/* * IPP utilities for CUPS. * * Copyright © 2007-2018 by Apple Inc. * Copyright © 1997-2007 by Easy Software Products. * * Licensed under Apache License v2.0. See the file "LICENSE" for more information. */ /* * Include necessary headers... */ #include "cups-private.h" #include "debug-internal.h" #include #include #if defined(_WIN32) || defined(__EMX__) # include #else # include #endif /* _WIN32 || __EMX__ */ #ifndef O_BINARY # define O_BINARY 0 #endif /* O_BINARY */ #ifndef MSG_DONTWAIT # define MSG_DONTWAIT 0 #endif /* !MSG_DONTWAIT */ /* * 'cupsDoFileRequest()' - Do an IPP request with a file. * * This function sends the IPP request and attached file to the specified * server, retrying and authenticating as necessary. The request is freed with * @link ippDelete@. */ ipp_t * /* O - Response data */ cupsDoFileRequest(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */ ipp_t *request, /* I - IPP request */ const char *resource, /* I - HTTP resource for POST */ const char *filename) /* I - File to send or @code NULL@ for none */ { ipp_t *response; /* IPP response data */ int infile; /* Input file */ DEBUG_printf(("cupsDoFileRequest(http=%p, request=%p(%s), resource=\"%s\", filename=\"%s\")", (void *)http, (void *)request, request ? ippOpString(request->request.op.operation_id) : "?", resource, filename)); if (filename) { if ((infile = open(filename, O_RDONLY | O_BINARY)) < 0) { /* * Can't get file information! */ _cupsSetError(errno == ENOENT ? IPP_STATUS_ERROR_NOT_FOUND : IPP_STATUS_ERROR_NOT_AUTHORIZED, NULL, 0); ippDelete(request); return (NULL); } } else infile = -1; response = cupsDoIORequest(http, request, resource, infile, -1); if (infile >= 0) close(infile); return (response); } /* * 'cupsDoIORequest()' - Do an IPP request with file descriptors. * * This function sends the IPP request with the optional input file "infile" to * the specified server, retrying and authenticating as necessary. The request * is freed with @link ippDelete@. * * If "infile" is a valid file descriptor, @code cupsDoIORequest@ copies * all of the data from the file after the IPP request message. * * If "outfile" is a valid file descriptor, @code cupsDoIORequest@ copies * all of the data after the IPP response message to the file. * * @since CUPS 1.3/macOS 10.5@ */ ipp_t * /* O - Response data */ cupsDoIORequest(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */ ipp_t *request, /* I - IPP request */ const char *resource, /* I - HTTP resource for POST */ int infile, /* I - File to read from or -1 for none */ int outfile) /* I - File to write to or -1 for none */ { ipp_t *response = NULL; /* IPP response data */ size_t length = 0; /* Content-Length value */ http_status_t status; /* Status of HTTP request */ struct stat fileinfo; /* File information */ ssize_t bytes; /* Number of bytes read/written */ char buffer[32768]; /* Output buffer */ DEBUG_printf(("cupsDoIORequest(http=%p, request=%p(%s), resource=\"%s\", infile=%d, outfile=%d)", (void *)http, (void *)request, request ? ippOpString(request->request.op.operation_id) : "?", resource, infile, outfile)); /* * Range check input... */ if (!request || !resource) { ippDelete(request); _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0); return (NULL); } /* * Get the default connection as needed... */ if (!http && (http = _cupsConnect()) == NULL) { ippDelete(request); return (NULL); } /* * See if we have a file to send... */ if (infile >= 0) { if (fstat(infile, &fileinfo)) { /* * Can't get file information! */ _cupsSetError(errno == EBADF ? IPP_STATUS_ERROR_NOT_FOUND : IPP_STATUS_ERROR_NOT_AUTHORIZED, NULL, 0); ippDelete(request); return (NULL); } #ifdef _WIN32 if (fileinfo.st_mode & _S_IFDIR) #else if (S_ISDIR(fileinfo.st_mode)) #endif /* _WIN32 */ { /* * Can't send a directory... */ _cupsSetError(IPP_STATUS_ERROR_NOT_POSSIBLE, strerror(EISDIR), 0); ippDelete(request); return (NULL); } #ifndef _WIN32 if (!S_ISREG(fileinfo.st_mode)) length = 0; /* Chunk when piping */ else #endif /* !_WIN32 */ length = ippLength(request) + (size_t)fileinfo.st_size; } else length = ippLength(request); DEBUG_printf(("2cupsDoIORequest: Request length=%ld, total length=%ld", (long)ippLength(request), (long)length)); /* * Clear any "Local" authentication data since it is probably stale... */ if (http->authstring && !strncmp(http->authstring, "Local ", 6)) httpSetAuthString(http, NULL, NULL); /* * Loop until we can send the request without authorization problems. */ while (response == NULL) { DEBUG_puts("2cupsDoIORequest: setup..."); /* * Send the request... */ status = cupsSendRequest(http, request, resource, length); DEBUG_printf(("2cupsDoIORequest: status=%d", status)); if (status == HTTP_STATUS_CONTINUE && request->state == IPP_STATE_DATA && infile >= 0) { DEBUG_puts("2cupsDoIORequest: file write..."); /* * Send the file with the request... */ #ifndef _WIN32 if (S_ISREG(fileinfo.st_mode)) #endif /* _WIN32 */ lseek(infile, 0, SEEK_SET); while ((bytes = read(infile, buffer, sizeof(buffer))) > 0) { if ((status = cupsWriteRequestData(http, buffer, (size_t)bytes)) != HTTP_STATUS_CONTINUE) break; } } /* * Get the server's response... */ if (status <= HTTP_STATUS_CONTINUE || status == HTTP_STATUS_OK) { response = cupsGetResponse(http, resource); status = httpGetStatus(http); } DEBUG_printf(("2cupsDoIORequest: status=%d", status)); if (status == HTTP_STATUS_ERROR || (status >= HTTP_STATUS_BAD_REQUEST && status != HTTP_STATUS_UNAUTHORIZED && status != HTTP_STATUS_UPGRADE_REQUIRED)) { _cupsSetHTTPError(status); break; } if (response && outfile >= 0) { /* * Write trailing data to file... */ while ((bytes = httpRead2(http, buffer, sizeof(buffer))) > 0) if (write(outfile, buffer, (size_t)bytes) < bytes) break; } if (http->state != HTTP_STATE_WAITING) { /* * Flush any remaining data... */ httpFlush(http); } } /* * Delete the original request and return the response... */ ippDelete(request); return (response); } /* * 'cupsDoRequest()' - Do an IPP request. * * This function sends the IPP request to the specified server, retrying * and authenticating as necessary. The request is freed with @link ippDelete@. */ ipp_t * /* O - Response data */ cupsDoRequest(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */ ipp_t *request, /* I - IPP request */ const char *resource) /* I - HTTP resource for POST */ { DEBUG_printf(("cupsDoRequest(http=%p, request=%p(%s), resource=\"%s\")", (void *)http, (void *)request, request ? ippOpString(request->request.op.operation_id) : "?", resource)); return (cupsDoIORequest(http, request, resource, -1, -1)); } /* * 'cupsGetResponse()' - Get a response to an IPP request. * * Use this function to get the response for an IPP request sent using * @link cupsSendRequest@. For requests that return additional data, use * @link cupsReadResponseData@ after getting a successful response, * otherwise call @link httpFlush@ to complete the response processing. * * @since CUPS 1.4/macOS 10.6@ */ ipp_t * /* O - Response or @code NULL@ on HTTP error */ cupsGetResponse(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */ const char *resource) /* I - HTTP resource for POST */ { http_status_t status; /* HTTP status */ ipp_state_t state; /* IPP read state */ ipp_t *response = NULL; /* IPP response */ DEBUG_printf(("cupsGetResponse(http=%p, resource=\"%s\")", (void *)http, resource)); DEBUG_printf(("1cupsGetResponse: http->state=%d", http ? http->state : HTTP_STATE_ERROR)); /* * Connect to the default server as needed... */ if (!http) { _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals */ if ((http = cg->http) == NULL) { _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No active connection."), 1); DEBUG_puts("1cupsGetResponse: No active connection - returning NULL."); return (NULL); } } if (http->state != HTTP_STATE_POST_RECV && http->state != HTTP_STATE_POST_SEND) { _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No request sent."), 1); DEBUG_puts("1cupsGetResponse: Not in POST state - returning NULL."); return (NULL); } /* * Check for an unfinished chunked request... */ if (http->data_encoding == HTTP_ENCODING_CHUNKED) { /* * Send a 0-length chunk to finish off the request... */ DEBUG_puts("2cupsGetResponse: Finishing chunked POST..."); if (httpWrite2(http, "", 0) < 0) return (NULL); } /* * Wait for a response from the server... */ DEBUG_printf(("2cupsGetResponse: Update loop, http->status=%d...", http->status)); do { status = httpUpdate(http); } while (status == HTTP_STATUS_CONTINUE); DEBUG_printf(("2cupsGetResponse: status=%d", status)); if (status == HTTP_STATUS_OK) { /* * Get the IPP response... */ response = ippNew(); while ((state = ippRead(http, response)) != IPP_STATE_DATA) if (state == IPP_STATE_ERROR) break; if (state == IPP_STATE_ERROR) { /* * Flush remaining data and delete the response... */ DEBUG_puts("1cupsGetResponse: IPP read error!"); httpFlush(http); ippDelete(response); response = NULL; http->status = status = HTTP_STATUS_ERROR; http->error = EINVAL; } } else if (status != HTTP_STATUS_ERROR) { /* * Flush any error message... */ httpFlush(http); /* * Then handle encryption and authentication... */ if (status == HTTP_STATUS_UNAUTHORIZED) { /* * See if we can do authentication... */ DEBUG_puts("2cupsGetResponse: Need authorization..."); if (!cupsDoAuthentication(http, "POST", resource)) httpReconnect2(http, 30000, NULL); else http->status = status = HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED; } #ifdef HAVE_SSL else if (status == HTTP_STATUS_UPGRADE_REQUIRED) { /* * Force a reconnect with encryption... */ DEBUG_puts("2cupsGetResponse: Need encryption..."); if (!httpReconnect2(http, 30000, NULL)) httpEncryption(http, HTTP_ENCRYPTION_REQUIRED); } #endif /* HAVE_SSL */ } if (response) { ipp_attribute_t *attr; /* status-message attribute */ attr = ippFindAttribute(response, "status-message", IPP_TAG_TEXT); DEBUG_printf(("1cupsGetResponse: status-code=%s, status-message=\"%s\"", ippErrorString(response->request.status.status_code), attr ? attr->values[0].string.text : "")); _cupsSetError(response->request.status.status_code, attr ? attr->values[0].string.text : ippErrorString(response->request.status.status_code), 0); } return (response); } /* * 'cupsLastError()' - Return the last IPP status code received on the current * thread. */ ipp_status_t /* O - IPP status code from last request */ cupsLastError(void) { return (_cupsGlobals()->last_error); } /* * 'cupsLastErrorString()' - Return the last IPP status-message received on the * current thread. * * @since CUPS 1.2/macOS 10.5@ */ const char * /* O - status-message text from last request */ cupsLastErrorString(void) { return (_cupsGlobals()->last_status_message); } /* * '_cupsNextDelay()' - Return the next retry delay value. * * This function currently returns the Fibonacci sequence 1 1 2 3 5 8. * * Pass 0 for the current delay value to initialize the sequence. */ int /* O - Next delay value */ _cupsNextDelay(int current, /* I - Current delay value or 0 */ int *previous) /* IO - Previous delay value */ { int next; /* Next delay value */ if (current > 0) { next = (current + *previous) % 12; *previous = next < current ? 0 : current; } else { next = 1; *previous = 0; } return (next); } /* * 'cupsReadResponseData()' - Read additional data after the IPP response. * * This function is used after @link cupsGetResponse@ to read the PPD or document * files from @code CUPS_GET_PPD@ and @code CUPS_GET_DOCUMENT@ requests, * respectively. * * @since CUPS 1.4/macOS 10.6@ */ ssize_t /* O - Bytes read, 0 on EOF, -1 on error */ cupsReadResponseData( http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */ char *buffer, /* I - Buffer to use */ size_t length) /* I - Number of bytes to read */ { /* * Get the default connection as needed... */ DEBUG_printf(("cupsReadResponseData(http=%p, buffer=%p, length=" CUPS_LLFMT ")", (void *)http, (void *)buffer, CUPS_LLCAST length)); if (!http) { _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals */ if ((http = cg->http) == NULL) { _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No active connection"), 1); return (-1); } } /* * Then read from the HTTP connection... */ return (httpRead2(http, buffer, length)); } /* * 'cupsSendRequest()' - Send an IPP request. * * Use @link cupsWriteRequestData@ to write any additional data (document, PPD * file, etc.) for the request, @link cupsGetResponse@ to get the IPP response, * and @link cupsReadResponseData@ to read any additional data following the * response. Only one request can be sent/queued at a time per @code http_t@ * connection. * * Returns the initial HTTP status code, which will be @code HTTP_STATUS_CONTINUE@ * on a successful send of the request. * * Note: Unlike @link cupsDoFileRequest@, @link cupsDoIORequest@, and * @link cupsDoRequest@, the request is NOT freed with @link ippDelete@. * * @since CUPS 1.4/macOS 10.6@ */ http_status_t /* O - Initial HTTP status */ cupsSendRequest(http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */ ipp_t *request, /* I - IPP request */ const char *resource, /* I - Resource path */ size_t length) /* I - Length of data to follow or @code CUPS_LENGTH_VARIABLE@ */ { http_status_t status; /* Status of HTTP request */ int got_status; /* Did we get the status? */ ipp_state_t state; /* State of IPP processing */ http_status_t expect; /* Expect: header to use */ char date[256]; /* Date: header value */ int digest; /* Are we using Digest authentication? */ DEBUG_printf(("cupsSendRequest(http=%p, request=%p(%s), resource=\"%s\", length=" CUPS_LLFMT ")", (void *)http, (void *)request, request ? ippOpString(request->request.op.operation_id) : "?", resource, CUPS_LLCAST length)); /* * Range check input... */ if (!request || !resource) { _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0); return (HTTP_STATUS_ERROR); } /* * Get the default connection as needed... */ if (!http && (http = _cupsConnect()) == NULL) return (HTTP_STATUS_SERVICE_UNAVAILABLE); /* * If the prior request was not flushed out, do so now... */ if (http->state == HTTP_STATE_GET_SEND || http->state == HTTP_STATE_POST_SEND) { DEBUG_puts("2cupsSendRequest: Flush prior response."); httpFlush(http); } else if (http->state != HTTP_STATE_WAITING) { DEBUG_printf(("1cupsSendRequest: Unknown HTTP state (%d), " "reconnecting.", http->state)); if (httpReconnect2(http, 30000, NULL)) return (HTTP_STATUS_ERROR); } #ifdef HAVE_SSL /* * See if we have an auth-info attribute and are communicating over * a non-local link. If so, encrypt the link so that we can pass * the authentication information securely... */ if (ippFindAttribute(request, "auth-info", IPP_TAG_TEXT) && !httpAddrLocalhost(http->hostaddr) && !http->tls && httpEncryption(http, HTTP_ENCRYPTION_REQUIRED)) { DEBUG_puts("1cupsSendRequest: Unable to encrypt connection."); return (HTTP_STATUS_SERVICE_UNAVAILABLE); } #endif /* HAVE_SSL */ /* * Reconnect if the last response had a "Connection: close"... */ if (!_cups_strcasecmp(httpGetField(http, HTTP_FIELD_CONNECTION), "close")) { DEBUG_puts("2cupsSendRequest: Connection: close"); httpClearFields(http); if (httpReconnect2(http, 30000, NULL)) { DEBUG_puts("1cupsSendRequest: Unable to reconnect."); return (HTTP_STATUS_SERVICE_UNAVAILABLE); } } /* * Loop until we can send the request without authorization problems. */ expect = HTTP_STATUS_CONTINUE; for (;;) { DEBUG_puts("2cupsSendRequest: Setup..."); /* * Setup the HTTP variables needed... */ httpClearFields(http); httpSetExpect(http, expect); httpSetField(http, HTTP_FIELD_CONTENT_TYPE, "application/ipp"); httpSetField(http, HTTP_FIELD_DATE, httpGetDateString2(time(NULL), date, (int)sizeof(date))); httpSetLength(http, length); digest = http->authstring && !strncmp(http->authstring, "Digest ", 7); if (digest) { /* * Update the Digest authentication string... */ _httpSetDigestAuthString(http, http->nextnonce, "POST", resource); } #ifdef HAVE_GSSAPI if (http->authstring && !strncmp(http->authstring, "Negotiate", 9)) { /* * Do not use cached Kerberos credentials since they will look like a * "replay" attack... */ _cupsSetNegotiateAuthString(http, "POST", resource); } #endif /* HAVE_GSSAPI */ httpSetField(http, HTTP_FIELD_AUTHORIZATION, http->authstring); DEBUG_printf(("2cupsSendRequest: authstring=\"%s\"", http->authstring)); /* * Try the request... */ DEBUG_puts("2cupsSendRequest: Sending HTTP POST..."); if (httpPost(http, resource)) { DEBUG_puts("2cupsSendRequest: POST failed, reconnecting."); if (httpReconnect2(http, 30000, NULL)) { DEBUG_puts("1cupsSendRequest: Unable to reconnect."); return (HTTP_STATUS_SERVICE_UNAVAILABLE); } else continue; } /* * Send the IPP data... */ DEBUG_puts("2cupsSendRequest: Writing IPP request..."); request->state = IPP_STATE_IDLE; status = HTTP_STATUS_CONTINUE; got_status = 0; while ((state = ippWrite(http, request)) != IPP_STATE_DATA) { if (httpCheck(http)) { got_status = 1; _httpUpdate(http, &status); if (status >= HTTP_STATUS_MULTIPLE_CHOICES) break; } else if (state == IPP_STATE_ERROR) break; } if (state == IPP_STATE_ERROR) { /* * We weren't able to send the IPP request. But did we already get a HTTP * error status? */ if (!got_status || status < HTTP_STATUS_MULTIPLE_CHOICES) { /* * No, something else went wrong. */ DEBUG_puts("1cupsSendRequest: Unable to send IPP request."); http->status = HTTP_STATUS_ERROR; http->state = HTTP_STATE_WAITING; return (HTTP_STATUS_ERROR); } } /* * Wait up to 1 second to get the 100-continue response as needed... */ if (!got_status || (digest && status == HTTP_STATUS_CONTINUE)) { if (expect == HTTP_STATUS_CONTINUE || digest) { DEBUG_puts("2cupsSendRequest: Waiting for 100-continue..."); if (httpWait(http, 1000)) _httpUpdate(http, &status); } else if (httpCheck(http)) _httpUpdate(http, &status); } DEBUG_printf(("2cupsSendRequest: status=%d", status)); /* * Process the current HTTP status... */ if (status >= HTTP_STATUS_MULTIPLE_CHOICES) { int temp_status; /* Temporary status */ _cupsSetHTTPError(status); do { temp_status = httpUpdate(http); } while (temp_status != HTTP_STATUS_ERROR && http->state == HTTP_STATE_POST_RECV); httpFlush(http); } switch (status) { case HTTP_STATUS_CONTINUE : case HTTP_STATUS_OK : case HTTP_STATUS_ERROR : DEBUG_printf(("1cupsSendRequest: Returning %d.", status)); return (status); case HTTP_STATUS_UNAUTHORIZED : if (cupsDoAuthentication(http, "POST", resource)) { DEBUG_puts("1cupsSendRequest: Returning HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED."); return (HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED); } DEBUG_puts("2cupsSendRequest: Reconnecting after HTTP_STATUS_UNAUTHORIZED."); if (httpReconnect2(http, 30000, NULL)) { DEBUG_puts("1cupsSendRequest: Unable to reconnect."); return (HTTP_STATUS_SERVICE_UNAVAILABLE); } break; #ifdef HAVE_SSL case HTTP_STATUS_UPGRADE_REQUIRED : /* * Flush any error message, reconnect, and then upgrade with * encryption... */ DEBUG_puts("2cupsSendRequest: Reconnecting after " "HTTP_STATUS_UPGRADE_REQUIRED."); if (httpReconnect2(http, 30000, NULL)) { DEBUG_puts("1cupsSendRequest: Unable to reconnect."); return (HTTP_STATUS_SERVICE_UNAVAILABLE); } DEBUG_puts("2cupsSendRequest: Upgrading to TLS."); if (httpEncryption(http, HTTP_ENCRYPTION_REQUIRED)) { DEBUG_puts("1cupsSendRequest: Unable to encrypt connection."); return (HTTP_STATUS_SERVICE_UNAVAILABLE); } break; #endif /* HAVE_SSL */ case HTTP_STATUS_EXPECTATION_FAILED : /* * Don't try using the Expect: header the next time around... */ expect = (http_status_t)0; DEBUG_puts("2cupsSendRequest: Reconnecting after " "HTTP_EXPECTATION_FAILED."); if (httpReconnect2(http, 30000, NULL)) { DEBUG_puts("1cupsSendRequest: Unable to reconnect."); return (HTTP_STATUS_SERVICE_UNAVAILABLE); } break; default : /* * Some other error... */ return (status); } } } /* * 'cupsWriteRequestData()' - Write additional data after an IPP request. * * This function is used after @link cupsSendRequest@ to provide a PPD and * after @link cupsStartDocument@ to provide a document file. * * @since CUPS 1.4/macOS 10.6@ */ http_status_t /* O - @code HTTP_STATUS_CONTINUE@ if OK or HTTP status on error */ cupsWriteRequestData( http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */ const char *buffer, /* I - Bytes to write */ size_t length) /* I - Number of bytes to write */ { int wused; /* Previous bytes in buffer */ /* * Get the default connection as needed... */ DEBUG_printf(("cupsWriteRequestData(http=%p, buffer=%p, length=" CUPS_LLFMT ")", (void *)http, (void *)buffer, CUPS_LLCAST length)); if (!http) { _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals */ if ((http = cg->http) == NULL) { _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("No active connection"), 1); DEBUG_puts("1cupsWriteRequestData: Returning HTTP_STATUS_ERROR."); return (HTTP_STATUS_ERROR); } } /* * Then write to the HTTP connection... */ wused = http->wused; if (httpWrite2(http, buffer, length) < 0) { DEBUG_puts("1cupsWriteRequestData: Returning HTTP_STATUS_ERROR."); _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(http->error), 0); return (HTTP_STATUS_ERROR); } /* * Finally, check if we have any pending data from the server... */ if (length >= HTTP_MAX_BUFFER || http->wused < wused || (wused > 0 && (size_t)http->wused == length)) { /* * We've written something to the server, so check for response data... */ if (_httpWait(http, 0, 1)) { http_status_t status; /* Status from _httpUpdate */ _httpUpdate(http, &status); if (status >= HTTP_STATUS_MULTIPLE_CHOICES) { _cupsSetHTTPError(status); do { status = httpUpdate(http); } while (status != HTTP_STATUS_ERROR && http->state == HTTP_STATE_POST_RECV); httpFlush(http); } DEBUG_printf(("1cupsWriteRequestData: Returning %d.\n", status)); return (status); } } DEBUG_puts("1cupsWriteRequestData: Returning HTTP_STATUS_CONTINUE."); return (HTTP_STATUS_CONTINUE); } /* * '_cupsConnect()' - Get the default server connection... */ http_t * /* O - HTTP connection */ _cupsConnect(void) { _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals */ /* * See if we are connected to the same server... */ if (cg->http) { /* * Compare the connection hostname, port, and encryption settings to * the cached defaults; these were initialized the first time we * connected... */ if (strcmp(cg->http->hostname, cg->server) || #ifdef AF_LOCAL (httpAddrFamily(cg->http->hostaddr) != AF_LOCAL && cg->ipp_port != httpAddrPort(cg->http->hostaddr)) || #else cg->ipp_port != httpAddrPort(cg->http->hostaddr) || #endif /* AF_LOCAL */ (cg->http->encryption != cg->encryption && cg->http->encryption == HTTP_ENCRYPTION_NEVER)) { /* * Need to close the current connection because something has changed... */ httpClose(cg->http); cg->http = NULL; } else { /* * Same server, see if the connection is still established... */ char ch; /* Connection check byte */ ssize_t n; /* Number of bytes */ #ifdef _WIN32 if ((n = recv(cg->http->fd, &ch, 1, MSG_PEEK)) == 0 || (n < 0 && WSAGetLastError() != WSAEWOULDBLOCK)) #else if ((n = recv(cg->http->fd, &ch, 1, MSG_PEEK | MSG_DONTWAIT)) == 0 || (n < 0 && errno != EWOULDBLOCK)) #endif /* _WIN32 */ { /* * Nope, close the connection... */ httpClose(cg->http); cg->http = NULL; } } } /* * (Re)connect as needed... */ if (!cg->http) { if ((cg->http = httpConnect2(cupsServer(), ippPort(), NULL, AF_UNSPEC, cupsEncryption(), 1, 30000, NULL)) == NULL) { if (errno) _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, NULL, 0); else _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, _("Unable to connect to host."), 1); } } /* * Return the cached connection... */ return (cg->http); } /* * '_cupsSetError()' - Set the last IPP status code and status-message. */ void _cupsSetError(ipp_status_t status, /* I - IPP status code */ const char *message, /* I - status-message value */ int localize) /* I - Localize the message? */ { _cups_globals_t *cg; /* Global data */ if (!message && errno) { message = strerror(errno); localize = 0; } cg = _cupsGlobals(); cg->last_error = status; if (cg->last_status_message) { _cupsStrFree(cg->last_status_message); cg->last_status_message = NULL; } if (message) { if (localize) { /* * Get the message catalog... */ if (!cg->lang_default) cg->lang_default = cupsLangDefault(); cg->last_status_message = _cupsStrAlloc(_cupsLangString(cg->lang_default, message)); } else cg->last_status_message = _cupsStrAlloc(message); } DEBUG_printf(("4_cupsSetError: last_error=%s, last_status_message=\"%s\"", ippErrorString(cg->last_error), cg->last_status_message)); } /* * '_cupsSetHTTPError()' - Set the last error using the HTTP status. */ void _cupsSetHTTPError(http_status_t status) /* I - HTTP status code */ { switch (status) { case HTTP_STATUS_NOT_FOUND : _cupsSetError(IPP_STATUS_ERROR_NOT_FOUND, httpStatus(status), 0); break; case HTTP_STATUS_UNAUTHORIZED : _cupsSetError(IPP_STATUS_ERROR_NOT_AUTHENTICATED, httpStatus(status), 0); break; case HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED : _cupsSetError(IPP_STATUS_ERROR_CUPS_AUTHENTICATION_CANCELED, httpStatus(status), 0); break; case HTTP_STATUS_FORBIDDEN : _cupsSetError(IPP_STATUS_ERROR_FORBIDDEN, httpStatus(status), 0); break; case HTTP_STATUS_BAD_REQUEST : _cupsSetError(IPP_STATUS_ERROR_BAD_REQUEST, httpStatus(status), 0); break; case HTTP_STATUS_REQUEST_TOO_LARGE : _cupsSetError(IPP_STATUS_ERROR_REQUEST_VALUE, httpStatus(status), 0); break; case HTTP_STATUS_NOT_IMPLEMENTED : _cupsSetError(IPP_STATUS_ERROR_OPERATION_NOT_SUPPORTED, httpStatus(status), 0); break; case HTTP_STATUS_NOT_SUPPORTED : _cupsSetError(IPP_STATUS_ERROR_VERSION_NOT_SUPPORTED, httpStatus(status), 0); break; case HTTP_STATUS_UPGRADE_REQUIRED : _cupsSetError(IPP_STATUS_ERROR_CUPS_UPGRADE_REQUIRED, httpStatus(status), 0); break; case HTTP_STATUS_CUPS_PKI_ERROR : _cupsSetError(IPP_STATUS_ERROR_CUPS_PKI, httpStatus(status), 0); break; case HTTP_STATUS_ERROR : _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(errno), 0); break; default : DEBUG_printf(("4_cupsSetHTTPError: HTTP error %d mapped to " "IPP_STATUS_ERROR_SERVICE_UNAVAILABLE!", status)); _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, httpStatus(status), 0); break; } }