/***************************************************************************
 *  Original Diku Mud copyright (C) 1990, 1991 by Sebastian Hammer,        *
 *  Michael Seifert, Hans Henrik St{rfeldt, Tom Madsen, and Katja Nyboe.   *
 *                                                                         *
 *  Merc Diku vMud improvments copyright (C) 1992, 1993 by Michael          *
 *  Chastain, Michael Quan, and Mitchell Tse.                              *
 *                                                                         *
 *  In order to use any part of this Merc Diku Mud, you must comply with   *
 *  both the original Diku license in 'license.doc' as well the Merc       *
 *  license in 'license.txt'.  In particular, you may not remove either of *
 *  these copyright notices.                                               *
 *                                                                         *
 *  Thanks to abaddon for proof-reading our comm.c and pointing out bugs.  *
 *  Any remaining bugs are, of course, our work, not his.  :)              *
 *                                                                         *
 *  Much time and thought has gone into this software and you are          *
 *  benefitting.  We hope that you share your changes too.  What goes      *
 *  around, comes around.                                                  *
 ***************************************************************************/

/*
 * This file contains all of the OS-dependent stuff:
 *   startup, signals, BSD sockets for tcp/ip, i/o, timing.
 *
 * The data flow for input is:
 *    Game_loop ---> Read_from_descriptor ---> Read
 *    Game_loop ---> Read_from_buffer
 *
 * The data flow for output is:
 *    Game_loop ---> Process_Output ---> Write_to_descriptor -> Write
 *
 * The OS-dependent functions are Read_from_descriptor and Write_to_descriptor.
 * -- Furey  26 Jan 1993
 */

#if defined(macintosh)
#include <types.h>
#else
#include <sys/types.h>
#include <sys/time.h>
#endif

#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>

#include "merc.h"
#include "recycle.h"

/* command procedures needed */
DECLARE_DO_FUN(do_help          );
DECLARE_DO_FUN(do_look          );
DECLARE_DO_FUN(do_skills        );
DECLARE_DO_FUN(do_outfit        );
DECLARE_DO_FUN(do_unread        );


/*
 * Malloc debugging stuff.
 */
#if defined(sun)
#undef MALLOC_DEBUG
#endif

#if defined(MALLOC_DEBUG)
#include <malloc.h>
extern  int     malloc_debug    args( ( int  ) );
extern  int     malloc_verify   args( ( void ) );
#endif



/*
 * Signal handling.
 * Apollo has a problem with __attribute(atomic) in signal.h,
 *   I dance around it.
 */
#if defined(apollo)
#define __attribute(x)
#endif

#if defined(unix)
#include <signal.h>
#endif

#if defined(apollo)
#undef __attribute
#endif



/*
 * Socket and TCP/IP stuff.
 */
#if     defined(macintosh) || defined(MSDOS)
const   char    echo_off_str    [] = { '\0' };
const   char    echo_on_str     [] = { '\0' };
const   char    go_ahead_str    [] = { '\0' };
#endif

#if     defined(unix)
#include <fcntl.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include "telnet.h"
const   char    echo_off_str    [] = { IAC, WILL, TELOPT_ECHO, '\0' };
const   char    echo_on_str     [] = { IAC, WONT, TELOPT_ECHO, '\0' };
const   char    go_ahead_str    [] = { IAC, GA, '\0' };
#endif



/*
 * OS-dependent declarations.
 */
#if     defined(_AIX)
#include <sys/select.h>
int     accept          args( ( int s, struct sockaddr *addr, int *addrlen ) );
int     bind            args( ( int s, struct sockaddr *name, int namelen ) );
void    bzero           args( ( char *b, int length ) );
int     getpeername     args( ( int s, struct sockaddr *name, int *namelen ) );
int     getsockname     args( ( int s, struct sockaddr *name, int *namelen ) );
int     gettimeofday    args( ( struct timeval *tp, struct timezone *tzp ) );
int     listen          args( ( int s, int backlog ) );
int     setsockopt      args( ( int s, int level, int optname, void *optval,
                            int optlen ) );
int     socket          args( ( int domain, int type, int protocol ) );
#endif

#if     defined(apollo)
#include <unistd.h>
void    bzero           args( ( char *b, int length ) );
#endif

#if     defined(__hpux)
int     accept          args( ( int s, void *addr, int *addrlen ) );
int     bind            args( ( int s, const void *addr, int addrlen ) );
void    bzero           args( ( char *b, int length ) );
int     getpeername     args( ( int s, void *addr, int *addrlen ) );
int     getsockname     args( ( int s, void *name, int *addrlen ) );
int     gettimeofday    args( ( struct timeval *tp, struct timezone *tzp ) );
int     listen          args( ( int s, int backlog ) );
int     setsockopt      args( ( int s, int level, int optname,
                                const void *optval, int optlen ) );
int     socket          args( ( int domain, int type, int protocol ) );
#endif

#if     defined(interactive)
#include <net/errno.h>
#include <sys/fnctl.h>
#endif

#if     defined(linux)
int     accept          args( ( int s, struct sockaddr *addr, int *addrlen ) );
int     bind            args( ( int s, struct sockaddr *name, int namelen ) );
int     close           args( ( int fd ) );
int     getpeername     args( ( int s, struct sockaddr *name, int *namelen ) );
int     getsockname     args( ( int s, struct sockaddr *name, int *namelen ) );
int     gettimeofday    args( ( struct timeval *tp, struct timezone *tzp ) );
int     listen          args( ( int s, int backlog ) );
int     read            args( ( int fd, char *buf, int nbyte ) );
int     select          args( ( int width, fd_set *readfds, fd_set *writefds,
                            fd_set *exceptfds, struct timeval *timeout ) );
int     socket          args( ( int domain, int type, int protocol ) );
int     write           args( ( int fd, char *buf, int nbyte ) );
#endif

#if     defined(macintosh)
#include <console.h>
#include <fcntl.h>
#include <unix.h>
struct  timeval
{
        time_t  tv_sec;
        time_t  tv_usec;
};
#if     !defined(isascii)
#define isascii(c)              ( (c) < 0200 )
#endif
static  long                    theKeys [4];

int     gettimeofday            args( ( struct timeval *tp, void *tzp ) );
#endif

#if     defined(MIPS_OS)
extern  int             errno;
#endif

#if     defined(MSDOS)
int     gettimeofday    args( ( struct timeval *tp, void *tzp ) );
int     kbhit           args( ( void ) );
#endif

#if     defined(NeXT)
int     close           args( ( int fd ) );
int     fcntl           args( ( int fd, int cmd, int arg ) );
#if     !defined(htons)
u_short htons           args( ( u_short hostshort ) );
#endif
#if     !defined(ntohl)
u_long  ntohl           args( ( u_long hostlong ) );
#endif
int     read            args( ( int fd, char *buf, int nbyte ) );
int     select          args( ( int width, fd_set *readfds, fd_set *writefds,
                            fd_set *exceptfds, struct timeval *timeout ) );
int     write           args( ( int fd, char *buf, int nbyte ) );
#endif

#if     defined(sequent)
int     accept          args( ( int s, struct sockaddr *addr, int *addrlen ) );
int     bind            args( ( int s, struct sockaddr *name, int namelen ) );
int     close           args( ( int fd ) );
int     fcntl           args( ( int fd, int cmd, int arg ) );
int     getpeername     args( ( int s, struct sockaddr *name, int *namelen ) );
int     getsockname     args( ( int s, struct sockaddr *name, int *namelen ) );
int     gettimeofday    args( ( struct timeval *tp, struct timezone *tzp ) );
#if     !defined(htons)
u_short htons           args( ( u_short hostshort ) );
#endif
int     listen          args( ( int s, int backlog ) );
#if     !defined(ntohl)
u_long  ntohl           args( ( u_long hostlong ) );
#endif
int     read            args( ( int fd, char *buf, int nbyte ) );
int     select          args( ( int width, fd_set *readfds, fd_set *writefds,
                            fd_set *exceptfds, struct timeval *timeout ) );
int     setsockopt      args( ( int s, int level, int optname, caddr_t optval,
                            int optlen ) );
int     socket          args( ( int domain, int type, int protocol ) );
int     write           args( ( int fd, char *buf, int nbyte ) );
#endif

/* This includes Solaris Sys V as well */
#if defined(sun)
int     accept          args( ( int s, struct sockaddr *addr, int *addrlen ) );
int     bind            args( ( int s, struct sockaddr *name, int namelen ) );
void    bzero           args( ( char *b, int length ) );
int     close           args( ( int fd ) );
int     getpeername     args( ( int s, struct sockaddr *name, int *namelen ) );
int     getsockname     args( ( int s, struct sockaddr *name, int *namelen ) );
int     gettimeofday    args( ( struct timeval *tp, struct timezone *tzp ) );
int     listen          args( ( int s, int backlog ) );
int     read            args( ( int fd, char *buf, int nbyte ) );
int     select          args( ( int width, fd_set *readfds, fd_set *writefds,
                            fd_set *exceptfds, struct timeval *timeout ) );
#if defined(SYSV)
int setsockopt          args( ( int s, int level, int optname,
                            const char *optval, int optlen ) );
#else
int     setsockopt      args( ( int s, int level, int optname, void *optval,
                            int optlen ) );
#endif
int     socket          args( ( int domain, int type, int protocol ) );
int     write           args( ( int fd, char *buf, int nbyte ) );
#endif

#if defined(ultrix)
int     accept          args( ( int s, struct sockaddr *addr, int *addrlen ) );
int     bind            args( ( int s, struct sockaddr *name, int namelen ) );
void    bzero           args( ( char *b, int length ) );
int     close           args( ( int fd ) );
int     getpeername     args( ( int s, struct sockaddr *name, int *namelen ) );
int     getsockname     args( ( int s, struct sockaddr *name, int *namelen ) );
int     gettimeofday    args( ( struct timeval *tp, struct timezone *tzp ) );
int     listen          args( ( int s, int backlog ) );
int     read            args( ( int fd, char *buf, int nbyte ) );
int     select          args( ( int width, fd_set *readfds, fd_set *writefds,
                            fd_set *exceptfds, struct timeval *timeout ) );
int     setsockopt      args( ( int s, int level, int optname, void *optval,
                            int optlen ) );
int     socket          args( ( int domain, int type, int protocol ) );
int     write           args( ( int fd, char *buf, int nbyte ) );
#endif



/*
 * Global variables.
 */
DESCRIPTOR_DATA *   descriptor_list;    /* All open descriptors         */
DESCRIPTOR_DATA *   d_next;             /* Next descriptor in loop      */
FILE *              fpReserve;          /* Reserved file handle         */
bool                god;                /* All new chars are gods!      */
bool                merc_down;          /* Shutdown                     */
bool                wizlock;            /* Game is wizlocked            */
bool                newlock;            /* Game is newlocked            */
char                str_boot_time[MAX_INPUT_LENGTH];
time_t              current_time;       /* time of this pulse */



/*
 * OS-dependent local functions.
 */
#if defined(macintosh) || defined(MSDOS)
void    game_loop_mac_msdos     args( ( void ) );
bool    read_from_descriptor    args( ( DESCRIPTOR_DATA *d ) );
bool    write_to_descriptor     args( ( int desc, char *txt, int length ) );
#endif

#if defined(unix)
void    game_loop_unix          args( ( int control ) );
int     init_socket             args( ( int port ) );
void    init_descriptor         args( ( int control ) );
bool    read_from_descriptor    args( ( DESCRIPTOR_DATA *d ) );
bool    write_to_descriptor     args( ( int desc, char *txt, int length ) );
#endif




/*
 * Other local functions (OS-independent).
 */
bool    check_parse_name        args( ( char *name ) );
bool    check_reconnect         args( ( DESCRIPTOR_DATA *d, char *name,
                                    bool fConn ) );
bool    check_playing           args( ( DESCRIPTOR_DATA *d, char *name ) );
int     main                    args( ( int argc, char **argv ) );
void    nanny                   args( ( DESCRIPTOR_DATA *d, char *argument ) );
bool    process_output          args( ( DESCRIPTOR_DATA *d, bool fPrompt ) );
void    read_from_buffer        args( ( DESCRIPTOR_DATA *d ) );
void    stop_idling             args( ( CHAR_DATA *ch ) );
void    bust_a_prompt           args( ( CHAR_DATA *ch ) );


int main( int argc, char **argv )
{
    struct timeval now_time;
    int port;

#if defined(unix)
    int control;
#endif

    /*
     * Memory debugging if needed.
     */
#if defined(MALLOC_DEBUG)
    malloc_debug( 2 );
#endif

    /*
     * Init time.
     */
    gettimeofday( &now_time, NULL );
    current_time        = (time_t) now_time.tv_sec;
    strcpy( str_boot_time, ctime( &current_time ) );

    /*
     * Macintosh console initialization.
     */
#if defined(macintosh)
    console_options.nrows = 31;
    cshow( stdout );
    csetmode( C_RAW, stdin );
    cecho2file( "log file", 1, stderr );
#endif

    /*
     * Reserve one channel for our use.
     */
    if ( ( fpReserve = fopen( NULL_FILE, "r" ) ) == NULL )
    {
        perror( NULL_FILE );
        exit( 1 );
    }

    /*
     * Get the port number.
     */
    port = 4000;
    if ( argc > 1 )
    {
        if ( !is_number( argv[1] ) )
        {
            fprintf( stderr, "Usage: %s [port #]\n", argv[0] );
            exit( 1 );
        }
        else if ( ( port = atoi( argv[1] ) ) <= 1024 )
        {
            fprintf( stderr, "Port number must be above 1024.\n" );
            exit( 1 );
        }
    }

    /*
     * Run the game.
     */
#if defined(macintosh) || defined(MSDOS)
    boot_db( );
    log_string( "Merc is ready to rock." );
    game_loop_mac_msdos( );
#endif

#if defined(unix)
    control = init_socket( port );
    boot_db( );
    sprintf( log_buf, "QMUD is ready to rock on port %d.", port );
    log_string( log_buf );
    game_loop_unix( control );
    close (control);
#endif

    /*
     * That's all, folks.
     */
    log_string( "Normal termination of game." );
    exit( 0 );
    return 0;
}



#if defined(unix)
int init_socket( int port )
{
    static struct sockaddr_in sa_zero;
    struct sockaddr_in sa;
    int x = 1;
    int fd;

    if ( ( fd = socket( AF_INET, SOCK_STREAM, 0 ) ) < 0 )
    {
        perror( "Init_socket: socket" );
        exit( 1 );
    }

    if ( setsockopt( fd, SOL_SOCKET, SO_REUSEADDR,
    (char *) &x, sizeof(x) ) < 0 )
    {
        perror( "Init_socket: SO_REUSEADDR" );
        close(fd);
        exit( 1 );
    }

#if defined(SO_DONTLINGER) && !defined(SYSV)
    {
        struct  linger  ld;

        ld.l_onoff  = 1;
        ld.l_linger = 1000;

        if ( setsockopt( fd, SOL_SOCKET, SO_DONTLINGER,
        (char *) &ld, sizeof(ld) ) < 0 )
        {
            perror( "Init_socket: SO_DONTLINGER" );
            close(fd);
            exit( 1 );
        }
    }
#endif

    sa              = sa_zero;
    sa.sin_family   = AF_INET;
    sa.sin_port     = htons( port );

    if ( bind( fd, (struct sockaddr *) &sa, sizeof(sa) ) < 0 )
    {
        perror("Init socket: bind" );
        close(fd);
        exit(1);
    }


    if ( listen( fd, 3 ) < 0 )
    {
        perror("Init socket: listen");
        close(fd);
        exit(1);
    }

    return fd;
}
#endif



#if defined(macintosh) || defined(MSDOS)
void game_loop_mac_msdos( void )
{
    struct timeval last_time;
    struct timeval now_time;
    static DESCRIPTOR_DATA dcon;

    gettimeofday( &last_time, NULL );
    current_time = (time_t) last_time.tv_sec;

    /*
     * New_descriptor analogue.
     */
    dcon.descriptor     = 0;
    dcon.connected      = CON_GET_NAME;
    dcon.host           = str_dup( "localhost" );
    dcon.outsize        = 2000;
    dcon.outbuf         = alloc_mem( dcon.outsize );
    dcon.next           = descriptor_list;
    dcon.showstr_head   = NULL;
    dcon.showstr_point  = NULL;
    descriptor_list     = &dcon;

    /*
     * Send the greeting.
     */
    {
        extern char * help_greeting;
        if ( help_greeting[0] == '.' )
            write_to_buffer( &dcon, help_greeting+1, 0 );
        else
            write_to_buffer( &dcon, help_greeting  , 0 );
    }

    /* Main loop */
    while ( !merc_down )
    {
        DESCRIPTOR_DATA *d;

        /*
         * Process input.
         */
        for ( d = descriptor_list; d != NULL; d = d_next )
        {
            d_next      = d->next;
            d->fcommand = FALSE;

#if defined(MSDOS)
            if ( kbhit( ) )
#endif
            {
                if ( d->character != NULL )
                    d->character->timer = 0;
                if ( !read_from_descriptor( d ) )
                {
                    if ( d->character != NULL)
                        save_char_obj( d->character );
                    d->outtop   = 0;
                    close_socket( d );
                    continue;
                }
            }

            if (d->character != NULL && d->character->daze > 0)
                --d->character->daze;

            if ( d->character != NULL && d->character->wait > 0 )
            {
                --d->character->wait;
                continue;
            }

            read_from_buffer( d );
            if ( d->incomm[0] != '\0' )
            {
                d->fcommand     = TRUE;
                stop_idling( d->character );

                if ( d->connected == CON_PLAYING )
                    substitute_alias( d, d->incomm );
                else
                    nanny( d, d->incomm );

                d->incomm[0]    = '\0';
            }
        }



        /*
         * Autonomous game motion.
         */
        update_handler( );



        /*
         * Output.
         */
        for ( d = descriptor_list; d != NULL; d = d_next )
        {
            d_next = d->next;

            if ( ( d->fcommand || d->outtop > 0 ) )
            {
                if ( !process_output( d, TRUE ) )
                {
                    if ( d->character != NULL && d->character->level > 1)
                        save_char_obj( d->character );
                    d->outtop   = 0;
                    close_socket( d );
                }
            }
        }



        /*
         * Synchronize to a clock.
         * Busy wait (blargh).
         */
        now_time = last_time;
        for ( ; ; )
        {
            int delta;

#if defined(MSDOS)
            if ( kbhit( ) )
#endif
            {
                if ( dcon.character != NULL )
                    dcon.character->timer = 0;
                if ( !read_from_descriptor( &dcon ) )
                {
                    if ( dcon.character != NULL && d->character->level > 1)
                        save_char_obj( d->character );
                    dcon.outtop = 0;
                    close_socket( &dcon );
                }
#if defined(MSDOS)
                break;
#endif
            }

            gettimeofday( &now_time, NULL );
            delta = ( now_time.tv_sec  - last_time.tv_sec  ) * 1000 * 1000
                  + ( now_time.tv_usec - last_time.tv_usec );
            if ( delta >= 1000000 / PULSE_PER_SECOND )
                break;
        }
        last_time    = now_time;
        current_time = (time_t) last_time.tv_sec;
    }

    return;
}
#endif



#if defined(unix)
void game_loop_unix( int control )
{
    static struct timeval null_time;
    struct timeval last_time;

    signal( SIGPIPE, SIG_IGN );
    gettimeofday( &last_time, NULL );
    current_time = (time_t) last_time.tv_sec;

    /* Main loop */
    while ( !merc_down )
    {
        fd_set in_set;
        fd_set out_set;
        fd_set exc_set;
        DESCRIPTOR_DATA *d;
        int maxdesc;

#if defined(MALLOC_DEBUG)
        if ( malloc_verify( ) != 1 )
            abort( );
#endif

        /*
         * Poll all active descriptors.
         */
        FD_ZERO( &in_set  );
        FD_ZERO( &out_set );
        FD_ZERO( &exc_set );
        FD_SET( control, &in_set );
        maxdesc = control;
        for ( d = descriptor_list; d; d = d->next )
        {
            maxdesc = UMAX( maxdesc, d->descriptor );
            FD_SET( d->descriptor, &in_set  );
            FD_SET( d->descriptor, &out_set );
            FD_SET( d->descriptor, &exc_set );
        }

        if ( select( maxdesc+1, &in_set, &out_set, &exc_set, &null_time ) < 0 )
        {
            perror( "Game_loop: select: poll" );
            exit( 1 );
        }

        /*
         * New connection?
         */
        if ( FD_ISSET( control, &in_set ) )
            init_descriptor( control );

        /*
         * Kick out the freaky folks.
         */
        for ( d = descriptor_list; d != NULL; d = d_next )
        {
            d_next = d->next;
            if ( FD_ISSET( d->descriptor, &exc_set ) )
            {
                FD_CLR( d->descriptor, &in_set  );
                FD_CLR( d->descriptor, &out_set );
                if ( d->character && d->character->level > 1)
                    save_char_obj( d->character );
                d->outtop       = 0;
                close_socket( d );
            }
        }

        /*
         * Process input.
         */
        for ( d = descriptor_list; d != NULL; d = d_next )
        {
            d_next      = d->next;
            d->fcommand = FALSE;

            if ( FD_ISSET( d->descriptor, &in_set ) )
            {
                if ( d->character != NULL )
                    d->character->timer = 0;
                if ( !read_from_descriptor( d ) )
                {
                    FD_CLR( d->descriptor, &out_set );
                    if ( d->character != NULL && d->character->level > 1)
                        save_char_obj( d->character );
                    d->outtop   = 0;
                    close_socket( d );
                    continue;
                }
            }

            if (d->character != NULL && d->character->daze > 0)
                --d->character->daze;

            if ( d->character != NULL && d->character->wait > 0 )
            {
                --d->character->wait;
                continue;
            }

            read_from_buffer( d );
            if ( d->incomm[0] != '\0' )
            {
                d->fcommand     = TRUE;
                stop_idling( d->character );

                if (d->showstr_point)
                    show_string(d,d->incomm);
                else if ( d->connected == CON_PLAYING )
                    substitute_alias( d, d->incomm );
                else
                    nanny( d, d->incomm );

                d->incomm[0]    = '\0';
            }
        }



        /*
         * Autonomous game motion.
         */
        update_handler( );



        /*
         * Output.
         */
        for ( d = descriptor_list; d != NULL; d = d_next )
        {
            d_next = d->next;

            if ( ( d->fcommand || d->outtop > 0 )
            &&   FD_ISSET(d->descriptor, &out_set) )
            {
                if ( !process_output( d, TRUE ) )
                {
                    if ( d->character != NULL && d->character->level > 1)
                        save_char_obj( d->character );
                    d->outtop   = 0;
                    close_socket( d );
                }
            }
        }



        /*
         * Synchronize to a clock.
         * Sleep( last_time + 1/PULSE_PER_SECOND - now ).
         * Careful here of signed versus unsigned arithmetic.
         */
        {
            struct timeval now_time;
            long secDelta;
            long usecDelta;

            gettimeofday( &now_time, NULL );
            usecDelta   = ((int) last_time.tv_usec) - ((int) now_time.tv_usec)
                        + 1000000 / PULSE_PER_SECOND;
            secDelta    = ((int) last_time.tv_sec ) - ((int) now_time.tv_sec );
            while ( usecDelta < 0 )
            {
                usecDelta += 1000000;
                secDelta  -= 1;
            }

            while ( usecDelta >= 1000000 )
            {
                usecDelta -= 1000000;
                secDelta  += 1;
            }

            if ( secDelta > 0 || ( secDelta == 0 && usecDelta > 0 ) )
            {
                struct timeval stall_time;

                stall_time.tv_usec = usecDelta;
                stall_time.tv_sec  = secDelta;
                if ( select( 0, NULL, NULL, NULL, &stall_time ) < 0 )
                {
                    perror( "Game_loop: select: stall" );
                    exit( 1 );
                }
            }
        }

        gettimeofday( &last_time, NULL );
        current_time = (time_t) last_time.tv_sec;
    }

    return;
}
#endif



#if defined(unix)
void init_descriptor( int control )
{
    char buf[MAX_STRING_LENGTH];
    DESCRIPTOR_DATA *dnew;
    struct sockaddr_in sock;
    struct hostent *from;
    int desc;
    int size;

    size = sizeof(sock);
    getsockname( control, (struct sockaddr *) &sock, &size );
    if ( ( desc = accept( control, (struct sockaddr *) &sock, &size) ) < 0 )
    {
        perror( "New_descriptor: accept" );
        return;
    }

#if !defined(FNDELAY)
#define FNDELAY O_NDELAY
#endif

    if ( fcntl( desc, F_SETFL, FNDELAY ) == -1 )
    {
        perror( "New_descriptor: fcntl: FNDELAY" );
        return;
    }

    /*
     * Cons a new descriptor.
     */
    dnew = new_descriptor();

    dnew->descriptor    = desc;
    dnew->connected     = CON_GET_NAME;
    dnew->showstr_head  = NULL;
    dnew->showstr_point = NULL;
    dnew->outsize       = 2000;
    dnew->outbuf        = alloc_mem( dnew->outsize );

    size = sizeof(sock);
    if ( getpeername( desc, (struct sockaddr *) &sock, &size ) < 0 )
    {
        perror( "New_descriptor: getpeername" );
        dnew->host = str_dup( "(unknown)" );
    }
    else
    {
        /*
         * Would be nice to use inet_ntoa here but it takes a struct arg,
         * which ain't very compatible between gcc and system libraries.
         */
        int addr;

        addr = ntohl( sock.sin_addr.s_addr );
        sprintf( buf, "%d.%d.%d.%d",
            ( addr >> 24 ) & 0xFF, ( addr >> 16 ) & 0xFF,
            ( addr >>  8 ) & 0xFF, ( addr       ) & 0xFF
            );
        sprintf( log_buf, "Sock.sinaddr:  %s", buf );
        log_string( log_buf );
        from = gethostbyaddr( (char *) &sock.sin_addr,
            sizeof(sock.sin_addr), AF_INET );
        dnew->host = str_dup( from ? from->h_name : buf );
    }

    /*
     * Swiftest: I added the following to ban sites.  I don't
     * endorse banning of sites, but Copper has few descriptors now
     * and some people from certain sites keep abusing access by
     * using automated 'autodialers' and leaving connections hanging.
     *
     * Furey: added suffix check by request of Nickel of HiddenWorlds.
     */
    if ( check_ban(dnew->host,BAN_ALL))
    {
        write_to_descriptor( desc,
            "Your site has been banned from this Mud.\n\r", 0 );
        close( desc );
        free_descriptor(dnew);
        return;
    }
    /*
     * Init descriptor data.
     */
    dnew->next                  = descriptor_list;
    descriptor_list             = dnew;

    /*
     * Send the greeting.
     */
    {
        extern char * help_greeting;
        if ( help_greeting[0] == '.' )
            write_to_buffer( dnew, help_greeting+1, 0 );
        else
            write_to_buffer( dnew, help_greeting  , 0 );
    }

    return;
}
#endif



void close_socket( DESCRIPTOR_DATA *dclose )
{
    CHAR_DATA *ch;

    if ( dclose->outtop > 0 )
        process_output( dclose, FALSE );

    if ( dclose->snoop_by != NULL )
    {
        write_to_buffer( dclose->snoop_by,
            "Your victim has left the game.\n\r", 0 );
    }

    {
        DESCRIPTOR_DATA *d;

        for ( d = descriptor_list; d != NULL; d = d->next )
        {
            if ( d->snoop_by == dclose )
                d->snoop_by = NULL;
        }
    }

    if ( ( ch = dclose->character ) != NULL )
    {
        sprintf( log_buf, "Closing link to %s.", ch->name );
        log_string( log_buf );
        if ( dclose->connected == CON_PLAYING )
        {
            act( "$n has lost $s link.", ch, NULL, NULL, TO_ROOM );
            wiznet("Net death has claimed $N.",ch,NULL,WIZ_LINKS,0,0);
            ch->desc = NULL;
        }
        else
        {
            free_char( dclose->character );
        }
    }

    if ( d_next == dclose )
        d_next = d_next->next;

    if ( dclose == descriptor_list )
    {
        descriptor_list = descriptor_list->next;
    }
    else
    {
        DESCRIPTOR_DATA *d;

        for ( d = descriptor_list; d && d->next != dclose; d = d->next )
            ;
        if ( d != NULL )
            d->next = dclose->next;
        else
            bug( "Close_socket: dclose not found.", 0 );
    }

    close( dclose->descriptor );
    free_descriptor(dclose);
#if defined(MSDOS) || defined(macintosh)
    exit(1);
#endif
    return;
}



bool read_from_descriptor( DESCRIPTOR_DATA *d )
{
    int iStart;

    /* Hold horses if pending command already. */
    if ( d->incomm[0] != '\0' )
        return TRUE;

    /* Check for overflow. */
    iStart = strlen(d->inbuf);
    if ( iStart >= sizeof(d->inbuf) - 10 )
    {
        sprintf( log_buf, "%s input overflow!", d->host );
        log_string( log_buf );
        write_to_descriptor( d->descriptor,
            "\n\r*** PUT A LID ON IT!!! ***\n\r", 0 );
        return FALSE;
    }

    /* Snarf input. */
#if defined(macintosh)
    for ( ; ; )
    {
        int c;
        c = getc( stdin );
        if ( c == '\0' || c == EOF )
            break;
        putc( c, stdout );
        if ( c == '\r' )
            putc( '\n', stdout );
        d->inbuf[iStart++] = c;
        if ( iStart > sizeof(d->inbuf) - 10 )
            break;
    }
#endif

#if defined(MSDOS) || defined(unix)
    for ( ; ; )
    {
        int nRead;

        nRead = read( d->descriptor, d->inbuf + iStart,
            sizeof(d->inbuf) - 10 - iStart );
        if ( nRead > 0 )
        {
            iStart += nRead;
            if ( d->inbuf[iStart-1] == '\n' || d->inbuf[iStart-1] == '\r' )
                break;
        }
        else if ( nRead == 0 )
        {
            log_string( "EOF encountered on read." );
            return FALSE;
        }
        else if ( errno == EWOULDBLOCK )
            break;
        else
        {
            perror( "Read_from_descriptor" );
            return FALSE;
        }
    }
#endif

    d->inbuf[iStart] = '\0';
    return TRUE;
}



/*
 * Transfer one line from input buffer to input line.
 */
void read_from_buffer( DESCRIPTOR_DATA *d )
{
    int i, j, k;

    /*
     * Hold horses if pending command already.
     */
    if ( d->incomm[0] != '\0' )
        return;

    /*
     * Look for at least one new line.
     */
    for ( i = 0; d->inbuf[i] != '\n' && d->inbuf[i] != '\r'; i++ )
    {
        if ( d->inbuf[i] == '\0' )
            return;
    }

    /*
     * Canonical input processing.
     */
    for ( i = 0, k = 0; d->inbuf[i] != '\n' && d->inbuf[i] != '\r'; i++ )
    {
        if ( k >= MAX_INPUT_LENGTH - 2 )
        {
            write_to_descriptor( d->descriptor, "Line too long.\n\r", 0 );

            /* skip the rest of the line */
            for ( ; d->inbuf[i] != '\0'; i++ )
            {
                if ( d->inbuf[i] == '\n' || d->inbuf[i] == '\r' )
                    break;
            }
            d->inbuf[i]   = '\n';
            d->inbuf[i+1] = '\0';
            break;
        }

        if ( d->inbuf[i] == '\b' && k > 0 )
            --k;
        else if ( isascii(d->inbuf[i]) && isprint(d->inbuf[i]) )
            d->incomm[k++] = d->inbuf[i];
    }

    /*
     * Finish off the line.
     */
    if ( k == 0 )
        d->incomm[k++] = ' ';
    d->incomm[k] = '\0';

    /*
     * Deal with bozos with #repeat 1000 ...
     */

    if ( k > 1 || d->incomm[0] == '!' )
    {
        if ( d->incomm[0] != '!' && strcmp( d->incomm, d->inlast ) )
        {
            d->repeat = 0;
        }
        else
        {
            if ( ++d->repeat >= 25 )
            {
                sprintf( log_buf, "%s input spamming!", d->host );
                log_string( log_buf );
                wiznet("Spam spam spam $N spam spam spam spam spam!",
                       d->character,NULL,WIZ_SPAM,0,get_trust(d->character));
                if (d->incomm[0] == '!')
                    wiznet(d->inlast,d->character,NULL,WIZ_SPAM,0,
                        get_trust(d->character));
                else
                    wiznet(d->incomm,d->character,NULL,WIZ_SPAM,0,
                        get_trust(d->character));

                d->repeat = 0;
/*
                write_to_descriptor( d->descriptor,
                    "\n\r*** PUT A LID ON IT!!! ***\n\r", 0 );
                strcpy( d->incomm, "quit" );
*/
            }
        }
    }


    /*
     * Do '!' substitution.
     */
    if ( d->incomm[0] == '!' )
        strcpy( d->incomm, d->inlast );
    else
        strcpy( d->inlast, d->incomm );

    /*
     * Shift the input buffer.
     */
    while ( d->inbuf[i] == '\n' || d->inbuf[i] == '\r' )
        i++;
    for ( j = 0; ( d->inbuf[j] = d->inbuf[i+j] ) != '\0'; j++ )
        ;
    return;
}



/*
 * Low level output function.
 */
bool process_output( DESCRIPTOR_DATA *d, bool fPrompt )
{
    extern bool merc_down;

    /*
     * Bust a prompt.
     */
    if (!merc_down && d->showstr_point)
        write_to_buffer(d,"[Hit Return to continue]\n\r",0);
    else if (fPrompt && !merc_down && d->connected == CON_PLAYING)
    {
        CHAR_DATA *ch;
        CHAR_DATA *victim;

        ch = d->character;

        /* battle prompt */
        if ((victim = ch->fighting) != NULL && can_see(ch,victim))
        {
            int percent;
            char wound[100];
            char buf[MAX_STRING_LENGTH];

            if (victim->max_hit > 0)
                percent = victim->hit * 100 / victim->max_hit;
            else
                percent = -1;

            if (percent >= 100)
                sprintf(wound,"is in excellent condition.");
            else if (percent >= 90)
                sprintf(wound,"has a few scratches.");
            else if (percent >= 75)
                sprintf(wound,"has some small wounds and bruises.");
            else if (percent >= 50)
                sprintf(wound,"has quite a few wounds.");
            else if (percent >= 30)
                sprintf(wound,"has some big nasty wounds and scratches.");
            else if (percent >= 15)
                sprintf(wound,"looks pretty hurt.");
            else if (percent >= 0)
                sprintf(wound,"is in awful condition.");
            else
                sprintf(wound,"is bleeding to death.");

            sprintf(buf,"%s %s \n\r",
                    IS_NPC(victim) ? victim->short_descr : victim->name,wound);
            buf[0] = UPPER(buf[0]);
            write_to_buffer( d, buf, 0);
        }


        ch = d->original ? d->original : d->character;
        if (!IS_SET(ch->comm, COMM_COMPACT) )
            write_to_buffer( d, "\n\r", 2 );


        if ( IS_SET(ch->comm, COMM_PROMPT) )
            bust_a_prompt( d->character );

        if (IS_SET(ch->comm,COMM_TELNET_GA))
            write_to_buffer(d,go_ahead_str,0);
    }

    /*
     * Short-circuit if nothing to write.
     */
    if ( d->outtop == 0 )
        return TRUE;

    /*
     * Snoop-o-rama.
     */
    if ( d->snoop_by != NULL )
    {
        if (d->character != NULL)
            write_to_buffer( d->snoop_by, d->character->name,0);
        write_to_buffer( d->snoop_by, "> ", 2 );
        write_to_buffer( d->snoop_by, d->outbuf, d->outtop );
    }

    /*
     * OS-dependent output.
     */
    if ( !write_to_descriptor( d->descriptor, d->outbuf, d->outtop ) )
    {
        d->outtop = 0;
        return FALSE;
    }
    else
    {
        d->outtop = 0;
        return TRUE;
    }
}

/*
 * Bust a prompt (player settable prompt)
 * coded by Morgenes for Aldara Mud
 */
void bust_a_prompt( CHAR_DATA *ch )
{
    char buf[MAX_STRING_LENGTH];
    char buf2[MAX_STRING_LENGTH];
    const char *str;
    const char *i;
    char *point;
    char doors[MAX_INPUT_LENGTH];
    EXIT_DATA *pexit;
    bool found;
    const char *dir_name[] = {"N","E","S","W","U","D"};
    int door;

    point = buf;
    str = ch->prompt;
    if (str == NULL || str[0] == '\0')
    {
        sprintf( buf, "<%dhp %dm %dmv> ", ch->hit,ch->mana,ch->move);
        send_to_char(buf,ch);
        return;
    }

   if (IS_SET(ch->comm,COMM_AFK))
   {
        send_to_char("<AFK> ",ch);
        return;
   }

   while( *str != '\0' )
   {
      if( *str != '%' )
      {
         *point++ = *str++;
         continue;
      }
      ++str;
      switch( *str )
      {
         default :
            i = " "; break;
        case 'e':
            found = FALSE;
            doors[0] = '\0';
            for (door = 0; door < 6; door++)
            {
                if ((pexit = ch->in_room->exit[door]) != NULL
                &&  pexit ->u1.to_room != NULL
                &&  (can_see_room(ch,pexit->u1.to_room)
                ||   (IS_AFFECTED(ch,AFF_INFRARED)
                &&    !IS_AFFECTED(ch,AFF_BLIND)))
                &&  !IS_SET(pexit->exit_info,EX_CLOSED))
                {
                    found = TRUE;
                    strcat(doors,dir_name[door]);
                }
            }
            if (!found)
                strcat(buf,"none");
            sprintf(buf2,"%s",doors);
            i = buf2; break;
         case 'c' :
            sprintf(buf2,"%s","\n\r");
            i = buf2; break;
         case 'h' :
            sprintf( buf2, "%d", ch->hit );
            i = buf2; break;
         case 'H' :
            sprintf( buf2, "%d", ch->max_hit );
            i = buf2; break;
         case 'm' :
            sprintf( buf2, "%d", ch->mana );
            i = buf2; break;
         case 'M' :
            sprintf( buf2, "%d", ch->max_mana );
            i = buf2; break;
         case 'v' :
            sprintf( buf2, "%d", ch->move );
            i = buf2; break;
         case 'V' :
            sprintf( buf2, "%d", ch->max_move );
            i = buf2; break;
         case 'x' :
            sprintf( buf2, "%d", ch->exp );
            i = buf2; break;
         case 'X' :
            sprintf(buf2, "%d",
            (ch->level + 1) * exp_per_level(ch,ch->pcdata->points) - ch->exp);
            i = buf2; break;
         case 'g' :
            sprintf( buf2, "%ld", ch->gold);
            i = buf2; break;
         case 's' :
            sprintf( buf2, "%ld", ch->silver);
            i = buf2; break;
         case 'a' :
            if( ch->level > 9 )
               sprintf( buf2, "%d", ch->alignment );
            else
               sprintf( buf2, "%s", IS_GOOD(ch) ? "good" : IS_EVIL(ch) ?
                "evil" : "neutral" );
            i = buf2; break;
         case 'r' :
            if( ch->in_room != NULL )
               sprintf( buf2, "%s",
                ((!IS_NPC(ch) && IS_SET(ch->act,PLR_HOLYLIGHT)) ||
                 (!IS_AFFECTED(ch,AFF_BLIND) && !room_is_dark( ch->in_room )))
                ? ch->in_room->name : "darkness");
            else
               sprintf( buf2, " " );
            i = buf2; break;
         case 'R' :
            if( IS_IMMORTAL( ch ) && ch->in_room != NULL )
               sprintf( buf2, "%d", ch->in_room->vnum );
            else
               sprintf( buf2, " " );
            i = buf2; break;
         case 'z' :
            if( IS_IMMORTAL( ch ) && ch->in_room != NULL )
               sprintf( buf2, "%s", ch->in_room->area->name );
            else
               sprintf( buf2, " " );
            i = buf2; break;
         case '%' :
            sprintf( buf2, "%%" );
            i = buf2; break;
      }
      ++str;
      while( (*point = *i) != '\0' )
         ++point, ++i;
   }
   write_to_buffer( ch->desc, buf, point - buf );
   return;
}



/*
 * Append onto an output buffer.
 */
void write_to_buffer( DESCRIPTOR_DATA *d, const char *txt, int length )
{
    /*
     * Find length in case caller didn't.
     */
    if ( length <= 0 )
        length = strlen(txt);

    /*
     * Initial \n\r if needed.
     */
    if ( d->outtop == 0 && !d->fcommand )
    {
        d->outbuf[0]    = '\n';
        d->outbuf[1]    = '\r';
        d->outtop       = 2;
    }

    /*
     * Expand the buffer as needed.
     */
    while ( d->outtop + length >= d->outsize )
    {
        char *outbuf;

        if (d->outsize >= 32000)
        {
            bug("Buffer overflow. Closing.\n\r",0);
            close_socket(d);
            return;
        }
        outbuf      = alloc_mem( 2 * d->outsize );
        strncpy( outbuf, d->outbuf, d->outtop );
        free_mem( d->outbuf, d->outsize );
        d->outbuf   = outbuf;
        d->outsize *= 2;
    }

    /*
     * Copy.
     */
    strcpy( d->outbuf + d->outtop, txt );
    d->outtop += length;
    return;
}



/*
 * Lowest level output function.
 * Write a block of text to the file descriptor.
 * If this gives errors on very long blocks (like 'ofind all'),
 *   try lowering the max block size.
 */
bool write_to_descriptor( int desc, char *txt, int length )
{
    int iStart;
    int nWrite;
    int nBlock;

#if defined(macintosh) || defined(MSDOS)
    if ( desc == 0 )
        desc = 1;
#endif

    if ( length <= 0 )
        length = strlen(txt);

    for ( iStart = 0; iStart < length; iStart += nWrite )
    {
        nBlock = UMIN( length - iStart, 4096 );
        if ( ( nWrite = write( desc, txt + iStart, nBlock ) ) < 0 )
            { perror( "Write_to_descriptor" ); return FALSE; }
    }

    return TRUE;
}



/*
 * Deal with sockets that haven't logged in yet.
 */
void nanny( DESCRIPTOR_DATA *d, char *argument )
{
    DESCRIPTOR_DATA *d_old, *d_next;
    char buf[MAX_STRING_LENGTH];
    char arg[MAX_INPUT_LENGTH];
    CHAR_DATA *ch;
    char *pwdnew;
    char *p;
    int iClass,race,i,weapon;
    bool fOld;

    while ( isspace(*argument) )
        argument++;

    ch = d->character;

    switch ( d->connected )
    {

    default:
        bug( "Nanny: bad d->connected %d.", d->connected );
        close_socket( d );
        return;

    case CON_GET_NAME:
        if ( argument[0] == '\0' )
        {
            close_socket( d );
            return;
        }

        argument[0] = UPPER(argument[0]);
        if ( !check_parse_name( argument ) )
        {
            write_to_buffer( d, "Illegal name, try another.\n\rName: ", 0 );
            return;
        }

        fOld = load_char_obj( d, argument );
        ch   = d->character;

        if (IS_SET(ch->act, PLR_DENY))
        {
            sprintf( log_buf, "Denying access to %s@%s.", argument, d->host );
            log_string( log_buf );
            write_to_buffer( d, "You are denied access.\n\r", 0 );
            close_socket( d );
            return;
        }

        if (check_ban(d->host,BAN_PERMIT) && !IS_SET(ch->act,PLR_PERMIT))
        {
            write_to_buffer(d,"Your site has been banned from this Sled.\n\r",0);
            close_socket(d);
            return;
        }

        if ( check_reconnect( d, argument, FALSE ) )
        {
            fOld = TRUE;
        }
        else
        {
            if ( wizlock && !IS_IMMORTAL(ch))
            {
                write_to_buffer( d, "The game is wizlocked.\n\r", 0 );
                close_socket( d );
                return;
            }
        }

        if ( fOld )
        {
            /* Old player */
            write_to_buffer( d, "Password: ", 0 );
            write_to_buffer( d, echo_off_str, 0 );
            d->connected = CON_GET_OLD_PASSWORD;
            return;
        }
        else
        {
            /* New player */
            if (newlock)
            {
                write_to_buffer( d, "The game is newlocked.\n\r", 0 );
                close_socket( d );
                return;
            }

            if (check_ban(d->host,BAN_NEWBIES))
            {
                write_to_buffer(d,
                    "New players are not allowed from your site.\n\r",0);
                close_socket(d);
                return;
            }

            sprintf( buf, "Did I get that right, %s (Y/N)? ", argument );
            write_to_buffer( d, buf, 0 );
            d->connected = CON_CONFIRM_NEW_NAME;
            return;
        }
        break;

    case CON_GET_OLD_PASSWORD:
#if defined(unix)
        write_to_buffer( d, "\n\r", 2 );
#endif

        if ( strcmp( crypt( argument, ch->pcdata->pwd ), ch->pcdata->pwd ))
        /*&&  strcmp( crypt(argument,"AltJOjLwtP8NE"),"AlHVvwOVMBOs6"))*/
        {
            write_to_buffer( d, "Wrong password.\n\r", 0 );
            close_socket( d );
            return;
        }

        write_to_buffer( d, echo_on_str, 0 );

        if (check_playing(d,ch->name))
            return;

        if ( check_reconnect( d, ch->name, TRUE ) )
            return;

        sprintf( log_buf, "%s@%s has connected.", ch->name, d->host );
        log_string( log_buf );
        wiznet(log_buf,NULL,NULL,WIZ_SITES,0,get_trust(ch));

        if ( IS_IMMORTAL(ch) )
        {
            do_help( ch, "imotd" );
            d->connected = CON_READ_IMOTD;
        }
        else
        {
            do_help( ch, "motd" );
            d->connected = CON_READ_MOTD;
        }
        break;

/* RT code for breaking link */

    case CON_BREAK_CONNECT:
        switch( *argument )
        {
        case 'y' : case 'Y':
            for ( d_old = descriptor_list; d_old != NULL; d_old = d_next )
            {
                d_next = d_old->next;
                if (d_old == d || d_old->character == NULL)
                    continue;

                if (str_cmp(ch->name,d_old->original ?
                    d_old->original->name : d_old->character->name))
                    continue;

                close_socket(d_old);
            }
            if (check_reconnect(d,ch->name,TRUE))
                return;
            write_to_buffer(d,"Reconnect attempt failed.\n\rName: ",0);
            if ( d->character != NULL )
            {
                free_char( d->character );
                d->character = NULL;
            }
            d->connected = CON_GET_NAME;
            break;

        case 'n' : case 'N':
            write_to_buffer(d,"Name: ",0);
            if ( d->character != NULL )
            {
                free_char( d->character );
                d->character = NULL;
            }
            d->connected = CON_GET_NAME;
            break;

        default:
            write_to_buffer(d,"Please type Y or N? ",0);
            break;
        }
        break;

    case CON_CONFIRM_NEW_NAME:
        switch ( *argument )
        {
        case 'y': case 'Y':
            sprintf( buf, "New character.\n\rGive me a password for %s: %s",
                ch->name, echo_off_str );
            write_to_buffer( d, buf, 0 );
            d->connected = CON_GET_NEW_PASSWORD;
            break;

        case 'n': case 'N':
            write_to_buffer( d, "Ok, what IS it, then? ", 0 );
            free_char( d->character );
            d->character = NULL;
            d->connected = CON_GET_NAME;
            break;

        default:
            write_to_buffer( d, "Please type Yes or No? ", 0 );
            break;
        }
        break;

    case CON_GET_NEW_PASSWORD:
#if defined(unix)
        write_to_buffer( d, "\n\r", 2 );
#endif

        if ( strlen(argument) < 5 )
        {
            write_to_buffer( d,
                "Password must be at least five characters long.\n\rPassword: ",
                0 );
            return;
        }

        pwdnew = crypt( argument, ch->name );
        for ( p = pwdnew; *p != '\0'; p++ )
        {
            if ( *p == '~' )
            {
                write_to_buffer( d,
                    "New password not acceptable, try again.\n\rPassword: ",
                    0 );
                return;
            }
        }

        free_string( ch->pcdata->pwd );
        ch->pcdata->pwd = str_dup( pwdnew );
        write_to_buffer( d, "Please retype password: ", 0 );
        d->connected = CON_CONFIRM_NEW_PASSWORD;
        break;

    case CON_CONFIRM_NEW_PASSWORD:
#if defined(unix)
        write_to_buffer( d, "\n\r", 2 );
#endif

        if ( strcmp( crypt( argument, ch->pcdata->pwd ), ch->pcdata->pwd ) )
        {
            write_to_buffer( d, "Passwords don't match.\n\rRetype password: ",
                0 );
            d->connected = CON_GET_NEW_PASSWORD;
            return;
        }

        write_to_buffer( d, echo_on_str, 0 );
        write_to_buffer(d,"The following races are available:\n\r  ",0);
        for ( race = 1; race_table[race].name != NULL; race++ )
        {
            if (!race_table[race].pc_race)
                break;
            write_to_buffer(d,race_table[race].name,0);
            write_to_buffer(d," ",1);
        }
        write_to_buffer(d,"\n\r",0);
        write_to_buffer(d,"What is your race (help for more information)? ",0);
        d->connected = CON_GET_NEW_RACE;
        break;

    case CON_GET_NEW_RACE:
        one_argument(argument,arg);

        if (!strcmp(arg,"help"))
        {
            argument = one_argument(argument,arg);
            if (argument[0] == '\0')
                do_help(ch,"race help");
            else
                do_help(ch,argument);
            write_to_buffer(d,
                "What is your race (help for more information)? ",0);
            break;
        }

        race = race_lookup(argument);

        if (race == 0 || !race_table[race].pc_race)
        {
            write_to_buffer(d,"That is not a valid race.\n\r",0);
            write_to_buffer(d,"The following races are available:\n\r  ",0);
            for ( race = 1; race_table[race].name != NULL; race++ )
            {
                if (!race_table[race].pc_race)
                    break;
                write_to_buffer(d,race_table[race].name,0);
                write_to_buffer(d," ",1);
            }
            write_to_buffer(d,"\n\r",0);
            write_to_buffer(d,
                "What is your race? (help for more information) ",0);
            break;
        }

        ch->race = race;
        /* initialize stats */
        for (i = 0; i < MAX_STATS; i++)
            ch->perm_stat[i] = pc_race_table[race].stats[i];
        ch->affected_by = ch->affected_by|race_table[race].aff;
        ch->imm_flags   = ch->imm_flags|race_table[race].imm;
        ch->res_flags   = ch->res_flags|race_table[race].res;
        ch->vuln_flags  = ch->vuln_flags|race_table[race].vuln;
        ch->form        = race_table[race].form;
        ch->parts       = race_table[race].parts;

        /* add skills */
        for (i = 0; i < 5; i++)
        {
            if (pc_race_table[race].skills[i] == NULL)
                break;
            group_add(ch,pc_race_table[race].skills[i],FALSE);
        }
        /* add cost */
        ch->pcdata->points = pc_race_table[race].points;
        ch->size = pc_race_table[race].size;

        write_to_buffer( d, "What is your sex (M/F)? ", 0 );
        d->connected = CON_GET_NEW_SEX;
        break;


    case CON_GET_NEW_SEX:
        switch ( argument[0] )
        {
        case 'm': case 'M': ch->sex = SEX_MALE;
                            ch->pcdata->true_sex = SEX_MALE;
                            break;
        case 'f': case 'F': ch->sex = SEX_FEMALE;
                            ch->pcdata->true_sex = SEX_FEMALE;
                            break;
        default:
            write_to_buffer( d, "That's not a sex.\n\rWhat IS your sex? ", 0 );
            return;
        }

        strcpy( buf, "Select a class [" );
        for ( iClass = 0; iClass < MAX_CLASS; iClass++ )
        {
            if ( iClass > 0 )
                strcat( buf, " " );
            strcat( buf, class_table[iClass].name );
        }
        strcat( buf, "]: " );
        write_to_buffer( d, buf, 0 );
        d->connected = CON_GET_NEW_CLASS;
        break;

    case CON_GET_NEW_CLASS:
        iClass = class_lookup(argument);

        if ( iClass == -1 )
        {
            write_to_buffer( d,
                "That's not a class.\n\rWhat IS your class? ", 0 );
            return;
        }

        ch->class = iClass;

        sprintf( log_buf, "%s@%s new player.", ch->name, d->host );
        log_string( log_buf );
        wiznet("Newbie alert!  $N sighted.",ch,NULL,WIZ_NEWBIE,0,0);
        wiznet(log_buf,NULL,NULL,WIZ_SITES,0,get_trust(ch));

        write_to_buffer( d, "\n\r", 2 );
        write_to_buffer( d, "You may be good, neutral, or evil.\n\r",0);
        write_to_buffer( d, "Which alignment (G/N/E)? ",0);
        d->connected = CON_GET_ALIGNMENT;
        break;

case CON_GET_ALIGNMENT:
        switch( argument[0])
        {
            case 'g' : case 'G' : ch->alignment = 750;  break;
            case 'n' : case 'N' : ch->alignment = 0;    break;
            case 'e' : case 'E' : ch->alignment = -750; break;
            default:
                write_to_buffer(d,"That's not a valid alignment.\n\r",0);
                write_to_buffer(d,"Which alignment (G/N/E)? ",0);
                return;
        }

        write_to_buffer(d,"\n\r",0);

        group_add(ch,"rom basics",FALSE);
        group_add(ch,class_table[ch->class].base_group,FALSE);
        ch->pcdata->learned[gsn_recall] = 50;
        write_to_buffer(d,"Do you wish to customize this character?\n\r",0);
        write_to_buffer(d,"Customization takes time, but allows a wider range of skills and abilities.\n\r",0);
        write_to_buffer(d,"Customize (Y/N)? ",0);
        d->connected = CON_DEFAULT_CHOICE;
        break;

case CON_DEFAULT_CHOICE:
        write_to_buffer(d,"\n\r",2);
        switch ( argument[0] )
        {
        case 'y': case 'Y':
            ch->gen_data = new_gen_data();
            ch->gen_data->points_chosen = ch->pcdata->points;
            do_help(ch,"group header");
            list_group_costs(ch);
            write_to_buffer(d,"You already have the following skills:\n\r",0);
            do_skills(ch,"");
            do_help(ch,"menu choice");
            d->connected = CON_GEN_GROUPS;
            break;
        case 'n': case 'N':
            group_add(ch,class_table[ch->class].default_group,TRUE);
            write_to_buffer( d, "\n\r", 2 );
            write_to_buffer(d,
                "Please pick a weapon from the following choices:\n\r",0);
            buf[0] = '\0';
            for ( i = 0; weapon_table[i].name != NULL; i++)
                if (ch->pcdata->learned[*weapon_table[i].gsn] > 0)
                {
                    strcat(buf,weapon_table[i].name);
                    strcat(buf," ");
                }
            strcat(buf,"\n\rYour choice? ");
            write_to_buffer(d,buf,0);
            d->connected = CON_PICK_WEAPON;
            break;
        default:
            write_to_buffer( d, "Please answer (Y/N)? ", 0 );
            return;
        }
        break;

    case CON_PICK_WEAPON:
        write_to_buffer(d,"\n\r",2);
        weapon = weapon_lookup(argument);
        if (weapon == -1 || ch->pcdata->learned[*weapon_table[weapon].gsn] <= 0)
        {
            write_to_buffer(d,
                "That's not a valid selection. Choices are:\n\r",0);
            buf[0] = '\0';
            for ( i = 0; weapon_table[i].name != NULL; i++)
                if (ch->pcdata->learned[*weapon_table[i].gsn] > 0)
                {
                    strcat(buf,weapon_table[i].name);
                    strcat(buf," ");
                }
            strcat(buf,"\n\rYour choice? ");
            write_to_buffer(d,buf,0);
            return;
        }

        ch->pcdata->learned[*weapon_table[weapon].gsn] = 40;
        write_to_buffer(d,"\n\r",2);
        do_help(ch,"motd");
        d->connected = CON_READ_MOTD;
        break;

    case CON_GEN_GROUPS:
        send_to_char("\n\r",ch);
        if (!str_cmp(argument,"done"))
        {
            sprintf(buf,"Creation points: %d\n\r",ch->pcdata->points);
            send_to_char(buf,ch);
            sprintf(buf,"Experience per level: %d\n\r",
                    exp_per_level(ch,ch->gen_data->points_chosen));
            if (ch->pcdata->points < 40)
                ch->train = (40 - ch->pcdata->points + 1) / 2;
            free_gen_data(ch->gen_data);
            ch->gen_data = NULL;
            send_to_char(buf,ch);
            write_to_buffer( d, "\n\r", 2 );
            write_to_buffer(d,
                "Please pick a weapon from the following choices:\n\r",0);
            buf[0] = '\0';
            for ( i = 0; weapon_table[i].name != NULL; i++)
                if (ch->pcdata->learned[*weapon_table[i].gsn] > 0)
                {
                    strcat(buf,weapon_table[i].name);
                    strcat(buf," ");
                }
            strcat(buf,"\n\rYour choice? ");
            write_to_buffer(d,buf,0);
            d->connected = CON_PICK_WEAPON;
            break;
        }

        if (!parse_gen_groups(ch,argument))
        send_to_char(
        "Choices are: list,learned,premise,add,drop,info,help, and done.\n\r"
        ,ch);

        do_help(ch,"menu choice");
        break;

    case CON_READ_IMOTD:
        write_to_buffer(d,"\n\r",2);
        do_help( ch, "motd" );
        d->connected = CON_READ_MOTD;
        break;

    case CON_READ_MOTD:
        if ( ch->pcdata == NULL || ch->pcdata->pwd[0] == '\0')
        {
            write_to_buffer( d, "Warning! Null password!\n\r",0 );
            write_to_buffer( d, "Please report old password with bug.\n\r",0);
            write_to_buffer( d,
                "Type 'password null <new password>' to fix.\n\r",0);
        }

        write_to_buffer( d, "n\rKiss our butt's Russ Taylor !!  ( Rom 2.4 Free!)\n\r",0 );
        ch->next        = char_list;
        char_list       = ch;
        d->connected    = CON_PLAYING;
        reset_char(ch);

        if ( ch->level == 0 )
        {

            ch->perm_stat[class_table[ch->class].attr_prime] += 3;

            ch->level   = 1;
            ch->exp     = exp_per_level(ch,ch->pcdata->points);
            ch->hit     = ch->max_hit;
            ch->mana    = ch->max_mana;
            ch->move    = ch->max_move;
            ch->train    = 3;
            ch->practice = 5;
            sprintf( buf, "the %s",
                title_table [ch->class] [ch->level]
                [ch->sex == SEX_FEMALE ? 1 : 0] );
            set_title( ch, buf );

            do_outfit(ch,"");
            obj_to_char(create_object(get_obj_index(OBJ_VNUM_MAP),0),ch);

            char_to_room( ch, get_room_index( ROOM_VNUM_SCHOOL ) );
            send_to_char("\n\r",ch);
            do_help(ch,"NEWBIE INFO");
            send_to_char("\n\r",ch);
        }
        else if ( ch->in_room != NULL )
        {
            char_to_room( ch, ch->in_room );
        }
        else if ( IS_IMMORTAL(ch) )
        {
            char_to_room( ch, get_room_index( ROOM_VNUM_CHAT ) );
        }
        else
        {
            char_to_room( ch, get_room_index( ROOM_VNUM_TEMPLE ) );
        }

        act( "$n has entered the game.", ch, NULL, NULL, TO_ROOM );
        do_look( ch, "auto" );

        wiznet("$N has left real life behind.",ch,NULL,
                WIZ_LOGINS,WIZ_SITES,get_trust(ch));

        if (ch->pet != NULL)
        {
            char_to_room(ch->pet,ch->in_room);
            act("$n has entered the game.",ch->pet,NULL,NULL,TO_ROOM);
        }

        do_unread(ch,"");
        break;
    }

    return;
}



/*
 * Parse a name for acceptability.
 */
bool check_parse_name( char *name )
{
    /*
     * Reserved words.
     */
    if ( is_name( name,
        "all auto immortal self someone something the you demise balance circle loner honor shadow") )
        return FALSE;

    if (str_cmp(capitalize(name),"Rusty") && (!str_prefix("rusty",name)
    || !str_suffix("rusty",name)))
        return FALSE;

    /*
     * Length restrictions.
     */

    if ( strlen(name) <  2 )
        return FALSE;

#if defined(MSDOS)
    if ( strlen(name) >  8 )
        return FALSE;
#endif

#if defined(macintosh) || defined(unix)
    if ( strlen(name) > 12 )
        return FALSE;
#endif

    /*
     * Alphanumerics only.
     * Lock out IllIll twits.
     */
    {
        char *pc;
        bool fIll,adjcaps = FALSE,cleancaps = FALSE;
        int total_caps = 0;

        fIll = TRUE;
        for ( pc = name; *pc != '\0'; pc++ )
        {
            if ( !isalpha(*pc) )
                return FALSE;

            if ( isupper(*pc)) /* ugly anti-caps hack */
            {
                if (adjcaps)
                    cleancaps = TRUE;
                total_caps++;
                adjcaps = TRUE;
            }
            else
                adjcaps = FALSE;

            if ( LOWER(*pc) != 'i' && LOWER(*pc) != 'l' )
                fIll = FALSE;
        }

        if ( fIll )
            return FALSE;

        if (cleancaps || (total_caps > (strlen(name)) / 2 && strlen(name) < 3))
            return FALSE;
    }

    /*
     * Prevent players from naming themselves after mobs.
     */
    {
        extern MOB_INDEX_DATA *mob_index_hash[MAX_KEY_HASH];
        MOB_INDEX_DATA *pMobIndex;
        int iHash;

        for ( iHash = 0; iHash < MAX_KEY_HASH; iHash++ )
        {
            for ( pMobIndex  = mob_index_hash[iHash];
                  pMobIndex != NULL;
                  pMobIndex  = pMobIndex->next )
            {
                if ( is_name( name, pMobIndex->player_name ) )
                    return FALSE;
            }
        }
    }

    return TRUE;
}



/*
 * Look for link-dead player to reconnect.
 */
bool check_reconnect( DESCRIPTOR_DATA *d, char *name, bool fConn )
{
    CHAR_DATA *ch;

    for ( ch = char_list; ch != NULL; ch = ch->next )
    {
        if ( !IS_NPC(ch)
        &&   (!fConn || ch->desc == NULL)
        &&   !str_cmp( d->character->name, ch->name ) )
        {
            if ( fConn == FALSE )
            {
                free_string( d->character->pcdata->pwd );
                d->character->pcdata->pwd = str_dup( ch->pcdata->pwd );
            }
            else
            {
                OBJ_DATA *obj;

                free_char( d->character );
                d->character = ch;
                ch->desc         = d;
                ch->timer        = 0;
                send_to_char(
                    "Reconnecting. Type replay to see missed tells.\n\r", ch );
                act( "$n has reconnected.", ch, NULL, NULL, TO_ROOM );
                if ((obj = get_eq_char(ch,WEAR_LIGHT)) != NULL
                &&  obj->item_type == ITEM_LIGHT && obj->value[2] != 0)
                    --ch->in_room->light;

                sprintf( log_buf, "%s@%s reconnected.", ch->name, d->host );
                log_string( log_buf );
                wiznet("$N groks the fullness of $S link.",
                    ch,NULL,WIZ_LINKS,0,0);
                d->connected = CON_PLAYING;
            }
            return TRUE;
        }
    }

    return FALSE;
}



/*
 * Check if already playing.
 */
bool check_playing( DESCRIPTOR_DATA *d, char *name )
{
    DESCRIPTOR_DATA *dold;

    for ( dold = descriptor_list; dold; dold = dold->next )
    {
        if ( dold != d
        &&   dold->character != NULL
        &&   dold->connected != CON_GET_NAME
        &&   dold->connected != CON_GET_OLD_PASSWORD
        &&   !str_cmp( name, dold->original
                 ? dold->original->name : dold->character->name ) )
        {
            write_to_buffer( d, "That character is already playing.\n\r",0);
            write_to_buffer( d, "Do you wish to connect anyway (Y/N)?",0);
            d->connected = CON_BREAK_CONNECT;
            return TRUE;
        }
    }

    return FALSE;
}



void stop_idling( CHAR_DATA *ch )
{
    if ( ch == NULL
    ||   ch->desc == NULL
    ||   ch->desc->connected != CON_PLAYING
    ||   ch->was_in_room == NULL
    ||   ch->in_room != get_room_index(ROOM_VNUM_LIMBO))
        return;

    ch->timer = 0;
    char_from_room( ch );
    char_to_room( ch, ch->was_in_room );
    ch->was_in_room     = NULL;
    act( "$n has returned from the void.", ch, NULL, NULL, TO_ROOM );
    return;
}



/*
 * Write to one char.
 */
void send_to_char( const char *txt, CHAR_DATA *ch )
{
    if ( txt != NULL && ch->desc != NULL )
        write_to_buffer( ch->desc, txt, strlen(txt) );
    return;
}

/*
 * Send a page to one char.
 */
void page_to_char( const char *txt, CHAR_DATA *ch )
{
    if ( txt == NULL || ch->desc == NULL)


    if (ch->lines == 0 )
    {
        send_to_char(txt,ch);
        return;
    }

#if defined(macintosh)
        send_to_char(txt,ch);
#else
    ch->desc->showstr_head = alloc_mem(strlen(txt) + 1);
    strcpy(ch->desc->showstr_head,txt);
    ch->desc->showstr_point = ch->desc->showstr_head;
    show_string(ch->desc,"");
#endif
}


/* string pager */
void show_string(struct descriptor_data *d, char *input)
{
    char buffer[4*MAX_STRING_LENGTH];
    char buf[MAX_INPUT_LENGTH];
    register char *scan, *chk;
    int lines = 0, toggle = 1;
    int show_lines;

    one_argument(input,buf);
    if (buf[0] != '\0')
    {
        if (d->showstr_head)
        {
            free_string(d->showstr_head);
            d->showstr_head = 0;
        }
        d->showstr_point  = 0;
        return;
    }

    if (d->character)
        show_lines = d->character->lines;
    else
        show_lines = 0;

    for (scan = buffer; ; scan++, d->showstr_point++)
    {
        if (((*scan = *d->showstr_point) == '\n' || *scan == '\r')
            && (toggle = -toggle) < 0)
            lines++;

        else if (!*scan || (show_lines > 0 && lines >= show_lines))
        {
            *scan = '\0';
            write_to_buffer(d,buffer,strlen(buffer));
            for (chk = d->showstr_point; isspace(*chk); chk++);
            {
                if (!*chk)
                {
                    if (d->showstr_head)
                    {
                        free_string(d->showstr_head);
                        d->showstr_head = 0;
                    }
                    d->showstr_point  = 0;
                }
            }
            return;
        }
    }
    return;
}


/* quick sex fixer */
void fix_sex(CHAR_DATA *ch)
{
    if (ch->sex < 0 || ch->sex > 2)
        ch->sex = IS_NPC(ch) ? 0 : ch->pcdata->true_sex;
}

void act (const char *format, CHAR_DATA *ch, const void *arg1, const void *arg2,
          int type)
{
    /* to be compatible with older code */
    act_new(format,ch,arg1,arg2,type,POS_RESTING);
}

void act_new( const char *format, CHAR_DATA *ch, const void *arg1,
              const void *arg2, int type, int min_pos)
{
    static char * const he_she  [] = { "it",  "he",  "she" };
    static char * const him_her [] = { "it",  "him", "her" };
    static char * const his_her [] = { "its", "his", "her" };

    char buf[MAX_STRING_LENGTH];
    char fname[MAX_INPUT_LENGTH];
    CHAR_DATA *to;
    CHAR_DATA *vch = (CHAR_DATA *) arg2;
    OBJ_DATA *obj1 = (OBJ_DATA  *) arg1;
    OBJ_DATA *obj2 = (OBJ_DATA  *) arg2;
    const char *str;
    const char *i;
    char *point;

    /*
     * Discard null and zero-length messages.
     */
    if ( format == NULL || format[0] == '\0' )
        return;

    /* discard null rooms and chars */
    if (ch == NULL || ch->in_room == NULL)
        return;

    to = ch->in_room->people;
    if ( type == TO_VICT )
    {
        if ( vch == NULL )
        {
            bug( "Act: null vch with TO_VICT.", 0 );
            return;
        }

        if (vch->in_room == NULL)
            return;

        to = vch->in_room->people;
    }

    for ( ; to != NULL; to = to->next_in_room )
    {
        if ( to->desc == NULL || to->position < min_pos )
            continue;

        if ( (type == TO_CHAR) && to != ch )
            continue;
        if ( type == TO_VICT && ( to != vch || to == ch ) )
            continue;
        if ( type == TO_ROOM && to == ch )
            continue;
        if ( type == TO_NOTVICT && (to == ch || to == vch) )
            continue;

        point   = buf;
        str     = format;
        while ( *str != '\0' )
        {
            if ( *str != '$' )
            {
                *point++ = *str++;
                continue;
            }
            ++str;

            if ( arg2 == NULL && *str >= 'A' && *str <= 'Z' )
            {
                bug( "Act: missing arg2 for code %d.", *str );
                i = " <@@@> ";
            }
            else
            {
                switch ( *str )
                {
                default:  bug( "Act: bad code %d.", *str );
                          i = " <@@@> ";                                break;
                /* Thx alex for 't' idea */
                case 't': i = (char *) arg1;                            break;
                case 'T': i = (char *) arg2;                            break;
                case 'n': i = PERS( ch,  to  );                         break;
                case 'N': i = PERS( vch, to  );                         break;
                case 'e': i = he_she  [URANGE(0, ch  ->sex, 2)];        break;
                case 'E': i = he_she  [URANGE(0, vch ->sex, 2)];        break;
                case 'm': i = him_her [URANGE(0, ch  ->sex, 2)];        break;
                case 'M': i = him_her [URANGE(0, vch ->sex, 2)];        break;
                case 's': i = his_her [URANGE(0, ch  ->sex, 2)];        break;
                case 'S': i = his_her [URANGE(0, vch ->sex, 2)];        break;

                case 'p':
                    i = can_see_obj( to, obj1 )
                            ? obj1->short_descr
                            : "something";
                    break;

                case 'P':
                    i = can_see_obj( to, obj2 )
                            ? obj2->short_descr
                            : "something";
                    break;

                case 'd':
                    if ( arg2 == NULL || ((char *) arg2)[0] == '\0' )
                    {
                        i = "door";
                    }
                    else
                    {
                        one_argument( (char *) arg2, fname );
                        i = fname;
                    }
                    break;
                }
            }

            ++str;
            while ( ( *point = *i ) != '\0' )
                ++point, ++i;
        }

        *point++ = '\n';
        *point++ = '\r';
        buf[0]   = UPPER(buf[0]);
        write_to_buffer( to->desc, buf, point - buf );
    }

    return;
}



/*
 * Macintosh support functions.
 */
#if defined(macintosh)
int gettimeofday( struct timeval *tp, void *tzp )
{
    tp->tv_sec  = time( NULL );
    tp->tv_usec = 0;
}
#endif