Converted easysock from CPP to C, because it was mostly just C code anyways

includes/easysock.h

@@ -0,0 +1,106 @@
+#ifdef __cplusplus
+extern "C" {
+#endif
+#ifndef EASYSOCK_H_
+#define EASYSOCK_H_
+
+#ifdef _WIN32
+	#include <winsock2.h>
+	#include <winsock.h>
+	#include <ws2tcpip.h>
+#endif
+#ifdef __unix__
+	#include <sys/types.h>
+	#include <sys/socket.h>
+	#include <netdb.h>
+	#include <unistd.h>
+	#include <arpa/inet.h>
+#endif
+
+#ifndef _WIN32
+	typedef int SOCKET;
+#endif
+
+/* Constants that can be used in place of characters, when specifying
+the transport layer protocol */
+const char ES_TCP = 'T';
+const char ES_UDP = 'U';
+
+/* This function takes:
+a layer 3 - network layer - integer, which must be '4' for IPv4
+and 6 for IPv6;
+a layer 4 - transport layer - character, which must be 'T' for
+TCP or 'U' for UDP.
+
+It creates a _blocking_ socket, and returns the created socket, or -1 
+if the socket creation failed.*/
+
+SOCKET create_socket(int network, char transport);
+
+
+/* This function fills in the sockaddr struct 'dest' based on the given information.
+'network' is an integer that contains '4' for IPv4 or '6' for IPv6;
+'address' is the address that is filled into the struct;
+port is self-explanatory;
+and dest is a pointer to the sockaddr struct that will be filled in. 
+
+The function returns with -202 if the network parameter contained neither '4'
+nor '6'. */
+
+int create_addr(int network, const char* address, int port,struct sockaddr* dest);
+
+
+
+/* This function utilizes the above two functions; it creates the socket and
+_binds_ the addresses. It is used for local sockets (server sockets). Parameters are
+same as above. 
+
+It prints the error returned by 'bind' if something went wrong, and returns ( -1 * errno ).*/
+
+SOCKET create_local (int network, char transport, const char* address, int port,struct sockaddr* addr_struct);
+
+
+/* This function utilizes the same functions as 'create_local' but _connects_ to the
+requested address. It is used for remote sockets (client sockets). The paramters are same
+as above. This function needs an empty 'sockaddr *' structure passed to it, which it will fill.
+
+If something goes wrong, this function returns with ( -1 * errno ). */
+
+SOCKET create_remote (int network,char transport, const char* address,int port,struct sockaddr* remote_addr_struct);
+
+/* check_ip_ver - This function checks if the given string is an IPv4 address (returns 4), 
+IPv6 address (returns 6) or neither (returns -1). */
+
+int check_ip_ver(const char* address);
+
+/* port_to_num - Converts a string representing a port, into a numeric value.
+Returns -1 if the string is not numeric, or exceeds the maximum port length.
+Returns -2 if the string is lower than 1024, This serves as a warning, as ports less
+than 1023 are reserved. */
+int port_to_num(const char* port_str);
+
+/* int_to_inet - Takes an int value (4 for IPv4, 6 for IPv6) and returns AF_INET or
+AF_INET6 respectively. */
+
+int int_to_inet(int network);
+
+/* char_to_socktype - Takes a character that represents a transport-layer protocol
+(currently only supports 'T' for TCP or 'U' for UDP - it returns -250 if 
+the given characters is neither of these) and return the appropriate SOCKTYPE value. */
+
+int char_to_socktype(char transport);
+
+/* inet_to_int - Takes an int value that corresponds to AF_INET or AF_INET6,
+and returns the appropriate int value. */
+int inet_to_int(int af_type);
+
+/* sockQuit - Only for windows - Cleans up the socket */
+int sock_quit(void);
+
+/* sock_close - Closes the given socket */
+int sock_close(SOCKET);
+
+#endif
+#ifdef __cplusplus
+}
+#endif