/*
 * Copyright (c) 1997 Joerg Wunsch
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * From: spppcontrol.c,v 1.3 1998/01/07 07:55:26 charnier Exp
 *
 *---------------------------------------------------------------------------
 *
 *	last edit-date: [Fri May 12 16:34:01 2000]
 *
 *---------------------------------------------------------------------------
 */

#ifndef lint
static const char rcsid[] =
	"$Id: ispppcontrol.c,v 1.1.1.1 2001/01/06 13:00:11 martin Exp $";
#endif /* not lint */

#include <sys/param.h>
#include <sys/callout.h>
#include <sys/ioctl.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/sysctl.h>

#include <net/if.h>

#if (defined (__FreeBSD__) && __FreeBSD__ >= 3)
#include <net/if_var.h>
#endif

#if defined (__FreeBSD__) || defined (__OpenBSD__)
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <net/slcompress.h>
#endif

#ifdef __NetBSD__
#include <net/if_sppp.h>
#else
#include <machine/i4b_isppp.h>
#endif

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>

static void usage(void);
void	print_vals(const char *ifname, struct spppreq *sp);
const char *phase_name(enum ppp_phase phase);
const char *proto_name(u_short proto);
const char *authflags(u_short flags);

#define PPP_PAP		0xc023
#define PPP_CHAP	0xc223

int hz = 0;

int
main(int argc, char **argv)
{
	int s, c;
	int errs = 0, verbose = 0;
	size_t off, len;
	const char *ifname, *cp;
	struct ifreq ifr;
	struct spppreq spr;
	int mib[2];
	struct clockinfo clockinfo;
	
	while ((c = getopt(argc, argv, "v")) != -1)
		switch (c) {
		case 'v':
			verbose++;
			break;

		default:
			errs++;
			break;
		}
	argv += optind;
	argc -= optind;

	if (errs || argc < 1)
		usage();

	ifname = argv[0];
	strncpy(ifr.ifr_name, ifname, sizeof ifr.ifr_name);

	/* use a random AF to create the socket */
	if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
		err(EX_UNAVAILABLE, "ifconfig: socket");

	argc--;
	argv++;

	spr.cmd = (int)SPPPIOGDEFS;
	ifr.ifr_data = (caddr_t)&spr;

	if (ioctl(s, SIOCGIFGENERIC, &ifr) == -1)
		err(EX_OSERR, "SIOCGIFGENERIC(SPPPIOGDEFS)");

	mib[0] = CTL_KERN;
	mib[1] = KERN_CLOCKRATE;
	len = sizeof(clockinfo);
	if(sysctl(mib, 2, &clockinfo, &len, NULL, 0) == -1)
	{
		fprintf(stderr, "error, cannot sysctl kern.clockrate!\n");
		exit(1);
	}

	hz = clockinfo.hz;
		
	if (argc == 0) {
		/* list only mode */
		print_vals(ifname, &spr);
		return 0;
	}
                                
#define startswith(s) strncmp(argv[0], s, (off = strlen(s))) == 0

	while (argc > 0) {
		if (startswith("authproto=")) {
			cp = argv[0] + off;
			if (strcmp(cp, "pap") == 0)
				spr.defs.myauth.proto =
					spr.defs.hisauth.proto = PPP_PAP;
			else if (strcmp(cp, "chap") == 0)
				spr.defs.myauth.proto =
					spr.defs.hisauth.proto = PPP_CHAP;
			else if (strcmp(cp, "none") == 0)
				spr.defs.myauth.proto =
					spr.defs.hisauth.proto = 0;
			else
				errx(EX_DATAERR, "bad auth proto: %s", cp);
		} else if (startswith("myauthproto=")) {
			cp = argv[0] + off;
			if (strcmp(cp, "pap") == 0)
				spr.defs.myauth.proto = PPP_PAP;
			else if (strcmp(cp, "chap") == 0)
				spr.defs.myauth.proto = PPP_CHAP;
			else if (strcmp(cp, "none") == 0)
				spr.defs.myauth.proto = 0;
			else
				errx(EX_DATAERR, "bad auth proto: %s", cp);
		} else if (startswith("myauthname="))
			strncpy(spr.defs.myauth.name, argv[0] + off,
				AUTHNAMELEN);
		else if (startswith("myauthsecret=") ||
			 startswith("myauthkey="))
			strncpy(spr.defs.myauth.secret, argv[0] + off,
				AUTHKEYLEN);
		else if (startswith("hisauthproto=")) {
			cp = argv[0] + off;
			if (strcmp(cp, "pap") == 0)
				spr.defs.hisauth.proto = PPP_PAP;
			else if (strcmp(cp, "chap") == 0)
				spr.defs.hisauth.proto = PPP_CHAP;
			else if (strcmp(cp, "none") == 0)
				spr.defs.hisauth.proto = 0;
			else
				errx(EX_DATAERR, "bad auth proto: %s", cp);
		} else if (startswith("hisauthname="))
			strncpy(spr.defs.hisauth.name, argv[0] + off,
				AUTHNAMELEN);
		else if (startswith("hisauthsecret=") ||
			 startswith("hisauthkey="))
			strncpy(spr.defs.hisauth.secret, argv[0] + off,
				AUTHKEYLEN);
		else if (strcmp(argv[0], "callin") == 0)
			spr.defs.hisauth.flags |= AUTHFLAG_NOCALLOUT;
		else if (strcmp(argv[0], "always") == 0)
			spr.defs.hisauth.flags &= ~AUTHFLAG_NOCALLOUT;
		else if (strcmp(argv[0], "norechallenge") == 0)
			spr.defs.hisauth.flags |= AUTHFLAG_NORECHALLENGE;
		else if (strcmp(argv[0], "rechallenge") == 0)
			spr.defs.hisauth.flags &= ~AUTHFLAG_NORECHALLENGE;
#ifndef __NetBSD__
		else if (strcmp(argv[0], "enable-vj") == 0)
			spr.defs.enable_vj = 1;
		else if (strcmp(argv[0], "disable-vj") == 0)
			spr.defs.enable_vj = 0;
#endif
		else if (startswith("lcp-timeout=")) {
			int timeout_arg = atoi(argv[0]+off);
			if ((timeout_arg > 20000) || (timeout_arg <= 0))
				errx(EX_DATAERR, "bad lcp timeout value: %s",
				     argv[0]+off);
			spr.defs.lcp.timeout = timeout_arg * hz / 1000;
		} else
			errx(EX_DATAERR, "bad parameter: \"%s\"", argv[0]);

		argv++;
		argc--;
	}

	spr.cmd = (int)SPPPIOSDEFS;

	if (ioctl(s, SIOCSIFGENERIC, &ifr) == -1)
		err(EX_OSERR, "SIOCSIFGENERIC(SPPPIOSDEFS)");

	if (verbose)
		print_vals(ifname, &spr);

	return 0;
}

static void
usage(void)
{
	fprintf(stderr, "%s\n%s\n",
	"usage: ispppcontrol [-v] ifname [{my|his}auth{proto|name|secret}=...]",
	"       ispppcontrol [-v] ifname callin|always");
	exit(EX_USAGE);
}

void
print_vals(const char *ifname, struct spppreq *sp)
{
#ifndef __NetBSD__
	time_t send, recv;
#endif

	printf("%s:\tphase=%s\n", ifname, phase_name(sp->defs.pp_phase));
	if (sp->defs.myauth.proto) {
		printf("\tmyauthproto=%s myauthname=\"%.*s\"\n",
		       proto_name(sp->defs.myauth.proto),
		       AUTHNAMELEN, sp->defs.myauth.name);
	}
	if (sp->defs.hisauth.proto) {
		printf("\thisauthproto=%s hisauthname=\"%.*s\"%s\n",
		       proto_name(sp->defs.hisauth.proto),
		       AUTHNAMELEN, sp->defs.hisauth.name,
		       authflags(sp->defs.hisauth.flags));
	}
#ifndef __NetBSD__
	if (sp->defs.pp_phase > PHASE_DEAD) {
		send = time(NULL) - sp->defs.pp_last_sent;
		recv = time(NULL) - sp->defs.pp_last_recv;
		printf("\tidle_time=%ld\n", (send<recv)? send : recv);
	}
#endif
	printf("\tlcp timeout: %.3f s\n",
	       (double)sp->defs.lcp.timeout / hz);
#ifndef __NetBSD__
	printf("\tenable_vj: %s\n",
	       sp->defs.enable_vj ? "on" : "off");
#endif
}

const char *
phase_name(enum ppp_phase phase)
{
	switch (phase) {
	case PHASE_DEAD:	return "dead";
	case PHASE_ESTABLISH:	return "establish";
	case PHASE_TERMINATE:	return "terminate";
	case PHASE_AUTHENTICATE: return "authenticate";
	case PHASE_NETWORK:	return "network";
	}
	return "illegal";
}

const char *
proto_name(u_short proto)
{
	static char buf[12];
	switch (proto) {
	case PPP_PAP:	return "pap";
	case PPP_CHAP:	return "chap";
	}
	sprintf(buf, "0x%x", (unsigned)proto);
	return buf;
}

const char *
authflags(u_short flags)
{
	static char buf[32];
	buf[0] = '\0';
	if (flags & AUTHFLAG_NOCALLOUT)
		strcat(buf, " callin");
	if (flags & AUTHFLAG_NORECHALLENGE)
		strcat(buf, " norechallenge");
	return buf;
}