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由 Richard Levitte 提交于
s_socket.c gets brutally cleaned out and now consists of only two functions, one for client and the other for server. They both handle AF_INET, AF_INET6 and additionally AF_UNIX where supported. The rest is just easy adaptation. Both s_client and s_server get the new flags -4 and -6 to force the use of IPv4 or IPv6 only. Also, the default host "localhost" in s_client is removed. It's not certain that this host is set up for both IPv4 and IPv6. For example, Debian has "ip6-localhost" as the default hostname for [::1]. The better way is to default |host| to NULL and rely on BIO_lookup() to return a BIO_ADDRINFO with the appropriate loopback address for IPv4 or IPv6 as indicated by the |family| parameter. Reviewed-by: NKurt Roeckx <kurt@openssl.org>
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