don't try to support 'i' or 'r' options if chan_zap is not loaded, and warn the user when they attempt to use them (issue #6675)

update application help text to more clearly define when Zaptel and chan_zap are required


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@18087 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_meetme.c

@@ -70,8 +70,9 @@ static const char *descrip =
 "If the conference number is omitted, the user will be prompted to enter\n"
 "one. \n"
 "User can exit the conference by hangup, or if the 'p' option is specified, by pressing '#'.\n"
-"Please note: A ZAPTEL INTERFACE MUST BE INSTALLED FOR CONFERENCING TO WORK!\n\n"
-
+"Please note: The Zaptel kernel modules and at least one hardware driver (or ztdummy)\n"
+"             must be present for conferencing to operate properly. In additon, the chan_zap\n"
+"             channel driver must be loaded for the 'i' and 'r' options to operate at all.\n\n"
 "The option string may contain zero or more of the following characters:\n"
 "      'a' -- set admin mode\n"
 "      'A' -- set marked mode\n"
@@ -1620,7 +1621,8 @@ static int conf_run(struct ast_channel *chan, struct ast_conference *conf, int c
 	return ret;
 }
 
-static struct ast_conference *find_conf(struct ast_channel *chan, char *confno, int make, int dynamic, char *dynamic_pin)
+static struct ast_conference *find_conf(struct ast_channel *chan, char *confno, int make, int dynamic, char *dynamic_pin,
+					struct ast_flags *confflags)
 {
 	struct ast_config *cfg;
 	struct ast_variable *var;
@@ -1695,6 +1697,19 @@ static struct ast_conference *find_conf(struct ast_channel *chan, char *confno,
 			dynamic_pin[0] = '\0';
 	}
 
+	if (confflags && !cnf->chan &&
+	    !ast_test_flag(confflags, CONFFLAG_QUIET) &&
+	    ast_test_flag(confflags, CONFFLAG_INTROUSER)) {
+		ast_log(LOG_WARNING, "No Zap channel available for conference, user introduction disabled (is chan_zap loaded?)\n");
+		ast_clear_flag(confflags, CONFFLAG_INTROUSER);
+	}
+
+	if (confflags && !cnf->chan &&
+	    ast_test_flag(confflags, CONFFLAG_RECORDCONF)) {
+		ast_log(LOG_WARNING, "No Zap channel available for conference, conference recording disabled (is chan_zap loaded?)\n");
+		ast_clear_flag(confflags, CONFFLAG_RECORDCONF);
+	}
+
 	return cnf;
 }
 
@@ -1723,7 +1738,7 @@ static int count_exec(struct ast_channel *chan, void *data)
 	}
 	
 	confnum = strsep(&localdata,"|");       
-	conf = find_conf(chan, confnum, 0, 0, NULL);
+	conf = find_conf(chan, confnum, 0, 0, NULL, NULL);
 	if (conf)
 		count = conf->users;
 	else
@@ -1910,7 +1925,7 @@ static int conf_exec(struct ast_channel *chan, void *data)
 		}
 		if (!ast_strlen_zero(confno)) {
 			/* Check the validity of the conference */
-			cnf = find_conf(chan, confno, 1, dynamic, the_pin);
+			cnf = find_conf(chan, confno, 1, dynamic, the_pin, &confflags);
 			if (!cnf) {
 				res = ast_streamfile(chan, "conf-invalid", chan->language);
 				if (!res)