bbs/deb-mbse
Archived
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
This repository has been archived on 2024-04-08. You can view files and clone it, but cannot push or open issues or pull requests.
84e003f13a
deb-mbse/mbtask/taskchat.c
Michiel Broek a1bd379fdd Secured sprintf with snprintf
2005-08-29 21:03:28 +00:00

789 lines
21 KiB
C
Raw Blame History

/*****************************************************************************
*
* $Id$
* Purpose ...............: mbtask - chat server
*
*****************************************************************************
* Copyright (C) 1997-2005
*
* 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"
#include "../lib/mbselib.h"
#include "taskutil.h"
#include "taskregs.h"
#include "taskchat.h"
#include "taskibc.h"
#define MAXMESSAGES 100 /* Maximum ringbuffer for messages */
/*
* 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;
/*
* The buffers
*/
_chat_messages chat_messages[MAXMESSAGES];
int buffer_head = 0; /* Messages buffer head */
extern struct sysconfig CFG; /* System configuration */
extern int s_bbsopen; /* The BBS open status */
extern srv_list *servers; /* Connected servers */
extern usr_list *users; /* Connected users */
extern chn_list *channels; /* Connected channels */
extern int usrchg;
extern int chnchg;
extern int srvchg;
extern pthread_mutex_t b_mutex;
/*
* Prototypes
*/
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*);
void chat_dump(void)
{
int first;
usr_list *tmpu;
first = TRUE;
for (tmpu = users; tmpu; tmpu = tmpu->next) {
if (tmpu->pid) {
if (first) {
Syslog('u', " pid username nick channel sysop");
Syslog('u', "----- ------------------------------------ --------- -------------------- -----");
first = FALSE;
}
Syslog('u', "%5d %-36s %-9s %-20s %s", tmpu->pid, tmpu->realname, tmpu->nick,
tmpu->channel, tmpu->sysop?"True ":"False");
}
}
}
/*
* 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;
snprintf(chat_messages[buffer_head].fromname, 36, "Server");
strncpy(chat_messages[buffer_head].message, msg, 80);
chat_messages[buffer_head].posted = time(NULL);
}
/*
* Shout a message to all users
*/
void system_shout(const char *format, ...)
{
char buf[512];
va_list va_ptr;
usr_list *tmpu;
va_start(va_ptr, format);
vsnprintf(buf, 512, format, va_ptr);
va_end(va_ptr);
for (tmpu = users; tmpu; tmpu = tmpu->next)
if (tmpu->pid) {
system_msg(tmpu->pid, buf);
}
}
/*
* Show help
*/
void chat_help(pid_t pid)
{
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");
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");
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");
system_msg(pid, (char *)"");
system_msg(pid, (char *)" All other input (without a starting /) is sent to the channel.");
}
/*
* Join a channel
*/
int join(pid_t pid, char *channel, int sysop)
{
char buf[81];
chn_list *tmp;
usr_list *tmpu;
Syslog('-', "Join pid %d to channel %s", pid, channel);
if (channels) {
for (tmp = channels; tmp; tmp = tmp->next) {
if (strcmp(tmp->name, channel) == 0) {
for (tmpu = users; tmpu; tmpu = tmpu->next) {
if (tmpu->pid == pid) {
pthread_mutex_lock(&b_mutex);
strncpy(tmpu->channel, channel, 20);
tmp->users++;
pthread_mutex_unlock(&b_mutex);
Syslog('+', "IBC: user %s has joined channel %s", tmpu->nick, channel);
usrchg = TRUE;
srvchg = TRUE;
chnchg = TRUE;
chat_dump();
snprintf(buf, 81, "%s has joined channel %s, now %d users", tmpu->nick, channel, tmp->users);
chat_msg(channel, NULL, buf);
/*
* The sysop channel is private to the system, no broadcast
*/
if (strcasecmp(channel, "#sysop"))
send_all("JOIN %s@%s %s\r\n", tmpu->nick, CFG.myfqdn, channel);
return TRUE;
}
}
}
}
}
/*
* A new channel must be created, but only the sysop may create the "sysop" channel
*/
if (!sysop && (strcasecmp(channel, "#sysop") == 0)) {
snprintf(buf, 81, "*** Only the sysop may create channel \"%s\"", channel);
system_msg(pid, buf);
return FALSE;
}
/*
* No matching channel found, add a new channel.
*/
for (tmpu = users; tmpu; tmpu = tmpu->next) {
if (tmpu->pid == pid) {
if (add_channel(&channels, channel, tmpu->nick, CFG.myfqdn) == 0) {
pthread_mutex_lock(&b_mutex);
strncpy(tmpu->channel, channel, 20);
pthread_mutex_unlock(&b_mutex);
Syslog('+', "IBC: user %s created and joined channel %s", tmpu->nick, channel);
usrchg = TRUE;
chnchg = TRUE;
srvchg = TRUE;
snprintf(buf, 81, "* Created channel %s", channel);
chat_msg(channel, NULL, buf);
chat_dump();
if (strcasecmp(channel, "#sysop"))
send_all("JOIN %s@%s %s\r\n", tmpu->nick, CFG.myfqdn, channel);
return TRUE;
}
}
}
/*
* No matching or free channels
*/
snprintf(buf, 81, "*** Cannot create chat channel %s, no free channels", channel);
system_msg(pid, buf);
Syslog('+', "%s", buf);
return FALSE;
}
/*
* Part from a channel
*/
int part(pid_t pid, char *reason)
{
char buf[81];
chn_list *tmp;
usr_list *tmpu;
if (strlen(reason) > 54)
reason[54] = '\0';
Syslog('-', "Part pid %d from channel, reason %s", pid, reason);
for (tmpu = users; tmpu; tmpu = tmpu->next) {
if ((tmpu->pid == pid) && strlen(tmpu->channel)) {
for (tmp = channels; tmp; tmp = tmp->next) {
if (strcmp(tmp->name, tmpu->channel) == 0) {
/*
* Inform other users
*/
if (reason != NULL) {
chat_msg(tmpu->channel, tmpu->nick, reason);
}
snprintf(buf, 81, "%s has left channel %s, %d users left", tmpu->nick, tmp->name, tmp->users);
chat_msg(tmpu->channel, NULL, buf);
if (strcasecmp(tmp->name, (char *)"#sysop")) {
if (reason && strlen(reason))
send_all("PART %s@%s %s %s\r\n", tmpu->nick, CFG.myfqdn, tmp->name, reason);
else
send_all("PART %s@%s %s\r\n", tmpu->nick, CFG.myfqdn, tmp->name);
}
/*
* Clean channel
*/
pthread_mutex_lock(&b_mutex);
tmp->users--;
pthread_mutex_unlock(&b_mutex);
Syslog('+', "IBC: nick %s leaves channel %s", tmpu->nick, tmp->name);
if (tmp->users == 0) {
/*
* Last user in channel, remove channel
*/
Syslog('+', "IBC: removed channel %s, no more users left", tmp->name);
del_channel(&channels, tmp->name);
chnchg = TRUE;
}
/*
* Update user data
*/
pthread_mutex_lock(&b_mutex);
tmpu->channel[0] = '\0';
pthread_mutex_unlock(&b_mutex);
usrchg = TRUE;
chnchg = TRUE;
srvchg = TRUE;
chat_dump();
return TRUE;
}
}
}
}
return FALSE;
}
void chat_init(void)
{
memset(&chat_messages, 0, sizeof(chat_messages));
}
void chat_cleanuser(pid_t pid)
{
part(pid, (char *)"I'm hanging up!");
}
/*
* Send message into channel
*/
void chat_msg(char *channel, char *nick, char *msg)
{
char buf[128], *logm;
usr_list *tmpu;
if (nick == NULL)
snprintf(buf, 128, "%s", msg);
else
snprintf(buf, 128, "<%s> %s", nick, msg);
if (CFG.iAutoLog && strlen(CFG.chat_log)) {
logm = calloc(PATH_MAX, sizeof(char));
snprintf(logm, PATH_MAX, "%s/log/%s", getenv("MBSE_ROOT"), CFG.chat_log);
ulog(logm, (char *)"+", channel, (char *)"-1", buf);
free(logm);
}
buf[79] = '\0';
for (tmpu = users; tmpu; tmpu = tmpu->next) {
if (strlen(tmpu->channel) && (strcmp(tmpu->channel, channel) == 0)) {
system_msg(tmpu->pid, buf);
}
}
}
/*
* Connect a session to the chatserver.
*/
char *chat_connect(char *data)
{
char *pid, *realname, *nick;
static char buf[200];
int count = 0, sys = FALSE;
srv_list *sl;
usr_list *tmpu;
Syslog('-', "CCON:%s", data);
memset(&buf, 0, sizeof(buf));
if (IsSema((char *)"upsalarm")) {
snprintf(buf, 200, "100:1,*** Power failure, running on UPS;");
return buf;
}
if (s_bbsopen == FALSE) {
snprintf(buf, 200, "100:1,*** The BBS is closed now;");
return buf;
}
/*
* Register with IBC
*/
pid = strtok(data, ","); /* Should be 3 */
pid = strtok(NULL, ","); /* The pid */
realname = strtok(NULL, ","); /* Username */
nick = strtok(NULL, ","); /* Mickname */
sys = atoi(strtok(NULL, ";")); /* Sysop flag */
add_user(&users, CFG.myfqdn, nick, realname);
send_all("USER %s@%s %s\r\n", nick, CFG.myfqdn, realname);
/*
* Now search the added entry to update the data
*/
for (tmpu = users; tmpu; tmpu = tmpu->next) {
if ((strcmp(tmpu->server, CFG.myfqdn) == 0) && (strcmp(tmpu->name, nick) == 0) && (strcmp(tmpu->realname, realname) == 0)) {
/*
* Oke, found
*/
pthread_mutex_lock(&b_mutex);
tmpu->pid = atoi(pid);
tmpu->pointer = buffer_head;
tmpu->sysop = sys;
pthread_mutex_unlock(&b_mutex);
usrchg = TRUE;
srvchg = TRUE;
Syslog('-', "Connected user %s (%s) with chatserver, sysop %s", realname, pid, sys ? "True":"False");
/*
* Now put welcome message into the ringbuffer and report success.
*/
snprintf(buf, 200, "MBSE BBS v%s chat server; type /help for help", VERSION);
system_msg(tmpu->pid, buf);
snprintf(buf, 200, "Welcome to the Internet BBS Chat Network");
system_msg(tmpu->pid, buf);
snprintf(buf, 200, "Current connected servers:");
system_msg(tmpu->pid, buf);
for (sl = servers; sl; sl = sl->next) {
snprintf(buf, 200, " %s (%d user%s)", sl->fullname, sl->users, (sl->users == 1) ? "":"s");
system_msg(tmpu->pid, buf);
count += sl->users;
}
snprintf(buf, 200, "There %s %d user%s connected", (count != 1)?"are":"is", count, (count != 1)?"s":"");
system_msg(tmpu->pid, buf);
snprintf(buf, 200, "100:0;");
return buf;
}
}
snprintf(buf, 200, "100:1,Too many users connected;");
return buf;
}
char *chat_close(char *data)
{
static char buf[200];
char *pid;
usr_list *tmpu;
Syslog('-', "CCLO:%s", data);
memset(&buf, 0, sizeof(buf));
pid = strtok(data, ",");
pid = strtok(NULL, ";");
for (tmpu = users; tmpu; tmpu = tmpu->next) {
if (tmpu->pid == atoi(pid)) {
/*
* Remove from IBC network
*/
send_all("QUIT %s@%s Leaving chat\r\n", tmpu->name, CFG.myfqdn);
del_user(&users, CFG.myfqdn, tmpu->name);
Syslog('-', "Closing chat for pid %s", pid);
snprintf(buf, 200, "100:0;");
return buf;
}
}
Syslog('-', "Pid %s was not connected to chatserver");
snprintf(buf, 200, "100:1,*** ERROR - Not connected to server;");
return buf;
}
char *chat_put(char *data)
{
static char buf[200];
char *pid, *msg, *cmd;
int first, count;
int found;
usr_list *tmpu, *tmp;
chn_list *tmpc;
char temp[81];
Syslog('-', "CPUT:%s", data);
memset(&buf, 0, sizeof(buf));
if (IsSema((char *)"upsalarm")) {
snprintf(buf, 200, "100:2,1,*** Power alarm, running on UPS;");
return buf;
}
if (s_bbsopen == FALSE) {
snprintf(buf, 200, "100:2,1,*** The BBS is closed now;");
return buf;
}
pid = strtok(data, ",");
pid = strtok(NULL, ",");
msg = strtok(NULL, "\0");
msg[strlen(msg)-1] = '\0';
for (tmpu = users; tmpu; tmpu = tmpu->next) {
if (tmpu->pid == atoi(pid)) {
if (msg[0] == '/') {
/*
* A command, process this
*/
if (strncasecmp(msg, "/help", 5) == 0) {
chat_help(atoi(pid));
goto ack;
} else if (strncasecmp(msg, "/echo", 5) == 0) {
snprintf(buf, 200, "%s", msg);
system_msg(tmpu->pid, buf);
goto ack;
} else if ((strncasecmp(msg, "/exit", 5) == 0) ||
(strncasecmp(msg, "/quit", 5) == 0) ||
(strncasecmp(msg, "/bye", 4) == 0)) {
part(tmpu->pid, (char *)"Quitting");
snprintf(buf, 200, "Goodbye");
system_msg(tmpu->pid, buf);
goto hangup;
} else if ((strncasecmp(msg, "/join", 5) == 0) ||
(strncasecmp(msg, "/j ", 3) == 0)) {
cmd = strtok(msg, " \0");
Syslog('-', "\"%s\"", cmd);
cmd = strtok(NULL, "\0");
Syslog('-', "\"%s\"", cmd);
if ((cmd == NULL) || (cmd[0] != '#') || (strcmp(cmd, "#") == 0)) {
snprintf(buf, 200, "** Try /join #channel");
system_msg(tmpu->pid, buf);
} else if (strlen(tmpu->channel)) {
snprintf(buf, 200, "** Cannot join while in a channel");
system_msg(tmpu->pid, buf);
} else {
Syslog('-', "Trying to join channel %s", cmd);
join(tmpu->pid, cmd, tmpu->sysop);
}
chat_dump();
goto ack;
} else if (strncasecmp(msg, "/list", 5) == 0) {
first = TRUE;
for (tmpc = channels; tmpc; tmpc = tmpc->next) {
if (first) {
snprintf(buf, 200, "Cnt Channel name Channel topic");
system_msg(tmpu->pid, buf);
snprintf(buf, 200, "--- -------------------- ------------------------------------------------------");
system_msg(tmpu->pid, buf);
}
first = FALSE;
snprintf(buf, 200, "%3d %-20s %-54s", tmpc->users, tmpc->name, tmpc->topic);
system_msg(tmpu->pid, buf);
}
if (first) {
snprintf(buf, 200, "No active channels to list");
system_msg(tmpu->pid, buf);
}
goto ack;
} else if (strncasecmp(msg, "/names", 6) == 0) {
if (strlen(tmpu->channel)) {
snprintf(buf, 200, "Present in channel %s:", tmpu->channel);
system_msg(tmpu->pid, buf);
snprintf(buf, 200, "Nick Real name Flags");
system_msg(tmpu->pid, buf);
snprintf(buf, 200, "---------------------------------------- ------------------------------ -------");
system_msg(tmpu->pid, buf);
count = 0;
for (tmp = users; tmp; tmp = tmp->next) {
if (strcmp(tmp->channel, tmpu->channel) == 0) {
snprintf(temp, 81, "%s@%s", tmp->nick, tmp->server);
snprintf(buf, 200, "%-40s %-30s %s", temp, tmp->realname,
tmp->sysop ? (char *)"sysop" : (char *)"");
system_msg(tmpu->pid, buf);
count++;
}
}
snprintf(buf, 200, "%d user%s in this channel", count, (count == 1) ?"":"s");
system_msg(tmpu->pid, buf);
} else {
snprintf(buf, 200, "** Not in a channel");
system_msg(tmpu->pid, buf);
}
goto ack;
} else if (strncasecmp(msg, "/nick", 5) == 0) {
cmd = strtok(msg, " \0");
cmd = strtok(NULL, "\0");
if ((cmd == NULL) || (strlen(cmd) == 0) || (strlen(cmd) > 9)) {
snprintf(buf, 200, "** Nickname must be between 1 and 9 characters");
} else {
found = FALSE;
for (tmp = users; tmp; tmp = tmp->next) {
if ((strcmp(tmp->name, cmd) == 0) || (strcmp(tmp->nick, cmd) == 0)) {
found = TRUE;
}
}
if (!found ) {
strncpy(tmpu->nick, cmd, 9);
snprintf(buf, 200, "Nick set to \"%s\"", cmd);
system_msg(tmpu->pid, buf);
send_all("NICK %s %s %s %s\r\n", tmpu->nick, tmpu->name, CFG.myfqdn, tmpu->realname);
usrchg = TRUE;
chat_dump();
goto ack;
}
snprintf(buf, 200, "Can't set nick");
}
system_msg(tmpu->pid, buf);
chat_dump();
goto ack;
} else if (strncasecmp(msg, "/part", 5) == 0) {
cmd = strtok(msg, " \0");
Syslog('-', "\"%s\"", cmd);
cmd = strtok(NULL, "\0");
Syslog('-', "\"%s\"", printable(cmd, 0));
if (part(tmpu->pid, cmd ? cmd : (char *)"Quitting") == FALSE) {
snprintf(buf, 200, "** Not in a channel");
system_msg(tmpu->pid, buf);
}
chat_dump();
goto ack;
} else if (strncasecmp(msg, "/topic", 6) == 0) {
if (strlen(tmpu->channel)) {
snprintf(buf, 200, "** Internal system error");
for (tmpc = channels; tmpc; tmpc = tmpc->next) {
if (strcmp(tmpu->channel, tmpc->name) == 0) {
if ((strcmp(tmpu->name, tmpc->owner) == 0) || (strcmp(tmpu->nick, tmpc->owner) == 0)) {
cmd = strtok(msg, " \0");
cmd = strtok(NULL, "\0");
if ((cmd == NULL) || (strlen(cmd) == 0) || (strlen(cmd) > 54)) {
snprintf(buf, 200, "** Topic must be between 1 and 54 characters");
} else {
strncpy(tmpc->topic, cmd, 54);
snprintf(buf, 200, "Topic set to \"%s\"", cmd);
send_all("TOPIC %s %s\r\n", tmpc->name, tmpc->topic);
}
} else {
snprintf(buf, 200, "** You are not the channel owner");
}
break;
}
}
} else {
snprintf(buf, 200, "** Not in a channel");
}
system_msg(tmpu->pid, buf);
chat_dump();
goto ack;
} else {
/*
* If still here, the command was not recognized.
*/
cmd = strtok(msg, " \t\r\n\0");
snprintf(buf, 200, "*** \"%s\" :Unknown command", cmd+1);
system_msg(tmpu->pid, buf);
goto ack;
}
}
if (strlen(tmpu->channel) == 0) {
/*
* Trying messages while not in a channel
*/
snprintf(buf, 200, "** No channel joined. Try /join #channel");
system_msg(tmpu->pid, buf);
chat_dump();
goto ack;
} else {
chat_msg(tmpu->channel, tmpu->nick, msg);
send_all("PRIVMSG %s <%s> %s\r\n", tmpu->channel, tmpu->nick, msg);
chat_dump();
}
goto ack;
}
}
Syslog('-', "Pid %s was not connected to chatserver");
snprintf(buf, 200, "100:2,1,*** ERROR - Not connected to server;");
return buf;
ack:
snprintf(buf, 200, "100:0;");
return buf;
hangup:
snprintf(buf, 200, "100:2,1,Disconnecting;");
return buf;
}
/*
* Check for a message for the user. Return the message or signal that
* nothing is there to display.
*/
char *chat_get(char *data)
{
static char buf[200];
char *pid;
usr_list *tmpu;
if (IsSema((char *)"upsalarm")) {
snprintf(buf, 200, "100:2,1,*** Power failure, running on UPS;");
return buf;
}
if (s_bbsopen == FALSE) {
snprintf(buf, 200, "100:2,1,*** The BBS is closed now;");
return buf;
}
memset(&buf, 0, sizeof(buf));
pid = strtok(data, ",");
pid = strtok(NULL, ";");
for (tmpu = users; tmpu; tmpu = tmpu->next) {
if (atoi(pid) == tmpu->pid) {
while (tmpu->pointer != buffer_head) {
if (tmpu->pointer < MAXMESSAGES)
tmpu->pointer++;
else
tmpu->pointer = 0;
if (tmpu->pid == chat_messages[tmpu->pointer].topid) {
/*
* Message is for us
*/
snprintf(buf, 200, "100:2,0,%s;", chat_messages[tmpu->pointer].message);
Syslog('-', "%s", buf);
return buf;
}
}
snprintf(buf, 200, "100:0;");
return buf;
}
}
snprintf(buf, 200, "100:2,1,*** ERROR - Not connected to server;");
return buf;
}
/*
* Check for sysop present for forced chat
*/
char *chat_checksysop(char *data)
{
static char buf[20];
char *pid;
usr_list *tmpu;
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 (tmpu = users; tmpu; tmpu = tmpu->next) {
if (atoi(pid) != tmpu->pid) {
if (strlen(tmpu->channel) && (strcasecmp(tmpu->channel, "#sysop") == 0) && tmpu->sysop) {
Syslog('-', "Sending ACK on check");
snprintf(buf, 20, "100:1,1;");
reg_sysoptalk(pid);
return buf;
}
}
}
}
snprintf(buf, 20, "100:1,0;");
return buf;
}
Reference in New Issue View Git Blame Copy Permalink