diff options
Diffstat (limited to 'usr.sbin/ppp/bundle.c')
| -rw-r--r-- | usr.sbin/ppp/bundle.c | 2019 |
1 files changed, 0 insertions, 2019 deletions
diff --git a/usr.sbin/ppp/bundle.c b/usr.sbin/ppp/bundle.c deleted file mode 100644 index 912f855..0000000 --- a/usr.sbin/ppp/bundle.c +++ /dev/null @@ -1,2019 +0,0 @@ -/*- - * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org> - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * $FreeBSD$ - */ - -#include <sys/param.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <net/if.h> -#include <net/if_tun.h> /* For TUNS* ioctls */ -#include <net/route.h> -#include <netinet/in_systm.h> -#include <netinet/ip.h> -#include <sys/un.h> - -#include <errno.h> -#include <fcntl.h> -#ifdef __OpenBSD__ -#include <util.h> -#else -#include <libutil.h> -#endif -#include <paths.h> -#include <stdarg.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/uio.h> -#include <sys/wait.h> -#include <termios.h> -#include <unistd.h> - -#include "layer.h" -#include "defs.h" -#include "command.h" -#include "mbuf.h" -#include "log.h" -#include "id.h" -#include "timer.h" -#include "fsm.h" -#include "iplist.h" -#include "lqr.h" -#include "hdlc.h" -#include "throughput.h" -#include "slcompress.h" -#include "ncpaddr.h" -#include "ip.h" -#include "ipcp.h" -#include "filter.h" -#include "descriptor.h" -#include "route.h" -#include "lcp.h" -#include "ccp.h" -#include "link.h" -#include "mp.h" -#ifndef NORADIUS -#include "radius.h" -#endif -#include "ipv6cp.h" -#include "ncp.h" -#include "bundle.h" -#include "async.h" -#include "physical.h" -#include "auth.h" -#include "proto.h" -#include "chap.h" -#include "tun.h" -#include "prompt.h" -#include "chat.h" -#include "cbcp.h" -#include "datalink.h" -#include "iface.h" -#include "server.h" -#include "probe.h" -#ifndef NODES -#include "mppe.h" -#endif - -#define SCATTER_SEGMENTS 7 /* version, datalink, name, physical, - throughput, throughput, device */ - -#define SEND_MAXFD 3 /* Max file descriptors passed through - the local domain socket */ - -static int bundle_RemainingIdleTime(struct bundle *); - -static const char * const PhaseNames[] = { - "Dead", "Establish", "Authenticate", "Network", "Terminate" -}; - -const char * -bundle_PhaseName(struct bundle *bundle) -{ - return bundle->phase <= PHASE_TERMINATE ? - PhaseNames[bundle->phase] : "unknown"; -} - -void -bundle_NewPhase(struct bundle *bundle, u_int new) -{ - if (new == bundle->phase) - return; - - if (new <= PHASE_TERMINATE) - log_Printf(LogPHASE, "bundle: %s\n", PhaseNames[new]); - - switch (new) { - case PHASE_DEAD: - bundle->phase = new; -#ifndef NODES - MPPE_MasterKeyValid = 0; -#endif - log_DisplayPrompts(); - break; - - case PHASE_ESTABLISH: - bundle->phase = new; - break; - - case PHASE_AUTHENTICATE: - bundle->phase = new; - log_DisplayPrompts(); - break; - - case PHASE_NETWORK: - if (ncp_fsmStart(&bundle->ncp, bundle)) { - bundle->phase = new; - log_DisplayPrompts(); - } else { - log_Printf(LogPHASE, "bundle: All NCPs are disabled\n"); - bundle_Close(bundle, NULL, CLOSE_STAYDOWN); - } - break; - - case PHASE_TERMINATE: - bundle->phase = new; - mp_Down(&bundle->ncp.mp); - log_DisplayPrompts(); - break; - } -} - -static void -bundle_LayerStart(void *v __unused, struct fsm *fp __unused) -{ - /* The given FSM is about to start up ! */ -} - - -void -bundle_Notify(struct bundle *bundle, char c) -{ - if (bundle->notify.fd != -1) { - int ret; - - ret = write(bundle->notify.fd, &c, 1); - if (c != EX_REDIAL && c != EX_RECONNECT) { - if (ret == 1) - log_Printf(LogCHAT, "Parent notified of %s\n", - c == EX_NORMAL ? "success" : "failure"); - else - log_Printf(LogERROR, "Failed to notify parent of success\n"); - close(bundle->notify.fd); - bundle->notify.fd = -1; - } else if (ret == 1) - log_Printf(LogCHAT, "Parent notified of %s\n", ex_desc(c)); - else - log_Printf(LogERROR, "Failed to notify parent of %s\n", ex_desc(c)); - } -} - -static void -bundle_ClearQueues(void *v) -{ - struct bundle *bundle = (struct bundle *)v; - struct datalink *dl; - - log_Printf(LogPHASE, "Clearing choked output queue\n"); - timer_Stop(&bundle->choked.timer); - - /* - * Emergency time: - * - * We've had a full queue for PACKET_DEL_SECS seconds without being - * able to get rid of any of the packets. We've probably given up - * on the redials at this point, and the queued data has almost - * definitely been timed out by the layer above. As this is preventing - * us from reading the TUN_NAME device (we don't want to buffer stuff - * indefinitely), we may as well nuke this data and start with a clean - * slate ! - * - * Unfortunately, this has the side effect of shafting any compression - * dictionaries in use (causing the relevant RESET_REQ/RESET_ACK). - */ - - ncp_DeleteQueues(&bundle->ncp); - for (dl = bundle->links; dl; dl = dl->next) - physical_DeleteQueue(dl->physical); -} - -static void -bundle_LinkAdded(struct bundle *bundle, struct datalink *dl) -{ - bundle->phys_type.all |= dl->physical->type; - if (dl->state == DATALINK_OPEN) - bundle->phys_type.open |= dl->physical->type; - -#ifndef NORADIUS - if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) - != bundle->phys_type.open && bundle->session.timer.state == TIMER_STOPPED) - if (bundle->radius.sessiontime) - bundle_StartSessionTimer(bundle, 0); -#endif - - if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) - != bundle->phys_type.open && bundle->idle.timer.state == TIMER_STOPPED) - /* We may need to start our idle timer */ - bundle_StartIdleTimer(bundle, 0); -} - -void -bundle_LinksRemoved(struct bundle *bundle) -{ - struct datalink *dl; - - bundle->phys_type.all = bundle->phys_type.open = 0; - for (dl = bundle->links; dl; dl = dl->next) - bundle_LinkAdded(bundle, dl); - - bundle_CalculateBandwidth(bundle); - mp_CheckAutoloadTimer(&bundle->ncp.mp); - - if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) - == bundle->phys_type.open) { -#ifndef NORADIUS - if (bundle->radius.sessiontime) - bundle_StopSessionTimer(bundle); -#endif - bundle_StopIdleTimer(bundle); - } -} - -static void -bundle_LayerUp(void *v, struct fsm *fp) -{ - /* - * The given fsm is now up - * If it's an LCP, adjust our phys_mode.open value and check the - * autoload timer. - * If it's the first NCP, calculate our bandwidth - * If it's the first NCP, set our ``upat'' time - * If it's the first NCP, start the idle timer. - * If it's an NCP, tell our -background parent to go away. - * If it's the first NCP, start the autoload timer - */ - struct bundle *bundle = (struct bundle *)v; - - if (fp->proto == PROTO_LCP) { - struct physical *p = link2physical(fp->link); - - bundle_LinkAdded(bundle, p->dl); - mp_CheckAutoloadTimer(&bundle->ncp.mp); - } else if (isncp(fp->proto)) { - if (ncp_LayersOpen(&fp->bundle->ncp) == 1) { - bundle_CalculateBandwidth(fp->bundle); - time(&bundle->upat); -#ifndef NORADIUS - if (bundle->radius.sessiontime) - bundle_StartSessionTimer(bundle, 0); -#endif - bundle_StartIdleTimer(bundle, 0); - mp_CheckAutoloadTimer(&fp->bundle->ncp.mp); - } - bundle_Notify(bundle, EX_NORMAL); - } else if (fp->proto == PROTO_CCP) - bundle_CalculateBandwidth(fp->bundle); /* Against ccp_MTUOverhead */ -} - -static void -bundle_LayerDown(void *v, struct fsm *fp) -{ - /* - * The given FSM has been told to come down. - * If it's our last NCP, stop the idle timer. - * If it's our last NCP, clear our ``upat'' value. - * If it's our last NCP, stop the autoload timer - * If it's an LCP, adjust our phys_type.open value and any timers. - * If it's an LCP and we're in multilink mode, adjust our tun - * If it's the last LCP, down all NCPs - * speed and make sure our minimum sequence number is adjusted. - */ - - struct bundle *bundle = (struct bundle *)v; - - if (isncp(fp->proto)) { - if (ncp_LayersOpen(&fp->bundle->ncp) == 0) { -#ifndef NORADIUS - if (bundle->radius.sessiontime) - bundle_StopSessionTimer(bundle); -#endif - bundle_StopIdleTimer(bundle); - bundle->upat = 0; - mp_StopAutoloadTimer(&bundle->ncp.mp); - } - } else if (fp->proto == PROTO_LCP) { - struct datalink *dl; - struct datalink *lost; - int others_active; - - bundle_LinksRemoved(bundle); /* adjust timers & phys_type values */ - - lost = NULL; - others_active = 0; - for (dl = bundle->links; dl; dl = dl->next) { - if (fp == &dl->physical->link.lcp.fsm) - lost = dl; - else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) - others_active++; - } - - if (bundle->ncp.mp.active) { - bundle_CalculateBandwidth(bundle); - - if (lost) - mp_LinkLost(&bundle->ncp.mp, lost); - else - log_Printf(LogALERT, "Oops, lost an unrecognised datalink (%s) !\n", - fp->link->name); - } - - if (!others_active) { - /* Down the NCPs. We don't expect to get fsm_Close()d ourself ! */ - ncp2initial(&bundle->ncp); - mp_Down(&bundle->ncp.mp); - } - } -} - -static void -bundle_LayerFinish(void *v, struct fsm *fp) -{ - /* The given fsm is now down (fp cannot be NULL) - * - * If it's the last NCP, fsm_Close all LCPs - * If it's the last NCP, bring any MP layer down - */ - - struct bundle *bundle = (struct bundle *)v; - struct datalink *dl; - - if (isncp(fp->proto) && !ncp_LayersUnfinished(&bundle->ncp)) { - if (bundle_Phase(bundle) != PHASE_DEAD) - bundle_NewPhase(bundle, PHASE_TERMINATE); - for (dl = bundle->links; dl; dl = dl->next) - if (dl->state == DATALINK_OPEN) - datalink_Close(dl, CLOSE_STAYDOWN); - fsm2initial(fp); - mp_Down(&bundle->ncp.mp); - } -} - -void -bundle_Close(struct bundle *bundle, const char *name, int how) -{ - /* - * Please close the given datalink. - * If name == NULL or name is the last datalink, fsm_Close all NCPs - * (except our MP) - * If it isn't the last datalink, just Close that datalink. - */ - - struct datalink *dl, *this_dl; - int others_active; - - others_active = 0; - this_dl = NULL; - - for (dl = bundle->links; dl; dl = dl->next) { - if (name && !strcasecmp(name, dl->name)) - this_dl = dl; - if (name == NULL || this_dl == dl) { - switch (how) { - case CLOSE_LCP: - datalink_DontHangup(dl); - break; - case CLOSE_STAYDOWN: - datalink_StayDown(dl); - break; - } - } else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) - others_active++; - } - - if (name && this_dl == NULL) { - log_Printf(LogWARN, "%s: Invalid datalink name\n", name); - return; - } - - if (!others_active) { -#ifndef NORADIUS - if (bundle->radius.sessiontime) - bundle_StopSessionTimer(bundle); -#endif - bundle_StopIdleTimer(bundle); - if (ncp_LayersUnfinished(&bundle->ncp)) - ncp_Close(&bundle->ncp); - else { - ncp2initial(&bundle->ncp); - mp_Down(&bundle->ncp.mp); - for (dl = bundle->links; dl; dl = dl->next) - datalink_Close(dl, how); - } - } else if (this_dl && this_dl->state != DATALINK_CLOSED && - this_dl->state != DATALINK_HANGUP) - datalink_Close(this_dl, how); -} - -void -bundle_Down(struct bundle *bundle, int how) -{ - struct datalink *dl; - - for (dl = bundle->links; dl; dl = dl->next) - datalink_Down(dl, how); -} - -static int -bundle_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n) -{ - struct bundle *bundle = descriptor2bundle(d); - struct datalink *dl; - int result, nlinks; - u_short ifqueue; - size_t queued; - - result = 0; - - /* If there are aren't many packets queued, look for some more. */ - for (nlinks = 0, dl = bundle->links; dl; dl = dl->next) - nlinks++; - - if (nlinks) { - queued = r ? ncp_FillPhysicalQueues(&bundle->ncp, bundle) : - ncp_QueueLen(&bundle->ncp); - - if (r && (bundle->phase == PHASE_NETWORK || - bundle->phys_type.all & PHYS_AUTO)) { - /* enough surplus so that we can tell if we're getting swamped */ - ifqueue = nlinks > bundle->cfg.ifqueue ? nlinks : bundle->cfg.ifqueue; - if (queued < ifqueue) { - /* Not enough - select() for more */ - if (bundle->choked.timer.state == TIMER_RUNNING) - timer_Stop(&bundle->choked.timer); /* Not needed any more */ - FD_SET(bundle->dev.fd, r); - if (*n < bundle->dev.fd + 1) - *n = bundle->dev.fd + 1; - log_Printf(LogTIMER, "%s: fdset(r) %d\n", TUN_NAME, bundle->dev.fd); - result++; - } else if (bundle->choked.timer.state == TIMER_STOPPED) { - bundle->choked.timer.func = bundle_ClearQueues; - bundle->choked.timer.name = "output choke"; - bundle->choked.timer.load = bundle->cfg.choked.timeout * SECTICKS; - bundle->choked.timer.arg = bundle; - timer_Start(&bundle->choked.timer); - } - } - } - -#ifndef NORADIUS - result += descriptor_UpdateSet(&bundle->radius.desc, r, w, e, n); -#endif - - /* Which links need a select() ? */ - for (dl = bundle->links; dl; dl = dl->next) - result += descriptor_UpdateSet(&dl->desc, r, w, e, n); - - /* - * This *MUST* be called after the datalink UpdateSet()s as it - * might be ``holding'' one of the datalinks (death-row) and - * wants to be able to de-select() it from the descriptor set. - */ - result += descriptor_UpdateSet(&bundle->ncp.mp.server.desc, r, w, e, n); - - return result; -} - -static int -bundle_IsSet(struct fdescriptor *d, const fd_set *fdset) -{ - struct bundle *bundle = descriptor2bundle(d); - struct datalink *dl; - - for (dl = bundle->links; dl; dl = dl->next) - if (descriptor_IsSet(&dl->desc, fdset)) - return 1; - -#ifndef NORADIUS - if (descriptor_IsSet(&bundle->radius.desc, fdset)) - return 1; -#endif - - if (descriptor_IsSet(&bundle->ncp.mp.server.desc, fdset)) - return 1; - - return FD_ISSET(bundle->dev.fd, fdset); -} - -static void -bundle_DescriptorRead(struct fdescriptor *d __unused, struct bundle *bundle, - const fd_set *fdset) -{ - struct datalink *dl; - unsigned secs; - 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 __unused, 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.optmask = (1ull << OPT_IDCHECK) | (1ull << OPT_LOOPBACK) | - (1ull << OPT_SROUTES) | (1ull << OPT_TCPMSSFIXUP) | - (1ull << OPT_THROUGHPUT) | (1ull << OPT_UTMP) | - (1ull << OPT_NAS_IP_ADDRESS) | - (1ull << OPT_NAS_IDENTIFIER); -#ifndef NOINET6 - opt_enable(&bundle, OPT_IPCP); - if (probe.ipv6_available) - opt_enable(&bundle, 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); -#ifndef NORADIUS - if (bundle->radius.sessiontime) - bundle_StopSessionTimer(bundle); -#endif - 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 opt) -{ - return Enabled(bundle, opt) ? "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: %us\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, "%us", arg->bundle->cfg.idle.timeout); - if (arg->bundle->cfg.idle.min_timeout) - prompt_Printf(arg->prompt, ", min %us", - 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)); - prompt_Printf(arg->prompt, " NAS-IP-Address: %-20.20s", - optval(arg->bundle, OPT_NAS_IP_ADDRESS)); - prompt_Printf(arg->prompt, " NAS-Identifier: %s\n", - optval(arg->bundle, OPT_NAS_IDENTIFIER)); - - 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) { - unsigned up = now - bundle->upat; - - if (bundle->cfg.idle.min_timeout > up && - 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, unsigned timeout, - unsigned min_timeout) -{ - bundle->cfg.idle.timeout = timeout; - 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; -} - -#ifndef NORADIUS - -static void -bundle_SessionTimeout(void *v) -{ - struct bundle *bundle = (struct bundle *)v; - - log_Printf(LogPHASE, "Session-Timeout timer expired\n"); - bundle_StopSessionTimer(bundle); - bundle_Close(bundle, NULL, CLOSE_STAYDOWN); -} - -void -bundle_StartSessionTimer(struct bundle *bundle, unsigned secs) -{ - timer_Stop(&bundle->session.timer); - if ((bundle->phys_type.open & (PHYS_DEDICATED|PHYS_DDIAL)) != - bundle->phys_type.open && bundle->radius.sessiontime) { - time_t now = time(NULL); - - if (secs == 0) - secs = bundle->radius.sessiontime; - - bundle->session.timer.func = bundle_SessionTimeout; - bundle->session.timer.name = "session"; - bundle->session.timer.load = secs * SECTICKS; - bundle->session.timer.arg = bundle; - timer_Start(&bundle->session.timer); - bundle->session.done = now + secs; - } -} - -void -bundle_StopSessionTimer(struct bundle *bundle) -{ - timer_Stop(&bundle->session.timer); - bundle->session.done = 0; -} - -#endif - -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; - ssize_t 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)) != (ssize_t)iov[0].iov_len) { - if (got == -1) - log_Printf(LogERROR, "Failed recvmsg: %s\n", strerror(errno)); - else - log_Printf(LogERROR, "Failed recvmsg: Got %zd, 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 %zd, 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 %zd, 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]; - ssize_t 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 != (ssize_t)iov[0].iov_len) - log_Printf(LogERROR, "%s: Failed initial sendmsg: Only sent %zd 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 %ld\n", - (long)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 %zd 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 %zd 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, "%ld -> %ld: %s session control\n", - (long)orig, (long)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; - } -} - -unsigned -bundle_HighestState(struct bundle *bundle) -{ - struct datalink *dl; - unsigned 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 %lu to %lu (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; -} |
