this is where dhclient will start surgery

1 files changed, 1053 insertions, 0 deletions

diff --git a/sbin/dhclient/dhcpd.h b/sbin/dhclient/dhcpd.h
new file mode 100644
index 00000000000..9936965615b
--- /dev/null
+++ b/sbin/dhclient/dhcpd.h
@@ -0,0 +1,1053 @@
+/* dhcpd.h
+
+   Definitions for dhcpd... */
+
+/*
+ * Copyright (c) 1995, 1996, 1997, 1998, 1999
+ * The Internet Software Consortium.    All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of The Internet Software Consortium nor the names
+ *    of its contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
+ * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This software has been written for the Internet Software Consortium
+ * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
+ * Enterprises.  To learn more about the Internet Software Consortium,
+ * see ``http://www.vix.com/isc''.  To learn more about Vixie
+ * Enterprises, see ``http://www.vix.com''.
+ */
+
+#ifndef __CYGWIN32__
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#else
+#define fd_set cygwin_fd_set
+#include <sys/types.h>
+#endif
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <ctype.h>
+#include <time.h>
+
+#include "cdefs.h"
+#include "osdep.h"
+#include "dhcp.h"
+#include "tree.h"
+#include "hash.h"
+#include "inet.h"
+#include "sysconf.h"
+
+struct option_data {
+	int len;
+	u_int8_t *data;
+};
+
+struct string_list {
+	struct string_list *next;
+	char *string;
+};
+
+/* A name server, from /etc/resolv.conf. */
+struct name_server {
+	struct name_server *next;
+	struct sockaddr_in addr;
+	TIME rcdate;
+};
+
+/* A domain search list element. */
+struct domain_search_list {
+	struct domain_search_list *next;
+	char *domain;
+	TIME rcdate;
+};
+
+/* A dhcp packet and the pointers to its option values. */
+struct packet {
+	struct dhcp_packet *raw;
+	int packet_length;
+	int packet_type;
+	int options_valid;
+	int client_port;
+	struct iaddr client_addr;
+	struct interface_info *interface;	/* Interface on which packet
+						   was received. */
+	struct hardware *haddr;		/* Physical link address
+					   of local sender (maybe gateway). */
+	struct shared_network *shared_network;
+	struct option_data options [256];
+	int got_requested_address;	/* True if client sent the
+					   dhcp-requested-address option. */
+};
+
+struct hardware {
+	u_int8_t htype;
+	u_int8_t hlen;
+	u_int8_t haddr [16];
+};
+
+/* A dhcp lease declaration structure. */
+struct lease {
+	struct lease *next;
+	struct lease *prev;
+	struct lease *n_uid, *n_hw;
+	struct lease *waitq_next;
+
+	struct iaddr ip_addr;
+	TIME starts, ends, timestamp;
+	unsigned char *uid;
+	int uid_len;
+	int uid_max;
+	unsigned char uid_buf [32];
+	char *hostname;
+	char *client_hostname;
+	struct host_decl *host;
+	struct subnet *subnet;
+	struct shared_network *shared_network;
+	struct hardware hardware_addr;
+
+	int flags;
+#       define STATIC_LEASE		1
+#       define BOOTP_LEASE		2
+#	define DYNAMIC_BOOTP_OK		4
+#	define PERSISTENT_FLAGS		(DYNAMIC_BOOTP_OK)
+#	define EPHEMERAL_FLAGS		(BOOTP_LEASE)
+#	define MS_NULL_TERMINATION	8
+#	define ABANDONED_LEASE		16
+
+	struct lease_state *state;
+	u_int8_t releasing;
+};
+
+struct lease_state {
+	struct lease_state *next;
+
+	struct interface_info *ip;
+
+	TIME offered_expiry;
+
+	struct tree_cache *options [256];
+	u_int32_t expiry, renewal, rebind;
+	char filename [DHCP_FILE_LEN];
+	char *server_name;
+
+	struct iaddr from;
+
+	int max_message_size;
+	u_int8_t *prl;
+	int prl_len;
+	int got_requested_address;	/* True if client sent the
+					   dhcp-requested-address option. */
+	int got_server_identifier;	/* True if client sent the
+					   dhcp-server-identifier option. */
+	struct shared_network *shared_network;	/* Shared network of interface
+						   on which request arrived. */
+
+	u_int32_t xid;
+	u_int16_t secs;
+	u_int16_t bootp_flags;
+	struct in_addr ciaddr;
+	struct in_addr giaddr;
+	u_int8_t hops;
+	u_int8_t offer;
+};
+
+#define	ROOT_GROUP	0
+#define HOST_DECL	1
+#define SHARED_NET_DECL	2
+#define SUBNET_DECL	3
+#define CLASS_DECL	4
+#define	GROUP_DECL	5
+
+/* Possible modes in which discover_interfaces can run. */
+
+#define DISCOVER_RUNNING	0
+#define DISCOVER_SERVER		1
+#define DISCOVER_UNCONFIGURED	2
+#define DISCOVER_RELAY		3
+#define DISCOVER_REQUESTED	4
+
+/* Group of declarations that share common parameters. */
+struct group {
+	struct group *next;
+
+	struct subnet *subnet;
+	struct shared_network *shared_network;
+
+	TIME default_lease_time;
+	TIME max_lease_time;
+	TIME bootp_lease_cutoff;
+	TIME bootp_lease_length;
+
+	char *filename;
+	char *server_name;	
+	struct iaddr next_server;
+
+	int boot_unknown_clients;
+	int dynamic_bootp;
+	int allow_bootp;
+	int allow_booting;
+	int one_lease_per_client;
+	int get_lease_hostnames;
+	int use_host_decl_names;
+	int use_lease_addr_for_default_route;
+	int authoritative;
+	int always_reply_rfc1048;
+
+	struct tree_cache *options [256];
+};
+
+/* A dhcp host declaration structure. */
+struct host_decl {
+	struct host_decl *n_ipaddr;
+	char *name;
+	struct hardware interface;
+	struct tree_cache *fixed_addr;
+	struct group *group;
+};
+
+struct shared_network {
+	struct shared_network *next;
+	char *name;
+	struct subnet *subnets;
+	struct interface_info *interface;
+	struct lease *leases;
+	struct lease *insertion_point;
+	struct lease *last_lease;
+
+	struct group *group;
+};
+
+struct subnet {
+	struct subnet *next_subnet;
+	struct subnet *next_sibling;
+	struct shared_network *shared_network;
+	struct interface_info *interface;
+	struct iaddr interface_address;
+	struct iaddr net;
+	struct iaddr netmask;
+
+	struct group *group;
+};
+
+struct class {
+	char *name;
+
+	struct group *group;
+};
+
+/* DHCP client lease structure... */
+struct client_lease {
+	struct client_lease *next;		      /* Next lease in list. */
+	TIME expiry, renewal, rebind;			  /* Lease timeouts. */
+	struct iaddr address;			    /* Address being leased. */
+	char *server_name;			     /* Name of boot server. */
+	char *filename;		     /* Name of file we're supposed to boot. */
+	struct string_list *medium;			  /* Network medium. */
+
+	unsigned int is_static : 1;    /* If set, lease is from config file. */
+	unsigned int is_bootp: 1;   /* If set, lease was aquired with BOOTP. */
+
+	struct option_data options [256];    /* Options supplied with lease. */
+};
+
+/* Possible states in which the client can be. */
+enum dhcp_state {
+	S_REBOOTING,
+	S_INIT,
+	S_SELECTING,
+	S_REQUESTING, 
+	S_BOUND,
+	S_RENEWING,
+	S_REBINDING
+};
+
+/* Configuration information from the config file... */
+struct client_config {
+	struct option_data defaults [256]; /* Default values for options. */
+	enum {
+		ACTION_DEFAULT,		/* Use server value if present,
+					   otherwise default. */
+		ACTION_SUPERSEDE,	/* Always use default. */
+		ACTION_PREPEND,		/* Prepend default to server. */
+		ACTION_APPEND		/* Append default to server. */
+	} default_actions [256];
+
+	struct option_data send_options [256]; /* Send these to server. */
+	u_int8_t required_options [256]; /* Options server must supply. */
+	u_int8_t requested_options [256]; /* Options to request from server. */
+	int requested_option_count;	/* Number of requested options. */
+	TIME timeout;			/* Start to panic if we don't get a
+					   lease in this time period when
+					   SELECTING. */
+	TIME initial_interval;		/* All exponential backoff intervals
+					   start here. */
+	TIME retry_interval;		/* If the protocol failed to produce
+					   an address before the timeout,
+					   try the protocol again after this
+					   many seconds. */
+	TIME select_interval;		/* Wait this many seconds from the
+					   first DHCPDISCOVER before
+					   picking an offered lease. */
+	TIME reboot_timeout;		/* When in INIT-REBOOT, wait this
+					   long before giving up and going
+					   to INIT. */
+	TIME backoff_cutoff;		/* When doing exponential backoff,
+					   never back off to an interval
+					   longer than this amount. */
+	struct string_list *media;	/* Possible network media values. */
+	char *script_name;		/* Name of config script. */
+	enum { IGNORE, ACCEPT, PREFER } bootp_policy;
+					/* Ignore, accept or prefer BOOTP
+					   responses. */
+	struct string_list *medium;	/* Current network medium. */
+
+	struct iaddrlist *reject_list;	/* Servers to reject. */
+};
+
+/* Per-interface state used in the dhcp client... */
+struct client_state {
+	struct client_lease *active;		  /* Currently active lease. */
+	struct client_lease *new;			       /* New lease. */
+	struct client_lease *offered_leases;	    /* Leases offered to us. */
+	struct client_lease *leases;		/* Leases we currently hold. */
+	struct client_lease *alias;			     /* Alias lease. */
+
+	enum dhcp_state state;		/* Current state for this interface. */
+	struct iaddr destination;		    /* Where to send packet. */
+	u_int32_t xid;					  /* Transaction ID. */
+	u_int16_t secs;			    /* secs value from DHCPDISCOVER. */
+	TIME first_sending;			/* When was first copy sent? */
+	TIME interval;		      /* What's the current resend interval? */
+	struct string_list *medium;		   /* Last media type tried. */
+
+	struct dhcp_packet packet;		    /* Outgoing DHCP packet. */
+	int packet_length;	       /* Actual length of generated packet. */
+
+	struct iaddr requested_address;	    /* Address we would like to get. */
+
+	struct client_config *config;	    /* Information from config file. */
+
+	char **scriptEnv;  /* Client script env */
+	int scriptEnvsize; /* size of the env table */
+
+	struct string_list *env;	       /* Client script environment. */
+	int envc;			/* Number of entries in environment. */
+};
+
+/* Information about each network interface. */
+
+struct interface_info {
+	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. */
+	char name [IFNAMSIZ];		/* Its name... */
+	int rfdesc;			/* Its read file descriptor. */
+	int wfdesc;			/* Its write file descriptor, if
+					   different. */
+	unsigned char *rbuf;		/* Read buffer, if required. */
+	size_t 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
+
+	/* Only used by DHCP client code. */
+	struct client_state *client;
+	int noifmedia;
+	int errors;
+	int dead;
+	u_int16_t	index;
+};
+
+struct hardware_link {
+	struct hardware_link *next;
+	char name [IFNAMSIZ];
+	struct hardware address;
+};
+
+struct timeout {
+	struct timeout *next;
+	TIME when;
+	void (*func) PROTO ((void *));
+	void *what;
+};
+
+struct protocol {
+	struct protocol *next;
+	int fd;
+	void (*handler) PROTO ((struct protocol *));
+	void *local;
+};
+
+/* 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"
+#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_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... */
+
+/* options.c */
+
+void parse_options PROTO ((struct packet *));
+void parse_option_buffer PROTO ((struct packet *, unsigned char *, int));
+int cons_options PROTO ((struct packet *, struct dhcp_packet *, int,
+			 struct tree_cache **, int, int, int,
+			 u_int8_t *, int));
+int store_options PROTO ((unsigned char *, int, struct tree_cache **,
+			   unsigned char *, int, int, int, int));
+char *pretty_print_option PROTO ((unsigned int,
+				  unsigned char *, int, int, int));
+void do_packet PROTO ((struct interface_info *,
+		       struct dhcp_packet *, int,
+		       unsigned int, struct iaddr, struct hardware *));
+
+/* errwarn.c */
+extern int warnings_occurred;
+void error (char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
+int warn (char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
+int note (char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
+int debug (char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
+int parse_warn (char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
+
+/* dhcpd.c */
+extern TIME cur_time;
+extern struct group root_group;
+
+extern u_int16_t local_port;
+extern u_int16_t remote_port;
+extern int log_priority;
+extern int log_perror;
+
+extern char *path_dhcpd_conf;
+extern char *path_dhcpd_db;
+extern char *path_dhcpd_pid;
+
+int main PROTO ((int, char **));
+void cleanup PROTO ((void));
+void lease_pinged PROTO ((struct iaddr, u_int8_t *, int));
+void lease_ping_timeout PROTO ((void *));
+
+/* conflex.c */
+extern int lexline, lexchar;
+extern char *token_line, *tlname;
+extern char comments [4096];
+extern int comment_index;
+extern int eol_token;
+void new_parse PROTO ((char *));
+int next_token PROTO ((char **, FILE *));
+int peek_token PROTO ((char **, FILE *));
+
+/* confpars.c */
+int readconf PROTO ((void));
+void read_leases PROTO ((void));
+int parse_statement PROTO ((FILE *,
+			    struct group *, int, struct host_decl *, int));
+void parse_allow_deny PROTO ((FILE *, struct group *, int));
+void skip_to_semi PROTO ((FILE *));
+int parse_boolean PROTO ((FILE *));
+int parse_semi PROTO ((FILE *));
+int parse_lbrace PROTO ((FILE *));
+void parse_host_declaration PROTO ((FILE *, struct group *));
+char *parse_host_name PROTO ((FILE *));
+void parse_class_declaration PROTO ((FILE *, struct group *, int));
+void parse_lease_time PROTO ((FILE *, TIME *));
+void parse_shared_net_declaration PROTO ((FILE *, struct group *));
+void parse_subnet_declaration PROTO ((FILE *, struct shared_network *));
+void parse_group_declaration PROTO ((FILE *, struct group *));
+void parse_hardware_param PROTO ((FILE *, struct hardware *));
+char *parse_string PROTO ((FILE *));
+struct tree *parse_ip_addr_or_hostname PROTO ((FILE *, int));
+struct tree_cache *parse_fixed_addr_param PROTO ((FILE *));
+void parse_option_param PROTO ((FILE *, struct group *));
+TIME parse_timestamp PROTO ((FILE *));
+struct lease *parse_lease_declaration PROTO ((FILE *));
+void parse_address_range PROTO ((FILE *, struct subnet *));
+TIME parse_date PROTO ((FILE *));
+unsigned char *parse_numeric_aggregate PROTO ((FILE *,
+					       unsigned char *, int *,
+					       int, int, int));
+void convert_num PROTO ((unsigned char *, char *, int, int));
+
+/* tree.c */
+pair cons PROTO ((caddr_t, pair));
+struct tree_cache *tree_cache PROTO ((struct tree *));
+struct tree *tree_host_lookup PROTO ((char *));
+struct dns_host_entry *enter_dns_host PROTO ((char *));
+struct tree *tree_const PROTO ((unsigned char *, int));
+struct tree *tree_concat PROTO ((struct tree *, struct tree *));
+struct tree *tree_limit PROTO ((struct tree *, int));
+int tree_evaluate PROTO ((struct tree_cache *));
+
+/* dhcp.c */
+extern int outstanding_pings;
+
+void dhcp PROTO ((struct packet *));
+void dhcpdiscover PROTO ((struct packet *));
+void dhcprequest PROTO ((struct packet *));
+void dhcprelease PROTO ((struct packet *));
+void dhcpdecline PROTO ((struct packet *));
+void dhcpinform PROTO ((struct packet *));
+void nak_lease PROTO ((struct packet *, struct iaddr *cip));
+void ack_lease PROTO ((struct packet *, struct lease *, unsigned int, TIME));
+void dhcp_reply PROTO ((struct lease *));
+struct lease *find_lease PROTO ((struct packet *,
+				 struct shared_network *, int *));
+struct lease *mockup_lease PROTO ((struct packet *,
+				   struct shared_network *,
+				   struct host_decl *));
+
+/* bootp.c */
+void bootp PROTO ((struct packet *));
+
+/* memory.c */
+void enter_host PROTO ((struct host_decl *));
+struct host_decl *find_hosts_by_haddr PROTO ((int, unsigned char *, int));
+struct host_decl *find_hosts_by_uid PROTO ((unsigned char *, int));
+struct subnet *find_host_for_network PROTO ((struct host_decl **,
+					     struct iaddr *,
+					     struct shared_network *));
+void new_address_range PROTO ((struct iaddr, struct iaddr,
+			       struct subnet *, int));
+extern struct subnet *find_grouped_subnet PROTO ((struct shared_network *,
+						  struct iaddr));
+extern struct subnet *find_subnet PROTO ((struct iaddr));
+void enter_shared_network PROTO ((struct shared_network *));
+int subnet_inner_than PROTO ((struct subnet *, struct subnet *, int));
+void enter_subnet PROTO ((struct subnet *));
+void enter_lease PROTO ((struct lease *));
+int supersede_lease PROTO ((struct lease *, struct lease *, int));
+void release_lease PROTO ((struct lease *));
+void abandon_lease PROTO ((struct lease *, char *));
+struct lease *find_lease_by_uid PROTO ((unsigned char *, int));
+struct lease *find_lease_by_hw_addr PROTO ((unsigned char *, int));
+struct lease *find_lease_by_ip_addr PROTO ((struct iaddr));
+void uid_hash_add PROTO ((struct lease *));
+void uid_hash_delete PROTO ((struct lease *));
+void hw_hash_add PROTO ((struct lease *));
+void hw_hash_delete PROTO ((struct lease *));
+struct class *add_class PROTO ((int, char *));
+struct class *find_class PROTO ((int, unsigned char *, int));
+struct group *clone_group PROTO ((struct group *, char *));
+void write_leases PROTO ((void));
+void dump_subnets PROTO ((void));
+
+/* alloc.c */
+VOIDPTR dmalloc PROTO ((int, char *));
+void dfree PROTO ((VOIDPTR, char *));
+struct packet *new_packet PROTO ((char *));
+struct dhcp_packet *new_dhcp_packet PROTO ((char *));
+struct tree *new_tree PROTO ((char *));
+struct tree_cache *new_tree_cache PROTO ((char *));
+struct hash_table *new_hash_table PROTO ((int, char *));
+struct hash_bucket *new_hash_bucket PROTO ((char *));
+struct lease *new_lease PROTO ((char *));
+struct lease *new_leases PROTO ((int, char *));
+struct subnet *new_subnet PROTO ((char *));
+struct class *new_class PROTO ((char *));
+struct shared_network *new_shared_network PROTO ((char *));
+struct group *new_group PROTO ((char *));
+struct protocol *new_protocol PROTO ((char *));
+struct lease_state *new_lease_state PROTO ((char *));
+struct domain_search_list *new_domain_search_list PROTO ((char *));
+struct name_server *new_name_server PROTO ((char *));
+struct string_list *new_string_list PROTO ((size_t size, char * name));
+void free_name_server PROTO ((struct name_server *, char *));
+void free_domain_search_list PROTO ((struct domain_search_list *, char *));
+void free_lease_state PROTO ((struct lease_state *, char *));
+void free_protocol PROTO ((struct protocol *, char *));
+void free_group PROTO ((struct group *, char *));
+void free_shared_network PROTO ((struct shared_network *, char *));
+void free_class PROTO ((struct class *, char *));
+void free_subnet PROTO ((struct subnet *, char *));
+void free_lease PROTO ((struct lease *, char *));
+void free_hash_bucket PROTO ((struct hash_bucket *, char *));
+void free_hash_table PROTO ((struct hash_table *, char *));
+void free_tree_cache PROTO ((struct tree_cache *, char *));
+void free_packet PROTO ((struct packet *, char *));
+void free_dhcp_packet PROTO ((struct dhcp_packet *, char *));
+void free_tree PROTO ((struct tree *, char *));
+void free_string_list PROTO ((struct string_list *, char *));
+
+/* print.c */
+char *print_hw_addr PROTO ((int, int, unsigned char *));
+void print_lease PROTO ((struct lease *));
+void dump_raw PROTO ((unsigned char *, int));
+void dump_packet PROTO ((struct packet *));
+void hash_dump PROTO ((struct hash_table *));
+
+/* socket.c */
+#if defined (USE_SOCKET_SEND) || defined (USE_SOCKET_RECEIVE) \
+	|| defined (USE_SOCKET_FALLBACK)
+int if_register_socket PROTO ((struct interface_info *));
+#endif
+
+#if defined (USE_SOCKET_FALLBACK) && !defined (USE_SOCKET_SEND)
+void if_reinitialize_fallback PROTO ((struct interface_info *));
+void if_register_fallback PROTO ((struct interface_info *));
+ssize_t send_fallback PROTO ((struct interface_info *,
+			      struct packet *, struct dhcp_packet *, size_t, 
+			      struct in_addr,
+			      struct sockaddr_in *, struct hardware *));
+#endif
+
+#ifdef USE_SOCKET_SEND
+void if_reinitialize_send PROTO ((struct interface_info *));
+void if_register_send PROTO ((struct interface_info *));
+ssize_t send_packet PROTO ((struct interface_info *,
+			    struct packet *, struct dhcp_packet *, size_t, 
+			    struct in_addr,
+			    struct sockaddr_in *, struct hardware *));
+#endif
+#if defined (USE_SOCKET_FALLBACK)
+void fallback_discard PROTO ((struct protocol *));
+#endif
+#ifdef USE_SOCKET_RECEIVE
+void if_reinitialize_receive PROTO ((struct interface_info *));
+void if_register_receive PROTO ((struct interface_info *));
+ssize_t receive_packet PROTO ((struct interface_info *,
+			       unsigned char *, size_t,
+			       struct sockaddr_in *, struct hardware *));
+#endif
+#if defined (USE_SOCKET_SEND)
+int can_unicast_without_arp PROTO ((void));
+int can_receive_unicast_unconfigured PROTO ((struct interface_info *));
+void maybe_setup_fallback PROTO ((void));
+#endif
+
+/* bpf.c */
+#if defined (USE_BPF_SEND) || defined (USE_BPF_RECEIVE)
+int if_register_bpf PROTO ( (struct interface_info *));
+#endif
+#ifdef USE_BPF_SEND
+void if_reinitialize_send PROTO ((struct interface_info *));
+void if_register_send PROTO ((struct interface_info *));
+ssize_t send_packet PROTO ((struct interface_info *,
+			    struct packet *, struct dhcp_packet *, size_t,
+			    struct in_addr,
+			    struct sockaddr_in *, struct hardware *));
+#endif
+#ifdef USE_BPF_RECEIVE
+void if_reinitialize_receive PROTO ((struct interface_info *));
+void if_register_receive PROTO ((struct interface_info *));
+ssize_t receive_packet PROTO ((struct interface_info *,
+			       unsigned char *, size_t,
+			       struct sockaddr_in *, struct hardware *));
+#endif
+#if defined (USE_BPF_SEND)
+int can_unicast_without_arp PROTO ((void));
+int can_receive_unicast_unconfigured PROTO ((struct interface_info *));
+void maybe_setup_fallback PROTO ((void));
+#endif
+
+/* lpf.c */
+#if defined (USE_LPF_SEND) || defined (USE_LPF_RECEIVE)
+int if_register_lpf PROTO ( (struct interface_info *));
+#endif
+#ifdef USE_LPF_SEND
+void if_reinitialize_send PROTO ((struct interface_info *));
+void if_register_send PROTO ((struct interface_info *));
+ssize_t send_packet PROTO ((struct interface_info *,
+			    struct packet *, struct dhcp_packet *, size_t,
+			    struct in_addr,
+			    struct sockaddr_in *, struct hardware *));
+#endif
+#ifdef USE_LPF_RECEIVE
+void if_reinitialize_receive PROTO ((struct interface_info *));
+void if_register_receive PROTO ((struct interface_info *));
+ssize_t receive_packet PROTO ((struct interface_info *,
+			       unsigned char *, size_t,
+			       struct sockaddr_in *, struct hardware *));
+#endif
+#if defined (USE_LPF_SEND)
+int can_unicast_without_arp PROTO ((void));
+int can_receive_unicast_unconfigured PROTO ((struct interface_info *));
+void maybe_setup_fallback PROTO ((void));
+#endif
+
+/* nit.c */
+#if defined (USE_NIT_SEND) || defined (USE_NIT_RECEIVE)
+int if_register_nit PROTO ( (struct interface_info *));
+#endif
+
+#ifdef USE_NIT_SEND
+void if_reinitialize_send PROTO ((struct interface_info *));
+void if_register_send PROTO ((struct interface_info *));
+ssize_t send_packet PROTO ((struct interface_info *,
+			    struct packet *, struct dhcp_packet *, size_t,
+			    struct in_addr,
+			    struct sockaddr_in *, struct hardware *));
+#endif
+#ifdef USE_NIT_RECEIVE
+void if_reinitialize_receive PROTO ((struct interface_info *));
+void if_register_receive PROTO ((struct interface_info *));
+ssize_t receive_packet PROTO ((struct interface_info *,
+			       unsigned char *, size_t,
+			       struct sockaddr_in *, struct hardware *));
+#endif
+#if defined (USE_NIT_SEND)
+int can_unicast_without_arp PROTO ((void));
+int can_receive_unicast_unconfigured PROTO ((struct interface_info *));
+void maybe_setup_fallback PROTO ((void));
+#endif
+
+#ifdef USE_DLPI_SEND
+void if_reinitialize_send PROTO ((struct interface_info *));
+void if_register_send PROTO ((struct interface_info *));
+ssize_t send_packet PROTO ((struct interface_info *,
+			    struct packet *, struct dhcp_packet *, size_t,
+			    struct in_addr,
+			    struct sockaddr_in *, struct hardware *));
+#endif
+#ifdef USE_DLPI_RECEIVE
+void if_reinitialize_receive PROTO ((struct interface_info *));
+void if_register_receive PROTO ((struct interface_info *));
+ssize_t receive_packet PROTO ((struct interface_info *,
+			       unsigned char *, size_t,
+			       struct sockaddr_in *, struct hardware *));
+#endif
+#if defined (USE_DLPI_SEND)
+int can_unicast_without_arp PROTO ((void));
+int can_receive_unicast_unconfigured PROTO ((struct interface_info *));
+void maybe_setup_fallback PROTO ((void));
+#endif
+
+/* raw.c */
+#ifdef USE_RAW_SEND
+void if_reinitialize_send PROTO ((struct interface_info *));
+void if_register_send PROTO ((struct interface_info *));
+ssize_t send_packet PROTO ((struct interface_info *,
+			    struct packet *, struct dhcp_packet *, size_t,
+			    struct in_addr,
+			    struct sockaddr_in *, struct hardware *));
+int can_unicast_without_arp PROTO ((void));
+int can_receive_unicast_unconfigured PROTO ((struct interface_info *));
+void maybe_setup_fallback PROTO ((void));
+#endif
+
+/* dispatch.c */
+extern struct interface_info *interfaces,
+	*dummy_interfaces, *fallback_interface;
+extern struct protocol *protocols;
+extern int quiet_interface_discovery;
+extern void (*bootp_packet_handler) PROTO ((struct interface_info *,
+					    struct dhcp_packet *, int,
+					    unsigned int,
+					    struct iaddr, struct hardware *));
+extern struct timeout *timeouts;
+void discover_interfaces PROTO ((int));
+struct interface_info *setup_fallback PROTO ((void));
+void reinitialize_interfaces PROTO ((void));
+void dispatch PROTO ((void));
+int locate_network PROTO ((struct packet *));
+void got_one PROTO ((struct protocol *));
+void add_timeout PROTO ((TIME, void (*) PROTO ((void *)), void *));
+void cancel_timeout PROTO ((void (*) PROTO ((void *)), void *));
+void add_protocol PROTO ((char *, int,
+			  void (*) PROTO ((struct protocol *)), void *));
+
+void remove_protocol PROTO ((struct protocol *));
+
+/* hash.c */
+struct hash_table *new_hash PROTO ((void));
+void add_hash PROTO ((struct hash_table *, unsigned char *,
+		      int, unsigned char *));
+void delete_hash_entry PROTO ((struct hash_table *, unsigned char *, int));
+unsigned char *hash_lookup PROTO ((struct hash_table *, unsigned char *, int));
+
+/* tables.c */
+extern struct option dhcp_options [256];
+extern unsigned char dhcp_option_default_priority_list [];
+extern int sizeof_dhcp_option_default_priority_list;
+extern char *hardware_types [256];
+extern struct hash_table universe_hash;
+extern struct universe dhcp_universe;
+void initialize_universes PROTO ((void));
+
+/* convert.c */
+u_int32_t getULong PROTO ((unsigned char *));
+int32_t getLong PROTO ((unsigned char *));
+u_int16_t getUShort PROTO ((unsigned char *));
+int16_t getShort PROTO ((unsigned char *));
+void putULong PROTO ((unsigned char *, u_int32_t));
+void putLong PROTO ((unsigned char *, int32_t));
+void putUShort PROTO ((unsigned char *, unsigned int));
+void putShort PROTO ((unsigned char *, int));
+
+/* inet.c */
+struct iaddr subnet_number PROTO ((struct iaddr, struct iaddr));
+struct iaddr ip_addr PROTO ((struct iaddr, struct iaddr, u_int32_t));
+struct iaddr broadcast_addr PROTO ((struct iaddr, struct iaddr));
+u_int32_t host_addr PROTO ((struct iaddr, struct iaddr));
+int addr_eq PROTO ((struct iaddr, struct iaddr));
+char *piaddr PROTO ((struct iaddr));
+
+/* dhclient.c */
+extern char *path_dhclient_conf;
+extern char *path_dhclient_db;
+extern char *path_dhclient_pid;
+extern int interfaces_requested;
+
+extern struct client_config top_level_config;
+
+void dhcpoffer PROTO ((struct packet *));
+void dhcpack PROTO ((struct packet *));
+void dhcpnak PROTO ((struct packet *));
+
+void send_discover PROTO ((void *));
+void send_request PROTO ((void *));
+void send_release PROTO ((void *));
+void send_decline PROTO ((void *));
+
+void state_reboot PROTO ((void *));
+void state_init PROTO ((void *));
+void state_selecting PROTO ((void *));
+void state_requesting PROTO ((void *));
+void state_bound PROTO ((void *));
+void state_panic PROTO ((void *));
+
+void bind_lease PROTO ((struct interface_info *));
+
+void make_discover PROTO ((struct interface_info *, struct client_lease *));
+void make_request PROTO ((struct interface_info *, struct client_lease *));
+void make_decline PROTO ((struct interface_info *, struct client_lease *));
+void make_release PROTO ((struct interface_info *, struct client_lease *));
+
+void free_client_lease PROTO ((struct client_lease *));
+void rewrite_client_leases PROTO ((void));
+void write_client_lease PROTO ((struct interface_info *,
+				 struct client_lease *, int));
+
+void script_init PROTO ((struct interface_info *, char *,
+			 struct string_list *));
+void script_write_params PROTO ((struct interface_info *,
+				 char *, struct client_lease *));
+int script_go PROTO ((struct interface_info *));
+void client_envadd PROTO ((struct client_state *,
+			   const char *, const char *, const char *, ...));
+void script_set_env (struct client_state *, const char *, const char *,
+		     const char *);
+void script_flush_env(struct client_state *);
+int dhcp_option_ev_name (char *, size_t, struct option *);
+
+struct client_lease *packet_to_lease PROTO ((struct packet *));
+void go_daemon PROTO ((void));
+void write_client_pid_file PROTO ((void));
+void status_message PROTO ((struct sysconf_header *, void *));
+void client_location_changed PROTO ((void));
+
+/* db.c */
+int write_lease PROTO ((struct lease *));
+int commit_leases PROTO ((void));
+void db_startup PROTO ((void));
+void new_lease_file PROTO ((void));
+
+/* packet.c */
+u_int32_t checksum PROTO ((unsigned char *, unsigned, u_int32_t));
+u_int32_t wrapsum PROTO ((u_int32_t));
+void assemble_hw_header PROTO ((struct interface_info *, unsigned char *,
+				int *, struct hardware *));
+void assemble_udp_ip_header PROTO ((struct interface_info *, unsigned char *,
+				    int *, u_int32_t, u_int32_t, unsigned int,
+				    unsigned char *, int));
+ssize_t decode_hw_header PROTO ((struct interface_info *, unsigned char *,
+				 int, struct hardware *));
+ssize_t decode_udp_ip_header PROTO ((struct interface_info *, unsigned char *,
+				     int, struct sockaddr_in *,
+				     unsigned char *, int));
+
+/* ethernet.c */
+void assemble_ethernet_header PROTO ((struct interface_info *, unsigned char *,
+				      int *, struct hardware *));
+ssize_t decode_ethernet_header PROTO ((struct interface_info *,
+				       unsigned char *,
+				       int, struct hardware *));
+
+/* tr.c */
+void assemble_tr_header PROTO ((struct interface_info *, unsigned char *,
+				int *, struct hardware *));
+ssize_t decode_tr_header PROTO ((struct interface_info *,
+				 unsigned char *,
+				 int, struct hardware *));
+
+/* dhxpxlt.c */
+void convert_statement PROTO ((FILE *));
+void convert_host_statement PROTO ((FILE *, jrefproto));
+void convert_host_name PROTO ((FILE *, jrefproto));
+void convert_class_statement PROTO ((FILE *, jrefproto, int));
+void convert_class_decl PROTO ((FILE *, jrefproto));
+void convert_lease_time PROTO ((FILE *, jrefproto, char *));
+void convert_shared_net_statement PROTO ((FILE *, jrefproto));
+void convert_subnet_statement PROTO ((FILE *, jrefproto));
+void convert_subnet_decl PROTO ((FILE *, jrefproto));
+void convert_host_decl PROTO ((FILE *, jrefproto));
+void convert_hardware_decl PROTO ((FILE *, jrefproto));
+void convert_hardware_addr PROTO ((FILE *, jrefproto));
+void convert_filename_decl PROTO ((FILE *, jrefproto));
+void convert_servername_decl PROTO ((FILE *, jrefproto));
+void convert_ip_addr_or_hostname PROTO ((FILE *, jrefproto, int));
+void convert_fixed_addr_decl PROTO ((FILE *, jrefproto));
+void convert_option_decl PROTO ((FILE *, jrefproto));
+void convert_timestamp PROTO ((FILE *, jrefproto));
+void convert_lease_statement PROTO ((FILE *, jrefproto));
+void convert_address_range PROTO ((FILE *, jrefproto));
+void convert_date PROTO ((FILE *, jrefproto, char *));
+void convert_numeric_aggregate PROTO ((FILE *, jrefproto, int, int, int, int));
+void indent PROTO ((int));
+
+/* route.c */
+void add_route_direct PROTO ((struct interface_info *, struct in_addr));
+void add_route_net PROTO ((struct interface_info *, struct in_addr,
+			   struct in_addr));
+void add_route_default_gateway PROTO ((struct interface_info *, 
+				       struct in_addr));
+void remove_routes PROTO ((struct in_addr));
+void remove_if_route PROTO ((struct interface_info *, struct in_addr));
+void remove_all_if_routes PROTO ((struct interface_info *));
+void set_netmask PROTO ((struct interface_info *, struct in_addr));
+void set_broadcast_addr PROTO ((struct interface_info *, struct in_addr));
+void set_ip_address PROTO ((struct interface_info *, struct in_addr));
+
+/* clparse.c */
+int read_client_conf PROTO ((void));
+void read_client_leases PROTO ((void));
+void parse_client_statement PROTO ((FILE *, struct interface_info *,
+				    struct client_config *));
+int parse_X PROTO ((FILE *, u_int8_t *, int));
+int parse_option_list PROTO ((FILE *, u_int8_t *));
+void parse_interface_declaration PROTO ((FILE *, struct client_config *));
+struct interface_info *interface_or_dummy PROTO ((char *));
+void make_client_state PROTO ((struct interface_info *));
+void make_client_config PROTO ((struct interface_info *,
+				struct client_config *));
+void parse_client_lease_statement PROTO ((FILE *, int));
+void parse_client_lease_declaration PROTO ((FILE *, struct client_lease *,
+					    struct interface_info **));
+struct option *parse_option_decl PROTO ((FILE *, struct option_data *));
+void parse_string_list PROTO ((FILE *, struct string_list **, int));
+int parse_ip_addr PROTO ((FILE *, struct iaddr *));
+void parse_reject_statement PROTO ((FILE *, struct client_config *));
+
+/* dhcrelay.c */
+void relay PROTO ((struct interface_info *, struct dhcp_packet *, int,
+		   unsigned int, struct iaddr, struct hardware *));
+
+/* icmp.c */
+void icmp_startup PROTO ((int, void (*) PROTO ((struct iaddr,
+						u_int8_t *, int))));
+int icmp_echorequest PROTO ((struct iaddr *));
+void icmp_echoreply PROTO ((struct protocol *));
+
+/* dns.c */
+void dns_startup PROTO ((void));
+int ns_inaddr_lookup PROTO ((u_int16_t, struct iaddr));
+void dns_packet PROTO ((struct protocol *));
+
+/* resolv.c */
+extern char path_resolv_conf [];
+struct name_server *name_servers;
+struct domain_search_list *domains;
+
+void read_resolv_conf PROTO ((TIME));
+struct sockaddr_in *pick_name_server PROTO ((void));
+
+/* inet_addr.c */
+#ifdef NEED_INET_ATON
+int inet_aton PROTO ((const char *, struct in_addr *));
+#endif
+
+/* sysconf.c */
+void sysconf_startup PROTO ((void (*) (struct sysconf_header *, void *)));
+void sysconf_restart PROTO ((void *));
+void sysconf_message PROTO ((struct protocol *proto));