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/* $OpenBSD: dhcpd.h,v 1.157 2016/08/31 12:57:31 mpi Exp $ */
/*
* Copyright (c) 2004 Henning Brauer <henning@openbsd.org>
* 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''.
*/
#define LOCAL_PORT 68
#define REMOTE_PORT 67
#define INTERNALSIG INT_MAX
#define DB_TIMEFMT "%w %Y/%m/%d %T UTC"
#define BAD_DB_TIMEFMT "%u %Y/%m/%d %T"
#define OLD_DB_TIMEFMT "%w %Y/%m/%d %T"
struct option {
char *name;
char *format;
};
struct option_data {
unsigned int len;
u_int8_t *data;
};
struct reject_elem {
TAILQ_ENTRY(reject_elem) next;
struct in_addr addr;
};
struct client_lease {
TAILQ_ENTRY(client_lease) next;
time_t expiry, renewal, rebind;
struct in_addr address;
struct in_addr next_server;
char *server_name;
char *filename;
char *resolv_conf;
char ssid[33];
unsigned int is_static;
unsigned int is_bootp;
unsigned int is_invalid;
struct option_data options[256];
};
/* Possible states in which the client can be. */
enum dhcp_state {
S_PREBOOT,
S_REBOOTING,
S_INIT,
S_SELECTING,
S_REQUESTING,
S_BOUND,
S_RENEWING,
S_REBINDING
};
struct client_config {
struct option_data defaults[256];
enum {
ACTION_DEFAULT,
ACTION_SUPERSEDE,
ACTION_PREPEND,
ACTION_APPEND
} default_actions[256];
struct in_addr address;
struct in_addr next_server;
struct option_data send_options[256];
u_int8_t required_options[256];
u_int8_t requested_options[256];
u_int8_t ignored_options[256];
int requested_option_count;
int required_option_count;
int ignored_option_count;
time_t timeout;
time_t initial_interval;
time_t link_timeout;
time_t retry_interval;
time_t select_interval;
time_t reboot_timeout;
time_t backoff_cutoff;
enum { IGNORE, ACCEPT, PREFER }
bootp_policy;
TAILQ_HEAD(, reject_elem) reject_list;
char *resolv_tail;
char *filename;
char *server_name;
};
struct client_state {
struct client_lease *active;
struct client_lease *new;
TAILQ_HEAD(, client_lease) offered_leases;
TAILQ_HEAD(_leases, client_lease) leases;
enum dhcp_state state;
struct in_addr destination;
int flags;
#define IS_RESPONSIBLE 0x1
u_int32_t xid;
u_int16_t secs;
time_t first_sending;
time_t startup_time;
time_t interval;
struct dhcp_packet packet;
struct dhcp_packet bootrequest_packet;
int bootrequest_packet_length;
struct in_addr requested_address;
};
struct interface_info {
struct ether_addr hw_address;
char name[IFNAMSIZ];
char ssid[33];
struct client_state *client;
int bfdesc; /* bpf - reading & broadcast writing*/
int ufdesc; /* udp - unicast writing */
unsigned char *rbuf;
size_t rbuf_max;
size_t rbuf_offset;
size_t rbuf_len;
int errors;
u_int16_t index;
int linkstat;
int rdomain;
int flags;
#define IFI_VALID_LLADDR 0x00000001
#define IFI_NEW_LLADDR 0x00000002
#define IFI_NOMEDIA 0x00000004
#define IFI_HUP 0x00000008
};
struct dhcp_timeout {
time_t when;
void (*func)(void);
};
#define _PATH_DHCLIENT_CONF "/etc/dhclient.conf"
#define _PATH_DHCLIENT_DB "/var/db/dhclient.leases"
/* External definitions. */
extern struct client_config *config;
extern struct imsgbuf *unpriv_ibuf;
extern struct in_addr deleting;
extern struct in_addr adding;
extern struct in_addr active_addr;
extern volatile sig_atomic_t quit;
/* options.c */
int cons_options(struct interface_info *, struct option_data *);
char *pretty_print_option(unsigned int, struct option_data *, int);
int pretty_print_string(unsigned char *, size_t, unsigned char *, size_t, int);
int pretty_print_classless_routes(unsigned char *, size_t, unsigned char *,
size_t);
int pretty_print_domain_search(unsigned char *, size_t, unsigned char *,
size_t);
void do_packet(struct interface_info *, unsigned int, struct in_addr,
struct ether_addr *);
/* errwarn.c */
extern int warnings_occurred;
void error(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
void warning(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
void note(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
#ifdef DEBUG
void debug(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
#endif
void parse_warn(char *);
/* conflex.c */
extern int lexline, lexchar;
extern char *token_line, *tlname;
void new_parse(char *);
int next_token(char **, FILE *);
int peek_token(char **, FILE *);
/* parse.c */
void skip_to_semi(FILE *);
int parse_semi(FILE *);
char *parse_string(FILE *);
int parse_ip_addr(FILE *, struct in_addr *);
int parse_cidr(FILE *, unsigned char *);
void parse_ethernet(FILE *, struct ether_addr *);
void parse_lease_time(FILE *, time_t *);
int parse_decimal(FILE *, unsigned char *, char);
int parse_hex(FILE *, unsigned char *);
time_t parse_date(FILE *);
/* bpf.c */
void if_register_send(struct interface_info *);
void if_register_receive(struct interface_info *);
ssize_t send_packet(struct interface_info *, struct in_addr, struct in_addr);
ssize_t receive_packet(struct interface_info *, struct sockaddr_in *,
struct ether_addr *);
/* dispatch.c */
void dispatch(struct interface_info *);
void set_timeout(time_t, void (*)(void));
void set_timeout_interval(time_t, void (*)(void));
void cancel_timeout(void);
void interface_link_forceup(char *);
int interface_status(struct interface_info *);
int get_rdomain(char *);
void get_hw_address(struct interface_info *);
/* tables.c */
extern const struct option dhcp_options[256];
/* dhclient.c */
extern char *path_dhclient_conf;
extern char *path_dhclient_db;
extern int log_perror;
extern int routefd;
void dhcpoffer(struct in_addr, struct option_data *, char *);
void dhcpack(struct in_addr, struct option_data *, char *);
void dhcpnak(struct in_addr, struct option_data *, char *);
void free_client_lease(struct client_lease *);
void routehandler(void);
/* packet.c */
void assemble_eh_header(struct interface_info *, struct ether_header *);
ssize_t decode_hw_header(unsigned char *, int, struct ether_addr *);
ssize_t decode_udp_ip_header(unsigned char *, int, struct sockaddr_in *,
int);
u_int32_t checksum(unsigned char *, unsigned, u_int32_t);
u_int32_t wrapsum(u_int32_t);
/* clparse.c */
void read_client_conf(struct interface_info *);
void read_client_leases(struct interface_info *);
/* kroute.c */
void delete_addresses(struct interface_info *);
void delete_address(struct in_addr);
void set_interface_mtu(int);
void add_address(struct in_addr, struct in_addr);
void flush_routes(void);
void add_route(struct in_addr, struct in_addr, struct in_addr, struct in_addr,
int, int);
void sendhup(struct client_lease *);
int resolv_conf_priority(struct interface_info *);
void flush_unpriv_ibuf(const char *);
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