/***************************************************************************** * * $Id$ * Purpose ...............: mbtask - chat server * ***************************************************************************** * Copyright (C) 1997-2003 * * 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 "libs.h" #include "../lib/structs.h" #include "taskutil.h" #include "taskregs.h" #include "taskchat.h" #define MAXCHANNELS 10 /* Maximum chat channels */ #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 */ unsigned sysop : 1; /* User is sysop in channel #sysop */ } _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; /* * List of channels */ typedef struct _channel_rec { char name[21]; /* Channel name */ char topic[55]; /* Channel topic */ pid_t owner; /* Channel owner */ int users; /* Users in channel */ time_t created; /* Creation time */ unsigned active : 1; /* Channel active */ } _channel; /* * 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; /* * The buffers */ _chat_messages chat_messages[MAXMESSAGES]; _chat_users chat_users[MAXCLIENT]; _channel chat_channels[MAXCHANNELS]; int buffer_head = 0; /* Messages buffer head */ extern struct sysconfig CFG; /* System configuration */ extern int s_bbsopen; /* The BBS open status */ /* * Prototypes */ void chat_msg(int, char *, char *); 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 i, first; first = TRUE; for (i = 0; i < MAXCLIENT; i++) 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; for (i = 0; i < MAXCHANNELS; i++) if (chat_channels[i].owner) { if (first) { Syslog('c', "channel name owner cnt activ"); Syslog('c', "-------------------- ----- --- -----"); first = FALSE; } Syslog('c', "%-20s %5d %3d %s", chat_channels[i].name, chat_channels[i].owner, chat_channels[i].users, chat_channels[i].active?"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; 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) { 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) { 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) { /* * Existing channel, add user to channel. */ 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; } } } } /* * 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; } /* * 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 */ sprintf(buf, "*** 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) { 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; } void chat_init(void) { int i; memset(&chat_users, 0, sizeof(chat_users)); for (i = 0; i < MAXCLIENT; i++) chat_users[i].channel = -1; memset(&chat_messages, 0, sizeof(chat_messages)); 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; if (nick == NULL) sprintf(buf, "%s", msg); else sprintf(buf, "<%s> %s", nick, msg); 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); } 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); } } } /* * Connect a session to the chatserver. */ char *chat_connect(char *data) { char *pid, *usr; static char buf[200]; int i, j, count = 0, sys = FALSE; Syslog('-', "CCON:%s", data); memset(&buf, 0, sizeof(buf)); if (IsSema((char *)"upsalarm")) { sprintf(buf, "100:1,*** Power failure, running on UPS;"); return buf; } if (s_bbsopen == FALSE) { sprintf(buf, "100:1,*** The BBS is closed now;"); return buf; } /* * Search free userslot */ for (i = 0; i < MAXCLIENT; i++) { if (chat_users[i].pid == 0) { /* * Oke, found */ pid = strtok(data, ","); /* Should be 3 */ pid = strtok(NULL, ","); /* The pid */ usr = strtok(NULL, ","); /* Username */ sys = atoi(strtok(NULL, ";")); /* Sysop flag */ 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; chat_users[i].sysop = sys; Syslog('-', "Connected user %s (%s) with chatserver, slot %d, sysop %s", usr, pid, i, sys ? "True":"False"); /* * 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; sprintf(buf, "100:0;"); return buf; } } Syslog('-', "Pid %s was not connected to chatserver"); sprintf(buf, "100:1,*** ERROR - Not connected to server;"); return buf; } char *chat_put(char *data) { static char buf[200]; char *pid, *msg, *cmd; int i, j, first, count; Syslog('-', "CPUT:%s", data); memset(&buf, 0, sizeof(buf)); if (IsSema((char *)"upsalarm")) { sprintf(buf, "100:2,1,*** Power alarm, running on UPS;"); return buf; } if (s_bbsopen == FALSE) { sprintf(buf, "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 (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)); goto ack; } else if (strncasecmp(msg, "/echo", 5) == 0) { sprintf(buf, "%s", msg); system_msg(chat_users[i].pid, buf); goto ack; } else if ((strncasecmp(msg, "/exit", 5) == 0) || (strncasecmp(msg, "/quit", 5) == 0) || (strncasecmp(msg, "/bye", 4) == 0)) { part(chat_users[i].pid, (char *)"Quitting"); sprintf(buf, "Goodbye"); system_msg(chat_users[i].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)) { sprintf(buf, "** Try /join #channel"); system_msg(chat_users[i].pid, buf); } else if (chat_users[i].channel != -1) { sprintf(buf, "** Cannot join while in a channel"); system_msg(chat_users[i].pid, buf); } else { Syslog('-', "Trying to join channel %s", cmd); join(chat_users[i].pid, cmd+1, chat_users[i].sysop); } chat_dump(); goto ack; } 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; } 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"); } 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) { 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"); system_msg(chat_users[i].pid, buf); } 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; } 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); goto ack; } } if (chat_users[i].channel == -1) { /* * Trying messages while not in a channel */ sprintf(buf, "** No channel joined. Try /join #channel"); system_msg(chat_users[i].pid, buf); chat_dump(); goto ack; } else { chat_msg(chat_users[i].channel, chat_users[i].name, msg); chat_dump(); } goto ack; } } Syslog('-', "Pid %s was not connected to chatserver"); sprintf(buf, "100:2,1,*** ERROR - Not connected to server;"); return buf; ack: sprintf(buf, "100:0;"); return buf; hangup: sprintf(buf, "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; int i; if (IsSema((char *)"upsalarm")) { 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;"); return buf; } memset(&buf, 0, sizeof(buf)); pid = strtok(data, ","); pid = strtok(NULL, ";"); for (i = 0; i < MAXCLIENT; i++) { if (atoi(pid) == chat_users[i].pid) { /* * 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)) { // } 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. */ sprintf(buf, "100:2,0,%s;", chat_messages[chat_users[i].pointer].message); Syslog('-', "%s", buf); return buf; } } sprintf(buf, "100:0;"); return buf; } } sprintf(buf, "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; 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;"); return buf; }