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comm.c
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comm.c
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/**************************************************************************
* File: comm.c Part of tbaMUD *
* Usage: Communication, socket handling, main(), central game loop. *
* *
* All rights reserved. See license for complete information. *
* *
* Copyright (C) 1993, 94 by the Trustees of the Johns Hopkins University *
* CircleMUD is based on DikuMUD, Copyright (C) 1990, 1991. *
**************************************************************************/
#include "conf.h"
#include "sysdep.h"
/* Begin conf.h dependent includes */
#if CIRCLE_GNU_LIBC_MEMORY_TRACK
# include <mcheck.h>
#endif
#include <iconv.h> // prool
#ifdef CIRCLE_MACINTOSH /* Includes for the Macintosh */
# define SIGPIPE 13
# define SIGALRM 14
/* GUSI headers */
# include <sys/ioctl.h>
/* Codewarrior dependant */
# include <SIOUX.h>
# include <console.h>
#endif
#ifdef CIRCLE_WINDOWS /* Includes for Win32 */
# ifdef __BORLANDC__
# include <dir.h>
# else /* MSVC */
# include <direct.h>
# include <winsock.h>
# endif
# include <mmsystem.h>
#endif /* CIRCLE_WINDOWS */
#ifdef CIRCLE_AMIGA /* Includes for the Amiga */
# include <sys/ioctl.h>
# include <clib/socket_protos.h>
#endif /* CIRCLE_AMIGA */
#ifdef CIRCLE_ACORN /* Includes for the Acorn (RiscOS) */
# include <socklib.h>
# include <inetlib.h>
# include <sys/ioctl.h>
#endif
#ifdef HAVE_ARPA_TELNET_H
#include <arpa/telnet.h>
#else
#include "telnet.h"
#endif
/* end conf.h dependent includes */
/* Note, most includes for all platforms are in sysdep.h. The list of
* files that is included is controlled by conf.h for that platform. */
#include "structs.h"
#include "utils.h"
#include "comm.h"
#include "interpreter.h"
#include "handler.h"
#include "db.h"
#include "house.h"
#include "oasis.h"
#include "genolc.h"
#include "dg_scripts.h"
#include "dg_event.h"
#include "screen.h" /* to support the gemote act type command */
#include "constants.h" /* For mud versions */
#include "boards.h"
#include "act.h"
#include "ban.h"
#include "msgedit.h"
#include "fight.h"
#include "spells.h" /* for affect_update */
#include "modify.h"
#include "quest.h"
#include "ibt.h" /* for free_ibt_lists */
#include "mud_event.h"
#ifndef INVALID_SOCKET
#define INVALID_SOCKET (-1)
#endif
extern time_t motdmod;
extern time_t newsmod;
/* prool's functions */
void send_email2 (char *from, char *to, char *subj, char *text);
void prool_log(char *);
void prool_log_(char *);
void koi_to_utf8(char *str_i, char *str_o);
void utf8_to_koi(char *str_i, char *str_o);
/* locally defined globals, used externally */
struct descriptor_data *descriptor_list = NULL; /* master desc list */
int buf_largecount = 0; /* # of large buffers which exist */
int buf_overflows = 0; /* # of overflows of output */
int buf_switches = 0; /* # of switches from small to large buf */
int circle_shutdown = 0; /* clean shutdown */
int circle_reboot = 0; /* reboot the game after a shutdown */
int no_specials = 0; /* Suppress ass. of special routines */
int scheck = 0; /* for syntax checking mode */
FILE *logfile = NULL; /* Where to send the log messages. */
unsigned long pulse = 0; /* number of pulses since game start */
ush_int port;
socket_t mother_desc;
int next_tick = SECS_PER_MUD_HOUR; /* Tick countdown */
/* used with do_tell and handle_webster_file utility */
long last_webster_teller = -1L;
/* static local global variable declarations (current file scope only) */
static struct txt_block *bufpool = 0; /* pool of large output buffers */
static int max_players = 0; /* max descriptors available */
static int tics_passed = 0; /* for extern checkpointing */
static struct timeval null_time; /* zero-valued time structure */
static byte reread_wizlist; /* signal: SIGUSR1 */
/* normally signal SIGUSR2, currently orphaned in favor of Webster dictionary
* lookup
static byte emergency_unban;
*/
static int dg_act_check; /* toggle for act_trigger */
static bool fCopyOver; /* Are we booting in copyover mode? */
static char *last_act_message = NULL;
static byte webster_file_ready = FALSE;/* signal: SIGUSR2 */
/* static local function prototypes (current file scope only) */
static RETSIGTYPE reread_wizlists(int sig);
/* Appears to be orphaned right now...
static RETSIGTYPE unrestrict_game(int sig);
*/
static RETSIGTYPE reap(int sig);
static RETSIGTYPE checkpointing(int sig);
static RETSIGTYPE hupsig(int sig);
static ssize_t perform_socket_read(socket_t desc, char *read_point,size_t space_left);
static ssize_t perform_socket_write(socket_t desc, const char *txt,size_t length);
static void circle_sleep(struct timeval *timeout);
static int get_from_q(struct txt_q *queue, char *dest, int *aliased);
static void init_game(ush_int port);
static void signal_setup(void);
static socket_t init_socket(ush_int port);
static int new_descriptor(socket_t s);
static int get_max_players(void);
static int process_output(struct descriptor_data *t);
static int process_input(struct descriptor_data *t);
static void timediff(struct timeval *diff, struct timeval *a, struct timeval *b);
static void timeadd(struct timeval *sum, struct timeval *a, struct timeval *b);
static void flush_queues(struct descriptor_data *d);
static void nonblock(socket_t s);
static int perform_subst(struct descriptor_data *t, char *orig, char *subst);
static void record_usage(void);
static char *make_prompt(struct descriptor_data *point);
static void check_idle_passwords(void);
static void init_descriptor (struct descriptor_data *newd, int desc);
static struct in_addr *get_bind_addr(void);
static int parse_ip(const char *addr, struct in_addr *inaddr);
static int set_sendbuf(socket_t s);
static void free_bufpool(void);
static void setup_log(const char *filename, int fd);
static int open_logfile(const char *filename, FILE *stderr_fp);
#if defined(POSIX)
static sigfunc *my_signal(int signo, sigfunc *func);
#endif
/* Webster Dictionary Lookup functions */
static RETSIGTYPE websterlink(int sig);
static void handle_webster_file(void);
static void msdp_update(void); /* KaVir plugin*/
/* externally defined functions, used locally */
#ifdef __CXREF__
#undef FD_ZERO
#undef FD_SET
#undef FD_ISSET
#undef FD_CLR
#define FD_ZERO(x)
#define FD_SET(x, y) 0
#define FD_ISSET(x, y) 0
#define FD_CLR(x, y)
#endif
/* main game loop and related stuff */
#if defined(CIRCLE_WINDOWS) || defined(CIRCLE_MACINTOSH)
/* Windows and Mac do not have gettimeofday, so we'll simulate it. Borland C++
* warns: "Undefined structure 'timezone'" */
void gettimeofday(struct timeval *t, struct timezone *dummy)
{
#if defined(CIRCLE_WINDOWS)
DWORD millisec = GetTickCount();
#elif defined(CIRCLE_MACINTOSH)
unsigned long int millisec;
millisec = (int)((float)TickCount() * 1000.0 / 60.0);
#endif
t->tv_sec = (int) (millisec / 1000);
t->tv_usec = (millisec % 1000) * 1000;
}
#endif /* CIRCLE_WINDOWS || CIRCLE_MACINTOSH */
int main(int argc, char **argv)
{
int pos = 1;
const char *dir;
char prool_buf[200];
snprintf(prool_buf,200,
"========================== MUD started =======================\r\nby Prool, proolix@gmail.com, glorymud.kharkov.org");
prool_log(prool_buf);
//send_email2 ("MUD", "proolix@gmail.com", "MUD started!", "Subj\r\n-- \r\n");
#ifdef MEMORY_DEBUG
zmalloc_init();
#endif
#if CIRCLE_GNU_LIBC_MEMORY_TRACK
mtrace(); /* This must come before any use of malloc(). */
#endif
#ifdef CIRCLE_MACINTOSH
/* ccommand() calls the command line/io redirection dialog box from
* Codewarriors's SIOUX library. */
argc = ccommand(&argv);
/* Initialize the GUSI library calls. */
GUSIDefaultSetup();
#endif
/* Load the game configuration. We must load BEFORE we use any of the
* constants stored in constants.c. Otherwise, there will be no variables
* set to set the rest of the vars to, which will mean trouble --> Mythran */
CONFIG_CONFFILE = NULL;
while ((pos < argc) && (*(argv[pos]) == '-')) {
if (*(argv[pos] + 1) == 'f') {
if (*(argv[pos] + 2))
CONFIG_CONFFILE = argv[pos] + 2;
else if (++pos < argc)
CONFIG_CONFFILE = argv[pos];
else {
puts("SYSERR: File name to read from expected after option -f.");
exit(1);
}
}
pos++;
}
pos = 1;
if (!CONFIG_CONFFILE)
CONFIG_CONFFILE = strdup(CONFIG_FILE);
load_config();
port = CONFIG_DFLT_PORT;
dir = CONFIG_DFLT_DIR;
while ((pos < argc) && (*(argv[pos]) == '-')) {
switch (*(argv[pos] + 1)) {
case 'f':
if (! *(argv[pos] + 2))
++pos;
break;
case 'o':
if (*(argv[pos] + 2))
CONFIG_LOGNAME = argv[pos] + 2;
else if (++pos < argc)
CONFIG_LOGNAME = argv[pos];
else {
puts("SYSERR: File name to log to expected after option -o.");
exit(1);
}
break;
case 'C': /* -C<socket number> - recover from copyover, this is the control socket */
fCopyOver = TRUE;
mother_desc = atoi(argv[pos]+2);
break;
case 'd':
if (*(argv[pos] + 2))
dir = argv[pos] + 2;
else if (++pos < argc)
dir = argv[pos];
else {
puts("SYSERR: Directory arg expected after option -d.");
exit(1);
}
break;
case 'm':
mini_mud = 1;
no_rent_check = 1;
puts("Running in minimized mode & with no rent check.");
break;
case 'c':
scheck = 1;
puts("Syntax check mode enabled.");
break;
case 'q':
no_rent_check = 1;
puts("Quick boot mode -- rent check supressed.");
break;
case 'r':
circle_restrict = 1;
puts("Restricting game -- no new players allowed.");
break;
case 's':
no_specials = 1;
puts("Suppressing assignment of special routines.");
break;
case 'h':
/* From: Anil Mahajan. Do NOT use -C, this is the copyover mode and
* without the proper copyover.dat file, the game will go nuts! */
printf("Usage: %s [-c] [-m] [-q] [-r] [-s] [-d pathname] [port #]\n"
" -c Enable syntax check mode.\n"
" -d <directory> Specify library directory (defaults to 'lib').\n"
" -h Print this command line argument help.\n"
" -m Start in mini-MUD mode.\n"
" -f<file> Use <file> for configuration.\n"
" -o <file> Write log to <file> instead of stderr.\n"
" -q Quick boot (doesn't scan rent for object limits)\n"
" -r Restrict MUD -- no new players allowed.\n"
" -s Suppress special procedure assignments.\n"
" Note: These arguments are 'CaSe SeNsItIvE!!!'\n",
argv[0]
);
exit(0);
default:
printf("SYSERR: Unknown option -%c in argument string.\n", *(argv[pos] + 1));
break;
}
pos++;
}
if (pos < argc) {
if (!isdigit(*argv[pos])) {
printf("Usage: %s [-c] [-m] [-q] [-r] [-s] [-d pathname] [port #]\n", argv[0]);
exit(1);
} else if ((port = atoi(argv[pos])) <= 1024) {
printf("SYSERR: Illegal port number %d.\n", port);
exit(1);
}
}
/* All arguments have been parsed, try to open log file. */
setup_log(CONFIG_LOGNAME, STDERR_FILENO);
/* Moved here to distinguish command line options and to show up
* in the log if stderr is redirected to a file. */
log("Loading configuration.");
log("%s", tbamud_version);
if (chdir(dir) < 0) {
perror("SYSERR: Fatal error changing to data directory");
exit(1);
}
log("Using %s as data directory.", dir);
if (scheck)
boot_world();
else {
log("Running game on port %d.", port);
init_game(port);
}
log("Clearing game world.");
destroy_db();
if (!scheck) {
log("Clearing other memory.");
free_bufpool(); /* comm.c */
free_player_index(); /* players.c */
free_messages(); /* fight.c */
free_text_files(); /* db.c */
board_clear_all(); /* boards.c */
free(cmd_sort_info); /* act.informative.c */
free_command_list(); /* act.informative.c */
free_social_messages(); /* act.social.c */
free_help_table(); /* db.c */
free_invalid_list(); /* ban.c */
free_save_list(); /* genolc.c */
free_strings(&config_info, OASIS_CFG); /* oasis_delete.c */
free_ibt_lists(); /* ibt.c */
free_recent_players(); /* act.informative.c */
free_list(world_events); /* free up our global lists */
free_list(global_lists);
}
if (last_act_message)
free(last_act_message);
/* probably should free the entire config here.. */
free(CONFIG_CONFFILE);
log("Done.");
#ifdef MEMORY_DEBUG
zmalloc_check();
#endif
return (0);
}
/* Reload players after a copyover */
void copyover_recover()
{
struct descriptor_data *d;
FILE *fp;
char host[1024], guiopt[1024];
int desc, i, player_i;
bool fOld;
char name[MAX_INPUT_LENGTH];
long pref;
log ("Copyover recovery initiated");
fp = fopen (COPYOVER_FILE, "r");
/* there are some descriptors open which will hang forever then ? */
if (!fp) {
perror ("copyover_recover:fopen");
log ("Copyover file not found. Exitting.\n\r");
exit (1);
}
/* In case something crashes - doesn't prevent reading */
unlink (COPYOVER_FILE);
/* read boot_time - first line in file */
i = fscanf(fp, "%ld\n", (long *)&boot_time);
if (i != 1)
log("SYSERR: Error reading boot time.");
for (;;) {
fOld = TRUE;
if (fscanf(fp, "%d %ld %s %s %s\n", &desc, &pref, name, host, guiopt) != 5) {
if(!feof(fp)) {
if(ferror(fp))
log("SYSERR: error reading copyover file %s: %s", COPYOVER_FILE, strerror(errno));
else if(!feof(fp))
log("SYSERR: could not scan line in copyover file %s.", COPYOVER_FILE);
exit(1);
}
}
if (desc == -1)
break;
/* Write something, and check if it goes error-free */
if (write_to_descriptor (desc, "\n\rRestoring from copyover...\n\r") < 0) {
close (desc); /* nope */
continue;
}
/* create a new descriptor */
CREATE (d, struct descriptor_data, 1);
memset ((char *) d, 0, sizeof (struct descriptor_data));
init_descriptor (d,desc); /* set up various stuff */
strcpy(d->host, host);
d->next = descriptor_list;
descriptor_list = d;
d->connected = CON_CLOSE;
CopyoverSet(d,guiopt);
/* Now, find the pfile */
CREATE(d->character, struct char_data, 1);
clear_char(d->character);
CREATE(d->character->player_specials, struct player_special_data, 1);
new_mobile_data(d->character);
d->character->desc = d;
if ((player_i = load_char(name, d->character)) >= 0) {
GET_PFILEPOS(d->character) = player_i;
if (!PLR_FLAGGED(d->character, PLR_DELETED)) {
REMOVE_BIT_AR(PLR_FLAGS(d->character), PLR_WRITING);
REMOVE_BIT_AR(PLR_FLAGS(d->character), PLR_MAILING);
REMOVE_BIT_AR(PLR_FLAGS(d->character), PLR_CRYO);
} else
fOld = FALSE;
} else
fOld = FALSE;
/* Player file not found?! */
if (!fOld) {
write_to_descriptor (desc, "\n\rSomehow, your character was lost in the copyover. Sorry.\n\r");
close_socket (d);
} else {
write_to_descriptor (desc, "\n\rCopyover recovery complete.\n\r");
GET_PREF(d->character) = pref;
enter_player_game(d);
/* Clear their load room if it's not persistant. */
if (!PLR_FLAGGED(d->character, PLR_LOADROOM))
GET_LOADROOM(d->character) = NOWHERE;
d->connected = CON_PLAYING;
look_at_room(d->character, 0);
/* Add to the list of 'recent' players (since last reboot) with copyover flag */
if (AddRecentPlayer(GET_NAME(d->character), d->host, FALSE, TRUE) == FALSE)
{
mudlog(BRF, MAX(LVL_IMMORT, GET_INVIS_LEV(d->character)), TRUE, "Failure to AddRecentPlayer (returned FALSE).");
}
}
}
fclose (fp);
}
/* Init sockets, run game, and cleanup sockets */
static void init_game(ush_int local_port)
{
/* We don't want to restart if we crash before we get up. */
touch(KILLSCRIPT_FILE);
circle_srandom(time(0));
log("Finding player limit.");
max_players = get_max_players();
/* If copyover mother_desc is already set up */
if (!fCopyOver) {
log ("Opening mother connection.");
mother_desc = init_socket (local_port);
}
event_init();
/* set up hash table for find_char() */
init_lookup_table();
boot_db();
#if defined(CIRCLE_UNIX) || defined(CIRCLE_MACINTOSH)
log("Signal trapping.");
signal_setup();
#endif
/* If we made it this far, we will be able to restart without problem. */
remove(KILLSCRIPT_FILE);
if (fCopyOver) /* reload players */
copyover_recover();
log("Entering game loop.");
game_loop(mother_desc);
Crash_save_all();
log("Closing all sockets.");
while (descriptor_list)
close_socket(descriptor_list);
CLOSE_SOCKET(mother_desc);
if (circle_reboot != 2)
save_all();
log("Saving current MUD time.");
save_mud_time(&time_info);
if (circle_reboot) {
log("Rebooting.");
exit(52); /* what's so great about HHGTTG, anyhow? */
}
log("Normal termination of game.");
prool_log("Normal termination of game.");
}
/* init_socket sets up the mother descriptor - creates the socket, sets
* its options up, binds it, and listens. */
static socket_t init_socket(ush_int local_port)
{
socket_t s;
struct sockaddr_in sa;
int opt;
#ifdef CIRCLE_WINDOWS
{
WORD wVersionRequested;
WSADATA wsaData;
wVersionRequested = MAKEWORD(1, 1);
if (WSAStartup(wVersionRequested, &wsaData) != 0) {
log("SYSERR: WinSock not available!");
exit(1);
}
/* 4 = stdin, stdout, stderr, mother_desc. Windows might keep sockets and
* files separate, in which case this isn't necessary, but we will err on
* the side of caution. */
if ((wsaData.iMaxSockets - 4) < max_players) {
max_players = wsaData.iMaxSockets - 4;
}
log("Max players set to %d", max_players);
if ((s = socket(PF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) {
log("SYSERR: Error opening network connection: Winsock error #%d",
WSAGetLastError());
exit(1);
}
}
#else
/* Should the first argument to socket() be AF_INET or PF_INET? I don't
* know, take your pick. PF_INET seems to be more widely adopted, and
* Comer (_Internetworking with TCP/IP_) even makes a point to say that
* people erroneously use AF_INET with socket() when they should be using
* PF_INET. However, the man pages of some systems indicate that AF_INET
* is correct; some such as ConvexOS even say that you can use either one.
* All implementations I've seen define AF_INET and PF_INET to be the same
* number anyway, so the point is (hopefully) moot. */
if ((s = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
perror("SYSERR: Error creating socket");
exit(1);
}
#endif /* CIRCLE_WINDOWS */
#if defined(SO_REUSEADDR) && !defined(CIRCLE_MACINTOSH)
opt = 1;
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *) &opt, sizeof(opt)) < 0){
perror("SYSERR: setsockopt REUSEADDR");
exit(1);
}
#endif
set_sendbuf(s);
/* The GUSI sockets library is derived from BSD, so it defines SO_LINGER, even
* though setsockopt() is unimplimented. (from Dean Takemori) */
#if defined(SO_LINGER) && !defined(CIRCLE_MACINTOSH)
{
struct linger ld;
ld.l_onoff = 0;
ld.l_linger = 0;
if (setsockopt(s, SOL_SOCKET, SO_LINGER, (char *) &ld, sizeof(ld)) < 0)
perror("SYSERR: setsockopt SO_LINGER"); /* Not fatal I suppose. */
}
#endif
/* Clear the structure */
memset((char *)&sa, 0, sizeof(sa));
sa.sin_family = AF_INET;
sa.sin_port = htons(local_port);
sa.sin_addr = *(get_bind_addr());
if (bind(s, (struct sockaddr *) &sa, sizeof(sa)) < 0) {
perror("SYSERR: bind");
prool_log("bind error");
CLOSE_SOCKET(s);
exit(1);
}
nonblock(s);
listen(s, 5);
return (s);
}
static int get_max_players(void)
{
#ifndef CIRCLE_UNIX
return (CONFIG_MAX_PLAYING);
#else
int max_descs = 0;
const char *method;
/* First, we'll try using getrlimit/setrlimit. This will probably work
* on most systems. HAS_RLIMIT is defined in sysdep.h. */
#ifdef HAS_RLIMIT
{
struct rlimit limit;
/* find the limit of file descs */
method = "rlimit";
if (getrlimit(RLIMIT_NOFILE, &limit) < 0) {
perror("SYSERR: calling getrlimit");
exit(1);
}
/* set the current to the maximum */
limit.rlim_cur = limit.rlim_max;
if (setrlimit(RLIMIT_NOFILE, &limit) < 0) {
#if defined(__APPLE__) && defined(RLIMIT_NOFILE) && defined(OPEN_MAX)
/* On OS X, setting rlim_cur above OPEN_MAX fails, so try again
* with OPEN_MAX. */
limit.rlim_cur = OPEN_MAX;
#endif
if (setrlimit(RLIMIT_NOFILE, &limit) < 0) {
perror("SYSERR: calling setrlimit");
exit(1);
}
}
#ifdef RLIM_INFINITY
if (limit.rlim_max == RLIM_INFINITY)
max_descs = CONFIG_MAX_PLAYING + NUM_RESERVED_DESCS;
else
max_descs = MIN(CONFIG_MAX_PLAYING + NUM_RESERVED_DESCS, limit.rlim_max);
#else
max_descs = MIN(CONFIG_MAX_PLAYING + NUM_RESERVED_DESCS, limit.rlim_max);
#endif
}
#elif defined (OPEN_MAX) || defined(FOPEN_MAX)
#if !defined(OPEN_MAX)
#define OPEN_MAX FOPEN_MAX
#endif
method = "OPEN_MAX";
max_descs = OPEN_MAX; /* Uh oh.. rlimit didn't work, but we have
* OPEN_MAX */
#elif defined (_SC_OPEN_MAX)
/* Okay, you don't have getrlimit() and you don't have OPEN_MAX. Time to
* try the POSIX sysconf() function. (See Stevens' _Advanced Programming
* in the UNIX Environment_). */
method = "POSIX sysconf";
errno = 0;
if ((max_descs = sysconf(_SC_OPEN_MAX)) < 0) {
if (errno == 0)
max_descs = CONFIG_MAX_PLAYING + NUM_RESERVED_DESCS;
else {
perror("SYSERR: Error calling sysconf");
exit(1);
}
}
#else
/* if everything has failed, we'll just take a guess */
method = "random guess";
max_descs = CONFIG_MAX_PLAYING + NUM_RESERVED_DESCS;
#endif
/* now calculate max _players_ based on max descs */
max_descs = MIN(CONFIG_MAX_PLAYING, max_descs - NUM_RESERVED_DESCS);
if (max_descs <= 0) {
log("SYSERR: Non-positive max player limit! (Set at %d using %s).",
max_descs, method);
exit(1);
}
log(" Setting player limit to %d using %s.", max_descs, method);
return (max_descs);
#endif /* CIRCLE_UNIX */
}
/* game_loop contains the main loop which drives the entire MUD. It
* cycles once every 0.10 seconds and is responsible for accepting new
* new connections, polling existing connections for input, dequeueing
* output and sending it out to players, and calling "heartbeat" functions
* such as mobile_activity(). */
void game_loop(socket_t local_mother_desc)
{
fd_set input_set, output_set, exc_set, null_set;
struct timeval last_time, opt_time, process_time, temp_time;
struct timeval before_sleep, now, timeout;
char comm[MAX_INPUT_LENGTH];
struct descriptor_data *d, *next_d;
int missed_pulses, maxdesc, aliased;
/* initialize various time values */
null_time.tv_sec = 0;
null_time.tv_usec = 0;
opt_time.tv_usec = OPT_USEC;
opt_time.tv_sec = 0;
FD_ZERO(&null_set);
gettimeofday(&last_time, (struct timezone *) 0);
/* The Main Loop. The Big Cheese. The Top Dog. The Head Honcho. The.. */
while (!circle_shutdown) {
/* Sleep if we don't have any connections */
if (descriptor_list == NULL) {
log("No connections. Going to sleep.");
FD_ZERO(&input_set);
FD_SET(local_mother_desc, &input_set);
if (select(local_mother_desc + 1, &input_set, (fd_set *) 0, (fd_set *) 0, NULL) < 0) {
if (errno == EINTR)
log("Waking up to process signal.");
else
perror("SYSERR: Select coma");
} else
log("New connection. Waking up.");
gettimeofday(&last_time, (struct timezone *) 0);
}
/* Set up the input, output, and exception sets for select(). */
FD_ZERO(&input_set);
FD_ZERO(&output_set);
FD_ZERO(&exc_set);
FD_SET(local_mother_desc, &input_set);
maxdesc = local_mother_desc;
for (d = descriptor_list; d; d = d->next) {
#ifndef CIRCLE_WINDOWS
if (d->descriptor > maxdesc)
maxdesc = d->descriptor;
#endif
FD_SET(d->descriptor, &input_set);
FD_SET(d->descriptor, &output_set);
FD_SET(d->descriptor, &exc_set);
}
/* At this point, we have completed all input, output and heartbeat
* activity from the previous iteration, so we have to put ourselves
* to sleep until the next 0.1 second tick. The first step is to
* calculate how long we took processing the previous iteration. */
gettimeofday(&before_sleep, (struct timezone *) 0); /* current time */
timediff(&process_time, &before_sleep, &last_time);
/* If we were asleep for more than one pass, count missed pulses and sleep
* until we're resynchronized with the next upcoming pulse. */
if (process_time.tv_sec == 0 && process_time.tv_usec < OPT_USEC) {
missed_pulses = 0;
} else {
missed_pulses = process_time.tv_sec * PASSES_PER_SEC;
missed_pulses += process_time.tv_usec / OPT_USEC;
process_time.tv_sec = 0;
process_time.tv_usec = process_time.tv_usec % OPT_USEC;
}
/* Calculate the time we should wake up */
timediff(&temp_time, &opt_time, &process_time);
timeadd(&last_time, &before_sleep, &temp_time);
/* Now keep sleeping until that time has come */
gettimeofday(&now, (struct timezone *) 0);
timediff(&timeout, &last_time, &now);
/* Go to sleep */
do {
circle_sleep(&timeout);
gettimeofday(&now, (struct timezone *) 0);
timediff(&timeout, &last_time, &now);
} while (timeout.tv_usec || timeout.tv_sec);
/* Poll (without blocking) for new input, output, and exceptions */
if (select(maxdesc + 1, &input_set, &output_set, &exc_set, &null_time) < 0) {
perror("SYSERR: Select poll");
return;
}
/* If there are new connections waiting, accept them. */
if (FD_ISSET(local_mother_desc, &input_set))
new_descriptor(local_mother_desc);
/* Kick out the freaky folks in the exception set and marked for close */
for (d = descriptor_list; d; d = next_d) {
next_d = d->next;
if (FD_ISSET(d->descriptor, &exc_set)) {
FD_CLR(d->descriptor, &input_set);
FD_CLR(d->descriptor, &output_set);
close_socket(d);
}
}
/* Process descriptors with input pending */
for (d = descriptor_list; d; d = next_d) {
next_d = d->next;
if (FD_ISSET(d->descriptor, &input_set))
{
if ( d->pProtocol != NULL ) /* KaVir's plugin */
d->pProtocol->WriteOOB = 0; /* KaVir's plugin */
if (process_input(d) < 0)
close_socket(d);
}
}
/* Process commands we just read from process_input */
for (d = descriptor_list; d; d = next_d) {
next_d = d->next;
/* Not combined to retain --(d->wait) behavior. -gg 2/20/98 If no wait
* state, no subtraction. If there is a wait state then 1 is subtracted.
* Therefore we don't go less than 0 ever and don't require an 'if'
* bracket. -gg 2/27/99 */
if (d->character) {
GET_WAIT_STATE(d->character) -= (GET_WAIT_STATE(d->character) > 0);
if (GET_WAIT_STATE(d->character))
continue;
}
if (!get_from_q(&d->input, comm, &aliased))
continue;
// printf("prooldebug: comm %s\n", comm);
if (d->character) {
/* Reset the idle timer & pull char back from void if necessary */
d->character->char_specials.timer = 0;
if (STATE(d) == CON_PLAYING && GET_WAS_IN(d->character) != NOWHERE) {
if (IN_ROOM(d->character) != NOWHERE)
char_from_room(d->character);
char_to_room(d->character, GET_WAS_IN(d->character));
GET_WAS_IN(d->character) = NOWHERE;
act("$n has returned.", TRUE, d->character, 0, 0, TO_ROOM);
}
GET_WAIT_STATE(d->character) = 1;
}
d->has_prompt = FALSE;
if (d->showstr_count) /* Reading something w/ pager */
show_string(d, comm);
else if (d->str) /* Writing boards, mail, etc. */
string_add(d, comm);
else if (STATE(d) != CON_PLAYING) /* In menus, etc. */
nanny(d, comm);
else { /* else: we're playing normally. */
if (aliased) /* To prevent recursive aliases. */
d->has_prompt = TRUE; /* To get newline before next cmd output. */
else if (perform_alias(d, comm, sizeof(comm))) /* Run it through aliasing system */
get_from_q(&d->input, comm, &aliased);
command_interpreter(d->character, comm); /* Send it to interpreter */
}
}
/* Send queued output out to the operating system (ultimately to user). */
for (d = descriptor_list; d; d = next_d) {
next_d = d->next;
if (*(d->output) && FD_ISSET(d->descriptor, &output_set)) {
/* Output for this player is ready */
if (process_output(d) < 0)
close_socket(d);
else
d->has_prompt = 1;
}
}
/* Print prompts for other descriptors who had no other output */
for (d = descriptor_list; d; d = d->next) {
if (!d->has_prompt) {
write_to_descriptor(d->descriptor, make_prompt(d));
d->has_prompt = TRUE;
}
}
/* Kick out folks in the CON_CLOSE or CON_DISCONNECT state */
for (d = descriptor_list; d; d = next_d) {
next_d = d->next;
if (STATE(d) == CON_CLOSE || STATE(d) == CON_DISCONNECT)
close_socket(d);
}
/* Now, we execute as many pulses as necessary--just one if we haven't
* missed any pulses, or make up for lost time if we missed a few
* pulses by sleeping for too long. */
missed_pulses++;
if (missed_pulses <= 0) {
log("SYSERR: **BAD** MISSED_PULSES NONPOSITIVE (%d), TIME GOING BACKWARDS!!", missed_pulses);
missed_pulses = 1;
}
/* If we missed more than 30 seconds worth of pulses, just do 30 secs */
if (missed_pulses > 30 RL_SEC) {
log("SYSERR: Missed %d seconds worth of pulses.", missed_pulses / PASSES_PER_SEC);
missed_pulses = 30 RL_SEC;
}
/* Now execute the heartbeat functions */
while (missed_pulses--)
heartbeat(++pulse);
/* Check for any signals we may have received. */
if (reread_wizlist) {
reread_wizlist = FALSE;
mudlog(CMP, LVL_IMMORT, TRUE, "Signal received - rereading wizlists.");
reboot_wizlists();
}
/* Orphaned right now as signal trapping is used for Webster lookup
if (emergency_unban) {
emergency_unban = FALSE;
mudlog(BRF, LVL_IMMORT, TRUE, "Received SIGUSR2 - completely unrestricting game (emergent)");
ban_list = NULL;
circle_restrict = 0;
num_invalid = 0;
}
*/
if (webster_file_ready) {
webster_file_ready = FALSE;
handle_webster_file();
}
#ifdef CIRCLE_UNIX
/* Update tics_passed for deadlock protection (UNIX only) */
tics_passed++;
#endif
}
}