MFMP: Make ppp multilink capable.

      See the file README.changes, and re-read the man page.

1 files changed, 1096 insertions, 0 deletions

diff --git a/usr.sbin/ppp/datalink.c b/usr.sbin/ppp/datalink.c
new file mode 100644
index 0000000..0965f0a
--- /dev/null
+++ b/usr.sbin/ppp/datalink.c
@@ -0,0 +1,1096 @@
+/*-
+ * 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.
+ *
+ *	$Id: datalink.c,v 1.1.2.63 1998/05/16 23:47:24 brian Exp $
+ */
+
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <sys/un.h>
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/uio.h>
+#include <termios.h>
+#include <unistd.h>
+
+#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:
+      result = descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
+      break;
+  }
+  return result;
+}
+
+int
+datalink_RemoveFromSet(struct datalink *dl, fd_set *r, fd_set *w, fd_set *e)
+{
+  return physical_RemoveFromSet(dl->physical, r, w, e);
+}
+
+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 (well, we will soon) ! */
+        return;
+      case MP_UP:
+        /* First link in the bundle */
+        auth_Select(dl->bundle, dl->peer.authname, dl->physical);
+        /* fall through */
+      case MP_ADDED:
+        /* We're in multilink mode ! */
+        dl->physical->link.ccp.fsm.open_mode = OPEN_PASSIVE;
+        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);
+  } else if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
+    fsm_Open(fp);		/* CCP goes to ST_STOPPED */
+}
+
+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;
+}
+
+void
+datalink_Rename(struct datalink *dl, const char *name)
+{
+  free(dl->name);
+  dl->physical->link.name = dl->name = strdup(name);
+}
+
+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;
+}
+
+int
+datalink_SetMode(struct datalink *dl, int mode)
+{
+  if (!physical_SetMode(dl->physical, mode))
+    return 0;
+  if (dl->physical->type & (PHYS_DIRECT|PHYS_DEDICATED))
+    dl->script.run = 0;
+  if (dl->physical->type == PHYS_DIRECT)
+    dl->reconnect_tries = 0;
+  if (mode & (PHYS_PERM|PHYS_1OFF) && dl->state <= DATALINK_READY)
+    datalink_Up(dl, 1, 1);
+  return 1;
+}