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/*
* Mach Operating System
* Copyright (c) 1991,1990,1989 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* Author: David B. Golub, Carnegie Mellon University
* Date: 3/89
*
* Status information for network interfaces.
*/
#ifndef _DEVICE_NET_STATUS_H_
#define _DEVICE_NET_STATUS_H_
#include <device/device_types.h>
#include <mach/message.h>
/*
* General interface status
*/
struct net_status {
int min_packet_size; /* minimum size, including header */
int max_packet_size; /* maximum size, including header */
int header_format; /* format of network header */
int header_size; /* size of network header */
int address_size; /* size of network address */
int flags; /* interface status */
int mapped_size; /* if mappable, virtual mem needed */
};
#define NET_STATUS_COUNT (sizeof(struct net_status)/sizeof(int))
#define NET_STATUS (('n'<<16) + 1)
/*
* Header formats, as given by RFC 826/1010 for ARP:
*/
#define HDR_ETHERNET 1 /* Ethernet hardware address */
#define HDR_EXP_ETHERNET 2 /* 3Mhz experimental Ethernet
hardware address */
#define HDR_PRO_NET 4 /* Proteon ProNET Token Ring */
#define HDR_CHAOS 5 /* Chaosnet */
#define HDR_802 6 /* IEEE 802 networks */
/*
* A network address is an array of bytes. In order to return
* this in an array of (long) integers, it is returned in net order.
* Use 'ntohl' on each element of the array to retrieve the original
* ordering.
*/
#define NET_ADDRESS (('n'<<16) + 2)
#define NET_DSTADDR (('n'<<16) + 3)
#define NET_FLAGS (('n'<<16) + 4)
/*
* Input packet filter definition
*/
#define NET_MAX_FILTER 128 /* was 64, bpf programs are big */
#define NET_FILTER_STACK_DEPTH 32
/*
* We allow specification of up to NET_MAX_FILTER (short) words of a filter
* command list to be applied to incoming packets to determine if
* those packets should be given to a particular network input filter.
*
* Each network filter specifies the filter command list via net_add_filter.
* Each filter command list specifies a sequences of actions which leave a
* boolean value on the top of an internal stack. Each word of the
* command list specifies an action from the set {PUSHLIT, PUSHZERO,
* PUSHWORD+N} which respectively push the next word of the filter, zero,
* or word N of the incoming packet on the stack, and a binary operator
* from the set {EQ, LT, LE, GT, GE, AND, OR, XOR} which operates on the
* top two elements of the stack and replaces them with its result. The
* special action NOPUSH and the special operator NOP can be used to only
* perform the binary operation or to only push a value on the stack.
*
* If the final value of the filter operation is true, then the packet is
* accepted for the filter.
*
* The first filter_t object is a header which allows to set flags for the
* filter code. Main flags concern the direction of packets. This header is
* split in the same way NETF words are : the 6 MSB bits indicate the type
* of filter while the 10 LSB bits are the flags. For native NETF filters,
* clear the 6 MSB bits (which is why there is no dedicated macro).
*/
typedef unsigned short filter_t;
typedef filter_t *filter_array_t;
#define CSPF_BYTES(n) ((n) * sizeof (filter_t))
/* these must sum to 16! */
#define NETF_NBPA 10 /* # bits / argument */
#define NETF_NBPO 6 /* # bits / operator */
#define NETF_ARG(word) ((word) & 0x3ff)
#define NETF_OP(word) (((word)>>NETF_NBPA)&0x3f)
/* filter types */
#define NETF_TYPE_MASK (((1 << NETF_NBPO) - 1) << NETF_NBPA)
#define NETF_BPF (1 << NETF_NBPA)
/* flags */
#define NETF_IN 0x1
#define NETF_OUT 0x2
/* binary operators */
#define NETF_NOP (0<<NETF_NBPA)
#define NETF_EQ (1<<NETF_NBPA)
#define NETF_LT (2<<NETF_NBPA)
#define NETF_LE (3<<NETF_NBPA)
#define NETF_GT (4<<NETF_NBPA)
#define NETF_GE (5<<NETF_NBPA)
#define NETF_AND (6<<NETF_NBPA)
#define NETF_OR (7<<NETF_NBPA)
#define NETF_XOR (8<<NETF_NBPA)
#define NETF_COR (9<<NETF_NBPA)
#define NETF_CAND (10<<NETF_NBPA)
#define NETF_CNOR (11<<NETF_NBPA)
#define NETF_CNAND (12<<NETF_NBPA)
#define NETF_NEQ (13<<NETF_NBPA)
#define NETF_LSH (14<<NETF_NBPA)
#define NETF_RSH (15<<NETF_NBPA)
#define NETF_ADD (16<<NETF_NBPA)
#define NETF_SUB (17<<NETF_NBPA)
/* stack arguments */
#define NETF_NOPUSH 0 /* don`t push */
#define NETF_PUSHLIT 1 /* next word in filter */
#define NETF_PUSHZERO 2 /* 0 */
#define NETF_PUSHIND 14 /* word indexed by stack top */
#define NETF_PUSHHDRIND 15 /* header word indexed by stack top */
#define NETF_PUSHWORD 16 /* word 0 .. 944 in packet */
#define NETF_PUSHHDR 960 /* word 0 .. 31 in header */
#define NETF_PUSHSTK 992 /* word 0 .. 31 in stack */
/* priorities */
#define NET_HI_PRI 100
#define NET_PRI_MAX 255
/*
* BPF support.
*/
#include <device/bpf.h>
/*
* Net receive message format.
*
* The header and data are packaged separately, since some hardware
* supports variable-length headers. We prefix the packet with
* a packet_hdr structure so that the real data portion begins
* on a long-word boundary, and so that packet filters can address
* the type field and packet size uniformly.
*/
#define NET_RCV_MAX 4095
#define NET_HDW_HDR_MAX 64
#define NET_RCV_MSG_ID 2999 /* in device.defs reply range */
struct packet_header {
unsigned short length;
unsigned short type; /* network order */
};
struct net_rcv_msg {
mach_msg_header_t msg_hdr;
mach_msg_type_t header_type;
char header[NET_HDW_HDR_MAX];
mach_msg_type_t packet_type;
char packet[NET_RCV_MAX];
boolean_t sent;
};
typedef struct net_rcv_msg *net_rcv_msg_t;
#define net_rcv_msg_packet_count packet_type.msgt_number
#endif /* _DEVICE_NET_STATUS_H_ */
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