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/*

 * options.c - handles option processing for PPP.

 *

 * Copyright (c) 1989 Carnegie Mellon University.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms are permitted

 * provided that the above copyright notice and this paragraph are

 * duplicated in all such forms and that any documentation,

 * advertising materials, and other materials related to such

 * distribution and use acknowledge that the software was developed

 * by Carnegie Mellon University.  The name of the

 * University may not be used to endorse or promote products derived

 * from this software without specific prior written permission.

 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED

 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.

 */

#ifndef lint

/* static char rcsid[] = "$Id: options.c,v 1.2 2001-09-27 12:01:57 chris Exp $"; */

#endif

#include <ctype.h>

#include <stdio.h>

#include <errno.h>

#include <unistd.h>

#include <limits.h>

/* #include <stdlib.h> */

#include <termios.h>

#include <syslog.h>

#include <string.h>

#include <netdb.h>

#include <pwd.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#ifdef PPP_FILTER

#include <pcap.h>

#include <pcap-int.h>   /* XXX: To get struct pcap */

#endif

#include "pppd.h"

#include "pathnames.h"

#include "patchlevel.h"

#include "fsm.h"

#include "lcp.h"

#include "ipcp.h"

#include "upap.h"

#include "chap.h"

#include "ccp.h"

#ifdef CBCP_SUPPORT

#include "cbcp.h"

#endif

#ifdef IPX_CHANGE

#include "ipxcp.h"

#endif /* IPX_CHANGE */

#include <net/ppp-comp.h>

#define FALSE   0

#define TRUE    1

#ifndef GIDSET_TYPE

#define GIDSET_TYPE     gid_t

#endif

#if 0

static int privileged_option;   /* set iff the current option came from root */

static char *option_source;     /* string saying where the option came from */

#endif

/*

 * Option variables and default values.

 */

#ifdef PPP_FILTER

int     dflag = 0;               /* Tell libpcap we want debugging */

#endif

int     debug = 1;              /* Debug flag */

int     kdebugflag = 1;         /* Tell kernel to print debug messages */

int     default_device = 1;     /* Using /dev/tty or equivalent */

char    devnam[MAXPATHLEN] = "/dev/sccppp";     /* Device name */

int     crtscts = 0;             /* Use hardware flow control */

int     modem = 0;               /* Use modem control lines */

int     inspeed = B115200;              /* Input/Output speed requested */

u_int32_t netmask = 0;           /* IP netmask to set on interface */

int     lockflag = 0;            /* Create lock file to lock the serial dev */

int     nodetach = 0;            /* Don't detach from controlling tty */

char *connector[]={"TIMEOUT","3","ABORT","\nBUSY\r","ABORT","\nNO DIALTONE\r","ABORT","\nNO CARRIER\r","ABORT","\nNO ANSWER\r","ABORT","\nRINGING\r\n\r\nRINGING\r",

                                                                                                "","\rAT","OK-+++\\c-OK","ATH0","TIMEOUT","30","OK","ATDT13","CONNECT",""};

/*char *connector[]={"TIMEOUT","3","ABORT","\nBUSY\r","ABORT","\nNO DIALTONE\r","ABORT","\nNO CARRIER\r","ABORT","\nNO ANSWER\r","ABORT","\nRINGING\r\n\r\nRINGING\r",

                                                                                                "","\rAT","OK-+++\\c-OK","ATH0","TIMEOUT","30","OK","ATDT0202122","CONNECT","","ppp","","Username:","ppp","Password:","ppp"};

*/

char    **disconnector; /* Script to disestablish physical link */

char    **welcomer;     /* Script to run after phys link estab. */

int     maxconnect = 0;          /* Maximum connect time */

char    user[MAXNAMELEN]="stb"; /* Username for PAP */

char    passwd[MAXSECRETLEN]="stb";     /* Password for PAP */

int     auth_required = 0;       /* Peer is required to authenticate */

int     defaultroute = 1;       /* assign default route through interface */

int     proxyarp = 0;            /* Set up proxy ARP entry for peer */

int     persist = 1;            /* Reopen link after it goes down */

int     uselogin = 0;            /* Use /etc/passwd for checking PAP */

int     lcp_echo_interval = 0;   /* Interval between LCP echo-requests */

int     lcp_echo_fails = 0;      /* Tolerance to unanswered echo-requests */

char    our_name[MAXNAMELEN]="infotel"; /* Our name for authentication purposes */

char    remote_name[MAXNAMELEN]; /* Peer's name for authentication */

int     explicit_remote = 0;     /* User specified explicit remote name */

int     usehostname = 0; /* Use hostname for our_name */

int     disable_defaultip = 1;  /* Don't use hostname for default IP adrs */

int     demand = 0;              /* do dial-on-demand */

char    *ipparam = NULL;        /* Extra parameter for ip up/down scripts */

int     cryptpap;               /* Passwords in pap-secrets are encrypted */

int     idle_time_limit = 0;     /* Disconnect if idle for this many seconds */

int     holdoff = 30;           /* # seconds to pause before reconnecting */

int     refuse_pap = 0;          /* Set to say we won't do PAP */

int     refuse_chap = 1;        /* Set to say we won't do CHAP */

#ifdef MSLANMAN

int     ms_lanman = 0;           /* Nonzero if use LanMan password instead of NT */

                                /* Has meaning only with MS-CHAP challenges */

#endif

struct option_info auth_req_info;

struct option_info connector_info;

struct option_info disconnector_info;

struct option_info welcomer_info;

struct option_info devnam_info;

#ifdef PPP_FILTER

struct  bpf_program pass_filter;/* Filter program for packets to pass */

struct  bpf_program active_filter; /* Filter program for link-active pkts */

pcap_t  pc;                     /* Fake struct pcap so we can compile expr */

#endif

/*

 * Prototypes

 */

#if 0

static int setdevname __P((char *, int));

static int setipaddr __P((char *));

static int setspeed __P((char *));

static int setdebug __P((char **));

static int setkdebug __P((char **));

static int setpassive __P((char **));

static int setsilent __P((char **));

static int noopt __P((char **));

static int setnovj __P((char **));

static int setnovjccomp __P((char **));

static int setvjslots __P((char **));

static int reqpap __P((char **));

static int nopap __P((char **));

#ifdef OLD_OPTIONS

static int setupapfile __P((char **));

#endif

static int nochap __P((char **));

static int reqchap __P((char **));

static int noaccomp __P((char **));

static int noasyncmap __P((char **));

static int noip __P((char **));

static int nomagicnumber __P((char **));

static int setasyncmap __P((char **));

static int setescape __P((char **));

static int setmru __P((char **));

static int setmtu __P((char **));

#ifdef CBCP_SUPPORT

static int setcbcp __P((char **));

#endif

static int nomru __P((char **));

static int nopcomp __P((char **));

static int setconnector __P((char **));

static int setdisconnector __P((char **));

static int setwelcomer __P((char **));

static int setmaxconnect __P((char **));

static int setdomain __P((char **));

static int setnetmask __P((char **));

static int setcrtscts __P((char **));

static int setnocrtscts __P((char **));

static int setxonxoff __P((char **));

static int setnodetach __P((char **));

static int setupdetach __P((char **));

static int setmodem __P((char **));

static int setlocal __P((char **));

static int setlock __P((char **));

static int setname __P((char **));

static int setuser __P((char **));

static int setremote __P((char **));

static int setauth __P((char **));

static int setnoauth __P((char **));

static int readfile __P((char **));

static int callfile __P((char **));

static int setdefaultroute __P((char **));

static int setnodefaultroute __P((char **));

static int setproxyarp __P((char **));

static int setnoproxyarp __P((char **));

static int setpersist __P((char **));

static int setnopersist __P((char **));

static int setdologin __P((char **));

static int setusehostname __P((char **));

static int setnoipdflt __P((char **));

static int setlcptimeout __P((char **));

static int setlcpterm __P((char **));

static int setlcpconf __P((char **));

static int setlcpfails __P((char **));

static int setipcptimeout __P((char **));

static int setipcpterm __P((char **));

static int setipcpconf __P((char **));

static int setipcpfails __P((char **));

static int setpaptimeout __P((char **));

static int setpapreqs __P((char **));

static int setpapreqtime __P((char **));

static int setchaptimeout __P((char **));

static int setchapchal __P((char **));

static int setchapintv __P((char **));

static int setipcpaccl __P((char **));

static int setipcpaccr __P((char **));

static int setlcpechointv __P((char **));

static int setlcpechofails __P((char **));

static int noccp __P((char **));

static int setbsdcomp __P((char **));

static int setnobsdcomp __P((char **));

static int setdeflate __P((char **));

static int setnodeflate __P((char **));

static int setnodeflatedraft __P((char **));

static int setdemand __P((char **));

static int setpred1comp __P((char **));

static int setnopred1comp __P((char **));

static int setipparam __P((char **));

static int setpapcrypt __P((char **));

static int setidle __P((char **));

static int setholdoff __P((char **));

static int setdnsaddr __P((char **));

static int resetipxproto __P((char **));

static int setwinsaddr __P((char **));

static int showversion __P((char **));

static int showhelp __P((char **));

#ifdef PPP_FILTER

static int setpdebug __P((char **));

static int setpassfilter __P((char **));

static int setactivefilter __P((char **));

#endif

#ifdef IPX_CHANGE

static int setipxproto __P((char **));

static int setipxanet __P((char **));

static int setipxalcl __P((char **));

static int setipxarmt __P((char **));

static int setipxnetwork __P((char **));

static int setipxnode __P((char **));

static int setipxrouter __P((char **));

static int setipxname __P((char **));

static int setipxcptimeout __P((char **));

static int setipxcpterm __P((char **));

static int setipxcpconf __P((char **));

static int setipxcpfails __P((char **));

#endif /* IPX_CHANGE */

#ifdef MSLANMAN

static int setmslanman __P((char **));

#endif

static int number_option __P((char *, u_int32_t *, int));

static int int_option __P((char *, int *));

static int readable __P((int fd));

#endif

/*

 * Valid arguments.

 */

/*

 * parse_args - parse a string of arguments from the command line.

 */

int

parse_args(argc, argv)

    int argc;

    char **argv;

{

return 0;

}

/*

 * scan_args - scan the command line arguments to get the tty name,

 * if specified.

 */

/*

 * usage - print out a message telling how to use the program.

 */

void

usage()

{

 }

/*

 * showhelp - print out usage message and exit.

 */

static int

showhelp(argv)

    char **argv;

{

    return 0;

}

/*

 * showversion - print out the version number and exit.

 */

static int

showversion(argv)

    char **argv;

{

    return 0;

}

void

option_error __V((char *fmt, ...))

{

}

/*

 * readable - check if a file is readable by the real user.

 */

/*static int

readable(fd)

    int fd;

{

    uid_t uid;

    int ngroups, i;

    struct stat sbuf;

    GIDSET_TYPE groups[NGROUPS_MAX];

    uid = getuid();

    if (uid == 0)

        return 1;

    if (fstat(fd, &sbuf) != 0)

        return 0;

    if (sbuf.st_uid == uid)

        return sbuf.st_mode & S_IRUSR;

    if (sbuf.st_gid == getgid())

        return sbuf.st_mode & S_IRGRP;

    ngroups = getgroups(NGROUPS_MAX, groups);

    for (i = 0; i < ngroups; ++i)

        if (sbuf.st_gid == groups[i])

            return sbuf.st_mode & S_IRGRP;

    return sbuf.st_mode & S_IROTH;

}

*/

/*

 * Read a word from a file.

 * Words are delimited by white-space or by quotes (" or ').

 * Quotes, white-space and \ may be escaped with \.

 * \<newline> is ignored.

 */

 /*

 * The following procedures parse options.

 */

/*

 * readfile - take commands from a file.

 */

/*

 * callfile - take commands from /etc/ppp/peers/<name>.

 * Name may not contain /../, start with / or ../, or end in /..

 */

 /*

 * setdebug - Set debug (command line argument).

 */

/*

 * noopt - Disable all options.

 */

static int

noopt(argv)

    char **argv;

{

    BZERO((char *) &lcp_wantoptions[0], sizeof (struct lcp_options));

    BZERO((char *) &lcp_allowoptions[0], sizeof (struct lcp_options));

    BZERO((char *) &ipcp_wantoptions[0], sizeof (struct ipcp_options));

    BZERO((char *) &ipcp_allowoptions[0], sizeof (struct ipcp_options));

#ifdef IPX_CHANGE

    BZERO((char *) &ipxcp_wantoptions[0], sizeof (struct ipxcp_options));

    BZERO((char *) &ipxcp_allowoptions[0], sizeof (struct ipxcp_options));

#endif /* IPX_CHANGE */

    return (1);

}