+#include <unistd.h>
+#include <fcntl.h>
+#include <netdb.h>
+
+#else
+
+#include "inspircd_win32wrapper.h"
+
+#endif
+
+#include <cerrno>
+#include "socketengine.h"
+
+/* 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
+ {
+
+ /* macros to the relevant system address description structs */
+#ifdef IPV6
+ /** insp_sockaddr for ipv6
+ */
+ typedef struct sockaddr_in6 insp_sockaddr;
+ /** insp_inaddr for ipv6
+ */
+ typedef struct in6_addr insp_inaddr;
+#define AF_FAMILY AF_INET6
+#define PF_PROTOCOL PF_INET6
+
+#else
+ /** insp_sockaddr for ipv4
+ */
+ typedef struct sockaddr_in insp_sockaddr;
+ /** insp_inaddr for ipv4
+ */
+ typedef struct in_addr insp_inaddr;
+#define AF_FAMILY AF_INET
+#define PF_PROTOCOL PF_INET
+
+#endif
+ /** Match raw binary data using CIDR rules.
+ *
+ * This function will use binary comparison to compare the
+ * two bit sequences, address and mask, up to mask_bits
+ * bits in size. If they match, it will return true.
+ * @param address The whole address, of 4 or 16 bytes in length
+ * @param mask The mask, from 1 to 16 bytes in length, anything
+ * from 1 to 128 bits of which is significant
+ * @param mask_Bits How many bits of the mask parameter are significant
+ * for this comparison.
+ * @returns True if the first mask_bits of address matches the first
+ * mask_bits of mask.
+ */
+ CoreExport bool MatchCIDRBits(const unsigned char* address, const unsigned char* mask, unsigned int mask_bits);
+
+ /** Match CIDR, without matching username/nickname parts.
+ *
+ * This function will compare a human-readable address against a human-
+ * readable CIDR mask, for example 1.2.3.4 against 1.2.0.0/16. This
+ * method supports both IPV4 and IPV6 addresses.
+ * @param address The human readable address, e.g. 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);
+
+ /** 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);
+
+ /** Convert an insp_inaddr into human readable form.
+ *
+ * @param n An insp_inaddr (IP address) structure
+ * @return A human-readable address. IPV6 addresses
+ * will be shortened to remove fields which are 0.
+ */
+ CoreExport const char* insp_ntoa(insp_inaddr n);
+
+ /** Convert a human-readable address into an insp_inaddr.
+ *
+ * @param a A human-readable address
+ * @param n An insp_inaddr struct which the result
+ * will be copied into on success.
+ * @return This method will return a negative value if address
+ * does not contain a valid address family. 0 if the address is
+ * does not contain a valid string representing a valid network
+ * address. A positive value is returned if the network address
+ * was successfully converted.