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      1 /*	$NetBSD: pppoectl.c,v 1.31 2022/08/07 11:06:18 andvar Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1997 Joerg Wunsch
      5  *
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  *
     28  * From: spppcontrol.c,v 1.3 1998/01/07 07:55:26 charnier Exp
     29  * From: ispppcontrol
     30  */
     31 #include <sys/cdefs.h>
     32 
     33 #ifndef lint
     34 __RCSID("$NetBSD: pppoectl.c,v 1.31 2022/08/07 11:06:18 andvar Exp $");
     35 #endif
     36 
     37 
     38 #include <sys/param.h>
     39 #include <sys/callout.h>
     40 #include <sys/ioctl.h>
     41 #include <sys/socket.h>
     42 #include <sys/time.h>
     43 #include <sys/sysctl.h>
     44 #include <net/if.h>
     45 #include <net/if_sppp.h>
     46 #include <net/if_pppoe.h>
     47 #include <arpa/inet.h>
     48 #include <err.h>
     49 #include <stdio.h>
     50 #include <stdlib.h>
     51 #include <string.h>
     52 #include <sysexits.h>
     53 #include <unistd.h>
     54 
     55 __dead static void usage(void);
     56 __dead static void print_error(const char *ifname, int error, const char * str);
     57 static void print_vals(const char *ifname, int phase, struct spppauthcfg *sp,
     58 	int lcp_timeout, time_t idle_timeout, int authfailures,
     59 	int max_auth_failures, u_int maxalive, time_t max_noreceive,
     60 	u_int alive_interval, int ncp_flags);
     61 static void print_dns(const char *ifname, int dns1, int dns2, int s, int tabs);
     62 static void print_stats(const char *ifname, int s, int dump);
     63 static const char *phase_name(int phase);
     64 static const char *proto_name(int proto);
     65 static const char *authflags(int flags);
     66 static const char *pppoe_state_name(int state);
     67 static const char *ppp_state_name(int state);
     68 static void pppoectl_argument(char *arg);
     69 
     70 #define	ISSET(x, a)	((x) & (a))
     71 #define PPPOECTL_IOCTL(_ifname, _s, _cmd, _st)	do {	\
     72 	int __e;					\
     73 	memset((_st), 0, sizeof(*(_st)));		\
     74 	strncpy((_st)->ifname, (_ifname),		\
     75 	    sizeof((_st)->ifname));			\
     76 	__e = ioctl((_s), (_cmd), (_st));		\
     77 	if (__e != 0)					\
     78 		print_error((_ifname), __e, #_cmd);	\
     79 } while (0)
     80 
     81 static int hz = 0;
     82 
     83 static int set_auth, set_lcp, set_idle_to, set_auth_failure, set_dns,
     84     clear_auth_failure_count, set_keepalive;
     85 static u_int set_ncpflags, clr_ncpflags;
     86 static int maxalive = -1;
     87 static int max_noreceive = -1;
     88 static int alive_intval = -1;
     89 static struct spppauthcfg spr;
     90 static struct sppplcpcfg lcp;
     91 static struct spppncpcfg ncp;
     92 static struct spppstatus status;
     93 static struct spppidletimeout timeout;
     94 static struct spppauthfailurestats authfailstats;
     95 static struct spppauthfailuresettings authfailset;
     96 static struct spppdnssettings dnssettings;
     97 static struct spppkeepalivesettings keepalivesettings;
     98 
     99 int
    100 main(int argc, char **argv)
    101 {
    102 	FILE *fp;
    103 	int s, c;
    104 	int errs = 0, verbose = 0, dump = 0, dns1 = 0, dns2 = 0;
    105 	size_t len;
    106 	const char *eth_if_name, *access_concentrator, *service;
    107 	const char *ifname, *configname;
    108 	char *line;
    109 	int mib[2];
    110 	struct clockinfo clockinfo;
    111 	setprogname(argv[0]);
    112 
    113 	eth_if_name = NULL;
    114 	access_concentrator = NULL;
    115 	service = NULL;
    116 	configname = NULL;
    117 	while ((c = getopt(argc, argv, "vde:f:s:a:n:")) != -1)
    118 		switch (c) {
    119 		case 'v':
    120 			verbose++;
    121 			break;
    122 
    123 		case 'd':
    124 			dump++;
    125 			break;
    126 
    127 		case 'e':
    128 			eth_if_name = optarg;
    129 			break;
    130 
    131 		case 'f':
    132 			configname = optarg;
    133 			break;
    134 
    135 		case 's':
    136 			service = optarg;
    137 			break;
    138 
    139 		case 'a':
    140 			access_concentrator = optarg;
    141 			break;
    142 
    143 		case 'n':
    144 			if (strcmp(optarg, "1") == 0)
    145 				dns1 = 1;
    146 			else if (strcmp(optarg, "2") == 0)
    147 				dns2 = 1;
    148 			else {
    149 				fprintf(stderr, "bad argument \"%s\" to -n (only 1 or two allowed)\n",
    150 					optarg);
    151 				errs++;
    152 			}
    153 			break;
    154 
    155 		default:
    156 			errs++;
    157 			break;
    158 		}
    159 	argv += optind;
    160 	argc -= optind;
    161 
    162 	if (errs || argc < 1)
    163 		usage();
    164 
    165 	ifname = argv[0];
    166 
    167 	/* use a random AF to create the socket */
    168 	if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
    169 		err(EX_UNAVAILABLE, "ifconfig: socket");
    170 
    171 	argc--;
    172 	argv++;
    173 
    174 	if (eth_if_name) {
    175 		struct pppoediscparms parms;
    176 		int e;
    177 
    178 		memset(&parms, 0, sizeof parms);
    179 		strncpy(parms.ifname, ifname, sizeof(parms.ifname));
    180 		strncpy(parms.eth_ifname, eth_if_name, sizeof(parms.eth_ifname));
    181 		if (access_concentrator) {
    182 			parms.ac_name = access_concentrator;
    183 			parms.ac_name_len = strlen(access_concentrator);
    184 		}
    185 		if (service) {
    186 			parms.service_name = service;
    187 			parms.service_name_len = strlen(service);
    188 		}
    189 
    190 		e = ioctl(s, PPPOESETPARMS, &parms);
    191 		if (e)
    192 			print_error(ifname, e, "PPPOESETPARMS");
    193 		return 0;
    194 	}
    195 
    196 	if (dns1 || dns2) {
    197 		print_dns(ifname, dns1, dns2, s, 0);
    198 	}
    199 
    200 	if (dump) {
    201 		print_stats(ifname, s, dump);
    202 		return 0;
    203 	}
    204 
    205 	memset(&spr, 0, sizeof spr);
    206 	strncpy(spr.ifname, ifname, sizeof spr.ifname);
    207 	spr.myauth = SPPP_AUTHPROTO_NOCHG;
    208 	spr.hisauth = SPPP_AUTHPROTO_NOCHG;
    209 	memset(&lcp, 0, sizeof lcp);
    210 	strncpy(lcp.ifname, ifname, sizeof lcp.ifname);
    211 	memset(&ncp, 0, sizeof ncp);
    212 	strncpy(ncp.ifname, ifname, sizeof ncp.ifname);
    213 	memset(&status, 0, sizeof status);
    214 	strncpy(status.ifname, ifname, sizeof status.ifname);
    215 	memset(&timeout, 0, sizeof timeout);
    216 	strncpy(timeout.ifname, ifname, sizeof timeout.ifname);
    217 	memset(&authfailstats, 0, sizeof authfailstats);
    218 	strncpy(authfailstats.ifname, ifname, sizeof authfailstats.ifname);
    219 	memset(&authfailset, 0, sizeof authfailset);
    220 	strncpy(authfailset.ifname, ifname, sizeof authfailset.ifname);
    221 	memset(&dnssettings, 0, sizeof dnssettings);
    222 	strncpy(dnssettings.ifname, ifname, sizeof dnssettings.ifname);
    223 	memset(&keepalivesettings, 0, sizeof keepalivesettings);
    224 	strncpy(keepalivesettings.ifname, ifname, sizeof keepalivesettings.ifname);
    225 
    226 	mib[0] = CTL_KERN;
    227 	mib[1] = KERN_CLOCKRATE;
    228 	len = sizeof(clockinfo);
    229 	if(sysctl(mib, 2, &clockinfo, &len, NULL, 0) == -1)
    230 	{
    231 		fprintf(stderr, "error, cannot sysctl kern.clockrate!\n");
    232 		exit(1);
    233 	}
    234 
    235 	hz = clockinfo.hz;
    236 
    237 	if (argc == 0 && !(dns1||dns2) && !configname) {
    238 		/* list only mode */
    239 
    240 		/* first pass, get name lengths */
    241 		if (ioctl(s, SPPPGETAUTHCFG, &spr) == -1)
    242 			err(EX_OSERR, "SPPPGETAUTHCFG");
    243 		/* now allocate buffers for strings */
    244 		if (spr.myname_length)
    245 			if ((spr.myname = malloc(spr.myname_length)) == NULL)
    246 				err(1, NULL);
    247 		if (spr.hisname_length)
    248 			if ((spr.hisname = malloc(spr.hisname_length)) == NULL)
    249 				err(1, NULL);
    250 		/* second pass: get names too */
    251 		if (ioctl(s, SPPPGETAUTHCFG, &spr) == -1)
    252 			err(EX_OSERR, "SPPPGETAUTHCFG");
    253 
    254 		if (ioctl(s, SPPPGETLCPCFG, &lcp) == -1)
    255 			err(EX_OSERR, "SPPPGETLCPCFG");
    256 		if (ioctl(s, SPPPGETNCPCFG, &ncp) == -1)
    257 			err(EX_OSERR, "SPPPGETNCPCFG");
    258 		if (ioctl(s, SPPPGETSTATUS, &status) == -1)
    259 			err(EX_OSERR, "SPPPGETSTATUS");
    260 		if (ioctl(s, SPPPGETIDLETO, &timeout) == -1)
    261 			err(EX_OSERR, "SPPPGETIDLETO");
    262 		if (ioctl(s, SPPPGETAUTHFAILURES, &authfailstats) == -1)
    263 			err(EX_OSERR, "SPPPGETAUTHFAILURES");
    264 		if (ioctl(s, SPPPGETKEEPALIVE, &keepalivesettings) == -1)
    265 			err(EX_OSERR, "SPPPGETKEEPALIVE");
    266 
    267 		print_vals(ifname, status.phase, &spr, lcp.lcp_timeout,
    268 		    timeout.idle_seconds, authfailstats.auth_failures,
    269 		    authfailstats.max_failures,
    270 		    keepalivesettings.maxalive,
    271 		    keepalivesettings.max_noreceive,
    272 		    keepalivesettings.alive_interval,
    273 		    ncp.ncp_flags);
    274 
    275 		if (spr.hisname) free(spr.hisname);
    276 		if (spr.myname) free(spr.myname);
    277 		return 0;
    278 	}
    279 
    280 	/* first load the config file, then parse command line args */
    281 	if (configname && (fp = fopen(configname, "r")))
    282 		while ((line = fparseln(fp, NULL, NULL, NULL,
    283 		    FPARSELN_UNESCALL)) != NULL) {
    284 			if (line[0] != '\0')
    285 				pppoectl_argument(line);
    286 			/*
    287 			 * We do not free(line) here, because we
    288 			 * still have references to parts of the
    289 			 * string collected in the various ioctl
    290 			 * argument structures (and need those).
    291 			 * Yes, this is a memory leak.
    292 			 * We could copy the partial strings instead,
    293 			 * and free those later - but this is a one-shot
    294 			 * program and memory will be freed at process
    295 			 * exit time anyway.
    296 			 */
    297 		}
    298 
    299 
    300 	while (argc > 0) {
    301 		pppoectl_argument(argv[0]);
    302 
    303 		argv++;
    304 		argc--;
    305 	}
    306 
    307 	if (set_auth) {
    308 		if (ioctl(s, SPPPSETAUTHCFG, &spr) == -1)
    309 			err(EX_OSERR, "SPPPSETAUTHCFG");
    310 	}
    311 	if (set_lcp) {
    312 		if (ioctl(s, SPPPSETLCPCFG, &lcp) == -1)
    313 			err(EX_OSERR, "SPPPSETLCPCFG");
    314 	}
    315 	if (set_ncpflags != 0 || clr_ncpflags != 0) {
    316 		if (ioctl(s, SPPPGETNCPCFG, &ncp) == -1)
    317 			err(EX_OSERR, "SPPPGETNCPCFG");
    318 
    319 		ncp.ncp_flags |= set_ncpflags;
    320 		ncp.ncp_flags &= ~clr_ncpflags;
    321 
    322 		if (ioctl(s, SPPPSETNCPCFG, &ncp) == -1)
    323 			err(EX_OSERR, "SPPPSETNCPCFG");
    324 	}
    325 	if (set_idle_to) {
    326 		if (ioctl(s, SPPPSETIDLETO, &timeout) == -1)
    327 			err(EX_OSERR, "SPPPSETIDLETO");
    328 	}
    329 	if (set_auth_failure) {
    330 		if (ioctl(s, SPPPSETAUTHFAILURE, &authfailset) == -1)
    331 			err(EX_OSERR, "SPPPSETAUTHFAILURE");
    332 	}
    333 	if (clear_auth_failure_count && !(set_auth || set_auth_failure)) {
    334 		/*
    335 		 * We want to clear the auth failure count, but did not
    336 		 * do that implicitly by setting authentication - so
    337 		 * do a zero-effect auth setting change
    338 		 */
    339 		if (ioctl(s, SPPPGETAUTHFAILURES, &authfailstats) == -1)
    340 			err(EX_OSERR, "SPPPGETAUTHFAILURES");
    341 		authfailset.max_failures = authfailstats.max_failures;
    342 		if (ioctl(s, SPPPSETAUTHFAILURE, &authfailset) == -1)
    343 			err(EX_OSERR, "SPPPSETAUTHFAILURE");
    344 	}
    345 	if (set_dns) {
    346 		if (ioctl(s, SPPPSETDNSOPTS, &dnssettings) == -1)
    347 			err(EX_OSERR, "SPPPSETDNSOPTS");
    348 	}
    349 	if (set_keepalive) {
    350 		if (ioctl(s, SPPPGETKEEPALIVE, &keepalivesettings) == -1)
    351 			err(EX_OSERR, "SPPPGETKEEPALIVE");
    352 		if (max_noreceive >= 0)
    353 			keepalivesettings.max_noreceive = max_noreceive;
    354 		if (maxalive >= 0)
    355 			keepalivesettings.maxalive = maxalive;
    356 		if (alive_intval >= 0)
    357 			keepalivesettings.alive_interval = alive_intval;
    358 		if (ioctl(s, SPPPSETKEEPALIVE, &keepalivesettings) == -1)
    359 			err(EX_OSERR, "SPPPSETKEEPALIVE");
    360 	}
    361 
    362 	if (verbose) {
    363 		if (ioctl(s, SPPPGETAUTHFAILURES, &authfailstats) == -1)
    364 			err(EX_OSERR, "SPPPGETAUTHFAILURES");
    365 		if (ioctl(s, SPPPGETKEEPALIVE, &keepalivesettings) == -1)
    366 			err(EX_OSERR, "SPPPGETKEEPALIVE");
    367 		print_vals(ifname, status.phase, &spr, lcp.lcp_timeout,
    368 		    timeout.idle_seconds, authfailstats.auth_failures,
    369 		    authfailstats.max_failures,
    370 		    keepalivesettings.maxalive,
    371 		    keepalivesettings.max_noreceive,
    372 		    keepalivesettings.alive_interval,
    373 		    ncp.ncp_flags);
    374 	}
    375 
    376 	return 0;
    377 }
    378 
    379 static void
    380 pppoectl_argument(char *arg)
    381 {
    382 	size_t off;
    383 	const char *cp;
    384 
    385 #define startswith(a,s) strncmp(a, s, (off = strlen(s))) == 0
    386 	if (startswith(arg, "authproto=")) {
    387 		cp = arg + off;
    388 		if (strcmp(cp, "pap") == 0)
    389 			spr.myauth =
    390 				spr.hisauth = SPPP_AUTHPROTO_PAP;
    391 		else if (strcmp(cp, "chap") == 0)
    392 			spr.myauth = spr.hisauth = SPPP_AUTHPROTO_CHAP;
    393 		else if (strcmp(cp, "none") == 0)
    394 			spr.myauth = spr.hisauth = SPPP_AUTHPROTO_NONE;
    395 		else
    396 			errx(EX_DATAERR, "bad auth proto: %s", cp);
    397 		set_auth = 1;
    398 	} else if (startswith(arg, "myauthproto=")) {
    399 		cp = arg + off;
    400 		if (strcmp(cp, "pap") == 0)
    401 			spr.myauth = SPPP_AUTHPROTO_PAP;
    402 		else if (strcmp(cp, "chap") == 0)
    403 			spr.myauth = SPPP_AUTHPROTO_CHAP;
    404 		else if (strcmp(cp, "none") == 0)
    405 			spr.myauth = SPPP_AUTHPROTO_NONE;
    406 		else
    407 			errx(EX_DATAERR, "bad auth proto: %s", cp);
    408 		set_auth = 1;
    409 	} else if (startswith(arg, "myauthname=")) {
    410 		spr.myname = arg + off;
    411 		spr.myname_length = strlen(spr.myname)+1;
    412 		set_auth = 1;
    413 	} else if (startswith(arg, "myauthsecret=") || startswith(arg, "myauthkey=")) {
    414 		spr.mysecret = arg + off;
    415 		spr.mysecret_length = strlen(spr.mysecret)+1;
    416 		set_auth = 1;
    417 	} else if (startswith(arg, "hisauthproto=")) {
    418 		cp = arg + off;
    419 		if (strcmp(cp, "pap") == 0)
    420 			spr.hisauth = SPPP_AUTHPROTO_PAP;
    421 		else if (strcmp(cp, "chap") == 0)
    422 			spr.hisauth = SPPP_AUTHPROTO_CHAP;
    423 		else if (strcmp(cp, "none") == 0)
    424 			spr.hisauth = SPPP_AUTHPROTO_NONE;
    425 		else
    426 			errx(EX_DATAERR, "bad auth proto: %s", cp);
    427 		set_auth = 1;
    428 	} else if (startswith(arg, "hisauthname=")) {
    429 		spr.hisname = arg + off;
    430 		spr.hisname_length = strlen(spr.hisname)+1;
    431 		set_auth = 1;
    432 	} else if (startswith(arg, "hisauthsecret=") || startswith(arg, "hisauthkey=")) {
    433 		spr.hissecret = arg + off;
    434 		spr.hissecret_length = strlen(spr.hissecret)+1;
    435 		set_auth = 1;
    436 	} else if (startswith(arg, "max-noreceive=")) {
    437 		max_noreceive = atoi(arg+off);
    438 		if (max_noreceive < 0) {
    439 			fprintf(stderr,
    440 			    "max-noreceive value must be at least 0\n");
    441 			max_noreceive = -1;
    442 		} else {
    443 			set_keepalive = 1;
    444 		}
    445 	} else if (startswith(arg, "max-alive-missed=")) {
    446 		maxalive = atoi(arg+off);
    447 		if (maxalive < 0) {
    448 			fprintf(stderr,
    449 			    "max-alive-missed value must be at least 0\n");
    450 			maxalive = -1;
    451 		} else {
    452 			set_keepalive = 1;
    453 		}
    454 	} else if (startswith(arg, "alive-interval=")) {
    455 		alive_intval = atoi(arg+off);
    456 		if (alive_intval < 0) {
    457 			fprintf(stderr,
    458 			    "alive-interval value must be at least 0\n");
    459 			alive_intval = -1;
    460 		} else {
    461 			set_keepalive = 1;
    462 		}
    463 	} else if (strcmp(arg, "callin") == 0)
    464 		spr.hisauthflags |= SPPP_AUTHFLAG_NOCALLOUT;
    465 	else if (strcmp(arg, "always") == 0)
    466 		spr.hisauthflags &= ~SPPP_AUTHFLAG_NOCALLOUT;
    467 	else if (strcmp(arg, "norechallenge") == 0)
    468 		spr.hisauthflags |= SPPP_AUTHFLAG_NORECHALLENGE;
    469 	else if (strcmp(arg, "rechallenge") == 0)
    470 		spr.hisauthflags &= ~SPPP_AUTHFLAG_NORECHALLENGE;
    471 	else if (strcmp(arg, "passiveauthproto") == 0)
    472 		spr.myauthflags |= SPPP_AUTHFLAG_PASSIVEAUTHPROTO;
    473 #ifndef __NetBSD__
    474 	else if (strcmp(arg, "enable-vj") == 0)
    475 		spr.defs.enable_vj = 1;
    476 	else if (strcmp(arg, "disable-vj") == 0)
    477 		spr.defs.enable_vj = 0;
    478 #endif
    479 	else if (startswith(arg, "lcp-timeout=")) {
    480 		int timeout_arg = atoi(arg+off);
    481 		if ((timeout_arg > 20000) || (timeout_arg <= 0))
    482 			errx(EX_DATAERR, "bad lcp timeout value: %s",
    483 			     arg+off);
    484 		lcp.lcp_timeout = timeout_arg * hz / 1000;
    485 		set_lcp = 1;
    486 	} else if (startswith(arg, "idle-timeout=")) {
    487 		timeout.idle_seconds = (time_t)atol(arg+off);
    488 		set_idle_to = 1;
    489 	} else if (startswith(arg, "max-auth-failure=")) {
    490 		authfailset.max_failures = atoi(arg+off);
    491 		set_auth_failure = 1;
    492 	} else if (strcmp(arg, "clear-auth-failure") == 0) {
    493 		clear_auth_failure_count = 1;
    494 	} else if (startswith(arg, "query-dns=")) {
    495 		dnssettings.query_dns = atoi(arg+off);
    496 		set_dns = 1;
    497 	} else if (strcmp(arg, "ipcp") == 0) {
    498 		set_ncpflags |= SPPP_NCP_IPCP;
    499 		clr_ncpflags &= ~SPPP_NCP_IPCP;
    500 	} else if (strcmp(arg, "noipcp") == 0) {
    501 		set_ncpflags &= ~SPPP_NCP_IPCP;
    502 		clr_ncpflags |= SPPP_NCP_IPCP;
    503 	} else if (strcmp(arg, "ipv6cp") == 0) {
    504 		set_ncpflags |= SPPP_NCP_IPV6CP;
    505 		clr_ncpflags &= ~SPPP_NCP_IPV6CP;
    506 	} else if (strcmp(arg, "noipv6cp") == 0) {
    507 		set_ncpflags &= ~SPPP_NCP_IPV6CP;
    508 		clr_ncpflags |= SPPP_NCP_IPV6CP;
    509 	} else
    510 		errx(EX_DATAERR, "bad parameter: \"%s\"", arg);
    511 }
    512 
    513 static void
    514 usage(void)
    515 {
    516 	const char * prog = getprogname();
    517 	fprintf(stderr,
    518 	    "usage:\n"
    519 	    "       %s [-f config] ifname [...]\n"
    520 	    "       %s [-v] ifname [{my|his}auth{proto|name|secret}=...] \\\n"
    521             "                      [callin] [always] [{no}rechallenge]\n"
    522             "                      [query-dns=3] [{no}ipcp] [{no}ipv6cp]\n"
    523 	    "           to set authentication names, passwords\n"
    524 	    "           and (optional) parameters\n"
    525 	    "       %s [-v] ifname lcp-timeout=ms|idle-timeout=s|\n"
    526 	    "                      max-noreceive=s|max-alive-missed=cnt|\n"
    527 	    "                      max-auth-failure=count|clear-auth-failure\n"
    528 	    "           to set general parameters\n"
    529 	    "   or\n"
    530 	    "       %s -e ethernet-ifname ifname\n"
    531 	    "           to connect an ethernet interface for PPPoE\n"
    532 	    "       %s [-a access-concentrator-name] [-s service-name] ifname\n"
    533 	    "           to specify (optional) data for PPPoE sessions\n"
    534 	    "       %s -d ifname\n"
    535 	    "           to dump the current PPPoE session state\n"
    536 	    "       %s -n (1|2) ifname\n"
    537 	    "           to print DNS addresses retrieved via query-dns\n"
    538 	    , prog, prog, prog, prog, prog, prog, prog);
    539 	exit(EX_USAGE);
    540 }
    541 
    542 static void
    543 print_vals(const char *ifname, int phase, struct spppauthcfg *sp, int lcp_timeout,
    544 	time_t idle_timeout, int authfailures, int max_auth_failures,
    545 	u_int maxalive_cnt, time_t max_noreceive_time, u_int alive_interval,
    546 	int ncp_flags)
    547 {
    548 #ifndef __NetBSD__
    549 	time_t send, recv;
    550 #endif
    551 
    552 	printf("%s:\tphase=%s\n", ifname, phase_name(phase));
    553 	if (sp->myauth) {
    554 		printf("\tmyauthproto=%s myauthname=\"%s\"\n",
    555 		       proto_name(sp->myauth),
    556 		       sp->myname);
    557 	}
    558 	if (sp->hisauth) {
    559 		printf("\thisauthproto=%s hisauthname=\"%s\"%s\n",
    560 		       proto_name(sp->hisauth),
    561 		       sp->hisname,
    562 		       authflags(sp->hisauthflags));
    563 	}
    564 #ifndef __NetBSD__
    565 	if (sp->defs.pp_phase > PHASE_DEAD) {
    566 		send = time(NULL) - sp->defs.pp_last_sent;
    567 		recv = time(NULL) - sp->defs.pp_last_recv;
    568 		printf("\tidle_time=%ld\n", (send<recv)? send : recv);
    569 	}
    570 #endif
    571 
    572 	printf("\tlcp timeout: %.3f s\n",
    573 	       (double)lcp_timeout / hz);
    574 
    575 	if (idle_timeout != 0)
    576 		printf("\tidle timeout = %lu s\n", (unsigned long)idle_timeout);
    577 	else
    578 		printf("\tidle timeout = disabled\n");
    579 
    580 	if (authfailures != 0)
    581 		printf("\tauthentication failures = %d\n", authfailures);
    582 	printf("\tmax-auth-failure = %d\n", max_auth_failures);
    583 
    584 	printf("\tmax-noreceive = %ld seconds\n", (long)max_noreceive_time);
    585 	printf("\tmax-alive-missed = %u unanswered echo requests\n", maxalive_cnt);
    586 	printf("\talive-interval = %u\n", alive_interval);
    587 
    588 #ifndef __NetBSD__
    589 	printf("\tenable_vj: %s\n",
    590 	       sp->defs.enable_vj ? "on" : "off");
    591 #endif
    592 
    593 	printf("\tipcp: %s\n",
    594 	    ncp_flags & SPPP_NCP_IPCP ? "enable" : "disable");
    595 	printf("\tipv6cp: %s\n",
    596 	    ncp_flags & SPPP_NCP_IPV6CP ? "enable" : "disable");
    597 }
    598 
    599 static void
    600 print_dns(const char *ifname, int dns1, int dns2, int s, int tabs)
    601 {
    602 	int i;
    603 	struct spppdnsaddrs addrs;
    604 
    605 	if (!dns1 && !dns2)
    606 		return;
    607 
    608 	PPPOECTL_IOCTL(ifname, s, SPPPGETDNSADDRS, &addrs);
    609 	if (dns1) {
    610 		for (i = 0; i < tabs; i++)
    611 			printf("\t");
    612 		if (tabs > 0)
    613 			printf("primary dns address ");
    614 		printf("%d.%d.%d.%d\n",
    615 		       (addrs.dns[0] >> 24) & 0xff,
    616 		       (addrs.dns[0] >> 16) & 0xff,
    617 		       (addrs.dns[0] >> 8) & 0xff,
    618 		       addrs.dns[0] & 0xff);
    619 	}
    620 	if (dns2) {
    621 		for (i = 0; i < tabs; i++)
    622 			printf("\t");
    623 		if (tabs > 0)
    624 			printf("secondary dns address ");
    625 		printf("%d.%d.%d.%d\n",
    626 		       (addrs.dns[1] >> 24) & 0xff,
    627 		       (addrs.dns[1] >> 16) & 0xff,
    628 		       (addrs.dns[1] >> 8) & 0xff,
    629 		       addrs.dns[1] & 0xff);
    630 	}
    631 }
    632 
    633 static void
    634 print_stats(const char *ifname, int s, int dump)
    635 {
    636 	struct pppoeconnectionstate state;
    637 	struct sppplcpstatus lcpst;
    638 	struct spppipcpstatus ipcpst;
    639 	struct spppipv6cpstatus ipv6cpst;
    640 	struct in_addr addr;
    641 
    642 	PPPOECTL_IOCTL(ifname, s, PPPOEGETSESSION, &state);
    643 
    644 	/* dump PPPoE session state */
    645 	printf("%s:\t%s %s\n", ifname,
    646 	    dump > 1 ? "PPPoE state:" : "state =",
    647 	    pppoe_state_name(state.state));
    648 	printf("\tSession ID: 0x%x\n", state.session_id);
    649 	printf("\tPADI retries: %d\n", state.padi_retry_no);
    650 	printf("\tPADR retries: %d\n", state.padr_retry_no);
    651 
    652 	if (dump > 1) {
    653 		PPPOECTL_IOCTL(ifname, s, SPPPGETLCPSTATUS, &lcpst);
    654 		PPPOECTL_IOCTL(ifname, s, SPPPGETIPCPSTATUS, &ipcpst);
    655 		PPPOECTL_IOCTL(ifname, s, SPPPGETIPV6CPSTATUS, &ipv6cpst);
    656 
    657 		printf("\tLCP state: %s\n",
    658 		    ppp_state_name(lcpst.state));
    659 		printf("\tIPCP state: %s\n",
    660 		    ppp_state_name(ipcpst.state));
    661 		printf("\tIPv6CP state: %s\n",
    662 		    ppp_state_name(ipv6cpst.state));
    663 
    664 		if (lcpst.state == SPPP_STATE_OPENED) {
    665 			printf("\tLCP negotiated options:\n");
    666 			printf("\t\tmru %lu\n", lcpst.mru);
    667 			printf("\t\tmagic number 0x%lx\n",
    668 			    lcpst.magic);
    669 		}
    670 
    671 		if (ipcpst.state == SPPP_STATE_OPENED) {
    672 			addr.s_addr = ipcpst.myaddr;
    673 
    674 			printf("\tIPCP negotiated options:\n");
    675 			printf("\t\taddress %s\n", inet_ntoa(addr));
    676 			print_dns(ifname,
    677 			    ISSET(ipcpst.opts, SPPP_IPCP_OPT_PRIMDNS),
    678 			    ISSET(ipcpst.opts, SPPP_IPCP_OPT_SECDNS),
    679 			    s, 2);
    680 		}
    681 
    682 		if (ipv6cpst.state == SPPP_STATE_OPENED) {
    683 			printf("\tIPv6CP negotiated options:\n");
    684 			if (ISSET(ipv6cpst.opts, SPPP_IPV6CP_OPT_COMPRESSION))
    685 				printf("\t\tcompression\n");
    686 			if (ISSET(ipv6cpst.opts, SPPP_IPV6CP_OPT_IFID)) {
    687 				printf("\t\tifid: "
    688 				    "my_ifid=0x%02x%02x%02x%02x%02x%02x%02x%02x, "
    689 				    "his_ifid=0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
    690 				ipv6cpst.my_ifid[0], ipv6cpst.my_ifid[1],
    691 				ipv6cpst.my_ifid[2], ipv6cpst.my_ifid[3],
    692 				ipv6cpst.my_ifid[4], ipv6cpst.my_ifid[5],
    693 				ipv6cpst.my_ifid[6], ipv6cpst.my_ifid[7],
    694 				ipv6cpst.his_ifid[0], ipv6cpst.his_ifid[1],
    695 				ipv6cpst.his_ifid[2], ipv6cpst.his_ifid[3],
    696 				ipv6cpst.his_ifid[4], ipv6cpst.his_ifid[5],
    697 				ipv6cpst.his_ifid[6], ipv6cpst.his_ifid[7]);
    698 			}
    699 		}
    700 	}
    701 }
    702 
    703 static const char *
    704 phase_name(int phase)
    705 {
    706 	switch (phase) {
    707 	case SPPP_PHASE_DEAD:		return "dead";
    708 	case SPPP_PHASE_ESTABLISH:	return "establish";
    709 	case SPPP_PHASE_TERMINATE:	return "terminate";
    710 	case SPPP_PHASE_AUTHENTICATE:	return "authenticate";
    711 	case SPPP_PHASE_NETWORK:	return "network";
    712 	}
    713 	return "illegal";
    714 }
    715 
    716 static const char *
    717 proto_name(int proto)
    718 {
    719 	static char buf[12];
    720 	switch (proto) {
    721 	case SPPP_AUTHPROTO_PAP:	return "pap";
    722 	case SPPP_AUTHPROTO_CHAP:	return "chap";
    723 	case SPPP_AUTHPROTO_NONE:	return "none";
    724 	}
    725 	snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto);
    726 	return buf;
    727 }
    728 
    729 static const char *
    730 authflags(int flags)
    731 {
    732 	static char buf[32];
    733 	buf[0] = '\0';
    734 	if (flags & SPPP_AUTHFLAG_NOCALLOUT)
    735 		strlcat(buf, " callin", sizeof(buf));
    736 	if (flags & SPPP_AUTHFLAG_NORECHALLENGE)
    737 		strlcat(buf, " norechallenge", sizeof(buf));
    738 	return buf;
    739 }
    740 
    741 static const char *
    742 pppoe_state_name(int state)
    743 {
    744 
    745 	switch(state) {
    746 	case PPPOE_STATE_INITIAL:
    747 		return "initial";
    748 	case PPPOE_STATE_PADI_SENT:
    749 		return "PADI sent";
    750 	case PPPOE_STATE_PADR_SENT:
    751 		return "PADR sent";
    752 	case PPPOE_STATE_SESSION:
    753 		return "session";
    754 	case PPPOE_STATE_CLOSING:
    755 		return "closing";
    756 	}
    757 
    758 	return "unknown";
    759 }
    760 static const char *
    761 ppp_state_name(int state)
    762 {
    763 
    764 	switch (state) {
    765 	case SPPP_STATE_INITIAL:	return "initial";
    766 	case SPPP_STATE_STARTING:	return "starting";
    767 	case SPPP_STATE_CLOSED:		return "closed";
    768 	case SPPP_STATE_STOPPED:	return "stopped";
    769 	case SPPP_STATE_CLOSING:	return "closing";
    770 	case SPPP_STATE_STOPPING:	return "stopping";
    771 	case SPPP_STATE_REQ_SENT:	return "req-sent";
    772 	case SPPP_STATE_ACK_RCVD:	return "ack-rcvd";
    773 	case SPPP_STATE_ACK_SENT:	return "ack-sent";
    774 	case SPPP_STATE_OPENED:		return "opened";
    775 	}
    776 
    777 	return "unknown";
    778 }
    779 
    780 static void
    781 print_error(const char *ifname, int error, const char * str)
    782 {
    783 	if (error == -1)
    784 		fprintf(stderr, "%s: interface not found\n", ifname);
    785 	else
    786 		fprintf(stderr, "%s: %s: %s\n", ifname, str, strerror(error));
    787 	exit(EX_DATAERR);
    788 }
    789