2 * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/usr.sbin/ppp/bundle.c,v 1.84.2.12 2002/09/01 02:12:22 brian Exp $
29 #include <sys/param.h>
30 #include <sys/socket.h>
31 #include <netinet/in.h>
33 #include <net/tun/if_tun.h> /* For TUNS* ioctls */
34 #include <net/route.h>
35 #include <netinet/in_systm.h>
36 #include <netinet/ip.h>
67 #include "throughput.h"
68 #include "slcompress.h"
73 #include "descriptor.h"
102 #define SCATTER_SEGMENTS 7 /* version, datalink, name, physical,
103 throughput, throughput, device */
105 #define SEND_MAXFD 3 /* Max file descriptors passed through
106 the local domain socket */
108 static int bundle_RemainingIdleTime(struct bundle *);
110 static const char * const PhaseNames[] = {
111 "Dead", "Establish", "Authenticate", "Network", "Terminate"
115 bundle_PhaseName(struct bundle *bundle)
117 return bundle->phase <= PHASE_TERMINATE ?
118 PhaseNames[bundle->phase] : "unknown";
122 bundle_NewPhase(struct bundle *bundle, u_int new)
124 if (new == bundle->phase)
127 if (new <= PHASE_TERMINATE)
128 log_Printf(LogPHASE, "bundle: %s\n", PhaseNames[new]);
134 MPPE_MasterKeyValid = 0;
136 log_DisplayPrompts();
139 case PHASE_ESTABLISH:
143 case PHASE_AUTHENTICATE:
145 log_DisplayPrompts();
149 if (ncp_fsmStart(&bundle->ncp, bundle)) {
151 log_DisplayPrompts();
153 log_Printf(LogPHASE, "bundle: All NCPs are disabled\n");
154 bundle_Close(bundle, NULL, CLOSE_STAYDOWN);
158 case PHASE_TERMINATE:
160 mp_Down(&bundle->ncp.mp);
161 log_DisplayPrompts();
167 bundle_LayerStart(void *v __unused, struct fsm *fp __unused)
169 /* The given FSM is about to start up ! */
174 bundle_Notify(struct bundle *bundle, char c)
176 if (bundle->notify.fd != -1) {
179 ret = write(bundle->notify.fd, &c, 1);
180 if (c != EX_REDIAL && c != EX_RECONNECT) {
182 log_Printf(LogCHAT, "Parent notified of %s\n",
183 c == EX_NORMAL ? "success" : "failure");
185 log_Printf(LogERROR, "Failed to notify parent of success\n");
186 close(bundle->notify.fd);
187 bundle->notify.fd = -1;
189 log_Printf(LogCHAT, "Parent notified of %s\n", ex_desc(c));
191 log_Printf(LogERROR, "Failed to notify parent of %s\n", ex_desc(c));
196 bundle_ClearQueues(void *v)
198 struct bundle *bundle = (struct bundle *)v;
201 log_Printf(LogPHASE, "Clearing choked output queue\n");
202 timer_Stop(&bundle->choked.timer);
207 * We've had a full queue for PACKET_DEL_SECS seconds without being
208 * able to get rid of any of the packets. We've probably given up
209 * on the redials at this point, and the queued data has almost
210 * definitely been timed out by the layer above. As this is preventing
211 * us from reading the TUN_NAME device (we don't want to buffer stuff
212 * indefinitely), we may as well nuke this data and start with a clean
215 * Unfortunately, this has the side effect of shafting any compression
216 * dictionaries in use (causing the relevant RESET_REQ/RESET_ACK).
219 ncp_DeleteQueues(&bundle->ncp);
220 for (dl = bundle->links; dl; dl = dl->next)
221 physical_DeleteQueue(dl->physical);
225 bundle_LinkAdded(struct bundle *bundle, struct datalink *dl)
227 bundle->phys_type.all |= dl->physical->type;
228 if (dl->state == DATALINK_OPEN)
229 bundle->phys_type.open |= dl->physical->type;
232 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL))
233 != bundle->phys_type.open && bundle->session.timer.state == TIMER_STOPPED)
234 if (bundle->radius.sessiontime)
235 bundle_StartSessionTimer(bundle, 0);
238 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL))
239 != bundle->phys_type.open && bundle->idle.timer.state == TIMER_STOPPED)
240 /* We may need to start our idle timer */
241 bundle_StartIdleTimer(bundle, 0);
245 bundle_LinksRemoved(struct bundle *bundle)
249 bundle->phys_type.all = bundle->phys_type.open = 0;
250 for (dl = bundle->links; dl; dl = dl->next)
251 bundle_LinkAdded(bundle, dl);
253 bundle_CalculateBandwidth(bundle);
254 mp_CheckAutoloadTimer(&bundle->ncp.mp);
256 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL))
257 == bundle->phys_type.open) {
259 if (bundle->radius.sessiontime)
260 bundle_StopSessionTimer(bundle);
262 bundle_StopIdleTimer(bundle);
267 bundle_LayerUp(void *v, struct fsm *fp)
270 * The given fsm is now up
271 * If it's an LCP, adjust our phys_mode.open value and check the
273 * If it's the first NCP, calculate our bandwidth
274 * If it's the first NCP, set our ``upat'' time
275 * If it's the first NCP, start the idle timer.
276 * If it's an NCP, tell our -background parent to go away.
277 * If it's the first NCP, start the autoload timer
279 struct bundle *bundle = (struct bundle *)v;
281 if (fp->proto == PROTO_LCP) {
282 struct physical *p = link2physical(fp->link);
284 bundle_LinkAdded(bundle, p->dl);
285 mp_CheckAutoloadTimer(&bundle->ncp.mp);
286 } else if (isncp(fp->proto)) {
287 if (ncp_LayersOpen(&fp->bundle->ncp) == 1) {
288 bundle_CalculateBandwidth(fp->bundle);
291 if (bundle->radius.sessiontime)
292 bundle_StartSessionTimer(bundle, 0);
294 bundle_StartIdleTimer(bundle, 0);
295 mp_CheckAutoloadTimer(&fp->bundle->ncp.mp);
297 bundle_Notify(bundle, EX_NORMAL);
298 } else if (fp->proto == PROTO_CCP)
299 bundle_CalculateBandwidth(fp->bundle); /* Against ccp_MTUOverhead */
303 bundle_LayerDown(void *v, struct fsm *fp)
306 * The given FSM has been told to come down.
307 * If it's our last NCP, stop the idle timer.
308 * If it's our last NCP, clear our ``upat'' value.
309 * If it's our last NCP, stop the autoload timer
310 * If it's an LCP, adjust our phys_type.open value and any timers.
311 * If it's an LCP and we're in multilink mode, adjust our tun
312 * If it's the last LCP, down all NCPs
313 * speed and make sure our minimum sequence number is adjusted.
316 struct bundle *bundle = (struct bundle *)v;
318 if (isncp(fp->proto)) {
319 if (ncp_LayersOpen(&fp->bundle->ncp) == 0) {
321 if (bundle->radius.sessiontime)
322 bundle_StopSessionTimer(bundle);
324 bundle_StopIdleTimer(bundle);
326 mp_StopAutoloadTimer(&bundle->ncp.mp);
328 } else if (fp->proto == PROTO_LCP) {
330 struct datalink *lost;
333 bundle_LinksRemoved(bundle); /* adjust timers & phys_type values */
337 for (dl = bundle->links; dl; dl = dl->next) {
338 if (fp == &dl->physical->link.lcp.fsm)
340 else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP)
344 if (bundle->ncp.mp.active) {
345 bundle_CalculateBandwidth(bundle);
348 mp_LinkLost(&bundle->ncp.mp, lost);
350 log_Printf(LogALERT, "Oops, lost an unrecognised datalink (%s) !\n",
354 if (!others_active) {
355 /* Down the NCPs. We don't expect to get fsm_Close()d ourself ! */
356 ncp2initial(&bundle->ncp);
357 mp_Down(&bundle->ncp.mp);
363 bundle_LayerFinish(void *v, struct fsm *fp)
365 /* The given fsm is now down (fp cannot be NULL)
367 * If it's the last NCP, fsm_Close all LCPs
368 * If it's the last NCP, bring any MP layer down
371 struct bundle *bundle = (struct bundle *)v;
374 if (isncp(fp->proto) && !ncp_LayersUnfinished(&bundle->ncp)) {
375 if (bundle_Phase(bundle) != PHASE_DEAD)
376 bundle_NewPhase(bundle, PHASE_TERMINATE);
377 for (dl = bundle->links; dl; dl = dl->next)
378 if (dl->state == DATALINK_OPEN)
379 datalink_Close(dl, CLOSE_STAYDOWN);
381 mp_Down(&bundle->ncp.mp);
386 bundle_Close(struct bundle *bundle, const char *name, int how)
389 * Please close the given datalink.
390 * If name == NULL or name is the last datalink, fsm_Close all NCPs
392 * If it isn't the last datalink, just Close that datalink.
395 struct datalink *dl, *this_dl;
401 for (dl = bundle->links; dl; dl = dl->next) {
402 if (name && !strcasecmp(name, dl->name))
404 if (name == NULL || this_dl == dl) {
407 datalink_DontHangup(dl);
410 datalink_StayDown(dl);
413 } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP)
417 if (name && this_dl == NULL) {
418 log_Printf(LogWARN, "%s: Invalid datalink name\n", name);
422 if (!others_active) {
424 if (bundle->radius.sessiontime)
425 bundle_StopSessionTimer(bundle);
427 bundle_StopIdleTimer(bundle);
428 if (ncp_LayersUnfinished(&bundle->ncp))
429 ncp_Close(&bundle->ncp);
431 ncp2initial(&bundle->ncp);
432 mp_Down(&bundle->ncp.mp);
433 for (dl = bundle->links; dl; dl = dl->next)
434 datalink_Close(dl, how);
436 } else if (this_dl && this_dl->state != DATALINK_CLOSED &&
437 this_dl->state != DATALINK_HANGUP)
438 datalink_Close(this_dl, how);
442 bundle_Down(struct bundle *bundle, int how)
446 for (dl = bundle->links; dl; dl = dl->next)
447 datalink_Down(dl, how);
451 bundle_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n)
453 struct bundle *bundle = descriptor2bundle(d);
461 /* If there are aren't many packets queued, look for some more. */
462 for (nlinks = 0, dl = bundle->links; dl; dl = dl->next)
466 queued = r ? ncp_FillPhysicalQueues(&bundle->ncp, bundle) :
467 ncp_QueueLen(&bundle->ncp);
469 if (r && (bundle->phase == PHASE_NETWORK ||
470 bundle->phys_type.all & PHYS_AUTO)) {
471 /* enough surplus so that we can tell if we're getting swamped */
472 ifqueue = nlinks > bundle->cfg.ifqueue ? nlinks : bundle->cfg.ifqueue;
473 if (queued < ifqueue) {
474 /* Not enough - select() for more */
475 if (bundle->choked.timer.state == TIMER_RUNNING)
476 timer_Stop(&bundle->choked.timer); /* Not needed any more */
477 FD_SET(bundle->dev.fd, r);
478 if (*n < bundle->dev.fd + 1)
479 *n = bundle->dev.fd + 1;
480 log_Printf(LogTIMER, "%s: fdset(r) %d\n", TUN_NAME, bundle->dev.fd);
482 } else if (bundle->choked.timer.state == TIMER_STOPPED) {
483 bundle->choked.timer.func = bundle_ClearQueues;
484 bundle->choked.timer.name = "output choke";
485 bundle->choked.timer.load = bundle->cfg.choked.timeout * SECTICKS;
486 bundle->choked.timer.arg = bundle;
487 timer_Start(&bundle->choked.timer);
493 result += descriptor_UpdateSet(&bundle->radius.desc, r, w, e, n);
496 /* Which links need a select() ? */
497 for (dl = bundle->links; dl; dl = dl->next)
498 result += descriptor_UpdateSet(&dl->desc, r, w, e, n);
501 * This *MUST* be called after the datalink UpdateSet()s as it
502 * might be ``holding'' one of the datalinks (death-row) and
503 * wants to be able to de-select() it from the descriptor set.
505 result += descriptor_UpdateSet(&bundle->ncp.mp.server.desc, r, w, e, n);
511 bundle_IsSet(struct fdescriptor *d, const fd_set *fdset)
513 struct bundle *bundle = descriptor2bundle(d);
516 for (dl = bundle->links; dl; dl = dl->next)
517 if (descriptor_IsSet(&dl->desc, fdset))
521 if (descriptor_IsSet(&bundle->radius.desc, fdset))
525 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset))
528 return FD_ISSET(bundle->dev.fd, fdset);
532 bundle_DescriptorRead(struct fdescriptor *d __unused, struct bundle *bundle,
539 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset))
540 descriptor_Read(&bundle->ncp.mp.server.desc, bundle, fdset);
542 for (dl = bundle->links; dl; dl = dl->next)
543 if (descriptor_IsSet(&dl->desc, fdset))
544 descriptor_Read(&dl->desc, bundle, fdset);
547 if (descriptor_IsSet(&bundle->radius.desc, fdset))
548 descriptor_Read(&bundle->radius.desc, bundle, fdset);
551 if (FD_ISSET(bundle->dev.fd, fdset)) {
557 if (bundle->dev.header) {
558 data = (u_char *)&tun;
562 sz = sizeof tun.data;
565 /* something to read from tun */
567 n = read(bundle->dev.fd, data, sz);
569 log_Printf(LogWARN, "%s: read: %s\n", bundle->dev.Name, strerror(errno));
573 if (bundle->dev.header) {
574 n -= sz - sizeof tun.data;
576 log_Printf(LogERROR, "%s: read: Got only %d bytes of data !\n",
577 bundle->dev.Name, n);
580 af = ntohl(tun.header.family);
582 if (af != AF_INET && af != AF_INET6)
586 /* XXX: Should be maintaining drop/family counts ! */
591 if (af == AF_INET && ((struct ip *)tun.data)->ip_dst.s_addr ==
592 bundle->ncp.ipcp.my_ip.s_addr) {
593 /* we've been asked to send something addressed *to* us :( */
594 if (Enabled(bundle, OPT_LOOPBACK)) {
595 pri = PacketCheck(bundle, af, tun.data, n, &bundle->filter.in,
598 n += sz - sizeof tun.data;
599 write(bundle->dev.fd, data, n);
600 log_Printf(LogDEBUG, "Looped back packet addressed to myself\n");
604 log_Printf(LogDEBUG, "Oops - forwarding packet addressed to myself\n");
608 * Process on-demand dialup. Output packets are queued within the tunnel
609 * device until the appropriate NCP is opened.
612 if (bundle_Phase(bundle) == PHASE_DEAD) {
614 * Note, we must be in AUTO mode :-/ otherwise our interface should
615 * *not* be UP and we can't receive data
617 pri = PacketCheck(bundle, af, tun.data, n, &bundle->filter.dial,
620 bundle_Open(bundle, NULL, PHYS_AUTO, 0);
623 * Drop the packet. If we were to queue it, we'd just end up with
624 * a pile of timed-out data in our output queue by the time we get
625 * around to actually dialing. We'd also prematurely reach the
626 * threshold at which we stop select()ing to read() the tun
627 * device - breaking auto-dial.
633 pri = PacketCheck(bundle, af, tun.data, n, &bundle->filter.out,
636 /* Prepend the number of seconds timeout given in the filter */
637 tun.header.timeout = secs;
638 ncp_Enqueue(&bundle->ncp, af, pri, (char *)&tun, n + sizeof tun.header);
644 bundle_DescriptorWrite(struct fdescriptor *d __unused, struct bundle *bundle,
650 /* This is not actually necessary as struct mpserver doesn't Write() */
651 if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset))
652 if (descriptor_Write(&bundle->ncp.mp.server.desc, bundle, fdset) == 1)
655 for (dl = bundle->links; dl; dl = dl->next)
656 if (descriptor_IsSet(&dl->desc, fdset))
657 switch (descriptor_Write(&dl->desc, bundle, fdset)) {
659 datalink_ComeDown(dl, CLOSE_NORMAL);
669 bundle_LockTun(struct bundle *bundle)
672 char pidfilename[PATH_MAX];
674 snprintf(pidfilename, sizeof pidfilename, "%stun%d.pid", _PATH_VARRUN, bundle->unit);
675 lockfile = ID0fopen(pidfilename, "w");
676 if (lockfile != NULL) {
677 fprintf(lockfile, "%d\n", (int)getpid());
681 log_Printf(LogERROR, "Warning: Can't create %s: %s\n",
682 pidfilename, strerror(errno));
686 bundle_UnlockTun(struct bundle *bundle)
688 char pidfilename[PATH_MAX];
690 snprintf(pidfilename, sizeof pidfilename, "%stun%d.pid", _PATH_VARRUN, bundle->unit);
691 ID0unlink(pidfilename);
695 bundle_Create(const char *prefix, int type, int unit)
697 static struct bundle bundle; /* there can be only one */
698 int enoentcount, err, minunit, maxunit;
700 #if defined(__DragonFly__) && !defined(NOKLDLOAD)
703 #if defined(TUNSIFMODE) || defined(TUNSLMODE) || defined(TUNSIFHEAD)
707 if (bundle.iface != NULL) { /* Already allocated ! */
708 log_Printf(LogALERT, "bundle_Create: There's only one BUNDLE !\n");
721 #if defined(__DragonFly__) && !defined(NOKLDLOAD)
724 for (bundle.unit = minunit; bundle.unit != maxunit; bundle.unit++) {
725 snprintf(bundle.dev.Name, sizeof bundle.dev.Name, "%s%d",
726 prefix, bundle.unit);
727 bundle.dev.fd = ID0open(bundle.dev.Name, O_RDWR);
728 if (bundle.dev.fd >= 0)
730 else if (errno == ENXIO || errno == ENOENT) {
731 #if defined(__DragonFly__) && !defined(NOKLDLOAD)
732 if (bundle.unit == minunit && !kldtried++) {
734 * Attempt to load the tunnel interface KLD if it isn't loaded
737 if (loadmodules(LOAD_VERBOSLY, "if_tun", NULL))
742 if (errno != ENOENT || ++enoentcount > 2) {
750 if (bundle.dev.fd < 0) {
752 log_Printf(LogWARN, "No available tunnel devices found (%s)\n",
755 log_Printf(LogWARN, "%s%d: %s\n", prefix, unit, strerror(err));
759 log_SetTun(bundle.unit);
761 ifname = strrchr(bundle.dev.Name, '/');
763 ifname = bundle.dev.Name;
767 bundle.iface = iface_Create(ifname);
768 if (bundle.iface == NULL) {
769 close(bundle.dev.fd);
774 /* Make sure we're POINTOPOINT & IFF_MULTICAST */
775 iff = IFF_POINTOPOINT | IFF_MULTICAST;
776 if (ID0ioctl(bundle.dev.fd, TUNSIFMODE, &iff) < 0)
777 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFMODE): %s\n",
782 /* Make sure we're not prepending sockaddrs */
784 if (ID0ioctl(bundle.dev.fd, TUNSLMODE, &iff) < 0)
785 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSLMODE): %s\n",
790 /* We want the address family please ! */
792 if (ID0ioctl(bundle.dev.fd, TUNSIFHEAD, &iff) < 0) {
793 log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFHEAD): %s\n",
795 bundle.dev.header = 0;
797 bundle.dev.header = 1;
800 /* Always present for OpenBSD */
801 bundle.dev.header = 1;
804 * If TUNSIFHEAD isn't available and we're not OpenBSD, assume
805 * everything's AF_INET (hopefully the tun device won't pass us
808 bundle.dev.header = 0;
812 log_Printf(LogPHASE, "Using interface: %s\n", ifname);
814 bundle.bandwidth = 0;
815 bundle.routing_seq = 0;
816 bundle.phase = PHASE_DEAD;
817 bundle.CleaningUp = 0;
818 bundle.NatEnabled = 0;
820 bundle.fsm.LayerStart = bundle_LayerStart;
821 bundle.fsm.LayerUp = bundle_LayerUp;
822 bundle.fsm.LayerDown = bundle_LayerDown;
823 bundle.fsm.LayerFinish = bundle_LayerFinish;
824 bundle.fsm.object = &bundle;
826 bundle.cfg.idle.timeout = NCP_IDLE_TIMEOUT;
827 bundle.cfg.idle.min_timeout = 0;
828 *bundle.cfg.auth.name = '\0';
829 *bundle.cfg.auth.key = '\0';
830 bundle.cfg.opt = OPT_IDCHECK | OPT_LOOPBACK | OPT_SROUTES | OPT_TCPMSSFIXUP |
831 OPT_THROUGHPUT | OPT_UTMP;
833 bundle.cfg.opt |= OPT_IPCP;
834 if (probe.ipv6_available)
835 bundle.cfg.opt |= OPT_IPV6CP;
837 *bundle.cfg.label = '\0';
838 bundle.cfg.ifqueue = DEF_IFQUEUE;
839 bundle.cfg.choked.timeout = CHOKED_TIMEOUT;
840 bundle.phys_type.all = type;
841 bundle.phys_type.open = 0;
844 bundle.links = datalink_Create("deflink", &bundle, type);
845 if (bundle.links == NULL) {
846 log_Printf(LogALERT, "Cannot create data link: %s\n", strerror(errno));
847 iface_Destroy(bundle.iface);
849 close(bundle.dev.fd);
853 bundle.desc.type = BUNDLE_DESCRIPTOR;
854 bundle.desc.UpdateSet = bundle_UpdateSet;
855 bundle.desc.IsSet = bundle_IsSet;
856 bundle.desc.Read = bundle_DescriptorRead;
857 bundle.desc.Write = bundle_DescriptorWrite;
859 ncp_Init(&bundle.ncp, &bundle);
861 memset(&bundle.filter, '\0', sizeof bundle.filter);
862 bundle.filter.in.fragok = bundle.filter.in.logok = 1;
863 bundle.filter.in.name = "IN";
864 bundle.filter.out.fragok = bundle.filter.out.logok = 1;
865 bundle.filter.out.name = "OUT";
866 bundle.filter.dial.name = "DIAL";
867 bundle.filter.dial.logok = 1;
868 bundle.filter.alive.name = "ALIVE";
869 bundle.filter.alive.logok = 1;
872 for (i = 0; i < MAXFILTERS; i++) {
873 bundle.filter.in.rule[i].f_action = A_NONE;
874 bundle.filter.out.rule[i].f_action = A_NONE;
875 bundle.filter.dial.rule[i].f_action = A_NONE;
876 bundle.filter.alive.rule[i].f_action = A_NONE;
879 memset(&bundle.idle.timer, '\0', sizeof bundle.idle.timer);
880 bundle.idle.done = 0;
881 bundle.notify.fd = -1;
882 memset(&bundle.choked.timer, '\0', sizeof bundle.choked.timer);
884 radius_Init(&bundle.radius);
887 /* Clean out any leftover crud */
888 iface_Clear(bundle.iface, &bundle.ncp, 0, IFACE_CLEAR_ALL);
890 bundle_LockTun(&bundle);
896 bundle_DownInterface(struct bundle *bundle)
898 route_IfDelete(bundle, 1);
899 iface_ClearFlags(bundle->iface->name, IFF_UP);
903 bundle_Destroy(struct bundle *bundle)
908 * Clean up the interface. We don't really need to do the timer_Stop()s,
909 * mp_Down(), iface_Clear() and bundle_DownInterface() unless we're getting
910 * out under exceptional conditions such as a descriptor exception.
912 timer_Stop(&bundle->idle.timer);
913 timer_Stop(&bundle->choked.timer);
914 mp_Down(&bundle->ncp.mp);
915 iface_Clear(bundle->iface, &bundle->ncp, 0, IFACE_CLEAR_ALL);
916 bundle_DownInterface(bundle);
919 /* Tell the radius server the bad news */
920 radius_Destroy(&bundle->radius);
923 /* Again, these are all DATALINK_CLOSED unless we're abending */
926 dl = datalink_Destroy(dl);
928 ncp_Destroy(&bundle->ncp);
930 close(bundle->dev.fd);
931 bundle_UnlockTun(bundle);
933 /* In case we never made PHASE_NETWORK */
934 bundle_Notify(bundle, EX_ERRDEAD);
936 iface_Destroy(bundle->iface);
937 bundle->iface = NULL;
941 bundle_LinkClosed(struct bundle *bundle, struct datalink *dl)
944 * Our datalink has closed.
945 * CleanDatalinks() (called from DoLoop()) will remove closed
946 * BACKGROUND, FOREGROUND and DIRECT links.
947 * If it's the last data link, enter phase DEAD.
949 * NOTE: dl may not be in our list (bundle_SendDatalink()) !
952 struct datalink *odl;
955 log_SetTtyCommandMode(dl);
958 for (odl = bundle->links; odl; odl = odl->next)
959 if (odl != dl && odl->state != DATALINK_CLOSED)
963 if (dl->physical->type != PHYS_AUTO) /* Not in -auto mode */
964 bundle_DownInterface(bundle);
965 ncp2initial(&bundle->ncp);
966 mp_Down(&bundle->ncp.mp);
967 bundle_NewPhase(bundle, PHASE_DEAD);
969 if (bundle->radius.sessiontime)
970 bundle_StopSessionTimer(bundle);
972 bundle_StopIdleTimer(bundle);
977 bundle_Open(struct bundle *bundle, const char *name, int mask, int force)
980 * Please open the given datalink, or all if name == NULL
984 for (dl = bundle->links; dl; dl = dl->next)
985 if (name == NULL || !strcasecmp(dl->name, name)) {
986 if ((mask & dl->physical->type) &&
987 (dl->state == DATALINK_CLOSED ||
988 (force && dl->state == DATALINK_OPENING &&
989 dl->dial.timer.state == TIMER_RUNNING) ||
990 dl->state == DATALINK_READY)) {
991 timer_Stop(&dl->dial.timer); /* We're finished with this */
992 datalink_Up(dl, 1, 1);
993 if (mask & PHYS_AUTO)
994 break; /* Only one AUTO link at a time */
1002 bundle2datalink(struct bundle *bundle, const char *name)
1004 struct datalink *dl;
1007 for (dl = bundle->links; dl; dl = dl->next)
1008 if (!strcasecmp(dl->name, name))
1010 } else if (bundle->links && !bundle->links->next)
1011 return bundle->links;
1017 bundle_ShowLinks(struct cmdargs const *arg)
1019 struct datalink *dl;
1020 struct pppThroughput *t;
1021 unsigned long long octets;
1024 for (dl = arg->bundle->links; dl; dl = dl->next) {
1025 octets = MAX(dl->physical->link.stats.total.in.OctetsPerSecond,
1026 dl->physical->link.stats.total.out.OctetsPerSecond);
1028 prompt_Printf(arg->prompt, "Name: %s [%s, %s]",
1029 dl->name, mode2Nam(dl->physical->type), datalink_State(dl));
1030 if (dl->physical->link.stats.total.rolling && dl->state == DATALINK_OPEN)
1031 prompt_Printf(arg->prompt, " bandwidth %d, %llu bps (%llu bytes/sec)",
1032 dl->mp.bandwidth ? dl->mp.bandwidth :
1033 physical_GetSpeed(dl->physical),
1034 octets * 8, octets);
1035 prompt_Printf(arg->prompt, "\n");
1038 t = &arg->bundle->ncp.mp.link.stats.total;
1039 octets = MAX(t->in.OctetsPerSecond, t->out.OctetsPerSecond);
1040 secs = t->downtime ? 0 : throughput_uptime(t);
1041 if (secs > t->SamplePeriod)
1042 secs = t->SamplePeriod;
1044 prompt_Printf(arg->prompt, "Currently averaging %llu bps (%llu bytes/sec)"
1045 " over the last %d secs\n", octets * 8, octets, secs);
1051 optval(struct bundle *bundle, int bit)
1053 return (bundle->cfg.opt & bit) ? "enabled" : "disabled";
1057 bundle_ShowStatus(struct cmdargs const *arg)
1061 prompt_Printf(arg->prompt, "Phase %s\n", bundle_PhaseName(arg->bundle));
1062 prompt_Printf(arg->prompt, " Device: %s\n", arg->bundle->dev.Name);
1063 prompt_Printf(arg->prompt, " Interface: %s @ %lubps",
1064 arg->bundle->iface->name, arg->bundle->bandwidth);
1066 if (arg->bundle->upat) {
1067 int secs = bundle_Uptime(arg->bundle);
1069 prompt_Printf(arg->prompt, ", up time %d:%02d:%02d", secs / 3600,
1070 (secs / 60) % 60, secs % 60);
1072 prompt_Printf(arg->prompt, "\n Queued: %lu of %u\n",
1073 (unsigned long)ncp_QueueLen(&arg->bundle->ncp),
1074 arg->bundle->cfg.ifqueue);
1076 prompt_Printf(arg->prompt, "\nDefaults:\n");
1077 prompt_Printf(arg->prompt, " Label: %s\n",
1078 arg->bundle->cfg.label);
1079 prompt_Printf(arg->prompt, " Auth name: %s\n",
1080 arg->bundle->cfg.auth.name);
1081 prompt_Printf(arg->prompt, " Diagnostic socket: ");
1082 if (*server.cfg.sockname != '\0') {
1083 prompt_Printf(arg->prompt, "%s", server.cfg.sockname);
1084 if (server.cfg.mask != (mode_t)-1)
1085 prompt_Printf(arg->prompt, ", mask 0%03o", (int)server.cfg.mask);
1086 prompt_Printf(arg->prompt, "%s\n", server.fd == -1 ? " (not open)" : "");
1087 } else if (server.cfg.port != 0)
1088 prompt_Printf(arg->prompt, "TCP port %d%s\n", server.cfg.port,
1089 server.fd == -1 ? " (not open)" : "");
1091 prompt_Printf(arg->prompt, "none\n");
1093 prompt_Printf(arg->prompt, " Choked Timer: %us\n",
1094 arg->bundle->cfg.choked.timeout);
1097 radius_Show(&arg->bundle->radius, arg->prompt);
1100 prompt_Printf(arg->prompt, " Idle Timer: ");
1101 if (arg->bundle->cfg.idle.timeout) {
1102 prompt_Printf(arg->prompt, "%us", arg->bundle->cfg.idle.timeout);
1103 if (arg->bundle->cfg.idle.min_timeout)
1104 prompt_Printf(arg->prompt, ", min %us",
1105 arg->bundle->cfg.idle.min_timeout);
1106 remaining = bundle_RemainingIdleTime(arg->bundle);
1107 if (remaining != -1)
1108 prompt_Printf(arg->prompt, " (%ds remaining)", remaining);
1109 prompt_Printf(arg->prompt, "\n");
1111 prompt_Printf(arg->prompt, "disabled\n");
1113 prompt_Printf(arg->prompt, " Filter Decap: %-20.20s",
1114 optval(arg->bundle, OPT_FILTERDECAP));
1115 prompt_Printf(arg->prompt, " ID check: %s\n",
1116 optval(arg->bundle, OPT_IDCHECK));
1117 prompt_Printf(arg->prompt, " Iface-Alias: %-20.20s",
1118 optval(arg->bundle, OPT_IFACEALIAS));
1120 prompt_Printf(arg->prompt, " IPCP: %s\n",
1121 optval(arg->bundle, OPT_IPCP));
1122 prompt_Printf(arg->prompt, " IPV6CP: %-20.20s",
1123 optval(arg->bundle, OPT_IPV6CP));
1125 prompt_Printf(arg->prompt, " Keep-Session: %s\n",
1126 optval(arg->bundle, OPT_KEEPSESSION));
1127 prompt_Printf(arg->prompt, " Loopback: %-20.20s",
1128 optval(arg->bundle, OPT_LOOPBACK));
1129 prompt_Printf(arg->prompt, " PasswdAuth: %s\n",
1130 optval(arg->bundle, OPT_PASSWDAUTH));
1131 prompt_Printf(arg->prompt, " Proxy: %-20.20s",
1132 optval(arg->bundle, OPT_PROXY));
1133 prompt_Printf(arg->prompt, " Proxyall: %s\n",
1134 optval(arg->bundle, OPT_PROXYALL));
1135 prompt_Printf(arg->prompt, " Sticky Routes: %-20.20s",
1136 optval(arg->bundle, OPT_SROUTES));
1137 prompt_Printf(arg->prompt, " TCPMSS Fixup: %s\n",
1138 optval(arg->bundle, OPT_TCPMSSFIXUP));
1139 prompt_Printf(arg->prompt, " Throughput: %-20.20s",
1140 optval(arg->bundle, OPT_THROUGHPUT));
1141 prompt_Printf(arg->prompt, " Utmp Logging: %s\n",
1142 optval(arg->bundle, OPT_UTMP));
1148 bundle_IdleTimeout(void *v)
1150 struct bundle *bundle = (struct bundle *)v;
1152 log_Printf(LogPHASE, "Idle timer expired\n");
1153 bundle_StopIdleTimer(bundle);
1154 bundle_Close(bundle, NULL, CLOSE_STAYDOWN);
1158 * Start Idle timer. If timeout is reached, we call bundle_Close() to
1159 * close LCP and link.
1162 bundle_StartIdleTimer(struct bundle *bundle, unsigned secs)
1164 timer_Stop(&bundle->idle.timer);
1165 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) !=
1166 bundle->phys_type.open && bundle->cfg.idle.timeout) {
1167 time_t now = time(NULL);
1170 secs = bundle->cfg.idle.timeout;
1172 /* We want at least `secs' */
1173 if (bundle->cfg.idle.min_timeout > secs && bundle->upat) {
1174 unsigned up = now - bundle->upat;
1176 if (bundle->cfg.idle.min_timeout > up &&
1177 bundle->cfg.idle.min_timeout - up > (long long)secs)
1178 /* Only increase from the current `remaining' value */
1179 secs = bundle->cfg.idle.min_timeout - up;
1181 bundle->idle.timer.func = bundle_IdleTimeout;
1182 bundle->idle.timer.name = "idle";
1183 bundle->idle.timer.load = secs * SECTICKS;
1184 bundle->idle.timer.arg = bundle;
1185 timer_Start(&bundle->idle.timer);
1186 bundle->idle.done = now + secs;
1191 bundle_SetIdleTimer(struct bundle *bundle, unsigned timeout,
1192 unsigned min_timeout)
1194 bundle->cfg.idle.timeout = timeout;
1195 bundle->cfg.idle.min_timeout = min_timeout;
1196 if (ncp_LayersOpen(&bundle->ncp))
1197 bundle_StartIdleTimer(bundle, 0);
1201 bundle_StopIdleTimer(struct bundle *bundle)
1203 timer_Stop(&bundle->idle.timer);
1204 bundle->idle.done = 0;
1208 bundle_RemainingIdleTime(struct bundle *bundle)
1210 if (bundle->idle.done)
1211 return bundle->idle.done - time(NULL);
1218 bundle_SessionTimeout(void *v)
1220 struct bundle *bundle = (struct bundle *)v;
1222 log_Printf(LogPHASE, "Session-Timeout timer expired\n");
1223 bundle_StopSessionTimer(bundle);
1224 bundle_Close(bundle, NULL, CLOSE_STAYDOWN);
1228 bundle_StartSessionTimer(struct bundle *bundle, unsigned secs)
1230 timer_Stop(&bundle->session.timer);
1231 if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) !=
1232 bundle->phys_type.open && bundle->radius.sessiontime) {
1233 time_t now = time(NULL);
1236 secs = bundle->radius.sessiontime;
1238 bundle->session.timer.func = bundle_SessionTimeout;
1239 bundle->session.timer.name = "session";
1240 bundle->session.timer.load = secs * SECTICKS;
1241 bundle->session.timer.arg = bundle;
1242 timer_Start(&bundle->session.timer);
1243 bundle->session.done = now + secs;
1248 bundle_StopSessionTimer(struct bundle *bundle)
1250 timer_Stop(&bundle->session.timer);
1251 bundle->session.done = 0;
1257 bundle_IsDead(struct bundle *bundle)
1259 return !bundle->links || (bundle->phase == PHASE_DEAD && bundle->CleaningUp);
1262 static struct datalink *
1263 bundle_DatalinkLinkout(struct bundle *bundle, struct datalink *dl)
1265 struct datalink **dlp;
1267 for (dlp = &bundle->links; *dlp; dlp = &(*dlp)->next)
1271 bundle_LinksRemoved(bundle);
1279 bundle_DatalinkLinkin(struct bundle *bundle, struct datalink *dl)
1281 struct datalink **dlp = &bundle->links;
1284 dlp = &(*dlp)->next;
1289 bundle_LinkAdded(bundle, dl);
1290 mp_CheckAutoloadTimer(&bundle->ncp.mp);
1294 bundle_CleanDatalinks(struct bundle *bundle)
1296 struct datalink **dlp = &bundle->links;
1300 if ((*dlp)->state == DATALINK_CLOSED &&
1301 (*dlp)->physical->type &
1302 (PHYS_DIRECT|PHYS_BACKGROUND|PHYS_FOREGROUND)) {
1303 *dlp = datalink_Destroy(*dlp);
1306 dlp = &(*dlp)->next;
1309 bundle_LinksRemoved(bundle);
1313 bundle_DatalinkClone(struct bundle *bundle, struct datalink *dl,
1316 if (bundle2datalink(bundle, name)) {
1317 log_Printf(LogWARN, "Clone: %s: name already exists\n", name);
1321 bundle_DatalinkLinkin(bundle, datalink_Clone(dl, name));
1326 bundle_DatalinkRemove(struct bundle *bundle, struct datalink *dl)
1328 dl = bundle_DatalinkLinkout(bundle, dl);
1330 datalink_Destroy(dl);
1334 bundle_SetLabel(struct bundle *bundle, const char *label)
1337 strncpy(bundle->cfg.label, label, sizeof bundle->cfg.label - 1);
1339 *bundle->cfg.label = '\0';
1343 bundle_GetLabel(struct bundle *bundle)
1345 return *bundle->cfg.label ? bundle->cfg.label : NULL;
1349 bundle_LinkSize(void)
1351 struct iovec iov[SCATTER_SEGMENTS];
1352 int niov, expect, f;
1354 iov[0].iov_len = strlen(Version) + 1;
1355 iov[0].iov_base = NULL;
1357 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) {
1358 log_Printf(LogERROR, "Cannot determine space required for link\n");
1362 for (f = expect = 0; f < niov; f++)
1363 expect += iov[f].iov_len;
1369 bundle_ReceiveDatalink(struct bundle *bundle, int s)
1371 char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int) * SEND_MAXFD];
1372 int niov, expect, f, *fd, nfd, onfd;
1374 struct iovec iov[SCATTER_SEGMENTS];
1375 struct cmsghdr *cmsg;
1377 struct datalink *dl;
1380 log_Printf(LogPHASE, "Receiving datalink\n");
1383 * Create our scatter/gather array - passing NULL gets the space
1384 * allocation requirement rather than actually flattening the
1387 iov[0].iov_len = strlen(Version) + 1;
1388 iov[0].iov_base = NULL;
1390 if (datalink2iov(NULL, iov, &niov, SCATTER_SEGMENTS, NULL, NULL) == -1) {
1391 log_Printf(LogERROR, "Cannot determine space required for link\n");
1395 /* Allocate the scatter/gather array for recvmsg() */
1396 for (f = expect = 0; f < niov; f++) {
1397 if ((iov[f].iov_base = malloc(iov[f].iov_len)) == NULL) {
1398 log_Printf(LogERROR, "Cannot allocate space to receive link\n");
1402 expect += iov[f].iov_len;
1405 /* Set up our message */
1406 cmsg = (struct cmsghdr *)cmsgbuf;
1407 cmsg->cmsg_len = sizeof cmsgbuf;
1408 cmsg->cmsg_level = SOL_SOCKET;
1409 cmsg->cmsg_type = 0;
1411 memset(&msg, '\0', sizeof msg);
1412 msg.msg_name = NULL;
1413 msg.msg_namelen = 0;
1415 msg.msg_iovlen = 1; /* Only send the version at the first pass */
1416 msg.msg_control = cmsgbuf;
1417 msg.msg_controllen = sizeof cmsgbuf;
1419 log_Printf(LogDEBUG, "Expecting %u scatter/gather bytes\n",
1420 (unsigned)iov[0].iov_len);
1422 if ((got = recvmsg(s, &msg, MSG_WAITALL)) != (ssize_t)iov[0].iov_len) {
1424 log_Printf(LogERROR, "Failed recvmsg: %s\n", strerror(errno));
1426 log_Printf(LogERROR, "Failed recvmsg: Got %zu, not %u\n",
1427 got, (unsigned)iov[0].iov_len);
1429 free(iov[niov].iov_base);
1433 if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) {
1434 log_Printf(LogERROR, "Recvmsg: no descriptors received !\n");
1436 free(iov[niov].iov_base);
1440 fd = (int *)CMSG_DATA(cmsg);
1441 nfd = ((caddr_t)cmsg + cmsg->cmsg_len - (caddr_t)fd) / sizeof(int);
1444 log_Printf(LogERROR, "Recvmsg: %d descriptor%s received (too few) !\n",
1445 nfd, nfd == 1 ? "" : "s");
1449 free(iov[niov].iov_base);
1454 * We've successfully received two or more open file descriptors
1455 * through our socket, plus a version string. Make sure it's the
1456 * correct version, and drop the connection if it's not.
1458 if (strncmp(Version, iov[0].iov_base, iov[0].iov_len)) {
1459 log_Printf(LogWARN, "Cannot receive datalink, incorrect version"
1460 " (\"%.*s\", not \"%s\")\n", (int)iov[0].iov_len,
1461 (char *)iov[0].iov_base, Version);
1465 free(iov[niov].iov_base);
1470 * Everything looks good. Send the other side our process id so that
1471 * they can transfer lock ownership, and wait for them to send the
1475 if ((got = write(fd[1], &pid, sizeof pid)) != sizeof pid) {
1477 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno));
1479 log_Printf(LogERROR, "Failed write: Got %zu, not %d\n", got,
1484 free(iov[niov].iov_base);
1488 if ((got = readv(fd[1], iov + 1, niov - 1)) != expect) {
1490 log_Printf(LogERROR, "Failed write: %s\n", strerror(errno));
1492 log_Printf(LogERROR, "Failed write: Got %zu, not %d\n", got, expect);
1496 free(iov[niov].iov_base);
1501 onfd = nfd; /* We've got this many in our array */
1502 nfd -= 2; /* Don't include p->fd and our reply descriptor */
1503 niov = 1; /* Skip the version id */
1504 dl = iov2datalink(bundle, iov, &niov, NELEM(iov), fd[0],
1509 log_Printf(LogERROR, "bundle_ReceiveDatalink: Failed to handle %d "
1510 "auxiliary file descriptors (%d remain)\n", onfd, nfd);
1511 datalink_Destroy(dl);
1516 bundle_DatalinkLinkin(bundle, dl);
1517 datalink_AuthOk(dl);
1518 bundle_CalculateBandwidth(dl->bundle);
1527 free(iov[0].iov_base);
1531 bundle_SendDatalink(struct datalink *dl, int s, struct sockaddr_un *sun)
1533 char cmsgbuf[CMSG_SPACE(sizeof(int) * SEND_MAXFD)];
1534 const char *constlock;
1536 struct cmsghdr *cmsg;
1538 struct iovec iov[SCATTER_SEGMENTS];
1539 int niov, f, expect, newsid, fd[SEND_MAXFD], nfd, reply[2];
1543 log_Printf(LogPHASE, "Transmitting datalink %s\n", dl->name);
1545 /* Record the base device name for a lock transfer later */
1546 constlock = physical_LockedDevice(dl->physical);
1548 lock = alloca(strlen(constlock) + 1);
1549 strcpy(lock, constlock);
1553 bundle_LinkClosed(dl->bundle, dl);
1554 bundle_DatalinkLinkout(dl->bundle, dl);
1556 /* Build our scatter/gather array */
1557 iov[0].iov_len = strlen(Version) + 1;
1558 iov[0].iov_base = strdup(Version);
1562 fd[0] = datalink2iov(dl, iov, &niov, SCATTER_SEGMENTS, fd + 2, &nfd);
1564 if (fd[0] != -1 && socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, reply) != -1) {
1566 * fd[1] is used to get the peer process id back, then to confirm that
1567 * we've transferred any device locks to that process id.
1571 nfd += 2; /* Include fd[0] and fd[1] */
1572 memset(&msg, '\0', sizeof msg);
1574 msg.msg_name = NULL;
1575 msg.msg_namelen = 0;
1577 * Only send the version to start... We used to send the whole lot, but
1578 * this caused problems with our RECVBUF size as a single link is about
1579 * 22k ! This way, we should bump into no limits.
1583 msg.msg_control = cmsgbuf;
1584 msg.msg_controllen = CMSG_SPACE(sizeof(int) * nfd);
1587 cmsg = (struct cmsghdr *)cmsgbuf;
1588 cmsg->cmsg_len = msg.msg_controllen;
1589 cmsg->cmsg_level = SOL_SOCKET;
1590 cmsg->cmsg_type = SCM_RIGHTS;
1592 for (f = 0; f < nfd; f++)
1593 *((int *)CMSG_DATA(cmsg) + f) = fd[f];
1595 for (f = 1, expect = 0; f < niov; f++)
1596 expect += iov[f].iov_len;
1598 if (setsockopt(reply[0], SOL_SOCKET, SO_SNDBUF, &expect, sizeof(int)) == -1)
1599 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect,
1601 if (setsockopt(reply[1], SOL_SOCKET, SO_RCVBUF, &expect, sizeof(int)) == -1)
1602 log_Printf(LogERROR, "setsockopt(SO_RCVBUF, %d): %s\n", expect,
1605 log_Printf(LogDEBUG, "Sending %d descriptor%s and %u bytes in scatter"
1606 "/gather array\n", nfd, nfd == 1 ? "" : "s",
1607 (unsigned)iov[0].iov_len);
1609 if ((got = sendmsg(s, &msg, 0)) == -1)
1610 log_Printf(LogERROR, "Failed sendmsg: %s: %s\n",
1611 sun->sun_path, strerror(errno));
1612 else if (got != (ssize_t)iov[0].iov_len)
1613 log_Printf(LogERROR, "%s: Failed initial sendmsg: Only sent %zu of %u\n",
1614 sun->sun_path, got, (unsigned)iov[0].iov_len);
1616 /* We must get the ACK before closing the descriptor ! */
1619 if ((got = read(reply[0], &newpid, sizeof newpid)) == sizeof newpid) {
1620 log_Printf(LogDEBUG, "Received confirmation from pid %ld\n",
1622 if (lock && (res = ID0uu_lock_txfr(lock, newpid)) != UU_LOCK_OK)
1623 log_Printf(LogERROR, "uu_lock_txfr: %s\n", uu_lockerr(res));
1625 log_Printf(LogDEBUG, "Transmitting link (%d bytes)\n", expect);
1626 if ((got = writev(reply[0], iov + 1, niov - 1)) != expect) {
1628 log_Printf(LogERROR, "%s: Failed writev: %s\n",
1629 sun->sun_path, strerror(errno));
1631 log_Printf(LogERROR, "%s: Failed writev: Wrote %zu of %d\n",
1632 sun->sun_path, got, expect);
1634 } else if (got == -1)
1635 log_Printf(LogERROR, "%s: Failed socketpair read: %s\n",
1636 sun->sun_path, strerror(errno));
1638 log_Printf(LogERROR, "%s: Failed socketpair read: Got %zu of %d\n",
1639 sun->sun_path, got, (int)(sizeof newpid));
1645 newsid = Enabled(dl->bundle, OPT_KEEPSESSION) ||
1646 tcgetpgrp(fd[0]) == getpgrp();
1650 bundle_setsid(dl->bundle, got != -1);
1655 free(iov[niov].iov_base);
1659 bundle_RenameDatalink(struct bundle *bundle, struct datalink *ndl,
1662 struct datalink *dl;
1664 if (!strcasecmp(ndl->name, name))
1667 for (dl = bundle->links; dl; dl = dl->next)
1668 if (!strcasecmp(dl->name, name))
1671 datalink_Rename(ndl, name);
1676 bundle_SetMode(struct bundle *bundle, struct datalink *dl, int mode)
1680 omode = dl->physical->type;
1684 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO))
1685 /* First auto link */
1686 if (bundle->ncp.ipcp.peer_ip.s_addr == INADDR_ANY) {
1687 log_Printf(LogWARN, "You must `set ifaddr' or `open' before"
1688 " changing mode to %s\n", mode2Nam(mode));
1692 if (!datalink_SetMode(dl, mode))
1695 if (mode == PHYS_AUTO && !(bundle->phys_type.all & PHYS_AUTO) &&
1696 bundle->phase != PHASE_NETWORK)
1697 /* First auto link, we need an interface */
1698 ipcp_InterfaceUp(&bundle->ncp.ipcp);
1700 /* Regenerate phys_type and adjust idle timer */
1701 bundle_LinksRemoved(bundle);
1707 bundle_setsid(struct bundle *bundle, int holdsession)
1710 * Lose the current session. This means getting rid of our pid
1711 * too so that the tty device will really go away, and any getty
1712 * etc will be allowed to restart.
1717 struct datalink *dl;
1719 if (!holdsession && bundle_IsDead(bundle)) {
1721 * No need to lose our session after all... we're going away anyway
1723 * We should really stop the timer and pause if holdsession is set and
1724 * the bundle's dead, but that leaves other resources lying about :-(
1730 if (pipe(fds) == -1) {
1731 log_Printf(LogERROR, "pipe: %s\n", strerror(errno));
1734 switch ((pid = fork())) {
1736 log_Printf(LogERROR, "fork: %s\n", strerror(errno));
1742 read(fds[0], &done, 1); /* uu_locks are mine ! */
1744 if (pipe(fds) == -1) {
1745 log_Printf(LogERROR, "pipe(2): %s\n", strerror(errno));
1748 switch ((pid = fork())) {
1750 log_Printf(LogERROR, "fork(2): %s\n", strerror(errno));
1756 bundle_LockTun(bundle); /* update pid */
1757 read(fds[0], &done, 1); /* uu_locks are mine ! */
1760 bundle_ChangedPID(bundle);
1761 log_Printf(LogDEBUG, "%ld -> %ld: %s session control\n",
1762 (long)orig, (long)getpid(),
1763 holdsession ? "Passed" : "Dropped");
1764 timer_InitService(0); /* Start the Timer Service */
1768 /* Give away all our physical locks (to the final process) */
1769 for (dl = bundle->links; dl; dl = dl->next)
1770 if (dl->state != DATALINK_CLOSED)
1771 physical_ChangedPid(dl->physical, pid);
1772 write(fds[1], "!", 1); /* done */
1780 /* Give away all our physical locks (to the intermediate process) */
1781 for (dl = bundle->links; dl; dl = dl->next)
1782 if (dl->state != DATALINK_CLOSED)
1783 physical_ChangedPid(dl->physical, pid);
1784 write(fds[1], "!", 1); /* done */
1789 timer_TermService();
1790 signal(SIGPIPE, SIG_DFL);
1791 signal(SIGALRM, SIG_DFL);
1792 signal(SIGHUP, SIG_DFL);
1793 signal(SIGTERM, SIG_DFL);
1794 signal(SIGINT, SIG_DFL);
1795 signal(SIGQUIT, SIG_DFL);
1796 for (fd = getdtablesize(); fd >= 0; fd--)
1799 * Reap the intermediate process. As we're not exiting but the
1800 * intermediate is, we don't want it to become defunct.
1802 waitpid(pid, &status, 0);
1803 /* Tweak our process arguments.... */
1804 SetTitle("session owner");
1806 setuid(ID0realuid());
1809 * Hang around for a HUP. This should happen as soon as the
1810 * ppp that we passed our ctty descriptor to closes it.
1811 * NOTE: If this process dies, the passed descriptor becomes
1812 * invalid and will give a select() error by setting one
1813 * of the error fds, aborting the other ppp. We don't
1814 * want that to happen !
1824 bundle_HighestState(struct bundle *bundle)
1826 struct datalink *dl;
1827 unsigned result = DATALINK_CLOSED;
1829 for (dl = bundle->links; dl; dl = dl->next)
1830 if (result < dl->state)
1837 bundle_Exception(struct bundle *bundle, int fd)
1839 struct datalink *dl;
1841 for (dl = bundle->links; dl; dl = dl->next)
1842 if (dl->physical->fd == fd) {
1843 datalink_Down(dl, CLOSE_NORMAL);
1851 bundle_AdjustFilters(struct bundle *bundle, struct ncpaddr *local,
1852 struct ncpaddr *remote)
1854 filter_AdjustAddr(&bundle->filter.in, local, remote, NULL);
1855 filter_AdjustAddr(&bundle->filter.out, local, remote, NULL);
1856 filter_AdjustAddr(&bundle->filter.dial, local, remote, NULL);
1857 filter_AdjustAddr(&bundle->filter.alive, local, remote, NULL);
1861 bundle_AdjustDNS(struct bundle *bundle)
1863 struct in_addr *dns = bundle->ncp.ipcp.ns.dns;
1865 filter_AdjustAddr(&bundle->filter.in, NULL, NULL, dns);
1866 filter_AdjustAddr(&bundle->filter.out, NULL, NULL, dns);
1867 filter_AdjustAddr(&bundle->filter.dial, NULL, NULL, dns);
1868 filter_AdjustAddr(&bundle->filter.alive, NULL, NULL, dns);
1872 bundle_CalculateBandwidth(struct bundle *bundle)
1874 struct datalink *dl;
1875 int sp, overhead, maxoverhead;
1877 bundle->bandwidth = 0;
1878 bundle->iface->mtu = 0;
1881 for (dl = bundle->links; dl; dl = dl->next) {
1882 overhead = ccp_MTUOverhead(&dl->physical->link.ccp);
1883 if (maxoverhead < overhead)
1884 maxoverhead = overhead;
1885 if (dl->state == DATALINK_OPEN) {
1886 if ((sp = dl->mp.bandwidth) == 0 &&
1887 (sp = physical_GetSpeed(dl->physical)) == 0)
1888 log_Printf(LogDEBUG, "%s: %s: Cannot determine bandwidth\n",
1889 dl->name, dl->physical->name.full);
1891 bundle->bandwidth += sp;
1892 if (!bundle->ncp.mp.active) {
1893 bundle->iface->mtu = dl->physical->link.lcp.his_mru;
1899 if (bundle->bandwidth == 0)
1900 bundle->bandwidth = 115200; /* Shrug */
1902 if (bundle->ncp.mp.active) {
1903 bundle->iface->mtu = bundle->ncp.mp.peer_mrru;
1904 overhead = ccp_MTUOverhead(&bundle->ncp.mp.link.ccp);
1905 if (maxoverhead < overhead)
1906 maxoverhead = overhead;
1907 } else if (!bundle->iface->mtu)
1908 bundle->iface->mtu = DEF_MRU;
1911 if (bundle->radius.valid && bundle->radius.mtu &&
1912 bundle->radius.mtu < bundle->iface->mtu) {
1913 log_Printf(LogLCP, "Reducing MTU to radius value %lu\n",
1914 bundle->radius.mtu);
1915 bundle->iface->mtu = bundle->radius.mtu;
1920 log_Printf(LogLCP, "Reducing MTU from %lu to %lu (CCP requirement)\n",
1921 bundle->iface->mtu, bundle->iface->mtu - maxoverhead);
1922 bundle->iface->mtu -= maxoverhead;
1925 tun_configure(bundle);
1927 route_UpdateMTU(bundle);
1931 bundle_AutoAdjust(struct bundle *bundle, int percent, int what)
1933 struct datalink *dl, *choice, *otherlinkup;
1935 choice = otherlinkup = NULL;
1936 for (dl = bundle->links; dl; dl = dl->next)
1937 if (dl->physical->type == PHYS_AUTO) {
1938 if (dl->state == DATALINK_OPEN) {
1939 if (what == AUTO_DOWN) {
1941 otherlinkup = choice;
1944 } else if (dl->state == DATALINK_CLOSED) {
1945 if (what == AUTO_UP) {
1950 /* An auto link in an intermediate state - forget it for the moment */
1954 } else if (dl->state == DATALINK_OPEN && what == AUTO_DOWN)
1958 if (what == AUTO_UP) {
1959 log_Printf(LogPHASE, "%d%% saturation -> Opening link ``%s''\n",
1960 percent, choice->name);
1961 datalink_Up(choice, 1, 1);
1962 mp_CheckAutoloadTimer(&bundle->ncp.mp);
1963 } else if (otherlinkup) { /* Only bring the second-last link down */
1964 log_Printf(LogPHASE, "%d%% saturation -> Closing link ``%s''\n",
1965 percent, choice->name);
1966 datalink_Close(choice, CLOSE_STAYDOWN);
1967 mp_CheckAutoloadTimer(&bundle->ncp.mp);
1973 bundle_WantAutoloadTimer(struct bundle *bundle)
1975 struct datalink *dl;
1976 int autolink, opened;
1978 if (bundle->phase == PHASE_NETWORK) {
1979 for (autolink = opened = 0, dl = bundle->links; dl; dl = dl->next)
1980 if (dl->physical->type == PHYS_AUTO) {
1981 if (++autolink == 2 || (autolink == 1 && opened))
1982 /* Two auto links or one auto and one open in NETWORK phase */
1984 } else if (dl->state == DATALINK_OPEN) {
1987 /* One auto and one open link in NETWORK phase */
1996 bundle_ChangedPID(struct bundle *bundle)
1999 ioctl(bundle->dev.fd, TUNSIFPID, 0);
2004 bundle_Uptime(struct bundle *bundle)
2007 return time(NULL) - bundle->upat;