release/src/router/ppp/pppd/pppd.h

   1 /*
   2  * pppd.h - PPP daemon global declarations.
   3  *
   4  * Copyright (c) 1989 Carnegie Mellon University.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms are permitted
   8  * provided that the above copyright notice and this paragraph are
   9  * duplicated in all such forms and that any documentation,
  10  * advertising materials, and other materials related to such
  11  * distribution and use acknowledge that the software was developed
  12  * by Carnegie Mellon University.  The name of the
  13  * University may not be used to endorse or promote products derived
  14  * from this software without specific prior written permission.
  15  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  17  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  18  *
  19  * $Id: pppd.h,v 1.1.1.4 2003/10/14 08:09:53 sparq Exp $
  20  */
  21
  22 /*
  23  * TODO:
  24  */
  25
  26 #ifndef __PPPD_H__
  27 #define __PPPD_H__
  28
  29 #include <stdio.h>              /* for FILE */
  30 #include <limits.h>             /* for NGROUPS_MAX */
  31 #include <sys/param.h>          /* for MAXPATHLEN and BSD4_4, if defined */
  32 #include <sys/types.h>          /* for u_int32_t, if defined */
  33 #include <sys/time.h>           /* for struct timeval */
  34 #include <net/ppp_defs.h>
  35 #include "patchlevel.h"
  36
  37 #if defined(__STDC__)
  38 #include <stdarg.h>
  39 #define __V(x)  x
  40 #else
  41 #include <varargs.h>
  42 #define __V(x)  (va_alist) va_dcl
  43 #define const
  44 #define volatile
  45 #endif
  46
  47 #ifdef INET6
  48 #include "eui64.h"
  49 #endif
  50
  51 /*
  52  * Limits.
  53  */
  54
  55 #define NUM_PPP         1       /* One PPP interface supported (per process) */
  56 #define MAXWORDLEN      1024    /* max length of word in file (incl null) */
  57 #define MAXARGS         1       /* max # args to a command */
  58 #define MAXNAMELEN      256     /* max length of hostname or name for auth */
  59 #define MAXSECRETLEN    256     /* max length of password or secret */
  60
  61 /*
  62  * Option descriptor structure.
  63  */
  64
  65 typedef unsigned char   bool;
  66
  67 enum opt_type {
  68         o_special_noarg = 0,
  69         o_special = 1,
  70         o_bool,
  71         o_int,
  72         o_uint32,
  73         o_string,
  74         o_wild,
  75 };
  76
  77 typedef struct {
  78         char    *name;          /* name of the option */
  79         enum opt_type type;
  80         void    *addr;
  81         char    *description;
  82         int     flags;
  83         void    *addr2;
  84         int     upper_limit;
  85         int     lower_limit;
  86         const char *source;
  87         short int priority;
  88         short int winner;
  89 } option_t;
  90
  91 /* Values for flags */
  92 #define OPT_VALUE       0xff    /* mask for presupplied value */
  93 #define OPT_HEX         0x100   /* int option is in hex */
  94 #define OPT_NOARG       0x200   /* option doesn't take argument */
  95 #define OPT_OR          0x400   /* OR in argument to value */
  96 #define OPT_INC         0x800   /* increment value */
  97 #define OPT_PRIV        0x1000  /* privileged option */
  98 #define OPT_STATIC      0x2000  /* string option goes into static array */
  99 #define OPT_LLIMIT      0x4000  /* check value against lower limit */
 100 #define OPT_ULIMIT      0x8000  /* check value against upper limit */
 101 #define OPT_LIMITS      (OPT_LLIMIT|OPT_ULIMIT)
 102 #define OPT_ZEROOK      0x10000 /* 0 value is OK even if not within limits */
 103 #define OPT_HIDE        0x10000 /* for o_string, print value as ?????? */
 104 #define OPT_A2LIST      0x10000 /* for o_special, keep list of values */
 105 #define OPT_NOINCR      0x20000 /* value mustn't be increased */
 106 #define OPT_ZEROINF     0x40000 /* with OPT_NOINCR, 0 == infinity */
 107 #define OPT_PRIO        0x80000 /* process option priorities for this option */
 108 #define OPT_PRIOSUB     0x100000 /* subsidiary member of priority group */
 109 #define OPT_ALIAS       0x200000 /* option is alias for previous option */
 110 #define OPT_A2COPY      0x400000 /* addr2 -> second location to rcv value */
 111 #define OPT_ENABLE      0x800000 /* use *addr2 as enable for option */
 112 #define OPT_A2CLR       0x1000000 /* clear *(bool *)addr2 */
 113 #define OPT_PRIVFIX     0x2000000 /* user can't override if set by root */
 114 #define OPT_INITONLY    0x4000000 /* option can only be set in init phase */
 115 #define OPT_DEVEQUIV    0x8000000 /* equiv to device name */
 116 #define OPT_DEVNAM      (OPT_INITONLY | OPT_DEVEQUIV)
 117 #define OPT_A2PRINTER   0x10000000 /* *addr2 is a fn for printing option */
 118 #define OPT_A2STRVAL    0x20000000 /* *addr2 points to current string value */
 119 #define OPT_NOPRINT     0x40000000 /* don't print this option at all */
 120
 121 #define OPT_VAL(x)      ((x) & OPT_VALUE)
 122
 123 /* Values for priority */
 124 #define OPRIO_DEFAULT   0       /* a default value */
 125 #define OPRIO_CFGFILE   1       /* value from a configuration file */
 126 #define OPRIO_CMDLINE   2       /* value from the command line */
 127 #define OPRIO_SECFILE   3       /* value from options in a secrets file */
 128 #define OPRIO_ROOT      100     /* added to priority if OPT_PRIVFIX && root */
 129
 130 #ifndef GIDSET_TYPE
 131 #define GIDSET_TYPE     gid_t
 132 #endif
 133
 134 /* Structure representing a list of permitted IP addresses. */
 135 struct permitted_ip {
 136     int         permit;         /* 1 = permit, 0 = forbid */
 137     u_int32_t   base;           /* match if (addr & mask) == base */
 138     u_int32_t   mask;           /* base and mask are in network byte order */
 139 };
 140
 141 /*
 142  * Unfortunately, the linux kernel driver uses a different structure
 143  * for statistics from the rest of the ports.
 144  * This structure serves as a common representation for the bits
 145  * pppd needs.
 146  */
 147 struct pppd_stats {
 148     unsigned int        bytes_in;
 149     unsigned int        bytes_out;
 150 };
 151
 152 /* Used for storing a sequence of words.  Usually malloced. */
 153 struct wordlist {
 154     struct wordlist     *next;
 155     char                *word;
 156 };
 157
 158 /* An endpoint discriminator, used with multilink. */
 159 #define MAX_ENDP_LEN    20      /* maximum length of discriminator value */
 160 struct epdisc {
 161     unsigned char       class;
 162     unsigned char       length;
 163     unsigned char       value[MAX_ENDP_LEN];
 164 };
 165
 166 /* values for epdisc.class */
 167 #define EPD_NULL        0       /* null discriminator, no data */
 168 #define EPD_LOCAL       1
 169 #define EPD_IP          2
 170 #define EPD_MAC         3
 171 #define EPD_MAGIC       4
 172 #define EPD_PHONENUM    5
 173
 174 typedef void (*notify_func) __P((void *, int));
 175
 176 struct notifier {
 177     struct notifier *next;
 178     notify_func     func;
 179     void            *arg;
 180 };
 181
 182 /*
 183  * Global variables.
 184  */
 185
 186 extern int      hungup;         /* Physical layer has disconnected */
 187 extern int      ifunit;         /* Interface unit number */
 188 extern char     ifname[];       /* Interface name */
 189 extern char     hostname[];     /* Our hostname */
 190 extern u_char   outpacket_buf[]; /* Buffer for outgoing packets */
 191 extern int      phase;          /* Current state of link - see values below */
 192 extern int      baud_rate;      /* Current link speed in bits/sec */
 193 extern char     *progname;      /* Name of this program */
 194 extern int      redirect_stderr;/* Connector's stderr should go to file */
 195 extern char     peer_authname[];/* Authenticated name of peer */
 196 extern int      privileged;     /* We were run by real-uid root */
 197 extern int      need_holdoff;   /* Need holdoff period after link terminates */
 198 extern char     **script_env;   /* Environment variables for scripts */
 199 extern int      detached;       /* Have detached from controlling tty */
 200 extern GIDSET_TYPE groups[NGROUPS_MAX]; /* groups the user is in */
 201 extern int      ngroups;        /* How many groups valid in groups */
 202 extern struct pppd_stats link_stats; /* byte/packet counts etc. for link */
 203 extern int      link_stats_valid; /* set if link_stats is valid */
 204 extern int      link_connect_time; /* time the link was up for */
 205 extern int      using_pty;      /* using pty as device (notty or pty opt.) */
 206 extern int      log_to_fd;      /* logging to this fd as well as syslog */
 207 extern bool     log_default;    /* log_to_fd is default (stdout) */
 208 extern char     *no_ppp_msg;    /* message to print if ppp not in kernel */
 209 extern volatile int status;     /* exit status for pppd */
 210 extern bool     devnam_fixed;   /* can no longer change devnam */
 211 extern int      unsuccess;      /* # unsuccessful connection attempts */
 212 extern int      do_callback;    /* set if we want to do callback next */
 213 extern int      doing_callback; /* set if this is a callback */
 214 extern char     ppp_devnam[MAXPATHLEN];
 215 extern struct notifier *pidchange;   /* for notifications of pid changing */
 216 extern struct notifier *phasechange; /* for notifications of phase changes */
 217 extern struct notifier *exitnotify;  /* for notification that we're exiting */
 218 extern struct notifier *sigreceived; /* notification of received signal */
 219 extern int      listen_time;    /* time to listen first (ms) */
 220
 221 /* Values for do_callback and doing_callback */
 222 #define CALLBACK_DIALIN         1       /* we are expecting the call back */
 223 #define CALLBACK_DIALOUT        2       /* we are dialling out to call back */
 224
 225 /*
 226  * Variables set by command-line options.
 227  */
 228
 229 extern int      debug;          /* Debug flag */
 230 extern int      kdebugflag;     /* Tell kernel to print debug messages */
 231 extern int      default_device; /* Using /dev/tty or equivalent */
 232 extern char     devnam[MAXPATHLEN];     /* Device name */
 233 extern int      crtscts;        /* Use hardware flow control */
 234 extern bool     modem;          /* Use modem control lines */
 235 extern int      inspeed;        /* Input/Output speed requested */
 236 extern u_int32_t netmask;       /* IP netmask to set on interface */
 237 extern bool     lockflag;       /* Create lock file to lock the serial dev */
 238 extern bool     nodetach;       /* Don't detach from controlling tty */
 239 extern bool     updetach;       /* Detach from controlling tty when link up */
 240 extern char     *initializer;   /* Script to initialize physical link */
 241 extern char     *connect_script; /* Script to establish physical link */
 242 extern char     *disconnect_script; /* Script to disestablish physical link */
 243 extern char     *welcomer;      /* Script to welcome client after connection */
 244 extern char     *ptycommand;    /* Command to run on other side of pty */
 245 extern int      maxconnect;     /* Maximum connect time (seconds) */
 246 extern char     user[MAXNAMELEN];/* Our name for authenticating ourselves */
 247 extern char     passwd[MAXSECRETLEN];   /* Password for PAP or CHAP */
 248 extern bool     auth_required;  /* Peer is required to authenticate */
 249 extern bool     persist;        /* Reopen link after it goes down */
 250 extern bool     uselogin;       /* Use /etc/passwd for checking PAP */
 251 extern char     our_name[MAXNAMELEN];/* Our name for authentication purposes */
 252 extern char     remote_name[MAXNAMELEN]; /* Peer's name for authentication */
 253 extern bool     explicit_remote;/* remote_name specified with remotename opt */
 254 extern bool     demand;         /* Do dial-on-demand */
 255 extern char     *ipparam;       /* Extra parameter for ip up/down scripts */
 256 extern bool     cryptpap;       /* Others' PAP passwords are encrypted */
 257 extern int      idle_time_limit;/* Shut down link if idle for this long */
 258 extern int      holdoff;        /* Dead time before restarting */
 259 extern bool     holdoff_specified; /* true if user gave a holdoff value */
 260 extern bool     notty;          /* Stdin/out is not a tty */
 261 extern char     *pty_socket;    /* Socket to connect to pty */
 262 extern char     *record_file;   /* File to record chars sent/received */
 263 extern bool     sync_serial;    /* Device is synchronous serial device */
 264 extern int      maxfail;        /* Max # of unsuccessful connection attempts */
 265 extern char     linkname[MAXPATHLEN]; /* logical name for link */
 266 extern bool     tune_kernel;    /* May alter kernel settings as necessary */
 267 extern int      connect_delay;  /* Time to delay after connect script */
 268 extern int      max_data_rate;  /* max bytes/sec through charshunt */
 269 extern int      req_unit;       /* interface unit number to use */
 270 extern bool     multilink;      /* enable multilink operation */
 271 extern bool     noendpoint;     /* don't send or accept endpt. discrim. */
 272 extern char     *bundle_name;   /* bundle name for multilink */
 273 extern bool     dump_options;   /* print out option values */
 274 extern bool     dryrun;         /* check everything, print options, exit */
 275
 276 #ifdef PPP_FILTER
 277 extern struct   bpf_program pass_filter;   /* Filter for pkts to pass */
 278 extern struct   bpf_program active_filter; /* Filter for link-active pkts */
 279 #endif
 280
 281 #ifdef MSLANMAN
 282 extern bool     ms_lanman;      /* Use LanMan password instead of NT */
 283                                 /* Has meaning only with MS-CHAP challenges */
 284 #endif
 285
 286 extern char *current_option;    /* the name of the option being parsed */
 287 extern int  privileged_option;  /* set iff the current option came from root */
 288 extern char *option_source;     /* string saying where the option came from */
 289 extern int  option_priority;    /* priority of current options */
 290
 291 /*
 292  * Values for phase.
 293  */
 294 #define PHASE_DEAD              0
 295 #define PHASE_INITIALIZE        1
 296 #define PHASE_SERIALCONN        2
 297 #define PHASE_DORMANT           3
 298 #define PHASE_ESTABLISH         4
 299 #define PHASE_AUTHENTICATE      5
 300 #define PHASE_CALLBACK          6
 301 #define PHASE_NETWORK           7
 302 #define PHASE_RUNNING           8
 303 #define PHASE_TERMINATE         9
 304 #define PHASE_DISCONNECT        10
 305 #define PHASE_HOLDOFF           11
 306
 307 /*
 308  * The following struct gives the addresses of procedures to call
 309  * for a particular protocol.
 310  */
 311 struct protent {
 312     u_short protocol;           /* PPP protocol number */
 313     /* Initialization procedure */
 314     void (*init) __P((int unit));
 315     /* Process a received packet */
 316     void (*input) __P((int unit, u_char *pkt, int len));
 317     /* Process a received protocol-reject */
 318     void (*protrej) __P((int unit));
 319     /* Lower layer has come up */
 320     void (*lowerup) __P((int unit));
 321     /* Lower layer has gone down */
 322     void (*lowerdown) __P((int unit));
 323     /* Open the protocol */
 324     void (*open) __P((int unit));
 325     /* Close the protocol */
 326     void (*close) __P((int unit, char *reason));
 327     /* Print a packet in readable form */
 328     int  (*printpkt) __P((u_char *pkt, int len,
 329                           void (*printer) __P((void *, char *, ...)),
 330                           void *arg));
 331     /* Process a received data packet */
 332     void (*datainput) __P((int unit, u_char *pkt, int len));
 333     bool enabled_flag;          /* 0 iff protocol is disabled */
 334     char *name;                 /* Text name of protocol */
 335     char *data_name;            /* Text name of corresponding data protocol */
 336     option_t *options;          /* List of command-line options */
 337     /* Check requested options, assign defaults */
 338     void (*check_options) __P((void));
 339     /* Configure interface for demand-dial */
 340     int  (*demand_conf) __P((int unit));
 341     /* Say whether to bring up link for this pkt */
 342     int  (*active_pkt) __P((u_char *pkt, int len));
 343 };
 344
 345 /* Table of pointers to supported protocols */
 346 extern struct protent *protocols[];
 347
 348 /*
 349  * This struct contains pointers to a set of procedures for
 350  * doing operations on a "channel".  A channel provides a way
 351  * to send and receive PPP packets - the canonical example is
 352  * a serial port device in PPP line discipline (or equivalently
 353  * with PPP STREAMS modules pushed onto it).
 354  */
 355 struct channel {
 356         /* set of options for this channel */
 357         option_t *options;
 358         /* find and process a per-channel options file */
 359         void (*process_extra_options) __P((void));
 360         /* check all the options that have been given */
 361         void (*check_options) __P((void));
 362         /* get the channel ready to do PPP, return a file descriptor */
 363         int  (*connect) __P((void));
 364         /* we're finished with the channel */
 365         void (*disconnect) __P((void));
 366         /* put the channel into PPP `mode' */
 367         int  (*establish_ppp) __P((int));
 368         /* take the channel out of PPP `mode', restore loopback if demand */
 369         void (*disestablish_ppp) __P((int));
 370         /* set the transmit-side PPP parameters of the channel */
 371         void (*send_config) __P((int, u_int32_t, int, int));
 372         /* set the receive-side PPP parameters of the channel */
 373         void (*recv_config) __P((int, u_int32_t, int, int));
 374         /* cleanup on error or normal exit */
 375         void (*cleanup) __P((void));
 376         /* close the device, called in children after fork */
 377         void (*close) __P((void));
 378 };
 379
 380 extern struct channel *the_channel;
 381
 382 #define ppp_send_config(unit, mtu, accm, pc, acc)                        \
 383 do {                                                                     \
 384         if (the_channel->send_config)                                    \
 385                 (*the_channel->send_config)((mtu), (accm), (pc), (acc)); \
 386 } while (0)
 387
 388 #define ppp_recv_config(unit, mtu, accm, pc, acc)                        \
 389 do {                                                                     \
 390         if (the_channel->send_config)                                    \
 391                 (*the_channel->recv_config)((mtu), (accm), (pc), (acc)); \
 392 } while (0)
 393
 394 /*
 395  * Prototypes.
 396  */
 397
 398 /* Procedures exported from main.c. */
 399 void set_ifunit __P((int));     /* set stuff that depends on ifunit */
 400 void detach __P((void));        /* Detach from controlling tty */
 401 void die __P((int));            /* Cleanup and exit */
 402 void quit __P((void));          /* like die(1) */
 403 void novm __P((char *));        /* Say we ran out of memory, and die */
 404 void timeout __P((void (*func)(void *), void *arg, int s, int us));
 405                                 /* Call func(arg) after s.us seconds */
 406 void untimeout __P((void (*func)(void *), void *arg));
 407                                 /* Cancel call to func(arg) */
 408 void record_child __P((int, char *, void (*) (void *), void *));
 409 int  device_script __P((char *cmd, int in, int out, int dont_wait));
 410                                 /* Run `cmd' with given stdin and stdout */
 411 pid_t run_program __P((char *prog, char **args, int must_exist,
 412                        void (*done)(void *), void *arg));
 413                                 /* Run program prog with args in child */
 414 void reopen_log __P((void));    /* (re)open the connection to syslog */
 415 void update_link_stats __P((int)); /* Get stats at link termination */
 416 void script_setenv __P((char *, char *, int));  /* set script env var */
 417 void script_unsetenv __P((char *));             /* unset script env var */
 418 void new_phase __P((int));      /* signal start of new phase */
 419 void add_notifier __P((struct notifier **, notify_func, void *));
 420 void remove_notifier __P((struct notifier **, notify_func, void *));
 421 void notify __P((struct notifier *, int));
 422
 423 /* Procedures exported from tty.c. */
 424 void tty_init __P((void));
 425
 426 /* Procedures exported from utils.c. */
 427 void log_packet __P((u_char *, int, char *, int));
 428                                 /* Format a packet and log it with syslog */
 429 void print_string __P((char *, int,  void (*) (void *, char *, ...),
 430                 void *));       /* Format a string for output */
 431 int slprintf __P((char *, int, char *, ...));           /* sprintf++ */
 432 int vslprintf __P((char *, int, char *, va_list));      /* vsprintf++ */
 433 size_t strlcpy __P((char *, const char *, size_t));     /* safe strcpy */
 434 size_t strlcat __P((char *, const char *, size_t));     /* safe strncpy */
 435 void dbglog __P((char *, ...)); /* log a debug message */
 436 void info __P((char *, ...));   /* log an informational message */
 437 void notice __P((char *, ...)); /* log a notice-level message */
 438 void warn __P((char *, ...));   /* log a warning message */
 439 void error __P((char *, ...));  /* log an error message */
 440 void fatal __P((char *, ...));  /* log an error message and die(1) */
 441 void init_pr_log __P((char *, int));    /* initialize for using pr_log */
 442 void pr_log __P((void *, char *, ...)); /* printer fn, output to syslog */
 443 void end_pr_log __P((void));    /* finish up after using pr_log */
 444
 445 /* Procedures exported from auth.c */
 446 void link_required __P((int));    /* we are starting to use the link */
 447 void link_terminated __P((int));  /* we are finished with the link */
 448 void link_down __P((int));        /* the LCP layer has left the Opened state */
 449 void link_established __P((int)); /* the link is up; authenticate now */
 450 void start_networks __P((void));  /* start all the network control protos */
 451 void np_up __P((int, int));       /* a network protocol has come up */
 452 void np_down __P((int, int));     /* a network protocol has gone down */
 453 void np_finished __P((int, int)); /* a network protocol no longer needs link */
 454 void auth_peer_fail __P((int, int));
 455                                 /* peer failed to authenticate itself */
 456 void auth_peer_success __P((int, int, char *, int));
 457                                 /* peer successfully authenticated itself */
 458 void auth_withpeer_fail __P((int, int));
 459                                 /* we failed to authenticate ourselves */
 460 void auth_withpeer_success __P((int, int));
 461                                 /* we successfully authenticated ourselves */
 462 void auth_check_options __P((void));
 463                                 /* check authentication options supplied */
 464 void auth_reset __P((int));     /* check what secrets we have */
 465 int  check_passwd __P((int, char *, int, char *, int, char **));
 466                                 /* Check peer-supplied username/password */
 467 int  get_secret __P((int, char *, char *, char *, int *, int));
 468                                 /* get "secret" for chap */
 469 int  auth_ip_addr __P((int, u_int32_t));
 470                                 /* check if IP address is authorized */
 471 int  bad_ip_adrs __P((u_int32_t));
 472                                 /* check if IP address is unreasonable */
 473
 474 /* Procedures exported from demand.c */
 475 void demand_conf __P((void));   /* config interface(s) for demand-dial */
 476 void demand_block __P((void));  /* set all NPs to queue up packets */
 477 void demand_unblock __P((void)); /* set all NPs to pass packets */
 478 void demand_discard __P((void)); /* set all NPs to discard packets */
 479 void demand_rexmit __P((int));  /* retransmit saved frames for an NP */
 480 int  loop_chars __P((unsigned char *, int)); /* process chars from loopback */
 481 int  loop_frame __P((unsigned char *, int)); /* should we bring link up? */
 482
 483 /* Procedures exported from multilink.c */
 484 void mp_check_options __P((void)); /* Check multilink-related options */
 485 int  mp_join_bundle __P((void));  /* join our link to an appropriate bundle */
 486 char *epdisc_to_str __P((struct epdisc *)); /* string from endpoint discrim. */
 487 int  str_to_epdisc __P((struct epdisc *, char *)); /* endpt disc. from str */
 488
 489 /* Procedures exported from sys-*.c */
 490 void sys_init __P((void));      /* Do system-dependent initialization */
 491 void sys_cleanup __P((void));   /* Restore system state before exiting */
 492 int  sys_check_options __P((void)); /* Check options specified */
 493 void sys_close __P((void));     /* Clean up in a child before execing */
 494 int  ppp_available __P((void)); /* Test whether ppp kernel support exists */
 495 int  get_pty __P((int *, int *, char *, int));  /* Get pty master/slave */
 496 int  open_ppp_loopback __P((void)); /* Open loopback for demand-dialling */
 497 int  tty_establish_ppp __P((int));  /* Turn serial port into a ppp interface */
 498 void tty_disestablish_ppp __P((int)); /* Restore port to normal operation */
 499 void generic_disestablish_ppp __P((int dev_fd)); /* Restore device setting */
 500 int  generic_establish_ppp __P((int dev_fd)); /* Make a ppp interface */
 501 void make_new_bundle __P((int, int, int, int)); /* Create new bundle */
 502 int  bundle_attach __P((int));  /* Attach link to existing bundle */
 503 void cfg_bundle __P((int, int, int, int)); /* Configure existing bundle */
 504 void clean_check __P((void));   /* Check if line was 8-bit clean */
 505 void set_up_tty __P((int, int)); /* Set up port's speed, parameters, etc. */
 506 void restore_tty __P((int));    /* Restore port's original parameters */
 507 void setdtr __P((int, int));    /* Raise or lower port's DTR line */
 508 void output __P((int, u_char *, int)); /* Output a PPP packet */
 509 void wait_input __P((struct timeval *));
 510                                 /* Wait for input, with timeout */
 511 void add_fd __P((int));         /* Add fd to set to wait for */
 512 void remove_fd __P((int));      /* Remove fd from set to wait for */
 513 int  read_packet __P((u_char *)); /* Read PPP packet */
 514 int  get_loop_output __P((void)); /* Read pkts from loopback */
 515 void tty_send_config __P((int, u_int32_t, int, int));
 516                                 /* Configure i/f transmit parameters */
 517 void tty_set_xaccm __P((ext_accm));
 518                                 /* Set extended transmit ACCM */
 519 void tty_recv_config __P((int, u_int32_t, int, int));
 520                                 /* Configure i/f receive parameters */
 521 int  ccp_test __P((int, u_char *, int, int));
 522                                 /* Test support for compression scheme */
 523 void ccp_flags_set __P((int, int, int));
 524                                 /* Set kernel CCP state */
 525 int  ccp_fatal_error __P((int)); /* Test for fatal decomp error in kernel */
 526 int  get_idle_time __P((int, struct ppp_idle *));
 527                                 /* Find out how long link has been idle */
 528 int  get_ppp_stats __P((int, struct pppd_stats *));
 529                                 /* Return link statistics */
 530 void netif_set_mtu __P((int, int)); /* Set PPP interface MTU */
 531 int  sifvjcomp __P((int, int, int, int));
 532                                 /* Configure VJ TCP header compression */
 533 int  sifup __P((int));          /* Configure i/f up for one protocol */
 534 int  sifnpmode __P((int u, int proto, enum NPmode mode));
 535                                 /* Set mode for handling packets for proto */
 536 int  sifdown __P((int));        /* Configure i/f down for one protocol */
 537 int  sifaddr __P((int, u_int32_t, u_int32_t, u_int32_t));
 538                                 /* Configure IPv4 addresses for i/f */
 539 int  cifaddr __P((int, u_int32_t, u_int32_t));
 540                                 /* Reset i/f IP addresses */
 541 #ifdef INET6
 542 int  sif6addr __P((int, eui64_t, eui64_t));
 543                                 /* Configure IPv6 addresses for i/f */
 544 int  cif6addr __P((int, eui64_t, eui64_t));
 545                                 /* Remove an IPv6 address from i/f */
 546 #endif
 547 int  sifdefaultroute __P((int, u_int32_t, u_int32_t));
 548                                 /* Create default route through i/f */
 549 int  cifdefaultroute __P((int, u_int32_t, u_int32_t));
 550                                 /* Delete default route through i/f */
 551 int  sifproxyarp __P((int, u_int32_t));
 552                                 /* Add proxy ARP entry for peer */
 553 int  cifproxyarp __P((int, u_int32_t));
 554                                 /* Delete proxy ARP entry for peer */
 555 u_int32_t GetMask __P((u_int32_t)); /* Get appropriate netmask for address */
 556 int  lock __P((char *));        /* Create lock file for device */
 557 int  relock __P((int));         /* Rewrite lock file with new pid */
 558 void unlock __P((void));        /* Delete previously-created lock file */
 559 void logwtmp __P((const char *, const char *, const char *));
 560                                 /* Write entry to wtmp file */
 561 int  get_host_seed __P((void)); /* Get host-dependent random number seed */
 562 int  have_route_to __P((u_int32_t)); /* Check if route to addr exists */
 563 #ifdef PPP_FILTER
 564 int  set_filters __P((struct bpf_program *pass, struct bpf_program *active));
 565                                 /* Set filter programs in kernel */
 566 #endif
 567 #ifdef IPX_CHANGE
 568 int  sipxfaddr __P((int, unsigned long, unsigned char *));
 569 int  cipxfaddr __P((int));
 570 #endif
 571 int  get_if_hwaddr __P((u_char *addr, char *name));
 572 char *get_first_ethernet __P((void));
 573
 574 /* Procedures exported from options.c */
 575 int  parse_args __P((int argc, char **argv));
 576                                 /* Parse options from arguments given */
 577 int  options_from_file __P((char *filename, int must_exist, int check_prot,
 578                             int privileged));
 579                                 /* Parse options from an options file */
 580 int  options_from_user __P((void)); /* Parse options from user's .ppprc */
 581 int  options_for_tty __P((void)); /* Parse options from /etc/ppp/options.tty */
 582 int  options_from_list __P((struct wordlist *, int privileged));
 583                                 /* Parse options from a wordlist */
 584 int  getword __P((FILE *f, char *word, int *newlinep, char *filename));
 585                                 /* Read a word from a file */
 586 void option_error __P((char *fmt, ...));
 587                                 /* Print an error message about an option */
 588 int int_option __P((char *, int *));
 589                                 /* Simplified number_option for decimal ints */
 590 void add_options __P((option_t *)); /* Add extra options */
 591 void check_options __P((void)); /* check values after all options parsed */
 592 int remove_option __P((char *)); /* Disable the specified option */
 593 int  override_value __P((const char *, int, const char *));
 594                                 /* override value if permitted by priority */
 595 void print_options __P((void (*) __P((void *, char *, ...)), void *));
 596                                 /* print out values of all options */
 597
 598 int parse_dotted_ip __P((char *, u_int32_t *));
 599
 600 /*
 601  * Hooks to enable plugins to change various things.
 602  */
 603 extern int (*new_phase_hook) __P((int));
 604 extern int (*idle_time_hook) __P((struct ppp_idle *));
 605 extern int (*holdoff_hook) __P((void));
 606 extern int (*pap_check_hook) __P((void));
 607 extern int (*pap_auth_hook) __P((char *user, char *passwd, char **msgp,
 608                                  struct wordlist **paddrs,
 609                                  struct wordlist **popts));
 610 extern void (*pap_logout_hook) __P((void));
 611 extern int (*pap_passwd_hook) __P((char *user, char *passwd));
 612 extern void (*ip_up_hook) __P((void));
 613 extern void (*ip_down_hook) __P((void));
 614 extern void (*ip_choose_hook) __P((u_int32_t *));
 615
 616 /*
 617  * Inline versions of get/put char/short/long.
 618  * Pointer is advanced; we assume that both arguments
 619  * are lvalues and will already be in registers.
 620  * cp MUST be u_char *.
 621  */
 622 #define GETCHAR(c, cp) { \
 623         (c) = *(cp)++; \
 624 }
 625 #define PUTCHAR(c, cp) { \
 626         *(cp)++ = (u_char) (c); \
 627 }
 628
 629
 630 #define GETSHORT(s, cp) { \
 631         (s) = *(cp)++ << 8; \
 632         (s) |= *(cp)++; \
 633 }
 634 #define PUTSHORT(s, cp) { \
 635         *(cp)++ = (u_char) ((s) >> 8); \
 636         *(cp)++ = (u_char) (s); \
 637 }
 638
 639 #define GETLONG(l, cp) { \
 640         (l) = *(cp)++ << 8; \
 641         (l) |= *(cp)++; (l) <<= 8; \
 642         (l) |= *(cp)++; (l) <<= 8; \
 643         (l) |= *(cp)++; \
 644 }
 645 #define PUTLONG(l, cp) { \
 646         *(cp)++ = (u_char) ((l) >> 24); \
 647         *(cp)++ = (u_char) ((l) >> 16); \
 648         *(cp)++ = (u_char) ((l) >> 8); \
 649         *(cp)++ = (u_char) (l); \
 650 }
 651
 652 #define INCPTR(n, cp)   ((cp) += (n))
 653 #define DECPTR(n, cp)   ((cp) -= (n))
 654
 655 /*
 656  * System dependent definitions for user-level 4.3BSD UNIX implementation.
 657  */
 658
 659 #define TIMEOUT(r, f, t)        timeout((r), (f), (t), 0)
 660 #define UNTIMEOUT(r, f)         untimeout((r), (f))
 661
 662 #define BCOPY(s, d, l)          memcpy(d, s, l)
 663 #define BZERO(s, n)             memset(s, 0, n)
 664
 665 #define PRINTMSG(m, l)          { info("Remote message: %0.*v", l, m); }
 666
 667 /*
 668  * MAKEHEADER - Add Header fields to a packet.
 669  */
 670 #define MAKEHEADER(p, t) { \
 671     PUTCHAR(PPP_ALLSTATIONS, p); \
 672     PUTCHAR(PPP_UI, p); \
 673     PUTSHORT(t, p); }
 674
 675 /*
 676  * Exit status values.
 677  */
 678 #define EXIT_OK                 0
 679 #define EXIT_FATAL_ERROR        1
 680 #define EXIT_OPTION_ERROR       2
 681 #define EXIT_NOT_ROOT           3
 682 #define EXIT_NO_KERNEL_SUPPORT  4
 683 #define EXIT_USER_REQUEST       5
 684 #define EXIT_LOCK_FAILED        6
 685 #define EXIT_OPEN_FAILED        7
 686 #define EXIT_CONNECT_FAILED     8
 687 #define EXIT_PTYCMD_FAILED      9
 688 #define EXIT_NEGOTIATION_FAILED 10
 689 #define EXIT_PEER_AUTH_FAILED   11
 690 #define EXIT_IDLE_TIMEOUT       12
 691 #define EXIT_CONNECT_TIME       13
 692 #define EXIT_CALLBACK           14
 693 #define EXIT_PEER_DEAD          15
 694 #define EXIT_HANGUP             16
 695 #define EXIT_LOOPBACK           17
 696 #define EXIT_INIT_FAILED        18
 697 #define EXIT_AUTH_TOPEER_FAILED 19
 698
 699 /*
 700  * Debug macros.  Slightly useful for finding bugs in pppd, not particularly
 701  * useful for finding out why your connection isn't being established.
 702  */
 703 #ifdef DEBUGALL
 704 #define DEBUGMAIN       1
 705 #define DEBUGFSM        1
 706 #define DEBUGLCP        1
 707 #define DEBUGIPCP       1
 708 #define DEBUGIPV6CP     1
 709 #define DEBUGUPAP       1
 710 #define DEBUGCHAP       1
 711 #endif
 712
 713 #ifndef LOG_PPP                     /* we use LOG_LOCAL2 for syslog by default */
 714 #if defined(DEBUGMAIN) || defined(DEBUGFSM) || defined(DEBUGSYS) \
 715   || defined(DEBUGLCP) || defined(DEBUGIPCP) || defined(DEBUGUPAP) \
 716   || defined(DEBUGCHAP) || defined(DEBUG) || defined(DEBUGIPV6CP)
 717 #define LOG_PPP LOG_LOCAL2
 718 #else
 719 #define LOG_PPP LOG_DAEMON
 720 #endif
 721 #endif /* LOG_PPP */
 722
 723 #ifdef DEBUGMAIN
 724 #define MAINDEBUG(x)    if (debug) dbglog x
 725 #else
 726 #define MAINDEBUG(x)
 727 #endif
 728
 729 #ifdef DEBUGSYS
 730 #define SYSDEBUG(x)     if (debug) dbglog x
 731 #else
 732 #define SYSDEBUG(x)
 733 #endif
 734
 735 #ifdef DEBUGFSM
 736 #define FSMDEBUG(x)     if (debug) dbglog x
 737 #else
 738 #define FSMDEBUG(x)
 739 #endif
 740
 741 #ifdef DEBUGLCP
 742 #define LCPDEBUG(x)     if (debug) dbglog x
 743 #else
 744 #define LCPDEBUG(x)
 745 #endif
 746
 747 #ifdef DEBUGIPCP
 748 #define IPCPDEBUG(x)    if (debug) dbglog x
 749 #else
 750 #define IPCPDEBUG(x)
 751 #endif
 752
 753 #ifdef DEBUGIPV6CP
 754 #define IPV6CPDEBUG(x)  if (debug) dbglog x
 755 #else
 756 #define IPV6CPDEBUG(x)
 757 #endif
 758
 759 #ifdef DEBUGUPAP
 760 #define UPAPDEBUG(x)    if (debug) dbglog x
 761 #else
 762 #define UPAPDEBUG(x)
 763 #endif
 764
 765 #ifdef DEBUGCHAP
 766 #define CHAPDEBUG(x)    if (debug) dbglog x
 767 #else
 768 #define CHAPDEBUG(x)
 769 #endif
 770
 771 #ifdef DEBUGIPXCP
 772 #define IPXCPDEBUG(x)   if (debug) dbglog x
 773 #else
 774 #define IPXCPDEBUG(x)
 775 #endif
 776
 777 #ifndef SIGTYPE
 778 #if defined(sun) || defined(SYSV) || defined(POSIX_SOURCE)
 779 #define SIGTYPE void
 780 #else
 781 #define SIGTYPE int
 782 #endif /* defined(sun) || defined(SYSV) || defined(POSIX_SOURCE) */
 783 #endif /* SIGTYPE */
 784
 785 #ifndef MIN
 786 #define MIN(a, b)       ((a) < (b)? (a): (b))
 787 #endif
 788 #ifndef MAX
 789 #define MAX(a, b)       ((a) > (b)? (a): (b))
 790 #endif
 791
 792 #endif /* __PPP_H__ */