Metrologic Optimus R, Руководство по программированию

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142 "C" Programming Guide For Optimus S/R
Socket Programming Interface
Include File
#include <errno.h>
This "errno.h file contains the error code definitions, and it should normally be
placed
under the "include" directory of the C compiler (say,
"C:\TOSHIBA\INCLUDE\").
Note: For relevant structures, please refer to the header file for terminal specific library.
Connection-oriented Protocol (TCP)
For a connection-oriented socket, such as SOCK_STREAM, it provides full-duplex
connection, and must be in a connected state before any data can be sent or received
on it. A connection to another socket is created with
connect() . Once connected, data
can be transferred using send() and recv() . When a session has been completed,
closesocket() must be performed.