Receiving Error Domain=kCFErrorDomainCFNetwork Code=2 when attempting to read from ReadStream

Question

I\'m attempting to synchronously read from a CFReadStream objected created by CFStreamCreatePairWithSocketToHost. The stream opened fine but when I

Answer 1

The short story: Probably a DNS resolution failure.

The docs say "The streams do not open a connection to the specified host until one of the streams is opened", and for kCFGetAddrInfoFailureKey,

Querying this key returns the last error code returned by getaddrinfo(3) in response to a DNS lookup. To interpret the results, look up the error code in /usr/include/netdb.h.

netdb.h says

#define EAI_NONAME  8  /* hostname nor servname provided, or not known */