/*
* 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 (strchr(Channel_UserModes(Chan, From), 'v'))
has_voice = true;
if (strchr(Channel_UserModes(Chan, From), 'h'))
is_halfop = true;
if (strchr(Channel_UserModes(Chan, From), 'o'))
is_op = true;
if (strchr(Channel_UserModes(Chan, From), 'a'))
is_chanadmin = true;
if (strchr(Channel_UserModes(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 (strchr(Channel_Modes(Chan), 'n') && !is_member)
return false;
if (strchr(Channel_Modes(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 (strchr(Channel_Modes(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 (!strchr(Channel_Modes(c), 's')
|| Channel_IsMemberOf(c, Client))
count++;
} else
count++;
c = c->next;
}
return count;
}
GLOBAL bool
Channel_Write(CHANNEL *Chan, CLIENT *From, CLIENT *Client, const char *Command,
bool SendErrors, const char *Text)
{
if (!Can_Send_To_Channel(Chan, From)) {
if (! SendErrors)
return CONNECTED; /* no error, see RFC 2812 */
if (strchr(Channel_Modes(Chan), 'M'))
return IRC_WriteStrClient(From, ERR_NEEDREGGEDNICK_MSG,
Client_ID(From), Channel_Name(Chan));
else
return IRC_WriteStrClient(From, ERR_CANNOTSENDTOCHAN_MSG,
Client_ID(From), Channel_Name(Chan));
}
if (Client_Conn(From) > NONE)
Conn_UpdateIdle(Client_Conn(From));
return IRC_WriteStrChannelPrefix(Client, Chan, From, true,
"%s %s :%s", Command, Channel_Name(Chan), Text);
}
/**
* Send CHANINFO commands to a new server (inform it about existing channels).
* @param Client New server
* @param Chan Channel
*/
static bool
Send_CHANINFO(CLIENT * Client, CHANNEL * Chan)
{
char *modes, *topic;
bool has_k, has_l;
#ifdef DEBUG
Log(LOG_DEBUG, "Sending CHANINFO commands for \"%s\" ...",
Channel_Name(Chan));
#endif
modes = Channel_Modes(Chan);
topic = Channel_Topic(Chan);
if (!*modes && !*topic)
return CONNECTED;
has_k = Channel_HasMode(Chan, 'k');
has_l = Channel_HasMode(Chan, 'l');
/* send CHANINFO */
if (!has_k && !has_l) {
if (!*topic) {
/* "CHANINFO <chan> +<modes>" */
return IRC_WriteStrClient(Client, "CHANINFO %s +%s",
Channel_Name(Chan), modes);
}
/* "CHANINFO <chan> +<modes> :<topic>" */
return IRC_WriteStrClient(Client, "CHANINFO %s +%s :%s",
Channel_Name(Chan), modes, topic);
}
/* "CHANINFO <chan> +<modes> <key> <limit> :<topic>" */
return IRC_WriteStrClient(Client, "CHANINFO %s +%s %s %lu :%s",
Channel_Name(Chan), modes,
has_k ? Channel_Key(Chan) : "*",
has_l ? Channel_MaxUsers(Chan) : 0, topic);
} /* Send_CHANINFO */
/**
* 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;
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 */
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( ! strchr( Channel_Modes( Chan ), 'P' ))
{
if( ! Get_First_Cl2Chan( NULL, Chan )) Delete_Channel( Chan );
}
return true;
} /* Remove_Client */
/**
* 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 */
