/*
|
/*
|
* auth.c - PPP authentication and phase control.
|
* auth.c - PPP authentication and phase control.
|
*
|
*
|
* Copyright (c) 1993 The Australian National University.
|
* Copyright (c) 1993 The Australian National University.
|
* All rights reserved.
|
* All rights reserved.
|
*
|
*
|
* Redistribution and use in source and binary forms are permitted
|
* Redistribution and use in source and binary forms are permitted
|
* provided that the above copyright notice and this paragraph are
|
* provided that the above copyright notice and this paragraph are
|
* duplicated in all such forms and that any documentation,
|
* duplicated in all such forms and that any documentation,
|
* advertising materials, and other materials related to such
|
* advertising materials, and other materials related to such
|
* distribution and use acknowledge that the software was developed
|
* distribution and use acknowledge that the software was developed
|
* by the Australian National University. The name of the University
|
* by the Australian National University. The name of the University
|
* may not be used to endorse or promote products derived from this
|
* may not be used to endorse or promote products derived from this
|
* software without specific prior written permission.
|
* software without specific prior written permission.
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
|
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
|
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
|
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
*
|
*
|
* Copyright (c) 1989 Carnegie Mellon University.
|
* Copyright (c) 1989 Carnegie Mellon University.
|
* All rights reserved.
|
* All rights reserved.
|
*
|
*
|
* Redistribution and use in source and binary forms are permitted
|
* Redistribution and use in source and binary forms are permitted
|
* provided that the above copyright notice and this paragraph are
|
* provided that the above copyright notice and this paragraph are
|
* duplicated in all such forms and that any documentation,
|
* duplicated in all such forms and that any documentation,
|
* advertising materials, and other materials related to such
|
* advertising materials, and other materials related to such
|
* distribution and use acknowledge that the software was developed
|
* distribution and use acknowledge that the software was developed
|
* by Carnegie Mellon University. The name of the
|
* by Carnegie Mellon University. The name of the
|
* University may not be used to endorse or promote products derived
|
* University may not be used to endorse or promote products derived
|
* from this software without specific prior written permission.
|
* from this software without specific prior written permission.
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
|
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
|
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
|
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
*/
|
*/
|
|
|
#ifndef lint
|
#ifndef lint
|
/* static char rcsid[] = "$Id: auth.c,v 1.2 2001-09-27 12:01:57 chris Exp $"; */
|
/* static char rcsid[] = "$Id: auth.c,v 1.2 2001-09-27 12:01:57 chris Exp $"; */
|
#endif
|
#endif
|
|
|
#include <stdio.h>
|
#include <stdio.h>
|
#include <stddef.h>
|
#include <stddef.h>
|
#include <stdlib.h>
|
#include <stdlib.h>
|
#include <unistd.h>
|
#include <unistd.h>
|
#include <syslog.h>
|
#include <syslog.h>
|
#include <pwd.h>
|
#include <pwd.h>
|
#include <string.h>
|
#include <string.h>
|
#include <sys/types.h>
|
#include <sys/types.h>
|
#include <sys/stat.h>
|
#include <sys/stat.h>
|
#include <sys/socket.h>
|
#include <sys/socket.h>
|
|
|
#include <fcntl.h>
|
#include <fcntl.h>
|
#if defined(_PATH_LASTLOG) && defined(_linux_)
|
#if defined(_PATH_LASTLOG) && defined(_linux_)
|
#include <lastlog.h>
|
#include <lastlog.h>
|
#endif
|
#endif
|
|
|
#include <netdb.h>
|
#include <netdb.h>
|
#include <netinet/in.h>
|
#include <netinet/in.h>
|
#include <arpa/inet.h>
|
#include <arpa/inet.h>
|
/* #include <stbconfig.h> */
|
/* #include <stbconfig.h> */
|
|
|
#include "pppd.h"
|
#include "pppd.h"
|
#include "fsm.h"
|
#include "fsm.h"
|
#include "lcp.h"
|
#include "lcp.h"
|
#include "ipcp.h"
|
#include "ipcp.h"
|
#include "upap.h"
|
#include "upap.h"
|
#include "chap.h"
|
#include "chap.h"
|
#ifdef CBCP_SUPPORT
|
#ifdef CBCP_SUPPORT
|
#include "cbcp.h"
|
#include "cbcp.h"
|
#endif
|
#endif
|
#include "pathnames.h"
|
#include "pathnames.h"
|
|
|
/* Used for storing a sequence of words. Usually malloced. */
|
/* Used for storing a sequence of words. Usually malloced. */
|
struct wordlist {
|
struct wordlist {
|
struct wordlist *next;
|
struct wordlist *next;
|
char word[1];
|
char word[1];
|
};
|
};
|
|
|
/* Bits in scan_authfile return value */
|
/* Bits in scan_authfile return value */
|
#define NONWILD_SERVER 1
|
#define NONWILD_SERVER 1
|
#define NONWILD_CLIENT 2
|
#define NONWILD_CLIENT 2
|
|
|
#define ISWILD(word) (word[0] == '*' && word[1] == 0)
|
#define ISWILD(word) (word[0] == '*' && word[1] == 0)
|
|
|
#define FALSE 0
|
#define FALSE 0
|
#define TRUE 1
|
#define TRUE 1
|
|
|
/* The name by which the peer authenticated itself to us. */
|
/* The name by which the peer authenticated itself to us. */
|
char peer_authname[MAXNAMELEN];
|
char peer_authname[MAXNAMELEN];
|
|
|
/* Records which authentication operations haven't completed yet. */
|
/* Records which authentication operations haven't completed yet. */
|
static int auth_pending[NUM_PPP];
|
static int auth_pending[NUM_PPP];
|
|
|
/* Set if we have successfully called plogin() */
|
/* Set if we have successfully called plogin() */
|
static int logged_in;
|
static int logged_in;
|
|
|
/* Set if we have run the /etc/ppp/auth-up script. */
|
/* Set if we have run the /etc/ppp/auth-up script. */
|
static int did_authup;
|
static int did_authup;
|
|
|
/* List of addresses which the peer may use. */
|
/* List of addresses which the peer may use. */
|
static struct wordlist *addresses[NUM_PPP];
|
static struct wordlist *addresses[NUM_PPP];
|
|
|
/* Number of network protocols which we have opened. */
|
/* Number of network protocols which we have opened. */
|
static int num_np_open;
|
static int num_np_open;
|
|
|
/* Number of network protocols which have come up. */
|
/* Number of network protocols which have come up. */
|
static int num_np_up;
|
static int num_np_up;
|
|
|
/* Set if we got the contents of passwd[] from the pap-secrets file. */
|
/* Set if we got the contents of passwd[] from the pap-secrets file. */
|
static int passwd_from_file;
|
static int passwd_from_file;
|
|
|
/* Bits in auth_pending[] */
|
/* Bits in auth_pending[] */
|
#define PAP_WITHPEER 1
|
#define PAP_WITHPEER 1
|
#define PAP_PEER 2
|
#define PAP_PEER 2
|
#define CHAP_WITHPEER 4
|
#define CHAP_WITHPEER 4
|
#define CHAP_PEER 8
|
#define CHAP_PEER 8
|
|
|
extern char *crypt __P((const char *, const char *));
|
extern char *crypt __P((const char *, const char *));
|
|
|
/* Prototypes for procedures local to this file. */
|
/* Prototypes for procedures local to this file. */
|
|
|
static void network_phase __P((int));
|
static void network_phase __P((int));
|
static void check_idle __P((void *));
|
static void check_idle __P((void *));
|
static void connect_time_expired __P((void *));
|
static void connect_time_expired __P((void *));
|
static int plogin __P((char *, char *, char **, int *));
|
static int plogin __P((char *, char *, char **, int *));
|
static void plogout __P((void));
|
static void plogout __P((void));
|
static int null_login __P((int));
|
static int null_login __P((int));
|
static int get_pap_passwd __P((char *));
|
static int get_pap_passwd __P((char *));
|
static int have_pap_secret __P((void));
|
static int have_pap_secret __P((void));
|
static int have_chap_secret __P((char *, char *, u_int32_t));
|
static int have_chap_secret __P((char *, char *, u_int32_t));
|
static int ip_addr_check __P((u_int32_t, struct wordlist *));
|
static int ip_addr_check __P((u_int32_t, struct wordlist *));
|
static int scan_authfile __P((FILE *, char *, char *, u_int32_t, char *,
|
static int scan_authfile __P((FILE *, char *, char *, u_int32_t, char *,
|
struct wordlist **, char *));
|
struct wordlist **, char *));
|
static void free_wordlist __P((struct wordlist *));
|
static void free_wordlist __P((struct wordlist *));
|
static void auth_script __P((char *));
|
static void auth_script __P((char *));
|
static void set_allowed_addrs __P((int, struct wordlist *));
|
static void set_allowed_addrs __P((int, struct wordlist *));
|
|
|
/*
|
/*
|
* An Open on LCP has requested a change from Dead to Establish phase.
|
* An Open on LCP has requested a change from Dead to Establish phase.
|
* Do what's necessary to bring the physical layer up.
|
* Do what's necessary to bring the physical layer up.
|
*/
|
*/
|
void
|
void
|
link_required(unit)
|
link_required(unit)
|
int unit;
|
int unit;
|
{
|
{
|
}
|
}
|
|
|
/*
|
/*
|
* LCP has terminated the link; go to the Dead phase and take the
|
* LCP has terminated the link; go to the Dead phase and take the
|
* physical layer down.
|
* physical layer down.
|
*/
|
*/
|
void
|
void
|
link_terminated(unit)
|
link_terminated(unit)
|
int unit;
|
int unit;
|
{
|
{
|
if (phase == PHASE_DEAD)
|
if (phase == PHASE_DEAD)
|
return;
|
return;
|
if (logged_in)
|
if (logged_in)
|
plogout();
|
plogout();
|
phase = PHASE_DEAD;
|
phase = PHASE_DEAD;
|
syslog(LOG_NOTICE, "Connection terminated.");
|
syslog(LOG_NOTICE, "Connection terminated.");
|
}
|
}
|
|
|
/*
|
/*
|
* LCP has gone down; it will either die or try to re-establish.
|
* LCP has gone down; it will either die or try to re-establish.
|
*/
|
*/
|
void
|
void
|
link_down(unit)
|
link_down(unit)
|
int unit;
|
int unit;
|
{
|
{
|
int i;
|
int i;
|
struct protent *protp;
|
struct protent *protp;
|
|
|
did_authup = 0;
|
did_authup = 0;
|
for (i = 0; (protp = protocols[i]) != NULL; ++i) {
|
for (i = 0; (protp = protocols[i]) != NULL; ++i) {
|
if (!protp->enabled_flag)
|
if (!protp->enabled_flag)
|
continue;
|
continue;
|
if (protp->protocol != PPP_LCP && protp->lowerdown != NULL)
|
if (protp->protocol != PPP_LCP && protp->lowerdown != NULL)
|
(*protp->lowerdown)(unit);
|
(*protp->lowerdown)(unit);
|
if (protp->protocol < 0xC000 && protp->close != NULL)
|
if (protp->protocol < 0xC000 && protp->close != NULL)
|
(*protp->close)(unit, "LCP down");
|
(*protp->close)(unit, "LCP down");
|
}
|
}
|
num_np_open = 0;
|
num_np_open = 0;
|
num_np_up = 0;
|
num_np_up = 0;
|
if (phase != PHASE_DEAD)
|
if (phase != PHASE_DEAD)
|
phase = PHASE_TERMINATE;
|
phase = PHASE_TERMINATE;
|
}
|
}
|
|
|
/*
|
/*
|
* The link is established.
|
* The link is established.
|
* Proceed to the Dead, Authenticate or Network phase as appropriate.
|
* Proceed to the Dead, Authenticate or Network phase as appropriate.
|
*/
|
*/
|
void
|
void
|
link_established(unit)
|
link_established(unit)
|
int unit;
|
int unit;
|
{
|
{
|
int auth;
|
int auth;
|
lcp_options *wo = &lcp_wantoptions[unit];
|
lcp_options *wo = &lcp_wantoptions[unit];
|
lcp_options *go = &lcp_gotoptions[unit];
|
lcp_options *go = &lcp_gotoptions[unit];
|
lcp_options *ho = &lcp_hisoptions[unit];
|
lcp_options *ho = &lcp_hisoptions[unit];
|
int i;
|
int i;
|
struct protent *protp;
|
struct protent *protp;
|
|
|
/*
|
/*
|
* Tell higher-level protocols that LCP is up.
|
* Tell higher-level protocols that LCP is up.
|
*/
|
*/
|
for (i = 0; (protp = protocols[i]) != NULL; ++i)
|
for (i = 0; (protp = protocols[i]) != NULL; ++i)
|
if (protp->protocol != PPP_LCP && protp->enabled_flag
|
if (protp->protocol != PPP_LCP && protp->enabled_flag
|
&& protp->lowerup != NULL)
|
&& protp->lowerup != NULL)
|
(*protp->lowerup)(unit);
|
(*protp->lowerup)(unit);
|
|
|
if (auth_required && !(go->neg_chap || go->neg_upap)) {
|
if (auth_required && !(go->neg_chap || go->neg_upap)) {
|
/*
|
/*
|
* We wanted the peer to authenticate itself, and it refused:
|
* We wanted the peer to authenticate itself, and it refused:
|
* treat it as though it authenticated with PAP using a username
|
* treat it as though it authenticated with PAP using a username
|
* of "" and a password of "". If that's not OK, boot it out.
|
* of "" and a password of "". If that's not OK, boot it out.
|
*/
|
*/
|
if (!wo->neg_upap || !null_login(unit)) {
|
if (!wo->neg_upap || !null_login(unit)) {
|
lcp_close(unit, "peer refused to authenticate");
|
lcp_close(unit, "peer refused to authenticate");
|
return;
|
return;
|
}
|
}
|
}
|
}
|
|
|
phase = PHASE_AUTHENTICATE;
|
phase = PHASE_AUTHENTICATE;
|
auth = 0;
|
auth = 0;
|
if (go->neg_chap) {
|
if (go->neg_chap) {
|
ChapAuthPeer(unit, our_name, go->chap_mdtype);
|
ChapAuthPeer(unit, our_name, go->chap_mdtype);
|
auth |= CHAP_PEER;
|
auth |= CHAP_PEER;
|
} else if (go->neg_upap) {
|
} else if (go->neg_upap) {
|
upap_authpeer(unit);
|
upap_authpeer(unit);
|
auth |= PAP_PEER;
|
auth |= PAP_PEER;
|
}
|
}
|
if (ho->neg_chap) {
|
if (ho->neg_chap) {
|
ChapAuthWithPeer(unit, user, ho->chap_mdtype);
|
ChapAuthWithPeer(unit, user, ho->chap_mdtype);
|
auth |= CHAP_WITHPEER;
|
auth |= CHAP_WITHPEER;
|
} else if (ho->neg_upap) {
|
} else if (ho->neg_upap) {
|
if (passwd[0] == 0) {
|
if (passwd[0] == 0) {
|
passwd_from_file = 1;
|
passwd_from_file = 1;
|
get_pap_passwd(passwd);
|
get_pap_passwd(passwd);
|
}
|
}
|
upap_authwithpeer(unit, user, passwd);
|
upap_authwithpeer(unit, user, passwd);
|
auth |= PAP_WITHPEER;
|
auth |= PAP_WITHPEER;
|
}
|
}
|
auth_pending[unit] = auth;
|
auth_pending[unit] = auth;
|
|
|
if (!auth)
|
if (!auth)
|
network_phase(unit);
|
network_phase(unit);
|
}
|
}
|
|
|
/*
|
/*
|
* Proceed to the network phase.
|
* Proceed to the network phase.
|
*/
|
*/
|
static void
|
static void
|
network_phase(unit)
|
network_phase(unit)
|
int unit;
|
int unit;
|
{
|
{
|
int i;
|
int i;
|
struct protent *protp;
|
struct protent *protp;
|
lcp_options *go = &lcp_gotoptions[unit];
|
lcp_options *go = &lcp_gotoptions[unit];
|
|
|
/*
|
/*
|
* If the peer had to authenticate, run the auth-up script now.
|
* If the peer had to authenticate, run the auth-up script now.
|
*/
|
*/
|
if ((go->neg_chap || go->neg_upap) && !did_authup) {
|
if ((go->neg_chap || go->neg_upap) && !did_authup) {
|
auth_script(_PATH_AUTHUP);
|
auth_script(_PATH_AUTHUP);
|
did_authup = 1;
|
did_authup = 1;
|
}
|
}
|
|
|
#ifdef CBCP_SUPPORT
|
#ifdef CBCP_SUPPORT
|
/*
|
/*
|
* If we negotiated callback, do it now.
|
* If we negotiated callback, do it now.
|
*/
|
*/
|
if (go->neg_cbcp) {
|
if (go->neg_cbcp) {
|
phase = PHASE_CALLBACK;
|
phase = PHASE_CALLBACK;
|
(*cbcp_protent.open)(unit);
|
(*cbcp_protent.open)(unit);
|
return;
|
return;
|
}
|
}
|
#endif
|
#endif
|
|
|
phase = PHASE_NETWORK;
|
phase = PHASE_NETWORK;
|
|
|
for (i = 0; (protp = protocols[i]) != NULL; ++i)
|
for (i = 0; (protp = protocols[i]) != NULL; ++i)
|
if (protp->protocol < 0xC000 && protp->enabled_flag
|
if (protp->protocol < 0xC000 && protp->enabled_flag
|
&& protp->open != NULL) {
|
&& protp->open != NULL) {
|
(*protp->open)(unit);
|
(*protp->open)(unit);
|
if (protp->protocol != PPP_CCP)
|
if (protp->protocol != PPP_CCP)
|
++num_np_open;
|
++num_np_open;
|
}
|
}
|
|
|
if (num_np_open == 0)
|
if (num_np_open == 0)
|
/* nothing to do */
|
/* nothing to do */
|
lcp_close(0, "No network protocols running");
|
lcp_close(0, "No network protocols running");
|
}
|
}
|
|
|
/*
|
/*
|
* The peer has failed to authenticate himself using `protocol'.
|
* The peer has failed to authenticate himself using `protocol'.
|
*/
|
*/
|
void
|
void
|
auth_peer_fail(unit, protocol)
|
auth_peer_fail(unit, protocol)
|
int unit, protocol;
|
int unit, protocol;
|
{
|
{
|
/*
|
/*
|
* Authentication failure: take the link down
|
* Authentication failure: take the link down
|
*/
|
*/
|
lcp_close(unit, "Authentication failed");
|
lcp_close(unit, "Authentication failed");
|
}
|
}
|
|
|
/*
|
/*
|
* The peer has been successfully authenticated using `protocol'.
|
* The peer has been successfully authenticated using `protocol'.
|
*/
|
*/
|
void
|
void
|
auth_peer_success(unit, protocol, name, namelen)
|
auth_peer_success(unit, protocol, name, namelen)
|
int unit, protocol;
|
int unit, protocol;
|
char *name;
|
char *name;
|
int namelen;
|
int namelen;
|
{
|
{
|
int bit;
|
int bit;
|
|
|
switch (protocol) {
|
switch (protocol) {
|
case PPP_CHAP:
|
case PPP_CHAP:
|
bit = CHAP_PEER;
|
bit = CHAP_PEER;
|
break;
|
break;
|
case PPP_PAP:
|
case PPP_PAP:
|
bit = PAP_PEER;
|
bit = PAP_PEER;
|
break;
|
break;
|
default:
|
default:
|
syslog(LOG_WARNING, "auth_peer_success: unknown protocol %x",
|
syslog(LOG_WARNING, "auth_peer_success: unknown protocol %x",
|
protocol);
|
protocol);
|
return;
|
return;
|
}
|
}
|
|
|
/*
|
/*
|
* Save the authenticated name of the peer for later.
|
* Save the authenticated name of the peer for later.
|
*/
|
*/
|
if (namelen > sizeof(peer_authname) - 1)
|
if (namelen > sizeof(peer_authname) - 1)
|
namelen = sizeof(peer_authname) - 1;
|
namelen = sizeof(peer_authname) - 1;
|
BCOPY(name, peer_authname, namelen);
|
BCOPY(name, peer_authname, namelen);
|
peer_authname[namelen] = 0;
|
peer_authname[namelen] = 0;
|
/*
|
/*
|
* If there is no more authentication still to be done,
|
* If there is no more authentication still to be done,
|
* proceed to the network (or callback) phase.
|
* proceed to the network (or callback) phase.
|
*/
|
*/
|
if ((auth_pending[unit] &= ~bit) == 0)
|
if ((auth_pending[unit] &= ~bit) == 0)
|
network_phase(unit);
|
network_phase(unit);
|
}
|
}
|
|
|
/*
|
/*
|
* We have failed to authenticate ourselves to the peer using `protocol'.
|
* We have failed to authenticate ourselves to the peer using `protocol'.
|
*/
|
*/
|
void
|
void
|
auth_withpeer_fail(unit, protocol)
|
auth_withpeer_fail(unit, protocol)
|
int unit, protocol;
|
int unit, protocol;
|
{
|
{
|
if (passwd_from_file)
|
if (passwd_from_file)
|
BZERO(passwd, MAXSECRETLEN);
|
BZERO(passwd, MAXSECRETLEN);
|
/*
|
/*
|
* We've failed to authenticate ourselves to our peer.
|
* We've failed to authenticate ourselves to our peer.
|
* He'll probably take the link down, and there's not much
|
* He'll probably take the link down, and there's not much
|
* we can do except wait for that.
|
* we can do except wait for that.
|
*/
|
*/
|
}
|
}
|
|
|
/*
|
/*
|
* We have successfully authenticated ourselves with the peer using `protocol'.
|
* We have successfully authenticated ourselves with the peer using `protocol'.
|
*/
|
*/
|
void
|
void
|
auth_withpeer_success(unit, protocol)
|
auth_withpeer_success(unit, protocol)
|
int unit, protocol;
|
int unit, protocol;
|
{
|
{
|
int bit;
|
int bit;
|
|
|
switch (protocol) {
|
switch (protocol) {
|
case PPP_CHAP:
|
case PPP_CHAP:
|
bit = CHAP_WITHPEER;
|
bit = CHAP_WITHPEER;
|
break;
|
break;
|
case PPP_PAP:
|
case PPP_PAP:
|
if (passwd_from_file)
|
if (passwd_from_file)
|
BZERO(passwd, MAXSECRETLEN);
|
BZERO(passwd, MAXSECRETLEN);
|
bit = PAP_WITHPEER;
|
bit = PAP_WITHPEER;
|
break;
|
break;
|
default:
|
default:
|
|
|
bit = 0;
|
bit = 0;
|
}
|
}
|
|
|
/*
|
/*
|
* If there is no more authentication still being done,
|
* If there is no more authentication still being done,
|
* proceed to the network (or callback) phase.
|
* proceed to the network (or callback) phase.
|
*/
|
*/
|
if ((auth_pending[unit] &= ~bit) == 0)
|
if ((auth_pending[unit] &= ~bit) == 0)
|
network_phase(unit);
|
network_phase(unit);
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* np_up - a network protocol has come up.
|
* np_up - a network protocol has come up.
|
*/
|
*/
|
void
|
void
|
np_up(unit, proto)
|
np_up(unit, proto)
|
int unit, proto;
|
int unit, proto;
|
{
|
{
|
if (num_np_up == 0) {
|
if (num_np_up == 0) {
|
/*
|
/*
|
* At this point we consider that the link has come up successfully.
|
* At this point we consider that the link has come up successfully.
|
*/
|
*/
|
need_holdoff = 0;
|
need_holdoff = 0;
|
|
|
if (idle_time_limit > 0)
|
if (idle_time_limit > 0)
|
TIMEOUT(check_idle, NULL, idle_time_limit);
|
TIMEOUT(check_idle, NULL, idle_time_limit);
|
|
|
/*
|
/*
|
* Set a timeout to close the connection once the maximum
|
* Set a timeout to close the connection once the maximum
|
* connect time has expired.
|
* connect time has expired.
|
*/
|
*/
|
if (maxconnect > 0)
|
if (maxconnect > 0)
|
TIMEOUT(connect_time_expired, 0, maxconnect);
|
TIMEOUT(connect_time_expired, 0, maxconnect);
|
|
|
/*
|
/*
|
* Detach now, if the updetach option was given.
|
* Detach now, if the updetach option was given.
|
*/
|
*/
|
if (nodetach == -1)
|
if (nodetach == -1)
|
detach();
|
detach();
|
}
|
}
|
++num_np_up;
|
++num_np_up;
|
}
|
}
|
|
|
/*
|
/*
|
* np_down - a network protocol has gone down.
|
* np_down - a network protocol has gone down.
|
*/
|
*/
|
void
|
void
|
np_down(unit, proto)
|
np_down(unit, proto)
|
int unit, proto;
|
int unit, proto;
|
{
|
{
|
if (--num_np_up == 0 && idle_time_limit > 0) {
|
if (--num_np_up == 0 && idle_time_limit > 0) {
|
UNTIMEOUT(check_idle, NULL);
|
UNTIMEOUT(check_idle, NULL);
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* np_finished - a network protocol has finished using the link.
|
* np_finished - a network protocol has finished using the link.
|
*/
|
*/
|
void
|
void
|
np_finished(unit, proto)
|
np_finished(unit, proto)
|
int unit, proto;
|
int unit, proto;
|
{
|
{
|
if (--num_np_open <= 0) {
|
if (--num_np_open <= 0) {
|
/* no further use for the link: shut up shop. */
|
/* no further use for the link: shut up shop. */
|
lcp_close(0, "No network protocols running");
|
lcp_close(0, "No network protocols running");
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* check_idle - check whether the link has been idle for long
|
* check_idle - check whether the link has been idle for long
|
* enough that we can shut it down.
|
* enough that we can shut it down.
|
*/
|
*/
|
static void
|
static void
|
check_idle(arg)
|
check_idle(arg)
|
void *arg;
|
void *arg;
|
{
|
{
|
struct ppp_idle idle;
|
struct ppp_idle idle;
|
time_t itime;
|
time_t itime;
|
|
|
if (!get_idle_time(0, &idle))
|
if (!get_idle_time(0, &idle))
|
return;
|
return;
|
itime = MIN(idle.xmit_idle, idle.recv_idle);
|
itime = MIN(idle.xmit_idle, idle.recv_idle);
|
if (itime >= idle_time_limit) {
|
if (itime >= idle_time_limit) {
|
/* link is idle: shut it down. */
|
/* link is idle: shut it down. */
|
syslog(LOG_INFO, "Terminating connection due to lack of activity.");
|
syslog(LOG_INFO, "Terminating connection due to lack of activity.");
|
lcp_close(0, "Link inactive");
|
lcp_close(0, "Link inactive");
|
} else {
|
} else {
|
TIMEOUT(check_idle, NULL, idle_time_limit - itime);
|
TIMEOUT(check_idle, NULL, idle_time_limit - itime);
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* connect_time_expired - log a message and close the connection.
|
* connect_time_expired - log a message and close the connection.
|
*/
|
*/
|
static void
|
static void
|
connect_time_expired(arg)
|
connect_time_expired(arg)
|
void *arg;
|
void *arg;
|
{
|
{
|
syslog(LOG_INFO, "Connect time expired");
|
syslog(LOG_INFO, "Connect time expired");
|
lcp_close(0, "Connect time expired"); /* Close connection */
|
lcp_close(0, "Connect time expired"); /* Close connection */
|
}
|
}
|
|
|
/*
|
/*
|
* auth_check_options - called to check authentication options.
|
* auth_check_options - called to check authentication options.
|
*/
|
*/
|
void
|
void
|
auth_check_options()
|
auth_check_options()
|
{
|
{
|
lcp_options *wo = &lcp_wantoptions[0];
|
lcp_options *wo = &lcp_wantoptions[0];
|
int can_auth;
|
int can_auth;
|
ipcp_options *ipwo = &ipcp_wantoptions[0];
|
ipcp_options *ipwo = &ipcp_wantoptions[0];
|
u_int32_t remote;
|
u_int32_t remote;
|
|
|
/* Default our_name to hostname, and user to our_name */
|
/* Default our_name to hostname, and user to our_name */
|
if (our_name[0] == 0 || usehostname)
|
if (our_name[0] == 0 || usehostname)
|
strcpy(our_name, hostname);
|
strcpy(our_name, hostname);
|
if (user[0] == 0)
|
if (user[0] == 0)
|
strcpy(user, our_name);
|
strcpy(user, our_name);
|
|
|
/* If authentication is required, ask peer for CHAP or PAP. */
|
/* If authentication is required, ask peer for CHAP or PAP. */
|
if (auth_required && !wo->neg_chap && !wo->neg_upap) {
|
if (auth_required && !wo->neg_chap && !wo->neg_upap) {
|
wo->neg_chap = 1;
|
wo->neg_chap = 1;
|
wo->neg_upap = 1;
|
wo->neg_upap = 1;
|
}
|
}
|
|
|
/*
|
/*
|
* Check whether we have appropriate secrets to use
|
* Check whether we have appropriate secrets to use
|
* to authenticate the peer.
|
* to authenticate the peer.
|
*/
|
*/
|
can_auth = wo->neg_upap && (uselogin || have_pap_secret());
|
can_auth = wo->neg_upap && (uselogin || have_pap_secret());
|
if (!can_auth && wo->neg_chap) {
|
if (!can_auth && wo->neg_chap) {
|
remote = ipwo->accept_remote? 0: ipwo->hisaddr;
|
remote = ipwo->accept_remote? 0: ipwo->hisaddr;
|
can_auth = have_chap_secret(remote_name, our_name, remote);
|
can_auth = have_chap_secret(remote_name, our_name, remote);
|
}
|
}
|
|
|
if (auth_required && !can_auth) {
|
if (auth_required && !can_auth) {
|
option_error("peer authentication required but no suitable secret(s) found\n");
|
option_error("peer authentication required but no suitable secret(s) found\n");
|
if (remote_name[0] == 0)
|
if (remote_name[0] == 0)
|
option_error("for authenticating any peer to us (%s)\n", our_name);
|
option_error("for authenticating any peer to us (%s)\n", our_name);
|
else
|
else
|
option_error("for authenticating peer %s to us (%s)\n",
|
option_error("for authenticating peer %s to us (%s)\n",
|
remote_name, our_name);
|
remote_name, our_name);
|
exit(1);
|
exit(1);
|
}
|
}
|
|
|
/*
|
/*
|
* Check whether the user tried to override certain values
|
* Check whether the user tried to override certain values
|
* set by root.
|
* set by root.
|
*/
|
*/
|
if (!auth_required && auth_req_info.priv > 0) {
|
if (!auth_required && auth_req_info.priv > 0) {
|
if (!default_device && devnam_info.priv == 0) {
|
if (!default_device && devnam_info.priv == 0) {
|
option_error("can't override device name when noauth option used");
|
option_error("can't override device name when noauth option used");
|
exit(1);
|
exit(1);
|
}
|
}
|
if ((connector != NULL && connector_info.priv == 0)
|
if ((connector != NULL && connector_info.priv == 0)
|
|| (disconnector != NULL && disconnector_info.priv == 0)
|
|| (disconnector != NULL && disconnector_info.priv == 0)
|
|| (welcomer != NULL && welcomer_info.priv == 0)) {
|
|| (welcomer != NULL && welcomer_info.priv == 0)) {
|
option_error("can't override connect, disconnect or welcome");
|
option_error("can't override connect, disconnect or welcome");
|
option_error("option values when noauth option used");
|
option_error("option values when noauth option used");
|
exit(1);
|
exit(1);
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* auth_reset - called when LCP is starting negotiations to recheck
|
* auth_reset - called when LCP is starting negotiations to recheck
|
* authentication options, i.e. whether we have appropriate secrets
|
* authentication options, i.e. whether we have appropriate secrets
|
* to use for authenticating ourselves and/or the peer.
|
* to use for authenticating ourselves and/or the peer.
|
*/
|
*/
|
void
|
void
|
auth_reset(unit)
|
auth_reset(unit)
|
int unit;
|
int unit;
|
{
|
{
|
lcp_options *go = &lcp_gotoptions[unit];
|
lcp_options *go = &lcp_gotoptions[unit];
|
lcp_options *ao = &lcp_allowoptions[0];
|
lcp_options *ao = &lcp_allowoptions[0];
|
ipcp_options *ipwo = &ipcp_wantoptions[0];
|
ipcp_options *ipwo = &ipcp_wantoptions[0];
|
u_int32_t remote;
|
u_int32_t remote;
|
|
|
ao->neg_upap = !refuse_pap /*&& (passwd[0] != 0 || get_pap_passwd(NULL))*/;
|
ao->neg_upap = !refuse_pap /*&& (passwd[0] != 0 || get_pap_passwd(NULL))*/;
|
ao->neg_chap = !refuse_chap
|
ao->neg_chap = !refuse_chap
|
&& have_chap_secret(user, remote_name, (u_int32_t)0);
|
&& have_chap_secret(user, remote_name, (u_int32_t)0);
|
|
|
if (go->neg_upap && !uselogin && !have_pap_secret())
|
if (go->neg_upap && !uselogin && !have_pap_secret())
|
go->neg_upap = 0;
|
go->neg_upap = 0;
|
if (go->neg_chap) {
|
if (go->neg_chap) {
|
remote = ipwo->accept_remote? 0: ipwo->hisaddr;
|
remote = ipwo->accept_remote? 0: ipwo->hisaddr;
|
if (!have_chap_secret(remote_name, our_name, remote))
|
if (!have_chap_secret(remote_name, our_name, remote))
|
go->neg_chap = 0;
|
go->neg_chap = 0;
|
}
|
}
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* check_passwd - Check the user name and passwd against the PAP secrets
|
* check_passwd - Check the user name and passwd against the PAP secrets
|
* file. If requested, also check against the system password database,
|
* file. If requested, also check against the system password database,
|
* and login the user if OK.
|
* and login the user if OK.
|
*
|
*
|
* returns:
|
* returns:
|
* UPAP_AUTHNAK: Authentication failed.
|
* UPAP_AUTHNAK: Authentication failed.
|
* UPAP_AUTHACK: Authentication succeeded.
|
* UPAP_AUTHACK: Authentication succeeded.
|
* In either case, msg points to an appropriate message.
|
* In either case, msg points to an appropriate message.
|
*/
|
*/
|
int
|
int
|
check_passwd(unit, auser, userlen, apasswd, passwdlen, msg, msglen)
|
check_passwd(unit, auser, userlen, apasswd, passwdlen, msg, msglen)
|
int unit;
|
int unit;
|
char *auser;
|
char *auser;
|
int userlen;
|
int userlen;
|
char *apasswd;
|
char *apasswd;
|
int passwdlen;
|
int passwdlen;
|
char **msg;
|
char **msg;
|
int *msglen;
|
int *msglen;
|
{
|
{
|
|
|
|
|
return UPAP_AUTHNAK;
|
return UPAP_AUTHNAK;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* plogin - Check the user name and password against the system
|
* plogin - Check the user name and password against the system
|
* password database, and login the user if OK.
|
* password database, and login the user if OK.
|
*
|
*
|
* returns:
|
* returns:
|
* UPAP_AUTHNAK: Login failed.
|
* UPAP_AUTHNAK: Login failed.
|
* UPAP_AUTHACK: Login succeeded.
|
* UPAP_AUTHACK: Login succeeded.
|
* In either case, msg points to an appropriate message.
|
* In either case, msg points to an appropriate message.
|
*/
|
*/
|
|
|
static int
|
static int
|
plogin(user, passwd, msg, msglen)
|
plogin(user, passwd, msg, msglen)
|
char *user;
|
char *user;
|
char *passwd;
|
char *passwd;
|
char **msg;
|
char **msg;
|
int *msglen;
|
int *msglen;
|
{
|
{
|
syslog(LOG_INFO, "user %s logged in", user);
|
syslog(LOG_INFO, "user %s logged in", user);
|
logged_in = TRUE;
|
logged_in = TRUE;
|
|
|
return (UPAP_AUTHACK);
|
return (UPAP_AUTHACK);
|
}
|
}
|
|
|
/*
|
/*
|
* plogout - Logout the user.
|
* plogout - Logout the user.
|
*/
|
*/
|
static void
|
static void
|
plogout()
|
plogout()
|
{
|
{
|
|
|
logged_in = FALSE;
|
logged_in = FALSE;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* null_login - Check if a username of "" and a password of "" are
|
* null_login - Check if a username of "" and a password of "" are
|
* acceptable, and iff so, set the list of acceptable IP addresses
|
* acceptable, and iff so, set the list of acceptable IP addresses
|
* and return 1.
|
* and return 1.
|
*/
|
*/
|
static int
|
static int
|
null_login(unit)
|
null_login(unit)
|
int unit;
|
int unit;
|
{
|
{
|
return 1;
|
return 1;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* get_pap_passwd - get a password for authenticating ourselves with
|
* get_pap_passwd - get a password for authenticating ourselves with
|
* our peer using PAP. Returns 1 on success, 0 if no suitable password
|
* our peer using PAP. Returns 1 on success, 0 if no suitable password
|
* could be found.
|
* could be found.
|
*/
|
*/
|
|
|
static int
|
static int
|
get_pap_passwd(passwd)
|
get_pap_passwd(passwd)
|
char *passwd;
|
char *passwd;
|
{
|
{
|
#if 0
|
#if 0
|
/* XXX PPPConfiguration */
|
/* XXX PPPConfiguration */
|
GlobalSystemStatus *stat;
|
GlobalSystemStatus *stat;
|
stat=LockSTBSystemParam();
|
stat=LockSTBSystemParam();
|
strncpy(passwd, stat->PPP_Password, MAXSECRETLEN);
|
strncpy(passwd, stat->PPP_Password, MAXSECRETLEN);
|
UnlockSTBSystemParam();
|
UnlockSTBSystemParam();
|
#endif
|
#endif
|
return 1;
|
return 1;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* have_pap_secret - check whether we have a PAP file with any
|
* have_pap_secret - check whether we have a PAP file with any
|
* secrets that we could possibly use for authenticating the peer.
|
* secrets that we could possibly use for authenticating the peer.
|
*/
|
*/
|
static int
|
static int
|
have_pap_secret()
|
have_pap_secret()
|
{
|
{
|
return 1;
|
return 1;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* have_chap_secret - check whether we have a CHAP file with a
|
* have_chap_secret - check whether we have a CHAP file with a
|
* secret that we could possibly use for authenticating `client'
|
* secret that we could possibly use for authenticating `client'
|
* on `server'. Either can be the null string, meaning we don't
|
* on `server'. Either can be the null string, meaning we don't
|
* know the identity yet.
|
* know the identity yet.
|
*/
|
*/
|
static int
|
static int
|
have_chap_secret(client, server, remote)
|
have_chap_secret(client, server, remote)
|
char *client;
|
char *client;
|
char *server;
|
char *server;
|
u_int32_t remote;
|
u_int32_t remote;
|
{
|
{
|
|
|
return 1;
|
return 1;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* get_secret - open the CHAP secret file and return the secret
|
* get_secret - open the CHAP secret file and return the secret
|
* for authenticating the given client on the given server.
|
* for authenticating the given client on the given server.
|
* (We could be either client or server).
|
* (We could be either client or server).
|
*/
|
*/
|
int
|
int
|
get_secret(unit, client, server, secret, secret_len, save_addrs)
|
get_secret(unit, client, server, secret, secret_len, save_addrs)
|
int unit;
|
int unit;
|
char *client;
|
char *client;
|
char *server;
|
char *server;
|
char *secret;
|
char *secret;
|
int *secret_len;
|
int *secret_len;
|
int save_addrs;
|
int save_addrs;
|
{
|
{
|
#if 0
|
#if 0
|
/* XXX PPPConfiguration */
|
/* XXX PPPConfiguration */
|
int len;
|
int len;
|
GlobalSystemStatus *stat;
|
GlobalSystemStatus *stat;
|
stat=LockSTBSystemParam();
|
stat=LockSTBSystemParam();
|
len=strlen(stat->PPP_Password);
|
len=strlen(stat->PPP_Password);
|
strcpy( secret,stat->PPP_Password);
|
strcpy( secret,stat->PPP_Password);
|
UnlockSTBSystemParam();
|
UnlockSTBSystemParam();
|
|
|
*secret_len = len;
|
*secret_len = len;
|
#endif
|
#endif
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/*
|
/*
|
* set_allowed_addrs() - set the list of allowed addresses.
|
* set_allowed_addrs() - set the list of allowed addresses.
|
*/
|
*/
|
static void
|
static void
|
set_allowed_addrs(unit, addrs)
|
set_allowed_addrs(unit, addrs)
|
int unit;
|
int unit;
|
struct wordlist *addrs;
|
struct wordlist *addrs;
|
{
|
{
|
|
|
}
|
}
|
|
|
/*
|
/*
|
* auth_ip_addr - check whether the peer is authorized to use
|
* auth_ip_addr - check whether the peer is authorized to use
|
* a given IP address. Returns 1 if authorized, 0 otherwise.
|
* a given IP address. Returns 1 if authorized, 0 otherwise.
|
*/
|
*/
|
int
|
int
|
auth_ip_addr(unit, addr)
|
auth_ip_addr(unit, addr)
|
int unit;
|
int unit;
|
u_int32_t addr;
|
u_int32_t addr;
|
{
|
{
|
return ip_addr_check(addr, addresses[unit]);
|
return ip_addr_check(addr, addresses[unit]);
|
}
|
}
|
|
|
static int
|
static int
|
ip_addr_check(addr, addrs)
|
ip_addr_check(addr, addrs)
|
u_int32_t addr;
|
u_int32_t addr;
|
struct wordlist *addrs;
|
struct wordlist *addrs;
|
{
|
{
|
#if 0
|
#if 0
|
u_int32_t a, mask, ah;
|
u_int32_t a, mask, ah;
|
int accept;
|
int accept;
|
char *ptr_word, *ptr_mask;
|
char *ptr_word, *ptr_mask;
|
struct hostent *hp;
|
struct hostent *hp;
|
struct netent *np;
|
struct netent *np;
|
#endif
|
#endif
|
|
|
/* don't allow loopback or multicast address */
|
/* don't allow loopback or multicast address */
|
if (bad_ip_adrs(addr))
|
if (bad_ip_adrs(addr))
|
return 0;
|
return 0;
|
|
|
if (addrs == NULL)
|
if (addrs == NULL)
|
return !auth_required; /* no addresses authorized */
|
return !auth_required; /* no addresses authorized */
|
|
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/*
|
/*
|
* bad_ip_adrs - return 1 if the IP address is one we don't want
|
* 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.
|
* to use, such as an address in the loopback net or a multicast address.
|
* addr is in network byte order.
|
* addr is in network byte order.
|
*/
|
*/
|
int
|
int
|
bad_ip_adrs(addr)
|
bad_ip_adrs(addr)
|
u_int32_t addr;
|
u_int32_t addr;
|
{
|
{
|
addr = ntohl(addr);
|
addr = ntohl(addr);
|
return (addr >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET
|
return (addr >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET
|
|| IN_MULTICAST(addr) || IN_BADCLASS(addr);
|
|| IN_MULTICAST(addr) || IN_BADCLASS(addr);
|
}
|
}
|
|
|
/*
|
/*
|
* check_access - complain if a secret file has too-liberal permissions.
|
* check_access - complain if a secret file has too-liberal permissions.
|
*/
|
*/
|
void
|
void
|
check_access(f, filename)
|
check_access(f, filename)
|
FILE *f;
|
FILE *f;
|
char *filename;
|
char *filename;
|
{
|
{
|
|
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* scan_authfile - Scan an authorization file for a secret suitable
|
* scan_authfile - Scan an authorization file for a secret suitable
|
* for authenticating `client' on `server'. The return value is -1
|
* for authenticating `client' on `server'. The return value is -1
|
* if no secret is found, otherwise >= 0. The return value has
|
* if no secret is found, otherwise >= 0. The return value has
|
* NONWILD_CLIENT set if the secret didn't have "*" for the client, and
|
* NONWILD_CLIENT set if the secret didn't have "*" for the client, and
|
* NONWILD_SERVER set if the secret didn't have "*" for the server.
|
* NONWILD_SERVER set if the secret didn't have "*" for the server.
|
* Any following words on the line (i.e. address authorization
|
* Any following words on the line (i.e. address authorization
|
* info) are placed in a wordlist and returned in *addrs.
|
* info) are placed in a wordlist and returned in *addrs.
|
*/
|
*/
|
static int
|
static int
|
scan_authfile(f, client, server, ipaddr, secret, addrs, filename)
|
scan_authfile(f, client, server, ipaddr, secret, addrs, filename)
|
FILE *f;
|
FILE *f;
|
char *client;
|
char *client;
|
char *server;
|
char *server;
|
u_int32_t ipaddr;
|
u_int32_t ipaddr;
|
char *secret;
|
char *secret;
|
struct wordlist **addrs;
|
struct wordlist **addrs;
|
char *filename;
|
char *filename;
|
{
|
{
|
|
|
return -1;
|
return -1;
|
}
|
}
|
|
|
/*
|
/*
|
* free_wordlist - release memory allocated for a wordlist.
|
* free_wordlist - release memory allocated for a wordlist.
|
*/
|
*/
|
static void
|
static void
|
free_wordlist(wp)
|
free_wordlist(wp)
|
struct wordlist *wp;
|
struct wordlist *wp;
|
{
|
{
|
struct wordlist *next;
|
struct wordlist *next;
|
|
|
while (wp != NULL) {
|
while (wp != NULL) {
|
next = wp->next;
|
next = wp->next;
|
free(wp);
|
free(wp);
|
wp = next;
|
wp = next;
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* auth_script - execute a script with arguments
|
* auth_script - execute a script with arguments
|
* interface-name peer-name real-user tty speed
|
* interface-name peer-name real-user tty speed
|
*/
|
*/
|
static void
|
static void
|
auth_script(script)
|
auth_script(script)
|
char *script;
|
char *script;
|
{
|
{
|
}
|
}
|
|
|
