dns_internal.cc File Reference

#include "squid.h"
#include "base/CodeContext.h"
#include "base/InstanceId.h"
#include "base/Random.h"
#include "base/RunnersRegistry.h"
#include "comm.h"
#include "comm/Connection.h"
#include "comm/ConnOpener.h"
#include "comm/Loops.h"
#include "comm/Read.h"
#include "comm/Write.h"
#include "debug/Messages.h"
#include "dlink.h"
#include "dns/forward.h"
#include "dns/rfc3596.h"
#include "event.h"
#include "fd.h"
#include "fde.h"
#include "ip/tools.h"
#include "MemBuf.h"
#include "mgr/Registration.h"
#include "snmp_agent.h"
#include "SquidConfig.h"
#include "Store.h"
#include "tools.h"
#include "util.h"
#include "wordlist.h"
#include "snmp_core.h"
#include <cerrno>

Include dependency graph for dns_internal.cc:

Go to the source code of this file.

Classes
class	idns_query
class	nsvc
class	ns
class	Dns::ConfigRr
	manage DNS internal component More...
struct	_sp

Namespaces
namespace	Dns
	generic DNS API

Macros
#define	_PATH_RESCONF   "/etc/resolv.conf"
#define	NS_DEFAULTPORT   53
#define	NS_MAXDNAME   1025
#define	MAXDNSRCH   6
#define	RESOLV_BUFSZ   NS_MAXDNAME * MAXDNSRCH + sizeof("search ") + 1
#define	IDNS_MAX_TRIES   20
#define	MAX_RCODE   17
#define	MAX_ATTEMPT   3

Typedefs
typedef struct _sp	sp

Functions
	InstanceIdDefinitions (idns_query, "dns")
	DefineRunnerRegistratorIn (Dns, ConfigRr)
static void	idnsAddNameserver (const char *buf)
static void	idnsAddMDNSNameservers ()
static void	idnsAddPathComponent (const char *buf)
static void	idnsFreeSearchpath (void)
static bool	idnsParseNameservers (void)
static bool	idnsParseResolvConf (void)
static void	idnsStartQuery (idns_query *q, IDNSCB *callback, void *data)
static void	idnsSendQuery (idns_query *q)
static void	idnsDoSendQueryVC (nsvc *vc)
static int	idnsFromKnownNameserver (Ip::Address const &from)
static idns_query *	idnsFindQuery (unsigned short id)
static void	idnsGrokReply (const char *buf, size_t sz, int from_ns)
static void	idnsTickleQueue (void)
static void	idnsRcodeCount (int, int)
static unsigned short	idnsQueryID (void)
static void	idnsSendSlaveAAAAQuery (idns_query *q)
static void	idnsCallbackOnEarlyError (IDNSCB *callback, void *cbdata, const char *error)
static void	idnsCheckMDNS (idns_query *q)
static void	idnsStats (StoreEntry *sentry)
static void	idnsSentQueryVC (const Comm::ConnectionPointer &conn, char *, size_t size, Comm::Flag flag, int, void *data)
static void	idnsInitVCConnected (const Comm::ConnectionPointer &conn, Comm::Flag status, int, void *data)
static void	idnsVCClosed (const CommCloseCbParams &params)
static void	idnsInitVC (size_t nsv)
static void	idnsSendQueryVC (idns_query *q, size_t nsn)
static bool	idnsStillPending (const idns_query *master)
static std::ostream &	operator<< (std::ostream &os, const idns_query &answered)
static bool	idnsCallbackOneWithAnswer (IDNSCB *callback, void *cbdata, const idns_query &answered, const bool lastAnswer)
	safely sends one set of DNS records (or an error) to the caller More...
static void	idnsCallbackNewCallerWithOldAnswers (IDNSCB *callback, void *cbdata, const idns_query *const master)
static void	idnsCallbackAllCallersWithNewAnswer (const idns_query *const answered, const bool lastAnswer)
static void	idnsCallback (idns_query *q, const char *error)
static void	idnsRead (int fd, void *)
static void	idnsCheckQueue (void *)
static void	idnsReadVC (const Comm::ConnectionPointer &conn, char *buf, size_t len, Comm::Flag flag, int, void *data)
static void	idnsReadVCHeader (const Comm::ConnectionPointer &conn, char *buf, size_t len, Comm::Flag flag, int, void *data)
static void	idnsShutdownAndFreeState (const char *reason)
static int	idnsCachedLookup (const char *key, IDNSCB *callback, void *data)
void	idnsALookup (const char *name, IDNSCB *callback, void *data)
void	idnsPTRLookup (const Ip::Address &addr, IDNSCB *callback, void *data)
variable_list *	snmp_netDnsFn (variable_list *Var, snint *ErrP)

Variables
static int	RcodeMatrix [MAX_RCODE][MAX_ATTEMPT]
static const char *	Rcodes []
static std::vector< ns >	nameservers
static sp *	searchpath = nullptr
static int	nns_mdns_count = 0
static int	npc = 0
static int	npc_alloc = 0
static int	ndots = 1
static dlink_list	lru_list
static int	event_queued = 0
static hash_table *	idns_lookup_hash = nullptr
static OBJH	idnsStats
static IOCB	idnsReadVCHeader
static CNCB	idnsInitVCConnected
static IOCB	idnsReadVC
static IOCB	idnsSentQueryVC
static PF	idnsRead
static EVH	idnsCheckQueue
static CLCB	idnsVCClosed

Macro Definition Documentation

_PATH_RESCONF

#define _PATH_RESCONF   "/etc/resolv.conf"

Definition at line 57 of file dns_internal.cc.

IDNS_MAX_TRIES

#define IDNS_MAX_TRIES   20

Definition at line 76 of file dns_internal.cc.

MAX_ATTEMPT

#define MAX_ATTEMPT   3

Definition at line 78 of file dns_internal.cc.

MAX_RCODE

#define MAX_RCODE   17

Definition at line 77 of file dns_internal.cc.

MAXDNSRCH

#define MAXDNSRCH   6

Definition at line 68 of file dns_internal.cc.

NS_DEFAULTPORT

#define NS_DEFAULTPORT   53

Definition at line 60 of file dns_internal.cc.

NS_MAXDNAME

#define NS_MAXDNAME   1025

Definition at line 64 of file dns_internal.cc.

RESOLV_BUFSZ

#define RESOLV_BUFSZ   NS_MAXDNAME * MAXDNSRCH + sizeof("search ") + 1

Definition at line 73 of file dns_internal.cc.

Typedef Documentation

sp

typedef struct _sp sp

Definition at line 101 of file dns_internal.cc.

Function Documentation

DefineRunnerRegistratorIn()

DefineRunnerRegistratorIn	(	Dns	,
		ConfigRr
	)

idnsAddMDNSNameservers()

static void idnsAddMDNSNameservers ( )

static

Definition at line 304 of file dns_internal.cc.

References Config, SquidConfig::dns_mdns, Ip::EnableIpv6, idnsAddNameserver(), nameservers, nns_mdns_count, and SquidConfig::onoff.

Referenced by Dns::Init().

idnsAddNameserver()

static void idnsAddNameserver ( const char *  buf )

static

Definition at line 328 of file dns_internal.cc.

References A, DBG_CRITICAL, DBG_IMPORTANT, debugs, Ip::EnableIpv6, nameservers, NS_DEFAULTPORT, and RFC1035_DEFAULT_PACKET_SZ.

Referenced by idnsAddMDNSNameservers(), idnsParseNameservers(), idnsParseResolvConf(), and Dns::Init().

idnsAddPathComponent()

static void idnsAddPathComponent ( const char *  buf )

static

Definition at line 359 of file dns_internal.cc.

References assert, debugs, _sp::domain, npc, npc_alloc, safe_free, searchpath, Tolower(), and xcalloc().

Referenced by idnsParseResolvConf().

idnsALookup()

void idnsALookup	(	const char *	name,
		IDNSCB *	callback,
		void *	data
	)

Definition at line 1745 of file dns_internal.cc.

References idns_query::buf, Config, DBG_IMPORTANT, debugs, idns_query::do_searchpath, idns_query::domain, _sp::domain, Ip::EnableIpv6, idnsCachedLookup(), idnsCallbackOnEarlyError(), idnsCheckMDNS(), idnsQueryID(), idnsSendSlaveAAAAQuery(), idnsStartQuery(), idns_query::name, ndots, npc, NS_MAXDNAME, SquidConfig::onoff, idns_query::orig, idns_query::query, idns_query::query_id, SquidConfig::res_defnames, rfc3596BuildAQuery(), searchpath, and idns_query::sz.

Referenced by ipcache_nbgethostbyname_().

idnsCachedLookup()

static int idnsCachedLookup ( const char *  key, IDNSCB *  callback, void *  data  )

static

Definition at line 1677 of file dns_internal.cc.

References idns_query::callback, idns_query::callback_data, cbdataReference, hash_lookup(), idns_lookup_hash, idnsCallbackNewCallerWithOldAnswers(), idnsStillPending(), and idns_query::queue.

Referenced by idnsALookup(), and idnsPTRLookup().

idnsCallback()

static void idnsCallback ( idns_query *  q, const char *  error  )

static

Definition at line 1139 of file dns_internal.cc.

References error(), idns_query::error, hash_table::hash, hash_remove_link(), idns_lookup_hash, idnsCallbackAllCallersWithNewAnswer(), idnsStillPending(), and idns_query::master.

Referenced by idnsCheckQueue(), and idnsGrokReply().

idnsCallbackAllCallersWithNewAnswer()

static void idnsCallbackAllCallersWithNewAnswer ( const idns_query *const  answered, const bool  lastAnswer  )

static

Definition at line 1125 of file dns_internal.cc.

References CallBack(), debugs, and idns_query::master.

Referenced by idnsCallback().

idnsCallbackNewCallerWithOldAnswers()

static void idnsCallbackNewCallerWithOldAnswers ( IDNSCB *  callback, void *  cbdata, const idns_query *const  master  )

static

Definition at line 1111 of file dns_internal.cc.

References idnsCallbackOneWithAnswer(), and idns_query::slave.

Referenced by idnsCachedLookup().

idnsCallbackOnEarlyError()

static void idnsCallbackOnEarlyError ( IDNSCB *  callback, void *  cbdata, const char *  error  )

static

Definition at line 1090 of file dns_internal.cc.

References debugs, and error().

Referenced by idnsALookup(), and idnsPTRLookup().

idnsCallbackOneWithAnswer()

static bool idnsCallbackOneWithAnswer ( IDNSCB *  callback, void *  cbdata, const idns_query &  answered, const bool  lastAnswer  )

static

Definition at line 1100 of file dns_internal.cc.

References idns_query::ancount, _rfc1035_message::answer, cbdataReferenceValid(), debugs, idns_query::error, and idns_query::message.

Referenced by idnsCallbackNewCallerWithOldAnswers().

idnsCheckMDNS()

static void idnsCheckMDNS ( idns_query *  q )

static

Definition at line 292 of file dns_internal.cc.

References Config, SquidConfig::dns_mdns, idns_query::name, SquidConfig::onoff, and idns_query::permit_mdns.

Referenced by idnsALookup(), idnsGrokReply(), and idnsSendSlaveAAAAQuery().

idnsCheckQueue()

static void idnsCheckQueue ( void *  )

static

Definition at line 1396 of file dns_internal.cc.

References Config, current_time, dlink_node::data, debugs, dlinkAdd(), dlinkDelete(), event_queued, SquidConfig::idns_query, SquidConfig::idns_retransmit, idnsCallback(), idnsSendQuery(), idnsTickleQueue(), idns_query::lru, lru_list, nameservers, idns_query::nsends, idns_query::pending, dlink_node::prev, idns_query::query_id, idns_query::queue_t, idns_query::rcode, rfc1035ErrorMessage(), idns_query::sent_t, idns_query::start_t, dlink_list::tail, SquidConfig::Timeout, tvSubDsec(), tvSubMsec(), and idns_query::xact_id.

idnsDoSendQueryVC()

static void idnsDoSendQueryVC ( nsvc *  vc )

static

Definition at line 817 of file dns_internal.cc.

References nsvc::busy, commCbCall(), commSetConnTimeout(), Config, nsvc::conn, MemBuf::contentSize(), Comm::Connection::fd, fd_table, SquidConfig::idns_query, idnsSentQueryVC, Store::nil, nsvc::queue, SquidConfig::Timeout, and Comm::Write().

Referenced by idnsInitVCConnected(), idnsSendQueryVC(), and idnsSentQueryVC().

idnsFindQuery()

static idns_query * idnsFindQuery ( unsigned short  id )

static

Definition at line 1031 of file dns_internal.cc.

References dlink_node::data, lru_list, dlink_node::prev, idns_query::query_id, and dlink_list::tail.

Referenced by idnsGrokReply(), and idnsQueryID().

idnsFreeSearchpath()

static void idnsFreeSearchpath ( void  )

static

Definition at line 388 of file dns_internal.cc.

References npc, npc_alloc, safe_free, and searchpath.

Referenced by idnsParseResolvConf(), and idnsShutdownAndFreeState().

idnsFromKnownNameserver()

static int idnsFromKnownNameserver ( Ip::Address const &  from )

static

Definition at line 1015 of file dns_internal.cc.

References nameservers, and Ip::Address::port().

Referenced by idnsRead().

idnsGrokReply()

static void idnsGrokReply ( const char *  buf, size_t  sz, int  from_ns  )

static

Definition at line 1161 of file dns_internal.cc.

References idns_query::ancount, _rfc1035_message::answer, assert, idns_query::attempt, idns_query::buf, DBG_IMPORTANT, debugs, dlinkDelete(), idns_query::do_searchpath, idns_query::domain, _sp::domain, Ip::EnableIpv6, _rfc1035_message::id, idnsCallback(), idnsCheckMDNS(), idnsFindQuery(), idnsQueryID(), idnsRcodeCount(), idnsSendQuery(), idnsSendSlaveAAAAQuery(), idns_query::lru, lru_list, idns_query::master, MAX_ATTEMPT, idns_query::message, min(), idns_query::name, _rfc1035_query::name, nameservers, idns_query::need_vc, npc, idns_query::nsends, idns_query::orig, idns_query::pending, _rfc1035_message::query, idns_query::query, idns_query::query_id, idns_query::rcode, RFC1035_DEFAULT_PACKET_SZ, rfc1035ErrorMessage(), rfc1035MessageDestroy(), rfc1035MessageUnpack(), rfc1035QueryCompare(), rfc3596BuildAQuery(), searchpath, server, idns_query::slave, idns_query::sz, and _rfc1035_message::tc.

Referenced by idnsRead(), and idnsReadVC().

idnsInitVC()

static void idnsInitVC ( size_t  nsv )

static

Definition at line 892 of file dns_internal.cc.

References SquidConfig::Addrs, assert, commCbCall(), Config, nsvc::conn, conn, SquidConfig::connect, idnsInitVCConnected, Ip::Address::isNoAddr(), nameservers, Comm::ConnOpener::setHost(), AsyncJob::Start(), SquidConfig::Timeout, SquidConfig::udp_incoming, and SquidConfig::udp_outgoing.

Referenced by idnsSendQueryVC().

idnsInitVCConnected()

static void idnsInitVCConnected ( const Comm::ConnectionPointer &  conn, Comm::Flag  status, int  , void *  data  )

static

Definition at line 850 of file dns_internal.cc.

References nsvc::busy, comm_add_close_handler(), comm_read(), commCbCall(), nsvc::conn, conn, DBG_IMPORTANT, debugs, idnsDoSendQueryVC(), idnsReadVCHeader, idnsVCClosed, MAX_IPSTRLEN, nsvc::msglen, nameservers, nsvc::ns, and Comm::OK.

idnsParseNameservers()

static bool idnsParseNameservers ( void  )

static

Definition at line 395 of file dns_internal.cc.

References Config, debugs, SquidConfig::dns, idnsAddNameserver(), Important, and SquidConfig::nameservers.

Referenced by Dns::Init().

idnsParseResolvConf()

static bool idnsParseResolvConf ( void  )

static

Definition at line 407 of file dns_internal.cc.

References _PATH_RESCONF, DBG_IMPORTANT, debugs, getMyHostname(), idnsAddNameserver(), idnsAddPathComponent(), idnsFreeSearchpath(), ndots, npc, RESOLV_BUFSZ, w_space, and xstrerr().

Referenced by Dns::Init().

idnsPTRLookup()

void idnsPTRLookup	(	const Ip::Address &	addr,
		IDNSCB *	callback,
		void *	data
	)

Definition at line 1804 of file dns_internal.cc.

References idns_query::buf, Config, debugs, SquidConfig::dns, SquidConfig::dns_mdns, Ip::Address::getInAddr(), idnsCachedLookup(), idnsCallbackOnEarlyError(), idnsQueryID(), idnsStartQuery(), Ip::Address::isIPv6(), MAX_IPSTRLEN, _rfc1035_query::name, SquidConfig::onoff, SquidConfig::packet_max, idns_query::permit_mdns, idns_query::query, idns_query::query_id, rfc3596BuildPTRQuery4(), rfc3596BuildPTRQuery6(), idns_query::sz, and Ip::Address::toStr().

Referenced by fqdncache_nbgethostbyaddr().

idnsQueryID()

static unsigned short idnsQueryID ( void  )

static

Definition at line 1047 of file dns_internal.cc.

References DBG_IMPORTANT, debugs, idnsFindQuery(), and RandomSeed32().

Referenced by idnsALookup(), idnsGrokReply(), idnsPTRLookup(), and idnsSendSlaveAAAAQuery().

idnsRcodeCount()

static void idnsRcodeCount ( int  rcode, int  attempt  )

static

Definition at line 1528 of file dns_internal.cc.

References MAX_ATTEMPT, MAX_RCODE, and RcodeMatrix.

Referenced by idnsGrokReply().

idnsRead()

static void idnsRead ( int  fd, void *    )

static

Definition at line 1311 of file dns_internal.cc.

References assert, COMM_SELECT_READ, comm_udp_recvfrom(), Config, DBG_IMPORTANT, debugs, fd_bytes(), FD_READ, dlink_list::head, idnsFromKnownNameserver(), idnsGrokReply(), idnsRead, SquidConfig::ignore_unknown_nameservers, ignoreErrno(), INCOMING_DNS_MAX, incoming_sockets_accepted, lru_list, max(), MYNAME, nameservers, SquidConfig::onoff, Comm::SetSelect(), squid_curtime, SQUID_UDP_SO_RCVBUF, and xstrerr().

idnsReadVC()

static void idnsReadVC ( const Comm::ConnectionPointer &  conn, char *  buf, size_t  len, Comm::Flag  flag, int  , void *  data  )

static

Definition at line 1451 of file dns_internal.cc.

References assert, MemBuf::buf, MemBuf::clean(), comm_read(), commCbCall(), conn, MemBuf::contentSize(), debugs, Comm::ERR_CLOSING, idnsGrokReply(), idnsReadVC, idnsReadVCHeader, Comm::IsConnOpen(), nsvc::msg, nsvc::msglen, nameservers, nsvc::ns, Comm::OK, and MemBuf::size.

idnsReadVCHeader()

static void idnsReadVCHeader ( const Comm::ConnectionPointer &  conn, char *  buf, size_t  len, Comm::Flag  flag, int  , void *  data  )

static

Definition at line 1484 of file dns_internal.cc.

References assert, MemBuf::buf, comm_read(), commCbCall(), conn, Comm::ERR_CLOSING, idnsReadVC, idnsReadVCHeader, MemBuf::init(), Comm::IsConnOpen(), nsvc::msg, nsvc::msglen, Comm::OK, and nsvc::read_msglen.

idnsSendQuery()

static void idnsSendQuery ( idns_query *  q )

static

Definition at line 944 of file dns_internal.cc.

References assert, idns_query::buf, comm_udp_sendto(), current_time, DBG_IMPORTANT, debugs, dlinkAdd(), DnsSocketA, DnsSocketB, fd_bytes(), FD_WRITE, idnsSendQueryVC(), idnsTickleQueue(), idns_query::lru, lru_list, MYNAME, nameservers, idns_query::need_vc, dlink_node::next, nns_mdns_count, idns_query::nsends, idns_query::pending, idns_query::permit_mdns, dlink_node::prev, idns_query::queue_t, idns_query::sent_t, idns_query::sz, and xstrerr().

Referenced by idnsCheckQueue(), idnsGrokReply(), idnsSendSlaveAAAAQuery(), and idnsStartQuery().

idnsSendQueryVC()

static void idnsSendQueryVC ( idns_query *  q, size_t  nsn  )

static

Definition at line 917 of file dns_internal.cc.

References MemBuf::append(), assert, idns_query::buf, DBG_IMPORTANT, debugs, head, idnsDoSendQueryVC(), idnsInitVC(), MAX_IPSTRLEN, nameservers, nsvc::queue, MemBuf::reset(), and idns_query::sz.

Referenced by idnsSendQuery().

idnsSendSlaveAAAAQuery()

static void idnsSendSlaveAAAAQuery ( idns_query *  q )

static

Definition at line 1720 of file dns_internal.cc.

References idns_query::buf, Config, debugs, SquidConfig::dns, idnsCheckMDNS(), idnsQueryID(), idnsSendQuery(), idns_query::master, idns_query::name, idns_query::orig, SquidConfig::packet_max, idns_query::query, idns_query::query_id, rfc3596BuildAAAAQuery(), idns_query::slave, idns_query::start_t, and idns_query::sz.

Referenced by idnsALookup(), and idnsGrokReply().

idnsSentQueryVC()

static void idnsSentQueryVC ( const Comm::ConnectionPointer &  conn, char *  , size_t  size, Comm::Flag  flag, int  , void *  data  )

static

Definition at line 796 of file dns_internal.cc.

References nsvc::busy, conn, Comm::ERR_CLOSING, fd_table, idnsDoSendQueryVC(), Comm::IsConnOpen(), Comm::OK, and size.

idnsShutdownAndFreeState()

static void idnsShutdownAndFreeState ( const char *  reason )

static

Definition at line 1635 of file dns_internal.cc.

References comm_close, debugs, DnsSocketA, DnsSocketB, idnsFreeSearchpath(), Comm::IsConnOpen(), nameservers, and server.

Referenced by Dns::ConfigRr::endingShutdown(), and Dns::ConfigRr::startReconfigure().

idnsStartQuery()

static void idnsStartQuery ( idns_query *  q, IDNSCB *  callback, void *  data  )

static

Definition at line 1707 of file dns_internal.cc.

References idns_query::callback, idns_query::callback_data, cbdataReference, current_time, idns_query::hash, hash_join(), idns_lookup_hash, idnsSendQuery(), hash_link::key, idns_query::orig, and idns_query::start_t.

Referenced by idnsALookup(), and idnsPTRLookup().

idnsStats()

static void idnsStats ( StoreEntry *  sentry )

static

Definition at line 709 of file dns_internal.cc.

References Config, current_time, dlink_node::data, SquidConfig::dns, dlink_list::head, int, lru_list, MAX_ATTEMPT, MAX_IPSTRLEN, MAX_RCODE, idns_query::name, nameservers, dlink_node::next, npc, idns_query::nsends, SquidConfig::packet_max, idns_query::permit_mdns, idns_query::query_id, RcodeMatrix, Rcodes, searchpath, idns_query::sent_t, server, idns_query::start_t, storeAppendPrintf(), idns_query::sz, and tvSubDsec().

idnsStillPending()

static bool idnsStillPending ( const idns_query *  master )

static

Returns

whether master or associated queries are still waiting for replies

Definition at line 1069 of file dns_internal.cc.

References assert, idns_query::master, and idns_query::slave.

Referenced by idnsCachedLookup(), and idnsCallback().

idnsTickleQueue()

static void idnsTickleQueue ( void  )

static

Definition at line 780 of file dns_internal.cc.

References Config, event_queued, eventAdd(), SquidConfig::idns_query, SquidConfig::idns_retransmit, idnsCheckQueue, lru_list, min(), dlink_list::tail, and SquidConfig::Timeout.

Referenced by idnsCheckQueue(), and idnsSendQuery().

idnsVCClosed()

static void idnsVCClosed ( const CommCloseCbParams &  params )

static

Definition at line 873 of file dns_internal.cc.

References nsvc::conn, CommCommonCbParams::data, and Comm::Connection::noteClosure().

InstanceIdDefinitions()

InstanceIdDefinitions	(	idns_query	,
		"dns"
	)

operator<<()

static std::ostream & operator<< ( std::ostream &  os, const idns_query &  answered  )

static

Definition at line 1079 of file dns_internal.cc.

References idns_query::ancount, and idns_query::error.

snmp_netDnsFn()

variable_list * snmp_netDnsFn	(	variable_list *	Var,
		snint *	ErrP
	)

Definition at line 1848 of file dns_internal.cc.

References debugs, DNS_REP, DNS_REQ, DNS_SERVERS, LEN_SQ_NET, variable_list::name, variable_list::name_length, nameservers, server, SMI_COUNTER32, SNMP_ERR_NOERROR, SNMP_ERR_NOSUCHNAME, snmp_var_new_integer(), and snmpDebugOid().

Referenced by snmpInit().

Variable Documentation

event_queued

int event_queued = 0

static

Definition at line 229 of file dns_internal.cc.

Referenced by idnsCheckQueue(), and idnsTickleQueue().

idns_lookup_hash

hash_table* idns_lookup_hash = nullptr

static

Definition at line 230 of file dns_internal.cc.

Referenced by idnsCachedLookup(), idnsCallback(), idnsStartQuery(), and Dns::Init().

idnsCheckQueue

EVH idnsCheckQueue

static

Definition at line 283 of file dns_internal.cc.

Referenced by idnsTickleQueue().

idnsInitVCConnected

CNCB idnsInitVCConnected

static

Definition at line 275 of file dns_internal.cc.

Referenced by idnsInitVC().

idnsRead

PF idnsRead

static

Definition at line 282 of file dns_internal.cc.

Referenced by idnsRead(), and Dns::Init().

idnsReadVC

IOCB idnsReadVC

static

Definition at line 276 of file dns_internal.cc.

Referenced by idnsReadVC(), and idnsReadVCHeader().

idnsReadVCHeader

IOCB idnsReadVCHeader

static

Definition at line 273 of file dns_internal.cc.

Referenced by idnsInitVCConnected(), idnsReadVC(), and idnsReadVCHeader().

idnsSentQueryVC

IOCB idnsSentQueryVC

static

Definition at line 277 of file dns_internal.cc.

Referenced by idnsDoSendQueryVC().

idnsStats

OBJH idnsStats

static

Definition at line 260 of file dns_internal.cc.

Referenced by Dns::Init().

idnsVCClosed

CLCB idnsVCClosed

static

Definition at line 286 of file dns_internal.cc.

Referenced by idnsInitVCConnected().

lru_list

dlink_list lru_list

static

Definition at line 228 of file dns_internal.cc.

Referenced by idnsCheckQueue(), idnsFindQuery(), idnsGrokReply(), idnsRead(), idnsSendQuery(), idnsStats(), and idnsTickleQueue().

nameservers

std::vector<ns> nameservers

static

Definition at line 222 of file dns_internal.cc.

Referenced by nsvc::~nsvc(), idnsAddMDNSNameservers(), idnsAddNameserver(), idnsCheckQueue(), idnsFromKnownNameserver(), idnsGrokReply(), idnsInitVC(), idnsInitVCConnected(), idnsRead(), idnsReadVC(), idnsSendQuery(), idnsSendQueryVC(), idnsShutdownAndFreeState(), idnsStats(), Dns::Init(), and snmp_netDnsFn().

ndots

int ndots = 1

static

Definition at line 227 of file dns_internal.cc.

Referenced by idnsALookup(), and idnsParseResolvConf().

nns_mdns_count

int nns_mdns_count = 0

static

Definition at line 224 of file dns_internal.cc.

Referenced by idnsAddMDNSNameservers(), and idnsSendQuery().

npc

int npc = 0

static

Definition at line 225 of file dns_internal.cc.

Referenced by idnsAddPathComponent(), idnsALookup(), idnsFreeSearchpath(), idnsGrokReply(), idnsParseResolvConf(), and idnsStats().

npc_alloc

int npc_alloc = 0

static

Definition at line 226 of file dns_internal.cc.

Referenced by idnsAddPathComponent(), and idnsFreeSearchpath().

RcodeMatrix

int RcodeMatrix[MAX_RCODE][MAX_ATTEMPT]

static

Definition at line 79 of file dns_internal.cc.

Referenced by idnsRcodeCount(), idnsStats(), and Dns::Init().

Rcodes

const char* Rcodes[]

static

Initial value:

= {
    
    "Success",
    "Packet Format Error",
    "DNS Server Failure",
    "Non-Existent Domain",
    "Not Implemented",
    "Query Refused",
    
    "Name Exists when it should not",
    "RR Set Exists when it should not",
    "RR Set that should exist does not",
    "Server Not Authoritative for zone",
    "Name not contained in zone",
    
    "","","","","",
    
    "Bad OPT Version or TSIG Signature Failure"
}

Definition at line 81 of file dns_internal.cc.

Referenced by idnsStats().

searchpath

sp* searchpath = nullptr

static

Definition at line 223 of file dns_internal.cc.

Referenced by idnsAddPathComponent(), idnsALookup(), idnsFreeSearchpath(), idnsGrokReply(), and idnsStats().