pppd/pppd.h

   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 1.82 2003/04/07 00:01:46 paulus 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
  88 typedef unsigned char   bool;
  89
  90 enum 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
 100 typedef 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. */
 160 struct 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  */
 172 struct 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. */
 180 struct 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 */
 187 struct 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
 201 typedef void (*notify_func) __P((void *, int));
 202
 203 struct notifier {
 204     struct notifier *next;
 205     notify_func     func;
 206     void            *arg;
 207 };
 208
 209 /*
 210  * Global variables.
 211  */
 212
 213 extern int      hungup;         /* Physical layer has disconnected */
 214 extern int      ifunit;         /* Interface unit number */
 215 extern char     ifname[];       /* Interface name */
 216 extern char     hostname[];     /* Our hostname */
 217 extern u_char   outpacket_buf[]; /* Buffer for outgoing packets */
 218 extern int      phase;          /* Current state of link - see values below */
 219 extern int      baud_rate;      /* Current link speed in bits/sec */
 220 extern char     *progname;      /* Name of this program */
 221 extern int      redirect_stderr;/* Connector's stderr should go to file */
 222 extern char     peer_authname[];/* Authenticated name of peer */
 223 extern int      auth_done[NUM_PPP]; /* Methods actually used for auth */
 224 extern int      privileged;     /* We were run by real-uid root */
 225 extern int      need_holdoff;   /* Need holdoff period after link terminates */
 226 extern char     **script_env;   /* Environment variables for scripts */
 227 extern int      detached;       /* Have detached from controlling tty */
 228 extern GIDSET_TYPE groups[NGROUPS_MAX]; /* groups the user is in */
 229 extern int      ngroups;        /* How many groups valid in groups */
 230 extern struct pppd_stats link_stats; /* byte/packet counts etc. for link */
 231 extern int      link_stats_valid; /* set if link_stats is valid */
 232 extern unsigned link_connect_time; /* time the link was up for */
 233 extern int      using_pty;      /* using pty as device (notty or pty opt.) */
 234 extern int      log_to_fd;      /* logging to this fd as well as syslog */
 235 extern bool     log_default;    /* log_to_fd is default (stdout) */
 236 extern char     *no_ppp_msg;    /* message to print if ppp not in kernel */
 237 extern volatile int status;     /* exit status for pppd */
 238 extern bool     devnam_fixed;   /* can no longer change devnam */
 239 extern int      unsuccess;      /* # unsuccessful connection attempts */
 240 extern int      do_callback;    /* set if we want to do callback next */
 241 extern int      doing_callback; /* set if this is a callback */
 242 extern int      error_count;    /* # of times error() has been called */
 243 extern char     ppp_devnam[MAXPATHLEN];
 244 extern char     remote_number[MAXNAMELEN]; /* Remote telephone number, if avail. */
 245 extern int      ppp_session_number; /* Session number (eg PPPoE session) */
 246
 247 extern int      listen_time;    /* time to listen first (ms) */
 248 extern struct notifier *pidchange;   /* for notifications of pid changing */
 249 extern struct notifier *phasechange; /* for notifications of phase changes */
 250 extern struct notifier *exitnotify;  /* for notification that we're exiting */
 251 extern struct notifier *sigreceived; /* notification of received signal */
 252 extern struct notifier *ip_up_notifier; /* IPCP has come up */
 253 extern struct notifier *ip_down_notifier; /* IPCP has gone down */
 254 extern struct notifier *auth_up_notifier; /* peer has authenticated */
 255 extern struct notifier *link_down_notifier; /* link has gone down */
 256 extern struct notifier *fork_notifier;  /* we are a new child process */
 257
 258 /* Values for do_callback and doing_callback */
 259 #define CALLBACK_DIALIN         1       /* we are expecting the call back */
 260 #define CALLBACK_DIALOUT        2       /* we are dialling out to call back */
 261
 262 /*
 263  * Variables set by command-line options.
 264  */
 265
 266 extern int      debug;          /* Debug flag */
 267 extern int      kdebugflag;     /* Tell kernel to print debug messages */
 268 extern int      default_device; /* Using /dev/tty or equivalent */
 269 extern char     devnam[MAXPATHLEN];     /* Device name */
 270 extern int      crtscts;        /* Use hardware flow control */
 271 extern bool     modem;          /* Use modem control lines */
 272 extern int      inspeed;        /* Input/Output speed requested */
 273 extern u_int32_t netmask;       /* IP netmask to set on interface */
 274 extern bool     lockflag;       /* Create lock file to lock the serial dev */
 275 extern bool     nodetach;       /* Don't detach from controlling tty */
 276 extern bool     updetach;       /* Detach from controlling tty when link up */
 277 extern char     *initializer;   /* Script to initialize physical link */
 278 extern char     *connect_script; /* Script to establish physical link */
 279 extern char     *disconnect_script; /* Script to disestablish physical link */
 280 extern char     *welcomer;      /* Script to welcome client after connection */
 281 extern char     *ptycommand;    /* Command to run on other side of pty */
 282 extern int      maxconnect;     /* Maximum connect time (seconds) */
 283 extern char     user[MAXNAMELEN];/* Our name for authenticating ourselves */
 284 extern char     passwd[MAXSECRETLEN];   /* Password for PAP or CHAP */
 285 extern bool     auth_required;  /* Peer is required to authenticate */
 286 extern bool     persist;        /* Reopen link after it goes down */
 287 extern bool     uselogin;       /* Use /etc/passwd for checking PAP */
 288 extern char     our_name[MAXNAMELEN];/* Our name for authentication purposes */
 289 extern char     remote_name[MAXNAMELEN]; /* Peer's name for authentication */
 290 extern bool     explicit_remote;/* remote_name specified with remotename opt */
 291 extern bool     demand;         /* Do dial-on-demand */
 292 extern char     *ipparam;       /* Extra parameter for ip up/down scripts */
 293 extern bool     cryptpap;       /* Others' PAP passwords are encrypted */
 294 extern int      idle_time_limit;/* Shut down link if idle for this long */
 295 extern int      holdoff;        /* Dead time before restarting */
 296 extern bool     holdoff_specified; /* true if user gave a holdoff value */
 297 extern bool     notty;          /* Stdin/out is not a tty */
 298 extern char     *pty_socket;    /* Socket to connect to pty */
 299 extern char     *record_file;   /* File to record chars sent/received */
 300 extern bool     sync_serial;    /* Device is synchronous serial device */
 301 extern int      maxfail;        /* Max # of unsuccessful connection attempts */
 302 extern char     linkname[MAXPATHLEN]; /* logical name for link */
 303 extern bool     tune_kernel;    /* May alter kernel settings as necessary */
 304 extern int      connect_delay;  /* Time to delay after connect script */
 305 extern int      max_data_rate;  /* max bytes/sec through charshunt */
 306 extern int      req_unit;       /* interface unit number to use */
 307 extern bool     multilink;      /* enable multilink operation */
 308 extern bool     noendpoint;     /* don't send or accept endpt. discrim. */
 309 extern char     *bundle_name;   /* bundle name for multilink */
 310 extern bool     dump_options;   /* print out option values */
 311 extern bool     dryrun;         /* check everything, print options, exit */
 312
 313 #ifdef MAXOCTETS
 314 extern unsigned int maxoctets;       /* Maximum octetes per session (in bytes) */
 315 extern int       maxoctets_dir;      /* Direction :
 316                                       0 - in+out (default)
 317                                       1 - in
 318                                       2 - out
 319                                       3 - max(in,out) */
 320 extern int       maxoctets_timeout;  /* Timeout for check of octets limit */
 321 #define PPP_OCTETS_DIRECTION_SUM        0
 322 #define PPP_OCTETS_DIRECTION_IN         1
 323 #define PPP_OCTETS_DIRECTION_OUT        2
 324 #define PPP_OCTETS_DIRECTION_MAXOVERAL  3
 325 /* same as previos, but little different on RADIUS side */
 326 #define PPP_OCTETS_DIRECTION_MAXSESSION 4
 327 #endif
 328
 329 #ifdef PPP_FILTER
 330 extern struct   bpf_program pass_filter;   /* Filter for pkts to pass */
 331 extern struct   bpf_program active_filter; /* Filter for link-active pkts */
 332 #endif
 333
 334 #ifdef MSLANMAN
 335 extern bool     ms_lanman;      /* Use LanMan password instead of NT */
 336                                 /* Has meaning only with MS-CHAP challenges */
 337 #endif
 338
 339 /* Values for auth_pending, auth_done */
 340 #define PAP_WITHPEER    0x1
 341 #define PAP_PEER        0x2
 342 #define CHAP_WITHPEER   0x4
 343 #define CHAP_PEER       0x8
 344 #define EAP_WITHPEER    0x10
 345 #define EAP_PEER        0x20
 346
 347 /* Values for auth_done only */
 348 #define CHAP_MD5_WITHPEER       0x40
 349 #define CHAP_MD5_PEER           0x80
 350 #ifdef CHAPMS
 351 #define CHAP_MS_SHIFT           8       /* LSB position for MS auths */
 352 #define CHAP_MS_WITHPEER        0x100
 353 #define CHAP_MS_PEER            0x200
 354 #define CHAP_MS2_WITHPEER       0x400
 355 #define CHAP_MS2_PEER           0x800
 356 #endif
 357
 358 extern char *current_option;    /* the name of the option being parsed */
 359 extern int  privileged_option;  /* set iff the current option came from root */
 360 extern char *option_source;     /* string saying where the option came from */
 361 extern int  option_priority;    /* priority of current options */
 362
 363 /*
 364  * Values for phase.
 365  */
 366 #define PHASE_DEAD              0
 367 #define PHASE_INITIALIZE        1
 368 #define PHASE_SERIALCONN        2
 369 #define PHASE_DORMANT           3
 370 #define PHASE_ESTABLISH         4
 371 #define PHASE_AUTHENTICATE      5
 372 #define PHASE_CALLBACK          6
 373 #define PHASE_NETWORK           7
 374 #define PHASE_RUNNING           8
 375 #define PHASE_TERMINATE         9
 376 #define PHASE_DISCONNECT        10
 377 #define PHASE_HOLDOFF           11
 378
 379 /*
 380  * The following struct gives the addresses of procedures to call
 381  * for a particular protocol.
 382  */
 383 struct protent {
 384     u_short protocol;           /* PPP protocol number */
 385     /* Initialization procedure */
 386     void (*init) __P((int unit));
 387     /* Process a received packet */
 388     void (*input) __P((int unit, u_char *pkt, int len));
 389     /* Process a received protocol-reject */
 390     void (*protrej) __P((int unit));
 391     /* Lower layer has come up */
 392     void (*lowerup) __P((int unit));
 393     /* Lower layer has gone down */
 394     void (*lowerdown) __P((int unit));
 395     /* Open the protocol */
 396     void (*open) __P((int unit));
 397     /* Close the protocol */
 398     void (*close) __P((int unit, char *reason));
 399     /* Print a packet in readable form */
 400     int  (*printpkt) __P((u_char *pkt, int len,
 401                           void (*printer) __P((void *, char *, ...)),
 402                           void *arg));
 403     /* Process a received data packet */
 404     void (*datainput) __P((int unit, u_char *pkt, int len));
 405     bool enabled_flag;          /* 0 iff protocol is disabled */
 406     char *name;                 /* Text name of protocol */
 407     char *data_name;            /* Text name of corresponding data protocol */
 408     option_t *options;          /* List of command-line options */
 409     /* Check requested options, assign defaults */
 410     void (*check_options) __P((void));
 411     /* Configure interface for demand-dial */
 412     int  (*demand_conf) __P((int unit));
 413     /* Say whether to bring up link for this pkt */
 414     int  (*active_pkt) __P((u_char *pkt, int len));
 415 };
 416
 417 /* Table of pointers to supported protocols */
 418 extern struct protent *protocols[];
 419
 420 /*
 421  * This struct contains pointers to a set of procedures for
 422  * doing operations on a "channel".  A channel provides a way
 423  * to send and receive PPP packets - the canonical example is
 424  * a serial port device in PPP line discipline (or equivalently
 425  * with PPP STREAMS modules pushed onto it).
 426  */
 427 struct channel {
 428         /* set of options for this channel */
 429         option_t *options;
 430         /* find and process a per-channel options file */
 431         void (*process_extra_options) __P((void));
 432         /* check all the options that have been given */
 433         void (*check_options) __P((void));
 434         /* get the channel ready to do PPP, return a file descriptor */
 435         int  (*connect) __P((void));
 436         /* we're finished with the channel */
 437         void (*disconnect) __P((void));
 438         /* put the channel into PPP `mode' */
 439         int  (*establish_ppp) __P((int));
 440         /* take the channel out of PPP `mode', restore loopback if demand */
 441         void (*disestablish_ppp) __P((int));
 442         /* set the transmit-side PPP parameters of the channel */
 443         void (*send_config) __P((int, u_int32_t, int, int));
 444         /* set the receive-side PPP parameters of the channel */
 445         void (*recv_config) __P((int, u_int32_t, int, int));
 446         /* cleanup on error or normal exit */
 447         void (*cleanup) __P((void));
 448         /* close the device, called in children after fork */
 449         void (*close) __P((void));
 450 };
 451
 452 extern struct channel *the_channel;
 453
 454 /*
 455  * Prototypes.
 456  */
 457
 458 /* Procedures exported from main.c. */
 459 void set_ifunit __P((int));     /* set stuff that depends on ifunit */
 460 void detach __P((void));        /* Detach from controlling tty */
 461 void die __P((int));            /* Cleanup and exit */
 462 void quit __P((void));          /* like die(1) */
 463 void novm __P((char *));        /* Say we ran out of memory, and die */
 464 void timeout __P((void (*func)(void *), void *arg, int s, int us));
 465                                 /* Call func(arg) after s.us seconds */
 466 void untimeout __P((void (*func)(void *), void *arg));
 467                                 /* Cancel call to func(arg) */
 468 void record_child __P((int, char *, void (*) (void *), void *));
 469 pid_t safe_fork __P((void));    /* Fork & close stuff in child */
 470 int  device_script __P((char *cmd, int in, int out, int dont_wait));
 471                                 /* Run `cmd' with given stdin and stdout */
 472 pid_t run_program __P((char *prog, char **args, int must_exist,
 473                        void (*done)(void *), void *arg));
 474                                 /* Run program prog with args in child */
 475 void reopen_log __P((void));    /* (re)open the connection to syslog */
 476 void update_link_stats __P((int)); /* Get stats at link termination */
 477 void script_setenv __P((char *, char *, int));  /* set script env var */
 478 void script_unsetenv __P((char *));             /* unset script env var */
 479 void new_phase __P((int));      /* signal start of new phase */
 480 void add_notifier __P((struct notifier **, notify_func, void *));
 481 void remove_notifier __P((struct notifier **, notify_func, void *));
 482 void notify __P((struct notifier *, int));
 483 int  ppp_send_config __P((int, int, u_int32_t, int, int));
 484 int  ppp_recv_config __P((int, int, u_int32_t, int, int));
 485
 486 /* Procedures exported from tty.c. */
 487 void tty_init __P((void));
 488
 489 /* Procedures exported from utils.c. */
 490 void log_packet __P((u_char *, int, char *, int));
 491                                 /* Format a packet and log it with syslog */
 492 void print_string __P((char *, int,  void (*) (void *, char *, ...),
 493                 void *));       /* Format a string for output */
 494 int slprintf __P((char *, int, char *, ...));           /* sprintf++ */
 495 int vslprintf __P((char *, int, char *, va_list));      /* vsprintf++ */
 496 size_t strlcpy __P((char *, const char *, size_t));     /* safe strcpy */
 497 size_t strlcat __P((char *, const char *, size_t));     /* safe strncpy */
 498 void dbglog __P((char *, ...)); /* log a debug message */
 499 void info __P((char *, ...));   /* log an informational message */
 500 void notice __P((char *, ...)); /* log a notice-level message */
 501 void warn __P((char *, ...));   /* log a warning message */
 502 void error __P((char *, ...));  /* log an error message */
 503 void fatal __P((char *, ...));  /* log an error message and die(1) */
 504 void init_pr_log __P((char *, int));    /* initialize for using pr_log */
 505 void pr_log __P((void *, char *, ...)); /* printer fn, output to syslog */
 506 void end_pr_log __P((void));    /* finish up after using pr_log */
 507 void dump_packet __P((const char *, u_char *, int));
 508                                 /* dump packet to debug log if interesting */
 509 ssize_t complete_read __P((int, void *, size_t));
 510                                 /* read a complete buffer */
 511
 512 /* Procedures exported from auth.c */
 513 void link_required __P((int));    /* we are starting to use the link */
 514 void link_terminated __P((int));  /* we are finished with the link */
 515 void link_down __P((int));        /* the LCP layer has left the Opened state */
 516 void link_established __P((int)); /* the link is up; authenticate now */
 517 void start_networks __P((int));   /* start all the network control protos */
 518 void continue_networks __P((int)); /* start network [ip, etc] control protos */
 519 void np_up __P((int, int));       /* a network protocol has come up */
 520 void np_down __P((int, int));     /* a network protocol has gone down */
 521 void np_finished __P((int, int)); /* a network protocol no longer needs link */
 522 void auth_peer_fail __P((int, int));
 523                                 /* peer failed to authenticate itself */
 524 void auth_peer_success __P((int, int, int, char *, int));
 525                                 /* peer successfully authenticated itself */
 526 void auth_withpeer_fail __P((int, int));
 527                                 /* we failed to authenticate ourselves */
 528 void auth_withpeer_success __P((int, int, int));
 529                                 /* we successfully authenticated ourselves */
 530 void auth_check_options __P((void));
 531                                 /* check authentication options supplied */
 532 void auth_reset __P((int));     /* check what secrets we have */
 533 int  check_passwd __P((int, char *, int, char *, int, char **));
 534                                 /* Check peer-supplied username/password */
 535 int  get_secret __P((int, char *, char *, char *, int *, int));
 536                                 /* get "secret" for chap */
 537 int  get_srp_secret __P((int unit, char *client, char *server, char *secret,
 538     int am_server));
 539 int  auth_ip_addr __P((int, u_int32_t));
 540                                 /* check if IP address is authorized */
 541 int  auth_number __P((void));   /* check if remote number is authorized */
 542 int  bad_ip_adrs __P((u_int32_t));
 543                                 /* check if IP address is unreasonable */
 544
 545 /* Procedures exported from demand.c */
 546 void demand_conf __P((void));   /* config interface(s) for demand-dial */
 547 void demand_block __P((void));  /* set all NPs to queue up packets */
 548 void demand_unblock __P((void)); /* set all NPs to pass packets */
 549 void demand_discard __P((void)); /* set all NPs to discard packets */
 550 void demand_rexmit __P((int));  /* retransmit saved frames for an NP */
 551 int  loop_chars __P((unsigned char *, int)); /* process chars from loopback */
 552 int  loop_frame __P((unsigned char *, int)); /* should we bring link up? */
 553
 554 /* Procedures exported from multilink.c */
 555 void mp_check_options __P((void)); /* Check multilink-related options */
 556 int  mp_join_bundle __P((void));  /* join our link to an appropriate bundle */
 557 char *epdisc_to_str __P((struct epdisc *)); /* string from endpoint discrim. */
 558 int  str_to_epdisc __P((struct epdisc *, char *)); /* endpt disc. from str */
 559
 560 /* Procedures exported from sys-*.c */
 561 void sys_init __P((void));      /* Do system-dependent initialization */
 562 void sys_cleanup __P((void));   /* Restore system state before exiting */
 563 int  sys_check_options __P((void)); /* Check options specified */
 564 void sys_close __P((void));     /* Clean up in a child before execing */
 565 int  ppp_available __P((void)); /* Test whether ppp kernel support exists */
 566 int  get_pty __P((int *, int *, char *, int));  /* Get pty master/slave */
 567 int  open_ppp_loopback __P((void)); /* Open loopback for demand-dialling */
 568 int  tty_establish_ppp __P((int));  /* Turn serial port into a ppp interface */
 569 void tty_disestablish_ppp __P((int)); /* Restore port to normal operation */
 570 void generic_disestablish_ppp __P((int dev_fd)); /* Restore device setting */
 571 int  generic_establish_ppp __P((int dev_fd)); /* Make a ppp interface */
 572 void make_new_bundle __P((int, int, int, int)); /* Create new bundle */
 573 int  bundle_attach __P((int));  /* Attach link to existing bundle */
 574 void cfg_bundle __P((int, int, int, int)); /* Configure existing bundle */
 575 void clean_check __P((void));   /* Check if line was 8-bit clean */
 576 void set_up_tty __P((int, int)); /* Set up port's speed, parameters, etc. */
 577 void restore_tty __P((int));    /* Restore port's original parameters */
 578 void setdtr __P((int, int));    /* Raise or lower port's DTR line */
 579 void output __P((int, u_char *, int)); /* Output a PPP packet */
 580 void wait_input __P((struct timeval *));
 581                                 /* Wait for input, with timeout */
 582 void add_fd __P((int));         /* Add fd to set to wait for */
 583 void remove_fd __P((int));      /* Remove fd from set to wait for */
 584 int  read_packet __P((u_char *)); /* Read PPP packet */
 585 int  get_loop_output __P((void)); /* Read pkts from loopback */
 586 void tty_send_config __P((int, u_int32_t, int, int));
 587                                 /* Configure i/f transmit parameters */
 588 void tty_set_xaccm __P((ext_accm));
 589                                 /* Set extended transmit ACCM */
 590 void tty_recv_config __P((int, u_int32_t, int, int));
 591                                 /* Configure i/f receive parameters */
 592 int  ccp_test __P((int, u_char *, int, int));
 593                                 /* Test support for compression scheme */
 594 void ccp_flags_set __P((int, int, int));
 595                                 /* Set kernel CCP state */
 596 int  ccp_fatal_error __P((int)); /* Test for fatal decomp error in kernel */
 597 int  get_idle_time __P((int, struct ppp_idle *));
 598                                 /* Find out how long link has been idle */
 599 int  get_ppp_stats __P((int, struct pppd_stats *));
 600                                 /* Return link statistics */
 601 void netif_set_mtu __P((int, int)); /* Set PPP interface MTU */
 602 int  netif_get_mtu __P((int));      /* Get PPP interface MTU */
 603 int  sifvjcomp __P((int, int, int, int));
 604                                 /* Configure VJ TCP header compression */
 605 int  sifup __P((int));          /* Configure i/f up for one protocol */
 606 int  sifnpmode __P((int u, int proto, enum NPmode mode));
 607                                 /* Set mode for handling packets for proto */
 608 int  sifdown __P((int));        /* Configure i/f down for one protocol */
 609 int  sifaddr __P((int, u_int32_t, u_int32_t, u_int32_t));
 610                                 /* Configure IPv4 addresses for i/f */
 611 int  cifaddr __P((int, u_int32_t, u_int32_t));
 612                                 /* Reset i/f IP addresses */
 613 #ifdef INET6
 614 int  sif6addr __P((int, eui64_t, eui64_t));
 615                                 /* Configure IPv6 addresses for i/f */
 616 int  cif6addr __P((int, eui64_t, eui64_t));
 617                                 /* Remove an IPv6 address from i/f */
 618 #endif
 619 int  sifdefaultroute __P((int, u_int32_t, u_int32_t));
 620                                 /* Create default route through i/f */
 621 int  cifdefaultroute __P((int, u_int32_t, u_int32_t));
 622                                 /* Delete default route through i/f */
 623 int  sifproxyarp __P((int, u_int32_t));
 624                                 /* Add proxy ARP entry for peer */
 625 int  cifproxyarp __P((int, u_int32_t));
 626                                 /* Delete proxy ARP entry for peer */
 627 u_int32_t GetMask __P((u_int32_t)); /* Get appropriate netmask for address */
 628 int  lock __P((char *));        /* Create lock file for device */
 629 int  relock __P((int));         /* Rewrite lock file with new pid */
 630 void unlock __P((void));        /* Delete previously-created lock file */
 631 void logwtmp __P((const char *, const char *, const char *));
 632                                 /* Write entry to wtmp file */
 633 int  get_host_seed __P((void)); /* Get host-dependent random number seed */
 634 int  have_route_to __P((u_int32_t)); /* Check if route to addr exists */
 635 #ifdef PPP_FILTER
 636 int  set_filters __P((struct bpf_program *pass, struct bpf_program *active));
 637                                 /* Set filter programs in kernel */
 638 #endif
 639 #ifdef IPX_CHANGE
 640 int  sipxfaddr __P((int, unsigned long, unsigned char *));
 641 int  cipxfaddr __P((int));
 642 #endif
 643 int  get_if_hwaddr __P((u_char *addr, char *name));
 644 char *get_first_ethernet __P((void));
 645
 646 /* Procedures exported from options.c */
 647 int setipaddr __P((char *, char **, int)); /* Set local/remote ip addresses */
 648 int  parse_args __P((int argc, char **argv));
 649                                 /* Parse options from arguments given */
 650 int  options_from_file __P((char *filename, int must_exist, int check_prot,
 651                             int privileged));
 652                                 /* Parse options from an options file */
 653 int  options_from_user __P((void)); /* Parse options from user's .ppprc */
 654 int  options_for_tty __P((void)); /* Parse options from /etc/ppp/options.tty */
 655 int  options_from_list __P((struct wordlist *, int privileged));
 656                                 /* Parse options from a wordlist */
 657 int  getword __P((FILE *f, char *word, int *newlinep, char *filename));
 658                                 /* Read a word from a file */
 659 void option_error __P((char *fmt, ...));
 660                                 /* Print an error message about an option */
 661 int int_option __P((char *, int *));
 662                                 /* Simplified number_option for decimal ints */
 663 void add_options __P((option_t *)); /* Add extra options */
 664 void check_options __P((void)); /* check values after all options parsed */
 665 int  override_value __P((const char *, int, const char *));
 666                                 /* override value if permitted by priority */
 667 void print_options __P((void (*) __P((void *, char *, ...)), void *));
 668                                 /* print out values of all options */
 669
 670 int parse_dotted_ip __P((char *, u_int32_t *));
 671
 672 /*
 673  * Hooks to enable plugins to change various things.
 674  */
 675 extern int (*new_phase_hook) __P((int));
 676 extern int (*idle_time_hook) __P((struct ppp_idle *));
 677 extern int (*holdoff_hook) __P((void));
 678 extern int (*pap_check_hook) __P((void));
 679 extern int (*pap_auth_hook) __P((char *user, char *passwd, char **msgp,
 680                                  struct wordlist **paddrs,
 681                                  struct wordlist **popts));
 682 extern void (*pap_logout_hook) __P((void));
 683 extern int (*pap_passwd_hook) __P((char *user, char *passwd));
 684 extern int (*allowed_address_hook) __P((u_int32_t addr));
 685 extern void (*ip_up_hook) __P((void));
 686 extern void (*ip_down_hook) __P((void));
 687 extern void (*ip_choose_hook) __P((u_int32_t *));
 688
 689 extern int (*chap_check_hook) __P((void));
 690 extern int (*chap_passwd_hook) __P((char *user, char *passwd));
 691
 692 /* Let a plugin snoop sent and received packets.  Useful for L2TP */
 693 extern void (*snoop_recv_hook) __P((unsigned char *p, int len));
 694 extern void (*snoop_send_hook) __P((unsigned char *p, int len));
 695
 696 /*
 697  * Inline versions of get/put char/short/long.
 698  * Pointer is advanced; we assume that both arguments
 699  * are lvalues and will already be in registers.
 700  * cp MUST be u_char *.
 701  */
 702 #define GETCHAR(c, cp) { \
 703         (c) = *(cp)++; \
 704 }
 705 #define PUTCHAR(c, cp) { \
 706         *(cp)++ = (u_char) (c); \
 707 }
 708
 709
 710 #define GETSHORT(s, cp) { \
 711         (s) = *(cp)++ << 8; \
 712         (s) |= *(cp)++; \
 713 }
 714 #define PUTSHORT(s, cp) { \
 715         *(cp)++ = (u_char) ((s) >> 8); \
 716         *(cp)++ = (u_char) (s); \
 717 }
 718
 719 #define GETLONG(l, cp) { \
 720         (l) = *(cp)++ << 8; \
 721         (l) |= *(cp)++; (l) <<= 8; \
 722         (l) |= *(cp)++; (l) <<= 8; \
 723         (l) |= *(cp)++; \
 724 }
 725 #define PUTLONG(l, cp) { \
 726         *(cp)++ = (u_char) ((l) >> 24); \
 727         *(cp)++ = (u_char) ((l) >> 16); \
 728         *(cp)++ = (u_char) ((l) >> 8); \
 729         *(cp)++ = (u_char) (l); \
 730 }
 731
 732 #define INCPTR(n, cp)   ((cp) += (n))
 733 #define DECPTR(n, cp)   ((cp) -= (n))
 734
 735 /*
 736  * System dependent definitions for user-level 4.3BSD UNIX implementation.
 737  */
 738
 739 #define TIMEOUT(r, f, t)        timeout((r), (f), (t), 0)
 740 #define UNTIMEOUT(r, f)         untimeout((r), (f))
 741
 742 #define BCOPY(s, d, l)          memcpy(d, s, l)
 743 #define BZERO(s, n)             memset(s, 0, n)
 744 #define BCMP(s1, s2, l)         memcmp(s1, s2, l)
 745
 746 #define PRINTMSG(m, l)          { info("Remote message: %0.*v", l, m); }
 747
 748 /*
 749  * MAKEHEADER - Add Header fields to a packet.
 750  */
 751 #define MAKEHEADER(p, t) { \
 752     PUTCHAR(PPP_ALLSTATIONS, p); \
 753     PUTCHAR(PPP_UI, p); \
 754     PUTSHORT(t, p); }
 755
 756 /*
 757  * Exit status values.
 758  */
 759 #define EXIT_OK                 0
 760 #define EXIT_FATAL_ERROR        1
 761 #define EXIT_OPTION_ERROR       2
 762 #define EXIT_NOT_ROOT           3
 763 #define EXIT_NO_KERNEL_SUPPORT  4
 764 #define EXIT_USER_REQUEST       5
 765 #define EXIT_LOCK_FAILED        6
 766 #define EXIT_OPEN_FAILED        7
 767 #define EXIT_CONNECT_FAILED     8
 768 #define EXIT_PTYCMD_FAILED      9
 769 #define EXIT_NEGOTIATION_FAILED 10
 770 #define EXIT_PEER_AUTH_FAILED   11
 771 #define EXIT_IDLE_TIMEOUT       12
 772 #define EXIT_CONNECT_TIME       13
 773 #define EXIT_CALLBACK           14
 774 #define EXIT_PEER_DEAD          15
 775 #define EXIT_HANGUP             16
 776 #define EXIT_LOOPBACK           17
 777 #define EXIT_INIT_FAILED        18
 778 #define EXIT_AUTH_TOPEER_FAILED 19
 779 #ifdef MAXOCTETS
 780 #define EXIT_TRAFFIC_LIMIT      20
 781 #endif
 782 #define EXIT_CNID_AUTH_FAILED   21
 783
 784 /*
 785  * Debug macros.  Slightly useful for finding bugs in pppd, not particularly
 786  * useful for finding out why your connection isn't being established.
 787  */
 788 #ifdef DEBUGALL
 789 #define DEBUGMAIN       1
 790 #define DEBUGFSM        1
 791 #define DEBUGLCP        1
 792 #define DEBUGIPCP       1
 793 #define DEBUGIPV6CP     1
 794 #define DEBUGUPAP       1
 795 #define DEBUGCHAP       1
 796 #endif
 797
 798 #ifndef LOG_PPP                 /* we use LOG_LOCAL2 for syslog by default */
 799 #if defined(DEBUGMAIN) || defined(DEBUGFSM) || defined(DEBUGSYS) \
 800   || defined(DEBUGLCP) || defined(DEBUGIPCP) || defined(DEBUGUPAP) \
 801   || defined(DEBUGCHAP) || defined(DEBUG) || defined(DEBUGIPV6CP)
 802 #define LOG_PPP LOG_LOCAL2
 803 #else
 804 #define LOG_PPP LOG_DAEMON
 805 #endif
 806 #endif /* LOG_PPP */
 807
 808 #ifdef DEBUGMAIN
 809 #define MAINDEBUG(x)    if (debug) dbglog x
 810 #else
 811 #define MAINDEBUG(x)
 812 #endif
 813
 814 #ifdef DEBUGSYS
 815 #define SYSDEBUG(x)     if (debug) dbglog x
 816 #else
 817 #define SYSDEBUG(x)
 818 #endif
 819
 820 #ifdef DEBUGFSM
 821 #define FSMDEBUG(x)     if (debug) dbglog x
 822 #else
 823 #define FSMDEBUG(x)
 824 #endif
 825
 826 #ifdef DEBUGLCP
 827 #define LCPDEBUG(x)     if (debug) dbglog x
 828 #else
 829 #define LCPDEBUG(x)
 830 #endif
 831
 832 #ifdef DEBUGIPCP
 833 #define IPCPDEBUG(x)    if (debug) dbglog x
 834 #else
 835 #define IPCPDEBUG(x)
 836 #endif
 837
 838 #ifdef DEBUGIPV6CP
 839 #define IPV6CPDEBUG(x)  if (debug) dbglog x
 840 #else
 841 #define IPV6CPDEBUG(x)
 842 #endif
 843
 844 #ifdef DEBUGUPAP
 845 #define UPAPDEBUG(x)    if (debug) dbglog x
 846 #else
 847 #define UPAPDEBUG(x)
 848 #endif
 849
 850 #ifdef DEBUGCHAP
 851 #define CHAPDEBUG(x)    if (debug) dbglog x
 852 #else
 853 #define CHAPDEBUG(x)
 854 #endif
 855
 856 #ifdef DEBUGIPXCP
 857 #define IPXCPDEBUG(x)   if (debug) dbglog x
 858 #else
 859 #define IPXCPDEBUG(x)
 860 #endif
 861
 862 #ifndef SIGTYPE
 863 #if defined(sun) || defined(SYSV) || defined(POSIX_SOURCE)
 864 #define SIGTYPE void
 865 #else
 866 #define SIGTYPE int
 867 #endif /* defined(sun) || defined(SYSV) || defined(POSIX_SOURCE) */
 868 #endif /* SIGTYPE */
 869
 870 #ifndef MIN
 871 #define MIN(a, b)       ((a) < (b)? (a): (b))
 872 #endif
 873 #ifndef MAX
 874 #define MAX(a, b)       ((a) > (b)? (a): (b))
 875 #endif
 876
 877 #ifndef offsetof
 878 #define offsetof(type, member) ((size_t) &((type *)0)->member)
 879 #endif
 880
 881 #endif /* __PPP_H__ */