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Format of DESQview/X socket record

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Offset Size Description

00h

WORD

signature F0ADh

02h

WORD

function number (see #00557)

04h

WORD

returned error code (see #00578)

06h

WORD

maximum message size??? (usually 0400h)

08h

WORD

PSP segment to use or 0000h if socket not valid

0Ah

WORD

scratch space (JFT size)

0Ch

DWORD

scratch space (JFT address)

10h

DWORD

mailbox handle (initialized by function 0000h)

14h

DWORD

timer object handle (initialized by function 0000h)

---function 0000h---

18h

WORD

(ret) ???

---function 0001h---

18h

WORD

(ret) status???

1Ah

128 BYTEs

(ret) ASCIZ hostname (empty string if not on network)

9Ah

WORD

maximum length of hostname to return

---function 0002h---

18h

WORD

(ret) status

1Ah

WORD

socket's file handle

1Ch

WORD

IOCTL function:
05h "FIONREAD" determine available input
06h "FIONBIO" set blocking state of socket

1Eh

WORD

(return, subfn 05h) number of bytes available for reading
(call, subfn 06h) 0000h blocking, nonzero nonblocking

---function 0003h---

18h

2 BYTEs

unused

1Ah

WORD

delay time in seconds

---function 0004h---

18h

WORD

(ret) result in network (big-endian) byte order

1Ah

WORD

value to convert to network byte order

---function 0005h---

18h

WORD

(ret) number of handles meeting the specified conditions???

1Ah

WORD

number of file handles in each bitset

1Ch

DWORD

bitset of socket handles to check for readability

20h

DWORD

bitset of socket handles to check for writability

24h

DWORD

bitset of socket handles to check for errors

28h

WORD

timeout in ??? or 0000h to block until some socket ready

2Ah

DWORD

???

2Eh

DWORD

???

---function 0006h---

18h

WORD

(ret) status:
0000h - if successful
FFFFh - on error

1Ah

WORD

socket's file handle

---function 0008h---

18h

WORD

(ret) status:
0000h - if successful
FFFFh - on error

1Ah

WORD

socket's file handle

1Ch

WORD

0001h - if socket name specified
0000h - if not

1Eh

WORD

length of socket name

20h

N BYTEs

name of socket to which to connect

---function 0009h---

18h

WORD

(ret) number of bytes actually read, 0000h if connection closed, or FFFFh on error

1Ah

WORD

socket's file handle

1Ch

WORD

number of bytes to read

1Eh

WORD

flags

20h

WORD

0000h - if no source address desired
0001h - if source address is to be stored (datagram sockets)

22h

WORD

length of source address

24h

110 BYTEs

source address

92h

1024 BYTEs

buffer for data to be read

---function 000Ah---

18h

WORD

(ret) socket's file handle or FFFFh on error

1Ah

WORD

address family (0001h,0002h)

1Ch

WORD

socket type

1Eh

WORD

protocol

---function 000Bh---

18h

WORD

(ret)
0001h - if ???
FFFFh - on error

1Ah

WORD

socket's file handle

1Eh

WORD

(call) ???

---function 000Ch---

18h

128 BYTEs

ASCIZ hostname (special case if empty string or "unix")

98h

???

(ret) packed 'hostent' structure

A2h

???

(ret) ???

---function 000Dh---

18h

WORD

(ret) number of bytes actually written or FFFFh on error

1Ah

WORD

socket's file handle

1Ch

WORD

number of bytes to write

1Eh

WORD

number of bytes to follow in subsequent writes???

20h

WORD

flags

22h

WORD

0000h - if no destination specified
0001h - if destination present

24h

WORD

0001h - if broadcast message ???
0000h - if not
(ignored if no destination specified)

26h

WORD

length of destination address

28h

110 BYTEs

destination address

96h

1024 BYTEs

buffer containing data to be written

---function 000Eh---

no additional fields

---function 000Fh---

18h

DWORD

(ret) DESQview task handle of calling process

---function 0010h---

18h

DWORD

(ret) current time

1Ch

DWORD

(ret) ???

---function 0011h---

18h

WORD

(ret) status:
0000h - if successful
FFFFh - on error

1Ah

WORD

socket's file handle

1Ch

WORD

length of name

1Eh

N BYTEs

buffer for socket name

---function 0012h---

18h

WORD

(ret) status:
0000h - if successful
FFFFh - on error

1Ah

WORD

socket's file handle

1Ch

WORD

maximum backlog of pending connections allowed on socket

---function 0013h---

18h

WORD

(ret) file handle for new connection or FFFFh on error

1Ah

WORD

listen()ing socket's file handle

1Ch

WORD

(call) length of buffer for connecting entity's address
(ret) actual length of address

1Eh

N BYTEs

buffer for connecting entity's address (110 bytes???)

---function 0014h---

18h

WORD

(ret) socket's file handle or FFFFh on error

1Ah

4 BYTEs

(ret) ???

1Eh

WORD

(ret) ???

20h

WORD

(ret) ???

22h

256 BYTEs

ASCIZ X display name

122h

???

---function 0015h---

18h

WORD

(call) type of address??? (test for 0001h seen)

1Ah

WORD

(call) length of buffer for host address

1Ch

110 BYTEs

buffer containing ASCIZ host address

8Ah

WORD

(ret) offset of official host name

8Ch

WORD

(ret) offset of alias list???

8Eh

WORD

(ret) address type???

90h

WORD

(ret) length of an address in bytes???

92h

WORD

(ret) offset of address???

9Ah

N BYTEs

(ret) buffer for hostname, alias list, and host address

---function 0016h---

18h

???

buffer for ASCIZ protocol name

98h

???

---function 0017h---

18h

WORD

(call) protocol number

1Ah

WORD

(ret) ??? or 0001h

---function 0018h---

18h

128 BYTEs

buffer containing ASCIZ ???

98h

128 BYTEs

buffer containing ASCIZ ???

118h

WORD

(ret) ???

---function 0019h---

18h

WORD

port number

1Ah

128 BYTEs

(call) ASCIZ host name
(ret) packed servent strctures???

9Ah

WORD

(ret) ???

---function 001Ah---

18h

WORD

(ret)
0000h - if successful
FFFFh - on error

1Ah

WORD

socket's file handle

1Ch

WORD

(call) length of buffer for socket name
(ret) actual length of socket name

1Eh

N BYTEs

buffer for socket name

---function 001Bh---

18h

WORD

(ret) status:
0000h - if successful
FFFFh - on error

1Ah

WORD

socket's file handle

1Ch

WORD

(call) size of buffer for name
(ret) actual size of name

1Eh

N BYTEs

buffer for peer's name

---function 001Ch---

18h

WORD

(ret) status:
0000h - if successful
FFFFh - on error

1Ah

WORD

direction:
0000h - get
0001h - set

1Ch

WORD

socket's file handle

1Eh

WORD

option level

20h

WORD

option name

22h

WORD

(call) length of buffer for option value
(ret) actual length of option value

24h

N BYTEs

buffer for option value

---function 001Dh---

no additional fields

---function 001Eh---

18h

WORD

(ret) status:
0000h - ???
0001h - ???

1Ah

WORD

file handle which may or may not be a socket

---function 001Fh---

18h

WORD

(ret) file handle or FFFFh on error

1Ah

DWORD

(call) pointer to Socket Context Record (see #00579) of a previously detached socket

---function 0020h---

18h

WORD

(ret) status:
0000h - if successful
FFFFh - on error

1Ah

WORD

socket's file handle

1Ch

DWORD

(ret) pointer to Socket Context Record (see #00579) for the file handle

---function 0021h---

18h

64 BYTEs

buffer for DESQview startup directory (see AX=DE25h)

---function 0022h---

18h

DWORD

(ret) task handle of new application

1Ch

WORD

size of .DVP data

1Eh

129 BYTEs

ASCIZ ???

9Fh

N BYTEs

.DVP data (see #00427 at AX=102Ch)

---function 0023h---

18h

WORD

(ret) ??? or FFFFh on error

1Ah

WORD

socket's file handle???

---function 0024h---

18h

WORD

(ret) DOS error code (see #01680 at INT 21/AH=59h/BX=0000h) 0000h if successful

1Ah

129 BYTEs

ASCIZ filename/pathname

11Bh

129 BYTEs

ASCIZ canonicalized filename/pathname (see INT 21/AH=60h)

---function 0025h---

18h

WORD

value of AX

1Ah

WORD

value of BX

1Ch

WORD

(call) value of CX for call if AH value other than 12h
(call) number of stack parameters if AH value is 12h
(ret) returned CX for calls other than INT 15/AH=12h

1Eh

WORD

value of DX

20h

WORD

value of DI

22h

WORD

value of SI

24h

WORD

value of DS

26h

WORD

value of ES

28h

WORD

(ret) value of FLAGS after call

2Ah

N DWORDs

(call) stack parameters for INT 15/AH=12h call
(ret) stack results from INT 15/AH=12h call

---function 0026h---

18h

WORD

(call) Network Manager subfunction (see #00559)
(ret) status??? (0000h on error)

1Ah

WORD

(call) size of parameter data
ret) size of returned data

1Ch

N BYTEs

(call) parameter data required by call (see #00560,#00561,#00577)
(ret) result data (see #00570,#00571,#00576)

---function 0027h---

18h

WORD

(ret) status:
0000h - if successful
FFFFh - on error

1Ah

WORD

socket's file handle

---functions 0028h,0029h---

18h WORD (call) file handle for which to set priority low/high FFFFh to change calling task's priority

---function 002Ah---

no additional fields