A brief file description. More...

#include "I_EventSystem.h"

Include dependency graph for P_DNSProcessor.h:

This graph shows which files directly or indirectly include this file:

Data Structures
struct	DNSEntry
	One DNSEntry is allocated per outstanding request. More...
struct	DNSHandler
	One DNSHandler is allocated to handle all DNS traffic by polling a UDP port. More...
struct	DNSServer
Defines
#define	MAX_NAMED 32
#define	DEFAULT_DNS_RETRIES 5
#define	MAX_DNS_RETRIES 9
#define	DEFAULT_DNS_TIMEOUT 30
#define	MAX_DNS_IN_FLIGHT 2048
#define	DEFAULT_FAILOVER_NUMBER (DEFAULT_DNS_RETRIES + 1)
#define	DEFAULT_FAILOVER_PERIOD (DEFAULT_DNS_TIMEOUT + 30)
#define	DEFAULT_FAILOVER_TRY_PERIOD (DEFAULT_DNS_TIMEOUT + 1)
#define	DEFAULT_DNS_SEARCH 1
#define	FAILOVER_SOON_RETRY 5
#define	NO_NAMESERVER_SELECTED -1
#define	DNS_PERIOD HRTIME_MSECONDS(-100)
#define	DNS_DELAY_PERIOD HRTIME_MSECONDS(10)
#define	DNS_SEQUENCE_NUMBER_RESTART_OFFSET 4000
#define	DNS_PRIMARY_RETRY_PERIOD HRTIME_SECONDS(5)
#define	DNS_PRIMARY_REOPEN_PERIOD HRTIME_SECONDS(60)
#define	BAD_DNS_RESULT ((HostEnt*)(uintptr_t)-1)
#define	DEFAULT_NUM_TRY_SERVER 8
#define	HFIXEDSZ 12
#define	QFIXEDSZ 4
#define	DNS_EVENT_LOOKUP DNS_EVENT_EVENTS_START
#define	DNS_DEBUG_COUNT_DYN_STAT(_x, _y) RecIncrRawStatCount(dns_rsb, mutex->thread_holding, (int)_x, _y)
#define	DNS_INCREMENT_DYN_STAT(_x) RecIncrRawStatSum(dns_rsb, mutex->thread_holding, (int)_x, 1)
#define	DNS_DECREMENT_DYN_STAT(_x) RecIncrRawStatSum(dns_rsb, mutex->thread_holding, (int)_x, -1)
#define	DNS_SUM_DYN_STAT(_x, _r) RecIncrRawStatSum(dns_rsb, mutex->thread_holding, (int)_x, _r)
#define	DNS_READ_DYN_STAT(_x, _count, _sum)
#define	DNS_SET_DYN_COUNT(_x, _count) RecSetRawStatCount(dns_rsb, _x, _count);
#define	DNS_INCREMENT_THREAD_DYN_STAT(_s, _t) RecIncrRawStatSum(dns_rsb, _t, (int) _s, 1);
#define	DNS_DECREMENT_THREAD_DYN_STAT(_s, _t) RecIncrRawStatSum(dns_rsb, _t, (int) _s, -1);
#define	DOT_SEPARATED(_x)
Typedefs
typedef int(DNSEntry::*	DNSEntryHandler )(int, void *)
Enumerations
enum	DNS_Stats { dns_total_lookups_stat, dns_response_time_stat, dns_success_time_stat, dns_lookup_success_stat, dns_lookup_fail_stat, dns_fail_time_stat, dns_retries_stat, dns_max_retries_exceeded_stat, dns_sequence_number_stat, dns_in_flight_stat, DNS_Stat_Count }
Functions
void *	dns_udp_receiver (void *arg)
Variables
int	dns_timeout
int	dns_retries
int	dns_search
int	dns_failover_number
int	dns_failover_period
int	dns_failover_try_period
int	dns_max_dns_in_flight
unsigned int	dns_sequence_number
int	dns_fd
RecRawStatBlock *	dns_rsb

Detailed Description

A brief file description.

License

Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Definition in file P_DNSProcessor.h.

Define Documentation

#define BAD_DNS_RESULT ((HostEnt*)(uintptr_t)-1)

Definition at line 71 of file P_DNSProcessor.h.

Referenced by dns_result().

#define DEFAULT_DNS_RETRIES 5

Definition at line 37 of file P_DNSProcessor.h.

#define DEFAULT_DNS_SEARCH 1

Definition at line 46 of file P_DNSProcessor.h.

#define DEFAULT_DNS_TIMEOUT 30

Definition at line 39 of file P_DNSProcessor.h.

#define DEFAULT_FAILOVER_NUMBER (DEFAULT_DNS_RETRIES + 1)

Definition at line 41 of file P_DNSProcessor.h.

#define DEFAULT_FAILOVER_PERIOD (DEFAULT_DNS_TIMEOUT + 30)

Definition at line 42 of file P_DNSProcessor.h.

#define DEFAULT_FAILOVER_TRY_PERIOD (DEFAULT_DNS_TIMEOUT + 1)

Definition at line 45 of file P_DNSProcessor.h.

#define DEFAULT_NUM_TRY_SERVER 8

Definition at line 72 of file P_DNSProcessor.h.

Referenced by dns_process(), and DNSHandler::try_primary_named().

#define DNS_DEBUG_COUNT_DYN_STAT	(	_x,
		_y
	)		RecIncrRawStatCount(dns_rsb, mutex->thread_holding, (int)_x, _y)

Definition at line 116 of file P_DNSProcessor.h.

#define DNS_DECREMENT_DYN_STAT ( _x ) RecIncrRawStatSum(dns_rsb, mutex->thread_holding, (int)_x, -1)

Definition at line 122 of file P_DNSProcessor.h.

Referenced by dns_process(), DNSEntry::mainEvent(), and DNSHandler::rr_failure().

#define DNS_DECREMENT_THREAD_DYN_STAT	(	_s,
		_t
	)		RecIncrRawStatSum(dns_rsb, _t, (int) _s, -1);

Definition at line 139 of file P_DNSProcessor.h.

#define DNS_DELAY_PERIOD HRTIME_MSECONDS(10)

Definition at line 67 of file P_DNSProcessor.h.

Referenced by DNSEntry::delayEvent().

#define DNS_EVENT_LOOKUP DNS_EVENT_EVENTS_START

Definition at line 85 of file P_DNSProcessor.h.

Referenced by HttpDebugNames::get_event_name(), DNSEntry::postEvent(), and TestDnsStateMachine::processEvent().

#define DNS_INCREMENT_DYN_STAT ( _x ) RecIncrRawStatSum(dns_rsb, mutex->thread_holding, (int)_x, 1)

Definition at line 119 of file P_DNSProcessor.h.

Referenced by dns_process(), dns_result(), write_dns(), and write_dns_event().

#define DNS_INCREMENT_THREAD_DYN_STAT	(	_s,
		_t
	)		RecIncrRawStatSum(dns_rsb, _t, (int) _s, 1);

Definition at line 136 of file P_DNSProcessor.h.

#define DNS_PERIOD HRTIME_MSECONDS(-100)

Definition at line 66 of file P_DNSProcessor.h.

Referenced by dns_result(), DNSHandler::startEvent(), and DNSHandler::startEvent_sdns().

#define DNS_PRIMARY_REOPEN_PERIOD HRTIME_SECONDS(60)

Definition at line 70 of file P_DNSProcessor.h.

Referenced by DNSHandler::retry_named(), and DNSHandler::try_primary_named().

#define DNS_PRIMARY_RETRY_PERIOD HRTIME_SECONDS(5)

Definition at line 69 of file P_DNSProcessor.h.

Referenced by DNSHandler::mainEvent(), and DNSHandler::try_primary_named().

#define DNS_READ_DYN_STAT	(	_x,
		_count,
		_sum
	)

Value:

do {    \
    RecGetRawStatSum(dns_rsb, (int)_x, &_sum);      \
    RecGetRawStatCount(dns_rsb, (int)_x, &_count);  \
  } while (0)

Definition at line 128 of file P_DNSProcessor.h.

#define DNS_SEQUENCE_NUMBER_RESTART_OFFSET 4000

Definition at line 68 of file P_DNSProcessor.h.

#define DNS_SET_DYN_COUNT	(	_x,
		_count
	)		RecSetRawStatCount(dns_rsb, _x, _count);

Definition at line 133 of file P_DNSProcessor.h.

#define DNS_SUM_DYN_STAT	(	_x,
		_r
	)		RecIncrRawStatSum(dns_rsb, mutex->thread_holding, (int)_x, _r)

Definition at line 125 of file P_DNSProcessor.h.

Referenced by dns_process(), and dns_result().

#define DOT_SEPARATED ( _x )

Value:

((unsigned char*)&(_x))[0], ((unsigned char*)&(_x))[1],   \
    ((unsigned char*)&(_x))[2], ((unsigned char*)&(_x))[3]

Definition at line 343 of file P_DNSProcessor.h.

#define FAILOVER_SOON_RETRY 5

Definition at line 47 of file P_DNSProcessor.h.

Referenced by DNSHandler::failover_soon().

#define HFIXEDSZ 12

Definition at line 76 of file P_DNSProcessor.h.

Referenced by dns_process(), and ink_res_mkquery().

#define MAX_DNS_IN_FLIGHT 2048

Definition at line 40 of file P_DNSProcessor.h.

#define MAX_DNS_RETRIES 9

Definition at line 38 of file P_DNSProcessor.h.

#define MAX_NAMED 32

Definition at line 36 of file P_DNSProcessor.h.

Referenced by DNSHandler::failover(), DNSHandler::rr_failure(), DNSHandler::startEvent(), and write_dns().

#define NO_NAMESERVER_SELECTED -1

Definition at line 48 of file P_DNSProcessor.h.

#define QFIXEDSZ 4

Definition at line 79 of file P_DNSProcessor.h.

Referenced by ink_res_mkquery().

Typedef Documentation

typedef int(DNSEntry::* DNSEntryHandler)(int, void *)

Definition at line 194 of file P_DNSProcessor.h.

Enumeration Type Documentation

enum DNS_Stats

Enumerator:

dns_total_lookups_stat
dns_response_time_stat
dns_success_time_stat
dns_lookup_success_stat
dns_lookup_fail_stat
dns_fail_time_stat
dns_retries_stat
dns_max_retries_exceeded_stat
dns_sequence_number_stat
dns_in_flight_stat
DNS_Stat_Count