+#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;
+ };
+
+ struct 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
+ * @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:
+ const 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();
+};