414 lines
15 KiB
C
414 lines
15 KiB
C
/*
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* pppd.h - PPP daemon global declarations.
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*
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* Copyright (c) 1989 Carnegie Mellon University.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by Carnegie Mellon University. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* $Id: pppd.h,v 1.8 1996/03/15 03:04:06 paulus Exp $
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*/
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/*
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* TODO:
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*/
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#ifndef __PPPD_H__
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#define __PPPD_H__
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#include <stdio.h> /* for FILE */
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#include <sys/param.h> /* for MAXPATHLEN and BSD4_4, if defined */
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#include <sys/types.h> /* for u_int32_t, if defined */
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#include <sys/time.h> /* for struct timeval */
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#include <net/ppp_defs.h>
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#include <net/bpf.h>
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#define NUM_PPP 1 /* One PPP interface supported (per process) */
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/*
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* Limits.
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*/
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#define MAXWORDLEN 1024 /* max length of word in file (incl null) */
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#define MAXARGS 1 /* max # args to a command */
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#define MAXNAMELEN 256 /* max length of hostname or name for auth */
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#define MAXSECRETLEN 256 /* max length of password or secret */
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/*
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* Global variables.
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*/
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extern int hungup; /* Physical layer has disconnected */
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extern int ifunit; /* Interface unit number */
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extern char ifname[]; /* Interface name */
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extern int ttyfd; /* Serial device file descriptor */
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extern char hostname[]; /* Our hostname */
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extern u_char outpacket_buf[]; /* Buffer for outgoing packets */
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extern int phase; /* Current state of link - see values below */
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extern int baud_rate; /* Current link speed in bits/sec */
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extern char *progname; /* Name of this program */
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/*
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* Variables set by command-line options.
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*/
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extern int debug; /* Debug flag */
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extern int kdebugflag; /* Tell kernel to print debug messages */
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extern int default_device; /* Using /dev/tty or equivalent */
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extern char devnam[]; /* Device name */
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extern int crtscts; /* Use hardware flow control */
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extern int modem; /* Use modem control lines */
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extern int inspeed; /* Input/Output speed requested */
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extern u_int32_t netmask; /* IP netmask to set on interface */
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extern int lockflag; /* Create lock file to lock the serial dev */
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extern int nodetach; /* Don't detach from controlling tty */
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extern char *connector; /* Script to establish physical link */
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extern char *disconnector; /* Script to disestablish physical link */
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extern char *welcomer; /* Script to welcome client after connection */
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extern int maxconnect; /* maximum number of seconds for a connection */
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extern char user[]; /* Username for PAP */
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extern char passwd[]; /* Password for PAP */
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extern int auth_required; /* Peer is required to authenticate */
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extern int proxyarp; /* Set up proxy ARP entry for peer */
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extern int persist; /* Reopen link after it goes down */
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extern int uselogin; /* Use /etc/passwd for checking PAP */
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extern int lcp_echo_interval; /* Interval between LCP echo-requests */
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extern int lcp_echo_fails; /* Tolerance to unanswered echo-requests */
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extern char our_name[]; /* Our name for authentication purposes */
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extern char remote_name[]; /* Peer's name for authentication */
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extern int usehostname; /* Use hostname for our_name */
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extern int disable_defaultip; /* Don't use hostname for default IP adrs */
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extern int demand; /* Do dial-on-demand */
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extern char *ipparam; /* Extra parameter for ip up/down scripts */
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extern int cryptpap; /* Others' PAP passwords are encrypted */
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extern int idle_time_limit;/* Shut down link if idle for this long */
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extern int holdoff; /* Dead time before restarting */
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extern struct bpf_program pass_filter; /* Filter for pkts to pass */
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extern struct bpf_program active_filter; /* Filter for link-active pkts */
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/*
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* Values for phase.
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*/
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#define PHASE_DEAD 0
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#define PHASE_DORMANT 1
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#define PHASE_ESTABLISH 2
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#define PHASE_AUTHENTICATE 3
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#define PHASE_NETWORK 4
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#define PHASE_TERMINATE 5
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#define PHASE_HOLDOFF 6
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/*
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* The following struct gives the addresses of procedures to call
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* for a particular protocol.
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*/
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struct protent {
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u_short protocol; /* PPP protocol number */
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void (*init)(); /* Initialization procedure */
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void (*input)(); /* Process a received packet */
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void (*protrej)(); /* Process a received protocol-reject */
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void (*lowerup)(); /* Lower layer has come up */
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void (*lowerdown)(); /* Lower layer has gone down */
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void (*open)(); /* Open the protocol */
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void (*close)(); /* Close the protocol */
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int (*printpkt)(); /* Print a packet in readable form */
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void (*datainput)(); /* Process a received data packet */
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int enabled_flag; /* 0 iff protocol is disabled */
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char *name; /* Text name of protocol */
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void (*check_options)(); /* Check requested options, assign dflts */
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int (*demand_conf)(); /* Configure interface for demand-dial */
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};
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/* Table of pointers to supported protocols */
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extern struct protent *protocols[];
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/*
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* Prototypes.
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*/
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/* Procedures exported from main.c. */
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void die __P((int)); /* Cleanup and exit */
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void quit __P((void)); /* like die(1) */
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void novm __P((char *)); /* Say we ran out of memory, and die */
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void timeout __P((void (*func)(), caddr_t arg, int t));
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/* Call func(arg) after t seconds */
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void untimeout __P((void (*func)(), caddr_t arg));
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/* Cancel call to func(arg) */
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int run_program __P((char *prog, char **args, int must_exist));
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/* Run program prog with args in child */
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void demuxprotrej __P((int, int));
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/* Demultiplex a Protocol-Reject */
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void format_packet __P((u_char *, int, void (*) (void *, char *, ...),
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void *)); /* Format a packet in human-readable form */
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void log_packet __P((u_char *, int, char *));
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/* Format a packet and log it with syslog */
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void print_string __P((char *, int, void (*) (void *, char *, ...),
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void *)); /* Format a string for output */
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/* Procedures exported from auth.c */
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void link_required __P((int)); /* we are starting to use the link */
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void link_terminated __P((int)); /* we are finished with the link */
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void link_down __P((int)); /* the LCP layer has left the Opened state */
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void link_established __P((int)); /* the link is up; authenticate now */
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void np_up __P((int, int)); /* a network protocol has come up */
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void np_down __P((int, int)); /* a network protocol has gone down */
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void np_finished __P((int, int)); /* a network protocol no longer needs link */
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void auth_peer_fail __P((int, int));
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/* peer failed to authenticate itself */
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void auth_peer_success __P((int, int));
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/* peer successfully authenticated itself */
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void auth_withpeer_fail __P((int, int));
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/* we failed to authenticate ourselves */
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void auth_withpeer_success __P((int, int));
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/* we successfully authenticated ourselves */
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void auth_check_options __P((void));
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/* check authentication options supplied */
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int check_passwd __P((int, char *, int, char *, int, char **, int *));
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/* Check peer-supplied username/password */
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int get_secret __P((int, char *, char *, char *, int *, int));
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/* get "secret" for chap */
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int auth_ip_addr __P((int, u_int32_t));
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/* check if IP address is authorized */
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int bad_ip_adrs __P((u_int32_t));
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/* check if IP address is unreasonable */
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void check_access __P((FILE *, char *));
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/* check permissions on secrets file */
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/* Procedures exported from demand.c */
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void demand_conf __P((void)); /* config interface(s) for demand-dial */
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void demand_block __P((void)); /* set all NPs to queue up packets */
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void demand_unblock __P((void)); /* set all NPs to pass packets */
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void demand_discard __P((void)); /* set all NPs to discard packets */
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void demand_rexmit __P((int)); /* retransmit saved frames for an NP */
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int loop_chars __P((unsigned char *, int)); /* process chars from loopback */
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int loop_frame __P((unsigned char *, int)); /* process frame from loopback */
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/* Procedures exported from sys-*.c */
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void sys_init __P((void)); /* Do system-dependent initialization */
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void sys_cleanup __P((void)); /* Restore system state before exiting */
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void sys_check_options __P((void)); /* Check options specified */
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void sys_close __P((void)); /* Clean up in a child before execing */
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void note_debug_level __P((void)); /* Note change in debug level */
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int ppp_available __P((void)); /* Test whether ppp kernel support exists */
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void open_ppp_loopback __P((void)); /* Open loopback for demand-dialling */
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void establish_ppp __P((int)); /* Turn serial port into a ppp interface */
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void restore_loop __P((void)); /* Transfer ppp unit back to loopback */
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void disestablish_ppp __P((int)); /* Restore port to normal operation */
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void clean_check __P((void)); /* Check if line was 8-bit clean */
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void set_up_tty __P((int, int)); /* Set up port's speed, parameters, etc. */
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void restore_tty __P((int)); /* Restore port's original parameters */
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void setdtr __P((int, int)); /* Raise or lower port's DTR line */
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void output __P((int, u_char *, int)); /* Output a PPP packet */
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void wait_input __P((struct timeval *));
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/* Wait for input, with timeout */
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void wait_loop_output __P((struct timeval *));
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/* Wait for pkt from loopback, with timeout */
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void wait_time __P((struct timeval *)); /* Wait for given length of time */
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int read_packet __P((u_char *)); /* Read PPP packet */
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int get_loop_output __P((void)); /* Read pkts from loopback */
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void ppp_send_config __P((int, int, u_int32_t, int, int));
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/* Configure i/f transmit parameters */
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void ppp_set_xaccm __P((int, ext_accm));
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/* Set extended transmit ACCM */
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void ppp_recv_config __P((int, int, u_int32_t, int, int));
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/* Configure i/f receive parameters */
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int ccp_test __P((int, u_char *, int, int));
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/* Test support for compression scheme */
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void ccp_flags_set __P((int, int, int));
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/* Set kernel CCP state */
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int ccp_fatal_error __P((int)); /* Test for fatal decomp error in kernel */
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int get_idle_time __P((int, struct ppp_idle *));
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/* Find out how long link has been idle */
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int sifvjcomp __P((int, int, int, int));
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/* Configure VJ TCP header compression */
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int sifup __P((int)); /* Configure i/f up (for IP) */
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int sifnpmode __P((int u, int proto, enum NPmode mode));
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/* Set mode for handling packets for proto */
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int sifdown __P((int)); /* Configure i/f down (for IP) */
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int sifaddr __P((int, u_int32_t, u_int32_t, u_int32_t));
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/* Configure IP addresses for i/f */
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int cifaddr __P((int, u_int32_t, u_int32_t));
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/* Reset i/f IP addresses */
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int sifdefaultroute __P((int, u_int32_t));
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/* Create default route through i/f */
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int cifdefaultroute __P((int, u_int32_t));
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/* Delete default route through i/f */
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int sifproxyarp __P((int, u_int32_t));
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/* Add proxy ARP entry for peer */
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int cifproxyarp __P((int, u_int32_t));
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/* Delete proxy ARP entry for peer */
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u_int32_t GetMask __P((u_int32_t)); /* Get appropriate netmask for address */
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int lock __P((char *)); /* Create lock file for device */
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void unlock __P((void)); /* Delete previously-created lock file */
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int daemon __P((int, int)); /* Detach us from terminal session */
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int logwtmp __P((char *, char *, char *));
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/* Write entry to wtmp file */
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int set_filters __P((struct bpf_program *pass, struct bpf_program *active));
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/* Set filter programs in kernel */
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/* Procedures exported from options.c */
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int parse_args __P((int argc, char **argv));
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/* Parse options from arguments given */
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void usage __P((void)); /* Print a usage message */
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int options_from_file __P((char *filename, int must_exist, int check_prot));
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/* Parse options from an options file */
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int options_from_user __P((void)); /* Parse options from user's .ppprc */
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int options_for_tty __P((void)); /* Parse options from /etc/ppp/options.tty */
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int getword __P((FILE *f, char *word, int *newlinep, char *filename));
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/* Read a word from a file */
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/*
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* Inline versions of get/put char/short/long.
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* Pointer is advanced; we assume that both arguments
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* are lvalues and will already be in registers.
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* cp MUST be u_char *.
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*/
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#define GETCHAR(c, cp) { \
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(c) = *(cp)++; \
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}
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#define PUTCHAR(c, cp) { \
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*(cp)++ = (u_char) (c); \
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}
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#define GETSHORT(s, cp) { \
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(s) = *(cp)++ << 8; \
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(s) |= *(cp)++; \
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}
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#define PUTSHORT(s, cp) { \
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*(cp)++ = (u_char) ((s) >> 8); \
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*(cp)++ = (u_char) (s); \
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}
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#define GETLONG(l, cp) { \
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(l) = *(cp)++ << 8; \
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(l) |= *(cp)++; (l) <<= 8; \
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(l) |= *(cp)++; (l) <<= 8; \
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(l) |= *(cp)++; \
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}
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#define PUTLONG(l, cp) { \
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*(cp)++ = (u_char) ((l) >> 24); \
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*(cp)++ = (u_char) ((l) >> 16); \
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*(cp)++ = (u_char) ((l) >> 8); \
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*(cp)++ = (u_char) (l); \
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}
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#define INCPTR(n, cp) ((cp) += (n))
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#define DECPTR(n, cp) ((cp) -= (n))
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#undef FALSE
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#define FALSE 0
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#undef TRUE
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#define TRUE 1
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/*
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* System dependent definitions for user-level 4.3BSD UNIX implementation.
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*/
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#define DEMUXPROTREJ(u, p) demuxprotrej(u, p)
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#define TIMEOUT(r, f, t) timeout((r), (f), (t))
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#define UNTIMEOUT(r, f) untimeout((r), (f))
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#define BCOPY(s, d, l) memcpy(d, s, l)
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#define BZERO(s, n) memset(s, 0, n)
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#define EXIT(u) quit()
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#define PRINTMSG(m, l) { m[l] = '\0'; syslog(LOG_INFO, "Remote message: %s", m); }
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/*
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* MAKEHEADER - Add Header fields to a packet.
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*/
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#define MAKEHEADER(p, t) { \
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PUTCHAR(PPP_ALLSTATIONS, p); \
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PUTCHAR(PPP_UI, p); \
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PUTSHORT(t, p); }
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#ifdef DEBUGALL
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#define DEBUGMAIN 1
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#define DEBUGFSM 1
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#define DEBUGLCP 1
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#define DEBUGIPCP 1
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#define DEBUGUPAP 1
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#define DEBUGCHAP 1
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#endif
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#ifndef LOG_PPP /* we use LOG_LOCAL2 for syslog by default */
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#if defined(DEBUGMAIN) || defined(DEBUGFSM) || defined(DEBUGSYS) \
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|| defined(DEBUGLCP) || defined(DEBUGIPCP) || defined(DEBUGUPAP) \
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|| defined(DEBUGCHAP) || defined(DEBUG)
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#define LOG_PPP LOG_LOCAL2
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#else
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#define LOG_PPP LOG_DAEMON
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#endif
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#endif /* LOG_PPP */
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#ifdef DEBUGMAIN
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#define MAINDEBUG(x) if (debug) syslog x
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#else
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#define MAINDEBUG(x)
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#endif
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#ifdef DEBUGSYS
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#define SYSDEBUG(x) if (debug) syslog x
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#else
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#define SYSDEBUG(x)
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#endif
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#ifdef DEBUGFSM
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#define FSMDEBUG(x) if (debug) syslog x
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#else
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#define FSMDEBUG(x)
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#endif
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#ifdef DEBUGLCP
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#define LCPDEBUG(x) if (debug) syslog x
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#else
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#define LCPDEBUG(x)
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#endif
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#ifdef DEBUGIPCP
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#define IPCPDEBUG(x) if (debug) syslog x
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#else
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#define IPCPDEBUG(x)
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#endif
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#ifdef DEBUGUPAP
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#define UPAPDEBUG(x) if (debug) syslog x
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#else
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#define UPAPDEBUG(x)
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#endif
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#ifdef DEBUGCHAP
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#define CHAPDEBUG(x) if (debug) syslog x
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#else
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#define CHAPDEBUG(x)
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#endif
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#ifndef SIGTYPE
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#if defined(sun) || defined(SYSV) || defined(POSIX_SOURCE)
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#define SIGTYPE void
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#else
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#define SIGTYPE int
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#endif /* defined(sun) || defined(SYSV) || defined(POSIX_SOURCE) */
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#endif /* SIGTYPE */
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#ifndef MIN
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#define MIN(a, b) ((a) < (b)? (a): (b))
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#endif
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#ifndef MAX
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#define MAX(a, b) ((a) > (b)? (a): (b))
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#endif
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#endif /* __PPP_H__ */
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