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ppp/pppd/pppd.h
Paul Mackerras ba0b5df875 [dis]connector -> [dis]connect_script 
connect_delay option
callback infrastructure
1999-12-23 01:29:42 +00:00

672 lines
24 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 1.49 1999/12/23 01:29:42 paulus Exp $
*/
/*
* TODO:
*/
#ifndef __PPPD_H__
#define __PPPD_H__
#include <stdio.h> /* for FILE */
#include <limits.h> /* for NGROUPS_MAX */
#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>
#if defined(__STDC__)
#include <stdarg.h>
#define __V(x) x
#else
#include <varargs.h>
#define __V(x) (va_alist) va_dcl
#define const
#define volatile
#endif
#ifdef INET6
#include "eui64.h"
#endif
/*
* Limits.
*/
#define NUM_PPP 1 /* One PPP interface supported (per process) */
#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 */
/*
* Option descriptor structure.
*/
typedef unsigned char bool;
enum opt_type {
o_special_noarg = 0,
o_special = 1,
o_bool,
o_int,
o_uint32,
o_string,
};
typedef struct {
char *name; /* name of the option */
enum opt_type type;
void *addr;
char *description;
int flags;
void *addr2;
int upper_limit;
int lower_limit;
} option_t;
/* Values for flags */
#define OPT_VALUE 0xff /* mask for presupplied value */
#define OPT_HEX 0x100 /* int option is in hex */
#define OPT_NOARG 0x200 /* option doesn't take argument */
#define OPT_OR 0x400 /* OR in argument to value */
#define OPT_INC 0x800 /* increment value */
#define OPT_PRIV 0x1000 /* privileged option */
#define OPT_STATIC 0x2000 /* string option goes into static array */
#define OPT_LLIMIT 0x4000 /* check value against lower limit */
#define OPT_ULIMIT 0x8000 /* check value against upper limit */
#define OPT_LIMITS (OPT_LLIMIT|OPT_ULIMIT)
#define OPT_ZEROOK 0x10000 /* 0 value is OK even if not within limits */
#define OPT_NOINCR 0x20000 /* value mustn't be increased */
#define OPT_ZEROINF 0x40000 /* with OPT_NOINCR, 0 == infinity */
#define OPT_A2INFO 0x100000 /* addr2 -> option_info to update */
#define OPT_A2COPY 0x200000 /* addr2 -> second location to rcv value */
#define OPT_ENABLE 0x400000 /* use *addr2 as enable for option */
#define OPT_PRIVFIX 0x800000 /* can't be overridden if noauth */
#define OPT_PREPASS 0x1000000 /* do this opt in pre-pass to find device */
#define OPT_INITONLY 0x2000000 /* option can only be set in init phase */
#define OPT_DEVEQUIV 0x4000000 /* equiv to device name */
#define OPT_DEVNAM (OPT_PREPASS | OPT_INITONLY | OPT_DEVEQUIV)
#define OPT_VAL(x) ((x) & OPT_VALUE)
#ifndef GIDSET_TYPE
#define GIDSET_TYPE gid_t
#endif
/* Structure representing a list of permitted IP addresses. */
struct permitted_ip {
int permit; /* 1 = permit, 0 = forbid */
u_int32_t base; /* match if (addr & mask) == base */
u_int32_t mask; /* base and mask are in network byte order */
};
/*
* Unfortunately, the linux kernel driver uses a different structure
* for statistics from the rest of the ports.
* This structure serves as a common representation for the bits
* pppd needs.
*/
struct pppd_stats {
unsigned int bytes_in;
unsigned int bytes_out;
};
/* Used for storing a sequence of words. Usually malloced. */
struct wordlist {
struct wordlist *next;
char *word;
};
/*
* 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 */
extern int redirect_stderr;/* Connector's stderr should go to file */
extern char peer_authname[];/* Authenticated name of peer */
extern int privileged; /* We were run by real-uid root */
extern int need_holdoff; /* Need holdoff period after link terminates */
extern char **script_env; /* Environment variables for scripts */
extern int detached; /* Have detached from controlling tty */
extern GIDSET_TYPE groups[NGROUPS_MAX]; /* groups the user is in */
extern int ngroups; /* How many groups valid in groups */
extern struct pppd_stats link_stats; /* byte/packet counts etc. for link */
extern int link_stats_valid; /* set if link_stats is valid */
extern int link_connect_time; /* time the link was up for */
extern int using_pty; /* using pty as device (notty or pty opt.) */
extern int log_to_fd; /* logging to this fd as well as syslog */
extern char *no_ppp_msg; /* message to print if ppp not in kernel */
extern volatile int status; /* exit status for pppd */
extern int devnam_fixed; /* can no longer change devnam */
extern int unsuccess; /* # unsuccessful connection attempts */
extern int do_callback; /* set if we want to do callback next */
extern int doing_callback; /* set if this is a callback */
/* Values for do_callback and doing_callback */
#define CALLBACK_DIALIN 1 /* we are expecting the call back */
#define CALLBACK_DIALOUT 2 /* we are dialling out to call back */
/*
* 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[MAXPATHLEN]; /* Device name */
extern int crtscts; /* Use hardware flow control */
extern bool modem; /* Use modem control lines */
extern int inspeed; /* Input/Output speed requested */
extern u_int32_t netmask; /* IP netmask to set on interface */
extern bool lockflag; /* Create lock file to lock the serial dev */
extern bool nodetach; /* Don't detach from controlling tty */
extern bool updetach; /* Detach from controlling tty when link up */
extern char *initializer; /* Script to initialize physical link */
extern char *connect_script; /* Script to establish physical link */
extern char *disconnect_script; /* Script to disestablish physical link */
extern char *welcomer; /* Script to welcome client after connection */
extern char *ptycommand; /* Command to run on other side of pty */
extern int maxconnect; /* Maximum connect time (seconds) */
extern char user[MAXNAMELEN];/* Our name for authenticating ourselves */
extern char passwd[MAXSECRETLEN]; /* Password for PAP or CHAP */
extern bool auth_required; /* Peer is required to authenticate */
extern bool persist; /* Reopen link after it goes down */
extern bool uselogin; /* Use /etc/passwd for checking PAP */
extern char our_name[MAXNAMELEN];/* Our name for authentication purposes */
extern char remote_name[MAXNAMELEN]; /* Peer's name for authentication */
extern bool explicit_remote;/* remote_name specified with remotename opt */
extern bool demand; /* Do dial-on-demand */
extern char *ipparam; /* Extra parameter for ip up/down scripts */
extern bool 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 bool holdoff_specified; /* true if user gave a holdoff value */
extern bool notty; /* Stdin/out is not a tty */
extern char *record_file; /* File to record chars sent/received */
extern bool sync_serial; /* Device is synchronous serial device */
extern int maxfail; /* Max # of unsuccessful connection attempts */
extern char linkname[MAXPATHLEN]; /* logical name for link */
extern bool tune_kernel; /* May alter kernel settings as necessary */
extern int connect_delay; /* Time to delay after connect script */
#ifdef PPP_FILTER
extern struct bpf_program pass_filter; /* Filter for pkts to pass */
extern struct bpf_program active_filter; /* Filter for link-active pkts */
#endif
#ifdef MSLANMAN
extern bool ms_lanman; /* Use LanMan password instead of NT */
/* Has meaning only with MS-CHAP challenges */
#endif
extern char *current_option; /* the name of the option being parsed */
extern int privileged_option; /* set iff the current option came from root */
extern char *option_source; /* string saying where the option came from */
/*
* Values for phase.
*/
#define PHASE_DEAD 0
#define PHASE_INITIALIZE 1
#define PHASE_SERIALCONN 2
#define PHASE_DORMANT 3
#define PHASE_ESTABLISH 4
#define PHASE_AUTHENTICATE 5
#define PHASE_CALLBACK 6
#define PHASE_NETWORK 7
#define PHASE_RUNNING 8
#define PHASE_TERMINATE 9
#define PHASE_DISCONNECT 10
#define PHASE_HOLDOFF 11
/*
* The following struct gives the addresses of procedures to call
* for a particular protocol.
*/
struct protent {
u_short protocol; /* PPP protocol number */
/* Initialization procedure */
void (*init) __P((int unit));
/* Process a received packet */
void (*input) __P((int unit, u_char *pkt, int len));
/* Process a received protocol-reject */
void (*protrej) __P((int unit));
/* Lower layer has come up */
void (*lowerup) __P((int unit));
/* Lower layer has gone down */
void (*lowerdown) __P((int unit));
/* Open the protocol */
void (*open) __P((int unit));
/* Close the protocol */
void (*close) __P((int unit, char *reason));
/* Print a packet in readable form */
int (*printpkt) __P((u_char *pkt, int len,
void (*printer) __P((void *, char *, ...)),
void *arg));
/* Process a received data packet */
void (*datainput) __P((int unit, u_char *pkt, int len));
bool enabled_flag; /* 0 iff protocol is disabled */
char *name; /* Text name of protocol */
char *data_name; /* Text name of corresponding data protocol */
option_t *options; /* List of command-line options */
/* Check requested options, assign defaults */
void (*check_options) __P((void));
/* Configure interface for demand-dial */
int (*demand_conf) __P((int unit));
/* Say whether to bring up link for this pkt */
int (*active_pkt) __P((u_char *pkt, int len));
};
/* Table of pointers to supported protocols */
extern struct protent *protocols[];
/*
* Prototypes.
*/
/* Procedures exported from main.c. */
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 t));
/* Call func(arg) after t seconds */
void untimeout __P((void (*func)(void *), void *arg));
/* Cancel call to func(arg) */
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 *)); /* set script env var */
void script_unsetenv __P((char *)); /* unset script env var */
void new_phase __P((int)); /* signal start of new phase */
/* 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) */
/* 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 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 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 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 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 get_ppp_stats __P((int, struct pppd_stats *));
/* Return link statistics */
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
/* 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 */
/*
* This structure is used to store information about certain
* options, such as where the option value came from (/etc/ppp/options,
* command line, etc.) and whether it came from a privileged source.
*/
struct option_info {
int priv; /* was value set by sysadmin? */
char *source; /* where option came from */
};
extern struct option_info devnam_info;
extern struct option_info initializer_info;
extern struct option_info connect_script_info;
extern struct option_info disconnect_script_info;
extern struct option_info welcomer_info;
extern struct option_info ptycommand_info;
/*
* 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));
/*
* 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))
#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__ */
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