// // message.hh : Message definitions // authors : Fabio Silva // // Copyright (C) 2000-2001 by the Unversity of Southern California // $Id: message.hh,v 1.5 2002/09/16 17:57:29 haldar Exp $ // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License, // version 2, as published by the Free Software Foundation. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License along // with this program; if not, write to the Free Software Foundation, Inc., // 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. // // // This file defines the Message class, used inside a node to // represent a diffusion message. It contains all elements from the // packet header in addition to the packet's attributes. The Message // class also contains other flags that are not part of diffusion // packets. new_message_ indicates if this packet/message was seen in // the past, indicating a loop (this is set by diffusion upon // receiving the packet). next_port_ is used by the Filter API to // indicate the packet's next destination. // // This file also defines two other attributes (ControlMsgAttr and // OriginalHdrAttr) and two classes (ControlMessage and // OriginalHeader). These are used when sending packets/messages from // the diffusion core to the library API. // // The function CopyMessage can be used to copy a message. It returns // a pointer to the newly created message. The original message is not // changed. #ifndef _MESSAGE_HH_ #define _MESSAGE_HH_ #ifdef HAVE_CONFIG_H #include "config.h" #endif // HAVE_CONFIG_H #include "nr/nr.hh" #include "header.hh" #include "attrs.hh" class Message { public: // Read directly from the packet header int8_t version_; int8_t msg_type_; u_int16_t source_port_; int16_t data_len_; int16_t num_attr_; int32_t pkt_num_; int32_t rdm_id_; int32_t next_hop_; int32_t last_hop_; // Added variables int new_message_; u_int16_t next_port_; // Message attributes NRAttrVec *msg_attr_vec_; Message(int8_t version, int8_t msg_type, u_int16_t source_port, u_int16_t data_len, u_int16_t num_attr, int32_t pkt_num, int32_t rdm_id, int32_t next_hop, int32_t last_hop) : version_(version), msg_type_(msg_type), source_port_(source_port), data_len_(data_len), num_attr_(num_attr), pkt_num_(pkt_num), rdm_id_(rdm_id), next_hop_(next_hop), last_hop_(last_hop) { msg_attr_vec_ = NULL; next_port_ = 0; new_message_ = 1; // New message by default, will be changed // later if message is found to be old } ~Message() { if (msg_attr_vec_){ ClearAttrs(msg_attr_vec_); delete msg_attr_vec_; } } }; extern NRSimpleAttributeFactory ControlMsgAttr; extern NRSimpleAttributeFactory OriginalHdrAttr; #define CONTROL_MESSAGE_KEY 1400 #define ORIGINAL_HEADER_KEY 1401 // Control Message types typedef enum ctl_t_ { ADD_UPDATE_FILTER, REMOVE_FILTER, SEND_MESSAGE } ctl_t; class ControlMessage { public: ControlMessage(int32_t command, int32_t param1, int32_t param2) : command_(command), param1_(param1), param2_(param2) {}; int32_t command_; int32_t param1_; int32_t param2_; }; class RedirectMessage { public: RedirectMessage(int8_t new_message, int8_t msg_type, u_int16_t source_port, u_int16_t data_len, u_int16_t num_attr, int32_t rdm_id, int32_t pkt_num, int32_t next_hop, int32_t last_hop, int32_t handle, u_int16_t next_port) : new_message_(new_message), msg_type_(msg_type), source_port_(source_port), data_len_(data_len), num_attr_(num_attr), rdm_id_(rdm_id), pkt_num_(pkt_num), next_hop_(next_hop), last_hop_(last_hop), handle_(handle), next_port_(next_port) {}; int8_t new_message_; int8_t msg_type_; u_int16_t source_port_; u_int16_t data_len_; u_int16_t num_attr_; int32_t rdm_id_; int32_t pkt_num_; int32_t next_hop_; int32_t last_hop_; int32_t handle_; u_int16_t next_port_; }; Message * CopyMessage(Message *msg); #endif // !_MESSAGE_HH_
