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/*
* Unreal Internet Relay Chat Daemon, src/serv.c
* Copyright (C) 1990 Jarkko Oikarinen and
* University of Oulu, Computing Center
*
* See file AUTHORS in IRC package for additional names of
* the programmers.
*
* This program 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 1, or (at your option)
* any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/** @file
* @brief Server-related functions
*/
/* s_serv.c 2.55 2/7/94 (C) 1988 University of Oulu, Computing Center and Jarkko Oikarinen */
#include "unrealircd.h"
#include <ares.h>
#ifndef _WIN32
/* for uname(), is POSIX so should be OK... */
#include <sys/utsname.h>
#endif
MODVAR int max_connection_count = 1, max_client_count = 1;
extern int do_garbage_collect;
/* We need all these for cached MOTDs -- codemastr */
extern char *buildid;
MOTDFile opermotd;
MOTDFile rules;
MOTDFile motd;
MOTDFile svsmotd;
MOTDFile botmotd;
MOTDFile smotd;
/** Hash list of TKL entries */
MODVAR TKL *tklines[TKLISTLEN];
/** 2D hash list of TKL entries + IP address */
MODVAR TKL *tklines_ip_hash[TKLIPHASHLEN1][TKLIPHASHLEN2];
int MODVAR spamf_ugly_vchanoverride = 0;
void read_motd(const char *filename, MOTDFile *motd);
void do_read_motd(const char *filename, MOTDFile *themotd);
#ifdef USE_LIBCURL
void read_motd_async_downloaded(const char *url, const char *filename, const char *errorbuf, int cached, MOTDDownload *motd_download);
#endif
extern MOTDLine *find_file(char *, short);
void reread_motdsandrules();
/** Send a message upstream if necessary and check if it's for us.
* @param client The sender
* @param mtags Message tags associated with this message
* @param command The command (eg: "NOTICE")
* @param server This indicates parv[server] contains the destination
* @param parc Parameter count (MAX 8!!)
* @param parv Parameter values (MAX 8!!)
* @note Command can have only max 8 parameters (parv[8])
* @note parv[server] is replaced with the name of the matched client.
*/
int hunt_server(Client *client, MessageTag *mtags, char *command, int server, int parc, char *parv[])
{
Client *acptr;
char *saved;
/* This would be strange and bad. Previous version assumed "it's for me". Hmm.. okay. */
if (parc <= server || BadPtr(parv[server]))
return HUNTED_ISME;
acptr = find_client(parv[server], NULL);
/* find_client() may find a variety of clients. Only servers/persons please, no 'unknowns'. */
if (acptr && MyConnect(acptr) && !IsMe(acptr) && !IsUser(acptr) && !IsServer(acptr))
acptr = NULL;
if (!acptr)
{
sendnumeric(client, ERR_NOSUCHSERVER, parv[server]);
return HUNTED_NOSUCH;
}
if (IsMe(acptr) || MyUser(acptr))
return HUNTED_ISME;
/* Never send the message back from where it came from */
if (acptr->direction == client->direction)
{
sendnumeric(client, ERR_NOSUCHSERVER, parv[server]);
return HUNTED_NOSUCH;
}
/* Replace "server" part with actual servername (eg: 'User' -> 'x.y.net')
* Ugly. Previous version didn't even restore the state, now we do.
*/
saved = parv[server];
parv[server] = acptr->id;
sendto_one(acptr, mtags, command, client->id,
parv[1], parv[2], parv[3], parv[4],
parv[5], parv[6], parv[7], parv[8]);
parv[server] = saved;
return HUNTED_PASS;
}
#ifndef _WIN32
/** Grab operating system name on Windows (outdated) */
char *getosname(void)
{
static char buf[1024];
struct utsname osinf;
char *p;
memset(&osinf, 0, sizeof(osinf));
if (uname(&osinf) != 0)
return "<unknown>";
snprintf(buf, sizeof(buf), "%s %s %s %s %s",
osinf.sysname,
osinf.nodename,
osinf.release,
osinf.version,
osinf.machine);
/* get rid of cr/lf */
for (p=buf; *p; p++)
if ((*p == '\n') || (*p == '\r'))
{
*p = '\0';
break;
}
return buf;
}
#endif
/** Helper function to send version strings */
void send_version(Client *client, int reply)
{
int i;
for (i = 0; ISupportStrings[i]; i++)
sendnumeric(client, reply, ISupportStrings[i]);
}
/** VERSION command:
* Syntax: VERSION [server]
*/
CMD_FUNC(cmd_version)
{
/* Only allow remote VERSIONs if registered -- Syzop */
if (!IsUser(client) && !IsServer(client))
{
send_version(client, RPL_ISUPPORT);
return;
}
if (hunt_server(client, recv_mtags, ":%s VERSION :%s", 1, parc, parv) == HUNTED_ISME)
{
sendnumeric(client, RPL_VERSION, version, debugmode, me.name,
(ValidatePermissionsForPath("server:info",client,NULL,NULL,NULL) ? serveropts : "0"),
extraflags ? extraflags : "",
tainted ? "3" : "",
(ValidatePermissionsForPath("server:info",client,NULL,NULL,NULL) ? MYOSNAME : "*"),
UnrealProtocol);
if (ValidatePermissionsForPath("server:info",client,NULL,NULL,NULL))
{
sendnotice(client, "%s", SSLeay_version(SSLEAY_VERSION));
sendnotice(client, "libsodium %s", sodium_version_string());
#ifdef USE_LIBCURL
sendnotice(client, "%s", curl_version());
#endif
sendnotice(client, "c-ares %s", ares_version(NULL));
sendnotice(client, "%s", pcre2_version());
}
if (MyUser(client))
send_version(client,RPL_ISUPPORT);
else
send_version(client,RPL_REMOTEISUPPORT);
}
}
char *num = NULL;
/** Send all our PROTOCTL messages to remote server.
* We send multiple PROTOCTL's since 4.x. If this breaks your services
* because you fail to maintain PROTOCTL state, then fix them!
*/
void send_proto(Client *client, ConfigItem_link *aconf)
{
ISupport *prefix = ISupportFind("PREFIX");
/* CAUTION: If adding a token to an existing PROTOCTL line below,
* then ensure that MAXPARA is not reached!
*/
/* First line */
sendto_one(client, NULL, "PROTOCTL NOQUIT NICKv2 SJOIN SJOIN2 UMODE2 VL SJ3 TKLEXT TKLEXT2 NICKIP ESVID %s %s",
iConf.ban_setter_sync ? "SJSBY" : "",
ClientCapabilityFindReal("message-tags") ? "MTAGS" : "");
/* Second line */
sendto_one(client, NULL, "PROTOCTL CHANMODES=%s%s,%s%s,%s%s,%s%s USERMODES=%s BOOTED=%lld PREFIX=%s SID=%s MLOCK TS=%lld EXTSWHOIS",
CHPAR1, EXPAR1, CHPAR2, EXPAR2, CHPAR3, EXPAR3, CHPAR4, EXPAR4,
umodestring, (long long)me.local->since, prefix->value,
me.id, (long long)TStime());
/* Third line */
sendto_one(client, NULL, "PROTOCTL NICKCHARS=%s CHANNELCHARS=%s",
charsys_get_current_languages(),
allowed_channelchars_valtostr(iConf.allowed_channelchars));
}
#ifndef IRCDTOTALVERSION
#define IRCDTOTALVERSION BASE_VERSION "-" PATCH1 PATCH2 PATCH3 PATCH4 PATCH5 PATCH6 PATCH7 PATCH8 PATCH9
#endif
/** Special filter for remote commands */
int remotecmdfilter(Client *client, int parc, char *parv[])
{
/* no remote requests permitted from non-ircops */
if (MyUser(client) && !ValidatePermissionsForPath("server:remote",client,NULL,NULL,NULL) && !BadPtr(parv[1]))
{
parv[1] = NULL;
parc = 1;
}
/* same as above, but in case an old server forwards a request to us: we ignore it */
if (!MyUser(client) && !ValidatePermissionsForPath("server:remote",client,NULL,NULL,NULL))
return 1; /* STOP (return) */
return 0; /* Continue */
}
/** Output for /INFO */
char *unrealinfo[] =
{
"This release was brought to you by the following people:",
"",
"Head coder:",
"* Bram Matthys (Syzop) <syzop@unrealircd.org>",
"",
"Coders:",
"* Gottem <gottem@unrealircd.org>",
"* i <i@unrealircd.org>",
"",
"Past UnrealIRCd 4.x coders/contributors:",
"* Heero, binki, nenolod, ..",
"",
"Past UnrealIRCd 3.2.x coders/contributors:",
"* Stskeeps (ret. head coder / project leader)",
"* codemastr (ret. u3.2 head coder)",
"* aquanight, WolfSage, ..",
"* McSkaf, Zogg, NiQuiL, chasm, llthangel, nighthawk, ..",
NULL
};
/** Send /INFO output */
void cmd_info_send(Client *client)
{
char **text = unrealinfo;
sendnumericfmt(client, RPL_INFO, ":========== %s ==========", IRCDTOTALVERSION);
while (*text)
sendnumericfmt(client, RPL_INFO, ":| %s", *text++);
sendnumericfmt(client, RPL_INFO, ":|");
sendnumericfmt(client, RPL_INFO, ":|");
sendnumericfmt(client, RPL_INFO, ":| Credits - Type /CREDITS");
sendnumericfmt(client, RPL_INFO, ":|");
sendnumericfmt(client, RPL_INFO, ":| This is an UnrealIRCd-style server");
sendnumericfmt(client, RPL_INFO, ":| If you find any bugs, please report them at:");
sendnumericfmt(client, RPL_INFO, ":| https://bugs.unrealircd.org/");
sendnumericfmt(client, RPL_INFO, ":| UnrealIRCd Homepage: https://www.unrealircd.org");
sendnumericfmt(client, RPL_INFO, ":============================================");
sendnumericfmt(client, RPL_INFO, ":Birth Date: %s, compile # %s", creation, generation);
sendnumericfmt(client, RPL_INFO, ":On-line since %s", myctime(me.local->firsttime));
sendnumericfmt(client, RPL_INFO, ":ReleaseID (%s)", buildid);
sendnumeric(client, RPL_ENDOFINFO);
}
/** The INFO command.
* Syntax: INFO [server]
*/
CMD_FUNC(cmd_info)
{
if (remotecmdfilter(client, parc, parv))
return;
if (hunt_server(client, recv_mtags, ":%s INFO :%s", 1, parc, parv) == HUNTED_ISME)
cmd_info_send(client);
}
/** LICENSE command
* Syntax: LICENSE [server]
*/
CMD_FUNC(cmd_license)
{
char **text = gnulicense;
if (remotecmdfilter(client, parc, parv))
return;
if (hunt_server(client, recv_mtags, ":%s LICENSE :%s", 1, parc, parv) == HUNTED_ISME)
{
while (*text)
sendnumeric(client, RPL_INFO, *text++);
sendnumeric(client, RPL_INFO, "");
sendnumeric(client, RPL_ENDOFINFO);
}
}
/** CREDITS command
* Syntax: CREDITS [servername]
*/
CMD_FUNC(cmd_credits)
{
char **text = unrealcredits;
if (remotecmdfilter(client, parc, parv))
return;
if (hunt_server(client, recv_mtags, ":%s CREDITS :%s", 1, parc, parv) == HUNTED_ISME)
{
while (*text)
sendnumeric(client, RPL_INFO, *text++);
sendnumeric(client, RPL_INFO, "");
sendnumericfmt(client, RPL_INFO, ":Birth Date: %s, compile # %s", creation, generation);
sendnumericfmt(client, RPL_INFO, ":On-line since %s", myctime(me.local->firsttime));
sendnumeric(client, RPL_ENDOFINFO);
}
}
/** Return flags for a client (connection), eg 's' for SSL/TLS - used in STATS L/l */
char *get_client_status(Client *client)
{
static char buf[10];
char *p = buf;
*p = '\0';
*p++ = '[';
if (IsListening(client))
{
if (client->umodes & LISTENER_NORMAL)
*p++ = '*';
if (client->umodes & LISTENER_SERVERSONLY)
*p++ = 'S';
if (client->umodes & LISTENER_CLIENTSONLY)
*p++ = 'C';
if (client->umodes & LISTENER_TLS)
*p++ = 's';
}
else
{
if (IsTLS(client))
*p++ = 's';
}
*p++ = ']';
*p++ = '\0';
return (buf);
}
/** Used to blank out ports -- Barubary - only used in STATS l/L */
char *get_client_name2(Client *client, int showports)
{
char *pointer = get_client_name(client, TRUE);
if (!pointer)
return NULL;
if (showports)
return pointer;
if (!strrchr(pointer, '.'))
return NULL;
/*
* This may seem like wack but remind this is only used
* in rows of get_client_name2's, so it's perfectly fair
*
*/
strcpy(strrchr(pointer, '.'), ".0]");
return pointer;
}
/** ERROR command - used by servers to indicate errors.
* Syntax: ERROR :<reason>
*/
CMD_FUNC(cmd_error)
{
char *para;
if (!MyConnect(client))
return;
para = (parc > 1 && *parv[1] != '\0') ? parv[1] : "<>";
/* Errors from untrusted sources only go to the junk snomask
* (which is only for debugging issues and such).
* This to prevent flooding and confusing IRCOps by
* malicious users.
*/
if (!IsServer(client) && !client->serv)
{
sendto_snomask(SNO_JUNK, "ERROR from server %s: %s",
get_client_name(client, FALSE), para);
return;
}
sendto_umode_global(UMODE_OPER, "ERROR from server %s: %s",
get_client_name(client, FALSE), para);
ircd_log(LOG_ERROR, "ERROR from server %s: %s",
get_client_name(client, FALSE), para);
}
/** Save the tunefile (such as: highest seen connection count) */
EVENT(save_tunefile)
{
FILE *tunefile;
tunefile = fopen(conf_files->tune_file, "w");
if (!tunefile)
{
#if !defined(_WIN32) && !defined(_AMIGA)
sendto_ops("Unable to write tunefile.. %s", strerror(errno));
#else
sendto_ops("Unable to write tunefile..");
#endif
return;
}
fprintf(tunefile, "0\n");
fprintf(tunefile, "%d\n", irccounts.me_max);
fclose(tunefile);
}
/** Load the tunefile (such as: highest seen connection count) */
void load_tunefile(void)
{
FILE *tunefile;
char buf[1024];
tunefile = fopen(conf_files->tune_file, "r");
if (!tunefile)
return;
fprintf(stderr, "Loading tunefile..\n");
if (!fgets(buf, sizeof(buf), tunefile))
fprintf(stderr, "Warning: error while reading the timestamp offset from the tunefile%s%s\n",
errno? ": ": "", errno? strerror(errno): "");
if (!fgets(buf, sizeof(buf), tunefile))
fprintf(stderr, "Warning: error while reading the peak user count from the tunefile%s%s\n",
errno? ": ": "", errno? strerror(errno): "");
irccounts.me_max = atol(buf);
fclose(tunefile);
}
/** Rehash motd and rule files (motd_file/rules_file and all tld entries). */
void rehash_motdrules()
{
ConfigItem_tld *tlds;
reread_motdsandrules();
for (tlds = conf_tld; tlds; tlds = tlds->next)
{
/* read_motd() accepts NULL in first arg and acts sanely */
read_motd(tlds->motd_file, &tlds->motd);
read_motd(tlds->rules_file, &tlds->rules);
read_motd(tlds->smotd_file, &tlds->smotd);
read_motd(tlds->opermotd_file, &tlds->opermotd);
read_motd(tlds->botmotd_file, &tlds->botmotd);
}
}
/** Rehash motd and rules (only the default files) */
void reread_motdsandrules()
{
read_motd(conf_files->motd_file, &motd);
read_motd(conf_files->rules_file, &rules);
read_motd(conf_files->smotd_file, &smotd);
read_motd(conf_files->botmotd_file, &botmotd);
read_motd(conf_files->opermotd_file, &opermotd);
read_motd(conf_files->svsmotd_file, &svsmotd);
}
extern void reinit_resolver(Client *client);
/** REHASH command - reload configuration file on server(s).
* Syntax: see HELPOP REHASH
*/
CMD_FUNC(cmd_rehash)
{
int x = 0;
/* This is one of the (few) commands that cannot be handled
* by labeled-response accurately in all circumstances.
*/
labeled_response_inhibit = 1;
if (!ValidatePermissionsForPath("server:rehash",client,NULL,NULL,NULL))
{
sendnumeric(client, ERR_NOPRIVILEGES);
return;
}
if ((parc < 3) || BadPtr(parv[2])) {
/* If the argument starts with a '-' (like -motd, -opermotd, etc) then it's
* assumed not to be a server. -- Syzop
*/
if (parv[1] && (parv[1][0] == '-'))
x = HUNTED_ISME;
else
x = hunt_server(client, recv_mtags, ":%s REHASH :%s", 1, parc, parv);
} else {
if (match_simple("-glob*", parv[1])) /* This is really ugly... hack to make /rehash -global -something work */
{
x = HUNTED_ISME;
} else {
x = hunt_server(client, NULL, ":%s REHASH %s :%s", 1, parc, parv);
}
}
if (x != HUNTED_ISME)
return; /* Now forwarded or server didnt exist */
if (MyUser(client) && IsWebsocket(client))
{
sendnotice(client, "Sorry, for technical reasons it is not possible to REHASH "
"the local server from a WebSocket connection.");
/* Issue details:
* websocket_handle_packet -> process_packet -> parse_client_queued ->
* dopacket -> parse -> cmd_rehash... and then 'websocket' is unloaded so
* we "cannot get back" as that websocket_handle_packet function is gone.
*
* Solution would be either to delay the rehash or to make websocket perm.
* The latter removes all our ability to upgrade the module on the fly
* and the former is rather ugly.. not going to do that hassle now anyway.
*/
return;
}
if (!MyConnect(client))
{
#ifndef REMOTE_REHASH
sendnumeric(client, ERR_NOPRIVILEGES);
return;
#endif
if (parv[2] == NULL)
{
if (loop.ircd_rehashing)
{
sendnotice(client, "A rehash is already in progress");
return;
}
sendto_umode_global(UMODE_OPER, "%s is remotely rehashing server %s config file", client->name, me.name);
remote_rehash_client = client;
reread_motdsandrules();
// TODO: clean this next line up, wtf man.
rehash(client, (parc > 1) ? ((*parv[1] == 'q') ? 2 : 0) : 0);
return;
}
parv[1] = parv[2];
} else {
/* Ok this is in an 'else' because it should be only executed for local clients,
* but it's totally unrelated to the above ;).
*/
if (parv[1] && match_simple("-glob*", parv[1]))
{
/* /REHASH -global [options] */
Client *acptr;
/* Shift parv's to the left */
parv[1] = parv[2];
parv[2] = NULL;
parc--;
/* Only netadmins may use /REHASH -global, which is because:
* a) it makes sense
* b) remote servers don't support remote rehashes by non-netadmins
*/
if (!ValidatePermissionsForPath("server:rehash",client,NULL,NULL,NULL))
{
sendnumeric(client, ERR_NOPRIVILEGES);
sendnotice(client, "'/REHASH -global' requires you to have server::rehash permissions");
return;
}
if (parv[1] && *parv[1] != '-')
{
sendnotice(client, "You cannot specify a server name after /REHASH -global, for obvious reasons");
return;
}
/* Broadcast it in an inefficient, but backwards compatible way. */
list_for_each_entry(acptr, &global_server_list, client_node)
{
if (acptr == &me)
continue;
sendto_one(acptr, NULL, ":%s REHASH %s %s",
client->name,
acptr->name,
parv[1] ? parv[1] : "-all");
}
/* Don't return, continue, because we need to REHASH ourselves as well. */
}
}
if (!BadPtr(parv[1]) && strcasecmp(parv[1], "-all"))
{
if (!ValidatePermissionsForPath("server:rehash",client,NULL,NULL,NULL))
{
sendnumeric(client, ERR_NOPRIVILEGES);
return;
}
if (*parv[1] == '-')
{
if (!strncasecmp("-gar", parv[1], 4))
{
loop.do_garbage_collect = 1;
RunHook2(HOOKTYPE_REHASHFLAG, client, parv[1]);
return;
}
if (!strncasecmp("-dns", parv[1], 4))
{
reinit_resolver(client);
return;
}
if (match_simple("-ssl*", parv[1]) || match_simple("-tls*", parv[1]))
{
if (IsUser(client))
{
sendto_realops_and_log("%s (%s@%s) requested a reload of all SSL related data (/rehash -tls)",
client->name, client->user->username, client->user->realhost);
} else {
sendto_realops_and_log("%s requested a reload of all SSL related data (/rehash -tls)",
client->name);
}
reinit_tls();
return;
}
if (match_simple("-o*motd", parv[1]))
{
if (MyUser(client))
sendto_ops("Rehashing OPERMOTD on request of %s", client->name);
else
sendto_umode_global(UMODE_OPER, "Remotely rehashing OPERMOTD on request of %s", client->name);
read_motd(conf_files->opermotd_file, &opermotd);
RunHook2(HOOKTYPE_REHASHFLAG, client, parv[1]);
return;
}
if (match_simple("-b*motd", parv[1]))
{
if (MyUser(client))
sendto_ops("Rehashing BOTMOTD on request of %s", client->name);
else
sendto_umode_global(UMODE_OPER, "Remotely rehashing BOTMOTD on request of %s", client->name);
read_motd(conf_files->botmotd_file, &botmotd);
RunHook2(HOOKTYPE_REHASHFLAG, client, parv[1]);
return;
}
if (!strncasecmp("-motd", parv[1], 5) || !strncasecmp("-rules", parv[1], 6))
{
if (MyUser(client))
sendto_ops("Rehashing all MOTDs and RULES on request of %s", client->name);
else
sendto_umode_global(UMODE_OPER, "Remotely rehasing all MOTDs and RULES on request of %s", client->name);
rehash_motdrules();
RunHook2(HOOKTYPE_REHASHFLAG, client, parv[1]);
return;
}
RunHook2(HOOKTYPE_REHASHFLAG, client, parv[1]);
return;
}
}
else
{
if (loop.ircd_rehashing)
{
sendnotice(client, "A rehash is already in progress");
return;
}
sendto_ops("%s is rehashing server config file", client->name);
}
/* Normal rehash, rehash motds&rules too, just like the on in the tld block will :p */
sendnumeric(client, RPL_REHASHING, configfile);
// TODO: fix next line - occurence #2
x = rehash(client, (parc > 1) ? ((*parv[1] == 'q') ? 2 : 0) : 0);
reread_motdsandrules();
}
/** RESTART command - restart the server (discouraged command)
* parv[1] - password *OR* reason if no drpass { } block exists
* parv[2] - reason for restart (optional & only if drpass block exists)
*/
CMD_FUNC(cmd_restart)
{
char *reason = parv[1];
Client *acptr;
if (!MyUser(client))
return;
/* Check permissions */
if (!ValidatePermissionsForPath("server:restart",client,NULL,NULL,NULL))
{
sendnumeric(client, ERR_NOPRIVILEGES);
return;
}
/* Syntax: /restart */
if (parc == 1)
{
if (conf_drpass)
{
sendnumeric(client, ERR_NEEDMOREPARAMS, "RESTART");
return;
}
} else
if (parc >= 2)
{
/* Syntax: /restart <pass> [reason] */
if (conf_drpass)
{
if (!Auth_Check(client, conf_drpass->restartauth, parv[1]))
{
sendnumeric(client, ERR_PASSWDMISMATCH);
return;
}
reason = parv[2];
}
}
sendto_ops("Server is Restarting by request of %s", client->name);
list_for_each_entry(acptr, &lclient_list, lclient_node)
{
if (IsUser(acptr))
sendnotice(acptr, "Server Restarted by %s", client->name);
else if (IsServer(acptr))
sendto_one(acptr, NULL, ":%s ERROR :Restarted by %s: %s",
me.name, get_client_name(client, TRUE), reason ? reason : "No reason");
}
server_reboot(reason ? reason : "No reason");
}
/** Send short message of the day to the client */
void short_motd(Client *client)
{
ConfigItem_tld *tld;
MOTDFile *themotd;
MOTDLine *motdline;
struct tm *tm;
char is_short;
tm = NULL;
is_short = 1;
tld = find_tld(client);
/*
* Try different sources of short MOTDs, falling back to the
* long MOTD.
*/
themotd = &smotd;
if (tld && tld->smotd.lines)
themotd = &tld->smotd;
/* try long MOTDs */
if (!themotd->lines)
{
is_short = 0;
if (tld && tld->motd.lines)
themotd = &tld->motd;
else
themotd = &motd;
}
if (!themotd->lines)
{
sendnumeric(client, ERR_NOMOTD);
return;
}
if (themotd->last_modified.tm_year)
{
tm = &themotd->last_modified; /* for readability */
sendnumeric(client, RPL_MOTDSTART, me.name);
sendnumericfmt(client, RPL_MOTD, ":- %d/%d/%d %d:%02d", tm->tm_mday, tm->tm_mon + 1,
1900 + tm->tm_year, tm->tm_hour, tm->tm_min);
}
if (is_short)
{
sendnumeric(client, RPL_MOTD, "This is the short MOTD. To view the complete MOTD type /motd");
sendnumeric(client, RPL_MOTD, "");
}
motdline = NULL;
if (themotd)
motdline = themotd->lines;
while (motdline)
{
sendnumeric(client, RPL_MOTD, motdline->line);
motdline = motdline->next;
}
sendnumeric(client, RPL_ENDOFMOTD);
}
/*
* A merge from ircu and bahamut, and some extra stuff added by codemastr
* we can now use 1 function for multiple files -- codemastr
* Merged read_motd/read_rules stuff into this -- Syzop
*/
/** Read motd-like file, used for rules/motd/botmotd/opermotd/etc.
* Multiplexes to either directly reading the MOTD or downloading it asynchronously.
* @param filename Filename of file to read or URL. NULL is accepted and causes the *motd to be free()d.
* @param motd Reference to motd pointer (used for freeing if needed and for asynchronous remote MOTD support)
*/
void read_motd(const char *filename, MOTDFile *themotd)
{
#ifdef USE_LIBCURL
time_t modtime;
MOTDDownload *motd_download;
#endif
/* TODO: if themotd points to a tld's motd,
could a rehash disrupt this pointer?*/
#ifdef USE_LIBCURL
if(themotd->motd_download)
{
themotd->motd_download->themotd = NULL;
/*
* It is not our job to free() motd_download, the
* read_motd_async_downloaded() function will do that
* when it sees that ->themod == NULL.
*/
themotd->motd_download = NULL;
}
/* if filename is NULL, do_read_motd will catch it */
if(filename && url_is_valid(filename))
{
/* prepare our payload for read_motd_async_downloaded() */
motd_download = safe_alloc(sizeof(MOTDDownload));
motd_download->themotd = themotd;
themotd->motd_download = motd_download;
modtime = unreal_getfilemodtime(unreal_mkcache(filename));
download_file_async(filename, modtime, (vFP)read_motd_async_downloaded, motd_download);
return;
}
#endif /* USE_LIBCURL */
do_read_motd(filename, themotd);
return;
}
#ifdef USE_LIBCURL
/** Callback for download_file_async() called from read_motd() below.
* @param url the URL curl groked or NULL if the MOTD is stored locally.
* @param filename the path to the local copy of the MOTD or NULL if either cached=1 or there's an error.
* @param errorbuf NULL or an errorstring if there was an error while downloading the MOTD.
* @param cached 0 if the URL was downloaded freshly or 1 if the last download was canceled and the local copy should be used.
*/
void read_motd_async_downloaded(const char *url, const char *filename, const char *errorbuf, int cached, MOTDDownload *motd_download)
{
MOTDFile *themotd;
themotd = motd_download->themotd;
/*
check if the download was soft-canceled. See struct.h's docs on
struct MOTDDownload for details.
*/
if(!themotd)
{
safe_free(motd_download);
return;
}
/* errors -- check for specialcached version if applicable */
if(!cached && !filename)
{
if(has_cached_version(url))
{
config_warn("Error downloading MOTD file from \"%s\": %s -- using cached version instead.", displayurl(url), errorbuf);
filename = unreal_mkcache(url);
} else {
config_error("Error downloading MOTD file from \"%s\": %s", displayurl(url), errorbuf);
/* remove reference to this chunk of memory about to be freed. */
motd_download->themotd->motd_download = NULL;
safe_free(motd_download);
return;
}
}
/*
* We need to move our newly downloaded file to its cache file
* if it isn't there already.
*/
if(!cached)
{
/* create specialcached version for later */
unreal_copyfileex(filename, unreal_mkcache(url), 1);
} else {
/*
* The file is cached. Thus we must look for it at the
* cache location where we placed it earlier.
*/
filename = unreal_mkcache(url);
}
do_read_motd(filename, themotd);
safe_free(motd_download);
}
#endif /* USE_LIBCURL */
/** The actual reading of the MOTD - used by read_motd() and read_motd_async_downloaded()
*/
void do_read_motd(const char *filename, MOTDFile *themotd)
{
FILE *fd;
struct tm *tm_tmp;
time_t modtime;
char line[512];
char *tmp;
MOTDLine *last, *temp;
free_motd(themotd);
if(!filename)
return;
fd = fopen(filename, "r");
if (!fd)
return;
/* record file modification time */
modtime = unreal_getfilemodtime(filename);
tm_tmp = localtime(&modtime);
memcpy(&themotd->last_modified, tm_tmp, sizeof(struct tm));
last = NULL;
while (fgets(line, sizeof(line), fd))
{
if ((tmp = strchr(line, '\n')))
*tmp = '\0';
if ((tmp = strchr(line, '\r')))
*tmp = '\0';
if (strlen(line) > 510)
line[510] = '\0';
temp = safe_alloc(sizeof(MOTDLine));
safe_strdup(temp->line, line);
if(last)
last->next = temp;
else
/* handle the special case of the first line */
themotd->lines = temp;
last = temp;
}
/* the file could be zero bytes long? */
if(last)
last->next = NULL;
fclose(fd);
return;
}
/** Free the contents of a MOTDFile structure.
* The MOTDFile structure itself should be statically
* allocated and deallocated. If the caller wants, it must
* manually free the MOTDFile structure itself.
*/
void free_motd(MOTDFile *themotd)
{
MOTDLine *next, *motdline;
if(!themotd)
return;
for (motdline = themotd->lines; motdline; motdline = next)
{
next = motdline->next;
safe_free(motdline->line);
safe_free(motdline);
}
themotd->lines = NULL;
memset(&themotd->last_modified, '\0', sizeof(struct tm));
#ifdef USE_LIBCURL
/* see struct.h for more information about motd_download */
themotd->motd_download = NULL;
#endif
}
/** DIE command - terminate the server
* DIE [password]
*/
CMD_FUNC(cmd_die)
{
Client *acptr;
if (!MyUser(client))
return;
if (!ValidatePermissionsForPath("server:die",client,NULL,NULL,NULL))
{
sendnumeric(client, ERR_NOPRIVILEGES);
return;
}
if (conf_drpass) /* See if we have and DIE/RESTART password */
{
if (parc < 2) /* And if so, require a password :) */
{
sendnumeric(client, ERR_NEEDMOREPARAMS, "DIE");
return;
}
if (!Auth_Check(client, conf_drpass->dieauth, parv[1]))
{
sendnumeric(client, ERR_PASSWDMISMATCH);
return;
}
}
/* Let the +s know what is going on */
sendto_ops("Server Terminating by request of %s", client->name);
list_for_each_entry(acptr, &lclient_list, lclient_node)
{
if (IsUser(acptr))
sendnotice(acptr, "Server Terminated by %s",
client->name);
else if (IsServer(acptr))
sendto_one(acptr, NULL, ":%s ERROR :Terminated by %s",
me.name, get_client_name(client, TRUE));
}
s_die();
}
/** Server list (network) of pending connections */
PendingNet *pendingnet = NULL;
/** Add server list (network) from 'client' connection */
void add_pending_net(Client *client, char *str)
{
PendingNet *net;
PendingServer *srv;
char *p, *name;
if (BadPtr(str) || !client)
return;
/* Allocate */
net = safe_alloc(sizeof(PendingNet));
net->client = client;
/* Fill in */
if (*str == '*')
str++;
for (name = strtoken(&p, str, ","); name; name = strtoken(&p, NULL, ","))
{
if (!*name)
continue;
srv = safe_alloc(sizeof(PendingServer));
strlcpy(srv->sid, name, sizeof(srv->sid));
AddListItem(srv, net->servers);
}
AddListItem(net, pendingnet);
}
/** Free server list (network) previously added by 'client' */
void free_pending_net(Client *client)
{
PendingNet *net, *net_next;
PendingServer *srv, *srv_next;
for (net = pendingnet; net; net = net_next)
{
net_next = net->next;
if (net->client == client)
{
for (srv = net->servers; srv; srv = srv_next)
{
srv_next = srv->next;
safe_free(srv);
}
DelListItem(net, pendingnet);
safe_free(net);
/* Don't break, there can be multiple objects */
}
}
}
/** Find SID in any server list (network) that is pending, except 'exempt' */
PendingNet *find_pending_net_by_sid_butone(char *sid, Client *exempt)
{
PendingNet *net;
PendingServer *srv;
if (BadPtr(sid))
return NULL;
for (net = pendingnet; net; net = net->next)
{
if (net->client == exempt)
continue;
for (srv = net->servers; srv; srv = srv->next)
if (!strcmp(srv->sid, sid))
return net;
}
return NULL;
}
/** Search the pending connections list for any identical sids */
Client *find_pending_net_duplicates(Client *cptr, Client **srv, char **sid)
{
PendingNet *net, *other;
PendingServer *s;
*srv = NULL;
*sid = NULL;
for (net = pendingnet; net; net = net->next)
{
if (net->client != cptr)
continue;
/* Ok, found myself */
for (s = net->servers; s; s = s->next)
{
char *curr_sid = s->sid;
other = find_pending_net_by_sid_butone(curr_sid, cptr);
if (other)
{
*srv = net->client;
*sid = s->sid;
return other->client; /* Found another (pending) server with identical numeric */
}
}
}
return NULL;
}
/** Like find_pending_net_duplicates() but the other way around? Eh.. */
Client *find_non_pending_net_duplicates(Client *client)
{
PendingNet *net;
PendingServer *s;
Client *acptr;
for (net = pendingnet; net; net = net->next)
{
if (net->client != client)
continue;
/* Ok, found myself */
for (s = net->servers; s; s = s->next)
{
acptr = find_server(s->sid, NULL);
if (acptr)
return acptr; /* Found another (fully CONNECTED) server with identical numeric */
}
}
return NULL;
}
/** Parse CHANMODES= in PROTOCTL */
void parse_chanmodes_protoctl(Client *client, char *str)
{
char *modes, *p;
char copy[256];
strlcpy(copy, str, sizeof(copy));
modes = strtoken(&p, copy, ",");
if (modes)
{
safe_strdup(client->serv->features.chanmodes[0], modes);
modes = strtoken(&p, NULL, ",");
if (modes)
{
safe_strdup(client->serv->features.chanmodes[1], modes);
modes = strtoken(&p, NULL, ",");
if (modes)
{
safe_strdup(client->serv->features.chanmodes[2], modes);
modes = strtoken(&p, NULL, ",");
if (modes)
{
safe_strdup(client->serv->features.chanmodes[3], modes);
}
}
}
}
}
static char previous_langsinuse[512];
static int previous_langsinuse_ready = 0;
/** Check the nick character system (set::allowed-nickchars) for changes.
* If there are changes, then we broadcast the new PROTOCTL NICKCHARS= to all servers.
*/
void charsys_check_for_changes(void)
{
char *langsinuse = charsys_get_current_languages();
/* already called by charsys_finish() */
safe_strdup(me.serv->features.nickchars, langsinuse);
if (!previous_langsinuse_ready)
{
previous_langsinuse_ready = 1;
strlcpy(previous_langsinuse, langsinuse, sizeof(previous_langsinuse));
return; /* not booted yet. then we are done here. */
}
if (strcmp(langsinuse, previous_langsinuse))
{
ircd_log(LOG_ERROR, "Permitted nick characters changed at runtime: %s -> %s",
previous_langsinuse, langsinuse);
sendto_realops("Permitted nick characters changed at runtime: %s -> %s",
previous_langsinuse, langsinuse);
/* Broadcast change to all (locally connected) servers */
sendto_server(NULL, 0, 0, NULL, "PROTOCTL NICKCHARS=%s", langsinuse);
}
strlcpy(previous_langsinuse, langsinuse, sizeof(previous_langsinuse));
}
/** Check if supplied server name is valid, that is: does not contain forbidden characters etc */
int valid_server_name(char *name)
{
char *p;
if (strlen(name) >= HOSTLEN)
return 0;
for (p = name; *p; p++)
if ((*p <= ' ') || (*p > '~'))
return 0;
if (!strchr(name, '.'))
return 0;
return 1;
}
/** Check if the supplied name is a valid SID, as in: syntax. */
int valid_sid(char *name)
{
if (strlen(name) != 3)
return 0;
if (!isdigit(*name))
return 0;
if (!isdigit(name[1]) && !isupper(name[1]))
return 0;
if (!isdigit(name[2]) && !isupper(name[2]))
return 0;
return 1;
}
/** Check if the supplied name is a valid UID, as in: syntax. */
int valid_uid(char *name)
{
char *p;
/* Enforce at least some minimum length */
if (strlen(name) < 6)
return 0;
/* UID cannot be larger than IDLEN or it would be cut off later */
if (strlen(name) > IDLEN)
return 0;
/* Must start with a digit */
if (!isdigit(*name))
return 0;
/* For all the remaining characters: digit or uppercase character */
for (p = name+1; *p; p++)
if (!isdigit(*p) && !isupper(*p))
return 0;
return 1;
}
/** Initialize the TKL subsystem */
void tkl_init(void)
{
memset(tklines, 0, sizeof(tklines));
memset(tklines_ip_hash, 0, sizeof(tklines_ip_hash));
}
/** Called when a server link is lost.
* Used for logging only, API users can use the HOOKTYPE_SERVER_QUIT hook.
*/
void lost_server_link(Client *serv, FORMAT_STRING(const char *fmt), ...)
{
va_list vl;
static char buf[1024], buf2[512];
va_start(vl, fmt);
vsnprintf(buf2, sizeof(buf2), fmt, vl);
va_end(vl);
if (IsServer(serv))
{
/* An already established link is now lost. Broadcast this to all opers. */
snprintf(buf, sizeof(buf), "Lost server link to %s: %s",
get_client_name(serv, FALSE), buf2);
sendto_umode_global(UMODE_OPER, "%s", buf);
} else {
/* A link attempt failed. Only send this to local opers (can be noisy every xx seconds). */
snprintf(buf, sizeof(buf), "Unable to link with server %s: %s",
get_client_name(serv, FALSE), buf2);
sendto_umode(UMODE_OPER, "%s", buf);
}
/* Always log! */
ircd_log(LOG_ERROR, "%s", buf);
}
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