1/* 2 * pppd.h - PPP daemon global declarations. 3 * 4 * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 18 * 3. The name "Carnegie Mellon University" must not be used to 19 * endorse or promote products derived from this software without 20 * prior written permission. For permission or any legal 21 * details, please contact 22 * Office of Technology Transfer 23 * Carnegie Mellon University 24 * 5000 Forbes Avenue 25 * Pittsburgh, PA 15213-3890 26 * (412) 268-4387, fax: (412) 268-7395 27 * tech-transfer@andrew.cmu.edu 28 * 29 * 4. Redistributions of any form whatsoever must retain the following 30 * acknowledgment: 31 * "This product includes software developed by Computing Services 32 * at Carnegie Mellon University (http://www.cmu.edu/computing/)." 33 * 34 * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO 35 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 36 * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE 37 * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 38 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN 39 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 40 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 41 * 42 * $Id: pppd.h,v 1.1.1.1 2008/10/15 03:30:46 james26_jang Exp $ 43 */ 44 45/* 46 * TODO: 47 */ 48 49#ifndef __PPPD_H__ 50#define __PPPD_H__ 51 52#include <stdio.h> /* for FILE */ 53#include <limits.h> /* for NGROUPS_MAX */ 54#include <sys/param.h> /* for MAXPATHLEN and BSD4_4, if defined */ 55#include <sys/types.h> /* for u_int32_t, if defined */ 56#include <sys/time.h> /* for struct timeval */ 57#include <net/ppp_defs.h> 58#include "patchlevel.h" 59 60#if defined(__STDC__) 61#include <stdarg.h> 62#define __V(x) x 63#else 64#include <varargs.h> 65#define __V(x) (va_alist) va_dcl 66#define const 67#define volatile 68#endif 69 70#ifdef INET6 71#include "eui64.h" 72#endif 73 74/* 75 * Limits. 76 */ 77 78#define NUM_PPP 1 /* One PPP interface supported (per process) */ 79#define MAXWORDLEN 1024 /* max length of word in file (incl null) */ 80#define MAXARGS 1 /* max # args to a command */ 81#define MAXNAMELEN 256 /* max length of hostname or name for auth */ 82#define MAXSECRETLEN 256 /* max length of password or secret */ 83 84/* 85 * Option descriptor structure. 86 */ 87 88typedef unsigned char bool; 89 90enum opt_type { 91 o_special_noarg = 0, 92 o_special = 1, 93 o_bool, 94 o_int, 95 o_uint32, 96 o_string, 97 o_wild 98}; 99 100typedef struct { 101 char *name; /* name of the option */ 102 enum opt_type type; 103 void *addr; 104 char *description; 105 unsigned int flags; 106 void *addr2; 107 int upper_limit; 108 int lower_limit; 109 const char *source; 110 short int priority; 111 short int winner; 112} option_t; 113 114/* Values for flags */ 115#define OPT_VALUE 0xff /* mask for presupplied value */ 116#define OPT_HEX 0x100 /* int option is in hex */ 117#define OPT_NOARG 0x200 /* option doesn't take argument */ 118#define OPT_OR 0x400 /* OR in argument to value */ 119#define OPT_INC 0x800 /* increment value */ 120#define OPT_A2OR 0x800 /* for o_bool, OR arg to *(u_char *)addr2 */ 121#define OPT_PRIV 0x1000 /* privileged option */ 122#define OPT_STATIC 0x2000 /* string option goes into static array */ 123#define OPT_LLIMIT 0x4000 /* check value against lower limit */ 124#define OPT_ULIMIT 0x8000 /* check value against upper limit */ 125#define OPT_LIMITS (OPT_LLIMIT|OPT_ULIMIT) 126#define OPT_ZEROOK 0x10000 /* 0 value is OK even if not within limits */ 127#define OPT_HIDE 0x10000 /* for o_string, print value as ?????? */ 128#define OPT_A2LIST 0x10000 /* for o_special, keep list of values */ 129#define OPT_A2CLRB 0x10000 /* o_bool, clr val bits in *(u_char *)addr2 */ 130#define OPT_NOINCR 0x20000 /* value mustn't be increased */ 131#define OPT_ZEROINF 0x40000 /* with OPT_NOINCR, 0 == infinity */ 132#define OPT_PRIO 0x80000 /* process option priorities for this option */ 133#define OPT_PRIOSUB 0x100000 /* subsidiary member of priority group */ 134#define OPT_ALIAS 0x200000 /* option is alias for previous option */ 135#define OPT_A2COPY 0x400000 /* addr2 -> second location to rcv value */ 136#define OPT_ENABLE 0x800000 /* use *addr2 as enable for option */ 137#define OPT_A2CLR 0x1000000 /* clear *(bool *)addr2 */ 138#define OPT_PRIVFIX 0x2000000 /* user can't override if set by root */ 139#define OPT_INITONLY 0x4000000 /* option can only be set in init phase */ 140#define OPT_DEVEQUIV 0x8000000 /* equiv to device name */ 141#define OPT_DEVNAM (OPT_INITONLY | OPT_DEVEQUIV) 142#define OPT_A2PRINTER 0x10000000 /* *addr2 is a fn for printing option */ 143#define OPT_A2STRVAL 0x20000000 /* *addr2 points to current string value */ 144#define OPT_NOPRINT 0x40000000 /* don't print this option at all */ 145 146#define OPT_VAL(x) ((x) & OPT_VALUE) 147 148/* Values for priority */ 149#define OPRIO_DEFAULT 0 /* a default value */ 150#define OPRIO_CFGFILE 1 /* value from a configuration file */ 151#define OPRIO_CMDLINE 2 /* value from the command line */ 152#define OPRIO_SECFILE 3 /* value from options in a secrets file */ 153#define OPRIO_ROOT 100 /* added to priority if OPT_PRIVFIX && root */ 154 155#ifndef GIDSET_TYPE 156#define GIDSET_TYPE gid_t 157#endif 158 159/* Structure representing a list of permitted IP addresses. */ 160struct permitted_ip { 161 int permit; /* 1 = permit, 0 = forbid */ 162 u_int32_t base; /* match if (addr & mask) == base */ 163 u_int32_t mask; /* base and mask are in network byte order */ 164}; 165 166/* 167 * Unfortunately, the linux kernel driver uses a different structure 168 * for statistics from the rest of the ports. 169 * This structure serves as a common representation for the bits 170 * pppd needs. 171 */ 172struct pppd_stats { 173 unsigned int bytes_in; 174 unsigned int bytes_out; 175 unsigned int pkts_in; 176 unsigned int pkts_out; 177}; 178 179/* Used for storing a sequence of words. Usually malloced. */ 180struct wordlist { 181 struct wordlist *next; 182 char *word; 183}; 184 185/* An endpoint discriminator, used with multilink. */ 186#define MAX_ENDP_LEN 20 /* maximum length of discriminator value */ 187struct epdisc { 188 unsigned char class; 189 unsigned char length; 190 unsigned char value[MAX_ENDP_LEN]; 191}; 192 193/* values for epdisc.class */ 194#define EPD_NULL 0 /* null discriminator, no data */ 195#define EPD_LOCAL 1 196#define EPD_IP 2 197#define EPD_MAC 3 198#define EPD_MAGIC 4 199#define EPD_PHONENUM 5 200 201typedef void (*notify_func) __P((void *, int)); 202 203struct notifier { 204 struct notifier *next; 205 notify_func func; 206 void *arg; 207}; 208 209/* 210 * Global variables. 211 */ 212extern bool tx_only; /* JYWeng 20031216: idle time counting on tx traffic */ 213 214extern int hungup; /* Physical layer has disconnected */ 215extern int ifunit; /* Interface unit number */ 216extern char ifname[]; /* Interface name */ 217extern char hostname[]; /* Our hostname */ 218extern u_char outpacket_buf[]; /* Buffer for outgoing packets */ 219extern int phase; /* Current state of link - see values below */ 220extern int baud_rate; /* Current link speed in bits/sec */ 221extern char *progname; /* Name of this program */ 222extern int redirect_stderr;/* Connector's stderr should go to file */ 223extern char peer_authname[];/* Authenticated name of peer */ 224extern int auth_done[NUM_PPP]; /* Methods actually used for auth */ 225extern int privileged; /* We were run by real-uid root */ 226extern int need_holdoff; /* Need holdoff period after link terminates */ 227extern char **script_env; /* Environment variables for scripts */ 228extern int detached; /* Have detached from controlling tty */ 229extern GIDSET_TYPE groups[NGROUPS_MAX]; /* groups the user is in */ 230extern int ngroups; /* How many groups valid in groups */ 231extern struct pppd_stats link_stats; /* byte/packet counts etc. for link */ 232extern int link_stats_valid; /* set if link_stats is valid */ 233extern unsigned link_connect_time; /* time the link was up for */ 234extern int using_pty; /* using pty as device (notty or pty opt.) */ 235extern int log_to_fd; /* logging to this fd as well as syslog */ 236extern bool log_default; /* log_to_fd is default (stdout) */ 237extern char *no_ppp_msg; /* message to print if ppp not in kernel */ 238extern volatile int status; /* exit status for pppd */ 239extern bool devnam_fixed; /* can no longer change devnam */ 240extern int unsuccess; /* # unsuccessful connection attempts */ 241extern int do_callback; /* set if we want to do callback next */ 242extern int doing_callback; /* set if this is a callback */ 243extern int error_count; /* # of times error() has been called */ 244extern char ppp_devnam[MAXPATHLEN]; 245extern char remote_number[MAXNAMELEN]; /* Remote telephone number, if avail. */ 246extern int ppp_session_number; /* Session number (eg PPPoE session) */ 247 248extern int listen_time; /* time to listen first (ms) */ 249extern struct notifier *pidchange; /* for notifications of pid changing */ 250extern struct notifier *phasechange; /* for notifications of phase changes */ 251extern struct notifier *exitnotify; /* for notification that we're exiting */ 252extern struct notifier *sigreceived; /* notification of received signal */ 253extern struct notifier *ip_up_notifier; /* IPCP has come up */ 254extern struct notifier *ip_down_notifier; /* IPCP has gone down */ 255extern struct notifier *auth_up_notifier; /* peer has authenticated */ 256extern struct notifier *link_down_notifier; /* link has gone down */ 257extern struct notifier *fork_notifier; /* we are a new child process */ 258 259/* Values for do_callback and doing_callback */ 260#define CALLBACK_DIALIN 1 /* we are expecting the call back */ 261#define CALLBACK_DIALOUT 2 /* we are dialling out to call back */ 262 263/* 264 * Variables set by command-line options. 265 */ 266 267extern int debug; /* Debug flag */ 268extern int kdebugflag; /* Tell kernel to print debug messages */ 269extern int default_device; /* Using /dev/tty or equivalent */ 270extern char devnam[MAXPATHLEN]; /* Device name */ 271extern int crtscts; /* Use hardware flow control */ 272extern bool modem; /* Use modem control lines */ 273extern int inspeed; /* Input/Output speed requested */ 274extern u_int32_t netmask; /* IP netmask to set on interface */ 275extern bool lockflag; /* Create lock file to lock the serial dev */ 276extern bool nodetach; /* Don't detach from controlling tty */ 277extern bool updetach; /* Detach from controlling tty when link up */ 278extern char *initializer; /* Script to initialize physical link */ 279extern char *connect_script; /* Script to establish physical link */ 280extern char *disconnect_script; /* Script to disestablish physical link */ 281extern char *welcomer; /* Script to welcome client after connection */ 282extern char *ptycommand; /* Command to run on other side of pty */ 283extern int maxconnect; /* Maximum connect time (seconds) */ 284extern char user[MAXNAMELEN];/* Our name for authenticating ourselves */ 285extern char passwd[MAXSECRETLEN]; /* Password for PAP or CHAP */ 286extern bool auth_required; /* Peer is required to authenticate */ 287extern bool persist; /* Reopen link after it goes down */ 288extern bool uselogin; /* Use /etc/passwd for checking PAP */ 289extern char our_name[MAXNAMELEN];/* Our name for authentication purposes */ 290extern char remote_name[MAXNAMELEN]; /* Peer's name for authentication */ 291extern bool explicit_remote;/* remote_name specified with remotename opt */ 292extern bool demand; /* Do dial-on-demand */ 293extern char *ipparam; /* Extra parameter for ip up/down scripts */ 294extern bool cryptpap; /* Others' PAP passwords are encrypted */ 295extern int idle_time_limit;/* Shut down link if idle for this long */ 296extern int holdoff; /* Dead time before restarting */ 297extern bool holdoff_specified; /* true if user gave a holdoff value */ 298extern bool notty; /* Stdin/out is not a tty */ 299extern char *pty_socket; /* Socket to connect to pty */ 300extern char *record_file; /* File to record chars sent/received */ 301extern bool sync_serial; /* Device is synchronous serial device */ 302extern int maxfail; /* Max # of unsuccessful connection attempts */ 303extern char linkname[MAXPATHLEN]; /* logical name for link */ 304extern bool tune_kernel; /* May alter kernel settings as necessary */ 305extern int connect_delay; /* Time to delay after connect script */ 306extern int max_data_rate; /* max bytes/sec through charshunt */ 307extern int req_unit; /* interface unit number to use */ 308extern bool multilink; /* enable multilink operation */ 309extern bool noendpoint; /* don't send or accept endpt. discrim. */ 310extern char *bundle_name; /* bundle name for multilink */ 311extern bool dump_options; /* print out option values */ 312extern bool dryrun; /* check everything, print options, exit */ 313 314#ifdef MAXOCTETS 315extern unsigned int maxoctets; /* Maximum octetes per session (in bytes) */ 316extern int maxoctets_dir; /* Direction : 317 0 - in+out (default) 318 1 - in 319 2 - out 320 3 - max(in,out) */ 321extern int maxoctets_timeout; /* Timeout for check of octets limit */ 322#define PPP_OCTETS_DIRECTION_SUM 0 323#define PPP_OCTETS_DIRECTION_IN 1 324#define PPP_OCTETS_DIRECTION_OUT 2 325#define PPP_OCTETS_DIRECTION_MAXOVERAL 3 326/* same as previos, but little different on RADIUS side */ 327#define PPP_OCTETS_DIRECTION_MAXSESSION 4 328#endif 329 330#ifdef PPP_FILTER 331extern struct bpf_program pass_filter; /* Filter for pkts to pass */ 332extern struct bpf_program active_filter; /* Filter for link-active pkts */ 333#endif 334 335#ifdef MSLANMAN 336extern bool ms_lanman; /* Use LanMan password instead of NT */ 337 /* Has meaning only with MS-CHAP challenges */ 338#endif 339 340/* Values for auth_pending, auth_done */ 341#define PAP_WITHPEER 0x1 342#define PAP_PEER 0x2 343#define CHAP_WITHPEER 0x4 344#define CHAP_PEER 0x8 345#define EAP_WITHPEER 0x10 346#define EAP_PEER 0x20 347 348/* Values for auth_done only */ 349#define CHAP_MD5_WITHPEER 0x40 350#define CHAP_MD5_PEER 0x80 351#ifdef CHAPMS 352#define CHAP_MS_SHIFT 8 /* LSB position for MS auths */ 353#define CHAP_MS_WITHPEER 0x100 354#define CHAP_MS_PEER 0x200 355#define CHAP_MS2_WITHPEER 0x400 356#define CHAP_MS2_PEER 0x800 357#endif 358 359extern char *current_option; /* the name of the option being parsed */ 360extern int privileged_option; /* set iff the current option came from root */ 361extern char *option_source; /* string saying where the option came from */ 362extern int option_priority; /* priority of current options */ 363 364/* 365 * Values for phase. 366 */ 367#define PHASE_DEAD 0 368#define PHASE_INITIALIZE 1 369#define PHASE_SERIALCONN 2 370#define PHASE_DORMANT 3 371#define PHASE_ESTABLISH 4 372#define PHASE_AUTHENTICATE 5 373#define PHASE_CALLBACK 6 374#define PHASE_NETWORK 7 375#define PHASE_RUNNING 8 376#define PHASE_TERMINATE 9 377#define PHASE_DISCONNECT 10 378#define PHASE_HOLDOFF 11 379 380/* 381 * The following struct gives the addresses of procedures to call 382 * for a particular protocol. 383 */ 384struct protent { 385 u_short protocol; /* PPP protocol number */ 386 /* Initialization procedure */ 387 void (*init) __P((int unit)); 388 /* Process a received packet */ 389 void (*input) __P((int unit, u_char *pkt, int len)); 390 /* Process a received protocol-reject */ 391 void (*protrej) __P((int unit)); 392 /* Lower layer has come up */ 393 void (*lowerup) __P((int unit)); 394 /* Lower layer has gone down */ 395 void (*lowerdown) __P((int unit)); 396 /* Open the protocol */ 397 void (*open) __P((int unit)); 398 /* Close the protocol */ 399 void (*close) __P((int unit, char *reason)); 400 /* Print a packet in readable form */ 401 int (*printpkt) __P((u_char *pkt, int len, 402 void (*printer) __P((void *, char *, ...)), 403 void *arg)); 404 /* Process a received data packet */ 405 void (*datainput) __P((int unit, u_char *pkt, int len)); 406 bool enabled_flag; /* 0 iff protocol is disabled */ 407 char *name; /* Text name of protocol */ 408 char *data_name; /* Text name of corresponding data protocol */ 409 option_t *options; /* List of command-line options */ 410 /* Check requested options, assign defaults */ 411 void (*check_options) __P((void)); 412 /* Configure interface for demand-dial */ 413 int (*demand_conf) __P((int unit)); 414 /* Say whether to bring up link for this pkt */ 415 int (*active_pkt) __P((u_char *pkt, int len)); 416}; 417 418/* Table of pointers to supported protocols */ 419extern struct protent *protocols[]; 420 421/* 422 * This struct contains pointers to a set of procedures for 423 * doing operations on a "channel". A channel provides a way 424 * to send and receive PPP packets - the canonical example is 425 * a serial port device in PPP line discipline (or equivalently 426 * with PPP STREAMS modules pushed onto it). 427 */ 428struct channel { 429 /* set of options for this channel */ 430 option_t *options; 431 /* find and process a per-channel options file */ 432 void (*process_extra_options) __P((void)); 433 /* check all the options that have been given */ 434 void (*check_options) __P((void)); 435 /* get the channel ready to do PPP, return a file descriptor */ 436 int (*connect) __P((void)); 437 /* we're finished with the channel */ 438 void (*disconnect) __P((void)); 439 /* put the channel into PPP `mode' */ 440 int (*establish_ppp) __P((int)); 441 /* take the channel out of PPP `mode', restore loopback if demand */ 442 void (*disestablish_ppp) __P((int)); 443 /* set the transmit-side PPP parameters of the channel */ 444 void (*send_config) __P((int, u_int32_t, int, int)); 445 /* set the receive-side PPP parameters of the channel */ 446 void (*recv_config) __P((int, u_int32_t, int, int)); 447 /* cleanup on error or normal exit */ 448 void (*cleanup) __P((void)); 449 /* close the device, called in children after fork */ 450 void (*close) __P((void)); 451}; 452 453extern struct channel *the_channel; 454 455/* 456 * Prototypes. 457 */ 458 459/* Procedures exported from main.c. */ 460void set_ifunit __P((int)); /* set stuff that depends on ifunit */ 461void detach __P((void)); /* Detach from controlling tty */ 462void die __P((int)); /* Cleanup and exit */ 463void quit __P((void)); /* like die(1) */ 464void novm __P((char *)); /* Say we ran out of memory, and die */ 465void timeout __P((void (*func)(void *), void *arg, int s, int us)); 466 /* Call func(arg) after s.us seconds */ 467void untimeout __P((void (*func)(void *), void *arg)); 468 /* Cancel call to func(arg) */ 469void record_child __P((int, char *, void (*) (void *), void *)); 470pid_t safe_fork __P((void)); /* Fork & close stuff in child */ 471int device_script __P((char *cmd, int in, int out, int dont_wait)); 472 /* Run `cmd' with given stdin and stdout */ 473pid_t run_program __P((char *prog, char **args, int must_exist, 474 void (*done)(void *), void *arg)); 475 /* Run program prog with args in child */ 476void reopen_log __P((void)); /* (re)open the connection to syslog */ 477void update_link_stats __P((int)); /* Get stats at link termination */ 478void script_setenv __P((char *, char *, int)); /* set script env var */ 479void script_unsetenv __P((char *)); /* unset script env var */ 480void new_phase __P((int)); /* signal start of new phase */ 481void add_notifier __P((struct notifier **, notify_func, void *)); 482void remove_notifier __P((struct notifier **, notify_func, void *)); 483void notify __P((struct notifier *, int)); 484int ppp_send_config __P((int, int, u_int32_t, int, int)); 485int ppp_recv_config __P((int, int, u_int32_t, int, int)); 486 487/* Procedures exported from tty.c. */ 488void tty_init __P((void)); 489 490/* Procedures exported from utils.c. */ 491void log_packet __P((u_char *, int, char *, int)); 492 /* Format a packet and log it with syslog */ 493void print_string __P((char *, int, void (*) (void *, char *, ...), 494 void *)); /* Format a string for output */ 495int slprintf __P((char *, int, char *, ...)); /* sprintf++ */ 496int vslprintf __P((char *, int, char *, va_list)); /* vsprintf++ */ 497size_t strlcpy __P((char *, const char *, size_t)); /* safe strcpy */ 498size_t strlcat __P((char *, const char *, size_t)); /* safe strncpy */ 499void dbglog __P((char *, ...)); /* log a debug message */ 500void info __P((char *, ...)); /* log an informational message */ 501void notice __P((char *, ...)); /* log a notice-level message */ 502void warn __P((char *, ...)); /* log a warning message */ 503void error __P((char *, ...)); /* log an error message */ 504void fatal __P((char *, ...)); /* log an error message and die(1) */ 505void init_pr_log __P((char *, int)); /* initialize for using pr_log */ 506void pr_log __P((void *, char *, ...)); /* printer fn, output to syslog */ 507void end_pr_log __P((void)); /* finish up after using pr_log */ 508void dump_packet __P((const char *, u_char *, int)); 509 /* dump packet to debug log if interesting */ 510ssize_t complete_read __P((int, void *, size_t)); 511 /* read a complete buffer */ 512 513/* Procedures exported from auth.c */ 514void link_required __P((int)); /* we are starting to use the link */ 515void link_terminated __P((int)); /* we are finished with the link */ 516void link_down __P((int)); /* the LCP layer has left the Opened state */ 517void link_established __P((int)); /* the link is up; authenticate now */ 518void start_networks __P((int)); /* start all the network control protos */ 519void continue_networks __P((int)); /* start network [ip, etc] control protos */ 520void np_up __P((int, int)); /* a network protocol has come up */ 521void np_down __P((int, int)); /* a network protocol has gone down */ 522void np_finished __P((int, int)); /* a network protocol no longer needs link */ 523void auth_peer_fail __P((int, int)); 524 /* peer failed to authenticate itself */ 525void auth_peer_success __P((int, int, int, char *, int)); 526 /* peer successfully authenticated itself */ 527void auth_withpeer_fail __P((int, int)); 528 /* we failed to authenticate ourselves */ 529void auth_withpeer_success __P((int, int, int)); 530 /* we successfully authenticated ourselves */ 531void auth_check_options __P((void)); 532 /* check authentication options supplied */ 533void auth_reset __P((int)); /* check what secrets we have */ 534int check_passwd __P((int, char *, int, char *, int, char **)); 535 /* Check peer-supplied username/password */ 536int get_secret __P((int, char *, char *, char *, int *, int)); 537 /* get "secret" for chap */ 538int get_srp_secret __P((int unit, char *client, char *server, char *secret, 539 int am_server)); 540int auth_ip_addr __P((int, u_int32_t)); 541 /* check if IP address is authorized */ 542int auth_number __P((void)); /* check if remote number is authorized */ 543int bad_ip_adrs __P((u_int32_t)); 544 /* check if IP address is unreasonable */ 545 546/* Procedures exported from demand.c */ 547void demand_conf __P((void)); /* config interface(s) for demand-dial */ 548void demand_block __P((void)); /* set all NPs to queue up packets */ 549void demand_unblock __P((void)); /* set all NPs to pass packets */ 550void demand_discard __P((void)); /* set all NPs to discard packets */ 551void demand_rexmit __P((int)); /* retransmit saved frames for an NP */ 552int loop_chars __P((unsigned char *, int)); /* process chars from loopback */ 553int loop_frame __P((unsigned char *, int)); /* should we bring link up? */ 554 555/* Procedures exported from multilink.c */ 556void mp_check_options __P((void)); /* Check multilink-related options */ 557int mp_join_bundle __P((void)); /* join our link to an appropriate bundle */ 558char *epdisc_to_str __P((struct epdisc *)); /* string from endpoint discrim. */ 559int str_to_epdisc __P((struct epdisc *, char *)); /* endpt disc. from str */ 560 561/* Procedures exported from sys-*.c */ 562void sys_init __P((void)); /* Do system-dependent initialization */ 563void sys_cleanup __P((void)); /* Restore system state before exiting */ 564int sys_check_options __P((void)); /* Check options specified */ 565void sys_close __P((void)); /* Clean up in a child before execing */ 566int ppp_available __P((void)); /* Test whether ppp kernel support exists */ 567int get_pty __P((int *, int *, char *, int)); /* Get pty master/slave */ 568int open_ppp_loopback __P((void)); /* Open loopback for demand-dialling */ 569int tty_establish_ppp __P((int)); /* Turn serial port into a ppp interface */ 570void tty_disestablish_ppp __P((int)); /* Restore port to normal operation */ 571void generic_disestablish_ppp __P((int dev_fd)); /* Restore device setting */ 572int generic_establish_ppp __P((int dev_fd)); /* Make a ppp interface */ 573void make_new_bundle __P((int, int, int, int)); /* Create new bundle */ 574int bundle_attach __P((int)); /* Attach link to existing bundle */ 575void cfg_bundle __P((int, int, int, int)); /* Configure existing bundle */ 576void clean_check __P((void)); /* Check if line was 8-bit clean */ 577void set_up_tty __P((int, int)); /* Set up port's speed, parameters, etc. */ 578void restore_tty __P((int)); /* Restore port's original parameters */ 579void setdtr __P((int, int)); /* Raise or lower port's DTR line */ 580void output __P((int, u_char *, int)); /* Output a PPP packet */ 581void wait_input __P((struct timeval *)); 582 /* Wait for input, with timeout */ 583void add_fd __P((int)); /* Add fd to set to wait for */ 584void remove_fd __P((int)); /* Remove fd from set to wait for */ 585int read_packet __P((u_char *)); /* Read PPP packet */ 586int get_loop_output __P((void)); /* Read pkts from loopback */ 587void tty_send_config __P((int, u_int32_t, int, int)); 588 /* Configure i/f transmit parameters */ 589void tty_set_xaccm __P((ext_accm)); 590 /* Set extended transmit ACCM */ 591void tty_recv_config __P((int, u_int32_t, int, int)); 592 /* Configure i/f receive parameters */ 593int ccp_test __P((int, u_char *, int, int)); 594 /* Test support for compression scheme */ 595void ccp_flags_set __P((int, int, int)); 596 /* Set kernel CCP state */ 597int ccp_fatal_error __P((int)); /* Test for fatal decomp error in kernel */ 598int get_idle_time __P((int, struct ppp_idle *)); 599 /* Find out how long link has been idle */ 600int get_ppp_stats __P((int, struct pppd_stats *)); 601 /* Return link statistics */ 602void netif_set_mtu __P((int, int)); /* Set PPP interface MTU */ 603int netif_get_mtu __P((int)); /* Get PPP interface MTU */ 604int sifvjcomp __P((int, int, int, int)); 605 /* Configure VJ TCP header compression */ 606int sifup __P((int)); /* Configure i/f up for one protocol */ 607int sifnpmode __P((int u, int proto, enum NPmode mode)); 608 /* Set mode for handling packets for proto */ 609int sifdown __P((int)); /* Configure i/f down for one protocol */ 610int sifaddr __P((int, u_int32_t, u_int32_t, u_int32_t)); 611 /* Configure IPv4 addresses for i/f */ 612int cifaddr __P((int, u_int32_t, u_int32_t)); 613 /* Reset i/f IP addresses */ 614#ifdef INET6 615int sif6addr __P((int, eui64_t, eui64_t)); 616 /* Configure IPv6 addresses for i/f */ 617int cif6addr __P((int, eui64_t, eui64_t)); 618 /* Remove an IPv6 address from i/f */ 619#endif 620int sifdefaultroute __P((int, u_int32_t, u_int32_t)); 621 /* Create default route through i/f */ 622int cifdefaultroute __P((int, u_int32_t, u_int32_t)); 623 /* Delete default route through i/f */ 624int sifproxyarp __P((int, u_int32_t)); 625 /* Add proxy ARP entry for peer */ 626int cifproxyarp __P((int, u_int32_t)); 627 /* Delete proxy ARP entry for peer */ 628u_int32_t GetMask __P((u_int32_t)); /* Get appropriate netmask for address */ 629int lock __P((char *)); /* Create lock file for device */ 630int relock __P((int)); /* Rewrite lock file with new pid */ 631void unlock __P((void)); /* Delete previously-created lock file */ 632void logwtmp __P((const char *, const char *, const char *)); 633 /* Write entry to wtmp file */ 634int get_host_seed __P((void)); /* Get host-dependent random number seed */ 635int have_route_to __P((u_int32_t)); /* Check if route to addr exists */ 636#ifdef PPP_FILTER 637int set_filters __P((struct bpf_program *pass, struct bpf_program *active)); 638 /* Set filter programs in kernel */ 639#endif 640#ifdef IPX_CHANGE 641int sipxfaddr __P((int, unsigned long, unsigned char *)); 642int cipxfaddr __P((int)); 643#endif 644int get_if_hwaddr __P((u_char *addr, char *name)); 645char *get_first_ethernet __P((void)); 646 647/* Procedures exported from options.c */ 648int setipaddr __P((char *, char **, int)); /* Set local/remote ip addresses */ 649int parse_args __P((int argc, char **argv)); 650 /* Parse options from arguments given */ 651int options_from_file __P((char *filename, int must_exist, int check_prot, 652 int privileged)); 653 /* Parse options from an options file */ 654int options_from_user __P((void)); /* Parse options from user's .ppprc */ 655int options_for_tty __P((void)); /* Parse options from /etc/ppp/options.tty */ 656int options_from_list __P((struct wordlist *, int privileged)); 657 /* Parse options from a wordlist */ 658int getword __P((FILE *f, char *word, int *newlinep, char *filename)); 659 /* Read a word from a file */ 660void option_error __P((char *fmt, ...)); 661 /* Print an error message about an option */ 662int int_option __P((char *, int *)); 663 /* Simplified number_option for decimal ints */ 664void add_options __P((option_t *)); /* Add extra options */ 665void check_options __P((void)); /* check values after all options parsed */ 666int override_value __P((const char *, int, const char *)); 667 /* override value if permitted by priority */ 668void print_options __P((void (*) __P((void *, char *, ...)), void *)); 669 /* print out values of all options */ 670 671int parse_dotted_ip __P((char *, u_int32_t *)); 672 673/* 674 * Hooks to enable plugins to change various things. 675 */ 676extern int (*new_phase_hook) __P((int)); 677extern int (*idle_time_hook) __P((struct ppp_idle *)); 678extern int (*holdoff_hook) __P((void)); 679extern int (*pap_check_hook) __P((void)); 680extern int (*pap_auth_hook) __P((char *user, char *passwd, char **msgp, 681 struct wordlist **paddrs, 682 struct wordlist **popts)); 683extern void (*pap_logout_hook) __P((void)); 684extern int (*pap_passwd_hook) __P((char *user, char *passwd)); 685extern int (*allowed_address_hook) __P((u_int32_t addr)); 686extern void (*ip_up_hook) __P((void)); 687extern void (*ip_down_hook) __P((void)); 688extern void (*ip_choose_hook) __P((u_int32_t *)); 689 690extern int (*chap_check_hook) __P((void)); 691extern int (*chap_passwd_hook) __P((char *user, char *passwd)); 692 693/* Let a plugin snoop sent and received packets. Useful for L2TP */ 694extern void (*snoop_recv_hook) __P((unsigned char *p, int len)); 695extern void (*snoop_send_hook) __P((unsigned char *p, int len)); 696 697/* 698 * Inline versions of get/put char/short/long. 699 * Pointer is advanced; we assume that both arguments 700 * are lvalues and will already be in registers. 701 * cp MUST be u_char *. 702 */ 703#define GETCHAR(c, cp) { \ 704 (c) = *(cp)++; \ 705} 706#define PUTCHAR(c, cp) { \ 707 *(cp)++ = (u_char) (c); \ 708} 709 710 711#define GETSHORT(s, cp) { \ 712 (s) = *(cp)++ << 8; \ 713 (s) |= *(cp)++; \ 714} 715#define PUTSHORT(s, cp) { \ 716 *(cp)++ = (u_char) ((s) >> 8); \ 717 *(cp)++ = (u_char) (s); \ 718} 719 720#define GETLONG(l, cp) { \ 721 (l) = *(cp)++ << 8; \ 722 (l) |= *(cp)++; (l) <<= 8; \ 723 (l) |= *(cp)++; (l) <<= 8; \ 724 (l) |= *(cp)++; \ 725} 726#define PUTLONG(l, cp) { \ 727 *(cp)++ = (u_char) ((l) >> 24); \ 728 *(cp)++ = (u_char) ((l) >> 16); \ 729 *(cp)++ = (u_char) ((l) >> 8); \ 730 *(cp)++ = (u_char) (l); \ 731} 732 733#define INCPTR(n, cp) ((cp) += (n)) 734#define DECPTR(n, cp) ((cp) -= (n)) 735 736/* 737 * System dependent definitions for user-level 4.3BSD UNIX implementation. 738 */ 739 740#define TIMEOUT(r, f, t) timeout((r), (f), (t), 0) 741#define UNTIMEOUT(r, f) untimeout((r), (f)) 742 743#define BCOPY(s, d, l) memcpy(d, s, l) 744#define BZERO(s, n) memset(s, 0, n) 745#define BCMP(s1, s2, l) memcmp(s1, s2, l) 746 747#define PRINTMSG(m, l) { info("Remote message: %0.*v", l, m); } 748 749/* 750 * MAKEHEADER - Add Header fields to a packet. 751 */ 752#define MAKEHEADER(p, t) { \ 753 PUTCHAR(PPP_ALLSTATIONS, p); \ 754 PUTCHAR(PPP_UI, p); \ 755 PUTSHORT(t, p); } 756 757/* 758 * Exit status values. 759 */ 760#define EXIT_OK 0 761#define EXIT_FATAL_ERROR 1 762#define EXIT_OPTION_ERROR 2 763#define EXIT_NOT_ROOT 3 764#define EXIT_NO_KERNEL_SUPPORT 4 765#define EXIT_USER_REQUEST 5 766#define EXIT_LOCK_FAILED 6 767#define EXIT_OPEN_FAILED 7 768#define EXIT_CONNECT_FAILED 8 769#define EXIT_PTYCMD_FAILED 9 770#define EXIT_NEGOTIATION_FAILED 10 771#define EXIT_PEER_AUTH_FAILED 11 772#define EXIT_IDLE_TIMEOUT 12 773#define EXIT_CONNECT_TIME 13 774#define EXIT_CALLBACK 14 775#define EXIT_PEER_DEAD 15 776#define EXIT_HANGUP 16 777#define EXIT_LOOPBACK 17 778#define EXIT_INIT_FAILED 18 779#define EXIT_AUTH_TOPEER_FAILED 19 780#ifdef MAXOCTETS 781#define EXIT_TRAFFIC_LIMIT 20 782#endif 783#define EXIT_CNID_AUTH_FAILED 21 784 785/* 786 * Debug macros. Slightly useful for finding bugs in pppd, not particularly 787 * useful for finding out why your connection isn't being established. 788 */ 789#ifdef DEBUGALL 790#define DEBUGMAIN 1 791#define DEBUGFSM 1 792#define DEBUGLCP 1 793#define DEBUGIPCP 1 794#define DEBUGIPV6CP 1 795#define DEBUGUPAP 1 796#define DEBUGCHAP 1 797#endif 798 799#ifndef LOG_PPP /* we use LOG_LOCAL2 for syslog by default */ 800#if defined(DEBUGMAIN) || defined(DEBUGFSM) || defined(DEBUGSYS) \ 801 || defined(DEBUGLCP) || defined(DEBUGIPCP) || defined(DEBUGUPAP) \ 802 || defined(DEBUGCHAP) || defined(DEBUG) || defined(DEBUGIPV6CP) 803#define LOG_PPP LOG_LOCAL2 804#else 805#define LOG_PPP LOG_DAEMON 806#endif 807#endif /* LOG_PPP */ 808 809#ifdef DEBUGMAIN 810#define MAINDEBUG(x) if (debug) dbglog x 811#else 812#define MAINDEBUG(x) 813#endif 814 815#ifdef DEBUGSYS 816#define SYSDEBUG(x) if (debug) dbglog x 817#else 818#define SYSDEBUG(x) 819#endif 820 821#ifdef DEBUGFSM 822#define FSMDEBUG(x) if (debug) dbglog x 823#else 824#define FSMDEBUG(x) 825#endif 826 827#ifdef DEBUGLCP 828#define LCPDEBUG(x) if (debug) dbglog x 829#else 830#define LCPDEBUG(x) 831#endif 832 833#ifdef DEBUGIPCP 834#define IPCPDEBUG(x) if (debug) dbglog x 835#else 836#define IPCPDEBUG(x) 837#endif 838 839#ifdef DEBUGIPV6CP 840#define IPV6CPDEBUG(x) if (debug) dbglog x 841#else 842#define IPV6CPDEBUG(x) 843#endif 844 845#ifdef DEBUGUPAP 846#define UPAPDEBUG(x) if (debug) dbglog x 847#else 848#define UPAPDEBUG(x) 849#endif 850 851#ifdef DEBUGCHAP 852#define CHAPDEBUG(x) if (debug) dbglog x 853#else 854#define CHAPDEBUG(x) 855#endif 856 857#ifdef DEBUGIPXCP 858#define IPXCPDEBUG(x) if (debug) dbglog x 859#else 860#define IPXCPDEBUG(x) 861#endif 862 863#ifndef SIGTYPE 864#if defined(sun) || defined(SYSV) || defined(POSIX_SOURCE) 865#define SIGTYPE void 866#else 867#define SIGTYPE int 868#endif /* defined(sun) || defined(SYSV) || defined(POSIX_SOURCE) */ 869#endif /* SIGTYPE */ 870 871#ifndef MIN 872#define MIN(a, b) ((a) < (b)? (a): (b)) 873#endif 874#ifndef MAX 875#define MAX(a, b) ((a) > (b)? (a): (b)) 876#endif 877 878#ifndef offsetof 879#define offsetof(type, member) ((size_t) &((type *)0)->member) 880#endif 881 882#endif /* __PPP_H__ */ 883