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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2013, 2015-2016 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2012-2013, 2017-2019 Sadie Powell <sadie@witchery.services>
* Copyright (C) 2012 Robby <robby@chatbelgie.be>
* Copyright (C) 2012 ChrisTX <xpipe@hotmail.de>
* Copyright (C) 2012 Adam <Adam@anope.org>
* Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2008, 2010 Craig Edwards <brain@inspircd.org>
* Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
* Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net>
* Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#ifndef _WIN32
#include <arpa/inet.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <unistd.h>
#include <fcntl.h>
#include <netdb.h>
#else
#include "inspircd_win32wrapper.h"
#endif
#include <cerrno>
/* Contains irc-specific definitions */
namespace irc
{
/** This namespace contains various protocol-independent helper classes.
* It also contains some types which are often used by the core and modules
* in place of inet_* functions and types.
*/
namespace sockets
{
union CoreExport sockaddrs
{
struct sockaddr sa;
struct sockaddr_in in4;
struct sockaddr_in6 in6;
struct sockaddr_un un;
/** Return the family of the socket (e.g. AF_INET). */
int family() const;
/** Return the size of the structure for syscall passing */
socklen_t sa_size() const;
/** Return port number or -1 if invalid */
int port() const;
/** Return IP only */
std::string addr() const;
/** Return human-readable IP/port pair */
std::string str() const;
bool operator==(const sockaddrs& other) const;
inline bool operator!=(const sockaddrs& other) const { return !(*this == other); }
};
struct CoreExport cidr_mask
{
/** Type, AF_INET or AF_INET6 */
unsigned char type;
/** Length of the mask in bits (0-128) */
unsigned char length;
/** Raw bits. Unused bits must be zero */
unsigned char bits[16];
cidr_mask() {}
/** Construct a CIDR mask from the string. Will normalize (127.0.0.1/8 => 127.0.0.0/8). */
cidr_mask(const std::string& mask);
/** Construct a CIDR mask of a given length from the given address */
cidr_mask(const irc::sockets::sockaddrs& addr, unsigned char len);
/** Equality of bits, type, and length */
bool operator==(const cidr_mask& other) const;
/** Ordering defined for maps */
bool operator<(const cidr_mask& other) const;
/** Match within this CIDR? */
bool match(const irc::sockets::sockaddrs& addr) const;
/** Human-readable string */
std::string str() const;
};
/** Match CIDR, including an optional username/nickname part.
*
* This function will compare a human-readable address (plus
* optional username and nickname) against a human-readable
* CIDR mask, for example joe!bloggs\@1.2.3.4 against
* *!bloggs\@1.2.0.0/16. This method supports both IPV4 and
* IPV6 addresses.
* @param address The human readable address, e.g. fred\@1.2.3.4
* @param cidr_mask The human readable mask, e.g. *\@1.2.0.0/16
* @param match_with_username Does the mask include a nickname segment?
* @return True if the mask matches the address
*/
CoreExport bool MatchCIDR(const std::string &address, const std::string &cidr_mask, bool match_with_username);
/** Convert an address-port pair into a binary sockaddr
* @param addr The IP address, IPv4 or IPv6
* @param port The port, 0 for unspecified
* @param sa The structure to place the result in. Will be zeroed prior to conversion
* @return true if the conversion was successful, false if not.
*/
CoreExport bool aptosa(const std::string& addr, int port, irc::sockets::sockaddrs& sa);
/** Convert a UNIX socket path to a binary sockaddr.
* @param path The path to the UNIX socket.
* @param sa The structure to place the result in. Will be zeroed prior to conversion.
* @return True if the conversion was successful; otherwise, false.
*/
CoreExport bool untosa(const std::string& path, irc::sockets::sockaddrs& sa);
/** Determines whether the specified file is a UNIX socket.
* @param file The path to the file to check.
* @return True if the file is a UNIX socket; otherwise, false.
*/
CoreExport bool isunix(const std::string& file);
}
}
/** Represents information about a failed port binding. */
struct CoreExport FailedPort
{
/** The error which happened during binding. */
int error;
/** The endpoint on which we were attempting to bind. */
irc::sockets::sockaddrs sa;
/** The config tag that the listener was created from. */
ConfigTag* tag;
FailedPort(int err, irc::sockets::sockaddrs& ep, ConfigTag* cfg)
: error(err)
, sa(ep)
, tag(cfg)
{
}
};
/** A list of failed port bindings, used for informational purposes on startup */
typedef std::vector<FailedPort> FailedPortList;
#include "socketengine.h"
/** This class handles incoming connections on client ports.
* It will create a new User for every valid connection
* and assign it a file descriptor.
*/
class CoreExport ListenSocket : public EventHandler
{
public:
reference<ConfigTag> bind_tag;
const irc::sockets::sockaddrs bind_sa;
class IOHookProvRef : public dynamic_reference_nocheck<IOHookProvider>
{
public:
IOHookProvRef()
: dynamic_reference_nocheck<IOHookProvider>(NULL, std::string())
{
}
};
typedef TR1NS::array<IOHookProvRef, 2> IOHookProvList;
/** IOHook providers for handling connections on this socket,
* may be empty.
*/
IOHookProvList iohookprovs;
/** Create a new listening socket
*/
ListenSocket(ConfigTag* tag, const irc::sockets::sockaddrs& bind_to);
/** Close the socket
*/
~ListenSocket();
/** Handles new connections, called by the socket engine
*/
void OnEventHandlerRead() CXX11_OVERRIDE;
/** Inspects the bind block belonging to this socket to set the name of the IO hook
* provider which this socket will use for incoming connections.
*/
void ResetIOHookProvider();
};
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