First commit

Makefile

@@ -0,0 +1,4 @@
+main: main.c
+	gcc main.c -o main -L/usr/lib -lXm -lXt -lX11 -l:libXmHTML.so.1.1.10 
+
+

easysock.c

@@ -0,0 +1,104 @@
+#include "easysock.h"
+
+int create_socket(int network, char transport) {  
+	int domain;
+	int type;
+
+	if (network == 4) {
+		domain = AF_INET;
+	} else if (network == 6) {
+		domain = AF_INET6;
+	} else {
+		return -1;
+	}
+
+	if (transport == 'T') {
+		type = SOCK_STREAM;
+	} else if (transport == 'U') {
+		type = SOCK_DGRAM;
+	} else {
+		return -1;
+	}
+
+	int newSock = socket(domain,type,0);
+	return newSock;
+}
+
+
+void create_addr(int network, char* address, int port,struct sockaddr* dest) {
+	if (network == 4) {
+		struct sockaddr_in listen_address;
+		
+		listen_address.sin_family = AF_INET;
+		listen_address.sin_port = htons(port);
+		inet_pton(AF_INET,address,&listen_address.sin_addr);
+		memcpy(dest,&listen_address,sizeof(listen_address));
+		return;	
+
+	} else if (network == 6) {
+		struct sockaddr_in6 listen_ipv6;
+		listen_ipv6.sin6_family = AF_INET6;
+		listen_ipv6.sin6_port = htons(port);
+		inet_pton(AF_INET6,address,&listen_ipv6.sin6_addr);
+		memcpy(dest,&listen_ipv6,sizeof(listen_ipv6));
+		return;
+
+	} else {
+		exit(202);
+	}
+		
+}
+
+int create_local (int network, char transport, char* address, int port,struct sockaddr* addr_struct) {
+	int socket = create_socket(network,transport);
+	if (socket < 0) {
+		exit(errno);
+	}
+	create_addr(network,address,port,addr_struct);
+	int addrlen;
+	if (network == 4) {
+		addrlen = sizeof(struct sockaddr_in);
+	} else if (network == 6) {
+		addrlen = sizeof(struct sockaddr_in6);
+	} else {
+		exit(207);
+	}
+
+	/* The value of addrlen should be the size of the 'sockaddr'. 
+	This should be set to the size of 'sockaddr_in' for IPv4, and 'sockaddr_in6' for IPv6.
+	See https://stackoverflow.com/questions/73707162/socket-bind-failed-with-invalid-argument-error-for-program-running-on-macos */
+
+	int i = bind (socket,addr_struct,(socklen_t)addrlen);
+	if (i < 0) {
+		exit(errno);
+	}
+	return socket;
+}
+
+int create_remote (int network,char transport,char* address,int port,struct sockaddr* remote_addr_struct) {
+
+
+	int socket = create_socket(network,transport);
+	if (socket < 0) {
+                exit(errno);
+        }
+        create_addr(network,address,port,remote_addr_struct);
+        int addrlen;
+	if (network == 4) {
+		addrlen = sizeof(struct sockaddr_in);
+	} else if (network == 6) {
+		addrlen = sizeof(struct sockaddr_in6);
+	} else {
+		exit(207);
+	}
+
+	/* The value of addrlen should be the size of the 'sockaddr'. 
+	This should be set to the size of 'sockaddr_in' for IPv4, and 'sockaddr_in6' for IPv6.
+	See https://stackoverflow.com/questions/73707162/socket-bind-failed-with-invalid-argument-error-for-program-running-on-macos */
+
+        int i = connect(socket,remote_addr_struct,(socklen_t)addrlen);
+	if (i < 0) {
+		exit(errno);
+	}
+        return socket;
+}

easysock.h

@@ -0,0 +1,54 @@
+#ifndef EASYSOCK_H_
+#define EASYSOCK_H_
+
+#include <string.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+
+
+/* This function takes:
+a layer 3 - network layer - integer, which must be '4' for IPv4
+and 6 for IPv6; and
+a layer 4 - transport layer - character, which must be 'T' for
+TCP or 'U' for UDP. 
+
+It returns the created socket, or -1 if the socket creation failed.*/
+
+int 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 exits with error code 202 if the network parameter contained neither '4'
+nor '6'. */
+
+void create_addr(int network, 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 exits with errno.*/
+
+int create_local (int network, char transport, 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.
+
+It prints the error returned by 'connect' if something went wrong, and exits with errno.*/
+
+int create_remote (int network,char transport,char* address,int port,struct sockaddr* remote_addr_struct);
+
+
+#endif

main.c

@@ -0,0 +1,67 @@
+#include <Xm/Xm.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <Xm/PushB.h>
+#include <Xm/TextF.h>
+#include <Xm/Form.h>
+#include <XmHTML/XmHTML.h>
+#include "easysock.h"
+
+void testFunc(Widget,XtPointer,XmPushButtonCallbackStruct *);
+
+int main(int argc,char** argv) {
+	Widget window,top_wid,search_bar,search,result;
+	XtAppContext app;
+	top_wid = XtVaAppInitialize(&app,
+			"Web Browser",
+			NULL,0,&argc,argv,NULL,NULL);
+
+	window = XtVaCreateManagedWidget("Main Window",
+					xmFormWidgetClass,
+					top_wid,
+					NULL);
+
+	search = XtVaCreateManagedWidget("Search",
+					xmPushButtonWidgetClass,
+					window,
+					XmNtopAttachment,XmATTACH_FORM,
+					XmNrightAttachment,XmATTACH_FORM,
+					NULL);
+
+	search_bar = XtVaCreateManagedWidget("Search Bar",
+					xmTextFieldWidgetClass,
+					window,
+					XmNleftAttachment,XmATTACH_FORM,
+					XmNtopAttachment,XmATTACH_FORM,
+					XmNrightAttachment,XmATTACH_WIDGET,XmNrightWidget,search,NULL);
+
+
+	result = XtVaCreateManagedWidget("HTML Result",
+					xmHTMLWidgetClass,
+					window,
+					XmNbottomAttachment,XmATTACH_FORM,
+					XmNrightAttachment,XmATTACH_FORM,
+					XmNleftAttachment,XmATTACH_FORM,
+					XmNtopAttachment,XmATTACH_WIDGET,XmNtopWidget,search_bar,NULL);
+
+	int val = 5;
+	Widget widget_array[] = {search_bar,result};
+	XtAddCallback(search,XmNactivateCallback,testFunc,widget_array);
+
+
+
+	
+	XtRealizeWidget(top_wid);
+	XtAppMainLoop(app);
+	
+}
+
+void testFunc(Widget w, XtPointer client_data, XmPushButtonCallbackStruct *callback_struct) {
+	Widget* widget_list = (Widget *)client_data;
+	Widget result_widget = widget_list[1];
+	Widget text_widget = widget_list[0];
+	
+	XmHTMLTextSetString(result_widget,"");
+//	printf("%d\n",val);
+//	exit(2);
+}