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curl/lib/strerror.c

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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2004, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "setup.h"
#include <curl/curl.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#ifdef USE_LIBIDN
#include <idna.h>
#endif
#include "strerror.h"
#define _MPRINTF_REPLACE /* use our functions only */
#include <curl/mprintf.h>
#ifdef HAVE_NO_STRERROR_R_DECL
#ifdef HAVE_POSIX_STRERROR_R
/* seen on AIX 5100-02 gcc 2.9 */
extern int strerror_r(int errnum, char *strerrbuf, size_t buflen);
#else
extern char *strerror_r(int errnum, char *buf, size_t buflen);
#endif
#endif
const char *
curl_easy_strerror(CURLcode error)
{
#ifndef CURL_DISABLE_VERBOSE_STRINGS
switch (error) {
case CURLE_OK:
return "no error";
case CURLE_UNSUPPORTED_PROTOCOL:
return "unsupported protocol";
case CURLE_FAILED_INIT:
return "failed init";
case CURLE_URL_MALFORMAT:
return "URL using bad/illegal format or missing URL";
case CURLE_COULDNT_RESOLVE_PROXY:
return "couldnt resolve proxy name";
case CURLE_COULDNT_RESOLVE_HOST:
return "couldnt resolve host name";
case CURLE_COULDNT_CONNECT:
return "couldn't connect to server";
case CURLE_FTP_WEIRD_SERVER_REPLY:
return "FTP: weird server reply";
case CURLE_FTP_ACCESS_DENIED:
return "FTP: access denied";
case CURLE_FTP_USER_PASSWORD_INCORRECT:
return "FTP: user and/or password incorrect";
case CURLE_FTP_WEIRD_PASS_REPLY:
return "FTP: unknown PASS reply";
case CURLE_FTP_WEIRD_USER_REPLY:
return "FTP: unknown USER reply";
case CURLE_FTP_WEIRD_PASV_REPLY:
return "FTP: unknown PASV reply";
case CURLE_FTP_WEIRD_227_FORMAT:
return "FTP: unknown 227 response format";
case CURLE_FTP_CANT_GET_HOST:
return "FTP: can't figure out the host in the PASV response";
case CURLE_FTP_CANT_RECONNECT:
return "FTP: can't connect to server the response code is unknown";
case CURLE_FTP_COULDNT_SET_BINARY:
return "FTP: couldn't set binary mode";
case CURLE_PARTIAL_FILE:
return "Transferred a partial file";
case CURLE_FTP_COULDNT_RETR_FILE:
return "FTP: couldn't retrieve (RETR failed) the specified file";
case CURLE_FTP_WRITE_ERROR:
return "FTP: the post-transfer acknowledge response was not OK";
case CURLE_FTP_QUOTE_ERROR:
return "FTP: a quote command returned error";
case CURLE_HTTP_RETURNED_ERROR:
return "HTTP response code said error";
case CURLE_WRITE_ERROR:
return "failed writing received data to disk/application";
case CURLE_FTP_COULDNT_STOR_FILE:
return "failed FTP upload (the STOR command)";
case CURLE_READ_ERROR:
return "failed to open/read local data from file/application";
case CURLE_OUT_OF_MEMORY:
return "out of memory";
case CURLE_OPERATION_TIMEOUTED:
return "a timeout was reached";
case CURLE_FTP_COULDNT_SET_ASCII:
return "FTP could not set ASCII mode (TYPE A)";
case CURLE_FTP_PORT_FAILED:
return "FTP command PORT failed";
case CURLE_FTP_COULDNT_USE_REST:
return "FTP command REST failed";
case CURLE_FTP_COULDNT_GET_SIZE:
return "FTP command SIZE failed";
case CURLE_HTTP_RANGE_ERROR:
return "a range was requested but the server did not deliver it";
case CURLE_HTTP_POST_ERROR:
return "internal problem setting up the POST";
case CURLE_SSL_CONNECT_ERROR:
return "SSL connect error";
case CURLE_FTP_BAD_DOWNLOAD_RESUME:
return "couldn't resume FTP download";
case CURLE_FILE_COULDNT_READ_FILE:
return "couldn't read a file:// file";
case CURLE_LDAP_CANNOT_BIND:
return "LDAP: cannot bind";
case CURLE_LDAP_SEARCH_FAILED:
return "LDAP: search failed";
case CURLE_LIBRARY_NOT_FOUND:
return "a required shared library was not found";
case CURLE_FUNCTION_NOT_FOUND:
return "a required function in the shared library was not found";
case CURLE_ABORTED_BY_CALLBACK:
return "the operation was aborted by an application callback";
case CURLE_BAD_FUNCTION_ARGUMENT:
return "a libcurl function was given a bad argument";
case CURLE_INTERFACE_FAILED:
return "failed binding local connection end";
case CURLE_TOO_MANY_REDIRECTS :
return "number of redirects hit maximum amount";
case CURLE_UNKNOWN_TELNET_OPTION:
return "User specified an unknown option";
case CURLE_TELNET_OPTION_SYNTAX :
return "Malformed telnet option";
case CURLE_SSL_PEER_CERTIFICATE:
return "SSL peer certificate was not ok";
case CURLE_GOT_NOTHING:
return "server returned nothing (no headers, no data)";
case CURLE_SSL_ENGINE_NOTFOUND:
return "SSL crypto engine not found";
case CURLE_SSL_ENGINE_SETFAILED:
return "can not set SSL crypto engine as default";
case CURLE_SEND_ERROR:
return "failed sending data to the peer";
case CURLE_RECV_ERROR:
return "failure when receiving data from the peer";
case CURLE_SHARE_IN_USE:
return "share is already in use";
case CURLE_SSL_CERTPROBLEM:
return "problem with the local SSL certificate";
case CURLE_SSL_CIPHER:
return "couldn't use specified SSL cipher";
case CURLE_SSL_CACERT:
return "problem with the SSL CA cert (path? access rights?)";
case CURLE_BAD_CONTENT_ENCODING:
return "Unrecognized HTTP Content-Encoding";
case CURLE_LDAP_INVALID_URL:
return "Invalid LDAP URL";
case CURLE_FILESIZE_EXCEEDED:
return "Maximum file size exceeded";
case CURLE_FTP_SSL_FAILED:
return "Requested FTP SSL level failed";
case CURLE_URL_MALFORMAT_USER: /* not used by current libcurl */
case CURLE_MALFORMAT_USER: /* not used by current libcurl */
case CURLE_BAD_CALLING_ORDER: /* not used by current libcurl */
case CURLE_BAD_PASSWORD_ENTERED:/* not used by current libcurl */
case CURLE_OBSOLETE: /* not used by current libcurl */
case CURL_LAST:
break;
}
/*
* By using a switch, gcc -Wall will complain about enum values
* which do not appear, helping keep this function up-to-date.
* By using gcc -Wall -Werror, you can't forget.
*
* A table would not have the same benefit. Most compilers will
* generate code very similar to a table in any case, so there
* is little performance gain from a table. And something is broken
* for the user's application, anyways, so does it matter how fast
* it _doesn't_ work?
*
* The line number for the error will be near this comment, which
* is why it is here, and not at the start of the switch.
*/
return "unknown error";
#else
if (error == CURLE_OK)
return "no error";
else
return "error";
#endif
}
const char *
curl_multi_strerror(CURLMcode error)
{
#ifndef CURL_DISABLE_VERBOSE_STRINGS
switch (error) {
case CURLM_CALL_MULTI_PERFORM:
return "please call curl_multi_perform() soon";
case CURLM_OK:
return "no error";
case CURLM_BAD_HANDLE:
return "invalid multi handle";
case CURLM_BAD_EASY_HANDLE:
return "invalid easy handle";
case CURLM_OUT_OF_MEMORY:
return "out of memory";
case CURLM_INTERNAL_ERROR:
return "internal error";
case CURLM_LAST:
break;
}
return "unknown error";
#else
if (error == CURLM_OK)
return "no error";
else
return "error";
#endif
}
const char *
curl_share_strerror(CURLSHcode error)
{
#ifndef CURL_DISABLE_VERBOSE_STRINGS
switch (error) {
case CURLSHE_OK:
return "no error";
case CURLSHE_BAD_OPTION:
return "unknown share option";
case CURLSHE_IN_USE:
return "share currently in use";
case CURLSHE_INVALID:
return "invalid share handle";
case CURLSHE_NOMEM:
return "out of memory";
case CURLSHE_LAST:
break;
}
return "CURLSH unknown";
#else
if (error == CURLSHE_OK)
return "no error";
else
return "error";
#endif
}
#if defined(WIN32) && !defined(__CYGWIN__)
/* This function handles most / all (?) Winsock errors cURL is able to produce.
*/
static const char *
get_winsock_error (int err, char *buf, size_t len)
{
char *p;
#ifndef CURL_DISABLE_VERBOSE_STRINGS
switch (err) {
case WSAEINTR:
p = "Call interrupted.";
break;
case WSAEBADF:
p = "Bad file";
break;
case WSAEACCES:
p = "Bad access";
break;
case WSAEFAULT:
p = "Bad argument";
break;
case WSAEINVAL:
p = "Invalid arguments";
break;
case WSAEMFILE:
p = "Out of file descriptors";
break;
case WSAEWOULDBLOCK:
p = "Call would block";
break;
case WSAEINPROGRESS:
case WSAEALREADY:
p = "Blocking call in progress";
break;
case WSAENOTSOCK:
p = "Descriptor is not a socket.";
break;
case WSAEDESTADDRREQ:
p = "Need destination address";
break;
case WSAEMSGSIZE:
p = "Bad message size";
break;
case WSAEPROTOTYPE:
p = "Bad protocol";
break;
case WSAENOPROTOOPT:
p = "Protocol option is unsupported";
break;
case WSAEPROTONOSUPPORT:
p = "Protocol is unsupported";
break;
case WSAESOCKTNOSUPPORT:
p = "Socket is unsupported";
break;
case WSAEOPNOTSUPP:
p = "Operation not supported";
break;
case WSAEAFNOSUPPORT:
p = "Address family not supported";
break;
case WSAEPFNOSUPPORT:
p = "Protocol family not supported";
break;
case WSAEADDRINUSE:
p = "Address already in use";
break;
case WSAEADDRNOTAVAIL:
p = "Address not available";
break;
case WSAENETDOWN:
p = "Network down";
break;
case WSAENETUNREACH:
p = "Network unreachable";
break;
case WSAENETRESET:
p = "Network has been reset";
break;
case WSAECONNABORTED:
p = "Connection was aborted";
break;
case WSAECONNRESET:
p = "Connection was reset";
break;
case WSAENOBUFS:
p = "No buffer space";
break;
case WSAEISCONN:
p = "Socket is already connected";
break;
case WSAENOTCONN:
p = "Socket is not connected";
break;
case WSAESHUTDOWN:
p = "Socket has been shut down";
break;
case WSAETOOMANYREFS:
p = "Too many references";
break;
case WSAETIMEDOUT:
p = "Timed out";
break;
case WSAECONNREFUSED:
p = "Connection refused";
break;
case WSAELOOP:
p = "Loop??";
break;
case WSAENAMETOOLONG:
p = "Name too long";
break;
case WSAEHOSTDOWN:
p = "Host down";
break;
case WSAEHOSTUNREACH:
p = "Host unreachable";
break;
case WSAENOTEMPTY:
p = "Not empty";
break;
case WSAEPROCLIM:
p = "Process limit reached";
break;
case WSAEUSERS:
p = "Too many users";
break;
case WSAEDQUOT:
p = "Bad quota";
break;
case WSAESTALE:
p = "Something is stale";
break;
case WSAEREMOTE:
p = "Remote error";
break;
case WSAEDISCON:
p = "Disconnected";
break;
/* Extended Winsock errors */
case WSASYSNOTREADY:
p = "Winsock library is not ready";
break;
case WSANOTINITIALISED:
p = "Winsock library not initalised";
break;
case WSAVERNOTSUPPORTED:
p = "Winsock version not supported.";
break;
/* getXbyY() errors (already handled in herrmsg):
* Authoritative Answer: Host not found */
case WSAHOST_NOT_FOUND:
p = "Host not found";
break;
/* Non-Authoritative: Host not found, or SERVERFAIL */
case WSATRY_AGAIN:
p = "Host not found, try again";
break;
/* Non recoverable errors, FORMERR, REFUSED, NOTIMP */
case WSANO_RECOVERY:
p = "Unrecoverable error in call to nameserver";
break;
/* Valid name, no data record of requested type */
case WSANO_DATA:
p = "No data record of requested type";
break;
default:
return NULL;
}
#else
if (error == CURLE_OK)
return NULL;
else
p = "error";
#endif
strncpy (buf, p, len);
buf [len-1] = '\0';
return buf;
}
#endif /* WIN32 && !__CYGWIN__ */
/*
* Our thread-safe and smart strerror() replacement.
*
* The 'err' argument passed in to this function MUST be a true errno number
* as reported on this system. We do no range checking on the number before
* we pass it to the "number-to-message" convertion function and there might
* be systems that don't do proper range checking in there themselves.
*
* We don't do range checking (on systems other than Windows) since there is
* no good reliable and portable way to do it.
*/
const char *Curl_strerror(struct connectdata *conn, int err)
{
char *buf, *p;
size_t max;
curlassert(conn);
curlassert(err >= 0);
buf = conn->syserr_buf;
max = sizeof(conn->syserr_buf)-1;
*buf = '\0';
#if defined(WIN32) && !defined(__CYGWIN__)
#if _WIN32_WCE
buf[0]=0;
{
wchar_t wbuf[256];
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, err,
LANG_NEUTRAL, wbuf, sizeof(wbuf)/sizeof(wchar_t), NULL);
wcstombs(buf,wbuf,max);
}
#else
/* 'sys_nerr' is the maximum errno number, it is not widely portable */
if (err >= 0 && err < sys_nerr)
strncpy(buf, strerror(err), max);
else {
if (!get_winsock_error(err, buf, max) &&
!FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, err,
LANG_NEUTRAL, buf, max, NULL))
snprintf(buf, max, "Unknown error %d (%#x)", err, err);
}
#endif
#else /* not native Windows coming up */
/* These should be atomic and hopefully thread-safe */
#ifdef HAVE_STRERROR_R
/* There are two different APIs for strerror_r(). The POSIX and the GLIBC
versions. */
#ifdef HAVE_POSIX_STRERROR_R
strerror_r(err, buf, max);
/* this may set errno to ERANGE if insufficient storage was supplied via
'strerrbuf' and 'buflen' to contain the generated message string, or
EINVAL if the value of 'errnum' is not a valid error number.*/
#else
{
/* HAVE_GLIBC_STRERROR_R */
char buffer[256];
char *msg = strerror_r(err, buffer, sizeof(buffer));
/* this version of strerror_r() only *might* use the buffer we pass to
the function, but it always returns the error message as a pointer,
so we must copy that string unconditionally */
strncpy(buf, msg, max);
}
#endif /* end of HAVE_GLIBC_STRERROR_R */
#else /* HAVE_STRERROR_R */
strncpy(buf, strerror(err), max);
#endif /* end of HAVE_STRERROR_R */
#endif /* end of ! Windows */
buf[max] = '\0'; /* make sure the string is zero terminated */
/* strip trailing '\r\n' or '\n'. */
if ((p = strrchr(buf,'\n')) != NULL && (p - buf) >= 2)
*p = '\0';
if ((p = strrchr(buf,'\r')) != NULL && (p - buf) >= 1)
*p = '\0';
return buf;
}
#ifdef USE_LIBIDN
/*
* Return error-string for libidn status as returned from idna_to_ascii_lz().
*/
const char *Curl_idn_strerror (struct connectdata *conn, int err)
{
#ifdef HAVE_IDNA_STRERROR
(void)conn;
return idna_strerror((Idna_rc) err);
#else
const char *str;
char *buf;
size_t max;
curlassert(conn);
buf = conn->syserr_buf;
max = sizeof(conn->syserr_buf)-1;
#ifndef CURL_DISABLE_VERBOSE_STRINGS
switch ((Idna_rc)err) {
case IDNA_SUCCESS:
str = "No error";
break;
case IDNA_STRINGPREP_ERROR:
str = "Error in string preparation";
break;
case IDNA_PUNYCODE_ERROR:
str = "Error in Punycode operation";
break;
case IDNA_CONTAINS_NON_LDH:
str = "Illegal ASCII characters";
break;
case IDNA_CONTAINS_MINUS:
str = "Contains minus";
break;
case IDNA_INVALID_LENGTH:
str = "Invalid output length";
break;
case IDNA_NO_ACE_PREFIX:
str = "No ACE prefix (\"xn--\")";
break;
case IDNA_ROUNDTRIP_VERIFY_ERROR:
str = "Roundtrip verify error";
break;
case IDNA_CONTAINS_ACE_PREFIX:
str = "Already have ACE prefix (\"xn--\")";
break;
case IDNA_ICONV_ERROR:
str = "Locale conversion failed";
break;
case IDNA_MALLOC_ERROR:
str = "Allocation failed";
break;
case IDNA_DLOPEN_ERROR:
str = "dlopen() error";
break;
default:
snprintf(buf, max, "error %d", (int)err);
str = NULL;
break;
}
#else
if ((Idna_rc)err == IDNA_SUCCESS)
str = "No error";
else
str = "error";
#endif
if (str)
strncpy(buf, str, max);
buf[max] = '\0';
return (buf);
#endif
}
#endif /* USE_LIBIDN */
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