HP UX 11i v2 Networking Software manual Connection Mode, Longareasize

Sample Programs

Connection Mode

Connection Mode

/**************************************************************************

(C)COPYRIGHT HEWLETT-PACKARD COMPANY 1992. ALL RIGHTS RESERVED. NO PART OF THIS PROGRAM MAY BE PHOTOCOPIED, REPRODUCED, OR TRANSLATED TO ANOTHER PROGRAM LANGUAGE WITHOUT THE PRIOR WRITTEN CONSENT OF HEWLETT PACKARD COMPANY

**************************************************************************/

/************************************************************************** This program demonstrates data transfer over a connection oriented DLPI stream. It also demonstrates connection handoff.

**************************************************************************/

#include <stdio.h> #include <fcntl.h> #include <memory.h> #include <sys/types.h> #include <sys/stream.h> #include <sys/stropts.h> #include <sys/dlpi.h> #include <sys/dlpi_ext.h>

#define	SEND_SAP	0x80	/*	sending SAP */
#define	RECV_SAP	0x82	/*	receiving SAP */

/************************************************************************** global areas for sending and receiving messages

**************************************************************************/

#define	AREA_SIZE 5000	/* bytes; big enough for largest possible	msg */
#define	LONG_AREA_SIZE	(AREA_SIZE / sizeof(u_long)) /* AREA_SIZE /	4 */

/* these are u_long arrays instead of u_char to insure proper alignment */
u_long	ctrl_area[LONG_AREA_SIZE];	/*	for control messages */
u_long	data_area[LONG_AREA_SIZE];	/*	for data messages */

struct strbuf ctrl_buf = {
AREA_SIZE,	/* maxlen = AREA_SIZE */
0,	/* len gets filled in for each message */
ctrl_area	/* buf = control area */
};
struct strbuf data_buf = {
AREA_SIZE,	/* maxlen = AREA_SIZE */
0,	/* len gets filled in for each message */
data_area	/* buf = data area */
};

/************************************************************************ get the next message from a stream; get_msg() returns one of the following defines

************************************************************************/

144 Appendix A