text: /**
   * @file
   * Error Management module
   *
   */
  
  /*
   * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without modification,
   * are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice,
   *    this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   * 3. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
   * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
   * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
   * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
   * OF SUCH DAMAGE.
   *
   * This file is part of the lwIP TCP/IP stack.
   *
   * Author: Adam Dunkels <adam@sics.se>
   *
   */
  
  #include "lwip/err.h"
  #include "lwip/def.h"
  #include "lwip/sys.h"
  
  #include "lwip/errno.h"
  
  #if !NO_SYS
  /** Table to quickly map an lwIP error (err_t) to a socket error
    * by using -err as an index */
  static const int err_to_errno_table[] = {
    0,             /* ERR_OK          0      No error, everything OK. */
    ENOMEM,        /* ERR_MEM        -1      Out of memory error.     */
    ENOBUFS,       /* ERR_BUF        -2      Buffer error.            */
    EWOULDBLOCK,   /* ERR_TIMEOUT    -3      Timeout                  */
    EHOSTUNREACH,  /* ERR_RTE        -4      Routing problem.         */
    EINPROGRESS,   /* ERR_INPROGRESS -5      Operation in progress    */
    EINVAL,        /* ERR_VAL        -6      Illegal value.           */
    EWOULDBLOCK,   /* ERR_WOULDBLOCK -7      Operation would block.   */
    EADDRINUSE,    /* ERR_USE        -8      Address in use.          */
    EALREADY,      /* ERR_ALREADY    -9      Already connecting.      */
    EISCONN,       /* ERR_ISCONN     -10     Conn already established.*/
    ENOTCONN,      /* ERR_CONN       -11     Not connected.           */
    -1,            /* ERR_IF         -12     Low-level netif error    */
    ECONNABORTED,  /* ERR_ABRT       -13     Connection aborted.      */
    ECONNRESET,    /* ERR_RST        -14     Connection reset.        */
    ENOTCONN,      /* ERR_CLSD       -15     Connection closed.       */
    EIO            /* ERR_ARG        -16     Illegal argument.        */
  };
  
  int
  err_to_errno(err_t err)
  {
    if ((err > 0) || (-err >= (err_t)LWIP_ARRAYSIZE(err_to_errno_table))) {
      return EIO;
    }
    return err_to_errno_table[-err];
  }
  #endif /* !NO_SYS */
  
  #if 1 //def LWIP_DEBUG
  
  static const char *err_strerr[] = {
    "Ok.",                    /* ERR_OK          0  */
    "Out of memory error.",   /* ERR_MEM        -1  */
    "Buffer error.",          /* ERR_BUF        -2  */
    "Timeout.",               /* ERR_TIMEOUT    -3  */
    "Routing problem.",       /* ERR_RTE        -4  */
    "Operation in progress.", /* ERR_INPROGRESS -5  */
    "Illegal value.",         /* ERR_VAL        -6  */
    "Operation would block.", /* ERR_WOULDBLOCK -7  */
    "Address in use.",        /* ERR_USE        -8  */
    "Already connecting.",    /* ERR_ALREADY    -9  */
    "Already connected.",     /* ERR_ISCONN     -10 */
    "Not connected.",         /* ERR_CONN       -11 */
    "Low-level netif error.", /* ERR_IF         -12 */
    "Connection aborted.",    /* ERR_ABRT       -13 */
    "Connection reset.",      /* ERR_RST        -14 */
    "Connection closed.",     /* ERR_CLSD       -15 */
    "Illegal argument."       /* ERR_ARG        -16 */
  };
  
  /**
   * Convert an lwip internal error to a string representation.
   *
   * @param err an lwip internal err_t
   * @return a string representation for err
   */
  const char *
  lwip_strerr(err_t err)
  {
    if ((err > 0) || (-err >= (err_t)LWIP_ARRAYSIZE(err_strerr))) {
      return "Unknown error.";
    }
    return err_strerr[-err];
  }
  
  #endif /* LWIP_DEBUG */
  