diff --git a/usr.sbin/ppp/bundle.c b/usr.sbin/ppp/bundle.c index bb6b989eaa84..d6beda3a1867 100644 --- a/usr.sbin/ppp/bundle.c +++ b/usr.sbin/ppp/bundle.c @@ -1,1351 +1,1354 @@ /*- * Copyright (c) 1998 Brian Somers * 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. * - * $Id: bundle.c,v 1.1.2.80 1998/05/10 10:21:10 brian Exp $ + * $Id: bundle.c,v 1.1.2.81 1998/05/10 22:20:06 brian Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "command.h" #include "mbuf.h" #include "log.h" #include "id.h" #include "defs.h" #include "timer.h" #include "fsm.h" #include "iplist.h" #include "lqr.h" #include "hdlc.h" #include "throughput.h" #include "slcompress.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" #include "bundle.h" #include "async.h" #include "physical.h" #include "modem.h" #include "loadalias.h" #include "auth.h" #include "lcpproto.h" #include "chap.h" #include "tun.h" #include "prompt.h" #include "chat.h" #include "datalink.h" #include "ip.h" #define SCATTER_SEGMENTS 4 /* version, datalink, name, physical */ #define SOCKET_OVERHEAD 100 /* additional buffer space for large */ /* {recv,send}msg() calls */ static const char *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; break; case PHASE_ESTABLISH: bundle->phase = new; break; case PHASE_AUTHENTICATE: bundle->phase = new; bundle_DisplayPrompt(bundle); break; case PHASE_NETWORK: ipcp_Setup(&bundle->ncp.ipcp); fsm_Up(&bundle->ncp.ipcp.fsm); fsm_Open(&bundle->ncp.ipcp.fsm); bundle->phase = new; bundle_DisplayPrompt(bundle); break; case PHASE_TERMINATE: bundle->phase = new; mp_Down(&bundle->ncp.mp); bundle_DisplayPrompt(bundle); break; } } static int bundle_CleanInterface(const struct bundle *bundle) { int s; struct ifreq ifrq; struct ifaliasreq ifra; s = ID0socket(AF_INET, SOCK_DGRAM, 0); if (s < 0) { log_Printf(LogERROR, "bundle_CleanInterface: socket(): %s\n", strerror(errno)); return (-1); } strncpy(ifrq.ifr_name, bundle->ifp.Name, sizeof ifrq.ifr_name - 1); ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0'; while (ID0ioctl(s, SIOCGIFADDR, &ifrq) == 0) { memset(&ifra.ifra_mask, '\0', sizeof ifra.ifra_mask); strncpy(ifra.ifra_name, bundle->ifp.Name, sizeof ifra.ifra_name - 1); ifra.ifra_name[sizeof ifra.ifra_name - 1] = '\0'; ifra.ifra_addr = ifrq.ifr_addr; if (ID0ioctl(s, SIOCGIFDSTADDR, &ifrq) < 0) { if (ifra.ifra_addr.sa_family == AF_INET) log_Printf(LogERROR, "bundle_CleanInterface: Can't get dst for %s on %s !\n", inet_ntoa(((struct sockaddr_in *)&ifra.ifra_addr)->sin_addr), bundle->ifp.Name); return 0; } ifra.ifra_broadaddr = ifrq.ifr_dstaddr; if (ID0ioctl(s, SIOCDIFADDR, &ifra) < 0) { if (ifra.ifra_addr.sa_family == AF_INET) log_Printf(LogERROR, "bundle_CleanInterface: Can't delete %s address on %s !\n", inet_ntoa(((struct sockaddr_in *)&ifra.ifra_addr)->sin_addr), bundle->ifp.Name); return 0; } } return 1; } static void bundle_LayerStart(void *v, struct fsm *fp) { /* The given FSM is about to start up ! */ } static void bundle_Notify(struct bundle *bundle, char c) { if (bundle->notify.fd != -1) { if (write(bundle->notify.fd, &c, 1) == 1) log_Printf(LogPHASE, "Parent notified of success.\n"); else log_Printf(LogPHASE, "Failed to notify parent of success.\n"); close(bundle->notify.fd); bundle->notify.fd = -1; } } static void bundle_LayerUp(void *v, struct fsm *fp) { /* * The given fsm is now up * If it's an LCP set our mtu (if we're multilink, add up the link * speeds and set the MRRU). * If it's an NCP, tell our -background parent to go away. * If it's the first NCP, start the idle timer. */ struct bundle *bundle = (struct bundle *)v; if (fp->proto == PROTO_LCP) { if (bundle->ncp.mp.active) { struct datalink *dl; bundle->ifp.Speed = 0; for (dl = bundle->links; dl; dl = dl->next) if (dl->state == DATALINK_OPEN) bundle->ifp.Speed += modem_Speed(dl->physical); tun_configure(bundle, bundle->ncp.mp.peer_mrru); } else { bundle->ifp.Speed = modem_Speed(link2physical(fp->link)); tun_configure(bundle, fsm2lcp(fp)->his_mru); } } else if (fp->proto == PROTO_IPCP) { bundle_StartIdleTimer(bundle); bundle_Notify(bundle, EX_NORMAL); } } 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 an LCP and we're in multilink mode, adjust our tun speed. */ struct bundle *bundle = (struct bundle *)v; if (fp->proto == PROTO_IPCP) bundle_StopIdleTimer(bundle); else if (fp->proto == PROTO_LCP && bundle->ncp.mp.active) { struct datalink *dl; bundle->ifp.Speed = 0; for (dl = bundle->links; dl; dl = dl->next) if (fp != &dl->physical->link.lcp.fsm && dl->state == DATALINK_OPEN) bundle->ifp.Speed += modem_Speed(dl->physical); if (bundle->ifp.Speed) /* Don't configure down to a speed of 0 */ tun_configure(bundle, bundle->ncp.mp.link.lcp.his_mru); } } static void bundle_LayerFinish(void *v, struct fsm *fp) { /* The given fsm is now down (fp cannot be NULL) * * If it's the last LCP, fsm_Down all NCPs * If it's the last NCP, fsm_Close all LCPs */ struct bundle *bundle = (struct bundle *)v; struct datalink *dl; if (fp->proto == PROTO_IPCP) { if (bundle_Phase(bundle) != PHASE_DEAD) bundle_NewPhase(bundle, PHASE_TERMINATE); for (dl = bundle->links; dl; dl = dl->next) datalink_Close(dl, 0); fsm_Down(fp); fsm_Close(fp); } else if (fp->proto == PROTO_LCP) { int others_active; others_active = 0; for (dl = bundle->links; dl; dl = dl->next) if (fp != &dl->physical->link.lcp.fsm && dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) others_active++; if (!others_active) { fsm_Down(&bundle->ncp.ipcp.fsm); fsm_Close(&bundle->ncp.ipcp.fsm); /* ST_INITIAL please */ } } } int bundle_LinkIsUp(const struct bundle *bundle) { return bundle->ncp.ipcp.fsm.state == ST_OPENED; } void bundle_Close(struct bundle *bundle, const char *name, int staydown) { /* * 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; if (bundle->phase == PHASE_TERMINATE || bundle->phase == PHASE_DEAD) return; 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) { if (staydown) datalink_StayDown(dl); } 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) { if (bundle->ncp.ipcp.fsm.state > ST_CLOSED || bundle->ncp.ipcp.fsm.state == ST_STARTING) fsm_Close(&bundle->ncp.ipcp.fsm); else { if (bundle->ncp.ipcp.fsm.state > ST_INITIAL) { fsm_Close(&bundle->ncp.ipcp.fsm); fsm_Down(&bundle->ncp.ipcp.fsm); } for (dl = bundle->links; dl; dl = dl->next) datalink_Close(dl, staydown); } } else if (this_dl && this_dl->state != DATALINK_CLOSED && this_dl->state != DATALINK_HANGUP) datalink_Close(this_dl, staydown); } void bundle_Down(struct bundle *bundle) { struct datalink *dl; for (dl = bundle->links; dl; dl = dl->next) datalink_Down(dl, 1); } static int bundle_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n) { struct bundle *bundle = descriptor2bundle(d); struct datalink *dl; struct descriptor *desc; int result; result = 0; for (dl = bundle->links; dl; dl = dl->next) result += descriptor_UpdateSet(&dl->desc, r, w, e, n); for (desc = bundle->desc.next; desc; desc = desc->next) result += descriptor_UpdateSet(desc, r, w, e, n); /* If there are aren't many packets queued, look for some more. */ if (r && bundle->links && bundle_FillQueues(bundle) < 20) { if (*n < bundle->dev.fd + 1) *n = bundle->dev.fd + 1; FD_SET(bundle->dev.fd, r); log_Printf(LogTIMER, "tun: fdset(r) %d\n", bundle->dev.fd); result++; } return result; } static int bundle_IsSet(struct descriptor *d, const fd_set *fdset) { struct bundle *bundle = descriptor2bundle(d); struct datalink *dl; struct descriptor *desc; for (dl = bundle->links; dl; dl = dl->next) if (descriptor_IsSet(&dl->desc, fdset)) return 1; for (desc = bundle->desc.next; desc; desc = desc->next) if (descriptor_IsSet(desc, fdset)) return 1; return FD_ISSET(bundle->dev.fd, fdset); } static void bundle_DescriptorRead(struct descriptor *d, struct bundle *bundle, const fd_set *fdset) { struct datalink *dl; struct descriptor *desc; for (dl = bundle->links; dl; dl = dl->next) if (descriptor_IsSet(&dl->desc, fdset)) descriptor_Read(&dl->desc, bundle, fdset); for (desc = bundle->desc.next; desc; desc = desc->next) if (descriptor_IsSet(desc, fdset)) descriptor_Read(desc, bundle, fdset); if (FD_ISSET(bundle->dev.fd, fdset)) { struct tun_data tun; int n, pri; /* something to read from tun */ n = read(bundle->dev.fd, &tun, sizeof tun); if (n < 0) { log_Printf(LogERROR, "read from tun: %s\n", strerror(errno)); return; } n -= sizeof tun - sizeof tun.data; if (n <= 0) { log_Printf(LogERROR, "read from tun: Only %d bytes read\n", n); return; } if (!tun_check_header(tun, AF_INET)) return; if (((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, tun.data, n, &bundle->filter.in); if (pri >= 0) { struct mbuf *bp; #ifndef NOALIAS if (alias_IsEnabled()) { (*PacketAlias.In)(tun.data, sizeof tun.data); n = ntohs(((struct ip *)tun.data)->ip_len); } #endif bp = mbuf_Alloc(n, MB_IPIN); memcpy(MBUF_CTOP(bp), tun.data, n); ip_Input(bundle, bp); 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 tunnel * device until IPCP 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 */ if ((pri = PacketCheck(bundle, tun.data, n, &bundle->filter.dial)) >= 0) bundle_Open(bundle, NULL, PHYS_DEMAND); 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; } pri = PacketCheck(bundle, tun.data, n, &bundle->filter.out); if (pri >= 0) { #ifndef NOALIAS if (alias_IsEnabled()) { (*PacketAlias.Out)(tun.data, sizeof tun.data); n = ntohs(((struct ip *)tun.data)->ip_len); } #endif ip_Enqueue(pri, tun.data, n); } } } static void bundle_DescriptorWrite(struct descriptor *d, struct bundle *bundle, const fd_set *fdset) { struct datalink *dl; struct descriptor *desc; for (dl = bundle->links; dl; dl = dl->next) if (descriptor_IsSet(&dl->desc, fdset)) descriptor_Write(&dl->desc, bundle, fdset); for (desc = bundle->desc.next; desc; desc = desc->next) if (descriptor_IsSet(desc, fdset)) descriptor_Write(desc, bundle, fdset); } struct bundle * bundle_Create(const char *prefix, struct prompt *prompt, int type) { int s, enoentcount, err; struct ifreq ifrq; static struct bundle bundle; /* there can be only one */ if (bundle.ifp.Name != NULL) { /* Already allocated ! */ log_Printf(LogERROR, "bundle_Create: There's only one BUNDLE !\n"); return NULL; } err = ENOENT; enoentcount = 0; for (bundle.unit = 0; ; 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) { err = errno; break; } else if (errno == ENOENT) { if (++enoentcount > 2) break; } else err = errno; } if (bundle.dev.fd < 0) { log_Printf(LogWARN, "No available tunnel devices found (%s).\n", strerror(err)); return NULL; } log_SetTun(bundle.unit); s = socket(AF_INET, SOCK_DGRAM, 0); if (s < 0) { log_Printf(LogERROR, "bundle_Create: socket(): %s\n", strerror(errno)); close(bundle.dev.fd); return NULL; } bundle.ifp.Name = strrchr(bundle.dev.Name, '/'); if (bundle.ifp.Name == NULL) bundle.ifp.Name = bundle.dev.Name; else bundle.ifp.Name++; /* * Now, bring up the interface. */ memset(&ifrq, '\0', sizeof ifrq); strncpy(ifrq.ifr_name, bundle.ifp.Name, sizeof ifrq.ifr_name - 1); ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0'; if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) { log_Printf(LogERROR, "OpenTunnel: ioctl(SIOCGIFFLAGS): %s\n", strerror(errno)); close(s); close(bundle.dev.fd); bundle.ifp.Name = NULL; return NULL; } ifrq.ifr_flags |= IFF_UP; if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) { log_Printf(LogERROR, "OpenTunnel: ioctl(SIOCSIFFLAGS): %s\n", strerror(errno)); close(s); close(bundle.dev.fd); bundle.ifp.Name = NULL; return NULL; } close(s); if ((bundle.ifp.Index = GetIfIndex(bundle.ifp.Name)) < 0) { log_Printf(LogERROR, "OpenTunnel: Can't find interface index.\n"); close(bundle.dev.fd); bundle.ifp.Name = NULL; return NULL; } prompt_Printf(prompt, "Using interface: %s\n", bundle.ifp.Name); log_Printf(LogPHASE, "Using interface: %s\n", bundle.ifp.Name); bundle.ifp.Speed = 0; bundle.routing_seq = 0; bundle.phase = PHASE_DEAD; bundle.CleaningUp = 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.auth.name = '\0'; *bundle.cfg.auth.key = '\0'; bundle.cfg.opt = OPT_SROUTES | OPT_IDCHECK | OPT_LOOPBACK | OPT_THROUGHPUT | OPT_UTMP; *bundle.cfg.label = '\0'; bundle.cfg.mtu = DEF_MTU; bundle.phys_type = type; bundle.links = datalink_Create("deflink", &bundle, type); if (bundle.links == NULL) { log_Printf(LogERROR, "Cannot create data link: %s\n", strerror(errno)); close(bundle.dev.fd); bundle.ifp.Name = NULL; return NULL; } bundle.desc.type = BUNDLE_DESCRIPTOR; bundle.desc.next = NULL; bundle.desc.UpdateSet = bundle_UpdateSet; bundle.desc.IsSet = bundle_IsSet; bundle.desc.Read = bundle_DescriptorRead; bundle.desc.Write = bundle_DescriptorWrite; mp_Init(&bundle.ncp.mp, &bundle); /* Send over the first physical link by default */ ipcp_Init(&bundle.ncp.ipcp, &bundle, &bundle.links->physical->link, &bundle.fsm); 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; memset(&bundle.idle.timer, '\0', sizeof bundle.idle.timer); bundle.idle.done = 0; bundle.notify.fd = -1; /* Clean out any leftover crud */ bundle_CleanInterface(&bundle); if (prompt) { /* Retrospectively introduce ourselves to the prompt */ prompt->bundle = &bundle; bundle_RegisterDescriptor(&bundle, &prompt->desc); } return &bundle; } static void bundle_DownInterface(struct bundle *bundle) { struct ifreq ifrq; int s; route_IfDelete(bundle, 1); s = ID0socket(AF_INET, SOCK_DGRAM, 0); if (s < 0) { log_Printf(LogERROR, "bundle_DownInterface: socket: %s\n", strerror(errno)); return; } memset(&ifrq, '\0', sizeof ifrq); strncpy(ifrq.ifr_name, bundle->ifp.Name, sizeof ifrq.ifr_name - 1); ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0'; if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) { log_Printf(LogERROR, "bundle_DownInterface: ioctl(SIOCGIFFLAGS): %s\n", strerror(errno)); close(s); return; } ifrq.ifr_flags &= ~IFF_UP; if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) { log_Printf(LogERROR, "bundle_DownInterface: ioctl(SIOCSIFFLAGS): %s\n", strerror(errno)); close(s); return; } close(s); } void bundle_Destroy(struct bundle *bundle) { struct datalink *dl; struct descriptor *desc, *ndesc; + /* In case we're dropping out with an exception :-O */ + mp_Down(&bundle->ncp.mp); + if (bundle->phys_type & PHYS_DEMAND) { ipcp_CleanInterface(&bundle->ncp.ipcp); bundle_DownInterface(bundle); } dl = bundle->links; while (dl) dl = datalink_Destroy(dl); bundle_Notify(bundle, EX_ERRDEAD); desc = bundle->desc.next; while (desc) { ndesc = desc->next; if (desc->type == PROMPT_DESCRIPTOR) prompt_Destroy((struct prompt *)desc, 1); else log_Printf(LogERROR, "bundle_Destroy: Don't know how to delete descriptor" " type %d\n", desc->type); desc = ndesc; } bundle->desc.next = NULL; bundle->ifp.Name = NULL; } struct rtmsg { struct rt_msghdr m_rtm; char m_space[64]; }; int bundle_SetRoute(struct bundle *bundle, int cmd, struct in_addr dst, struct in_addr gateway, struct in_addr mask, int bang) { struct rtmsg rtmes; int s, nb, wb; char *cp; const char *cmdstr; struct sockaddr_in rtdata; int result = 1; if (bang) cmdstr = (cmd == RTM_ADD ? "Add!" : "Delete!"); else cmdstr = (cmd == RTM_ADD ? "Add" : "Delete"); s = ID0socket(PF_ROUTE, SOCK_RAW, 0); if (s < 0) { log_Printf(LogERROR, "bundle_SetRoute: socket(): %s\n", strerror(errno)); return result; } memset(&rtmes, '\0', sizeof rtmes); rtmes.m_rtm.rtm_version = RTM_VERSION; rtmes.m_rtm.rtm_type = cmd; rtmes.m_rtm.rtm_addrs = RTA_DST; rtmes.m_rtm.rtm_seq = ++bundle->routing_seq; rtmes.m_rtm.rtm_pid = getpid(); rtmes.m_rtm.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC; memset(&rtdata, '\0', sizeof rtdata); rtdata.sin_len = sizeof rtdata; rtdata.sin_family = AF_INET; rtdata.sin_port = 0; rtdata.sin_addr = dst; cp = rtmes.m_space; memcpy(cp, &rtdata, rtdata.sin_len); cp += rtdata.sin_len; if (cmd == RTM_ADD) { if (gateway.s_addr == INADDR_ANY) { /* Add a route through the interface */ struct sockaddr_dl dl; const char *iname; int ilen; iname = Index2Nam(bundle->ifp.Index); ilen = strlen(iname); dl.sdl_len = sizeof dl - sizeof dl.sdl_data + ilen; dl.sdl_family = AF_LINK; dl.sdl_index = bundle->ifp.Index; dl.sdl_type = 0; dl.sdl_nlen = ilen; dl.sdl_alen = 0; dl.sdl_slen = 0; strncpy(dl.sdl_data, iname, sizeof dl.sdl_data); memcpy(cp, &dl, dl.sdl_len); cp += dl.sdl_len; rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY; } else { rtdata.sin_addr = gateway; memcpy(cp, &rtdata, rtdata.sin_len); cp += rtdata.sin_len; rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY; } } if (dst.s_addr == INADDR_ANY) mask.s_addr = INADDR_ANY; if (cmd == RTM_ADD || dst.s_addr == INADDR_ANY) { rtdata.sin_addr = mask; memcpy(cp, &rtdata, rtdata.sin_len); cp += rtdata.sin_len; rtmes.m_rtm.rtm_addrs |= RTA_NETMASK; } nb = cp - (char *) &rtmes; rtmes.m_rtm.rtm_msglen = nb; wb = ID0write(s, &rtmes, nb); if (wb < 0) { log_Printf(LogTCPIP, "bundle_SetRoute failure:\n"); log_Printf(LogTCPIP, "bundle_SetRoute: Cmd = %s\n", cmdstr); log_Printf(LogTCPIP, "bundle_SetRoute: Dst = %s\n", inet_ntoa(dst)); log_Printf(LogTCPIP, "bundle_SetRoute: Gateway = %s\n", inet_ntoa(gateway)); log_Printf(LogTCPIP, "bundle_SetRoute: Mask = %s\n", inet_ntoa(mask)); failed: if (cmd == RTM_ADD && (rtmes.m_rtm.rtm_errno == EEXIST || (rtmes.m_rtm.rtm_errno == 0 && errno == EEXIST))) { if (!bang) { log_Printf(LogWARN, "Add route failed: %s already exists\n", inet_ntoa(dst)); result = 0; /* Don't add to our dynamic list */ } else { rtmes.m_rtm.rtm_type = cmd = RTM_CHANGE; if ((wb = ID0write(s, &rtmes, nb)) < 0) goto failed; } } else if (cmd == RTM_DELETE && (rtmes.m_rtm.rtm_errno == ESRCH || (rtmes.m_rtm.rtm_errno == 0 && errno == ESRCH))) { if (!bang) log_Printf(LogWARN, "Del route failed: %s: Non-existent\n", inet_ntoa(dst)); } else if (rtmes.m_rtm.rtm_errno == 0) log_Printf(LogWARN, "%s route failed: %s: errno: %s\n", cmdstr, inet_ntoa(dst), strerror(errno)); else log_Printf(LogWARN, "%s route failed: %s: %s\n", cmdstr, inet_ntoa(dst), strerror(rtmes.m_rtm.rtm_errno)); } log_Printf(LogDEBUG, "wrote %d: cmd = %s, dst = %x, gateway = %x\n", wb, cmdstr, (unsigned)dst.s_addr, (unsigned)gateway.s_addr); close(s); return result; } void bundle_LinkClosed(struct bundle *bundle, struct datalink *dl) { /* * Our datalink has closed. * UpdateSet() will remove 1OFF and STDIN links. * If it's the last data link, enter phase DEAD. */ struct datalink *odl; int other_links; 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_DEMAND) bundle_DownInterface(bundle); if (bundle->ncp.ipcp.fsm.state > ST_CLOSED || bundle->ncp.ipcp.fsm.state == ST_STARTING) { fsm_Down(&bundle->ncp.ipcp.fsm); fsm_Close(&bundle->ncp.ipcp.fsm); /* ST_INITIAL please */ } bundle_NewPhase(bundle, PHASE_DEAD); bundle_DisplayPrompt(bundle); } } void bundle_Open(struct bundle *bundle, const char *name, int mask) { /* * 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) datalink_Up(dl, 1, 1); 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_FillQueues(struct bundle *bundle) { int total; if (bundle->ncp.mp.active) total = mp_FillQueues(bundle); else { struct datalink *dl; int add; for (total = 0, dl = bundle->links; dl; dl = dl->next) if (dl->state == DATALINK_OPEN) { add = link_QueueLen(&dl->physical->link); if (add == 0 && dl->physical->out == NULL) add = ip_FlushPacket(&dl->physical->link, bundle); total += add; } } return total + ip_QueueLen(); } int bundle_ShowLinks(struct cmdargs const *arg) { struct datalink *dl; for (dl = arg->bundle->links; dl; dl = dl->next) { prompt_Printf(arg->prompt, "Name: %s [%s]", dl->name, datalink_State(dl)); if (dl->physical->link.throughput.rolling && dl->state == DATALINK_OPEN) prompt_Printf(arg->prompt, " (weight %d, %d bytes/sec)", dl->mp.weight, dl->physical->link.throughput.OctetsPerSecond); prompt_Printf(arg->prompt, "\n"); } return 0; } static const char * optval(struct bundle *bundle, int bit) { return (bundle->cfg.opt & bit) ? "enabled" : "disabled"; } int bundle_ShowStatus(struct cmdargs const *arg) { int remaining; prompt_Printf(arg->prompt, "Phase %s\n", bundle_PhaseName(arg->bundle)); prompt_Printf(arg->prompt, " Device: %s\n", arg->bundle->dev.Name); prompt_Printf(arg->prompt, " Interface: %s @ %lubps\n", arg->bundle->ifp.Name, arg->bundle->ifp.Speed); 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, " Idle Timer: "); if (arg->bundle->cfg.idle_timeout) { prompt_Printf(arg->prompt, "%ds", arg->bundle->cfg.idle_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, " MTU: "); if (arg->bundle->cfg.mtu) prompt_Printf(arg->prompt, "%d\n", arg->bundle->cfg.mtu); else prompt_Printf(arg->prompt, "unspecified\n"); prompt_Printf(arg->prompt, " Sticky Routes: %s\n", optval(arg->bundle, OPT_SROUTES)); prompt_Printf(arg->prompt, " ID check: %s\n", optval(arg->bundle, OPT_IDCHECK)); prompt_Printf(arg->prompt, " Loopback: %s\n", optval(arg->bundle, OPT_LOOPBACK)); prompt_Printf(arg->prompt, " PasswdAuth: %s\n", optval(arg->bundle, OPT_PASSWDAUTH)); prompt_Printf(arg->prompt, " Proxy: %s\n", optval(arg->bundle, OPT_PROXY)); prompt_Printf(arg->prompt, " Throughput: %s\n", optval(arg->bundle, OPT_THROUGHPUT)); prompt_Printf(arg->prompt, " Utmp Logging: %s\n", optval(arg->bundle, OPT_UTMP)); return 0; } static void bundle_IdleTimeout(void *v) { struct bundle *bundle = (struct bundle *)v; bundle->idle.done = 0; log_Printf(LogPHASE, "Idle timer expired.\n"); bundle_Close(bundle, NULL, 1); } /* * Start Idle timer. If timeout is reached, we call bundle_Close() to * close LCP and link. */ void bundle_StartIdleTimer(struct bundle *bundle) { if (!(bundle->phys_type & (PHYS_DEDICATED|PHYS_PERM))) { timer_Stop(&bundle->idle.timer); if (bundle->cfg.idle_timeout) { bundle->idle.timer.func = bundle_IdleTimeout; bundle->idle.timer.name = "idle"; bundle->idle.timer.load = bundle->cfg.idle_timeout * SECTICKS; bundle->idle.timer.arg = bundle; timer_Start(&bundle->idle.timer); bundle->idle.done = time(NULL) + bundle->cfg.idle_timeout; } } } void bundle_SetIdleTimer(struct bundle *bundle, int value) { bundle->cfg.idle_timeout = value; if (bundle_LinkIsUp(bundle)) bundle_StartIdleTimer(bundle); } void bundle_StopIdleTimer(struct bundle *bundle) { timer_Stop(&bundle->idle.timer); bundle->idle.done = 0; } int bundle_RemainingIdleTime(struct bundle *bundle) { if (bundle->idle.done) return bundle->idle.done - time(NULL); return -1; } int bundle_IsDead(struct bundle *bundle) { return !bundle->links || (bundle->phase == PHASE_DEAD && bundle->CleaningUp); } void bundle_RegisterDescriptor(struct bundle *bundle, struct descriptor *d) { d->next = bundle->desc.next; bundle->desc.next = d; } void bundle_UnRegisterDescriptor(struct bundle *bundle, struct descriptor *d) { struct descriptor **desc; for (desc = &bundle->desc.next; *desc; desc = &(*desc)->next) if (*desc == d) { *desc = d->next; break; } } void bundle_DelPromptDescriptors(struct bundle *bundle, struct server *s) { struct descriptor **desc; struct prompt *p; desc = &bundle->desc.next; while (*desc) { if ((*desc)->type == PROMPT_DESCRIPTOR) { p = (struct prompt *)*desc; if (p->owner == s) { prompt_Destroy(p, 1); desc = &bundle->desc.next; continue; } } desc = &(*desc)->next; } } void bundle_DisplayPrompt(struct bundle *bundle) { struct descriptor **desc; for (desc = &bundle->desc.next; *desc; desc = &(*desc)->next) if ((*desc)->type == PROMPT_DESCRIPTOR) prompt_Required((struct prompt *)*desc); } void bundle_WriteTermPrompt(struct bundle *bundle, struct datalink *dl, const char *data, int len) { struct descriptor *desc; struct prompt *p; for (desc = bundle->desc.next; desc; desc = desc->next) if (desc->type == PROMPT_DESCRIPTOR) { p = (struct prompt *)desc; if (prompt_IsTermMode(p, dl)) prompt_Printf(p, "%.*s", len, data); } } void bundle_SetTtyCommandMode(struct bundle *bundle, struct datalink *dl) { struct descriptor *desc; struct prompt *p; for (desc = bundle->desc.next; desc; desc = desc->next) if (desc->type == PROMPT_DESCRIPTOR) { p = (struct prompt *)desc; if (prompt_IsTermMode(p, dl)) prompt_TtyCommandMode(p); } } static void bundle_GenPhysType(struct bundle *bundle) { struct datalink *dl; bundle->phys_type = 0; for (dl = bundle->links; dl; dl = dl->next) bundle->phys_type |= dl->physical->type; } int bundle_DatalinkClone(struct bundle *bundle, struct datalink *dl, const char *name) { struct datalink *ndl; ndl = bundle2datalink(bundle, name); if (!ndl) { ndl = datalink_Clone(dl, name); ndl->next = dl->next; dl->next = ndl; bundle_GenPhysType(bundle); return 1; } log_Printf(LogWARN, "Clone: %s: name already exists\n", ndl->name); return 0; } void bundle_DatalinkRemove(struct bundle *bundle, struct datalink *dl) { struct datalink **dlp; if (dl->state == DATALINK_CLOSED) for (dlp = &bundle->links; *dlp; dlp = &(*dlp)->next) if (*dlp == dl) { *dlp = datalink_Destroy(dl); break; } bundle_GenPhysType(bundle); } void bundle_CleanDatalinks(struct bundle *bundle) { struct datalink **dlp = &bundle->links; while (*dlp) if ((*dlp)->state == DATALINK_CLOSED && (*dlp)->physical->type & (PHYS_DIRECT|PHYS_1OFF)) *dlp = datalink_Destroy(*dlp); else dlp = &(*dlp)->next; bundle_GenPhysType(bundle); } 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; } void bundle_ReceiveDatalink(struct bundle *bundle, int s, struct sockaddr_un *sun) { char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int)]; struct cmsghdr *cmsg = (struct cmsghdr *)cmsgbuf; struct msghdr msg; struct iovec iov[SCATTER_SEGMENTS]; struct datalink *dl; int niov, link_fd, expect, f; log_Printf(LogPHASE, "Receiving datalink\n"); /* Create our scatter/gather array */ niov = 1; iov[0].iov_len = strlen(Version) + 1; iov[0].iov_base = (char *)malloc(iov[0].iov_len); if (datalink2iov(NULL, iov, &niov, sizeof iov / sizeof *iov) == -1) return; for (f = expect = 0; f < niov; f++) expect += iov[f].iov_len; /* Set up our message */ cmsg->cmsg_len = sizeof cmsgbuf; cmsg->cmsg_level = SOL_SOCKET; cmsg->cmsg_type = SCM_RIGHTS; memset(&msg, '\0', sizeof msg); msg.msg_name = (caddr_t)sun; msg.msg_namelen = sizeof *sun; msg.msg_iov = iov; msg.msg_iovlen = niov; msg.msg_control = cmsgbuf; msg.msg_controllen = sizeof cmsgbuf; log_Printf(LogDEBUG, "Expecting %d scatter/gather bytes\n", expect); f = expect + 100; setsockopt(s, SOL_SOCKET, SO_RCVBUF, &f, sizeof f); if ((f = recvmsg(s, &msg, MSG_WAITALL)) != expect) { if (f == -1) log_Printf(LogERROR, "Failed recvmsg: %s\n", strerror(errno)); else log_Printf(LogERROR, "Failed recvmsg: Got %d, not %d\n", f, expect); while (niov--) free(iov[niov].iov_base); return; } /* We've successfully received an open file descriptor through our socket */ link_fd = *(int *)CMSG_DATA(cmsg); write(s, "!",1 ); /* ACK */ 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, iov[0].iov_base, Version); close(link_fd); while (niov--) free(iov[niov].iov_base); return; } niov = 1; dl = iov2datalink(bundle, iov, &niov, sizeof iov / sizeof *iov, link_fd); if (dl) { dl->next = bundle->links; bundle->links = dl; bundle_GenPhysType(bundle); datalink_AuthOk(dl); } else close(link_fd); free(iov[0].iov_base); } void bundle_SendDatalink(struct datalink *dl, int s, struct sockaddr_un *sun) { char cmsgbuf[sizeof(struct cmsghdr) + sizeof(int)], ack; struct cmsghdr *cmsg = (struct cmsghdr *)cmsgbuf; struct msghdr msg; struct iovec iov[SCATTER_SEGMENTS]; int niov, link_fd, f, expect; struct datalink **pdl; struct bundle *bundle = dl->bundle; log_Printf(LogPHASE, "Transmitting datalink %s\n", dl->name); /* First, un-hook the datalink */ for (pdl = &bundle->links; *pdl; pdl = &(*pdl)->next) if (*pdl == dl) { *pdl = dl->next; dl->next = NULL; break; } /* Build our scatter/gather array */ iov[0].iov_len = strlen(Version) + 1; iov[0].iov_base = strdup(Version); niov = 1; link_fd = datalink2iov(dl, iov, &niov, sizeof iov / sizeof *iov); if (link_fd != -1) { cmsg->cmsg_len = sizeof cmsgbuf; cmsg->cmsg_level = SOL_SOCKET; cmsg->cmsg_type = SCM_RIGHTS; *(int *)CMSG_DATA(cmsg) = link_fd; memset(&msg, '\0', sizeof msg); msg.msg_name = (caddr_t)sun; msg.msg_namelen = sizeof *sun; msg.msg_iov = iov; msg.msg_iovlen = niov; msg.msg_control = cmsgbuf; msg.msg_controllen = sizeof cmsgbuf; for (f = expect = 0; f < niov; f++) expect += iov[f].iov_len; log_Printf(LogDEBUG, "Sending %d bytes in scatter/gather array\n", expect); f = expect + SOCKET_OVERHEAD; setsockopt(s, SOL_SOCKET, SO_SNDBUF, &f, sizeof f); if (sendmsg(s, &msg, 0) == -1) log_Printf(LogERROR, "Failed sendmsg: %s\n", strerror(errno)); /* We must get the ACK before closing the descriptor ! */ read(s, &ack, 1); close(link_fd); } while (niov--) free(iov[niov].iov_base); } diff --git a/usr.sbin/ppp/datalink.c b/usr.sbin/ppp/datalink.c index 507356808b7f..de8e8c52859a 100644 --- a/usr.sbin/ppp/datalink.c +++ b/usr.sbin/ppp/datalink.c @@ -1,1068 +1,1069 @@ /*- * Copyright (c) 1998 Brian Somers * 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. * - * $Id: datalink.c,v 1.1.2.57 1998/05/08 01:15:05 brian Exp $ + * $Id: datalink.c,v 1.1.2.58 1998/05/09 13:52:12 brian Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include "mbuf.h" #include "log.h" #include "defs.h" #include "timer.h" #include "fsm.h" #include "lcp.h" #include "descriptor.h" #include "lqr.h" #include "hdlc.h" #include "async.h" #include "throughput.h" #include "ccp.h" #include "link.h" #include "physical.h" #include "iplist.h" #include "slcompress.h" #include "ipcp.h" #include "filter.h" #include "mp.h" #include "bundle.h" #include "chat.h" #include "auth.h" #include "modem.h" #include "prompt.h" #include "lcpproto.h" #include "pap.h" #include "chap.h" #include "command.h" #include "datalink.h" static void datalink_LoginDone(struct datalink *); static void datalink_NewState(struct datalink *, int); static void datalink_OpenTimeout(void *v) { struct datalink *dl = (struct datalink *)v; timer_Stop(&dl->dial_timer); if (dl->state == DATALINK_OPENING) log_Printf(LogPHASE, "%s: Redial timer expired.\n", dl->name); } static void datalink_StartDialTimer(struct datalink *dl, int Timeout) { timer_Stop(&dl->dial_timer); if (Timeout) { if (Timeout > 0) dl->dial_timer.load = Timeout * SECTICKS; else dl->dial_timer.load = (random() % DIAL_TIMEOUT) * SECTICKS; dl->dial_timer.func = datalink_OpenTimeout; dl->dial_timer.name = "dial"; dl->dial_timer.arg = dl; timer_Start(&dl->dial_timer); if (dl->state == DATALINK_OPENING) log_Printf(LogPHASE, "%s: Enter pause (%d) for redialing.\n", dl->name, Timeout); } } static void datalink_HangupDone(struct datalink *dl) { if (dl->physical->type == PHYS_DEDICATED && !dl->bundle->CleaningUp && physical_GetFD(dl->physical) != -1) { /* Don't close our modem if the link is dedicated */ datalink_LoginDone(dl); return; } modem_Close(dl->physical); dl->phone.chosen = "N/A"; if (dl->bundle->CleaningUp || (dl->physical->type == PHYS_DIRECT) || ((!dl->dial_tries || (dl->dial_tries < 0 && !dl->reconnect_tries)) && !(dl->physical->type & (PHYS_PERM|PHYS_DEDICATED)))) { datalink_NewState(dl, DATALINK_CLOSED); dl->dial_tries = -1; dl->reconnect_tries = 0; bundle_LinkClosed(dl->bundle, dl); if (!dl->bundle->CleaningUp) datalink_StartDialTimer(dl, dl->cfg.dial.timeout); } else { datalink_NewState(dl, DATALINK_OPENING); if (dl->dial_tries < 0) { datalink_StartDialTimer(dl, dl->cfg.reconnect.timeout); dl->dial_tries = dl->cfg.dial.max; dl->reconnect_tries--; } else { if (dl->phone.next == NULL) datalink_StartDialTimer(dl, dl->cfg.dial.timeout); else datalink_StartDialTimer(dl, dl->cfg.dial.next_timeout); } } } static const char * datalink_ChoosePhoneNumber(struct datalink *dl) { char *phone; if (dl->phone.alt == NULL) { if (dl->phone.next == NULL) { strncpy(dl->phone.list, dl->cfg.phone.list, sizeof dl->phone.list - 1); dl->phone.list[sizeof dl->phone.list - 1] = '\0'; dl->phone.next = dl->phone.list; } dl->phone.alt = strsep(&dl->phone.next, ":"); } phone = strsep(&dl->phone.alt, "|"); dl->phone.chosen = *phone ? phone : "[NONE]"; if (*phone) log_Printf(LogPHASE, "Phone: %s\n", phone); return phone; } static void datalink_LoginDone(struct datalink *dl) { if (!dl->script.packetmode) { dl->dial_tries = -1; datalink_NewState(dl, DATALINK_READY); } else if (modem_Raw(dl->physical, dl->bundle) < 0) { dl->dial_tries = 0; log_Printf(LogWARN, "datalink_LoginDone: Not connected.\n"); if (dl->script.run) { datalink_NewState(dl, DATALINK_HANGUP); modem_Offline(dl->physical); chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL); } else { if (dl->physical->type == PHYS_DEDICATED) /* force a redial timeout */ modem_Close(dl->physical); datalink_HangupDone(dl); } } else { dl->dial_tries = -1; hdlc_Init(&dl->physical->hdlc, &dl->physical->link.lcp); async_Init(&dl->physical->async); lcp_Setup(&dl->physical->link.lcp, dl->state == DATALINK_READY ? 0 : dl->physical->link.lcp.cfg.openmode); ccp_Setup(&dl->physical->link.ccp); datalink_NewState(dl, DATALINK_LCP); fsm_Up(&dl->physical->link.lcp.fsm); fsm_Open(&dl->physical->link.lcp.fsm); } } static int datalink_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n) { struct datalink *dl = descriptor2datalink(d); int result; result = 0; switch (dl->state) { case DATALINK_CLOSED: if ((dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED|PHYS_1OFF)) && !bundle_IsDead(dl->bundle)) /* * Our first time in - DEDICATED never comes down, and STDIN & 1OFF * get deleted when they enter DATALINK_CLOSED. Go to * DATALINK_OPENING via datalink_Up() and fall through. */ datalink_Up(dl, 1, 1); else break; /* fall through */ case DATALINK_OPENING: if (dl->dial_timer.state != TIMER_RUNNING) { if (--dl->dial_tries < 0) dl->dial_tries = 0; if (modem_Open(dl->physical, dl->bundle) >= 0) { if (dl->script.run) { datalink_NewState(dl, DATALINK_DIAL); chat_Init(&dl->chat, dl->physical, dl->cfg.script.dial, 1, datalink_ChoosePhoneNumber(dl)); if (!(dl->physical->type & (PHYS_PERM|PHYS_DEDICATED)) && dl->cfg.dial.max) log_Printf(LogCHAT, "%s: Dial attempt %u of %d\n", dl->name, dl->cfg.dial.max - dl->dial_tries, dl->cfg.dial.max); return datalink_UpdateSet(d, r, w, e, n); } else datalink_LoginDone(dl); } else { if (!(dl->physical->type & (PHYS_PERM|PHYS_DEDICATED)) && dl->cfg.dial.max) log_Printf(LogCHAT, "Failed to open modem (attempt %u of %d)\n", dl->cfg.dial.max - dl->dial_tries, dl->cfg.dial.max); else log_Printf(LogCHAT, "Failed to open modem\n"); if (dl->bundle->CleaningUp || (!(dl->physical->type & (PHYS_PERM|PHYS_DEDICATED)) && dl->cfg.dial.max && dl->dial_tries == 0)) { datalink_NewState(dl, DATALINK_CLOSED); dl->reconnect_tries = 0; dl->dial_tries = -1; bundle_LinkClosed(dl->bundle, dl); } if (!dl->bundle->CleaningUp) datalink_StartDialTimer(dl, dl->cfg.dial.timeout); } } break; case DATALINK_HANGUP: case DATALINK_DIAL: case DATALINK_LOGIN: result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n); switch (dl->chat.state) { case CHAT_DONE: /* script succeeded */ chat_Destroy(&dl->chat); switch(dl->state) { case DATALINK_HANGUP: datalink_HangupDone(dl); break; case DATALINK_DIAL: datalink_NewState(dl, DATALINK_LOGIN); chat_Init(&dl->chat, dl->physical, dl->cfg.script.login, 0, NULL); return datalink_UpdateSet(d, r, w, e, n); case DATALINK_LOGIN: datalink_LoginDone(dl); break; } break; case CHAT_FAILED: /* Going down - script failed */ log_Printf(LogWARN, "Chat script failed\n"); chat_Destroy(&dl->chat); switch(dl->state) { case DATALINK_HANGUP: datalink_HangupDone(dl); break; case DATALINK_DIAL: case DATALINK_LOGIN: datalink_NewState(dl, DATALINK_HANGUP); modem_Offline(dl->physical); chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL); return datalink_UpdateSet(d, r, w, e, n); } break; } break; case DATALINK_READY: case DATALINK_LCP: case DATALINK_AUTH: case DATALINK_OPEN: if (dl == dl->bundle->ncp.mp.server.send.dl) /* Never read our descriptor if we're scheduled for transfer */ r = NULL; result = descriptor_UpdateSet(&dl->physical->desc, r, w, e, n); break; } return result; } static int datalink_IsSet(struct descriptor *d, const fd_set *fdset) { struct datalink *dl = descriptor2datalink(d); switch (dl->state) { case DATALINK_CLOSED: case DATALINK_OPENING: break; case DATALINK_HANGUP: case DATALINK_DIAL: case DATALINK_LOGIN: return descriptor_IsSet(&dl->chat.desc, fdset); case DATALINK_READY: case DATALINK_LCP: case DATALINK_AUTH: case DATALINK_OPEN: return descriptor_IsSet(&dl->physical->desc, fdset); } return 0; } static void datalink_Read(struct descriptor *d, struct bundle *bundle, const fd_set *fdset) { struct datalink *dl = descriptor2datalink(d); switch (dl->state) { case DATALINK_CLOSED: case DATALINK_OPENING: break; case DATALINK_HANGUP: case DATALINK_DIAL: case DATALINK_LOGIN: descriptor_Read(&dl->chat.desc, bundle, fdset); break; case DATALINK_READY: case DATALINK_LCP: case DATALINK_AUTH: case DATALINK_OPEN: descriptor_Read(&dl->physical->desc, bundle, fdset); break; } } static void datalink_Write(struct descriptor *d, struct bundle *bundle, const fd_set *fdset) { struct datalink *dl = descriptor2datalink(d); switch (dl->state) { case DATALINK_CLOSED: case DATALINK_OPENING: break; case DATALINK_HANGUP: case DATALINK_DIAL: case DATALINK_LOGIN: descriptor_Write(&dl->chat.desc, bundle, fdset); break; case DATALINK_READY: case DATALINK_LCP: case DATALINK_AUTH: case DATALINK_OPEN: descriptor_Write(&dl->physical->desc, bundle, fdset); break; } } static void datalink_ComeDown(struct datalink *dl, int stay) { if (stay) { dl->dial_tries = -1; dl->reconnect_tries = 0; } if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) { modem_Offline(dl->physical); if (dl->script.run && dl->state != DATALINK_OPENING) { datalink_NewState(dl, DATALINK_HANGUP); chat_Init(&dl->chat, dl->physical, dl->cfg.script.hangup, 1, NULL); } else datalink_HangupDone(dl); } } static void datalink_LayerStart(void *v, struct fsm *fp) { /* The given FSM is about to start up ! */ struct datalink *dl = (struct datalink *)v; if (fp->proto == PROTO_LCP) (*dl->parent->LayerStart)(dl->parent->object, fp); } static void datalink_LayerUp(void *v, struct fsm *fp) { /* The given fsm is now up */ struct datalink *dl = (struct datalink *)v; if (fp->proto == PROTO_LCP) { datalink_GotAuthname(dl, "", 0); dl->physical->link.lcp.auth_ineed = dl->physical->link.lcp.want_auth; dl->physical->link.lcp.auth_iwait = dl->physical->link.lcp.his_auth; if (dl->physical->link.lcp.his_auth || dl->physical->link.lcp.want_auth) { if (bundle_Phase(dl->bundle) == PHASE_ESTABLISH) bundle_NewPhase(dl->bundle, PHASE_AUTHENTICATE); log_Printf(LogPHASE, "%s: his = %s, mine = %s\n", dl->name, Auth2Nam(dl->physical->link.lcp.his_auth), Auth2Nam(dl->physical->link.lcp.want_auth)); if (dl->physical->link.lcp.his_auth == PROTO_PAP) auth_StartChallenge(&dl->pap, dl->physical, pap_SendChallenge); if (dl->physical->link.lcp.want_auth == PROTO_CHAP) auth_StartChallenge(&dl->chap.auth, dl->physical, chap_SendChallenge); } else datalink_AuthOk(dl); } } void datalink_GotAuthname(struct datalink *dl, const char *name, int len) { if (len >= sizeof dl->peer.authname) len = sizeof dl->peer.authname - 1; strncpy(dl->peer.authname, name, len); dl->peer.authname[len] = '\0'; } void datalink_AuthOk(struct datalink *dl) { if (dl->physical->link.lcp.want_mrru && dl->physical->link.lcp.his_mrru) { /* we've authenticated in multilink mode ! */ switch (mp_Up(&dl->bundle->ncp.mp, dl)) { case MP_LINKSENT: /* We've handed the link off to another ppp ! */ return; case MP_UP: auth_Select(dl->bundle, dl->peer.authname, dl->physical); break; case MP_ADDED: /* We were already in multilink mode ! */ break; case MP_FAILED: datalink_AuthNotOk(dl); return; } } else if (bundle_Phase(dl->bundle) == PHASE_NETWORK) { log_Printf(LogPHASE, "%s: Already in NETWORK phase\n", dl->name); datalink_AuthNotOk(dl); return; } else { dl->bundle->ncp.mp.peer = dl->peer; ipcp_SetLink(&dl->bundle->ncp.ipcp, &dl->physical->link); auth_Select(dl->bundle, dl->peer.authname, dl->physical); } fsm_Up(&dl->physical->link.ccp.fsm); fsm_Open(&dl->physical->link.ccp.fsm); datalink_NewState(dl, DATALINK_OPEN); bundle_NewPhase(dl->bundle, PHASE_NETWORK); (*dl->parent->LayerUp)(dl->parent->object, &dl->physical->link.lcp.fsm); } void datalink_AuthNotOk(struct datalink *dl) { datalink_NewState(dl, DATALINK_LCP); fsm_Close(&dl->physical->link.lcp.fsm); } static void datalink_LayerDown(void *v, struct fsm *fp) { /* The given FSM has been told to come down */ struct datalink *dl = (struct datalink *)v; if (fp->proto == PROTO_LCP) { switch (dl->state) { case DATALINK_OPEN: peerid_Init(&dl->peer); fsm_Down(&dl->physical->link.ccp.fsm); fsm_Close(&dl->physical->link.ccp.fsm); (*dl->parent->LayerDown)(dl->parent->object, fp); /* fall through */ case DATALINK_AUTH: timer_Stop(&dl->pap.authtimer); timer_Stop(&dl->chap.auth.authtimer); } datalink_NewState(dl, DATALINK_LCP); } } static void datalink_LayerFinish(void *v, struct fsm *fp) { /* The given fsm is now down */ struct datalink *dl = (struct datalink *)v; if (fp->proto == PROTO_LCP) { fsm_Down(fp); /* Bring us to INITIAL or STARTING */ (*dl->parent->LayerFinish)(dl->parent->object, fp); datalink_ComeDown(dl, 0); } } struct datalink * datalink_Create(const char *name, struct bundle *bundle, int type) { struct datalink *dl; dl = (struct datalink *)malloc(sizeof(struct datalink)); if (dl == NULL) return dl; dl->desc.type = DATALINK_DESCRIPTOR; dl->desc.next = NULL; dl->desc.UpdateSet = datalink_UpdateSet; dl->desc.IsSet = datalink_IsSet; dl->desc.Read = datalink_Read; dl->desc.Write = datalink_Write; dl->state = DATALINK_CLOSED; *dl->cfg.script.dial = '\0'; *dl->cfg.script.login = '\0'; *dl->cfg.script.hangup = '\0'; *dl->cfg.phone.list = '\0'; *dl->phone.list = '\0'; dl->phone.next = NULL; dl->phone.alt = NULL; dl->phone.chosen = "N/A"; dl->script.run = 1; dl->script.packetmode = 1; mp_linkInit(&dl->mp); dl->bundle = bundle; dl->next = NULL; memset(&dl->dial_timer, '\0', sizeof dl->dial_timer); dl->dial_tries = 0; dl->cfg.dial.max = 1; dl->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT; dl->cfg.dial.timeout = DIAL_TIMEOUT; dl->reconnect_tries = 0; dl->cfg.reconnect.max = 0; dl->cfg.reconnect.timeout = RECONNECT_TIMEOUT; dl->name = strdup(name); peerid_Init(&dl->peer); dl->parent = &bundle->fsm; dl->fsmp.LayerStart = datalink_LayerStart; dl->fsmp.LayerUp = datalink_LayerUp; dl->fsmp.LayerDown = datalink_LayerDown; dl->fsmp.LayerFinish = datalink_LayerFinish; dl->fsmp.object = dl; auth_Init(&dl->pap); auth_Init(&dl->chap.auth); if ((dl->physical = modem_Create(dl, type)) == NULL) { free(dl->name); free(dl); return NULL; } chat_Init(&dl->chat, dl->physical, NULL, 1, NULL); log_Printf(LogPHASE, "%s: Created in %s state\n", dl->name, datalink_State(dl)); return dl; } struct datalink * datalink_Clone(struct datalink *odl, const char *name) { struct datalink *dl; dl = (struct datalink *)malloc(sizeof(struct datalink)); if (dl == NULL) return dl; dl->desc.type = DATALINK_DESCRIPTOR; dl->desc.next = NULL; dl->desc.UpdateSet = datalink_UpdateSet; dl->desc.IsSet = datalink_IsSet; dl->desc.Read = datalink_Read; dl->desc.Write = datalink_Write; dl->state = DATALINK_CLOSED; memcpy(&dl->cfg, &odl->cfg, sizeof dl->cfg); mp_linkInit(&dl->mp); *dl->phone.list = '\0'; dl->phone.next = NULL; dl->phone.alt = NULL; dl->phone.chosen = "N/A"; dl->bundle = odl->bundle; dl->next = NULL; memset(&dl->dial_timer, '\0', sizeof dl->dial_timer); dl->dial_tries = 0; dl->reconnect_tries = 0; dl->name = strdup(name); peerid_Init(&dl->peer); dl->parent = odl->parent; memcpy(&dl->fsmp, &odl->fsmp, sizeof dl->fsmp); dl->fsmp.object = dl; auth_Init(&dl->pap); dl->pap.cfg.fsmretry = odl->pap.cfg.fsmretry; auth_Init(&dl->chap.auth); dl->chap.auth.cfg.fsmretry = odl->chap.auth.cfg.fsmretry; if ((dl->physical = modem_Create(dl, PHYS_MANUAL)) == NULL) { free(dl->name); free(dl); return NULL; } memcpy(&dl->physical->cfg, &odl->physical->cfg, sizeof dl->physical->cfg); memcpy(&dl->physical->link.lcp.cfg, &odl->physical->link.lcp.cfg, sizeof dl->physical->link.lcp.cfg); memcpy(&dl->physical->link.ccp.cfg, &odl->physical->link.ccp.cfg, sizeof dl->physical->link.ccp.cfg); memcpy(&dl->physical->async.cfg, &odl->physical->async.cfg, sizeof dl->physical->async.cfg); chat_Init(&dl->chat, dl->physical, NULL, 1, NULL); log_Printf(LogPHASE, "%s: Cloned in %s state\n", dl->name, datalink_State(dl)); return dl; } struct datalink * datalink_Destroy(struct datalink *dl) { struct datalink *result; if (dl->state != DATALINK_CLOSED) { log_Printf(LogERROR, "Oops, destroying a datalink in state %s\n", datalink_State(dl)); switch (dl->state) { case DATALINK_HANGUP: case DATALINK_DIAL: case DATALINK_LOGIN: chat_Destroy(&dl->chat); /* Gotta blat the timers ! */ break; } } result = dl->next; modem_Destroy(dl->physical); free(dl->name); free(dl); return result; } void datalink_Up(struct datalink *dl, int runscripts, int packetmode) { if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED)) /* Ignore scripts */ runscripts = 0; switch (dl->state) { case DATALINK_CLOSED: if (bundle_Phase(dl->bundle) == PHASE_DEAD || bundle_Phase(dl->bundle) == PHASE_TERMINATE) bundle_NewPhase(dl->bundle, PHASE_ESTABLISH); datalink_NewState(dl, DATALINK_OPENING); dl->reconnect_tries = dl->physical->type == PHYS_DIRECT ? 0 : dl->cfg.reconnect.max; dl->dial_tries = dl->cfg.dial.max; dl->script.run = runscripts; dl->script.packetmode = packetmode; break; case DATALINK_OPENING: if (!dl->script.run && runscripts) dl->script.run = 1; /* fall through */ case DATALINK_DIAL: case DATALINK_LOGIN: case DATALINK_READY: if (!dl->script.packetmode && packetmode) { dl->script.packetmode = 1; if (dl->state == DATALINK_READY) datalink_LoginDone(dl); } break; } } void datalink_Close(struct datalink *dl, int stay) { /* Please close */ switch (dl->state) { case DATALINK_OPEN: peerid_Init(&dl->peer); fsm_Down(&dl->physical->link.ccp.fsm); fsm_Close(&dl->physical->link.ccp.fsm); /* fall through */ case DATALINK_AUTH: case DATALINK_LCP: fsm_Close(&dl->physical->link.lcp.fsm); if (stay) { dl->dial_tries = -1; dl->reconnect_tries = 0; } break; default: datalink_ComeDown(dl, stay); } } void datalink_Down(struct datalink *dl, int stay) { /* Carrier is lost */ switch (dl->state) { case DATALINK_OPEN: peerid_Init(&dl->peer); fsm_Down(&dl->physical->link.ccp.fsm); fsm_Close(&dl->physical->link.ccp.fsm); /* fall through */ case DATALINK_AUTH: case DATALINK_LCP: fsm_Down(&dl->physical->link.lcp.fsm); if (stay) fsm_Close(&dl->physical->link.lcp.fsm); else fsm_Open(&dl->physical->link.ccp.fsm); /* fall through */ default: datalink_ComeDown(dl, stay); } } void datalink_StayDown(struct datalink *dl) { dl->reconnect_tries = 0; } int datalink_Show(struct cmdargs const *arg) { prompt_Printf(arg->prompt, "Name: %s\n", arg->cx->name); prompt_Printf(arg->prompt, " State: %s\n", datalink_State(arg->cx)); prompt_Printf(arg->prompt, " CHAP Encryption: %s\n", arg->cx->chap.using_MSChap ? "MSChap" : "MD5" ); prompt_Printf(arg->prompt, " Peer name: "); if (*arg->cx->peer.authname) prompt_Printf(arg->prompt, "%s\n", arg->cx->peer.authname); else if (arg->cx->state == DATALINK_OPEN) prompt_Printf(arg->prompt, "None requested\n"); else prompt_Printf(arg->prompt, "N/A\n"); prompt_Printf(arg->prompt, " Discriminator: %s\n", mp_Enddisc(arg->cx->peer.enddisc.class, arg->cx->peer.enddisc.address, arg->cx->peer.enddisc.len)); prompt_Printf(arg->prompt, "\nDefaults:\n"); prompt_Printf(arg->prompt, " Phone List: %s\n", arg->cx->cfg.phone.list); if (arg->cx->cfg.dial.max) prompt_Printf(arg->prompt, " Dial tries: %d, delay ", arg->cx->cfg.dial.max); else prompt_Printf(arg->prompt, " Dial tries: infinite, delay "); if (arg->cx->cfg.dial.next_timeout > 0) prompt_Printf(arg->prompt, "%ds/", arg->cx->cfg.dial.next_timeout); else prompt_Printf(arg->prompt, "random/"); if (arg->cx->cfg.dial.timeout > 0) prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.dial.timeout); else prompt_Printf(arg->prompt, "random\n"); prompt_Printf(arg->prompt, " Reconnect tries: %d, delay ", arg->cx->cfg.reconnect.max); if (arg->cx->cfg.reconnect.timeout > 0) prompt_Printf(arg->prompt, "%ds\n", arg->cx->cfg.reconnect.timeout); else prompt_Printf(arg->prompt, "random\n"); prompt_Printf(arg->prompt, " Dial Script: %s\n", arg->cx->cfg.script.dial); prompt_Printf(arg->prompt, " Login Script: %s\n", arg->cx->cfg.script.login); prompt_Printf(arg->prompt, " Hangup Script: %s\n", arg->cx->cfg.script.hangup); return 0; } int datalink_SetReconnect(struct cmdargs const *arg) { if (arg->argc == arg->argn+2) { arg->cx->cfg.reconnect.timeout = atoi(arg->argv[arg->argn]); arg->cx->cfg.reconnect.max = atoi(arg->argv[arg->argn+1]); return 0; } return -1; } int datalink_SetRedial(struct cmdargs const *arg) { int timeout; int tries; char *dot; if (arg->argc == arg->argn+1 || arg->argc == arg->argn+2) { if (strncasecmp(arg->argv[arg->argn], "random", 6) == 0 && (arg->argv[arg->argn][6] == '\0' || arg->argv[arg->argn][6] == '.')) { arg->cx->cfg.dial.timeout = -1; randinit(); } else { timeout = atoi(arg->argv[arg->argn]); if (timeout >= 0) arg->cx->cfg.dial.timeout = timeout; else { log_Printf(LogWARN, "Invalid redial timeout\n"); return -1; } } dot = strchr(arg->argv[arg->argn], '.'); if (dot) { if (strcasecmp(++dot, "random") == 0) { arg->cx->cfg.dial.next_timeout = -1; randinit(); } else { timeout = atoi(dot); if (timeout >= 0) arg->cx->cfg.dial.next_timeout = timeout; else { log_Printf(LogWARN, "Invalid next redial timeout\n"); return -1; } } } else /* Default next timeout */ arg->cx->cfg.dial.next_timeout = DIAL_NEXT_TIMEOUT; if (arg->argc == arg->argn+2) { tries = atoi(arg->argv[arg->argn+1]); if (tries >= 0) { arg->cx->cfg.dial.max = tries; } else { log_Printf(LogWARN, "Invalid retry value\n"); return 1; } } return 0; } return -1; } static const char *states[] = { "closed", "opening", "hangup", "dial", "login", "ready", "lcp", "auth", "open" }; const char * datalink_State(struct datalink *dl) { if (dl->state < 0 || dl->state >= sizeof states / sizeof states[0]) return "unknown"; return states[dl->state]; } static void datalink_NewState(struct datalink *dl, int state) { if (state != dl->state) { if (state >= 0 && state < sizeof states / sizeof states[0]) { log_Printf(LogPHASE, "%s: %s -> %s\n", dl->name, datalink_State(dl), states[state]); dl->state = state; } else log_Printf(LogERROR, "%s: Can't enter state %d !\n", dl->name, state); } } struct datalink * iov2datalink(struct bundle *bundle, struct iovec *iov, int *niov, int maxiov, int fd) { struct datalink *dl, *cdl; u_int retry; char *oname; dl = (struct datalink *)iov[(*niov)++].iov_base; dl->name = iov[*niov].iov_base; if (dl->name[DATALINK_MAXNAME-1]) { dl->name[DATALINK_MAXNAME-1] = '\0'; if (strlen(dl->name) == DATALINK_MAXNAME - 1) log_Printf(LogWARN, "Datalink name truncated to \"%s\"\n", dl->name); } /* Make sure the name is unique ! */ oname = NULL; do { for (cdl = bundle->links; cdl; cdl = cdl->next) if (!strcasecmp(dl->name, cdl->name)) { if (oname) free(datalink_NextName(dl)); else oname = datalink_NextName(dl); break; /* Keep renaming 'till we have no conflicts */ } } while (cdl); if (oname) { log_Printf(LogPHASE, "Rename link %s to %s\n", oname, dl->name); free(oname); } else { dl->name = strdup(dl->name); + dl->physical->link.name = dl->name; free(iov[*niov].iov_base); } (*niov)++; dl->desc.type = DATALINK_DESCRIPTOR; dl->desc.next = NULL; dl->desc.UpdateSet = datalink_UpdateSet; dl->desc.IsSet = datalink_IsSet; dl->desc.Read = datalink_Read; dl->desc.Write = datalink_Write; mp_linkInit(&dl->mp); *dl->phone.list = '\0'; dl->phone.next = NULL; dl->phone.alt = NULL; dl->phone.chosen = "N/A"; dl->bundle = bundle; dl->next = NULL; memset(&dl->dial_timer, '\0', sizeof dl->dial_timer); dl->dial_tries = 0; dl->reconnect_tries = 0; dl->parent = &bundle->fsm; dl->fsmp.LayerStart = datalink_LayerStart; dl->fsmp.LayerUp = datalink_LayerUp; dl->fsmp.LayerDown = datalink_LayerDown; dl->fsmp.LayerFinish = datalink_LayerFinish; dl->fsmp.object = dl; retry = dl->pap.cfg.fsmretry; auth_Init(&dl->pap); dl->pap.cfg.fsmretry = retry; retry = dl->chap.auth.cfg.fsmretry; auth_Init(&dl->chap.auth); dl->chap.auth.cfg.fsmretry = retry; dl->physical = iov2modem(dl, iov, niov, maxiov, fd); if (!dl->physical) { free(dl->name); free(dl); dl = NULL; } else { chat_Init(&dl->chat, dl->physical, NULL, 1, NULL); log_Printf(LogPHASE, "%s: Transferred in %s state\n", dl->name, datalink_State(dl)); } return dl; } int datalink2iov(struct datalink *dl, struct iovec *iov, int *niov, int maxiov) { /* If `dl' is NULL, we're allocating before a Fromiov() */ int link_fd; if (dl) { timer_Stop(&dl->dial_timer); timer_Stop(&dl->pap.authtimer); timer_Stop(&dl->chap.auth.authtimer); } if (*niov >= maxiov - 1) { log_Printf(LogERROR, "Toiov: No room for datalink !\n"); if (dl) { free(dl->name); free(dl); } return -1; } iov[*niov].iov_base = dl ? dl : malloc(sizeof *dl); iov[(*niov)++].iov_len = sizeof *dl; iov[*niov].iov_base = dl ? realloc(dl->name, DATALINK_MAXNAME) : malloc(DATALINK_MAXNAME); iov[(*niov)++].iov_len = DATALINK_MAXNAME; link_fd = modem2iov(dl ? dl->physical : NULL, iov, niov, maxiov); if (link_fd == -1 && dl) { free(dl->name); free(dl); } return link_fd; } char * datalink_NextName(struct datalink *dl) { int f, n; char *name, *oname; n = strlen(dl->name); name = (char *)malloc(n+3); for (f = n - 1; f >= 0; f--) if (!isdigit(dl->name[f])) break; n = sprintf(name, "%.*s-", dl->name[f] == '-' ? f : f + 1, dl->name); sprintf(name + n, "%d", atoi(dl->name + f + 1) + 1); oname = dl->name; dl->physical->link.name = dl->name = name; return oname; } diff --git a/usr.sbin/ppp/hdlc.c b/usr.sbin/ppp/hdlc.c index 9e3ac6054e21..3bc2a8f657cd 100644 --- a/usr.sbin/ppp/hdlc.c +++ b/usr.sbin/ppp/hdlc.c @@ -1,629 +1,628 @@ /* * PPP High Level Link Control (HDLC) Module * * Written by Toshiharu OHNO (tony-o@iij.ad.jp) * * Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd. * * Redistribution and use in source and binary forms are permitted * provided that the above copyright notice and this paragraph are * duplicated in all such forms and that any documentation, * advertising materials, and other materials related to such * distribution and use acknowledge that the software was developed * by the Internet Initiative Japan, Inc. The name of the * IIJ may not be used to endorse or promote products derived * from this software without specific prior written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. * - * $Id: hdlc.c,v 1.28.2.33 1998/05/04 03:00:07 brian Exp $ + * $Id: hdlc.c,v 1.28.2.34 1998/05/08 01:15:07 brian Exp $ * * TODO: */ #include #include #include #include #include #include #include #include #include "command.h" #include "mbuf.h" #include "log.h" #include "defs.h" #include "timer.h" #include "fsm.h" #include "lqr.h" #include "hdlc.h" #include "lcpproto.h" #include "iplist.h" #include "throughput.h" #include "slcompress.h" #include "ipcp.h" #include "ip.h" #include "vjcomp.h" #include "auth.h" #include "pap.h" #include "chap.h" #include "lcp.h" #include "async.h" #include "ccp.h" #include "link.h" #include "descriptor.h" #include "physical.h" #include "prompt.h" #include "chat.h" #include "mp.h" #include "datalink.h" #include "filter.h" #include "bundle.h" static u_short const fcstab[256] = { /* 00 */ 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, /* 08 */ 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, /* 10 */ 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, /* 18 */ 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, /* 20 */ 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, /* 28 */ 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, /* 30 */ 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, /* 38 */ 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, /* 40 */ 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, /* 48 */ 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, /* 50 */ 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, /* 58 */ 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, /* 60 */ 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, /* 68 */ 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, /* 70 */ 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, /* 78 */ 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, /* 80 */ 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, /* 88 */ 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, /* 90 */ 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, /* 98 */ 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, /* a0 */ 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, /* a8 */ 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, /* b0 */ 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, /* b8 */ 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, /* c0 */ 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, /* c8 */ 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, /* d0 */ 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, /* d8 */ 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, /* e0 */ 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, /* e8 */ 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, /* f0 */ 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, /* f8 */ 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 }; void hdlc_Init(struct hdlc *hdlc, struct lcp *lcp) { memset(hdlc, '\0', sizeof(struct hdlc)); hdlc->lqm.owner = lcp; } /* * HDLC FCS computation. Read RFC 1171 Appendix B and CCITT X.25 section * 2.27 for further details. */ inline u_short hdlc_Fcs(u_short fcs, u_char * cp, int len) { while (len--) fcs = (fcs >> 8) ^ fcstab[(fcs ^ *cp++) & 0xff]; return (fcs); } static inline u_short HdlcFcsBuf(u_short fcs, struct mbuf *m) { int len; u_char *pos, *end; len = mbuf_Length(m); pos = MBUF_CTOP(m); end = pos + m->cnt; while (len--) { fcs = (fcs >> 8) ^ fcstab[(fcs ^ *pos++) & 0xff]; if (pos == end && len) { m = m->next; pos = MBUF_CTOP(m); end = pos + m->cnt; } } return (fcs); } void hdlc_Output(struct link *l, int pri, u_short proto, struct mbuf *bp) { struct physical *p = link2physical(l); struct mbuf *mhp, *mfcs; u_char *cp; u_short fcs; if (!p || physical_IsSync(p)) mfcs = NULL; else mfcs = mbuf_Alloc(2, MB_HDLCOUT); mhp = mbuf_Alloc(4, MB_HDLCOUT); mhp->cnt = 0; cp = MBUF_CTOP(mhp); if (p && (proto == PROTO_LCP || l->lcp.his_acfcomp == 0)) { *cp++ = HDLC_ADDR; *cp++ = HDLC_UI; mhp->cnt += 2; } /* * If possible, compress protocol field. */ if (l->lcp.his_protocomp && (proto & 0xff00) == 0) { *cp++ = proto; mhp->cnt++; } else { *cp++ = proto >> 8; *cp = proto & 0377; mhp->cnt += 2; } mhp->next = bp; if (!p) { /* * This is where we multiplex the data over our available physical * links. We don't frame our logical link data. Instead we wait * for the logical link implementation to chop our data up and pile * it into the physical links by re-calling this function with the * encapsulated fragments. */ link_Output(l, pri, mhp); return; } /* Tack mfcs onto the end, then set bp back to the start of the data */ while (bp->next != NULL) bp = bp->next; bp->next = mfcs; bp = mhp->next; p->hdlc.lqm.OutOctets += mbuf_Length(mhp) + 1; p->hdlc.lqm.OutPackets++; if (proto == PROTO_LQR) { /* Overwrite the entire packet */ struct lqrdata lqr; lqr.MagicNumber = p->link.lcp.want_magic; lqr.LastOutLQRs = p->hdlc.lqm.lqr.peer.PeerOutLQRs; lqr.LastOutPackets = p->hdlc.lqm.lqr.peer.PeerOutPackets; lqr.LastOutOctets = p->hdlc.lqm.lqr.peer.PeerOutOctets; lqr.PeerInLQRs = p->hdlc.lqm.lqr.SaveInLQRs; lqr.PeerInPackets = p->hdlc.lqm.SaveInPackets; lqr.PeerInDiscards = p->hdlc.lqm.SaveInDiscards; lqr.PeerInErrors = p->hdlc.lqm.SaveInErrors; lqr.PeerInOctets = p->hdlc.lqm.SaveInOctets; lqr.PeerOutPackets = p->hdlc.lqm.OutPackets; lqr.PeerOutOctets = p->hdlc.lqm.OutOctets; if (p->hdlc.lqm.lqr.peer.LastOutLQRs == p->hdlc.lqm.lqr.OutLQRs) { /* * only increment if it's the first time or we've got a reply * from the last one */ lqr.PeerOutLQRs = ++p->hdlc.lqm.lqr.OutLQRs; lqr_Dump(l->name, "Output", &lqr); } else { lqr.PeerOutLQRs = p->hdlc.lqm.lqr.OutLQRs; lqr_Dump(l->name, "Output (again)", &lqr); } lqr_ChangeOrder(&lqr, (struct lqrdata *)MBUF_CTOP(bp)); } if (mfcs) { mfcs->cnt = 0; fcs = HdlcFcsBuf(INITFCS, mhp); fcs = ~fcs; cp = MBUF_CTOP(mfcs); *cp++ = fcs & 0377; /* Low byte first!! */ *cp++ = fcs >> 8; mfcs->cnt = 2; } log_DumpBp(LogHDLC, "hdlc_Output", mhp); link_ProtocolRecord(l, proto, PROTO_OUT); log_Printf(LogDEBUG, "hdlc_Output: proto = 0x%04x\n", proto); if (physical_IsSync(p)) link_Output(l, pri, mhp); /* Send it raw */ else async_Output(pri, mhp, proto, p); } /* Check out the latest ``Assigned numbers'' rfc (rfc1700.txt) */ static struct { u_short from; u_short to; const char *name; } protocols[] = { { 0x0001, 0x0001, "Padding Protocol" }, { 0x0003, 0x001f, "reserved (transparency inefficient)" }, { 0x0021, 0x0021, "Internet Protocol" }, { 0x0023, 0x0023, "OSI Network Layer" }, { 0x0025, 0x0025, "Xerox NS IDP" }, { 0x0027, 0x0027, "DECnet Phase IV" }, { 0x0029, 0x0029, "Appletalk" }, { 0x002b, 0x002b, "Novell IPX" }, { 0x002d, 0x002d, "Van Jacobson Compressed TCP/IP" }, { 0x002f, 0x002f, "Van Jacobson Uncompressed TCP/IP" }, { 0x0031, 0x0031, "Bridging PDU" }, { 0x0033, 0x0033, "Stream Protocol (ST-II)" }, { 0x0035, 0x0035, "Banyan Vines" }, { 0x0037, 0x0037, "reserved (until 1993)" }, { 0x0039, 0x0039, "AppleTalk EDDP" }, { 0x003b, 0x003b, "AppleTalk SmartBuffered" }, { 0x003d, 0x003d, "Multi-Link" }, { 0x003f, 0x003f, "NETBIOS Framing" }, { 0x0041, 0x0041, "Cisco Systems" }, { 0x0043, 0x0043, "Ascom Timeplex" }, { 0x0045, 0x0045, "Fujitsu Link Backup and Load Balancing (LBLB)" }, { 0x0047, 0x0047, "DCA Remote Lan" }, { 0x0049, 0x0049, "Serial Data Transport Protocol (PPP-SDTP)" }, { 0x004b, 0x004b, "SNA over 802.2" }, { 0x004d, 0x004d, "SNA" }, { 0x004f, 0x004f, "IP6 Header Compression" }, { 0x0051, 0x0051, "KNX Bridging Data" }, { 0x0053, 0x0053, "Encryption" }, { 0x0055, 0x0055, "Individual Link Encryption" }, { 0x006f, 0x006f, "Stampede Bridging" }, { 0x0071, 0x0071, "BAP Bandwidth Allocation Protocol" }, { 0x0073, 0x0073, "MP+ Protocol" }, { 0x007d, 0x007d, "reserved (Control Escape)" }, { 0x007f, 0x007f, "reserved (compression inefficient)" }, { 0x00cf, 0x00cf, "reserved (PPP NLPID)" }, { 0x00fb, 0x00fb, "compression on single link in multilink group" }, { 0x00fd, 0x00fd, "1st choice compression" }, { 0x00ff, 0x00ff, "reserved (compression inefficient)" }, { 0x0200, 0x02ff, "(compression inefficient)" }, { 0x0201, 0x0201, "802.1d Hello Packets" }, { 0x0203, 0x0203, "IBM Source Routing BPDU" }, { 0x0205, 0x0205, "DEC LANBridge100 Spanning Tree" }, { 0x0207, 0x0207, "Cisco Discovery Protocol" }, { 0x0209, 0x0209, "Netcs Twin Routing" }, { 0x0231, 0x0231, "Luxcom" }, { 0x0233, 0x0233, "Sigma Network Systems" }, { 0x0235, 0x0235, "Apple Client Server Protocol" }, { 0x1e00, 0x1eff, "(compression inefficient)" }, { 0x4001, 0x4001, "Cray Communications Control Protocol" }, { 0x4003, 0x4003, "CDPD Mobile Network Registration Protocol" }, { 0x4021, 0x4021, "Stacker LZS" }, { 0x8001, 0x801f, "Not Used - reserved" }, { 0x8021, 0x8021, "Internet Protocol Control Protocol" }, { 0x8023, 0x8023, "OSI Network Layer Control Protocol" }, { 0x8025, 0x8025, "Xerox NS IDP Control Protocol" }, { 0x8027, 0x8027, "DECnet Phase IV Control Protocol" }, { 0x8029, 0x8029, "Appletalk Control Protocol" }, { 0x802b, 0x802b, "Novell IPX Control Protocol" }, { 0x802d, 0x802d, "reserved" }, { 0x802f, 0x802f, "reserved" }, { 0x8031, 0x8031, "Bridging NCP" }, { 0x8033, 0x8033, "Stream Protocol Control Protocol" }, { 0x8035, 0x8035, "Banyan Vines Control Protocol" }, { 0x8037, 0x8037, "reserved till 1993" }, { 0x8039, 0x8039, "reserved" }, { 0x803b, 0x803b, "reserved" }, { 0x803d, 0x803d, "Multi-Link Control Protocol" }, { 0x803f, 0x803f, "NETBIOS Framing Control Protocol" }, { 0x8041, 0x8041, "Cisco Systems Control Protocol" }, { 0x8043, 0x8043, "Ascom Timeplex" }, { 0x8045, 0x8045, "Fujitsu LBLB Control Protocol" }, { 0x8047, 0x8047, "DCA Remote Lan Network Control Protocol (RLNCP)" }, { 0x8049, 0x8049, "Serial Data Control Protocol (PPP-SDCP)" }, { 0x804b, 0x804b, "SNA over 802.2 Control Protocol" }, { 0x804d, 0x804d, "SNA Control Protocol" }, { 0x804f, 0x804f, "IP6 Header Compression Control Protocol" }, { 0x8051, 0x8051, "KNX Bridging Control Protocol" }, { 0x8053, 0x8053, "Encryption Control Protocol" }, { 0x8055, 0x8055, "Individual Link Encryption Control Protocol" }, { 0x806f, 0x806f, "Stampede Bridging Control Protocol" }, { 0x8073, 0x8073, "MP+ Control Protocol" }, { 0x8071, 0x8071, "BACP Bandwidth Allocation Control Protocol" }, { 0x807d, 0x807d, "Not Used - reserved" }, { 0x80cf, 0x80cf, "Not Used - reserved" }, { 0x80fb, 0x80fb, "compression on single link in multilink group control" }, { 0x80fd, 0x80fd, "Compression Control Protocol" }, { 0x80ff, 0x80ff, "Not Used - reserved" }, { 0x8207, 0x8207, "Cisco Discovery Protocol Control" }, { 0x8209, 0x8209, "Netcs Twin Routing" }, { 0x8235, 0x8235, "Apple Client Server Protocol Control" }, { 0xc021, 0xc021, "Link Control Protocol" }, { 0xc023, 0xc023, "Password Authentication Protocol" }, { 0xc025, 0xc025, "Link Quality Report" }, { 0xc027, 0xc027, "Shiva Password Authentication Protocol" }, { 0xc029, 0xc029, "CallBack Control Protocol (CBCP)" }, { 0xc081, 0xc081, "Container Control Protocol" }, { 0xc223, 0xc223, "Challenge Handshake Authentication Protocol" }, { 0xc225, 0xc225, "RSA Authentication Protocol" }, { 0xc227, 0xc227, "Extensible Authentication Protocol" }, { 0xc26f, 0xc26f, "Stampede Bridging Authorization Protocol" }, { 0xc281, 0xc281, "Proprietary Authentication Protocol" }, { 0xc283, 0xc283, "Proprietary Authentication Protocol" }, { 0xc481, 0xc481, "Proprietary Node ID Authentication Protocol" } }; #define NPROTOCOLS (sizeof protocols/sizeof protocols[0]) const char * hdlc_Protocol2Nam(u_short proto) { int f; for (f = 0; f < NPROTOCOLS; f++) if (proto >= protocols[f].from && proto <= protocols[f].to) return protocols[f].name; else if (proto < protocols[f].from) break; return "unrecognised protocol"; } void hdlc_DecodePacket(struct bundle *bundle, u_short proto, struct mbuf * bp, struct link *l) { struct physical *p = link2physical(l); u_char *cp; log_Printf(LogDEBUG, "DecodePacket: proto = 0x%04x\n", proto); /* decompress everything. CCP needs uncompressed data too */ if ((bp = ccp_Decompress(&l->ccp, &proto, bp)) == NULL) return; switch (proto) { case PROTO_LCP: lcp_Input(&l->lcp, bp); break; case PROTO_PAP: if (p) pap_Input(bundle, bp, p); else { log_Printf(LogERROR, "DecodePacket: PAP: Not a physical link !\n"); mbuf_Free(bp); } break; case PROTO_LQR: if (p) { p->hdlc.lqm.lqr.SaveInLQRs++; lqr_Input(p, bp); } else { log_Printf(LogERROR, "DecodePacket: LQR: Not a physical link !\n"); mbuf_Free(bp); } break; case PROTO_CHAP: if (p) chap_Input(bundle, bp, p); else { log_Printf(LogERROR, "DecodePacket: CHAP: Not a physical link !\n"); mbuf_Free(bp); } break; case PROTO_VJUNCOMP: case PROTO_VJCOMP: bp = vj_Input(&bundle->ncp.ipcp, bp, proto); if (bp == NULL) break; /* fall down */ case PROTO_IP: ip_Input(bundle, bp); break; case PROTO_IPCP: ipcp_Input(&bundle->ncp.ipcp, bp); break; case PROTO_CCP: ccp_Input(&l->ccp, bundle, bp); break; case PROTO_MP: if (bundle->ncp.mp.active) { if (p) mp_Input(&bundle->ncp.mp, bp, p); else { log_Printf(LogERROR, "DecodePacket: MP inside MP ?!\n"); mbuf_Free(bp); } break; } /* Fall through */ default: log_Printf(LogPHASE, "%s protocol 0x%04x (%s)\n", proto == PROTO_MP ? "Unexpected" : "Unknown", proto, hdlc_Protocol2Nam(proto)); bp->offset -= 2; bp->cnt += 2; cp = MBUF_CTOP(bp); lcp_SendProtoRej(&l->lcp, cp, bp->cnt); if (p) { p->hdlc.lqm.SaveInDiscards++; p->hdlc.stats.unknownproto++; } mbuf_Free(bp); break; } } void hdlc_Input(struct bundle *bundle, struct mbuf * bp, struct physical *physical) { u_short fcs, proto; u_char *cp, addr, ctrl; log_DumpBp(LogHDLC, "hdlc_Input:", bp); if (physical_IsSync(physical)) fcs = GOODFCS; else fcs = hdlc_Fcs(INITFCS, MBUF_CTOP(bp), bp->cnt); physical->hdlc.lqm.SaveInOctets += bp->cnt + 1; - log_Printf(LogDEBUG, "hdlc_Input: fcs = %04x (%s)\n", - fcs, (fcs == GOODFCS) ? "good" : "bad"); + log_Printf(LogDEBUG, "%s: hdlc_Input: fcs = %04x (%s)\n", + physical->link.name, fcs, (fcs == GOODFCS) ? "good" : "BAD!"); if (fcs != GOODFCS) { physical->hdlc.lqm.SaveInErrors++; - log_Printf(LogDEBUG, "hdlc_Input: Bad FCS\n"); physical->hdlc.stats.badfcs++; mbuf_Free(bp); return; } if (!physical_IsSync(physical)) bp->cnt -= 2; /* discard FCS part */ if (bp->cnt < 2) { /* XXX: raise this bar ? */ mbuf_Free(bp); return; } cp = MBUF_CTOP(bp); if (!physical->link.lcp.want_acfcomp) { /* * We expect that packet is not compressed. */ addr = *cp++; if (addr != HDLC_ADDR) { physical->hdlc.lqm.SaveInErrors++; physical->hdlc.stats.badaddr++; log_Printf(LogDEBUG, "hdlc_Input: addr %02x\n", *cp); mbuf_Free(bp); return; } ctrl = *cp++; if (ctrl != HDLC_UI) { physical->hdlc.lqm.SaveInErrors++; physical->hdlc.stats.badcommand++; log_Printf(LogDEBUG, "hdlc_Input: %02x\n", *cp); mbuf_Free(bp); return; } bp->offset += 2; bp->cnt -= 2; } else if (cp[0] == HDLC_ADDR && cp[1] == HDLC_UI) { /* * We can receive compressed packet, but peer still send uncompressed * packet to me. */ cp += 2; bp->offset += 2; bp->cnt -= 2; } if (physical->link.lcp.want_protocomp) { proto = 0; cp--; do { cp++; bp->offset++; bp->cnt--; proto = proto << 8; proto += *cp; } while (!(proto & 1)); } else { proto = *cp++ << 8; proto |= *cp++; bp->offset += 2; bp->cnt -= 2; } link_ProtocolRecord(&physical->link, proto, PROTO_IN); physical->hdlc.lqm.SaveInPackets++; hdlc_DecodePacket(bundle, proto, bp, &physical->link); } /* * Detect a HDLC frame */ static const char *FrameHeaders[] = { "\176\377\003\300\041", "\176\377\175\043\300\041", "\176\177\175\043\100\041", "\176\175\337\175\043\300\041", "\176\175\137\175\043\100\041", NULL, }; u_char * hdlc_Detect(struct physical *physical, u_char *cp, int n) { const char *fp, **hp; char *ptr; cp[n] = '\0'; /* be sure to null terminate */ ptr = NULL; for (hp = FrameHeaders; *hp; hp++) { fp = *hp; if (physical_IsSync(physical)) fp++; ptr = strstr((char *)cp, fp); /* XXX: cp may have embedded NULs */ if (ptr) break; } return (u_char *)ptr; } int hdlc_ReportStatus(struct cmdargs const *arg) { struct hdlc *hdlc = &arg->cx->physical->hdlc; prompt_Printf(arg->prompt, "%s HDLC level errors:\n", arg->cx->name); prompt_Printf(arg->prompt, " Bad Frame Check Sequence fields: %u\n", hdlc->stats.badfcs); prompt_Printf(arg->prompt, " Bad address (!= 0x%02x) fields: %u\n", HDLC_ADDR, hdlc->stats.badaddr); prompt_Printf(arg->prompt, " Bad command (!= 0x%02x) fields: %u\n", HDLC_UI, hdlc->stats.badcommand); prompt_Printf(arg->prompt, " Unrecognised protocol fields: %u\n", hdlc->stats.unknownproto); return 0; } static void hdlc_ReportTime(void *v) { /* Moan about HDLC errors */ struct hdlc *hdlc = (struct hdlc *)v; timer_Stop(&hdlc->ReportTimer); if (memcmp(&hdlc->laststats, &hdlc->stats, sizeof hdlc->stats)) { log_Printf(LogPHASE, "%s: HDLC errors -> FCS: %u, ADDR: %u, COMD: %u, PROTO: %u\n", hdlc->lqm.owner->fsm.link->name, hdlc->stats.badfcs - hdlc->laststats.badfcs, hdlc->stats.badaddr - hdlc->laststats.badaddr, hdlc->stats.badcommand - hdlc->laststats.badcommand, hdlc->stats.unknownproto - hdlc->laststats.unknownproto); hdlc->laststats = hdlc->stats; } timer_Start(&hdlc->ReportTimer); } void hdlc_StartTimer(struct hdlc *hdlc) { timer_Stop(&hdlc->ReportTimer); hdlc->ReportTimer.load = 60 * SECTICKS; hdlc->ReportTimer.arg = hdlc; hdlc->ReportTimer.func = hdlc_ReportTime; hdlc->ReportTimer.name = "hdlc"; timer_Start(&hdlc->ReportTimer); } void hdlc_StopTimer(struct hdlc *hdlc) { timer_Stop(&hdlc->ReportTimer); }