1 | /* dhcpd.h */
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2 | #ifndef _DHCPD_H
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3 | #define _DHCPD_H
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4 |
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5 | #include <netinet/ip.h>
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6 | #include <netinet/udp.h>
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7 |
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8 | #include "libbb_udhcp.h"
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9 | #include "leases.h"
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10 |
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11 | /************************************/
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12 | /* Defaults _you_ may want to tweak */
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13 | /************************************/
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14 |
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15 | /* the period of time the client is allowed to use that address */
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16 | #define LEASE_TIME (60*60*24*10) /* 10 days of seconds */
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17 | #define LEASES_FILE "/var/lib/misc/udhcpd.leases"
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18 |
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19 | /* where to find the DHCP server configuration file */
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20 | #define DHCPD_CONF_FILE "/etc/udhcpd.conf"
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21 |
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22 | /*****************************************************************/
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23 | /* Do not modify below here unless you know what you are doing!! */
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24 | /*****************************************************************/
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25 |
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26 | /* DHCP protocol -- see RFC 2131 */
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27 | #define SERVER_PORT 67
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28 | #define CLIENT_PORT 68
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29 |
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30 | #define DHCP_MAGIC 0x63825363
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31 |
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32 | /* DHCP option codes (partial list) */
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33 | #define DHCP_PADDING 0x00
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34 | #define DHCP_SUBNET 0x01
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35 | #define DHCP_TIME_OFFSET 0x02
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36 | #define DHCP_ROUTER 0x03
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37 | #define DHCP_TIME_SERVER 0x04
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38 | #define DHCP_NAME_SERVER 0x05
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39 | #define DHCP_DNS_SERVER 0x06
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40 | #define DHCP_LOG_SERVER 0x07
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41 | #define DHCP_COOKIE_SERVER 0x08
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42 | #define DHCP_LPR_SERVER 0x09
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43 | #define DHCP_HOST_NAME 0x0c
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44 | #define DHCP_BOOT_SIZE 0x0d
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45 | #define DHCP_DOMAIN_NAME 0x0f
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46 | #define DHCP_SWAP_SERVER 0x10
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47 | #define DHCP_ROOT_PATH 0x11
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48 | #define DHCP_IP_TTL 0x17
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49 | #define DHCP_MTU 0x1a
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50 | #define DHCP_BROADCAST 0x1c
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51 | #define DHCP_NTP_SERVER 0x2a
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52 | #define DHCP_WINS_SERVER 0x2c
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53 | #define DHCP_REQUESTED_IP 0x32
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54 | #define DHCP_LEASE_TIME 0x33
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55 | #define DHCP_OPTION_OVER 0x34
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56 | #define DHCP_MESSAGE_TYPE 0x35
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57 | #define DHCP_SERVER_ID 0x36
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58 | #define DHCP_PARAM_REQ 0x37
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59 | #define DHCP_MESSAGE 0x38
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60 | #define DHCP_MAX_SIZE 0x39
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61 | #define DHCP_T1 0x3a
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62 | #define DHCP_T2 0x3b
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63 | #define DHCP_VENDOR 0x3c
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64 | #define DHCP_CLIENT_ID 0x3d
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65 | #define DHCP_FQDN 0x51
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66 |
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67 | #define DHCP_END 0xFF
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68 |
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69 |
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70 | #define BOOTREQUEST 1
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71 | #define BOOTREPLY 2
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72 |
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73 | #define ETH_10MB 1
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74 | #define ETH_10MB_LEN 6
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75 |
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76 | #define DHCPDISCOVER 1
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77 | #define DHCPOFFER 2
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78 | #define DHCPREQUEST 3
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79 | #define DHCPDECLINE 4
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80 | #define DHCPACK 5
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81 | #define DHCPNAK 6
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82 | #define DHCPRELEASE 7
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83 | #define DHCPINFORM 8
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84 |
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85 | #define BROADCAST_FLAG 0x8000
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86 |
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87 | #define OPTION_FIELD 0
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88 | #define FILE_FIELD 1
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89 | #define SNAME_FIELD 2
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90 |
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91 | /* miscellaneous defines */
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92 | #define MAC_BCAST_ADDR (uint8_t *) "\xff\xff\xff\xff\xff\xff"
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93 | #define OPT_CODE 0
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94 | #define OPT_LEN 1
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95 | #define OPT_DATA 2
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96 |
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97 | struct option_set {
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98 | uint8_t *data;
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99 | struct option_set *next;
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100 | };
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101 |
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102 | struct static_lease {
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103 | uint8_t *mac;
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104 | uint32_t *ip;
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105 | struct static_lease *next;
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106 | };
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107 |
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108 | struct server_config_t {
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109 | uint32_t server; /* Our IP, in network order */
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110 | uint32_t start; /* Start address of leases, network order */
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111 | uint32_t end; /* End of leases, network order */
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112 | struct option_set *options; /* List of DHCP options loaded from the config file */
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113 | char *interface; /* The name of the interface to use */
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114 | int ifindex; /* Index number of the interface to use */
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115 | uint8_t arp[6]; /* Our arp address */
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116 | unsigned long lease; /* lease time in seconds (host order) */
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117 | unsigned long max_leases; /* maximum number of leases (including reserved address) */
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118 | char remaining; /* should the lease file be interpreted as lease time remaining, or
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119 | * as the time the lease expires */
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120 | unsigned long auto_time; /* how long should udhcpd wait before writing a config file.
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121 | * if this is zero, it will only write one on SIGUSR1 */
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122 | unsigned long decline_time; /* how long an address is reserved if a client returns a
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123 | * decline message */
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124 | unsigned long conflict_time; /* how long an arp conflict offender is leased for */
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125 | unsigned long offer_time; /* how long an offered address is reserved */
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126 | unsigned long min_lease; /* minimum lease a client can request*/
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127 | char *lease_file;
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128 | char *pidfile;
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129 | char *notify_file; /* What to run whenever leases are written */
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130 | uint32_t siaddr; /* next server bootp option */
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131 | char *sname; /* bootp server name */
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132 | char *boot_file; /* bootp boot file option */
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133 | struct static_lease *static_leases; /* List of ip/mac pairs to assign static leases */
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134 | };
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135 |
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136 | extern struct server_config_t server_config;
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137 | extern struct dhcpOfferedAddr *leases;
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138 |
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139 |
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140 | #endif
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