diff --git a/util/clixon_util_dispatcher.c b/util/clixon_util_dispatcher.c new file mode 100644 index 00000000..45571daa --- /dev/null +++ b/util/clixon_util_dispatcher.c @@ -0,0 +1,190 @@ +/* + * + ***** BEGIN LICENSE BLOCK ***** + + Copyright (C) 2021 Olof Hagsand and Rubicon Communications, LLC(Netgate) + + This file is part of CLIXON. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + + Alternatively, the contents of this file may be used under the terms of + the GNU General Public License Version 3 or later (the "GPL"), + in which case the provisions of the GPL are applicable instead + of those above. If you wish to allow use of your version of this file only + under the terms of the GPL, and not to allow others to + use your version of this file under the terms of Apache License version 2, + indicate your decision by deleting the provisions above and replace them with + the notice and other provisions required by the GPL. If you do not delete + the provisions above, a recipient may use your version of this file under + the terms of any one of the Apache License version 2 or the GPL. + + ***** END LICENSE BLOCK ***** + +* Utility for testing path dispatcher +* Everything is run by options and order is significant which makes it a little special. +* For example: +* clixon_util_dispatcher -r -c / : +* Register cb1 with default path "/" and arg NULL, call with path / +* clixon_util_dispatcher -i 2 -p /foo -a bar -r -c /bar -c /fie +* Register cb2 with path "/foo" and arg bar, call with path /bar then /fie +*/ + +#ifdef HAVE_CONFIG_H +#include "clixon_config.h" /* generated by config & autoconf */ +#endif + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* cligen */ +#include + +/* clixon */ +#include "clixon/clixon.h" +#include "clixon/clixon_backend.h" + +/* Command line options to be passed to getopt(3) */ +#define DISPATCHER_OPTS "hD:a:i:p:rc:" + +static int +usage(char *argv0) +{ + fprintf(stderr, "usage:%s [options]\n" + "where options are\n" + "\t-h \t\tHelp\n" + "\t-D \t Debug - print dispatch tree\n" + "\t-a \t Argument to callback (default: NULL)\n" + "\t-i \t Function index: 1..3 (default: 1)\n" + "\t-p \t Registered path (default: /)\n" + "\t-r \t Register callback (based on -a/-i/-p setting)\n" + "\t-c \t Call dispatcher with path\n", + argv0 + ); + exit(0); +} + +/*! Function to handle a path + * + * @param[in] h Generic handler + * @param[in] xpath Registered XPath using canonical prefixes + * @param[in] userargs Per-call user arguments + * @param[in] arg Per-path user argument + *( +/ * Make a CB() macro to generate simple callbacks that just prints the path and arg + */ +#define CB(i) static int cb##i(void *h0, char *xpath, void *userargs, void *arg) { fprintf(stdout, "%s %s\n", __FUNCTION__, (char*)arg); return 0; } + +CB(1) +CB(2) + +int +main(int argc, + char **argv) +{ + int retval = -1; + char *argv0 = argv[0]; + int logdst = CLICON_LOG_STDERR; + int dbg = 0; + int c; + char *arg = NULL; + handler_function fn = cb1; + dispatcher_entry_t *htable = NULL; + int ret; + char *regpath = "/"; /* Register path */ + + /* In the startup, logs to stderr & debug flag set later */ + clicon_log_init("dispatcher", LOG_DEBUG, logdst); + + optind = 1; + opterr = 0; + while ((c = getopt(argc, argv, DISPATCHER_OPTS)) != -1) + switch (c) { + case 'h': + usage(argv0); + break; + case 'D': + if (sscanf(optarg, "%d", &dbg) != 1) + usage(argv0); + break; + + case 'a' : + case 'i' : + case 'p' : + case 'r' : + case 'c' : + break; + default: + usage(argv[0]); + break; + } + /* + * Logs, error and debug to stderr or syslog, set debug level + */ + clicon_log_init("xpath", dbg?LOG_DEBUG:LOG_INFO, logdst); + + clicon_debug_init(dbg, NULL); + + /* Now rest of options */ + opterr = 0; + optind = 1; + while ((c = getopt(argc, argv, DISPATCHER_OPTS)) != -1){ + switch (c) { + case 'D' : /* debug */ + break; /* see above */ + case 'a' : /* arg string */ + arg = optarg; + break; + case 'i' : /* dispatcher function: 1..3 */ + switch (atoi(optarg)){ + case 1: fn = cb1; break; + case 2: fn = cb2; break; + // case 3: fn = cb3; break; + } + break; + case 'p' : /* register path */ + regpath = optarg; + break; + case 'r' :{ /* register callback based on -a/-i/-p*/ + dispatcher_definition x = {regpath, fn, arg}; + if (dispatcher_register_handler(&htable, &x) < 0) + goto done; + break; + } + case 'c':{ /* Execute a call using path */ + char *path = optarg; + if ((ret = dispatcher_call_handlers(htable, NULL, path, NULL)) < 0) + goto done; + fprintf(stderr, "path:%s ret:%d\n", path, ret); + break; + } + default: + usage(argv[0]); + break; + } + } + if (dbg) + dispatcher_print(stderr, 0, htable); + dispatcher_free(htable); + retval = 0; + done: + return retval; +}