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    Contents of /trunk/mkinitrd-magellan/busybox/networking/udhcp/dhcpd.h

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    Revision 816 - (show annotations) (download)
    Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
    File MIME type: text/plain
    File size: 4680 byte(s) 
    -updated to busybox-1.13.4
    1 /* vi: set sw=4 ts=4: */
    2 /* dhcpd.h */
    3
    4 #ifndef _DHCPD_H
    5 #define _DHCPD_H
    6
    7 #if __GNUC_PREREQ(4,1)
    8 # pragma GCC visibility push(hidden)
    9 #endif
    10
    11 /************************************/
    12 /* Defaults _you_ may want to tweak */
    13 /************************************/
    14
    15 /* the period of time the client is allowed to use that address */
    16 #define LEASE_TIME (60*60*24*10) /* 10 days of seconds */
    17 #define LEASES_FILE CONFIG_DHCPD_LEASES_FILE
    18
    19 /* where to find the DHCP server configuration file */
    20 #define DHCPD_CONF_FILE "/etc/udhcpd.conf"
    21
    22 struct option_set {
    23 uint8_t *data;
    24 struct option_set *next;
    25 };
    26
    27 struct static_lease {
    28 struct static_lease *next;
    29 uint8_t *mac;
    30 uint32_t *ip;
    31 };
    32
    33 struct server_config_t {
    34 uint32_t server; /* Our IP, in network order */
    35 #if ENABLE_FEATURE_UDHCP_PORT
    36 uint16_t port;
    37 #endif
    38 /* start,end are in host order: we need to compare start <= ip <= end */
    39 uint32_t start_ip; /* Start address of leases, in host order */
    40 uint32_t end_ip; /* End of leases, in host order */
    41 struct option_set *options; /* List of DHCP options loaded from the config file */
    42 char *interface; /* The name of the interface to use */
    43 int ifindex; /* Index number of the interface to use */
    44 uint8_t arp[6]; /* Our arp address */
    45 char remaining; /* should the lease file be interpreted as lease time remaining, or
    46 * as the time the lease expires */
    47 uint32_t lease; /* lease time in seconds (host order) */
    48 uint32_t max_leases; /* maximum number of leases (including reserved address) */
    49 uint32_t auto_time; /* how long should udhcpd wait before writing a config file.
    50 * if this is zero, it will only write one on SIGUSR1 */
    51 uint32_t decline_time; /* how long an address is reserved if a client returns a
    52 * decline message */
    53 uint32_t conflict_time; /* how long an arp conflict offender is leased for */
    54 uint32_t offer_time; /* how long an offered address is reserved */
    55 uint32_t min_lease; /* minimum lease a client can request */
    56 char *lease_file;
    57 char *pidfile;
    58 char *notify_file; /* What to run whenever leases are written */
    59 uint32_t siaddr; /* next server bootp option */
    60 char *sname; /* bootp server name */
    61 char *boot_file; /* bootp boot file option */
    62 struct static_lease *static_leases; /* List of ip/mac pairs to assign static leases */
    63 };
    64
    65 #define server_config (*(struct server_config_t*)&bb_common_bufsiz1)
    66 /* client_config sits in 2nd half of bb_common_bufsiz1 */
    67
    68 #if ENABLE_FEATURE_UDHCP_PORT
    69 #define SERVER_PORT (server_config.port)
    70 #else
    71 #define SERVER_PORT 67
    72 #endif
    73
    74 extern struct dhcpOfferedAddr *leases;
    75
    76
    77 /*** leases.h ***/
    78
    79 struct dhcpOfferedAddr {
    80 uint8_t chaddr[16];
    81 uint32_t yiaddr; /* network order */
    82 uint32_t expires; /* host order */
    83 };
    84
    85 struct dhcpOfferedAddr *add_lease(const uint8_t *chaddr, uint32_t yiaddr, unsigned long lease) FAST_FUNC;
    86 int lease_expired(struct dhcpOfferedAddr *lease) FAST_FUNC;
    87 struct dhcpOfferedAddr *find_lease_by_chaddr(const uint8_t *chaddr) FAST_FUNC;
    88 struct dhcpOfferedAddr *find_lease_by_yiaddr(uint32_t yiaddr) FAST_FUNC;
    89 uint32_t find_address(int check_expired) FAST_FUNC;
    90
    91
    92 /*** static_leases.h ***/
    93
    94 /* Config file will pass static lease info to this function which will add it
    95 * to a data structure that can be searched later */
    96 int addStaticLease(struct static_lease **lease_struct, uint8_t *mac, uint32_t *ip) FAST_FUNC;
    97 /* Check to see if a mac has an associated static lease */
    98 uint32_t getIpByMac(struct static_lease *lease_struct, void *arg) FAST_FUNC;
    99 /* Check to see if an ip is reserved as a static ip */
    100 uint32_t reservedIp(struct static_lease *lease_struct, uint32_t ip) FAST_FUNC;
    101 /* Print out static leases just to check what's going on (debug code) */
    102 void printStaticLeases(struct static_lease **lease_struct) FAST_FUNC;
    103
    104
    105 /*** serverpacket.h ***/
    106
    107 int send_offer(struct dhcpMessage *oldpacket) FAST_FUNC;
    108 int send_NAK(struct dhcpMessage *oldpacket) FAST_FUNC;
    109 int send_ACK(struct dhcpMessage *oldpacket, uint32_t yiaddr) FAST_FUNC;
    110 int send_inform(struct dhcpMessage *oldpacket) FAST_FUNC;
    111
    112
    113 /*** files.h ***/
    114
    115 void read_config(const char *file) FAST_FUNC;
    116 void write_leases(void) FAST_FUNC;
    117 void read_leases(const char *file) FAST_FUNC;
    118 struct option_set *find_option(struct option_set *opt_list, uint8_t code) FAST_FUNC;
    119
    120
    121 #if __GNUC_PREREQ(4,1)
    122 # pragma GCC visibility pop
    123 #endif
    124
    125 #endif