/*
* ngIRCd -- The Next Generation IRC Daemon
* Copyright (c)2001-2014 Alexander Barton (alex@barton.de) and Contributors.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* Please read the file COPYING, README and AUTHORS for more information.
*/
#define __channel_c__
#include "portab.h"
/**
* @file
* Channel management
*/
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <stdio.h>
#include <strings.h>
#include <time.h>
#include "conn-func.h"
#include "channel.h"
#include "irc-write.h"
#include "conf.h"
#include "hash.h"
#include "log.h"
#include "messages.h"
#include "match.h"
#include "parse.h"
#include "irc-mode.h"
#define REMOVE_PART 0
#define REMOVE_QUIT 1
#define REMOVE_KICK 2
static CHANNEL *My_Channels;
static CL2CHAN *My_Cl2Chan;
static CL2CHAN *Get_Cl2Chan PARAMS(( CHANNEL *Chan, CLIENT *Client ));
static CL2CHAN *Add_Client PARAMS(( CHANNEL *Chan, CLIENT *Client ));
static bool Remove_Client PARAMS(( int Type, CHANNEL *Chan, CLIENT *Client, CLIENT *Origin, const char *Reason, bool InformServer ));
static CL2CHAN *Get_First_Cl2Chan PARAMS(( CLIENT *Client, CHANNEL *Chan ));
static CL2CHAN *Get_Next_Cl2Chan PARAMS(( CL2CHAN *Start, CLIENT *Client, CHANNEL *Chan ));
static void Delete_Channel PARAMS(( CHANNEL *Chan ));
static void Free_Channel PARAMS(( CHANNEL *Chan ));
static void Set_KeyFile PARAMS((CHANNEL *Chan, const char *KeyFile));
GLOBAL void
Channel_Init( void )
{
My_Channels = NULL;
My_Cl2Chan = NULL;
} /* Channel_Init */
GLOBAL struct list_head *
Channel_GetListBans(CHANNEL *c)
{
assert(c != NULL);
return &c->list_bans;
}
GLOBAL struct list_head *
Channel_GetListExcepts(CHANNEL *c)
{
assert(c != NULL);
return &c->list_excepts;
}
GLOBAL struct list_head *
Channel_GetListInvites(CHANNEL *c)
{
assert(c != NULL);
return &c->list_invites;
}
/**
* Generate predefined persistent channels and &SERVER
*/
GLOBAL void
Channel_InitPredefined( void )
{
CHANNEL *new_chan;
REQUEST Req;
const struct Conf_Channel *conf_chan;
char *c;
char modes[COMMAND_LEN], name[CHANNEL_NAME_LEN];
size_t i, n, channel_count = array_length(&Conf_Channels, sizeof(*conf_chan));
conf_chan = array_start(&Conf_Channels);
assert(channel_count == 0 || conf_chan != NULL);
for (i = 0; i < channel_count; i++, conf_chan++) {
if (!conf_chan->name[0])
continue;
if (!Channel_IsValidName(conf_chan->name)) {
Log(LOG_ERR,
"Can't create pre-defined channel: invalid name: \"%s\"",
conf_chan->name);
continue;
}
new_chan = Channel_Search(conf_chan->name);
if (new_chan) {
Log(LOG_INFO,
"Can't create pre-defined channel \"%s\": name already in use.",
conf_chan->name);
Set_KeyFile(new_chan, conf_chan->keyfile);
continue;
}
new_chan = Channel_Create(conf_chan->name);
if (!new_chan) {
Log(LOG_ERR, "Can't create pre-defined channel \"%s\"!",
conf_chan->name);
continue;
}
Channel_ModeAdd(new_chan, 'P');
if (conf_chan->topic[0])
Channel_SetTopic(new_chan, NULL, conf_chan->topic);
/* Evaluate modes strings with fake requests */
if (conf_chan->modes_num) {
/* Prepare fake request structure */
strlcpy(name, conf_chan->name, sizeof(name));
Log(LOG_INFO, "Evaluating predefined channel modes for \"%s\".", name);
Req.argv[0] = name;
Req.prefix = Client_ID(Client_ThisServer());
Req.command = "MODE";
/* Iterate over channel modes strings */
for (n = 0; n < conf_chan->modes_num; n++) {
Req.argc = 1;
strlcpy(modes, conf_chan->modes[n], sizeof(modes));
Log(LOG_DEBUG, "Evaluate \"MODE %s %s\".", name, modes);
c = strtok(modes, " ");
while (c && Req.argc < 15) {
Req.argv[Req.argc++] = c;
c = strtok(0, " ");
}
if (Req.argc > 1) {
/* Handling of legacy "Key" and "MaxUsers" settings:
* Enforce setting the respective mode(s), to support
* the legacy "Mode = kl" notation, which was valid but
* is an invalid MODE string: key and limit are missing!
* So set them manually when "k" or "l" are detected in
* the first MODE parameter ... */
if (Req.argc > 1 && strchr(Req.argv[1], 'k')) {
Channel_SetKey(new_chan, conf_chan->key);
Channel_ModeAdd(new_chan, 'k');
}
if (strchr(Req.argv[1], 'l')) {
Channel_SetMaxUsers(new_chan, conf_chan->maxusers);
Channel_ModeAdd(new_chan, 'l');
}
IRC_MODE(Client_ThisServer(), &Req);
}
/* Original channel modes srings are no longer needed */
free(conf_chan->modes[n]);
}
}
Set_KeyFile(new_chan, conf_chan->keyfile);
Log(LOG_INFO,
"Created pre-defined channel \"%s\", mode \"%s\" (key \"%s\", limit %d).",
new_chan->name, new_chan->modes, new_chan->key,
new_chan->maxusers);
}
if (channel_count)
array_free(&Conf_Channels);
/* Make sure the local &SERVER channel exists */
if (!Channel_Search("&SERVER")) {
new_chan = Channel_Create("&SERVER");
if (new_chan) {
Channel_SetModes(new_chan, "mnPt");
Channel_SetTopic(new_chan, Client_ThisServer(),
"Server Messages");
} else
Log(LOG_ERR, "Failed to create \"&SERVER\" channel!");
} else
LogDebug("Required channel \"&SERVER\" already exists, ok.");
} /* Channel_InitPredefined */
static void
Free_Channel(CHANNEL *chan)
{
array_free(&chan->topic);
array_free(&chan->keyfile);
Lists_Free(&chan->list_bans);
Lists_Free(&chan->list_excepts);
Lists_Free(&chan->list_invites);
free(chan);
}
GLOBAL void
Channel_Exit( void )
{
CHANNEL *c, *c_next;
CL2CHAN *cl2chan, *cl2chan_next;
/* free struct Channel */
c = My_Channels;
while (c) {
c_next = c->next;
Free_Channel(c);
c = c_next;
}
/* Free Channel allocation table */
cl2chan = My_Cl2Chan;
while (cl2chan) {
cl2chan_next = cl2chan->next;
free(cl2chan);
cl2chan = cl2chan_next;
}
} /* Channel_Exit */
/**
* 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_WriteErrClient(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 */
/**
* 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_WriteErrClient(Client, ERR_NOSUCHCHANNEL_MSG,
Client_ID(Client), Name);
return false;
}
/* Check that the client is in the channel */
if (!Get_Cl2Chan(chan, Client)) {
IRC_WriteErrClient(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 */
/**
* 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 */
GLOBAL void
Channel_Quit( CLIENT *Client, const char *Reason )
{
CHANNEL *c, *next_c;
assert( Client != NULL );
assert( Reason != NULL );
if (Conf_MorePrivacy)
Reason = "";
IRC_WriteStrRelatedPrefix( Client, Client, false, "QUIT :%s", Reason );
c = My_Channels;
while( c )
{
next_c = c->next;
Remove_Client( REMOVE_QUIT, c, Client, Client, Reason, false );
c = next_c;
}
} /* Channel_Quit */
/**
* 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;
}
GLOBAL unsigned long
Channel_MemberCount( CHANNEL *Chan )
{
CL2CHAN *cl2chan;
unsigned long count = 0;
assert( Chan != NULL );
cl2chan = My_Cl2Chan;
while( cl2chan )
{
if( cl2chan->channel == Chan ) count++;
cl2chan = cl2chan->next;
}
return count;
} /* Channel_MemberCount */
GLOBAL int
Channel_CountForUser( CLIENT *Client )
{
/* Count number of channels a user is member of. */
CL2CHAN *cl2chan;
int count = 0;
assert( Client != NULL );
cl2chan = My_Cl2Chan;
while( cl2chan )
{
if( cl2chan->client == Client ) count++;
cl2chan = cl2chan->next;
}
return count;
} /* Channel_CountForUser */
GLOBAL const char *
Channel_Name( const CHANNEL *Chan )
{
assert( Chan != NULL );
return Chan->name;
} /* Channel_Name */
GLOBAL char *
Channel_Modes( CHANNEL *Chan )
{
assert( Chan != NULL );
return Chan->modes;
} /* Channel_Modes */
GLOBAL bool
Channel_HasMode( CHANNEL *Chan, char Mode )
{
assert( Chan != NULL );
return strchr( Chan->modes, Mode ) != NULL;
} /* Channel_HasMode */
GLOBAL char *
Channel_Key( CHANNEL *Chan )
{
assert( Chan != NULL );
return Chan->key;
} /* Channel_Key */
GLOBAL unsigned long
Channel_MaxUsers( CHANNEL *Chan )
{
assert( Chan != NULL );
return Chan->maxusers;
} /* Channel_MaxUsers */
GLOBAL CHANNEL *
Channel_First( void )
{
return My_Channels;
} /* Channel_First */
GLOBAL CHANNEL *
Channel_Next( CHANNEL *Chan )
{
assert( Chan != NULL );
return Chan->next;
} /* Channel_Next */
GLOBAL CHANNEL *
Channel_Search( const char *Name )
{
/* Search channel structure */
CHANNEL *c;
UINT32 search_hash;
assert( Name != NULL );
search_hash = Hash( Name );
c = My_Channels;
while( c )
{
if( search_hash == c->hash )
{
/* hash hit */
if( strcasecmp( Name, c->name ) == 0 ) return c;
}
c = c->next;
}
return NULL;
} /* Channel_Search */
GLOBAL CL2CHAN *
Channel_FirstMember( CHANNEL *Chan )
{
assert( Chan != NULL );
return Get_First_Cl2Chan( NULL, Chan );
} /* Channel_FirstMember */
GLOBAL CL2CHAN *
Channel_NextMember( CHANNEL *Chan, CL2CHAN *Cl2Chan )
{
assert( Chan != NULL );
assert( Cl2Chan != NULL );
return Get_Next_Cl2Chan( Cl2Chan->next, NULL, Chan );
} /* Channel_NextMember */
GLOBAL CL2CHAN *
Channel_FirstChannelOf( CLIENT *Client )
{
assert( Client != NULL );
return Get_First_Cl2Chan( Client, NULL );
} /* Channel_FirstChannelOf */
GLOBAL CL2CHAN *
Channel_NextChannelOf( CLIENT *Client, CL2CHAN *Cl2Chan )
{
assert( Client != NULL );
assert( Cl2Chan != NULL );
return Get_Next_Cl2Chan( Cl2Chan->next, Client, NULL );
} /* Channel_NextChannelOf */
GLOBAL CLIENT *
Channel_GetClient( CL2CHAN *Cl2Chan )
{
assert( Cl2Chan != NULL );
return Cl2Chan->client;
} /* Channel_GetClient */
GLOBAL CHANNEL *
Channel_GetChannel( CL2CHAN *Cl2Chan )
{
assert( Cl2Chan != NULL );
return Cl2Chan->channel;
} /* Channel_GetChannel */
GLOBAL bool
Channel_IsValidName( const char *Name )
{
assert( Name != NULL );
#ifdef STRICT_RFC
if (strlen(Name) <= 1)
return false;
#endif
if (strchr("#&+", Name[0]) == NULL)
return false;
if (strlen(Name) >= CHANNEL_NAME_LEN)
return false;
return Name[strcspn(Name, " ,:\007")] == 0;
} /* Channel_IsValidName */
GLOBAL bool
Channel_ModeAdd( CHANNEL *Chan, char Mode )
{
/* set Mode.
* If the channel already had this mode, return false.
* If the channel mode was newly set return true.
*/
char x[2];
assert( Chan != NULL );
x[0] = Mode; x[1] = '\0';
if( ! Channel_HasMode( Chan, x[0] ))
{
/* Channel does not have this mode yet, set it */
strlcat( Chan->modes, x, sizeof( Chan->modes ));
return true;
}
else return false;
} /* Channel_ModeAdd */
GLOBAL bool
Channel_ModeDel( CHANNEL *Chan, char Mode )
{
/* Delete mode.
* if the mode was removed return true.
* if the channel did not have the mode, return false.
*/
char *p;
assert( Chan != NULL );
p = strchr( Chan->modes, Mode );
if( ! p ) return false;
/* Channel has mode -> delete */
while( *p )
{
*p = *(p + 1);
p++;
}
return true;
} /* Channel_ModeDel */
GLOBAL bool
Channel_UserModeAdd( CHANNEL *Chan, CLIENT *Client, char Mode )
{
/* Set Channel-User-Mode.
* if mode was newly set, return true.
* if the User already had this channel-mode, return false.
*/
CL2CHAN *cl2chan;
char x[2];
assert( Chan != NULL );
assert( Client != NULL );
cl2chan = Get_Cl2Chan( Chan, Client );
assert( cl2chan != NULL );
x[0] = Mode; x[1] = '\0';
if( ! strchr( cl2chan->modes, x[0] ))
{
/* mode not set, -> set it */
strlcat( cl2chan->modes, x, sizeof( cl2chan->modes ));
return true;
}
else return false;
} /* Channel_UserModeAdd */
GLOBAL bool
Channel_UserModeDel( CHANNEL *Chan, CLIENT *Client, char Mode )
{
/* Delete Channel-User-Mode.
* If Mode was removed, return true.
* If User did not have the Channel-Mode, return false.
*/
CL2CHAN *cl2chan;
char *p;
assert( Chan != NULL );
assert( Client != NULL );
cl2chan = Get_Cl2Chan( Chan, Client );
assert( cl2chan != NULL );
p = strchr( cl2chan->modes, Mode );
if( ! p ) return false;
/* Client has Mode -> delete */
while( *p )
{
*p = *(p + 1);
p++;
}
return true;
} /* Channel_UserModeDel */
GLOBAL char *
Channel_UserModes( CHANNEL *Chan, CLIENT *Client )
{
/* return Users' Channel-Modes */
CL2CHAN *cl2chan;
assert( Chan != NULL );
assert( Client != NULL );
cl2chan = Get_Cl2Chan( Chan, Client );
assert( cl2chan != NULL );
return cl2chan->modes;
} /* Channel_UserModes */
GLOBAL bool
Channel_UserHasMode( CHANNEL *Chan, CLIENT *Client, char Mode )
{
return strchr(Channel_UserModes(Chan, Client), Mode) != NULL;
} /* Channel_UserHasMode */
GLOBAL bool
Channel_IsMemberOf( CHANNEL *Chan, CLIENT *Client )
{
/* Test if Client is on Channel Chan */
assert( Chan != NULL );
assert( Client != NULL );
return Get_Cl2Chan(Chan, Client) != NULL;
} /* Channel_IsMemberOf */
GLOBAL char *
Channel_Topic( CHANNEL *Chan )
{
char *ret;
assert( Chan != NULL );
ret = array_start(&Chan->topic);
return ret ? ret : "";
} /* Channel_Topic */
#ifndef STRICT_RFC
GLOBAL unsigned int
Channel_TopicTime(CHANNEL *Chan)
{
assert(Chan != NULL);
return (unsigned int) Chan->topic_time;
} /* Channel_TopicTime */
GLOBAL char *
Channel_TopicWho(CHANNEL *Chan)
{
assert(Chan != NULL);
return Chan->topic_who;
} /* Channel_TopicWho */
GLOBAL unsigned int
Channel_CreationTime(CHANNEL *Chan)
{
assert(Chan != NULL);
return (unsigned int) Chan->creation_time;
} /* Channel_CreationTime */
#endif
GLOBAL void
Channel_SetTopic(CHANNEL *Chan, CLIENT *Client, const char *Topic)
{
size_t len;
assert( Chan != NULL );
assert( Topic != NULL );
len = strlen(Topic);
if (len < array_bytes(&Chan->topic))
array_free(&Chan->topic);
if (len >= COMMAND_LEN || !array_copyb(&Chan->topic, Topic, len+1))
Log(LOG_WARNING, "could not set new Topic \"%s\" on %s: %s",
Topic, Chan->name, strerror(errno));
#ifndef STRICT_RFC
Chan->topic_time = time(NULL);
if (Client != NULL && Client_Type(Client) != CLIENT_SERVER)
strlcpy(Chan->topic_who, Client_ID(Client),
sizeof Chan->topic_who);
else
strlcpy(Chan->topic_who, DEFAULT_TOPIC_ID,
sizeof Chan->topic_who);
#else
(void) Client;
#endif
} /* Channel_SetTopic */
GLOBAL void
Channel_SetModes( CHANNEL *Chan, const char *Modes )
{
assert( Chan != NULL );
assert( Modes != NULL );
strlcpy( Chan->modes, Modes, sizeof( Chan->modes ));
} /* Channel_SetModes */
GLOBAL void
Channel_SetKey( CHANNEL *Chan, const char *Key )
{
assert( Chan != NULL );
assert( Key != NULL );
strlcpy( Chan->key, Key, sizeof( Chan->key ));
LogDebug("Channel %s: Key is now \"%s\".", Chan->name, Chan->key );
} /* Channel_SetKey */
GLOBAL void
Channel_SetMaxUsers(CHANNEL *Chan, unsigned long Count)
{
assert( Chan != NULL );
Chan->maxusers = Count;
LogDebug("Channel %s: Member limit is now %lu.", Chan->name, Chan->maxusers );
} /* Channel_SetMaxUsers */
/**
* 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);
}
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 (Channel_HasMode(Chan, 'M'))
return IRC_WriteErrClient(From, ERR_NEEDREGGEDNICK_MSG,
Client_ID(From), Channel_Name(Chan));
else
return IRC_WriteErrClient(From, ERR_CANNOTSENDTOCHAN_MSG,
Client_ID(From), Channel_Name(Chan));
}
if (Client_Conn(From) > NONE)
Conn_UpdateIdle(Client_Conn(From));
IRC_WriteStrChannelPrefix(Client, Chan, From, true, "%s %s :%s",
Command, Channel_Name(Chan), Text);
return CONNECTED;
}
GLOBAL CHANNEL *
Channel_Create( const char *Name )
{
/* Create new CHANNEL structure and add it to linked list */
CHANNEL *c;
assert( Name != NULL );
c = (CHANNEL *)malloc( sizeof( CHANNEL ));
if( ! c )
{
Log( LOG_EMERG, "Can't allocate memory! [New_Chan]" );
return NULL;
}
memset( c, 0, sizeof( CHANNEL ));
strlcpy( c->name, Name, sizeof( c->name ));
c->hash = Hash( c->name );
c->next = My_Channels;
#ifndef STRICT_RFC
c->creation_time = time(NULL);
#endif
My_Channels = c;
LogDebug("Created new channel structure for \"%s\".", Name);
return c;
} /* Channel_Create */
static CL2CHAN *
Get_Cl2Chan( CHANNEL *Chan, CLIENT *Client )
{
CL2CHAN *cl2chan;
assert( Chan != NULL );
assert( Client != NULL );
cl2chan = My_Cl2Chan;
while( cl2chan )
{
if(( cl2chan->channel == Chan ) && ( cl2chan->client == Client )) return cl2chan;
cl2chan = cl2chan->next;
}
return NULL;
} /* Get_Cl2Chan */
static CL2CHAN *
Add_Client( CHANNEL *Chan, CLIENT *Client )
{
CL2CHAN *cl2chan;
assert( Chan != NULL );
assert( Client != NULL );
/* Create new CL2CHAN structure */
cl2chan = (CL2CHAN *)malloc( sizeof( CL2CHAN ));
if( ! cl2chan )
{
Log( LOG_EMERG, "Can't allocate memory! [Add_Client]" );
return NULL;
}
cl2chan->channel = Chan;
cl2chan->client = Client;
strcpy( cl2chan->modes, "" );
/* concatenate */
cl2chan->next = My_Cl2Chan;
My_Cl2Chan = cl2chan;
LogDebug("User \"%s\" joined channel \"%s\".", Client_Mask(Client), Chan->name);
return cl2chan;
} /* Add_Client */
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( ! Channel_HasMode( Chan, 'P' ))
{
if( ! Get_First_Cl2Chan( NULL, Chan )) Delete_Channel( Chan );
}
return true;
} /* Remove_Client */
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);
}
GLOBAL bool
Channel_AddExcept(CHANNEL *c, const char *mask, const char *who )
{
struct list_head *h = Channel_GetListExcepts(c);
LogDebug("Adding \"%s\" to \"%s\" exception list", mask, Channel_Name(c));
return Lists_Add(h, mask, time(NULL), who, false);
}
GLOBAL bool
Channel_AddInvite(CHANNEL *c, const char *mask, bool onlyonce, const char *who )
{
struct list_head *h = Channel_GetListInvites(c);
LogDebug("Adding \"%s\" to \"%s\" invite list", mask, Channel_Name(c));
return Lists_Add(h, mask, time(NULL), who, onlyonce);
}
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),
Lists_GetReason(e),
Lists_GetValidity(e)))
return DISCONNECTED;
e = Lists_GetNext(e);
}
return IRC_WriteStrClient(Client, msg_end, Client_ID(Client),
Channel_Name(Channel));
}
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);
}
GLOBAL bool
Channel_ShowExcepts( CLIENT *Client, CHANNEL *Channel )
{
struct list_head *h;
assert( Channel != NULL );
h = Channel_GetListExcepts(Channel);
return ShowChannelList(h, Client, Channel, RPL_EXCEPTLIST_MSG,
RPL_ENDOFEXCEPTLIST_MSG);
}
GLOBAL bool
Channel_ShowInvites( CLIENT *Client, CHANNEL *Channel )
{
struct list_head *h;
assert( Channel != NULL );
h = Channel_GetListInvites(Channel);
return ShowChannelList(h, Client, Channel, RPL_INVITELIST_MSG,
RPL_ENDOFINVITELIST_MSG);
}
/**
* Log a message to the local &SERVER channel, if it exists.
*/
GLOBAL void
Channel_LogServer(const char *msg)
{
CHANNEL *sc;
CLIENT *c;
assert(msg != NULL);
sc = Channel_Search("&SERVER");
if (!sc)
return;
c = Client_ThisServer();
Channel_Write(sc, c, c, "PRIVMSG", false, msg);
} /* Channel_LogServer */
GLOBAL bool
Channel_CheckKey(CHANNEL *Chan, CLIENT *Client, const char *Key)
{
char *file_name, line[COMMAND_LEN], *nick, *pass;
FILE *fd;
assert(Chan != NULL);
assert(Client != NULL);
assert(Key != NULL);
if (!Channel_HasMode(Chan, 'k'))
return true;
if (*Key == '\0')
return false;
if (strcmp(Chan->key, Key) == 0)
return true;
file_name = array_start(&Chan->keyfile);
if (!file_name)
return false;
fd = fopen(file_name, "r");
if (!fd) {
Log(LOG_ERR, "Can't open channel key file \"%s\" for %s: %s",
file_name, Chan->name, strerror(errno));
return false;
}
while (fgets(line, (int)sizeof(line), fd) != NULL) {
ngt_TrimStr(line);
if (! (nick = strchr(line, ':')))
continue;
*nick++ = '\0';
if (!Match(line, Client_User(Client)))
continue;
if (! (pass = strchr(nick, ':')))
continue;
*pass++ = '\0';
if (!Match(nick, Client_ID(Client)))
continue;
if (strcmp(Key, pass) != 0)
continue;
fclose(fd);
return true;
}
fclose(fd);
return false;
} /* Channel_CheckKey */
static CL2CHAN *
Get_First_Cl2Chan( CLIENT *Client, CHANNEL *Chan )
{
return Get_Next_Cl2Chan( My_Cl2Chan, Client, Chan );
} /* Get_First_Cl2Chan */
static CL2CHAN *
Get_Next_Cl2Chan( CL2CHAN *Start, CLIENT *Client, CHANNEL *Channel )
{
CL2CHAN *cl2chan;
assert( Client != NULL || Channel != NULL );
cl2chan = Start;
while( cl2chan )
{
if(( Client ) && ( cl2chan->client == Client )) return cl2chan;
if(( Channel ) && ( cl2chan->channel == Channel )) return cl2chan;
cl2chan = cl2chan->next;
}
return NULL;
} /* Get_Next_Cl2Chan */
/**
* Remove a channel and free all of its data structures.
*/
static void
Delete_Channel(CHANNEL *Chan)
{
CHANNEL *chan, *last_chan;
last_chan = NULL;
chan = My_Channels;
while (chan) {
if (chan == Chan)
break;
last_chan = chan;
chan = chan->next;
}
assert(chan != NULL);
if (!chan)
return;
/* maintain channel list */
if (last_chan)
last_chan->next = chan->next;
else
My_Channels = chan->next;
LogDebug("Freed channel structure for \"%s\".", Chan->name);
Free_Channel(Chan);
} /* Delete_Channel */
static void
Set_KeyFile(CHANNEL *Chan, const char *KeyFile)
{
size_t len;
assert(Chan != NULL);
assert(KeyFile != NULL);
len = strlen(KeyFile);
if (len < array_bytes(&Chan->keyfile)) {
Log(LOG_INFO, "Channel key file of %s removed.", Chan->name);
array_free(&Chan->keyfile);
}
if (len < 1)
return;
if (!array_copyb(&Chan->keyfile, KeyFile, len+1))
Log(LOG_WARNING,
"Could not set new channel key file \"%s\" for %s: %s",
KeyFile, Chan->name, strerror(errno));
else
Log(LOG_INFO|LOG_snotice,
"New local channel key file \"%s\" for %s activated.",
KeyFile, Chan->name);
} /* Set_KeyFile */
/* -eof- */
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