/
request.c
1179 lines (935 loc) · 29.2 KB
/
request.c
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/*
* 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 <fcntl.h>
#include <sys/stat.h>
#if defined(_WIN32) || defined(__EMX__)
# include <io.h>
#else
# include <unistd.h>
#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 = 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 = 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...
*/