dhcpd.h

用于嵌入式系统的TCP/IP协议栈及若干服务

/*
*            Copyright (c) 1998-2001 by NETsilicon Inc.
*
*  This software is copyrighted by and is the sole property of
*  NETsilicon.  All rights, title, ownership, or other interests
*  in the software remain the property of NETsilicon.  This
*  software may only be used in accordance with the corresponding
*  license agreement.  Any unauthorized use, duplication, transmission,
*  distribution, or disclosure of this software is expressly forbidden.
*
*  This Copyright notice may not be removed or modified without prior
*  written consent of NETsilicon.
*
*  NETsilicon, reserves the right to modify this software
*  without notice.
*
*  NETsilicon
*  411 Waverley Oaks Road                  USA 781.647.1234
*  Suite 227                               http://www.netsilicon.com
*  Waltham, MA 02452                       [e-mail]
*
*************************************************************************
*  $Name: Fusion 6.52 Fusion 6.51 $
*  $Date: 2001/09/19 10:38:31 $
*  $Source: M:/psisrc/dhcp_svr/incl/rcs/dhcpd.h $
*  $Revision: 1.2 $
**************************************************************************
*  File Description:
*           DHCP include file.  For use by DHCP library files only.
*
**************************************************************************/
#define MAGIC_COOKIE	0x63825363	/* magic cookie in the option field */
#define MAGIC_COOKIE_U8    99,130,83,99   /* equiv to MAGIC_COOKIE in dhcp.h */

#define MAXNOPT 312                 /* max number of DHCP options */


#define DEFAULT_LEASE_TIME	180*60		/* default lease time in second */
#define INFINITE_LEASE_TIME	0xffffffffL	/* infinite lease time */

#define N_REXMIT_DISCOVER   4       /* # of rexmit of DHCPDISCOVER msg */
#define N_REXMIT_REQUEST    10
#define N_REXMIT_REQ_REBOOT 4



/* UDP port numbers for DHCP */
#define DHCP_SERVER_PORT    67      /* from client to server */
#define DHCP_CLIENT_PORT    68      /* from server to client */


/* DHCP message OP code */
#define BOOTREQUEST         1
#define BOOTREPLY           2

/* DHCP message type */
#define DHCP_DISCOVER       1
#define DHCP_OFFER          2
#define DHCP_REQUEST        3
#define DHCP_DECLINE        4
#define DHCP_ACK            5
#define DHCP_NAK            6
#define DHCP_RELEASE        7
#define DHCP_INFORM         8



typedef u8 DHCP_MESSAGE;
#define DHCP_OP     0		        /* message type, 1 byte */
#define DHCP_HTYPE  DHCP_OP+1       /* hardware address type, 1 byte */
#define DHCP_HLEN	DHCP_HTYPE+1    /* hardware address length, 1 byte */
#define DHCP_HOPS   DHCP_HLEN+1     /* should be zero in client's message, 1 byte */
#define DHCP_XID    DHCP_HOPS+1     /* transaction id, 4 bytes */
#define DHCP_SECS   DHCP_XID+4      /* elapssed time in sec. from trying to boot, 2 bytes */
#define DHCP_FLAGS  DHCP_SECS+2     /* 2 bytes */
#define DHCP_CIADDR DHCP_FLAGS+2    /* (previously allocated) client IP address, 4 bytes */
#define DHCP_YIADDR DHCP_CIADDR+4   /* 'your' client IP address, 4 bytes */
#define DHCP_SIADDR DHCP_YIADDR+4   /* should be zero in client's messages, 4 bytes */
#define DHCP_GIADDR DHCP_SIADDR+4   /* should be zero in client's messages, 4 bytes */
#define DHCP_CHADDR DHCP_GIADDR+4   /* client's hardware address, 16 bytes */
#define DHCP_SNAME  DHCP_CHADDR+16  /* server host name, null terminated string, 64 bytes */
#define DHCP_FILE   DHCP_SNAME+64   /* boot file name, null terminated string, 128 bytes */
#define DHCP_OPTIONS DHCP_FILE+128  /* message options, MAXOPT bytes */
#define SIZEOF_DHCP_MESSAGE (DHCP_OPTIONS + MAXNOPT)


#define ETH_P_ARP   0x0806
#define ETH_P_IP    2048

#define ARPOP_REQUEST 1
#define ARPOP_REPLY 2
#define ARPHRD_ETHER 1
 



/* DHCP option type
 */
enum {
	OT_STRING = 1,				/* string */
	OT_ADDR	  = 2				/* addresses */
};


/* DHCP option and value (cf. RFC1533) */
#define PAD_OPTION              0
#define END_OPTION              255
#define SUBNET_MASK                 1
#define TIMER_OFFSET                2
#define ROUTERS_ON_SUBNET           3
#define TIME_SERVER                 4
#define NAME_SERVER                 5
#define DNS                         6
#define LOG_SERVER                  7
#define COOKIE_SERVER               8
#define LPR_SERVER                  9
#define IMPRESS_SERVER              10
#define RESOURCE_LOCATION_SERVER    11
#define HOST_NAME                   12
#define BOOT_FILE_SIZE              13
#define MERIT_DUMP_FILE             14
#define DOMAIN_NAME                 15
#define SWAP_SERVER                 16
#define ROOT_PATH                   17
#define EXTENTIONS_PATH             18
#define IP_FORWARDING               19
#define NON_LOCAL_SOURCE_ROUTING    20
#define POLICY_FILTER               21
#define MAX_DGRAM_REASM_SIZE        22
#define DEFAULT_IP_TTL              23
#define PATH_MTU_AGING_TIMEOUT      24
#define PATH_MTU_PLATEAU_TABLE      25
#define IF_MTU                      26
#define ALL_SUBNETS_LOCAL           27
#define BROADCAST_ADDR              28
#define PERFORM_MASK_DISCOVERY      29
#define MASK_SUPPLIER               30
#define PERFORM_ROUTER_DISCOVERY    31
#define ROUTER_SOLICITATION_ADDR    32
#define STATIC_ROUTE                33
#define TRAILER_ENCAPSULATION       34
#define ARP_CACHE_TIMEOUT           35
#define ETHERNET_ENCAPSULATION      36
#define TCP_DEFAULT_TTL             37
#define TCP_KEEP_ALIVE_INTERVAL     38
#define TCP_KEEP_ALIVE_GARBAGE      39
#define NIS_DOMAIN_NAME             40
#define NIS_SERVERS                 41
#define NTP_SERVERS                 42
#define VENDOR_SPECIFIC_INFO        43
#define NET_BIOS_NAME_SERVER        44
#define NET_BIOS_DGRAM_DIST_SERVER  45
#define NET_BIOS_NODE_TYPE          46
#define NET_BIOS_SCOPE              47
#define X_FONT_SERVER               48
#define X_DISPLAY_MANAGER           49
#define DHCP_REQUESTED_IP_ADDR      50
#define DHCP_IP_ADDR_LEASE_TIME     51
#define DHCP_OPTION_OVERLOAD        52
#define DHCP_MESSAGE_TYPE           53
#define DHCP_SERVER_IDENTIFIER      54
#define DHCP_PARAM_REQUEST          55
#define DHCP_MSG                    56
#define DHCP_MAX_MSG_SIZE           57
#define DHCP_T1_VALUE               58
#define DHCP_T2_VALUE               59
#define DHCP_CLASS_IDENTIFIER       60
#define DHCP_CLIENT_IDENTIFIER      61


#ifdef DHCPD_DEBUG
#define DHCPD_DEBUG0(s)       os_printf(s)
#define DHCPD_DEBUG1(s,x)     os_printf(s,x)
#define DHCPD_DEBUG2(s,x,y)   os_printf(s,x,y)
#define DHCPD_DEBUG3(s,x,y,z) os_printf(s,x,y,z)
#define DHCPD_DEBUG4(s,w,x,y,z) os_printf(s,w,x,y,z)
#else
#define DHCPD_DEBUG0(s)
#define DHCPD_DEBUG1(s,x)
#define DHCPD_DEBUG2(s,x,y)
#define DHCPD_DEBUG3(s,x,y,z)
#define DHCPD_DEBUG4(s,w,x,y,z)
#endif