From 1f2664ee622668b8d63ea5aba76e574d56677c20 Mon Sep 17 00:00:00 2001
From: VSORC <josuer08@gmail.com>
Date: Thu, 26 Sep 2019 20:25:42 -0400
Subject: [PATCH] All new aditions to topology

---
 js/topology/common.js           | 685 ++++++++++++++++++++++++++++++++
 js/topology/d3.min.js           |   2 +
 js/topology/jquery-3.3.1.min.js |   2 +
 js/topology/topology.js         | 325 +++++++++++++++
 node_modules/.bin/mime          |   9 +-
 src/index.js                    |   2 +-
 src/views/topology.ejs          |  32 ++
 styles/colors.css               |  53 +++
 styles/topology.css             |  66 +++
 9 files changed, 1174 insertions(+), 2 deletions(-)
 create mode 100644 js/topology/common.js
 create mode 100644 js/topology/d3.min.js
 create mode 100644 js/topology/jquery-3.3.1.min.js
 create mode 100644 js/topology/topology.js
 mode change 120000 => 100755 node_modules/.bin/mime
 create mode 100644 styles/colors.css
 create mode 100644 styles/topology.css

diff --git a/js/topology/common.js b/js/topology/common.js
new file mode 100644
index 0000000..b892a99
--- /dev/null
+++ b/js/topology/common.js
@@ -0,0 +1,685 @@
+// Copyright (c) 2018 Maen Artimy
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * An object to build html tables.
+ */
+function Tables(category) {
+
+    // Category may be: flows, groups, meters, (and logs?)
+    var category = category;
+
+    /**
+     * Build table rows.
+     */
+    function makeRows(dpid, table, hdr_format, cell_format) {
+        // Create table header and rows and link them to data
+        // Modifies the 'table' object as it proceeds
+
+        var cols = [];
+        var $col = $('<tr></tr>');
+
+        // The rows in flow tables have checkboxes
+        if (category === 'flow') {
+            var $checkbox = $('<input type="checkbox" class="checkall"/>');
+            var $checktr = $('<th></th>').attr('data-sort', "nosort");
+            $checktr.append($checkbox);
+            $col.append($checktr);
+        }
+
+        // Build the table header
+        for (var i in table.fields) {
+            cols.push(table.fields[i]);
+            var $hdr = $('<th></th>');
+            var format = hdr_format(table.fields[i]);
+            $hdr.text(format[0]);
+            $hdr.attr('data-sort', format[1]);
+            $col.append($hdr);
+        }
+        table['$header'] = $col;
+
+        // Build the table rows
+        // The rows is an array of objects. Each object has the original data
+        // and the formatted data displayed in the row's cells
+        var rows = [];
+        table.data.forEach(function (item) {
+            var $row = $('<tr></tr>'); //.addClass('editable');
+            if (category === 'flow') {
+                $row.append($('<td><input type="checkbox" class="rowbox"/></td>'));
+            }
+            item.dpid = dpid;
+            for (var i in cols) {
+                var field = cols[i];
+                var txt = cell_format(item[field]);
+                $row.append($('<td></td>').text(txt));
+            }
+            rows.push({
+                dataitem: item,
+                $row: $row
+            });
+        });
+
+        // Flow tables are sorted by default by flow priority
+        if (category === 'flow') {
+            function compare(a, b) {
+                return b.dataitem.priority - a.dataitem.priority;
+            }
+            rows.sort(compare);
+        }
+
+        table['rows'] = rows;
+
+        // The row's checkbox value will match the header's checkbox value.
+        //if (typeof ($checkbox) !== "undefined") {
+        if ($checkbox) {
+            $checkbox.change(function () {
+                // Execlude hidden rows
+                //$(this).closest('table').find('tr').not('.hiddenrow').find('.rowbox').prop('checked', this.checked);
+                $(this).closest('table').find('.rowbox').prop('checked', this.checked);
+            });
+        }
+    }
+
+
+    /**
+     * Build the table's footer using the 'table' object
+     */
+    function makeFooter(dpid, table, ftr_format, cell_format) {
+
+        var $footer = $('<table></table>').addClass('oneliner');
+
+        var $col = $('<tr></tr>');
+        for (var i in table.extra.labels) {
+            var item = table.extra.labels[i];
+            var $hdr = $('<td></td>');
+            var label = ftr_format(item);
+            var data = cell_format(table.extra.data[item]);
+            $hdr.text(label + " : " + data);
+            $col.append($hdr);
+        }
+        $footer.append($col);
+        table['$footer'] = $footer;
+    }
+
+    // Attach event listener for rows
+    // function eventListener(row) {
+    //     $(row.$row).unbind('click');
+    //     $(row.$row).on('click', function(e) {
+    //         e.preventDefault();
+    //         sessionStorage.setItem(category, JSON.stringify(row.dataitem));
+    //         var msg = "Table entry copied to session storage.";
+    //         displayMessage(msg);
+    //     });
+    // };
+
+    /**
+     * Build the complete table by adding the components created by other functions.
+     */
+    function updateTable(dp_table) {
+        var $table = $('<table></table>').addClass('sortable').addClass('fixed');
+        var $tableHead = $('<thead></thead>');
+        var $tableBody = $('<tbody></tbody>');
+
+        $tableHead.append(dp_table.$header);
+        if (dp_table.rows) {
+            dp_table.rows.forEach(function (row) {
+                $tableBody.append(row.$row);
+                //eventListener(row);
+            });
+        }
+        $table.append($tableHead);
+        $table.append($tableBody);
+
+        //dp_table['$table'] = $table; //if a reference needs to be kept
+
+        return $table;
+    }
+
+    /**
+     * Build the card surrounding the table. The card
+     * may have additional data, such as caption and stats
+     */
+    function buildTableCard(dp_table) {
+
+        var $card = $('<div></div>').addClass('tableframe');
+        var $header = $('<div></div>').addClass('header');
+        var $container = $('<div></div>').addClass('container');
+        var $footer = $('<div></div>').addClass('footing');
+
+        var $title = $('<h1></h1>').text(dp_table.label + ' ' + dp_table.table_id);
+        var $alerts = $('<span class="alert"</span>');
+
+        $header.append($title);
+        $header.append($alerts);
+
+        // Apply only to flow tables
+        if (dp_table.type === "flows") {
+            var dpid = dp_table.extra;      // Flow tables have dpid in the extra field
+            var id = 'C' + dpid + '-' + dp_table.table_id;
+            $container.attr('id', id)
+
+            var $menu = getMenu(dp_table);
+
+            // Add collapse button
+            $hide = $('<button type="button" class="tablebtn"></button>');
+            $icon = $('<span class="icon icon-minimize"></span>');
+            //$icon = $('<a href="#0" class="icon icon-minimize"></a>)');
+            $hide.append($icon);
+            $hide.on('click', function () {
+                $icon.toggleClass("icon-minimize icon-maximize");
+                $container.slideToggle('fast', function () {
+                    $menu.toggle($container.is(':visible'))
+                    saveInSession("hidden", id, !$container.is(':visible'));
+                });
+                console.log($icon)
+
+            })
+            if (getFromSession("hidden", id)) {
+                $menu.toggle(false);
+                $container.toggle(false);
+                $icon.toggleClass("icon-minimize icon-maximize");
+            };
+
+            // Add move button
+            $move = $('<button type="button" class="tablebtn"><i class="icon icon-move"></i></button>');
+            $move.on('click', function () {
+                var $prev = $card.prev();
+                console.log($prev)
+                if ($prev.length > 0) {
+                    // if the table card has a previous sibling
+                    // swap with animation.
+                    $prev.animate({
+                        opacity: 0.25,
+                        height: "toggle"
+                    }, 300, function () {
+                        $card.insertBefore($prev);
+                        $prev.animate({
+                            opacity: 1.0,
+                            height: "toggle"
+                        }, 300, function () {
+                            var order_list = [];
+                            $card.parent('div').children().each(function (idx, elem) {
+                                order_list.push($(elem).data('order'));
+                            });
+                            var tab_id = $card.closest('.tab-panel').attr('id');
+                            saveInSession("order", tab_id, order_list);
+                        });
+                    });
+                }
+
+            })
+
+            $header.prepend($move);
+            $header.prepend($hide);
+            $header.append($menu);
+        }
+
+        var $table = updateTable(dp_table);
+        $container.append($table);
+
+        if (dp_table.$footer) {
+            $footer.append(dp_table.$footer);
+        }
+
+        $card.append($header);
+        $card.append($container);
+        $card.append($footer);
+
+        return $card;
+    }
+
+    /**
+     * Return an array of rows whose checkboxes are cheched
+     */
+    function getSelectedRows(dp_table) {
+        var selected = [];
+        dp_table.rows.forEach(function (item) {
+            var $f = item.$row.children(':has(:checkbox:checked)');
+            if ($f.length > 0) {
+                selected.push(item);
+            }
+        });
+        return selected;
+    }
+
+    /**
+     * Set event listeneres for table options menu
+     */
+    function setMenuEvents($list, dp_table) {
+
+        // Hide a row
+        $list.on('click', 'a[href=hide]', function (e) {
+            e.preventDefault();
+            var selected = getSelectedRows(dp_table);
+            selected.forEach(function (row) {
+                row.$row.addClass("hiddenrow");
+            })
+            if (selected.length > 0) {
+                $(this).closest('.header').find('.alert').text('There are ' + selected.length + ' hidden rows!');
+            }
+        });
+
+        // Unhide all hidden rows
+        $list.on('click', 'a[href=unhide]', function (e) {
+            e.preventDefault();
+            dp_table.rows.forEach(function (row) {
+                row.$row.removeClass("hiddenrow");
+            });
+            $(this).closest('.header').find('.alert').empty();
+        });
+
+        // Delete a row.
+        // Sends a request to delete flows and hides the rows until table is refreshed.
+        // The drawback is that the entry will be hiddeneven if delete is not successful.
+        $list.on('click', 'a[href=delete]', function (e) {
+            e.preventDefault();
+            var selected = getSelectedRows(dp_table);
+            var flows = [];
+            selected.forEach(function (row) {
+                flows.push(row.dataitem)
+            });
+            if (flows.length > 0) {
+                $.post("/flowdel", JSON.stringify(flows))
+                    .done(function (response) {
+                        displayMessage(response);
+                        selected.forEach(function (row) {
+                            row.$row.addClass("hiddenrow"); //temp
+                        })
+                    })
+                    .fail(function () {
+                        var msg = "No response from controller.";
+                        displayMessage(msg);
+                    })
+            }
+        });
+
+        // Sends a request to monitor flows.
+        $list.on('click', 'a[href=monitor]', function (e) {
+            e.preventDefault();
+            var selected = getSelectedRows(dp_table);
+            var flows = [];
+            selected.forEach(function (row) {
+                flows.push(row.dataitem)
+            });
+            if (flows.length > 0) {
+                $.post("/flowmonitor", JSON.stringify(flows))
+                    .done(function (response) {
+                        displayMessage(response);
+                        selected.forEach(function (row) {
+                            row.$row.addClass("monitorrow"); //temp
+                        })
+                    })
+                    .fail(function () {
+                        var msg = "No response from controller.";
+                        displayMessage(msg);
+                    })
+            }
+        });
+
+        // Saves the row to session storage
+        $list.on('click', 'a[href=edit]', function (e) {
+            e.preventDefault();
+            var selected = getSelectedRows(dp_table);
+            if (selected.length > 0) {
+                sessionStorage.setItem(category, JSON.stringify(selected[0].dataitem));
+                var msg = "Table entry copied to session storage.";
+                displayMessage(msg);
+            }
+        });
+
+        $list.on('click', 'a', function (e) {
+            e.preventDefault();
+            var selected = getSelectedRows(dp_table);
+        });
+    }
+
+    /**
+     * Build the table's options menu
+     * @param {*} dp_table
+     */
+    function getMenu(dp_table) {
+
+        var $menu = $('<div></div>').addClass("dropdown");
+        var $button = $('<button><i class="icon icon-menu"></i></button>');
+        //$button.html('Options');
+
+        var $list = $('<div></div>').addClass("dropdown-content");
+        $list.html('<a href="delete">Delete</a> \
+            <a href="edit" disabled>Edit</a> \
+            <a href="hide">Hide</a> \
+            <a href="monitor">Monitor</a> \
+            <a href="unhide">Unhide</a>');
+
+        setMenuEvents($list, dp_table);
+
+        $menu.append($button);
+        $menu.append($list);
+
+        return $menu;
+    }
+
+    return {
+        buildTableCard: buildTableCard,
+        makeFooter: makeFooter,
+        makeRows: makeRows
+    }
+}
+
+/**
+ * An object to build html tabs
+ */
+function Tabs(category) {
+    var category = category;
+
+    // Create the tab structure
+    function htmlCode(tab_labels, msg) {
+        var keys = Object.keys(tab_labels).sort();
+        // Add tab buttons
+        var tabs = '<ul class="tab-list">';
+        for (var idx in keys) {
+            var d = keys[idx];
+            var label = category === 'switches' ? 'SW_' + tab_labels[d] : tab_labels[d];
+            tabs += '<li class="tab-control" data-tab="tab-' + tab_labels[d] + '">' + label + '</li>';
+        }
+        tabs += '</ul>';
+
+        for (var idx in keys) {
+            var s = keys[idx]
+            tabs += '<div class="tab-panel" id="tab-' + tab_labels[s] + '"><h1>' + msg + '</h1></div>';
+        }
+        return tabs;
+    }
+
+    /**
+     * Set listeners to user events.
+     */
+    function listenToEvents() {
+        // only one tab list is allowed per page
+        $('.tab-list').on('click', '.tab-control', function () {
+            //var tab_id = $(this).attr('data-tab');
+            var tab_id = $(this).data('tab');
+
+            $('.tab-control').removeClass('active');
+            $('.tab-panel').removeClass('active');
+
+            $(this).addClass('active');
+            $("#" + tab_id).addClass('active');
+
+            // Save active tab per category
+            saveInSession('activetab', '', tab_id);
+        })
+    }
+
+    // Append HTML
+    function buildTabs(parent, tab_labels, msg) {
+        var html_code = htmlCode(tab_labels, msg)
+        $(parent).empty().append(html_code);
+        listenToEvents();
+    }
+
+    // Fill tab panel
+    function buildContent(id, envelope) {
+        envelope.children('.tableframe').each(function (i, v) {
+            $(v).data('order', i);
+        })
+        var order_list = getFromSession('order', 'tab-' + id);
+        if (order_list) {
+            var $cards = envelope.children('.tableframe');
+            if ($cards.length != order_list.length) {
+                // pass, a table added/removed so we cannot use the previous order
+                saveInSession("order", null);
+            } else {
+                //var $clone = envelope.clone().empty();
+                for (var i in order_list) {
+                    var $card = $cards.eq(order_list[i]).detach();
+                    envelope.append($card);
+                }
+                //envelope = $clone;
+            }
+        }
+        $('#tab-' + id).empty().append(envelope);
+    }
+
+    // Set active tab
+    function setActive() {
+        $('.tab-control').removeClass('active');
+        $('.tab-panel').removeClass('active');
+
+        var tab_id = getFromSession('activetab', '');
+        if (tab_id) {   // Active tab has been saved
+            var $first = $('[data-tab=' + tab_id + ']')
+            $first.addClass('active');
+            $("#" + tab_id).addClass('active');
+        } else {        // No active tab saved
+            var $first = $('.tab-control').first();
+            //var tab_id = $first.attr('data-tab');
+            var tab_id = $first.data('tab');
+            $first.addClass('active');
+            $("#" + tab_id).addClass('active');
+            saveInSession('activetab', '', tab_id);
+        }
+    }
+
+    return {
+        buildTabs: buildTabs,
+        buildContent: buildContent,
+        setActive: setActive
+    };
+}
+
+/**
+ * Save in sessionStorage
+ */
+function saveInSession(objname, id, value) {
+    var page = $(document).find("title").text().replace(' ', '');
+    if (objname === 'activetab') {
+        sessionStorage.setItem(objname + page, value);
+    } else if (objname === 'hidden') {
+        if (!sessionStorage.hidden) {
+            sessionStorage.hidden = '';
+        }
+        var s = value ? sessionStorage.hidden + id : sessionStorage.hidden.replace(id, '');
+        sessionStorage.hidden = s;
+    } else if (objname === 'order') {
+        sessionStorage.setItem(objname + page + id, JSON.stringify(value));
+    }
+}
+
+/**
+ * Get from sessionStorage
+ */
+function getFromSession(objname, id) {
+    var page = $(document).find("title").text().replace(' ', '');
+    if (objname === 'activetab') {
+        return sessionStorage.getItem(objname + page);
+    } else if (objname === 'hidden') {
+        if (sessionStorage.hidden) {
+            return sessionStorage.hidden.indexOf(id) > -1
+        }
+    } else if (objname === 'order') {
+        var res = sessionStorage.getItem(objname + page + id);
+        if (res) {
+            return JSON.parse(res);
+        }
+    }
+    return null;
+}
+
+// Display messages
+function displayMessage(msg) {
+    var $x = $("#snackbar");
+    $x.text(msg)
+    $x.toggleClass("show");
+    setTimeout(function () { $x.toggleClass("show"); }, 3000);
+}
+
+// Download JSON file as text
+function downloadFile(filename, data) {
+    var element = document.createElement('a');
+    element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(data));
+    element.setAttribute('download', filename);
+    element.style.display = 'none';
+    document.body.appendChild(element);
+    element.click();
+    document.body.removeChild(element);
+}
+
+/**
+ * A Datapath Table Object.
+ *
+ */
+function DPTable(id, type, label, fields, data, extra) {
+    this.table_id = id;
+    this.type = type;
+    this.label = label;
+    this.fields = fields;
+    this.data = data;
+    this.extra = extra;
+}
+
+// fix compatibility issue with RYU output
+function fix_compatibility(odata) {
+    return odata.replace(/dl_/g, 'eth_')
+        .replace(/nw_/g, 'ipv4_')
+        .replace(/eth_vlan/g, 'vlan_vid')
+        .replace(/tp_dst/g, 'udp_dst')
+        .replace(/ipv4_proto/g, 'ip_proto');
+}
+
+// remove underscore and switch to uppercase
+function hc(myString) {
+    return myString.replace("_", " ").replace(/\b\w/g, l => l.toUpperCase())
+}
+
+// Get information from datapaths
+function getSwitchData(request, f, g) {
+    $.get("/data", "list=switches")
+        .done(function (switches) {
+            if ($.isEmptyObject(switches)) {
+                var msg = "No switches found!";
+                displayMessage(msg);
+                return
+            }
+
+            // Process the switches list
+            f(switches);
+
+            var lst = [];
+            var all_data = [];
+
+            // Request flows from all switches
+            for (var sw in switches) {
+                lst.push(
+                    $.get("/status", { status: request, dpid: switches[sw] })
+                        .done(function (flows) {
+                            all_data.push(flows)
+                        })
+                        .fail(function () {
+                            var msg = "Cannot read " + request + " form " + switches[sw] + "!";
+                            displayMessage(msg);
+                        })
+                )
+            }
+
+            // Wait for all switches to reply
+            $.when.apply(this, lst).then(function () {
+                // Process the flows
+                g(all_data);
+            });
+
+        })
+        .fail(function () {
+            var msg = "No response from server!";
+            displayMessage(msg);
+        })
+}
+
+// Format the cell content
+function cellFormating(cell) {
+    var newcell = cell;
+
+    if (typeof cell === 'object') {
+        newcell = JSON.stringify(cell);
+        newcell = newcell.replace('{}', 'ANY').replace('[]', 'DROP')
+            .replace(/{/g, '').replace(/}/g, '')
+            .replace(/^\[/, '').replace(/\]$/, '')
+            .replace(/":/g, '" = ').replace(/"/g, '')
+            .replace(/,/g, '\n');
+    } else if (cell === 4294967295) {
+        newcell = 'ANY';
+    }
+    return newcell;
+}
+
+// Table sort
+var compare = {                           // Declare compare object
+    number: function (a, b) {                  // Add a method called name
+        a = Number(a);
+        b = Number(b);
+        return a - b;
+    },
+    alphanum: function (a, b) {                  // Add a method called name
+        if (a < b) {                          // If value a is less than value b
+            return -1;                          // Return -1
+        } else {                              // Otherwise
+            return a > b ? 1 : 0;               // If a is greater than b return 1 OR
+        }                                     // if they are the same return 0
+    },
+    duration: function (a, b) {              // Add a method called duration
+        a = a.split(':');                     // Split the time at the colon
+        b = b.split(':');                     // Split the time at the colon
+
+        a = Number(a[0]) * 60 + Number(a[1]); // Convert the time to seconds
+        b = Number(b[0]) * 60 + Number(b[1]); // Convert the time to seconds
+
+        return a - b;                         // Return a minus b
+    },
+    date: function (a, b) {                  // Add a method called date
+        a = new Date(a);                      // New Date object to hold the date
+        b = new Date(b);                      // New Date object to hold the date
+
+        return a - b;                         // Return a minus b
+    }
+};
+
+$('body').on('click', '.sortable th', function (e) {
+    var $header = $(this);                  // Get the header
+    var order = $header.data('sort');       // Get value of data-sort attribute
+    var column;                             // Declare variable called column
+    var $table = $header.parents('table');
+    var $tbody = $table.find('tbody');        // Store table body
+    var $controls = $table.find('th');        // Store table headers
+    var rows = $tbody.find('tr').toArray();   // Store array containing rows
+
+    // If selected item has ascending or descending class, reverse contents
+    if ($header.is('.ascending') || $header.is('.descending')) {
+        $header.toggleClass('ascending descending');    // Toggle to other class
+        $tbody.append(rows.reverse());                // Reverse the array
+    } else if (order !== "nosort") {                 // Otherwise perform a sort
+        $header.addClass('ascending');                // Add class to header
+        // Remove asc or desc from all other headers
+        $header.siblings().removeClass('ascending descending');
+        if (compare.hasOwnProperty(order)) {  // If compare object has method
+            column = $controls.index(this);     // Search for column's index no
+
+            rows.sort(function (a, b) {               // Call sort() on rows array
+                a = $(a).find('td').eq(column).text(); // Get text of column in row a
+                b = $(b).find('td').eq(column).text(); // Get text of column in row b
+                return compare[order](a, b);           // Call compare method
+            });
+
+            $tbody.append(rows);
+        }
+    }
+});
diff --git a/js/topology/d3.min.js b/js/topology/d3.min.js
new file mode 100644
index 0000000..a75674c
--- /dev/null
+++ b/js/topology/d3.min.js
@@ -0,0 +1,2 @@
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e=Math.sqrt(n/O_),r=e/2,i=e*q_,o=r,a=e*q_+e,u=-o,f=a;t.moveTo(r,i),t.lineTo(o,a),t.lineTo(u,f),t.lineTo(-.5*r-U_*i,U_*r+-.5*i),t.lineTo(-.5*o-U_*a,U_*o+-.5*a),t.lineTo(-.5*u-U_*f,U_*u+-.5*f),t.lineTo(-.5*r+U_*i,-.5*i-U_*r),t.lineTo(-.5*o+U_*a,-.5*a-U_*o),t.lineTo(-.5*u+U_*f,-.5*f-U_*u),t.closePath()}},B_=[A_,T_,E_,R_,z_,D_,Y_];Yf.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._y0=this._y1=NaN,this._point=0},lineEnd:function(){switch(this._point){case 3:Of(this,this._x1,this._y1);case 2:this._context.lineTo(this._x1,this._y1)}(this._line||0!==this._line&&1===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1,this._line?this._context.lineTo(t,n):this._context.moveTo(t,n);break;case 1:this._point=2;break;case 2:this._point=3,this._context.lineTo((5*this._x0+this._x1)/6,(5*this._y0+this._y1)/6);default:Of(this,t,n)}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=n}},Bf.prototype={areaStart:qf,areaEnd:qf,lineStart:function(){this._x0=this._x1=this._x2=this._x3=this._x4=this._y0=this._y1=this._y2=this._y3=this._y4=NaN,this._point=0},lineEnd:function(){switch(this._point){case 1:this._context.moveTo(this._x2,this._y2),this._context.closePath();break;case 2:this._context.moveTo((this._x2+2*this._x3)/3,(this._y2+2*this._y3)/3),this._context.lineTo((this._x3+2*this._x2)/3,(this._y3+2*this._y2)/3),this._context.closePath();break;case 3:this.point(this._x2,this._y2),this.point(this._x3,this._y3),this.point(this._x4,this._y4)}},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1,this._x2=t,this._y2=n;break;case 1:this._point=2,this._x3=t,this._y3=n;break;case 2:this._point=3,this._x4=t,this._y4=n,this._context.moveTo((this._x0+4*this._x1+t)/6,(this._y0+4*this._y1+n)/6);break;default:Of(this,t,n)}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=n}},Ff.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._y0=this._y1=NaN,this._point=0},lineEnd:function(){(this._line||0!==this._line&&3===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1;break;case 1:this._point=2;break;case 2:this._point=3;var e=(this._x0+4*this._x1+t)/6,r=(this._y0+4*this._y1+n)/6;this._line?this._context.lineTo(e,r):this._context.moveTo(e,r);break;case 3:this._point=4;default:Of(this,t,n)}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=n}},If.prototype={lineStart:function(){this._x=[],this._y=[],this._basis.lineStart()},lineEnd:function(){var t=this._x,n=this._y,e=t.length-1;if(e>0)for(var r,i=t[0],o=n[0],a=t[e]-i,u=n[e]-o,f=-1;++f<=e;)r=f/e,this._basis.point(this._beta*t[f]+(1-this._beta)*(i+r*a),this._beta*n[f]+(1-this._beta)*(o+r*u));this._x=this._y=null,this._basis.lineEnd()},point:function(t,n){this._x.push(+t),this._y.push(+n)}};var F_=function t(n){function e(t){return 1===n?new Yf(t):new If(t,n)}return e.beta=function(n){return t(+n)},e}(.85);Hf.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._x2=this._y0=this._y1=this._y2=NaN,this._point=0},lineEnd:function(){switch(this._point){case 2:this._context.lineTo(this._x2,this._y2);break;case 3:jf(this,this._x1,this._y1)}(this._line||0!==this._line&&1===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1,this._line?this._context.lineTo(t,n):this._context.moveTo(t,n);break;case 1:this._point=2,this._x1=t,this._y1=n;break;case 2:this._point=3;default:jf(this,t,n)}this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var I_=function t(n){function e(t){return new Hf(t,n)}return e.tension=function(n){return t(+n)},e}(0);Xf.prototype={areaStart:qf,areaEnd:qf,lineStart:function(){this._x0=this._x1=this._x2=this._x3=this._x4=this._x5=this._y0=this._y1=this._y2=this._y3=this._y4=this._y5=NaN,this._point=0},lineEnd:function(){switch(this._point){case 1:this._context.moveTo(this._x3,this._y3),this._context.closePath();break;case 2:this._context.lineTo(this._x3,this._y3),this._context.closePath();break;case 3:this.point(this._x3,this._y3),this.point(this._x4,this._y4),this.point(this._x5,this._y5)}},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1,this._x3=t,this._y3=n;break;case 1:this._point=2,this._context.moveTo(this._x4=t,this._y4=n);break;case 2:this._point=3,this._x5=t,this._y5=n;break;default:jf(this,t,n)}this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var j_=function t(n){function e(t){return new Xf(t,n)}return e.tension=function(n){return t(+n)},e}(0);Gf.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._x2=this._y0=this._y1=this._y2=NaN,this._point=0},lineEnd:function(){(this._line||0!==this._line&&3===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1;break;case 1:this._point=2;break;case 2:this._point=3,this._line?this._context.lineTo(this._x2,this._y2):this._context.moveTo(this._x2,this._y2);break;case 3:this._point=4;default:jf(this,t,n)}this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var H_=function t(n){function e(t){return new Gf(t,n)}return e.tension=function(n){return t(+n)},e}(0);$f.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._x2=this._y0=this._y1=this._y2=NaN,this._l01_a=this._l12_a=this._l23_a=this._l01_2a=this._l12_2a=this._l23_2a=this._point=0},lineEnd:function(){switch(this._point){case 2:this._context.lineTo(this._x2,this._y2);break;case 3:this.point(this._x2,this._y2)}(this._line||0!==this._line&&1===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){if(t=+t,n=+n,this._point){var e=this._x2-t,r=this._y2-n;this._l23_a=Math.sqrt(this._l23_2a=Math.pow(e*e+r*r,this._alpha))}switch(this._point){case 0:this._point=1,this._line?this._context.lineTo(t,n):this._context.moveTo(t,n);break;case 1:this._point=2;break;case 2:this._point=3;default:Vf(this,t,n)}this._l01_a=this._l12_a,this._l12_a=this._l23_a,this._l01_2a=this._l12_2a,this._l12_2a=this._l23_2a,this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var X_=function t(n){function e(t){return n?new $f(t,n):new Hf(t,0)}return e.alpha=function(n){return t(+n)},e}(.5);Wf.prototype={areaStart:qf,areaEnd:qf,lineStart:function(){this._x0=this._x1=this._x2=this._x3=this._x4=this._x5=this._y0=this._y1=this._y2=this._y3=this._y4=this._y5=NaN,this._l01_a=this._l12_a=this._l23_a=this._l01_2a=this._l12_2a=this._l23_2a=this._point=0},lineEnd:function(){switch(this._point){case 1:this._context.moveTo(this._x3,this._y3),this._context.closePath();break;case 2:this._context.lineTo(this._x3,this._y3),this._context.closePath();break;case 3:this.point(this._x3,this._y3),this.point(this._x4,this._y4),this.point(this._x5,this._y5)}},point:function(t,n){if(t=+t,n=+n,this._point){var e=this._x2-t,r=this._y2-n;this._l23_a=Math.sqrt(this._l23_2a=Math.pow(e*e+r*r,this._alpha))}switch(this._point){case 0:this._point=1,this._x3=t,this._y3=n;break;case 1:this._point=2,this._context.moveTo(this._x4=t,this._y4=n);break;case 2:this._point=3,this._x5=t,this._y5=n;break;default:Vf(this,t,n)}this._l01_a=this._l12_a,this._l12_a=this._l23_a,this._l01_2a=this._l12_2a,this._l12_2a=this._l23_2a,this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var G_=function t(n){function e(t){return n?new Wf(t,n):new Xf(t,0)}return e.alpha=function(n){return t(+n)},e}(.5);Zf.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._x2=this._y0=this._y1=this._y2=NaN,this._l01_a=this._l12_a=this._l23_a=this._l01_2a=this._l12_2a=this._l23_2a=this._point=0},lineEnd:function(){(this._line||0!==this._line&&3===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){if(t=+t,n=+n,this._point){var e=this._x2-t,r=this._y2-n;this._l23_a=Math.sqrt(this._l23_2a=Math.pow(e*e+r*r,this._alpha))}switch(this._point){case 0:this._point=1;break;case 1:this._point=2;break;case 2:this._point=3,this._line?this._context.lineTo(this._x2,this._y2):this._context.moveTo(this._x2,this._y2);break;case 3:this._point=4;default:Vf(this,t,n)}this._l01_a=this._l12_a,this._l12_a=this._l23_a,this._l01_2a=this._l12_2a,this._l12_2a=this._l23_2a,this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var V_=function t(n){function e(t){return n?new Zf(t,n):new Gf(t,0)}return e.alpha=function(n){return t(+n)},e}(.5);Qf.prototype={areaStart:qf,areaEnd:qf,lineStart:function(){this._point=0},lineEnd:function(){this._point&&this._context.closePath()},point:function(t,n){t=+t,n=+n,this._point?this._context.lineTo(t,n):(this._point=1,this._context.moveTo(t,n))}},ec.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._y0=this._y1=this._t0=NaN,this._point=0},lineEnd:function(){switch(this._point){case 2:this._context.lineTo(this._x1,this._y1);break;case 3:nc(this,this._t0,tc(this,this._t0))}(this._line||0!==this._line&&1===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){var e=NaN;if(t=+t,n=+n,t!==this._x1||n!==this._y1){switch(this._point){case 0:this._point=1,this._line?this._context.lineTo(t,n):this._context.moveTo(t,n);break;case 1:this._point=2;break;case 2:this._point=3,nc(this,tc(this,e=Kf(this,t,n)),e);break;default:nc(this,this._t0,e=Kf(this,t,n))}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=n,this._t0=e}}},(rc.prototype=Object.create(ec.prototype)).point=function(t,n){ec.prototype.point.call(this,n,t)},ic.prototype={moveTo:function(t,n){this._context.moveTo(n,t)},closePath:function(){this._context.closePath()},lineTo:function(t,n){this._context.lineTo(n,t)},bezierCurveTo:function(t,n,e,r,i,o){this._context.bezierCurveTo(n,t,r,e,o,i)}},oc.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x=[],this._y=[]},lineEnd:function(){var t=this._x,n=this._y,e=t.length;if(e)if(this._line?this._context.lineTo(t[0],n[0]):this._context.moveTo(t[0],n[0]),2===e)this._context.lineTo(t[1],n[1]);else for(var r=ac(t),i=ac(n),o=0,a=1;a<e;++o,++a)this._context.bezierCurveTo(r[0][o],i[0][o],r[1][o],i[1][o],t[a],n[a]);(this._line||0!==this._line&&1===e)&&this._context.closePath(),this._line=1-this._line,this._x=this._y=null},point:function(t,n){this._x.push(+t),this._y.push(+n)}},uc.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x=this._y=NaN,this._point=0},lineEnd:function(){0<this._t&&this._t<1&&2===this._point&&this._context.lineTo(this._x,this._y),(this._line||0!==this._line&&1===this._point)&&this._context.closePath(),this._line>=0&&(this._t=1-this._t,this._line=1-this._line)},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1,this._line?this._context.lineTo(t,n):this._context.moveTo(t,n);break;case 1:this._point=2;default:if(this._t<=0)this._context.lineTo(this._x,n),this._context.lineTo(t,n);else{var e=this._x*(1-this._t)+t*this._t;this._context.lineTo(e,this._y),this._context.lineTo(e,n)}}this._x=t,this._y=n}},gc.prototype={constructor:gc,insert:function(t,n){var e,r,i;if(t){if(n.P=t,n.N=t.N,t.N&&(t.N.P=n),t.N=n,t.R){for(t=t.R;t.L;)t=t.L;t.L=n}else t.R=n;e=t}else this._?(t=mc(this._),n.P=null,n.N=t,t.P=t.L=n,e=t):(n.P=n.N=null,this._=n,e=null);for(n.L=n.R=null,n.U=e,n.C=!0,t=n;e&&e.C;)e===(r=e.U).L?(i=r.R)&&i.C?(e.C=i.C=!1,r.C=!0,t=r):(t===e.R&&(_c(this,e),e=(t=e).U),e.C=!1,r.C=!0,bc(this,r)):(i=r.L)&&i.C?(e.C=i.C=!1,r.C=!0,t=r):(t===e.L&&(bc(this,e),e=(t=e).U),e.C=!1,r.C=!0,_c(this,r)),e=t.U;this._.C=!1},remove:function(t){t.N&&(t.N.P=t.P),t.P&&(t.P.N=t.N),t.N=t.P=null;var n,e,r,i=t.U,o=t.L,a=t.R;if(e=o?a?mc(a):o:a,i?i.L===t?i.L=e:i.R=e:this._=e,o&&a?(r=e.C,e.C=t.C,e.L=o,o.U=e,e!==a?(i=e.U,e.U=t.U,t=e.R,i.L=t,e.R=a,a.U=e):(e.U=i,i=e,t=e.R)):(r=t.C,t=e),t&&(t.U=i),!r)if(t&&t.C)t.C=!1;else{do{if(t===this._)break;if(t===i.L){if((n=i.R).C&&(n.C=!1,i.C=!0,_c(this,i),n=i.R),n.L&&n.L.C||n.R&&n.R.C){n.R&&n.R.C||(n.L.C=!1,n.C=!0,bc(this,n),n=i.R),n.C=i.C,i.C=n.R.C=!1,_c(this,i),t=this._;break}}else if((n=i.L).C&&(n.C=!1,i.C=!0,bc(this,i),n=i.L),n.L&&n.L.C||n.R&&n.R.C){n.L&&n.L.C||(n.R.C=!1,n.C=!0,_c(this,n),n=i.L),n.C=i.C,i.C=n.L.C=!1,bc(this,i),t=this._;break}n.C=!0,t=i,i=i.U}while(!t.C);t&&(t.C=!1)}}};var $_,W_,Z_,Q_,J_,K_=[],tb=[],nb=1e-6,eb=1e-12;Oc.prototype={constructor:Oc,polygons:function(){var t=this.edges;return this.cells.map(function(n){var e=n.halfedges.map(function(e){return Sc(n,t[e])});return e.data=n.site.data,e})},triangles:function(){var t=[],n=this.edges;return this.cells.forEach(function(e,r){if(o=(i=e.halfedges).length)for(var i,o,a,u=e.site,f=-1,c=n[i[o-1]],s=c.left===u?c.right:c.left;++f<o;)a=s,s=(c=n[i[f]]).left===u?c.right:c.left,a&&s&&r<a.index&&r<s.index&&Uc(u,a,s)<0&&t.push([u.data,a.data,s.data])}),t},links:function(){return this.edges.filter(function(t){return t.right}).map(function(t){return{source:t.left.data,target:t.right.data}})},find:function(t,n,e){for(var r,i,o=this,a=o._found||0,u=o.cells.length;!(i=o.cells[a]);)if(++a>=u)return null;var f=t-i.site[0],c=n-i.site[1],s=f*f+c*c;do{i=o.cells[r=a],a=null,i.halfedges.forEach(function(e){var r=o.edges[e],u=r.left;if(u!==i.site&&u||(u=r.right)){var f=t-u[0],c=n-u[1],l=f*f+c*c;l<s&&(s=l,a=u.index)}})}while(null!==a);return o._found=r,null==e||s<=e*e?i.site:null}},Bc.prototype={constructor:Bc,scale:function(t){return 1===t?this:new Bc(this.k*t,this.x,this.y)},translate:function(t,n){return 0===t&0===n?this:new Bc(this.k,this.x+this.k*t,this.y+this.k*n)},apply:function(t){return[t[0]*this.k+this.x,t[1]*this.k+this.y]},applyX:function(t){return 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diff --git a/js/topology/topology.js b/js/topology/topology.js
new file mode 100644
index 0000000..eb1d8d1
--- /dev/null
+++ b/js/topology/topology.js
@@ -0,0 +1,325 @@
+// Copyright (c) 2018 Maen Artimy
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+$(function () {
+    const tabObj = Tabs('topology');
+    const size = 60;
+    const radius = 8;
+
+    // Define the div for the tooltip
+    const div = d3.select("body").append("div")
+        .attr("class", "tooltip")
+        .style("opacity", 0);
+
+    function add_prefix(obj) {
+        return String(obj).replace(/^0+/, "Switch_");
+    }
+
+    function trim_zeros(obj) {
+        return String(obj).replace(/^0+/, "");
+    }
+
+    // Takes JSON data and convert to a graph format that D3 understands:
+    // var topDesc = {
+    //     "nodes": [
+    //       {"id": "0000000000000001", "type": "switch"},
+    //       {"id": "0000000000000002", "type": "switch"},
+    //       {"id": "16:18:83:a8:4d:1c", "type": "host"},
+    //       ...
+    //     ],
+    //     "links": [
+    //         {"source": "0000000000000002", "target": "0000000000000003",
+    //          "port": {"source": "00000003", "target": "00000002"}, "value": 4},
+    //       ...
+    //     ]}
+    function toGraph(top) {
+        var nodes = [];
+        var links = [];
+
+        var lst = top.switches;
+        for (var i = 0; i < lst.length; i++) {
+            nodes.push({ "id": lst[i].dpid, "type": "switch" });
+        }
+
+        if (top.links.length > 0) {
+            lst = top.links;
+            for (var i = 0; i < lst.length; i++) {
+                if (lst[i].src.dpid < lst[i].dst.dpid) { // prevent duplicate links
+                    links.push({
+                        "source": lst[i].src.dpid, "target": lst[i].dst.dpid, "value": 4,
+                        "port": { "source": lst[i].src.port_no, "target": lst[i].dst.port_no }
+                    });
+                }
+            }
+        } else if (top.switches.length > 1) { // represent the network with a cloud
+            nodes.push({ "id": 0, "type": "cloud" });
+            for (var i = 0; i < lst.length; i++) {
+                links.push({
+                    "source": 0, "target": lst[i].dpid, "value": 4,
+                    "port": { "source": 0, "target": 0 }
+                });
+            }
+        }
+
+        lst = top.hosts;
+        for (var i = 0; i < lst.length; i++) {
+            nodes.push({ "id": lst[i].mac, "type": "host" });
+            links.push({
+                "source": lst[i].port.dpid, "target": lst[i].mac, "value": 2,
+                "port": { "source": lst[i].port.port_no, "target": 0 }
+            });
+        }
+
+        return { "nodes": nodes, "links": links };
+    }
+
+    // Plot the topology using D3.js
+    // Many online tutorials explain how this works. Example: www.puzzlr.org/force-graphs-with-d3
+    function plotGraph(graph) {
+        var svg = d3.select("svg");
+        var width = +svg.attr("width");
+        var height = +svg.attr("height");
+
+        //custom force to put everything in a box
+        function box_force() {
+            var curr_node;
+            for (var i = 0, n = graph.nodes.length; i < n; ++i) {
+                curr_node = graph.nodes[i];
+                curr_node.x = Math.max(radius, Math.min(width - radius, curr_node.x));
+                curr_node.y = Math.max(radius, Math.min(height - radius, curr_node.y));
+            }
+        }
+
+        // Create a force layout simulation
+
+        // Link: attraction force
+        // chanrge: repulsion force
+        // x: attracts the nodes to the horizontal centre
+        // y: attracts the hosts the bottom while other nodes are attrcated to the top
+        // centre: atracts to the centre
+        // collision: avoids node collision
+        // box: keeps all nodes inside
+        var simulation = d3.forceSimulation()
+            .nodes(graph.nodes)
+            .force("link", d3.forceLink(graph.links).id(function (d) { return d.id; }).distance(size * 2))
+            .force("charge", d3.forceManyBody().strength(-size * 30))
+            .force("x", d3.forceX(width / 2))
+            .force("y", d3.forceY(function (d) {
+                if (d.type === "host") {
+                    return 3 * height / 4
+                } else {
+                    return 1 * height / 4
+                }
+            }).strength(0.25))
+            .force("centre", d3.forceCenter(width / 2, height / 2))
+            .force("collision", d3.forceCollide().radius(35))
+            .force("box", box_force);
+
+        // Create nodes with image and text
+        var node = svg.append("g")
+            .attr("class", "nodes")
+            .selectAll(".node")
+            .data(graph.nodes)
+            .enter().append("g")
+            // .attr("id", function (d) { return "N" + d.id; })
+            .attr("class", "node");
+
+        node.append("image")
+            .attr("xlink:href", function (d) {
+                if (d.type === "switch") {
+                    return "/home/img/switch.svg"
+                } else if (d.type === "cloud") {
+                    return "/home/img/cloud.svg"
+                } else {
+                    return "/home/img/pc.svg"
+                }
+            })
+            .on("mouseover", handleMouseOver)
+            .on("mouseout", handleMouseOut)
+
+        node.append("text")
+            .attr("class", "label")
+            .attr("dy", size + 14)
+            .text(function (d) { return d.id; });
+            // .text(function (d) { return d.id.replace(/^0+/, ''); });
+
+
+        // Create links with lines, circles, and text
+        var link = svg.append("g")
+            .attr("class", "links")
+            .selectAll(".link")
+            .data(graph.links)
+            .enter().append("g")
+            .attr("class", "link");
+
+        link.append("line")
+            .attr("stroke-width", function (d) { return d.value; });
+
+        link.append("circle")
+            .attr("class", "start")
+            .attr("r", radius)
+
+        link.append("circle")
+            .attr("class", "end")
+            .attr("r", radius)
+
+        link.append("text")
+            .attr("class", "start")
+            .text(function (d) { return trim_zeros(d.port.source); })
+
+        link.append("text")
+            .attr("class", "end")
+            .text(function (d) { return trim_zeros(d.port.target); })
+
+        // Simulation steps
+        function tickActions() {
+            function norm(d) {
+                return Math.sqrt((d.target.x - d.source.x) ** 2 + (d.target.y - d.source.y) ** 2);
+            }
+
+            node
+                .attr("transform", function (d) { return "translate(" + (d.x - size / 2) + "," + (d.y - size / 2) + ")"; });
+            link
+                .attr("transform", function (d) { return "translate(" + d.source.x + "," + d.source.y + ")"; });
+
+            link.selectAll("line")
+                .attr("x1", function (d) { return (d.target.x - d.source.x) * size / 2 / norm(d); })
+                .attr("y1", function (d) { return (d.target.y - d.source.y) * size / 2 / norm(d); })
+                .attr("x2", function (d) { return (d.target.x - d.source.x) * (1 - size / 2 / norm(d)); })
+                .attr("y2", function (d) { return (d.target.y - d.source.y) * (1 - size / 2 / norm(d)); })
+
+            // position of the link start port
+            link.selectAll("circle.start")
+                .attr("cx", function (d) { return (d.target.x - d.source.x) * size / 2 / norm(d); })
+                .attr("cy", function (d) { return (d.target.y - d.source.y) * size / 2 / norm(d); })
+
+            // psotion of the link end port
+            link.selectAll("circle.end")
+                .attr("cx", function (d) { return (d.target.x - d.source.x) * (1 - size / 2 / norm(d)); })
+                .attr("cy", function (d) { return (d.target.y - d.source.y) * (1 - size / 2 / norm(d)); })
+
+            link.selectAll("text.start")
+                .attr("dx", function (d) { return (d.target.x - d.source.x) * size / 2 / norm(d); })
+                .attr("dy", function (d) { return (d.target.y - d.source.y) * size / 2 / norm(d); })
+
+            link.selectAll("text.end")
+                .attr("dx", function (d) { return (d.target.x - d.source.x) * (1 - size / 2 / norm(d)); })
+                .attr("dy", function (d) { return (d.target.y - d.source.y) * (1 - size / 2 / norm(d)); })
+
+        }
+
+        // Handling mouse drag
+        node.call(d3.drag()
+            .on("start", drag_start)
+            .on("drag", drag_drag)
+            .on("end", drag_end));
+
+        function drag_start(d) {
+            if (!d3.event.active) simulation.alphaTarget(0.3).restart();
+            d.fx = d.x;
+            d.fy = d.y;
+        }
+
+        function drag_drag(d) {
+            d.fx = d3.event.x;
+            d.fy = d3.event.y;
+        }
+
+        function drag_end(d) {
+            if (!d3.event.active) simulation.alphaTarget(0);
+            d.fx = null;
+            d.fy = null;
+        }
+
+        // Handling mouse over
+        function handleMouseOver(d) {
+            div.transition()
+                .duration(200)
+                .style("opacity", .9);
+            div.html(d.type + ": " + d.id)
+                .style("left", (d3.event.pageX) + "px")
+                .style("top", (d3.event.pageY - 28) + "px");
+        }
+
+        function handleMouseOut(d) {
+            div.transition()
+                .duration(500)
+                .style("opacity", 0);
+        }
+
+        // drag_handler(node);
+
+        // run tickActions in every simulation step
+        simulation.on("tick", tickActions);
+
+    }
+
+    // Display the raw topology data
+    function listTopology(network) {
+        data = "<h1>Switches</h1>" + JSON.stringify(network.switches) + "<br>";
+        data += "<h1>Links</h1>" + JSON.stringify(network.links) + "<br>";
+        data += "<h1>Hosts</h1>" + JSON.stringify(network.hosts) + "<br>";
+        $('#data').html(data);
+    }
+
+    function getTopology() {
+        tabObj.buildTabs("#main", ["Graph", "Tables"], "Nothing to show!");
+        var $svg = $('<svg width="1116" height="600"></svg>');
+        var $data = $('<div id="data"></div>');
+        tabObj.buildContent('Graph', $svg);
+        tabObj.buildContent('Tables', $data);
+
+
+
+
+
+
+        function jsonget() {
+          const url = "http://"+location.hostname+":8080/topology"
+          let xhr = new XMLHttpRequest();
+          xhr.open('GET', url , true);
+          //console.log(xhr); //para ver en la consola
+          xhr.onload = function() {
+            if (xhr.status == 200) { //can use this.status instead
+              //console.log(xhr.responseText);// para ver en la consola
+              data = JSON.parse(xhr.responseText)
+              listTopology(data)
+              plotGraph(toGraph(data));
+            }
+          }
+          xhr.send();
+        }
+
+        jsonget();
+
+
+
+
+
+        // d3.json(location.hostname+":8080/topology").then(function (data) {
+        //     listTopology(data)
+        //     plotGraph(toGraph(data));
+        // });
+        tabObj.setActive();
+    }
+
+    // When the refresh button is clicked, clear the page and start over
+    $('.refresh').on('click', function () {
+        //$('svg').html("");
+        getTopology();
+    });
+
+    getTopology();
+
+});
diff --git a/node_modules/.bin/mime b/node_modules/.bin/mime
deleted file mode 120000
index fbb7ee0..0000000
--- a/node_modules/.bin/mime
+++ /dev/null
@@ -1 +0,0 @@
-../mime/cli.js
\ No newline at end of file
diff --git a/node_modules/.bin/mime b/node_modules/.bin/mime
new file mode 100755
index 0000000..20b1ffe
--- /dev/null
+++ b/node_modules/.bin/mime
@@ -0,0 +1,8 @@
+#!/usr/bin/env node
+
+var mime = require('./mime.js');
+var file = process.argv[2];
+var type = mime.lookup(file);
+
+process.stdout.write(type + '\n');
+
diff --git a/src/index.js b/src/index.js
index e26f9e4..a2ece0f 100644
--- a/src/index.js
+++ b/src/index.js
@@ -19,7 +19,7 @@ app.use('/styles', express.static('styles'));
 app.use('/js', express.static('js'));
 //rutas
 app.use(require('./routes/index'));
-
+// Configurar cabeceras y cors
 //inicia el servidor
 app.listen(app.get('port'), () => {
   console.log("Servidor escuchando en el puerto", app.get('port'))
diff --git a/src/views/topology.ejs b/src/views/topology.ejs
index a160864..5285022 100644
--- a/src/views/topology.ejs
+++ b/src/views/topology.ejs
@@ -11,6 +11,38 @@
   <header>
     <%include ../../partials/header%>
   </header>
+
+
+
+
+  <title>Topology</title>
+	<!-- <link rel="shortcut icon" href="img/favicon.ico" type="image/x-icon"> -->
+	<!-- <link rel="stylesheet" type="text/css" href="css\style.css?v2"> -->
+	<!-- <link rel="stylesheet" type="text/css" href="css\table.css?v2"> -->
+	<!-- <link rel="stylesheet" type="text/css" href="css\cards.css?v1"> -->
+	<!-- <link rel="stylesheet" type="text/css" href="css\tabs.css?v1"> -->
+	<!-- <link rel="stylesheet" type="text/css" href="css\menu.css?v2"> -->
+	<link rel="stylesheet" type="text/css" href="styles\topology.css?v3">
+	<script src="js/topology/jquery-3.3.1.min.js"></script>
+	<!--script src="https://d3js.org/d3.v4.min.js"></script-->
+	<script src="js/topology/d3.min.js"></script>
+</head>
+<body>
+<div class="container_16">
+	<div id="header" class="grid_16">
+	<h1>Topology</h1>
+	<button type="button" class="refresh">Refresh</button>
+	</div>
+	<!-- <div id="menu" class="grid_2"></div> -->
+	<div id="main" class="grid_14"></div>
+</div>
+<!-- <script src="js/mainmenu.js"></script> -->
+<script src="js/topology/common.js"></script>
+<script src="js/topology/topology.js"></script>
+
+
+
+
 </body>
 <footer>
   <%include ../../partials/footer%>
diff --git a/styles/colors.css b/styles/colors.css
new file mode 100644
index 0000000..0eefd88
--- /dev/null
+++ b/styles/colors.css
@@ -0,0 +1,53 @@
+/*
+    Copyright (c) Maen Artimy, 2018
+*/
+
+:root2 {
+    --pcolor-0: #0B5199;
+    --pcolor-1: #467EB7;
+    --pcolor-2: #2567AC;
+    --pcolor-3: #08407B;
+    --pcolor-4: #05315F;
+
+    --scolor-0: #EBC200;
+    --scolor-1: #FFE255;
+    --scolor-2: #FFDA27;
+    --scolor-3: #BC9C00;
+    --scolor-4: #927900;
+
+    --tcolor-0: #EB2D00;
+    --tcolor-1: #FF7655;
+    --tcolor-2: #FF5027;
+    --tcolor-3: #BC2400;
+    --tcolor-4: #921C00;
+    
+    --white: white;
+    --text-color: var(--pcolor-4);
+}
+
+:root {
+    --pcolor-0: #246767;	/* Main Primary color */
+    --pcolor-1: #699A9A;
+    --pcolor-2: #428080;
+    --pcolor-3: #0F4F4F;
+    --pcolor-4: #013535;
+    
+    --scolor-0: #AC873C;	/* Main Secondary color (1) */
+    --scolor-1: #FFE4AE;
+    --scolor-2: #D5B36E;
+    --scolor-3: #84601A;
+    --scolor-4: #593C02;
+    
+    --tcolor-0: #AC3C3C;	/* Main Secondary color (2) */
+    --tcolor-1: #FFAEAE;
+    --tcolor-2: #D56E6E;
+    --tcolor-3: #841A1A;
+    --tcolor-4: #590202;
+
+--white: white;
+--text-color: var(--pcolor-4);
+}
+
+
+/* Generated by Paletton.com © 2002-2014 */
+/* http://paletton.com */
\ No newline at end of file
diff --git a/styles/topology.css b/styles/topology.css
new file mode 100644
index 0000000..0cd945d
--- /dev/null
+++ b/styles/topology.css
@@ -0,0 +1,66 @@
+/*
+    Copyright (c) Maen Artimy, 2018
+*/
+
+@import "colors.css";
+
+svg {
+  /*background-color: var(--scolor-2);*/
+  border-style: solid;
+  border-width: 2px;
+  border-color: var(--scolor-2);
+  border-radius: 5px;
+}
+
+.node image {
+  width: 60px;
+  height: 60px;
+}
+
+text.label {
+  fill: var(--scolor-4);
+  text-anchor: start;
+}
+
+.links line {
+  stroke: var(--scolor-3);
+  stroke-opacity: 0.6;
+}
+
+circle {
+  stroke: var(--scolor-3);
+  fill: white;
+}
+
+text.start, text.end {
+  fill: var(--scolor-3);
+  text-anchor: middle;
+  alignment-baseline: middle;
+  font-size: 0.75em;
+}
+
+
+.node circle {
+  fill: #fff;
+  stroke: var(--scolor-3);
+  stroke-width: 2px;
+}
+
+.node text { font: 12px sans-serif; }
+
+.link {
+  fill: none;
+  stroke: var(--scolor-3);
+  stroke-width: 1px;
+}
+
+div.tooltip {	
+  position: absolute;			
+  text-align: left;				
+  padding: 5px;
+  color: white;
+  background: var(--scolor-3);			
+  border: 0px;		
+  border-radius: 2px;			
+  pointer-events: none;			
+}
-- 
2.25.1