688 lines
18 KiB
C
688 lines
18 KiB
C
/*
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*
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***** BEGIN LICENSE BLOCK *****
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Copyright (C) 2009-2017 Olof Hagsand and Benny Holmgren
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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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* Client-side functions for clicon_proto protocol
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* Historically this code was part of the clicon_cli application. But
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* it should (is?) be general enough to be used by other applications.
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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 <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <sys/syslog.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_queue.h"
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#include "clixon_chunk.h"
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#include "clixon_log.h"
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#include "clixon_hash.h"
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#include "clixon_handle.h"
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#include "clixon_yang.h"
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#include "clixon_options.h"
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#include "clixon_xml.h"
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#include "clixon_xsl.h"
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#include "clixon_proto.h"
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#include "clixon_err.h"
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#include "clixon_proto_encode.h"
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#include "clixon_proto_client.h"
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/*! Internal rpc function
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* @param[in] h CLICON handle
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* @param[in] msg Encoded message. Deallocate woth free
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* @param[out] xret Return value from backend as netconf xml tree. Free w xml_free
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* @param[inout] sock0 If pointer exists, do not close socket to backend on success
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* and return it here. For keeping a notify socket open
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* Note: sock0 is if connection should be persistent, like a notification/subscribe api
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*/
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int
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clicon_rpc_msg(clicon_handle h,
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struct clicon_msg *msg,
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cxobj **xret0,
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int *sock0)
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{
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int retval = -1;
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char *sock;
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int port;
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char *retdata = NULL;
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cxobj *xret = NULL;
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cxobj *x;
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uint32_t err;
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uint32_t suberr;
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char *errmsg = NULL;
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char *etype = NULL;
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if ((sock = clicon_sock(h)) == NULL){
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clicon_err(OE_FATAL, 0, "CLICON_SOCK option not set");
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goto done;
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}
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/* What to do if inet socket? */
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switch (clicon_sock_family(h)){
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case AF_UNIX:
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if (clicon_rpc_connect_unix(msg, sock, &retdata, sock0) < 0){
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#if 0
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if (errno == ESHUTDOWN)
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/* Maybe could reconnect on a higher layer, but lets fail
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loud and proud */
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cli_set_exiting(1);
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#endif
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goto done;
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}
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break;
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case AF_INET:
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if ((port = clicon_sock_port(h)) < 0){
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clicon_err(OE_FATAL, 0, "CLICON_SOCK option not set");
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goto done;
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}
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if (port < 0){
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clicon_err(OE_FATAL, 0, "CLICON_SOCK_PORT not set");
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goto done;
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}
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if (clicon_rpc_connect_inet(msg, sock, port, &retdata, sock0) < 0)
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goto done;
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break;
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}
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#if 1 /* Parse return data and intercept clixon errors */
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if (retdata) {
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if (clicon_xml_parse_str(retdata, &xret) < 0)
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goto done;
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if (xpath_first(xret, "/rpc-reply/ok") != NULL ||
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xpath_first(xret, "/rpc-reply/data") != NULL)
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;
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else if (xpath_first(xret, "/rpc-reply/rpc-error") != NULL){
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if ((x=xpath_first(xret, "//error-type"))!=NULL)
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etype = xml_body(x);
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if (etype&&strcmp(etype, "clixon")==0){
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if ((x=xpath_first(xret, "//error-tag"))!=NULL)
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err = atoi(xml_body(x));
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if ((x=xpath_first(xret, "//error-message"))!=NULL)
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suberr = atoi(xml_body(x));
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if ((x=xpath_first(xret, "//error-info"))!=NULL)
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errmsg = xml_body(x);
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if (debug)
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clicon_err(err, suberr, "%s msgtype:%hu", errmsg, ntohs(msg->op_type));
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else
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clicon_err(err, suberr, "%s", errmsg);
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goto done;
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}
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}
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else{
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clicon_err(OE_PROTO, 0, "%s: unexpected reply",
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__FUNCTION__);
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}
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}
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#endif
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if (xret0){
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*xret0 = xret;
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xret = NULL;
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}
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retval = 0;
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done:
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if (retdata)
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free(retdata);
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if (xret)
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xml_free(xret);
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return retval;
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}
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/*! Generic xml netconf clicon rpc
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* Want to go over to use netconf directly between client and server,...
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* @param[in] h clicon handle
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* @param[in] xi XML netconf tree
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* @param[out] xret Return XML, error or OK
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* @param[out] sp Socket pointer for notification, otherwise NULL
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*/
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int
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clicon_rpc_netconf_xml(clicon_handle h,
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cxobj *xin,
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cxobj **xret,
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int *sp)
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{
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int retval = -1;
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struct clicon_msg *msg = NULL;
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if ((msg = clicon_msg_netconf_encode_xml(xin)) == NULL)
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goto done;
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if (clicon_rpc_msg(h, msg, xret, sp) < 0)
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goto done;
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retval = 0;
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done:
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if (msg)
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free(msg);
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return retval;
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}
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int
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clicon_rpc_generate_error(cxobj *xerr)
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{
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cxobj *x;
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char *etype="";
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char *etag="";
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char *emsg="";
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char *einfo="";
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if ((x=xpath_first(xerr, "error-type"))!=NULL)
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etype = xml_body(x);
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if ((x=xpath_first(xerr, "error-tag"))!=NULL)
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etag = xml_body(x);
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if ((x=xpath_first(xerr, "error-message"))!=NULL)
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emsg = xml_body(x);
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if ((x=xpath_first(xerr, "error-info"))!=NULL)
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einfo = xml_body(x);
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clicon_err(OE_XML, 0, "%s %s %s %s", etype, etag, emsg, einfo);
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return 0;
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}
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/*! Get database configuration
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* Same as clicon_proto_change just with a cvec instead of lvec
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* @param[in] h CLICON handle
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* @param[in] db Name of database
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* @param[in] xpath XPath (or "")
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* @param[out] xt XML tree. must be freed by caller with xml_free
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* @retval 0 OK
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* @retval -1 Error, fatal or xml
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* @code
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* cxobj *xt = NULL;
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* if (clicon_rpc_get_config(h, "running", "/", &xt) < 0)
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* err;
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* if (xt)
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* xml_free(xt);
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* @endcode
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*/
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int
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clicon_rpc_get_config(clicon_handle h,
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char *db,
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char *xpath,
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cxobj **xt)
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{
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int retval = -1;
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struct clicon_msg *msg = NULL;
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cbuf *cb = NULL;
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cxobj *xret = NULL;
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cxobj *xerr;
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cxobj *xd;
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if ((cb = cbuf_new()) == NULL)
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goto done;
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cprintf(cb, "<rpc><get-config><source><%s/></source>", db);
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if (xpath && strlen(xpath))
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cprintf(cb, "<filter type=\"xpath\" select=\"%s\"/>", xpath);
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cprintf(cb, "</get-config></rpc>");
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if ((msg = clicon_msg_netconf_encode(cbuf_get(cb))) == NULL)
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goto done;
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if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)
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goto done;
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if ((xerr = xpath_first(xret, "//rpc-error")) != NULL){
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clicon_rpc_generate_error(xerr);
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goto done;
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}
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if ((xd = xpath_first(xret, "//data/config")) == NULL)
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if ((xd = xml_new("config", NULL)) == NULL)
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goto done;
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if (xt){
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if (xml_rm(xd) < 0)
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goto done;
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*xt = xd;
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}
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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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if (xret)
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xml_free(xret);
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if (msg)
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free(msg);
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return retval;
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}
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/*! Send database entries as XML to backend daemon
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* Same as clicon_proto_change just with a cvec instead of lvec
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* @param[in] h CLICON handle
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* @param[in] db Name of database
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* @param[in] op Operation on database item: OP_MERGE, OP_REPLACE
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* @param[in] api_path restconf API Path (or "")
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* @param[in] xml XML string. Ex: <a>..</a><b>...</b>
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* @retval 0 OK
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* @retval -1 Error
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* @code
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* if (clicon_rpc_edit_config(h, "running", OP_MERGE, "/",
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* "<config><a>4</a></config>") < 0)
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* err;
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* @endcode
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*/
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int
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clicon_rpc_edit_config(clicon_handle h,
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char *db,
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enum operation_type op,
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char *api_path,
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char *xml)
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{
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int retval = -1;
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struct clicon_msg *msg = NULL;
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cbuf *cb = NULL;
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cxobj *xret = NULL;
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cxobj *xerr;
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if ((cb = cbuf_new()) == NULL)
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goto done;
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cprintf(cb, "<rpc><edit-config><target><%s/></target>", db);
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cprintf(cb, "<default-operation>%s</default-operation>",
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xml_operation2str(op));
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if (api_path && strlen(api_path))
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cprintf(cb, "<filter type=\"restconf\" select=\"%s\"/>", api_path);
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if (xml)
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cprintf(cb, "%s", xml);
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cprintf(cb, "</edit-config></rpc>");
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if ((msg = clicon_msg_netconf_encode(cbuf_get(cb))) == NULL)
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goto done;
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if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)
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goto done;
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if ((xerr = xpath_first(xret, "//rpc-error")) != NULL){
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clicon_rpc_generate_error(xerr);
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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 (xret)
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xml_free(xret);
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if (cb)
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cbuf_free(cb);
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if (msg)
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free(msg);
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return retval;
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}
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/*! Send a request to backend to copy a file from one location to another
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* Note this assumes the backend can access these files and (usually) assumes
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* clients and servers have the access to the same filesystem.
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* @param[in] h CLICON handle
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* @param[in] db1 src database, eg "running"
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* @param[in] db2 dst database, eg "startup"
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* @code
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* if (clicon_rpc_copy_config(h, "running", "startup") < 0)
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* err;
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* @endcode
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*/
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int
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clicon_rpc_copy_config(clicon_handle h,
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char *db1,
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char *db2)
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{
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int retval = -1;
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struct clicon_msg *msg = NULL;
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cxobj *xret = NULL;
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cxobj *xerr;
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if ((msg = clicon_msg_netconf_encode("<rpc><copy-config><source><%s/></source><target><%s/></target></copy-config></rpc>", db1, db2)) == NULL)
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goto done;
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if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)
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goto done;
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if ((xerr = xpath_first(xret, "//rpc-error")) != NULL){
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clicon_rpc_generate_error(xerr);
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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 (xret)
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xml_free(xret);
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if (msg)
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free(msg);
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return retval;
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}
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/*! Send a request to backend to delete a config database
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* @param[in] h CLICON handle
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* @param[in] db database, eg "running"
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* @code
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* if (clicon_rpc_delete_config(h, "startup") < 0)
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* err;
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* @endcode
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*/
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int
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clicon_rpc_delete_config(clicon_handle h,
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char *db)
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{
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int retval = -1;
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struct clicon_msg *msg = NULL;
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cxobj *xret = NULL;
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cxobj *xerr;
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if ((msg = clicon_msg_netconf_encode("<rpc><delete-config><target><%s/></target></delete-config></rpc>", db)) == NULL)
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goto done;
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if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)
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goto done;
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if ((xerr = xpath_first(xret, "//rpc-error")) != NULL){
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clicon_rpc_generate_error(xerr);
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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 (xret)
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xml_free(xret);
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if (msg)
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free(msg);
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return retval;
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}
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int
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clicon_rpc_lock(clicon_handle h,
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char *db)
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{
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int retval = -1;
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struct clicon_msg *msg = NULL;
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cxobj *xret = NULL;
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cxobj *xerr;
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if ((msg = clicon_msg_netconf_encode("<rpc><lock><target><%s/></target></lock></rpc>", db)) == NULL)
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goto done;
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if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)
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goto done;
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if ((xerr = xpath_first(xret, "//rpc-error")) != NULL){
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clicon_rpc_generate_error(xerr);
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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 (xret)
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xml_free(xret);
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if (msg)
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free(msg);
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return retval;
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}
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int
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clicon_rpc_unlock(clicon_handle h,
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char *db)
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{
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int retval = -1;
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struct clicon_msg *msg = NULL;
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cxobj *xret = NULL;
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cxobj *xerr;
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if ((msg = clicon_msg_netconf_encode("<rpc><unlock><target><%s/></target></unlock></rpc>", db)) == NULL)
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goto done;
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if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)
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goto done;
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if ((xerr = xpath_first(xret, "//rpc-error")) != NULL){
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clicon_rpc_generate_error(xerr);
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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 (xret)
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xml_free(xret);
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if (msg)
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free(msg);
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return retval;
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}
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int
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clicon_rpc_close_session(clicon_handle h)
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{
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int retval = -1;
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struct clicon_msg *msg = NULL;
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cxobj *xret = NULL;
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cxobj *xerr;
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if ((msg = clicon_msg_netconf_encode("<rpc><close-session/></rpc>")) == NULL)
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goto done;
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if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)
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goto done;
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if ((xerr = xpath_first(xret, "//rpc-error")) != NULL){
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clicon_rpc_generate_error(xerr);
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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 (xret)
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xml_free(xret);
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if (msg)
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free(msg);
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return retval;
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}
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int
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clicon_rpc_kill_session(clicon_handle h,
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int session_id)
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{
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int retval = -1;
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struct clicon_msg *msg = NULL;
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cxobj *xret = NULL;
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cxobj *xerr;
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if ((msg = clicon_msg_netconf_encode("<rpc><kill-session><session-id>%d</session-id></kill-session></rpc>", session_id)) == NULL)
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goto done;
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if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)
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goto done;
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if ((xerr = xpath_first(xret, "//rpc-error")) != NULL){
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clicon_rpc_generate_error(xerr);
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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 (xret)
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xml_free(xret);
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if (msg)
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free(msg);
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return retval;
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}
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|
|
|
|
|
/*! Send validate request to backend daemon
|
|
* @param[in] h CLICON handle
|
|
* @param[in] db Name of database
|
|
* @retval 0 OK
|
|
*/
|
|
int
|
|
clicon_rpc_validate(clicon_handle h,
|
|
char *db)
|
|
{
|
|
int retval = -1;
|
|
struct clicon_msg *msg = NULL;
|
|
cxobj *xret = NULL;
|
|
cxobj *xerr;
|
|
cxobj *x;
|
|
|
|
if ((msg = clicon_msg_netconf_encode("<rpc><validate><source><%s/></source></validate></rpc>", db)) == NULL)
|
|
goto done;
|
|
if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)
|
|
goto done;
|
|
if ((xerr = xpath_first(xret, "//rpc-error")) != NULL){
|
|
x=xpath_first(xerr, "error-message");
|
|
clicon_log(LOG_ERR, "Validate failed: \"%s\". Edit and try again or discard changes", x?xml_body(x):"");
|
|
goto done;
|
|
}
|
|
retval = 0;
|
|
done:
|
|
if (msg)
|
|
free(msg);
|
|
if (xret)
|
|
xml_free(xret);
|
|
return retval;
|
|
}
|
|
|
|
/*! Commit changes send a commit request to backend daemon
|
|
* @param[in] h CLICON handle
|
|
* @param[in] from name of 'from' database (eg "candidate")
|
|
* @param[in] db name of 'to' database (eg "running")
|
|
* @retval 0 OK
|
|
*/
|
|
int
|
|
clicon_rpc_commit(clicon_handle h)
|
|
{
|
|
int retval = -1;
|
|
struct clicon_msg *msg = NULL;
|
|
cxobj *xret = NULL;
|
|
cxobj *xerr;
|
|
|
|
if ((msg = clicon_msg_netconf_encode("<rpc><commit/></rpc>")) == NULL)
|
|
goto done;
|
|
if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)
|
|
goto done;
|
|
if ((xerr = xpath_first(xret, "//rpc-error")) != NULL){
|
|
clicon_rpc_generate_error(xerr);
|
|
goto done;
|
|
}
|
|
retval = 0;
|
|
done:
|
|
if (xret)
|
|
xml_free(xret);
|
|
if (msg)
|
|
free(msg);
|
|
return retval;
|
|
}
|
|
|
|
/*! Create a new notification subscription
|
|
* @param[in] h Clicon handle
|
|
* @param{in] stream name of notificatio/log stream (CLICON is predefined)
|
|
* @param{in] filter message filter, eg xpath for xml notifications
|
|
* @param[out] s0 socket returned where notification mesages will appear
|
|
* @note When using netconf create-subsrciption,status and format is not supported
|
|
*/
|
|
int
|
|
clicon_rpc_create_subscription(clicon_handle h,
|
|
char *stream,
|
|
char *filter,
|
|
int *s0)
|
|
{
|
|
int retval = -1;
|
|
struct clicon_msg *msg = NULL;
|
|
cxobj *xret = NULL;
|
|
cxobj *xerr;
|
|
|
|
if ((msg = clicon_msg_netconf_encode("<rpc><create-subscription>"
|
|
"<stream>%s</stream>"
|
|
"<filter>%s</filter>"
|
|
"</create-subscription></rpc>",
|
|
stream?stream:"", filter?filter:"")) == NULL)
|
|
goto done;
|
|
if (clicon_rpc_msg(h, msg, &xret, s0) < 0)
|
|
goto done;
|
|
if ((xerr = xpath_first(xret, "//rpc-error")) != NULL){
|
|
clicon_rpc_generate_error(xerr);
|
|
goto done;
|
|
}
|
|
retval = 0;
|
|
done:
|
|
if (xret)
|
|
xml_free(xret);
|
|
if (msg)
|
|
free(msg);
|
|
return retval;
|
|
}
|
|
|
|
/*! Send database change request to backend daemon, variant for xmldb
|
|
* Same as clicon_proto_change just with a string
|
|
* @param[in] h CLICON handle
|
|
* @param[in] db Name of database
|
|
* @param[in] op Operation on database item: set, delete, (merge?)
|
|
* @param[in] key Database key
|
|
* @param[in] value value as string
|
|
* @retval 0 OK
|
|
* @retval -1 Error
|
|
* @note special case: remove all: key:"/" op:OP_REMOVE
|
|
*/
|
|
int
|
|
clicon_rpc_change(clicon_handle h,
|
|
char *db,
|
|
enum operation_type op,
|
|
char *key,
|
|
char *val)
|
|
{
|
|
int retval = -1;
|
|
struct clicon_msg *msg = NULL;
|
|
|
|
if ((msg = clicon_msg_change_encode(db,
|
|
op,
|
|
key,
|
|
val,
|
|
val?strlen(val)+1:0)) == NULL)
|
|
goto done;
|
|
if (clicon_rpc_msg(h, msg, NULL, NULL) < 0)
|
|
goto done;
|
|
retval = 0;
|
|
done:
|
|
if (msg)
|
|
free(msg);
|
|
return retval;
|
|
}
|
|
|
|
|
|
/*! Send a debug request to backend server
|
|
* @param[in] h CLICON handle
|
|
* @param[in] level Debug level
|
|
*/
|
|
int
|
|
clicon_rpc_debug(clicon_handle h,
|
|
int level)
|
|
{
|
|
int retval = -1;
|
|
struct clicon_msg *msg = NULL;
|
|
cxobj *xret = NULL;
|
|
cxobj *xerr;
|
|
|
|
if ((msg = clicon_msg_netconf_encode("<rpc><debug><level>%d</level></debug></rpc>", level)) == NULL)
|
|
goto done;
|
|
if (clicon_rpc_msg(h, msg, &xret, NULL) < 0)
|
|
goto done;
|
|
if ((xerr = xpath_first(xret, "//rpc-error")) != NULL){
|
|
clicon_rpc_generate_error(xerr);
|
|
goto done;
|
|
}
|
|
if (xpath_first(xret, "//rpc-reply/ok") == NULL){
|
|
clicon_err(OE_XML, 0, "rpc error"); /* XXX extract info from rpc-error */
|
|
goto done;
|
|
}
|
|
retval = 0;
|
|
done:
|
|
if (msg)
|
|
free(msg);
|
|
if (xret)
|
|
xml_free(xret);
|
|
return retval;
|
|
}
|
|
|