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deb-mbse/mbtask/taskchat.c

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/*****************************************************************************
*
* $Id$
* Purpose ...............: mbtask - chat server
*
*****************************************************************************
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* Copyright (C) 1997-2004
*
* Michiel Broek FIDO: 2:280/2802
* Beekmansbos 10
* 1971 BV IJmuiden
* the Netherlands
*
* This file is part of MBSE BBS.
*
* This BBS is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* MBSE BBS is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MBSE BBS; see the file COPYING. If not, write to the Free
* Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*****************************************************************************/
#include "../config.h"
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#include "../lib/mbselib.h"
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#include "taskutil.h"
#include "taskregs.h"
#include "taskchat.h"
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#include "taskibc.h"
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#define MAXCHANNELS 10 /* Maximum chat channels */
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#define MAXMESSAGES 100 /* Maximum ringbuffer for messages */
typedef enum {CH_FREE, CH_PRIVATE, CH_PUBLIC} CHANNELTYPE;
/*
* Users connected to the chatserver.
*/
typedef struct _ch_user_rec {
pid_t pid; /* User's pid */
char name[36]; /* His name used (may become nick) */
time_t connected; /* Time connected */
int channel; /* Connected channel or -1 */
int pointer; /* Message pointer */
unsigned chatting : 1; /* Is chatting in a channel */
unsigned chanop : 1; /* Is a chanop */
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unsigned sysop : 1; /* User is sysop in channel #sysop */
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} _chat_users;
/*
* Buffer for messages, this is the structure of a ringbuffer which will
* hold all messages, private public etc. There is one global input pointer
* which points to the current head of the ringbuffer. When a user connects
* to a channel, he will get the latest messages in the channel if they
* are present.
*/
typedef struct _chatmsg {
pid_t topid; /* Destination pid of message */
char fromname[36]; /* Message from user */
char message[81]; /* The message to display */
time_t posted; /* Timestamp for posted message */
} _chat_messages;
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/*
* List of channels
*/
typedef struct _channel_rec {
char name[21]; /* Channel name */
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char topic[55]; /* Channel topic */
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pid_t owner; /* Channel owner */
int users; /* Users in channel */
time_t created; /* Creation time */
unsigned active : 1; /* Channel active */
} _channel;
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/*
* List of banned users from a channel. This is a dynamic list.
*/
typedef struct _banned {
int channel; /* Channel the user is banned from */
char user[36]; /* The user who is banned */
} banned_users;
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/*
* The buffers
*/
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_chat_messages chat_messages[MAXMESSAGES];
_chat_users chat_users[MAXCLIENT];
_channel chat_channels[MAXCHANNELS];
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int buffer_head = 0; /* Messages buffer head */
extern struct sysconfig CFG; /* System configuration */
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extern int s_bbsopen; /* The BBS open status */
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/*
* Prototypes
*/
void chat_msg(int, char *, char *);
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void chat_dump(void);
void system_msg(pid_t, char *);
void chat_help(pid_t);
int join(pid_t, char *, int);
int part(pid_t, char*);
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void chat_dump(void)
{
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int i, first;
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first = TRUE;
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for (i = 0; i < MAXCLIENT; i++)
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if (chat_users[i].pid) {
if (first) {
Syslog('u', " pid username ch chats sysop");
Syslog('u', "----- ------------------------------------ -- ----- -----");
first = FALSE;
}
Syslog('u', "%5d %-36s %2d %s %s", chat_users[i].pid, chat_users[i].name, chat_users[i].channel,
chat_users[i].chatting?"True ":"False", chat_users[i].sysop?"True ":"False");
}
first = TRUE;
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for (i = 0; i < MAXCHANNELS; i++)
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if (chat_channels[i].owner) {
if (first) {
Syslog('c', "channel name owner cnt activ");
Syslog('c', "-------------------- ----- --- -----");
first = FALSE;
}
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Syslog('c', "%-20s %5d %3d %s", chat_channels[i].name, chat_channels[i].owner, chat_channels[i].users,
chat_channels[i].active?"True":"False");
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}
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}
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/*
* Put a system message into the chatbuffer
*/
void system_msg(pid_t pid, char *msg)
{
if (buffer_head < MAXMESSAGES)
buffer_head++;
else
buffer_head = 0;
Syslog('-', "system_msg(%d, %s) ptr=%d", pid, msg, buffer_head);
memset(&chat_messages[buffer_head], 0, sizeof(_chat_messages));
chat_messages[buffer_head].topid = pid;
sprintf(chat_messages[buffer_head].fromname, "Server");
strncpy(chat_messages[buffer_head].message, msg, 80);
chat_messages[buffer_head].posted = time(NULL);
}
/*
* Show help
*/
void chat_help(pid_t pid)
{
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system_msg(pid, (char *)" Help topics available:");
system_msg(pid, (char *)"");
system_msg(pid, (char *)" /BYE - Exit from chatserver");
system_msg(pid, (char *)" /ECHO <message> - Echo message to yourself");
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system_msg(pid, (char *)" /EXIT - Exit from chatserver");
system_msg(pid, (char *)" /JOIN #channel - Join or create a channel");
system_msg(pid, (char *)" /J #channel - Join or create a channel");
// system_msg(pid, (char *)" /KICK <nick> - Kick nick out of the channel");
system_msg(pid, (char *)" /LIST - List active channels");
system_msg(pid, (char *)" /NAMES - List nicks in current channel");
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system_msg(pid, (char *)" /NICK <name> - Set new nickname");
system_msg(pid, (char *)" /PART - Leave current channel");
system_msg(pid, (char *)" /QUIT - Exit from chatserver");
system_msg(pid, (char *)" /TOPIC <topic> - Set topic for current channel");
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system_msg(pid, (char *)"");
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system_msg(pid, (char *)" All other input (without a starting /) is sent to the channel.");
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}
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/*
* Join a channel
*/
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int join(pid_t pid, char *channel, int sysop)
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{
int i, j;
char buf[81];
Syslog('-', "Join pid %d to channel %s", pid, channel);
for (i = 0; i < MAXCHANNELS; i++) {
if (strcasecmp(chat_channels[i].name, channel) == 0) {
/*
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* Existing channel, add user to channel.
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*/
chat_channels[i].users++;
for (j = 0; j < MAXCLIENT; j++) {
if (chat_users[j].pid == pid) {
chat_users[j].channel = i;
chat_users[j].chatting = TRUE;
Syslog('-', "Added user %d to channel %d", j, i);
chat_dump();
sprintf(buf, "%s has joined channel #%s, now %d users", chat_users[j].name, channel, chat_channels[i].users);
chat_msg(i, NULL, buf);
return TRUE;
}
}
}
}
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/*
* A new channel must be created, but only the sysop may create the "sysop" channel
*/
if (!sysop && (strcasecmp(channel, "sysop") == 0)) {
sprintf(buf, "*** Only the sysop may create channel \"%s\"", channel);
system_msg(pid, buf);
return FALSE;
}
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/*
* No matching channel found, add a new channel.
*/
for (i = 0; i < MAXCHANNELS; i++) {
if (chat_channels[i].active == FALSE) {
/*
* Got one, register channel.
*/
strncpy(chat_channels[i].name, channel, 20);
chat_channels[i].owner = pid;
chat_channels[i].users = 1;
chat_channels[i].created = time(NULL);
chat_channels[i].active = TRUE;
Syslog('-', "Created channel %d", i);
/*
* Register user to channel
*/
for (j = 0; j < MAXCLIENT; j++) {
if (chat_users[j].pid == pid) {
chat_users[j].channel = i;
chat_users[j].chatting = TRUE;
Syslog('-', "Added user %d to channel %d", j, i);
sprintf(buf, "Created channel #%s", channel);
chat_msg(i, NULL, buf);
}
}
chat_dump();
return TRUE;
}
}
/*
* No matching or free channels
*/
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sprintf(buf, "*** Cannot create chat channel %s, no free channels", channel);
system_msg(pid, buf);
Syslog('+', "%s", buf);
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return FALSE;
}
/*
* Part from a channel
*/
int part(pid_t pid, char *reason)
{
int i;
char buf[81];
Syslog('-', "Part pid %d from channel, reason %s", pid, reason);
for (i = 0; i < MAXCLIENT; i++) {
if ((chat_users[i].pid == pid) && chat_users[i].chatting) {
chat_channels[chat_users[i].channel].users--;
/*
* Inform other users
*/
if (reason != NULL)
chat_msg(chat_users[i].channel, chat_users[i].name, reason);
sprintf(buf, "%s has left channel #%s, %d users left", chat_users[i].name, chat_channels[chat_users[i].channel].name,
chat_channels[chat_users[i].channel].users);
chat_msg(chat_users[i].channel, NULL, buf);
/*
* First clean channel
*/
Syslog('-', "User leaves channel %s", chat_channels[chat_users[i].channel].name);
if (chat_channels[chat_users[i].channel].users == 0) {
/*
* Last user from channel, clear channel
*/
Syslog('-', "Remove channel %s, no more users left", chat_channels[chat_users[i].channel].name);
memset(&chat_channels[chat_users[i].channel], 0, sizeof(_channel));
}
chat_users[i].channel = -1;
chat_users[i].chatting = FALSE;
chat_dump();
return TRUE;
}
}
Syslog('-', "No channel found");
return FALSE;
}
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void chat_init(void)
{
int i;
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memset(&chat_users, 0, sizeof(chat_users));
for (i = 0; i < MAXCLIENT; i++)
chat_users[i].channel = -1;
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memset(&chat_messages, 0, sizeof(chat_messages));
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memset(&chat_channels, 0, sizeof(chat_channels));
}
void chat_cleanuser(pid_t pid)
{
part(pid, (char *)"I'm hanging up!");
}
/*
* Send message into channel
*/
void chat_msg(int channel, char *nick, char *msg)
{
int i;
char buf[128], *logm;
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if (nick == NULL)
sprintf(buf, "%s", msg);
else
sprintf(buf, "<%s> %s", nick, msg);
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if (CFG.iAutoLog && strlen(CFG.chat_log)) {
logm = calloc(PATH_MAX, sizeof(char));
sprintf(logm, "%s/log/%s", getenv("MBSE_ROOT"), CFG.chat_log);
ulog(logm, (char *)"+", chat_channels[channel].name, (char *)"-1", buf);
free(logm);
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}
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buf[79] = '\0';
for (i = 0; i < MAXCLIENT; i++) {
if ((chat_users[i].channel == channel) && chat_users[i].chatting) {
system_msg(chat_users[i].pid, buf);
}
}
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#ifdef USE_EXPERIMENT
send_all(buf);
#endif
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}
/*
* Connect a session to the chatserver.
*/
char *chat_connect(char *data)
{
char *pid, *usr;
static char buf[200];
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int i, j, count = 0, sys = FALSE;
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Syslog('-', "CCON:%s", data);
memset(&buf, 0, sizeof(buf));
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if (IsSema((char *)"upsalarm")) {
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sprintf(buf, "100:1,*** Power failure, running on UPS;");
return buf;
}
if (s_bbsopen == FALSE) {
sprintf(buf, "100:1,*** The BBS is closed now;");
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return buf;
}
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/*
* Search free userslot
*/
for (i = 0; i < MAXCLIENT; i++) {
if (chat_users[i].pid == 0) {
/*
* Oke, found
*/
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pid = strtok(data, ","); /* Should be 3 */
pid = strtok(NULL, ","); /* The pid */
usr = strtok(NULL, ","); /* Username */
sys = atoi(strtok(NULL, ";")); /* Sysop flag */
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chat_users[i].pid = atoi(pid);
strncpy(chat_users[i].name, usr, 36);
chat_users[i].connected = time(NULL);
chat_users[i].pointer = buffer_head;
chat_users[i].channel = -1;
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chat_users[i].sysop = sys;
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Syslog('-', "Connected user %s (%s) with chatserver, slot %d, sysop %s", usr, pid, i, sys ? "True":"False");
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/*
* Now put welcome message into the ringbuffer and report success.
*/
sprintf(buf, "MBSE BBS v%s chat server; type /help for help", VERSION);
system_msg(chat_users[i].pid, buf);
sprintf(buf, "Welcome to the %s chat network", CFG.bbs_name);
system_msg(chat_users[i].pid, buf);
for (j = 0; j < MAXCLIENT; j++)
if (chat_users[j].pid)
count++;
sprintf(buf, "There %s %d user%s connected", (count != 1)?"are":"is", count, (count != 1)?"s":"");
system_msg(chat_users[i].pid, buf);
sprintf(buf, "100:0;");
return buf;
}
}
sprintf(buf, "100:1,Too many users connected;");
return buf;
}
char *chat_close(char *data)
{
static char buf[200];
char *pid;
int i;
Syslog('-', "CCLO:%s", data);
memset(&buf, 0, sizeof(buf));
pid = strtok(data, ",");
pid = strtok(NULL, ";");
for (i = 0; i < MAXCLIENT; i++) {
if (chat_users[i].pid == atoi(pid)) {
Syslog('-', "Closing chat for pid %s, slot %d", pid, i);
memset(&chat_users[i], 0, sizeof(_chat_users));
chat_users[i].channel = -1;
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sprintf(buf, "100:0;");
return buf;
}
}
Syslog('-', "Pid %s was not connected to chatserver");
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sprintf(buf, "100:1,*** ERROR - Not connected to server;");
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return buf;
}
char *chat_put(char *data)
{
static char buf[200];
char *pid, *msg, *cmd;
int i, j, first, count;
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Syslog('-', "CPUT:%s", data);
memset(&buf, 0, sizeof(buf));
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if (IsSema((char *)"upsalarm")) {
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sprintf(buf, "100:2,1,*** Power alarm, running on UPS;");
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return buf;
}
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if (s_bbsopen == FALSE) {
sprintf(buf, "100:2,1,*** The BBS is closed now;");
return buf;
}
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pid = strtok(data, ",");
pid = strtok(NULL, ",");
msg = strtok(NULL, "\0");
msg[strlen(msg)-1] = '\0';
for (i = 0; i < MAXCLIENT; i++) {
if (chat_users[i].pid == atoi(pid)) {
if (msg[0] == '/') {
/*
* A command, process this
*/
if (strncasecmp(msg, "/help", 5) == 0) {
chat_help(atoi(pid));
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goto ack;
} else if (strncasecmp(msg, "/echo", 5) == 0) {
sprintf(buf, "%s", msg);
system_msg(chat_users[i].pid, buf);
goto ack;
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} else if ((strncasecmp(msg, "/exit", 5) == 0) ||
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(strncasecmp(msg, "/quit", 5) == 0) ||
(strncasecmp(msg, "/bye", 4) == 0)) {
part(chat_users[i].pid, (char *)"Quitting");
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sprintf(buf, "Goodbye");
system_msg(chat_users[i].pid, buf);
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goto hangup;
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} else if ((strncasecmp(msg, "/join", 5) == 0) ||
(strncasecmp(msg, "/j ", 3) == 0)) {
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cmd = strtok(msg, " \0");
Syslog('-', "\"%s\"", cmd);
cmd = strtok(NULL, "\0");
Syslog('-', "\"%s\"", cmd);
if ((cmd == NULL) || (cmd[0] != '#') || (strcmp(cmd, "#") == 0)) {
sprintf(buf, "** Try /join #channel");
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system_msg(chat_users[i].pid, buf);
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} else if (chat_users[i].channel != -1) {
sprintf(buf, "** Cannot join while in a channel");
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system_msg(chat_users[i].pid, buf);
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} else {
Syslog('-', "Trying to join channel %s", cmd);
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join(chat_users[i].pid, cmd+1, chat_users[i].sysop);
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}
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chat_dump();
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goto ack;
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} else if (strncasecmp(msg, "/list", 5) == 0) {
first = TRUE;
for (j = 0; j < MAXCHANNELS; j++) {
if (chat_channels[j].owner && chat_channels[j].active) {
if (first) {
sprintf(buf, "Cnt Channel name Channel topic");
system_msg(chat_users[i].pid, buf);
sprintf(buf, "--- -------------------- ------------------------------------------------------");
system_msg(chat_users[i].pid, buf);
}
first = FALSE;
sprintf(buf, "%3d %-20s %-54s", chat_channels[j].users, chat_channels[j].name, chat_channels[j].topic);
system_msg(chat_users[i].pid, buf);
}
}
if (first) {
sprintf(buf, "No active channels to list");
system_msg(chat_users[i].pid, buf);
}
goto ack;
} else if (strncasecmp(msg, "/names", 6) == 0) {
if (chat_users[i].channel != -1) {
sprintf(buf, "Present in this channel:");
system_msg(chat_users[i].pid, buf);
count = 0;
for (j = 0; j < MAXCLIENT; j++) {
if ((chat_users[j].channel == chat_users[i].channel) && chat_users[j].pid) {
sprintf(buf, "%s %s", chat_users[j].name,
chat_users[j].chanop ?"(chanop)": chat_users[j].sysop ?"(sysop)":"");
system_msg(chat_users[i].pid, buf);
count++;
}
}
sprintf(buf, "%d user%s in this channel", count, (count == 1) ?"":"s");
system_msg(chat_users[i].pid, buf);
} else {
sprintf(buf, "** Not in a channel");
system_msg(chat_users[i].pid, buf);
}
goto ack;
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} else if (strncasecmp(msg, "/nick", 5) == 0) {
cmd = strtok(msg, " \0");
cmd = strtok(NULL, "\0");
if ((cmd == NULL) || (strlen(cmd) == 0) || (strlen(cmd) > 36)) {
sprintf(buf, "** Nickname must be between 1 and 36 characters");
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} else {
strncpy(chat_users[i].name, cmd, 36);
sprintf(buf, "Nick set to \"%s\"", cmd);
}
system_msg(chat_users[i].pid, buf);
chat_dump();
goto ack;
} else if (strncasecmp(msg, "/part", 5) == 0) {
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cmd = strtok(msg, " \0");
Syslog('-', "\"%s\"", cmd);
cmd = strtok(NULL, "\0");
Syslog('-', "\"%s\"", cmd);
if (part(chat_users[i].pid, cmd) == FALSE) {
sprintf(buf, "** Not in a channel");
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system_msg(chat_users[i].pid, buf);
}
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chat_dump();
goto ack;
} else if (strncasecmp(msg, "/topic", 6) == 0) {
if (chat_users[i].channel != -1) {
if (chat_channels[chat_users[i].channel].owner == chat_users[i].pid) {
cmd = strtok(msg, " \0");
cmd = strtok(NULL, "\0");
if ((cmd == NULL) || (strlen(cmd) == 0) || (strlen(cmd) > 36)) {
sprintf(buf, "** Topic must be between 1 and 54 characters");
} else {
strncpy(chat_channels[chat_users[i].channel].topic, cmd, 54);
sprintf(buf, "Topic set to \"%s\"", cmd);
}
} else {
sprintf(buf, "** You are not the channel owner");
}
} else {
sprintf(buf, "** Not in a channel");
}
system_msg(chat_users[i].pid, buf);
chat_dump();
goto ack;
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} else {
/*
* If still here, the command was not recognized.
*/
cmd = strtok(msg, " \t\r\n\0");
sprintf(buf, "*** \"%s\" :Unknown command", cmd+1);
system_msg(chat_users[i].pid, buf);
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goto ack;
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}
}
if (chat_users[i].channel == -1) {
/*
* Trying messages while not in a channel
*/
sprintf(buf, "** No channel joined. Try /join #channel");
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system_msg(chat_users[i].pid, buf);
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chat_dump();
goto ack;
} else {
chat_msg(chat_users[i].channel, chat_users[i].name, msg);
chat_dump();
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}
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goto ack;
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}
}
Syslog('-', "Pid %s was not connected to chatserver");
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sprintf(buf, "100:2,1,*** ERROR - Not connected to server;");
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return buf;
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ack:
sprintf(buf, "100:0;");
return buf;
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hangup:
sprintf(buf, "100:2,1,Disconnecting;");
return buf;
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}
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/*
* Check for a message for the user. Return the message or signal that
* nothing is there to display.
*/
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char *chat_get(char *data)
{
static char buf[200];
char *pid;
int i;
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if (IsSema((char *)"upsalarm")) {
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sprintf(buf, "100:2,1,*** Power failure, running on UPS;");
return buf;
}
if (s_bbsopen == FALSE) {
sprintf(buf, "100:2,1,*** The BBS is closed now;");
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return buf;
}
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memset(&buf, 0, sizeof(buf));
pid = strtok(data, ",");
pid = strtok(NULL, ";");
for (i = 0; i < MAXCLIENT; i++) {
if (atoi(pid) == chat_users[i].pid) {
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/*
* First check if we are a normal user in the sysop channel
*/
// if ((! chat_users[i].sysop) && (strcasecmp(channels[chat_users[i].channel].name, "sysop") == 0)) {
// }
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while (chat_users[i].pointer != buffer_head) {
if (chat_users[i].pointer < MAXMESSAGES)
chat_users[i].pointer++;
else
chat_users[i].pointer = 0;
if (chat_users[i].pid == chat_messages[chat_users[i].pointer].topid) {
/*
* Message is for us.
*/
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sprintf(buf, "100:2,0,%s;", chat_messages[chat_users[i].pointer].message);
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Syslog('-', "%s", buf);
return buf;
}
}
sprintf(buf, "100:0;");
return buf;
}
}
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sprintf(buf, "100:2,1,*** ERROR - Not connected to server;");
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return buf;
}
/*
* Check for sysop present for forced chat
*/
char *chat_checksysop(char *data)
{
static char buf[20];
char *pid;
int i;
memset(&buf, 0, sizeof(buf));
pid = strtok(data, ",");
pid = strtok(NULL, ";");
if (reg_ispaging(pid)) {
Syslog('-', "Check sysopchat for pid %s, user has paged", pid);
/*
* Now check if sysop is present in the sysop channel
*/
for (i = 0; i < MAXCLIENT; i++) {
if (atoi(pid) != chat_users[i].pid) {
if (chat_users[i].chatting && chat_users[i].sysop) {
Syslog('-', "Sending ACK on check");
sprintf(buf, "100:1,1;");
reg_sysoptalk(pid);
return buf;
}
}
}
}
sprintf(buf, "100:1,0;");
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return buf;
}