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Remove configure probe for sockaddr_in6 and require AF_INET6.

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SUSv3 <netinet/in.h> defines struct sockaddr_in6, and all targeted Unix
systems have it.  Windows has it in <ws2ipdef.h>.  Remove the configure
probe, the macro and a small amount of dead code.

Also remove a mention of IPv6-less builds from the documentation, since
there aren't any.

This is similar to commits f5580882 and 077bf2f2 for Unix sockets.  Even
though AF_INET6 is an "optional" component of SUSv3, there are no known
modern operating system without it, and it seems even less likely to be
omitted from future systems than AF_UNIX.

Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/CA+hUKGKErNfhmvb_H0UprEmp4LPzGN06yR2_0tYikjzB-2ECMw@mail.gmail.com
This commit is contained in:
Thomas Munro
2022-08-26 10:13:22 +12:00
parent 28ec316787
commit bcc8b14ef6
16 changed files with 7 additions and 105 deletions
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5
src/port/inet_net_ntop.c
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@@ -80,15 +80,14 @@ pg_inet_net_ntop(int af, const void *src, int bits, char *dst, size_t size)
* We need to cover both the address family constants used by the PG inet
* type (PGSQL_AF_INET and PGSQL_AF_INET6) and those used by the system
* libraries (AF_INET and AF_INET6). We can safely assume PGSQL_AF_INET
* == AF_INET, but the INET6 constants are very likely to be different. If
* AF_INET6 isn't defined, silently ignore it.
* == AF_INET, but the INET6 constants are very likely to be different.
*/
switch (af)
{
case PGSQL_AF_INET:
return (inet_net_ntop_ipv4(src, bits, dst, size));
case PGSQL_AF_INET6:
#if defined(AF_INET6) && AF_INET6 != PGSQL_AF_INET6
#if AF_INET6 != PGSQL_AF_INET6
case AF_INET6:
#endif
return (inet_net_ntop_ipv6(src, bits, dst, size));