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peer.h
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peer.h
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/*
* $Id$
*
* Copyright (C) 2012 Smile Communications, jason.penton@smilecoms.com
* Copyright (C) 2012 Smile Communications, richard.good@smilecoms.com
*
* The initial version of this code was written by Dragos Vingarzan
* (dragos(dot)vingarzan(at)fokus(dot)fraunhofer(dot)de and the
* Fruanhofer Institute. It was and still is maintained in a separate
* branch of the original SER. We are therefore migrating it to
* Kamailio/SR and look forward to maintaining it from here on out.
* 2011/2012 Smile Communications, Pty. Ltd.
* ported/maintained/improved by
* Jason Penton (jason(dot)penton(at)smilecoms.com and
* Richard Good (richard(dot)good(at)smilecoms.com) as part of an
* effort to add full IMS support to Kamailio/SR using a new and
* improved architecture
*
* NB: Alot of this code was originally part of OpenIMSCore,
* FhG Fokus.
* Copyright (C) 2004-2006 FhG Fokus
* Thanks for great work! This is an effort to
* break apart the various CSCF functions into logically separate
* components. We hope this will drive wider use. We also feel
* that in this way the architecture is more complete and thereby easier
* to manage in the Kamailio/SR environment
*
* This file is part of Kamailio, a free SIP server.
*
* Kamailio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version
*
* Kamailio 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifndef __PEER_H
#define __PEER_H
#include "utils.h"
#include "config.h"
#include "diameter.h"
#include <sys/types.h>
/** Peer states definition */
typedef enum {
Closed = 0, /**< Not connected */
Wait_Conn_Ack = 1, /**< Connecting - waiting for Ack */
Wait_I_CEA = 2, /**< Connecting - waiting for Capabilities Exchange Answer */
Wait_Conn_Ack_Elect = 3, /**< Connecting - Acknolegded and going for Election */
Wait_Returns = 4, /**< Connecting - done */
R_Open = 5, /**< Connected as receiver */
I_Open = 6, /**< Connected as initiator */
Closing = 7 /**< Closing the connection */
} peer_state_t;
/** Peer events definition */
typedef enum {
Start = 101, /**< Start connection attempt */
Stop = 102, /**< Stop */
Timeout = 103, /**< Time-out */
Win_Election = 104, /**< Winning the election */
R_Conn_CER = 105, /**< Receiver - Received connection Capabilities Exchange Request */
I_Rcv_Conn_Ack = 106, /**< Initiator - Received connection Ack */
I_Rcv_Conn_NAck = 107, /**< Initiator - Received connection NAck */
I_Rcv_CER = 108, /**< Initiator - Receiver Capabilities Exchange Request */
I_Rcv_CEA = 109, /**< Initiator - Receiver Capabilities Exchange Answer */
R_Rcv_CER = 110, /**< Receiver - Receiver Capabilities Exchange Request */
R_Rcv_CEA = 111, /**< Receiver - Receiver Capabilities Exchange Answer */
I_Rcv_Non_CEA = 112, /**< Initiator - Received non-Capabilities Exchange Answer */
I_Rcv_DPR = 113, /**< Initiator - Received Disconnect Peer Request */
I_Rcv_DPA = 114, /**< Initiator - Received Disconnect Peer Answer */
R_Rcv_DPR = 115, /**< Receiver - Received Disconnect Peer Request */
R_Rcv_DPA = 116, /**< Receiver - Received Disconnect Peer Answer */
I_Rcv_DWR = 117, /**< Initiator - Received Diameter Watch-dog Request */
I_Rcv_DWA = 118, /**< Initiator - Received Diameter Watch-dog Answer */
R_Rcv_DWR = 119, /**< Receiver - Received Diameter Watch-dog Request */
R_Rcv_DWA = 120, /**< Receiver - Received Diameter Watch-dog Answer */
Send_Message = 121, /**< Send a message */
I_Rcv_Message = 122, /**< Initiator - Received a message */
R_Rcv_Message = 123, /**< Receiver - Received a message */
I_Peer_Disc = 124, /**< Initiator - Peer disconnected */
R_Peer_Disc = 125 /**< Receiver - Peer disconnected */
} peer_event_t;
/** Peer data structure */
typedef struct _peer_t{
str fqdn; /**< FQDN of the peer */
str realm; /**< Realm of the peer */
int port; /**< TCP Port of the peer */
str src_addr; /**< IP Address used to connect to the peer */
app_config *applications;/**< list of supported applications */
int applications_cnt; /**< size of list of supporter applications*/
gen_lock_t *lock; /**< lock for operations with this peer */
peer_state_t state; /**< state of the peer */
int I_sock; /**< socket used as initiator */
int R_sock; /**< socket used as receiver */
time_t activity; /**< timestamp of last activity */
time_t last_selected; /**< timestamp this peer was last selected for routing - used in least recently used load balancing across metric */
int is_dynamic; /**< whether this peer was accepted although it was not initially configured */
int disabled; /**< administratively enable/disable a peer - ie remove/re-add from service dynamically */
int waitingDWA; /**< if a Diameter Watch-dog Request was sent out and waiting for an answer */
str send_pipe_name; /**< pipe to signal messages to be sent out*/
int fd_exchange_pipe_local; /**< pipe to communicate with the receiver process and exchange a file descriptor - local end, to read from */
int fd_exchange_pipe; /**< pipe to communicate with the receiver process and exchange a file descriptor */
AAAMessage *r_cer; /**< the cer received from R-connection */
struct _peer_t *next; /**< next peer in the peer list */
struct _peer_t *prev; /**< previous peer in the peer list */
} peer;
peer* new_peer(str fqdn,str realm,int port,str src_addr);
void free_peer(peer *x,int locked);
inline void touch_peer(peer *p);
#endif