/*
* pppd-private.h - PPP daemon private declarations.
*
* Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The name "Carnegie Mellon University" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For permission or any legal
* details, please contact
* Office of Technology Transfer
* Carnegie Mellon University
* 5000 Forbes Avenue
* Pittsburgh, PA 15213-3890
* (412) 268-4387, fax: (412) 268-7395
*
[email protected]
*
* 4. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by Computing Services
* at Carnegie Mellon University (
http://www.cmu.edu/computing/)."
*
* CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef PPP_PPPD_PRIVATE_H
#define PPP_PPPD_PRIVATE_H
#include <stdio.h> /* for FILE */
#include <stdlib.h> /* for encrypt */
#include <unistd.h> /* for setkey */
#if defined(__linux__)
#include <linux/ppp_defs.h>
#else
#include <net/ppp_defs.h>
#endif
#include "pppd.h"
#ifdef PPP_WITH_IPV6CP
#include "eui64.h"
#endif
/*
* If PPP_DRV_NAME is not defined, use the default "ppp" as the device name.
* Where should PPP_DRV_NAME come from? Do we include it here?
*/
#if !defined(PPP_DRV_NAME)
#if defined(SOL2)
#define PPP_DRV_NAME "sppp"
#else
#define PPP_DRV_NAME "ppp"
#endif /* defined(SOL2) */
#endif /* !defined(PPP_DRV_NAME) */
#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 */
};
struct notifier {
struct notifier *next;
ppp_notify_fn *func;
void *arg;
};
/*
* Global variables.
*/
extern int hungup; /* Physical layer has disconnected */
extern int ifunit; /* Interface unit number */
extern char ifname[]; /* Interface name (IFNAMSIZ) */
extern char hostname[]; /* Our hostname */
extern unsigned char outpacket_buf[]; /* Buffer for outgoing packets */
extern int devfd; /* fd of underlying device */
extern int fd_ppp; /* fd for talking PPP */
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 auth_done[NUM_PPP]; /* Methods actually used for auth */
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[]; /* groups the user is in */
extern int ngroups; /* How many groups valid in groups */
extern int link_stats_valid; /* set if link_stats is valid */
extern int link_stats_print; /* set if link_stats is to be printed on link termination */
extern int log_to_fd; /* logging to this fd as well as syslog */
extern bool log_default; /* log_to_fd is default (stdout) */
extern char *no_ppp_msg; /* message to print if ppp not in kernel */
extern bool 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 */
extern int error_count; /* # of times error() has been called */
extern char ppp_devname[]; /* name of PPP tty (maybe ttypx) */
extern int fd_devnull; /* fd open to /dev/null */
extern int listen_time; /* time to listen first (ms) */
extern bool bundle_eof;
extern bool bundle_terminating;
extern struct notifier *pidchange; /* for notifications of pid changing */
extern struct notifier *phasechange; /* for notifications of phase changes */
extern struct notifier *exitnotify; /* for notification that we're exiting */
extern struct notifier *sigreceived; /* notification of received signal */
extern struct notifier *ip_up_notifier; /* IPCP has come up */
extern struct notifier *ip_down_notifier; /* IPCP has gone down */
extern struct notifier *ipv6_up_notifier; /* IPV6CP has come up */
extern struct notifier *ipv6_down_notifier; /* IPV6CP has gone down */
extern struct notifier *auth_up_notifier; /* peer has authenticated */
extern struct notifier *link_down_notifier; /* link has gone down */
extern struct notifier *fork_notifier; /* we are a new child process */
/* 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[]; /* Device name */
extern char remote_number[MAXNAMELEN]; /* Remote telephone number, if avail. */
extern int ppp_session_number; /* Session number (eg PPPoE session) */
extern int crtscts; /* Use hardware flow control */
extern int stop_bits; /* Number of serial port stop bits */
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 */
#ifdef SYSTEMD
extern bool up_sdnotify; /* Notify systemd once link is up (implies nodetach) */
#endif
extern bool updetach; /* Detach from controlling tty when link up */
extern bool master_detach; /* Detach when multilink master without link (options.c) */
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 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 bool session_mgmt; /* Do session management (login records) */
extern char our_name[MAXNAMELEN];/* Our name for authentication purposes */
extern char remote_name[MAXNAMELEN]; /* Peer's name for authentication */
extern char path_upapfile[];/* Pathname of pap-secrets file */
extern char path_chapfile[];/* Pathname of chap-secrets file */
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 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 *pty_socket; /* Socket to connect to pty */
extern char *record_file; /* File to record chars sent/received */
extern int maxfail; /* Max # of unsuccessful connection attempts */
extern char linkname[]; /* logical name for link */
extern bool tune_kernel; /* May alter kernel settings as necessary */
extern int connect_delay; /* Time to delay after connect script */
extern int max_data_rate; /* max bytes/sec through charshunt */
extern int req_unit; /* interface unit number to use */
extern char path_net_init[]; /* pathname of net-init script */
extern char path_net_preup[];/* pathname of net-pre-up script */
extern char path_net_down[]; /* pathname of net-down script */
extern char path_ipup[]; /* pathname of ip-up script */
extern char path_ipdown[]; /* pathname of ip-down script */
extern char path_ippreup[]; /* pathname of ip-pre-up script */
extern char req_ifname[]; /* interface name to use (IFNAMSIZ) */
extern bool multilink; /* enable multilink operation (options.c) */
extern bool noendpoint; /* don't send or accept endpt. discrim. */
extern char *bundle_name; /* bundle name for multilink */
extern bool dump_options; /* print out option values */
extern bool show_options; /* show all option names and descriptions */
extern bool dryrun; /* check everything, print options, exit */
extern int child_wait; /* # seconds to wait for children at end */
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 */
extern int option_priority; /* priority of current options */
#ifdef PPP_WITH_IPV6CP
extern char path_ipv6up[]; /* pathname of ipv6-up script */
extern char path_ipv6down[]; /* pathname of ipv6-down script */
#endif
#if defined(PPP_WITH_EAPTLS) || defined(PPP_WITH_PEAP)
#define TLS_VERIFY_NONE "none"
#define TLS_VERIFY_NAME "name"
#define TLS_VERIFY_SUBJECT "subject"
#define TLS_VERIFY_SUFFIX "suffix"
extern char *crl_dir;
extern char *crl_file;
extern char *ca_path;
extern char *cacert_file;
extern char *max_tls_version;
extern bool tls_verify_key_usage;
extern char *tls_verify_method;
#endif /* PPP_WITH_EAPTLS || PPP_WITH_PEAP */
#ifdef PPP_WITH_EAPTLS
extern char *pkcs12_file;
#endif /* PPP_WITH_EAPTLS */
typedef enum {
PPP_OCTETS_DIRECTION_SUM,
PPP_OCTETS_DIRECTION_IN,
PPP_OCTETS_DIRECTION_OUT,
PPP_OCTETS_DIRECTION_MAXOVERAL,
PPP_OCTETS_DIRECTION_MAXSESSION /* Same as MAXOVERALL, but a little different for RADIUS */
} session_limit_dir_t;
extern unsigned int maxoctets; /* Maximum octetes per session (in bytes) */
extern session_limit_dir_t maxoctets_dir; /* Direction */
extern int maxoctets_timeout; /* Timeout for check of octets limit */
#ifdef PPP_WITH_FILTER
/* Filter for pkts to pass */
extern struct bpf_program pass_filter_in;
extern struct bpf_program pass_filter_out;
/* Filter for link-active pkts */
extern struct bpf_program active_filter_in;
extern struct bpf_program active_filter_out;
#endif
#ifdef PPP_WITH_MSLANMAN
extern bool ms_lanman; /* Use LanMan password instead of NT */
/* Has meaning only with MS-CHAP challenges */
#endif
/* Values for auth_pending, auth_done */
#define PAP_WITHPEER 0x1
#define PAP_PEER 0x2
#define CHAP_WITHPEER 0x4
#define CHAP_PEER 0x8
#define EAP_WITHPEER 0x10
#define EAP_PEER 0x20
/* Values for auth_done only */
#define CHAP_MD5_WITHPEER 0x40
#define CHAP_MD5_PEER 0x80
#define CHAP_MS_SHIFT 8 /* LSB position for MS auths */
#define CHAP_MS_WITHPEER 0x100
#define CHAP_MS_PEER 0x200
#define CHAP_MS2_WITHPEER 0x400
#define CHAP_MS2_PEER 0x800
/*
* This structure contains environment variables that are set or unset
* by the user.
*/
struct userenv {
struct userenv *ue_next;
char *ue_value; /* value (set only) */
bool ue_isset; /* 1 for set, 0 for unset */
bool ue_priv; /* from privileged source */
const char *ue_source; /* source name */
char ue_name[1]; /* variable name */
};
extern struct userenv *userenv_list;
/*
* Prototypes.
*/
/* Procedures exported from main.c. */
void set_ifunit(int); /* set stuff that depends on ifunit */
void detach(void); /* Detach from controlling tty */
void die(int); /* Cleanup and exit */
void quit(void); /* like die(1) */
void record_child(int, char *, void (*) (void *), void *, int);
int device_script(char *cmd, int in, int out, int dont_wait);
/* Run `cmd' with given stdin and stdout */
pid_t run_program(char *prog, char * const * args, int must_exist,
void (*done)(void *), void *arg, int wait);
/* Run program prog with args in child */
void reopen_log(void); /* (re)open the connection to syslog */
void print_link_stats(void); /* Print stats, if available */
void reset_link_stats(int); /* Reset (init) stats when link goes up */
void new_phase(ppp_phase_t); /* signal start of new phase */
bool in_phase(ppp_phase_t);
void notify(struct notifier *, int);
int ppp_send_config(int, int, u_int32_t, int, int);
int ppp_recv_config(int, int, u_int32_t, int, int);
const char *protocol_name(int);
void remove_pidfiles(void);
void lock_db(void);
void unlock_db(void);
/* Procedures exported from tty.c. */
void tty_init(void);
void print_string(char *, int, printer_func, void *);
/* Format a string for output */
ssize_t complete_read(int, void *, size_t);
/* read a complete buffer */
/* Procedures exported from auth.c */
void link_required(int); /* we are starting to use the link */
void start_link(int); /* bring the link up now */
void link_terminated(int); /* we are finished with the link */
void link_down(int); /* the LCP layer has left the Opened state */
void upper_layers_down(int);/* take all NCPs down */
void link_established(int); /* the link is up; authenticate now */
void start_networks(int); /* start all the network control protos */
void continue_networks(int); /* start network [ip, etc] control protos */
void np_up(int, int); /* a network protocol has come up */
void np_down(int, int); /* a network protocol has gone down */
void np_finished(int, int); /* a network protocol no longer needs link */
void auth_peer_fail(int, int);
/* peer failed to authenticate itself */
void auth_peer_success(int, int, int, char *, int);
/* peer successfully authenticated itself */
void auth_withpeer_fail(int, int);
/* we failed to authenticate ourselves */
void auth_withpeer_success(int, int, int);
/* we successfully authenticated ourselves */
void auth_check_options(void);
/* check authentication options supplied */
void auth_reset(int); /* check what secrets we have */
int check_passwd(int, char *, int, char *, int, char **);
/* Check peer-supplied username/password */
int get_secret(int, char *, char *, char *, int *, int);
/* get "secret" for chap */
int get_srp_secret(int unit, char *client, char *server, char *secret,
int am_server);
int auth_ip_addr(int, u_int32_t);
/* check if IP address is authorized */
int auth_number(void); /* check if remote number is authorized */
/* Procedures exported from demand.c */
void demand_conf(void); /* config interface(s) for demand-dial */
void demand_block(void); /* set all NPs to queue up packets */
void demand_unblock(void); /* set all NPs to pass packets */
void demand_discard(void); /* set all NPs to discard packets */
void demand_rexmit(int); /* retransmit saved frames for an NP */
int loop_chars(unsigned char *, int); /* process chars from loopback */
int loop_frame(unsigned char *, int); /* should we bring link up? */
/* Procedures exported from sys-*.c */
void sys_init(void); /* Do system-dependent initialization */
void sys_cleanup(void); /* Restore system state before exiting */
int sys_check_options(void); /* Check options specified */
int get_pty(int *, int *, char *, int); /* Get pty master/slave */
int open_ppp_loopback(void); /* Open loopback for demand-dialling */
int tty_establish_ppp(int); /* Turn serial port into a ppp interface */
void tty_disestablish_ppp(int); /* Restore port to normal operation */
void make_new_bundle(int, int, int, int); /* Create new bundle */
int bundle_attach(int); /* Attach link to existing bundle */
void cfg_bundle(int, int, int, int); /* Configure existing bundle */
void destroy_bundle(void); /* Tell driver to destroy bundle */
void clean_check(void); /* Check if line was 8-bit clean */
void set_up_tty(int, int); /* Set up port's speed, parameters, etc. */
void restore_tty(int); /* Restore port's original parameters */
void setdtr(int, int); /* Raise or lower port's DTR line */
void output(int, unsigned char *, int); /* Output a PPP packet */
void wait_input(struct timeval *);
/* Wait for input, with timeout */
void add_fd(int); /* Add fd to set to wait for */
void remove_fd(int); /* Remove fd from set to wait for */
int read_packet(unsigned char *); /* Read PPP packet */
int get_loop_output(void); /* Read pkts from loopback */
void tty_send_config(int, u_int32_t, int, int);
/* Configure i/f transmit parameters */
void tty_set_xaccm(ext_accm);
/* Set extended transmit ACCM */
void tty_recv_config(int, u_int32_t, int, int);
/* Configure i/f receive parameters */
int ccp_test(int, unsigned char *, int, int);
/* Test support for compression scheme */
void ccp_flags_set(int, int, int);
/* Set kernel CCP state */
int ccp_fatal_error(int); /* Test for fatal decomp error in kernel */
int get_idle_time(int, struct ppp_idle *);
/* Find out how long link has been idle */
int get_ppp_stats(int, struct pppd_stats *);
/* Return link statistics */
int sifvjcomp(int, int, int, int);
/* Configure VJ TCP header compression */
int sifup(int); /* Configure i/f up for one protocol */
int sifnpmode(int u, int proto, enum NPmode mode);
/* Set mode for handling packets for proto */
int sifdown(int); /* Configure i/f down for one protocol */
int sifaddr(int, u_int32_t, u_int32_t, u_int32_t);
/* Configure IPv4 addresses for i/f */
int cifaddr(int, u_int32_t, u_int32_t);
/* Reset i/f IP addresses */
#ifdef PPP_WITH_IPV6CP
int sif6up(int); /* Configure i/f up for IPv6 */
int sif6down(int); /* Configure i/f down for IPv6 */
int sif6addr(int, eui64_t, eui64_t);
/* Configure IPv6 addresses for i/f */
int cif6addr(int, eui64_t, eui64_t);
/* Remove an IPv6 address from i/f */
#endif
int sifdefaultroute(int, u_int32_t, u_int32_t, bool replace_default_rt);
/* Create default route through i/f */
int cifdefaultroute(int, u_int32_t, u_int32_t);
/* Delete default route through i/f */
#ifdef PPP_WITH_IPV6CP
int sif6defaultroute(int, eui64_t, eui64_t);
/* Create default IPv6 route through i/f */
int cif6defaultroute(int, eui64_t, eui64_t);
/* Delete default IPv6 route through i/f */
#endif
int sifproxyarp(int, u_int32_t);
/* Add proxy ARP entry for peer */
int cifproxyarp(int, u_int32_t);
/* Delete proxy ARP entry for peer */
u_int32_t GetMask(u_int32_t); /* Get appropriate netmask for address */
int mkdir_recursive(const char *); /* Recursively create directory */
int lock(char *); /* Create lock file for device */
int relock(int); /* Rewrite lock file with new pid */
void unlock(void); /* Delete previously-created lock file */
void logwtmp(const char *, const char *, const char *);
/* Write entry to wtmp file */
int get_host_seed(void); /* Get host-dependent random number seed */
int have_route_to(u_int32_t); /* Check if route to addr exists */
#ifdef PPP_WITH_FILTER
int set_filters(struct bpf_program *pass_in, struct bpf_program *pass_out,
struct bpf_program *active_in, struct bpf_program *active_out);
/* Set filter programs in kernel */
#endif
int get_if_hwaddr(unsigned char *addr, char *name);
int get_first_ether_hwaddr(unsigned char *addr);
/* Procedures exported from options.c */
int setipaddr(char *, char **, int); /* Set local/remote ip addresses */
int parse_args(int argc, char **argv);
/* Parse options from arguments given */
int getword(FILE *f, char *word, int *newlinep, char *filename);
/* Read a word from a file */
int options_from_user(void); /* Parse options from user's .ppprc */
int options_for_tty(void); /* Parse options from /etc/ppp/options.tty */
struct wordlist;
int options_from_list(struct wordlist *, int privileged);
/* Parse options from a wordlist */
void check_options(void); /* check values after all options parsed */
int override_value(char *, int, const char *);
/* override value if permitted by priority */
void print_options(printer_func, void *);
/* print out values of all options */
void showopts(void);
/* show all option names and description */
int parse_dotted_ip(char *, u_int32_t *);
/*
* Inline versions of get/put char/short/long.
* Pointer is advanced; we assume that both arguments
* are lvalues and will already be in registers.
* cp MUST be unsigned char *.
*/
#define GETCHAR(c, cp) { \
(c) = *(cp)++; \
}
#define PUTCHAR(c, cp) { \
*(cp)++ = (unsigned char) (c); \
}
#define GETSHORT(s, cp) { \
(s) = *(cp)++ << 8; \
(s) |= *(cp)++; \
}
#define PUTSHORT(s, cp) { \
*(cp)++ = (unsigned char) ((s) >> 8); \
*(cp)++ = (unsigned char) (s); \
}
#define GETLONG(l, cp) { \
(l) = *(cp)++ << 8; \
(l) |= *(cp)++; (l) <<= 8; \
(l) |= *(cp)++; (l) <<= 8; \
(l) |= *(cp)++; \
}
#define PUTLONG(l, cp) { \
*(cp)++ = (unsigned char) ((l) >> 24); \
*(cp)++ = (unsigned char) ((l) >> 16); \
*(cp)++ = (unsigned char) ((l) >> 8); \
*(cp)++ = (unsigned 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) ppp_timeout((r), (f), (t), 0)
#define UNTIMEOUT(r, f) ppp_untimeout((r), (f))
#define BCOPY(s, d, l) memcpy(d, s, l)
#define BZERO(s, n) memset(s, 0, n)
#define BCMP(s1, s2, l) memcmp(s1, s2, l)
#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); }
/*
* 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
#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
#ifndef offsetof
#define offsetof(type, member) ((size_t) &((type *)0)->member)
#endif
#endif
