+++ /dev/null
-/*
- * sys-bsd.c - System-dependent procedures for setting up
- * PPP interfaces on bsd-4.4-ish systems (including 386BSD, NetBSD, etc.)
- *
- * Copyright (c) 1993-2002 Paul Mackerras. 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. The name(s) of the authors of this software must not be used to
- * endorse or promote products derived from this software without
- * prior written permission.
- *
- * 3. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by Paul Mackerras
- * <paulus@samba.org>".
- *
- * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
- * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS, IN NO EVENT SHALL THE AUTHORS 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.
- *
- * Derived from main.c and pppd.h, which are:
- *
- * 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
- * tech-transfer@andrew.cmu.edu
- *
- * 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.
- */
-
-#define RCSID "$Id: sys-bsd.c,v 1.50 2004/11/04 10:02:26 paulus Exp $"
-/* $NetBSD: sys-bsd.c,v 1.1.1.3 1997/09/26 18:53:04 christos Exp $ */
-
-/*
- * TODO:
- */
-
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <termios.h>
-#include <signal.h>
-#include <sys/ioctl.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/time.h>
-#include <sys/stat.h>
-#include <sys/param.h>
-#ifdef NetBSD1_2
-#include <util.h>
-#endif
-#ifdef PPP_FILTER
-#include <net/bpf.h>
-#endif
-
-#include <net/if.h>
-#include <net/ppp_defs.h>
-#include <net/if_ppp.h>
-#include <net/route.h>
-#include <net/if_dl.h>
-#include <netinet/in.h>
-
-#if RTM_VERSION >= 3
-#include <sys/param.h>
-#if defined(NetBSD) && (NetBSD >= 199703)
-#include <netinet/if_inarp.h>
-#else /* NetBSD 1.2D or later */
-#ifdef __FreeBSD__
-#include <netinet/if_ether.h>
-#else
-#include <net/if_ether.h>
-#endif
-#endif
-#endif
-
-#include "pppd.h"
-#include "fsm.h"
-#include "ipcp.h"
-
-static const char rcsid[] = RCSID;
-
-static int initdisc = -1; /* Initial TTY discipline for ppp_fd */
-static int initfdflags = -1; /* Initial file descriptor flags for ppp_fd */
-static int ppp_fd = -1; /* fd which is set to PPP discipline */
-static int rtm_seq;
-
-static int restore_term; /* 1 => we've munged the terminal */
-static struct termios inittermios; /* Initial TTY termios */
-static struct winsize wsinfo; /* Initial window size info */
-
-static int loop_slave = -1;
-static int loop_master;
-static char loop_name[20];
-
-static unsigned char inbuf[512]; /* buffer for chars read from loopback */
-
-static int sockfd; /* socket for doing interface ioctls */
-
-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 if_is_up; /* the interface is currently up */
-static u_int32_t ifaddrs[2]; /* local and remote addresses we set */
-static u_int32_t default_route_gateway; /* gateway addr for default route */
-static u_int32_t proxy_arp_addr; /* remote addr for proxy arp */
-
-/* Prototypes for procedures local to this file. */
-static int dodefaultroute __P((u_int32_t, int));
-static int get_ether_addr __P((u_int32_t, struct sockaddr_dl *));
-
-
-/*
- * sys_init - System-dependent initialization.
- */
-void
-sys_init()
-{
- /* Get an internet socket for doing socket ioctl's on. */
- if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
- fatal("Couldn't create IP socket: %m");
-
- 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 should call die() because it's called from die().
- */
-void
-sys_cleanup()
-{
- struct ifreq ifr;
-
- if (if_is_up) {
- strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
- if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0
- && ((ifr.ifr_flags & IFF_UP) != 0)) {
- ifr.ifr_flags &= ~IFF_UP;
- ioctl(sockfd, SIOCSIFFLAGS, &ifr);
- }
- }
- if (ifaddrs[0] != 0)
- cifaddr(0, ifaddrs[0], ifaddrs[1]);
- if (default_route_gateway)
- cifdefaultroute(0, 0, default_route_gateway);
- if (proxy_arp_addr)
- cifproxyarp(0, proxy_arp_addr);
-}
-
-/*
- * sys_close - Clean up in a child process before execing.
- */
-void
-sys_close()
-{
- close(sockfd);
- if (loop_slave >= 0) {
- close(loop_slave);
- close(loop_master);
- }
-}
-
-/*
- * sys_check_options - check the options that the user specified
- */
-int
-sys_check_options()
-{
-#ifndef CDTRCTS
- if (crtscts == 2) {
- warn("DTR/CTS flow control is not supported on this system");
- return 0;
- }
-#endif
- return 1;
-}
-
-/*
- * 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()
-{
- int s, ok;
- struct ifreq ifr;
- extern char *no_ppp_msg;
-
- if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
- return 1; /* can't tell */
-
- strlcpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
- ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
- close(s);
-
- no_ppp_msg = "\
-This system lacks kernel support for PPP. To include PPP support\n\
-in the kernel, please follow the steps detailed in the README.bsd\n\
-file in the ppp-2.2 distribution.\n";
- return ok;
-}
-
-/*
- * establish_ppp - Turn the serial port into a ppp interface.
- */
-int
-establish_ppp(fd)
- int fd;
-{
- int pppdisc = PPPDISC;
- int x;
-
- if (demand) {
- /*
- * Demand mode - prime the old ppp device to relinquish the unit.
- */
- if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0)
- fatal("ioctl(transfer ppp unit): %m");
- }
-
- /*
- * Save the old line discipline of fd, and set it to PPP.
- */
- if (ioctl(fd, TIOCGETD, &initdisc) < 0)
- fatal("ioctl(TIOCGETD): %m");
- if (ioctl(fd, TIOCSETD, &pppdisc) < 0)
- fatal("ioctl(TIOCSETD): %m");
-
- if (!demand) {
- /*
- * Find out which interface we were given.
- */
- if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0)
- fatal("ioctl(PPPIOCGUNIT): %m");
- } else {
- /*
- * Check that we got the same unit again.
- */
- if (ioctl(fd, PPPIOCGUNIT, &x) < 0)
- fatal("ioctl(PPPIOCGUNIT): %m");
- if (x != ifunit)
- fatal("transfer_ppp failed: wanted unit %d, got %d", ifunit, x);
- x = TTYDISC;
- ioctl(loop_slave, TIOCSETD, &x);
- }
-
- ppp_fd = fd;
-
- /*
- * Enable debug in the driver if requested.
- */
- if (kdebugflag) {
- if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
- warn("ioctl (PPPIOCGFLAGS): %m");
- } else {
- x |= (kdebugflag & 0xFF) * SC_DEBUG;
- if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
- warn("ioctl(PPPIOCSFLAGS): %m");
- }
- }
-
- /*
- * Set device for non-blocking reads.
- */
- if ((initfdflags = fcntl(fd, F_GETFL)) == -1
- || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
- warn("Couldn't set device to non-blocking mode: %m");
- }
-
- return fd;
-}
-
-/*
- * restore_loop - reattach the ppp unit to the loopback.
- */
-void
-restore_loop()
-{
- int x;
-
- /*
- * Transfer the ppp interface back to the loopback.
- */
- if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0)
- fatal("ioctl(transfer ppp unit): %m");
- x = PPPDISC;
- if (ioctl(loop_slave, TIOCSETD, &x) < 0)
- fatal("ioctl(TIOCSETD): %m");
-
- /*
- * Check that we got the same unit again.
- */
- if (ioctl(loop_slave, PPPIOCGUNIT, &x) < 0)
- fatal("ioctl(PPPIOCGUNIT): %m");
- if (x != ifunit)
- fatal("transfer_ppp failed: wanted unit %d, got %d", ifunit, x);
- ppp_fd = loop_slave;
-}
-
-
-/*
- * disestablish_ppp - Restore the serial port to normal operation.
- * This shouldn't call die() because it's called from die().
- */
-void
-disestablish_ppp(fd)
- int fd;
-{
- /* Reset non-blocking mode on fd. */
- if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
- warn("Couldn't restore device fd flags: %m");
- initfdflags = -1;
-
- /* Restore old line discipline. */
- if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0)
- error("ioctl(TIOCSETD): %m");
- initdisc = -1;
-
- if (fd == ppp_fd)
- ppp_fd = -1;
-}
-
-/*
- * Check whether the link seems not to be 8-bit clean.
- */
-void
-clean_check()
-{
- int x;
- char *s;
-
- 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 = "bit 7 set to 1";
- break;
- case SC_RCV_B7_1:
- s = "bit 7 set to 0";
- break;
- case SC_RCV_EVNP:
- s = "odd parity";
- break;
- case SC_RCV_ODDP:
- s = "even parity";
- break;
- }
- if (s != NULL) {
- warn("Serial link is not 8-bit clean:");
- warn("All received characters had %s", s);
- }
- }
-}
-
-/*
- * 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.
- *
- * For *BSD, we assume that speed_t values numerically equal bits/second.
- */
-void
-set_up_tty(fd, local)
- int fd, local;
-{
- struct termios tios;
-
- if (tcgetattr(fd, &tios) < 0)
- fatal("tcgetattr: %m");
-
- if (!restore_term) {
- inittermios = tios;
- ioctl(fd, TIOCGWINSZ, &wsinfo);
- }
-
- tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
- if (crtscts > 0 && !local) {
- if (crtscts == 2) {
-#ifdef CDTRCTS
- tios.c_cflag |= CDTRCTS;
-#endif
- } else
- tios.c_cflag |= CRTSCTS;
- } else if (crtscts < 0) {
- tios.c_cflag &= ~CRTSCTS;
-#ifdef CDTRCTS
- tios.c_cflag &= ~CDTRCTS;
-#endif
- }
-
- tios.c_cflag |= CS8 | CREAD | HUPCL;
- if (local || !modem)
- tios.c_cflag |= CLOCAL;
- tios.c_iflag = IGNBRK | IGNPAR;
- tios.c_oflag = 0;
- tios.c_lflag = 0;
- tios.c_cc[VMIN] = 1;
- tios.c_cc[VTIME] = 0;
-
- if (crtscts == -2) {
- tios.c_iflag |= IXON | IXOFF;
- tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
- tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
- }
-
- if (inspeed) {
- cfsetospeed(&tios, inspeed);
- cfsetispeed(&tios, inspeed);
- } else {
- inspeed = cfgetospeed(&tios);
- /*
- * We can't proceed if the serial port speed is 0,
- * since that implies that the serial port is disabled.
- */
- if (inspeed == 0)
- fatal("Baud rate for %s is 0; need explicit baud rate", devnam);
- }
- baud_rate = inspeed;
-
- if (tcsetattr(fd, TCSAFLUSH, &tios) < 0)
- fatal("tcsetattr: %m");
-
- restore_term = 1;
-}
-
-/*
- * restore_tty - restore the terminal to the saved settings.
- */
-void
-restore_tty(fd)
- int fd;
-{
- if (restore_term) {
- if (!default_device) {
- /*
- * 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.
- */
- inittermios.c_lflag &= ~(ECHO | ECHONL);
- }
- if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
- if (errno != ENXIO)
- warn("tcsetattr: %m");
- ioctl(fd, TIOCSWINSZ, &wsinfo);
- restore_term = 0;
- }
-}
-
-/*
- * setdtr - control the DTR line on the serial port.
- * This is called from die(), so it shouldn't call die().
- */
-void
-setdtr(fd, on)
-int fd, on;
-{
- int modembits = TIOCM_DTR;
-
- ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
-}
-
-/*
- * get_pty - get a pty master/slave pair and chown the slave side
- * to the uid given. Assumes slave_name points to >= 12 bytes of space.
- */
-int
-get_pty(master_fdp, slave_fdp, slave_name, uid)
- int *master_fdp;
- int *slave_fdp;
- char *slave_name;
- int uid;
-{
- struct termios tios;
-
- if (openpty(master_fdp, slave_fdp, slave_name, NULL, NULL) < 0)
- return 0;
-
- fchown(*slave_fdp, uid, -1);
- fchmod(*slave_fdp, S_IRUSR | S_IWUSR);
- if (tcgetattr(*slave_fdp, &tios) == 0) {
- tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
- tios.c_cflag |= CS8 | CREAD;
- tios.c_iflag = IGNPAR | CLOCAL;
- tios.c_oflag = 0;
- tios.c_lflag = 0;
- if (tcsetattr(*slave_fdp, TCSAFLUSH, &tios) < 0)
- warn("couldn't set attributes on pty: %m");
- } else
- warn("couldn't get attributes on pty: %m");
-
- return 1;
-}
-
-
-/*
- * open_ppp_loopback - open the device we use for getting
- * packets in demand mode, and connect it to a ppp interface.
- * Here we use a pty.
- */
-int
-open_ppp_loopback()
-{
- int flags;
- struct termios tios;
- int pppdisc = PPPDISC;
-
- if (openpty(&loop_master, &loop_slave, loop_name, NULL, NULL) < 0)
- fatal("No free pty for loopback");
- SYSDEBUG(("using %s for loopback", loop_name));
-
- if (tcgetattr(loop_slave, &tios) == 0) {
- tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
- tios.c_cflag |= CS8 | CREAD;
- tios.c_iflag = IGNPAR;
- tios.c_oflag = 0;
- tios.c_lflag = 0;
- if (tcsetattr(loop_slave, TCSAFLUSH, &tios) < 0)
- warn("couldn't set attributes on loopback: %m");
- }
-
- if ((flags = fcntl(loop_master, F_GETFL)) != -1)
- if (fcntl(loop_master, F_SETFL, flags | O_NONBLOCK) == -1)
- warn("couldn't set loopback to nonblock: %m");
-
- ppp_fd = loop_slave;
- if (ioctl(ppp_fd, TIOCSETD, &pppdisc) < 0)
- fatal("ioctl(TIOCSETD): %m");
-
- /*
- * Find out which interface we were given.
- */
- if (ioctl(ppp_fd, PPPIOCGUNIT, &ifunit) < 0)
- fatal("ioctl(PPPIOCGUNIT): %m");
-
- /*
- * Enable debug in the driver if requested.
- */
- if (kdebugflag) {
- if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) {
- warn("ioctl (PPPIOCGFLAGS): %m");
- } else {
- flags |= (kdebugflag & 0xFF) * SC_DEBUG;
- if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &flags) < 0)
- warn("ioctl(PPPIOCSFLAGS): %m");
- }
- }
-
- return loop_master;
-}
-
-
-/*
- * output - Output PPP packet.
- */
-void
-output(unit, p, len)
- int unit;
- u_char *p;
- int len;
-{
- if (debug)
- dbglog("sent %P", p, len);
-
- if (write(ttyfd, p, len) < 0) {
- if (errno != EIO)
- error("write: %m");
- }
-}
-
-
-/*
- * wait_input - wait until there is data available,
- * for the length of time specified by *timo (indefinite
- * if timo is NULL).
- */
-void
-wait_input(timo)
- struct timeval *timo;
-{
- fd_set ready;
- int n;
-
- ready = in_fds;
- n = select(max_in_fd + 1, &ready, NULL, &ready, timo);
- if (n < 0 && errno != EINTR)
- fatal("select: %m");
-}
-
-
-/*
- * add_fd - add an fd to the set that wait_input waits for.
- */
-void add_fd(fd)
- int fd;
-{
- if (fd >= FD_SETSIZE)
- fatal("internal error: file descriptor too large (%d)", 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(fd)
- int fd;
-{
- FD_CLR(fd, &in_fds);
-}
-
-#if 0
-/*
- * wait_loop_output - wait until there is data available on the
- * loopback, for the length of time specified by *timo (indefinite
- * if timo is NULL).
- */
-void
-wait_loop_output(timo)
- struct timeval *timo;
-{
- fd_set ready;
- int n;
-
- FD_ZERO(&ready);
- if (loop_master >= FD_SETSIZE)
- fatal("internal error: file descriptor too large (%d)", loop_master);
- FD_SET(loop_master, &ready);
- n = select(loop_master + 1, &ready, NULL, &ready, timo);
- if (n < 0 && errno != EINTR)
- fatal("select: %m");
-}
-
-
-/*
- * wait_time - wait for a given length of time or until a
- * signal is received.
- */
-void
-wait_time(timo)
- struct timeval *timo;
-{
- int n;
-
- n = select(0, NULL, NULL, NULL, timo);
- if (n < 0 && errno != EINTR)
- fatal("select: %m");
-}
-#endif
-
-
-/*
- * read_packet - get a PPP packet from the serial device.
- */
-int
-read_packet(buf)
- u_char *buf;
-{
- int len;
-
- if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
- if (errno == EWOULDBLOCK || errno == EINTR)
- return -1;
- fatal("read: %m");
- }
- return len;
-}
-
-
-/*
- * get_loop_output - read characters from the loopback, form them
- * into frames, 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()
-{
- int rv = 0;
- int n;
-
- while ((n = read(loop_master, 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");
-
- return rv;
-}
-
-
-/*
- * ppp_send_config - configure the transmit characteristics of
- * the ppp interface.
- */
-void
-ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
- int unit, mtu;
- u_int32_t asyncmap;
- int pcomp, accomp;
-{
- u_int x;
- struct ifreq ifr;
-
- strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
- ifr.ifr_mtu = mtu;
- if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0)
- fatal("ioctl(SIOCSIFMTU): %m");
-
- if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0)
- fatal("ioctl(PPPIOCSASYNCMAP): %m");
-
- if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
- fatal("ioctl (PPPIOCGFLAGS): %m");
- 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;
- if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
- fatal("ioctl(PPPIOCSFLAGS): %m");
-}
-
-
-/*
- * ppp_set_xaccm - set the extended transmit ACCM for the interface.
- */
-void
-ppp_set_xaccm(unit, accm)
- int unit;
- ext_accm accm;
-{
- if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
- warn("ioctl(set extended ACCM): %m");
-}
-
-
-/*
- * ppp_recv_config - configure the receive-side characteristics of
- * the ppp interface.
- */
-void
-ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
- int unit, mru;
- u_int32_t asyncmap;
- int pcomp, accomp;
-{
- int x;
-
- if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0)
- fatal("ioctl(PPPIOCSMRU): %m");
- if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0)
- fatal("ioctl(PPPIOCSRASYNCMAP): %m");
- if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
- fatal("ioctl (PPPIOCGFLAGS): %m");
- x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
- if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
- fatal("ioctl(PPPIOCSFLAGS): %m");
-}
-
-/*
- * ccp_test - ask kernel whether a given compression method
- * is acceptable for use. Returns 1 if the method and parameters
- * are OK, 0 if the method is known but the parameters are not OK
- * (e.g. code size should be reduced), or -1 if the method is unknown.
- */
-int
-ccp_test(unit, opt_ptr, opt_len, for_transmit)
- int unit, opt_len, for_transmit;
- u_char *opt_ptr;
-{
- struct ppp_option_data data;
-
- data.ptr = opt_ptr;
- data.length = opt_len;
- data.transmit = for_transmit;
- if (ioctl(ttyfd, 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(unit, isopen, isup)
- int unit, isopen, isup;
-{
- int x;
-
- if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
- error("ioctl (PPPIOCGFLAGS): %m");
- return;
- }
- x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN;
- x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP;
- if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
- error("ioctl(PPPIOCSFLAGS): %m");
-}
-
-/*
- * 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(unit)
- int unit;
-{
- int x;
-
- if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
- error("ioctl(PPPIOCGFLAGS): %m");
- return 0;
- }
- return x & SC_DC_FERROR;
-}
-
-/*
- * 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_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));
- strlcpy(req.ifr_name, ifname, sizeof(req.ifr_name));
- if (ioctl(sockfd, 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;
-}
-
-
-#ifdef PPP_FILTER
-/*
- * set_filters - transfer the pass and active filters to the kernel.
- */
-int
-set_filters(pass, active)
- struct bpf_program *pass, *active;
-{
- int ret = 1;
-
- if (pass->bf_len > 0) {
- if (ioctl(ppp_fd, PPPIOCSPASS, pass) < 0) {
- error("Couldn't set pass-filter in kernel: %m");
- ret = 0;
- }
- }
- if (active->bf_len > 0) {
- if (ioctl(ppp_fd, PPPIOCSACTIVE, active) < 0) {
- error("Couldn't set active-filter in kernel: %m");
- ret = 0;
- }
- }
- return ret;
-}
-#endif
-
-/*
- * sifvjcomp - config tcp header compression
- */
-int
-sifvjcomp(u, vjcomp, cidcomp, maxcid)
- int u, vjcomp, cidcomp, maxcid;
-{
- u_int x;
-
- if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
- error("ioctl (PPPIOCGFLAGS): %m");
- return 0;
- }
- x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
- x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
- if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
- error("ioctl(PPPIOCSFLAGS): %m");
- return 0;
- }
- if (vjcomp && ioctl(ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
- error("ioctl(PPPIOCSFLAGS): %m");
- return 0;
- }
- return 1;
-}
-
-/*
- * sifup - Config the interface up and enable IP packets to pass.
- */
-int
-sifup(u)
- int u;
-{
- struct ifreq ifr;
-
- strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
- if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
- error("ioctl (SIOCGIFFLAGS): %m");
- return 0;
- }
- ifr.ifr_flags |= IFF_UP;
- if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
- error("ioctl(SIOCSIFFLAGS): %m");
- return 0;
- }
- if_is_up = 1;
- return 1;
-}
-
-/*
- * 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_fd, PPPIOCSNPMODE, &npi) < 0) {
- error("ioctl(set NP %d mode to %d): %m", proto, mode);
- return 0;
- }
- return 1;
-}
-
-/*
- * sifdown - Config the interface down and disable IP.
- */
-int
-sifdown(u)
- int u;
-{
- struct ifreq ifr;
- int rv;
- struct npioctl npi;
-
- rv = 1;
- npi.protocol = PPP_IP;
- npi.mode = NPMODE_ERROR;
- ioctl(ppp_fd, PPPIOCSNPMODE, (caddr_t) &npi);
- /* ignore errors, because ppp_fd might have been closed by now. */
-
- strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
- if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
- error("ioctl (SIOCGIFFLAGS): %m");
- rv = 0;
- } else {
- ifr.ifr_flags &= ~IFF_UP;
- if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
- error("ioctl(SIOCSIFFLAGS): %m");
- rv = 0;
- } else
- if_is_up = 0;
- }
- return rv;
-}
-
-/*
- * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
- * if it exists.
- */
-#define SET_SA_FAMILY(addr, family) \
- BZERO((char *) &(addr), sizeof(addr)); \
- addr.sa_family = (family); \
- addr.sa_len = sizeof(addr);
-
-/*
- * sifaddr - Config the interface IP addresses and netmask.
- */
-int
-sifaddr(u, o, h, m)
- int u;
- u_int32_t o, h, m;
-{
- struct ifaliasreq ifra;
- struct ifreq ifr;
-
- strlcpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name));
- SET_SA_FAMILY(ifra.ifra_addr, AF_INET);
- ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o;
- SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET);
- ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h;
- if (m != 0) {
- SET_SA_FAMILY(ifra.ifra_mask, AF_INET);
- ((struct sockaddr_in *) &ifra.ifra_mask)->sin_addr.s_addr = m;
- } else
- BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask));
- BZERO(&ifr, sizeof(ifr));
- strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
- if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifr) < 0) {
- if (errno != EADDRNOTAVAIL)
- warn("Couldn't remove interface address: %m");
- }
- if (ioctl(sockfd, SIOCAIFADDR, (caddr_t) &ifra) < 0) {
- if (errno != EEXIST) {
- error("Couldn't set interface address: %m");
- return 0;
- }
- warn("Couldn't set interface address: Address %I already exists", o);
- }
- ifaddrs[0] = o;
- ifaddrs[1] = h;
- return 1;
-}
-
-/*
- * cifaddr - Clear the interface IP addresses, and delete routes
- * through the interface if possible.
- */
-int
-cifaddr(u, o, h)
- int u;
- u_int32_t o, h;
-{
- struct ifaliasreq ifra;
-
- ifaddrs[0] = 0;
- strlcpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name));
- SET_SA_FAMILY(ifra.ifra_addr, AF_INET);
- ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o;
- SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET);
- ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h;
- BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask));
- if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifra) < 0) {
- if (errno != EADDRNOTAVAIL)
- warn("Couldn't delete interface address: %m");
- return 0;
- }
- return 1;
-}
-
-/*
- * sifdefaultroute - assign a default route through the address given.
- */
-int
-sifdefaultroute(u, l, g)
- int u;
- u_int32_t l, g;
-{
- return dodefaultroute(g, 's');
-}
-
-/*
- * cifdefaultroute - delete a default route through the address given.
- */
-int
-cifdefaultroute(u, l, g)
- int u;
- u_int32_t l, g;
-{
- return dodefaultroute(g, 'c');
-}
-
-/*
- * dodefaultroute - talk to a routing socket to add/delete a default route.
- */
-static int
-dodefaultroute(g, cmd)
- u_int32_t g;
- int cmd;
-{
- int routes;
- struct {
- struct rt_msghdr hdr;
- struct sockaddr_in dst;
- struct sockaddr_in gway;
- struct sockaddr_in mask;
- } rtmsg;
-
- if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
- error("Couldn't %s default route: socket: %m",
- cmd=='s'? "add": "delete");
- return 0;
- }
-
- memset(&rtmsg, 0, sizeof(rtmsg));
- rtmsg.hdr.rtm_type = cmd == 's'? RTM_ADD: RTM_DELETE;
- rtmsg.hdr.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC;
- rtmsg.hdr.rtm_version = RTM_VERSION;
- rtmsg.hdr.rtm_seq = ++rtm_seq;
- rtmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK;
- rtmsg.dst.sin_len = sizeof(rtmsg.dst);
- rtmsg.dst.sin_family = AF_INET;
- rtmsg.gway.sin_len = sizeof(rtmsg.gway);
- rtmsg.gway.sin_family = AF_INET;
- rtmsg.gway.sin_addr.s_addr = g;
- rtmsg.mask.sin_len = sizeof(rtmsg.dst);
- rtmsg.mask.sin_family = AF_INET;
-
- rtmsg.hdr.rtm_msglen = sizeof(rtmsg);
- if (write(routes, &rtmsg, sizeof(rtmsg)) < 0) {
- error("Couldn't %s default route: %m",
- cmd=='s'? "add": "delete");
- close(routes);
- return 0;
- }
-
- close(routes);
- default_route_gateway = (cmd == 's')? g: 0;
- return 1;
-}
-
-#if RTM_VERSION >= 3
-
-/*
- * sifproxyarp - Make a proxy ARP entry for the peer.
- */
-static struct {
- struct rt_msghdr hdr;
- struct sockaddr_inarp dst;
- struct sockaddr_dl hwa;
- char extra[128];
-} arpmsg;
-
-static int arpmsg_valid;
-
-int
-sifproxyarp(unit, hisaddr)
- int unit;
- u_int32_t hisaddr;
-{
- int routes;
-
- /*
- * Get the hardware address of an interface on the same subnet
- * as our local address.
- */
- memset(&arpmsg, 0, sizeof(arpmsg));
- if (!get_ether_addr(hisaddr, &arpmsg.hwa)) {
- error("Cannot determine ethernet address for proxy ARP");
- return 0;
- }
-
- if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
- error("Couldn't add proxy arp entry: socket: %m");
- return 0;
- }
-
- arpmsg.hdr.rtm_type = RTM_ADD;
- arpmsg.hdr.rtm_flags = RTF_ANNOUNCE | RTF_HOST | RTF_STATIC;
- arpmsg.hdr.rtm_version = RTM_VERSION;
- arpmsg.hdr.rtm_seq = ++rtm_seq;
- arpmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY;
- arpmsg.hdr.rtm_inits = RTV_EXPIRE;
- arpmsg.dst.sin_len = sizeof(struct sockaddr_inarp);
- arpmsg.dst.sin_family = AF_INET;
- arpmsg.dst.sin_addr.s_addr = hisaddr;
- arpmsg.dst.sin_other = SIN_PROXY;
-
- arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg
- + arpmsg.hwa.sdl_len;
- if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
- error("Couldn't add proxy arp entry: %m");
- close(routes);
- return 0;
- }
-
- close(routes);
- arpmsg_valid = 1;
- proxy_arp_addr = hisaddr;
- return 1;
-}
-
-/*
- * cifproxyarp - Delete the proxy ARP entry for the peer.
- */
-int
-cifproxyarp(unit, hisaddr)
- int unit;
- u_int32_t hisaddr;
-{
- int routes;
-
- if (!arpmsg_valid)
- return 0;
- arpmsg_valid = 0;
-
- arpmsg.hdr.rtm_type = RTM_DELETE;
- arpmsg.hdr.rtm_seq = ++rtm_seq;
-
- if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
- error("Couldn't delete proxy arp entry: socket: %m");
- return 0;
- }
-
- if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
- error("Couldn't delete proxy arp entry: %m");
- close(routes);
- return 0;
- }
-
- close(routes);
- proxy_arp_addr = 0;
- return 1;
-}
-
-#else /* RTM_VERSION */
-
-/*
- * sifproxyarp - Make a proxy ARP entry for the peer.
- */
-int
-sifproxyarp(unit, hisaddr)
- int unit;
- u_int32_t hisaddr;
-{
- struct arpreq arpreq;
- struct {
- struct sockaddr_dl sdl;
- char space[128];
- } dls;
-
- BZERO(&arpreq, sizeof(arpreq));
-
- /*
- * Get the hardware address of an interface on the same subnet
- * as our local address.
- */
- if (!get_ether_addr(hisaddr, &dls.sdl)) {
- error("Cannot determine ethernet address for proxy ARP");
- return 0;
- }
-
- arpreq.arp_ha.sa_len = sizeof(struct sockaddr);
- arpreq.arp_ha.sa_family = AF_UNSPEC;
- BCOPY(LLADDR(&dls.sdl), arpreq.arp_ha.sa_data, dls.sdl.sdl_alen);
- SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
- ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
- arpreq.arp_flags = ATF_PERM | ATF_PUBL;
- if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
- error("Couldn't add proxy arp entry: %m");
- return 0;
- }
-
- proxy_arp_addr = hisaddr;
- return 1;
-}
-
-/*
- * cifproxyarp - Delete the proxy ARP entry for the peer.
- */
-int
-cifproxyarp(unit, hisaddr)
- int unit;
- u_int32_t hisaddr;
-{
- struct arpreq arpreq;
-
- BZERO(&arpreq, sizeof(arpreq));
- SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
- ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
- if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
- warn("Couldn't delete proxy arp entry: %m");
- return 0;
- }
- proxy_arp_addr = 0;
- return 1;
-}
-#endif /* RTM_VERSION */
-
-
-/*
- * get_ether_addr - get the hardware address of an interface on the
- * the same subnet as ipaddr.
- */
-#define MAX_IFS 32
-
-static int
-get_ether_addr(ipaddr, hwaddr)
- u_int32_t ipaddr;
- struct sockaddr_dl *hwaddr;
-{
- struct ifreq *ifr, *ifend, *ifp;
- u_int32_t ina, mask;
- struct sockaddr_dl *dla;
- struct ifreq ifreq;
- struct ifconf ifc;
- struct ifreq ifs[MAX_IFS];
-
- ifc.ifc_len = sizeof(ifs);
- ifc.ifc_req = ifs;
- if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
- error("ioctl(SIOCGIFCONF): %m");
- return 0;
- }
-
- /*
- * Scan through looking for an interface with an Internet
- * address on the same subnet as `ipaddr'.
- */
- ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
- for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
- ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len)) {
- if (ifr->ifr_addr.sa_family == AF_INET) {
- ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
- strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
- /*
- * Check that the interface is up, and not point-to-point
- * or loopback.
- */
- if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
- continue;
- if ((ifreq.ifr_flags &
- (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
- != (IFF_UP|IFF_BROADCAST))
- continue;
- /*
- * Get its netmask and check that it's on the right subnet.
- */
- if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
- continue;
- mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
- if ((ipaddr & mask) != (ina & mask))
- continue;
-
- break;
- }
- }
-
- if (ifr >= ifend)
- return 0;
- info("found interface %s for proxy arp", ifr->ifr_name);
-
- /*
- * Now scan through again looking for a link-level address
- * for this interface.
- */
- ifp = ifr;
- for (ifr = ifc.ifc_req; ifr < ifend; ) {
- if (strcmp(ifp->ifr_name, ifr->ifr_name) == 0
- && ifr->ifr_addr.sa_family == AF_LINK) {
- /*
- * Found the link-level address - copy it out
- */
- dla = (struct sockaddr_dl *) &ifr->ifr_addr;
- BCOPY(dla, hwaddr, dla->sdl_len);
- return 1;
- }
- ifr = (struct ifreq *) ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len);
- }
-
- return 0;
-}
-
-/*
- * 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(addr)
- 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(sockfd, SIOCGIFCONF, &ifc) < 0) {
- warn("ioctl(SIOCGIFCONF): %m");
- return mask;
- }
- ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
- for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
- ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len)) {
- /*
- * Check the interface's internet address.
- */
- if (ifr->ifr_addr.sa_family != AF_INET)
- continue;
- ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
- if ((ntohl(ina) & nmask) != (addr & nmask))
- continue;
- /*
- * Check that the interface is up, and not point-to-point or loopback.
- */
- strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
- if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
- continue;
- if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
- != IFF_UP)
- continue;
- /*
- * Get its netmask and OR it into our mask.
- */
- if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
- continue;
- mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
- }
-
- return mask;
-}
-
-/*
- * have_route_to - determine if the system has any route to
- * a given IP address.
- * For demand mode to work properly, we have to ignore routes
- * through our own interface.
- */
-int have_route_to(u_int32_t addr)
-{
- return -1;
-}
-
-/*
- * Use the hostid as part of the random number seed.
- */
-int
-get_host_seed()
-{
- return gethostid();
-}
-
-#if 0
-/*
- * lock - create a lock file for the named lock device
- */
-#define LOCK_PREFIX "/var/spool/lock/LCK.."
-
-static char *lock_file; /* name of lock file created */
-
-int
-lock(dev)
- char *dev;
-{
- char hdb_lock_buffer[12];
- int fd, pid, n;
- char *p;
- size_t l;
-
- if ((p = strrchr(dev, '/')) != NULL)
- dev = p + 1;
- l = strlen(LOCK_PREFIX) + strlen(dev) + 1;
- lock_file = malloc(l);
- if (lock_file == NULL)
- novm("lock file name");
- slprintf(lock_file, l, "%s%s", LOCK_PREFIX, dev);
-
- while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
- if (errno == EEXIST
- && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
- /* Read the lock file to find out who has the device locked */
- n = read(fd, hdb_lock_buffer, 11);
- if (n <= 0) {
- error("Can't read pid from lock file %s", lock_file);
- close(fd);
- } else {
- hdb_lock_buffer[n] = 0;
- pid = atoi(hdb_lock_buffer);
- if (kill(pid, 0) == -1 && errno == ESRCH) {
- /* pid no longer exists - remove the lock file */
- if (unlink(lock_file) == 0) {
- close(fd);
- notice("Removed stale lock on %s (pid %d)",
- dev, pid);
- continue;
- } else
- warn("Couldn't remove stale lock on %s",
- dev);
- } else
- notice("Device %s is locked by pid %d",
- dev, pid);
- }
- close(fd);
- } else
- error("Can't create lock file %s: %m", lock_file);
- free(lock_file);
- lock_file = NULL;
- return -1;
- }
-
- slprintf(hdb_lock_buffer, sizeof(hdb_lock_buffer), "%10d\n", getpid());
- write(fd, hdb_lock_buffer, 11);
-
- close(fd);
- return 0;
-}
-
-/*
- * unlock - remove our lockfile
- */
-void
-unlock()
-{
- if (lock_file) {
- unlink(lock_file);
- free(lock_file);
- lock_file = NULL;
- }
-}
-#endif
projects / ppp.git / blobdiff