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SynWinSock.pas
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/// low level access to network Sockets for the Win32 platform
// - this unit is a part of the freeware Synopse framework,
// licensed under a MPL/GPL/LGPL tri-license; version 1.18
unit SynWinSock;
{
This file is part of Synopse framework.
Synopse framework. Copyright (C) 2019 Arnaud Bouchez
Synopse Informatique - https://synopse.info
*** BEGIN LICENSE BLOCK *****
Version: MPL 1.1/GPL 2.0/LGPL 2.1
The contents of this file are subject to the Mozilla Public License Version
1.1 (the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.mozilla.org/MPL
Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
for the specific language governing rights and limitations under the License.
The Original Code is Synapse library.
The Initial Developer of the Original Code is Lukas Gebauer (Czech Republic).
Portions created by Lukas Gebauer are Copyright (C) 2003.
All Rights Reserved.
Portions created by Arnaud Bouchez are Copyright (C) 2019 Arnaud Bouchez.
All Rights Reserved.
Contributor(s):
Alternatively, the contents of this file may be used under the terms of
either the GNU General Public License Version 2 or later (the "GPL"), or
the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
in which case the provisions of the GPL or the LGPL are applicable instead
of those above. If you wish to allow use of your version of this file only
under the terms of either the GPL or the LGPL, and not to allow others to
use your version of this file under the terms of the MPL, indicate your
decision by deleting the provisions above and replace them with the notice
and other provisions required by the GPL or the LGPL. If you do not delete
the provisions above, a recipient may use your version of this file under
the terms of any one of the MPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****
Low level access to network Sockets
*************************************
Contributor(s):
- Arnaud Bouchez, Jan 2009, for SynCrtSock: see https://synopse.info
Delphi 2009/2010 compatibility (Jan 2010): the WinSock library
expects Ansi encoded parameters
Version 1.18
- fixed ticket [f79ff5714b] about potential finalization issues as .bpl in IDE
- fixed Win64 compatibility issue
}
{.$DEFINE WINSOCK1}
{If you activate this compiler directive, then socket interface level 1.1 is
used instead default level 2.2. Level 2.2 is not available on old W95, however
you can install an update from microsoft}
{.$DEFINE FORCEOLDAPI}
{If you activate this compiler directive, then is allways used old socket API
for name resolution. If you leave this directive inactive, then the new API
is used, when running system allows it. For IPv6 support you must have the new API! }
{$I Synopse.inc} // define HASINLINE USETYPEINFO CPU32 CPU64 OWNNORMTOUPPER
interface
uses
SysUtils,
Classes,
Windows;
function InitSocketInterface(const stack: TFileName=''): Boolean;
function DestroySocketInterface: Boolean;
const
{$ifdef WINSOCK1}
WinsockLevel = $0101;
{$ELSE}
WinsockLevel = $0202;
{$endif}
type
u_char = AnsiChar;
u_short = Word;
u_int = integer;
u_long = Longint;
pu_long = ^u_long;
pu_short = ^u_short;
{$ifdef FPC}
TSocket = PtrInt;
{$else}
{$ifdef UNICODE}
TSocket = NativeInt;
{$else}
TSocket = integer;
{$endif UNICODE}
{$endif}
const
{$ifdef WINSOCK1}
DLLStackName: PChar = 'wsock32.dll';
{$ELSE}
DLLStackName: PChar = 'ws2_32.dll';
{$endif}
DLLwship6: PChar = 'wship6.dll';
DLLSecur32: PChar = 'secur32.dll';
cLocalhost = '127.0.0.1';
cAnyHost = '0.0.0.0';
cBroadcast = '255.255.255.255';
c6Localhost = '::1';
c6AnyHost = '::0';
c6Broadcast = 'ffff::1';
cAnyPort = '0';
const
FD_SETSIZE = 64;
type
PFDSet = ^TFDSet;
TFDSet = record
fd_count: u_int;
fd_array: array[0..FD_SETSIZE-1] of TSocket;
end;
const
FIONREAD = $4004667f;
FIONBIO = $8004667e;
FIOASYNC = $8004667d;
type
PTimeVal = ^TTimeVal;
TTimeVal = record
tv_sec: Longint;
tv_usec: Longint;
end;
const
IPPROTO_IP = 0; { Dummy }
IPPROTO_ICMP = 1; { Internet Control Message Protocol }
IPPROTO_IGMP = 2; { Internet Group Management Protocol}
IPPROTO_TCP = 6; { TCP }
IPPROTO_UDP = 17; { User Datagram Protocol }
IPPROTO_IPV6 = 41;
IPPROTO_ICMPV6 = 58;
IPPROTO_RAW = 255;
IPPROTO_MAX = 256;
type
PInAddr = ^TInAddr;
TInAddr = packed record
case integer of
0: (S_bytes: packed array [0..3] of byte);
1: (S_addr: u_long);
end;
PSockAddrIn = ^TSockAddrIn;
TSockAddrIn = packed record
case integer of
0: (sin_family: u_short;
sin_port: u_short;
sin_addr: TInAddr;
sin_zero: array[0..7] of AnsiChar);
1: (sa_family: u_short;
sa_data: array[0..13] of AnsiChar)
end;
TIP_mreq = record
imr_multiaddr: TInAddr; { IP multicast address of group }
imr_interface: TInAddr; { local IP address of interface }
end;
PInAddr6 = ^TInAddr6;
TInAddr6 = packed record
case integer of
0: (S6_addr: packed array [0..15] of byte);
1: (u6_addr8: packed array [0..15] of byte);
2: (u6_addr16: packed array [0..7] of word);
3: (u6_addr32: packed array [0..3] of integer);
end;
PSockAddrIn6 = ^TSockAddrIn6;
TSockAddrIn6 = packed record
sin6_family: u_short; // AF_INET6
sin6_port: u_short; // Transport level port number
sin6_flowinfo: u_long; // IPv6 flow information
sin6_addr: TInAddr6; // IPv6 address
sin6_scope_id: u_long; // Scope Id: IF number for link-local
// SITE id for site-local
end;
TIPv6_mreq = record
ipv6mr_multiaddr: TInAddr6; // IPv6 multicast address.
ipv6mr_interface: integer; // Interface index.
padding: integer;
end;
PHostEnt = ^THostEnt;
THostEnt = packed record
h_name: PAnsiChar;
h_aliases: ^PAnsiChar;
h_addrtype: Smallint;
h_length: Smallint;
case integer of
0: (h_addr_list: ^PAnsiChar);
1: (h_addr: ^PInAddr);
end;
PNetEnt = ^TNetEnt;
TNetEnt = packed record
n_name: PAnsiChar;
n_aliases: ^PAnsiChar;
n_addrtype: Smallint;
n_net: u_long;
end;
PServEnt = ^TServEnt;
TServEnt = packed record
s_name: PAnsiChar;
s_aliases: ^PAnsiChar;
s_port: Smallint;
s_proto: PAnsiChar;
end;
PProtoEnt = ^TProtoEnt;
TProtoEnt = packed record
p_name: PAnsiChar;
p_aliases: ^PAnsiChar;
p_proto: Smallint;
end;
const
INADDR_ANY = $00000000;
INADDR_LOOPBACK = $7F000001;
INADDR_BROADCAST = $FFFFFFFF;
INADDR_NONE = $FFFFFFFF;
ADDR_ANY = INADDR_ANY;
INVALID_SOCKET = TSocket(NOT(0));
SOCKET_ERROR = -1;
Const
{$ifdef WINSOCK1}
IP_OPTIONS = 1;
IP_MULTICAST_IF = 2; { set/get IP multicast interface }
IP_MULTICAST_TTL = 3; { set/get IP multicast timetolive }
IP_MULTICAST_LOOP = 4; { set/get IP multicast loopback }
IP_ADD_MEMBERSHIP = 5; { add an IP group membership }
IP_DROP_MEMBERSHIP = 6; { drop an IP group membership }
IP_TTL = 7; { set/get IP Time To Live }
IP_TOS = 8; { set/get IP Type Of Service }
IP_DONTFRAGMENT = 9; { set/get IP Don't Fragment flag }
{$ELSE}
IP_OPTIONS = 1;
IP_HDRINCL = 2;
IP_TOS = 3; { set/get IP Type Of Service }
IP_TTL = 4; { set/get IP Time To Live }
IP_MULTICAST_IF = 9; { set/get IP multicast interface }
IP_MULTICAST_TTL = 10; { set/get IP multicast timetolive }
IP_MULTICAST_LOOP = 11; { set/get IP multicast loopback }
IP_ADD_MEMBERSHIP = 12; { add an IP group membership }
IP_DROP_MEMBERSHIP = 13; { drop an IP group membership }
IP_DONTFRAGMENT = 14; { set/get IP Don't Fragment flag }
{$endif}
IP_DEFAULT_MULTICAST_TTL = 1; { normally limit m'casts to 1 hop }
IP_DEFAULT_MULTICAST_LOOP = 1; { normally hear sends if a member }
IP_MAX_MEMBERSHIPS = 20; { per socket; must fit in one mbuf }
SOL_SOCKET = $ffff; {options for socket level }
{ Option flags per-socket. }
SO_DEBUG = $0001; { turn on debugging info recording }
SO_ACCEPTCONN = $0002; { socket has had listen() }
SO_REUSEADDR = $0004; { allow local address reuse }
SO_KEEPALIVE = $0008; { keep connections alive }
SO_DONTROUTE = $0010; { just use interface addresses }
SO_BROADCAST = $0020; { permit sending of broadcast msgs }
SO_USELOOPBACK = $0040; { bypass hardware when possible }
SO_LINGER = $0080; { linger on close if data present }
SO_OOBINLINE = $0100; { leave received OOB data in line }
SO_DONTLINGER = $ff7f;
{ Additional options. }
SO_SNDBUF = $1001; { send buffer size }
SO_RCVBUF = $1002; { receive buffer size }
SO_SNDLOWAT = $1003; { send low-water mark }
SO_RCVLOWAT = $1004; { receive low-water mark }
SO_SNDTIMEO = $1005; { send timeout }
SO_RCVTIMEO = $1006; { receive timeout }
SO_ERROR = $1007; { get error status and clear }
SO_TYPE = $1008; { get socket type }
{ WinSock 2 extension -- new options }
SO_GROUP_ID = $2001; { ID of a socket group}
SO_GROUP_PRIORITY = $2002; { the relative priority within a group}
SO_MAX_MSG_SIZE = $2003; { maximum message size }
SO_PROTOCOL_INFOA = $2004; { WSAPROTOCOL_INFOA structure }
SO_PROTOCOL_INFOW = $2005; { WSAPROTOCOL_INFOW structure }
SO_PROTOCOL_INFO = SO_PROTOCOL_INFOA;
PVD_CONFIG = $3001; {configuration info for service provider }
{ Option for opening sockets for synchronous access. }
SO_OPENTYPE = $7008;
SO_SYNCHRONOUS_ALERT = $10;
SO_SYNCHRONOUS_NONALERT = $20;
{ Other NT-specific options. }
SO_MAXDG = $7009;
SO_MAXPATHDG = $700A;
SO_UPDATE_ACCEPT_CONTEXT = $700B;
SO_CONNECT_TIME = $700C;
SOMAXCONN = $7fffffff;
IPV6_UNICAST_HOPS = 8; // ???
IPV6_MULTICAST_IF = 9; // set/get IP multicast i/f
IPV6_MULTICAST_HOPS = 10; // set/get IP multicast ttl
IPV6_MULTICAST_LOOP = 11; // set/get IP multicast loopback
IPV6_JOIN_GROUP = 12; // add an IP group membership
IPV6_LEAVE_GROUP = 13; // drop an IP group membership
MSG_NOSIGNAL = 0;
// getnameinfo constants
NI_MAXHOST = 1025;
NI_MAXSERV = 32;
NI_NOFQDN = $1;
NI_NUMERICHOST = $2;
NI_NAMEREQD = $4;
NI_NUMERICSERV = $8;
NI_DGRAM = $10;
const
SOCK_STREAM = 1; { stream socket }
SOCK_DGRAM = 2; { datagram socket }
SOCK_RAW = 3; { raw-protocol interface }
SOCK_RDM = 4; { reliably-delivered message }
SOCK_SEQPACKET = 5; { sequenced packet stream }
{ TCP options. }
TCP_NODELAY = $0001;
{ Address families. }
AF_UNSPEC = 0; { unspecified }
AF_INET = 2; { internetwork: UDP, TCP, etc. }
AF_INET6 = 23; { Internetwork Version 6 }
AF_MAX = 24;
{ Protocol families, same as address families for now. }
PF_UNSPEC = AF_UNSPEC;
PF_INET = AF_INET;
PF_INET6 = AF_INET6;
PF_MAX = AF_MAX;
type
{ Structure used by kernel to store most addresses. }
PSockAddr = ^TSockAddr;
TSockAddr = TSockAddrIn;
{ Structure used by kernel to pass protocol information in raw sockets. }
PSockProto = ^TSockProto;
TSockProto = packed record
sp_family: u_short;
sp_protocol: u_short;
end;
type
PAddrInfo = ^TAddrInfo;
TAddrInfo = record
ai_flags: integer; // AI_PASSIVE, AI_CANONNAME, AI_NUMERICHOST.
ai_family: integer; // PF_xxx.
ai_socktype: integer; // SOCK_xxx.
ai_protocol: integer; // 0 or IPPROTO_xxx for IPv4 and IPv6.
ai_addrlen: u_int; // Length of ai_addr.
ai_canonname: PAnsiChar; // Canonical name for nodename.
ai_addr: PSockAddr; // Binary address.
ai_next: PAddrInfo; // Next structure in linked list.
end;
const
// Flags used in "hints" argument to getaddrinfo().
AI_PASSIVE = $1; // Socket address will be used in bind() call.
AI_CANONNAME = $2; // Return canonical name in first ai_canonname.
AI_NUMERICHOST = $4; // Nodename must be a numeric address AnsiString.
type
{ Structure used for manipulating linger option. }
PLinger = ^TLinger;
TLinger = packed record
l_onoff: u_short;
l_linger: u_short;
end;
const
MSG_OOB = $01; // Process out-of-band data.
MSG_PEEK = $02; // Peek at incoming messages.
const
{ All Windows Sockets error constants are biased by WSABASEERR from the "normal" }
WSABASEERR = 10000;
{ Windows Sockets definitions of regular Microsoft C error constants }
WSAEINTR = (WSABASEERR+4);
WSAEBADF = (WSABASEERR+9);
WSAEACCES = (WSABASEERR+13);
WSAEFAULT = (WSABASEERR+14);
WSAEINVAL = (WSABASEERR+22);
WSAEMFILE = (WSABASEERR+24);
{ Windows Sockets definitions of regular Berkeley error constants }
WSAEWOULDBLOCK = (WSABASEERR+35);
WSAEINPROGRESS = (WSABASEERR+36);
WSAEALREADY = (WSABASEERR+37);
WSAENOTSOCK = (WSABASEERR+38);
WSAEDESTADDRREQ = (WSABASEERR+39);
WSAEMSGSIZE = (WSABASEERR+40);
WSAEPROTOTYPE = (WSABASEERR+41);
WSAENOPROTOOPT = (WSABASEERR+42);
WSAEPROTONOSUPPORT = (WSABASEERR+43);
WSAESOCKTNOSUPPORT = (WSABASEERR+44);
WSAEOPNOTSUPP = (WSABASEERR+45);
WSAEPFNOSUPPORT = (WSABASEERR+46);
WSAEAFNOSUPPORT = (WSABASEERR+47);
WSAEADDRINUSE = (WSABASEERR+48);
WSAEADDRNOTAVAIL = (WSABASEERR+49);
WSAENETDOWN = (WSABASEERR+50);
WSAENETUNREACH = (WSABASEERR+51);
WSAENETRESET = (WSABASEERR+52);
WSAECONNABORTED = (WSABASEERR+53);
WSAECONNRESET = (WSABASEERR+54);
WSAENOBUFS = (WSABASEERR+55);
WSAEISCONN = (WSABASEERR+56);
WSAENOTCONN = (WSABASEERR+57);
WSAESHUTDOWN = (WSABASEERR+58);
WSAETOOMANYREFS = (WSABASEERR+59);
WSAETIMEDOUT = (WSABASEERR+60);
WSAECONNREFUSED = (WSABASEERR+61);
WSAELOOP = (WSABASEERR+62);
WSAENAMETOOLONG = (WSABASEERR+63);
WSAEHOSTDOWN = (WSABASEERR+64);
WSAEHOSTUNREACH = (WSABASEERR+65);
WSAENOTEMPTY = (WSABASEERR+66);
WSAEPROCLIM = (WSABASEERR+67);
WSAEUSERS = (WSABASEERR+68);
WSAEDQUOT = (WSABASEERR+69);
WSAESTALE = (WSABASEERR+70);
WSAEREMOTE = (WSABASEERR+71);
{ Extended Windows Sockets error constant definitions }
WSASYSNOTREADY = (WSABASEERR+91);
WSAVERNOTSUPPORTED = (WSABASEERR+92);
WSANOTINITIALISED = (WSABASEERR+93);
WSAEDISCON = (WSABASEERR+101);
WSAENOMORE = (WSABASEERR+102);
WSAECANCELLED = (WSABASEERR+103);
WSAEEINVALIDPROCTABLE = (WSABASEERR+104);
WSAEINVALIDPROVIDER = (WSABASEERR+105);
WSAEPROVIDERFAILEDINIT = (WSABASEERR+106);
WSASYSCALLFAILURE = (WSABASEERR+107);
WSASERVICE_NOT_FOUND = (WSABASEERR+108);
WSATYPE_NOT_FOUND = (WSABASEERR+109);
WSA_E_NO_MORE = (WSABASEERR+110);
WSA_E_CANCELLED = (WSABASEERR+111);
WSAEREFUSED = (WSABASEERR+112);
{ Error return codes from gethostbyname() and gethostbyaddr()
(when using the resolver). Note that these errors are
retrieved via WSAGetLastError() and must therefore follow
the rules for avoiding clashes with error numbers from
specific implementations or language run-time systems.
For this reason the codes are based at WSABASEERR+1001.
Note also that [WSA]NO_ADDRESS is defined only for
compatibility purposes. }
{ Authoritative Answer: Host not found }
WSAHOST_NOT_FOUND = (WSABASEERR+1001);
HOST_NOT_FOUND = WSAHOST_NOT_FOUND;
{ Non-Authoritative: Host not found, or SERVERFAIL }
WSATRY_AGAIN = (WSABASEERR+1002);
TRY_AGAIN = WSATRY_AGAIN;
{ Non recoverable errors, FORMERR, REFUSED, NOTIMP }
WSANO_RECOVERY = (WSABASEERR+1003);
NO_RECOVERY = WSANO_RECOVERY;
{ Valid name, no data record of requested type }
WSANO_DATA = (WSABASEERR+1004);
NO_DATA = WSANO_DATA;
{ no address, look for MX record }
WSANO_ADDRESS = WSANO_DATA;
NO_ADDRESS = WSANO_ADDRESS;
EWOULDBLOCK = WSAEWOULDBLOCK;
EINPROGRESS = WSAEINPROGRESS;
EALREADY = WSAEALREADY;
ENOTSOCK = WSAENOTSOCK;
EDESTADDRREQ = WSAEDESTADDRREQ;
EMSGSIZE = WSAEMSGSIZE;
EPROTOTYPE = WSAEPROTOTYPE;
ENOPROTOOPT = WSAENOPROTOOPT;
EPROTONOSUPPORT = WSAEPROTONOSUPPORT;
ESOCKTNOSUPPORT = WSAESOCKTNOSUPPORT;
EOPNOTSUPP = WSAEOPNOTSUPP;
EPFNOSUPPORT = WSAEPFNOSUPPORT;
EAFNOSUPPORT = WSAEAFNOSUPPORT;
EADDRINUSE = WSAEADDRINUSE;
EADDRNOTAVAIL = WSAEADDRNOTAVAIL;
ENETDOWN = WSAENETDOWN;
ENETUNREACH = WSAENETUNREACH;
ENETRESET = WSAENETRESET;
ECONNABORTED = WSAECONNABORTED;
ECONNRESET = WSAECONNRESET;
ENOBUFS = WSAENOBUFS;
EISCONN = WSAEISCONN;
ENOTCONN = WSAENOTCONN;
ESHUTDOWN = WSAESHUTDOWN;
ETOOMANYREFS = WSAETOOMANYREFS;
ETIMEDOUT = WSAETIMEDOUT;
ECONNREFUSED = WSAECONNREFUSED;
ELOOP = WSAELOOP;
ENAMETOOLONG = WSAENAMETOOLONG;
EHOSTDOWN = WSAEHOSTDOWN;
EHOSTUNREACH = WSAEHOSTUNREACH;
ENOTEMPTY = WSAENOTEMPTY;
EPROCLIM = WSAEPROCLIM;
EUSERS = WSAEUSERS;
EDQUOT = WSAEDQUOT;
ESTALE = WSAESTALE;
EREMOTE = WSAEREMOTE;
EAI_ADDRFAMILY = 1; // Address family for nodename not supported.
EAI_AGAIN = 2; // Temporary failure in name resolution.
EAI_BADFLAGS = 3; // Invalid value for ai_flags.
EAI_FAIL = 4; // Non-recoverable failure in name resolution.
EAI_FAMILY = 5; // Address family ai_family not supported.
EAI_MEMORY = 6; // Memory allocation failure.
EAI_NODATA = 7; // No address associated with nodename.
EAI_NONAME = 8; // Nodename nor servname provided, or not known.
EAI_SERVICE = 9; // Servname not supported for ai_socktype.
EAI_SOCKTYPE = 10; // Socket type ai_socktype not supported.
EAI_SYSTEM = 11; // System error returned in errno.
const
WSADESCRIPTION_LEN = 256;
WSASYS_STATUS_LEN = 128;
SHUT_RD = 0;
SHUT_WR = 1;
SHUT_RDWR = 2;
type
PWSAData = ^TWSAData;
TWSAData = packed record
wVersion: Word;
wHighVersion: Word;
szDescription: array[0..WSADESCRIPTION_LEN] of AnsiChar;
szSystemStatus: array[0..WSASYS_STATUS_LEN] of AnsiChar;
iMaxSockets: Word;
iMaxUdpDg: Word;
lpVendorInfo: PAnsiChar;
end;
function IN6_IS_ADDR_UNSPECIFIED(const a: PInAddr6): boolean;
function IN6_IS_ADDR_LOOPBACK(const a: PInAddr6): boolean;
function IN6_IS_ADDR_LINKLOCAL(const a: PInAddr6): boolean;
function IN6_IS_ADDR_SITELOCAL(const a: PInAddr6): boolean;
function IN6_IS_ADDR_MULTICAST(const a: PInAddr6): boolean;
function IN6_ADDR_EQUAL(const a: PInAddr6; const b: PInAddr6):boolean;
procedure SET_IN6_IF_ADDR_ANY (const a: PInAddr6);
procedure SET_LOOPBACK_ADDR6 (const a: PInAddr6);
var
in6addr_any, in6addr_loopback : TInAddr6;
function FD_ISSET(Socket: TSocket; const FDSet: TFDSet): boolean;
procedure FD_CLR(Socket: TSocket; var FDSet: TFDSet);
procedure FD_SET(Socket: TSocket; var FDSet: TFDSet);
procedure FD_ZERO(var FDSet: TFDSet);
// poll() emulation via WSAPoll() extension API available since Vista
const
// poll/WSAPoll flag when normal data may be read
POLLRDNORM = $0100;
// poll/WSAPoll flag when priority data may be read
POLLRDBAND = $0200;
// poll/WSAPoll flag when there is data to read
POLLIN = POLLRDNORM or POLLRDBAND;
// poll/WSAPoll flag when there is urgent data to read
POLLPRI = $0400;
// poll/WSAPoll flag when writing now will not block
POLLOUT = $0010;
// poll/WSAPoll flag error condition (always implicitly polled for)
POLLERR = $0001;
// poll/WSAPoll flag hung up (always implicitly polled for)
POLLHUP = $0002;
// poll/WSAPoll flag invalid polling request (always implicitly polled for)
POLLNVAL = $0004;
// poll/WSAPoll flag when writing now will not block
POLLWRNORM = $0010;
// poll/WSAPoll flag when priority data may be written
POLLWRBAND = $0020;
type
/// polling request data structure for poll/WSAPoll
TPollFD = record
/// file descriptor to poll
fd: TSocket;
/// types of events poller cares about
// - mainly POLLIN and/or POLLOUT
events: SHORT;
/// types of events that actually occurred
// - caller could just reset revents := 0 to reuse the structure
revents: SHORT;
end;
PPollFD = ^TPollFD;
TPollFDDynArray = array of TPollFD;
/// Poll the file descriptors described by the NFDS structures starting at fds
// - under Windows, will call WSAPoll() emulation API - see
// https://blogs.msdn.microsoft.com/wndp/2006/10/26
// - if TIMEOUT is nonzero and not -1, allow TIMEOUT milliseconds for
// an event to occur; if TIMEOUT is -1, block until an event occurs
// - returns the number of file descriptors with events, zero if timed out,
// or -1 for errors
// - before Vista, will return -1 since the API extension was not yet defined
// - in practice, this API is actually slightly SLOWER than optimized Select() :(
function poll(fds: PPollFD; nfds, timeout: integer): integer;
type
TWSAStartup = function(wVersionRequired: Word; var WSData: TWSAData): integer; stdcall;
TWSACleanup = function: integer; stdcall;
TWSAGetLastError = function: integer; stdcall;
TGetServByName = function(name, proto: PAnsiChar): PServEnt; stdcall;
TGetServByPort = function(port: integer; proto: PAnsiChar): PServEnt; stdcall;
TGetProtoByName = function(name: PAnsiChar): PProtoEnt; stdcall;
TGetProtoByNumber = function(proto: integer): PProtoEnt; stdcall;
TGetHostByName = function(name: PAnsiChar): PHostEnt; stdcall;
TGetHostByAddr = function(addr: Pointer; len, Struc: integer): PHostEnt; stdcall;
TGetHostName = function(name: PAnsiChar; len: integer): integer; stdcall;
TShutdown = function(s: TSocket; how: integer): integer; stdcall;
TSetSockOpt = function(s: TSocket; level, optname: integer; optval: PAnsiChar;
optlen: integer): integer; stdcall;
TGetSockOpt = function(s: TSocket; level, optname: integer; optval: PAnsiChar;
var optlen: integer): integer; stdcall;
TSendTo = function(s: TSocket; Buf: pointer; len, flags: integer; addrto: PSockAddr;
tolen: integer): integer; stdcall;
TSend = function(s: TSocket; Buf: pointer; len, flags: integer): integer; stdcall;
TRecv = function(s: TSocket; Buf: pointer; len, flags: integer): integer; stdcall;
TRecvFrom = function(s: TSocket; Buf: pointer; len, flags: integer; from: PSockAddr;
fromlen: PInteger): integer; stdcall;
Tntohs = function(netshort: u_short): u_short; stdcall;
Tntohl = function(netlong: u_long): u_long; stdcall;
TListen = function(s: TSocket; backlog: integer): integer; stdcall;
TIoctlSocket = function(s: TSocket; cmd: DWORD; var arg: integer): integer; stdcall;
TInet_ntoa = function(inaddr: TInAddr): PAnsiChar; stdcall;
TInet_addr = function(cp: PAnsiChar): u_long; stdcall;
Thtons = function(hostshort: u_short): u_short; stdcall;
Thtonl = function(hostlong: u_long): u_long; stdcall;
TGetSockName = function(s: TSocket; name: PSockAddr; var namelen: integer): integer; stdcall;
TGetPeerName = function(s: TSocket; name: PSockAddr; var namelen: integer): integer; stdcall;
TConnect = function(s: TSocket; name: PSockAddr; namelen: integer): integer; stdcall;
TCloseSocket = function(s: TSocket): integer; stdcall;
TBind = function(s: TSocket; addr: PSockAddr; namelen: integer): integer; stdcall;
TAccept = function(s: TSocket; addr: PSockAddr; var addrlen: integer): TSocket; stdcall;
TTSocket = function(af, Struc, Protocol: integer): TSocket; stdcall;
TSelect = function(nfds: integer; readfds, writefds, exceptfds: PFDSet;
timeout: PTimeVal): Longint; stdcall;
TGetAddrInfo = function(NodeName: PAnsiChar; ServName: PAnsiChar; Hints: PAddrInfo;
var Addrinfo: PAddrInfo): integer; stdcall;
TFreeAddrInfo = procedure(ai: PAddrInfo); stdcall;
TGetNameInfo = function( addr: PSockAddr; namelen: integer; host: PAnsiChar;
hostlen: DWORD; serv: PAnsiChar; servlen: DWORD; flags: integer): integer; stdcall;
T__WSAFDIsSet = function (s: TSocket; var FDSet: TFDSet): Bool; stdcall;
TWSAIoctl = function (s: TSocket; dwIoControlCode: DWORD; lpvInBuffer: Pointer;
cbInBuffer: DWORD; lpvOutBuffer: Pointer; cbOutBuffer: DWORD;
lpcbBytesReturned: PDWORD; lpOverlapped: Pointer;
lpCompletionRoutine: pointer): u_int; stdcall;
TWSAPoll = function(fds: PPollFD; nfds, timeout: integer): integer; stdcall;
var
WSAStartup: TWSAStartup;
WSACleanup: TWSACleanup;
WSAGetLastError: TWSAGetLastError;
GetServByName: TGetServByName;
GetServByPort: TGetServByPort;
GetProtoByName: TGetProtoByName;
GetProtoByNumber: TGetProtoByNumber;
GetHostByName: TGetHostByName;
GetHostByAddr: TGetHostByAddr;
ssGetHostName: TGetHostName;
Shutdown: TShutdown;
SetSockOpt: TSetSockOpt;
GetSockOpt: TGetSockOpt;
SendTo: TSendTo;
Send: TSend;
Recv: TRecv;
RecvFrom: TRecvFrom;
ntohs: Tntohs;
ntohl: Tntohl;
Listen: TListen;
IoctlSocket: TIoctlSocket;
Inet_ntoa: TInet_ntoa;
Inet_addr: TInet_addr;
htons: Thtons;
htonl: Thtonl;
ssGetSockName: TGetSockName;
ssGetPeerName: TGetPeerName;
ssConnect: TConnect;
CloseSocket: TCloseSocket;
ssBind: TBind;
ssAccept: TAccept;
Socket: TTSocket;
Select: TSelect;
GetAddrInfo: TGetAddrInfo;
FreeAddrInfo: TFreeAddrInfo;
GetNameInfo: TGetNameInfo;
__WSAFDIsSet: T__WSAFDIsSet;
WSAIoctl: TWSAIoctl;
WSAPoll: TWSAPoll;
var
SynSockCS: TRTLCriticalSection;
SockEnhancedApi: Boolean;
SockWship6Api: Boolean;
SockSChannelApi: Boolean;
type
PVarSin = ^TVarSin;
TVarSin = packed record
case integer of
0: (AddressFamily: u_short);
1: (
case sin_family: u_short of
AF_INET: (sin_port: u_short;
sin_addr: TInAddr;
sin_zero: array[0..7] of AnsiChar);
AF_INET6: (sin6_port: u_short;
sin6_flowinfo: u_long;
sin6_addr: TInAddr6;
sin6_scope_id: u_long);
);
end;
function SizeOfVarSin(const sin: TVarSin): integer;
{$ifdef UNICODE}inline;{$endif}
function GetSockName(s: TSocket; var name: TVarSin): integer;
function GetPeerName(s: TSocket; var name: TVarSin): integer;
function GetHostName: AnsiString;
function Bind(s: TSocket; const addr: TVarSin): integer;
function Connect(s: TSocket; const name: TVarSin): integer;
function Accept(s: TSocket; var addr: TVarSin): TSocket;
function IsNewApi(Family: integer): Boolean;
{$ifdef UNICODE}inline;{$endif}
function SetVarSin(var Sin: TVarSin; const IP, Port: AnsiString; Family, SockProtocol, SockType: integer; PreferIP4: Boolean): integer;
function GetSinIP(const Sin: TVarSin): AnsiString;
procedure GetSinIPShort(const Sin: TVarSin; var result: shortstring);
function GetSinPort(const Sin: TVarSin): integer;
procedure ResolveNameToIP(const Name: AnsiString; Family, SockProtocol, SockType: integer;
IPList: TStrings; IPListClear: boolean = true);
function ResolveIPToName(const IP: AnsiString; Family, SockProtocol, SockType: integer): AnsiString;
function ResolvePort(const Port: AnsiString; Family, SockProtocol, SockType: integer): Word;
{ SChannel low-level API }
type
TCredHandle = record
dwLower: pointer;
dwUpper: pointer;
end;
PCredHandle = ^TCredHandle;
TCtxtHandle = type TCredHandle;
PCtxtHandle = ^TCtxtHandle;
{$ifdef DELPHI5OROLDER}
PCardinal = ^Cardinal;
{$endif}
TSChannelCred = record
dwVersion: cardinal;
cCreds: cardinal;
paCred: pointer;
hRootStore: THandle;
cMappers: cardinal;
aphMappers: pointer;
cSupportedAlgs: cardinal;
palgSupportedAlgs: PCardinal;
grbitEnabledProtocols: cardinal;
dwMinimumCipherStrength: cardinal;
dwMaximumCipherStrength: cardinal;
dwSessionLifespan: cardinal;
dwFlags: cardinal;
dwCredFormat: cardinal;
end;
PSChannelCred = ^TSChannelCred;
TSecBuffer = record
cbBuffer: cardinal;
BufferType: cardinal;
pvBuffer: pointer;
end;
PSecBuffer = ^TSecBuffer;
TSecBufferDesc = record
ulVersion: cardinal;
cBuffers: cardinal;
pBuffers: PSecBuffer;
end;
PSecBufferDesc = ^TSecBufferDesc;
TTimeStamp = record
dwLowDateTime: cardinal;
dwHighDateTime: cardinal;
end;
PTimeStamp = ^TTimeStamp;
TSecPkgContextStreamSizes = record
cbHeader: cardinal;
cbTrailer: cardinal;
cbMaximumMessage: cardinal;
cBuffers: cardinal;
cbBlockSize: cardinal;
end;
PSecPkgContextStreamSizes = ^TSecPkgContextStreamSizes;
ESChannel = class(Exception);
{$ifdef UNICODE}TSChannelClient = record{$else}TSChannelClient = object{$endif}
private
Cred: TCredHandle;
Ctxt: TCtxtHandle;
Sizes: TSecPkgContextStreamSizes;
Data, Input: AnsiString;
InputSize, DataPos, DataCount, InputCount: integer;
procedure HandshakeLoop(aSocket: THandle);
procedure AppendData(const aBuffer: TSecBuffer);
public
Initialized: boolean;
procedure AfterConnection(aSocket: THandle; aAddress: PAnsiChar);
procedure BeforeDisconnection(aSocket: THandle);
function Receive(aSocket: THandle; aBuffer: pointer; aLength: integer): integer;
function Send(aSocket: THandle; aBuffer: pointer; aLength: integer): integer;
end;
var
AcquireCredentialsHandle: function(pszPrincipal: PAnsiChar;
pszPackage: PAnsiChar; fCredentialUse: cardinal; pvLogonID: PInt64;
pAuthData: PSChannelCred; pGetKeyFn: pointer; pvGetKeyArgument: pointer;
phCredential: PCredHandle; ptsExpiry: PTimeStamp): cardinal; stdcall;
FreeCredentialsHandle: function(phCredential: PCredHandle): cardinal; stdcall;
InitializeSecurityContext: function(phCredential: PCredHandle;
phContext: PCtxtHandle; pszTargetName: PAnsiChar; fContextReq: cardinal;
Reserved1: cardinal; TargetDataRep: cardinal; pInput: PSecBufferDesc;
Reserved2: cardinal; phNewContext: PCtxtHandle; pOutput: PSecBufferDesc;
pfContextAttr: PCardinal; ptsExpiry: PTimeStamp): cardinal; stdcall;
DeleteSecurityContext: function(phContext: PCtxtHandle): cardinal; stdcall;
ApplyControlToken: function(phContext: PCtxtHandle;
pInput: PSecBufferDesc): cardinal; stdcall;
QueryContextAttributes: function(phContext: PCtxtHandle;
ulAttribute: cardinal; pBuffer: pointer): cardinal; stdcall;
FreeContextBuffer: function(pvContextBuffer: pointer): cardinal; stdcall;
EncryptMessage: function(phContext: PCtxtHandle; fQOP: cardinal;
pMessage: PSecBufferDesc; MessageSeqNo: cardinal): cardinal; stdcall;
DecryptMessage: function(phContext: PCtxtHandle; pMessage: PSecBufferDesc;
MessageSeqNo: cardinal; pfQOP: PCardinal): cardinal; stdcall;
const
SP_PROT_TLS1 = $0C0;
SP_PROT_TLS1_SERVER = $040;
SP_PROT_TLS1_CLIENT = $080;
SP_PROT_TLS1_1 = $300;
SP_PROT_TLS1_1_SERVER = $100;
SP_PROT_TLS1_1_CLIENT = $200;
SP_PROT_TLS1_2 = $C00;
SP_PROT_TLS1_2_SERVER = $400;
SP_PROT_TLS1_2_CLIENT = $800;
SECPKG_CRED_INBOUND = 1;
SECPKG_CRED_OUTBOUND = 2;
ISC_REQ_DELEGATE = $00000001;
ISC_REQ_MUTUAL_AUTH = $00000002;
ISC_REQ_REPLAY_DETECT = $00000004;
ISC_REQ_SEQUENCE_DETECT = $00000008;
ISC_REQ_CONFIDENTIALITY = $00000010;
ISC_REQ_USE_SESSION_KEY = $00000020;
ISC_REQ_PROMPT_FOR_CREDS = $00000040;
ISC_REQ_USE_SUPPLIED_CREDS = $00000080;
ISC_REQ_ALLOCATE_MEMORY = $00000100;
ISC_REQ_USE_DCE_STYLE = $00000200;
ISC_REQ_DATAGRAM = $00000400;
ISC_REQ_CONNECTION = $00000800;
ISC_REQ_CALL_LEVEL = $00001000;
ISC_REQ_FRAGMENT_SUPPLIED = $00002000;
ISC_REQ_EXTENDED_ERROR = $00004000;
ISC_REQ_STREAM = $00008000;
ISC_REQ_INTEGRITY = $00010000;
ISC_REQ_IDENTIFY = $00020000;
ISC_REQ_NULL_SESSION = $00040000;
ISC_REQ_MANUAL_CRED_VALIDATION = $00080000;
ISC_REQ_RESERVED1 = $00100000;
ISC_REQ_FRAGMENT_TO_FIT = $00200000;
ISC_REQ_FLAGS =
ISC_REQ_SEQUENCE_DETECT or ISC_REQ_REPLAY_DETECT or
ISC_REQ_CONFIDENTIALITY or ISC_REQ_EXTENDED_ERROR or
ISC_REQ_ALLOCATE_MEMORY or ISC_REQ_STREAM;
SECBUFFER_VERSION = 0;
SECBUFFER_EMPTY = 0;
SECBUFFER_DATA = 1;
SECBUFFER_TOKEN = 2;
SECBUFFER_EXTRA = 5;
SECBUFFER_STREAM_TRAILER = 6;
SECBUFFER_STREAM_HEADER = 7;
SEC_E_OK = 0;
SEC_I_CONTINUE_NEEDED = $00090312;
SEC_I_RENEGOTIATE = $00090321;
SEC_E_INCOMPLETE_MESSAGE = $80090318;
SEC_E_INVALID_TOKEN = $80090308;
UNISP_NAME = 'Microsoft Unified Security Protocol Provider';
SECPKG_ATTR_STREAM_SIZES = 4;
SECURITY_NATIVE_DREP = $10;
SCHANNEL_SHUTDOWN = 1;
implementation
var
SynSockCount: integer;
LibHandle: THandle;
Libwship6Handle: THandle;
LibSecurHandle: THandle;
function IN6_IS_ADDR_UNSPECIFIED(const a: PInAddr6): boolean;
begin
result := ((a^.u6_addr32[0] = 0) and (a^.u6_addr32[1] = 0) and
(a^.u6_addr32[2] = 0) and (a^.u6_addr32[3] = 0));
end;
function IN6_IS_ADDR_LOOPBACK(const a: PInAddr6): boolean;
begin
result := ((a^.u6_addr32[0] = 0) and (a^.u6_addr32[1] = 0) and
(a^.u6_addr32[2] = 0) and
(a^.u6_addr8[12] = 0) and (a^.u6_addr8[13] = 0) and
(a^.u6_addr8[14] = 0) and (a^.u6_addr8[15] = 1));
end;
function IN6_IS_ADDR_LINKLOCAL(const a: PInAddr6): boolean;
begin
result := ((a^.u6_addr8[0] = $FE) and (a^.u6_addr8[1] = $80));
end;
function IN6_IS_ADDR_SITELOCAL(const a: PInAddr6): boolean;
begin
result := ((a^.u6_addr8[0] = $FE) and (a^.u6_addr8[1] = $C0));
end;
function IN6_IS_ADDR_MULTICAST(const a: PInAddr6): boolean;
begin
result := (a^.u6_addr8[0] = $FF);
end;
function IN6_ADDR_EQUAL(const a: PInAddr6; const b: PInAddr6): boolean;
begin
result := (CompareMem(a, b, sizeof(TInAddr6)));
end;
procedure SET_IN6_IF_ADDR_ANY(const a: PInAddr6);
begin
FillChar(a^, sizeof(TInAddr6), 0);
end;
procedure SET_LOOPBACK_ADDR6(const a: PInAddr6);
begin
FillChar(a^, sizeof(TInAddr6), 0);
a^.u6_addr8[15] := 1;
end;