362 lines
12 KiB
C
362 lines
12 KiB
C
/*
|
|
*
|
|
***** BEGIN LICENSE BLOCK *****
|
|
|
|
Copyright (C) 2009-2019 Olof Hagsand
|
|
Copyright (C) 2020-2022 Olof Hagsand and Rubicon Communications, LLC(Netgate)
|
|
|
|
This file is part of CLIXON.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
|
|
Alternatively, the contents of this file may be used under the terms of
|
|
the GNU General Public License Version 3 or later (the "GPL"),
|
|
in which case the provisions of the GPL are applicable instead
|
|
of those above. If you wish to allow use of your version of this file only
|
|
under the terms of the GPL, and not to allow others to
|
|
use your version of this file under the terms of Apache License version 2,
|
|
indicate your decision by deleting the provisions above and replace them with
|
|
the notice and other provisions required by the GPL. If you do not delete
|
|
the provisions above, a recipient may use your version of this file under
|
|
the terms of any one of the Apache License version 2 or the GPL.
|
|
|
|
***** END LICENSE BLOCK *****
|
|
*
|
|
* Return errors
|
|
* @see RFC 7231 Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content
|
|
|
|
|
|
* "api-path" is "URI-encoded path expression" definition in RFC8040 3.5.3
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "clixon_config.h" /* generated by config & autoconf */
|
|
#endif
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
#include <syslog.h>
|
|
#include <fcntl.h>
|
|
#include <ctype.h>
|
|
#include <time.h>
|
|
#include <signal.h>
|
|
#include <assert.h>
|
|
#include <dlfcn.h>
|
|
#include <sys/param.h>
|
|
#include <sys/time.h>
|
|
#include <sys/wait.h>
|
|
|
|
/* cligen */
|
|
#include <cligen/cligen.h>
|
|
|
|
/* clicon */
|
|
#include <clixon/clixon.h>
|
|
|
|
#include "restconf_lib.h"
|
|
#include "restconf_api.h"
|
|
#include "restconf_err.h"
|
|
|
|
/*! HTTP error 405 Not Allowed
|
|
* @param[in] req Generic http handle
|
|
* @param[in] allow Which methods are allowed
|
|
* @param[in] pretty Pretty-print of reply
|
|
* @param[in] media_out Restconf output media
|
|
*/
|
|
int
|
|
restconf_method_notallowed(clicon_handle h,
|
|
void *req,
|
|
char *allow,
|
|
int pretty,
|
|
restconf_media media)
|
|
{
|
|
int retval = -1;
|
|
cxobj *xerr = NULL;
|
|
|
|
if (netconf_operation_not_supported_xml(&xerr, "protocol", "Method not allowed") < 0)
|
|
goto done;
|
|
/* Assume not-supported mapped to Not Allowed with allow header */
|
|
if (restconf_reply_header(req, "Allow", "%s", allow) < 0)
|
|
goto done;
|
|
if (api_return_err0(h, req, xerr, pretty, YANG_DATA_JSON, 0) < 0)
|
|
goto done;
|
|
retval = 0;
|
|
done:
|
|
if (xerr)
|
|
xml_free(xerr);
|
|
return retval;
|
|
}
|
|
|
|
/*! HTTP error 415 Unsupported media
|
|
* @param[in] req Generic http handle
|
|
* RFC8040, section 5.2:
|
|
* If the server does not support the requested input encoding for a request, then it MUST
|
|
* return an error response with a "415 Unsupported Media Type" status-line
|
|
*/
|
|
int
|
|
restconf_unsupported_media(clicon_handle h,
|
|
void *req,
|
|
int pretty,
|
|
restconf_media media)
|
|
{
|
|
int retval = -1;
|
|
cxobj *xerr = NULL;
|
|
|
|
if (netconf_operation_not_supported_xml(&xerr, "protocol", "Unsupported Media Type") < 0)
|
|
goto done;
|
|
/* override with 415 netconf->restoconf translation which gives a 405 */
|
|
if (api_return_err0(h, req, xerr, pretty, media, 415) < 0)
|
|
goto done;
|
|
retval = 0;
|
|
done:
|
|
if (xerr)
|
|
xml_free(xerr);
|
|
return retval;
|
|
}
|
|
|
|
/*! HTTP error 406 Not acceptable
|
|
*
|
|
* @param[in] req Generic http handle
|
|
* RFC8040, section 5.2:
|
|
* If the server does not support any of the requested output encodings for a request, then it MUST
|
|
* return an error response with a "406 Not Acceptable" status-line.
|
|
*/
|
|
int
|
|
restconf_not_acceptable(clicon_handle h,
|
|
void *req,
|
|
int pretty,
|
|
restconf_media media)
|
|
{
|
|
int retval = -1;
|
|
cxobj *xerr = NULL;
|
|
|
|
if (netconf_operation_not_supported_xml(&xerr, "protocol", "Unacceptable output encoding") < 0)
|
|
goto done;
|
|
/* Override with 415 netconf->restoconf translation which gives a 405 */
|
|
if (api_return_err0(h, req, xerr, pretty, media, 415) < 0)
|
|
goto done;
|
|
if (restconf_reply_send(req, 415, NULL, 0) < 0)
|
|
goto done;
|
|
retval = 0;
|
|
done:
|
|
return retval;
|
|
}
|
|
|
|
/*! HTTP error 501 Not implemented
|
|
* @param[in] req Generic http handle
|
|
*/
|
|
int
|
|
restconf_notimplemented(clicon_handle h,
|
|
void *req,
|
|
int pretty,
|
|
restconf_media media)
|
|
{
|
|
int retval = -1;
|
|
cxobj *xerr = NULL;
|
|
|
|
if (netconf_operation_not_supported_xml(&xerr, "protocol", "Not Implemented") < 0)
|
|
goto done;
|
|
/* Override with 501 Not Implemented netconf->restoconf translation which gives a 405 */
|
|
if (api_return_err0(h, req, xerr, pretty, YANG_DATA_JSON, 501) < 0)
|
|
goto done;
|
|
retval = 0;
|
|
done:
|
|
if (xerr)
|
|
xml_free(xerr);
|
|
return retval;
|
|
}
|
|
|
|
/*! Generic restconf error function on get/head request
|
|
* @param[in] h Clixon handle
|
|
* @param[in] req Generic http handle
|
|
* @param[in] xerr XML error message (eg from backend, or from a clixon_netconf_lib function)
|
|
* @param[in] pretty Set to 1 for pretty-printed xml/json output
|
|
* @param[in] media Output media
|
|
* @param[in] code If 0 use rfc8040 sec 7 netconf2restconf error-tag mapping
|
|
* otherwise use this code
|
|
* xerr should be on the form: <rpc-error>... otherwise an internal error is generated
|
|
* @note there are special cases see code
|
|
*/
|
|
int
|
|
api_return_err(clicon_handle h,
|
|
void *req,
|
|
cxobj *xerr,
|
|
int pretty,
|
|
restconf_media media,
|
|
int code0)
|
|
{
|
|
int retval = -1;
|
|
cbuf *cb = NULL;
|
|
cbuf *cberr = NULL;
|
|
cxobj *xtag;
|
|
char *tagstr;
|
|
int code;
|
|
cxobj *xerr2 = NULL;
|
|
cxobj *xmsg;
|
|
char *mb;
|
|
|
|
clicon_debug(1, "%s", __FUNCTION__);
|
|
if ((cb = cbuf_new()) == NULL){
|
|
clicon_err(OE_UNIX, errno, "cbuf_new");
|
|
goto done;
|
|
}
|
|
/* A well-formed error message when entering here should look like:
|
|
* <rpc-error>...<error-tag>invalid-value</error-tag>
|
|
* Check this is so, otherwise generate an internal error.
|
|
*/
|
|
if (strcmp(xml_name(xerr), "rpc-error") != 0 ||
|
|
(xtag = xpath_first(xerr, NULL, "error-tag")) == NULL){
|
|
if ((cberr = cbuf_new()) == NULL){
|
|
clicon_err(OE_UNIX, errno, "cbuf_new");
|
|
goto done;
|
|
}
|
|
cprintf(cberr, "Internal error, system returned invalid error message: ");
|
|
if (netconf_err2cb(xerr, cberr) < 0)
|
|
goto done;
|
|
if (netconf_operation_failed_xml(&xerr2, "application",
|
|
cbuf_get(cberr)) < 0)
|
|
goto done;
|
|
if ((xerr = xpath_first(xerr2, NULL, "rpc-error")) == NULL){
|
|
clicon_err(OE_XML, 0, "Internal error, shouldnt happen");
|
|
goto done;
|
|
}
|
|
if ((xtag = xpath_first(xerr, NULL, "error-tag")) == NULL){
|
|
clicon_err(OE_XML, 0, "Internal error, shouldnt happen");
|
|
goto done;
|
|
}
|
|
}
|
|
#if 1
|
|
clicon_debug_xml(1, xerr, "%s Send error:", __FUNCTION__);
|
|
#endif
|
|
if (xml_name_set(xerr, "error") < 0)
|
|
goto done;
|
|
tagstr = xml_body(xtag);
|
|
if (code0 != 0)
|
|
code = code0;
|
|
else{
|
|
if ((code = restconf_err2code(tagstr)) < 0)
|
|
code = 500; /* internal server error */
|
|
if (code == 403){
|
|
/* Special case: netconf only has "access denied" while restconf
|
|
* differentiates between:
|
|
* 401 Unauthorized If the RESTCONF client is not authenticated (sec 2.5)
|
|
* 403 Forbidden If the user is not authorized to access a target resource or invoke
|
|
* an operation
|
|
*/
|
|
if ((xmsg = xpath_first(xerr, NULL, "error-message")) != NULL &&
|
|
(mb = xml_body(xmsg)) != NULL &&
|
|
strcmp(mb, "The requested URL was unauthorized") == 0)
|
|
code = 401; /* Unauthorized */
|
|
}
|
|
/* Special case #2 */
|
|
if (code == 400){
|
|
if (strcmp(tagstr, "invalid-value") == 0 &&
|
|
(xmsg = xpath_first(xerr, NULL, "error-message")) != NULL &&
|
|
(mb = xml_body(xmsg)) != NULL &&
|
|
strcmp(mb, "Invalid HTTP data method") == 0)
|
|
code = 404; /* Not found */
|
|
}
|
|
}
|
|
if (restconf_reply_header(req, "Content-Type", "%s", restconf_media_int2str(media)) < 0) // XXX
|
|
goto done;
|
|
switch (media){
|
|
case YANG_DATA_XML:
|
|
case YANG_PATCH_XML:
|
|
case YANG_PAGINATION_XML:
|
|
clicon_debug(1, "%s code:%d", __FUNCTION__, code);
|
|
if (pretty){
|
|
cprintf(cb, " <errors xmlns=\"urn:ietf:params:xml:ns:yang:ietf-restconf\">\n");
|
|
if (clixon_xml2cbuf(cb, xerr, 2, pretty, NULL, -1, 0) < 0)
|
|
goto done;
|
|
cprintf(cb, " </errors>\r\n");
|
|
}
|
|
else {
|
|
cprintf(cb, "<errors xmlns=\"urn:ietf:params:xml:ns:yang:ietf-restconf\">");
|
|
if (clixon_xml2cbuf(cb, xerr, 2, pretty, NULL, -1, 0) < 0)
|
|
goto done;
|
|
cprintf(cb, "</errors>\r\n");
|
|
}
|
|
break;
|
|
case YANG_DATA_JSON:
|
|
case YANG_PATCH_JSON:
|
|
clicon_debug(1, "%s code:%d", __FUNCTION__, code);
|
|
if (pretty){
|
|
cprintf(cb, "{\n\"ietf-restconf:errors\" : ");
|
|
if (clixon_json2cbuf(cb, xerr, pretty, 0, 0) < 0)
|
|
goto done;
|
|
cprintf(cb, "\n}\r\n");
|
|
}
|
|
else{
|
|
cprintf(cb, "{");
|
|
cprintf(cb, "\"ietf-restconf:errors\":");
|
|
if (clixon_json2cbuf(cb, xerr, pretty, 0, 0) < 0)
|
|
goto done;
|
|
cprintf(cb, "}\r\n");
|
|
}
|
|
break;
|
|
default: /* Just ignore the body so that there is a reply */
|
|
clicon_err(OE_YANG, EINVAL, "Invalid media type %d", media);
|
|
goto done;
|
|
break;
|
|
} /* switch media */
|
|
assert(cbuf_len(cb));
|
|
if (restconf_reply_send(req, code, cb, 0) < 0)
|
|
goto done;
|
|
cb = NULL;
|
|
// ok:
|
|
retval = 0;
|
|
done:
|
|
clicon_debug(1, "%s retval:%d", __FUNCTION__, retval);
|
|
if (cb)
|
|
cbuf_free(cb);
|
|
if (cberr)
|
|
cbuf_free(cberr);
|
|
return retval;
|
|
}
|
|
|
|
/*! Generic restconf error function on get/head request
|
|
*
|
|
* Variant of api_return_err on the form <xxx><rpc-error>...
|
|
* This is the form most functions in clixon_netconf_lib returns errors.
|
|
* @param[in] h Clixon handle
|
|
* @param[in] req Generic http handle
|
|
* @param[in] xerr XML error message (eg from backend, or from a clixon_netconf_lib function)
|
|
* @param[in] pretty Set to 1 for pretty-printed xml/json output
|
|
* @param[in] media Output media
|
|
* @param[in] code If 0 use rfc8040 sec 7 netconf2restconf error-tag mapping
|
|
* otherwise use this code
|
|
* @see api_return_err where top level is expected to be <rpc-error>
|
|
*/
|
|
int
|
|
api_return_err0(clicon_handle h,
|
|
void *req,
|
|
cxobj *xerr,
|
|
int pretty,
|
|
restconf_media media,
|
|
int code)
|
|
{
|
|
int retval = -1;
|
|
cxobj *xe;
|
|
|
|
if ((xe = xpath_first(xerr, NULL, "rpc-error")) == NULL){
|
|
clicon_err(OE_XML, EINVAL, "Expected xml on the form <rpc-error>..");
|
|
goto done;
|
|
}
|
|
if (api_return_err(h, req, xe, pretty, media, code) < 0)
|
|
goto done;
|
|
retval = 0;
|
|
done:
|
|
return retval;
|
|
}
|