http_status_t httpUpdate(http_t *http)
{
http_status_t status; /* Request status */
if (http->wused)
{
if (httpFlushWrite(http) < 0)
return (HTTP_ERROR);
}
if (http->state == HTTP_WAITING)
return (HTTP_CONTINUE);
while (_httpUpdate(http, &status));
/*
* See if there was an error...
*/
if (http->error == EPIPE && http->status > HTTP_CONTINUE)
{
return (http->status);
}
if (http->error)
{
http->status = HTTP_ERROR;
return (HTTP_ERROR);
}
/*
* Return the current status...
*/
return (status);
}
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 ")", http, 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 && 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);
}
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 */
DEBUG_printf(("cupsSendRequest(http=%p, request=%p(%s), resource=\"%s\", "
"length=" CUPS_LLFMT ")", http, 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)
if ((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(http->fields[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");
httpSetLength(http, length);
#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 (state == IPP_STATE_ERROR)
break;
else if (httpCheck(http))
{
got_status = 1;
_httpUpdate(http, &status);
if (status >= HTTP_STATUS_MULTIPLE_CHOICES)
break;
}
if (state == IPP_STATE_ERROR)
{
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)
{
if (expect == HTTP_STATUS_CONTINUE)
{
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);
}
}
}
