/**
* Destroy user or service client.
*/
static void
Destroy_UserOrService(CLIENT *Client, const char *Txt, const char *FwdMsg, bool SendQuit)
{
if(Client->conn_id != NONE) {
/* Local (directly connected) client */
Log(LOG_NOTICE,
"%s \"%s\" unregistered (connection %d): %s.",
Client_TypeText(Client), Client_Mask(Client),
Client->conn_id, Txt);
Log_ServerNotice('c', "Client exiting: %s (%s@%s) [%s]",
Client_ID(Client), Client_User(Client),
Client_Hostname(Client), Txt);
if (SendQuit) {
/* Inforam all the other servers */
if (FwdMsg)
IRC_WriteStrServersPrefix(NULL,
Client, "QUIT :%s", FwdMsg );
else
IRC_WriteStrServersPrefix(NULL,
Client, "QUIT :");
}
} else {
/* Remote client */
LogDebug("%s \"%s\" unregistered: %s.",
Client_TypeText(Client), Client_Mask(Client), Txt);
if(SendQuit) {
/* Inform all the other servers, but the ones in the
* direction we got the QUIT from */
if(FwdMsg)
IRC_WriteStrServersPrefix(Client_NextHop(Client),
Client, "QUIT :%s", FwdMsg );
else
IRC_WriteStrServersPrefix(Client_NextHop(Client),
Client, "QUIT :" );
}
}
/* Unregister client from channels */
Channel_Quit(Client, FwdMsg ? FwdMsg : Client->id);
/* Register client in My_Whowas structure */
Client_RegisterWhowas(Client);
} /* Destroy_UserOrService */
/**
* Check if a list limit is reached and inform client accordingly.
*
* @param From The client.
* @param Count Reply item count.
* @param Limit Reply limit.
* @param Name Name of the list.
* @return true if list limit has been reached; false otherwise.
*/
GLOBAL bool
IRC_CheckListTooBig(CLIENT *From, const int Count, const int Limit,
const char *Name)
{
assert(From != NULL);
assert(Count >= 0);
assert(Limit > 0);
assert(Name != NULL);
if (Count < Limit)
return false;
(void)IRC_WriteStrClient(From,
"NOTICE %s :%s list limit (%d) reached!",
Client_ID(From), Name, Limit);
IRC_SetPenalty(From, 2);
return true;
}
/**
* Handler for the IRC "KILL" command.
*
* This function implements the IRC command "KILL" which is used to selectively
* disconnect clients. It can be used by IRC operators and servers, for example
* to "solve" nick collisions after netsplits. See RFC 2812 section 3.7.1.
*
* Please note that this function is also called internally, without a real
* KILL command being received over the network! Client is Client_ThisServer()
* in this case, and the prefix in Req is NULL.
*
* @param Client The client from which this command has been received or
* Client_ThisServer() when generated interanlly.
* @param Req Request structure with prefix and all parameters.
* @return CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_KILL(CLIENT *Client, REQUEST *Req)
{
CLIENT *prefix;
char reason[COMMAND_LEN];
assert (Client != NULL);
assert (Req != NULL);
if (Client_Type(Client) != CLIENT_SERVER && !Op_Check(Client, Req))
return Op_NoPrivileges(Client, Req);
/* Get prefix (origin); use the client if no prefix is given. */
if (Req->prefix)
prefix = Client_Search(Req->prefix);
else
prefix = Client;
/* Log a warning message and use this server as origin when the
* prefix (origin) is invalid. And this is the reason why we don't
* use the _IRC_GET_SENDER_OR_RETURN_ macro above! */
if (!prefix) {
Log(LOG_WARNING, "Got KILL with invalid prefix: \"%s\"!",
Req->prefix );
prefix = Client_ThisServer();
}
if (Client != Client_ThisServer())
Log(LOG_NOTICE|LOG_snotice,
"Got KILL command from \"%s\" for \"%s\": \"%s\".",
Client_Mask(prefix), Req->argv[0], Req->argv[1]);
/* Build reason string: Prefix the "reason" if the originator is a
* regular user, so users can't spoof KILLs of servers. */
if (Client_Type(Client) == CLIENT_USER)
snprintf(reason, sizeof(reason), "KILLed by %s: %s",
Client_ID(Client), Req->argv[1]);
else
strlcpy(reason, Req->argv[1], sizeof(reason));
return IRC_KillClient(Client, prefix, Req->argv[0], reason);
}
/**
* Forward JOIN command to a specific server
*
* This function differentiates between servers using RFC 2813 mode that
* support the JOIN command with appended ASCII 7 character and channel
* modes, and servers using RFC 1459 protocol which require separate JOIN
* and MODE commands.
*
* @param To Forward JOIN (and MODE) command to this peer server
* @param Prefix Client used to prefix the genrated commands
* @param Data Parameters of JOIN command to forward, probably
* containing channel modes separated by ASCII 7.
*/
static void
cb_join_forward(CLIENT *To, CLIENT *Prefix, void *Data)
{
CONN_ID conn;
char str[COMMAND_LEN], *ptr = NULL;
strlcpy(str, (char *)Data, sizeof(str));
conn = Client_Conn(To);
if (Conn_Options(conn) & CONN_RFC1459) {
/* RFC 1459 compatibility mode, appended modes are NOT
* supported, so strip them off! */
ptr = strchr(str, 0x7);
if (ptr)
*ptr++ = '\0';
}
IRC_WriteStrClientPrefix(To, Prefix, "JOIN %s", str);
if (ptr && *ptr)
IRC_WriteStrClientPrefix(To, Prefix, "MODE %s +%s %s", str, ptr,
Client_ID(Prefix));
} /* cb_join_forward */
/**
* Search first CLIENT structure matching a given mask of a server.
*
* The order of servers is arbitrary, but this function makes sure that the
* local server is always returned if the mask matches it.
*
* @return Pointer to CLIENT structure or NULL if no server could be found.
*/
GLOBAL CLIENT *
Client_SearchServer(const char *Mask)
{
CLIENT *c;
assert(Mask != NULL);
/* First check if mask matches the local server */
if (MatchCaseInsensitive(Mask, Client_ID(Client_ThisServer())))
return Client_ThisServer();
c = My_Clients;
while (c) {
if (Client_Type(c) == CLIENT_SERVER) {
/* This is a server: check if Mask matches */
if (MatchCaseInsensitive(Mask, c->id))
return c;
}
c = (CLIENT *)c->next;
}
return NULL;
}
/**
* Kick user from Channel
*/
GLOBAL void
Channel_Kick(CLIENT *Peer, CLIENT *Target, CLIENT *Origin, const char *Name,
const char *Reason )
{
CHANNEL *chan;
bool can_kick = false;
assert(Peer != NULL);
assert(Target != NULL);
assert(Origin != NULL);
assert(Name != NULL);
assert(Reason != NULL);
/* Check that channel exists */
chan = Channel_Search( Name );
if (!chan) {
IRC_WriteErrClient(Origin, ERR_NOSUCHCHANNEL_MSG,
Client_ID(Origin), Name);
return;
}
if (Client_Type(Peer) != CLIENT_SERVER &&
Client_Type(Origin) != CLIENT_SERVICE) {
/* Check that user is on the specified channel */
if (!Channel_IsMemberOf(chan, Origin)) {
IRC_WriteErrClient(Origin, ERR_NOTONCHANNEL_MSG,
Client_ID(Origin), Name);
return;
}
}
/* Check that the client to be kicked is on the specified channel */
if (!Channel_IsMemberOf(chan, Target)) {
IRC_WriteErrClient(Origin, ERR_USERNOTINCHANNEL_MSG,
Client_ID(Origin), Client_ID(Target), Name );
return;
}
if(Client_Type(Peer) == CLIENT_USER) {
/* Channel mode 'Q' and user mode 'q' on target: nobody but
* IRC Operators and servers can kick the target user */
if ((Channel_HasMode(chan, 'Q')
|| Client_HasMode(Target, 'q')
|| Client_Type(Target) == CLIENT_SERVICE)
&& !Client_HasMode(Origin, 'o')) {
IRC_WriteErrClient(Origin, ERR_KICKDENY_MSG,
Client_ID(Origin), Name,
Client_ID(Target));
return;
}
/* Check if client has the rights to kick target */
/* Owner can kick everyone */
if (Channel_UserHasMode(chan, Peer, 'q'))
can_kick = true;
/* Admin can't kick owner */
else if (Channel_UserHasMode(chan, Peer, 'a') &&
!Channel_UserHasMode(chan, Target, 'q'))
can_kick = true;
/* Op can't kick owner | admin */
else if (Channel_UserHasMode(chan, Peer, 'o') &&
!Channel_UserHasMode(chan, Target, 'q') &&
!Channel_UserHasMode(chan, Target, 'a'))
can_kick = true;
/* Half Op can't kick owner | admin | op */
else if (Channel_UserHasMode(chan, Peer, 'h') &&
!Channel_UserHasMode(chan, Target, 'q') &&
!Channel_UserHasMode(chan, Target, 'a') &&
!Channel_UserHasMode(chan, Target, 'o'))
can_kick = true;
/* IRC operators & IRCd with OperCanMode enabled
* can kick anyways regardless of privilege */
else if(Client_HasMode(Origin, 'o') && Conf_OperCanMode)
can_kick = true;
if(!can_kick) {
IRC_WriteErrClient(Origin, ERR_CHANOPPRIVTOOLOW_MSG,
Client_ID(Origin), Name);
return;
}
}
/* Kick Client from channel */
Remove_Client( REMOVE_KICK, chan, Target, Origin, Reason, true);
} /* Channel_Kick */
static bool
Remove_Client( int Type, CHANNEL *Chan, CLIENT *Client, CLIENT *Origin, const char *Reason, bool InformServer )
{
CL2CHAN *cl2chan, *last_cl2chan;
CHANNEL *c;
assert( Chan != NULL );
assert( Client != NULL );
assert( Origin != NULL );
assert( Reason != NULL );
/* Do not inform other servers if the channel is local to this server,
* regardless of what the caller requested! */
if(InformServer)
InformServer = !Channel_IsLocal(Chan);
last_cl2chan = NULL;
cl2chan = My_Cl2Chan;
while( cl2chan )
{
if(( cl2chan->channel == Chan ) && ( cl2chan->client == Client )) break;
last_cl2chan = cl2chan;
cl2chan = cl2chan->next;
}
if( ! cl2chan ) return false;
c = cl2chan->channel;
assert( c != NULL );
/* maintain cl2chan list */
if( last_cl2chan ) last_cl2chan->next = cl2chan->next;
else My_Cl2Chan = cl2chan->next;
free( cl2chan );
switch( Type )
{
case REMOVE_QUIT:
/* QUIT: other servers have already been notified,
* see Client_Destroy(); so only inform other clients
* in same channel. */
assert( InformServer == false );
LogDebug("User \"%s\" left channel \"%s\" (%s).",
Client_Mask( Client ), c->name, Reason );
break;
case REMOVE_KICK:
/* User was KICKed: inform other servers (public
* channels) and all users in the channel */
if( InformServer )
IRC_WriteStrServersPrefix( Client_NextHop( Origin ),
Origin, "KICK %s %s :%s", c->name, Client_ID( Client ), Reason);
IRC_WriteStrChannelPrefix(Client, c, Origin, false, "KICK %s %s :%s",
c->name, Client_ID( Client ), Reason );
if ((Client_Conn(Client) > NONE) &&
(Client_Type(Client) == CLIENT_USER))
{
IRC_WriteStrClientPrefix(Client, Origin, "KICK %s %s :%s",
c->name, Client_ID( Client ), Reason);
}
LogDebug("User \"%s\" has been kicked off \"%s\" by \"%s\": %s.",
Client_Mask( Client ), c->name, Client_ID(Origin), Reason);
break;
default: /* PART */
if (Conf_MorePrivacy)
Reason = "";
if (InformServer)
IRC_WriteStrServersPrefix(Origin, Client, "PART %s :%s", c->name, Reason);
IRC_WriteStrChannelPrefix(Origin, c, Client, false, "PART %s :%s",
c->name, Reason);
if ((Client_Conn(Origin) > NONE) &&
(Client_Type(Origin) == CLIENT_USER))
{
IRC_WriteStrClientPrefix( Origin, Client, "PART %s :%s", c->name, Reason);
LogDebug("User \"%s\" left channel \"%s\" (%s).",
Client_Mask(Client), c->name, Reason);
}
}
/* When channel is empty and is not pre-defined, delete */
if( ! Channel_HasMode( Chan, 'P' ))
{
if( ! Get_First_Cl2Chan( NULL, Chan )) Delete_Channel( Chan );
}
return true;
} /* Remove_Client */
/**
* Get pointer to a static string representing the connection "options".
*
* @param Idx Connection index.
* @return Pointer to static (global) string buffer.
*/
static char *
#if defined(SSL_SUPPORT) || defined(ZLIB)
Option_String(CONN_ID Idx)
{
static char option_txt[8];
UINT16 options;
assert(Idx != NONE);
options = Conn_Options(Idx);
strcpy(option_txt, "F"); /* No idea what this means, but the
* original ircd sends it ... */
#ifdef SSL_SUPPORT
if(options & CONN_SSL) /* SSL encrypted link */
strlcat(option_txt, "s", sizeof(option_txt));
#endif
#ifdef ZLIB
if(options & CONN_ZIP) /* zlib compression enabled */
strlcat(option_txt, "z", sizeof(option_txt));
#endif
return option_txt;
#else
Option_String(UNUSED CONN_ID Idx)
{
return "";
#endif
} /* Option_String */
/**
* Send a message to target(s).
*
* This function is used by IRC_{PRIVMSG|NOTICE|SQUERY} to actualy
* send the message(s).
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @param ForceType Required type of the destination of the message(s).
* @param SendErrors Whether to report errors back to the client or not.
* @return CONNECTED or DISCONNECTED.
*/
static bool
Send_Message(CLIENT * Client, REQUEST * Req, int ForceType, bool SendErrors)
{
CLIENT *cl, *from;
CL2CHAN *cl2chan;
CHANNEL *chan;
char *currentTarget = Req->argv[0];
char *strtok_last = NULL;
char *message = NULL;
char *targets[MAX_HNDL_TARGETS];
int i, target_nr = 0;
assert(Client != NULL);
assert(Req != NULL);
if (Req->argc == 0) {
if (!SendErrors)
return CONNECTED;
return IRC_WriteErrClient(Client, ERR_NORECIPIENT_MSG,
Client_ID(Client), Req->command);
}
if (Req->argc == 1) {
if (!SendErrors)
return CONNECTED;
return IRC_WriteErrClient(Client, ERR_NOTEXTTOSEND_MSG,
Client_ID(Client));
}
if (Req->argc > 2) {
if (!SendErrors)
return CONNECTED;
return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
}
if (Client_Type(Client) == CLIENT_SERVER && Req->prefix)
from = Client_Search(Req->prefix);
else
from = Client;
if (!from)
return IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
Client_ID(Client), Req->prefix);
#ifdef ICONV
if (Client_Conn(Client) > NONE)
message = Conn_EncodingFrom(Client_Conn(Client), Req->argv[1]);
else
#endif
message = Req->argv[1];
/* handle msgtarget = msgto *("," msgto) */
currentTarget = strtok_r(currentTarget, ",", &strtok_last);
ngt_UpperStr(Req->command);
/* Please note that "currentTarget" is NULL when the target contains
* the separator character only, e. g. "," or ",,,," etc.! */
while (currentTarget) {
/* Make sure that there hasn't been such a target already: */
targets[target_nr++] = currentTarget;
for(i = 0; i < target_nr - 1; i++) {
if (strcasecmp(currentTarget, targets[i]) == 0)
goto send_next_target;
}
/* Check for and handle valid <msgto> of form:
* RFC 2812 2.3.1:
* msgto = channel / ( user [ "%" host ] "@" servername )
* msgto =/ ( user "%" host ) / targetmask
* msgto =/ nickname / ( nickname "!" user "@" host )
*/
if (strchr(currentTarget, '!') == NULL)
/* nickname */
cl = Client_Search(currentTarget);
else
cl = NULL;
if (cl == NULL) {
/* If currentTarget isn't a nickname check for:
* user ["%" host] "@" servername
* user "%" host
* nickname "!" user "@" host
*/
char target[COMMAND_LEN];
char * nick = NULL;
char * user = NULL;
char * host = NULL;
char * server = NULL;
strlcpy(target, currentTarget, COMMAND_LEN);
server = strchr(target, '@');
if (server) {
*server = '\0';
server++;
}
host = strchr(target, '%');
if (host) {
*host = '\0';
host++;
}
user = strchr(target, '!');
if (user) {
/* msgto form: nick!user@host */
*user = '******';
user++;
nick = target;
host = server; /* not "@server" but "@host" */
} else {
user = target;
}
for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
if (Client_Type(cl) != CLIENT_USER &&
Client_Type(cl) != CLIENT_SERVICE)
continue;
if (nick != NULL && host != NULL) {
if (strcasecmp(nick, Client_ID(cl)) == 0 &&
strcasecmp(user, Client_User(cl)) == 0 &&
strcasecmp(host, Client_HostnameDisplayed(cl)) == 0)
break;
else
continue;
}
if (strcasecmp(user, Client_User(cl)) != 0)
continue;
if (host != NULL && strcasecmp(host,
Client_HostnameDisplayed(cl)) != 0)
continue;
if (server != NULL && strcasecmp(server,
Client_ID(Client_Introducer(cl))) != 0)
continue;
break;
}
}
if (cl) {
/* Target is a user, enforce type */
#ifndef STRICT_RFC
if (Client_Type(cl) != ForceType &&
!(ForceType == CLIENT_USER &&
(Client_Type(cl) == CLIENT_USER ||
Client_Type(cl) == CLIENT_SERVICE))) {
#else
if (Client_Type(cl) != ForceType) {
#endif
if (SendErrors && !IRC_WriteErrClient(
from, ERR_NOSUCHNICK_MSG,Client_ID(from),
currentTarget))
return DISCONNECTED;
goto send_next_target;
}
#ifndef STRICT_RFC
if (ForceType == CLIENT_SERVICE &&
(Conn_Options(Client_Conn(Client_NextHop(cl)))
& CONN_RFC1459)) {
/* SQUERY command but RFC 1459 link: convert
* request to PRIVMSG command */
Req->command = "PRIVMSG";
}
#endif
if (Client_HasMode(cl, 'b') &&
!Client_HasMode(from, 'R') &&
!Client_HasMode(from, 'o') &&
!(Client_Type(from) == CLIENT_SERVER) &&
!(Client_Type(from) == CLIENT_SERVICE)) {
if (SendErrors && !IRC_WriteErrClient(from,
ERR_NONONREG_MSG,
Client_ID(from), Client_ID(cl)))
return DISCONNECTED;
goto send_next_target;
}
if (Client_HasMode(cl, 'C') &&
!Client_HasMode(from, 'o') &&
!(Client_Type(from) == CLIENT_SERVER) &&
!(Client_Type(from) == CLIENT_SERVICE)) {
cl2chan = Channel_FirstChannelOf(cl);
while (cl2chan) {
chan = Channel_GetChannel(cl2chan);
if (Channel_IsMemberOf(chan, from))
break;
cl2chan = Channel_NextChannelOf(cl, cl2chan);
}
if (!cl2chan) {
if (SendErrors && !IRC_WriteErrClient(
from, ERR_NOTONSAMECHANNEL_MSG,
Client_ID(from), Client_ID(cl)))
return DISCONNECTED;
goto send_next_target;
}
}
if (SendErrors && (Client_Type(Client) != CLIENT_SERVER)
&& Client_HasMode(cl, 'a')) {
/* Target is away */
if (!IRC_WriteStrClient(from, RPL_AWAY_MSG,
Client_ID(from),
Client_ID(cl),
Client_Away(cl)))
return DISCONNECTED;
}
if (Client_Conn(from) > NONE) {
Conn_UpdateIdle(Client_Conn(from));
}
if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
Req->command, Client_ID(cl),
message))
return DISCONNECTED;
} else if (ForceType != CLIENT_SERVICE
&& (chan = Channel_Search(currentTarget))) {
/* Target is a channel */
if (!Channel_Write(chan, from, Client, Req->command,
SendErrors, message))
return DISCONNECTED;
} else if (ForceType != CLIENT_SERVICE
&& strchr("$#", currentTarget[0])
&& strchr(currentTarget, '.')) {
/* $#: server/host mask, RFC 2812, sec. 3.3.1 */
if (!Send_Message_Mask(from, Req->command, currentTarget,
message, SendErrors))
return DISCONNECTED;
} else {
if (!SendErrors)
return CONNECTED;
if (!IRC_WriteErrClient(from, ERR_NOSUCHNICK_MSG,
Client_ID(from), currentTarget))
return DISCONNECTED;
}
send_next_target:
currentTarget = strtok_r(NULL, ",", &strtok_last);
if (!currentTarget)
break;
Conn_SetPenalty(Client_Conn(Client), 1);
if (target_nr >= MAX_HNDL_TARGETS) {
/* Too many targets given! */
return IRC_WriteErrClient(Client,
ERR_TOOMANYTARGETS_MSG,
currentTarget);
}
}
return CONNECTED;
} /* Send_Message */
/**
* Send a message to "target mask" target(s).
*
* See RFC 2812, sec. 3.3.1 for details.
*
* @param from The client from which this command has been received.
* @param command The command to use (PRIVMSG, NOTICE, ...).
* @param targetMask The "target mask" (will be verified by this function).
* @param message The message to send.
* @param SendErrors Whether to report errors back to the client or not.
* @return CONNECTED or DISCONNECTED.
*/
static bool
Send_Message_Mask(CLIENT * from, char * command, char * targetMask,
char * message, bool SendErrors)
{
CLIENT *cl;
bool client_match;
char *mask = targetMask + 1;
const char *check_wildcards;
cl = NULL;
if (!Client_HasMode(from, 'o')) {
if (!SendErrors)
return true;
return IRC_WriteErrClient(from, ERR_NOPRIVILEGES_MSG,
Client_ID(from));
}
/*
* RFC 2812, sec. 3.3.1 requires that targetMask have at least one
* dot (".") and no wildcards ("*", "?") following the last one.
*/
check_wildcards = strrchr(targetMask, '.');
if (!check_wildcards || check_wildcards[strcspn(check_wildcards, "*?")]) {
if (!SendErrors)
return true;
return IRC_WriteErrClient(from, ERR_WILDTOPLEVEL_MSG,
targetMask);
}
if (targetMask[0] == '#') {
/* #: hostmask, see RFC 2812, sec. 3.3.1 */
for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
if (Client_Type(cl) != CLIENT_USER)
continue;
client_match = MatchCaseInsensitive(mask, Client_Hostname(cl));
if (client_match)
if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
command, Client_ID(cl), message))
return false;
}
} else {
/* $: server mask, see RFC 2812, sec. 3.3.1 */
assert(targetMask[0] == '$');
for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
if (Client_Type(cl) != CLIENT_USER)
continue;
client_match = MatchCaseInsensitive(mask,
Client_ID(Client_Introducer(cl)));
if (client_match)
if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
command, Client_ID(cl), message))
return false;
}
}
return CONNECTED;
} /* Send_Message_Mask */
/**
* Handler for the IRC "TOPIC" command.
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @return CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_TOPIC( CLIENT *Client, REQUEST *Req )
{
CHANNEL *chan;
CLIENT *from;
char *topic;
bool r, topic_power;
assert( Client != NULL );
assert( Req != NULL );
_IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
chan = Channel_Search(Req->argv[0]);
if (!chan)
return IRC_WriteErrClient(from, ERR_NOSUCHCHANNEL_MSG,
Client_ID(from), Req->argv[0]);
/* Only remote servers and channel members are allowed to change the
* channel topic, and IRC operators when the Conf_OperCanMode option
* is set in the server configuration. */
if (Client_Type(Client) != CLIENT_SERVER) {
topic_power = Client_HasMode(from, 'o');
if (!Channel_IsMemberOf(chan, from)
&& !(Conf_OperCanMode && topic_power))
return IRC_WriteErrClient(from, ERR_NOTONCHANNEL_MSG,
Client_ID(from), Req->argv[0]);
} else
topic_power = true;
if (Req->argc == 1) {
/* Request actual topic */
topic = Channel_Topic(chan);
if (*topic) {
r = IRC_WriteStrClient(from, RPL_TOPIC_MSG,
Client_ID(Client),
Channel_Name(chan), topic);
#ifndef STRICT_RFC
if (!r)
return r;
r = IRC_WriteStrClient(from, RPL_TOPICSETBY_MSG,
Client_ID(Client),
Channel_Name(chan),
Channel_TopicWho(chan),
Channel_TopicTime(chan));
#endif
return r;
}
else
return IRC_WriteStrClient(from, RPL_NOTOPIC_MSG,
Client_ID(from),
Channel_Name(chan));
}
if (Channel_HasMode(chan, 't')) {
/* Topic Lock. Is the user a channel op or IRC operator? */
if(!topic_power &&
!Channel_UserHasMode(chan, from, 'h') &&
!Channel_UserHasMode(chan, from, 'o') &&
!Channel_UserHasMode(chan, from, 'a') &&
!Channel_UserHasMode(chan, from, 'q'))
return IRC_WriteErrClient(from, ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(from),
Channel_Name(chan));
}
/* Set new topic */
Channel_SetTopic(chan, from, Req->argv[1]);
LogDebug("%s \"%s\" set topic on \"%s\": %s",
Client_TypeText(from), Client_Mask(from), Channel_Name(chan),
Req->argv[1][0] ? Req->argv[1] : "<none>");
if (Conf_OperServerMode)
from = Client_ThisServer();
/* Update channel and forward new topic to other servers */
if (!Channel_IsLocal(chan))
IRC_WriteStrServersPrefix(Client, from, "TOPIC %s :%s",
Req->argv[0], Req->argv[1]);
IRC_WriteStrChannelPrefix(Client, chan, from, false, "TOPIC %s :%s",
Req->argv[0], Req->argv[1]);
if (Client_Type(Client) == CLIENT_USER)
return IRC_WriteStrClientPrefix(Client, Client, "TOPIC %s :%s",
Req->argv[0], Req->argv[1]);
else
return CONNECTED;
} /* IRC_TOPIC */
/**
* Handler for the IRC+ "CHANINFO" command.
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @return CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
{
char modes_add[COMMAND_LEN], l[16];
CLIENT *from;
CHANNEL *chan;
int arg_topic;
assert( Client != NULL );
assert( Req != NULL );
/* Bad number of parameters? */
if (Req->argc < 2 || Req->argc == 4 || Req->argc > 5)
return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
/* Compatibility kludge */
if (Req->argc == 5)
arg_topic = 4;
else if(Req->argc == 3)
arg_topic = 2;
else
arg_topic = -1;
_IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
/* Search or create channel */
chan = Channel_Search( Req->argv[0] );
if (!chan)
chan = Channel_Create( Req->argv[0] );
if (!chan)
return CONNECTED;
if (Req->argv[1][0] == '+') {
if (!*Channel_Modes(chan)) {
/* OK, this channel doesn't have modes yet,
* set the received ones: */
Channel_SetModes(chan, &Req->argv[1][1]);
if(Req->argc == 5) {
if(Channel_HasMode(chan, 'k'))
Channel_SetKey(chan, Req->argv[2]);
if(Channel_HasMode(chan, 'l'))
Channel_SetMaxUsers(chan, atol(Req->argv[3]));
} else {
/* Delete modes which we never want to inherit */
Channel_ModeDel(chan, 'l');
Channel_ModeDel(chan, 'k');
}
strcpy(modes_add, "");
if (Channel_HasMode(chan, 'l')) {
snprintf(l, sizeof(l), " %lu",
Channel_MaxUsers(chan));
strlcat(modes_add, l, sizeof(modes_add));
}
if (Channel_HasMode(chan, 'k')) {
strlcat(modes_add, " ", sizeof(modes_add));
strlcat(modes_add, Channel_Key(chan),
sizeof(modes_add));
}
/* Inform members of this channel */
IRC_WriteStrChannelPrefix(Client, chan, from, false,
"MODE %s +%s%s", Req->argv[0],
Channel_Modes(chan), modes_add);
}
}
else
Log(LOG_WARNING, "CHANINFO: invalid MODE format ignored!");
if (arg_topic > 0) {
/* We got a topic */
if (!*Channel_Topic(chan) && Req->argv[arg_topic][0]) {
/* OK, there is no topic jet */
Channel_SetTopic(chan, Client, Req->argv[arg_topic]);
IRC_WriteStrChannelPrefix(Client, chan, from, false,
"TOPIC %s :%s", Req->argv[0], Channel_Topic(chan));
}
}
/* Forward CHANINFO to other servers */
if (Req->argc == 5)
IRC_WriteStrServersPrefixFlag(Client, from, 'C',
"CHANINFO %s %s %s %s :%s",
Req->argv[0], Req->argv[1],
Req->argv[2], Req->argv[3],
Req->argv[4]);
else if (Req->argc == 3)
IRC_WriteStrServersPrefixFlag(Client, from, 'C',
"CHANINFO %s %s :%s",
Req->argv[0], Req->argv[1],
Req->argv[2]);
else
IRC_WriteStrServersPrefixFlag(Client, from, 'C',
"CHANINFO %s %s",
Req->argv[0], Req->argv[1]);
return CONNECTED;
} /* IRC_CHANINFO */
/**
* Handle client mode requests
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @param Origin The originator of the MODE command (prefix).
* @param Target The target (client) of this MODE command.
* @return CONNECTED or DISCONNECTED.
*/
static bool
Client_Mode( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CLIENT *Target )
{
char the_modes[COMMAND_LEN], x[2], *mode_ptr;
bool ok, set;
bool send_RPL_HOSTHIDDEN_MSG = false;
int mode_arg;
size_t len;
/* Is the client allowed to request or change the modes? */
if (Client_Type(Client) == CLIENT_USER) {
/* Users are only allowed to manipulate their own modes! */
if (Target != Client)
return IRC_WriteErrClient(Client,
ERR_USERSDONTMATCH_MSG,
Client_ID(Client));
}
/* Mode request: let's answer it :-) */
if (Req->argc == 1)
return IRC_WriteStrClient(Origin, RPL_UMODEIS_MSG,
Client_ID(Target),
Client_Modes(Target));
mode_arg = 1;
mode_ptr = Req->argv[mode_arg];
/* Initial state: set or unset modes? */
if (*mode_ptr == '+') {
set = true;
strcpy(the_modes, "+");
} else if (*mode_ptr == '-') {
set = false;
strcpy(the_modes, "-");
} else
return IRC_WriteErrClient(Origin, ERR_UMODEUNKNOWNFLAG_MSG,
Client_ID(Origin));
x[1] = '\0';
ok = CONNECTED;
while (mode_ptr) {
mode_ptr++;
if (!*mode_ptr) {
/* Try next argument if there's any */
mode_arg++;
if (mode_arg < Req->argc)
mode_ptr = Req->argv[mode_arg];
else
break;
}
switch(*mode_ptr) {
case '+':
case '-':
if ((*mode_ptr == '+' && !set)
|| (*mode_ptr == '-' && set)) {
/* Action modifier ("+"/"-") must be changed */
len = strlen(the_modes) - 1;
if (the_modes[len] == '+'
|| the_modes[len] == '-') {
/* Last character in the "result
* string" was an "action", so just
* overwrite it with the new action */
the_modes[len] = *mode_ptr;
} else {
/* Append new modifier character to
* the resulting mode string */
x[0] = *mode_ptr;
strlcat(the_modes, x,
sizeof(the_modes));
}
if (*mode_ptr == '+')
set = true;
else
set = false;
}
continue;
}
/* Validate modes */
x[0] = '\0';
switch (*mode_ptr) {
case 'b': /* Block private msgs */
case 'C': /* Only messages from clients sharing a channel */
case 'i': /* Invisible */
case 'I': /* Hide channel list from WHOIS */
case 's': /* Server messages */
case 'w': /* Wallops messages */
x[0] = *mode_ptr;
break;
case 'a': /* Away */
if (Client_Type(Client) == CLIENT_SERVER) {
x[0] = 'a';
Client_SetAway(Origin, DEFAULT_AWAY_MSG);
} else
ok = IRC_WriteErrClient(Origin,
ERR_NOPRIVILEGES_MSG,
Client_ID(Origin));
break;
case 'B': /* Bot */
if (Client_HasMode(Client, 'r'))
ok = IRC_WriteErrClient(Origin,
ERR_RESTRICTED_MSG,
Client_ID(Origin));
else
x[0] = 'B';
break;
case 'c': /* Receive connect notices */
case 'q': /* KICK-protected user */
case 'F': /* disable flood protection */
/* (only settable by IRC operators!) */
if (!set || Client_Type(Client) == CLIENT_SERVER
|| Client_HasMode(Origin, 'o'))
x[0] = *mode_ptr;
else
ok = IRC_WriteErrClient(Origin,
ERR_NOPRIVILEGES_MSG,
Client_ID(Origin));
break;
case 'o': /* IRC operator (only unsettable!) */
if (!set || Client_Type(Client) == CLIENT_SERVER) {
x[0] = 'o';
} else
ok = IRC_WriteErrClient(Origin,
ERR_NOPRIVILEGES_MSG,
Client_ID(Origin));
break;
case 'r': /* Restricted (only settable) */
if (set || Client_Type(Client) == CLIENT_SERVER)
x[0] = 'r';
else
ok = IRC_WriteErrClient(Origin,
ERR_RESTRICTED_MSG,
Client_ID(Origin));
break;
case 'R': /* Registered (not [un]settable by clients) */
if (Client_Type(Client) == CLIENT_SERVER)
x[0] = 'R';
else
ok = IRC_WriteErrClient(Origin,
ERR_NICKREGISTER_MSG,
Client_ID(Origin));
break;
case 'x': /* Cloak hostname */
if (Client_HasMode(Client, 'r'))
ok = IRC_WriteErrClient(Origin,
ERR_RESTRICTED_MSG,
Client_ID(Origin));
else if (!set || Conf_CloakHostModeX[0]
|| Client_Type(Client) == CLIENT_SERVER
|| Client_HasMode(Origin, 'o')) {
x[0] = 'x';
send_RPL_HOSTHIDDEN_MSG = true;
} else
ok = IRC_WriteErrClient(Origin,
ERR_NOPRIVILEGES_MSG,
Client_ID(Origin));
break;
default:
if (Client_Type(Client) != CLIENT_SERVER) {
Log(LOG_DEBUG,
"Unknown mode \"%c%c\" from \"%s\"!?",
set ? '+' : '-', *mode_ptr,
Client_ID(Origin));
ok = IRC_WriteErrClient(Origin,
ERR_UMODEUNKNOWNFLAG2_MSG,
Client_ID(Origin),
set ? '+' : '-',
*mode_ptr);
x[0] = '\0';
} else {
Log(LOG_DEBUG,
"Handling unknown mode \"%c%c\" from \"%s\" for \"%s\" ...",
set ? '+' : '-', *mode_ptr,
Client_ID(Origin), Client_ID(Target));
x[0] = *mode_ptr;
}
}
if (!ok)
break;
/* Is there a valid mode change? */
if (!x[0])
continue;
if (set) {
if (Client_ModeAdd(Target, x[0]))
strlcat(the_modes, x, sizeof(the_modes));
} else {
if (Client_ModeDel(Target, x[0]))
strlcat(the_modes, x, sizeof(the_modes));
}
}
/* Are there changed modes? */
if (the_modes[1]) {
/* Remove needless action modifier characters */
len = strlen(the_modes) - 1;
if (the_modes[len] == '+' || the_modes[len] == '-')
the_modes[len] = '\0';
if (Client_Type(Client) == CLIENT_SERVER) {
/* Forward modes to other servers */
if (Client_Conn(Target) != NONE) {
/* Remote server (service?) changed modes
* for one of our clients. Inform it! */
IRC_WriteStrClientPrefix(Target, Origin,
"MODE %s :%s",
Client_ID(Target),
the_modes);
}
IRC_WriteStrServersPrefix(Client, Origin,
"MODE %s :%s",
Client_ID(Target),
the_modes);
} else {
/* Send reply to client and inform other servers */
ok = IRC_WriteStrClientPrefix(Client, Origin,
"MODE %s :%s",
Client_ID(Target),
the_modes);
IRC_WriteStrServersPrefix(Client, Origin,
"MODE %s :%s",
Client_ID(Target),
the_modes);
}
if (send_RPL_HOSTHIDDEN_MSG && Client_Conn(Target) > NONE) {
/* A new (cloaked) hostname must be announced */
IRC_WriteStrClientPrefix(Target, Origin,
RPL_HOSTHIDDEN_MSG,
Client_ID(Target),
Client_HostnameDisplayed(Target));
}
LogDebug("%s \"%s\": Mode change, now \"%s\".",
Client_TypeText(Target), Client_Mask(Target),
Client_Modes(Target));
}
return ok;
} /* Client_Mode */
/**
* Handler for the IRC command "INVITE".
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @return CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_INVITE(CLIENT *Client, REQUEST *Req)
{
CHANNEL *chan;
CLIENT *target, *from;
const char *colon_if_necessary;
bool remember = false;
assert( Client != NULL );
assert( Req != NULL );
_IRC_ARGC_EQ_OR_RETURN_(Client, Req, 2)
_IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
/* Search user */
target = Client_Search(Req->argv[0]);
if (!target || (Client_Type(target) != CLIENT_USER))
return IRC_WriteStrClient(from, ERR_NOSUCHNICK_MSG,
Client_ID(Client), Req->argv[0]);
chan = Channel_Search(Req->argv[1]);
if (chan) {
/* Channel exists. Is the user a valid member of the channel? */
if (!Channel_IsMemberOf(chan, from))
return IRC_WriteStrClient(from, ERR_NOTONCHANNEL_MSG, Client_ID(Client), Req->argv[1]);
/* Is the channel "invite-disallow"? */
if (strchr(Channel_Modes(chan), 'V'))
return IRC_WriteStrClient(from, ERR_NOINVITE_MSG,
Client_ID(from), Channel_Name(chan));
/* Is the channel "invite-only"? */
if (strchr(Channel_Modes(chan), 'i')) {
/* Yes. The user must be channel owner/admin/operator/halfop! */
if (!strchr(Channel_UserModes(chan, from), 'q') &&
!strchr(Channel_UserModes(chan, from), 'a') &&
!strchr(Channel_UserModes(chan, from), 'o') &&
!strchr(Channel_UserModes(chan, from), 'h'))
return IRC_WriteStrClient(from, ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(from), Channel_Name(chan));
remember = true;
}
/* Is the target user already member of the channel? */
if (Channel_IsMemberOf(chan, target))
return IRC_WriteStrClient(from, ERR_USERONCHANNEL_MSG,
Client_ID(from), Req->argv[0], Req->argv[1]);
/* If the target user is banned on that channel: remember invite */
if (Lists_Check(Channel_GetListBans(chan), target))
remember = true;
if (remember) {
/* We must remember this invite */
if (!Channel_AddInvite(chan, Client_Mask(target), true))
return CONNECTED;
}
}
LogDebug("User \"%s\" invites \"%s\" to \"%s\" ...", Client_Mask(from),
Req->argv[0], Req->argv[1]);
/*
* RFC 2812 says:
* 'There is no requirement that the channel [..] must exist or be a valid channel'
* The problem with this is that this allows the "channel" to contain spaces,
* in which case we must prefix its name with a colon to make it clear that
* it is only a single argument.
*/
colon_if_necessary = strchr(Req->argv[1], ' ') ? ":":"";
/* Inform target client */
IRC_WriteStrClientPrefix(target, from, "INVITE %s %s%s", Req->argv[0],
colon_if_necessary, Req->argv[1]);
if (Client_Conn(target) > NONE) {
/* The target user is local, so we have to send the status code */
if (!IRC_WriteStrClientPrefix(from, target, RPL_INVITING_MSG,
Client_ID(from), Req->argv[0], colon_if_necessary, Req->argv[1]))
return DISCONNECTED;
if (strchr(Client_Modes(target), 'a') &&
!IRC_WriteStrClient(from, RPL_AWAY_MSG, Client_ID(from),
Client_ID(target), Client_Away(target)))
return DISCONNECTED;
}
return CONNECTED;
} /* IRC_INVITE */
/**
* Announce a channel and its users in the network.
*/
static bool
Announce_Channel(CLIENT *Client, CHANNEL *Chan)
{
CL2CHAN *cl2chan;
CLIENT *cl;
char str[COMMAND_LEN], *ptr;
bool njoin, xop;
/* Check features of remote server */
njoin = Conn_Options(Client_Conn(Client)) & CONN_RFC1459 ? false : true;
xop = Client_HasFlag(Client, 'X') ? true : false;
/* Get all the members of this channel */
cl2chan = Channel_FirstMember(Chan);
snprintf(str, sizeof(str), "NJOIN %s :", Channel_Name(Chan));
while (cl2chan) {
cl = Channel_GetClient(cl2chan);
assert(cl != NULL);
if (njoin) {
/* RFC 2813: send NJOIN with nicknames and modes
* (if user is channel operator or has voice) */
if (str[strlen(str) - 1] != ':')
strlcat(str, ",", sizeof(str));
/* Prepare user prefix (ChanOp, voiced, ...) */
if (xop && Channel_UserHasMode(Chan, cl, 'q'))
strlcat(str, "~", sizeof(str));
if (xop && Channel_UserHasMode(Chan, cl, 'a'))
strlcat(str, "&", sizeof(str));
if (Channel_UserHasMode(Chan, cl, 'o'))
strlcat(str, "@", sizeof(str));
if (xop && Channel_UserHasMode(Chan, cl, 'h'))
strlcat(str, "%", sizeof(str));
if (Channel_UserHasMode(Chan, cl, 'v'))
strlcat(str, "+", sizeof(str));
strlcat(str, Client_ID(cl), sizeof(str));
/* Send the data if the buffer is "full" */
if (strlen(str) > (sizeof(str) - CLIENT_NICK_LEN - 8)) {
if (!IRC_WriteStrClient(Client, "%s", str))
return DISCONNECTED;
snprintf(str, sizeof(str), "NJOIN %s :",
Channel_Name(Chan));
}
} else {
/* RFC 1459: no NJOIN, send JOIN and MODE */
if (!IRC_WriteStrClientPrefix(Client, cl, "JOIN %s",
Channel_Name(Chan)))
return DISCONNECTED;
ptr = Channel_UserModes(Chan, cl);
while (*ptr) {
if (!IRC_WriteStrClientPrefix(Client, cl,
"MODE %s +%c %s",
Channel_Name(Chan), ptr[0],
Client_ID(cl)))
return DISCONNECTED;
ptr++;
}
}
cl2chan = Channel_NextMember(Chan, cl2chan);
}
/* Data left in the buffer? */
if (str[strlen(str) - 1] != ':') {
/* Yes, send it ... */
if (!IRC_WriteStrClient(Client, "%s", str))
return DISCONNECTED;
}
return CONNECTED;
} /* Announce_Channel */
/**
* Handle ENDOFMOTD (376) numeric and login remote server.
* The peer is either an IRC server (no IRC+ protocol), or we got the
* ENDOFMOTD numeric from an IRC+ server. We have to register the new server.
*/
GLOBAL bool
IRC_Num_ENDOFMOTD(CLIENT * Client, UNUSED REQUEST * Req)
{
int max_hops, i;
CLIENT *c;
CHANNEL *chan;
Client_SetType(Client, CLIENT_SERVER);
Log(LOG_NOTICE | LOG_snotice,
"Server \"%s\" registered (connection %d, 1 hop - direct link).",
Client_ID(Client), Client_Conn(Client));
/* Get highest hop count */
max_hops = 0;
c = Client_First();
while (c) {
if (Client_Hops(c) > max_hops)
max_hops = Client_Hops(c);
c = Client_Next(c);
}
/* Inform the new server about all other servers, and announce the
* new server to all the already registered ones. Important: we have
* to do this "in order" and can't introduce servers of which the
* "toplevel server" isn't known already. */
for (i = 0; i < (max_hops + 1); i++) {
for (c = Client_First(); c != NULL; c = Client_Next(c)) {
if (Client_Type(c) != CLIENT_SERVER)
continue; /* not a server */
if (Client_Hops(c) != i)
continue; /* not actual "nesting level" */
if (c == Client || c == Client_ThisServer())
continue; /* that's us or the peer! */
if (!Announce_Server(Client, c))
return DISCONNECTED;
}
}
/* Announce all the users to the new server */
c = Client_First();
while (c) {
if (Client_Type(c) == CLIENT_USER ||
Client_Type(c) == CLIENT_SERVICE) {
if (!Client_Announce(Client, Client_ThisServer(), c))
return DISCONNECTED;
}
c = Client_Next(c);
}
/* Announce all channels to the new server */
chan = Channel_First();
while (chan) {
if (Channel_IsLocal(chan)) {
chan = Channel_Next(chan);
continue;
}
#ifdef IRCPLUS
/* Send CHANINFO if the peer supports it */
if (Client_HasFlag(Client, 'C')) {
if (!Send_CHANINFO(Client, chan))
return DISCONNECTED;
}
#endif
if (!Announce_Channel(Client, chan))
return DISCONNECTED;
/* Get next channel ... */
chan = Channel_Next(chan);
}
#ifdef IRCPLUS
if (Client_HasFlag(Client, 'L')) {
LogDebug("Synchronizing INVITE- and BAN-lists ...");
if (!Synchronize_Lists(Client))
return DISCONNECTED;
}
#endif
if (!IRC_WriteStrClient(Client, "PING :%s",
Client_ID(Client_ThisServer())))
return DISCONNECTED;
return CONNECTED;
} /* IRC_Num_ENDOFMOTD */
/**
* Handler for the IRC command "SERVER".
* See RFC 2813 section 4.1.2.
*/
GLOBAL bool
IRC_SERVER( CLIENT *Client, REQUEST *Req )
{
char str[LINE_LEN];
CLIENT *from, *c;
int i;
CONN_ID con;
assert( Client != NULL );
assert( Req != NULL );
/* Return an error if this is not a local client */
if (Client_Conn(Client) <= NONE)
return IRC_WriteStrClient(Client, ERR_UNKNOWNCOMMAND_MSG,
Client_ID(Client), Req->command);
if (Client_Type(Client) == CLIENT_GOTPASS ||
Client_Type(Client) == CLIENT_GOTPASS_2813) {
/* We got a PASS command from the peer, and now a SERVER
* command: the peer tries to register itself as a server. */
LogDebug("Connection %d: got SERVER command (new server link) ...",
Client_Conn(Client));
if(( Req->argc != 2 ) && ( Req->argc != 3 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
/* Ist this server configured on out side? */
for( i = 0; i < MAX_SERVERS; i++ ) if( strcasecmp( Req->argv[0], Conf_Server[i].name ) == 0 ) break;
if( i >= MAX_SERVERS )
{
Log( LOG_ERR, "Connection %d: Server \"%s\" not configured here!", Client_Conn( Client ), Req->argv[0] );
Conn_Close( Client_Conn( Client ), NULL, "Server not configured here", true);
return DISCONNECTED;
}
if( strcmp( Client_Password( Client ), Conf_Server[i].pwd_in ) != 0 )
{
/* wrong password */
Log( LOG_ERR, "Connection %d: Got bad password from server \"%s\"!", Client_Conn( Client ), Req->argv[0] );
Conn_Close( Client_Conn( Client ), NULL, "Bad password", true);
return DISCONNECTED;
}
/* Is there a registered server with this ID? */
if( ! Client_CheckID( Client, Req->argv[0] )) return DISCONNECTED;
Client_SetID( Client, Req->argv[0] );
Client_SetHops( Client, 1 );
Client_SetInfo( Client, Req->argv[Req->argc - 1] );
/* Is this server registering on our side, or are we connecting to
* a remote server? */
con = Client_Conn(Client);
if (Client_Token(Client) != TOKEN_OUTBOUND) {
/* Incoming connection, send user/pass */
if (!IRC_WriteStrClient(Client, "PASS %s %s",
Conf_Server[i].pwd_out,
NGIRCd_ProtoID)
|| !IRC_WriteStrClient(Client, "SERVER %s 1 :%s",
Conf_ServerName,
Conf_ServerInfo)) {
Conn_Close(con, "Unexpected server behavior!",
NULL, false);
return DISCONNECTED;
}
Client_SetIntroducer(Client, Client);
Client_SetToken(Client, 1);
} else {
/* outgoing connect, we already sent a SERVER and PASS
* command to the peer */
Client_SetToken(Client, atoi(Req->argv[1]));
}
/* Mark this connection as belonging to an configured server */
Conf_SetServer(i, con);
/* Check protocol level */
if (Client_Type(Client) == CLIENT_GOTPASS) {
/* We got a "simple" PASS command, so the peer is
* using the protocol as defined in RFC 1459. */
if (! (Conn_Options(con) & CONN_RFC1459))
Log(LOG_INFO,
"Switching connection %d (\"%s\") to RFC 1459 compatibility mode.",
con, Client_ID(Client));
Conn_SetOption(con, CONN_RFC1459);
}
Client_SetType(Client, CLIENT_UNKNOWNSERVER);
#ifdef ZLIB
if (strchr(Client_Flags(Client), 'Z') && !Zip_InitConn(con)) {
Conn_Close( con, "Can't inizialize compression (zlib)!", NULL, false );
return DISCONNECTED;
}
#endif
#ifdef IRCPLUS
if (strchr(Client_Flags(Client), 'H')) {
LogDebug("Peer supports IRC+ extended server handshake ...");
if (!IRC_Send_ISUPPORT(Client))
return DISCONNECTED;
return IRC_WriteStrClient(Client, RPL_ENDOFMOTD_MSG,
Client_ID(Client));
} else {
#endif
if (Conf_MaxNickLength != CLIENT_NICK_LEN_DEFAULT)
Log(LOG_CRIT,
"Attention: this server uses a non-standard nick length, but the peer doesn't support the IRC+ extended server handshake!");
#ifdef IRCPLUS
}
#endif
return IRC_Num_ENDOFMOTD(Client, Req);
}
else if( Client_Type( Client ) == CLIENT_SERVER )
{
/* New server is being introduced to the network */
if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
/* check for existing server with same ID */
if( ! Client_CheckID( Client, Req->argv[0] )) return DISCONNECTED;
from = Client_Search( Req->prefix );
if( ! from )
{
/* Uh, Server, that introduced the new server is unknown?! */
Log( LOG_ALERT, "Unknown ID in prefix of SERVER: \"%s\"! (on connection %d)", Req->prefix, Client_Conn( Client ));
Conn_Close( Client_Conn( Client ), NULL, "Unknown ID in prefix of SERVER", true);
return DISCONNECTED;
}
c = Client_NewRemoteServer(Client, Req->argv[0], from, atoi(Req->argv[1]), atoi(Req->argv[2]), Req->argv[3], true);
if (!c) {
Log( LOG_ALERT, "Can't create client structure for server! (on connection %d)", Client_Conn( Client ));
Conn_Close( Client_Conn( Client ), NULL, "Can't allocate client structure for remote server", true);
return DISCONNECTED;
}
if(( Client_Hops( c ) > 1 ) && ( Req->prefix[0] )) snprintf( str, sizeof( str ), "connected to %s, ", Client_ID( from ));
else strcpy( str, "" );
Log( LOG_NOTICE|LOG_snotice, "Server \"%s\" registered (via %s, %s%d hop%s).", Client_ID( c ), Client_ID( Client ), str, Client_Hops( c ), Client_Hops( c ) > 1 ? "s": "" );
/* notify other servers */
IRC_WriteStrServersPrefix( Client, from, "SERVER %s %d %d :%s", Client_ID( c ), Client_Hops( c ) + 1, Client_MyToken( c ), Client_Info( c ));
return CONNECTED;
} else
return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
} /* IRC_SERVER */
/**
* Handler for the IRC command "SQUIT".
* See RFC 2813 section 4.1.2 and RFC 2812 section 3.1.8.
*/
GLOBAL bool
IRC_SQUIT(CLIENT * Client, REQUEST * Req)
{
char msg[COMMAND_LEN], logmsg[COMMAND_LEN];
CLIENT *from, *target;
CONN_ID con;
int loglevel;
assert(Client != NULL);
assert(Req != NULL);
if (Client_Type(Client) != CLIENT_SERVER
&& !Client_HasMode(Client, 'o'))
return Op_NoPrivileges(Client, Req);
/* Bad number of arguments? */
if (Req->argc != 2)
return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
if (Client_Type(Client) == CLIENT_SERVER && Req->prefix) {
from = Client_Search(Req->prefix);
if (Client_Type(from) != CLIENT_SERVER
&& !Op_Check(Client, Req))
return Op_NoPrivileges(Client, Req);
} else
from = Client;
if (!from)
return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
Client_ID(Client), Req->prefix);
if (Client_Type(Client) == CLIENT_USER)
loglevel = LOG_NOTICE | LOG_snotice;
else
loglevel = LOG_DEBUG;
Log(loglevel, "Got SQUIT from %s for \"%s\": \"%s\" ...",
Client_ID(from), Req->argv[0], Req->argv[1]);
target = Client_Search(Req->argv[0]);
if (Client_Type(Client) != CLIENT_SERVER &&
target == Client_ThisServer())
return Op_NoPrivileges(Client, Req);
if (!target) {
/* The server is (already) unknown */
Log(LOG_WARNING,
"Got SQUIT from %s for unknown server \"%s\"!?",
Client_ID(Client), Req->argv[0]);
return CONNECTED;
}
con = Client_Conn(target);
if (Req->argv[1][0])
if (Client_NextHop(from) != Client || con > NONE)
snprintf(msg, sizeof(msg), "%s (SQUIT from %s)",
Req->argv[1], Client_ID(from));
else
strlcpy(msg, Req->argv[1], sizeof(msg));
else
snprintf(msg, sizeof(msg), "Got SQUIT from %s",
Client_ID(from));
if (con > NONE) {
/* We are directly connected to the target server, so we
* have to tear down the connection and to inform all the
* other remaining servers in the network */
IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
"Received SQUIT %s from %s: %s",
Req->argv[0], Client_ID(from),
Req->argv[1][0] ? Req->argv[1] : "-");
Conn_Close(con, NULL, msg, true);
if (con == Client_Conn(Client))
return DISCONNECTED;
} else {
/* This server is not directly connected, so the SQUIT must
* be forwarded ... */
if (Client_Type(from) != CLIENT_SERVER) {
/* The origin is not an IRC server, so don't evaluate
* this SQUIT but simply forward it */
IRC_WriteStrClientPrefix(Client_NextHop(target),
from, "SQUIT %s :%s", Req->argv[0], Req->argv[1]);
} else {
/* SQUIT has been generated by another server, so
* remove the target server from the network! */
logmsg[0] = '\0';
if (!strchr(msg, '('))
snprintf(logmsg, sizeof(logmsg),
"%s (SQUIT from %s)", Req->argv[1],
Client_ID(from));
Client_Destroy(target, logmsg[0] ? logmsg : msg,
msg, false);
}
}
return CONNECTED;
} /* IRC_SQUIT */
GLOBAL bool
IRC_NJOIN( CLIENT *Client, REQUEST *Req )
{
char nick_in[COMMAND_LEN], nick_out[COMMAND_LEN], *channame, *ptr, modes[8];
bool is_op, is_voiced;
CHANNEL *chan;
CLIENT *c;
assert( Client != NULL );
assert( Req != NULL );
if( Req->argc != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
strlcpy( nick_in, Req->argv[1], sizeof( nick_in ));
strcpy( nick_out, "" );
channame = Req->argv[0];
ptr = strtok( nick_in, "," );
while( ptr )
{
is_op = is_voiced = false;
/* cut off prefixes */
while(( *ptr == '@' ) || ( *ptr == '+' ))
{
if( *ptr == '@' ) is_op = true;
if( *ptr == '+' ) is_voiced = true;
ptr++;
}
c = Client_Search( ptr );
if( c )
{
Channel_Join( c, channame );
chan = Channel_Search( channame );
assert( chan != NULL );
if( is_op ) Channel_UserModeAdd( chan, c, 'o' );
if( is_voiced ) Channel_UserModeAdd( chan, c, 'v' );
/* announce to channel... */
IRC_WriteStrChannelPrefix( Client, chan, c, false, "JOIN :%s", channame );
/* set Channel-User-Modes */
strlcpy( modes, Channel_UserModes( chan, c ), sizeof( modes ));
if( modes[0] )
{
/* send modes to channel */
IRC_WriteStrChannelPrefix( Client, chan, Client, false, "MODE %s +%s %s", channame, modes, Client_ID( c ));
}
if( nick_out[0] != '\0' ) strlcat( nick_out, ",", sizeof( nick_out ));
if( is_op ) strlcat( nick_out, "@", sizeof( nick_out ));
if( is_voiced ) strlcat( nick_out, "+", sizeof( nick_out ));
strlcat( nick_out, ptr, sizeof( nick_out ));
}
else Log( LOG_ERR, "Got NJOIN for unknown nick \"%s\" for channel \"%s\"!", ptr, channame );
/* search for next Nick */
ptr = strtok( NULL, "," );
}
/* forward to other servers */
if( nick_out[0] != '\0' ) IRC_WriteStrServersPrefix( Client, Client_ThisServer( ), "NJOIN %s :%s", Req->argv[0], nick_out );
return CONNECTED;
} /* IRC_NJOIN */
GLOBAL bool
IRC_KICK(CLIENT *Client, REQUEST *Req)
{
CLIENT *from;
char *itemList = Req->argv[0];
const char* currentNick, *currentChannel, *reason;
unsigned int channelCount = 1;
unsigned int nickCount = 1;
assert( Client != NULL );
assert( Req != NULL );
if ((Req->argc < 2) || (Req->argc > 3))
return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
while (*itemList) {
if (*itemList == ',') {
*itemList = '\0';
channelCount++;
}
itemList++;
}
itemList = Req->argv[1];
while (*itemList) {
if (*itemList == ',') {
*itemList = '\0';
nickCount++;
}
itemList++;
}
if (Client_Type(Client) == CLIENT_SERVER)
from = Client_Search(Req->prefix);
else
from = Client;
if (!from)
return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
Client_ID(Client), Req->prefix);
reason = Req->argc == 3 ? Req->argv[2] : Client_ID(from);
currentNick = Req->argv[1];
currentChannel = Req->argv[0];
if (channelCount == 1) {
while (nickCount > 0) {
if (!try_kick(Client, from, currentNick,
currentChannel, reason))
return false;
while (*currentNick)
currentNick++;
currentNick++;
nickCount--;
}
} else if (channelCount == nickCount) {
while (nickCount > 0) {
if (!try_kick(Client, from, currentNick,
currentChannel, reason))
return false;
while (*currentNick)
currentNick++;
while (*currentChannel)
currentChannel++;
currentNick++;
currentChannel++;
nickCount--;
}
} else {
return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
}
return true;
} /* IRC_KICK */
/**
* Check weather a local client is allowed to join an already existing
* channel or not.
*
* @param Client Client that sent the JOIN command
* @param chan Channel to check
* @param channame Name of the channel
* @param key Provided channel key (or NULL)
* @returns true if client is allowed to join, false otherwise
*/
static bool
join_allowed(CLIENT *Client, CHANNEL *chan, const char *channame,
const char *key)
{
bool is_invited, is_banned, is_exception;
/* Allow IRC operators to overwrite channel limits */
if (Client_HasMode(Client, 'o'))
return true;
is_banned = Lists_Check(Channel_GetListBans(chan), Client);
is_exception = Lists_Check(Channel_GetListExcepts(chan), Client);
is_invited = Lists_Check(Channel_GetListInvites(chan), Client);
if (is_banned && !is_invited && !is_exception) {
/* Client is banned from channel (and not on invite list) */
IRC_WriteErrClient(Client, ERR_BANNEDFROMCHAN_MSG,
Client_ID(Client), channame);
return false;
}
if (Channel_HasMode(chan, 'i') && !is_invited) {
/* Channel is "invite-only" and client is not on invite list */
IRC_WriteErrClient(Client, ERR_INVITEONLYCHAN_MSG,
Client_ID(Client), channame);
return false;
}
if (!Channel_CheckKey(chan, Client, key ? key : "")) {
/* Channel is protected by a channel key and the client
* didn't specify the correct one */
IRC_WriteErrClient(Client, ERR_BADCHANNELKEY_MSG,
Client_ID(Client), channame);
return false;
}
if (Channel_HasMode(chan, 'l') &&
(Channel_MaxUsers(chan) <= Channel_MemberCount(chan))) {
/* There are more clints joined to this channel than allowed */
IRC_WriteErrClient(Client, ERR_CHANNELISFULL_MSG,
Client_ID(Client), channame);
return false;
}
if (Channel_HasMode(chan, 'z') && !Conn_UsesSSL(Client_Conn(Client))) {
/* Only "secure" clients are allowed, but clients doesn't
* use SSL encryption */
IRC_WriteErrClient(Client, ERR_SECURECHANNEL_MSG,
Client_ID(Client), channame);
return false;
}
if (Channel_HasMode(chan, 'O') && !Client_HasMode(Client, 'o')) {
/* Only IRC operators are allowed! */
IRC_WriteErrClient(Client, ERR_OPONLYCHANNEL_MSG,
Client_ID(Client), channame);
return false;
}
if (Channel_HasMode(chan, 'R') && !Client_HasMode(Client, 'R')) {
/* Only registered users are allowed! */
IRC_WriteErrClient(Client, ERR_REGONLYCHANNEL_MSG,
Client_ID(Client), channame);
return false;
}
return true;
} /* join_allowed */
/**
* Announce an user or service to a server.
*
* This function differentiates between RFC1459 and RFC2813 server links and
* generates the appropriate commands to register the user or service.
*
* @param Client Server
* @param Prefix Prefix for the generated commands
* @param User User to announce
*/
GLOBAL bool
Client_Announce(CLIENT * Client, CLIENT * Prefix, CLIENT * User)
{
CONN_ID conn;
char *modes, *user, *host;
modes = Client_Modes(User);
user = Client_User(User) ? Client_User(User) : "-";
host = Client_Hostname(User) ? Client_Hostname(User) : "-";
conn = Client_Conn(Client);
if (Conn_Options(conn) & CONN_RFC1459) {
/* RFC 1459 mode: separate NICK and USER commands */
if (! Conn_WriteStr(conn, "NICK %s :%d",
Client_ID(User), Client_Hops(User) + 1))
return DISCONNECTED;
if (! Conn_WriteStr(conn, ":%s USER %s %s %s :%s",
Client_ID(User), user, host,
Client_ID(Client_Introducer(User)),
Client_Info(User)))
return DISCONNECTED;
if (modes[0]) {
if (! Conn_WriteStr(conn, ":%s MODE %s +%s",
Client_ID(User), Client_ID(User),
modes))
return DISCONNECTED;
}
} else {
/* RFC 2813 mode: one combined NICK or SERVICE command */
if (Client_Type(User) == CLIENT_SERVICE
&& Client_HasFlag(Client, 'S')) {
if (!IRC_WriteStrClientPrefix(Client, Prefix,
"SERVICE %s %d * +%s %d :%s",
Client_Mask(User),
Client_MyToken(Client_Introducer(User)),
modes, Client_Hops(User) + 1,
Client_Info(User)))
return DISCONNECTED;
} else {
if (!IRC_WriteStrClientPrefix(Client, Prefix,
"NICK %s %d %s %s %d +%s :%s",
Client_ID(User), Client_Hops(User) + 1,
user, host,
Client_MyToken(Client_Introducer(User)),
modes, Client_Info(User)))
return DISCONNECTED;
}
}
if (Client_HasFlag(Client, 'M')) {
/* Synchronize metadata */
if (Client_HostnameCloaked(User)) {
if (!IRC_WriteStrClientPrefix(Client, Prefix,
"METADATA %s cloakhost :%s",
Client_ID(User),
Client_HostnameCloaked(User)))
return DISCONNECTED;
}
if (Client_AccountName(User)) {
if (!IRC_WriteStrClientPrefix(Client, Prefix,
"METADATA %s accountname :%s",
Client_ID(User),
Client_AccountName(User)))
return DISCONNECTED;
}
if (Conn_GetCertFp(Client_Conn(User))) {
if (!IRC_WriteStrClientPrefix(Client, Prefix,
"METADATA %s certfp :%s",
Client_ID(User),
Conn_GetCertFp(Client_Conn(User))))
return DISCONNECTED;
}
}
return CONNECTED;
} /* Client_Announce */
/**
* Kick user from Channel
*/
GLOBAL void
Channel_Kick(CLIENT *Peer, CLIENT *Target, CLIENT *Origin, const char *Name,
const char *Reason )
{
CHANNEL *chan;
char *ptr, *target_modes;
bool can_kick = false;
assert(Peer != NULL);
assert(Target != NULL);
assert(Origin != NULL);
assert(Name != NULL);
assert(Reason != NULL);
/* Check that channel exists */
chan = Channel_Search( Name );
if( ! chan )
{
IRC_WriteStrClient( Origin, ERR_NOSUCHCHANNEL_MSG, Client_ID( Origin ), Name );
return;
}
if (Client_Type(Peer) != CLIENT_SERVER &&
Client_Type(Origin) != CLIENT_SERVICE) {
/* Check that user is on the specified channel */
if (!Channel_IsMemberOf(chan, Origin)) {
IRC_WriteStrClient( Origin, ERR_NOTONCHANNEL_MSG,
Client_ID(Origin), Name);
return;
}
}
if(Client_Type(Peer) == CLIENT_USER) {
/* Channel mode 'Q' and user mode 'q' on target: nobody but
* IRC Operators and servers can kick the target user */
if ((strchr(Channel_Modes(chan), 'Q')
|| Client_HasMode(Target, 'q')
|| Client_Type(Target) == CLIENT_SERVICE)
&& !Client_HasMode(Origin, 'o')) {
IRC_WriteStrClient(Origin, ERR_KICKDENY_MSG,
Client_ID(Origin), Name,
Client_ID(Target));
return;
}
/* Check if client has the rights to kick target */
ptr = Channel_UserModes(chan, Peer);
target_modes = Channel_UserModes(chan, Target);
while(*ptr) {
/* Owner can kick everyone */
if ( *ptr == 'q') {
can_kick = true;
break;
}
/* Admin can't kick owner */
if ( *ptr == 'a' ) {
if (!strchr(target_modes, 'q')) {
can_kick = true;
break;
}
}
/* Op can't kick owner | admin */
if ( *ptr == 'o' ) {
if (!strchr(target_modes, 'q') &&
!strchr(target_modes, 'a')) {
can_kick = true;
break;
}
}
/* Half Op can't kick owner | admin | op */
if ( *ptr == 'h' ) {
if (!strchr(target_modes, 'q') &&
!strchr(target_modes, 'a') &&
!strchr(target_modes, 'o')) {
can_kick = true;
break;
}
}
ptr++;
}
if(!can_kick) {
IRC_WriteStrClient(Origin, ERR_CHANOPPRIVTOOLOW_MSG,
Client_ID(Origin), Name);
return;
}
}
/* Check that the client to be kicked is on the specified channel */
if (!Channel_IsMemberOf(chan, Target)) {
IRC_WriteStrClient(Origin, ERR_USERNOTINCHANNEL_MSG,
Client_ID(Origin), Client_ID(Target), Name );
return;
}
/* Kick Client from channel */
Remove_Client( REMOVE_KICK, chan, Target, Origin, Reason, true);
} /* Channel_Kick */
/**
* Handler for the IRC "KILL" command.
*
* This function implements the IRC command "KILL" wich is used to selectively
* disconnect clients. It can be used by IRC operators and servers, for example
* to "solve" nick collisions after netsplits. See RFC 2812 section 3.7.1.
*
* Please note that this function is also called internally, without a real
* KILL command being received over the network! Client is Client_ThisServer()
* in this case, and the prefix in Req is NULL.
*
* @param Client The client from which this command has been received
* or Client_ThisServer() when generated interanlly.
* @param Req Request structure with prefix and all parameters.
* @returns CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_KILL( CLIENT *Client, REQUEST *Req )
{
CLIENT *prefix, *c;
char reason[COMMAND_LEN], *msg;
CONN_ID my_conn, conn;
assert (Client != NULL);
assert (Req != NULL);
if (Client_Type(Client) != CLIENT_SERVER && !Client_OperByMe(Client))
return IRC_WriteStrClient(Client, ERR_NOPRIVILEGES_MSG,
Client_ID(Client));
if (Req->argc != 2)
return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
/* Get prefix (origin); use the client if no prefix is given. */
if (Req->prefix)
prefix = Client_Search(Req->prefix);
else
prefix = Client;
/* Log a warning message and use this server as origin when the
* prefix (origin) is invalid. */
if (!prefix) {
Log(LOG_WARNING, "Got KILL with invalid prefix: \"%s\"!",
Req->prefix );
prefix = Client_ThisServer();
}
if (Client != Client_ThisServer())
Log(LOG_NOTICE|LOG_snotice,
"Got KILL command from \"%s\" for \"%s\": %s",
Client_Mask(prefix), Req->argv[0], Req->argv[1]);
/* Build reason string: Prefix the "reason" if the originator is a
* regular user, so users can't spoof KILLs of servers. */
if (Client_Type(Client) == CLIENT_USER)
snprintf(reason, sizeof(reason), "KILLed by %s: %s",
Client_ID(Client), Req->argv[1]);
else
strlcpy(reason, Req->argv[1], sizeof(reason));
/* Inform other servers */
IRC_WriteStrServersPrefix(Client, prefix, "KILL %s :%s",
Req->argv[0], reason);
/* Save ID of this connection */
my_conn = Client_Conn( Client );
/* Do we host such a client? */
c = Client_Search( Req->argv[0] );
if( c )
{
if(( Client_Type( c ) != CLIENT_USER ) &&
( Client_Type( c ) != CLIENT_GOTNICK ))
{
/* Target of this KILL is not a regular user, this is
* invalid! So we ignore this case if we received a
* regular KILL from the network and try to kill the
* client/connection anyway (but log an error!) if the
* origin is the local server. */
if( Client != Client_ThisServer( ))
{
/* Invalid KILL received from remote */
if( Client_Type( c ) == CLIENT_SERVER )
msg = ERR_CANTKILLSERVER_MSG;
else
msg = ERR_NOPRIVILEGES_MSG;
return IRC_WriteStrClient( Client, msg,
Client_ID( Client ));
}
Log( LOG_ERR, "Got KILL for invalid client type: %d, \"%s\"!",
Client_Type( c ), Req->argv[0] );
}
/* Kill the client NOW:
* - Close the local connection (if there is one),
* - Destroy the CLIENT structure for remote clients.
* Note: Conn_Close() removes the CLIENT structure as well. */
conn = Client_Conn( c );
if(conn > NONE)
Conn_Close(conn, NULL, reason, true);
else
Client_Destroy(c, NULL, reason, false);
}
else
Log( LOG_NOTICE, "Client with nick \"%s\" is unknown here.", Req->argv[0] );
/* Are we still connected or were we killed, too? */
if(( my_conn > NONE ) && ( Conn_GetClient( my_conn )))
return CONNECTED;
else
return DISCONNECTED;
} /* IRC_KILL */
/**
* Handler for the IRC command "KICK".
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @return CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_KICK(CLIENT *Client, REQUEST *Req)
{
CLIENT *from;
char *itemList = Req->argv[0];
const char* currentNick, *currentChannel, *reason;
unsigned int channelCount = 1;
unsigned int nickCount = 1;
assert( Client != NULL );
assert( Req != NULL );
_IRC_ARGC_BETWEEN_OR_RETURN_(Client, Req, 2, 3)
_IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
while (*itemList) {
if (*itemList == ',') {
*itemList = '\0';
channelCount++;
}
itemList++;
}
itemList = Req->argv[1];
while (*itemList) {
if (*itemList == ',') {
*itemList = '\0';
nickCount++;
}
itemList++;
}
reason = Req->argc == 3 ? Req->argv[2] : Client_ID(from);
currentNick = Req->argv[1];
currentChannel = Req->argv[0];
if (channelCount == 1) {
while (nickCount > 0) {
if (!try_kick(Client, from, currentNick,
currentChannel, reason))
return false;
while (*currentNick)
currentNick++;
currentNick++;
nickCount--;
}
} else if (channelCount == nickCount) {
while (nickCount > 0) {
if (!try_kick(Client, from, currentNick,
currentChannel, reason))
return false;
while (*currentNick)
currentNick++;
while (*currentChannel)
currentChannel++;
currentNick++;
currentChannel++;
nickCount--;
}
} else {
return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
}
return true;
} /* IRC_KICK */
static bool
Send_Message(CLIENT * Client, REQUEST * Req, int ForceType, bool SendErrors)
{
CLIENT *cl, *from;
CL2CHAN *cl2chan;
CHANNEL *chan;
char *currentTarget = Req->argv[0];
char *lastCurrentTarget = NULL;
assert(Client != NULL);
assert(Req != NULL);
if (Req->argc == 0) {
if (!SendErrors)
return CONNECTED;
return IRC_WriteStrClient(Client, ERR_NORECIPIENT_MSG,
Client_ID(Client), Req->command);
}
if (Req->argc == 1) {
if (!SendErrors)
return CONNECTED;
return IRC_WriteStrClient(Client, ERR_NOTEXTTOSEND_MSG,
Client_ID(Client));
}
if (Req->argc > 2) {
if (!SendErrors)
return CONNECTED;
return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
}
if (Client_Type(Client) == CLIENT_SERVER)
from = Client_Search(Req->prefix);
else
from = Client;
if (!from)
return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
Client_ID(Client), Req->prefix);
/* handle msgtarget = msgto *("," msgto) */
currentTarget = strtok_r(currentTarget, ",", &lastCurrentTarget);
ngt_UpperStr(Req->command);
while (currentTarget) {
/* Check for and handle valid <msgto> of form:
* RFC 2812 2.3.1:
* msgto = channel / ( user [ "%" host ] "@" servername )
* msgto =/ ( user "%" host ) / targetmask
* msgto =/ nickname / ( nickname "!" user "@" host )
*/
if (strchr(currentTarget, '!') == NULL)
/* nickname */
cl = Client_Search(currentTarget);
else
cl = NULL;
if (cl == NULL) {
/* If currentTarget isn't a nickname check for:
* user ["%" host] "@" servername
* user "%" host
* nickname "!" user "@" host
*/
char target[COMMAND_LEN];
char * nick = NULL;
char * user = NULL;
char * host = NULL;
char * server = NULL;
strlcpy(target, currentTarget, COMMAND_LEN);
server = strchr(target, '@');
if (server) {
*server = '\0';
server++;
}
host = strchr(target, '%');
if (host) {
*host = '\0';
host++;
}
user = strchr(target, '!');
if (user) {
/* msgto form: nick!user@host */
*user = '******';
user++;
nick = target;
host = server; /* not "@server" but "@host" */
} else {
user = target;
}
for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
if (Client_Type(cl) != CLIENT_USER &&
Client_Type(cl) != CLIENT_SERVICE)
continue;
if (nick != NULL && host != NULL) {
if (strcasecmp(nick, Client_ID(cl)) == 0 &&
strcasecmp(user, Client_User(cl)) == 0 &&
strcasecmp(host, Client_HostnameCloaked(cl)) == 0)
break;
else
continue;
}
if (strcasecmp(user, Client_User(cl)) != 0)
continue;
if (host != NULL && strcasecmp(host,
Client_HostnameCloaked(cl)) != 0)
continue;
if (server != NULL && strcasecmp(server,
Client_ID(Client_Introducer(cl))) != 0)
continue;
break;
}
}
if (cl) {
/* Target is a user, enforce type */
#ifndef STRICT_RFC
if (Client_Type(cl) != ForceType &&
!(ForceType == CLIENT_USER &&
(Client_Type(cl) == CLIENT_USER ||
Client_Type(cl) == CLIENT_SERVICE))) {
#else
if (Client_Type(cl) != ForceType) {
#endif
if (SendErrors && !IRC_WriteStrClient(
from, ERR_NOSUCHNICK_MSG,Client_ID(from),
currentTarget))
return DISCONNECTED;
goto send_next_target;
}
#ifndef STRICT_RFC
if (ForceType == CLIENT_SERVICE &&
(Conn_Options(Client_Conn(Client_NextHop(cl)))
& CONN_RFC1459)) {
/* SQUERY command but RFC 1459 link: convert
* request to PRIVMSG command */
Req->command = "PRIVMSG";
}
#endif
if (Client_HasMode(cl, 'C')) {
cl2chan = Channel_FirstChannelOf(cl);
while (cl2chan) {
chan = Channel_GetChannel(cl2chan);
if (Channel_IsMemberOf(chan, from))
break;
cl2chan = Channel_NextChannelOf(cl, cl2chan);
}
if (!cl2chan) {
if (SendErrors && !IRC_WriteStrClient(
from, ERR_NOTONSAMECHANNEL_MSG,
Client_ID(from), Client_ID(cl)))
return DISCONNECTED;
goto send_next_target;
}
}
if (SendErrors && (Client_Type(Client) != CLIENT_SERVER)
&& strchr(Client_Modes(cl), 'a')) {
/* Target is away */
if (!IRC_WriteStrClient(from, RPL_AWAY_MSG,
Client_ID(from),
Client_ID(cl),
Client_Away(cl)))
return DISCONNECTED;
}
if (Client_Conn(from) > NONE) {
Conn_UpdateIdle(Client_Conn(from));
}
if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
Req->command, Client_ID(cl),
Req->argv[1]))
return DISCONNECTED;
} else if (ForceType != CLIENT_SERVICE
&& (chan = Channel_Search(currentTarget))) {
if (!Channel_Write(chan, from, Client, Req->command,
SendErrors, Req->argv[1]))
return DISCONNECTED;
} else if (ForceType != CLIENT_SERVICE
/* $#: server/target mask, RFC 2812, sec. 3.3.1 */
&& strchr("$#", currentTarget[0])
&& strchr(currentTarget, '.')) {
/* targetmask */
if (!Send_Message_Mask(from, Req->command, currentTarget,
Req->argv[1], SendErrors))
return DISCONNECTED;
} else {
if (!SendErrors)
return CONNECTED;
if (!IRC_WriteStrClient(from, ERR_NOSUCHNICK_MSG,
Client_ID(from), currentTarget))
return DISCONNECTED;
}
send_next_target:
currentTarget = strtok_r(NULL, ",", &lastCurrentTarget);
if (currentTarget)
Conn_SetPenalty(Client_Conn(Client), 1);
}
return CONNECTED;
} /* Send_Message */
static bool
Send_Message_Mask(CLIENT * from, char * command, char * targetMask,
char * message, bool SendErrors)
{
CLIENT *cl;
bool client_match;
char *mask = targetMask + 1;
const char *check_wildcards;
cl = NULL;
if (strchr(Client_Modes(from), 'o') == NULL) {
if (!SendErrors)
return true;
return IRC_WriteStrClient(from, ERR_NOPRIVILEGES_MSG,
Client_ID(from));
}
/*
* RFC 2812, sec. 3.3.1 requires that targetMask have at least one
* dot (".") and no wildcards ("*", "?") following the last one.
*/
check_wildcards = strrchr(targetMask, '.');
assert(check_wildcards != NULL);
if (check_wildcards &&
check_wildcards[strcspn(check_wildcards, "*?")])
{
if (!SendErrors)
return true;
return IRC_WriteStrClient(from, ERR_WILDTOPLEVEL, targetMask);
}
/* #: hostmask, see RFC 2812, sec. 3.3.1 */
if (targetMask[0] == '#') {
for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
if (Client_Type(cl) != CLIENT_USER)
continue;
client_match = MatchCaseInsensitive(mask, Client_Hostname(cl));
if (client_match)
if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
command, Client_ID(cl), message))
return false;
}
} else {
assert(targetMask[0] == '$'); /* $: server mask, see RFC 2812, sec. 3.3.1 */
for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
if (Client_Type(cl) != CLIENT_USER)
continue;
client_match = MatchCaseInsensitive(mask,
Client_ID(Client_Introducer(cl)));
if (client_match)
if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
command, Client_ID(cl), message))
return false;
}
}
return CONNECTED;
} /* Send_Message_Mask */
/**
* Handle channel mode and channel-user mode changes
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @param Origin The originator of the MODE command (prefix).
* @param Channel The target channel of this MODE command.
* @return CONNECTED or DISCONNECTED.
*/
static bool
Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel)
{
char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], x[2],
argadd[CLIENT_PASS_LEN], *mode_ptr;
bool connected, set, skiponce, retval, use_servermode,
is_halfop, is_op, is_admin, is_owner, is_machine, is_oper;
int mode_arg, arg_arg, mode_arg_count = 0;
CLIENT *client;
long l;
size_t len;
is_halfop = is_op = is_admin = is_owner = is_machine = is_oper = false;
if (Channel_IsModeless(Channel))
return IRC_WriteErrClient(Client, ERR_NOCHANMODES_MSG,
Client_ID(Client), Channel_Name(Channel));
/* Mode request: let's answer it :-) */
if (Req->argc <= 1)
return Channel_Mode_Answer_Request(Origin, Channel);
/* Check if origin is oper and opers can use mode */
use_servermode = Conf_OperServerMode;
if(Client_HasMode(Client, 'o') && Conf_OperCanMode) {
is_oper = true;
}
/* Check if client is a server/service */
if(Client_Type(Client) == CLIENT_SERVER ||
Client_Type(Client) == CLIENT_SERVICE) {
is_machine = true;
}
/* Check if client is member of channel or an oper or an server/service */
if(!Channel_IsMemberOf(Channel, Client) && !is_oper && !is_machine)
return IRC_WriteErrClient(Origin, ERR_NOTONCHANNEL_MSG,
Client_ID(Origin),
Channel_Name(Channel));
mode_arg = 1;
mode_ptr = Req->argv[mode_arg];
if (Req->argc > mode_arg + 1)
arg_arg = mode_arg + 1;
else
arg_arg = -1;
/* Initial state: set or unset modes? */
skiponce = false;
switch (*mode_ptr) {
case '-':
set = false;
break;
case '+':
set = true;
break;
default:
set = true;
skiponce = true;
}
/* Prepare reply string */
strcpy(the_modes, set ? "+" : "-");
the_args[0] = '\0';
x[1] = '\0';
connected = CONNECTED;
while (mode_ptr) {
if (!skiponce)
mode_ptr++;
if (!*mode_ptr) {
/* Try next argument if there's any */
if (arg_arg < 0)
break;
if (arg_arg > mode_arg)
mode_arg = arg_arg;
else
mode_arg++;
if (mode_arg >= Req->argc)
break;
mode_ptr = Req->argv[mode_arg];
if (Req->argc > mode_arg + 1)
arg_arg = mode_arg + 1;
else
arg_arg = -1;
}
skiponce = false;
switch (*mode_ptr) {
case '+':
case '-':
if (((*mode_ptr == '+') && !set)
|| ((*mode_ptr == '-') && set)) {
/* Action modifier ("+"/"-") must be changed ... */
len = strlen(the_modes) - 1;
if (the_modes[len] == '+' || the_modes[len] == '-') {
/* Adjust last action modifier in result */
the_modes[len] = *mode_ptr;
} else {
/* Append modifier character to result string */
x[0] = *mode_ptr;
strlcat(the_modes, x, sizeof(the_modes));
}
set = *mode_ptr == '+';
}
continue;
}
/* Are there arguments left? */
if (arg_arg >= Req->argc)
arg_arg = -1;
if(!is_machine && !is_oper) {
if (Channel_UserHasMode(Channel, Client, 'q'))
is_owner = true;
if (Channel_UserHasMode(Channel, Client, 'a'))
is_admin = true;
if (Channel_UserHasMode(Channel, Client, 'o'))
is_op = true;
if (Channel_UserHasMode(Channel, Client, 'h'))
is_halfop = true;
}
/* Validate modes */
x[0] = '\0';
argadd[0] = '\0';
client = NULL;
switch (*mode_ptr) {
/* --- Channel modes --- */
case 'R': /* Registered users only */
case 's': /* Secret channel */
case 'z': /* Secure connections only */
if(!is_oper && !is_machine && !is_owner &&
!is_admin && !is_op) {
connected = IRC_WriteErrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin), Channel_Name(Channel));
goto chan_exit;
}
case 'i': /* Invite only */
case 'V': /* Invite disallow */
case 'M': /* Only identified nicks can write */
case 'm': /* Moderated */
case 'n': /* Only members can write */
case 'N': /* Can't change nick while on this channel */
case 'Q': /* No kicks */
case 't': /* Topic locked */
if(is_oper || is_machine || is_owner ||
is_admin || is_op || is_halfop)
x[0] = *mode_ptr;
else
connected = IRC_WriteErrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin), Channel_Name(Channel));
break;
case 'k': /* Channel key */
if (Mode_Limit_Reached(Client, mode_arg_count++))
goto chan_exit;
if (!set) {
if (is_oper || is_machine || is_owner ||
is_admin || is_op || is_halfop) {
x[0] = *mode_ptr;
if (Channel_HasMode(Channel, 'k'))
strlcpy(argadd, "*", sizeof(argadd));
if (arg_arg > mode_arg)
arg_arg++;
} else
connected = IRC_WriteErrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
break;
}
if (arg_arg > mode_arg) {
if (is_oper || is_machine || is_owner ||
is_admin || is_op || is_halfop) {
Channel_ModeDel(Channel, 'k');
Channel_SetKey(Channel,
Req->argv[arg_arg]);
strlcpy(argadd, Channel_Key(Channel),
sizeof(argadd));
x[0] = *mode_ptr;
} else {
connected = IRC_WriteErrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
}
Req->argv[arg_arg][0] = '\0';
arg_arg++;
} else {
#ifdef STRICT_RFC
/* Only send error message in "strict" mode,
* this is how ircd2.11 and others behave ... */
connected = IRC_WriteErrClient(Origin,
ERR_NEEDMOREPARAMS_MSG,
Client_ID(Origin), Req->command);
#endif
goto chan_exit;
}
break;
case 'l': /* Member limit */
if (Mode_Limit_Reached(Client, mode_arg_count++))
goto chan_exit;
if (!set) {
if (is_oper || is_machine || is_owner ||
is_admin || is_op || is_halfop)
x[0] = *mode_ptr;
else
connected = IRC_WriteErrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
break;
}
if (arg_arg > mode_arg) {
if (is_oper || is_machine || is_owner ||
is_admin || is_op || is_halfop) {
l = atol(Req->argv[arg_arg]);
if (l > 0 && l < 0xFFFF) {
Channel_ModeDel(Channel, 'l');
Channel_SetMaxUsers(Channel, l);
snprintf(argadd, sizeof(argadd),
"%ld", l);
x[0] = *mode_ptr;
}
} else {
connected = IRC_WriteErrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
}
Req->argv[arg_arg][0] = '\0';
arg_arg++;
} else {
#ifdef STRICT_RFC
/* Only send error message in "strict" mode,
* this is how ircd2.11 and others behave ... */
connected = IRC_WriteErrClient(Origin,
ERR_NEEDMOREPARAMS_MSG,
Client_ID(Origin), Req->command);
#endif
goto chan_exit;
}
break;
case 'O': /* IRC operators only */
if (set) {
/* Only IRC operators are allowed to
* set the 'O' channel mode! */
if(is_oper || is_machine)
x[0] = 'O';
else
connected = IRC_WriteErrClient(Origin,
ERR_NOPRIVILEGES_MSG,
Client_ID(Origin));
} else if(is_oper || is_machine || is_owner ||
is_admin || is_op)
x[0] = 'O';
else
connected = IRC_WriteErrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
break;
case 'P': /* Persistent channel */
if (set) {
/* Only IRC operators are allowed to
* set the 'P' channel mode! */
if(is_oper || is_machine)
x[0] = 'P';
else
connected = IRC_WriteErrClient(Origin,
ERR_NOPRIVILEGES_MSG,
Client_ID(Origin));
} else if(is_oper || is_machine || is_owner ||
is_admin || is_op)
x[0] = 'P';
else
connected = IRC_WriteErrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
break;
/* --- Channel user modes --- */
case 'q': /* Owner */
case 'a': /* Channel admin */
if(!is_oper && !is_machine && !is_owner && !is_admin) {
connected = IRC_WriteErrClient(Origin,
ERR_CHANOPPRIVTOOLOW_MSG,
Client_ID(Origin),
Channel_Name(Channel));
goto chan_exit;
}
case 'o': /* Channel operator */
if(!is_oper && !is_machine && !is_owner &&
!is_admin && !is_op) {
connected = IRC_WriteErrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
goto chan_exit;
}
case 'h': /* Half Op */
if(!is_oper && !is_machine && !is_owner &&
!is_admin && !is_op) {
connected = IRC_WriteErrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
goto chan_exit;
}
case 'v': /* Voice */
if (arg_arg > mode_arg) {
if (is_oper || is_machine || is_owner ||
is_admin || is_op || is_halfop) {
client = Client_Search(Req->argv[arg_arg]);
if (client)
x[0] = *mode_ptr;
else
connected = IRC_WriteErrClient(Origin,
ERR_NOSUCHNICK_MSG,
Client_ID(Origin),
Req->argv[arg_arg]);
} else {
connected = IRC_WriteErrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
}
Req->argv[arg_arg][0] = '\0';
arg_arg++;
} else {
#ifdef STRICT_RFC
/* Report an error to the client, when a user
* mode should be changed but no nickname is
* given. But don't do it when not in "strict"
* mode, because most other servers don't do
* it as well and some clients send "wired"
* MODE commands like "MODE #chan -ooo nick". */
connected = IRC_WriteErrClient(Origin,
ERR_NEEDMOREPARAMS_MSG,
Client_ID(Origin), Req->command);
#endif
goto chan_exit;
}
break;
/* --- Channel lists --- */
case 'I': /* Invite lists */
case 'b': /* Ban lists */
case 'e': /* Channel exception lists */
if (Mode_Limit_Reached(Client, mode_arg_count++))
goto chan_exit;
if (arg_arg > mode_arg) {
/* modify list */
if (is_oper || is_machine || is_owner ||
is_admin || is_op || is_halfop) {
connected = set
? Add_To_List(*mode_ptr, Origin,
Client, Channel,
Req->argv[arg_arg])
: Del_From_List(*mode_ptr, Origin,
Client, Channel,
Req->argv[arg_arg]);
} else {
connected = IRC_WriteErrClient(Origin,
ERR_CHANOPRIVSNEEDED_MSG,
Client_ID(Origin),
Channel_Name(Channel));
}
Req->argv[arg_arg][0] = '\0';
arg_arg++;
} else {
switch (*mode_ptr) {
case 'I':
Channel_ShowInvites(Origin, Channel);
break;
case 'b':
Channel_ShowBans(Origin, Channel);
break;
case 'e':
Channel_ShowExcepts(Origin, Channel);
break;
}
}
break;
default:
if (Client_Type(Client) != CLIENT_SERVER) {
Log(LOG_DEBUG,
"Unknown mode \"%c%c\" from \"%s\" on %s!?",
set ? '+' : '-', *mode_ptr,
Client_ID(Origin), Channel_Name(Channel));
connected = IRC_WriteErrClient(Origin,
ERR_UNKNOWNMODE_MSG,
Client_ID(Origin), *mode_ptr,
Channel_Name(Channel));
x[0] = '\0';
} else {
Log(LOG_DEBUG,
"Handling unknown mode \"%c%c\" from \"%s\" on %s ...",
set ? '+' : '-', *mode_ptr,
Client_ID(Origin), Channel_Name(Channel));
x[0] = *mode_ptr;
}
}
if (!connected)
break;
/* Is there a valid mode change? */
if (!x[0])
continue;
/* Validate target client */
if (client && (!Channel_IsMemberOf(Channel, client))) {
if (!IRC_WriteErrClient(Origin, ERR_USERNOTINCHANNEL_MSG,
Client_ID(Origin),
Client_ID(client),
Channel_Name(Channel)))
break;
continue;
}
if (client) {
/* Channel-User-Mode */
retval = set
? Channel_UserModeAdd(Channel, client, x[0])
: Channel_UserModeDel(Channel, client, x[0]);
if (retval) {
strlcat(the_args, " ", sizeof(the_args));
strlcat(the_args, Client_ID(client),
sizeof(the_args));
strlcat(the_modes, x, sizeof(the_modes));
LogDebug
("User \"%s\": Mode change on %s, now \"%s\"",
Client_Mask(client), Channel_Name(Channel),
Channel_UserModes(Channel, client));
}
} else {
/* Channel-Mode */
retval = set
? Channel_ModeAdd(Channel, x[0])
: Channel_ModeDel(Channel, x[0]);
if (retval) {
strlcat(the_modes, x, sizeof(the_modes));
LogDebug("Channel %s: Mode change, now \"%s\".",
Channel_Name(Channel),
Channel_Modes(Channel));
}
}
/* Are there additional arguments to add? */
if (argadd[0]) {
strlcat(the_args, " ", sizeof(the_args));
strlcat(the_args, argadd, sizeof(the_args));
}
}
chan_exit:
/* Are there changed modes? */
if (the_modes[1]) {
/* Clean up mode string */
len = strlen(the_modes) - 1;
if ((the_modes[len] == '+') || (the_modes[len] == '-'))
the_modes[len] = '\0';
if (Client_Type(Client) == CLIENT_SERVER) {
/* MODE requests for local channels from other servers
* are definitely invalid! */
if (Channel_IsLocal(Channel)) {
Log(LOG_ALERT, "Got remote MODE command for local channel!? Ignored.");
return CONNECTED;
}
/* Forward mode changes to channel users and all the
* other remote servers: */
IRC_WriteStrServersPrefix(Client, Origin,
"MODE %s %s%s", Channel_Name(Channel),
the_modes, the_args);
IRC_WriteStrChannelPrefix(Client, Channel, Origin,
false, "MODE %s %s%s", Channel_Name(Channel),
the_modes, the_args);
} else {
if (use_servermode)
Origin = Client_ThisServer();
/* Send reply to client and inform other servers and channel users */
connected = IRC_WriteStrClientPrefix(Client, Origin,
"MODE %s %s%s", Channel_Name(Channel),
the_modes, the_args);
/* Only forward requests for non-local channels */
if (!Channel_IsLocal(Channel))
IRC_WriteStrServersPrefix(Client, Origin,
"MODE %s %s%s", Channel_Name(Channel),
the_modes, the_args);
IRC_WriteStrChannelPrefix(Client, Channel, Origin,
false, "MODE %s %s%s", Channel_Name(Channel),
the_modes, the_args);
}
}
return connected;
} /* Channel_Mode */
/**
* Handler for the IRC "LIST" command.
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @return CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_LIST( CLIENT *Client, REQUEST *Req )
{
char *pattern;
CHANNEL *chan;
CLIENT *from, *target;
int count = 0;
assert(Client != NULL);
assert(Req != NULL);
_IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
if (Req->argc > 0)
pattern = strtok(Req->argv[0], ",");
else
pattern = "*";
if (Req->argc == 2) {
/* Forward to other server? */
target = Client_Search(Req->argv[1]);
if (! target || Client_Type(target) != CLIENT_SERVER)
return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
Client_ID(Client),
Req->argv[1]);
if (target != Client_ThisServer()) {
/* Target is indeed an other server, forward it! */
return IRC_WriteStrClientPrefix(target, from,
"LIST %s :%s",
Req->argv[0],
Req->argv[1]);
}
}
while (pattern) {
/* Loop through all the channels */
if (Req->argc > 0)
ngt_LowerStr(pattern);
chan = Channel_First();
while (chan) {
/* Check search pattern */
if (MatchCaseInsensitive(pattern, Channel_Name(chan))) {
/* Gotcha! */
if (!Channel_HasMode(chan, 's')
|| Channel_IsMemberOf(chan, from)
|| (!Conf_MorePrivacy
&& Client_HasMode(Client, 'o')
&& Client_Conn(Client) > NONE))
{
if ((Conf_MaxListSize > 0)
&& IRC_CheckListTooBig(from, count,
Conf_MaxListSize,
"LIST"))
break;
if (!IRC_WriteStrClient(from,
RPL_LIST_MSG, Client_ID(from),
Channel_Name(chan),
Channel_MemberCount(chan),
Channel_Topic( chan )))
return DISCONNECTED;
count++;
}
}
chan = Channel_Next(chan);
}
/* Get next name ... */
if(Req->argc > 0)
pattern = strtok(NULL, ",");
else
pattern = NULL;
}
return IRC_WriteStrClient(from, RPL_LISTEND_MSG, Client_ID(from));
} /* IRC_LIST */
GLOBAL bool
IRC_TRACE( CLIENT *Client, REQUEST *Req )
{
CLIENT *from, *target, *c;
CONN_ID idx, idx2;
char user[CLIENT_USER_LEN];
assert( Client != NULL );
assert( Req != NULL );
/* Bad number of arguments? */
if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NORECIPIENT_MSG, Client_ID( Client ), Req->command );
/* Search sender */
if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
else from = Client;
if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
/* Search target */
if( Req->argc == 1 ) target = Client_Search( Req->argv[0] );
else target = Client_ThisServer( );
/* Forward command to other server? */
if( target != Client_ThisServer( ))
{
if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER )) return IRC_WriteStrClient( from, ERR_NOSUCHSERVER_MSG, Client_ID( from ), Req->argv[0] );
/* Send RPL_TRACELINK back to initiator */
idx = Client_Conn( Client ); assert( idx > NONE );
idx2 = Client_Conn( Client_NextHop( target )); assert( idx2 > NONE );
if( ! IRC_WriteStrClient( from, RPL_TRACELINK_MSG, Client_ID( from ), PACKAGE_NAME, PACKAGE_VERSION, Client_ID( target ), Client_ID( Client_NextHop( target )), Option_String( idx2 ), time( NULL ) - Conn_StartTime( idx2 ), Conn_SendQ( idx ), Conn_SendQ( idx2 ))) return DISCONNECTED;
/* Forward command */
IRC_WriteStrClientPrefix( target, from, "TRACE %s", Req->argv[0] );
return CONNECTED;
}
/* Infos about all connected servers */
c = Client_First( );
while( c )
{
if( Client_Conn( c ) > NONE )
{
/* Local client */
if( Client_Type( c ) == CLIENT_SERVER )
{
/* Server link */
strlcpy( user, Client_User( c ), sizeof( user ));
if( user[0] == '~' ) strlcpy( user, "unknown", sizeof( user ));
if( ! IRC_WriteStrClient( from, RPL_TRACESERVER_MSG, Client_ID( from ), Client_ID( c ), user, Client_Hostname( c ), Client_Mask( Client_ThisServer( )), Option_String( Client_Conn( c )))) return DISCONNECTED;
}
if(( Client_Type( c ) == CLIENT_USER ) && ( strchr( Client_Modes( c ), 'o' )))
{
/* IRC Operator */
if( ! IRC_WriteStrClient( from, RPL_TRACEOPERATOR_MSG, Client_ID( from ), Client_ID( c ))) return DISCONNECTED;
}
}
c = Client_Next( c );
}
IRC_SetPenalty( Client, 3 );
return IRC_WriteStrClient( from, RPL_TRACEEND_MSG, Client_ID( from ), Conf_ServerName, PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_DebugLevel );
} /* IRC_TRACE */
/**
* Kill an client identified by its nick name.
*
* Please note that after killig a client, its CLIENT cond CONNECTION
* structures are invalid. So the caller must make sure on its own not to
* access data of probably killed clients after calling this function!
*
* @param Client The client from which the command leading to the KILL has
* been received, or NULL. The KILL will no be forwarded in this
* direction. Only relevant when From is set, too.
* @param From The client from which the command originated, or NULL for
the local server.
* @param Nick The nick name to kill.
* @param Reason Text to send as reason to the client and other servers.
*/
GLOBAL bool
IRC_KillClient(CLIENT *Client, CLIENT *From, const char *Nick, const char *Reason)
{
const char *msg;
CONN_ID my_conn = NONE, conn;
CLIENT *c;
assert(Nick != NULL);
assert(Reason != NULL);
/* Do we know such a client in the network? */
c = Client_Search(Nick);
if (!c) {
LogDebug("Client with nick \"%s\" is unknown, not forwaring.", Nick);
return CONNECTED;
}
if (Client_Type(c) != CLIENT_USER && Client_Type(c) != CLIENT_GOTNICK
&& Client_Type(c) != CLIENT_SERVICE) {
/* Target of this KILL is not a regular user, this is
* invalid! So we ignore this case if we received a
* regular KILL from the network and try to kill the
* client/connection anyway (but log an error!) if the
* origin is the local server. */
if (Client != Client_ThisServer()) {
/* Invalid KILL received from remote */
if (Client_Type(c) == CLIENT_SERVER)
msg = ERR_CANTKILLSERVER_MSG;
else
msg = ERR_NOPRIVILEGES_MSG;
return IRC_WriteErrClient(Client, msg, Client_ID(Client));
}
Log(LOG_ERR,
"Got KILL for invalid client type: %d, \"%s\"!",
Client_Type(c), Nick);
}
/* Inform other servers */
IRC_WriteStrServersPrefix(From ? Client : NULL,
From ? From : Client_ThisServer(),
"KILL %s :%s", Nick, Reason);
/* Save ID of this connection */
if (Client)
my_conn = Client_Conn(Client);
/* Kill the client NOW:
* - Close the local connection (if there is one),
* - Destroy the CLIENT structure for remote clients.
* Note: Conn_Close() removes the CLIENT structure as well. */
conn = Client_Conn(c);
if(conn > NONE)
Conn_Close(conn, NULL, Reason, true);
else
Client_Destroy(c, NULL, Reason, false);
/* Are we still connected or were we killed, too? */
if (my_conn > NONE && Conn_GetClient(my_conn))
return CONNECTED;
else
return DISCONNECTED;
}
/*
* Handler for the IRC "TRACE" command.
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @return CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_TRACE(CLIENT *Client, REQUEST *Req)
{
CLIENT *from, *target, *c;
CONN_ID idx, idx2;
char user[CLIENT_USER_LEN];
assert(Client != NULL);
assert(Req != NULL);
_IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
_IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 0, from)
/* Forward command to other server? */
if (target != Client_ThisServer()) {
/* Send RPL_TRACELINK back to initiator */
idx = Client_Conn(Client);
assert(idx > NONE);
idx2 = Client_Conn(Client_NextHop(target));
assert(idx2 > NONE);
if (!IRC_WriteStrClient(from, RPL_TRACELINK_MSG,
Client_ID(from), PACKAGE_NAME,
PACKAGE_VERSION, Client_ID(target),
Client_ID(Client_NextHop(target)),
Option_String(idx2),
(long)(time(NULL) - Conn_StartTime(idx2)),
Conn_SendQ(idx), Conn_SendQ(idx2)))
return DISCONNECTED;
/* Forward command */
IRC_WriteStrClientPrefix(target, from, "TRACE %s", Req->argv[0]);
return CONNECTED;
}
/* Infos about all connected servers */
c = Client_First();
while (c) {
if (Client_Conn(c) > NONE) {
/* Local client */
if (Client_Type(c) == CLIENT_SERVER) {
/* Server link */
strlcpy(user, Client_User(c), sizeof(user));
if (user[0] == '~')
strlcpy(user, "unknown", sizeof(user));
if (!IRC_WriteStrClient(from,
RPL_TRACESERVER_MSG,
Client_ID(from), Client_ID(c),
user, Client_Hostname(c),
Client_Mask(Client_ThisServer()),
Option_String(Client_Conn(c))))
return DISCONNECTED;
}
if (Client_Type(c) == CLIENT_USER
&& Client_HasMode(c, 'o')) {
/* IRC Operator */
if (!IRC_WriteStrClient(from,
RPL_TRACEOPERATOR_MSG,
Client_ID(from), Client_ID(c)))
return DISCONNECTED;
}
}
c = Client_Next( c );
}
return IRC_WriteStrClient(from, RPL_TRACEEND_MSG, Client_ID(from),
Conf_ServerName, PACKAGE_NAME,
PACKAGE_VERSION, NGIRCd_DebugLevel);
} /* IRC_TRACE */
/**
* Handler for the IRC "JOIN" command.
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @return CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_JOIN( CLIENT *Client, REQUEST *Req )
{
char *channame, *key = NULL, *flags, *lastkey = NULL, *lastchan = NULL;
CLIENT *target;
CHANNEL *chan;
assert (Client != NULL);
assert (Req != NULL);
_IRC_GET_SENDER_OR_RETURN_(target, Req, Client)
/* Is argument "0"? */
if (Req->argc == 1 && !strncmp("0", Req->argv[0], 2))
return part_from_all_channels(Client, target);
/* Are channel keys given? */
if (Req->argc > 1)
key = strtok_r(Req->argv[1], ",", &lastkey);
channame = Req->argv[0];
channame = strtok_r(channame, ",", &lastchan);
/* Make sure that "channame" is not the empty string ("JOIN :") */
if (!channame)
return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
while (channame) {
flags = NULL;
/* Did the server include channel-user-modes? */
if (Client_Type(Client) == CLIENT_SERVER) {
flags = strchr(channame, 0x7);
if (flags) {
*flags = '\0';
flags++;
}
}
chan = Channel_Search(channame);
/* Local client? */
if (Client_Type(Client) == CLIENT_USER) {
if (chan) {
/* Already existing channel: already member? */
if (Channel_IsMemberOf(chan, Client))
goto join_next;
} else {
/* Channel must be created */
if (!strchr(Conf_AllowedChannelTypes, channame[0])) {
/* ... but channel type is not allowed! */
IRC_WriteErrClient(Client,
ERR_NOSUCHCHANNEL_MSG,
Client_ID(Client), channame);
goto join_next;
}
}
/* Test if the user has reached the channel limit */
if ((Conf_MaxJoins > 0) &&
(Channel_CountForUser(Client) >= Conf_MaxJoins)) {
if (!IRC_WriteErrClient(Client,
ERR_TOOMANYCHANNELS_MSG,
Client_ID(Client), channame))
return DISCONNECTED;
goto join_next;
}
if (chan) {
/* Already existing channel: check if the
* client is allowed to join */
if (!join_allowed(Client, chan, channame, key))
goto join_next;
} else {
/* New channel: first user will become channel
* operator unless this is a modeless channel */
if (*channame != '+')
flags = "o";
}
/* Local client: update idle time */
Conn_UpdateIdle(Client_Conn(Client));
} else {
/* Remote server: we don't need to know whether the
* client is invited or not, but we have to make sure
* that the "one shot" entries (generated by INVITE
* commands) in this list become deleted when a user
* joins a channel this way. */
if (chan)
(void)Lists_Check(Channel_GetListInvites(chan),
target);
}
/* Join channel (and create channel if it doesn't exist) */
if (!Channel_Join(target, channame))
goto join_next;
if (!chan) { /* channel is new; it has been created above */
chan = Channel_Search(channame);
assert(chan != NULL);
if (Channel_IsModeless(chan)) {
Channel_ModeAdd(chan, 't'); /* /TOPIC not allowed */
Channel_ModeAdd(chan, 'n'); /* no external msgs */
}
}
assert(chan != NULL);
join_set_channelmodes(chan, target, flags);
join_forward(Client, target, chan, channame);
if (!join_send_topic(Client, target, chan, channame))
break; /* write error */
join_next:
/* next channel? */
channame = strtok_r(NULL, ",", &lastchan);
if (channame && key)
key = strtok_r(NULL, ",", &lastkey);
}
return CONNECTED;
} /* IRC_JOIN */