480 lines
12 KiB
C
480 lines
12 KiB
C
/*
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*
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***** BEGIN LICENSE BLOCK *****
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Copyright (C) 2009-2020 Olof Hagsand
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Copyright (C) 2020 Olof Hagsand and Rubicon Communications, LLC(Netgate)
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This file is part of CLIXON.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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Alternatively, the contents of this file may be used under the terms of
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the GNU General Public License Version 3 or later (the "GPL"),
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in which case the provisions of the GPL are applicable instead
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of those above. If you wish to allow use of your version of this file only
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under the terms of the GPL, and not to allow others to
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use your version of this file under the terms of Apache License version 2,
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indicate your decision by deleting the provisions above and replace them with
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the notice and other provisions required by the GPL. If you do not delete
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the provisions above, a recipient may use your version of this file under
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the terms of any one of the Apache License version 2 or the GPL.
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***** END LICENSE BLOCK *****
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*
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* Return errors
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* @see RFC 7231 Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <signal.h>
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#include <syslog.h>
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#include <fcntl.h>
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#include <ctype.h>
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#include <time.h>
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#include <signal.h>
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#include <dlfcn.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/wait.h>
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/* cligen */
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#include <cligen/cligen.h>
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/* clicon */
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#include <clixon/clixon.h>
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#include "restconf_lib.h"
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#include "restconf_api.h"
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#include "restconf_err.h"
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/*
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* Constants
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*/
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/* In the fcgi implementations some errors had body, it would be cleaner to skip them
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* None seem mandatory according to RFC 7231
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*/
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#define SKIP_BODY
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/*
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* NOTE, fcgi seems not enough with a status code (libevhtp is) but must also have a status
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* header.
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*/
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/*! HTTP error 400
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* @param[in] h Clicon handle
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* @param[in] req Generic Www handle
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*/
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int
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restconf_badrequest(clicon_handle h,
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void *req)
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{
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int retval = -1;
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#ifdef SKIP_BODY /* Remove the body - should it really be there? */
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if (restconf_reply_send(req, 400, NULL) < 0)
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goto done;
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retval = 0;
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done:
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#else
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char *path;
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cbuf *cb = NULL;
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/* Create body */
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if ((cb = cbuf_new()) == NULL){
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clicon_err(OE_UNIX, errno, "cbuf_new");
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goto done;
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}
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path = restconf_param_get("REQUEST_URI", r->envp);
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if (restconf_reply_header(req, "Content-Type", "text/html") < 0)
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goto done;
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cprintf(cb, "The requested URL %s or data is in some way badly formed.\n", path);
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if (restconf_reply_send(req, 400, cb) < 0)
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goto done;
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retval = 0;
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done:
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if (cb)
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cbuf_free(cb);
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#endif
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return retval;
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}
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/*! HTTP error 401
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* @param[in] h Clicon handle
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* @param[in] req Generic Www handle
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*/
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int
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restconf_unauthorized(clicon_handle h,
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void *req)
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{
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int retval = -1;
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#ifdef SKIP_BODY /* Remove the body - should it really be there? */
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if (restconf_reply_send(req, 400, NULL) < 0)
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goto done;
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retval = 0;
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done:
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#else
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char *path;
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cbuf *cb = NULL;
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/* Create body */
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if ((cb = cbuf_new()) == NULL){
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clicon_err(OE_UNIX, errno, "cbuf_new");
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goto done;
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}
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path = restconf_param_get("REQUEST_URI", r->envp);
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if (restconf_reply_header(req, "Content-Type", "text/html") < 0)
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goto done;
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cprintf(cb, "<error-tag>access-denied</error-tag>\n");
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cprintf(cb, "The requested URL %s was unauthorized.\n", path);
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if (restconf_reply_send(req, 400, cb) < 0)
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goto done;
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retval = 0;
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done:
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if (cb)
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cbuf_free(cb);
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#endif
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return retval;
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}
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/*! HTTP error 403
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* @param[in] h Clicon handle
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* @param[in] req Generic Www handle
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*/
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int
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restconf_forbidden(clicon_handle h,
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void *req)
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{
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int retval = -1;
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#ifdef SKIP_BODY /* Remove the body - should it really be there? */
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if (restconf_reply_send(req, 403, NULL) < 0)
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goto done;
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retval = 0;
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done:
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#else
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char *path;
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cbuf *cb = NULL;
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/* Create body */
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if ((cb = cbuf_new()) == NULL){
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clicon_err(OE_UNIX, errno, "cbuf_new");
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goto done;
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}
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path = restconf_param_get("REQUEST_URI", r->envp);
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if (restconf_reply_header(req, "Content-Type", "text/html") < 0)
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goto done;
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cprintf(cb, "The requested URL %s was forbidden.\n", path);
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if (restconf_reply_send(req, 403, cb) < 0)
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goto done;
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retval = 0;
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done:
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if (cb)
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cbuf_free(cb);
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#endif
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return retval;
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}
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/*! HTTP error 404
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* @param[in] h Clicon handle
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* @param[in] req Generic Www handle
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* XXX skip body?
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*/
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int
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restconf_notfound(clicon_handle h,
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void *req)
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{
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int retval = -1;
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#ifdef SKIP_BODY /* Remove the body - should it really be there? */
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if (restconf_reply_send(req, 404, NULL) < 0)
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goto done;
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retval = 0;
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done:
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#else
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char *path;
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cbuf *cb = NULL;
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/* Create body */
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if ((cb = cbuf_new()) == NULL){
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clicon_err(OE_UNIX, errno, "cbuf_new");
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goto done;
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}
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path = restconf_param_get("REQUEST_URI", r->envp);
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if (restconf_reply_header(req, "Content-Type", "text/html") < 0)
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goto done;
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cprintf(cb, "The requested URL %s was not found on this server.\n", path);
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if (restconf_reply_send(req, 404, cb) < 0)
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goto done;
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retval = 0;
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done:
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if (cb)
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cbuf_free(cb);
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#endif
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return retval;
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}
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/*! HTTP error 405
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* @param[in] req Generic Www handle
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* @param[in] allow Which methods are allowed
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*/
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int
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restconf_method_notallowed(void *req,
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char *allow)
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{
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int retval = -1;
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if (restconf_reply_header(req, "Allow", "%s", allow) < 0)
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goto done;
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if (restconf_reply_send(req, 405, NULL) < 0)
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goto done;
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retval = 0;
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done:
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return retval;
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}
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/*! HTTP error 406 Not acceptable
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* @param[in] h Clicon handle
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* @param[in] req Generic Www handle
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*/
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int
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restconf_notacceptable(clicon_handle h,
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void *req)
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{
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int retval = -1;
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#ifdef SKIP_BODY /* Remove the body - should it really be there? */
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if (restconf_reply_send(req, 406, NULL) < 0)
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goto done;
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retval = 0;
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done:
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#else
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char *path;
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cbuf *cb = NULL;
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/* Create body */
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if ((cb = cbuf_new()) == NULL){
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clicon_err(OE_UNIX, errno, "cbuf_new");
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goto done;
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}
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path = restconf_param_get("REQUEST_URI", r->envp);
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if (restconf_reply_header(req, "Content-Type", "text/html") < 0)
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goto done;
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cprintf(cb, "The target resource does not have a current representation that would be acceptable to the user agent.\n", path);
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if (restconf_reply_send(req, 406, cb) < 0)
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goto done;
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retval = 0;
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done:
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if (cb)
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cbuf_free(cb);
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#endif
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return retval;
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}
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/*! HTTP error 409
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* @param[in] req Generic Www handle
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*/
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int
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restconf_conflict(void *req)
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{
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int retval = -1;
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if (restconf_reply_send(req, 409, NULL) < 0)
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goto done;
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retval = 0;
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done:
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return retval;
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}
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/*! HTTP error 409 Unsupporte dmedia
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* @param[in] req Generic Www handle
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*/
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int
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restconf_unsupported_media(void *req)
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{
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int retval = -1;
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if (restconf_reply_send(req, 415, NULL) < 0)
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goto done;
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retval = 0;
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done:
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return retval;
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}
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/*! HTTP error 500 Internal server error
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* @param[in] h Clicon handle
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* @param[in] req Generic Www handle
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*/
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int
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restconf_internal_server_error(clicon_handle h,
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void *req)
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{
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int retval = -1;
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#ifdef SKIP_BODY /* Remove the body - should it really be there? */
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if (restconf_reply_send(req, 500, NULL) < 0)
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goto done;
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retval = 0;
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done:
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#else
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char *path;
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cbuf *cb = NULL;
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/* Create body */
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if ((cb = cbuf_new()) == NULL){
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clicon_err(OE_UNIX, errno, "cbuf_new");
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goto done;
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}
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path = restconf_param_get("REQUEST_URI", r->envp);
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if (restconf_reply_header(req, "Content-Type", "text/html") < 0)
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goto done;
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cprintf(cb, "Internal server error when accessing %s</h1>\n", path);
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if (restconf_reply_send(req, 500, cb) < 0)
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goto done;
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retval = 0;
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done:
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if (cb)
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cbuf_free(cb);
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#endif
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return retval;
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}
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/*! HTTP error 501 Not implemented
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* @param[in] req Generic Www handle
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*/
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int
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restconf_notimplemented(void *req)
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{
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int retval = -1;
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if (restconf_reply_send(req, 501, NULL) < 0)
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goto done;
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retval = 0;
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done:
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return retval;
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}
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/*! Generic restconf error function on get/head request
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* @param[in] h Clixon handle
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* @param[in] req Generic Www handle
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* @param[in] xerr XML error message from backend
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* @param[in] pretty Set to 1 for pretty-printed xml/json output
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* @param[in] media Output media
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* @param[in] code If 0 use rfc8040 sec 7 netconf2restconf error-tag mapping
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* otherwise use this code
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*/
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int
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api_return_err(clicon_handle h,
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void *req,
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cxobj *xerr,
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int pretty,
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restconf_media media,
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int code0)
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{
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int retval = -1;
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cbuf *cb = NULL;
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cbuf *cberr = NULL;
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cxobj *xtag;
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char *tagstr;
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int code;
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cxobj *xerr2 = NULL;
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clicon_debug(1, "%s", __FUNCTION__);
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if ((cb = cbuf_new()) == NULL){
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clicon_err(OE_UNIX, errno, "cbuf_new");
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goto done;
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}
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/* A well-formed error message when entering here should look like:
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* <rpc-error>...<error-tag>invalid-value</error-tag>
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* Check this is so, otherwise generate an internal error.
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*/
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if (strcmp(xml_name(xerr), "rpc-error") != 0 ||
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(xtag = xpath_first(xerr, NULL, "error-tag")) == NULL){
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if ((cberr = cbuf_new()) == NULL){
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clicon_err(OE_UNIX, errno, "cbuf_new");
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goto done;
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}
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cprintf(cberr, "Internal error, system returned invalid error message: ");
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if (netconf_err2cb(xerr, cberr) < 0)
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goto done;
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if (netconf_operation_failed_xml(&xerr2, "application",
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cbuf_get(cberr)) < 0)
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goto done;
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if ((xerr = xpath_first(xerr2, NULL, "//rpc-error")) == NULL){
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clicon_err(OE_XML, 0, "Internal error, shouldnt happen");
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goto done;
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}
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}
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if (xml_name_set(xerr, "error") < 0)
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goto done;
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tagstr = xml_body(xtag);
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if (code0 != 0)
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code = code0;
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else{
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if ((code = restconf_err2code(tagstr)) < 0)
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code = 500; /* internal server error */
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}
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if (restconf_reply_header(req, "Content-Type", "%s", restconf_media_int2str(media)) < 0) // XXX
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goto done;
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switch (media){
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case YANG_DATA_XML:
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clicon_debug(1, "%s code:%d err:%s", __FUNCTION__, code, cbuf_get(cb));
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if (pretty){
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cprintf(cb, " <errors xmlns=\"urn:ietf:params:xml:ns:yang:ietf-restconf\">\n");
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if (clicon_xml2cbuf(cb, xerr, 2, pretty, -1) < 0)
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goto done;
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cprintf(cb, " </errors>\r\n");
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}
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else {
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cprintf(cb, "<errors xmlns=\"urn:ietf:params:xml:ns:yang:ietf-restconf\">");
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if (clicon_xml2cbuf(cb, xerr, 2, pretty, -1) < 0)
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goto done;
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cprintf(cb, "</errors>\r\n");
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}
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break;
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case YANG_DATA_JSON:
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clicon_debug(1, "%s code:%d err:%s", __FUNCTION__, code, cbuf_get(cb));
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if (pretty){
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cprintf(cb, "{\n\"ietf-restconf:errors\" : ");
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if (xml2json_cbuf(cb, xerr, pretty) < 0)
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goto done;
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cprintf(cb, "\n}\r\n");
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}
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else{
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cprintf(cb, "{");
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cprintf(cb, "\"ietf-restconf:errors\":");
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if (xml2json_cbuf(cb, xerr, pretty) < 0)
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goto done;
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cprintf(cb, "}\r\n");
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}
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break;
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default:
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clicon_err(OE_YANG, EINVAL, "Invalid media type %d", media);
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goto done;
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break;
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} /* switch media */
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if (restconf_reply_send(req, code, cb) < 0)
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goto done;
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// ok:
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retval = 0;
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done:
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clicon_debug(1, "%s retval:%d", __FUNCTION__, retval);
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if (cb)
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cbuf_free(cb);
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if (cberr)
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cbuf_free(cberr);
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return retval;
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}
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