(SendARP): Define.
* cygwin.din: Export if_freenameindex, if_indextoname, if_nameindex and
if_nametoindex.
* fhandler_procnet.cc: Drop including wchar.h. Drop definitions of
GAA_FLAG_INCLUDE_ALL_INTERFACES, IP_ADAPTER_UNICAST_ADDRESS_VISTA.
(fhandler_procnet::exists): Check for has_gaa_prefixes. Call
get_adapters_addresses here.
(fhandler_procnet::readdir): Ditto.
(prefix): Move to net.cc.
(fhandler_procnet::fill_filebuf): Call get_adapters_addresses here.
Simplify allocation. Use AdapterName rather than FriendlyName as
interface name. Use IfIndex if available, Ipv6IfIndex otherwise.
(in6_are_prefix_equal): Move to net.cc.
* fhandler_socket.cc: Define old SIOCGxxx values.
(CONV_OLD_TO_NEW_SIO): Convert old SIOCGxxx value to new one.
(struct __old_ifreq): Define old struct ifreq.
(fhandler_socket::ioctl): Handle old SIOCGxxx values. Handle new
SIOCGIFFRNDLYNAM command. Simplify copying ifreq data to user space.
Call get_ifconf with additional SOCKET parameter.
* net.cc (IP_ADAPTER_UNICAST_ADDRESS_LH): Define.
(IP_ADAPTER_ADDRESSES_LH): Define.
(SIO_GET_INTERFACE_LIST): Define.
(sockaddr_in6_old): Define.
(sockaddr_gen): Define.
(INTERFACE_INFO): Define.
(IN_LOOPBACK): Define.
(in_are_prefix_equal): New static function.
(ip_addr_prefix): New function, replaces prefix function, add AF_INET
handling.
(GAA_FLAG_INCLUDE_ALL_INTERFACES): Define.
(get_adapters_addresses): New function.
(WS_IFF_xxx): Define Winsock interface flag values.
(convert_ifr_flags): New function to convert Winsock interface flag
values to Cygwin interface flag values.
(get_xp_ifconf): New get_ifconf implementation for XP SP1 and above.
(get_2k_ifconf): Fix interface index. Fix formatting.
(get_nt_ifconf): Fix formatting.
(get_95_ifconf): Ditto.
(get_ifconf): Take additional SOCKET parameter. Call get_xp_ifconf
on XP SP1 and above.
(if_nametoindex): New function.
(if_indextoname): New function.
(if_nameindex): New function.
(if_freenameindex): New function.
(in6_are_prefix_equal): Moved here from fhandler_procnet.cc.
* wincap.cc (wincap_xp): Define has_gaa_prefixes as true by default.
(wincapc::init): Assume has_osversioninfoex by default. Call
GetVersionEx with OSVERSIONINFOEX first. Call with OSVERSIONINFO only
if that fails. Simplify NT4 case and try to avoid strcmp. Check XP
Service Pack using version.wServicePackMajor to avoid strcmp.
* include/asm/socket.h (SIOCGIFFRNDLYNAM): Define.
* include/cygwin/if.h: Fix formatting.
(IFF_POINTTOPOINT): Define.
(IFF_NOARP): Define.
(IFF_LOWER_UP): Define.
(IFF_DORMANT): Define.
(struct if_nameindex): Define.
(IFRF_FRIENDLYNAMESIZ): Define.
(struct ifreq_frndlyname): Define.
(IFNAMSIZ): Redefine as 44.
(IF_NAMESIZE): Define.
(struct ifreq): Redefine ifru_flags as int. Define ifru_data. Pad size
to sizeof sockaddr_in6 for further extensions.
(ifr_data): Define.
(ifr_frndlyname): Define.
(if_nametoindex): Declare.
(if_indextoname): Declare.
(if_nameindex): Declare.
(if_freenameindex): Declare.
* include/cygwin/version.h: Bump API minor number.
(CYGWIN_VERSION_CHECK_FOR_OLD_IFREQ): Define check for old vs. new
ifreq structure.
