/**
* Acknowledge user JOIN request and send "channel info" numerics.
*
* @param Client Client used to prefix the genrated commands
* @param target Forward commands/numerics to this user
* @param chan Channel structure
* @param channame Channel name
*/
static bool
join_send_topic(CLIENT *Client, CLIENT *target, CHANNEL *chan,
const char *channame)
{
const char *topic;
if (Client_Type(Client) != CLIENT_USER)
return true;
/* acknowledge join */
if (!IRC_WriteStrClientPrefix(Client, target, "JOIN :%s", channame))
return false;
/* Send topic to client, if any */
topic = Channel_Topic(chan);
assert(topic != NULL);
if (*topic) {
if (!IRC_WriteStrClient(Client, RPL_TOPIC_MSG,
Client_ID(Client), channame, topic))
return false;
#ifndef STRICT_RFC
if (!IRC_WriteStrClient(Client, RPL_TOPICSETBY_MSG,
Client_ID(Client), channame,
Channel_TopicWho(chan),
Channel_TopicTime(chan)))
return false;
#endif
}
/* send list of channel members to client */
if (!IRC_Send_NAMES(Client, chan))
return false;
return IRC_WriteStrClient(Client, RPL_ENDOFNAMES_MSG, Client_ID(Client),
Channel_Name(chan));
} /* join_send_topic */
/**
* Part client from channel.
* This function lets a client part from a channel. First, the function checks
* if the channel exists and the client is a member of it and sends out
* appropriate error messages if not. The real work is done by the function
* Remove_Client().
*/
GLOBAL bool
Channel_Part(CLIENT * Client, CLIENT * Origin, const char *Name, const char *Reason)
{
CHANNEL *chan;
assert(Client != NULL);
assert(Name != NULL);
assert(Reason != NULL);
/* Check that specified channel exists */
chan = Channel_Search(Name);
if (!chan) {
IRC_WriteStrClient(Client, ERR_NOSUCHCHANNEL_MSG,
Client_ID(Client), Name);
return false;
}
/* Check that the client is in the channel */
if (!Get_Cl2Chan(chan, Client)) {
IRC_WriteStrClient(Client, ERR_NOTONCHANNEL_MSG,
Client_ID(Client), Name);
return false;
}
if (Conf_MorePrivacy)
Reason = "";
/* Part client from channel */
if (!Remove_Client(REMOVE_PART, chan, Client, Origin, Reason, true))
return false;
else
return true;
} /* Channel_Part */
/**
* Send help for a given topic to the client.
*
* @param Client The client requesting help.
* @param Topic The help topic requested.
* @return CONNECTED or DISCONNECTED.
*/
static bool
Help(CLIENT *Client, const char *Topic)
{
char *line;
size_t helptext_len, len_str, idx_start, lines = 0;
bool in_article = false;
assert(Client != NULL);
assert(Topic != NULL);
helptext_len = array_bytes(&Conf_Helptext);
line = array_start(&Conf_Helptext);
while (helptext_len > 0) {
len_str = strlen(line) + 1;
assert(helptext_len >= len_str);
helptext_len -= len_str;
if (in_article) {
/* The first character in each article text line must
* be a TAB (ASCII 9) character which will be stripped
* in the output. If it is not a TAB, the end of the
* article has been reached. */
if (line[0] != '\t') {
if (lines > 0)
return CONNECTED;
else
break;
}
/* A single '.' character indicates an empty line */
if (line[1] == '.' && line[2] == '\0')
idx_start = 2;
else
idx_start = 1;
if (!IRC_WriteStrClient(Client, "NOTICE %s :%s",
Client_ID(Client),
&line[idx_start]))
return DISCONNECTED;
lines++;
} else {
if (line[0] == '-' && line[1] == ' '
&& strcasecmp(&line[2], Topic) == 0)
in_article = true;
}
line += len_str;
}
/* Help topic not found (or empty)! */
if (!IRC_WriteStrClient(Client, "NOTICE %s :No help for \"%s\" found!",
Client_ID(Client), Topic))
return DISCONNECTED;
return CONNECTED;
}
/**
* Finish client registration.
*
* Introduce the new client to the network and send all "hello messages"
* to it after authentication has been succeeded.
*
* @param Client The client logging in.
* @return CONNECTED or DISCONNECTED.
*/
GLOBAL bool
Login_User_PostAuth(CLIENT *Client)
{
REQUEST Req;
char modes[CLIENT_MODE_LEN + 1];
assert(Client != NULL);
if (Class_HandleServerBans(Client) != CONNECTED)
return DISCONNECTED;
Client_Introduce(NULL, Client, CLIENT_USER);
if (!IRC_WriteStrClient
(Client, RPL_WELCOME_MSG, Client_ID(Client), Client_Mask(Client)))
return false;
if (!IRC_WriteStrClient
(Client, RPL_YOURHOST_MSG, Client_ID(Client),
Client_ID(Client_ThisServer()), PACKAGE_VERSION, HOST_CPU,
HOST_VENDOR, HOST_OS))
return false;
if (!IRC_WriteStrClient
(Client, RPL_CREATED_MSG, Client_ID(Client), NGIRCd_StartStr))
return false;
if (!IRC_WriteStrClient
(Client, RPL_MYINFO_MSG, Client_ID(Client),
Client_ID(Client_ThisServer()), PACKAGE_VERSION, USERMODES,
CHANMODES))
return false;
/* Features supported by this server (005 numeric, ISUPPORT),
* see <http://www.irc.org/tech_docs/005.html> for details. */
if (!IRC_Send_ISUPPORT(Client))
return DISCONNECTED;
if (!IRC_Send_LUSERS(Client))
return DISCONNECTED;
if (!IRC_Show_MOTD(Client))
return DISCONNECTED;
/* Set default user modes */
if (Conf_DefaultUserModes[0]) {
snprintf(modes, sizeof(modes), "+%s", Conf_DefaultUserModes);
Req.prefix = Client_ID(Client_ThisServer());
Req.command = "MODE";
Req.argc = 2;
Req.argv[0] = Client_ID(Client);
Req.argv[1] = modes;
IRC_MODE(Client, &Req);
} else
IRC_SetPenalty(Client, 1);
return CONNECTED;
}
/*
* 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;
}
/**
* Handler for the IRC "HELP" 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_HELP(CLIENT *Client, REQUEST *Req)
{
COMMAND *cmd;
assert(Client != NULL);
assert(Req != NULL);
if ((Req->argc == 0 && array_bytes(&Conf_Helptext) > 0)
|| (Req->argc >= 1 && strcasecmp(Req->argv[0], "Commands") != 0)) {
/* Help text available and requested */
if (Req->argc >= 1)
return Help(Client, Req->argv[0]);
if (!Help(Client, "Intro"))
return DISCONNECTED;
return CONNECTED;
}
cmd = Parse_GetCommandStruct();
while(cmd->name) {
if (!IRC_WriteStrClient(Client, "NOTICE %s :%s",
Client_ID(Client), cmd->name))
return DISCONNECTED;
cmd++;
}
return CONNECTED;
} /* IRC_HELP */
/**
* Join Channel
* This function lets a client join a channel. First, the function
* checks that the specified channel name is valid and that the client
* isn't already a member. If the specified channel doesn't exist,
* a new channel is created. Client is added to channel by function
* Add_Client().
*/
GLOBAL bool
Channel_Join( CLIENT *Client, const char *Name )
{
CHANNEL *chan;
assert(Client != NULL);
assert(Name != NULL);
/* Check that the channel name is valid */
if (! Channel_IsValidName(Name)) {
IRC_WriteStrClient(Client, ERR_NOSUCHCHANNEL_MSG,
Client_ID(Client), Name);
return false;
}
chan = Channel_Search(Name);
if(chan) {
/* Check if the client is already in the channel */
if (Get_Cl2Chan(chan, Client))
return false;
} else {
/* If the specified channel does not exist, the channel
* is now created */
chan = Channel_Create(Name);
if (!chan)
return false;
}
/* Add user to Channel */
if (! Add_Client(chan, Client))
return false;
return true;
} /* Channel_Join */
/**
* 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;
}
/**
* Announce new server in the network
* @param Client New server
* @param Server Existing server in the network
*/
static bool
Announce_Server(CLIENT * Client, CLIENT * Server)
{
CLIENT *c;
if (Client_Conn(Server) > NONE) {
/* Announce the new server to the one already registered
* which is directly connected to the local server */
if (!IRC_WriteStrClient
(Server, "SERVER %s %d %d :%s", Client_ID(Client),
Client_Hops(Client) + 1, Client_MyToken(Client),
Client_Info(Client)))
return DISCONNECTED;
}
if (Client_Hops(Server) == 1)
c = Client_ThisServer();
else
c = Client_TopServer(Server);
/* Inform new server about the one already registered in the network */
return IRC_WriteStrClientPrefix(Client, c, "SERVER %s %d %d :%s",
Client_ID(Server), Client_Hops(Server) + 1,
Client_MyToken(Server), Client_Info(Server));
} /* Announce_Server */
/**
* Handler for the "CAP LIST" command.
*
* @param Client The client from which this command has been received.
* @param Arg Command argument or NULL.
* @returns CONNECTED or DISCONNECTED.
*/
bool
Handle_CAP_LIST(CLIENT *Client, UNUSED char *Arg)
{
assert(Client != NULL);
return IRC_WriteStrClient(Client, "CAP %s LIST :%s", Client_ID(Client),
Get_CAP_String(Client_Cap(Client)));
}
/**
* 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_WriteStrClient(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))
return CONNECTED;
break;
case 'b':
if (!Channel_AddBan(Channel, mask))
return CONNECTED;
break;
case 'e':
if (!Channel_AddExcept(Channel, mask))
return CONNECTED;
break;
}
return Send_ListChange(true, what, Prefix, Client, Channel, mask);
}
/**
* Handler for the "CAP LS" command.
*
* @param Client The client from which this command has been received.
* @param Arg Command argument or NULL.
* @returns CONNECTED or DISCONNECTED.
*/
bool
Handle_CAP_LS(CLIENT *Client, UNUSED char *Arg)
{
assert(Client != NULL);
Set_CAP_Negotiation(Client);
return IRC_WriteStrClient(Client,
"CAP %s LS :multi-prefix",
Client_ID(Client));
}
/**
* Handler for the "CAP REQ" command.
*
* @param Client The client from which this command has been received.
* @param Arg Command argument.
* @returns CONNECTED or DISCONNECTED.
*/
bool
Handle_CAP_REQ(CLIENT *Client, char *Arg)
{
int new_cap;
assert(Client != NULL);
assert(Arg != NULL);
Set_CAP_Negotiation(Client);
new_cap = Parse_CAP(Client_Cap(Client), Arg);
if (new_cap < 0)
return IRC_WriteStrClient(Client, "CAP %s NAK :%s",
Client_ID(Client), Arg);
Client_CapSet(Client, new_cap);
return IRC_WriteStrClient(Client, "CAP %s ACK :%s",
Client_ID(Client), Arg);
}
/**
* Handler for the IRC "WEBIRC" command.
*
* See doc/Protocol.txt, section II.4:
* "Update webchat/proxy client information".
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @returns CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_WEBIRC(CLIENT *Client, REQUEST *Req)
{
/* Exactly 4 parameters are requited */
if (Req->argc != 4)
return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
if (!Conf_WebircPwd[0] || strcmp(Req->argv[0], Conf_WebircPwd) != 0)
return IRC_WriteStrClient(Client, ERR_PASSWDMISMATCH_MSG,
Client_ID(Client));
LogDebug("Connection %d: got valid WEBIRC command: user=%s, host=%s, ip=%s",
Client_Conn(Client), Req->argv[1], Req->argv[2], Req->argv[3]);
Client_SetUser(Client, Req->argv[1], true);
Client_SetOrigUser(Client, Req->argv[1]);
Client_SetHostname(Client, Req->argv[2]);
return CONNECTED;
} /* IRC_WEBIRC */
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);
}
GLOBAL bool
IRC_HELP( CLIENT *Client, REQUEST *Req )
{
COMMAND *cmd;
assert( Client != NULL );
assert( Req != NULL );
/* Bad number of arguments? */
if( Req->argc > 0 ) return IRC_WriteStrClient( Client, ERR_NORECIPIENT_MSG, Client_ID( Client ), Req->command );
cmd = Parse_GetCommandStruct( );
while( cmd->name )
{
if( ! IRC_WriteStrClient( Client, "NOTICE %s :%s", Client_ID( Client ), cmd->name )) return DISCONNECTED;
cmd++;
}
IRC_SetPenalty( Client, 2 );
return CONNECTED;
} /* IRC_HELP */
static bool
ShowChannelList(struct list_head *head, CLIENT *Client, CHANNEL *Channel,
char *msg, char *msg_end)
{
struct list_elem *e;
assert (Client != NULL);
assert (Channel != NULL);
e = Lists_GetFirst(head);
while (e) {
if (!IRC_WriteStrClient(Client, msg, Client_ID(Client),
Channel_Name(Channel),
Lists_GetMask(e)))
return DISCONNECTED;
e = Lists_GetNext(e);
}
return IRC_WriteStrClient(Client, msg_end, Client_ID(Client),
Channel_Name(Channel));
}
/**
* Handler for the IRC "AWAY" 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_AWAY( CLIENT *Client, REQUEST *Req )
{
assert (Client != NULL);
assert (Req != NULL);
if (Req->argc == 1 && Req->argv[0][0]) {
Client_SetAway(Client, Req->argv[0]);
Client_ModeAdd(Client, 'a');
IRC_WriteStrServersPrefix(Client, Client, "MODE %s :+a",
Client_ID( Client));
return IRC_WriteStrClient(Client, RPL_NOWAWAY_MSG,
Client_ID( Client));
} else {
Client_ModeDel(Client, 'a');
IRC_WriteStrServersPrefix(Client, Client, "MODE %s :-a",
Client_ID( Client));
return IRC_WriteStrClient(Client, RPL_UNAWAY_MSG,
Client_ID( Client));
}
} /* IRC_AWAY */
static bool
try_kick(CLIENT *peer, CLIENT* from, const char *nick, const char *channel,
const char *reason)
{
CLIENT *target = Client_Search(nick);
if (!target)
return IRC_WriteStrClient(from, ERR_NOSUCHNICK_MSG, Client_ID(from), nick);
Channel_Kick(peer, target, from, channel, reason);
return true;
}
/**
* Handler for the IRC "MODE" command.
*
* See RFC 2812 section 3.1.5 ("user mode message") and section 3.2.3
* ("channel mode message"), and RFC 2811 section 4 ("channel modes").
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @returns CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_MODE( CLIENT *Client, REQUEST *Req )
{
CLIENT *cl, *origin;
CHANNEL *chan;
assert(Client != NULL);
assert(Req != NULL);
/* No parameters? */
if (Req->argc < 1)
return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
/* Origin for answers */
if (Client_Type(Client) == CLIENT_SERVER) {
origin = Client_Search(Req->prefix);
if (!origin)
return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
Client_ID(Client),
Req->prefix);
} else
origin = Client;
/* Channel or user mode? */
cl = NULL; chan = NULL;
if (Client_IsValidNick(Req->argv[0]))
cl = Client_Search(Req->argv[0]);
if (Channel_IsValidName(Req->argv[0]))
chan = Channel_Search(Req->argv[0]);
if (cl)
return Client_Mode(Client, Req, origin, cl);
if (chan)
return Channel_Mode(Client, Req, origin, chan);
/* No target found! */
return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
Client_ID(Client), Req->argv[0]);
} /* IRC_MODE */
/**
* Handler for the IRC "QUIT" command.
*
* See RFC 2812, 3.1.7 "Quit", and RFC 2813, 4.1.5 "Quit".
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @returns CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_QUIT( CLIENT *Client, REQUEST *Req )
{
CLIENT *target;
char quitmsg[LINE_LEN];
assert(Client != NULL);
assert(Req != NULL);
/* Wrong number of arguments? */
if (Req->argc > 1)
return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
if (Req->argc == 1)
strlcpy(quitmsg, Req->argv[0], sizeof quitmsg);
if (Client_Type(Client) == CLIENT_SERVER) {
/* Server */
target = Client_Search(Req->prefix);
if (!target) {
Log(LOG_WARNING,
"Got QUIT from %s for unknown client!?",
Client_ID(Client));
return CONNECTED;
}
if (target != Client) {
Client_Destroy(target, "Got QUIT command.",
Req->argc == 1 ? quitmsg : NULL, true);
return CONNECTED;
} else {
Conn_Close(Client_Conn(Client), "Got QUIT command.",
Req->argc == 1 ? quitmsg : NULL, true);
return DISCONNECTED;
}
} else {
if (Req->argc == 1 && quitmsg[0] != '\"') {
/* " " to avoid confusion */
strlcpy(quitmsg, "\"", sizeof quitmsg);
strlcat(quitmsg, Req->argv[0], sizeof quitmsg-1);
strlcat(quitmsg, "\"", sizeof quitmsg );
}
/* User, Service, or not yet registered */
Conn_Close(Client_Conn(Client), "Got QUIT command.",
Req->argc == 1 ? quitmsg : NULL, true);
return DISCONNECTED;
}
} /* IRC_QUIT */
/**
* Handler for the "CAP CLEAR" command.
*
* @param Client The client from which this command has been received.
* @returns CONNECTED or DISCONNECTED.
*/
bool
Handle_CAP_CLEAR(CLIENT *Client)
{
int cap_old;
assert(Client != NULL);
cap_old = Client_Cap(Client);
if (cap_old & CLIENT_CAP_MULTI_PREFIX)
Client_CapDel(Client, CLIENT_CAP_MULTI_PREFIX);
return IRC_WriteStrClient(Client, "CAP %s ACK :%s", Client_ID(Client),
Get_CAP_String(cap_old));
}
/**
* 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 */
/**
* Handler for the IRCv3 "CAP" command.
*
* @param Client The client from which this command has been received.
* @param Req Request structure with prefix and all parameters.
* @returns CONNECTED or DISCONNECTED.
*/
GLOBAL bool
IRC_CAP(CLIENT *Client, REQUEST *Req)
{
assert(Client != NULL);
assert(Req != NULL);
/* Bad number of prameters? */
if (Req->argc < 1 || Req->argc > 2)
return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
Client_ID(Client), Req->command);
LogDebug("Got \"%s %s\" command from \"%s\" ...",
Req->command, Req->argv[0], Client_ID(Client));
if (Req->argc == 1) {
if (strcasecmp(Req->argv[0], "CLEAR") == 0)
return Handle_CAP_CLEAR(Client);
if (strcasecmp(Req->argv[0], "END") == 0)
return Handle_CAP_END(Client);
}
if (Req->argc >= 1 && Req->argc <= 2) {
if (strcasecmp(Req->argv[0], "LS") == 0)
return Handle_CAP_LS(Client, Req->argv[1]);
if (strcasecmp(Req->argv[0], "LIST") == 0)
return Handle_CAP_LIST(Client, Req->argv[1]);
}
if (Req->argc == 2) {
if (strcasecmp(Req->argv[0], "REQ") == 0)
return Handle_CAP_REQ(Client, Req->argv[1]);
if (strcasecmp(Req->argv[0], "ACK") == 0)
return Handle_CAP_ACK(Client, Req->argv[1]);
}
return IRC_WriteStrClient(Client, ERR_INVALIDCAP_MSG,
Client_ID(Client), Req->argv[0]);
}
/**
* Send a specific list to a remote server.
*/
static bool
Send_List(CLIENT *Client, CHANNEL *Chan, struct list_head *Head, char Type)
{
struct list_elem *elem;
elem = Lists_GetFirst(Head);
while (elem) {
if (!IRC_WriteStrClient(Client, "MODE %s +%c %s",
Channel_Name(Chan), Type,
Lists_GetMask(elem))) {
return DISCONNECTED;
}
elem = Lists_GetNext(elem);
}
return CONNECTED;
}
/**
* 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;
}
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 */
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 */
/**
* 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 */
/**
* 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 */
