New configuration option "NoticeAuth": send NOTICE AUTH on connect

When enabling "NoticeAuth" in the [Features] section, ngircd will send
"NOTICE AUTH" messages on client connect like e.g. snircd (QuakeNet) does.

src/ngircd/conf.c

@@ -359,6 +359,7 @@ Conf_Test( void )
 	printf("  DNS = %s\n", yesno_to_str(Conf_DNS));
 	printf("  Ident = %s\n", yesno_to_str(Conf_Ident));
 	printf("  PAM = %s\n", yesno_to_str(Conf_PAM));
+	printf("  NoticeAuth = %s\n", yesno_to_str(Conf_NoticeAuth));
 	puts("");
 
 	opers_puts();
@@ -614,6 +615,7 @@ Set_Defaults(bool InitServers)
 	Conf_PongTimeout = 20;
 	Conf_ConnectRetry = 60;
 	Conf_DNS = true;
+	Conf_NoticeAuth = false;
 
 	Conf_Oper_Count = 0;
 	Conf_Channel_Count = 0;
@@ -1278,6 +1280,11 @@ Handle_FEATURES(int Line, char *Var, char *Arg)
 		WarnPAM(Line);
 		return;
 	}
+	if(strcasecmp(Var, "NoticeAuth") == 0) {
+		/* send NOTICE AUTH messages to clients on connect */
+		Conf_NoticeAuth = Check_ArgIsTrue(Arg);
+		return;
+	}
 
 	Config_Error(LOG_ERR,
 		     "%s, line %d (section \"Features\"): Unknown variable \"%s\"!",

src/ngircd/conf.h

@@ -178,6 +178,9 @@ GLOBAL bool Conf_Ident;
 /** Enable all usage of PAM, even when compiled with support for it */
 GLOBAL bool Conf_PAM;
 
+/** Enable NOTICE AUTH messages on connect */
+GLOBAL bool Conf_NoticeAuth;
+
 /*
  * try to connect to remote systems using the ipv6 protocol,
  * if they have an ipv6 address? (default yes)

src/ngircd/conn.c

@@ -1444,9 +1444,20 @@ New_Connection(int Sock)
 	if (!Conf_Ident)
 		identsock = -1;
 #endif
-	if (Conf_DNS)
+	if (Conf_DNS) {
+		if (Conf_NoticeAuth) {
+#ifdef IDENTAUTH
+			if (Conf_Ident)
+				(void)Conn_WriteStr(new_sock,
+					"NOTICE AUTH :*** Looking up your hostname and checking ident");
+			else
+#endif
+				(void)Conn_WriteStr(new_sock,
+					"NOTICE AUTH :*** Looking up your hostname");
+		}
 		Resolve_Addr(&My_Connections[new_sock].proc_stat, &new_addr,
 			     identsock, cb_Read_Resolver_Result);
+	}
 
 	Account_Connection();
 	return new_sock;
@@ -2175,13 +2186,22 @@ cb_Read_Resolver_Result( int r_fd, UNUSED short events )
 		strlcpy(My_Connections[i].host, readbuf,
 			sizeof(My_Connections[i].host));
 		Client_SetHostname(c, readbuf);
+		if (Conf_NoticeAuth)
+			(void)Conn_WriteStr(i,
+					"NOTICE AUTH :*** Found your hostname");
 #ifdef IDENTAUTH
 		++identptr;
 		if (*identptr) {
 			Log(LOG_INFO, "IDENT lookup for connection %d: \"%s\".", i, identptr);
 			Client_SetUser(c, identptr, true);
+			if (Conf_NoticeAuth)
+				(void)Conn_WriteStr(i,
+					"NOTICE AUTH :*** Got ident response");
 		} else {
 			Log(LOG_INFO, "IDENT lookup for connection %d: no result.", i);
+			if (Conf_NoticeAuth && Conf_Ident)
+				(void)Conn_WriteStr(i,
+					"NOTICE AUTH :*** No ident response");
 		}
 #endif
 	}