This is sockets/id_echo.h (Listing 60-1, page 1240), an example from the book, The Linux Programming Interface.

The source code file is copyright 2022, Michael Kerrisk, and is licensed under the GNU General Public License, version 3.

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In the listing below, the names of Linux system calls and C library functions are hyperlinked to manual pages from the Linux man-pages project, and the names of functions implemented in the book are hyperlinked to the implementations of those functions.


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/* id_echo.h

   Header file for id_echo_sv.c and id_echo_cl.c.
#include "inet_sockets.h"       /* Declares our socket functions */
#include "tlpi_hdr.h"

#define SERVICE "echo"          /* Name of UDP service */

#define BUF_SIZE 500            /* Maximum size of datagrams that can
                                   be read by client and server */


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