1/**
2 * @file
3 * Error Management module
4 *
5 */
6
7/*
8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without modification,
12 * are permitted provided that the following conditions are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright notice,
15 *    this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright notice,
17 *    this list of conditions and the following disclaimer in the documentation
18 *    and/or other materials provided with the distribution.
19 * 3. The name of the author may not be used to endorse or promote products
20 *    derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
31 * OF SUCH DAMAGE.
32 *
33 * This file is part of the lwIP TCP/IP stack.
34 *
35 * Author: Adam Dunkels <adam@sics.se>
36 *
37 */
38
39#include "lwip/err.h"
40#include "lwip/def.h"
41#include "lwip/sys.h"
42
43#include "lwip/errno.h"
44
45#if !NO_SYS
46/** Table to quickly map an lwIP error (err_t) to a socket error
47  * by using -err as an index */
48static const int err_to_errno_table[] = {
49  0,             /* ERR_OK          0      No error, everything OK. */
50  ENOMEM,        /* ERR_MEM        -1      Out of memory error.     */
51  ENOBUFS,       /* ERR_BUF        -2      Buffer error.            */
52  EWOULDBLOCK,   /* ERR_TIMEOUT    -3      Timeout                  */
53  EHOSTUNREACH,  /* ERR_RTE        -4      Routing problem.         */
54  EINPROGRESS,   /* ERR_INPROGRESS -5      Operation in progress    */
55  EINVAL,        /* ERR_VAL        -6      Illegal value.           */
56  EWOULDBLOCK,   /* ERR_WOULDBLOCK -7      Operation would block.   */
57  EADDRINUSE,    /* ERR_USE        -8      Address in use.          */
58  EALREADY,      /* ERR_ALREADY    -9      Already connecting.      */
59  EISCONN,       /* ERR_ISCONN     -10     Conn already established.*/
60  ENOTCONN,      /* ERR_CONN       -11     Not connected.           */
61  -1,            /* ERR_IF         -12     Low-level netif error    */
62  ECONNABORTED,  /* ERR_ABRT       -13     Connection aborted.      */
63  ECONNRESET,    /* ERR_RST        -14     Connection reset.        */
64  ENOTCONN,      /* ERR_CLSD       -15     Connection closed.       */
65  EIO            /* ERR_ARG        -16     Illegal argument.        */
66};
67
68int
69err_to_errno(err_t err)
70{
71  if ((err > 0) || (-err >= (err_t)LWIP_ARRAYSIZE(err_to_errno_table))) {
72    return EIO;
73  }
74  return err_to_errno_table[-err];
75}
76#endif /* !NO_SYS */
77
78#ifdef LWIP_DEBUG
79
80static const char *err_strerr[] = {
81           "Ok.",                    /* ERR_OK          0  */
82           "Out of memory error.",   /* ERR_MEM        -1  */
83           "Buffer error.",          /* ERR_BUF        -2  */
84           "Timeout.",               /* ERR_TIMEOUT    -3  */
85           "Routing problem.",       /* ERR_RTE        -4  */
86           "Operation in progress.", /* ERR_INPROGRESS -5  */
87           "Illegal value.",         /* ERR_VAL        -6  */
88           "Operation would block.", /* ERR_WOULDBLOCK -7  */
89           "Address in use.",        /* ERR_USE        -8  */
90           "Already connecting.",    /* ERR_ALREADY    -9  */
91           "Already connected.",     /* ERR_ISCONN     -10 */
92           "Not connected.",         /* ERR_CONN       -11 */
93           "Low-level netif error.", /* ERR_IF         -12 */
94           "Connection aborted.",    /* ERR_ABRT       -13 */
95           "Connection reset.",      /* ERR_RST        -14 */
96           "Connection closed.",     /* ERR_CLSD       -15 */
97           "Illegal argument."       /* ERR_ARG        -16 */
98};
99
100/**
101 * Convert an lwip internal error to a string representation.
102 *
103 * @param err an lwip internal err_t
104 * @return a string representation for err
105 */
106const char *
107lwip_strerr(err_t err)
108{
109  if ((err > 0) || (-err >= (err_t)LWIP_ARRAYSIZE(err_strerr))) {
110    return "Unknown error.";
111  }
112  return err_strerr[-err];
113}
114
115#endif /* LWIP_DEBUG */
116