abf58d6ba5
Hello, Here's a patch for a first attempt at static leases for udhcpd. Included in the tarball are 2 files (static_leases.c, static_leases.h) and a patch against the latest cvs. In the config file you can configure static leases with the following format: static_lease 00:60:08:11:CE:4E 192.168.0.54 static_lease 00:60:08:11:CE:3E 192.168.0.44 Comments/suggestions/improvements are welcome. Wade
141 lines
4.1 KiB
C
141 lines
4.1 KiB
C
/* dhcpd.h */
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#ifndef _DHCPD_H
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#define _DHCPD_H
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#include <netinet/ip.h>
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#include <netinet/udp.h>
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#include "libbb_udhcp.h"
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#include "leases.h"
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#include "version.h"
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/************************************/
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/* Defaults _you_ may want to tweak */
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/************************************/
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/* the period of time the client is allowed to use that address */
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#define LEASE_TIME (60*60*24*10) /* 10 days of seconds */
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#define LEASES_FILE "/var/lib/misc/udhcpd.leases"
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/* where to find the DHCP server configuration file */
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#define DHCPD_CONF_FILE "/etc/udhcpd.conf"
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/*****************************************************************/
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/* Do not modify below here unless you know what you are doing!! */
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/*****************************************************************/
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/* DHCP protocol -- see RFC 2131 */
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#define SERVER_PORT 67
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#define CLIENT_PORT 68
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#define DHCP_MAGIC 0x63825363
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/* DHCP option codes (partial list) */
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#define DHCP_PADDING 0x00
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#define DHCP_SUBNET 0x01
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#define DHCP_TIME_OFFSET 0x02
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#define DHCP_ROUTER 0x03
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#define DHCP_TIME_SERVER 0x04
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#define DHCP_NAME_SERVER 0x05
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#define DHCP_DNS_SERVER 0x06
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#define DHCP_LOG_SERVER 0x07
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#define DHCP_COOKIE_SERVER 0x08
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#define DHCP_LPR_SERVER 0x09
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#define DHCP_HOST_NAME 0x0c
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#define DHCP_BOOT_SIZE 0x0d
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#define DHCP_DOMAIN_NAME 0x0f
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#define DHCP_SWAP_SERVER 0x10
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#define DHCP_ROOT_PATH 0x11
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#define DHCP_IP_TTL 0x17
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#define DHCP_MTU 0x1a
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#define DHCP_BROADCAST 0x1c
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#define DHCP_NTP_SERVER 0x2a
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#define DHCP_WINS_SERVER 0x2c
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#define DHCP_REQUESTED_IP 0x32
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#define DHCP_LEASE_TIME 0x33
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#define DHCP_OPTION_OVER 0x34
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#define DHCP_MESSAGE_TYPE 0x35
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#define DHCP_SERVER_ID 0x36
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#define DHCP_PARAM_REQ 0x37
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#define DHCP_MESSAGE 0x38
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#define DHCP_MAX_SIZE 0x39
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#define DHCP_T1 0x3a
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#define DHCP_T2 0x3b
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#define DHCP_VENDOR 0x3c
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#define DHCP_CLIENT_ID 0x3d
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#define DHCP_END 0xFF
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#define BOOTREQUEST 1
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#define BOOTREPLY 2
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#define ETH_10MB 1
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#define ETH_10MB_LEN 6
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#define DHCPDISCOVER 1
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#define DHCPOFFER 2
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#define DHCPREQUEST 3
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#define DHCPDECLINE 4
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#define DHCPACK 5
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#define DHCPNAK 6
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#define DHCPRELEASE 7
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#define DHCPINFORM 8
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#define BROADCAST_FLAG 0x8000
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#define OPTION_FIELD 0
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#define FILE_FIELD 1
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#define SNAME_FIELD 2
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/* miscellaneous defines */
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#define MAC_BCAST_ADDR (uint8_t *) "\xff\xff\xff\xff\xff\xff"
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#define OPT_CODE 0
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#define OPT_LEN 1
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#define OPT_DATA 2
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struct option_set {
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uint8_t *data;
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struct option_set *next;
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};
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struct static_lease {
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uint8_t *mac;
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uint32_t *ip;
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struct static_lease *next;
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};
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struct server_config_t {
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uint32_t server; /* Our IP, in network order */
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uint32_t start; /* Start address of leases, network order */
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uint32_t end; /* End of leases, network order */
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struct option_set *options; /* List of DHCP options loaded from the config file */
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char *interface; /* The name of the interface to use */
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int ifindex; /* Index number of the interface to use */
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uint8_t arp[6]; /* Our arp address */
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unsigned long lease; /* lease time in seconds (host order) */
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unsigned long max_leases; /* maximum number of leases (including reserved address) */
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char remaining; /* should the lease file be interpreted as lease time remaining, or
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* as the time the lease expires */
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unsigned long auto_time; /* how long should udhcpd wait before writing a config file.
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* if this is zero, it will only write one on SIGUSR1 */
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unsigned long decline_time; /* how long an address is reserved if a client returns a
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* decline message */
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unsigned long conflict_time; /* how long an arp conflict offender is leased for */
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unsigned long offer_time; /* how long an offered address is reserved */
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unsigned long min_lease; /* minimum lease a client can request*/
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char *lease_file;
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char *pidfile;
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char *notify_file; /* What to run whenever leases are written */
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uint32_t siaddr; /* next server bootp option */
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char *sname; /* bootp server name */
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char *boot_file; /* bootp boot file option */
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struct static_lease *static_leases; /* List of ip/mac pairs to assign static leases */
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};
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extern struct server_config_t server_config;
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extern struct dhcpOfferedAddr *leases;
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#endif
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