sip_enable_counters, sip_disable_counters, sip_get_counter_value - counter operations
cc [ flag... ] file... -lsip [ library... ] #include <sip.h> int sip_enable_counters(int counter_group);
int sip_disable_counters(int counter_group);
int sip_get_counter_value(int group, int counter, void *counterval, size_t counterlen);
The sip_enable_counters() function enables the measurement and counting of the selected counter group. The only allowed value for the counter_group is SIP_TRAFFIC_COUNTERS, which is defined in sip.h. Once enabled, the SIP stack starts measuring end-to-end SIP traffic. The SIP stack keeps track of:
the number of SIP requests sent and received (broken down by methods),
the number of SIP responses sent and received (broken down by response codes), and
the number of bytes sent and received.
The following counters are defined in sip.h for the SIP_TRAFFIC_COUNTERS group. These counter values are retrieved using the sip_get_counter_value() function.
SIP_TOTAL_BYTES_RCVD SIP_TOTAL_BYTES_SENT SIP_TOTAL_REQ_RCVD SIP_TOTAL_REQ_SENT SIP_TOTAL_RESP_RCVD SIP_TOTAL_RESP_SENT SIP_ACK_REQ_RCVD SIP_ACK_REQ_SENT SIP_BYE_REQ_RCVD SIP_BYE_REQ_SENT SIP_CANCEL_REQ_RCVD SIP_CANCEL_REQ_SENT SIP_INFO_REQ_RCVD SIP_INFO_REQ_SENT SIP_INVITE_REQ_RCVD SIP_INVITE_REQ_SENT SIP_NOTIFY_REQ_RCVD SIP_NOTIFY_REQ_SENT SIP_OPTIONS_REQ_RCVD SIP_OPTIONS_REQ_SENT SIP_PRACK_REQ_RCVD SIP_PRACK_REQ_SENT SIP_REFER_REQ_RCVD SIP_REFER_REQ_SENT SIP_REGISTER_REQ_RCVD SIP_REGISTER_REQ_SENT SIP_SUBSCRIBE_REQ_RCVD SIP_SUBSCRIBE_REQ_SENT SIP_UPDATE_REQ_RCVD SIP_UPDATE_REQ_SENT SIP_1XX_RESP_RCVD SIP_1XX_RESP_SENT SIP_2XX_RESP_RCVD SIP_2XX_RESP_SENT SIP_3XX_RESP_RCVD SIP_3XX_RESP_SENT SIP_4XX_RESP_RCVD SIP_4XX_RESP_SENT SIP_5XX_RESP_RCVD SIP_5XX_RESP_SENT SIP_6XX_RESP_RCVD SIP_6xx_RESP_SENT SIP_COUNTER_START_TIME /* records time when counting was enabled */ SIP_COUNTER_STOP_TIME /* records time when counting was disabled */
All of the above counters are defined to be uint64_t, except for SIP_COUNTER_START_TIME and SIP_COUNTER_STOP_TIME, which are defined to be time_t.
The sip_disable_counters() function disables measurement and counting for the specified counter_group. When disabled, the counter values are not reset and are retained until the measurement is enabled again. Calling sip_enable_counters() again would reset all counter values to zero and counting would start afresh.
The sip_get_counter_value() function retrieves the value of the specified counter within the specified counter group. The value is copied to the user provided buffer, counterval, of length counterlen. For example, after the following call, invite_rcvd would have the correct value.
uint64_t invite_rcvd; sip_get_counter_value(SIP_TRAFFIC_COUNTERS, SIP_INVITE_REQ_RCVD, &invite_rcvd, sizeof (uint64_t));
Upon successful completion, sip_enable_counters() and sip_disable_counters() return 0. They will return EINVAL if an incorrect group is specified.
Upon successful completion, sip_get_counter_value() returns 0. It returns EINVAL if an incorrect counter name or counter size is specified, or if counterval is NULL.
See attributes(5) for descriptions of the following attributes: