dhcpd.h

DHCP服务器源码

	OMAPI_OBJECT_PREAMBLE;
	struct interface_info *next;	/* Next interface in list... */
	struct shared_network *shared_network;
				/* Networks connected to this interface. */
	struct hardware hw_address;	/* Its physical address. */
	struct in_addr primary_address;	/* Primary interface address. */

	u_int8_t *circuit_id;		/* Circuit ID associated with this
					   interface. */
	unsigned circuit_id_len;	/* Length of Circuit ID, if there
					   is one. */
	u_int8_t *remote_id;		/* Remote ID associated with this
					   interface (if any). */
	unsigned remote_id_len;		/* Length of Remote ID. */

	char name [IFNAMSIZ];		/* Its name... */
	int index;			/* Its index. */
	int rfdesc;			/* Its read file descriptor. */
	int wfdesc;			/* Its write file descriptor, if
					   different. */
	unsigned char *rbuf;		/* Read buffer, if required. */
	unsigned int rbuf_max;		/* Size of read buffer. */
	size_t rbuf_offset;		/* Current offset into buffer. */
	size_t rbuf_len;		/* Length of data in buffer. */

	struct ifreq *ifp;		/* Pointer to ifreq struct. */
	u_int32_t flags;		/* Control flags... */
#define INTERFACE_REQUESTED 1
#define INTERFACE_AUTOMATIC 2
#define INTERFACE_RUNNING 4

	/* Only used by DHCP client code. */
	struct client_state *client;
# if defined (USE_DLPI_SEND) || defined (USE_DLPI_RECEIVE)
	int dlpi_sap_length;
	struct hardware dlpi_broadcast_addr;
# endif /* DLPI_SEND || DLPI_RECEIVE */
};

struct hardware_link {
	struct hardware_link *next;
	char name [IFNAMSIZ];
	struct hardware address;
};

typedef void (*tvref_t)(void *, void *, const char *, int);
typedef void (*tvunref_t)(void *, const char *, int);
struct timeout {
	struct timeout *next;
	TIME when;
	void (*func) PROTO ((void *));
	void *what;
	tvref_t ref;
	tvunref_t unref;
};

struct protocol {
	struct protocol *next;
	int fd;
	void (*handler) PROTO ((struct protocol *));
	void *local;
};

struct dns_query; /* forward */

struct dns_wakeup {
	struct dns_wakeup *next;	/* Next wakeup in chain. */
	void (*func) PROTO ((struct dns_query *));
};

struct dns_question {
	u_int16_t type;			/* Type of query. */
	u_int16_t class;		/* Class of query. */
	unsigned char data [1];		/* Query data. */
};

struct dns_answer {
	u_int16_t type;			/* Type of answer. */
	u_int16_t class;		/* Class of answer. */
	int count;			/* Number of answers. */
	unsigned char *answers[1];	/* Pointers to answers. */
};

struct dns_query {
	struct dns_query *next;		/* Next query in hash bucket. */
	u_int32_t hash;			/* Hash bucket index. */
	TIME expiry;			/* Query expiry time (zero if not yet
					   answered. */
	u_int16_t id;			/* Query ID (also hash table index) */
	caddr_t waiters;		/* Pointer to list of things waiting
					   on this query. */

	struct dns_question *question;	/* Question, internal format. */
	struct dns_answer *answer;	/* Answer, internal format. */

	unsigned char *query;		/* Query formatted for DNS server. */
	unsigned len;			/* Length of entire query. */
	int sent;			/* The query has been sent. */
	struct dns_wakeup *wakeups;	/* Wakeups to call if this query is
					   answered. */
	struct name_server *next_server;	/* Next server to try. */
	int backoff;			/* Current backoff, in seconds. */
};

struct dns_zone {
	int refcnt;
	TIME timeout;
	char *name;
	struct option_cache *primary;
	struct option_cache *secondary;
	struct auth_key *key;
};

struct icmp_state {
	OMAPI_OBJECT_PREAMBLE;
	int socket;
	void (*icmp_handler) PROTO ((struct iaddr, u_int8_t *, int));
};

#include "ctrace.h"

/* Bitmask of dhcp option codes. */
typedef unsigned char option_mask [16];

/* DHCP Option mask manipulation macros... */
#define OPTION_ZERO(mask)	(memset (mask, 0, 16))
#define OPTION_SET(mask, bit)	(mask [bit >> 8] |= (1 << (bit & 7)))
#define OPTION_CLR(mask, bit)	(mask [bit >> 8] &= ~(1 << (bit & 7)))
#define OPTION_ISSET(mask, bit)	(mask [bit >> 8] & (1 << (bit & 7)))
#define OPTION_ISCLR(mask, bit)	(!OPTION_ISSET (mask, bit))

/* An option occupies its length plus two header bytes (code and
    length) for every 255 bytes that must be stored. */
#define OPTION_SPACE(x)		((x) + 2 * ((x) / 255 + 1))

/* Default path to dhcpd config file. */
#ifdef DEBUG
#undef _PATH_DHCPD_CONF
#define _PATH_DHCPD_CONF	"dhcpd.conf"
#undef _PATH_DHCPD_DB
#define _PATH_DHCPD_DB		"dhcpd.leases"
#undef _PATH_DHCPD_PID
#define _PATH_DHCPD_PID		"dhcpd.pid"
#else
#ifndef _PATH_DHCPD_CONF
#define _PATH_DHCPD_CONF	"/etc/dhcpd.conf"
#endif

#ifndef _PATH_DHCPD_DB
#define _PATH_DHCPD_DB		"/etc/dhcpd.leases"
#endif

#ifndef _PATH_DHCPD_PID
#define _PATH_DHCPD_PID		"/var/run/dhcpd.pid"
#endif
#endif

#ifndef _PATH_DHCLIENT_CONF
#define _PATH_DHCLIENT_CONF	"/etc/dhclient.conf"
#endif

#ifndef _PATH_DHCLIENT_SCRIPT
#define _PATH_DHCLIENT_SCRIPT	"/sbin/dhclient-script"
#endif

#ifndef _PATH_DHCLIENT_PID
#define _PATH_DHCLIENT_PID	"/var/run/dhclient.pid"
#endif

#ifndef _PATH_DHCLIENT_DB
#define _PATH_DHCLIENT_DB	"/etc/dhclient.leases"
#endif

#ifndef _PATH_RESOLV_CONF
#define _PATH_RESOLV_CONF	"/etc/resolv.conf"
#endif

#ifndef _PATH_DHCRELAY_PID
#define _PATH_DHCRELAY_PID	"/var/run/dhcrelay.pid"
#endif

#ifndef DHCPD_LOG_FACILITY
#define DHCPD_LOG_FACILITY	LOG_DAEMON
#endif

#define MAX_TIME 0x7fffffff
#define MIN_TIME 0

/* External definitions... */

HASH_FUNCTIONS_DECL (group, const char *, struct group_object, group_hash_t)
HASH_FUNCTIONS_DECL (universe, const char *, struct universe, universe_hash_t)
HASH_FUNCTIONS_DECL (option, const char *, struct option, option_hash_t)
HASH_FUNCTIONS_DECL (dns_zone, const char *, struct dns_zone, dns_zone_hash_t)
HASH_FUNCTIONS_DECL (lease, const unsigned char *, struct lease, lease_hash_t)
HASH_FUNCTIONS_DECL (host, const unsigned char *, struct host_decl, host_hash_t)
HASH_FUNCTIONS_DECL (class, const char *, struct class, class_hash_t)

/* options.c */

extern struct option *vendor_cfg_option;
int parse_options PROTO ((struct packet *));
int parse_option_buffer PROTO ((struct option_state *, const unsigned char *,
				unsigned, struct universe *));
struct universe *find_option_universe (struct option *, const char *);
int parse_encapsulated_suboptions (struct option_state *, struct option *,
				   const unsigned char *, unsigned,
				   struct universe *, const char *);
int cons_options PROTO ((struct packet *, struct dhcp_packet *, struct lease *,
			 struct client_state *,
			 int, struct option_state *, struct option_state *,
			 struct binding_scope **,
			 int, int, int, struct data_string *, const char *));
int fqdn_universe_decode (struct option_state *,
			  const unsigned char *, unsigned, struct universe *);
int store_options PROTO ((unsigned char *, unsigned, struct packet *,
			  struct lease *, struct client_state *,
			  struct option_state *,
			  struct option_state *, struct binding_scope **,
			  unsigned *, int, unsigned, unsigned,
			  int, const char *));
const char *pretty_print_option PROTO ((struct option *, const unsigned char *,
					unsigned, int, int));
int get_option (struct data_string *, struct universe *,
		struct packet *, struct lease *, struct client_state *,
		struct option_state *, struct option_state *,
		struct option_state *, struct binding_scope **, unsigned,
		const char *, int);
void set_option (struct universe *, struct option_state *,
		 struct option_cache *, enum statement_op);
struct option_cache *lookup_option PROTO ((struct universe *,
					   struct option_state *, unsigned));
struct option_cache *lookup_hashed_option PROTO ((struct universe *,
						  struct option_state *,
						  unsigned));
int save_option_buffer (struct universe *, struct option_state *,
			struct buffer *, unsigned char *, unsigned,
			struct option *, int);
void save_option PROTO ((struct universe *,
			 struct option_state *, struct option_cache *));
void save_hashed_option PROTO ((struct universe *,
				struct option_state *, struct option_cache *));
void delete_option PROTO ((struct universe *, struct option_state *, int));
void delete_hashed_option PROTO ((struct universe *,
				  struct option_state *, int));
int option_cache_dereference PROTO ((struct option_cache **,
				     const char *, int));
int hashed_option_state_dereference PROTO ((struct universe *,
					    struct option_state *,
					    const char *, int));
int store_option PROTO ((struct data_string *,
			 struct universe *, struct packet *, struct lease *,
			 struct client_state *,
			 struct option_state *, struct option_state *,
			 struct binding_scope **, struct option_cache *));
int option_space_encapsulate PROTO ((struct data_string *,
				     struct packet *, struct lease *,
				     struct client_state *,
				     struct option_state *,
				     struct option_state *,
				     struct binding_scope **,
				     struct data_string *));
int hashed_option_space_encapsulate PROTO ((struct data_string *,
					    struct packet *, struct lease *,
					    struct client_state *,
					    struct option_state *,
					    struct option_state *,
					    struct binding_scope **,
					    struct universe *));
int nwip_option_space_encapsulate PROTO ((struct data_string *,
					  struct packet *, struct lease *,
					  struct client_state *,
					  struct option_state *,
					  struct option_state *,
					  struct binding_scope **,
					  struct universe *));
int fqdn_option_space_encapsulate (struct data_string *,
				   struct packet *, struct lease *,
				   struct client_state *,
				   struct option_state *,
				   struct option_state *,
				   struct binding_scope **,
				   struct universe *);
void suboption_foreach (struct packet *, struct lease *, struct client_state *,
			struct option_state *, struct option_state *,
			struct binding_scope **, struct universe *, void *,
			void (*) (struct option_cache *, struct packet *,
				  struct lease *, struct client_state *,
				  struct option_state *, struct option_state *,
				  struct binding_scope **,
				  struct universe *, void *),
			struct option_cache *, const char *);
void option_space_foreach (struct packet *, struct lease *,
			   struct client_state *,
			   struct option_state *,
			   struct option_state *,
			   struct binding_scope **,
			   struct universe *, void *,
			   void (*) (struct option_cache *,
				     struct packet *,
				     struct lease *, struct client_state *,
				     struct option_state *,
				     struct option_state *,
				     struct binding_scope **,
				     struct universe *, void *));
void hashed_option_space_foreach (struct packet *, struct lease *,
				  struct client_state *,
				  struct option_state *,
				  struct option_state *,
				  struct binding_scope **,
				  struct universe *, void *,
				  void (*) (struct option_cache *,
					    struct packet *,
					    struct lease *,
					    struct client_state *,
					    struct option_state *,
					    struct option_state *,
					    struct binding_scope **,
					    struct universe *, void *));
int linked_option_get PROTO ((struct data_string *, struct universe *,
			      struct packet *, struct lease *,
			      struct client_state *,
			      struct option_state *, struct option_state *,
			      struct option_state *, struct binding_scope **,
			      unsigned));
int linked_option_state_dereference PROTO ((struct universe *,
					    struct option_state *,
					    const char *, int));
void save_linked_option (struct universe *, struct option_state *,
			 struct option_cache *);
void linked_option_space_foreach (struct packet *, struct lease *,
				  struct client_state *,
				  struct option_state *,
				  struct option_state *,
				  struct binding_scope **,
				  struct universe *, void *,
				  void (*) (struct option_cache *,
					    struct packet *,
					    struct lease *,
					    struct client_state *,
					    struct option_state *,
					    struct option_state *,
					    struct binding_scope **,
					    struct universe *, void *));
int linked_option_space_encapsulate (struct data_string *, struct packet *,
				     struct lease *, struct client_state *,
				     struct option_state *,
				     struct option_state *,
				     struct binding_scope **,
				     struct universe *);
void delete_linked_option (struct universe *, struct option_state *, int);
struct option_cache *lookup_linked_option (struct universe *,
					   struct option_state *, unsigned);
void do_packet PROTO ((struct interface_info *,
		       struct dhcp_packet *, unsigned,
		       unsigned int, struct iaddr, struct hardware *));

/* dhcpd.c */
extern TIME cur_time;

int ddns_update_style;

extern const char *path_dhcpd_conf;
extern const char *path_dhcpd_db;
extern const char *path_dhcpd_pid;

extern int dhcp_max_agent_option_packet_length;

int main PROTO ((int, char **, char **));
void postconf_initialization (int);
void postdb_startup (void);
void cleanup PROTO ((void));
void lease_pinged PROTO ((struct iaddr, u_int8_t *, int));
void lease_ping_timeout PROTO ((void *));
int dhcpd_interface_setup_hook (struct interface_info *ip, struct iaddr *ia);
enum dhcp_shutdown_state shutdown_state;
isc_result_t dhcp_io_shutdown (omapi_object_t *, void *);
isc_result_t dhcp_set_control_state (control_object_state_t oldstate,
				     control_object_state_t newstate);