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1940 lines
54 KiB
C
1940 lines
54 KiB
C
/*-
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* Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <net/if.h>
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#include <net/if_tun.h> /* For TUNS* ioctls */
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#include <net/route.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <sys/un.h>
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#include <errno.h>
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#include <fcntl.h>
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#ifdef __OpenBSD__
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#include <util.h>
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#else
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#include <libutil.h>
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#endif
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#include <paths.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/uio.h>
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#include <sys/wait.h>
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#include <termios.h>
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#include <unistd.h>
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#include "layer.h"
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#include "defs.h"
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#include "command.h"
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#include "mbuf.h"
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#include "log.h"
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#include "id.h"
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#include "timer.h"
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#include "fsm.h"
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#include "iplist.h"
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#include "lqr.h"
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#include "hdlc.h"
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#include "throughput.h"
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#include "slcompress.h"
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#include "ncpaddr.h"
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#include "ip.h"
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#include "ipcp.h"
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#include "filter.h"
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#include "descriptor.h"
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#include "route.h"
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#include "lcp.h"
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#include "ccp.h"
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#include "link.h"
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#include "mp.h"
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#ifndef NORADIUS
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#include "radius.h"
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#endif
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#include "ipv6cp.h"
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#include "ncp.h"
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#include "bundle.h"
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#include "async.h"
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#include "physical.h"
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#include "auth.h"
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#include "proto.h"
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#include "chap.h"
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#include "tun.h"
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#include "prompt.h"
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#include "chat.h"
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#include "cbcp.h"
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#include "datalink.h"
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#include "iface.h"
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#include "server.h"
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#include "probe.h"
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#ifndef NODES
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#include "mppe.h"
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#endif
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#define SCATTER_SEGMENTS 7 /* version, datalink, name, physical,
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throughput, throughput, device */
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#define SEND_MAXFD 3 /* Max file descriptors passed through
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the local domain socket */
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static int bundle_RemainingIdleTime(struct bundle *);
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static const char * const PhaseNames[] = {
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"Dead", "Establish", "Authenticate", "Network", "Terminate"
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};
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const char *
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bundle_PhaseName(struct bundle *bundle)
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{
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return bundle->phase <= PHASE_TERMINATE ?
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PhaseNames[bundle->phase] : "unknown";
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}
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void
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bundle_NewPhase(struct bundle *bundle, u_int new)
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{
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if (new == bundle->phase)
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return;
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if (new <= PHASE_TERMINATE)
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log_Printf(LogPHASE, "bundle: %s\n", PhaseNames[new]);
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switch (new) {
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case PHASE_DEAD:
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bundle->phase = new;
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#ifndef NODES
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MPPE_MasterKeyValid = 0;
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#endif
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log_DisplayPrompts();
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break;
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case PHASE_ESTABLISH:
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bundle->phase = new;
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break;
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case PHASE_AUTHENTICATE:
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bundle->phase = new;
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log_DisplayPrompts();
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break;
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case PHASE_NETWORK:
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if (ncp_fsmStart(&bundle->ncp, bundle)) {
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bundle->phase = new;
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log_DisplayPrompts();
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} else {
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log_Printf(LogPHASE, "bundle: All NCPs are disabled\n");
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bundle_Close(bundle, NULL, CLOSE_STAYDOWN);
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}
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break;
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case PHASE_TERMINATE:
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bundle->phase = new;
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mp_Down(&bundle->ncp.mp);
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log_DisplayPrompts();
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break;
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}
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}
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static void
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bundle_LayerStart(void *v, struct fsm *fp)
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{
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/* The given FSM is about to start up ! */
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}
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void
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bundle_Notify(struct bundle *bundle, char c)
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{
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if (bundle->notify.fd != -1) {
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int ret;
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ret = write(bundle->notify.fd, &c, 1);
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if (c != EX_REDIAL && c != EX_RECONNECT) {
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if (ret == 1)
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log_Printf(LogCHAT, "Parent notified of %s\n",
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c == EX_NORMAL ? "success" : "failure");
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else
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log_Printf(LogERROR, "Failed to notify parent of success\n");
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close(bundle->notify.fd);
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bundle->notify.fd = -1;
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} else if (ret == 1)
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log_Printf(LogCHAT, "Parent notified of %s\n", ex_desc(c));
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else
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log_Printf(LogERROR, "Failed to notify parent of %s\n", ex_desc(c));
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}
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}
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static void
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bundle_ClearQueues(void *v)
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{
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struct bundle *bundle = (struct bundle *)v;
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struct datalink *dl;
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log_Printf(LogPHASE, "Clearing choked output queue\n");
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timer_Stop(&bundle->choked.timer);
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/*
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* Emergency time:
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*
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* We've had a full queue for PACKET_DEL_SECS seconds without being
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* able to get rid of any of the packets. We've probably given up
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* on the redials at this point, and the queued data has almost
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* definitely been timed out by the layer above. As this is preventing
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* us from reading the TUN_NAME device (we don't want to buffer stuff
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* indefinitely), we may as well nuke this data and start with a clean
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* slate !
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*
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* Unfortunately, this has the side effect of shafting any compression
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* dictionaries in use (causing the relevant RESET_REQ/RESET_ACK).
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*/
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ncp_DeleteQueues(&bundle->ncp);
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for (dl = bundle->links; dl; dl = dl->next)
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physical_DeleteQueue(dl->physical);
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}
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static void
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bundle_LinkAdded(struct bundle *bundle, struct datalink *dl)
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{
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bundle->phys_type.all |= dl->physical->type;
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if (dl->state == DATALINK_OPEN)
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bundle->phys_type.open |= dl->physical->type;
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if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL))
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!= bundle->phys_type.open && bundle->idle.timer.state == TIMER_STOPPED)
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/* We may need to start our idle timer */
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bundle_StartIdleTimer(bundle, 0);
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}
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void
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bundle_LinksRemoved(struct bundle *bundle)
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{
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struct datalink *dl;
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bundle->phys_type.all = bundle->phys_type.open = 0;
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for (dl = bundle->links; dl; dl = dl->next)
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bundle_LinkAdded(bundle, dl);
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bundle_CalculateBandwidth(bundle);
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mp_CheckAutoloadTimer(&bundle->ncp.mp);
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if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL))
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== bundle->phys_type.open)
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bundle_StopIdleTimer(bundle);
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}
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static void
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bundle_LayerUp(void *v, struct fsm *fp)
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{
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/*
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* The given fsm is now up
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* If it's an LCP, adjust our phys_mode.open value and check the
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* autoload timer.
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* If it's the first NCP, calculate our bandwidth
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* If it's the first NCP, set our ``upat'' time
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* If it's the first NCP, start the idle timer.
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* If it's an NCP, tell our -background parent to go away.
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* If it's the first NCP, start the autoload timer
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*/
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struct bundle *bundle = (struct bundle *)v;
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if (fp->proto == PROTO_LCP) {
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struct physical *p = link2physical(fp->link);
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bundle_LinkAdded(bundle, p->dl);
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mp_CheckAutoloadTimer(&bundle->ncp.mp);
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} else if (isncp(fp->proto)) {
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if (ncp_LayersOpen(&fp->bundle->ncp) == 1) {
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bundle_CalculateBandwidth(fp->bundle);
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time(&bundle->upat);
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bundle_StartIdleTimer(bundle, 0);
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mp_CheckAutoloadTimer(&fp->bundle->ncp.mp);
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}
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bundle_Notify(bundle, EX_NORMAL);
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} else if (fp->proto == PROTO_CCP)
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bundle_CalculateBandwidth(fp->bundle); /* Against ccp_MTUOverhead */
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}
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static void
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bundle_LayerDown(void *v, struct fsm *fp)
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{
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/*
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* The given FSM has been told to come down.
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* If it's our last NCP, stop the idle timer.
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* If it's our last NCP, clear our ``upat'' value.
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* If it's our last NCP, stop the autoload timer
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* If it's an LCP, adjust our phys_type.open value and any timers.
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* If it's an LCP and we're in multilink mode, adjust our tun
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* If it's the last LCP, down all NCPs
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* speed and make sure our minimum sequence number is adjusted.
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*/
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struct bundle *bundle = (struct bundle *)v;
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if (isncp(fp->proto)) {
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if (ncp_LayersOpen(&fp->bundle->ncp) == 0) {
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bundle_StopIdleTimer(bundle);
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bundle->upat = 0;
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mp_StopAutoloadTimer(&bundle->ncp.mp);
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}
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} else if (fp->proto == PROTO_LCP) {
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struct datalink *dl;
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struct datalink *lost;
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int others_active;
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bundle_LinksRemoved(bundle); /* adjust timers & phys_type values */
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lost = NULL;
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others_active = 0;
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for (dl = bundle->links; dl; dl = dl->next) {
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if (fp == &dl->physical->link.lcp.fsm)
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lost = dl;
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else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP)
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others_active++;
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}
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if (bundle->ncp.mp.active) {
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bundle_CalculateBandwidth(bundle);
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if (lost)
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mp_LinkLost(&bundle->ncp.mp, lost);
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else
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log_Printf(LogALERT, "Oops, lost an unrecognised datalink (%s) !\n",
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fp->link->name);
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}
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if (!others_active) {
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/* Down the NCPs. We don't expect to get fsm_Close()d ourself ! */
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ncp2initial(&bundle->ncp);
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mp_Down(&bundle->ncp.mp);
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}
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}
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}
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static void
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bundle_LayerFinish(void *v, struct fsm *fp)
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{
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/* The given fsm is now down (fp cannot be NULL)
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*
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* If it's the last NCP, fsm_Close all LCPs
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* If it's the last NCP, bring any MP layer down
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*/
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struct bundle *bundle = (struct bundle *)v;
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struct datalink *dl;
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if (isncp(fp->proto) && !ncp_LayersUnfinished(&bundle->ncp)) {
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if (bundle_Phase(bundle) != PHASE_DEAD)
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bundle_NewPhase(bundle, PHASE_TERMINATE);
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for (dl = bundle->links; dl; dl = dl->next)
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if (dl->state == DATALINK_OPEN)
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datalink_Close(dl, CLOSE_STAYDOWN);
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fsm2initial(fp);
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mp_Down(&bundle->ncp.mp);
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}
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}
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void
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bundle_Close(struct bundle *bundle, const char *name, int how)
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{
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/*
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* Please close the given datalink.
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* If name == NULL or name is the last datalink, fsm_Close all NCPs
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* (except our MP)
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* If it isn't the last datalink, just Close that datalink.
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*/
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struct datalink *dl, *this_dl;
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int others_active;
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others_active = 0;
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this_dl = NULL;
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for (dl = bundle->links; dl; dl = dl->next) {
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if (name && !strcasecmp(name, dl->name))
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this_dl = dl;
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if (name == NULL || this_dl == dl) {
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switch (how) {
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case CLOSE_LCP:
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datalink_DontHangup(dl);
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break;
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case CLOSE_STAYDOWN:
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datalink_StayDown(dl);
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break;
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}
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} else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP)
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others_active++;
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}
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if (name && this_dl == NULL) {
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log_Printf(LogWARN, "%s: Invalid datalink name\n", name);
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return;
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}
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if (!others_active) {
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bundle_StopIdleTimer(bundle);
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if (ncp_LayersUnfinished(&bundle->ncp))
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ncp_Close(&bundle->ncp);
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else {
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ncp2initial(&bundle->ncp);
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mp_Down(&bundle->ncp.mp);
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for (dl = bundle->links; dl; dl = dl->next)
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datalink_Close(dl, how);
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}
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} else if (this_dl && this_dl->state != DATALINK_CLOSED &&
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this_dl->state != DATALINK_HANGUP)
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datalink_Close(this_dl, how);
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}
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void
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bundle_Down(struct bundle *bundle, int how)
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{
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struct datalink *dl;
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for (dl = bundle->links; dl; dl = dl->next)
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datalink_Down(dl, how);
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}
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static int
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bundle_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n)
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{
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struct bundle *bundle = descriptor2bundle(d);
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struct datalink *dl;
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int result, nlinks;
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u_short ifqueue;
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size_t queued;
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result = 0;
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/* If there are aren't many packets queued, look for some more. */
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for (nlinks = 0, dl = bundle->links; dl; dl = dl->next)
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nlinks++;
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if (nlinks) {
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queued = r ? ncp_FillPhysicalQueues(&bundle->ncp, bundle) :
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ncp_QueueLen(&bundle->ncp);
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if (r && (bundle->phase == PHASE_NETWORK ||
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bundle->phys_type.all & PHYS_AUTO)) {
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/* enough surplus so that we can tell if we're getting swamped */
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ifqueue = nlinks > bundle->cfg.ifqueue ? nlinks : bundle->cfg.ifqueue;
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if (queued < ifqueue) {
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/* Not enough - select() for more */
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if (bundle->choked.timer.state == TIMER_RUNNING)
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timer_Stop(&bundle->choked.timer); /* Not needed any more */
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FD_SET(bundle->dev.fd, r);
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if (*n < bundle->dev.fd + 1)
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*n = bundle->dev.fd + 1;
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log_Printf(LogTIMER, "%s: fdset(r) %d\n", TUN_NAME, bundle->dev.fd);
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result++;
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} else if (bundle->choked.timer.state == TIMER_STOPPED) {
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bundle->choked.timer.func = bundle_ClearQueues;
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bundle->choked.timer.name = "output choke";
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bundle->choked.timer.load = bundle->cfg.choked.timeout * SECTICKS;
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bundle->choked.timer.arg = bundle;
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timer_Start(&bundle->choked.timer);
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}
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}
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}
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#ifndef NORADIUS
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result += descriptor_UpdateSet(&bundle->radius.desc, r, w, e, n);
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#endif
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/* Which links need a select() ? */
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for (dl = bundle->links; dl; dl = dl->next)
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result += descriptor_UpdateSet(&dl->desc, r, w, e, n);
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/*
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* This *MUST* be called after the datalink UpdateSet()s as it
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* might be ``holding'' one of the datalinks (death-row) and
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* wants to be able to de-select() it from the descriptor set.
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*/
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result += descriptor_UpdateSet(&bundle->ncp.mp.server.desc, r, w, e, n);
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return result;
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}
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static int
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bundle_IsSet(struct fdescriptor *d, const fd_set *fdset)
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{
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struct bundle *bundle = descriptor2bundle(d);
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struct datalink *dl;
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for (dl = bundle->links; dl; dl = dl->next)
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if (descriptor_IsSet(&dl->desc, fdset))
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return 1;
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#ifndef NORADIUS
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if (descriptor_IsSet(&bundle->radius.desc, fdset))
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return 1;
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#endif
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if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset))
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return 1;
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return FD_ISSET(bundle->dev.fd, fdset);
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}
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static void
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bundle_DescriptorRead(struct fdescriptor *d, struct bundle *bundle,
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const fd_set *fdset)
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{
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struct datalink *dl;
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unsigned secs;
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u_int32_t af;
|
|
|
|
if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset))
|
|
descriptor_Read(&bundle->ncp.mp.server.desc, bundle, fdset);
|
|
|
|
for (dl = bundle->links; dl; dl = dl->next)
|
|
if (descriptor_IsSet(&dl->desc, fdset))
|
|
descriptor_Read(&dl->desc, bundle, fdset);
|
|
|
|
#ifndef NORADIUS
|
|
if (descriptor_IsSet(&bundle->radius.desc, fdset))
|
|
descriptor_Read(&bundle->radius.desc, bundle, fdset);
|
|
#endif
|
|
|
|
if (FD_ISSET(bundle->dev.fd, fdset)) {
|
|
struct tun_data tun;
|
|
int n, pri;
|
|
u_char *data;
|
|
size_t sz;
|
|
|
|
if (bundle->dev.header) {
|
|
data = (u_char *)&tun;
|
|
sz = sizeof tun;
|
|
} else {
|
|
data = tun.data;
|
|
sz = sizeof tun.data;
|
|
}
|
|
|
|
/* something to read from tun */
|
|
|
|
n = read(bundle->dev.fd, data, sz);
|
|
if (n < 0) {
|
|
log_Printf(LogWARN, "%s: read: %s\n", bundle->dev.Name, strerror(errno));
|
|
return;
|
|
}
|
|
|
|
if (bundle->dev.header) {
|
|
n -= sz - sizeof tun.data;
|
|
if (n <= 0) {
|
|
log_Printf(LogERROR, "%s: read: Got only %d bytes of data !\n",
|
|
bundle->dev.Name, n);
|
|
return;
|
|
}
|
|
af = ntohl(tun.header.family);
|
|
#ifndef NOINET6
|
|
if (af != AF_INET && af != AF_INET6)
|
|
#else
|
|
if (af != AF_INET)
|
|
#endif
|
|
/* XXX: Should be maintaining drop/family counts ! */
|
|
return;
|
|
} else
|
|
af = AF_INET;
|
|
|
|
if (af == AF_INET && ((struct ip *)tun.data)->ip_dst.s_addr ==
|
|
bundle->ncp.ipcp.my_ip.s_addr) {
|
|
/* we've been asked to send something addressed *to* us :( */
|
|
if (Enabled(bundle, OPT_LOOPBACK)) {
|
|
pri = PacketCheck(bundle, af, tun.data, n, &bundle->filter.in,
|
|
NULL, NULL);
|
|
if (pri >= 0) {
|
|
n += sz - sizeof tun.data;
|
|
write(bundle->dev.fd, data, n);
|
|
log_Printf(LogDEBUG, "Looped back packet addressed to myself\n");
|
|
}
|
|
return;
|
|
} else
|
|
log_Printf(LogDEBUG, "Oops - forwarding packet addressed to myself\n");
|
|
}
|
|
|
|
/*
|
|
* Process on-demand dialup. Output packets are queued within the tunnel
|
|
* device until the appropriate NCP is opened.
|
|
*/
|
|
|
|
if (bundle_Phase(bundle) == PHASE_DEAD) {
|
|
/*
|
|
* Note, we must be in AUTO mode :-/ otherwise our interface should
|
|
* *not* be UP and we can't receive data
|
|
*/
|
|
pri = PacketCheck(bundle, af, tun.data, n, &bundle->filter.dial,
|
|
NULL, NULL);
|
|
if (pri >= 0)
|
|
bundle_Open(bundle, NULL, PHYS_AUTO, 0);
|
|
else
|
|
/*
|
|
* Drop the packet. If we were to queue it, we'd just end up with
|
|
* a pile of timed-out data in our output queue by the time we get
|
|
* around to actually dialing. We'd also prematurely reach the
|
|
* threshold at which we stop select()ing to read() the tun
|
|
* device - breaking auto-dial.
|
|
*/
|
|
return;
|
|
}
|
|
|
|
secs = 0;
|
|
pri = PacketCheck(bundle, af, tun.data, n, &bundle->filter.out,
|
|
NULL, &secs);
|
|
if (pri >= 0) {
|
|
/* Prepend the number of seconds timeout given in the filter */
|
|
tun.header.timeout = secs;
|
|
ncp_Enqueue(&bundle->ncp, af, pri, (char *)&tun, n + sizeof tun.header);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int
|
|
bundle_DescriptorWrite(struct fdescriptor *d, struct bundle *bundle,
|
|
const fd_set *fdset)
|
|
{
|
|
struct datalink *dl;
|
|
int result = 0;
|
|
|
|
/* This is not actually necessary as struct mpserver doesn't Write() */
|
|
if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset))
|
|
if (descriptor_Write(&bundle->ncp.mp.server.desc, bundle, fdset) == 1)
|
|
result++;
|
|
|
|
for (dl = bundle->links; dl; dl = dl->next)
|
|
if (descriptor_IsSet(&dl->desc, fdset))
|
|
switch (descriptor_Write(&dl->desc, bundle, fdset)) {
|
|
case -1:
|
|
datalink_ComeDown(dl, CLOSE_NORMAL);
|
|
break;
|
|
case 1:
|
|
result++;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
void
|
|
bundle_LockTun(struct bundle *bundle)
|
|
{
|
|
FILE *lockfile;
|
|
char pidfile[PATH_MAX];
|
|
|
|
snprintf(pidfile, sizeof pidfile, "%stun%d.pid", _PATH_VARRUN, bundle->unit);
|
|
lockfile = ID0fopen(pidfile, "w");
|
|
if (lockfile != NULL) {
|
|
fprintf(lockfile, "%d\n", (int)getpid());
|
|
fclose(lockfile);
|
|
}
|
|
#ifndef RELEASE_CRUNCH
|
|
else
|
|
log_Printf(LogERROR, "Warning: Can't create %s: %s\n",
|
|
pidfile, strerror(errno));
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
bundle_UnlockTun(struct bundle *bundle)
|
|
{
|
|
char pidfile[PATH_MAX];
|
|
|
|
snprintf(pidfile, sizeof pidfile, "%stun%d.pid", _PATH_VARRUN, bundle->unit);
|
|
ID0unlink(pidfile);
|
|
}
|
|
|
|
struct bundle *
|
|
bundle_Create(const char *prefix, int type, int unit)
|
|
{
|
|
static struct bundle bundle; /* there can be only one */
|
|
int enoentcount, err, minunit, maxunit;
|
|
const char *ifname;
|
|
#if defined(__FreeBSD__) && !defined(NOKLDLOAD)
|
|
int kldtried;
|
|
#endif
|
|
#if defined(TUNSIFMODE) || defined(TUNSLMODE) || defined(TUNSIFHEAD)
|
|
int iff;
|
|
#endif
|
|
|
|
if (bundle.iface != NULL) { /* Already allocated ! */
|
|
log_Printf(LogALERT, "bundle_Create: There's only one BUNDLE !\n");
|
|
return NULL;
|
|
}
|
|
|
|
if (unit == -1) {
|
|
minunit = 0;
|
|
maxunit = -1;
|
|
} else {
|
|
minunit = unit;
|
|
maxunit = unit + 1;
|
|
}
|
|
err = ENOENT;
|
|
enoentcount = 0;
|
|
#if defined(__FreeBSD__) && !defined(NOKLDLOAD)
|
|
kldtried = 0;
|
|
#endif
|
|
for (bundle.unit = minunit; bundle.unit != maxunit; bundle.unit++) {
|
|
snprintf(bundle.dev.Name, sizeof bundle.dev.Name, "%s%d",
|
|
prefix, bundle.unit);
|
|
bundle.dev.fd = ID0open(bundle.dev.Name, O_RDWR);
|
|
if (bundle.dev.fd >= 0)
|
|
break;
|
|
else if (errno == ENXIO || errno == ENOENT) {
|
|
#if defined(__FreeBSD__) && !defined(NOKLDLOAD)
|
|
if (bundle.unit == minunit && !kldtried++) {
|
|
/*
|
|
* Attempt to load the tunnel interface KLD if it isn't loaded
|
|
* already.
|
|
*/
|
|
if (loadmodules(LOAD_VERBOSLY, "if_tun", NULL))
|
|
bundle.unit--;
|
|
continue;
|
|
}
|
|
#endif
|
|
if (errno != ENOENT || ++enoentcount > 2) {
|
|
err = errno;
|
|
break;
|
|
}
|
|
} else
|
|
err = errno;
|
|
}
|
|
|
|
if (bundle.dev.fd < 0) {
|
|
if (unit == -1)
|
|
log_Printf(LogWARN, "No available tunnel devices found (%s)\n",
|
|
strerror(err));
|
|
else
|
|
log_Printf(LogWARN, "%s%d: %s\n", prefix, unit, strerror(err));
|
|
return NULL;
|
|
}
|
|
|
|
log_SetTun(bundle.unit);
|
|
|
|
ifname = strrchr(bundle.dev.Name, '/');
|
|
if (ifname == NULL)
|
|
ifname = bundle.dev.Name;
|
|
else
|
|
ifname++;
|
|
|
|
bundle.iface = iface_Create(ifname);
|
|
if (bundle.iface == NULL) {
|
|
close(bundle.dev.fd);
|
|
return NULL;
|
|
}
|
|
|
|
#ifdef TUNSIFMODE
|
|
/* Make sure we're POINTOPOINT & IFF_MULTICAST */
|
|
iff = IFF_POINTOPOINT | IFF_MULTICAST;
|
|
if (ID0ioctl(bundle.dev.fd, TUNSIFMODE, &iff) < 0)
|
|
log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFMODE): %s\n",
|
|
strerror(errno));
|
|
#endif
|
|
|
|
#ifdef TUNSLMODE
|
|
/* Make sure we're not prepending sockaddrs */
|
|
iff = 0;
|
|
if (ID0ioctl(bundle.dev.fd, TUNSLMODE, &iff) < 0)
|
|
log_Printf(LogERROR, "bundle_Create: ioctl(TUNSLMODE): %s\n",
|
|
strerror(errno));
|
|
#endif
|
|
|
|
#ifdef TUNSIFHEAD
|
|
/* We want the address family please ! */
|
|
iff = 1;
|
|
if (ID0ioctl(bundle.dev.fd, TUNSIFHEAD, &iff) < 0) {
|
|
log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFHEAD): %s\n",
|
|
strerror(errno));
|
|
bundle.dev.header = 0;
|
|
} else
|
|
bundle.dev.header = 1;
|
|
#else
|
|
#ifdef __OpenBSD__
|
|
/* Always present for OpenBSD */
|
|
bundle.dev.header = 1;
|
|
#else
|
|
/*
|
|
* If TUNSIFHEAD isn't available and we're not OpenBSD, assume
|
|
* everything's AF_INET (hopefully the tun device won't pass us
|
|
* anything else !).
|
|
*/
|
|
bundle.dev.header = 0;
|
|
#endif
|
|
#endif
|
|
|
|
log_Printf(LogPHASE, "Using interface: %s\n", ifname);
|
|
|
|
bundle.bandwidth = 0;
|
|
bundle.routing_seq = 0;
|
|
bundle.phase = PHASE_DEAD;
|
|
bundle.CleaningUp = 0;
|
|
bundle.NatEnabled = 0;
|
|
|
|
bundle.fsm.LayerStart = bundle_LayerStart;
|
|
bundle.fsm.LayerUp = bundle_LayerUp;
|
|
bundle.fsm.LayerDown = bundle_LayerDown;
|
|
bundle.fsm.LayerFinish = bundle_LayerFinish;
|
|
bundle.fsm.object = &bundle;
|
|
|
|
bundle.cfg.idle.timeout = NCP_IDLE_TIMEOUT;
|
|
bundle.cfg.idle.min_timeout = 0;
|
|
*bundle.cfg.auth.name = '\0';
|
|
*bundle.cfg.auth.key = '\0';
|
|
bundle.cfg.opt = OPT_IDCHECK | OPT_LOOPBACK | OPT_SROUTES | OPT_TCPMSSFIXUP |
|
|
OPT_THROUGHPUT | OPT_UTMP;
|
|
#ifndef NOINET6
|
|
bundle.cfg.opt |= OPT_IPCP;
|
|
if (probe.ipv6_available)
|
|
bundle.cfg.opt |= OPT_IPV6CP;
|
|
#endif
|
|
*bundle.cfg.label = '\0';
|
|
bundle.cfg.ifqueue = DEF_IFQUEUE;
|
|
bundle.cfg.choked.timeout = CHOKED_TIMEOUT;
|
|
bundle.phys_type.all = type;
|
|
bundle.phys_type.open = 0;
|
|
bundle.upat = 0;
|
|
|
|
bundle.links = datalink_Create("deflink", &bundle, type);
|
|
if (bundle.links == NULL) {
|
|
log_Printf(LogALERT, "Cannot create data link: %s\n", strerror(errno));
|
|
iface_Destroy(bundle.iface);
|
|
bundle.iface = NULL;
|
|
close(bundle.dev.fd);
|
|
return NULL;
|
|
}
|
|
|
|
bundle.desc.type = BUNDLE_DESCRIPTOR;
|
|
bundle.desc.UpdateSet = bundle_UpdateSet;
|
|
bundle.desc.IsSet = bundle_IsSet;
|
|
bundle.desc.Read = bundle_DescriptorRead;
|
|
bundle.desc.Write = bundle_DescriptorWrite;
|
|
|
|
ncp_Init(&bundle.ncp, &bundle);
|
|
|
|
memset(&bundle.filter, '\0', sizeof bundle.filter);
|
|
bundle.filter.in.fragok = bundle.filter.in.logok = 1;
|
|
bundle.filter.in.name = "IN";
|
|
bundle.filter.out.fragok = bundle.filter.out.logok = 1;
|
|
bundle.filter.out.name = "OUT";
|
|
bundle.filter.dial.name = "DIAL";
|
|
bundle.filter.dial.logok = 1;
|
|
bundle.filter.alive.name = "ALIVE";
|
|
bundle.filter.alive.logok = 1;
|
|
{
|
|
int i;
|
|
for (i = 0; i < MAXFILTERS; i++) {
|
|
bundle.filter.in.rule[i].f_action = A_NONE;
|
|
bundle.filter.out.rule[i].f_action = A_NONE;
|
|
bundle.filter.dial.rule[i].f_action = A_NONE;
|
|
bundle.filter.alive.rule[i].f_action = A_NONE;
|
|
}
|
|
}
|
|
memset(&bundle.idle.timer, '\0', sizeof bundle.idle.timer);
|
|
bundle.idle.done = 0;
|
|
bundle.notify.fd = -1;
|
|
memset(&bundle.choked.timer, '\0', sizeof bundle.choked.timer);
|
|
#ifndef NORADIUS
|
|
radius_Init(&bundle.radius);
|
|
#endif
|
|
|
|
/* Clean out any leftover crud */
|
|
iface_Clear(bundle.iface, &bundle.ncp, 0, IFACE_CLEAR_ALL);
|
|
|
|
bundle_LockTun(&bundle);
|
|
|
|
return &bundle;
|
|
}
|
|
|
|
static void
|
|
bundle_DownInterface(struct bundle *bundle)
|
|
{
|
|
route_IfDelete(bundle, 1);
|
|
iface_ClearFlags(bundle->iface->name, IFF_UP);
|
|
}
|
|
|
|
void
|
|
bundle_Destroy(struct bundle *bundle)
|
|
{
|
|
struct datalink *dl;
|
|
|
|
/*
|
|
* Clean up the interface. We don't really need to do the timer_Stop()s,
|
|
* mp_Down(), iface_Clear() and bundle_DownInterface() unless we're getting
|
|
* out under exceptional conditions such as a descriptor exception.
|
|
*/
|
|
timer_Stop(&bundle->idle.timer);
|
|
timer_Stop(&bundle->choked.timer);
|
|
mp_Down(&bundle->ncp.mp);
|
|
iface_Clear(bundle->iface, &bundle->ncp, 0, IFACE_CLEAR_ALL);
|
|
bundle_DownInterface(bundle);
|
|
|
|
#ifndef NORADIUS
|
|
/* Tell the radius server the bad news */
|
|
radius_Destroy(&bundle->radius);
|
|
#endif
|
|
|
|
/* Again, these are all DATALINK_CLOSED unless we're abending */
|
|
dl = bundle->links;
|
|
while (dl)
|
|
dl = datalink_Destroy(dl);
|
|
|
|
ncp_Destroy(&bundle->ncp);
|
|
|
|
close(bundle->dev.fd);
|
|
bundle_UnlockTun(bundle);
|
|
|
|
/* In case we never made PHASE_NETWORK */
|
|
bundle_Notify(bundle, EX_ERRDEAD);
|
|
|
|
iface_Destroy(bundle->iface);
|
|
bundle->iface = NULL;
|
|
}
|
|
|
|
void
|
|
bundle_LinkClosed(struct bundle *bundle, struct datalink *dl)
|
|
{
|
|
/*
|
|
* Our datalink has closed.
|
|
* CleanDatalinks() (called from DoLoop()) will remove closed
|
|
* BACKGROUND, FOREGROUND and DIRECT links.
|
|
* If it's the last data link, enter phase DEAD.
|
|
*
|
|
* NOTE: dl may not be in our list (bundle_SendDatalink()) !
|
|
*/
|
|
|
|
struct datalink *odl;
|
|
int other_links;
|
|
|
|
log_SetTtyCommandMode(dl);
|
|
|
|
other_links = 0;
|
|
for (odl = bundle->links; odl; odl = odl->next)
|
|
if (odl != dl && odl->state != DATALINK_CLOSED)
|
|
other_links++;
|
|
|
|
if (!other_links) {
|
|
if (dl->physical->type != PHYS_AUTO) /* Not in -auto mode */
|
|
bundle_DownInterface(bundle);
|
|
ncp2initial(&bundle->ncp);
|
|
mp_Down(&bundle->ncp.mp);
|
|
bundle_NewPhase(bundle, PHASE_DEAD);
|
|
bundle_StopIdleTimer(bundle);
|
|
}
|
|
}
|
|
|
|
void
|
|
bundle_Open(struct bundle *bundle, const char *name, int mask, int force)
|
|
{
|
|
/*
|
|
* Please open the given datalink, or all if name == NULL
|
|
*/
|
|
struct datalink *dl;
|
|
|
|
for (dl = bundle->links; dl; dl = dl->next)
|
|
if (name == NULL || !strcasecmp(dl->name, name)) {
|
|
if ((mask & dl->physical->type) &&
|
|
(dl->state == DATALINK_CLOSED ||
|
|
(force && dl->state == DATALINK_OPENING &&
|
|
dl->dial.timer.state == TIMER_RUNNING) ||
|
|
dl->state == DATALINK_READY)) {
|
|
timer_Stop(&dl->dial.timer); /* We're finished with this */
|
|
datalink_Up(dl, 1, 1);
|
|
if (mask & PHYS_AUTO)
|
|
break; /* Only one AUTO link at a time */
|
|
}
|
|
if (name != NULL)
|
|
break;
|
|
}
|
|
}
|
|
|
|
struct datalink *
|
|
bundle2datalink(struct bundle *bundle, const char *name)
|
|
{
|
|
struct datalink *dl;
|
|
|
|
if (name != NULL) {
|
|
for (dl = bundle->links; dl; dl = dl->next)
|
|
if (!strcasecmp(dl->name, name))
|
|
return dl;
|
|
} else if (bundle->links && !bundle->links->next)
|
|
return bundle->links;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int
|
|
bundle_ShowLinks(struct cmdargs const *arg)
|
|
{
|
|
struct datalink *dl;
|
|
struct pppThroughput *t;
|
|
unsigned long long octets;
|
|
int secs;
|
|
|
|
for (dl = arg->bundle->links; dl; dl = dl->next) {
|
|
octets = MAX(dl->physical->link.stats.total.in.OctetsPerSecond,
|
|
dl->physical->link.stats.total.out.OctetsPerSecond);
|
|
|
|
prompt_Printf(arg->prompt, "Name: %s [%s, %s]",
|
|
dl->name, mode2Nam(dl->physical->type), datalink_State(dl));
|
|
if (dl->physical->link.stats.total.rolling && dl->state == DATALINK_OPEN)
|
|
prompt_Printf(arg->prompt, " bandwidth %d, %llu bps (%llu bytes/sec)",
|
|
dl->mp.bandwidth ? dl->mp.bandwidth :
|
|
physical_GetSpeed(dl->physical),
|
|
octets * 8, octets);
|
|
prompt_Printf(arg->prompt, "\n");
|
|
}
|
|
|
|
t = &arg->bundle->ncp.mp.link.stats.total;
|
|
octets = MAX(t->in.OctetsPerSecond, t->out.OctetsPerSecond);
|
|
secs = t->downtime ? 0 : throughput_uptime(t);
|
|
if (secs > t->SamplePeriod)
|
|
secs = t->SamplePeriod;
|
|
if (secs)
|
|
prompt_Printf(arg->prompt, "Currently averaging %llu bps (%llu bytes/sec)"
|
|
" over the last %d secs\n", octets * 8, octets, secs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const char *
|
|
optval(struct bundle *bundle, int bit)
|
|
{
|
|
return (bundle->cfg.opt & bit) ? "enabled" : "disabled";
|
|
}
|
|
|
|
int
|
|
bundle_ShowStatus(struct cmdargs const *arg)
|
|
{
|
|
int remaining;
|
|
|
|
prompt_Printf(arg->prompt, "Phase %s\n", bundle_PhaseName(arg->bundle));
|
|
prompt_Printf(arg->prompt, " Device: %s\n", arg->bundle->dev.Name);
|
|
prompt_Printf(arg->prompt, " Interface: %s @ %lubps",
|
|
arg->bundle->iface->name, arg->bundle->bandwidth);
|
|
|
|
if (arg->bundle->upat) {
|
|
int secs = bundle_Uptime(arg->bundle);
|
|
|
|
prompt_Printf(arg->prompt, ", up time %d:%02d:%02d", secs / 3600,
|
|
(secs / 60) % 60, secs % 60);
|
|
}
|
|
prompt_Printf(arg->prompt, "\n Queued: %lu of %u\n",
|
|
(unsigned long)ncp_QueueLen(&arg->bundle->ncp),
|
|
arg->bundle->cfg.ifqueue);
|
|
|
|
prompt_Printf(arg->prompt, "\nDefaults:\n");
|
|
prompt_Printf(arg->prompt, " Label: %s\n",
|
|
arg->bundle->cfg.label);
|
|
prompt_Printf(arg->prompt, " Auth name: %s\n",
|
|
arg->bundle->cfg.auth.name);
|
|
prompt_Printf(arg->prompt, " Diagnostic socket: ");
|
|
if (*server.cfg.sockname != '\0') {
|
|
prompt_Printf(arg->prompt, "%s", server.cfg.sockname);
|
|
if (server.cfg.mask != (mode_t)-1)
|
|
prompt_Printf(arg->prompt, ", mask 0%03o", (int)server.cfg.mask);
|
|
prompt_Printf(arg->prompt, "%s\n", server.fd == -1 ? " (not open)" : "");
|
|
} else if (server.cfg.port != 0)
|
|
prompt_Printf(arg->prompt, "TCP port %d%s\n", server.cfg.port,
|
|
server.fd == -1 ? " (not open)" : "");
|
|
else
|
|
prompt_Printf(arg->prompt, "none\n");
|
|
|
|
prompt_Printf(arg->prompt, " Choked Timer: %ds\n",
|
|
arg->bundle->cfg.choked.timeout);
|
|
|
|
#ifndef NORADIUS
|
|
radius_Show(&arg->bundle->radius, arg->prompt);
|
|
#endif
|
|
|
|
prompt_Printf(arg->prompt, " Idle Timer: ");
|
|
if (arg->bundle->cfg.idle.timeout) {
|
|
prompt_Printf(arg->prompt, "%ds", arg->bundle->cfg.idle.timeout);
|
|
if (arg->bundle->cfg.idle.min_timeout)
|
|
prompt_Printf(arg->prompt, ", min %ds",
|
|
arg->bundle->cfg.idle.min_timeout);
|
|
remaining = bundle_RemainingIdleTime(arg->bundle);
|
|
if (remaining != -1)
|
|
prompt_Printf(arg->prompt, " (%ds remaining)", remaining);
|
|
prompt_Printf(arg->prompt, "\n");
|
|
} else
|
|
prompt_Printf(arg->prompt, "disabled\n");
|
|
|
|
prompt_Printf(arg->prompt, " Filter Decap: %-20.20s",
|
|
optval(arg->bundle, OPT_FILTERDECAP));
|
|
prompt_Printf(arg->prompt, " ID check: %s\n",
|
|
optval(arg->bundle, OPT_IDCHECK));
|
|
prompt_Printf(arg->prompt, " Iface-Alias: %-20.20s",
|
|
optval(arg->bundle, OPT_IFACEALIAS));
|
|
#ifndef NOINET6
|
|
prompt_Printf(arg->prompt, " IPCP: %s\n",
|
|
optval(arg->bundle, OPT_IPCP));
|
|
prompt_Printf(arg->prompt, " IPV6CP: %-20.20s",
|
|
optval(arg->bundle, OPT_IPV6CP));
|
|
#endif
|
|
prompt_Printf(arg->prompt, " Keep-Session: %s\n",
|
|
optval(arg->bundle, OPT_KEEPSESSION));
|
|
prompt_Printf(arg->prompt, " Loopback: %-20.20s",
|
|
optval(arg->bundle, OPT_LOOPBACK));
|
|
prompt_Printf(arg->prompt, " PasswdAuth: %s\n",
|
|
optval(arg->bundle, OPT_PASSWDAUTH));
|
|
prompt_Printf(arg->prompt, " Proxy: %-20.20s",
|
|
optval(arg->bundle, OPT_PROXY));
|
|
prompt_Printf(arg->prompt, " Proxyall: %s\n",
|
|
optval(arg->bundle, OPT_PROXYALL));
|
|
prompt_Printf(arg->prompt, " Sticky Routes: %-20.20s",
|
|
optval(arg->bundle, OPT_SROUTES));
|
|
prompt_Printf(arg->prompt, " TCPMSS Fixup: %s\n",
|
|
optval(arg->bundle, OPT_TCPMSSFIXUP));
|
|
prompt_Printf(arg->prompt, " Throughput: %-20.20s",
|
|
optval(arg->bundle, OPT_THROUGHPUT));
|
|
prompt_Printf(arg->prompt, " Utmp Logging: %s\n",
|
|
optval(arg->bundle, OPT_UTMP));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
bundle_IdleTimeout(void *v)
|
|
{
|
|
struct bundle *bundle = (struct bundle *)v;
|
|
|
|
log_Printf(LogPHASE, "Idle timer expired\n");
|
|
bundle_StopIdleTimer(bundle);
|
|
bundle_Close(bundle, NULL, CLOSE_STAYDOWN);
|
|
}
|
|
|
|
/*
|
|
* Start Idle timer. If timeout is reached, we call bundle_Close() to
|
|
* close LCP and link.
|
|
*/
|
|
void
|
|
bundle_StartIdleTimer(struct bundle *bundle, unsigned secs)
|
|
{
|
|
timer_Stop(&bundle->idle.timer);
|
|
if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) !=
|
|
bundle->phys_type.open && bundle->cfg.idle.timeout) {
|
|
time_t now = time(NULL);
|
|
|
|
if (secs == 0)
|
|
secs = bundle->cfg.idle.timeout;
|
|
|
|
/* We want at least `secs' */
|
|
if (bundle->cfg.idle.min_timeout > secs && bundle->upat) {
|
|
int up = now - bundle->upat;
|
|
|
|
if ((long long)bundle->cfg.idle.min_timeout - up > (long long)secs)
|
|
/* Only increase from the current `remaining' value */
|
|
secs = bundle->cfg.idle.min_timeout - up;
|
|
}
|
|
bundle->idle.timer.func = bundle_IdleTimeout;
|
|
bundle->idle.timer.name = "idle";
|
|
bundle->idle.timer.load = secs * SECTICKS;
|
|
bundle->idle.timer.arg = bundle;
|
|
timer_Start(&bundle->idle.timer);
|
|
bundle->idle.done = now + secs;
|
|
}
|
|
}
|
|
|
|
void
|
|
bundle_SetIdleTimer(struct bundle *bundle, int timeout, int min_timeout)
|
|
{
|
|
bundle->cfg.idle.timeout = timeout;
|
|
if (min_timeout >= 0)
|
|
bundle->cfg.idle.min_timeout = min_timeout;
|
|
if (ncp_LayersOpen(&bundle->ncp))
|
|
bundle_StartIdleTimer(bundle, 0);
|
|
}
|
|
|
|
void
|
|
bundle_StopIdleTimer(struct bundle *bundle)
|
|
{
|
|
timer_Stop(&bundle->idle.timer);
|
|
bundle->idle.done = 0;
|
|
}
|
|
|
|
static int
|
|
bundle_RemainingIdleTime(struct bundle *bundle)
|
|
{
|
|
if (bundle->idle.done)
|
|
return bundle->idle.done - time(NULL);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
bundle_IsDead(struct bundle *bundle)
|
|
{
|
|
return !bundle->links || (bundle->phase == PHASE_DEAD && bundle->CleaningUp);
|
|
}
|
|
|
|
static struct datalink *
|
|
bundle_DatalinkLinkout(struct bundle *bundle, struct datalink *dl)
|
|
{
|
|
struct datalink **dlp;
|
|
|
|
for (dlp = &bundle->links; *dlp; dlp = &(*dlp)->next)
|
|
if (*dlp == dl) {
|
|
*dlp = dl->next;
|
|
dl->next = NULL;
|
|
bundle_LinksRemoved(bundle);
|
|
return dl;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
bundle_DatalinkLinkin(struct bundle *bundle, struct datalink *dl)
|
|
{
|
|
struct datalink **dlp = &bundle->links;
|
|
|
|
while (*dlp)
|
|
dlp = &(*dlp)->next;
|
|
|
|
*dlp = dl;
|
|
dl->next = NULL;
|
|
|
|
bundle_LinkAdded(bundle, dl);
|
|
mp_CheckAutoloadTimer(&bundle->ncp.mp);
|
|
}
|
|
|
|
void
|
|
bundle_CleanDatalinks(struct bundle *bundle)
|
|
{
|
|
struct datalink **dlp = &bundle->links;
|
|
int found = 0;
|
|
|
|
while (*dlp)
|
|
if ((*dlp)->state == DATALINK_CLOSED &&
|
|
(*dlp)->physical->type &
|
|
(PHYS_DIRECT|PHYS_BACKGROUND|PHYS_FOREGROUND)) {
|
|
*dlp = datalink_Destroy(*dlp);
|
|
found++;
|
|
} else
|
|
dlp = &(*dlp)->next;
|
|
|
|
if (found)
|
|
bundle_LinksRemoved(bundle);
|
|
}
|
|
|
|
int
|
|
bundle_DatalinkClone(struct bundle *bundle, struct datalink *dl,
|
|
const char *name)
|
|
{
|
|
if (bundle2datalink(bundle, name)) {
|
|
log_Printf(LogWARN, "Clone: %s: name already exists\n", name);
|
|
return 0;
|
|
}
|
|
|
|
bundle_DatalinkLinkin(bundle, datalink_Clone(dl, name));
|
|
return 1;
|
|
}
|
|
|
|
void
|
|
bundle_DatalinkRemove(struct bundle *bundle, struct datalink *dl)
|
|
{
|
|
dl = bundle_DatalinkLinkout(bundle, dl);
|
|
if (dl)
|
|
datalink_Destroy(dl);
|
|
}
|
|
|
|
void
|
|
bundle_SetLabel(struct bundle *bundle, const char *label)
|
|
{
|
|
if (label)
|
|
strncpy(bundle->cfg.label, label, sizeof bundle->cfg.label - 1);
|
|
else
|
|
*bundle->cfg.label = '\0';
|
|
}
|
|
|
|
const char *
|
|
bundle_GetLabel(struct bundle *bundle)
|
|
{
|
|
return *bundle->cfg.label ? bundle->cfg.label : NULL;
|
|
}
|
|
|
|
int
|
|
bundle_LinkSize()
|
|
{
|
|
struct iovec iov[SCATTER_SEGMENTS];
|
|
int niov, expect, f;
|
|
|
|
iov[0].iov_len = strlen(Version) + 1;
|
|
iov[0].iov_base = NULL;
|
|
niov = 1;
|
|
if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) {
|
|
log_Printf(LogERROR, "Cannot determine space required for link\n");
|
|
return 0;
|
|
}
|
|
|
|
for (f = expect = 0; f < niov; f++)
|
|
expect += iov[f].iov_len;
|
|
|
|
return expect;
|
|
}
|
|
|
|
void
|
|
bundle_ReceiveDatalink(struct bundle *bundle, int s)
|
|
{
|
|
char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int) * SEND_MAXFD];
|
|
int niov, expect, f, *fd, nfd, onfd, got;
|
|
struct iovec iov[SCATTER_SEGMENTS];
|
|
struct cmsghdr *cmsg;
|
|
struct msghdr msg;
|
|
struct datalink *dl;
|
|
pid_t pid;
|
|
|
|
log_Printf(LogPHASE, "Receiving datalink\n");
|
|
|
|
/*
|
|
* Create our scatter/gather array - passing NULL gets the space
|
|
* allocation requirement rather than actually flattening the
|
|
* structures.
|
|
*/
|
|
iov[0].iov_len = strlen(Version) + 1;
|
|
iov[0].iov_base = NULL;
|
|
niov = 1;
|
|
if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) {
|
|
log_Printf(LogERROR, "Cannot determine space required for link\n");
|
|
return;
|
|
}
|
|
|
|
/* Allocate the scatter/gather array for recvmsg() */
|
|
for (f = expect = 0; f < niov; f++) {
|
|
if ((iov[f].iov_base = malloc(iov[f].iov_len)) == NULL) {
|
|
log_Printf(LogERROR, "Cannot allocate space to receive link\n");
|
|
return;
|
|
}
|
|
if (f)
|
|
expect += iov[f].iov_len;
|
|
}
|
|
|
|
/* Set up our message */
|
|
cmsg = (struct cmsghdr *)cmsgbuf;
|
|
cmsg->cmsg_len = sizeof cmsgbuf;
|
|
cmsg->cmsg_level = SOL_SOCKET;
|
|
cmsg->cmsg_type = 0;
|
|
|
|
memset(&msg, '\0', sizeof msg);
|
|
msg.msg_name = NULL;
|
|
msg.msg_namelen = 0;
|
|
msg.msg_iov = iov;
|
|
msg.msg_iovlen = 1; /* Only send the version at the first pass */
|
|
msg.msg_control = cmsgbuf;
|
|
msg.msg_controllen = sizeof cmsgbuf;
|
|
|
|
log_Printf(LogDEBUG, "Expecting %u scatter/gather bytes\n",
|
|
(unsigned)iov[0].iov_len);
|
|
|
|
if ((got = recvmsg(s, &msg, MSG_WAITALL)) != iov[0].iov_len) {
|
|
if (got == -1)
|
|
log_Printf(LogERROR, "Failed recvmsg: %s\n", strerror(errno));
|
|
else
|
|
log_Printf(LogERROR, "Failed recvmsg: Got %d, not %u\n",
|
|
got, (unsigned)iov[0].iov_len);
|
|
while (niov--)
|
|
free(iov[niov].iov_base);
|
|
return;
|
|
}
|
|
|
|
if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) {
|
|
log_Printf(LogERROR, "Recvmsg: no descriptors received !\n");
|
|
while (niov--)
|
|
free(iov[niov].iov_base);
|
|
return;
|
|
}
|
|
|
|
fd = (int *)CMSG_DATA(cmsg);
|
|
nfd = ((caddr_t)cmsg + cmsg->cmsg_len - (caddr_t)fd) / sizeof(int);
|
|
|
|
if (nfd < 2) {
|
|
log_Printf(LogERROR, "Recvmsg: %d descriptor%s received (too few) !\n",
|
|
nfd, nfd == 1 ? "" : "s");
|
|
while (nfd--)
|
|
close(fd[nfd]);
|
|
while (niov--)
|
|
free(iov[niov].iov_base);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* We've successfully received two or more open file descriptors
|
|
* through our socket, plus a version string. Make sure it's the
|
|
* correct version, and drop the connection if it's not.
|
|
*/
|
|
if (strncmp(Version, iov[0].iov_base, iov[0].iov_len)) {
|
|
log_Printf(LogWARN, "Cannot receive datalink, incorrect version"
|
|
" (\"%.*s\", not \"%s\")\n", (int)iov[0].iov_len,
|
|
(char *)iov[0].iov_base, Version);
|
|
while (nfd--)
|
|
close(fd[nfd]);
|
|
while (niov--)
|
|
free(iov[niov].iov_base);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Everything looks good. Send the other side our process id so that
|
|
* they can transfer lock ownership, and wait for them to send the
|
|
* actual link data.
|
|
*/
|
|
pid = getpid();
|
|
if ((got = write(fd[1], &pid, sizeof pid)) != sizeof pid) {
|
|
if (got == -1)
|
|
log_Printf(LogERROR, "Failed write: %s\n", strerror(errno));
|
|
else
|
|
log_Printf(LogERROR, "Failed write: Got %d, not %d\n", got,
|
|
(int)(sizeof pid));
|
|
while (nfd--)
|
|
close(fd[nfd]);
|
|
while (niov--)
|
|
free(iov[niov].iov_base);
|
|
return;
|
|
}
|
|
|
|
if ((got = readv(fd[1], iov + 1, niov - 1)) != expect) {
|
|
if (got == -1)
|
|
log_Printf(LogERROR, "Failed write: %s\n", strerror(errno));
|
|
else
|
|
log_Printf(LogERROR, "Failed write: Got %d, not %d\n", got, expect);
|
|
while (nfd--)
|
|
close(fd[nfd]);
|
|
while (niov--)
|
|
free(iov[niov].iov_base);
|
|
return;
|
|
}
|
|
close(fd[1]);
|
|
|
|
onfd = nfd; /* We've got this many in our array */
|
|
nfd -= 2; /* Don't include p->fd and our reply descriptor */
|
|
niov = 1; /* Skip the version id */
|
|
dl = iov2datalink(bundle, iov, &niov, sizeof iov / sizeof *iov, fd[0],
|
|
fd + 2, &nfd);
|
|
if (dl) {
|
|
|
|
if (nfd) {
|
|
log_Printf(LogERROR, "bundle_ReceiveDatalink: Failed to handle %d "
|
|
"auxiliary file descriptors (%d remain)\n", onfd, nfd);
|
|
datalink_Destroy(dl);
|
|
while (nfd--)
|
|
close(fd[onfd--]);
|
|
close(fd[0]);
|
|
} else {
|
|
bundle_DatalinkLinkin(bundle, dl);
|
|
datalink_AuthOk(dl);
|
|
bundle_CalculateBandwidth(dl->bundle);
|
|
}
|
|
} else {
|
|
while (nfd--)
|
|
close(fd[onfd--]);
|
|
close(fd[0]);
|
|
close(fd[1]);
|
|
}
|
|
|
|
free(iov[0].iov_base);
|
|
}
|
|
|
|
void
|
|
bundle_SendDatalink(struct datalink *dl, int s, struct sockaddr_un *sun)
|
|
{
|
|
char cmsgbuf[CMSG_SPACE(sizeof(int) * SEND_MAXFD)];
|
|
const char *constlock;
|
|
char *lock;
|
|
struct cmsghdr *cmsg;
|
|
struct msghdr msg;
|
|
struct iovec iov[SCATTER_SEGMENTS];
|
|
int niov, f, expect, newsid, fd[SEND_MAXFD], nfd, reply[2], got;
|
|
pid_t newpid;
|
|
|
|
log_Printf(LogPHASE, "Transmitting datalink %s\n", dl->name);
|
|
|
|
/* Record the base device name for a lock transfer later */
|
|
constlock = physical_LockedDevice(dl->physical);
|
|
if (constlock) {
|
|
lock = alloca(strlen(constlock) + 1);
|
|
strcpy(lock, constlock);
|
|
} else
|
|
lock = NULL;
|
|
|
|
bundle_LinkClosed(dl->bundle, dl);
|
|
bundle_DatalinkLinkout(dl->bundle, dl);
|
|
|
|
/* Build our scatter/gather array */
|
|
iov[0].iov_len = strlen(Version) + 1;
|
|
iov[0].iov_base = strdup(Version);
|
|
niov = 1;
|
|
nfd = 0;
|
|
|
|
fd[0] = datalink2iov(dl, iov, &niov, SCATTER_SEGMENTS, fd + 2, &nfd);
|
|
|
|
if (fd[0] != -1 && socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, reply) != -1) {
|
|
/*
|
|
* fd[1] is used to get the peer process id back, then to confirm that
|
|
* we've transferred any device locks to that process id.
|
|
*/
|
|
fd[1] = reply[1];
|
|
|
|
nfd += 2; /* Include fd[0] and fd[1] */
|
|
memset(&msg, '\0', sizeof msg);
|
|
|
|
msg.msg_name = NULL;
|
|
msg.msg_namelen = 0;
|
|
/*
|
|
* Only send the version to start... We used to send the whole lot, but
|
|
* this caused problems with our RECVBUF size as a single link is about
|
|
* 22k ! This way, we should bump into no limits.
|
|
*/
|
|
msg.msg_iovlen = 1;
|
|
msg.msg_iov = iov;
|
|
msg.msg_control = cmsgbuf;
|
|
msg.msg_controllen = CMSG_SPACE(sizeof(int) * nfd);
|
|
msg.msg_flags = 0;
|
|
|
|
cmsg = (struct cmsghdr *)cmsgbuf;
|
|
cmsg->cmsg_len = msg.msg_controllen;
|
|
cmsg->cmsg_level = SOL_SOCKET;
|
|
cmsg->cmsg_type = SCM_RIGHTS;
|
|
|
|
for (f = 0; f < nfd; f++)
|
|
*((int *)CMSG_DATA(cmsg) + f) = fd[f];
|
|
|
|
for (f = 1, expect = 0; f < niov; f++)
|
|
expect += iov[f].iov_len;
|
|
|
|
if (setsockopt(reply[0], SOL_SOCKET, SO_SNDBUF, &expect, sizeof(int)) == -1)
|
|
log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect,
|
|
strerror(errno));
|
|
if (setsockopt(reply[1], SOL_SOCKET, SO_RCVBUF, &expect, sizeof(int)) == -1)
|
|
log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect,
|
|
strerror(errno));
|
|
|
|
log_Printf(LogDEBUG, "Sending %d descriptor%s and %u bytes in scatter"
|
|
"/gather array\n", nfd, nfd == 1 ? "" : "s",
|
|
(unsigned)iov[0].iov_len);
|
|
|
|
if ((got = sendmsg(s, &msg, 0)) == -1)
|
|
log_Printf(LogERROR, "Failed sendmsg: %s: %s\n",
|
|
sun->sun_path, strerror(errno));
|
|
else if (got != iov[0].iov_len)
|
|
log_Printf(LogERROR, "%s: Failed initial sendmsg: Only sent %d of %u\n",
|
|
sun->sun_path, got, (unsigned)iov[0].iov_len);
|
|
else {
|
|
/* We must get the ACK before closing the descriptor ! */
|
|
int res;
|
|
|
|
if ((got = read(reply[0], &newpid, sizeof newpid)) == sizeof newpid) {
|
|
log_Printf(LogDEBUG, "Received confirmation from pid %d\n",
|
|
(int)newpid);
|
|
if (lock && (res = ID0uu_lock_txfr(lock, newpid)) != UU_LOCK_OK)
|
|
log_Printf(LogERROR, "uu_lock_txfr: %s\n", uu_lockerr(res));
|
|
|
|
log_Printf(LogDEBUG, "Transmitting link (%d bytes)\n", expect);
|
|
if ((got = writev(reply[0], iov + 1, niov - 1)) != expect) {
|
|
if (got == -1)
|
|
log_Printf(LogERROR, "%s: Failed writev: %s\n",
|
|
sun->sun_path, strerror(errno));
|
|
else
|
|
log_Printf(LogERROR, "%s: Failed writev: Wrote %d of %d\n",
|
|
sun->sun_path, got, expect);
|
|
}
|
|
} else if (got == -1)
|
|
log_Printf(LogERROR, "%s: Failed socketpair read: %s\n",
|
|
sun->sun_path, strerror(errno));
|
|
else
|
|
log_Printf(LogERROR, "%s: Failed socketpair read: Got %d of %d\n",
|
|
sun->sun_path, got, (int)(sizeof newpid));
|
|
}
|
|
|
|
close(reply[0]);
|
|
close(reply[1]);
|
|
|
|
newsid = Enabled(dl->bundle, OPT_KEEPSESSION) ||
|
|
tcgetpgrp(fd[0]) == getpgrp();
|
|
while (nfd)
|
|
close(fd[--nfd]);
|
|
if (newsid)
|
|
bundle_setsid(dl->bundle, got != -1);
|
|
}
|
|
close(s);
|
|
|
|
while (niov--)
|
|
free(iov[niov].iov_base);
|
|
}
|
|
|
|
int
|
|
bundle_RenameDatalink(struct bundle *bundle, struct datalink *ndl,
|
|
const char *name)
|
|
{
|
|
struct datalink *dl;
|
|
|
|
if (!strcasecmp(ndl->name, name))
|
|
return 1;
|
|
|
|
for (dl = bundle->links; dl; dl = dl->next)
|
|
if (!strcasecmp(dl->name, name))
|
|
return 0;
|
|
|
|
datalink_Rename(ndl, name);
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
bundle_SetMode(struct bundle *bundle, struct datalink *dl, int mode)
|
|
{
|
|
int omode;
|
|
|
|
omode = dl->physical->type;
|
|
if (omode == mode)
|
|
return 1;
|
|
|
|
if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO))
|
|
/* First auto link */
|
|
if (bundle->ncp.ipcp.peer_ip.s_addr == INADDR_ANY) {
|
|
log_Printf(LogWARN, "You must `set ifaddr' or `open' before"
|
|
" changing mode to %s\n", mode2Nam(mode));
|
|
return 0;
|
|
}
|
|
|
|
if (!datalink_SetMode(dl, mode))
|
|
return 0;
|
|
|
|
if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO) &&
|
|
bundle->phase != PHASE_NETWORK)
|
|
/* First auto link, we need an interface */
|
|
ipcp_InterfaceUp(&bundle->ncp.ipcp);
|
|
|
|
/* Regenerate phys_type and adjust idle timer */
|
|
bundle_LinksRemoved(bundle);
|
|
|
|
return 1;
|
|
}
|
|
|
|
void
|
|
bundle_setsid(struct bundle *bundle, int holdsession)
|
|
{
|
|
/*
|
|
* Lose the current session. This means getting rid of our pid
|
|
* too so that the tty device will really go away, and any getty
|
|
* etc will be allowed to restart.
|
|
*/
|
|
pid_t pid, orig;
|
|
int fds[2];
|
|
char done;
|
|
struct datalink *dl;
|
|
|
|
if (!holdsession && bundle_IsDead(bundle)) {
|
|
/*
|
|
* No need to lose our session after all... we're going away anyway
|
|
*
|
|
* We should really stop the timer and pause if holdsession is set and
|
|
* the bundle's dead, but that leaves other resources lying about :-(
|
|
*/
|
|
return;
|
|
}
|
|
|
|
orig = getpid();
|
|
if (pipe(fds) == -1) {
|
|
log_Printf(LogERROR, "pipe: %s\n", strerror(errno));
|
|
return;
|
|
}
|
|
switch ((pid = fork())) {
|
|
case -1:
|
|
log_Printf(LogERROR, "fork: %s\n", strerror(errno));
|
|
close(fds[0]);
|
|
close(fds[1]);
|
|
return;
|
|
case 0:
|
|
close(fds[1]);
|
|
read(fds[0], &done, 1); /* uu_locks are mine ! */
|
|
close(fds[0]);
|
|
if (pipe(fds) == -1) {
|
|
log_Printf(LogERROR, "pipe(2): %s\n", strerror(errno));
|
|
return;
|
|
}
|
|
switch ((pid = fork())) {
|
|
case -1:
|
|
log_Printf(LogERROR, "fork(2): %s\n", strerror(errno));
|
|
close(fds[0]);
|
|
close(fds[1]);
|
|
return;
|
|
case 0:
|
|
close(fds[1]);
|
|
bundle_LockTun(bundle); /* update pid */
|
|
read(fds[0], &done, 1); /* uu_locks are mine ! */
|
|
close(fds[0]);
|
|
setsid();
|
|
bundle_ChangedPID(bundle);
|
|
log_Printf(LogDEBUG, "%d -> %d: %s session control\n",
|
|
(int)orig, (int)getpid(),
|
|
holdsession ? "Passed" : "Dropped");
|
|
timer_InitService(0); /* Start the Timer Service */
|
|
break;
|
|
default:
|
|
close(fds[0]);
|
|
/* Give away all our physical locks (to the final process) */
|
|
for (dl = bundle->links; dl; dl = dl->next)
|
|
if (dl->state != DATALINK_CLOSED)
|
|
physical_ChangedPid(dl->physical, pid);
|
|
write(fds[1], "!", 1); /* done */
|
|
close(fds[1]);
|
|
_exit(0);
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
close(fds[0]);
|
|
/* Give away all our physical locks (to the intermediate process) */
|
|
for (dl = bundle->links; dl; dl = dl->next)
|
|
if (dl->state != DATALINK_CLOSED)
|
|
physical_ChangedPid(dl->physical, pid);
|
|
write(fds[1], "!", 1); /* done */
|
|
close(fds[1]);
|
|
if (holdsession) {
|
|
int fd, status;
|
|
|
|
timer_TermService();
|
|
signal(SIGPIPE, SIG_DFL);
|
|
signal(SIGALRM, SIG_DFL);
|
|
signal(SIGHUP, SIG_DFL);
|
|
signal(SIGTERM, SIG_DFL);
|
|
signal(SIGINT, SIG_DFL);
|
|
signal(SIGQUIT, SIG_DFL);
|
|
for (fd = getdtablesize(); fd >= 0; fd--)
|
|
close(fd);
|
|
/*
|
|
* Reap the intermediate process. As we're not exiting but the
|
|
* intermediate is, we don't want it to become defunct.
|
|
*/
|
|
waitpid(pid, &status, 0);
|
|
/* Tweak our process arguments.... */
|
|
SetTitle("session owner");
|
|
#ifndef NOSUID
|
|
setuid(ID0realuid());
|
|
#endif
|
|
/*
|
|
* Hang around for a HUP. This should happen as soon as the
|
|
* ppp that we passed our ctty descriptor to closes it.
|
|
* NOTE: If this process dies, the passed descriptor becomes
|
|
* invalid and will give a select() error by setting one
|
|
* of the error fds, aborting the other ppp. We don't
|
|
* want that to happen !
|
|
*/
|
|
pause();
|
|
}
|
|
_exit(0);
|
|
break;
|
|
}
|
|
}
|
|
|
|
int
|
|
bundle_HighestState(struct bundle *bundle)
|
|
{
|
|
struct datalink *dl;
|
|
int result = DATALINK_CLOSED;
|
|
|
|
for (dl = bundle->links; dl; dl = dl->next)
|
|
if (result < dl->state)
|
|
result = dl->state;
|
|
|
|
return result;
|
|
}
|
|
|
|
int
|
|
bundle_Exception(struct bundle *bundle, int fd)
|
|
{
|
|
struct datalink *dl;
|
|
|
|
for (dl = bundle->links; dl; dl = dl->next)
|
|
if (dl->physical->fd == fd) {
|
|
datalink_Down(dl, CLOSE_NORMAL);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
bundle_AdjustFilters(struct bundle *bundle, struct ncpaddr *local,
|
|
struct ncpaddr *remote)
|
|
{
|
|
filter_AdjustAddr(&bundle->filter.in, local, remote, NULL);
|
|
filter_AdjustAddr(&bundle->filter.out, local, remote, NULL);
|
|
filter_AdjustAddr(&bundle->filter.dial, local, remote, NULL);
|
|
filter_AdjustAddr(&bundle->filter.alive, local, remote, NULL);
|
|
}
|
|
|
|
void
|
|
bundle_AdjustDNS(struct bundle *bundle)
|
|
{
|
|
struct in_addr *dns = bundle->ncp.ipcp.ns.dns;
|
|
|
|
filter_AdjustAddr(&bundle->filter.in, NULL, NULL, dns);
|
|
filter_AdjustAddr(&bundle->filter.out, NULL, NULL, dns);
|
|
filter_AdjustAddr(&bundle->filter.dial, NULL, NULL, dns);
|
|
filter_AdjustAddr(&bundle->filter.alive, NULL, NULL, dns);
|
|
}
|
|
|
|
void
|
|
bundle_CalculateBandwidth(struct bundle *bundle)
|
|
{
|
|
struct datalink *dl;
|
|
int sp, overhead, maxoverhead;
|
|
|
|
bundle->bandwidth = 0;
|
|
bundle->iface->mtu = 0;
|
|
maxoverhead = 0;
|
|
|
|
for (dl = bundle->links; dl; dl = dl->next) {
|
|
overhead = ccp_MTUOverhead(&dl->physical->link.ccp);
|
|
if (maxoverhead < overhead)
|
|
maxoverhead = overhead;
|
|
if (dl->state == DATALINK_OPEN) {
|
|
if ((sp = dl->mp.bandwidth) == 0 &&
|
|
(sp = physical_GetSpeed(dl->physical)) == 0)
|
|
log_Printf(LogDEBUG, "%s: %s: Cannot determine bandwidth\n",
|
|
dl->name, dl->physical->name.full);
|
|
else
|
|
bundle->bandwidth += sp;
|
|
if (!bundle->ncp.mp.active) {
|
|
bundle->iface->mtu = dl->physical->link.lcp.his_mru;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if(bundle->bandwidth == 0)
|
|
bundle->bandwidth = 115200; /* Shrug */
|
|
|
|
if (bundle->ncp.mp.active) {
|
|
bundle->iface->mtu = bundle->ncp.mp.peer_mrru;
|
|
overhead = ccp_MTUOverhead(&bundle->ncp.mp.link.ccp);
|
|
if (maxoverhead < overhead)
|
|
maxoverhead = overhead;
|
|
} else if (!bundle->iface->mtu)
|
|
bundle->iface->mtu = DEF_MRU;
|
|
|
|
#ifndef NORADIUS
|
|
if (bundle->radius.valid && bundle->radius.mtu &&
|
|
bundle->radius.mtu < bundle->iface->mtu) {
|
|
log_Printf(LogLCP, "Reducing MTU to radius value %lu\n",
|
|
bundle->radius.mtu);
|
|
bundle->iface->mtu = bundle->radius.mtu;
|
|
}
|
|
#endif
|
|
|
|
if (maxoverhead) {
|
|
log_Printf(LogLCP, "Reducing MTU from %d to %d (CCP requirement)\n",
|
|
bundle->iface->mtu, bundle->iface->mtu - maxoverhead);
|
|
bundle->iface->mtu -= maxoverhead;
|
|
}
|
|
|
|
tun_configure(bundle);
|
|
|
|
route_UpdateMTU(bundle);
|
|
}
|
|
|
|
void
|
|
bundle_AutoAdjust(struct bundle *bundle, int percent, int what)
|
|
{
|
|
struct datalink *dl, *choice, *otherlinkup;
|
|
|
|
choice = otherlinkup = NULL;
|
|
for (dl = bundle->links; dl; dl = dl->next)
|
|
if (dl->physical->type == PHYS_AUTO) {
|
|
if (dl->state == DATALINK_OPEN) {
|
|
if (what == AUTO_DOWN) {
|
|
if (choice)
|
|
otherlinkup = choice;
|
|
choice = dl;
|
|
}
|
|
} else if (dl->state == DATALINK_CLOSED) {
|
|
if (what == AUTO_UP) {
|
|
choice = dl;
|
|
break;
|
|
}
|
|
} else {
|
|
/* An auto link in an intermediate state - forget it for the moment */
|
|
choice = NULL;
|
|
break;
|
|
}
|
|
} else if (dl->state == DATALINK_OPEN && what == AUTO_DOWN)
|
|
otherlinkup = dl;
|
|
|
|
if (choice) {
|
|
if (what == AUTO_UP) {
|
|
log_Printf(LogPHASE, "%d%% saturation -> Opening link ``%s''\n",
|
|
percent, choice->name);
|
|
datalink_Up(choice, 1, 1);
|
|
mp_CheckAutoloadTimer(&bundle->ncp.mp);
|
|
} else if (otherlinkup) { /* Only bring the second-last link down */
|
|
log_Printf(LogPHASE, "%d%% saturation -> Closing link ``%s''\n",
|
|
percent, choice->name);
|
|
datalink_Close(choice, CLOSE_STAYDOWN);
|
|
mp_CheckAutoloadTimer(&bundle->ncp.mp);
|
|
}
|
|
}
|
|
}
|
|
|
|
int
|
|
bundle_WantAutoloadTimer(struct bundle *bundle)
|
|
{
|
|
struct datalink *dl;
|
|
int autolink, opened;
|
|
|
|
if (bundle->phase == PHASE_NETWORK) {
|
|
for (autolink = opened = 0, dl = bundle->links; dl; dl = dl->next)
|
|
if (dl->physical->type == PHYS_AUTO) {
|
|
if (++autolink == 2 || (autolink == 1 && opened))
|
|
/* Two auto links or one auto and one open in NETWORK phase */
|
|
return 1;
|
|
} else if (dl->state == DATALINK_OPEN) {
|
|
opened++;
|
|
if (autolink)
|
|
/* One auto and one open link in NETWORK phase */
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
bundle_ChangedPID(struct bundle *bundle)
|
|
{
|
|
#ifdef TUNSIFPID
|
|
ioctl(bundle->dev.fd, TUNSIFPID, 0);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
bundle_Uptime(struct bundle *bundle)
|
|
{
|
|
if (bundle->upat)
|
|
return time(NULL) - bundle->upat;
|
|
|
|
return 0;
|
|
}
|