255 lines
7.6 KiB
C
255 lines
7.6 KiB
C
/*
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*
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***** BEGIN LICENSE BLOCK *****
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Copyright (C) 2020-2024 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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* nghttp2 callback mechanism
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*
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* nghttp2_session_mem_recv()
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* on_begin_headers_callback()
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* create sd
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* on_header_callback() NGHTTP2_HEADERS
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* translate all headers
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* on_data_chunk_recv_callback
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* get indata
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* on_frame_recv_callback NGHTTP2_FLAG_END_STREAM
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* get method and call handler
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* create rr
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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 <syslog.h>
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#include <pwd.h>
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#include <ctype.h>
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#include <assert.h>
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#include <signal.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <sys/resource.h>
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#include <openssl/ssl.h>
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#include <openssl/rand.h>
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#include <openssl/err.h>
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#include <openssl/x509v3.h>
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/* cligen */
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#include <cligen/cligen.h>
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/* clixon */
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#include <clixon/clixon.h>
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#ifdef HAVE_LIBNGHTTP2
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#include <nghttp2/nghttp2.h>
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#endif
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/* restconf */
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#include "restconf_lib.h" /* generic shared with plugins */
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#include "restconf_handle.h"
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#include "restconf_api.h" /* generic not shared with plugins */
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#include "restconf_err.h"
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#include "restconf_root.h"
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#include "restconf_native.h" /* Restconf-openssl mode specific headers*/
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#include "restconf_stream.h"
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/*! Callback when stream notifications arrive from backend
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*
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* @param[in] s Socket
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* @param[in] req Generic Www handle (can be part of clixon handle)
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* @retval 0 OK
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* @retval -1 Error
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* @see netconf_notification_cb
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*/
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static int
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stream_native_backend_cb(int s,
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void *arg)
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{
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int retval = -1;
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restconf_stream_data *sd = (restconf_stream_data *)arg;
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int eof;
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cxobj *xtop = NULL; /* top xml */
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cxobj *xn; /* notification xml */
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cbuf *cbx = NULL;
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cbuf *cb = NULL;
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cbuf *cbmsg = NULL;
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int pretty = 0;
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int ret;
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restconf_conn *rc = sd->sd_conn;
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clixon_handle h = rc->rc_h;
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clixon_debug(CLIXON_DBG_STREAM|CLIXON_DBG_DETAIL, "");
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pretty = restconf_pretty_get(h);
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if (clixon_msg_rcv11(s, NULL, 0, &cbmsg, &eof) < 0)
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goto done;
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clixon_debug(CLIXON_DBG_STREAM, "%s", cbuf_get(cbmsg));
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/* handle close from remote end: this will exit the client */
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if (eof){
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clixon_debug(CLIXON_DBG_STREAM, "eof");
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restconf_close_ssl_socket(rc, __FUNCTION__, 0);
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goto ok;
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}
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if ((ret = clixon_xml_parse_string(cbuf_get(cbmsg), YB_NONE, NULL, &xtop, NULL)) < 0)
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goto done;
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if (ret == 0){
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clixon_err(OE_XML, EFAULT, "Invalid notification");
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goto done;
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}
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/* create event */
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if ((cb = cbuf_new()) == NULL){
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clixon_err(OE_PLUGIN, errno, "cbuf_new");
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goto done;
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}
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if ((cbx = cbuf_new()) == NULL){
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clixon_err(OE_PLUGIN, errno, "cbuf_new");
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goto done;
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}
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if ((xn = xpath_first(xtop, NULL, "notification")) == NULL)
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goto ok;
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#if 0 // Cant get CHUNKED to work
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{
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size_t len;
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cprintf(cbx, "data: ");
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if (clixon_xml2cbuf(cbx, xn, 0, pretty, NULL, -1, 0) < 0)
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goto done;
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len = cbuf_len(cbx);
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len +=2;
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cprintf(cb, "%x", (int16_t)len&0xffff);
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cprintf(cb, "\r\n");
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cprintf(cb, "%s", cbuf_get(cbx));
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cprintf(cb, "\r\n");
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cprintf(cb, "\r\n");
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cprintf(cb, "0\r\n");
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cprintf(cb, "\r\n");
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// XXX This terminates stream, but want it to continue / hang
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}
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#else
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cprintf(cb, "data: ");
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if (clixon_xml2cbuf(cb, xn, 0, pretty, NULL, -1, 0) < 0)
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goto done;
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cprintf(cb, "\r\n");
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cprintf(cb, "\r\n");
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#endif
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if ((ret = native_buf_write(h, cbuf_get(cb), cbuf_len(cb), rc, "native stream")) < 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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clixon_debug(CLIXON_DBG_STREAM|CLIXON_DBG_DETAIL, "retval: %d", retval);
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if (xtop != NULL)
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xml_free(xtop);
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if (cbmsg)
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cbuf_free(cbmsg);
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if (cb)
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cbuf_free(cb);
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if (cbx)
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cbuf_free(cbx);
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return retval;
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}
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/*! Timeout of notification stream, limit lifetime, for debug
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*/
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static int
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stream_timeout_end(int s,
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void *arg)
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{
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restconf_conn *rc = (restconf_conn *)arg;
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clixon_debug(CLIXON_DBG_STREAM, "");
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return restconf_close_ssl_socket(rc, __FUNCTION__, 0);
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}
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/*! Close notification stream
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*
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* Only stream aspects, to close full socket, call eg restconf_close_ssl_socket
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*/
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int
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stream_close(clixon_handle h,
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void *req)
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{
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restconf_conn *rc = (restconf_conn *)req;
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clicon_rpc_close_session(h);
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clixon_event_unreg_fd(rc->rc_event_stream, stream_native_backend_cb);
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clixon_event_unreg_timeout(stream_timeout_end, req);
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close(rc->rc_event_stream);
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rc->rc_event_stream = 0;
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return 0;
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}
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/*! Native specific code for setting up stream sockets
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*
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* @param[in] h Clixon handle
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* @param[in] req Generic Www handle (can be part of clixon handle)
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* @param[in] timeout Stream timeout
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* @param[in] besock Socket to backend
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* @param[out] finish Set to zero, if request should not be finnished by upper layer
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* @retval 0 OK
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* @retval -1 Error
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* Consider moving timeout and backend sock to generic code
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*/
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int
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stream_sockets_setup(clixon_handle h,
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void *req,
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int timeout,
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int besock,
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int *finish)
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{
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int retval = -1;
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restconf_stream_data *sd = (restconf_stream_data *)req;
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restconf_conn *rc;
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/* Listen to backend socket */
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if (clixon_event_reg_fd(besock,
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stream_native_backend_cb,
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req,
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"stream socket") < 0)
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goto done;
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rc = sd->sd_conn;
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rc->rc_event_stream = besock;
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/* Timeout of notification stream, close after limited lifetime, for debug */
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if (timeout){
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struct timeval t;
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gettimeofday(&t, NULL);
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t.tv_sec += timeout;
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clixon_event_reg_timeout(t, stream_timeout_end, rc, "Stream timeout");
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}
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retval = 0;
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done:
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clixon_debug(CLIXON_DBG_STREAM, "retval:%d", retval);
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return retval;
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}
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