/*
* Reply to a channel mode request.
*
* @param Origin The originator of the MODE command (prefix).
* @param Channel The channel of which the modes should be sent.
* @return CONNECTED or DISCONNECTED.
*/
static bool
Channel_Mode_Answer_Request(CLIENT *Origin, CHANNEL *Channel)
{
char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], argadd[CLIENT_PASS_LEN];
const char *mode_ptr;
if (!Channel_IsMemberOf(Channel, Origin)) {
/* Not a member: "simple" mode reply */
if (!IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
Client_ID(Origin), Channel_Name(Channel),
Channel_Modes(Channel)))
return DISCONNECTED;
} else {
/* The sender is a member: generate extended reply */
strlcpy(the_modes, Channel_Modes(Channel), sizeof(the_modes));
mode_ptr = the_modes;
the_args[0] = '\0';
while(*mode_ptr) {
switch(*mode_ptr) {
case 'l':
snprintf(argadd, sizeof(argadd), " %lu",
Channel_MaxUsers(Channel));
strlcat(the_args, argadd, sizeof(the_args));
break;
case 'k':
strlcat(the_args, " ", sizeof(the_args));
strlcat(the_args, Channel_Key(Channel),
sizeof(the_args));
break;
}
mode_ptr++;
}
if (the_args[0])
strlcat(the_modes, the_args, sizeof(the_modes));
if (!IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
Client_ID(Origin), Channel_Name(Channel),
the_modes))
return DISCONNECTED;
}
#ifndef STRICT_RFC
/* Channel creation time */
if (!IRC_WriteStrClient(Origin, RPL_CREATIONTIME_MSG,
Client_ID(Origin), Channel_Name(Channel),
Channel_CreationTime(Channel)))
return DISCONNECTED;
#endif
return CONNECTED;
}
/**
* Check if a client is allowed to send to a specific channel.
*
* @param Chan The channel to check.
* @param From The client that wants to send.
* @return true if the client is allowed to send, false otherwise.
*/
static bool
Can_Send_To_Channel(CHANNEL *Chan, CLIENT *From)
{
bool is_member, has_voice, is_halfop, is_op, is_chanadmin, is_owner;
is_member = has_voice = is_halfop = is_op = is_chanadmin = is_owner = false;
/* The server itself always can send messages :-) */
if (Client_ThisServer() == From)
return true;
if (Channel_IsMemberOf(Chan, From)) {
is_member = true;
if (Channel_UserHasMode(Chan, From, 'v'))
has_voice = true;
if (Channel_UserHasMode(Chan, From, 'h'))
is_halfop = true;
if (Channel_UserHasMode(Chan, From, 'o'))
is_op = true;
if (Channel_UserHasMode(Chan, From, 'a'))
is_chanadmin = true;
if (Channel_UserHasMode(Chan, From, 'q'))
is_owner = true;
}
/*
* Is the client allowed to write to channel?
*
* If channel mode n set: non-members cannot send to channel.
* If channel mode m set: need voice.
*/
if (Channel_HasMode(Chan, 'n') && !is_member)
return false;
if (Channel_HasMode(Chan, 'M') && !Client_HasMode(From, 'R')
&& !Client_HasMode(From, 'o'))
return false;
if (has_voice || is_halfop || is_op || is_chanadmin || is_owner)
return true;
if (Channel_HasMode(Chan, 'm'))
return false;
if (Lists_Check(&Chan->list_excepts, From))
return true;
return !Lists_Check(&Chan->list_bans, From);
}
/**
* Get number of channels this server knows and that are "visible" to
* the given client. If no client is given, all channels will be counted.
*
* @param Client The client to check or NULL.
* @return Number of channels visible to the client.
*/
GLOBAL unsigned long
Channel_CountVisible (CLIENT *Client)
{
CHANNEL *c;
unsigned long count = 0;
c = My_Channels;
while(c) {
if (Client) {
if (!Channel_HasMode(c, 's')
|| Channel_IsMemberOf(c, Client))
count++;
} else
count++;
c = c->next;
}
return count;
}
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 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 */
/**
* 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 */
/**
* 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 */
/**
* 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 "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 */
/**
* 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 "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 */
