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NetBSD/usr.sbin/pppd/pppd.h
paulus 44c91c8e53 Several enhancements and bug-fixes to the PPP daemon, including new 
support for demand dialling, packet filtering, idle timeout, multiple
packet compression schemes (including PPP Deflate), and a limit on
connect time.
1996-03-15 03:03:34 +00:00

414 lines
15 KiB
C
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/*
* pppd.h - PPP daemon global declarations.
*
* Copyright (c) 1989 Carnegie Mellon University.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by Carnegie Mellon University. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* $Id: pppd.h,v 1.8 1996/03/15 03:04:06 paulus Exp $
*/
/*
* TODO:
*/
#ifndef __PPPD_H__
#define __PPPD_H__
#include <stdio.h> /* for FILE */
#include <sys/param.h> /* for MAXPATHLEN and BSD4_4, if defined */
#include <sys/types.h> /* for u_int32_t, if defined */
#include <sys/time.h> /* for struct timeval */
#include <net/ppp_defs.h>
#include <net/bpf.h>
#define NUM_PPP 1 /* One PPP interface supported (per process) */
/*
* Limits.
*/
#define MAXWORDLEN 1024 /* max length of word in file (incl null) */
#define MAXARGS 1 /* max # args to a command */
#define MAXNAMELEN 256 /* max length of hostname or name for auth */
#define MAXSECRETLEN 256 /* max length of password or secret */
/*
* Global variables.
*/
extern int hungup; /* Physical layer has disconnected */
extern int ifunit; /* Interface unit number */
extern char ifname[]; /* Interface name */
extern int ttyfd; /* Serial device file descriptor */
extern char hostname[]; /* Our hostname */
extern u_char outpacket_buf[]; /* Buffer for outgoing packets */
extern int phase; /* Current state of link - see values below */
extern int baud_rate; /* Current link speed in bits/sec */
extern char *progname; /* Name of this program */
/*
* Variables set by command-line options.
*/
extern int debug; /* Debug flag */
extern int kdebugflag; /* Tell kernel to print debug messages */
extern int default_device; /* Using /dev/tty or equivalent */
extern char devnam[]; /* Device name */
extern int crtscts; /* Use hardware flow control */
extern int modem; /* Use modem control lines */
extern int inspeed; /* Input/Output speed requested */
extern u_int32_t netmask; /* IP netmask to set on interface */
extern int lockflag; /* Create lock file to lock the serial dev */
extern int nodetach; /* Don't detach from controlling tty */
extern char *connector; /* Script to establish physical link */
extern char *disconnector; /* Script to disestablish physical link */
extern char *welcomer; /* Script to welcome client after connection */
extern int maxconnect; /* maximum number of seconds for a connection */
extern char user[]; /* Username for PAP */
extern char passwd[]; /* Password for PAP */
extern int auth_required; /* Peer is required to authenticate */
extern int proxyarp; /* Set up proxy ARP entry for peer */
extern int persist; /* Reopen link after it goes down */
extern int uselogin; /* Use /etc/passwd for checking PAP */
extern int lcp_echo_interval; /* Interval between LCP echo-requests */
extern int lcp_echo_fails; /* Tolerance to unanswered echo-requests */
extern char our_name[]; /* Our name for authentication purposes */
extern char remote_name[]; /* Peer's name for authentication */
extern int usehostname; /* Use hostname for our_name */
extern int disable_defaultip; /* Don't use hostname for default IP adrs */
extern int demand; /* Do dial-on-demand */
extern char *ipparam; /* Extra parameter for ip up/down scripts */
extern int cryptpap; /* Others' PAP passwords are encrypted */
extern int idle_time_limit;/* Shut down link if idle for this long */
extern int holdoff; /* Dead time before restarting */
extern struct bpf_program pass_filter; /* Filter for pkts to pass */
extern struct bpf_program active_filter; /* Filter for link-active pkts */
/*
* Values for phase.
*/
#define PHASE_DEAD 0
#define PHASE_DORMANT 1
#define PHASE_ESTABLISH 2
#define PHASE_AUTHENTICATE 3
#define PHASE_NETWORK 4
#define PHASE_TERMINATE 5
#define PHASE_HOLDOFF 6
/*
* The following struct gives the addresses of procedures to call
* for a particular protocol.
*/
struct protent {
u_short protocol; /* PPP protocol number */
void (*init)(); /* Initialization procedure */
void (*input)(); /* Process a received packet */
void (*protrej)(); /* Process a received protocol-reject */
void (*lowerup)(); /* Lower layer has come up */
void (*lowerdown)(); /* Lower layer has gone down */
void (*open)(); /* Open the protocol */
void (*close)(); /* Close the protocol */
int (*printpkt)(); /* Print a packet in readable form */
void (*datainput)(); /* Process a received data packet */
int enabled_flag; /* 0 iff protocol is disabled */
char *name; /* Text name of protocol */
void (*check_options)(); /* Check requested options, assign dflts */
int (*demand_conf)(); /* Configure interface for demand-dial */
};
/* Table of pointers to supported protocols */
extern struct protent *protocols[];
/*
* Prototypes.
*/
/* Procedures exported from main.c. */
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)(), caddr_t arg, int t));
/* Call func(arg) after t seconds */
void untimeout __P((void (*func)(), caddr_t arg));
/* Cancel call to func(arg) */
int run_program __P((char *prog, char **args, int must_exist));
/* Run program prog with args in child */
void demuxprotrej __P((int, int));
/* Demultiplex a Protocol-Reject */
void format_packet __P((u_char *, int, void (*) (void *, char *, ...),
void *)); /* Format a packet in human-readable form */
void log_packet __P((u_char *, int, char *));
/* Format a packet and log it with syslog */
void print_string __P((char *, int, void (*) (void *, char *, ...),
void *)); /* Format a string for output */
/* 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 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));
/* 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 */
int check_passwd __P((int, char *, int, char *, int, char **, int *));
/* 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 */
void check_access __P((FILE *, char *));
/* check permissions on secrets file */
/* 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)); /* process frame from loopback */
/* Procedures exported from sys-*.c */
void sys_init __P((void)); /* Do system-dependent initialization */
void sys_cleanup __P((void)); /* Restore system state before exiting */
void sys_check_options __P((void)); /* Check options specified */
void sys_close __P((void)); /* Clean up in a child before execing */
void note_debug_level __P((void)); /* Note change in debug level */
int ppp_available __P((void)); /* Test whether ppp kernel support exists */
void open_ppp_loopback __P((void)); /* Open loopback for demand-dialling */
void establish_ppp __P((int)); /* Turn serial port into a ppp interface */
void restore_loop __P((void)); /* Transfer ppp unit back to loopback */
void disestablish_ppp __P((int)); /* Restore port to normal operation */
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 wait_loop_output __P((struct timeval *));
/* Wait for pkt from loopback, with timeout */
void wait_time __P((struct timeval *)); /* Wait for given length of time */
int read_packet __P((u_char *)); /* Read PPP packet */
int get_loop_output __P((void)); /* Read pkts from loopback */
void ppp_send_config __P((int, int, u_int32_t, int, int));
/* Configure i/f transmit parameters */
void ppp_set_xaccm __P((int, ext_accm));
/* Set extended transmit ACCM */
void ppp_recv_config __P((int, 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 sifvjcomp __P((int, int, int, int));
/* Configure VJ TCP header compression */
int sifup __P((int)); /* Configure i/f up (for IP) */
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 IP) */
int sifaddr __P((int, u_int32_t, u_int32_t, u_int32_t));
/* Configure IP addresses for i/f */
int cifaddr __P((int, u_int32_t, u_int32_t));
/* Reset i/f IP addresses */
int sifdefaultroute __P((int, u_int32_t));
/* Create default route through i/f */
int cifdefaultroute __P((int, 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 */
void unlock __P((void)); /* Delete previously-created lock file */
int daemon __P((int, int)); /* Detach us from terminal session */
int logwtmp __P((char *, char *, char *));
/* Write entry to wtmp file */
int set_filters __P((struct bpf_program *pass, struct bpf_program *active));
/* Set filter programs in kernel */
/* Procedures exported from options.c */
int parse_args __P((int argc, char **argv));
/* Parse options from arguments given */
void usage __P((void)); /* Print a usage message */
int options_from_file __P((char *filename, int must_exist, int check_prot));
/* 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 getword __P((FILE *f, char *word, int *newlinep, char *filename));
/* Read a word from a file */
/*
* 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))
#undef FALSE
#define FALSE 0
#undef TRUE
#define TRUE 1
/*
* System dependent definitions for user-level 4.3BSD UNIX implementation.
*/
#define DEMUXPROTREJ(u, p) demuxprotrej(u, p)
#define TIMEOUT(r, f, t) timeout((r), (f), (t))
#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 EXIT(u) quit()
#define PRINTMSG(m, l) { m[l] = '\0'; syslog(LOG_INFO, "Remote message: %s", m); }
/*
* MAKEHEADER - Add Header fields to a packet.
*/
#define MAKEHEADER(p, t) { \
PUTCHAR(PPP_ALLSTATIONS, p); \
PUTCHAR(PPP_UI, p); \
PUTSHORT(t, p); }
#ifdef DEBUGALL
#define DEBUGMAIN 1
#define DEBUGFSM 1
#define DEBUGLCP 1
#define DEBUGIPCP 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)
#define LOG_PPP LOG_LOCAL2
#else
#define LOG_PPP LOG_DAEMON
#endif
#endif /* LOG_PPP */
#ifdef DEBUGMAIN
#define MAINDEBUG(x) if (debug) syslog x
#else
#define MAINDEBUG(x)
#endif
#ifdef DEBUGSYS
#define SYSDEBUG(x) if (debug) syslog x
#else
#define SYSDEBUG(x)
#endif
#ifdef DEBUGFSM
#define FSMDEBUG(x) if (debug) syslog x
#else
#define FSMDEBUG(x)
#endif
#ifdef DEBUGLCP
#define LCPDEBUG(x) if (debug) syslog x
#else
#define LCPDEBUG(x)
#endif
#ifdef DEBUGIPCP
#define IPCPDEBUG(x) if (debug) syslog x
#else
#define IPCPDEBUG(x)
#endif
#ifdef DEBUGUPAP
#define UPAPDEBUG(x) if (debug) syslog x
#else
#define UPAPDEBUG(x)
#endif
#ifdef DEBUGCHAP
#define CHAPDEBUG(x) if (debug) syslog x
#else
#define CHAPDEBUG(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__ */
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