lib-smtp: server: Add ability to determine whether command reply was …

…created using smtp_server_reply_create_forward().

src/lib-smtp/smtp-server-command.c

@@ -506,6 +506,25 @@ bool smtp_server_command_is_replied(struct smtp_server_command *cmd)
 	return TRUE;
 }
 
+bool smtp_server_command_reply_is_forwarded(struct smtp_server_command *cmd)
+{
+	unsigned int i;
+
+	if (!array_is_created(&cmd->replies))
+		return FALSE;
+
+	for (i = 0; i < cmd->replies_expected; i++) {
+		const struct smtp_server_reply *reply =
+			array_idx(&cmd->replies, i);
+		if (!reply->submitted)
+			return FALSE;
+		if (reply->forwarded)
+			return TRUE;
+	}
+
+	return FALSE;
+}
+
 struct smtp_server_reply *
 smtp_server_command_get_reply(struct smtp_server_command *cmd,
 	unsigned int idx)

src/lib-smtp/smtp-server-private.h

@@ -71,6 +71,7 @@ struct smtp_server_reply {
 
 	bool submitted:1;
 	bool sent:1;
+	bool forwarded:1;
 };
 
 struct smtp_server_command_reg {

src/lib-smtp/smtp-server-reply.c

@@ -70,6 +70,7 @@ static void smtp_server_reply_clear(struct smtp_server_reply *reply)
 		reply->command->replies_submitted--;
 	}
 	reply->submitted = FALSE;
+	reply->forwarded = FALSE;
 }
 
 static struct smtp_server_reply *
@@ -156,6 +157,7 @@ smtp_server_reply_create_forward(struct smtp_server_command *cmd,
 	reply = smtp_server_reply_create_index(cmd, index,
 		from->status, smtp_reply_get_enh_code(from));
 	smtp_reply_write(reply->content->text, from);
+	reply->forwarded = TRUE;
 
 	return reply;
 }

src/lib-smtp/smtp-server.h

@@ -466,6 +466,7 @@ smtp_server_command_get_reply(struct smtp_server_command *cmd,
 bool smtp_server_command_reply_status_equals(struct smtp_server_command *cmd,
 					     unsigned int status);
 bool smtp_server_command_is_replied(struct smtp_server_command *cmd);
+bool smtp_server_command_reply_is_forwarded(struct smtp_server_command *cmd);
 bool smtp_server_command_replied_success(struct smtp_server_command *cmd);
 
 void smtp_server_command_input_lock(struct smtp_server_cmd_ctx *cmd);