Evan Hunt
b6d40b3c4e
correct TCP error handling in dispatch and resolver
...
- certain TCP result codes, including ISC_R_EOF and
ISC_R_CONNECTIONRESET, were being mapped to ISC_R_SHUTTINGDOWN
before calling the response handler in tcp_recv_cancelall().
the result codes should be passed through to the response handler
without being changed.
- the response handlers, resquery_response() and req_response(), had
code to return immediately if encountering ISC_R_EOF, but this is
not the correct behavior; that should only happen in the case of
ISC_R_CANCELED when it was the caller that canceled the operation
- ISC_R_CONNECTIONRESET was not being caught in rctx_dispfail().
- removed code in rctx_dispfail() to retry queries without EDNS
when receiving ISC_R_EOF; this is now treated the same as any
other connection failure.
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