/**
* Add entries to channel invite, ban and exception lists.
*
* @param what Can be 'I' for invite, 'b' for ban, and 'e' for exception list.
* @param Prefix The originator of the command.
* @param Client The sender of the command.
* @param Channel The channel of which the list should be modified.
* @param Pattern The pattern to add to the list.
* @return CONNECTED or DISCONNECTED.
*/
static bool
Add_To_List(char what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel,
const char *Pattern)
{
char mask[MASK_LEN];
struct list_head *list = NULL;
long int current_count;
assert(Client != NULL);
assert(Channel != NULL);
assert(Pattern != NULL);
assert(what == 'I' || what == 'b' || what == 'e');
Lists_MakeMask(Pattern, mask, sizeof(mask));
current_count = Lists_Count(Channel_GetListInvites(Channel))
+ Lists_Count(Channel_GetListExcepts(Channel))
+ Lists_Count(Channel_GetListBans(Channel));
switch(what) {
case 'I':
list = Channel_GetListInvites(Channel);
break;
case 'b':
list = Channel_GetListBans(Channel);
break;
case 'e':
list = Channel_GetListExcepts(Channel);
break;
}
if (Lists_CheckDupeMask(list, mask))
return CONNECTED;
if (Client_Type(Client) == CLIENT_USER &&
current_count >= MAX_HNDL_CHANNEL_LISTS)
return IRC_WriteErrClient(Client, ERR_LISTFULL_MSG,
Client_ID(Client),
Channel_Name(Channel), mask,
MAX_HNDL_CHANNEL_LISTS);
switch (what) {
case 'I':
if (!Channel_AddInvite(Channel, mask, false, Client_ID(Client)))
return CONNECTED;
break;
case 'b':
if (!Channel_AddBan(Channel, mask, Client_ID(Client)))
return CONNECTED;
break;
case 'e':
if (!Channel_AddExcept(Channel, mask, Client_ID(Client)))
return CONNECTED;
break;
}
return Send_ListChange(true, what, Prefix, Client, Channel, mask);
}
/**
* Delete entries from channel invite, ban and exception lists.
*
* @param what Can be 'I' for invite, 'b' for ban, and 'e' for exception list.
* @param Prefix The originator of the command.
* @param Client The sender of the command.
* @param Channel The channel of which the list should be modified.
* @param Pattern The pattern to add to the list.
* @return CONNECTED or DISCONNECTED.
*/
static bool
Del_From_List(char what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel,
const char *Pattern)
{
char mask[MASK_LEN];
struct list_head *list = NULL;
assert(Client != NULL);
assert(Channel != NULL);
assert(Pattern != NULL);
assert(what == 'I' || what == 'b' || what == 'e');
Lists_MakeMask(Pattern, mask, sizeof(mask));
switch (what) {
case 'I':
list = Channel_GetListInvites(Channel);
break;
case 'b':
list = Channel_GetListBans(Channel);
break;
case 'e':
list = Channel_GetListExcepts(Channel);
break;
}
if (!Lists_CheckDupeMask(list, mask))
return CONNECTED;
Lists_Del(list, mask);
return Send_ListChange(false, what, Prefix, Client, Channel, mask);
}
GLOBAL bool
Channel_AddBan(CHANNEL *c, const char *mask, const char *who )
{
struct list_head *h = Channel_GetListBans(c);
LogDebug("Adding \"%s\" to \"%s\" ban list", mask, Channel_Name(c));
return Lists_Add(h, mask, time(NULL), who, false);
}
/**
* Synchronize invite, ban, except, and G-Line lists between servers.
*
* @param Client New server.
* @return CONNECTED or DISCONNECTED.
*/
static bool
Synchronize_Lists(CLIENT * Client)
{
CHANNEL *c;
struct list_head *head;
struct list_elem *elem;
time_t t;
assert(Client != NULL);
/* g-lines */
head = Class_GetList(CLASS_GLINE);
elem = Lists_GetFirst(head);
while (elem) {
t = Lists_GetValidity(elem) - time(NULL);
if (!IRC_WriteStrClient(Client, "GLINE %s %ld :%s",
Lists_GetMask(elem),
t > 0 ? (long)t : 0,
Lists_GetReason(elem)))
return DISCONNECTED;
elem = Lists_GetNext(elem);
}
c = Channel_First();
while (c) {
if (!Send_List(Client, c, Channel_GetListExcepts(c), 'e'))
return DISCONNECTED;
if (!Send_List(Client, c, Channel_GetListBans(c), 'b'))
return DISCONNECTED;
if (!Send_List(Client, c, Channel_GetListInvites(c), 'I'))
return DISCONNECTED;
c = Channel_Next(c);
}
return CONNECTED;
}
GLOBAL bool
Channel_ShowBans( CLIENT *Client, CHANNEL *Channel )
{
struct list_head *h;
assert( Channel != NULL );
h = Channel_GetListBans(Channel);
return ShowChannelList(h, Client, Channel, RPL_BANLIST_MSG,
RPL_ENDOFBANLIST_MSG);
}
/**
* 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 */
/**
* 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 */
