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lwip/netif/ppp/auth.c@0:632c9925f013, 2010-06-11 (annotated)

Committer:: donatien
Date:: Fri Jun 11 16:05:15 2010 +0000
Revision:: 0:632c9925f013
Child:: 4:fd826cad83c0

Who changed what in which revision?

User	Revision	Line number	New contents of line
donatien	0:632c9925f013	1	/*****************************************************************************
donatien	0:632c9925f013	2	* auth.c - Network Authentication and Phase Control program file.
donatien	0:632c9925f013	3	*
donatien	0:632c9925f013	4	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
donatien	0:632c9925f013	5	* Copyright (c) 1997 by Global Election Systems Inc. All rights reserved.
donatien	0:632c9925f013	6	*
donatien	0:632c9925f013	7	* The authors hereby grant permission to use, copy, modify, distribute,
donatien	0:632c9925f013	8	* and license this software and its documentation for any purpose, provided
donatien	0:632c9925f013	9	* that existing copyright notices are retained in all copies and that this
donatien	0:632c9925f013	10	* notice and the following disclaimer are included verbatim in any
donatien	0:632c9925f013	11	* distributions. No written agreement, license, or royalty fee is required
donatien	0:632c9925f013	12	* for any of the authorized uses.
donatien	0:632c9925f013	13	*
donatien	0:632c9925f013	14	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
donatien	0:632c9925f013	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
donatien	0:632c9925f013	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
donatien	0:632c9925f013	17	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
donatien	0:632c9925f013	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
donatien	0:632c9925f013	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
donatien	0:632c9925f013	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
donatien	0:632c9925f013	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
donatien	0:632c9925f013	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
donatien	0:632c9925f013	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
donatien	0:632c9925f013	24	*
donatien	0:632c9925f013	25	******************************************************************************
donatien	0:632c9925f013	26	* REVISION HISTORY
donatien	0:632c9925f013	27	*
donatien	0:632c9925f013	28	* 03-01-01 Marc Boucher <marc@mbsi.ca>
donatien	0:632c9925f013	29	* Ported to lwIP.
donatien	0:632c9925f013	30	* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
donatien	0:632c9925f013	31	* Ported from public pppd code.
donatien	0:632c9925f013	32	*****************************************************************************/
donatien	0:632c9925f013	33	/*
donatien	0:632c9925f013	34	* auth.c - PPP authentication and phase control.
donatien	0:632c9925f013	35	*
donatien	0:632c9925f013	36	* Copyright (c) 1993 The Australian National University.
donatien	0:632c9925f013	37	* All rights reserved.
donatien	0:632c9925f013	38	*
donatien	0:632c9925f013	39	* Redistribution and use in source and binary forms are permitted
donatien	0:632c9925f013	40	* provided that the above copyright notice and this paragraph are
donatien	0:632c9925f013	41	* duplicated in all such forms and that any documentation,
donatien	0:632c9925f013	42	* advertising materials, and other materials related to such
donatien	0:632c9925f013	43	* distribution and use acknowledge that the software was developed
donatien	0:632c9925f013	44	* by the Australian National University. The name of the University
donatien	0:632c9925f013	45	* may not be used to endorse or promote products derived from this
donatien	0:632c9925f013	46	* software without specific prior written permission.
donatien	0:632c9925f013	47	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
donatien	0:632c9925f013	48	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
donatien	0:632c9925f013	49	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
donatien	0:632c9925f013	50	*
donatien	0:632c9925f013	51	* Copyright (c) 1989 Carnegie Mellon University.
donatien	0:632c9925f013	52	* All rights reserved.
donatien	0:632c9925f013	53	*
donatien	0:632c9925f013	54	* Redistribution and use in source and binary forms are permitted
donatien	0:632c9925f013	55	* provided that the above copyright notice and this paragraph are
donatien	0:632c9925f013	56	* duplicated in all such forms and that any documentation,
donatien	0:632c9925f013	57	* advertising materials, and other materials related to such
donatien	0:632c9925f013	58	* distribution and use acknowledge that the software was developed
donatien	0:632c9925f013	59	* by Carnegie Mellon University. The name of the
donatien	0:632c9925f013	60	* University may not be used to endorse or promote products derived
donatien	0:632c9925f013	61	* from this software without specific prior written permission.
donatien	0:632c9925f013	62	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
donatien	0:632c9925f013	63	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
donatien	0:632c9925f013	64	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
donatien	0:632c9925f013	65	*/
donatien	0:632c9925f013	66
donatien	0:632c9925f013	67	#include "lwip/opt.h"
donatien	0:632c9925f013	68
donatien	0:632c9925f013	69	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
donatien	0:632c9925f013	70
donatien	0:632c9925f013	71	#include "ppp.h"
donatien	0:632c9925f013	72	#include "pppdebug.h"
donatien	0:632c9925f013	73
donatien	0:632c9925f013	74	#include "fsm.h"
donatien	0:632c9925f013	75	#include "lcp.h"
donatien	0:632c9925f013	76	#include "pap.h"
donatien	0:632c9925f013	77	#include "chap.h"
donatien	0:632c9925f013	78	#include "auth.h"
donatien	0:632c9925f013	79	#include "ipcp.h"
donatien	0:632c9925f013	80
donatien	0:632c9925f013	81	#if CBCP_SUPPORT
donatien	0:632c9925f013	82	#include "cbcp.h"
donatien	0:632c9925f013	83	#endif /* CBCP_SUPPORT */
donatien	0:632c9925f013	84
donatien	0:632c9925f013	85	#include "lwip/inet.h"
donatien	0:632c9925f013	86
donatien	0:632c9925f013	87	#include <string.h>
donatien	0:632c9925f013	88
donatien	0:632c9925f013	89	#if 0 /* UNUSED */
donatien	0:632c9925f013	90	/* Bits in scan_authfile return value */
donatien	0:632c9925f013	91	#define NONWILD_SERVER 1
donatien	0:632c9925f013	92	#define NONWILD_CLIENT 2
donatien	0:632c9925f013	93
donatien	0:632c9925f013	94	#define ISWILD(word) (word[0] == '*' && word[1] == 0)
donatien	0:632c9925f013	95	#endif /* UNUSED */
donatien	0:632c9925f013	96
donatien	0:632c9925f013	97	#if PAP_SUPPORT \|\| CHAP_SUPPORT
donatien	0:632c9925f013	98	/* The name by which the peer authenticated itself to us. */
donatien	0:632c9925f013	99	static char peer_authname[MAXNAMELEN];
donatien	0:632c9925f013	100	#endif /* PAP_SUPPORT \|\| CHAP_SUPPORT */
donatien	0:632c9925f013	101
donatien	0:632c9925f013	102	/* Records which authentication operations haven't completed yet. */
donatien	0:632c9925f013	103	static int auth_pending[NUM_PPP];
donatien	0:632c9925f013	104
donatien	0:632c9925f013	105	/* Set if we have successfully called plogin() */
donatien	0:632c9925f013	106	static int logged_in;
donatien	0:632c9925f013	107
donatien	0:632c9925f013	108	/* Set if we have run the /etc/ppp/auth-up script. */
donatien	0:632c9925f013	109	static int did_authup; /* @todo, we don't need this in lwip*/
donatien	0:632c9925f013	110
donatien	0:632c9925f013	111	/* List of addresses which the peer may use. */
donatien	0:632c9925f013	112	static struct wordlist *addresses[NUM_PPP];
donatien	0:632c9925f013	113
donatien	0:632c9925f013	114	#if 0 /* UNUSED */
donatien	0:632c9925f013	115	/* Wordlist giving addresses which the peer may use
donatien	0:632c9925f013	116	without authenticating itself. */
donatien	0:632c9925f013	117	static struct wordlist *noauth_addrs;
donatien	0:632c9925f013	118
donatien	0:632c9925f013	119	/* Extra options to apply, from the secrets file entry for the peer. */
donatien	0:632c9925f013	120	static struct wordlist *extra_options;
donatien	0:632c9925f013	121	#endif /* UNUSED */
donatien	0:632c9925f013	122
donatien	0:632c9925f013	123	/* Number of network protocols which we have opened. */
donatien	0:632c9925f013	124	static int num_np_open;
donatien	0:632c9925f013	125
donatien	0:632c9925f013	126	/* Number of network protocols which have come up. */
donatien	0:632c9925f013	127	static int num_np_up;
donatien	0:632c9925f013	128
donatien	0:632c9925f013	129	#if PAP_SUPPORT \|\| CHAP_SUPPORT
donatien	0:632c9925f013	130	/* Set if we got the contents of passwd[] from the pap-secrets file. */
donatien	0:632c9925f013	131	static int passwd_from_file;
donatien	0:632c9925f013	132	#endif /* PAP_SUPPORT \|\| CHAP_SUPPORT */
donatien	0:632c9925f013	133
donatien	0:632c9925f013	134	#if 0 /* UNUSED */
donatien	0:632c9925f013	135	/* Set if we require authentication only because we have a default route. */
donatien	0:632c9925f013	136	static bool default_auth;
donatien	0:632c9925f013	137
donatien	0:632c9925f013	138	/* Hook to enable a plugin to control the idle time limit */
donatien	0:632c9925f013	139	int (idle_time_hook) __P((struct ppp_idle )) = NULL;
donatien	0:632c9925f013	140
donatien	0:632c9925f013	141	/* Hook for a plugin to say whether we can possibly authenticate any peer */
donatien	0:632c9925f013	142	int (*pap_check_hook) __P((void)) = NULL;
donatien	0:632c9925f013	143
donatien	0:632c9925f013	144	/* Hook for a plugin to check the PAP user and password */
donatien	0:632c9925f013	145	int (pap_auth_hook) __P((char user, char passwd, char *msgp,
donatien	0:632c9925f013	146	struct wordlist **paddrs,
donatien	0:632c9925f013	147	struct wordlist **popts)) = NULL;
donatien	0:632c9925f013	148
donatien	0:632c9925f013	149	/* Hook for a plugin to know about the PAP user logout */
donatien	0:632c9925f013	150	void (*pap_logout_hook) __P((void)) = NULL;
donatien	0:632c9925f013	151
donatien	0:632c9925f013	152	/* Hook for a plugin to get the PAP password for authenticating us */
donatien	0:632c9925f013	153	int (pap_passwd_hook) __P((char user, char *passwd)) = NULL;
donatien	0:632c9925f013	154
donatien	0:632c9925f013	155	/*
donatien	0:632c9925f013	156	* This is used to ensure that we don't start an auth-up/down
donatien	0:632c9925f013	157	* script while one is already running.
donatien	0:632c9925f013	158	*/
donatien	0:632c9925f013	159	enum script_state {
donatien	0:632c9925f013	160	s_down,
donatien	0:632c9925f013	161	s_up
donatien	0:632c9925f013	162	};
donatien	0:632c9925f013	163
donatien	0:632c9925f013	164	static enum script_state auth_state = s_down;
donatien	0:632c9925f013	165	static enum script_state auth_script_state = s_down;
donatien	0:632c9925f013	166	static pid_t auth_script_pid = 0;
donatien	0:632c9925f013	167
donatien	0:632c9925f013	168	/*
donatien	0:632c9925f013	169	* Option variables.
donatien	0:632c9925f013	170	* lwip: some of these are present in the ppp_settings structure
donatien	0:632c9925f013	171	*/
donatien	0:632c9925f013	172	bool uselogin = 0; /* Use /etc/passwd for checking PAP */
donatien	0:632c9925f013	173	bool cryptpap = 0; /* Passwords in pap-secrets are encrypted */
donatien	0:632c9925f013	174	bool refuse_pap = 0; /* Don't wanna auth. ourselves with PAP */
donatien	0:632c9925f013	175	bool refuse_chap = 0; /* Don't wanna auth. ourselves with CHAP */
donatien	0:632c9925f013	176	bool usehostname = 0; /* Use hostname for our_name */
donatien	0:632c9925f013	177	bool auth_required = 0; /* Always require authentication from peer */
donatien	0:632c9925f013	178	bool allow_any_ip = 0; /* Allow peer to use any IP address */
donatien	0:632c9925f013	179	bool explicit_remote = 0; /* User specified explicit remote name */
donatien	0:632c9925f013	180	char remote_name[MAXNAMELEN]; /* Peer's name for authentication */
donatien	0:632c9925f013	181
donatien	0:632c9925f013	182	#endif /* UNUSED */
donatien	0:632c9925f013	183
donatien	0:632c9925f013	184	/* Bits in auth_pending[] */
donatien	0:632c9925f013	185	#define PAP_WITHPEER 1
donatien	0:632c9925f013	186	#define PAP_PEER 2
donatien	0:632c9925f013	187	#define CHAP_WITHPEER 4
donatien	0:632c9925f013	188	#define CHAP_PEER 8
donatien	0:632c9925f013	189
donatien	0:632c9925f013	190	/* @todo, move this somewhere */
donatien	0:632c9925f013	191	/* Used for storing a sequence of words. Usually malloced. */
donatien	0:632c9925f013	192	struct wordlist {
donatien	0:632c9925f013	193	struct wordlist *next;
donatien	0:632c9925f013	194	char word[1];
donatien	0:632c9925f013	195	};
donatien	0:632c9925f013	196
donatien	0:632c9925f013	197
donatien	0:632c9925f013	198	extern char crypt (const char , const char *);
donatien	0:632c9925f013	199
donatien	0:632c9925f013	200	/* Prototypes for procedures local to this file. */
donatien	0:632c9925f013	201
donatien	0:632c9925f013	202	static void network_phase (int);
donatien	0:632c9925f013	203	static void check_idle (void *);
donatien	0:632c9925f013	204	static void connect_time_expired (void *);
donatien	0:632c9925f013	205	#if 0
donatien	0:632c9925f013	206	static int plogin (char , char , char *, int );
donatien	0:632c9925f013	207	#endif
donatien	0:632c9925f013	208	static void plogout (void);
donatien	0:632c9925f013	209	static int null_login (int);
donatien	0:632c9925f013	210	static int get_pap_passwd (int, char , char );
donatien	0:632c9925f013	211	static int have_pap_secret (void);
donatien	0:632c9925f013	212	static int have_chap_secret (char , char , u32_t);
donatien	0:632c9925f013	213	static int ip_addr_check (u32_t, struct wordlist *);
donatien	0:632c9925f013	214
donatien	0:632c9925f013	215	#if 0 /* PAP_SUPPORT \|\| CHAP_SUPPORT */
donatien	0:632c9925f013	216	static int scan_authfile (FILE , char , char , char ,
donatien	0:632c9925f013	217	struct wordlist , struct wordlist ,
donatien	0:632c9925f013	218	char *);
donatien	0:632c9925f013	219	static void free_wordlist (struct wordlist *);
donatien	0:632c9925f013	220	static void auth_script (char *);
donatien	0:632c9925f013	221	static void auth_script_done (void *);
donatien	0:632c9925f013	222	static void set_allowed_addrs (int unit, struct wordlist *addrs);
donatien	0:632c9925f013	223	static int some_ip_ok (struct wordlist *);
donatien	0:632c9925f013	224	static int setupapfile (char **);
donatien	0:632c9925f013	225	static int privgroup (char **);
donatien	0:632c9925f013	226	static int set_noauth_addr (char **);
donatien	0:632c9925f013	227	static void check_access (FILE , char );
donatien	0:632c9925f013	228	#endif /* 0 / / PAP_SUPPORT \|\| CHAP_SUPPORT */
donatien	0:632c9925f013	229
donatien	0:632c9925f013	230	#if 0 /* UNUSED */
donatien	0:632c9925f013	231	/*
donatien	0:632c9925f013	232	* Authentication-related options.
donatien	0:632c9925f013	233	*/
donatien	0:632c9925f013	234	option_t auth_options[] = {
donatien	0:632c9925f013	235	{ "require-pap", o_bool, &lcp_wantoptions[0].neg_upap,
donatien	0:632c9925f013	236	"Require PAP authentication from peer", 1, &auth_required },
donatien	0:632c9925f013	237	{ "+pap", o_bool, &lcp_wantoptions[0].neg_upap,
donatien	0:632c9925f013	238	"Require PAP authentication from peer", 1, &auth_required },
donatien	0:632c9925f013	239	{ "refuse-pap", o_bool, &refuse_pap,
donatien	0:632c9925f013	240	"Don't agree to auth to peer with PAP", 1 },
donatien	0:632c9925f013	241	{ "-pap", o_bool, &refuse_pap,
donatien	0:632c9925f013	242	"Don't allow PAP authentication with peer", 1 },
donatien	0:632c9925f013	243	{ "require-chap", o_bool, &lcp_wantoptions[0].neg_chap,
donatien	0:632c9925f013	244	"Require CHAP authentication from peer", 1, &auth_required },
donatien	0:632c9925f013	245	{ "+chap", o_bool, &lcp_wantoptions[0].neg_chap,
donatien	0:632c9925f013	246	"Require CHAP authentication from peer", 1, &auth_required },
donatien	0:632c9925f013	247	{ "refuse-chap", o_bool, &refuse_chap,
donatien	0:632c9925f013	248	"Don't agree to auth to peer with CHAP", 1 },
donatien	0:632c9925f013	249	{ "-chap", o_bool, &refuse_chap,
donatien	0:632c9925f013	250	"Don't allow CHAP authentication with peer", 1 },
donatien	0:632c9925f013	251	{ "name", o_string, our_name,
donatien	0:632c9925f013	252	"Set local name for authentication",
donatien	0:632c9925f013	253	OPT_PRIV\|OPT_STATIC, NULL, MAXNAMELEN },
donatien	0:632c9925f013	254	{ "user", o_string, user,
donatien	0:632c9925f013	255	"Set name for auth with peer", OPT_STATIC, NULL, MAXNAMELEN },
donatien	0:632c9925f013	256	{ "usehostname", o_bool, &usehostname,
donatien	0:632c9925f013	257	"Must use hostname for authentication", 1 },
donatien	0:632c9925f013	258	{ "remotename", o_string, remote_name,
donatien	0:632c9925f013	259	"Set remote name for authentication", OPT_STATIC,
donatien	0:632c9925f013	260	&explicit_remote, MAXNAMELEN },
donatien	0:632c9925f013	261	{ "auth", o_bool, &auth_required,
donatien	0:632c9925f013	262	"Require authentication from peer", 1 },
donatien	0:632c9925f013	263	{ "noauth", o_bool, &auth_required,
donatien	0:632c9925f013	264	"Don't require peer to authenticate", OPT_PRIV, &allow_any_ip },
donatien	0:632c9925f013	265	{ "login", o_bool, &uselogin,
donatien	0:632c9925f013	266	"Use system password database for PAP", 1 },
donatien	0:632c9925f013	267	{ "papcrypt", o_bool, &cryptpap,
donatien	0:632c9925f013	268	"PAP passwords are encrypted", 1 },
donatien	0:632c9925f013	269	{ "+ua", o_special, (void *)setupapfile,
donatien	0:632c9925f013	270	"Get PAP user and password from file" },
donatien	0:632c9925f013	271	{ "password", o_string, passwd,
donatien	0:632c9925f013	272	"Password for authenticating us to the peer", OPT_STATIC,
donatien	0:632c9925f013	273	NULL, MAXSECRETLEN },
donatien	0:632c9925f013	274	{ "privgroup", o_special, (void *)privgroup,
donatien	0:632c9925f013	275	"Allow group members to use privileged options", OPT_PRIV },
donatien	0:632c9925f013	276	{ "allow-ip", o_special, (void *)set_noauth_addr,
donatien	0:632c9925f013	277	"Set IP address(es) which can be used without authentication",
donatien	0:632c9925f013	278	OPT_PRIV },
donatien	0:632c9925f013	279	{ NULL }
donatien	0:632c9925f013	280	};
donatien	0:632c9925f013	281	#endif /* UNUSED */
donatien	0:632c9925f013	282	#if 0 /* UNUSED */
donatien	0:632c9925f013	283	/*
donatien	0:632c9925f013	284	* setupapfile - specifies UPAP info for authenticating with peer.
donatien	0:632c9925f013	285	*/
donatien	0:632c9925f013	286	static int
donatien	0:632c9925f013	287	setupapfile(char **argv)
donatien	0:632c9925f013	288	{
donatien	0:632c9925f013	289	FILE * ufile;
donatien	0:632c9925f013	290	int l;
donatien	0:632c9925f013	291
donatien	0:632c9925f013	292	lcp_allowoptions[0].neg_upap = 1;
donatien	0:632c9925f013	293
donatien	0:632c9925f013	294	/* open user info file */
donatien	0:632c9925f013	295	seteuid(getuid());
donatien	0:632c9925f013	296	ufile = fopen(*argv, "r");
donatien	0:632c9925f013	297	seteuid(0);
donatien	0:632c9925f013	298	if (ufile == NULL) {
donatien	0:632c9925f013	299	option_error("unable to open user login data file %s", *argv);
donatien	0:632c9925f013	300	return 0;
donatien	0:632c9925f013	301	}
donatien	0:632c9925f013	302	check_access(ufile, *argv);
donatien	0:632c9925f013	303
donatien	0:632c9925f013	304	/* get username */
donatien	0:632c9925f013	305	if (fgets(user, MAXNAMELEN - 1, ufile) == NULL
donatien	0:632c9925f013	306	\|\| fgets(passwd, MAXSECRETLEN - 1, ufile) == NULL){
donatien	0:632c9925f013	307	option_error("unable to read user login data file %s", *argv);
donatien	0:632c9925f013	308	return 0;
donatien	0:632c9925f013	309	}
donatien	0:632c9925f013	310	fclose(ufile);
donatien	0:632c9925f013	311
donatien	0:632c9925f013	312	/* get rid of newlines */
donatien	0:632c9925f013	313	l = strlen(user);
donatien	0:632c9925f013	314	if (l > 0 && user[l-1] == '\n')
donatien	0:632c9925f013	315	user[l-1] = 0;
donatien	0:632c9925f013	316	l = strlen(passwd);
donatien	0:632c9925f013	317	if (l > 0 && passwd[l-1] == '\n')
donatien	0:632c9925f013	318	passwd[l-1] = 0;
donatien	0:632c9925f013	319
donatien	0:632c9925f013	320	return (1);
donatien	0:632c9925f013	321	}
donatien	0:632c9925f013	322	#endif /* UNUSED */
donatien	0:632c9925f013	323
donatien	0:632c9925f013	324	#if 0 /* UNUSED */
donatien	0:632c9925f013	325	/*
donatien	0:632c9925f013	326	* privgroup - allow members of the group to have privileged access.
donatien	0:632c9925f013	327	*/
donatien	0:632c9925f013	328	static int
donatien	0:632c9925f013	329	privgroup(char **argv)
donatien	0:632c9925f013	330	{
donatien	0:632c9925f013	331	struct group *g;
donatien	0:632c9925f013	332	int i;
donatien	0:632c9925f013	333
donatien	0:632c9925f013	334	g = getgrnam(*argv);
donatien	0:632c9925f013	335	if (g == 0) {
donatien	0:632c9925f013	336	option_error("group %s is unknown", *argv);
donatien	0:632c9925f013	337	return 0;
donatien	0:632c9925f013	338	}
donatien	0:632c9925f013	339	for (i = 0; i < ngroups; ++i) {
donatien	0:632c9925f013	340	if (groups[i] == g->gr_gid) {
donatien	0:632c9925f013	341	privileged = 1;
donatien	0:632c9925f013	342	break;
donatien	0:632c9925f013	343	}
donatien	0:632c9925f013	344	}
donatien	0:632c9925f013	345	return 1;
donatien	0:632c9925f013	346	}
donatien	0:632c9925f013	347	#endif
donatien	0:632c9925f013	348
donatien	0:632c9925f013	349	#if 0 /* UNUSED */
donatien	0:632c9925f013	350	/*
donatien	0:632c9925f013	351	* set_noauth_addr - set address(es) that can be used without authentication.
donatien	0:632c9925f013	352	* Equivalent to specifying an entry like `"" * "" addr' in pap-secrets.
donatien	0:632c9925f013	353	*/
donatien	0:632c9925f013	354	static int
donatien	0:632c9925f013	355	set_noauth_addr(char **argv)
donatien	0:632c9925f013	356	{
donatien	0:632c9925f013	357	char addr = argv;
donatien	0:632c9925f013	358	int l = strlen(addr);
donatien	0:632c9925f013	359	struct wordlist *wp;
donatien	0:632c9925f013	360
donatien	0:632c9925f013	361	wp = (struct wordlist *) malloc(sizeof(struct wordlist) + l + 1);
donatien	0:632c9925f013	362	if (wp == NULL)
donatien	0:632c9925f013	363	novm("allow-ip argument");
donatien	0:632c9925f013	364	wp->word = (char *) (wp + 1);
donatien	0:632c9925f013	365	wp->next = noauth_addrs;
donatien	0:632c9925f013	366	BCOPY(addr, wp->word, l);
donatien	0:632c9925f013	367	noauth_addrs = wp;
donatien	0:632c9925f013	368	return 1;
donatien	0:632c9925f013	369	}
donatien	0:632c9925f013	370	#endif /* UNUSED */
donatien	0:632c9925f013	371
donatien	0:632c9925f013	372	/*
donatien	0:632c9925f013	373	* An Open on LCP has requested a change from Dead to Establish phase.
donatien	0:632c9925f013	374	* Do what's necessary to bring the physical layer up.
donatien	0:632c9925f013	375	*/
donatien	0:632c9925f013	376	void
donatien	0:632c9925f013	377	link_required(int unit)
donatien	0:632c9925f013	378	{
donatien	0:632c9925f013	379	LWIP_UNUSED_ARG(unit);
donatien	0:632c9925f013	380
donatien	0:632c9925f013	381	AUTHDEBUG(LOG_INFO, ("link_required: %d\n", unit));
donatien	0:632c9925f013	382	}
donatien	0:632c9925f013	383
donatien	0:632c9925f013	384	/*
donatien	0:632c9925f013	385	* LCP has terminated the link; go to the Dead phase and take the
donatien	0:632c9925f013	386	* physical layer down.
donatien	0:632c9925f013	387	*/
donatien	0:632c9925f013	388	void
donatien	0:632c9925f013	389	link_terminated(int unit)
donatien	0:632c9925f013	390	{
donatien	0:632c9925f013	391	AUTHDEBUG(LOG_INFO, ("link_terminated: %d\n", unit));
donatien	0:632c9925f013	392	if (lcp_phase[unit] == PHASE_DEAD) {
donatien	0:632c9925f013	393	return;
donatien	0:632c9925f013	394	}
donatien	0:632c9925f013	395	if (logged_in) {
donatien	0:632c9925f013	396	plogout();
donatien	0:632c9925f013	397	}
donatien	0:632c9925f013	398	lcp_phase[unit] = PHASE_DEAD;
donatien	0:632c9925f013	399	AUTHDEBUG(LOG_NOTICE, ("Connection terminated.\n"));
donatien	0:632c9925f013	400	pppLinkTerminated(unit);
donatien	0:632c9925f013	401	}
donatien	0:632c9925f013	402
donatien	0:632c9925f013	403	/*
donatien	0:632c9925f013	404	* LCP has gone down; it will either die or try to re-establish.
donatien	0:632c9925f013	405	*/
donatien	0:632c9925f013	406	void
donatien	0:632c9925f013	407	link_down(int unit)
donatien	0:632c9925f013	408	{
donatien	0:632c9925f013	409	int i;
donatien	0:632c9925f013	410	struct protent *protp;
donatien	0:632c9925f013	411
donatien	0:632c9925f013	412	AUTHDEBUG(LOG_INFO, ("link_down: %d\n", unit));
donatien	0:632c9925f013	413
donatien	0:632c9925f013	414	if (did_authup) {
donatien	0:632c9925f013	415	/* XXX Do link down processing. */
donatien	0:632c9925f013	416	did_authup = 0;
donatien	0:632c9925f013	417	}
donatien	0:632c9925f013	418	for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
donatien	0:632c9925f013	419	if (!protp->enabled_flag) {
donatien	0:632c9925f013	420	continue;
donatien	0:632c9925f013	421	}
donatien	0:632c9925f013	422	if (protp->protocol != PPP_LCP && protp->lowerdown != NULL) {
donatien	0:632c9925f013	423	(*protp->lowerdown)(unit);
donatien	0:632c9925f013	424	}
donatien	0:632c9925f013	425	if (protp->protocol < 0xC000 && protp->close != NULL) {
donatien	0:632c9925f013	426	(*protp->close)(unit, "LCP down");
donatien	0:632c9925f013	427	}
donatien	0:632c9925f013	428	}
donatien	0:632c9925f013	429	num_np_open = 0; /* number of network protocols we have opened */
donatien	0:632c9925f013	430	num_np_up = 0; /* Number of network protocols which have come up */
donatien	0:632c9925f013	431
donatien	0:632c9925f013	432	if (lcp_phase[unit] != PHASE_DEAD) {
donatien	0:632c9925f013	433	lcp_phase[unit] = PHASE_TERMINATE;
donatien	0:632c9925f013	434	}
donatien	0:632c9925f013	435	pppLinkDown(unit);
donatien	0:632c9925f013	436	}
donatien	0:632c9925f013	437
donatien	0:632c9925f013	438	/*
donatien	0:632c9925f013	439	* The link is established.
donatien	0:632c9925f013	440	* Proceed to the Dead, Authenticate or Network phase as appropriate.
donatien	0:632c9925f013	441	*/
donatien	0:632c9925f013	442	void
donatien	0:632c9925f013	443	link_established(int unit)
donatien	0:632c9925f013	444	{
donatien	0:632c9925f013	445	int auth;
donatien	0:632c9925f013	446	int i;
donatien	0:632c9925f013	447	struct protent *protp;
donatien	0:632c9925f013	448	lcp_options *wo = &lcp_wantoptions[unit];
donatien	0:632c9925f013	449	lcp_options *go = &lcp_gotoptions[unit];
donatien	0:632c9925f013	450	#if PAP_SUPPORT \|\| CHAP_SUPPORT
donatien	0:632c9925f013	451	lcp_options *ho = &lcp_hisoptions[unit];
donatien	0:632c9925f013	452	#endif /* PAP_SUPPORT \|\| CHAP_SUPPORT */
donatien	0:632c9925f013	453
donatien	0:632c9925f013	454	AUTHDEBUG(LOG_INFO, ("link_established: unit %d; Lowering up all protocols...\n", unit));
donatien	0:632c9925f013	455	/*
donatien	0:632c9925f013	456	* Tell higher-level protocols that LCP is up.
donatien	0:632c9925f013	457	*/
donatien	0:632c9925f013	458	for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
donatien	0:632c9925f013	459	if (protp->protocol != PPP_LCP && protp->enabled_flag && protp->lowerup != NULL) {
donatien	0:632c9925f013	460	(*protp->lowerup)(unit);
donatien	0:632c9925f013	461	}
donatien	0:632c9925f013	462	}
donatien	0:632c9925f013	463	if (ppp_settings.auth_required && !(go->neg_chap \|\| go->neg_upap)) {
donatien	0:632c9925f013	464	/*
donatien	0:632c9925f013	465	* We wanted the peer to authenticate itself, and it refused:
donatien	0:632c9925f013	466	* treat it as though it authenticated with PAP using a username
donatien	0:632c9925f013	467	* of "" and a password of "". If that's not OK, boot it out.
donatien	0:632c9925f013	468	*/
donatien	0:632c9925f013	469	if (!wo->neg_upap \|\| !null_login(unit)) {
donatien	0:632c9925f013	470	AUTHDEBUG(LOG_WARNING, ("peer refused to authenticate\n"));
donatien	0:632c9925f013	471	lcp_close(unit, "peer refused to authenticate");
donatien	0:632c9925f013	472	return;
donatien	0:632c9925f013	473	}
donatien	0:632c9925f013	474	}
donatien	0:632c9925f013	475
donatien	0:632c9925f013	476	lcp_phase[unit] = PHASE_AUTHENTICATE;
donatien	0:632c9925f013	477	auth = 0;
donatien	0:632c9925f013	478	#if CHAP_SUPPORT
donatien	0:632c9925f013	479	if (go->neg_chap) {
donatien	0:632c9925f013	480	ChapAuthPeer(unit, ppp_settings.our_name, go->chap_mdtype);
donatien	0:632c9925f013	481	auth \|= CHAP_PEER;
donatien	0:632c9925f013	482	}
donatien	0:632c9925f013	483	#endif /* CHAP_SUPPORT */
donatien	0:632c9925f013	484	#if PAP_SUPPORT && CHAP_SUPPORT
donatien	0:632c9925f013	485	else
donatien	0:632c9925f013	486	#endif /* PAP_SUPPORT && CHAP_SUPPORT */
donatien	0:632c9925f013	487	#if PAP_SUPPORT
donatien	0:632c9925f013	488	if (go->neg_upap) {
donatien	0:632c9925f013	489	upap_authpeer(unit);
donatien	0:632c9925f013	490	auth \|= PAP_PEER;
donatien	0:632c9925f013	491	}
donatien	0:632c9925f013	492	#endif /* PAP_SUPPORT */
donatien	0:632c9925f013	493	#if CHAP_SUPPORT
donatien	0:632c9925f013	494	if (ho->neg_chap) {
donatien	0:632c9925f013	495	ChapAuthWithPeer(unit, ppp_settings.user, ho->chap_mdtype);
donatien	0:632c9925f013	496	auth \|= CHAP_WITHPEER;
donatien	0:632c9925f013	497	}
donatien	0:632c9925f013	498	#endif /* CHAP_SUPPORT */
donatien	0:632c9925f013	499	#if PAP_SUPPORT && CHAP_SUPPORT
donatien	0:632c9925f013	500	else
donatien	0:632c9925f013	501	#endif /* PAP_SUPPORT && CHAP_SUPPORT */
donatien	0:632c9925f013	502	#if PAP_SUPPORT
donatien	0:632c9925f013	503	if (ho->neg_upap) {
donatien	0:632c9925f013	504	if (ppp_settings.passwd[0] == 0) {
donatien	0:632c9925f013	505	passwd_from_file = 1;
donatien	0:632c9925f013	506	if (!get_pap_passwd(unit, ppp_settings.user, ppp_settings.passwd)) {
donatien	0:632c9925f013	507	AUTHDEBUG(LOG_ERR, ("No secret found for PAP login\n"));
donatien	0:632c9925f013	508	}
donatien	0:632c9925f013	509	}
donatien	0:632c9925f013	510	upap_authwithpeer(unit, ppp_settings.user, ppp_settings.passwd);
donatien	0:632c9925f013	511	auth \|= PAP_WITHPEER;
donatien	0:632c9925f013	512	}
donatien	0:632c9925f013	513	#endif /* PAP_SUPPORT */
donatien	0:632c9925f013	514	auth_pending[unit] = auth;
donatien	0:632c9925f013	515
donatien	0:632c9925f013	516	if (!auth) {
donatien	0:632c9925f013	517	network_phase(unit);
donatien	0:632c9925f013	518	}
donatien	0:632c9925f013	519	}
donatien	0:632c9925f013	520
donatien	0:632c9925f013	521	/*
donatien	0:632c9925f013	522	* Proceed to the network phase.
donatien	0:632c9925f013	523	*/
donatien	0:632c9925f013	524	static void
donatien	0:632c9925f013	525	network_phase(int unit)
donatien	0:632c9925f013	526	{
donatien	0:632c9925f013	527	int i;
donatien	0:632c9925f013	528	struct protent *protp;
donatien	0:632c9925f013	529	lcp_options *go = &lcp_gotoptions[unit];
donatien	0:632c9925f013	530
donatien	0:632c9925f013	531	/*
donatien	0:632c9925f013	532	* If the peer had to authenticate, run the auth-up script now.
donatien	0:632c9925f013	533	*/
donatien	0:632c9925f013	534	if ((go->neg_chap \|\| go->neg_upap) && !did_authup) {
donatien	0:632c9925f013	535	/* XXX Do setup for peer authentication. */
donatien	0:632c9925f013	536	did_authup = 1;
donatien	0:632c9925f013	537	}
donatien	0:632c9925f013	538
donatien	0:632c9925f013	539	#if CBCP_SUPPORT
donatien	0:632c9925f013	540	/*
donatien	0:632c9925f013	541	* If we negotiated callback, do it now.
donatien	0:632c9925f013	542	*/
donatien	0:632c9925f013	543	if (go->neg_cbcp) {
donatien	0:632c9925f013	544	lcp_phase[unit] = PHASE_CALLBACK;
donatien	0:632c9925f013	545	(*cbcp_protent.open)(unit);
donatien	0:632c9925f013	546	return;
donatien	0:632c9925f013	547	}
donatien	0:632c9925f013	548	#endif /* CBCP_SUPPORT */
donatien	0:632c9925f013	549
donatien	0:632c9925f013	550	lcp_phase[unit] = PHASE_NETWORK;
donatien	0:632c9925f013	551	for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
donatien	0:632c9925f013	552	if (protp->protocol < 0xC000 && protp->enabled_flag && protp->open != NULL) {
donatien	0:632c9925f013	553	(*protp->open)(unit);
donatien	0:632c9925f013	554	if (protp->protocol != PPP_CCP) {
donatien	0:632c9925f013	555	++num_np_open;
donatien	0:632c9925f013	556	}
donatien	0:632c9925f013	557	}
donatien	0:632c9925f013	558	}
donatien	0:632c9925f013	559
donatien	0:632c9925f013	560	if (num_np_open == 0) {
donatien	0:632c9925f013	561	/* nothing to do */
donatien	0:632c9925f013	562	lcp_close(0, "No network protocols running");
donatien	0:632c9925f013	563	}
donatien	0:632c9925f013	564	}
donatien	0:632c9925f013	565	/* @todo: add void start_networks(void) here (pppd 2.3.11) */
donatien	0:632c9925f013	566
donatien	0:632c9925f013	567	/*
donatien	0:632c9925f013	568	* The peer has failed to authenticate himself using `protocol'.
donatien	0:632c9925f013	569	*/
donatien	0:632c9925f013	570	void
donatien	0:632c9925f013	571	auth_peer_fail(int unit, u16_t protocol)
donatien	0:632c9925f013	572	{
donatien	0:632c9925f013	573	LWIP_UNUSED_ARG(protocol);
donatien	0:632c9925f013	574
donatien	0:632c9925f013	575	AUTHDEBUG(LOG_INFO, ("auth_peer_fail: %d proto=%X\n", unit, protocol));
donatien	0:632c9925f013	576	/*
donatien	0:632c9925f013	577	* Authentication failure: take the link down
donatien	0:632c9925f013	578	*/
donatien	0:632c9925f013	579	lcp_close(unit, "Authentication failed");
donatien	0:632c9925f013	580	}
donatien	0:632c9925f013	581
donatien	0:632c9925f013	582
donatien	0:632c9925f013	583	#if PAP_SUPPORT \|\| CHAP_SUPPORT
donatien	0:632c9925f013	584	/*
donatien	0:632c9925f013	585	* The peer has been successfully authenticated using `protocol'.
donatien	0:632c9925f013	586	*/
donatien	0:632c9925f013	587	void
donatien	0:632c9925f013	588	auth_peer_success(int unit, u16_t protocol, char *name, int namelen)
donatien	0:632c9925f013	589	{
donatien	0:632c9925f013	590	int pbit;
donatien	0:632c9925f013	591
donatien	0:632c9925f013	592	AUTHDEBUG(LOG_INFO, ("auth_peer_success: %d proto=%X\n", unit, protocol));
donatien	0:632c9925f013	593	switch (protocol) {
donatien	0:632c9925f013	594	case PPP_CHAP:
donatien	0:632c9925f013	595	pbit = CHAP_PEER;
donatien	0:632c9925f013	596	break;
donatien	0:632c9925f013	597	case PPP_PAP:
donatien	0:632c9925f013	598	pbit = PAP_PEER;
donatien	0:632c9925f013	599	break;
donatien	0:632c9925f013	600	default:
donatien	0:632c9925f013	601	AUTHDEBUG(LOG_WARNING, ("auth_peer_success: unknown protocol %x\n", protocol));
donatien	0:632c9925f013	602	return;
donatien	0:632c9925f013	603	}
donatien	0:632c9925f013	604
donatien	0:632c9925f013	605	/*
donatien	0:632c9925f013	606	* Save the authenticated name of the peer for later.
donatien	0:632c9925f013	607	*/
donatien	0:632c9925f013	608	if (namelen > (int)sizeof(peer_authname) - 1) {
donatien	0:632c9925f013	609	namelen = sizeof(peer_authname) - 1;
donatien	0:632c9925f013	610	}
donatien	0:632c9925f013	611	BCOPY(name, peer_authname, namelen);
donatien	0:632c9925f013	612	peer_authname[namelen] = 0;
donatien	0:632c9925f013	613
donatien	0:632c9925f013	614	/*
donatien	0:632c9925f013	615	* If there is no more authentication still to be done,
donatien	0:632c9925f013	616	* proceed to the network (or callback) phase.
donatien	0:632c9925f013	617	*/
donatien	0:632c9925f013	618	if ((auth_pending[unit] &= ~pbit) == 0) {
donatien	0:632c9925f013	619	network_phase(unit);
donatien	0:632c9925f013	620	}
donatien	0:632c9925f013	621	}
donatien	0:632c9925f013	622
donatien	0:632c9925f013	623	/*
donatien	0:632c9925f013	624	* We have failed to authenticate ourselves to the peer using `protocol'.
donatien	0:632c9925f013	625	*/
donatien	0:632c9925f013	626	void
donatien	0:632c9925f013	627	auth_withpeer_fail(int unit, u16_t protocol)
donatien	0:632c9925f013	628	{
donatien	0:632c9925f013	629	int errCode = PPPERR_AUTHFAIL;
donatien	0:632c9925f013	630
donatien	0:632c9925f013	631	LWIP_UNUSED_ARG(protocol);
donatien	0:632c9925f013	632
donatien	0:632c9925f013	633	AUTHDEBUG(LOG_INFO, ("auth_withpeer_fail: %d proto=%X\n", unit, protocol));
donatien	0:632c9925f013	634	if (passwd_from_file) {
donatien	0:632c9925f013	635	BZERO(ppp_settings.passwd, MAXSECRETLEN);
donatien	0:632c9925f013	636	}
donatien	0:632c9925f013	637	/*
donatien	0:632c9925f013	638	* XXX Warning: the unit number indicates the interface which is
donatien	0:632c9925f013	639	* not necessarily the PPP connection. It works here as long
donatien	0:632c9925f013	640	* as we are only supporting PPP interfaces.
donatien	0:632c9925f013	641	*/
donatien	0:632c9925f013	642	/* @todo: Remove pppIOCtl, it is not used anywhere else.
donatien	0:632c9925f013	643	Instead, directly set errCode. */
donatien	0:632c9925f013	644	pppIOCtl(unit, PPPCTLS_ERRCODE, &errCode);
donatien	0:632c9925f013	645
donatien	0:632c9925f013	646	/*
donatien	0:632c9925f013	647	* We've failed to authenticate ourselves to our peer.
donatien	0:632c9925f013	648	* He'll probably take the link down, and there's not much
donatien	0:632c9925f013	649	* we can do except wait for that.
donatien	0:632c9925f013	650	*/
donatien	0:632c9925f013	651	}
donatien	0:632c9925f013	652
donatien	0:632c9925f013	653	/*
donatien	0:632c9925f013	654	* We have successfully authenticated ourselves with the peer using `protocol'.
donatien	0:632c9925f013	655	*/
donatien	0:632c9925f013	656	void
donatien	0:632c9925f013	657	auth_withpeer_success(int unit, u16_t protocol)
donatien	0:632c9925f013	658	{
donatien	0:632c9925f013	659	int pbit;
donatien	0:632c9925f013	660
donatien	0:632c9925f013	661	AUTHDEBUG(LOG_INFO, ("auth_withpeer_success: %d proto=%X\n", unit, protocol));
donatien	0:632c9925f013	662	switch (protocol) {
donatien	0:632c9925f013	663	case PPP_CHAP:
donatien	0:632c9925f013	664	pbit = CHAP_WITHPEER;
donatien	0:632c9925f013	665	break;
donatien	0:632c9925f013	666	case PPP_PAP:
donatien	0:632c9925f013	667	if (passwd_from_file) {
donatien	0:632c9925f013	668	BZERO(ppp_settings.passwd, MAXSECRETLEN);
donatien	0:632c9925f013	669	}
donatien	0:632c9925f013	670	pbit = PAP_WITHPEER;
donatien	0:632c9925f013	671	break;
donatien	0:632c9925f013	672	default:
donatien	0:632c9925f013	673	AUTHDEBUG(LOG_WARNING, ("auth_peer_success: unknown protocol %x\n", protocol));
donatien	0:632c9925f013	674	pbit = 0;
donatien	0:632c9925f013	675	}
donatien	0:632c9925f013	676
donatien	0:632c9925f013	677	/*
donatien	0:632c9925f013	678	* If there is no more authentication still being done,
donatien	0:632c9925f013	679	* proceed to the network (or callback) phase.
donatien	0:632c9925f013	680	*/
donatien	0:632c9925f013	681	if ((auth_pending[unit] &= ~pbit) == 0) {
donatien	0:632c9925f013	682	network_phase(unit);
donatien	0:632c9925f013	683	}
donatien	0:632c9925f013	684	}
donatien	0:632c9925f013	685	#endif /* PAP_SUPPORT \|\| CHAP_SUPPORT */
donatien	0:632c9925f013	686
donatien	0:632c9925f013	687
donatien	0:632c9925f013	688	/*
donatien	0:632c9925f013	689	* np_up - a network protocol has come up.
donatien	0:632c9925f013	690	*/
donatien	0:632c9925f013	691	void
donatien	0:632c9925f013	692	np_up(int unit, u16_t proto)
donatien	0:632c9925f013	693	{
donatien	0:632c9925f013	694	LWIP_UNUSED_ARG(unit);
donatien	0:632c9925f013	695	LWIP_UNUSED_ARG(proto);
donatien	0:632c9925f013	696
donatien	0:632c9925f013	697	AUTHDEBUG(LOG_INFO, ("np_up: %d proto=%X\n", unit, proto));
donatien	0:632c9925f013	698	if (num_np_up == 0) {
donatien	0:632c9925f013	699	AUTHDEBUG(LOG_INFO, ("np_up: maxconnect=%d idle_time_limit=%d\n",ppp_settings.maxconnect,ppp_settings.idle_time_limit));
donatien	0:632c9925f013	700	/*
donatien	0:632c9925f013	701	* At this point we consider that the link has come up successfully.
donatien	0:632c9925f013	702	*/
donatien	0:632c9925f013	703	if (ppp_settings.idle_time_limit > 0) {
donatien	0:632c9925f013	704	TIMEOUT(check_idle, NULL, ppp_settings.idle_time_limit);
donatien	0:632c9925f013	705	}
donatien	0:632c9925f013	706
donatien	0:632c9925f013	707	/*
donatien	0:632c9925f013	708	* Set a timeout to close the connection once the maximum
donatien	0:632c9925f013	709	* connect time has expired.
donatien	0:632c9925f013	710	*/
donatien	0:632c9925f013	711	if (ppp_settings.maxconnect > 0) {
donatien	0:632c9925f013	712	TIMEOUT(connect_time_expired, 0, ppp_settings.maxconnect);
donatien	0:632c9925f013	713	}
donatien	0:632c9925f013	714	}
donatien	0:632c9925f013	715	++num_np_up;
donatien	0:632c9925f013	716	}
donatien	0:632c9925f013	717
donatien	0:632c9925f013	718	/*
donatien	0:632c9925f013	719	* np_down - a network protocol has gone down.
donatien	0:632c9925f013	720	*/
donatien	0:632c9925f013	721	void
donatien	0:632c9925f013	722	np_down(int unit, u16_t proto)
donatien	0:632c9925f013	723	{
donatien	0:632c9925f013	724	LWIP_UNUSED_ARG(unit);
donatien	0:632c9925f013	725	LWIP_UNUSED_ARG(proto);
donatien	0:632c9925f013	726
donatien	0:632c9925f013	727	AUTHDEBUG(LOG_INFO, ("np_down: %d proto=%X\n", unit, proto));
donatien	0:632c9925f013	728	if (--num_np_up == 0 && ppp_settings.idle_time_limit > 0) {
donatien	0:632c9925f013	729	UNTIMEOUT(check_idle, NULL);
donatien	0:632c9925f013	730	}
donatien	0:632c9925f013	731	}
donatien	0:632c9925f013	732
donatien	0:632c9925f013	733	/*
donatien	0:632c9925f013	734	* np_finished - a network protocol has finished using the link.
donatien	0:632c9925f013	735	*/
donatien	0:632c9925f013	736	void
donatien	0:632c9925f013	737	np_finished(int unit, u16_t proto)
donatien	0:632c9925f013	738	{
donatien	0:632c9925f013	739	LWIP_UNUSED_ARG(unit);
donatien	0:632c9925f013	740	LWIP_UNUSED_ARG(proto);
donatien	0:632c9925f013	741
donatien	0:632c9925f013	742	AUTHDEBUG(LOG_INFO, ("np_finished: %d proto=%X\n", unit, proto));
donatien	0:632c9925f013	743	if (--num_np_open <= 0) {
donatien	0:632c9925f013	744	/* no further use for the link: shut up shop. */
donatien	0:632c9925f013	745	lcp_close(0, "No network protocols running");
donatien	0:632c9925f013	746	}
donatien	0:632c9925f013	747	}
donatien	0:632c9925f013	748
donatien	0:632c9925f013	749	/*
donatien	0:632c9925f013	750	* check_idle - check whether the link has been idle for long
donatien	0:632c9925f013	751	* enough that we can shut it down.
donatien	0:632c9925f013	752	*/
donatien	0:632c9925f013	753	static void
donatien	0:632c9925f013	754	check_idle(void *arg)
donatien	0:632c9925f013	755	{
donatien	0:632c9925f013	756	struct ppp_idle idle;
donatien	0:632c9925f013	757	u_short itime;
donatien	0:632c9925f013	758
donatien	0:632c9925f013	759	LWIP_UNUSED_ARG(arg);
donatien	0:632c9925f013	760	if (!get_idle_time(0, &idle)) {
donatien	0:632c9925f013	761	return;
donatien	0:632c9925f013	762	}
donatien	0:632c9925f013	763	itime = LWIP_MIN(idle.xmit_idle, idle.recv_idle);
donatien	0:632c9925f013	764	if (itime >= ppp_settings.idle_time_limit) {
donatien	0:632c9925f013	765	/* link is idle: shut it down. */
donatien	0:632c9925f013	766	AUTHDEBUG(LOG_INFO, ("Terminating connection due to lack of activity.\n"));
donatien	0:632c9925f013	767	lcp_close(0, "Link inactive");
donatien	0:632c9925f013	768	} else {
donatien	0:632c9925f013	769	TIMEOUT(check_idle, NULL, ppp_settings.idle_time_limit - itime);
donatien	0:632c9925f013	770	}
donatien	0:632c9925f013	771	}
donatien	0:632c9925f013	772
donatien	0:632c9925f013	773	/*
donatien	0:632c9925f013	774	* connect_time_expired - log a message and close the connection.
donatien	0:632c9925f013	775	*/
donatien	0:632c9925f013	776	static void
donatien	0:632c9925f013	777	connect_time_expired(void *arg)
donatien	0:632c9925f013	778	{
donatien	0:632c9925f013	779	LWIP_UNUSED_ARG(arg);
donatien	0:632c9925f013	780
donatien	0:632c9925f013	781	AUTHDEBUG(LOG_INFO, ("Connect time expired\n"));
donatien	0:632c9925f013	782	lcp_close(0, "Connect time expired"); /* Close connection */
donatien	0:632c9925f013	783	}
donatien	0:632c9925f013	784
donatien	0:632c9925f013	785	#if 0 /* UNUSED */
donatien	0:632c9925f013	786	/*
donatien	0:632c9925f013	787	* auth_check_options - called to check authentication options.
donatien	0:632c9925f013	788	*/
donatien	0:632c9925f013	789	void
donatien	0:632c9925f013	790	auth_check_options(void)
donatien	0:632c9925f013	791	{
donatien	0:632c9925f013	792	lcp_options *wo = &lcp_wantoptions[0];
donatien	0:632c9925f013	793	int can_auth;
donatien	0:632c9925f013	794	ipcp_options *ipwo = &ipcp_wantoptions[0];
donatien	0:632c9925f013	795	u32_t remote;
donatien	0:632c9925f013	796
donatien	0:632c9925f013	797	/* Default our_name to hostname, and user to our_name */
donatien	0:632c9925f013	798	if (ppp_settings.our_name[0] == 0 \|\| ppp_settings.usehostname) {
donatien	0:632c9925f013	799	strcpy(ppp_settings.our_name, ppp_settings.hostname);
donatien	0:632c9925f013	800	}
donatien	0:632c9925f013	801
donatien	0:632c9925f013	802	if (ppp_settings.user[0] == 0) {
donatien	0:632c9925f013	803	strcpy(ppp_settings.user, ppp_settings.our_name);
donatien	0:632c9925f013	804	}
donatien	0:632c9925f013	805
donatien	0:632c9925f013	806	/* If authentication is required, ask peer for CHAP or PAP. */
donatien	0:632c9925f013	807	if (ppp_settings.auth_required && !wo->neg_chap && !wo->neg_upap) {
donatien	0:632c9925f013	808	wo->neg_chap = 1;
donatien	0:632c9925f013	809	wo->neg_upap = 1;
donatien	0:632c9925f013	810	}
donatien	0:632c9925f013	811
donatien	0:632c9925f013	812	/*
donatien	0:632c9925f013	813	* Check whether we have appropriate secrets to use
donatien	0:632c9925f013	814	* to authenticate the peer.
donatien	0:632c9925f013	815	*/
donatien	0:632c9925f013	816	can_auth = wo->neg_upap && have_pap_secret();
donatien	0:632c9925f013	817	if (!can_auth && wo->neg_chap) {
donatien	0:632c9925f013	818	remote = ipwo->accept_remote? 0: ipwo->hisaddr;
donatien	0:632c9925f013	819	can_auth = have_chap_secret(ppp_settings.remote_name, ppp_settings.our_name, remote);
donatien	0:632c9925f013	820	}
donatien	0:632c9925f013	821
donatien	0:632c9925f013	822	if (ppp_settings.auth_required && !can_auth) {
donatien	0:632c9925f013	823	ppp_panic("No auth secret");
donatien	0:632c9925f013	824	}
donatien	0:632c9925f013	825	}
donatien	0:632c9925f013	826	#endif /* UNUSED */
donatien	0:632c9925f013	827
donatien	0:632c9925f013	828	/*
donatien	0:632c9925f013	829	* auth_reset - called when LCP is starting negotiations to recheck
donatien	0:632c9925f013	830	* authentication options, i.e. whether we have appropriate secrets
donatien	0:632c9925f013	831	* to use for authenticating ourselves and/or the peer.
donatien	0:632c9925f013	832	*/
donatien	0:632c9925f013	833	void
donatien	0:632c9925f013	834	auth_reset(int unit)
donatien	0:632c9925f013	835	{
donatien	0:632c9925f013	836	lcp_options *go = &lcp_gotoptions[unit];
donatien	0:632c9925f013	837	lcp_options *ao = &lcp_allowoptions[0];
donatien	0:632c9925f013	838	ipcp_options *ipwo = &ipcp_wantoptions[0];
donatien	0:632c9925f013	839	u32_t remote;
donatien	0:632c9925f013	840
donatien	0:632c9925f013	841	AUTHDEBUG(LOG_INFO, ("auth_reset: %d\n", unit));
donatien	0:632c9925f013	842	ao->neg_upap = !ppp_settings.refuse_pap && (ppp_settings.passwd[0] != 0 \|\| get_pap_passwd(unit, NULL, NULL));
donatien	0:632c9925f013	843	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)/;
donatien	0:632c9925f013	844
donatien	0:632c9925f013	845	if (go->neg_upap && !have_pap_secret()) {
donatien	0:632c9925f013	846	go->neg_upap = 0;
donatien	0:632c9925f013	847	}
donatien	0:632c9925f013	848	if (go->neg_chap) {
donatien	0:632c9925f013	849	remote = ipwo->accept_remote? 0: ipwo->hisaddr;
donatien	0:632c9925f013	850	if (!have_chap_secret(ppp_settings.remote_name, ppp_settings.our_name, remote)) {
donatien	0:632c9925f013	851	go->neg_chap = 0;
donatien	0:632c9925f013	852	}
donatien	0:632c9925f013	853	}
donatien	0:632c9925f013	854	}
donatien	0:632c9925f013	855
donatien	0:632c9925f013	856	#if PAP_SUPPORT
donatien	0:632c9925f013	857	/*
donatien	0:632c9925f013	858	* check_passwd - Check the user name and passwd against the PAP secrets
donatien	0:632c9925f013	859	* file. If requested, also check against the system password database,
donatien	0:632c9925f013	860	* and login the user if OK.
donatien	0:632c9925f013	861	*
donatien	0:632c9925f013	862	* returns:
donatien	0:632c9925f013	863	* UPAP_AUTHNAK: Authentication failed.
donatien	0:632c9925f013	864	* UPAP_AUTHACK: Authentication succeeded.
donatien	0:632c9925f013	865	* In either case, msg points to an appropriate message.
donatien	0:632c9925f013	866	*/
donatien	0:632c9925f013	867	u_char
donatien	0:632c9925f013	868	check_passwd( int unit, char auser, int userlen, char apasswd, int passwdlen, char *msg, int msglen)
donatien	0:632c9925f013	869	{
donatien	0:632c9925f013	870	#if 1 /* XXX Assume all entries OK. */
donatien	0:632c9925f013	871	LWIP_UNUSED_ARG(unit);
donatien	0:632c9925f013	872	LWIP_UNUSED_ARG(auser);
donatien	0:632c9925f013	873	LWIP_UNUSED_ARG(userlen);
donatien	0:632c9925f013	874	LWIP_UNUSED_ARG(apasswd);
donatien	0:632c9925f013	875	LWIP_UNUSED_ARG(passwdlen);
donatien	0:632c9925f013	876	LWIP_UNUSED_ARG(msglen);
donatien	0:632c9925f013	877	msg = (char ) 0;
donatien	0:632c9925f013	878	return UPAP_AUTHACK; /* XXX Assume all entries OK. */
donatien	0:632c9925f013	879	#else
donatien	0:632c9925f013	880	u_char ret = 0;
donatien	0:632c9925f013	881	struct wordlist *addrs = NULL;
donatien	0:632c9925f013	882	char passwd[256], user[256];
donatien	0:632c9925f013	883	char secret[MAXWORDLEN];
donatien	0:632c9925f013	884	static u_short attempts = 0;
donatien	0:632c9925f013	885
donatien	0:632c9925f013	886	/*
donatien	0:632c9925f013	887	* Make copies of apasswd and auser, then null-terminate them.
donatien	0:632c9925f013	888	*/
donatien	0:632c9925f013	889	BCOPY(apasswd, passwd, passwdlen);
donatien	0:632c9925f013	890	passwd[passwdlen] = '\0';
donatien	0:632c9925f013	891	BCOPY(auser, user, userlen);
donatien	0:632c9925f013	892	user[userlen] = '\0';
donatien	0:632c9925f013	893	msg = (char ) 0;
donatien	0:632c9925f013	894
donatien	0:632c9925f013	895	/* XXX Validate user name and password. */
donatien	0:632c9925f013	896	ret = UPAP_AUTHACK; /* XXX Assume all entries OK. */
donatien	0:632c9925f013	897
donatien	0:632c9925f013	898	if (ret == UPAP_AUTHNAK) {
donatien	0:632c9925f013	899	if (msg == (char ) 0) {
donatien	0:632c9925f013	900	*msg = "Login incorrect";
donatien	0:632c9925f013	901	}
donatien	0:632c9925f013	902	msglen = strlen(msg);
donatien	0:632c9925f013	903	/*
donatien	0:632c9925f013	904	* Frustrate passwd stealer programs.
donatien	0:632c9925f013	905	* Allow 10 tries, but start backing off after 3 (stolen from login).
donatien	0:632c9925f013	906	* On 10'th, drop the connection.
donatien	0:632c9925f013	907	*/
donatien	0:632c9925f013	908	if (attempts++ >= 10) {
donatien	0:632c9925f013	909	AUTHDEBUG(LOG_WARNING, ("%d LOGIN FAILURES BY %s\n", attempts, user));
donatien	0:632c9925f013	910	/ppp_panic("Excess Bad Logins");/
donatien	0:632c9925f013	911	}
donatien	0:632c9925f013	912	if (attempts > 3) {
donatien	0:632c9925f013	913	/* @todo: this was sleep(), i.e. seconds, not milliseconds
donatien	0:632c9925f013	914	* I don't think we really need this in lwIP - we would block tcpip_thread!
donatien	0:632c9925f013	915	*/
donatien	0:632c9925f013	916	/sys_msleep((attempts - 3) 5);*/
donatien	0:632c9925f013	917	}
donatien	0:632c9925f013	918	if (addrs != NULL) {
donatien	0:632c9925f013	919	free_wordlist(addrs);
donatien	0:632c9925f013	920	}
donatien	0:632c9925f013	921	} else {
donatien	0:632c9925f013	922	attempts = 0; /* Reset count */
donatien	0:632c9925f013	923	if (msg == (char ) 0) {
donatien	0:632c9925f013	924	*msg = "Login ok";
donatien	0:632c9925f013	925	}
donatien	0:632c9925f013	926	msglen = strlen(msg);
donatien	0:632c9925f013	927	set_allowed_addrs(unit, addrs);
donatien	0:632c9925f013	928	}
donatien	0:632c9925f013	929
donatien	0:632c9925f013	930	BZERO(passwd, sizeof(passwd));
donatien	0:632c9925f013	931	BZERO(secret, sizeof(secret));
donatien	0:632c9925f013	932
donatien	0:632c9925f013	933	return ret;
donatien	0:632c9925f013	934	#endif
donatien	0:632c9925f013	935	}
donatien	0:632c9925f013	936	#endif /* PAP_SUPPORT */
donatien	0:632c9925f013	937
donatien	0:632c9925f013	938	#if 0 /* UNUSED */
donatien	0:632c9925f013	939	/*
donatien	0:632c9925f013	940	* This function is needed for PAM.
donatien	0:632c9925f013	941	*/
donatien	0:632c9925f013	942
donatien	0:632c9925f013	943	#ifdef USE_PAM
donatien	0:632c9925f013	944
donatien	0:632c9925f013	945	/* lwip does not support PAM*/
donatien	0:632c9925f013	946
donatien	0:632c9925f013	947	#endif /* USE_PAM */
donatien	0:632c9925f013	948
donatien	0:632c9925f013	949	#endif /* UNUSED */
donatien	0:632c9925f013	950
donatien	0:632c9925f013	951
donatien	0:632c9925f013	952	#if 0 /* UNUSED */
donatien	0:632c9925f013	953	/*
donatien	0:632c9925f013	954	* plogin - Check the user name and password against the system
donatien	0:632c9925f013	955	* password database, and login the user if OK.
donatien	0:632c9925f013	956	*
donatien	0:632c9925f013	957	* returns:
donatien	0:632c9925f013	958	* UPAP_AUTHNAK: Login failed.
donatien	0:632c9925f013	959	* UPAP_AUTHACK: Login succeeded.
donatien	0:632c9925f013	960	* In either case, msg points to an appropriate message.
donatien	0:632c9925f013	961	*/
donatien	0:632c9925f013	962	static int
donatien	0:632c9925f013	963	plogin(char user, char passwd, char *msg, int msglen)
donatien	0:632c9925f013	964	{
donatien	0:632c9925f013	965
donatien	0:632c9925f013	966	LWIP_UNUSED_ARG(user);
donatien	0:632c9925f013	967	LWIP_UNUSED_ARG(passwd);
donatien	0:632c9925f013	968	LWIP_UNUSED_ARG(msg);
donatien	0:632c9925f013	969	LWIP_UNUSED_ARG(msglen);
donatien	0:632c9925f013	970
donatien	0:632c9925f013	971
donatien	0:632c9925f013	972	/* The new lines are here align the file when
donatien	0:632c9925f013	973	* compared against the pppd 2.3.11 code */
donatien	0:632c9925f013	974
donatien	0:632c9925f013	975
donatien	0:632c9925f013	976
donatien	0:632c9925f013	977
donatien	0:632c9925f013	978
donatien	0:632c9925f013	979
donatien	0:632c9925f013	980
donatien	0:632c9925f013	981
donatien	0:632c9925f013	982
donatien	0:632c9925f013	983
donatien	0:632c9925f013	984
donatien	0:632c9925f013	985
donatien	0:632c9925f013	986
donatien	0:632c9925f013	987
donatien	0:632c9925f013	988
donatien	0:632c9925f013	989
donatien	0:632c9925f013	990	/* XXX Fail until we decide that we want to support logins. */
donatien	0:632c9925f013	991	return (UPAP_AUTHNAK);
donatien	0:632c9925f013	992	}
donatien	0:632c9925f013	993	#endif
donatien	0:632c9925f013	994
donatien	0:632c9925f013	995
donatien	0:632c9925f013	996
donatien	0:632c9925f013	997	/*
donatien	0:632c9925f013	998	* plogout - Logout the user.
donatien	0:632c9925f013	999	*/
donatien	0:632c9925f013	1000	static void
donatien	0:632c9925f013	1001	plogout(void)
donatien	0:632c9925f013	1002	{
donatien	0:632c9925f013	1003	logged_in = 0;
donatien	0:632c9925f013	1004	}
donatien	0:632c9925f013	1005
donatien	0:632c9925f013	1006	/*
donatien	0:632c9925f013	1007	* null_login - Check if a username of "" and a password of "" are
donatien	0:632c9925f013	1008	* acceptable, and iff so, set the list of acceptable IP addresses
donatien	0:632c9925f013	1009	* and return 1.
donatien	0:632c9925f013	1010	*/
donatien	0:632c9925f013	1011	static int
donatien	0:632c9925f013	1012	null_login(int unit)
donatien	0:632c9925f013	1013	{
donatien	0:632c9925f013	1014	LWIP_UNUSED_ARG(unit);
donatien	0:632c9925f013	1015	/* XXX Fail until we decide that we want to support logins. */
donatien	0:632c9925f013	1016	return 0;
donatien	0:632c9925f013	1017	}
donatien	0:632c9925f013	1018
donatien	0:632c9925f013	1019
donatien	0:632c9925f013	1020	/*
donatien	0:632c9925f013	1021	* get_pap_passwd - get a password for authenticating ourselves with
donatien	0:632c9925f013	1022	* our peer using PAP. Returns 1 on success, 0 if no suitable password
donatien	0:632c9925f013	1023	* could be found.
donatien	0:632c9925f013	1024	*/
donatien	0:632c9925f013	1025	static int
donatien	0:632c9925f013	1026	get_pap_passwd(int unit, char user, char passwd)
donatien	0:632c9925f013	1027	{
donatien	0:632c9925f013	1028	LWIP_UNUSED_ARG(unit);
donatien	0:632c9925f013	1029	/* normally we would reject PAP if no password is provided,
donatien	0:632c9925f013	1030	but this causes problems with some providers (like CHT in Taiwan)
donatien	0:632c9925f013	1031	who incorrectly request PAP and expect a bogus/empty password, so
donatien	0:632c9925f013	1032	always provide a default user/passwd of "none"/"none"
donatien	0:632c9925f013	1033
donatien	0:632c9925f013	1034	@todo: This should be configured by the user, instead of being hardcoded here!
donatien	0:632c9925f013	1035	*/
donatien	0:632c9925f013	1036	if(user) {
donatien	0:632c9925f013	1037	strcpy(user, "none");
donatien	0:632c9925f013	1038	}
donatien	0:632c9925f013	1039	if(passwd) {
donatien	0:632c9925f013	1040	strcpy(passwd, "none");
donatien	0:632c9925f013	1041	}
donatien	0:632c9925f013	1042	return 1;
donatien	0:632c9925f013	1043	}
donatien	0:632c9925f013	1044
donatien	0:632c9925f013	1045	/*
donatien	0:632c9925f013	1046	* have_pap_secret - check whether we have a PAP file with any
donatien	0:632c9925f013	1047	* secrets that we could possibly use for authenticating the peer.
donatien	0:632c9925f013	1048	*/
donatien	0:632c9925f013	1049	static int
donatien	0:632c9925f013	1050	have_pap_secret(void)
donatien	0:632c9925f013	1051	{
donatien	0:632c9925f013	1052	/* XXX Fail until we set up our passwords. */
donatien	0:632c9925f013	1053	return 0;
donatien	0:632c9925f013	1054	}
donatien	0:632c9925f013	1055
donatien	0:632c9925f013	1056	/*
donatien	0:632c9925f013	1057	* have_chap_secret - check whether we have a CHAP file with a
donatien	0:632c9925f013	1058	* secret that we could possibly use for authenticating `client'
donatien	0:632c9925f013	1059	* on `server'. Either can be the null string, meaning we don't
donatien	0:632c9925f013	1060	* know the identity yet.
donatien	0:632c9925f013	1061	*/
donatien	0:632c9925f013	1062	static int
donatien	0:632c9925f013	1063	have_chap_secret(char client, char server, u32_t remote)
donatien	0:632c9925f013	1064	{
donatien	0:632c9925f013	1065	LWIP_UNUSED_ARG(client);
donatien	0:632c9925f013	1066	LWIP_UNUSED_ARG(server);
donatien	0:632c9925f013	1067	LWIP_UNUSED_ARG(remote);
donatien	0:632c9925f013	1068
donatien	0:632c9925f013	1069	/* XXX Fail until we set up our passwords. */
donatien	0:632c9925f013	1070	return 0;
donatien	0:632c9925f013	1071	}
donatien	0:632c9925f013	1072	#if CHAP_SUPPORT
donatien	0:632c9925f013	1073
donatien	0:632c9925f013	1074	/*
donatien	0:632c9925f013	1075	* get_secret - open the CHAP secret file and return the secret
donatien	0:632c9925f013	1076	* for authenticating the given client on the given server.
donatien	0:632c9925f013	1077	* (We could be either client or server).
donatien	0:632c9925f013	1078	*/
donatien	0:632c9925f013	1079	int
donatien	0:632c9925f013	1080	get_secret(int unit, char client, char server, char secret, int secret_len, int save_addrs)
donatien	0:632c9925f013	1081	{
donatien	0:632c9925f013	1082	#if 1
donatien	0:632c9925f013	1083	int len;
donatien	0:632c9925f013	1084	struct wordlist *addrs;
donatien	0:632c9925f013	1085
donatien	0:632c9925f013	1086	LWIP_UNUSED_ARG(unit);
donatien	0:632c9925f013	1087	LWIP_UNUSED_ARG(server);
donatien	0:632c9925f013	1088	LWIP_UNUSED_ARG(save_addrs);
donatien	0:632c9925f013	1089
donatien	0:632c9925f013	1090	addrs = NULL;
donatien	0:632c9925f013	1091
donatien	0:632c9925f013	1092	if(!client \|\| !client[0] \|\| strcmp(client, ppp_settings.user)) {
donatien	0:632c9925f013	1093	return 0;
donatien	0:632c9925f013	1094	}
donatien	0:632c9925f013	1095
donatien	0:632c9925f013	1096	len = (int)strlen(ppp_settings.passwd);
donatien	0:632c9925f013	1097	if (len > MAXSECRETLEN) {
donatien	0:632c9925f013	1098	AUTHDEBUG(LOG_ERR, ("Secret for %s on %s is too long\n", client, server));
donatien	0:632c9925f013	1099	len = MAXSECRETLEN;
donatien	0:632c9925f013	1100	}
donatien	0:632c9925f013	1101
donatien	0:632c9925f013	1102	BCOPY(ppp_settings.passwd, secret, len);
donatien	0:632c9925f013	1103	*secret_len = len;
donatien	0:632c9925f013	1104
donatien	0:632c9925f013	1105	return 1;
donatien	0:632c9925f013	1106	#else
donatien	0:632c9925f013	1107	int ret = 0, len;
donatien	0:632c9925f013	1108	struct wordlist *addrs;
donatien	0:632c9925f013	1109	char secbuf[MAXWORDLEN];
donatien	0:632c9925f013	1110
donatien	0:632c9925f013	1111	addrs = NULL;
donatien	0:632c9925f013	1112	secbuf[0] = 0;
donatien	0:632c9925f013	1113
donatien	0:632c9925f013	1114	/* XXX Find secret. */
donatien	0:632c9925f013	1115	if (ret < 0) {
donatien	0:632c9925f013	1116	return 0;
donatien	0:632c9925f013	1117	}
donatien	0:632c9925f013	1118
donatien	0:632c9925f013	1119	if (save_addrs) {
donatien	0:632c9925f013	1120	set_allowed_addrs(unit, addrs);
donatien	0:632c9925f013	1121	}
donatien	0:632c9925f013	1122
donatien	0:632c9925f013	1123	len = strlen(secbuf);
donatien	0:632c9925f013	1124	if (len > MAXSECRETLEN) {
donatien	0:632c9925f013	1125	AUTHDEBUG(LOG_ERR, ("Secret for %s on %s is too long\n", client, server));
donatien	0:632c9925f013	1126	len = MAXSECRETLEN;
donatien	0:632c9925f013	1127	}
donatien	0:632c9925f013	1128
donatien	0:632c9925f013	1129	BCOPY(secbuf, secret, len);
donatien	0:632c9925f013	1130	BZERO(secbuf, sizeof(secbuf));
donatien	0:632c9925f013	1131	*secret_len = len;
donatien	0:632c9925f013	1132
donatien	0:632c9925f013	1133	return 1;
donatien	0:632c9925f013	1134	#endif
donatien	0:632c9925f013	1135	}
donatien	0:632c9925f013	1136	#endif /* CHAP_SUPPORT */
donatien	0:632c9925f013	1137
donatien	0:632c9925f013	1138
donatien	0:632c9925f013	1139	#if 0 /* PAP_SUPPORT \|\| CHAP_SUPPORT */
donatien	0:632c9925f013	1140	/*
donatien	0:632c9925f013	1141	* set_allowed_addrs() - set the list of allowed addresses.
donatien	0:632c9925f013	1142	*/
donatien	0:632c9925f013	1143	static void
donatien	0:632c9925f013	1144	set_allowed_addrs(int unit, struct wordlist *addrs)
donatien	0:632c9925f013	1145	{
donatien	0:632c9925f013	1146	if (addresses[unit] != NULL) {
donatien	0:632c9925f013	1147	free_wordlist(addresses[unit]);
donatien	0:632c9925f013	1148	}
donatien	0:632c9925f013	1149	addresses[unit] = addrs;
donatien	0:632c9925f013	1150
donatien	0:632c9925f013	1151	#if 0
donatien	0:632c9925f013	1152	/*
donatien	0:632c9925f013	1153	* If there's only one authorized address we might as well
donatien	0:632c9925f013	1154	* ask our peer for that one right away
donatien	0:632c9925f013	1155	*/
donatien	0:632c9925f013	1156	if (addrs != NULL && addrs->next == NULL) {
donatien	0:632c9925f013	1157	char *p = addrs->word;
donatien	0:632c9925f013	1158	struct ipcp_options *wo = &ipcp_wantoptions[unit];
donatien	0:632c9925f013	1159	u32_t a;
donatien	0:632c9925f013	1160	struct hostent *hp;
donatien	0:632c9925f013	1161
donatien	0:632c9925f013	1162	if (wo->hisaddr == 0 && p != '!' && p != '-' && strchr(p, '/') == NULL) {
donatien	0:632c9925f013	1163	hp = gethostbyname(p);
donatien	0:632c9925f013	1164	if (hp != NULL && hp->h_addrtype == AF_INET) {
donatien	0:632c9925f013	1165	a = (u32_t )hp->h_addr;
donatien	0:632c9925f013	1166	} else {
donatien	0:632c9925f013	1167	a = inet_addr(p);
donatien	0:632c9925f013	1168	}
donatien	0:632c9925f013	1169	if (a != (u32_t) -1) {
donatien	0:632c9925f013	1170	wo->hisaddr = a;
donatien	0:632c9925f013	1171	}
donatien	0:632c9925f013	1172	}
donatien	0:632c9925f013	1173	}
donatien	0:632c9925f013	1174	#endif
donatien	0:632c9925f013	1175	}
donatien	0:632c9925f013	1176	#endif /* 0 / / PAP_SUPPORT \|\| CHAP_SUPPORT */
donatien	0:632c9925f013	1177
donatien	0:632c9925f013	1178	/*
donatien	0:632c9925f013	1179	* auth_ip_addr - check whether the peer is authorized to use
donatien	0:632c9925f013	1180	* a given IP address. Returns 1 if authorized, 0 otherwise.
donatien	0:632c9925f013	1181	*/
donatien	0:632c9925f013	1182	int
donatien	0:632c9925f013	1183	auth_ip_addr(int unit, u32_t addr)
donatien	0:632c9925f013	1184	{
donatien	0:632c9925f013	1185	return ip_addr_check(addr, addresses[unit]);
donatien	0:632c9925f013	1186	}
donatien	0:632c9925f013	1187
donatien	0:632c9925f013	1188	static int /* @todo: integrate this funtion into auth_ip_addr()*/
donatien	0:632c9925f013	1189	ip_addr_check(u32_t addr, struct wordlist *addrs)
donatien	0:632c9925f013	1190	{
donatien	0:632c9925f013	1191	/* don't allow loopback or multicast address */
donatien	0:632c9925f013	1192	if (bad_ip_adrs(addr)) {
donatien	0:632c9925f013	1193	return 0;
donatien	0:632c9925f013	1194	}
donatien	0:632c9925f013	1195
donatien	0:632c9925f013	1196	if (addrs == NULL) {
donatien	0:632c9925f013	1197	return !ppp_settings.auth_required; /* no addresses authorized */
donatien	0:632c9925f013	1198	}
donatien	0:632c9925f013	1199
donatien	0:632c9925f013	1200	/* XXX All other addresses allowed. */
donatien	0:632c9925f013	1201	return 1;
donatien	0:632c9925f013	1202	}
donatien	0:632c9925f013	1203
donatien	0:632c9925f013	1204	/*
donatien	0:632c9925f013	1205	* bad_ip_adrs - return 1 if the IP address is one we don't want
donatien	0:632c9925f013	1206	* to use, such as an address in the loopback net or a multicast address.
donatien	0:632c9925f013	1207	* addr is in network byte order.
donatien	0:632c9925f013	1208	*/
donatien	0:632c9925f013	1209	int
donatien	0:632c9925f013	1210	bad_ip_adrs(u32_t addr)
donatien	0:632c9925f013	1211	{
donatien	0:632c9925f013	1212	addr = ntohl(addr);
donatien	0:632c9925f013	1213	return (addr >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET
donatien	0:632c9925f013	1214	\|\| IN_MULTICAST(addr) \|\| IN_BADCLASS(addr);
donatien	0:632c9925f013	1215	}
donatien	0:632c9925f013	1216
donatien	0:632c9925f013	1217	#if 0 /* UNUSED / / PAP_SUPPORT \|\| CHAP_SUPPORT */
donatien	0:632c9925f013	1218	/*
donatien	0:632c9925f013	1219	* some_ip_ok - check a wordlist to see if it authorizes any
donatien	0:632c9925f013	1220	* IP address(es).
donatien	0:632c9925f013	1221	*/
donatien	0:632c9925f013	1222	static int
donatien	0:632c9925f013	1223	some_ip_ok(struct wordlist *addrs)
donatien	0:632c9925f013	1224	{
donatien	0:632c9925f013	1225	for (; addrs != 0; addrs = addrs->next) {
donatien	0:632c9925f013	1226	if (addrs->word[0] == '-')
donatien	0:632c9925f013	1227	break;
donatien	0:632c9925f013	1228	if (addrs->word[0] != '!')
donatien	0:632c9925f013	1229	return 1; /* some IP address is allowed */
donatien	0:632c9925f013	1230	}
donatien	0:632c9925f013	1231	return 0;
donatien	0:632c9925f013	1232	}
donatien	0:632c9925f013	1233
donatien	0:632c9925f013	1234	/*
donatien	0:632c9925f013	1235	* check_access - complain if a secret file has too-liberal permissions.
donatien	0:632c9925f013	1236	*/
donatien	0:632c9925f013	1237	static void
donatien	0:632c9925f013	1238	check_access(FILE f, char filename)
donatien	0:632c9925f013	1239	{
donatien	0:632c9925f013	1240	struct stat sbuf;
donatien	0:632c9925f013	1241
donatien	0:632c9925f013	1242	if (fstat(fileno(f), &sbuf) < 0) {
donatien	0:632c9925f013	1243	warn("cannot stat secret file %s: %m", filename);
donatien	0:632c9925f013	1244	} else if ((sbuf.st_mode & (S_IRWXG \| S_IRWXO)) != 0) {
donatien	0:632c9925f013	1245	warn("Warning - secret file %s has world and/or group access",
donatien	0:632c9925f013	1246	filename);
donatien	0:632c9925f013	1247	}
donatien	0:632c9925f013	1248	}
donatien	0:632c9925f013	1249
donatien	0:632c9925f013	1250
donatien	0:632c9925f013	1251	/*
donatien	0:632c9925f013	1252	* scan_authfile - Scan an authorization file for a secret suitable
donatien	0:632c9925f013	1253	* for authenticating `client' on `server'. The return value is -1
donatien	0:632c9925f013	1254	* if no secret is found, otherwise >= 0. The return value has
donatien	0:632c9925f013	1255	* NONWILD_CLIENT set if the secret didn't have "*" for the client, and
donatien	0:632c9925f013	1256	* NONWILD_SERVER set if the secret didn't have "*" for the server.
donatien	0:632c9925f013	1257	* Any following words on the line up to a "--" (i.e. address authorization
donatien	0:632c9925f013	1258	* info) are placed in a wordlist and returned in *addrs. Any
donatien	0:632c9925f013	1259	* following words (extra options) are placed in a wordlist and
donatien	0:632c9925f013	1260	* returned in *opts.
donatien	0:632c9925f013	1261	* We assume secret is NULL or points to MAXWORDLEN bytes of space.
donatien	0:632c9925f013	1262	*/
donatien	0:632c9925f013	1263	static int
donatien	0:632c9925f013	1264	scan_authfile(FILE f, char client, char server, char secret, struct wordlist addrs, struct wordlist opts, char *filename)
donatien	0:632c9925f013	1265	{
donatien	0:632c9925f013	1266	/* We do not (currently) need this in lwip */
donatien	0:632c9925f013	1267	return 0; /* dummy */
donatien	0:632c9925f013	1268	}
donatien	0:632c9925f013	1269	/*
donatien	0:632c9925f013	1270	* free_wordlist - release memory allocated for a wordlist.
donatien	0:632c9925f013	1271	*/
donatien	0:632c9925f013	1272	static void
donatien	0:632c9925f013	1273	free_wordlist(struct wordlist *wp)
donatien	0:632c9925f013	1274	{
donatien	0:632c9925f013	1275	struct wordlist *next;
donatien	0:632c9925f013	1276
donatien	0:632c9925f013	1277	while (wp != NULL) {
donatien	0:632c9925f013	1278	next = wp->next;
donatien	0:632c9925f013	1279	free(wp);
donatien	0:632c9925f013	1280	wp = next;
donatien	0:632c9925f013	1281	}
donatien	0:632c9925f013	1282	}
donatien	0:632c9925f013	1283
donatien	0:632c9925f013	1284	/*
donatien	0:632c9925f013	1285	* auth_script_done - called when the auth-up or auth-down script
donatien	0:632c9925f013	1286	* has finished.
donatien	0:632c9925f013	1287	*/
donatien	0:632c9925f013	1288	static void
donatien	0:632c9925f013	1289	auth_script_done(void *arg)
donatien	0:632c9925f013	1290	{
donatien	0:632c9925f013	1291	auth_script_pid = 0;
donatien	0:632c9925f013	1292	switch (auth_script_state) {
donatien	0:632c9925f013	1293	case s_up:
donatien	0:632c9925f013	1294	if (auth_state == s_down) {
donatien	0:632c9925f013	1295	auth_script_state = s_down;
donatien	0:632c9925f013	1296	auth_script(_PATH_AUTHDOWN);
donatien	0:632c9925f013	1297	}
donatien	0:632c9925f013	1298	break;
donatien	0:632c9925f013	1299	case s_down:
donatien	0:632c9925f013	1300	if (auth_state == s_up) {
donatien	0:632c9925f013	1301	auth_script_state = s_up;
donatien	0:632c9925f013	1302	auth_script(_PATH_AUTHUP);
donatien	0:632c9925f013	1303	}
donatien	0:632c9925f013	1304	break;
donatien	0:632c9925f013	1305	}
donatien	0:632c9925f013	1306	}
donatien	0:632c9925f013	1307
donatien	0:632c9925f013	1308	/*
donatien	0:632c9925f013	1309	* auth_script - execute a script with arguments
donatien	0:632c9925f013	1310	* interface-name peer-name real-user tty speed
donatien	0:632c9925f013	1311	*/
donatien	0:632c9925f013	1312	static void
donatien	0:632c9925f013	1313	auth_script(char *script)
donatien	0:632c9925f013	1314	{
donatien	0:632c9925f013	1315	char strspeed[32];
donatien	0:632c9925f013	1316	struct passwd *pw;
donatien	0:632c9925f013	1317	char struid[32];
donatien	0:632c9925f013	1318	char *user_name;
donatien	0:632c9925f013	1319	char *argv[8];
donatien	0:632c9925f013	1320
donatien	0:632c9925f013	1321	if ((pw = getpwuid(getuid())) != NULL && pw->pw_name != NULL)
donatien	0:632c9925f013	1322	user_name = pw->pw_name;
donatien	0:632c9925f013	1323	else {
donatien	0:632c9925f013	1324	slprintf(struid, sizeof(struid), "%d", getuid());
donatien	0:632c9925f013	1325	user_name = struid;
donatien	0:632c9925f013	1326	}
donatien	0:632c9925f013	1327	slprintf(strspeed, sizeof(strspeed), "%d", baud_rate);
donatien	0:632c9925f013	1328
donatien	0:632c9925f013	1329	argv[0] = script;
donatien	0:632c9925f013	1330	argv[1] = ifname;
donatien	0:632c9925f013	1331	argv[2] = peer_authname;
donatien	0:632c9925f013	1332	argv[3] = user_name;
donatien	0:632c9925f013	1333	argv[4] = devnam;
donatien	0:632c9925f013	1334	argv[5] = strspeed;
donatien	0:632c9925f013	1335	argv[6] = NULL;
donatien	0:632c9925f013	1336
donatien	0:632c9925f013	1337	auth_script_pid = run_program(script, argv, 0, auth_script_done, NULL);
donatien	0:632c9925f013	1338	}
donatien	0:632c9925f013	1339	#endif /* 0 / / PAP_SUPPORT \|\| CHAP_SUPPORT */
donatien	0:632c9925f013	1340	#endif /* PPP_SUPPORT */

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Type:	Program
Created:	11 Jun 2010
Imports:	2654
Forks:	0
Commits:	12
Dependents:	3
Dependencies:	0
Followers:	13

This repository is Public (Unlisted).

lwip/netif/ppp/auth.c@0:632c9925f013, 2010-06-11 (annotated)

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