510 lines
17 KiB
C
510 lines
17 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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* $FreeBSD$
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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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#if __STDC__
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#include <stdarg.h>
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#define __V(x) x
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#else
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#include <varargs.h>
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#define __V(x) (va_alist) va_dcl
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#define const
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#endif
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#ifdef INET6
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#include "eui64.h"
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#endif
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/*
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* Limits.
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*/
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#define NUM_PPP 1 /* One PPP interface supported (per process) */
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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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extern int redirect_stderr;/* Connector's stderr should go to file */
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extern char peer_authname[];/* Authenticated name of peer */
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extern int privileged; /* We were run by real-uid root */
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extern int need_holdoff; /* Need holdoff period after link terminates */
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extern char **script_env; /* Environment variables for scripts */
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extern int detached; /* Have detached from controlling tty */
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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 max_con_attempts;/* Maximum number of times to try dialing */
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extern int maxconnect; /* Maximum connect time (seconds) */
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extern char user[]; /* Our name for authenticating ourselves */
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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 explicit_remote;/* remote_name specified with remotename opt */
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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 int refuse_pap; /* Don't wanna auth. ourselves with PAP */
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extern int refuse_chap; /* Don't wanna auth. ourselves with CHAP */
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#ifdef PPP_FILTER
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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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#endif
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#ifdef MSLANMAN
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extern int ms_lanman; /* Nonzero if use LanMan password instead of NT */
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/* Has meaning only with MS-CHAP challenges */
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#endif
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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_INITIALIZE 1
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#define PHASE_DORMANT 2
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#define PHASE_ESTABLISH 3
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#define PHASE_AUTHENTICATE 4
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#define PHASE_CALLBACK 5
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#define PHASE_NETWORK 6
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#define PHASE_TERMINATE 7
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#define PHASE_HOLDOFF 8
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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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/* Initialization procedure */
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void (*init)(int unit);
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/* Process a received packet */
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void (*input)(int unit, u_char *pkt, int len);
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/* Process a received protocol-reject */
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void (*protrej)(int unit);
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/* Lower layer has come up */
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void (*lowerup)(int unit);
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/* Lower layer has gone down */
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void (*lowerdown)(int unit);
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/* Open the protocol */
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void (*open)(int unit);
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/* Close the protocol */
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void (*close)(int unit, char *reason);
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/* Print a packet in readable form */
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int (*printpkt)(u_char *pkt, int len,
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void (*printer)(void *, char *, ...),
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void *arg);
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/* Process a received data packet */
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void (*datainput)(int unit, u_char *pkt, int len);
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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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/* Check requested options, assign defaults */
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void (*check_options)(void);
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/* Configure interface for demand-dial */
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int (*demand_conf)(int unit);
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/* Say whether to bring up link for this pkt */
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int (*active_pkt)(u_char *pkt, int len);
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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 detach(void); /* Detach from controlling tty */
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void die(int); /* Cleanup and exit */
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void quit(void); /* like die(1) */
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void novm(char *); /* Say we ran out of memory, and die */
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void timeout(void (*func)(void *), void *arg, int t);
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/* Call func(arg) after t seconds */
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void untimeout(void (*func)(void *), void *arg);
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/* Cancel call to func(arg) */
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int run_program(char *prog, char **args, int must_exist);
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/* Run program prog with args in child */
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void demuxprotrej(int, int);
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/* Demultiplex a Protocol-Reject */
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void format_packet(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(u_char *, int, char *, int);
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/* Format a packet and log it with syslog */
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void print_string(char *, int, void (*) (void *, char *, ...),
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void *); /* Format a string for output */
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int fmtmsg(char *, int, char *, ...); /* sprintf++ */
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int vfmtmsg(char *, int, char *, va_list); /* vsprintf++ */
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void script_setenv(char *, char *); /* set script env var */
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void script_unsetenv(char *); /* unset script env var */
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/* Procedures exported from auth.c */
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void link_required(int); /* we are starting to use the link */
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void link_terminated(int); /* we are finished with the link */
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void link_down(int); /* the LCP layer has left the Opened state */
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void link_established(int); /* the link is up; authenticate now */
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void np_up(int, int); /* a network protocol has come up */
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void np_down(int, int); /* a network protocol has gone down */
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void np_finished(int, int); /* a network protocol no longer needs link */
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void auth_peer_fail(int, int);
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/* peer failed to authenticate itself */
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void auth_peer_success(int, int, char *, int);
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/* peer successfully authenticated itself */
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void auth_withpeer_fail(int, int);
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/* we failed to authenticate ourselves */
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void auth_withpeer_success(int, int);
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/* we successfully authenticated ourselves */
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void auth_check_options(void);
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/* check authentication options supplied */
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void auth_reset(int); /* check what secrets we have */
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int check_passwd(int, char *, int, char *, int, char **, int *);
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/* Check peer-supplied username/password */
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int get_secret(int, char *, char *, char *, int *, int);
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/* get "secret" for chap */
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int auth_ip_addr(int, u_int32_t);
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/* check if IP address is authorized */
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int bad_ip_adrs(u_int32_t);
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/* check if IP address is unreasonable */
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void check_access(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(void); /* config interface(s) for demand-dial */
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void demand_block(void); /* set all NPs to queue up packets */
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void demand_unblock(void); /* set all NPs to pass packets */
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void demand_discard(void); /* set all NPs to discard packets */
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void demand_rexmit(int); /* retransmit saved frames for an NP */
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int loop_chars(unsigned char *, int); /* process chars from loopback */
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int loop_frame(unsigned char *, int); /* process frame from loopback */
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/* Procedures exported from sys-*.c */
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void sys_init(void); /* Do system-dependent initialization */
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void sys_cleanup(void); /* Restore system state before exiting */
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void sys_check_options(void); /* Check options specified */
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void sys_close(void); /* Clean up in a child before execing */
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int ppp_available(void); /* Test whether ppp kernel support exists */
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void open_ppp_loopback(void); /* Open loopback for demand-dialling */
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void establish_ppp(int); /* Turn serial port into a ppp interface */
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void restore_loop(void); /* Transfer ppp unit back to loopback */
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void disestablish_ppp(int); /* Restore port to normal operation */
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void clean_check(void); /* Check if line was 8-bit clean */
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void set_up_tty(int, int); /* Set up port's speed, parameters, etc. */
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void restore_tty(int); /* Restore port's original parameters */
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void setdtr(int, int); /* Raise or lower port's DTR line */
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void output(int, u_char *, int); /* Output a PPP packet */
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void wait_input(struct timeval *);
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/* Wait for input, with timeout */
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void wait_loop_output(struct timeval *);
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/* Wait for pkt from loopback, with timeout */
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void wait_time(struct timeval *); /* Wait for given length of time */
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int read_packet(u_char *); /* Read PPP packet */
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int get_loop_output(void); /* Read pkts from loopback */
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void ppp_send_config(int, int, u_int32_t, int, int);
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/* Configure i/f transmit parameters */
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void ppp_set_xaccm(int, ext_accm);
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/* Set extended transmit ACCM */
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void ppp_recv_config(int, int, u_int32_t, int, int);
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/* Configure i/f receive parameters */
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int ccp_test(int, u_char *, int, int);
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/* Test support for compression scheme */
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void ccp_flags_set(int, int, int);
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/* Set kernel CCP state */
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int ccp_fatal_error(int); /* Test for fatal decomp error in kernel */
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int get_idle_time(int, struct ppp_idle *);
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/* Find out how long link has been idle */
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int sifvjcomp(int, int, int, int);
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/* Configure VJ TCP header compression */
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int sifup(int); /* Configure i/f up (for IP) */
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int sifnpmode(int u, int proto, enum NPmode mode);
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/* Set mode for handling packets for proto */
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int sifdown(int); /* Configure i/f down (for IP) */
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int sifaddr(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(int, u_int32_t, u_int32_t);
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/* Reset i/f IP addresses */
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#ifdef INET6
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int sif6addr(int, eui64_t, eui64_t);
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/* Configure IPv6 addresses for i/f */
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int cif6addr(int, eui64_t, eui64_t);
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/* Remove an IPv6 address from i/f */
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#endif
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int sifdefaultroute(int, u_int32_t, u_int32_t);
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/* Create default route through i/f */
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int cifdefaultroute(int, u_int32_t, u_int32_t);
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/* Delete default route through i/f */
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int sifproxyarp(int, u_int32_t);
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/* Add proxy ARP entry for peer */
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int cifproxyarp(int, u_int32_t);
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/* Delete proxy ARP entry for peer */
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u_int32_t GetMask(u_int32_t); /* Get appropriate netmask for address */
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int lock(char *); /* Create lock file for device */
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void unlock(void); /* Delete previously-created lock file */
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int daemon(int, int); /* Detach us from terminal session */
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void logwtmp(const char *, const char *, const char *);
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/* Write entry to wtmp file */
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int get_host_seed(void); /* Get host-dependent random number seed */
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#ifdef PPP_FILTER
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int set_filters(struct bpf_program *pass, struct bpf_program *active);
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/* Set filter programs in kernel */
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#endif
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/* Procedures exported from options.c */
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int parse_args(int argc, char **argv);
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/* Parse options from arguments given */
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void usage(void); /* Print a usage message */
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int options_from_file(char *filename, int must_exist, int check_prot,
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int privileged);
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/* Parse options from an options file */
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int options_from_user(void); /* Parse options from user's .ppprc */
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int options_for_tty(void); /* Parse options from /etc/ppp/options.tty */
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void scan_args(int argc, char **argv);
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/* Look for tty name in command-line args */
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int getword(FILE *f, char *word, int *newlinep, char *filename);
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/* Read a word from a file */
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void option_error(char *fmt, ...);
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/* Print an error message about an option */
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int setipaddr(char *); /* set IP addresses */
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/*
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* This structure is used to store information about certain
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* options, such as where the option value came from (/etc/ppp/options,
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* command line, etc.) and whether it came from a privileged source.
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*/
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struct option_info {
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int priv; /* was value set by sysadmin? */
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char *source; /* where option came from */
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};
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extern struct option_info auth_req_info;
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extern struct option_info connector_info;
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extern struct option_info disconnector_info;
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extern struct option_info welcomer_info;
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extern struct option_info devnam_info;
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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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|
|
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#ifdef DEBUGLCP
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|
#define LCPDEBUG(x) if (debug) syslog x
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|
#else
|
|
#define LCPDEBUG(x)
|
|
#endif
|
|
|
|
#ifdef DEBUGIPCP
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|
#define IPCPDEBUG(x) if (debug) syslog x
|
|
#else
|
|
#define IPCPDEBUG(x)
|
|
#endif
|
|
|
|
#ifdef DEBUGIPV6CP
|
|
#define IPV6CPDEBUG(x) if (debug) syslog x
|
|
#else
|
|
#define IPV6CPDEBUG(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
|
|
|
|
#ifdef DEBUGIPXCP
|
|
#define IPXCPDEBUG(x) if (debug) syslog 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__ */
|