288 lines
8.4 KiB
C
288 lines
8.4 KiB
C
/*
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*
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***** BEGIN LICENSE BLOCK *****
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Copyright (C) 2009-2019 Olof Hagsand
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Copyright (C) 2020-2021 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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* Concrete functions for openssl of the
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* Virtual clixon restconf API functions.
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* @see restconf_api.h for virtual API
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*/
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#ifdef HAVE_CONFIG_H
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#include "clixon_config.h" /* generated by config & autoconf */
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#endif
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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#ifdef HAVE_LIBEVHTP
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/* evhtp */
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#define EVHTP_DISABLE_REGEX
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#define EVHTP_DISABLE_EVTHR
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#include <evhtp/evhtp.h>
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#endif /* HAVE_LIBEVHTP */
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#ifdef HAVE_LIBNGHTTP2
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#include <nghttp2/nghttp2.h>
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#endif
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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" /* Virtual api */
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#include "restconf_native.h"
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/*! Add HTTP header field name and value to reply, evhtp specific
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* @param[in] req Evhtp http request handle
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* @param[in] name HTTP header field name
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* @param[in] vfmt HTTP header field value format string w variable parameter
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* @see eg RFC 7230
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*/
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int
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restconf_reply_header(void *req0,
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const char *name,
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const char *vfmt,
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...)
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{
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#ifdef HAVE_LIBEVHTP
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evhtp_request_t *req = (evhtp_request_t *)req0;
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int retval = -1;
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size_t vlen;
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char *value = NULL;
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va_list ap;
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evhtp_connection_t *conn;
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restconf_conn_h *rc;
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if (req == NULL || name == NULL || vfmt == NULL){
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clicon_err(OE_CFG, EINVAL, "req, name or value is NULL");
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return -1;
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}
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va_start(ap, vfmt);
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vlen = vsnprintf(NULL, 0, vfmt, ap);
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va_end(ap);
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/* allocate value string exactly fitting */
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if ((value = malloc(vlen+1)) == NULL){
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clicon_err(OE_UNIX, errno, "malloc");
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goto done;
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}
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/* second round: compute actual value */
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va_start(ap, vfmt);
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if (vsnprintf(value, vlen+1, vfmt, ap) < 0){
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clicon_err(OE_UNIX, errno, "vsnprintf");
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va_end(ap);
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goto done;
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}
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va_end(ap);
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if ((conn = evhtp_request_get_connection(req)) == NULL){
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clicon_err(OE_DAEMON, EFAULT, "evhtp_request_get_connection");
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goto done;
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}
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if ((rc = conn->arg) == NULL){
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clicon_err(OE_RESTCONF, EFAULT, "Internal error: restconf-conn-h is NULL: shouldnt happen");
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goto done;
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}
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if (cvec_add_string(rc->rc_outp_hdrs, (char*)name, value) < 0){
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clicon_err(OE_RESTCONF, errno, "cvec_add_string");
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goto done;
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}
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retval = 0;
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done:
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if (value)
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free(value);
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return retval;
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#else /* HAVE_LIBEVHTP */
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return 0;
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#endif /* HAVE_LIBEVHTP */
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}
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#ifdef HAVE_LIBEVHTP
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/*! Send reply
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* @see htp__create_reply_
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*/
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#define rc_parser conn->parser /* XXX */
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static int
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native_send_reply(restconf_conn_h *rc,
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evhtp_request_t *request,
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evhtp_res code)
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{
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int retval = -1;
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unsigned char major;
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unsigned char minor;
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cg_var *cv;
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switch (request->proto) {
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case EVHTP_PROTO_10:
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if (request->flags & EVHTP_REQ_FLAG_KEEPALIVE) {
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/* protocol is HTTP/1.0 and clients wants to keep established */
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if (restconf_reply_header(request, "Connection", "keep-alive") < 0)
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goto done;
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}
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major = htparser_get_major(request->rc_parser); /* XXX Look origin */
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minor = htparser_get_minor(request->rc_parser);
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break;
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case EVHTP_PROTO_11:
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if (!(request->flags & EVHTP_REQ_FLAG_KEEPALIVE)) {
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/* protocol is HTTP/1.1 but client wanted to close */
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if (restconf_reply_header(request, "Connection", "keep-alive") < 0)
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goto done;
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}
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major = htparser_get_major(request->rc_parser);
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minor = htparser_get_minor(request->rc_parser);
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break;
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default:
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/* this sometimes happens when a response is made but paused before
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* the method has been parsed */
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major = 1;
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minor = 0;
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break;
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}
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cprintf(rc->rc_outp_buf, "HTTP/%u.%u %u %s\r\n", major, minor, code, restconf_code2reason(code));
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/* Loop over headers */
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cv = NULL;
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while ((cv = cvec_each(rc->rc_outp_hdrs, cv)) != NULL)
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cprintf(rc->rc_outp_buf, "%s: %s\r\n", cv_name_get(cv), cv_string_get(cv));
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cprintf(rc->rc_outp_buf, "\r\n");
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// cvec_reset(rc->rc_outp_hdrs); /* Is now done in restconf_connection but can be done here */
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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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#endif /* HAVE_LIBEVHTP */
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/*! Send HTTP reply with potential message body
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* @param[in] req Evhtp http request handle
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* @param[in] cb Body as a cbuf, send if
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*
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* Prerequisites: status code set, headers given, body if wanted set
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*/
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int
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restconf_reply_send(void *req0,
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int code,
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cbuf *cb)
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{
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#ifdef HAVE_LIBEVHTP
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evhtp_request_t *req = (evhtp_request_t *)req0;
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int retval = -1;
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const char *reason_phrase;
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evhtp_connection_t *conn;
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restconf_conn_h *rc;
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clicon_debug(1, "%s code:%d", __FUNCTION__, code);
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req->status = code;
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if ((reason_phrase = restconf_code2reason(code)) == NULL)
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reason_phrase="";
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#if 0 /* XXX remove status header for evhtp? */
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if (restconf_reply_header(req, "Status", "%d %s", code, reason_phrase) < 0)
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goto done;
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#endif
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if ((conn = evhtp_request_get_connection(req)) == NULL){
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clicon_err(OE_DAEMON, EFAULT, "evhtp_request_get_connection");
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goto done;
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}
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/* If body, add a content-length header
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* A server MUST NOT send a Content-Length header field in any response
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* with a status code of 1xx (Informational) or 204 (No Content). A
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* server MUST NOT send a Content-Length header field in any 2xx
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* (Successful) response to a CONNECT request (Section 4.3.6 of
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* [RFC7231]).
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*/
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if (cb != NULL && cbuf_len(cb)){
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cprintf(cb, "\r\n");
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if (restconf_reply_header(req, "Content-Length", "%d", cbuf_len(cb)) < 0)
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goto done;
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}
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else
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if (restconf_reply_header(req, "Content-Length", "0") < 0)
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goto done;
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if ((rc = conn->arg) == NULL){
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clicon_err(OE_RESTCONF, EFAULT, "Internal error: restconf-conn-h is NULL: shouldnt happen");
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goto done;
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}
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/* Create reply and write headers */
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if (native_send_reply(rc, req, code) < 0)
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goto done;
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req->flags |= EVHTP_REQ_FLAG_FINISHED; /* Signal to evhtp to read next request */
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/* Write a body if cbuf is nonzero */
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if (cb != NULL && cbuf_len(cb)){
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cprintf(rc->rc_outp_buf, "%s", cbuf_get(cb));
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}
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retval = 0;
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done:
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return retval;
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#else /* HAVE_LIBEVHTP */
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return 0;
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#endif /* HAVE_LIBEVHTP */
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}
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/*! get input data
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* @param[in] req Fastcgi request handle
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* @note Pulls up an event buffer and then copies it to a cbuf. This is not efficient.
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*/
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cbuf *
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restconf_get_indata(void *req0)
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{
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cbuf *cb = NULL;
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#ifdef HAVE_LIBEVHTP
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evhtp_request_t *req = (evhtp_request_t *)req0;
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size_t len;
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unsigned char *buf;
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if ((cb = cbuf_new()) == NULL)
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return NULL;
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len = evbuffer_get_length(req->buffer_in);
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if (len > 0){
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if ((buf = evbuffer_pullup(req->buffer_in, len)) == NULL){
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clicon_err(OE_CFG, errno, "evbuffer_pullup");
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return NULL;
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}
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/* Note the pullup may not be null-terminated */
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cbuf_append_buf(cb, buf, len);
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}
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return cb;
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#else /* HAVE_LIBEVHTP */
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return cb;
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#endif /* HAVE_LIBEVHTP */
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}
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