Lookup

Lookup overloads

Synopses

Declared in <netbase.h>

Resolve a service string to its first corresponding service.

std::optional<CService>
Lookup(
    std::string const& name,
    uint16_t portDefault,
    bool fAllowLookup,
    DNSLookupFn dns_lookup_function = g_dns_lookup);
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Resolve a service string to its corresponding service.

std::vector<CService>
Lookup(
    std::string const& name,
    uint16_t portDefault,
    bool fAllowLookup,
    unsigned int nMaxSolutions,
    DNSLookupFn dns_lookup_function = g_dns_lookup);
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Return Value

  • The first resolved service, or std::nullopt if the string does not resolve.
  • The resulting services to which the specified service string resolved.

Parameters

NameDescription
nameThe service string to resolve.
portDefaultThe port to use when the service string omits one.
fAllowLookupWhether DNS lookups are permitted.
dns_lookup_functionThe resolver used to perform the lookup.
nMaxSolutionsThe maximum number of results we want, specifying 0 means "as many solutions as we get."

See Also

Lookup(const std::string&, uint16_t, bool, unsigned int, DNSLookupFn) for additional parameter descriptions.