2 * pppd-private.h - PPP daemon private declarations.
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42 * $Id: pppd.h,v 1.96 2008/06/23 11:47:18 paulus Exp $
45 #ifndef PPP_PPPD_PRIVATE_H
46 #define PPP_PPPD_PRIVATE_H
48 #include <stdio.h> /* for FILE */
49 #include <stdlib.h> /* for encrypt */
50 #include <unistd.h> /* for setkey */
52 #include <net/ppp_defs.h>
54 #include <linux/ppp_defs.h>
59 #ifdef PPP_WITH_IPV6CP
64 * If PPP_DRV_NAME is not defined, use the default "ppp" as the device name.
65 * Where should PPP_DRV_NAME come from? Do we include it here?
67 #if !defined(PPP_DRV_NAME)
68 #define PPP_DRV_NAME "ppp"
69 #endif /* !defined(PPP_DRV_NAME) */
73 #define GIDSET_TYPE gid_t
76 /* Structure representing a list of permitted IP addresses. */
78 int permit; /* 1 = permit, 0 = forbid */
79 u_int32_t base; /* match if (addr & mask) == base */
80 u_int32_t mask; /* base and mask are in network byte order */
84 struct notifier *next;
93 extern int hungup; /* Physical layer has disconnected */
94 extern int ifunit; /* Interface unit number */
95 extern char ifname[]; /* Interface name (IFNAMSIZ) */
96 extern char hostname[]; /* Our hostname */
97 extern unsigned char outpacket_buf[]; /* Buffer for outgoing packets */
98 extern int devfd; /* fd of underlying device */
99 extern int fd_ppp; /* fd for talking PPP */
100 extern int baud_rate; /* Current link speed in bits/sec */
101 extern char *progname; /* Name of this program */
102 extern int redirect_stderr;/* Connector's stderr should go to file */
103 extern char peer_authname[];/* Authenticated name of peer */
104 extern int auth_done[NUM_PPP]; /* Methods actually used for auth */
105 extern int privileged; /* We were run by real-uid root */
106 extern int need_holdoff; /* Need holdoff period after link terminates */
107 extern char **script_env; /* Environment variables for scripts */
108 extern int detached; /* Have detached from controlling tty */
109 extern GIDSET_TYPE groups[]; /* groups the user is in */
110 extern int ngroups; /* How many groups valid in groups */
111 extern int link_stats_valid; /* set if link_stats is valid */
112 extern int link_stats_print; /* set if link_stats is to be printed on link termination */
113 extern int log_to_fd; /* logging to this fd as well as syslog */
114 extern bool log_default; /* log_to_fd is default (stdout) */
115 extern char *no_ppp_msg; /* message to print if ppp not in kernel */
116 extern bool devnam_fixed; /* can no longer change devnam */
117 extern int unsuccess; /* # unsuccessful connection attempts */
118 extern int do_callback; /* set if we want to do callback next */
119 extern int doing_callback; /* set if this is a callback */
120 extern int error_count; /* # of times error() has been called */
121 extern char ppp_devname[]; /* name of PPP tty (maybe ttypx) */
122 extern int fd_devnull; /* fd open to /dev/null */
124 extern int listen_time; /* time to listen first (ms) */
125 extern bool bundle_eof;
126 extern bool bundle_terminating;
128 extern struct notifier *pidchange; /* for notifications of pid changing */
129 extern struct notifier *phasechange; /* for notifications of phase changes */
130 extern struct notifier *exitnotify; /* for notification that we're exiting */
131 extern struct notifier *sigreceived; /* notification of received signal */
132 extern struct notifier *ip_up_notifier; /* IPCP has come up */
133 extern struct notifier *ip_down_notifier; /* IPCP has gone down */
134 extern struct notifier *ipv6_up_notifier; /* IPV6CP has come up */
135 extern struct notifier *ipv6_down_notifier; /* IPV6CP has gone down */
136 extern struct notifier *auth_up_notifier; /* peer has authenticated */
137 extern struct notifier *link_down_notifier; /* link has gone down */
138 extern struct notifier *fork_notifier; /* we are a new child process */
141 /* Values for do_callback and doing_callback */
142 #define CALLBACK_DIALIN 1 /* we are expecting the call back */
143 #define CALLBACK_DIALOUT 2 /* we are dialling out to call back */
146 * Variables set by command-line options.
149 extern int debug; /* Debug flag */
150 extern int kdebugflag; /* Tell kernel to print debug messages */
151 extern int default_device; /* Using /dev/tty or equivalent */
152 extern char devnam[]; /* Device name */
153 extern char remote_number[MAXNAMELEN]; /* Remote telephone number, if avail. */
154 extern int ppp_session_number; /* Session number (eg PPPoE session) */
155 extern int crtscts; /* Use hardware flow control */
156 extern int stop_bits; /* Number of serial port stop bits */
157 extern bool modem; /* Use modem control lines */
158 extern int inspeed; /* Input/Output speed requested */
159 extern u_int32_t netmask; /* IP netmask to set on interface */
160 extern bool lockflag; /* Create lock file to lock the serial dev */
161 extern bool nodetach; /* Don't detach from controlling tty */
163 extern bool up_sdnotify; /* Notify systemd once link is up (implies nodetach) */
165 extern bool updetach; /* Detach from controlling tty when link up */
166 extern bool master_detach; /* Detach when multilink master without link (options.c) */
167 extern char *initializer; /* Script to initialize physical link */
168 extern char *connect_script; /* Script to establish physical link */
169 extern char *disconnect_script; /* Script to disestablish physical link */
170 extern char *welcomer; /* Script to welcome client after connection */
171 extern char *ptycommand; /* Command to run on other side of pty */
172 extern char user[MAXNAMELEN];/* Our name for authenticating ourselves */
173 extern char passwd[MAXSECRETLEN]; /* Password for PAP or CHAP */
174 extern bool auth_required; /* Peer is required to authenticate */
175 extern bool persist; /* Reopen link after it goes down */
176 extern bool uselogin; /* Use /etc/passwd for checking PAP */
177 extern bool session_mgmt; /* Do session management (login records) */
178 extern char our_name[MAXNAMELEN];/* Our name for authentication purposes */
179 extern char remote_name[MAXNAMELEN]; /* Peer's name for authentication */
180 extern bool explicit_remote;/* remote_name specified with remotename opt */
181 extern bool demand; /* Do dial-on-demand */
182 extern char *ipparam; /* Extra parameter for ip up/down scripts */
183 extern bool cryptpap; /* Others' PAP passwords are encrypted */
184 extern int holdoff; /* Dead time before restarting */
185 extern bool holdoff_specified; /* true if user gave a holdoff value */
186 extern bool notty; /* Stdin/out is not a tty */
187 extern char *pty_socket; /* Socket to connect to pty */
188 extern char *record_file; /* File to record chars sent/received */
189 extern int maxfail; /* Max # of unsuccessful connection attempts */
190 extern char linkname[]; /* logical name for link */
191 extern bool tune_kernel; /* May alter kernel settings as necessary */
192 extern int connect_delay; /* Time to delay after connect script */
193 extern int max_data_rate; /* max bytes/sec through charshunt */
194 extern int req_unit; /* interface unit number to use */
195 extern char path_ipup[]; /* pathname of ip-up script */
196 extern char path_ipdown[]; /* pathname of ip-down script */
197 extern char req_ifname[]; /* interface name to use (IFNAMSIZ) */
198 extern bool multilink; /* enable multilink operation (options.c) */
199 extern bool noendpoint; /* don't send or accept endpt. discrim. */
200 extern char *bundle_name; /* bundle name for multilink */
201 extern bool dump_options; /* print out option values */
202 extern bool show_options; /* show all option names and descriptions */
203 extern bool dryrun; /* check everything, print options, exit */
204 extern int child_wait; /* # seconds to wait for children at end */
205 extern char *current_option; /* the name of the option being parsed */
206 extern int privileged_option; /* set iff the current option came from root */
207 extern char *option_source; /* string saying where the option came from */
208 extern int option_priority; /* priority of current options */
210 #ifdef PPP_WITH_IPV6CP
211 extern char path_ipv6up[]; /* pathname of ipv6-up script */
212 extern char path_ipv6down[]; /* pathname of ipv6-down script */
215 #if defined(PPP_WITH_EAPTLS) || defined(PPP_WITH_PEAP)
216 #define TLS_VERIFY_NONE "none"
217 #define TLS_VERIFY_NAME "name"
218 #define TLS_VERIFY_SUBJECT "subject"
219 #define TLS_VERIFY_SUFFIX "suffix"
221 extern char *crl_dir;
222 extern char *crl_file;
223 extern char *ca_path;
224 extern char *cacert_file;
226 extern char *max_tls_version;
227 extern bool tls_verify_key_usage;
228 extern char *tls_verify_method;
229 #endif /* PPP_WITH_EAPTLS || PPP_WITH_PEAP */
231 #ifdef PPP_WITH_EAPTLS
232 extern char *pkcs12_file;
233 #endif /* PPP_WITH_EAPTLS */
236 PPP_OCTETS_DIRECTION_SUM,
237 PPP_OCTETS_DIRECTION_IN,
238 PPP_OCTETS_DIRECTION_OUT,
239 PPP_OCTETS_DIRECTION_MAXOVERAL,
240 PPP_OCTETS_DIRECTION_MAXSESSION /* Same as MAXOVERALL, but a little different for RADIUS */
241 } session_limit_dir_t;
243 extern unsigned int maxoctets; /* Maximum octetes per session (in bytes) */
244 extern session_limit_dir_t maxoctets_dir; /* Direction */
245 extern int maxoctets_timeout; /* Timeout for check of octets limit */
247 #ifdef PPP_WITH_FILTER
248 extern struct bpf_program pass_filter; /* Filter for pkts to pass */
249 extern struct bpf_program active_filter; /* Filter for link-active pkts */
252 #ifdef PPP_WITH_MSLANMAN
253 extern bool ms_lanman; /* Use LanMan password instead of NT */
254 /* Has meaning only with MS-CHAP challenges */
257 /* Values for auth_pending, auth_done */
258 #define PAP_WITHPEER 0x1
260 #define CHAP_WITHPEER 0x4
261 #define CHAP_PEER 0x8
262 #define EAP_WITHPEER 0x10
263 #define EAP_PEER 0x20
265 /* Values for auth_done only */
266 #define CHAP_MD5_WITHPEER 0x40
267 #define CHAP_MD5_PEER 0x80
268 #define CHAP_MS_SHIFT 8 /* LSB position for MS auths */
269 #define CHAP_MS_WITHPEER 0x100
270 #define CHAP_MS_PEER 0x200
271 #define CHAP_MS2_WITHPEER 0x400
272 #define CHAP_MS2_PEER 0x800
276 * This structure contains environment variables that are set or unset
280 struct userenv *ue_next;
281 char *ue_value; /* value (set only) */
282 bool ue_isset; /* 1 for set, 0 for unset */
283 bool ue_priv; /* from privileged source */
284 const char *ue_source; /* source name */
285 char ue_name[1]; /* variable name */
288 extern struct userenv *userenv_list;
294 /* Procedures exported from main.c. */
295 void set_ifunit(int); /* set stuff that depends on ifunit */
296 void detach(void); /* Detach from controlling tty */
297 void die(int); /* Cleanup and exit */
298 void quit(void); /* like die(1) */
300 void record_child(int, char *, void (*) (void *), void *, int);
301 int device_script(char *cmd, int in, int out, int dont_wait);
302 /* Run `cmd' with given stdin and stdout */
303 pid_t run_program(char *prog, char * const * args, int must_exist,
304 void (*done)(void *), void *arg, int wait);
305 /* Run program prog with args in child */
306 void reopen_log(void); /* (re)open the connection to syslog */
307 void print_link_stats(void); /* Print stats, if available */
308 void reset_link_stats(int); /* Reset (init) stats when link goes up */
309 void new_phase(ppp_phase_t); /* signal start of new phase */
310 bool in_phase(ppp_phase_t);
311 void notify(struct notifier *, int);
312 int ppp_send_config(int, int, u_int32_t, int, int);
313 int ppp_recv_config(int, int, u_int32_t, int, int);
314 const char *protocol_name(int);
315 void remove_pidfiles(void);
317 void unlock_db(void);
319 /* Procedures exported from tty.c. */
322 void print_string(char *, int, printer_func, void *);
323 /* Format a string for output */
324 ssize_t complete_read(int, void *, size_t);
325 /* read a complete buffer */
327 /* Procedures exported from auth.c */
328 void link_required(int); /* we are starting to use the link */
329 void start_link(int); /* bring the link up now */
330 void link_terminated(int); /* we are finished with the link */
331 void link_down(int); /* the LCP layer has left the Opened state */
332 void upper_layers_down(int);/* take all NCPs down */
333 void link_established(int); /* the link is up; authenticate now */
334 void start_networks(int); /* start all the network control protos */
335 void continue_networks(int); /* start network [ip, etc] control protos */
336 void np_up(int, int); /* a network protocol has come up */
337 void np_down(int, int); /* a network protocol has gone down */
338 void np_finished(int, int); /* a network protocol no longer needs link */
339 void auth_peer_fail(int, int);
340 /* peer failed to authenticate itself */
341 void auth_peer_success(int, int, int, char *, int);
342 /* peer successfully authenticated itself */
343 void auth_withpeer_fail(int, int);
344 /* we failed to authenticate ourselves */
345 void auth_withpeer_success(int, int, int);
346 /* we successfully authenticated ourselves */
347 void auth_check_options(void);
348 /* check authentication options supplied */
349 void auth_reset(int); /* check what secrets we have */
350 int check_passwd(int, char *, int, char *, int, char **);
351 /* Check peer-supplied username/password */
352 int get_secret(int, char *, char *, char *, int *, int);
353 /* get "secret" for chap */
354 int get_srp_secret(int unit, char *client, char *server, char *secret,
356 int auth_ip_addr(int, u_int32_t);
357 /* check if IP address is authorized */
358 int auth_number(void); /* check if remote number is authorized */
360 /* Procedures exported from demand.c */
361 void demand_conf(void); /* config interface(s) for demand-dial */
362 void demand_block(void); /* set all NPs to queue up packets */
363 void demand_unblock(void); /* set all NPs to pass packets */
364 void demand_discard(void); /* set all NPs to discard packets */
365 void demand_rexmit(int); /* retransmit saved frames for an NP */
366 int loop_chars(unsigned char *, int); /* process chars from loopback */
367 int loop_frame(unsigned char *, int); /* should we bring link up? */
369 /* Procedures exported from sys-*.c */
370 void sys_init(void); /* Do system-dependent initialization */
371 void sys_cleanup(void); /* Restore system state before exiting */
372 int sys_check_options(void); /* Check options specified */
373 int get_pty(int *, int *, char *, int); /* Get pty master/slave */
374 int open_ppp_loopback(void); /* Open loopback for demand-dialling */
375 int tty_establish_ppp(int); /* Turn serial port into a ppp interface */
376 void tty_disestablish_ppp(int); /* Restore port to normal operation */
377 void make_new_bundle(int, int, int, int); /* Create new bundle */
378 int bundle_attach(int); /* Attach link to existing bundle */
379 void cfg_bundle(int, int, int, int); /* Configure existing bundle */
380 void destroy_bundle(void); /* Tell driver to destroy bundle */
381 void clean_check(void); /* Check if line was 8-bit clean */
382 void set_up_tty(int, int); /* Set up port's speed, parameters, etc. */
383 void restore_tty(int); /* Restore port's original parameters */
384 void setdtr(int, int); /* Raise or lower port's DTR line */
385 void output(int, unsigned char *, int); /* Output a PPP packet */
386 void wait_input(struct timeval *);
387 /* Wait for input, with timeout */
388 void add_fd(int); /* Add fd to set to wait for */
389 void remove_fd(int); /* Remove fd from set to wait for */
390 int read_packet(unsigned char *); /* Read PPP packet */
391 int get_loop_output(void); /* Read pkts from loopback */
392 void tty_send_config(int, u_int32_t, int, int);
393 /* Configure i/f transmit parameters */
394 void tty_set_xaccm(ext_accm);
395 /* Set extended transmit ACCM */
396 void tty_recv_config(int, u_int32_t, int, int);
397 /* Configure i/f receive parameters */
398 int ccp_test(int, unsigned char *, int, int);
399 /* Test support for compression scheme */
400 void ccp_flags_set(int, int, int);
401 /* Set kernel CCP state */
402 int ccp_fatal_error(int); /* Test for fatal decomp error in kernel */
403 int get_idle_time(int, struct ppp_idle *);
404 /* Find out how long link has been idle */
405 int get_ppp_stats(int, struct pppd_stats *);
406 /* Return link statistics */
407 int sifvjcomp(int, int, int, int);
408 /* Configure VJ TCP header compression */
409 int sifup(int); /* Configure i/f up for one protocol */
410 int sifnpmode(int u, int proto, enum NPmode mode);
411 /* Set mode for handling packets for proto */
412 int sifdown(int); /* Configure i/f down for one protocol */
413 int sifaddr(int, u_int32_t, u_int32_t, u_int32_t);
414 /* Configure IPv4 addresses for i/f */
415 int cifaddr(int, u_int32_t, u_int32_t);
416 /* Reset i/f IP addresses */
417 #ifdef PPP_WITH_IPV6CP
418 int sif6up(int); /* Configure i/f up for IPv6 */
419 int sif6down(int); /* Configure i/f down for IPv6 */
420 int sif6addr(int, eui64_t, eui64_t);
421 /* Configure IPv6 addresses for i/f */
422 int cif6addr(int, eui64_t, eui64_t);
423 /* Remove an IPv6 address from i/f */
425 int sifdefaultroute(int, u_int32_t, u_int32_t, bool replace_default_rt);
426 /* Create default route through i/f */
427 int cifdefaultroute(int, u_int32_t, u_int32_t);
428 /* Delete default route through i/f */
429 #ifdef PPP_WITH_IPV6CP
430 int sif6defaultroute(int, eui64_t, eui64_t);
431 /* Create default IPv6 route through i/f */
432 int cif6defaultroute(int, eui64_t, eui64_t);
433 /* Delete default IPv6 route through i/f */
435 int sifproxyarp(int, u_int32_t);
436 /* Add proxy ARP entry for peer */
437 int cifproxyarp(int, u_int32_t);
438 /* Delete proxy ARP entry for peer */
439 u_int32_t GetMask(u_int32_t); /* Get appropriate netmask for address */
440 int mkdir_recursive(const char *); /* Recursively create directory */
441 int lock(char *); /* Create lock file for device */
442 int relock(int); /* Rewrite lock file with new pid */
443 void unlock(void); /* Delete previously-created lock file */
444 void logwtmp(const char *, const char *, const char *);
445 /* Write entry to wtmp file */
446 int get_host_seed(void); /* Get host-dependent random number seed */
447 int have_route_to(u_int32_t); /* Check if route to addr exists */
448 #ifdef PPP_WITH_FILTER
449 int set_filters(struct bpf_program *pass, struct bpf_program *active);
450 /* Set filter programs in kernel */
452 int get_if_hwaddr(unsigned char *addr, char *name);
453 int get_first_ether_hwaddr(unsigned char *addr);
455 /* Procedures exported from options.c */
456 int setipaddr(char *, char **, int); /* Set local/remote ip addresses */
457 int parse_args(int argc, char **argv);
458 /* Parse options from arguments given */
459 int getword(FILE *f, char *word, int *newlinep, char *filename);
460 /* Read a word from a file */
461 int options_from_user(void); /* Parse options from user's .ppprc */
462 int options_for_tty(void); /* Parse options from /etc/ppp/options.tty */
464 int options_from_list(struct wordlist *, int privileged);
465 /* Parse options from a wordlist */
466 void check_options(void); /* check values after all options parsed */
467 int override_value(char *, int, const char *);
468 /* override value if permitted by priority */
469 void print_options(printer_func, void *);
470 /* print out values of all options */
472 /* show all option names and description */
473 int parse_dotted_ip(char *, u_int32_t *);
476 * Inline versions of get/put char/short/long.
477 * Pointer is advanced; we assume that both arguments
478 * are lvalues and will already be in registers.
479 * cp MUST be unsigned char *.
481 #define GETCHAR(c, cp) { \
484 #define PUTCHAR(c, cp) { \
485 *(cp)++ = (unsigned char) (c); \
489 #define GETSHORT(s, cp) { \
490 (s) = *(cp)++ << 8; \
493 #define PUTSHORT(s, cp) { \
494 *(cp)++ = (unsigned char) ((s) >> 8); \
495 *(cp)++ = (unsigned char) (s); \
498 #define GETLONG(l, cp) { \
499 (l) = *(cp)++ << 8; \
500 (l) |= *(cp)++; (l) <<= 8; \
501 (l) |= *(cp)++; (l) <<= 8; \
504 #define PUTLONG(l, cp) { \
505 *(cp)++ = (unsigned char) ((l) >> 24); \
506 *(cp)++ = (unsigned char) ((l) >> 16); \
507 *(cp)++ = (unsigned char) ((l) >> 8); \
508 *(cp)++ = (unsigned char) (l); \
511 #define INCPTR(n, cp) ((cp) += (n))
512 #define DECPTR(n, cp) ((cp) -= (n))
515 * System dependent definitions for user-level 4.3BSD UNIX implementation.
518 #define TIMEOUT(r, f, t) ppp_timeout((r), (f), (t), 0)
519 #define UNTIMEOUT(r, f) ppp_untimeout((r), (f))
521 #define BCOPY(s, d, l) memcpy(d, s, l)
522 #define BZERO(s, n) memset(s, 0, n)
523 #define BCMP(s1, s2, l) memcmp(s1, s2, l)
525 #define PRINTMSG(m, l) { info("Remote message: %0.*v", l, m); }
528 * MAKEHEADER - Add Header fields to a packet.
530 #define MAKEHEADER(p, t) { \
531 PUTCHAR(PPP_ALLSTATIONS, p); \
532 PUTCHAR(PPP_UI, p); \
536 * Debug macros. Slightly useful for finding bugs in pppd, not particularly
537 * useful for finding out why your connection isn't being established.
544 #define DEBUGIPV6CP 1
549 #ifndef LOG_PPP /* we use LOG_LOCAL2 for syslog by default */
550 #if defined(DEBUGMAIN) || defined(DEBUGFSM) || defined(DEBUGSYS) \
551 || defined(DEBUGLCP) || defined(DEBUGIPCP) || defined(DEBUGUPAP) \
552 || defined(DEBUGCHAP) || defined(DEBUG) || defined(DEBUGIPV6CP)
553 #define LOG_PPP LOG_LOCAL2
555 #define LOG_PPP LOG_DAEMON
560 #define MAINDEBUG(x) if (debug) dbglog x
566 #define SYSDEBUG(x) if (debug) dbglog x
572 #define FSMDEBUG(x) if (debug) dbglog x
578 #define LCPDEBUG(x) if (debug) dbglog x
584 #define IPCPDEBUG(x) if (debug) dbglog x
590 #define IPV6CPDEBUG(x) if (debug) dbglog x
592 #define IPV6CPDEBUG(x)
596 #define UPAPDEBUG(x) if (debug) dbglog x
602 #define CHAPDEBUG(x) if (debug) dbglog x
608 #if defined(sun) || defined(SYSV) || defined(POSIX_SOURCE)
612 #endif /* defined(sun) || defined(SYSV) || defined(POSIX_SOURCE) */
616 #define MIN(a, b) ((a) < (b)? (a): (b))
619 #define MAX(a, b) ((a) > (b)? (a): (b))
623 #define offsetof(type, member) ((size_t) &((type *)0)->member)