renamed .h and libs clicon->clixon
This commit is contained in:
Olof Hagsand
parent
baa5611616
commit
79b77943f9
132 changed files with 1240 additions and 1268 deletions
353
apps/backend/clixon_backend_handle.c
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353
apps/backend/clixon_backend_handle.c
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/*
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*
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Copyright (C) 2009-2016 Olof Hagsand and Benny Holmgren
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This file is part of CLIXON.
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CLIXON is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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CLIXON is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with CLIXON; see the file LICENSE. If not, see
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<http://www.gnu.org/licenses/>.
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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 <stdarg.h>
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#include <string.h>
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#include <stdlib.h>
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#include <inttypes.h>
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#include <dirent.h>
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#include <errno.h>
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#include <unistd.h>
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#include <assert.h>
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#include <fnmatch.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <regex.h>
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#include <netinet/in.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 "clixon_backend_handle.h"
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#include "backend_client.h"
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#include "backend_handle.h"
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/* header part is copied from struct clicon_handle in lib/src/clicon_handle.c */
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#define CLICON_MAGIC 0x99aafabe
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#define handle(h) (assert(clicon_handle_check(h)==0),(struct backend_handle *)(h))
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/* Clicon_handle for backends.
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* First part of this is header, same for clicon_handle and cli_handle.
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* Access functions for common fields are found in clicon lib: clicon_options.[ch]
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* This file should only contain access functions for the _specific_
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* entries in the struct below.
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*/
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struct backend_handle {
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int cb_magic; /* magic (HDR)*/
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clicon_hash_t *cb_copt; /* clicon option list (HDR) */
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clicon_hash_t *cb_data; /* internal clicon data (HDR) */
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/* ------ end of common handle ------ */
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struct client_entry *cb_ce_list; /* The client list */
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int cb_ce_nr; /* Number of clients, just increment */
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struct handle_subscription *cb_subscription; /* Event subscription list */
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};
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/*! Creates and returns a clicon config handle for other CLICON API calls
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*/
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clicon_handle
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backend_handle_init(void)
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{
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return clicon_handle_init0(sizeof(struct backend_handle));
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}
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/*! Deallocates a backend handle, including all client structs
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* @Note: handle 'h' cannot be used in calls after this
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*/
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int
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backend_handle_exit(clicon_handle h)
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{
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struct client_entry *ce;
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/* only delete client structs, not close sockets, etc, see backend_client_rm */
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while ((ce = backend_client_list(h)) != NULL)
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backend_client_delete(h, ce);
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clicon_handle_exit(h); /* frees h and options */
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return 0;
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}
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/*! Notify event and distribute to all registered clients
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*
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* @param[in] h Clicon handle
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* @param[in] stream Name of event stream. CLICON is predefined as LOG stream
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* @param[in] level Event level (not used yet)
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* @param[in] event Actual message as text format
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*
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* Stream is a string used to qualify the event-stream. Distribute the
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* event to all clients registered to this backend.
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* XXX: event-log NYI.
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* @see also subscription_add()
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* @see also backend_notify_xml()
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*/
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int
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backend_notify(clicon_handle h, char *stream, int level, char *event)
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{
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struct client_entry *ce;
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struct client_subscription *su;
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struct handle_subscription *hs;
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int retval = -1;
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/* First thru all clients(sessions), and all subscriptions and find matches */
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for (ce = backend_client_list(h); ce; ce = ce->ce_next)
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for (su = ce->ce_subscription; su; su = su->su_next)
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if (strcmp(su->su_stream, stream) == 0){
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if (fnmatch(su->su_filter, event, 0) == 0)
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if (send_msg_notify(ce->ce_s, level, event) < 0)
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goto done;
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}
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/* Then go thru all global (handle) subscriptions and find matches */
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hs = NULL;
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while ((hs = subscription_each(h, hs)) != NULL){
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if (hs->hs_format != MSG_NOTIFY_TXT)
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continue;
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if (strcmp(hs->hs_stream, stream))
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continue;
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if (fnmatch(hs->hs_filter, event, 0) == 0)
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if ((*hs->hs_fn)(h, event, hs->hs_arg) < 0)
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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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return retval;
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}
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/*! Notify event and distribute to all registered clients
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*
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* @param[in] h Clicon handle
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* @param[in] stream Name of event stream. CLICON is predefined as LOG stream
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* @param[in] level Event level (not used yet)
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* @param[in] event Actual message as xml tree
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*
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* Stream is a string used to qualify the event-stream. Distribute the
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* event to all clients registered to this backend.
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* XXX: event-log NYI.
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* @see also subscription_add()
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* @see also backend_notify()
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*/
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int
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backend_notify_xml(clicon_handle h, char *stream, int level, cxobj *x)
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{
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struct client_entry *ce;
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struct client_subscription *su;
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int retval = -1;
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cbuf *cb = NULL;
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struct handle_subscription *hs;
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/* Now go thru all clients(sessions), and all subscriptions and find matches */
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for (ce = backend_client_list(h); ce; ce = ce->ce_next)
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for (su = ce->ce_subscription; su; su = su->su_next)
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if (strcmp(su->su_stream, stream) == 0){
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if (strlen(su->su_filter)==0 || xpath_first(x, su->su_filter) != NULL){
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if (cb==NULL){
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if ((cb = cbuf_new()) == NULL){
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clicon_err(OE_PLUGIN, errno, "cbuf_new");
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goto done;
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}
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if (clicon_xml2cbuf(cb, x, 0, 0) < 0)
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goto done;
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}
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if (send_msg_notify(ce->ce_s, level, cbuf_get(cb)) < 0)
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goto done;
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}
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}
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/* Then go thru all global (handle) subscriptions and find matches */
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/* XXX: x contains name==dk-ore, but filter is
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id==/[userid=d2d5e46c-c6f9-42f3-9a69-fb52fe60940d] */
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hs = NULL;
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while ((hs = subscription_each(h, hs)) != NULL){
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if (hs->hs_format != MSG_NOTIFY_XML)
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continue;
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if (strcmp(hs->hs_stream, stream))
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continue;
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if (strlen(hs->hs_filter)==0 || xpath_first(x, hs->hs_filter) != NULL)
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if ((*hs->hs_fn)(h, x, hs->hs_arg) < 0)
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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 (cb)
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cbuf_free(cb);
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return retval;
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}
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struct client_entry *
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backend_client_add(clicon_handle h, struct sockaddr *addr)
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{
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struct backend_handle *cb = handle(h);
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struct client_entry *ce;
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if ((ce = (struct client_entry *)malloc(sizeof(*ce))) == NULL){
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clicon_err(OE_PLUGIN, errno, "malloc");
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return NULL;
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}
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memset(ce, 0, sizeof(*ce));
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ce->ce_nr = cb->cb_ce_nr++;
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memcpy(&ce->ce_addr, addr, sizeof(*addr));
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ce->ce_next = cb->cb_ce_list;
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cb->cb_ce_list = ce;
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return ce;
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}
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struct client_entry *
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backend_client_list(clicon_handle h)
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{
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struct backend_handle *cb = handle(h);
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return cb->cb_ce_list;
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}
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/*! Actually remove client from list
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* See also backend_client_rm()
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*/
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int
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backend_client_delete(clicon_handle h, struct client_entry *ce)
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{
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struct client_entry *c;
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struct client_entry **ce_prev;
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struct backend_handle *cb = handle(h);
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ce_prev = &cb->cb_ce_list;
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for (c = *ce_prev; c; c = c->ce_next){
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if (c == ce){
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*ce_prev = c->ce_next;
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free(ce);
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break;
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}
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ce_prev = &c->ce_next;
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}
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return 0;
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}
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/*! Add subscription given stream name, callback and argument
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* @param[in] h Clicon handle
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* @param[in] stream Name of event stream
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* @param[in] format Expected format of event, eg text or xml
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* @param[in] filter Filter to match event, depends on format, eg xpath for xml
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* @param[in] fn Callback when event occurs
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* @param[in] arg Argument to use with callback. Also handle when deleting
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* Note that arg is not a real handle.
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* @see subscription_delete
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* @see subscription_each
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*/
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struct handle_subscription *
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subscription_add(clicon_handle h,
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char *stream,
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enum format_enum format,
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char *filter,
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subscription_fn_t fn,
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void *arg)
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{
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struct backend_handle *cb = handle(h);
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struct handle_subscription *hs = NULL;
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if ((hs = malloc(sizeof(*hs))) == NULL){
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clicon_err(OE_PLUGIN, errno, "malloc");
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goto done;
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}
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memset(hs, 0, sizeof(*hs));
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hs->hs_stream = strdup(stream);
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hs->hs_format = format;
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hs->hs_filter = strdup(filter);
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hs->hs_next = cb->cb_subscription;
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hs->hs_fn = fn;
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hs->hs_arg = arg;
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cb->cb_subscription = hs;
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done:
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return hs;
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}
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/*! Delete subscription given stream name, callback and argument
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* @param[in] h Clicon handle
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* @param[in] stream Name of event stream
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* @param[in] fn Callback when event occurs
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* @param[in] arg Argument to use with callback and handle
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* Note that arg is not a real handle.
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* @see subscription_add
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* @see subscription_each
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*/
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int
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subscription_delete(clicon_handle h,
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char *stream,
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subscription_fn_t fn,
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void *arg)
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{
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struct backend_handle *cb = handle(h);
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struct handle_subscription *hs;
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struct handle_subscription **hs_prev;
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hs_prev = &cb->cb_subscription; /* this points to stack and is not real backpointer */
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for (hs = *hs_prev; hs; hs = hs->hs_next){
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/* XXX arg == hs->hs_arg */
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if (strcmp(hs->hs_stream, stream)==0 && hs->hs_fn == fn){
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*hs_prev = hs->hs_next;
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free(hs->hs_stream);
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if (hs->hs_filter)
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free(hs->hs_filter);
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if (hs->hs_arg)
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free(hs->hs_arg);
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free(hs);
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break;
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}
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hs_prev = &hs->hs_next;
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}
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return 0;
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}
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/*! Iterator over subscriptions
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*
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* NOTE: Never manipulate the child-list during operation or using the
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* same object recursively, the function uses an internal field to remember the
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* index used. It works as long as the same object is not iterated concurrently.
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*
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* @param[in] h clicon handle
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* @param[in] hprev iterator, initialize with NULL
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* @code
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* clicon_handle h;
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* struct handle_subscription *hs = NULL;
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* while ((hs = subscription_each(h, hs)) != NULL) {
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* ...
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* }
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* @endcode
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*/
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struct handle_subscription *
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subscription_each(clicon_handle h,
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struct handle_subscription *hprev)
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{
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struct backend_handle *cb = handle(h);
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struct handle_subscription *hs = NULL;
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if (hprev)
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hs = hprev->hs_next;
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else
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hs = cb->cb_subscription;
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return hs;
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}
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