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deb-mbse/mbtask/taskibc.c

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/*****************************************************************************
*
* $Id$
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* Purpose ...............: mbtask - Internet BBS Chat (but it looks like...)
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*
*****************************************************************************
* 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"
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#include "taskstat.h"
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#include "taskutil.h"
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#include "taskchat.h"
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#include "taskibc.h"
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int ibc_run = FALSE; /* Thread running */
extern int T_Shutdown; /* Program shutdown */
extern int internet; /* Internet status */
time_t scfg_time = (time_t)0; /* Servers config time */
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time_t now; /* Current time */
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ncs_list *ncsl = NULL; /* Neighbours list */
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srv_list *servers = NULL; /* Active servers */
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usr_list *users = NULL; /* Active users */
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chn_list *channels = NULL; /* Active channels */
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ban_list *banned = NULL; /* Banned users */
nick_list *nicknames = NULL; /* Known nicknames */
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int ls; /* Listen socket */
struct sockaddr_in myaddr_in; /* Listen socket address */
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struct sockaddr_in clientaddr_in; /* Remote socket address */
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char crbuf[512]; /* Chat receive buffer */
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int callchg = FALSE; /* Is call state changed */
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int srvchg = FALSE; /* Is serverlist changed */
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int usrchg = FALSE; /* Is userlist changed */
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int chnchg = FALSE; /* Is channellist changed */
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int banchg = FALSE; /* Is banned users changed */
int nickchg = FALSE; /* Is nicknames changed */
time_t resettime; /* Time to reset all */
int do_reset = FALSE; /* Reset init */
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#define PING_PONG_LOG 1
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pthread_mutex_t b_mutex = PTHREAD_MUTEX_INITIALIZER;
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typedef enum {NCS_INIT, NCS_CALL, NCS_WAITPWD, NCS_CONNECT, NCS_HANGUP, NCS_FAIL, NCS_DEAD} NCSTYPE;
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static char *ncsstate[] = {
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(char *)"init", (char *)"call", (char *)"waitpwd", (char *)"connect",
(char *)"hangup", (char *)"fail", (char *)"dead"
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};
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/*
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* Internal prototypes
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*/
void fill_ncslist(ncs_list **, char *, char *, char *, int, unsigned int);
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void dump_ncslist(void);
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void tidy_servers(srv_list **);
int add_server(srv_list **, char *, int, char *, char *, char *, char *);
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void del_server(srv_list **, char *);
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void del_router(srv_list **, char *);
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int send_msg(ncs_list *, const char *, ...);
void broadcast(char *, const char *, ...);
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void check_servers(void);
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int command_pass(char *, char *);
int command_server(char *, char *);
int command_squit(char *, char *);
int command_user(char *, char *);
int command_quit(char *, char *);
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int command_nick(char *, char *);
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int command_join(char *, char *);
int command_part(char *, char *);
int command_topic(char *, char *);
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int command_privmsg(char *, char *);
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void receiver(struct servent *);
/*
* Add a server to the serverlist
*/
void fill_ncslist(ncs_list **fdp, char *server, char *myname, char *passwd, int dyndns, unsigned int crc)
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{
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ncs_list *tmp, *ta;
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pthread_mutex_lock(&b_mutex);
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tmp = (ncs_list *)malloc(sizeof(ncs_list));
memset(tmp, 0, sizeof(tmp));
tmp->next = NULL;
strncpy(tmp->server, server, 63);
strncpy(tmp->resolved, server, 63);
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strncpy(tmp->myname, myname, 63);
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strncpy(tmp->passwd, passwd, 15);
tmp->state = NCS_INIT;
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tmp->action = now;
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tmp->last = (time_t)0;
tmp->version = 0;
tmp->remove = FALSE;
tmp->socket = -1;
tmp->token = 0;
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tmp->gotpass = FALSE;
tmp->gotserver = FALSE;
tmp->dyndns = dyndns;
tmp->halfdead = 0;
tmp->crc = crc;
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if (*fdp == NULL) {
*fdp = tmp;
} else {
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for (ta = *fdp; ta; ta = ta->next) {
if (ta->next == NULL) {
ta->next = (ncs_list *)tmp;
break;
}
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}
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}
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pthread_mutex_unlock(&b_mutex);
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}
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void dump_ncslist(void)
{
ncs_list *tmp;
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srv_list *srv;
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usr_list *usrp;
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chn_list *chnp;
char temp1[128], temp2[128];
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if (!callchg && !srvchg && !usrchg && !chnchg && !banchg && !nickchg)
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return;
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if (callchg) {
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if (ncsl) {
Syslog('r', "IBC: Server State Del Pwd Srv Dyn 1/2 Next action");
Syslog('r', "IBC: ------------------------------ ------- --- --- --- --- --- -----------");
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for (tmp = ncsl; tmp; tmp = tmp->next) {
snprintf(temp1, 30, "%s", tmp->server);
Syslog('r', "IBC: %-30s %-7s %s %s %s %s %3d %d", temp1, ncsstate[tmp->state],
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tmp->remove ? "yes":"no ", tmp->gotpass ? "yes":"no ",
tmp->gotserver ? "yes":"no ", tmp->dyndns ? "yes":"no ",
tmp->halfdead, (int)tmp->action - (int)now);
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}
} else {
Syslog('r', "IBC: No servers configured");
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}
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}
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if (srvchg) {
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if (servers) {
Syslog('+', "IBC: Server Router Hops Users Connect time");
Syslog('+', "IBC: ------------------------- ------------------------- ----- ----- --------------------");
for (srv = servers; srv; srv = srv->next) {
snprintf(temp1, 25, "%s", srv->server);
snprintf(temp2, 25, "%s", srv->router);
Syslog('+', "IBC: %-25s %-25s %5d %5d %s", temp1, temp2, srv->hops, srv->users, rfcdate(srv->connected));
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}
} else {
Syslog('+', "IBC: Servers list is empty");
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}
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}
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if (usrchg) {
if (users) {
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Syslog('+', "IBC: Server User Name/Nick Channel Sys Connect time");
Syslog('+', "IBC: -------------------- -------------------- --------- ------------- --- --------------------");
for (usrp = users; usrp; usrp = usrp->next) {
snprintf(temp1, 20, "%s", usrp->server);
snprintf(temp2, 20, "%s", usrp->realname);
Syslog('+', "IBC: %-20s %-20s %-9s %-13s %s %s", temp1, temp2, usrp->nick, usrp->channel,
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usrp->sysop ? "yes":"no ", rfcdate(usrp->connected));
}
} else {
Syslog('+', "IBC: Users list is empty");
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}
}
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if (chnchg) {
if (channels) {
Syslog('+', "IBC: Channel Owner Topic Usr Created");
Syslog('+', "IBC: -------------------- --------- ----------------------------------- --- --------------------");
for (chnp = channels; chnp; chnp = chnp->next) {
Syslog('+', "IBC: %-20s %-9s %-35s %3d %s", chnp->name, chnp->owner, chnp->topic,
chnp->users, rfcdate(chnp->created));
}
} else {
Syslog('+', "IBC: Channels list is empty");
}
}
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callchg = FALSE;
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srvchg = FALSE;
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usrchg = FALSE;
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chnchg = FALSE;
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banchg = FALSE;
nickchg = FALSE;
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}
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void tidy_servers(srv_list ** fdp)
{
srv_list *tmp, *old;
for (tmp = *fdp; tmp; tmp = old) {
old = tmp->next;
free(tmp);
}
*fdp = NULL;
}
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/*
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* Add one user to the userlist. Returns:
* 0 = Ok
* 1 = User already registered.
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*/
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int add_user(usr_list **fap, char *server, char *name, char *realname)
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{
usr_list *tmp, *ta;
srv_list *sl;
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Syslog('r', "add_user %s %s %s", server, name, realname);
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for (ta = *fap; ta; ta = ta->next) {
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if ((strcmp(ta->server, server) == 0) && (strcmp(ta->realname, realname) == 0)) {
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Syslog('-', "IBC: add_user(%s %s %s), already registered", server, name, realname);
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return 1;
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}
}
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pthread_mutex_lock(&b_mutex);
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tmp = (usr_list *)malloc(sizeof(usr_list));
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memset(tmp, 0, sizeof(usr_list));
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tmp->next = NULL;
strncpy(tmp->server, server, 63);
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strncpy(tmp->name, name, 9);
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strncpy(tmp->nick, name, 9);
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strncpy(tmp->realname, realname, 36);
tmp->connected = now;
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if (*fap == NULL) {
*fap = tmp;
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} else {
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for (ta = *fap; ta; ta = ta->next) {
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if (ta->next == NULL) {
ta->next = (usr_list *)tmp;
break;
}
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}
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}
for (sl = servers; sl; sl = sl->next) {
if (strcmp(sl->server, server) == 0) {
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sl->users++;
srvchg = TRUE;
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}
}
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pthread_mutex_unlock(&b_mutex);
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usrchg = TRUE;
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return 0;
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}
/*
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* Delete one user. If name == NULL then delete all users of a server.
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*/
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void del_user(usr_list **fap, char *server, char *name)
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{
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usr_list **tmp, *tmpa;
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srv_list *sl;
Syslog('r', "IBC: deluser %s %s", server, printable(name, 0));
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if (*fap == NULL)
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return;
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if (name)
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pthread_mutex_lock(&b_mutex);
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tmp = fap;
while (*tmp) {
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if (name && (strcmp((*tmp)->server, server) == 0) && (strcmp((*tmp)->name, name) == 0)) {
tmpa = *tmp;
*tmp=(*tmp)->next;
free(tmpa);
usrchg = TRUE;
} else if ((name == NULL) && (strcmp((*tmp)->server, server) == 0)) {
Syslog('r', "IBC: removed user %s from %s", (*tmp)->name, (*tmp)->server);
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tmpa = *tmp;
*tmp=(*tmp)->next;
free(tmpa);
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usrchg = TRUE;
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} else {
tmp = &((*tmp)->next);
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}
}
for (sl = servers; sl; sl = sl->next) {
if ((strcmp(sl->server, server) == 0) && sl->users) {
sl->users--;
srvchg = TRUE;
}
}
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if (name)
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pthread_mutex_unlock(&b_mutex);
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}
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/*
* Add channel with owner.
*/
int add_channel(chn_list **fap, char *name, char *owner, char *server)
{
chn_list *tmp, *ta;
Syslog('r', "IBC: add_channel %s %s %s", name, owner, server);
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for (ta = *fap; ta; ta = ta->next) {
if ((strcmp(ta->name, name) == 0) && (strcmp(ta->owner, owner) == 0) && (strcmp(ta->server, server) == 0)) {
Syslog('-', "IBC: add_channel(%s %s %s), already registered", name, owner, server);
return 1;
}
}
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pthread_mutex_lock(&b_mutex);
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tmp = (chn_list *)malloc(sizeof(chn_list));
memset(tmp, 0, sizeof(chn_list));
tmp->next = NULL;
strncpy(tmp->name, name, 20);
strncpy(tmp->owner, owner, 9);
strncpy(tmp->server, server, 63);
tmp->users = 1;
tmp->created = now;
if (*fap == NULL) {
*fap = tmp;
} else {
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for (ta = *fap; ta; ta = ta->next) {
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if (ta->next == NULL) {
ta->next = (chn_list *)tmp;
break;
}
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}
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}
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pthread_mutex_unlock(&b_mutex);
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chnchg = TRUE;
return 0;
}
void del_channel(chn_list **fap, char *name)
{
chn_list **tmp, *tmpa;
Syslog('r', "IBC: del_channel %s", name);
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if (*fap == NULL)
return;
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pthread_mutex_lock(&b_mutex);
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tmp = fap;
while (*tmp) {
if (strcmp((*tmp)->name, name) == 0) {
tmpa = *tmp;
*tmp=(*tmp)->next;
free(tmpa);
chnchg = TRUE;
} else {
tmp = &((*tmp)->next);
}
}
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pthread_mutex_unlock(&b_mutex);
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}
int add_server(srv_list **fdp, char *name, int hops, char *prod, char *vers, char *fullname, char *router)
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{
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srv_list *tmp, *ta;
int haverouter = FALSE;
Syslog('r', "IBC: add_server %s %d %s %s \"%s\" %s", name, hops, prod, vers, fullname, router);
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for (ta = *fdp; ta; ta = ta->next) {
if (strcmp(ta->server, name) == 0) {
Syslog('r', "IBC: duplicate, ignore");
return 0;
}
}
/*
* If name <> router it's a remote server, then check if we have a router in our list.
*/
if (strcmp(name, router) && hops) {
for (ta = *fdp; ta; ta = ta->next) {
if (strcmp(ta->server, router) == 0) {
haverouter = TRUE;
break;
}
}
if (! haverouter) {
Syslog('-', "IBC: no router for server %s, ignore", name);
return 0;
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}
}
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pthread_mutex_lock(&b_mutex);
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tmp = (srv_list *)malloc(sizeof(srv_list));
memset(tmp, 0, sizeof(tmp));
tmp->next = NULL;
strncpy(tmp->server, name, 63);
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strncpy(tmp->router, router, 63);
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strncpy(tmp->prod, prod, 20);
strncpy(tmp->vers, vers, 20);
strncpy(tmp->fullname, fullname, 35);
tmp->connected = now;
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tmp->users = 0;
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tmp->hops = hops;
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if (*fdp == NULL) {
*fdp = tmp;
} else {
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for (ta = *fdp; ta; ta = ta->next) {
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if (ta->next == NULL) {
ta->next = (srv_list *)tmp;
break;
}
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}
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}
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pthread_mutex_unlock(&b_mutex);
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srvchg = TRUE;
return 1;
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}
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/*
* Delete server.
*/
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void del_server(srv_list **fap, char *name)
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{
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srv_list *ta, *tan;
Syslog('r', "IBC: delserver %s", name);
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if (*fap == NULL)
return;
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pthread_mutex_lock(&b_mutex);
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for (ta = *fap; ta; ta = ta->next) {
while ((tan = ta->next) && (strcmp(tan->server, name) == 0)) {
ta->next = tan->next;
free(tan);
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srvchg = TRUE;
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}
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ta->next = tan;
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}
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pthread_mutex_unlock(&b_mutex);
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}
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/*
* Delete router.
*/
void del_router(srv_list **fap, char *name)
{
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srv_list *ta, *tan;
Syslog('r', "IBC: delrouter %s", name);
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if (*fap == NULL)
return;
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pthread_mutex_lock(&b_mutex);
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for (ta = *fap; ta; ta = ta->next) {
while ((tan = ta->next) && (strcmp(tan->router, name) == 0)) {
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del_user(&users, tan->server, NULL);
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ta->next = tan->next;
free(tan);
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srvchg = TRUE;
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}
ta->next = tan;
}
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pthread_mutex_unlock(&b_mutex);
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}
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/*
* Send a message to all servers
*/
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void send_all(const char *format, ...)
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{
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ncs_list *tnsl;
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char buf[512];
va_list va_ptr;
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va_start(va_ptr, format);
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vsnprintf(buf, 512, format, va_ptr);
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va_end(va_ptr);
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for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if (tnsl->state == NCS_CONNECT) {
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send_msg(tnsl, buf);
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}
}
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}
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/*
* Broadcast a message to all servers except the originating server
*/
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void broadcast(char *origin, const char *format, ...)
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{
ncs_list *tnsl;
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va_list va_ptr;
char buf[512];
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va_start(va_ptr, format);
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vsnprintf(buf, 512, format, va_ptr);
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va_end(va_ptr);
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for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if ((tnsl->state == NCS_CONNECT) && (strcmp(origin, tnsl->server))) {
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send_msg(tnsl, buf);
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}
}
}
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/*
* Send message to a server
*/
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int send_msg(ncs_list *tnsl, const char *format, ...)
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{
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char buf[512];
va_list va_ptr;
va_start(va_ptr, format);
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vsnprintf(buf, 512, format, va_ptr);
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va_end(va_ptr);
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#ifndef PING_PONG_LOG
if (strcmp(buf, "PING\r\n") && strcmp(buf, "PONG\r\n"))
#endif
Syslog('r', "IBC: > %s: %s", tnsl->server, printable(buf, 0));
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if (sendto(tnsl->socket, buf, strlen(buf), 0, (struct sockaddr *)&tnsl->servaddr_in, sizeof(struct sockaddr_in)) == -1) {
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Syslog('!', "$IBC: can't send message");
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return -1;
}
return 0;
}
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void check_servers(void)
{
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char *errmsg, scfgfn[PATH_MAX];
FILE *fp;
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ncs_list *tnsl, **tmp;
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srv_list *srv;
int j, inlist, Remove, local_reset;
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int a1, a2, a3, a4;
unsigned int crc;
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struct servent *se;
struct hostent *he;
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snprintf(scfgfn, PATH_MAX, "%s/etc/ibcsrv.data", getenv("MBSE_ROOT"));
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/*
* Check if we reached the global reset time
*/
if (((int)time(NULL) > (int)resettime) && !do_reset) {
resettime = time(NULL) + (time_t)86400;
do_reset = TRUE;
Syslog('+', "IBC: global reset time reached, preparing reset");
}
local_reset = FALSE;
if ((users == NULL) && (channels == NULL) && do_reset) {
Syslog('+', "IBC: no channels and users, performing reset");
local_reset = TRUE;
do_reset = FALSE;
}
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/*
* Check if configuration is changed, if so then apply the changes.
*/
if ((file_time(scfgfn) != scfg_time) || local_reset) {
if (! local_reset)
Syslog('r', "IBC: %s filetime changed, rereading", scfgfn);
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if (servers == NULL) {
/*
* First add this server name to the servers database.
*/
add_server(&servers, CFG.myfqdn, 0, (char *)"mbsebbs", (char *)VERSION, CFG.bbs_name, (char *)"none");
}
/*
* Local reset, make all crc's invalid so the connections will restart.
*/
pthread_mutex_lock(&b_mutex);
if (local_reset)
for (tnsl = ncsl; tnsl; tnsl = tnsl->next)
tnsl->crc--;
pthread_mutex_unlock(&b_mutex);
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if ((fp = fopen(scfgfn, "r"))) {
fread(&ibcsrvhdr, sizeof(ibcsrvhdr), 1, fp);
/*
* Check for neighbour servers to delete
*/
for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
fseek(fp, ibcsrvhdr.hdrsize, SEEK_SET);
inlist = FALSE;
while (fread(&ibcsrv, ibcsrvhdr.recsize, 1, fp)) {
crc = 0xffffffff;
crc = upd_crc32((char *)&ibcsrv, crc, sizeof(ibcsrv));
if ((strcmp(tnsl->server, ibcsrv.server) == 0) && ibcsrv.Active && (tnsl->crc == crc)) {
inlist = TRUE;
}
}
if (!inlist) {
if (local_reset)
Syslog('+', "IBC: server %s connection reset", tnsl->server);
else
Syslog('+', "IBC: server %s configuration changed or removed", tnsl->server);
pthread_mutex_lock(&b_mutex);
tnsl->remove = TRUE;
tnsl->action = now;
pthread_mutex_unlock(&b_mutex);
srvchg = TRUE;
callchg = TRUE;
}
}
/*
* Start removing servers
*/
Remove = FALSE;
for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if (tnsl->remove) {
Remove = TRUE;
Syslog('r', "IBC: Remove server %s", tnsl->server);
if (tnsl->state == NCS_CONNECT) {
if (local_reset) {
broadcast(tnsl->server, "SQUIT %s Reset connection\r\n", tnsl->server);
send_msg(tnsl, "SQUIT %s Your system connection is reset\r\n", tnsl->myname);
} else {
broadcast(tnsl->server, "SQUIT %s Removed from configuration\r\n", tnsl->server);
send_msg(tnsl, "SQUIT %s Your system is removed from configuration\r\n", tnsl->myname);
}
del_router(&servers, tnsl->server);
}
if (tnsl->socket != -1) {
Syslog('r', "IBC: Closing socket %d", tnsl->socket);
shutdown(tnsl->socket, SHUT_WR);
tnsl->socket = -1;
tnsl->state = NCS_HANGUP;
}
callchg = TRUE;
srvchg = TRUE;
}
}
dump_ncslist();
/*
* If a neighbour is removed by configuration, remove it from the list.
*/
if (Remove) {
Syslog('r', "IBC: Starting remove list");
pthread_mutex_lock(&b_mutex);
tmp = &ncsl;
while (*tmp) {
if ((*tmp)->remove) {
Syslog('r', "do %s", (*tmp)->server);
tnsl = *tmp;
*tmp = (*tmp)->next;
free(tnsl);
callchg = TRUE;
} else {
tmp = &((*tmp)->next);
}
}
pthread_mutex_unlock(&b_mutex);
}
dump_ncslist();
/*
* Changed or deleted servers are now removed, add new
* configured servers or changed servers.
*/
fseek(fp, ibcsrvhdr.hdrsize, SEEK_SET);
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while (fread(&ibcsrv, ibcsrvhdr.recsize, 1, fp)) {
/*
* Check for new configured servers
*/
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if (ibcsrv.Active) {
inlist = FALSE;
for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if (strcmp(tnsl->server, ibcsrv.server) == 0) {
inlist = TRUE;
}
}
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for (srv = servers; srv; srv = srv->next) {
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if ((strcmp(srv->server, ibcsrv.server) == 0) && (strcmp(srv->router, ibcsrv.server))) {
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inlist = TRUE;
Syslog('+', "IBC: can't add new configured server %s: already connected via %s",
ibcsrv.server, srv->router);
}
}
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if (!inlist ) {
crc = 0xffffffff;
crc = upd_crc32((char *)&ibcsrv, crc, sizeof(ibcsrv));
fill_ncslist(&ncsl, ibcsrv.server, ibcsrv.myname, ibcsrv.passwd, ibcsrv.Dyndns, crc);
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srvchg = TRUE;
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callchg = TRUE;
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Syslog('+', "IBC: new configured Internet BBS Chatserver: %s", ibcsrv.server);
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}
}
}
fclose(fp);
}
scfg_time = file_time(scfgfn);
}
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dump_ncslist();
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/*
* Check if we need to make state changes
*/
for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if (((int)tnsl->action - (int)now) <= 0) {
switch (tnsl->state) {
case NCS_INIT: Syslog('r', "IBC: %s init", tnsl->server);
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/*
* If Internet is available, setup the connection.
*/
if (internet) {
/*
* Get IP address for the hostname, set default next action
* to 60 seconds.
*/
tnsl->action = now + (time_t)60;
memset(&tnsl->servaddr_in, 0, sizeof(struct sockaddr_in));
se = getservbyname("fido", "udp");
tnsl->servaddr_in.sin_family = AF_INET;
tnsl->servaddr_in.sin_port = se->s_port;
if (sscanf(tnsl->server,"%d.%d.%d.%d",&a1,&a2,&a3,&a4) == 4)
tnsl->servaddr_in.sin_addr.s_addr = inet_addr(tnsl->server);
else if ((he = gethostbyname(tnsl->server)))
memcpy(&tnsl->servaddr_in.sin_addr, he->h_addr, he->h_length);
else {
switch (h_errno) {
case HOST_NOT_FOUND: errmsg = (char *)"Authoritative: Host not found"; break;
case TRY_AGAIN: errmsg = (char *)"Non-Authoritive: Host not found"; break;
case NO_RECOVERY: errmsg = (char *)"Non recoverable errors"; break;
default: errmsg = (char *)"Unknown error"; break;
}
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Syslog('!', "IBC: no IP address for %s: %s", tnsl->server, errmsg);
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tnsl->action = now + (time_t)120;
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tnsl->state = NCS_FAIL;
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callchg = TRUE;
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break;
}
if (tnsl->socket == -1) {
tnsl->socket = socket(AF_INET, SOCK_DGRAM, 0);
if (tnsl->socket == -1) {
Syslog('!', "$IBC: can't create socket for %s", tnsl->server);
tnsl->state = NCS_FAIL;
tnsl->action = now + (time_t)120;
callchg = TRUE;
break;
}
Syslog('r', "IBC: socket created");
} else {
Syslog('r', "IBC: socket reused");
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}
Syslog('r', "IBC: socket %d", tnsl->socket);
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tnsl->state = NCS_CALL;
tnsl->action = now + (time_t)1;
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callchg = TRUE;
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} else {
tnsl->action = now + (time_t)10;
}
break;
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case NCS_CALL: /*
* In this state we accept PASS and SERVER commands from
* the remote with the same token as we have sent.
*/
Syslog('r', "IBC: %s call", tnsl->server);
if (strlen(tnsl->passwd) == 0) {
Syslog('!', "IBC: no password configured for %s", tnsl->server);
tnsl->state = NCS_FAIL;
tnsl->action = now + (time_t)300;
callchg = TRUE;
break;
}
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tnsl->token = gettoken();
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send_msg(tnsl, "PASS %s 0100 %s\r\n", tnsl->passwd, tnsl->compress ? "Z":"");
send_msg(tnsl, "SERVER %s 0 %ld mbsebbs %s %s\r\n", tnsl->myname, tnsl->token,
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VERSION, CFG.bbs_name);
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tnsl->action = now + (time_t)10;
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tnsl->state = NCS_WAITPWD;
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callchg = TRUE;
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break;
case NCS_WAITPWD: /*
* This state can be left by before the timeout is reached
* by a reply from the remote if the connection is accepted.
*/
Syslog('r', "IBC: %s waitpwd", tnsl->server);
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tnsl->token = 0;
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tnsl->state = NCS_CALL;
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while (TRUE) {
j = 1+(int) (1.0 * CFG.dialdelay * rand() / (RAND_MAX + 1.0));
if ((j > (CFG.dialdelay / 10)) && (j > 9))
break;
}
Syslog('r', "IBC: next call in %d %d seconds", CFG.dialdelay, j);
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tnsl->action = now + (time_t)j;
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callchg = TRUE;
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break;
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case NCS_CONNECT: /*
* In this state we check if the connection is still alive
*/
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j = (int)now - (int)tnsl->last;
if (tnsl->halfdead > 5) {
/*
* Halfdead means 5 times received a PASS while we are in
* connected state. This means the other side "thinks" it's
* not connected and tries to connect. This can be caused by
* temporary internet problems.
* Reset our side of the connection.
*/
Syslog('+', "IBC: server %s connection is half dead", tnsl->server);
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pthread_mutex_lock(&b_mutex);
tnsl->state = NCS_DEAD;
tnsl->action = now + (time_t)60; // 1 minute delay before calling again.
tnsl->gotpass = FALSE;
tnsl->gotserver = FALSE;
tnsl->token = 0;
tnsl->halfdead = 0;
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pthread_mutex_unlock(&b_mutex);
broadcast(tnsl->server, "SQUIT %s Connection died\r\n", tnsl->server);
callchg = TRUE;
srvchg = TRUE;
system_shout("*** NETWORK SPLIT, lost connection with server %s", tnsl->server);
del_router(&servers, tnsl->server);
break;
}
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if (((int)now - (int)tnsl->last) > 130) {
/*
* Missed 3 PING replies
*/
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Syslog('+', "IBC: server %s connection is dead", tnsl->server);
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pthread_mutex_lock(&b_mutex);
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tnsl->state = NCS_DEAD;
tnsl->action = now + (time_t)120; // 2 minutes delay before calling again.
tnsl->gotpass = FALSE;
tnsl->gotserver = FALSE;
tnsl->token = 0;
tnsl->halfdead = 0;
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pthread_mutex_unlock(&b_mutex);
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broadcast(tnsl->server, "SQUIT %s Connection died\r\n", tnsl->server);
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callchg = TRUE;
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srvchg = TRUE;
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system_shout("*** NETWORK SPLIT, lost connection with server %s", tnsl->server);
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del_router(&servers, tnsl->server);
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break;
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}
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/*
* Ping at 60, 90 and 120 seconds
*/
if (((int)now - (int)tnsl->last) > 120) {
Syslog('r', "IBC: sending 3rd PING at 120 seconds");
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send_msg(tnsl, "PING\r\n");
} else if (((int)now - (int)tnsl->last) > 90) {
Syslog('r', "IBC: sending 2nd PING at 90 seconds");
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send_msg(tnsl, "PING\r\n");
} else if (((int)now - (int)tnsl->last) > 60) {
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send_msg(tnsl, "PING\r\n");
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}
tnsl->action = now + (time_t)10;
break;
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case NCS_HANGUP: Syslog('r', "IBC: %s hangup => call", tnsl->server);
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tnsl->action = now + (time_t)1;
tnsl->state = NCS_CALL;
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callchg = TRUE;
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srvchg = TRUE;
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break;
case NCS_DEAD: Syslog('r', "IBC: %s dead -> call", tnsl->server);
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tnsl->action = now + (time_t)1;
tnsl->state = NCS_CALL;
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callchg = TRUE;
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srvchg = TRUE;
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break;
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case NCS_FAIL: Syslog('r', "IBC: %s fail => init", tnsl->server);
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tnsl->action = now + (time_t)1;
tnsl->state = NCS_INIT;
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callchg = TRUE;
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srvchg = TRUE;
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break;
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}
}
}
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dump_ncslist();
}
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int command_pass(char *hostname, char *parameters)
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{
ncs_list *tnsl;
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char *passwd, *version, *lnk;
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for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if (strcmp(tnsl->server, hostname) == 0) {
break;
}
}
tnsl->gotpass = FALSE;
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passwd = strtok(parameters, " \0");
version = strtok(NULL, " \0");
lnk = strtok(NULL, " \0");
if (strcmp(passwd, "0100") == 0) {
send_msg(tnsl, "414 PASS: Got empty password\r\n");
return 414;
}
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if (version == NULL) {
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send_msg(tnsl, "400 PASS: Not enough parameters\r\n");
return 400;
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}
if (strcmp(passwd, tnsl->passwd)) {
Syslog('!', "IBC: got bad password %s from %s", passwd, hostname);
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return 0;
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}
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if (tnsl->state == NCS_CONNECT) {
send_msg(tnsl, "401: PASS: Already registered\r\n");
tnsl->halfdead++; /* Count them */
srvchg = TRUE;
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return 401;
}
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tnsl->gotpass = TRUE;
tnsl->version = atoi(version);
if (lnk && strchr(lnk, 'Z'))
tnsl->compress = TRUE;
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return 0;
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}
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int command_server(char *hostname, char *parameters)
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{
ncs_list *tnsl;
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srv_list *ta;
usr_list *tmp;
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chn_list *tmpc;
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char *name, *hops, *id, *prod, *vers, *fullname;
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unsigned int token;
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int ihops, found = FALSE;
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name = strtok(parameters, " \0");
hops = strtok(NULL, " \0");
id = strtok(NULL, " \0");
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prod = strtok(NULL, " \0");
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vers = strtok(NULL, " \0");
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fullname = strtok(NULL, "\0");
ihops = atoi(hops) + 1;
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for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if (strcmp(tnsl->server, name) == 0) {
found = TRUE;
break;
}
}
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if (fullname == NULL) {
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send_msg(tnsl, "400 SERVER: Not enough parameters\r\n");
return 400;
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}
token = atoi(id);
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if (found && tnsl->token) {
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/*
* We are in calling state, so we expect the token from the
* remote is the same as the token we sent.
* In that case, the session is authorized.
*/
if (tnsl->token == token) {
2005-04-21 21:12:50 +00:00
broadcast(tnsl->server, "SERVER %s %d %s %s %s %s\r\n", name, ihops, id, prod, vers, fullname);
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system_shout("* New server: %s, %s", name, fullname);
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pthread_mutex_lock(&b_mutex);
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tnsl->gotserver = TRUE;
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callchg = TRUE;
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srvchg = TRUE;
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tnsl->state = NCS_CONNECT;
tnsl->action = now + (time_t)10;
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pthread_mutex_unlock(&b_mutex);
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Syslog('+', "IBC: connected with neighbour server: %s", tnsl->server);
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/*
* Send all already known servers
*/
for (ta = servers; ta; ta = ta->next) {
if (ta->hops) {
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send_msg(tnsl, "SERVER %s %d 0 %s %s %s\r\n", ta->server, ta->hops, ta->prod, ta->vers, ta->fullname);
2005-04-18 18:22:09 +00:00
}
}
/*
* Send all known users
*/
for (tmp = users; tmp; tmp = tmp->next) {
send_msg(tnsl, "USER %s@%s %s\r\n", tmp->name, tmp->server, tmp->realname);
if (strcmp(tmp->name, tmp->nick))
send_msg(tnsl, "NICK %s %s %s %s\r\n", tmp->nick, tmp->name, tmp->server, tmp->realname);
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if (strlen(tmp->channel)) {
for (tmpc = channels; tmpc; tmpc = tmpc->next) {
if (strcasecmp(tmpc->name, tmp->channel) == 0) {
send_msg(tnsl, "JOIN %s@%s %s\r\n", tmpc->owner, tmpc->server, tmpc->name);
if (strlen(tmpc->topic) && (strcmp(tmpc->server, CFG.myfqdn) == 0)) {
send_msg(tnsl, "TOPIC %s %s\r\n", tmpc->name, tmpc->topic);
}
}
}
}
}
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add_server(&servers, tnsl->server, ihops, prod, vers, fullname, hostname);
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return 0;
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}
2005-04-30 11:41:24 +00:00
Syslog('r', "IBC: call collision with %s", tnsl->server);
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tnsl->state = NCS_WAITPWD; /* Experimental, should fix state when state was connect while it wasn't. */
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return 0;
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}
/*
* We are in waiting state, so we sent our PASS and SERVER
* messages and set the session to connected if we got a
* valid PASS command.
*/
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if (found && tnsl->gotpass) {
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send_msg(tnsl, "PASS %s 0100 %s\r\n", tnsl->passwd, tnsl->compress ? "Z":"");
send_msg(tnsl, "SERVER %s 0 %ld mbsebbs %s %s\r\n", tnsl->myname, token, VERSION, CFG.bbs_name);
broadcast(tnsl->server, "SERVER %s %d %s %s %s %s\r\n", name, ihops, id, prod, vers, fullname);
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system_shout("* New server: %s, %s", name, fullname);
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pthread_mutex_lock(&b_mutex);
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tnsl->gotserver = TRUE;
tnsl->state = NCS_CONNECT;
tnsl->action = now + (time_t)10;
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pthread_mutex_unlock(&b_mutex);
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Syslog('+', "IBC: connected with neighbour server: %s", tnsl->server);
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/*
* Send all already known servers
*/
for (ta = servers; ta; ta = ta->next) {
if (ta->hops) {
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send_msg(tnsl, "SERVER %s %d 0 %s %s %s\r\n", ta->server, ta->hops, ta->prod, ta->vers, ta->fullname);
2005-04-18 18:22:09 +00:00
}
}
/*
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* Send all known users. If a user is in a channel, send a JOIN.
* If the user is one of our own and has set a channel topic, send it.
*/
for (tmp = users; tmp; tmp = tmp->next) {
send_msg(tnsl, "USER %s@%s %s\r\n", tmp->name, tmp->server, tmp->realname);
if (strcmp(tmp->name, tmp->nick))
send_msg(tnsl, "NICK %s %s %s %s\r\n", tmp->nick, tmp->name, tmp->server, tmp->realname);
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if (strlen(tmp->channel)) {
for (tmpc = channels; tmpc; tmpc = tmpc->next) {
if (strcasecmp(tmpc->name, tmp->channel) == 0) {
send_msg(tnsl, "JOIN %s@%s %s\r\n", tmpc->owner, tmpc->server, tmpc->name);
if (strlen(tmpc->topic) && (strcmp(tmpc->server, CFG.myfqdn) == 0)) {
send_msg(tnsl, "TOPIC %s %s\r\n", tmpc->name, tmpc->topic);
}
}
}
}
}
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add_server(&servers, tnsl->server, ihops, prod, vers, fullname, hostname);
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srvchg = TRUE;
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callchg = TRUE;
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return 0;
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}
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if (! found) {
/*
* Got a message about a server that is not our neighbour, could be a relayed server.
2005-04-18 18:08:07 +00:00
*/
if (add_server(&servers, name, ihops, prod, vers, fullname, hostname)) {
broadcast(hostname, "SERVER %s %d %s %s %s %s\r\n", name, ihops, id, prod, vers, fullname);
srvchg = TRUE;
Syslog('+', "IBC: new relay server %s: %s", name, fullname);
system_shout("* New server: %s, %s", name, fullname);
}
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return 0;
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}
Syslog('r', "IBC: got SERVER command without PASS command from %s", hostname);
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return 0;
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}
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int command_squit(char *hostname, char *parameters)
2005-04-18 11:38:44 +00:00
{
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ncs_list *tnsl;
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char *name, *message;
2005-04-18 15:19:38 +00:00
2005-04-18 11:38:44 +00:00
for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if (strcmp(tnsl->server, hostname) == 0) {
break;
}
}
name = strtok(parameters, " \0");
message = strtok(NULL, "\0");
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if (strcmp(name, tnsl->server) == 0) {
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Syslog('+', "IBC: disconnect neighbour server %s: %s", name, message);
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pthread_mutex_lock(&b_mutex);
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tnsl->state = NCS_HANGUP;
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tnsl->action = now + (time_t)120; // 2 minutes delay before calling again.
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tnsl->gotpass = FALSE;
tnsl->gotserver = FALSE;
tnsl->token = 0;
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pthread_mutex_unlock(&b_mutex);
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del_router(&servers, name);
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} else {
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Syslog('+', "IBC: disconnect relay server %s: %s", name, message);
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del_server(&servers, name);
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}
2005-04-18 16:48:51 +00:00
2005-04-23 11:25:32 +00:00
system_shout("* Server %s disconnected: %s", name, message);
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broadcast(hostname, "SQUIT %s %s\r\n", name, message);
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srvchg = TRUE;
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return 0;
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}
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int command_user(char *hostname, char *parameters)
2005-04-20 21:27:25 +00:00
{
ncs_list *tnsl;
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char *name, *server, *realname;
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for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if (strcmp(tnsl->server, hostname) == 0) {
break;
}
}
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name = strtok(parameters, "@\0");
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server = strtok(NULL, " \0");
realname = strtok(NULL, "\0");
if (realname == NULL) {
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send_msg(tnsl, "400 USER: Not enough parameters\r\n");
return 400;
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}
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if (add_user(&users, server, name, realname) == 0) {
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broadcast(hostname, "USER %s@%s %s\r\n", name, server, realname);
2005-04-23 11:25:32 +00:00
system_shout("* New user %s@%s (%s)", name, server, realname);
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}
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return 0;
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}
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int command_quit(char *hostname, char *parameters)
2005-04-20 21:27:25 +00:00
{
ncs_list *tnsl;
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char *name, *server, *message;
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for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if (strcmp(tnsl->server, hostname) == 0) {
break;
}
}
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name = strtok(parameters, "@\0");
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server = strtok(NULL, " \0");
message = strtok(NULL, "\0");
if (server == NULL) {
2005-05-01 20:46:30 +00:00
send_msg(tnsl, "400 QUIT: Not enough parameters\r\n");
return 400;
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}
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if (message) {
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system_shout("* User %s is leaving: %s", name, message);
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} else {
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system_shout("* User %s is leaving", name);
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}
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del_user(&users, server, name);
broadcast(hostname, "QUIT %s@%s %s\r\n", name, server, parameters);
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return 0;
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}
2005-04-22 19:40:05 +00:00
int command_nick(char *hostname, char *parameters)
{
ncs_list *tnsl;
usr_list *tmp;
char *nick, *name, *server, *realname;
int found;
for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if (strcmp(tnsl->server, hostname) == 0) {
break;
}
}
nick = strtok(parameters, " \0");
name = strtok(NULL, " \0");
server = strtok(NULL, " \0");
realname = strtok(NULL, "\0");
if (realname == NULL) {
2005-05-01 20:46:30 +00:00
send_msg(tnsl, "400 NICK: Not enough parameters\r\n");
2005-04-22 19:40:05 +00:00
return 1;
}
if (strlen(nick) > 9) {
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send_msg(tnsl, "402 %s: Erroneous nickname\r\n", nick);
return 402;
2005-04-22 19:40:05 +00:00
}
// FIXME: check 1st char is alpha, rest alpha/digit
found = FALSE;
for (tmp = users; tmp; tmp = tmp->next) {
2005-04-22 20:01:21 +00:00
if ((strcmp(tmp->name, nick) == 0) || (strcmp(tmp->nick, nick) == 0)) {
2005-04-22 19:40:05 +00:00
found = TRUE;
break;
}
}
if (found) {
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send_msg(tnsl, "403 %s: Nickname is already in use\r\n", nick);
return 403;
2005-04-22 19:40:05 +00:00
}
for (tmp = users; tmp; tmp = tmp->next) {
if ((strcmp(tmp->server, server) == 0) && (strcmp(tmp->realname, realname) == 0) && (strcmp(tmp->name, name) == 0)) {
pthread_mutex_lock(&b_mutex);
2005-04-22 20:01:21 +00:00
strncpy(tmp->nick, nick, 9);
2005-04-22 19:40:05 +00:00
pthread_mutex_unlock(&b_mutex);
found = TRUE;
Syslog('+', "IBC: user %s set nick to %s", name, nick);
usrchg = TRUE;
}
}
if (!found) {
2005-05-01 20:46:30 +00:00
send_msg(tnsl, "404 %s@%s: Can't change nick\r\n", name, server);
return 404;
2005-04-22 19:40:05 +00:00
}
broadcast(hostname, "NICK %s %s %s %s\r\n", nick, name, server, realname);
return 0;
}
2005-04-27 18:02:30 +00:00
int command_join(char *hostname, char *parameters)
2005-04-23 15:35:39 +00:00
{
ncs_list *tnsl;
chn_list *tmp;
usr_list *tmpu;
2005-04-27 20:54:13 +00:00
char *nick, *server, *channel, msg[81];
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int found;
for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if (strcmp(tnsl->server, hostname) == 0) {
break;
}
}
2005-04-23 15:47:48 +00:00
nick = strtok(parameters, "@\0");
2005-04-23 15:35:39 +00:00
server = strtok(NULL, " \0");
channel = strtok(NULL, "\0");
if (channel == NULL) {
2005-05-01 20:46:30 +00:00
send_msg(tnsl, "400 JOIN: Not enough parameters\r\n");
return 400;
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}
if (strlen(channel) > 20) {
2005-05-01 20:46:30 +00:00
send_msg(tnsl, "402 %s: Erroneous channelname\r\n", nick);
return 402;
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}
if (strcasecmp(channel, "#sysop") == 0) {
Syslog('+', "IBC: ignored JOIN for #sysop channel");
return 0;
}
2005-04-23 15:35:39 +00:00
found = FALSE;
for (tmp = channels; tmp; tmp = tmp->next) {
if (strcmp(tmp->name, channel) == 0) {
found = TRUE;
tmp->users++;
break;
}
}
if (!found) {
Syslog('+', "IBC: create channel %s owned by %s@%s", channel, nick, server);
add_channel(&channels, channel, nick, server);
2005-04-27 20:54:13 +00:00
system_shout("* New channel %s created by %s@%s", channel, nick, server);
2005-04-23 15:35:39 +00:00
}
for (tmpu = users; tmpu; tmpu = tmpu->next) {
2005-04-27 21:26:03 +00:00
if ((strcmp(tmpu->server, server) == 0) && ((strcmp(tmpu->nick, nick) == 0) || (strcmp(tmpu->name, nick) == 0))) {
2005-04-23 15:35:39 +00:00
pthread_mutex_lock(&b_mutex);
strncpy(tmpu->channel, channel, 20);
pthread_mutex_unlock(&b_mutex);
Syslog('+', "IBC: user %s joined channel %s", nick, channel);
usrchg = TRUE;
2005-08-29 21:03:28 +00:00
snprintf(msg, 81, "* %s@%s has joined %s", nick, server, channel);
2005-04-27 20:54:13 +00:00
chat_msg(channel, NULL, msg);
2005-04-23 15:35:39 +00:00
}
}
2005-04-23 15:56:22 +00:00
broadcast(hostname, "JOIN %s@%s %s\r\n", nick, server, channel);
2005-04-23 15:35:39 +00:00
chnchg = TRUE;
2005-04-27 18:02:30 +00:00
return 0;
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}
2005-04-27 18:02:30 +00:00
int command_part(char *hostname, char *parameters)
2005-04-23 15:35:39 +00:00
{
ncs_list *tnsl;
chn_list *tmp;
usr_list *tmpu;
2005-04-27 20:54:13 +00:00
char *nick, *server, *channel, *message, msg[81];
2005-04-23 15:35:39 +00:00
for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if (strcmp(tnsl->server, hostname) == 0) {
break;
}
}
2005-04-23 15:47:48 +00:00
nick = strtok(parameters, "@\0");
2005-04-23 15:35:39 +00:00
server = strtok(NULL, " \0");
2005-04-24 12:14:39 +00:00
channel = strtok(NULL, " \0");
message = strtok(NULL, "\0");
2005-04-23 15:35:39 +00:00
if (channel == NULL) {
2005-05-01 20:46:30 +00:00
send_msg(tnsl, "400 PART: Not enough parameters\r\n");
return 400;
2005-04-23 15:35:39 +00:00
}
if (strcasecmp(channel, "#sysop") == 0) {
Syslog('+', "IBC: ignored PART from #sysop channel");
return 0;
}
2005-04-23 15:35:39 +00:00
for (tmp = channels; tmp; tmp = tmp->next) {
if (strcmp(tmp->name, channel) == 0) {
chnchg = TRUE;
tmp->users--;
if (tmp->users == 0) {
Syslog('+', "IBC: deleted empty channel %s", channel);
del_channel(&channels, channel);
}
break;
}
}
for (tmpu = users; tmpu; tmpu = tmpu->next) {
2005-04-27 21:26:03 +00:00
if ((strcmp(tmpu->server, server) == 0) && ((strcmp(tmpu->nick, nick) == 0) || (strcmp(tmpu->name, nick) == 0))) {
2005-04-23 15:35:39 +00:00
pthread_mutex_lock(&b_mutex);
tmpu->channel[0] = '\0';
pthread_mutex_unlock(&b_mutex);
2005-04-27 20:54:13 +00:00
if (message) {
2005-04-24 12:14:39 +00:00
Syslog('+', "IBC: user %s left channel %s: %s", nick, channel, message);
2005-08-29 21:03:28 +00:00
snprintf(msg, 81, "* %s@%s has left: %s", nick, server, message);
2005-04-27 20:54:13 +00:00
} else {
2005-04-24 12:14:39 +00:00
Syslog('+', "IBC: user %s left channel %s", nick, channel);
2005-08-29 21:03:28 +00:00
snprintf(msg, 81, "* %s@%s has silently left this channel", nick, server);
2005-04-27 20:54:13 +00:00
}
chat_msg(channel, NULL, msg);
2005-04-23 15:35:39 +00:00
usrchg = TRUE;
}
}
2005-04-23 15:56:22 +00:00
2005-04-24 12:14:39 +00:00
if (message)
broadcast(hostname, "PART %s@%s %s %s\r\n", nick, server, channel, message);
else
broadcast(hostname, "PART %s@%s %s\r\n", nick, server, channel);
2005-04-27 18:02:30 +00:00
return 0;
2005-04-23 15:35:39 +00:00
}
2005-04-27 18:02:30 +00:00
int command_topic(char *hostname, char *parameters)
2005-04-23 15:35:39 +00:00
{
ncs_list *tnsl;
chn_list *tmp;
2005-04-27 20:54:13 +00:00
char *channel, *topic, msg[81];
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for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if (strcmp(tnsl->server, hostname) == 0) {
break;
}
}
channel = strtok(parameters, " \0");
topic = strtok(NULL, "\0");
if (topic == NULL) {
2005-05-01 20:46:30 +00:00
send_msg(tnsl, "400 TOPIC: Not enough parameters\r\n");
return 400;
2005-04-23 15:35:39 +00:00
}
for (tmp = channels; tmp; tmp = tmp->next) {
if (strcmp(tmp->name, channel) == 0) {
chnchg = TRUE;
2005-12-17 19:59:29 +00:00
pthread_mutex_lock(&b_mutex);
2005-04-23 15:35:39 +00:00
strncpy(tmp->topic, topic, 54);
2005-12-17 19:59:29 +00:00
pthread_mutex_unlock(&b_mutex);
2005-04-23 15:35:39 +00:00
Syslog('+', "IBC: channel %s topic: %s", channel, topic);
2005-08-29 21:03:28 +00:00
snprintf(msg, 81, "* Channel topic is now: %s", tmp->topic);
2005-04-27 20:54:13 +00:00
chat_msg(channel, NULL, msg);
2005-04-27 19:52:51 +00:00
break;
2005-04-23 15:35:39 +00:00
}
}
2005-04-23 15:56:22 +00:00
broadcast(hostname, "TOPIC %s %s\r\n", channel, topic);
2005-04-27 18:02:30 +00:00
return 0;
}
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int command_privmsg(char *hostname, char *parameters)
{
ncs_list *tnsl;
chn_list *tmp;
char *channel, *msg;
for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if (strcmp(tnsl->server, hostname) == 0) {
break;
}
}
channel = strtok(parameters, " \0");
msg = strtok(NULL, "\0");
if (msg == NULL) {
send_msg(tnsl, "412 PRIVMSG: No text to send\r\n");
return 412;
}
if (channel[0] != '#') {
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send_msg(tnsl, "499 PRIVMSG: Not for a channel\r\n"); // FIXME: also check users
return 499;
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}
for (tmp = channels; tmp; tmp = tmp->next) {
if (strcmp(tmp->name, channel) == 0) {
tmp->lastmsg = now;
chat_msg(channel, NULL, msg);
broadcast(hostname, "PRIVMSG %s %s\r\n", channel, msg);
return 0;
}
}
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send_msg(tnsl, "409 %s: Cannot sent to channel\r\n", channel);
return 409;
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}
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int do_command(char *hostname, char *command, char *parameters)
{
ncs_list *tnsl;
for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if (strcmp(tnsl->server, hostname) == 0) {
break;
}
}
/*
* First the commands that don't have parameters
*/
if (! strcmp(command, (char *)"PING")) {
send_msg(tnsl, "PONG\r\n");
return 0;
}
if (! strcmp(command, (char *)"PONG")) {
/*
* Just accept, but reset halfdead counter.
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*/
if (tnsl->halfdead) {
Syslog('r', "IBC: Reset halfdead counter");
tnsl->halfdead = 0;
srvchg = TRUE;
}
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return 0;
}
/*
* Commands with parameters
*/
if (parameters == NULL) {
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send_msg(tnsl, "400 %s: Not enough parameters\r\n", command);
return 400;
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}
if (! strcmp(command, (char *)"PASS")) {
return command_pass(hostname, parameters);
}
if (! strcmp(command, (char *)"SERVER")) {
return command_server(hostname, parameters);
}
if (! strcmp(command, (char *)"SQUIT")) {
return command_squit(hostname, parameters);
}
if (! strcmp(command, (char *)"USER")) {
return command_user(hostname, parameters);
}
if (! strcmp(command, (char *)"QUIT")) {
return command_quit(hostname, parameters);
}
if (! strcmp(command, (char *)"NICK")) {
return command_nick(hostname, parameters);
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}
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if (! strcmp(command, (char *)"JOIN")) {
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return command_join(hostname, parameters);
}
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if (! strcmp(command, (char *)"PART")) {
return command_part(hostname, parameters);
}
if (! strcmp(command, (char *)"TOPIC")) {
return command_topic(hostname, parameters);
}
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if (! strcmp(command, (char *)"PRIVMSG")) {
return command_privmsg(hostname, parameters);
}
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send_msg(tnsl, "413 %s: Unknown command\r\n", command);
return 413;
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}
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void receiver(struct servent *se)
{
struct pollfd pfd;
struct hostent *hp, *tp;
struct in_addr in;
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int rc, len, inlist;
socklen_t sl;
ncs_list *tnsl;
char *hostname, *command, *parameters, *ipaddress;
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pfd.fd = ls;
pfd.events = POLLIN;
pfd.revents = 0;
if ((rc = poll(&pfd, 1, 1000) < 0)) {
Syslog('r', "$IBC: poll/select failed");
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return;
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}
now = time(NULL);
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if (pfd.revents & POLLIN || pfd.revents & POLLERR || pfd.revents & POLLHUP || pfd.revents & POLLNVAL) {
sl = sizeof(myaddr_in);
memset(&clientaddr_in, 0, sizeof(struct sockaddr_in));
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memset(&crbuf, 0, sizeof(crbuf));
if ((len = recvfrom(ls, &crbuf, sizeof(crbuf)-1, 0,(struct sockaddr *)&clientaddr_in, &sl)) != -1) {
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hp = gethostbyaddr((char *)&clientaddr_in.sin_addr, sizeof(struct in_addr), clientaddr_in.sin_family);
if (hp == NULL)
hostname = inet_ntoa(clientaddr_in.sin_addr);
else
hostname = hp->h_name;
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if ((crbuf[strlen(crbuf) -2] != '\r') && (crbuf[strlen(crbuf) -1] != '\n')) {
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Syslog('!', "IBC: got message not terminated with CR-LF, dropped");
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return;
}
/*
* First check fr a fixed IP address.
*/
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inlist = FALSE;
for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if (strcmp(tnsl->server, hostname) == 0) {
inlist = TRUE;
break;
}
}
if (!inlist) {
/*
* Check for dynamic dns address
*/
ipaddress = xstrcpy(inet_ntoa(clientaddr_in.sin_addr));
for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if (tnsl->dyndns) {
tp = gethostbyname(tnsl->server);
if (tp != NULL) {
memcpy(&in, tp->h_addr, tp->h_length);
if (strcmp(inet_ntoa(in), ipaddress) == 0) {
/*
* Store the back resolved IP fqdn for reference and change the
* FQDN to the one from the setup, so we continue to use the
* dynamic FQDN.
*/
strncpy(tnsl->resolved, hostname, 63);
inlist = TRUE;
// Syslog('r', "IBC: setting '%s' to dynamic dns '%s'", tnsl->resolved, tnsl->server);
hostname = tnsl->server;
break;
}
}
}
}
free(ipaddress);
}
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if (!inlist) {
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Syslog('r', "IBC: message from unknown host (%s), dropped", hostname);
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return;
}
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if (tnsl->state == NCS_INIT) {
Syslog('r', "IBC: message received from %s while in init state, dropped", hostname);
return;
}
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tnsl->last = now;
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crbuf[strlen(crbuf) -2] = '\0';
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#ifndef PING_PONG_LOG
if (strcmp(crbuf, (char *)"PING") && strcmp(crbuf, (char *)"PONG"))
#endif
Syslog('r', "IBC: < %s: \"%s\"", hostname, printable(crbuf, 0));
2005-04-17 14:14:56 +00:00
/*
* Parse message
*/
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command = strtok(crbuf, " \0");
parameters = strtok(NULL, "\0");
2005-04-18 08:54:55 +00:00
2005-04-27 18:02:30 +00:00
if (atoi(command)) {
2005-04-18 10:37:35 +00:00
Syslog('r', "IBC: Got error %d", atoi(command));
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} else {
do_command(hostname, command, parameters);
2005-04-17 14:14:56 +00:00
}
} else {
Syslog('r', "IBC: recvfrom returned len=%d", len);
2005-04-17 14:14:56 +00:00
}
}
2005-04-15 21:36:44 +00:00
}
/*
2005-04-17 10:32:41 +00:00
* IBC thread
2005-04-15 21:36:44 +00:00
*/
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void *ibc_thread(void *dummy)
2005-04-15 21:36:44 +00:00
{
2005-04-16 16:08:32 +00:00
struct servent *se;
2005-04-18 11:38:44 +00:00
ncs_list *tnsl;
2005-04-17 10:32:41 +00:00
Syslog('+', "Starting IBC thread");
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if ((se = getservbyname("fido", "udp")) == NULL) {
2005-04-18 08:54:55 +00:00
Syslog('!', "IBC: no fido udp entry in /etc/services, cannot start Internet BBS Chat");
2005-04-16 16:08:32 +00:00
goto exit;
}
2005-04-17 10:32:41 +00:00
myaddr_in.sin_family = AF_INET;
myaddr_in.sin_addr.s_addr = INADDR_ANY;
myaddr_in.sin_port = se->s_port;
2005-04-18 10:37:35 +00:00
Syslog('+', "IBC: listen on %s, port %d", inet_ntoa(myaddr_in.sin_addr), ntohs(myaddr_in.sin_port));
2005-04-17 10:32:41 +00:00
ls = socket(AF_INET, SOCK_DGRAM, 0);
if (ls == -1) {
2005-04-18 08:54:55 +00:00
Syslog('!', "$IBC: can't create listen socket");
2005-04-17 10:32:41 +00:00
goto exit;
}
if (bind(ls, (struct sockaddr *)&myaddr_in, sizeof(struct sockaddr_in)) == -1) {
2005-04-18 08:54:55 +00:00
Syslog('!', "$IBC: can't bind listen socket");
2005-04-17 10:32:41 +00:00
goto exit;
}
2005-04-16 14:49:58 +00:00
ibc_run = TRUE;
2005-04-18 20:36:22 +00:00
srand(getpid());
resettime = time(NULL) + (time_t)86400;
2005-04-15 21:36:44 +00:00
while (! T_Shutdown) {
2005-04-18 15:19:38 +00:00
2005-04-17 10:32:41 +00:00
/*
* Check neighbour servers state
*/
2005-05-08 17:52:53 +00:00
now = time(NULL);
2005-04-17 10:32:41 +00:00
check_servers();
/*
* Get any incoming messages
*/
2005-04-17 14:14:56 +00:00
receiver(se);
2005-04-15 21:36:44 +00:00
}
2005-04-18 11:43:16 +00:00
Syslog('r', "IBC: start shutdown connections");
for (tnsl = ncsl; tnsl; tnsl = tnsl->next) {
if (tnsl->state == NCS_CONNECT) {
2005-04-21 21:12:50 +00:00
send_msg(tnsl, "SQUIT %s System shutdown\r\n", tnsl->myname);
2005-04-18 11:43:16 +00:00
}
}
2005-04-18 14:28:41 +00:00
tidy_servers(&servers);
2005-04-16 16:08:32 +00:00
exit:
2005-04-16 14:49:58 +00:00
ibc_run = FALSE;
Syslog('+', "IBC thread stopped");
2005-04-15 21:36:44 +00:00
pthread_exit(NULL);
}