dll/win32/dhcpcsvc/include/dhcpd.h

   1 /*      $OpenBSD: dhcpd.h,v 1.33 2004/05/06 22:29:15 deraadt Exp $      */
   2
   3 /*
   4  * Copyright (c) 2004 Henning Brauer <henning@openbsd.org>
   5  * Copyright (c) 1995, 1996, 1997, 1998, 1999
   6  * The Internet Software Consortium.    All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of The Internet Software Consortium nor the names
  18  *    of its contributors may be used to endorse or promote products derived
  19  *    from this software without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
  22  * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  23  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  24  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  25  * DISCLAIMED.  IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
  26  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  27  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  28  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  29  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  30  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  31  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  32  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  * This software has been written for the Internet Software Consortium
  36  * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
  37  * Enterprises.  To learn more about the Internet Software Consortium,
  38  * see ``http://www.vix.com/isc''.  To learn more about Vixie
  39  * Enterprises, see ``http://www.vix.com''.
  40  */
  41
  42 #pragma once
  43
  44 #include <winsock2.h>
  45 #include <iphlpapi.h>
  46 #include "stdint.h"
  47
  48 #define IFNAMSIZ MAX_INTERFACE_NAME_LEN
  49
  50 #define ETH_ALEN 6
  51 #define ETHER_ADDR_LEN  ETH_ALEN
  52 #include <pshpack1.h>
  53 struct ether_header
  54 {
  55   u_int8_t  ether_dhost[ETH_ALEN];      /* destination eth addr */
  56   u_int8_t  ether_shost[ETH_ALEN];      /* source ether addr    */
  57   u_int16_t ether_type;                 /* packet type ID field */
  58 };
  59 #include <poppack.h>
  60
  61 struct ip
  62   {
  63     unsigned int ip_hl:4;               /* header length */
  64     unsigned int ip_v:4;                /* version */
  65     u_int8_t ip_tos;                    /* type of service */
  66     u_short ip_len;                     /* total length */
  67     u_short ip_id;                      /* identification */
  68     u_short ip_off;                     /* fragment offset field */
  69 #define IP_RF 0x8000                    /* reserved fragment flag */
  70 #define IP_DF 0x4000                    /* dont fragment flag */
  71 #define IP_MF 0x2000                    /* more fragments flag */
  72 #define IP_OFFMASK 0x1fff               /* mask for fragmenting bits */
  73     u_int8_t ip_ttl;                    /* time to live */
  74     u_int8_t ip_p;                      /* protocol */
  75     u_short ip_sum;                     /* checksum */
  76     struct in_addr ip_src, ip_dst;      /* source and dest address */
  77   };
  78
  79 struct udphdr {
  80         u_int16_t uh_sport;           /* source port */
  81         u_int16_t uh_dport;           /* destination port */
  82         u_int16_t uh_ulen;            /* udp length */
  83         u_int16_t uh_sum;             /* udp checksum */
  84 };
  85
  86 #define ETHERTYPE_IP 0x0800
  87 #define IPTOS_LOWDELAY 0x10
  88 #define ARPHRD_ETHER 1
  89
  90 // FIXME: I have no idea what this should be!
  91 #define SIZE_T_MAX 1600
  92
  93 #define USE_SOCKET_RECEIVE
  94 #define USE_SOCKET_SEND
  95
  96 #include <sys/types.h>
  97 #include <sys/stat.h>
  98 //#include <sys/time.h>
  99 #include <ctype.h>
 100 #include <fcntl.h>
 101 #include <limits.h>
 102 //#include <unistd.h>
 103 #include <stdio.h>
 104 #include <stdlib.h>
 105 #include <string.h>
 106 #include <time.h>
 107 //#include <unistd.h>
 108
 109 #include "dhcp.h"
 110 #include "tree.h"
 111
 112 #define LOCAL_PORT      68
 113 #define REMOTE_PORT     67
 114
 115 struct option_data {
 116         int              len;
 117         u_int8_t        *data;
 118 };
 119
 120 struct string_list {
 121         struct string_list      *next;
 122         char                    *string;
 123 };
 124
 125 struct iaddr {
 126         int len;
 127         unsigned char iabuf[16];
 128 };
 129
 130 struct iaddrlist {
 131         struct iaddrlist *next;
 132         struct iaddr addr;
 133 };
 134
 135 struct packet {
 136         struct dhcp_packet      *raw;
 137         int                      packet_length;
 138         int                      packet_type;
 139         int                      options_valid;
 140         int                      client_port;
 141         struct iaddr             client_addr;
 142         struct interface_info   *interface;
 143         struct hardware         *haddr;
 144         struct option_data       options[256];
 145 };
 146
 147 struct hardware {
 148         u_int8_t htype;
 149         u_int8_t hlen;
 150         u_int8_t haddr[16];
 151 };
 152
 153 struct client_lease {
 154         struct client_lease     *next;
 155         time_t                   expiry, renewal, rebind;
 156         struct iaddr             address;
 157         char                    *server_name;
 158 #ifdef __REACTOS__
 159         time_t                   obtained;
 160         struct iaddr             serveraddress;
 161 #endif
 162         char                    *filename;
 163         struct string_list      *medium;
 164         unsigned int             is_static : 1;
 165         unsigned int             is_bootp : 1;
 166         struct option_data       options[256];
 167 };
 168
 169 /* Possible states in which the client can be. */
 170 enum dhcp_state {
 171         S_REBOOTING,
 172         S_INIT,
 173         S_SELECTING,
 174         S_REQUESTING,
 175         S_BOUND,
 176         S_RENEWING,
 177         S_REBINDING,
 178         S_STATIC
 179 };
 180
 181 struct client_config {
 182         struct option_data      defaults[256];
 183         enum {
 184                 ACTION_DEFAULT,
 185                 ACTION_SUPERSEDE,
 186                 ACTION_PREPEND,
 187                 ACTION_APPEND
 188         } default_actions[256];
 189
 190         struct option_data       send_options[256];
 191         u_int8_t                 required_options[256];
 192         u_int8_t                 requested_options[256];
 193         int                      requested_option_count;
 194         time_t                   timeout;
 195         time_t                   initial_interval;
 196         time_t                   retry_interval;
 197         time_t                   select_interval;
 198         time_t                   reboot_timeout;
 199         time_t                   backoff_cutoff;
 200         struct string_list      *media;
 201         char                    *script_name;
 202         enum { IGNORE, ACCEPT, PREFER }
 203                                  bootp_policy;
 204         struct string_list      *medium;
 205         struct iaddrlist        *reject_list;
 206 };
 207
 208 struct client_state {
 209         struct client_lease      *active;
 210         struct client_lease      *new;
 211         struct client_lease      *offered_leases;
 212         struct client_lease      *leases;
 213         struct client_lease      *alias;
 214         enum dhcp_state           state;
 215         struct iaddr              destination;
 216         u_int32_t                 xid;
 217         u_int16_t                 secs;
 218         time_t                    first_sending;
 219         time_t                    interval;
 220         struct string_list       *medium;
 221         struct dhcp_packet        packet;
 222         int                       packet_length;
 223         struct iaddr              requested_address;
 224         struct client_config     *config;
 225 };
 226
 227 struct interface_info {
 228         struct interface_info   *next;
 229         struct hardware          hw_address;
 230         struct in_addr           primary_address;
 231         char                     name[IFNAMSIZ];
 232         int                      rfdesc;
 233         int                      wfdesc;
 234         unsigned char           *rbuf;
 235         size_t                   rbuf_max;
 236         size_t                   rbuf_offset;
 237         size_t                   rbuf_len;
 238         struct client_state     *client;
 239         int                      noifmedia;
 240         int                      errors;
 241         int                      dead;
 242         u_int16_t                index;
 243 };
 244
 245 struct timeout {
 246         struct timeout  *next;
 247         time_t           when;
 248         void             (*func)(void *);
 249         void            *what;
 250 };
 251
 252 struct protocol {
 253         struct protocol *next;
 254         int fd;
 255         void (*handler)(struct protocol *);
 256         void *local;
 257 };
 258
 259 #define DEFAULT_HASH_SIZE 97
 260
 261 struct hash_bucket {
 262         struct hash_bucket *next;
 263         unsigned char *name;
 264         int len;
 265         unsigned char *value;
 266 };
 267
 268 struct hash_table {
 269         int hash_count;
 270         struct hash_bucket *buckets[DEFAULT_HASH_SIZE];
 271 };
 272
 273 /* Default path to dhcpd config file. */
 274 #define _PATH_DHCLIENT_CONF     "/etc/dhclient.conf"
 275 #define _PATH_DHCLIENT_DB       "/var/db/dhclient.leases"
 276 #define DHCPD_LOG_FACILITY      LOG_DAEMON
 277
 278 #define MAX_TIME 0x7fffffff
 279 #define MIN_TIME 0
 280
 281 /* External definitions... */
 282
 283 /* options.c */
 284 int cons_options(struct packet *, struct dhcp_packet *, int,
 285     struct tree_cache **, int, int, int, u_int8_t *, int);
 286 char *pretty_print_option(unsigned int,
 287     unsigned char *, int, int, int);
 288 void do_packet(struct interface_info *, struct dhcp_packet *,
 289     int, unsigned int, struct iaddr, struct hardware *);
 290
 291 /* errwarn.c */
 292 extern int warnings_occurred;
 293 #ifdef _MSC_VER
 294 void error(char *, ...);
 295 int warning(char *, ...);
 296 int note(char *, ...);
 297 int debug(char *, ...);
 298 int parse_warn(char *, ...);
 299 #else
 300 void error(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
 301 int warning(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
 302 int note(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
 303 int debug(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
 304 int parse_warn(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
 305 #endif
 306
 307 /* conflex.c */
 308 extern int lexline, lexchar;
 309 extern char *token_line, *tlname;
 310 extern char comments[4096];
 311 extern int comment_index;
 312 extern int eol_token;
 313 void new_parse(char *);
 314 int next_token(char **, FILE *);
 315 int peek_token(char **, FILE *);
 316
 317 /* parse.c */
 318 void skip_to_semi(FILE *);
 319 int parse_semi(FILE *);
 320 char *parse_string(FILE *);
 321 int parse_ip_addr(FILE *, struct iaddr *);
 322 void parse_hardware_param(FILE *, struct hardware *);
 323 void parse_lease_time(FILE *, time_t *);
 324 unsigned char *parse_numeric_aggregate(FILE *, unsigned char *, int *,
 325     int, int, int);
 326 void convert_num(unsigned char *, char *, int, int);
 327 time_t parse_date(FILE *);
 328
 329 /* tree.c */
 330 pair cons(caddr_t, pair);
 331
 332 /* alloc.c */
 333 struct string_list      *new_string_list(size_t size);
 334 struct hash_table       *new_hash_table(int);
 335 struct hash_bucket      *new_hash_bucket(void);
 336 void dfree(void *, char *);
 337 void free_hash_bucket(struct hash_bucket *, char *);
 338
 339
 340 /* bpf.c */
 341 int if_register_bpf(struct interface_info *);
 342 void if_register_send(struct interface_info *);
 343 void if_register_receive(struct interface_info *);
 344 ssize_t send_packet(struct interface_info *, struct dhcp_packet *, size_t,
 345     struct in_addr, struct sockaddr_in *, struct hardware *);
 346 ssize_t receive_packet(struct interface_info *, unsigned char *, size_t,
 347     struct sockaddr_in *, struct hardware *);
 348
 349 /* dispatch.c */
 350 extern void (*bootp_packet_handler)(struct interface_info *,
 351     struct dhcp_packet *, int, unsigned int, struct iaddr, struct hardware *);
 352 void discover_interfaces(struct interface_info *);
 353 void reinitialize_interfaces(void);
 354 void dispatch(void);
 355 void got_one(struct protocol *);
 356 void add_timeout(time_t, void (*)(void *), void *);
 357 void cancel_timeout(void (*)(void *), void *);
 358 void add_protocol(char *, int, void (*)(struct protocol *), void *);
 359 void remove_protocol(struct protocol *);
 360 struct protocol *find_protocol_by_adapter( struct interface_info * );
 361 int interface_link_status(char *);
 362
 363 /* hash.c */
 364 struct hash_table *new_hash(void);
 365 void add_hash(struct hash_table *, unsigned char *, int, unsigned char *);
 366 unsigned char *hash_lookup(struct hash_table *, unsigned char *, int);
 367
 368 /* tables.c */
 369 extern struct dhcp_option dhcp_options[256];
 370 extern unsigned char dhcp_option_default_priority_list[];
 371 extern int sizeof_dhcp_option_default_priority_list;
 372 extern struct hash_table universe_hash;
 373 extern struct universe dhcp_universe;
 374 void initialize_universes(void);
 375
 376 /* convert.c */
 377 u_int32_t getULong(unsigned char *);
 378 int32_t getLong(unsigned char *);
 379 u_int16_t getUShort(unsigned char *);
 380 int16_t getShort(unsigned char *);
 381 void putULong(unsigned char *, u_int32_t);
 382 void putLong(unsigned char *, int32_t);
 383 void putUShort(unsigned char *, unsigned int);
 384 void putShort(unsigned char *, int);
 385
 386 /* inet.c */
 387 struct iaddr subnet_number(struct iaddr, struct iaddr);
 388 struct iaddr broadcast_addr(struct iaddr, struct iaddr);
 389 int addr_eq(struct iaddr, struct iaddr);
 390 char *piaddr(struct iaddr);
 391
 392 /* dhclient.c */
 393 extern char *path_dhclient_conf;
 394 extern char *path_dhclient_db;
 395 extern time_t cur_time;
 396 extern int log_priority;
 397 extern int log_perror;
 398
 399 extern struct client_config top_level_config;
 400
 401 void dhcpoffer(struct packet *);
 402 void dhcpack(struct packet *);
 403 void dhcpnak(struct packet *);
 404
 405 void send_discover(void *);
 406 void send_request(void *);
 407 void send_decline(void *);
 408
 409 void state_reboot(void *);
 410 void state_init(void *);
 411 void state_selecting(void *);
 412 void state_requesting(void *);
 413 void state_bound(void *);
 414 void state_panic(void *);
 415
 416 void bind_lease(struct interface_info *);
 417
 418 void make_discover(struct interface_info *, struct client_lease *);
 419 void make_request(struct interface_info *, struct client_lease *);
 420 void make_decline(struct interface_info *, struct client_lease *);
 421
 422 void free_client_lease(struct client_lease *);
 423 void rewrite_client_leases(struct interface_info *);
 424 void write_client_lease(struct interface_info *, struct client_lease *, int);
 425
 426 void     priv_script_init(struct interface_info *, char *, char *);
 427 void     priv_script_write_params(struct interface_info *, char *, struct client_lease *);
 428 int      priv_script_go(void);
 429
 430 void script_init(char *, struct string_list *);
 431 void script_write_params(char *, struct client_lease *);
 432 int script_go(void);
 433 void client_envadd(struct client_state *,
 434     const char *, const char *, const char *, ...);
 435 void script_set_env(struct client_state *, const char *, const char *,
 436     const char *);
 437 void script_flush_env(struct client_state *);
 438 int dhcp_option_ev_name(char *, size_t, struct dhcp_option *);
 439
 440 struct client_lease *packet_to_lease(struct packet *);
 441 void go_daemon(void);
 442 void client_location_changed(void);
 443
 444 void bootp(struct packet *);
 445 void dhcp(struct packet *);
 446
 447 /* packet.c */
 448 void assemble_hw_header(struct interface_info *, unsigned char *,
 449     int *, struct hardware *);
 450 void assemble_udp_ip_header(unsigned char *, int *, u_int32_t, u_int32_t,
 451     unsigned int, unsigned char *, int);
 452 ssize_t decode_hw_header(unsigned char *, int, struct hardware *);
 453 ssize_t decode_udp_ip_header(unsigned char *, int, struct sockaddr_in *,
 454     unsigned char *, int);
 455
 456 /* ethernet.c */
 457 void assemble_ethernet_header(struct interface_info *, unsigned char *,
 458     int *, struct hardware *);
 459 ssize_t decode_ethernet_header(struct interface_info *, unsigned char *,
 460     int, struct hardware *);
 461
 462 /* clparse.c */
 463 int read_client_conf(struct interface_info *);
 464 void read_client_leases(void);
 465 void parse_client_statement(FILE *, struct interface_info *,
 466     struct client_config *);
 467 int parse_X(FILE *, u_int8_t *, int);
 468 int parse_option_list(FILE *, u_int8_t *);
 469 void parse_interface_declaration(FILE *, struct client_config *);
 470 struct interface_info *interface_or_dummy(char *);
 471 void make_client_state(struct interface_info *);
 472 void make_client_config(struct interface_info *, struct client_config *);
 473 void parse_client_lease_statement(FILE *, int);
 474 void parse_client_lease_declaration(FILE *, struct client_lease *,
 475     struct interface_info **);
 476 struct dhcp_option *parse_option_decl(FILE *, struct option_data *);
 477 void parse_string_list(FILE *, struct string_list **, int);
 478 void parse_reject_statement(FILE *, struct client_config *);
 479
 480 /* privsep.c */
 481 struct buf      *buf_open(size_t);
 482 int              buf_add(struct buf *, void *, size_t);
 483 int              buf_close(int, struct buf *);
 484 ssize_t          buf_read(int, void *, size_t);
 485 void             dispatch_imsg(int);