/* ************************************************************************
* File: comm.c Part of CircleMUD *
* Usage: Communication, socket handling, main(), central game loop *
* *
* All rights reserved. See license.doc for complete information. *
* *
* Copyright (C) 1993 by the Trustees of the Johns Hopkins University *
* CircleMUD is based on DikuMUD, Copyright (C) 1990, 1991. *
************************************************************************ */
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <netinet/in.h>
#include <unistd.h>
#include <netdb.h>
#include <string.h>
#include <fcntl.h>
#include <signal.h>
#include <limits.h>
#include "structs.h"
#include "utils.h"
#include "comm.h"
#include "interpreter.h"
#include "handler.h"
#include "db.h"
#include "limits.h"
#define MAX_HOSTNAME 256
#define OPT_USEC 250000 /* time delay corresponding to 4 passes/sec */
/* externs */
extern int restrict;
extern int mini_mud;
extern int no_rent_check;
extern FILE *player_fl;
extern int DFLT_PORT;
extern char *DFLT_DIR;
extern int MAX_PLAYERS;
extern int MAX_DESCRIPTORS_AVAILABLE;
extern struct room_data *world; /* In db.c */
extern int top_of_world; /* In db.c */
extern struct time_info_data time_info; /* In db.c */
extern char help[];
/* local globals */
struct descriptor_data *descriptor_list, *next_to_process;
struct txt_block *bufpool = 0; /* pool of large output buffers */
int buf_largecount; /* # of large buffers which exist */
int buf_overflows; /* # of overflows of output */
int buf_switches; /* # 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 last_desc = 0; /* last unique num assigned to a desc. */
int mother_desc = 0; /* file desc of the mother connection */
int maxdesc; /* highest desc num used */
int avail_descs; /* max descriptors available */
int tics = 0; /* for extern checkpointing */
extern int nameserver_is_slow; /* see config.c */
extern int auto_save; /* see config.c */
extern int autosave_time; /* see config.c */
/* functions in this file */
int get_from_q(struct txt_q *queue, char *dest);
void run_the_game(int port);
void game_loop(int s);
int init_socket(int port);
int new_connection(int s);
int new_descriptor(int s);
int process_output(struct descriptor_data *t);
int process_input(struct descriptor_data *t);
void close_sockets(int s);
void close_socket(struct descriptor_data *d);
struct timeval timediff(struct timeval *a, struct timeval *b);
void flush_queues(struct descriptor_data *d);
void nonblock(int s);
int perform_subst(struct descriptor_data *t, char *orig, char *subst);
/* extern fcnts */
void boot_db(void);
void zone_update(void);
void affect_update(void); /* In spells.c */
void point_update(void); /* In limits.c */
void mobile_activity(void);
void string_add(struct descriptor_data *d, char *str);
void perform_violence(void);
void show_string(struct descriptor_data *d, char *input);
void check_reboot(void);
int isbanned(char *hostname);
void weather_and_time(int mode);
/* *********************************************************************
* main game loop and related stuff *
********************************************************************* */
int main(int argc, char **argv)
{
int port;
char buf[512];
int pos = 1;
char *dir;
port = DFLT_PORT;
dir = DFLT_DIR;
while ((pos < argc) && (*(argv[pos]) == '-')) {
switch (*(argv[pos] + 1)) {
case 'd':
if (*(argv[pos] + 2))
dir = argv[pos] + 2;
else if (++pos < argc)
dir = argv[pos];
else {
log("Directory arg expected after option -d.");
exit(0);
}
break;
case 'm':
mini_mud = 1;
no_rent_check = 1;
log("Running in minimized mode & with no rent check.");
break;
case 'q':
no_rent_check = 1;
log("Quick boot mode -- rent check supressed.");
break;
case 'r':
restrict = 1;
log("Restricting game -- no new players allowed.");
break;
case 's':
no_specials = 1;
log("Suppressing assignment of special routines.");
break;
default:
sprintf(buf, "SYSERR: Unknown option -%c in argument string.", *(argv[pos] + 1));
log(buf);
break;
}
pos++;
}
if (pos < argc)
if (!isdigit(*argv[pos])) {
fprintf(stderr, "Usage: %s [-m] [-q] [-r] [-s] [-d pathname] [ port # ]\n", argv[0]);
exit(0);
}
else if ((port = atoi(argv[pos])) <= 1024) {
printf("Illegal port #\n");
exit(0);
}
sprintf(buf, "Running game on port %d.", port);
log(buf);
if (chdir(dir) < 0) {
perror("Fatal error changing to data directory");
exit(0);
}
sprintf(buf, "Using %s as data directory.", dir);
log(buf);
srandom(time(0));
run_the_game(port);
return(0);
}
/* Init sockets, run game, and cleanup sockets */
void run_the_game(int port)
{
int s;
void signal_setup(void);
descriptor_list = NULL;
log("Signal trapping.");
signal_setup();
log("Opening mother connection.");
mother_desc = s = init_socket(port);
boot_db();
log("Entering game loop.");
game_loop(s);
close_sockets(s);
fclose(player_fl);
if (circle_reboot) {
log("Rebooting.");
exit(52); /* what's so great about HHGTTG, anyhow? */
}
log("Normal termination of game.");
}
/* Accept new connects, relay commands, and call 'heartbeat-functs' */
void game_loop(int s)
{
fd_set input_set, output_set, exc_set;
struct timeval last_time, now, timespent, timeout, null_time;
static struct timeval opt_time;
char comm[MAX_INPUT_LENGTH];
char prompt[MAX_INPUT_LENGTH];
struct descriptor_data *point, *next_point;
int pulse = 0, mins_since_crashsave = 0, mask;
int sockets_connected, sockets_playing;
bool disp;
char buf[100];
null_time.tv_sec = 0;
null_time.tv_usec = 0;
opt_time.tv_usec = OPT_USEC; /* Init time values */
opt_time.tv_sec = 0;
gettimeofday(&last_time, (struct timezone *) 0);
maxdesc = s;
#if defined (OPEN_MAX)
avail_descs = OPEN_MAX - 8;
#elif defined (USE_TABLE_SIZE)
{
int retval;
retval = setdtablesize(64);
if (retval == -1)
log("SYSERR: unable to set table size");
else {
sprintf(buf, "%s %d\n", "dtablesize set to: ", retval);
log(buf);
}
avail_descs = getdtablesize() - 8;
}
#else
avail_descs = MAX_DESCRIPTORS_AVAILABLE;
#endif
avail_descs = MIN(avail_descs, MAX_PLAYERS);
mask = sigmask(SIGUSR1) | sigmask(SIGUSR2) | sigmask(SIGINT) |
sigmask(SIGPIPE) | sigmask(SIGALRM) | sigmask(SIGTERM) |
sigmask(SIGURG) | sigmask(SIGXCPU) | sigmask(SIGHUP) |
sigmask(SIGSEGV) | sigmask(SIGBUS);
/* Main loop */
while (!circle_shutdown) {
/* Check what's happening out there */
FD_ZERO(&input_set);
FD_ZERO(&output_set);
FD_ZERO(&exc_set);
FD_SET(s, &input_set);
for (point = descriptor_list; point; point = point->next) {
FD_SET(point->descriptor, &input_set);
FD_SET(point->descriptor, &exc_set);
FD_SET(point->descriptor, &output_set);
}
/* check out the time */
gettimeofday(&now, (struct timezone *) 0);
timespent = timediff(&now, &last_time);
timeout = timediff(&opt_time, ×pent);
last_time.tv_sec = now.tv_sec + timeout.tv_sec;
last_time.tv_usec = now.tv_usec + timeout.tv_usec;
if (last_time.tv_usec >= 1000000) {
last_time.tv_usec -= 1000000;
last_time.tv_sec++;
}
sigsetmask(mask);
if (select(maxdesc + 1, &input_set, &output_set, &exc_set, &null_time)
< 0) {
perror("Select poll");
return;
}
if (select(0, (fd_set *) 0, (fd_set *) 0, (fd_set *) 0, &timeout) < 0) {
perror("Select sleep");
exit(1);
}
sigsetmask(0);
/* Respond to whatever might be happening */
/* New connection? */
if (FD_ISSET(s, &input_set))
if (new_descriptor(s) < 0)
perror("New connection");
/* kick out the freaky folks */
for (point = descriptor_list; point; point = next_point) {
next_point = point->next;
if (FD_ISSET(point->descriptor, &exc_set)) {
FD_CLR(point->descriptor, &input_set);
FD_CLR(point->descriptor, &output_set);
close_socket(point);
}
}
for (point = descriptor_list; point; point = next_point) {
next_point = point->next;
if (FD_ISSET(point->descriptor, &input_set))
if (process_input(point) < 0)
close_socket(point);
}
/* process_commands; */
for (point = descriptor_list; point; point = next_to_process) {
next_to_process = point->next;
if ((--(point->wait) <= 0) && get_from_q(&point->input, comm)) {
if (point->character && point->connected == CON_PLYNG &&
point->character->specials.was_in_room != NOWHERE) {
if (point->character->in_room != NOWHERE)
char_from_room(point->character);
char_to_room(point->character,
point->character->specials.was_in_room);
point->character->specials.was_in_room = NOWHERE;
act("$n has returned.", TRUE, point->character, 0, 0, TO_ROOM);
}
point->wait = 1;
if (point->character)
point->character->specials.timer = 0;
point->prompt_mode = 1;
if (point->str)
string_add(point, comm);
else if (!point->connected)
if (point->showstr_point)
show_string(point, comm);
else
command_interpreter(point->character, comm);
else
nanny(point, comm);
}
}
for (point = descriptor_list; point; point = next_point) {
next_point = point->next;
if (FD_ISSET(point->descriptor, &output_set) && *(point->output))
if (process_output(point) < 0)
close_socket(point);
else
point->prompt_mode = 1;
}
/* kick out the Phreaky Pholks II -JE */
for (point = descriptor_list; point; point = next_to_process) {
next_to_process = point->next;
if (STATE(point) == CON_CLOSE)
close_socket(point);
}
/* give the people some prompts */
for (point = descriptor_list; point; point = point->next)
if (point->prompt_mode) {
if (point->str) {
write_to_descriptor(point->descriptor, "] ");
} else if (!point->connected) {
if (point->showstr_point) {
write_to_descriptor(point->descriptor, "*** Press return to continue, q to quit ***");
} else {
if (GET_INVIS_LEV(point->character))
sprintf(prompt, "i%d> ", GET_INVIS_LEV(point->character));
else {
strcpy(prompt, "|");
disp = FALSE;
if ((PRF_FLAGGED(point->character, PRF_DISPHP)) ||
((PRF_FLAGGED(point->character, PRF_DISPAUTO) &&
((GET_HIT(point->character) / (float)GET_MAX_HIT(point->character)) <
0.30)))) {
sprintf(prompt, "%s %dH", prompt, GET_HIT(point->character));
disp = TRUE;
}
if ((PRF_FLAGGED(point->character, PRF_DISPMANA)) ||
((PRF_FLAGGED(point->character, PRF_DISPAUTO) &&
((GET_MANA(point->character) / (float)GET_MAX_MANA(point->character)) <
0.30)))) {
sprintf(prompt, "%s %dM", prompt, GET_MANA(point->character));
disp = TRUE;
}
if ((PRF_FLAGGED(point->character, PRF_DISPMOVE)) ||
((PRF_FLAGGED(point->character, PRF_DISPAUTO) &&
((GET_MOVE(point->character) / (float)GET_MAX_MOVE(point->character)) <
0.30)))) {
sprintf(prompt, "%s %dV", prompt, GET_MOVE(point->character));
disp = TRUE;
}
if (disp)
strcat(prompt, " > ");
else
strcpy(prompt, "> ");
}
write_to_descriptor(point->descriptor, prompt);
}
}
point->prompt_mode = 0;
}
/* handle heartbeat stuff */
/* Note: pulse now changes every 1/4 sec */
pulse++;
if (!(pulse % PULSE_ZONE)) zone_update();
if (!(pulse % PULSE_MOBILE)) mobile_activity();
if (!(pulse % PULSE_VIOLENCE)) perform_violence();
if (!(pulse % (SECS_PER_MUD_HOUR * 4))) {
weather_and_time(1);
affect_update();
point_update();
fflush(player_fl);
}
if (auto_save)
if (!(pulse % (60 * 4))) /* one minute */
if (++mins_since_crashsave >= autosave_time) {
mins_since_crashsave = 0;
Crash_save_all();
}
if (!(pulse % 1200)) {
sockets_connected = sockets_playing = 0;
for (point = descriptor_list; point; point = next_point) {
next_point = point->next;
sockets_connected++;
if (!point->connected)
sockets_playing++;
}
sprintf(buf, "nusage: %-3d sockets connected, %-3d sockets playing",
sockets_connected,
sockets_playing);
log(buf);
#ifdef RUSAGE
{
struct rusage rusagedata;
getrusage(0, &rusagedata);
sprintf(buf, "rusage: %d %d %d %d %d %d %d",
rusagedata.ru_utime.tv_sec,
rusagedata.ru_stime.tv_sec,
rusagedata.ru_maxrss,
rusagedata.ru_ixrss,
rusagedata.ru_ismrss,
rusagedata.ru_idrss,
rusagedata.ru_isrss);
log(buf);
}
#endif
}
if (pulse >= 2400) {
pulse = 0;
check_reboot();
}
tics++; /* tics since last checkpoint signal */
}
}
/* ******************************************************************
* general utility stuff (for local use) *
****************************************************************** */
int get_from_q(struct txt_q *queue, char *dest)
{
struct txt_block *tmp;
/* Q empty? */
if (!queue->head)
return(0);
tmp = queue->head;
strcpy(dest, queue->head->text);
queue->head = queue->head->next;
free(tmp->text);
free(tmp);
return(1);
}
void write_to_output(char *txt, struct descriptor_data *t)
{
int size;
size = strlen(txt);
/* if we're in the overflow state already, ignore this */
if (t->bufptr < 0)
return;
/* if we have enough space, just write to buffer and that's it! */
if (t->bufspace >= size) {
strcpy(t->output+t->bufptr, txt);
t->bufspace -= size;
t->bufptr += size;
} else { /* otherwise, try to switch to a large buffer */
if (t->large_outbuf || ((size + strlen(t->output)) > LARGE_BUFSIZE)) {
/* we're already using large buffer, or even the large buffer
in't big enough -- switch to overflow state */
t->bufptr = -1;
buf_overflows++;
return;
}
buf_switches++;
/* if the pool has a buffer in it, grab it */
if (bufpool) {
t->large_outbuf = bufpool;
bufpool = bufpool->next;
} else { /* else create one */
CREATE(t->large_outbuf, struct txt_block, 1);
CREATE(t->large_outbuf->text, char, LARGE_BUFSIZE);
buf_largecount++;
}
strcpy(t->large_outbuf->text, t->output);
t->output = t->large_outbuf->text;
strcat(t->output, txt);
t->bufspace = LARGE_BUFSIZE-1 - strlen(t->output);
t->bufptr = strlen(t->output);
}
}
void write_to_q(char *txt, struct txt_q *queue)
{
struct txt_block *new;
CREATE(new, struct txt_block, 1);
CREATE(new->text, char, strlen(txt) + 1);
strcpy(new->text, txt);
/* Q empty? */
if (!queue->head) {
new->next = NULL;
queue->head = queue->tail = new;
} else {
queue->tail->next = new;
queue->tail = new;
new->next = NULL;
}
}
struct timeval timediff(struct timeval *a, struct timeval *b)
{
struct timeval rslt, tmp;
tmp = *a;
if ((rslt.tv_usec = tmp.tv_usec - b->tv_usec) < 0) {
rslt.tv_usec += 1000000;
--(tmp.tv_sec);
}
if ((rslt.tv_sec = tmp.tv_sec - b->tv_sec) < 0) {
rslt.tv_usec = 0;
rslt.tv_sec = 0;
}
return(rslt);
}
/* Empty the queues before closing connection */
void flush_queues(struct descriptor_data *d)
{
if (d->large_outbuf) {
d->large_outbuf->next = bufpool;
bufpool = d->large_outbuf;
}
while (get_from_q(&d->input, buf2))
;
}
/* ******************************************************************
* socket handling *
****************************************************************** */
int init_socket(int port)
{
int s;
char *opt;
char hostname[MAX_HOSTNAME+1];
struct sockaddr_in sa;
struct hostent *hp;
bzero(&sa, sizeof(struct sockaddr_in ));
gethostname(hostname, MAX_HOSTNAME);
hp = gethostbyname(hostname);
if (hp == NULL) {
perror("gethostbyname");
exit(1);
}
sa.sin_family = hp->h_addrtype;
sa.sin_port = htons(port);
if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
perror("Init-socket");
exit(1);
}
if (setsockopt (s, SOL_SOCKET, SO_REUSEADDR, (char *)&opt, sizeof (opt)) < 0) {
perror ("setsockopt REUSEADDR");
exit (1);
}
#ifdef USE_LINGER
{
struct linger ld;
ld.l_onoff = 0;
ld.l_linger = 1000;
if (setsockopt(s, SOL_SOCKET, SO_LINGER, &ld, sizeof(ld)) < 0) {
perror("setsockopt LINGER");
exit(1);
}
}
#endif
if (bind(s, (struct sockaddr *) & sa, sizeof(sa)) < 0) {
perror("bind");
close(s);
exit(1);
}
listen(s, 3);
return(s);
}
int new_connection(int s)
{
struct sockaddr_in isa;
int i, t;
i = sizeof(isa);
getsockname(s, (struct sockaddr *) & isa, &i);
if ((t = accept(s, (struct sockaddr *)(&isa), &i)) < 0) {
perror("Accept");
return(-1);
}
nonblock(t);
return(t);
}
int new_descriptor(int s)
{
int desc;
struct descriptor_data *newd, *point, *next_point;
int size, sockets_connected, sockets_playing, i;
struct sockaddr_in sock;
struct hostent *from;
extern char *GREETINGS;
if ((desc = new_connection(s)) < 0)
return (-1);
sockets_connected = sockets_playing = 0;
for (point = descriptor_list; point; point = next_point) {
next_point = point->next;
sockets_connected++;
if (!point->connected)
sockets_playing++;
}
/* if ((maxdesc + 1) >= avail_descs) */
if (sockets_connected >= avail_descs) {
write_to_descriptor(desc, "Sorry, CircleMUD is full right now... try again later! :-)\n\r");
close(desc);
return(0);
} else if (desc > maxdesc)
maxdesc = desc;
CREATE(newd, struct descriptor_data, 1);
/* find info */
size = sizeof(sock);
if (getpeername(desc, (struct sockaddr *) & sock, &size) < 0) {
perror("getpeername");
*newd->host = '\0';
} else if (nameserver_is_slow ||
!(from = gethostbyaddr((char *)&sock.sin_addr,
sizeof(sock.sin_addr), AF_INET))) {
if (!nameserver_is_slow)
perror("gethostbyaddr");
i = sock.sin_addr.s_addr;
sprintf(newd->host, "%d.%d.%d.%d", (i & 0x000000FF),
(i & 0x0000FF00) >> 8, (i & 0x00FF0000) >> 16,
(i & 0xFF000000) >> 24 );
} else {
strncpy(newd->host, from->h_name, 49);
*(newd->host + 49) = '\0';
}
if (isbanned(newd->host) == BAN_ALL) {
close(desc);
sprintf(buf2, "Connection attempt denied from [%s]", newd->host);
mudlog(buf2, CMP, LEVEL_GOD, TRUE);
free(newd);
return(0);
}
/* Uncomment this if you want new connections logged. It's usually not
necessary, and just adds a lot of unnecessary bulk to the logs.
sprintf(buf2, "New connection from [%s]", newd->host);
log(buf2);
*/
/* init desc data */
newd->descriptor = desc;
newd->connected = CON_NME;
newd->bad_pws = 0;
newd->pos = -1;
newd->wait = 1;
newd->prompt_mode = 0;
*newd->buf = '\0';
newd->str = 0;
newd->showstr_head = 0;
newd->showstr_point = 0;
*newd->last_input = '\0';
newd->output = newd->small_outbuf;
*(newd->output) = '\0';
newd->bufspace = SMALL_BUFSIZE-1;
newd->large_outbuf = NULL;
newd->input.head = NULL;
newd->next = descriptor_list;
newd->character = 0;
newd->original = 0;
newd->snoop.snooping = 0;
newd->snoop.snoop_by = 0;
newd->login_time = time(0);
if (++last_desc == 1000)
last_desc = 1;
newd->desc_num = last_desc;
/* prepend to list */
descriptor_list = newd;
SEND_TO_Q(GREETINGS, newd);
SEND_TO_Q("By what name do you wish to be known? ", newd);
return(0);
}
int process_output(struct descriptor_data *t)
{
static char i[LARGE_BUFSIZE + 20];
/* start writing at the 2nd space so we can prepend "% " for snoop */
if (!t->prompt_mode && !t->connected) {
strcpy(i+2, "\n\r");
strcat(i+2, t->output);
} else
strcpy(i+2, t->output);
if (t->bufptr < 0)
strcat(i+2, "**OVERFLOW**");
if (!t->connected && !(t->character && !IS_NPC(t->character) &&
PRF_FLAGGED(t->character, PRF_COMPACT)))
strcat(i+2, "\n\r");
if (write_to_descriptor(t->descriptor, i+2) < 0)
return -1;
if (t->snoop.snoop_by) {
i[0] = '%';
i[1] = ' ';
SEND_TO_Q(i, t->snoop.snoop_by->desc);
}
/* if we were using a large buffer, put the large buffer on the buffer
pool and switch back to the small one */
if (t->large_outbuf) {
t->large_outbuf->next = bufpool;
bufpool = t->large_outbuf;
t->large_outbuf = NULL;
t->output = t->small_outbuf;
}
/* reset total bufspace back to that of a small buffer */
t->bufspace = SMALL_BUFSIZE-1;
t->bufptr = 0;
*(t->output) = '\0';
return 1;
}
int write_to_descriptor(int desc, char *txt)
{
int sofar, thisround, total;
total = strlen(txt);
sofar = 0;
do {
thisround = write(desc, txt + sofar, total - sofar);
if (thisround < 0) {
perror("Write to socket");
return(-1);
}
sofar += thisround;
} while (sofar < total);
return(0);
}
int process_input(struct descriptor_data *t)
{
int sofar, thisround, begin, squelch, i, k, flag, failed_subst = 0;
char tmp[MAX_INPUT_LENGTH+2], buffer[MAX_INPUT_LENGTH + 60];
sofar = 0;
flag = 0;
begin = strlen(t->buf);
/* Read in some stuff */
do {
if ((thisround = read(t->descriptor, t->buf + begin + sofar,
MAX_STRING_LENGTH - (begin + sofar) - 1)) > 0)
sofar += thisround;
else if (thisround < 0)
if (errno != EWOULDBLOCK) {
perror("Read1 - ERROR");
return(-1);
}
else
break;
else {
log("EOF encountered on socket read.");
return(-1);
}
} while (!ISNEWL(*(t->buf + begin + sofar - 1)));
*(t->buf + begin + sofar) = 0;
/* if no newline is contained in input, return without proc'ing */
for (i = begin; !ISNEWL(*(t->buf + i)); i++)
if (!*(t->buf + i))
return(0);
/* input contains 1 or more newlines; process the stuff */
for (i = 0, k = 0; *(t->buf + i); ) {
if (!ISNEWL(*(t->buf + i)) && !(flag = (k >= (MAX_INPUT_LENGTH - 2))))
if (*(t->buf + i) == '\b') /* backspace */
if (k) { /* more than one char ? */
if (*(tmp + --k) == '$')
k--;
i++;
}
else
i++; /* no or just one char.. Skip backsp */
else if (isascii(*(t->buf + i)) && isprint(*(t->buf + i))) {
/* trans char, double for '$' (printf) */
if ((*(tmp + k) = *(t->buf + i)) == '$')
*(tmp + ++k) = '$';
k++;
i++;
}
else
i++;
else {
*(tmp + k) = 0;
if (*tmp == '!')
strcpy(tmp, t->last_input);
else if (*tmp == '^') {
if (!(failed_subst = perform_subst(t, t->last_input, tmp)))
strcpy(t->last_input, tmp);
} else
strcpy(t->last_input, tmp);
if (!failed_subst)
write_to_q(tmp, &t->input);
if (t->snoop.snoop_by) {
SEND_TO_Q("% ", t->snoop.snoop_by->desc);
SEND_TO_Q(tmp, t->snoop.snoop_by->desc);
SEND_TO_Q("\n\r", t->snoop.snoop_by->desc);
}
if (flag) {
sprintf(buffer, "Line too long. Truncated to:\n\r%s\n\r", tmp);
if (write_to_descriptor(t->descriptor, buffer) < 0)
return(-1);
/* skip the rest of the line */
for (; !ISNEWL(*(t->buf + i)); i++)
;
}
/* find end of entry */
for (; ISNEWL(*(t->buf + i)); i++)
;
/* squelch the entry from the buffer */
for (squelch = 0; ; squelch++)
if ((*(t->buf + squelch) = *(t->buf + i + squelch)) == '\0')
break;
k = 0;
i = 0;
}
}
return(1);
}
int perform_subst(struct descriptor_data *t, char *orig, char *subst)
{
char new[MAX_INPUT_LENGTH+5];
char *first, *second, *strpos;
first = subst+1;
if (!(second = strchr(first, '^'))) {
SEND_TO_Q("Invalid substitution.\n\r", t);
return 1;
}
*(second++) = '\0';
if (!(strpos = strstr(orig, first))) {
SEND_TO_Q("Invalid substitution.\n\r", t);
return 1;
}
strncpy(new, orig, (strpos-orig));
new[(strpos-orig)] = '\0';
strcat(new, second);
if (((strpos-orig) + strlen(first)) < strlen(orig))
strcat(new, strpos+strlen(first));
strcpy(subst, new);
return 0;
}
void close_sockets(int s)
{
log("Closing all sockets.");
while (descriptor_list)
close_socket(descriptor_list);
close(s);
}
void close_socket(struct descriptor_data *d)
{
struct descriptor_data *tmp;
char buf[100];
close(d->descriptor);
flush_queues(d);
if (d->descriptor == maxdesc)
--maxdesc;
/* Forget snooping */
if (d->snoop.snooping)
d->snoop.snooping->desc->snoop.snoop_by = 0;
if (d->snoop.snoop_by) {
send_to_char("Your victim is no longer among us.\n\r", d->snoop.snoop_by);
d->snoop.snoop_by->desc->snoop.snooping = 0;
}
if (d->character)
if (d->connected == CON_PLYNG) {
save_char(d->character, NOWHERE);
act("$n has lost $s link.", TRUE, d->character, 0, 0, TO_ROOM);
sprintf(buf, "Closing link to: %s.", GET_NAME(d->character));
mudlog(buf, NRM, MAX(LEVEL_IMMORT, GET_INVIS_LEV(d->character)), TRUE);
d->character->desc = 0;
}
else {
sprintf(buf, "Losing player: %s.", GET_NAME(d->character));
mudlog(buf, CMP, MAX(LEVEL_IMMORT, GET_INVIS_LEV(d->character)), TRUE);
free_char(d->character);
}
else
mudlog("Losing descriptor without char.", CMP, LEVEL_IMMORT, TRUE);
if (next_to_process == d) /* to avoid crashing the process loop */
next_to_process = next_to_process->next;
if (d == descriptor_list) /* this is the head of the list */
descriptor_list = descriptor_list->next;
else { /* This is somewhere inside the list */
/* Locate the previous element */
for (tmp = descriptor_list; (tmp->next != d) && tmp; tmp = tmp->next)
;
tmp->next = d->next;
}
if (d->showstr_head)
free(d->showstr_head);
free(d);
}
#if defined(SVR4) || defined(LINUX)
void nonblock(int s)
{
int flags;
flags = fcntl(s, F_GETFL);
flags |= O_NONBLOCK;
if (fcntl(s, F_SETFL, flags) < 0) {
perror("Fatal error executing nonblock (comm.c)");
exit(1);
}
}
#else
void nonblock(int s)
{
if (fcntl(s, F_SETFL, FNDELAY) == -1) {
perror("Fatal error executing nonblock (comm.c)");
exit(1);
}
}
#endif
/* ****************************************************************
* Public routines for system-to-player-communication *
*******************************************************************/
void send_to_char(char *messg, struct char_data *ch)
{
if (ch->desc && messg)
SEND_TO_Q(messg, ch->desc);
}
void send_to_all(char *messg)
{
struct descriptor_data *i;
if (messg)
for (i = descriptor_list; i; i = i->next)
if (!i->connected)
SEND_TO_Q(messg, i);
}
void send_to_outdoor(char *messg)
{
struct descriptor_data *i;
if (messg)
for (i = descriptor_list; i; i = i->next)
if (!i->connected)
if (OUTSIDE(i->character))
SEND_TO_Q(messg, i);
}
void send_to_except(char *messg, struct char_data *ch)
{
struct descriptor_data *i;
if (messg)
for (i = descriptor_list; i; i = i->next)
if (ch->desc != i && !i->connected)
SEND_TO_Q(messg, i);
}
void send_to_room(char *messg, int room)
{
struct char_data *i;
if (messg)
for (i = world[room].people; i; i = i->next_in_room)
if (i->desc)
SEND_TO_Q(messg, i->desc);
}
void send_to_room_except(char *messg, int room, struct char_data *ch)
{
struct char_data *i;
if (messg)
for (i = world[room].people; i; i = i->next_in_room)
if (i != ch && i->desc)
SEND_TO_Q(messg, i->desc);
}
void send_to_room_except_two
(char *messg, int room, struct char_data *ch1, struct char_data *ch2)
{
struct char_data *i;
if (messg)
for (i = world[room].people; i; i = i->next_in_room)
if (i != ch1 && i != ch2 && i->desc)
SEND_TO_Q(messg, i->desc);
}
/* higher-level communication */
void act(char *str, int hide_invisible, struct char_data *ch,
struct obj_data *obj, void *vict_obj, int type)
{
register char *strp, *point, *i;
struct char_data *to;
static char buf[MAX_STRING_LENGTH];
if (!str)
return;
if (!*str)
return;
if (type == TO_VICT)
to = (struct char_data *) vict_obj;
else if (type == TO_CHAR)
to = ch;
else
to = world[ch->in_room].people;
for (; to; to = to->next_in_room) {
if (to->desc && ((to != ch) || (type == TO_CHAR)) &&
(CAN_SEE(to, ch) || !hide_invisible ||
(type == TO_VICT)) && AWAKE(to) &&
!PLR_FLAGGED(to, PLR_WRITING) &&
!((type == TO_NOTVICT) && (to == (struct char_data *) vict_obj))) {
for (strp = str, point = buf; ; )
if (*strp == '$') {
switch (*(++strp)) {
case 'n':
i = PERS(ch, to);
break;
case 'N':
i = PERS((struct char_data *) vict_obj, to);
break;
case 'm':
i = HMHR(ch);
break;
case 'M':
i = HMHR((struct char_data *) vict_obj);
break;
case 's':
i = HSHR(ch);
break;
case 'S':
i = HSHR((struct char_data *) vict_obj);
break;
case 'e':
i = HSSH(ch);
break;
case 'E':
i = HSSH((struct char_data *) vict_obj);
break;
case 'o':
i = OBJN(obj, to);
break;
case 'O':
i = OBJN((struct obj_data *) vict_obj, to);
break;
case 'p':
i = OBJS(obj, to);
break;
case 'P':
i = OBJS((struct obj_data *) vict_obj, to);
break;
case 'a':
i = SANA(obj);
break;
case 'A':
i = SANA((struct obj_data *) vict_obj);
break;
case 'T':
i = (char *) vict_obj;
break;
case 'F':
i = fname((char *) vict_obj);
break;
case '$':
i = "$";
break;
default:
log("SYSERR: Illegal $-code to act():");
strcpy(buf1, "SYSERR: ");
strcat(buf1, str);
log(buf1);
break;
}
while ((*point = *(i++)))
++point;
++strp;
}
else if (!(*(point++) = *(strp++)))
break;
*(--point) = '\n';
*(++point) = '\r';
*(++point) = '\0';
SEND_TO_Q(CAP(buf), to->desc);
}
if ((type == TO_VICT) || (type == TO_CHAR))
return;
}
}