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/* Copyright (c) 1991 NeXT Computer, Inc. All rights reserved.
*
* tokendefs.h - Token-Ring MAC header definitions.
*
* HISTORY
* 8-Oct-92 Joel Greenblatt at NeXT
* created
*/
#import <sys/errno.h>
/*
* Token ring address - 6 octets
*/
#define NUM_TR_ADDR_BYTES 6
struct token_addr {
u_char token_addr_octet[NUM_TR_ADDR_BYTES];
};
#define ta_byte token_addr_octet
typedef struct token_addr token_addr_t;
/*
* MAC header size
*/
#define MAC_HDR_MIN (1+1+6+6) /* MAC hdr size w/o ri field */
#define MAC_HDR_MAX (MAC_HDR_MIN + RISIZE) /* MAC hdr size w/max ri */
/*
* The maximum size of the MAC information field as spec'd by ISO 8802/5.
*/
#define MAC_INFO_4MB 4472 /* max size of mac info field -- 4 Mbs */
#define MAC_INFO_16MB 17800 /* max size of mac info field -- 16 Mbs */
/*
* Maximum DMA packet sizes for 4 & 16 Mbit assuming no CRC.
*/
#define MAC_DMA_MAX_4MB (MAC_HDR_MAX + MAC_INFO_4MB)
#define MAC_DMA_MAX_16MB (MAC_HDR_MAX + MAC_INFO_16MB)
/*
* Routing control field.
*/
typedef struct {
#if __BIG_ENDIAN__
unsigned char bcast : 3, /* broadcast */
len : 5; /* length */
unsigned char dir : 1, /* direction */
longf : 3, /* longest frame */
rsrvd : 4; /* reserved */
#elif __LITTLE_ENDIAN__
unsigned char len : 5, /* length */
bcast : 3; /* broadcast */
unsigned char rsrvd : 4, /* reserved */
longf : 3, /* longest frame */
dir : 1; /* direction */
#else
error
#endif
} routing_ctl_t;
/* bcast field ... */
#define BI_SPECIFIC 0 /* b'0xx': non-broadcast (specific route) */
#define BI_AR_BCAST 4 /* b'10x': all-routes broadcast */
#define BI_SR_BCAST 6 /* b'11x': single-route broadcast */
/*
* longf field
*/
#define LF_S516 0
#define LF_S1500 1
#define LF_S2052 2
#define LF_S4472 3
#define LF_S8144 4
#define LF_S11407 5
#define LF_S17800 6
#define LF_BCAST 7 /* All-routes broadcast */
#define LFB_4MB LF_S4472 /* encoded max info -- 4 Mb */
#define LFB_16MB LF_S17800 /* encoded max info -- 16 Mb */
/*
* Source Routing field (2-18 bytes, must be even)
*/
#define RISIZE 18 /* max size (bytes) of 802.5 routing field */
typedef struct {
routing_ctl_t rc;
u_char sn[RISIZE-sizeof(routing_ctl_t)];
} sroute_t;
/*
* Token Ring MAC header (IEEE 802.5, ISO 8802/5)
*/
#define TR_DA_SIZE 6
typedef struct {
u_char ac; /* PPPTMRRR; PPP = token priority */
u_char fc; /* FFrrZZZZ; FF = frame type */
#define TR_FC_MASK 0xc0 /* mask for frame-type */
#define TR_FC_MAC 0x00 /* frame-type = mac frame */
#define TR_FC_DATA 0x40 /* frame-type = non-mac (data frame) */
u_char da[TR_DA_SIZE]; /* destination address */
u_char sa[TR_DA_SIZE]; /* source address */
#define TR_RII 0x80 /* routing info indicator bit */
sroute_t ri; /* routing information field */
} tokenHeader_t;
/*
* token-ring netif definitions
*/
#define IFTYPE_TOKENRING "4/16Mb Token-Ring" /* netif type-string */
/*
* Error codes
*/
#define TRINGDOWN ENETDOWN /* interface down*/
#define TNOBUFS ENOBUFS /* transmit queue full error*/
#define TBADDA EINVAL /* bad dest addr*/
#define TBADFSIZE EMSGSIZE /* bad frame size*/
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.