/*************************************************************************** * Original Diku Mud copyright (C) 1990, 1991 by Sebastian Hammer, * * Michael Seifert, Hans Henrik St{rfeldt, Tom Madsen, and Katja Nyboe. * * * * Merc Diku Mud 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 */ #include <sys/types.h> #include <stdio.h> #include <string.h> #include <stdlib.h> #include <ctype.h> #include <errno.h> #include <sys/time.h> #include "merc.h" /* * 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(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 <arpa/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 fcntl args( ( int fd, int cmd, int arg ) ); 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(linux) int accept args( ( int s, struct sockaddr *addr, int *addrlen ) ); int bind args( ( int s, struct sockaddr *name, int namelen ) ); 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 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 ) ); #endif #if defined(MSDOS) int gettimeofday args( ( struct timeval *tp, void *tzp ) ); int kbhit args( ( void ) ); #endif #if defined(NeXT) #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 ) ); void srandom args( ( long seed ) ); int write args( ( int fd, char *buf, int nbyte ) ); #endif #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 ) ); int setsockopt args( ( int s, int level, int optname, void *optval, int optlen ) ); int socket args( ( int domain, int type, int protocol ) ); void srandom args( ( int seed ) ); 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_free; /* Free list for descriptors */ 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 */ char str_boot_time[MAX_INPUT_LENGTH]; long current_time; /* Time of this pulse */ /* * OS-dependent local functions. */ #if defined(MSDOS) void game_loop_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 new_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 ) ); 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 = now_time.tv_sec; strcpy( str_boot_time, ctime( ¤t_time ) ); srandom( current_time ); /* * 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 ); } } /* * Control socket. */ #if defined(unix) control = init_socket( port ); boot_db( ); sprintf( log_buf, "Merc is ready to rock on port %d.", port ); log_string( log_buf ); game_loop_unix( control ); #endif #if defined(MSDOS) boot_db( ); log_string( "Merc is ready to rock." ); game_loop_msdos( ); #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; 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" ); exit( 1 ); } #if defined(SO_DONTLINGER) { 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" ); 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" ); exit( 1 ); return -1; } if ( listen( fd, 3 ) < 0 ) { perror( "Init_socket: listen" ); exit( 1 ); return -1; } return fd; } #endif #if defined(MSDOS) void game_loop_msdos( void ) { struct timeval last_time; struct timeval now_time; static DESCRIPTOR_DATA dcon; gettimeofday( &last_time, NULL ); current_time = last_time.tv_sec; /* * New_descriptor analogue. */ dcon.descriptor = 0; dcon.connected = CON_GET_NAME; dcon.outsize = 2000; dcon.outbuf = alloc_mem( dcon.outsize ); dcon.host = str_dup( "localhost" ); dcon.next = descriptor_list; descriptor_list = &dcon; /* * Look up the greeting in the help text. */ { extern int top_help; int iHelp; for ( iHelp = 0; iHelp < top_help; iHelp++ ) { if ( is_name( "greeting", help_index[iHelp].keyword ) ) { write_to_buffer( &dcon, help_index[iHelp].text, 0 ); break; } } } /* Main loop */ while ( !merc_down ) { DESCRIPTOR_DATA *d; #if defined(MALLOC_DEBUG) if ( malloc_verify( ) != 1 ) abort( ); #endif /* * Process input. */ for ( d = descriptor_list; d != NULL; d = d_next ) { d_next = d->next; d->fcommand = FALSE; if ( kbhit( ) ) { 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->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 ) interpret( d->character, 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 ) 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 ( kbhit( ) ) { if ( dcon.character != NULL ) dcon.character->timer = 0; if ( !read_from_descriptor( &dcon ) ) { if ( dcon.character != NULL ) save_char_obj( d->character ); dcon.outtop = 0; close_socket( &dcon ); } break; } 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 >= 1000 * 1000 / PULSE_PER_SECOND ) break; } last_time = now_time; current_time = last_time.tv_sec; } return; } #endif #if defined(unix) void game_loop_unix( int control ) { static struct timeval null_time; struct timeval last_time; struct timeval now_time; struct timeval stall_time; signal( SIGPIPE, SIG_IGN ); gettimeofday( &last_time, NULL ); current_time = 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 = MAX( 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 ) ) new_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 ) 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 ) save_char_obj( d->character ); d->outtop = 0; close_socket( d ); continue; } } 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 ) interpret( d->character, 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 ) save_char_obj( d->character ); d->outtop = 0; close_socket( d ); } } } /* * Synchronize to a clock. * Sleep( last_time + 1/PULSE_PER_SECOND - now ). */ gettimeofday( &now_time, NULL ); stall_time.tv_usec = last_time.tv_usec - now_time.tv_usec + (1000 * 1000) / PULSE_PER_SECOND; stall_time.tv_sec = last_time.tv_sec - now_time.tv_sec; if ( stall_time.tv_usec < 0 ) { stall_time.tv_usec += 1000 * 1000; stall_time.tv_sec--; } if ( stall_time.tv_usec >= 1000 * 1000 ) { stall_time.tv_usec -= 1000 * 1000; stall_time.tv_sec++; } if ( stall_time.tv_sec > 0 || ( stall_time.tv_sec == 0 && stall_time.tv_usec > 0 ) ) { if ( select( 0, NULL, NULL, NULL, &stall_time ) < 0 ) { perror( "Game_loop: select: stall" ); exit( 1 ); } } gettimeofday( &last_time, NULL ); current_time = last_time.tv_sec; } return; } #endif #if defined(unix) void new_descriptor( int control ) { static DESCRIPTOR_DATA d_zero; char buf[MAX_STRING_LENGTH]; DESCRIPTOR_DATA *dnew; BAN_DATA *pban; 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( control, F_SETFL, FNDELAY ) == -1 ) { perror( "New_descriptor: fcntl: FNDELAY" ); return; } /* * Cons a new descriptor. */ if ( descriptor_free == NULL ) { dnew = alloc_mem( sizeof(*dnew) ); } else { dnew = descriptor_free; descriptor_free = descriptor_free->next; } *dnew = d_zero; dnew->descriptor = desc; dnew->connected = CON_GET_NAME; 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. */ for ( pban = ban_list; pban != NULL; pban = pban->next ) { if ( !str_cmp( pban->name, dnew->host ) ) { write_to_descriptor( desc, "Your site has been banned from this Mud.\n\r", 0 ); close( desc ); free_mem( dnew->host ); free_mem( dnew->outbuf ); dnew->next = descriptor_free; descriptor_free = dnew; return; } } /* * Init descriptor data. */ dnew->next = descriptor_list; descriptor_list = dnew; /* * Look up the greeting in the help text. */ { extern int top_help; int iHelp; for ( iHelp = 0; iHelp < top_help; iHelp++ ) { if ( is_name( "greeting", help_index[iHelp].keyword ) ) { write_to_buffer( dnew, help_index[iHelp].text, 0 ); break; } } } 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 ); 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_mem( dclose->host ); free_mem( dclose->outbuf ); dclose->next = descriptor_free; descriptor_free = dclose; #if defined(MSDOS) 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. */ 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; } } 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. * Do '!' substitution. */ if ( k == 0 ) d->incomm[k++] = ' '; d->incomm[k] = '\0'; 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 ( fPrompt && !merc_down && d->connected == CON_PLAYING ) { CHAR_DATA *ch; ch = d->original ? d->original : d->character; if ( !IS_SET(ch->act, PLR_NO_BLANK) ) write_to_buffer( d, "\n\r", 2 ); if ( !IS_SET(ch->act, PLR_NO_PROMPT) ) { char buf[40]; ch = d->character; sprintf( buf, "<%dhp %dm %dmv> %s", ch->hit, ch->mana, ch->move, go_ahead_str ); write_to_buffer( d, buf, 0 ); } } /* * Snoop-o-rama. */ if ( d->snoop_by != NULL ) { 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 ) ) return FALSE; /* * Reset buffer top. */ d->outtop = 0; return TRUE; } /* * 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. */ if ( d->outtop + length >= d->outsize ) { char *outbuf; d->outsize = MAX( d->outsize * 2, d->outtop + length + 1 ); outbuf = alloc_mem( d->outsize ); strncpy( outbuf, d->outbuf, d->outtop ); free_mem( d->outbuf ); d->outbuf = outbuf; } /* * Copy. */ strcpy( d->outbuf + d->outtop, txt ); d->outtop += length; return; } bool write_to_descriptor( int desc, char *txt, int length ) { int iStart; int nWrite; #if defined(MSDOS) if ( desc == 0 ) desc = 1; #endif for ( iStart = 0; iStart < length; iStart += nWrite ) { if ( ( nWrite = write( desc, txt + iStart, length - iStart ) ) < 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 ) { char buf[MAX_STRING_LENGTH]; CHAR_DATA *ch; char *pwdnew; char *p; int iClass; 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_reconnect( d, argument, FALSE ) ) { fOld = TRUE; } else { if ( wizlock && ch->level < MAX_LEVEL-4 ) { 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 */ 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(MSDOS) write_to_buffer( d, "\n\r", 2 ); #endif if ( strcmp( crypt( argument, ch->pwd ), ch->pwd ) ) { write_to_buffer( d, "Wrong password.\n\r", 0 ); close_socket( d ); return; } write_to_buffer( d, echo_on_str, 0 ); if ( check_reconnect( d, ch->name, TRUE ) ) return; if ( check_playing( d, ch->name ) ) return; sprintf( log_buf, "%s@%s has connected.", ch->name, d->host ); log_string( log_buf ); do_help( ch, "motd" ); d->connected = CON_READ_MOTD; 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(MSDOS) 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_mem( ch->pwd ); ch->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(MSDOS) write_to_buffer( d, "\n\r", 2 ); #endif if ( strcmp( crypt( argument, ch->pwd ), ch->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, "What is your sex (M/F/N)? ", 0 ); d->connected = CON_GET_NEW_SEX; break; case CON_GET_NEW_SEX: switch ( argument[0] ) { case 'm': case 'M': ch->sex = SEX_MALE; break; case 'f': case 'F': ch->sex = SEX_FEMALE; break; case 'n': case 'N': ch->sex = SEX_NEUTRAL; 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].who_name ); } strcat( buf, "]: " ); write_to_buffer( d, buf, 0 ); d->connected = CON_GET_NEW_CLASS; break; case CON_GET_NEW_CLASS: for ( iClass = 0; iClass < MAX_CLASS; iClass++ ) { if ( !str_cmp( argument, class_table[iClass].who_name ) ) { ch->class = iClass; break; } } if ( iClass == MAX_CLASS ) { write_to_buffer( d, "That's not a class.\n\rWhat IS your class? ", 0 ); return; } sprintf( log_buf, "%s@%s new player.", ch->name, d->host ); log_string( log_buf ); write_to_buffer( d, "\n\r", 2 ); do_help( ch, "motd" ); d->connected = CON_READ_MOTD; break; case CON_READ_MOTD: write_to_buffer( d, "\n\rWelcome to Merc Diku Mud. May your visit here be ... Mercenary.\n\r", 0 ); ch->next = char_list; char_list = ch; d->connected = CON_PLAYING; if ( ch->level == 0 ) { OBJ_DATA *obj; switch ( class_table[ch->class].attr_prime ) { case APPLY_STR: ch->pcdata->perm_str = 16; break; case APPLY_INT: ch->pcdata->perm_int = 16; break; case APPLY_WIS: ch->pcdata->perm_wis = 16; break; case APPLY_DEX: ch->pcdata->perm_dex = 16; break; case APPLY_CON: ch->pcdata->perm_con = 16; break; } ch->level = 1; ch->exp = 1000; ch->hit = ch->max_hit; ch->mana = ch->max_mana; ch->move = ch->max_move; sprintf( buf, "the %s", title_table [ch->class] [ch->level] [ch->sex == SEX_FEMALE ? 1 : 0] ); free_mem( ch->title ); ch->title = str_dup( buf ); obj = create_object( real_object(OBJ_VNUM_SCHOOL_BANNER), 0 ); obj_to_char( obj, ch ); equip_char( ch, obj, WEAR_LIGHT ); obj = create_object( real_object(OBJ_VNUM_SCHOOL_VEST), 0 ); obj_to_char( obj, ch ); equip_char( ch, obj, WEAR_BODY ); obj = create_object( real_object(OBJ_VNUM_SCHOOL_SHIELD), 0 ); obj_to_char( obj, ch ); equip_char( ch, obj, WEAR_SHIELD ); obj = create_object( real_object(class_table[ch->class].weapon), 0 ); obj_to_char( obj, ch ); equip_char( ch, obj, WEAR_WIELD ); char_to_room( ch, real_room( ROOM_VNUM_SCHOOL ) ); } else if ( ch->in_room >= 2 ) { char_to_room( ch, ch->in_room ); } else if ( ch->level >= MAX_LEVEL-3 ) { char_to_room( ch, real_room( ROOM_VNUM_CHAT ) ); } else { char_to_room( ch, real_room( ROOM_VNUM_TEMPLE ) ); } act( "$n has entered the game.", ch, NULL, NULL, TO_ROOM ); do_look( ch, "auto" ); break; } return; } /* * Parse a name for acceptability. */ bool check_parse_name( char *name ) { extern int top_mob; int iMob; bool fIll; /* * Reserved words. */ if ( !str_cmp( name, "All" ) ) return FALSE; if ( !str_cmp( name, "Immortal" ) ) return FALSE; if ( !str_cmp( name, "Someone" ) ) return FALSE; if ( !str_cmp( name, "Me" ) ) return FALSE; if ( !str_cmp( name, "Self" ) ) return FALSE; /* * Length restrictions. */ if ( strlen(name) < 2 ) return FALSE; #if defined(MSDOS) if ( strlen(name) > 8 ) return FALSE; #endif #if defined(unix) if ( strlen(name) > 12 ) return FALSE; #endif /* * Prevent players from naming themselves after mobs. */ for ( iMob = 0; iMob < top_mob; iMob++ ) { if ( is_name( name, mob_index[iMob].player_name ) ) return FALSE; } fIll = TRUE; for ( ; *name != '\0'; name++ ) { if ( !isalpha(*name) ) return FALSE; if ( LOWER(*name) != 'i' && LOWER(*name) != 'l' ) fIll = FALSE; } if ( fIll ) 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) && ch->desc == NULL && !str_cmp( d->character->name, ch->name ) ) { if ( !fConn ) { free_mem( d->character->pwd ); d->character->pwd = str_dup( ch->pwd ); return TRUE; } free_char( d->character ); d->character = ch; ch->desc = d; ch->timer = 0; send_to_char( "Reconnecting.\n\r", ch ); act( "$n has reconnected.", ch, NULL, NULL, TO_ROOM ); sprintf( log_buf, "%s@%s reconnected.", ch->name, d->host ); log_string( log_buf ); d->connected = CON_PLAYING; return TRUE; } } return FALSE; } /* * Check if already playing. */ bool check_playing( DESCRIPTOR_DATA *d, char *name ) { DESCRIPTOR_DATA *dold; for ( dold = descriptor_list; dold; dold = dold->next ) { if ( dold != d && dold->character != NULL && dold->connected != CON_GET_NAME && dold->connected != CON_GET_OLD_PASSWORD && !str_cmp( name, dold->original ? dold->original->name : dold->character->name ) ) { write_to_buffer( d, "Already playing.\n\rName: ", 0 ); d->connected = CON_GET_NAME; if ( d->character != NULL ) { free_char( d->character ); d->character = NULL; } return TRUE; } } return FALSE; } void stop_idling( CHAR_DATA *ch ) { if ( ch == NULL || ch->desc == NULL || ch->desc->connected != CON_PLAYING || ch->was_in_room == NOWHERE ) return; ch->timer = 0; if ( ch->in_room != NOWHERE ) char_from_room( ch ); char_to_room( ch, ch->was_in_room ); ch->was_in_room = NOWHERE; act( "$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; } /* * The primary output interface for formatted output. */ void act( const char *format, CHAR_DATA *ch, OBJ_DATA *obj, const void *vo, int type ) { 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 *vict = (CHAR_DATA *) vo; OBJ_DATA *v_obj = (OBJ_DATA *) vo; const char *str; const char *i; char *point; /* * Discard null and zero-length messages. */ if ( format == NULL || format[0] == '\0' ) return; to = room_index[(type == TO_VICT) ? vict->in_room : ch->in_room].people; for ( ; to != NULL; to = to->next_in_room ) { if ( to->desc == NULL || !IS_AWAKE(to) ) continue; if ( type == TO_CHAR && to != ch ) continue; if ( type == TO_VICT && ( to != vict || to == ch ) ) continue; if ( type == TO_ROOM && to == ch ) continue; if ( type == TO_NOTVICT && (to == ch || to == vict) ) continue; point = buf; str = format; while ( *str != '\0' ) { if ( *str != '$' ) { *point++ = *str++; continue; } str++; switch ( *str ) { default: bug( "Act: bad code %d.", *str ); i = " <@@@> "; break; case 'T': i = (char *) vo; break; case 'n': i = PERS( ch, to ); break; case 'N': i = PERS( vict, to ); break; case 'e': i = he_she [ch ->sex]; break; case 'E': i = he_she [vict ->sex]; break; case 'm': i = him_her [ch ->sex]; break; case 'M': i = him_her [vict ->sex]; break; case 's': i = his_her [ch ->sex]; break; case 'S': i = his_her [vict ->sex]; break; case 'p': i = can_see_obj( to, obj ) ? obj->short_descr : "something"; break; case 'P': i = can_see_obj( to, v_obj ) ? v_obj->short_descr : "something"; break; case 'd': i = ( vo == NULL || ((char *) vo)[0] == '\0' ) ? "door" : ( one_argument( (char *) vo, fname ), 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; }