HP UX 11i v2 Networking Software manual Connectionless Mode, Snap SAP

Sample Programs

Connectionless Mode

Connectionless 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

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

/************************************************************************** The main part of this program is composed of two parts.

The first part demonstrates data transfer over a connectionless stream with LLC SAP headers. The second part of this program demonstrates data transfer over a connectionless stream with LLC SNAP headers.

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

#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 */
#define SNAP_SAP	0xAA	/*	SNAP SAP */

/************************************************************************* SNAP protocol values.

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

u_char SEND_SNAP_SAP[5] = {0x50, 0x00, 0x00, 0x00, 0x00}; u_char RECV_SNAP_SAP[5] = {0x60, 0x00, 0x00, 0x00, 0x00};

/************************************************************************* 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 */
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 = {

156 Appendix A