painlessmesh::gateway::NegativeDnsCache Class Reference

A few hosts that recently failed to resolve, and when. More...

#include <gateway.hpp>

Public Types
enum	: size_t { SLOTS = 4 }

Public Member Functions
void	remember (const TSTRING &host, uint32_t nowMs, uint32_t ttlMs=GATEWAY_DNS_NEGATIVE_TTL_MS)
bool	isFailing (const TSTRING &host, uint32_t nowMs, uint32_t *ageMs=nullptr)
void	forget (const TSTRING &host)
size_t	size () const

Detailed Description

A few hosts that recently failed to resolve, and when.

Small and fixed: a gateway talks to a handful of destinations. A host is remembered with a TTL; while it is within it, isFailing() says so and the caller answers the request without a lookup.

Member Enumeration Documentation

anonymous enum

anonymous enum : size_t

Enumerator
SLOTS

Member Function Documentation

forget()

void painlessmesh::gateway::NegativeDnsCache::forget ( const TSTRING &  host )

inline

isFailing()

bool painlessmesh::gateway::NegativeDnsCache::isFailing ( const TSTRING &  host, uint32_t  nowMs, uint32_t *  ageMs = nullptr  )

inline

Is host inside its negative TTL? ageMs receives how long ago it failed.

remember()

void painlessmesh::gateway::NegativeDnsCache::remember ( const TSTRING &  host, uint32_t  nowMs, uint32_t  ttlMs = GATEWAY_DNS_NEGATIVE_TTL_MS  )

inline

size()

size_t painlessmesh::gateway::NegativeDnsCache::size ( ) const

inline

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The documentation for this class was generated from the following file:

• src/painlessmesh/gateway.hpp