5 #include <netinet/ip.h>
6 #include <netinet/udp.h>
10 /************************************/
11 /* Defaults _you_ may want to tweak */
12 /************************************/
14 /* the period of time the client is allowed to use that address */
15 #define LEASE_TIME (60*60*24*10) /* 10 days of seconds */
17 /* where to find the DHCP server configuration file */
18 #define DHCPD_CONF_FILE "/etc/udhcpd.conf"
20 /*****************************************************************/
21 /* Do not modify below here unless you know what you are doing!! */
22 /*****************************************************************/
24 /* DHCP protocol -- see RFC 2131 */
25 #define SERVER_PORT 67
26 #define CLIENT_PORT 68
28 #define DHCP_MAGIC 0x63825363
30 /* DHCP option codes (partial list) */
31 #define DHCP_PADDING 0x00
32 #define DHCP_SUBNET 0x01
33 #define DHCP_TIME_OFFSET 0x02
34 #define DHCP_ROUTER 0x03
35 #define DHCP_TIME_SERVER 0x04
36 #define DHCP_NAME_SERVER 0x05
37 #define DHCP_DNS_SERVER 0x06
38 #define DHCP_LOG_SERVER 0x07
39 #define DHCP_COOKIE_SERVER 0x08
40 #define DHCP_LPR_SERVER 0x09
41 #define DHCP_HOST_NAME 0x0c
42 #define DHCP_BOOT_SIZE 0x0d
43 #define DHCP_DOMAIN_NAME 0x0f
44 #define DHCP_SWAP_SERVER 0x10
45 #define DHCP_ROOT_PATH 0x11
46 #define DHCP_IP_TTL 0x17
48 #define DHCP_BROADCAST 0x1c
49 #define DHCP_NTP_SERVER 0x2a
50 #define DHCP_WINS_SERVER 0x2c
51 #define DHCP_REQUESTED_IP 0x32
52 #define DHCP_LEASE_TIME 0x33
53 #define DHCP_OPTION_OVER 0x34
54 #define DHCP_MESSAGE_TYPE 0x35
55 #define DHCP_SERVER_ID 0x36
56 #define DHCP_PARAM_REQ 0x37
57 #define DHCP_MESSAGE 0x38
58 #define DHCP_MAX_SIZE 0x39
61 #define DHCP_VENDOR 0x3c
62 #define DHCP_CLIENT_ID 0x3d
71 #define ETH_10MB_LEN 6
73 #define DHCPDISCOVER 1
82 #define BROADCAST_FLAG 0x8000
84 #define OPTION_FIELD 0
88 /* miscellaneous defines */
89 #define MAC_BCAST_ADDR (unsigned char *) "\xff\xff\xff\xff\xff\xff"
96 struct option_set *next;
99 struct server_config_t {
100 u_int32_t server; /* Our IP, in network order */
101 u_int32_t start; /* Start address of leases, network order */
102 u_int32_t end; /* End of leases, network order */
103 struct option_set *options; /* List of DHCP options loaded from the config file */
104 char *interface; /* The name of the interface to use */
105 int ifindex; /* Index number of the interface to use */
106 unsigned char arp[6]; /* Our arp address */
107 unsigned long lease; /* lease time in seconds (host order) */
108 unsigned long max_leases; /* maximum number of leases (including reserved address) */
109 char remaining; /* should the lease file be interpreted as lease time remaining, or
110 * as the time the lease expires */
111 unsigned long auto_time; /* how long should udhcpd wait before writing a config file.
112 * if this is zero, it will only write one on SIGUSR1 */
113 unsigned long decline_time; /* how long an address is reserved if a client returns a
115 unsigned long conflict_time; /* how long an arp conflict offender is leased for */
116 unsigned long offer_time; /* how long an offered address is reserved */
117 unsigned long min_lease; /* minimum lease a client can request*/
120 char *notify_file; /* What to run whenever leases are written */
121 u_int32_t siaddr; /* next server bootp option */
122 char *sname; /* bootp server name */
123 char *boot_file; /* bootp boot file option */
126 extern struct server_config_t server_config;
127 extern struct dhcpOfferedAddr *leases;