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refactor(netxlite): introduce the getaddrinfo transport (#775)

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This diff modifies the system resolver to use a getaddrinf transport.

Obviously the transport is a fake, but its existence will allow us
to observe DNS events more naturally.

A lookup using the system resolver would be a ANY lookup that will
contain all the resolved IP addresses into the same response.

This change was also part of websteps-illustrated, albeit the way in
which I did it there was less clean than what we have here.

Ref issue: https://github.com/ooni/probe/issues/2096
This commit is contained in:
Simone Basso 2022-06-01 09:59:44 +02:00 • committed by GitHub
commit 923d81cdee
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14 changed files with 432 additions and 163 deletions
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43
internal/netxlite/legacy.go
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@ -10,32 +10,33 @@ package netxlite
var (
DefaultDialer = &DialerSystem{}
DefaultTLSHandshaker = defaultTLSHandshaker
NewResolverSystem = newResolverSystem
NewConnUTLS = newConnUTLS
DefaultResolver = &resolverSystem{}
DefaultResolver = newResolverSystem()
)
// These types export internal names to legacy ooni/probe-cli code.
//
// Deprecated: do not use these names in new code.
type (
DialerResolver = dialerResolver
DialerLogger = dialerLogger
HTTPTransportWrapper = httpTransportConnectionsCloser
HTTPTransportLogger = httpTransportLogger
ErrorWrapperDialer = dialerErrWrapper
ErrorWrapperQUICListener = quicListenerErrWrapper
ErrorWrapperQUICDialer = quicDialerErrWrapper
ErrorWrapperResolver = resolverErrWrapper
ErrorWrapperTLSHandshaker = tlsHandshakerErrWrapper
QUICListenerStdlib = quicListenerStdlib
QUICDialerQUICGo = quicDialerQUICGo
QUICDialerResolver = quicDialerResolver
QUICDialerLogger = quicDialerLogger
ResolverSystem = resolverSystem
ResolverLogger = resolverLogger
ResolverIDNA = resolverIDNA
TLSHandshakerConfigurable = tlsHandshakerConfigurable
TLSHandshakerLogger = tlsHandshakerLogger
TLSDialerLegacy = tlsDialer
AddressResolver = resolverShortCircuitIPAddr
DialerResolver = dialerResolver
DialerLogger = dialerLogger
HTTPTransportWrapper = httpTransportConnectionsCloser
HTTPTransportLogger = httpTransportLogger
ErrorWrapperDialer = dialerErrWrapper
ErrorWrapperQUICListener = quicListenerErrWrapper
ErrorWrapperQUICDialer = quicDialerErrWrapper
ErrorWrapperResolver = resolverErrWrapper
ErrorWrapperTLSHandshaker = tlsHandshakerErrWrapper
QUICListenerStdlib = quicListenerStdlib
QUICDialerQUICGo = quicDialerQUICGo
QUICDialerResolver = quicDialerResolver
QUICDialerLogger = quicDialerLogger
ResolverSystemDoNotInstantiate = resolverSystem // instantiate => crash w/ nil transport
ResolverLogger = resolverLogger
ResolverIDNA = resolverIDNA
TLSHandshakerConfigurable = tlsHandshakerConfigurable
TLSHandshakerLogger = tlsHandshakerLogger
TLSDialerLegacy = tlsDialer
AddressResolver = resolverShortCircuitIPAddr
)