/**
* Check if a client is listed in a list and store the reason.
*
* @param h List head.
* @param Client Client to check.
* @param reason Buffer to store the reason.
* @param len Size of the buffer if reason should be saved.
* @return true if client is listed, false if not.
*/
bool
Lists_CheckReason(struct list_head *h, CLIENT *Client, char *reason, size_t len)
{
struct list_elem *e, *last, *next;
assert(h != NULL);
e = h->first;
last = NULL;
while (e) {
next = e->next;
if (MatchCaseInsensitive(e->mask, Client_MaskCloaked(Client))) {
if (len && e->reason)
strlcpy(reason, e->reason, len);
if (e->onlyonce) {
/* Entry is valid only once, delete it */
LogDebug("Deleted \"%s\" from list (used).",
e->mask);
Lists_Unlink(h, last, e);
}
return true;
}
last = e;
e = next;
}
return false;
}
/**
* 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_GET_SENDER_OR_RETURN_(from, Req, Client)
/* Search user */
target = Client_Search(Req->argv[0]);
if (!target || (Client_Type(target) != CLIENT_USER))
return IRC_WriteErrClient(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_WriteErrClient(from, ERR_NOTONCHANNEL_MSG,
Client_ID(Client),
Req->argv[1]);
/* Is the channel "invite-disallow"? */
if (Channel_HasMode(chan, 'V'))
return IRC_WriteErrClient(from, ERR_NOINVITE_MSG,
Client_ID(from),
Channel_Name(chan));
/* Is the channel "invite-only"? */
if (Channel_HasMode(chan, 'i')) {
/* Yes. The user issuing the INVITE command must be
* channel owner/admin/operator/halfop! */
if (!Channel_UserHasMode(chan, from, 'q') &&
!Channel_UserHasMode(chan, from, 'a') &&
!Channel_UserHasMode(chan, from, 'o') &&
!Channel_UserHasMode(chan, from, 'h'))
return IRC_WriteErrClient(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_WriteErrClient(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_MaskCloaked(target),
true))
return CONNECTED;
}
}
LogDebug("User \"%s\" invites \"%s\" to \"%s\" ...", Client_Mask(from),
Req->argv[0], Req->argv[1]);
/*
* RFC 2812 states:
* '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 (Client_HasMode(target, 'a') &&
!IRC_WriteStrClient(from, RPL_AWAY_MSG, Client_ID(from),
Client_ID(target), Client_Away(target)))
return DISCONNECTED;
}
return CONNECTED;
} /* IRC_INVITE */