After discussions with Greg N1DAM I have changed the dual stack
support to explicitly allow IPv4 connections mapped to IPv6 for any
AF_INET6 address since BSD as well as Windows defaults this socket
option to on (disallowed).
IPv4 mapped to IPv6 makes sense for Hamlib servers since starting two
servers one for each protocol family (the other option) is not
possible since there is only a single rig/rotator which cannot be
shared between two servers.
This means that rigctl & rigctld now work with default arguments on a
modern Windows machine with dual stack and localhost being [::1] as
the first interface returned by getaddrinfo().
Try all the interfaces return by DNS lookups to establish a connection
or listening port. Handle Windows network errors correctly so that
meaningful messages are printed.
The rigctl program now accepts IPv6 numeric addresses in the portname
field like [<addr>}:<port> for example the IPv6 loopback on port 4531
would be [::1]:4531.
Use the system gettaddrinfo function when possible as before. Tested on
GNU, Cygwin, MinGW on Linux, and MinGW on Windows. Under MinGW the
replacement getaddrinfo is used. Perhaps this is an area for
investigation to be certain MinGW really doesn't supply getaddrinfo.
This reverts some of the patches from Remi Chateauneu in commit
60019c9. This fixes build issues encountered building the Windows
binary daily snapshots.
Enabled static library build by default at configure time.
Fixed pthread library linking for the ars backend on MinGW.
Trying to run the pthread enabled binaries on W2k resulted in an error
dialog with the text, "The procedure entry point freeaddrinfo could not be
located in ws2_32.dll". A Microsoft support page
(http://support.microsoft.com/kb/955045) hints that when 'ws2tcpip.h' is
included that 'wspiapi.h' should be included as well. Since MinGw
includes both files, this patch corrects the runtime error on W2k
Various strncpy operations could result in a port pathname that is not a
NULL terminated string as the allowed string length is the same size as
the buffer per the strncpy manual page. This is corrected by assuring
that the allowed length is FILPATHLEN - 1.
Sockets under Windows require specific startup and cleanup calls.
Besides, the standard fdopen() does no work on socket descriptors,
and has to be worked around thanks to _open_osfhandle().
