1/* dhcpd.h */
2#ifndef _DHCPD_H
3#define _DHCPD_H
4
5#include <netinet/ip.h>
6#include <netinet/udp.h>
7
8#include "libbb_udhcp.h"
9#include "leases.h"
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
18/* where to find the DHCP server configuration file */
19#define DHCPD_CONF_FILE         "/etc/udhcpd.conf"
20
21/*****************************************************************/
22/* Do not modify below here unless you know what you are doing!! */
23/*****************************************************************/
24
25/* DHCP protocol -- see RFC 2131 */
26#define SERVER_PORT		67
27#define CLIENT_PORT		68
28
29#define DHCP_MAGIC		0x63825363
30
31/* DHCP option codes (partial list) */
32#define DHCP_PADDING		0x00
33#define DHCP_SUBNET		0x01
34#define DHCP_TIME_OFFSET	0x02
35#define DHCP_ROUTER		0x03
36#define DHCP_TIME_SERVER	0x04
37#define DHCP_NAME_SERVER	0x05
38#define DHCP_DNS_SERVER		0x06
39#define DHCP_LOG_SERVER		0x07
40#define DHCP_COOKIE_SERVER	0x08
41#define DHCP_LPR_SERVER		0x09
42#define DHCP_HOST_NAME		0x0c
43#define DHCP_BOOT_SIZE		0x0d
44#define DHCP_DOMAIN_NAME	0x0f
45#define DHCP_SWAP_SERVER	0x10
46#define DHCP_ROOT_PATH		0x11
47#define DHCP_IP_TTL		0x17
48#define DHCP_MTU		0x1a
49#define DHCP_BROADCAST		0x1c
50#define DHCP_NTP_SERVER		0x2a
51#define DHCP_WINS_SERVER	0x2c
52#define DHCP_REQUESTED_IP	0x32
53#define DHCP_LEASE_TIME		0x33
54#define DHCP_OPTION_OVER	0x34
55#define DHCP_MESSAGE_TYPE	0x35
56#define DHCP_SERVER_ID		0x36
57#define DHCP_PARAM_REQ		0x37
58#define DHCP_MESSAGE		0x38
59#define DHCP_MAX_SIZE		0x39
60#define DHCP_T1			0x3a
61#define DHCP_T2			0x3b
62#define DHCP_VENDOR		0x3c
63#define DHCP_CLIENT_ID		0x3d
64
65#define DHCP_END		0xFF
66
67
68#define BOOTREQUEST		1
69#define BOOTREPLY		2
70
71#define ETH_10MB		1
72#define ETH_10MB_LEN		6
73
74#define DHCPDISCOVER		1
75#define DHCPOFFER		2
76#define DHCPREQUEST		3
77#define DHCPDECLINE		4
78#define DHCPACK			5
79#define DHCPNAK			6
80#define DHCPRELEASE		7
81#define DHCPINFORM		8
82
83#define BROADCAST_FLAG		0x8000
84
85#define OPTION_FIELD		0
86#define FILE_FIELD		1
87#define SNAME_FIELD		2
88
89/* miscellaneous defines */
90#define MAC_BCAST_ADDR		(unsigned char *) "\xff\xff\xff\xff\xff\xff"
91#define OPT_CODE 0
92#define OPT_LEN 1
93#define OPT_DATA 2
94
95#define MAX_TOKEN_SIZE    100
96#define MAX_RESERVED_IP    64   /* Foxconn modified pling 10/04/2007, 30->64 */
97#define MAX_RESERVED_MAC   64   /* Foxconn modified pling 10/04/2007, 30->64 */
98
99struct option_set {
100	unsigned char *data;
101	struct option_set *next;
102};
103
104struct server_config_t {
105	u_int32_t server;		/* Our IP, in network order */
106	u_int32_t start;		/* Start address of leases, network order */
107	u_int32_t end;			/* End of leases, network order */
108	struct option_set *options;	/* List of DHCP options loaded from the config file */
109	char *interface;		/* The name of the interface to use */
110	int ifindex;			/* Index number of the interface to use */
111	unsigned char arp[6];		/* Our arp address */
112	unsigned long lease;		/* lease time in seconds (host order) */
113	unsigned long max_leases; 	/* maximum number of leases (including reserved address) */
114	char remaining; 		/* should the lease file be interpreted as lease time remaining, or
115			 		 * as the time the lease expires */
116	unsigned long auto_time; 	/* how long should udhcpd wait before writing a config file.
117					 * if this is zero, it will only write one on SIGUSR1 */
118	unsigned long decline_time; 	/* how long an address is reserved if a client returns a
119				    	 * decline message */
120	unsigned long conflict_time; 	/* how long an arp conflict offender is leased for */
121	unsigned long offer_time; 	/* how long an offered address is reserved */
122	unsigned long min_lease; 	/* minimum lease a client can request*/
123	char *lease_file;
124	char *pidfile;
125	char *notify_file;		/* What to run whenever leases are written */
126	u_int32_t siaddr;		/* next server bootp option */
127	char *sname;			/* bootp server name */
128	char *boot_file;		/* bootp boot file option */
129};
130
131extern struct server_config_t server_config;
132extern struct dhcpOfferedAddr *leases;
133extern char resrvMacAddr[MAX_RESERVED_MAC][MAX_TOKEN_SIZE];
134extern char resrvIpAddr[MAX_RESERVED_IP][MAX_TOKEN_SIZE];
135extern int num_of_reservedIP;
136extern int getReservedAddr(char reservedMacAddr[][MAX_TOKEN_SIZE], char reservedIpAddr[][MAX_TOKEN_SIZE]);
137extern int check_reserved_ip(u_int32_t req_ip, u_int8_t *chaddr);
138extern u_int32_t find_reserved_ip(u_int8_t *chaddr);
139
140#endif
141