zpu: renamed the directory for the usrp2 fw to zpu to reflect the cpu type

1 files changed, 988 insertions, 0 deletions

diff --git a/firmware/zpu/lwip/lwip-1.3.1/src/netif/ppp/auth.c b/firmware/zpu/lwip/lwip-1.3.1/src/netif/ppp/auth.c
new file mode 100644
index 000000000..4c0ee6a8e
--- /dev/null
+++ b/firmware/zpu/lwip/lwip-1.3.1/src/netif/ppp/auth.c
@@ -0,0 +1,988 @@
+/*****************************************************************************
+* auth.c - Network Authentication and Phase Control program file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* Copyright (c) 1997 by Global Election Systems Inc.  All rights reserved.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE 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 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.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
+*   Ported from public pppd code.
+*****************************************************************************/
+/*
+ * auth.c - PPP authentication and phase control.
+ *
+ * Copyright (c) 1993 The Australian National University.
+ * All rights reserved.
+ *
+ * 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 Australian National University.  The name of the University
+ * 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.
+ *
+ * Copyright (c) 1989 Carnegie Mellon University.
+ * All rights reserved.
+ *
+ * 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 Carnegie Mellon University.  The name of the
+ * University 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.
+ */
+
+#include "lwip/opt.h"
+
+#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
+
+#include "ppp.h"
+#include "pppdebug.h"
+
+#include "fsm.h"
+#include "lcp.h"
+#include "pap.h"
+#include "chap.h"
+#include "auth.h"
+#include "ipcp.h"
+
+#if CBCP_SUPPORT
+#include "cbcp.h"
+#endif /* CBCP_SUPPORT */
+
+/*************************/
+/*** LOCAL DEFINITIONS ***/
+/*************************/
+
+/* Bits in auth_pending[] */
+#define PAP_WITHPEER    1
+#define PAP_PEER        2
+#define CHAP_WITHPEER   4
+#define CHAP_PEER       8
+
+
+/************************/
+/*** LOCAL DATA TYPES ***/
+/************************/
+/* Used for storing a sequence of words.  Usually malloced. */
+struct wordlist {
+  struct wordlist *next;
+  char        word[1];
+};
+
+
+/***********************************/
+/*** LOCAL FUNCTION DECLARATIONS ***/
+/***********************************/
+extern char *crypt (const char *, const char *);
+
+/* Prototypes for procedures local to this file. */
+
+static void network_phase (int);
+static void check_idle (void *);
+static void connect_time_expired (void *);
+#if 0
+static int  login (char *, char *, char **, int *);
+#endif
+static void logout (void);
+static int  null_login (int);
+static int  get_pap_passwd (int, char *, char *);
+static int  have_pap_secret (void);
+static int  have_chap_secret (char *, char *, u32_t);
+static int  ip_addr_check (u32_t, struct wordlist *);
+#if 0 /* PAP_SUPPORT || CHAP_SUPPORT */
+static void set_allowed_addrs(int unit, struct wordlist *addrs);
+static void free_wordlist (struct wordlist *);
+#endif /* 0 */ /* PAP_SUPPORT || CHAP_SUPPORT */
+#if CBCP_SUPPORT
+static void callback_phase (int);
+#endif /* CBCP_SUPPORT */
+
+
+/******************************/
+/*** PUBLIC DATA STRUCTURES ***/
+/******************************/
+
+
+/*****************************/
+/*** LOCAL DATA STRUCTURES ***/
+/*****************************/
+#if PAP_SUPPORT || CHAP_SUPPORT
+/* The name by which the peer authenticated itself to us. */
+static char peer_authname[MAXNAMELEN];
+#endif /* PAP_SUPPORT || CHAP_SUPPORT */
+
+/* Records which authentication operations haven't completed yet. */
+static int auth_pending[NUM_PPP];
+
+/* Set if we have successfully called login() */
+static int logged_in;
+
+/* Set if we have run the /etc/ppp/auth-up script. */
+static int did_authup;
+
+/* List of addresses which the peer may use. */
+static struct wordlist *addresses[NUM_PPP];
+
+/* Number of network protocols which we have opened. */
+static int num_np_open;
+
+/* Number of network protocols which have come up. */
+static int num_np_up;
+
+#if PAP_SUPPORT || CHAP_SUPPORT
+/* Set if we got the contents of passwd[] from the pap-secrets file. */
+static int passwd_from_file;
+#endif /* PAP_SUPPORT || CHAP_SUPPORT */
+
+
+/***********************************/
+/*** PUBLIC FUNCTION DEFINITIONS ***/
+/***********************************/
+/*
+ * An Open on LCP has requested a change from Dead to Establish phase.
+ * Do what's necessary to bring the physical layer up.
+ */
+void
+link_required(int unit)
+{
+  LWIP_UNUSED_ARG(unit);
+
+  AUTHDEBUG((LOG_INFO, "link_required: %d\n", unit));
+}
+
+/*
+ * LCP has terminated the link; go to the Dead phase and take the
+ * physical layer down.
+ */
+void
+link_terminated(int unit)
+{
+  AUTHDEBUG((LOG_INFO, "link_terminated: %d\n", unit));
+  if (lcp_phase[unit] == PHASE_DEAD) {
+    return;
+  }
+  if (logged_in) {
+    logout();
+  }
+  lcp_phase[unit] = PHASE_DEAD;
+  AUTHDEBUG((LOG_NOTICE, "Connection terminated.\n"));
+  pppLinkTerminated(unit);
+}
+
+/*
+ * LCP has gone down; it will either die or try to re-establish.
+ */
+void
+link_down(int unit)
+{
+  int i;
+  struct protent *protp;
+  
+  AUTHDEBUG((LOG_INFO, "link_down: %d\n", unit));
+  if (did_authup) {
+    /* XXX Do link down processing. */
+    did_authup = 0;
+  }
+  for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
+    if (!protp->enabled_flag) {
+      continue;
+    }
+    if (protp->protocol != PPP_LCP && protp->lowerdown != NULL) {
+      (*protp->lowerdown)(unit);
+    }
+    if (protp->protocol < 0xC000 && protp->close != NULL) {
+      (*protp->close)(unit, "LCP down");
+    }
+  }
+  num_np_open = 0;
+  num_np_up = 0;
+  if (lcp_phase[unit] != PHASE_DEAD) {
+    lcp_phase[unit] = PHASE_TERMINATE;
+  }
+  pppLinkDown(unit);
+}
+
+/*
+ * The link is established.
+ * Proceed to the Dead, Authenticate or Network phase as appropriate.
+ */
+void
+link_established(int unit)
+{
+  int auth;
+  int i;
+  struct protent *protp;
+  lcp_options *wo = &lcp_wantoptions[unit];
+  lcp_options *go = &lcp_gotoptions[unit];
+#if PAP_SUPPORT || CHAP_SUPPORT
+  lcp_options *ho = &lcp_hisoptions[unit];
+#endif /* PAP_SUPPORT || CHAP_SUPPORT */
+
+  AUTHDEBUG((LOG_INFO, "link_established: %d\n", unit));
+  /*
+   * Tell higher-level protocols that LCP is up.
+   */
+  for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
+    if (protp->protocol != PPP_LCP && protp->enabled_flag && protp->lowerup != NULL) {
+      (*protp->lowerup)(unit);
+    }
+  }
+  if (ppp_settings.auth_required && !(go->neg_chap || go->neg_upap)) {
+    /*
+     * We wanted the peer to authenticate itself, and it refused:
+     * treat it as though it authenticated with PAP using a username
+     * of "" and a password of "".  If that's not OK, boot it out.
+     */
+    if (!wo->neg_upap || !null_login(unit)) {
+      AUTHDEBUG((LOG_WARNING, "peer refused to authenticate\n"));
+      lcp_close(unit, "peer refused to authenticate");
+      return;
+    }
+  }
+    
+  lcp_phase[unit] = PHASE_AUTHENTICATE;
+  auth = 0;
+#if CHAP_SUPPORT
+  if (go->neg_chap) {
+    ChapAuthPeer(unit, ppp_settings.our_name, go->chap_mdtype);
+    auth |= CHAP_PEER;
+  } 
+#endif /* CHAP_SUPPORT */
+#if PAP_SUPPORT && CHAP_SUPPORT
+  else
+#endif /* PAP_SUPPORT && CHAP_SUPPORT */
+#if PAP_SUPPORT
+  if (go->neg_upap) {
+    upap_authpeer(unit);
+    auth |= PAP_PEER;
+  }
+#endif /* PAP_SUPPORT */
+#if CHAP_SUPPORT
+  if (ho->neg_chap) {
+    ChapAuthWithPeer(unit, ppp_settings.user, ho->chap_mdtype);
+    auth |= CHAP_WITHPEER;
+  }
+#endif /* CHAP_SUPPORT */
+#if PAP_SUPPORT && CHAP_SUPPORT
+  else
+#endif /* PAP_SUPPORT && CHAP_SUPPORT */
+#if PAP_SUPPORT
+  if (ho->neg_upap) {
+    if (ppp_settings.passwd[0] == 0) {
+      passwd_from_file = 1;
+      if (!get_pap_passwd(unit, ppp_settings.user, ppp_settings.passwd)) {
+        AUTHDEBUG((LOG_ERR, "No secret found for PAP login\n"));
+      }
+    }
+    upap_authwithpeer(unit, ppp_settings.user, ppp_settings.passwd);
+    auth |= PAP_WITHPEER;
+  }
+#endif /* PAP_SUPPORT */
+  auth_pending[unit] = auth;
+
+  if (!auth) {
+    network_phase(unit);
+  }
+}
+
+/*
+ * The peer has failed to authenticate himself using `protocol'.
+ */
+void
+auth_peer_fail(int unit, u16_t protocol)
+{
+  LWIP_UNUSED_ARG(protocol);
+
+  AUTHDEBUG((LOG_INFO, "auth_peer_fail: %d proto=%X\n", unit, protocol));
+  /*
+   * Authentication failure: take the link down
+   */
+  lcp_close(unit, "Authentication failed");
+}
+
+
+#if PAP_SUPPORT || CHAP_SUPPORT
+/*
+ * The peer has been successfully authenticated using `protocol'.
+ */
+void
+auth_peer_success(int unit, u16_t protocol, char *name, int namelen)
+{
+  int pbit;
+  
+  AUTHDEBUG((LOG_INFO, "auth_peer_success: %d proto=%X\n", unit, protocol));
+  switch (protocol) {
+    case PPP_CHAP:
+      pbit = CHAP_PEER;
+      break;
+    case PPP_PAP:
+      pbit = PAP_PEER;
+      break;
+    default:
+      AUTHDEBUG((LOG_WARNING, "auth_peer_success: unknown protocol %x\n", protocol));
+      return;
+  }
+  
+  /*
+   * Save the authenticated name of the peer for later.
+   */
+  if (namelen > sizeof(peer_authname) - 1) {
+    namelen = sizeof(peer_authname) - 1;
+  }
+  BCOPY(name, peer_authname, namelen);
+  peer_authname[namelen] = 0;
+  
+  /*
+   * If there is no more authentication still to be done,
+   * proceed to the network (or callback) phase.
+   */
+  if ((auth_pending[unit] &= ~pbit) == 0) {
+    network_phase(unit);
+  }
+}
+
+/*
+ * We have failed to authenticate ourselves to the peer using `protocol'.
+ */
+void
+auth_withpeer_fail(int unit, u16_t protocol)
+{
+  int errCode = PPPERR_AUTHFAIL;
+  
+  LWIP_UNUSED_ARG(protocol);
+
+  AUTHDEBUG((LOG_INFO, "auth_withpeer_fail: %d proto=%X\n", unit, protocol));
+  if (passwd_from_file) {
+    BZERO(ppp_settings.passwd, MAXSECRETLEN);
+  }
+  /* 
+   * XXX Warning: the unit number indicates the interface which is
+   * not necessarily the PPP connection.  It works here as long
+   * as we are only supporting PPP interfaces.
+   */
+  pppIOCtl(unit, PPPCTLS_ERRCODE, &errCode);
+
+  /*
+   * We've failed to authenticate ourselves to our peer.
+   * He'll probably take the link down, and there's not much
+   * we can do except wait for that.
+   */
+}
+
+/*
+ * We have successfully authenticated ourselves with the peer using `protocol'.
+ */
+void
+auth_withpeer_success(int unit, u16_t protocol)
+{
+  int pbit;
+  
+  AUTHDEBUG((LOG_INFO, "auth_withpeer_success: %d proto=%X\n", unit, protocol));
+  switch (protocol) {
+    case PPP_CHAP:
+      pbit = CHAP_WITHPEER;
+      break;
+    case PPP_PAP:
+      if (passwd_from_file) {
+        BZERO(ppp_settings.passwd, MAXSECRETLEN);
+      }
+      pbit = PAP_WITHPEER;
+      break;
+    default:
+      AUTHDEBUG((LOG_WARNING, "auth_peer_success: unknown protocol %x\n", protocol));
+      pbit = 0;
+  }
+  
+  /*
+   * If there is no more authentication still being done,
+   * proceed to the network (or callback) phase.
+   */
+  if ((auth_pending[unit] &= ~pbit) == 0) {
+    network_phase(unit);
+  }
+}
+#endif /* PAP_SUPPORT || CHAP_SUPPORT */
+
+
+/*
+ * np_up - a network protocol has come up.
+ */
+void
+np_up(int unit, u16_t proto)
+{
+  LWIP_UNUSED_ARG(unit);
+  LWIP_UNUSED_ARG(proto);
+
+  AUTHDEBUG((LOG_INFO, "np_up: %d proto=%X\n", unit, proto));
+  if (num_np_up == 0) {
+    AUTHDEBUG((LOG_INFO, "np_up: maxconnect=%d idle_time_limit=%d\n",ppp_settings.maxconnect,ppp_settings.idle_time_limit));
+    /*
+     * At this point we consider that the link has come up successfully.
+     */
+    if (ppp_settings.idle_time_limit > 0) {
+      TIMEOUT(check_idle, NULL, ppp_settings.idle_time_limit);
+    }
+    
+    /*
+     * Set a timeout to close the connection once the maximum
+     * connect time has expired.
+     */
+    if (ppp_settings.maxconnect > 0) {
+      TIMEOUT(connect_time_expired, 0, ppp_settings.maxconnect);
+    }
+  }
+  ++num_np_up;
+}
+
+/*
+ * np_down - a network protocol has gone down.
+ */
+void
+np_down(int unit, u16_t proto)
+{
+  LWIP_UNUSED_ARG(unit);
+  LWIP_UNUSED_ARG(proto);
+
+  AUTHDEBUG((LOG_INFO, "np_down: %d proto=%X\n", unit, proto));
+  if (--num_np_up == 0 && ppp_settings.idle_time_limit > 0) {
+    UNTIMEOUT(check_idle, NULL);
+  }
+}
+
+/*
+ * np_finished - a network protocol has finished using the link.
+ */
+void
+np_finished(int unit, u16_t proto)
+{
+  LWIP_UNUSED_ARG(unit);
+  LWIP_UNUSED_ARG(proto);
+
+  AUTHDEBUG((LOG_INFO, "np_finished: %d proto=%X\n", unit, proto));
+  if (--num_np_open <= 0) {
+    /* no further use for the link: shut up shop. */
+    lcp_close(0, "No network protocols running");
+  }
+}
+
+/*
+ * auth_reset - called when LCP is starting negotiations to recheck
+ * authentication options, i.e. whether we have appropriate secrets
+ * to use for authenticating ourselves and/or the peer.
+ */
+void
+auth_reset(int unit)
+{
+  lcp_options *go = &lcp_gotoptions[unit];
+  lcp_options *ao = &lcp_allowoptions[0];
+  ipcp_options *ipwo = &ipcp_wantoptions[0];
+  u32_t remote;
+
+  AUTHDEBUG((LOG_INFO, "auth_reset: %d\n", unit));
+  ao->neg_upap = !ppp_settings.refuse_pap && (ppp_settings.passwd[0] != 0 || get_pap_passwd(unit, NULL, NULL));
+  ao->neg_chap = !ppp_settings.refuse_chap && ppp_settings.passwd[0] != 0 /*have_chap_secret(ppp_settings.user, ppp_settings.remote_name, (u32_t)0)*/;
+
+  if (go->neg_upap && !have_pap_secret()) {
+    go->neg_upap = 0;
+  }
+  if (go->neg_chap) {
+    remote = ipwo->accept_remote? 0: ipwo->hisaddr;
+    if (!have_chap_secret(ppp_settings.remote_name, ppp_settings.our_name, remote)) {
+      go->neg_chap = 0;
+    }
+  }
+}
+
+#if PAP_SUPPORT
+/*
+ * check_passwd - Check the user name and passwd against the PAP secrets
+ * file.  If requested, also check against the system password database,
+ * and login the user if OK.
+ *
+ * returns:
+ *  UPAP_AUTHNAK: Authentication failed.
+ *  UPAP_AUTHACK: Authentication succeeded.
+ * In either case, msg points to an appropriate message.
+ */
+int
+check_passwd( int unit, char *auser, int userlen, char *apasswd, int passwdlen, char **msg, int *msglen)
+{
+#if 1
+  LWIP_UNUSED_ARG(unit);
+  LWIP_UNUSED_ARG(auser);
+  LWIP_UNUSED_ARG(userlen);
+  LWIP_UNUSED_ARG(apasswd);
+  LWIP_UNUSED_ARG(passwdlen);
+  LWIP_UNUSED_ARG(msglen);
+  *msg = (char *) 0;
+  return UPAP_AUTHACK;     /* XXX Assume all entries OK. */
+#else
+  int ret = 0;
+  struct wordlist *addrs = NULL;
+  char passwd[256], user[256];
+  char secret[MAXWORDLEN];
+  static u_short attempts = 0;
+  
+  /*
+   * Make copies of apasswd and auser, then null-terminate them.
+   */
+  BCOPY(apasswd, passwd, passwdlen);
+  passwd[passwdlen] = '\0';
+  BCOPY(auser, user, userlen);
+  user[userlen] = '\0';
+  *msg = (char *) 0;
+
+  /* XXX Validate user name and password. */
+  ret = UPAP_AUTHACK;     /* XXX Assume all entries OK. */
+      
+  if (ret == UPAP_AUTHNAK) {
+    if (*msg == (char *) 0) {
+      *msg = "Login incorrect";
+    }
+    *msglen = strlen(*msg);
+    /*
+     * Frustrate passwd stealer programs.
+     * Allow 10 tries, but start backing off after 3 (stolen from login).
+     * On 10'th, drop the connection.
+     */
+    if (attempts++ >= 10) {
+      AUTHDEBUG((LOG_WARNING, "%d LOGIN FAILURES BY %s\n", attempts, user));
+      /*ppp_panic("Excess Bad Logins");*/
+    }
+    if (attempts > 3) {
+      sys_msleep((attempts - 3) * 5);
+    }
+    if (addrs != NULL) {
+      free_wordlist(addrs);
+    }
+  } else {
+    attempts = 0; /* Reset count */
+    if (*msg == (char *) 0) {
+      *msg = "Login ok";
+    }
+    *msglen = strlen(*msg);
+    set_allowed_addrs(unit, addrs);
+  }
+
+  BZERO(passwd, sizeof(passwd));
+  BZERO(secret, sizeof(secret));
+
+  return ret;
+#endif
+}
+#endif /* PAP_SUPPORT */
+
+
+/*
+ * auth_ip_addr - check whether the peer is authorized to use
+ * a given IP address.  Returns 1 if authorized, 0 otherwise.
+ */
+int
+auth_ip_addr(int unit, u32_t addr)
+{
+  return ip_addr_check(addr, addresses[unit]);
+}
+
+/*
+ * bad_ip_adrs - return 1 if the IP address is one we don't want
+ * to use, such as an address in the loopback net or a multicast address.
+ * addr is in network byte order.
+ */
+int
+bad_ip_adrs(u32_t addr)
+{
+  addr = ntohl(addr);
+  return (addr >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET
+      || IN_MULTICAST(addr) || IN_BADCLASS(addr);
+}
+
+
+#if CHAP_SUPPORT
+/*
+ * get_secret - open the CHAP secret file and return the secret
+ * for authenticating the given client on the given server.
+ * (We could be either client or server).
+ */
+int get_secret( int unit, char *client, char *server, char *secret, int *secret_len, int save_addrs)
+{
+#if 1
+  int len;
+  struct wordlist *addrs;
+
+  LWIP_UNUSED_ARG(unit);
+  LWIP_UNUSED_ARG(server);
+  LWIP_UNUSED_ARG(save_addrs);
+
+  addrs = NULL;
+
+  if(!client || !client[0] || strcmp(client, ppp_settings.user)) {
+    return 0;
+  }
+
+  len = strlen(ppp_settings.passwd);
+  if (len > MAXSECRETLEN) {
+    AUTHDEBUG((LOG_ERR, "Secret for %s on %s is too long\n", client, server));
+    len = MAXSECRETLEN;
+  }
+
+  BCOPY(ppp_settings.passwd, secret, len);
+  *secret_len = len;
+
+  return 1;
+#else
+  int ret = 0, len;
+  struct wordlist *addrs;
+  char secbuf[MAXWORDLEN];
+  
+  addrs = NULL;
+  secbuf[0] = 0;
+
+  /* XXX Find secret. */
+  if (ret < 0) {
+    return 0;
+  }
+
+  if (save_addrs) {
+    set_allowed_addrs(unit, addrs);
+  }
+
+  len = strlen(secbuf);
+  if (len > MAXSECRETLEN) {
+    AUTHDEBUG((LOG_ERR, "Secret for %s on %s is too long\n", client, server));
+    len = MAXSECRETLEN;
+  }
+
+  BCOPY(secbuf, secret, len);
+  BZERO(secbuf, sizeof(secbuf));
+  *secret_len = len;
+
+  return 1;
+#endif
+}
+#endif /* CHAP_SUPPORT */
+
+
+#if 0 /* UNUSED */
+/*
+ * auth_check_options - called to check authentication options.
+ */
+void
+auth_check_options(void)
+{
+  lcp_options *wo = &lcp_wantoptions[0];
+  int can_auth;
+  ipcp_options *ipwo = &ipcp_wantoptions[0];
+  u32_t remote;
+
+  /* Default our_name to hostname, and user to our_name */
+  if (ppp_settings.our_name[0] == 0 || ppp_settings.usehostname) {
+      strcpy(ppp_settings.our_name, ppp_settings.hostname);
+  }
+
+  if (ppp_settings.user[0] == 0) {
+    strcpy(ppp_settings.user, ppp_settings.our_name);
+  }
+
+  /* If authentication is required, ask peer for CHAP or PAP. */
+  if (ppp_settings.auth_required && !wo->neg_chap && !wo->neg_upap) {
+    wo->neg_chap = 1;
+    wo->neg_upap = 1;
+  }
+  
+  /*
+   * Check whether we have appropriate secrets to use
+   * to authenticate the peer.
+   */
+  can_auth = wo->neg_upap && have_pap_secret();
+  if (!can_auth && wo->neg_chap) {
+    remote = ipwo->accept_remote? 0: ipwo->hisaddr;
+    can_auth = have_chap_secret(ppp_settings.remote_name, ppp_settings.our_name, remote);
+  }
+
+  if (ppp_settings.auth_required && !can_auth) {
+    ppp_panic("No auth secret");
+  }
+}
+#endif
+
+
+/**********************************/
+/*** LOCAL FUNCTION DEFINITIONS ***/
+/**********************************/
+/*
+ * Proceed to the network phase.
+ */
+static void
+network_phase(int unit)
+{
+  int i;
+  struct protent *protp;
+  lcp_options *go = &lcp_gotoptions[unit];
+  
+  /*
+   * If the peer had to authenticate, run the auth-up script now.
+   */
+  if ((go->neg_chap || go->neg_upap) && !did_authup) {
+    /* XXX Do setup for peer authentication. */
+    did_authup = 1;
+  }
+
+#if CBCP_SUPPORT
+  /*
+   * If we negotiated callback, do it now.
+   */
+  if (go->neg_cbcp) {
+    lcp_phase[unit] = PHASE_CALLBACK;
+    (*cbcp_protent.open)(unit);
+    return;
+  }
+#endif /* CBCP_SUPPORT */
+
+  lcp_phase[unit] = PHASE_NETWORK;
+  for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
+    if (protp->protocol < 0xC000 && protp->enabled_flag && protp->open != NULL) {
+      (*protp->open)(unit);
+      if (protp->protocol != PPP_CCP) {
+        ++num_np_open;
+      }
+    }
+  }
+
+  if (num_np_open == 0) {
+    /* nothing to do */
+    lcp_close(0, "No network protocols running");
+  }
+}
+
+/*
+ * check_idle - check whether the link has been idle for long
+ * enough that we can shut it down.
+ */
+static void
+check_idle(void *arg)
+{
+  struct ppp_idle idle;
+  u_short itime;
+  
+  LWIP_UNUSED_ARG(arg);
+  if (!get_idle_time(0, &idle)) {
+    return;
+  }
+  itime = LWIP_MIN(idle.xmit_idle, idle.recv_idle);
+  if (itime >= ppp_settings.idle_time_limit) {
+    /* link is idle: shut it down. */
+    AUTHDEBUG((LOG_INFO, "Terminating connection due to lack of activity.\n"));
+    lcp_close(0, "Link inactive");
+  } else {
+    TIMEOUT(check_idle, NULL, ppp_settings.idle_time_limit - itime);
+  }
+}
+
+/*
+ * connect_time_expired - log a message and close the connection.
+ */
+static void
+connect_time_expired(void *arg)
+{
+  LWIP_UNUSED_ARG(arg);
+
+  AUTHDEBUG((LOG_INFO, "Connect time expired\n"));
+  lcp_close(0, "Connect time expired");   /* Close connection */
+}
+
+#if 0
+/*
+ * login - Check the user name and password against the system
+ * password database, and login the user if OK.
+ *
+ * returns:
+ *  UPAP_AUTHNAK: Login failed.
+ *  UPAP_AUTHACK: Login succeeded.
+ * In either case, msg points to an appropriate message.
+ */
+static int
+login(char *user, char *passwd, char **msg, int *msglen)
+{
+  /* XXX Fail until we decide that we want to support logins. */
+  return (UPAP_AUTHNAK);
+}
+#endif
+
+/*
+ * logout - Logout the user.
+ */
+static void
+logout(void)
+{
+  logged_in = 0;
+}
+
+/*
+ * null_login - Check if a username of "" and a password of "" are
+ * acceptable, and iff so, set the list of acceptable IP addresses
+ * and return 1.
+ */
+static int
+null_login(int unit)
+{
+  LWIP_UNUSED_ARG(unit);
+  /* XXX Fail until we decide that we want to support logins. */
+  return 0;
+}
+
+/*
+ * get_pap_passwd - get a password for authenticating ourselves with
+ * our peer using PAP.  Returns 1 on success, 0 if no suitable password
+ * could be found.
+ */
+static int
+get_pap_passwd(int unit, char *user, char *passwd)
+{
+  LWIP_UNUSED_ARG(unit);
+/* normally we would reject PAP if no password is provided,
+   but this causes problems with some providers (like CHT in Taiwan)
+   who incorrectly request PAP and expect a bogus/empty password, so
+   always provide a default user/passwd of "none"/"none"
+*/
+  if(user) {
+    strcpy(user, "none");
+  }
+  if(passwd) {
+    strcpy(passwd, "none");
+  }
+  return 1;
+}
+
+/*
+ * have_pap_secret - check whether we have a PAP file with any
+ * secrets that we could possibly use for authenticating the peer.
+ */
+static int
+have_pap_secret(void)
+{
+  /* XXX Fail until we set up our passwords. */
+  return 0;
+}
+
+/*
+ * have_chap_secret - check whether we have a CHAP file with a
+ * secret that we could possibly use for authenticating `client'
+ * on `server'.  Either can be the null string, meaning we don't
+ * know the identity yet.
+ */
+static int
+have_chap_secret(char *client, char *server, u32_t remote)
+{
+  LWIP_UNUSED_ARG(client);
+  LWIP_UNUSED_ARG(server);
+  LWIP_UNUSED_ARG(remote);
+  /* XXX Fail until we set up our passwords. */
+  return 0;
+}
+
+#if 0 /* PAP_SUPPORT || CHAP_SUPPORT */
+/*
+ * set_allowed_addrs() - set the list of allowed addresses.
+ */
+static void
+set_allowed_addrs(int unit, struct wordlist *addrs)
+{
+  if (addresses[unit] != NULL) {
+    free_wordlist(addresses[unit]);
+  }
+  addresses[unit] = addrs;
+
+#if 0
+  /*
+   * If there's only one authorized address we might as well
+   * ask our peer for that one right away
+   */
+  if (addrs != NULL && addrs->next == NULL) {
+    char *p = addrs->word;
+    struct ipcp_options *wo = &ipcp_wantoptions[unit];
+    u32_t a;
+    struct hostent *hp;
+    
+    if (wo->hisaddr == 0 && *p != '!' && *p != '-' && strchr(p, '/') == NULL) {
+      hp = gethostbyname(p);
+      if (hp != NULL && hp->h_addrtype == AF_INET) {
+        a = *(u32_t *)hp->h_addr;
+      } else {
+        a = inet_addr(p);
+      }
+      if (a != (u32_t) -1) {
+        wo->hisaddr = a;
+      }
+    }
+  }
+#endif
+}
+#endif /* 0 */ /* PAP_SUPPORT || CHAP_SUPPORT */
+
+static int
+ip_addr_check(u32_t addr, struct wordlist *addrs)
+{
+  /* don't allow loopback or multicast address */
+  if (bad_ip_adrs(addr)) {
+    return 0;
+  }
+
+  if (addrs == NULL) {
+    return !ppp_settings.auth_required; /* no addresses authorized */
+  }
+
+  /* XXX All other addresses allowed. */
+  return 1;
+}
+
+#if 0 /* PAP_SUPPORT || CHAP_SUPPORT */
+/*
+ * free_wordlist - release memory allocated for a wordlist.
+ */
+static void
+free_wordlist(struct wordlist *wp)
+{
+  struct wordlist *next;
+  
+  while (wp != NULL) {
+    next = wp->next;
+    free(wp);
+    wp = next;
+  }
+}
+#endif  /* 0 */ /* PAP_SUPPORT || CHAP_SUPPORT */
+
+#endif /* PPP_SUPPORT */