mirror of
https://git.FreeBSD.org/src.git
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1138 lines
27 KiB
C
1138 lines
27 KiB
C
/*
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* sys-bsd.c - System-dependent procedures for setting up
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* PPP interfaces on bsd-4.4-ish systems (including 386BSD, NetBSD, etc.)
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*
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* Copyright (c) 1989 Carnegie Mellon University.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by Carnegie Mellon University. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#ifndef lint
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static char rcsid[] = "$Id$";
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#endif
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/*
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* TODO:
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*/
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#include <stdio.h>
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#include <syslog.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <termios.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/ppp_defs.h>
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#include <net/if_ppp.h>
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#include <net/route.h>
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#include <net/if_dl.h>
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#include <netinet/in.h>
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#if RTM_VERSION >= 3
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#include <netinet/if_ether.h>
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#endif
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#include "pppd.h"
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static int initdisc = -1; /* Initial TTY discipline */
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static int rtm_seq;
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static int restore_term; /* 1 => we've munged the terminal */
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static struct termios inittermios; /* Initial TTY termios */
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static struct winsize wsinfo; /* Initial window size info */
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static char *lock_file; /* name of lock file created */
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int sockfd; /* socket for doing interface ioctls */
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/*
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* sys_init - System-dependent initialization.
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*/
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void
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sys_init()
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{
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openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
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setlogmask(LOG_UPTO(LOG_INFO));
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if (debug)
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setlogmask(LOG_UPTO(LOG_DEBUG));
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/* Get an internet socket for doing socket ioctl's on. */
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if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
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syslog(LOG_ERR, "Couldn't create IP socket: %m");
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die(1);
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}
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}
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/*
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* note_debug_level - note a change in the debug level.
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*/
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void
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note_debug_level()
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{
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if (debug) {
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syslog(LOG_INFO, "Debug turned ON, Level %d", debug);
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setlogmask(LOG_UPTO(LOG_DEBUG));
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} else {
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setlogmask(LOG_UPTO(LOG_WARNING));
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}
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}
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/*
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* ppp_available - check whether the system has any ppp interfaces
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* (in fact we check whether we can do an ioctl on ppp0).
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*/
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int
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ppp_available()
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{
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int s, ok;
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struct ifreq ifr;
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extern char *no_ppp_msg;
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if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
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return 1; /* can't tell */
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strncpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
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ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
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close(s);
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no_ppp_msg = "\
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This system lacks kernel support for PPP. To include PPP support\n\
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in the kernel, please follow the steps detailed in the README.bsd\n\
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file in the ppp-2.2 distribution.\n";
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return ok;
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}
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/*
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* establish_ppp - Turn the serial port into a ppp interface.
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*/
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void
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establish_ppp()
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{
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int pppdisc = PPPDISC;
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int x;
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if (ioctl(fd, TIOCGETD, &initdisc) < 0) {
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syslog(LOG_ERR, "ioctl(TIOCGETD): %m");
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die(1);
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}
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if (ioctl(fd, TIOCSETD, &pppdisc) < 0) {
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syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
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die(1);
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}
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/*
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* Find out which interface we were given.
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*/
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if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0) {
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syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
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die(1);
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}
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/*
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* Enable debug in the driver if requested.
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*/
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if (kdebugflag) {
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if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
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syslog(LOG_WARNING, "ioctl (PPPIOCGFLAGS): %m");
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} else {
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x |= (kdebugflag & 0xFF) * SC_DEBUG;
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if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
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syslog(LOG_WARNING, "ioctl(PPPIOCSFLAGS): %m");
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}
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}
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}
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/*
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* disestablish_ppp - Restore the serial port to normal operation.
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* This shouldn't call die() because it's called from die().
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*/
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void
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disestablish_ppp()
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{
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int x;
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char *s;
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if (initdisc >= 0) {
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/*
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* Check whether the link seems not to be 8-bit clean.
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*/
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if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
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s = NULL;
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switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
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case SC_RCV_B7_0:
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s = "bit 7 set to 1";
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break;
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case SC_RCV_B7_1:
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s = "bit 7 set to 0";
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break;
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case SC_RCV_EVNP:
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s = "odd parity";
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break;
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case SC_RCV_ODDP:
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s = "even parity";
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break;
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}
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if (s != NULL) {
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syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
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syslog(LOG_WARNING, "All received characters had %s", s);
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}
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}
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if (ioctl(fd, TIOCSETD, &initdisc) < 0)
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syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
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}
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}
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/*
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* set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
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* at the requested speed, etc. If `local' is true, set CLOCAL
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* regardless of whether the modem option was specified.
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*
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* For *BSD, we assume that speed_t values numerically equal bits/second.
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*/
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set_up_tty(fd, local)
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int fd, local;
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{
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struct termios tios;
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if (tcgetattr(fd, &tios) < 0) {
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syslog(LOG_ERR, "tcgetattr: %m");
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die(1);
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}
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if (!restore_term) {
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inittermios = tios;
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ioctl(fd, TIOCGWINSZ, &wsinfo);
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}
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tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
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if (crtscts > 0)
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tios.c_cflag |= CRTSCTS;
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else if (crtscts < 0)
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tios.c_cflag &= ~CRTSCTS;
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tios.c_cflag |= CS8 | CREAD | HUPCL;
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if (local || !modem)
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tios.c_cflag |= CLOCAL;
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tios.c_iflag = IGNBRK | IGNPAR;
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tios.c_oflag = 0;
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tios.c_lflag = 0;
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tios.c_cc[VMIN] = 1;
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tios.c_cc[VTIME] = 0;
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if (crtscts == 2) {
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tios.c_iflag |= IXOFF;
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tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
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tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
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}
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if (inspeed) {
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cfsetospeed(&tios, inspeed);
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cfsetispeed(&tios, inspeed);
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} else {
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inspeed = cfgetospeed(&tios);
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/*
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* We can't proceed if the serial port speed is 0,
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* since that implies that the serial port is disabled.
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*/
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if (inspeed == 0) {
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syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
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devnam);
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die(1);
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}
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}
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baud_rate = inspeed;
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if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
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syslog(LOG_ERR, "tcsetattr: %m");
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die(1);
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}
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restore_term = 1;
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}
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/*
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* restore_tty - restore the terminal to the saved settings.
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*/
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void
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restore_tty()
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{
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if (restore_term) {
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if (!default_device) {
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/*
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* Turn off echoing, because otherwise we can get into
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* a loop with the tty and the modem echoing to each other.
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* We presume we are the sole user of this tty device, so
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* when we close it, it will revert to its defaults anyway.
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*/
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inittermios.c_lflag &= ~(ECHO | ECHONL);
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}
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if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
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if (errno != ENXIO)
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syslog(LOG_WARNING, "tcsetattr: %m");
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ioctl(fd, TIOCSWINSZ, &wsinfo);
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restore_term = 0;
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}
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}
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/*
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* setdtr - control the DTR line on the serial port.
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* This is called from die(), so it shouldn't call die().
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*/
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setdtr(fd, on)
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int fd, on;
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{
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int modembits = TIOCM_DTR;
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ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
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}
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/*
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* output - Output PPP packet.
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*/
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void
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output(unit, p, len)
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int unit;
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u_char *p;
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int len;
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{
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if (unit != 0)
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MAINDEBUG((LOG_WARNING, "output: unit != 0!"));
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if (debug)
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log_packet(p, len, "sent ");
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if (write(fd, p, len) < 0) {
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syslog(LOG_ERR, "write: %m");
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die(1);
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}
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}
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/*
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* wait_input - wait until there is data available on fd,
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* for the length of time specified by *timo (indefinite
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* if timo is NULL).
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*/
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wait_input(timo)
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struct timeval *timo;
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{
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fd_set ready;
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int n;
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FD_ZERO(&ready);
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FD_SET(fd, &ready);
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n = select(fd+1, &ready, NULL, &ready, timo);
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if (n < 0 && errno != EINTR) {
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syslog(LOG_ERR, "select: %m");
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die(1);
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}
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}
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/*
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* read_packet - get a PPP packet from the serial device.
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*/
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int
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read_packet(buf)
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u_char *buf;
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{
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int len;
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if ((len = read(fd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
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if (errno == EWOULDBLOCK || errno == EINTR)
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return -1;
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syslog(LOG_ERR, "read(fd): %m");
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die(1);
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}
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return len;
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}
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/*
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* ppp_send_config - configure the transmit characteristics of
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* the ppp interface.
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*/
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void
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ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
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int unit, mtu;
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u_int32_t asyncmap;
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int pcomp, accomp;
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{
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u_int x;
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struct ifreq ifr;
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strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
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ifr.ifr_mtu = mtu;
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if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0) {
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syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m");
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quit();
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}
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if (ioctl(fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) {
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syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP): %m");
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quit();
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}
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if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
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syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
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quit();
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}
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x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT;
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x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC;
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if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
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syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
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quit();
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}
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}
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/*
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* ppp_set_xaccm - set the extended transmit ACCM for the interface.
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*/
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void
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ppp_set_xaccm(unit, accm)
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int unit;
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ext_accm accm;
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{
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if (ioctl(fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
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syslog(LOG_WARNING, "ioctl(set extended ACCM): %m");
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}
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/*
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* ppp_recv_config - configure the receive-side characteristics of
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* the ppp interface.
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*/
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void
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ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
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int unit, mru;
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u_int32_t asyncmap;
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int pcomp, accomp;
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{
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int x;
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if (ioctl(fd, PPPIOCSMRU, (caddr_t) &mru) < 0) {
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syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m");
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quit();
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}
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if (ioctl(fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) {
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syslog(LOG_ERR, "ioctl(PPPIOCSRASYNCMAP): %m");
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quit();
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}
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if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
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syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
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quit();
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}
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x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
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if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
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syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
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quit();
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}
|
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}
|
|
|
|
/*
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* ccp_test - ask kernel whether a given compression method
|
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* is acceptable for use.
|
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*/
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ccp_test(unit, opt_ptr, opt_len, for_transmit)
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int unit, opt_len, for_transmit;
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u_char *opt_ptr;
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{
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struct ppp_option_data data;
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data.ptr = opt_ptr;
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data.length = opt_len;
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data.transmit = for_transmit;
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return ioctl(fd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0;
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}
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|
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/*
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* ccp_flags_set - inform kernel about the current state of CCP.
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*/
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void
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ccp_flags_set(unit, isopen, isup)
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int unit, isopen, isup;
|
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{
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int x;
|
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if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
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syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
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return;
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}
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x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN;
|
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x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP;
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if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
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syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
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}
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|
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/*
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* ccp_fatal_error - returns 1 if decompression was disabled as a
|
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* result of an error detected after decompression of a packet,
|
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* 0 otherwise. This is necessary because of patent nonsense.
|
|
*/
|
|
int
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ccp_fatal_error(unit)
|
|
int unit;
|
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{
|
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int x;
|
|
|
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if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
|
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syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m");
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return 0;
|
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}
|
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return x & SC_DC_FERROR;
|
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}
|
|
|
|
/*
|
|
* sifvjcomp - config tcp header compression
|
|
*/
|
|
int
|
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sifvjcomp(u, vjcomp, cidcomp, maxcid)
|
|
int u, vjcomp, cidcomp, maxcid;
|
|
{
|
|
u_int x;
|
|
|
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if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
|
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syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
|
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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(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
|
|
syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
|
|
return 0;
|
|
}
|
|
if (ioctl(fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
|
|
syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* sifup - Config the interface up and enable IP packets to pass.
|
|
*/
|
|
#ifndef SC_ENABLE_IP
|
|
#define SC_ENABLE_IP 0x100 /* compat for old versions of kernel code */
|
|
#endif
|
|
|
|
int
|
|
sifup(u)
|
|
int u;
|
|
{
|
|
struct ifreq ifr;
|
|
u_int x;
|
|
struct npioctl npi;
|
|
|
|
strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
|
|
if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
|
|
syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
|
|
return 0;
|
|
}
|
|
ifr.ifr_flags |= IFF_UP;
|
|
if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
|
|
syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
|
|
return 0;
|
|
}
|
|
npi.protocol = PPP_IP;
|
|
npi.mode = NPMODE_PASS;
|
|
if (ioctl(fd, PPPIOCSNPMODE, &npi) < 0) {
|
|
if (errno != ENOTTY) {
|
|
syslog(LOG_ERR, "ioctl(PPPIOCSNPMODE): %m");
|
|
return 0;
|
|
}
|
|
/* for backwards compatibility */
|
|
if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
|
|
syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
|
|
return 0;
|
|
}
|
|
x |= SC_ENABLE_IP;
|
|
if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
|
|
syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
|
|
return 0;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* sifdown - Config the interface down and disable IP.
|
|
*/
|
|
int
|
|
sifdown(u)
|
|
int u;
|
|
{
|
|
struct ifreq ifr;
|
|
u_int x;
|
|
int rv;
|
|
struct npioctl npi;
|
|
|
|
rv = 1;
|
|
npi.protocol = PPP_IP;
|
|
npi.mode = NPMODE_ERROR;
|
|
if (ioctl(fd, PPPIOCSNPMODE, (caddr_t) &npi) < 0) {
|
|
if (errno != ENOTTY) {
|
|
syslog(LOG_ERR, "ioctl(PPPIOCSNPMODE): %m");
|
|
rv = 0;
|
|
} else {
|
|
/* backwards compatibility */
|
|
if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
|
|
syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
|
|
rv = 0;
|
|
} else {
|
|
x &= ~SC_ENABLE_IP;
|
|
if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
|
|
syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
|
|
rv = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
|
|
if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
|
|
syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
|
|
rv = 0;
|
|
} else {
|
|
ifr.ifr_flags &= ~IFF_UP;
|
|
if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
|
|
syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
|
|
rv = 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;
|
|
|
|
strncpy(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));
|
|
if (ioctl(sockfd, SIOCAIFADDR, (caddr_t) &ifra) < 0) {
|
|
if (errno != EEXIST) {
|
|
syslog(LOG_ERR, "ioctl(SIOCAIFADDR): %m");
|
|
return 0;
|
|
}
|
|
syslog(LOG_WARNING, "ioctl(SIOCAIFADDR): Address already exists");
|
|
}
|
|
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;
|
|
|
|
strncpy(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) {
|
|
syslog(LOG_WARNING, "ioctl(SIOCDIFADDR): %m");
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* sifdefaultroute - assign a default route through the address given.
|
|
*/
|
|
int
|
|
sifdefaultroute(u, g)
|
|
int u;
|
|
u_int32_t g;
|
|
{
|
|
return dodefaultroute(g, 's');
|
|
}
|
|
|
|
/*
|
|
* cifdefaultroute - delete a default route through the address given.
|
|
*/
|
|
int
|
|
cifdefaultroute(u, g)
|
|
int u;
|
|
u_int32_t g;
|
|
{
|
|
return dodefaultroute(g, 'c');
|
|
}
|
|
|
|
/*
|
|
* dodefaultroute - talk to a routing socket to add/delete a default route.
|
|
*/
|
|
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) {
|
|
syslog(LOG_ERR, "%cifdefaultroute: opening routing socket: %m", cmd);
|
|
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) {
|
|
syslog(LOG_ERR, "%s default route: %m", cmd=='s'? "add": "delete");
|
|
close(routes);
|
|
return 0;
|
|
}
|
|
|
|
close(routes);
|
|
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;
|
|
int l;
|
|
|
|
/*
|
|
* 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)) {
|
|
syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
|
|
return 0;
|
|
}
|
|
|
|
if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
|
|
syslog(LOG_ERR, "sifproxyarp: opening routing 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) {
|
|
syslog(LOG_ERR, "add proxy arp entry: %m");
|
|
close(routes);
|
|
return 0;
|
|
}
|
|
|
|
close(routes);
|
|
arpmsg_valid = 1;
|
|
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) {
|
|
syslog(LOG_ERR, "sifproxyarp: opening routing socket: %m");
|
|
return 0;
|
|
}
|
|
|
|
if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
|
|
syslog(LOG_ERR, "delete proxy arp entry: %m");
|
|
close(routes);
|
|
return 0;
|
|
}
|
|
|
|
close(routes);
|
|
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)) {
|
|
syslog(LOG_ERR, "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) {
|
|
syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
|
|
return 0;
|
|
}
|
|
|
|
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) {
|
|
syslog(LOG_WARNING, "ioctl(SIOCDARP): %m");
|
|
return 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
|
|
|
|
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) {
|
|
syslog(LOG_ERR, "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;
|
|
strncpy(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;
|
|
syslog(LOG_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) {
|
|
syslog(LOG_WARNING, "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.
|
|
*/
|
|
strncpy(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;
|
|
}
|
|
|
|
/*
|
|
* lock - create a lock file for the named lock device
|
|
*/
|
|
#define LOCK_PREFIX "/var/spool/lock/LCK.."
|
|
|
|
int
|
|
lock(dev)
|
|
char *dev;
|
|
{
|
|
char hdb_lock_buffer[12];
|
|
int fd, pid, n;
|
|
char *p;
|
|
|
|
if ((p = strrchr(dev, '/')) != NULL)
|
|
dev = p + 1;
|
|
lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
|
|
if (lock_file == NULL)
|
|
novm("lock file name");
|
|
strcat(strcpy(lock_file, 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) {
|
|
hdb_lock_buffer[n] = 0;
|
|
pid = atoi(hdb_lock_buffer);
|
|
}
|
|
if (n <= 0) {
|
|
syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
|
|
close(fd);
|
|
} else {
|
|
if (kill(pid, 0) == -1 && errno == ESRCH) {
|
|
/* pid no longer exists - remove the lock file */
|
|
if (unlink(lock_file) == 0) {
|
|
close(fd);
|
|
syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)",
|
|
dev, pid);
|
|
continue;
|
|
} else
|
|
syslog(LOG_WARNING, "Couldn't remove stale lock on %s",
|
|
dev);
|
|
} else
|
|
syslog(LOG_NOTICE, "Device %s is locked by pid %d",
|
|
dev, pid);
|
|
}
|
|
close(fd);
|
|
} else
|
|
syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
|
|
free(lock_file);
|
|
lock_file = NULL;
|
|
return -1;
|
|
}
|
|
|
|
sprintf(hdb_lock_buffer, "%10d\n", getpid());
|
|
write(fd, hdb_lock_buffer, 11);
|
|
|
|
close(fd);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* unlock - remove our lockfile
|
|
*/
|
|
unlock()
|
|
{
|
|
if (lock_file) {
|
|
unlink(lock_file);
|
|
free(lock_file);
|
|
lock_file = NULL;
|
|
}
|
|
}
|