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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2005-2007 Craig Edwards <craigedwards@brainbox.cc>
* Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
* Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
* Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
* Copyright (C) 2006 William Pitcock <nenolod@dereferenced.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/>.
*/
#ifndef INSPIRCD_SOCKET_H
#define INSPIRCD_SOCKET_H
#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 <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;
/** Return the size of the structure for syscall passing */
int 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, int 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);
/** Return the size of the structure for syscall passing */
inline int sa_size(const irc::sockets::sockaddrs& sa) { return sa.sa_size(); }
/** 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 binary sockaddr to an address-port pair
* @param sa The structure to convert
* @param addr the IP address
* @param port the port
* @return true if the conversion was successful, false if unknown address family
*/
CoreExport bool satoap(const irc::sockets::sockaddrs& sa, std::string& addr, int &port);
/** Convert a binary sockaddr to a user-readable string.
* This means IPv6 addresses are written as [::1]:6667, and *:6668 is used for 0.0.0.0:6668
* @param sa The structure to convert
* @return The string; "<unknown>" if not a valid address
*/
inline std::string satouser(const irc::sockets::sockaddrs& sa) { return sa.str(); }
}
}
#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;
std::string bind_addr;
int bind_port;
/** Human-readable bind description */
std::string bind_desc;
/** Create a new listening socket
*/
ListenSocket(ConfigTag* tag, const irc::sockets::sockaddrs& bind_to);
/** Handle an I/O event
*/
void HandleEvent(EventType et, int errornum = 0);
/** Close the socket
*/
~ListenSocket();
/** Handles sockets internals crap of a connection, convenience wrapper really
*/
void AcceptInternal();
};
#endif
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