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- /*
- * 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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