For orthogonality, we change sin -> s_in and sin6 -> s_in6 as well.
Reviewed-by: NMatt Caswell <matt@openssl.org>

The actual bug with current getnameinfo() on VMS is not that it puts
gibberish in the service buffer, but that it doesn't touch it at all.
The gibberish we dealt with before was simply stuff that happened to
be on the stack.

It's better to initialise the service buffer properly (with the empty
string) and check if it's still an empty string after the
getnameinfo() call, and fill it with the direct numerical translation
of the raw port if that's the case.
Reviewed-by: NRich Salz <rsalz@openssl.org>

As noted already, some platforms don't fill in ai_protocol as
expected.  To circumvent that, we have BIO_ADDRINFO_protocol() to
compute a sensible answer in that case.
Reviewed-by: NKurt Roeckx <kurt@openssl.org>

It seems like it gives back gibberish.  If we asked for a numeric
service, it's easy to check for a digit in the first position, and
if there isn't any, rewrite it using older methods.
Reviewed-by: NRich Salz <rsalz@openssl.org>

- One typo fixed in crypto/bio/b_addr.c
- Add a comment in doc/crypto/BIO_parse_hostserv.pod to explain the
  blank lines with one lonely space each.
Reviewed-by: NAndy Polyakov <appro@openssl.org>

Don't cast malloc-family return values.
Also found some places where (a) blank line was missing; and (b)
the *wrong* return value was checked.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

	(if priority is set to host)
Signed-off-by: NRichard Levitte <levitte@openssl.org>
Reviewed-by: NAndy Polyakov <appro@openssl.org>
Reviewed-by: NRich Salz <rsalz@openssl.org>

Adds a new function BIO_ADDR_clear to reset a BIO_ADDR back to an
unitialised state, and to set the family to AF_UNSPEC.
Reviewed-by: NViktor Dukhovni <viktor@openssl.org>

Both getaddrinfo() and getnameinfo() have to be preceeded with a call
to BIO_sock_init().

Also, make sure to give gai_strerror() the actual error code.
Reviewed-by: NStephen Henson <steve@openssl.org>

Windows doesn't have h_error or hstrerror()
Reviewed-by: NRichard Levitte <levitte@openssl.org>

MR: #1848

Reviewed-by: NRichard Levitte <levitte@openssl.org>

MR: #1841

Because different platforms have different levels of support for IPv6,
different kinds of sockaddr variants, and some have getaddrinfo et al
while others don't, we could end up with a mess if ifdefs, duplicate
code and other maintainance nightmares.

Instead, we're introducing wrappers around the common form for socket
communication:
BIO_ADDR, closely related to struct sockaddr and some of its variants.
BIO_ADDRINFO, closely related to struct addrinfo.

With that comes support routines, both convenient creators and
accessors, plus a few utility functions:

BIO_parse_hostserv, takes a string of the form host:service and
splits it into host and service.  It checks for * in both parts, and
converts any [ipv6-address] syntax to ust the IPv6 address.

BIO_lookup, looks up information on a host.

All routines handle IPv4 (AF_INET) and IPv6 (AF_INET6) addresses, and
there is support for local sockets (AF_UNIX) as well.
Reviewed-by: NKurt Roeckx <kurt@openssl.org>