01-30-2012، 12:15 PM
کد:
{$F+}
{ nb.pas
16/32 bit windows netbios access (follows IBM's Netbios 3.0 spec)
(C) CEVI VZW - 29 april 1998 -- DH (Danny.Heijl@cevi.be) --
You can (ab)use this code as you like, but please do not remove the credits.
I used reference material from IBM, Microsoft, Syntax and Byte when I wrote
the 16-bit (DOS) c-version ages ago (in Borland Turbo C 2.0 on a 386SX PC)
with a Syntax SMB server running on Interactive Unix.
I now converted this to 16 and 32 bit Delphi code.
}
interface
uses SysUtils, Winprocs, Wintypes;
const
{ size of a netbios name }
NBNAMESIZE = 16;
{ max number of network adapters }
{ remeber it's BIG Blue, right ? }
MAXLANAS = 254;
{ NCB Command codes }
NCB_ASYNC = $80; { asynch command bit to be or-ed into command }
NCB_CALL = $10; { open a session }
NCB_LISTEN = $11; { wait for a call }
NCB_HANGUP = $12; { end session }
NCB_SEND = $14; { send data }
NCB_RECV = $15; { receive data }
NCB_RECVANY = $16; { receive data on any session }
NCB_CHAINSEND = $17; { chain send data }
NCB_DGSEND = $20; { send a datagram }
NCB_DGRECV = $21; { receive datagram }
NCB_DGSENDBC = $22; { send broadcast datagram }
NCB_DGREVCBC = $23; { receive broadcast datagram }
NCB_ADDNAME = $30; { add unique name to local table }
NCB_DELNAME = $31; { delete name from local table }
NCB_RESET = $32; { reset adapter }
NCB_ADPSTAT = $33; { adapter status }
NCB_SSTAT = $34; { session status }
NCB_CANCEL = $35; { cancel NCB request }
NCB_ADDGRPNAME= $36; { add group name to local table }
NCB_ENUM = $37; { enum adapters }
NCB_UNLINK = $70; { unlink remote boot code }
NCB_SENDNA = $71; { send, don't wait for ACK }
NCB_CHAINSENDNA=$72; { chain send, but don't wait for ACK }
NCB_LANSTALERT= $73; { lan status alert }
NCB_ACTION = $77; { enable extensions }
NCB_FINDNAME = $78; { search for name on the network }
NCB_TRACE = $79; { activate / stop tracing }
{ NCB return codes }
NRC_GOODRET = $00; { good return
also returned when ASYNCH request accepted }
NRC_BUFLEN = $01; { illegal buffer length }
NRC_ILLCMD = $03; { illegal command }
NRC_CMDTMO = $05; { command timed out }
NRC_INCOMP = $06; { message incomplete, issue another command }
NRC_BADDR = $07; { illegal buffer address }
NRC_SNUMOUT = $08; { session number out of range }
NRC_NORES = $09; { no resource available }
NRC_SCLOSED = $0a; { session closed }
NRC_CMDCAN = $0b; { command cancelled }
NRC_DUPNAME = $0d; { duplicate name }
NRC_NAMTFUL = $0e; { name table full }
NRC_ACTSES = $0f; { no deletions, name has active sessions }
NRC_LOCTFUL = $11; { local session table full }
NRC_REMTFUL = $12; { remote session table full }
NRC_ILLNN = $13; { illegal name number }
NRC_NOCALL = $14; { no callname }
NRC_NOWILD = $15; { cannot put * in NCB_NAME }
NRC_INUSE = $16; { name in use on remote adapter }
NRC_NAMERR = $17; { name deleted }
NRC_SABORT = $18; { session ended abnormally }
NRC_NAMCONF = $19; { name conflict detected }
NRC_IFBUSY = $21; { interface busy, IRET before retrying }
NRC_TOOMANY = $22; { too many commands outstanding, retry later }
NRC_BRIDGE = $23; { ncb_lana_num field invalid }
NRC_CANOCCR = $24; { command completed while cancel occurring }
NRC_CANCEL = $26; { command not valid to cancel }
NRC_DUPENV = $30; { name defined by anther local process }
NRC_ENVNOTDEF = $34; { environment undefined. RESET required }
NRC_OSRESNOTAV = $35; { required OS resources exhausted }
NRC_MAXAPPS = $36; { max number of applications exceeded }
NRC_NOSAPS = $37; { no saps available for netbios }
NRC_NORESOURCES = $38; { requested resources are not available }
NRC_INVADDRESS = $39; { invalid ncb address or length > segment }
NRC_INVDDID = $3B; { invalid NCB DDID }
NRC_LOCKFAIL = $3C; { lock of user area failed }
NRC_OPENERR = $3f; { NETBIOS not loaded }
NRC_SYSTEM = $40; { system error }
NRC_PENDING = $ff; { asynchronous command is not yet finished }
{ Values for transport_id }
ALL_TRANSPORTS = 'M'#$00#$00#$00;
MS_NBF = 'MNBF';
{ values for name_flags bits. }
NAME_FLAGS_MASK = $87;
GROUP_NAME = $80;
UNIQUE_NAME = $00;
REGISTERING = $00;
REGISTERED = $04;
DEREGISTERED = $05;
DUPLICATE = $06;
DUPLICATE_DEREG = $07;
{ Values for state }
LISTEN_OUTSTANDING = $01;
CALL_PENDING = $02;
SESSION_ESTABLISHED = $03;
HANGUP_PENDING = $04;
HANGUP_COMPLETE = $05;
SESSION_ABORTED = $06;
type
{ Netbios Name }
TNBName = array[0..(NBNAMESIZE - 1)] of byte;
{ MAC address }
TMacAddress = array[0..5] of byte;
PNCB = ^TNCB;
{ Netbios Control Block }
{$IFDEF WIN32}
TNCBPostProc = procedure(P: PNCB);
{$ENDIF}
TNCB = packed record { Netbios Control Block }
Command: byte; { command code }
RetCode: byte; { return code }
LSN: byte; { local session number }
Num: byte; { name number }
Buf: ^byte; { data buffer }
Length: word; { data length }
CallName: TNBName; { name to call }
Name: TNBName; { our own name }
RTO: byte; { receive time-out }
STO: byte; { send time-out }
{$IFNDEF WIN32}
Post_Offs:word; { asynch notification routine offset }
Post_Seg: word; { asynch notification routine segment}
{$ELSE}
PostPrc: TNCBPostProc;{ asynch notification routine (nb30) }
{$ENDIF}
Lana_Num: byte; { adapter number }
Cmd_Cplt: byte; { command completion flag }
{$IFDEF WIN32}
Reserved: array[0..9] of byte; { Reserverd for Bios use }
Event: THandle; { WIN32 event handle to be signalled }
{ for asynch cmd completion }
{$ELSE}
Reserved: array[0..13] of byte; { Reserved }
{$ENDIF}
end;
{ Netbios Name Info record }
PNameInfo = ^TNameInfo;
TNameInfo = packed record { name info record }
Name: TNBName; { netbios name }
NameNum:byte; { name number }
NameSt: byte; { name status }
end;
{ Netbios adapter status }
PAdpStat = ^TAdpStat;
TAdpStat = packed record { adapter status record}
ID: TMacAddress; { adapter mac address }
VMajor: byte; { software version major number }
Resvd0: byte;
AdpType: byte; { adapter type }
VMinor: byte; { software version minor number }
RptTime: word; { reporting time period }
RcvCRC: word; { receive crc errors }
RcvOth: word; { receive other errors }
TxmCol: word; { transmit collisions }
TxmOth: word; { transmit other errors }
TxmOK: LongInt; { successfull transmissions }
RcvOK: LongInt; { successfull receives }
TxmRetr: word; { transmit retries }
NoRcvBuf: word; { number of 'no receive buffer' }
T1_tmo: word; { t1 time-outs }
Ti_tmo: word; { ti time_outs }
Resvd1: LongInt;
Free_Ncbs:word; { number of free ncb's }
Cfg_Ncbs: word; { number of configured ncb's }
max_Ncbs: word; { max ncb's used }
NoTxmBuf: word; { number of 'no transmit buffer'}
MaxDGSize:word; { max. datagram size }
Pend_Ses: word; { number of pending sessions }
Cfg_Ses: word; { number of configured sessions }
Max_Ses: word; { max sessions used }
Max_SPSz: word; { max. session packet size }
nNames: word; { number of names in local table}
Names: array[0..15] of TnameInfo; { local name table }
end;
{
Structure returned to the NCB command NCBSSTAT is SESSION_HEADER followed
by an array of SESSION_BUFFER structures. If the NCB_NAME starts with an
asterisk then an array of these structures is returned containing the
status for all names.
}
{ session header }
PSession_Header = ^TSession_Header;
TSession_Header = packed record
sess_name: byte;
num_sess: byte;
rcv_dg_outstanding: byte;
rcv_any_outstanding: byte;
end;
{ session buffer }
PSession_Buffer = ^TSession_Buffer;
TSession_Buffer = packed record
lsn: byte;
state: byte;
local_name: TNBName;
remote_name: TNBName;
rcvs_outstanding: byte;
sends_outstanding: byte;
end;
{
Structure returned to the NCB command NCBENUM.
On a system containing lana's 0, 2 and 3, a structure with
length =3, lana[0]=0, lana[1]=2 and lana[2]=3 will be returned.
}
PLana_Enum = ^TLana_Enum;
TLANA_ENUM = packed record
length: byte; { Number of valid entries in lana[] }
lana: array[0..(MAXLANAS - 1)] of byte;
end;
{
Structure returned to the NCB command NCBFINDNAME is FIND_NAME_HEADER followed
by an array of FIND_NAME_BUFFER structures.
}
PFind_Name_Header = ^TFind_Name_Header;
TFind_Name_Header = packed record
node_count: word;
reserved: byte;
unique_group: byte;
end;
PFind_Name_Buffer = ^TFind_Name_Buffer;
TFind_Name_Buffer = packed record
length: byte;
access_control: byte;
frame_control: byte;
destination_addr:TMacAddress;
source_addr: TMacAddress;
routing_info: array[0..17] of byte;
end;
{
Structure provided with NCBACTION. The purpose of NCBACTION is to provide
transport specific extensions to netbios.
}
PAction_Header = ^TAction_Header;
TAction_Header = packed record
transport_id: LongInt;
action_code: Word;
reserved: Word;
end;
{$IFDEF WIN32}
function Netbios(P: PNCB): Char; stdcall;
{$ENDIF}
{ Exposed functions }
function NetbiosCmd(var NCB: TNCB): Word;
implementation
{$IFDEF WIN32}
function Netbios; external 'netapi32.dll' name 'Netbios';
{$ENDIF}
{---------------------------------}
{ execute a Windows Netbios Call }
{---------------------------------}
function NetbiosCmd(var NCB: TNCB): Word;
begin
{$IFNDEF WIN32}
asm
push bp { save bp }
push ss { save ss }
push ds { save ds }
les bx, NCB { get segment/offset address of NCB }
call NetBiosCall; { 16 bit Windows Netbios call }
xor ah,ah
mov @Result, ax { store return code }
pop ds { restore ds }
pop ss { restore ss }
pop bp { restore bp }
end;
{$ELSE}
Result := Word(Netbios(PNCB(@NCB))); { 32 bit Windows Netbios call }
{$ENDIF}
end;
end.
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