source: MondoRescue/branches/stable/mindi-busybox/networking/udhcp/dhcpd.h@ 904

/* dhcpd.h */
#ifndef _DHCPD_H
#define _DHCPD_H

#include <netinet/ip.h>
#include <netinet/udp.h>

#include "libbb_udhcp.h"
#include "leases.h"

/************************************/
/* Defaults _you_ may want to tweak */
/************************************/

/* the period of time the client is allowed to use that address */
#define LEASE_TIME              (60*60*24*10) /* 10 days of seconds */
#define LEASES_FILE     "/var/lib/misc/udhcpd.leases"

/* where to find the DHCP server configuration file */
#define DHCPD_CONF_FILE         "/etc/udhcpd.conf"

/*****************************************************************/
/* Do not modify below here unless you know what you are doing!! */
/*****************************************************************/

/* DHCP protocol -- see RFC 2131 */
#define SERVER_PORT     67
#define CLIENT_PORT     68

#define DHCP_MAGIC      0x63825363

/* DHCP option codes (partial list) */
#define DHCP_PADDING        0x00
#define DHCP_SUBNET     0x01
#define DHCP_TIME_OFFSET    0x02
#define DHCP_ROUTER     0x03
#define DHCP_TIME_SERVER    0x04
#define DHCP_NAME_SERVER    0x05
#define DHCP_DNS_SERVER     0x06
#define DHCP_LOG_SERVER     0x07
#define DHCP_COOKIE_SERVER  0x08
#define DHCP_LPR_SERVER     0x09
#define DHCP_HOST_NAME      0x0c
#define DHCP_BOOT_SIZE      0x0d
#define DHCP_DOMAIN_NAME    0x0f
#define DHCP_SWAP_SERVER    0x10
#define DHCP_ROOT_PATH      0x11
#define DHCP_IP_TTL     0x17
#define DHCP_MTU        0x1a
#define DHCP_BROADCAST      0x1c
#define DHCP_NTP_SERVER     0x2a
#define DHCP_WINS_SERVER    0x2c
#define DHCP_REQUESTED_IP   0x32
#define DHCP_LEASE_TIME     0x33
#define DHCP_OPTION_OVER    0x34
#define DHCP_MESSAGE_TYPE   0x35
#define DHCP_SERVER_ID      0x36
#define DHCP_PARAM_REQ      0x37
#define DHCP_MESSAGE        0x38
#define DHCP_MAX_SIZE       0x39
#define DHCP_T1         0x3a
#define DHCP_T2         0x3b
#define DHCP_VENDOR     0x3c
#define DHCP_CLIENT_ID      0x3d
#define DHCP_FQDN       0x51

#define DHCP_END        0xFF


#define BOOTREQUEST     1
#define BOOTREPLY       2

#define ETH_10MB        1
#define ETH_10MB_LEN        6

#define DHCPDISCOVER        1
#define DHCPOFFER       2
#define DHCPREQUEST     3
#define DHCPDECLINE     4
#define DHCPACK         5
#define DHCPNAK         6
#define DHCPRELEASE     7
#define DHCPINFORM      8

#define BROADCAST_FLAG      0x8000

#define OPTION_FIELD        0
#define FILE_FIELD      1
#define SNAME_FIELD     2

/* miscellaneous defines */
#define MAC_BCAST_ADDR      (uint8_t *) "\xff\xff\xff\xff\xff\xff"
#define OPT_CODE 0
#define OPT_LEN 1
#define OPT_DATA 2

struct option_set {
    uint8_t *data;
    struct option_set *next;
};

struct static_lease {
    uint8_t *mac;
    uint32_t *ip;
    struct static_lease *next;
};

struct server_config_t {
    uint32_t server;        /* Our IP, in network order */
    uint32_t start;         /* Start address of leases, network order */
    uint32_t end;           /* End of leases, network order */
    struct option_set *options; /* List of DHCP options loaded from the config file */
    char *interface;        /* The name of the interface to use */
    int ifindex;            /* Index number of the interface to use */
    uint8_t arp[6];         /* Our arp address */
    unsigned long lease;        /* lease time in seconds (host order) */
    unsigned long max_leases;   /* maximum number of leases (including reserved address) */
    char remaining;         /* should the lease file be interpreted as lease time remaining, or
                     * as the time the lease expires */
    unsigned long auto_time;    /* how long should udhcpd wait before writing a config file.
                     * if this is zero, it will only write one on SIGUSR1 */
    unsigned long decline_time; /* how long an address is reserved if a client returns a
                     * decline message */
    unsigned long conflict_time;    /* how long an arp conflict offender is leased for */
    unsigned long offer_time;   /* how long an offered address is reserved */
    unsigned long min_lease;    /* minimum lease a client can request*/
    char *lease_file;
    char *pidfile;
    char *notify_file;      /* What to run whenever leases are written */
    uint32_t siaddr;        /* next server bootp option */
    char *sname;            /* bootp server name */
    char *boot_file;        /* bootp boot file option */
    struct static_lease *static_leases; /* List of ip/mac pairs to assign static leases */
};

extern struct server_config_t server_config;
extern struct dhcpOfferedAddr *leases;


#endif