network.h

上一个上传的有问题,这个是好的。visopsys包括系统内核和GUI的全部SOURCE code ,还包括一些基本的docs文档。里面src子目录对应所有SOURCE code.对于想研究操作系统的朋

// 
//  Visopsys
//  Copyright (C) 1998-2007 J. Andrew McLaughlin
//  
//  This library is free software; you can redistribute it and/or modify it
//  under the terms of the GNU Lesser General Public License as published by
//  the Free Software Foundation; either version 2.1 of the License, or (at
//  your option) any later version.
//
//  This library is distributed in the hope that it will be useful, but
//  WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser
//  General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public License
//  along with this library; if not, write to the Free Software Foundation,
//  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
//  network.h
//

// This file contains definitions and structures for using network
// functions in Visopsys.

#if !defined(_NETWORK_H)

#define NETWORK_MAX_HOSTNAMELENGTH      32
#define NETWORK_MAX_DOMAINNAMELENGTH    (256 - NETWORK_MAX_HOSTNAMELENGTH)
#define NETWORK_MAX_ADAPTERS            16
#define NETWORK_ADAPTER_MAX_NAMELENGTH  32

// Flags for network devices
#define NETWORK_ADAPTERFLAG_INITIALIZED  0x8000
#define NETWORK_ADAPTERFLAG_RUNNING      0x4000
#define NETWORK_ADAPTERFLAG_LINK         0x2000
#define NETWORK_ADAPTERFLAG_AUTOCONF     0x1000
#define NETWORK_ADAPTERFLAG_PROMISCUOUS  0x0008
#define NETWORK_ADAPTERFLAG_AUTOSTRIP    0x0004
#define NETWORK_ADAPTERFLAG_AUTOPAD      0x0002
#define NETWORK_ADAPTERFLAG_AUTOCRC      0x0001

// Since for now, we only support ethernet at the link layer, max packet
// size is the upper size limit of an ethernet frame.
#define NETWORK_PACKET_MAX_LENGTH       1518
#define NETWORK_MAX_ETHERDATA_LENGTH    1500

// Lengths of addresses for protocols
#define NETWORK_ADDRLENGTH_ETHERNET     6
#define NETWORK_ADDRLENGTH_IP           4

// Supported protocols.  Link layer protocols:
#define NETWORK_LINKPROTOCOL_ETHERNET   1
// Supported network layer protocols:
#define NETWORK_NETPROTOCOL_IP          1
// Supported top-level (transport layer) protocols, or network layer ones
// that have no corresponding transport protocol.  Where applicable,
// these match the IANA assigned IP protocol numbers:
#define NETWORK_TRANSPROTOCOL_ICMP      1
#define NETWORK_TRANSPROTOCOL_TCP       6
#define NETWORK_TRANSPROTOCOL_UDP       17

// TCP/UDP port numbers we care about
#define NETWORK_PORT_BOOTPSERVER        67  // TCP/UDP: BOOTP/DHCP Server
#define NETWORK_PORT_BOOTPCLIENT        68  // TCP/UDP: BOOTP/DHCP Client

// Types of network connections, in order of ascending abstraction
#define NETWORK_HEADERS_NONE            0
#define NETWORK_HEADERS_TRANSPORT       1
#define NETWORK_HEADERS_NET             2
#define NETWORK_HEADERS_RAW             3

// Mode flags for network connections
#define NETWORK_MODE_LISTEN             0x04
#define NETWORK_MODE_READ               0x02
#define NETWORK_MODE_WRITE              0x01
#define NETWORK_MODE_READWRITE          (NETWORK_MODE_READ | \
					 NETWORK_MODE_WRITE)
// ICMP message types
#define NETWORK_ICMP_ECHOREPLY          0
#define NETWORK_ICMP_DESTUNREACHABLE    3
#define NETWORK_ICMP_SOURCEQUENCH       4
#define NETWORK_ICMP_REDIRECT           5
#define NETWORK_ICMP_ECHO               8
#define NETWORK_ICMP_TIMEEXCEEDED       11
#define NETWORK_ICMP_PARAMPROBLEM       12
#define NETWORK_ICMP_TIMESTAMP          13
#define NETWORK_ICMP_TIMESTAMPREPLY     14
#define NETWORK_ICMP_INFOREQUEST        15
#define NETWORK_ICMP_INFOREPLY          16

#define NETWORK_PING_DATASIZE           56

#define networkAddressesEqual(addr1, addr2, addrSize)                        \
  ((((addr1)->quad) & (0xFFFFFFFFFFFFFFFFULL >> (8 * (8 - (addrSize))))) ==  \
   (((addr2)->quad) & (0xFFFFFFFFFFFFFFFFULL >> (8 * (8 - (addrSize))))))

// Generic 64-bit, byte-addressable network address, logical or physical.
// Actual length is obviously protocol-specific
typedef union {
  unsigned char bytes[8];
  unsigned long long quad;

} __attribute__((packed)) networkAddress;

// A network adapter device
typedef struct {
  char name[NETWORK_ADAPTER_MAX_NAMELENGTH];
  unsigned flags;
  // Physical network address
  networkAddress hardwareAddress;
  // Logical host address
  networkAddress hostAddress;
  // Net mask
  networkAddress netMask;
  // Broadcast address
  networkAddress broadcastAddress;
  // Gateway address
  networkAddress gatewayAddress;
  // Link protocol
  int linkProtocol;
  // Interrupt lint
  int interruptNum;
  // Queues
  int recvQueued;
  int recvQueueLen;
  int transQueued;
  int transQueueLen;
  // Statistics
  unsigned recvPackets;
  unsigned recvErrors;
  unsigned recvDropped;
  unsigned recvOverruns;
  unsigned transPackets;
  unsigned transErrors;
  unsigned transDropped;
  unsigned transOverruns;
  unsigned collisions;

} networkDevice;

// This structure is used to filter packets to network connections.
typedef struct {
  int headers;
  int linkProtocol;
  int netProtocol;
  int transProtocol;
  int subProtocol;
  int localPort;
  int remotePort;

} networkFilter;

// Protocol things

typedef struct {
  unsigned char dest[NETWORK_ADDRLENGTH_ETHERNET];
  unsigned char source[NETWORK_ADDRLENGTH_ETHERNET];
  unsigned short type;

} __attribute__((packed)) networkEthernetHeader;

typedef struct {
  unsigned char versionHeaderLen;
  unsigned char typeOfService;
  unsigned short totalLength;
  unsigned short identification;
  unsigned short flagsFragOffset;
  unsigned char timeToLive;
  unsigned char protocol;
  unsigned short headerChecksum;
  unsigned srcAddress;
  unsigned destAddress;

} __attribute__((packed)) networkIpHeader;

typedef struct {
  unsigned char type;
  unsigned char code;
  unsigned short checksum;

} __attribute__((packed)) networkIcmpHeader;

typedef struct {
  unsigned short srcPort;
  unsigned short destPort;
  unsigned sequenceNum;
  unsigned ackNum;
  unsigned short dataOffsetFlags;
  unsigned short window;
  unsigned short checksum;
  unsigned short urgentPointer;

} __attribute__((packed)) networkTcpHeader;

typedef struct {
  unsigned short srcPort;
  unsigned short destPort;
  unsigned short length;
  unsigned short checksum;

} __attribute__((packed)) networkUdpHeader;

typedef struct {
  networkIcmpHeader icmpHeader;
  unsigned short identifier;
  unsigned short sequenceNum;
  unsigned char data[NETWORK_PING_DATASIZE];

} __attribute__((packed)) networkPingPacket;

#define _NETWORK_H
#endif