remove temp file

1 files changed, 0 insertions, 2750 deletions

diff --git a/mdk-stage1/ppp/pppd/sys-linux.c.wtmp b/mdk-stage1/ppp/pppd/sys-linux.c.wtmp
deleted file mode 100644
index f1b48423e..000000000
--- a/mdk-stage1/ppp/pppd/sys-linux.c.wtmp
+++ /dev/null
@@ -1,2750 +0,0 @@
-/*
- * sys-linux.c - System-dependent procedures for setting up
- * PPP interfaces on Linux systems
- *
- * 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.
- */
-
-#include <sys/ioctl.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/time.h>
-#include <sys/errno.h>
-#include <sys/file.h>
-#include <sys/stat.h>
-#include <sys/utsname.h>
-#include <sys/sysmacros.h>
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <syslog.h>
-#include <string.h>
-#include <time.h>
-#include <memory.h>
-#include <utmp.h>
-#include <mntent.h>
-#include <signal.h>
-#include <fcntl.h>
-#include <ctype.h>
-#include <termios.h>
-#include <unistd.h>
-
-/* This is in netdevice.h. However, this compile will fail miserably if
-   you attempt to include netdevice.h because it has so many references
-   to __memcpy functions which it should not attempt to do. So, since I
-   really don't use it, but it must be defined, define it now. */
-
-#ifndef MAX_ADDR_LEN
-#define MAX_ADDR_LEN 7
-#endif
-
-#if __GLIBC__ >= 2
-#include <asm/types.h>		/* glibc 2 conflicts with linux/types.h */
-#include <net/if.h>
-#include <net/if_arp.h>
-#include <net/route.h>
-#include <netinet/if_ether.h>
-#else
-#include <linux/types.h>
-#include <linux/if.h>
-#include <linux/if_arp.h>
-#include <linux/route.h>
-#include <linux/if_ether.h>
-#endif
-#include <netinet/in.h>
-#include <arpa/inet.h>
-
-#include <linux/ppp_defs.h>
-#include <linux/if_ppp.h>
-
-#include "pppd.h"
-#include "fsm.h"
-#include "ipcp.h"
-
-#ifdef IPX_CHANGE
-#include "ipxcp.h"
-#if __GLIBC__ >= 2 && \
-    !(defined(__powerpc__) && __GLIBC__ == 2 && __GLIBC_MINOR__ == 0)
-#include <netipx/ipx.h>
-#else
-#include <linux/ipx.h>
-#endif
-#endif /* IPX_CHANGE */
-
-#ifdef PPP_FILTER
-#include <net/bpf.h>
-#include <linux/filter.h>
-#endif /* PPP_FILTER */
-
-#ifdef LOCKLIB
-#include <sys/locks.h>
-#endif
-
-#ifdef INET6
-#ifndef _LINUX_IN6_H
-/*
- *    This is in linux/include/net/ipv6.h.
- */
-
-struct in6_ifreq {
-    struct in6_addr ifr6_addr;
-    __u32 ifr6_prefixlen;
-    unsigned int ifr6_ifindex;
-};
-#endif
-
-#define IN6_LLADDR_FROM_EUI64(sin6, eui64) do {			\
-	memset(&sin6.s6_addr, 0, sizeof(struct in6_addr));	\
-	sin6.s6_addr16[0] = htons(0xfe80); 			\
-	eui64_copy(eui64, sin6.s6_addr32[2]);			\
-	} while (0)
-
-#endif /* INET6 */
-
-/* We can get an EIO error on an ioctl if the modem has hung up */
-#define ok_error(num) ((num)==EIO)
-
-static int tty_disc = N_TTY;	/* The TTY discipline */
-static int ppp_disc = N_PPP;	/* The PPP discpline */
-static int initfdflags = -1;	/* Initial file descriptor flags for fd */
-static int ppp_fd = -1;		/* fd which is set to PPP discipline */
-static int sock_fd = -1;	/* socket for doing interface ioctls */
-static int slave_fd = -1;
-static int master_fd = -1;
-#ifdef INET6
-static int sock6_fd = -1;
-#endif /* INET6 */
-static int ppp_dev_fd = -1;	/* fd for /dev/ppp (new style driver) */
-static int chindex;		/* channel index (new style driver) */
-
-static fd_set in_fds;		/* set of fds that wait_input waits for */
-static int max_in_fd;		/* highest fd set in in_fds */
-
-static int has_proxy_arp       = 0;
-static int driver_version      = 0;
-static int driver_modification = 0;
-static int driver_patch        = 0;
-static int driver_is_old       = 0;
-static int restore_term        = 0;	/* 1 => we've munged the terminal */
-static struct termios inittermios;	/* Initial TTY termios */
-
-static int new_style_driver = 0;
-
-static char loop_name[20];
-static unsigned char inbuf[512]; /* buffer for chars read from loopback */
-
-static int	if_is_up;	/* Interface has been marked up */
-static u_int32_t default_route_gateway;	/* Gateway for default route added */
-static u_int32_t proxy_arp_addr;	/* Addr for proxy arp entry added */
-static char proxy_arp_dev[16];		/* Device for proxy arp entry */
-static u_int32_t our_old_addr;		/* for detecting address changes */
-static int	dynaddr_set;		/* 1 if ip_dynaddr set */
-static int	looped;			/* 1 if using loop */
-static int	link_mtu;		/* mtu for the link (not bundle) */
-
-static struct utsname utsname;	/* for the kernel version */
-static int kernel_version;
-#define KVERSION(j,n,p)	((j)*1000000 + (n)*1000 + (p))
-
-#define MAX_IFS		100
-
-#define FLAGS_GOOD (IFF_UP          | IFF_BROADCAST)
-#define FLAGS_MASK (IFF_UP          | IFF_BROADCAST | \
-		    IFF_POINTOPOINT | IFF_LOOPBACK  | IFF_NOARP)
-
-#define SIN_ADDR(x)	(((struct sockaddr_in *) (&(x)))->sin_addr.s_addr)
-
-/* Prototypes for procedures local to this file. */
-static int get_flags (int fd);
-static void set_flags (int fd, int flags);
-static int translate_speed (int bps);
-static int baud_rate_of (int speed);
-static void close_route_table (void);
-static int open_route_table (void);
-static int read_route_table (struct rtentry *rt);
-static int defaultroute_exists (struct rtentry *rt);
-static int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr,
-			   char *name, int namelen);
-static void decode_version (char *buf, int *version, int *mod, int *patch);
-static int set_kdebugflag(int level);
-static int ppp_registered(void);
-static int make_ppp_unit(void);
-static void restore_loop(void);	/* Transfer ppp unit back to loopback */
-
-extern u_char	inpacket_buf[];	/* borrowed from main.c */
-
-/*
- * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
- * if it exists.
- */
-
-#define SET_SA_FAMILY(addr, family)			\
-    memset ((char *) &(addr), '\0', sizeof(addr));	\
-    addr.sa_family = (family);
-
-/*
- * Determine if the PPP connection should still be present.
- */
-
-extern int hungup;
-
-/* new_fd is the fd of a tty */
-static void set_ppp_fd (int new_fd)
-{
-	SYSDEBUG ((LOG_DEBUG, "setting ppp_fd to %d\n", new_fd));
-	ppp_fd = new_fd;
-	if (!new_style_driver)
-		ppp_dev_fd = new_fd;
-}
-
-static int still_ppp(void)
-{
-	if (new_style_driver)
-		return !hungup && ppp_fd >= 0;
-	if (!hungup || ppp_fd == slave_fd)
-		return 1;
-	if (slave_fd >= 0) {
-		set_ppp_fd(slave_fd);
-		return 1;
-	}
-	return 0;
-}
-
-/********************************************************************
- *
- * Functions to read and set the flags value in the device driver
- */
-
-static int get_flags (int fd)
-{    
-    int flags;
-
-    if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) {
-	if ( ok_error (errno) )
-	    flags = 0;
-	else
-	    fatal("ioctl(PPPIOCGFLAGS): %m");
-    }
-
-    SYSDEBUG ((LOG_DEBUG, "get flags = %x\n", flags));
-    return flags;
-}
-
-/********************************************************************/
-
-static void set_flags (int fd, int flags)
-{    
-    SYSDEBUG ((LOG_DEBUG, "set flags = %x\n", flags));
-
-    if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &flags) < 0) {
-	if (! ok_error (errno) )
-	    fatal("ioctl(PPPIOCSFLAGS, %x): %m", flags, errno);
-    }
-}
-
-/********************************************************************
- *
- * sys_init - System-dependent initialization.
- */
-
-void sys_init(void)
-{
-    int flags;
-
-    if (new_style_driver) {
-	ppp_dev_fd = open("/dev/ppp", O_RDWR);
-	if (ppp_dev_fd < 0)
-	    fatal("Couldn't open /dev/ppp: %m");
-	flags = fcntl(ppp_dev_fd, F_GETFL);
-	if (flags == -1
-	    || fcntl(ppp_dev_fd, F_SETFL, flags | O_NONBLOCK) == -1)
-	    warn("Couldn't set /dev/ppp to nonblock: %m");
-    }
-
-    /* Get an internet socket for doing socket ioctls. */
-    sock_fd = socket(AF_INET, SOCK_DGRAM, 0);
-    if (sock_fd < 0)
-	fatal("Couldn't create IP socket: %m(%d)", errno);
-
-#ifdef INET6
-    sock6_fd = socket(AF_INET6, SOCK_DGRAM, 0);
-    if (sock6_fd < 0)
-	sock6_fd = -errno;	/* save errno for later */
-#endif
-
-    FD_ZERO(&in_fds);
-    max_in_fd = 0;
-}
-
-/********************************************************************
- *
- * sys_cleanup - restore any system state we modified before exiting:
- * mark the interface down, delete default route and/or proxy arp entry.
- * This shouldn't call die() because it's called from die().
- */
-
-void sys_cleanup(void)
-{
-/*
- * Take down the device
- */
-    if (if_is_up) {
-	if_is_up = 0;
-	sifdown(0);
-    }
-/*
- * Delete any routes through the device.
- */
-    if (default_route_gateway != 0)
-	cifdefaultroute(0, 0, default_route_gateway);
-
-    if (has_proxy_arp)
-	cifproxyarp(0, proxy_arp_addr);
-}
-
-/********************************************************************
- *
- * sys_close - Clean up in a child process before execing.
- */
-void
-sys_close(void)
-{
-    if (new_style_driver)
-	close(ppp_dev_fd);
-    if (sock_fd >= 0)
-	close(sock_fd);
-    if (slave_fd >= 0)
-	close(slave_fd);
-    if (master_fd >= 0)
-	close(master_fd);
-    closelog();
-}
-
-/********************************************************************
- *
- * set_kdebugflag - Define the debugging level for the kernel
- */
-
-static int set_kdebugflag (int requested_level)
-{
-    if (new_style_driver && ifunit < 0)
-	return 1;
-    if (ioctl(ppp_dev_fd, PPPIOCSDEBUG, &requested_level) < 0) {
-	if ( ! ok_error (errno) )
-	    error("ioctl(PPPIOCSDEBUG): %m");
-	return (0);
-    }
-    SYSDEBUG ((LOG_INFO, "set kernel debugging level to %d",
-		requested_level));
-    return (1);
-}
-
-/********************************************************************
- *
- * tty_establish_ppp - Turn the serial port into a ppp interface.
- */
-
-int tty_establish_ppp (int tty_fd)
-{
-    int x;
-    int fd = -1;
-
-/*
- * Ensure that the tty device is in exclusive mode.
- */
-    if (ioctl(tty_fd, TIOCEXCL, 0) < 0) {
-	if ( ! ok_error ( errno ))
-	    warn("Couldn't make tty exclusive: %m");
-    }
-/*
- * Demand mode - prime the old ppp device to relinquish the unit.
- */
-    if (!new_style_driver && looped
-	&& ioctl(slave_fd, PPPIOCXFERUNIT, 0) < 0) {
-	error("ioctl(transfer ppp unit): %m");
-	return -1;
-    }
-/*
- * Set the current tty to the PPP discpline
- */
-
-#ifndef N_SYNC_PPP
-#define N_SYNC_PPP 14
-#endif
-    ppp_disc = (new_style_driver && sync_serial)? N_SYNC_PPP: N_PPP;
-    if (ioctl(tty_fd, TIOCSETD, &ppp_disc) < 0) {
-	if ( ! ok_error (errno) ) {
-	    error("Couldn't set tty to PPP discipline: %m");
-	    return -1;
-	}
-    }
-
-    if (new_style_driver) {
-	/* Open another instance of /dev/ppp and connect the channel to it */
-	int flags;
-
-	if (ioctl(tty_fd, PPPIOCGCHAN, &chindex) == -1) {
-	    error("Couldn't get channel number: %m");
-	    goto err;
-	}
-	dbglog("using channel %d", chindex);
-	fd = open("/dev/ppp", O_RDWR);
-	if (fd < 0) {
-	    error("Couldn't reopen /dev/ppp: %m");
-	    goto err;
-	}
-	if (ioctl(fd, PPPIOCATTCHAN, &chindex) < 0) {
-	    error("Couldn't attach to channel %d: %m", chindex);
-	    goto err_close;
-	}
-	flags = fcntl(fd, F_GETFL);
-	if (flags == -1 || fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
-	    warn("Couldn't set /dev/ppp (channel) to nonblock: %m");
-	set_ppp_fd(fd);
-
-	if (!looped)
-	    ifunit = -1;
-	if (!looped && !multilink) {
-	    /*
-	     * Create a new PPP unit.
-	     */
-	    if (make_ppp_unit() < 0)
-		goto err_close;
-	}
-
-	if (looped)
-	    set_flags(ppp_dev_fd, get_flags(ppp_dev_fd) & ~SC_LOOP_TRAFFIC);
-
-	if (!multilink) {
-	    add_fd(ppp_dev_fd);
-	    if (ioctl(fd, PPPIOCCONNECT, &ifunit) < 0) {
-		error("Couldn't attach to PPP unit %d: %m", ifunit);
-		goto err_close;
-	    }
-	}
-
-    } else {
-	/*
-	 * Old-style driver: find out which interface we were given.
-	 */
-	set_ppp_fd (tty_fd);
-	if (ioctl(tty_fd, PPPIOCGUNIT, &x) < 0) {	
-	    if (ok_error (errno))
-		goto err;
-	    fatal("ioctl(PPPIOCGUNIT): %m(%d)", errno);
-	}
-	/* Check that we got the same unit again. */
-	if (looped && x != ifunit)
-	    fatal("transfer_ppp failed: wanted unit %d, got %d", ifunit, x);
-	ifunit = x;
-
-	/*
-	 * Fetch the initial file flags and reset blocking mode on the file.
-	 */
-	initfdflags = fcntl(tty_fd, F_GETFL);
-	if (initfdflags == -1 ||
-	    fcntl(tty_fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
-	    if ( ! ok_error (errno))
-		warn("Couldn't set device to non-blocking mode: %m");
-	}
-    }
-
-    looped = 0;
-
-    /*
-     * Enable debug in the driver if requested.
-     */
-    if (!looped)
-	set_kdebugflag (kdebugflag);
-
-#define SC_RCVB	(SC_RCV_B7_0 | SC_RCV_B7_1 | SC_RCV_EVNP | SC_RCV_ODDP)
-#define SC_LOGB	(SC_DEBUG | SC_LOG_INPKT | SC_LOG_OUTPKT | SC_LOG_RAWIN \
-		 | SC_LOG_FLUSH)
-
-    set_flags(ppp_fd, ((get_flags(ppp_fd) & ~(SC_RCVB | SC_LOGB))
-		       | ((kdebugflag * SC_DEBUG) & SC_LOGB)));
-
-    SYSDEBUG ((LOG_NOTICE, "Using version %d.%d.%d of PPP driver",
-	    driver_version, driver_modification, driver_patch));
-
-    return ppp_fd;
-
- err_close:
-    close(fd);
- err:
-    if (ioctl(tty_fd, TIOCSETD, &tty_disc) < 0 && !ok_error(errno))
-	warn("Couldn't reset tty to normal line discipline: %m");
-    return -1;
-}
-
-/********************************************************************
- *
- * tty_disestablish_ppp - Restore the serial port to normal operation,
- * and reconnect the ppp unit to the loopback if in demand mode.
- * This shouldn't call die() because it's called from die().
- */
-
-void tty_disestablish_ppp(int tty_fd)
-{
-    if (demand)
-	restore_loop();
-    if (!hungup) {
-/*
- * Flush the tty output buffer so that the TIOCSETD doesn't hang.
- */
-	if (tcflush(tty_fd, TCIOFLUSH) < 0)
-	    warn("tcflush failed: %m");
-/*
- * Restore the previous line discipline
- */
-	if (ioctl(tty_fd, TIOCSETD, &tty_disc) < 0) {
-	    if ( ! ok_error (errno))
-		error("ioctl(TIOCSETD, N_TTY): %m");
-	}
-	
-	if (ioctl(tty_fd, TIOCNXCL, 0) < 0) {
-	    if ( ! ok_error (errno))
-		warn("ioctl(TIOCNXCL): %m(%d)", errno);
-	}
-
-	/* Reset non-blocking mode on fd. */
-	if (initfdflags != -1 && fcntl(tty_fd, F_SETFL, initfdflags) < 0) {
-	    if ( ! ok_error (errno))
-		warn("Couldn't restore device fd flags: %m");
-	}
-    }
-    initfdflags = -1;
-
-    if (new_style_driver) {
-	close(ppp_fd);
-	ppp_fd = -1;
-	if (!looped && ifunit >= 0 && ioctl(ppp_dev_fd, PPPIOCDETACH) < 0)
-	    error("Couldn't release PPP unit: %m");
-	if (!multilink)
-	    remove_fd(ppp_dev_fd);
-    }
-}
-
-/*
- * make_ppp_unit - make a new ppp unit for ppp_dev_fd.
- * Assumes new_style_driver.
- */
-static int make_ppp_unit()
-{
-	int x;
-
-	ifunit = req_unit;
-	x = ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit);
-	if (x < 0 && req_unit >= 0 && errno == EEXIST) {
-		warn("Couldn't allocate PPP unit %d as it is already in use");
-		ifunit = -1;
-		x = ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit);
-	}
-	if (x < 0)
-		error("Couldn't create new ppp unit: %m");
-	return x;
-}
-
-/*
- * cfg_bundle - configure the existing bundle.
- * Used in demand mode.
- */
-void cfg_bundle(int mrru, int mtru, int rssn, int tssn)
-{
-	int flags;
-
-	if (!new_style_driver)
-		return;
-
-	/* set the mrru, mtu and flags */
-	if (ioctl(ppp_dev_fd, PPPIOCSMRRU, &mrru) < 0)
-		error("Couldn't set MRRU: %m");
-	flags = get_flags(ppp_dev_fd);
-	flags &= ~(SC_MP_SHORTSEQ | SC_MP_XSHORTSEQ);
-	flags |= (rssn? SC_MP_SHORTSEQ: 0) | (tssn? SC_MP_XSHORTSEQ: 0)
-		| (mrru? SC_MULTILINK: 0);
-
-	set_flags(ppp_dev_fd, flags);
-
-	/* connect up the channel */
-	if (ioctl(ppp_fd, PPPIOCCONNECT, &ifunit) < 0)
-		fatal("Couldn't attach to PPP unit %d: %m", ifunit);
-	add_fd(ppp_dev_fd);
-}
-
-/*
- * make_new_bundle - create a new PPP unit (i.e. a bundle)
- * and connect our channel to it.  This should only get called
- * if `multilink' was set at the time establish_ppp was called.
- * In demand mode this uses our existing bundle instead of making
- * a new one.
- */
-void make_new_bundle(int mrru, int mtru, int rssn, int tssn)
-{
-	if (!new_style_driver)
-		return;
-
-	/* make us a ppp unit */
-	if (make_ppp_unit() < 0)
-		die(1);
-
-	/* set the mrru and flags */
-	cfg_bundle(mrru, mtru, rssn, tssn);
-}
-
-/*
- * bundle_attach - attach our link to a given PPP unit.
- * We assume the unit is controlled by another pppd.
- */
-int bundle_attach(int ifnum)
-{
-	if (!new_style_driver)
-		return -1;
-
-	if (ioctl(ppp_dev_fd, PPPIOCATTACH, &ifnum) < 0) {
-		if (errno == ENXIO)
-			return 0;	/* doesn't still exist */
-		fatal("Couldn't attach to interface unit %d: %m\n", ifnum);
-	}
-	if (ioctl(ppp_fd, PPPIOCCONNECT, &ifnum) < 0)
-		fatal("Couldn't connect to interface unit %d: %m", ifnum);
-	set_flags(ppp_dev_fd, get_flags(ppp_dev_fd) | SC_MULTILINK);
-
-	ifunit = ifnum;
-	return 1;
-}
-
-/********************************************************************
- *
- * clean_check - Fetch the flags for the device and generate
- * appropriate error messages.
- */
-void clean_check(void)
-{
-    int x;
-    char *s;
-
-    if (still_ppp()) {
-	if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
-	    s = NULL;
-	    switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
-	    case SC_RCV_B7_0:
-		s = "all had bit 7 set to 1";
-		break;
-		
-	    case SC_RCV_B7_1:
-		s = "all had bit 7 set to 0";
-		break;
-		
-	    case SC_RCV_EVNP:
-		s = "all had odd parity";
-		break;
-		
-	    case SC_RCV_ODDP:
-		s = "all had even parity";
-		break;
-	    }
-	    
-	    if (s != NULL) {
-		warn("Receive serial link is not 8-bit clean:");
-		warn("Problem: %s", s);
-	    }
-	}
-    }
-}
-	
-
-/*
- * List of valid speeds.
- */
-
-struct speed {
-    int speed_int, speed_val;
-} speeds[] = {
-#ifdef B50
-    { 50, B50 },
-#endif
-#ifdef B75
-    { 75, B75 },
-#endif
-#ifdef B110
-    { 110, B110 },
-#endif
-#ifdef B134
-    { 134, B134 },
-#endif
-#ifdef B150
-    { 150, B150 },
-#endif
-#ifdef B200
-    { 200, B200 },
-#endif
-#ifdef B300
-    { 300, B300 },
-#endif
-#ifdef B600
-    { 600, B600 },
-#endif
-#ifdef B1200
-    { 1200, B1200 },
-#endif
-#ifdef B1800
-    { 1800, B1800 },
-#endif
-#ifdef B2000
-    { 2000, B2000 },
-#endif
-#ifdef B2400
-    { 2400, B2400 },
-#endif
-#ifdef B3600
-    { 3600, B3600 },
-#endif
-#ifdef B4800
-    { 4800, B4800 },
-#endif
-#ifdef B7200
-    { 7200, B7200 },
-#endif
-#ifdef B9600
-    { 9600, B9600 },
-#endif
-#ifdef B19200
-    { 19200, B19200 },
-#endif
-#ifdef B38400
-    { 38400, B38400 },
-#endif
-#ifdef B57600
-    { 57600, B57600 },
-#endif
-#ifdef B76800
-    { 76800, B76800 },
-#endif
-#ifdef B115200
-    { 115200, B115200 },
-#endif
-#ifdef EXTA
-    { 19200, EXTA },
-#endif
-#ifdef EXTB
-    { 38400, EXTB },
-#endif
-#ifdef B230400
-    { 230400, B230400 },
-#endif
-#ifdef B460800
-    { 460800, B460800 },
-#endif
-#ifdef B921600
-    { 921600, B921600 },
-#endif
-    { 0, 0 }
-};
-
-/********************************************************************
- *
- * Translate from bits/second to a speed_t.
- */
-
-static int translate_speed (int bps)
-{
-    struct speed *speedp;
-
-    if (bps != 0) {
-	for (speedp = speeds; speedp->speed_int; speedp++) {
-	    if (bps == speedp->speed_int)
-		return speedp->speed_val;
-	}
-	warn("speed %d not supported", bps);
-    }
-    return 0;
-}
-
-/********************************************************************
- *
- * Translate from a speed_t to bits/second.
- */
-
-static int baud_rate_of (int speed)
-{
-    struct speed *speedp;
-    
-    if (speed != 0) {
-	for (speedp = speeds; speedp->speed_int; speedp++) {
-	    if (speed == speedp->speed_val)
-		return speedp->speed_int;
-	}
-    }
-    return 0;
-}
-
-/********************************************************************
- *
- * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
- * at the requested speed, etc.  If `local' is true, set CLOCAL
- * regardless of whether the modem option was specified.
- */
-
-void set_up_tty(int tty_fd, int local)
-{
-    int speed;
-    struct termios tios;
-
-    setdtr(tty_fd, 1);
-    if (tcgetattr(tty_fd, &tios) < 0) {
-	if (!ok_error(errno))
-	    fatal("tcgetattr: %m(%d)", errno);
-	return;
-    }
-    
-    if (!restore_term)
-	inittermios = tios;
-    
-    tios.c_cflag     &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
-    tios.c_cflag     |= CS8 | CREAD | HUPCL;
-
-    tios.c_iflag      = IGNBRK | IGNPAR;
-    tios.c_oflag      = 0;
-    tios.c_lflag      = 0;
-    tios.c_cc[VMIN]   = 1;
-    tios.c_cc[VTIME]  = 0;
-    
-    if (local || !modem)
-	tios.c_cflag ^= (CLOCAL | HUPCL);
-
-    switch (crtscts) {
-    case 1:
-	tios.c_cflag |= CRTSCTS;
-	break;
-
-    case -2:
-	tios.c_iflag     |= IXON | IXOFF;
-	tios.c_cc[VSTOP]  = 0x13;	/* DC3 = XOFF = ^S */
-	tios.c_cc[VSTART] = 0x11;	/* DC1 = XON  = ^Q */
-	break;
-
-    case -1:
-	tios.c_cflag &= ~CRTSCTS;
-	break;
-
-    default:
-	break;
-    }
-    
-    speed = translate_speed(inspeed);
-    if (speed) {
-	cfsetospeed (&tios, speed);
-	cfsetispeed (&tios, speed);
-    }
-/*
- * We can't proceed if the serial port speed is B0,
- * since that implies that the serial port is disabled.
- */
-    else {
-	speed = cfgetospeed(&tios);
-	if (speed == B0)
-	    fatal("Baud rate for %s is 0; need explicit baud rate", devnam);
-    }
-
-    if (tcsetattr(tty_fd, TCSAFLUSH, &tios) < 0)
-	if (!ok_error(errno))
-	    fatal("tcsetattr: %m");
-    
-    baud_rate    = baud_rate_of(speed);
-    restore_term = 1;
-}
-
-/********************************************************************
- *
- * setdtr - control the DTR line on the serial port.
- * This is called from die(), so it shouldn't call die().
- */
-
-void setdtr (int tty_fd, int on)
-{
-    int modembits = TIOCM_DTR;
-
-    ioctl(tty_fd, (on ? TIOCMBIS : TIOCMBIC), &modembits);
-}
-
-/********************************************************************
- *
- * restore_tty - restore the terminal to the saved settings.
- */
-
-void restore_tty (int tty_fd)
-{
-    if (restore_term) {
-	restore_term = 0;
-/*
- * Turn off echoing, because otherwise we can get into
- * a loop with the tty and the modem echoing to each other.
- * We presume we are the sole user of this tty device, so
- * when we close it, it will revert to its defaults anyway.
- */
-	if (!default_device)
-	    inittermios.c_lflag &= ~(ECHO | ECHONL);
-	
-	if (tcsetattr(tty_fd, TCSAFLUSH, &inittermios) < 0) {
-	    if (! ok_error (errno))
-		warn("tcsetattr: %m");
-	}
-    }
-}
-
-/********************************************************************
- *
- * output - Output PPP packet.
- */
-
-void output (int unit, unsigned char *p, int len)
-{
-    int fd = ppp_fd;
-    int proto;
-
-    if (debug)
-	dbglog("sent %P", p, len);
-
-    if (len < PPP_HDRLEN)
-	return;
-    if (new_style_driver) {
-	p += 2;
-	len -= 2;
-	proto = (p[0] << 8) + p[1];
-	if (ifunit >= 0 && !(proto >= 0xc000 || proto == PPP_CCPFRAG))
-	    fd = ppp_dev_fd;
-    }
-    if (write(fd, p, len) < 0) {
-	if (errno == EWOULDBLOCK || errno == ENOBUFS
-	    || errno == ENXIO || errno == EIO || errno == EINTR)
-	    warn("write: warning: %m (%d)", errno);
-	else
-	    error("write: %m (%d)", errno);
-    }
-}
-
-/********************************************************************
- *
- * wait_input - wait until there is data available,
- * for the length of time specified by *timo (indefinite
- * if timo is NULL).
- */
-
-void wait_input(struct timeval *timo)
-{
-    fd_set ready, exc;
-    int n;
-
-    ready = in_fds;
-    exc = in_fds;
-    n = select(max_in_fd + 1, &ready, NULL, &exc, timo);
-    if (n < 0 && errno != EINTR)
-	fatal("select: %m(%d)", errno);
-}
-
-/*
- * add_fd - add an fd to the set that wait_input waits for.
- */
-void add_fd(int fd)
-{
-    FD_SET(fd, &in_fds);
-    if (fd > max_in_fd)
-	max_in_fd = fd;
-}
-
-/*
- * remove_fd - remove an fd from the set that wait_input waits for.
- */
-void remove_fd(int fd)
-{
-    FD_CLR(fd, &in_fds);
-}
-
-
-/********************************************************************
- *
- * read_packet - get a PPP packet from the serial device.
- */
-
-int read_packet (unsigned char *buf)
-{
-    int len, nr;
-
-    len = PPP_MRU + PPP_HDRLEN;
-    if (new_style_driver) {
-	*buf++ = PPP_ALLSTATIONS;
-	*buf++ = PPP_UI;
-	len -= 2;
-    }
-    nr = -1;
-    if (ppp_fd >= 0) {
-	nr = read(ppp_fd, buf, len);
-	if (nr < 0 && errno != EWOULDBLOCK && errno != EIO && errno != EINTR)
-	    error("read: %m");
-	if (nr < 0 && errno == ENXIO)
-	    return 0;
-    }
-    if (nr < 0 && new_style_driver && ifunit >= 0) {
-	/* N.B. we read ppp_fd first since LCP packets come in there. */
-	nr = read(ppp_dev_fd, buf, len);
-	if (nr < 0 && errno != EWOULDBLOCK && errno != EIO && errno != EINTR)
-	    error("read /dev/ppp: %m");
-	if (nr < 0 && errno == ENXIO)
-	    return 0;
-    }
-    return (new_style_driver && nr > 0)? nr+2: nr;
-}
-
-/********************************************************************
- *
- * get_loop_output - get outgoing packets from the ppp device,
- * and detect when we want to bring the real link up.
- * Return value is 1 if we need to bring up the link, 0 otherwise.
- */
-int
-get_loop_output(void)
-{
-    int rv = 0;
-    int n;
-
-    if (new_style_driver) {
-	while ((n = read_packet(inpacket_buf)) > 0)
-	    if (loop_frame(inpacket_buf, n))
-		rv = 1;
-	return rv;
-    }
-
-    while ((n = read(master_fd, inbuf, sizeof(inbuf))) > 0)
-	if (loop_chars(inbuf, n))
-	    rv = 1;
-
-    if (n == 0)
-	fatal("eof on loopback");
-
-    if (errno != EWOULDBLOCK)
-	fatal("read from loopback: %m(%d)", errno);
-
-    return rv;
-}
-
-/*
- * netif_set_mtu - set the MTU on the PPP network interface.
- */
-void
-netif_set_mtu(int unit, int mtu)
-{
-    struct ifreq ifr;
-
-    SYSDEBUG ((LOG_DEBUG, "netif_set_mtu: mtu = %d\n", mtu));
-
-    memset (&ifr, '\0', sizeof (ifr));
-    strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
-    ifr.ifr_mtu = mtu;
-	
-    if (ifunit >= 0 && ioctl(sock_fd, SIOCSIFMTU, (caddr_t) &ifr) < 0)
-	fatal("ioctl(SIOCSIFMTU): %m");
-}
-
-/********************************************************************
- *
- * tty_send_config - configure the transmit characteristics of
- * the ppp interface.
- */
-
-void tty_send_config (int mtu,u_int32_t asyncmap,int pcomp,int accomp)
-{
-    u_int x;
-
-/*
- * Set the asyncmap and other parameters for the ppp device
- */
-    if (!still_ppp())
-	return;
-    link_mtu = mtu;
-    SYSDEBUG ((LOG_DEBUG, "send_config: asyncmap = %lx\n", asyncmap));
-    if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) {
-	if (!ok_error(errno))
-	    fatal("ioctl(PPPIOCSASYNCMAP): %m(%d)", errno);
-	return;
-    }
-    
-    x = get_flags(ppp_fd);
-    x = pcomp  ? x | SC_COMP_PROT : x & ~SC_COMP_PROT;
-    x = accomp ? x | SC_COMP_AC   : x & ~SC_COMP_AC;
-    x = sync_serial ? x | SC_SYNC : x & ~SC_SYNC;
-    set_flags(ppp_fd, x);
-}
-
-/********************************************************************
- *
- * tty_set_xaccm - set the extended transmit ACCM for the interface.
- */
-
-void tty_set_xaccm (ext_accm accm)
-{
-    SYSDEBUG ((LOG_DEBUG, "set_xaccm: %08lx %08lx %08lx %08lx\n",
-		accm[0], accm[1], accm[2], accm[3]));
-
-    if (!still_ppp())
-	return;
-    if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY) {
-	if ( ! ok_error (errno))
-	    warn("ioctl(set extended ACCM): %m(%d)", errno);
-    }
-}
-
-/********************************************************************
- *
- * tty_recv_config - configure the receive-side characteristics of
- * the ppp interface.
- */
-
-void tty_recv_config (int mru,u_int32_t asyncmap,int pcomp,int accomp)
-{
-    SYSDEBUG ((LOG_DEBUG, "recv_config: mru = %d\n", mru));
-/*
- * If we were called because the link has gone down then there is nothing
- * which may be done. Just return without incident.
- */
-    if (!still_ppp())
-	return;
-/*
- * Set the receiver parameters
- */
-    if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) {
-	if ( ! ok_error (errno))
-	    error("ioctl(PPPIOCSMRU): %m(%d)", errno);
-    }
-    if (new_style_driver && ifunit >= 0
-	&& ioctl(ppp_dev_fd, PPPIOCSMRU, (caddr_t) &mru) < 0)
-	error("Couldn't set MRU in generic PPP layer: %m");
-
-    SYSDEBUG ((LOG_DEBUG, "recv_config: asyncmap = %lx\n", asyncmap));
-    if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) {
-	if (!ok_error(errno))
-	    error("ioctl(PPPIOCSRASYNCMAP): %m(%d)", errno);
-    }
-}
-
-/********************************************************************
- *
- * ccp_test - ask kernel whether a given compression method
- * is acceptable for use.
- */
-
-int ccp_test (int unit, u_char *opt_ptr, int opt_len, int for_transmit)
-{
-    struct ppp_option_data data;
-
-    memset (&data, '\0', sizeof (data));
-    data.ptr      = opt_ptr;
-    data.length   = opt_len;
-    data.transmit = for_transmit;
-
-    if (ioctl(ppp_dev_fd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
-	return 1;
-
-    return (errno == ENOBUFS)? 0: -1;
-}
-
-/********************************************************************
- *
- * ccp_flags_set - inform kernel about the current state of CCP.
- */
-
-void ccp_flags_set (int unit, int isopen, int isup)
-{
-    if (still_ppp()) {
-	int x = get_flags(ppp_dev_fd);
-	x = isopen? x | SC_CCP_OPEN : x &~ SC_CCP_OPEN;
-	x = isup?   x | SC_CCP_UP   : x &~ SC_CCP_UP;
-	set_flags (ppp_dev_fd, x);
-    }
-}
-
-#ifdef PPP_FILTER
-/*
- * set_filters - set the active and pass filters in the kernel driver.
- */
-int set_filters(struct bpf_program *pass, struct bpf_program *active)
-{
-	struct sock_fprog fp;
-
-	fp.len = pass->bf_len;
-	fp.filter = (struct sock_filter *) pass->bf_insns;
-	if (ioctl(ppp_dev_fd, PPPIOCSPASS, &fp) < 0) {
-		if (errno == ENOTTY)
-			warn("kernel does not support PPP filtering");
-		else
-			error("Couldn't set pass-filter in kernel: %m");
-		return 0;
-	}
-	fp.len = active->bf_len;
-	fp.filter = (struct sock_filter *) active->bf_insns;
-	if (ioctl(ppp_dev_fd, PPPIOCSACTIVE, &fp) < 0) {
-		error("Couldn't set active-filter in kernel: %m");
-		return 0;
-	}
-	return 1;
-}
-#endif /* PPP_FILTER */
-
-/********************************************************************
- *
- * get_idle_time - return how long the link has been idle.
- */
-int
-get_idle_time(u, ip)
-    int u;
-    struct ppp_idle *ip;
-{
-    return ioctl(ppp_dev_fd, PPPIOCGIDLE, ip) >= 0;
-} 
-
-/********************************************************************
- *
- * get_ppp_stats - return statistics for the link.
- */
-int
-get_ppp_stats(u, stats)
-    int u;
-    struct pppd_stats *stats;
-{
-    struct ifpppstatsreq req;
-
-    memset (&req, 0, sizeof (req));
-
-    req.stats_ptr = (caddr_t) &req.stats;
-    strlcpy(req.ifr__name, ifname, sizeof(req.ifr__name));
-    if (ioctl(sock_fd, SIOCGPPPSTATS, &req) < 0) {
-	error("Couldn't get PPP statistics: %m");
-	return 0;
-    }
-    stats->bytes_in = req.stats.p.ppp_ibytes;
-    stats->bytes_out = req.stats.p.ppp_obytes;
-    return 1;
-}
-
-/********************************************************************
- *
- * ccp_fatal_error - returns 1 if decompression was disabled as a
- * result of an error detected after decompression of a packet,
- * 0 otherwise.  This is necessary because of patent nonsense.
- */
-
-int ccp_fatal_error (int unit)
-{
-    int x = get_flags(ppp_dev_fd);
-
-    return x & SC_DC_FERROR;
-}
-
-/********************************************************************
- *
- * path_to_procfs - find the path to the proc file system mount point
- */
-static char proc_path[MAXPATHLEN];
-static int proc_path_len;
-
-static char *path_to_procfs(const char *tail)
-{
-    struct mntent *mntent;
-    FILE *fp;
-
-    if (proc_path_len == 0) {
-	/* Default the mount location of /proc */
-	strlcpy (proc_path, "/proc", sizeof(proc_path));
-	proc_path_len = 5;
-	fp = fopen(MOUNTED, "r");
-	if (fp != NULL) {
-	    while ((mntent = getmntent(fp)) != NULL) {
-		if (strcmp(mntent->mnt_type, MNTTYPE_IGNORE) == 0)
-		    continue;
-		if (strcmp(mntent->mnt_type, "proc") == 0) {
-		    strlcpy(proc_path, mntent->mnt_dir, sizeof(proc_path));
-		    proc_path_len = strlen(proc_path);
-		    break;
-		}
-	    }
-	    fclose (fp);
-	}
-    }
-
-    strlcpy(proc_path + proc_path_len, tail,
-	    sizeof(proc_path) - proc_path_len);
-    return proc_path;
-}
-
-/*
- * /proc/net/route parsing stuff.
- */
-#define ROUTE_MAX_COLS	12
-FILE *route_fd = (FILE *) 0;
-static char route_buffer[512];
-static int route_dev_col, route_dest_col, route_gw_col;
-static int route_flags_col, route_mask_col;
-static int route_num_cols;
-
-static int open_route_table (void);
-static void close_route_table (void);
-static int read_route_table (struct rtentry *rt);
-
-/********************************************************************
- *
- * close_route_table - close the interface to the route table
- */
-
-static void close_route_table (void)
-{
-    if (route_fd != (FILE *) 0) {
-        fclose (route_fd);
-        route_fd = (FILE *) 0;
-    }
-}
-
-/********************************************************************
- *
- * open_route_table - open the interface to the route table
- */
-static char route_delims[] = " \t\n";
-
-static int open_route_table (void)
-{
-    char *path;
-
-    close_route_table();
-
-    path = path_to_procfs("/net/route");
-    route_fd = fopen (path, "r");
-    if (route_fd == NULL) {
-        error("can't open routing table %s: %m", path);
-        return 0;
-    }
-
-    route_dev_col = 0;		/* default to usual columns */
-    route_dest_col = 1;
-    route_gw_col = 2;
-    route_flags_col = 3;
-    route_mask_col = 7;
-    route_num_cols = 8;
-
-    /* parse header line */
-    if (fgets(route_buffer, sizeof(route_buffer), route_fd) != 0) {
-	char *p = route_buffer, *q;
-	int col;
-	for (col = 0; col < ROUTE_MAX_COLS; ++col) {
-	    int used = 1;
-	    if ((q = strtok(p, route_delims)) == 0)
-		break;
-	    if (strcasecmp(q, "iface") == 0)
-		route_dev_col = col;
-	    else if (strcasecmp(q, "destination") == 0)
-		route_dest_col = col;
-	    else if (strcasecmp(q, "gateway") == 0)
-		route_gw_col = col;
-	    else if (strcasecmp(q, "flags") == 0)
-		route_flags_col = col;
-	    else if (strcasecmp(q, "mask") == 0)
-		route_mask_col = col;
-	    else
-		used = 0;
-	    if (used && col >= route_num_cols)
-		route_num_cols = col + 1;
-	    p = NULL;
-	}
-    }
-
-    return 1;
-}
-
-/********************************************************************
- *
- * read_route_table - read the next entry from the route table
- */
-
-static int read_route_table(struct rtentry *rt)
-{
-    char *cols[ROUTE_MAX_COLS], *p;
-    int col;
-	
-    memset (rt, '\0', sizeof (struct rtentry));
-
-    if (fgets (route_buffer, sizeof (route_buffer), route_fd) == (char *) 0)
-	return 0;
-
-    p = route_buffer;
-    for (col = 0; col < route_num_cols; ++col) {
-	cols[col] = strtok(p, route_delims);
-	if (cols[col] == NULL)
-	    return 0;		/* didn't get enough columns */
-	p = NULL;
-    }
-
-    SIN_ADDR(rt->rt_dst) = strtoul(cols[route_dest_col], NULL, 16);
-    SIN_ADDR(rt->rt_gateway) = strtoul(cols[route_gw_col], NULL, 16);
-    SIN_ADDR(rt->rt_genmask) = strtoul(cols[route_mask_col], NULL, 16);
-
-    rt->rt_flags = (short) strtoul(cols[route_flags_col], NULL, 16);
-    rt->rt_dev   = cols[route_dev_col];
-
-    return 1;
-}
-
-/********************************************************************
- *
- * defaultroute_exists - determine if there is a default route
- */
-
-static int defaultroute_exists (struct rtentry *rt)
-{
-    int result = 0;
-
-    if (!open_route_table())
-        return 0;
-
-    while (read_route_table(rt) != 0) {
-        if ((rt->rt_flags & RTF_UP) == 0)
-	    continue;
-
-	if (kernel_version > KVERSION(2,1,0) && SIN_ADDR(rt->rt_genmask) != 0)
-	    continue;
-        if (SIN_ADDR(rt->rt_dst) == 0L) {
-	    result = 1;
-	    break;
-	}
-    }
-
-    close_route_table();
-    return result;
-}
-
-/*
- * have_route_to - determine if the system has any route to
- * a given IP address.  `addr' is in network byte order.
- * Return value is 1 if yes, 0 if no, -1 if don't know.
- * For demand mode to work properly, we have to ignore routes
- * through our own interface.
- */
-int have_route_to(u_int32_t addr)
-{
-    struct rtentry rt;
-    int result = 0;
-
-    if (!open_route_table())
-	return -1;		/* don't know */
-
-    while (read_route_table(&rt)) {
-	if ((rt.rt_flags & RTF_UP) == 0 || strcmp(rt.rt_dev, ifname) == 0)
-	    continue;
-	if ((addr & SIN_ADDR(rt.rt_genmask)) == SIN_ADDR(rt.rt_dst)) {
-	    result = 1;
-	    break;
-	}
-    }
-
-    close_route_table();
-    return result;
-}
-
-/********************************************************************
- *
- * sifdefaultroute - assign a default route through the address given.
- */
-
-int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway)
-{
-    struct rtentry rt;
-
-    if (defaultroute_exists(&rt) && strcmp(rt.rt_dev, ifname) != 0) {
-	u_int32_t old_gateway = SIN_ADDR(rt.rt_gateway);
-
-	if (old_gateway != gateway)
-	    error("not replacing existing default route to %s [%I]",
-		  rt.rt_dev, old_gateway);
-	return 0;
-    }
-
-    memset (&rt, '\0', sizeof (rt));
-    SET_SA_FAMILY (rt.rt_dst,     AF_INET);
-    SET_SA_FAMILY (rt.rt_gateway, AF_INET);
-
-    if (kernel_version > KVERSION(2,1,0)) {
-	SET_SA_FAMILY (rt.rt_genmask, AF_INET);
-	SIN_ADDR(rt.rt_genmask) = 0L;
-    }
-
-    SIN_ADDR(rt.rt_gateway) = gateway;
-    
-    rt.rt_flags = RTF_UP | RTF_GATEWAY;
-    if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) {
-	if ( ! ok_error ( errno ))
-	    error("default route ioctl(SIOCADDRT): %m(%d)", errno);
-	return 0;
-    }
-
-    default_route_gateway = gateway;
-    return 1;
-}
-
-/********************************************************************
- *
- * cifdefaultroute - delete a default route through the address given.
- */
-
-int cifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway)
-{
-    struct rtentry rt;
-
-    default_route_gateway = 0;
-
-    memset (&rt, '\0', sizeof (rt));
-    SET_SA_FAMILY (rt.rt_dst,     AF_INET);
-    SET_SA_FAMILY (rt.rt_gateway, AF_INET);
-
-    if (kernel_version > KVERSION(2,1,0)) {
-	SET_SA_FAMILY (rt.rt_genmask, AF_INET);
-	SIN_ADDR(rt.rt_genmask) = 0L;
-    }
-
-    SIN_ADDR(rt.rt_gateway) = gateway;
-    
-    rt.rt_flags = RTF_UP | RTF_GATEWAY;
-    if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) {
-	if (still_ppp()) {
-	    if ( ! ok_error ( errno ))
-		error("default route ioctl(SIOCDELRT): %m (%d)", errno);
-	    return 0;
-	}
-    }
-
-    return 1;
-}
-
-/********************************************************************
- *
- * sifproxyarp - Make a proxy ARP entry for the peer.
- */
-
-int sifproxyarp (int unit, u_int32_t his_adr)
-{
-    struct arpreq arpreq;
-    char *forw_path;
-
-    if (has_proxy_arp == 0) {
-	memset (&arpreq, '\0', sizeof(arpreq));
-    
-	SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
-	SIN_ADDR(arpreq.arp_pa) = his_adr;
-	arpreq.arp_flags = ATF_PERM | ATF_PUBL;
-/*
- * Get the hardware address of an interface on the same subnet
- * as our local address.
- */
-	if (!get_ether_addr(his_adr, &arpreq.arp_ha, proxy_arp_dev,
-			    sizeof(proxy_arp_dev))) {
-	    error("Cannot determine ethernet address for proxy ARP");
-	    return 0;
-	}
-	strlcpy(arpreq.arp_dev, proxy_arp_dev, sizeof(arpreq.arp_dev));
-
-	if (ioctl(sock_fd, SIOCSARP, (caddr_t)&arpreq) < 0) {
-	    if ( ! ok_error ( errno ))
-		error("ioctl(SIOCSARP): %m(%d)", errno);
-	    return 0;
-	}
-	proxy_arp_addr = his_adr;
-	has_proxy_arp = 1;
-
-	if (tune_kernel) {
-	    forw_path = path_to_procfs("/sys/net/ipv4/ip_forward");
-	    if (forw_path != 0) {
-		int fd = open(forw_path, O_WRONLY);
-		if (fd >= 0) {
-		    if (write(fd, "1", 1) != 1)
-			error("Couldn't enable IP forwarding: %m");
-		    close(fd);
-		}
-	    }
-	}
-    }
-
-    return 1;
-}
-
-/********************************************************************
- *
- * cifproxyarp - Delete the proxy ARP entry for the peer.
- */
-
-int cifproxyarp (int unit, u_int32_t his_adr)
-{
-    struct arpreq arpreq;
-
-    if (has_proxy_arp) {
-	has_proxy_arp = 0;
-	memset (&arpreq, '\0', sizeof(arpreq));
-	SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
-	SIN_ADDR(arpreq.arp_pa) = his_adr;
-	arpreq.arp_flags = ATF_PERM | ATF_PUBL;
-	strlcpy(arpreq.arp_dev, proxy_arp_dev, sizeof(arpreq.arp_dev));
-
-	if (ioctl(sock_fd, SIOCDARP, (caddr_t)&arpreq) < 0) {
-	    if ( ! ok_error ( errno ))
-		warn("ioctl(SIOCDARP): %m(%d)", errno);
-	    return 0;
-	}
-    }
-    return 1;
-}
-     
-/********************************************************************
- *
- * get_ether_addr - get the hardware address of an interface on the
- * the same subnet as ipaddr.
- */
-
-static int get_ether_addr (u_int32_t ipaddr,
-			   struct sockaddr *hwaddr,
-			   char *name, int namelen)
-{
-    struct ifreq *ifr, *ifend;
-    u_int32_t ina, mask;
-    char *aliasp;
-    struct ifreq ifreq;
-    struct ifconf ifc;
-    struct ifreq ifs[MAX_IFS];
-    
-    ifc.ifc_len = sizeof(ifs);
-    ifc.ifc_req = ifs;
-    if (ioctl(sock_fd, SIOCGIFCONF, &ifc) < 0) {
-	if ( ! ok_error ( errno ))
-	    error("ioctl(SIOCGIFCONF): %m(%d)", errno);
-	return 0;
-    }
-
-    SYSDEBUG ((LOG_DEBUG, "proxy arp: scanning %d interfaces for IP %s",
-		ifc.ifc_len / sizeof(struct ifreq), ip_ntoa(ipaddr)));
-/*
- * Scan through looking for an interface with an Internet
- * address on the same subnet as `ipaddr'.
- */
-    ifend = ifs + (ifc.ifc_len / sizeof(struct ifreq));
-    for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
-	if (ifr->ifr_addr.sa_family == AF_INET) {
-	    ina = SIN_ADDR(ifr->ifr_addr);
-	    strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
-            SYSDEBUG ((LOG_DEBUG, "proxy arp: examining interface %s",
-			ifreq.ifr_name));
-/*
- * Check that the interface is up, and not point-to-point
- * nor loopback.
- */
-	    if (ioctl(sock_fd, SIOCGIFFLAGS, &ifreq) < 0)
-		continue;
-
-	    if (((ifreq.ifr_flags ^ FLAGS_GOOD) & FLAGS_MASK) != 0)
-		continue;
-/*
- * Get its netmask and check that it's on the right subnet.
- */
-	    if (ioctl(sock_fd, SIOCGIFNETMASK, &ifreq) < 0)
-	        continue;
-
-	    mask = SIN_ADDR(ifreq.ifr_addr);
-	    SYSDEBUG ((LOG_DEBUG, "proxy arp: interface addr %s mask %lx",
-			ip_ntoa(ina), ntohl(mask)));
-
-	    if (((ipaddr ^ ina) & mask) != 0)
-	        continue;
-	    break;
-	}
-    }
-    
-    if (ifr >= ifend)
-        return 0;
-
-    strlcpy(name, ifreq.ifr_name, namelen);
-
-    /* trim off the :1 in eth0:1 */
-    aliasp = strchr(name, ':');
-    if (aliasp != 0)
-	*aliasp = 0;
-
-    info("found interface %s for proxy arp", name);
-/*
- * Now get the hardware address.
- */
-    memset (&ifreq.ifr_hwaddr, 0, sizeof (struct sockaddr));
-    if (ioctl (sock_fd, SIOCGIFHWADDR, &ifreq) < 0) {
-        error("SIOCGIFHWADDR(%s): %m(%d)", ifreq.ifr_name, errno);
-        return 0;
-    }
-
-    memcpy (hwaddr,
-	    &ifreq.ifr_hwaddr,
-	    sizeof (struct sockaddr));
-
-    SYSDEBUG ((LOG_DEBUG,
-	   "proxy arp: found hwaddr %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
-		(int) ((unsigned char *) &hwaddr->sa_data)[0],
-		(int) ((unsigned char *) &hwaddr->sa_data)[1],
-		(int) ((unsigned char *) &hwaddr->sa_data)[2],
-		(int) ((unsigned char *) &hwaddr->sa_data)[3],
-		(int) ((unsigned char *) &hwaddr->sa_data)[4],
-		(int) ((unsigned char *) &hwaddr->sa_data)[5],
-		(int) ((unsigned char *) &hwaddr->sa_data)[6],
-		(int) ((unsigned char *) &hwaddr->sa_data)[7]));
-    return 1;
-}
-
-/*
- * get_if_hwaddr - get the hardware address for the specified
- * network interface device.
- */
-int
-get_if_hwaddr(u_char *addr, char *name)
-{
-	struct ifreq ifreq;
-	int ret, sock_fd;
-
-	sock_fd = socket(AF_INET, SOCK_DGRAM, 0);
-	if (sock_fd < 0)
-		return 0;
-	memset(&ifreq.ifr_hwaddr, 0, sizeof(struct sockaddr));
-	strlcpy(ifreq.ifr_name, name, sizeof(ifreq.ifr_name));
-	ret = ioctl(sock_fd, SIOCGIFHWADDR, &ifreq);
-	close(sock_fd);
-	if (ret >= 0)
-		memcpy(addr, ifreq.ifr_hwaddr.sa_data, 6);
-	return ret;
-}
-
-/*
- * get_first_ethernet - return the name of the first ethernet-style
- * interface on this system.
- */
-char *
-get_first_ethernet()
-{
-	return "eth0";
-}
-
-/********************************************************************
- *
- * Return user specified netmask, modified by any mask we might determine
- * for address `addr' (in network byte order).
- * Here we scan through the system's list of interfaces, looking for
- * any non-point-to-point interfaces which might appear to be on the same
- * network as `addr'.  If we find any, we OR in their netmask to the
- * user-specified netmask.
- */
-
-u_int32_t GetMask (u_int32_t addr)
-{
-    u_int32_t mask, nmask, ina;
-    struct ifreq *ifr, *ifend, ifreq;
-    struct ifconf ifc;
-    struct ifreq ifs[MAX_IFS];
-
-    addr = ntohl(addr);
-    
-    if (IN_CLASSA(addr))	/* determine network mask for address class */
-	nmask = IN_CLASSA_NET;
-    else if (IN_CLASSB(addr))
-	    nmask = IN_CLASSB_NET;
-    else
-	    nmask = IN_CLASSC_NET;
-    
-    /* class D nets are disallowed by bad_ip_adrs */
-    mask = netmask | htonl(nmask);
-/*
- * Scan through the system's network interfaces.
- */
-    ifc.ifc_len = sizeof(ifs);
-    ifc.ifc_req = ifs;
-    if (ioctl(sock_fd, SIOCGIFCONF, &ifc) < 0) {
-	if ( ! ok_error ( errno ))
-	    warn("ioctl(SIOCGIFCONF): %m(%d)", errno);
-	return mask;
-    }
-    
-    ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
-    for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
-/*
- * Check the interface's internet address.
- */
-	if (ifr->ifr_addr.sa_family != AF_INET)
-	    continue;
-	ina = SIN_ADDR(ifr->ifr_addr);
-	if (((ntohl(ina) ^ addr) & nmask) != 0)
-	    continue;
-/*
- * Check that the interface is up, and not point-to-point nor loopback.
- */
-	strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
-	if (ioctl(sock_fd, SIOCGIFFLAGS, &ifreq) < 0)
-	    continue;
-	
-	if (((ifreq.ifr_flags ^ FLAGS_GOOD) & FLAGS_MASK) != 0)
-	    continue;
-/*
- * Get its netmask and OR it into our mask.
- */
-	if (ioctl(sock_fd, SIOCGIFNETMASK, &ifreq) < 0)
-	    continue;
-	mask |= SIN_ADDR(ifreq.ifr_addr);
-	break;
-    }
-    return mask;
-}
-
-/********************************************************************
- *
- * Internal routine to decode the version.modification.patch level
- */
-
-static void decode_version (char *buf, int *version,
-			    int *modification, int *patch)
-{
-    char *endp;
-
-    *version      = (int) strtoul (buf, &endp, 10);
-    *modification = 0;
-    *patch        = 0;
-    
-    if (endp != buf && *endp == '.') {
-	buf = endp + 1;
-	*modification = (int) strtoul (buf, &endp, 10);
-	if (endp != buf && *endp == '.') {
-	    buf = endp + 1;
-	    *patch = (int) strtoul (buf, &buf, 10);
-	}
-    }
-}
-
-/********************************************************************
- *
- * Procedure to determine if the PPP line discipline is registered.
- */
-
-static int
-ppp_registered(void)
-{
-    int local_fd;
-    int mfd = -1;
-    int ret = 0;
-    char slave[16];
-
-    /*
-     * We used to open the serial device and set it to the ppp line
-     * discipline here, in order to create a ppp unit.  But that is
-     * not a good idea - the user might have specified a device that
-     * they can't open (permission, or maybe it doesn't really exist).
-     * So we grab a pty master/slave pair and use that.
-     */
-    if (!get_pty(&mfd, &local_fd, slave, 0)) {
-	no_ppp_msg = "Couldn't determine if PPP is supported (no free ptys)";
-	return 0;
-    }
-
-    /*
-     * Try to put the device into the PPP discipline.
-     */
-    if (ioctl(local_fd, TIOCSETD, &ppp_disc) < 0) {
-	error("ioctl(TIOCSETD(PPP)): %m(%d)", errno);
-    } else
-	ret = 1;
-    
-    close(local_fd);
-    close(mfd);
-    return ret;
-}
-
-/********************************************************************
- *
- * ppp_available - check whether the system has any ppp interfaces
- * (in fact we check whether we can do an ioctl on ppp0).
- */
-
-int ppp_available(void)
-{
-    int s, ok, fd;
-    struct ifreq ifr;
-    int    size;
-    int    my_version, my_modification, my_patch;
-    int osmaj, osmin, ospatch;
-
-    no_ppp_msg = 
-	"This system lacks kernel support for PPP.  This could be because\n"
-	"the PPP kernel module could not be loaded, or because PPP was not\n"
-	"included in the kernel configuration.  If PPP was included as a\n"
-	"module, try `/sbin/modprobe -v ppp'.  If that fails, check that\n"
-	"ppp.o exists in /lib/modules/`uname -r`/net.\n"
-	"See README.linux file in the ppp distribution for more details.\n";
-
-    /* get the kernel version now, since we are called before sys_init */
-    uname(&utsname);
-    osmaj = osmin = ospatch = 0;
-    sscanf(utsname.release, "%d.%d.%d", &osmaj, &osmin, &ospatch);
-    kernel_version = KVERSION(osmaj, osmin, ospatch);
-
-    fd = open("/dev/ppp", O_RDWR);
-#if 0
-    if (fd < 0 && errno == ENOENT) {
-	/* try making it and see if that helps. */
-	if (mknod("/dev/ppp", S_IFCHR | S_IRUSR | S_IWUSR,
-		  makedev(108, 0)) >= 0) {
-	    fd = open("/dev/ppp", O_RDWR);
-	    if (fd >= 0)
-		info("Created /dev/ppp device node");
-	    else
-		unlink("/dev/ppp");	/* didn't work, undo the mknod */
-	} else if (errno == EEXIST) {
-	    fd = open("/dev/ppp", O_RDWR);
-	}
-    }
-#endif /* 0 */
-    if (fd >= 0) {
-	new_style_driver = 1;
-
-	/* XXX should get from driver */
-	driver_version = 2;
-	driver_modification = 4;
-	driver_patch = 0;
-	close(fd);
-	return 1;
-    }
-    if (kernel_version >= KVERSION(2,3,13)) {
-	if (errno == ENOENT)
-	    no_ppp_msg =
-		"pppd is unable to open the /dev/ppp device.\n"
-		"You need to create the /dev/ppp device node by\n"
-		"executing the following command as root:\n"
-		"	mknod /dev/ppp c 108 0\n";
-	return 0;
-    }
-
-/*
- * Open a socket for doing the ioctl operations.
- */    
-    s = socket(AF_INET, SOCK_DGRAM, 0);
-    if (s < 0)
-	return 0;
-    
-    strlcpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
-    ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
-/*
- * If the device did not exist then attempt to create one by putting the
- * current tty into the PPP discipline. If this works then obtain the
- * flags for the device again.
- */
-    if (!ok) {
-	if (ppp_registered()) {
-	    strlcpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
-	    ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
-	}
-    }
-/*
- * Ensure that the hardware address is for PPP and not something else
- */
-    if (ok)
-        ok = ioctl (s, SIOCGIFHWADDR, (caddr_t) &ifr) >= 0;
-
-    if (ok && ((ifr.ifr_hwaddr.sa_family & ~0xFF) != ARPHRD_PPP))
-        ok = 0;
-
-/*
- *  This is the PPP device. Validate the version of the driver at this
- *  point to ensure that this program will work with the driver.
- */
-    if (ok) {
-	char   abBuffer [1024];
-
-	ifr.ifr_data = abBuffer;
-	size = ioctl (s, SIOCGPPPVER, (caddr_t) &ifr);
-	if (size < 0) {
-	    error("Couldn't read driver version: %m");
-	    ok = 0;
-	    no_ppp_msg = "Sorry, couldn't verify kernel driver version\n";
-
-	} else {
-	    decode_version(abBuffer,
-			   &driver_version,
-			   &driver_modification,
-			   &driver_patch);
-/*
- * Validate the version of the driver against the version that we used.
- */
-	    decode_version(VERSION,
-			   &my_version,
-			   &my_modification,
-			   &my_patch);
-
-	    /* The version numbers must match */
-	    if (driver_version != my_version)
-		ok = 0;
-      
-	    /* The modification levels must be legal */
-	    if (driver_modification < 3) {
-		if (driver_modification >= 2) {
-		    /* we can cope with 2.2.0 and above */
-		    driver_is_old = 1;
-		} else {
-		    ok = 0;
-		}
-	    }
-
-	    close (s);
-	    if (!ok) {
-		slprintf(route_buffer, sizeof(route_buffer),
-			 "Sorry - PPP driver version %d.%d.%d is out of date\n",
-			 driver_version, driver_modification, driver_patch);
-
-		no_ppp_msg = route_buffer;
-	    }
-	}
-    }
-    return ok;
-}
-
-/********************************************************************
- *
- * Update the wtmp file with the appropriate user name and tty device.
- */
-
-void logwtmp (const char *line, const char *name, const char *host)
-{
-    struct utmp ut, *utp;
-    pid_t  mypid = getpid();
-#if __GLIBC__ < 2
-    int    wtmp;
-#endif
-
-/*
- * Update the signon database for users.
- * Christoph Lameter: Copied from poeigl-1.36 Jan 3, 1996
- */
-    utmpname(_PATH_UTMP);
-    setutent();
-    while ((utp = getutent()) && (utp->ut_pid != mypid))
-        /* nothing */;
-
-    /* Is this call really necessary? There is another one after the 'put' */
-    endutent();
-    
-    if (utp)
-	memcpy(&ut, utp, sizeof(ut));
-    else
-	/* some gettys/telnetds don't initialize utmp... */
-	memset(&ut, 0, sizeof(ut));
-
-    if (ut.ut_id[0] == 0)
-	strncpy(ut.ut_id, line + 3, sizeof(ut.ut_id));
-	
-    strncpy(ut.ut_user, name, sizeof(ut.ut_user));
-    strncpy(ut.ut_line, line, sizeof(ut.ut_line));
-
-    time(&ut.ut_time);
-
-    ut.ut_type = USER_PROCESS;
-    ut.ut_pid  = mypid;
-
-    /* Insert the host name if one is supplied */
-    if (*host)
-	strncpy (ut.ut_host, host, sizeof(ut.ut_host));
-
-    /* Insert the IP address of the remote system if IP is enabled */
-    if (ipcp_protent.enabled_flag && ipcp_hisoptions[0].neg_addr)
-	memcpy(&ut.ut_addr, (char *) &ipcp_hisoptions[0].hisaddr,
-		 sizeof(ut.ut_addr));
-	
-    /* CL: Makes sure that the logout works */
-    if (*host == 0 && *name==0)
-	ut.ut_host[0]=0;
-
-    pututline(&ut);
-    endutent();
-/*
- * Update the wtmp file.
- */
-#if __GLIBC__ >= 2
-    updwtmp(_PATH_WTMP, &ut);
-#else
-    wtmp = open(_PATH_WTMP, O_APPEND|O_WRONLY);
-    if (wtmp >= 0) {
-	flock(wtmp, LOCK_EX);
-
-	if (write (wtmp, (char *)&ut, sizeof(ut)) != sizeof(ut))
-	    warn("error writing %s: %m", _PATH_WTMP);
-
-	flock(wtmp, LOCK_UN);
-
-	close (wtmp);
-    }
-#endif
-}
-
-
-/********************************************************************
- *
- * sifvjcomp - config tcp header compression
- */
-
-int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid)
-{
-    u_int x = get_flags(ppp_dev_fd);
-
-    if (vjcomp) {
-        if (ioctl (ppp_dev_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
-	    if (! ok_error (errno))
-		error("ioctl(PPPIOCSMAXCID): %m(%d)", errno);
-	    vjcomp = 0;
-	}
-    }
-
-    x = vjcomp  ? x | SC_COMP_TCP     : x &~ SC_COMP_TCP;
-    x = cidcomp ? x & ~SC_NO_TCP_CCID : x | SC_NO_TCP_CCID;
-    set_flags (ppp_dev_fd, x);
-
-    return 1;
-}
-
-/********************************************************************
- *
- * sifup - Config the interface up and enable IP packets to pass.
- */
-
-int sifup(int u)
-{
-    struct ifreq ifr;
-
-    memset (&ifr, '\0', sizeof (ifr));
-    strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
-    if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
-	if (! ok_error (errno))
-	    error("ioctl (SIOCGIFFLAGS): %m(%d)", errno);
-	return 0;
-    }
-
-    ifr.ifr_flags |= (IFF_UP | IFF_POINTOPOINT);
-    if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
-	if (! ok_error (errno))
-	    error("ioctl(SIOCSIFFLAGS): %m(%d)", errno);
-	return 0;
-    }
-    if_is_up++;
-
-    return 1;
-}
-
-/********************************************************************
- *
- * sifdown - Disable the indicated protocol and config the interface
- *	     down if there are no remaining protocols.
- */
-
-int sifdown (int u)
-{
-    struct ifreq ifr;
-
-    if (if_is_up && --if_is_up > 0)
-	return 1;
-
-    memset (&ifr, '\0', sizeof (ifr));
-    strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
-    if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
-	if (! ok_error (errno))
-	    error("ioctl (SIOCGIFFLAGS): %m(%d)", errno);
-	return 0;
-    }
-
-    ifr.ifr_flags &= ~IFF_UP;
-    ifr.ifr_flags |= IFF_POINTOPOINT;
-    if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
-	if (! ok_error (errno))
-	    error("ioctl(SIOCSIFFLAGS): %m(%d)", errno);
-	return 0;
-    }
-    return 1;
-}
-
-/********************************************************************
- *
- * sifaddr - Config the interface IP addresses and netmask.
- */
-
-int sifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr,
-	     u_int32_t net_mask)
-{
-    struct ifreq   ifr; 
-    struct rtentry rt;
-    
-    memset (&ifr, '\0', sizeof (ifr));
-    memset (&rt,  '\0', sizeof (rt));
-    
-    SET_SA_FAMILY (ifr.ifr_addr,    AF_INET); 
-    SET_SA_FAMILY (ifr.ifr_dstaddr, AF_INET); 
-    SET_SA_FAMILY (ifr.ifr_netmask, AF_INET); 
-
-    strlcpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
-/*
- *  Set our IP address
- */
-    SIN_ADDR(ifr.ifr_addr) = our_adr;
-    if (ioctl(sock_fd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
-	if (errno != EEXIST) {
-	    if (! ok_error (errno))
-		error("ioctl(SIOCSIFADDR): %m(%d)", errno);
-	}
-        else {
-	    warn("ioctl(SIOCSIFADDR): Address already exists");
-	}
-        return (0);
-    }
-/*
- *  Set the gateway address
- */
-    SIN_ADDR(ifr.ifr_dstaddr) = his_adr;
-    if (ioctl(sock_fd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
-	if (! ok_error (errno))
-	    error("ioctl(SIOCSIFDSTADDR): %m(%d)", errno); 
-	return (0);
-    } 
-/*
- *  Set the netmask.
- *  For recent kernels, force the netmask to 255.255.255.255.
- */
-    if (kernel_version >= KVERSION(2,1,16))
-	net_mask = ~0L;
-    if (net_mask != 0) {
-	SIN_ADDR(ifr.ifr_netmask) = net_mask;
-	if (ioctl(sock_fd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
-	    if (! ok_error (errno))
-		error("ioctl(SIOCSIFNETMASK): %m(%d)", errno); 
-	    return (0);
-	} 
-    }
-/*
- *  Add the device route
- */
-    if (kernel_version < KVERSION(2,1,16)) {
-	SET_SA_FAMILY (rt.rt_dst,     AF_INET);
-	SET_SA_FAMILY (rt.rt_gateway, AF_INET);
-	rt.rt_dev = ifname;
-
-	SIN_ADDR(rt.rt_gateway) = 0L;
-	SIN_ADDR(rt.rt_dst)     = his_adr;
-	rt.rt_flags = RTF_UP | RTF_HOST;
-
-	if (kernel_version > KVERSION(2,1,0)) {
-	    SET_SA_FAMILY (rt.rt_genmask, AF_INET);
-	    SIN_ADDR(rt.rt_genmask) = -1L;
-	}
-
-	if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) {
-	    if (! ok_error (errno))
-		error("ioctl(SIOCADDRT) device route: %m(%d)", errno);
-	    return (0);
-	}
-    }
-
-    /* set ip_dynaddr in demand mode if address changes */
-    if (demand && tune_kernel && !dynaddr_set
-	&& our_old_addr && our_old_addr != our_adr) {
-	/* set ip_dynaddr if possible */
-	char *path;
-	int fd;
-
-	path = path_to_procfs("/sys/net/ipv4/ip_dynaddr");
-	if (path != 0 && (fd = open(path, O_WRONLY)) >= 0) {
-	    if (write(fd, "1", 1) != 1)
-		error("Couldn't enable dynamic IP addressing: %m");
-	    close(fd);
-	}
-	dynaddr_set = 1;	/* only 1 attempt */
-    }
-    our_old_addr = 0;
-
-    return 1;
-}
-
-/********************************************************************
- *
- * cifaddr - Clear the interface IP addresses, and delete routes
- * through the interface if possible.
- */
-
-int cifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr)
-{
-    struct ifreq ifr;
-
-    if (kernel_version < KVERSION(2,1,16)) {
-/*
- *  Delete the route through the device
- */
-	struct rtentry rt;
-	memset (&rt, '\0', sizeof (rt));
-
-	SET_SA_FAMILY (rt.rt_dst,     AF_INET);
-	SET_SA_FAMILY (rt.rt_gateway, AF_INET);
-	rt.rt_dev = ifname;
-
-	SIN_ADDR(rt.rt_gateway) = 0;
-	SIN_ADDR(rt.rt_dst)     = his_adr;
-	rt.rt_flags = RTF_UP | RTF_HOST;
-
-	if (kernel_version > KVERSION(2,1,0)) {
-	    SET_SA_FAMILY (rt.rt_genmask, AF_INET);
-	    SIN_ADDR(rt.rt_genmask) = -1L;
-	}
-
-	if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) {
-	    if (still_ppp() && ! ok_error (errno))
-		error("ioctl(SIOCDELRT) device route: %m(%d)", errno);
-	    return (0);
-	}
-    }
-
-    /* This way it is possible to have an IPX-only or IPv6-only interface */
-    memset(&ifr, 0, sizeof(ifr));
-    SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
-    strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
-    
-    if (ioctl(sock_fd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
-	if (! ok_error (errno)) {
-	    error("ioctl(SIOCSIFADDR): %m(%d)", errno);
-	    return 0;
-	}
-    }
-
-    our_old_addr = our_adr;
-
-    return 1;
-}
-
-#ifdef INET6
-/********************************************************************
- * 
- * sif6addr - Config the interface with an IPv6 link-local address
- */
-int sif6addr (int unit, eui64_t our_eui64, eui64_t his_eui64)
-{
-    struct in6_ifreq ifr6;
-    struct ifreq ifr;
-    struct in6_rtmsg rt6;
-
-    if (sock6_fd < 0) {
-	errno = -sock6_fd;
-	error("IPv6 socket creation failed: %m");
-	return 0;
-    }
-    memset(&ifr, 0, sizeof (ifr));
-    strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
-    if (ioctl(sock6_fd, SIOCGIFINDEX, (caddr_t) &ifr) < 0) {
-	error("sif6addr: ioctl(SIOCGIFINDEX): %m (%d)", errno);
-	return 0;
-    }
-    
-    /* Local interface */
-    memset(&ifr6, 0, sizeof(ifr6));
-    IN6_LLADDR_FROM_EUI64(ifr6.ifr6_addr, our_eui64);
-    ifr6.ifr6_ifindex = ifr.ifr_ifindex;
-    ifr6.ifr6_prefixlen = 10;
-
-    if (ioctl(sock6_fd, SIOCSIFADDR, &ifr6) < 0) {
-	error("sif6addr: ioctl(SIOCSIFADDR): %m (%d)", errno);
-	return 0;
-    }
-    
-    /* Route to remote host */
-    memset(&rt6, 0, sizeof(rt6));
-    IN6_LLADDR_FROM_EUI64(rt6.rtmsg_dst, his_eui64);
-    rt6.rtmsg_flags = RTF_UP;
-    rt6.rtmsg_dst_len = 10;
-    rt6.rtmsg_ifindex = ifr.ifr_ifindex;
-    rt6.rtmsg_metric = 1;
-    
-    if (ioctl(sock6_fd, SIOCADDRT, &rt6) < 0) {
-	error("sif6addr: ioctl(SIOCADDRT): %m (%d)", errno);
-	return 0;
-    }
-
-    return 1;
-}
-
-
-/********************************************************************
- *
- * cif6addr - Remove IPv6 address from interface
- */
-int cif6addr (int unit, eui64_t our_eui64, eui64_t his_eui64)
-{
-    struct ifreq ifr;
-    struct in6_ifreq ifr6;
-
-    if (sock6_fd < 0) {
-	errno = -sock6_fd;
-	error("IPv6 socket creation failed: %m");
-	return 0;
-    }
-    memset(&ifr, 0, sizeof(ifr));
-    strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
-    if (ioctl(sock6_fd, SIOCGIFINDEX, (caddr_t) &ifr) < 0) {
-	error("cif6addr: ioctl(SIOCGIFINDEX): %m (%d)", errno);
-	return 0;
-    }
-    
-    memset(&ifr6, 0, sizeof(ifr6));
-    IN6_LLADDR_FROM_EUI64(ifr6.ifr6_addr, our_eui64);
-    ifr6.ifr6_ifindex = ifr.ifr_ifindex;
-    ifr6.ifr6_prefixlen = 10;
-
-    if (ioctl(sock6_fd, SIOCDIFADDR, &ifr6) < 0) {
-	if (errno != EADDRNOTAVAIL) {
-	    if (! ok_error (errno))
-		error("cif6addr: ioctl(SIOCDIFADDR): %m (%d)", errno);
-	}
-        else {
-	    warn("cif6addr: ioctl(SIOCDIFADDR): No such address");
-	}
-        return (0);
-    }
-    return 1;
-}
-#endif /* INET6 */
-
-/*
- * get_pty - get a pty master/slave pair and chown the slave side
- * to the uid given.  Assumes slave_name points to >= 16 bytes of space.
- */
-int
-get_pty(master_fdp, slave_fdp, slave_name, uid)
-    int *master_fdp;
-    int *slave_fdp;
-    char *slave_name;
-    int uid;
-{
-    int i, mfd, sfd = -1;
-    char pty_name[16];
-    struct termios tios;
-
-#ifdef TIOCGPTN
-    /*
-     * Try the unix98 way first.
-     */
-    mfd = open("/dev/ptmx", O_RDWR);
-    if (mfd >= 0) {
-	int ptn;
-	if (ioctl(mfd, TIOCGPTN, &ptn) >= 0) {
-	    slprintf(pty_name, sizeof(pty_name), "/dev/pts/%d", ptn);
-	    chmod(pty_name, S_IRUSR | S_IWUSR);
-#ifdef TIOCSPTLCK
-	    ptn = 0;
-	    if (ioctl(mfd, TIOCSPTLCK, &ptn) < 0)
-		warn("Couldn't unlock pty slave %s: %m", pty_name);
-#endif
-	    if ((sfd = open(pty_name, O_RDWR | O_NOCTTY)) < 0)
-		warn("Couldn't open pty slave %s: %m", pty_name);
-	}
-    }
-#endif /* TIOCGPTN */
-
-    if (sfd < 0) {
-	/* the old way - scan through the pty name space */
-	for (i = 0; i < 64; ++i) {
-	    slprintf(pty_name, sizeof(pty_name), "/dev/pty%c%x",
-		     'p' + i / 16, i % 16);
-	    mfd = open(pty_name, O_RDWR, 0);
-	    if (mfd >= 0) {
-		pty_name[5] = 't';
-		sfd = open(pty_name, O_RDWR | O_NOCTTY, 0);
-		if (sfd >= 0) {
-		    fchown(sfd, uid, -1);
-		    fchmod(sfd, S_IRUSR | S_IWUSR);
-		    break;
-		}
-		close(mfd);
-	    }
-	}
-    }
-
-    if (sfd < 0)
-	return 0;
-
-    strlcpy(slave_name, pty_name, 16);
-    *master_fdp = mfd;
-    *slave_fdp = sfd;
-    if (tcgetattr(sfd, &tios) == 0) {
-	tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
-	tios.c_cflag |= CS8 | CREAD | CLOCAL;
-	tios.c_iflag  = IGNPAR;
-	tios.c_oflag  = 0;
-	tios.c_lflag  = 0;
-	if (tcsetattr(sfd, TCSAFLUSH, &tios) < 0)
-	    warn("couldn't set attributes on pty: %m");
-    } else
-	warn("couldn't get attributes on pty: %m");
-
-    return 1;
-}
-
-/********************************************************************
- *
- * open_loopback - open the device we use for getting packets
- * in demand mode.  Under Linux, we use a pty master/slave pair.
- */
-int
-open_ppp_loopback(void)
-{
-    int flags;
-
-    looped = 1;
-    if (new_style_driver) {
-	/* allocate ourselves a ppp unit */
-	if (make_ppp_unit() < 0)
-	    die(1);
-	set_flags(ppp_dev_fd, SC_LOOP_TRAFFIC);
-	set_kdebugflag(kdebugflag);
-	ppp_fd = -1;
-	return ppp_dev_fd;
-    }
-
-    if (!get_pty(&master_fd, &slave_fd, loop_name, 0))
-	fatal("No free pty for loopback");
-    SYSDEBUG(("using %s for loopback", loop_name));
-
-    set_ppp_fd(slave_fd);
-
-    flags = fcntl(master_fd, F_GETFL);
-    if (flags == -1 ||
-	fcntl(master_fd, F_SETFL, flags | O_NONBLOCK) == -1)
-	warn("couldn't set master loopback to nonblock: %m(%d)", errno);
-
-    flags = fcntl(ppp_fd, F_GETFL);
-    if (flags == -1 ||
-	fcntl(ppp_fd, F_SETFL, flags | O_NONBLOCK) == -1)
-	warn("couldn't set slave loopback to nonblock: %m(%d)", errno);
-
-    if (ioctl(ppp_fd, TIOCSETD, &ppp_disc) < 0)
-	fatal("ioctl(TIOCSETD): %m(%d)", errno);
-/*
- * Find out which interface we were given.
- */
-    if (ioctl(ppp_fd, PPPIOCGUNIT, &ifunit) < 0)
-	fatal("ioctl(PPPIOCGUNIT): %m(%d)", errno);
-/*
- * Enable debug in the driver if requested.
- */
-    set_kdebugflag (kdebugflag);
-
-    return master_fd;
-}
-
-/********************************************************************
- *
- * restore_loop - reattach the ppp unit to the loopback.
- *
- * The kernel ppp driver automatically reattaches the ppp unit to
- * the loopback if the serial port is set to a line discipline other
- * than ppp, or if it detects a modem hangup.  The former will happen
- * in disestablish_ppp if the latter hasn't already happened, so we
- * shouldn't need to do anything.
- *
- * Just to be sure, set the real serial port to the normal discipline.
- */
-
-static void
-restore_loop(void)
-{
-    looped = 1;
-    if (new_style_driver) {
-	set_flags(ppp_dev_fd, get_flags(ppp_dev_fd) | SC_LOOP_TRAFFIC);
-	return;
-    }
-    if (ppp_fd != slave_fd) {
-	(void) ioctl(ppp_fd, TIOCSETD, &tty_disc);
-	set_ppp_fd(slave_fd);
-    }
-}
-
-/********************************************************************
- *
- * sifnpmode - Set the mode for handling packets for a given NP.
- */
-
-int
-sifnpmode(u, proto, mode)
-    int u;
-    int proto;
-    enum NPmode mode;
-{
-    struct npioctl npi;
-
-    npi.protocol = proto;
-    npi.mode     = mode;
-    if (ioctl(ppp_dev_fd, PPPIOCSNPMODE, (caddr_t) &npi) < 0) {
-	if (! ok_error (errno))
-	    error("ioctl(PPPIOCSNPMODE, %d, %d): %m (%d)",
-		   proto, mode, errno);
-	return 0;
-    }
-    return 1;
-}
-
-
-/********************************************************************
- *
- * sipxfaddr - Config the interface IPX networknumber
- */
-
-int sipxfaddr (int unit, unsigned long int network, unsigned char * node )
-{
-    int    result = 1;
-
-#ifdef IPX_CHANGE
-    int    skfd; 
-    struct ifreq         ifr;
-    struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr;
-
-    skfd = socket (AF_IPX, SOCK_DGRAM, 0);
-    if (skfd < 0) { 
-	if (! ok_error (errno))
-	    dbglog("socket(AF_IPX): %m (%d)", errno);
-	result = 0;
-    }
-    else {
-	memset (&ifr, '\0', sizeof (ifr));
-	strlcpy (ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
-
-	memcpy (sipx->sipx_node, node, IPX_NODE_LEN);
-	sipx->sipx_family  = AF_IPX;
-	sipx->sipx_port    = 0;
-	sipx->sipx_network = htonl (network);
-	sipx->sipx_type    = IPX_FRAME_ETHERII;
-	sipx->sipx_action  = IPX_CRTITF;
-/*
- *  Set the IPX device
- */
-	if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
-	    result = 0;
-	    if (errno != EEXIST) {
-		if (! ok_error (errno))
-		    dbglog("ioctl(SIOCSIFADDR, CRTITF): %m (%d)", errno);
-	    }
-	    else {
-		warn("ioctl(SIOCSIFADDR, CRTITF): Address already exists");
-	    }
-	}
-	close (skfd);
-    }
-#endif
-    return result;
-}
-
-/********************************************************************
- *
- * cipxfaddr - Clear the information for the IPX network. The IPX routes
- *	       are removed and the device is no longer able to pass IPX
- *	       frames.
- */
-
-int cipxfaddr (int unit)
-{
-    int    result = 1;
-
-#ifdef IPX_CHANGE
-    int    skfd; 
-    struct ifreq         ifr;
-    struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr;
-
-    skfd = socket (AF_IPX, SOCK_DGRAM, 0);
-    if (skfd < 0) { 
-	if (! ok_error (errno))
-	    dbglog("socket(AF_IPX): %m (%d)", errno);
-	result = 0;
-    }
-    else {
-	memset (&ifr, '\0', sizeof (ifr));
-	strlcpy (ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
-
-	sipx->sipx_type    = IPX_FRAME_ETHERII;
-	sipx->sipx_action  = IPX_DLTITF;
-	sipx->sipx_family  = AF_IPX;
-/*
- *  Set the IPX device
- */
-	if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
-	    if (! ok_error (errno))
-		info("ioctl(SIOCSIFADDR, IPX_DLTITF): %m (%d)", errno);
-	    result = 0;
-	}
-	close (skfd);
-    }
-#endif
-    return result;
-}
-
-/*
- * Use the hostname as part of the random number seed.
- */
-int
-get_host_seed()
-{
-    int h;
-    char *p = hostname;
-
-    h = 407;
-    for (p = hostname; *p != 0; ++p)
-	h = h * 37 + *p;
-    return h;
-}
-
-/********************************************************************
- *
- * sys_check_options - check the options that the user specified
- */
-
-int
-sys_check_options(void)
-{
-#ifdef IPX_CHANGE
-/*
- * Disable the IPX protocol if the support is not present in the kernel.
- */
-    char *path;
-
-    if (ipxcp_protent.enabled_flag) {
-	struct stat stat_buf;
-        if ((path = path_to_procfs("/net/ipx_interface")) == 0
-	    || lstat(path, &stat_buf) < 0) {
-	    error("IPX support is not present in the kernel\n");
-	    ipxcp_protent.enabled_flag = 0;
-	}
-    }
-#endif
-    if (demand && driver_is_old) {
-	option_error("demand dialling is not supported by kernel driver "
-		     "version %d.%d.%d", driver_version, driver_modification,
-		     driver_patch);
-	return 0;
-    }
-    if (multilink && !new_style_driver) {
-	warn("Warning: multilink is not supported by the kernel driver");
-	multilink = 0;
-    }
-    return 1;
-}