/* vi: set sw=4 ts=4: */
-/* dhcpd.h */
+/*
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
#ifndef UDHCP_DHCPD_H
#define UDHCP_DHCPD_H 1
PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
-/************************************/
-/* Defaults _you_ may want to tweak */
-/************************************/
-
-/* the period of time the client is allowed to use that address */
-#define LEASE_TIME (60*60*24*10) /* 10 days of seconds */
-#define LEASES_FILE CONFIG_DHCPD_LEASES_FILE
-
-/* where to find the DHCP server configuration file */
+/* Defaults you may want to tweak */
+/* Default max_lease_sec */
+#define DEFAULT_LEASE_TIME (60*60*24 * 10)
+#define LEASES_FILE CONFIG_DHCPD_LEASES_FILE
+/* Where to find the DHCP server configuration file */
#define DHCPD_CONF_FILE "/etc/udhcpd.conf"
-struct option_set {
- uint8_t *data;
- struct option_set *next;
-};
struct static_lease {
struct static_lease *next;
#endif
uint8_t server_mac[6]; /* our MAC address (used only for ARP probing) */
struct option_set *options; /* list of DHCP options loaded from the config file */
- int verbose;
/* start,end are in host order: we need to compare start <= ip <= end */
uint32_t start_ip; /* start address of leases, in host order */
uint32_t end_ip; /* end of leases, in host order */
- uint32_t lease; /* lease time in seconds (host order) */
- uint32_t max_leases; /* maximum number of leases (including reserved address) */
+ uint32_t max_lease_sec; /* maximum lease time (host order) */
+ uint32_t min_lease_sec; /* minimum lease time a client can request */
+ uint32_t max_leases; /* maximum number of leases (including reserved addresses) */
uint32_t auto_time; /* how long should udhcpd wait before writing a config file.
* if this is zero, it will only write one on SIGUSR1 */
uint32_t decline_time; /* how long an address is reserved if a client returns a
* decline message */
uint32_t conflict_time; /* how long an arp conflict offender is leased for */
uint32_t offer_time; /* how long an offered address is reserved */
- uint32_t min_lease; /* minimum lease time a client can request */
uint32_t siaddr_nip; /* "next server" bootp option */
char *lease_file;
char *pidfile;
char *sname; /* bootp server name */
char *boot_file; /* bootp boot file option */
struct static_lease *static_leases; /* List of ip/mac pairs to assign static leases */
-};
+} FIX_ALIASING;
#define server_config (*(struct server_config_t*)&bb_common_bufsiz1)
/* client_config sits in 2nd half of bb_common_bufsiz1 */
#if ENABLE_FEATURE_UDHCP_PORT
-#define SERVER_PORT (server_config.port)
+#define SERVER_PORT (server_config.port)
+#define SERVER_PORT6 (server_config.port)
#else
-#define SERVER_PORT 67
+#define SERVER_PORT 67
+#define SERVER_PORT6 547
#endif
-/*** leases.h ***/
-
typedef uint32_t leasetime_t;
typedef int32_t signed_leasetime_t;
struct dyn_lease {
- /* "nip": IP in network order */
/* Unix time when lease expires. Kept in memory in host order.
* When written to file, converted to network order
* and adjusted (current time subtracted) */
leasetime_t expires;
+ /* "nip": IP in network order */
uint32_t lease_nip;
/* We use lease_mac[6], since e.g. ARP probing uses
* only 6 first bytes anyway. We check received dhcp packets
* that their hlen == 6 and thus chaddr has only 6 significant bytes
- * (dhcp packet has chaddr[16])
+ * (dhcp packet has chaddr[16], not [6])
*/
uint8_t lease_mac[6];
- uint8_t hostname[20];
+ char hostname[20];
uint8_t pad[2];
/* total size is a multiply of 4 */
-};
+} PACKED;
-extern struct dyn_lease *leases;
+extern struct dyn_lease *g_leases;
struct dyn_lease *add_lease(
const uint8_t *chaddr, uint32_t yiaddr,
- leasetime_t leasetime, uint8_t *hostname
+ leasetime_t leasetime,
+ const char *hostname, int hostname_len
) FAST_FUNC;
-int lease_expired(struct dyn_lease *lease) FAST_FUNC;
-struct dyn_lease *find_lease_by_chaddr(const uint8_t *chaddr) FAST_FUNC;
-struct dyn_lease *find_lease_by_yiaddr(uint32_t yiaddr) FAST_FUNC;
-uint32_t find_free_or_expired_address(const uint8_t *chaddr) FAST_FUNC;
+int is_expired_lease(struct dyn_lease *lease) FAST_FUNC;
+struct dyn_lease *find_lease_by_mac(const uint8_t *mac) FAST_FUNC;
+struct dyn_lease *find_lease_by_nip(uint32_t nip) FAST_FUNC;
+uint32_t find_free_or_expired_nip(const uint8_t *safe_mac) FAST_FUNC;
-/*** static_leases.h ***/
-
/* Config file parser will pass static lease info to this function
* which will add it to a data structure that can be searched later */
void add_static_lease(struct static_lease **st_lease_pp, uint8_t *mac, uint32_t nip) FAST_FUNC;
/* Check to see if an IP is reserved as a static IP */
int is_nip_reserved(struct static_lease *st_lease, uint32_t nip) FAST_FUNC;
/* Print out static leases just to check what's going on (debug code) */
-void print_static_leases(struct static_lease **st_lease_pp) FAST_FUNC;
-
-
-/*** serverpacket.h ***/
-
-int send_offer(struct dhcp_packet *oldpacket) FAST_FUNC;
-int send_NAK(struct dhcp_packet *oldpacket) FAST_FUNC;
-int send_ACK(struct dhcp_packet *oldpacket, uint32_t yiaddr) FAST_FUNC;
-int send_inform(struct dhcp_packet *oldpacket) FAST_FUNC;
-
+#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 2
+void log_static_leases(struct static_lease **st_lease_pp) FAST_FUNC;
+#else
+# define log_static_leases(st_lease_pp) ((void)0)
+#endif
-/*** files.h ***/
void read_config(const char *file) FAST_FUNC;
void write_leases(void) FAST_FUNC;
void read_leases(const char *file) FAST_FUNC;
-struct option_set *find_option(struct option_set *opt_list, uint8_t code) FAST_FUNC;
POP_SAVED_FUNCTION_VISIBILITY