/** * Handler for the IRC "ERROR" 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_ERROR(CLIENT *Client, REQUEST *Req) { assert( Client != NULL ); assert( Req != NULL ); if (Client_Type(Client) != CLIENT_GOTPASS && Client_Type(Client) != CLIENT_GOTPASS_2813 && Client_Type(Client) != CLIENT_UNKNOWNSERVER && Client_Type(Client) != CLIENT_SERVER && Client_Type(Client) != CLIENT_SERVICE) { LogDebug("Ignored ERROR command from \"%s\" ...", Client_Mask(Client)); IRC_SetPenalty(Client, 2); return CONNECTED; } if (Req->argc < 1) Log(LOG_NOTICE, "Got ERROR from \"%s\"!", Client_Mask(Client)); else Log(LOG_NOTICE, "Got ERROR from \"%s\": \"%s\"!", Client_Mask(Client), Req->argv[0]); return CONNECTED; } /* IRC_ERROR */
/** * Check that the originator of a request is an IRC operator and allowed * to administer this server. * * @param CLient Client from which the command has been received. * @param Req Request structure. * @return CLIENT structure of the client that initiated the command or * NULL if client is not allowed to execute operator commands. */ GLOBAL CLIENT * Op_Check(CLIENT * Client, REQUEST * Req) { CLIENT *c; assert(Client != NULL); assert(Req != NULL); if (Client_Type(Client) == CLIENT_SERVER && Req->prefix) c = Client_Search(Req->prefix); else c = Client; if (!c) return NULL; if (Client_Type(Client) == CLIENT_SERVER && Client_Type(c) == CLIENT_SERVER) return c; if (!Client_HasMode(c, 'o')) return NULL; if (Client_Conn(c) <= NONE && !Conf_AllowRemoteOper) return NULL; /* The client is an local IRC operator, or this server is configured * to trust remote operators. */ return c; } /* Op_Check */
/** * Kill an client identified by its nick name. * * Please note that after killig a client, its CLIENT cond CONNECTION * structures are invalid. So the caller must make sure on its own not to * access data of probably killed clients after calling this function! * * @param Client The client from which the command leading to the KILL has * been received, or NULL. The KILL will no be forwarded in this * direction. Only relevant when From is set, too. * @param From The client from which the command originated, or NULL for the local server. * @param Nick The nick name to kill. * @param Reason Text to send as reason to the client and other servers. */ GLOBAL bool IRC_KillClient(CLIENT *Client, CLIENT *From, const char *Nick, const char *Reason) { const char *msg; CONN_ID my_conn, conn; CLIENT *c; /* Do we know such a client in the network? */ c = Client_Search(Nick); if (!c) { LogDebug("Client with nick \"%s\" is unknown, not forwaring.", Nick); return CONNECTED; } /* Inform other servers */ IRC_WriteStrServersPrefix(From ? Client : NULL, From ? From : Client_ThisServer(), "KILL %s :%s", Nick, Reason); 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_WriteErrClient(Client, msg, Client_ID(Client)); } Log(LOG_ERR, "Got KILL for invalid client type: %d, \"%s\"!", Client_Type(c), Nick); } /* Save ID of this connection */ my_conn = Client_Conn(Client); /* 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); /* Are we still connected or were we killed, too? */ if (my_conn > NONE && Conn_GetClient(my_conn)) return CONNECTED; else return DISCONNECTED; }
/** * Check if the "mode limit" for a client has been reached. * * This limit doesn't apply for servers or services! * * @param Client The client to check. * @param Count The number of modes already handled. * @return true if the limit has been reached. */ static bool Mode_Limit_Reached(CLIENT *Client, int Count) { if (Client_Type(Client) == CLIENT_SERVER || Client_Type(Client) == CLIENT_SERVICE) return false; if (Count < MAX_HNDL_MODES_ARG) return false; return true; }
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 */
/** * Send information about changed channel invite/ban/exception lists to clients. * * @param IsAdd true if the list item has been added, false otherwise. * @param ModeChar The mode to use (e. g. 'b' or 'I') * @param Prefix The originator of the mode list change. * @param Client The sender of the command. * @param Channel The channel of which the list has been modified. * @param Mask The mask which has been added or removed. * @return CONNECTED or DISCONNECTED. */ static bool Send_ListChange(const bool IsAdd, const char ModeChar, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Mask) { bool ok = true; /* Send confirmation to the client */ if (Client_Type(Client) == CLIENT_USER) ok = IRC_WriteStrClientPrefix(Client, Prefix, "MODE %s %c%c %s", Channel_Name(Channel), IsAdd ? '+' : '-', ModeChar, Mask); /* to other servers */ IRC_WriteStrServersPrefix(Client, Prefix, "MODE %s %c%c %s", Channel_Name(Channel), IsAdd ? '+' : '-', ModeChar, Mask); /* and local users in channel */ IRC_WriteStrChannelPrefix(Client, Channel, Prefix, false, "MODE %s %c%c %s", Channel_Name(Channel), IsAdd ? '+' : '-', ModeChar, Mask ); return ok; } /* Send_ListChange */
/** * 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 */
/** * Handler for the "CAP END" command. * * @param Client The client from which this command has been received. * @returns CONNECTED or DISCONNECTED. */ bool Handle_CAP_END(CLIENT *Client) { assert(Client != NULL); if (Client_Type(Client) != CLIENT_USER) { /* User is still logging in ... */ Client_CapDel(Client, CLIENT_CAP_PENDING); if (Client_Type(Client) == CLIENT_WAITCAPEND) { /* Only "CAP END" was missing: log in! */ return Login_User(Client); } } return CONNECTED; }
/** * Set CAP negotiation status and mark client as "supports capabilities". * * @param Client The client to handle. */ void Set_CAP_Negotiation(CLIENT *Client) { assert(Client != NULL); if (Client_Type(Client) != CLIENT_USER) Client_CapAdd(Client, CLIENT_CAP_PENDING); Client_CapAdd(Client, CLIENT_CAP_SUPPORTED); }
/** * Add entries to channel invite, ban and exception lists. * * @param what Can be 'I' for invite, 'b' for ban, and 'e' for exception list. * @param Prefix The originator of the command. * @param Client The sender of the command. * @param Channel The channel of which the list should be modified. * @param Pattern The pattern to add to the list. * @return CONNECTED or DISCONNECTED. */ static bool Add_To_List(char what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern) { char mask[MASK_LEN]; struct list_head *list = NULL; long int current_count; assert(Client != NULL); assert(Channel != NULL); assert(Pattern != NULL); assert(what == 'I' || what == 'b' || what == 'e'); Lists_MakeMask(Pattern, mask, sizeof(mask)); current_count = Lists_Count(Channel_GetListInvites(Channel)) + Lists_Count(Channel_GetListExcepts(Channel)) + Lists_Count(Channel_GetListBans(Channel)); switch(what) { case 'I': list = Channel_GetListInvites(Channel); break; case 'b': list = Channel_GetListBans(Channel); break; case 'e': list = Channel_GetListExcepts(Channel); break; } if (Lists_CheckDupeMask(list, mask)) return CONNECTED; if (Client_Type(Client) == CLIENT_USER && current_count >= MAX_HNDL_CHANNEL_LISTS) return IRC_WriteErrClient(Client, ERR_LISTFULL_MSG, Client_ID(Client), Channel_Name(Channel), mask, MAX_HNDL_CHANNEL_LISTS); switch (what) { case 'I': if (!Channel_AddInvite(Channel, mask, false, Client_ID(Client))) return CONNECTED; break; case 'b': if (!Channel_AddBan(Channel, mask, Client_ID(Client))) return CONNECTED; break; case 'e': if (!Channel_AddExcept(Channel, mask, Client_ID(Client))) return CONNECTED; break; } return Send_ListChange(true, what, Prefix, Client, Channel, mask); }
/** * Handler for the IRC "KILL" command. * * This function implements the IRC command "KILL" which 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. * @return CONNECTED or DISCONNECTED. */ GLOBAL bool IRC_KILL(CLIENT *Client, REQUEST *Req) { CLIENT *prefix; char reason[COMMAND_LEN]; assert (Client != NULL); assert (Req != NULL); if (Client_Type(Client) != CLIENT_SERVER && !Op_Check(Client, Req)) return Op_NoPrivileges(Client, Req); /* 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. And this is the reason why we don't * use the _IRC_GET_SENDER_OR_RETURN_ macro above! */ 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)); return IRC_KillClient(Client, prefix, Req->argv[0], reason); }
/** * 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 */
/** * Make sure that a given nickname is valid. * * If the nickname is not valid for the given client, this function sends back * the appropriate error messages. * * @param Client Client that wants to change the nickname. * @param Nick New nickname. * @returns true if nickname is valid, false otherwise. */ GLOBAL bool Client_CheckNick(CLIENT *Client, char *Nick) { assert(Client != NULL); assert(Nick != NULL); if (!Client_IsValidNick(Nick)) { if (strlen(Nick ) >= Conf_MaxNickLength) IRC_WriteErrClient(Client, ERR_NICKNAMETOOLONG_MSG, Client_ID(Client), Nick, Conf_MaxNickLength - 1); else IRC_WriteErrClient(Client, ERR_ERRONEUSNICKNAME_MSG, Client_ID(Client), Nick); return false; } if (Client_Type(Client) != CLIENT_SERVER && Client_Type(Client) != CLIENT_SERVICE) { /* Make sure that this isn't a restricted/forbidden nickname */ if (Conf_NickIsBlocked(Nick)) { IRC_WriteErrClient(Client, ERR_FORBIDDENNICKNAME_MSG, Client_ID(Client), Nick); return false; } } /* Nickname already registered? */ if (Client_Search(Nick)) { IRC_WriteErrClient(Client, ERR_NICKNAMEINUSE_MSG, Client_ID(Client), Nick); return false; } return true; } /* Client_CheckNick */
/** * Handler for the IRC "ERROR" 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_ERROR(CLIENT *Client, REQUEST *Req) { char *msg; assert( Client != NULL ); assert( Req != NULL ); if (Client_Type(Client) != CLIENT_GOTPASS && Client_Type(Client) != CLIENT_GOTPASS_2813 && Client_Type(Client) != CLIENT_UNKNOWNSERVER && Client_Type(Client) != CLIENT_SERVER && Client_Type(Client) != CLIENT_SERVICE) { LogDebug("Ignored ERROR command from \"%s\" ...", Client_Mask(Client)); IRC_SetPenalty(Client, 2); return CONNECTED; } if (Req->argc < 1) { msg = "Got ERROR command"; Log(LOG_NOTICE, "Got ERROR from \"%s\"!", Client_Mask(Client)); } else { msg = Req->argv[0]; Log(LOG_NOTICE, "Got ERROR from \"%s\": \"%s\"!", Client_Mask(Client), msg); } if (Client_Conn(Client) != NONE) { Conn_Close(Client_Conn(Client), NULL, msg, false); return DISCONNECTED; } return CONNECTED; } /* IRC_ERROR */
GLOBAL void Client_DebugDump(void) { CLIENT *c; Log(LOG_DEBUG, "Client status:"); c = My_Clients; while (c) { Log(LOG_DEBUG, " - %s: type=%d, host=%s, user=%s, conn=%d, start=%ld, flags=%s", Client_ID(c), Client_Type(c), Client_Hostname(c), Client_User(c), Client_Conn(c), Client_StartTime(c), Client_Flags(c)); c = (CLIENT *)c->next; } } /* Client_DumpClients */
GLOBAL const char * Client_TypeText(CLIENT *Client) { assert(Client != NULL); switch (Client_Type(Client)) { case CLIENT_USER: return "User"; break; case CLIENT_SERVICE: return "Service"; break; case CLIENT_SERVER: return "Server"; break; default: return "Client"; } } /* Client_TypeText */
/** * 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 */
/** * Search first CLIENT structure matching a given mask of a server. * * The order of servers is arbitrary, but this function makes sure that the * local server is always returned if the mask matches it. * * @return Pointer to CLIENT structure or NULL if no server could be found. */ GLOBAL CLIENT * Client_SearchServer(const char *Mask) { CLIENT *c; assert(Mask != NULL); /* First check if mask matches the local server */ if (MatchCaseInsensitive(Mask, Client_ID(Client_ThisServer()))) return Client_ThisServer(); c = My_Clients; while (c) { if (Client_Type(c) == CLIENT_SERVER) { /* This is a server: check if Mask matches */ if (MatchCaseInsensitive(Mask, c->id)) return c; } c = (CLIENT *)c->next; } return NULL; }
/** * 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 */
/** * Kick user from Channel */ GLOBAL void Channel_Kick(CLIENT *Peer, CLIENT *Target, CLIENT *Origin, const char *Name, const char *Reason ) { CHANNEL *chan; char *ptr, *target_modes; 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_WriteStrClient( 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_WriteStrClient( Origin, ERR_NOTONCHANNEL_MSG, Client_ID(Origin), 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 ((strchr(Channel_Modes(chan), 'Q') || Client_HasMode(Target, 'q') || Client_Type(Target) == CLIENT_SERVICE) && !Client_HasMode(Origin, 'o')) { IRC_WriteStrClient(Origin, ERR_KICKDENY_MSG, Client_ID(Origin), Name, Client_ID(Target)); return; } /* Check if client has the rights to kick target */ ptr = Channel_UserModes(chan, Peer); target_modes = Channel_UserModes(chan, Target); while(*ptr) { /* Owner can kick everyone */ if ( *ptr == 'q') { can_kick = true; break; } /* Admin can't kick owner */ if ( *ptr == 'a' ) { if (!strchr(target_modes, 'q')) { can_kick = true; break; } } /* Op can't kick owner | admin */ if ( *ptr == 'o' ) { if (!strchr(target_modes, 'q') && !strchr(target_modes, 'a')) { can_kick = true; break; } } /* Half Op can't kick owner | admin | op */ if ( *ptr == 'h' ) { if (!strchr(target_modes, 'q') && !strchr(target_modes, 'a') && !strchr(target_modes, 'o')) { can_kick = true; break; } } ptr++; } if(!can_kick) { IRC_WriteStrClient(Origin, ERR_CHANOPPRIVTOOLOW_MSG, Client_ID(Origin), Name); return; } } /* Check that the client to be kicked is on the specified channel */ if (!Channel_IsMemberOf(chan, Target)) { IRC_WriteStrClient(Origin, ERR_USERNOTINCHANNEL_MSG, Client_ID(Origin), Client_ID(Target), Name ); return; } /* Kick Client from channel */ Remove_Client( REMOVE_KICK, chan, Target, Origin, Reason, true); } /* Channel_Kick */
/** * Handle channel mode and channel-user mode changes * * @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 Channel The target channel of this MODE command. * @return CONNECTED or DISCONNECTED. */ static bool Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel) { char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], x[2], argadd[CLIENT_PASS_LEN], *mode_ptr; bool connected, set, skiponce, retval, use_servermode, is_halfop, is_op, is_admin, is_owner, is_machine, is_oper; int mode_arg, arg_arg, mode_arg_count = 0; CLIENT *client; long l; size_t len; is_halfop = is_op = is_admin = is_owner = is_machine = is_oper = false; if (Channel_IsModeless(Channel)) return IRC_WriteErrClient(Client, ERR_NOCHANMODES_MSG, Client_ID(Client), Channel_Name(Channel)); /* Mode request: let's answer it :-) */ if (Req->argc <= 1) return Channel_Mode_Answer_Request(Origin, Channel); /* Check if origin is oper and opers can use mode */ use_servermode = Conf_OperServerMode; if(Client_HasMode(Client, 'o') && Conf_OperCanMode) { is_oper = true; } /* Check if client is a server/service */ if(Client_Type(Client) == CLIENT_SERVER || Client_Type(Client) == CLIENT_SERVICE) { is_machine = true; } /* Check if client is member of channel or an oper or an server/service */ if(!Channel_IsMemberOf(Channel, Client) && !is_oper && !is_machine) return IRC_WriteErrClient(Origin, ERR_NOTONCHANNEL_MSG, Client_ID(Origin), Channel_Name(Channel)); mode_arg = 1; mode_ptr = Req->argv[mode_arg]; if (Req->argc > mode_arg + 1) arg_arg = mode_arg + 1; else arg_arg = -1; /* Initial state: set or unset modes? */ skiponce = false; switch (*mode_ptr) { case '-': set = false; break; case '+': set = true; break; default: set = true; skiponce = true; } /* Prepare reply string */ strcpy(the_modes, set ? "+" : "-"); the_args[0] = '\0'; x[1] = '\0'; connected = CONNECTED; while (mode_ptr) { if (!skiponce) mode_ptr++; if (!*mode_ptr) { /* Try next argument if there's any */ if (arg_arg < 0) break; if (arg_arg > mode_arg) mode_arg = arg_arg; else mode_arg++; if (mode_arg >= Req->argc) break; mode_ptr = Req->argv[mode_arg]; if (Req->argc > mode_arg + 1) arg_arg = mode_arg + 1; else arg_arg = -1; } skiponce = false; 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] == '-') { /* Adjust last action modifier in result */ the_modes[len] = *mode_ptr; } else { /* Append modifier character to result string */ x[0] = *mode_ptr; strlcat(the_modes, x, sizeof(the_modes)); } set = *mode_ptr == '+'; } continue; } /* Are there arguments left? */ if (arg_arg >= Req->argc) arg_arg = -1; if(!is_machine && !is_oper) { if (Channel_UserHasMode(Channel, Client, 'q')) is_owner = true; if (Channel_UserHasMode(Channel, Client, 'a')) is_admin = true; if (Channel_UserHasMode(Channel, Client, 'o')) is_op = true; if (Channel_UserHasMode(Channel, Client, 'h')) is_halfop = true; } /* Validate modes */ x[0] = '\0'; argadd[0] = '\0'; client = NULL; switch (*mode_ptr) { /* --- Channel modes --- */ case 'R': /* Registered users only */ case 's': /* Secret channel */ case 'z': /* Secure connections only */ if(!is_oper && !is_machine && !is_owner && !is_admin && !is_op) { connected = IRC_WriteErrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel)); goto chan_exit; } case 'i': /* Invite only */ case 'V': /* Invite disallow */ case 'M': /* Only identified nicks can write */ case 'm': /* Moderated */ case 'n': /* Only members can write */ case 'N': /* Can't change nick while on this channel */ case 'Q': /* No kicks */ case 't': /* Topic locked */ if(is_oper || is_machine || is_owner || is_admin || is_op || is_halfop) x[0] = *mode_ptr; else connected = IRC_WriteErrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel)); break; case 'k': /* Channel key */ if (Mode_Limit_Reached(Client, mode_arg_count++)) goto chan_exit; if (!set) { if (is_oper || is_machine || is_owner || is_admin || is_op || is_halfop) { x[0] = *mode_ptr; if (Channel_HasMode(Channel, 'k')) strlcpy(argadd, "*", sizeof(argadd)); if (arg_arg > mode_arg) arg_arg++; } else connected = IRC_WriteErrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel)); break; } if (arg_arg > mode_arg) { if (is_oper || is_machine || is_owner || is_admin || is_op || is_halfop) { Channel_ModeDel(Channel, 'k'); Channel_SetKey(Channel, Req->argv[arg_arg]); strlcpy(argadd, Channel_Key(Channel), sizeof(argadd)); x[0] = *mode_ptr; } else { connected = IRC_WriteErrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel)); } Req->argv[arg_arg][0] = '\0'; arg_arg++; } else { #ifdef STRICT_RFC /* Only send error message in "strict" mode, * this is how ircd2.11 and others behave ... */ connected = IRC_WriteErrClient(Origin, ERR_NEEDMOREPARAMS_MSG, Client_ID(Origin), Req->command); #endif goto chan_exit; } break; case 'l': /* Member limit */ if (Mode_Limit_Reached(Client, mode_arg_count++)) goto chan_exit; if (!set) { if (is_oper || is_machine || is_owner || is_admin || is_op || is_halfop) x[0] = *mode_ptr; else connected = IRC_WriteErrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel)); break; } if (arg_arg > mode_arg) { if (is_oper || is_machine || is_owner || is_admin || is_op || is_halfop) { l = atol(Req->argv[arg_arg]); if (l > 0 && l < 0xFFFF) { Channel_ModeDel(Channel, 'l'); Channel_SetMaxUsers(Channel, l); snprintf(argadd, sizeof(argadd), "%ld", l); x[0] = *mode_ptr; } } else { connected = IRC_WriteErrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel)); } Req->argv[arg_arg][0] = '\0'; arg_arg++; } else { #ifdef STRICT_RFC /* Only send error message in "strict" mode, * this is how ircd2.11 and others behave ... */ connected = IRC_WriteErrClient(Origin, ERR_NEEDMOREPARAMS_MSG, Client_ID(Origin), Req->command); #endif goto chan_exit; } break; case 'O': /* IRC operators only */ if (set) { /* Only IRC operators are allowed to * set the 'O' channel mode! */ if(is_oper || is_machine) x[0] = 'O'; else connected = IRC_WriteErrClient(Origin, ERR_NOPRIVILEGES_MSG, Client_ID(Origin)); } else if(is_oper || is_machine || is_owner || is_admin || is_op) x[0] = 'O'; else connected = IRC_WriteErrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel)); break; case 'P': /* Persistent channel */ if (set) { /* Only IRC operators are allowed to * set the 'P' channel mode! */ if(is_oper || is_machine) x[0] = 'P'; else connected = IRC_WriteErrClient(Origin, ERR_NOPRIVILEGES_MSG, Client_ID(Origin)); } else if(is_oper || is_machine || is_owner || is_admin || is_op) x[0] = 'P'; else connected = IRC_WriteErrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel)); break; /* --- Channel user modes --- */ case 'q': /* Owner */ case 'a': /* Channel admin */ if(!is_oper && !is_machine && !is_owner && !is_admin) { connected = IRC_WriteErrClient(Origin, ERR_CHANOPPRIVTOOLOW_MSG, Client_ID(Origin), Channel_Name(Channel)); goto chan_exit; } case 'o': /* Channel operator */ if(!is_oper && !is_machine && !is_owner && !is_admin && !is_op) { connected = IRC_WriteErrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel)); goto chan_exit; } case 'h': /* Half Op */ if(!is_oper && !is_machine && !is_owner && !is_admin && !is_op) { connected = IRC_WriteErrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel)); goto chan_exit; } case 'v': /* Voice */ if (arg_arg > mode_arg) { if (is_oper || is_machine || is_owner || is_admin || is_op || is_halfop) { client = Client_Search(Req->argv[arg_arg]); if (client) x[0] = *mode_ptr; else connected = IRC_WriteErrClient(Origin, ERR_NOSUCHNICK_MSG, Client_ID(Origin), Req->argv[arg_arg]); } else { connected = IRC_WriteErrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel)); } Req->argv[arg_arg][0] = '\0'; arg_arg++; } else { #ifdef STRICT_RFC /* Report an error to the client, when a user * mode should be changed but no nickname is * given. But don't do it when not in "strict" * mode, because most other servers don't do * it as well and some clients send "wired" * MODE commands like "MODE #chan -ooo nick". */ connected = IRC_WriteErrClient(Origin, ERR_NEEDMOREPARAMS_MSG, Client_ID(Origin), Req->command); #endif goto chan_exit; } break; /* --- Channel lists --- */ case 'I': /* Invite lists */ case 'b': /* Ban lists */ case 'e': /* Channel exception lists */ if (Mode_Limit_Reached(Client, mode_arg_count++)) goto chan_exit; if (arg_arg > mode_arg) { /* modify list */ if (is_oper || is_machine || is_owner || is_admin || is_op || is_halfop) { connected = set ? Add_To_List(*mode_ptr, Origin, Client, Channel, Req->argv[arg_arg]) : Del_From_List(*mode_ptr, Origin, Client, Channel, Req->argv[arg_arg]); } else { connected = IRC_WriteErrClient(Origin, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(Origin), Channel_Name(Channel)); } Req->argv[arg_arg][0] = '\0'; arg_arg++; } else { switch (*mode_ptr) { case 'I': Channel_ShowInvites(Origin, Channel); break; case 'b': Channel_ShowBans(Origin, Channel); break; case 'e': Channel_ShowExcepts(Origin, Channel); break; } } break; default: if (Client_Type(Client) != CLIENT_SERVER) { Log(LOG_DEBUG, "Unknown mode \"%c%c\" from \"%s\" on %s!?", set ? '+' : '-', *mode_ptr, Client_ID(Origin), Channel_Name(Channel)); connected = IRC_WriteErrClient(Origin, ERR_UNKNOWNMODE_MSG, Client_ID(Origin), *mode_ptr, Channel_Name(Channel)); x[0] = '\0'; } else { Log(LOG_DEBUG, "Handling unknown mode \"%c%c\" from \"%s\" on %s ...", set ? '+' : '-', *mode_ptr, Client_ID(Origin), Channel_Name(Channel)); x[0] = *mode_ptr; } } if (!connected) break; /* Is there a valid mode change? */ if (!x[0]) continue; /* Validate target client */ if (client && (!Channel_IsMemberOf(Channel, client))) { if (!IRC_WriteErrClient(Origin, ERR_USERNOTINCHANNEL_MSG, Client_ID(Origin), Client_ID(client), Channel_Name(Channel))) break; continue; } if (client) { /* Channel-User-Mode */ retval = set ? Channel_UserModeAdd(Channel, client, x[0]) : Channel_UserModeDel(Channel, client, x[0]); if (retval) { strlcat(the_args, " ", sizeof(the_args)); strlcat(the_args, Client_ID(client), sizeof(the_args)); strlcat(the_modes, x, sizeof(the_modes)); LogDebug ("User \"%s\": Mode change on %s, now \"%s\"", Client_Mask(client), Channel_Name(Channel), Channel_UserModes(Channel, client)); } } else { /* Channel-Mode */ retval = set ? Channel_ModeAdd(Channel, x[0]) : Channel_ModeDel(Channel, x[0]); if (retval) { strlcat(the_modes, x, sizeof(the_modes)); LogDebug("Channel %s: Mode change, now \"%s\".", Channel_Name(Channel), Channel_Modes(Channel)); } } /* Are there additional arguments to add? */ if (argadd[0]) { strlcat(the_args, " ", sizeof(the_args)); strlcat(the_args, argadd, sizeof(the_args)); } } chan_exit: /* Are there changed modes? */ if (the_modes[1]) { /* Clean up mode string */ len = strlen(the_modes) - 1; if ((the_modes[len] == '+') || (the_modes[len] == '-')) the_modes[len] = '\0'; if (Client_Type(Client) == CLIENT_SERVER) { /* MODE requests for local channels from other servers * are definitely invalid! */ if (Channel_IsLocal(Channel)) { Log(LOG_ALERT, "Got remote MODE command for local channel!? Ignored."); return CONNECTED; } /* Forward mode changes to channel users and all the * other remote servers: */ IRC_WriteStrServersPrefix(Client, Origin, "MODE %s %s%s", Channel_Name(Channel), the_modes, the_args); IRC_WriteStrChannelPrefix(Client, Channel, Origin, false, "MODE %s %s%s", Channel_Name(Channel), the_modes, the_args); } else { if (use_servermode) Origin = Client_ThisServer(); /* Send reply to client and inform other servers and channel users */ connected = IRC_WriteStrClientPrefix(Client, Origin, "MODE %s %s%s", Channel_Name(Channel), the_modes, the_args); /* Only forward requests for non-local channels */ if (!Channel_IsLocal(Channel)) IRC_WriteStrServersPrefix(Client, Origin, "MODE %s %s%s", Channel_Name(Channel), the_modes, the_args); IRC_WriteStrChannelPrefix(Client, Channel, Origin, false, "MODE %s %s%s", Channel_Name(Channel), the_modes, the_args); } } return connected; } /* Channel_Mode */
/** * 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 */
/* * Handler for the IRC "TRACE" 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_TRACE(CLIENT *Client, REQUEST *Req) { CLIENT *from, *target, *c; CONN_ID idx, idx2; char user[CLIENT_USER_LEN]; assert(Client != NULL); assert(Req != NULL); _IRC_GET_SENDER_OR_RETURN_(from, Req, Client) _IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 0, from) /* Forward command to other server? */ if (target != Client_ThisServer()) { /* 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), (long)(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 && Client_HasMode(c, 'o')) { /* IRC Operator */ if (!IRC_WriteStrClient(from, RPL_TRACEOPERATOR_MSG, Client_ID(from), Client_ID(c))) return DISCONNECTED; } } c = Client_Next( c ); } return IRC_WriteStrClient(from, RPL_TRACEEND_MSG, Client_ID(from), Conf_ServerName, PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_DebugLevel); } /* IRC_TRACE */
/** * Get pointer to a static string representing the connection "options". * * @param Idx Connection index. * @return Pointer to static (global) string buffer. */ static char * #if defined(SSL_SUPPORT) || defined(ZLIB) Option_String(CONN_ID Idx) { static char option_txt[8]; UINT16 options; assert(Idx != NONE); options = Conn_Options(Idx); strcpy(option_txt, "F"); /* No idea what this means, but the * original ircd sends it ... */ #ifdef SSL_SUPPORT if(options & CONN_SSL) /* SSL encrypted link */ strlcat(option_txt, "s", sizeof(option_txt)); #endif #ifdef ZLIB if(options & CONN_ZIP) /* zlib compression enabled */ strlcat(option_txt, "z", sizeof(option_txt)); #endif return option_txt; #else Option_String(UNUSED CONN_ID Idx) { return ""; #endif } /* Option_String */ /** * Send a message to target(s). * * This function is used by IRC_{PRIVMSG|NOTICE|SQUERY} to actualy * send the message(s). * * @param Client The client from which this command has been received. * @param Req Request structure with prefix and all parameters. * @param ForceType Required type of the destination of the message(s). * @param SendErrors Whether to report errors back to the client or not. * @return CONNECTED or DISCONNECTED. */ 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 *strtok_last = NULL; char *message = NULL; char *targets[MAX_HNDL_TARGETS]; int i, target_nr = 0; assert(Client != NULL); assert(Req != NULL); if (Req->argc == 0) { if (!SendErrors) return CONNECTED; return IRC_WriteErrClient(Client, ERR_NORECIPIENT_MSG, Client_ID(Client), Req->command); } if (Req->argc == 1) { if (!SendErrors) return CONNECTED; return IRC_WriteErrClient(Client, ERR_NOTEXTTOSEND_MSG, Client_ID(Client)); } if (Req->argc > 2) { if (!SendErrors) return CONNECTED; return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG, Client_ID(Client), Req->command); } if (Client_Type(Client) == CLIENT_SERVER && Req->prefix) from = Client_Search(Req->prefix); else from = Client; if (!from) return IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG, Client_ID(Client), Req->prefix); #ifdef ICONV if (Client_Conn(Client) > NONE) message = Conn_EncodingFrom(Client_Conn(Client), Req->argv[1]); else #endif message = Req->argv[1]; /* handle msgtarget = msgto *("," msgto) */ currentTarget = strtok_r(currentTarget, ",", &strtok_last); ngt_UpperStr(Req->command); /* Please note that "currentTarget" is NULL when the target contains * the separator character only, e. g. "," or ",,,," etc.! */ while (currentTarget) { /* Make sure that there hasn't been such a target already: */ targets[target_nr++] = currentTarget; for(i = 0; i < target_nr - 1; i++) { if (strcasecmp(currentTarget, targets[i]) == 0) goto send_next_target; } /* 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_HostnameDisplayed(cl)) == 0) break; else continue; } if (strcasecmp(user, Client_User(cl)) != 0) continue; if (host != NULL && strcasecmp(host, Client_HostnameDisplayed(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_WriteErrClient( 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, 'b') && !Client_HasMode(from, 'R') && !Client_HasMode(from, 'o') && !(Client_Type(from) == CLIENT_SERVER) && !(Client_Type(from) == CLIENT_SERVICE)) { if (SendErrors && !IRC_WriteErrClient(from, ERR_NONONREG_MSG, Client_ID(from), Client_ID(cl))) return DISCONNECTED; goto send_next_target; } if (Client_HasMode(cl, 'C') && !Client_HasMode(from, 'o') && !(Client_Type(from) == CLIENT_SERVER) && !(Client_Type(from) == CLIENT_SERVICE)) { 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_WriteErrClient( from, ERR_NOTONSAMECHANNEL_MSG, Client_ID(from), Client_ID(cl))) return DISCONNECTED; goto send_next_target; } } if (SendErrors && (Client_Type(Client) != CLIENT_SERVER) && Client_HasMode(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), message)) return DISCONNECTED; } else if (ForceType != CLIENT_SERVICE && (chan = Channel_Search(currentTarget))) { /* Target is a channel */ if (!Channel_Write(chan, from, Client, Req->command, SendErrors, message)) return DISCONNECTED; } else if (ForceType != CLIENT_SERVICE && strchr("$#", currentTarget[0]) && strchr(currentTarget, '.')) { /* $#: server/host mask, RFC 2812, sec. 3.3.1 */ if (!Send_Message_Mask(from, Req->command, currentTarget, message, SendErrors)) return DISCONNECTED; } else { if (!SendErrors) return CONNECTED; if (!IRC_WriteErrClient(from, ERR_NOSUCHNICK_MSG, Client_ID(from), currentTarget)) return DISCONNECTED; } send_next_target: currentTarget = strtok_r(NULL, ",", &strtok_last); if (!currentTarget) break; Conn_SetPenalty(Client_Conn(Client), 1); if (target_nr >= MAX_HNDL_TARGETS) { /* Too many targets given! */ return IRC_WriteErrClient(Client, ERR_TOOMANYTARGETS_MSG, currentTarget); } } return CONNECTED; } /* Send_Message */ /** * Send a message to "target mask" target(s). * * See RFC 2812, sec. 3.3.1 for details. * * @param from The client from which this command has been received. * @param command The command to use (PRIVMSG, NOTICE, ...). * @param targetMask The "target mask" (will be verified by this function). * @param message The message to send. * @param SendErrors Whether to report errors back to the client or not. * @return CONNECTED or DISCONNECTED. */ 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 (!Client_HasMode(from, 'o')) { if (!SendErrors) return true; return IRC_WriteErrClient(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, '.'); if (!check_wildcards || check_wildcards[strcspn(check_wildcards, "*?")]) { if (!SendErrors) return true; return IRC_WriteErrClient(from, ERR_WILDTOPLEVEL_MSG, targetMask); } if (targetMask[0] == '#') { /* #: hostmask, 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_Hostname(cl)); if (client_match) if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s", command, Client_ID(cl), message)) return false; } } else { /* $: server mask, see RFC 2812, sec. 3.3.1 */ assert(targetMask[0] == '$'); 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 */
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 */
/** * 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 */
/** * Handler for the IRC command "INVITE". * * @param Client The client from which this command has been received. * @param Req Request structure with prefix and all parameters. * @return CONNECTED or DISCONNECTED. */ GLOBAL bool IRC_INVITE(CLIENT *Client, REQUEST *Req) { CHANNEL *chan; CLIENT *target, *from; const char *colon_if_necessary; bool remember = false; assert( Client != NULL ); assert( Req != NULL ); _IRC_ARGC_EQ_OR_RETURN_(Client, Req, 2) _IRC_GET_SENDER_OR_RETURN_(from, Req, Client) /* Search user */ target = Client_Search(Req->argv[0]); if (!target || (Client_Type(target) != CLIENT_USER)) return IRC_WriteStrClient(from, ERR_NOSUCHNICK_MSG, Client_ID(Client), Req->argv[0]); chan = Channel_Search(Req->argv[1]); if (chan) { /* Channel exists. Is the user a valid member of the channel? */ if (!Channel_IsMemberOf(chan, from)) return IRC_WriteStrClient(from, ERR_NOTONCHANNEL_MSG, Client_ID(Client), Req->argv[1]); /* Is the channel "invite-disallow"? */ if (strchr(Channel_Modes(chan), 'V')) return IRC_WriteStrClient(from, ERR_NOINVITE_MSG, Client_ID(from), Channel_Name(chan)); /* Is the channel "invite-only"? */ if (strchr(Channel_Modes(chan), 'i')) { /* Yes. The user must be channel owner/admin/operator/halfop! */ if (!strchr(Channel_UserModes(chan, from), 'q') && !strchr(Channel_UserModes(chan, from), 'a') && !strchr(Channel_UserModes(chan, from), 'o') && !strchr(Channel_UserModes(chan, from), 'h')) return IRC_WriteStrClient(from, ERR_CHANOPRIVSNEEDED_MSG, Client_ID(from), Channel_Name(chan)); remember = true; } /* Is the target user already member of the channel? */ if (Channel_IsMemberOf(chan, target)) return IRC_WriteStrClient(from, ERR_USERONCHANNEL_MSG, Client_ID(from), Req->argv[0], Req->argv[1]); /* If the target user is banned on that channel: remember invite */ if (Lists_Check(Channel_GetListBans(chan), target)) remember = true; if (remember) { /* We must remember this invite */ if (!Channel_AddInvite(chan, Client_Mask(target), true)) return CONNECTED; } } LogDebug("User \"%s\" invites \"%s\" to \"%s\" ...", Client_Mask(from), Req->argv[0], Req->argv[1]); /* * RFC 2812 says: * 'There is no requirement that the channel [..] must exist or be a valid channel' * The problem with this is that this allows the "channel" to contain spaces, * in which case we must prefix its name with a colon to make it clear that * it is only a single argument. */ colon_if_necessary = strchr(Req->argv[1], ' ') ? ":":""; /* Inform target client */ IRC_WriteStrClientPrefix(target, from, "INVITE %s %s%s", Req->argv[0], colon_if_necessary, Req->argv[1]); if (Client_Conn(target) > NONE) { /* The target user is local, so we have to send the status code */ if (!IRC_WriteStrClientPrefix(from, target, RPL_INVITING_MSG, Client_ID(from), Req->argv[0], colon_if_necessary, Req->argv[1])) return DISCONNECTED; if (strchr(Client_Modes(target), 'a') && !IRC_WriteStrClient(from, RPL_AWAY_MSG, Client_ID(from), Client_ID(target), Client_Away(target))) return DISCONNECTED; } return CONNECTED; } /* IRC_INVITE */
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 */
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 */
/** * Announce an user or service to a server. * * This function differentiates between RFC1459 and RFC2813 server links and * generates the appropriate commands to register the user or service. * * @param Client Server * @param Prefix Prefix for the generated commands * @param User User to announce */ GLOBAL bool Client_Announce(CLIENT * Client, CLIENT * Prefix, CLIENT * User) { CONN_ID conn; char *modes, *user, *host; modes = Client_Modes(User); user = Client_User(User) ? Client_User(User) : "-"; host = Client_Hostname(User) ? Client_Hostname(User) : "-"; conn = Client_Conn(Client); if (Conn_Options(conn) & CONN_RFC1459) { /* RFC 1459 mode: separate NICK and USER commands */ if (! Conn_WriteStr(conn, "NICK %s :%d", Client_ID(User), Client_Hops(User) + 1)) return DISCONNECTED; if (! Conn_WriteStr(conn, ":%s USER %s %s %s :%s", Client_ID(User), user, host, Client_ID(Client_Introducer(User)), Client_Info(User))) return DISCONNECTED; if (modes[0]) { if (! Conn_WriteStr(conn, ":%s MODE %s +%s", Client_ID(User), Client_ID(User), modes)) return DISCONNECTED; } } else { /* RFC 2813 mode: one combined NICK or SERVICE command */ if (Client_Type(User) == CLIENT_SERVICE && Client_HasFlag(Client, 'S')) { if (!IRC_WriteStrClientPrefix(Client, Prefix, "SERVICE %s %d * +%s %d :%s", Client_Mask(User), Client_MyToken(Client_Introducer(User)), modes, Client_Hops(User) + 1, Client_Info(User))) return DISCONNECTED; } else { if (!IRC_WriteStrClientPrefix(Client, Prefix, "NICK %s %d %s %s %d +%s :%s", Client_ID(User), Client_Hops(User) + 1, user, host, Client_MyToken(Client_Introducer(User)), modes, Client_Info(User))) return DISCONNECTED; } } if (Client_HasFlag(Client, 'M')) { /* Synchronize metadata */ if (Client_HostnameCloaked(User)) { if (!IRC_WriteStrClientPrefix(Client, Prefix, "METADATA %s cloakhost :%s", Client_ID(User), Client_HostnameCloaked(User))) return DISCONNECTED; } if (Client_AccountName(User)) { if (!IRC_WriteStrClientPrefix(Client, Prefix, "METADATA %s accountname :%s", Client_ID(User), Client_AccountName(User))) return DISCONNECTED; } if (Conn_GetCertFp(Client_Conn(User))) { if (!IRC_WriteStrClientPrefix(Client, Prefix, "METADATA %s certfp :%s", Client_ID(User), Conn_GetCertFp(Client_Conn(User)))) return DISCONNECTED; } } return CONNECTED; } /* Client_Announce */