LLA and DLPI Example Programs
DLPI Example Program
DLPI Example Program
/*********************************************************************
(C)COPYRIGHT
*********************************************************************/
/********************************************************************* 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 | */ |
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Chapter 2 | 21 |
