freebsd-dev/usr.sbin/ppp/tun.c

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/*-
* Copyright (c) 1997 Brian Somers <brian@Awfulhak.org>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
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* $FreeBSD$
*/
#include <sys/param.h>
#ifndef __FreeBSD__
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#include <sys/socket.h> /* For IFF_ defines */
#include <net/if.h> /* For IFF_ defines */
#endif
#include <netinet/in.h>
#include <net/if_types.h>
#include <net/if_tun.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <sys/un.h>
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#include <errno.h>
#include <string.h>
#if defined(__OpenBSD__) || defined(__NetBSD__)
#include <sys/ioctl.h>
#endif
#include <termios.h>
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#ifdef __NetBSD__
#include <stdio.h>
#include <unistd.h>
#endif
#include "layer.h"
#include "mbuf.h"
#include "log.h"
#include "timer.h"
#include "lqr.h"
#include "hdlc.h"
#include "defs.h"
#include "fsm.h"
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#include "throughput.h"
#include "iplist.h"
#include "slcompress.h"
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#include "ipcp.h"
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#include "filter.h"
#include "descriptor.h"
o Move struct lcp and struct ccp into struct link. o Remove bundle2lcp(), bundle2ccp() and bundle2link(). They're too resource-hungry and we have `owner pointers' to do their job. o Make our FSM understand LCPs that are always ST_OPENED (with a minimum code that != 1). o Send FSM code rejects for invalid codes. o Make our bundle fsm_parent deal with multiple links. o Make timer diagnostics pretty and allow access via ~t in `term' mode (not just when logging debug) and `show timers'. Only show timers every second in debug mode, otherwise we get too many diagnostics to be useful (we probably still do). Also, don't restrict ~m in term mode to depend on debug logging. o Rationalise our bundles' phases. o Create struct mp (multilink protocol). This is both an NCP and a type of struct link. It feeds off other NCPs for output, passing fragmented packets into the queues of available datalinks. It also gets PROTO_MP input, reassembles the fragments into ppp frames, and passes them back to the HDLC layer that the fragments were passed from. ** It's not yet possible to enter multilink mode :-( ** o Add `set weight' (requires context) for deciding on a links weighting in multilink mode. Weighting is simplistic (and probably badly implemented) for now. o Remove the function pointers in struct link. They ended up only applying to physical links. o Configure our tun device with an MTU equal to the MRU from struct mp's LCP and a speed equal to the sum of our link speeds. o `show {lcp,ccp,proto}' and `set deflate' now have optional context and use ChooseLink() to decide on which `struct link' to use. This allows behaviour as before when in non-multilink mode, and allows access to the MP logical link in multilink mode. o Ignore reconnect and redial values when in -direct mode and when cleaning up. Always redial when in -ddial or -dedicated mode (unless cleaning up). o Tell our links to `staydown' when we close them due to a signal. o Remove remaining `#ifdef SIGALRM's (ppp doesn't function without alarms). o Don't bother strdup()ing our physical link name. o Various other cosmetic changes.
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#include "lcp.h"
#include "ccp.h"
#include "link.h"
#include "mp.h"
#ifndef NORADIUS
#include "radius.h"
#endif
#include "bundle.h"
#include "tun.h"
void
tun_configure(struct bundle *bundle, int mtu)
{
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#ifdef __NetBSD__
struct ifreq ifr;
int s;
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s < 0) {
log_Printf(LogERROR, "tun_configure: socket(): %s\n", strerror(errno));
return;
}
sprintf(ifr.ifr_name, "tun%d", bundle->unit);
ifr.ifr_mtu = mtu;
if (ioctl(s, SIOCSIFMTU, &ifr) < 0)
log_Printf(LogERROR, "tun_configure: ioctl(SIOCSIFMTU): %s\n",
strerror(errno));
close(s);
#else
struct tuninfo info;
memset(&info, '\0', sizeof info);
info.type = IFT_PPP;
info.mtu = mtu;
info.baudrate = bundle->bandwidth;
#ifdef __OpenBSD__
info.flags = IFF_UP|IFF_POINTOPOINT;
#endif
if (ioctl(bundle->dev.fd, TUNSIFINFO, &info) < 0)
log_Printf(LogERROR, "tun_configure: ioctl(TUNSIFINFO): %s\n",
strerror(errno));
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#endif
}