2006-07-02 19:47:05 +00:00
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/* vi: set sw=4 ts=4: */
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2006-05-08 03:20:50 +00:00
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/* dhcpd.h */
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2009-04-09 12:35:13 +00:00
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#ifndef UDHCP_DHCPD_H
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#define UDHCP_DHCPD_H 1
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2008-02-04 13:12:16 +00:00
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2009-04-09 12:35:13 +00:00
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PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
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2008-05-09 17:59:34 +00:00
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2006-05-08 03:20:50 +00:00
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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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2008-02-20 22:29:52 +00:00
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#define LEASES_FILE CONFIG_DHCPD_LEASES_FILE
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2006-05-08 03:20:50 +00:00
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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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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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2007-07-03 15:47:50 +00:00
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struct static_lease *next;
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2009-06-16 10:03:12 +00:00
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uint32_t nip;
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2009-01-01 17:52:09 +00:00
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uint8_t mac[6];
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2006-05-08 03:20:50 +00:00
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};
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struct server_config_t {
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2009-06-16 10:04:23 +00:00
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char *interface; /* interface to use */
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//TODO: ifindex, server_nip, server_mac
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// are obtained from interface name.
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// Instead of querying them *once*, create update_server_network_data_cache()
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// and call it before any usage of these fields.
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// update_server_network_data_cache() must re-query data
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// if more than N seconds have passed after last use.
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int ifindex;
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uint32_t server_nip;
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2008-02-04 13:23:53 +00:00
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#if ENABLE_FEATURE_UDHCP_PORT
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2008-02-04 13:12:16 +00:00
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uint16_t port;
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2008-02-04 13:23:53 +00:00
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#endif
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2009-06-16 10:04:23 +00:00
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uint8_t server_mac[6]; /* our MAC address (used only for ARP probing) */
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struct option_set *options; /* list of DHCP options loaded from the config file */
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2009-06-17 09:54:52 +00:00
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int verbose;
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2007-07-01 17:05:57 +00:00
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/* start,end are in host order: we need to compare start <= ip <= end */
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2009-06-16 10:04:23 +00:00
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uint32_t start_ip; /* start address of leases, in host order */
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uint32_t end_ip; /* end of leases, in host order */
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2007-07-03 15:47:50 +00:00
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uint32_t lease; /* lease time in seconds (host order) */
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uint32_t max_leases; /* maximum number of leases (including reserved address) */
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uint32_t 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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uint32_t decline_time; /* how long an address is reserved if a client returns a
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* decline message */
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uint32_t conflict_time; /* how long an arp conflict offender is leased for */
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uint32_t offer_time; /* how long an offered address is reserved */
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2009-01-01 17:52:09 +00:00
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uint32_t min_lease; /* minimum lease time a client can request */
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2009-06-16 10:04:23 +00:00
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uint32_t siaddr_nip; /* "next server" bootp option */
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2006-05-08 03:20:50 +00:00
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char *lease_file;
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char *pidfile;
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2009-06-16 10:04:23 +00:00
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char *notify_file; /* what to run whenever leases are written */
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2007-07-03 15:47:50 +00:00
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char *sname; /* bootp server name */
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char *boot_file; /* bootp boot file option */
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2006-05-08 03:20:50 +00:00
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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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2007-09-30 17:55:43 +00:00
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#define server_config (*(struct server_config_t*)&bb_common_bufsiz1)
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2008-02-04 13:12:16 +00:00
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/* client_config sits in 2nd half of bb_common_bufsiz1 */
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#if ENABLE_FEATURE_UDHCP_PORT
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#define SERVER_PORT (server_config.port)
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#else
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#define SERVER_PORT 67
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#endif
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2007-09-30 17:55:43 +00:00
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2006-05-08 03:20:50 +00:00
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2006-11-18 19:51:32 +00:00
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/*** leases.h ***/
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2009-01-01 17:52:09 +00:00
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typedef uint32_t leasetime_t;
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typedef int32_t signed_leasetime_t;
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2009-06-17 09:57:09 +00:00
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struct dyn_lease {
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2009-06-16 08:23:01 +00:00
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/* "nip": IP in network order */
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2009-06-16 08:25:35 +00:00
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/* Unix time when lease expires. Kept in memory in host order.
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2009-01-01 17:52:09 +00:00
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* When written to file, converted to network order
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2009-06-16 08:25:35 +00:00
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* and adjusted (current time subtracted) */
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2009-01-01 17:52:09 +00:00
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leasetime_t expires;
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2009-06-17 09:57:09 +00:00
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uint32_t lease_nip;
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/* We use lease_mac[6], since e.g. ARP probing uses
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* only 6 first bytes anyway. We check received dhcp packets
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* that their hlen == 6 and thus chaddr has only 6 significant bytes
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* (dhcp packet has chaddr[16])
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*/
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uint8_t lease_mac[6];
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uint8_t hostname[20];
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uint8_t pad[2];
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/* total size is a multiply of 4 */
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2006-11-18 19:51:32 +00:00
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};
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2009-06-17 09:57:09 +00:00
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extern struct dyn_lease *leases;
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2009-04-01 12:36:09 +00:00
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2009-06-17 09:57:09 +00:00
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struct dyn_lease *add_lease(
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2009-04-01 12:36:09 +00:00
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const uint8_t *chaddr, uint32_t yiaddr,
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leasetime_t leasetime, uint8_t *hostname
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) FAST_FUNC;
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2009-06-17 09:57:09 +00:00
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int lease_expired(struct dyn_lease *lease) FAST_FUNC;
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struct dyn_lease *find_lease_by_chaddr(const uint8_t *chaddr) FAST_FUNC;
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struct dyn_lease *find_lease_by_yiaddr(uint32_t yiaddr) FAST_FUNC;
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2009-06-16 08:20:27 +00:00
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uint32_t find_free_or_expired_address(const uint8_t *chaddr) FAST_FUNC;
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2006-11-18 19:51:32 +00:00
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/*** static_leases.h ***/
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2009-06-16 10:03:12 +00:00
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/* Config file parser will pass static lease info to this function
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* which will add it to a data structure that can be searched later */
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void add_static_lease(struct static_lease **st_lease_pp, uint8_t *mac, uint32_t nip) FAST_FUNC;
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/* Find static lease IP by mac */
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uint32_t get_static_nip_by_mac(struct static_lease *st_lease, void *arg) FAST_FUNC;
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/* Check to see if an IP is reserved as a static IP */
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int is_nip_reserved(struct static_lease *st_lease, uint32_t nip) FAST_FUNC;
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2006-11-18 19:51:32 +00:00
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/* Print out static leases just to check what's going on (debug code) */
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2009-06-16 10:03:12 +00:00
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void print_static_leases(struct static_lease **st_lease_pp) FAST_FUNC;
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2006-11-18 19:51:32 +00:00
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/*** serverpacket.h ***/
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2009-06-17 09:57:09 +00:00
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int send_offer(struct dhcp_packet *oldpacket) FAST_FUNC;
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int send_NAK(struct dhcp_packet *oldpacket) FAST_FUNC;
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int send_ACK(struct dhcp_packet *oldpacket, uint32_t yiaddr) FAST_FUNC;
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int send_inform(struct dhcp_packet *oldpacket) FAST_FUNC;
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2006-11-18 19:51:32 +00:00
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/*** files.h ***/
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2008-09-26 09:34:59 +00:00
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void read_config(const char *file) FAST_FUNC;
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void write_leases(void) FAST_FUNC;
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void read_leases(const char *file) FAST_FUNC;
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struct option_set *find_option(struct option_set *opt_list, uint8_t code) FAST_FUNC;
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2006-11-18 19:51:32 +00:00
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2009-04-09 12:35:13 +00:00
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POP_SAVED_FUNCTION_VISIBILITY
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2008-05-09 17:59:34 +00:00
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2006-05-08 03:20:50 +00:00
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#endif
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