pppd.h

经典的ppp程序

 */

/* Procedures exported from main.c. */
void set_ifunit __P((int));	/* set stuff that depends on ifunit */
void detach __P((void));	/* Detach from controlling tty */
void die __P((int));		/* Cleanup and exit */
void quit __P((void));		/* like die(1) */
void novm __P((char *));	/* Say we ran out of memory, and die */
void timeout __P((void (*func)(void *), void *arg, int s, int us));
				/* Call func(arg) after s.us seconds */
void untimeout __P((void (*func)(void *), void *arg));
				/* Cancel call to func(arg) */
void record_child __P((int, char *, void (*) (void *), void *));
int  device_script __P((char *cmd, int in, int out, int dont_wait));
				/* Run `cmd' with given stdin and stdout */
pid_t run_program __P((char *prog, char **args, int must_exist,
		       void (*done)(void *), void *arg));
				/* Run program prog with args in child */
void reopen_log __P((void));	/* (re)open the connection to syslog */
void update_link_stats __P((int)); /* Get stats at link termination */
void script_setenv __P((char *, char *, int));	/* set script env var */
void script_unsetenv __P((char *));		/* unset script env var */
void new_phase __P((int));	/* signal start of new phase */
void add_notifier __P((struct notifier **, notify_func, void *));
void remove_notifier __P((struct notifier **, notify_func, void *));
void notify __P((struct notifier *, int));

/* Procedures exported from tty.c. */
void tty_init __P((void));

/* Procedures exported from utils.c. */
void log_packet __P((u_char *, int, char *, int));
				/* Format a packet and log it with syslog */
void print_string __P((char *, int,  void (*) (void *, char *, ...),
		void *));	/* Format a string for output */
int slprintf __P((char *, int, char *, ...));		/* sprintf++ */
int vslprintf __P((char *, int, char *, va_list));	/* vsprintf++ */
size_t strlcpy __P((char *, const char *, size_t));	/* safe strcpy */
size_t strlcat __P((char *, const char *, size_t));	/* safe strncpy */
void dbglog __P((char *, ...));	/* log a debug message */
void info __P((char *, ...));	/* log an informational message */
void notice __P((char *, ...));	/* log a notice-level message */
void warn __P((char *, ...));	/* log a warning message */
void error __P((char *, ...));	/* log an error message */
void fatal __P((char *, ...));	/* log an error message and die(1) */
void init_pr_log __P((char *, int));	/* initialize for using pr_log */
void pr_log __P((void *, char *, ...));	/* printer fn, output to syslog */
void end_pr_log __P((void));	/* finish up after using pr_log */

/* Procedures exported from auth.c */
void link_required __P((int));	  /* we are starting to use the link */
void link_terminated __P((int));  /* we are finished with the link */
void link_down __P((int));	  /* the LCP layer has left the Opened state */
void link_established __P((int)); /* the link is up; authenticate now */
void start_networks __P((void));  /* start all the network control protos */
void np_up __P((int, int));	  /* a network protocol has come up */
void np_down __P((int, int));	  /* a network protocol has gone down */
void np_finished __P((int, int)); /* a network protocol no longer needs link */
void auth_peer_fail __P((int, int));
				/* peer failed to authenticate itself */
void auth_peer_success __P((int, int, char *, int));
				/* peer successfully authenticated itself */
void auth_withpeer_fail __P((int, int));
				/* we failed to authenticate ourselves */
void auth_withpeer_success __P((int, int));
				/* we successfully authenticated ourselves */
void auth_check_options __P((void));
				/* check authentication options supplied */
void auth_reset __P((int));	/* check what secrets we have */
int  check_passwd __P((int, char *, int, char *, int, char **));
				/* Check peer-supplied username/password */
int  get_secret __P((int, char *, char *, char *, int *, int));
				/* get "secret" for chap */
int  auth_ip_addr __P((int, u_int32_t));
				/* check if IP address is authorized */
int  bad_ip_adrs __P((u_int32_t));
				/* check if IP address is unreasonable */

/* Procedures exported from demand.c */
void demand_conf __P((void));	/* config interface(s) for demand-dial */
void demand_block __P((void));	/* set all NPs to queue up packets */
void demand_unblock __P((void)); /* set all NPs to pass packets */
void demand_discard __P((void)); /* set all NPs to discard packets */
void demand_rexmit __P((int));	/* retransmit saved frames for an NP */
int  loop_chars __P((unsigned char *, int)); /* process chars from loopback */
int  loop_frame __P((unsigned char *, int)); /* should we bring link up? */

/* Procedures exported from multilink.c */
void mp_check_options __P((void)); /* Check multilink-related options */
int  mp_join_bundle __P((void));  /* join our link to an appropriate bundle */
char *epdisc_to_str __P((struct epdisc *)); /* string from endpoint discrim. */
int  str_to_epdisc __P((struct epdisc *, char *)); /* endpt disc. from str */

/* Procedures exported from sys-*.c */
void sys_init __P((void));	/* Do system-dependent initialization */
void sys_cleanup __P((void));	/* Restore system state before exiting */
int  sys_check_options __P((void)); /* Check options specified */
void sys_close __P((void));	/* Clean up in a child before execing */
int  ppp_available __P((void));	/* Test whether ppp kernel support exists */
int  get_pty __P((int *, int *, char *, int));	/* Get pty master/slave */
int  open_ppp_loopback __P((void)); /* Open loopback for demand-dialling */
int  tty_establish_ppp __P((int));  /* Turn serial port into a ppp interface */
void tty_disestablish_ppp __P((int)); /* Restore port to normal operation */
void make_new_bundle __P((int, int, int, int)); /* Create new bundle */
int  bundle_attach __P((int));	/* Attach link to existing bundle */
void cfg_bundle __P((int, int, int, int)); /* Configure existing bundle */
void clean_check __P((void));	/* Check if line was 8-bit clean */
void set_up_tty __P((int, int)); /* Set up port's speed, parameters, etc. */
void restore_tty __P((int));	/* Restore port's original parameters */
void setdtr __P((int, int));	/* Raise or lower port's DTR line */
void output __P((int, u_char *, int)); /* Output a PPP packet */
void wait_input __P((struct timeval *));
				/* Wait for input, with timeout */
void add_fd __P((int));		/* Add fd to set to wait for */
void remove_fd __P((int));	/* Remove fd from set to wait for */
int  read_packet __P((u_char *)); /* Read PPP packet */
int  get_loop_output __P((void)); /* Read pkts from loopback */
void tty_send_config __P((int, u_int32_t, int, int));
				/* Configure i/f transmit parameters */
void tty_set_xaccm __P((ext_accm));
				/* Set extended transmit ACCM */
void tty_recv_config __P((int, u_int32_t, int, int));
				/* Configure i/f receive parameters */
int  ccp_test __P((int, u_char *, int, int));
				/* Test support for compression scheme */
void ccp_flags_set __P((int, int, int));
				/* Set kernel CCP state */
int  ccp_fatal_error __P((int)); /* Test for fatal decomp error in kernel */
int  get_idle_time __P((int, struct ppp_idle *));
				/* Find out how long link has been idle */
int  get_ppp_stats __P((int, struct pppd_stats *));
				/* Return link statistics */
void netif_set_mtu __P((int, int)); /* Set PPP interface MTU */
int  sifvjcomp __P((int, int, int, int));
				/* Configure VJ TCP header compression */
int  sifup __P((int));		/* Configure i/f up for one protocol */
int  sifnpmode __P((int u, int proto, enum NPmode mode));
				/* Set mode for handling packets for proto */
int  sifdown __P((int));	/* Configure i/f down for one protocol */
int  sifaddr __P((int, u_int32_t, u_int32_t, u_int32_t));
				/* Configure IPv4 addresses for i/f */
int  cifaddr __P((int, u_int32_t, u_int32_t));
				/* Reset i/f IP addresses */
#ifdef INET6
int  sif6addr __P((int, eui64_t, eui64_t));
				/* Configure IPv6 addresses for i/f */
int  cif6addr __P((int, eui64_t, eui64_t));
				/* Remove an IPv6 address from i/f */
#endif
int  sifdefaultroute __P((int, u_int32_t, u_int32_t));
				/* Create default route through i/f */
int  cifdefaultroute __P((int, u_int32_t, u_int32_t));
				/* Delete default route through i/f */
int  sifproxyarp __P((int, u_int32_t));
				/* Add proxy ARP entry for peer */
int  cifproxyarp __P((int, u_int32_t));
				/* Delete proxy ARP entry for peer */
u_int32_t GetMask __P((u_int32_t)); /* Get appropriate netmask for address */
int  lock __P((char *));	/* Create lock file for device */
int  relock __P((int));		/* Rewrite lock file with new pid */
void unlock __P((void));	/* Delete previously-created lock file */
void logwtmp __P((const char *, const char *, const char *));
				/* Write entry to wtmp file */
int  get_host_seed __P((void));	/* Get host-dependent random number seed */
int  have_route_to __P((u_int32_t)); /* Check if route to addr exists */
#ifdef PPP_FILTER
int  set_filters __P((struct bpf_program *pass, struct bpf_program *active));
				/* Set filter programs in kernel */
#endif
#ifdef IPX_CHANGE
int  sipxfaddr __P((int, unsigned long, unsigned char *));
int  cipxfaddr __P((int));
#endif
int  get_if_hwaddr __P((u_char *addr, char *name));
char *get_first_ethernet __P((void));

/* Procedures exported from options.c */
int  parse_args __P((int argc, char **argv));
				/* Parse options from arguments given */
int  options_from_file __P((char *filename, int must_exist, int check_prot,
			    int privileged));
				/* Parse options from an options file */
int  options_from_user __P((void)); /* Parse options from user's .ppprc */
int  options_for_tty __P((void)); /* Parse options from /etc/ppp/options.tty */
int  options_from_list __P((struct wordlist *, int privileged));
				/* Parse options from a wordlist */
int  getword __P((FILE *f, char *word, int *newlinep, char *filename));
				/* Read a word from a file */
void option_error __P((char *fmt, ...));
				/* Print an error message about an option */
int int_option __P((char *, int *));
				/* Simplified number_option for decimal ints */
void add_options __P((option_t *)); /* Add extra options */
void check_options __P((void));	/* check values after all options parsed */
int  override_value __P((const char *, int, const char *));
				/* override value if permitted by priority */
void print_options __P((void (*) __P((void *, char *, ...)), void *));
				/* print out values of all options */

int parse_dotted_ip __P((char *, u_int32_t *));

/*
 * Hooks to enable plugins to change various things.
 */
extern int (*new_phase_hook) __P((int));
extern int (*idle_time_hook) __P((struct ppp_idle *));
extern int (*holdoff_hook) __P((void));
extern int (*pap_check_hook) __P((void));
extern int (*pap_auth_hook) __P((char *user, char *passwd, char **msgp,
				 struct wordlist **paddrs,
				 struct wordlist **popts));
extern void (*pap_logout_hook) __P((void));
extern int (*pap_passwd_hook) __P((char *user, char *passwd));
extern void (*ip_up_hook) __P((void));
extern void (*ip_down_hook) __P((void));
extern void (*ip_choose_hook) __P((u_int32_t *));

/*
 * Inline versions of get/put char/short/long.
 * Pointer is advanced; we assume that both arguments
 * are lvalues and will already be in registers.
 * cp MUST be u_char *.
 */
#define GETCHAR(c, cp) { \
	(c) = *(cp)++; \
}
#define PUTCHAR(c, cp) { \
	*(cp)++ = (u_char) (c); \
}


#define GETSHORT(s, cp) { \
	(s) = *(cp)++ << 8; \
	(s) |= *(cp)++; \
}
#define PUTSHORT(s, cp) { \
	*(cp)++ = (u_char) ((s) >> 8); \
	*(cp)++ = (u_char) (s); \
}

#define GETLONG(l, cp) { \
	(l) = *(cp)++ << 8; \
	(l) |= *(cp)++; (l) <<= 8; \
	(l) |= *(cp)++; (l) <<= 8; \
	(l) |= *(cp)++; \
}
#define PUTLONG(l, cp) { \
	*(cp)++ = (u_char) ((l) >> 24); \
	*(cp)++ = (u_char) ((l) >> 16); \
	*(cp)++ = (u_char) ((l) >> 8); \
	*(cp)++ = (u_char) (l); \
}

#define INCPTR(n, cp)	((cp) += (n))
#define DECPTR(n, cp)	((cp) -= (n))

/*
 * System dependent definitions for user-level 4.3BSD UNIX implementation.
 */

#define TIMEOUT(r, f, t)	timeout((r), (f), (t), 0)
#define UNTIMEOUT(r, f)		untimeout((r), (f))

#define BCOPY(s, d, l)		memcpy(d, s, l)
#define BZERO(s, n)		memset(s, 0, n)

#define PRINTMSG(m, l)		{ info("Remote message: %0.*v", l, m); }

/*
 * MAKEHEADER - Add Header fields to a packet.
 */
#define MAKEHEADER(p, t) { \
    PUTCHAR(PPP_ALLSTATIONS, p); \
    PUTCHAR(PPP_UI, p); \
    PUTSHORT(t, p); }

/*
 * Exit status values.
 */
#define EXIT_OK			0
#define EXIT_FATAL_ERROR	1
#define EXIT_OPTION_ERROR	2
#define EXIT_NOT_ROOT		3
#define EXIT_NO_KERNEL_SUPPORT	4
#define EXIT_USER_REQUEST	5
#define EXIT_LOCK_FAILED	6
#define EXIT_OPEN_FAILED	7
#define EXIT_CONNECT_FAILED	8
#define EXIT_PTYCMD_FAILED	9
#define EXIT_NEGOTIATION_FAILED	10
#define EXIT_PEER_AUTH_FAILED	11
#define EXIT_IDLE_TIMEOUT	12
#define EXIT_CONNECT_TIME	13
#define EXIT_CALLBACK		14
#define EXIT_PEER_DEAD		15
#define EXIT_HANGUP		16
#define EXIT_LOOPBACK		17
#define EXIT_INIT_FAILED	18
#define EXIT_AUTH_TOPEER_FAILED	19

/*
 * Debug macros.  Slightly useful for finding bugs in pppd, not particularly
 * useful for finding out why your connection isn't being established.
 */
#ifdef DEBUGALL
#define DEBUGMAIN	1
#define DEBUGFSM	1
#define DEBUGLCP	1
#define DEBUGIPCP	1
#define DEBUGIPV6CP	1
#define DEBUGUPAP	1
#define DEBUGCHAP	1
#endif

#ifndef LOG_PPP			/* we use LOG_LOCAL2 for syslog by default */
#if defined(DEBUGMAIN) || defined(DEBUGFSM) || defined(DEBUGSYS) \
  || defined(DEBUGLCP) || defined(DEBUGIPCP) || defined(DEBUGUPAP) \
  || defined(DEBUGCHAP) || defined(DEBUG) || defined(DEBUGIPV6CP)
#define LOG_PPP LOG_LOCAL2
#else
#define LOG_PPP LOG_DAEMON
#endif
#endif /* LOG_PPP */

#ifdef DEBUGMAIN
#define MAINDEBUG(x)	if (debug) dbglog x
#else
#define MAINDEBUG(x)
#endif

#ifdef DEBUGSYS
#define SYSDEBUG(x)	if (debug) dbglog x
#else
#define SYSDEBUG(x)
#endif

#ifdef DEBUGFSM
#define FSMDEBUG(x)	if (debug) dbglog x
#else
#define FSMDEBUG(x)
#endif

#ifdef DEBUGLCP
#define LCPDEBUG(x)	if (debug) dbglog x
#else
#define LCPDEBUG(x)
#endif

#ifdef DEBUGIPCP
#define IPCPDEBUG(x)	if (debug) dbglog x
#else
#define IPCPDEBUG(x)
#endif

#ifdef DEBUGIPV6CP
#define IPV6CPDEBUG(x)  if (debug) dbglog x
#else
#define IPV6CPDEBUG(x)
#endif

#ifdef DEBUGUPAP
#define UPAPDEBUG(x)	if (debug) dbglog x
#else
#define UPAPDEBUG(x)
#endif

#ifdef DEBUGCHAP
#define CHAPDEBUG(x)	if (debug) dbglog x
#else
#define CHAPDEBUG(x)
#endif

#ifdef DEBUGIPXCP
#define IPXCPDEBUG(x)	if (debug) dbglog x
#else
#define IPXCPDEBUG(x)
#endif

#ifndef SIGTYPE
#if defined(sun) || defined(SYSV) || defined(POSIX_SOURCE)
#define SIGTYPE void
#else
#define SIGTYPE int
#endif /* defined(sun) || defined(SYSV) || defined(POSIX_SOURCE) */
#endif /* SIGTYPE */

#ifndef MIN
#define MIN(a, b)	((a) < (b)? (a): (b))
#endif
#ifndef MAX
#define MAX(a, b)	((a) > (b)? (a): (b))
#endif

#endif /* __PPP_H__ */