stats.h
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 #ifndef stats_h
 #define stats_h
 
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 #include <ctype.h>
 #include <sys/mman.h>
 #include <sys/fcntl.h>
 #include <sys/time.h>
 #include <time.h>
 #include <sys/utsname.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <errno.h>
 
 
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 #define _update_request( method, dir )			\
 	{ if (stat_file!=NULL) switch( method ) {	\
           	case METHOD_INVITE: stats->dir##_requests_inv++; break;	\
           	case METHOD_ACK: stats->dir##_requests_ack++; break;		\
           	case METHOD_CANCEL: stats->dir##_requests_cnc++; break;	\
           	case METHOD_BYE: stats->dir##_requests_bye++; break;		\
           	case METHOD_OTHER: stats->dir##_requests_other++; break;	\
           	default: LOG(L_ERR, "ERROR: unknown method in rq stats (%s)\n", #dir);	\
 		}	\
         }
 
 
 /*
 #define update_received_request( method ) _update_request( method, received )
 #define update_sent_request( method ) _update_request( method, sent )
 
 #define update_received_response( statusclass ) _update_response( statusclass, received )
 #define update_sent_response( statusclass ) _update_response( statusclass, sent )
 #define update_received_drops	{  stats->received_drops++; }
 #define update_fail_on_send	{  stats->failed_on_send++; }
 */
 
 #define         _statusline(class, dir )       case class: stats->dir##_responses_##class++; break;
 
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 /* FIXME: Don't have case for _other (see received_responses_other) */
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 #define _update_response( statusclass, dir )		\
         { if (stat_file!=NULL)                          \
                 switch( statusclass ) {                 \
                         _statusline(1, dir)                   \
                         _statusline(2, dir)                   \
                         _statusline(3, dir)                   \
                         _statusline(4, dir)                   \
                         _statusline(5, dir)                   \
                         _statusline(6, dir)                   \
                         default: LOG(L_INFO, "ERROR: unusual status code received in stats (%s)\n", #dir);    \
                 }       \
         }
 
 #ifdef STATS
 #	define STATS_RX_REQUEST(method) _update_request(method, received)
 #	define STATS_TX_REQUEST(method) _update_request(method, sent )
 #	define STATS_RX_RESPONSE(class) _update_response( class, received )
 #	define STATS_TX_RESPONSE(class) _update_response( class, sent )
 #	define STATS_RX_DROPS {  stats->received_drops++; }
 #	define STATS_TX_DROPS {  stats->failed_on_send++; }
 #else
 #	define STATS_RX_REQUEST(method)
 #	define STATS_TX_REQUEST(method)
 #	define STATS_RX_RESPONSE(class) 
 #	define STATS_TX_RESPONSE(class) 
 #	define STATS_RX_DROPS 
 #	define STATS_TX_DROPS 
 #endif
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 #ifdef STATS
 
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 struct stats_s {
 
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 	unsigned int	process_index;
 	pid_t		pid;
 	time_t		start_time;
 
 	unsigned long 
 
 	/* received packets */
 
 	received_requests_inv, 		/* received_requests */
 	received_requests_ack,
 	received_requests_cnc,
 	received_requests_bye,
 	received_requests_other,
 
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 	received_responses_1, 		/* received_responses */
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 	received_responses_2,
 	received_responses_3,
 	received_responses_4,
 	received_responses_5,
 	received_responses_6,
 	received_responses_other,
 
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 	received_drops,	/* all messages we received and did not process
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 					   successfully; reasons include SIP sanity checks 
 					   (missing Vias, neither request nor response, 
 					   failed parsing), ser errors (malloc, action
 					   failure)
 					*/
 
 	/* sent */
 
 	/* sent_requests */
 	sent_requests_inv,
 	sent_requests_ack,
 	sent_requests_cnc,
 	sent_requests_bye,
 	sent_requests_other,
 
 	/* sent responses */
 	sent_responses_1,
 	sent_responses_2,
 	sent_responses_3,
 	sent_responses_4,
 	sent_responses_5,
 	sent_responses_6,
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 	/* FIXME: Don't want sent_responses_other?? */
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 	processed_requests,
 	processed_responses,
 	acc_req_time,
 	acc_res_time,
 
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 	failed_on_send;			
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 };
 
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 extern struct stats_s *stats;
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 extern char *stat_file;
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 int init_stats( int nr_of_processes );
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 void setstats( int child_index );
 int dump_all_statistic();
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 int dump_statistic(FILE *fp, struct stats_s *istats, int printheader);
 /* Registers handlers with SNMP module */
 int stats_register(); 
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 #endif
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 #endif