added report of most used path in email

config.yml.example

@@ -53,6 +53,7 @@ reports:
 #      - visibility
 #      - path
 #    params:
+#      showPaths: 5 # Amount of AS_PATHs to report in the alert
 #      senderEmail: bgpalerter@xxxx
 #      # BGPalerter uses nodemailer.
 #      # The smtp section can be configured with all the parameters available at https://nodemailer.com/smtp/

docs/configuration.md

@@ -158,6 +158,7 @@ Parameters for this report module:
 
 |Parameter| Description| 
 |---|---|
+|showPaths| Amount of AS_PATHs to report in the alert (0 to disable). | 
 |senderEmail| The email address that will be used as sender for the alerts. | 
 |smtp| A dictionary containing the SMTP configuration. Some parameters are described in `config.yml.example`. For all the options refer to the [nodemailer documentation](https://nodemailer.com/smtp/). | 
 |notifiedEmails| A dictionary containing email addresses grouped by user groups.  (key: group, value: list of emails)| 

reports/email_templates/emailTemplates.js

@@ -48,7 +48,10 @@ Now announced with:   ${newprefix}\n\
 When event started:   ${earliest} UTC\n\
 Last event:           ${latest} UTC\n\
 Detected by peers:    ${peers}\n\
-See in BGPlay:        ${bgplay}';
+See in BGPlay:        ${bgplay}\n\
+\n\
+Top ${pathNumber} most used AS paths:\n\
+${paths}';
 
 const templateNewPrefix = '${summary}\n\
 \n\

reports/email_templates/hijack.txt

@@ -12,4 +12,7 @@ Now announced with:   ${newprefix}
 When event started:   ${earliest} UTC
 Last event:           ${latest} UTC
 Detected by peers:    ${peers}
-See in BGPlay:        ${bgplay}
+See in BGPlay:        ${bgplay}
+
+Top ${pathNumber} most used AS paths:
+${paths}

reports/reportEmail.js

@@ -143,6 +143,21 @@ export default class ReportEmail extends Report {
 
         switch(channel){
             case "hijack":
+                const pathsCount = {};
+                const pathIndex = content.data
+                    .map(i => JSON.stringify(i.matchedMessage.path.getValues().slice(1)))
+                    .forEach(path => {
+                        if (!pathsCount[path]){
+                            pathsCount[path] = 0;
+                        }
+                        pathsCount[path] ++;
+                    });
+
+                const sortedPathIndex = Object.keys(pathsCount)
+                    .map(key => [key, pathsCount[key]] );
+
+                sortedPathIndex.sort((first, second) => second[1] - first[1]);
+
                 matched = content.data[0].matchedRule;
                 context.prefix = matched.prefix;
                 context.description = matched.description;
@@ -151,6 +166,10 @@ export default class ReportEmail extends Report {
                 context.neworigin = content.data[0].matchedMessage.originAS;
                 context.newprefix = content.data[0].matchedMessage.prefix;
                 context.bgplay = this._getBGPlayLink(matched.prefix, content.earliest, content.latest);
+                context.pathNumber = (this.params.showPaths > 0) ? Math.min(this.params.showPaths, sortedPathIndex.length) : "";
+                context.paths = (this.params.showPaths > 0) ? sortedPathIndex
+                    .slice(0, this.params.showPaths)
+                    .map(i => i[0]).join("\n") : "Disabled";
                 break;
 
             case "visibility":
@@ -205,7 +224,6 @@ export default class ReportEmail extends Report {
             this.params.notifiedEmails &&
             this.params.notifiedEmails["default"] &&
             this.params.notifiedEmails["default"].length) {
-
             const emailGroups = this.getEmails(content);
 
             for (let emails of emailGroups) {