383 lines
9.5 KiB
C
383 lines
9.5 KiB
C
/*
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* ngIRCd -- The Next Generation IRC Daemon
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* Copyright (c)2001-2015 Alexander Barton (alex@barton.de) and Contributors.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* Please read the file COPYING, README and AUTHORS for more information.
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*/
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#include "portab.h"
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/**
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* @file
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* Handlers for IRC numerics sent to the server
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*/
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include "conn-func.h"
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#include "conf.h"
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#include "channel.h"
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#include "class.h"
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#include "irc-write.h"
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#include "lists.h"
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#include "log.h"
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#include "parse.h"
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#include "numeric.h"
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/**
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* Announce a channel and its users in the network.
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*/
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static bool
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Announce_Channel(CLIENT *Client, CHANNEL *Chan)
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{
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CL2CHAN *cl2chan;
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CLIENT *cl;
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char str[COMMAND_LEN], *ptr;
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bool njoin, xop;
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/* Check features of remote server */
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njoin = Conn_Options(Client_Conn(Client)) & CONN_RFC1459 ? false : true;
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xop = Client_HasFlag(Client, 'X') ? true : false;
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/* Get all the members of this channel */
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cl2chan = Channel_FirstMember(Chan);
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snprintf(str, sizeof(str), "NJOIN %s :", Channel_Name(Chan));
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while (cl2chan) {
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cl = Channel_GetClient(cl2chan);
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assert(cl != NULL);
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if (njoin) {
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/* RFC 2813: send NJOIN with nicknames and modes
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* (if user is channel operator or has voice) */
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if (str[strlen(str) - 1] != ':')
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strlcat(str, ",", sizeof(str));
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/* Prepare user prefix (ChanOp, voiced, ...) */
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if (xop && Channel_UserHasMode(Chan, cl, 'q'))
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strlcat(str, "~", sizeof(str));
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if (xop && Channel_UserHasMode(Chan, cl, 'a'))
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strlcat(str, "&", sizeof(str));
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if (Channel_UserHasMode(Chan, cl, 'o'))
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strlcat(str, "@", sizeof(str));
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if (xop && Channel_UserHasMode(Chan, cl, 'h'))
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strlcat(str, "%", sizeof(str));
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if (Channel_UserHasMode(Chan, cl, 'v'))
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strlcat(str, "+", sizeof(str));
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strlcat(str, Client_ID(cl), sizeof(str));
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/* Send the data if the buffer is "full" */
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if (strlen(str) > (sizeof(str) - CLIENT_NICK_LEN - 8)) {
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if (!IRC_WriteStrClient(Client, "%s", str))
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return DISCONNECTED;
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snprintf(str, sizeof(str), "NJOIN %s :",
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Channel_Name(Chan));
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}
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} else {
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/* RFC 1459: no NJOIN, send JOIN and MODE */
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if (!IRC_WriteStrClientPrefix(Client, cl, "JOIN %s",
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Channel_Name(Chan)))
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return DISCONNECTED;
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ptr = Channel_UserModes(Chan, cl);
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while (*ptr) {
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if (!IRC_WriteStrClientPrefix(Client, cl,
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"MODE %s +%c %s",
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Channel_Name(Chan), ptr[0],
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Client_ID(cl)))
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return DISCONNECTED;
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ptr++;
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}
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}
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cl2chan = Channel_NextMember(Chan, cl2chan);
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}
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/* Data left in the buffer? */
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if (str[strlen(str) - 1] != ':') {
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/* Yes, send it ... */
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if (!IRC_WriteStrClient(Client, "%s", str))
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return DISCONNECTED;
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}
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return CONNECTED;
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} /* Announce_Channel */
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/**
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* Announce new server in the network
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* @param Client New server
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* @param Server Existing server in the network
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*/
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static bool
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Announce_Server(CLIENT * Client, CLIENT * Server)
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{
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CLIENT *c;
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if (Client_Conn(Server) > NONE) {
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/* Announce the new server to the one already registered
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* which is directly connected to the local server */
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if (!IRC_WriteStrClient
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(Server, "SERVER %s %d %d :%s", Client_ID(Client),
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Client_Hops(Client) + 1, Client_MyToken(Client),
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Client_Info(Client)))
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return DISCONNECTED;
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}
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if (Client_Hops(Server) == 1)
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c = Client_ThisServer();
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else
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c = Client_TopServer(Server);
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/* Inform new server about the one already registered in the network */
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return IRC_WriteStrClientPrefix(Client, c, "SERVER %s %d %d :%s",
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Client_ID(Server), Client_Hops(Server) + 1,
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Client_MyToken(Server), Client_Info(Server));
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} /* Announce_Server */
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#ifdef IRCPLUS
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/**
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* Send a specific list to a remote server.
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*/
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static bool
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Send_List(CLIENT *Client, CHANNEL *Chan, struct list_head *Head, char Type)
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{
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struct list_elem *elem;
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elem = Lists_GetFirst(Head);
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while (elem) {
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if (!IRC_WriteStrClient(Client, "MODE %s +%c %s",
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Channel_Name(Chan), Type,
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Lists_GetMask(elem))) {
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return DISCONNECTED;
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}
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elem = Lists_GetNext(elem);
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}
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return CONNECTED;
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}
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/**
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* Synchronize invite, ban, except, and G-Line lists between servers.
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*
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* @param Client New server.
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* @return CONNECTED or DISCONNECTED.
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*/
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static bool
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Synchronize_Lists(CLIENT * Client)
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{
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CHANNEL *c;
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struct list_head *head;
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struct list_elem *elem;
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time_t t;
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assert(Client != NULL);
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/* g-lines */
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head = Class_GetList(CLASS_GLINE);
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elem = Lists_GetFirst(head);
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while (elem) {
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t = Lists_GetValidity(elem) - time(NULL);
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if (!IRC_WriteStrClient(Client, "GLINE %s %ld :%s",
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Lists_GetMask(elem),
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t > 0 ? (long)t : 0,
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Lists_GetReason(elem)))
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return DISCONNECTED;
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elem = Lists_GetNext(elem);
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}
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c = Channel_First();
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while (c) {
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if (!Send_List(Client, c, Channel_GetListExcepts(c), 'e'))
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return DISCONNECTED;
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if (!Send_List(Client, c, Channel_GetListBans(c), 'b'))
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return DISCONNECTED;
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if (!Send_List(Client, c, Channel_GetListInvites(c), 'I'))
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return DISCONNECTED;
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c = Channel_Next(c);
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}
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return CONNECTED;
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}
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/**
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* Send CHANINFO commands to a new server (inform it about existing channels).
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* @param Client New server
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* @param Chan Channel
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*/
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static bool
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Send_CHANINFO(CLIENT * Client, CHANNEL * Chan)
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{
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char *modes, *topic;
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bool has_k, has_l;
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#ifdef DEBUG
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Log(LOG_DEBUG, "Sending CHANINFO commands for \"%s\" ...",
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Channel_Name(Chan));
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#endif
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modes = Channel_Modes(Chan);
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topic = Channel_Topic(Chan);
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if (!*modes && !*topic)
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return CONNECTED;
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has_k = Channel_HasMode(Chan, 'k');
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has_l = Channel_HasMode(Chan, 'l');
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/* send CHANINFO */
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if (!has_k && !has_l) {
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if (!*topic) {
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/* "CHANINFO <chan> +<modes>" */
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return IRC_WriteStrClient(Client, "CHANINFO %s +%s",
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Channel_Name(Chan), modes);
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}
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/* "CHANINFO <chan> +<modes> :<topic>" */
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return IRC_WriteStrClient(Client, "CHANINFO %s +%s :%s",
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Channel_Name(Chan), modes, topic);
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}
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/* "CHANINFO <chan> +<modes> <key> <limit> :<topic>" */
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return IRC_WriteStrClient(Client, "CHANINFO %s +%s %s %lu :%s",
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Channel_Name(Chan), modes,
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has_k ? Channel_Key(Chan) : "*",
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has_l ? Channel_MaxUsers(Chan) : 0, topic);
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} /* Send_CHANINFO */
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#endif /* IRCPLUS */
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/**
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* Handle ENDOFMOTD (376) numeric and login remote server.
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* The peer is either an IRC server (no IRC+ protocol), or we got the
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* ENDOFMOTD numeric from an IRC+ server. We have to register the new server.
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*/
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GLOBAL bool
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IRC_Num_ENDOFMOTD(CLIENT * Client, UNUSED REQUEST * Req)
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{
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int max_hops, i;
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CLIENT *c;
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CHANNEL *chan;
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Client_SetType(Client, CLIENT_SERVER);
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Log(LOG_NOTICE | LOG_snotice,
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"Server \"%s\" registered (connection %d, 1 hop - direct link).",
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Client_ID(Client), Client_Conn(Client));
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/* Get highest hop count */
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max_hops = 0;
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c = Client_First();
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while (c) {
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if (Client_Hops(c) > max_hops)
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max_hops = Client_Hops(c);
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c = Client_Next(c);
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}
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/* Inform the new server about all other servers, and announce the
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* new server to all the already registered ones. Important: we have
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* to do this "in order" and can't introduce servers of which the
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* "toplevel server" isn't known already. */
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for (i = 0; i < (max_hops + 1); i++) {
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for (c = Client_First(); c != NULL; c = Client_Next(c)) {
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if (Client_Type(c) != CLIENT_SERVER)
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continue; /* not a server */
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if (Client_Hops(c) != i)
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continue; /* not actual "nesting level" */
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if (c == Client || c == Client_ThisServer())
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continue; /* that's us or the peer! */
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if (!Announce_Server(Client, c))
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return DISCONNECTED;
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}
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}
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/* Announce all the users to the new server */
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c = Client_First();
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while (c) {
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if (Client_Type(c) == CLIENT_USER ||
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Client_Type(c) == CLIENT_SERVICE) {
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if (!Client_Announce(Client, Client_ThisServer(), c))
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return DISCONNECTED;
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}
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c = Client_Next(c);
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}
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/* Announce all channels to the new server */
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chan = Channel_First();
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while (chan) {
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if (Channel_IsLocal(chan)) {
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chan = Channel_Next(chan);
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continue;
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}
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#ifdef IRCPLUS
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/* Send CHANINFO if the peer supports it */
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if (Client_HasFlag(Client, 'C')) {
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if (!Send_CHANINFO(Client, chan))
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return DISCONNECTED;
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}
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#endif
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if (!Announce_Channel(Client, chan))
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return DISCONNECTED;
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/* Get next channel ... */
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chan = Channel_Next(chan);
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}
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#ifdef IRCPLUS
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if (Client_HasFlag(Client, 'L')) {
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LogDebug("Synchronizing INVITE- and BAN-lists ...");
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if (!Synchronize_Lists(Client))
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return DISCONNECTED;
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}
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#endif
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if (!IRC_WriteStrClient(Client, "PING :%s",
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Client_ID(Client_ThisServer())))
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return DISCONNECTED;
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return CONNECTED;
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} /* IRC_Num_ENDOFMOTD */
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/**
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* Handle ISUPPORT (005) numeric.
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*/
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GLOBAL bool
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IRC_Num_ISUPPORT(CLIENT * Client, REQUEST * Req)
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{
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int i;
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char *key, *value;
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for (i = 1; i < Req->argc - 1; i++) {
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key = Req->argv[i];
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value = strchr(key, '=');
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if (value)
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*value++ = '\0';
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else
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value = "";
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if (strcmp("NICKLEN", key) == 0) {
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if ((unsigned int)atol(value) == Conf_MaxNickLength - 1)
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continue;
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/* Nickname length settings are different! */
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Log(LOG_ERR,
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"Peer uses incompatible nickname length (%d/%d)! Disconnecting ...",
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Conf_MaxNickLength - 1, atoi(value));
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Conn_Close(Client_Conn(Client),
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"Incompatible nickname length",
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NULL, false);
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return DISCONNECTED;
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}
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}
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return CONNECTED;
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} /* IRC_Num_ISUPPORT */
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/* -eof- */
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