/*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 2004 - 2007, Daniel Stenberg, , 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. * * $Id: strerror.c,v 1.44 2007-05-08 11:34:31 bagder Exp $ ***************************************************************************/ #include "setup.h" #ifdef HAVE_STRERROR_R #if !defined(HAVE_POSIX_STRERROR_R) && !defined(HAVE_GLIBC_STRERROR_R) #error "you MUST have either POSIX or glibc strerror_r if strerror_r is found" #endif /* !POSIX && !glibc */ #endif /* HAVE_STRERROR_R */ #include #include #include #include #ifdef USE_LIBIDN #include #endif #include "strerror.h" #define _MPRINTF_REPLACE /* use our functions only */ #include #if defined(HAVE_STRERROR_R) && defined(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 "couldn't resolve proxy name"; case CURLE_COULDNT_RESOLVE_HOST: return "couldn't 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_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_UPLOAD_FAILED: return "upload failed (at start/before it took off)"; case CURLE_READ_ERROR: return "failed to open/read local data from file/application"; case CURLE_OUT_OF_MEMORY: #ifdef CURL_DOES_CONVERSIONS return "conversion failed -or- out of memory"; #else return "out of memory"; #endif /* CURL_DOES_CONVERSIONS */ 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_BAD_DOWNLOAD_RESUME: return "couldn't resume 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_SSL_ENGINE_INITFAILED: return "failed to initialise SSL crypto engine"; 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 "peer certificate cannot be authenticated with known CA certificates"; case CURLE_SSL_CACERT_BADFILE: 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_SSL_SHUTDOWN_FAILED: return "Failed to shut down the SSL connection"; case CURLE_SEND_FAIL_REWIND: return "Send failed since rewinding of the data stream failed"; case CURLE_LOGIN_DENIED: return "FTP: login denied"; case CURLE_TFTP_NOTFOUND: return "TFTP: File Not Found"; case CURLE_TFTP_PERM: return "TFTP: Access Violation"; case CURLE_TFTP_DISKFULL: return "TFTP: Disk full or allocation exceeded"; case CURLE_TFTP_ILLEGAL: return "TFTP: Illegal operation"; case CURLE_TFTP_UNKNOWNID: return "TFTP: Unknown transfer ID"; case CURLE_TFTP_EXISTS: return "TFTP: File already exists"; case CURLE_TFTP_NOSUCHUSER: return "TFTP: No such user"; case CURLE_CONV_FAILED: return "conversion failed"; case CURLE_CONV_REQD: return "caller must register CURLOPT_CONV_ callback options"; case CURLE_REMOTE_FILE_NOT_FOUND: return "Remote file not found"; case CURLE_SSH: return "Error in the SSH layer"; /* error codes not used by current libcurl */ case CURLE_URL_MALFORMAT_USER: case CURLE_FTP_USER_PASSWORD_INCORRECT: case CURLE_MALFORMAT_USER: case CURLE_BAD_CALLING_ORDER: case CURLE_BAD_PASSWORD_ENTERED: case CURLE_OBSOLETE: 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_BAD_SOCKET: return "invalid socket argument"; case CURLM_UNKNOWN_OPTION: return "unknown option"; 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 } #ifdef USE_WINSOCK /* 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) { const 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; #ifdef WSAEDISCON /* missing in SalfordC! */ case WSAEDISCON: p = "Disconnected"; break; #endif /* Extended Winsock errors */ case WSASYSNOTREADY: p = "Winsock library is not ready"; break; case WSANOTINITIALISED: p = "Winsock library not initialised"; 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 (err == CURLE_OK) return NULL; else p = "error"; #endif strncpy (buf, p, len); buf [len-1] = '\0'; return buf; } #endif /* USE_WINSOCK */ /* * 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; DEBUGASSERT(conn); DEBUGASSERT(err >= 0); buf = conn->syserr_buf; max = sizeof(conn->syserr_buf)-1; *buf = '\0'; #ifdef USE_WINSOCK #ifdef _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, (DWORD)max, NULL)) snprintf(buf, max, "Unknown error %d (%#x)", err, err); } #endif #else /* not USE_WINSOCK 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 (if non-NULL) */ if(msg) strncpy(buf, msg, max); else snprintf(buf, max, "Unknown error %d", err); } #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 ! USE_WINSOCK */ 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; DEBUGASSERT(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 */