+/* vi: set sw=4 ts=4: */
/* dhcpd.h */
+
#ifndef _DHCPD_H
#define _DHCPD_H
-#include <netinet/ip.h>
-#include <netinet/udp.h>
-
-#include "libbb_udhcp.h"
-#include "leases.h"
-#include "version.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"
-/*****************************************************************/
-/* Do not modify below here unless you know what you are doing!! */
-/*****************************************************************/
-
-/* DHCP protocol -- see RFC 2131 */
-#define SERVER_PORT 67
-#define CLIENT_PORT 68
-
-#define DHCP_MAGIC 0x63825363
-
-/* DHCP option codes (partial list) */
-#define DHCP_PADDING 0x00
-#define DHCP_SUBNET 0x01
-#define DHCP_TIME_OFFSET 0x02
-#define DHCP_ROUTER 0x03
-#define DHCP_TIME_SERVER 0x04
-#define DHCP_NAME_SERVER 0x05
-#define DHCP_DNS_SERVER 0x06
-#define DHCP_LOG_SERVER 0x07
-#define DHCP_COOKIE_SERVER 0x08
-#define DHCP_LPR_SERVER 0x09
-#define DHCP_HOST_NAME 0x0c
-#define DHCP_BOOT_SIZE 0x0d
-#define DHCP_DOMAIN_NAME 0x0f
-#define DHCP_SWAP_SERVER 0x10
-#define DHCP_ROOT_PATH 0x11
-#define DHCP_IP_TTL 0x17
-#define DHCP_MTU 0x1a
-#define DHCP_BROADCAST 0x1c
-#define DHCP_NTP_SERVER 0x2a
-#define DHCP_WINS_SERVER 0x2c
-#define DHCP_REQUESTED_IP 0x32
-#define DHCP_LEASE_TIME 0x33
-#define DHCP_OPTION_OVER 0x34
-#define DHCP_MESSAGE_TYPE 0x35
-#define DHCP_SERVER_ID 0x36
-#define DHCP_PARAM_REQ 0x37
-#define DHCP_MESSAGE 0x38
-#define DHCP_MAX_SIZE 0x39
-#define DHCP_T1 0x3a
-#define DHCP_T2 0x3b
-#define DHCP_VENDOR 0x3c
-#define DHCP_CLIENT_ID 0x3d
-
-#define DHCP_END 0xFF
-
-
-#define BOOTREQUEST 1
-#define BOOTREPLY 2
-
-#define ETH_10MB 1
-#define ETH_10MB_LEN 6
-
-#define DHCPDISCOVER 1
-#define DHCPOFFER 2
-#define DHCPREQUEST 3
-#define DHCPDECLINE 4
-#define DHCPACK 5
-#define DHCPNAK 6
-#define DHCPRELEASE 7
-#define DHCPINFORM 8
-
-#define BROADCAST_FLAG 0x8000
-
-#define OPTION_FIELD 0
-#define FILE_FIELD 1
-#define SNAME_FIELD 2
-
-/* miscellaneous defines */
-#define MAC_BCAST_ADDR (uint8_t *) "\xff\xff\xff\xff\xff\xff"
-#define OPT_CODE 0
-#define OPT_LEN 1
-#define OPT_DATA 2
-
struct option_set {
uint8_t *data;
struct option_set *next;
};
struct static_lease {
+ struct static_lease *next;
uint8_t *mac;
uint32_t *ip;
- struct static_lease *next;
};
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 */
+ char remaining; /* should the lease file be interpreted as lease time remaining, or
+ * as the 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 a client can request */
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 */
+ uint32_t siaddr; /* next server bootp option */
+ 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;
+#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
+
extern struct dhcpOfferedAddr *leases;
+/*** leases.h ***/
+
+struct dhcpOfferedAddr {
+ uint8_t chaddr[16];
+ uint32_t yiaddr; /* network order */
+ uint32_t expires; /* host order */
+};
+
+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);
+
+
+/*** 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);
+/* Check to see if a mac has an associated static lease */
+uint32_t getIpByMac(struct static_lease *lease_struct, void *arg);
+/* Check to see if an ip is reserved as a static ip */
+uint32_t reservedIp(struct static_lease *lease_struct, uint32_t ip);
+/* Print out static leases just to check what's going on (debug code) */
+void printStaticLeases(struct static_lease **lease_struct);
+
+
+/*** 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);
+
+
+/*** files.h ***/
+
+void 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, uint8_t code);
+
+
+#if __GNUC_PREREQ(4,1)
+# pragma GCC visibility pop
+#endif
+
#endif
projects / oweals / busybox.git / blobdiff