Denso Power Net Terminal BHT-103 Especificações descarregar pdf (Página 487)

100

101

Chapter 18. TCP/IP

479

Syntax:

CALL "SOCKET.FN3" .fcRcvfrom SOCKFD%,

RECVBUFF$[()], RECVLEN%, RECVMODE%, FAMILY%, PORT%,

address, RECVSIZE% [,RECVFLAG%]

where address is ADDRESS or IPADDRESS$

Description: This function receives data sent to the UDP socket specified by the socket

identifier.

BSD4.4 socket API equivalent: This function is equivalent to the BSD4.4

socket API recvfrom() function.

Parameters:

SOCKFD% Socket identifier

RECVBUFF$[()] Receive buffer

RECVLEN% Maximum number of bytes to receive

RECVMODE% Receive mode

RECVFLAG% Storage method (optional)

The receive buffer (

RECVBUFF$) can be either a string non-array or string

array variable. The maximum size for a string non-array is 255 bytes; for a

string array, 4096.

The receive mode (

RECVMODE%) must be one of the following values:

The protocol family (

FAMILY%) must be 2, the value indicating the ARPA

Internet protocols.

The storage method (

RECVFLAG%) is required for a string array buffer. It

is ignored for a string non-array variable and new data will be written.

The storage method (

RECVFLAG%) must be one of the following values:

Note: If RECVFLAG% is 0 or omitted, the user application program must

initialize the receive buffer string array variable before receiving any data.

Return value:

FAMILY% Protocol family of sending station

PORT% Port number of sending station

ADDRESS Address of sending station

IPADDRESS$ Address of sending station in dotted quad notation

RECVSIZE% Number of bytes received

.fcRcvfrom Receive data sent to the specified UDP socket

.soRvNrm

0 Normal

.soRvPeek

2 Peek at next message

.soINet 2 ARPA Internet protocols

.soRvApend

0 Append data to buffer (default if omitted)

.soRvWrite

1 Overwrite buffer with data

1 2 ... 482 483 484 485 486 487 488 489 490 491 492 ... 576 577

Comentários a estes Manuais

Sem comentários

Denso Power Net Terminal BHT-103 Especificações Página 487

Comentários a estes Manuais

Manuais e produtos relacionados com Leitores de códigos de barras Denso Power Net Terminal BHT-103