver_info,
 261         &metex_me31_driver_info,
 262         &peaktech_3410_driver_info,
 263         &mastech_mas345_driver_info,
 264         &va_va18b_driver_info,
 265         &metex_m3640d_driver_info,
 266         &peaktech_4370_driver_info,
 267         &pce_pce_dm32_driver_info,
 268         &radioshack_22_168_driver_info,
 269         &radioshack_22_805_driver_info,
 270         &radioshack_22_812_driver_info,
 271         &tecpel_dmm_8060_ser_driver_info,
 272         &tecpel_dmm_8061_ser_driver_info,
 273         &voltcraft_m3650d_driver_info,
 274         &voltcraft_vc820_ser_driver_info,
 275         &voltcraft_vc840_ser_driver_info,
 276         &uni_t_ut61d_ser_driver_info,
 277         &uni_t_ut61e_ser_driver_info,
 278 #endif
 279 #ifdef HAVE_HW_UNI_T_DMM
 280         &tecpel_dmm_8060_driver_info,
 281         &tecpel_dmm_8061_driver_info,
 282         &uni_t_ut61d_driver_info,
 283         &uni_t_ut61e_driver_info,
 284         &voltcraft_vc820_driver_info,
 285         &voltcraft_vc840_driver_info,
 286 #endif
 287         NULL,
 288 };
 289
 290 /**
 291  * Return the list of supported hardware drivers.
 292  *
 293  * @return Pointer to the NULL-terminated list of hardware driver pointers.
 294  */
 295 SR_API struct sr_dev_driver **sr_driver_list(void)
 296 {
 297
 298         return drivers_list;
 299 }
 300
 301 /**
 302  * Initialize a hardware driver.
 303  *
 304  * This usually involves memory allocations and variable initializations
 305  * within the driver, but _not_ scanning for attached devices.
 306  * The API call sr_driver_scan() is used for that.
 307  *
 308  * @param ctx A libsigrok context object allocated by a previous call to
 309  *            sr_init(). Must not be NULL.
 310  * @param driver The driver to initialize. This must be a pointer to one of
 311  *               the entries returned by sr_driver_list(). Must not be NULL.
 312  *
 313  * @return SR_OK upon success, SR_ERR_ARG upon invalid parameters,
 314  *         SR_ERR_BUG upon internal errors, or another negative error code
 315  *         upon other errors.
 316  */
 317 SR_API int sr_driver_init(struct sr_context *ctx, struct sr_dev_driver *driver)
 318 {
 319         int ret;
 320
 321         if (!ctx) {
 322                 sr_err("Invalid libsigrok context, can't initialize.");
 323                 return SR_ERR_ARG;
 324         }
 325
 326         if (!driver) {
 327                 sr_err("Invalid driver, can't initialize.");
 328                 return SR_ERR_ARG;
 329         }
 330
 331         sr_spew("Initializing driver '%s'.", driver->name);
 332         if ((ret = driver->init(ctx)) < 0)
 333                 sr_err("Failed to initialize the driver: %d.", ret);
 334
 335         return ret;
 336 }
 337
 338 /**
 339  * Tell a hardware driver to scan for devices.
 340  *
 341  * In addition to the detection, the devices that are found are also
 342  * initialized automatically. On some devices, this involves a firmware upload,
 343  * or other such measures.
 344  *
 345  * The order in which the system is scanned for devices is not specified. The
 346  * caller should not assume or rely on any specific order.
 347  *
 348  * Before calling sr_driver_scan(), the user must have previously initialized
 349  * the driver by calling sr_driver_init().
 350  *
 351  * @param driver The driver that should scan. This must be a pointer to one of
 352  *               the entries returned by sr_driver_list(). Must not be NULL.
 353  * @param options A list of 'struct sr_hwopt' options to pass to the driver's
 354  *                scanner. Can be NULL/empty.
 355  *
 356  * @return A GSList * of 'struct sr_dev_inst', or NULL if no devices were
 357  *         found (or errors were encountered). This list must be freed by the
 358  *         caller using g_slist_free(), but without freeing the data pointed
 359  *         to in the list.
 360  */
 361 SR_API GSList *sr_driver_scan(struct sr_dev_driver *driver, GSList *options)
 362 {
 363         GSList *l;
 364
 365         if (!driver) {
 366                 sr_err("Invalid driver, can't scan for devices.");
 367                 return NULL;
 368         }
 369
 370         if (!driver->priv) {
 371                 sr_err("Driver not initialized, can't scan for devices.");
 372                 return NULL;
 373         }
 374
 375         l = driver->scan(options);
 376
 377         sr_spew("Scan of '%s' found %d devices.", driver->name,
 378                 g_slist_length(l));
 379
 380         return l;
 381 }
 382
 383 /** @private */
 384 SR_PRIV void sr_hw_cleanup_all(void)
 385 {
 386         int i;
 387         struct sr_dev_driver **drivers;
 388
 389         drivers = sr_driver_list();
 390         for (i = 0; drivers[i]; i++) {
 391                 if (drivers[i]->cleanup)
 392                         drivers[i]->cleanup();
 393         }
 394 }
 395
 396 /** A floating reference can be passed in for data. */
 397 SR_PRIV struct sr_config *sr_config_new(int key, GVariant *data)
 398 {
 399         struct sr_config *src;
 400
 401         if (!(src = g_try_malloc(sizeof(struct sr_config))))
 402                 return NULL;
 403         src->key = key;
 404         src->data = g_variant_ref_sink(data);
 405
 406         return src;
 407 }
 408
 409 SR_PRIV void sr_config_free(struct sr_config *src)
 410 {
 411
 412         if (!src || !src->data) {
 413                 sr_err("%s: invalid data!", __func__);
 414                 return;
 415         }
 416
 417         g_variant_unref(src->data);
 418         g_free(src);
 419
 420 }
 421
 422 /**
 423  * Returns information about the given driver or device instance.
 424  *
 425  * @param driver The sr_dev_driver struct to query.
 426  * @param key The configuration key (SR_CONF_*).
 427  * @param data Pointer to a GVariant where the value will be stored. Must
 428  *             not be NULL. The caller is given ownership of the GVariant
 429  *             and must thus decrease the refcount after use. However if
 430  *             this function returns an error code, the field should be
 431  *             considered unused, and should not be unreferenced.
 432  * @param sdi (optional) If the key is specific to a device, this must
 433  *            contain a pointer to the struct sr_dev_inst to be checked.
 434  *            Otherwise it must be NULL.
 435  *
 436  * @return SR_OK upon success or SR_ERR in case of error. Note SR_ERR_ARG
 437  *         may be returned by the driver indicating it doesn't know that key,
 438  *         but this is not to be flagged as an error by the caller; merely
 439  *         as an indication that it's not applicable.
 440  */
 441 SR_API int sr_config_get(const struct sr_dev_driver *driver, int key,
 442                 GVariant **data, const struct sr_dev_inst *sdi)
 443 {
 444         int ret;
 445
 446         if (!driver || !data)
 447                 return SR_ERR;
 448
 449         if (!driver->config_get)
 450                 return SR_ERR_ARG;
 451
 452         if ((ret = driver->config_get(key, data, sdi)) == SR_OK) {
 453                 /* Got a floating reference from the driver. Sink it here,
 454                  * caller will need to unref when done with it. */
 455                 g_variant_ref_sink(*data);
 456         }
 457
 458         return ret;
 459 }
 460
 461 /**
 462  * Set a configuration key in a device instance.
 463  *
 464  * @param sdi The device instance.
 465  * @param key The configuration key (SR_CONF_*).
 466  * @param data The new value for the key, as a GVariant with GVariantType
 467  *        appropriate to that key. A floating reference can be passed
 468  *        in; its refcount will be sunk and unreferenced after use.
 469  *
 470  * @return SR_OK upon success or SR_ERR in case of error. Note SR_ERR_ARG
 471  *         may be returned by the driver indicating it doesn't know that key,
 472  *         but this is not to be flagged as an error by the caller; merely
 473  *         as an indication that it's not applicable.
 474  */
 475 SR_API int sr_config_set(const struct sr_dev_inst *sdi, int key, GVariant *data)
 476 {
 477         int ret;
 478
 479         g_variant_ref_sink(data);
 480
 481         if (!sdi || !sdi->driver || !data)
 482                 ret = SR_ERR;
 483         else if (!sdi->driver->config_set)
 484                 ret = SR_ERR_ARG;
 485         else
 486                 ret = sdi->driver->config_set(key, data, sdi);
 487
 488         g_variant_unref(data);
 489
 490         return ret;
 491 }
 492
 493 /**
 494  * List all possible values for a configuration key.
 495  *
 496  * @param driver The sr_dev_driver struct to query.
 497  * @param key The configuration key (SR_CONF_*).
 498  * @param data A pointer to a GVariant where the list will be stored. The
 499  *             caller is given ownership of the GVariant and must thus
 500  *             unref the GVariant after use. However if this function
 501  *             returns an error code, the field should be considered
 502  *             unused, and should not be unreferenced.
 503  * @param sdi (optional) If the key is specific to a device, this must
 504  *            contain a pointer to the struct sr_dev_inst to be checked.
 505  *
 506  * @return SR_OK upon success or SR_ERR in case of error. Note SR_ERR_ARG
 507  *         may be returned by the driver indicating it doesn't know that key,
 508  *         but this is not to be flagged as an error by the caller; merely
 509  *         as an indication that it's not applicable.
 510  */
 511 SR_API int sr_config_list(const struct sr_dev_driver *driver, int key,
 512                 GVariant **data, const struct sr_dev_inst *sdi)
 513 {
 514         int ret;
 515
 516         if (!driver || !data)
 517                 ret = SR_ERR;
 518         else if (!driver->config_list)
 519                 ret = SR_ERR_ARG;
 520         else if ((ret = driver->config_list(key, data, sdi)) == SR_OK)
 521                 g_variant_ref_sink(*data);
 522
 523         return ret;
 524 }
 525
 526 /**
 527  * Get information about a configuration key.
 528  *
 529  * @param key The configuration key.
 530  *
 531  * @return A pointer to a struct sr_config_info, or NULL if the key
 532  *         was not found.
 533  */
 534 SR_API const struct sr_config_info *sr_config_info_get(int key)
 535 {
 536         int i;
 537
 538         for (i = 0; sr_config_info_data[i].key; i++) {
 539                 if (sr_config_info_data[i].key == key)
 540                         return &sr_config_info_data[i];
 541         }
 542
 543         return NULL;
 544 }
 545
 546 /**
 547  * Get information about an configuration key, by name.
 548  *
 549  * @param optname The configuration key.
 550  *
 551  * @return A pointer to a struct sr_config_info, or NULL if the key
 552  *         was not found.
 553  */
 554 SR_API const struct sr_config_info *sr_config_info_name_get(const char *optname)
 555 {
 556         int i;
 557
 558         for (i = 0; sr_config_info_data[i].key; i++) {
 559                 if (!strcmp(sr_config_info_data[i].id, optname))
 560                         return &sr_config_info_data[i];
 561         }
 562
 563         return NULL;
 564 }
 565
 566 /* Unnecessary level of indirection follows. */
 567
 568 /** @private */
 569 SR_PRIV int sr_source_remove(int fd)
 570 {
 571         return sr_session_source_remove(fd);
 572 }
 573
 574 /** @private */
 575 SR_PRIV int sr_source_add(int fd, int events, int timeout,
 576                           sr_receive_data_callback_t cb, void *cb_data)
 577 {
 578         return sr_session_source_add(fd, events, timeout, cb, cb_data);
 579 }
 580
 581 /** @} */