/* vi: set sw=4 ts=4: */
/* dhcpd.h */
+
#ifndef _DHCPD_H
#define _DHCPD_H
+#if __GNUC_PREREQ(4,1)
+# pragma GCC visibility push(hidden)
+#endif
+
/************************************/
/* 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 "/var/lib/misc/udhcpd.leases"
+#define LEASES_FILE CONFIG_DHCPD_LEASES_FILE
/* where to find the DHCP server configuration file */
#define DHCPD_CONF_FILE "/etc/udhcpd.conf"
};
struct static_lease {
- uint8_t *mac;
- uint32_t *ip;
struct static_lease *next;
+ uint32_t ip;
+ uint8_t mac[6];
};
struct server_config_t {
- uint32_t server; /* Our IP, in network order */
- uint32_t start; /* Start address of leases, network order */
- uint32_t end; /* End of leases, network order */
- struct option_set *options; /* List of DHCP options loaded from the config file */
- char *interface; /* The name of the interface to use */
- int ifindex; /* Index number of the interface to use */
- uint8_t arp[6]; /* Our arp address */
- unsigned long lease; /* lease time in seconds (host order) */
- unsigned long max_leases; /* maximum number of leases (including reserved address) */
- char remaining; /* should the lease file be interpreted as lease time remaining, or
- * as the time the lease expires */
- unsigned long auto_time; /* how long should udhcpd wait before writing a config file.
- * if this is zero, it will only write one on SIGUSR1 */
- unsigned long decline_time; /* how long an address is reserved if a client returns a
- * decline message */
- unsigned long conflict_time; /* how long an arp conflict offender is leased for */
- unsigned long offer_time; /* how long an offered address is reserved */
- unsigned long min_lease; /* minimum lease a client can request*/
+ uint32_t server; /* Our IP, in network order */
+#if ENABLE_FEATURE_UDHCP_PORT
+ uint16_t port;
+#endif
+ /* 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 */
+ struct option_set *options; /* List of DHCP options loaded from the config file */
+ char *interface; /* The name of the interface to use */
+ int ifindex; /* Index number of the interface to use */
+ uint8_t arp[6]; /* Our arp address */
+// disabled: dumpleases has no way of knowing this value,
+// and will break if it's off. Now it's on always.
+// char remaining; /* Should the lease time in lease file
+// * be written as lease time remaining, or
+// * as the absolute time the lease expires */
+ uint32_t lease; /* lease time in seconds (host order) */
+ uint32_t max_leases; /* maximum number of leases (including reserved address) */
+ 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; /* next server bootp option */
char *lease_file;
char *pidfile;
- char *notify_file; /* What to run whenever leases are written */
- uint32_t siaddr; /* next server bootp option */
- char *sname; /* bootp server name */
- char *boot_file; /* bootp boot file option */
+ char *notify_file; /* What to run whenever leases are written */
+ 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 */
};
-extern struct server_config_t server_config;
-extern struct dhcpOfferedAddr *leases;
+#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)
+#else
+#define SERVER_PORT 67
+#endif
/*** leases.h ***/
+typedef uint32_t leasetime_t;
+typedef int32_t signed_leasetime_t;
+
struct dhcpOfferedAddr {
uint8_t chaddr[16];
- uint32_t yiaddr; /* network order */
- uint32_t expires; /* host order */
+ /* In network order */
+ uint32_t yiaddr;
+ /* Unix time when lease expires, regardless of value of
+ * server_config.remaining. Kept in memory in host order.
+ * When written to file, converted to network order
+ * and optionally adjusted (current time subtracted)
+ * if server_config.remaining = 1 */
+ leasetime_t expires;
+ uint8_t hostname[20]; /* (size is a multiply of 4) */
};
-struct dhcpOfferedAddr *add_lease(const uint8_t *chaddr, uint32_t yiaddr, unsigned long lease);
-int lease_expired(struct dhcpOfferedAddr *lease);
-struct dhcpOfferedAddr *find_lease_by_chaddr(const uint8_t *chaddr);
-struct dhcpOfferedAddr *find_lease_by_yiaddr(uint32_t yiaddr);
-uint32_t find_address(int check_expired);
+extern struct dhcpOfferedAddr *leases;
+
+struct dhcpOfferedAddr *add_lease(
+ const uint8_t *chaddr, uint32_t yiaddr,
+ leasetime_t leasetime, uint8_t *hostname
+ ) FAST_FUNC;
+int lease_expired(struct dhcpOfferedAddr *lease) FAST_FUNC;
+struct dhcpOfferedAddr *find_lease_by_chaddr(const uint8_t *chaddr) FAST_FUNC;
+struct dhcpOfferedAddr *find_lease_by_yiaddr(uint32_t yiaddr) FAST_FUNC;
+uint32_t find_free_or_expired_address(void) FAST_FUNC;
/*** static_leases.h ***/
/* Config file will pass static lease info to this function which will add it
* to a data structure that can be searched later */
-int addStaticLease(struct static_lease **lease_struct, uint8_t *mac, uint32_t *ip);
+void addStaticLease(struct static_lease **lease_struct, uint8_t *mac, uint32_t ip) FAST_FUNC;
/* Check to see if a mac has an associated static lease */
-uint32_t getIpByMac(struct static_lease *lease_struct, void *arg);
+uint32_t getIpByMac(struct static_lease *lease_struct, void *arg) FAST_FUNC;
/* Check to see if an ip is reserved as a static ip */
-uint32_t reservedIp(struct static_lease *lease_struct, uint32_t ip);
+int reservedIp(struct static_lease *lease_struct, uint32_t ip) FAST_FUNC;
/* Print out static leases just to check what's going on (debug code) */
-void printStaticLeases(struct static_lease **lease_struct);
+void printStaticLeases(struct static_lease **lease_struct) FAST_FUNC;
/*** serverpacket.h ***/
-int sendOffer(struct dhcpMessage *oldpacket);
-int sendNAK(struct dhcpMessage *oldpacket);
-int sendACK(struct dhcpMessage *oldpacket, uint32_t yiaddr);
-int send_inform(struct dhcpMessage *oldpacket);
+int send_offer(struct dhcpMessage *oldpacket) FAST_FUNC;
+int send_NAK(struct dhcpMessage *oldpacket) FAST_FUNC;
+int send_ACK(struct dhcpMessage *oldpacket, uint32_t yiaddr) FAST_FUNC;
+int send_inform(struct dhcpMessage *oldpacket) FAST_FUNC;
/*** files.h ***/
-struct config_keyword {
- const char *keyword;
- int (* const handler)(const char *line, void *var);
- void *var;
- const char *def;
-};
+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;
-int read_config(const char *file);
-void write_leases(void);
-void read_leases(const char *file);
-struct option_set *find_option(struct option_set *opt_list, char code);
+#if __GNUC_PREREQ(4,1)
+# pragma GCC visibility pop
+#endif
#endif
projects / oweals / busybox.git / blobdiff