Added 'PROG_VER' constant, added '--version' and '--help' flags

main.c

@@ -4,7 +4,7 @@
 #include <stdlib.h>
 #include "easysock.h"
 #define PROG_NAME "basicproxy"
-
+#define PROG_VER "0.01"
 void forward_data(int from_fd, int to_fd) {
 	int n = 0;
         char* buffer = malloc(3000*sizeof(char));
@@ -26,9 +26,23 @@ int check_ip_ver(char* address) {
 
 
 void print_prog_info() {
-	printf("%s - [Local IP address] [local port] [remote IP address] [remote port]\n",PROG_NAME);
+	printf("%s [Local IP address] [local port] [remote IP address] [remote port]\n",PROG_NAME);
+}
+
+void print_version_info() {
+	printf("%s %s\n",PROG_NAME,PROG_VER);
 }
 
+void print_help_info() {
+	printf("\n%s - A simple TCP proxy written in C.\n\n",PROG_NAME);
+	printf("Syntax - ");
+	print_prog_info();
+	printf("[Local IP address] - The local address to bind to\n"
+		"[local port] - The local port to listen on\n"
+		"[remote IP address] - The remote IP to connect to\n"
+		"[remote port] - The remote port to connect to\n");
+	printf("\nExample: %s 127.0.0.1 3000 1.2.3.4 5000 - Listen on '127.0.0.1:3000', and forward all data from there to '1.2.3.4:5000'\n\n",PROG_NAME);
+}
 int main(int argc,char* argv[]) {
 
 /* argv[1] = local address
@@ -36,6 +50,16 @@ int main(int argc,char* argv[]) {
    argv[3] = remote address
    argv[4] = remote port */
 
+	if (argc == 2) {
+		if (strcmp(argv[1],"-v") == 0 || strcmp(argv[1],"--version") == 0) {
+			print_version_info();
+			exit(0);
+		} else if (strcmp(argv[1],"-h") == 0 || strcmp(argv[1],"--help") == 0) {
+			print_help_info();
+			exit(0);
+		}
+	}
+
 	if (argc != 5) {
 		print_prog_info();
 		exit(30);